Dual-Thickness Bus Bar Layout for Low-Resistance Battery Modules

The bus bar is divided into multiple separate bus bars (first bus bar, second bus bar, third bus bar) instead of using a single thick bus bar. Each bus bar connects to adjacent battery cells, and they are collectively secured to the conductive member. This segmentation allows each individual bus bar to be more flexible and easier to position, improving assembly workability while maintaining low electrical resistance through the parallel connection of multiple conductive paths.

Multiple thin bus bars are merged into a single functional unit by collectively securing them to the conductive member. Individually, each bus bar is thin and flexible for easy assembly, but collectively they provide sufficient current-carrying capacity and low electrical resistance. The merging of multiple thin conductive paths achieves the electrical performance of a thick bus bar while retaining the manufacturing advantages of thin components.

The conductive member serves multiple functions: it acts as an electrical connector, a positioning reference, and a securing structure for multiple bus bars. The first, second, and third bus bars are all secured to the same conductive member, which simplifies the connection process. This multi-functional design reduces device complexity by consolidating connection points and providing a unified structure for managing multiple parallel battery cell connections.