Why does the mileage of lithium batteries decrease in winter?

The range of the lithium battery of electric vehicles will decrease in winter. There are several reasons. First of all, it has a certain relationship with the internal electrodes and electrolyte of the battery. Regarding the power lithium-ion battery of electric vehicles, when the temperature is relatively low, the positive electrode The active material of the material, the lower the temperature, the worse its activity, and the electrochemical characteristics of the battery will cause the battery's activity to decrease rapidly, which will cause the internal resistance of the battery to increase. All lithium ions inside the lithium battery are stored in the positive electrode, while the negative electrode is composed of graphite (carbon). The electrolyte and diaphragm are included between the positive and negative poles. The discharge process of a lithium battery is the movement process of lithium ions from the negative electrode to the positive electrode, and the discharge of the lithium battery is used to supply the electric energy required for operation of the electric vehicle. When the temperature drops, the charging and discharging process will slow down. Therefore, the discharge current becomes smaller, and the battery capacity becomes smaller. The marked operating temperature of lithium batteries is 0-40℃, but in fact, when the temperature is lower than 25℃, there will be a certain degree of performance degradation: the battery capacity decreases, the discharge speed becomes slower, and the battery output power decreases. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: How does the negative electrode of the lithium battery react with the electrolyte?