Automotive wiring harness and selection

Detailed introduction of automotive wiring harness and its selection：

First, the basic concept and composition of automotive wiring harness

Automotive wiring harness is the main body of the automobile circuit network, responsible for connecting the electrical and electronic components of the automobile and making them function. It is mainly composed of wire, insulation sheath, terminal, cable tie, protective sleeve and other auxiliary materials. These components are combined by specific processes and technologies to form a complete circuit system.

Wire: The main carrier for transmitting current and signals, usually made of conductive materials such as copper or aluminum.

Insulation sheath: Wrapped around the outside of the wire to provide insulation and protection against current leakage and short circuit.

Terminal: Used to connect wires and other electrical components to ensure the stable transmission of current and signals.

Cable ties and protective sleeves: Used to secure and protect wire harnesses from mechanical damage and vibration.

Second, the main functions and characteristics of automotive wiring harness

Transmission signal and power: Automotive wiring harness is responsible for transmitting the power signal and data signal of the electrical system inside the car, and realizing the information exchange and collaborative work between various electronic and electrical components.

Ensure circuit reliability: The arrangement and production of wiring harnesses are very particular to ensure the stable transmission of electrical signals and the reliability of the circuit.

Saving space and weight: Wiring harness wires, plug-ins and other components are reasonably bundled together, which not only saves space in the car, but also reduces the overall weight of the car.

Adapt to complex environment: Automotive wiring harness needs to adapt to a variety of complex environmental conditions, such as high temperature, low temperature, humidity, vibration, etc.

Third, the key factors of the selection of automotive wiring harness

Electrical performance:

Current carrying capacity: Select the appropriate wire cross-sectional area according to the load current of the electrical parts.

Insulation resistance: Ensure that the insulating layer of the wire has sufficient insulation resistance to prevent current leakage and short circuit.

Voltage rating: Select the appropriate wire voltage rating according to the voltage level of the electrical system.

Mechanical properties:

Tensile strength: The wire and its connectors need to be able to withstand a certain amount of tension without breaking or loosening.

Wear resistance: In the parts that need frequent movement or friction, choose a wire with good wear resistance.

Corrosion resistance: In humid or corrosive environments, choose a wire with corrosion resistance.

Environmental adaptability:

Temperature adaptability: According to the working environment temperature of the automobile wire harness, select the appropriate temperature rating of the wire.

Waterproof and dust-proof performance: In the parts that need to be waterproof and dust-proof, select a wire or connector with corresponding performance.

Compatibility:

Interface matching: Ensure that the connector of the selected wiring harness matches the device and interface to be connected.

Signal transmission requirements: Select the appropriate wire type and connection mode according to the requirements of signal transmission.