Patent ID: 11973177
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A secondary battery comprising:
a can member; and
an electrode assembly having a positive electrode, a negative electrode and a separator disposed therebetween, which are wounded together in a jelly-roll shape,
wherein the positive electrode or the negative electrode comprises:
an electrode collector;
a coating portion coated with an active material on the electrode collector; and
a non-coating portion on which the active material is not applied to the electrode collector, the non-coating portion being adjacent to the coating portion in a longitudinal direction of the electrode collector; and
a notching tab part formed in the non-coating portion and extending from the coating portion in a width direction of the electrode collector perpendicular to the longitudinal direction, the notching tab part being wound to form two or more overlapping layers,

wherein the notching tab part comprises a plurality of notching tabs each formed from a respective portion of the two or more overlapping layers,
the plurality of notching tabs are circumferentially distributed about a central axis of the electrode assembly,
the plurality of notching tabs each having two or more layers are in a bent state to form an overlapping region therebetween in the width direction of the electrode collector, and
the plurality of notching tabs are bonded at the overlapping region and electrically connected to the can member.