Method for Treating Electrode Tabs of Crude Cell for Lithium Secondary Battery, and Crude Cell and Lithium Secondary Battery According to the Method

• US 20080083113A1
• Filed: 10/12/2007
• Published: 04/10/2008
• Est. Priority Date: 06/12/2002
• Status: Abandoned Application

• Current Assignee: SolarEdge Technologies Korea Co., Ltd. (Solaredge Technologies Incorporated)
• Original Assignee: Kokam Company Limited (Solaredge Technologies Incorporated)
• Inventors: Hong, Ji-Jun
• Application Number:
  US11/871,177
• Publication Number:
  US 20080083113A1
• Time in Patent Office: Days
• US Class Current: 29/623.4
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0583 of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
• CPC Class Codes: H01M 50/417 Polyolefins
• CPC Class Codes: H01M 50/466 U-shaped, bag-shaped or folded
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/49114 including adhesively bonding

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 includes the steps of: (a) gathering a plurality of anode grids and plurality of cathode grids having a plurality of anode plates and cathode plates, respectively; (b) welding an anode tab and a cathode tab to respective end portions of the anode grids and the cathode grids to form an anode side welded portion and cathode side welded portion; and (c) attaching an insulating tape to the anode side welded portion and cathode side welded portion with an adhesive to wrap the welded portions with an insulating tape.

Claims

1. 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 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.