Method for treating electrode tabs of crude cell for lithium secondary battery, and crude cell and lithium secondary battery according to the method

Abstract

A method for treating electrode tabs of a crude cell for a lithium secondary battery, a crude cell for a lithium secondary battery manufactured according to the method, and a lithium secondary battery employing the crude cell are disclosed. The method for treating electrode tabs of a crude cell provided with a plurality of anode plates having respective anode grids, a plurality of anode plates having respective anode grids includes the steps of: (a) gathering the anode grids and the cathode grids cutting the end portions to have the shortest length required for being welded to respective tab members; (b) welding anode and cathode tab members to respective end portions of the anode and cathode grids; (c) attaching insulating tape to wrap the welded portions; (d) bending the anode and cathode grids; and (e) bending the respective tab members.

1 . A method of treating electrode tabs of a crude cell for a lithium secondary battery including the steps of: 
 (a) welding a tab member to an end of a grid of said crude cell to create a welded portion;    (b) attaching an insulating tape to the circumference of an electrode tab so that said insulating tape can wrap around said electrode tab which is formed by said welded portion.    
     
     
         2 . A method of treating electrode tabs of a crude cell for a lithium secondary battery including the steps of: 
 (a) gathering a plurality of anode grids and a plurality of cathode grids of said crude cell provided with a plurality of anode plates having respective said anode grids, a plurality of cathode plates having respective said cathode grids, and a separator strip interposed between said anode plates and said cathode plates which are disposed alternately;    (b) welding an anode tab member and a cathode tab to respective end portions of said anode grids and said cathode grids to form an anode side welded portion and a cathode side welded portion; and    (c) attaching an insulating tape to said anode side welded portion and said cathode side welded portion with an adhesive so that said insulating tape wraps around said welded portions.    
     
     
         3 . A crude cell for a lithium secondary battery including: 
 (a) a plurality of anode plates having respective grids;    (a) a plurality of cathode plates having respective grids;    (b) a separator;    (c) an anode tab member and a cathode tab member; and    (d) an insulating tape;    wherein said anode tab member and said cathode tab member are welded to said anode grids and said cathode grids, respectively, and the welded portions are wrapped with said insulating tape.    
     
     
         4 . The crude cell as claimed in  claim 3 , wherein at least two bend portions are formed at a grid portion and a tab member portion.  
     
     
         5 . A crude cell as claimed in  claim 3 , wherein said crude cell is utilized in a lithium secondary battery including: 
 (a) a package member for receiving the crude cell; and    (e) an electrolyte filled in the package member.