Ex Parte MAI et alDownload PDFPatent Trial and Appeal BoardNov 22, 201713412157 (P.T.A.B. Nov. 22, 2017) Copy Citation United States Patent and Trademark Office UNITED STATES DEPARTMENT OF COMMERCE United States Patent and Trademark Office Address: COMMISSIONER FOR PATENTS P.O.Box 1450 Alexandria, Virginia 22313-1450 www.uspto.gov APPLICATION NO. FILING DATE FIRST NAMED INVENTOR ATTORNEY DOCKET NO. CONFIRMATION NO. 13/412,157 03/05/2012 Alexander MAI 080437.64278US 9117 23911 7590 CROWELL & MORING LLP INTELLECTUAL PROPERTY GROUP P.O. BOX 14300 WASHINGTON, DC 20044-4300 EXAMINER GRANT, ROBERT J ART UNIT PAPER NUMBER 2859 NOTIFICATION DATE DELIVERY MODE 11/27/2017 ELECTRONIC Please find below and/or attached an Office communication concerning this application or proceeding. The time period for reply, if any, is set in the attached communication. Notice of the Office communication was sent electronically on above-indicated "Notification Date" to the following e-mail address(es): edocket @ crowell. com tche @ crowell. com PTOL-90A (Rev. 04/07) UNITED STATES PATENT AND TRADEMARK OFFICE BEFORE THE PATENT TRIAL AND APPEAL BOARD Ex parte ALEXANDER MAI and JOACHIM FROESCHL Appeal 2017-004242 Application 13/412,1571 Technology Center 2800 Before KAREN M. HASTINGS, JAMES C. HOUSEL, and JEFFREY R. SNAY Administrative Patent Judges. PER CURIAM. DECISION ON APPEAL Appellants appeal under 35 U.S.C. § 134(a) from the Primary Examiner’s final decision to reject claims 1, 2, 8, 9, 11—14, and 16—21. We have jurisdiction under 35 U.S.C. § 6(b).2 1 The Applicants (hereinafter “Appellants”) state that the real party in interest is “Bayerische Motoren Werke Aktiengesellschaft.” Appeal Br. 1. 2 Our Decision refers to the Specification filed Mar. 5, 2012 (“Spec.”), the Final Office Action mailed Feb. 25, 20016 (“Final Act.”), the Appeal Brief filed Sept. 23, 2016 (“Appeal Br.”), the Examiner’s Answer mailed Nov. 10, 2016 (“Ans.”), and the Reply Brief filed Jan. 9, 2017 (“Reply Br.”). Appeal 2017-004242 Application 13/412,157 We REVERSE and enter a NEW GROUND OF REJECTION under 37 C.F.R. § 41.50(b). BACKGROUND The subject matter on appeal relates to devices for balancing an energy accumulator in an onboard power supply system of a vehicle, the device comprising a cell stack having a series connection of a plurality of cells, a respective balancing circuit connected to voltage terminals of a cell, the circuit including a discharge resistor having a temperature dependent resistance characteristic, and a common heat sink on which discharge resistors are mounted and by which the discharge resistors are thermally coupled. App. Br. 10, Claims App’x; Spec. Tflf 2, 7, and 9. Appellants state that their device is intended to balance an energy accumulator in a simple and fast way. Id. ^ 6. Representative claim 1 below is reproduced from page 10 of the Appeal Brief (Claims Appendix) (emphases added), as follows: 1. A device for balancing an energy accumulator in an onboard power supply system of a vehicle, the device comprising: a cell stack comprising a series connection of a plurality of cells; a plurality of balancing circuits, each balancing circuit being respectively connected to voltage terminals of a cell and comprising a discharge resistor having a temperature dependent resistance characteristic; and a common heat sink on which each of the discharge resistors of the plurality balancing circuits are mounted, the common heat sink configured to thermally couple all of said discharge resistors. 2 Appeal 2017-004242 Application 13/412,157 REJECTIONS ON APPEAL I. claims 1, 2, 11—14, and 16—21 as being unpatentable under 35 U.S.C. § 103(a) by Thrap ‘1773 in view of Yang4 and Venzke;5 and II. claims 8 and 9 as being unpatentable under 35 U.S.C. § 103(a) over Thrap ‘177, Yang, and Venzke and further in view of Thrap ‘ 121.6 DISCUSSION Rejection over Thrap ‘177, Yang, and Venzke Claims 1, 2, 11—14, and 16—21 are rejected as being unpatentable under 35 U.S.C. § 103(a) by Thrap ‘177 in view of Yang and Venzke. The Examiner finds Thrap ‘177 discloses an energy accumulator comprising a cell stack including a series connection of a plurality of cells, a plurality of balancing circuits, and a common heat sink on which the balancing circuits are thermally intercoupled. Final Act. 3. The Examiner finds Thrap ‘177 does not disclose that each balancing circuit is respectively connected to voltage terminals of a cell, that each balancing circuit has a discharge resistor with a temperature dependent resistance characteristic, and that a common heat sink is configured to thermally couple all of the discharge resistors, as recited in claim 1. Id. 3 Thrap, US 7,016,177 Bl, issued Mar. 21, 2006 (“Thrap ‘177”). 4 Yang et al., US 6,097,174, issued Aug. 1, 2000 (“Yang”). 5 Venzke, US 2005/0174213 Al, published Aug. 11, 2005 (“Venzke”). 6 Thrap, US 2004/0263121 Al, published Dec. 30, 2004 (“Thrap ‘121”). 3 Appeal 2017-004242 Application 13/412,157 Thrap ‘177 is directed to protecting capacitor applications against heat, which can cause failure of capacitors. Thrap ‘177 1:16—18, 39-45. Thrap ‘177 discloses a device in which capacitors 12,714,16, and 18 are connected in series and cell balancing circuits 32, 33, and 35 connect the positive and negative terminals of adjacent capacitors (e.g., capacitors 12 and 14). Id. 2:62—65, 3:20-25, Figs. 1 and 3. Thrap ‘177 incorporates Application No. 10/423,708 (issued as US 6,806,686, as stated by Appellants at page 5 of the Appeal Brief) for a disclosure of the operation of the balancing circuits. Id. 3:25—29. As described by Appellants (Appeal Br. 5), US 6,806,686 discloses transferring energy from one capacitor to another via a balancing circuit 32 that is connected to one terminal of each capacitor. (See, US 6,806,686, 5:3—8). Thrap ‘177 further discloses interconnections 30 that can act as heat dissipaters (i.e., heat sinks), such as via portions 30a of increased surface area. Thrap ‘177 4:5—8. The Examiner finds Yang discloses a balancing circuit connected to voltage terminals of a cell and having a discharge resistor with temperature dependent resistance characteristic. Id. Yang is directed to individually adjustable automatic charging circuits that may charge batteries of different residual electric capacitors in series. Yang 1:26—35, 1:66—2:2. Yang discloses an individually adjustable automatic charging circuit that includes bias voltage impedances Z101-VZ600, which can be resistive components. Id. 2:32-44. The Examiner finds the resistors of Yang function as discharge resistors in a balancing circuit. Final Act. 3. 7 Throughout this Decision, for clarity, we present labels to elements in figures in bold font, regardless of their presentation in the original document. 4 Appeal 2017-004242 Application 13/412,157 The Examiner further finds Venzke discloses a common sink on which resistors are mounted and by which all resistors are thermally coupled. Id. The Examiner concludes it would have been obvious to incorporate the balancing circuitry of Yang into the balancing system of Thrap ‘177 to make the balancing system of Thrap ‘177 “for use in a vehicle” and to include the common heat sink of Venzke “to keep the temperature constant between all the resistors.” Id. at 3^4. Appellants assert the balancing circuit of Thrap ‘177 operates to reallocate charge between capacitors, not to discharge power via a resistor. Appeal Br. 5. Specifically, Appellants argue that charge reallocation is accomplished via a connection between a terminal of each capacitor in Thrap ‘177, as depicted in an annotated copy of Figure 1 of Thrap ‘177 on page 5 of the Appeal Brief, but claim 1 recites “each balancing circuit being respectively connected to voltage terminals of a cell.” Id. at 5—6. Appellants contend that modifying the balancing circuit of Thrap ’177 in view of Yang to provide a balancing circuit connected to the terminals of a single cell would change the principle of operation of the balancing circuit of Thrap ‘177 and render it inoperable because it would no longer reallocate charge between two capacitors. Id. Appellants further assert the Examiner has not provided a sufficient reason to modify Thrap ‘ 177 in view of Yang. Id. at 7. In response to Appellants’ arguments, the Examiner states that Thrap ‘ 177 is not relied upon for its disclosure of balancing cells by reallocating charge between the cells but for its disclosure of a balancing circuit structure and a heat sink. Ans. 2. The Examiner states that Yang is relied upon for its disclosure of a balancing circuit having a discharge resistor and that 5 Appeal 2017-004242 Application 13/412,157 modifying Thrap ‘177 in view of Yang would make the heat sink of Thrap ‘177 (i.e., interconnection 30) provide greater heat dissipation for the discharge resistors of Yang. Id. The Examiner finds that the principle of operation of Thrap ‘177 would not be changed because the method of balancing disclosed by Thrap ‘177 was not relied upon in the rejection. Id. After review of the opposing positions articulated by Appellants and the Examiner and the evidence of obviousness adduced by the Examiner, we determine that Appellants’ arguments are persuasive of reversible error in the Examiner’s obviousness rejection. The Examiner has not provided articulated reasoning with some rational underpinning to support a conclusion it would have been obvious to modify Thrap ‘ 177 in view of Yang. See KSRInt’l Co. v. Teleflex Inc., 550 U.S. 398, 418 (2007) (quoting In re Kahn, 441 F.3d 977, 988 (Fed. Cir. 2006). The Examiner’s findings and conclusions are insufficient to explain what proposed modification would have been made to the balancing circuit of Thrap ‘177 in view of Yang. For instance, the Examiner does not explain how the balancing circuits 32, 33, 35 of Thrap ‘177 would have been modified in view of Yang to include a discharge resistor so the balancing circuits are each “respectively connected to voltage terminals of a cell,” as recited in claim 1, instead of connected to one terminal of two different capacitors, as discussed above. Further, the Examiner does not explain how the balancing circuit and heat sink (i.e., interconnection 30) of Thrap ‘177 would be modified in view of Yang so the heat sink would provide greater heat dissipation for a discharge resistor. It is unclear from the record how such an effect would transpire. The Examiner concludes such a result would be achieved (Ans. 2) but does not support this conclusion with any 6 Appeal 2017-004242 Application 13/412,157 articulated reasoning to demonstrate how it would occur. Further, the Examiner’s conclusion that it would have been obvious to modify the balancing circuit of Thrap ‘177 in view of Yang so the balancing circuit is suitable for use in a vehicle (Final Act. 3 4) is also insufficient to explain the modifications proposed by the Examiner, especially in view of the disclosure by Thrap ‘177 that its device is designed for use in a vehicle. Thrap ‘177 1:55-58. Moreover, the Examiner’s obviousness rejection lacks sufficient articulated reasoning to explain why one of ordinary skill in the art would have made the modifications proposed by the Examiner, especially when one considers that the proposed modification would have resulted in a loss of the charge reallocation function disclosed by Thrap ‘177. “[CJombinations . . . that change . . . the basic principles under which the [prior art] was designed to operate,” In re Ratti, 270 F.2d 810, 813 (CCPA 1959), or that render the prior art “inoperable for its intended purpose,” In re Gordon, 733 F.2d 900, 902 (Fed. Cir. 1984), “may fail to support a conclusion of obviousness.” PI as-Pak Indus., Inc. v. Sulzer Mixpac AG, 600 F.App’x 755, 758 (Fed. Cir. 2015). The Examiner has not explained how modifying Thrap’s circuitry to take or incorporate Yang’s circuitry including resistor would not modify Thrap’s principle of operation. The Examiner merely states that the principle of operation of Thrap ‘177 regarding charge allocation would not have been changed because it was not relied upon in the rejection. Stating that the rejection does not rely on Thrap’s principle of charge allocation does not demonstrate that this principle of operation is not changed. Such a statement is contrary to the Examiner’s conclusion that it would have been 7 Appeal 2017-004242 Application 13/412,157 obvious “to take the teachings of Yang’s balancing circuitry which uses temperature dependent resistance to control current flow, and incorporate it into the balancing system of Thrap, and thereby balance the series capacitors for use in a vehicle.” Final Act. 4. Indeed, as Appellants contend, Thrap’s principle of operation depends on connecting the balancing circuitry to a terminal of each of two capacitors, whereas claim 1 requires each balancing circuit be connected to voltage terminals of a respective cells. In view of the above, the Examiner has not set forth a prima facie case of obviousness for claim 1 over Thrap ‘177 and Yang. In re Oetiker, 977 F.2d 1443, 1445 (Fed. Cir. 1992) (The Examiner “bears the initial burden ... of presenting a prima facie case of unpatentability.”). KSR Int’l Co. v. Teleflex Inc., 550 U.S. 398, 421 (2007) (citing Graham v. John Deere Co., 383 U.S. 1, 36 (1966) (Warning against a “temptation to read into the prior art the teachings of the invention in issue.”)). Like claim 1, independent claims 13 and 20—the only other independent claims—recite using balancing circuits connected to voltage terminals of a respective cell and thermally coupling all discharge resistors via a common heat sink on which the discharge resistors are mounted. For the reasons discussed above, the Examiner has not set forth a prima facie case of obviousness for claims 13 and 20 over the combination of Thrap ‘177, Yang, and Venzke. Claims 2, 11, 12, 14, 16—19, and 21 depend from claims 1 and 13. For these reasons, we cannot sustain the Examiner’s rejection of claims 1, 2, 11-14, and 16-21. 8 Appeal 2017-004242 Application 13/412,157 Rejection over Thrap ‘177, Yang, Venzke and Thrap’121 Claims 8 and 9 are rejected as being unpatentable under 35 U.S.C. § 103(a) over Thrap ‘177, Yang, and Venzke and further in view of Thrap ‘121. Because the Examiner has not established that all of the limitations of claim 1 are disclosed or would have been obvious based on Thrap ‘177, Yang, and Venzke, and Thrap ‘121 is not relied on to cure that deficiency, we also do not sustain the obviousness rejection of dependent claims 8 and 9 for the same reasons. NEW GROUND OF REJECTION Pursuant to our authority under 37 C.F.R. § 41.50(b), we enter the following new ground of rejection claims 1, 2, 8, 9, 11—14, 20 and 21 under 35 U.S.C. § 103(a) over Froeschl8 in view of Yang and Venzke. Rejection over Froeschl, Yang, and Venzke We find that Froeschl discloses an energy storage device including a cell stack having a plurality of cells (items la in Figures 1 and 2) connected in series and a plurality of balancing circuits (items 2 in Figures 1 and 2). Froeschl 1:4—5, 4:1—20. Each balancing circuit is respectively connected to voltage terminals of a cell. Id.', Fig. 1. Froeschl discloses that a balancing circuit is turned on when an upper reference voltage is exceeded (i.e., detecting when a defined voltage value for a respective cell is exceeded, as 8 Froeschl et al., WO 2007/104325 Al, published Sept. 20, 2007 (“Froeschl”). Citations to page and line numbers of Froeschl refer to a machine-prepared English language translation of Froeschl (obtained from the European Patent Office website), a copy of which is attached. We note Appellants disclose Froeschl in the Specification, paragraph 4. 9 Appeal 2017-004242 Application 13/412,157 recited in claim 13), which results in current flowing through a resistor 2g (i.e., discharge resistor, as recited in claims 1,13, and 20) until it falls below the upper reference voltage (i.e., discharging the respective cell via a discharge resistor, as recited in claims 13 and 21). Id. 5:16—25. Froeschl further discloses that the balancing circuits may be active-bypass balancing circuits, as recited in claims 8 and 9. Id. 2:31, 3:18—19. In addition, Froeschl discloses it is known to use double-layer capacitors for the cells of energy storage devices, as recited in claim 12. Id. 1:6—8. We find that the discharge resistor of Froeschl would have “a temperature dependent resistance characteristic,” as recited in claims 1,13, and 20, because this language encompasses the change in resistance that inherently occurs in resistors. Such a property is disclosed in paragraph 2 of Yang. With regard to a discharge resistor having a positive temperature coefficient characteristic, as recited in claims 2 and 14, Yang demonstrates the equivalence of using a resistor with a standard temperature coefficient characteristic, a positive temperature coefficient, or a negative temperature coefficient. Yang 3:32—37. Thus, it would have been obvious to one of ordinary skill in the art to replace the standard discharge resistor of Froeschl with one having a positive temperature coefficient based on the teachings of Yang. An express teaching need not be present in the art to support the substitution of one element for another element used for the same purpose. In reFout, 675 F.2d 297, 301 (CCPA 1982). We find that Froeschl does not disclose or suggest a common heat sink, as recited in claims 1, 11, 13, 20, and 21. However, Venzke discloses the use of a common heat sink (i.e., thermal linking agent 210, which can be 10 Appeal 2017-004242 Application 13/412,157 a common heat sink) upon which resistors (i.e., resistors 235, 240, 280, and 285) are mounted and by which they are thermally coupled. Venzke Tflf 20, 21, and Fig. 2. Venzke discloses that the common heat sink maintains the temperature of the resistors constant, which avoids problems due to changes in resistance of the resistors as their temperature changes. Id. 2, 10? and 21. Based on the foregoing, we conclude that it would have been obvious to one of ordinary skill in the art to modify the device of Froeschl to include a common heat sink so the discharge resistors of Froeschl are mounted upon and thermally coupled by the common heat sink, which permits the temperature of the discharge resistors to be controlled in order to avoid changes in resistor performance, as disclosed by Venzke. The structure of Froeschl, as modified in view of Venzke and evidenced by Yang, appears to be same or substantially similar to the structure used in the process of claim 13. Asa result, the as-modified device of Froeschl would necessarily result in a faster discharge of a group of cells, as recited in claim 13. When a claimed product appears to be substantially identical to a product disclosed by the prior art, the burden is on the Applicants to prove that the product of the prior art does not necessarily or inherently possess characteristics or properties attributed to the claimed product. In re Spada, 911 F.2d 705, 708 (Fed. Cir. 1990); In re Best, 562 F.2d 1252, 1255 (CCPA 1977). Claim 11 recites “wherein the cell stack comprises a plurality of groups of cells, each group of cells associated with a common heat sink.” This language encompasses a structure in which all cells of a device are associated with a single, common heat sink but the cells are arbitrarily 11 Appeal 2017-004242 Application 13/412,157 divided into groups upon the single substrate. Therefore, the as-modified device of Froeschl provides the limitations of claim 11. Claim 20 recites “wherein the common heat sink comprises a cooling capacity based on a predefined portion of the discharge resistors.” This language encompasses a predefined portion that includes all of the discharge resistors mounted to and thermally coupled by a common heat sink. It is reasonable that the common heat sink of Venzke would be designed to have a cooling capacity based upon all of the resistors mounted to it in order for the heat sink to perform its function of maintaining a constant temperature for the resistors. Therefore, the combination of Froeschl, as modified by Venzke and as evidenced by Yang provides the limitations of claim 20. Further, in light of the disclosure of Froeschl of detecting when a defined voltage value for a respective cell is exceeded and flowing current through a discharge resistor until it falls below the upper reference voltage (Froeschl 5:16—25) and the disclosure of a common heat sink by Venzke (Venzke 20, 21), the as-modified device of Froeschl provides the limitations of claim 21. DECISION On the record before us and for the reasons given in Appellants’ Appeal and Reply Briefs, we reverse the Examiner’s 35 U.S.C. § 103 rejections. We, however, enter a new ground of rejection under 35 U.S.C. 12 Appeal 2017-004242 Application 13/412,157 § 103 for claims 1, 2, 8, 9, 11—14, 20 and 21 over Froeschl in view of Yang and Venzke. RESPONSE This decision contains a NEW GROUND OF REJECTION pursuant to 37 C.F.R. § 41.50(b). This section provides that “[a] new ground of rejection . . . shall not be considered final for judicial review.” 37 C.F.R. § 41.50(b) also provides that the Appellants, WITHIN TWO MONTHS FROM THE DATE OF THE DECISION, must exercise one of the following two options with respect to the new ground of rejection to avoid termination of the appeal as to the rejected claims: (1) Reopen prosecution. Submit an appropriate amendment of the claims so rejected or new evidence relating to the claims so rejected, or both, and have the matter reconsidered by the examiner, in which event the proceeding will be remanded to the examiner. . . . (2) Request rehearing. Request that the proceeding be reheard under § 41.52 by the Board upon the same record .... No time period for taking any subsequent action in connection with this appeal may be extended under 37 C.F.R. § 1.136(a)(1). REVERSED: NEW GROUND OF REJECTION. 37 C.F.R, $ 41.50(b) 13 Application/Control No. Applicant(s)/Patent Under Patent Notice of References Cited 13/412,157 Appeal No. 2017-004242 Examiner Art Unit 2859 Page 1 of 1 U.S. PATENT DOCUMENTS * Document Number Country Code-Number-Kind Code Date MM-YYYY Name Classification A us- B us- C US- D US- E US- F US- G US- H US- 1 US- J US- K US- L US- M US- FOREIGN PATENT DOCUMENTS * Document Number Country Code-Number-Kind Code Date MM-YYYY Country Name Classification N W02007104325 Patent Translate O P Q R S T NON-PATENT DOCUMENTS * Include as applicable: Author, Title Date, Publisher, Edition or Volume, Pertinent Pages) U V w X *A copy of this reference is not being furnished with this Office action. (See MPEP § 707.05(a).) Dates in MM-YYYY format are publication dates. Classifications may be US or foreign. U.S. Patent and Trademark Office PTO-892 (Rev. 01-2001) Notice of References Cited Part of Paper No. Patent Translate Powered fey EPO and Google Notice This translation is; machine-generated. it cannot be guaranteed that it it; intelligible, accurate, co-ngie-e, reliable or fit for specific purposes;. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. D 102007104325 Energy storage diagnostic circuit T he invention relates to an energy storage diagnostic circuit for & ceii group in a ceil network of an energy store, in porticuior an energy store in a motor vehicle electrical system. The invention further relates to e method for regenerating a ceii group of an energy store which consists of ceii groups connected in series. in the automotive sector, more and more energy storage devices constructed from single ceils are used, preferably energy storage devices constructed from double-layer capacitors. These double layer capacitors have the advantage of providing and storing energy that they can provide high power m the short term. In order to come to the need in a motor vehicle supply voltage, the individual double-layer capacitors must be connected in series. life series connected cells thus form a cell network. For charging, for balancing the ceii voltage, for detecting under- and overvoltage of individual cells, for maintaining the charge of the cells in stand-by mode, for charging and discharging Reloading between the individual ceils as well as for diagnosing / monitoring the Individual cells monitors Individual cells or groups of ceils, it is known that for this cell group logic is provided, which are each connected to a cell group to monitor their voltage and i or to control or regulate. A cell group can also consist only of a single cell. So that the cell voltages of the Individual cells or Cell groups do not diverge during cyclic loading or unloading, it is known that ceii group logic by means of a higher-level control device, eg . As a central logic, and to control so that a uniform charging and / or discharging is achieved, whereby a long life of the individual cells and thus the entire ceil network can be achieved. From DE 100 99 407 A1 a balancing circuit for series-connected electrical energy storage elements is further known which prevents overcharging of the energy storage elements by means of relatively little effort. Here, each Energiespelchereiement is provided with a bypass circuit for limiting the charging voltage, which contains a powered by the energy storage element, voltage-controlled current source for generating a bypass current. The bypass circuit thus Increases from a preset value for the rated voltage to an Increasing proportion of the charging current end thus protects the respective energy storage element against overloading, A disadvantage of this compared to the previously described ceil group logic In terms of manufacturing cost very cheap solution is that no diagnostic function Is provided. The object of the invention is to provide a simply constructed energy storage diagnostic circuit for a ceii group in a cell network of an energy storage device and a method for regenerating an array of ceils connected In series cell network of an energy storage based on the executed by the energy storage diagnostic circuit diagnosis. This object is achieved according to the invention by an energy storage diagnosis circuit according to patent claim 1 and a method for the regeneration of a cell group consisting of series cell groups of an energy store according to patent claim 6. The Inventive energy storage diagnostic circuit for a group of ceils In a cell network of an energy storage, In particular an energy storage in a motor vehicle electrical system, wherein the energy storage diagnostic circuit Is connected to voltage terminals of the ceil group, characterised in that the energy storage diagnostic circuit, if one to the Voltage terminals of the cel! group voltage applied ceil group voltage exceeds a first threshold level and / or if the cell group voltage falls Peiow a second threshold level, a certain voltage level and / or current Impressed on a diagnostic rail, via which at least one monitored operating parameters of the cell group and / or the cell group can be queried , In this case, when the cell group voltage is exceeded or fallen below, the same level is impressed on the diagnostic rail, but different levels con also be Impressed . The cell groups can each also consist of a single cell. The Impressed voltage level or In this case, current can be regarded as a flag set on the diagnostic rail tor exceeding or falling below or respectively for exceeding and falling below. The diagnostic rail here preferably consists of a line end ground. However, as a diagnostic rail, it is also possible to provide a plurality of lines or a plurality of lines and ground. In this case, z, B. when the cell group voltage Is exceeded, a certain voltage level or current are Impressed on a line and falls below the one or another particular voltage level or current can be impressed on another line. Further, more Information can be transmitted about the level of the particular voltage level or current or about a frequency modulation or pulse width modulation, z. Example, the number of cells of the cell network and / or the number of ceils of a cell group arid / or an Identifier of a cell or cell group with Untsrbzw. Overvoltage arid / or If there is an under or exceeding the cell group voltage. The method according to the Invention for regenerating a cell group of an energy store consisting of series-connected ceil groups by means of energy storage diagnosis circuits which are connected to the cell groups, wherein each energy storage diagnosis circuit outputs a flag in the presence of an overvoltage or an undervoltage of the cell group connected thereto comprises the following Steps: a) detecting the presence of at least one flag, b} assessing whether there Is an overvoltage or undervoltage end setting a flag for the presence of over or under voltage, c) checking whether only overvoltages or only undervoltages have occurred, d) there are only overvoltages or only Undervoltage, check whether there Is still a flag; If no flag is present, start a regeneration; when a flag Is present, checking for a defect, starting a regeneration in case of no defect arid starting an emergency procedure In the event of a defect, and e) there are overvoltages and undervoltages, controlling the voltage of the cell assembly to a certain voltage, checking If still a flag is present; if no flag is present, start a regeneration: when a flag Is present, start an emergency procedure. The method according to the invention therefore offers, in connection with the energy storage diagnostic circuit: according to the Invention, the possihility of detecting defects In the ceil network of an energy store and, depending on this, starting a regeneration or an emergency procedure. This offers over the prior art with insignificantly increased hardware complexity Improved charge retention end symmetrization of the Individual cells of the cell assembly, whereby an Increased life cf the entire cell assembly is achieved. The dependent claims show advantageous developments of the defined In claim 1 energy storage diagnostic circuit and the method defined In claim 6 for the regeneration of an interconnected from cell groups cell group of an energy storage means of energy storage diagnostic circuits. Advantageously, the inventive energy storage diagnostic circuit Is Integrated in an active-bypass baiancing circuit in this case, essential circuit elements of the inventive energy storage diagnostic circuit car; be formed by the active-bypass balancing circuit, here In particular a comparator and a circuit part for forming a threshold level. In the energy storage diagnosis circuit according to the invention, the first threshold level and / or the second threshold level are advantageously obtained from the cell group pairing. Alternatively; these are advantageously obtained from a voltage applied to the diagnostic rail auxiliary voltage. According to the invention, at least the temperature of at least one cell group or of the ceil group is advantageously Interrogated via the diagnostic rail as a monitored operating parameter of the cell group and / or of the cell group. Thus, according to the Invention, an active-bypass balancing circuit used Is preferably expanded by a diagnostic function, and the diagnosis result is output to a diagnostic rail present in the cell network. The Inventive energy storage diagnostic circuit thus provides a minimum diagnosis for memory modules, the evaluation of the diagnostic result on the diagnostic rail preferably outside or If necessary also within the memory module, in particular by a control unit with a microprocessor. The inventive method for regenerating the cell network, the diagnostic result of the Inventive energy storage diagnostic circuit Is evaluated and processed so that a diagnostic-dependent regeneration takes place, the regeneration per se preferably by means of active- bypass balancing circuits for the ceil groups of the cell network. As stated above, a cell group may consist of only a single cell. in the method according to the invention, the following steps are preferably carried out In order to check whether a defect exists In step d): d 1) in the event of overvoltages, lowering the voltage of the cell assembly and checking whether the currently applied flag falls before the voltage of the cell group has fallen below a first critical value; if this Is the case, if there Is no defect, this Is not the case, there is a defect, and d2) in the case of toe presence of undervoltages, raising the voltage of the ceil assembly and checking whether the currently applied flag fails before the voltage of the call assembly has riser: above a second critical value; if this is the case, there Is no defect, If this is not the case, there Is a defect. The evaluation In step b), whether an overvoltage or undervoltage is present, is preferably carried out according to the Invention by the following steps: bl) determining an overvoltage, if a flag is present and the voltage of the cell network is above a first voltage threshold, arid b2) detecting art undervoltage, if there is a flag arid tine voltage of the cell network Is below the first voltage threshold. Alternatively, in order to evaluate whether an overvoltage or an undervoltage exists, in step b) a voltage or current level of a flag and / or lines on which flags may occur is checked. The emergency procedure according to the Invention preferably includes the following steps: nl) Loading the cell network with a charging current that is less than one Balancing current, and n2) Check if there Is still a Flag: If this is not the case, start the regeneration; if this Is the case, performing step n2) until the Voltage of the line network has increased to a maximum voltage for a first predetermined period of time, then outputting a message via a Malfunction, The emergency procedure according to the Invention preferably further includes the following step: n3) Checking whether at least: one balancing circuit lor a cell group of the cell network is defective by checking whether the current flowing into the cell network is lower by at least once the balancing current than by one observed Voltage Increase of the cell group In this flowing calculated current, and output a corresponding error message, if this is not the case. For the regeneration, which preferably fakes place according to the invention by means of active-bypass balancing circuits, the following steps are preferably carried out by the process according to the Invention: M) raising the voltage of the cell network, r2) checking that the voltage of the cell network has not yet risen to a maximum voltage and no flag appears, this is not satisfied, repeating steps rl) and r2); if the voltage of the cell network has risen to the maximum voltage, stopping the regeneration; a flag appears raising the voltage of the cell assembly until a highest: voltage of a cell group Is at its maximum voltage, the voltage of the ceil group rising to its maximum voltage Cel! boundary Is limited to the maximum voltage, and checking whether the flag falls within a second predetermined period of time: If so, repeating steps rl) and r2); if this Is not the case, output an error message indicating that there is an error in the balancing. The method according to the invention preferably comprises the steps: f) requesting an amount of energy necessary for the regeneration, g) detecting a release of the required amount of energy required, h) until the release is obtained, further carrying out steps b), f) and g). In the method according to the invention, preferably the specific voltage to which the voltage of the cell assembly is regulated In step e) is half the rated voltage (U Mom) of the ceil network or half the voltage between a voltage above which an undervoitage exists and a voltage which is an overvoltage. For the method according to the invention, an energy storage diagnostic circuit according to the invention as described above is preferably used. Further details, advantages and features of the present Invention will become apparent from the ioiiowing description of exemplary embodiments with reference to the drawing. Straw it: 1 Is a schematic diagram of a first preferred embodiment of the inventive energy storage diagnostic circuit, 2 shows an overall view of a second embodiment of an energy store with energy storage diagnosis circuits, a circuit for a temperature measurement and an evaluation circuit, 3 shows a second preferred embodiment: of the energy storage diagnosis circuit according to the invention from the overall view shown in FIG. 2, 4 shows a circuit for the temperature measurement from the overall view shown in FIG. 2, FIG. 5 is an evaluation circuit of the overall view shown In FIG. 2, 6 shows an overview of the regeneration algorithm used according to the Invention in a preferred embodiment Voltage thresholds, FIGS. 7a to 7c show a flow chart of the regeneration algorithm according to the invention In a preferred embodiment, and FIGS 8 shows an active-bypass balancing circuit according to the prior art. 1 shows a first preferred embodiment of an inventive energy storage diagnostic circuit, 2 By way of example, the energy storage diagnosis circuit is designed here only for a single cell la of a cell assembly 1 which orders from two Individual cells la, 1b. For this purpose, a positive connection of the Individual cell la to a first input 2v of the energy storage diagnosis circuit 2 and a negative connection of the individual line la to a second input 2w of the energy storage diagnosis circuit 2 are connected. Furthermore, a first output 2 x of the energy storage diagnosis circuit 2 with a positive terminal of a diagnostic rail 3 and a second output 2 y of the energy storage diagnosis circuit 2 are connected to a negative terminal of the diagnostic rail 3, Between the positive terminal and the negative terminal of the diagnostic rail 3, a temperature measuring circuit 4 is connected, with the aid of which the temperature of the ceii assembly 1 can be determined. The energy storage diagnosis circuit 2 Is shown for simplicity only for a single ceii 1 a of the ceii assembly 1, In a specific embodiment, for each of the series-connected individual cells la, 1b of the ceil group 1 or ter series-connected Individual cells In turn connected in series cell groups of the cell composite 1 in the same way to the single cell or the cell group and the diagnostic Ral (3 connected energy-saving diagnostic circuit 2 provided. The energy storage diagnosis circuit 2 shown In FIG. 1 in the first preferred embodiment according to the Invention comprises a series connection of a first resistor 2a, a second resistor 2b and a third resistor 2c connected between its first input 2v and its second input 2w. The node between the first resistor 2a and the second resistor 2b is connected to a first input of a first comparator 2d, at the second input of which a high reference voltage is applied. The node between the second resistor 2b and the third resistor 2c is connected to a first input of a second comparator 2e, to the second input of which a low reference voltage is applied. The first comparator 2d and the second comparator 2e may be formed by a 2-fold operational amplifier. The output of the first comparator 2d is connected to the base of a first NPN transistor 2f whose emitter Is connected to the second input 2w and whose collector via a fourth resistor 2g to the first input: 2v of the energy storage diagnostic circuit 2. The output of the second comparator 2e Is connected via a fifth resistor 2h to the base of a second NPN transistor 2k whose emitter is connected to the second output 2y and wnose collector is connected to the first output 2x of the energy storage diagnosis circuit 2. At: the base of the second NPN transistor 2k, the output of the first comparator 2d and directly the cathode of a Zener diode 21 are connected via a sixth resistor 21, the anode of which is connected to the second output 2y of the energy storage diagnosis circuit 2. The first NPN transistor 2f and the second NPN transistor 2k each form a controlled switch. Beyond the function of the known active-bypass balancing shown in Fig. 8, with a voltage equalization among the individual cells or 1, the diagnostic rail 3 is short-circuited when the first NPN transistor 2f for the active bypass Is turned on, le when the high reference voltage is exceeded by the voltage applied to the first Input of the first comparator 2e and when the voltage applied to the first input of the second comparator 2e drops below the voltage applied to its second Input low reference voltage. If the negative terminal of the diagnostic rail 3 Is grounded and an external pull-up resistor is connected to the positive terminal of the diagnostic rail 3, temperature information can be interrogated at the positive terminal of the diagnostic rail 3 If the cell voltage of the Single cell la Is in its normal range, is. between the low reference voltage and the high reference voltage, whereas the positive terminal of the DiagnoseRaii 3 is also pulled to ground when the ceil voltage falls below the low reference voltage or exceeds the high reference voltage. When the upper reference voltage is exceeded by the cell voltage, the balancing Is simultaneously active, wnereby the single cell 1 a Is discharged or a charging current can flow past this. FIG. 2 shows the overall structure of a cell assembly 1 consisting of eight individual cells, wherein, as in the previously described embodiment, an individual cell may also consist of a ceil group. in Fig. 2 of Fig, 1 corresponding assemblies are designated by the same reference numerals. In addition to the illustration in FIG. 1, an evaluation circuit 5 Is likewise shown here, which is connected to the positive line of the diagnostic rail 3 with a first Input 5! and to the negative line of the diagnostic rail 3 with a second input 5k. on which also bears ground and which Is further connected to the negative terminal of the cell assembly 1. FIG. 3 shows a second preferred embodiment of an energy storage diagnosis circuit 2 according to the invention from tire overaii structure shown In FIG, 2 In detail. The same components or components with the same function shown in Fig. 1 are given the same reference numerals. Here, the switch 2f consisting of an NPN transistor In the first embodiment consists of a normaiiy-off N-channei MOS-FET whose drain-source path Is connected in series with the fourth resistor 2g between the first Input 2v and the second input 2w, wherein the fourth resistor 2g is connected to the first Input 2v and a diode Is connected between the drain and the source of the N-channel NiOSFET the anode of which Is connected to the second Input 2w of the energy storage diagnostic circuit 2 and the cathode of which is connected to the fourth resistor 2g, This switch 2f is driven by the first comparator 2d via a seventh resistor 21, and an eighth resistor 2m is arranged between the gate and source of the N- channel MOSFETs. The first Input 2v of the energy storage diagnostic circuit 2 Is directly connected to the first (non-inverting) input of the first comparator 20 and the first (Inverting) input: of the second comparator 2e. About: the first output 2x and the second output 2y of the energy storage diagnostic circuit 2, this is supplied to an auxiliary voltage which is greater than the highest voltage to be reached of the cel! network. Via a ninth resistor 2n, which is connected In series with a first diode 20, the cathode of the first diode 20 being connected to the ninth resistor 2n, and the series circuit consisting of the ninth resistor 2n and the first diode 20 being connected between the second input 2w and the first output is switched twice, that the anode oi the first diode 20 is connected to the second input 2w, a stabie voitage is generated which is independent of the voltage difference between the first output 2x and the second input 2w, By means of a voltage divider composed of a series connection of a tenth resistor 2r and an eleventh resistor 2s, which is connected in parallel to the first diode 20, a reference voitage dimensioned to a desired value is obtained, which is applied to the second (inverting) input of the first comparator 2d That is, the node between the tenth resistor 2r and the eieventh resistor 2s is connected to the second input of the first comparator 2d, Via a series circuit consisting of a twelfth resistor 2t and a second diode 2q whose anode is connected to the twelfth resistor 2p and whose cathode is connected to the second input 2w. this series connection between the first output 2x and the second input 2w is connected, a lower reference voltage is generated, which is supplied to the second (non-inverting) input of the second comparator 2e, le, the node between the twelfth resistor 2p and the anode of the second diode 2q is connected to the second input of the second comparator 2e connected. The output of the second comparator 2e is connected to the second output 2y via a thirteenth resistor 2i, and the output of the first comparator 2d is also connected to the second output 2y via a fourteenth resistor 2u. By the described energy storage diagnostic circuit 2 of the second preferred embodiment, the balancing is turned on when the upper reference voitage is exceeded, whereby the first comparator 2d switches its output to the positive voltage applied to the first output 2x, since the first comparator of this auxiliary voltage with voltage is supplied. As a result, a gate-source voitage Is produced at the switch 2f via the voitage divider consisting of the seventh resistor 21 and the eighth resistor 2m, with which it is switched through. With the switching through, the symmetrizing current flows via the fourth resistor 2g until it fells below the upper reference voitage again. The high potential at the output of the first comparator 2d causes a certain current to flow through the fourteenth resistor 2u, which supplements the quiescent current of the auxiliary supply. This current difference can be detected by the evaluation circuit described below, if the lower reference voltage Is undershot, the second comparator 2e switches its output to the high potential oi the auxiliary supply, since the second comparator 2e is also supplied by the auxiliary supply. The high potential at the output of the second comparator 2e causes a certain current to flow through the thirteenth resistor 2r, which complements the quiescent current of the auxiliary supply. The evaluation circuit described below can detect this current difference, FIG. 4 shows an embodiment of the temperature measuring circuit 4 shown In FIG. 2 in detail. This circuit is a temperature- dependent oscillator, A third comparator 4b, which is supplied via the connected to the diagnostic rail 3 inputs 4b, 4! of the temperature measuring circuit 4 with voltage, is connected to its first (non-inverting) input to a reference voltage, which by means of one of a series circuit of a fifteenth Resistor 4c and a sixteenth resistor 4d existing voitage divider is obtained, which is also connected between the two inputs 4h; 4! of the Temperaiurmessschaitung 4. This reference voltage is influenced by a seventeenth resistor 4f connected between the output of the third comparator 4b and its first input This sets a hysteresis, A temperature-dependent resistor 4 a connected between the output of the third comparator 4 b and its second (inverting) input and a capacitor 4 e connected between the second input of the third comparator 4 b and the second input 4 i oi the temperature measuring circuit 4, le, ground, have the time constant of Oscillator arid thus adjusted its Osziliatorfrequenz. The change in the temperature-dependent resistance thus influences the oscillator frequency With the switching of the third comparator 4b, due to an eighteenth resistor 4g connected between its output and the second input 4! of the temperature measuring circuit 4, the supply current changes, whereby the temperature at the temperature-dependent resistor can be detected. FIG. 5 shows the evaluation circuit 5 shown in FIG. 2 in detail. This also contains the auxiliary supply 51 with a voitage that is greater than the highest zuerrelchende voitage of the cell network. Powered by this auxiliary supply 5! is a fourth comparator 5a, between whose output and the second input 5k of the evaluation circuit 5, i.e., ground, a voitage divider consisting of a series connection of a nineteenth resistor 5g and a twentieth resistor 5h is connected. Via this, the height of the output signal of the evaluation circuit 5 tapped at the node between the nineteenth resistor 5g and the twentieth resistor 5h can be adjusted. The first input 5j of the evaluation circuit 5 is connected to the positive terminal of the auxiliary power supply 51 via a twenty-first resistor 5c, Between the positive terminal and the negative terminal of the auxiliary supply 51, there Is further connected a voitage divider composed of a series circuit of a twenty-second resistor 5 / 2 C [maximum voltage U FiagO] <2> P Symm - U. . FiagO <2> / R By choosing the minimum balancing power (lower voltage), a conservative design was chosen, but t Krit could also be chosen significantly larger, t KritNot Time that may be required In the emergency algorithm to clear all flags while holding UJvlax; otherwise stack defective! Maximum voltage Rated voltage of the individual cells The relative position of the individual voltage thresholds is likewise shown in RIG. 6. Here if can be seen that UJMenn> U_GrenzO> UJviax> U GrenzU. Alone with the information that one of the individual cells of the cell network leaves the permitted voltage range, the method according to the invention can bring about a voltage equalization under the Individual cells of the cell network. For this purpose, an inventive energy storage diagnostic circuit with active-bypass circuit is used. The power converted by this balancing circuit corresponds to P := U <2> / R, so It Increases quadratlcally with the voltage. It follows that the Symmeirlsrvorgang runs faster at higher cell voltages. The voltage equalization ensures that the voltages of the Individual cells are as identical as possible. This results In a maximum usable voltage swing of the cell network, which is limited by the uppermost or lowest cell voltage. If at least one cell voltage of an individual ceil loaves the voltage range bounded by U FiagO and U FlagU, the energy storage diagnosis circuit according to the invention provides a flag. The triggering of the flag by extremely brief over or under voltages or noise is precluded by a time filter (not shown) to be sized. If the voltage of the cell group U Stack is at the same time above an applicable voltage threshold (U-threshold), then It is assumed that the flag was triggered by overvoltage. If the volfage of the cell group U Stack is below the applicable voltage threshold U shaft, then undervoltage is assumed. Since the triggering voltage for the flag is below the maximum voltage or above the minimum voltage of the cell, the cells would be at symmetrical voltage distribution in the cell network before reaching the rated voltage, le, n times the maximum voltage, or the minimum voltage, la, 0 V, the Trigger voltage overbzw, below. An under / overvoltage of a single ceil and thus the starting condition for the actual regeneration of the inventive regeneration process Is thus present only if the voltage of the cell network is below or above the n-foid tripping voltage (U GrenzO / U GrenzU) and a flag appears, where n the number of single cells in the cell composite is. When a flag occurs, a corresponding flag Is first set, Indicating that a Oberbzw. Undervoltage has occurred. At the same time, this flag Is used to request that the amount of energy / battery charge required for the regeneration in energy management be maintained. The actual regeneration takes place only when the corresponding release from the system network, that is, the condition Start Algorithmus, is given. This Is the case as soon as the system is idle and enough charge is available In the battery. Without release, the monitoring of the cell voltages continues, occurring flags are stored. This gathers Information about how often voltage deviations occur and whether there are both low and high voltages. On receipt of the release, a distinction Is made as to whether only under or only overvoltages occurred during operation, if this is the case, it is checked whether there is still a flag. If not, the actual regeneration of the cell network can be started. if a flag Is present, the voltage of the ceil network is lowered in the event of overvoltage. If the flag does not drop before the voltage drops below a critical value (U KritU). the possibility of a defect of the single-cell triggering the flag or Its balancing cvcuk, le the energy storage diagnosis circuit according to the Invention, is taken Into consideration, and the later described emergency Algorithm started. It the flag tails, then the actual regeneration can be started. The procedure Is analogous when only undervoltages nave occurred. The voltage Is raised until a possibly existing flag falls. If this does not happen before U KrlfO is reached, It also switches to the emergency algorithm. If it comes during operation to both over and under voltages, so the voltage of the cell assembly is first controlled to a certain voltage, for example, half the rated voltage. If the currently existing flag drops off as a result, then regeneration can be started. If a flag remains at medium voltage, no Information regarding the nature of the problem is available any more. The following are possible: undervoltage, overvoltage, undervoitage and overvoltage at the same time or a hardware error. Nevertheless, to be able to bring about a voltage equalization, an emergency algorithm is executed. Since it is not known at first whether cells are In a voltage range in which their balancing Is already active, and whether all symmetries work, It is not easy to increase the voltage of the cell network. The cell network Is now charged so that the charging current is lower than the Symmetrierstrom, This ensures that, in the case of cells with high voltage, functioning symmetry provided, the voltage does not increase further. Low voltage cells are charged by the low current, their voltage increases. Should this drop all existing flags, the norma! regeneration algorithm is changed. If the voltage rises to U __Max (termination condition of the actual regeneration) and at least one flag remains set, it is kept constant at U Jviax. If the flag does not fall within TKritNot, there is a defect in the cel! group and a corresponding message Is output. Defective balancing can he detected by observing the increase in voltage rise. With I - C-dU / dt, the current flowing in the cel! network car: be calculated. On the assumption that no cel! Is reversed at tine voltage of the cel! network of U Norn / 2, Le,, the lowest cell voltage is at least 0 V. no undervoitage flag should be applied when the voltage is increased by n-U FlagU + safety distance. It follows that at least one cel! must have overvoltage and therefore at least one balancing must be active. Thus, the calculated current that charges the cel! network should be at least once lower than the current flowing In the cel! network. If this Is not the case, it must he assumed that at least one balancing Is defective. Before the actual regeneration algorithm was started, it was ensured that there was no cell voltage above UJFIsgO. Now the voltage can be raised without running the risk of damaging one of the single cells. It the target voltage U_Max to be determined is reached with the voltage of the cell network before a flag appears, no further regeneration of the cel! network is necessary. The termination condition of the actual regeneration is fulfilled. The target voltage depends on the maximum voltage of the cell network to reach, hut it can not exceed U GrenzO, as flags must appear above it. If a flag appears, the voltage of the cell network Is raised so far that the highest cell voltage is as close as possible to the maximum voltage, since the voltage equalization, as mentioned earlier, occurs fester at higher voltage. To achieve this, a required differential voltage Li d is set. Theoretically, it corresponds to n times the difference between the tripping voltage (Li FlagO) and the maximum voltage of the line. For reasons of tolerance consideration, measurement and component accuracies must still be considered In order to nave a certain safety distance and thus rule out exceeding the maximum voltage. The voltage boost is limited to U nom. if the flag falls due to the symmetrization. another pass of the actual regeneration algorithm is started until UJVlax Is reached, if the flag does not tali within T_Krit, there Is an error in the symmetrization, the actual regeneration is aborted and a corresponding error message is output. FIGS. 7a to 7c show the same preferred embodiment of the method according to the invention in the flow chart. After the method has been started In a first step SI, it is cheeked in a second step S2 whether a flag is present. If this is not the case, then the second step S2 is executed again. If a flag Is present in the second step S2, It is checked in a third step S3 whether the voltage of the cell network is above the threshold for the voltage of the cel! network, starting from which an overvoltage Is assumed. If this is the ease, it Is checked in a fourth step S4 whether the voltage of the cel! network Is smaller than an upper voltage threshold, above which a flag also occurs In the balanced state. If this Is not the case, the system branches again to the second step S2. It this is the case, a flag is stored In a fifth step S5 that an overvoltage is present. However, if it Is determined In the third step S3 that the voltage of the cell network is not above the threshold for the voltage of the cel! network from which ar: overvoltage is assumed, then a sixth step S6 is carried out, in which it is checked whether the voltage of the cel! network is greater than a lower voltage threshold, from which a flag also occurs In a balanced state. Sf this Is not toe csss, the system branches again to the second step S2, If this Is the case, then a seventh step S7 Is executed, In which a flag is stored, that an undervoltage Is present. After the fifth step S5 or the seventh step S7, If Is checked In an eighth step S8 whether there Is a release of the actual regeneration from the system network, if this Is not the case, the system branches again to the second step S2, If this Is the case, it is checked In a ninth step S9 whether overvoltages and undervoltages are present. If this Is not the case, i.e., there are only overvoltages or only ondervoltages, it is checked In a tenth step S10 whether there are only overvoltages. If this is not the case, an algorithm for under-voltages is started In an eleventh step S11. If this is the case, an overvoltage algorithm Is started In a twelfth step SI 2. However, if overvoltages and undervoiiages are detected In the ninth step S9. then In a thirteenth step SI 3 tine voltage of the cell network Is regulated to half the rated voltage. Subsequently, it is checked In a fourteenth step SI4 whether there is still a flag. If this is not the case, the normal regeneration algorithm is started in a fifteenth step SI 5. ft this is the case, the emergency algorithm described above and shown In FIG. 7c Is executed In a sixteenth step SI6. ft the algorithm for undervoltage is started in the eleventh step S11, it is then checked In a seventeenth step SI 7 whether there Is still a flag. ft tills is not the case, the system branches to the fifteenth step SI 5, In which the actual regeneration algorithm Is started. If this Is the case, then In an eighteenth step SI 8 the voltage of the cell network is increased. Subsequently, in a nineteenth step SI9, a query Is made as to whether the voltage of the cell network Is greater than a critical upper voltage at which, If an opposing flag Is still present here a flag for one Undervolfage, a fault must: be assumed, if this Is the case, a detect is displayed in a subsequent twentieth step S20 and then branched to the sixteenth step Si 6, in which the emergency algorithm is started, if it Is not found in the nineteenth step SI 9 that the voltage of the Cell compound Is greater than the upper critical stress, it Is branched into the seventeenth step SI 7. If the algorithm for overvoltage Is started In the twelfth step SI 2, then in a subsequent, twenty-first step S21 If is checked whether there is still a flag. If this is not tine case, the system branches to the fifteenth step SI 5, In which tine actual regeneration algorithm is started. If this Is not the case, then in a twenty-second step S22 the voltage of the cell network is lowered, after which it is checked In a twenty-third step S23 whether the voltage of the cell network Is less than a lower critical voltage, below which It is In the presence of an opposite flag, ie, an overvoltage flag, an error has to be assumed, ft this is tbe case, a defect Is displayed In a twenty-fourth step S24 before branching to the sixteenth step SI6, In which the emergency algorithm Is started. If it Is not determined in the twenty-third step S23 that the voltage of the cell assembly is smaller than the lower critical voltage, the process branches again to the twenty-first step S21. If, at the fifteenth step SI5, the actual regeneration algorithm, that is, regeneration of the cell cluster is started, then In a subsequent twenty-fifth step S25, the voltage of the cell cluster Is Increased. Thereafter, in a twenty-sixth step S26, It Is checked whether the voltage of the cell network is smaller than the target voltage. If this is not the case, then the twenty-fifth step S25 is executed again. If this Is the case, It Is checked In a twenty-seventh step S27 whether there is a flag. If this Is not the oase. the system branches again to the twenty-fifth step S25. If this is the case, It is checked In a twenty-eighth step S28 whether the voltage of the cell combination plus the differential voltage is less than the nominal voltage, ft this Is the case, in a twenty-ninth step S29 the voltage of the cell network Is set equal to the voltage of the cell network plus the differential voltage. Thereafter, In a thirtieth step S30, If is checked If there Is a flag. If this is not: the case, the system branches again to the twenty-fifth step S25. If this is the case, it Is checked In a thirty-first step whether a time that has elapsed since the execution of the twenty-ninth step S29 Is greater than a time which may require the lowering of all the upper cell voltages below U FiagC) maximum before it must be assumed that there Is a faulty balancing , If this is not the case, the system branches again to the thirtieth step S30. If this is the case, It Is Indicated In a thirty-fifth step S35 that a symmetrization is defective. If If is determined In the twenty-eighth step S28 that the voltage of the cell group plus the differential voltage is not smaller than the rated voltage, then in a thirty-second step S32, the voltage of the cell group is set equal to the rated voltage. Thereafter, in a thirty-third step S33, It Is checked whether there Is a flag. If this is not the case, then the 25th step S25 is executed again. If this Is the case, It Is checked in a thirty-fourth step S34 whether a time since the execution of the thirty-second step S32 Is greater than the time that may be required to tower all upper cell voltages below U FlagO maximum before starting from a faulty balancing , If this is not the case, the system branches again to the thirty-third step S33. If this Is the case, the thirty-fifth step S35 already described above is executed. ft it Is determined In the twenty-sixth step S26 that the voltage of the cell network is not smaller than the target voltage, the actual regeneration is terminated In a thirty-sixth step S36. Thereafter, the regeneration process according to the invention, starting at the first step SI, is carried out again. If the emergency algorithm is started in the sixteenth step SI 6, then in a subsequent: thirty-seventh step S3? the charging current i load Is set to be less than or equal to the balancing current ! Symm. Thereafter, It Is checked in a thirty-eighth step S38 whether there is still a flag. If this is not the case, the actual regeneration algorithm is started, that is, branched to the fifteenth step SI 5. If there is a flag in the thirty-eighth step S38, It Is checked in a thirty-ninth step S39 whether the stack voltage U Stack Is greater than or equal to the target voltage U Max. If this is not the '-o 'hen the thirty-eighth step S38 Is executed again. If this is the case, a fortieth step S40 Is earned out, in which the stack voltage Is kept constant. Thereafter, in a forty-first step S41, it is checked if there Is a flag. If this is not the case, the actual regeneration algorithm Is started, that is, branched to the fifteenth step SI 5, If there is a flag In the forty-first step S41, however, a forty-second step S42 Is executed, In which it is checked whether a critical time of the emergency algorithm t KntNof has elapsed since the occurrence of the flag in the forty-first step S41. if this is not the case, then the forty-first step S41 Is executed again. If this is the case, then there Is a defect of the cell network and In a subsequent step S43 a message is issued that there is a defect. In an energy storage diagnostic circuit for a ceil group in a cell network of an energy storage, in particular an energy storage In a motor vehicle electrical system, wherein the energy storage diagnostic circuit Is connected to voltage terminals of Zeligruppe, so a certain voltage level! and / or current Impressed on a diagnostic rail, via which at least one monitored operating parameter of the cell group and / or the cell network can be queried when a voltage applied to the voltage terminals of the cell group cell group voltage exceeds a first threshold level and / or If the cell group voltage is a second threshold level below. Based on such flags, a regeneration process Is then performed to discriminate whether or not there is a defect. Copy with citationCopy as parenthetical citation