用于光伏系统的锂离子蓄电池设计

XinyuUniversity项目课程用于光伏系统的锂离子蓄电池设计学生姓名:万洪亮学号:1303230020专业:新能源材料与器件班级：13新能源材料与器件指导教师:周小英讲师学院:新能源科学与工程江西·新余摘要I项目课程：用于光伏系统的锂离子蓄电池设计专业：新能源材料与器件学生姓名：万洪亮指导教师：周小英讲师摘要锂离子电池是一种充电电池，它主要依靠锂离子在正极和负极之间移动来工作。在充放电过程中，Li+在两个电极之间往返嵌入和脱嵌：充电池时，Li+从正极脱嵌，经过电解质嵌入负极，负极处于富锂状态；放电时则相反。一般采用含有锂元素的材料作为电极的电池，是现代高性能电池的代表。锂离子电池是新型绿色环保蓄电池，主要结构分为正极、负极、电解液、隔膜。当放电时，锂离子从负极释放出进入正极，充电时，锂离子从正极释放进入负极。与其他蓄电池相比，锂离子电池的主要优点是储能密度高(300～400kWh/m3，130kWh/t)，储能效率高(接近100%)和使用寿命长(每次放电不超过储能的80%时可充3000次)。由于具有上述优点，锂离子电池得到快速发展，在几年之内锂电池已经占有小型移动设备电源市场份额的60%以上。由于锂离子电池能量密度高，大规模集成后的安全性值得重点关注。这就需要从原材料的选用、单体电池结构的优化改进、制程过程的控制、电池管理系统、储能系统监控保护系统等各个环节层层把关，同时针对风电场、光伏电站的负荷波动规律，对电池和系统做到实时状态检测和故障分析，保障储能系统运行的安全性和可靠性。关键词：光伏发电系统；蓄电池；锂离子电池目录ITitle:DesignoflithiumionbatteryforphotovoltaicsystemSpecialty:NewenergymaterialsanddevicesApplicant:HongLiangWanSupervisor:Prof.XiaoYingZhouABSTRACTLithiumionbatteryisarechargeablebattery.Itmainlydependsonlithiumioninbetweentheanodeandthecathodemovetothework.Intheprocessofchargeanddischarge,Li+betweenthetwoelectrodesround-tripembeddinganddeintercalation:rechargeablebatteries,Li+fromthecathodedeintercalation,throughtheelectrolyteintothecathode,anodeinlithiumrichstate;dischargeonthecontrary.Commonlyusedasabatteryelectrode,isrepresentativeofthemodernhighperformancebatteriescontaininglithiummaterial.Lithiumionbatteryisanewtypeofgreenenvironmentalprotectionbattery,thestructureismainlydividedascathode,cathode,electrolyteandseparator.Whenthedischarge,lithiumionsfromthecathodereleaseintothecathode.Whencharging,thelithiumionsfromthecathodereleaseintotheanode.Comparedwithotherbattery.Themainadvantagesofthelithiumionbatteryisenergystoragedensityhigh(300~400kWh/m3130kwh/T)andenergystorageefficiencyishigh(closeto100%)andtheuseoflonglife(nomorethan80%ofenergystorageforeachdischargecharge3000times).Becauseoftheseadvantages,thelithiumionbatterygetrapiddevelopment.WithinafewyearslithiumbatteryHasoccupiedasmallmobiledevicepowermarketshareofmorethan60%.Duetothehighenergydensityofthelithiumionbattery,thesafetyoflarge-scaleintegratedworthyoffocus.Thisrequiresfromtheselectionofrawmaterials,improvementandoptimizationofsinglecellstructure,processcontrol,batterymanagementsystem,energystoragesystemmonitoringandprotectionsystemandsooneachlinklayerchecks,andforawindfarm,theloadfluctuationsofthephotovoltaicpowerstation,tothebatterysystemandachievereal-timestatusdetectionandfaultanalysis,securitystoragesystemoperationsafetyandreliability.KEYWORDS:Photovoltaicpowergenerationsystem;battery;lithiumionbattery目录II目录1绪论.........................................................................................................................11.1太阳能光伏发电系统1.1.1太阳能发电系统的发电原理...........................................................................11.1.2发电系统的组成...............................................................................................11.1.3光伏发电系统分类...........................................................................................21.2锂电池1.2.1介绍...................................................................................................................21.2.2工作原理...........................................................................................................31.2.3锂离子电池的组成.........................................................................................31.2.4优缺点与应用...................................................................................................31.3锂离子电池在光伏系统中的应用可行性分析1.3.1储能方式的意义及方式...................................................................................41.3.2储能电池的选择...............................................................................................41.3.3储能系统方案...................................................................................................51.3.4产业化关键问题...............................................................................................62锂离子电池在光伏系统中的应用2.1锂电池设计2.1.1锂电池结构图...................................................................................................62.1.2正极材料与负极材料.......................................................................................72.1.3电解液与隔膜...................................................................................................82.1.4基本设计...........................................................................................................82.2光伏系统用锂电池容量设计..................................................................................82.2.1太阳能蓄电音响的锂离子蓄电池容量设计....................................................82.2.2太阳能蓄电音响的锂离子蓄电池组合设计....................................................93结论与展望3.1结论与展望..........................................................................................................10参考文献.........................................................................................................................11用于光伏系统的锂离子蓄电池设计11绪论蓄电池组是将太阳电池方阵发出直流电贮存起来供负载使用。在光伏发电系统中，电池处于浮充放电状态，夏天日照量大，除了供给负载用电外，还对蓄电池充电。在冬天日照量少时，这部分贮存的电能逐步放出。白天太阳能电池方阵给蓄电池充电，同时方阵还要给负载用电，晚上负载用电全部由蓄电池供给。因此，要求蓄电池的自放电要小，而且充电效率要高，同时还要考虑价格和使用是否方便等