Electrode assembly and manufacturing method therefor
AssigneeNEC Corporation
InventorMakihiro OTOHATA
Life of this patent
Estimating the term…
Abstract
A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention is covered with an insulating layer. The cathode 11 and the anode 12 are oriented such that the burr 11b of the cathode 11 and the burr 12b of the anode 12 of the opposing cathode 11 and the opposing anode 12 close to at least the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 do not face each other 12 are opposed to each other.
Claims11
An electrode assembly for a battery, including:
- at least one cathode including a cathode current collector and a cathode active material layer formed in a predetermined area on at least one side of the cathode current collector, having a burr formed by a punching process, and formed in a predetermined shape;
- and
- at least one anode positioned facing the cathode, including an anode current collector and an anode active material layer formed in a predetermined area on at least one side of the anode current collector, having a burr formed by a punching process, and formed in a predetermined shape,
- wherein
- at least one of the cathode and the anode further includes an insulation layer that is formed covering the active material layer, and
- at a section of the facing cathode and anode where at least a peripheral edge of the cathode and a peripheral edge of the anode are adjacent, the cathode and the anode are facingly positioned in an orientation such that the burr of the cathode and the burr of the anode do not face one another.
A method of manufacturing an electrode assembly for a battery, including:
- a process of preparing a cathode including a cathode current collector and a cathode active material layer formed in a predetermined area on at least one side of the cathode current collector;
- and
- a process of preparing an anode including an anode current collector and an anode active material layer formed in a predetermined area on at least one side of the anode current collector,
- wherein
- at least one of the cathode and the anode further includes an insulation layer that is formed covering the active material layer, and further including:
- a process of forming the cathode in a predetermined shape by punching;
- a process of forming the anode in a predetermined shape by punching;
- and,
- a process of facingly positioning, at a section of the facing cathode and anode where at least a peripheral edge of the cathode and a peripheral edge of the anode are adjacent, the cathode and the anode in an orientation such that burrs created by the cutting do not face one another.
Dependencies are inferred from the claim text.