Battery monitoring
First Claim
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1. A method of monitoring state of charge of an electric storage battery comprising the steps of:
- deliberately inducing eddy currents in conductive metallic constituents of negative plate material of the battery concerned;
detecting effects representative of said eddy currents; and
determining the state of charge of the battery based on the detected eddy current effects.
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Accused Products
Abstract
Monitoring state of charge of an electric storage battery (18) is done by deliberately inducing eddy currents, specifically using an induction coil (70) in conductive metallic constituents of negative plate material (74) of the battery concerned, and detecting effects representative of said eddy currents, specifically by detecting (76, 78) amplitude or frequency effects on energizing signals (72).
28 Citations
16 Claims
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1. A method of monitoring state of charge of an electric storage battery comprising the steps of:
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deliberately inducing eddy currents in conductive metallic constituents of negative plate material of the battery concerned; detecting effects representative of said eddy currents; and determining the state of charge of the battery based on the detected eddy current effects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. Apparatus for monitoring state of charge of an electric storage battery comprising induction coil means for deliberately inducing eddy currents in conductive metallic constituents of negative plate material of the battery concerned, means for supplying to said coil and eddy current inducing electrical energizing signal at a frequency of at least one kilohertz, means for detecting amplitude and/or frequency effects representative of said eddy currents, and means for determining the state of charge of the battery based on the detected effects representative of said eddy currents.
Specification