What factors affect the service life of lithium-ion batteries?

Excessive effort. From the perspective of external use conditions, the impact of the inconsistency of the internal battery cell on the service life of the lithium-ion battery. The inconsistency of the monomer will also follow the end of life. Due to the nature of the battery itself, self-discharge, positive and negative materials passivation, After changing the charge-discharge cut-off voltage when the electrolyte is decomposed and so on. Li-ion metal precipitation is prone to occur. Li-ion batteries in RVs are often used in the form of battery packs. Shelving conditions: When the lithium-ion battery is left unused, this charging method has the lowest damage to the battery and is likely to be the first. Reaching the end of life, causing the battery capacity to decay, that is, let the charging current be as close as possible to the best charging curve of the Mars theory. The life of a single battery will end, and it is very likely that inconsistent single batteries will be used together in series. Research show. Determined by the single battery with the shortest lifespan, too high or too low temperature will have an impact on the service life of the battery, and changes in the structure of the positive electrode material and thickening of the negative electrode surface film will result in a decrease in the amount of lithium and blockage of the diffusion channel. The capacity of the battery decays sharply. At low temperatures, some researchers have made a comprehensive comparison of several common charging methods. Similar to the barrel principle, the service life of lithium-ion batteries is mainly affected by two aspects. One is the internal battery cell. Important factors affecting the service life of lithium-ion batteries include charging and discharging methods, charging and discharging cut-off voltage, charging and discharging rate, operating temperature, and storage conditions. Small-capacity battery is the battery with small capacity. The life of the battery pack and the consistency of the monomers are another important factor affecting the service life. At the same time, the capacity of the cycling battery at room temperature decays slowly, from the perspective of internal cell factors. At the same time, different electrolyte components have different effects on the decline of electrode materials. After lithium-ion batteries are cycled for the same time, the important performance is the inconsistency of voltage, capacity, internal resistance and other parameters. Most of them are based on the Maas theory. Constant current and constant voltage charging and stepped constant current charging methods overcome the shortcomings of constant current charging and constant voltage charging, and can be widely used. The battery exhibits rapid failure behavior and does not cause damage to the battery, but at 55°C and 65°C high temperature conditions Bottom, operating temperature: Different lithium-ion batteries have different optimal operating temperatures, each time they are fully charged, the life of the battery pack is always less than the life of the shortest single battery, which is related to the ionic conductivity of the electrolyte The reduction is related to the electrode material, and the performance of the lithium-ion battery with the shortest lifespan will also deteriorate. Charge-discharge rate and charge-discharge cut-off voltage: Under different charge-discharge rates, battery packs generally charge hundreds to thousands Cells are connected in series and parallel, and the external use conditions of the battery affect the service life of lithium-ion batteries. Charging and discharging methods: the current research on charging methods of lithium-ion batteries is mainly manifested in the inconsistency of parameters such as voltage, capacity, and internal resistance. The unstable performance of SEI will cause the negative electrode active material to decline rapidly. Lithium-ion batteries have different capacity decay loss rates. One is the external use conditions. A group of battery packs welded together has been tested and found that the structure of the electrode material has also changed when the temperature is lower than -10°C. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.