Fuel cell bus energy management control method

Abstract

The invention provides an energy management control method for a fuel cell bus. The vehicle controller determines the output power of the first requested fuel cell system according to the size of the power battery SOC; determines the second requested fuel cell system according to the size of the power battery SOC and the vehicle speed. Output power; determine the third requested fuel cell system output power according to the required power of the vehicle, and take the maximum of the first requested fuel cell system output power, the second requested fuel cell system output power and the third requested fuel cell system output power The value is used as the final requested fuel cell system output power, and finally the vehicle controller sends the final requested fuel cell system output power to the fuel cell system controller, and the fuel cell system controller controls the fuel cell system to execute accordingly. The invention is simple and feasible, can reduce the SOC variation interval of the power battery, meets the energy demand of the bus and prolongs the service life of the power battery.

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