US3544386A - Method of rendering galvanic cells leakproof by encasing them in a jacket of thermoplastic synthetic material - Google Patents

Method of rendering galvanic cells leakproof by encasing them in a jacket of thermoplastic synthetic material Download PDF

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Publication number
US3544386A
US3544386A US3544386DA US3544386A US 3544386 A US3544386 A US 3544386A US 3544386D A US3544386D A US 3544386DA US 3544386 A US3544386 A US 3544386A
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United States
Prior art keywords
jacket
end wall
pressure
cell
welding
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English (en)
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Johann Musil
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Telephon und Telegraphen Fabriks AG Kapsch und Soehne
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Telephon und Telegraphen Fabriks AG Kapsch und Soehne
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92651—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by using stops
    • 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
    • H01M50/182—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells with a collector centrally disposed in the active mass, e.g. Leclanché cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • 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

Definitions

  • Galvanic primary cells for example Leclanch cells
  • the negative electrode is of pot or can form (zinc can) and forms the container of the cell.
  • the can surrounds the positive electrode (carbon electrode) with the depolarizer composition and the electrolyte.
  • the electrical energy is produced by decomposition of the negative electrode.
  • water is simultaneously formed and results in liquefaction of the electrolyte, this being solidified by means of a swelling substance in the unused state of the galvanic or voltaic cells.
  • the result of this liquefaction is a leakage of electrolytic liquid through the can wall, which is gradually destroyed during discharge. This leakage of the electrolytic liquid often causes great damage in the devices in which the primary cells are installed.
  • So-called leakproof cells which are enclosed in a jacket of absorbent material over which another, outer, jacket generally consisting of sheet steel is applied with the use of pressure, the outer steel jacket being connected to the top and the bottom of the cell by rolling them up under pressure, do not provide a satisfactory solution, because in these cells corrosion phenomena occur at both poles and result in the cell developing leaks at the external contacts.
  • the length over which each of the sheet metal parts is embedded is preferably substantially greater than the thickness of the sheet metal parts in the embedding zone, so as also to prevent any electrochemical corrosion of the external contacts.
  • the enclosing Wall of the outer jacket preferably consists of a soft plastic which is permeable to gas, but liquid-tight, for example high-pressure polyethylene, whereas the top and bottom of the jacket consist of a hard thermoplastic which is gas-tight and liquid-tight, for example low-pressure polyethylene.
  • the top and bottom may be united with the enclosing wall of the jacket to form tight joints therewith by injection moulding, welding and/ or melting.
  • the applicants have also indicated methods and devices which enable the plastics top and/or bottom to be Welded in leakproof manner to the thin plastics enclosing wall.
  • the present invention relates to a particularly advantageous method of rendering galvanic cells leakproof by encasing them in a jacket of thermoplastic synthetic material which permits the application of all the above-described earlier proposals made by the applicants and ensures that after the cell or a stack of cells has been encased the external contacts in the top and bottom bear against the associated cell contacts with considerable pressure and thus ensure a satisfactory transfer of current.
  • the method according to the invention consists in that a tubular jacket of thermoplastic synthetic material which is closed at one end by an end wall in which an external contact is embedded, and into which a galvanic cell or a stack of cells has been so inserted that one cell contact is touching the external contact in the end Wall, is supported at the peripheral edge of this end wall, after which a second end wall of thermoplastic synthetic material in which an external contact is likewise embedded is so inserted into the terminal portion of the tubular jacket projecting beyond the cell or the stack of cells that the external contact of the said second end wall likewise comes into contact with a cell contact, that on the outside of the second end wall there is then exerted a pressure slightly displacing this wall in the terminal portion of the tubular jacket, the said pressure being transmitted by way of the cell or the stack of cells in the tubular jacket to the opposite end wall supported at its edge as a deforming pressure arching the last-mentioned end rwall outwards elastically, and that the terminal portion of the tubularjacket is then 'welded
  • An apparatus which is suitable for performing this method is essentially characterised in that an axially movable pressure ram is arranged in axial alignment with respect to an annular bearing zone for the peripheral edge of one end of the cell assembly, the annular bearing zone being formed by a supporting element for the cell assembly, and a cap-like welding mould movable axially independently of the pressure ram and which can be heated and preferably also cooled and has an opening for the pressure ram is arranged coaxially therewith, so that after that end 'wall which is to be lwelded on has been forced down by means of the pressure ram and the other end wall of the jacket has been thereby caused to arch outward elastical- ⁇ ly, the Welding mould can be placed over the peripheries of the enclosing wall and the end wall of the jacket Iwhich is to be welded on, the Welding mould overlapping the said peripheries.
  • FIGS. 1 to 3 illustrate diagrammatically an apparatus according to the invention in three different working stages.
  • FIGS. 4 and 5 illustrate the working procedure and the locking of the pressure ram of the apparatus according to the invention.
  • the cell assembly designated as a whole -by the reference X consists of a single galvanic cell Z, the bottom contact B of which is formed by the base surface of a zinc can and the top contact K of which is formed by the free end of the carbon electrode.
  • the complete cell is enclosed in a jacket consisting of a cylindrical surrounding or sheathing wall M, preferably of high-pressure polyethylene, an end Wall S1 already united lwith this surrounding wall and containing an external contact A1 embedded therein in a leakproof manner, and an end wall S2 to be welded on by means of the apparatus according to the invention and in which an external contact A2 is likewise embedded in a leakproof manner.
  • the external contact A1 establishes the conductive connection with the top contact K and the external contact A2 establishes the conductive connection with the bottom contact surface B ofthe cell Z.
  • the contact plates as ⁇ already mentioned, are provided in accordance .'with an earlier proposal with a complete vrow of closely adjacent apertures in the embedding zone, these apertures having plastic extending through them in rivet fashion.
  • an axially movable pressure ram 5 which is controlled by a hydraulic cylinder 6 and extends through the cylinder, the free endof the ram 5 carrying a wedge 7.
  • this wedge 7 can co-operate with a sliding wedge v8 actuated n turn duct 13.
  • 'I'he mould 10 has projecting arms which areconnected to the lower endsof actuating rods 14.
  • the upper ends of the actuating rods 14 are interconnected by a crossbeam 15 and a drive in the form of a pneumatic cylinder 16 acts on this crossbeam.
  • annular heating body 17 Arranged coaxially with the ram 5 and the mould 10 is an annular heating body 17 which carries a heat shield 18 on top and can be moved past the pneumatic cylinder .6 of the pressure ram 5 and is carried by rods 19 which are also interconnected at their upper ends by a crossbeam 20 on which a drive in the form of a pneumatic cylinder 21 acts.
  • the actuating rods 19 are passed through bores in the crossbeam 15 joining the actuating rods 14.
  • the welding mould 10 is thin-walled and consists of material which is as good a heat conductor as possible.
  • the mould is normally cooled to far below the softening point of the plastic by a constant flow of cooling medium through the duct 13.
  • the heating body 17 which is fed with electricity, for example, and has great heat capacity
  • the region of the neck 12a of the cap-like mould in which the welding of the surrounding wall M to the end wall S2 of the cell assembly X is to take place under the action of heat and pressure, can be rapidly heated to welding temperature and the cooling elfectovercome.
  • the mould again rapidly assumes the temperature of the cooling medium, which is substantially below the softening point of the plastic.
  • the pressure ram 5 is lirst lowered by applying a constant predetermined pressure in the pneumatic cylinder 6, so that the ram shifts the end wall S2 slightly within the surrounding wall and, by way of the cell Z and its top contact K supported against the external contact A1 of the end wall S1, exerts a deforming pressure on the end wall S1 supported only at its peripheral edge on the annular bearing zone 3 of the supporting element 1. In this way, the said end wall S1 is archedoutward elastically, as shown in FIGS. 2 to 4.
  • the effective elastic deforming pressure has a constant predetermined value.
  • the pressure ram 5 is now held by supplying the pneumatic cylinder 9 and thereby causing the sliding wedge 8 to advance until it bears against the wedge 7 connected to the pressure ram 5, so that the wedge 7 cannot move downwards any further, that is the elastic outward arching of the end wall S1 is not altered during the further working stages.
  • the welding zone is shaped by the suitably rounded hollow neck 12a of the welding mould 10.
  • FIG. 2 the pressure ram 5, the welding mould 10 and the heating body 17 are shown in the position adopted by these ⁇ parts during the welding operation.
  • the heating body 17 is lifted away from the welding mould by applying pressure in the cylinder 21, so that the said mould is cooled down below the solidication temperature of the plastic and the welding zone is consequently rapidly solidied.
  • This working stage is shown in FIG. 3.
  • the Welding mould is lifted away by applying pressure in the cylinder 16 and, finally, by applying pressure in the cylinder 6 the pressure ram 5 is retracted, as a result of which the end wall S2 is relieved of pressure and the elastically arched end Wall S1 assumes its original form, a relatively high contact pressure ensuring a good transfer of current being produced between the external contacts A1 and A2 and the associated cell contacts K and B, respectively.
  • the sliding wedge 8 is then retracted andthe finished encased cell is removed from the supporting element 1, after which the apparatus is ready for the next operating cycle.
  • the apparatus described allows various modications of design within the limits of the invention.
  • other driving means in place of the pneumatic cylinders 6, 9, 16 and 21 illustrated.
  • the cooling eiect of which is temporarily overcome by placing a heating body 17 of high heat capacity thereon in order to bring the Welding mould to welding temperature
  • a mould consisting of material which is a good conductor in the welding zone and of heat-insulating material in the adjacent zones and on which heating and cooling bodies of high capacity are placed alternately.
  • a -welding mould which is heated directly, for example by highfrequency currents.
  • the actuating members for the main parts of the apparatus such as the pressure ram 5, the welding mould 10 and the heating body 17, may also be controlled otherwise than through rods 14, 19, etc., for instance through cam discs.
  • the locking device for the pressure ram and the stop for the travel of advance of the welding mould may also be designed otherwise than shown.
  • galvanic cell means is at least one galvanic cell.
  • galvanic cell means is a stack of abutting galvanic cells.
  • said pressure ram having a wedge, a supporting element, a welding mold, at least one pneumatic cylinder, a sliding wedge, a cooling medium duct, a heating body, and heat shield,
  • thermoplastic jacket from said supporting element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Primary Cells (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US3544386D 1967-03-07 1968-03-06 Method of rendering galvanic cells leakproof by encasing them in a jacket of thermoplastic synthetic material Expired - Lifetime US3544386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT217367A AT269242B (de) 1967-03-07 1967-03-07 Verfahren und Einrichtung zum dichten Ummanteln von galvanischen Primärzellen mit einer Hülle aus thermoplastischem Kunststoff

Publications (1)

Publication Number Publication Date
US3544386A true US3544386A (en) 1970-12-01

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US3544386D Expired - Lifetime US3544386A (en) 1967-03-07 1968-03-06 Method of rendering galvanic cells leakproof by encasing them in a jacket of thermoplastic synthetic material

Country Status (9)

Country Link
US (1) US3544386A (ref)
JP (1) JPS5022212B1 (ref)
AT (1) AT269242B (ref)
CH (1) CH464298A (ref)
DE (1) DE1671951A1 (ref)
FR (1) FR1557270A (ref)
GB (1) GB1166228A (ref)
NL (1) NL6803211A (ref)
SE (1) SE336633B (ref)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113895043A (zh) * 2021-09-03 2022-01-07 江西联塑科技实业有限公司 一种pvc-u排水管材的热熔焊接方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252114U (ref) * 1975-10-14 1977-04-14

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1481145A (en) * 1922-08-07 1924-01-15 Pepper David Electric battery
US2411272A (en) * 1943-08-21 1946-11-19 Bright Star Battery Company Battery
US3449171A (en) * 1964-06-24 1969-06-10 Ever Ready Co Method of making an encapsulated dry battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1481145A (en) * 1922-08-07 1924-01-15 Pepper David Electric battery
US2411272A (en) * 1943-08-21 1946-11-19 Bright Star Battery Company Battery
US3449171A (en) * 1964-06-24 1969-06-10 Ever Ready Co Method of making an encapsulated dry battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113895043A (zh) * 2021-09-03 2022-01-07 江西联塑科技实业有限公司 一种pvc-u排水管材的热熔焊接方法
CN113895043B (zh) * 2021-09-03 2023-07-18 江西联塑科技实业有限公司 一种pvc-u排水管材的热熔焊接方法

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GB1166228A (en) 1969-10-08
NL6803211A (ref) 1968-09-09
FR1557270A (ref) 1969-02-14
SE336633B (ref) 1971-07-12
JPS5022212B1 (ref) 1975-07-29
AT269242B (de) 1969-03-10
CH464298A (de) 1968-10-31
DE1671951A1 (de) 1972-01-27

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