1、8.3.9設(shè)計評估-內(nèi)部強制短路（電芯）a）要求：對于圓柱電池和方形電池內(nèi)部強制短路測試不應(yīng)該起火。廠家應(yīng)該給出滿足這個要求的報告。電池廠家或者第三方測試實驗室對電池測試結(jié)束后電池廠家應(yīng)該有一個設(shè)計評估。這是國家特定的測試僅僅使用于法國、日本、韓國和瑞士，并且聚合物電池不要求此測試。b）測試：內(nèi)部強制短路測試在10c和45c（烤箱內(nèi)部的環(huán)境溫度）的環(huán)境溫度下進行，測試按照下面的方法：1）樣品的數(shù)量：5個二次電池2）充電過程i）充放電條件：電池按照廠家的要求在20±5C的條件下充電，然后在20±5C的條件下，以0.2It的電流包流放電到廠家規(guī)定的截止電流。ii）儲存過程：測試

2、電池要在表5中的環(huán)境溫度條件下儲存1-4hiii）環(huán)境溫度：表5-測試電池環(huán)境溫度a測試項目測試時最低溫度測試最高溫度b.2.ii10±2C45±2Cb.2.iv10±2C45±2Cb.3.iA5±2C50±2Cb.3.iiA10±5C45±5Ca測試通常在表4的狀態(tài)卜進行。iv）強制內(nèi)部短路的充電過程電池應(yīng)該在表5中的環(huán)境溫度下，用規(guī)定的上限充電電壓進行恒流恒壓充電，電流降至0.05It時充電結(jié)束。3）用一個鍥粒子擠壓卷心測試需要溫控烤箱和特殊沖壓設(shè)備，勻速移動沖壓設(shè)備的可移動部件，一旦檢測到短路就立即停止。i）

3、測試準備A如表5所述調(diào)節(jié)好烤箱的溫度。樣品準備指導如附錄A中的部分A.5和圖A.5與圖A.8。把帶有卷芯的鋁膜袋和鍥粒子放在烤箱內(nèi)保持45±15min。B從密封包裝中移出卷芯，用一個電壓測量儀連接電池兩端，將熱電偶黏貼在卷芯的表面。將卷芯放在沖壓設(shè)備下，使鍥粒子位于沖壓夾具下面。注意：為了避免電解液蒸發(fā)，在10min內(nèi)完成從烤箱內(nèi)移出卷芯到設(shè)備安放好并關(guān)上烤箱門的動作。C移除絕緣片關(guān)閉烤箱門。ii）內(nèi)部短路A確保卷芯的溫度顯示符合表5并開始測試B設(shè)備的可移動部分的底面是由丁月青橡膠或者亞克力板做成，該可移動部分置于10mmx10mm的不銹鋼傳動軸上。按壓夾具的細節(jié)在圖2中體現(xiàn)。丁月青

4、橡膠底面是為圓柱電池而制。對于方形電池測試，用5mmx5mm（2mm厚）的亞克力板放在丁月青橡膠上面,裝置以0.1/s的速度下移來檢測電池的電壓。當檢測到由于內(nèi)部短路引起電壓下降時，立刻停止下降并保持擠壓夾具原位不動30s,然后釋放壓力。電壓在每秒終內(nèi)要監(jiān)測超過100次并且如果電壓下降50mV,就認為有內(nèi)部短路發(fā)生。如果壓力達到800N對于圓柱電池和400N方形電池，立刻停止設(shè)備下降并保持原位置。CylindricalJISK6253TypeA)Figure2-JigforpressingC）結(jié)果標準：不起火（當電池起火時記錄壓力）8.3.9Designevaluation-Farcedint

5、ernalshortcircuit(cells)a)RequirementsForcedInternalshortcircuitt號siforcylindricalcellsandprismaticcellsshallnotcausefireCfillmarbijfaciijrfirs宮h胃IIkseparecordtnmsfittherequiremanl.A力白,d巨鼻ignpvaliMtir)nshallbedonebythecellmanufactureraftertestingisconducledbythecellmariufacturerorathirdpart/testhous

6、e.Thiscountry$pecifiGFgSfwhichi$ontypplic&bletoFrance.Japan.KoreaandSwitzerlandandisnotrequiredonpolymercells.t>)TestTheforcedinternalshortcircuitlestisperformedInachamberat+10Cand+45'Cambientinternalchambertemperature)accordingtothefollowingprocedure.1) NumberofsamplesThistestshallbecarr

7、iedoutonfivesecondary(rechargeable)lithiurn-icnceils,2Chargingprocedure1) CondilioningchargeanddischargeThesampleshallbechargedatZQ&C±5accordingtothemanufaciurer$recommendation.Thesampleisthendischargedat20Ci5ataconslantcurrenlof0h24AdowntothefinalvoltagespecifiedbyIhemanufacturer.it)Storag

8、eprocedureTestcellshallbestoredfor1hto4hatanambienttemperatureasspecifiedinTable5.iii) AmbienttemperatureTable5-AmbienttemperatureforcelltestTestitemTestatlowesttesttemperatureTestathighesttesttemperatureb.2.ll10±245±2"Cb.2.iv10±245±2cCb.3.IA5±250±2，Cb.3.iiA10i545&

9、#177;5cCaThetestisconductedusingconditionsinTable4iv) ChargingprocedureforforcedinternalshorttestTestcellshallbechargedatanambienttemperatureasspecifiedinTable5,attheupperlimitedchargingvoltageattheconstantcurrentspecifiedbythemanufacturer,continuechargingatconstantvoltageatupperlimitedchargecurrent

10、dropsto0.05/(A.3)PressingthewindingcorewithnickelparticleTemperature-controlledovenandspecialpressequipmentareneededforthetest.Movingpartofthepressequipmentshallmoveatconstantspeedandcanbestoppedimmediatelywhenshort-circuitisdetected.i) PreparationforthetestAThetemperatureoftheoveniscontrolledasspec

11、ifiedinTable5.SamplespreparationguidanceisprovidedinAnnexA.ClauseA.5andinFigureA5andFigureA.8,Putaluminum-laminatGdbagwithwindingcoreandnickelparticleIntotheovenfor45±15min.BRemovethewindingcorefromsealedpackageandattachterminalsforvoltagemeasurementandthermocouplefortemperatureonthesurfaceofth

12、ewindingcore.Setth©windingcoreunderthepressureequipmenttolocatingthepointoftheplaceofthenickelparticleunderthepressingjigRemark:Topreventevaporationofelectrolyte,finishtheworkwithin10minfromremovingthewindingcorefromtheovenfortemperatureconditioningtoclosingtheovendoorwheretheequipmentIslocated

13、.CRemoveinsulatingsheetandclosetheovendoor.ii) InternalshortcircuitAConfirmthatthewindingcoresurfacetemperatureisasdefinedinTable5andthenstartsthotest.BBottomsurfaceofmovingpartofthepressequipmentismadeofNitrilerubberorAcryl,whichisputonthe10mmx10mmstainlesssteelshaft.Thedetailofpressingjigsshallbos

14、howninFigure2.Nitrilorubberbottomsurfaceisforcylindricalcelltest.Forprismatictest5mmx5mm(2mmthickness)AcrylisputontheNitrilerubber.Thefixtureismoveddownatthespeedof0,1mm/smonitoringthecellvoltage.Whenvoltagedropcausedbytheinternalshort-circuitisdetected,stopdescentimmediatelyandkeeppressingjiginthep

15、ositionfor30sandthenreleasethepressure.Voltageismonitoredmorethan100timespersecondandifvoltageisdroppedmorethan50mVcomparetotheinitialvoltage,itisdefinedtointernalshortcircuithasoccurred.Ifthepressurereaches800Nforcylindricalcelland400Nforprismaticcell,stopdescentimmediatelyandthenkeepintheposition.

16、Cylindrical10mm21，WNitrilerubber("2mm)HardnessA60(JISK6253TypoA)PnsmaticFigure2-Jigforpressingc)AcceptancecriteriaNofire(Recordthepressurewhenshort-circuitoccurrediftherewasnofire.)A.5SamplepreparationA.5.1GeneralInordertoprovidemoreinformationregardingthesamplepreparationfortest8.3.9thefollowi

17、ngadditionaldetailsareprovided.A.5.2InsertionprocedurefornickelparticletogenerateinternalshortTheinsertionprocedureiscarriedoutat2015andunder-25ofDEWpoints.A.5.3DisassemblyofchargodcellRemovewindingcore(assembledelectrod和separator,roll,andcoil)fromthechargedcell(SeeFigureA.5andFigureA8).A.5.4Shapeof

18、nickelparticleTheshapeofnickelparticleshallbeasshowninFigureA.2.Dimensions:Height:0.2mm;Thickness:0.1mm;Lshape(Angle:90±10°):1.0mmforeachsidewith5%tolerance.Material:morethan99%(massfraction)purenickelDimensionsinmillimeters01FigureA.2-ShapeofnickelparticleA.5.5Insertionofnickelparticletoc

19、ylindricalcellA.5.5.1Insertionofnickelparticletowindingcorea)Insertionofnickelparticlebetweenpositive(activematerial)coatedareaandnegative(activematerial)coatedareaforcylindricalcell,(seeFigureA.5)1) Ifouterturnofpositivesubstrateisaluminumfoil,cutofffoilatthedividinglinebetweenaluminumfoilandactive

20、materialforactivematerialtoactivematerialshorttest,2) Insertnickelparticlebetweenpositiveactivematerialandseparator.ThealignmentofnickelparticleshallbeasshowninFigureA.3Positionoftheinsertionofnickelparticleshallbeat20mmfromedgeofthecutaluminumfoil.DirectionofL-shapedcorneristowardsthedirectionofwin

21、ding.WidthFigureA.3-NickelparticleInsertionpositionbetweenpositiveandnegativeactivematerialcoatedareaofcylindricalcellInsertionofnickelparticlebetweenpositivealuminumfoil(uncoatedarea)andnegative(activematerial)coatedareaforcylindricalcell.Whenaluminumfoilofpositiveelectrodeisexposedatouterturnandth

22、ealuminumfoilisfacingthecoatednegativeactivematerial,followingprocedureshallbeused.1) Whenaluminumfoilofpositiveelectrodeisexposedatouterturn,cutoutthealuminumfoilat10mmfromthedividinglinebetweenaluminumfoilandactivematerial.2) InsertNiparticlebetweenaluminumfoilandseparator.Thealignmentofnickelpart

23、icleshallbeshowninFigureA.4.Positionoftheinsertionofnickelparticleshallbeat1,0rrmfromtheedgeofthecoatingofpositiveactivematerialonaluminumfoil.FigureA.4-NickelparticleinsertionpositionbetweenpositivealuminumfoilandnegativeactivematerialcoatedareaofcylindricalcellPositivetabNegativelabInsulatingsheet

24、22G42FigureA.5-DisassemblyofcylindricalcellA.5.5.2MarkthepositionofnickelparticleonthebothendofwindingcoreoftheseparatorTheprocedureisasfollowsa) Placeinsulatingsheetbetweentheseparatorthatisfacingtonickelparticleandthenegativeelectrodetoprotectagainstshort-circuitsb) Manuallyrollbacktheelectrodesan

25、dseparatorkeepingthenickelparticleinplaceandapplyadhesivetapetothewindingcore.c) Markpositionofthenickelparticleacrossthewindingcore.d) Putwindingcoreinapolyethylenebagwithsealingzipperandsealit.Putthepolyethylenebagintoaluminum-laminatedbagtopreventfromdryingout.Remark:Procedureshallbecompletedwith

26、in30min.A.5.6Insertionofnickelparticletoprismaticcella) Priortoinsertingnickelparticle,insertaninsulatingsheetbetweenthenegativeelectrodeandtheseparatorthatisbelownickelparticleandthenegativeelectrode,asshowninFigureA.6.toprotectagainstshort-circuit.b) Insertionofnickelparticletowindingcore1) Insert

27、ionofnickelparticlebetweenpositive(activematerial)coatedareaandnegative(activematerial)coatedareaforprismaticcell.(seeFigureA8)i) Insertnickelparticlebetweenpositive(activematerial)coatedareaandseparatororbetweenseparatorandnegative(activematerial)coatedarea.Incaseofaluminumcellenclosure,insertnicke

28、lparticlebetweenpositive(activematerial)coatedareaandseparator.ii) Insertnickelparticlebetweenpositiveactivematerialandseparator.ThealignmentofnickelparticleshallbeshowninFigureA.6.Nickelparticleissetatthecenter(diagonally)ofthewindingcore.DirectionofnickelparticleL-shapecorneristowardsthedirectiono

29、fwinding.PosliveAlfoilNiparticlePositiveacbvematerialcoatedSeparator/£C2?W2FigureA.6-Nickelparticleinsertionpositionbetweenpositiveandnegative(activematerial)coatedareaofprismaticcell2)Insertionofnickelparticlebetweenpositivealuminumfoil(uncoatedarea)andnegative(activematerial)coatedareaforpris

30、maticcell.WhenaluminumfoilofpositiveelectrodeIsexposedatouterturnandthealuminumfoilisfacedtocoatednegativeactivematerial,thefollowingtestshallbeperformed:i) Thealuminumfoilofpositiveelectrodeisexposedatouterturnandthealuminumfoilisfacedtocoatednegativeactivematerial,insertnickelparticlebetweenaluminumfoilandseparator;ii) Thealignmentofnickelpar