GB2154049A - Electrochemical cell - Google Patents
Electrochemical cell Download PDFInfo
- Publication number
- GB2154049A GB2154049A GB08403438A GB8403438A GB2154049A GB 2154049 A GB2154049 A GB 2154049A GB 08403438 A GB08403438 A GB 08403438A GB 8403438 A GB8403438 A GB 8403438A GB 2154049 A GB2154049 A GB 2154049A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- cell
- cover
- sealed
- inwardly
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 239000004831 Hot glue Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000010292 electrical insulation Methods 0.000 claims 1
- 239000012777 electrically insulating material Substances 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 239000002657 fibrous material Substances 0.000 description 5
- 239000003566 sealing material Substances 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 229940093470 ethylene Drugs 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- -1 acrylic ester Chemical class 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229940032159 propylene carbonate Drugs 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells 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
- 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
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
An electrochemical cell comprising a can or casing (2) for housing the components of the cell and a cover (20) which is sealed to the can or casing (2), and wherein the upper edges of the walls of the can or casing (2) are turned inwardly to form an inwardly- directed flange (24) to which the cover (20) is sealed. <IMAGE>
Description
SPECIFICATION
Electrochemical cell
The present invention relates to electrochemical cells, and to the sealing of such cells.
It is known to make a sealed electrochemical cell by sealing a cover or lid to a casing or can containing the electro-chemical components of the cell. Our European Patent Publication No. 0081339 describes some cells of this type and a method of sealing such cells.
Some cells of this type are made from a can or casing which is formed at its outer perimeter with an outwardly-oriented horizontal flange. In preparing a sealed cell the cover is sealed to the internal face of the flange once the various constituent parts of the cell have been introduced into the interior of the casing.
However, the introduction of the electrochemical components of the cell, such as the electrolyte, can lead to the said internal surface of the flange becoming contaminated or wetted with some of the said components and these materials can interfere with the formation of a good seal between the cover and the can or casing of the cell.
The present invention aims to overcome this disadvantage by providing an electrochemical cell in which the upper ends of the walls of the casing or can are formed into a peripheral flange which is turned inwardly of the perimeter defined by the walls of the can or casing.
Accordingly the present invention provides an electrochemical cell comprising a can or casing for housing the components of the cell and a cover which is sealed to the can or casing, and wherein the upper edges of the walls of the can or casing are turned inwardly to form an inwardly-directed flange to which the cover is sealed.
in order to produce an electrochemical cell in accordance with the present invention, one first introduces the various required constituents of the cell into a suitably dimensioned can or casing which has walls with upper ends which are free of flanges. Having inserted the said constituents into the interior of the casing, the filled casing is then subjected to a metal forming process whereby the upper ends of the walls of the casing or can are caused to form an inwardly-directed flange, and thereafter the cover is sealed to the upper (internal) surface of the flange so formed.
Conventional metal forming processes are used to form the inwardly-directed flange on the cell casing. Typically the can is rotated at speed about its longitudinal axis while a series of different metal forming tools are brought to bear in sequence against the upper portion of the wall of the casing, generally perpendicular thereto, thereby to cause a gradual transition of the said upper portion of the casing wall from a vertical to a substantially horizontal disposition.
By proceeding in this manner, the inwardly oriented flange formed on the can or casing provides a planar sealing surface which remains free of undesired contamination by the chemical components of the cell and to which the cover can be reliably and hermetically sealed to give a good seal between the cover and the can or casing.
The cover may be sealed to the can or casing by any suitable technique. Typically, depending on the nature of the cover and the can, it may be possible to use a welding technique such as gas welding, laser beam welding, ion beam welding ultrasonic welding or friction welding; or to use as a sealant a cold- or hot- curing polymer such as a polyester or polyacrylonitrile, an impact adhesive; or a fusible polymeric material such as the hot-melt adhesives described in our European
Patent Publication No. 0081339, for example ionomer resins such as the polymer sold under the name "Surlyn",; copolymers of ethylene and acrylic acid; and terpolymers of ethylene, acrylic acid and an acrylic ester such as the polymer sold under the name "Kuroplast" by BASF.Preferred copolymers of ethylene and acrylic acid contain up to 15% by weight of acrylic acid-a particularly preferred copolymer of this type is sold by DuPont as
EAA and contains 8% by weight acrylic acid.
The method chosen to seal the cover to the can or casing will primarily depend on the nature of the cover, on the material of the can or casing and on whether the cover is required to be electrically insulated from the can or casing.
Typically, the can or casing of the cell is either of cylindrical cross-section or has a cross-sectional shape which is a rectangle with rounded corners.
In one embodiment of the cell of the present invention, the cell further includes a support structure in the interior of the cell which acts as a support to aid the formation of the inwardly-directed flange. Suitably, the support structure is a plastics, metal or ceramic ring or plate located immediately below that portion of the can wall which is to be formed into the inwardly-directed flange.
The present invention will now be illustrated, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a side elevation, shown in section, of an electrochemical cell in accordance with the present invention, and
Figures 2 and 3 are side-elevations, shown in part only, of alternative embodiments of an electrochemical cell in accordance with the present invention.
In the drawings, like reference numerals refer to like parts.
Referring to Fig. 1, in a typical cell of the invention, a cylindrical can 2 with a central aperture 4 in its base 6 is formed from a
metal, typically aluminium. One electrode of
the cell takes the form of a pin 8, suitably of
brass, having a diameter smaller than that of
the aperture 4. The pin is welded to a metal
plate 10, typically of nickel plated steel, hav
ing a radius smaller than that of the can. This
plate acts as the negative cell terminal. A disc
12 of a composite sealing material of the type
described in our European Patent Publication
No. 0081339 typically a copolymer of ethy
lene and 8% acrylic acid having an interlayer
of woven glass fibre, of a slightly smaller
radius than the cylindrical can is cut and
placed over the outside of the base of the can.
The pin 8 is driven through the disc 12 of
sealing material into the aperture 4 until the
plate 10 adjoins the disc 12 and is located
centrally within the can as shown. To ensure
sealing of the aperture 4 in the base 6, the base of the can is heated to 2Q0 C and
subjected to a pressure of 4.14 bars (60 psi)
to melt and adhere the ethylene copolymer of
the sealing material to the plate 10 and to the
base 6 of the can. During heat sealing some of the copolymer flows into the aperture 4
around the pin 8 and ensures that the plate
10 and the pin 8 are joined to, but electrically
insulated from, the base of the can.
In conventional manner, a lithium anode ì and MnO2/graphite cathode are deposited on
current collectors of metallic mesh and are
separted by a suitable separator material, typi
cally microporous polypropylene. This as
sembly is wound into a spiral 14 with the cathod layer outermost. The spiral is inserted
into the can through its open end so that the
lithium anode current collector makes contact
with the pin 8. Electrolyte, suitably lithium
perchlorate dissolved in a mixture of propy lene carbonate and dimethoxyethane, is added
to the can and an insulator disc 16 is inserted
into the can above the spiral 14 ensuring that
a metal tab 22 connected to the manganese
dioxide/graphite current collector is allowed to protrude through an aperture in the insula
tor disc 16.Thereafter, the can 2 with its
contents is subjected to a metal forming pro
cess which results in the upper ends of the
walls of the can being caused to form a plantar, horizontal inwardly-directed flange 24.
Typically, for a can of a diameter of 22mm
the metal forming process consists of rotating
the can at 500 r.p.m. about its vertical axis
while exerting inward pressure on the edge of the can with a forming tool.
The inwardly-directed flange is formed by
using a conventional metal-forming technique
which comprises applying sequentially a num
ber of different forming tools to the upper portion of the wall of the casing, in a direction
perpendicular thereto, while rotating the can,
thereby causing a gradual transformation of
the upper portion of the casing wall into the
required inwardly-directed flange 24.
The free end of the tab 22 is then welded to the lower face of a circular flat disc 20 which is used to cover the can and which acts as the cathode. The cover 20 for the can, typically of aluminium having an inner layer of a hot-melt adhesive laminated thereto, is sealed on to the can by fusing the hot-melt adhesive. If desired, the cell may be surrounded by a decorative outer jacket (not shown).
Fig. 2 illustrates an alternative cell which is in almost all respects identical with the cell of
Fig. 1. In the alternative cell the cover 26 instead of being a flat disc is shaped into a contact dome 28 to which the tab 22 is welded.
In the embodiments illustrated in Figs. 1 and 2 the cover of the cell is not electrically insulated from the can. However, if it is desired to obtain a cell in which the cover and casing are electrically insulated from one another, as shown more clearly in Fig. 3, one may incorporate a layer 30 of insulating material between the cover and the casing.
The insulating material used when sealing either the top or the bottom of the cell casing or can, may be in the form of a fibrous material, typically with a hot-melt adhesive of the type described above partially absorbed between the fibres of the fibrous material.
Such a fibrous material may usefully take the form of a woven material for greater strength.
Examples of suitable fibrous insulating materials are glass fibre, a polyester, or a polyamide such as Nylon. A preferred insulating material of this type is woven glass fibre.
Preferably the thickness of the insulating material is less than 0.05 mm.
In a preferred arrangement, a composite sealing gasket may be used consisting of a layer of the said fibrous material impregnated with the hot-melt adhesive, the fibrous material being sandwiched between an upper layer and a lower layer of hot-melt adhesive material.
Although the specific embodiments described above have been described with particular reference to a lithium/manganese dioxide electrochemical system, the present invention is equally applicable to cells incorporating other electro-chemical systems.
For example, a rechargeable nickel-cadmium cell may be made in a can of nickelplated steel foil. After the contents of the cell have been introduced into the can, the upper ends of the can walls are subjected to a metalforming process to turn them inwardly to form a horizontal inwardly-directed flange to which a cover can be hermetically sealed. In this particular arrangement the cover is electrically insulated from the can; and suitably a gasket sealing element which will seal and insulate the cover and the can is used. For example, the gasket sealing element may consist of a fibrous substrate of Nylon which acts as the required insulating material impregnated with a polyamide hot-melt adhesive material as the required sealing material. A suitable sealing material is polyamide hot-melt adhesive sold under the name "Versamide". Sealing of the gasket element is achieved by bringing together the cover, the can and the sealing element at 1 80 C and applying a suitable pressure to the areas to be sealed.
Claims (14)
1. An electrochemical cell comprising a can or casing for housing the components of the cell and a cover which is sealed to the can or casing, and wherein the upper edges of the walls of the can or casing are turned inwardly to form an inwardly-directed flange to which the cover is sealed.
2. A cell according to Claim 1, wherein the can or casing is of cylindrical cross-section.
3. A cell according to Claim 1, wherein the cross-sectional shape of the can or casing is a rectangle with rounded corners.
4. A cell according to Claim 1, 2 or 3, further including a support structure within the can or casing to aid the formation of the inwardly-directed flange.
5. A cell according to Claim 4, wherein the support structure is a plastics, metal or ceramic ring or plate located below that portion of the can or casing which is to be formed into the inwardly-directed flange.
6. A cell according to any one of the preceding claims, wherein the cover is sealed to the can or casing with a hot melt adhesive, or an impact adhesive.
7. A cell according to any one of the preceding claims, wherein the cover is electri cally insulated from the can or casing.
8. An electrochemical cell substantially as hereinbefore described with reference to the accompanying drawings.
8. An electrochemical cell substantially as hereinbefore described with reference to the accompanying drawings.
9. A method of forming a sealed electrochemical cell, which method comprises introducing the contents of the cell into a metal can or casing, subjecting the upper edges of the walls of the metal can or casing to a metal-forming process to produce an inwardly directed flange and sealing a cover for the cell to the said flange to seal the cell contents within the cell.
10. A method according to Claim 9, wherein the metal forming process comprises axially rotating the cell and its contents while applying inwardly-directed pressure to the upper edges of the walls of the can or casing.
11. A method according to Claim 9 or 10, wherein the cover is sealed to the can or casing using a hot-melt adhesive or an impact adhesive.
12. A method according to Claim 9, 10 or 11, wherein the cover is sealed to the can or casing in the presence of a material which provides electrical insulation between the cover and the can or casing.
13. A method according to Claim 12, wherein the said electrically-insulating material is of glass fibre.
14. A method of forming a sealed electrochemical cell substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08403438A GB2154049A (en) | 1984-02-09 | 1984-02-09 | Electrochemical cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08403438A GB2154049A (en) | 1984-02-09 | 1984-02-09 | Electrochemical cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8403438D0 GB8403438D0 (en) | 1984-03-14 |
| GB2154049A true GB2154049A (en) | 1985-08-29 |
Family
ID=10556340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08403438A Withdrawn GB2154049A (en) | 1984-02-09 | 1984-02-09 | Electrochemical cell |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2154049A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2472644A1 (en) * | 2010-12-28 | 2012-07-04 | GS Yuasa International Ltd. | Electric storage device |
| US8632912B2 (en) | 2011-04-14 | 2014-01-21 | Gs Yuasa International Ltd. | Battery including baffling member and sealing material that seals auxiliary terminal to lid plate |
| US8748034B2 (en) | 2011-04-14 | 2014-06-10 | Gs Yuasa International Ltd. | Battery including baffling member including one of projecting portion and recessed portion extending from lid plate |
| US8765293B2 (en) | 2010-12-28 | 2014-07-01 | Gs Yuasa International Ltd. | Electric storage device |
| US8795882B2 (en) | 2010-12-10 | 2014-08-05 | Gs Yuasa International Ltd. | Battery |
| US10714715B2 (en) | 2011-01-20 | 2020-07-14 | Gs Yuasa International Ltd. | Electric storage device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449318A (en) * | 2018-10-15 | 2019-03-08 | 大连中比动力电池有限公司 | A kind of cylindrical battery configuration and preparation method of non-metal shell |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2032680A (en) * | 1978-09-30 | 1980-05-08 | Varta Batterie | Galvanic cell |
| GB2032679A (en) * | 1978-10-26 | 1980-05-08 | Berec Group Ltd | Improvements in or relating to electrical button cells |
| GB1590005A (en) * | 1976-10-01 | 1981-05-28 | Duracell Int | Electrochemical cells |
| GB2101393A (en) * | 1981-05-22 | 1983-01-12 | Berec Group Ltd | Electrical cell |
| GB2109622A (en) * | 1981-10-26 | 1983-06-02 | Duracell Int | Air-depolarized button cells |
-
1984
- 1984-02-09 GB GB08403438A patent/GB2154049A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1590005A (en) * | 1976-10-01 | 1981-05-28 | Duracell Int | Electrochemical cells |
| GB2032680A (en) * | 1978-09-30 | 1980-05-08 | Varta Batterie | Galvanic cell |
| GB2032679A (en) * | 1978-10-26 | 1980-05-08 | Berec Group Ltd | Improvements in or relating to electrical button cells |
| GB2101393A (en) * | 1981-05-22 | 1983-01-12 | Berec Group Ltd | Electrical cell |
| GB2109622A (en) * | 1981-10-26 | 1983-06-02 | Duracell Int | Air-depolarized button cells |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8795882B2 (en) | 2010-12-10 | 2014-08-05 | Gs Yuasa International Ltd. | Battery |
| EP2472644A1 (en) * | 2010-12-28 | 2012-07-04 | GS Yuasa International Ltd. | Electric storage device |
| US8598471B2 (en) | 2010-12-28 | 2013-12-03 | Gs Yuasa International Ltd. | Electric storage device |
| US8765293B2 (en) | 2010-12-28 | 2014-07-01 | Gs Yuasa International Ltd. | Electric storage device |
| US9685643B2 (en) | 2010-12-28 | 2017-06-20 | Gs Yuasa International Ltd. | Electric storage device |
| US10714715B2 (en) | 2011-01-20 | 2020-07-14 | Gs Yuasa International Ltd. | Electric storage device |
| US8632912B2 (en) | 2011-04-14 | 2014-01-21 | Gs Yuasa International Ltd. | Battery including baffling member and sealing material that seals auxiliary terminal to lid plate |
| US8748034B2 (en) | 2011-04-14 | 2014-06-10 | Gs Yuasa International Ltd. | Battery including baffling member including one of projecting portion and recessed portion extending from lid plate |
| US9118051B2 (en) | 2011-04-14 | 2015-08-25 | Gs Yuasa International Ltd. | Battery and method of manufacturing the same |
| US9379372B2 (en) | 2011-04-14 | 2016-06-28 | Gs Yuasa International Ltd. | Battery and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8403438D0 (en) | 1984-03-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |