Solid oxide fuel cell stack

Abstract

The invention discloses a solid oxide fuel cell stack comprising end boards and a repeating unit, the end boards comprise a front board and a rear board, and the repeating unit is arranged between the two end boards; the repeating unit is composed of a connection piece, a sealing piece, an air passage board and a cell piece; the connection piece comprises a partition board, an anode support piece, a cathode support board and a cell piece support board; and a single cell voltage outgoing point is also arranged on the repeating unit. The solid oxide fuel cell stack has the advantages that 1, output power of the cell stack can be significantly improved, service life of the cell stack is long; 2, the novel sealing material and structure are used, so that leakproofness of the cell stack can be increased, and service life of the cell stack can be effectively ensured; 3, the novel structure material and coating are used, so that attenuating property of the cell stack is reduced, and thermal cycling time of the cell stack is improved; 4, a light-weight design structure is used, so that power density of the cell stack is improved; and 5, abundant interfaces are provided, and the cell stack can be monitored in real time.

Description

technical field [0001] The invention relates to fuel cell technology, in particular to a solid oxide fuel cell stack. Background technique [0002] Solid Oxide Fuel Cell (SOFC) is a high temperature fuel cell with an operating temperature of 500-1000°C. Due to the high working temperature, SOFC can directly use hydrocarbons converted from fossil energy and biomass energy as fuel, and convert chemical energy into electrical energy efficiently through external or internal reforming reactions and electrochemical reactions in electrodes. Compared with other fuel cells, SOFC has the advantages of all solid-state devices, flexible fuel, no need for expensive catalysts, and cogeneration of heat and power, but there are also some new challenges. [0003] The key component of SOFC is the unit cell. Several single cells are connected in series and parallel to form a battery stack. SOFC stacks have various structural designs, and currently there are mainly two structures: tubular and ...

AI Technical Summary

Problems solved by technology

However, the uniform stress distribution and gas sealing of large-area cells are difficult problems for plate structures.

In the flat structure, the three-in-one battery assembly is a flat structure, while in the corrugated structure battery, the three-in-one battery assembly is corrugated or corrugated, which increases the battery reaction area, so it has higher power density. However, the preparation of three-in-one components is relatively difficult

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