ELECTRODE PLATE ASSEMBLY, BATTERY CELL, AND ELECTRICAL DEVICE

An electrode plate assembly includes an electrode plate and a tab. An electrode plate includes a first surface and a second surface that are disposed opposite to each other along a thickness direction of the electrode plate. The tab is disposed on the first surface and electrically connected to the electrode plate. A first bulge is disposed on the tab. A first recess is disposed on the first surface and recessed toward the second surface. The first recess does not penetrate the second surface. The first bulge is at least partially embedded into the first recess. The first bulge is at least partially embedded into the first recess to form a structure in which the electrode plate engages with the tab, thereby increasing connection strength between the tab and the electrode plate, and increasing tensile strength of the electrode plate assembly.