ELECTRODE ASSEMBLY, ELECTROCHEMICAL DEVICE, AND ELECTRICAL DEVICE

An electrode assembly includes a first electrode plate and a second electrode plate of opposite polarities. A first current collector includes a first conductive layer, a first insulation layer, and a second conductive layer. A first active material layer is provided with a first groove. A first surface is exposed in the first groove. A second surface is covered by a second active material layer. The second active material layer is provided with a second groove. The first surface is covered by the first active material layer. The second surface is exposed in the second groove. A first tab is at least partially accommodated in the first groove, and is bonded to the first single-side blank foil region by a first adhesive layer. A second tab is at least partially accommodated in the second groove, and is bonded to the second single-side blank foil region by a second adhesive layer.