Battery state of charge sensor

An LFP battery for an automotive motor vehicle comprising:

• a plurality of interconnected battery cells, wherein at least one of the plurality of battery cells includes a battery status of charge sensor attached to the at least one battery cell;
• a circuit electrically connected to the battery status of charge sensor for receiving a signal indicative of the state of charge of the at least one battery cell;
• and
• a memory device for electrically storing the signal.

A method for monitoring the state of charge of a battery cell comprising the steps of:

• providing a battery state of charge sensor adapted to being attached proximate to a battery cell, the sensor comprising:
• an inductive drive coil for outputting a magnetic field;
• and
• at least one flux coil for sensing a change in the magnetic field by measuring a change in the inductance of the at least one flux coil;
• outputting a magnetic field from the inductive drive coil;
• sensing a change in the magnetic field;
• and
• outputting a signal indicative of a state of charge of the battery cell.

An apparatus for monitoring the state of charge of an object comprising:

• a state of charge sensor adapted to being attached proximate to the object, the sensor comprising:
• an inductive drive coil for outputting a magnetic field;
• and
• at least one flux coil for sensing a change in the magnetic field by measuring a change in the inductance of the at least one flux coil, the change being indicative of a state of charge of the object.