WO1996002072A1 - A battery formed of stacked flat cells - Google Patents

A battery formed of stacked flat cells Download PDF

Info

Publication number
WO1996002072A1
WO1996002072A1 PCT/DK1995/000295 DK9500295W WO9602072A1 WO 1996002072 A1 WO1996002072 A1 WO 1996002072A1 DK 9500295 W DK9500295 W DK 9500295W WO 9602072 A1 WO9602072 A1 WO 9602072A1
Authority
WO
WIPO (PCT)
Prior art keywords
tray
battery
trays
edge
lib
Prior art date
Application number
PCT/DK1995/000295
Other languages
French (fr)
Inventor
Jørgen DAUGAARD
Original Assignee
Alkaline Batteries A/S
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 Alkaline Batteries A/S filed Critical Alkaline Batteries A/S
Priority to US08/765,060 priority Critical patent/US5691079A/en
Publication of WO1996002072A1 publication Critical patent/WO1996002072A1/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
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/42—Grouping of primary cells into batteries
    • H01M6/46—Grouping of primary cells into batteries of flat cells
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/4911—Electric battery cell making including sealing

Definitions

  • the invention relates to a battery formed of stacked flat cells comprising an electro ⁇ chemical battery system having an anode and a cathode, the casings of said cells being formed of upwardly open plastic trays stacked to form a unit, the upwardly facing edge of a subjacent tray in the stack being sealingly connected with a circum ⁇ ferential edge portion of the bottom of the superjacent tray along the entire peri ⁇ phery, the upper edges of the trays and the circumferential edge portions of the bottom having essentially complementary guiding and joining faces.
  • Plastic cells may be fused together by immersing cells pressed against each other in a solvent, such alcohol, confer e.g. German patent No. 900.958.
  • Danish patent application No. 2661/81 discloses a battery of the above type having complementary guiding and joining faces and provided with a plurality of circumferential cavities adapted to stop any leaking of electrolyte fluid.
  • the fused layer thus being fairly thin and sensitive to wearing during the assembly process and to formation of pressure in the stack of cells usually containing an alkaline electrolyte. It is extremely important that the stack remains tight, as the alkaline electrolyte possesses a considerable leakage ability.
  • the alkaline electrolyte is an aggressive medium which will damage the equipment, in which the battery is mounted, if the battery leaks.
  • a battery of the above type is characterised in that the circumferential edge portion in the bottom of the tray and/or the upper edge of the tray is provided with fluid permeable means (such as a rough surface, ridges, grooves or the like roughness suitable to form a small gap between the joining faces) to facilitate intrusion of the solvent by capillary effect at joining of the trays.
  • fluid permeable means such as a rough surface, ridges, grooves or the like roughness suitable to form a small gap between the joining faces
  • the vertical inner faces of the tray are provided with fluid permeable means in a band along the upper edge of the faces and/or along the vertical outer faces of the circumferential edge portion in the guiding faces of the bottom.
  • the fluid permeable means are preferably formed as ridges, grooves or channels defined by ridges, preferably in such a manner that narrow grooves or channels, having a width of approximately 0.2 mm and a depth of approximately 0.06 mm, are formed between the ridges.
  • the grooves or ridges on the vertical faces are preferably arranged opposite the corresponding ridges or grooves on the horizontal portion of the circumferential bottom edge portion of the tray and/ or on the horizontal portion of the upper edge of the tray.
  • the fluid permeable means coact with one or more essentially circumferential cavities acting as interference for the capillary effect and thus forming a barrier for the solvent intruding from the outside as well as for the electrolyte fluid in the interior of the tray.
  • the invention relates to a method as defined in claim 10 for joining the trays to form a completely sealed stack.
  • Fig. 1 illustrates a stackable flat cell in a bottom view
  • Fig. 2 is a vertical sectional view through the above embodiment along the line II-II in Fig. 1,
  • Fig. 3 is a vertical sectional view through the above embodiment along the line III-III in Fig. 1,
  • Fig. 4 shows a detail of Fig. 2
  • Fig. 5 is a sectional view along the line V-V in Fig. 4, seen in the direction of the arrow,
  • Fig. 6 is a side view of the flat cell in Fig. 1,
  • Fig. 7 shows a detail of Fig. 6,
  • Fig. 8 is a sectional view through the wall of the flat cell as defined by the broken line and the arrows A- A.
  • Fig. 9 shows a stack of trays. For the sake of simplification, only two trays are shown.
  • the stackable flat cell shown in Fig. 1 which may contain a zinc anode, an alkaline electrolyte and a manganese dioxide cathode, is provided with a casing formed of an upwardly open plastic tray 10.
  • the plastic trays 10 are preferably made of a plastic type permeable for hydrogen without being permeable for oxygen, nitrogen or carbon dioxide.
  • the plastic trays may be stacked to form a unit, as shown in Fig. 9, the upwardly facing edge of a subjacent tray 10 being connected with a circum ⁇ ferential edge portion 12 of the bottom of the superjacent tray 10 along the entire periphery, the upper edge of the trays and the circumferential edge portions 12 of 5 the bottom being essentially complementary - confer Fig. 1.
  • ridges or grooves are formed providing gaps, preferably small gaps of capillary dimensions, facilitating a intrusion of the solvent.
  • a total of sixty ridges 20 are separated by narrow gaps 21 having a width of approximately 0.2 mm and a depth of approximately 0.06 mm, as shown in Fig. 5 and 7, providing well-defined gaps between two stacked trays ensuring that a solvent intrudes between the surfaces denoted by the reference numerals 11a and 12a.
  • said ridges 20 in the bottom edge 12a coact with corresponding vertical ridges 30 arranged in a band lib adjoining the upper edge 11a of the tray, (said ridges 30 comprising twenty ridges on each long side and ten on each of the short sides), on the four inner faces lib of each tray 10, allowing the solvent to continue the intrusion further down along the inner face of the tray in the thus formed gaps
  • the adhesive area is larger than in known battery trays, as it comprises the horizontal upper edge 11a of the tray bound to the horizontal, circumferential edge 12a around the bottom of the superjacent tray, and further of the essentially 25 circumferential band lib on the inner face of the upper edge of the tray bound to the essentially circumferential band 12b on the outer face of the bottom of the superjacent tray.
  • the edge surface 12a forms an angle relative to the horizontal upper edge surface or vice versa, whereby a wedge-shaped gap 14 is provided, the uppermost edge 11a of a tray only abutting the circumferential edge 12a of the bottom of a superjacent tray at the bottom of the wedge-shaped gap as shown at the reference numeral 14a.
  • This gap helps to ensure that the solvent may intrude between the trays, where it partially dissolves the surfaces 11a, lib and 12a, 12b of the walls of the tray, said faces thus being fused together as the solvent evaporates.
  • the wedge-shaped gap 14 preferably forms an angle in the order of 10° and most preferably 10.3°. Without the new ridges or grooves according to the invention, the fusion described would tend to only take place in the joining area 14a between the faces 11a and 12a, and the resulting stack would be more fragile and more liable to leak.
  • FIG. 2 An essentially circumferential groove 15 on the inner face of tray is shown in Fig. 2,3 and 4, Fig. 4 being an enlarged sectional view.
  • the groove 15 and the circum- ferential bottom guiding face of the superjacent cell form an essentially circum ⁇ ferential cavity of a preferably triangular cross section.
  • a cavity of this type acts as an interference for a capillary effect, whereby e.g. the further intrusion of the solvent is stopped.
  • the solvent reaches the interior of the tray, since the tray together with an anode, a cathode, in particular a zinc anode, an alkaline electrolyte and a manganese dioxide cathode shall form a cell in a battery.
  • one or more cavities of the above type may be adapted to act as an absorbing cavity for any leaking electrolyte fluid during the fusion process per se, i.e. while the loosely stacked cells, which are not fused together, are submerged in the solvent and subsequently withdrawn a number of times. During this process, it is essential to avoid that the electrolyte fluid leaks as it will tend to adhere to the surfaces to be fused, thereby deteriorating the fusion.
  • an essentially circum ⁇ ferential ridge 16 is provided abutting the inclined, bevelled edge of the bottom, when the trays are stacked, thereby providing sealing of the electrolyte cell.
  • the vertical channels or grooves and optionally the cavities may be provided in the bottom circumferential guiding face 12b.
  • the fusion is subsequently made by immersing one or more stacks of flat cells one or several times in a vessel containing a solvent, for instance "THF" i.e. tetrahydrofiiran, during which the solvent intrudes the wedge-shaped gap 14 and due to the ridges or grooves 21, 31 further into and preferably so deeply that an essentially circum ⁇ ferential band on the inner faces lib and the guiding faces 12b are covered by solvent.
  • a solvent for instance "THF" i.e. tetrahydrofiiran
  • the stacks of flat cells are immersed a few periods of time, each lasting from two to eight seconds.
  • ridges or roughness may be provided for the opposite, complementary faces, the edge 11a and the guiding face 12b, and it is within the scope of the invention to use the described cells with other electrochemical battery systems, such as NiCd.

Abstract

The invention relates to a battery formed of stacked flat cells comprising an anode and a cathode, e.g. comprising a zinc anode, an alkaline electrolyte and a manganese dioxide carbon cathode, the casings of said cells being formed of upwardly open plastic trays (10) stacked to form a unit, the upwardly facing edge (11a, 11b) of a subjacent tray in the stack being sealingly connected with a circumferential edge portion (12a, 12b) of the bottom of the superjacent tray along the entire periphery, the upper edges (11a) of the trays (10) and the circumferential edge portions (11b) thereof coacting with complementary guiding and joining faces (12a, 12b) in the bottom of the superjacent tray. The circumferential edge portion (12a) in the bottom and/or the upper edge (11a) of the tray (10) is provided with fluid permeable means to facilitate intrusion of the solvent by capillary effect at fusion of the trays. As a result, an improved intrusion of solvent is obtained, which ensures an improved fusion of the trays than hitherto known, and consequently a completely tight battery.

Description

A battery formed of stacked flat cells
Technical Field
The invention relates to a battery formed of stacked flat cells comprising an electro¬ chemical battery system having an anode and a cathode, the casings of said cells being formed of upwardly open plastic trays stacked to form a unit, the upwardly facing edge of a subjacent tray in the stack being sealingly connected with a circum¬ ferential edge portion of the bottom of the superjacent tray along the entire peri¬ phery, the upper edges of the trays and the circumferential edge portions of the bottom having essentially complementary guiding and joining faces.
Background Art
Plastic cells may be fused together by immersing cells pressed against each other in a solvent, such alcohol, confer e.g. German patent No. 900.958.
Danish patent application No. 2661/81, further, discloses a battery of the above type having complementary guiding and joining faces and provided with a plurality of circumferential cavities adapted to stop any leaking of electrolyte fluid.
It is, however, difficult to obtain an effective fusion of the cells, as these typically only are fused in the outermost surface, the fused layer thus being fairly thin and sensitive to wearing during the assembly process and to formation of pressure in the stack of cells usually containing an alkaline electrolyte. It is extremely important that the stack remains tight, as the alkaline electrolyte possesses a considerable leakage ability. The alkaline electrolyte is an aggressive medium which will damage the equipment, in which the battery is mounted, if the battery leaks.
Brief Description of the Invention
According to the invention, a battery of the above type is characterised in that the circumferential edge portion in the bottom of the tray and/or the upper edge of the tray is provided with fluid permeable means (such as a rough surface, ridges, grooves or the like roughness suitable to form a small gap between the joining faces) to facilitate intrusion of the solvent by capillary effect at joining of the trays. Accordingly, improved solvent intrusion is obtained as well as increased contact area available for joining two trays than if the surfaces had been smooth. As a result, an increased minimum wall thickness of the fused stack is obtained and thus a product being ensured against leaking of electrolyte fluid is obtained.
Preferably, in order to enhance the intrusion of solvent by capillary effect at fusion of the trays, the vertical inner faces of the tray are provided with fluid permeable means in a band along the upper edge of the faces and/or along the vertical outer faces of the circumferential edge portion in the guiding faces of the bottom. The fluid permeable means are preferably formed as ridges, grooves or channels defined by ridges, preferably in such a manner that narrow grooves or channels, having a width of approximately 0.2 mm and a depth of approximately 0.06 mm, are formed between the ridges.
The grooves or ridges on the vertical faces are preferably arranged opposite the corresponding ridges or grooves on the horizontal portion of the circumferential bottom edge portion of the tray and/ or on the horizontal portion of the upper edge of the tray.
It is preferable that the fluid permeable means coact with one or more essentially circumferential cavities acting as interference for the capillary effect and thus forming a barrier for the solvent intruding from the outside as well as for the electrolyte fluid in the interior of the tray.
Moreover, the invention relates to a method as defined in claim 10 for joining the trays to form a completely sealed stack.
Brief Description of the Drawings. The invention is explained in details in the following based on a preferred em¬ bodiment and with reference to the drawings, in which
Fig. 1 illustrates a stackable flat cell in a bottom view,
Fig. 2 is a vertical sectional view through the above embodiment along the line II-II in Fig. 1,
Fig. 3 is a vertical sectional view through the above embodiment along the line III-III in Fig. 1,
Fig. 4 shows a detail of Fig. 2,
Fig. 5 is a sectional view along the line V-V in Fig. 4, seen in the direction of the arrow,
Fig. 6 is a side view of the flat cell in Fig. 1,
Fig. 7 shows a detail of Fig. 6, and
Fig. 8 is a sectional view through the wall of the flat cell as defined by the broken line and the arrows A- A.
Fig. 9 shows a stack of trays. For the sake of simplification, only two trays are shown.
Best Mode for Carrying Out the Invention.
The stackable flat cell shown in Fig. 1, which may contain a zinc anode, an alkaline electrolyte and a manganese dioxide cathode, is provided with a casing formed of an upwardly open plastic tray 10. The plastic trays 10 are preferably made of a plastic type permeable for hydrogen without being permeable for oxygen, nitrogen or carbon dioxide. The plastic trays may be stacked to form a unit, as shown in Fig. 9, the upwardly facing edge of a subjacent tray 10 being connected with a circum¬ ferential edge portion 12 of the bottom of the superjacent tray 10 along the entire periphery, the upper edge of the trays and the circumferential edge portions 12 of 5 the bottom being essentially complementary - confer Fig. 1.
According to the invention, in the circumferential edge portion 12 in the bottom of the tray (and/or optionally in the upper edge of each tray) ridges or grooves are formed providing gaps, preferably small gaps of capillary dimensions, facilitating a intrusion of the solvent.
10 In a preferred embodiment, a total of sixty ridges 20 are separated by narrow gaps 21 having a width of approximately 0.2 mm and a depth of approximately 0.06 mm, as shown in Fig. 5 and 7, providing well-defined gaps between two stacked trays ensuring that a solvent intrudes between the surfaces denoted by the reference numerals 11a and 12a.
15 Preferably, said ridges 20 in the bottom edge 12a coact with corresponding vertical ridges 30 arranged in a band lib adjoining the upper edge 11a of the tray, (said ridges 30 comprising twenty ridges on each long side and ten on each of the short sides), on the four inner faces lib of each tray 10, allowing the solvent to continue the intrusion further down along the inner face of the tray in the thus formed gaps
20 31 between the inner face 11a of a tray 10 and the outer face 12b of the bottom of the superjacent tray.
As a result, the adhesive area is larger than in known battery trays, as it comprises the horizontal upper edge 11a of the tray bound to the horizontal, circumferential edge 12a around the bottom of the superjacent tray, and further of the essentially 25 circumferential band lib on the inner face of the upper edge of the tray bound to the essentially circumferential band 12b on the outer face of the bottom of the superjacent tray. Preferably, the edge surface 12a forms an angle relative to the horizontal upper edge surface or vice versa, whereby a wedge-shaped gap 14 is provided, the uppermost edge 11a of a tray only abutting the circumferential edge 12a of the bottom of a superjacent tray at the bottom of the wedge-shaped gap as shown at the reference numeral 14a. This gap helps to ensure that the solvent may intrude between the trays, where it partially dissolves the surfaces 11a, lib and 12a, 12b of the walls of the tray, said faces thus being fused together as the solvent evaporates. The wedge-shaped gap 14 preferably forms an angle in the order of 10° and most preferably 10.3°. Without the new ridges or grooves according to the invention, the fusion described would tend to only take place in the joining area 14a between the faces 11a and 12a, and the resulting stack would be more fragile and more liable to leak.
An essentially circumferential groove 15 on the inner face of tray is shown in Fig. 2,3 and 4, Fig. 4 being an enlarged sectional view. The groove 15 and the circum- ferential bottom guiding face of the superjacent cell form an essentially circum¬ ferential cavity of a preferably triangular cross section. A cavity of this type acts as an interference for a capillary effect, whereby e.g. the further intrusion of the solvent is stopped. Clearly, it is not desirable that the solvent reaches the interior of the tray, since the tray together with an anode, a cathode, in particular a zinc anode, an alkaline electrolyte and a manganese dioxide cathode shall form a cell in a battery. Further, one or more cavities of the above type may be adapted to act as an absorbing cavity for any leaking electrolyte fluid during the fusion process per se, i.e. while the loosely stacked cells, which are not fused together, are submerged in the solvent and subsequently withdrawn a number of times. During this process, it is essential to avoid that the electrolyte fluid leaks as it will tend to adhere to the surfaces to be fused, thereby deteriorating the fusion.
Preferably, on the inner face of the lateral walls of the tray, an essentially circum¬ ferential ridge 16 is provided abutting the inclined, bevelled edge of the bottom, when the trays are stacked, thereby providing sealing of the electrolyte cell. In an alternative embodiment, the vertical channels or grooves and optionally the cavities may be provided in the bottom circumferential guiding face 12b.
When a battery is formed by stacking the desired number of flat cells, the fusion is subsequently made by immersing one or more stacks of flat cells one or several times in a vessel containing a solvent, for instance "THF" i.e. tetrahydrofiiran, during which the solvent intrudes the wedge-shaped gap 14 and due to the ridges or grooves 21, 31 further into and preferably so deeply that an essentially circum¬ ferential band on the inner faces lib and the guiding faces 12b are covered by solvent. Typically, the stacks of flat cells are immersed a few periods of time, each lasting from two to eight seconds. During such an immersion, it is advantageous to subject the vessel containing the solvents and the immersed stacks of flat cells to ultrasound, either for part of the immersion period or for the entire immersion period. As a result, a tight and durable fusion between the individual flat cells is obtained. By using ultrasound, it is ensured to a greater extent that the solvent intrudes in the manner described and thus provides tight and strong fusions.
It is obvious that the above invention may be varied in many ways. The ridges or roughness may be provided for the opposite, complementary faces, the edge 11a and the guiding face 12b, and it is within the scope of the invention to use the described cells with other electrochemical battery systems, such as NiCd.

Claims

Claims.
1. A battery formed of stacked flat cells comprising an electrochemical battery system having an anode and a cathode, the casings of said cells being formed of upwardly open plastic trays (10) stacked to form a unit, the upwardly facing edge (11a) of a subjacent tray (10) in the stack being sealingly connected with a circum¬ ferential edge portion (12a) of the bottom of the superjacent tray along the entire periphery, the upper edges (11a, lib) of the trays (10) and the circumferential edge portions (12a, 12b) thereof in the bottom having essentially complementary guiding and joining faces (11a, 12a, lib, 12b), characterised in that the circum- ferential edge portion (12a) in the bottom of the tray and/or the upper edge (11a) of the tray (10) is provided with fluid permeable means to facilitate intrusion of the solvent by capillary effect at fusion of the trays.
2. A battery as claimed in claim 1, c ha racte ri s ed in that fluid permeable means are provided at the vertical inner faces (lib) of the tray in a band along the upper edge (11a) and/or at the vertical outer faces (12b) of the circumfe¬ rential edge portion in the guiding faces of the bottom to facilitate intrusion of the solvent by capillary effect at fusion of the trays.
3. A battery as claimed in claim 1 or 2, characterised in that the fluid permeable means are formed as grooves, ridges or channels defined by ridges, preferably narrow ridges of a width of approximately 0.2 mm and a depth of approximately 0.06 mm.
4. A battery as claimed in claim 3, characterised in that the vertical grooves or channels on the inner faces (lib, 12b) are arranged opposite and connec¬ ted with the grooves, ridges or channels on the circumferential edge portion (12a) in the bottom and/or on the upper edge (11a) of the tray (10).
5. A battery as claimed in claim 1 or 2, characterised in that the fluid permeable means are provided by a roughness in the surfaces.
6. A battery as claimed in one or more of the preceding claims, charac¬ terised in that the upwardly facing edge (11a) of a tray (10) and the correspon¬ ding edge (12a) of the bottom of a superjacent tray (10) form a wedge-shaped gap (14).
5 7. A battery as claimed in one or more of the preceding claims, charac¬ terised in that the fluid permeable means co-act with one or several essentially circumferential cavities (15) provided in the inner faces of (lib) of the tray (10) and/or the outer faces (12b) of the bottom of the tray (10).
8. A battery as claimed in one or more of the preceding claims, charac- 10 t e r i s e d in that a circumferential ridge (16) is provided on the inner face (lib) of the tray and adapted to coact with the circumferential edge of the bottom of the tray.
9. A battery as claimed in claim 6, characterised in that the wedge- shaped gap (14) forms an angle in the order of 10°.
15 10. A method of assembling a battery formed of stacked flat cells comprising an anode and a cathode, in particularly comprising a zinc anode, an alkaline electro¬ lyte and a manganese dioxide carbon cathode, the casings of said cells being formed of upwardly open plastic trays (10) stacked to form a unit, the upwardly facing edge (11a, lib) of a subjacent tray in the stack being sealingly connected with a circum- 0 ferential edge portion (12a, 12b) of the bottom of the superjacent tray along the entire periphery, the upper edges of the trays (10) and the circumferential edge portions (12) thereof coacting with complementary guiding and joining faces in the bottom of the superjacent tray, by which method a stack of flat cells is immersed in a vessel containing solvent, characterised in that the vessel containing 5 the solvent and the submerged stacks of flat cells are subjected to ultrasound for a part of the immersion period and preferably for the entire immersion period.
PCT/DK1995/000295 1994-07-08 1995-07-07 A battery formed of stacked flat cells WO1996002072A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/765,060 US5691079A (en) 1994-07-08 1995-07-07 Battery formed of stacked flat cells

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK082094A DK171248B1 (en) 1994-07-08 1994-07-08 Battery of stacked flat cells and method of assembling the battery
DK0820/94 1994-07-08

Publications (1)

Publication Number Publication Date
WO1996002072A1 true WO1996002072A1 (en) 1996-01-25

Family

ID=8097929

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000295 WO1996002072A1 (en) 1994-07-08 1995-07-07 A battery formed of stacked flat cells

Country Status (3)

Country Link
US (1) US5691079A (en)
DK (1) DK171248B1 (en)
WO (1) WO1996002072A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7355841B1 (en) 2000-11-03 2008-04-08 Cardiac Pacemakers, Inc. Configurations and methods for making capacitor connections
US6699265B1 (en) 2000-11-03 2004-03-02 Cardiac Pacemakers, Inc. Flat capacitor for an implantable medical device
US6571126B1 (en) 2000-11-03 2003-05-27 Cardiac Pacemakers, Inc. Method of constructing a capacitor stack for a flat capacitor
US6509588B1 (en) 2000-11-03 2003-01-21 Cardiac Pacemakers, Inc. Method for interconnecting anodes and cathodes in a flat capacitor
US6687118B1 (en) 2000-11-03 2004-02-03 Cardiac Pacemakers, Inc. Flat capacitor having staked foils and edge-connected connection members
US6833987B1 (en) 2000-11-03 2004-12-21 Cardiac Pacemakers, Inc. Flat capacitor having an active case
US6522525B1 (en) 2000-11-03 2003-02-18 Cardiac Pacemakers, Inc. Implantable heart monitors having flat capacitors with curved profiles
US6684102B1 (en) 2000-11-03 2004-01-27 Cardiac Pacemakers, Inc. Implantable heart monitors having capacitors with endcap headers
US6780539B2 (en) * 2002-02-21 2004-08-24 The Gillette Company Alkaline battery with flat housing
US7034441B2 (en) * 2002-11-13 2006-04-25 Nihon Dempa Kogyo Co., Ltd Surface mount crystal unit and surface mount crystal oscillator
US7479349B2 (en) 2002-12-31 2009-01-20 Cardiac Pacemakers, Inc. Batteries including a flat plate design
US7951479B2 (en) 2005-05-11 2011-05-31 Cardiac Pacemakers, Inc. Method and apparatus for porous insulative film for insulating energy source layers
US7224575B2 (en) 2004-07-16 2007-05-29 Cardiac Pacemakers, Inc. Method and apparatus for high voltage aluminum capacitor design
US20060247715A1 (en) * 2005-04-29 2006-11-02 Youker Nick A Method and apparatus for an implantable pulse generator with a stacked battery and capacitor
US7718027B2 (en) 2005-05-11 2010-05-18 Cardiac Pacemakers, Inc. Method and apparatus for concurrent welding and excise of battery separator
US20080000882A1 (en) * 2006-06-01 2008-01-03 Vanderlick Stephen W Method and apparatus for a foil to control heat flow from welding a device case
US7879488B2 (en) * 2006-08-28 2011-02-01 Cardiac Pacemakers, Inc. Apparatus and method for a power source casing with a stepped bevelled edge
DE102012000048A1 (en) * 2012-01-03 2013-07-04 Li-Tec Battery Gmbh Energy storage device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677716A (en) * 1950-04-19 1954-05-04 Gen Dry Batteries Inc Dry cell battery
US2889389A (en) * 1954-05-18 1959-06-02 Pentti J Tamminen Galvanic battery of the flat cell type and method of producing the same
DE2945996C2 (en) * 1978-11-28 1983-11-10 Aktieselskabet Hellesens, Soeborg battery

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE266181C (en) *
US2658936A (en) * 1949-01-19 1953-11-10 Gen Dry Batteries Inc Dry cell battery
US2774806A (en) * 1953-06-12 1956-12-18 Union Carbide & Carbon Corp Primary battery
US2820081A (en) * 1953-06-12 1958-01-14 Union Carbide Corp Primary galvanic battery and method of making same
US3907599A (en) * 1974-06-10 1975-09-23 Polaroid Corp Flat battery
US4203202A (en) * 1978-02-23 1980-05-20 Akimov Boris V Method of making standby primary current sources

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677716A (en) * 1950-04-19 1954-05-04 Gen Dry Batteries Inc Dry cell battery
US2889389A (en) * 1954-05-18 1959-06-02 Pentti J Tamminen Galvanic battery of the flat cell type and method of producing the same
DE2945996C2 (en) * 1978-11-28 1983-11-10 Aktieselskabet Hellesens, Soeborg battery

Also Published As

Publication number Publication date
US5691079A (en) 1997-11-25
DK82094A (en) 1996-01-09
DK171248B1 (en) 1996-08-05

Similar Documents

Publication Publication Date Title
US5691079A (en) Battery formed of stacked flat cells
KR100274559B1 (en) Packaging for an electrochemical device and device using same
US7749648B2 (en) Pouch for secondary battery, secondary battery using the same, and apparatus for sealing pouch cases of secondary battery
US8492025B2 (en) Pouch for battery and pouch type secondary battery
CN100517802C (en) Wafer alkaline cell
EP1135812B1 (en) Fuel cell with improved sealing between individual membrane assemblies and plate assemblies
JP2865424B2 (en) Diffusion vents for rechargeable metal-air batteries
US8148004B2 (en) Water-resistant pouch type secondary cell
EP0630066A1 (en) Bipolar battery
US20100112454A1 (en) Compliant seal structures for protected active metal anodes
CA1099335A (en) Vented flat battery
CA2573621C (en) Fuel cell assembly with structural film
WO2002061869A1 (en) High polymer electrolyte fuel cell and electrolyte film-gasket assembly for the fuel cell
CA2239862A1 (en) Method for the fabrication of electrochemical cells
JP4968505B2 (en) Fuel cell separator
JP4502135B2 (en) Fuel cell separator
US5712058A (en) Miniature galvanic cell having optimum internal volume for the active components
US4931368A (en) Vent liner and cover construction for galvanic cells
US20060292427A1 (en) Air cell with modified sealing tab
CA2483394A1 (en) Membrane based electrochemical cell stacks
WO1999040637A1 (en) Method of forming protective coating on cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate
EP1043783A4 (en) Nonaqueous electrolyte cell
US6033799A (en) Miniature galvanic cell having optimum internal volume for the active components
US6294283B1 (en) Electrochemical cell having low profile seal assembly
WO2004079839A2 (en) Sealing of multi-height surfaces

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): FI NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 08765060

Country of ref document: US

122 Ep: pct application non-entry in european phase