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US 5,935,728 AGranted
Electrochemical cell having multiplate and jellyroll electrodes with differing discharge rate regions
AssigneeWilson Greatbatch Ltd.
InventorsDavid M. Spillman, Esther S. Takeuchi
Life of this patent
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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 electreolyte.
Claims51
An electrochemical cell, which comprises:
- a) a first electrode comprising a first electrode active material;
- b) a second electrode electrically associated with the first electrode to provide at least a first region and a second region of the cell, wherein the first region and the second region of the cell comprise respective first and second structures of the second electrode electrically associated with the first electrode, the first structure comprising at least one first electrode plate having first and second major surfaces extending to and meeting with spaced apart sides meeting spaced apart ends joined to the sides to provide the at least one first electrode plate having a thickness between the first and second major surfaces defined by widths of the spaced apart sides and widths of the spaced apart ends, wherein at least a portion of the first electrode is in a face-to-face relationship with the first and second major surfaces and with either the spaced apart sides or the spaced apart ends of the at least one first plate comprising the first structure of the second electrode and wherein the second structure of the second electrode is disposed in a jellyroll configuration with a portion of the first electrode;
- and
- c) an electrolyte activating and operatively associating the first electrode and second electrode such that the first region and the second region are dischargeable independent of each other to provide separate and independent sources of electrical energy.
1 more element
An electrochemical cell, comprising:
- a) a casing;
- b) an anode;
- c) a first cathode of a first cathode active material;
- d) a second cathode of a second cathode active material, wherein the first cathode comprises at least one first cathode plate having first and second major surfaces extending to and meeting with spaced apart sides meeting spaced apart ends joined to the sides to provide the at least one cathode plate having a thickness between the first and second major surfaces defined by widths of the spaced apart sides and widths of the spaced apart ends, wherein at least a portion of the anode is in a face-to-face relationship with the first and second major surfaces and with either the spaced apart sides or the spaced apart ends of the at least one first cathode plate comprising the first cathode and wherein the second cathode is disposed in a jellyroll configuration with a portion of the anode;
- and
- e) an electrolyte activating and operatively associating the anode, the first cathode, and the second cathode, and wherein the anode associated with the first cathode and the anode associated with the second cathode are dischargeable independent of each other to provide separate and independent sources of electrical energy.
3 more elements
An electrochemical cell, comprising:
- a) a casing of electrically conductive material;
- b) a first electrochemical cell housed within the casing, the first cell comprising;
- i) an anode comprising alkali metal;
- and
- ii) a first cathode of a first cathode active material selected from the group consisting of a metal, a metal oxide, a mixed metal oxide, a metal sulfide and a carbonaceous compound, and mixtures thereof, wherein the first cathode comprises at least one first cathode plate having first and second major surfaces extending to and meeting with spaced apart sides meeting spaced apart ends joined to the sides to provide the at least one first cathode plate having a thickness between the first and second major surfaces defined by widths of the spaced apart sides and widths of the spaced apart ends, wherein at least a portion of the anode is in a face-to-face relationship with the first and second major surfaces and either the spaced apart sides or the spaced apart ends of the at least one first cathode plate comprising the first cathode;
- c) a second electrochemical cell housed within the casing, the second cell comprising:
- i) the anode;
- and
- ii) a second cathode of a second cathode active material selected from the group consisting of a metal, a metal oxide and a mixed metal oxide, a metal sulfide and combinations thereof, wherein the second cathode is associated with at least a portion of the anode in a jellyroll configuration;
- and
- d) an electrolyte solution operatively associated with the first electrochemical cell and the second electrochemical cell, wherein the first cell is dischargeable independent of the second cell to provide separate and independent sources of electrical energy.
8 more elements
A method of providing an electrochemical cell, comprising the steps of:
- a) providing a casing of electrically conductive material;
- b) housing a first electrochemical cell within the casing, comprising the steps of:
- i) providing an anode comprising alkali metal electrically connected to an anode current collector;
- and
- ii) providing a first cathode of cathode active material electrically connected to a first cathode current collector, wherein the first cathode is electrically associated with a first portion of the anode and comprises at least one first cathode plate having first and second major surfaces extending to and meeting with spaced apart sides meeting spaced apart ends joined to the sides to provide the at least one cathode plate having a thickness between the first and second major surfaces defined by widths of the spaced apart sides and widths of the spaced apart ends, and wherein at least a portion of the anode is in a face-to-face relationship with the first and second major surfaces and either the spaced apart sides or the spaced apart ends of the at least one first cathode plate comprising the first cathode;
- c) housing a second electrochemical cell within the casing, comprising the steps of:
- i) providing a second cathode of cathode active material electrically connected to a second cathode current collector;
- and
- ii) electrically associating the second cathode with a second portion of the anode not already associated with the first cathode, wherein the second cathode is associated with the anode in a jellyroll configuration;
- and
- d) activating the first and second electrochemical cells with an electrolyte solution operatively associated therewith.
8 more elements
Dependencies are inferred from the claim text.