The electrical connection methods of power batteries include the connection between individual batteries, the connection of battery modules, and the connection between power batteries and external components.
Among them, copper busbar is one of the conductive connection solutions between power battery modules. According to the different connection methods of the battery cell and conductive copper busbar, they are mainly divided into welding, screw connection, mechanical compression connection, and other forms. Different connection methods not only affect manufacturing efficiency, but also affect battery performance.
1. Welding: mainly including laser welding, ultrasonic welding, resistance welding, etc., the welding process is constantly improving, and as a connection solution for the battery core and conductive copper busbar, it is increasingly widely used. This process has higher efficiency and is easy to achieve automated production.
2. Screw connection: This connection method is relatively simple, mainly used for preventing screws from loosening and fixing the connection between the battery cell and the copper busbar. It is applied to battery systems with larger individual capacity, especially the screw connection structure of square batteries.
3. Mechanical crimping: Mechanical crimping is more flexible in disassembly and assembly, and has a greater possibility of obtaining a complete battery cell, making it easier for later maintenance and secondary recycling. This solution mainly relies on the elastic deformation of conductive components to maintain the electrical connection between the battery and the circuit, reducing the occupied space. The structural design of mechanical crimping should be sufficiently reasonable to prevent changes in contact resistance under long-term road vehicle operating conditions.
YIPU Metal is a manufacturer of copper busbars for energy storage and electric vehicles, focusing on the connection between energy storage and electric vehicles. For more information, please check our website: https://www.zjyipu.com/
