JP-2026075381-A - Electric vehicles
Abstract
[Problem] When an electric vehicle runs on a circuit course, protect the energy storage device from overheating while avoiding a decrease in driving performance caused by polarization of the energy storage device. [Solution] The vehicle 10 includes a battery 105, a cooling device 110, and an ECU 160. The battery 105 stores power for the vehicle 10 to run. The cooling device 110 cools the battery 105. The ECU 160 controls the cooling device 110. When it is determined that the vehicle 10 is running on a circuit course, the ECU 160 stops the cooling device 110 when it is predicted, according to the driving history which shows the history of the vehicle 10's driving patterns, that the driving performance of the vehicle 10 will deteriorate due to polarization of the battery 105. [Selection Diagram] Figure 1
Inventors
- 和田 好平
Assignees
- トヨタ自動車株式会社
Dates
- Publication Date
- 20260508
- Application Date
- 20241022
Claims (1)
- It is an electric vehicle, A power storage device for storing electricity for the operation of the aforementioned electric vehicle, A cooling device for cooling the aforementioned energy storage device, The system includes a control device for controlling the cooling device, If it is determined that the electric vehicle is running on a circuit course, the control device will: An electric vehicle that shuts down the cooling system when it is predicted, according to a driving history showing the history of the electric vehicle's driving patterns, that the driving performance of the electric vehicle will deteriorate due to polarization of the energy storage device.
Description
This disclosure relates to electric vehicles. Japanese Patent Publication No. 2013-218835 (Patent Document 1) discloses a battery temperature control device. This temperature control device comprises a concentration polarization calculation means, an average concentration polarization calculation means, a concentration polarization reduction necessity determination means, and a battery temperature control means. The concentration polarization calculation means calculates the concentration polarization of the battery. The average concentration polarization calculation means calculates the average concentration polarization, which is the average value of the concentration polarization per unit time. The concentration polarization reduction necessity determination means determines whether the concentration polarization of the battery needs to be reduced based on the average concentration polarization. The battery temperature control means heats the battery if it is determined that concentration polarization reduction is necessary. Japanese Patent Publication No. 2013-218835 This is a diagram illustrating the configuration of an electric vehicle according to an embodiment.This diagram illustrates the layout of the circuit course on which the electric vehicle runs, the driving history of the electric vehicle, and the charge/discharge history of the electric vehicle's energy storage device.This is a flowchart illustrating the processes performed by the ECU (Electronic Control Unit) in the embodiment. The embodiments of this disclosure will be described in detail below with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated. Figure 1 is a diagram illustrating the configuration of an electric vehicle according to an embodiment. Figure 2 is a diagram illustrating the layout of the circuit course on which the electric vehicle runs, the driving history of the electric vehicle, and the charge/discharge history of the electric vehicle's energy storage device. Referring to Figure 1, vehicle 10 is an electric vehicle, and in this example, it is a BEV (Battery Electric Vehicle) for use on a circuit course. Referring to Figure 2(A), vehicle 10 travels along the circuit course 40. The circuit course 40 includes a driving area 43 and an activation zone 47. The driving area 43 is a portion of the home straight of the circuit course 40. The activation zone 47 will be described later. Referring again to Figure 1, vehicle 10 comprises a battery 105, a current sensor 107, a voltage sensor 108, a temperature sensor 109, a cooling device 110, a PCU (Power Control Unit) 115, and an MG (Motor Generator) 120. Vehicle 10 further comprises a button 141, a GPS (Global Positioning System) 144, a storage device 145, a communication device 150, and an ECU (Electric Control Unit) 160. Battery 105 is, for example, a lithium-ion battery that stores power for the vehicle 10 to run. If battery 105 is continuously discharged at a high current, polarization of battery 105 is likely to occur. When polarization occurs, the internal resistance of battery 105 increases rapidly. Such an increase in internal resistance is particularly pronounced in the low SOC (State of Charge) region of battery 105. When polarization occurs, the voltage of battery 105 decreases, limiting the discharge current. Polarization is more likely to occur at lower temperatures of battery 105. The current sensor 107 detects the current of the battery 105 and outputs the detected value. The voltage sensor 108 detects the voltage of the battery 105. The temperature sensor 109 detects the temperature of the battery 105. The cooling device 110 cools the battery 105. The PCU 115 converts the discharge power (DC power) of the battery 105 into AC power and supplies it to the MG 120. The MG 120 receives the AC power from the PCU 115 and generates the driving force for the vehicle 10. Button 141 receives user input to temporarily increase the upper limit of the battery 105's discharge power when the vehicle 10 is driving through the activation zone 47. This user input temporarily increases the upper limit of the vehicle 10's driving force. GPS 144 acquires location information indicating the vehicle 10's current position (location coordinates). Storage device 145 stores various data. Examples of this data are described below. Referring to Figure 2(B), the storage device 145 stores the driving history 180. The driving history 180 shows the history of the vehicle 10's driving patterns. In a specific example, the driving history 180 includes location information history 182 and charge/discharge history 184. The location information history 182 is a history of location information acquired by the GPS 144, representing the change in the vehicle's position during the most recent period. The most recent period refers to the period from a predetermined time before the current time to th