Fuel cell metal bipolar plate and manufacturing method thereof

Abstract

The invention relates to a fuel cell metal bipolar plate and a manufacturing method thereof, and belongs to the technical field of proton exchange membrane fuel cells. In the structure of the bipolarplate provided by the invention, the circular holes are distributed in the ridge of the cathode flow field, so the transmission of reaction gas and generated water under the ridge is facilitated, thedissipation of reaction heat at the ridge is also facilitated, the current density and the distribution uniformity thereof are improved, and meanwhile, the performance and the service life of a fuel cell are improved; inclined grids are evenly distributed on the two sides of the cathode flow field groove, so part of unreacted gas passing through the flow field ridge is forced to flow into the cathode flow field groove, the part of gas flowing into the cathode flow field groove plays a role in gas blocking, namely a backpressure role, on reaction gas originally flowing through the cathode flowfield groove, and the current density of the fuel cell can be improved.

Description

technical field [0001] The invention relates to a fuel cell metal bipolar plate and a manufacturing method thereof, belonging to the technical field of proton exchange membrane fuel cells. Background technique [0002] Hydrogen energy is a recognized clean energy with the characteristics of "high energy density, zero emission, high efficiency, wide source, and renewable", which meets the requirements of environmental protection and sustainable development. The hydrogen energy industry has always been hailed as an "industry without a ceiling", with a huge industrial chain, involving a wide range of areas, and has a huge driving force for related industries and economic development. [0003] The acquisition of hydrogen can not only be produced through renewable energy, but also can be produced with the help of traditional energy low-carbon technology. The technological revolution in the way of hydrogen energy acquisition will help promote the leapfrog development of my count...

AI Technical Summary

Problems solved by technology

For the dispensing and sealing process, a dispensing machine is used to dispense glue on the surface of the bipolar plate, and the cured adhesive strip has a height error (the difference between the highest point and the lowest point of the adhesive strip on the bipolar plate> 50μm), especially It is difficult to deal with the dispensing node and starting point. On the one hand, it is easy to cause the airtightness of the bipolar plate to be unqualified, which affects the normal operation of the stack. On the other hand, due to the height error of the rubber strip, it affects the uniformity of the compression of the gas diffusion layer. performance, thus affecting the life of the stack

The use of prefabricated (sealing gasket) sealing refers to the installation of silicone rubber sealing gaskets on the bipolar plate and extrusion sealing with the membrane electrode frame. The current integrated operation process of prefabricated sealing gaskets and bipolar plates is cumbersome. The efficiency is not high, and it is difficult to achieve continuity and automation

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