Benefiting from the development of consumer electronics and new energy automobile industries, the demand for soft pack batteries continues to rise. As a kind of power battery, the pouch battery is packaged with aluminum-plastic film. It has the characteristics of large capacity, light weight, high density, less heat generation, and low internal resistance, and is welcomed by the market.
In pouch batteries, battery pouch is a critical and technically difficult material. The battery pouch is mainly composed of nylon layer, aluminum foil layer, heat-sealing layer and adhesive. Aluminum foil is the core material. 8021 aluminum foil is commonly used, and the thickness is in the range of 0.035-0.055mm. The material has a strong barrier ability, which mainly prevents the penetration of water vapor from the outside of the battery and prevents the seepage of the internal electrolyte.
The structure of the pouch battery is packaged with aluminum-plastic film. In the event of a safety hazard, the pouch battery will at most only blow up and crack, and will not explode. Compared with lithium batteries, it has many advantages such as small size, light weight, high specific energy, high safety, and flexible design.
At present, soft-pack lithium batteries are mainly used in the 3C field. The main electronic products in my country’s consumer electronics market, such as notebook computers, mobile phones, cameras, etc., have relatively mature market development, and the demand for soft-pack lithium batteries remains stable. In addition, the penetration rate of soft-pack lithium batteries in the field of power batteries is also increasing.
Aluminum foil is used as the raw material for the aluminum-plastic film of the pouch battery, and the performance requirements are strict. Mingtai Aluminum supplies 8021 aluminum foil and 8079 aluminum foil for battery pouch, mainly O temper. The company has high-precision rolling mill equipment, sophisticated automatic control system, skilled production technology, and strict quality management system. The 8021 battery foil produced has good deep drawing performance, good electrolyte corrosion resistance, and high heat sealing strength. The preferred aluminum material for the battery pouch.