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Paper Abstract and Keywords
Presentation 2021-02-12 14:35
Battery degradation diagnosis of mobile devices by using questionnaire data for individual usages
Minoru Asano, Shinji Yokogawa, You Ishigaki (UEC), Junichi Tominaga, Hamakazu Awazu (Keitaiichiba) R2020-36 EMD2020-27
Abstract (in Japanese) (See Japanese page) 
(in English) Lithium-ion secondary battery, which increased high performance and capacity, widely used to ensure mobility for various systems and devices and effective use of renewable energies. As the life of the batteries is extended, secondary use will be an issue in order to achieve effective use of resources and zero emissions. In general, the degradation of lithium-ion batteries is not uniform depending on the complex usage trends of users. Therefore, it is important for the secondary use to understand the degradation state of the internal storage batteries and the usage methods that reduce degradation.
In this study, we propose the estimation method of the degradation for lithium-ion batteries based only on usage data through questionnaire survey analysis of smartphone usage. The methods for classifying usage trends and recommending usage trends that suppress the degradation are investigated using statistical analysis and causal inference methods.
Keyword (in Japanese) (See Japanese page) 
(in English) Smartphones / survey data analysis / cluster analysis / logistics regression / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 360, R2020-36, pp. 13-18, Feb. 2021.
Paper # R2020-36 
Date of Issue 2021-02-05 (R, EMD) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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 R2020-36 EMD2020-27

Conference Information
Committee EMD R  
Conference Date 2021-02-12 - 2021-02-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To R 
Conference Code 2021-02-EMD-R 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Battery degradation diagnosis of mobile devices by using questionnaire data for individual usages 
Sub Title (in English)  
Keyword(1) Smartphones  
Keyword(2) survey data analysis  
Keyword(3) cluster analysis  
Keyword(4) logistics regression  
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1st Author's Name Minoru Asano  
1st Author's Affiliation The University of Electrocommunications (UEC)
2nd Author's Name Shinji Yokogawa  
2nd Author's Affiliation The University of Electrocommunications (UEC)
3rd Author's Name You Ishigaki  
3rd Author's Affiliation The University of Electrocommunications (UEC)
4th Author's Name Junichi Tominaga  
4th Author's Affiliation Keitaiichiba (Keitaiichiba)
5th Author's Name Hamakazu Awazu  
5th Author's Affiliation Keitaiichiba (Keitaiichiba)
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Speaker Author-1 
Date Time 2021-02-12 14:35:00 
Presentation Time 25 minutes 
Registration for R 
Paper # R2020-36, EMD2020-27 
Volume (vol) vol.120 
Number (no) no.360(R), no.361(EMD) 
Page pp.13-18 
#Pages 6 
Date of Issue 2021-02-05 (R, EMD) 

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