Shell sealing structure of high-pressure solid oxide fuel stack

By employing a combination of wedge-shaped sealing blocks and sealing cotton in the high-pressure solid oxide fuel cell stack casing, a good sealing effect under high pressure is achieved, and the stack casing can be reused, solving the high-pressure sealing problem and reducing operation and maintenance costs.

CN224554339UActive Publication Date: 2026-07-24SHANDONG ENERGY GRP CO LTD +3
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Patent Information

Application Number
CN202521720334.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-13
Publication Date
2026-07-24
Estimated Expiration
2035-08-13

AI Technical Summary

Technical Problem

The existing high-pressure solid oxide fuel cell stacks have a sealing structure that is difficult to meet high-pressure requirements, resulting in a high leakage rate, which affects the performance and lifespan of the stack. At the same time, welded stacks are difficult to maintain, increasing operation and maintenance costs.

Method used

It adopts a combination structure of wedge-shaped sealing block and sealing cotton. The sealing is achieved by the wedge-shaped sealing block being squeezed laterally under high pressure. Combined with the detachable design, it is suitable for working pressure of 5-50 bar and can be reused.

Benefits of technology

It improves sealing performance, reduces leakage rate, enhances fuel cell stack performance and lifespan, and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model discloses a high-pressure solid oxide fuel stack shell sealing structure, which relates to the technical field of solid oxide fuel cells, and is characterized in that a stack bottom plate is arranged at the bottom of a stack, a shell is arranged at the side part of the stack, an upper groove for mounting a stack top plate is formed in the outer side of the top, and an upper sealing structure is arranged in the upper groove; the upper sealing cotton, the first upper sealing block and the second upper sealing block in the upper sealing structure are sequentially arranged in the upper groove from top to bottom, and after the upper sealing cotton is pressed, the shell is transversely extruded and sealed through the first upper sealing block or the second upper sealing block with the inclined contact face. Due to the fact that the wedge-shaped sealing ring is adopted in the upper sealing structure in the shell of the galvanic pile, the higher the working pressure of the galvanic pile is, the higher the sealing effect is, the galvanic pile can be suitable for the working pressure of 5-50 bar, the upper sealing structure is detachably connected with the shell and can be repeatedly used, and the use cost is reduced.
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