Connecting cable in light fast-charging new energy vehicle and preparation method

Abstract

The invention relates to a connection cable in a light fast-charging new energy vehicle and a preparation method. The connection cable comprises a liquid cooling channel, a hollow conductor, an insulation layer, an organosilicon impregnating varnish coating layer and a smooth aluminum protection layer which are sequentially arranged from inside to outside, wherein a temperature measurement optical fiber is arranged in the liquid cooling channel along the length direction of the hollow conductor, and the temperature measurement optical fiber penetrates through the hollow conductor and is connected with an external controller. A hollow aluminum conductor is preferably selected as the hollow conductor, is 30% of the mass of a copper conductor with the same cross section, is smaller in size and occupied space than a stranded aluminum conductor, is suitable for being installed and laid in a new energy vehicle, meets the requirements of light weight of the vehicle and fast charging of the new energy vehicle DC800A-1000A, and it is ensured that the hollow conductor is kept at the constant temperature of 60 DEG C by arranging the temperature measurement optical fiber. Heat generated by large-current charging of the hollow conductor can be quickly dissipated, and the temperature rise of the conductor after charging is less than or equal to 50 DEG C; the smooth aluminum protection layer meets the conditions that the transfer impedance is smaller than or equal to 8 milliohms / m when the frequency is 1-30 MHz, and the shielding attenuation is larger than or equal to 90 Db when the frequency is 30-1000 MHz.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a light-duty fast-charging new energy in-vehicle connection cable and a preparation method thereof. Background technique [0002] With the development and application of super charging piles and the increase in the operating voltage of the electric platform of new energy vehicles, the idea of ​​"charging for 5 minutes and a battery life of 200 kilometers" for new energy vehicles has gradually become a reality. The charging cable connecting the charging port to the power battery in the car It should also match the charging pile and power battery. This section of connecting cable usually increases the current carrying capacity by increasing the conductor cross section to meet the requirements of fast charging. However, when the section of the copper core cable is increased, the weight and cost of the cable itself will also increase significantly; after the section of th...

AI Technical Summary

Problems solved by technology

However, when the section of the copper core cable is increased, the weight and cost of the cable itself will also increase significantly; after the section of the multi-strand annealed aluminum conductor is increased, the volume of the cable itself will increase significantly, which is not suitable for laying in the car

Under fast charging, the cable conductor is prone to rapid heat generation and electromagnetic interference to the surrounding electrical

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