ELECTRODE ASSEMBLY AND RELATED BATTERY, BATTERY MODULE

An electrode assembly as provided includes a plurality of first electrode plates and at least one second electrode plate. The plurality of first electrode plates and the at least one second electrode plate are wound around a winding axis to form a winding structure. In the winding structure, the plurality of first electrode plates and the second electrode plate are arranged in a superimposing manner along a direction vertical to the winding axis. Each first electrode plate includes a first current collector and a first active substance layer, and the first current collector includes a first main body portion and a first tab which protrudes from the first main body portion along the direction of the winding axis; wherein each first tab and the first main body portion are arranged in parallel along the winding axis.