Which is better for lithium battery soft pack and hard pack?

Lithium batteries are divided into two types in terms of packaging process, soft package and hard package. The packaging process of soft-packed lithium batteries is different from that of hard-packed lithium batteries, and it is important to meet the requirements for energy ratio. Soft-packed lithium battery The soft-packed lithium battery is just the liquid lithium battery covered with a polymer shell. The structure adopts aluminum-plastic film packaging, and the soft-packed lithium battery pack will crack at most in the event of a safety hazard. Advantages The safety performance of the soft-packed lithium battery pack is good, unlike the steel shell aluminum shell battery cell that will explode. Light weight, 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. Large capacity, the soft pack lithium battery pack is 10-15% higher than the steel shell battery of the same size and 5-10% higher than the aluminum shell battery. The internal resistance is small, and 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 battery. The design is flexible, and the shape of the soft-pack lithium battery pack can be customized according to customer needs, and new battery cell models can be developed. Disadvantages The existing soft pack battery cell models are few, which cannot meet market demand, and the cost of developing new models is high. Hard pack lithium battery Hard pack lithium battery is subdivided into cylinder and square. The difference from the soft-packed lithium battery pack is that the external packaging shell is a metal shell, so a hard-packed lithium battery of the same volume is much heavier than a soft-packed lithium battery. Features of Cylindrical Lithium Battery Pack Cylindrical lithium battery has mature processing technology, high degree of automation, and low PACK cost. There are many models, such as 18650, 21700, 26500, etc. Cylindrical batteries have a variety of shapes, which are suitable for the full layout of the space design of electric vehicles. The cylindrical battery pack has a large heat dissipation area, and generally uses a steel shell or aluminum shell to encapsulate a relatively low specific energy. The characteristics of prismatic lithium battery packs Square and cylindrical aluminum shells are generally also aluminum shells, and the protection of the battery core is better than that of soft-packed lithium batteries. Compared with cylindrical batteries, the safety of battery cells is also greatly improved. Disadvantages: It is difficult to guarantee consistency. There are too many models and the process is difficult to unify. It is suitable for customized processing and is not convenient for automatic processing of battery packs. Why are lithium batteries divided into hard and soft packages? Which is better? Lithium batteries are divided into two important types: soft packs and hard packs. One reason is that they are designed to meet the specific requirements of lithium batteries in different application environments, and another reason is for a higher energy ratio. High energy ratio is an important indicator that all batteries are pursuing. The light weight of soft-pack lithium batteries can enable equipment to load heavier soft-pack lithium battery packs. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the difference between a ternary lithium battery and a power lithium-ion battery