WO1999034457A9 - Container for a battery cell - Google Patents

Container for a battery cell

Info

Publication number
WO1999034457A9
WO1999034457A9 PCT/SE1998/002341 SE9802341W WO9934457A9 WO 1999034457 A9 WO1999034457 A9 WO 1999034457A9 SE 9802341 W SE9802341 W SE 9802341W WO 9934457 A9 WO9934457 A9 WO 9934457A9
Authority
WO
WIPO (PCT)
Prior art keywords
tube
lids
container
battery cell
external diameter
Prior art date
Application number
PCT/SE1998/002341
Other languages
French (fr)
Other versions
WO1999034457A1 (en
Inventor
Per-Fredrik Andersson
Magnus Andersson
Per Engstroem
Original Assignee
Ni Me Hydrid Ab
Andersson Per Fredrik
Magnus Andersson
Per Engstroem
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ni Me Hydrid Ab, Andersson Per Fredrik, Magnus Andersson, Per Engstroem filed Critical Ni Me Hydrid Ab
Priority to AU18991/99A priority Critical patent/AU1899199A/en
Publication of WO1999034457A1 publication Critical patent/WO1999034457A1/en
Publication of WO1999034457A9 publication Critical patent/WO1999034457A9/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes

Definitions

  • the present invention relates to a container for a closed, rechargeable battery cell, comprising a cylindrical tube of a thermoplastic material provided with two end-closing lids of an electrically conducting material.
  • a container of the type as defined above is disclosed in O-A-97/11500.
  • the lids consist of disks, preferably made of steel, mounted into the ends of the tube with flange constructions and the like in order to accomplish a tight sealing.
  • the tube has a smooth exterior surface but can have different kinds of inner shape in order to accomplish the desired tightness.
  • the object of the present invention is to avoid the drawback with an increased risk for leakage at an increased load without decreasing other advantageous properties.
  • a further advantage of external lids is that the tube gets an entirely smooth inner side and that the available internal space increases so there will be more room for active material .
  • the tube at the ends has shoulders with an outer diameter corresponding to the inner diameter of the lids, and the outer diameter of the lids corresponds to the outer diameter of the tube, a container is accomplished, which has a principally smooth exterior with resulting functional and aesthetical advantages .
  • a further improved assembly between the tube and the lids can be accomplished if there is locking means in the form of a locking ring between each lid and the end of the tube.
  • Fig 1 is a partly sectioned side view of a battery, cell with an end-closing according to the invention
  • Fig 2 is a cross sectional view to a larger scale of the lower part of Fig 1
  • Fig 3 is a sectional view according to Fig 1 of a first alternative embodiment
  • Fig 4 is a sectional view according to Fig 2 of a second embodiment.
  • a closed cylindrical battery cell preferably a nickel-metal hydride battery, is disclosed in O-A-97/11500, to which reference is made for a more detailed background description.
  • the electrodes are in electrical contact with an upper lid and with a lower lid (i.e. a bottom), both made of an electrical conducting metal material.
  • the lids 3 and 4 form together with a cylindrical tube 5 the container of the battery cell.
  • the cylindrical tube 5 is manufactured from a plastic material, preferably a thermoplastic material, such as polypropylene. As is clear from Fig 2, the tube has a constant inner diameter all over its length.
  • the lids 3 and 4 for instance made of stainless or nickel plated steel, are formed like cups or caps and can be deep- drawn. They are intended to be slipped on to the ends of tube 5, which for this purpose can have shoulders with smaller diameter and a length corresponding to the depth of the cups.
  • the external diameter of the shoulder corresponds to the internal diameter of the cups, while the external diameter of the cups corresponds to the external diamter a? of tube 5, so that a smooth passage is formed between the lids 3 and 4 and tube 5.
  • the assembly of the battery cell can be made in the following way: A suitable glue which can have the two aims of both tightening and joining and which can resist the electrolyte of the battery, is applied on the lower shoulder of tube 5 and in the lower lid , after which it is pressed on to the tube. A suitable cylindrical electrode coil, comprising electrodes 1 and separator 2, is inserted in the tube until electrical contact with the lower lid 4. Electrolyte is filled up, after which the upper lid 3 is mounted in the same way as the lower lid 4 and is brought in electrical contact with the electrode coil.
  • the lids 3 and 4 are subjected to axial forces.
  • snap-in closure locking means in the form of a gently curved locking ring 5' (fig 3) or a sharp- edged locking ring 5" (fig 4) with corresponding ring-shaped grooves in the respective lids 3 and 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

A container for a closed, rechargeable battery cell comprises a cylindrical tube (5) of a thermoplastic material provided with two end-closing lids (3, 4) of an electrically conducting material. The lids are arranged at the outside of the ends of the tube.

Description

Container for a battery cell
Technical field
The present invention relates to a container for a closed, rechargeable battery cell, comprising a cylindrical tube of a thermoplastic material provided with two end-closing lids of an electrically conducting material.
Background of the Invention
A container of the type as defined above is disclosed in O-A-97/11500. In said construction the lids consist of disks, preferably made of steel, mounted into the ends of the tube with flange constructions and the like in order to accomplish a tight sealing. The tube has a smooth exterior surface but can have different kinds of inner shape in order to accomplish the desired tightness.
Various loads on the container, such as interior overpressure and heat, give a greater expansion of the plastic tube than of the metal lid. Thus, an increased load results in an increased risk for leakage.
The object of the present invention is to avoid the drawback with an increased risk for leakage at an increased load without decreasing other advantageous properties. The Invention
According to the invention this is accomplished by forming the lids like cups arranged at the outside of the ends of the tube.
This means that with an interior load, with a resulting greater expansion of the tube, the tube will be pressed to an ever increasing extent against the lids with a resulting improved tightness.
A further advantage of external lids is that the tube gets an entirely smooth inner side and that the available internal space increases so there will be more room for active material .
If the tube at the ends has shoulders with an outer diameter corresponding to the inner diameter of the lids, and the outer diameter of the lids corresponds to the outer diameter of the tube, a container is accomplished, which has a principally smooth exterior with resulting functional and aesthetical advantages .
A further improved assembly between the tube and the lids can be accomplished if there is locking means in the form of a locking ring between each lid and the end of the tube.
The Drawing
The invention will be further described below with reference to the appended drawing, in which Fig 1 is a partly sectioned side view of a battery, cell with an end-closing according to the invention, Fig 2 isa cross sectional view to a larger scale of the lower part of Fig 1, Fig 3 is a sectional view according to Fig 1 of a first alternative embodiment and Fig 4 is a sectional view according to Fig 2 of a second embodiment.
Detailed description of a preferred embodiment
A closed cylindrical battery cell, preferably a nickel-metal hydride battery, is disclosed in O-A-97/11500, to which reference is made for a more detailed background description.
Regarding the content of the battery cell in the present case, it will probably be sufficient to point out that there are electrodes 1, separated by a separator 2, and a suitable electrolyte.
The electrodes are in electrical contact with an upper lid and with a lower lid (i.e. a bottom), both made of an electrical conducting metal material.
The lids 3 and 4 form together with a cylindrical tube 5 the container of the battery cell. The cylindrical tube 5 is manufactured from a plastic material, preferably a thermoplastic material, such as polypropylene. As is clear from Fig 2, the tube has a constant inner diameter all over its length.
The lids 3 and 4, for instance made of stainless or nickel plated steel, are formed like cups or caps and can be deep- drawn. They are intended to be slipped on to the ends of tube 5, which for this purpose can have shoulders with smaller diameter and a length corresponding to the depth of the cups. The external diameter of the shoulder corresponds to the internal diameter of the cups, while the external diameter of the cups corresponds to the external diamter a? of tube 5, so that a smooth passage is formed between the lids 3 and 4 and tube 5.
The assembly of the battery cell can be made in the following way: A suitable glue which can have the two aims of both tightening and joining and which can resist the electrolyte of the battery, is applied on the lower shoulder of tube 5 and in the lower lid , after which it is pressed on to the tube. A suitable cylindrical electrode coil, comprising electrodes 1 and separator 2, is inserted in the tube until electrical contact with the lower lid 4. Electrolyte is filled up, after which the upper lid 3 is mounted in the same way as the lower lid 4 and is brought in electrical contact with the electrode coil.
At an increasing internal pressure in the container the lids 3 and 4 are subjected to axial forces. To better withstand these forces one can, instead of the smooth engagement surface between the lids 3 and 4 and the shoulders of tube 5 according to figure 1 and 2, arrange snap-in closure locking means in the form of a gently curved locking ring 5' (fig 3) or a sharp- edged locking ring 5" (fig 4) with corresponding ring-shaped grooves in the respective lids 3 and 4.

Claims

Claims
A container for a closed, rechargeable battery cell, comprising a cylindrical tube (5) of a thermoplastic material provided with two end-closing lids of an electrically conducting material, characterized in that the lids (3,4) are formed like cups, arranged at the outside of the ends of the tube (5) .
A container according to claim 1, characterized in that the tube at the ends has shoulders with an external diameter corresponding to the internal diameter of lids and that the external diameter of the lids corresponds to the external diameter of the tube.
A container according to claim 1, characterized in that between each lid (3,
4) and the end of the tube
(5) locking means are arranged in the form of a locking ring (5', 5").
PCT/SE1998/002341 1997-12-16 1998-12-16 Container for a battery cell WO1999034457A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18991/99A AU1899199A (en) 1997-12-16 1998-12-16 Container for a battery cell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9704684A SE9704684L (en) 1997-12-16 1997-12-16 Container for a battery cell
SE9704684-1 1997-12-16

Publications (2)

Publication Number Publication Date
WO1999034457A1 WO1999034457A1 (en) 1999-07-08
WO1999034457A9 true WO1999034457A9 (en) 1999-09-23

Family

ID=20409405

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002341 WO1999034457A1 (en) 1997-12-16 1998-12-16 Container for a battery cell

Country Status (3)

Country Link
AU (1) AU1899199A (en)
SE (1) SE9704684L (en)
WO (1) WO1999034457A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6605383B1 (en) 2000-11-22 2003-08-12 Eveready Battery Company, Inc. Alkaline electrochemical cell having adhesive closure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325464A1 (en) * 1993-07-29 1995-02-02 Emmerich Christoph Gmbh Co Kg Accumulator with plastic housing
US5512385A (en) * 1994-02-28 1996-04-30 Matsushita Electric Industrial Co., Ltd. Hydrogen storage alloy and nickel-metal hydride storage battery using the same
EP0871980A1 (en) * 1995-09-20 1998-10-21 Ni-Me Hydrid AB A container for a closed, cylindrical, rechargeable battery cell

Also Published As

Publication number Publication date
AU1899199A (en) 1999-07-19
WO1999034457A1 (en) 1999-07-08
SE9704684L (en) 1999-06-17
SE9704684D0 (en) 1997-12-16

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