What is flexible pack battery?
What is flexible pack battery?
Flexible pack battery also named as Soft-pack batteries, as they are called in comparison to the two hard-shell types of lithium LiMNO2 battery, Li-SOCL2 batteries, are not so different from square or cylindrical lithium-ion batteries in their internal composition (positive, negative, diaphragm, electrolyte) , the biggest difference is that the flexible battery with aluminum-plastic composite film as the shell, the square and cylindrical battery with metal materials as the shell.
The flexible-package battery is the battery cell that uses the aluminum-plastic packaging film as the packaging material. In the structure, the aluminum-plastic packaging film is used to save the steel shell or aluminum shell. The overall weight is reduced, and the energy consumption coefficient is also lower, at the same time, the safety of the battery has been greatly improved, in the case of potential safety problems, at most the battery will burst gas.
In general, the flexible battery has the following advantages:
1, Best safety: Flexible Battery in the structure of aluminum plastic film packaging, in the event of thermal management out of control or puncture, its flexible package will provide buffer space for the cell, bulging deformation occurs, and eventually a fire or smoke, but not an explosion.
2. Light weight and high energy density: flexible-package batteries are 40% lighter than steel-shell batteries of the same capacity and 20% lighter than aluminum-shell batteries, so they usually have a higher energy density, at present, the domestic breakthrough 300 Wh/kg energy density of battery enterprises, the vast majority of which are soft-pack battery.
3. Good electrochemical performance and long life: the internal resistance of the battery is small, which can greatly reduce the battery's self-consumption; in addition, the cycle life of the battery is longer.
4. Flexible design,easy to customize. The shape of flexible battery can be customized according to customer needs, the development of new cell models.
Similarly, the soft-PACK Battery also has shortcomings, that is, poor product consistency, high cost, easy to leak and gas, and in the group process needs additional shell, PACK process complexity.
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