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Proton exchange membrane fuel cell metal bipolar plate

A metal bipolar plate and proton exchange membrane technology, which is applied to fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of manufacturing difficulties and high precision requirements of unipolar plates, achieve low processing costs, and meet the needs of battery replacement. Heat demand, good distribution uniformity

Active Publication Date: 2009-11-04
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unipolar plate of this flow channel requires high precision and is difficult to manufacture

Method used

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  • Proton exchange membrane fuel cell metal bipolar plate
  • Proton exchange membrane fuel cell metal bipolar plate
  • Proton exchange membrane fuel cell metal bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] attached Figure 1~5 It is the accompanying drawing of Embodiment 1. The overall size of the bipolar plate is 410x100mm, the effective area of ​​the flow field part is 340x85mm, and the rest is a sealed structure. The plate material is a 0.1mm stainless steel sheet, and the cathode and anode plates are punched by cold stamping technology, and bonded to form a bipolar plate. The thickness of the bipolar plate is 1.2mm, and the depth of the flow field is 0.5mm.

[0021] The dotted flow field bosses in the distribution section of the anode plate are elliptical bosses with a long diameter of 5.8mm and a short diameter of 4.0mm. The center position is at the midpoint of the line connecting the center positions of the two bosses in the front row. The point-like flow field boss of the cathode plate distribution section is an elliptical boss with a long diameter of 4.8mm and a short diameter of 4.6mm. The flow field of the point-shaped boss of the cathode plate is convex. The...

Embodiment 2

[0028] attached Figure 6-8 It is the accompanying drawing of Embodiment 1. The specification and shape of the bipolar plate are the same as in Example 1.

[0029]The point-shaped flow field bosses of the distribution section of the anode plate are elliptical bosses with a long diameter of 5.8mm and a short diameter of 4.0mm. The dot-shaped flow field bosses are elliptical bosses with a long diameter of 4.8mm and a short diameter of 4.6mm. The dot-shaped bosses of the cathode plate are arranged in a parallel and regular arrangement, that is, there are 3 rows of bosses, and the distance between the bosses is 2mm, the pits on the back of the convex plate of the cathode and anode plates are connected in series, the overlapping area is about 1 / 7 of the ellipse with a long diameter of 4.8mm and a short diameter of 4.6mm, the length of the distribution section of the anode plate is 28mm, and the length of the distribution section of the cathode plate is 22mm , the length of the pa...

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Abstract

The invention relates to a proton exchange membrane fuel cell metal bipolar plate, which consists of a cathode monopolar plate and an anode monopolar plate made of sheet metal, wherein a flow passage of the monopolar plates consists of a flow field flow passage, a distribution flow passage and an inlet-outlet passage, and the proton exchange membrane fuel cell metal bipolar plate is characterized in that the distribution flow passage is a point-like flow passage, the point-like flow passage consists of unconnected lug bosses raised towards the front side of the monopolar plates, the back sides of the lug bosses are provided with steel pits, the steel pit on the back side of the lug boss on the cathode monopolar plate is staggered with the steel pit on the back side of the lug boss on the anode monopolar plate, and the front part and the back part of the steel pits are overlapped relatively to form continuous water flow distribution flow passages which are connected in series. The proton exchange membrane fuel cell metal bipolar plate has the advantages of thin thickness for the manufactured bipolar plate, strict separation of fluid, good fluid distribution, light weight, simple processing and low processing cost; besides, the bipolar plate has high effective utilization area and good fluid resistance distribution evenness, and can satisfy the needs of different battery heat exchanges.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a metal bipolar plate of a proton exchange membrane fuel cell. Background technique [0002] In the prior art, the metal bipolar plate of the proton exchange membrane fuel cell is composed of a cathode unipolar plate and an anode unipolar plate made of thin metal plates. The front side of each unipolar plate is the cathode cavity and the anode cavity respectively, the back of each unipolar plate of the cathode plate and the anode plate is the cooling water cavity, and the back of each unipolar plate of the cathode plate and the anode plate is Both the front and back sides are provided with flow channels composed of concave-convex grooves. The concave-convex grooves on the front and back sides correspond to each other. The protrusions on the front are the grooves on the back. The upper surface of the front protrusions is on a plane The grooves on the front are the protrusions on the bac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M8/0258
CPCY02E60/50Y02P70/50
Inventor 傅云峰戚朋侯中军徐洪峰明平文肖亮
Owner SUNRISE POWER CO LTD
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