초록 ▼

A hybrid battery power source for implantable medical use provides relatively stable resistance during discharge and avoids the voltage delays that develop as a result of variable resistance increase in Li/SVO cells. The hybrid battery power source utilizes two batteries or cells, one being a primar

A hybrid battery power source for implantable medical use provides relatively stable resistance during discharge and avoids the voltage delays that develop as a result of variable resistance increase in Li/SVO cells. The hybrid battery power source utilizes two batteries or cells, one being a primary battery of relatively high energy density and the other being a rechargeable secondary battery of low relatively stable internal resistance. The primary and secondary batteries are connected in a parallel arrangement, preferably via an intermediate voltage boost circuit having an inductor and a pulse generating control circuit therein. The energy storage capacitors of the medical device in which the hybrid battery power source is situated are driven in whole or substantial part by the secondary battery. The primary battery is used to as an energy source for recharging the secondary battery. By arranging the two batteries in parallel, with one serving as a primary battery and the other as a rechargeable secondary battery, all the benefits of the defibrillatory impulse will be obtained and the deficiencies arising from variable voltage delay found in prior art implantable power sources will not be present.

대표청구항 ▼

1. A hybrid battery power source for implantable medical use, comprising:a primary battery; a secondary battery connected to receive power from said primary battery; said secondary battery being adapted to power to an implantable medical device designed for high energy electrical stimulation of body

1. A hybrid battery power source for implantable medical use, comprising:a primary battery; a secondary battery connected to receive power from said primary battery; said secondary battery being adapted to power to an implantable medical device designed for high energy electrical stimulation of body tissue for therapeutic purposes; and a voltage boost circuit between said primary battery and said secondary battery, said voltage boost circuit being adapted to deliver variable width charge pulses at sufficient voltage to charge said secondary battery, and to regulate charge pulse frequency based on a feedback signal from said secondary battery. 2. A hybrid battery power source in accordance with claim 1, wherein said primary battery has higher energy density than said secondary battery.3. A hybrid battery power source in accordance with claim 1, wherein said secondary battery has lower internal resistance than said primary battery.4. A hybrid battery power source in accordance with claim 1, wherein said secondary battery is not subject to voltage delay.5. A hybrid battery power source in accordance with claim 1, wherein said secondary battery has higher voltage potential than said primary battery.6. A hybrid battery power source in accordance with claim 1, wherein said primary battery has high energy density and high relatively unstable internal resistance, and wherein said secondary battery has low energy density and low relatively stable internal resistance.7. A hybrid battery power source in accordance with claim 1, wherein said primary battery is selected from the group consisting of lithium-carbon monofluoride batteries and lithium-silver vanadium oxide batteries, and wherein said secondary battery is selected from the group consisting of lithium-ion batteries.8. A hybrid battery power source in accordance with claim 1, wherein said primary battery and said secondary battery are interconnected in parallel via said voltage boost circuit.9. A hybrid battery power source in accordance with claim 8, wherein said voltage boost circuit comprises a charge pulse generating control circuit and an inductive element.10. A hybrid battery power source in accordance with claim 8, wherein said voltage boost circuit comprises a charge pulse generating control circuit and a flyback transformer.11. An implantable medical device for high energy electrical stimulation of body tissue for therapeutic purposes, comprising:a pair of electrical contacts adapted to provide electrical stimulation to body tissue; energy storage means adapted to provide electrical energy to said electrical contacts; switching means adapted to periodically interconnect said energy storage means to said electrical contacts; and a hybrid battery power source adapted to provide power to said energy storage means and including: a primary battery; a secondary battery connected to receive power from said primary battery and to provide power to said energy storage means; and a voltage boost circuit between said primary battery and said secondary battery, said voltage boost circuit being adapted to deliver variable width charge pulses at sufficient voltage to charge said secondary battery, and to regulate charge pulse frequency based on a feedback signal from said secondary battery. 12. An implantable medical device in accordance with claim 11, wherein said primary battery has higher energy density than said secondary battery.13. An implantable medical device in accordance with claim 11, wherein said secondary battery has lower internal resistance than said primary battery.14. An implantable medical device in accordance with claim 11, wherein said secondary battery is not subject to voltage delay.15. An implantable medical device in accordance with claim 11, wherein said secondary battery has higher voltage potential than said primary battery.16. An implantable medical device in accordance with claim 11, wherein said primary battery has high energy density and high relatively unstable internal resistance, and wherein said secondary battery has low energy density and low relatively stable internal resistance.17. An implantable medical device in accordance with claim 11, wherein said primary battery is selected from the group consisting of lithium-carbon monofluoride batteries and lithium-silver vanadium oxide batteries, and wherein said secondary battery is selected from the group consisting of lithium-ion batteries.18. An implantable medical device in accordance with claim 11, wherein said primary battery and said secondary battery are interconnected in parallel via said voltage boost circuit.19. An implantable medical device in accordance with claim 18, wherein said voltage boost circuit comprises a charge pulse generating control circuit and an inductive element.20. An implantable medical device in accordance with claim 18, wherein said voltage boost circuit comprises a charge pulse generating control circuit and a flyback transformer.21. A method for powering an implantable medical device designed for high energy electrical stimulation of body tissue for therapeutic purposes, comprising:providing a primary power source; providing a secondary power source and connecting it to receive power from said primary power source; connecting said secondary power source to power said implantable medical device designed; and providing a voltage boost circuit between said primary battery and said secondary battery, said voltage boost circuit being adapted to deliver variable width charge pulses at sufficient voltage to charge said secondary battery, and to regulate charge pulse frequency based on a feedback signal from said secondary battery. 22. A method in accordance with claim 21, wherein said primary power source has higher energy density than said secondary battery.23. A method in accordance with claim 21, wherein said secondary battery has lower internal resistance than said primary battery.24. A method in accordance with claim 21, wherein said secondary battery is not subject to voltage delay.25. A method in accordance with claim 21, wherein said secondary battery has higher voltage potential than said primary battery.26. A method in accordance with claim 21, wherein said primary battery has high energy density and high relatively unstable internal resistance, and wherein said secondary battery has low energy density and low relatively stable internal resistance.27. A method in accordance with claim 21, wherein said primary battery is selected from the group consisting of lithium-carbon monofluoride batteries and lithium-silver vanadium oxide batteries, and wherein said secondary battery is selected from the group consisting of lithium-ion batteries.28. A method in accordance with claim 21, wherein said primary battery and said secondary battery are interconnected in parallel via said voltage boost circuit.29. A method in accordance with claim 28, wherein said voltage boost circuit comprises a charge pulse generating control circuit and an inductive element.30. A method in accordance with claim 28, wherein said voltage boost circuit comprises a charge pulse generating control circuit and a flyback transformer.