Method for determining battery capacity
First Claim
1. An electrical device powered by a battery, comprising:
- voltage reading circuitry configured to monitor the voltage of a power source connector that is charging the battery;
transition phase determining circuitry operatively connected to the voltage reading circuitry to determine that the battery has entered a transition phase based on sensing an abrupt change in the voltage; and
battery capacity determining circuitry configured to determine, in response to the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model that defines the battery'"'"'s capacity as a function of the battery'"'"'s voltage;
the transition phase determining circuitry being further configured to determine that the transition phase has ended based on the lapse of a predetermined time period from the start of the transition phase; and
the transition phase battery capacity model being determined from both a non-transition battery capacity charge model and a non-transition battery capacity discharge model, all three models defining the battery'"'"'s capacity as a function of its voltage.
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Accused Products
Abstract
An electrical device is powered by a battery. The device includes transition phase determining circuitry operatively connected to the battery to determine that the battery has entered a transition phase based on the occurrence of a change in direction of current flowing through the battery. Battery capacity determining circuitry is operatively connected to the transition phase determining circuitry and configured to determine, in response the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model of capacity-vs.-voltage. The transition phase determining circuitry is further configured to determine an end of the transition phase based on the transition phase battery capacity model and a non-transition battery capacity model of capacity-vs.-voltage yielding the same capacity value for a given measured voltage of the battery.
10 Citations
20 Claims
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1. An electrical device powered by a battery, comprising:
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voltage reading circuitry configured to monitor the voltage of a power source connector that is charging the battery; transition phase determining circuitry operatively connected to the voltage reading circuitry to determine that the battery has entered a transition phase based on sensing an abrupt change in the voltage; and battery capacity determining circuitry configured to determine, in response to the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model that defines the battery'"'"'s capacity as a function of the battery'"'"'s voltage; the transition phase determining circuitry being further configured to determine that the transition phase has ended based on the lapse of a predetermined time period from the start of the transition phase; and the transition phase battery capacity model being determined from both a non-transition battery capacity charge model and a non-transition battery capacity discharge model, all three models defining the battery'"'"'s capacity as a function of its voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrical device powered by a battery, comprising:
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voltage reading circuitry configured to monitor the voltage of a power source connector that is charging the battery; transition phase determining circuitry operatively connected to the voltage reading circuitry to determine that the battery has entered a transition phase based on sensing an abrupt change in the voltage; and battery capacity determining circuitry configured to determine, in response to the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model that defines the battery'"'"'s capacity as a function of the battery'"'"'s voltage; the transition phase determining circuitry being further configured to determine that the transition phase has ended based on the battery voltage having changed by a predetermined voltage value from the battery voltage at the start of the transition phase; and the transition phase battery capacity model being determined from both a non-transition battery capacity charge model and a non-transition battery capacity discharge model, all three models defining capacity as a function of voltage for the battery. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electrical device powered by a battery, comprising:
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voltage reading circuitry configured to monitor the voltage of a power source connector that is charging the battery; transition phase determining circuitry operatively connected to the voltage reading circuitry to determine that the battery has entered a transition phase based on sensing an abrupt change in the voltage; and battery capacity determining circuitry configured to determine, in response to the transition phase determining circuitry determining that the battery is in the transition phase, a capacity of the battery based on a transition phase battery capacity model that defines the battery'"'"'s capacity as a function of the battery'"'"'s voltage; the transition phase determining circuitry being further configured to determine an end of the transition phase based on the transition phase battery capacity model and a non-transition battery capacity model of capacity-vs.-voltage yielding the same capacity value for a given measured voltage of the battery. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification