Fuel cell waste heat recovery system and vehicle

Abstract

The invention relates to the technical field of fuel cells, in particular to a fuel cell waste heat recovery system and a vehicle, the system comprises a cold source side, a heat source side and a thermoelectric conversion module located between the cold source side and the heat source side; the fuel cell exchanges heat with the heat source side; when the temperature of the fuel cell is greater than a preset value, the thermoelectric conversion module converts heat energy into electric energy; when the temperature of the fuel cell is smaller than a preset value, the thermoelectric conversion module is reversely electrified to heat the heat source side; the thermoelectric conversion module is adopted, low-grade heat energy is directly converted into electric energy through the Seebeck effect of a semiconductor thermoelectric power generation material, the heat dissipation burden of a heat dissipation system can be relieved, the electric energy can be reused by other vehicle-mounted electric appliances, the operation efficiency of the system is improved, and the purpose of saving energy is achieved; and meanwhile, the electric pile can be heated in the reverse direction under the electrifying condition, the cold start performance of the system is improved, the fuel cell does not need to be heated through PTC, and the system cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell waste heat recovery system and a vehicle. Background technique [0002] The operating temperature of low-temperature proton exchange membrane fuel cells is generally between 70-90°C, and a large amount of heat is generally generated during operation, and its heating power can be roughly equivalent to its power generation power, and can be as high as 100kW or even higher. at the same time [0003] In order to expand the scope of application and improve product competitiveness, in order to meet the lower requirements of cold start temperature performance, the existing electric stack system will be equipped with electric heating equipment to ensure the low temperature cold start performance of the electric stack. However, additional heating equipment will Occupies the volume and quality of the system, resulting in a decrease in the volume power density and mass powe...

AI Technical Summary

Problems solved by technology

[0003] In order to expand the scope of application and improve product competitiveness, in order to meet the lower requirements of cold start temperature performance, the existing electric stack system will be equipped with electric heating equipment to ensure the low temperature cold start performance of the electric stack. However, additional heating equipment will Occupies the volume and quality of the system, resulting in a decrease in the volume power density and mass power density of the system

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