Electrode assembly, manufacturing method thereof, and cylindrical secondary battery including the same
AssigneeSK On Co., Ltd.
InventorYoo Jung HUR
Life of this patent
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Abstract
An electrode assembly includes a positive electrode, a negative electrode, and a separator interposed therebetween in a thickness direction and wound in a length direction with respect to a winding center, wherein the positive electrode includes a positive electrode uncoated portion protruding at one width-directional end portion, the electrode assembly includes a first adhesive layer and a second adhesive layer at one width-directional end portion, the first adhesive layer is disposed between the positive electrode uncoated portion and the separator, and the second adhesive layer is disposed between one width-directional end portion of the negative electrode and the separator.
Claims13
An electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween in a thickness direction and wound in a length direction with respect to a winding center, wherein
- the positive electrode includes a positive electrode uncoated portion protruding at one width-directional end portion,
- the electrode assembly includes a first adhesive layer and a second adhesive layer at one width-directional end portion,
- the first adhesive layer is disposed between the positive electrode uncoated portion and the separator, and
- the second adhesive layer is disposed between one width-directional end portion of the negative electrode and the separator.
A method of manufacturing an electrode assembly, the method comprising:
- assembling a positive electrode, a negative electrode, and a separator interposed therebetween in a thickness direction to form an electrode assembly;
- applying a heat-fusible binder to one width-directional end portion of the electrode assembly;
- winding the electrode assembly, to which the heat-fusible binder has been applied, in the length direction with respect to a winding center;
- and
- heating the heat-fusible binder to form a first adhesive layer and a second adhesive layer at one width-directional end portion of the electrode assembly,
- wherein the positive electrode includes a positive electrode uncoated portion protruding from one width-directional end portion,
- the first adhesive layer is disposed between the positive electrode uncoated portion and the separator, and
- the second adhesive layer is disposed between one width-directional end portion of the negative electrode and the separator.
Dependencies are inferred from the claim text.