A whole vehicle power distribution control method and system for a fuel cell vehicle

Abstract

The invention provides a whole vehicle power distribution control method for a fuel cell vehicle. The whole vehicle power distribution control method comprises the following steps: determining a driving required torque based on a vehicle speed and the accelerator pedal aperture; determining driving power based on the driving required torque, the motor efficiency and a motor rotating speed; based on a power battery voltage and a power battery current, determining the power battery charging and discharging electric quantity; determining a power battery required power based on the power battery charging and discharging electric quantity and the power battery electric quantity; taking a sum value obtained by adding the driving required power and the power battery required power as the fuel battery required power; optimizing the required power of the fuel cell based on the electric quantity of the power battery and the efficiency curve of the fuel cell system. The invention further providesa whole vehicle power distribution control system of the fuel cell vehicle. On the basis of protecting the power battery, the efficiency of the power battery is maximized, and on the basis of protecting the fuel cell system, a hydrogen consumption index of the whole vehicle is reduced to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of fuel cell vehicles, and relates to a power distribution control algorithm and system that comprehensively considers the efficiency of fuel cells and power cells, specifically a fuel cell vehicle power distribution control method and system. Background technique [0002] With the aggravation of global environmental pollution and the decline of oil reserves, electric vehicles have gradually entered people's lives. In recent years, electric vehicle technology has achieved rapid development, but according to market feedback, short driving range and long charging time have become the main bottlenecks restricting the promotion of electric vehicles. Therefore, fuel cell vehicles have emerged as the times require. [0003] Fuel cell vehicles mainly use H 2 As the main energy source, it is equipped with Ni-MH battery or super capacitor as auxiliary energy source. During the running of the vehicle, the H in the f...

AI Technical Summary

Problems solved by technology

Compared with the other two configurations, the performance of the power system of the full-power fuel cell vehicle has obvious advantages, but during the operation of the vehicle, uncertain working conditions will cause the output power of the fuel cell system to fluctuate continuously, which will affect The life of the fuel cell system has a certain impact

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