The performance of automotive connectors on the safety and reliability of wiring harnesses

The connector is the main component of the wiring harness, the performance of the connector is good or bad on the safety and reliability of the wiring harness has an important impact. Connector selection design principles are as follows: 1. Connector priority selection of double spring-type compression structure of the connector. The use of secondary locking to prevent the terminal backing sheath; sheath must ensure that the lock; sheath must have a locking structure, can be easily installed and removed, locking.2. Splice is composed of the main components of the wiring harness, the performance of the splice is good or bad on the safety and reliability of the wiring harness has an important impact on the energy. Connector selection design principles are as follows: 1. Connector priority selection of double spring-type compression structure of the connector. The use of secondary locking to prevent the terminal from backing out of the sheath; sheath must ensure that the lock; sheath must have a locking structure, can be easily installed and removed, locking installation in place when it can be clearly felt and heard the ringing sound. 2. Give preference to hybrid parts for butt sheathing. Considering the possibility of increasing the number of circuits in the future, the connector must be pre-positioned in order to ensure that the circuits can be increased in the future. If this is not taken into account, a larger sheath or an additional pair of sheaths may be selected again in the future, which will make installation and fixing difficult. When selecting the harness end sheathing to interface with the electrical sheathing, select a female sheathing for the harness end and a male sheathing for the electrical end. It should be noted that in the harness assembly process, the use of male terminals at the harness end may result in terminal bending or even damage. In order to ensure that the connector docking harness contact performance requirements, the choice of the sheath should be able to install the structure of the fixed card. 3. Located in the wet area of the docking of the sheath, choose a waterproof sheath. Sealing is to waterproof or prevent contamination, the location of the connector in the vicious or wet environment, such as water or corrosive liquids may enter, should choose the sealing of the sheath. The aggressive environments include the front compartment, wheel covers, chassis, doors, etc. Areas that are easily exposed during user use must be sealed, such as cup holders, gauges, etc. Sealed sheaths must be used where non-liquid contamination is present, e.g., side airbag sheaths and terminals may or may not be affected by seat foam, resulting in loss of gold-plated terminals. Driver and passenger rubber placed in the place should choose the sealing sheath, these areas will focus too much moisture and salt.4. The same harness location adjacent to the closer sheath to use marking or color to prevent mistakes.5. According to the wire cross-section, the size of the overcurrent to choose the connector. Different specifications of the connector can carry the current is generally as follows: 1 series, 10A or so; 2.2 or 3 series, 20A or so; 4.8 series, 30A or so; 6.3 series, 45A or so; 7.8 or 9.5 series, 60A or so.6. Airbags, ABS, ECU and other performance requirements of the connector, give priority to the use of gold-plated parts.

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