Control device and control method

Abstract

To provide a control device capable of suppressing deterioration of a battery by controlling a temperature of the battery after charging of the battery is completed.SOLUTION: There is provided a control device for a vehicle which includes a rotary electric machine for driving the vehicle, a power storage device for transferring electric power to and from the rotary electric machine, and a cooling device for cooling the power storage device. The control device includes: an acquisition unit for acquiring a temperature of the power storage device after charging of the power storage device by an external power source is completed; and a cooling device control unit for controlling operation of the cooling device on the basis of a comparison result between the acquired temperature and a threshold temperature set as a condition for activating the cooling device after the charging of the power storage device is completed. The threshold temperature is lower than a charging threshold temperature set as a condition for activating the cooling device during the charging of the power storage device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a control device and a control method. [Background technology]

[0002] In recent years, research and development has been conducted on secondary batteries that contribute to energy efficiency in order to ensure that more people have access to affordable, reliable, sustainable, and advanced energy. For example, suppressing the temperature rise of a battery is known as a measure to suppress deterioration of the battery mounted on an electric vehicle and extend its lifespan. For example, in an electric vehicle having a cooling fan for cooling the battery, a method is known for determining the operation of the cooling fan so as to suppress the battery from becoming too hot while the vehicle is in operation (see Patent Document 1). In addition, a method is known for determining the operation of the cooling fan based on the result of comparing the battery temperature during charging with a reference temperature (see Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6217618 [Patent Document 2] JP 2004-88985 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in technologies related to secondary batteries, the SOH (State Of Health) of a battery is used as an index related to the life of the battery. In order to keep this SOH high, it is important to control the average temperature (lifetime temperature) of the battery over the entire period of use. Conventionally, it has been possible to suppress the rise in battery temperature while the vehicle is running or while the battery is being charged. However, no method has been known for suppressing the rise in battery temperature during periods other than while the vehicle is running or while the battery is being charged. In particular, the period during which the vehicle is left unattended with the charging gun engaged after the battery charging is completed is relatively long, and in summer or in areas with a high annual average temperature, the battery temperature may rise even during this period of unattended use after charging.

[0005] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a control device and a control method capable of suppressing deterioration of a battery by controlling the temperature after charging of the battery is completed, and thereby contributing to energy efficiency. [Means for solving the problem]

[0006] The control device and the control method according to the present invention employ the following configuration. (1) A control device according to one aspect of the present invention is a control device for a vehicle including a rotating electric machine for driving the vehicle, an electric storage device that exchanges electric power with the rotating electric machine, and a cooling device that cools the electric storage device. The control device includes an acquisition unit that acquires a temperature of the electric storage device after charging of the electric storage device by an external power source is completed, and a cooling device control unit that controls an operation of the cooling device based on a comparison result between the acquired temperature and a threshold temperature set as a condition for starting the cooling device after charging of the electric storage device is completed, the threshold temperature being lower than a charging threshold temperature set as a condition for starting the cooling device while the electric storage device is being charged.

[0007] In an aspect (2), in the control device according to the aspect (1) above, the threshold temperature is a fixed temperature for achieving a predetermined target value set regarding the performance of the power storage device.

[0008] In an aspect (3), in the control device according to the aspect (1) above, a calculation unit is further provided which calculates the threshold temperature for achieving a predetermined target value set for the performance of the storage device based on a usage status of the storage device.

[0009] In an aspect (4), in the control device according to the aspect (3) above, the calculation unit calculates the threshold temperature so that an average value of the temperature of the storage device when the storage device is used for a predetermined period of time becomes a target temperature.

[0010] In an aspect (5), in the control device related to the aspect (3) above, the acquisition unit acquires an external temperature of the vehicle, and the calculation unit calculates the threshold temperature based on the acquired external temperature of the vehicle.

[0011] In an aspect (6), in the control device according to the aspect (1) above, a vehicle control unit is further provided that puts the vehicle into a sleep state after charging of the power storage device is completed, and then starts the vehicle periodically, and the cooling device control unit controls the operation of the cooling device based on a comparison result between the temperature of the power storage device obtained when the vehicle is started periodically and the threshold temperature.

[0012] In an aspect (7), the control device according to the aspect (1) above further includes a charge control unit that controls charging of the power storage device by an external power supply.

[0013] In an embodiment (8), in the control device according to the embodiment (7) above, a measurement unit is further provided that measures a charging rate of a second storage device that supplies power to the cooling device, and when the charging rate of the second storage device is lower than a threshold charging rate after the cooling device has completed cooling of the storage device following completion of charging of the storage device, the charging control unit charges the second storage device with power provided by the storage device.

[0014] (9) A control method according to another aspect of the present invention is a control method for a vehicle including a rotating electric machine for driving the vehicle, an electric storage device that exchanges electric power with the rotating electric machine, and a cooling device that cools the electric storage device. The control method includes a computer that puts the vehicle into a sleep state after charging of the electric storage device by an external power source is completed, and then periodically starts up the vehicle, acquires a temperature of the electric storage device after charging of the electric storage device is completed, and controls operation of the cooling device based on a comparison result between the acquired temperature and a threshold temperature set as a condition for starting the cooling device after charging of the electric storage device is completed, the threshold temperature being lower than a charging threshold temperature set as a condition for starting the cooling device while the electric storage device is being charged.

[0015] In an aspect (10), in the control method according to the aspect (9) above, an external temperature of the vehicle is acquired, and the threshold temperature is calculated based on the acquired external temperature of the vehicle. Effect of the Invention

[0016] According to the above aspects (1) to (10), deterioration of the battery can be suppressed by controlling the temperature of the battery after charging of the battery is completed. According to the above aspects (3) to (5), by calculating a variable threshold temperature depending on the usage environment of the battery, etc., it is possible to control the temperature of the battery after charging of the battery is completed with higher accuracy and suppress deterioration of the battery. [Brief description of the drawings]

[0017] [Figure 1]1 is a diagram showing an example of the configuration of a vehicle M according to an embodiment. [Diagram 2] FIG. 2 is a functional block diagram showing an example of a control unit 40 according to the embodiment. [Diagram 3] 5 is a flowchart showing an example of the flow of a charging process executed by a control unit 40 according to the embodiment. [Figure 4] 6 is a graph showing the change over time of a battery 52 during a charging process according to the embodiment. [Diagram 5] 10 is a flowchart showing an example of a process flow for calculating a threshold temperature in a third cooling control executed by a control unit 40 according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of a control device and a control method of the present invention will be described with reference to the drawings. The control device of the embodiment controls charging of a battery provided in an electric vehicle (hereinafter, "vehicle M"). The vehicle M is, for example, a two-wheeled, three-wheeled, or four-wheeled vehicle, and its drive source is a rotating electric machine (motor), an internal combustion engine such as a diesel engine or a gasoline engine, or a combination of these. The rotating electric machine operates using power generated by a generator connected to the internal combustion engine, or using power discharged from a battery. Hereinafter, the vehicle M is assumed to be, for example, an electric vehicle that runs by an electric motor driven by power supplied from an on-board battery, such as a BEV (Battery Electric Vehicle) or an HEV (Hybrid Electric Vehicle).

[0019] [Vehicle M] FIG. 1 is a diagram showing an example of the configuration of a vehicle M according to an embodiment. The vehicle M includes, for example, a motor 10, driving wheels 12, a brake device 14, a vehicle sensor 20, a PCU (Power Control Unit) 30, a control unit 40, a power supply device 50, an air conditioning device 60, and a low-voltage battery 70. The power supply device 50 includes, for example, a battery 52, a battery sensor 54, and a cooling device 56. The vehicle M is an example of a "vehicle." The motor 10 is an example of a "rotating electric machine" for driving the vehicle. The battery 52 is an example of an "electricity storage device" that exchanges electric power with the rotating electric machine. The cooling device 56 is an example of a "cooling device" that cools the electricity storage device. The low-voltage battery 70 is an example of a "second electricity storage device."

[0020] The motor 10 is, for example, a three-phase AC motor. A rotor of the motor 10 is connected to the drive wheels 12. The motor 10 outputs power to the drive wheels 12 using electric power supplied from a battery 52. ​​The motor 10 also generates power using the kinetic energy of the vehicle when the vehicle decelerates.

[0021] The braking device 14 includes, for example, a brake caliper, a cylinder that transmits hydraulic pressure to the brake caliper, and an electric motor that generates hydraulic pressure in the cylinder. The braking device 14 may include a backup mechanism that transmits hydraulic pressure generated by operating the brake pedal to the cylinder via a master cylinder. The braking device 14 is not limited to the configuration described above, and may be an electronically controlled hydraulic brake device that transmits hydraulic pressure from a master cylinder to the cylinder.

[0022] The vehicle sensor 20 includes an accelerator opening sensor, a vehicle speed sensor, and a brake depression sensor. The accelerator opening sensor is attached to an accelerator pedal that receives an acceleration command from a driver. The accelerator opening sensor detects the amount of operation of the accelerator pedal, and outputs the detected amount of operation to the control unit 40 as the accelerator opening. The vehicle speed sensor includes, for example, wheel speed sensors attached to each wheel and a speed calculator. The vehicle speed sensor integrates the wheel speeds detected by the wheel speed sensors to derive the speed of the vehicle (vehicle speed), and outputs the derived speed information to the control unit 40. The brake depression sensor is attached to the brake pedal. The brake depression sensor detects the amount of operation of the brake pedal, and outputs the detected amount of operation to the control unit 40 as the brake depression.

[0023] The PCU 30 includes, for example, a converter 32 and a VCU (Voltage Control Unit) 34. The converter 32 is connected between a battery 52 and the motor 10. The converter 32 converts the power output by the VCU 34 into power suitable for the motor 10 and supplies the power to the motor 10. The converter 32 is, for example, an AC-DC converter. A DC side terminal of the converter 32 is connected to a DC link DL. The battery 52 is connected to the DC link DL via the VCU 34. The converter 32 converts the AC power generated by the motor 10 into DC power and outputs the DC power to the DC link DL.

[0024] The VCU 34 is connected between the battery 52 and the motor 10. The VCU 34 increases or decreases the voltage of the power supplied from the battery 52, and outputs the power to the DC link DL. The VCU 34 is, for example, a DC-DC converter.

[0025] The control unit 40 controls the overall operation of the vehicle M. The control unit 40 controls the motor 10 and the brake device 14, for example, based on information output by the vehicle sensor 20. The control unit 40 also controls the VCU 34 to adjust the power supplied to the motor 10, for example, based on information output by the vehicle sensor 20. The control unit 40 also controls the charging process of the battery 52 by the external power source 100, and the temperature of the battery 52 (cooling device 56) during the charging process.

[0026] Each of the functional parts of the control unit 40 is realized by, for example, a computer processor such as an ECU (Electronic Control Unit) or a CPU (Central Processing Unit) executing a program (software). Each of the functional parts of the control unit 40 may be realized by hardware (circuit parts) such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a GPU (Graphics Processing Unit), or may be realized by a combination of software and hardware. Each of the functions of the control unit 40 may be incorporated into a separate control device, for example, a control device such as a motor ECU, a brake ECU, or a battery / VCUECU. The functions of the control unit 40 will be described in detail later.

[0027] The battery 52 supplies power to various components mounted on the vehicle M. The battery 52 is, for example, a battery pack including a power storage unit (not shown) that stores power used for the vehicle M to travel. The battery 52 may be, for example, a cassette-type battery pack that is easily detachable from the vehicle M, or may be a stationary type that is not easily detachable from the vehicle M. The power storage unit (not shown) included in the battery 52 is, for example, a chargeable and dischargeable secondary battery such as a lithium ion battery. Examples of the secondary battery included in the battery 52 include a lead-acid battery, a nickel-metal hydride battery, a sodium ion battery, and the like, as well as a capacitor such as an electric double layer capacitor, or a composite battery that combines a secondary battery and a capacitor. The battery 52 can be charged by power provided by an external power source 100 that is a charger outside the vehicle M. The battery 52 may be a FCS (Fuel Cell Stack).

[0028] The battery sensor 54 measures physical quantities such as the current, voltage, and temperature of the battery 52. ​​The battery sensor 54 includes, for example, a current sensor, a voltage sensor, and a temperature sensor. The battery sensor 54 measures the temperature of the battery 52 under the control of the control unit 40, for example, and outputs information indicating the measured temperature to the control unit 40. The battery sensor 54 also measures the current and voltage of the battery 52, and outputs information indicating the measured current and voltage to the control unit 40.

[0029] The cooling device 56 cools the battery 52, for example, based on the control of the control unit 40. The cooling device 56 is, for example, a heat exchanger (chiller) that exchanges heat between a heat medium and an air-conditioning heat medium. The heat medium is, for example, water, radiator liquid, coolant liquid, etc. The air-conditioning heat medium is, for example, freon, alternative freon, etc. The cooling device 56 may be equipped with a cooling fan that supplies cooling air to the battery 52.

[0030] The air conditioner 60 adjusts the temperature inside the passenger compartment of the vehicle M in accordance with the control of the control unit 40 based on instructions input by an occupant of the vehicle M via an input interface (not shown), for example.

[0031] The low-voltage battery 70 supplies power to the cooling device 56. The low-voltage battery 70 is, for example, a 12 V battery. The low-voltage battery 70 may also supply power to various other components mounted on the vehicle M.

[0032] The external power source 100 supplies power to the battery 52 of the vehicle M. The external power source 100 includes, for example, a charging cable 104 and a charging gun 102 connected to the charging cable 104. The charging gun 102 is connected to a charging port (not shown) provided on the body of the vehicle M by an occupant of the vehicle M or the like. The external power source 100 supplies power to the battery 52 of the vehicle M via the charging cable 104 and the charging gun 102, thereby charging the battery 52. ​​Alternatively, the charging cable may be provided on the body or the like so as to be able to be pulled out to the outside of the vehicle M. A first end of both ends of the charging cable is fixed to the vehicle M, and a charging plug is provided on a second end of both ends of the charging cable 104. The charging plug is connected to a plug receptacle of the external power source 100, which is, for example, a household outlet (hardware plug connector) or the like.

[0033] [Configuration of control unit 40] 2 is a functional block diagram showing an example of a control unit 40 according to an embodiment. The control unit 40 includes, for example, an acquisition unit 41, a threshold temperature calculation unit 42, a charging control unit 43, a cooling device control unit 44, a vehicle control unit 45, and a measurement unit 46.

[0034] The acquisition unit 41 acquires the temperature of the battery 52 measured by the battery sensor 54. The acquisition unit 41 acquires the temperature of the battery 52 after charging of the battery 52 by the external power supply 100 is completed. The acquisition unit 41 also acquires information on the external temperature of the vehicle M (changes in the external temperature) from an external server (not shown) or the like. The acquisition unit 41 is an example of an "acquisition unit".

[0035] The threshold temperature calculation unit 42 calculates a threshold temperature for achieving a predetermined target value set for the performance of the battery 52 based on the usage status of the battery 52. ​​The threshold temperature calculation unit 42 also calculates the threshold temperature so that the average value of the temperature of the battery 52 when the battery 52 is used for a predetermined period of time becomes the target temperature. The threshold temperature calculation unit 42 also calculates the threshold temperature based on the external temperature of the vehicle M. The target value for performance is, for example, maintaining the capacity maintenance rate of the battery 52 at 70% or more after 10 years have passed since the start of use. The capacity maintenance rate is expressed by, for example, SOH (State Of Health). This SOH is the ratio of the full charge capacity (Ah) during use (deterioration) when the initial full charge capacity (Ah) of the battery 52 is taken as 100%. The threshold temperature calculation unit 42 is an example of a "calculation unit".

[0036] The charging control unit 43 controls charging of the battery 52 by the external power supply 100. Furthermore, when the charging rate of the low-voltage battery 70 is lower than the threshold charging rate after the cooling device 56 has completed cooling of the battery 52, the charging control unit 43 causes the low-voltage battery 70 to be charged with power provided by the battery 52. ​​The charging control unit 43 is an example of a "charging control unit".

[0037] The cooling device control unit 44 controls the operation of the cooling device 56 based on a comparison result between the temperature of the battery 52 acquired by the acquisition unit 41 (the temperature during charging of the battery 52, the temperature after charging of the battery 52 is completed, and the temperature when the vehicle M is periodically started after charging of the battery 52 is completed) and a threshold temperature. The threshold temperature set as a condition for starting the cooling device after charging of the battery 52 is completed is lower than the threshold temperature during charging set as a condition for starting the cooling device 56 during charging of the battery 52. ​​The cooling device control unit 44 is an example of a "cooling device control unit." The threshold temperature is a fixed temperature for achieving a predetermined target value set for the performance of the battery 52, or a variable temperature calculated by the threshold temperature calculation unit 42 described above.

[0038] The vehicle control unit 45 controls the startup of the vehicle M. After charging of the battery 52 by the external power supply 100 is completed, the vehicle control unit 45 puts the vehicle M into a sleep state, and thereafter periodically starts up the vehicle M. The vehicle control unit 45 is an example of a "vehicle control unit."

[0039] The measurement unit 46 measures the charging rate of the low-voltage battery 70 that supplies power to the cooling device 56. The measurement unit 46 calculates the SOC (State of charge) of the low-voltage battery 70 based on the output (current, voltage) from the low-voltage battery 70, for example.

[0040] [Processing flow] Next, an example of a charging process for the battery 52 centered on the operation of the control unit 40 will be described. Fig. 3 is a flowchart showing an example of the flow of the charging process executed by the control unit 40 according to the embodiment. The process shown in Fig. 3 is started, for example, after an occupant of the vehicle M stops the vehicle M at a facility (such as a home or a charging station) where an external power source 100 capable of charging the battery 52 is installed, and performs an operation to start charging the vehicle M or the external power source 100. Fig. 4 is a graph showing the change over time of the battery 52 during the charging process according to the embodiment.

[0041] First, the charging control unit 43 determines whether or not the charging gun 102 of the external power source 100 is engaged with the charging port of the vehicle M (step S101). If it is determined that the charging gun 102 of the external power source 100 is not engaged (step S101: No), the charging control unit 43 continues the same determination.

[0042] On the other hand, if it is determined that the charging gun 102 of the external power source 100 is engaged (step S101: Yes), the charging control unit 43 starts charging the battery 52 (step S103). When charging of the battery 52 starts, a first cooling control is performed under the control of the control unit 40. The acquisition unit 41 acquires the temperature of the battery 52 measured by the battery sensor 54 (step S105). As shown in FIG. 4, after the charging gun 102 of the external power source 100 is engaged with the charging port of the vehicle M at time t1, the temperature of the battery 52 rises as charging starts.

[0043] Next, the cooling device control unit 44 determines whether or not the temperature of the battery 52 obtained is equal to or higher than the first upper limit threshold Th1_u (step S107). This first upper limit threshold Th1_u is the temperature that serves as a condition for starting the cooling device 56 during charging of the battery 52. When the cooling device control unit 44 determines that the temperature of the battery 52 is equal to or higher than the first upper limit threshold Th1_u, it activates the cooling device 56 to perform a cooling process (first cooling process) on the battery 52 (step S109). This first cooling process is a process aimed at improving the charging efficiency (shortening the charging time) by preventing excessive temperature rise of the battery 52 during charging, for example. This first cooling process continues until the temperature of the battery 52 drops to the first lower limit threshold Th1_b (Th1_b < Th1_u).

[0044] Next, when it is determined that the temperature of the battery 52 is not equal to or higher than the first upper limit threshold Th1_u, or while it is determined that the temperature of the battery 52 is equal to or higher than the first upper limit threshold Th1_u and the first cooling process is being performed, the charge control unit 43 determines whether or not the charging process of the battery 52 has been completed (step S111). For example, the charge control unit 43 determines whether or not the battery 52 is in a fully charged state (whether or not the SOC exceeds the threshold). When it is determined that the charging process of the battery 52 has not been completed (step S111: No), the process returns to step S105, and the subsequent processes are repeated.

[0045] On the other hand, when it is determined that the charging process of the battery 52 has been completed (step S111: Yes), the charge control unit 43 stops the charging process, and under the control of the control unit 40, the second cooling control is performed. The cooling device control unit 44 changes the operation mode of the cooling device 56 to perform the cooling process (second cooling process) of the battery 52 (step S113). This second cooling process is a process aimed at, for example, quickly reducing the temperature of the battery 52 immediately after charging to prevent performance degradation of the battery 52 (improve lifetime durability and extend the life). This second cooling process continues until the temperature of the battery 52 drops to the second lower threshold Th2_b (Th2_b < Th1_b, Th1_u). As shown in FIG. 4, after it is determined that the charging process of the battery 52 has been completed at time t2, the temperature of the battery 52 gradually decreases by the second cooling process, reaches the second lower threshold Th2_b at time t3, and the second cooling process ends. After the second cooling process ends, the vehicle control unit 45 sets the vehicle M to the sleep state (ignition OFF state).

[0046] After the completion of the above-described second cooling process, the vehicle M enters a sleep state. However, due to the influence of the outside air temperature of the vehicle M or the like, the temperature of the battery 52 may increase. In particular, in the summer or in regions with a high annual average temperature, the temperature of the battery 52 may also increase during this period of leaving the vehicle after charging. Therefore, in the present embodiment, after the completion of the above-described second cooling process, under the control of the control unit 40, a third cooling control is performed. In this third cooling control, the vehicle control unit 45 periodically starts (ignition ON) the vehicle M (step S115). The vehicle control unit 45 starts the vehicle M at regular monitoring timings such as the times t4, t5, t6 shown in FIG. 4. When the vehicle M is periodically started, the acquisition unit 41 acquires the temperature of the battery 52 measured by the battery sensor 54 (step S117). Subsequently, the cooling device control unit 44 determines whether or not the acquired temperature of the battery 52 is equal to or higher than a second upper limit threshold Th2_u (step S119). This second upper limit threshold Th2_u is the temperature that serves as a condition for starting the cooling device 56 during the period of leaving the vehicle after charging the battery 52. When the cooling device control unit 44 determines that the temperature of the battery 52 is equal to or higher than the second upper limit threshold Th2_u, the cooling device 56 is started to perform a cooling process (third cooling process) on the battery 52 (step S121). This third cooling process is a process aimed at preventing a decrease in the performance of the battery 52 (improving lifetime durability and extending the life) by, for example, preventing an increase in the temperature of the battery 52 during the period of leaving the vehicle after charging. This third cooling process is continued until the temperature of the battery 52 decreases to a second lower limit threshold Th2_b (Th2_b < Th2_u). In the example shown in FIG. 4, at time t5, the temperature of the battery 52 reaches the second upper limit threshold Th2_u, and thereafter, the third cooling process is performed, and the temperature of the battery 52 decreases to the second lower limit threshold Th2_b.

[0047] Next, if it is determined that the temperature of the battery 52 is not equal to or higher than the second upper limit threshold Th2_u, or while the temperature of the battery 52 is determined to be equal to or higher than the second upper limit threshold Th2_u and the third cooling process is being performed, the charging control unit 43 determines whether or not the charging gun 102 has been removed (step S123). If it is determined that the charging gun 102 has not been removed (step S123: No), the charging control unit 43 again puts the vehicle M into a sleep state (ignition OFF state), returns to step S115, periodically starts the vehicle M, and the subsequent processes are repeated. On the other hand, if it is determined that the charging gun 102 has been removed (step S123: Yes, time t7 in the example shown in FIG. 4), the process of this flowchart ends.

[0048] In the above, an example has been described in which the second upper limit threshold Th2_u and the second lower limit threshold Th2_b, which are conditions for starting and stopping the cooling device 56 during the unused period after charging of the battery 52 in the third cooling control, are fixed values. However, the second upper limit threshold Th2_u and the second lower limit threshold Th2_b may be variable values ​​calculated according to the environment (external temperature) in which the battery 52 is placed.

[0049] 5 is a flowchart showing an example of a process flow for calculating a threshold temperature in the third cooling control executed by the control unit 40 according to the embodiment. First, the acquisition unit 41 acquires information on the external temperature of the vehicle M from an external server (not shown) or the like (step S201). The information on the external temperature may include a predicted value of a future change in the external temperature in addition to the current external temperature.

[0050] Next, the threshold temperature calculation unit 42 calculates threshold temperatures (second upper threshold Th2_u and second lower threshold Th2_b) for achieving a predetermined target value set for the performance of the battery 52 based on the acquired information on the external temperature (step S203). For example, the threshold temperature calculation unit 42 calculates the threshold temperature so that the capacity maintenance rate 10 years after the start of use of the battery 52 can be kept at 70% or more (for example, so that the average value of the lifetime temperature is 27 degrees). The threshold temperature calculation unit 42 calculates the threshold temperature based on history information of the past temperature of the battery 52 (use information of the battery 52) stored in the memory of the vehicle M and information on the external temperature. The threshold temperature calculation unit 42 calculates the threshold temperature using reference information indicating the relationship between the use temperature of the battery and the capacity maintenance rate stored in the memory of the vehicle M.

[0051] Next, the threshold temperature calculation unit 42 stores the calculated threshold temperatures (second upper limit threshold Th2_u and second lower limit threshold Th2_b) in the memory of the vehicle M (step S205). Thereafter, the cooling device control unit 44 performs the above-mentioned third cooling control by comparing the threshold temperatures (second upper limit threshold Th2_u and second lower limit threshold Th2_b) with the temperature of the battery 52.

[0052] According to the present embodiment described above, the temperature after the battery has been fully charged by an external power source is acquired, and the operation of the cooling device is controlled based on the comparison result between the acquired temperature and a threshold temperature set as a condition for starting the cooling device after the battery has been fully charged. This makes it possible to control the battery temperature after the battery has been fully charged, suppress battery deterioration, and ultimately extend the battery life.

[0053] The above describes the form for carrying out the present invention using an embodiment, but the present invention is not limited to such an embodiment, and various modifications and substitutions can be made within the scope that does not deviate from the gist of the present invention. [Explanation of symbols]

[0054] 10...motor, 12...driving wheels, 14...brake device, 20...vehicle sensor, 30...PCU, 32...converter, 34...VCU, 40...control unit, 41...acquisition unit, 42...threshold temperature calculation unit, 43...charging control unit, 44...cooling device control unit, 45...vehicle control unit, 46...measurement unit, 50...power supply unit, 52...battery, 54...battery sensor, 56...cooling device, 60...air conditioner, 70...low-voltage battery, 100...external power supply, 102...charging gun, 104...charging cable, M...vehicle

Claims

1. A control device for a vehicle including a rotating electric machine for driving the vehicle, an electric storage device that exchanges electric power between the rotating electric machine and the electric storage device, and a cooling device that cools the electric storage device, The control device includes: an acquisition unit that acquires a temperature of the power storage device after charging of the power storage device by an external power source is completed; a cooling device control unit that controls an operation of the cooling device based on a comparison result between the acquired temperature and a threshold temperature that is set as a condition for starting the cooling device after charging of the power storage device is completed; Equipped with the threshold temperature is lower than a charging threshold temperature set as a condition for starting the cooling device while the power storage device is being charged; Control device.

2. The threshold temperature is a fixed temperature for achieving a predetermined target value set regarding the performance of the power storage device. The control device according to claim 1 .

3. a calculation unit that calculates the threshold temperature for achieving a predetermined target value set for the performance of the power storage device, The control device according to claim 1 .

4. the calculation unit calculates the threshold temperature such that an average value of a temperature of the power storage device when the power storage device is used for a predetermined period of time becomes a target temperature. The control device according to claim 3.

5. The acquisition unit acquires an external temperature of the vehicle, The calculation unit calculates the threshold temperature based on the acquired external temperature of the vehicle. The control device according to claim 3.

6. a vehicle control unit that puts the vehicle into a sleep state after charging of the power storage device is completed, and thereafter periodically starts up the vehicle; the cooling device control unit controls the operation of the cooling device based on a comparison result between the temperature of the power storage device acquired when the vehicle is periodically started and the threshold temperature. The control device according to claim 1 .

7. Further comprising a charge control unit that controls charging of the power storage device by an external power source. The control device according to claim 1 .

8. a measurement unit that measures a charging rate of a second power storage device that supplies power to the cooling device; the charging control unit, when a charging rate of the second power storage device is lower than a threshold charging rate after the cooling device has completed cooling of the power storage device after charging of the power storage device is completed, charges the second power storage device with power provided by the power storage device; The control device according to claim 7.

9. A method for controlling a vehicle including a rotating electric machine for driving the vehicle, an electric storage device that exchanges electric power between the rotating electric machine and the electric storage device, the method comprising the steps of: The computer putting the vehicle into a sleep state after charging of the power storage device by an external power source is completed, and then waking up the vehicle periodically; acquiring a temperature of the power storage device after charging of the power storage device is completed; controlling an operation of the cooling device based on a comparison result between the acquired temperature and a threshold temperature set as a condition for starting the cooling device after charging of the power storage device is completed; the threshold temperature is lower than a charging threshold temperature set as a condition for starting the cooling device while the power storage device is being charged; Control methods.

10. Furthermore, an external temperature of the vehicle is acquired; Calculating the threshold temperature based on the acquired external temperature of the vehicle. The control method according to claim 9.

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