Battery status indicator compensating for battery voltage recovery
First Claim
1. A method for determining a recovery voltage associated with a battery, the method comprising:
- detecting a transient increased current draw event that draws current from the battery at a current level that is greater than a steady-state average current level, the transient increased current draw event starting at a start time and ending at an end time;
selecting a battery voltage measurement obtained after the end time based on time-related or voltage-related criteria; and
determining the recovery voltage using the battery voltage measurement, wherein the recovery voltage represents a voltage level to which battery voltage is expected to recover after the transient increased current draw event.
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Accused Products
Abstract
A method for determining a recovery voltage in a battery includes detecting a transient increased current draw event drawing current from the battery, the transient increased current draw event starting at a start time and ending at an end time; and in response to detecting the transient increased current draw event, waiting until time and/or voltage criteria are met to determine recovered battery voltage. An implantable pulse generator (PG) device for stimulating a human organ includes a battery, a power sink drawing current from the battery, wherein drawing increased current from the battery for transient periods causes battery voltage to decrease; and a status indicator detecting a transient increased current draw event and waiting a minimum time duration after the transient increased current draw event to measure battery voltage in order to determine a recovery voltage.
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Citations
23 Claims
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1. A method for determining a recovery voltage associated with a battery, the method comprising:
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detecting a transient increased current draw event that draws current from the battery at a current level that is greater than a steady-state average current level, the transient increased current draw event starting at a start time and ending at an end time; selecting a battery voltage measurement obtained after the end time based on time-related or voltage-related criteria; and determining the recovery voltage using the battery voltage measurement, wherein the recovery voltage represents a voltage level to which battery voltage is expected to recover after the transient increased current draw event. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer-readable medium having processor-executable instructions, which when executed by a processor cause the processor to perform a process for determining a recovery voltage associated with a battery, the process comprising:
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detecting a transient increased current draw event that draws current from the battery at a current level that is greater than a steady-state average current level, the transient increased current draw event starting at a start time and ending at an end time; obtaining a first measured battery voltage at a first measurement time after the end time; obtaining a subsequent measured battery voltage at a subsequent measurement time after the first measurement time; and determining the recovery voltage by determining whether the difference between the first measured battery voltage and the subsequent measured battery voltage is less than a specified voltage change. - View Dependent Claims (9, 10, 11)
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12. An implantable pulse generator (PG) device operable to stimulate an organ, the PG device comprising:
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a battery; a power sink drawing current from the battery at a steady-state level when a high current function is deactivated and drawing current from the battery at an increased level when the high current function is activated, wherein drawing current at the increased level causes a drop in battery voltage and a subsequent return to drawing current at the steady-state level causes an increase in battery voltage toward a recovery voltage; a control module controlling the power sink and triggering a transient increased current draw event comprising drawing current at the increased level for a time period followed by drawing current at the steady-state level; and a status indicator module detecting the transient increased current draw event and waiting a minimum time duration after the transient increased current draw event to determine the recovery voltage using a battery voltage measurement. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A system comprising:
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a power sink requiring power to operate; a battery delivering increased current to the power sink at a specified time, wherein delivery of increased current to the power sink causes a drop in battery voltage and a subsequent voltage recovery; and means for determining a recovery voltage using a battery voltage measurement, wherein determining the recover voltage includes computing a rate of change of voltage during the voltage recovery. - View Dependent Claims (21, 22, 23)
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Specification