The cycle life of lithium batteries is related to which influencing factors to carry out?

The cycle life of lithium-ion batteries refers to a certain current, after a certain number of charge and discharge cycles, the performance of the battery can be reduced to a certain time. So what factors are related to the cycle life of lithium batteries? The next world can share the relevant content with lithium battery manufacturers to you.

1.Accumulation of lithium metal:It usually occurs on the surface of the negative electrode. When lithium ions are transferred to the surface of the negative electrode, for some reasons they cannot enter the active substance of the negative electrode, thus forming a stable chemical substance.lithium ion battery VS lead acid battery In other words, after obtaining electrons, lithium metal will accumulate on the surface of the negative electrode and no longer participate in the subsequent cycling process, resulting in a decrease in capacity.

Dissolution of cathode material: Although the lithium hydroxide used as cathode material is stable enough, it will continue to dissolve during long-term use, generating a certain amount of electrochemically active substances and flammable gases, which will disrupt the capacity equilibrium between the electrodes and lead to an irreversible loss of capacity. This is especially true during overcharging, which sometimes leads to severe dissolution and gas release, which not only affects battery capacity but also poses a serious safety hazard.

3. The impact of electrolyte solution:Due to the limitations of chemical stability and heat resistance, the electrolyte solution will continue to dissolve and evaporate and accumulate for a long period of time, so that the total amount of electrolyte solution is reduced, the positive and negative electrode materials can not be fully penetrated, the charging reaction is incomplete, resulting in the decline of the actual usable capacity.

Fourth, the outside world for the application of environmental factors: lithium batteries have certain technical conditions and scope of use, such as the cut-off charging voltage, charging multiplier, operating temperature change range, storage temperature impact range.lithium battery vs lead acid However, in the actual need to use, over the limit of abuse is also very common, long-term unreasonable use will lead to irreversible chemical reactions in the internal structure of the battery enterprise, damage the battery management system, accelerate battery aging, resulting in the cycle can be a significant reduction in the service life, and in serious cases, may also lead to student safety and production accidents.

In summary, the cycle life of lithium batteries is affected by a variety of factors, such as the accumulation of lithium metal, the dissolution of cathode materials, electrolyte solution and external use. In order to extend the service life of lithium-ion batteries, we should pay attention to the rational use of batteries, avoid overcharging and overuse, and choose reliable lithium-ion battery products.