Fuel cell system and normal-temperature starting method thereof

Abstract

The invention discloses a fuel cell system and a normal-temperature starting method thereof. The fuel cell system comprises an electric pile, a fuel cell controller and an air subsystem, the air subsystem comprises an air compressor, an intercooler, a humidifier, a first bypass valve, a second bypass valve and a temperature and pressure sensor, and the opening degree of the first bypass valve and the opening degree of the second bypass valve are adjustable. The fuel cell controller adjusts the opening degree of the first bypass valve according to the temperature value detected by the temperature and pressure sensor; when the humidifier is not needed, the humidifier is cut out, so that the situation that the fuel cell system does not comprise the humidifier is realized; when the humidifier is needed, the humidifier is connected into the air subsystem, and the humidity of air entering the galvanic pile is adjusted by adjusting the opening degree of the first bypass valve through the fuel cell controller, so that when excessive moisture is not needed, the flow of the air flowing through the humidifier can be reduced, and the humidity of the air entering the galvanic pile is reduced. And thus, the normal-temperature starting temperature rise speed of the fuel cell system is increased.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell system and a normal temperature startup method thereof. Background technique [0002] At present, the stacks of some fuel cell manufacturers require humidifiers, while others do not. Different fuel cell systems need to be manufactured according to the needs of different manufacturers, and the versatility of fuel cell systems is poor. In addition, in a system with a humidifier, the demand for the humidification of the fuel cell system is not clear, resulting in a slow start-up temperature rise of the fuel cell system at room temperature, and it is difficult to quickly respond to the power demand of the external system. [0003] Therefore, how to improve the versatility of the fuel cell system and the temperature rise rate at normal temperature startup is a technical problem to be solved urgently by those skilled in the art. SUMMARY OF THE INVENTION [0004] In vi...

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Problems solved by technology

[0002] At present, some fuel cell manufacturers need humidifiers for their stacks, and some do not. Different fuel cell systems need to be manufactured according to the needs of different manufacturers, and the versatility of fuel cell systems is poor.

In addition, in a system with a humidifier, the demand for the humidification capacity of the fuel cell system is not clear, resulting in a slow start-up temperature rise of the fuel cell system at room temperature, and it is difficult to quickly respond to the power demand of the external system

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