Manufacturing method for an electrode for a battery
View Patent ↗This invention relates to a method of manufacturing an electrode for a secondary battery, which enables cost savings and the manufacture of products having various sizes and shapes. The method includes (A) preparing an electrode plate, (B) cutting the electrode plate to conform to the width of the electrode, thus providing a unit electrode plate, and (C) removing at least one of the corner regions of the unit electrode plate.
1. A method of manufacturing an electrode for a battery, comprising steps of:
(A) preparing an initial electrode plate comprising the steps of:
(A1) preparing a preliminary electrode plate which includes an axis and blank regions, at opposite sides of said axis, on which no active material is applied, and
(A2) slitting the preliminary electrode plate in an axial direction, thus producing the initial electrode plate having a blank region on one side thereof;
(B) cutting the initial electrode plate in a scissors manner to conform with a width of the electrode, thus providing a unit electrode plate in which the blank region has corner regions; and
(C) removing first and second corner regions on the unit electrode plate positioned at opposite sides of the blank region, on which no active material is applied;
wherein the step (C) of removing the first and the second corner regions is conducted in such a way as to remove the first and the second corner regions sequentially, wherein the step (B) of cutting the initial electrode plate and the step (C) of removing the first and the second corner regions are conducted in a continuous process;
wherein the step (C) of removing the first and second corner regions comprises the steps of:
positioning a cutting tool and said unit electrode plate relative to one another so that said cutting tool is positioned over said first corner region;
removing the first corner region of the unit electrode plate using said cutting tool;
repositioning said unit electrode plate or said cutting tool so that said cutting tool is positioned over the second corner region; and
removing the second corner region of the unit electrode plate using said cutting tool.
2. The method according to claim 1 , wherein the step (A2) of slitting the preliminary electrode plate is conducted in such a way as to slit the preliminary electrode plate along a center line with respect to a width of the preliminary electrode plate.
3. The method according to claim 1 , wherein the step (C) of removing the first and the second corner regions of the unit electrode plate is conducted using a cutting tool having a shape corresponding to a shape of the corner region to be removed in a predetermined pattern.
4. The method according to claim 1 , wherein the battery is a lithium secondary battery and the electrode is adapted to be used in the lithium secondary battery.