Electric pile core structure of floating head type solid oxide fuel cell

Abstract

The invention discloses an electric pile core structure of a floating head type solid oxide fuel cell. The structure comprises a floating head end outer shell, a floating head, a fuel air outlet flange, a corrugated connecting pipe, a reactor core main body, a first shell connecting bolt, a floating head connecting bolt, a main outer shell, a fixed end outer shell, a fuel air inlet flange, a second shell connecting bolt, an air outlet flange and an air inlet flange. According to the floating head type SOFC electric pile, only one end of the tube plates is fixed to the shell, and the other endcan move relative to the shell. The floating head is composed of a floating tube plate and a floating head end cover, and a battery tube bundle and an electric pile shell are not restrained; when thebattery tube bundle is heated, the tube bundle and the floating head can freely stretch out and draw back along the axis, thereby completing eliminating the temperature difference stress. According tothe length of the electric pile tube bundle, middle spoilers can be arranged at certain intervals to play a role in supporting the tube bundle and guiding flow, and the floating head end is providedwith an anode gas flow guiding corrugated pipe to play a role in guiding flow and not constraining thermal expansion of an electric pile.

Description

technical field [0001] The invention relates to an electric stack core structure of a fuel cell, in particular to an electric stack core structure of a floating head type solid oxide fuel cell, and belongs to the technical field of battery application. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydropower, thermal power and atomic power. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the fuel cell uses fuel and oxygen as raw materials; at the same time There are no mechanical transmission parts, so there is no noise pollution, and the emission of harmful gases is very small. It can be seen that from the p...

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Problems solved by technology

[0003] The stack structure of solid oxide fuel cells (SOFC) is subject to the inconsistency of thermal expansion coefficients of different stack materials, resulting in a series of problems such as stack cracking failure and sealing failure, which seriously restrict the service life and power improvement of SOFC stacks. , Aiming at the above problems, a floating-head solid oxide fuel cell stack core structure is proposed

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