Overcharging safety characteristics of retired VRLA

中国安全科学学报 Pub Date : 2021-01-27 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.04.003

Wu Jingyun, Shih-Wei Cheng, Guo Pengyu, Yao Lijuan, Sun Yiting, Jin Yang

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Abstract

In order to solve problems of battery temperature riseꎬ gas generation and failure caused by overcharged VRLAꎬ an experiment was conducted on a module composed of 8 VRLA cells in parallel with rated parameter of each cell at 12 V / 160 Ahꎬ and it was overcharged at constant current of 0􀆰 17 C (27 A). The results show that H2ꎬ SO2ꎬ and CO are generated in sequence 169ꎬ 189ꎬ and 209 s after overcharge while hydrocarbon gas is generated at 33 minutes. 17􀆰 6 V is the maximum charging voltage for retired VRLA batteriesꎬ and once it is reachedꎬ internal electrolytic water as well as other reactions will be intensified. According to thermal simulation temperature curveꎬ internal and external temperature difference of the module can be 40 °C while temperature difference of each cell can also be significant after overcharge for a long time with a maximum gap of 30 °C . In additionꎬ retired VRLA does not cause obvious deformation and combustion after overcharging. But abnormal status of batteriesꎬ like overchargingꎬ can be warned by monitoring concentration variation of H2 .

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退役VRLA过充安全特性研究

为了解决问题,电池温升ꎬ气体的产生和失败造成的多收了VRLAꎬ进行了一个实验模块组成对电池8细胞与额定参数的每一个细胞12 V / 160啊ꎬ在恒流充电的0􀆰17 C(27日)。结果表明,H2ꎬ二氧化硫ꎬ和169年序列生成ꎬꎬ189和209年代后超载而生成碳氢化合物气体在33分钟。17􀆰6 V是退役VRLA电池的最大充电电压ꎬ，一旦达到ꎬ，内部电解水以及其他反应将会加剧。根据热模拟温度曲线ꎬ，模块内外温差可达40℃，长时间过充后各电池温差也较大，最大温差可达30℃。此外ꎬ退役VRLA过充后不会产生明显的变形和燃烧。通过监测氢气浓度变化，可以预警电池的异常状态ꎬ如过充ꎬ。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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