FR2829963A1 - Voltaic cell container sealing apparatus has sonotrode or supporting anvil surface made with boss in sealing zone surrounded by flat surface - Google Patents

Voltaic cell container sealing apparatus has sonotrode or supporting anvil surface made with boss in sealing zone surrounded by flat surface Download PDF

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Publication number
FR2829963A1
FR2829963A1 FR0211721A FR0211721A FR2829963A1 FR 2829963 A1 FR2829963 A1 FR 2829963A1 FR 0211721 A FR0211721 A FR 0211721A FR 0211721 A FR0211721 A FR 0211721A FR 2829963 A1 FR2829963 A1 FR 2829963A1
Authority
FR
France
Prior art keywords
sonotrode
boss
anvil
voltaic cell
cell container
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.)
Granted
Application number
FR0211721A
Other languages
French (fr)
Other versions
FR2829963B1 (en
Inventor
Johannes Maier
Markus Kohlberger
Joachim Knecht
Stefan Furst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VARTA Microbattery GmbH
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VARTA Microbattery GmbH
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 VARTA Microbattery GmbH filed Critical VARTA Microbattery GmbH
Publication of FR2829963A1 publication Critical patent/FR2829963A1/en
Application granted granted Critical
Publication of FR2829963B1 publication Critical patent/FR2829963B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/121—Organic material
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7373—Joining soiled or oxidised materials
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
    • B29C66/3282—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for reinforcing the joint
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30221—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being point-like
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • B29L2031/3061—Number plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Package Closures (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Apparatus, designed to produce a gas- and liquid-proof seal for a voltaic cell container using ultrasound welding for the plastic layers of the container components, has an anvil (1) to supports the components (3, 4) and a sonotrode (2) to weld them together. Apparatus, designed to produce a gas- and liquid-proof seal for a voltaic cell container using ultrasound welding for the plastic layers of the container components, has an anvil (1) to supports the components (3, 4) and a sonotrode (2) to weld them together. The surface of the sonotrode or the anvil has a boss (7) in the sealing zone surrounded by a flat surface (8). The boss acts as a guide directing the ultrasound energy and prevents the formation of ridges round the weld seams.

Description

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La présente invention concerne un dispositif de scellement du boîtier d'éléments galvaniques, de manière étanche aux gaz et aux liquides, ayant la forme d'une pile plate mince, par soudage aux ultra-sons de couches de matière plastique des composants du boîtier, ce dispositif comportant une enclume servant d'appui aux pièces à relier et en regard de cette enclume, une sonotrode servant à réaliser le soudage aux ultrasons.  The present invention relates to a device for sealing the housing of galvanic elements, in a gas and liquid tight manner, having the form of a thin flat battery, by ultrasonic welding of plastic layers of the components of the housing, this device comprising an anvil serving as support for the parts to be connected and opposite this anvil, a sonotrode used for carrying out ultrasonic welding.

Les éléments galvaniques sous la forme de piles minces et plates sont connus par exemple selon le document EP 862 227 Al. De telles cellules comportent une électrode positive et une électrode négative avec interposition de séparateurs par exemple entre deux films de matière plastique servant de composants de boîtier, et qu'il faut réunir de manière étanche aux gaz et aux liquides. Les films formant les parties de boîtier peuvent également être des films de matière plastique métallisée ou des films métalliques, par exemple des films de cuivre revêtus au niveau de leurs zones tournées vers l'intérieur de la pile, d'une matière plastique que l'on soude après l'assemblage.  Galvanic elements in the form of thin and flat batteries are known, for example, from document EP 862 227 A1. Such cells include a positive electrode and a negative electrode with interposition of separators, for example between two plastic films serving as components of housing, and must be joined in a gas and liquid tight manner. The films forming the housing parts can also be films of metallized plastic or metal films, for example copper films coated at their areas facing the inside of the stack, with a plastic material that we weld after assembly.

Pour relier ces parties ou composants de boîtier, on utilise souvent un procédé de soudage. Selon ce procédé, on bloque les composants sur une enclume alignée par rapport à une sonotrode et ensuite on assemble par soudage aux ultrasons.  To connect these housing parts or components, a welding process is often used. According to this method, the components are blocked on an anvil aligned with respect to a sonotrode and then assembled by ultrasonic welding.

La présente invention a pour but de permettre ce soudage aux utra-sons de manière fiable même pour des éléments galvaniques très minces.  The present invention aims to allow this welding to utra-sounds reliably even for very thin galvanic elements.

A cet effet, l'invention concerne un dispositif du type défini ci-dessus, caractérisé en ce que la surface de la sonotrode ou de l'enclume comporte dans la zone de scellement un bossage entourée par une surface plane.  To this end, the invention relates to a device of the type defined above, characterized in that the surface of the sonotrode or of the anvil comprises in the sealing zone a boss surrounded by a flat surface.

La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un exemple de réalisation représenté dans les dessins annexés, dans lesquels : - la figure 1 est une section d'un dispositif comportant une sonotrode classique, - la figure 2 montre un dispositif avec une seule sonotrode selon l'invention.  The present invention will be described below in more detail with the aid of an example embodiment shown in the accompanying drawings, in which: - Figure 1 is a section of a device comprising a conventional sonotrode, - Figure 2 shows a device with a single sonotrode according to the invention.

Les dispositifs connus utilisés pour souder des films de matière plastique se composent d'une enclume 1 et d'une sonotrode 2 en regard de l'enclume. L'objet à souder se compose d'un film de scellement  The known devices used for welding plastic films consist of an anvil 1 and a sonotrode 2 facing the anvil. The object to be welded consists of a sealing film

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3, inférieur et d'un film de scellement 4 supérieur. Pendant l'opération de soudage on presse la sonotrode 2, arrondie contre le film supérieur 4 et on soude au film inférieur 3 en faisant agir en même temps des ultrasons. Le foyer d'énergie qui fait fondre la matière du film porte la référence 9. Il se produit ainsi un flux de matière fondue 5 s'écartant de la sonotrode. Ce flux forme un bourrelet 6 par accumulation. Ce bourrelet modifie le contour extérieur du film en formant une partie relevée. Or, pour certaines applications, ce bourrelet n'est pas souhaitable.  3, lower and an upper sealing film 4. During the welding operation, the sonotrode 2, which is rounded against the upper film 4, is pressed and the lower film 3 is welded by making ultrasound work at the same time. The energy source which melts the material of the film is marked with the reference 9. A flux of molten material 5 thus deviating from the sonotrode is produced. This flow forms a bead 6 by accumulation. This bead modifies the outer contour of the film by forming a raised part. However, for certain applications, this bead is not desirable.

Selon l'invention, la sonotrode 2 représentée à la figure 2 comporte un contour 7 relevé en son milieu et qui est entouré par un contour plan 8. L'augmentation de hauteur fonctionne comme élément directeur d'énergie, si bien que l'énergie des ultra-sons agit de manière précise seulement au niveau de la ligne périphérique. Le foyer d'énergie 9 ainsi formé fait fondre la matière des films 3,4, en profondeur et produit un refoulement de la matière fondue 5. Ce refoulement de la matière fondue produit en même temps le refoulement de la saleté ou de l'électrolyte qui se trouve à la surface des films de scellement. La matière fondue refoulée 5 forme des deux côtés près du foyer d'énergie 9, des coins en épaisseur ne laissant subsister aucune surface encrassée comme couche de séparation, car la saleté se mélange à la matière fondue. Les surfaces latérales planes 8 à côté du bossage 7, rond, de la sonotrode 2, aplanissent le coin en épaisseur pour ne pas avoir de bourrelet. Il est également possible de prévoir le contour formé du bossage 7 et de la surface plane 8 sur l'enclume 1 et d'avoir une sonotrode plane 2.  According to the invention, the sonotrode 2 shown in FIG. 2 has a contour 7 raised in the middle and which is surrounded by a planar contour 8. The increase in height functions as an energy director, so that the energy ultrasound acts precisely only at the peripheral line. The energy hearth 9 thus formed melts the material of the films 3,4 at depth and produces a backflow of the molten material 5. This backflow of the molten material simultaneously produces the backflow of dirt or electrolyte which is on the surface of the sealing films. The discharged melt 5 forms on two sides near the energy source 9, thick corners leaving no dirty surface as a separating layer, because the dirt mixes with the melt. The flat side surfaces 8 next to the boss 7, round, of the sonotrode 2, flatten the corner in thickness so as not to have a bead. It is also possible to provide the contour formed by the boss 7 and the planar surface 8 on the anvil 1 and to have a planar sonotrode 2.

Comme le scellement au niveau du foyer d'énergie est fait en profondeur et de manière solide, cela garantit un résultat maximum pour le scellement et ne produit pas de bourrelet en surépaisseur.  As the sealing at the level of the energy source is done in depth and in a solid manner, this guarantees a maximum result for the sealing and does not produce an excess bead.

Le dispositif selon l'invention permet une fusion précise de pièces très minces comme par exemple le scellement de piles plates de lithium, prévues pour des cartes à puces électroniques et qui ont par exemple une épaisseur de seulement 0,4 mm. The device according to the invention allows a precise fusion of very thin parts such as for example the sealing of flat lithium batteries, intended for electronic chip cards and which for example have a thickness of only 0.4 mm.

Claims (1)

REVENDICATION Dispositif de scellement du boîtier d'éléments galvaniques, de manière étanche aux gaz et aux liquides, ayant la forme d'une pile plate mince, par soudage aux ultra-sons de couches de matière plastique des composants du boîtier, ce dispositif comportant une enclume servant d'appui aux pièces à relier et en regard de cette enclume, une sonotrode servant à réaliser le soudage aux ultra-sons, caractérisé en ce que la surface de la sonotrode (2) ou de l'enclume (1) comporte dans la zone de scellement un bossage (7) entourée par une surface plane (8). CLAIMING Device for sealing the casing of galvanic elements, in a gas and liquid tight manner, in the form of a thin flat battery, by ultrasonic welding of plastic layers of the components of the casing, this device comprising a anvil serving as support for the parts to be connected and opposite this anvil, a sonotrode used for carrying out ultrasonic welding, characterized in that the surface of the sonotrode (2) or of the anvil (1) comprises in the boss sealing area (7) surrounded by a flat surface (8).
FR0211721A 2001-09-26 2002-09-23 DEVICE FOR SEALING A BOX OF GALVANIC ELEMENTS IN A GAS AND LIQUID TIGHT MANNER Expired - Fee Related FR2829963B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10147565A DE10147565A1 (en) 2001-09-26 2001-09-26 Device for gas and liquid-tight sealing of the housing of galvanic elements

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FR2829963A1 true FR2829963A1 (en) 2003-03-28
FR2829963B1 FR2829963B1 (en) 2005-05-27

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CN103807063A (en) * 2012-11-07 2014-05-21 通用汽车环球科技运作有限责任公司 Polymeric vessel

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US8878539B2 (en) 2004-04-06 2014-11-04 Robert Bosch Gmbh State of charge tracking system for battery systems based on relaxation voltage
US7570024B2 (en) 2004-04-06 2009-08-04 Cobasys, Llc Battery state of charge voltage hysteresis estimator
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NL1037376C2 (en) * 2009-10-07 2011-04-11 Robert Bosch Verpakkingsmachines B V DEVICE FOR ULTRASONIC WELDING OF AT LEAST TWO PLASTIC FOLILE LAYERS.
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CN103807063A (en) * 2012-11-07 2014-05-21 通用汽车环球科技运作有限责任公司 Polymeric vessel

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FR2829963B1 (en) 2005-05-27
JP2003181929A (en) 2003-07-03

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