PEMFC (proton exchange membrane fuel cell) metal bipolar plate conducive to improving fluid distribution

A technology of proton exchange membrane and metal bipolar plate, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of difficult to realize the precise positioning of the stack, unfavorable water and gas tail gas removal, and the distribution head is limited to the gas flow field, etc. , to achieve the effect of simplifying internal water management, avoiding distortion and reducing resistance
CN102306805AActive Publication Date: 2012-01-04SUNRISE POWER CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUNRISE POWER CO LTD
Publication Date
2012-01-04

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Abstract

The invention provides a PEMFC (proton exchange membrane fuel cell) metal bipolar plate conducive to improving fluid distribution. The PEMFC metal bipolar plate comprises a cathode monopolar plate and an anode monopolar plate in corresponding connection, wherein three-cavity public pipelines are arranged on the two sides of the cathode and anode monopolar plates, and a direct current field flow channel, a distribution flow channel and an inlet / outlet flow channel are arranged in the middle;; the direct current field flow channel is formed by bulges and grooves in parallel; the distribution flow channel is formed by channelization islands distributed regularly and reversely-convex support points; the inlet side and outlet side of the cathode and anode monopolar plates are asymmetrical; andthe inlet area of an air cavity public pipeline is 0.1-0.5 time greater than the outlet area. The metal bipolar plate has the advantages that: the distribution flow channel improves the distribution conditions of reaction gas and cryogen, and thus can improve the galvanic pile performance and optimize the galvanic pile water management capacity; the inlets and outlets of three cavities are asymmetrical, thereby saving space to the greatest degree; an assembled galvanic pile is suitable for the operations of horizontally, laterally and vertically placing the galvanic pile; and the outer positioning in battery pile assembly can avoid torsion and deformation of the battery pile, thereby improving the flatness of the battery pile.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells, in particular to a metal bipolar plate of a proton exchange membrane fuel cell. Background technique

[0002] Proton exchange membrane fuel cell (PEMFC) has attracted widespread attention due to its high efficiency, energy saving, environmental protection, safety and other characteristics, and is considered to be the preferred power system to replace the internal combustion engine. The bipolar plate is a key component of PEMFC. It not only significantly affects the performance of PEMFC, but also accounts for 70%-80% of the weight of the stack and more than 45% of the cost. Therefore, the development of light and thin bipolar plates that are easy to achieve large-scale production is of great significance for improving the specific power of the stack, reducing production costs, and promoting the commercialization of PEMFC.

[0003] The current materials for preparing bipolar plates mainly inclu...

Claims

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