Battery management systems and vehicles

Abstract

To take an action according to a degree of degradation of a battery due to an accident such as collisions.SOLUTION: A battery management system is a system for managing a battery that is mounted on a vehicle capable of traveling with electric power and stores the electric power, comprising: an identification unit for identifying a degree of degradation of a battery 11 before and after an accident of the vehicle (step S112); and a processing unit for executing specific processing related to the battery according to the degree of degradation identified by the identification unit (step S114, step S115, and steps S122 to S124).SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to a battery management system and a vehicle, and more particularly, to a battery management system that manages a battery mounted on a vehicle capable of traveling using electric power and stores the electric power, and a vehicle capable of traveling using electric power.

Background Art

[0002] Conventionally, there has been an electric vehicle in which control is performed to lower the voltage of a traction battery below a specified voltage when the electric vehicle receives an impact such as a collision accident (see, for example, paragraph

[0002] of Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The battery may deteriorate due to external factors such as a collision accident described in Patent Document 1. In this case, it is desirable to take measures according to the deterioration of the battery.

[0005] This disclosure has been made to solve such problems, and an object thereof is to provide a battery management system and a vehicle capable of taking measures according to the deterioration of a battery due to an accident such as a collision.

Means for Solving the Problems

[0006] The battery management system according to this disclosure is a system that manages a battery mounted on a vehicle capable of traveling using electric power and stores the electric power, and includes a specifying unit that specifies the degree of deterioration of the battery before and after an accident of the vehicle, and a processing unit that executes a specifying process related to the battery according to the degree of deterioration specified by the specifying unit.

[0007] With this configuration, the battery management system performs specific processing related to the battery according to the degree of battery degradation before and after a vehicle accident. As a result, it is possible to provide a battery management system that can take measures in accordance with the battery degradation caused by accidents such as collisions.

[0008] The processing unit may, as a specific process, execute a process to ensure the safety of the vehicle when the degree of deterioration exceeds a predetermined value.

[0009] With this configuration, the battery management system executes processes to ensure vehicle safety if the battery degradation level before and after a vehicle accident exceeds a predetermined value. As a result, vehicle safety can be ensured in accordance with the battery degradation caused by accidents such as collisions.

[0010] The processing unit may, as a specific process, execute a process to replace the battery when the degree of degradation is within a predetermined range but below a predetermined value.

[0011] With this configuration, the battery management system executes a process to replace the battery if the degree of battery degradation before and after a vehicle accident falls within a predetermined range below a predetermined value. As a result, the battery can be replaced in accordance with the degradation caused by accidents such as collisions.

[0012] The processing unit may also cancel the execution of a specific process if it detects that the battery is degraded and needs to be replaced.

[0013] With this configuration, the battery management system performs specific processing on the battery in accordance with the rate of increase in the battery's internal resistance or the decrease in its capacity retention rate before and after a vehicle accident. As a result, measures can be taken in accordance with the rate of increase in the battery's internal resistance or the decrease in its capacity retention rate due to an accident such as a collision.

[0014] According to other aspects of this disclosure, the vehicle is powered by electricity and includes a battery for storing electricity, an identification unit for identifying the degree of battery degradation before and after an accident, and a processing unit for performing specific processing on the battery according to the degree of degradation identified by the identification unit.

[0015] This configuration makes it possible to provide a vehicle that can take measures to address battery degradation caused by accidents such as collisions. [Effects of the Invention]

[0016] According to this disclosure, it is possible to provide a battery management system and a vehicle that can take measures in response to battery degradation caused by accidents such as collisions. [Brief explanation of the drawing]

[0017] [Figure 1] This figure shows the configuration of the battery management system according to this embodiment. [Figure 2] This is a block diagram illustrating the schematic configuration of each device included in this embodiment of the battery management system. [Figure 3] This is a flowchart showing the flow of the battery degradation response process in the first embodiment. [Figure 4] This flowchart shows the flow of the battery degradation response process in the second embodiment. [Modes for carrying out the invention]

[0018] The embodiments of this disclosure will be described in detail below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated.

[0019] [First Embodiment] FIG. 1 is a diagram showing the configuration of the battery management system 1 according to this embodiment. FIG. 2 is a block diagram showing an outline of the configuration of each device included in the battery management system 1 of this embodiment. Referring to FIGS. 1 and 2, the battery management system 1 includes a plurality of vehicles 10A and 10B (hereinafter also typically referred to as "vehicle 10"), a plurality of replacement stations 20A to 20C, and facility servers 200A to 200C (hereinafter also typically referred to as "facility server 200") provided in each of the replacement stations 20A to 20C, and a management server 100. Further, the battery management system 1 may include a mobile terminal 800 owned by the user of the vehicle 10. The vehicles 10A and 10B, the facility servers 200A to 200C, the management server 100, and the mobile terminal 800 can communicate via a communication network 900.

[0020] The vehicle 10 includes a battery 11, an ECU (Electronic Control Unit) 12, a drive unit 13, a DCM (Data Communication Module) 14, an HMI (Human Machine Interface) 15, and a shock detection sensor 17. The battery 11 stores electric power used for the running of the vehicle 10 and is mounted on the vehicle 10 in a replaceable state by a replacement device 21 described later. The battery 11 is, for example, composed of a lithium-ion battery. However, it is not limited thereto, and the battery 11 may be composed of other types of batteries, for example, a nickel-hydrogen battery or a all-solid-state battery.

[0021] The ECU 12 includes a CPU (Central Processing Unit), a memory, and a GPS (Global Positioning System). The memory includes a RAM (Random Access Memory) and a ROM (Read Only Memory), and stores programs and data used by the CPU. The CPU executes predetermined processing defined by the program according to the programs and data stored in the memory and the data input from the outside, and stores the data of the execution result in the memory or outputs it to the outside. The GPS detects the position information of the vehicle 10 and delivers it to the CPU.

[0022] The drive unit 13 includes a motor generator and an inverter that drives the motor generator using the power of the battery 11 and charges the battery 11 with the regenerative power generated by the motor generator. The drive unit 13 may further include an engine that operates with fuel to drive the motor generator or the vehicle 10. That is, the vehicle 10 may be a battery electric vehicle (BEV: Battery Electric Vehicle) that includes a motor generator but does not include an engine, or a hybrid electric vehicle (HEV: Hybrid Electric Vehicle) or a plug-in hybrid electric vehicle (PHEV: Plug-in Hybrid Electric Vehicle) that includes a motor generator and an engine. Also, the vehicle 10 may be a fuel cell electric vehicle (FCEV: Fuel Cell Electric Vehicle).

[0023] The DCM 14 is a module for communicating with an external device via a communication network 900, transmits data from the ECU 12 to the external device, and delivers data from the external device to the ECU 12.

[0024] The HMI 15 is a device installed near the driver's seat of the vehicle 10 that receives information input from the user and outputs it to the ECU 12, and notifies the user of the information from the ECU 12 by display or voice, and is configured to include, for example, a touch panel display.

[0025] The impact detection sensor 17 includes an acceleration sensor and outputs signals to the ECU 12 indicating the acceleration in the three axes that occurred in the vehicle 10. The ECU 12 identifies the acceleration in the three axes from the signals input from the impact detection sensor 17, identifies the impact force on the vehicle 10 from the change in acceleration, and determines whether or not an external force such as a collision or impact from a flying object has acted on the vehicle 10 based on the magnitude of the impact force.

[0026] The equipment server 200 comprises a CPU 210, memory 220, a communication unit 230, and a mass storage device 240. The memory 220 includes RAM (Random Access Memory) and ROM (Read Only Memory). The communication unit 230 can communicate with external devices via a communication network 900, sending data from the CPU 210 to external devices and receiving data from external devices to the CPU 210. The mass storage device 240 is composed of an HDD (Hard Disk Drive) or SSD (Solid State Drive), and stores programs and data used by the CPU 210. The CPU 210 executes predetermined processing defined by the program according to the programs and data stored in the memory 220 or mass storage device 240, as well as data input from external devices to the communication unit 230, and stores the execution result data in the memory 220 or mass storage device 240 or outputs it to external devices from the communication unit 230.

[0027] The battery 11 exchange station 20 comprises an exchange device 21 and an equipment server 200. The exchange device 21 is controlled by the equipment server 200 to remove the battery 11 from the vehicle 10, move the removed battery 11 to a storage location, start charging the moved battery 11, retrieve the charged battery 11 from the storage location, and install the retrieved battery 11 back into the vehicle 10. In this embodiment, after a battery 11 exchange reservation is made, the battery 11, which is charged to an SOC (State of Charge) of 80%, is charged to a full charge of SOC = 100%.

[0028] The management server 100 comprises a CPU 110, memory 120, communication unit 130, and mass storage device 140. The management server 100 manages the status of the batteries 11 of the vehicle 10. For example, the management server 100 assigns an identification number to each of the multiple batteries 11 and manages the location of each battery 11 (which vehicle 10 it is installed in, which exchange station 20 it is stored in), and the status of the insurance on the battery 11, associating each battery 11 with its identification number. The functions of the CPU 110, memory 120, communication unit 130, and mass storage device 140 of the management server 100 are the same as those of the CPU 210, memory 220, communication unit 230, and mass storage device 240 of the equipment server 200 described above.

[0029] The mobile terminal 800 comprises a CPU 810, a memory 820, a communication unit 830, an input unit 840, and an output unit 850. The functions of the memory 820 and the communication unit 830 of the mobile terminal 800 are the same as those of the memory 220 and the communication unit 230 of the aforementioned equipment server 200, respectively. The input unit 840 consists of a touch panel, operation buttons, and a microphone, and receives data input from the touch panel, operation buttons, or microphone and transmits it to the CPU 810. The output unit 850 consists of a display and a speaker, and outputs data from the CPU 810 through the display or speaker. The CPU 810 executes predetermined processing defined by the program according to the program and data stored in the memory 820, data input from an external device to the communication unit 830, and data input from the input unit 840, and stores the execution result data in the memory 820, outputs it from the communication unit 830 to an external device, or outputs it from the output unit 850.

[0030] In the battery management system 1 described above, the battery may deteriorate due to external factors such as collisions. In this case, it is desirable to take measures appropriate to the degree of battery deterioration.

[0031] Therefore, the battery management system 1 identifies the degree of degradation of the battery 11 of the vehicle 10 before and after the accident, and performs specific processing on the battery 11 according to the identified degree of degradation.

[0032] As a result, the battery management system 1 performs specific processing on the battery 11 according to the degree of degradation of the battery 11 before and after the accident of the vehicle 10. Consequently, measures can be taken in accordance with the degradation of the battery 11 due to accidents such as collisions.

[0033] Figure 3 is a flowchart showing the flow of the battery degradation response process in the first embodiment. Referring to Figure 3, this battery degradation response process is called and executed by the ECU 12 of the vehicle 10 from a higher-level process at regular intervals (for example, a regular interval between a few ms and tens of ms).

[0034] The ECU 12 of vehicle 10 determines from the signal from the impact detection sensor 17 whether or not it has detected an external force on vehicle 10, such as a collision, personal injury, property damage, self-inflicted accident, wheel detachment, rollover, or impact by flying object (step S111). If it determines that no external force such as a collision has been detected (NO in step S111), the ECU 12 returns the processing to the higher-level processing that called this battery degradation response processing.

[0035] On the other hand, if the ECU 12 determines that an external force such as a collision has been detected (YES in step S111), it identifies the rate of increase in the internal resistance of the battery 11 before and after the detection of the external force such as a collision (step S112). The ECU 12 periodically identifies the internal resistance of the battery 11 and stores it in memory. When an external force is detected, it identifies the internal resistance and calculates the rate of increase in internal resistance by subtracting the internal resistance before the detection of the external force, which is stored in memory, from the identified internal resistance.

[0036] The ECU 12 determines whether the rate of increase calculated in step S112 is greater than or equal to a predetermined value (step S113). The predetermined value is a threshold for the rate of increase of internal resistance used to determine whether or not rapid deterioration has occurred in the battery 11. If the rate of increase of internal resistance is greater than or equal to this predetermined value, it is determined that rapid deterioration has occurred in the battery 11. If it is less than this predetermined value, it is determined that rapid deterioration has not occurred in the battery 11.

[0037] If the ECU 12 determines that the rate of increase in internal resistance is above a predetermined value (YES in step S113), it controls the drive unit 13 to restrict driving (step S114). In this embodiment, the driving restriction is such that the speed does not exceed a predetermined upper limit (for example, a relatively low slow speed such as 30 km / h). However, it is not limited to this, and the driving restriction may be such that the driving distance does not exceed a predetermined upper limit, or the driving time after an external force such as a collision is detected does not exceed a predetermined upper limit, or it may be a restriction on turning the vehicle 10 to the ON state when the power switch is turned ON after being turned OFF. The ECU 12 also releases the driving restriction when it detects that the deteriorated battery 11 has been replaced. Along with the control in step S114, the ECU 12 may also notify the HMI 15 by voice or display that the driving restriction will be released when the battery 11 is replaced.

[0038] Then, the ECU 12 starts guiding the vehicle 10 to a safe place to stop (step S115), and returns the processing to the higher-level processing that called this battery degradation response processing. A safe place is the shoulder of the road, or, if the shoulder is narrow, as wide a place as possible. In this embodiment, this guidance is provided by guiding the vehicle to a safe place on the navigation screen displayed on the HMI 15, but is not limited to this. For example, it may be guidance by voice or display on the HMI 15 such as "Please pull over to the shoulder of the road," or "There is a parking lot 100m ahead where you can park," or if the vehicle 10 is capable of autonomous driving, it may be autonomous driving to a safe place.

[0039] On the other hand, if it is determined that the rate of increase in internal resistance is less than a predetermined value (NO in step S113), the ECU 12 determines whether the rate of increase is greater than or equal to a predetermined minute value (i.e., within a predetermined range where the rate of increase is less than the predetermined value and greater than or equal to the predetermined minute value) (step S121). If it is determined that the rate of increase is less than the predetermined minute value (NO in step S121), the ECU 12 returns the process to be executed to the higher-level process that called this battery degradation response process.

[0040] On the other hand, if the rate of increase is greater than or equal to a predetermined minute value (YES in step S121), that is, if the rate of increase is determined to be within a predetermined range, the ECU 12 searches for a nearby replacement station 20 to the current location of the vehicle 10 (step S122) and executes a process to reserve the replacement of the battery 11 at the found replacement station 20 (step S123). Then, the ECU 12 starts guiding the vehicle to the found replacement station 20 (step S124) and returns the process to be executed to the higher-level process that called this battery degradation response process. In this embodiment, this guidance is provided by guiding the vehicle to the found replacement station 20 as the destination on the navigation screen displayed on the HMI 15, but is not limited to this, and if the vehicle 10 is capable of autonomous driving, it may be autonomous driving to the found replacement station 20.

[0041] [Second Embodiment] In the first embodiment, when an external force such as a collision is detected, the vehicle 10 performs specific processing related to the battery 11 according to the degree of deterioration of the battery 11 before and after the accident. In the second embodiment, the specific processing is performed by the vehicle 10 and the battery management system 1, which includes the management server 100.

[0042] Figure 4 is a flowchart showing the flow of battery degradation response processing in the second embodiment. Referring to Figure 4, of the battery degradation response processing, the vehicle-side battery degradation response processing is called and executed by the ECU 12 of the vehicle 10 from higher-level processing at regular intervals (for example, regular intervals between a few ms and tens of ms). Of the battery degradation response processing, the server-side battery degradation response processing is called and executed by the CPU 110 of the management server 100 from higher-level processing at predetermined intervals.

[0043] The ECU 12 of vehicle 10 determines from the signal from the impact detection sensor 17 whether or not it has detected an external force on vehicle 10, such as a collision, personal injury, property damage, self-inflicted accident, wheel detachment, rollover, or impact by flying object (step S131). If it determines that no external force such as a collision has been detected (NO in step S131), the ECU 12 proceeds to step S133.

[0044] On the other hand, if it is determined that an external force such as a collision has been detected (YES in step S131), the ECU 12, similar to step S112 in Figure 3, identifies the rate of increase in the internal resistance of the battery 11 before and after the detection of the external force such as a collision (step S132A), controls the DCM 14 to send the rate of increase to the management server 100 (step S132B), and proceeds to step S133 to execute the process.

[0045] In the management server 100, the CPU 110 determines whether or not it has received the rate of increase of the internal resistance of the battery 11 from the vehicle 10 (step S211). If it determines that the rate of increase has not been received (NO in step S211), the CPU 110 returns the processing to the higher-level processing that called this battery degradation response server-side processing.

[0046] On the other hand, if the CPU 110 determines that it has received an increase rate (YES in step S211), it determines whether the received increase rate is greater than or equal to a predetermined value, similar to step S113 in Figure 3 (step S212).

[0047] If the CPU 110 determines that the rate of increase in internal resistance is above a predetermined value (YES in step S212), the CPU 110 controls the communication unit 130 to send driving restriction information to the vehicle 10 to guide it to a safe place to stop while restricting its movement (step S213), and returns the processing to be executed to the higher-level processing that called this battery degradation response server-side processing.

[0048] In vehicle 10, the ECU 12 determines whether or not it has received driving restriction information from the management server 100 (step S133). If it determines that it has not received the information (NO in step S133), the ECU 12 proceeds to step S141.

[0049] On the other hand, if it determines that it has received driving restriction information (YES in step S133), the ECU 12 controls the drive unit 13 to restrict driving, similar to step S114 in Figure 3 (step S134). The ECU 12 also releases the driving restriction when it detects that the deteriorated battery 11 has been replaced. In this case, if the management server 100 detects that the battery 11 of the vehicle 10 has been replaced, it may send information to the vehicle 10 to release the driving restriction, and the vehicle 10 may release the driving restriction upon receiving this information.

[0050] Then, ECU 12, similar to step S115 in Figure 3, starts guiding the vehicle 10 to a safe location (step S135), and proceeds to step S141 to execute the process.

[0051] If the management server 100 determines that the rate of increase in internal resistance is less than a predetermined value (NO in step S212), the CPU 110 determines whether the rate of increase is greater than or equal to a predetermined minute value (i.e., within a predetermined range where the rate of increase is less than the predetermined value and greater than or equal to the predetermined minute value) (step S221). If the CPU 110 determines that the rate of increase is less than the predetermined minute value (NO in step S221), the CPU 110 returns the processing to be executed to the higher-level processing that called this battery degradation response server-side processing.

[0052] On the other hand, if the rate of increase is greater than or equal to a predetermined small value (YES in step S221), that is, if the CPU 110 determines that the rate of increase is within a predetermined range, the CPU 110 searches for a nearby replacement station 20 at the current location of the vehicle 10 (step S222), and executes a process to reserve the replacement of the battery 11 at the found replacement station 20 (step S223). Then, the CPU 110 controls the communication unit 130 to send guidance information to the vehicle 10 to guide the vehicle 10 to the found replacement station 20 (step S224), and returns the process to be executed to the higher-level process that called this battery degradation response server-side process.

[0053] In vehicle 10, the ECU 12 determines whether or not it has received guidance information from the management server 100 (step S141). If it determines that it has not received the information (NO in step S141), the ECU 12 returns the processing to be executed to the higher-level processing that called this battery degradation response vehicle-side processing.

[0054] On the other hand, if the ECU 12 determines that guidance information has been received (YES in step S141), it starts guiding the vehicle to the exchange station 20 indicated by the guidance information (step S144), similar to step S124 in Figure 3, and returns the processing to be executed to the higher-level processing that called this battery degradation response vehicle-side processing.

[0055] [Differentiation] (1) In the above-described embodiment, as shown in step S111 in Figure 3 and step S131 in Figure 4, it is determined whether or not an external force such as a collision with the vehicle 10 has been detected, and if an external force is detected, the processes from step S112 and step S132A onwards are executed, respectively. However, the embodiment is not limited to this, and it is also possible to determine whether or not other external factors that affect the deterioration of the battery 11, such as a fire or submersion of the vehicle, have been detected, and if these other external factors are detected, the processes from step S112 and step S132A onwards are executed.

[0056] (2) In the embodiments described above, the degree of degradation of the battery 11 was determined by the rate of increase in internal resistance, as shown in step S112 of Figure 3 and step S132A of Figure 4. However, the invention is not limited to this, and the degree of degradation of the battery 11 may be determined by other methods. For example, the degradation of the battery 11 may be determined by the decrease in the capacity retention rate, or by the presence or absence of external damage (e.g., damage to the busbar, leakage). The capacity retention rate is the ratio of the current capacity to the capacity of the battery 11 in its initial state (undegraded state), expressed, for example, as 0 to 100%. The capacity of the battery 11 corresponds to the amount of stored energy in a fully charged state.

[0057] (3) The embodiments described above can be interpreted as disclosures of the battery management system 1, the vehicle 10, or the management server 100, or as disclosures of methods or programs for managing the battery 11 that are executed by the battery management system 1, the vehicle 10, or the management server 100.

[0058] [summary] (1) As shown in Figures 1 to 4, the battery management system 1 is a system that manages a battery 11 installed in a vehicle 10 that is capable of running using electricity and stores electricity, and includes an identification unit that identifies the degree of deterioration of the battery 11 before and after an accident of the vehicle 10 (for example, an impact detection sensor 17 of the vehicle 10 that identifies the degree of deterioration by detecting it, an ECU 12 of the vehicle 10 that identifies the degree of deterioration by obtaining it from the impact detection sensor 17, and a communication unit 130 and CPU 110 of the management server 100 that identify the degree of deterioration by obtaining it from the vehicle 10, The system includes steps S112 in Figure 3, and steps S132A, S132B, and S211 in Figure 4, as well as a processing unit that performs specific processing on the battery 11 according to the degree of degradation identified by the specific unit (for example, the ECU 12 of the vehicle 10, the CPU 110 of the management server 100, steps S114, S115, S122 to S124 in Figure 3, and steps S213, S134, S135, S222 to S224, and S144 in Figure 4).

[0059] As a result, the battery management system 1 performs specific processing on the battery 11 according to the degree of degradation of the battery 11 before and after the accident of the vehicle 10. Consequently, measures can be taken in accordance with the degradation of the battery due to accidents such as collisions.

[0060] (2) As shown in Figures 3 and 4, the processing unit may perform a specific process to ensure the safety of the vehicle when the degree of deterioration is greater than or equal to a predetermined value (for example, steps S114 and S115 in Figure 3, and steps S134 and S135 in Figure 4).

[0061] As a result, the battery management system 1 executes a process to ensure the safety of vehicle 10 if the degree of degradation of the battery 11 before and after an accident in vehicle 10 exceeds a predetermined value. Consequently, the safety of vehicle 10 can be ensured in accordance with the degradation of the battery 11 due to accidents such as collisions.

[0062] (3) As shown in Figures 3 and 4, the processing unit may, as a specific process, perform a process to replace the battery 11 when the degree of degradation is within a predetermined range but below a predetermined value (for example, steps S122 to S124 in Figure 3, and steps S222 to S224 and S144 in Figure 4).

[0063] As a result, the battery management system 1 executes a process to replace the battery 11 if the degree of degradation of the battery 11 before and after the accident in the vehicle 10 is within a predetermined range but below a predetermined value. Consequently, the battery 11 can be replaced in accordance with the degradation of the battery 11 due to an accident such as a collision.

[0064] (4) As shown in Figures 3 and 4, the processing unit may cancel the execution of a specific process when it detects that the battery is degraded and needs to be replaced (for example, step S114 in Figure 3, step S134 in Figure 4).

[0065] As a result, the battery management system 1 performs specific processing on the battery 11 in accordance with the rate of increase in the internal resistance of the battery 11 or the decrease in its capacity retention rate before and after an accident involving the vehicle 10. Consequently, measures can be taken in accordance with the rate of increase in the internal resistance of the battery 11 or the decrease in its capacity retention rate due to an accident such as a collision.

[0066] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this disclosure is indicated by the claims rather than by the description of the embodiments above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0067] 1 Battery management system, 10, 10A, 10B Vehicle, 11 Battery, 12 ECU, 13 Drive unit, 14 DCM, 15 HMI, 17 Impact detection sensor, 20, 20A~20C Exchange station, 21 Exchange device, 100 Management server, 110, 210, 810 CPU, 120, 220, 820 Memory, 130, 230, 830 Communication unit, 140, 240 Mass storage device, 200, 200A~200C Equipment server, 800 Mobile terminal, 840 Input unit, 850 Output unit, 900 Communication network.

Claims

1. A battery management system for managing a battery that stores the power of a vehicle that is mounted on a vehicle capable of running using electricity, Processor and The system includes a memory that periodically stores the internal resistance of the battery, The aforementioned processor, The external force caused by the accident of the aforementioned vehicle is detected, The rate of increase in the internal resistance is calculated by subtracting the internal resistance stored in the memory before the detection of the external force from the internal resistance stored in the memory after the detection of the external force. A battery management system that, if the identified rate of increase is greater than or equal to a predetermined value, controls the drive unit to restrict the movement of the vehicle and initiates guidance to stop the vehicle in a safe place, while if the rate of increase is within a predetermined range less than the predetermined value, searches for a battery replacement station near the vehicle's current location and reserves a battery replacement at the found replacement station.

2. A vehicle that can run using electricity, A battery for storing the aforementioned power, Processor and The system includes a memory that periodically stores the internal resistance of the battery, The aforementioned processor, The external force caused by the accident of the aforementioned vehicle is detected, The rate of increase in the internal resistance is calculated by subtracting the internal resistance stored in the memory before the detection of the external force from the internal resistance stored in the memory after the detection of the external force. A vehicle that, if the identified rate of increase is greater than or equal to a predetermined value, controls the drive unit to restrict the vehicle's movement and initiates guidance to stop the vehicle in a safe place; on the other hand, if the rate of increase is within a predetermined range less than the predetermined value, searches for a battery replacement station near the vehicle's current location and reserves a battery replacement at one of the found replacement stations.

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