CURRENT COLLECTOR

• US 20070178383A1
• Filed: 04/26/2006
• Published: 08/02/2007
• Est. Priority Date: 01/31/2006
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Zhao, Hailiang, Viavattine, Joseph
• Application Number:
  US11/380,250
• Publication Number:
  US 20070178383A1
• Time in Patent Office: Days
• US Class Current: 429/241
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 4/66 Selection of materials
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/70 characterised by shape or form
• CPC Class Codes: H01M 4/80 Porous plates, e.g. sintered carriers
• CPC Class Codes: H01M 50/176 for prismatic or rectangular cells H01M50/181 takes precedence
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 428/12493 Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]

Abstract

A current collector for a battery in an implantable medical device is presented. The current collector comprises a layer which includes a first surface and a second surface. For a cathode electrode plate, the layer possesses a lower resistivity of less than or about 2.7 Ohm meters (Ω)×10⁸. For an anode electrode plate, the layer possesses a resistivity of about 2.5 Ω×10⁸ to about 7 Ωm×10⁸.

Claims

1. A cathode current collector for a plate battery in an implantable medical device comprising:

a layer which includes a first surface and a second surface, the layer possesses a lower resistivity of less than or about 2.7 Ohm meters(Ω

m)×

10⁸; and

a set of apertures extend from the first surface to the second surface of the layer.

2. The cathode current collector of claim 1, wherein the layer possesses a thermal conductivity of about 235 Watts/meter Kelvin (W/mK).

3. The cathode current collector of claim 1, wherein the layer consists essentially of aluminum.

4. The cathode current collector of claim 1, wherein the layer reduces a size of the battery by about 5 percent (%).

7. The current collector of claim 1, wherein the layer comprises one of copper and nickel.

8. The current collector of claim 1, wherein the layer reduces a volumetric size of the battery by about 10%.

5. An anode current collector for a flat plate battery in an implantable medical device comprising:

a layer which includes a first surface and a second surface, wherein the layer possesses a resistivity of about 2.5 Ω

m×

10⁸ to about 7 Ω

m×

10⁸; and

a set of apertures extend from the first surface to the second surface of the layer.

6. The current collector of claim 5, wherein the layer possesses a thermal conductivity of about 91 W/mK to about 400 W/mK.

9. A plate battery in an implantable medical device comprising:

(a) an anode that includes a set of anode electrode plates with a set of tabs extending therefrom, the anode comprises;

a set of anode current collectors, each anode current collector comprises one of copper and nickel and includes a first set of apertures that extend from the first surface to the second surface of the anode current collector, each anode current collector covered with an anodic material;

(b) a cathode that includes a set of cathode electrode plates with a set of tabs extending therefrom, the cathode comprises;

a set of cathode current collectors, each cathode current collector comprises aluminum and includes a second set of apertures that extend from the first surface to the second surface of the cathode current collector, each cathode current collector covered with a cathodic material;

(c) a set of separators disposed between each anode electrode plate and cathode electrode plate; and

an electrolyte disposed over the anode and the cathode.

10. The plate battery of claim 9, further comprising:

a set of anode tabs extending from the set of anode collectors; and

a conductive coupling member coupled to the set of anode tabs and to a case of the battery.

11. The plate battery of claim 10, the coupling member comprising one of titanium, and nickel/titanium.

12. The plate battery of claim 10, wherein the coupling member being a wrap.

13. The plate battery of claim 10, wherein the coupling member being a vanadium jumper.

14. The plate battery of claim 10, wherein the coupling member comprising one of clad material, and vanadium.

15. The plate battery of claim 14, wherein the clad material being selected based upon at least one welding property associated with a case of the battery.

16. The plate battery of claim 15, wherein the clad material being selected based upon at least one welding property associated with the set of anode tabs.

17. The plate battery of claim 14, wherein the clad material being nickel/titanium clad metal.

18. The plate battery of claim 14, wherein the clad material comprising a first metal being at least one of aluminum, copper, nickel, and titanium.

19. The plate battery of claim 18, wherein the clad material comprising a second metal being different from the first metal, the second metal being at least one of aluminum, copper, nickel, and titanium.

20. A method of forming a current collector for a plate battery in an implantable medical device comprising:

providing a layer of copper; and

forming a set of apertures in the copper layer.