CCS (Cells Contact System), also known as a wiring harness board integrated component, is composed of signal acquisition components (wiring harness/FPC/FFC, etc.), plastic structural components, copper aluminum bars, etc. connected into a whole through processes such as hot pressing or riveting, to achieve high-voltage series parallel connection of battery cells, as well as temperature sampling and voltage sampling functions of battery cells. Nickel sheet it is part of the BMS system and can be used in fields such as new energy power batteries and energy storage batteries.