ELECTRODE SHEET, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

This application provides an electrode plate (231), an electrode assembly (23), a battery cell (20), a battery (100), and an electric device. The electrode plate (231) includes a current collector (2311), the current collector (2311) including a conductive layer (23111) and an insulating layer (23112). The conductive layer (23111) includes a tab portion (231111). In thickness direction (Y) of the electrode plate (231), the conductive layer (23111) is provided at two opposite sides of the insulating layer (23112). The insulating layer (23112) includes a first region (231121) and a second region (231122), and in width direction (X) of the electrode plate (231), at least one end of the first region (231121) is connected to the second region (231122). Thickness of the second region (231122) is less than thickness of the first region (231121), and the tab portion (231111) is at least partially disposed in the second region (231122). When individual tab portions (231111) of the electrode assembly (23) formed using the electrode plate (231) are welded, the tab portions (231111) at two sides of the second region (231122) are more easily welded due to the smaller thickness of the second region (231122), thereby achieving electrical connection between the two tab portions (231111), reducing welding difficulty, and mitigating the risk caused by welding quality issues such as false welding of the tab portions (231111) due to the presence of the insulating layer (23112), which is conducive to the improvement in the welding quality of the individual tab portions (231111) of the electrode assembly (23) having the electrode plate (231).