Casing for an electrochemical cell having small bulk

• US 3,928,077 A
• Filed: 09/05/1974
• Issued: 12/23/1975
• Est. Priority Date: 07/12/1974
• Status: Expired due to Term

• Current Assignee: Francis Sperandio, Michel Guglieri
• Original Assignee: Francis Sperandio, Michel Guglieri
• Inventors: Sperandio, Francis, Guglieri, Michel
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US05/503,253
• Time in Patent Office: 474 Days
• Field of Search: 136/111,107,133,166,134,135
• US Class Current: 429/162
• CPC Class Codes: H01M 10/34 Gastight accumulators
• CPC Class Codes: H01M 50/174 adapted for the shape of the cells
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The invention concerns an electrochemical cell provided with a casing which comprises a metallic sheet, one portion of which is partly in contact with an electrode of one polarity. Such a cell is characterized more particularly in that the portion of the sheet in contact with the electrode is offset inwardly towards the inside of the generator in relation to the remainder of the said portion. The invention is applicable to electrochemical cells having small bulk in at least one dimension.

Claims

1. AN ELECTROCHEMICAL CELL COMPRISING A CASING, ELECTROLYTE, A FIRST ELECTRODE OF ONE POLARITY, A SECOND ELECTRODE AND A THIRD ELECTRODE BOTH OF LIKE OPPOSITE POLARITY LOCATED RESPECTIVELY ON EACH SIDE OF THE FIRST ELECTRODE, SEPARATOR MEANS BETWEEN THE ELECTRODES AND ELECTROLYTE WITHIN SAID CASING, SAID CASING COMPRISING A METAL SHEET MEMBER HAVING THE SHAPE OF A SHALLOW CUP, A CENTRAL PART OF THE BOTTOM OF SAID CASING BEING OFFSET INWARDLY OF SAID CASING IN RELATION TO THE REMAINDER OF SAID BOTTOM AND DEFINING A PERIPHERAL RIM IN PERMEANENT CONTACT WITH THE SAID SECOND ELECTRODE IRRESPECTIVE OF OUTWARD DEFORMATION OF SAID CELL DURING USE, AND SAID CELL ALSO COMPRISING A LID OF INSULATING MATERIAL OVER WHICH THE SAID MEMBER IS CRIMPED AND TERMINAL MEANS CONNECTED TO THE FIRST ELECTRODE SEALINGLY MOUNTED ON SAID LID.

2. An electrochemical cell according to claim 1 wherein said second and third electrodes are negative electrodes and said first electrode is a positive electrode.