Minus 20 DEG C-quick start proton exchange membrane fuel cell system

Abstract

The invention relates to a minus 20 DEG C-quick start proton exchange membrane fuel cell system. The minus 20 DEG C-quick start proton exchange membrane fuel cell system comprises a cell system, a control console, an air inlet heating belt, an air inlet valve, an inner circulation switch, a water pump, an outer circulation heat sink, a water tank heater, a hydrogen inlet valve, an outer circulation switch, a water tank heating relay, a tee joint, an air humidifying tank, a humidifying tank switch and a water tank as well as a high-molecular polymer plate arranged between a galvanic pile end cell of the cell system and a galvanic pile end plate and an external direct-current power source connected on an output terminal of the cell system, wherein the control console is used for controlling the connection and disconnection of the external direct-current power source through an external direct-current power source controller. The minus 20 DEG C-quick start proton exchange membrane fuel cell system has the beneficial effects that the cold boot time of the cell can be obviously shortened, and the low-temperature property of the cell is increased; and the structure is simple, auxiliary units are few, the operation is simple, and the reliability is higher.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cells, in particular to the low-temperature start-up technology of proton exchange membrane fuel cells. Background technique [0002] The low-temperature start-up of foreign fuel cells is more advanced. Among them, Ballard has been able to start the 30KW electric stack at minus 30 degrees; It can accelerate from 0 to 60 miles, with a maximum speed of 100 miles per hour, and can start at minus 20 degrees; the Sequel fuel cell vehicle launched by General Motors has excellent cold start performance, and can provide it in 30S at a low temperature of minus 20 degrees. power. Domestically, fuel cells can be started at a low temperature of minus 20 degrees, but the start-up time is long and the start-up speed is slow. [0003] At present, the low-temperature cold start strategy of fuel cells mainly focuses on purging the cells with inert gas to remove water before the stack is frozen, so th...

AI Technical Summary

Problems solved by technology

[0005] (1) Connect the external heating power supply to heat the battery system, which increases the complexity of the system

[0006] (2) Connecting an external power supply increases the energy consumption of the system and reduces the efficiency of the system

[0007] (3) The low-temperature performance improvement of fuel cells is limited

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