Fuel cell system taking solid-state stored hydrogen as hydrogen source and starting method

Abstract

The invention relates to a fuel cell system taking solid-state stored hydrogen as a hydrogen source. The fuel cell system comprises a fuel cell, a first hydrogen storage device, a second hydrogen storage device, a heat supply module and a heat exchange module; the first hydrogen storage device comprises a hydrogen temporary storage tank and a first hydrogen supply pipeline, one end of the first hydrogen supply pipeline is communicated with an outlet of the hydrogen temporary storage tank, and the other end of the first hydrogen supply pipeline is communicated with a hydrogen inlet of the fuel cell; the second hydrogen storage device comprises a solid hydrogen storage tank, a second hydrogen supply pipeline and a heat transfer piece; one end of the second hydrogen supply pipeline is communicated with the outlet of the solid hydrogen storage tank, and the other end of the second hydrogen supply pipeline is communicated with the first hydrogen supply pipeline; the heat transfer piece is arranged in the solid hydrogen storage tank; the heat supply module is electrically connected with the fuel cell and is communicated with the heat transfer piece, and the heat supply module can provide heat for the heat transfer piece; and the heat exchange module is electrically connected with the fuel cell, is arranged between the fuel cell and the solid hydrogen storage tank, and can provide waste heat generated by working of the fuel cell to the solid hydrogen storage tank so as to perform heating and hydrogen supply. The system disclosed by the invention can be started at a relatively low temperature.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell system and a start-up method in which solid-state hydrogen storage is used as a hydrogen source. Background technique [0002] In the practical application of the fuel cell system with solid-state hydrogen storage as the hydrogen source, it is necessary to meet the application requirements under various climatic conditions, especially the cold-start hydrogen supply problem of the fuel cell system with solid-state hydrogen storage as the hydrogen source under low temperature conditions. [0003] The existing fuel cell system with solid-state hydrogen storage as the hydrogen source first supplies hydrogen to the fuel cell through the hydrogen temporary storage tank in a low-temperature environment, and when the fuel cell starts, the waste heat generated is transferred to the solid-state hydrogen storage tank, which is a solid-state hydrogen storage system. The tank h...

AI Technical Summary

Problems solved by technology

The normal operating temperature of the fuel cell is generally 60°C, and the waste heat generated during low-temperature start-up to the operating temperature is mainly used for self-heating; at lower temperatures in winter, the heat loss between the fuel cell and the solid-state hydrogen storage tank is large during the heat exchange process

Therefore, the existing problem of the fuel cell system with solid-state hydrogen storage as the hydrogen source is that it is difficult for the waste heat generated by the fuel cell to ensure the stable hydrogen supply from the solid-state hydrogen storage tank to the fuel cell, which makes it difficult for the system to operate smoothly at lower temperatures. run or take longer to achieve full power

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