Battery pack 48v lifepo4 are now ubiquitous in our lives. The mobile phones and tablets we use everyday have lithium batteries. It can be said that lithium batteries can be found in everything from watches and mobile phones to laptops and electric vehicles. However, we may also find that the lithium battery has been carefully maintained, but there is still natural aging. What causes the natural aging of lithium battery?
1. Impact of design and manufacturing processes
In the process of battery design, the choice of materials is an important factor. Different materials have different performance characteristics, and the developed battery pack performance is also different. The cycle life of the battery will be long only if the cycle performance of the positive and negative electrode materials is good. In terms of ingredients, attention should be paid to the addition amount of positive and negative materials.
2. Effect of charging cut-off voltage
The amount of lithium removal of NMC materials is in direct proportion to the charging cut-off voltage, that is, the higher the charging cut-off voltage is, the greater the amount of lithium removal of NMC materials will be, and correspondingly, the more unstable the material structure will be. Therefore, the charging cut-off voltage should be reasonably selected according to the design life of the ternary lithium battery pack.
3. Positive and negative pole compaction
Excessive compaction of the positive and negative electrodes can improve the energy density of the battery cell, but it will also reduce the cycling performance of the material to a certain extent. Theoretically, the greater the compaction, the greater the damage to the material structure. The material structure is the basis for ensuring the recycling of the lithium battery, that is, the life cycle of the lifepo4 battery module.