Electrochemical cell having multiplate and jellyroll electrodes with differing discharge rate regions
AssigneeWilson Greatbatch Ltd.
InventorsDavid M. Spillman, Esther S. Takeuchi
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Abstract
An electrochemical cell comprising a medium rate electrode region intended to be discharged under a substantially constant drain and a high rate electrode region disposed in a jellyroll wound configuration intended to be pulse discharged, is described. Both electrode regions share a common anode and are activated with the same electrolyte.
Claims21
An electrochemical cell comprising a first electrode comprising a first electrode active material and a second electrode electrically associated with the first electrode to provide a first region having a first effective interelectrode surface area between the first and second electrodes and to provide a second, jellyroll region having a second effective interelectrode surface area between the first and second electrodes, and wherein the first region provides the cell dischargeable at a relatively low electrical current of about 1 microampere to about 100 milliamperes corresponding to a C-rate of about C/2,300,000 to about C/23, and wherein the second region provides the cell dischargeable at a relatively high electrical current of about 1 to about 4 amperes corresponding to a C-rate of about C/2.3 to about C/0.575.
An electrochemical cell capable of delivering electrical current in a first range of currents and which is independently and simultaneously capable of delivering electrical current in a second range of currents greater than the first range and wherein the second range of electrical current is provided by a portion of the electrodes comprising the cell disposed in a jellyroll configuration.
In combination with an implantable medical device requiring electrical power for a monitoring function and for a device operating function, an electrochemical cell which is capable of providing an electrical current of about 1 microamperes to about 100 milliamperes corresponding to a C-rate of about C/2,300,000 to about C/23 for the monitoring function, and wherein the electrochemical cell is independently and simultaneously capable of delivering electrical pulse currents of about 1 ampere to about 4 amperes corresponding to a C-rate of about C/2.3 to about C/0.575 for the device operating function and wherein the electrical pulse currents for the device operating function are provided by a portion of the electrodes of the electrochemical cell disposed in a jellyroll configuration.
In combination with an implantable medical device requiring electrical power for a monitoring function and a device operating function, an electrochemical cell comprising:
- a) a medium rate, constant dischargeable or constant drain electrochemical couple for providing low level currents for the monitoring function;
- b) a high rate, pulse dischargeable electrochemical couple provided in a jellyroll configuration for providing high level current for the operating function;
- and
- c) a single casing means containing both couples wherein the medium rate, constant drain couple and the high rate, pulse dischargeable couple share the same anode.
Dependencies are inferred from the claim text.