04

2024

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02

How much does temperature affect lithium-ion batteries?

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In all environmental factors, temperature has the greatest impact on the charge and discharge performance of lithium-ion batteries, lithium-ion batteries in high and low temperature environment charge and discharge, lithium-ion battery capacity retention rate has decreased.

In all environmental factors, temperature has the greatest impact on the charge and discharge performance of lithium-ion batteries, lithium-ion batteries in high and low temperature environment charge and discharge, lithium-ion battery capacity retention rate has decreased.

The electrochemical reaction at the electrode/electrolyte interface is related to the ambient temperature. If the temperature decreases, the reaction rate of the electrode also decreases. Assuming that the battery voltage remains the same, the discharge current decreases, and the power output of the lithium-ion battery will also decrease. The transmission temperature drops, the transmission slows down, and the battery charge and discharge performance will also be affected.

The normal operating temperature range of lithium-ion batteries is in the range of 0-40 degrees Celsius. The low temperature environment will reduce the activity of lithium ions, 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 also recover. However, if the lithium ion battery is operated and charged and discharged in a low temperature environment for a long time, metal lithium will be precipitated 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.

If the temperature rises, the opposite is true, that is, the output power of the battery will rise, and the temperature will also affect the transmission speed of the electrolyte. The temperature rise will accelerate. Lithium-ion batteries are more likely to have safety problems in high temperature environments. If it exceeds 45, the chemical balance in the battery will be destroyed. As a result, the performance of rechargeable battery materials will degrade at high temperatures, and the cycle life of the battery will be greatly shortened. This damage is also irreversible. In addition, the current lithium battery is widely used in smart phones, the temperature is too high will make the mobile phone battery packaging bulge package rupture, if the rupture of the battery chemicals and air will produce an explosion.