Method of manufacturing electrode including folding portion and electrode sheet including folding portion

1 . An electrode manufacturing method comprising:

coating an electrode mixture coated portion on an electrode sheet, leaving an uncoated portion of the electrode sheet having no electrode mixture formed thereon;

slitting the electrode sheet into a plurality of unit electrode sheets along a slitting line; and

then notching the electrode sheet along a notching line,

wherein the uncoated portion comprises:

first and second electrode tab formation portions; and

first and second folding portions each extending parallel to a direction in which the slitting line extends,

wherein the slitting line is formed on the electrode mixture coated portion and is located between the first and second folding portions at a location that divides the electrode mixture coated portion into two equal parts,

wherein the notching line is a straight line passing through the electrode mixture coated portion and one of the first folding portion or the second folding portion, the notching line extending perpendicular to the slitting line.

2 . The electrode manufacturing method according to claim 1 , wherein the coated portion is continuously formed and extends parallel to the direction in which the slitting line extends.

3 . The electrode manufacturing method according to claim 1 , wherein the slitting includes slitting part of the coated portion located between the first and second folding portions.

4 . The electrode manufacturing method according to claim 1 , wherein a width of the electrode tab formation portion and a width of the first and second folding portions are different from each other.

5 . The electrode manufacturing method according to claim 1 , wherein the notching comprises:

forming an electrode tab at the electrode tab formation portion; and

notching each unit electrode sheet along a notching line to divide the unit electrode sheet into a plurality of unit electrodes.

6 . The electrode manufacturing method according to claim 5 , wherein the forming of the electrode tab and the notching of each unit electrode sheet along the notching line are simultaneously performed.

7 . The electrode manufacturing method according to claim 1 , wherein the electrode tab formation portion includes first, second, and third electrode tab formation areas formed at each of first and second opposite side ends of the electrode sheet and a third middle portion of the electrode sheet, respectively.

8 . The electrode manufacturing method according to claim 7 , wherein the plurality of unit electrode sheets include first and second subsets of unit electrode sheets having two different widths.

9 . An electrode manufactured using the electrode manufacturing method according to claim 1 , wherein the electrode is configured to be bendable at the first folding portion.

10 . The electrode according to claim 9 , wherein a first part of the electrode mixture coated portion and a second part of the electrode mixture coated portion are formed on opposite sides of the first folding portion, and

wherein the first part of the electrode mixture coated portion and the second part of the electrode mixture coat ed portion have an identical size.

11 . The electrode according to claim 10 , wherein a width of the first folding portion is greater than a thickness of the electrode mixture coated portion x Π.

12 . A battery cell comprising an electrode manufactured using the electrode manufacturing method according to claim 1 , wherein the battery cell is configured to be bendable at the first folding portion of the electrode.