JP2021163650A - Battery module and battery module system - Google Patents

Abstract

To provide a battery module capable of being comprehended the degree of deterioration of battery cells without charging/discharging the battery module that is generated after disassembling the battery pack.SOLUTION: A battery module 1 including multiple battery cells c and a voltage measuring unit 10 that measures the voltage of each battery cell c, includes: a battery information processing unit 12 that calculates the degree of deterioration of each battery cell c based on the measurement result of a voltage measuring unit 10; a storage unit 13 that stores the degree of deterioration calculated by a battery information processing unit 12; and a transmission unit 14 capable of transmitting the degree of deterioration stored in the storage unit 13.SELECTED DRAWING: Figure 1

Description

The present invention relates to a battery module and a battery module system.

An electric vehicle or the like is equipped with a battery pack as shown in Patent Document 1, for example. The battery pack includes a battery module in which a plurality of battery cells are connected in series and modularized, and a battery management unit for controlling and managing these battery modules. Generally, a single battery pack contains a plurality of battery modules, which are controlled and managed by a single battery management unit.

Japanese Unexamined Patent Publication No. 2014-102248

In recent years, the number of vehicles equipped with a battery pack such as an electric vehicle has increased, and various methods for recycling and reusing the battery module included in the battery pack have been proposed. When the battery module is reused, for example, the battery module is mounted on another device or the like and used. On the other hand, when the battery module is recycled, the battery module is disassembled into battery cells and the like, and the battery cells are further disassembled and used as raw materials for other products. A battery module having a low degree of deterioration of a battery cell is generally reused, and a battery module including a battery cell having a high degree of deterioration is generally recycled.

However, in the battery pack disclosed in Patent Document 1, all the information indicating the state of the battery cell of each battery module is stored in the battery management unit. Therefore, when the battery pack is disassembled and the battery module is removed from the battery management unit, information indicating the degree of deterioration of the battery cell cannot be extracted. Therefore, in order to determine the degree of deterioration of the battery cells contained in the battery module after disassembly, it is necessary to charge / discharge the battery module with a charging / discharging device. As is well known, a charging / discharging device capable of charging / discharging many objects at the same time becomes a large one. Therefore, checking the state of all the battery modules of the waste battery pack, which is expected to be generated in large quantities in the future, with the charging / discharging device hinders efficient reuse of the battery modules.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it possible to grasp the degree of deterioration of a battery cell without charging / discharging the battery module generated after disassembling the battery pack.

The present invention employs the following configuration as a means for solving the above problems.

The first invention is a battery module including a plurality of battery cells and a voltage measuring unit for measuring the voltage of each of the battery cells, and based on the measurement result of the voltage measuring unit, the battery cells of each battery cell. It is said that it includes a deterioration estimation unit that calculates the degree of deterioration, a storage unit that stores the deterioration degree calculated by the deterioration estimation unit, and a transmission unit that can transmit the deterioration degree stored in the storage unit to the outside. Adopt the configuration.

In the second invention, in the first invention, the storage unit stores history information indicating a change with time of the battery cell in addition to the deterioration degree, and the transmission unit adds the deterioration degree to the deterioration degree. A configuration is adopted in which the above history information can be transmitted.

In the third invention, in the second invention, the history information includes temperature history information indicating a time-dependent temperature change of the battery cell, voltage history information indicating a time-dependent voltage change of the battery cell, and the above. A configuration is adopted in which at least one of the current history information indicating the change in current of the battery cell with time is used.

In the fourth invention, in the second or third invention, the deterioration estimation unit adopts a configuration in which the deterioration degree is corrected by the history information stored in the storage unit.

In the fifth aspect of the invention, in any one of the first to fourth inventions, the abnormality detecting unit for detecting the abnormality of the battery cell is provided, and the storage unit detects the abnormality in addition to the degree of deterioration. A configuration is adopted in which the abnormality information indicating the abnormality is stored, and the transmission unit can transmit the abnormality information in addition to the deterioration degree.

The sixth invention is a battery module system, which includes the battery module according to any one of the first to fifth inventions and a receiving unit capable of receiving a signal transmitted from the transmitting unit of the battery module. A mobile terminal is provided, and the mobile terminal adopts a configuration having a display unit that displays based on the signal received by the receiving unit.

In the present invention, the battery module stores the degree of deterioration of the battery cell, and the degree of deterioration can be transmitted to the outside. Therefore, in the present invention, even when the battery pack is disassembled and the battery module and the battery management unit are separated, the degree of deterioration of the battery cell can be taken out from the battery module. Therefore, it is possible to know the degree of deterioration of the battery cell contained in the battery module taken out from the battery pack without using a large charging / discharging device. Therefore, according to the present invention, it is possible to grasp the degree of deterioration of the battery cell without charging / discharging the battery module generated after disassembling the battery pack.

It is a block diagram which shows typically the schematic structure of the battery pack which comprises the battery module of this invention. It is a block diagram which shows typically the schematic structure of the battery module system S including the battery module of this invention. It is a flowchart for demonstrating operation of the battery module in the battery module system S of this invention.

Hereinafter, an embodiment of the battery module and the battery module system according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram schematically showing a schematic configuration of a battery pack P including the battery module 1 of the present embodiment. As shown in FIG. 1, the battery pack P is mounted on a vehicle such as an electric vehicle, and includes a plurality of battery modules 1, a connection line 2, a battery management unit 3, a current sensor 4, and a contactor 5. There is.

The battery module 1 includes an assembled battery 1a in which a plurality of battery cells c are connected in series, a temperature sensor 1b, and a battery monitoring device 1c. The battery module 1 is a module in which an assembled battery 1a, a temperature sensor 1b, a battery monitoring device 1c, and the like are integrally packaged by a housing (not shown), and is housed in a case (not shown) included in the battery pack P. There is.

In the assembled battery 1a, a plurality of battery cells c are connected in series as described above, and the positive terminal of the battery cell c arranged at the most positive end is the positive terminal of the assembled battery 1a, and the most negative side. The negative terminal of the battery cell c arranged at the end is the negative terminal of the assembled battery 1a. The positive and negative terminals of each battery cell c are connected to the battery monitoring device 1c via a transmission line. The temperature sensor 1b is arranged near the assembled battery 1a and outputs a signal indicating the temperature of the assembled battery 1a (that is, the temperature of the battery cell c).

The battery monitoring device 1c includes an equalization circuit 1d and a control processing unit 1e. The equalization circuit 1d is provided for each battery cell c and connects the positive terminal and the negative terminal of the battery cell c. Each equalization circuit 1d is connected in parallel to each battery cell c, and is a series circuit of the discharge resistor and the switching element. These equalization circuits 1d are circuits for equalizing the voltage of the battery cell c included in the assembled battery 1a, and the switching element is on / off controlled under the control of the control processing unit 1e. When the switching element is turned on, the current in the battery cell c is converted into heat by the discharge resistance, and the voltage in the battery cell c drops.

The control processing unit 1e includes hardware such as a CPU (Central Processing Unit), a memory, an A / D conversion circuit, and an input / output interface, and has a functional unit embodied by these hardware. In the present embodiment, the control processing unit 1e has a voltage measuring unit 10, a temperature measuring unit 11, a battery information processing unit 12 (deterioration estimation unit, an abnormality detecting unit), a storage unit 13, and a transmitting unit 14 as functional units. And a receiving unit 15 and an equalization processing unit 16.

The voltage measuring unit 10 receives a signal indicating the voltage (cell voltage) of the battery cell c input from the battery cell c via the transmission line, and the sample value is a measured value (measured value) that can be processed by the battery information processing unit 12. Output as cell voltage data). The voltage measuring unit 10 acquires and outputs cell voltage data of each of the plurality of battery cells c included in the assembled battery 1a. The temperature measuring unit 11 inputs a signal indicating the temperature of the battery cell c input from the temperature sensor 1b, and outputs the sample value as a measured value (temperature data) that can be processed by the battery information processing unit 12.

The battery information processing unit 12 calculates the degree of deterioration of each battery cell c based on the cell voltage data input from the voltage measuring unit 10. Here, the battery information processing unit 12 calculates SOH (States Of Health) as the degree of deterioration of the battery cell c. Note that SOH is an index showing the ratio of the fully charged capacity at the time of deterioration to the initial fully charged capacity. Therefore, for example, the battery information processing unit 12 calculates the current (at the time of deterioration) full charge capacity based on the cell voltage data, and compares it with the previously stored initial full charge capacity to obtain the battery cell c. Obtain SOH for each. In this way, the battery information processing unit 12 calculates the degree of deterioration of each battery cell c based on the measurement result of the voltage measuring unit 10.

The method of calculating the degree of deterioration in the battery information processing unit 12 is not limited to the method based on the full charge capacity. For example, the internal resistance value of the battery cell c can be estimated from the cell voltage and the current value of the battery cell c, and the SOH can be calculated from the degree of increase in the internal resistance value. Therefore, the battery information processing unit 12 calculates the internal resistance value of each battery cell c from the current data described later and the cell voltage data input from the current sensor 4 via the battery management unit 3, and the inside thereof. The SOH may be calculated based on the rate of increase of the resistance value from the initial value.

The internal resistance value of the battery cell c can be estimated more accurately by using the temperature of the battery cell c. Therefore, the battery information processing unit 12 may further add the temperature data input from the temperature sensor 1b to the cell voltage data and the current data to obtain the internal resistance value of the battery cell c.

Further, the SOH changes due to a change in temperature of the battery cell c over time, a change in cell voltage over time, and a change in current over time. Therefore, the battery information processing unit 12 has temperature history information indicating a time-dependent change in temperature data, voltage history information indicating a time-dependent change in cell voltage data, and current history indicating a time-dependent change in current data. Based on the information, the SOH calculated as described above may be corrected. As will be described later, in the battery module 1 of the present embodiment, temperature history information, voltage history information, and current history information are stored in the storage unit 13. Therefore, the battery information processing unit 12 corrects the SOH by using the temperature history information, the voltage history information, and the current history information stored in the storage unit 13.

Further, in the battery module 1 of the present embodiment, the battery information processing unit 12 detects an abnormality in the battery cell c, and when the abnormality is detected, an abnormality detection indicating that an abnormality has occurred in the battery cell c. Output data. For example, when one of the battery cells c is overcharged and a protection circuit (not shown) or the like is activated, the battery module 1 including the battery cell c cannot be used without being disassembled thereafter. Therefore, the battery module 1 in which the battery cell c has an abnormality is recycled without being reused. Therefore, in the present embodiment, the battery information processing unit 12 outputs abnormality detection data indicating that an abnormality has occurred in the battery cell c. That is, the battery information processing unit 12 functions as an abnormality detection unit that detects an abnormality in the battery cell c. Such abnormality detection data will be stored in the storage unit 13.

In the battery module 1 of the present embodiment, the storage unit 13 stores the SOH for each battery cell c as the degree of deterioration of the battery cell c. These SOH are calculated by the battery information processing unit 12 and input to the storage unit 13. The SOH changes with time. Therefore, the battery information processing unit 12 calculates the SOH at regular time intervals and inputs it to the storage unit 13. When the newly calculated SOH is input from the battery information processing unit 12, the storage unit 13 stores the SOH by accumulating the SOH or updating the previous SOH.

Further, in the present embodiment, the storage unit 13 stores the temperature history information indicating the time-dependent change of the temperature data indicating the time-dependent change of the battery cell c, the voltage history information indicating the time-dependent change of the cell voltage data, and the current. It also stores current history information that indicates changes over time in the data. The temperature data, cell voltage data, and current data of the battery cell c are input to the storage unit 13 at a predetermined sampling timing. The storage unit 13 stores the input temperature data, cell voltage data, and current data, and constantly updates and stores the temperature history information, voltage history information, and current history information.

Further, when the battery information processing unit 12 detects an abnormality in the battery cell c and the battery information processing unit 12 inputs the abnormality detection data, the storage unit 13 stores the abnormality detection data. That is, in the present embodiment, when an abnormality is detected in the battery cell c, data indicating the abnormality is stored in the storage unit 13.

As described above, in the present embodiment, the storage unit 13 stores SOH, temperature history information, voltage history information, voltage history information, current history information, and abnormality detection data as battery information. The battery information stored in such a storage unit 13 can be transmitted to the outside via the transmission unit 14.

The transmission unit 14 transmits the battery information stored in the storage unit 13 to the outside of the battery module 1. Further, the transmission unit 14 transmits voltage data and temperature data input from the voltage measurement unit 10 and the temperature measurement unit 11 to the outside. In the present embodiment, the transmission unit 14 transmits battery information to the outside by wireless communication. Note that the transmission from the transmission unit 14 is not limited to wireless communication, and battery information may be transmitted by wire.

Such a transmission unit 14 is wirelessly connected to the battery management unit 3 in the battery pack P, and outputs necessary battery information based on the instruction of the battery management unit 3. Further, as will be described later, the transmission unit 14 can also be wirelessly connected to the mobile terminal 20 (see FIG. 2). That is, in the present embodiment, the battery information stored in the storage unit 13 can be transmitted to the mobile terminal 20 via the transmission unit.

In the present embodiment, the receiving unit 15 is connected to the battery management unit 3 by wireless communication. Note that the reception of the receiving unit 15 is not limited to wireless communication, and reception may be performed by wire. Such a receiving unit 15 receives the current data input from the battery management unit 3 and sends it to the battery information processing unit 12 and the storage unit 13.

Further, in the present embodiment, the receiving unit 15 receives the equalization instruction signal output from the battery management unit 3 and sends it to the equalizing processing unit 16. Further, as will be described later, the receiving unit 15 can also be wirelessly connected to the mobile terminal 20 (see FIG. 2). In the present embodiment, the receiving unit 15 also sends the equalization instruction signal to the equalization processing unit 16 when it receives the equalization instruction signal from the mobile terminal 20.

The equalization processing unit 16 turns on and controls the switching element of the equalization circuit 1d based on the equalization instruction signal input via the reception unit 15, and discharges the battery cell c connected in parallel to the equalization circuit 1d. Let me. By individually discharging the battery cells c in this way, the voltages of the plurality of battery cells c included in the assembled battery 1a are equalized.

The connection line 2 is a conductive line that connects the assembled battery 1a and the outside of the battery module 1. Two connection lines 2 are provided, one is connected to the positive terminal of the assembled battery 1a arranged on the most positive side, and the other is connected to the negative terminal of the assembled battery 1a arranged on the most negative side. ing.

The battery management unit 3 is connected to all the battery modules 1 and manages and controls the battery modules 1. The battery management unit 3 includes hardware such as a CPU, a memory, an A / D conversion circuit, and an input / output interface, and has a functional unit embodied by these hardware.

In the present embodiment, the battery management unit 3 includes a processing unit 3a, a current measuring unit 3b, a storage unit 3c, a transmitting unit 3d, and a receiving unit 3e. The processing unit 3a performs various processes based on a signal input from a higher-level control system, a signal input via the battery module 1, a signal input from the current measuring unit 3b, and the like.

For example, in the present embodiment, the processing unit 3a determines the necessity of equalization processing based on the signal input via the battery module 1, and equalization processing connected to the battery cell c requiring equalization processing. An instruction signal to the unit 16 is generated. Further, in the present embodiment, the processing unit 3a controls the opening / closing of the contactor 5 based on the ignition on / off signal input from the outside.

The storage unit 3c stores the signal generated by the processing unit 3a and the current data input from the current measuring unit 3b. The current measuring unit 3b receives a signal indicating the current of the battery cell c from the current sensor 4, and outputs the sample value as a measured value (current data) that can be processed by the processing unit 3a. The transmission unit 3d transmits the signal generated by the processing unit 3a and the information stored in the storage unit 3c to the outside of the battery management unit 3. In the present embodiment, the transmission unit 3d is connected to the reception unit 15 of the battery module 1 by wireless communication. In the present embodiment, the receiving unit 3e is connected to the transmitting unit 14 of the battery module 1 by wireless communication.

The current sensor 4 is a sensor provided in the middle of the connection line 2 connected to the negative terminal of the assembled battery 1a arranged on the most negative side, and outputs a signal indicating the current flowing through the connection line 2. The current sensor 4 is connected to the battery management unit 3. The contactor 5 is a switch provided in the middle of each connection line 2 for opening and closing the connection line 2 under the control of the battery management unit 3.

The battery pack P of the present embodiment having such a configuration is mounted on a vehicle and supplies power from the assembled battery 1a or charges the assembled battery 1a under the control of a higher-level control system. After that, the battery pack P is taken out from the vehicle and disassembled at the time of vehicle maintenance or disposal. By disassembling the battery pack P in this way, each battery module 1 is separated from the battery management unit 3. The separated battery module 1 is selected to be reused or recycled.

FIG. 2 is a block diagram schematically showing a schematic configuration of a battery module system S constructed when determining whether to reuse or recycle the battery module 1. As shown in this figure, the battery module system S includes a battery module 1 and a mobile terminal 20 connected to the battery module 1.

The mobile terminal 20 is a mobile tablet terminal or the like used by a worker who determines whether to reuse or recycle the battery module 1, and includes a display unit 21, an operation unit 22, a reception unit 23, and a transmission unit 24. I have. Such a mobile terminal 20 wirelessly transmits a command input by the operation unit 22 to the battery module 1 by the transmission unit 24, and displays the information input from the battery module 1 via the reception unit 23 on the display unit 21. ..

In the present embodiment, the mobile terminal 20 receives the battery information stored in the battery module 1 and displays it on the display unit 21, and also transmits a command for equalization processing to the battery module 1 as needed.

FIG. 3 is a flowchart for explaining the operation of the battery module 1 in the battery module system S. As shown in this figure, the battery module 1 determines whether or not an output command for battery information has been input from the mobile terminal 20 (step S1). When the output command of the battery information is input from the mobile terminal 20, the battery module 1 transmits the battery information stored in the storage unit 13 to the mobile terminal 20 (step S2). By transmitting the battery information to the mobile terminal 20 in this way, the battery information is displayed on the display unit 21, and the operator can determine whether to reuse or recycle the battery module 1 based on the battery information. ..

When step S2 is completed, the battery module 1 determines whether or not a command signal for equalization processing has been input from the mobile terminal 20 (step S3). Further, the battery module 1 proceeds to step S3 when the output command of the battery information is not input from the mobile terminal 20. When the command signal for the equalization process is input from the mobile terminal 20, the battery module 1 executes the equalization process (step S4). Here, the battery module 1 turns on and controls the switching element of the equalization circuit 1d designated by the command signal, and discharges the battery cell c connected in parallel to the equalization circuit 1d (step S4).

When step S4 is completed, or when the command signal for equalization processing is not input from the mobile terminal 20 in step S3, the battery module 1 ends the processing. As described above, according to the battery module 1 of the present embodiment, even after being removed from the battery pack P, the cell voltage can be equalized by operating the mobile terminal 20. can. In FIG. 2, only one battery module 1 is connected to the mobile terminal 20. However, it is also possible to connect a plurality of battery modules 1 to the mobile terminal 20 at the same time and determine whether to reuse or recycle the plurality of battery modules 1 at once.

The battery module 1 of the present embodiment as described above includes a plurality of battery cells c and a voltage measuring unit 10 for measuring the voltage of each battery cell c. Further, the battery module 1 of the present embodiment has a battery information processing unit 12 that calculates the degree of deterioration of each battery cell c based on the measurement result of the voltage measuring unit 10, and a deterioration calculated by the battery information processing unit 12. It includes a storage unit 13 that stores the degree, and a transmission unit 14 that can transmit the deterioration degree stored in the storage unit 13 to the outside.

As described above, in the battery module 1 of the present embodiment, the battery module 1 stores the degree of deterioration of the battery cell c, and the degree of deterioration can be transmitted to the outside. Therefore, in the battery module 1 of the present embodiment, even when the battery pack P is disassembled and the battery module 1 and the battery management unit 3 are separated, the degree of deterioration of the battery cell c is taken out from the battery module 1. It is possible. Therefore, the degree of deterioration of the battery cell c included in the battery module 1 taken out from the battery pack P can be known without using a large charging / discharging device. Therefore, according to the battery module 1 of the present embodiment, it is possible to grasp the degree of deterioration of the battery cell c without charging / discharging the battery module 1 generated after the battery pack P is disassembled.

Further, in the battery module 1 of the present embodiment, the storage unit 13 stores the history information indicating the change with time of the battery cell c in addition to the degree of deterioration, and the transmission unit 14 stores the history information in addition to the degree of deterioration. It is said that it can be sent. Therefore, the operator can determine whether to reuse or recycle the battery module 1 with reference to the history information.

Further, in the battery module 1 of the present embodiment, the history information includes temperature history information indicating a time-dependent temperature change of the battery cell c, voltage history information indicating a time-dependent voltage change of the battery cell c, and battery cell c. Includes current history information indicating changes in current over time. Therefore, the operator can determine whether to reuse or recycle the battery module 1 after confirming the history information that may affect the deterioration of the battery cell c.

Further, in the battery module 1 of the present embodiment, the battery information processing unit 12 may correct the degree of deterioration based on the history information stored in the storage unit 13. By correcting the degree of deterioration in this way, it is possible to grasp the state of the battery cell c more accurately.

Further, the battery module 1 of the present embodiment includes a battery information processing unit 12 for detecting an abnormality in the battery cell c, and the storage unit 13 detects an abnormality detected by the battery information processing unit 12 in addition to the degree of deterioration. The indicated abnormality information is stored, and the transmission unit 14 can transmit the abnormality information in addition to the degree of deterioration. For example, by making it possible to acquire abnormality information from the battery module 1, it is possible to quickly determine the battery module 1 in which the abnormality has occurred.

Further, the battery module system S includes a battery module 1 and a mobile terminal 20 having a receiving unit 23 capable of receiving a signal transmitted from the transmitting unit 14 of the battery module 1, and the mobile terminal 20 is the receiving unit 23. It has a display unit 21 that displays based on the received signal. Therefore, the operator can easily grasp the battery information of the battery module 1 by the mobile terminal 20.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like within a range that does not deviate from the gist of the present invention.

For example, in the above embodiment, a configuration in which SOH is stored in the storage unit 13 as the degree of deterioration has been described. However, the present invention is not limited to this. It is also possible to adopt a configuration in which another index indicating the degree of deterioration of the battery cell c is stored in the storage unit 13 as the degree of deterioration.

Further, in the above embodiment, the configuration in which the history information is stored in the storage unit 13 has been described. However, the present invention is not limited to this, and it is also possible to adopt a configuration in which the degree of deterioration is stored in the storage unit 13 and the history information is not stored.

1 ... Battery module, 1a ... Batteries, 1b ... Temperature sensor, 1c ... Battery monitoring device, 1d ... Equalization circuit, 1e ... Control processing unit, 2 ... Connection line, 3 ... Battery management Unit, 3a ... Processing unit, 3b ... Current measurement unit, 3c ... Storage unit, 3d ... Transmission unit, 3e ... Receiver unit, 4 ... Current sensor, 5 ... Contactor, 10 ... Voltage measurement unit , 11 ... Temperature measurement unit, 12 ... Battery information processing unit (deterioration estimation unit, abnormality detection unit), 13 ... Storage unit, 14 ... Transmission unit, 15 ... Reception unit, 16 ... Equalization processing unit , 20 ... Mobile terminal, 21 ... Display unit, 22 ... Operation unit, 23 ... Receiver unit, 24 ... Transmitter unit, c ... Battery cell, P ... Battery pack, S ... Battery module system

Claims (6)

A battery module including a plurality of battery cells and a voltage measuring unit for measuring the voltage of each of the battery cells.
A deterioration estimation unit that calculates the degree of deterioration of each battery cell based on the measurement results of the voltage measurement unit, and
A storage unit that stores the degree of deterioration calculated by the deterioration estimation unit, and a storage unit that stores the degree of deterioration.
A battery module including a transmission unit capable of transmitting the degree of deterioration stored in the storage unit to the outside. In addition to the degree of deterioration, the storage unit stores historical information indicating changes over time in the battery cell.
The battery module according to claim 1, wherein the transmission unit can transmit the history information in addition to the deterioration degree. The history information includes temperature history information indicating a time-dependent temperature change of the battery cell, voltage history information indicating a time-dependent voltage change of the battery cell, and current history information indicating a time-dependent current change of the battery cell. The battery module according to claim 2, wherein the battery module is at least one of them. The battery module according to claim 2 or 3, wherein the deterioration estimation unit corrects the deterioration degree based on the history information stored in the storage unit. It is provided with an abnormality detection unit that detects an abnormality in the battery cell.
In addition to the degree of deterioration, the storage unit stores abnormality information indicating an abnormality detected by the abnormality detection unit.
The battery module according to any one of claims 1 to 4, wherein the transmitting unit can transmit the abnormal information in addition to the degree of deterioration. The battery module according to any one of claims 1 to 5, and a mobile terminal having a receiving unit capable of receiving a signal transmitted from the transmitting unit of the battery module.
The mobile terminal is a battery module system characterized by having a display unit that displays based on the signal received by the reception unit.

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