What effect does temperature change have on the charging and discharging performance of lithium batteries?

What kind of effects do the detailed temperature changes of lithium battery manufacturers have on the charging and discharging functions of lithium batteries? The influence of temperature on the battery discharging functions is directly reflected in the discharge capacity and discharge voltage. The temperature drops, the battery internal resistance increases, the electrochemical reaction speed becomes slower, the polarization internal resistance increases, and the battery discharge capacity and discharge path decrease, which affects the battery power and energy output. Secondly, what are the effects of the detailed temperature changes of the lithium battery manufacturers on the charging and discharging functions of the lithium batteries? What are the effects of the detailed temperature changes of the lithium battery manufacturers on the charging and discharging functions of the lithium batteries? The charging power is affected by the charging ratio and the ambient temperature. The charging current must be within a certain range during charging. If the current is too small or too large, the charging rate will decrease. Discharge power refers to the ratio of the actual discharge volume released from the discharge to the end of the discharge voltage to the rated capacity under a certain discharge condition. It is mainly affected by the discharge rate, ambient temperature, internal resistance and other factors. In general, the higher the discharge rate, the lower the discharge power. The lower the temperature, the lower the discharge power. Generally, battery professionals know that the charging and discharging of lithium batteries are stable, and temperature changes have a great impact on the components. When charging and discharging lithium batteries in high temperature environments, the capacity rate of lithium batteries has decreased. 1. If the temperature drops, the internal reaction rate of the lithium battery will decrease, and the output power of the battery will also decrease; assuming that the temperature rises in the opposite direction, that is, the output power of the lithium battery will also increase. 2. However, if the temperature is too high to exceed 60°C, the chemical balance in the battery will be destroyed and side uses will occur; at high temperatures, the performance of the rechargeable battery material will deteriorate, and the service life of the battery will be greatly shortened. 3. Under various environmental factors, the ambient temperature has a great influence on the battery's charge and discharge function, because the electrochemical reaction of the electrode/electrolyte interface is related to the ambient temperature. The electrode/electrolyte can be called the heart of the battery; as the temperature decreases, the electrode's reaction rate also decreases. Changes in temperature directly affect the discharge function and discharge capacity of lithium batteries. The temperature drops, the battery internal resistance increases, the electrochemical reaction speed becomes slower, the polarization internal resistance increases, and the battery discharge capacity and discharge path decrease, which affects the battery power and energy output. Many battery users don’t know that consumer lithium batteries cannot be charged below zero. Although the battery pack seems to be charged normally, metal lithium plating may appear on the anode during low-temperature charging, which is permanent and will not be eliminated with the charging cycle. Assuming that lithium batteries are exposed to oscillations or other stress conditions, lithium batteries have more short-term shortcomings, and advanced chargers can prevent lithium batteries from being charged at temperatures below freezing. Regarding lithium batteries, the discharge capacity drops sharply under low temperature conditions, but the discharge capacity under high temperature conditions is not lower than normal temperature, and sometimes slightly higher than normal temperature capacity. First of all, lithium ions move faster under high temperature conditions. Lithium electrodes are not like nickel electrodes. Like the hydrogen storage electrode, the capacity decreases under high temperature decomposition or formation of hydrogen gas. When the battery module is discharged at a low temperature, it will follow the discharge. Due to resistance and other reasons, heat will increase the temperature of the battery, which is manifested as an increase in voltage. The best working temperature of lithium battery is 0~35℃, low temperature environment will reduce the activity of lithium ion, the discharge capacity of the battery will become weak, and the use time will be shortened; assuming that the lithium battery is exposed to low temperature for a short time, this damage is only temporary. Will not cause damage to battery capacity. When the temperature rises, the function will be restored. 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: Why do pure electric vehicles generally use lithium batteries?