Monitoring a rechargeable battery with multiple parameter update rates
First Claim
1. A method of monitoring a state of a rechargeable battery comprising:
- repeatedly obtaining at least one measured value related to the battery during discharge of the battery;
repeatedly calculating the state of the battery during discharge of the battery based on a previously calculated state of the battery, the measured value and at least one parameter of the battery;
before the state of the battery passes a threshold value, updating the parameter of the battery at a first rate;
after the state of the battery passes the threshold value, updating the parameter of the battery at a second rate, faster than the first rate; and
correcting the state of the battery in response to each update of the parameter.
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Abstract
Monitoring a state of a rechargeable battery involves repeatedly obtaining at least one measured value related to the battery during discharge of the battery; repeatedly calculating the state of the battery during discharge of the battery based on a previously calculated state of the battery, the measured value and at least one parameter of the battery; before the state of the battery passes a threshold value, updating the parameter of the battery at a first rate; after the state of the battery passes the threshold value, updating the parameter of the battery at a second rate, faster than the first rate; and correcting the state of the battery in response to each update of the parameter.
32 Citations
18 Claims
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1. A method of monitoring a state of a rechargeable battery comprising:
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repeatedly obtaining at least one measured value related to the battery during discharge of the battery; repeatedly calculating the state of the battery during discharge of the battery based on a previously calculated state of the battery, the measured value and at least one parameter of the battery; before the state of the battery passes a threshold value, updating the parameter of the battery at a first rate; after the state of the battery passes the threshold value, updating the parameter of the battery at a second rate, faster than the first rate; and correcting the state of the battery in response to each update of the parameter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery gauge circuitry for monitoring a state of a rechargeable battery comprising:
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at least one input at which data related to the battery is received during discharge of the battery; and a processor electrically connected to receive the data; and wherein the processor; repeatedly revises the state of the battery based on the data, at least one parameter of the battery and a previously revised state of the battery; updates the parameter at a first rate before the state of the battery passes a threshold; updates the parameter at a second rate, faster than the first rate, after the state of the battery passes the threshold; and corrects the state of the battery in response to each update of the parameter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A battery gauge for monitoring a state of a rechargeable battery comprising:
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a means for generating at least one measured value regarding the battery during discharge of the battery; a means for repeatedly revising the state of the battery, during discharge of the battery, based on the measured value and at least one parameter related to the battery; a means for updating the parameter at a plurality of update points at a first update interval before the state of the battery has passed a threshold and at a second update interval, shorter than the first update interval, after the state of the battery has passed the threshold; and a means for correcting the state of the battery in response to updating the parameter. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification