US3347710A - Method of making sealed electric batteries - Google Patents

Method of making sealed electric batteries Download PDF

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Publication number
US3347710A
US3347710A US468773A US46877365A US3347710A US 3347710 A US3347710 A US 3347710A US 468773 A US468773 A US 468773A US 46877365 A US46877365 A US 46877365A US 3347710 A US3347710 A US 3347710A
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United States
Prior art keywords
tube
cup
sealing
battery
metal
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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.)
Expired - Lifetime
Application number
US468773A
Inventor
Josef M Strobel
Haas Bernhard
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United States Time Corp
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United States Time Corp
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Publication of US3347710A publication Critical patent/US3347710A/en
Assigned to CHASE MANHATTAN BANK, N.A., THE reassignment CHASE MANHATTAN BANK, N.A., THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREDERIKSPLEIN HOLDING 1970 B.V., TIMEX CLOCK COMPANY, A DE CORP., TIMEX COMPUTERS LTD., A DE CORP., TIMEX CORPORATION, A DE CORP., TIMEX ENTERPRISES, INC., A BERMUDA CORP., TIMEX GROUP LTD., A BERMUDA CORP., TIMEX MEDICAL PRODUCTS LTD., A BERMUDA CORP., TIMEX N.V.
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Expired - Lifetime legal-status Critical Current

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    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H01M50/56—Cup shaped terminals
    • 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
    • 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

  • This invention is a method of sealing a battery to prevent gas and liquid leakage.
  • the battery consists of two metal open-ended cans or cups, one larger than the other, chemical battery material and a plastic tubular seal.
  • the invention relates to an electric primary cell or a storage battery and a process for its production.
  • the construction according to the present invention finds its application mainly in very small primary cells or storage batteries. Such batteries are used in wrist watches and hearing aids. The proper sealing of such very small cells has been diflicult and intricate.
  • an outer larger metal cup open at its top, has in its lower part a pill of chemically reactive material which is electrically connected with the bottom.
  • a second smaller metal cup open at its bottom has within it a second chemically reactive pill.
  • a plastic intermediate tube for insulation and sealing, is positioned between the two metal containers. The tube is under radial pressure, preferably over its entire length.
  • the construction avoids a crimping process.
  • the radial compressing of the tube between the two containers gives a simple and safe sealing of their contents.
  • the outside diameter of the intermediate plastic tube is larger than the inside diameter of the larger metal cup in order to obtain radial pressure on the tube.
  • this construction it is suflicient to press fit the single parts together to obtain the radial pressure on the tube and sealing.
  • the assembly and easing of the pills, containers and tube occurs in a vacuum.
  • the presence of empty spaces (an under pressure) has a favorable e-ifect because, when the outer sealing vacuum is ended, the tube and the cups are drawn into the interior.
  • FIG. 1 is a partially cut-away side view of -a battery ce-ll according to the present invention with the tube and bottom cup shown in sectional View;
  • FIG. 2 is a cross section taken through the intermediate plastic tube prior to its insertion between the containers.
  • the bottom metal cup (can or container) 10 includes a cylindrical shell 11, a shell bottom 12, and a top shoulder 13 on its outer edge.
  • a mesh metal disc 14 rests against the inside of the shell bottom 12.
  • Disc 14 in free condition is convexly curved (dome shaped), however, in assembled condition it adopts a plane shape, as shown in FIG. 1.
  • An inner chemically reactive pill 16 is positioned on top of the mesh metal disc 14.
  • An upper chemically reactive pill 18 is positioned in metal cup (container) 20.
  • separators 19 are provided between the pills 18 and 16.
  • An intermediate plastic tube 22 electrically insulates cup 20 from cup 10.
  • the wall thickness of the tube 22, according to the invention, is preferably smaller than 0.3 mm.
  • An advantageous construction results from a wall thickness of the intermediate tube of 0.2 mm.
  • the intermediate tube 22 has preferably a length of at least 44 mm. in order to obtain good sealing between the metal containers.
  • a particularly favorable plastic for the intermediate tube 22 is poly-tetra fluoro-ethylene (PTFE) such as Du Ponts Teflon T.M. It has high elasticity and provides very good insulation and sealing.
  • the intermediate tube 22 rests with its shoulder 24 against the top shoulder 13 of the metal cup 10.
  • Tube 22 in free condition (see FIG. 2), has a tapered outer rim 26 on its lower end and a tapered inner rim 28 on its upper end. Both these rims are no longer noticeable in FIG. 1 because the intermediate tube, after insertion between the containers is transformed and stretched. Seen in its entirety, the intermediate tube 22 after insertion is under stress in the longitudinal direction.
  • the parts are placed in a vacuum chamber with a vacuum of at least Torr. Then, the upper cup is pressed down into tube 22. The tube, with cup 20, is then pressed into cup 10. The intermediate tube is slightly stretched during the press fit of the inner can 18. The shell 11 of the metal cup 10 and the metal cup 20 exert radial pressure against the intermediate tube 22. This pressure causes the intermediate tube to be compressed and to remain under a continuous stress.
  • the cell may either be a primary cell or a storage battery depending upon the chemical materials used in pills 16 and 20.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electric Clocks (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Description

Oct 17, 1967 .1. M. STROBEL ETAL 3,347,710
METHOD OF MAKING SEALED ELECTRIC BATTERIES Filed July 1, 1965 J 20 Fig. 1 I w 2 19 T 16 I I 2e it 2 'if 22 Fig. 2
INVENTORS J OSEFM KOBEL BY @E/QVW/YRD #445 A 77a ems v; v
United States Patent ()fitice 3,347,710 Patented Oct. 17, 1967 U 2 Claims. (or. 136-175) ABSTRACT OF THE DISCLOSURE This invention is a method of sealing a battery to prevent gas and liquid leakage. The battery consists of two metal open-ended cans or cups, one larger than the other, chemical battery material and a plastic tubular seal. The
assembly takes place in a vacuum by filling one cup with the battery material, placing the plastic tube over the cylindrical wall of the smaller can, and forcing the larger can down over the tube.
The invention relates to an electric primary cell or a storage battery and a process for its production.
The construction according to the present invention finds its application mainly in very small primary cells or storage batteries. Such batteries are used in wrist watches and hearing aids. The proper sealing of such very small cells has been diflicult and intricate.
In accordance with the present invention, an outer larger metal cup, open at its top, has in its lower part a pill of chemically reactive material which is electrically connected with the bottom. A second smaller metal cup open at its bottom has within it a second chemically reactive pill. A plastic intermediate tube, for insulation and sealing, is positioned between the two metal containers. The tube is under radial pressure, preferably over its entire length.
The construction avoids a crimping process. The radial compressing of the tube between the two containers gives a simple and safe sealing of their contents.
According to the present invention, the outside diameter of the intermediate plastic tube is larger than the inside diameter of the larger metal cup in order to obtain radial pressure on the tube. In this construction it is suflicient to press fit the single parts together to obtain the radial pressure on the tube and sealing.
According to the method of the present invention, the assembly and easing of the pills, containers and tube occurs in a vacuum. This presents overpressure in the interior of the hermetically closed cell. The presence of empty spaces (an under pressure) has a favorable e-ifect because, when the outer sealing vacuum is ended, the tube and the cups are drawn into the interior.
A preferred embodiment of the present invention is shown in the attached drawing. Other characteristics and advantages of the present invention will be apparent from the drawing and description. In the drawing:
FIG. 1 is a partially cut-away side view of -a battery ce-ll according to the present invention with the tube and bottom cup shown in sectional View; and
FIG. 2 is a cross section taken through the intermediate plastic tube prior to its insertion between the containers.
As shown on FIG. 1, the bottom metal cup (can or container) 10 includes a cylindrical shell 11, a shell bottom 12, and a top shoulder 13 on its outer edge. A mesh metal disc 14 rests against the inside of the shell bottom 12. Disc 14 in free condition is convexly curved (dome shaped), however, in assembled condition it adopts a plane shape, as shown in FIG. 1. An inner chemically reactive pill 16 is positioned on top of the mesh metal disc 14. An upper chemically reactive pill 18 is positioned in metal cup (container) 20. Several separators 19 are provided between the pills 18 and 16.
An intermediate plastic tube 22 electrically insulates cup 20 from cup 10.
The wall thickness of the tube 22, according to the invention, is preferably smaller than 0.3 mm. An advantageous construction results from a wall thickness of the intermediate tube of 0.2 mm. The intermediate tube 22 has preferably a length of at least 44 mm. in order to obtain good sealing between the metal containers. A particularly favorable plastic for the intermediate tube 22 is poly-tetra fluoro-ethylene (PTFE) such as Du Ponts Teflon T.M. It has high elasticity and provides very good insulation and sealing.
The intermediate tube 22 rests with its shoulder 24 against the top shoulder 13 of the metal cup 10. Tube 22, in free condition (see FIG. 2), has a tapered outer rim 26 on its lower end and a tapered inner rim 28 on its upper end. Both these rims are no longer noticeable in FIG. 1 because the intermediate tube, after insertion between the containers is transformed and stretched. Seen in its entirety, the intermediate tube 22 after insertion is under stress in the longitudinal direction.
To assemble the cell, the parts are placed in a vacuum chamber with a vacuum of at least Torr. Then, the upper cup is pressed down into tube 22. The tube, with cup 20, is then pressed into cup 10. The intermediate tube is slightly stretched during the press fit of the inner can 18. The shell 11 of the metal cup 10 and the metal cup 20 exert radial pressure against the intermediate tube 22. This pressure causes the intermediate tube to be compressed and to remain under a continuous stress.
By this construction a relatively good sealing of the pills is obtained; the upper cup is sealed against the lower metal cup; and the entire content of the cell is sealed from the exterior.
The cell may either be a primary cell or a storage battery depending upon the chemical materials used in pills 16 and 20.
We claim:
1. The process of sealing a battery consisting of an outer metal cylindrical cup closed at one end, an inner metal cylindrical cup closed at one end, chemically reactive battery material, and a plastic tubular sealing and insulating member whose outer diameter is greater than the inner diameter of the outer can; the steps consisting of forming a vacuum around the parts to be assembled, placing the chemical material in the inner can, placing the tube over the inner can, and forcing the outer can over the tube by pressure on the said cans.
2. The process as in claim 1 wherein the vacuum is at least 100 Torr.
References Cited UNITED STATES PATENTS 2,571,616 10/1951 Ruben 136-107 X 2,636,063 4/1953 Schroeder 136-133 2,843,650 7/1958 Jacquier 136-133 X WINSTON A. DOUGLAS, Primary Examiner. D. L. WALTON, Assistant Examiner.

Claims (1)

1. THE PROCESS OF SEALING A BATTERY CONSISTING OF AN OUTER METAL CYLINDRICAL CUP CLOSED AT ONE END, AN INNER METAL CYLINDRICAL CUP CLOSED AT ONE END, CHEMICALLY REACTIVE BATTERY MATERIAL, AND A PLASTIC TUBULAR SEALING AND INSULATING MEMBER WHOSE OUTER DIAMETER IS GREATER THAN THE INNER DIAMETER OF THE OUTER CAN; THE STEPS CONSISTING OF FORMING A VACUUM AROUND THE PARTS TO BE ASSEMBLED, PLACING THE CHEMICAL MATERIAL IN THE INNER CAN, PLACING THE TUBE OVER THE INNER CAN, AND FORCING THE OUTER CAN OVER THE TUBE BY PRESSURE ON THE SAID CANS.
US468773A 1964-11-04 1965-07-01 Method of making sealed electric batteries Expired - Lifetime US3347710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1964U0011181 DE1259429C2 (en) 1964-11-04 1964-11-04 Small primary or secondary element and process for its manufacture

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US3347710A true US3347710A (en) 1967-10-17

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CH (1) CH436406A (en)
DE (1) DE1259429C2 (en)
GB (1) GB1063069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535115A1 (en) * 1982-10-21 1984-04-27 Duracell Int ELECTROCHEMICAL BATTERY

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933376C2 (en) * 1979-08-17 1983-02-10 Hotset Heizpatronen und Zubehör GmbH, 5880 Lüdenscheid Electric cartridge heater
DE3034600A1 (en) * 1980-09-13 1982-09-30 Varta Batterie Ag, 3000 Hannover Cylindrical or button cell - with interference fit between plastic lined cup and cap
DE3247191A1 (en) * 1981-12-26 1983-07-07 Kawaguchiko Seimitsu Co. Ltd., Yamanashi FLAT BATTERY

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571616A (en) * 1951-04-06 1951-10-16 Ruben Samuel Electric current producing cell
US2636063A (en) * 1950-05-08 1953-04-21 Sprague Electric Co Electrical battery
US2843650A (en) * 1956-03-12 1958-07-15 Accumulateurs Fixes Sealing means for galvanic cell casings

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE480291A (en) * 1947-02-18
US2692215A (en) * 1952-06-14 1954-10-19 Ruben Samuel Alkaline dry cell
US2829189A (en) * 1956-08-24 1958-04-01 Burgess Battery Co Alkaline dry cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636063A (en) * 1950-05-08 1953-04-21 Sprague Electric Co Electrical battery
US2571616A (en) * 1951-04-06 1951-10-16 Ruben Samuel Electric current producing cell
US2843650A (en) * 1956-03-12 1958-07-15 Accumulateurs Fixes Sealing means for galvanic cell casings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535115A1 (en) * 1982-10-21 1984-04-27 Duracell Int ELECTROCHEMICAL BATTERY

Also Published As

Publication number Publication date
GB1063069A (en) 1967-03-30
CH436406A (en) 1967-05-31
DE1259429B (en) 1968-01-25
DE1259429C2 (en) 1973-02-22

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Owner name: CHASE MANHATTAN BANK, N.A., THE

Free format text: SECURITY INTEREST;ASSIGNORS:TIMEX CORPORATION, A DE CORP.;TIMEX COMPUTERS LTD., A DE CORP.;TIMEX CLOCK COMPANY, A DE CORP.;AND OTHERS;REEL/FRAME:004181/0596

Effective date: 19830331