Auxiliary power generation control method and system of extended-range fuel cell vehicle, vehicle control unit and extended-range fuel cell vehicle

Abstract

The invention provides an auxiliary power generation control method and system for an extended-range fuel cell vehicle, a vehicle control unit and the extended-range fuel cell vehicle, and aims to prevent a fuel cell system from being overheated and prevent the service life of the fuel cell system from being shortened. The method comprises the steps of when the current remaining electric quantityof a power battery is less than a first set electric quantity value, outputting a starting instruction for requesting the fuel cell system to work so as to enable the fuel cell system to be started and enter an idling state; determining basic power generation power of the fuel cell system based on the current remaining electric quantity of the power cell; based on the accelerator pedal opening degree of the vehicle, determining the driver demand power offset; based on the wheel speed of the vehicle and the temperature of the environment where the vehicle is located, determining the maximum heat dissipation power of the vehicle; determining target generated power according to the basic generated power, the driver demand power offset and the maximum heat dissipation power; and sending the target generated power to the fuel cell system so as to enable the fuel cell system to generate power to supply power to the motor and the power battery.

Description

[0001] Technical field [0002] The invention belongs to the field of extended-range fuel cell vehicles, and in particular relates to an auxiliary power generation control method and system for an extended-range fuel cell vehicle, a vehicle controller and an extended-range fuel cell vehicle. Background technique [0003] The extended-range fuel cell vehicle is mainly composed of a fuel cell system, a vehicle control system, a power battery, a motor and its body accessories. At present, the power generation control of the fuel cell system is mainly determined by the vehicle control system according to the remaining power of the power battery. The actual needs of the driver are not considered. Under the working conditions of low battery and high power demand (such as: starting with low battery and accelerating with high throttle, low battery climbing, etc.), the vehicle's ability cannot be fully utilized, and even when the battery is extremely low, it cannot drive. At the same...

AI Technical Summary

Problems solved by technology

The actual needs of the driver are not considered. Under the working conditions of low battery and high power demand (such as: starting with low battery and accelerating with high throttle, low battery climbing, etc.), the vehicle's ability cannot be fully utilized, and even when the battery is extremely low, it cannot driving

At the same time, this control method does not take into account the difference in the heat dissipation capacity of the vehicle under different working conditions. When the heat dissipation capacity of the vehicle is low and the power generated by the fuel cell system is large, it will cause the fuel cell system to overheat, thereby reducing its service life.

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