Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system
First Claim
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1. A method of accurately tracking available charge stored in a transcutaneous energy transfer system, comprising:
- utilizing fuel gauge circuitry to record a plurality of metrics of a transcutaneous energy transfer system associated with an implantable device, said plurality of metrics including battery temperature;
utilizing a controller to determine the current charge remaining in a rechargeable battery pack based on said plurality of metrics;
utilizing the fuel gauge circuitry to measure the current rate of power consumption for the implantable device;
utilizing the controller to determine the remaining time before the energy level of the battery pack is below a predetermined threshold level at the measured rate of power consumption; and
utilizing the controller to communicate the remaining time before exhaustion of the battery pack to a user.
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Abstract
Improved devices and methods for tracking power consumption and available charge in a transcutaneous energy transfer (TET) system are provided. The method includes measuring the available charge in a battery and the current rate of power consumption in an implanted medical device, determining the remaining time before the charge level of the battery reaches a predetermined threshold level, and communicating the remaining time to a user.
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Citations
13 Claims
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1. A method of accurately tracking available charge stored in a transcutaneous energy transfer system, comprising:
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utilizing fuel gauge circuitry to record a plurality of metrics of a transcutaneous energy transfer system associated with an implantable device, said plurality of metrics including battery temperature; utilizing a controller to determine the current charge remaining in a rechargeable battery pack based on said plurality of metrics; utilizing the fuel gauge circuitry to measure the current rate of power consumption for the implantable device; utilizing the controller to determine the remaining time before the energy level of the battery pack is below a predetermined threshold level at the measured rate of power consumption; and utilizing the controller to communicate the remaining time before exhaustion of the battery pack to a user. - View Dependent Claims (2, 3, 4, 5, 13)
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6. An implantable device, comprising:
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an implantable assist device; a rechargeable battery pack; and a controller connected to the implantable assist device and rechargeable battery pack; wherein the controller is configured to measure the charge level of the battery pack, based on a plurality of metrics, said metrics including battery temperature, measure a power consumption rate of the implantable assist device, compute the remaining time before the battery pack energy level reaches a predetermined threshold level, and communicate the remaining time to a user. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification