IT-SOFC (Intermediate Temperature Solid Oxide Fuel Cell) stack alloy connecting body and connecting method of cell stack

Abstract

The invention relates to an IT-SOFC (Intermediate Temperature Solid Oxide Fuel Cell) stack alloy connecting body and a connecting method of a cell stack. Alloy specifications with two different components of an anode chamber connecting body and a cathode chamber connecting body are adopted, and the pertinence on corrosion resistance of the connecting bodies is higher due to a specification difference of the anode and cathode alloy connecting bodies, so that the service life of the solid oxide fuel cell stack is prolonged. The alloy connecting body designed by a sheet through groove is arranged between every two single cells, so that the machining forming cost of the alloy connecting bodies is lowered. The invention further provides a parallel electricity connection method of the connecting bodies in the cell stack. According to the IT-SOFC stack alloy connecting body and the connecting method, the service lives of the alloy connecting bodies in the cell stack are prolonged, and the manufacturing economy and the operation stability of the cell stack are improved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and provides a method for designing a medium-low temperature flat solid oxide fuel cell stack alloy connector. Background technique [0002] The connecting body connects each single cell in the medium and low temperature flat solid oxide fuel cell stack, and its function is to export the current generated by the battery and concentrate it to the solid oxide fuel cell system to supply power for users. The design of the connector includes three aspects: the component design of the connector, the processing technology and shape design, and the design of the electrical connection method of the connector. [0003] Due to the development of the operating temperature of the flat solid oxide fuel cell stack to medium and low temperatures, the economy and ease of processing compared with the original ceramic connector, and the expected corrosion resistance, the alloy connector is used in the solid oxid...

AI Technical Summary

Problems solved by technology

[0016] (2) One of the functions of the alloy connector is to isolate the reducing atmosphere of the anode chamber and the oxidizing atmosphere of the cathode chamber. The gas grooves of the flow fields on both sides can only be semi-open flow grooves, which are difficult to machine and cost relatively high. high

[0022] (2) There is a lack of connector composition design, and the design of connector components is the key to ensure the life of the connector

[0032] Even though it is recognized that the influence of different atmospheres on the corrosion pathways of alloy connectors is very different, and even conflicting corrosion resistance requirements arise from this, the current research on the design of alloy connectors mainly focuses on the change of composition design, and does not focus on alloy connectors. Connectors are designed as anode chamber connectors and cathode chamber connectors respectively, and the connectors are developed more specifically; at the same time, controlling the machining cost of the alloy connectors and overcoming the weakness of the series design also require new alloys for flat-plate stacks connector design

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