| abstract |
SUMMARY OF THE INVENTION The present invention provides an ultra-thin electrochemical multi-cell energy storage device in a single lightweight flexible casing. The energy storage device uses a perforated independent frame to form its internal structure. In an assembly made by bonding a multilayer current collector to a perforated independent frame, filling an opening formed therein with an electrode material, and laminating a current collector having an electrolyte between the electrodes, a plurality of cells are formed. Arranged as a plurality of stacks, the structure of the assembly allows all cells to be connected in series or in parallel, or a combination thereof. The external current collector has good lateral conductivity due to its composite structure and provides pressure-sensitive interfacial contact. This energy storage device is advantageous because it exhibits low resistance, low ESR, and high voltage / capacity while preferably maintaining a thickness of less than 1 millimeter. |