Large-current power cable and use method thereof

Abstract

The invention discloses a large-current power cable and a use method thereof. In order to solve the problem that the internal temperature of the cable cannot be too low or too high, the invention provides the large-current power cable, the heat dissipation performance of the cable core can be changed according to the actual temperature of the internal cable core, and it is ensured that the cable core is always at a proper working temperature.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a high-current power cable. Background technique [0002] Electric vehicles mostly use fast charging technology, so they need to use high-current power cables. The transmission of large currents makes the problem of cable heating more serious. The materials of cable insulation and sheath are often polymer materials, which have extremely poor thermal conductivity and too much heat. The accumulation of heat will accelerate the aging of the cable insulation and limit the ability of the cable to carry current. [0003] At the same time, the internal temperature of the cable is not as low as possible. Too low temperature will make the insulating layer brittle and reduce the softness of the insulating layer, which not only brings inconvenience to use, but also easily appears after repeated bending. Cracks bring the safety hazard of leakage. In many areas of our country, the...

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Problems solved by technology

[0002] Electric vehicles mostly use fast charging technology, so high-current power cables are required. The transmission of high currents makes the problem of cable heating more serious. The materials of cable insulation and sheaths are often polymer materials, which have extremely poor thermal conductivity. Accumulation of heat will accelerate the aging of the cable insulation and limit the ability of the cable to carry current

[0003] At the same time, the inner temperature of the cable should not be as low as possible. If the temperature is too low, the insulation layer will become brittle and reduce the softness of the insulation layer. Cracks bring potential safety hazards of leakage. In many areas of our country, the temperature in winter will reach below 0 degrees. The charging cables for electric vehicles are often bent during use. The above problems are especially prone to occur.

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