Roller-Press Apparatus

Abstract

The present disclosure provides a roller-press apparatus, which comprises: an unwinding mechanism around which an electrode plate to be rolled is wound, the electrode plate has a foil and a coating layer, the foil has at least a coated area and a blank foil area, the foil is provided with the coating layer at the coated area and is not provided with the coating layer at the blank foil area; a rolling mechanism; and a stretching mechanism. The stretching mechanism comprises: two guide rollers; and an uneven roller positioned between the two guide rollers, and forming a wrap angle with the two guide rollers, the uneven roller matches the electrode plate in size to allow a protruding portion of the uneven roller to act on the foil at the blank foil area, so as to allow the foil at the blank foil area to be plastically deformed.

What is claimed is: 
     
         1 . A roller-press apparatus, comprising:
 an unwinding mechanism ( 1 ) around which an electrode plate ( 9 ) to be rolled is wound, and the unwinding mechanism ( 1 ) unwinding the electrode plate ( 9 ) to be rolled, the electrode plate ( 9 ) to be rolled having a foil ( 91 ) and a coating layer ( 92 ) provided on at least a surface of the foil ( 91 ), the foil ( 91 ) having at least a coated area ( 911 ) extending along a longitudinal direction of the foil ( 91 ) and a blank foil area positioned at a side direction of the coated area ( 911 ) on the corresponding surface provided with the coating layer ( 92 ), the foil ( 91 ) being provided with the coating layer ( 92 ) at the coated area ( 911 ) and being not provided with the coating layer ( 92 ) at the blank foil area;   a rolling mechanism ( 2 ) comprising a press roller ( 21 ) and a back roller ( 22 ) which are oppositely provided, and used for rolling the electrode plate ( 9 );   a winding mechanism ( 3 ) winding the electrode plate ( 9 ) after rolled; and   a stretching mechanism ( 5 ) provided between the rolling mechanism ( 2 ) and the winding mechanism ( 3 ), and comprising:
 two guide rollers ( 51 ); and 
 an uneven roller ( 52 ) positioned between the two guide rollers ( 51 ), and forming a wrap angle (E) with the two guide rollers ( 51 ), the uneven roller ( 52 ) matching the electrode plate ( 9 ) in size to allow a protruding portion ( 521 ) of the uneven roller ( 52 ) to act on the foil ( 91 ) at the blank foil area, so as to allow the foil ( 91 ) at the blank foil area to be plastically deformed. 
   
     
     
         2 . The roller-press apparatus according to  claim 1 , wherein a recessing portion ( 522 ) of the uneven roller ( 52 ) contacts the coating layer ( 92 ) at the coated area ( 911 ) on the surface of the foil ( 91 ) provided with the coating layer ( 92 ) and facing the uneven roller ( 52 ), or contacts the foil ( 91 ) at an area on a surface of the foil ( 91 ) not provided with the coating layer ( 92 ) and facing the uneven roller ( 52 ) and corresponding to the coated area ( 911 ) on the surface of the foil ( 91 ) provided with the coating layer ( 92 ). 
     
     
         3 . The roller-press apparatus according to  claim 1 , wherein a diameter of the recessing portion ( 522 ) of the uneven roller ( 52 ) is A, a diameter of the protruding portion ( 521 ) is B, and B−A=0.1 mm˜0.5 mm. 
     
     
         4 . The roller-press apparatus according to  claim 1 , wherein a transition corner is between adjacent recessing portion ( 522 ) and protruding portion ( 521 ) on the same side, a width of the recessing portion ( 522 ) in an axial direction is C, a width between the outermost positions of corresponding transition corners of two adjacent protruding portions ( 521 ) is D, and D−C≦±1 mm. 
     
     
         5 . The roller-press apparatus according to  claim 4 , wherein D−C=0.03 mm˜0.80 mm. 
     
     
         6 . The roller-press apparatus according to  claim 1 , further comprising:
 a heating element ( 6 ) for heating the blank foil area of the foil ( 91 ) before the uneven roller ( 52 ) acts on the electrode plate ( 9 ).   
     
     
         7 . The roller-press apparatus according to  claim 1 , further comprising:
 a stretching roller pair ( 7 ) close to the winding mechanism ( 3 ) and comprising a stretching drive roller ( 71 ) and a stretching press roller ( 72 ) which are oppositely provided, the stretching press roller ( 72 ) pressing the entire electrode plate ( 9 ) on the stretching drive roller ( 71 ), so as to allow a conveying speed of the electrode plate ( 9 ) to be equal to a speed of the stretching drive roller ( 71 ), and the speed of the stretching drive roller ( 71 ) being greater than a speed of the press roller ( 21 ) of the rolling mechanism ( 2 ).   
     
     
         8 . The roller-press apparatus according to  claim 7 , further comprising:
 a synchronizing roller pair ( 8 ) close to the rolling mechanism ( 2 ) and comprising a synchronizing drive roller ( 81 ) and a synchronizing press roller ( 82 ) which are oppositely provided, the synchronizing press roller ( 82 ) pressing the entire electrode plate ( 9 ) on the synchronizing drive roller ( 81 ), so as to allow the conveying speed of the electrode plate ( 9 ) to be equal to a speed of the synchronizing drive roller ( 81 ), and the speed of the synchronizing drive roller ( 81 ) being equal to the speed of the press roller ( 21 ) of the rolling mechanism ( 2 ).   
     
     
         9 . The roller-press apparatus according to  claim 8 , wherein a parallelism difference between an axial line of the synchronizing drive roller ( 81 ) and an axial line of the stretching drive roller ( 71 ) is ≦0.1 mm. 
     
     
         10 . The roller-press apparatus according to  claim 7 , wherein the speed of the press roller ( 21 ) and/or the synchronizing drive roller ( 81 ) is V1, the speed of the stretching drive roller ( 71 ) is V2, and V2=V1*(1+n), and, 0<n≦0.100. 
     
     
         11 . The roller-press apparatus according to  claim 8 , wherein the speed of the press roller ( 21 ) and/or the synchronizing drive roller ( 81 ) is V1, the speed of the stretching drive roller ( 71 ) is V2, and V2=V1*(1+n), and, 0<n≦0.100.