Electric pile

Abstract

The invention relates to an electric pile. The electric pile comprises a plurality of solid oxide fuel cell units, and connectors arranged between the adjacent solid oxide fuel cell units. The electric pile adopts a cathode side air external airflow distribution mode, the connector comprises a cathode side provided with an air channel and an anode side provided with a fuel gas channel, the air channel comprises an air preheating area arranged in an air inlet area on the edge of the cathode side, and the air preheating area comprises a plurality of air inlet channels extending from the edge ofthe cathode side to the middle of the cathode side. An air preheating area is designed in an air inlet area on the cathode side of the electric pile; the area can be processed into a flow channel form; the number of the flow channels can be adjusted, the optimized battery electrode material, the battery structure and the high-thermal-conductivity metal connector material are matched, the preparedelectric pile can effectively conduct electric pile thermal management, the problem that the temperature difference between an inlet and an outlet is large when the electric pile operates under high power density or operates after long-term aging can be effectively solved, and the reliability of long-term use of the electric pile is effectively improved.

Description

Technical field [0001] The invention relates to the field of batteries, in particular to a solid oxide fuel cell stack. Background technique [0002] The solid oxide fuel cell (SOFC) stack is a high-efficiency electrochemical power generation device that directly converts chemical energy into electrical energy. [0003] When the traditional stack is working, the fuel gas passed in from the anode side and the air passed in from the cathode side undergo a high-temperature electrochemical reaction at the interface of the battery to convert it into electrical energy, realizing the efficient conversion of fuel chemical energy into electrical energy output. The existing stack structure is difficult to achieve high power density operation of the stack. The difficulty lies in the fact that the stack generates more heat during high power density operation, and the heat is discharged from the outlet to cause the stack to have a large temperature gradient and fail. On the other hand, as the ...

AI Technical Summary

Problems solved by technology

The existing electric stack structure is difficult to realize the high power density operation of the electric stack. The difficulty is that the high power density operation of the electric stack generates more heat, and the heat is discharged from the outlet, causing the electric stack to have a large temperature gradient and fail.

On the other hand, as the stack runs for a long time, the attenuation of the impedance will cause the stack to generate more and more heat, which will also bring more challenges to the thermal management of the stack.

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