The cycle life of the lithium generator refers to the time period for the battery to decay to a certain amount after a certain number of battery charging cycles are carried out under a certain current condition. Where does this relate?
1. Accumulation of lithium metal:
Generally produced in the negative surface. When the lithium-ion battery is transferred to the surface of the negative stage, for some reason, it cannot enter the active material of the negative stage, thereby producing a stable chemical substance, that is, after obtaining the electronic device, it accumulates on the surface of the negative stage and becomes metal lithium , no longer participate in the subsequent circulatory process, resulting in a decrease in volume.
2, it is the dissolution of the positive electrode material of the battery:
Lithium-containing hydroxide as the positive electrode material of the battery, although sufficiently reliable, will continue to decompose during long-term use, producing a certain amount of photocatalytic plastic substances and flammable gases, thereby destroying the electrode. volume equalization between them, resulting in irreversible volume damage. Especially when the battery is overcharged, this situation is particularly obvious, and sometimes there will be strong dissolution and gas release, which will not only affect the battery power, but also cause serious safety hazards.
3. The hazards of electrolyte solution:
In the continuous circulation process, due to the limitation of chemical stability and heat resistance, the electrolyte solution will continue to dissolve and evaporate, and accumulate for a long time, so that the total output of the electrolyte solution will be reduced, and it will not be able to fully infiltrate the positive and negative materials. The charging reaction is not complete, resulting in a reduction in the specific application volume.
4. External application elements:
Lithium batteries have certain application standards and categories, such as battery charging voltage, battery charging rate, operating temperature range, storage temperature range, etc. However, in specific applications, over-limit abuse is very common. Long-term unscientific use will cause irreversible chemical changes inside the rechargeable battery, resulting in damage to the rechargeable battery system, accelerating the embrittlement of the rechargeable battery, and greatly reducing the service life of the circulatory system. , When it is more serious, it will continue to cause safety accidents.
The above is the relevant content sharing about the factors related to the cycle life of lithium generator. For an ideal lithium battery, the volume balance will not change during the cycle cycle, and the initial volume of each cycle should be a certain value, but the actual situation is much more complicated. Any adverse reactions that can cause or consume lithium-ion batteries will cause changes in the battery's power balance. Once the battery's power balance changes, this change is irreversible and can accumulate through multiple cycles, which will seriously affect the use of lithium batteries. life.
