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INDUSTRY NEWS

The difference between automotive high voltage harness and electric vehicle charging harness

2019/01/21

As we all know, in the field of new energy vehicle charging piles, wire harnesses can generally be divided into two categories:


1. The wiring harness represented by the electric vehicle interior, the packaged high voltage harness and the low voltage harness can be classified into one type;


2. The charging harness can be divided into another category.

electric vehicle wire harness.png

So where is the difference between them?


First of all, laying different


Harness laying is usually the way a harness arrives from a distribution box and reaches an electrical device or another distribution box. The wire harness changes depending on the nature of the different environmental conditions.


The high-voltage harness of the car belongs to the fixed laying, but the static bending radius of each point is small; the charging harness belongs to the mobile laying, and the dynamic bending radius is small.


Second, the heat resistance is different


The higher the heat resistance of the high-voltage wire harness of the car, the better the heat resistance and the higher the load-bearing capacity, so the starting point is 125 degrees, the height is 180 degrees (silicone rubber), 200 degrees (fluoro rubber); the charging harness is generally exposed outside. Do not get too hot, do not exceed 70 degrees, otherwise it will cause burns.


Third, different requirements for EMI


First introduce EMI, EMC.


Electromagnetic compatibility (EMC) is a comprehensive assessment of electromagnetic field interference (EMI) and immunity to interference (EMS) of electronic products. It is one of the most important indicators of product quality. Electromagnetic compatibility measurements include test sites and test instruments.


In order not to affect the communication control function of the vehicle, the high-voltage harness of the vehicle has high requirements on EMI and must meet the EMC standard of the vehicle; when the vehicle is charging, the vehicle stops, the charging harness does not need to meet the EMC standard of the vehicle, and only needs to meet the relevant environment. EMC. Standards such as gas stations, residential community standards.

auto wire harness.png

Fourth, different protection measures


The necessary protective measures should be taken around the high-voltage harness of the car; the charging harness has no protective measures and must withstand various shocks and ultraviolet radiation.


Five, physical performance requirements are different


The high-voltage harness of the car needs to meet the wear requirements of the car; the charging harness must meet the anti-rolling requirements of the moving harness.


Six, different chemical resistance


The high-voltage harness of the car can withstand various liquids that can be contacted in the car; the charging harness can withstand various liquids in the living environment outside the car.


Seven, different size requirements


The high-voltage harness of the car is limited by space and has a strict size. The smaller the size, the better. The charging harness has no size limitation and can be made thicker and larger.


Eight, different color requirements


Internationally, the color of the car's high-voltage harness is orange; there is no need to charge the color of the harness.


Nine, the number of cores is different


For ease of laying, the high-voltage harness of the car is usually a single core; the charging harness is usually a multi-core integrated wiring harness with high-voltage main and ground lines, low-voltage signal lines, and even communication double-effect lines (CAN). ).


Ten, different international standards


International standards for automotive production lines are established by ISO organizations; international standards for charging lines are developed by IEC organizations.