A solid oxide fuel cell connector structure and assembly method thereof

A solid oxide and fuel cell technology, which is applied in fuel cells, circuits, electrical components, etc., can solve problems such as poor sealing integrity, poor joint sealing, and low reliability, and achieve accurate pressure application, reduced stiffness, and successful lifting rate effect

Active Publication Date: 2021-10-08
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems of poor sealing integrity of existing fuel cells, poor joint sealing, low efficiency and low reliability; the present invention provides a solid oxide fuel cell connector structure and an assembly method thereof, which can ensure that the fuel cell unit The completeness, sealing and reliability of the sealing of the battery sheet, and then ensure the power density of the battery stack, has the characteristics of simple structure, simple and convenient sealing, and high assembly efficiency

Method used

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  • A solid oxide fuel cell connector structure and assembly method thereof
  • A solid oxide fuel cell connector structure and assembly method thereof
  • A solid oxide fuel cell connector structure and assembly method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] combine figure 1 , figure 2 and image 3 , a structure of a solid oxide fuel cell connecting body 1, comprising a sealing protrusion 2 arranged on the connecting body 1, the connecting body 1 is also provided with a stress relief groove 3, and the stress relief groove 3 is sealed around the The outer side of the protrusion 2 is arranged; the stress relief groove 3 is provided with a connecting pipe 4 , and the connecting pipe 4 is used to connect the air guide hole 5 and the cavity enclosed by the sealing protrusion 2 .

[0046] Specifically, the sealing protrusion 2 is in a closed shape, and air guide holes 5 are provided on both sides of the connecting body 1 to provide fuel or oxidant for the fuel cell; the structural outline of the connecting body and the sealing protrusion 2 The cross-section can be one of square, rectangle, and other polygons, or the above shape with chamfered corners, or a circle or an ellipse. The inner side of the stress relief groove 3 is ...

Embodiment 2

[0059] combine Figure 4 , a method for assembling a solid oxide fuel cell connector and a single cell sheet, comprising the following steps:

[0060] The body of the connector 1 is obtained, and the sealing material 7 is covered on the upper end of the sealing protrusion 2 of the connector 1;

[0061] Cover the single cell sheet 8 on the sealing protrusion 2, so that the single cell sheet 8, the sealing protrusion 2 and the body of the connecting body 1 enclose a cavity;

[0062] Insert the two positioning pieces 9 into the stress relief grooves 3 on the opposite corners of the connecting body 1 to move the single cell 8 to the sealing position, wherein the stress relief grooves 3 are arranged on the connecting body 1 and surround the sealing body 1 Set up from the outside of the connection protrusion 2;

[0063] Place the pressing member 10 on the single cell sheet 8 to position the pressing member 10 by the positioning member 9;

[0064] The pressing member 10 and the co...

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Abstract

The present invention relates to the technical field of fuel cells, in particular to a structure of a solid oxide fuel cell connector and an assembly method thereof. The adopted technical solution is to include sealing protrusions and stress relief grooves arranged on the connector, the described A stress relief groove is arranged around the outer side of the sealing protrusion; a connecting pipe is arranged inside the stress relief groove, and the connecting pipe is used to connect the cavity surrounded by the air guide hole and the sealing protrusion. The present invention reduces the structural rigidity of the sealing protrusion and increases the structural flexibility of the sealing protrusion by setting the stress relief groove, reduces the tensile stress generated by the connecting body on the battery sheet, and prevents the single cell from being broken or the sealing joint from cracking or even Fatigue fracture, ultimately ensuring the stability of the sealing airtightness, the safety and economy of the battery stack; the stress relief groove can be used as a positioning groove when assembling and sealing, so as to realize the sealing process of the battery sheet through the positioning piece. The precise assembly and precise pressure application ensure the sealing integrity and joint sealing of single cells.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a solid oxide fuel cell connecting body structure and an assembling method thereof. Background technique [0002] The structural rigidity of the traditional flat-type solid oxide fuel cell connector (metal) is large, and the thermal expansion coefficient of the connector and the single cell (ceramic) is quite different. Large tensile stress, especially in the cycle process, will generate cyclic thermal stress, which will lead to broken single cells or cracks (fatigue fractures) in the sealing joints. It is difficult to ensure the stability of air tightness, which will seriously affect the safety of the battery stack. sex and economy. In addition, the current connector structure and the battery sheet are difficult to achieve precise assembly and precise pressure application during the sealing process, which will affect the sealing integrity and joint sealing performance of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0271
CPCH01M8/0271Y02E60/50
Inventor 王治国王泽明侯蔼麟樊宝全王世忠刘晓珍易伟
Owner NUCLEAR POWER INSTITUTE OF CHINA
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