Multiple duty battery

• US 4,204,036 A
• Filed: 03/29/1979
• Issued: 05/20/1980
• Est. Priority Date: 03/29/1979
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Cohen, Frederic S., Hyland, Albert L.
• Primary Examiner(s): LeFevour, Charles F.
• Application Number:
  US06/025,087
• Time in Patent Office: 418 Days
• Field of Search: 429/152, 429/158, 429/162, 429/178
• US Class Current: 429/152
• CPC Class Codes: H01M 16/00 Structural combinations of different types of electrochemical generators
• CPC Class Codes: H01M 50/50 Current conducting connections for cells or batteries
• CPC Class Codes: H01M 6/48 with bipolar electrodes

Abstract

A laminar battery capable of providing multiple currents and capacities at different voltages, in which electrical access is provided to intermediate cells in the battery by conductive metal terminal layers incorporated in the structure of the battery.

Claims

1. A laminar multiple duty battery, comprising a stack of series connected cells extending between a first outer terminal and a second outer terminal and comprising at least one intercell terminal assembly connecting a pair of adjacent cells in said stack, each intercell terminal assembly comprising a conductive metal element formed with a tab projecting from the battery for connection to external circuitry, each said metal element being covered on both sides at least in the region within the battery by conductive plastic current collectors extending over at least the active cell regions of the contiguous cells.

2. The battery of claim 1, further comprising a laminar insulating member adhered to one of said outer terminals, and the other of said outer terminals being formed with an extension, each said extension formed on each said conductive element and said outer terminal extension being folded around said battery over different regions of said insulating member.

3. A laminar multiple duty battery, comprising a stack of at least two series connected cells extending between a first outer terminal and a second outer terminal and comprising an intercell terminal assembly connecting a pair of adjacent cells in said stack, said intercell terminal assembly comprising a conductive metal element formed with an extension projecting from the battery for connection to external circuitry, said metal element being covered on both sides at least in the region within the battery by conductive plastic current collectors extending over at least the active cell regions of the contiguous cells.

4. The battery of claim 3, in which said cells each comprise a laminar anode and a laminar cathode, the anodes in said cells all being of the same area and the cathodes in said cells all being of the same area.

5. The battery of claim 4, in which, in each cell between said first outer terminal and said conductive metal element, the anode and the cathode are of different thickness than the anode and the cathode, respectively, in each cell between said conductive element and said second outer terminal.

6. The battery of claim 4, in which the anodes in said cells are all of the same thickness and the cathodes in said cells are all of the same thickness.

7. The battery of claim 3, in which said cells each comprise a laminar anode and a laminar cathode, and in which the anode and the cathode in each cell between said first outer terminal and said conductive metal element have lateral areas different from the lateral areas of the anode and the cathode in each cell between said conductive metal element and said second outer terminal.

8. The battery of claim 7, in which the anodes and the cathodes in each cell between said first outer terminal and said conductive element are of smaller thickness and lateral area than the anode and the cathode, respectively, in each cell between said conductive metal element and said outer terminal.

9. The battery of claim 3, in which each cell between said first outer terminal and said conductive element comprises a cathode having a first lateral area and a first thickness, and in which each cell between said conductive element and said second outer terminal comprises a cathode comprising a first cathode stratum of said first thickness and said first lateral area on a second cathode stratum of a second area larger than said first area.

10. The battery of claim 9, in which each first cathode stratum, and each cathode between said first outer terminal and said conductive element, are of a first composition, and in which each second cathode stratum is of a second composition, said first composition being chosen for a first current drain rate and said second composition being chosen for a second current drain rate.

11. A laminar multiple duty battery, comprising a stack of at least three series connected cells extending between a first outer metal terminal sheet and a second outer metal terminal sheet, at least two intercell terminal assemblies each connecting a different adjacent pair of cells in said stack, each intercell terminal assembly comprising a laminar metal conducting element formed with an extension projecting from the battery for connection to external circuitry, each of said conducting elements being covered on both sides at least in the region within the battery by conductive plastic over at least the active cell regions of the contiguous cells.

12. The battery of claim 11, in which said cells comprise laminar anodes and laminar cathodes, and in which all of said cathodes are of the same area, and in which all of said anodes are of the same area.

13. The battery of claim 12, in which all of said cathodes are of the same thickness.

14. The battery of claim 12, in which all of said anodes are of the same thickness.

15. The battery of claim 12, in which the cathode in the cell contiguous with one side of a first of said intercell terminal assemblies is of different thickness from the cathode in the cell contiguous with the other side of said first intercell connector.

16. The battery of claim 11, in which said cells comprise laminar anodes and laminar cathodes, and in which the anode and cathode of a cell contiguous with a first side of a first of said intercell terminal assemblies have a first lateral anode area and a first lateral cathode area, and in which the anode and cathode in the cell contiguous with the other side of said first intercell terminal assembly have second lateral anode and cathode areas larger than said first anode and cathode areas, respectively.