ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE

Provided are an electrode assembly, a battery cell, a battery, and an electrical device. The electrode assembly includes first electrode plates and a second electrode plate that are of opposite polarities. The second electrode plate and two first electrode plates are stacked and wound to form the electrode assembly. The second electrode plate is located between the two first electrode plates. Each of the first electrode plates includes a first composite current collector and a first active material layer. The first active material layer is disposed on a surface that is of the first composite current collector and that is oriented back from the second electrode plate. The first composite current collector is configured to dielectrically isolate the first active material layer from the second electrode plate and allow passage of ions transmitted between the first active material layer and the second electrode plate.