Fuel cell vortex type hydrogen circulating pump and hydrogen circulating method

Abstract

The invention discloses a fuel cell vortex type hydrogen circulating pump and a hydrogen circulating method.The hydrogen circulating pump comprises a pump head end cover and a pump body, a fresh hydrogen flow channel, a circulating hydrogen flow channel and a compressed hydrogen flow channel are formed in the pump head end cover, a fixed vortex disc is fixed to the end face of the pump head end cover, and a motor is arranged in the pump body; an eccentric rotating shaft is arranged on the end face of the pump body. The motor is connected with a rotating scroll plate through the eccentric rotating shaft. The rotary scroll plate is nested on the inner side of the fixed scroll plate; the rotary scroll plate and the fixed scroll plate are engaged to form a plurality of crescent compression cavities; hydrogen discharged by the galvanic pile enters the water-gas separator, the separated hydrogen enters the compression cavity, is engaged and compressed by the rotary scroll plate and the fixed scroll plate, and is mixed with high-pressure fresh hydrogen after being compressed, and the mixed hydrogen enters the galvanic pile. The fresh hydrogen absorbs heat to cool the pump head from a high-pressure state to a low-pressure state, and the moistened circulating hydrogen plays a role in internal humidification of the galvanic pile, so that the service life of the fuel cell is prolonged.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell vortex hydrogen circulation pump and a hydrogen circulation method. Background technique [0002] A fuel cell is a device that directly converts chemical energy into electrical energy. Due to its advantages of high efficiency, low noise, low start-up temperature, and zero pollution, it is widely used in stationary power generation, transportation, and portable power supplies. [0003] Among the core components of the fuel cell, the stack is the "heart" of the fuel cell, providing electrical energy; hydrogen is equivalent to the "blood" of the fuel cell; the hydrogen circulation system is a key component to ensure the circulation of hydrogen in the stack. Therefore, the hydrogen circulation system is also one of the key technologies of the fuel cell engine. In order to increase the power density, excess hydrogen will be injected into the stack of the fu...

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Problems solved by technology

[0005] In view of the deficiencies pointed out in the above-mentioned background technology, the present invention provides a fuel cell scroll type hydrogen circulation pump and a hydrogen circulation method, aiming to solve the problems existing in the existing hydrogen circulation pump in the above-mentioned background technology

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