The Influence Of Mechanical Installation Stress On Copper Terminal Blocks

In the electrical connection system, copper terminal block serves as the internal connecting component and main conductive busbar of the battery pack, and its installation quality directly determines the stability of the system operation. The mechanical stress generated during installation can change the physical state of the contact surface, thereby affecting the conductivity.

Thermal expansion and contraction caused by temperature cycling is one of the main sources of stress. Bolts and flat washers are made of steel, while copper is the main material of copper distribution block. When operating at high current, temperature has a different effect on the two materials. This difference causes a change in contact pressure, and if compensation measures such as spring washers are not used, it will lead to permanent deformation of the copper terminal strip connection.