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Fuel cell bipolar plate with filter films as well as cell assembled by same

A fuel cell and bipolar plate technology, applied in fuel cell parts, fuel cells, fuel cell additives, etc., can solve problems such as difficult commercial application, pending verification, complex bipolar plate manufacturing process, etc., to achieve optimization Effects of water management, improved performance and stability

Inactive Publication Date: 2010-08-18
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In theory, these patented technologies can strengthen fluid distribution and facilitate the discharge of water in the flow field. application

Method used

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  • Fuel cell bipolar plate with filter films as well as cell assembled by same
  • Fuel cell bipolar plate with filter films as well as cell assembled by same
  • Fuel cell bipolar plate with filter films as well as cell assembled by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 is a bipolar plate provided with 5 filter membranes in a flow channel, as attached Figure 1-3 shown. The reaction gas flow channel and the cooling water flow channel on both sides of the bipolar plate have the same width of the flow channel bottom 6 and the width of the flow channel protrusion 1, the bottom of the reaction gas flow channel and the bottom of the cooling water flow channel face each other, and there are 5 An evenly distributed filter membrane 2, the bottom 6 of the flow channel is provided with 2 filter membranes, no composite material of carbon powder and resin, that is, the reaction gas flow channel and the cooling water flow channel at the filter membrane are only separated by the filter membrane. The filter membranes are evenly arranged from the 1 / 2 of the reaction gas flow channel length from the reaction gas inlet 3 to the reaction gas outlet 4. The filter membrane 2 is a square, and the center distance between two adjacent filter memb...

Embodiment 2

[0024] Example 2 is the same bipolar plate as Example 1, except that in the preparation method, the ratio of carbon powder and epoxy resin mixture used is different, and the initial position of the filter membrane is different. The initial position of the filter membrane in Example 2 is evenly arranged from the reaction gas inlet to 1 / 3 of the length of the reaction gas flow channel. The gas outlet direction is evenly arranged. In the preparation method, the ratio of carbon powder and epoxy resin mixture used is: add 10 g of epoxy resin and 1 g of release agent to 90 g of carbon powder, and preheat to 80° C. after mixing. Put the preheated part of the mixture into the half-mold with a water flow field and the through hole reserved for the filter membrane, and set the through hole for the filter membrane at the reaction gas flow of the mold half from the reaction gas inlet 1 / 3 of the length of the channel starts to the direction of the reaction gas outlet, put the cut filter m...

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Abstract

The invention relates to a fuel cell bipolar plate with filter films as well as a cell assembled by the same. A main body of the bipolar plate is made from composite materials of carbon powder and resins, a reaction air flow channel and a cooling water channel are respectively distributed at both sides of the bipolar plate, and the bottoms of the flow channels are provided with the filter films for liquid water to pass through. The fuel cell assembled by the bipolar plate has the advantages that the liquid water in the reaction air flow channel can arrive at a cooling water cavity of the fuel cell through the filter films so that the reaction air flow channel has no liquid water residuals, thereby optimizing the water management in the cell and improving the properties and the stability of the cell in running.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate. Background technique [0002] In the prior art, the water management inside the battery mainly promotes battery drainage by optimizing the shape of the flow field. The patented technology with the patent number CN1622377A relates to a proton exchange membrane fuel cell flow field structure, which is composed of a mesh flow field and baffle strips. The baffle strips are placed inside the mesh flow field, so that the fluid is locally distributed through the mesh flow field, and the overall flow is constrained by the staggered distribution of baffle strips, thereby reducing the fluid short circuit phenomenon. The patented technology with the patent number CN1822419A relates to a fuel cell serpentine flow field structure, the outlet is set at the center of the flow field plate, and the inlets are respectively set at both ends of the flow field plate. T...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M8/02H01M8/04H01M4/88H01M8/10H01M8/0202H01M8/04029H01M8/1007
CPCY02E60/521Y02E60/50
Inventor 付宇侯中军刘常福明平文
Owner SUNRISE POWER CO LTD
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