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US-20260124959-A1 - VEHICLE

US20260124959A1US 20260124959 A1US20260124959 A1US 20260124959A1US-20260124959-A1

Abstract

A vehicle that can be charged by connecting to an external charging device includes a navigation system in which a destination of the vehicle is set, a battery that stores electric power that is supplied from the external charging device, a cooling device that cools the battery, and an electronic control unit (ECU) that controls the cooling device. When the external charging device is set as the destination in the navigation system, the ECU acquires a maximum current of the external charging device from the navigation system, calculates a prediction value regarding what the SOC of the battery will be when the vehicle reaches the destination, based on navigation information from the navigation system, and when the maximum current exceeds a current threshold value and also the predicted value is equal to or less than a first SOC threshold value, operates the cooling device before the vehicle reaches the destination.

Inventors

  • Masashi Kobayashi

Assignees

  • TOYOTA JIDOSHA KABUSHIKI KAISHA

Dates

Publication Date
20260507
Application Date
20250725
Priority Date
20241106

Claims (5)

  1. 1 . A vehicle that is chargeable by connection to an external charging device, the vehicle comprising: a navigation system in which a destination of the vehicle is set; a power storage device that stores electric power that is supplied from the external charging device; a cooling device that cools the power storage device; and a control device that controls the cooling device, wherein when the external charging device is set as the destination in the navigation system, the control device acquires a maximum current of the external charging device from the navigation system, calculates a prediction value of what a state of charge (SOC) of the power storage device will be when the vehicle reaches the destination, based on navigation information from the navigation system, and when the maximum current exceeds a current threshold value and also the prediction value is equal to or less than a first SOC threshold value, operates the cooling device before the vehicle reaches the destination.
  2. 2 . The vehicle according to claim 1 , wherein, when the maximum current does not exceed the current threshold value, the control device does not operate the cooling device before the vehicle reaches the destination.
  3. 3 . The vehicle according to claim 2 , further comprising a temperature sensor that detects a temperature of the power storage device, wherein, in a case in which the external charging device is set as the destination in the navigation system, when the maximum current exceeds the current threshold value and also the prediction value is equal to or less than the first SOC threshold value, the control device sets a first cooling start temperature such that the higher the maximum current is and also the lower the prediction value is, the lower the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature reaching the first cooling start temperature.
  4. 4 . The vehicle according to claim 3 , wherein, when the external charging device is set as the destination in the navigation system, and also the maximum current exceeds the current threshold value, the control device sets the first cooling start temperature such that, when the prediction value is equal to or lower than the first SOC threshold value, the greater the maximum current is and also the lower the predicted value is, the lower the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature reaching the first cooling start temperature, sets a second cooling start temperature such that, when the prediction value exceeds the first SOC threshold value but is equal to or lower than a second SOC threshold value that is higher than the first SOC threshold value, the greater the maximum current is and also the lower the prediction value is, the lower the second cooling start temperature that is higher than the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature reaching the second cooling start temperature, and recalculates the prediction value when the prediction value exceeds the second SOC threshold value, and the prediction value that is recalculated is compared with the first SOC threshold value or the second SOC threshold value to determine whether operation of the cooling device is necessary.
  5. 5 . The vehicle according to claim 4 , wherein the control device sets each of the first cooling start temperature and the second cooling start temperature based on a life requirement of the power storage device.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Japanese Patent Application No. 2024-194221 filed on Nov. 6, 2024. The disclosure of the above-identified application, including the specification, drawings, and claims, is incorporated by reference herein in its entirety. BACKGROUND 1. Technical Field The present disclosure relates to a vehicle. 2. Description of Related Art Japanese Unexamined Patent Application Publication No. 2010-166676 (JP 2010-166676 A) discloses a battery electric vehicle that cools a battery (power storage device) when a vehicle is near a destination, thereby suppressing temperature of the battery from becoming high when the battery is charged at the destination. SUMMARY Generally, when a vehicle is connected to an external charging device to charge a power storage device that is installed in the vehicle, charging current is limited when temperature of the power storage device becomes high, in order to suppress deterioration of the power storage device. When the charging current is limited, charging time will become prolonged. Accordingly, cooling the power storage device when the vehicle nears the destination may enable the charging time to be shortened. However, when the temperature of the power storage device is not expected to become hot when the power storage device is being charged, cooling the power storage device may result in the temperature of the power storage device becoming lower than a temperature that is suitable for charging, which may actually lengthen the charging time. An object of the present disclosure is to shorten the charging time of a power storage device. (1) A vehicle according to an aspect of the present disclosure is configured to be chargeable by connecting to an external charging device. The vehicle includes a navigation system in which a destination of the vehicle is set, a power storage device that stores electric power that is supplied from the external charging device, a cooling device that cools the power storage device, and a control device that controls the cooling device. When the external charging device is set as the destination in the navigation system, the control device acquires a maximum current of the external charging device from the navigation system, calculates a prediction value of what a state of charge (SOC) of the power storage device will be when the vehicle reaches the destination, based on navigation information from the navigation system, and when the maximum current exceeds a current threshold value and also the prediction value is equal to or less than a first SOC threshold value, operates the cooling device before the vehicle reaches the destination. (2) In the vehicle according to (1), when the maximum current does not exceed the current threshold value, the control device does not operate the cooling device before the vehicle reaches the destination. (3) The vehicle according to (2) further includes a temperature sensor that detects a temperature of the power storage device. In a case in which the external charging device is set as the destination in the navigation system, when the maximum current exceeds the current threshold value and also the prediction value is equal to or less than the first SOC threshold value, the control device sets a first cooling start temperature such that the higher the maximum current is and also the lower the prediction value is, the lower the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature of the power storage device reaching the first cooling start temperature. (4) In the vehicle according to (3), when the external charging device is set as the destination in the navigation system, and also the maximum current exceeds the current threshold value, the control device sets the first cooling start temperature such that, when the prediction value is equal to or lower than the first SOC threshold value, the greater the maximum current is and also the lower the predicted value is, the lower the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature reaching the first cooling start temperature, sets a second cooling start temperature such that, when the prediction value exceeds the first SOC threshold value but is equal to or lower than a second SOC threshold value that is higher than the first SOC threshold value, the greater the maximum current is and also the lower the prediction value is, the lower the second cooling start temperature that is higher than the first cooling start temperature is set to be, and operates the cooling device in accordance with the temperature reaching the second cooling start temperature, and recalculates the prediction value when the prediction value exceeds the second SOC threshold value, and the prediction value that is recalculated is compared with the first SOC threshold value or the second SOC threshold value to det