Battery management system

Abstract

A battery management system (10) is provided with inspection devices (411, 412, 421, 422), a first database, a second database, and a central management device (20). The inspection devices (411, 412, 421, 422) measure an SOC-OCV property of a battery module, and generate the results of inspecting the usage state of the battery module that includes the SOC-OCV property. The first database stores the results of inspecting the usage states of batteries from the inspection devices. The second database stores quality information at the time of manufacture of battery cells used in the battery modules. The central management device (20) is able to access the first database and the second database. The central management device (20) analyzes degrees of degradation of the battery modules from the SOC-OCV properties, and generates and stores defect information about batteries on the basis of the results of analyzing the degrees of degradation, the results of inspecting the usage states, and the quality information. The central management device (20) acquires the quality information of the battery cells from the second database if there has been determined, from the results of analyzing the degrees of degradation, to be a defect caused by quality at the time of manufacture of the battery cells. The central management device (20) notifies the first database about those contents, of the defect information, that are related to the quality information, and notifies the inspection devices of the results of analyzing the degrees of degradation.

Description

Battery Management System

[0001] The present invention relates to a system for managing everything from analysis to notification when a storage battery malfunction is reported by a user.

[0002] Patent Document 1 describes a diagnostic system for lithium-ion secondary batteries. The diagnostic system of Patent Document 1 collects quality information in the manufacturing process of lithium-ion secondary batteries and stores it in a database. The diagnostic system of Patent Document 1 also collects operational performance information of lithium-ion secondary battery modules in use and stores it in a database.

[0003] The diagnostic system of Patent Document 1 monitors operational records, and when an abnormality occurs, it determines whether the cause of the abnormality is a manufacturing factor or a use environment factor, and creates a diagnostic report.

[0004] JP 2011-100691 A

[0005] However, the diagnostic system in Patent Document 1 is a system that manages the entire process from the manufacture to the operation of the battery module. Therefore, if the manufacturer that manufactures the battery module is different from the manufacturer that sells the product equipped with the battery module, it is difficult to apply the diagnostic system in Patent Document 1.

[0006] Furthermore, the diagnostic system of Patent Document 1 determines the malfunction without analyzing the degree of deterioration, so it is not possible to clarify whether the storage battery is simply deteriorating or whether a malfunction such as a breakdown has occurred.

[0007] An object of the present invention is to provide a rechargeable battery management system that, when a user reports a problem with a storage battery, determines whether the problem is simply deterioration or whether a problem including manufacturing factors has occurred and notifies the user.

[0008] The battery management system of the present invention includes an inspection device, a first database, a second database, and a central management device. The inspection device measures the SOC-OCV characteristics of a storage battery module and generates inspection results of the usage state of the storage battery module, including the SOC-OCV characteristics. The first database stores the inspection results of the usage state of the storage battery module obtained by the inspection device. The second database stores quality information at the time of manufacture of battery cells used in the storage battery module. The central management device is able to access the first database and the second database. The central management device analyzes the degree of deterioration of the storage battery module from the SOC-OCV characteristics, and generates and stores defect information for the storage battery module based on the analysis results of the degree of deterioration, the usage state inspection results, and the quality information.

[0009] If the central management device determines from the degradation analysis results that there is a defect caused by the quality at the time of manufacturing of the battery cell, the central management device obtains quality information of the battery cell from the second database, notifies the first database of the content of the defect information related to the quality information, and notifies the degradation analysis results to the inspection device.

[0010] In this configuration, when a malfunction of a storage battery module is received, the degree of deterioration is analyzed by measuring the SOC-OCV characteristics, and based on the results of the analysis of the degree of deterioration, it is determined whether the malfunction involves factors that may have occurred during manufacturing.

[0011] According to this invention, when a user reports a problem with a storage battery, it is possible to determine whether the battery is simply deteriorating or whether a problem including a manufacturing factor has occurred, and notify the user of the problem.

[0012] FIG. 1 is a diagram showing an example of the configuration of a storage battery management system according to a first embodiment. FIG. 2 is a diagram showing an example of the flow of various information used to determine a malfunction of a storage battery module. FIG. 3 is a diagram showing an example of the flow of various information after a malfunction of a storage battery module is determined. FIG. 4 is a diagram showing an example of the flow of various information in the case of deterioration of a battery cell due to usage conditions. FIG. 5 is a diagram showing an example of the flow of various information in the case of a battery cell failure due to a defect during manufacturing. FIG. 6 is a group of flowcharts showing an example of the system flow of a storage battery management method according to the first embodiment. FIG. 7 is a diagram showing an example of the configuration of a storage battery management system and the flow of information according to a second embodiment.

[0013] [First Embodiment] A storage battery management system according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a diagram showing an example of the configuration of the storage battery management system according to the first embodiment.

[0014] As shown in FIG. 1 , the battery management system 10 includes a central management device 20, an operation record management DB 31, an operation record management DB 32, an inspection device 411, an inspection device 412, an inspection device 421, an inspection device 422, and a manufacturing quality management DB 60.

[0015] The manufacturing quality control DB 60 is provided by a battery manufacturer. The manufacturing quality control DB 60 corresponds to the "second database" of the present invention.

[0016] This battery manufacturer has, for example, battery factories 71, 72, and 73, and produces a plurality of the same type of battery cells (lithium ion secondary battery cells) and ships them to product manufacturer 1 and product manufacturer 2.

[0017] Operational performance management DB 31 is provided at product manufacturer 1. Operational performance management DB 32 is provided at product manufacturer 2. Product manufacturer 1 and product manufacturer 2 are, for example, manufacturers of different products, and manufacture products that include storage battery modules that include electronic cells manufactured by a battery manufacturer. Operational performance management DB 31 and operation performance management DB 32 correspond to the "first database" of the present invention.

[0018] 1, for example, product manufacturer 1 manufactures the same type of battery-powered device 511 and battery-powered device 512. Product manufacturer 2 manufactures the same type of battery-powered device 521 and battery-powered device 522.

[0019] The inspection device 411 is provided in the retail store 11. The inspection device 412 is provided in the retail store 12. The retail stores 11 and 12 are stores that sell products of the product manufacturer 1.

[0020] The inspection device 421 is provided in the retail store 21. The inspection device 422 is provided in the retail store 22. The retail stores 21 and 22 are stores that sell products of the product manufacturer 2.

[0021] The central management unit 20 belongs to the battery manufacturer and may be located at the battery manufacturer or may be located at a location independent of the battery manufacturer. The central management unit 20 is only required to have at least a function for analyzing the degree of deterioration of the battery cells using the SOC-OCV characteristics and a function for determining malfunctions in the storage battery modules, which will be described later.

[0022] The central management unit 20 can perform data communication with the operation record management DB 31 and the operation record management DB 32. In other words, the central management unit 20 can access the operation record management DB 31 and the operation record management DB 32.

[0023] The operation record management DB 31 can perform data communication with the inspection device 411 and the inspection device 412. The operation record management DB 32 can perform data communication with the inspection device 421 and the inspection device 422.

[0024] The central control unit 20 can perform data communication with the production quality control DB 60. In other words, the central control unit 20 can access the production quality control DB 60.

[0025] 2 is a diagram showing an example of the flow of various information used to determine a defect in a storage battery module. The flow of information from the inspection device 411, the inspection device 412, the inspection device 421, and the inspection device 422 to the central management device 20 is shown.

[0026] The inspection devices 411, 412, 421, and 422 have charge / discharge functions. The inspection devices 411, 412, 421, and 422 measure the SOC-OCV characteristics of the storage battery modules that they themselves charge during charging.

[0027] For example, when charging the storage battery module of battery-powered device 511, inspection device 411 measures the SOC-OCV characteristics of the storage battery module of battery-powered device 511. Similarly, when charging the storage battery modules of battery-powered devices 512, 521, and 522, inspection devices 412, 421, and 422 each measure the SOC-OCV characteristics of the storage battery modules of battery-powered devices 512, 521, and 522.

[0028] Furthermore, the inspection devices 411, 412, 421, and 422 acquire battery management system information (BMS information) of the storage battery modules charged by their own devices from the storage battery modules. The battery management system information includes, for example, the number of times the storage battery modules have been charged, the number of days they have been used, and the number of days they have been left unused. At this time, the inspection devices 411, 412, 421, and 422 acquire the serial numbers of the storage battery modules charged by their own devices, and the product numbers and serial numbers of the battery cells used in the storage battery modules.

[0029] The inspection device 411 and the inspection device 412 transmit the SOC-OCV characteristics and BMS information acquired by the device itself to the operation record management DB 31 as inspection results of the usage state.

[0030] The operation record management DB 31 accumulates the inspection results of the usage state of each storage battery module received from the inspection device 411 and the inspection device 412. At this time, the serial number of the storage battery module for which the inspection results are accumulated is linked to the product number and serial number of the battery cells used in this storage battery module.

[0031] The inspection devices 421 and 422 transmit the SOC-OCV characteristics and BMS information acquired by their own devices as inspection results of the usage state to the operation history management DB 32. The operation history management DB 32 accumulates the inspection results of the usage state for each storage battery module received from the inspection devices 421 and 422. At this time, the serial numbers of the storage battery modules for which the inspection results are accumulated are linked to the serial numbers of the battery cells used in these storage battery modules, and are accumulated as part of the inspection results.

[0032] The manufacturing quality control DB 60 stores quality information about the battery cells during their manufacture. Specifically, the manufacturing quality control DB 60 stores the serial numbers of the battery cells manufactured at the battery factories 71, 72, and 73 and the manufacturing lot numbers that include these battery cells as quality information.

[0033] Furthermore, if a defect occurs during the manufacture of a battery cell at battery factories 71, 72, and 73, manufacturing quality control DB 60 adds the manufacturing number of the battery cell in which the defect occurred and the manufacturing lot number including this battery cell to the quality information and stores them.

[0034] (Flow of various information after malfunction determination) A user notices a malfunction in a storage battery module of a battery-powered device and brings the storage battery module to be determined for malfunction to a dealer. As described above, an inspection device installed at the dealer measures the SOC-OCV characteristics of the storage battery module to be determined for malfunction, acquires BMS information for the storage battery module, and generates inspection results including these. The inspection device transmits the inspection results to the operation history management DB, and the operation history management DB transmits the received inspection results to central management unit 20.

[0035] FIG. 3 is a diagram showing an example of the flow of various information after a malfunction of a storage battery module is determined.

[0036] The central management unit 20 analyzes the degree of deterioration of the storage battery module (battery cell) that is the subject of failure determination based on the SOC-OCV characteristics in the received test results.

[0037] The central management unit 20 also acquires BMS information for the storage battery module that is being determined to have a malfunction. The central management unit 20 also acquires the manufacturing lot number of the battery cell used in the storage battery module that is being determined to have a malfunction, based on the linking information included in the inspection results.

[0038] Based on the analysis results of the deterioration level, the central management unit 20 determines whether the storage battery module being judged to be defective is due to a defect that occurred during manufacturing or due to deterioration of the battery cells over time. At this time, the central management unit 20 refers to the BMS information.

[0039] Specifically, based on the degree of deterioration and the BMS information, the central management unit 20 determines that the deterioration is due to the battery cells of the storage battery module being evaluated being deteriorated due to usage conditions if the deterioration is due to the number of charges exceeding the allowable number of times, or due to over-discharge caused by leaving the battery module without charging or discharging for a long period of time.

[0040] On the other hand, if the central management unit 20 does not obtain the above-mentioned determination result, it determines that there is a possibility of a defect occurring during manufacturing.

[0041] When the central management unit 20 determines that there is a possibility of a manufacturing defect, it uses the manufacturing lot number of the battery cell to inquire of the manufacturing quality management DB 60 whether or not there is a manufacturing defect (inquiry of defect information).

[0042] Based on the quality information stored in the device itself, the manufacturing quality control DB 60 detects whether or not a defect has occurred in the manufacturing lot number inquired about by the central management unit 20. The manufacturing quality control DB 60 responds to the central management unit 20 with the detection result of the presence or absence of a defect.

[0043] The central management unit 20 notifies the product manufacturer of the defect information based on the received detection result of the presence or absence of the defect. The central management unit 20 also notifies the deterioration analysis result to the inspection device that performed the charge / discharge (measurement of SOC-OCV characteristics) of the storage battery module whose deterioration level was analyzed.

[0044] (A) Case of Battery Cell Deterioration Due to Usage Conditions FIG. 4 is a diagram showing an example of the flow of various types of information in the case of battery cell deterioration due to usage conditions.

[0045] If the central management unit 20 determines that the battery cells of the storage battery module being evaluated for a malfunction have deteriorated due to usage, it notifies (transmits) the evaluation result and the analysis result of the deterioration level to the operation history management DB. The operation history management DB stores the received evaluation result. The operation history management DB notifies (transmits) the evaluation result and the analysis result of the deterioration level to the inspection device that charged and discharged the storage battery module whose deterioration level was analyzed.

[0046] The inspection device is equipped with, for example, a display device, and upon receiving the judgment result and the degradation level analysis result, the inspection device displays the received judgment result and degradation level analysis result, allowing store staff and users to easily understand the defect judgment result and the degradation level of the storage battery module (battery cell).

[0047] 4, for example, a storage battery module of a battery-powered device 511 is brought into a retail store 11, and an inspection device 411 measures the SOC-OCV characteristics and acquires BMS information of the storage battery module of the battery-powered device 511. Based on this information, a central management device 20 analyzes the degree of deterioration and, referring to the BMS information, determines that the deterioration of the battery cells is due to the state of use.

[0048] The central management unit 20 notifies (transmits) the determination result and the analysis result of the degradation level to the operation record management DB 31. The operation record management DB 31 notifies (transmits) the determination result and the analysis result of the degradation level to the inspection device 411. The inspection device 411 displays the determination result and the analysis result of the degradation level.

[0049] (B) When there is a possibility of a manufacturing defect FIG. 5 is a diagram showing an example of the flow of various information when a battery cell fails due to a manufacturing defect.

[0050] If the central management unit 20 determines, based on an inquiry to and response from the manufacturing quality control DB 60, that a battery cell in a storage battery module being determined to be defective has failed due to a defect that occurred during manufacturing, it notifies (sends) this determination result (defect information) to the operation history management DB. At this time, the central management unit 20 obtains from the manufacturing quality control DB 60 the shipping destination (product manufacturer) of batteries in the same manufacturing lot as the battery cell in which the failure occurred. The central management unit 20 also notifies (sends) the operation history management DB of the shipping destination that it obtained.

[0051] The operation record management DB that receives the defect information stores the judgment result (defect information) and notifies (transmits) the judgment result (defect information) to each of the inspection devices with which data communication is possible.

[0052] The inspection device is equipped with, for example, a display device, and upon receiving the judgment result (defect information), the inspection device displays the judgment result (defect information), thereby allowing store staff and users at each retail store to easily understand the judgment result (defect information).

[0053] 5, a storage battery module of a battery-powered device 511 is brought into a retailer 11, and an inspection device 411 measures the SOC-OCV characteristics of the storage battery module of the battery-powered device 511 and acquires BMS information. Based on this information, the central management unit 20 analyzes the degree of deterioration and, by referring to the BMS information, determines whether there is a possibility of a manufacturing defect. Based on an inquiry to the manufacturing quality management DB 60, the central management unit 20 determines whether the battery cell failure is due to a manufacturing defect.

[0054] If the battery cell failure is due to a defect during manufacturing, the central management unit 20 notifies (sends) this determination result (defect information) to the operation history management DB 31. Furthermore, if the central management unit 20 detects that a battery cell with the same manufacturing lot number as the failed battery cell has been shipped to the product manufacturer 2, it notifies (sends) this determination result (defect information) to the operation history management DB 32.

[0055] The operation history management DB 31 stores the determination result (defect information) in its own device and notifies (transmits) it to the inspection device 411. The inspection device 411 displays the determination result (defect information). Note that the operation history management DB 31 may or may not notify (transmit) the determination result (defect information) to the inspection device 412.

[0056] The operation history management DB 32 stores the determination results (defect information) in its own device. The operation history management DB 32 may or may not notify (transmit) the determination results (defect information) to the inspection device 421 and the inspection device 422.

[0057] Furthermore, the central management unit 20 notifies (transmits) the content related to manufacturing quality (such as what kind of defect occurred) from the determination results (defect information) to the manufacturing quality control DB 60. The manufacturing quality control DB 60 stores the received content related to manufacturing quality by linking it to the manufacturing lot number.

[0058] For example, 300 battery cells are manufactured in one lot at each of battery factories 71, 72, and 73. The 300 battery cells manufactured at battery factory 71 have production lot number LOT1, the 300 battery cells manufactured at battery factory 71 have production lot number LOT2, and the 300 battery cells manufactured at battery factory 73 have production lot number LOT3. Furthermore, the 300 battery cells of production lot number LOT1 are assigned serial numbers 1-300, the 300 battery cells of production lot number LOT2 are assigned serial numbers 301-600, and the 300 battery cells of production lot number LOT3 are assigned serial numbers 601-900.

[0059] One hundred units from each production lot are shipped to product manufacturer 1 (e.g., an electrically assisted bicycle manufacturer or an automobile manufacturer), product manufacturer 2 (e.g., an automobile manufacturer), and product manufacturer 3 (e.g., a power tool manufacturer). Note that although product manufacturer 3 is not shown in the above explanation, for the purposes of the following explanation, it is assumed that product manufacturer 3 exists.

[0060] Specifically, serial numbers 1-100 of production lot number LOT1, serial numbers 301-400 of production lot number LOT2, and serial numbers 601-700 of production lot number LOT3 have been shipped to product manufacturer 1. Serial numbers 101-200 of production lot number LOT1, serial numbers 401-500 of production lot number LOT2, and serial numbers 701-800 of production lot number LOT3 have been shipped to product manufacturer 2. Serial numbers 201-300 of production lot number LOT1, serial numbers 501-600 of production lot number LOT2, and serial numbers 801-900 of production lot number LOT3 have been shipped to product manufacturer 3.

[0061] Here, if a battery cell (serial number 50) used by product manufacturer 1 is subjected to inspection device 411, the SOC-OCV characteristics are acquired, and a degradation analysis is performed, and as a result it is estimated that the degradation factor is related to manufacturing, central management unit 20 queries production quality control DB 60 to determine whether, among battery cells (serial number 1-300) in the same lot as the battery cell with that serial number, there is similar defect information for other battery cells with serial numbers 1-49 and 51-100 that have been shipped to product manufacturer 1, whether there is similar defect information for battery cells with serial numbers 101-200 that have been shipped to product manufacturer 2, or whether there is similar defect information for battery cells with serial numbers 201-300 that have been shipped to product manufacturer 3. If there is similar defect information for battery cells shipped to product manufacturer 2 or product manufacturer 3, central management unit 20 notifies product manufacturer 2 or product manufacturer 3 of that information, and also notifies production quality control DB 60 of the defect information for the battery cell with serial number 50.

[0062] As described above, when a user reports a malfunction of a storage battery, the storage battery management system 10 can determine whether the battery is simply deteriorating or whether a malfunction including a manufacturing factor has occurred, and notify the user.

[0063] (Storage Battery Management Method) Fig. 6 is a set of flowcharts showing an example of a system flow of a storage battery management method according to the first embodiment. Note that the specific content of each process shown in the set of flowcharts in Fig. 6 is described in the description of the configuration above. Therefore, for the following storage battery management method, a description of the specific content will be omitted except where necessary.

[0064] The manufacturing quality control DB 60 of the battery manufacturer acquires the manufacturing number and manufacturing lot number of the battery cell manufactured by the manufacturer, and transmits them to the central management unit 20 (S61).

[0065] The inspection device (the inspection device that will perform charging among the inspection devices 411, 412, 421, and 422) acquires the serial number and BMS information of the battery cells used in the storage battery module that will perform charging (S11). The inspection device transmits the BMS of the storage battery module (battery cell) together with the serial number to the central management device 20 (S12).

[0066] The testing device starts charging the storage battery module and measuring the SOC-OCV characteristics (S13). When the testing device completes measuring the SOC-OCV characteristics (S14: YES), it transmits the SOC-OCV characteristics to the central management device 20.

[0067] The central management unit 20 analyzes the degree of deterioration of the storage battery module (battery cell) from the SOC-OCV characteristics (S21).

[0068] When the central management unit 20 determines from the analysis result of the deterioration level that the cause of the deterioration is not a defect in the manufacturing stage (S22: NO), it notifies the inspection device of the analysis result of the deterioration level (S23).

[0069] If the central management unit 20 determines from the results of the degradation analysis that the cause of the degradation is a defect in the manufacturing stage (S22: YES), it identifies the battery manufacturer (manufacturing quality control DB 60) that manufactured the battery cell from the manufacturing number and lot number of the battery cell for which the degradation analysis was performed, and queries this manufacturing quality control DB 60 for the manufacturing lot number and defect information (S24).

[0070] The manufacturing quality control DB 60 receives the inquiry about the manufacturing lot number and defect information (S62).The manufacturing quality control DB 60 checks whether the same defect exists in battery cells shipped to other product manufacturers with the same manufacturing lot number.

[0071] If there is a defect (S63: YES), the production quality control DB 60 returns defect information to the central management unit 20 (S64). If there is no defect (S63: NO), the production quality control DB 60 returns no defect information to the central management unit 20 (S65).

[0072] The central management unit 20 receives a response from the manufacturing quality control DB 60 (battery manufacturer) (S25). If a defect is found (S26: YES), the central management unit 20 notifies all product manufacturers that use (ship) battery cells with the same production lot number as the target battery cell of the defect information (S27).

[0073] If there is no defect (S26: NO), the central management unit 20 notifies the product manufacturer that uses (ships) the battery cell in question of the defect information (S28).

[0074] [Second embodiment] A storage battery management system according to a second embodiment of the present invention will be described with reference to the drawings. Fig. 7 is a diagram showing an example of the configuration of the storage battery management system according to the second embodiment and the flow of information.

[0075] 7 , the battery management system 10A according to the second embodiment differs from the battery management system 10 according to the first embodiment in the method of notifying the results of the degradation level analysis. The other configurations and processes of the battery management system 10A are similar to those of the battery management system 10, and therefore, a description of similar parts will be omitted.

[0076] The central management unit 20 analyzes the degree of deterioration of the storage battery module (battery cell) and generates the analysis results, and then notifies the analysis results directly to the inspection device that charged the storage battery module (battery cell) whose deterioration level was analyzed.

[0077] With this configuration, the battery management system 10A can achieve the same effects as the battery management system 10.

[0078] The above explanation shows a case where there are two operation history management DBs and four inspection devices, but these numbers are not limited to the numbers shown here. For example, if there are three or more product manufacturers that use storage battery modules, the number of operation history management DBs included corresponds to the number of manufacturers. Also, if there are three or more retail stores belonging to one product manufacturer, the number of inspection devices included corresponds to the number of stores.

[0079] <1> A storage battery management system comprising: an inspection device that measures SOC-OCV characteristics of a storage battery module and generates inspection results of a usage state of the storage battery module including the SOC-OCV characteristics; a first database that accumulates inspection results of the usage state of the storage battery module by the inspection device; a second database that accumulates quality information at the time of manufacture of battery cells used in the storage battery module; and a central management device that can access the first database and the second database, analyzes a degree of deterioration of the storage battery module from the SOC-OCV characteristics, and generates and accumulates defect information of the storage battery module based on the analysis results of the degree of deterioration, the inspection results of the usage state, and the quality information, wherein when the central management device determines, from the analysis results of the degree of deterioration, that there is a defect caused by the quality of the battery cell at the time of manufacture, the central management device obtains the quality information of the battery cell from the second database, notifies the first database of content of the defect information related to the quality information, and notifies the inspection device of the analysis results of the degree of deterioration.

[0080] <2> The battery management system of <1>, which notifies the second database of the content of the defect information related to the quality information.

[0081] <3> The battery management system of <1> or <2>, wherein the inspection device includes the number of times the storage battery module is charged and the number of days of use as inspection items for the usage state; the central management device acquires the number of times the storage battery module is charged and the number of days of use; and determines whether deterioration of the storage battery module is within an acceptable range using the number of times the storage battery module is charged and the number of days of use of the storage battery module and an analysis result of the deterioration level; and notifies the inspection device of the determination result of whether deterioration of the storage battery module is within an acceptable range; and the inspection device has a display device and displays the determination result.

[0082] <4> The battery management system of any of <1> to <3>, wherein, when there are a plurality of the inspection devices and the first databases, the central management device, when determining that there is a defect caused by the quality of the battery cell at the time of manufacturing, acquires another shipping destination of the battery cell, and notifies the first database corresponding to the other shipping destination of the content of the defect information related to the quality information.

[0083] <5> The battery management system of <4>, wherein, when the central management device determines that the defect is not caused by the quality of the battery cell at the time of manufacturing, the central management device notifies only the inspection device that measured the SOC-OCV characteristics of the analysis result of the degree of deterioration.

[0084] 10, 10A: Battery management system 20: Central management device 31, 32: Operational performance management DB 60: Manufacturing quality management DB 71, 72, 73: Battery factory 411, 412, 421, 422: Inspection device 511, 512, 521, 522: Battery-using device

Claims

1. A battery management system comprising: an inspection device that measures SOC-OCV characteristics of a battery module and generates inspection results of the usage state of the battery module including the SOC-OCV characteristics; a first database that accumulates the inspection results of the usage state of the battery module by the inspection device; a second database that accumulates quality information at the time of manufacture of battery cells used in the battery module; and a central management device that can access the first database and the second database, analyzes a deterioration level of the battery module from the SOC-OCV characteristics, and generates and accumulates defect information of the battery module based on the deterioration level analysis results, the usage state inspection results, and the quality information, wherein when the central management device determines from the deterioration level analysis results that there is a defect caused by the quality of the battery cell at the time of manufacture, it obtains the quality information of the battery cell from the second database, notifies the first database of content of the defect information related to the quality information, and notifies the inspection device of the deterioration level analysis results.

2. The battery management system according to claim 1, further comprising: notifying the second database of the defect information that is related to the quality information.

3. A battery management system as described in claim 1 or claim 2, wherein the inspection device includes the number of times the storage battery module is charged and the number of days of use in the inspection items for the usage state, the central management device acquires the number of times the storage battery module is charged and the number of days of use, and uses the number of times the storage battery module is charged and the number of days of use and the analysis result of the deterioration level to determine whether or not the deterioration of the storage battery module is within an acceptable range, and notifies the inspection device of the determination result of whether or not the deterioration of the storage battery module is within an acceptable range, and the inspection device is equipped with a display device and displays the determination result.

4. A battery management system as described in any one of claims 1 to 3, wherein, when there are a plurality of the inspection devices and the first databases, when the central management device determines that there is a defect caused by the quality of the battery cell at the time of manufacture, it obtains another shipping destination of the battery cell and notifies the first database corresponding to the other shipping destination of the content of the defect information related to the quality information.

5. The battery management system of claim 4, wherein, when the central management device determines that the defect is not caused by quality at the time of manufacture of the battery cell, it notifies the analysis result of the degree of deterioration only to the inspection device that measured the SOC-OCV characteristics.