Indirect cold start icebreaking system for fuel cell hydrogen circuit

Abstract

An indirect cold start icebreaking system for a fuel cell hydrogen circuit comprises: a fuel cell stack, the fuel cell stack comprising an air side and a hydrogen side; an air supply subsystem, comprising an air compressor; and a hydrogen supply subsystem. A tee joint is arranged on a pipeline between the air compressor and the intercooler, the tee joint is connected with a hydrogen inlet in the hydrogen side through a third switch valve, and hot air exhausted by the air compressor enters the air side through the tee joint and the intercooler on one hand and enters the hydrogen side through the tee joint and the third switch valve on the other hand. Pressure balance of the air side and the hydrogen side is kept, then the hot air enters the gas-water separator and the hydrogen circulating pump from a hydrogen outlet of the hydrogen side, and ice breaking is conducted on the hot air in the hydrogen circulating pump. The hydrogen circulating pump can be rapidly filled with hot air, the frozen part of the rotor can be rapidly subjected to ice breaking and melting, the consumed time is short, the ice breaking effect is good, the hydrogen circulating pump can be rapidly started to work normally, and normal operation of the whole fuel cell system is guaranteed.

Description

Technical field: [0001] The invention relates to an indirect cold start ice breaking system of a fuel cell hydrogen circuit. Background technique: [0002] At present, the development of new energy fuel cell vehicles is considered an important link in the transformation of transportation energy and power. In order to ensure the normal operation of fuel cell engines, fuel cell engines generally require auxiliary systems such as hydrogen supply subsystems, air supply subsystems, and circulating water cooling management subsystems. , a large number of studies have shown that high-pressure, high-flow air supply has a significant effect on improving the power output of existing fuel cell engines. [0003] For the air supply subsystem, the air is generally pressurized by an air compressor. For the hydrogen supply subsystem, the hydrogen-containing mixed gas is generally pressurized by a hydrogen circulation pump and circulated back to the fuel cell for recycling. . When working,...

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies in the prior art, the present invention provides an indirect cold-start ice-breaking system for the fuel cell hydrogen circuit, which solves the problems of long internal ice-breaking time and poor ice-breaking effect of the previous hydrogen circulation pump, and solves the problems caused by the hydrogen circulation pump in the past. Freezing affects the normal operation of the entire fuel cell system

Images