BATTERY DEPTH OF DISCHARGE IN AN IMPLANTABLE DEVICE
First Claim
1. A system for determining depth of discharge for a battery in an implantable medical device, comprising:
- at least one voltage sensor adapted to sense voltage of the battery;
a memory adapted to store voltage recovery data subsequent to a voltage discharge event from one or more implantable devices; and
a controller connected to the memory and in communication with the implantable medical device, the controller adapted to measure voltage recovery based on sensed voltage, to store voltage recovery data in the memory, and to compare measured voltage recovery data with stored voltage recovery data to determine battery depth of discharge.
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Accused Products
Abstract
Systems and methods for determining depth of discharge for implantable device batteries are provided. One aspect of this disclosure relates to a method for determining depth of discharge for a battery in an implantable medical device. Voltage recovery of the battery is measured subsequent to a predetermined event. Measured voltage recovery data is stored in a database adapted to store data for one or more devices. Measured voltage recovery data is compared with stored voltage recovery data to determine battery depth of discharge. According to various embodiments, battery capacity consumed is measured using a coulometer and using a capacity-by-voltage device. Measured battery capacity consumed is combined with measured voltage recovery data using a predetermined weighted average, and the combined data is stored in the database. The stored data is used to determine battery depth of discharge, according to an embodiment.
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Citations
21 Claims
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1. A system for determining depth of discharge for a battery in an implantable medical device, comprising:
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at least one voltage sensor adapted to sense voltage of the battery; a memory adapted to store voltage recovery data subsequent to a voltage discharge event from one or more implantable devices; and a controller connected to the memory and in communication with the implantable medical device, the controller adapted to measure voltage recovery based on sensed voltage, to store voltage recovery data in the memory, and to compare measured voltage recovery data with stored voltage recovery data to determine battery depth of discharge. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining depth of discharge for a battery in an implantable medical device, comprising:
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measuring voltage recovery of the battery subsequent to a predetermined event; storing measured voltage recovery data in a database adapted to store data for one or more devices; and comparing measured voltage recovery data with stored voltage recovery data to determine battery depth of discharge. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for determining capacity consumed for a battery in an implantable medical device, comprising:
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measuring battery capacity consumed using voltage recovery as an indication of depth of depletion of the battery; measuring battery capacity consumed using a coulometer; measuring battery capacity consumed using a capacity-by-voltage device; and combining the measurements from voltage recovery and at least one of the coulometer and the capacity-by-voltage device using a weighted average to determine battery capacity consumed data. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification