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1. WO1996006463 - SEAL FOR ELECTROCHEMICAL CELL

Publication Number WO/1996/006463
Publication Date 29.02.1996
International Application No. PCT/US1995/010442
International Filing Date 17.08.1995
Chapter 2 Demand Filed 22.03.1996
IPC
H01M 2/04 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
02Cases, jackets or wrappings
04Lids or covers
H01M 2/08 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
02Cases, jackets or wrappings
08Sealing materials
H01M 2/12 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
12Vent plugs or other mechanical arrangements for facilitating escape of gases
CPC
H01M 2/0421
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details or processes of manufacture of the non-active parts
02Cases, jackets or wrappings
04Lids or covers
0404for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
0408Crimp-sealed cells or batteries; Cells or batteries with turned-over edges
0417comprising an insulating cover provided with an axial bore for receiving a central current collector
0421with an external conductive cover
H01M 2/08
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details or processes of manufacture of the non-active parts
02Cases, jackets or wrappings
08Sealing materials
H01M 2/1235
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details or processes of manufacture of the non-active parts
12Vent plugs or other mechanical arrangements for facilitating escape of gases
1235Emergency or safety arrangements of non-resealable design
Applicants
  • DURACELL, INC. [US/US]; Berkshire Corporate Park Bethel, CT 06801, US
Inventors
  • DePALMA, Christopher, L.; US
  • FONTAINE, Lucien, P.; US
  • MOSES, Peter, Ricker; US
  • WIACEK, Marian; US
  • YOPPOLO, Robert, A.; US
  • POPE, Peter; GB
  • TUBBY, Francis, Bruce; US
  • WOODNORTH, Douglas, J.; US
Agents
  • CORNELL, Ronald, S.; Duracell Inc. 255 Highland Avenue Needham, MA 02194, US
Priority Data
08/295,33624.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SEAL FOR ELECTROCHEMICAL CELL
(FR) OPERCULE POUR CELLULE ELECTROCHIMIQUE
Abstract
(EN)
An electrochemical cell has a wheel shaped molded plastic seal member (10) of a unitary construction which includes a central cylindrical hub (12) from which depend in outward radial sequence, an annular pressure vent (18), a boss (26), a downward projecting skirt (30), an annular flexure means (38), for providing radial movement and an outer rim terminating at its periphery in a cylindrical wall (40). The pressure vent (18) includes a thin membrane ring (22) depending from the hub (12) which joins the hub (12) to an annular diaphragm (20). A hinged ring (24) joins the periphery of the diaphragm (20) to the boss (26). The seal (10) member is designed so that the membrane ring (22) fails primarily in shear at excessive cell pressure which makes the vent (18) more reliable and easier to fabricate.
(FR)
Cellule électrochimique munie d'un opercule (10) monobloc en plastique moulé en forme de roue comportant un moyeu cylindrique (12) dont dépend une séquence radiale extérieure, un évent de surpression annulaire (18), un bossage (26), une jupe (30) dirigée vers le bas, un moyen de flexion (38) annulaire permettant un jeu radial et une jante extérieure dont la périphérie se prolonge par une paroi cylindrique (40). L'évent de surpression (18) comporte une fine membrane annulaire (22) dépendant du moyeu (12) et le reliant à un diaphragme annulaire (20). Une bague articulée (24) relie la périphérie du diaphragme (20) au bossage (26). L'opercule (10) est conçu pour que la membrane annulaire (22) se rompe la première par cisaillement en cas de pression trop forte dans la cellule, d'où un évent (18) plus fiable et plus facile à fabriquer.
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