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US 6,641,953 B2Granted
Secondary cell with high rate pulse capability
AssigneeWilson Greatbatch Ltd.
InventorsEsther S. Takeuchi, Robert S. Rubino, Hong Gan
Life of this patent
Estimating the term…
Abstract
A rechargeable lithium-ion cell capable of being discharged to deliver high power pulses sufficient for implantable defibrillation applications and the like, is described. The cell is housed in a casing having an external volume of 5 cm3, or less. Both the negative and positive electrodes are less than about 0.15 mm in total thickness. Negative and positive electrodes of a reduced thickness provide the cell with high electrode surface area relative to its volume. As such, the present cell is capable of providing pulses in excess of 30C with minimal voltage drop.
Claims52
An electrochemical cell, which comprises:
- a) a casing;
- b) a negative electrode of an anode material that intercalates and deintercalates with an alkali metal and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein the anode material contacted to at least one of the first and second major sides is about 0.07 mm thick, or less;
- c) a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein the cathode active material contacted to at least one of the third and fourth major sides is about 0.0625 mm thick, or less;
- and
- d) an electrolyte solution activating the negative and positive electrodes housed inside the casing.
2 more elements
An electrochemical cell, which comprises:
- a) a negative electrode of a carbonaceous material that intercalates and deintercalates with lithium and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein the carbonaceous material contacted to at least one of the first and second major sides is about 0.0175 mm to about 0.07 mm thick;
- b) a positive electrode comprising lithium cobalt oxide that intercalates and deintercalates with lithium and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein the lithium cobalt oxide contacted to at least one of the third and fourth major sides is about 0.0215 mm to about 0.0625 mm thick;
- c) an electrolyte solution activating the negative electrode and the positive electrode;
- and
- d) a casing housing the activated negative and positive electrodes.
2 more elements
In combination with an implantable medical device requiring at least one current pulse for a medical device operating function, a first electrochemical cell which is dischargeable to deliver the current pulse electrically coupled to a second electrochemical cell, the first cell comprising:
- a) a casing;
- b) a negative electrode of an anode material that intercalates and deintercalates with an alkali metal and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to at least one of the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to at least one of the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm;
- d) an electrolyte solution activating the negative and positive electrodes housed inside the casing;
- and
- e) wherein the first cell is rechargeable by the second cell.
3 more elements
A method for providing an electrochemical cell, comprising the steps of:
- a) providing a casing;
- b) providing a negative electrode comprising an anode material that intercalates and deintercalates with an alkali metal and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein the anode material contacted to at least one of the first and second major sides is about 0.07 mm thick, or less;
- c) providing a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein the cathode active material contacted to at least one of the third and fourth major sides is about 0.0625 mm thick, or less;
- and
- d) activating the negative electrode and the positive electrode housed inside the casing with an electrolyte.
2 more elements
An electrochemical cell, which comprises:
- a) a casing;
- b) a negative electrode of an anode material that intercalates and deintercalates with an alkali metal contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to both the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to both the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm, and wherein a ratio of the surface area of the cathode active material contacted to the cathode current collector to the external casing volume is greater than 25 cm−1;
- and
- d) an electrolyte solution activating the negative and positive electrodes housed inside the casing.
2 more elements
An electrochemical cell, which comprises:
- a) a negative electrode of a carbonaceous material that intercalates and deintercalates with lithium contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to both the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- b) a positive electrode comprising lithium cobalt oxide contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to both the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm;
- c) an electrolyte activating the negative electrode and the positive electrode;
- and
- d) a casing housing the activated negative and positive electrodes, wherein a ratio of the surface area of the lithium cobalt oxide contacted to the cathode current collector to the external casing volume is greater than 25 cm−1.
2 more elements
In combination with an implantable medical device requiring at least one current pulse for a medical device operating function, a first electrochemical cell which is dischargeable to deliver the current pulse electrically coupled to a second electrochemical cell, the first cell comprising:
- a) a casing;
- b) a negative electrode of an anode material that intercalates and deintercalates with an alkali metal contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to both the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to both the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm, and wherein a ratio of the surface area of the cathode active material contacted to the cathode current collector to the external casing volume is greater than 25 cm−1;
- d) an electrolyte activating the negative and positive electrodes housed inside the casing;
- and
- e) wherein the first cell is rechargeable by the second cell.
3 more elements
A method for providing an electrochemical cell, comprising the steps of:
- a) providing a casing;
- b) providing a negative electrode comprising an anode material that intercalates and deintercalates with an alkali metal contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to both the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) providing a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to both the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, lees than about 0.15 mm, and wherein a ratio of the surface area of the cathode active material contacted to the cathode current collector to the external casing volume is greater than 25 cm−1;
- and
- d) activating the negative electrode and the positive electrode housed inside the casing with an electrolyte.
2 more elements
An electrochemical cell, which comprises:
- a) a casing;
- b) a negative electrode of an anode material that intercalates and deintercalates with an alkali metal and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to at least one of the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to at least one of the third and fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm;
- and
- d) an electrolyte solution activating the negative and positive electrodes housed inside the casing, wherein the electrolyte comprises ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate.
2 more elements
A method for providing an electrochemical cell, comprising the steps of:
- a) providing a casing;
- b) providing a negative electrode comprising an anode material that intercalates and deintercalates with an alkali metal and that is contacted to an anode current collector comprised of first and second spaced apart major sides, wherein with the anode material contacted to at least one of the first and second major sides, the negative electrode has a total thickness, including the anode current collector, less than about 0.15 mm;
- c) providing a positive electrode comprising a cathode active material that intercalates and deintercalates with the alkali metal and that is contacted to a cathode current collector comprised of third and fourth spaced apart major sides, wherein with the cathode active material contacted to at least one of the third arid fourth major sides, the positive electrode has a total thickness, including the cathode current collector, less than about 0.15 mm;
- and
- d) activating the negative electrode and the positive electrode housed inside the casing with an electrolyte comprising ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate.
2 more elements
Dependencies are inferred from the claim text.