In the production process of quality new energy rectangular contact, the crimping quality of the wire and the terminal is short and long and the process is often tight. It is related to the quality of the wiring harness assembly and the reliability of the car. After each wire in the wiring harness is crimped with the quality new energy rectangular contact, the cross-section of the terminal and the conductor must be inspected. If it is an excellent crimping section, each cell wire of the quality new energy rectangular contact is squeezed and deformed, and there is no leisure between the cell wires, and the air is not easy to enter, so as to prevent the appearance of the cell wire from oxidizing Cause poor contact.

If the cross-sectional area of ​​the wire does not match the size of the quality new energy rectangular contact, the crimping may cause the terminal to not close tightly, or the top of the terminal may be caught in the wire. If the terminal crimping height is adjusted too high, the wire core will be crimped incorrectly and poor contact between the wire and the terminal will occur. When the crimping height is adjusted too low, the bottom of the terminal will become thinner and the terminal wing drop will be too large on both sides. The strength of the terminal is easily damaged.

When the cross-section of the crimping point between the quality new energy rectangular contact and the wire conductor presents the above unqualified shape, the current carried in the connector terminal will become unbalanced, and it is very easy to cause one-sided overheating between electrical circuits and spontaneous combustion. It was verified that the project has a high failure rate and inadequate terminal crimping process, which is the secondary reason for the unqualified production quality, and the ineffective guarantee of the production quality is also the important reason for the quality but close.