Abstract: A separator for use in laminated multi-layer electrochemical cell device structures. The devices comprise positive and negative electrode layer members of polymeric matrix composition having the microporous polyolefin membrane separator member interposed therebetween wherein the separator membrane includes a polymer coating layer. The separator is treated to provide a deposited coating of a primary plasticizer for the polymer coating layer. The device electrode and separator members are then assembled and laminated at a compressive force and temperature at which the plasticizer film softens the polymer coating of the separator member sufficiently to establish a strong interfacial bond with the matrix polymers of the electrode members and thereby form a laminated unitary cell structure. In another embodiment, the primary plasticizer comprises a component of the electrode polymeric matrix compositions.

Abstract: A battery package assembly comprises a package having an interior volume sealingly containing at least one electrochemical cell therein, and opposite polarity electrical connectors adapted to connect said at least one electrochemical cell to an external load. At least one of the opposite polarity electrical connectors is adapted to automatically shut down the battery in response to a sufficient increase in internal pressure within the battery package.