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KR-20260067971-A - VEHICLE

KR20260067971AKR 20260067971 AKR20260067971 AKR 20260067971AKR-20260067971-A

Abstract

A vehicle capable of charging by connecting to an external charging device is equipped with a navigation system in which the vehicle's destination is set, a battery that accumulates power supplied from the external charging device, a cooling device that cools the battery, and an ECU that controls the cooling device. When the external charging device is set as the destination in the navigation system, the ECU obtains the maximum current of the external charging device from the navigation system and, based on navigator information from the navigation system, calculates a predicted value as the battery SOC when the vehicle reaches the destination. When the maximum current exceeds a current threshold and the predicted value is below a first SOC threshold, the cooling device is operated until the vehicle reaches the destination.

Inventors

  • 고바야시 마사시

Assignees

  • 도요타지도샤가부시키가이샤

Dates

Publication Date
20260513
Application Date
20250812
Priority Date
20241106

Claims (5)

  1. It is a vehicle that can be charged by connecting to an external charging device, A navigation system in which the destination of the above vehicle is set, and A storage device that accumulates power supplied from the above external charging device, and A cooling device for cooling the above-mentioned capacitor, and, A control device for controlling the above-mentioned cooling device is provided, and When the external charging device is set as the destination in the above navigation system, the control device, The maximum current of the external charging device is obtained from the above navigation system, and Based on navigator information from the above navigation system, a predicted value is calculated as the State of Charge (SOC) of the battery when the vehicle reaches the destination, and A vehicle that operates the cooling device until the vehicle reaches the destination when the above maximum current exceeds the current threshold and the above predicted value is below the first SOC threshold.
  2. In paragraph 1, A vehicle in which the above control device does not operate the cooling device until the vehicle reaches the destination when the maximum current does not exceed the current threshold.
  3. In paragraph 2, The above vehicle further comprises a temperature sensor for detecting the temperature of the battery storage device, and When the external charging device is set as the destination in the navigation system, and the maximum current exceeds the current threshold and the predicted value is below the first SOC threshold, the control device, The first cooling start temperature is set such that the greater the maximum current and the lower the predicted value, the lower the first cooling start temperature is. A vehicle that operates the cooling device as the above temperature reaches the above first cooling start temperature.
  4. In paragraph 3, In the case where the external charging device is set as the destination in the navigation system and the maximum current exceeds the current threshold, the control device, When the above predicted value is below the above first SOC threshold, the first cooling start temperature is set such that the first cooling start temperature is lowered as the maximum current increases and the above predicted value decreases, and as the temperature reaches the first cooling start temperature, the cooling device is operated. When the above predicted value exceeds the first SOC threshold but is lower than the second SOC threshold which is higher than the first SOC threshold, the second cooling start temperature is set such that the second cooling start temperature which is higher than the first cooling start temperature is lowered as the maximum current increases and the predicted value decreases, and as the temperature reaches the second cooling start temperature, the cooling device is operated. A vehicle that, when the above-mentioned predicted value exceeds the above-mentioned second SOC threshold, recalculates the above-mentioned predicted value and determines whether the cooling device needs to be operated by comparing the recalculated above-mentioned predicted value with the above-mentioned first SOC threshold or the above-mentioned second SOC threshold.
  5. In paragraph 4, A vehicle, wherein the control device sets each of the first cooling start temperature and the second cooling start temperature based on the life requirements of the capacitor.

Description

Vehicle The present disclosure relates to a vehicle. Japanese Patent Publication No. 2010-166676 discloses a battery electric vehicle that cools the battery (energy storage device) when the vehicle is near the destination, thereby suppressing the battery from becoming high temperature when charging the battery at the destination. The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which similar reference numerals indicate similar elements. FIG. 1 is a drawing showing an example of the configuration of a vehicle in one embodiment of the present disclosure. FIG. 2 is a flowchart showing the processing sequence of the pre-cooling process executed in the ECU (40). FIG. 3 is a graph showing the relationship between the SOC of the battery (10) and the charging current flowing through the battery (10) according to the maximum current of the external charging device. Figure 4 is a flowchart showing the processing steps of the pre-cooling treatment in the modified example. Figure 5 is a diagram showing a temperature map. Hereinafter, embodiments and variations of the present disclosure will be described in detail with reference to the drawings. Additionally, identical or substantial parts in the drawings are denoted by the same reference numerals, and their descriptions are not repeated. FIG. 1 is a drawing showing an example of the configuration of a vehicle in one embodiment of the present disclosure. The vehicle (100) is a vehicle that can be charged by connecting it to an external charging device (200). The vehicle (100) is, for example, a battery electric vehicle. The vehicle (100) may be a vehicle configured to be externally charged, for example, a plug-in hybrid electric vehicle. The external charging device (200) may be a fast charger or an ultra-fast charger. The external charging device (200) may be a standard charger. The vehicle (100) is equipped with an MG (Motor Generator) (1), a power transmission gear (2), a drive wheel (3), a PCU (Power Control Unit) (4), an SMR (System Main Relay) (5), a charging device (6), a charging relay (7), an inlet (8), a battery (10), a monitoring unit (20), a cooling device (30), an ECU (Electronic Control Unit) (40), and a navigation system (50). The vehicle (100) is configured to drive by using the MG (1) as a driving source and supplying power accumulated in the battery (10) to the MG (1) via the PCU (4). MG (1) is, for example, a three-phase AC rotating electric machine and has the function of an electric motor and a generator. The output torque of MG (1) is transmitted to the drive wheel (3) through a power transmission gear (2) configured to include a reduction gear and a differential. When the vehicle (100) is braking, MG (1) is driven by the drive wheel (3), and MG (1) operates as a generator. MG (1) can function as a braking device that performs regenerative braking to convert the kinetic energy of the vehicle (100) into electricity. The regenerative power generated by regenerative braking in MG (1) is stored in the battery (10). The PCU (4) is a power conversion device that converts power bidirectionally between the MG (1) and the battery (10). The PCU (4) includes an inverter and a converter that operate based on a control signal from, for example, the ECU (40). When the battery (10) is discharged, the converter boosts the DC power supplied from the battery (10) and supplies it to the inverter, and the inverter converts the DC power supplied from the converter into AC power to drive the MG (1). When the battery (10) is charged, the inverter converts the AC power generated by the MG (1) into DC power and supplies it to the converter, and the converter reduces the DC power supplied from the inverter to a voltage suitable for charging the battery (10) and supplies it to the battery (10). The SMR (5) is electrically connected between the PCU (4) and the battery (10). The SMR (5) operates according to a control signal from the ECU (40). When the SMR (5) is closed (i.e., in a conductive state) according to the control signal from the ECU (40), power can be transferred between the PCU (4) and the battery (10). On the other hand, when the SMR (5) is open (i.e., in a cut-off state) according to the control signal from the ECU (40), the electrical connection between the PCU (4) and the battery (10) is cut off. The charging device (6) generates direct current power capable of charging the battery (10) from the power supplied from the inlet (8). The charging device (6) operates according to a control signal from the ECU (40). The charging device (6) may, for example, convert alternating current power supplied from the inlet (8) into direct current power, or may increase or decrease the voltage of the direct current power supplied from the inlet (8) to a voltage suitable for charging the battery (10). The charging relay (7) is electrically con