Polycarbonate Plate, for Additional Insulation Between the Cells
The cells from EVE, Lishen, and CATL are only wrapped with a thin film for insulation. The underlying aluminum cup is conductive and connected to a terminal. Therefore, additional insulation is recommended in a battery stack.
Cells from manufacturers Eve / Lishen / Catl and similar are only insulated with a very thin foil. The aluminum cup below is connected to a pole. It is therefore recommended to isolate the cells from each other additionally. Here we have different insulation panels