POWER PACK REMAINING CAPACITY LEVEL DETECTION
First Claim
1. A method for determining a remaining capacity state of a power pack, the method comprising:
- performing any of the following with a processor;
determining a first ratio of a change in voltage of a power pack to a change in remaining capacity of the power pack over a first time duration, the first time duration comprising a first time point;
determining a second ratio of a change in voltage of the power pack to a change in remaining capacity of the power pack over a second time duration, the second time duration comprising a second time point, the second time point being subsequent to the first time point;
determining that the second ratio is greater than the first ratio; and
indicating, in response to determining that the second ratio is greater than the first ratio, that a power pack remaining capacity level is near depletion.
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0 Petitions
Accused Products
Abstract
Systems and methods to detect particular levels of remaining battery capacities. A ratio of changes in battery output voltage over changes in battery capacity (ΔV/ΔC) is calculated. Detected rises in the value of this ratio are used to detect that a battery has a remaining capacity level that is near depletion. In a certain temperature range, the ΔV/ΔC ratio is used to provide an indication that the battery is approaching a low remaining capacity state. In another temperature range, an increase in the ΔV/ΔC ratio indicates that the battery has reached a mid-range remaining capacity level.
20 Citations
20 Claims
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1. A method for determining a remaining capacity state of a power pack, the method comprising:
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performing any of the following with a processor; determining a first ratio of a change in voltage of a power pack to a change in remaining capacity of the power pack over a first time duration, the first time duration comprising a first time point; determining a second ratio of a change in voltage of the power pack to a change in remaining capacity of the power pack over a second time duration, the second time duration comprising a second time point, the second time point being subsequent to the first time point; determining that the second ratio is greater than the first ratio; and indicating, in response to determining that the second ratio is greater than the first ratio, that a power pack remaining capacity level is near depletion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for determining a remaining capacity state of a power pack, the apparatus comprising:
a capacity monitor adapted to; determine a first ratio of a change in voltage of a power pack to a change in remaining capacity of the power pack over a first time duration, the first time duration comprising a first time point; determine a second ratio of a change in voltage of the power pack to a change in remaining capacity of the power pack over a second time duration, the second time duration comprising a second time point, the second time point being subsequent to the first time point; determine that the second ratio is greater than the first ratio; and indicate, in response to determining that the second ratio is greater than the first ratio, that a power pack remaining capacity level is near depletion. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program product for determining a remaining capacity state of a power pack, the computer program product comprising:
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a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising instructions for; determining a first ratio of a change in voltage of a power pack to a change in remaining capacity of the power pack over a first time duration, the first time duration comprising a first time point; determining a second ratio of a change in voltage of the power pack to a change in remaining capacity of the power pack over a second time duration, the second time duration comprising a second time point, the second time point being subsequent to the first time point; determining that the second ratio is greater than the first ratio; and indicating, in response to determining that the second ratio is greater than the first ratio, that a power pack remaining capacity level is near depletion. - View Dependent Claims (18, 19, 20)
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Specification