What does battery preheating mean? What are the uses of battery preheating?

Whether it is a lithium iron phosphate battery or a ternary lithium ion battery, in a low-temperature environment, it will be affected by the activity of the positive and negative materials and the decrease in the conductivity of the electrolyte. From the results, the charging time will increase accordingly, and the battery will be more difficult to fully charge. During use, the power-down speed of the power lithium battery pack will be significantly increased. Therefore, in order to solve the above problems, engineers developed a battery preheating system and a thermal management system. By adjusting the temperature of the battery pack, the influence of the ambient temperature on its appearance can be reduced. At present, the battery pack pre-heating methods can be roughly divided into two types, namely, external heating and internal heating. The former is important to upgrade the battery method as soon as possible through additional heating devices, while the latter uses alternating current to directly stimulate the internal chemical substances of the battery to make the battery itself heat up. What kind of battery preheating is used? Battery pre-heating technology is an important part of battery thermal management. It is a technology that can quickly raise the battery temperature to the best operating temperature when the battery temperature is low. Because the temperature in winter is too low, it is difficult to fully charge the battery of electric vehicles, and it is also difficult to discharge them. Electric vehicles can be solved by installing a car parking heater to preheat the battery pack of new energy vehicles to normal working temperature. New energy electric vehicles have reduced endurance in low-temperature environments in winter to prevent damage to battery packs caused by low-temperature charging. The important usage scenarios of battery preheating are more concentrated in the winter in northern cities. Important usage scenarios still include two directions, discharge and charging scenarios. After the vehicle is left in a low temperature environment for a period of time, the vehicle is started. At this time, the battery temperature is low, which seriously affects the driving experience and feeling of the vehicle. If you go to the charging pile for charging at this time, it will also seriously affect the charging efficiency. Therefore, in the start-up and shutdown strategy of the battery pack preheating, detailed temperature calibration is required to achieve a better use effect, not waste resources, and meet the customer's use scenarios. 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: What are the requirements for negative electrode materials for lithium-ion batteries