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Battery system for implantable medical device
| Details |
Inventors: Maile, Keith R.; Warren, Jay A.;
Assignee: Cardiac Pacemakers, Inc. (St. Paul, MN)
Primary Examiner: Maples; John S.
Assistant Examiner:
Attorney, Agent or Firm: Schwegan, Lundberg, Woessner & Kluth, P.A.
A battery system and method of manufacture in which at least two batteries, having different chemistries, are integrated into a common housing. The battery system has a unitary housing having at least two chambers, in which each pair of adjacent chambers share a common wall. Each chamber contains one battery, and at least one battery has a different chemical composition than the remaining batteries. |
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DETAILED DESCRIPTION The present battery system provides a dual battery system for use within an implantable medical device.
The battery housings of the system share a common wall.
The shared common wall of the dual battery system reduces the weight and volume of the battery system, and thus the weight and volume of the implantable medical device.
The result is a smaller, lighter, and more comfortable device for the patient.
The invention provides a battery system including (1) a unitary battery housing having a plurality of chambers; (2) a common wall between adjacent chambers; and (3) a plurality of batteries.
In one embodiment, the battery system has a unitary housing having at least two chambers, in which each pair of adjacent chambers share a common wall.
Each chamber contains one battery, and at least one battery of the system has a different chemical composition than any or all of the remaining batteries.
In one application of the battery system, the battery is used in an ICD.
The battery system comprises a unitary housing having a plurality of walls defining a first and a second chamber.
The plurality of walls includes a common wall between the first chamber and the second chamber.
Housed within the first chamber is a first electrochemical cell having a first cathode, a first anode, and a first electrolyte between the first cathode and the first anode.
The second chamber houses a second cathode, a second anode, and a second electrolyte between the second cathode and the second anode.
The two electrochemical cells have different chemical compositions such that one electrochemical cell can supply, for example, a energy dense low current output, in the microampere range, while the other electrochemical cell can supply a power dense high current output, in the ampere range.
In this way the battery system can supply the distinct electrical needs of the various components of the implanted device while conserving both volume and weight of the implanted device.
In alternative embodiments, different numbers and locations of chambers can also be used to house the electrochemical cells
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MEMS 
