Why do pure electric vehicle batteries need to be warmed up?

Why do pure electric vehicles need to heat the battery? Friends who drive fuel vehicles know that fuel vehicles are hot in the winter. Although the technology continues to improve, it is rarely idling and hot cars in the first two or three times. For kilometers, keep a constant speed as much as possible. Don’t force the drive to extend the service life of the engine. The same is true for today's all-electric vehicles, where the power lithium-ion battery needs to be heated. Due to the low temperature in winter, the battery life of electric vehicles is generally greatly reduced. The important reason is that the viscosity of the battery electrolyte increases under low temperature conditions. The electrolyte between the positive electrode and the negative electrode of the lithium battery serves as a conductive ion, which also ensures that the lithium battery can obtain the advantages of high voltage and high specific energy. Therefore, the increase in electrolyte viscosity will lead to a decrease in the charge and discharge function of the battery. This can be effectively alleviated by preheating the battery. Regarding battery preheating, each manufacturer has different technologies. Some install heaters around the battery, and some heat the battery by heating the coolant, all in order to keep the battery at a normal operating temperature. It should be noted that although there is a preheating method under the condition of too low temperature, charging and discharging will also damage the battery. However, in the process of using cars, there is no clear demand for hot cars. But in order to ensure the driving distance, drive in low temperature conditions, try to develop good driving habits, and prevent violent collision driving on the switch. Because this will not only lead to reduced battery life, but also damage due to rapid discharge of the battery, thereby shortening the power life of the battery. When it comes time to actually replace the battery, it is really a small loss. What do you think? Welcome to leave a message to discuss. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of lithium battery electric bicycles?