Low-power fuel battery automobile as well as control system and control method thereof

Abstract

The invention discloses a control system of low-power fuel battery automobile. The control system comprises a low-power fuel battery engine, a DC / DC converter, a fuel battery manager, a power battery, a power battery manager, a mode selection switch, an inverter and a whole vehicle controller. The whole vehicle controller determines that the low-power fuel battery engine works at economic power, high-level power, rated power or peak power according to a state of the mode selection switch and a charge value of the power battery, and controls the fuel battery manager according to a working mode of the low-power fuel battery engine; when the charge value of the power battery falls within a preset range, the whole vehicle controller controls the fuel battery manager to start the low-power fuel battery engine to output continuously stable power and controls the power battery to provide instant power. The control system can optimize energy distribution of a whole vehicle to enable the working point of a fuel battery system to be stable, so that the service life of the fuel battery system is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicle power devices, in particular to a low-power fuel cell vehicle and its control system and control method Background technique [0002] With the further aggravation of energy crisis and environmental deterioration, energy saving and environmental protection have become the theme of current automobile development. Among them, fuel cell vehicles are considered to be one of the main development directions of future vehicles because of their advantages such as zero emission, high efficiency, and long driving range. [0003] The operation control of the vehicle is a very complicated process. Its frequent starting, acceleration and climbing have high requirements on the power level of the power source of the power system in the vehicle, and at the same time have high requirements on the power change response time of the power source. [0004] For vehicles that use fuel cells as the main driving ...

AI Technical Summary

Problems solved by technology

However, the fixed-point output control also has its disadvantages. The disadvantage is that it needs to be equipped with a high-power power battery, which greatly increases the cost of the vehicle.

However, the power-following control strategy also has shortcomings, specifically: in the power-following control strategy, it does not take into account the matching characteristics of the power system parameters and specific driving conditions, so it cannot fully and effectively use the power battery and The role of the fuel cell is not conducive to the improvement of the operating efficiency of the vehicle power system, and, under the condition that the power demand of the vehicle changes greatly, the power following control strategy will often cause damage to the power system composed of the fuel cell

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