Analysis of the influence of low temperature cycling on the performance of 18650 battery

18650 battery is cycled at low temperature, and it is easy to precipitate lithium metal with high specific surface area. The form of lithium metal is related to factors such as current density and voltage. At the same time, the stability and acupuncture tests of the uncycled battery and the battery after low-temperature cycling can be concluded that the electrolyte plays an extremely important purpose. Lithium batteries will encounter different environments during use. In winter, the temperature in northern China is often lower than 0°C or even -10°C. When the charging and discharging temperature of the battery is lowered to below 0°C, the charging and discharging capacity and voltage of the lithium battery will drop sharply. This is because the mobility of lithium ions in the electrolyte, SEI, and graphite particles is reduced at low temperatures. Such a harsh low temperature environment will inevitably lead to the precipitation of lithium metal with a high specific surface area. There will be other analytical reactions in circulating the internal electrolyte of the battery at low temperature, so the battery will be more unstable after low temperature cycling, and thermal and mechanical abuse will increase its safety risk. In order to enhance the safety of the battery, to reduce the reaction between the electrolyte and the electrode, the contact interface between the electrode and the electrolyte will be an important research content. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Will the explosion of lithium batteries release toxic gas?