Detection Of Performance Change Of Lithium Battery Based On Thermoelectric Refrigeration

With the petroleum resources more and more difficult to obtain,electric energy as a renewable pollution-free clean energy,has received more and more attention.In order to better explore the charge and discharge performance of lithium-ion battery at different temperatures and other parameter changes,this paper constructs a thermoelectric refrigeration control system,make sure the lithium-ion battery is within ± 1 ℃ of the ambient temperature.With the decrease of temperature,the change of voltage is faster,the amount of charge and discharge is less,and the change of open circuit voltage is more obvious With the decrease of charge and discharge rate,the change of voltage slows down,the time of charge and discharge increases,and the amount of charge and discharge of lithium-ion battery increases The results show that the charge time of the lithium battery decreases with the increase of cycle times in the same voltage range,and the charge time of the lithium battery decreases with the increase of cycle times After several cycles,the charging and discharging time and charge amount will slowly decrease to a fixed value,which will decrease with the decrease of temperature According to the change of the static internal resistance of the battery at the same temperature,the static internal resistance of the lithium-ion battery increases with the decrease of the charge state at a fixed temperature The results show that the internal resistance of li-ion battery increases with the decrease of temperature.