ArticleScientific reports2022
High-precision robust monitoring of charge/discharge current over a wide dynamic range for electric vehicle batteries using diamond quantum sensors.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Current comparator for both AC and DC ratio measurements with 10Scientific reports · 2026Article
- Frequency Locking Method for Frequency Standards Based on Diamond NV Centers.Sensors (Basel, Switzerland) · 2026Article
- Sensitivity Improvement via Differential Detection for Frequency-Locking Diamond Magnetometers.Micromachines · 2025Article
- Magnetic microscopy for operando imaging of battery dynamics.Nature communications · 2025Review
- Recent progress in hybrid diamond photonics for quantum information processing and sensing.Communications engineering · 2025Review
- Review
- High-Dynamic-Range Integrated NV Magnetometers.Micromachines · 2024Article
- A wide dynamic range diamond quantum sensor as an electric vehicle battery monitor.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2024Article
- Noise Suppression of Nitrogen-Vacancy Magnetometer in Lock-In Detection Method by Using Common Mode Rejection.Micromachines · 2023Article
Corrections and comments
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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% CO
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Registered trials
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