Battery system and charging / discharging control method thereof

Abstract

A battery system and a charge / discharge control method thereof are disclosed. The battery system includes: a plurality of battery modules electrically connected to each other, each of the plurality of battery modules including a memory; and a first controller for: obtaining module identification information for each of the plurality of battery modules from the memory of each of the plurality of battery modules; receiving battery module information including specification information for each of the plurality of battery modules from an external server based on the module identification information; and restricting charging / discharging of the plurality of battery modules according to the battery module information.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure relate to a battery system and a charge / discharge control method thereof. Background Art

[0002] Secondary batteries differ from primary batteries that only provide irreversible conversion of chemicals to electrical energy in that they can be repeatedly charged and discharged. Low-capacity secondary batteries are used as power supply devices for small electronic devices such as portable phones, laptop computers, and portable cameras. High-capacity secondary batteries are used as power supply devices for medium and large batteries for electric vehicles (EVs), hybrid vehicles (HVs), or energy storage systems (ESSs) or uninterruptible power supply (UPS) systems for home or industrial use.

[0003] In general, 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 housing for accommodating the electrode assembly; and an electrode terminal electrically connected to the electrode assembly. An electrolyte solution is injected into the housing to enable charging / discharging of the battery cell through an electrochemical reaction between the positive electrode, the negative electrode, and the electrolyte solution. The shape of the housing, such as a cylindrical shape or a rectangular shape, depends on the intended use of the battery cell.

[0004] The battery cells can be connected in series and / or in parallel to form a battery module with high energy density. In addition, a battery pack can include one or more of these battery modules according to desired specifications.

[0005] The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art. Summary of the invention

[0006] During the process of assembling battery modules or replacing or repairing battery modules, battery modules having specifications different from each other (e.g., capacity, active material, internal resistance, and / or charge / discharge voltage curve, etc.) may be included in one battery pack / battery rack. In addition, it may happen that battery modules containing defective battery cells generated during the manufacturing process are leaked without being recycled and used in the battery pack / battery rack. In this way, a battery pack / battery rack that mixes battery modules having specifications different from each other or uses battery modules containing defective battery cells may have safety problems during charging / discharging. Accordingly, it may be desirable to limit the charging / discharging of such a battery pack / battery rack.

[0007] One or more embodiments of the present disclosure are directed to a battery system and a charge / discharge control method of the battery system capable of limiting charge / discharge of the battery system by pre-detecting whether battery modules of different specifications from each other are mixed in the battery system or whether a battery module including a defective battery cell is included.

[0008] According to one or more embodiments of the present disclosure, a battery system includes: a plurality of battery modules electrically connected to each other, each of the plurality of battery modules including a memory; and a first controller configured to: obtain module identification information for each of the plurality of battery modules from the memory of 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 based on the module identification information; and limit charging / discharging of the plurality of battery modules according to the battery module information.

[0009] In an embodiment, the first controller may be further configured to: detect a battery module having different specifications from among the plurality of battery modules based on the battery module information; and prevent charging / discharging of the plurality of battery modules if the battery modules having different specifications are detected.

[0010] In an embodiment, the specification information may include information on at least one of a capacity, an active material, and charge / discharge characteristics of a corresponding battery module.

[0011] In an embodiment, the first controller may be further configured to: obtain status information for each of the plurality of battery modules; and if all of the plurality of battery modules have the same specifications as each other, control charging / discharging of the plurality of battery modules based on the status information. The status information may include information about at least one of voltage, temperature, and current of the corresponding battery module.

[0012] In an embodiment, the battery module information may further include test result information of the corresponding battery module; and the first controller may be further constructed to: detect a battery module containing a defective battery cell from among a plurality of battery modules based on the battery module information; and if a battery module containing a defective battery cell is detected, prevent charging / discharging of a plurality of battery modules.

[0013] In an embodiment, the test result information may be obtained during the manufacture of a plurality of battery modules.

[0014] In an embodiment, the battery module information may further include usage history information of the corresponding battery module; and the first controller may be further configured to update usage history information of the plurality of battery modules stored in the external server using the module identification information.

[0015] In an embodiment, each of the plurality of battery modules may include: a memory for storing module identification information; and a second controller configured to obtain status information for each of the plurality of battery modules and transmit the status information or the module identification information to the first controller.

[0016] In an embodiment, the memory may be an EEPROM.

[0017] According to one or more embodiments of the present disclosure, a charge / discharge control method for a battery system including a plurality of battery modules electrically connected to each other includes: obtaining module identification information for each of the plurality of battery modules from a memory of each of the plurality of battery modules; receiving battery module information including specification information for each of the plurality of battery modules from an external server using the module identification information; and limiting the charge / discharge of the plurality of battery modules according to the battery module information.

[0018] In an embodiment, the limiting may include: detecting a battery module having different specifications from among the plurality of battery modules based on the battery module information; and if the battery module having different specifications is detected, preventing the charging / discharging of the plurality of battery modules.

[0019] In an embodiment, the specification information may include information on at least one of a capacity, an active material, and charge / discharge characteristics of a corresponding battery module.

[0020] In an embodiment, the charging / discharging control method may further include: obtaining status information for each of the plurality of battery modules. The restriction may further include: if the plurality of battery modules are all determined to be of the same specification as each other, controlling the charging / discharging of the plurality of battery modules based on the status information, and the status information may include information about at least one of the voltage, temperature and current of the corresponding battery module.

[0021] In an embodiment, the battery module information may further include test result information of the corresponding battery module; and the restriction may include: detecting a battery module containing a defective battery cell from a plurality of battery modules based on the battery module information; and if a battery module containing a defective battery cell is detected, preventing the charging / discharging of a plurality of battery modules.

[0022] In an embodiment, the test result information may be obtained during the manufacture of a plurality of battery modules.

[0023] In an embodiment, the battery module information may further include usage history information of the corresponding battery module; and the charging / discharging control method may further include updating usage history information of the plurality of battery modules stored in the external server using the module identification information.

[0024] According to one or more embodiments of the present disclosure, if battery modules of different specifications are mixed in a battery system or if a battery module containing a defective battery cell is included, such a situation can be detected in advance to limit the charging / discharging of the battery system, thereby preventing or substantially preventing safety problems from occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other aspects and features of the present disclosure will be more clearly understood from the following detailed description of illustrative, non-limiting embodiments with reference to the accompanying drawings.

[0026] Figure 1 A battery system according to one or more embodiments is schematically illustrated.

[0027] Figure 2 A battery module according to one or more embodiments is schematically illustrated.

[0028] Figure 3 A charge / discharge control method of a battery system according to one or more embodiments is schematically illustrated.

[0029] Description of the symbol

[0030] 1: Battery system

[0031] 10, 10-1, 10-2, ..., 10-n: battery module

[0032] 11, 11-1, 11-2, ..., 11-n: battery cells

[0033] 12: Module management device

[0034] 121: Controller

[0035] 122: Storage Devices

[0036] 20: Main controller

[0037] 3: Manufacturer Server DETAILED DESCRIPTION

[0038] Hereinafter, embodiments will be described in more detail with reference to the accompanying drawings, in which the same reference numerals always refer to the same elements. However, the present disclosure may be implemented in various forms and should not be construed as being limited to the embodiments illustrated herein. On the contrary, these embodiments are provided as examples so that the present disclosure will be thorough and complete, and will fully convey the aspects and features of the present disclosure to those skilled in the art. Accordingly, processes, elements and techniques that are unnecessary for those of ordinary skill in the art to fully understand the aspects and features of the present disclosure may not be described. Unless otherwise stated, in the entire drawings and written descriptions, the same reference numerals represent the same elements, and therefore their redundant descriptions may not be repeated.

[0039] When a certain embodiment can be implemented differently, the specific process order may be different from the described order. For example, two processes described successively may be performed simultaneously or substantially simultaneously or in the reverse order of the described order.

[0040] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, region, layer or part described below may be referred to as a second element, component, region, layer or part.

[0041] It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly on, directly connected to, or directly coupled to the other element or layer, or there may be one or more intervening elements or layers. Similarly, when a layer, region, or element is referred to as being "electrically connected to" another layer, region, or element, it may be directly electrically connected to the other layer, region, or element, and / or may be indirectly electrically connected with one or more intervening layers, regions, or elements (e.g., switches, resistors, and / or capacitors, etc.) located therebetween. Additionally, it will be understood that when an element or layer is referred to as being "between" two elements or layers, it may be the only element or layer between the two elements or layers, or there may also be one or more intervening elements or layers.

[0042] The terms used herein are used to describe the purpose of a particular embodiment, and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "one" and "a" are intended to also include plural forms. It will be further understood that when the terms "include", "comprise", "have" and their variations are used in this specification, the existence of the stated features, wholes, steps, operations, elements and / or parts is indicated, but the existence or addition of one or more other features, wholes, steps, operations, elements, parts and / or their groups is not excluded. As used in this article, the term "and / or" includes any combination and all combinations of one or more associated listed items. For example, the statement "A and / or B" means A, B or A and B. When a statement such as "at least one of ..." is after the list of elements, the entire list of elements is modified without modifying the individual elements of the list. For example, the statement "at least one of a, b and c" and "at least one of the group consisting of a, b and c" indicates only a, only b, only c, a and b both, a and c both, b and c both, a, b and c all and their variations.

[0043] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation rather than as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that would be recognized by a person of ordinary skill in the art. Additionally, when the term "substantially" is used in combination with a feature that can be represented using a numerical value, the term "substantially" may refer to a range of + / - 5% of a value centered on that numerical value. Furthermore, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure." As used herein, the term "using" and variations thereof may be considered synonymous with the term "utilizing" and variations thereof, respectively.

[0044] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and / or this specification, and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0045] Figure 1 A battery system 1 according to one or more embodiments is schematically illustrated. Figure 2 A battery module 10 according to one or more embodiments is schematically illustrated.

[0046] Reference Figure 1The battery system 1 according to the embodiment may include a plurality of battery modules (eg, a plurality of batteries) 10 - 1 , 10 - 2 , . . . , 10 - n and a main controller 20 , where n is a natural number greater than 1.

[0047] The plurality of battery modules 10-1, 10-2, ..., 10-n may be electrically connected to each other in series and / or in parallel. Figure 2 Each battery module 10 may include a plurality of battery cells 11 - 1 , 11 - 2 , . . . , 11 - n and a module management device 12 .

[0048] The plurality of battery cells 11 - 1 , 11 - 2 , . . . , 11 - n may be electrically connected to each other in series and / or in parallel.

[0049] The module management device 12 may monitor the status of the plurality of battery cells 11-1, 11-2, . . . , 11-n (eg, battery cell voltage, temperature and / or current, etc.), and may send status information collected through monitoring to the main controller 20. The module management device 12 may include a controller 121 and a storage device 122.

[0050] The controller 121 may detect status information of the battery cells 11-1, 11-2, ..., 11-n included in the corresponding battery module 10. The controller 121 may transmit the detected status information to the main controller 20. The controller 121 may also obtain module identification information (hereinafter, also referred to as identification information) of the corresponding battery module 10 from the storage device 122, and may transmit the module identification information to the main controller 20. The status information and / or module identification information of each battery module 10 may be transmitted to the main controller 20 in a daisy chain method.

[0051] The storage device 122 may include a volatile memory such as a random access memory (RAM). The volatile memory may temporarily store state information obtained by the controller 121. The storage device 122 may also include a nonvolatile memory such as an electrically erasable and programmable read-only memory (EEPROM). The nonvolatile memory may store module identification information of the battery module 10. When manufacturing the battery module 10, the manufacturer may store the identification information of the battery module 10 in the nonvolatile memory of the storage device 122, and then the battery module 10 may be shipped.

[0052] The module management device 12 may be a battery management system (BMS) mounted on each battery module 10. In addition, the controller 121 may be an analog front end (AFE) included in the BMS.

[0053] Reference Figure 1The main controller 20 may communicate with the controller 121 of the battery modules 10-1, 10-2, ..., 10-n and collect status information from the battery modules 10-1, 10-2, ..., 10-n. The main controller 20 may control the charging / discharging of 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.

[0054] The main controller 20 may also receive module identification information of each battery module from the battery modules 10-1, 10-2, ..., 10-n. The main controller 20 may receive battery module information of the battery modules 10-1, 10-2, ..., 10-n configuring the battery system 1 from the manufacturer server 3 based on the received module identification information.

[0055] The battery module information may include capacity information of the corresponding battery module. The battery module information may further include information about the capacity, active materials (e.g., positive electrode, negative electrode and / or electrolyte, etc.), charge / discharge characteristics (e.g., internal resistance and / or charge / discharge voltage curve, etc.) and / or defect status of the battery cells that construct the corresponding battery module. The battery module information may further include usage history information (hereinafter, also referred to as history information) of the corresponding battery module (e.g., charge / discharge cycles, cycle life, defect detection information and / or location information, etc.). The battery module information may be constructed based on specification information (e.g., capacity, active materials and / or charge / discharge characteristics, etc.) and test result information (e.g., whether a defective battery cell is detected) obtained during the manufacture of the battery modules 10-1, 10-2, ..., 10-n.

[0056] In addition, battery module information can also be constructed based on historical information (e.g., charge / discharge cycles, cycle life, defect detection information and / or location information, etc.) obtained from the battery system 1 at which (e.g., in or on which) the battery modules 10-1, 10-2, ..., 10-n are installed.

[0057] The main controller 20 may send identification information of the battery modules 10-1, 10-2, ..., 10-n directly to the manufacturer server 3, and may receive battery module information of the battery modules 10-1, 10-2, ..., 10-n in response thereto. The main controller 20 may send identification information of the battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3, and may receive battery module information of the battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3 through an external device of the battery system 1 or through a device on which the battery system 1 is installed.

[0058] For example, if the battery system 1 is a battery rack that constructs an energy storage system (ESS), the main controller 20 can send identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 through the energy management system (EMS), and can receive battery module information of battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3.

[0059] As another example, if the battery system 1 is a battery pack installed on an electric vehicle, the main controller 20 can send identification information of battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3 through the energy management system (EMS), and can receive battery module information of battery modules 10-1, 10-2, ..., 10-n from the manufacturer server 3.

[0060] The main controller 20 may determine whether the specifications (e.g., charge / discharge characteristics and / or active materials, etc.) of the battery modules 10-1, 10-2, ..., 10-n configuring the battery system 1 are the same or substantially the same as each other based on the battery module information received from the manufacturer server 3. In addition, the main controller 20 may determine whether any of the battery modules 10-1, 10-2, ..., 10-n configuring the battery system 1 includes a battery cell determined to be defective during the manufacturing process or use of the battery module based on the received battery module information.

[0061] If it is determined that any one of the battery modules 10 - 1 , 10 - 2 , . . . , 10 - n has different specifications from the other battery modules or any one of the battery modules contains a defective battery cell, the main controller 20 may prevent charging / discharging of the battery system 1 to limit the use of the battery system 1 .

[0062] If battery modules with different capacities, active materials and / or charge / discharge characteristics are connected to each other and used, charging / discharging may be possible, but safety problems may occur during charging / discharging. Therefore, the main controller 20 may check the battery module information of the battery modules 10-1, 10-2, ..., 10-n before starting the charging / discharging of the battery system 1, and if there are battery modules with specifications different from each other, charging / discharging may be prevented. It is often possible that a battery module containing a defective battery cell generated during the manufacturing process is leaked without being recycled or a battery module containing a battery cell determined to be defective during use is distributed without being recycled. If charging / discharging is performed with a defective battery cell, safety problems may occur in the battery system 1. Therefore, the main controller 20 may check the battery module information of the battery modules 10-1, 10-2, ..., 10-n before starting the charging / discharging of the battery system 1, and if there is a battery module containing a defective battery cell, charging / discharging may be prevented.

[0063] If it is determined that any one of the battery modules 10-1, 10-2, ..., 10-n has different specifications from the other battery modules or any one of the battery modules contains a defective battery cell, the main controller 20 may send a warning message suggesting charging prohibition or operation prohibition of the battery system 1 corresponding to a higher-level controller (e.g., the ECU of an electric vehicle).

[0064] The main controller 20 may detect a defective battery cell in which a state abnormality such as an internal short circuit has occurred based on the state information collected from the battery modules 10-1, 10-2, ..., 10-n. When a defective battery cell is detected, the main controller 20 may send the identification information of the battery module in which the defective battery cell is detected and the detection information of the defective battery cell to the manufacturer server 3, so that the corresponding battery module information of the battery module may be updated. The main controller 20 may send the charge / discharge cycle, cycle life and / or defect detection information obtained during the use of the battery modules 10-1, 10-2, ..., 10-n, etc. together with the module identification information of each of the battery modules 10-1, 10-2, ..., 10-n to the manufacturer server 3, so that the use history information of the battery modules 10-1, 10-2, ..., 10-n stored in the manufacturer server 3 can be updated.

[0065] When the battery system 1 is installed on a device (e.g., an electric vehicle) or the battery system 1 is installed in a desired location (e.g., a predetermined location), the main controller 20 can update the corresponding battery module information by sending location information that can identify the location of the battery modules 10-1, 10-2, ..., 10-n together with the module identification information of each battery module 10-1, 10-2, ..., 10-n to the manufacturer server 3.

[0066] Figure 3 A charge / discharge control method of the battery system 1 according to one or more embodiments is schematically illustrated. Figure 3 The charge / discharge control method can be referred to above Figure 1 and Figure 2 The main controller 20 of the battery system 1 described above is executed.

[0067] Reference Figure 3 , the main controller 20 may obtain the module identification information of each battery module 10 from the battery modules 10 configuring the battery system 1 (step S11). When the battery modules 10 are shipped, the module identification information may be stored in the storage device 122 (e.g., EEPROM) of the module management device 12. The main controller 20 may receive the module identification information stored in the storage device 122 from the module management device 12 of each battery module 10.

[0068] If the module identification information is obtained from the battery module 10, the main controller 20 may obtain the battery module information corresponding to each battery module 10 from the manufacturer server 3 based on the module identification information (step S12). In other words, the main controller 20 may directly or indirectly send the module identification information obtained from the battery module 10 to the manufacturer server 3, and may receive the battery module information in response thereto from the manufacturer server 3.

[0069] The manufacturer of the battery module 10 may store and manage specification information (e.g., capacity, active material and / or charge / discharge characteristics, etc.) and / or test result information (e.g., whether a defective battery cell is detected) of each battery module 10 obtained during the manufacture of each battery module 10 in the manufacturer server 3. In addition, the manufacturer may continuously collect usage history information (e.g., charge / discharge cycles, cycle life, defect status, device identification information and / or location information, etc.) of each battery module 10 from the battery system 1 at which (e.g., in or on which) the battery modules 10-1, 10-2, ..., 10-n are installed, and may update the battery module information stored in the manufacturer server 3 based on the information.

[0070] The main controller 20 may detect a battery module having a different specification from other battery modules from among the battery modules 10 configuring the battery system 1 based on the battery module information obtained from the manufacturer server 3 (step S13). In other words, the main controller 20 may detect a battery module having a different specification from among the battery modules 10 by comparing the battery module information of the battery modules 10 with each other.

[0071] In addition, the main controller 20 may detect a battery module including a defective battery cell from among the battery modules 10 configuring the battery system 1 based on the battery module information obtained from the manufacturer server 3 (step S14). In other words, the main controller 20 may check the battery module information of each battery module 10 to determine whether a defective battery cell is included.

[0072] If a battery module having a different specification from other battery modules or a battery module containing a defective battery cell is detected from the battery module 10 (for example, yes at step S13 or step S14), the main controller 20 can prevent the charging / discharging of the battery system 1 to limit the use of the battery system 1 (step S15).

[0073] On the other hand, if the specifications of all the battery modules 10 configuring the battery system 1 are the same or substantially the same as each other (e.g., No at step S13), and there is no battery module including a defective battery cell from among the battery modules 10 (e.g., No at step S14), the main controller 20 may control the charge / discharge of the battery module 10 based on the state information collected from the battery module 10 (step S16). In addition, if the charge / discharge of the battery module 10 continues, the main controller 20 may update the use history information of each of the battery modules 10 stored in the manufacturer server 3 using the module identification information of each of the battery modules 10 (step S17).

[0074] In other words, as the charging / discharging of the battery module 10 continues, the main controller 20 can send the charging / discharging cycle of each battery module 10 together with the module identification information to the manufacturer server 3 to update the usage history information of each of the battery modules 10 stored in the manufacturer server 3.

[0075] Any suitable hardware, firmware (e.g., application specific integrated circuit), software, or a combination of software, firmware, and hardware can be used to implement the electronic or electrical equipment and / or any other related equipment or component elements (e.g., main controller, manufacturer server, and / or module management device, etc.) according to the embodiments of the present disclosure described herein. For example, the various elements of the device can be formed on a single integrated circuit (IC) chip or a separate IC chip. In addition, the various elements of the device can be implemented as a flexible printed circuit film, a tape carrier package (TCP), or a printed circuit board (PCB), or can be implemented on a single substrate. The electrical connection or interconnection described in this specification can be implemented by wiring or conductive elements on a circuit carrier such as a PCB or other suitable types. The conductive element can include metallization such as surface metallization and / or pins, and can include conductive polymers or ceramics. Electrical energy can also be transmitted, for example, using electromagnetic radiation or light via a wireless connection.

[0076] In addition, the various configurations and elements of the device can be processes or threads that run on at least one processor and at least one computing device to perform the various functions described herein, execute computer program instructions, and interact with other system components. Computer program instructions are stored in a memory that can be implemented in a computing device using a standard memory device such as a random access memory (RAM). Computer program instructions can also be stored on other non-transitory computer-readable media such as CD-ROMs and flash drives.

[0077] In addition, one of ordinary skill in the art should recognize that the functionality of various computing devices may be combined or integrated into a single computing device, or the functionality of a particular computing device may be distributed across different computing devices without departing from the spirit and scope of the present disclosure.

[0078] The foregoing is an explanation of some embodiments of the present disclosure and should not be interpreted as limiting it. Although some embodiments have been described, it will be readily understood by those skilled in the art that various modifications are possible in the embodiments without departing from the spirit and scope of the present disclosure. It will be understood that, unless otherwise described, the description of the features or aspects within each embodiment should generally be considered to be applicable to other similar features or aspects in other embodiments. Therefore, as will be apparent to those of ordinary skill in the art, unless otherwise specifically noted, the features, characteristics and / or elements described in conjunction with a particular embodiment may be used alone or in combination with the features, characteristics and / or elements described in conjunction with other embodiments. Therefore, it should be understood that the foregoing is an explanation of various example embodiments and should not be interpreted as being limited to the specific embodiments disclosed herein, and various modifications to the disclosed embodiments and other example embodiments are intended to be included in the spirit and scope of the present disclosure as defined in the claims and their equivalents.

Claims

1. A battery system comprising: a plurality of battery modules electrically connected to each other, each of the plurality of battery modules comprising a memory; as well as The first controller is configured as follows: obtaining module identification information for each of the plurality of battery modules from the memory of each of the plurality of battery modules; receiving battery module information including specification information for each of the plurality of battery modules from an external server based on the module identification information; as well as The charging / discharging of the plurality of battery modules is restricted according to the battery module information.

2. The battery system according to claim 1, wherein: The first controller is further configured as follows: detecting a battery module having different specifications from among the plurality of battery modules based on the battery module information; and If the battery modules having different specifications are detected, charging / discharging of the plurality of battery modules is prevented.

3. The battery system according to claim 2, wherein: The specification information includes information on at least one of a capacity, an active material, and charge / discharge characteristics of a corresponding battery module.

4. The battery system according to claim 2, wherein: The first controller is further configured as follows: obtaining status information for each of the plurality of battery modules; and If all of the plurality of battery modules have the same specifications as each other, controlling charging / discharging of the plurality of battery modules based on the state information, and The status information includes information about at least one of voltage, temperature and current of the corresponding battery module.

5. The battery system of claim 1, wherein: The battery module information further includes test result information of the corresponding battery module; and The first controller is further configured as follows: detecting a battery module including a defective battery cell from among the plurality of battery modules based on the battery module information; as well as If the battery module including the defective battery cell is detected, charging / discharging of the plurality of battery modules is prevented.

6. The battery system according to claim 5, wherein: The test result information is obtained during manufacturing of the plurality of battery modules.

7. The battery system of claim 5, wherein: The battery module information further includes usage history information of the corresponding battery module; and The first controller is further configured to update usage history information of the plurality of battery modules stored in the external server using the module identification information.

8. The battery system according to claim 1, wherein: Each of the plurality of battery modules comprises: The memory is used to store the module identification information; and A second controller is configured to obtain status information for each of the plurality of battery modules and transmit the status information or the module identification information to the first controller.

9. The battery system according to claim 8, wherein: The memory is an EEPROM.

10. A charge / discharge control method for a battery system including a plurality of battery modules electrically connected to each other, the charge / discharge control method comprising: obtaining module identification information for each of the plurality of battery modules from a memory of each of the plurality of battery modules; receiving battery module information including specification information for each of the plurality of battery modules from an external server using the module identification information; as well as The charging / discharging of the plurality of battery modules is restricted according to the battery module information.

11. The charge / discharge control method according to claim 10, wherein: The limitations include: detecting a battery module having different specifications from among the plurality of battery modules based on the battery module information; and If the battery modules having different specifications are detected, charging / discharging of the plurality of battery modules is prevented.

12. The charge / discharge control method according to claim 11, wherein: The specification information includes information on at least one of a capacity, an active material, and charge / discharge characteristics of a corresponding battery module.

13. The charge / discharge control method according to claim 11, further comprising: obtaining status information for each of the plurality of battery modules; Wherein, the limiting further comprises: if the plurality of battery modules are all determined to be of the same specification as each other, controlling the charging / discharging of the plurality of battery modules based on the state information, and The status information includes information about at least one of voltage, temperature and current of the corresponding battery module.

14. The charge / discharge control method according to claim 10, wherein: The battery module information further includes test result information of the corresponding battery module; and The limitations include: detecting a battery module including a defective battery cell from among the plurality of battery modules based on the battery module information; and If the battery module including the defective battery cell is detected, charging / discharging of the plurality of battery modules is prevented.

15. The charge / discharge control method according to claim 14, wherein: The test result information is obtained during manufacturing of the plurality of battery modules.

16. The charge / discharge control method according to claim 10, wherein: The battery module information further includes usage history information of the corresponding battery module; and The charging / discharging control method further includes updating usage history information of the plurality of battery modules stored in the external server using the module identification information.

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