SCREEN-LESS ANODE DESIGN CONCEPTS FOR LOW COST LITHIUM ELECTROCHEMICAL CELLS FOR USE IN IMPLANTABLE MEDICAL DEVICE APPLICATIONS
First Claim
1. An electrochemical cell, which comprises:
- a) a casing;
b) an anode comprising;
i) a body of lithium as an anode active material having an upper edge and a spaced apart lower edge defining an anode height, both the upper and lower edges extending to and meeting with right and left edges defining an anode width; and
ii) an anode current collector as a metal strip devoid of perforations and having a length extending from a distal end of a distal portion to a proximal end of at least one proximal portion contacted by the lithium body, the distal end being electrically connected to an anode terminal; and
c) a cathode of at least one cathode active material contacted to at least one side of a cathode current collector;
d) a separator disposed between the anode and the cathode to prevent direct physical contact between them; and
e) a nonaqueous electrolyte activating the anode and the cathode housed inside the casing.
5 Assignments
0 Petitions
Accused Products
Abstract
A new cathode design having a first cathode active material of a relatively low energy density but of a relatively high rate capability contacted to one side of a current collector and a second cathode active material having a relatively high energy density but of a relatively low rate capability contacted to the opposite side thereof is described. A preferred cathode is: SVO/current collector/CFx with the CFx facing a lithium anode body devoid of a screen-type current collector. The lithium anode is either supported directly on the inner casing sidewall or is contacted to a relatively small strip of metal devoid of perforations and serving as an anode current collector electrically connected to the negative terminal.
-
Citations
32 Claims
-
1. An electrochemical cell, which comprises:
-
a) a casing; b) an anode comprising; i) a body of lithium as an anode active material having an upper edge and a spaced apart lower edge defining an anode height, both the upper and lower edges extending to and meeting with right and left edges defining an anode width; and ii) an anode current collector as a metal strip devoid of perforations and having a length extending from a distal end of a distal portion to a proximal end of at least one proximal portion contacted by the lithium body, the distal end being electrically connected to an anode terminal; and c) a cathode of at least one cathode active material contacted to at least one side of a cathode current collector; d) a separator disposed between the anode and the cathode to prevent direct physical contact between them; and e) a nonaqueous electrolyte activating the anode and the cathode housed inside the casing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An electrochemical cell, which comprises:
-
a) a casing; b) an anode comprising; i) lithium as an anode active material having an upper edge and a spaced apart lower edge defining an anode height, both the upper and lower edges extending to and meeting with right and left edges defining an anode width; and ii) an anode current collector as a metal strip devoid of perforations and having a length extending from a distal end of a distal portion to a proximal end of at least one proximal portion contacted by the lithium body, the distal end being electrically connected to an anode terminal; and a cathode of a first cathode active material, having a relatively low energy density but a relatively high rate capability contacted to one side of a cathode current collector and with a second cathode active material having a relatively high energy density but a relatively low rate capability contacted to the other side of the cathode current collector; d) a separator disposed between the anode and the cathode to prevent direct physical contact between them; and e) a nonaqueous electrolyte activating the anode and the cathode housed inside the casing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. An implantable medical device, which comprises:
- a housing;
a control circuitry contained inside the housing to control functioning of the medical device; and
an electrochemical cell contained inside the housing for powering the control circuitry, the improvement in the cell comprising;a) a casing; b) an anode comprising; i) a body of lithium as an anode active material having an upper edge and a spaced apart lower edge defining an anode height, both the upper and lower edges extending to and meeting with right and left edges defining an anode width; and ii) an anode current collector as a metal strip devoid of perforations and having a length extending from a distal end of a distal portion to a proximal end of at least one proximal portion contacted by the lithium body, the distal end being electrically connected to an anode terminal; and c) a cathode of a first cathode active material having a relatively low energy density but a relatively high rate capability contacted to one side of a cathode current collector with a second cathode active material having a relatively high energy density but a relatively low rate capability contacting the opposite side of the cathode current collector, and wherein the second cathode active material faces the anode; d) a separator disposed between the anode and the cathode to prevent direct physical contact between them; and e) a nonaqueous electrolyte activating the anode and the cathode housed inside the casing. - View Dependent Claims (23, 24)
- a housing;
-
25. A method for providing an electrochemical cell, comprising the steps of:
-
a) providing a casing; b) providing an anode comprising; i) a body of lithium as an anode active material having an upper edge and a spaced apart lower edge defining an anode height, both the upper and lower edges extending to and meeting with right and left edges defining an anode width; and ii) an anode current collector as a metal strip devoid of perforations and having a length extending from a distal end of a distal portion to a proximal end of at least one proximal portion contacted by the lithium body, the distal end being electrically connected to an anode terminal; and c) providing a cathode of a cathode active material; d) disposing a separator between the anode and the cathode to prevent direct physical contact between them housed inside the casing; and activating the anode and the cathode with a nonaqueous electrolyte. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
-
Specification