Vehicle

Abstract

To prevent the input power of a power storage device from exceeding an allowable input power during external charging.SOLUTION: A vehicle includes: a power storage device; a cooling device that cools the power storage device by driving an electric compressor connected to a power line together with the power storage device; and a control device that transmits requested power to an external power supply device during external charging of charging the power storage device via the power line using power from the external power supply device outside the vehicle. During operation of the cooling device during the external charging, the control device transmits, to the external power supply device, requested power that is lower by a margin than the sum of the allowable input power of the power storage device and the power consumption of the electric compressor.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a vehicle.

Background Art

[0002] Conventionally, as this type of vehicle, there has been proposed one including a power storage device, a duct that blows warm air toward the power storage device, and a control device that warms the power storage device by allowing warm air to flow around the power storage device through the duct based on the temperature of the power storage device (see, for example, Patent Document 1). In this vehicle, it has an evaporator of a cooling unit that dehumidifies the warm air flowing around the power storage device, and when the control device determines that condensation has occurred in the power storage device, the control device dehumidifies the warm air flowing around the power storage device with the evaporator of the air conditioner. Further, in this vehicle, when the control device charges the power storage device by supplying power from a charger outside the vehicle to the power storage device, when dehumidifying the periphery of the power storage device with the evaporator of the air conditioner, the control device causes the charger to supply the power consumption of the electric compressor included in the air conditioner.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a vehicle, during external charging in which the power storage device is charged by supplying power from a charger outside the vehicle to the power storage device, in order to charge the power storage device with sufficiently large power, there may be a case where the power of the sum of the allowable input power of the power storage device and the power consumption of the electric compressor is transmitted to the charger as the required power. In this case, when the power consumption of the electric compressor decreases, due to the response delay of the charger, the actual power from the charger becomes larger than the required power, the input power of the power storage device increases, and there is a possibility that the input power exceeds the allowable input power.

[0005] The vehicle of the present disclosure mainly aims to suppress the input power of the power storage device from exceeding the allowable input power during external charging.

Means for Solving the Problem

[0006] The vehicle of the present disclosure has adopted the following means to achieve the above main object.

[0007] The vehicle of the present disclosure includes a power storage device, a cooling device that cools the power storage device along with driving an electric compressor connected to a power line, and a control device that transmits a required power to the external power supply device when charging the power storage device via the power line using power from an external power supply device outside the vehicle. The vehicle is wherein, during operation of the cooling device during the external charging, the control device transmits, as the required power, power that is lower by a margin than the sum of the allowable input power of the power storage device and the power consumption of the electric compressor to the external power supply device. This is the gist.

[0008] In the vehicle of the present disclosure, during operation of the cooling device during external charging, power that is lower by a margin than the sum of the allowable input power of the power storage device and the power consumption of the electric compressor is transmitted as the required power to the external power supply device. Thereby, compared with the case where power equal to the sum of the allowable input power of the power storage device and the power consumption of the electric compressor is transmitted as the required power to the external power supply device, even when the power consumption of the electric compressor decreases and the actual power from the external power supply device increases with respect to the required power due to the response delay of the external power supply device and the input power of the power storage device increases, it is possible to suppress the input power of the power storage device from exceeding the allowable input power.

[0009] In the vehicle of the present disclosure, the margin may be set to increase as the response delay time of the external power supply device becomes longer. By doing so, when the power consumption of the electric compressor decreases, it is possible to more appropriately suppress the input power of the power storage device from exceeding the allowable input power.

[0010] In the vehicle of the present disclosure, when the stop condition of the electric compressor is satisfied during the operation of the cooling device during external charging, the control device may change the required power to the allowable input power and then stop the electric compressor after the response delay time of the external power supply device has elapsed. By doing so, even if the input power of the power storage device increases with the stop of the electric compressor, it is possible to suppress the input power of the power storage device from exceeding the allowable input power.

[0011] In the vehicle of the present disclosure, when the predicted decrease amount of the power consumption of the electric compressor reaches a threshold value or more during the operation of the cooling device during external charging, the control device may decrease the required power by the predicted decrease amount and then decrease the power consumption of the electric compressor by the predicted decrease amount after the response delay time of the external power supply device has elapsed. By doing so, even if the input power of the power storage device increases relatively largely with a relatively large decrease in the power consumption of the electric compressor, it is possible to suppress the input power of the power storage device from exceeding the allowable input power.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0013] Embodiments for implementing the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an electric vehicle 20 and a charging stand 80 as an external power supply device according to an embodiment of the present disclosure. FIG. 2 is a schematic configuration diagram of a cooling device 40 provided in the electric vehicle 20. As shown in FIG. 1, the electric vehicle 20 according to the embodiment includes a motor 32, an inverter 34, a high-voltage battery 36 as a power storage device, a cooling device 40, a low-voltage battery 60, a DC / DC converter 62, a connector 66, and a vehicle electronic control unit (hereinafter referred to as “vehicle ECU”) 70.

[0014] The motor 32 is configured as, for example, a synchronous generator motor, and the rotor of the motor 32 is connected to a drive shaft 26 that is connected to drive wheels 22a and 22b via a differential gear 24. The inverter 34 is configured as an inverter circuit having a plurality of switching elements, and is connected to the high-voltage battery 36 via a high-voltage power line 38. The motor 32 is rotationally driven by switching control of the plurality of switching elements of the inverter 34 by the vehicle ECU 70.

[0015] The high-voltage battery 36 is configured as, for example, a lithium-ion secondary battery or a nickel-metal hydride secondary battery having a rated voltage of about several hundred V, and is connected to the high-voltage power line 38 as described above.

[0016] The cooling device 40 is configured as a device for cooling the high-voltage battery 36. As shown in FIG. 2, the cooling device 40 includes a first heat circuit 41 and a second heat circuit 51. The first heat circuit 41 has a flow path 42, an electric pump 43, and a chiller 45. The flow path 42 is a flow path for circulating a heat exchange medium (cooling water) through the battery flow path of the high-voltage battery 36, the electric pump 43, and the chiller 45. The electric pump 43 is connected to a low-voltage power line 64 (see FIG. 1) and pumps the heat exchange medium in the flow path 42. Details of the chiller 45 will be described later.

[0017] The second heat circuit 51 includes an electric compressor (compressor) 52, a condenser 53, an expansion valve 54, an evaporator 55, an expansion valve 56, and a chiller 45. The electric compressor 52 is connected to the high-voltage power line 38 (see FIG. 1), and compresses the refrigerant from the evaporator 55 and the chiller 45 into a high-temperature and high-pressure gaseous refrigerant. The condenser 53 turns the refrigerant from the electric compressor 52 into a normal-temperature and high-pressure liquid refrigerant through heat exchange with air. The expansion valve 54 reduces the pressure of the refrigerant from the condenser 53 to a low-temperature and low-pressure gas-liquid mixed refrigerant. The evaporator 55 turns the refrigerant from the expansion valve 54 into a low-temperature and low-pressure gaseous refrigerant through heat exchange with air. Therefore, the electric compressor 52, the condenser 53, the expansion valve 54, and the evaporator 55 function as a refrigeration cycle. The expansion valve 56 reduces the pressure of the refrigerant from the condenser 53 to a low-temperature and low-pressure gas-liquid mixed refrigerant. The chiller 45 performs heat exchange between the refrigerant from the expansion valve 56 and the heat exchange medium in the flow path 42 of the first heat circuit 41. As a result, when the second heat circuit 51 is operating, the heat exchange medium in the flow path 42 of the first heat circuit 41 is cooled. Then, the high-voltage battery 36 is cooled by the heat exchange medium in the flow path 42.

[0018] As shown in FIG. 1, the low-voltage battery 60 is configured as, for example, a lead-acid battery with a rated voltage of 12V and is connected to the low-voltage power line 64. The DC / DC converter 62 is connected to the high-voltage power line 38 and the low-voltage power line 64, and steps down the power of the high-voltage power line 38 and supplies it to the low-voltage power line 64.

[0019] The connector 66 is connected to the high-voltage power line 38 and is configured to be connectable to the connector 84 of the charging stand 80. Therefore, when the connector 84 and the connector 66 are connected, the electric vehicle 20 can charge the high-voltage battery 36 using the power of the charging stand 80.

[0020] The vehicle ECU 70 includes a microcomputer having a CPU, a ROM, a RAM, a flash memory, input / output ports, and communication ports. The vehicle ECU 70 inputs signals from various sensors via the input ports. For example, the vehicle ECU 70 inputs the rotational position θm of the rotor of the motor 32 from a rotational position sensor and the phase currents Iu, Iv, Iw of each phase of the motor 32 from a current sensor. The vehicle ECU 70 also inputs the voltage Vbh of the high-voltage battery 36 from a voltage sensor, the input / output current Ibh to the high-voltage battery 36 from a current sensor, and the temperature Tbh of the high-voltage battery 36 from a temperature sensor. The vehicle ECU 70 also inputs the voltage Vbl of the low-voltage battery 60 from a voltage sensor. The vehicle ECU 70 also inputs the power consumption Pc of the electric compressor 52 of the cooling device 40 from a power sensor. The vehicle ECU 70 also inputs a start signal from a start switch, a shift position SP which is the operation position of the shift lever from a shift position sensor, an accelerator pedal position AP which is the depression amount of the accelerator pedal from an accelerator pedal position sensor, a brake pedal position BP which is the depression amount of the brake pedal from a brake pedal position sensor, and a vehicle speed V from a vehicle speed sensor.

[0021] The vehicle ECU 70 outputs various control signals via the output ports. For example, the vehicle ECU 70 outputs a control signal to the inverter 34, a control signal to the cooling device 40 (electric pump 43, electric compressor 52), and a control signal to the DC / DC converter 62.

[0022] The vehicle ECU 70 performs various calculations. For example, the vehicle ECU 70 calculates the electrical angle θe and the rotational speed Nm of the motor 32 based on the rotational position θm of the rotor of the motor 32. The vehicle ECU 70 also calculates the state of charge SOC of the high-voltage battery 36 based on the integrated value of the current Ibh of the high-voltage battery 36. The vehicle ECU 70 also calculates the input limit Win, which is the allowable input power of the high-voltage battery 36, based on the state of charge SOC and the temperature Tbh of the high-voltage battery 36. The vehicle ECU 70 also calculates the input / output power Pb of the high-voltage battery 36 based on the voltage Vbh and the input / output current Ibh of the high-voltage battery 36. The vehicle ECU 70 can communicate with the stand electronic control unit (hereinafter referred to as the "stand ECU") of the charging stand 80 by wire or wirelessly.

[0023] The charging stand 80 is provided at home, a charging station, or the like. The charging stand 80 includes a power supply device 82, a connector 84, and a stand ECU 88. The power supply device 82 is connected to the connector 84 via a power line 86. The power supply device 82 is configured to convert AC power from the power grid into DC power and adjust the output power (output voltage and output current) for output. The connector 84 is configured to be connectable to the connector 66 of the electric vehicle 20. When the connector 84 and the connector 66 are connected, the power line 86 and the high-voltage system power line 38 are connected.

[0024] The stand ECU 88 includes a microcomputer having a CPU, a ROM, a RAM, a flash memory, an input / output port, and a communication port. The stand ECU 88 inputs the output voltage Vs of the power supply device 82 from a voltage sensor and the output current Is of the power supply device 82 from a current sensor. The stand ECU 88 outputs various control signals via the output port. For example, the stand ECU 88 outputs a control signal to the power supply device 82. The stand ECU 88 calculates the output power Ps based on the output voltage Vs and the output current Is of the power supply device 82. As described above, the stand ECU 88 can communicate with the vehicle ECU 50 of the electric vehicle 20 by wire or wirelessly.

[0025] Next, the operation of the electric vehicle 20 of the embodiment will be described. In particular, the operation during external charging for charging the high-voltage battery 36 using the power of the charging stand 80 will be described. FIG. 3 is a flowchart showing an example of a processing routine executed by the vehicle ECU 70. This routine is executed when the connector 66 of the electric vehicle 20 and the connector 84 of the charging stand 80 are connected by the user and the start condition for external charging is satisfied. As the start condition for external charging, for example, a condition such as the charging start button provided on the charging stand 80 being pressed by the user is used. In the following description, the input / output power Pb and the input limit Win of the high-voltage battery 36 are set with the input side to the high-voltage battery 36 being a positive value.

[0026] When the processing routine in FIG. 3 is executed, the vehicle ECU 70 sets the input limit Win of the high-voltage battery 36 to the required power Ps*, and transmits the set required power Ps* to the stand ECU 88 of the charging stand 80 (step S100). When the stand ECU 88 receives the required power Ps*, it controls the power supply device 82 by power feedback control so that the difference between the output power Ps of the power supply device 82 and the required power Ps* is canceled. Thereby, the high-voltage battery 36 is charged with the power supplied from the charging stand 80 to the electric vehicle 20.

[0027] Subsequently, it is determined whether or not the end condition for external charging is satisfied (step S110). As the end condition for external charging, for example, a condition such as the state of charge SOC of the high-voltage battery 36 reaching a threshold Sref near the full charge rate is used. In the embodiment, when the end condition for external charging is satisfied during the operation of the cooling device 40, it is determined that the operation stop condition of the cooling device 40 is also satisfied.

[0028] When it is determined in step S110 that the external charging end condition is not satisfied, it is determined whether the cooling device 40 is operating (step S120). When it is determined that the cooling device 40 is not operating, i.e., it is stopped, it is determined whether the operating start condition of the cooling device 40 is satisfied (step S130). As the operating start condition of the cooling device 40, for example, a condition that the temperature Tbh of the high-voltage battery 36 is equal to or higher than a threshold value Tbref1 is used. When it is determined that the operating start condition of the cooling device 40 is not satisfied, the process returns to step S100. In this case, the input limit Win of the high-voltage battery 36 is continuously set to the required power Ps*.

[0029] When it is determined in step S130 that the operating start condition of the cooling device 40 is satisfied, the operation of the cooling device 40 is started (step S140). In the operation of the cooling device 40, in the embodiment, the higher the temperature Tbh of the high-voltage battery 36, the higher the rotational speeds of the electric compressor 52 and the electric pump 43 (the cooling performance of the cooling device 40 becomes higher), and the electric compressor 52 and the electric pump 43 are controlled accordingly. Therefore, the higher the temperature Tbh of the high-voltage battery 36, the greater the power consumption Pc of the electric compressor 52.

[0030] When the operation of the cooling device 40 is started in this way, the required power Ps* is set to the power (Win + Pc - α) obtained by subtracting the margin α from the sum of the input limit Win of the high-voltage battery 36 and the power consumption Pc of the electric compressor 52, and the set required power Ps* is transmitted to the stand ECU88 of the charging stand 80 (step S150), and the process returns to step S110. The reason for setting the required power Ps* to the power (Win + Pc - α) instead of the power (Win + Pc) which is the sum of the input limit Win of the high-voltage battery 36 and the power consumption Pc of the electric compressor 52, and the details of the margin α will be described later.

[0031] When it is determined in step S120 that the cooling device 40 is in operation, it is determined whether or not the operating stop condition of the cooling device 40 is satisfied (step S160). As the operating stop condition of the cooling device 40, for example, a condition that the temperature Tbh of the high-voltage battery 36 is less than the threshold value Tbref2 and equal to or greater than the threshold value Tbref1 is used. When it is determined that the operating stop condition of the cooling device 40 is not satisfied, the operation of the cooling device 40 is continued, and the process proceeds to the process of step S150. In this case, the power (Win + Pc - α) is continuously set to the required power Ps*.

[0032] Explain the reason for setting the power (Win + Pc - α) instead of the power (Win + Pc) to the required power Ps* during the operation of the cooling device 40 during external charging, and the details of the margin α. When the power consumption Pc of the electric compressor 52 decreases during the operation of the cooling device 40 during external charging, the required power Ps* transmitted from the vehicle ECU 70 to the stand ECU 88 decreases, and the output power Ps of the power supply device 82 decreases. At this time, the output power Ps of the power supply device 82 decreases with a delay with respect to the power consumption Pc of the electric compressor 52 due to the response delay of the charging stand 80. The response delay of the charging stand 80 is based on the communication delay between the vehicle ECU 70 and the stand ECU 88, the control delay of the power supply device 82 by the stand ECU 88, and the like. Due to such a response delay of the charging stand 80, when the power consumption Pc of the electric compressor 52 decreases, the output power Ps of the power supply device 82 becomes larger than the required power Ps*, and the input / output power Pb of the high-voltage battery 36 can increase. For this reason, if the power (Win + Pc) is set to the required power Ps* and transmitted to the stand ECU 88 during the operation of the cooling device 40 during external charging, when the power consumption Pc of the electric compressor 52 decreases, the input / output power Pb of the high-voltage battery 36 may exceed the input limit Win. On the other hand, in the embodiment, during the operation of the cooling device 40 during external charging, the power (Win + Pc - α) is set to the required power Ps* and transmitted to the stand ECU 88. Thereby, compared with the case where the power (Win + Pc) is set to the required power Ps* and transmitted to the stand ECU 88, even if the input / output power Pb of the high-voltage battery 36 increases when the power consumption Pc of the electric compressor 52 decreases, it is possible to suppress the input / output power Pb from exceeding the input limit Win. The margin α is determined based on the response delay of the charging stand 80. For example, the vehicle ECU 70 may receive the response delay time Td (specification value) of the charging stand 80 from the stand ECU 88 and set the margin α based on it.Also, a test power command Pt*, such as a rectangular wave, a sawtooth wave, or a triangular wave, is transmitted from the vehicle ECU 70 to the stand ECU 88, the input / output power Pb of the high-voltage battery 36 is detected, or the output power Ps of the power supply device 82 is received. The response delay time Td of the charging stand 80 is calculated based on the test power command Pt* and the input / output power Pb or the output power Ps, and the margin α may be set based on the calculated response delay time Td. In the embodiment, the margin α is set such that it increases as the response delay time Td of the charging stand 80 becomes longer. This is because when the power consumption Pc of the electric compressor 52 decreases, the deviation between the required power Ps* and the output power Ps of the power supply device 82 tends to increase, and the input / output power Pb of the high-voltage battery 36 tends to increase significantly. By setting the margin α in this way, when the power consumption Pc of the electric compressor 52 decreases, it is possible to more appropriately suppress the input / output power Pb of the high-voltage battery 36 from exceeding the input limit Win.

[0033] When it is determined in step S160 that the operating stop condition of the cooling device 40 is satisfied, the input limit Win of the high-voltage battery 36 is set, and the set required power Ps* is transmitted to the stand ECU 88 of the charging stand 80 as the required power Ps* (step S170). Then, after the response delay time Td of the charging stand 80 has elapsed (step S180), the cooling device 40 (electric compressor 52) is stopped (step S190), and the process returns to step S110. When stopping the cooling device 40 (electric compressor 52), that is, when the power consumption Pc of the electric compressor 52 becomes 0, due to the response delay of the charging stand 80 described above, the input / output power Pb of the high-voltage battery 36 may increase relatively significantly. Taking this into account, in the embodiment, after changing the required power Ps* from the power (Win + Pc - α) to the input limit Win and after the response delay time Td of the charging stand 80 has elapsed, the cooling device 40 (electric compressor 52) is stopped. Thereby, even if the input / output power Pb of the high-voltage battery 36 increases with the stop of the electric compressor 52, it is possible to suppress the input / output power Pb from exceeding the input limit Win.

[0034] When it is determined in step S110 that the external charging end condition is satisfied, it is determined whether or not the cooling device 40 is operating (step S200). When it is determined that the cooling device 40 is not operating, i.e., stopped, the required power Ps* is set to the value 0, and the set required power Ps* is transmitted to the stand ECU 88 of the charging stand 80 (step S210), and this routine ends. When the stand ECU 88 receives the required power Ps* with the value 0, it stops the power supply device 82.

[0035] When it is determined in step S200 that the cooling device 40 is operating, the required power Ps* is set to the value 0, and the set required power Ps* is transmitted to the stand ECU 88 of the charging stand 80 (step S210). After the response delay time Td of the charging stand 80 has elapsed (step S220), the cooling device 40 is stopped (step S230), and this routine ends.

[0036] FIGS. 4 and 5 are explanatory diagrams showing an example of the state during external charging. In FIGS. 4 and 5, as each power, the input limit Win and the input / output power Pb of the high-voltage battery 36, the power consumption Pc of the electric compressor 52, the required power Ps* transmitted from the electric vehicle 20 to the charging stand 80, and the output power Ps of the charging stand 80 (power supply device 82) are illustrated. In FIGS. 4 and 5, the upper part shows the state of the embodiment, and the lower part shows the state of the comparative example. The comparative example in FIG. 4 is different from the embodiment in which the power (Win + Pc - α) is set as the required power Ps* in that the power (Win + Pc) is set as the required power Ps*. The comparative example in FIG. 5 is different from the embodiment in which the cooling device 40 (electric compressor 52) is stopped and the required power Ps* is decreased when the operating stop condition of the cooling device 40 is satisfied, and the cooling device 40 is stopped after the response delay time Td of the charging stand 80 has elapsed after the required power Ps* is changed to the input limit Win.

[0037] As shown in FIG. 4, in the embodiments and the comparative examples, when the required power Ps* decreases as the power consumption Pc of the electric compressor 52 decreases from time t11, the output power Ps of the charging stand 80 decreases with a response delay time Td with respect to the required power Ps*. In the comparative example, by setting the power (Win + Pc) as the required power Ps*, the input / output power Pb of the high-voltage battery 36 increases and exceeds the input limit Win. On the other hand, in the embodiment, by setting the power (Win + Pc - α) as the required power Ps*, even if the input / output power Pb of the high-voltage battery 36 increases, it is possible to suppress the input / output power Pb from exceeding the input limit Win.

[0038] As shown in FIG. 5, in the comparative example, when the operating stop condition of the cooling device 40 is satisfied at time t21, the cooling device 40 (electric compressor 52) is stopped, that is, the power consumption Pc of the electric compressor 52 becomes zero and the required power Ps* is decreased, so that the input / output power Pb of the high-voltage battery 36 increases and exceeds the input limit Win. On the other hand, in the embodiment, when the operating stop condition of the cooling device 40 is satisfied at time t21, after the required power Ps* is decreased and the response delay time Td of the charging stand 80 has elapsed, by stopping the cooling device 40, it is possible to suppress the input / output power Pb of the high-voltage battery 36 from exceeding the input limit Win.

[0039] In the electric vehicle 20 of the present embodiment described above, during the operation of the cooling device 40 (electric compressor 52) during external charging, the power (Win + Pc - α) obtained by subtracting the margin α from the sum of the input limit Win of the high-voltage battery 36 and the power consumption Pc of the electric compressor 52 is set as the required power Ps* and transmitted to the stand ECU 88 of the charging stand 80. Thereby, compared with the case where the power (Win + Pc) which is the sum of the input limit Win of the high-voltage battery 36 and the power consumption Pc of the electric compressor 52 is set as the required power Ps* and transmitted to the stand ECU 88, even if the input / output power Pb of the high-voltage battery 36 increases when the power consumption Pc of the electric compressor 52 decreases, it is possible to suppress the input / output power Pb from exceeding the input limit Win.

[0040] Also, in the electric vehicle 20, when the operation stop condition of the cooling device 40 (electric compressor 52) is satisfied during the operation of the cooling device 40 at the time of external charging, after changing the required power Ps* from the power (Win + Pc - α) to the input limit Win and after the response delay time Td of the charging stand 80 has elapsed, the cooling device 40 is stopped. Thereby, even if the input / output power Pb of the high-voltage battery 36 increases with the stop of the electric compressor 52, it is possible to suppress the input / output power Pb from exceeding the input limit Win.

[0041] In the above-described embodiment, the vehicle ECU 70 is configured to set the margin α such that it increases as the response delay time Td of the charging stand 80 becomes longer, but the present invention is not limited thereto. For example, the vehicle ECU 70 may set the margin α by upper-limiting a temporary margin αtmp that increases as the response delay time Td of the charging stand 80 becomes longer with the power consumption Pc of the electric compressor 52. Further, the margin α may be a value determined in advance based on the standard value (general value) of the response delay time Td of the charging stand 80.

[0042] In the above-described embodiment, when the operating stop condition of the cooling device 40 (electric compressor 52) is satisfied during the operation of the cooling device 40 during external charging, the vehicle ECU 70 changes the required power Ps* from the power (Win + Pc - α) to the input limit Win, and then stops the cooling device 40 after the response delay time Td of the charging stand 80 has elapsed. However, in addition to or instead of this, when the predicted decrease amount ΔPces of the power consumption Pc of the electric compressor 52 reaches a threshold value Pcref or more during the operation of the cooling device 40 during external charging, the required power Ps* is decreased by the predicted decrease amount ΔPces, and then after the response delay time Td of the charging stand 80 has elapsed, the power consumption Pc of the electric compressor 52 may be decreased by the predicted decrease amount ΔPces. By doing so, even if the input / output power Pb of the high-voltage battery 36 increases relatively greatly with a relatively large decrease in the power consumption Pc of the electric compressor 52, it is possible to suppress the input / output power Pb from exceeding the input limit Win. The predicted decrease amount ΔPces of the power consumption Pc of the electric compressor 52 can be calculated based on the transition of the temperature Tbh of the high-voltage battery 36, the transition of the cooling performance of the cooling device 40 (for example, the transition of the rotational speed of the electric compressor 52 or the electric pump 43), and the like.

[0043] In the above-described embodiment, the cooling device 40 is provided with the first heat circuit 41 having the flow path 42, the electric pump 43, and the chiller 45, and the second heat circuit 51 having the electric compressor 52, the capacitor 53, the expansion valve 54, the evaporator 55, the expansion valve 56, and the chiller 45, but is not limited thereto. For example, the flow path 42, the electric pump 43, the chiller 45, and the expansion valve 56 may not be provided. In this case, the air cooled by the heat exchange between the evaporator 55 and the air may be blown to the high-voltage battery 36.

[0044] In the above-described embodiment, the electric vehicle 20 is configured to include the motor 32, the inverter 34, the high-voltage battery 36, and the cooling device 40, but the present invention is not limited thereto. For example, in addition to the configuration similar to that of the electric vehicle 20, a hybrid vehicle configuration further including an engine may be adopted. Alternatively, in addition to the configuration similar to that of the electric vehicle 20, a fuel cell vehicle configuration further including a fuel cell may be adopted.

[0045] The correspondence between the main elements of the embodiment and the main elements of the invention described in the section of means for solving the problems will be described. In the embodiment, the high-voltage battery 36 corresponds to the "power storage device", the cooling device 40 having the electric compressor 52 corresponds to the "cooling device", and the vehicle ECU 70 corresponds to the "control device".

[0046] It should be noted that the correspondence between the main elements of the embodiment and the main elements of the invention described in the section of means for solving the problems is an example for specifically explaining the form for implementing the invention described in the section of means for solving the problems in the embodiment. Therefore, it does not limit the elements of the invention described in the section of means for solving the problems. That is, the interpretation of the invention described in the section of means for solving the problems should be made based on the description in that section, and the embodiment is merely a specific example of the invention described in the section of means for solving the problems.

[0047] As described above, the embodiments for implementing the present disclosure have been described using the embodiments. However, the present disclosure is not limited to such embodiments, and it goes without saying that the present disclosure can be implemented in various forms without departing from the gist of the present disclosure.

Industrial Applicability

[0048] The present disclosure can be applied to the vehicle manufacturing industry and the like.

Explanation of Reference Numerals

[0049] 20 Electric vehicle, 22a Drive wheel, 24 Differential gear, 26 Drive shaft, 32 Motor, 34 Inverter, 36 High-voltage battery, 38 High-voltage system power line, 40 Cooling device, 41 First heat circuit, 42 Flow path, 43 Electric pump, 45 Chiller, 50 Vehicle ECU, 51 Second heat circuit, 52 Electric compressor, 53 Capacitor, 54 Expansion valve, 55 Evaporator, 56 Expansion valve, 60 Low-voltage battery, 62 DC / DC converter, 64 Low-voltage system power line, 66 Connector, 70 Vehicle ECU, 80 Charging stand, 82 Power supply device, 84 Connector, 86 Power line, 88 Stand ECU.

Claims

1. A vehicle comprising: a power storage device; a cooling device that cools the power storage device in association with driving of an electric compressor connected to a power line together with the power storage device; and a control device that transmits required power to an external power supply device when charging the power storage device via the power line using power from the external power supply device outside the vehicle, wherein the control device transmits, as the required power, power that is lower by a margin than the sum of the allowable input power of the power storage device and the power consumption of the electric compressor to the external power supply device during operation of the cooling device during the external charging. Vehicle.

2. The vehicle according to Claim 1, wherein the margin is set to increase as the response delay time of the external power supply device becomes longer. Vehicle.

3. The vehicle according to Claim 1 or 2, wherein when the stop condition of the electric compressor is satisfied during operation of the cooling device during the external charging, the control device changes the required power to the allowable input power and then stops the electric compressor after the response delay time of the external power supply device has elapsed. Vehicle.

4. The vehicle according to Claim 1 or 2, wherein when the predicted decrease amount of the power consumption of the electric compressor reaches a threshold value or more during operation of the cooling device during the external charging, the control device decreases the required power by the predicted decrease amount and then decreases the power consumption of the electric compressor by the predicted decrease amount after the response delay time of the external power supply device has elapsed. Vehicle.

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