Factors Affecting the Transmission Capacity of Automobile Connector Terminals and Prevention Methods (1)

Automotive terminal connectors are key parts in the field of automotive wiring harnesses, and are also important nodes that directly determine the signal and power transmission of the connector. In recent years, China's automobile industry can be said to be developing rapidly. The gradual improvement of the automobile spare parts field behind it has also affected the reliability and refinement of automobile connectors. As a standard for automotive connectors to transmit power, automotive terminals cannot be ignored.

Through the summary of the problems existing in the use of connector terminals in the past, it is found that the following factors affect the transmission capacity of the terminal: the material of the terminal, the design structure of the terminal, the surface quality of the terminal, and the crimping of the terminal.

1. Material of the terminal

Considering the requirements of functionality and economy, there are about two materials used in the terminal products of the Chinese connector manufacturing industry: brass and bronze. According to the difference in characteristics of the two materials, the conductivity of brass is generally better than that of bronze, but the elasticity of bronze is better than that of brass.

Taking into account the differences in the structure of the plug terminal and the socket terminal, the plug terminal is generally preferred to prefer the brass with better conductivity. The socket terminal itself generally has an elastic structure. On the premise of meeting the requirements of electrical conductivity, bronze materials are generally selected for the reliability of the terminal spring. For socket terminals with relatively strict conductivity, the conductivity of the bronze material can no longer meet the requirements. At this time, the general practice is to use brass materials for the socket terminals. Considering the defects of the brass material's poor elasticity, it will be elastic. A rigid support structure is added to the structure to increase the flexibility of the solder cup terminal.

2. Structural design

The design of the structure essentially still relies on the premise of cost saving to open source, designed to not only minimize the expenditure of raw materials, but also maintain the power transmission of the terminal. Such difficulty increases. For example, the part where the connector terminal is most likely to affect power transmission is its "bottleneck" mechanism. The bottleneck refers to the structure of the smallest cross-section in the conductive surface of the terminal. This structure directly determines the current carrying capacity of the terminal.