SECONDARY BATTERY

A secondary battery includes: an electrode assembly including: a first electrode plate on which a first electrode tap is located; a second electrode plate on which a second electrode tap is located; and a separator between the first electrode plate and the second electrode plate; fillers on a front surface of the electrode assembly; and a case accommodating the electrode assembly. The electrode assembly has a first surface and a second surface at an outmost edge, and facing the case in a stacking direction of the electrode assembly. At least one of the first surface or the second surface includes a central region where a thickness of the electrode assembly is constant, and edge regions other than the central region, and the fillers are located in the edge regions.