SYSTEM AND METHOD FOR MONITORING THE STATE OF CHARGE OF A BATTERY
First Claim
1. A process for monitoring the status of a battery, comprising the steps of:
- measuring a battery current;
comparing the battery current to a predetermined threshold;
determining, from the battery current comparison, the battery status as one of charging, discharging and quiescent;
for a battery charging status determination, computing the charging state of charge of the battery;
for battery discharge status determination, comparing the discharge current to a predetermined threshold, selecting, based upon the result of the discharge current comparison, a basis for the discharge current from one of a plurality of predetermined discharge conditions, and computing the discharging state of charge of the battery for the select discharge condition; and
for quiescent status, computing the quiescent state of charge of the battery; and
providing the computed state of charge of the battery in a quantitative form.
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Accused Products
Abstract
A process for monitoring the status of a battery. Steps of the process include measuring a battery current and comparing the battery current to a predetermined threshold. A battery status is determined as one of charging, discharging and quiescent. For a battery charging status determination, the charging state of charge of the battery is computed. For battery discharge status determination, the discharge current is compared to a predetermined threshold. Based upon the discharge current comparison, a basis for the discharge current is selected from one of a plurality of predetermined discharge conditions and the discharging state of charge of the battery is computed for the select discharge condition. For a quiescent status, the quiescent state of charge of the battery is computed. The computed state of charge of the battery is provided in a quantitative form.
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Citations
14 Claims
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1. A process for monitoring the status of a battery, comprising the steps of:
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measuring a battery current; comparing the battery current to a predetermined threshold; determining, from the battery current comparison, the battery status as one of charging, discharging and quiescent; for a battery charging status determination, computing the charging state of charge of the battery; for battery discharge status determination, comparing the discharge current to a predetermined threshold, selecting, based upon the result of the discharge current comparison, a basis for the discharge current from one of a plurality of predetermined discharge conditions, and computing the discharging state of charge of the battery for the select discharge condition; and for quiescent status, computing the quiescent state of charge of the battery; and providing the computed state of charge of the battery in a quantitative form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for monitoring the status of a battery, comprising:
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a battery; a charger configured to charge the battery; a controller to control the charging operation of the charger; a plurality of signal inputs from the battery to the monitoring portion of the controller; a load coupled to the battery; and a monitoring portion to monitor the state of the battery, the monitoring portion being configured to compare the battery current to a predetermined threshold;
determine, from the battery current comparison, the battery status as one of charging, discharging and quiescent;
for a battery charging status determination, compute the charging state of charge of the battery;
for battery discharge status determination, compare the discharge current to a predetermined threshold, selecting, based upon the discharge current comparison, a basis for the discharge current from one of a plurality of predetermined discharge conditions, and compute the discharging state of charge of the battery for the select discharge condition;
for quiescent status, compute the quiescent state of charge of the battery; and
provide the computed state of charge of the battery in a quantitative form. - View Dependent Claims (11, 12, 13, 14)
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Specification