Flat plate type moderate temperature solid oxide fuel battery pile connecting component

Abstract

The invention discloses a flat plate type moderate temperature solid electric battery oxide fuel battery pile connecting member characterized by that, a metal sheet is used to form a truncated cone with evenly distributed U-shape protrusion having the same bottom on the top and bottom surfaces, the top and bottom U-shape protrusion each includes a PEN board at the two sides of which air chambers are formed, superpose the enclosed double U-shape and the open double U-shape side faces of the PEN board each other at an angle of 90, forming an oxygen chamber and a combustion gas chamber, connection each PEN in series from the U-shape protrusion truncated cone to form the core of the battery pile, compact antioxidation passive metal is coated on the surface of the metal sheet.

Description

Technical field: [0001] The invention belongs to the technical field of fuel cells, in particular to connection parts of solid oxide fuel cell stacks. Background technique: [0002] The connection parts of flat-plate medium-temperature (operating temperature 500-800°C) solid oxide fuel cells are one of the key components that affect the performance of the stack (including output power density, service life, and cold-heat cycle performance). The connecting part between the two single cells has the functions of collecting electricity, connecting two adjacent single cells in series, and forming an oxygen chamber and a fuel gas chamber with the two single cells on both sides; one side of the connecting part is a strong oxidation The other side is strong reducing fuel gas; the design of connecting parts directly affects the sealing of the battery stack. Therefore, the connecting parts of flat-type intermediate temperature solid oxide fuel cells must have excellent electronic con...

AI Technical Summary

Problems solved by technology

[0003] In July 2001, the 13th International Conference on Solid State Ionics in Australia, "Summary of Papers", pointed out on page 103 that the medium temperature of solid oxide fuel cells made it possible to use iron-based stainless steel as the connecting material of the battery stack, but due to the iron-based stainless steel Oxidation and corrosion on the surface of the material will lead to an increase in the contact resistance with adjacent single cells

[0004] The existing iron-based stainless steel connecting parts have the following problems: 1) surface oxidation and corrosion make the contact resistance between the connecting parts and the electrodes of adjacent cells continuously increase; 2) during the heating or cooling process of the battery stack, due to The thermal mismatch between the connecting parts and the adjacent single cells, severe thermal stress occurs between the connecting parts and the adjacent single cells, resulting in the rupture of the single cells and the damage of the seal of the battery stack, resulting in a serious decline in the performance of the battery stack; 3) Iron-based stainless steel The evaporation of chromium alloy elements during use and deposition on the single cell will lead to a decrease in the performance of the single cell and the performance of the battery stack

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