BATTERIES COMPRISING A MULITLAYER DIELECTRIC AND SEALING FILM AND METHOD OF MAKING THE BATTERIES

摘要

A multilayer dielectric and sealing film is disclosed. The multi-layer dielectric sealing film comprises a layer of dielectric material and at least one layer of sealing material. The multilayer film may be positioned between the current collector tabs and the packaging material of a thin film battery to prevent shorting between the tabs and the edge of a metal foil layer in the packaging material. The multi-layer film also provides additional sealant which can flow around and seal around the terminals. By combining the sealing material and the dielectric material into one multi-layer assembly, manufacturing steps can be eliminated.

主权项

1. A battery comprising:
a battery cell having a periphery, the battery cell comprising an anode, a cathode and an electrolyte between the anode and cathode; an anode tab comprising a first portion in electrical contact with the anode and a second portion extending beyond the periphery of the cell and/or a cathode tab comprising a first portion in electrical contact with the cathode and a second portion extending beyond the periphery of the cell; an upper packaging layer and a lower packaging layer surrounding the battery cell, wherein the upper and lower packaging layers are sealed together to form a seal area in a periphery of the battery cell and wherein the anode and/or cathode tabs extend between the upper and lower packaging materials in the seal area; and a multi-layer dielectric sealing film between the anode and/or cathode tabs and the upper packaging material in the seal area, wherein the multi-layer dielectric sealing film comprises a layer of dielectric material and a first layer of sealing material.