Fuel cell bipolar plate with controllable pressure difference between flow channels

A fuel cell and bipolar plate technology, applied in the direction of fuel cells, fuel cell parts, circuits, etc., can solve the problem of low utilization rate

Active Publication Date: 2020-02-28
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These disclosed flow channel designs adopt special-shaped structures in order to increase the reactant gas content in the membrane electrode. In practical applications, due to processing difficulty and loss, the utilization rate is not high.

Method used

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  • Fuel cell bipolar plate with controllable pressure difference between flow channels
  • Fuel cell bipolar plate with controllable pressure difference between flow channels
  • Fuel cell bipolar plate with controllable pressure difference between flow channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] A fuel cell bipolar plate with controllable pressure difference between flow channels, including a square gas flow channel field and several parallel "back" shaped ribs 2 arranged in parallel in the gas flow channel field, used to fix the holes 1 of the bipolar plate They are respectively located at the corners of the runner field, the inlet hole 3 of the inner runner is arranged on one side of the bipolar plate, the outlet hole 6 of the inner runner is arranged on the opposite side of the inlet hole 3 of the inner runner; the outer runner The air inlet hole 4 of the outer runner is arranged on the adjacent side of the inlet hole 3 of the inner runner, and the air outlet hole 5 of the outer runner is arranged on the opposite side of the inlet hole 4 of the outer runner. The several "back" shaped ribs 2 are evenly distributed in parallel in the gas flow channel field, each "back" shaped rib is a unit, the inside and outside of the "back" shaped rib form a double flow chan...

Embodiment 2

[0099] A fuel cell bipolar plate with controllable pressure difference between flow channels, including a square gas flow channel field and several parallel "back" shaped ribs 2 arranged in parallel in the gas flow channel field, used to fix the holes 1 of the bipolar plate They are respectively located at the corners of the runner field, the inlet hole 3 of the inner runner is arranged on one side of the bipolar plate, the outlet hole 6 of the inner runner is arranged on the opposite side of the inlet hole 3 of the inner runner; the outer runner The air inlet hole 4 of the outer runner is arranged on the adjacent side of the inlet hole 3 of the inner runner, and the air outlet hole 5 of the outer runner is arranged on the opposite side of the inlet hole 4 of the outer runner. The several "back" shaped ribs 2 are evenly distributed in parallel in the gas flow channel field, each "back" shaped rib is a unit, the inside and outside of the "back" shaped rib form a double flow chan...

Embodiment 3

[0104] A fuel cell bipolar plate with controllable pressure difference between flow channels, including a square gas flow channel field and several parallel "back" shaped ribs 2 arranged in parallel in the gas flow channel field, used to fix the holes 1 of the bipolar plate They are respectively located at the corners of the runner field, the inlet hole 3 of the inner runner is arranged on one side of the bipolar plate, the outlet hole 6 of the inner runner is arranged on the opposite side of the inlet hole 3 of the inner runner; the outer runner The air inlet hole 4 of the outer runner is arranged on the adjacent side of the inlet hole 3 of the inner runner, and the air outlet hole 5 of the outer runner is arranged on the opposite side of the inlet hole 4 of the outer runner. The several "back" shaped ribs 2 are evenly distributed in parallel in the gas flow channel field, each "back" shaped rib is a unit, the inside and outside of the "back" shaped rib form a double flow chan...

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Abstract

The invention belongs to the technical field of proton exchange membrane fuel cell flow channel design, and relates to a fuel cell bipolar plate with a controllable pressure difference between flow channels. The fuel cell bipolar plate includes a square gas flow field and a plurality of parallel square ribs arranged in parallel in the gas flow field. Holes for fixing the bipolar plate are locatedat the corners of the flow field. The gas inlet of an internal flow channel is disposed on a side of the bipolar plate. The gas outlet of the internal flow channel is disposed on the opposite side ofthe gas inlet of the internal flow channel. The gas inlet of an outer flow channel is disposed on the adjacent side of the gas inlet of the inner flow channel. The gas outlet of the outer flow channeldisposed on the opposite side of the gas inlet of the outer flow channel. The fuel cell bipolar plate promotes the drainage of a proton exchange membrane fuel cell electrode through a dual-channel combination in coopeation with different air pressures to improve a material transfer rate. The squeezing effect of different air pressures promotes the discharge of liquid water under the ribs of the membrane electrode to the flow channels and out of the cell with a gas to reduce water flooding, so that the membrane electrode has good conductivity and porosity.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cell flow channel design, and relates to a fuel cell bipolar plate, in particular to a fuel cell bipolar plate with controllable pressure difference between flow channels, which can provide different differential pressure to improve fuel cell performance. Background technique [0002] Due to its clean and efficient design concept, fuel cells are expected to become an important technical supplement to existing internal combustion engine power equipment. Among them, proton exchange membrane fuel cells using hydrogen and air as fuel have great commercialization prospects. In such fuel cells, the oxygen reduction reaction at the cathode has been the focus of scientific research due to its slow kinetic rate. The development of efficient catalysts can significantly increase the rate of the oxygen reduction reaction, but the faster electrochemical reaction generates more water in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258H01M8/0263H01M8/0206H01M8/0213
CPCH01M8/0258H01M8/0263H01M8/0206H01M8/0213Y02E60/50
Inventor 邢磊徐远翔施伟东
Owner JIANGSU UNIV
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