Method and system for calibrating current sensor of electric vehicle battery electronics

摘要

An electric vehicle battery arrangement includes a current sensor. The current sensor has a core and a magnetic field detector. An N-turn coil is wrapped around the core. A controller is configured to adjust an output of the detector indicative of current according to a comparison between a magnetic field caused by a given current in the coil as detected by the detector and a magnetic field expected to be caused by the given current in the coil.

主权项

1. A system comprising:
a core around a conductor; a N-turns coil wrapped around the core; a controller to feed the coil with a calibration current, unknown within a known tolerance, of 1/N*a maximum conductor current and to adjust a magnetic field detector output indicative of conductor current according to a comparison between the detector detected and expected magnetic fields caused by the calibration current whereby the output is as accurate as the tolerance.