Lithium batteries are now ubiquitous in our daily lives, and they exist in phones, tablets, and other devices we use in our daily lives. It can be said that lithium batteries can be found in everything from watches and mobile phones to laptops, electric cars, and more. But everyone may have noticed that even though they have been very careful in maintaining lithium batteries, there is still natural aging. So what causes the natural aging of lithium batteries?

1. The impact of design and manufacturing processes

The selection of materials is an important factor in the battery design process. Different materials have different performance characteristics, and the performance of developed batteries also varies. The good cycling performance of positive and negative electrode materials matches the battery's cycling life. In terms of ingredients, attention should be paid to the amount of positive and negative materials added.

2. The influence of charging cutoff voltage

The amount of lithium removed from NMC materials is directly proportional to the charging cutoff voltage, which means that the higher the charging cutoff voltage, the greater the amount of lithium removed from NMC materials, and correspondingly, the more unstable the structure of the materials. Therefore, it is necessary to choose the charging cutoff voltage reasonably based on the design life of the ternary lithium battery pack.

3. Positive and negative pole compaction

Excessive compaction of the positive and negative electrodes can increase the energy density of the battery cell, but it can also to some extent reduce the cycling performance of the material. From a theoretical analysis, the greater the compaction, the greater the structural damage to the material. The structure of the material is the basis for ensuring that the lithium battery can be recycled, that is, the lifespan of the lithium battery.