Influence of temperature on LiFePO_4 Li-ion power battery

The performance of lithium iron phosphate(LiFePO4) Li-ion battery was influenced obviously by ambient temperature.When ambient temperature was lower than 0 ℃,the internal resistance of the battery increased rapidly,the specific energy and specific power decreased rapidly,the start performance of electrical vehicle would be effected.In order to make battery group operating normally,it was necessary to assemble a thermal barrier.The internal resistance of LiFePO4 Li-ion battery was higher,which would make internal temperature of battery group being higher during working.In order to guarantee the safety operating,the cooling system would be necessary.