The soft pack battery is made of plain aluminum foil and plastic film and special glue. It is called aluminum plastic film. The surface of the aluminum foil is coated with lithium iron phosphate and lithium manganese oxide ternary materials to make the inner core of the soft pack battery. The well-prepared inner core is placed in a well-made aluminum plastic film, and the battery of the electronic products that are commonly used nowadays is replaced by more lead-acid batteries.
8021 aluminum foil material has good performance extension, generally used thickness is 0.04mm, the main advantage is used in deep-drawing packaging materials. 8021 aluminum foil has the following advantages:
1. High energy density. The average 18650 battery capacity can be about 2200mAh, so the energy density is about 500Wh/L, and the energy density of the polymer battery can be close to 600Wh/L.
2. Good security. Polymer batteries do not have this problem. Even in extreme cases, because of the low strength of the packaging film, as long as the air pressure is slightly higher, it will rupture and will not explode. The worst case is burning.
3, can be designed according to customer needs.