WO2021230225A1 - 解析装置、解析システムおよび解析方法 - Google Patents
解析装置、解析システムおよび解析方法 Download PDFInfo
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- WO2021230225A1 WO2021230225A1 PCT/JP2021/017815 JP2021017815W WO2021230225A1 WO 2021230225 A1 WO2021230225 A1 WO 2021230225A1 JP 2021017815 W JP2021017815 W JP 2021017815W WO 2021230225 A1 WO2021230225 A1 WO 2021230225A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
- H02J7/82—Control of state of charge [SOC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/448—End of discharge regulating measures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an analysis device, an analysis system, and an analysis method.
- Patent Document 1 Japanese Patent No. 6123844
- an analysis device for a battery module connects the network with measurement data that measures the charge / discharge characteristics of one or more battery cells contained in the battery module, and analysis data that includes identification data that identifies at least one of the battery module or battery cell. It may be provided with a data acquisition unit to be acquired via.
- the analysis device may include a data analysis unit that analyzes characteristics related to the charge capacity of at least one battery cell based on the analysis data acquired by the data acquisition unit.
- the analysis device may include a data transmission unit that transmits transmission data according to the analysis result in the data analysis unit via the network.
- the data acquisition unit may acquire identification data in which the module identification data for identifying the battery module and the cell identification data for identifying the battery cell are associated with each other.
- the data analysis unit may analyze the characteristics related to the charge capacity of the battery cell for each battery module.
- the analysis device may include an analysis data recording unit that records the measurement data acquired over time by the data acquisition unit in association with the identification data.
- the data analysis unit may assign new identification data to the battery cell corresponding to the same identification data based on the history of the measurement data corresponding to the same identification data.
- the data analysis unit may generate control data for controlling the battery cell based on the analysis result.
- the data transmission unit may transmit transmission data including control data.
- the data analysis unit may calculate the remaining capacity of each battery cell in the battery module based on the measurement data.
- the data analysis unit may generate control data by discharging at least one of the battery cells having a non-minimum remaining capacity to reduce the difference in the remaining capacity from the battery cell having the minimum remaining capacity.
- the data analysis unit may generate replacement time data indicating when the battery cell should be replaced based on the analysis result.
- the data transmission unit may transmit transmission data including exchange timing data.
- the data analysis unit may generate failure data indicating that the battery cell has failed based on the analysis result.
- the data transmission unit may transmit transmission data including failure data.
- the data analysis unit may analyze the characteristics related to the charge capacity of the battery cell based on the differential characteristics of the voltage-capacity characteristic during charging or discharging of the battery cell.
- the data acquisition unit may acquire analysis data including temperature data indicating the temperature of the battery cell at the time of measuring the voltage-capacity characteristic.
- the data analysis unit may correct the analysis based on the differential characteristics based on the temperature of the battery cell.
- the analysis device may include a reference characteristic recording unit that records the reference characteristics of the differential characteristics of each battery cell.
- the reference characteristic may have one or more reference feature points.
- the data analysis unit may analyze the battery cell based on the measurement feature point in the differential characteristic of the battery cell and the reference feature point in the reference characteristic.
- the reference characteristic recording unit may record at least one of the reference characteristic when the battery cell is charged and the reference characteristic when the battery cell is discharged.
- the data analysis unit may select a reference characteristic to be compared with the differential characteristic based on whether the measurement data of the battery cell is charging or discharging data.
- the data analysis unit may calculate the deterioration rate of the battery cell based on the deterioration amount of the battery cell calculated from the differential characteristics.
- the data analysis unit may calculate the measurement interval at which the data regarding the charge / discharge of the battery cell should be measured based on the deterioration rate of the battery cell.
- the data transmission unit may transmit transmission data according to the measurement interval.
- the data analysis unit determines the rate of dissociation of charge capacity between two or more battery cells based on the amount of dissociation of charge capacity between two or more battery cells calculated from the differential characteristics of two or more battery cells. It may be calculated.
- the data analysis unit may calculate the measurement interval at which data regarding the charging / discharging of two or more battery cells should be measured based on the deviation speed of the two or more battery cells.
- the data transmission unit may transmit transmission data according to the measurement interval.
- an analysis system including an analysis device according to the first aspect and an analysis data transmission unit that transmits analysis data to the analysis device via a network.
- a third aspect of the present invention provides a method for analyzing a battery module.
- the analysis method may include a measurement step of generating measurement data that measures the charging / discharging characteristics of one or more battery cells contained in the battery module.
- the analysis method may comprise an analysis data transmission step of transmitting analysis data, including measurement data and identification data that identifies at least one of the battery module or battery cell, over the network.
- the analysis method may include a data acquisition step of acquiring analysis data via a network.
- the analysis method may include a data analysis step of analyzing the characteristics related to the charge capacity of at least one battery cell based on the analysis data acquired in the data acquisition step.
- the analysis method may include a result transmission step of transmitting transmission data according to the analysis result in the data analysis stage via a network.
- FIG. 10 It is a figure which shows the structural example of the analysis system 10 which concerns on embodiment of this invention. It is a figure explaining the detailed configuration example of the analysis system 10. It is a figure which shows an example of the data for analysis. It is a figure which shows an example of transmission data. It is a figure explaining the variation of the remaining capacity of the battery cell 204 included in the battery module 202. It is a figure which shows the other structural example of the analysis apparatus 100. It is a figure explaining an example of the measurement data included in the analysis data. It is a figure which shows an example of the reference characteristic which a reference characteristic recording unit 110 records. It is a figure explaining the method of calculating the remaining capacity of a battery cell 204 from a reference characteristic and a differential characteristic.
- FIG. 1 is a diagram showing a configuration example of the analysis system 10 according to the embodiment of the present invention.
- the analysis system 10 collects measurement data obtained by measuring the characteristics of one or more battery modules 202 via the network 12 and analyzes the state of the battery modules 202.
- the analysis system 10 of this example includes an analysis device 100 and one or more analysis data transmission units 200.
- Each battery module 202 has one or more battery cells 204.
- the battery cell 204 has a configuration capable of generating electric power by itself.
- each battery cell 204 has a negative electrode, a positive electrode, and a main body that generates electric power between both electrodes.
- the battery module 202 may have a plurality of battery cells 204 connected in series. Further, the battery module 202 may have a plurality of battery cells 204 connected in parallel. A group of battery cells 204 electrically connected in series or in parallel may be used as one battery module 202. Further, the battery cell 204 group housed in the common housing may be used as one battery module 202.
- the analysis data transmission unit 200 transmits analysis data for analyzing the characteristics of the battery module 202 to the analysis device 100 via the network 12.
- the analysis data transmission unit 200 may be provided for each battery module 202, or may be provided in common for a plurality of battery modules 202.
- the analysis data transmission unit 200 may be provided in the housing of the battery module 202. In another example, the analysis data transmission unit 200 may be provided separately from the battery module 202. In this case, it is preferable that the analysis data transmission unit 200 is provided so as to be able to communicate with the battery module 202.
- the analysis data includes measurement data obtained by measuring the charge / discharge characteristics of one or more battery cells 204 included in the battery module 202.
- the characteristics relating to charging / discharging are the electrical characteristics of the battery cell 204 at at least one timing at the start of charging, during charging, at the end of charging, at the start of discharging, during discharging, or at the end of discharging. It's okay.
- the electrical characteristics may include at least one of the battery cell 204, the voltage between the poles, the output current, the residual capacity value, or the output resistance. Also, the electrical characteristics may include at least one of the battery cell 204's changes over time in the voltage between the poles or the output current.
- the electrical characteristics may include at least one of the changes over time of the battery cell 204, such as the deterioration of the remaining capacity value or the output resistance.
- the voltage between the two poles described above may be the voltage between the two poles of the battery module 202 including the plurality of battery cells 204 connected in series, or the voltage between the two poles of the unit in which the plurality of battery modules 202 are combined.
- the analysis data includes identification data associated with the measurement data.
- the identification data includes at least one of the module identification data that identifies the battery module 202 and the cell identification data that identifies the battery cell 204.
- the module identification data may be a serial number assigned to the plurality of battery modules 202.
- the cell identification data may be a serial number assigned to one or more battery cells 204 included in the battery module 202.
- the network 12 is, for example, the Internet or a local area network, but is not limited thereto.
- the network 12 may be a dedicated network for connecting a plurality of analysis data transmission units 200 and the analysis device 100, and is a general-purpose network that also performs communication other than communication between the analysis data transmission unit 200 and the analysis device 100. May be.
- the analysis device 100 acquires analysis data of each battery module 202 via the network 12.
- the analysis device 100 analyzes the characteristics regarding the charge capacity of one or more battery cells 204 included in the battery module 202 based on the analysis data. Unless otherwise specified in the present specification, the unit of battery capacity is amp-hour (Ah).
- the analysis device 100 may be a device that processes information by one computer, or may be a device that distributes information by a plurality of computers.
- the characteristics related to the charge capacity include the full charge capacity of the battery cell 204, the remaining capacity of the battery cell 204, the measured value of the internal resistance of the battery cell 204, the amount of change over time such as deterioration of these characteristics, or the battery module 202.
- the fully charged capacity or the remaining capacity may be referred to as a charging capacity (or capacity). That is, the charge capacity (or capacity) in the present specification is a concept including both the full charge capacity and the remaining capacity.
- the analysis device 100 may transmit the analysis result to the outside.
- the analysis device 100 may transmit the analysis result to an apparatus including the analysis data transmission unit 200, and may transmit the analysis result to an apparatus different from the analysis data transmission unit 200.
- FIG. 2 is a diagram illustrating a detailed configuration example of the analysis system 10.
- the analysis system 10 of this example includes a battery management device 206 and a measurement unit 208.
- the battery management device 206 and the measurement unit 208 may be provided for each battery module 202.
- FIG. 2 shows a battery management device 206, a measurement unit 208, and an analysis data transmission unit 200 provided attached to one battery module 202.
- Each of the analysis data transmission unit 200, the battery management device 206, or the measurement unit 208 may be incorporated in the battery module 202, or may be separately attached to the single battery module 202.
- the measurement unit 208 generates measurement data that measures the electrical characteristics of the battery module 202.
- the measuring unit 208 may have at least one of an ammeter and a voltmeter.
- the analysis data transmission unit 200 transmits the measurement data generated by the measurement unit 208 and the analysis data including the identification data of the battery module 202 and the like to the analysis device 100.
- the battery management device 206 receives transmission data from the analysis device 100.
- the battery management device 206 may control the battery module 202 based on the received transmission data. Further, the battery management device 206 may provide the user of the battery module 202 with information according to the received transmission data. As an example, the battery management device 206 may charge and discharge each battery cell 204 based on the remaining capacity of each battery cell 204 indicated by the transmission data.
- the transmission data may include control data for controlling and charging / discharging each battery cell 204. Further, the battery management device 206 may provide the user with information regarding the capacity of each battery cell 204.
- the battery management device 206 may be included in the same device as the analysis data transmission unit 200.
- the analysis device 100 may send and receive transmission data and analysis data via the same communication path.
- the battery management device 206 may be a device separate from the analysis data transmission unit 200.
- the analysis data transmission unit 200 may be a device managed by a user using the battery module 202, and the battery management device 206 may be a device managed by the provider who provided the battery module 202 to the user. ..
- the analysis device 100 may send and receive transmission data and analysis data via different communication routes.
- the battery management device 206 and the analysis data transmission unit 200 may both be user-managed devices, or both may be provider-managed devices.
- the analysis device 100 of this example includes a data acquisition unit 102, a data analysis unit 104, and a data transmission unit 106.
- the analysis device 100 may further include an analysis data recording unit 108.
- the data acquisition unit 102 acquires analysis data via the network 12.
- the data acquisition unit 102 may record the acquired analysis data in the analysis data recording unit 108.
- the analysis data recording unit 108 records the analysis data for each identification data.
- the data analysis unit 104 analyzes the characteristics related to the charge capacity of at least one battery cell 204 based on the analysis data acquired by the data acquisition unit 102.
- the data analysis unit 104 may sequentially analyze the analysis data acquired by the data acquisition unit 102, or may read the analysis data from the analysis data recording unit 108 and analyze the data.
- the data transmission unit 106 transmits transmission data according to the analysis result in the data analysis unit 104 to the battery management device 206 via the network 12.
- the data transmission unit 106 may determine the transmission destination of the transmission data based on the identification data included in the analysis data used by the data analysis unit 104 for the analysis. For example, the data transmission unit 106 may hold in advance the correspondence information in which the identification data and the transmission destination are associated with each other.
- the analysis data may include information that specifies the destination of the transmission data. In this case, the battery management device 206 may notify the analysis data transmission unit 200 of the information specifying the transmission destination.
- the analysis device 100 since the analysis device 100 is not provided for each battery module 202, the cost of the battery module 202 can be reduced. Further, the performance of the analysis device 100 is improved, and it becomes easy to perform high-precision analysis.
- FIG. 3 is a diagram showing an example of analysis data.
- one analysis data includes analysis data for one battery module 202.
- one analysis data may include analysis data regarding a plurality of battery modules 202.
- the analysis data includes identification data and measurement data Me.
- the identification data includes at least one of the module identification data Mo and the cell identification data Ce.
- the module identification data Mo and the cell identification data Ce are associated with each other.
- the data analysis unit 104 may analyze the characteristics related to the charge capacity of the battery cell 204 for each battery module 202.
- the data analysis unit 104 may analyze the capacity variation of the battery cell 204 included in the battery module 202.
- the measurement data Me is data for each battery cell 204.
- the analysis data recording unit 108 may record the measurement data acquired by the data acquisition unit 102 over time in association with the identification data.
- the identification data includes the cell identification data Ce
- the measurement data Me is associated with the cell identification data Ce.
- the data analysis unit 104 analyzes the measurement data Me for each cell identification data Ce, and analyzes the characteristics related to the charge capacity of the individual battery cells 204.
- each measurement data Me is associated with the common module identification data Mo.
- the data analysis unit 104 analyzes each measurement data Me and analyzes the characteristics related to the charge capacity of the battery cell 204. However, when it is not specified which battery cell 204 the analyzed characteristic is, for example, the data analysis unit 104 has a maximum value, a minimum value, and an average value of the capacity of the battery cell 204 included in the battery module 202. Etc. at least one is analyzed.
- the analysis data further includes the temperature data T and the operation time data L.
- the temperature data T indicates the temperature of the battery cell 204 or the battery module 202 when the measurement data is measured.
- the temperature data T may indicate the ambient temperature of the battery module 202 when the measurement data is measured.
- the temperature data T may be data common to the battery cells 204 in the battery module 202.
- the operation time data L may indicate the cumulative operation time of each battery cell 204.
- the operating time may be the elapsed time from the start of use of the battery cell 204, or may be the cumulative time during which the battery cell 204 is being charged or discharged. Further, the number of charge / discharge cycles of the battery cell 204 may be used as the operation time. Further, the operation time data L may indicate the cumulative operation time of the battery module 202.
- the operation time data L may be data for each battery cell 204, or may be data common to the battery cells 204 in the battery module 202.
- FIG. 4 is a diagram showing an example of transmission data.
- one transmission data includes data regarding one battery module 202.
- one transmission data may include data regarding a plurality of battery modules 202.
- the transmission data may include identification data.
- the identification data includes at least one of the module identification data Mo and the cell identification data Ce.
- the transmission data may include analysis result data A.
- the analysis result data A is, for example, data relating to the capacity of each battery cell 204.
- the analysis result data A is data indicating at least one of the maximum value, the minimum value, or the average value of the capacities of one or more battery cells 204 included in the battery module 202.
- the transmission data may include control data Co.
- the control data Co is data used for controlling the charging / discharging of one or more battery cells 204 included in the battery module 202.
- the control data Co may specify at least one of a charge amount, a discharge amount, a charge timing, a discharge timing, a charge speed, or a discharge speed of each battery cell 204.
- the data analysis unit 104 may generate control data Co based on the analysis result of the capacity of each battery cell 204. For example, the data analysis unit 104 generates control data Co that reduces the capacity variation between one or more battery cells 204 of the battery module 202.
- the data analysis unit 104 may generate control data Co when the difference between the maximum value and the minimum value of the remaining capacities of the plurality of battery cells 204 included in the battery module 202 becomes a predetermined threshold value or more. As a result, it is possible to prevent the capacity variation between the battery cells 204 from becoming too large.
- the transmission data may include exchange time data R.
- the data analysis unit 104 may calculate the time when each battery cell 204 should be replaced based on the analysis result of the capacity of each battery cell 204. As an example, the data analysis unit 104 may calculate the deterioration rate of each battery cell 204 based on the history of the measurement data recorded in the analysis data recording unit 108, and estimate the replacement time based on the deterioration rate. .. The deterioration of the battery cell 204 can be calculated from the deterioration of the full charge capacity, the voltage between the two poles, the output current, and the like. The data analysis unit 104 may calculate the time when the characteristic of the battery cell 204 falls below a predetermined reference value as the replacement time of the battery cell 204.
- the replacement time data R may be data for each battery cell 204. In another example, the replacement time data R may be data for each battery module 202. In this case, the data analysis unit 104 may set the earliest replacement time among the replacement times of the battery cells 204 included in the battery module 202 as the replacement time of the battery module 202.
- the transmission data may include failure data F.
- the data analysis unit 104 may determine whether or not each battery cell 204 is out of order based on the analysis result of the capacity of each battery cell 204. As an example, the data analysis unit 104 determines whether or not each battery cell 204 has failed based on the change over time in characteristics such as the full charge capacity of each battery cell 204. The data analysis unit 104 may determine that the battery cell 204 has failed when the difference between the characteristic value calculated last time and the characteristic value calculated this time exceeds a predetermined reference value.
- the failure data F may be data for each battery cell 204. In another example, the failure data F may be data for each battery module 202. In this case, the data analysis unit 104 may determine that the battery module 202 has failed when any of the battery cells 204 included in the battery module 202 fails.
- the transmission data may include at least one of analysis result data, control data, replacement timing data, or failure data.
- the transmission data may include data other than these.
- FIG. 5 is a diagram illustrating variations in the remaining capacity of the battery cell 204 included in the battery module 202.
- three battery cells 204-1, 204-2, and 204-3 will be described, but the number of battery cells 204 included in the battery module 202 is not limited to three.
- each battery cell 204 is represented by a rectangle.
- the upper end max of the rectangle indicates the upper limit value of the remaining capacity of the battery cell 204 (that is, the fully charged capacity), and the lower end min indicates the lower limit value of the remaining capacity of the battery cell 204.
- the battery cell 204 is charged and discharged between the upper limit max and the lower limit min in order to prevent overcharging and overdischarging.
- the remaining capacity of each battery cell 204 is shown by hatching with diagonal lines.
- the remaining capacity of each battery cell 204 included in the battery module 202 may vary. For example, when the natural discharge rate of the battery cell 204 is different, the remaining capacity of the battery cell 204 varies.
- the plurality of battery cells 204 in this example are charged at the same time. Therefore, if the remaining capacity varies, each battery cell 204 can be charged only in an amount corresponding to the battery cell 204 having the least free capacity, and all the battery cells 204 cannot be charged up to the upper limit max. Similarly, when a plurality of battery cells 204 are discharged simultaneously with respect to a load, each battery cell 204 can discharge only the amount corresponding to the battery cell 204 having the smallest remaining capacity, and all the battery cells 204 are set to the lower limit. It becomes impossible to discharge up to min. Therefore, the effective capacity in the plurality of battery cells 204 decreases according to the amount of variation in the remaining capacity.
- the analysis device 100 may analyze the remaining capacity of each battery cell 204.
- the battery management device 206 may charge and discharge each battery cell 204 to adjust the cell balance so as to reduce the variation in the remaining capacity of each battery cell 204.
- the battery cell 204 is discharged to adjust the cell balance.
- the battery cell 204 having a relatively large remaining capacity is discharged.
- the battery cell 204 may be charged to adjust the cell balance.
- the battery cell 204 having a relatively small remaining capacity may be charged.
- the cell balance may be adjusted by combining the above-mentioned discharge and charge.
- the processed figure of FIG. 5 shows the effective capacity of the battery cell 204 after adjusting the cell balance.
- the data analysis unit 104 may estimate the amount of increase in the effective capacity by performing the cell balance process.
- the data transmission unit 106 may transmit transmission data indicating an estimated increase in effective capacity to the battery management device 206.
- FIG. 6 is a diagram showing another configuration example of the analysis device 100.
- the analysis device 100 of this example accurately analyzes the capacity of each battery cell 204. The higher the analysis accuracy of the remaining capacity in the data analysis unit 104, the more accurately the cell balance adjustment can be executed, and the easier it is to increase the effective capacity.
- the analysis device 100 of this example further includes a reference characteristic recording unit 110 with respect to the example shown in FIG. Other configurations are the same as the example described in FIG.
- the reference characteristic recording unit 110 records a predetermined reference characteristic.
- the data analysis unit 104 analyzes the capacity of the battery cell 204 based on the characteristics calculated from the measurement data and the reference characteristics.
- FIG. 7 is a diagram illustrating an example of measurement data included in the analysis data.
- the measuring unit 208 of this example measures the voltage-capacity characteristic showing the relationship between the voltage between the two electrodes during charging or discharging of each battery cell 204 and the estimated remaining capacity, and generates measurement data.
- the measuring unit 208 may measure the voltage-capacity characteristic during the actual operation of the battery module 202.
- the actual operation is, for example, a state in which the battery module 202 is supplying electric power to the load, or a state in which surplus electric power of the power generation device is being supplied to the battery module 202.
- the measuring unit 208 may calculate the remaining capacity of each battery cell 204 from the integrated amount of the current output from the battery module 202 and the current supplied to the battery module 202.
- the remaining capacity of the battery cell 204 decreases by the amount of the current output from the battery module 202, and the remaining capacity of the battery cell 204 increases by the amount of the current charged in the battery module 202.
- the measuring unit 208 of this example measures the voltage-capacity characteristic in a predetermined measurement range of the estimated remaining capacity Q.
- the measurement range is a part of the range between the lower limit min and the upper limit max of the estimated remaining capacity.
- the measurement range preferably does not include the lower limit min and the upper limit max of the estimated remaining capacity.
- the measuring unit 208 can measure the voltage-capacity characteristic without putting the battery cell 204 in a state close to overcharging or overdischarging.
- the size of the measurement range may be half or less of the size of the range of the lower limit min and the upper limit max, and may be 1/4 or less.
- the voltage-capacity characteristic can be acquired in a short time, and it becomes easy to acquire the voltage-capacity characteristic even during the actual operation of the battery module 202. Further, by reducing the measurement range, it is easy to measure the voltage-capacity characteristic without overcharging or overdischarging each battery cell 204 even when the remaining capacity of the plurality of battery cells 204 varies. Become.
- FIG. 8 is a diagram showing an example of a reference characteristic recorded by the reference characteristic recording unit 110.
- the reference characteristic corresponds to the characteristic obtained by differentiating the voltage-capacity characteristic of the battery cell 204 by the remaining capacity.
- the reference characteristics of the battery cell 204 can be determined in advance based on the electrode material of the battery cell 204 and based on the manufacturer and model of the battery cell 204 or the battery module 202.
- the reference characteristic recording unit 110 may record a plurality of types of reference characteristics corresponding to a plurality of types of electrode materials. It is preferable that the data analysis unit 104 analyzes the battery cell 204 by using the reference characteristics corresponding to the electrode material of the battery cell 204 to be analyzed.
- the data acquisition unit 102 may acquire analysis data indicating the electrode material of the battery cell 204. Further, the analysis data recording unit 108 may record information indicating the electrode material of the battery cell 204 in association with at least one of the battery module 202 or the battery cell 204.
- lithium ions move between the positive electrode and the negative electrode during charging and discharging.
- Lithium ions are inserted into each electrode active material (also referred to as reduction), or lithium ions are desorbed (also referred to as oxidation) to change the crystal structure of the electrode active material.
- This change in crystal structure is called a "phase transition" and is a phenomenon that occurs in the vicinity of the potential inherent in the electrode active material, which is defined electrochemically. Due to the phase transition phenomenon, a peak appears at a predetermined position in the reference characteristic.
- the voltage-capacity characteristic of the battery cell 204 can be determined according to the type of the electrode active material, and the reference characteristic which is the differential characteristic thereof can also be determined.
- the reference characteristic may be acquired by measuring the characteristic of one or more battery cells as a reference in advance. Further, the reference characteristic may be acquired in advance by simulation. The method for acquiring the reference characteristics may be the same as the method described in Patent Document 1.
- FIG. 9 is a diagram illustrating a method of calculating the remaining capacity of the battery cell 204 from the reference characteristic and the differential characteristic.
- the data analysis unit 104 of this example translates the differential characteristics to a position where the error between the differential characteristics and the reference characteristics is minimized.
- the data analysis unit 104 may determine the position by the method of least squares.
- the amount of the differential characteristic moved in the axial direction of the remaining capacity Q corresponds to the error between the estimated remaining capacity in the battery cell 204 described with reference to FIG. 7 and the actual remaining capacity.
- the data analysis unit 104 may calculate the actual remaining capacity of the battery cell 204 from the error and the current estimated remaining capacity of the battery cell 204.
- the data analysis unit 104 may calculate the actual remaining capacity of the battery cell 204 by the same method as that disclosed in Patent Document 1.
- each reference characteristic may have a reference feature point.
- the reference feature point is a point that should be included in the differential characteristic in order to perform the fitting between the reference characteristic and the differential characteristic with high accuracy.
- the reference feature point may be a point where the fluctuation according to the measurement conditions such as temperature is smaller than that of other points.
- Reference feature points may be located in the slope portion between the peaks of the reference characteristic.
- the reference feature point may be a point at which the reference characteristic has a minimum value.
- the reference feature point may be the apex of the peak of the reference feature.
- a plurality of reference feature points may be set for the reference characteristic.
- the reference characteristic recording unit 110 may record the value of the remaining capacity at the reference feature point for each reference characteristic.
- the measuring unit 208 may measure the characteristics of the battery cell 204 in the measuring range including any reference feature point (that is, the range of the estimated remaining capacity). The position of each reference feature point may be notified from the analysis device 100 to the battery management device 206. Further, the analysis device 100 may notify the battery management device 206 of the measurement range including any of the reference feature points. By acquiring the measurement data in the measurement range, the differential characteristics of the measurement data include the measurement feature points corresponding to the reference feature points.
- the data analysis unit 104 may analyze the capacity of the battery cell 204 based on the measurement feature points in the differential characteristics of the battery cell 204 and the reference feature points in the reference characteristics. As described above, the data analysis unit 104 may translate the differential characteristics so that the positions of the measurement feature points and the positions of the reference feature points coincide with each other.
- the remaining capacity of the battery cell 204 is analyzed, but the data analysis unit 104 may analyze the full charge capacity of the battery cell 204.
- the data analysis unit 104 may use the differential characteristic obtained by differentiating the voltage-capacity characteristic by the voltage.
- the reference characteristic recording unit 110 may record the reference characteristic corresponding to the differential characteristic.
- the data analysis unit 104 may adjust at least one of the position or amplitude of the reference characteristic so that the error from the differential characteristic is minimized.
- the full charge capacity of the battery cell 204 can be calculated by integrating the adjusted reference characteristics within a predetermined working voltage range.
- the data analysis unit 104 may calculate the full charge capacity of the battery cell 204 by the same method as that disclosed in Patent Document 1.
- the data analysis unit 104 may calculate the ratio of the remaining capacity (also referred to as SOC) to the fully charged capacity.
- the data analysis unit 104 uses the differential characteristic based on the temperature of the battery cell 204. You may correct the analysis that was done.
- the voltage-capacitive characteristic of the battery cell 204 may vary depending on the temperature of the battery cell 204.
- the data analysis unit 104 may analyze the characteristics of the battery cell 204 by correcting the characteristic fluctuation due to the temperature of the battery cell 204. Specifically, the data analysis unit 104 may correct at least one of the differential characteristic and the reference characteristic according to the temperature.
- the data analysis unit 104 may shift the differential characteristic or the reference characteristic in the residual capacitance axis direction according to the temperature.
- the data analysis unit 104 may correct the amplitude of the differential characteristic or the reference characteristic according to the temperature. Correction information indicating how each characteristic should be corrected may be set in advance in the data analysis unit 104 according to the temperature of the battery cell 204. The correction information can be generated by measuring in advance how the voltage-capacity characteristic fluctuates according to the temperature fluctuation.
- the data analysis unit 104 can analyze the capacity of the battery cell 204 with high accuracy.
- the analysis in the data analysis unit 104 is not limited to the contents described in FIGS. 7 to 9.
- the data analysis unit 104 may analyze information regarding the capacity of the battery cell 204 by using a known method. For example, the data analysis unit 104 can calculate the remaining capacity based on the voltage between the two poles of the battery cell 204. The relationship between the voltage between the two poles and the remaining capacity may be given to the data analysis unit 104 in advance.
- the data analysis unit 104 may estimate the remaining capacity of the battery cell 204 by integrating the output current and the charging current of the battery cell 204.
- FIG. 10 is a diagram illustrating a process for reducing variation in the remaining capacity of a plurality of battery cells 204 included in the battery module 202.
- the data analysis unit 104 may generate transmission data for charging / discharging the battery cell 204.
- the charging / discharging of the battery cell 204 may be performed by the battery management device 206 based on the control data Co included in the transmission data, or may be performed by the battery management device 206 based on the analysis result data A included in the transmission data.
- the initial stage S1001 shows a state in which the remaining capacity of the battery cell 204 varies. In FIG. 10, as in FIG. 5, the remaining capacity is shown by hatching with diagonal lines.
- the measuring unit 208 measures the characteristics such as the voltage between the two poles and the discharge current of each battery cell 204.
- the second measurement step S1003 all the battery cells 204 may be charged by the same amount.
- the measuring unit 208 measures characteristics such as the voltage between the two poles and the charging current of each battery cell 204.
- the measuring unit 208 can measure the voltage-capacity characteristic of each battery cell 204.
- the measuring unit 208 may calculate the estimated remaining capacity of each battery cell 204 by sequentially integrating the discharge current or the charge current.
- the measuring unit 208 may measure the voltage-capacity characteristic during the actual operation of the battery module 202 instead of the processing of S1002 and S1003. That is, the measuring unit 208 measures the voltage and current of the battery cell 204 while the battery module 202 is supplying current to the load or while the battery module 202 is being charged with the surplus power of the power generation device. May be good.
- the discharge step S1004 at least one of the battery cells 204 having the smallest remaining capacity is discharged to reduce the difference in the remaining capacity from the battery cell 204 having the smallest remaining capacity.
- all the battery cells 204 other than the battery cell 204 having the minimum remaining capacity may be discharged by the same amount.
- the remaining capacity of the battery cell 204-3 is the minimum.
- the battery cells 204-1 and 204-2 are discharged.
- the remaining capacity of the battery cell 204-2 having the smallest remaining capacity among the battery cells 204-1 and 204-2 other than the battery cell 204-3 is equal to the remaining capacity of the battery cell 204-3.
- the battery cells 204-1 and 204-2 may be discharged so as to be.
- the same processing as in the discharge stage S1004 is repeated. That is, at least one of the battery cells 204 having the smallest remaining capacity is discharged, and the difference in the remaining capacity from the battery cell 204 having the smallest remaining capacity is reduced.
- the remaining capacities of the battery cells 204-3 and 204-2 are the minimum. Therefore, in this example, the battery cell 204-1 is discharged. Also in S1005, the battery cell 204-1 may be discharged so that the remaining capacity of the battery cell 204-1 becomes equal to the minimum remaining capacity.
- the battery cell 204 is a lithium ion battery, the effect of suppressing deterioration by the treatment described with reference to FIG. 10 may be remarkable.
- each battery cell 204 may be fully charged in order to match the remaining capacity of the battery cell 204.
- the capacity of each battery cell 204 can be analyzed with high accuracy. Therefore, as described with reference to FIG. 10, the cell balance can be adjusted without putting the battery cell 204 in a fully charged state. Further, in the method described with reference to FIGS. 7 to 9, since the partial measurement range may be measured, it is easy to control the remaining capacity of the battery cell 204 so as not to reach the upper limit max or the lower limit min. Further, according to the method described with reference to FIG.
- FIG. 11 is a diagram showing an example of voltage-capacity characteristics when the battery cell 204 is discharged.
- the voltage-capacity characteristic shown in FIG. 7 is a diagram showing an example of the voltage-capacity characteristic at the time of charging the battery cell 204.
- the voltage-capacity characteristic during discharge is the voltage-capacity characteristic measured while reducing the remaining capacity of the battery cell 204, and the voltage-capacity characteristic during charging is measured while increasing the remaining capacity of the battery cell 204.
- Voltage-capacity characteristics As shown in FIGS. 7 and 11, the voltage-capacity characteristics of the battery cell 204 may differ between charging and discharging. It has been experimentally confirmed that the voltage-capacity characteristics may differ when the battery cell 204 is charged and discharged.
- FIG. 12 is a diagram showing an example of reference characteristics when the battery cell 204 is discharged. Similar to the voltage-capacity characteristic, the reference characteristic obtained by differentiating the voltage-capacity characteristic may be different between charging and discharging the battery cell 204.
- the reference characteristic recording unit 110 may record at least one of the reference characteristic when the battery cell 204 is charged and the reference characteristic when the battery cell 204 is discharged. In this example, the reference characteristic recording unit 110 records both the reference characteristic at the time of charging and the reference characteristic at the time of discharging.
- the data analysis unit 104 selects a reference characteristic to be compared with the differential characteristic calculated from the measurement data Me based on whether the measurement data Me of the battery cell 204 is the data during charging or discharging of the battery cell 204. You can do it. That is, when the measurement data Me is the measurement data at the time of charging, the data analysis unit 104 selects the reference characteristic at the time of charging. When the measurement data Me is the measurement data at the time of discharge, the data analysis unit 104 selects the reference characteristic at the time of discharge. It is preferable that the analysis data includes data indicating whether the measurement data Me is the measurement data at the time of charging or at the time of discharging.
- FIG. 13 is a diagram illustrating an outline of charging / discharging of the battery cell 204.
- the negative electrode 218 of the battery cell 204 has a plurality of graphite layers 220.
- the state of the negative electrode 218 according to the density at which the lithium ion 222 is inserted between the graphite layers 220 is referred to as a stage.
- the voltage-capacitive characteristic changes depending on the stage of the negative electrode 218.
- FIG. 14 is a diagram illustrating another example of cell balance processing.
- the data analysis unit 104 may generate transmission data for charging / discharging the battery cell 204, as in the example of FIG.
- the charging / discharging of the battery cell 204 may be performed by the battery management device 206 based on the control data Co included in the transmission data, or may be performed by the battery management device 206 based on the analysis result data A included in the transmission data.
- the initial stage S1501 shows a state in which the remaining capacity of the battery cell 204 varies.
- each battery cell 204 is charged until the battery cell 204-1 having the largest remaining capacity is fully charged.
- the fully charged battery cell 204-1 is discharged.
- the battery cell 204-1 is used until the remaining capacity of the battery cell 204-2, which has the largest remaining capacity in the battery cells 204 other than the battery cell 204-1, and the remaining capacity of the battery cell 204-1 match. Discharge.
- each battery cell 204 is charged until the battery cells 204-1 and 204-2 having the largest remaining capacity are fully charged.
- the fully charged battery cells 204-1 and 204-2 are discharged.
- the battery cells 204-1 and 204-2 are discharged until the remaining capacities of the battery cells 204-1 and 204-2 and the battery cell 204-3 having the largest remaining capacity in the remaining battery cells 204 match. do.
- the remaining capacities of all the battery cells 204 can be made equal. As a result, the effective capacity of the battery module 202 can be increased.
- the data analysis unit 104 may analyze the capacity of the battery cell 204 by the method described in FIGS. 7 to 9, and another method may be used.
- the data analysis unit 104 may calculate the remaining capacity based on the voltage between the two poles of the battery cell 204.
- the data analysis unit 104 may estimate the remaining capacity of the battery cell 204 by integrating the output current and the charging current of the battery cell 204.
- FIG. 15 is a diagram illustrating an outline of the battery module 202.
- the battery module 202 of this example includes a positive terminal 211, a negative terminal 212, and a plurality of battery cells 204 connected in series between both terminals. Further, the battery module 202 has a discharge switch 213, a discharge resistor 214, and a voltmeter 215 for each battery cell 204.
- the discharge switch 213 switches whether or not to connect the positive electrode and the negative electrode of the battery cell 204 via the discharge resistor 214. By turning on the discharge switch 213, the corresponding battery cell 204 can be discharged.
- the voltmeter 215 measures the voltage between the two poles of the corresponding battery cell 204.
- the voltmeter 215 functions as part of the measuring unit 208.
- the battery module 202 may further include an ammeter 216 provided in series with the plurality of battery cells 204.
- the ammeter 216 measures the current flowing through the plurality of battery cells 204.
- the ammeter 216 functions as part of the measuring unit 208.
- individual battery cells 204 can be selected and discharged. Further, when charging a plurality of battery cells 204, the battery management device 206 connects a power source for charging to the positive terminal 211 and the negative terminal 212. Therefore, a plurality of battery cells 204 are charged at the same time. According to the method described with reference to FIG. 10 or 14, the variation in the remaining capacity of the battery module 202 having the configuration shown in FIG. 15 can be easily reduced.
- FIG. 16 is a flowchart showing an operation example of the analysis device 100.
- the analysis device 100 of this example generates correction data for correcting the remaining capacity of each battery cell 204 based on the analysis data, and transmits the correction data to the battery management device 206.
- Other operations are the same as the examples described in FIGS. 1 to 15.
- the data transmission unit 106 causes the battery management device 206 to start the characteristic measurement of the battery cell 204.
- the data transmission unit 106 may transmit transmission data that triggers the start of measurement via the network 12.
- the data transmission unit 106 may transmit transmission data that specifies the measurement range shown in FIG. 7.
- the transfer request step S1102 the data transmission unit 106 requests the battery management device 206 to transfer the analysis data via the network 12.
- the data acquisition unit 102 acquires analysis data from the analysis data transmission unit 200 via the network 12.
- the data analysis unit 104 analyzes the characteristics related to the charge capacity of at least one battery cell 204 based on the analysis data acquired in the data acquisition step S1103.
- the data analysis unit 104 of this example may calculate an error between the estimated remaining capacity of the battery cell 204 estimated by the measurement unit 208 and the remaining capacity calculated by the analysis.
- the data transmission unit 106 transmits the transmission data according to the analysis result in the data analysis stage S1104 to the battery management device 206 via the network 12.
- the transmission data of this example includes correction data for correcting the estimated remaining capacity.
- FIG. 17 is a flowchart showing an operation example of the battery management device 206, the measurement unit 208, and the analysis data transmission unit 200.
- the battery management device 206 of this example corrects the estimated remaining capacity of each battery cell 204 based on the analysis result in the analysis device 100. This makes it possible to improve the accuracy of the estimated remaining capacity managed by the battery management device 206.
- Other operations are the same as the examples described in FIGS. 1 to 15.
- the analysis device 100 of this example generates measurement data in which the measurement unit 208 measures the characteristics related to the charging / discharging of one or more battery cells 204 included in the battery module 202.
- the measurement unit 208 may measure the characteristics of each battery cell 204 so as to include the measurement range specified by the transmission data.
- the battery management device 206 may cause the measurement unit 208 to start the measurement in response to the trigger received from the analysis device 100 in the measurement start step S1101 of FIG.
- the measurement step S1201 corresponds to S1002 and S1003 in FIG.
- the measuring unit 208 integrates the current value when the battery cell 204 is charged / discharged when the battery cell 204 is charged / discharged in order to measure the characteristics of the battery cell 204 (S1202). Further, the measuring unit 208 acquires the integrated value of the current value at each timing within the predetermined period (S1203). The measuring unit 208 calculates an estimated value of the remaining capacity at each timing based on the acquired integrated value (S1204). As a result, as shown in FIG. 7, the voltage-capacity characteristic of the battery cell 204 in a predetermined measurement range can be acquired.
- the battery management device 206 determines whether or not a transfer request for analysis data has been received from the analysis device 100.
- the analysis data transmission unit 200 is made to transmit the analysis data (S1206).
- the battery management device 206 performs the next process without performing the process of S1206.
- the battery management device 206 determines whether or not the correction data for correcting the estimated remaining capacity is received from the analysis device 100. When receiving the correction data, the battery management device 206 corrects the estimated remaining capacity (S1208). If the correction data is not received, the battery management device 206 repeats the process from S1201.
- FIG. 18 is a diagram showing another example of the analysis content in the data analysis unit 104.
- the data analysis unit 104 of this example calculates the deterioration rate of the battery cell 204 from the differential characteristics of the battery cell 204.
- the data analysis unit 104 may calculate the deterioration rate of the battery cell 204 from the change in the full charge capacity of the battery cell 204.
- the data analysis unit 104 may calculate the number of times of charging / discharging of the battery cell 204 from the usage history of the battery cell 204, and calculate the deterioration rate based on the amount of deterioration of the fully charged capacity with respect to the number of times of charging / discharging.
- the data analysis unit 104 may use the quotient obtained by dividing the integrated value of the charging current of the battery cell 204 by a predetermined reference value during the usage period as the number of times the battery cell 204 is charged.
- the data analysis unit 104 may use the quotient obtained by dividing the integrated value of the discharge current of the battery cell 204 by a predetermined reference value during the usage period as the number of discharges of the battery cell 204. For these reference values, the rated capacity of the battery cell 204 may be used.
- the data analysis unit 104 may use the sum of the number of charges and the number of discharges as the number of charges and discharges.
- FIG. 18 shows a graph in which the horizontal axis is the number of charge / discharge cycles and the vertical axis is the full charge capacity.
- the data analysis unit 104 may calculate the change over time in the full charge capacity of each battery cell 204 based on the time-series measurement data recorded by the analysis data recording unit 108.
- the measurement data may include integrated values of charge current and discharge current during the period from the start of use of the battery cell 204 to the timing of measuring the characteristics of the battery cell 204.
- the data analysis unit 104 may calculate the deterioration rate of the battery cell 204 based on the amount of change in the full charge capacity from a predetermined start point to the present time.
- the starting point may be set at any timing from the start time of the battery cell 204 to the present time.
- the deterioration rate of this example is the amount of deterioration of the fully charged capacity per unit number of charge / discharge times.
- the data analysis unit 104 may estimate the deterioration rate of the full charge capacity after the present time from the measured value of the change with time of the full charge capacity.
- the data analysis unit 104 may use the deterioration rate from a predetermined start point to the present time as the deterioration rate after the present time.
- the data analysis unit 104 may estimate the deterioration rate after the present time from the value of the current full charge capacity.
- the data analysis unit 104 may be given a relationship between the value of the full charge capacity and the deterioration rate after the present time in advance.
- the relationship may be a design value by the manufacturer of the battery cell 204, or may be a relationship statistically obtained from the actual results of the battery cell 204 of the same type.
- the data analysis unit 104 may generate replacement time data indicating when the battery cell 204 should be replaced based on the analysis result of the analysis data. For example, the data analysis unit 104 estimates the time when the full charge capacity falls below the predetermined reference value QRef based on the estimated value of the deterioration rate. The time may be represented by the elapsed time from the present time (for example, month, day, hour), or may be represented by the number of charge / discharge cycles. The data analysis unit 104 may calculate how many times of charging / discharging is performed per unit time from the usage history of the battery cell 204. The data analysis unit 104 may calculate the elapsed time corresponding to the replacement time from the calculated time-charge / discharge frequency relationship. Further, the data analysis unit 104 displays the exchange time data indicating that the period until the exchange time is 0 (that is, the exchange should be performed at the present time) when the current full charge capacity is less than the predetermined reference value QRef. May be generated.
- FIG. 19 is a diagram showing another example of the analysis content in the data analysis unit 104.
- the data analysis unit 104 of this example is calculated between two or more battery cells 204 based on the amount of difference in charge capacity between the two or more battery cells 204, which is calculated from the differential characteristics of the two or more battery cells 204. Calculate the deviation speed of the charge capacity of. The amount of deviation may be used as the amount of deterioration of two or more battery cells 204.
- the charge capacity may be the remaining capacity at the start of characteristic measurement of the battery cell 204 as shown in the initial stage S1001 of FIG. 10 or the initial stage S1501 of FIG.
- the charge capacity may be the full charge capacity of the battery cell 204.
- the data analysis unit 104 calculates the charge / discharge count of the battery cell 204 from the usage history of the battery cell 204 recorded by the analysis data recording unit 108, and the deviation amount with respect to the charge / discharge count.
- the divergence rate may be calculated based on the change.
- the horizontal axis represents the number of charge / discharge cycles, and the vertical axis represents the amount of deviation in charge capacity.
- the data analysis unit 104 may calculate the change with time of the dissociation amount of the charge capacity based on the time-series measurement data recorded by the analysis data recording unit 108.
- the data analysis unit 104 may calculate the deviation speed of the charge capacity between the battery cells 204 based on the change in the deviation amount from the predetermined start point to the present time.
- the data analysis unit 104 may estimate the deviation rate after the present time from the measured value of the change with time of the deviation amount.
- the data analysis unit 104 may use the deviation speed from a predetermined start point to the present time as the deviation speed after the present time.
- the data analysis unit 104 may estimate the dissociation rate after the present time from the value of the dissociation amount at the present time.
- the data analysis unit 104 may be given in advance the relationship between the value of the deviation amount and the deviation speed after the present time.
- the relationship may be a design value by the manufacturer of the battery cell 204, or may be a relationship statistically obtained from the actual results of the battery cell 204 of the same type.
- FIG. 20 is a diagram showing a transition example of the effective capacity of the battery module 202.
- the maximum value of the effective capacity of the battery module 202 corresponds to the total full charge capacity of each battery cell 204. However, as described with reference to FIG. 4, if the remaining capacity of each battery cell 204 varies, the effective capacity of the battery module 202 becomes smaller than the maximum value.
- the maximum value of the effective capacity is shown by a broken line, and the actual effective capacity is shown by a solid line. In this example, the maximum value of the effective capacity gradually decreases due to the deterioration of each battery cell 204 with time.
- the effective capacity of the battery module 202 gradually decreases.
- the cell balance processing of the remaining capacity between the battery cells 204 described with reference to FIG. 10 is executed at a predetermined time interval I1. Therefore, the effective capacity of the battery module 202 recovers to near the maximum value for each time interval I1.
- the time interval I1 By shortening the time interval I1, the amount of effective capacity adjustment in one cell balance process can be reduced. Therefore, the time required for the cell balance processing can be shortened, and the time during which the battery module 202 cannot actually operate can be shortened.
- the data analysis unit 104 may adjust the time interval I based on the dissociation speed of the charge capacities of the two or more battery cells 204.
- the data analysis unit 104 may shorten the time interval I when the difference between the calculated deviation speed and the predetermined design value becomes large.
- the data analysis unit 104 may shorten the time interval I when the tendency of the dissociation of the charge capacity between the battery cells 204 changes.
- the change in the tendency of dissociation is, for example, when the dissociation of the battery cell 204, which is different from the conventional one, becomes large.
- the data analysis unit 104 may shorten the time interval I as the deviation speed increases. As a result, it is possible to suppress an increase in the adjustment amount in one cell balance process. In the example of FIG. 20, the data analysis unit 104 adjusts the time interval to I2.
- the data analysis unit 104 calculates a measurement interval at which data regarding charging / discharging of two or more battery cells 204 should be measured according to the time interval so that the cell balance process can be executed at the time interval.
- the measurement interval is equal to the time interval.
- the data transmission unit 106 transmits transmission data according to the measurement interval.
- the data transmission unit 106 may transmit transmission data that serves as a trigger for causing the measurement unit 208 to measure the characteristics of the battery cell 204 at a timing corresponding to the measurement interval.
- the data transmission unit 106 may transmit transmission data including data indicating the length of the measurement interval.
- the battery management device 206 causes the measuring unit 208 to measure the characteristics of the battery cell 204 at a cycle corresponding to the measurement interval.
- the data analysis unit 104 may generate control data for controlling the charging / discharging of the battery cell 204 according to the analysis result of the measurement data, and transmit the control data at the timing according to the time interval.
- the data analysis unit 104 may adjust the time interval I based on the deterioration rate of the battery cell 204.
- the data analysis unit 104 may shorten the time interval I when the difference between the calculated deterioration rate and the predetermined design value becomes large.
- the data analysis unit 104 may shorten the time interval I when the tendency of deterioration of the charge capacity between the battery cells 204 changes.
- the change in the tendency of deterioration is, for example, when the deterioration of the battery cell 204, which is different from the conventional one, becomes large.
- the data analysis unit 104 may shorten the time interval I as the deterioration rate of the battery cell 204 increases.
- the data analysis unit 104 may use the average value of the deterioration rates of the battery cells 204 included in the battery module 202, or may use the worst value. As a result, it is possible to suppress an increase in the adjustment amount in one cell balance process.
- FIG. 21 is a diagram showing an example of deterioration detection of the battery cell 204.
- the deterioration will be described using the time-dependent change in the full charge capacity of the battery cell 204, but the deterioration may be detected from the time-dependent change in characteristics other than the full charge capacity.
- the data analysis unit 104 of this example detects the deviation amount D between the measured value of the fully charged capacity of the battery cell 204 and the reference value of the fully charged capacity as the deterioration amount of the battery cell 204.
- the measured values of the full charge capacity are plotted with circles.
- the curve that approximates each plot is shown by a solid line.
- the standard value of full charge capacity can be obtained from the standard characteristics of full charge capacity.
- the reference characteristic of the fully charged capacity is a characteristic indicating a change in the fully charged capacity with respect to the number of times of charging and discharging of the battery cell 204.
- the reference characteristic of the full charge capacity may be a design value obtained from the manufacturer of the battery cell 204 or a statistical value obtained statistically.
- the reference characteristics of the battery cell 204 may be recorded in advance in the data analysis unit 104.
- the data analysis unit 104 may correct the reference characteristics based on the temperature of the battery cell 204, the leaving time in the fully charged state or the minimum charged state, and the like.
- the data analysis unit 104 may calculate the deviation speed at which the battery cell 204 deviates from the reference characteristic from the relationship between the number of charges and discharges and the deviation amount D.
- the data analysis unit 104 may adjust the time interval I described in FIG. 20 based on the deviation amount D or the deviation speed.
- the data analysis unit 104 may shorten the time interval I when the deviation amount D or the deviation speed becomes equal to or more than a predetermined reference value.
- the time interval I1 is adjusted to I2 at the timing when the deviation amount D becomes equal to or larger than the reference value.
- the data analysis unit 104 may notify the battery management device 206 to that effect.
- the data analysis unit 104 may shorten the time interval I when the deviation tendency between the characteristics of the battery cell 204 and the reference characteristics changes. For example, the data analysis unit 104 may determine that the deviation tendency has changed when the difference between the measured values this time and the approximate curve that approximates the measured values up to the previous time becomes a predetermined value or more. In the example of FIG. 21, the time interval I2 is adjusted to I3 at the timing when the divergence tendency changes. Further, when the deviation amount D becomes equal to or more than the reference value, the data analysis unit 104 may notify the battery management device 206 to that effect.
- FIG. 22 is a diagram showing another example of the analysis content in the data analysis unit 104.
- the data analysis unit 104 of this example generates failure data indicating that the battery cell 204 has failed based on the analysis result of the analysis data.
- the data transmission unit 106 may transmit transmission data including failure data to the battery management device 206.
- the data analysis unit 104 of this example generates failure data based on the change over time in the full charge capacity Qmax of the battery cell 204.
- the data analysis unit 104 determines the battery cell 204 when the decrease ⁇ Q of the full charge capacity calculated from the current analysis data exceeds a predetermined reference value with respect to the full charge capacity calculated from the previous analysis data. May be determined to have failed. As a result, it is possible to detect peeling of electrodes or sudden changes in characteristics and notify the battery management device 206.
- the characteristics used for failure determination are not limited to the full charge capacity.
- FIG. 23 is a diagram showing another example of the analysis content in the data analysis unit 104.
- the data analysis unit 104 of this example detects that the battery cell 204 has been replaced based on the analysis result of the analysis data.
- the data analysis unit 104 of this example detects whether or not the battery cell 204 is replaced based on the change over time in the full charge capacity Qmax of the battery cell 204.
- the data analysis unit 104 is the battery cell 204. May be determined to have been replaced.
- the data analysis unit 104 may determine that the battery cell 204 has been replaced based on the magnitude of the change in characteristics other than the fully charged capacity such as the differential characteristics.
- FIG. 24 is a diagram showing an operation example of the data analysis unit 104.
- FIG. 24 shows time-series analysis data 1 and 2 recorded by the analysis data recording unit 108.
- the analysis data 1 and 2 differ in the timing at which the characteristics of the battery cell 204 are measured.
- the measurement unit 208 of this example allocates cell identification data Ce to the measurement data of each battery cell 204 based on the position of each battery cell 204 in the battery module 202. For example, the measuring unit 208 allocates cell identification data Ce for each voltmeter 215 shown in FIG. Therefore, even when any of the battery cells 204 in the battery module 202 is replaced, the same cell identification data Ce is assigned to the battery cell 204 before the replacement and the battery cell 204 after the replacement. In this case, if the analysis device 100 manages the measurement data for each cell identification data Ce, the measurement data of the battery cell 204 before the replacement and the measurement data of the battery cell 204 after the replacement are confused and managed. In this case, the characteristics of the battery cell 204 may not be analyzed accurately.
- the data analysis unit 104 of this example allocates a new cell identification data Ce to the battery cell 204 corresponding to the same cell identification data Ce based on the history of the measurement data corresponding to the same cell identification data Ce. For example, as described with reference to FIG. 23, the data analysis unit 104 determines that the battery cell 204 has been replaced when the change in the full charge capacity calculated from the history of the measurement data is equal to or greater than the reference value, and the battery concerned.
- the cell identification data Ce of cell 204 is updated. In the example of FIG. 24, the cell identification data Ce12 is updated to the cell identification data Ce12b. This makes it possible to prevent confusion of the measurement data of the battery cell 204 before and after replacement.
- FIG. 25 is a diagram showing another configuration example of the battery module 202.
- the battery module 202 of this example includes a BMS 230 (Battery Management System) that manages the battery module 202.
- the BMS 230 may be the battery management device 206 shown in FIG. 2, and may be a circuit capable of communicating with the battery management device 206.
- the BMS 230 notifies the remaining capacity meter 240 of the estimated remaining capacity of the battery cell 204.
- the BMS 230 may notify the estimated remaining capacity of the individual battery cells 204, or may notify the sum of the estimated remaining capacities of the plurality of battery cells 204.
- the remaining capacity meter 240 may be mounted on the battery module 202, or may be arranged outside the battery module 202.
- the remaining capacity meter 240 displays information regarding the notified estimated remaining capacity.
- the data analysis unit 104 may compare the estimated remaining capacity of the battery cell 204 notified by the BMS 230 with the analysis remaining capacity of the battery cell 204 analyzed from the measurement data.
- the data transmission unit 106 may transmit transmission data including the comparison result.
- the battery management device 206 can be notified whether or not the estimated remaining capacity displayed by the remaining capacity meter 240 is accurate.
- the comparison result may be the difference between the estimated remaining capacity and the analysis remaining capacity.
- Various embodiments of the present invention may be described with reference to flowcharts and block diagrams, wherein the block is (1) a stage of the process in which the operation is performed or (2) a device having a role of performing the operation. May represent a section of. Specific steps and sections may be implemented by a dedicated circuit, a programmable circuit supplied with computer-readable instructions stored on a computer-readable medium, or a processor supplied with computer-readable instructions stored on a computer-readable medium. ..
- the dedicated circuit may include at least one of a digital hardware circuit or an analog hardware circuit, and may include at least one of an integrated circuit (IC) discrete circuit.
- Programmable circuits are memory elements such as logical AND, logical OR, logical XOR, logical NAND, logical NOR, and other logical operations, flip-flops, registers, field programmable gate arrays (FPGAs), programmable logic arrays (PLA), etc. May include reconfigurable hardware circuits, including, etc.
- the computer readable medium may include any tangible device capable of storing instructions executed by the appropriate device, so that the computer readable medium having the instructions stored therein is specified in a flow chart or block diagram. It will be equipped with a product that contains instructions that can be executed to create means for performing the operation. Examples of the computer-readable medium may include an electronic storage medium, a magnetic storage medium, an optical storage medium, an electromagnetic storage medium, a semiconductor storage medium, and the like.
- Computer-readable media include floppy (registered trademark) disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), Electrically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD-ROM), digital versatile disc (DVD), Blu-ray (RTM) disc, memory stick, integrated A circuit card or the like may be included.
- RAM random access memory
- ROM read-only memory
- EPROM or flash memory erasable programmable read-only memory
- EEPROM Electrically erasable programmable read-only memory
- SRAM static random access memory
- CD-ROM compact disc read-only memory
- DVD digital versatile disc
- RTM Blu-ray
- Computer-readable instructions are assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or object-oriented programming such as Smalltalk, JAVA®, C ++, etc. Includes either source code or object code written in any combination of one or more programming languages, including languages, and traditional procedural programming languages such as the "C" programming language or similar programming languages. good.
- Computer-readable instructions are used locally or to a local area network (LAN), wide area network (WAN) such as the Internet, to a general purpose computer, a special purpose computer, or the processor or programmable circuit of another programmable data processing device. ) May execute computer-readable instructions to create means for performing the operations specified in the flowchart or block diagram.
- processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like.
- FIG. 26 shows an example of a computer 2200 in which a plurality of aspects of the present invention may be embodied in whole or in part.
- the program installed on the computer 2200 can cause the computer 2200 to function as an operation associated with the device according to an embodiment of the present invention or as one or more sections of the device, or the operation or the one or more.
- the section can be run, or the computer 2200 can be run a process according to an embodiment of the invention or a stage of the process.
- Such a program may be run by the CPU 2212 to cause the computer 2200 to perform certain operations associated with some or all of the blocks of the flowcharts and block diagrams described herein.
- the computer 2200 includes a CPU 2212, a RAM 2214, a graphic controller 2216, and a display device 2218, which are interconnected by a host controller 2210.
- the computer 2200 also includes an input / output unit such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive, which are connected to the host controller 2210 via the input / output controller 2220.
- the computer also includes legacy input / output units such as ROM 2230 and keyboard 2242, which are connected to the input / output controller 2220 via an input / output chip 2240.
- the CPU 2212 operates according to the programs stored in the ROM 2230 and the RAM 2214, thereby controlling each unit.
- the graphic controller 2216 acquires the image data generated by the CPU 2212 in a frame buffer or the like provided in the RAM 2214 or itself so that the image data is displayed on the display device 2218.
- the communication interface 2222 communicates with other electronic devices via the network.
- the hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200.
- the DVD-ROM drive 2226 reads the program or data from the DVD-ROM 2201 and provides the program or data to the hard disk drive 2224 via the RAM 2214.
- the IC card drive reads programs and data from the IC card, or writes programs and data to the IC card.
- the ROM 2230 stores a boot program or the like executed by the computer 2200 at the time of activation, or a program depending on the hardware of the computer 2200.
- the input / output chip 2240 may also connect various input / output units to the input / output controller 2220 via a parallel port, a serial port, a keyboard port, a mouse port, and the like.
- the program is provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card.
- the program is read from a computer-readable medium, installed on a hard disk drive 2224, RAM 2214, or ROM 2230, which is also an example of a computer-readable medium, and executed by the CPU 2212.
- the information processing described in these programs is read by the computer 2200 and provides a link between the program and the various types of hardware resources described above.
- the device or method may be configured to perform manipulation or processing of information in accordance with the use of computer 2200.
- the CPU 2212 executes a communication program loaded in the RAM 2214, and performs communication processing on the communication interface 2222 based on the processing described in the communication program. You may order.
- the communication interface 2222 reads and reads transmission data stored in a transmission buffer processing area provided in a recording medium such as a RAM 2214, a hard disk drive 2224, a DVD-ROM 2201, or an IC card. The data is transmitted to the network, or the received data received from the network is written to the reception buffer processing area provided on the recording medium.
- the CPU 2212 makes the RAM 2214 read all or necessary parts of the file or the database stored in the external recording medium such as the hard disk drive 2224, the DVD-ROM drive 2226 (DVD-ROM2201), and the IC card. Various types of processing may be performed on the data on the RAM 2214. The CPU 2212 then writes back the processed data to an external recording medium.
- the external recording medium such as the hard disk drive 2224, the DVD-ROM drive 2226 (DVD-ROM2201), and the IC card.
- Various types of processing may be performed on the data on the RAM 2214.
- the CPU 2212 then writes back the processed data to an external recording medium.
- the CPU 2212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 2214. Alternatively, various types of processing may be performed, including replacement, etc., and the results are written back to RAM 2214. Further, the CPU 2212 may search for information in a file, database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 2212 specifies the attribute value of the first attribute. Search for an entry that matches the condition from the plurality of entries, read the attribute value of the second attribute stored in the entry, and associate it with the first attribute that satisfies the predetermined condition. The attribute value of the second attribute obtained may be acquired.
- the program or software module described above may be stored on or on a computer-readable medium near the computer 2200.
- a recording medium such as a hard disk or RAM provided within a dedicated communication network or a server system connected to the Internet can be used as a computer readable medium, thereby providing the program to the computer 2200 over the network. do.
- 10 analysis system, 12 network 100 analysis device, 102 data acquisition unit, 104 data analysis unit, 106 data transmission unit, 108 analysis data recording unit, 110 reference characteristic recording unit, 200 analysis data transmission unit, 202 battery module, 204 battery cell, 206 battery management device, 208 measuring unit, 211 positive terminal, 212 negative terminal, 213 discharge switch, 214 discharge resistor, 215 voltmeter, 216 current meter, 218 negative electrode, 220 graphite layer, 222 lithium ion, 230 BMS, 240 remaining capacity meter, 2200 computer, 2201 DVD-ROM, 2210 host controller, 2212 CPU, 2214 RAM, 2216 graphic controller, 2218 display device, 2220 input / output controller, 2222 communication interface, 2224 hard disk drive, 2226 DVD- ROM drive, 2230 ROM, 2240 input / output chip, 2242 keyboard
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Abstract
Description
特許文献1 特許第6123844号公報
Claims (18)
- 電池モジュールに含まれる1つ以上の電池セルの充放電に関する特性を測定した測定データ、および、前記電池モジュールまたは前記電池セルの少なくとも一方を識別する識別データを含む解析用データを、ネットワークを介して取得するデータ取得部と、
前記データ取得部が取得した前記解析用データに基づいて、少なくとも1つの前記電池セルの充電容量に関する特性を解析するデータ解析部と、
前記データ解析部における解析結果に応じた送信データを、ネットワークを介して送信するデータ送信部と
を備える解析装置。 - 前記データ取得部は、前記電池モジュールを識別するモジュール識別データと、前記電池セルを識別するセル識別データとが対応付けられた前記識別データを取得し、
前記データ解析部は、前記電池モジュール毎に前記電池セルの前記充電容量に関する特性を解析する
請求項1に記載の解析装置。 - 前記データ取得部が経時的に取得した前記測定データを、前記識別データと対応付けて記録する解析用データ記録部を更に備える
請求項1または2に記載の解析装置。 - 前記データ解析部は、同一の前記識別データに対応する前記測定データの履歴に基づいて、前記同一の識別データに対応する前記電池セルに対して新たな前記識別データを割り当てる
請求項3に記載の解析装置。 - 前記データ解析部は、前記解析結果に基づいて、前記電池セルを制御する制御データを生成し、
前記データ送信部は、前記制御データを含む前記送信データを送信する
請求項1から4のいずれか一項に記載の解析装置。 - 前記データ解析部は、前記測定データに基づいて前記電池モジュール内のそれぞれの前記電池セルの残存容量を算出し、
前記データ解析部は、前記残存容量が最小ではない前記電池セルの少なくとも1つを放電させて、前記残存容量が最小の前記電池セルとの前記残存容量の差を縮小させる前記制御データを生成する
請求項5に記載の解析装置。 - 前記データ解析部は、前記解析結果に基づいて、前記電池セルを交換すべき時期を示す交換時期データを生成し、
前記データ送信部は、前記交換時期データを含む前記送信データを送信する
請求項1から6のいずれか一項に記載の解析装置。 - 前記データ解析部は、前記解析結果に基づいて、前記電池セルが故障したことを示す故障データを生成し、
前記データ送信部は、前記故障データを含む前記送信データを送信する
請求項1から7のいずれか一項に記載の解析装置。 - 前記データ解析部は、前記電池セルの充電時または放電時における電圧-容量特性の微分特性に基づいて、前記電池セルの充電容量に関する特性を解析する
請求項1から8のいずれか一項に記載の解析装置。 - 前記データ取得部は、前記電圧-容量特性の測定時における前記電池セルの温度を示す温度データを含む前記解析用データを取得し、
前記データ解析部は、前記電池セルの温度に基づいて、前記微分特性による解析を補正する
請求項9に記載の解析装置。 - 前記解析装置は、それぞれの前記電池セルの前記微分特性の基準特性を記録した基準特性記録部を更に備え、
前記基準特性は、1つ以上の基準特徴点を有し、
前記データ解析部は、前記電池セルの前記微分特性における測定特徴点と、前記基準特性における前記基準特徴点とに基づいて、前記電池セルを解析する
請求項9または10に記載の解析装置。 - 前記基準特性記録部は、前記電池セルを充電したときの前記基準特性と、前記電池セルを放電させたときの前記基準特性との少なくともいずれか一方を記録し、
前記データ解析部は、前記電池セルの前記測定データが、充電時または放電時のいずれのデータかに基づいて、前記微分特性と比較する前記基準特性を選択する
請求項11に記載の解析装置。 - 前記データ解析部は、前記微分特性から算出される前記電池セルの劣化量に基づいて、前記電池セルの劣化速度を算出する
請求項9から12のいずれか一項に記載の解析装置。 - 前記データ解析部は、前記電池セルの前記劣化速度に基づいて、前記電池セルの前記充放電に関するデータを測定すべき測定間隔を算出し、
前記データ送信部は、前記測定間隔に応じた前記送信データを送信する
請求項13に記載の解析装置。 - 前記データ解析部は、2つ以上の前記電池セルの前記微分特性から算出される、前記2つ以上の前記電池セル間における充電容量の乖離量に基づいて、前記2つ以上の前記電池セル間の前記充電容量の乖離速度を算出する
請求項9から14のいずれか一項に記載の解析装置。 - 前記データ解析部は、前記2つ以上の前記電池セルの前記乖離速度に基づいて、前記2つ以上の前記電池セルの前記充放電に関するデータを測定すべき測定間隔を算出し、
前記データ送信部は、前記測定間隔に応じた前記送信データを送信する
請求項15に記載の解析装置。 - 請求項1から16のいずれか一項に記載の解析装置と、
前記解析用データを、前記ネットワークを介して前記解析装置に送信する解析用データ送信部と
を備える解析システム。 - 電池モジュールに含まれる1つ以上の電池セルの充放電に関する特性を測定した測定データを生成する測定段階と、
前記測定データ、および、前記電池モジュールまたは前記電池セルの少なくとも一方を識別する識別データを含む解析用データを、ネットワークを介して送信する解析用データ送信段階と、
前記解析用データを、前記ネットワークを介して取得するデータ取得段階と、
前記データ取得段階で取得した前記解析用データに基づいて、少なくとも1つの前記電池セルの充電容量に関する特性を解析するデータ解析段階と、
前記データ解析段階における解析結果に応じた送信データを、前記ネットワークを介して送信する結果送信段階と
を備える解析方法。
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| US17/923,910 US20230184836A1 (en) | 2020-05-15 | 2021-05-11 | Analysis device, analysis system, and analysis method |
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