Composite fuel cell power system and control method

Abstract

The invention relates to a composite fuel cell power system and a control method. The system comprises a fuel cell module, a power energy storage module, a data acquisition module and a composite power controller, wherein the fuel cell module comprises a plurality of parallel fuel cell stacks, the data acquisition module is connected with the power energy storage module and a load in an automobile, and the composite power controller is connected with the fuel cell module, the power energy storage module and the data acquisition module. The method includes the steps: acquiring electric quantitydata inside the automobile; judging the current state of the automobile according to the acquired electric quantity data; determining power required by the load and the current energy storage capacity of the power energy storage module and then adaptively controlling start of the fuel cell module and a power pure module if the current state of the automobile is a drive state; determining the current energy storage capacity of the power energy storage module and then adaptively controlling the brake process of the automobile if the current state of the automobile is a brake state. Compared with the prior art, the composite fuel cell power system has the advantages of good uniformity, low manufacturing cost, cold start rapidness, long service life, strong reliability and the like.

Description

technical field [0001] The invention relates to the field of high-power fuel cell vehicles, in particular to a composite fuel cell power supply system and a control method. Background technique [0002] In recent years, with the maturity of fuel cell technology and the reduction of cost, fuel cell vehicles have developed rapidly. The fuel cell power system for vehicles is the key technology for the development of fuel cell vehicles. For the power system of high-power fuel cell vehicles, it is very important to be able to respond quickly to the power demand of the vehicle and meet the power demand of the vehicle in real time and efficiently. Therefore, it is very important to design an efficient, reliable, long-life and economical vehicle fuel cell power system. [0003] At present, the power system of high-power fuel cell vehicles generally adopts a composite fuel cell power system, that is, a hybrid power system is composed of fuel cells combined with energy storage device...

AI Technical Summary

Problems solved by technology

[0004] 1. Consistency is difficult to guarantee

The increase of bipolar plate and MEA area leads to uneven air distribution, heat distribution, water distribution, and current distribution, which reduces the performance of the fuel cell stack

[0005] 2. Difficulty in processing and manufacturing

It increases the difficulty of manufacturing bipolar plates and MEA, and at the same time brings problems that the stack is difficult to seal and the integration test of the stack is difficult

[0006] 3. Difficulty in cold start

[0007] 4. Poor reliability

The system is composed of multiple MEAs connected in series. The reliability of the fuel cell stack is the product of the reliability of a single MEA, and the system reliability is low.

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