What is the influence of temperature on lithium battery charging

In the power supply system of pure electric vehicles, temperature control is one of the most important parameters, and it is also a key element that harms battery performance. In all battery detection system software, temperature must be marked, because temperature has a great impact on battery performance. Hazards, including internal resistance, filling characteristics, charging and discharging characteristics, safety factors, and service life of rechargeable batteries. The average charge-discharge working voltage and volume of lithium batteries decrease with the decrease of temperature, especially at -20°C, the charge-discharge volume and uniform charge-discharge working voltage of rechargeable batteries decrease faster. According to electrochemical decomposition, SEI film resistors and aqueous solution resistors do not change much in the entire temperature range, and are less harmful to the low-temperature characteristics of rechargeable batteries; while the charge transfer resistors vary greatly in the entire temperature range, and are different from each other. Aqueous solution resistors and SEI film resistors have larger changes. The reason is that with the decrease in temperature, the positive ion conductivity of the lithium battery electrolyte decreases, and the SEI film resistors and electrochemical corrosion resistors increase, which in turn causes the European mother electric polarization, concentration polarization and photoelectricity at low temperatures. The improvement of catalytic polarization is important in the charge-discharge curve of rechargeable batteries, which shows that the average working voltage and charge-discharge volume decrease with the decrease of temperature. The best lithium battery application temperature is 0 to 35°C. The specificity of lithium batteries is reduced under low temperature standards, the charging and discharging ability of rechargeable batteries is weakened, and the use time is reduced. In a short-term low-temperature natural environment, the destruction of the lithium battery is only temporary, and it is not easy to cause harm to the battery power. After the temperature warms up, the characteristics will be restored. However, if the rechargeable battery is charged in an ultra-low temperature working environment for a long time, the anodic oxidation surface of the rechargeable battery will dissolve metal lithium. This whole process is irreversible and will cause permanent damage to the battery power. Because of the product quality problems of the rechargeable battery itself, and its own product quality problems and embrittlement problems, the mobile phone will be automatically turned off at low temperatures. On the one hand, it is for the reason of protecting the battery, on the other hand, it is also because the manufacture of its own battery is not Qualified and caused by aging. 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. Previous post: What are the safety measures for lithium battery explosion?