As an automotive interior device to operate effectively, automotive high-voltage cables play an important role in it. Cables connect various parts of the car, such as batteries, motors and other important components to run.



Power cables of meters or less in length are measured with a megohmmeter. When the cable temperature is +20°C, the insulation resistance value should not be lower than Ω.


The value of cable insulation resistance varies with the temperature and length of the cable. For the convenience of comparison, it should be converted to the resistance value per unit length at 20°C. Generally expressed in resistance value per kilometer, namely: =Rt×Kt×L where - at 20°C, the insulation resistance of the cable per kilometer MΩ/KM; Rt - the insulation resistance of the cable with length L at t°C , MΩ; L-cable length, Km; Kt-temperature coefficient, the coefficient is 1.0 at 20℃.


The insulation resistance of a good (qualified) power cable is usually very high, and its minimum value can be specified by the manufacturer: for a new cable, the insulation resistance of each cable core to the outer skin has a certain standard, and the rated voltage of 6KV and above should not be less than Ω, When the rated voltage is 1~3KV, it should not be less than Ω.


In addition,UHV cable

1.8kV and below are low-voltage cables; 3.6KV~ are medium-voltage cables; ~ are high-voltage cables; ~ are extra-high-voltage cables;

UHV cable is a kind of power cable that appears with the continuous development of cable technology. UHV cable is generally used as a middle hub in large-scale power transmission system. It belongs to a kind of high-voltage cable with high technical content. transmission.


Among them, automobiles use the high-voltage cable standard. As a car, the battery provides stored power for electronic parts and components, and wires and cables with high performance requirements for power transmission are required. The voltage of the power battery is generally a high voltage of 100-400V, and its output current can reach 300A. The capacity of the power battery directly affects the cruising range of the vehicle, as well as the charging time and charging efficiency. At present, lithium-ion power batteries are the mainstream. Under the influence of current technology, most of the current cars use lithium-ion power batteries. Due to the electromagnetic field interference caused by the high voltage and large AC of the new energy vehicle, as well as the electromagnetic interference caused by the rapid switching of electrical components, the entire high-voltage system is completely covered by the shielding layer considering the factors of electromagnetic interference. The ultra-high current and voltage of electric vehicles will produce a large electromagnetic induction phenomenon during operation. If the electromagnetic shielding problem is not well solved, it will inevitably affect the performance of automotive electronic equipment. Choose one.


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