Nowadays,electric vehicles are very common in society. Especially in recent years, newenergy electric vehicles have made a breakthrough in sales and even have theopportunity to surpass traditional fuel vehicles. Compared with fuel vehicles,electric vehicles are special, with the characteristics of high voltage andhigh current. They are usually equipped with power supply systems with morethan 300V and current of more than 200A. This is completely different from thetraditional car only equipped with 12 / 24V power supply system. The safetymeasures of high-voltage distribution box, high-voltage line and connector ofelectric vehicle have become the safety aspects that need to be paid attentionto.

Highvoltage line of electric vehicle refers to the component of connecting circuitformed by punching copper contact terminal (so-called connector) and wire(cable) after crimping, wrapped with plastic compression insulator or externalmetal shell, etc. In terms of function, there are two kinds of power linescarrying the power of driving actuator (actuator) and signal lines transmittingsensor input commands. Power lines are divided into low-voltage harness andhigh-voltage harness.

Thetraditional connector equipment has been difficult to meet the requirements ofhigh current and high voltage. The connector of electric vehicle must be a high-powerconnection product. If it does not meet the requirements, the electric vehiclefire accident is inevitable. Electric vehicle connectors must be automotivegrade products, and industrial grade products do not meet the requirements. Themain indicators include IP grade, insulation grade, low resistance, errorproofing and locking function.

So, iselectric vehicles safe? Analysis on safety technology and measures of highvoltage devices is electric vehicle safe or not? Analysis of safety technology andmeasures for high voltage devices: high voltage harness is the cable betweenthe connectors in the electric vehicle and is a very key connector to supportthe safe operation of the whole vehicle. First, it is required to be shielded,have IP grade, prevent overheating or combustion. The vehicle is used in aharsh environment. If it does not meet the requirements, it is the most proneto spontaneous combustion. Therefore, electric vehicle high-voltage line playsan important role, and the quality of electric vehicle high-voltage line isvery important.

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