WO2015037068A1 - Système de stockage d'électricité - Google Patents

Système de stockage d'électricité Download PDF

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Publication number
WO2015037068A1
WO2015037068A1 PCT/JP2013/074457 JP2013074457W WO2015037068A1 WO 2015037068 A1 WO2015037068 A1 WO 2015037068A1 JP 2013074457 W JP2013074457 W JP 2013074457W WO 2015037068 A1 WO2015037068 A1 WO 2015037068A1
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WO
WIPO (PCT)
Prior art keywords
cell
power storage
life
negative electrode
controller
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Application number
PCT/JP2013/074457
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English (en)
Japanese (ja)
Inventor
山本　恒典
安藤　慎輔
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株式会社日立製作所
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Publication date
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Priority to PCT/JP2013/074457 priority Critical patent/WO2015037068A1/fr
Publication of WO2015037068A1 publication Critical patent/WO2015037068A1/fr

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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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 a power storage system.
  • secondary batteries such as lead, nickel metal hydride, and lithium-ion batteries are installed, and the power obtained by regenerative braking is charged to the secondary batteries and used for acceleration, etc.
  • hybrid systems that improve the power consumption, electric vehicles that are driven by electrical energy stored in secondary batteries, and the like.
  • load leveling using a secondary battery system is required for connection with a power transmission system in order to convert natural energy with large fluctuations into electricity.
  • a film can be formed on the surface of the negative electrode due to a side reaction accompanying a negative electrode charging reaction at the time of initial charge after the battery is manufactured. Yes.
  • the progress of this side reaction is accompanied by lithium ion detachment in the negative electrode, capacity deterioration due to shifting of the positive and negative electrode potentials to the higher potential side, and deterioration of battery characteristics such as increase in resistance due to increase in film thickness of the negative electrode surface film. Will occur. It has been found that this side reaction is accelerated by a temperature rise during battery use or a charge / discharge cycle having a deep charge / discharge depth.
  • the growth of the negative electrode surface film contributes to the deterioration of the battery, but the temperature, current, potential, etc., including other factors, greatly affect the deterioration of the battery.
  • life prediction that predicts when a battery deteriorates and becomes unusable from the operation method of the secondary battery is also very important from the viewpoint of life prediction of the entire power storage system and maintenance thereof.
  • Patent Document 2 describes a method of calculating the amount of potential deviation between positive and negative electrodes from a charge / discharge curve specific to positive and negative electrode materials and a charge / discharge curve of a battery and grasping the deterioration state.
  • Patent Document 3 the deterioration state of the secondary battery mounted on the vehicle is transmitted to the outside, the operation history including the charge / discharge data of the secondary battery is calculated, and the deterioration state is calculated on the driving center side.
  • a technique for instructing correction from the operation center side when the difference from the deterioration state calculation exceeds a reference value is disclosed.
  • Non-Patent Document 1 describes a formula in which a correction term is further incorporated in these formulas.
  • the deterioration factor of the secondary battery is not one and depends on the operation method, so it is very difficult to predict the battery life.
  • Non-Patent Document 1 shows a tendency to deteriorate under a certain operating condition.
  • the operating condition is not constant, and the operating condition becomes very different after a certain time.
  • life prediction by extrapolation by a single test is very inaccurate in an actual system.
  • the degradation state detection method described in Patent Document 1 is an effective inspection method in the actual use state, but the only degradation state index that can be detected is the internal DC resistance. It does not accurately describe the state.
  • the deterioration state detection method described in Patent Document 2 can describe the battery internal state in more detail, but only by detecting these battery internal states, it can only accurately describe the current state of the battery. Yes, it is difficult to accurately predict the lifetime considering future operational changes.
  • Patent Document 3 deterioration information including operation information of the secondary battery is transmitted to the driving center side, and a relatively accurate deterioration state is calculated on the driving center side. It is not simply trying to calculate the battery life prediction with high accuracy or actively controlling the deterioration state of the battery simply by transmitting the deterioration state correction information.
  • An object of the present invention is to accurately grasp the deterioration state of a secondary battery in a power storage system using a secondary battery, and bring the expected life of the power storage system close to the life of the secondary battery.
  • the power storage device includes a plurality of power storage devices, and one or more power storage devices of the plurality of power storage devices include a cell, a positive / negative electrode potential measuring unit, and a dynamic life controller, and the battery cell is a secondary battery including a positive electrode and a negative electrode.
  • the positive and negative electrode potential measuring means measures the positive electrode potential and the negative electrode potential of the cell
  • the potential information of the positive electrode potential and the negative electrode potential of the cell is transmitted to the database server
  • the operating conditions of the cell based on the potential information in the database server
  • the cell life prediction relationship corresponding to the change of the cell is constructed, and the dynamic life controller controls the plurality of power storage devices in accordance with the assumed life of the cell based on the cell life prediction relationship.
  • the deterioration state of the secondary battery can be accurately grasped, and the expected life of the power storage system can be brought close to the life of the secondary battery.
  • Block diagram of a power storage system in Embodiment 1 Cell block diagram in the first embodiment
  • Block diagram of a power storage system in Example 2 Block diagram of a power storage system in Example 3
  • FIG. The figure explaining operation
  • the figure explaining the operating condition change in the electrical storage system and electrical storage apparatus in Example 1 The figure explaining the effect which improves deterioration of the cell in Example 3
  • FIG. 8 is a diagram for explaining changes in operating conditions in the power storage system and the power storage device according to the present embodiment.
  • the assumed replacement life of the secondary battery is 10 years in the grid-connected power storage device. Assuming that the lifetime of the secondary battery is 80% in terms of capacity maintenance rate, as shown in FIG. 8A, the capacity maintenance rate of the secondary battery is 80% 10 years after the operation of the power storage device. Ideally. However, in actual power storage devices, the level of secondary battery operation (instantaneous current, power input / output amount, etc.) is unknown, and the characteristics of the secondary battery deteriorate more than expected due to its strength. Therefore, as shown in FIG. 8 (a), in general, by multiplying the initial mounting amount by a safety factor (2.0 or less in FIG. 8 (a)) and reducing the load on the secondary battery, Designed to meet the expected replacement life.
  • a safety factor 2.0 or less in FIG. 8 (a)
  • the initial amount of the battery is excessive, and the cost considering not only the initial stage but also the life cycle is excessive.
  • the reason why it is necessary to guarantee the lifetime by the safety factor of the initial mounting amount is that the current power storage device 1) cannot grasp the detailed situation of the secondary battery at the time of device operation and the characteristics deteriorate rapidly. This is because it is difficult to predict the characteristics of the future secondary battery when the operation is changed.
  • FIG. P. Represents a checkpoint. After the check point, if the output is increased too much like output III, the life of the secondary battery is shortened. For example, the operator interactively indicates that the life of the secondary battery has been shortened. When the life after the check point is predicted by the outputs of I, II, and III, and the operator selects II, the expected life of the power storage system can be brought close to the life of the secondary battery.
  • FIG. 1 shows a block diagram of a power storage system in this embodiment.
  • a lithium ion secondary battery is used as a secondary battery (hereinafter also referred to as a cell).
  • the power storage system 100 in this embodiment includes a plurality of power storage devices 101.
  • the power storage device 101 includes a dynamic lifetime controller 102, a main control circuit 103, a server transmission unit 104, a cell / battery controller 105, a cooling device 106, a power conversion device 107, and a plurality of cells 108, respectively.
  • the power conversion device 107 is connected to a power generation / load device or a system (not shown) connected to the outside of the power conversion device 107.
  • a power generation / load device or a system (not shown) connected to the outside of the power conversion device 107.
  • the power conversion device 107 operates to store electric power by appropriately converting voltage and current and charging / discharging the plurality of cells 108.
  • the main control circuit 103 also controls the power conversion device 107 in accordance with a charge / discharge command from a system or command station higher than the main control circuit 103 in the same manner as a normal power storage device, and causes current to be taken in and out.
  • the cooling device 106 controls the temperature of the cell 108 similarly to a normal power storage device.
  • the cell / battery controller 105 also monitors the voltage of the cell 108 and outputs a signal to the main control circuit 103 so as to keep the cell 108 in a safe state. It operates to reduce voltage variations.
  • the cell 108 in this embodiment includes a positive electrode 109, a negative electrode 110, a third electrode 111, a positive electrode terminal 112, a negative electrode terminal 113, and positive and negative electrode potential measuring means 114.
  • the positive electrode terminal 112 and the negative electrode terminal 113 are respectively connected to the negative electrode terminal 113 and the positive electrode terminal 112 of the adjacent cell 108, and the ends thereof are connected to the power conversion device 107 and serve as terminals for inputting and outputting power.
  • the positive / negative potential measuring means 114 is connected to the third electrode 111, the positive terminal 112, and the negative terminal 113 inside the cell 108, and transmits the measurement result of the positive / negative voltage of the cell 108 to the cell / battery controller 105. In addition, it has a function of measuring the potential of the positive electrode 109 and the negative electrode 110 with respect to the third electrode 111, that is, the positive electrode potential and the negative electrode potential of the cell 108, and transmitting the measurement results to the dynamic lifetime controller 102.
  • the positive / negative electrode potential measuring means 114 is one of the components of the cell 108, but the positive / negative electrode potential measuring means 114 may be provided outside the cell 108.
  • lithium iron phosphate metal lithium, lithium titanate, or the like may be used.
  • FIG. 6 is a diagram for explaining the operation of the dynamic lifetime controller in the present embodiment.
  • the dynamic life controller 102 receives information on the operating conditions of the cell 108 such as the charge / discharge current of the cell 108, the voltage of the cell 108, and the temperature from the main control circuit 103, the cell / battery controller 105, and the cooling device 106. Then, the potential information of the positive and negative electrode potentials is acquired from the positive and negative electrode potential measuring means 114 as the information I1 regarding the operation condition of the cell 108.
  • the dynamic lifetime controller 102 determines (1) positive and negative electrode utilization rate, which is an index of how much the materials of the positive electrode 109 and the negative electrode 110 have deteriorated compared to the initial stage, and (2) positive electrode 109 and positive and negative electrode SOC distribution, which is an index of how much the Li content of each material particle in the negative electrode 110 is distributed, and (3) potential shift which is an index of the amount of deviation of the potential position of the positive electrode 109 and the negative electrode 110.
  • An index that can describe in detail the deterioration state inside the cell 108 such as the amount, that is, an index I2 related to the deterioration state of the cell 108 is calculated.
  • the index I2 regarding the deterioration state is transmitted to the database server 201 outside the power storage system 100 using the server transmission unit 104 together with the information I1 regarding the operation condition of the cell 108.
  • the database server 201 is coupled to each power storage device 101.
  • the database server 201 and each power storage device 101 are connected to each other via a wireless communication network so as to be capable of bidirectional communication.
  • the database server 201 uses, as basic data, A) initial basic data of cells 108 used in each power storage device 101 (such as a specific capacity-voltage curve of a positive electrode material and a negative electrode material), and B) used for each power storage device 101. It possesses a deterioration database (such as continuous test results under a single condition) obtained at the laboratory level with deterioration characteristics corresponding to the usage status of the cell 108.
  • C is transmitted from the dynamic lifetime controller 102 of each power storage device 101 through the server transmission means 104 in a timely manner.
  • Actual data for each power storage device 101 (related to operating conditions of the cell 108 in each power storage device 101)
  • the deterioration database of the cell 108 used in each power storage device 101 is updated as needed. That is, the database server 201 knows the operating conditions of the cell 108 and the deterioration state of the cell 108 before the update in the plurality of cells 108.
  • the database server 201 uses the above basic data and actual data as a basis for comparing and verifying the deterioration state of the cell 108 under a certain actual use condition and the deterioration state of the cell 108 under another actual use condition.
  • a life prediction relationship such as a life prediction formula corresponding to a change in operating conditions for each power storage device 101 (cell 108) is constructed by performing multivariate analysis on the deteriorated database, and the dynamic life controller 102 of each power storage device 101.
  • the server transmission means 104 receives the life prediction formula from the database server 201 and transfers the life prediction formula to the dynamic life controller 102.
  • a causal relationship of deterioration in a certain power storage device can be estimated, and the causal relationship can be applied to another power storage device.
  • changes in the operating conditions of the cell 108 include changes in the charge / discharge rate, average potential, ⁇ SOC, temperature, and the like of the cell 108.
  • the dynamic life controller 102 of each power storage device 101 receives the life prediction formula corresponding to the change in the operation condition of the cell 108 from the database server 201, and then gives the operator operating the power storage device 101 the current deterioration state of the cell 108. And a future characteristic deterioration prediction (assumed life) based on the operation condition and life prediction formula of the cell 108 specified by the operator.
  • the power storage device 101 is controlled based on the dialogue between the operator who specifies the operation condition of the cell 108 and the dynamic lifetime controller 102.
  • the operator confirms the operation condition and characteristic deterioration prediction of the designated cell 108, changes the operation condition if necessary, and causes the dynamic life controller 102 to display the characteristic deterioration prediction again.
  • the dynamic lifetime controller 102 matches the characteristic deterioration prediction of the cell 108 with the operation condition of the designated cell 108, and the power storage device 101 (cell 108).
  • the dynamic lifetime controller 102 controls the average potential and maximum / average current of the cell 108 through the main control circuit 103 based on the above characteristic deterioration prediction, or through the power converter 107.
  • the voltage or current of the cell 108 is converted, or the average temperature of the cell 108 is controlled through the cooling device 106.
  • all the cells 108 include cells including the third electrode 111 and the positive and negative electrode potential measuring means 114.
  • the cells are connected in series. If the third cell 111 and the positive / negative potential measuring means 114 are included in one representative cell 108 in units, the internal state of the cell 108 may be described in detail.
  • the third electrode 111 and the positive / negative electrode potential measuring unit 114 are provided in the cell 108 being used, and the internal state of the cell 108 is determined by the dynamic life controller 102. Is calculated and stored in the database server 201 together with the operating conditions of the cell 108, and is compared and verified including information from other power storage devices 101. A life prediction formula corresponding to a change in operation conditions is constructed, the life prediction formula is distributed to the dynamic life controller 102, and the operation conditions of the power storage device 101 are changed in a timely manner by operator confirmation.
  • Example 2 This example is the same as Example 1 except for the following points.
  • FIG. 3 the block diagram of the electrical storage system 200 in a present Example is shown.
  • the power storage system 200 includes a database server 201 together with a plurality of power storage devices 101. Since this database server 201 is operating as a dedicated database server for the power storage system 200 as a constituent member of the power storage system 200, it is frequently used for updating the deterioration database and constructing a life prediction formula without being used for other operations. Therefore, the life prediction formula can be constructed with higher accuracy.
  • FIG. 4 shows a block diagram of the power storage system in the present embodiment.
  • FIG. 5 shows a block diagram of the cell 108 in this embodiment. The contents of this embodiment may be applied to the first embodiment.
  • the cell 108 in this embodiment includes a positive electrode 109, a negative electrode 110, a positive electrode terminal 112, a negative electrode terminal 113, a third electrode 115 that also serves as a Li ion supply source, and positive and negative electrode potential measurement and Li ion supply control means 116.
  • the third electrode 115 that also serves as a Li ion supply source in this embodiment uses lithium iron phosphate as a material.
  • the third electrode 115 serving also as the Li ion supply source is set in the cell 108 as an electrode using a larger amount of material than in Example 2, and normally acts as the third electrode to measure the potential of the positive and negative electrodes. Use as a means.
  • the Li ion supply source is also used by the positive / negative electrode potential measurement and the Li ion supply control means 116.
  • the third electrode 115 and the negative electrode 110 By electrically connecting the third electrode 115 and the negative electrode 110, it is possible to supply Li ions to the negative electrode 110 and correct the relative positional deviation to improve the capacity retention rate.
  • the third electrode 115 which also serves as a Li ion supply source, and the positive electrode 109, Li ions may be supplied to the positive electrode 109 to correct the relative positional deviation and improve the capacity retention rate.
  • the controller transmission unit 117 transmits a signal for supplying Li ions to the positive electrode 109 or the negative electrode 110 to the Li ion supply unit 116.
  • the signal from the dynamic lifetime controller 102 represents a result of determining that Li ions should be supplied to the positive electrode 109 or the negative electrode 110.
  • the dynamic life controller 102 indicates the life prediction to the operator using the life prediction formula and Li ions are supplied as one option of the life prediction.
  • a signal from the life controller 102 is activated.
  • FIG. 9 is a diagram for explaining the effect of improving cell degradation in the third embodiment.
  • the present embodiment has the positive and negative electrode potential measurement and the Li ion supply control means 116 which are means for recovering the capacity retention rate, the characteristic life and assumed replacement life of the cell 108 are provided. Can be matched, preferably matched.
  • the line having a capacity maintenance rate lower than the ideal line has a safety factor of about 1, but has been operated more severely than expected, and the deterioration of the cell 108 has progressed more than expected. Even in the case where there is a failure, the capacity maintenance rate is recovered by operating the positive / negative electrode potential measurement and the Li ion supply control means 116 to recover the expected life.
  • FIG. 7 illustrates the operation procedure of the dynamic life controller and the database server in this embodiment. The contents of this embodiment may be applied to the second embodiment.
  • the point that the indicator I2 regarding the deterioration state is transmitted to the database server 201 outside the power storage system 100 using the server transmission unit 104 together with the information I1 regarding the operation condition of the cell 108 is the same as in the first embodiment.
  • the life prediction formula corresponding to the change in the operation condition of the cell 108 constructed by the database server 201 is not transferred to the dynamic life controller 102 of each power storage device 101 but stored in the database server 201. Yes.
  • the database server 201 predicts the expected life of the cell 108 based on the life prediction formula.
  • the dynamic life controller 102 of each power storage device 101 receives the expected life (characteristic deterioration) prediction result of the cell 108 using the latest life prediction formula and sends it to the operator. indicate.
  • the operator operating the power storage device 101 changes the operating condition of the cell 108
  • the dynamic lifetime controller 102 of each power storage device 101 transfers the changed operating condition of the cell 108 to the database server 201.
  • the database server 201 predicts the expected life of the cell 108 in response to the transferred change in the operating conditions of the power storage device 101, and then transmits the prediction result to the dynamic life controller 102.
  • the dynamic lifetime controller 102 displays the current deterioration state of the cell 108 and the received prediction result of the cell 108 to the operator.
  • the operator confirms the operation condition of the designated cell 108 and the prediction of characteristic deterioration of the cell 108, and repeats the change of the operation condition of the cell 108 if necessary.
  • the dynamic lifetime controller 102 operates the power storage device 101 under the specified operating condition of the cell 108. Thereby, the update frequency of a lifetime prediction formula can be made high.
  • the dynamic lifetime controller 102 passes through the main control circuit 103, the average potential and maximum / average current of the cell 108, and the average temperature of the cell 108 through the cooling device 106.
  • the operating conditions are controlled.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

Selon l'invention, dans un système de stockage d'électricité utilisant une batterie rechargeable, l'état de dégradation d'une batterie rechargeable est déterminé précisément, et la durée de vie estimée du système de stockage d'électricité et la durée de vie estimée de la batterie rechargeable sont rapprochées l'une de l'autre. Le système de stockage d'électricité comprend une pluralité de dispositifs de stockage d'électricité. Tout dispositif de stockage d'électricité de la pluralité de dispositifs de stockage d'électricité comprend une cellule, un moyen de mesure de niveau de tension d'électrode positive/négative, et un régulateur de durée de vie dynamique. La cellule est une batterie rechargeable équipée d'une électrode positive et d'une électrode négative. Le moyen de mesure de niveau de tension d'électrode positive/négative mesure les niveaux de tension des électrodes positive et négative de la cellule, qui sont transmis à un serveur de base de données en tant qu'informations de niveau de tension. Dans le serveur de base de données, une base de données concernant une estimation de durée de vie de cellule correspondant à un changement des conditions de fonctionnement de la cellule est construite à partir des informations de niveau de tension. Le régulateur de durée de vie dynamique commande la pluralité des dispositifs de stockage d'électricité pour que leur durée de vie soit proche d'une durée de vie de cellule estimée basée sur la base de données associée à l'estimation de durée de vie de cellule.
PCT/JP2013/074457 2013-09-11 2013-09-11 Système de stockage d'électricité WO2015037068A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107380004A (zh) * 2017-09-07 2017-11-24 苏州易信安工业技术有限公司 一种电动车辆电池管理方法、装置及系统
WO2021192394A1 (fr) * 2020-03-23 2021-09-30 株式会社日立製作所 Dispositif de batterie secondaire et procédé de commande de batterie secondaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06290817A (ja) * 1993-04-01 1994-10-18 Hitachi Ltd 二次電池装置
JP2009017752A (ja) * 2007-07-09 2009-01-22 Panasonic Corp バッテリ制御装置
JP2011189768A (ja) * 2010-03-12 2011-09-29 Hitachi Ltd ハイブリッド車両の制御装置
JP2013045507A (ja) * 2011-08-22 2013-03-04 Hitachi Ltd 二次電池制御システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06290817A (ja) * 1993-04-01 1994-10-18 Hitachi Ltd 二次電池装置
JP2009017752A (ja) * 2007-07-09 2009-01-22 Panasonic Corp バッテリ制御装置
JP2011189768A (ja) * 2010-03-12 2011-09-29 Hitachi Ltd ハイブリッド車両の制御装置
JP2013045507A (ja) * 2011-08-22 2013-03-04 Hitachi Ltd 二次電池制御システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107380004A (zh) * 2017-09-07 2017-11-24 苏州易信安工业技术有限公司 一种电动车辆电池管理方法、装置及系统
WO2021192394A1 (fr) * 2020-03-23 2021-09-30 株式会社日立製作所 Dispositif de batterie secondaire et procédé de commande de batterie secondaire

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