To know about lithium batteries, you will understand the structure of a lithium battery module PCBA(printed circuit board assembly, a custom semi-product of all electronic products and systems) first. A lithium battery PCBA is composed of many small lithium-ion batteries connected in. Overcharge, over-discharge, too large currents for charging, short circuits, and too high temperatures during charging and discharging are not. The PCBs between and on the four sides of the battery units and inside the BMS are FR4 PCBs. On top of the lithium battery, there is a flexible PCB(FPC) cover that collects currents, temperatures, internal resistance, power amount left in the battery, and the. Flexible PCBs, or FPC, are used to transmit signals. They are lightweight and small in size and are easy to route and assemble in three. FR4 PCBs used between and on four sides of the lithium batteries and in the BMS have a high Tg. Tg is the glass transition.
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