Patent ID: 7846580

Claim:
A lithium polymer battery comprising: a pouch casing comprising a plate having a first side and a second side, a first insulation layer attached to the first side of the plate, and a second insulation layer attached to the second side of the plate, wherein at least a portion of the pouch casing is folded such that three layers of the plate extend along a lateral edge of the pouch casing; an electrode assembly within the pouch casing including a positive electrode, a separator and a negative electrode; a positive electrode tab and a negative electrode tab connected to the positive electrode and the negative electrode, respectively; a protective circuit board electrically connected to the positive electrode tab and to the negative electrode tab; a positive temperature coefficient element between the negative electrode tab and the protective circuit board; and an electrically insulative and thermally conductive reinforcement layer for covering the pouch casing, wherein the reinforcement layer comprises steel reinforced epoxy putty, copper reinforced epoxy putty or aluminum reinforced epoxy putty.