Patent ID: 9548482
Date: 2017-01-17
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. An electrode assembly configured to have a structure in which two or more unit cells are sequentially stacked or a structure in which two or more unit cells are folded using a long sheet type separation film, wherein the unit cells comprise bi-cells, each of which comprises a positive electrode, a negative electrode, and a separator, at least one of the bi-cells comprises a safety electrode configured such that an electrode active material is applied only to one major surface of an electrode current collector, the safety electrode comprises a first surface, to which no electrode active material is applied, and a second surface, to which the electrode active material is applied, and the at least one of the bi-cells comprising the safety electrode is configured such that a safety separator, having a thickness equivalent to 110% to 220% of a thickness of a separator disposed between a positive electrode and a negative electrode or between a negative electrode and a positive electrode excluding the safety electrode, is added to the first surface and/or the second surface of the safety electrode.