锂离子电池组的内阻在线检测系统的设计

:(1982-),,,,:,;(1976-),,,,:;(1971-),,,,:1,2,1,2,1,2(11,200050;21,100049):,,,10%:;;;:TM91219:A:1001-1579(2007)02-0130-03ThedesignedofonlinedetectionsystemforinternalresistanceofLi2ionbatteriesLEIJuan1,2,JIANGXin2hua1,2,XIEJing2ying1,2(11ShanghaiInstituteofMicrosystemandInformationTechnology,ChineseAcademyofSciences,Shanghai200050,China;21GraduateSchooloftheChineseAcademyofSciences,Beijing100049,China)Abstract:ItwasnecessarytodetecttheinternalresistanceintheapplicationofLi2ionbatteries1ACinternalresistancetestmethodofthebatterywasimproved1Theinternalresistancedetectionmethodforsinglebatterywasusedintheinternalresistancedetectionofbatteriesinseries,andtheLi2ionbatteriesinternalresistanceonlinedetectionsystemwasdesigned1Phaselockloopandbenchmarkresistancecompensatingtechnologieswereusedtoimprovethedetectionprecision,theerrorwaslessthan10%1Keywords:ACinternalresistancetestmethod;Li2ionbatteries;internalresistancedetection;phaselockloopcircuit,[1],:,,,,,;,(1kHz,50mA),,,,,[2],[3],,,,;,,110(5Ah),11Fig11TheschematicdiagramofACinternalresistancetestmethod1kHz50mAI,RC37220074BATTERYBIMONTHLYVol137,No12Apr1,2007,V/IRz,UsRfUf,,A/D,,,10111ATMELAD630,(Rb),,22Fig12PhasesensitivedetectioncircuitAD630UsUfAD630,Uo:Us=|Rb|Bsin(2f1t+1)(1)Uf=RAsin(2f2t+2)(2):Uo=|Rb|RAB2cos2f1-f2t+1-2-cos2f1+f2t+1+2(3),UsUf,,,:Uo=|Rb|RAB2cos[2(f1-f2)t+(1-2)](4):|Rb|cos(1-2)=2Uo/(RfAB)(5):Rf,ABRf;f11f22Rf,f1=f2Uo,RfAB,112103,,,S11S21S22,B1S11,B1S21S22,,Ub;,S12S22S23,B2,,B101040V,,Xc,C,,,3Fig13ThecycledetectioncircuitofLi2ionbatteries,44Fig14Voltagedifferentialamplifiercircuit,,,,113,Rc1Rc2,,Uoc1Uoc2,:Uo/Uoc1=(R+Rx)/(Rc1+Rx)(6)Uoc1/Uoc2=(Rc1+Rx)/(Rc2+Rx)(7):R=(Rc1-Rc2)(Uo-Uoc2)/(Uoc1-Uoc2)+Rc2(8):Rx,UoUoc1Uoc2A/D,Rc1Rc2Rx,5,1312,:5Fig15Detectionerrorcausedbythebasicresistance:,,50m100m(1%),015%,,10,10,,(),,,,Uoc1Uoc2114,ATMEL89C51A/D66Fig16FlowchartofMCUworking,,S0S1S2S3=0001,B1,,,,A/D12A/DMAX187,12,S0S1S2S3=0010,B2,,B10;,Uoc1Uoc2,Rb,,,210,1,DK3000A()1Table1DetectionresultsoftheinternalresistanceofLi2ionbatteries/m/m/%122172216014223182215518322132217117424122217616525102218916623162216414723162219212821182217319921192216311102019221361310%,:a1,,,,,b1,,,c1,,,310,,,,:[1]HUANGKe2long(),LUZheng2zhong(),LIUSu2qin()1[J]1BatteryBimonthly(),2001,31(3):142-1451[2]LILi2wei(),ZOUJi2yan()1[J]1MeasurementTechnique(),2002,(12):15-171[3]1[P]1CN:2004Z001917613,2005-08-101:2006-09-14231BATTERYBIMONTHLY37