Magnetic field imaging based on Quantum Sensors
A critical tool in battery cell diagnostics will be a current sensor array that can very accurately measure the current density distribution in the cell. This measurement data will help create a durable new cell design. The novel current sensor is based on nitrogen vacancies (NV) in diamonds, opening up application areas that cannot be covered by conventional commercial sensors. The sensor principle uses an interaction from the magnetic field to be measured with an electron of the NV center in the diamond. This interaction and thus also the magnetic field can be detected purely optically by a fluorescence change. To increase the sensitivity, the method of optically detected magnetic resonance (ODMR) can be used by means of a microwave field.