Patent ID: 8394524
Filing Date: 2013-03-12
Classification: H01G,H01M,Y02E,Y02P

Abstract:
1. A battery unit included in a case, comprising: an electrode plate of a first conductivity including a current collector of the first conductivity and an active material layer of the first conductivity formed on at least one plane of said current collector of the first conductivity and a first electrode lead electrically connected with said current collector of the first conductivity, said first electrode lead protruding beyond said electrode plate of the first conductivity in a longitudinal direction; an electrode plate of a second conductivity including a current collector of the second conductivity and an active material layer of the second conductivity formed on at least one plane of the current collector of the second conductivity and a second electrode lead electrically connected with said current collector of the second conductivity and protruding beyond said electrode plate of the second conductivity in the longitudinal direction; and a separator interposed between said electrode plates of first and second conductivity, said separator including a width greater than said electrode plates of first and second conductivity, said separator including a first protruding portion protruding on one side of said electrode plates where said electrode leads protrude beyond said electrode plates and a second protruding portion protruding on a second side of said electrode plates where no electrode lead protrudes beyond, said first protruding portion having a width of protrusion beyond said electrode plates greater than a width of protrusion beyond said electrode plates of said second protruding portion.