Many people don’t know much about new energy wire harnesses, but now we all know about new energy vehicles. New energy vehicle harnesses are also known as low-voltage wires, which are different from ordinary household wires. Ordinary household wires are copper single piston wires, with a certain degree of hardness. Some of them are as thin as hair, with several or even dozens of soft copper wires wrapped in plastic insulation tubes (PVC), which are soft and not easily broken. And with the continuous development of the new energy vehicle industry, the requirements for the quality of new energy vehicle wiring harnesses continue to improve, and new energy vehicle wiring harness products are customized products, different vehicle manufacturers and their different models have different design solutions and quality standards, which puts forward higher requirements for automotive wiring harnesses in the production process.
Characteristics required for new energy vehicle harnesses:
1.High-voltage wiring harness voltage and temperature resistance level of performance is much higher than the low-voltage wiring harness level, domestic OEM often use shielded high-voltage wire, shielded high-voltage wire can reduce electromagnetic interference, radio interference on the whole vehicle system, the entire high-voltage wiring harness circuit are shielded connection, motor, controller, battery and other interfaces high-voltage wiring harness shielding layer, through the plug-in and other crimping structure connected to the electrode battery controller shell, and then connected to the body overlap, high-voltage wire shielding for cable conduction is not necessary, but can reduce or avoid the radiation of high-voltage wire.
2.Voltage resistance: 600V for conventional vehicles, up to 1000V for commercial vehicles and large buses.
3.Current resistance: up to 250-400A depending on the electrical flow of the high voltage system components.
4.Temperature resistance: high temperature resistance grade is divided into 125 ° C, 150 ° C, 200 ° C, etc., high temperature conventional choice of 150 ° C wire; low temperature conventional -40 ° C.
For the determination of wire harness performance (insulation, voltage resistance, conduction), traditional testing methods consume a lot of human, material and financial resources and directly affect the production efficiency of the harness. Nowadays, the majority of automotive wiring harness manufacturers use harness testers, which has greatly improved the efficiency of wiring harness production. The electronic technology content and quality of the automotive wiring harness in the car is gradually becoming an important indicator for evaluating the performance of the car. This should be particularly important for the selection of wiring harnesses, it is necessary to understand the process and production of new energy vehicle wiring harnesses and markings.
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Post time: May-06-2023