Patent ID: 8323824

Claim:
A laminate battery comprising: a laminate battery case comprising two laminate films each having a metal layer and plastic layers disposed on both faces of the metal layer, the laminate battery case having a welded portion in which peripheral edges of the two laminate films are welded to each other; an electrode assembly enclosed in the laminate battery case and comprising positive electrode plates, negative electrode plates, separators interposed between the positive electrode plates and the negative electrode plates, and positive and negative electrode current collector terminals being respectively connected to the positive and negative electrode plates and protruding from at least one side of the laminate battery case; an internal gas pressure sensing portion in which an inner plastic layer of each of the laminate films is absent and the metal layers are in contact with each other to be in an electrically conductive state, the internal gas pressure sensing portion provided at a portion of the welded portion; and a voltage detection hole in which an outer plastic layer is absent and the metal layer is exposed, the voltage detection hole formed in each surface of the two laminate films.