Non-power consumption hydrogen gas circulating method for fuel cell and its device

Abstract

The invention relates to a fuel cell non-powered consumption hydrogen gas circulating method and apparatus. The high pressure hydrogen gas of the hydrogen gas storage enters into the hydrogen gas circulating condenses pump driving end to drive the piston of the hydrogen gas circulating condenses pump to a certain position, then it enters into the buffer bucket and then the fuel cell pile, the excess hydrogen gas and the water generated by the reaction enters into the water-hydrogen separator and then the hydrogen gas circulating condenses pump condenses end, it enters into the buffer bucket after the forcing of the hydrogen gas circulating condenses pump, and then it mixes the hydrogen gas from the hydrogen gas circulating condenses pump driving end. The apparatus comprises a hydrogen gas storing bucket, a hydrogen gas circulating condenses pump, a buffer bucket, a fuel cell pile, and a water-hydrogen separator.

Description

technical field [0001] The invention relates to an auxiliary device of a fuel cell, in particular to a hydrogen circulation method and device for a fuel cell without power consumption suitable for medium and low voltage operation. Background technique [0002] A fuel cell (Fuel Cell, FC) is a power generation device that directly converts the chemical energy of fuel (mainly hydrogen) into electrical energy through an electrochemical reaction. Its core component is a membrane electrode (MEA), which consists of a proton exchange membrane and a membrane. It consists of two porous conductive materials sandwiched on both sides. Small catalysts for electrochemical reactions are evenly distributed on the two boundary surfaces of the membrane and the conductive material, such as catalysts loaded with Pt (cathode) and loaded with Pt-Ru (anode). Conductive materials can be used on both sides of the membrane electrode to extract the electrons generated by the chemical reaction to form...

AI Technical Summary

Problems solved by technology

[0007] (2) The volumetric fluid compression pump needs to consume a large amount of power when circulating a large flow rate of hydrogen (such as a flow rate of several hundred liters per minute)

[0008] (3) The volumetric fluid compression pump is noisy, and it is not easy to seal, and it is prone to hydrogen leakage

[0010] (1) The processing requirements of the elastic pump are very high, and each processed elastic pump can only work under specific working conditions, and the versatility is small

[0011] (2) The elastic pump can only suck back a certain flow of hydrogen gas when the high-pressure gas flows rapidly, and it is only suitable for fuel cells operating at high pressure, and its scope of application is narrow

[0015] (3) The hydrogen circulation fan needs to be sealed with bearings, which increases the difficulty

Images