The soft package and hard package of lithium ion battery have their own advantages and disadvantages. The soft package of lithium polymer has high safety. The steel ladle, such as 18650, has a long life for most lithium ion batteries. Soft bag is in original state, with good exhaust; Hard bags are more suitable for cooling. Hard bags are safer. In fact, as long as the brand products of lithium-ion battery packs are purchased through formal channels, the brand products are tested and certified, and the quality and safety are more guaranteed.

　　Conclusion: Compared with hard lithium-ion batteries, soft lithium-ion batteries have more or less advantages in weight, capacity, shape, etc. However, there are relatively few types of flexible packaging lithium ion battery centers, and the cost of developing new types is also high. Therefore, flexible packaging lithium ion batteries can still meet less market demand.

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