Abstract: A battery pack (10) including at least one battery cell (26) and a circuit carrier (30) in proximity to the battery cell. Disposed in the battery pack, is a fuse (50) which is formed from an electrically conductive resilient material adapted to work as the fuse. The electrically conductive resilient material further is encapsulated with a material adapted to promote resistance to breakage due to shocks, bumping or droppage of battery packs into which the fuse is incorporated. When the temperature of the at least two battery cells reaches a predetermined trip point, the fuse releases from at least one of the batteries, due to the heat transfer from the battery cell, electrically disconnecting the battery cell from adjacent battery cells.

Abstract: A package for a flat electrochemical device comprises a flexible circuit board. Building from a base layer (62), the flexible circuit board has a conductor layer disposed on the outermost side of the base layer providing a first and second contact portion (56 and 58), a cover coat layer (50) is disposed over the conductor layer and the base layer over the outermost side of the base layer, a first collector (64) is disposed on the first half (47) on the innermost side of the base layer, and a second collector (66) is disposed on the second half (48) on the innermost side of the base layer. The first collector is electrically connected to a runner by a first plated through-hole (70), and the second collector is electrically connected to the second contact portion through a second plated through-hole (72). And finally, a fringe portion (68) is provided by the base layer about the periphery of the first and second halves.