Research on the acceleration model of lithium ion battery
CHEN Dandan
XIA Yujia
WU Huanhuan
SONG Linfei
ZHU Zhendong
Abstract：The cycle life test of lithium iron phosphate-graphite batteries was conducted under different temperatures(35℃,45℃,55℃)and different rates(0.5 C,1 C,1.5 C)to study the influence of these acceleration factors on the cycle life and establish an accelerated model.The research results show that the capacity plunge occurs under different acceleration conditions,and the capacity fading curves conform to the double-power law function.Based on the double-power law function,fitted the capacity fading curves,and the cycle life characteristic parameters are extracted to establish the accelerated model of the battery.At different temperatures,the life characteristic parameters and temperature conform to the Arrhenius relationship.Under different rates,the logarithm of the life characteristic parameters and the rate conform to a linear relationship.By using the acceleration model,the attenuation law of the battery under low acceleration factors can be obtained,and the cycle life of the battery can be predicted.The errors of the temperature acceleration model and the rate acceleration model are 7.4% and 4.0%,respectively.
Keywords：acceleration modelcapacity plungedouble-power law functioncycle life
Publication Date：2026-02-25
Online Publishing Date：2026-03-13(First online date of this platform, not the publication date of the document)
Pages：6( 24-29 )