A hydrogen fuel cell system

Abstract

The invention discloses a hydrogen fuel cell system, which relates to the technical field of fuel cells. The system includes: a battery stack, an air compressor, a first humidity exchange device and a controller, and the first humidity exchange device is arranged between the air compressor and the controller. Between the battery stacks, the first humidity exchange device receives the dry air from the air compressor, and performs humidity exchange between the dry air and the anode tail gas of the battery stack, and then transports the humidity-exchanged anode tail gas to the The anode inlet of the battery stack; the controller obtains the water transfer coefficient of the first humidity exchange device, the temperature and pressure of the anode outlet of the battery stack, the temperature and pressure of the air compressor outlet, and controls the first humidity The exchange device receives a flow of dry air. The invention has a good dehumidification effect, does not involve the discharge of liquid water, avoids the discharge of hydrogen gas, has a high utilization rate of hydrogen gas, and can accurately control the humidity of hydrogen gas in the tail gas, meeting the requirements of the anode electrochemical reaction of the battery stack under different power conditions.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a hydrogen fuel cell system. Background technique [0002] At present, environmental and energy problems are becoming more and more serious. Vehicles with hydrogen fuel cell systems are considered to be the most promising energy power devices in the future because of their advantages such as no pollution, high energy conversion efficiency, and wide source of raw materials. [0003] The cell stack is the main component of the hydrogen fuel cell system. In order to save hydrogen during the electrochemical reaction of the anode of the battery stack, the hydrogen in the anode tail gas is usually recycled. However, the humidity of the anode tail gas is high, which is not conducive to the electrochemical reaction of the anode of the battery stack. Therefore, the anode tail gas should be dehumidified before re-entering the anode of the battery stack, so that the hydrogen gas at the ...

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Problems solved by technology

[0005] The embodiment of the present invention provides a hydrogen fuel cell system to solve the technical problems of the hydrogen fuel cell system, such as unsatisfactory anode tail gas dehumidification effect, low accuracy of hydrogen humidity control, and hydrogen utilization rate in the related art

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