Fluid field plate with lyophilic and lyophobic passages in nesting arrangement

A technology of flow field plates and channels, which is applied to fuel cell parts, electrical components, battery electrodes, etc., can solve the problems of difficult separation of two-phase fluids, uneven distribution, and obstruction of the first fluid transportation, so as to improve the distribution Uniformity, reducing transport resistance, and improving work performance

Inactive Publication Date: 2013-12-04
DALIAN UNIV OF TECH
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Problems solved by technology

[0006] The present invention aims at problems such as the obstruction or uneven distribution of the first fluid caused by the accumulation of the second fluid in the flow field of the fuel cell or electrolytic cell, and the difficulty in the separation of the two-phase fluid, etc., and invents a nested arrangement of lyophilic channels and lyophobic channels The flow field plate realizes the orderly transportation and management of the two-phase fluid in the fuel cell or electrolytic cell

Method used

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  • Fluid field plate with lyophilic and lyophobic passages in nesting arrangement
  • Fluid field plate with lyophilic and lyophobic passages in nesting arrangement
  • Fluid field plate with lyophilic and lyophobic passages in nesting arrangement

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specific Embodiment approach 1

[0014] Specific implementation mode 1: In this embodiment, an anode flow field plate of a direct methanol fuel cell with nested arrangement of lyophilic channels and lyophobic channels is taken as an example. The flow field plate consists of a flow field plate body 1, a first fluid channel 3 for methanol solution transport, a second fluid channel 2 for carbon dioxide transport, a ridge 5 separating the first fluid channel and the second fluid channel, Methanol solution inlet 7, methanol solution outlet 4 and carbon dioxide outlet 6 are composed. The length, width, and thickness of the flow field plate are 40 mm, 40 mm, and 1.5 mm, respectively; the width of the first fluid channel 3 is 1.0 mm, and the depth is 0.4 mm; the width of the second fluid channel 2 is 0.5 mm, and the depth is 0.2 mm. mm. The sum of the projected areas of the first fluid channel and the second fluid channel in the normal direction of the flow field plane in contact with the MEA is 20% of the active ar...

specific Embodiment approach 2

[0016]Specific implementation mode 2: In this embodiment, a proton exchange membrane fuel cell cathode flow field plate with lyophilic channels and lyophobic channels nested in arrangement is taken as an example. The flow field plate consists of a flow field plate body 1, a first fluid channel 3 for oxygen transport, a second fluid channel 2 for liquid water transport, a ridge 5 separating the first fluid channel and the second fluid channel, Oxygen inlet 7, oxygen outlet 4 and liquid water outlet 6 are composed. The length, width, and thickness of the flow field plate are 40 mm, 40 mm, and 1.5 mm, respectively; the width of the first fluid channel 3 is 0.8 mm, and the depth is 0.3 mm; the width of the second fluid channel 2 is 0.4 mm, and the depth is 0.2 mm. mm. The sum of the projected areas of the first fluid channel and the second fluid channel in the normal direction of the flow field plane in contact with the MEA is 20% of the active area of ​​the MEA. In this embodim...

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Abstract

The invention belongs to the field of fuel cells and water electrolysis cells, relates to a fluid field plate with lyophilic and lyophobic passages in nesting arrangement, and is suitable for fluid field plate structures of proton exchange membrane fuel cells and electrolytic cells. The fluid field plate comprises a fluid field plate body, first and second fluid flow passages for air supply and fluid transport, and a ridge for separating the first fluid flow passage and the second fluid flow passage. The fluid field plate at least comprises one lyophilic passage and one lyophobic passage which are opposite to the surface of a membrane electrode assembly; the passages are arranged on the fluid field plate body in a mutually nesting manner and separated from each other through the ridge. The fluid field plate structure with the lyophilic and lyophobic passages in nesting arrangement, provided by the invention, has a remarkable split-phase transport effect on two-phase fluid, reduces the transport resistance of reactant and resultant in a fluid field, improves the distribution uniformity of reaction fluid and effectively improves the working performance of fuel cells or electrolytic cells.

Description

technical field [0001] The invention belongs to the field of fuel cells and water electrolysis cells, and relates to a flow field plate with nested arrangement of lyophilic channels and lyophobic channels, which is suitable for the flow field plate structure of proton exchange membrane fuel cells and electrolytic cells. Background technique [0002] Fuel cell is a kind of clean energy that directly converts chemical energy into electric energy. It has the advantages of high specific energy, high efficiency, clean and environmental protection, etc. It has broad application prospects in many fields of national economy. A fuel cell is mainly composed of a membrane electrode assembly (Membrane Electrode Assembly, MEA) and a pole plate. The MEA is the core area of ​​the electrochemical reaction of the fuel cell. It is usually composed of a proton exchange membrane and porous electrochemical electrodes on both sides; the plate has the dual functions of collecting current and distr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86
CPCY02E60/50
Inventor 梁军生李栋王光燕王大志张扬胡颉
Owner DALIAN UNIV OF TECH
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