JP-7856858-B2 - vehicle

JP7856858B2JP 7856858 B2JP7856858 B2JP 7856858B2JP-7856858-B2

Inventors

内村貴大
梅津崇
青山望

Assignees

株式会社SUBARU

Dates

Publication Date: 20260511
Application Date: 20230614

Claims (6)

Vehicle battery and A motor generator capable of inputting and outputting power to the vehicle battery and an externally provided battery, A circuit section connecting the vehicle battery and the external battery and the motor generator, A control unit that controls the vehicle battery and the external battery based on either the first mode or the second mode , Equipped with, The first mode is a mode in which power is transferred between the motor generator and the vehicle battery, power is transferred between the vehicle battery and the external battery, and power is not transferred between the motor generator and the external battery. The second mode is a mode in which power is transferred between the motor generator and the vehicle battery, and also between the motor generator and the external battery. The control unit switches to the first mode if the load on the circuit exceeds a predetermined load in the second mode. vehicle.
In the first mode, the transfer of power between the vehicle battery and the external battery is charging from the external battery to the vehicle battery. The vehicle according to claim 1.
The control unit, The vehicle according to claim 1, wherein if the power that can be output from the vehicle battery is greater than or equal to the power used by the motor generator, the output from the external battery is stopped.
The control unit, The vehicle according to claim 1, wherein the power supply to the external battery is stopped if the power that can be input to the vehicle battery is greater than or equal to the regenerative power of the motor generator.
The control unit, A vehicle according to any one of claims 1 to 4, wherein, based on the current value of the circuit and the energizing time of the circuit, it is determined by referring to a smoke emission characteristics map whether to limit the input and output of power to either the vehicle battery or the external battery.
The control unit, The vehicle according to claim 5, which determines whether to limit the input and output of power to either the vehicle battery or the external battery by referring to a smoke characteristic map based on the current value and the average value of current values over several different predetermined periods going back from the present.

Description

This invention relates to the technology of vehicles. Conventionally, vehicles have been proposed that run on motors powered by a main battery mounted on the vehicle body and a sub-battery that can be attached to and detached from the vehicle body (see, for example, Patent Document 1). Japanese Patent Application Publication No. 11-341608 This diagram shows an overview of the vehicle system configuration.This is a diagram illustrating the functional configuration of the control unit.This diagram shows the power flow when driving a motor generator in normal mode.This flowchart shows the control flow of the trailer battery in normal mode.This diagram shows the power flow when driving the motor generator in boost mode.This diagram explains the process during boost mode.This diagram explains the process during boost mode.This graph shows the smoke emission characteristics. <1. Vehicle System Configuration> Figure 1 is a diagram showing the configuration of the vehicle system 1. As shown in Figure 1, the vehicle system 1 comprises a vehicle 2 and a trailer 3. The vehicle 2 and the trailer 3 are mechanically and electrically connected via a connecting part 4. The trailer 3 is also detachable from the vehicle 2. Vehicle 2 is an electric vehicle equipped with a motor generator 11, an inverter 12, a vehicle battery 13, and a control unit 14. The motor generator 11 is a power source for driving the vehicle 2, and is, for example, a three-phase AC motor. The motor generator 11 generates driving force using electricity supplied via the inverter 12 from one or both of the vehicle battery 13 and the trailer battery 22 (described later), and transmits this driving force to the drive wheels to drive the vehicle 2. Furthermore, the motor generator 11 generates electricity by performing regenerative operation. The electricity generated by the regenerative operation of the motor generator 11 can be supplied to the vehicle battery 13 and the trailer battery 22 via the inverter 12. The inverter 12 converts the DC current input from the vehicle battery 13 and the trailer battery 22 into a three-phase AC current and outputs it to the motor generator 11. Furthermore, when the motor generator 11 performs regenerative operation, the inverter 12 converts the AC current input from the motor generator 11 into a DC current and outputs it to the vehicle battery 13 and the trailer battery 22. The vehicle battery 13 is a so-called high-voltage secondary battery and is mounted, for example, under the floor. The vehicle battery 13 stores electricity to be supplied to the motor generator 11. The vehicle battery 13 can also be charged by regenerative driving by the motor generator 11. The vehicle battery 13 may also be charged by power supplied from the trailer battery 22. The control unit 14 is composed of one or more computers such as ECUs (Electronic Control Units) and controls the vehicle 2 and trailer 3 as a whole. Further details about the control unit 14 will be described later. Trailer 3 has no power source and is towed by vehicle 2. Trailer 3 is equipped with a converter 21 and a trailer battery 22. Converter 21 is a DC (Direct Current)/DC converter. Converter 21 converts the voltage of the DC current input from the trailer battery 22 and outputs it to the vehicle 2 (motor generator 11, vehicle battery 13). Furthermore, the converter 21 converts the voltage of the DC current input from the vehicle 2 (motor generator 11) and outputs it to the trailer battery 22. The trailer battery 22 is a so-called high-voltage secondary battery. The trailer battery 22 stores electricity to supply to the motor generator 11 and the vehicle battery 13. Furthermore, the trailer battery 22 can be charged by regenerative braking by the motor generator 11. In vehicle system 1 with this configuration, compared to vehicle 2 alone, more power can be supplied to the motor generator 11 because the trailer battery 22 is connected, making it possible to extend the driving range on a single charge. On the other hand, in vehicle system 1, since vehicle 2 tows the trailer 3, the overall weight increases and the power performance decreases. Therefore, in the vehicle system 1, by simultaneously supplying power output from both the vehicle battery 13 and the trailer battery 22 to the motor generator 11, the driving force of the motor generator 11 is increased, thereby improving the power performance of the vehicle system 1. Figure 2 is a diagram illustrating the functional configuration of the control unit 14. As shown in Figure 2, the control unit 14 functions as a mode setting unit 31, a state detection unit 32, and a power supply control unit 33. The mode setting unit 31 sets the control mode for controlling the motor generator 11, vehicle battery 13, and trailer battery 22 to one of several control modes. In this embodiment, a normal mode and a boost mode are provided as control modes. However, the control modes are not limited to these and other modes may be provid