Implantable Medical Device with a Primary and Rechargeable Battery
First Claim
1. An implantable medical device, comprising:
- a primary battery;
a rechargeable battery;
a power supply node configured to provide power to first operative circuitry in the implantable medical device; and
control circuitry,wherein the control circuitry is configured to(a) couple the primary battery to the power supply node until a voltage of the primary battery is at or below a first threshold, after which the control circuitry is configured to,(b) couple the rechargeable battery to the power supply node and decouple the primary battery from the power supply node if a voltage of the rechargeable battery is at or above a second threshold.
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Abstract
An implantable medical device (IMD) having a rechargeable and primary battery is disclosed, as are algorithms for automatically selecting use of these batteries at particular times. In one IMD embodiment, the primary battery acts as the main battery, and an algorithm allows the IMD to draw power from the primary battery until its voltage reaches a threshold, after which the algorithm allows the IMD to draw power from the rechargeable battery when it is sufficiently charged. In another IMD embodiment, the rechargeable battery acts as the main battery, and an algorithm allows the IMD to draw power from the rechargeable battery if it is sufficiently charged; otherwise, the algorithm allows the IMD to draw power from the primary battery. Further disclosed are techniques for telemetering data relevant to both batteries to an external device, and for allowing a patient to choose use of a particular one of the batteries.
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Citations
22 Claims
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1. An implantable medical device, comprising:
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a primary battery; a rechargeable battery; a power supply node configured to provide power to first operative circuitry in the implantable medical device; and control circuitry, wherein the control circuitry is configured to (a) couple the primary battery to the power supply node until a voltage of the primary battery is at or below a first threshold, after which the control circuitry is configured to, (b) couple the rechargeable battery to the power supply node and decouple the primary battery from the power supply node if a voltage of the rechargeable battery is at or above a second threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An implantable medical device, comprising:
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a primary battery; a rechargeable battery; a power supply node configured to provide power to first operative circuitry in the implantable medical device; and a control circuitry, wherein the control circuitry is configured to (a) couple the rechargeable battery to the power supply node and decouple the primary battery from the power supply node if a voltage of the rechargeable battery is at or above a second threshold lower than a maximum voltage to which the rechargeable battery can be charged, after which the control circuitry is configured to, (b) couple the primary battery to the power supply node if the voltage of the rechargeable battery is at or below a third threshold, and if a voltage of the primary battery is above a fourth threshold.
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Specification