Fuel cell engine purging system and control method thereof

Abstract

The invention discloses a fuel cell engine purging system and a control method thereof. The fuel cell engine purging system is mainly composed of an air filter, an air compressor, an intercooler, a humidifier bypass valve, an anode purging shut-off valve, an electric pile air inlet shut-off valve, an electric pile air outlet shut-off valve, an air humidifier, a back pressure valve, a vacuum shut-off valve, a hydrogen tail exhaust valve, a hydrogen cycle pump, a three-way steering valve and a hydrogen inlet shut-off valve. The residual water can be fully removed in a short time with low energyconsumption.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a fuel cell engine purging system and a control method thereof. Background technique [0002] There are many factors that affect the low-temperature start-up performance of fuel cells, and one of the most important aspects is the initial water content of the stack at low-temperature cold start. [0003] In the prior art, after the fuel cell engine is shut down, the cathode / anode is usually purged with air to reduce the residual water content, thereby improving the success rate of low-temperature cold start. Specifically, in the prior art, the cathode / anode air of the stack is usually purged by an air compressor, and after a fixed time, it is considered that the residual water content has been removed and the purging ends. [0004] The inventor believes that the prior art has the following defects and deficiencies: [0005] 1. Short-term air purging cannot completely r...

AI Technical Summary

Problems solved by technology

[0005] 1. Short-term air purging cannot completely remove the residual water content of cathode / anode and membrane;

[0006] 2. When the water content is reduced to a certain level, continuous air sweeping has little effect;

[0007] 3. Long-term air purging will greatly increase the energy consumption of the air compressor and reduce the overall efficiency of the engine

Images