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

Active Publication Date: 2017-01-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a solid oxide fuel cell cathode gas flow field plate and its preparation method, the purpose of which is to provide a cathode flow field plate with a flow field design that can To overcome the problems of large gas pressure drop and low fuel utilization in the common serpentine flow field, parallel flow field, and improved parallel flow field, the roll forming process is adopted. The process is simple and can be precisely formed. The product High pass rate

Method used

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

Examples

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Embodiment 1

[0043] S1: Design and process the rolling wheel, wherein, according to the point-to-point mapping from the flat plate to the rolling wheel circumference, design a pair of active rolling wheels and driven rolling wheels that can engage with each other, and assemble them in a fixed place after processing On the rolling mill of the above-mentioned pair of rolling wheels, the surface of the pair of rolling wheels has a punch and a die that are precisely matched when they are engaged with each other, and the punch of the driving rolling wheel matches the die of the driven rolling wheel. When the two are engaged, the metal sheet to be processed is plastically deformed to obtain a flat-topped boss with a corrugated tooth shape;

[0044] S2: Adjust the gap between the active rolling wheel and the driven rolling wheel according to the thickness of the metal sheet to be processed. The gap is the top surface 5 of the punch and the bottom surface 6 of the die when the pair of rolling wheel...

Embodiment 2

[0049] This embodiment is the same as Embodiment 1, the difference is:

[0050] In step S2, a metal copper plate with a thickness of 0.5 mm is used as a thin metal plate to be processed to prepare a fuel cell cathode gas flow field plate, and the gap is adjusted to 0.5 mm to obtain a copper fuel cell cathode gas flow field plate.

Embodiment 3

[0052] This embodiment is the same as Embodiment 1, the difference is:

[0053] In step S2, a metal aluminum plate with a thickness of 0.6 mm is used as a thin metal plate to be processed to prepare a solid oxide fuel cell cathode gas flow field plate, and the gap is adjusted to 0.6 mm to obtain an aluminum fuel cell cathode gas flow field plate.

[0054] Figure 4 It is a schematic diagram of the processing state of a pair of rolling wheels in the embodiment of the present invention, specifically the schematic diagram of the processing state of embodiment 1. Feed the metal sheet to be processed to a pair of rolling wheels along the fixed track (not shown in the figure), and the metal sheet is deformed and then sent out from the other side of the pair of rolling wheels to obtain the cathode gas of the fuel cell in the present invention. Flow field plate.

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0258B21D13/04H01M8/026
CPCB21D13/04H01M8/0258H01M8/026H01M8/0263H01M2008/1293Y02E60/50Y02P70/50
Inventor 李箭李凯颜冬贾礼超王欣
Owner HUAZHONG UNIV OF SCI & TECH
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