7165-0796 Automotive Waterproof Plug Cavity Seal Terminal Cable Waterproof Plugging Connector

2. Maintenance switch

MSD, also known as manual maintenance switch, is a key component to ensure the high-voltage electrical safety of pure electric vehicles. It is an executive component that can achieve electrical isolation of the high-voltage system at critical moments. It can highly integrate the breaking device and fuse, and is equipped with appropriate fuses internally to protect the circuit from overcurrent and short circuit, Reasonable design and operation of maintenance switches play a crucial role in the electrical safety of electric vehicles.

3. Charging interface

There are currently two types of charging interfaces, AC charging interface and DC charging interface, while AC interface connects the AC power grid to the on-board charger through cable control and protection devices. The DC interface directly connects the DC power supply equipment with control and guidance function to the electric vehicle battery. The rated voltage of the AC interface is 250Va. c or 440Va. c, and the rated current does not exceed 63A. The rated voltage of the DC interface is 750Vd. c or 1000Vd. c, and the rated current does not exceed 250A. The rated voltage and current value of the charging interface must be determined according to the vehicle layout requirements. Other relevant electrical characteristics and parameters of the AC and DC charging interface must meet the requirements of national standards GBT20234.2-2015 and GBT20234.3-2015.

Wire harness fixation and protection 1. Wire harness fixation

There are various ways to fix the wiring harness, and based on the layout of various high-voltage components in the vehicle, the fixing method of the wiring harness or connector should be reasonably selected. Currently, the commonly used fastening methods include: integrated fixed tie with wedge shaped fixing head, integrated fixed tie with fir tree shaped fixing head, etc., which are suitable for circular hole fixing; Integrated welding stud fixing straps, isolation type double clamp head straps with welding stud fixing components, etc. are suitable for welding stud fixing; Fixed straps and clip components such as pipe clamps are suitable for fixing to pipes, hoses, and wiring harnesses; Plate edge buckles are suitable for fixing metal or plastic edges with a thickness not exceeding 3mm; Heavy duty fixing device is suitable for wire diameter ≥ 35mm2; The cable conduit support is suitable for lifting the cable from the frame track to separate the cable from the protruding parts of the vehicle body and prevent cable wear; The connector buckle is suitable for fixing high-voltage connectors; The corrugated pipe buckle is suitable for quickly fixing corrugated pipes.

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