A solid oxide fuel cell connector and stack

Abstract

The invention discloses a connection body of a solid oxide fuel cell, which comprises a cathode plate, an anode plate and a sealed intermediate layer arranged between the cathode plate and the anode plate, and a high-temperature heat pipe is arranged in the sealed intermediate layer; the high-temperature heat pipe Including capillary and working medium. The solid oxide fuel cell connector of the present invention is designed with an embedded heat pipe, which can reduce the temperature gradient inside the solid oxide fuel cell stack, optimize the thermal management efficiency of the stack, and improve the ability of the stack to withstand rapid temperature rise. The invention also discloses a solid oxide fuel electric stack. The electric stack in the present invention includes a connecting body of a high-temperature heat pipe, which can withstand a relatively high temperature rise rate and reduce the temperature gradient during operation, so that the electric stack system can be rapidly Start by heating up, reduce the temperature gradient and thermal stress during the heating and cooling of the stack and normal operation, and expand the application field of SOFC.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, in particular to a solid oxide fuel cell connector and an electric stack. Background technique [0002] At present, metal connectors have been widely used in medium-temperature (650-800°C) solid oxide fuel cell stacks. Although the thermal conductivity of metal connectors is higher than that of ceramic connectors, in order to make the stack work safely, the intake air needs to pass through the outside. The heat balance system is preheated to about 700°C before entering the electric stack. At the same time, due to the large amount of heat generated by the electric stack, a large amount of air needs to be introduced to cool down. And during long-term operation, especially for large-size batteries or high power density operation, the temperature gradient in the battery reaction area in the stack will become larger and larger, even reaching a temperature difference of more than 150°C, resulting in thermal s...

AI Technical Summary

Problems solved by technology

This design does not consider the thermal management of the intake part of the stack. The stack still needs an external heat exchange system. It is necessary to extend the connecting body part embedded in the heat pipe to the outside of the stack to achieve cooling through external gas heat exchange. The extended part causes the stack There are potential safety hazards, the shape of the stack is irregular, and the extended connector part of the stack will be deformed and bent due to high temperature creep during long-term operation of the stack, which is not conducive to the safety of the stack

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