Battery cell, method for manufacturing battery cell, and battery pack and vehicle including battery cell
The innovative battery cell design with spiral or concentric welding of foil tabs and current collector plates addresses the issue of high electrical resistance by improving connectivity and welding strength, resulting in reduced resistance and enhanced productivity.
WO2026134988A1PCT designated stage Publication Date: 2026-06-25LG ENERGY SOLUTION LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-06-25
Smart Images
Figure KR2025021294_25062026_PF_FP_ABST
Abstract
A battery cell according to the present invention comprises: an electrode assembly provided wound around a winding center hole in a state in which a separator is interposed between electrodes having different polarities; and current collector plates electrically connected to a plurality of foil tabs provided on the electrodes, wherein the foil tabs are primarily welded and coupled to one another, while forming first welding lines, to form foil tab assemblies, and the current collector plates are secondarily welded and coupled to the foil tab assemblies, while forming second welding lines intersecting and connected to the first welding lines, after the primary welding.
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