Compact high voltage battery

• US 4,194,061 A
• Filed: 03/23/1979
• Issued: 03/18/1980
• Est. Priority Date: 03/23/1979
• 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., Kinsman, Gordon F.
• Primary Examiner(s): LeFevour, Charles F.
• Application Number:
  US06/023,309
• Time in Patent Office: 361 Days
• Field of Search: 429/152-155, 429/72, 429/82, 429/162
• US Class Current: 429/82
• CPC Class Codes: H01M 50/30 Arrangements for facilitating escape of gases
• CPC Class Codes: H01M 50/394 Gas-pervious parts or elements
• CPC Class Codes: H01M 6/48 with bipolar electrodes

Abstract

A high voltage, low impedance laminar battery comprising a stack of series connected cells confined under pressure in a housing. The cells comprise laminar anodes, cathodes and separators. The cells are connected in series by laminar conductive intercell connectors. An annular spacer is associated with each cell. The spacers are separated by interdigitated ones of the separators and intercell connectors.

Claims

1. A battery, comprising a housing, said housing comprising a cylindrical wall and end caps secured to opposed ends of said wall to form a chamber between said wall and said end caps;

a plurality of laminar electrical cells stacked in contiguous series relationship in said chamber, said cells each comprising an electrically conductive layer, an anode layer on said electrically conductive layer, a separator permeated by liquid electrolyte on said anode layer, and a slurry cathode layer comprising a dispersion of cathode particles in liquid electrolyte on a central region of said separator; and

an insulating spacer on each separator and formed with a central opening within which the cathode layer on said separator is received;

the spacer on each separator, except the spacer on the separator in an end one of said cells, being separated from the spacer on the separator in the next contiguous cell by the electrically conductive layer, the anode layer, and the separator of said next contiguous cell.

2. The battery of claim 1, in which said stacked cells are terminated by a first metal collector plate adhered to the electrically conductive layer of a cell at one end of said stacked cells, and by an electrically conductive layer in contact with the cathode of the cell at the other end of said stacked cells and adhered to a second metal collector plate, means located between at least one of said end caps and an adjacent one of said metal collector plates for exerting pressure on said end caps and said stacked cells, and means forming at least one gas venting passage between said closed chamber and the exterior of said housing.

3. The battery of claim 2, in which the borders of said spacers extend beyond the borders of said anode layers, said electrically conducting layers, and said separators, forming toroidal gas spaces in said chamber between said wall, adjacent spacers, and the peripheries of said separators and said layers.

4. A battery, comprising a housing, said housing comprising a cylindrical wall and end caps secured to opposed ends of said wall to form a chamber between said wall and said end caps;

a plurality of laminar electrical cells stacked in contiguous series relationship in said chamber, said cells each comprising an electrically conductive layer, an anode layer on said electrically conductive layer, a separator permeated by liquid electrolyte on said anode layer, and a slurry cathode layer comprising a dispersion of cathode particles in liquid electrolyte on a central region of said separator; and

an insulating spacer supported on but not adhered to each separator and formed with a central opening within which the cathode layer on said separator is received;

the spacer on each separator, except the spacer on the separator in an end one of said cells, being separated from the spacer on the separator in the next contiguous cell by the electrically conductive layer, the anode layer, and the separator of said next contiguous cell; and

the borders of said spacers being adjacent to but not adhered to said wall to admit the passage of gas between said spacers and said wall.

5. A battery, comprising a housing, said housing comprising a cylindrical wall and end caps secured to opposed ends of said wall to form a chamber between said wall and said end caps;

a plurality of laminar electrical cells stacked in contiguous series relationship in said chamber, said cells each comprising a conductive plastic layer, an anode on said conductive plastic layer, a separator on said anode, a cathode on a central region of said separator and liquid electrolyte permeating said anode, said separator, and said cathode; and

an insulating spacer adhered to the borders of said conductive plastic layer and supported on but not adhered to each separator and formed with a central opening within which the cathode layer on said separator is received;

the spacer on each separator, except the spacer on the separator in an end one of said cells, being separated from the spacer on the separator in the next contiguous cell by the conductive plastic layer, the anode layer, and the separator of said next contiguous cell; and

the borders of said spacers being adjacent to but not adhered to said wall to admit the passage of gas between said spacers and said wall.

6. A battery, comprising a housing, said housing comprising a cylindrical wall and end caps secured to opposed ends of said wall to form a chamber between said wall and said end caps;

a plurality of laminar electrical cells stacked in contiguous series relationship in said chamber, said cells each comprising an electrically conductive layer, a zinc anode layer on said electrically conductive layer, a cellophane separator permeated by liquid electrolyte on said anode layer, and a slurry cathode layer comprising a dispersion of manganese dioxide and carbon particles in liquid electrolyte on a central region of said separator; and

an insulating spacer supported on but not adhered to each separator and formed with a central opening within which the cathode layer on said separator is received;

the spacer on each separator, except the spacer on the separator in an end one of said cells, being separated from the spacer on the separator in the next contiguous cell by the electrically conductive layer, the anode layer, and the separator of said next contiguous cell; and

the borders of said spacers being adjacent to but not adhered to said wall to admit the passage of gas between said spacers and said wall.