Implantable medical device with dual cell power source
First Claim
1. An implantable medical device comprising:
- a hermetic enclosure;
a low-power control circuit located in the enclosure;
a high-power output circuit located in the enclosure for delivering an electrical pulse therapy; and
a power source and circuitry located in the enclosure for powering the low-power control circuit and the high-power output circuit, the power source and circuitry comprising;
a first, high-rate cell, a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell, wherein the first cell and second cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit, a switching circuit electrically connected between the first, high-rate cell and the low-power control circuit for selectively uncoupling the first, high-rate cell from the low-power control circuit upon activation of the high-power output circuit.
1 Assignment
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Accused Products
Abstract
An implantable medical device having a dual cell power source powering a high-power output circuit and a low-power control circuit. The power source includes a first, high-rate cell and a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell. The first and second cells are electrically connected to the output circuit and control circuit by circuitry. In one embodiment, the circuitry connects the first and second cells in parallel to the output circuit and the control circuit, and includes a switching circuit for selectively uncoupling the first, high-rate cell from the control circuit during a transient high power pulse. In another embodiment, the first and second cells are formed within a single case and are connected in parallel to the output circuit and the control circuit. In another embodiment, the high-rate cell is anode limited, characterized by a rate capability exhibiting minimal dependence on time up to a pre-selected voltage-based ERI at which at least 40 percent of the cathode is consumed.
101 Citations
43 Claims
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1. An implantable medical device comprising:
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a hermetic enclosure;
a low-power control circuit located in the enclosure;
a high-power output circuit located in the enclosure for delivering an electrical pulse therapy; and
a power source and circuitry located in the enclosure for powering the low-power control circuit and the high-power output circuit, the power source and circuitry comprising;
a first, high-rate cell, a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell, wherein the first cell and second cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit, a switching circuit electrically connected between the first, high-rate cell and the low-power control circuit for selectively uncoupling the first, high-rate cell from the low-power control circuit upon activation of the high-power output circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable medical device comprising:
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a hermetic enclosure;
a low-power control circuit located in the enclosure;
a high-power output circuit located in the enclosure for delivering an electrical pulse therapy; and
a power source located in the enclosure for powering the low-power control circuit and the high-power output circuit, the power source comprising;
a case, first anode and cathode bodies disposed within the case and combining to define a first cell, second anode and cathode bodies disposed within the case and combining to define a second cell, an electrolyte contained within the case, wherein the electrolyte commonly activates the first and second cells;
wherein the first and second cells are electrically connected in parallel to the low-power control circuit and the high-power output circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
a switching circuit electrically connected between the first cell and the low-power control circuit for selectively uncoupling the first cell from the low-power control circuit upon activation of the high-power output circuit.
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23. The implantable medical device of claim 14, wherein the first and second cells are connected in parallel internally within the case.
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24. The implantable medical device of claim 14, wherein the second cell includes a reservoir pellet, and the first cell is a wound electrode.
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25. The implantable medical device of claim 24, wherein the second cell further includes an anode body located adjacent the reservoir pellet.
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26. The implantable medical device of claim 24, wherein the first cell is wound about the reservoir pellet.
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27. The implantable medical device of claim 24, wherein the first cell is positioned adjacent the reservoir pellet.
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28. An implantable medical device comprising:
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a hermetic enclosure;
a circuit located in the enclosure including a low-power control circuit and a high-power output circuit;
a power source located in the enclosure for powering the circuit, the power source comprising;
a first, high-rate cell, a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell, circuitry electrically connecting the first and second cells in parallel;
wherein the first and second cells are separately enclosed and are electrically connected to the circuit such that the first and second cells are not independently dischargeable. - View Dependent Claims (29, 30, 31, 32, 33)
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34. An implantable medical device comprising:
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a hermetic enclosure;
a low-power control circuit located in the enclosure;
a high-power output circuit located in the enclosure for delivering an electrical pulse therapy; and
a power source located in the enclosure for powering the low-power control circuit and the high-power output circuit, the power source comprising;
a first, high-rate cell including an anode, a cathode, and an electrolyte and characterized by a rate capability exhibiting minimal dependence on time up to a pre-selected voltage-based ERI at which at least 40 percent of the cathode is consumed, a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification