Coiled capacitor

• US 9,941,051 B2
• Filed: 06/26/2015
• Issued: 04/10/2018
• Est. Priority Date: 06/26/2015
• Status: Active Grant

• Current Assignee: Capactor Sciences Incorporated
• Original Assignee: Capactor Sciences Incorporated
• Inventors: Robinson, Matthew R., Furuta, Paul, Lazarev, Pavel Ivan
• Primary Examiner(s): THOMAS, ERIC W
• Application Number:
  US14/752,600
• Publication Number:
  US 20160379757A1
• Time in Patent Office: 1,019 Days
• Field of Search: 361273, 361323, 3613015
• CPC Class Codes: H01G 4/012 Form of non-self-supporting electrodes
• CPC Class Codes: H01G 4/015 Special provisions for self-healing
• CPC Class Codes: H01G 4/18 of synthetic material, e.g. derivatives of cellulose H01G4/16 takes precedence
• CPC Class Codes: H01G 4/228 Terminals
• CPC Class Codes: H01G 4/232 electrically connecting two or more layers of a stacked or rolled capacitor
• CPC Class Codes: H01G 4/32 Wound capacitors
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The present disclosure provides a coiled capacitor comprising a coil formed by a flexible multilayered tape, and a first terminating electrode (a first contact layer) and a second terminating electrode (a second contact layer) which are located on butts of the coil. The flexible multilayered tape contains the following sequence of layers: first metal layer, a layer of a plastic, second metal layer, a layer of energy storage material. The first metal layer forms ohmic contact with the first terminating electrode (the first contact layer) and the second metal layer (the second contact layer) forms ohmic contact with the second terminating electrode.

Claims

1. A coiled capacitor comprising

a coil formed by a flexible multilayered tape, and

a first terminating electrode (a first contact layer) and a second terminating electrode (a second contact layer) which are located on butts of the coil,

wherein the flexible multilayered tape contains the following sequence of layers:

first metal layer, a layer of a plastic, second metal layer, a layer of energy storage material, and

wherein the first metal layer forms ohmic contact with the first terminating electrode (the first contact layer) and the second metal layer (the second contact layer) forms ohmic contact with the second terminating electrode

wherein the energy storage material includes one or more structures selected from the list comprising structures 22 to 27;

2. A coiled capacitor according to claim 1, further comprises a dielectric core around which the flexible multilayered tape is coiled.

3. A coiled capacitor according to claim 1, wherein the energy storage material comprises a polymeric material soluble in organic solvents.

4. A coiled capacitor according to claim 1, wherein the energy storage material comprises ceramic slurries, sputtered thin films, or molecularly ordered crystals.

5. A coiled capacitor according to claim 1, wherein the plastic is selected from the list comprising polypropylene (PP), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyethylene naphthalate (PEN), polycarbonate (PP), polystyrene (PS), and polytetrafluoroethylene (PTFE).

6. A coiled capacitor according to claim 5, wherein the thickness of the plastic layer varies from 2.5 μ

m to 52 μ

m.

7. A coiled capacitor according to claim 1, wherein the thickness of the plastic layer cannot be less than 2 μ

m.

8. A coiled capacitor according to claim 1, wherein the plastic layer comprises polypropylene and the thickness of the plastic layer is equal to 12 μ

m.

9. A coiled capacitor according to claim 1, wherein the plastic layer comprises polyethylene terephthalate (PET) and the thickness of the plastic layer is equal to 12 μ

m.

10. A coiled capacitor according to claim 1, wherein the material of the first metal layer and second metal layer independently selected from the list comprising Pt, Cu, Al, Ag, Au, Ni, Al:

Ni and the metal foam.

11. A coiled capacitor according to claim 10, wherein the first or second metal layer is a metal foam and the metal of the metal foam is selected from the list comprising Aluminum (Al), Nickel (Ni), Iron (Fe), and Copper (Cu).

12. A coiled capacitor according to claim 10, wherein the first or second metal layer is a metal foam and a melting temperature of the metal foam is in the range 400 C.-700 C.

13. A coiled capacitor according to claim 10, wherein the first or second metal layer is a metal foam and metal content in the metal foam for electrode is in the range of 5% up to 30% by weight.

14. A coiled capacitor according to claim 10, wherein the first or second metal layer is a metal foam and the metal foam is of closed “

bubble”

type with maximum conductance per metal content.

15. A coiled capacitor according to claim 10, wherein the first or second metal layer is a metal foam and the size of “

bubbles”

in the metal foam is in a range from 100 nm to 100,000 nm.

16. A coiled capacitor according to claim 1, wherein the thickness of the first and second contact layers independently varies from 10 nm to 1000 nm.

17. A coiled capacitor according to claim 1, wherein the sheet resistance of the first and second contact layers independently cannot be less than 0.1 Ohm/Square.

18. A coiled capacitor according to claim 17, wherein the sheet resistance of the first and second contact layers independently varies from 0.1 Ohm/Square to 2.5 Ohm/Square.

19. A coiled capacitor according to claim 1, wherein the material of the first terminating electrode and second terminating electrode are independently selected from the list comprising Platinum (Pt), Copper (Cu), Aluminum (Al), Silver (Ag), and Gold (Au).

20. A coiled capacitor according to claim 1, wherein the first metal layer is deposited on a portion of a first surface of the plastic layer and the first surface has a first margin portion which is free of deposited metal, and wherein the second metal layer is deposited on a portion of a second surface of the plastic layer and this second surface has a second margin portion which is free of deposited metal and is located on an opposite edge of the plastic layer from the first margin portion.