Battery remaining capacity measuring apparatus
First Claim
1. A battery remaining capacity measuring apparatus, comprising:
- a plurality of voltage detectors disposed corresponding to a plurality of batteries connected in series, for detecting terminal voltages of the plurality of batteries respectively;
a current detector for detecting a current flowing from the plurality of batteries to a load;
a voltage and current collector for reading, for each battery, both a voltage value detected by the corresponding voltage detector and a current value detected by the current detector at every predetermined period of time, and collecting a predetermined number of detected voltage values and corresponding detected current values; and
a remaining capacity calculator for calculating a battery remaining capacity for each battery based on the predetermined number of detected voltage values and the corresponding detected current values collected by the voltage and current collector, selecting a battery remaining capacity having a minimum value from out of a plurality of calculated battery remaining capacities, and calculating a battery remaining capacity of the whole of the plurality of batteries based on the selected battery remaining capacity.
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Accused Products
Abstract
Each voltage sensor is provided one to one for a plurality of batteries, for detecting a terminal voltage of each battery. A current sensor detects a current flowing from the plurality of batteries to a load. A reading section reads for each battery a voltage value detected by a corresponding voltage sensor and a current value detected by the current sensor at every predetermined period of time, and collects a predetermined number of detected voltage values and corresponding detected current values. A remaining capacity calculator calculates a battery remaining capacity for each battery based on the plurality of detected voltage values and the plurality of corresponding detected current values, selects a battery remaining capacity having a minimum value from out of a plurality of calculated battery remaining capacities, and calculates a remaining capacity of the whole of the plurality of batteries based on the selected battery remaining capacity.
24 Citations
9 Claims
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1. A battery remaining capacity measuring apparatus, comprising:
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a plurality of voltage detectors disposed corresponding to a plurality of batteries connected in series, for detecting terminal voltages of the plurality of batteries respectively; a current detector for detecting a current flowing from the plurality of batteries to a load; a voltage and current collector for reading, for each battery, both a voltage value detected by the corresponding voltage detector and a current value detected by the current detector at every predetermined period of time, and collecting a predetermined number of detected voltage values and corresponding detected current values; and a remaining capacity calculator for calculating a battery remaining capacity for each battery based on the predetermined number of detected voltage values and the corresponding detected current values collected by the voltage and current collector, selecting a battery remaining capacity having a minimum value from out of a plurality of calculated battery remaining capacities, and calculating a battery remaining capacity of the whole of the plurality of batteries based on the selected battery remaining capacity. - View Dependent Claims (2, 3, 4, 5)
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6. A battery remaining capacity measuring apparatus, comprising:
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a plurality of voltage detectors disposed corresponding to a plurality of batteries connected in series, for detecting terminal voltages of the plurality of batteries respectively; a current detector for detecting a current flowing from the plurality of batteries to a load; a voltage and current collector for reading, for each battery, both a voltage value detected by the corresponding voltage detector and a current value detected by the current detector at every predetermined period of time, and collecting a predetermined number of detected voltage values and corresponding detected current values; and a remaining capacity calculator for calculating a battery estimate voltage for each battery based on the predetermined number of detected voltage values and the corresponding detected current values collected by the voltage and current collector, selecting an estimate voltage having a minimum value from out of a plurality of calculated battery estimate voltages, and calculating a battery remaining capacity of the whole of the plurality of batteries based on the selected estimate voltage. - View Dependent Claims (7, 8, 9)
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Specification