Why do lithium-ion power batteries undergo safety performance testing?
Lithium ion power batteries, regardless of their individual capacity, are inevitably used in combination with batteries. If precise balance control cannot be achieved, it is no different from abuse for a particular individual. The number of battery cycles and the charging and discharging system have a significant impact on the safety of the battery. During use, it is necessary to minimize the overcharging or discharging of monomers, especially for batteries with high monomer capacity. Thermal disturbance may cause a series of exothermic side reactions. Why do lithium ions in power batteries need to undergo safety performance testing?
Lithium ion batteries have made significant progress in recent years, and lithium-ion power batteries have emerged in the market. At present, it is still in the development stage and is being improved to be suitable for high rate charging and discharging cycles, high and low temperature conditions, harsh environments, and low maintenance in industrial environments. With the in-depth research on safety issues such as battery systems and battery materials, it is necessary to work together from the design, production, and use sides to address the safety of lithium-ion batteries, avoid unsafe factors, and promote the healthy development of lithium-ion power batteries.
Lithium ion batteries also have a very poor "aging" characteristic. After a period of storage, even if it is not recycled, some of its capacity will be permanently lost. The reason for this is that the positive and negative electrodes of the battery have already started their depletion process since leaving the factory. The rate of "aging" varies under different temperatures and battery states. The higher the storage temperature and the more fully charged, the faster the battery capacity loss will occur. Therefore, it is not recommended to store lithium-ion batteries in a saturated state for a long time.
The usage environment of batteries varies greatly, and different batteries have different usage environment requirements. Even the same battery usage environment can be vastly different. It is more important to pay attention to how to ensure safety of batteries in case of misuse or abuse. Long term cycling lithium-ion batteries have poor heat resistance, disturbance, and abuse resistance. To avoid excessive heat generated by physical or chemical reactions of the constituent substances due to specific energy inputs in the battery during abuse, targeted designs need to be adopted for batteries with different structures.