Information

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Fraunhofer‐GesellschaftzurFörderungderangewandtenForschunge.V.,München
Vorstand
Prof.Dr.‐Ing.habil.Prof.e.h.mult.Dr.h.c.mult.Hans‐JörgBullinger,Präsident
Prof.Dr.rer.nat.UlrichBuller
Prof.(Univ.Stellenbosch)Dr.rer.pol.AlfredGossner
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BankverbindungDeutscheBank,München
Konto752193300BLZ70070010
IBANDE86
700700100752193300
BIC(SWIFT‐Code)DEUTDEMM
USt‐IdNr.DE129515865
Steuernummer143/215/20392
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TestReportofSwivel‐HeadLampAccuLuxHL25EX
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Electrical,opticalandmechanicaltestsonHL25EXaccumulatorlightsofWitteundSutorhavebeen
performedinJune2011atFraunhoferIZM.Severalcompletelampsincludingchargerswere
investigated.Additionallithiumsecondarybatterieswhichareusedinthelampsweretested
separately.Thetestswerecarriedoutata
56‐channelbatterytesterMaccorseries4000andan
opticaltestbedwithLuxmeterLX‐1108.Thelampisdesignedforuseinexplosionprotectedareas.
AssessmentsaccordingtoECdirective94/9EGATEXwereperformedbyTÜV‐Awhichissueda
certificateonOctober8
th
2010ontheAccuLuxHL25EX.
Thefollowingresultshavebeenobtained:
1.Thelampsarefullyfunctional.Alltechnicalspecificationsandsub‐functionshavebeenfulfilled.
2.Thelightingfluxwasobtainedbasedontheangleofradiationandmeasuringtheilluminanceat
differentdistances.Theresultingfluxvaluewas
190Lumen.Undercontinuousoperationofthe
mainlampthelightfluxdoesnotdropmorethan10%forthetotalusetime.Basedonthemost
advancedpowerLEDtechnologythelampsfeatureanoutstandingbrightness.
3.Secondarybatteries:Highqualitylithiumionbatteriesareusedwhich areencapsulated
together
withthefuseandthesafetycircuit.Duringfullcharge‐dischargecyclesthecapacitydropsonly
0.052%percycle.After500cycles70%ofthenominalcapacityremains.Lowweightandlowself
dischargeratesarefurtheradvantagesofthelithiumbatteries.
4.Charging:Aconstantcurrent
constantvoltagechargingregimeisusedtoachievelongbatterylife‐
time.Thechargingtimeiswithinspecifications.Chargingcanbecarriedoutat230VoltsACaswell
as12and24VoltsDC.Iftheinputvoltagefallsbelowthe12or24Voltthresholdvalues,the
chargingstops.
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5.Discharging:Fuelgaugingisperformedathighaccuracy.TheLCDcapacityindicatorfeaturesfour
segmentswhichindicate5%,35%and70%ofdischargetime.Theautomaticswitchingtopilot‐
FraunhoferIZMDr.RobertHahn,Gustav‐Meyer‐Allee25
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13355Berlin
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Firma
Witte+SutorGmbH
SteinbergerStrasse6
D–71540Murrhardt
Deutschland
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Berlin,20.Juli2011
Fraunhofer‐InstitutfürZuverlässigkeit
undMikrointegrationIZM
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Institutsleiter
Prof.Dr.‐Ing.Dr.sc.techn.K.‐D.Lang
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Gustav‐Meyer‐Allee25
13355Berlin
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Dr.RobertHahn
GruppenleiterMikroenergie
HDI‐WLP
Telefon+493031472833
Fax+493031472835
[e-mail]
www.izm.fraunhofer.de
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