External airway type flat solid oxide fuel cell stack and assembling method

Abstract

The invention discloses an external airway type flat solid oxide fuel cell stack and an assembling method, the cell stack comprises a pedestal, a core having a cube structure which is alternatively stacked by the flat solid oxide fuel cell and a bipolar plate, external airway type air feeding side covers which are fit with the side surfaces of the core, and a top board which is arranged on the top of the core and is fastened with the pedestal by passing through a bolt, wherein a plurality of locating pieces are fixedly arranged on the positions corresponding to each air feeding side cover, the locating piece is contacted with the air feeding side cover in an inclined plane or an arc surface mode for applying the pressure, slide blocks are provided on the positions where the lower part of the top board corresponds to each air feeding side cover, the slide blocks are fixed on the top board by adjusting the bolt, and can perform an up-down movement along a guide rail by adjusting the bolt, then connected with the air feeding side cover in the inclined plane mode for applying the pressure. According to the invention, the problems that the pressurization mode of the air feeding side cover is not reliable and the sealing performance is insufficient can be solved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and more specifically relates to an external gas channel type flat solid oxide fuel cell stack and an assembly method thereof. Background technique [0002] A solid oxide fuel cell (SOFC) is an electrochemical device that works at a relatively high temperature (600°C~900°C), and generally consists of a porous anode, a dense electrolyte, and a porous cathode. At the working temperature, the anode and the cathode are respectively in the reducing atmosphere and the oxidizing atmosphere, the air will ionize in the cathode to generate oxygen ions, and under the action of chemical driving force, it will move towards the anode through the high temperature oxygen ion conductor electrolyte, and in the anode Reacts with reducing gases. Since the electrolyte is a pure oxygen ion conductor, electrons cannot pass through. In the above process, electrons are stripped from air molecules at the cathode and reach the a...

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Problems solved by technology

[0006] Aiming at the defects and technical requirements of the prior art, the purpose of the present invention is to provide an outer gas channel type flat solid oxide fuel cell stack and its assembly method, which can solve the problem of pressurization of the gas supply side cover in the prior art. The problem of unreliable method and insufficient sealing

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