Method for producing electrode

A method for producing an electrode, comprising:

• rolling an electrode material between a rotating first roll and a rotating second roll to form a mixture coated film;
• attaching the mixture coated film to the second roll and transporting the mixture coated film;
• guiding a long belt-shaped electrode current collector by a rotating third roll and transporting the electrode current collector;
• and
• passing the mixture coated film and the electrode current collector between the second roll and the third roll to compressedly bond the mixture coated film to a surface of the electrode current collector;
• the method further comprising:
• detecting a film thicknesses TB1 of a left side of the mixture coated film between a surface position of a left side edge of the mixture coated film detected by a first sensor of the left side and a surface position of the left side edge of the second roll detected by a second sensor of the left side;
• detecting a film thicknesses TB2 of a right side of the mixture coated film between a surface position of a right side edge of the mixture coated film detected by a first sensor of the right side and a surface position of the right side edge of the second roll detected by a second sensor of the right side;
• determining an average film thickness TB of the mixture coated film by calculating (TB1+TB2)/2;
• and
• adjusting a ratio of a rotation speed of the third roll relative to a rotation speed of the second roll based on the average film thickness TB of the mixture coated film, wherein
• a detection position of the first sensor of the left side and the first sensor of the right side and a detection position of the second sensor of the left side and the second sensor of the right side in a circumferential direction of the second roll being maintained substantially identical.