Fuel cell integrated metal bipolar plate assembly structure

Abstract

The invention provides a fuel cell integrated metal bipolar plate assembly structure which comprises a single cell assembly. The single cell assembly comprises an anode plate, a cathode plate and a membrane electrode. Both the anode plate and the cathode plate include an electrode plate flow field region structure and an electrode plate peripheral structure. The membrane electrode is provided witha membrane electrode positioning hole. The electrode plate peripheral structures of the anode plate and the cathode plate are provided with a membrane electrode anode-side positioning column and a membrane electrode cathode-side positioning column, which match the peripheral structures, respectively, so as to realize positioning between the membrane electrode, the anode plate and the cathode plate. The membrane electrode anode-side positioning column and the membrane electrode cathode-side positioning column are provided with matched clamp groove and buckling protrusion respectively, so thatthe anode plate and the cathode plate are interlocked and clamp the membrane electrode. The electrode plate peripheral structures of the anode plate and the cathode plate are provided with matched assembly positioning hole and assembly positioning pillar. When a number of single cell assemblies are stacked, two adjacent single cell assemblies are precisely positioned, and the membrane electrode isprevented from being damaged due to misaligned assembly.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell integrated metal bipolar plate assembly structure. Background technique [0002] The single-cell assembly of a fuel cell consists of a membrane electrode sandwiched between a cathode plate and an anode plate. The traditional method is to make the cathode plate and the anode plate into one body, that is, a bipolar plate, and a plurality of bipolar plates and membrane electrodes are stacked to form a fuel cell stack, and the fuel cell stack is clamped by two end plates to form a fuel cell. [0003] Traditional fuel cells have the following disadvantages during assembly: (1) Before the assembly is completed, the bipolar plates and membrane electrodes cannot form a complete single cell assembly; (2) During the assembly process of the bipolar plates and membrane electrodes of fuel cells, Membrane electrodes are directly exposed to the environment; (3) see figure 1 , d...

AI Technical Summary

Problems solved by technology

[0003] Traditional fuel cells have the following disadvantages during assembly: (1) Before the assembly is completed, the bipolar plates and membrane electrodes cannot form a complete single cell assembly; (2) During the assembly process of the bipolar plates and membrane electrodes of fuel cells, Membrane electrodes are directly exposed to the environment; (3) see figure 1 , due to the manufacturing tolerance and assembly error of the positioning column 3', the bipolar plates 1' on both sides of the membrane electrode 2' are prone to misalignment, which will cause the membrane electrode 2' to be damaged by shear force; (4) Assembly misalignment will The contact area of ​​the membrane electrode of the multi-layer structure is inconsistent, resulting in poor contact uniformity

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