The low-voltage wiring harness of new energy vehicles refers to a set of wires and cables that connect various low-voltage electronic devices and sensors inside the vehicle. Compared with high-voltage wire harnesses, low-voltage wire harnesses have lower operating voltages, generally between 12V and 48V. They are used to transmit power, data and control signals, and drive various low-voltage electronic devices inside the vehicle.
1. Constituting an integral part of the low-voltage wiring harness
- Battery management system (BMS) wiring harness
Used to connect the battery pack and battery management system to monitor battery status, temperature, voltage and other information. - Power battery cooling system wiring harness
Used to connect the battery pack and the cooling system, transmitting information in the coolant pipeline to maintain the battery temperature within a safe range. - Motor controller wiring harness
Connect the motor and its controller to transmit the electrical signals and control commands required for motor operation. - Charging system wiring harness
Used to connect charging sockets, charge controllers and battery packs, and transmit electrical signals and data information required for charging. - Vehicle electronic control unit (ECU) wiring harness
Connect various electronic modules and sensors of the vehicle to transmit vehicle operating status and control instructions. - Car lighting and signaling system wiring harness
Connect the vehicle’s headlights, rear lights, turn lights, brake lights and other lamps, as well as the vehicle’s signaling system, to transmit control signals and power supply. - Instrument panel wiring harness
Connects the vehicle’s instrument panel and center console to transmit signals and data required for vehicle status and information display. - Driving assistance system wiring harness
Connect various driving assistance systems of the vehicle, such as automatic driving systems, reversing radar, blind spot monitoring, etc., and transmit corresponding sensor data and control signals.
2. The role of low-voltage wiring harness
In new energy vehicles, the role of the low-voltage wiring harness is to transmit the battery’s power to various electronic devices in the car, and at the same time transmit the signals of the electronic devices to the controller to control and monitor the vehicle.
- Transfer electrical energy
The wires in the low-voltage wiring harness are responsible for transferring the power provided by the power system to various electronic devices and sensors in the car to support the normal operation of these devices and sensors. - Transmit signals
The wires in the low-voltage wiring harness are also responsible for transmitting signals from the sensor system, ignition system, light switch signals, etc. to the vehicle control unit. So that the control unit can perform data processing and vehicle control based on these signals. - Management wiring harness
The wires in the low-voltage wiring harness are also responsible for transmitting signals from the sensor system, ignition system, light switch signals, etc. to the vehicle control unit. So that the control unit can perform data processing and vehicle control based on these signals. - Improve reliability
The wires and connectors in the low-voltage wiring harness are designed and manufactured to withstand adverse factors such as vibration, temperature changes, and humid environments during vehicle driving, thereby improving the reliability of the automotive electrical system.
3. Functions and uses of low-voltage wiring harness terminals
New energy low-voltage wire harness terminal is an accessory used for electrical connection. It mainly uses its internal contacts to make wires of different colors and different functions come into contact, thereby ensuring the smooth flow of current when connecting circuits. The main functions include: connection, distribution, protection, control,
