IMPLANTABLE MEDICAL DEVICE POWERED BY RECHARGEABLE BATTERY
First Claim
Patent Images
1. A system, comprising:
- an implantable medical device including a power source including;
a rechargeable battery;
a battery status monitor coupled to the rechargeable battery, the battery status monitor adapted to monitor a parameter indicative of state of charge of the rechargeable battery;
a recharging controller coupled to the battery status monitor, the recharging controller adapted to control a process of recharging the rechargeable battery using the parameter, the process including a fast-charge phase and a trickle-charge phase; and
a recharging circuit coupled to the recharging controller and the rechargeable battery, the recharging circuit including;
a power receiver adapted to receive a power-transmission signal; and
a power converter adapted to convert the power-transmission signal to a constant-current signal during the fast-charge phase and to a constant-voltage signal during the trickle-charge phase.
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Abstract
A battery management circuit provides an implantable medical device with power management that allows safe and efficient use of a rechargeable battery. Various ways of monitoring the energy level of the rechargeable battery and controlling the battery recharging process for user convenience and safety are provided.
151 Citations
49 Claims
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1. A system, comprising:
an implantable medical device including a power source including;
a rechargeable battery;
a battery status monitor coupled to the rechargeable battery, the battery status monitor adapted to monitor a parameter indicative of state of charge of the rechargeable battery;
a recharging controller coupled to the battery status monitor, the recharging controller adapted to control a process of recharging the rechargeable battery using the parameter, the process including a fast-charge phase and a trickle-charge phase; and
a recharging circuit coupled to the recharging controller and the rechargeable battery, the recharging circuit including;
a power receiver adapted to receive a power-transmission signal; and
a power converter adapted to convert the power-transmission signal to a constant-current signal during the fast-charge phase and to a constant-voltage signal during the trickle-charge phase. - View Dependent Claims (2, 3, 4, 5)
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6. A method for operating an implantable medical device, the method comprising:
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detecting a parameter indicative of an energy level of a rechargeable battery of the implantable medical device;
controlling a process of recharging the rechargeable battery using the parameter, the process including a fast-charge phase and a trickle-charge phase;
charging the rechargeable battery using a constant current during the fast-charge phase; and
charging the rechargeable battery using a constant voltage during the trickle-charge phase. - View Dependent Claims (7, 8, 9, 10)
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11. A system, comprising:
an implantable medical device including a power source including;
a rechargeable battery;
a recharging circuit coupled to the rechargeable battery, the recharging circuit adapted to recharge the rechargeable battery; and
a recharging controller coupled to the recharging circuit, the recharging controller adapted to suspend the recharging of the rechargeable battery during a primary period and to control the recharging of the rechargeable battery during a secondary period, the recharging controller including;
a primary period timer adapted to initiate the primary period in response to an initiation signal; and
a secondary period timer adapted to initiate the secondary period when the primary period expires. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for operating an implantable medical device, the method comprising:
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initiating a primary period in response to an initiation signal;
initiating a secondary period in response to a termination of the primary period;
suspending recharging of a rechargeable battery of the implantable medical device during the primary period; and
controlling the recharging of the rechargeable battery during the secondary period. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A system, comprising:
an implantable medical device including;
a feature circuit including one or more of a sensing circuit to sense one or more physiological signals and an electrical stimulation circuit to deliver electrical stimulation; and
a power source adapted to provide power to the feature circuit, the power source including;
a rechargeable battery;
a non-rechargeable battery;
a battery status monitor coupled to the rechargeable battery and the non-rechargeable battery, the battery status monitor adapted to detect at least one of a first energy level of the rechargeable battery and a second energy level of the non-rechargeable battery; and
a battery switch coupled between the feature circuit and the power source, the battery switch adapted to selectively provide an electrical connection between the feature circuit and one of the rechargeable battery and the non-rechargeable battery using at least one of the first energy level and the second energy level. - View Dependent Claims (29, 30, 31, 32)
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33. A method for operating an implantable medical device including a rechargeable battery and a non-rechargeable battery, the method comprising:
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detecting at least one of a first energy level of the rechargeable battery and a second energy level of the non-rechargeable battery; and
selecting one of the rechargeable battery and the non-rechargeable battery to power the implantable medical device using at least one of the first energy level and the second energy level. - View Dependent Claims (34, 35, 36, 37)
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38. An system, comprising:
an implantable sensor module including;
a pressure sensor to sense a signal indicative of a blood pressure; and
a power source adapted to provide power to the pressure sensor, the power source including;
a rechargeable battery;
a battery status monitor coupled to the rechargeable battery, the battery status monitor adapted to detect an energy level of the rechargeable battery;
a recharging controller coupled to the battery status monitor, the recharging controller adapted to control a process of recharging the rechargeable battery using the energy level; and
a recharging circuit coupled to the recharging controller and the rechargeable battery, the recharging circuit including;
an ultrasonic power receiver to receive an ultrasonic signal carrying an ultrasonic energy; and
a piezoelectric transducer to convert the ultrasonic energy to an electrical energy for recharging the rechargeable battery. - View Dependent Claims (39, 40, 41, 42, 43)
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44. A method for operating a medical device system, the method comprising:
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sensing a signal indicative of a blood pressure using a first implantable medical device;
powering a circuit of the first implantable medical device using a rechargeable battery;
detecting an energy level of the rechargeable battery;
receiving an ultrasonic signal carrying an ultrasonic energy from an external system;
converting the ultrasonic energy to an electrical energy;
recharging the rechargeable battery using the electrical energy; and
controlling the recharging the rechargeable battery using the energy level. - View Dependent Claims (45, 46, 47, 48, 49)
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Specification