Improving Accuracy of Battery Charge Measurement

The issue of battery usage inefficiency in electric vehicles (EVs) resulting from an inaccurate battery charge measurement may finally get resolved, thanks to a diamond quantum sensor prototype developed in the MEXT Q-LEAP Flagship project with researchers from Tokyo Tech and Yazaki Corporation. The sensor can measure currents in a wide range as well as detect milliampere-level currents in a noisy environment, improving the detection accuracy from 10 percent to within 1 percent.