Method and system for determining a state of charge of a battery
Methods and systems are provided for determining a state of charge of a battery. The battery is subjected to a predetermined magnetic field such that the battery and the predetermined magnetic field jointly create a resultant magnetic field. The resultant magnetic field is sensed. The state of charge of the battery is determined based on the resultant magnetic field.
1. A system comprising:
a battery;
a magnetic field generator configured to subject the battery to a predetermined magnetic field such that the battery and the magnetic field generator jointly create a resultant magnetic field; and
a magnetically responsive component configured to generate an electromagnetic response to the resultant magnetic field.
2. The system of claim 1 , further comprising a processor configured to:
communicate with the magnetically responsive component;
detect the electromagnetic response; and
determine a state of charge of the battery based on the electromagnetic response.
3. The system of claim 1 , wherein the electromagnetic response is a change in a magnetic susceptibility of the magnetically responsive component.
4. The system of claim 1 , wherein the magnetically responsive component is a wire coil.
5. The system of claim 1 , wherein the magnetically responsive component comprises a conductor configured to carry a current from a current source and receive substantially magnetic flux lines from a permanent magnet that are substantially perpendicular the magnetically responsive component.
6. The system of claim 2 , wherein determining the state of charge of the battery comprises integrating a current flowing through the battery with respect to time.
7. The system of claim 5 , wherein integrating the current flowing through the battery with respect to time comprises referring the electromagnetic response to a look up table.
8. A system comprising:
a battery;
a magnetic field generator configured to subject the battery to a constant predetermined magnetic field such that the battery and the magnetic field generator jointly create a resultant magnetic field; and
a magnetically responsive component configured to generate an electromagnetic response to the resultant magnetic field.
9. A system comprising:
a battery;
a magnetic field generator configured to subject the battery to predetermined magnetic field such that the battery and the magnetic field generator jointly create a resultant magnetic field; and
a wire coil configured to generate an electromagnetic response to the resultant magnetic field.