Analysis of the difference between the characteristics of lithium battery soft pack and hard pack

Soft pack lithium battery: The soft pack lithium battery is just a layer of polymer shell on the liquid lithium battery pack. In the structure, the aluminum-plastic film packaging is used, and the soft-packed battery will only be vented and cracked in the event of a safety hazard. Structural characteristics of soft-pack lithium batteries: The key materials used in soft-pack lithium batteries are the positive electrode materials, negative electrode materials and separators. There is little difference between the traditional steel shell and aluminum shell lithium batteries. Composite membrane), which is the most critical and technically difficult material in soft-pack lithium batteries. The advantages of soft-packed lithium batteries: 1. Good safety performance The soft-packed lithium battery packs, unlike steel shell aluminum shell batteries, will explode. 2. The weight of the soft pack battery is 40% lighter than the steel shell lithium battery of the same capacity, and 20% lighter than the aluminum shell battery. 3. The capacity of a large-capacity soft pack battery is 10-15% higher than that of a steel shell battery of the same size and 5-10% higher than that of an aluminum shell battery. 4. Small internal resistance The internal resistance of the soft pack battery is smaller than that of the lithium battery. At present, the minimum internal resistance of the domestic soft pack battery core can be less than 35m, which greatly reduces the self-consumption of the lithium battery pack. 5. Flexible design The shape of the soft-pack lithium battery can be customized according to customer needs, and new battery cell models can be developed. Hard pack lithium battery: There are two types of subdivision: cylindrical and square. The structure of the package has its own advantages and disadvantages, and the important thing is that it should be related to different demand sites. It is difficult to guarantee the consistency of hard-packed lithium batteries. There are too many models and the process is difficult to be unified. It is suitable for customized processing and inconvenient for the automatic processing of lithium battery packs. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why do lithium battery packs need to be aging tested?