Influence Factor Analysis of High Power Li-ion Battery Life on Activation Energy
In order to analyze the influence factors of life on mechanism level,the calendar and cycle life data of different external influencing factors were taken as samples,and combined with Arrhenius equation,the assessment method on activation energy was established to analysis the life effect.The results showed that state of charge(SOC)of storage has a great influence on calendar life,and the stability of batteries is the worst,and fade fastest while storage SOC of lithium iron phosphate battery is around 70％.Current is an important factor affecting the cycle life of lithium iron phosphate battery,and the SEI film reaction and the consumption of active lithium will be accelerated under heavy current,the activation energy of the battery reduces,and cycle life will be aggravated.The SOC ranges of charging and discharging has little impact on cycle life of high power battery,and the battery can be used in any SOC ranges within 20％-90％.The understanding of life characteristics of high power battery has been improved through the analysis of the factors affecting the life of power battery and the attenuation reasons,and provided a scientific basis for the long-term use of power battery.
calendar lifecycle lifeactivation energycurrentstate of charge(SOC)
万方数据
维普
