Does temperature change affect the performance of electric vehicle lithium battery?

Changes in temperature will directly affect the charging and discharging performance of electric vehicle lithium batteries, but many electric vehicle users will not pay attention to this when using electric vehicle lithium batteries. From the current experimental results of lithium battery manufacturers, the ambient temperature is too high or too low to have a distinct impact on the characteristics of the lithium battery. The current voltage drops and the capacity is insufficient. It is best to control the temperature between 10-50 degrees. Have insulation measures. In fact, in the process of charging and discharging the lithium battery of electric vehicles, chemical reactions will occur, and this reaction will cause the activity of the active material on the battery to increase or decrease. The higher the temperature, the higher the acceptability, so the charging voltage is fixed, so that it can overflow. The impact of temperature on the lithium battery of electric vehicles will be more or less, and the focus is on daily maintenance. High temperature will cause electric vehicles to ignite spontaneously. This statement is wrong. However, there is no straight relationship between the spontaneous combustion of electric vehicles at high temperatures in summer. When we talk about the spontaneous combustion of electric vehicles, we think it is because of the battery. Because the battery will produce a lot of heat during the charging and discharging process, if the internal temperature of the lithium battery of the electric vehicle continues to rise or the temperature between the single batteries is uneven, there will be a risk of overheating and burning and explosion. According to the information provided by experts, under the condition of a charging current of 5A, the charging time at an ambient temperature of -25°C is 63% slower than the charging time at 25°C. The influence of low temperature on the charging time of lithium batteries cannot be ignored. Excessive charging time will seriously hinder the promotion of electric vehicles. Although the low temperature environment has little effect on the discharge performance of the lithium battery, it will seriously affect the charging performance of the battery and greatly shorten the battery life. The influence of temperature on discharge performance is directly reflected in discharge capacity and discharge voltage. The temperature decreases, the internal resistance of lithium batteries increases, the electrochemical reaction speed slows, the polarization internal resistance increases rapidly, and the battery discharge capacity and discharge platform decrease, which affects the power and energy output of the electric vehicle battery. 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: Why should the lithium battery pack be managed in a balanced manner?