Patent ID: 7067218

Claim:
A method of treating electrode tabs of a crude cell provided with a plurality of anode plates having a plurality of respective anode grids, a plurality of cathode plates having a plurality of respective cathode grids, and a separator strip interposed, in a fold to fold manner, between said anode plates and said cathode plates which are disposed alternately including the steps of: (a) gathering said anode grids and said cathode grids, respectively, so that the grids are proximate or substantially parallel to a first surface; (b) cutting an end portion of said anode grids and said cathode grids so that said anode grids and said cathode grids are of the shortest length required for being welded to a plurality of respective tab members; (c) welding an anode tab member and a cathode tab member to respective said end portions of said anode grids and said cathode grids to form an anode side welded portion and a cathode side welded portion; (d) attaching an insulating tape to said anode side welded portion and said cathode side welded portion so that said insulating tape can wrap said welded portions; (e) bending said anode grids and said cathode grids at a plurality of respective first bend portions so that said grids can be close to a second surface which is opposite to said first surface, and be substantially perpendicular to said second surface; and (f) bending said respective tab members at a plurality of respective second bend portions so that said tab members can be close to said respective first bend portion, and be substantially parallel to said first surface.