Apparatus and methods for battery monitoring using discharge pulse measurements
First Claim
1. A method comprising:
- determining an open-circuit first voltage of a battery;
increasing a loading of the battery for a load interval after determining the first voltage;
determining a current through the battery during the load interval;
determining an open-circuit second voltage of the battery after termination of the load interval; and
determining a status of the battery from the determined first and second voltages and the determined current.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods include determining first and second voltages of a battery before and after a load interval, determining a current through the battery during the load interval, and determining a status of the battery from the determined first and second voltages and the determined current. The load interval may include an interval during which a discharge pulse is applied to the battery, and the first and second voltages may be voltages when the battery is open circuited. The first voltage may be determined before the battery transitions from an open-circuited state to a pulse discharge state, and the second voltage may be determined after the battery transitions from the pulse discharge state to the open-circuited state. Corresponding battery monitoring apparatus and computer program products are also described.
25 Citations
14 Claims
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1. A method comprising:
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determining an open-circuit first voltage of a battery; increasing a loading of the battery for a load interval after determining the first voltage; determining a current through the battery during the load interval; determining an open-circuit second voltage of the battery after termination of the load interval; and determining a status of the battery from the determined first and second voltages and the determined current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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an input port configured to be coupled to a battery; a load circuit coupled to the input port, configured to selectively couple a load to the input port; and a control circuit coupled to the input port and the load circuit and configured to couple the load to the input for a load interval, to determine open-circuit first and second voltages at the input port before and after the load interval, to determine a current through the battery during the load interval, and to determine a status of the battery from the determined first and second voltages and the determined current. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification