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1、第6卷第2期储能科学与技术Vol.6No.22017年3月EnergyStorageScienceandTechnologyMar.2017研究开发老化对磷酸铁锂电池在绝热条件下的产热影响1,2,31,22,32,32,31,2,3罗英,吕桃林,张熠霄,晏莉琴,刘辉,解晶莹12(哈尔滨工业大学化工学院,黑龙江哈尔滨150001;上海动力储能电池系统工程技术有限公司,上海200241;3上海动力与储能电池系统工程技术研究中心,上海200245)摘要:采用加速量热仪对不同老化状态下的磷酸铁锂电池在绝热条件下的充放电和过充电产热展开研究,并考察循环
2、次数、循环倍率、搁置时间、搁置荷电态等老化因素对锂离子电池过充特性的影响。结果表明,随着循环次数增加,电池充放电和过充电平均发热功率均增加。相比于0.5C循环,以1C倍率循环的电池过充升温幅度以及平均发热功率反而减少。这可能是由于电池在高倍率下循环形成较厚的界面膜,消耗了部分电解液,导致过充过程中可分解的电解液总量减少,从而使得放热量减少,放热平均功率降低。随着高温搁置时间增加,电池充放电和过充电平均发热功率同样增加。而满电态搁置的电池的过充升温幅度以及平均发热功率小于半电态搁置的电池。这可能与电池在高荷电态下搁置电解液量分解更多有关。在相近
3、的容量损失情况下,搁置老化对电池的充放电和过充平均发热功率的影响更大。关键词:锂离子电池;老化;绝热条件;产热doi:10.12028/j.issn.2095-4239.2016.0084中图分类号:TQ028.8文献标志码:A文章编号:2095-4239(2017)02-237-06Influenceofagingontheheat-releaseofthelithiumironphosphatebatteryunderadiabaticconditions1,2,31,22,32,32,31,2,3LUOYing,LVTaolin,ZHA
4、NGYixiao,YANLiqin,LIUHui,XIEJingying12(DepartmentofAppliedChemistry,HarbinInstituteofTechnology,Harbin150001,Heilongjiang,China;ShanghaiPower3&EnergyStorageBatterySystemEngineeringTech.Co.Ltd.,Shanghai200241,China;ShanghaiEngineeringCenterforPowerandEnergyStorageSystems,Sha
5、nghai200245,China)Abstract:AnAcceleratingRateCalorimeterwasemployedtostudytheheatreleaseoflithiumironphosphatebatterywithdifferentageingstatusunderadiabaticcondition.Thermalbehavioroflithiumironphosphatebatterychargedanddischargedat1Cwasresearched,andtheinfluenceofcyclenumb
6、er,cyclerate,storagetimeandstoragetemperatureontheoverchargetestoflithiumironphosphatebatterywasstudied.Withtheincreaseofthecyclenumbers,theaveragepowerofthebatterycharge-dischargeandoverchargeincreases.Theraisingrangeofthetemperatureandaverageheatpowerofthebatterycycledat1
7、Cisdecreased,comparedwiththatofbatterycycledat0.5C.Thismaybeduetothedecompositionoftheelectrolyteandtheformationofathicksurfacefilm,leadingtothereductionofthetotalheatandaveragepower,whenthebatteryiscycledathighrate.Withtheincreaseofthestoragetimeatthehightemperature,theave
8、ragepowerofthebatterycharge-dischargeandoverchargeincreaseaswell.Furthermore,thera