Defibrillator with a reconfigurable battery module
First Claim
1. A medical device, comprising:
- a connection adapted to receive input energy of a first voltage;
an energy storage device;
a battery module coupled to the connection and the energy storage device and having at least two battery cells therein; and
a reconfiguration switch for selectively coupling the at least two battery cells to charge from the first voltage and discharge to the energy storage device at a second voltage larger than the first voltage.
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Accused Products
Abstract
Methods and apparatus are provided for portable medical devices such as defibrillators having different charging and operating voltages. The apparatus comprises a connection for receiving DC input voltage VIN, an energy storage device (e.g., a capacitor), a battery having at least two cells therein coupled to the connection and the capacitor, and switches to selectively reconfigure the battery cells so as to: (i) charge from VIN, and (ii) discharge to the capacitor at VOUT>VIN. The method comprises charging the battery from VIN while its cells are arranged substantially in parallel, then reconfiguring the switches to arrange some of the charged cells substantially in series to give VOUT>VIN, and then charging the capacitor therefrom. The cells are thereafter reconfigured back to the parallel arrangement ready to be recharged from VIN. Isolation switches are conveniently provided to isolate the battery from VIN while charging the capacitor.
57 Citations
20 Claims
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1. A medical device, comprising:
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a connection adapted to receive input energy of a first voltage;
an energy storage device;
a battery module coupled to the connection and the energy storage device and having at least two battery cells therein; and
a reconfiguration switch for selectively coupling the at least two battery cells to charge from the first voltage and discharge to the energy storage device at a second voltage larger than the first voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A defibrillator comprising:
- a power source connection, a capacitor, and a reconfigurable battery module charged from the power source connection during a first cycle and charging the capacitor during a second cycle,
wherein the battery module includes a plurality of secondary cells and a plurality of reconfiguration switches placing interconnections of the secondary cells in a first configuration during the first cycle and in a second configuration during the second cycle. - View Dependent Claims (13, 14, 15, 16, 17)
- a power source connection, a capacitor, and a reconfigurable battery module charged from the power source connection during a first cycle and charging the capacitor during a second cycle,
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18. A method comprising:
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charging a battery module of a medical device while cells of the module are in a first interconnection configuration;
then adjusting switches of the medical device to place the cells in a second interconnection configuration; and
then charging a capacitor of the medical device. - View Dependent Claims (19, 20)
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Specification