Electrical cells and batteries

• US 4,125,684 A
• Filed: 06/30/1977
• Issued: 11/14/1978
• Est. Priority Date: 06/30/1977
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Land, Edwin H.
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US05/811,468
• Time in Patent Office: 502 Days
• Field of Search: 429/162, 429/152, 429/153, 429/149, 429/154, 429/160, 429/178, 429/122
• US Class Current: 429/122
• CPC Class Codes: H01M 4/06 Electrodes for primary cells
• CPC Class Codes: H01M 6/06 Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
• CPC Class Codes: H01M 6/48 with bipolar electrodes

Abstract

Laminar electrical cells in which one electrode comprises a thin layer of active electrode particles adhered to a central region of a conductive plastic substrate and in contact with a central region of a separator sheet of liquid permeable material. The other electrode is a slurry dispersion of active electrode particles in an aqueous solution of electrolytes in contact with the opposite side of the separator sheet. The aqueous solution permeates the separator and both electrodes.

Claims

1. An electrode terminal subassembly, comprising a thin, flat metal terminal sheet, a thin, flat current collector sheet of conductive plastic conductively adhered to said terminal sheet, a thin, flat dry patch electrode adhered to a predetermined region of the surface of said current collector within the peripheries of said current collector, a thin, flat separator over said electrode and extending beyond the boundaries of said electrode over adjacent regions of said current collector within said peripheries, and an insulating frame over said current collector and said separator, said frame being formed with a central aperture in registry with said electrode and smaller than said separator, and said frame being adhered to regions of said current collector beyond the boundaries of said separator.

2. An anode terminal subassembly, comprising a thin, flat metal terminal sheet, a thin, flat current collector sheet of conductive plastic conductively adhered to said terminal sheet, a thin, flat dry patch anode adhered to a predetermined region of the surface of said current collector within the peripheries of said current collector, a thin, flat cellophane separator over said anode and extending beyond the boundaries of said anode over adjacent regions of said current collector within said peripheries, and an insulating frame over said current collector and said separator, said frame being formed with a central aperture in registry with said anode and smaller than said separator, and said frame being sealed to regions of said current collector beyond the boundaries of said separator.

3. An anode terminal subassembly, comprising a thin, flat metal terminal sheet, a thin, flat current collector sheet of conductive plastic adhered to said terminal sheet, a thin, flat zinc anode covering a predetermined region of the surface of said current collector within the peripheries of said current collector, a thin, flat cellophane separator over said anode and extending beyond the boundaries of said anode over adjacent regions of said current collector within said peripheries, and an insulating frame of thermoplastic material over said current collector and said separator, said frame being formed with a central aperture in registry with said anode and smaller than said separator, and said frame being sealed to regions of said current collector beyond the boundaries of said separator.

4. A subassembly for use in the manufacture of laminar batteries and comprising, in combination, a conductive plastic intercell connector, a dry patch anode layer adhered to a central region of a surface of said intercell connector within its boundaries, a thin, flat cellophane separator covering said anode layer and extending beyond the boundaries of said anode layer over portions of said intercell connector within the boundaries of said intercell connector, and a thin, flat frame of insulating material overlapping said separator and having a central opening in registry with said anode layer, said frame having border portions adhered to regions of said surface of said intercell connector beyond the boundaries of said separator.

5. The subassembly of claim 4, further comprising a cathode slurry patch adhering to a surface of said intercell connector opposite said surface to which said anode layer is adhered.

6. A subassembly for use in the manufacture of laminar batteries and comprising, in combination, a conductive plastic intercell connector, a dry patch anode layer of zinc particles adhered with an adhesive binder to a central region of a surface of said intercell connector within its boundaries, a cellophane separator covering said anode layer and extending beyond the boundaries of said anode layer over portions of said intercell connector within the boundaries of said intercell connector, and a thin, flat frame of insulating material adhered to regions of said surface of said intercell connector beyond the boundaries of said separator.

7. The subassembly of claim 6, further comprising a cathode slurry patch comprising a dispersion of manganese dioxide and carbon particles in an aqueous solution of electrolytes adhering to a surface of said intercell connector opposite said surface to which said anode layer is adhered.