A secondary battery includes a first
electrode plate, a second
electrode plate, a separator interposed therebetween, and at least one insulation member. The first
electrode plate has a first electrode collector having at least one surface on which a first electrode active material is coated to form a
coating portion, a first electrode uncoated portion formed on at least one end of the first electrode collector, and a first protrusion formed on at least one end of the electrode
coating portion. The second electrode plate includes a similar second electrode collector, a second electrode
coating portion, a second electrode uncoated portion, and a second protrusion. The separator insulates the first electrode plate from the second electrode plate. The at least one insulation member is formed on and covers the first protrusion, the second protrusion, or both such that an
electrolyte is flowable through the at least one insulation member.