Industry shortage: Modern new energy vehicles largely use lithium batteries as energy storage equipment, battery management system (BMS).Isone of the key technologies. Correct assessment of bat ter,-residual power helps to improve the service life and reliability of the bat ten,-, and the accuracy of bat ten,-residual power assessment depends on the accuracy of the current sensor, so the further improvement of the accuracy of the current sensor can meet the needs of the next stage of BMS system. Empowered value: A current sensor based on quantum precision measurement can accurately measure the working current of the batten,- and improve it.BMS manages the remaining power of the batten,-, improves the effective range and improves the indicators of the car.