In-vehicle battery management device

Abstract

The present disclosure provides an in-vehicle battery management device. The in-vehicle battery management device disclosed herein includes a control device that controls a charging / discharging device connected to an in-vehicle battery of an electric vehicle so as to charge and discharge the in-vehicle battery under predetermined processing conditions. The control device includes: a calculation unit that calculates a degree of deterioration progress of the in-vehicle battery based on charging / discharging information during charging and discharging; and a communication unit that notifies the calculated degree of deterioration progress to a predetermined notification destination.

Description

Technical Field

[0001] The present invention relates to an in-vehicle battery management device. Background Art

[0002] In Japanese Patent Application Laid-Open No. 2019-080403, a charge / discharge management system for an in-vehicle battery is disclosed, which includes: an in-vehicle battery mounted on a vehicle; and a charge / discharge device that charges and discharges the in-vehicle battery. The charge / discharge device can select the discharge of power from the in-vehicle battery to the system power grid and the supply of power from the system power grid to the in-vehicle battery. The charge / discharge management system disclosed in this publication includes a battery deterioration notification unit that notifies the user or the owner of the vehicle of the degree of deterioration progress of the in-vehicle battery associated with the charge / discharge operation with the system power grid. By being notified of the degree of deterioration progress of the in-vehicle battery, the user or the owner of the vehicle can compare the charge / discharge consideration obtained by using the in-vehicle battery to adjust the supply-demand balance and the decrease in the asset value of the vehicle caused by the deterioration of the battery. Thus, it becomes easy to determine whether to permit the use of the in-vehicle battery to adjust the supply-demand balance.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2019-080403 Summary of the Invention

[0006] However, within the knowledge framework of the present inventors, depending on the difference in the calculation method, the value of the degree of deterioration of the in-vehicle battery is sometimes different. The present inventors consider providing a method for calculating the degree of deterioration of the in-vehicle battery with higher accuracy.

[0007] The in-vehicle battery management device disclosed herein includes a control device that controls a charge / discharge device connected to an in-vehicle battery of an electric vehicle so as to charge and discharge the in-vehicle battery under predetermined processing conditions. The control device includes: a calculation unit that calculates the degree of deterioration progress of the in-vehicle battery based on charge / discharge information during charge / discharge; and a communication unit that notifies the calculated degree of deterioration progress to a predetermined notification destination. With the in-vehicle battery management device having the above structure, users of electric vehicles and the like can utilize the degree of deterioration of the in-vehicle battery calculated with higher accuracy.

[0008] The degree of deterioration progress of the in-vehicle battery can also be set in the electric vehicle. The control device may further include a second communication unit configured to perform the following processing: prompting to correct the degree of deterioration set in the in-vehicle battery based on the degree of deterioration progress calculated from the charge / discharge information; and receiving the result of whether the degree of deterioration has been corrected.

[0009] The degree of deterioration progress may also be calculated in an electric vehicle. The control device may further include: an acquisition unit that acquires the degree of deterioration progress calculated on the electric vehicle side; and a first determination unit that determines whether at least any one of the degree of deterioration progress acquired from the electric vehicle and the degree of deterioration progress calculated based on charge / discharge information is equal to or less than a predetermined value. When at least any one of the degree of deterioration progress acquired from the electric vehicle and the degree of deterioration progress calculated based on charge / discharge information is equal to or less than a predetermined value, the communication unit may notify the degree of deterioration progress to a predetermined notification destination.

[0010] The degree of deterioration progress may also be calculated in an electric vehicle. The control device may further include: an acquisition unit that acquires the degree of deterioration progress calculated on the electric vehicle side; and a second determination unit that determines whether the degree of deterioration progress acquired from the electric vehicle and the degree of deterioration progress calculated based on charge / discharge information differ by a value equal to or greater than a predetermined value. When the degree of deterioration progress acquired from the electric vehicle and the degree of deterioration progress calculated based on charge / discharge information differ by a value equal to or greater than a predetermined value, the communication unit may notify the degree of deterioration progress to a predetermined notification destination.

[0011] The control device may further include: a storage unit that stores the degree of deterioration progress calculated based on charge / discharge information; and an estimation unit that estimates the life of the in-vehicle battery based on the stored degree of deterioration progress.

[0012] The control device may further include a setting unit that sets the charge / discharge conditions of the in-vehicle battery based on the degree of deterioration progress calculated based on charge / discharge information. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a block diagram showing the in-vehicle battery management system 100.

[0014] Figure 2 is a flowchart showing the process of the processing implemented by the in-vehicle battery management device 40.

[0015] Figure 3 is a flowchart showing the process of the processing for correcting the degree of deterioration progress set in the in-vehicle battery 11.

[0016] Figure 4 is a flowchart showing the process of the processing for notifying the progress of the deterioration of the in-vehicle battery 11.

[0017] Figure 5 is a flowchart showing the process of the processing for notifying when the degree of deterioration progress A and the degree of deterioration progress B deviate.

[0018] Figure 6 is a flowchart showing the process of the processing for estimating the life of the in-vehicle battery 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Hereinafter, with reference to the accompanying drawings, an embodiment of the in-vehicle battery management device disclosed herein will be described. The embodiment described herein is not particularly intended to limit the present invention. The present invention is not limited to the embodiment described herein unless otherwise specified. In addition, the same reference numerals are appropriately added to components / parts that perform the same function, and repeated descriptions are appropriately omitted.

[0020] <In-vehicle battery management system 100>

[0021] Figure 1 is a block diagram showing the in-vehicle battery management system 100. As Figure 1 shown, the in-vehicle battery management system 100 includes: a charging / discharging device 30 that connects the electric vehicle 10 to the power system 70 and performs charging and discharging (hereinafter also referred to as charging / discharging) on the in-vehicle battery 11 mounted on the electric vehicle 10; and an in-vehicle battery management device 40 that controls the charging / discharging device 30 and manages the in-vehicle battery 11. The in-vehicle battery management system 100 may also include a power storage device (not shown) that stores power. The in-vehicle battery management system 100 is managed by a system administrator.

[0022] <Electric vehicle 10>

[0023] The electric vehicle 10 is a vehicle equipped with a rechargeable in-vehicle battery 11. The electric vehicle 10 travels using the power obtained from the in-vehicle battery 11 as an energy source. The electric vehicle 10 includes vehicles that use electricity as an energy source, such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles. The electric vehicle 10 can be either a four-wheeled vehicle or a two-wheeled vehicle. The user of the electric vehicle 10 uses a user terminal 15. The user terminal 15 can be, for example, a vehicle navigation system mounted on the electric vehicle 10, or a smartphone, tablet terminal, desktop computer type, or laptop personal computer used by the user. The user terminal 15 includes, for example, an input unit for inputting by user operations such as a touch panel, keyboard, or mouse, and a screen. The user terminal 15 includes a terminal control device 16. The user terminal 15 is configured to be able to communicate with the electric vehicle 10 or the in-vehicle battery management device 40 via the terminal control device 16. The user can confirm information related to the electric vehicle 10 or the in-vehicle battery 11 via the user terminal 15.

[0024] The electric vehicle 10 is equipped with a vehicle control device 20. The vehicle control device 20 is communicably connected to the in-vehicle battery 11. The vehicle control device 20 includes a storage unit 21, a first communication unit 22, a second communication unit 23, a calculation unit 24, and a setting unit 25. Each part 21-25 of the vehicle control device 20 can be implemented by one or more processors or embedded in a circuit. The vehicle control device 20 is configured to communicate with the in-vehicle battery management device 40 via the first communication unit 22. The vehicle control device 20 is configured to communicate with the user terminal 15 via the second communication unit 23. The storage unit 21 stores a degradation progress database DB1. In the degradation progress database DB1, the degradation progress calculated by the calculation unit 24 of the vehicle control device 20 is stored.

[0025] However, the in-vehicle battery 11 may deteriorate and develop along with the use or charge / discharge of the electric vehicle 10. In the electric vehicle 10, the degradation progress of the in-vehicle battery 11 is set. In the electric vehicle 10, it is configured to calculate the degradation progress of the in-vehicle battery 11. The calculation unit 24 of the vehicle control device 20 calculates the degradation progress of the in-vehicle battery 11. In this embodiment, the degradation progress of the in-vehicle battery 11 is expressed as SOH (State of Health). For example, the degradation progress of the in-vehicle battery 11 is expressed as the full charge capacity when calculating the degradation progress relative to the full charge capacity of the in-vehicle battery 11 at the initial stage of use of the electric vehicle 10. The full charge capacity of the in-vehicle battery 11 at the initial stage of use of the electric vehicle 10 is registered in the calculation unit 24, for example. In this embodiment, the calculation unit 24 calculates the degradation progress when the electric vehicle 10 is running or when the electric vehicle 10 is charging / discharging. For example, the charge / discharge capacity when the in-vehicle battery 11 is charged / discharged within a specific SOC (State Of Charge) range is measured. Next, based on the charge / discharge capacity measured within the charge / discharge SOC range, the full charge capacity (i.e., the battery capacity in the state where the SOC is 100%) is calculated. Then, the full charge capacity calculated here is obtained relative to the full charge capacity of the in-vehicle battery 11 at the initial stage of use of the electric vehicle 10, and the degradation progress is calculated.

[0026] The setting unit 25 sets the degradation progress calculated by the calculation unit 24 as the degradation progress of the in-vehicle battery 11. In addition, the setting unit 25 can correct the degradation progress of the in-vehicle battery 11 according to the degradation progress calculated by the in-vehicle battery management device 40 described later. For example, when determining the charge / discharge range during the use of the electric vehicle 10 or when the in-vehicle battery 11 is charged / discharged, or when judging the replacement period of the in-vehicle battery 11, etc., the degradation progress set by the setting unit 25 is used.

[0027] <Charge / Discharge Device 30>

[0028] The charging and discharging device 30 is a device for charging and discharging the in-vehicle battery 11 of the electric vehicle 10. The charging and discharging device 30 includes a connector 31 and a control device 32. The control device 32 includes a communication unit 33, a setting unit 34, an execution unit 35, and an acquisition unit 36. The control device 32 can be, for example, a microcomputer. Each of the units 33 to 36 of the control device 32 can be implemented by one or more processors or embedded in a circuit. The control device 32 of the charging and discharging device 30 is configured to be able to communicate with the in-vehicle battery management device 40 via the communication unit 33.

[0029] The connector 31 of the charging and discharging device 30 is connected to the electric vehicle 10. The in-vehicle battery 11 performs charging and discharging via the connector 31. Although not particularly limited, as the connector 31, for example, a charging and discharging cable or the like can be used. The charging and discharging device 30 is configured to be able to supply power to the in-vehicle battery 11 from the power storage device via the connector 31. The charging and discharging device 30 is configured to be able to supply power from the in-vehicle battery 11 to the power storage device via the connector 31. The electric vehicle 10 is connected to the power system 70 via the charging and discharging device 30.

[0030] The power system 70 is a system composed of electrical equipment for power generation, power transmission, power transformation, power distribution, etc. The power system 70 supplies power to the electrical equipment on the demand side according to the power demand. The amount of power is adjusted in a way that maintains the balance between demand and supply. Such adjustment of power supply and demand can be managed by a manager also called an integrator. The integrator can also be the system manager of the in-vehicle battery management system 100.

[0031] <In-vehicle battery management device 40>

[0032] The in-vehicle battery management device 40 manages information such as the charging and discharging of the in-vehicle battery 11 of the electric vehicle 10, the usage status, or the deterioration state of the in-vehicle battery 11. In this embodiment, the in-vehicle battery management device 40 manages the deterioration state of the in-vehicle battery 11 as the degree of deterioration development. The in-vehicle battery management device 40 can be implemented by a single computer or can be implemented by multiple computers cooperating with each other. The in-vehicle battery management device 40 can be managed by the system manager of the in-vehicle battery management system 100.

[0033] The in-vehicle battery management device 40 includes a control device 50. The control device 50 can be, for example, a microcomputer. The control device 50 includes a storage unit 51, a first communication unit 52, a second communication unit 53, a third communication unit 54, a calculation unit 61, an acquisition unit 62, a first determination unit 63, a second determination unit 64, a prediction unit 65, and a setting unit 66. Each of the units 51 to 66 of the control device 50 can be implemented by one or more processors or can be embedded in a circuit. The control device 50 is configured to communicate with the charge and discharge device 30 via the first communication unit 52. The control device 50 is configured to communicate with the electric vehicle 10 via the second communication unit 53. The control device 50 is configured to communicate with the user terminal 15 via the third communication unit 54.

[0034] The storage unit 51 stores a charge and discharge condition database DB2 and a degradation progress degree database DB3. In the charge and discharge condition database DB2, various charge and discharge conditions are registered. As the charge and discharge conditions, parameters such as current, voltage, and charge and discharge range for controlling charging, discharging, and stopping of charge and discharge are registered. In the charge and discharge condition database DB2, for example, charge and discharge conditions during normal charge and discharge, charge and discharge conditions for calculating the degradation progress degree described later, etc. are stored. In the degradation progress degree database DB3, the degradation progress degree calculated by the in-vehicle battery management device 40 is stored.

[0035] However, the degradation progress degree of the in-vehicle battery 11 can be set based on the degradation progress degree database DB1 stored in the storage unit 21 of the vehicle control device 20. In the knowledge framework of the present inventor, for example, in the case of long-term use of the electric vehicle 10 or the like, sometimes there is a deviation between the degradation progress degree set based on the degradation progress degree database DB1 and the actual degradation progress degree of the in-vehicle battery 11. For example, when determining the available charge and discharge range of the in-vehicle battery 11, the degradation progress degree of the in-vehicle battery 11 is used. When there is a deviation between the degradation progress degree set by the vehicle control device 20 and the actual degradation progress degree, there is a concern that the charge and discharge range may not be set appropriately. In the case where the charge and discharge range is not set appropriately, it may be a cause for accelerating the degradation of the in-vehicle battery 11. For example, maintaining the in-vehicle battery 11 at a relatively high SOC may be a main cause for the degradation of the in-vehicle battery 11 to progress. When the actual degradation progress degree of the in-vehicle battery 11 is lower than the set degradation progress degree, there is a concern that the battery may be charged to a SOC higher than necessary and the degradation of the in-vehicle battery 11 may further progress. The present inventor considered that it is desirable to provide a method for accurately calculating and using the degradation progress degree of the in-vehicle battery 11.

[0036] Figure 2FIG. 0 is a flowchart showing a process implemented by an in-vehicle battery management device 40. The in-vehicle battery management device 40 is configured to execute: a process S11 of controlling a charging / discharging device 30 connected to an in-vehicle battery 11 of an electric vehicle 10 to charge / discharge the in-vehicle battery 11 under predetermined processing conditions; a process S13 of calculating a degree of deterioration progress of the in-vehicle battery 11 based on charging / discharging information during charging / discharging; and a process S15 of notifying the calculated degree of deterioration progress to a predetermined notification destination. Hereinafter, each process will be specifically described.

[0037] In addition, for example, when the electric vehicle 10 is connected to a connector 31 of the charging / discharging device 30 and the user wishes to calculate the degree of deterioration progress in the in-vehicle battery management device 40, these processes are executed. These processes may also be executed periodically, for example, once a month.

[0038] In a state where the electric vehicle 10 is connected to the connector 31 of the charging / discharging device 30, a calculation signal is sent to the charging / discharging device 30 via a first communication unit 52 of a control device 50 of the in-vehicle battery management device 40, and the process S11 of controlling the charging / discharging device 30 is started. The calculation signal may be sent, for example, at a timing indicated by the user via a user terminal 15, or may be set to be sent periodically from the control device 50.

[0039] When the charging / discharging device 30 receives the calculation signal via the communication unit 33, a setting unit 34 sets the charging / discharging conditions to the charging / discharging conditions for calculating the degree of deterioration progress. In this embodiment, the charging / discharging conditions for calculating the degree of deterioration progress are stored in a charging / discharging condition database DB2. The charging / discharging conditions for calculating the degree of deterioration progress are sent from the control device 50 to the charging / discharging device 30 together with the calculation signal. Then, the charging / discharging conditions for calculating the degree of deterioration progress are set by the setting unit 34. In addition, the setting of the charging / discharging conditions for calculating the degree of deterioration progress is not limited to the above method. For example, the charging / discharging conditions may be registered in the setting unit 34 in advance, and the charging / discharging conditions for calculating the degree of deterioration progress may be set when the calculation signal is received. In this embodiment, under the charging / discharging conditions for calculating the degree of deterioration progress, first, amplification is performed until the SOC becomes a predetermined value. Next, charging is performed until the SOC becomes a predetermined value. From the viewpoint of calculating the degree of deterioration progress with high accuracy, the range of the SOC here is preferably as large as possible.

[0040] In addition, when the user does not want the deterioration development degree calculation or when it is not the timing for calculating the deterioration development degree, the calculation signal is not sent. At this time, the setting unit 34 sets normal charge and discharge conditions and starts charge and discharge. The normal charge and discharge conditions refer to, for example, the charge conditions when charging to a predetermined charge amount at a predetermined charging rate after using the electric vehicle 10. In addition, the normal charge and discharge conditions refer to, for example, those that can be determined according to the deterioration development degree set in the in-vehicle battery 11. The normal charge and discharge conditions include the charge and discharge range of the in-vehicle battery 11 determined by this deterioration development degree.

[0041] The execution unit 35 executes the discharge of the in-vehicle battery 11 in accordance with the charge and discharge conditions for calculating the deterioration development degree set by the setting unit 34. The in-vehicle battery 11 is discharged via the connector 31. The in-vehicle battery 11 is discharged until the SOC becomes a predetermined value. The SOC at this time is not particularly limited. In this embodiment, the in-vehicle battery 11 is discharged until the SOC becomes 0%. However, for example, when using multiple storage batteries as the in-vehicle battery 11 and there are deviations in the battery voltage in each storage battery, etc., it may sometimes not be possible to discharge until the SOC becomes 0%. In this case, it is discharged until the SOC approaches 0%.

[0042] The execution unit 35 executes the charge of the in-vehicle battery 11 in accordance with the charge and discharge conditions for calculating the deterioration development degree set by the setting unit 34. The in-vehicle battery 11 is charged via the connector 31. The in-vehicle battery 11 is charged until the SOC becomes a predetermined value. The SOC at this time is not particularly limited. In this embodiment, the in-vehicle battery 11 is charged at a constant current until the SOC becomes 100%. Among them, for example, when using multiple storage batteries as the in-vehicle battery 11 and there are deviations in the battery voltage in each storage battery, etc., it may sometimes not be possible to charge until the SOC becomes 100%. In this case, it is charged until the SOC approaches 100%.

[0043] During charging, the acquisition unit 36 acquires the charge and discharge information used by the in-vehicle battery management device 40 to calculate the deterioration development degree. Hereinafter, the charge and discharge information used by the in-vehicle battery management device 40 to calculate the deterioration development degree is also referred to as "charge and discharge information I". In this embodiment, the charge and discharge information I is the charge capacity until the SOC is charged from 0% to 100%. The charge and discharge information I can include, for example, the charging current, charging voltage, charging time, etc. The charge and discharge information I acquired by the acquisition unit 36 is sent to the in-vehicle battery management device 40 via the communication unit 33. The in-vehicle battery management device 40 receives the charge and discharge information I via the first communication unit 52.

[0044] During Figure 2In S13, the calculation unit 61 of the in-vehicle battery management device 40 calculates the deterioration progress degree of the in-vehicle battery 11 based on the received charge and discharge information I. In the calculation unit 61, the full charge capacity at the initial stage of use of the electric vehicle 10 is registered in advance. The calculation unit 61 calculates the deterioration progress degree of the in-vehicle battery 11 based on the registered full charge capacity and the charge and discharge information I (for example, the charge amount when charging from SOC 0% to SOC 100%). Hereinafter, the deterioration progress degree calculated by the calculation unit 61 of the in-vehicle battery management device 40 based on the charge and discharge information I is also referred to as "deterioration progress degree A".

[0045] In Figure 2 In S15, the deterioration progress degree A calculated by the in-vehicle battery management device 40 is notified to a predetermined notification destination. In this embodiment, the third communication unit 54 sends the deterioration progress degree A to the user terminal 15. In this embodiment, the user terminal 15 is configured to be able to confirm the deterioration progress degree database DB1. The user can confirm the sent deterioration progress degree A and compare it with the deterioration progress degree stored in the deterioration progress degree database DB1. The user can confirm the deterioration progress degree A and select the value set as the deterioration progress degree of the in-vehicle battery 11. For example, the user can select to set the deterioration progress degree A as the deterioration progress degree of the in-vehicle battery 11, or use the deterioration progress degree A to correct the deterioration progress degree set according to the deterioration progress degree database DB1. The setting unit 25 sets the deterioration progress degree of the in-vehicle battery 11 according to the user's selection.

[0046] However, the deterioration progress degree stored in the deterioration progress degree database DB1 of the vehicle control device 20 is a deterioration progress degree calculated under conditions different from those of the deterioration progress degree A calculated by the in-vehicle battery management device 40. In this embodiment, the deterioration progress degree calculated by the calculation unit 24 of the vehicle control device 20 is stored in the deterioration progress degree database DB1. The calculation unit 24 calculates the deterioration progress degree based on the information obtained when the electric vehicle 10 is running or during normal charge and discharge. Hereinafter, the deterioration progress degree calculated by the vehicle control device 20 is also referred to as "deterioration progress degree B". The calculation of the deterioration progress degree B can be performed at a higher frequency than the calculation of the deterioration progress degree A.

[0047] In the above-described embodiment, the in-vehicle battery management device 40 is configured to perform a process of controlling the charge / discharge device 30 so as to charge and discharge the in-vehicle battery 11 under predetermined processing conditions with respect to the charge / discharge device 30 connected to the in-vehicle battery 11 of the electric vehicle 10. Further, the in-vehicle battery management device 40 is configured to perform a process of calculating the deterioration progress degree A of the in-vehicle battery 11 based on the charge / discharge information I during the above-described charge and discharge. The deterioration progress degree A of the in-vehicle battery 11 calculated by the in-vehicle battery management device 40 can evaluate the degree of deterioration of the in-vehicle battery 11 with higher accuracy compared to the deterioration progress degree B calculated by the vehicle control device 20 of the electric vehicle 10. For example, in order to improve the computing power of the vehicle's computing device, the vehicle cost increases. Therefore, there is a limitation on the computing power distribution for evaluating the degree of deterioration of the in-vehicle battery 11 in the vehicle's computing device. In contrast, the in-vehicle battery management device 40 does not have such a limitation. Therefore, in the in-vehicle battery management device 40, in order to evaluate the degree of deterioration of the in-vehicle battery 11, a more detailed calculation can be performed.

[0048] In addition, when the vehicle control device 20 calculates the deterioration progress degree B, the charge-discharge range used for the calculation depends on the usage environment or the charge-discharge range when using the ordinary electric vehicle 10. In the vehicle control device 20 mounted on the vehicle, the charge-discharge conditions are determined according to the usage condition of the electric vehicle 10. Therefore, in the vehicle control device 20, it is difficult to realize appropriate charge-discharge conditions in terms of evaluating the deterioration degree of the in-vehicle battery 11. Moreover, the deterioration degree of the in-vehicle battery 11 can be evaluated and the deterioration progress degree B can be calculated based on the charge-discharge corresponding to the trend according to the usage condition of the electric vehicle 10. In contrast, the in-vehicle battery management device 40 performs charge-discharge on the in-vehicle battery 11 in a state where the electric vehicle 10 is connected to a charge-discharge device 30 such as a charging station. Therefore, the in-vehicle battery management device 40 is easy to realize appropriate charge-discharge conditions in terms of evaluating the deterioration degree of the in-vehicle battery 11. In this embodiment, the in-vehicle battery management device 40 can be configured to control the charge-discharge device 30 in such a way that charge-discharge is performed on the in-vehicle battery 11 under predetermined processing conditions appropriate for evaluating the deterioration degree of the in-vehicle battery 11. Then, based on the charge-discharge information I obtained in the above control, the deterioration progress degree A is calculated. For example, the following charge-discharge can be performed: in a state where the electric vehicle 10 is parked and connected to the charge-discharge device 30, after temporarily discharging the in-vehicle battery 11 until the SOC becomes 0%, the in-vehicle battery 11 is charged until the SOC becomes 100%. In this case, the charge capacity from SOC 0% to SOC 100% can be measured, and the full charge capacity can be evaluated. Moreover, by comparing with the full charge capacity at the initial stage of use of the in-vehicle battery 11, the capacity deterioration of the in-vehicle battery 11 can be evaluated. In addition, regarding the in-vehicle battery 11, when the in-vehicle battery management device 40 has data such as charge-discharge performance as a reference regarding battery performance, the charge-discharge information I obtained in the control of the in-vehicle battery management device 40 can be analyzed in more detail, and information other than the battery capacity can also be added to calculate the deterioration progress degree A. Regarding the in-vehicle battery 11, it may vary according to the vehicle type and model (type) of the electric vehicle 10, so data as a reference can be provided according to the model of the in-vehicle battery 11.

[0049] Next, the process of correcting the deterioration progress degree set in the in-vehicle battery 11 using the deterioration progress degree A calculated by the in-vehicle battery management device 40 will be described. Figure 3 It is a flowchart showing the process of correcting the deterioration progress degree set in the in-vehicle battery 11. The in-vehicle battery management device 40 is configured to further execute: Process S21, urging the correction of the deterioration progress degree B set in the in-vehicle battery 11 based on the deterioration progress degree A calculated according to the charge-discharge information I; and Process S23, receiving the result of whether the deterioration progress degree is corrected.

[0050] In Figure 3In S21, the in-vehicle battery management device 40 transmits the degradation progress degree A calculated by the in-vehicle battery management device 40 to the electric vehicle 10 via the second communication unit 53. At the same time, the in-vehicle battery management device 40 transmits a correction signal for urging correction of the degradation progress degree B set in the in-vehicle battery 11. The vehicle control device 20 of the electric vehicle 10 receives the correction signal via the first communication unit 22. When the vehicle control device 20 receives the correction signal, it transmits a confirmation signal for urging confirmation of the degradation progress degree to the user terminal 15 via the second communication unit 23. When the user terminal 15 receives the confirmation signal, the user is urged to confirm the degradation progress degree in the user terminal 15. At the same time, the user is urged to select whether correction is required based on the degradation progress degree A. When the user permits correction, the setting unit 25 of the vehicle control device 20 corrects the degradation progress degree B of the in-vehicle battery 11 according to the degradation progress degree A. When the user does not permit correction, the setting unit 25 maintains the degradation progress degree B set in the in-vehicle battery 11. After correcting the degradation progress degree, the first communication unit 23 transmits the corrected degradation progress degree to the in-vehicle battery management device 40.

[0051] In addition, the method of correction in the case of correcting the degradation progress degree B of the in-vehicle battery 11 according to the degradation progress degree A calculated by the in-vehicle battery management device 40 is not particularly limited. For example, it may be corrected in such a way that the corrected degradation progress degree becomes a value between the degradation progress degree B before correction and the degradation progress degree A. For example, it may be corrected in such a way that the corrected degradation progress degree becomes the average value of the degradation progress degree B before correction and the degradation progress degree A. By correcting in this way, the value set as the degradation progress degree of the in-vehicle battery 11 may gradually approach the degradation progress degree A. In addition, it may be corrected in such a way that the corrected degradation progress degree becomes the degradation progress degree A. The corrected degradation progress degree of the in-vehicle battery 11 may be stored in the degradation progress degree database DB1 of the vehicle control device 20. The stored degradation progress degree may be used for the calculation of the degradation progress degree in the future.

[0052] In Figure 3 In S23, the second communication unit 53 of the in-vehicle battery management device 40 receives the set degradation progress degree. Thus, the in-vehicle battery management device 40 can receive the result of whether the degradation progress degree is corrected. In addition, the received degradation progress degree may be stored in the degradation progress degree database DB3.

[0053] In the above embodiment, the degradation progress degree B of the in-vehicle battery 11 is set in the electric vehicle 10. The in-vehicle battery management device 40 is configured to execute a process of urging correction of the degradation progress degree B set in the in-vehicle battery 11 based on the degradation progress degree A calculated according to the charge-discharge information I. With the above structure, the user can correct the degradation progress degree B using the more accurately calculated degradation progress degree A.

[0054] In addition, in the above-described embodiment, after executing the process S21 of urging the correction of the deterioration progress degree B set in the in-vehicle battery 11 (refer to Figure 3 ), the user selects whether correction is required via the user terminal 15, but it is not limited to the above method. For example, it may be configured to automatically correct the deterioration progress degree of the in-vehicle battery 11 according to the deterioration progress degree A calculated by the in-vehicle battery management device 40 when the user has given prior permission.

[0055] Figure 4 is a flowchart showing the process of notifying the progress of deterioration of the in-vehicle battery 11. The in-vehicle battery management device 40 is configured to further execute: process S31 of obtaining the deterioration progress degree B calculated on the electric vehicle 10 side (i.e., the vehicle control device 20); and processes S33 and 35 of notifying the deterioration progress degree to a predetermined notification destination when at least any one of the deterioration progress degree B obtained from the electric vehicle 10 and the deterioration progress degree A calculated based on the charge / discharge information I is a predetermined value (hereinafter also referred to as "set value C") or less.

[0056] In Figure 4 S31, the obtaining unit 62 obtains the deterioration progress degree B calculated by the vehicle control device 20. In this embodiment, the deterioration progress degree B stored in the deterioration progress degree database DB1 of the vehicle control device 20 is transmitted to the in-vehicle battery management device 40 via the first communication unit 22. The obtaining unit 62 obtains the transmitted deterioration progress degree B. At this time, the obtained deterioration progress degree B may be stored in the deterioration progress degree database DB3. The obtained deterioration progress degree B may also be stored in the deterioration progress degree database DB3 separately from the deterioration progress degree A calculated by the in-vehicle battery management device 40.

[0057] In Figure 4 S33, the first determination unit 63 determines whether the deterioration progress degree A calculated by the in-vehicle battery management device 40 or the deterioration progress degree B calculated by the vehicle control device 20 is a set value C or less (i.e., A or B ≤ C). The set value C can be arbitrarily set by the user of the electric vehicle 10, for example, or can be selected by the user from options such as SOH 50%, 60%, 70%, etc. In addition, the set value C can also be set by an integrator or a vehicle repairer (such as a dealer) who inspects or repairs the electric vehicle 10, for example.

[0058] Here, when neither the deterioration progress degree A nor the deterioration progress degree B is a set value C or less, the determination in S33 is set to "no". In this case, the deterioration progress degree is not notified. When at least one of the deterioration progress degree A and the deterioration progress degree B is a set value C or less, the determination in S33 is set to "yes", and the process proceeds to S35.

[0059] In Figure 4 S35 of Figure 4 , the degradation development degrees A and B that are below the set value C are notified to a predetermined notification destination. In this embodiment, the degradation development degrees below the set value C are notified to the user. The degradation development degrees are transmitted to the user terminal 15 via the third communication unit 54. In the user terminal 15, the terminal control device 16 receives the degradation development degrees. The user can confirm the received degradation development degrees through the screen of the user terminal 15 or the like.

[0060] Figure 5 is a flowchart showing the process of performing notification processing when the degradation development degrees A and B deviate. The in-vehicle battery management device 40 is configured to further execute: process S41 of obtaining the degradation development degree B calculated on the electric vehicle 10 side (i.e., the vehicle control device 20); and processes S43 and S45 of notifying a predetermined notification destination when the difference between the degradation development degree B obtained from the electric vehicle 10 and the degradation development degree A calculated based on the charge-discharge information I is equal to or greater than a predetermined value (hereinafter also referred to as "set value D").

[0061] In Figure 5 S41 of Figure 5 , similar to Figure 4 S31 of Figure 4 , the acquisition unit 62 acquires the degradation development degree B calculated by the vehicle control device 20.

[0062] In Figure 5 S43 of Figure 5 , the second determination unit 64 determines whether the difference between the degradation development degree A calculated by the in-vehicle battery management device 40 and the degradation development degree B calculated by the vehicle control device 20 is equal to or greater than the set value D (i.e., |A - B| ≥ D). The set value D can be arbitrarily set by the user of the electric vehicle 10, for example, or can be selected by the user from options provided such as SOH 5%, 10%, etc. In addition, the set value D can also be set by an integrator or a vehicle repairer who inspects or repairs the electric vehicle 10, for example.

[0063] Here, when the degradation development degrees A and B do not differ by the set value D or more, the determination in S43 is set to "no". In this case, no notification is made to the notification destination. When the degradation development degrees A and B differ by the set value D or more, the determination in S43 is set to "yes", and the process proceeds to S45.

[0064] In Figure 5In S45 of the embodiment, when the difference between the degradation degree A and the degradation degree B is greater than the set value D, the predetermined notification destination is notified. In this embodiment, the degradation degree A and the degradation degree B are notified to the user. The degradation degree A and the degradation degree B are sent to the user terminal 15 via the third communication unit 54. In the user terminal 15, the degradation degree is received by the terminal control device 16. The user can confirm the received degradation degree through the screen of the user terminal 15 or the like.

[0065] The vehicle-mounted battery management device 40 is configured to perform a process of notifying a predetermined notification destination of the degree of degradation when at least one of the degree of degradation B obtained from the electric vehicle 10 and the degree of degradation A calculated based on the charge and discharge information I is below a predetermined value. In this way, the degradation of the vehicle-mounted battery 11 is determined based on the two degrees of degradation A and B calculated by different calculation methods. By being notified that at least one of the degree of degradation A and the degree of degradation B is below a set value C, the user can grasp the progress of the degradation of the vehicle-mounted battery 11 at an early stage.

[0066] In addition, the on-vehicle battery management device 40 is configured to perform processing to notify a predetermined notification destination when the degradation development degree B obtained from the electric vehicle 10 and the degradation development degree A calculated based on the charge and discharge information I differ by more than a predetermined value. In the case where the difference between the degradation development degree A and the degradation development degree B calculated under different conditions is large, for example, there is a possibility that the charge and discharge conditions during normal charge and discharge are not properly set. In the case where the degradation development degree A and the degradation development degree B differ by more than a set value D, by receiving the notification, the user can take measures such as re-modifying the charge and discharge conditions such as the charge and discharge range, or accepting an inspection of the on-vehicle battery 11 at an early stage. As a result, the on-vehicle battery 11 can be used for a longer period of time.

[0067] In addition, the notification destination is not limited to the user. For example, the notification may be sent to an integrator or a vehicle maintenance worker who inspects or repairs the electric vehicle 10. By notifying the integrator or vehicle maintenance worker of the progress of the deterioration of the vehicle battery 11, the integrator or vehicle maintenance worker can urge the user to check the electric vehicle 10 or the vehicle battery 11. As a result, the cause of the deterioration of the vehicle battery 11 is found out at an early stage, and the vehicle battery 11 can be used for a longer period of time.

[0068] Figure 6 1 is a flowchart showing the process of estimating the life of the vehicle-mounted battery 11. The vehicle-mounted battery management device 40 is configured to further execute: a process S51 of storing the degradation progress degree A calculated based on the charge and discharge information I; and a process S53 of estimating the life of the vehicle-mounted battery 11 based on the stored degradation progress degree A.

[0069] exist Figure 6In S51, the storage unit 51 stores the deterioration progress degree A calculated by the calculation unit 61. The deterioration progress degree A is stored in the deterioration progress degree database DB3. In the deterioration progress degree database DB3, the deterioration progress degree A calculated before this process is also stored. In the deterioration progress degree database DB3, for example, the usage period obtained from the start date and time of use of the electric vehicle 10 and the date and time when the deterioration progress degree A is calculated and the calculated deterioration progress degree A are associated and stored.

[0070] In Figure 6 In S53, the estimation unit 65 estimates the life of the in-vehicle battery 11 based on the stored deterioration progress degree A. The method for estimating the life of the in-vehicle battery 11 is not particularly limited. In this embodiment, based on the correlation between the accumulated deterioration progress degree A and the usage period, the deterioration progress degree A after a predetermined period from the current time is estimated. For example, the deterioration progress degree may be subjected to a fitting process as a function of the usage period to obtain the correlation between the deterioration progress degree and the usage period. In addition, the user of the electric vehicle 10 can set a lower limit value of the deterioration progress degree A of the in-vehicle battery 11. The lower limit value of the deterioration progress degree A can be set, for example, by an integrator or a vehicle repairer who inspects or repairs the electric vehicle 10. The life of the in-vehicle battery 11 can be estimated based on the set lower limit value and the above-mentioned correlation.

[0071] As described above, the in-vehicle battery management device 40 is configured to execute: a process of storing the deterioration progress degree A calculated based on the charge / discharge information I; and a process of estimating the life of the in-vehicle battery 11 based on the stored deterioration progress degree A. With the above structure, the available period of the in-vehicle battery 11 is grasped. Although not particularly limited, the estimated life of the in-vehicle battery 11 can be sent to the user terminal 15 via the third communication unit 54, for example. The user can grasp the estimated value of the life of the in-vehicle battery 11 through the user terminal 15.

[0072] In addition, the in-vehicle battery management device 40 is configured to further execute a process of setting the charge / discharge conditions of the in-vehicle battery 11 based on the deterioration progress degree A calculated according to the charge / discharge information I. The charge / discharge conditions here are, for example, the charge / discharge range, charge / discharge current / voltage, etc. when using the electric vehicle 10 or charging / discharging the in-vehicle battery 11.

[0073] Here, the setting unit 66 sets the charge-discharge conditions based on the deterioration progress degree A calculated by the calculation unit 61. In setting the charge-discharge conditions, information related to the deterioration progress degree or charge-discharge of the in-vehicle battery 11 possessed by the integrator can be used. When the deterioration progress degree A is low, the charge amount of the in-vehicle battery 11 is set to be less. That is, it can be set that the charge amount of the in-vehicle battery 11 gradually decreases over time as the in-vehicle battery 11 deteriorates. When the in-vehicle battery 11 is in a state with a high SOC, the deterioration may further progress. When the deterioration of the in-vehicle battery 11 progresses as the electric vehicle 10 is used, the full charge capacity of the in-vehicle battery 11 becomes low. Therefore, without changing the charge amount of the in-vehicle battery 11, the SOC during charging becomes relatively high. By setting the charge amount of the in-vehicle battery 11 to gradually decrease, it is possible to suppress the in-vehicle battery 11 from being in a state with a high SOC during charging. By being configured to execute the process of setting the charge-discharge conditions of the in-vehicle battery 11 based on the deterioration progress degree A calculated according to the charge-discharge information I, the deterioration of the in-vehicle battery 11 can be reduced.

[0074] As described above, various examples of the charge-discharge control device disclosed herein have been explained. Unless otherwise specified, the embodiments etc. presented here do not limit the present invention. In addition, the in-vehicle battery management device or in-vehicle battery management system disclosed here can be variously changed, and as long as no particular problem occurs, each component and each process mentioned here can be appropriately omitted or appropriately combined.

Claims

1. A vehicle-mounted battery management device, wherein, a control device is provided, and the control device controls a charging / discharging device connected to a vehicle-mounted battery of an electric vehicle so as to charge and discharge the vehicle-mounted battery under predetermined processing conditions. A degree of deterioration progress of the vehicle-mounted battery is set in the electric vehicle. The control device includes: a calculation unit that calculates the degree of deterioration progress of the vehicle-mounted battery based on charging / discharging information during charging and discharging according to charging / discharging conditions for calculating the degree of deterioration progress; a first communication unit that notifies the calculated degree of deterioration progress to a predetermined notification destination; and a second communication unit configured to perform the following processing: prompting correction of the degree of deterioration progress set for the vehicle-mounted battery based on the degree of deterioration progress calculated according to the charging / discharging information; and receiving a result indicating whether the degree of deterioration progress has been corrected.

2. The vehicle-mounted battery management device according to claim 1, wherein, in the electric vehicle, the degree of deterioration progress is calculated based on information obtained during driving of the electric vehicle or normal charging and discharging, and the calculated degree of deterioration progress is set as the degree of deterioration progress of the vehicle-mounted battery. The information obtained during normal charging and discharging is charging / discharging information according to charging / discharging conditions when charging and discharging to a predetermined charging amount at a predetermined charging / discharging rate after using the electric vehicle. The control device further includes: an acquisition unit that acquires the degree of deterioration progress calculated on the electric vehicle side; and a first determination unit that determines whether at least any one of the degree of deterioration progress obtained from the electric vehicle and the degree of deterioration progress calculated by the calculation unit based on the charging / discharging information is equal to or less than a predetermined value. When at least any one of the degree of deterioration progress obtained from the electric vehicle and the degree of deterioration progress calculated by the calculation unit based on the charging / discharging information is equal to or less than a predetermined value, the first communication unit notifies the degree of deterioration progress equal to or less than the predetermined value to a predetermined notification destination.

3. The vehicle-mounted battery management device according to claim 1 or 2, wherein, in the electric vehicle, the degree of deterioration progress is calculated and the calculated degree of deterioration progress is set as the degree of deterioration progress of the vehicle-mounted battery. The control device further includes: an acquisition unit that acquires the degree of deterioration progress calculated on the electric vehicle side; and a second determination unit that determines whether the degree of deterioration progress obtained from the electric vehicle and the degree of deterioration progress calculated by the calculation unit based on the charging / discharging information differ by a predetermined value or more. When the degree of deterioration progress obtained from the electric vehicle and the degree of deterioration progress calculated by the calculation unit based on the charging / discharging information differ by a predetermined value or more, the first communication unit notifies the degree of deterioration progress obtained from the electric vehicle and the degree of deterioration progress calculated by the calculation unit to a predetermined notification destination.

4. The vehicle-mounted battery management device according to claim 1 or 2, wherein, The control device further includes: a storage unit that stores the degree of deterioration progress calculated by the calculation unit based on the charging / discharging information; and A prediction unit that predicts the lifespan of the in-vehicle battery based on the stored degree of deterioration progress.

5. The in-vehicle battery management device according to claim 1 or 2, wherein the control device further includes a setting unit that sets the charge-discharge conditions of the in-vehicle battery based on the degree of deterioration progress calculated by the calculation unit from the charge-discharge information.

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