| Presentation | 2018-08-07 [Invited Talk] A Battery Management System for Wireless Sensor Devices Ken-ichi Kawasaki, Jun-ichi Nagata, Hiroyuki Nakamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It would be important to observe battery state of charge at each IoT device accurately even with small circuit area and low-power consumption in order to maintain system or service operation stably and continuously while handling huge amount of IoT devices. Measuring consumed coulomb count of device and/or internal impedance of battery accurately is required to observe battery state of charge. In this paper, we introduce an intermittently enabled coulomb counter that can reduce power consumption by 93% compared to conventional coulomb counter even with maintaining measurement accuracy, and measuring internal impedance of battery using pulse shaped input current that can eliminate AC current source and sample-hold circuit, which are conventionally required. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Battery State of Charge / Coulomb Counter / Internal Impedance / Low-Power Consumption |
| Paper # | SDM2018-34,ICD2018-21 |
| Date of Issue | 2018-07-31 (SDM, ICD) |
| Conference Information | |
| Committee | SDM / ICD / ITE-IST |
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| Conference Date | 2018/8/7(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ., Graduate School of IST M Bldg., M151 |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Analog, Mixed Analog and Digital, RF, and Sensor Interface, Low Voltage/Low Power Techniques, Novel Devices/Circuits, and the Applications |
| Chair | Takahiro Shinada(Tohoku Univ.) / Hideto Hidaka(Renesas) / Takayuki Hamamoto(Tokyo University of Science) |
| Vice Chair | Hiroshige Hirano(TowerJazz Panasonic) / Makoto Nagata(Kobe Univ.) / Hiroshi Ohtake(NHK) / Junichi Akita(Kanazawa Univ.) |
| Secretary | Hiroshige Hirano(Shizuoka Univ.) / Makoto Nagata(TOSHIBA MEMORY) / Hiroshi Ohtake(Panasonic) / Junichi Akita(Tohoku Univ.) |
| Assistant | Takahiro Mori(AIST) / Nobuaki Kobayashi(Nihon Univ.) / Hiroyuki Ito(Tokyo Inst. of Tech.) / Masatoshi Tsuge(Socionext) / Tetsuya Hirose(Kobe Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Silicon Device and Materials / Technical Committee on Integrated Circuits and Devices / Technical Group on Information Sensing Technologies |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] A Battery Management System for Wireless Sensor Devices |
| Sub Title (in English) | |
| Keyword(1) | Battery State of Charge |
| Keyword(2) | Coulomb Counter |
| Keyword(3) | Internal Impedance |
| Keyword(4) | Low-Power Consumption |
| 1st Author's Name | Ken-ichi Kawasaki |
| 1st Author's Affiliation | Fujitsu Laboratories LTD.(Fujitsu Labs.) |
| 2nd Author's Name | Jun-ichi Nagata |
| 2nd Author's Affiliation | Fujitsu Laboratories LTD.(Fujitsu Labs.) |
| 3rd Author's Name | Hiroyuki Nakamoto |
| 3rd Author's Affiliation | Fujitsu Laboratories LTD.(Fujitsu Labs.) |
| Date | 2018-08-07 |
| Paper # | SDM2018-34,ICD2018-21 |
| Volume (vol) | vol.118 |
| Number (no) | SDM-172,ICD-173 |
| Page | pp.pp.47-52(SDM), pp.47-52(ICD), |
| #Pages | 6 |
| Date of Issue | 2018-07-31 (SDM, ICD) |