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Paper Abstract and Keywords
Presentation 2021-07-20 09:30
Independent Controlled Hot-Plug Switches for Parallel Operation of Reuse Battery Strings
Kazuo Takehara, Fumiaki Nakao (NExTeS), Kimihiro Nishijima, Eiji Sakai (SOJO UNIV.) EE2021-10
Abstract (in Japanese) (See Japanese page) 
(in English) The series strings of reused battery cells connected in parallel have different available voltage ranges due to the imbalance between the SoC (State of Charge) and SoH (State of Health) of these cells. Therefore, the utilization capacity of this battery system is limited due to overcharge and over discharge protection of any one of all cells. This paper proposes hot-plug switches to solve this problem. The series battery strings are connected in parallel via these switches and are controlled by the state of the battery cells monitored using the BMS (Battery Management System). Experiments have shown that the utilization efficiency of the reused battery system is improved. The proposed switches allow batteries to be hot-swapped without inrush current into the DC bus, and a reliable and redundant power storage system can be constructed.
Keyword (in Japanese) (See Japanese page) 
(in English) reuse battery / hot-plug switches / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 124, EE2021-10, pp. 16-20, July 2021.
Paper # EE2021-10 
Date of Issue 2021-07-12 (EE) 
ISSN Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EE2021-10

Conference Information
Committee EE IEE-SPC  
Conference Date 2021-07-19 - 2021-07-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2021-07-EE-SPC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Independent Controlled Hot-Plug Switches for Parallel Operation of Reuse Battery Strings 
Sub Title (in English)  
Keyword(1) reuse battery  
Keyword(2) hot-plug switches  
1st Author's Name Kazuo Takehara  
1st Author's Affiliation NExT-e Solutions Inc. (NExTeS)
2nd Author's Name Fumiaki Nakao  
2nd Author's Affiliation NExT-e Solutions Inc. (NExTeS)
3rd Author's Name Kimihiro Nishijima  
3rd Author's Affiliation SOJO UNIVERSITY (SOJO UNIV.)
4th Author's Name Eiji Sakai  
4th Author's Affiliation SOJO UNIVERSITY (SOJO UNIV.)
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Speaker Author-1 
Date Time 2021-07-20 09:30:00 
Presentation Time 25 minutes 
Registration for EE 
Paper # EE2021-10 
Volume (vol) vol.121 
Number (no) no.124 
Page pp.16-20 
Date of Issue 2021-07-12 (EE) 

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