When the ambient temperature is higher than 25 °C and lower than 55 °C, the discharge capacity of lithium ion batteries with different cathode materials is relatively high. Considering the discharge efficiency and cycle life, the optimal operating temperature of a lithium ion battery is 20–50 °C.
The optimal operating temperature of lithium ion battery is 20–50 °C within 1 s, as time increases, the direct current (DC) internal resistance of the battery increases and the slope becomes smaller. Between 1 s and 10 s, the DC internal resistance of the battery basically shows a linear relationship with time.
At −40 °C, the capacity of the lithium iron phosphate battery is 46.6%, the capacity of the lithium manganate battery is 36.8%, and the capacity of the lithium cobalt oxide battery is 11.7%.
At high temperature (≥50 °C) or low temperature (≤20 °C), the capacity of lithium-ion power batteries decreases in varying degrees. When the temperature is above 0 °C, the discharge capacity of lithium-ion batteries can basically be maintained above 93.4%.
Through the comprehensive analysis of the above charts, it can be seen that regardless of whether the cathode material is lithium iron phosphate, lithium manganate or lithium cobalt oxide, the discharge capacity of a lithium ion battery will decrease as the temperature decreases at low temperatures [25, 26].
Multiple requests from the same IP address are counted as one view. Temperature is considered to be an important indicator that affects the capacity of a lithium ion batteries. Therefore, it is of great significance to study the relationship between the capacity and temperature of lithium ion batteries with different anodes.
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The optimal operating temperature of lithium ion battery is 20–50 °C within 1 s, as time increases, the direct current (DC) internal resistance of the battery increases and the …
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