| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2023-06-28 |
| タイトル |
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タイトル |
High-precision robust monitoring of charge/discharge current over a wide dynamic range for electric vehicle batteries using diamond quantum sensors |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Yuji Hatano
Jaewon Shin
Junya Tanigawa
Yuta Shigenobu
Akimichi Nakazono
TakeharuSekiguchi
Onoda Shinobu
Ohshima Takeshi
Keigo Arai
Takayuki Iwasaki
Mutsuko Hatano
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Accurate prediction of the remaining driving range of electric vehicles is difficult because the state-of-the-art sensors for measuring battery current are not accurate enough to estimate the state of charge. This is because the battery current of EVs can reach a maximum of several hundred amperes while the average current is only approximately 10 A, and ordinary sensors do not have an accuracy of several tens of milliamperes while maintaining a dynamic range of several hundred amperes. Therefore, the state of charge has to be estimated with an ambiguity of approximately 10%, which makes the battery usage inefficient. This study resolves this limitation by developing a diamond quantum sensor with an inherently wide dynamic range and high sensitivity for measuring the battery current. The design uses the differential detection of two sensors to eliminate in-vehicle common-mode environmental noise, and a mixed analog?digital control to trace the magnetic resonance microwave frequencies of the quantum sensor without deviation over a wide dynamic range. The prototype battery monitor was fabricated and tested. The battery module current was measured up to 130 A covering WLTC driving pattern, and the accuracy of the current sensor to estimate battery state of charge was analyzed to be 10 mA, which will lead to 0.2% CO2 reduction emitted in the 2030 WW transportation field. Moreover, an operating temperature range of???40 to +?85 °C and a maximum current dynamic range of?±?1000 A were confirmed. |
| 書誌情報 |
Scientific Reports
巻 12,
p. 13991(1)-13991(10),
発行日 2022-09
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| 出版者 |
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出版者 |
Springer Nature |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2045-2322 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1038/s41598-022-18106-x |
