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Mobile WebSiteUnder the dual influence of the rising environmental protection demand and the tight supply of oil prices, electric vehicles have received more and more attention. As the network main body of the electric vehicle system, the automobile wiring harness is a carrier for power transmission and signal transmission of the electric vehicle, and is essential for the running of the electric vehicle.
In the automotive wiring harness, the automobile high-voltage harness is the most critical, and it bears the electrical transmission between the energy and power devices of the electric vehicle. Compared to harnesses in other electrical equipment inside automobiles, automotive high-voltage wiring harness requirements can ensure that vehicles have higher safety and reliability under various harsh environments and driving conditions.
At present, most automotive high-voltage wiring harnesses consist of cables, connectors, sensors, mounting brackets, and other devices, which require high voltage and current transmission. In particular, the problem of overheating caused by the high-current transmission of the high-voltage wiring harness of the automobile imposes higher requirements on the connection quality of the connector terminals and the cable. According to the analysis of the various types of faults in the automotive high-voltage wiring harness, more than 60% of the faults are caused by improper connection between the cable and the connector terminals. Therefore, this article has carried on the thorough research to the connection way of the cable and the connector terminal, in the hope of improving the rationality and reliability of its design and assembly. Usually, the connection methods of the automobile harness cable and the connector terminal mainly include welding, crimping and mechanical connection.
The soldering method is mainly used for soldering connection. It is suitable for the assembly of automotive wiring harnesses with small batches and small cable cuts. The crimping method is mainly used to apply external force to the corresponding specifications of the die to make the connector terminals contact with the cable and the connection is reliable. , Long life, suitable for mass production, but need to use the pressure die to achieve connection and assembly; mechanical connection is mainly through fasteners to connect the terminal and the cable tightly fixed, the assembly is relatively complex, not suitable for mass production.
At present, foreign automotive wire harness cables and connector terminals are generally connected by crimping. The connection technology is very stable and reliable. The production of automotive wire harnesses in China is still at a stage of development. In particular, the reliable connection technology of automotive wire harnesses is not yet fully understood. . According to the long-term experience in connection and assembly of automotive wire harnesses, the three types of connection methods, namely, welding, crimping, and mechanical connection, are most suitable for crimping, and the connection is fast, reliable, robust, and long-life, and is suitable for large-volume processing. The research of the crimping process technology is most important for the reliable connection of automotive high voltage harness cables and connector terminals.
