A device for improving the low-temperature storage performance of fuel cells based on liquid nitrogen refrigeration

Abstract

The invention discloses a device for improving the low-temperature storage performance of fuel cells based on liquid nitrogen refrigeration, including: a main controller, a liquid nitrogen refrigerator, an ultra-low temperature damping buffer, a heat exchanger, a humidity controller, an electric stack, and a heating motor. The liquid nitrogen refrigerator is provided with a first gas valve and is connected to the ultra-low temperature damping buffer through a pipeline, the outlet of the ultra-low temperature damping buffer is connected to the first port of the first three-way valve, and the third port of the first three-way valve is connected to the first port of the first three-way valve. The heat exchanger is connected, the second port of the first three-way valve is connected with the electric stack; the heat exchanger is connected with the humidity controller through the second air valve, and the input end of the electric stack is connected with the third port of the second three-way valve. The ports are connected, the first port of the second three-way valve is connected with the second port of the first three-way valve through a pipeline, and the second port of the second three-way valve is connected with an external pipeline. The present invention can promote fuel cell Low temperature storage performance, and can start the heating motor at low temperature through a small current generator.

Description

technical field [0001] The invention belongs to the field of liquid nitrogen refrigeration, in particular to a device for improving the low temperature storage performance of a fuel cell based on liquid nitrogen refrigeration. Background technique [0002] In recent years, with the continuous development of new energy vehicles and the continuous expansion of their market, they have gradually become the key to the development of the automobile market. According to the valid data of the China Association of Automobile Manufacturers, in the past 2020, the production and sales of new energy vehicles completed 1.366 million and 1.367 million respectively, a year-on-year increase of 7.5% and 10.9% respectively. The impact of the new crown epidemic has been eliminated, and the automobile industry has shown strong development resilience and endogenous momentum, and production and sales have also reached a record high. New energy vehicles are expected to become the mainstream of the...

AI Technical Summary

Problems solved by technology

Too high refrigeration temperature will lead to unsatisfactory low-temperature storage performance of fuel cells, while too low refrigeration temperature will cause irreversible damage to fuel cells, and the pressure and humidity during refrigeration will also affect the performance of fuel cells during low-temperature storage

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