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Flat fuel cell flexible seal device and brazing technology thereof

A fuel cell, flexible sealing technology, applied in fuel cells, fuel cell parts, water-based electrolyte fuel cells, etc., can solve problems such as insufficient research, achieve good reliability, low production cost, and eliminate thermal stress.

Active Publication Date: 2012-07-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, the relevant research is not enough, still in the exploratory stage

Method used

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  • Flat fuel cell flexible seal device and brazing technology thereof
  • Flat fuel cell flexible seal device and brazing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Refer to attached figure 1 :

[0026] The flat fuel cell flexible sealing device is composed of a bipolar plate 2 , a PEN structure 3 , a Z-shaped sealing metal 5 and a metal frame 7 . A Z-shaped sealing metal 5 is inserted between the PEN structure 3 and the metal frame 7. The Z-shaped sealing metal 5 has a uniform thickness of 120 μm, the upper and lower planes are parallel, and the middle vertical part is spring-shaped. They are connected by a circular arc transition, and the transition arc angle of the connection is 90°. The upper and lower planes are rectangular flat plates with a certain width and length, and the length is 2 mm. The upper plane is directly opposite to the PEN structure 3, and the silver-based solder 4 is placed between the two, and the lower plane is directly opposed to the metal frame 7, and the nickel-based solder 6 is placed between the two. The silver-based solder 4 is AgCuO, which contains 4% CuO, and has a thickness of 90 μm. Nickel-base...

Embodiment 2

[0029] The flat fuel cell flexible sealing device is composed of a bipolar plate 2 , a PEN structure 3 , a Z-shaped sealing metal 5 and a metal frame 7 . Insert a Z-shaped sealing metal 5 between the PEN structure 3 and the metal frame 7. The Z-shaped sealing metal 5 has a uniform thickness of 140 μm. The upper and lower planes are parallel, and the middle vertical part is spring-shaped. They are connected by a circular arc transition, and the transition arc angle of the connection is 90°. The upper and lower planes are rectangular flat plates with a certain width and length, and the length is 4mm. The upper plane is directly opposite to the PEN structure 3, and the silver-based solder 4 is placed between the two, and the lower plane is directly opposed to the metal frame 7, and the nickel-based solder 6 is placed between the two. The silver-based solder 4 is AgCuO, which contains 4% CuO, and has a thickness of 100 μm. Nickel-based solder 6 is BNi 2 , with a thickness of 90...

Embodiment 3

[0032] The flat fuel cell flexible sealing device is composed of a bipolar plate 2 , a PEN structure 3 , a Z-shaped sealing metal 5 and a metal frame 7 . Insert a Z-shaped sealing metal 5 between the PEN structure 3 and the metal frame 7. The Z-shaped sealing metal 5 has a uniform thickness of 160 μm. The upper and lower planes are parallel, and the middle vertical part is spring-shaped. They are connected by a circular arc transition, and the transition arc angle of the connection is 90°. The upper and lower planes are rectangular flat plates with a certain width and length, and the length is 6mm. The upper plane is directly opposite to the PEN structure 3, and the silver-based solder 4 is placed between the two, and the lower plane is directly opposed to the metal frame 7, and the nickel-based solder 6 is placed between the two. The silver-based solder 4 is AgCuO, which contains 4% CuO, and has a thickness of 120 μm. Nickel-based solder 6 is BNi 2 , with a thickness of 10...

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Abstract

The invention discloses a flat fuel cell flexible sealing device and a brazing technology thereof. The invention belongs to the solid oxide fuel cell technical field, in particular related to a flat fuel cell flexible sealing device and the brazing technology. The invention is characterized in that a Z-shaped seal metal (5) is inserted between a PEN structure (3) and a metal frame (7), the upper and the lower planes of the Z-shaped seal metal (5) are in parallel and the middle vertical part of the seal metal (5) is spring-shaped. In brazing process, the well-spliced sealing device is clamped tightly by a clamp and put into a brazing furnace, slowly heated up to 1050 degrees Celsius and preserved for 40 minutes, and then slowly cooled down to be under room temperature. In the invention, the sealing device has simple structure, low cost and good reliability; seal material is allowed for plastic deformation, helpful for absorption and elimination of heat stress produced by temperature change and for improvement of SOFC cell stack working reliability.

Description

technical field [0001] A flexible sealing device for a flat-plate fuel cell and a brazing process thereof belong to the technical field of solid oxide fuel cells, and in particular relate to a flexible sealing device for a flat-plate fuel cell and a brazing process thereof. Background technique [0002] A fuel cell is an energy conversion device that directly converts chemical energy stored in fuel and oxidant into electrical energy. A fuel cell is different from a conventional battery in that its fuel and oxidant are not stored inside the battery, but in tanks outside the battery. When it works, it needs to continuously input fuel and oxidant into the battery and discharge the reaction products at the same time. Both the fuel and the oxidant used in the fuel cell are fluids (ie gas and liquid). The most commonly used fuels are pure hydrogen, various hydrogen-containing gases and certain liquids (such as aqueous methanol). Commonly used oxidants are gases such as pure oxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/08B23K1/008H01M8/028
CPCY02E60/50Y02P70/50
Inventor 蒋文春王振波高嵩孙伟松冯晓亮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)