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US 7,208,914 B2Granted
Apparatus and method for predicting the remaining discharge time of a battery
AssigneeMidtronics, Inc.
InventorJames K. Klang
Life of this patent
Estimating the term…
Abstract
A method and apparatus for predicting the remaining discharge time of a battery are provided. The method includes measuring a dynamic parameter of the battery, obtaining a discharge current of the battery, measuring a voltage of the battery and obtaining a temperature of the battery. The remaining run time of the battery is predicted as a function of the measured battery dynamic parameter, the discharge current, the measured battery voltage, the battery temperature, a full charge battery dynamic parameter and an estimated capacity of the battery.
Claims15
A method comprising:
- (a) measuring a dynamic parameter of a battery;
- (b) obtaining a discharge current of the battery;
- (c) measuring a voltage of the battery;
- (d) obtaining a temperature of the battery;
- and
- (e) predicting a remaining run time of the battery as a function of the measured battery dynamic parameter, the discharge current, the measured battery voltage, the battery temperature, a full charge battery dynamic parameter, a non-zero minimum terminal voltage value of the battery and an estimated capacity of the battery.
3 more elements
An apparatus comprising:
- a positive connector coupled to a positive terminal of a battery;
- a negative connector coupled to a negative terminal of the battery;
- a voltage sensor configured to measure a voltage of the battery;
- a temperature sensor configured to measure a temperature of the battery;
- a current sensor configured to measure a discharge current of the battery;
- and
- processing circuitry configured to measure a dynamic parameter of the battery using the first and second connectors, and to predict a remaining run time of the battery as a function of the measured battery dynamic parameter, the discharge current, the measured battery voltage, the battery temperature, a full charge battery dynamic parameter, a non-zero minimum terminal voltage value of the battery and an estimated capacity of the battery.
4 more elements
Dependencies are inferred from the claim text.