The dangers of inconsistency in lithium-ion battery packs:
A single lithium-ion battery with excessively high capacity can experience thermal runaway in the event of an accident. This causes a rapid internal reaction, and the excess energy has nowhere to be released in a short period, posing a significant danger. Especially when safety technologies and control capabilities are not yet fully developed, the capacity of each battery should be carefully controlled.
Capacity loss: The capacity of a lithium-ion battery pack is determined by the barrel principle, where the capacity of the worst cell determines the overall capacity of the lithium-ion battery pack.
Lifespan loss is a common problem with small-capacity battery cells. Repeatedly charging and discharging them at full power can cause them to reach the end of their lifespan first. Once a single cell reaches the end of its life, the entire set of cells soldered together will also reach the end of its life.
Are lithium iron phosphate batteries safe?
Is lithium iron phosphate battery safe? This question needs to be answered from three aspects: material/structural stability, manufacturing process, and charge/discharge characteristics.
1. Lithium iron phosphate batteries are currently the safest cathode material for lithium-ion batteries. They do not contain any heavy metal elements that are harmful to the human body, and oxygen is difficult to be released from their olivine structure, which improves the stability of the material.
2. The production process of lithium iron phosphate battery packs is largely the same as that of other lithium-ion battery types. Its core processes include: material preparation, coating, rolling, sheet forming, and winding. In the material preparation stage, lithium iron phosphate material has relatively poor conductivity, so the particles are generally made smaller. The objective effect of this is that the internal arrangement is more uniform, which promotes the formation of a balanced voltage platform and keeps the battery in a stable state during operation.
