Roll press apparatus for manufacturing electrode plates

Abstract

A roll press apparatus for manufacturing electrode plates includes a frame, a first pressure roller rotatably supported by the frame part and configured to apply pressure to a first surface of an electrode plate, a first electromagnet provided in the first pressure roller, a second pressure roller rotatably supported by the frame and configured to apply pressure to a second surface of the electrode plate, and a second electromagnet provided in the second pressure roller. A driver is configured to provide a rotational driving force to the first pressure roller and the second pressure roller. A distance sensor is configured to sense a distance between the first pressure roller and the second pressure roller. A controller is configured to receive a signal from the distance sensor and vary a strength of magnetic force from the first electromagnet and the second electromagnet so that the distance between the first pressure roller and the second pressure roller is maintained.

What is claimed is: 
     
         1 . A roll press apparatus for manufacturing electrode plates, the roll press apparatus comprising:
 a frame;   a first pressure roller rotatably supported by the frame and configured to apply pressure to a first surface of an electrode plate;   a first electromagnet provided in the first pressure roller;   a second pressure roller rotatably supported by the frame and configured to apply pressure to a second surface of the electrode plate;   a second electromagnet provided in the second pressure roller;   a driver configured to provide a rotational driving force to the first pressure roller and the second pressure roller;   a distance sensor configured to sense a distance between the first pressure roller and the second pressure roller; and   a controller configured to receive a signal from the distance sensor and vary a strength of magnetic force from the first electromagnet and the second electromagnet so that the distance between the first pressure roller and the second pressure roller is maintained.   
     
     
         2 . The roll press apparatus as claimed in  claim 1 , wherein the first pressure roller is configured to be disposed in the width direction of the first surface of the electrode plate, and
 wherein the first electromagnet is provided in a hole formed in the first pressure roller.   
     
     
         3 . The roll press apparatus as claimed in  claim 2 , wherein the second pressure roller is configured to be disposed in the width direction on the second surface of the electrode plate, and the second electromagnet is provided in a hole formed in the first pressure roller. 
     
     
         4 . The roll press apparatus as claimed in  claim 3 , wherein the second electromagnet is a cylindrically shaped. 
     
     
         5 . The roll press apparatus as claimed in  claim 1 , wherein the first pressure roller is configured to be disposed in the width direction of the first surface of the electrode plate, and
 wherein the first electromagnet is provided on an outer surface of the first electromagnet.   
     
     
         6 . The roll press apparatus as claimed in  claim 5 , wherein the first electromagnet is ring shaped. 
     
     
         7 . The roll press apparatus as claimed in  claim 6 , wherein a plurality of first electromagnets are provided on the outer surface of the first pressure roller. 
     
     
         8 . The roll press apparatus as claimed in  claim 7 , wherein the second pressure roller is configured to be disposed in the width direction of the second surface of the electrode plate, and the second electromagnet is provided on an outer surface of the second pressure roller. 
     
     
         9 . The roll press apparatus as claimed in  claim 8 , wherein the second electromagnet is a ring shaped. 
     
     
         10 . The roll press apparatus as claimed in  claim 9 , wherein a plurality of second electromagnets are provided on the outer surface of the second pressure roller. 
     
     
         11 . The roll press apparatus as claimed in  claim 1 , wherein the first pressure roller is configured to be disposed in the width direction of the first surface of the electrode plate, and
 wherein a plurality first electromagnets are positioned in holes formed in the first pressure roller.   
     
     
         12 . The roll press apparatus as claimed in  claim 11 , wherein the holes in the first pressure roller are formed at radial positions around a center of the first pressure roller. 
     
     
         13 . The roll press apparatus as claimed in  claim 12 , wherein the second pressure roller is configured to be disposed in the width direction of the second surface of the electrode plate, and
 wherein a plurality of second electromagnets are positioned in holes formed in the second pressure roller.   
     
     
         14 . The roll press apparatus as claimed in  claim 13 , wherein the holes in the second pressure roller are formed at radial positions around a center of the second pressure roller. 
     
     
         15 . The roll press apparatus as claimed in  claim 1 , wherein the first electromagnet and the second electromagnet are coil shaped and provided on outer surfaces of the first pressure roller and the second pressure roller, respectively. 
     
     
         16 . The roll press apparatus as claimed in  claim 11 , wherein the driver comprises:
 a driving motor providing the rotational driving force; and   a belt member connected to a shaft of the driving motor and the first and second pressure rollers to transmit the rotational driving force form the driving motor to the first and second pressure rollers.