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Fuel cell flow field plate and fuel cell

A fuel cell and flow field plate technology, which is applied in the direction of fuel cells, fuel cell components, circuits, etc., to achieve the effects of reducing concentration polarization, facilitating discharge, and enhancing heat exchange capacity

Pending Publication Date: 2020-12-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is still room for improvement in the existing flow field plate structure

Method used

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  • Fuel cell flow field plate and fuel cell
  • Fuel cell flow field plate and fuel cell
  • Fuel cell flow field plate and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a fuel cell flow field plate according to the present invention is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells, and the flow field plate is made of graphite material, including an air inlet, an air outlet, and a flow channel , ridges and bosses on either side of the runner. The air inlet and the air outlet are connected through flow channels on the flow field plate. The flow channel adopts parallel flow channel, the cross section of the flow channel adopts trapezoidal cross section, and the bosses on both sides of the flow channel adopt triangular bosses. When the flow field plate of the present invention is in operation, the gas is passed into the inlet 1, the gas moves and reacts along the flow channel 3, and reaches the gas outlet 2 to discharge unreacted gas and water generated by reaction. The 4 in the flow field plate 5 are ridges, and the ridges 4 and the flow channels 3 are alternately arranged to suppo...

Embodiment 2

[0035] Such as figure 2 As shown, a fuel cell flow field plate according to the present invention is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells, and the flow field plate is made of graphite material, including an air inlet, an air outlet, and a flow channel , ridges and bosses on either side of the runner. The air inlet and the air outlet are connected through flow channels on the flow field plate. The runner adopts a serpentine runner, the cross section of the runner adopts a trapezoidal cross section, and the bosses on both sides of the runner adopt rectangular bosses. When the flow field plate of the present invention is in operation, the gas is passed into the inlet 1, the gas moves and reacts along the flow channel 3, and reaches the gas outlet 2 to discharge unreacted gas and water generated by reaction. The 4 in the flow field plate 5 are ridges, and the ridges 4 and the flow channels 3 are alternately arranged to play the role of supp...

Embodiment 3

[0037] Such as image 3 As shown, a fuel cell flow field plate according to the present invention is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells, and the flow field plate is made of metal materials, including an air inlet, an air outlet, and a flow channel , ridges and bosses on either side of the runner. The air inlet and the air outlet are connected through flow channels on the flow field plate. The flow channel adopts a folded flow channel, the cross section of the flow channel adopts a trapezoidal cross section, and the bosses on both sides of the flow channel adopt triangular bosses. When the flow field plate of the present invention is in operation, the gas is passed into the inlet 1, the gas moves and reacts along the flow channel 3, and reaches the gas outlet 2 to discharge unreacted gas and water generated by reaction. The 4 in the flow field plate 5 are ridges, and the ridges 4 and the flow channels 3 are alternately arranged to suppo...

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Abstract

The invention provides a fuel cell flow field plate and a fuel cell, and relates to the field of fuel cells. The fuel cell flow field plate is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells. The fuel cell flow field plate comprises a gas inlet, a gas outlet, a flow channel, ridges and bosses on the ridges, wherein the bosses are distributed on the ridges on the two sides of the flow channel in the direction of the flow channel and penetrate through the whole flow channel. According to the fuel cell flow field plate and the fuel cell, the bosses are arranged on the wall faces of the two sides of the flow channel, the interface of liquid drops in the flow channel and the wall of the flow channel is divided, the effective contact area of the liquid drops and the wall of the flow channel is reduced, liquid water is prevented from forming a continuous water film, drainage of the liquid water is facilitated, and the water logging phenomenon is relieved; and due tothe existence of the boss structures, gas flow disturbance is enhanced, the convective heat exchange area is increased, and the mass transfer and heat exchange capacity of a flow field is improved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell flow field plate and a fuel cell. Background technique [0002] Hydrogen-air fuel cells use hydrogen as the reducing agent and oxygen as the oxidizing agent to realize the direct conversion of chemical energy to electrical energy through chemical reactions. Because it does not involve the conversion of heat energy, it does not need to follow the limit of the thermal efficiency of the Carnot cycle, so it can reach very high theoretical efficiency. In addition, fuel cells use fuel and oxygen as raw materials, and there are no mechanical transmission parts, so they are less noisy and emit less harmful gases. Therefore, hydrogen-air (oxygen) fuel cell is a promising power generation technology. The fuel cell bipolar plate is one of the core components of the fuel cell. The flow channel on the bipolar plate can evenly distribute the reactant gas to the reaction layer of the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258H01M8/026H01M8/0263H01M8/0206H01M8/0213
CPCH01M8/0206H01M8/0213H01M8/0258H01M8/026H01M8/0263Y02E60/50
Inventor 侯俊波章俊良高骞柯长春
Owner SHANGHAI JIAO TONG UNIV
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