《电池快讯》(月刊)已出版408期.pdf

第 2 期王族帆,等:新旧 LiFePO4电池高温稳定性对比3 结论本文作者以抽检用的循环老化电芯作为抽样总体,随机选取 2 只循环老化电芯作为研究对象。选取的两只电芯在2.503.65 V 充放电,分别以 1.00 C 循环 1 622 次(容量保持率 90.02%)和以 2.00 C 充电、1.00 C 放电循环 782 次(容量保持率 82.50%)。对比 2 只循环老化电芯与新电芯加热测试的结果,并对加热测试后电芯的隔膜表面形貌、负极结构、电极电化学性能进行分析。加热测试中,3 只电芯均未爆炸起火,但循环老化电芯的热稳定性较差;1.00 C 循环的电芯出现泄压现象,而 2.00 C充电、1.00 C 放电的电芯未出现,表明锂离子电池安全测试的结果具有一定的随机性。在高温测试后,无论是新电芯还是循环老化后的电芯,内部反应都是不均匀的。经过老化后的电芯,负极部分区域出现明显的锂沉积,但测试分析结果表明,该部分负极的晶格结构并未受到严重破坏,存在回收再利用的可能。参考文献:1 朱志祥.浅析新能源汽车热管理远程控制J.汽车电器,2020(1):25-26.ZHU Z X.Analysis of remote control of new energy vehicle thermal managementJ.Auto Electric Parts,2020(1):25-26.2 GB 380312020,电动汽车用动力蓄电池安全要求S.GB 380312020,Electric Vehicles Traction Battery Safety Re-quirementsS.3 REN D S,HSU H J,LI R H,et al.A comparative investigation of aging effects on thermal runaway behavior of lithium-ion batteriesJ.eTransportation,2019,2:100034.4 LIU J L,DUAN Q Q,MA M N,et al.Aging mechanisms and ther-mal stability of aged commercial 18650 lithium ion battery induced by slight overcharging cyclingJ.J Power Sources,2020,445:227263.5 FENG L,JIANG L H,LIU J L,et al.Dynamic overcharge investiga-tions of lithium ion batteries with different state of health J.J Power Sources,2021,507:230262.6 MAO C Y,RUTHER R E,LI J L,et al.Identifying the limiting electrode in lithium ion batteries for extreme fast chargingJ.Electrochem Commun,2018,97:37-41.7 MCSHANE E J,PAUL P P,TANIM T R,et al.Multimodal quanti-fication of degradation pathways during extreme fast charging of lithium-ion batteries J.J Mater Chem A,2022,10:23927-23939.8PEI A,ZHENG G Y,SHI F F,et al.Nanoscale nucleation and growth of electrodeposited lithium metalJ.Nano Lett,2017,17(2):1132-1139.9 邵丹,骆相宜,钟灿鸣,等.动力锂离子电池安全性研究的进展J.电池,2020,50(1):83-86.SHAO D,LUO X Y,ZHONG C M,et al.Progress in safety research of automotive Li-ion batteryJ.Battery Bimonthly,2020,50(1):83-86.10 MAHER K,YAZAMI R.A thermodynamic and crystal structure study of thermally aged lithium ion cellsJ.J Power Sources,2014,261:389-400.11 崔潇丹,丛晓民,赵林双.锂离子电池热失控气体及燃爆危险性研究进展J.电池,2021,51(4):407-411.CUI X D,CONG X M,ZHAO L S.Research progress in thermal runaway gases and explosion hazards of Li-ion batteryJ.Battery Bimonthly,2021,51(4):407-411.12 PENG P,JIANG F M.Thermal behavior analyses of stacked pris-matic LiCoO2 lithium-ion batteries during oven testsJ.Int J Heat Mass Transfer,2015,88:411-423.收稿日期:2022-12-27电池快讯(月刊)已出版 408 期电池快讯(月刊)复刊于 1988 年,至今已连续出版 408 期。多年来,电池快讯坚持面向企业,面向市场,注重服务,向电池行业提供了万余条专业、实用的独家信息,对促进行业内的交流与沟通,对推进我国电池行业的进步做出了贡献,深受企业家们的广泛好评。近年来,电池企业家们对电池有关政策更为关心,对材料行情的变化更为敏感,对电池科技的进步更为关注,对电池销售市场的变化更为留心。企业家们对国际市场更是兴趣倍增!电池快讯恰好给电池及相关企业家们雪中送炭。如果你没有阅读过电池快讯,欢迎索取样刊一本;如果你有适合本刊刊登的稿件,欢迎投稿。查询全部 408 期的总目录,请登陆电池网 ,查阅电池快讯分类总目录。地址:湖南长沙市仰天湖新村 1 号(410015)电话:0731-85141901 传真:0731-85427570 E-mail:batterie 371