Cold start system of fuel cell

Abstract

The invention provides a cold start system of a fuel cell. The fuel cell comprises a coolant inlet and a coolant outlet; the cold start system comprises a regulating valve, a water pump, a heater andan air supply pipe integrated cavity; a coolant pipe is distributed on the inner wall of the air supply pipe integrated cavity; a hydrogen circulation pipeline and an air circulation pipeline are arranged in the air supply pipe integrated cavity; the hydrogen circulation pipeline and the air circulation pipeline are used for supplying hydrogen and air to the fuel cell respectively; the coolant outlet is connected with an inlet of the regulating valve through the water pump; a first outlet of the regulating valve communicates with one end of the coolant pipe through a first connecting pipeline;the other end of the coolant pipe communicates with the coolant inlet; the heater is arranged on the first connecting pipeline; and the heater is used for heating a coolant in the coolant pipe. According to the technical scheme, comprehensive heating of the hydrogen circulation pipeline, the air circulation pipeline and the fuel cell can be realized, and the heating efficiency is high.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a cold start system for fuel cells. Background technique [0002] A fuel cell system is a system in which hydrogen and oxygen generate electricity through an electrochemical reaction, and water is produced. In practical applications, the fuel cell system usually needs to be started and operated in a low temperature (eg -30°C-0°C) environment. As the fuel cell generates water during operation, there will be liquid water inside the fuel cell and in the gas supply pipeline. When the current operating cycle of the fuel cell is over, the liquid water will condense or freeze in a low-temperature environment, affecting The next normal startup and operation of the fuel cell. [0003] In the prior art, when the fuel cell needs a low-temperature cold start, multiple heaters are usually used to separately and locally heat the gas pipeline (hydrogen pipeline and air pipeline) of the fue...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fuel cell cold start system in order to overcome the defect in the prior art that the fuel cell cannot be efficiently and comprehensively heated inside the fuel cell and the gas pipeline when the fuel cell needs a low temperature cold start

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