Metal interconnect for capacitor

1 . A capacitor, comprising:

a cover;

an electrode; and

a bent and electrically conductive metal, wherein the metal is coupled to the cover and the electrode.

2 . The capacitor of claim 1 , wherein the metal is springable.

3 . The capacitor of claim 2 , wherein the metal is bent at least twice.

4 . The capacitor of claim 1 , wherein the metal comprises a void.

5 . The capacitor of claim 1 , wherein the metal comprises sufficient cross-sectional area to pass 1500 amps of current between the electrode and the cover.

6 . The capacitor of claim 1 , wherein the metal is joined to the cover at the central portion.

7 . The capacitor of claim 6 , wherein the metal is joined to the electrode.

8 . The capacitor of claim 7 , wherein the electrode comprises a centrally disposed axis, wherein the metal comprises a void, and wherein the void and the axis are generally aligned with each other.

9 . The capacitor of claim 7 , wherein the device comprises a housing, wherein the electrode is disposed within the housing, wherein the cover is joined to the housing, and wherein the metal exerts a springable force against the electrode.

10 . The capacitor of claim 9 , wherein the metal is joined to electrode by a laser weld.

11 . The capacitor of claim 10 , wherein the metal is joined to the cover by a spot weld.

12 . The capacitor of claim 11 , wherein the cover is coated with an insulator and/or a sealant.

13 . The capacitor of claim 5 , wherein the metal comprises aluminum.

14 . A method of making an energy storage device, comprising:

providing a cover;

providing a metal capable of passing 01500 amps of current between the cover and the metal;

bending the metal; and

joining the metal to the cover.

15 . The method of claim 14 , wherein the metal is bent at least twice.

16 . The method of claim 15 , further comprising a step of providing an electrode, wherein the metal is joined to the electrode.

17 . The method of claim 16 , wherein the metal exerts a springable force between the cover and the electrode.

18 . The method of claim 17 , wherein the electrode comprises a rolled electrode.

19 . A double-layer capacitor, comprising:

a cover;

a rolled electrode; and

an electrically conductive aluminum metal, wherein the metal includes two bent portions, wherein the metal is coupled to the cover and the electrode, wherein the metal is capable of passing at least 1500 amps of current between the electrode and the cover.

20 . The capacitor of claim 19 , wherein the between the cover and the electrode the metal exerts a springable force