Fuel battery structure provided with porous metal plate

Abstract

The invention relates to a fuel battery structure provided with a porous metal plate. The fuel battery structure comprises a membrane electrode group, a first porous metal plate, a metal plate and an end plate, wherein the first porous metal plate and the metal plate are arranged on the external surface of a gas diffusion layer of the membrane electrode group respectively, and contact the gas diffusion layer through a gas flow passage; and the end plate is arranged on the external surfaces of the first porous metal plate and the metal plate, and is connected with cooling water flow passages of the first porous metal plate and the metal plate. When cooling water flows through the cooling water flow passages, because of pressure differences, the cooling water is naturally infiltrated into the gas flow passage of the first porous metal plate from a gap of the first porous metal plate to actively humidify fuels in the gas flow passage so as to maintaining the reaction efficiency of the fuel battery. The fuel battery structure avoids changes of the size of the gap due to the flushing of the cooling water after being used for a long time, and can reduce the manufacturing cost of the fuel battery structure, so the fuel battery structure is very suitable for practical application.

Description

technical field [0001] The invention relates to a fuel cell structure with a porous metal plate, in particular to a fuel cell structure with a porous metal plate which is applied to a fuel cell and can be self-humidified. Background technique [0002] In order to promote the idea of ​​green energy, the development of fuel cell technology has been paid more attention by governments and enterprises in recent years. There has been considerable progress in both academic basic research and commercial application development. For example, fuel cell electric vehicles have become the focus of the world's major automobile companies' development competition, and micro fuel cells have also injected new vitality into the future 3C electronics industry. [0003] In order for the fuel cell to generate enough electricity, the fuel cell needs to maintain a certain reaction efficiency. However, when the reaction of the fuel cell continues, that is, the temperature in the fuel cell will conti...

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Problems solved by technology

However, since the porous graphite plate itself is not hydrophilic, it needs to be treated with hydrophilicity before use, which also results in a higher manufacturing cost of the porous graphite plate.

In addition, the texture of the porous graphite plate is brittle and poor in ductility, so it is not easy to process, so when a thinner porous graphite plate is required, it is easy to break during processing, which in turn causes a burden on processing costs

[0006] Furthermore, since the porous graphite plate is sintered from graphite powder or graphite particles, after a long time of use, the cooling water will easily wash down the graphite powder or graphite particles on the edge of the pores of the porous graphite plate, and make the pores of the porous graphite plate The gradual increase also makes the cooling water contain graphite powder or graphite particles, so the cooling water containing graphite powder or graphite particles is easy to block the gas flow channel after flowing into the gas flow channel

In addition, when using porous graphite plates, in order to ensure the quality of the water, the cooling water part needs to be equipped with filters and deionizers. However, the above-mentioned devices themselves consume a lot of power, which will also reduce the power generation efficiency of the fuel cell.

[0007] This shows that above-mentioned existing fuel cell obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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