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Fuel cell bipolar plate

A fuel cell and bipolar plate technology, applied in fuel cells, circuits, electrical components, etc., can solve the problem that the cooling water cannot be connected as a whole, so as to avoid the uncontrollable reaction gas pressure, improve the area utilization rate, and evenly distribute Effect

Pending Publication Date: 2019-07-09
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] According to the technical problem that the cooling water cannot be connected as a whole in the existing bipolar plates with discontinuous water channels, a fuel cell bipolar plate is provided

Method used

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Experimental program
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Effect test

Embodiment 1

[0049] Such as Figure 1-5 As shown, on the basis of the above technical solution, in this embodiment, the cathode plate 1 and the anode plate 2 are stamped from a 0.1 mm thick stainless steel sheet.

[0050] In this embodiment, the flow field structure in the distribution area has a branched flow field structure, flow channels are set in the flow field of the distribution area, and each flow channel period is branched to correspond to 1- 50 flow channel cycles; the flow field structure in the distribution area has discontinuities along the direction of fluid flow, and the discontinuity refers to changes in the flow field structure in its height direction; not all flow fields in the distribution area It is an intermittent boss and pit structure; each flow channel period includes a groove and a ridge;

[0051] Further, the flow fields in the distribution area of ​​the cathode plate 1 and the anode plate 2 are not all discontinuous bosses and pits, but can be continuous uninter...

Embodiment 2

[0068] The difference between this embodiment and Embodiment 1 is that in order to ensure the smooth flow of cooling water in the bipolar plate, in the cathode plate and the anode plate that make up the bipolar plate, the cooling water active area corresponding to one of the plates flows The flow channel in the field extends to the range covered by the flow field of the cooling water distribution area corresponding to the other plate, and is used for introducing cooling water.

[0069] Further, when the flow channel in the flow field of the cooling water active zone corresponding to one of the pole plates extends to the range covered by the flow field of the cooling water distribution zone corresponding to the other pole plate for introducing cooling water, the above flow The extension length of the channel is greater than or equal to one channel period of the flow field of the cooling water distribution area of ​​the other plate; The internal flow channel is connected to real...

Embodiment 3

[0072] In the fuel cell bipolar plate provided in this embodiment, the flow field in the distribution area corresponding to the cathode plate 1 and the anode plate 2 adopts a discontinuous convex platform and pit-like structure, and the cathode plate 1 or the anode plate 2 The flow channel in the flow field of the cooling water active area corresponding to the anode plate 2 extends to the range covered by the flow field of the cooling water distribution area corresponding to the other plate for introducing cooling water; or, the cathode plate 1 The flow channels in the cooling water active zone flow field corresponding to the anode plate 2 all extend to the range covered by the cooling water distribution zone flow field corresponding to the other polar plate, and the above-mentioned flow channels corresponding to the two polar plates The lengths of the channel extensions are not equal, and the above-mentioned flow channels with longer extension lengths are used to introduce coo...

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Abstract

The invention provides a fuel cell bipolar plate, comprising a cathode plate and an anode plate. The backs of the two plates are opposite to each other to form a bipolar plate, and a bipolar plate cooling water flow channel is formed between the two plates. The flow channel in the flow field of the cooling water active zone corresponding to one plate extends to the coverage of the flow field of the cooling water distribution zone corresponding to the other plate, in order to circulate the cooling water; or the flow channel in the flow field of the cooling water active zone corresponding to thecathode plate extends to the coverage of the flow field of the cooling water distribution zone corresponding to the anode plate, and the flow channel in the flow field of the cooling water active zone corresponding to the anode plate extends to the coverage of the flow field of the cooling water distribution zone corresponding to the cathode plate. The technical scheme of the invention solves theproblem that overall connection of cooling water cannot be realized in the existing bipolar plate with discontinuous water flow channels.

Description

technical field [0001] The invention relates to the field of proton exchange membrane fuel cells, in particular to a fuel cell bipolar plate. Background technique [0002] Fuel cell is a clean energy technology that directly converts chemical energy into electrical energy. It has the advantages of high energy conversion efficiency, simple structure, low emission, and low noise. In fuel cells, bipolar plates need to guide and distribute hydrogen and air to The electrochemical reaction occurs in the active area. At the same time, the flow field in the bipolar plate needs to guide the distribution of cooling water to circulate inside and outside the battery to take away the heat generated by the chemical reaction of the battery. Therefore, the structure of the bipolar plate needs to take into account air, hydrogen and cooling water flow paths, it is necessary to ensure that these three fluids pass through the inlet manifold, inlet distribution area, active area, outlet distribu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258H01M8/04029
CPCH01M8/04029H01M8/0258Y02E60/50
Inventor 程敏姜炜窦永香刘雪婷邢丹敏
Owner SUNRISE POWER CO LTD
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