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US 2006/0049805 A1Published application
System and method of battery capacity reporting
AssigneeResearch In Motion Limited
InventorPhat Tran
Life of this patent
Estimating the term…
Abstract
A method and system for accurately reporting battery capacity is disclosed herein. The disclosed method and system prevent the reporting of discontinuous capacity values resulting from starting or stopping recharge cycles. The disclosed method and system prevent over or under reporting of battery capacity due to the transition between charge and discharge curves in a battery model.
Claims13
A method of determining an available capacity of a rechargeable battery, comprising:
- storing a battery capacity model, the battery capacity model including a first set of data and a second set of data,
- the first set of data relating battery voltage to available capacity when the battery is charging,
- the second set of data relating battery voltage to available capacity when the battery is discharging;
- measuring a battery voltage;
- determining if the battery is charging or discharging;
- if the battery is charging, then using the first set of data from the battery capacity model to determine the available capacity from the measured battery voltage;
- and
- if the battery is discharging, then using the second set of data from the battery capacity model to determine the available capacity from the measured battery voltage.
5 more elements
A mobile communication device, comprising:
- a rechargeable battery;
- a memory device storing a battery capacity model, the battery capacity model including a first set of data and a second set of data,
- the first set of data relating battery voltage to available capacity when the rechargeable battery is charging,
- the second set of data relating battery voltage to available capacity when the rechargeable battery is discharging;
- a charging subsystem configured to measure a battery voltage of the rechargeable battery, and determine if the rechargeable battery is charging or discharging;
- the charging subsystem being further configured to use the first set of data from the battery capacity model to determine the available capacity from the measured battery voltage if the rechargeable battery is charging, and use the second set of data from the battery capacity model to determine the available capacity from the measured battery voltage if the rechargeable battery is discharging.
3 more elements
A mobile communication device, comprising:
- means for storing a battery capacity model, the battery capacity model including a first set of data and a second set of data,
- the first set of data relating battery voltage to available capacity when the battery is charging,
- the second set of data relating battery voltage to available capacity when the battery is discharging;
- means for measuring a battery voltage;
- means for determining if the battery is charging or discharging;
- means for using the first set of data from the battery capacity model to determine the available capacity from the measured battery voltage if the battery is charging;
- and
- means for using the second set of data from the battery capacity model to determine the available capacity from the measured battery voltage if the battery is discharging.
5 more elements
Dependencies are inferred from the claim text.