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Bipolar plate structure of proton exchange membrane fuel cell, fuel cell stack and control method thereof

A technology of fuel cell stacks and proton exchange membranes, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems affecting fuel cell power generation performance, stability, service life, and preload distribution Uniformity, complex battery design and other issues, to achieve the effect of reducing process complexity and stack manufacturing costs, improving uniformity, and realizing lightweight design

Pending Publication Date: 2018-01-05
南京攀峰赛奥能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to solve the cold start of fuel cells, researchers tend to embed electric heating elements between the single cell and the plate. This method solves the problem of cold start of fuel cells and makes the design of the battery easier more complicated
[0005] In addition, the deformation of the fuel cell end plate caused by various vibration and shock loads during the operation of the fuel cell, and the deformation of the end plate under the action of the internal preload of the stack will seriously affect the internal preload of the fuel cell stack. The uniformity of distribution affects the basic power generation performance, stability and service life of fuel cells

Method used

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  • Bipolar plate structure of proton exchange membrane fuel cell, fuel cell stack and control method thereof
  • Bipolar plate structure of proton exchange membrane fuel cell, fuel cell stack and control method thereof
  • Bipolar plate structure of proton exchange membrane fuel cell, fuel cell stack and control method thereof

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Embodiment 1

[0058] A 50-section fuel cell stack was assembled using the novel fuel cell stack design of the present invention, and a performance comparison test was performed with a conventional air-cooled fuel cell stack under the same environmental conditions. Both fuel cell stacks have a single cell with an active area of ​​150 cm 2 , the hydrogen flow fields are all parallel flow fields, the groove depth of the hydrogen flow field is 0.3mm, the groove width is 1.0mm, the ridge width is 1.0mm, the air flow field is 2.5mm in groove width, and the ridge width is 2.0mm, the coolant is water, the shape of the cross-section of the coolant flow field is a circular arc composed of a sub-arc and a line segment, and the area of ​​the cross-section is 1.3mm 2 , the ridge width is 1.5mm, and the coolant flow channel groove 32 is embedded in the air flow channel groove 30 in the novel fuel cell stack of the present invention, so that the cross section of the air flow channel groove 30 is periodica...

Embodiment 2

[0067] A 50-section fuel cell stack was assembled using the novel fuel cell stack design of the present invention, and a performance comparison test was performed with a conventional air-cooled fuel cell stack under the same environmental conditions. Both fuel cell stacks have a single cell with an active area of ​​190 cm 2 , the hydrogen flow fields are all parallel flow fields, the groove depth of the hydrogen flow field is 0.5mm, the groove width is 0.5mm, the ridge width is 1.2mm, the air flow field is 3.5mm in groove width, and the ridge width is 1.5mm, the coolant is water, the shape of the cross-section of the coolant flow field is a circular arc composed of a sub-arc and a line segment, and the area of ​​the cross-section is 0.3mm 2 , the ridge width is 1.2mm, the cooling liquid flow channel groove 32 is embedded in the air flow channel groove 30 in the novel fuel cell stack of the present invention, so that the cross section of the air flow channel groove 30 is period...

Embodiment 3

[0070] A 50-section fuel cell stack was assembled using the novel fuel cell stack design of the present invention, and a performance comparison test was performed with a conventional air-cooled fuel cell stack under the same environmental conditions. Both fuel cell stacks have a single cell with an active area of ​​160 cm 2 , the hydrogen flow fields are all parallel flow fields, the groove depth of the hydrogen flow field is 0.4mm, the groove width is 1.5mm, the ridge width is 0.7mm, the air flow field is 2.2mm in groove width, and the ridge width is 1.8mm, the coolant is water, the shape of the cross-section of the coolant flow field is a circular arc composed of a sub-arc and a line segment, and the area of ​​the cross-section is 0.8mm 2 , the ridge width is 1.1 mm, and the coolant flow channel groove 32 is embedded in the air flow channel groove 30 in the novel fuel cell stack of the present invention, so that the cross section of the air flow channel groove 30 is periodic...

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Abstract

The invention relates to a bipolar plate structure of a proton exchange membrane fuel cell, a fuel cell stack and a control method thereof, and belongs to the technical field of proton exchange membrane fuel cells. By use of an air cooling and liquid cooling integration bipolar plate, an auxiliary cooling system is simplified, and the uniformity of temperature distribution in the stack is improved; meanwhile, quick cold starting under a low temperature condition is easy to realize; by introduction of graphene into a bipolar plate material, the conductivity of the bipolar plate can be improved;a runner of a cathode plate flow field adopts a periodical gradual-change section, so that oxygen partial pressure on the surface of a three-phase reaction region can be increased; a porous gas diffusion layer has the gradient dewatering capacity in the gas flowing direction, so that the stability of the fuel cell stack is improved; a cathode reinforcing layer of a porous meshed structure is relatively high in intensity, relatively high in conductivity and excellent in corrosion resistance; the power and the stability of the stack are improved, and the service life of the stack is prolonged.

Description

technical field [0001] The invention relates to a bipolar plate structure of a proton exchange membrane fuel cell, a fuel cell stack and a control method thereof, and belongs to the technical field of proton exchange membrane fuel cells. Background technique [0002] Proton exchange membrane fuel cell (proton exchangemembrane fuel cell, PEMFC) is an electrochemical power generation device that directly converts chemical energy in fuel into electrical energy without combustion. Fast, high energy conversion efficiency, wide fuel source, fast fuel supply, wide application range and other characteristics have attracted widespread attention. [0003] A fuel cell is essentially an open energy conversion device for triple production of electricity, heat, and water. Its working method is similar to that of an internal combustion engine, and its working principle is similar to that of a chemical power source. The PEMFC stack emits a large amount of heat energy while generating ele...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M8/0213H01M8/0226H01M8/0265H01M8/04007H01M8/04029H01M8/04225H01M8/04701H01M8/2483
CPCY02E60/50
Inventor 陈莉周嵬王洁
Owner 南京攀峰赛奥能源科技有限公司
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