Overview of the service life of automotive high-voltage wiring harness

China [CN]

Product description: The specifications of high-voltage wires for new energy electric vehicles include shielded EV wires, unshielded EV wires, multi-core shielded electric vehicle EV high-voltage wires, and EV cable high-voltage wires.

Among them, electric vehicle high-voltage soft cables: OMG has formulated the enterprise standard for electric vehicle high-voltage wires, and is now working on formulating industry standards for electric vehicle high-voltage wires for institutions such as the China Quality Certification Center and the China Wire and Cable Quality Supervision and Inspection Center.

The high-voltage wiring harness of electric vehicles distributes power battery high-voltage cables (cables connecting power batteries to high-voltage junction boxes), motor controller cables (cables connecting high-voltage junction boxes to motor controllers), fast charging cables (cables connecting fast charging ports to high-voltage junction boxes), slow charging cables (cables connecting slow charging ports to on-board chargers), and high-voltage accessory harnesses (i.e., harnesses connecting high-voltage junction boxes to DC/AC, on-board chargers, air-conditioning compressors, and PTCs).

High-voltage cables for new energy vehicles are generally composed of high-voltage cables, connectors, protective materials (insulation tubes, braided tubes), mounting brackets (or rolled strips), sealing rubber rings, tapes, heat shrink tubes, labels, etc., so how long is the service life of the high-voltage cables?

Something happens during the daily use of new energy vehicles, that is, the material begins to age through the so-called oxidation process. Over time, all materials will oxidatively degrade. The insulation layer of the cable will eventually become brittle due to aging, will no longer provide sufficient insulation, and will eventually short-circuit. And this aging process is accelerated as the temperature increases.

The current generates heat due to the resistance of the conductor. The heat generated by the current heats the cable from the inside out. If the cable is heated from the exposed outside, it will also age as quickly as the cable is heated from the inside. Electric vehicle conduction products include: (high voltage) cables for internal use in electric vehicles, UL certified charging cables in the United States, TUV certified charging cables in Germany, CQC DC certified charging cables in China, CQC AC charging cables in China, OMG corporate standard charging cables, etc. The above is an answer to how long the "life" of the cable is. If you want to learn more, please visit OMG's official website and look forward to your visit.

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