High power implantable battery with improved safety and method of manufacture
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, said power source and circuitry further comprising;
a first high-rate cell having a resistance R;
a second high-rate cell having a resistance R;
wherein the first high-rate cell and second high-rate cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit; and
at least one resistive load having a resistance at least 10 times greater than the resistance R electrically connected between the first high-rate cell and the second high-rate cell, the at least one resistive load having a resistive value to limit, in the event the first high-rate cell being internally shorted, the rate at which such internally shorted first high-rate cell drains the second high-rate cell.
1 Assignment
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Accused Products
Abstract
Implantable medical devices in embodiments of the invention may include one or more of the following features: (a) a hermetic enclosure, (b) a low-power control circuit located in the enclosure, (c) a high-power output circuit located in the enclosure for delivering an electrical pulse therapy, (d) 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, (e) a first high-rate cell, (f) a second high-rate cell electrically connected in parallel to the low-power control circuit and the high-power output circuit, (g) and at least one resistive load electrically connected between the first high-rate cell and the second high-rate cell, the at least one resistive load having a resistive value to limit, in the event of an internal short in one of the high-rate cells, the rate by which the shorted high-rate cell drains the other high-rate cell.
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Citations
33 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, said power source and circuitry further comprising; a first high-rate cell having a resistance R; a second high-rate cell having a resistance R; wherein the first high-rate cell and second high-rate cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit; and at least one resistive load having a resistance at least 10 times greater than the resistance R electrically connected between the first high-rate cell and the second high-rate cell, the at least one resistive load having a resistive value to limit, in the event the first high-rate cell being internally shorted, the rate at which such internally shorted first high-rate cell drains the second high-rate cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device having a hermetic enclosure for an, electrochemical battery, comprising:
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a) a first high-rate electrochemical cell having a resistance R comprising; i) a first anode; ii) a first terminal for connecting the first anode to a first external lead; iii) a first electrolyte operatively associated with the first anode; and b) a second high-rate electrochemical cell having a resistance R comprising; i) a second anode; ii) a second terminal for connecting the second anode to a second external lead; iii) a second electrolyte operatively associated with the second anode; and c) a cathode electrically associated with the first electrolyte and the second electrolyte, wherein the first cell being connected in parallel to the second cell; and d) at least one resistive load having a resistance at least 10 times greater than the resistance R electrically connected between the first external lead and the second external lead. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for manufacturing an implantable medical device having a hermetic enclosure for an, electrochemical battery comprising the steps of:
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a) providing a first high-rate electrochemical cell having a resistance R, comprising the steps of; i) providing a first cathode; ii) connecting a first external lead to the first cathode; iii) activating the first high-rate cell with an electrolyte solution operatively associated with the first cathode; and b) providing a second high-rate electrochemical cell having a resistance R, comprising the step of; i) providing a second cathode; ii) connecting a second external lead to the second cathode; ii) activating the second electrochemical cell with the electrolyte solution operatively associated with the second cathode; and c) associating an anode electrically with the electrolyte in the first high-rate cell and the second high-rate cell, wherein the first cell being connected in parallel to the second cell; and d) connecting at least one resistive load having a resistance at least 10 times greater than the resistance R electrically between the first external lead and the second external lead. - View Dependent Claims (22, 23, 24, 25)
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26. A method for manufacturing an implantable medical device comprising the steps of:
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a) providing a hermetic enclosure; b) providing a low-power control circuit in the enclosure; c) providing a high-power output circuit in the enclosure for delivering an electrical pulse therapy; and d) providing a power source and circuitry in the enclosure for powering the low-power control circuit and the high-power output circuit, comprising the steps of; i) providing a first high-rate cell having a resistance R; ii) providing a second high-rate cell having a resistance R; iii) connecting the first cell and second cell electrically in parallel to the low-power control circuit and the high-power output circuit; and iv) connecting at least one resistive load having a resistance at least 10 times greater than the resistance R electrically between the first high-rate cell and the second high-rate cell. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. 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, said power source and circuitry further comprising; a first high-rate cell; a second high-rate cell; wherein the first high-rate cell and second high-rate cell are electrically connected in parallel to the low-power control circuit and the high-power output circuit, the first high-rate cell and the second high-rate cell includes an anode, and further wherein the first high-rate cell and the second high-rate cell share a common cathode; and at least one resistor electrically connected between the first high-rate cell and the second high-rate cell, the at least one resistive load having a resistive value to limit, in the event the first high-rate cell being internally shorted, the rate at which such internally shorted first high-rate cell drains the second high-rate cell, wherein the at least one resistive load value being between 10 ohms and 100 ohms, wherein the first high-rate cell and the second high-rate cell include an electrode surface being between 65 cm2 and 90 cm2.
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Specification