Reference point marking device and roll map generation device

A roll map generation apparatus comprising:

• a position measuring device configured to obtain coordinate data, the coordinate data indicating a position of a multi-lane electrode in a longitudinal direction according to an amount of rotation of an unwinder or a rewinder when the multi-lane electrode is moved in a roll-to-roll state between the unwinder and the rewinder, and
• a marking machine configured to mark reference points on the multi-lane electrode at predetermined intervals in the longitudinal direction of the multi-lane electrode in connection with the position measuring device;
• and
• a roll map generator configured to obtain roll map coordinate data of a position of the multi-lane electrode in the longitudinal direction and the reference points in connection with the position measuring device and the marking machine, and generate a roll map by displaying the roll map coordinate data on the roll map that simulates an electrode moving in a roll-to-roll state,
• wherein the marking machine comprises:
• a first marking machine configured to mark reference points on an uncoated portion of an electrode lane on one end of the multi-lane electrode or uncoated portions of electrode lanes on both ends of the multi-lane electrode in a width direction;
• and a second marking machine configured to mark reference points on uncoated portions of electrode lanes excluding the electrode lane on the one end or uncoated portions of electrode lanes excluding the electrode lanes on the both ends of the multi-lane electrode while moving in the width direction, and
• the roll map generator generates a roll map of the multi-lane electrode and a roll map of each electrode lane of the multi-lane electrode, based on the roll map coordinate data of the reference points marked by the first and second marking machines.

A roll map of a multi-lane electrode on which coated portions coated with an active material and uncoated portions that are not coated with the active material are repeatedly arranged in a width direction, the roll map comprising at least one of:

• 1) coordinate data about a position of the multi-lane electrode in a longitudinal direction of the multi-lane electrode;
• 2) a plurality of reference points marked on uncoated portions of electrode lanes at predetermined intervals in the longitudinal direction of the multi-lane electrode;
• 3) reference point coordinate data of the reference points;
• and
• 4) a defect marking for a defective point and/or a defective section on the multi-lane electrode, and defect coordinate data of the defect marking.