Charging cable gas cycle cooling method with liquid nitrogen or liquid air as cold source

Abstract

The invention discloses a charging cable gas cycle cooling method with liquid nitrogen or liquid air as a cold source. The charging cable gas cycle cooling method comprises the steps that S1, a cyclecompressor (8) is started and compresses outside air, the compressed air sequentially passes through an air cooler (9) and an inlet end A to enter a mixer (10), liquid nitrogen releases cold energy inthe mixer (10), heat exchange occurs between the liquid nitrogen and air, and dry air of the temperature of -40 DEG C- -35 DEG C is obtained after mixing; and S2, the dry air sequentially passes through an outlet end C, a buffer tank, an air control valve and a self-sealing type quick joint I to enter a cooling pipe, heat exchange occurs between the cooling pipe and a charging cable, the chargingcable is cooled by low-temperature dry air, and the dry air is heated to -5 DEG C-50 DEG C after absorbing heat released by the charging cable. The charging cable gas cycle cooling method has the beneficial effects that the charging current of the charging cable is improved, common charging time can be shortened to 5-10 minutes, fast charging is achieved, potential safety hazards, short service life and other problems existing in cooling by cooling liquid are solved, and long-term safety of the charging cable is ensured.

Description

technical field [0001] The invention relates to the technical field of charging cable cooling in DC charging stations for electric vehicles, in particular to a charging cable gas circulation cooling method using liquid nitrogen or liquid air as a cold source. Background technique [0002] With the requirements of energy and environmental protection, the popularity of electric vehicles continues to expand, and the requirements for vehicle charging speed are also getting higher and higher. The traditional charging cable is affected by heat, without a cooling system, the charging current is low, and the charging time is long. When the temperature of the cable exceeds the operating temperature, the charging must be stopped, and the charging can be continued after cooling down. At present, there are two ways of charging in the market: fast charging and slow charging. The general time of fast charging is 1-2 hours, and the general time of slow charging is 5-8 hours, which greatly ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a charging current that increases the charging cable, can shorten the ordinary charging time to 5 to 10 minutes, and realize fast charging; and solve the safety hazards of cooling liquid cooling. Life and other issues, to ensure the long-term safe and stable operation of the charging cable, the charging cable gas circulation cooling method using liquid nitrogen or liquid air as the cold source

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