IP Library › Granted Patent US 12676391
Granted Patent B2
US 12676391 · App. 17/776,064 · Granted Jul 7, 2026

Electrode assembly, secondary battery and method for manufacturing the same

Inventors: Woo Yong Lee (Daejeon, KR); Dong Myung Kim (Daejeon, KR); Kyoung Won Kang (Daejeon, KR)
Assignee: LG Energy Solution, Ltd.
H01M50/572H01M4/62H01M10/0413H01M10/4235H01M50/172H01M50/531H01M50/533H01M50/54H01M4/0404H01M50/557H01M2200/20
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12676391
App. No.
17/776,064
Granted
Jul 7, 2026
Kind
B2
Abstract

The present disclosure relates to an electrode assembly. The electrode assembly can include a coating portion coated with an electrode active material and an electrode provided with an electrode tab without the electrode active material. The electrode can include a crack spreading prevention part, The crack spreading prevention part can include a crack spreading prevention hole formed in the electrode and an insulating coating layer provided on a circumferential surface of the crack spreading prevention hole.

Claims (13)

1 . An electrode assembly comprising:

a coating portion coated with an electrode active material, and

an electrode with an electrode tab, the electrode tab not including the electrode active material,

wherein the electrode comprises a crack spreading prevention part, the crack spreading prevention part comprising:

a crack spreading prevention hole formed in the electrode, and

an insulating coating layer provided entirely around a circumferential surface of the crack spreading prevention hole, the insulating coating layer including an outer coating portion provided on top and bottom surfaces of the crack spreading prevention hole, the outer coating portion disposed-above the coating portion and overlapping the coating portion.

2 . The electrode assembly of claim 1 , wherein the crack spreading prevention hole is formed in an interface between the coating portion and the electrode tab.

3 . The electrode assembly of claim 1 , wherein the insulating coating layer including an inner coating portion provided on an inner circumferential surface of the crack spreading prevention hole, the outer coating portion being connected to the inner coating portion.

4 . The electrode assembly of claim 3 , wherein an outer surface of the outer coating portion has a gear shape defined by alternatively provided grooves and protrusions.

5 . The electrode assembly of claim 3 , wherein the insulating coating layer has a thickness of 10 μm to 15 μm, a thickness of the outer coating portion being greater than a thickness of the inner coating portion.

6 . The electrode assembly of claim 1 , further including an interface between the coating portion and the electrode tab, the interface including a first end and an opposite second end, a round portion being formed at each of the first and second ends, the crack spreading prevention hole being disposed at a distance of 2.0 mm to 5.0 mm from at least one of the round portions.

7 . The electrode assembly of claim 1 , wherein the crack spreading prevention part further comprises a reinforcing coating layer disposed on an interface between the coating portion and the electrode tab, the reinforcing coating layer contacting the insulating coating layer.

8 . The electrode assembly of claim 1 , wherein the crack spreading prevention hole has a circular or elliptical shape with a diameter of 0.5 mm to 2.0 mm.