ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

This application relates to the field of battery technologies, and specifically to, an electrode assembly, a battery cell, a battery, and an electric device. The electrode assembly includes a first electrode plate, a second electrode plate, and a first insulation layer, the first electrode plate and the second electrode plate being wound to form the electrode assembly, where a winding terminating end of the first electrode plate exceeds a winding terminating end of the second electrode plate by at least half a turn so that the first electrode plate entirely covers an outer surface of an outermost turn of the second electrode plate, and the first insulation layer being applied on an outer surface of an outermost turn of the first electrode plate. According to this application, the terminating end of the first electrode plate is set to exceed the second electrode plate by at least half a turn, so as to prevent the first electrode plate from loosening at a terminating position to cause the second electrode plate to be exposed. The first insulation layer is provided on a surface of the outermost turn of the first electrode plate to prevent the first electrode plate from contacting the battery housing, so that a safety risk and a short circuit risk caused by a charged battery housing are avoided, and safety of the battery is improved.