NCM动力电池热失控膨胀屏障技术研究

中国安全科学学报 Pub Date : 2020-03-28 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.03.005

Z. Shaoyu, Xian Xue-lei, Dong Hai-bin, Li Yi, Y. Dongxing

{"title":"NCM动力电池热失控膨胀屏障技术研究","authors":"Z. Shaoyu, Xian Xue-lei, Dong Hai-bin, Li Yi, Y. Dongxing","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.005","DOIUrl":null,"url":null,"abstract":"In order to effectively control thermal runaway expansion of high energy density lithium ion batteries (LIBs)ꎬ a composite barrier technology was proposed. With soft NCM811 battery as research objectꎬ existing fire prevention and control method of LIBs was analyzed and relationship between surface temperature and thermal runaway trigger time was determined by studying its thermal runaway characteristics. Thenꎬ thermal insulation tests for materials of different microstructures and sizesꎬ represented by aerogelsꎬ asbestos and rock woolꎬ were conducted to determine relationship between microstructure size and thermal barrier characteristics. Finallyꎬ thermal resistance characteristics of different barrier schemes were studied through thermal isolation tests with different thickness and number of layers. The results show that the smaller microstructure of barrier material is ( less than 70 nm of average free path of air molecules)ꎬ the thinner it isꎬ and the more layers and better thermal barrier effect it has.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"31 1","pages":"28"},"PeriodicalIF":0.0000,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Research on thermal runaway expansion barrier technology of NCM power battery\",\"authors\":\"Z. Shaoyu, Xian Xue-lei, Dong Hai-bin, Li Yi, Y. Dongxing\",\"doi\":\"10.16265/J.CNKI.ISSN1003-3033.2020.03.005\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to effectively control thermal runaway expansion of high energy density lithium ion batteries (LIBs)ꎬ a composite barrier technology was proposed. With soft NCM811 battery as research objectꎬ existing fire prevention and control method of LIBs was analyzed and relationship between surface temperature and thermal runaway trigger time was determined by studying its thermal runaway characteristics. Thenꎬ thermal insulation tests for materials of different microstructures and sizesꎬ represented by aerogelsꎬ asbestos and rock woolꎬ were conducted to determine relationship between microstructure size and thermal barrier characteristics. Finallyꎬ thermal resistance characteristics of different barrier schemes were studied through thermal isolation tests with different thickness and number of layers. The results show that the smaller microstructure of barrier material is ( less than 70 nm of average free path of air molecules)ꎬ the thinner it isꎬ and the more layers and better thermal barrier effect it has.\",\"PeriodicalId\":9976,\"journal\":{\"name\":\"中国安全科学学报\",\"volume\":\"31 1\",\"pages\":\"28\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-03-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"中国安全科学学报\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.005\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国安全科学学报","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.005","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 1

摘要

为了有效控制高能量密度锂离子电池(LIBs)ꎬ的热失控膨胀，提出了一种复合势垒技术。以软质NCM811电池为研究对象ꎬ分析了现有的锂电池防火控制方法，通过研究其热失控特性，确定了表面温度与热失控触发时间的关系。然后对以气凝胶ꎬ、石棉、岩棉ꎬ为代表的不同微观结构尺寸ꎬ材料进行ꎬ保温试验，确定微观结构尺寸与热障特性的关系。ꎬ通过不同层厚和层数的隔热试验，研究了不同阻挡层方案的热阻特性。结果表明:阻挡材料的微观结构越小(空气分子平均自由程小于70 nm)ꎬ越薄ꎬ，层数越多，热障效果越好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Research on thermal runaway expansion barrier technology of NCM power battery

In order to effectively control thermal runaway expansion of high energy density lithium ion batteries (LIBs)ꎬ a composite barrier technology was proposed. With soft NCM811 battery as research objectꎬ existing fire prevention and control method of LIBs was analyzed and relationship between surface temperature and thermal runaway trigger time was determined by studying its thermal runaway characteristics. Thenꎬ thermal insulation tests for materials of different microstructures and sizesꎬ represented by aerogelsꎬ asbestos and rock woolꎬ were conducted to determine relationship between microstructure size and thermal barrier characteristics. Finallyꎬ thermal resistance characteristics of different barrier schemes were studied through thermal isolation tests with different thickness and number of layers. The results show that the smaller microstructure of barrier material is ( less than 70 nm of average free path of air molecules)ꎬ the thinner it isꎬ and the more layers and better thermal barrier effect it has.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

中国安全科学学报

CiteScore

1.30

自引率

0.00%

发文量

8733

期刊介绍： China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad. China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454. Honors: Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level National Chinese core journals China Science and technology core journals CSCD journals The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included