Power-down and power-up control method of fuel cell car, vehicle control unit and electric automobile

Abstract

The invention discloses a power-down and power-up control method of a fuel cell car, a vehicle control unit and a car, wherein the power-down and power-up control method of the fuel cell car includes steps of acquiring a power-up command or a power-down command; controlling a power-up system of the fuel cell car to power up according to the power-up command or controlling a power-down system of the fuel cell car to power down according to the power-down command. The method has advantages of building up signal interaction logic methods between VCU and BMS, VCU and MCU, VCU and APU, VCU and an air conditioning controller, and VCU and DCDC, realizing monitoring of the vehicle high-pressure state by the VCU, improving the APU working efficiency after the power-up of the vehicle high-pressure system, rejecting the high pressure discharge risk caused by mismatching of the vehicle power-down and the APU power-down, and improving the safety of the high pressure system.

Description

technical field [0001] The invention relates to the field of fuel cell vehicles, in particular to a method for controlling power on and off of a fuel cell vehicle, a vehicle controller and an electric vehicle. Background technique [0002] Fuel cell vehicles mainly use hydrogen as fuel, and use the electrochemical reaction of hydrogen and oxygen to generate electricity as a power source. Compared with traditional vehicles, fuel cell vehicles have no pollution in emissions; compared with pure electric vehicles, the fuel loading time is shorter, Long driving range. At present, there are few power-on and power-off control methods for fuel cell vehicles. When the vehicle is powered on, the temperature of the stack in the APU directly affects the conversion efficiency of the fuel cell. The timing mismatch between the power-off of the vehicle and the power-off of the APU may cause high voltage. Discharge risk, thereby affecting the safety of the high-voltage system of the vehicle...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a fuel cell vehicle power-on and power-off control method, a vehicle controller and an electric vehicle, which solve the problems caused by the low conversion efficiency of the fuel cell and the timing problems of power-off of the whole vehicle and power-off of the APU. The problem of high voltage discharge risk

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