ChemRN: Fuel Cells (Topic)最新文献

筛选
英文 中文
Active Cell Balancing of Li-Ion Batteries for Electric Vehicles 电动汽车用锂离子电池的主动电池平衡
ChemRN: Fuel Cells (Topic) Pub Date : 2019-11-30 DOI: 10.2139/ssrn.3495810
Debadyuti Banerjee, A. Giri, S. Saha
{"title":"Active Cell Balancing of Li-Ion Batteries for Electric Vehicles","authors":"Debadyuti Banerjee, A. Giri, S. Saha","doi":"10.2139/ssrn.3495810","DOIUrl":"https://doi.org/10.2139/ssrn.3495810","url":null,"abstract":"Electric vehicles (EV) use battery banks containing series-parallel combinations of several small units to meet the high power demand of the drive system. In recent years, lithium-ion (Li-ion) batteries are being popularly used in EVs for energy storage instead of conventional lead acid batteries due to the advantages of higher cell voltage, no memory effect, low self-discharge, longer battery life and reduced size and weight. However, Li-ion battery packs require external power balancing circuits for its protection from getting damaged by overcharge and deep discharge. This work proposes an active circuit for charge balancing of Li-ion battery packs. The proposed charge balancing circuit uses a multi-winding flyback converter with n+1 number of active switches to protect a stack of n number of series connected cells. Performance of the proposed system has been verified through computer simulation in MATLAB with a 4 cell battery pack. Simulated results were found in close agreement with the predicted behaviour of the system.","PeriodicalId":391497,"journal":{"name":"ChemRN: Fuel Cells (Topic)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130097917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Microstructure, Formation, and Diffusion Kinetics of Multilayered Oxides Formed on a Co-W Electroplated Ferritic Stainless Steel Followed by Oxidation Treatment 氧化处理后Co-W电镀铁素体不锈钢上多层氧化物的微观结构、形成和扩散动力学
ChemRN: Fuel Cells (Topic) Pub Date : 2019-11-21 DOI: 10.2139/ssrn.3491242
L. Gan, Tomoyuki Yamamoto, H. Murakami
{"title":"Microstructure, Formation, and Diffusion Kinetics of Multilayered Oxides Formed on a Co-W Electroplated Ferritic Stainless Steel Followed by Oxidation Treatment","authors":"L. Gan, Tomoyuki Yamamoto, H. Murakami","doi":"10.2139/ssrn.3491242","DOIUrl":"https://doi.org/10.2139/ssrn.3491242","url":null,"abstract":"Numerous attempts have been made to improve the oxidation resistance and electrical conductivity of the interconnectors in solid oxide fuel cells. A Co-W alloy coating on ferritic stainless steel has attracted attention because the Co-W oxide layer formed by the oxidation treatment of the Co-W alloy coating has proven effective in reducing the outward diffusion of Cr and improving oxidation resistance. This study was designed to elucidate the formation kinetics and diffusion barrier mechanism of the Co-W coating. After oxidation in air at 750 °C, a dense, multilayered oxide formed, comprising (from the stainless steel substrate to the outer layer) Cr oxide, Cr-Fe-Co oxide, Co-W oxide, Co-Fe oxide, and Co oxide layers. The CoWO<sub>4</sub> layer and neighboring oxide layers were carefully analyzed by scanning electron microscopy and transmission electron microscopy, which revealed that the innermost Cr<sub>2</sub>O<sub>3</sub> layer grows via the reaction between Cr in the substrate and inward-diffusing oxygen, whereas outward diffusion of Fe and Co is involved in the formation and growth of (Co,Fe)<sub>3</sub>O<sub>4</sub> and Co<sub>3</sub>O<sub>4</sub>. Analysis by electron energy-loss spectroscopy confirmed the absence of trivalent cations (Co<sup>3+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup>) and the presence of Fe<sup>2+</sup> ions in the CoWO<sub>4</sub> layer; thus, CoWO<sub>4</sub> functions as a selective diffusion barrier to trivalent cations as hypothesized.","PeriodicalId":391497,"journal":{"name":"ChemRN: Fuel Cells (Topic)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121679559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信