Apparatus and method for coating electrode active material slurry

A method of coating electrode active material slurry such that the active material slurry is coated, by using a coating die, on a coating area of an electrode current collector continuously transferred in a predetermined process direction, the method comprising:

• (a) a coating start process in which, while the coating die stands by at a predetermined coating start position, when a balcony region of the coating area, on which coating of the active material slurry begins, reaches the coating start position, the coating die coats the active material slurry on the balcony region while moving from the coating start position to a main coating position that is spaced apart from the coating start position by a predetermined distance in an opposite direction to the process direction, such that the coating die coats the active material slurry on the balcony region while the electrode current collector moves at a first relative speed with respect to the coating die;
• and
• (b) a main coating process in which, when the coating die reaches the main coating position, the coating die coats the active material slurry on a main coating region of the coating area while stopped, such that the coating die coats the active material slurry on the main coating region while the electrode current collector moves at a second relative speed with respect to the coating die, wherein the main coating region is located between the balcony region and a drag region of the coating area, on which coating of the active material slurry is terminated;
• wherein the first relative speed is larger than the second relative speed.

A method of coating electrode active material slurry such that the active material slurry is coated, by using a coating die, on a coating area of an electrode current collector continuously transferred in a predetermined process direction, the method comprising:

• (a) a main coating process in which, when the coating die reaches the main coating position, the coating die coats the active material slurry on a main coating region of the coating area while stopped, such that the coating die coats the active material slurry on the main coating region while the electrode current collector moves at a first relative speed with respect to the coating die, wherein the main coating region is located between the balcony region and a drag region of the coating area, on which coating of the active material slurry is terminated;
• and
• (b) a coating end process in which, when the drag region reaches the main coating position, the coating die coats the active material slurry on the drag region while moving from the main coating position to a coating end position that is spaced apart from the main coating position by a predetermined distance in the process direction, such that the coating die coats the active material slurry on the drag region while the electrode current collector moves at a second relative speed with respect to the coating die;
• wherein the first relative speed is larger than the second relative speed.