Fuel cell bus energy management control method

Abstract

The invention provides a fuel cell bus energy management control method. The method comprises the steps: enabling a vehicle control unit to determine first request fuel cell system output power according to the SOC of a power cell; determining the output power of a second request fuel cell system according to the SOC of the power cell and the vehicle speed; determining the output power of a thirdrequest fuel cell system according to the required power of the whole vehicle; taking the maximum value of the output power of the first request fuel cell system, the output power of the second request fuel cell system and the output power of the third request fuel cell system as the output power of the final request fuel cell system; and finally, enabling the vehicle control unit to send the final requested output power of the fuel cell system to a fuel cell system controller, and enabling the fuel cell system controller to control the fuel cell system to correspondingly execute the operation. The method is simple and feasible, the SOC change interval of the power battery can be reduced, the bus energy requirement is met, and the service life of the power battery is prolonged.

Description

technical field [0001] The invention relates to a fuel cell bus energy management control method. Background technique [0002] The energy supply of a fuel cell bus includes a power battery and a fuel cell system. During the use of the bus (in hybrid mode, that is, when the fuel cell system is started), it is generally necessary to manage the energy in order to better meet the needs of the bus. energy demand, and at the same time better ensure the performance and life of the fuel cell system and power battery. However, the existing energy management control methods for fuel cell buses mostly adopt on-off control, that is, start or stop the fuel cell system according to the power battery SOC (charge maintenance), for example, when the power battery SOC is greater than a certain value, the fuel cell system is stopped. ; start the fuel cell system after the SOC of the power battery is less than a certain value, and the smaller the SOC of the power battery, the greater the outp...

AI Technical Summary

Problems solved by technology

This control method only determines the output power of the fuel cell system based on the SOC of the power battery, which will cause the fuel cell system to output higher power only when the SOC of the power battery is relatively low, and cannot output high power in advance before the SOC of the power battery decreases. Adapt to power batteries with low energy, resulting in a large range of power battery SOC changes, large power consumption of power batteries per 100 kilometers, high hydrogen consumption, affecting the life of power batteries and vehicle power performance