As an Emergency Lighting Battery Supplier, share with you. What are the effects of different temperatures on the performance of lithium batteries? Regardless of the shape of the battery, the effect of temperature on it should not be underestimated. Different temperatures will affect the safety, life, function and performance of lithium batteries. As the temperature has a great influence on the lithium battery, it is necessary to control and adjust the temperature in a timely manner so that the maximum efficiency of the battery can be exerted.
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What are the effects of different temperatures on the performance of lithium batteries?
Lithium-ion batteries have achieved great success in the field of chemical energy storage due to their excellent energy density, cycle life and power performance. Our country has a very wide geographic area, and the climate varies greatly from place to place. There are extremely cold northeast and high temperature Hainan. Such large temperature changes will have a significant impact on the electrical performance of lithium-ion batteries.
For lithium batteries, there is currently no clear theory in the industry to support the inevitable connection of internal resistance, discharge platform, life, and capacity under various temperature performance. The relevant calculation formulas and mathematical models are still in the groping stage. In general, lithium 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.
I believe everyone has similar feelings that lithium batteries can be used for shorter periods in winter than in summer. It can be seen that the performance of lithium batteries is affected by ambient temperature. Among all environmental factors, temperature has the greatest impact on the charge and discharge performance of lithium batteries. Generally, people in the lithium battery industry know whether the charge and discharge state of lithium batteries is stable or not, and temperature changes play a major role. When lithium batteries are charged and discharged under high and low temperature environments, the capacity retention rate of lithium batteries will decrease. .
The electrochemical reaction at the electrode/electrolyte interface is related to the ambient temperature, and the electrode/electrolyte interface is regarded as the heart of the battery. 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.
If the temperature rises, the opposite is true, that is, the output power of the lithium 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, exceeding 45, it will destroy the chemical balance in the battery and cause side reactions.
Charging at low temperatures below 0 will increase the internal pressure of the battery and open the safety valve when possible. The low temperature environment will reduce the activity of lithium ions, which will increase the internal resistance, weaken the battery discharge capacity and shorten the use time. If the lithium battery is in a low temperature environment for a short time, it will not damage the battery capacity.
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