The Energy Storage Connector Has A Strong Bonding Force Between Terminals
Terminals are key components of energy storage connector, and bear the main responsibility for battery storage connector current and signal transmission. In order to achieve the reliability of storage connector transmission, the spring of the socket terminal needs to provide sufficient positive pressure to the plug terminal at the contact part between the plug terminal and the socket terminal to ensure reliable current and signal transmission.
During the mating process of the plug terminal and the socket terminal, the positive pressure of the spring of the socket terminal and the roughness of the contact surface will directly affect the insertion force of the terminal. In other words, the insertion and extraction force between the plug terminal and the socket terminal is mainly determined by the magnitude and direction of the friction force. For multi-wire connectors, due to the large number of terminals, the overall terminal insertion force has a particularly significant effect on the bonding force. The factors that affect the plugging and extraction force of the connector terminal can be roughly divided into the following categories.
1) Terminal surface roughness. The plugging and extraction force of the connector can also be considered as the friction between the plug terminal and the socket terminal. According to the friction calculation formula f = μ × Fn (Fn positive pressure, μ dynamic friction coefficient), it can be seen that the magnitude of friction is directly related to the positive pressure and friction coefficient between the contact surfaces. Factors affecting the friction coefficient of the contact include contact material, surface roughness, surface treatment, etc.
Therefore, in the process of product selection, for products with coatings, the damage to the product coating during the production process should be minimized, and the quality of the product appearance should be strictly controlled to avoid burrs, oil stains and other appearance defects in the contact parts of the product, so as to achieve stable and reliable plug-in and pull-out force of the terminal.
2) The plug and the socket have a large interference fit, and the socket terminal gap is small. The plug thickness dimension L1 and the socket gap dimension L are designed to be interference fit, so as to achieve sufficient positive pressure between the plug terminal and the socket terminal to meet the reliability of the current and signal transmission effect. However, the excessive overfit structure (L1＞L) will cause the plug terminal head to be subjected to a larger positive pressure from the socket terminal spring. According to the friction calculation formula: f = μ × Fn, the increase in positive pressure Fn will directly lead to an increase in terminal insertion force. In addition, the elastic modulus of the socket terminal material itself is a key indicator affecting the positive pressure, which is why the insertion and extraction forces of bronze and brass terminals of the same structure are not completely consistent.
3) The guide structure of the plug terminal head and the burrs at the chamfer. In order to achieve the smooth matching of the connector plug terminal and the socket terminal, the plug terminal head is generally designed with a corresponding guide structure to improve the comfort of the terminal in the initial stage of matching. If the guide structure of the plug terminal is too small or there are obvious burrs at the guide, it is impossible to achieve reliable matching guidance between the terminals, and there may be interference problems between the plug terminal and the socket terminal, making it difficult to match the connector.
