Understanding Automotive Use of High Voltage Shielded Cables

Today, with international fuel prices hurting, new energy electric vehicles are no strangers to the road. However, the high-voltage wires and cables used in vehicles are applied to new energy vehicles, especially the high-voltage wires of battery systems for electric vehicles.


Regarding the thickness of the vehicle's high-voltage cables, the principle of use of household cables is the same as that of other electric fields. For example, comparing two kinds of high-voltage wires (by thickness) of two cars, it can be concluded that the quality of the high-voltage wire harness of "thin wire" is lower than that of "thick wire". However, these two comparison methods have different places of application and different functions, and there will be certain differences in the comparison.


Among them, there are many specifications and models of vehicle high-voltage lines, such as 3mm²-70mm². Taking an electric vehicle as an example, under the high voltage of nearly 400V, the high-voltage wire for an 85KW motor is very different from the high-voltage wire for a 6.6KW charger - "thickness", that is, the difference in the cross-sectional area of ​​the copper wire, which is also obvious. Therefore, vehicle high-voltage wiring harnesses are assembled on different components according to power requirements.


Application: The high-voltage wiring harness is connected to the components on the vehicle, including drive motors, air conditioning systems, on-board batteries, etc. According to the matching requirements of the equipment, these suitable materials are also commonly used materials, such as 125°C XLPE and 180°C silicone, which have high and low temperature resistance and tear resistance. The cable material is thermosetting material, the wires and cables are soft and smooth, and the cables of different specifications and models are all shielded or unshielded materials.


The shielding layer of the shielded cable is mainly made of non-magnetic materials such as copper and aluminum, and the thickness is very thin, which is much smaller than the skin depth of the metal material at the frequency of use. The effect of the shielding layer is not mainly due to the reflection of the electric field and magnetic field by the metal body itself. , absorption, but due to the grounding of the shielding layer. Different grounding forms will directly affect the shielding effect. The grounding methods of the electric field and magnetic field shielding layers are different. Can be ungrounded, single-ended or double-ended.



For more ev high-voltage cable and ev charging cables,please visit the official website of OMG: https://www.omgevcable.com

You can also visit other language sites:
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