JP7414619B2 - Battery module and battery module system - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act 1. Website publication date: January 10, 2020 Website address: Keihin Corporation Press Release https://www. keihin-corp. co. jp/news/20200110-1/ 2. Website publication date: January 16, 2020 Website address: Nikkan Jidosha Shimbun electronic version https://www. netdenjd. com/articles/-/226428 3. Publication date: January 16, 2020 Publication: Nikkan Jidosha Shimbun Published on January 16, 2020 Page 3 4. Website publication date: January 15, 2020 Website address: Response https://response. jp/article/2020/01/15/330696. html5. Website publication date: January 24, 2020 Website address: MONOist https://monoist. atmarkit. co. jp/mn/articles/2001/24/news058. html6. Website publication date: February 3, 2020 Website address: Nikkei Crosstech https://xtech. nikkei. com/atcl/nxt/column/18/00063/00067/ 7. Website publication date: January 10, 2020 Website address: MARKLINES https://www. marklines. com/ja/news/234858 8. Date: January 15th to 17th, 2020 Exhibition name and location: 12th Automotive World Tokyo Big Sight

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

Electric vehicles and the like are equipped with battery packs such as those shown in Patent Document 1, for example. A battery pack includes a battery module in which a plurality of battery cells are connected in series to form a module, and a battery management unit for controlling and managing these battery modules. Generally, a single battery pack includes a plurality of battery modules, and these battery modules are controlled and managed by a single battery management unit.

Japanese Patent Application Publication No. 2014-102248

In recent years, the number of vehicles equipped with battery packs, such as electric vehicles, has increased, and various methods have been proposed for recycling and reusing battery modules included in battery packs. When reusing a battery module, for example, the entire battery module is installed and used in another device. On the other hand, when recycling a battery module, 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. Battery modules whose battery cells have a low degree of deterioration are generally reused, and battery modules including battery cells whose degree of deterioration is large are generally recycled.

However, in the battery pack disclosed in Patent Document 1, all information indicating the state of the battery cells 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 cells cannot be extracted. Therefore, in order to determine the degree of deterioration of the battery cells included in the battery module after disassembly, it is necessary to charge and discharge the battery module using a charging and discharging device. As is well known, a charging/discharging device capable of simultaneously charging and discharging many objects is large in size. Therefore, checking the status of all battery modules in discarded battery packs, which are expected to be generated in large quantities in the future, using a charging/discharging device will hinder efficient reuse of battery modules.

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

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

A first invention is a battery module comprising a plurality of battery cells and a voltage measurement section that measures the voltage of each of the battery cells, the battery module comprising: a plurality of battery cells; and a voltage measurement section that measures the voltage of each of the battery cells; The device includes a deterioration estimating unit that calculates a degree of deterioration, a storage unit that stores the degree of deterioration calculated by the deterioration estimating unit, and a transmitting unit that can transmit the degree of deterioration stored in the storage unit to the outside. Adopt the configuration.

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

A third invention is based on the second invention, wherein the history information includes temperature history information indicating a temperature change over time of the battery cell, voltage history information indicating a voltage change over time of the battery cell; A configuration is adopted in which at least one of current history information indicating a change in current of a battery cell over time is provided.

A fourth invention employs a configuration in the second or third invention, in which the deterioration estimating section corrects the degree of deterioration based on history information stored in the storage section.

A fifth invention, in any one of the first to fourth inventions, includes an abnormality detection section that detects an abnormality in the battery cell, and the storage section detects in addition to the degree of deterioration detected by the abnormality detection section. A configuration is adopted in which abnormality information indicating the abnormality caused by the deterioration is stored, and the transmitter is capable of transmitting the abnormality information in addition to the degree of deterioration.

A sixth invention is a battery module system, comprising the battery module according to any one of the first to fifth inventions, and a receiving section capable of receiving a signal transmitted from the transmitting section of the battery module. A mobile terminal is provided, and the mobile terminal has a display section that performs display based on the signal received by the receiving section.

In the present invention, the battery module stores the degree of deterioration of the battery cells and can transmit this degree of deterioration to the outside. Therefore, in the present invention, even when the battery pack is disassembled and the battery module and battery management unit are separated, it is possible to extract the degree of deterioration of the battery cells from the battery module. Therefore, it is possible to know the degree of deterioration of the battery cells included 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 cells without charging or discharging the battery module that is generated after the battery pack is disassembled.

FIG. 1 is a block diagram schematically showing a schematic configuration of a battery pack including a battery module of the present invention. 1 is a block diagram schematically showing a schematic configuration of a battery module system S including a battery module of the present invention. It is a flow chart for explaining operation of a battery module in battery module system S of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a battery module and a battery module system according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram schematically showing a schematic configuration of a battery pack P including a battery module 1 of this 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 a battery pack 1a including a plurality of battery cells c 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, etc. are integrally packaged in a case (not shown), and is housed in a case (not shown) included in the battery pack P. There is.

As described above, the assembled battery 1a has a plurality of battery cells c connected in series, 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 terminal The negative terminal of the battery cell c placed at the end is the negative terminal of the assembled battery 1a. A positive terminal and a negative terminal of each battery cell c are connected to a battery monitoring device 1c via a transmission line. Temperature sensor 1b is arranged near assembled battery 1a, and outputs a signal indicating the temperature of assembled battery 1a (ie, the temperature of battery cell c).

The battery monitoring device 1c includes an equalization circuit 1d and a control processing section 1e. The equalization circuit 1d is provided for each battery cell c and connects the positive terminal and negative terminal of the battery cell c. Each equalization circuit 1d is connected in parallel to each battery cell c, and is configured as a series circuit of a discharge resistor and a switching element. These equalization circuits 1d are circuits for equalizing the voltages of the battery cells c included in the assembled battery 1a, and switching elements are controlled to be turned on and off under the control of the control processing section 1e. By controlling the switching element to be turned on, the current of the battery cell c is converted into heat by the discharge resistor, and the voltage of 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 functional units realized by these hardware. In this embodiment, the control processing unit 1e includes a voltage measurement unit 10, a temperature measurement unit 11, a battery information processing unit 12 (deterioration estimation unit, abnormality detection unit), a storage unit 13, and a transmission unit 14 as functional units. , a receiving section 15 , and an equalization processing section 16 .

The voltage measuring unit 10 receives a signal indicating the voltage of the battery cell c (cell voltage) inputted from the battery cell c via the transmission line, and converts the sample value into a measured value (cell voltage) that can be processed by the battery information processing unit 12. Output as cell voltage data). This voltage measurement 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 measurement unit 11 receives 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 measurement 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 indicating the ratio of the full charge capacity at the time of deterioration to the initial full charge capacity. For this reason, 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. Find the SOH for each time. In this way, the battery information processing unit 12 calculates the degree of deterioration of each battery cell c based on the measurement results of the voltage measurement unit 10.

Note that the method for 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 battery cell c can be estimated from the cell voltage and the current value of battery cell c, and the SOH can be calculated from the degree of increase in this internal resistance value. For this reason, the battery information processing unit 12 calculates the internal resistance value of each battery cell c from current data (described later) and cell voltage data input from the current sensor 4 via the battery management unit 3, and calculates the internal resistance value of each battery cell c. The SOH may be calculated based on the increase rate of the resistance value from the initial value.

Note that the internal resistance value of battery cell c can be estimated more accurately by further using the temperature of battery cell c. For this reason, the battery information processing unit 12 may further add the temperature data input from the temperature sensor 1b to the cell voltage data and current data to determine the internal resistance value of the battery cell c.

Further, the SOH changes due to the temperature change over time of the battery cell c, the cell voltage change over time, and the current change over time. For this reason, the battery information processing unit 12 stores temperature history information indicating changes in temperature data over time, voltage history information indicating changes in cell voltage data over time, and current history information indicating changes in current data over time. The SOH calculated as described above may be corrected based on the information. Note that, as described later, in the battery module 1 of this 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 using the temperature history information, voltage history information, and 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 an abnormality is detected, an abnormality detection indicating that an abnormality has occurred in the battery cell c. Output data. For example, if any battery cell c is overcharged and a protection circuit (not shown) is activated, the battery module 1 including that battery cell c cannot be used without being disassembled thereafter. Therefore, the battery module 1 in which an abnormality has occurred in the battery cell c will be recycled without being reused. Therefore, in this 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 section 12 functions as an abnormality detection section 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 this embodiment, the storage unit 13 stores the SOH of each battery cell c as the degree of deterioration of the battery cell c. These SOHs are calculated by the battery information processing section 12 and input into the storage section 13. Note that SOH changes over time. Therefore, the battery information processing section 12 calculates the SOH at regular intervals and inputs it into the storage section 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.

In addition, in the present embodiment, the storage unit 13 stores temperature history information indicating a change over time in temperature data indicating a change over time in the battery cell c, voltage history information indicating a change over time in cell voltage data, and current information. Current history information indicating changes in data over time is also stored. Temperature data, cell voltage data, and current data of the battery cell c are input to the storage unit 13 at predetermined sampling timing. The storage unit 13 accumulates 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 abnormality detection data is input from the battery information processing unit 12, the storage unit 13 stores the abnormality detection data. That is, in this 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 the SOH, temperature history information, voltage history information, voltage history information, current history information, and abnormality detection data as battery information. Such battery information stored in the storage section 13 can be transmitted to the outside via the transmitting section 14.

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

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

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

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

The equalization processing section 16 turns on the switching elements of the equalization circuit 1d based on the equalization instruction signal inputted through the reception section 15, and discharges the battery cells c connected in parallel to the equalization circuit 1d. let By discharging the battery cells c individually 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 of which is connected to the positive terminal of the assembled battery 1a placed on the most positive side, and the other connected to the negative terminal of the assembled battery 1a placed 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 functional units realized by these hardware.

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

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

The storage unit 3c stores signals generated by the processing unit 3a and current data input from the current measurement unit 3b. The current measuring section 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 section 3a. The transmitting section 3d transmits the signal generated by the processing section 3a and the information stored in the storage section 3c to the outside of the battery management unit 3. In this embodiment, the transmitter 3d is connected to the receiver 15 of the battery module 1 via wireless communication. In this embodiment, the receiving section 3e is connected to the transmitting section 14 of the battery module 1 via 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. This current sensor 4 is connected to the battery management unit 3. The contactor 5 is a switch that is provided in the middle of each connection line 2 and opens and closes the connection line 2 under the control of the battery management unit 3.

The battery pack P of this embodiment having such a configuration is mounted on a vehicle, and supplies power from or charges the assembled battery 1a under the control of a higher-level control system. Thereafter, the battery pack P is removed from the vehicle and disassembled during vehicle maintenance or disposal. By disassembling the battery pack P in this manner, each battery module 1 is separated from the battery management unit 3. The separated battery module 1 is selected as to whether it should be reused or recycled.

FIG. 2 is a block diagram schematically showing a schematic configuration of a battery module system S that is 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 decides whether to reuse or recycle the battery module 1, and includes a display section 21, an operation section 22, a reception section 23, and a transmission section 24. We are prepared. Such a mobile terminal 20 wirelessly transmits a command input through the operation unit 22 to the battery module 1 via the transmitting unit 24, and displays information input from the battery module 1 via the receiving unit 23 on the display unit 21. .

In this embodiment, the mobile terminal 20 receives the battery information stored in the battery module 1, displays it on the display unit 21, and transmits an equalization processing command to the battery module 1 as necessary.

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 a command to output battery information has been input from the mobile terminal 20 (step S1). When the battery information output command 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 this battery information. .

When Step S2 is completed, the battery module 1 determines whether an equalization processing command signal has been input from the mobile terminal 20 (Step S3). Furthermore, if the battery information output command has not been input from the mobile terminal 20, the battery module 1 moves to step S3. When the command signal for equalization processing is input from the mobile terminal 20, the battery module 1 executes the equalization processing (step S4). Here, the battery module 1 turns on 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 the equalization process is not input from the mobile terminal 20 in step S3, the battery module 1 ends the process. As described above, according to the battery module 1 of the present embodiment, even after being removed from the battery pack P, it is possible to perform the equalization process of equalizing the cell voltages by operating the mobile terminal 20. can. Note that in FIG. 2, only one battery module 1 is connected to the mobile terminal 20. However, it is also possible to simultaneously connect a plurality of battery modules 1 to the mobile terminal 20 and determine whether to reuse or recycle the plurality of battery modules 1 at once.

The battery module 1 of this embodiment as described above includes a plurality of battery cells c and a voltage measuring section 10 that measures the voltage of each battery cell c. The battery module 1 of the present embodiment also includes 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 measurement unit 10, and 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 measurement unit The storage unit 13 includes a storage unit 13 that stores the degree of deterioration, and a transmission unit 14 that can transmit the degree of deterioration stored in the storage unit 13 to the outside.

In this way, in the battery module 1 of this embodiment, the battery module 1 stores the degree of deterioration of the battery cell c, and can transmit this degree of deterioration to the outside. Therefore, in the battery module 1 of this 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 can be taken out from the battery module 1. Is possible. Therefore, it is possible to know the degree of deterioration of the battery cells c included in the battery module 1 taken out from the battery pack P without using a large-sized 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 or discharging the battery module 1 that occurs after the battery pack P is disassembled.

Furthermore, in the battery module 1 of the present embodiment, the storage unit 13 stores history information indicating changes over time in the battery cell c in addition to the degree of deterioration, and the transmission unit 14 stores history information in addition to the degree of deterioration. Sending is possible. Therefore, the operator can refer to the history information to determine whether to reuse or recycle the battery module 1.

In the battery module 1 of the present embodiment, the history information includes temperature history information indicating temperature changes over time of battery cell c, voltage history information indicating voltage changes over time of battery cell c, and Contains current history information that shows current changes over time. Therefore, the operator can determine whether to reuse or recycle the battery module 1 after checking 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 section 12 may correct the degree of deterioration based on the history information stored in the storage section 13. By correcting the degree of deterioration in this manner, it becomes possible to more accurately grasp the state of the battery cell c.

Furthermore, the battery module 1 of the present embodiment includes a battery information processing section 12 that detects an abnormality in the battery cell c, and the storage section 13 stores the abnormality detected by the battery information processing section 12 in addition to the degree of deterioration. The transmitting 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 becomes possible to quickly determine which battery module 1 has experienced an abnormality.

The battery module system S also includes a battery module 1 and a mobile terminal 20 having a receiving section 23 capable of receiving a signal transmitted from the transmitting section 14 of the battery module 1. It has a display section 21 that performs display based on the received signal. Therefore, the operator can easily grasp the battery information of the battery module 1 using the mobile terminal 20.

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

For example, in the above embodiment, a configuration was described in which SOH is stored in the storage unit 13 as the degree of deterioration. However, the present invention is not limited thereto. 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, a configuration in which 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 storage unit 13 stores the degree of deterioration and does not store history information.

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

Claims (4)

A plurality of battery modules are provided in a vehicle, and each battery module includes a plurality of battery cells and a voltage measurement unit that measures 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;
a storage unit that stores the degree of deterioration calculated by the deterioration estimation unit;
a transmitting unit capable of transmitting the degree of deterioration stored in the storage unit to the outside;
and an abnormality detection unit that detects an abnormality in the battery cell,
In addition to the degree of deterioration, the storage unit stores history information indicating changes over time of the battery cell,
The transmitter is capable of transmitting the history information in addition to the degree of deterioration,
The storage unit stores, in addition to the degree of deterioration, abnormality information indicating an abnormality detected by the abnormality detection unit, separately from the history information,
The battery module, wherein the transmitter is capable of transmitting the abnormality information in addition to the degree of deterioration. The history information includes temperature history information indicating temperature changes over time of the battery cells, voltage history information indicating voltage changes over time of the battery cells, and current history information indicating current changes over time of the battery cells. The battery module according to claim 1, characterized in that it is at least one of the following. 3. The battery module according to claim 1, wherein the deterioration estimation section corrects the degree of deterioration based on history information stored in the storage section. The battery module according to any one of claims 1 to 3, and a mobile terminal having a receiving section capable of receiving a signal transmitted from the transmitting section of the battery module,
The battery module system according to claim 1, wherein the mobile terminal includes a display section that displays a display based on the signal received by the reception section.

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