The commonly used low-voltage cables in automobiles are PVC insulated wires, which are not resistant to temperature, are prone to aging, and are prone to cracking. When the circuit malfunctions, the PVC insulation layer melts, causing a fire accident. Because low-voltage cables for vehicles must meet the following requirements: (1) Reduce the specifications of stranded conductors. (2) Using high-strength copper alloys instead of electrolytic copper single wires to twist small sized conductors. (3) Compress the diameter while keeping the specifications of the stranded conductor unchanged. (5) Reduce the insulation thickness. (6) After the insulation thickness is reduced, the withstand voltage performance of the wire should still meet the requirements. Therefore, when selecting a twisted structure, the number of single wires can be increased and the diameter of single wires can be reduced to increase the ratio of insulation thickness to single wire diameter. (7) Using irradiation cross-linking technology to manufacture automotive wires. This is the foundation for reducing insulation thickness and improving heat resistance level. Currently, more and more thin-walled insulated automotive wires with temperatures above 105 ℃ are using irradiated cross-linked polyolefins. (8) Improve the heat resistance level. (9) Simulate various situations that may occur during the assembly and use of automotive wiring harnesses, establish and continuously improve testing methods, and improve the reliability of automotive electrical systems
Function of testing report:
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