Electrode assembly and button battery having the same
AssigneeSamsung SDI Co., Ltd.
InventorsCheolhyeon CHO, Yoonjeong KIM, Bomin HONG, Yoonbin KIM
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Abstract
An electrode assembly includes: a first electrode; a second electrode on the first electrode in a first direction; and a separator between the first electrode and the second electrode. The first electrode, the second electrode, and the separator are wound in a jelly roll shape about a winding axis extending in a second direction intersecting the first direction. The first electrode has a first front uncoated region adjacent to the winding axis in the first direction and extending around the winding axis by at least two turns.
Claims20
An electrode assembly comprising:
- a first electrode;
- a second electrode on the first electrode in a first direction;
- and
- a separator between the first electrode and the second electrode,
- wherein the first electrode, the second electrode, and the separator are wound in a jelly roll shape about a winding axis extending in a second direction intersecting the first direction, and
- wherein the first electrode has a first front uncoated region adjacent to the winding axis in the first direction and extending around the winding axis by at least two turns.
A button battery comprising:
- an electrode assembly comprising a first electrode, a second electrode, and a separator between the first electrode and the second electrode in a first direction, the first electrode, the second electrode, and the separator being wound in a jelly roll shape along a winding axis extending in a second direction intersecting the first direction;
- a case connected to the first electrode, accommodating the electrode assembly, and having an opening exposing the electrode assembly;
- a cap plate covering an outer region of the opening in the case and having an opening exposing a central region of the opening in the case;
- and
- a terminal plate insulated from the cap plate, connected to the second electrode, and covering the opening in the cap plate,
- wherein the first electrode has a first front uncoated region adjacent to the winding axis in the first direction and extending around the winding axis by at least two turns.
Dependencies are inferred from the claim text.