Fuel cell with double-sealed metal bipolar plate and silicon-injected membrane electrode structure

Abstract

A fuel cell with a dual-sealing groove metal bipolar plate and a silica gel injection membrane structure comprises a plurality of single batteries in series, positive electrodes and negative electrodes of two adjacent single batteries are connected in series to form a bipolar plate, a positive electrode plate runner, a positive electrode plate external sealing groove and a positive electrode plateinternal sealing groove are arranged in a positive electrode plate of the bipolar plate, a negative electrode plate runner, a negative electrode plate external sealing groove and a negative electrodeplate internal sealing groove are arranged in a negative electrode plate of the bipolar plate, a silica gel injection membrane electrode is arranged between the positive electrode plate and the negative electrode plate, integrated silica gel injection design is performed on dual sealing lines of the silica gel injection membrane electrode, an external sealing line, an internal sealing line and aglue permeation line are arranged, the external sealing line is arranged between the positive electrode plate external sealing groove and the negative electrode plate external sealing groove to form an external sealing ring, and the internal sealing line is arranged between the positive electrode plate internal sealing grove and the negative electrode plate internal sealing groove to form an internal sealing ring. By the fuel cell, three fluid mediums such as a fuel, a cooling agent and an combustion improver can be completely isolated, an enough sealing effect is ensured, the effective area ratio of the membrane electrode is improved, and the lifetime of the membrane electrode is prolonged.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell with a double-sealed groove metal bipolar plate and a silica gel-injected membrane electrode structure. Background technique [0002] The main core components of the fuel cell are the membrane electrode (Membrane Electrode Assembly, MEA) and the bipolar plate. The membrane electrode is mainly composed of a catalyst layer, a diffusion layer, a proton exchange membrane, etc., and the bipolar plate is composed of a cathode plate and an anode plate. At present, metal bipolar plates in fuel cells are mostly sealed with a single sealing groove. The single sealing groove here means that the depth of the sealing groove is equal, rather than the number of rings of the sealing groove. [0003] Existing fuel cells have poor airtightness, are prone to gas cross-gas and gas leakage problems, and have a relatively low effective area ratio of membrane electrodes and s...

AI Technical Summary

Problems solved by technology

[0003] Existing fuel cells have poor airtightness, are prone to gas cross-gas and leakage problems, and the effective area ratio of membrane electrodes is low and the service life is short

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