对优化板栅设计的VRLA电池进行研究与测试.docx
- 文档编号:28666864
- 上传时间:2023-07-19
- 格式:DOCX
- 页数:32
- 大小:1.29MB
对优化板栅设计的VRLA电池进行研究与测试.docx
《对优化板栅设计的VRLA电池进行研究与测试.docx》由会员分享,可在线阅读,更多相关《对优化板栅设计的VRLA电池进行研究与测试.docx(32页珍藏版)》请在冰豆网上搜索。
对优化板栅设计的VRLA电池进行研究与测试
ISOLAB3:
DevelopmentandTestingofVRLACellswithOptimisedGridDesignsforMildHybridApplications:
AcceleratedProgrammetoProvideBatteriesforVehicleTrialsinaHondaInsight,(ALABCProjects1012E,KA)
对优化板栅设计的VRLA电池进行研究与测试,以适用于微混动力车的应用:
为本田思域车试验提供电池(ALABC项目:
1012E)
ProgressReport,February2011
阶段性报告:
2011年2月
BannerGmbH
SalzburgerStrasse298
A-4021Linz
Austria
norbert.maleschitz@
helmut.diermaier@
thomas.haeupl@
TeckMetalsLtd
ProductTechnologyCentre
2380SpeakmanDrive
Mississauga
Ontario
L5K1B4
Canada
al.vincze@
victor.saleh@
malcolm.dewar@
FOCUSConsulting
126MainStreet
Swithland
Loughborough
LeicsLE128TJ
UnitedKingdom
g.j.may@
EXECUTIVESUMMARY
摘要
ThisprojectfollowsfromearlierworktodesignandtestVRLAcellswithanoptimisedgriddesignforuseunderhigh-ratepartialstate-of-chargecyclingforhybridelectricvehicleapplications.Computermodellingwasusedtooptimisethegriddesignandshowedthatdesignswithopposedtabsandterminalsonthetopandbottomofthecellshadthebestperformance.Prototypecellswerebuiltwithlasercutgridsfromextrudedstripwithfourvariantsofnegativeactivematerialscontainingdifferenttypesofcarbonorgraphiteadditives.Thecellshadlowrateperformancethatwasinlinewithdesignexpectationsbuttherewasvariabilityinthehighrateperformance.Inordertovalidatethedesign,cellswerebuiltwithastandardnegativeactivematerialandthesegavegoodperformancebothona17.5%depth-of-dischargetestandasimplifiedhybridelectricvehiclecycletest.Thepresentprojectseekstobuildonthesuccessoftheearlierworkbyrepeatingtheworkwithdifferentlevelsofcarbonadditioninordertodetermineifthebenefitsofefficientcurrentcollectionandcelldesigncouldbefurtherimproved.Thescopeofworkwasalsotomovefromverysmallscalegridmanufacturebylasercuttingtovolumemanufacturebypunchingandtoassemblethecellswithaconventionalcast-onstrapprocess.ThecellsweredesignedsuchthattheycouldbefittedintotheexistingbatterycompartmentofaHondaInsight.
本项目是为适用于混合动力车用在部分荷电状态下具有较好循环性能的VRLA电池的优化板栅设计项目,此板栅设计采用计算机模拟,电池壳体为偏平式,其正负极柱分别在上下槽盖的两端。
初期的电池样品负极活性物质采用了炭或石墨共四种配方,这些电池具有符合设计初衷的低速率性能,但具有高速率的差异性较大。
为进一步验证试验,采用传统负极铅膏配方重新组装电池,实验测试表明在17.5%放电深度和模拟混合动力车测试性能均较好。
目前该项目在采用前期板栅和电池壳体设计的基础上,寻找添加不同量和不同类型的炭,进一步改善电池循环性能。
本研究工作也从前期的实验室规模采用激光切割生产少量板栅,扩大到批量生产,并装配到本田思域车上进行实车试验。
Attheoutsetoftheprojectitwasdecidedtoadoptastep-by-stepapproachfromcelldevelopmenttoproducttestingandlatertovehicletrialsifthetechnicalperformancewasgoodbutstronginterestfromHondaintheprogrammeledtoanacceleratedtimescalebeingadoptedtoputabatteryinacarmuchsoonerthanoriginallyenvisaged.
起初项目计划先进行电池试验,然后在一步步进行上车跟踪测试,但本田对该项目非常感兴趣,因此加快了上车试验进程。
Thisreportsummarisescelldevelopmentandinitialelectricaltests.Thecelldesignwasmodifiedslightlytouseaflatratherthanaprofiledstripthatreducedthesectioninthetopandbottomframeareaandthelugareabutthegriddesignwasotherwiseunchanged.Gridswerepunchedwithoutdifficultyandmachinepastedonalinenormallyusedforexpandedmetalgrids.Cellswereassembledusingaconventionalcast-onstrapprocess.Theupperandlowerlidsandthetwopillarsealsweresealedbyeitheranepoxyresinorapolyurethaneadhesivebutsomeproblemshavebeenencounteredwiththereliabilityofthepillarsealwhichneedtoberesolved.
本报告总结了电池研发及初始电学测试。
电池设计采用偏平式,省略了上部和底部的框架、连接排所占的面积,板栅设计没有变化。
板栅是金属经过碾压、冲孔得到。
电池采用传统方法装配,上下电池盖及两极柱由环氧树脂或聚氨酯密封,虽然密封过程出现了一些问题,但已解决。
Preliminaryelectricaltestshaveshownsomevariabilityinthelowrateperformancebuttheyarebroadlyinlinewiththecellshavingsomewhatloweractivematerialweights.Thehigherrateperformancebothatlowandambienttemperaturesis,however,significantlylowerthanthatachievedintheearlierprojectworkandneedstobeimprovedinordertoobtainsatisfactoryvehicleperformance.Resultsfromthefirstfewcyclesinasimulatedhybridelectricalvehiclecycleshowthattwocellvariantsfailedveryquicklybutothersweresatisfactory,albeitatanearlystageoftesting.Diagnosticworknowneedstobecarriedoutinordertoidentifyaclearroutetoperformanceimprovementsandtheextenttowhichcellleakagehasconfoundedtheresults,particularlyforcycling.
初始测试结果表明电池的低倍率放电性能较好,这主要与活性物质较少有关。
电池具有较好的高低温性能,但与前期试验相比性能较差,从初期阶段模拟混合动力车循环发现有两只电池明显落后与其他电池,为提高电池性能,特别是循环性能,需要对该项目的个别电池进行诊断。
1Introduction
引言
ThisprojectfollowsfromthesuccessfuloutcomeofALABCProjectGD1.2inthe2007-2009programme[1].ProjectGD1.2hadtheoverallobjectiveofdesigning,constructingandtestingVRLAcellswithextrudedandpunchedgridsinordertooptimiseperformanceunderconditionsofhigh-ratepartialstate-of-chargecycling(HRPSoC)forhybridelectricvehicle(HEV)applications.Computermodellingwasusedtooptimisethegriddesign.Thisshowedthatdesignswithopposedtabsandterminalsonthetopandbottomofthecellhadthebestperformance.ThisdesignwasusedinacellthatwouldfitintotheexistingbatteryboxinaHondaCivichybrid.Prototypecellswerebuiltusinggridsthatwerelasercutfromextrudedstripandfourvariantsofthenegativeactivematerialcontainingdifferenttypesofcarbonorgraphiteadditives.Thelowrateperformanceofthesecellswasinlinewiththedesignrequirementsbuttherewassomevariabilityinthehighrateperformance.Inordertoverifythatthecelldesignwascorrectandtoremovethevariabilitycausedbytheuseofanumberofnegativeactivematerial(NAM)formulations,afinalbatchofcellsusingstandardactivematerialswasbuilt.Thesecellsshowedgoodperformancebothona17.5%depth-of-dischargeandasimplifiedHEVcycletest.ThiswasanimportantresultasitshowedthatimprovementstotheefficiencyofcurrentcollectioninaVRLAcellcouldprovidesubstantialimprovementsinbatterylifeunderHRPSoCconditionswithoutspecificimprovementstothenegativeactivematerialthroughtheadditionofspecialcarbons.ThepresentprogrammeofworkisnowtorepeattheworkwithcarbonadditionstotheNAMatalaboratoryscaleandtoproceedtobuildprototypeHEVbatteriesfortesting,followedbyvehicletrialswithfullyoptimisedcells.
该项目承接了ALABC的GD1.2(2007-2009)的成功结果【1】。
项目GD1.2包括对挤压、冲孔的板栅进行设计、电池结构改进及对组装的VRLA电池进行测试,以满足在部分荷电状态下高倍率(HRPSoC)循环性能的需要。
采用计算机模拟对板栅进行优化设计。
结果表明,在电池的顶部和底部设计接线端子可使电池具有最好的性能。
该设计可使电池恰当地安装在本田思域车箱内。
原始电池样品的板栅是采用挤压、激光切割,负极活性物质采用了四种不同类型的炭和石墨为添加剂。
这些电池的低倍率放电性能差别不大,但在高倍率放电下具有较大的差异性。
为验证板栅和电池接线柱的可行性,最后一批电池采用了标准配方负极活性物质的负极板进行装配。
这些电池在放电深度为17.5%和模拟HEV循环测试中都表现出了较好的性能。
这一重要结果表明,无需通过向负极活性物质中添加炭材料,而仅通过改善电池的集流体就可以明显提高VRLA电池在HRPSoC工况下的循环寿命。
目前该项目的工作是在实验室范围内根据上述方法验证负极添加炭的电池,以推进这种原始模型HEV电池的实验,其次是将这些最优化的电池进行上车测试。
ItisexpectedthatoptimisingthelevelandtypeofcarbonadditionsaswellastheprocessvariableswillprovideadditionalbenefitstoHRPSoCoperationbutitisnotknownhowmuchimprovementthiswillprovideinacelldesignthatisalreadycapableofdeliveringgoodcyclelifeundertheseconditions.Theearlierwork,togetherwithworkcarriedoutinotherALABCprogrammesinthe2007-2009timescaleprovidesagoodbasistoestablishthisreliably.
预计优化的炭材料及添加量将会进一步提高HRPSoC工况下的循环寿命,但目前还不确定添加炭这种方案会对通过改进电池设计已经提高HRPSoC工况下循环寿命的电池性能还能有多少改善。
2007-2009时间段的其他ALABC项目为该项的开展提供了很好的基础。
TheunderlyingchallengeremainstodesignVRLAbatteriesthatcanoperateinapartialstate-of-chargeatveryhighratesofchargeanddischargeovermanythousandsofcycles.Thebatterycannotbereturnedtoafullstate-of-chargeasinordertoaccepthighcurrentsonregenerativebraking,thebatterymustbeinapartiallychargedcondition.Undertheseconditions,thecyclelifeislimitedbytheaccumulationofleadsulphateinthenegativeplatethatisdifficulttorecharge.ALABCworkhasshownthattheadditionofcarbonorgraphiteinlargerquantitiesandindifferentformshasleadtosubstantialimprovementsinperformance.Similarlyimprovedbehaviourhasresultedfrombettercurrentcollectioninanumberofotherprogrammesaswellastheearlierworkcarriedonthisproject.Itisexpectedthattheoptimisationofbothsolutionswillprovidefurtherimprovements.
最基本的挑战仍然是设计VRLA电池能够在HRPSoC工况下进行数千次的循环。
电池为能够接受刹车时的大电流充电,一直会处在非满充状态,即部分荷电状态。
在这种情况下,电池的循环寿命受限于负极板硫酸铅的积累而使电池再充电困难。
ALABC项目表明向负极板中添加较多量的炭或石墨可以大幅度改善电池在该工况下的性能。
该项目的前期工作表明通过改善集流体设计同样可以提高该工况下的性能。
预计将两种方案合并将会进一步提高电池性能。
Thefirstpartoftheworkwilltaketheexistingcelldesignandoptimisecarbonadditions.Thecelldesigndiffersslightlyinsofarastheextrudedprofilewillnotbeusedbutinsteadaplainstrip.Theprinciplesestablishedearlierwill,however,bepreciselyfollowed.Thegridswillbecutbypunchingandnotbylaser.Thequantitiesofgridsandplatesthatcanbeproducedwillbeunlimitedforpracticalpurposes.Furthermore,theplateswillbeproducedbystandardcontinuousproductionmethodswhichwillincreasereliability.Earlierworkusedhandpastedplates.Bannerhavegainedexperiencefromotherworkinprocessingplatescontainingspecialcarbonadditionsandthishasnowbeenappliedtothisprogramme.Followingthecellbuild,theywillfirstbetestedatlowandhighratesofdischargetoconfirmperformanceandconsistencyandthentheywillbesubjectedtosimulatedHEVcycling.Asoriginallyplanned(Project1012E)asequentialapproachwasenvisagedtoreducecostandriskwherebyadecisionwouldbemadewiththeresultsofthefirstphaseoftheworkavailabletoproceedtoasecondphasewhereanHEVbatterywouldbeconstructedforlaboratorytesting.Depending
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 优化 设计 VRLA 电池 进行 研究 测试