Combined heating fuel cell low-temperature starting system and working method

Abstract

The invention relates to a combined heating fuel cell low-temperature starting system comprising a cooling liquid circulating pipeline, an electric pile, a waste gas mixing box, and an air supply pipeline and a hydrogen supply pipeline which are connected with the electric pile and the waste gas mixing box. The cooling liquid circulating pipeline is connected with the electric pile; the waste gasmixing box is communicated with the atmosphere to exhaust waste gas. The low-temperature starting system further comprises a heating assembly. The cooling liquid circulating pipeline comprises a cooling liquid heat exchanger; the air supply pipeline comprises an air heat exchanger, the hydrogen supply pipeline comprises a hydrogen heat exchanger, and the heating assembly is connected with the cooling liquid heat exchanger, the air heat exchanger and the hydrogen heat exchanger. Compared with the systems in the prior art, the system has the advantages that the fuel cell can be rapidly started in a low-temperature environment and the energy utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a combined heating fuel cell low-temperature starting system and working method. Background technique [0002] A proton exchange membrane fuel cell is a power generation device that directly converts the chemical energy of fuel (such as hydrogen) into electrical energy. As long as the fuel and oxidant are continuously supplied, the fuel cell will continuously output the product water, electricity and heat. It has the advantages of high power generation efficiency, low noise and zero emissions. It is considered to be one of the cleanest and most efficient new energy power generation devices and can be widely used in the automotive field. [0003] The water generated by the fuel cell may freeze at low temperature, and the ice will cover the diffusion layer and the catalytic layer, hindering the transmission of hydrogen and air. It is of great significance to accelerate the res...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing technologies use heat preservation and external heating methods. Heat preservation is to maintain the battery temperature above 0°C to avoid the cold start process. However, this method consumes a lot of energy and needs to increase the complexity of the system. Generally, PTC or PTC is used for heating. Hydrogen catalysis heats the cooling liquid. For example, Chinese patent CN106558713A utilizes hydrogen catalytic reaction to exothermicly heat the cooling liquid, and the cooling liquid then heats hydrogen and air. Combined heating fuel cell low temperature starting system and working method

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