Method for sealing battery

• US 4,145,485 A
• Filed: 06/27/1977
• Issued: 03/20/1979
• Est. Priority Date: 01/24/1977
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Kinsman, Gordon F.
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US05/809,975
• Time in Patent Office: 631 Days
• Field of Search: 429/162, 429/153, 429/154, 429/152, 429/151, 429/149, 429/163, 429/155, 429/210
• US Class Current: 429/152
• CPC Class Codes: H01M 6/48 with bipolar electrodes
• CPC Class Codes: Y10T 29/49112 including laminating of indefinite length material

Abstract

A method of sealing a laminar battery in which the central region of the battery is cooled and held under pressure while the peripheral regions of the battery are heated under the same or a lower pressure. The thicknesses of the materials are chosen so that the completed battery is substantially as thick at the edges as in its central regions.

Claims

1. A thin, flat laminar battery comprising cells including active components comprising laminar anodes and cathodes separated by laminar separators, said cells being chemically isolated and electrically connected in series by intermediate laminar intercell connectors, insulating frames having central openings receiving said anodes and cathodes and being bonded together to form a peripheral seal surrounding said active components, and terminal laminae comprising opposed thin metal terminal sheets bonded to thermoplastic liquid impervious conductive current collectors, said current collectors being in contact with electrodes of opposite polarity on either side of said battery and being bonded to said frames at their peripheries to complete a seal about said active components without deformation of said metal terminal sheets;

in which the combined thicknesses of said frames are substantially equal to the combined thicknesses of said anodes, said cathodes, said separators and said intercell connectors.

2. A flat laminar battery comprising a plurality of superposed laminar cells separated by laminar conductive plastic intercell connectors and terminated by conductive plastic current collectors having metal terminals adhered to the outer surfaces thereof, contiguous laminar insulating frames of hot melt adhesive between said intercell connectors and said current collectors and formed with central openings receiving said cells, said frames being fused to each other and to contiguous portions of said intercell connectors and said current collectors to form peripheral seals around said cells, in which said frames have thicknesses determined in dependence on the combined thickness of said cells and said intercell connectors so that each lamina of said battery has edges substantially coplanar with its central portions after fusion of said frames.