| Presentation | 2021-10-06 Experimental Verification of Cell Voltage Equalizer with AC Heating Capability for Lithium-ion Batteries in Electric Vehicles Reona Sugaya, Masatoshi Uno, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A cell voltage equalizer is indispensable for lithium-ion batteries (LIB) in electric vehicles to mitigate a cell voltage equalizer. In addition, LIBs at low temperatures need a heater to prevent a decrease in a discharge capacity. Compared to external heating techniques, internal ac heating techniques achieve higher heating efficiency and uniform heating. In internal ac heating techniques, however, a heating inverter is necessary to generate an ac heating current, increasing system complexity. This paper proposes a cell voltage equalizer integrating an ac heating inverter. Thanks to a reconfigurable technique at different switching frequencies, the proposed converter can operate either in a voltage equalization mode or an ac heating mode. The experimental verification using a prototype for 12 cells demonstrated that in addition to eliminating cell voltage imbalance, the proposed converter could heat up the LIB from −10℃ to 0℃ within 40 min. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lithium-ion battery / cell voltage equalizer / ac heating / low temperature / DAB converter / electric vehicle |
| Paper # | EE2021-16 |
| Date of Issue | 2021-09-28 (EE) |
| Conference Information | |
| Committee | EE / WPT |
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| Conference Date | 2021/10/5(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tadashi Suetsugu(Fukuoka Univ.) / Toshio Ishizaki(Ryukoku Univ.) |
| Vice Chair | Hiroo Sekiya(Chiba Univ.) / Keiichi Hirose(NTT Facilities) |
| Secretary | Hiroo Sekiya(Sojo Univ.) / Keiichi Hirose(Nagasaki Inst. of Applied Science) / (Okayama Univ.) |
| Assistant | Yuu Yonezawa(Nagoya Univ.) / Yudai Furukawa(Fukuoka Univ.) / Kazufumi Yuasa(NTT Facilities) / Yoshiaki Narusue(Univ. of Tokyo) / Yuki Tanaka(Panasonic) |
| Paper Information | |
| Registration To | Technical Committee on Energy Engineering in Electronics and Communications / Technical Committee on Wireless Power Transfer |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Verification of Cell Voltage Equalizer with AC Heating Capability for Lithium-ion Batteries in Electric Vehicles |
| Sub Title (in English) | |
| Keyword(1) | Lithium-ion battery |
| Keyword(2) | cell voltage equalizer |
| Keyword(3) | ac heating |
| Keyword(4) | low temperature |
| Keyword(5) | DAB converter |
| Keyword(6) | electric vehicle |
| 1st Author's Name | Reona Sugaya |
| 1st Author's Affiliation | Ibaraki University(Ibaraki Univ.) |
| 2nd Author's Name | Masatoshi Uno |
| 2nd Author's Affiliation | Ibaraki University(Ibaraki Univ.) |
| Date | 2021-10-06 |
| Paper # | EE2021-16 |
| Volume (vol) | vol.121 |
| Number (no) | EE-183 |
| Page | pp.pp.23-28(EE), |
| #Pages | 6 |
| Date of Issue | 2021-09-28 (EE) |