What are the features of an electric bicycle wiring harness?

I. Appearance of electric bicycle wiring harness 1. The surface of metal clips should avoid burrs, rust, spots and other defects.　　2. The terminals should be crimped to the wires, and the terminals should be pressed on the conductor and insulation respectively, and the conductor should not be broken.　　3. The wire harness should be wrapped with insulation, and the wrapping should be tight, even and not loose; when using the protective cover, there should be no displacement and influence on wire bending.　　3. If there are no special requirements, the protective layer of the tape should be wrapped with a thin PVC tape half-folded, with its swallow not less than 4 mm, and its surface should not have coarse joints and gaps.　　4. The looseness of the surface of the protective layer of yarn should be uniform; 5. Plastic sleeves and bellows should be fixed with tape and tied to the harness; 6. The insulation of the contact surfaces should be good, and the conductors should not be broken; 7. The insulating sleeve at the connection between the wires and the harness terminals should be put on the joints, and there should be no breakage or displacement; 8. The wires and parts in the harness should be assembled correctly, and there should be no misalignment. Terminals should be seated in the sheath and should not be disengaged.　　9. Connectors should be in accordance with Q/FT A095 or the specified specifications of the products allowed by the Company.　　10. Complete marking: including the marking of safety components, special marking for sub-suppliers to check, wire harness number and its implementation of the standard number, certification mark. Second, the size of the electric bicycle wiring harness 1. The length of the trunk line and the protective sleeve should be not less than 100 mm, and a multiple of 10, such as 100 mm, 110 mm, 120 mm, etc..　　2. the length of the branch should be not less than 50 mm; 3. the distance between the contacts and the distance between the contacts and the branch point should be not less than 20 mm 4. the insulating sleeve at the connection between the wires and the terminals should be 20 mm5 mm long;.

Third, the connection force of the electric bicycle wire harness Tested with a tensile testing machine, the display value error does not exceed 1%, the speed of (1255) mm / min. After the test 1. terminals should be pressed on the conductor and insulation respectively, the conductor should not be broken.　　2. The connection between the terminal and the conductor should be firm and should not be damaged or broken under the specified tension.　　3. The surface insulation of the harness contacts should be good, and the wires should not be broken.　　4. Harness contact should be firm, in the specified tension should not be damaged or disconnected. Fourth, the electric bicycle wiring harness line conduction harness wire conductivity is good, no short circuit, short circuit, wrong way phenomenon.　　Among the causes of electric bicycle wiring harness failure are as follows: poor contact connector, short circuit between the cables, disconnection, grounding and so on. The main reasons are as follows.　　1. Natural factors. Wiring harness in a special environment after long-term use and catalytic, cable aging, insulation layer breakage, mechanical strength is reduced, resulting in electrical cable short circuit, disconnection, grounding and other faults, resulting in cable or electrical components burned. In addition, after a long time of use, the terminals will be oxidized and deformed, resulting in poor contact, which will also prevent the electrical equipment from carrying out normal work.　　2. Failure of electrical components. The failure of electrical equipment due to long-term use or other reasons may lead to short-circuit or grounding of the automobile wiring harness.　　3. Human factors. When the wiring harness is installed or serviced, the wiring harness cable insulation is damaged due to human factors, or the wiring harness is installed in the wrong position, or the wiring is not strictly in accordance with the installation diagram, which may lead to damage to the automotive wiring harness. In addition, automotive wiring harness failure in overhaul, not in accordance with the circuit diagram for recovery, or messy connection, cutting, messing and other issues, may lead to electrical equipment and automotive wiring harness failure.

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