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Glass sealing method for flat plate type solid oxide fuel cell

A solid oxide and fuel cell technology, applied in solid electrolyte fuel cells, fuel cell components, etc., can solve problems such as cracks in the sealing diaphragm, sealing failure, and high stress in the sealing diaphragm to reduce stress Effect

Inactive Publication Date: 2014-11-05
BEIJING STARGEN POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method needs to prepare a sealing diaphragm, and the sealing diaphragm will cause excessive stress due to its molding process, which will cause cracks in the sealing diaphragm during the sealing process, and then the sealing will fail

Method used

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  • Glass sealing method for flat plate type solid oxide fuel cell

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Embodiment Construction

[0021] In order to make the above objects, features and advantages of the invention more obvious and comprehensible, specific implementations of the invention will be described in detail below.

[0022] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0023] see figure 1 , is a schematic flow chart of a glass sealing method for a flat solid oxide fuel cell of the present invention. The flow process of the glass sealing method is as follows:

[0024] The first step: set the coefficient of thermal expansion to 10~12×10 -6 The / K glass powder is hollowly spread on the connecting body. The term "hollow tili...

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Abstract

The present invention provides a glass sealing method for a flat plate type solid oxide fuel cell. The process comprises the following steps: hollowly paving glass powder having a thermal expansion coefficient of 10-12*10<-6> / K on a connection body; placing a battery slice on the glass powder, such that the glass powder, the connection body and the battery slice form a member requiring sealing; heating the member requiring sealing to a temperature of 800-900 DEG C at a rate of 1-5 DEG C / min, and carrying out thermal insulation for 0.5-3 hours; cooling the member requiring sealing to a temperature of 400-600 DEG C at a rate of 0.1-1 DEG C / min, and carrying out thermal insulation for 0.5-5 hours; and naturally cooling to a room temperature. The method is simple. With the method of the preset invention, stress of the sealing interface can be effectively reduced, and sealing success rate can be improved.

Description

technical field [0001] The invention relates to a glass sealing method for a flat solid oxide fuel cell. Background technique [0002] Solid oxide fuel cell (SOFC) has become a hot spot in fuel cell research because of its high energy density. Among them, flat-plate solid oxide fuel cell has become the development trend of SOFC because of its high output power density and low manufacturing cost. The planar SOFC needs to be sealed to avoid the mixed explosion of fuel gas and oxidant gas, so as to prevent the failure of the cell operation. [0003] The traditional flat-plate SOFC glass sealing method is to use glass powder to prepare a sealing film of required thickness by film rolling or tape casting, and to bond the sealing film and the connecting body together through high temperature to form a sealing piece. This method needs to prepare a sealing diaphragm, and the sealing diaphragm will cause excessive stress due to its forming process, which will cause cracks in the sea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/02
CPCY02E60/521Y02E60/50
Inventor 韩冰朱怡彬成龙张峻赫
Owner BEIJING STARGEN POWER TECH
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