基于電感電容的鋰離子電池組雙層均衡方法

打開文本圖片集

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

隨著我國“雙碳”目標(biāo)的全面推進(jìn)，電動汽車的普及程度正迅速提高[1-2]。（剩余7259字）