source:Geerady       date: 2022-06-17
The rated capacity of the battery is usually specified at ambient temperature at 25 ¡ã C and in the predetermined discharge rate. The battery is 25 ¡ã C, when the battery discharge operating temperature is not 25 ¡ã C, due to the effect of electrochemical, the actual capacity should be converted into a 25 ¡ã C reference temperature according to the formula 1:
Be
CE = CT / [1 + K (T-25)] (Equation 1)
Be
Where: CT is the measured capacity (V); CE is a nominal capacity (V) (V) at ambient temperature of 25 ¡ã C; T is the actual ambient temperature (¡ã C); k is a temperature coefficient, 10 hour rate capacity experiment time k = 0.006 K = 0.008 / ¡ã C in K = 0.008 / ¡ã C, 1 hour rate capacity experiment during 1 hour ratio of K = 0.01 / ¡ã C.
Be
As can be seen from Equation 1, when the ambient temperature is higher than 25 ¡ã C, the actual release capacity CT> of the battery is designed for the rated capacity Ce; when the ambient temperature is less than 25 ¡ã C, its actual release capacity CT is lower than the design rated capacity. CE. It can also be seen from the value of temperature coefficient k, the larger the discharge rate, the greater the effects of temperature on the capacity.
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