What effect does temperature have on the performance of lithium-ion batteries?

The effect of temperature on lithium batteries is obvious. High temperature will affect the life of lithium batteries, and low temperature will reduce the performance of lithium batteries. This is the current technical bottleneck faced by lithium batteries. What impact will temperature have on the performance of lithium-ion batteries? Next, the author will briefly describe; what impact will temperature have on the performance of lithium-ion batteries? There are huge differences, from the extremely cold northeast to the high temperature Hainan. Such a large temperature change will have a significant impact on the electrical performance of lithium-ion batteries. Lithium-ion batteries have achieved great success in the field of chemical energy storage by virtue of their excellent energy density, cycle life and power performance. Regarding lithium-ion batteries, there is currently no clear theory in the industry to support the inevitable relationship between internal resistance, discharge platform, life, and capacity under various temperature performance. Related calculation formulas and mathematical models are still in the groping stage. In general, lithium-ion batteries are not sensitive to the temperature in the range of 0-40°C, but once the temperature exceeds this range, the life and capacity will be compromised. Among all environmental factors, temperature has the greatest impact on the charge and discharge performance of lithium-ion batteries. Generally speaking, people in the lithium-ion battery industry know that the charging and discharging state of lithium-ion batteries is stable or not, and temperature changes play a major role. When lithium-ion batteries are charged and discharged under high and low temperature environments, the capacity retention rate of the battery is The drop. I believe everyone has similar feelings that lithium-ion batteries can be used for shorter periods of time in winter than in summer. It can be seen that the performance of lithium-ion batteries is affected by the ambient temperature, and it has also been greatly affected. If the temperature drops, the reaction rate of the electrodes also drops. Assuming that the battery voltage remains constant and the discharge current decreases, the power output of the battery will also decrease. The temperature rise is the opposite, that is, the output power of the lithium-ion battery will rise, and the temperature will also affect the transfer speed of the electrolyte. The temperature rise will speed up, the transfer temperature will drop, the transfer will slow down, and the battery charge and discharge performance will also be affected. However, if the temperature is too high, over 45, it will destroy the chemical balance in the battery and cause side reactions. When charging at a low temperature below 0°C, the internal pressure of the battery will increase and the safety valve may be opened. The low temperature environment will reduce the activity of lithium ions, which will increase the internal resistance, weaken the discharge capacity of the battery and shorten the use time. If the lithium-ion battery is in a low temperature environment for a short time, it will not damage the battery capacity. After the temperature rises, the performance will be restored. However, if the lithium ion battery is operated and charged and discharged in a low temperature environment for a long time, metallic lithium will be deposited on the surface of the battery anode, which is an irreversible process and will cause permanent damage to the capacity of the lithium ion battery. Relatively speaking, lithium-ion batteries are more prone to safety problems in high-temperature environments. Therefore, high-temperature performance tests must be performed on lithium-ion batteries and compared with their normal temperature test data. It can be seen that different types of lithium-ion batteries have different operating temperature ranges. The temperature is too high or too low will affect the performance of the lithium-ion battery, severely may even shorten the battery life. In order to charge effectively, the ambient temperature range of lithium-ion batteries should be between 5-30°C. Some special industries such as military weapons, polar scientific research, large-scale equipment, and scientific research have high requirements for low-temperature and high-temperature resistance of lithium-ion batteries. To be specially customized. It is not possible to use conventional lithium batteries as a substitute. This is not only unsafe, but may not reach the performance set by the equipment. Special customized low-temperature lithium batteries use a large number of low-temperature resistant materials. Therefore, it can be operated in extremely cold ambient temperatures, but it will actually have a certain impact on performance, but compared with conventional lithium batteries, these effects are still relatively small. Disclaimer: Some pictures and contents of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why can't the charger of lead-acid battery be used for lithium battery?