The present disclosure provides an electrode for a secondary battery capable of measuring the width of a first mixture layer and the width of a second mixture layer when the first mixture layer and the second mixture layer are stacked and formed on the surface of a metal foil. A positive electrode body (electrode for a secondary battery) includes a strip-like positive electrode foil and a positive electrode mixture layer provided on the positive electrode foil. The positive electrode mixture layer includes a first positive electrode mixture layer provided on the positive electrode foil and a second positive electrode mixture layer provided on the first positive electrode mixture layer. The first positive electrode mixture layer has a width greater than a width of the second positive electrode mixture layer.

The present disclosure provides an electrode for a secondary battery capable of measuring the width of a first mixture layer and the width of a second mixture layer when the first mixture layer and the second mixture layer are stacked and formed on the surface of a metal foil. A positive electrode body (electrode for a secondary battery) 301 includes a strip-like positive electrode foil 301a and a positive electrode mixture layer 301b provided on the positive electrode foil 301a. The positive electrode mixture layer 301b includes a first positive electrode mixture layer 311 provided on the positive electrode foil 301a and a second positive electrode mixture layer 312 provided on the first positive electrode mixture layer 311. The first positive electrode mixture layer 311 has a width greater than a width of the second positive electrode mixture layer 312.

Discussed is a a process automation system including: a cell transferor configured to transfer battery cells; a cell inspector configured to measure an open circuit voltage of each battery cell in units of a preset number of battery cells and to sort out qualified battery cells and defective battery cells; a frame transferor configured to transfer module frames of a battery module to insert the qualified battery cells; a cell discharger configured to load and discharge the defective battery cells; and a gripper configured to pick up one or more battery cells from any one device among the cell transferor, the cell inspector, the frame transferor, and the cell discharger, and transport the one or more battery cells to another device.

After stacking of stacked cell is finished, the control unit performs a cutting process including allowing a separator cutting unit to cut a separator between a separator holding unit and a table for stacking in a state where the separator holding unit holds a lower surface of the separator between a separator roller and the table for stacking, moving the separator holding unit from below the separator roller to one side, and allowing to pass the separator to an upper surface of the table for stacking that has moved to the one side after the completed stacked cell is removed.