Fuel cell polar plate and fuel cell using the same

Abstract

The invention discloses a polar plate of a fuel cell, wherein, one surface of the polar plate is provided with a channel, the channel comprises two groups of intake channels and one group of outgassing channels, the two groups of intake channels are respectively positioned at the two sides of the outgassing channel, a separator is arranged between the each group of intake channels and the outgassing channel, and the separator separates the intake channel from the outgassing channel so as to impel gas to enter a gas diffusion layer adjacent to the separator in a compulsory convective way. The arrangement of the two groups of intake channels and the separator can effectively reinforce the compulsory convective diffusion effect of flows in the channel of the polar plate, can carry away surplus moisture accumulated in the gas diffusion layer, and can increase the generation efficiency of the fuel cell.

Description

Technical field [0001] The invention relates to a fuel cell electrode plate, in particular to a fuel cell electrode plate of a proton exchange membrane fuel cell and a fuel cell using the electrode plate. Background technique [0002] In recent years, there have been many major breakthroughs in fuel cell technology. Among them, Proton Exchange Membrane Fuel Cell (PEMFC) has received considerable attention, and governments and businesses all over the world have invested considerable research and development energy. [0003] In addition to the advantages of general fuel cells such as pollution-free and high energy conversion efficiency, the proton exchange membrane fuel cell has the characteristics of close to normal temperature operation and rapid activation. It is especially suitable for transportation power, portable power and household power generation. [0004] The key components of a fuel cell include electrodes, proton exchange membranes (electrolytemembrane), and bipolar plates...

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Problems solved by technology

[0006] However, the flow of the airflow 60 in the inlet flow channel 52, the outlet flow channel 54 and the diffusion flow channel 56 is basically a laminar flow, and it is difficult to fully enter the gas diffusion layer through the diffusion effect to participate in the electrochemical reaction, so that the power generation efficiency of the fuel cell not tall

In addition, the excessive moisture generated by the electrochemical reaction cannot be discharged in time through the outlet flow channel 54, and the excessive moisture will accumulate and block the pores in the gas diffusion layer, affecting the transmission of gas, thereby further hindering the electrochemical process. The progress of the reaction

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