In energy storage CCS busbars, aluminum busbars are typically used as key components for current collection and transmission. As current collectors, they efficiently gather and conduct electric current, while delivering excellent electrical conductivity, stability and reliability to support normal battery operation and enhance overall system performance.

The working principle of copper bars is based on electrical conduction and connection. In a circuit, copper bars transmit current to various components, realizing circuit connection and current path.

CCS assembly, also known as **Battery Connection System assembly**, provides effective electrical connection for individual cells within the battery module. Its main functions include realizing series and parallel connection between cells through busbars, providing the module’s positive/negative output interface and low‑voltage interface, as well as supplying **cell voltage sampling** and **temperature sampling data** to the battery management system. According to the sampling connection system and manufacturing process, CCS assemblies can be classified into:Wiring harness CCS、Bonding CCS、FPC & nickel tab CCS、Press‑fit connection CCS、Hot‑press CCS，Among them, hot‑press CCS integrates FPC, aluminum busbars, injection molded parts and other components via PET hot‑press film.