基于电感电容的锂离子电池组双层均衡方法

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Lithium-ion battery pack double-layer equalization method basedon inductorsand capacitors

MU Yuhong，TIAN Guofu，WU Ziyao （SchoolofMechanical Engineering，ShenyangUniversityof Technology，Shenyang11O87o，China）

Abstract：Theinconsistencyoflithium-ionbaterypacksreducescapacity，shortensservicelife，andevenposessafety risks.Therefore，efectiveequalizationtechniquesmustbeintroducedtomitigatetheimpactof inconsistency.Adouble-layer equalizationmethodisproposedtoimprovetheequalizationspeedfseris-coectedlithium-iobaterypacks.Inthisethod， asingle-nductorequalizationstructureimprovedonthebasisofthetraditionalBuck-Boostcircuitisemployedforthebottom circuit，whileaninductor-capacitorseries-conectedstructureisadoptedforthetopcircuit.BytakingthebaterySOC（stateof charge）as theequilibriumtargetvariable，adouble-layerequalizationcontrolstrategyadaptedtothetopologyisestablished basedonthediference-average metod.Experimentswithsix ternarylithium-ionbateriesonthe Matlab/Simulinkplatformshow thatthedouble-layerequalizationcontrolmethodcanimproveequalizationspeedby14.5%，15.2%and13.2%intheresting， charginganddischargingstates，respectively，inombinationwiththetraditionalBuck-Bostqualizatiomethod.Iisoied that the proposed method can improve the equalization speed of battery packs.

Keywords：lithium-ion batery pack；dual-layerequalization method;SOC;equalizationspeed;Buck-Boost circuit;active equalization

0 引言

随着我国“双碳”目标的全面推进，电动汽车的普及程度正迅速提高[1-2]。（剩余7259字）