Granted Patent B2

US 12,278,326 · App. 18/752,240 · Granted Apr 15, 2025

Inventors: Jae Woong Kim (Daejeon, KR); Hyoung Kwon Kim (Daejeon, KR); Sang Uck Kim (Daejeon, KR)

Assignee: LG Energy Solution, Ltd.

H01M10/0422H01M10/0431H01M50/538H01M50/536

Abstract

Claims (20)

1. An electrode for a secondary battery comprising:

an electrode collector;

a coating portion having an active material coated on the electrode collector;

of the electrode collector, the first non-coating portion having a longitudinal dimension extending along the longitudinal direction of the electrode collector, the first non-coating portion configured to be bent and electrically coupled to a can member of the secondary battery; and

a second non-coating portion on which the active material is not applied to the electrode collector, the second non-coating portion being adjacent to the coating portion in the longitudinal direction.

2. The electrode of claim 1 , wherein the second non-coating portion is located at a longitudinal end of the electrode collector.

3. The electrode of claim 1 , wherein the first non-coating portion is spaced apart from the second non-coating portion.

4. The electrode of claim 3 , wherein the first non-coating portion is spaced apart from the second non-coating portion along the longitudinal direction of the electrode collector.

5. The electrode of claim 1 , wherein the electrode collector defines a first width in the width direction along the first non-coating portion in the longitudinal direction, and wherein the electrode collector defines a second width in the width direction along a segment of the electrode collector in the longitudinal direction that excludes the first non-coating portion, the first width being greater than the second width.

6. The electrode of claim 5 , wherein the segment of the electrode collector is a remainder of the electrode collector in the longitudinal direction that excludes the first non-coating portion.

7. The electrode of claim 5 , wherein the segment of the electrode collector extends along the second non-coating portion in the longitudinal direction.

8. The electrode of claim 1 , wherein the first non-coating portion continuously extends across ⅓ or more of a total length of the coating portion in the longitudinal direction.

9. The electrode of claim 1 , wherein the first non-coating portion continuously extends across at least two circumferential windings of the electrode collector in the longitudinal direction.

10. The electrode of claim 1 , wherein the first non-coating portion is configured to be attached to the can member of the secondary battery.

11. The electrode of claim 1 , further comprising an electrode tab attached to and extending from the second non-coating portion.

12. An electrode assembly, comprising:

the electrode of claim 1 stacked into a stack with a separator and a second electrode of an opposite polarity than the electrode, the separator being disposed between the electrode and the second electrode, and the stack being wound about an axis into a jelly-roll shape.

13. The electrode of claim 1 , wherein the first non-coating portion is configured such that an electric current in the first non-coating portion flows toward the can member in the width direction.

14. The electrode of claim 1 , wherein the first non-coating portion is formed from a metal foil of the electrode collector.

15. A cylindrical secondary battery comprising the electrode of claim 1 .

Priority Claims (2)

Continuity (5)

References Cited (75)