EM1402 Evaluation Module - TI.com

1 1 SNOU143 February2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedEM1402 EvaluationModuleUser's GuideSNOU143 February2017EM1402 EvaluationModuleThisuser'sguidedescribes the generalfeatures,theoryof operation,hardwaresetup,and use of user'sguide,the abbreviationsEVM, EM1402 EVM, and the termevaluationmoduleare synonymouswith theEM1402 EvaluationModule, anevaluationboardof theActiveBalancechipsetfor use in largeformatLithium-ionbatteriesthat providesmonitoring,balancing,and of (ReferenceImageOnly).

2 63 Molex22-12-4062(ReferenceImageOnly)..74 TycoElectronics43045-1601(ReferenceImage Only)..85 TycoElectronics1452625-1(ReferenceImageO nly).. of February2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedEM1402 EvaluationModuleTrademarksLaunchPad,Code ComposerStudioare trademarksof othertrademarksare the propertyof (TI HV EVM)UserSafetyGuidelinesWARNINGW arning:To minimizerisk of fire hazard,alwaysverifyand followanyspecificsafetyinstructionsandap plicationconsiderationsrelatedto the batteriesbeingusedin conjunctionwiththis s set-upand applicationinstructions,includinguse of all interfacecomponentswithintheirrecommende delectricalratedvoltageand electricalsafetyprecautionsto helpensureyourpersonalsafetyand the safetyof thoseworkingaroundyou.

3 ContactTI s ProductInformationCenterhttp:// warningsand instructionsfor followwarningsand instructionsmayresultin personalinjury,propertydamage,ordeathdue to termTI HV EVMrefersto an electronicdevicetypicallyprovidedas an openframed, is intendedstrictlyfor use in developmentlaboratoryenvironments,solely for qualifiedprofessionalusershavingtraining ,expertise,and knowledgeof electricalsafetyrisksindevelopmentand applicationof otheruse or applicationare strictlyprohibitedby you are not suitablyqualified.

4 You shouldimmediatelystop fromfurtheruse of the HV :1. Keepworkareacleanand Qualifiedobserver(s)mustbe presentany time circuitsare Effectivebarriersand signagemustbe presentin the areawherethe TI HV EVMand its interfaceelectronicsare energized,indicatingoperationof accessiblehigh voltagesmay be present,for thepurposeof All interfacecircuits,powersupplies,evaluati onmodules, instruments ,meters,scopesand otherrelatedapparatususedin a developmentenvironmentexceeding50 VRMSor 75 VDCmustbeelectricallylocatedwithina protectedEmergencyPowerOff (EPO)

5 Use a stableand Use adequatelyinsulatedclampsand wiresto attachmeasurementprobesand :As a precautionarymeasure,it is alwaysa goodengineeringpracticeto assumethatthe entireEVMmay havefully accessibleand activehigh De-energizethe TI HV EVMand all its inputs,outputs,and electricalloadsbeforeperforminganyelectr icalor TI HV EVMpowerhas Withthe EVMconfirmedde-energized,proceedwith requiredelectricalcircuitconfigurations, wiring,measurementequipmenthook-upsand otherapplicationneeds,whilestill assumingtheEVMcircuitand measuringinstrumentsare OnceEVMreadinessis complete.

6 Energizethe EVMas February2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedEM1402 EvaluationModuleWARNING:whilethe EVMis energized,nevertouchthe EVMor its electricalcircuitsas theycouldbe at highvoltagescapableof :1. Wearpersonalprotectiveequipment,for example,latexglovesor safetyglasseswith side shieldsor protectEVMin an adequatelucentplasticbox with SafeUse:1. EVMsare not to be usedas all or part of a TexasInstrumentsEM1402 EVMB atteryManagementSystem(BMS)is an evaluationboardof theActiveBalancechipsetfor use in largeformatLithium-ionbatteriesthat providesmonitoring,balancing,and robustactivebalancing,theActiveBalanceBM Sis capableof bi-directionalpowertransferat eachcell.

7 EachEM1402 EVMcan manage6 to 16 cells(70-Vmax)for EM1402 EVMmodulescan be stackedup to 1300V. The systemprovidesfastcell balancing,diagnostics,and moduleto EM1402 EVMis equippedwith precisionmeasurementand synchronouscommunicationto enableamastercontrollerto performStateof Charge(SOC)andStateof Health(SOH) voltagesand a fast samplingtime for the entirebatterypackallowsmoreefficientoper ationof batterymodulesand moreaccurateSOCand userwill be able to extendthe availablecapacityof the batteryand will benefitfromlongerpacklifetimesversuspass iveor EM1402 EVMis equippedwith eventssuchasundervoltage,overvoltage,and systemis also capableof packtemperatureand fault flaggingsystemshelp protectthe batterymoduleand alertthe FeaturesThis EVMincludesthe followingfeatures.

8 Activebi-directionalcell balancing Multi-cellchargeand dischargecapability Isolatedcommunications(5 kV) Flexiblearchitecturefor up to 16 cells UART interface Highaccuracycell voltagemeasurement ElectricalParametersThe followingtableidentifiesthe key electricalparameters:Maximumbatterypackv oltage1300 VMaximumoperatingvoltage70 VMinimumoperatingvoltage12 VMaximumcell opencircuitvoltage5 VAmbienttemperature-40 C to 85 CNominaloperatingtemperature-20 C to 60 CCell balancingcurrentup to +/- 5 A-+-+-+Switch Matrix871-+16 Differential MUXADC116 Vtop116 GPIOS witch Matrix3 5 A (max)91 Active Cell Balancing (3x EMB1428Q + EMB1499Q)Cell Fault DetectionCell Monitoring (Voltage)

9 Power Module 1 Cell Module nPack +Pack -BMS Module 1 UART TX/RXWAKEUPBMS Module 2 Cell Module 2+-+-OVUV7+-OTIC Temp127 Remote Temp InputsMicrocontrollerFAULT_NCOMM busFAULT busMUXbq76PL455A-Q1 Monitor + Protector2 Switch Matrix1016 SPID aisy-Chain CommsIsolated 12 VBMS Module 1 Isolated 12 VVP RegulatorDaisy-Chain Comms12 VFCOMM busFAULT busCopyright 2017, texas instruments IncorporatedTheoryof February2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedEM1402 EvaluationModule3 Theoryof OperationFigure1 showsthe Operation5 SNOU143 February2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedEM1402 EvaluationModuleThe BMSsystemis designedto prolongthe usefullife of lithium -ioncellsin batterypackis brokeninto a seriesof modules.

10 Eachof whichcontainsup to 16 monitorvoltagesof individualbatterycellsand transferchargefromthe modulestackto anunder-chargedcell or take chargefroman over-chargedcell and transferit to the BMSallowsbatterypoweredelectricmachinest o use smallerbatterypacksand use fewerchargingcyclestoperformthe sameamountof also improvesthe overalllifetimeof Li-ionbatterypacksbypreventingunder-and BMSsystemhas threemainsub-systems,as shownin Figure1: Cell voltagemonitoringcircuitry Cell fault detection Activecell balancingengineThe cell-monitoringarchitectureis basedon the bq76PL455A-Q1(16 cell monitorand protection).