| Presentation | 2021-02-12 Battery degradation diagnosis of mobile devices by using questionnaire data for individual usages Minoru Asano, Shinji Yokogawa, You Ishigaki, Junichi Tominaga, Hamakazu Awazu, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Smartphones / survey data analysis / cluster analysis / logistics regression |
| Paper # | R2020-36,EMD2020-27 |
| Date of Issue | 2021-02-05 (R, EMD) |
| Conference Information | |
| Committee | EMD / R |
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| Conference Date | 2021/2/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yoshiki Kayano(Univ. of Electro-Comm.) / Akira Asato(Fujitsu) |
| Vice Chair | / Tadashi Dohi(Hiroshima Univ.) |
| Secretary | (Nippon Inst. of Tech.) / Tadashi Dohi(Hosei Univ.) |
| Assistant | Yuichi Hayashi(ＮＡＩＳＴ) / Kazuaki Miyanaga(Fujitsu Component) / Hiroyuki Okamura(Hiroshima Univ.) / Shinji Yokogawa(Univ. of Electro-Comm.) |
| Paper Information | |
| Registration To | Technical Committee on Electromechanical Devices / Technical Committee on Reliability |
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| Language | JPN |
| 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 |
| 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) |
| Date | 2021-02-12 |
| Paper # | R2020-36,EMD2020-27 |
| Volume (vol) | vol.120 |
| Number (no) | R-360,EMD-361 |
| Page | pp.pp.13-18(R), pp.13-18(EMD), |
| #Pages | 6 |
| Date of Issue | 2021-02-05 (R, EMD) |