Battery system and its charge / discharge control method

Abstract

To provide a battery system capable of restricting charge / discharge of the battery system by detecting, in advance, battery modules of different specifications from each other or a battery module containing defective battery cells.SOLUTION: A battery system according to one embodiment may include a plurality of battery modules electrically connected to each other, and a first control unit to: obtain module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules; receive battery module information including specification information for each of the plurality of battery modules from an external server by using the module identification information; and restrict charge / discharge of the plurality of battery modules according to the battery module information.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a battery system and a charge / discharge control method thereof.

Background Art

[0002] A secondary battery is different from a primary battery that provides only irreversible conversion of chemical substances into electrical energy in that charging and discharging can be repeated. A low-capacity secondary battery is used as a power supply for small electronic devices such as mobile phones, notebook computers, and camcorders, and a high-capacity secondary battery is used as a power supply for an energy storage system (ESS) that uses medium- and large-sized batteries used for electric vehicles (EVs), hybrid vehicles (HVs), or for home or industrial use, or an uninterruptible power supply (UPS) system.

[0003] Generally, a secondary battery cell includes an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, a case that houses the electrode assembly, and electrode terminals that are electrically connected to the electrode assembly. An electrolytic solution is injected into the case to enable charging and discharging of the battery cell through the electrochemical reaction of the positive electrode, the negative electrode, and the electrolyte solution. The shape of the case, such as cylindrical or rectangular, varies depending on the use of the battery cell.

[0004] Battery cells can be connected in series and / or in parallel with each other to form a battery module having a high energy density. Also, battery modules can be connected in series and / or in parallel with each other according to required specifications to form a battery pack, a battery rack, and the like.

[0005] During the assembly process of battery modules, or during the replacement or repair of battery modules, it is possible that a single battery pack / battery rack may contain battery modules with different specifications (e.g., capacity, active material, internal resistance, charge / discharge voltage curve, etc.). Furthermore, battery modules containing defective battery cells generated during the manufacturing process may be released without being recovered and used in battery packs / battery racks. Therefore, battery packs / battery racks that mix battery modules with different specifications or use battery modules containing defective battery cells may pose safety problems during charging and discharging, and thus charging and discharging must be restricted. [Overview of the project] [Problems that the invention aims to solve]

[0006] The objective of this embodiment is to provide a battery system and a charge / discharge control method therefor that can detect in advance if battery modules with different specifications are mixed within the battery system, or if a battery module contains a defective battery cell, and limit the charging and discharging of the battery system. [Means for solving the problem]

[0007] A battery system according to one embodiment for solving the above problem may include a plurality of battery modules electrically connected to each other, a first control device that obtains module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules, receives battery module information containing specification information for each of the plurality of battery modules from an external server using the module identification information, and limits the charging and discharging of the plurality of battery modules using the battery module information.

[0008] The first control device can detect battery modules with different specifications from among the plurality of battery modules based on the battery module information, and if a battery module with different specifications is detected, it can prohibit charging and discharging of the plurality of battery modules.

[0009] The aforementioned specification information may include at least one of the following: the capacity, active material, and charge / discharge characteristics of the corresponding battery module.

[0010] The first control device acquires state information for each of the plurality of battery modules, and if it determines that all of the plurality of battery modules have the same specifications, it can control the charging and discharging of the plurality of battery modules based on the state information.

[0011] The status information may include information on at least one of the voltage, temperature, and current of the corresponding battery module.

[0012] The aforementioned battery module information may further include inspection result information for the corresponding battery module.

[0013] The first control device can detect, based on the battery module information, a battery module among the plurality of battery modules that contains a defective battery cell, and if a battery module containing a defective battery cell is detected, it can prohibit charging and discharging of the plurality of battery modules.

[0014] The aforementioned inspection result information may be information obtained during the manufacturing of the multiple battery modules.

[0015] The aforementioned battery module information may further include usage history information for the corresponding battery module.

[0016] The first control device can use the module identification information to update the usage history information of the multiple battery modules stored on the external server.

[0017] Each of the plurality of battery modules may include a memory for storing module identification information, and a second control unit for acquiring state information for each of the plurality of battery modules and transmitting the state information or the module identification information to the first control unit.

[0018] The memory may be an EEPROM.

[0019] A charge / discharge control method according to one embodiment of a battery system including a plurality of electrically interconnected battery modules may include the steps of: obtaining module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules; receiving battery module information from an external server containing specification information for each of the plurality of battery modules using the module identification information; and limiting the charge / discharge of the plurality of battery modules using the battery module information.

[0020] The aforementioned restricting step may include a step of detecting a battery module with a different specification among the plurality of battery modules based on the battery module information, and a step of prohibiting the charging and discharging of the plurality of battery modules when a battery module with a different specification is detected.

[0021] In the charge / discharge control method, the specification information may include at least one of the capacity, active material, and charge / discharge characteristics of the corresponding battery module.

[0022] The charge and discharge control method may further include a step of obtaining state information for each of the plurality of battery modules. The limiting step may further include a step of controlling the charge and discharge of the plurality of battery modules based on the state information when it is determined that all of the plurality of battery modules have the same specification. The state information may include information on at least one of the voltage, temperature, and current of the corresponding battery module.

[0023] In the charge and discharge control method, the battery module information may further include inspection result information of the corresponding battery module. The limiting step may include a step of detecting a battery module including a defective battery cell among the plurality of battery modules based on the battery module information, and a step of prohibiting the charge and discharge of the plurality of battery modules when the battery module including the defective battery cell is detected.

[0024] In the charge and discharge control method, the inspection result information may be information obtained during the manufacture of the plurality of battery modules.

[0025] In the charge and discharge control method, the battery module information may further include usage history information of the corresponding battery module. The charge and discharge control method may further include a step of updating the usage history information of the plurality of battery modules stored in the external server using the module identification information.

Advantages of the Invention

[0026] According to the embodiment, when battery modules with different specifications are mixed in a battery system or a battery module including a defective battery cell is included, it is possible to prevent the occurrence of safety problems by detecting this in advance and restricting the charge and discharge of the battery system.

Brief Description of the Drawings

[0027] [Figure 1] Schematically shows a battery system according to an embodiment. [Figure 2] Schematically shows a battery module according to an embodiment. [Figure 3] Schematically shows a charge / discharge control method for a battery system according to an embodiment.

Mode for Carrying Out the Invention

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the operation effects and the implementation methods according to the embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same elements, and redundant descriptions are omitted. However, the present invention can be embodied in various forms and should not be construed as being limited only to the embodiments illustrated herein. Rather, these embodiments are provided as examples so that this disclosure can be thorough and complete, and can fully convey the aspects and features of the present invention to those skilled in the art.

[0029]

[0030] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Also, when describing embodiments of the present invention, the use of "can" means "one or more embodiments of the present invention". In the following description of the embodiments of the present invention, terms in the singular form can include the plural form unless the context clearly dictates otherwise.

[0031] Terms including ordinal numbers such as "first," "second," and "third" are used to describe a variety of elements, but it should be understood that these elements should not be limited by these terms. These terms are used solely for the purpose of distinguishing one element from another. For example, the first element may be named the second element, and similarly, the second element may be named the first element without departing the scope of the invention. As used herein, the terms "and / or" include any and all combinations of one or more relatedly listed items. Expressions such as "at least one" precede the list of elements, modifying the overall list of elements but not the individual elements of the list.

[0032] The terms “substantially,” “approximately,” and similar terms used herein are used as approximations, not as terms of degree, to describe the inherent deviation of a measured or calculated value that can be recognized by a person of ordinary skill in the art. Furthermore, when the term “substantially” is used in combination with a feature that can be expressed using a numerical value, the term “substantial” indicates a range of + / - 5% of the value centered on that numerical value.

[0033] Where one component or layer is described as “on top of,” “connected to,” or “joined” another component or layer, “on top of,” “connected to,” and “joined” include all forms formed directly or through one or more other components or layers. Also, where one component or layer is described as being “between” two components or layers, it should be understood that it is either the sole component or layer between the two components or layers, or that one or more other components or layers are interposed between them.

[0034] Electrically connecting two components includes not only directly connecting the two components but also connecting them through other components. These other components may include switches, resistors, capacitors, etc. In describing embodiments, the term "connected" means electrically connected unless the term "directly connected" is used.

[0035] Figure 1 schematically shows a battery system according to one embodiment, and Figure 2 schematically shows a battery module according to one embodiment.

[0036] Referring to Figure 1, a battery system 1 according to one embodiment may include a plurality of battery modules 10-1, 10-2, ..., 10-n, and a main control unit 20.

[0037] Multiple battery modules 10-1, 10-2, ..., 10-n can be electrically connected to each other in series and / or in parallel. Referring to Figure 2, each battery module 10 may include multiple battery cells 11-1, 11-2, ..., 11-n and a module management device 12.

[0038] Multiple battery cells 11-1, 11-2, ..., 11-n can be electrically connected to each other in series and / or in parallel.

[0039] The module management device 12 can monitor the status (cell voltage, temperature, current, etc.) of multiple battery cells 11-1, 11-2, ..., 11-n and transmit the status information collected through monitoring to the main control device 20. The module management device 12 may include a control device 121 and a storage device 122.

[0040] The control device 121 can detect the status information of battery cells 11-1, 11-2, ..., 11-n contained in the corresponding battery module 10. The control device 121 can transmit the detected status information to the main control device 20. The control device 121 can also obtain module identification information of the corresponding battery module 10 from the storage device 122 and transmit this to the main control device 20. The status information or module identification information of each battery module 10 can be transmitted to the main control device 20 in a daisy-chain manner.

[0041] The storage device 122 may include volatile memory such as RAM (Random Access Memory). The volatile memory can temporarily store state information acquired by the control device 121. The storage device 122 may also include non-volatile memory such as EEPROM (Electrically Erasable and Programmable Read Only Memory). The non-volatile memory can store the module identification information of the battery module 10. The manufacturer can have the battery module 10's identification information stored in the non-volatile memory of the storage device 122 during manufacturing before shipping the battery module 10.

[0042] The module management device 12 may be a battery management system (BMS) installed in each battery module 10. The control device 121 may be an analog front end (AFE) included in the BMS.

[0043] Referring again to Figure 1, the main control unit 20 communicates with the control units 121 of the battery modules 10-1, 10-2, ..., 10-n to collect status information from the battery modules 10-1, 10-2, ..., 10-n. Based on the status information collected from the battery modules 10-1, 10-2, ..., 10-n, the main control unit 20 can control the charging and discharging of the battery modules 10-1, 10-2, ..., 10-n.

[0044] The main control unit 20 can also receive module identification information for each battery module from battery modules 10-1, 10-2, ..., 10-n. Based on the received module identification information, the main control unit 20 can receive battery module information for the battery modules 10-1, 10-2, ..., 10-n that constitute the battery system 1 from the manufacturer server 3.

[0045] Battery module information may include capacity information of the corresponding battery module. Battery module information may further include information on the capacity of the battery cells constituting the corresponding battery module, active materials (positive electrode, negative electrode, electrolyte, etc.), charge / discharge characteristics (internal resistance, charge / discharge voltage curve, etc.), and whether or not there are defects. Battery module information may further include usage history information of the corresponding battery module (number of charge / discharge cycles, lifespan, defect detection information, location information, etc.). Battery module information may be constructed based on specification information (capacity, active materials, charge / discharge characteristics, etc.) and inspection result information (e.g., whether or not a defective battery cell was detected) obtained during the manufacturing process of battery modules 10-1, 10-2, ..., 10-n. In addition, battery module information may be constructed based on history information (number of charge / discharge cycles, lifespan, defect detection information, location information, etc.) obtained from the battery system 1 in which battery modules 10-1, 10-2, ..., 10-n are installed.

[0046] The main control unit 20 can directly transmit identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 and receive battery module information for battery modules 10-1, 10-2, ..., 10-n in response. The main control unit 20 can also transmit identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 through an external device of the battery system 1 or a device on which the battery system 1 is installed, and receive battery module information for battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3. For example, if the battery system 1 is a battery rack constituting an Energy Storage System (ESS), the main control unit 20 can transmit identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 via an Energy Management System (EMS) (not shown) and receive battery module information for battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3. Alternatively, if the battery system 1 is a battery pack installed in an electric vehicle, the main control unit 20 can also transmit identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 via an Electronic Control Unit (ECU) (not shown) of the vehicle or a control unit of a charging station (not shown) and receive battery module information for battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3.

[0047] The main control unit 20 can determine whether the specifications (capacity, charge / discharge characteristics, active material, etc.) of the battery modules 10-1, 10-2, ..., 10-n that constitute the battery system 1 are identical, based on the battery module information received from the manufacturer server 3. The main control unit 20 can also determine, based on the received battery module information, whether any of the battery modules 10-1, 10-2, ..., 10-n that constitute the battery system 1 contain battery cells that were determined to be defective during the manufacturing or use process of the battery modules.

[0048] If the main control unit 20 determines that there is a battery module among the battery modules 10-1, 10-2, ..., 10-n that has different specifications from the other battery modules, or that there is a battery module that contains a defective battery cell, it can cut off the charging and discharging of the battery system 1 and restrict the use of the battery system 1.

[0049] When battery modules with different capacities, active materials, and charge / discharge characteristics are connected and used, charging and discharging are possible, but safety issues may arise during charging and discharging. Therefore, the main control unit 20 checks the battery module information of battery modules 10-1, 10-2, ..., 10-n before starting charging and discharging of the battery system 1, and can prohibit charging and discharging if battery modules with different specifications are present. Occasionally, battery modules containing defective battery cells generated during the manufacturing process may be released without being recovered, or battery modules containing battery cells determined to be defective during use may be distributed without being recovered. If charging and discharging is performed with defective battery cells present, safety issues may arise for the battery system 1. Therefore, the main control unit 20 checks the battery module information of battery modules 10-1, 10-2, ..., 10-n before starting charging and discharging of the battery system 1, and can prohibit charging and discharging if battery modules containing defective battery cells are present.

[0050] The main control unit 20 can also transmit warning information to a higher-level control unit (e.g., the ECU of an electric vehicle) recommending that charging or operation of the battery system 1 be prohibited if it determines that there is a battery module among the battery modules 10-1, 10-2, ..., 10-n that has different specifications from the other battery modules, or that there is a battery module that contains a defective battery cell.

[0051] The main control unit 20 can detect a faulty battery cell that has experienced an abnormal condition, such as an internal short circuit, based on the status information collected from battery modules 10-1, 10-2, ..., 10-n. When a faulty battery cell is detected, the main control unit 20 can update the battery module information of the corresponding battery module by transmitting the identification information of the battery module in which the faulty battery cell was detected and the detection information of the faulty battery cell to the manufacturer server 3. The main control unit 20 can also transmit the number of charge / discharge cycles, lifespan, fault detection information, etc., acquired during the use of battery modules 10-1, 10-2, ..., 10-n, along with the module identification information of each battery module 10-1, 10-2, ..., 10-n, to the manufacturer server 3 so that the usage history information of battery modules 10-1, 10-2, ..., 10-n stored in the manufacturer server 3 is updated. When the battery system 1 is mounted on a device (for example, an electric vehicle) or installed in a predetermined location, the main control unit 20 can also update the corresponding battery module information by transmitting location information that identifies the location of each battery module 10-1, 10-2, ..., 10-n, along with the module identification information of each battery module 10-1, 10-2, ..., 10-n, to the manufacturer server 3.

[0052] Figure 3 schematically shows a charge / discharge control method for a battery system 1 according to one embodiment. The charge / discharge control method in Figure 3 can be performed by the main control device 20 of the battery system 1, which was described with reference to Figures 1 and 2.

[0053] Referring to Figure 3, the main control unit 20 can obtain module identification information for each battery module 10 from the battery modules 10 that constitute the battery system 1 (S11). The module identification information may be stored in the storage device 122 (e.g., EEPROM) of the module management device 12 when the battery module 10 is shipped. The main control unit 20 can receive the module identification information stored in the storage device 122 from the module management device 12 of each battery module 10.

[0054] When the main control unit 20 obtains module identification information from the battery modules 10, it can obtain battery module information corresponding to each battery module 10 from the manufacturer server 3 based on this information (S12). In other words, the main control unit 20 can directly or indirectly transmit the module identification information obtained from the battery modules 10 to the manufacturer server 3 and receive battery module information from the manufacturer server 3 as a response.

[0055] The manufacturer of the battery modules 10 can store and manage the specifications (capacity, active material, charge / discharge characteristics, etc.) and inspection results (e.g., whether or not a defective battery cell was detected) of each battery module 10, which are obtained during the manufacturing process, on the manufacturer's server 3. The manufacturer can also continuously collect usage history information (charge / discharge cycles, lifespan, presence or absence of defects, device identification information, location information, etc.) of each battery module 10 from the battery system 1 in which battery modules 10-1, 10-2, ..., 10-n are installed, and update the battery module information stored on the manufacturer's server 3 based on this information.

[0056] The main control unit 20 can detect battery modules among the battery modules 10 that make up the battery system 1 that have different specifications from the other battery modules, based on the battery module information obtained from the manufacturer server 3 (S13). In other words, the main control unit 20 can detect battery modules among the battery modules 10 that have different specifications by comparing the battery module information of each battery module 10 with each other.

[0057] Furthermore, the main control unit 20 can also detect which battery modules among the battery modules 10 constituting the battery system 1 contain defective battery cells, based on the battery module information obtained from the manufacturer server 3 (S14). In other words, the main control unit 20 can check the battery module information of each battery module 10 to determine whether or not it contains defective battery cells.

[0058] If the main control unit 20 detects a battery module among the battery modules 10 that has different specifications from the other battery modules, or that contains a defective battery cell, it can interrupt the charging and discharging of the battery system 1 and restrict the use of the battery system 1 (S15).

[0059] On the other hand, the main control unit 20 can control the charging and discharging of all battery modules 10 that make up the battery system 1 based on status information collected from the battery modules 10, provided that all battery modules 10 have the same specifications and no battery modules contain defective battery cells (S16). Furthermore, when charging or discharging occurs in the battery modules 10, the main control unit 20 can update the usage history information for each battery module 10 stored in the manufacturer server 3 using the module identification information of each battery module 10 (S17). In other words, when charging or discharging occurs in the battery modules 10, the main control unit 20 can update the usage history information for each battery module 10 stored in the manufacturer server 3 by transmitting the number of charge / discharge cycles and other information along with the module identification information of each battery module 10 to the manufacturer server 3.

[0060] The electronic or electrical devices and / or any other related devices or components according to the embodiments described herein may be embodied using any suitable hardware, firmware (e.g., application-specific integrated circuit), software, or a combination of software, firmware, and hardware. For example, the various components of these devices may be formed on a single integrated circuit (IC) chip or on individual IC chips. Alternatively, the various components of these devices may be embodied on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or a single substrate. The electrical connections or interconnections described herein may be embodied, for example, by wiring or conductive elements on a PCB or other type of circuit carrier. Conductive elements may include, for example, metallizations such as surface metallizations and / or pins, and may include conductive polymers or ceramics. Electrical energy may also be transmitted, for example, through electromagnetic radiation or wireless connections utilizing light.

[0061] Furthermore, the diverse components of these devices may be processes or threads that run on one or more processors, within one or more computing devices, execute computer program instructions, and interact with other system components in order to perform the diverse functions described herein. Computer program instructions are stored in memory that can be embodied in computing devices using standard memory devices, such as random access memory (RAM). Computer program instructions may also be stored in other non-transitory computer-readable media, such as CD-ROMs and flash drives.

[0062] Furthermore, those skilled in the art should recognize that the functions of various computing devices can be combined or integrated into a single computing device, or that the functions of a particular computing device can be distributed across one or more other computing devices without departing from the scope of the exemplary embodiments of the present invention.

[0063] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concepts of the present invention as defined in the claims also fall within the scope of the present invention. [Explanation of symbols]

[0064] 1: Battery System 10, 10-1, 10-2, ..., 10-n: Battery module 11-1, 11-2, ..., 11-n: Battery cells 12: Module Management Device 121: Control device 122: Storage device 20: Main control unit 3: Manufacturer server

Claims

1. Multiple battery modules that are electrically connected to each other, and A battery system including a first control device that obtains module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules, uses the module identification information to receive battery module information containing specification information for each of the plurality of battery modules from an external server, detects battery modules with different specifications from the plurality of battery modules based on the battery module information, detects battery modules with different specifications or battery modules containing defective battery cells, and if a battery module containing defective battery cells is detected, restricts the charging and discharging of the plurality of battery modules.

2. The battery system according to claim 1, wherein the specification information includes at least one of the capacity, active material, and charge / discharge characteristics of the corresponding battery module.

3. The first control device acquires status information for each of the plurality of battery modules, and when it is determined that all of the plurality of battery modules have the same specifications, it controls the charging and discharging of the plurality of battery modules based on the status information. The battery system according to claim 1, wherein the state information includes information for at least one of the voltage, temperature, and current of the corresponding battery module.

4. The aforementioned battery module information further includes inspection result information for the corresponding battery module, The battery system according to claim 1, wherein the inspection result information is information obtained during the manufacturing of the plurality of battery modules.

5. Multiple battery modules that are electrically connected to each other, and The first control device includes: obtaining module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules; using the module identification information, receiving battery module information containing specification information for each of the plurality of battery modules from an external server; detecting battery modules with different specifications among the plurality of battery modules based on the battery module information; detecting battery modules with different specifications or battery modules containing defective battery cells; and, if a battery module containing defective battery cells is detected, restricting the charging and discharging of the plurality of battery modules. The aforementioned battery module information further includes usage history information for the corresponding battery module, The first control device updates the usage history information of the plurality of battery modules stored on the external server using the module identification information, in a battery system.

6. Each of the aforementioned plurality of battery modules is The memory for storing the module identification information, and The battery system according to claim 1, further comprising a second control device that acquires state information for each of the plurality of battery modules and transmits the state information or the module identification information to the first control device.

7. The battery system according to claim 6, wherein the memory is an EEPROM.

8. A method for controlling the charging and discharging of a battery system including a plurality of electrically interconnected battery modules, Steps include obtaining module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules, The step of receiving battery module information from an external server, which includes the specification information for each of the multiple battery modules, using the module identification information. A charge / discharge control method that includes the steps of detecting battery modules with different specifications from among the plurality of battery modules based on the battery module information, detecting a battery module with different specifications or a battery module containing a defective battery cell, and if a battery module containing a defective battery cell is detected, restricting the charging and discharging of the plurality of battery modules.

9. The charge-discharge control method according to claim 8, wherein the specification information includes at least one of the capacity, active material, and charge-discharge characteristics of the corresponding battery module.

10. The process further includes the step of acquiring state information for each of the aforementioned plurality of battery modules, The aforementioned restrictive step is, If it is determined that all of the aforementioned battery modules have the same specifications, the process further includes a step of controlling the charging and discharging of the aforementioned battery modules based on the status information. The charge / discharge control method according to claim 8, wherein the state information includes information for at least one of the voltage, temperature, and current of the corresponding battery module.

11. The aforementioned battery module information further includes inspection result information for the corresponding battery module, The charge / discharge control method according to claim 8, wherein the inspection result information is information obtained during the manufacturing of the plurality of battery modules.

12. A method for controlling the charging and discharging of a battery system including a plurality of electrically interconnected battery modules, Steps include obtaining module identification information for each of the plurality of battery modules from a memory provided in each of the plurality of battery modules, The steps include receiving battery module information from an external server, which includes the specification information for each of the multiple battery modules, using the module identification information, and Based on the battery module information, the process includes detecting battery modules with different specifications from among the plurality of battery modules, detecting battery modules with different specifications or battery modules containing defective battery cells, and, if a battery module containing defective battery cells is detected, restricting the charging and discharging of the plurality of battery modules. The aforementioned battery module information further includes usage history information for the corresponding battery module, A charge / discharge control method further comprising the step of updating usage history information of the plurality of battery modules stored on the external server using the module identification information.

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