A solid oxide fuel cell cathode gas flow field plate and its preparation method

A fuel cell cathode and solid oxide technology, which is applied in the direction of fuel cells, fuel cell parts, electrical components, etc., can solve the problems of large gas pressure drop and low fuel utilization rate, and overcome the large gas pressure drop and reduce the The effect of high contact resistance and product pass rate
CN104253280BActive Publication Date: 2017-01-25HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2017-01-25

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Abstract

The invention discloses a solid-oxide-fuel-cell cathode gas flow field plate which is used to uniformly distribute an oxidation gas and collect cathode current. The cathode gas flow field plate is formed by multiple tooth-shaped ripple blocks which are in parallel connection and have same dimension, each tooth-shaped ripple block is formed by two tooth-shaped ripple strips (3 and 4) which are in parallel arrayed connection after being staggered at a distance (7), each tooth-shaped ripple strip (3 and 4) is formed by multiple flat-top bosses (2) and flat plates (1) which are in alternate connection, each flat-top boss (2) has a tooth-shaped contour, the flat plates (1) are connected with the root parts of the flat-top bosses (2) to form tooth-shaped ripples, and the cross section of each flat-top boss (2) has a shape same to the shape of an isosceles trapezoid without a bottom edge. The cathode gas flow field plate of a fuel cell is capable of overcoming the problems that a conventional flow field is large in gas pressure reduction and low in fuel utilization rate. By employing a roll forming technology for preparing the flow field plate, the flow field plate is simple in technology, can be precisely formed and high in product qualified rate.
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Description

technical field

[0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a solid oxide fuel cell cathode gas flow field plate and a preparation method thereof by roll forming. Background technique

[0002] With the development of anode-supported solid oxide fuel cells (SOFC for short), the continuous development of new electrode and electrolyte materials and the thinning of its electrolyte, the operating temperature of SOFC is gradually reduced, and low-cost heat-resistant alloy materials are used as SOFC connections. bulk materials are possible. In the planar SOFC stack, the connector plays the role of supporting the battery, collecting current, and separating fuel gas and oxidant gas. Flow channels are usually designed on the cathode gas flow field plate of the connecting body. The flow channels can not only improve the uniformity of gas flow distribution in the battery stack, but also promote mass transfer and heat transfer in the s...

Claims

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