Flat batteries and method of making the same

• US 4,098,965 A
• Filed: 06/27/1977
• Issued: 07/04/1978
• 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:
  US05/809,976
• Time in Patent Office: 372 Days
• Field of Search: 429/151-155, 429/162, 429/149, 429/210
• US Class Current: 429/153
• CPC Class Codes: H01M 6/48 with bipolar electrodes
• CPC Class Codes: Y10T 29/4911 including sealing
• CPC Class Codes: Y10T 29/49114 including adhesively bonding
• CPC Class Codes: Y10T 29/4981 Utilizing transitory attached element or associated separate material

Abstract

A frame and separator assembly for the manufacture of thin, flat laminar batteries in which the frame has adhesive surfaces to which a separator is adhered. The method of making batteries in which these assemblies are placed over electrode slurries extruded onto conductive plastic substrates and the separators are coated with electrolyte and then contacted with dry patch anodes on conductive plastic substrates to form cells.

Claims

1. In a thin, flat laminar battery, a subassembly comprising a frame of liquid impervious insulating material at least the exterior surfaces of which comprise a thermoplastic hot melt adhesive material, means forming an opening within the periphery of said frame adapted to receive the components of an electrical cell, a cellophane separator wet with electrolyte on one surface of said frame covering said opening, a layer of gel electrolyte on said cellophane separator, a conductive plastic intercell connector over said cellophane separator and projecting beyond the boundaries thereof on all sides and thermally sealed to said frame, said intercell connector being within the boundaries of said frame, and a laminar zinc anode patch on said intercell connector in a region in registry with said opening and in contact with said gel electrolyte.

2. The assembly of claim 1, in which said frame comprises two congruent laminae heat sealed together.

3. The assembly of claim 1, in which said frame comprises a thin, flat monolithic loop of hot melt adhesive material.

4. The assembly of claim 2, in which said laminae each comprises a thin, flat loop of non-woven fibrous separator material filled with hot melt thermoplastic adhesive.