Flow field structure for improving effective area of bipolar plate waveform flow channel flow filed of fuel cell

A wave-shaped, flow channel technology, applied in the field of fuel cells, can solve problems such as reducing the power generation capacity of fuel cells

Active Publication Date: 2019-03-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These regions of weakened electrochemical reaction of the fuel cell reduce the power generation capacity of the fuel cell per unit area (and volume)

Method used

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  • Flow field structure for improving effective area of bipolar plate waveform flow channel flow filed of fuel cell
  • Flow field structure for improving effective area of bipolar plate waveform flow channel flow filed of fuel cell
  • Flow field structure for improving effective area of bipolar plate waveform flow channel flow filed of fuel cell

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Embodiment Construction

[0023] The flow field structure of the present invention for increasing the effective area of ​​the flow field of the corrugated flow channel of the bipolar plate of the fuel cell will be further specifically described below in conjunction with specific embodiments.

[0024] Such as figure 1 with figure 2 As shown, the wave-shaped channel flow field structure has a wave-shaped flow channel 5 composed of several parallel bosses 2 extending in a wave state in the flow field. The edge a of the flow field that is consistent with the extending direction of the boss is Straight line; the edge a does not meet with the adjacent boss b, forming several connected gaps X; the gap X is provided with a half-moon-shaped boss 13 suitable for the structure of the gap X; the bow of the half-moon-shaped boss 13 The side is close to the boss b, and the chord side is close to the edge a; there is a gap A14 between the chord side and the edge a; there is a gap B15 between the bow side and the boss...

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Abstract

The invention relates to a flow field structure for improving an effective area of a bipolar plate waveform flow channel flow filed of a fuel cell. A half-moon-like lug boss similar to the shape of awaveform flow channel and flow channels around the half-moon-like lug boss are arranged on electrochemical reaction weakening regions distributed at two sides of the waveform flow channel flow filed,so that each electrochemical reaction weakening region is provided with an electrochemical reaction with the same degree as a fuel cell main body flow field. The effective area of the bipolar plate waveform flow channel flow filed can be improved through the flow field structure, and the effective electrochemical reaction area is improved through reducing the electrochemical reaction weakening regions of each fuel cell. Although the ratio of the electrochemical reaction weakening regions in the flow field of the fuel cell is relatively low, since the fuel cell galvanic pile is formed by stacking dozens even hundreds of fuel cells, for one fuel cell galvanic pile, the increase in the effective area of electrochemical reaction of the fuel cell is considerable.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a flow field structure aimed at increasing the effective area of ​​the flow field of a wave-shaped flow channel of a bipolar plate of a fuel cell. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) relies on an electrochemical reaction to convert chemical energy stored in a fuel gas, such as hydrogen, directly into electricity. Proton exchange membrane fuel cell power generation has the characteristics of fast start-up at room temperature, high energy conversion efficiency, green and pollution-free exhaust gas, and safety. It can be used in fixed power stations, mobile power stations, aviation generators, marine generators, vehicle-mounted generators, and field emergency power supplies. , portable power supply, etc. At the end of 2014, Toyota officially released the passenger car Mirai using full-power proton exchange membrane fuel cells, officially op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0263
CPCH01M8/0263Y02E60/50
Inventor 艾军侯明郑利民邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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