WO2025012013A1 - Traversée électrique et accumulateur d'énergie doté d'une telle traversée - Google Patents

Traversée électrique et accumulateur d'énergie doté d'une telle traversée Download PDF

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Publication number
WO2025012013A1
WO2025012013A1 PCT/EP2024/068544 EP2024068544W WO2025012013A1 WO 2025012013 A1 WO2025012013 A1 WO 2025012013A1 EP 2024068544 W EP2024068544 W EP 2024068544W WO 2025012013 A1 WO2025012013 A1 WO 2025012013A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection pin
base body
core
fixing material
electrical feedthrough
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.)
Ceased
Application number
PCT/EP2024/068544
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German (de)
English (en)
Inventor
Helmut Hartl
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.)
Schott AG
Original Assignee
Schott AG
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 Schott AG filed Critical Schott AG
Priority to CN202480044644.2A priority Critical patent/CN121444196A/zh
Priority to KR1020267000579A priority patent/KR20260040227A/ko
Publication of WO2025012013A1 publication Critical patent/WO2025012013A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/80—Gaskets; Sealings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/375—Constructional arrangements, e.g. casings
    • A61N1/3752—Details of casing-lead connections
    • A61N1/3754—Feedthroughs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • H01G2/103—Sealings, e.g. for lead-in wires; Covers
    • 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
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/191—Inorganic material
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/10—Sealing, e.g. of lead-in wires
    • 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

  • the invention relates to an electrical feedthrough, in particular for an electrical storage device, comprising a base body with a through-opening and a connection pin arranged in the through-opening, which is held in the through-opening in an electrically insulating manner by means of a fixing material.
  • a further aspect of the invention relates to a connection pin for an electrical feedthrough.
  • a further aspect relates to an electrical energy storage device which comprises at least one such feedthrough.
  • Electrical energy storage devices such as batteries or capacitors, the latter including supercapacitors, are used in a variety of applications for storing and providing electrical energy.
  • the electrical energy storage devices usually comprise a housing and at least one storage cell accommodated in the housing.
  • the storage cell can be electrically contacted from the outside via at least one electrical feedthrough in the housing.
  • Batteries in the sense of the invention are understood to mean both a disposable battery that can be disposed of and/or recycled after it has been discharged, and accumulators.
  • Accumulators preferably lithium-ion batteries, are intended for various applications such as portable electronic devices, mobile phones, power tools and, in particular, electric vehicles.
  • the batteries can replace traditional energy sources such as lead-acid batteries, nickel-cadmium batteries or nickel-metal hydride batteries.
  • the battery can also be used in sensors or in the Internet of Things.
  • Supercapacitors also called supercaps, are, as is well known, electrochemical energy storage devices with a particularly high power density. Unlike ceramic, film and electrolytic capacitors, supercapacitors do not have a dielectric in the traditional sense. In particular, they implement the storage principles of static storage of electrical energy through charge separation in a double-layer capacitance and the electrochemical storage of electrical energy through charge exchange with the help of redox reactions in a pseudocapacitance.
  • Supercapacitors include in particular hybrid capacitors, in particular lithium-ion capacitors. Their electrolyte usually comprises a solvent in which conductive salts are dissolved, usually lithium salts.
  • Supercapacitors are preferably used in applications in which a high number of charge/discharge cycles are required. Supercapacitors are particularly advantageous in the automotive sector, in particular in the field of recuperation of braking energy. Other applications are of course also possible and covered by the invention.
  • connection pin can consist of two pin sections, a first pin section made of Pt, Pt/Ir, FeNi, FeNiCo, FeCr, Nb, Ta, Mo, W, Cr, FeCr, V or Ti and a second pin section comprising aluminum, wherein the joint between the pin sections is arranged within a glass plug or a filler plug.
  • US 2014/212741 A1 discloses a conductor for an electrochemical battery, which has two sections, a first section made of a light metal facing the outside, and a second section made of copper facing the inside. The transition between the two sections is closed off by a mechanical seal.
  • WO 2016/074932 shows a housing or a housing part with a feedthrough that comprises a pin-shaped conductor with a first section made of light metal and a second section made of copper or copper alloy.
  • the pin-shaped conductor is held in an insulating manner in a through-opening in the housing or housing part via a glass or glass-ceramic material, with the transition between the different sections of the pin-shaped conductor being in the region of the glass or glass-ceramic material.
  • DE 102021 133 391 A1 discloses a housing part for an electrical storage device in which a connection pin is electrically insulated in a base body is fixed in a through-opening formed in the body.
  • a connection pad is provided which is subsequently connected to the connection pin in an additional work step by attaching the connection pad to the base body in an electrically insulating manner using an insulating material, for example using an adhesive or a cast material which engages in undercuts in the base body and/or on the connection pad.
  • a microbattery is known from WO2021/185648 A1, which is characterized by a particularly compact design.
  • a metal fixing material feedthrough for an electrical connection of the microbattery can be designed as a pressure glazing, so that a particularly reliable seal of the feedthrough is achieved.
  • connection pins made of a material adapted to the materials of a battery or a capacitor would be desirable in order to avoid corrosion, for example, and/or to improve contactability. It is therefore an object of the invention to provide an electrical feedthrough in which the connection pin can be adapted to the needs of both the battery and the metal fixing material feedthrough.
  • the electrical feedthrough comprises a base body with a through-opening and a connection pin arranged in the through-opening, which is held in the through-opening in an electrically insulating manner by means of a fixing material.
  • the connection pin has a core selected from copper, a copper alloy or CuSiC as the first electrically conductive material and has at least on a first side of the electrical feedthrough a covering material selected from aluminum, an aluminum alloy or AlSiC as the second electrically conductive material, which covers a first end face of the core, wherein the The connecting pin and the fixing material are designed and arranged such that a transition from the core to the covering material lies outside the fixing material.
  • the connecting pin preferably consists of a layered composite material or the connecting pin comprises a layered composite material.
  • the transition is a material boundary within the connection pin that is formed or located on an end face of the core. Because the transition between the material of the core, i.e. a central part of the connection pin, and the cover material that is arranged on an end face of the core, is outside the fixing material, a particularly stable feedthrough is achieved because different thermal expansion behavior of the two electrically conductive materials does not affect the contact area between the connection pin and the fixing material, which could otherwise lead to a weakening of the feedthrough. In addition, this increases the material selection for the base body and/or the fixing material for providing a hermetically sealed feedthrough because the design of the metal-fixing material feedthrough does not have to take into account the different thermal expansion behavior of two electrically conductive materials in the contact area with the fixing material.
  • the covering material covers at least one end face of the core, and preferably does not protrude laterally beyond the core.
  • An end face of the covering material is preferably substantially as large as an end face of the core and is shaped accordingly or in the same way as the end face of the core.
  • An end face of the covering material can simultaneously form an end face of the connection pin.
  • connection pin is understood to mean a section of the connection pin which - based on a longitudinal axis of the connection pin - preferably makes up at least 50% of the length.
  • the core forms the main part of the connection pin and makes up more than 50%, advantageously at least 55% or at least 60% of the length of the connection pin.
  • the longitudinal axis of the connection pin extends in a direction parallel to the axis of the through-opening. In the case of a substantially flat base body, the longitudinal axis of the connection pin extends perpendicularly to a plane of the base body in which the through-opening is formed.
  • the length of the connection pin in an electrical feedthrough or in a connection pin for an electrical feedthrough, can advantageously be 2 mm to 8 mm, preferably 3 mm to 6 mm.
  • the diameter of the connection pin can be 1 mm to 20 mm, preferably 2 mm to 10 mm.
  • the length or thickness of the core is advantageously 50% to 95%, preferably 60% to 90%, particularly preferably 70% to 80% of the length of the connection pin.
  • the length or thickness of the core can advantageously be at least or more than 50%, preferably at least 55%, preferably at least 60%, preferably at least 70%, in some advantageous variants at least 80% or at least 90%.
  • An advantageous upper limit for the length or thickness of the core can be a maximum of 95% of the length of the connection pin.
  • the length or thickness of the core can be a maximum of 90%, particularly preferably a maximum of 80% or a maximum of 75%.
  • the thickness or length of the covering material is advantageously 50% to 5%, preferably 40% to 10%, particularly preferably 30 to 20% of the length of the connection pin.
  • the thickness or length of the covering material can advantageously be a maximum of or less than 50%, preferably a maximum of 45%, preferably a maximum of 40%, preferably a maximum of 30%, in some advantageous variants a maximum of 25% or a maximum of 20% or a maximum of 15%.
  • An advantageous lower limit for the thickness or length of the covering material can be at least 5% or at least 10%, preferably at least 20%, in some advantageous variants at least 25%.
  • the fixing material advantageously borders on the core of the connection pin.
  • the fixing material preferably borders directly on the core, i.e. the fixing material and the core or the outer surface of the core are in direct contact with each other.
  • the minimum thickness of the core of the terminal pin is determined by the height of the fixing material.
  • the thickness of the covering material depends on the current carrying capacity of the terminal and the desired method of further connections are to be connected to the cover layer.
  • a suitable connection method can be a laser welding process.
  • the base body, the fixing material and the connection pin form a metal fixing material feedthrough through which the through opening of the base body is closed.
  • the feedthrough formed is preferably hermetically sealed.
  • Hermetically sealed is considered to be a He leakage rate of 1 ⁇ 10' 8 mbar l/s at a pressure difference of 1 bar.
  • the base body can in particular be a housing part for forming a housing for an electrical storage device.
  • the base body can be designed as a cover part that can be joined together with a cup-shaped housing part to form a housing for an electrical storage device.
  • the base body can also be part of a cover or cover part by being inserted into an opening formed in a cover element.
  • the electrical storage device can in particular be a battery or a capacitor, including a supercapacitor, wherein one or more storage cells are usually accommodated in the housing and can be electrically contacted from the outside via the electrical feedthrough as a connection terminal.
  • the feedthrough can also be designed as a multi-pole feedthrough in which the base body has several through-openings and in each of the through-openings a connection pin is held by a fixing material.
  • the first side of the electrical feedthrough on which the covering material is located is the side which faces outwards when a housing is formed.
  • the first end face of the connection pin with covering material therefore faces outwards when a housing is formed.
  • An alternative arrangement in which the covering material is arranged on the second side which faces inwards when a housing is formed is of course also possible and also advantageous.
  • the proposed connection pin comprises at least two different electrically conductive materials, wherein the first electrically conductive material of the core, which is preferably selected from copper or a copper alloy, according to the requirements the metal fixing material feedthrough is selected.
  • the material is selected in particular with regard to the thermal expansion coefficient and the resistance to deformation in interaction with the material properties of the base body and the fixing material.
  • copper or a copper alloy also has a high chemical resistance to materials of the storage cell, in particular battery electrolytes, and is therefore corrosion-resistant.
  • the second electrically conductive material of the cover material which is preferably selected from aluminum or an aluminum alloy, can have different tasks depending on the arrangement on the side facing outwards or inwards when forming a housing.
  • connection pin When arranged on the side facing outwards, it optimizes the connection pin with regard to simple and secure connection to electrical connections due to its good welding or soldering properties. When arranged on the side facing inwards, it can further optimize the connection pin with regard to chemical resistance to materials of the storage cell and electrochemical potentials and/or improve contactability there too.
  • the connecting pin has a cylindrical shape. It can advantageously have a cylindrical body or be present as a cylindrical body, so that the connecting pin has a lateral surface and two end faces.
  • the lateral surface of the cylinder is directed towards the fixing material, and the covering material that covers a first end face of the core is provided on at least one of the end faces of the connecting pin.
  • the core is preferably also cylindrical and thus has a lateral surface and two end faces. If the connecting pin is designed in such a way that there is no further layer on the second end face of the core, which is opposite the first end face, the end face of the core simultaneously forms the end face of the connecting pin.
  • the second end face of the core can also be covered with covering material.
  • the connecting pin advantageously has a circular cylinder shape.
  • general cylinder shapes with other shapes of the front sides are also conceivable.
  • oval shapes or rectangles with rounded corners are conceivable.
  • the connecting pin can have a so-called nail head shape, for example, which can be formed by two adjacent cylinders.
  • a first end face of such a nail head-shaped connecting pin is formed by a cylinder end face with the larger surface area and a second end face is formed by a cylinder end face with the smaller surface area.
  • the covering material In addition to covering a first end face of the core with the covering material, it can be advantageous in some variants to also cover a second end face of the core opposite the first end face with a further covering material made of a third electrically conductive material.
  • the third electrically conductive material can be selected to be identical or different to the second electrically conductive material.
  • the second electrically conductive material in particular can be optimized for simple and secure connection to electrical connections and the third electrically conductive material can be adapted, for example, to the requirements of the materials of a storage cell. Welding properties or soldering properties can be used as a criterion for the material selection, for example.
  • a lateral surface of the core facing the fixing material is at least partially not covered with covering material and is directly adjacent to the fixing material.
  • the lateral surface of the core is completely free of the covering material.
  • the covering material thus forms a layer or ply on an end face of the core.
  • the surface of the core is completely covered with covering material, so that in particular the lateral surface is also completely covered with covering material.
  • a melting temperature of the fixing material is selected to be lower than the melting point of all materials of the connecting pin. This ensures that the connecting pin is not damaged when the metal fixing material is manufactured using a temperature treatment step, e.g. for sintering or glazing the fixing material. In an advantageous variant, however, it may be sufficient if the melting temperature of the fixing material is selected to be lower than the melting point of the core material, i.e. it is only matched to the material of the core.
  • the fixing material can be obtained from a pressed part, which may contain, for example, a glass powder or a glass ceramic powder or a Ceramic powder.
  • the glass powder can consist of or comprise a partially crystallizable glass, so that during a temperature treatment the partially crystallizable glass is ceramized and a glass ceramic is obtained.
  • the second electrically conductive material and/or the third electrically conductive material is applied to the end face of the core by means of plating, galvanizing, coating, vapor deposition, welding or soldering.
  • plating, galvanizing, coating, vapor deposition, welding or soldering are preferred if comparatively high thicknesses of the covering material are applied.
  • the covering material in the form of a sheet or a foil - in the case of the second electrically conductive material a sheet or a foil, in particular made of aluminum or aluminum alloy - can be placed on the core material, in particular made of copper or copper alloy, and welded or soldered to it.
  • the covering material is preferably arranged free of openings or defects, so that the corresponding end face of the core is completely covered.
  • the covering material is preferably selected and arranged such that it is suitable for soldering or welding electrical contacts such as contact lugs. Accordingly, the covering material is preferably designed such that it is suitable for soldering or welding electrical contacts and no cracks or openings are created in the covering material.
  • connection pin consists of a layered composite material or comprises a layered composite material. It is thus formed from a material which has a layer of the first electrically conductive material, preferably copper or a copper alloy, and at least one layer of the second electrically conductive material, preferably aluminum or an aluminum alloy, wherein the previously individual layers are connected to one another, resulting in the layered composite material.
  • the layer of copper or a copper alloy forms the core of the terminal pin, and the layer of aluminum or an aluminum alloy forms the cover material of the terminal pin.
  • the layered composite material is preferably a plated layered composite material, also called a "composite material" for short.
  • An advantageous connection pin made of such a material is a plated connection pin.
  • the connection pin is thus a plated connection pin that consists of a plated layered composite material or comprises such a layered composite material that has a layer of copper or a copper alloy and at least one layer of aluminum or an aluminum alloy.
  • the starting materials i.e. here the covering material and the material of the core and possibly another covering material in the form of plates or strips, are usually provided and placed on top of one another and connected to one another, for example by rolling.
  • a microsection of the connecting pin in the area of the transition or the connection zone between the core and the cover material shows which process was used to produce a layered composite.
  • a plated, in particular roll-plated, connecting pin is characterized by essentially uniformly smooth surfaces in the connection zone, while a friction-welded connecting pin, for example, has an irregular surface in the connection zone, such as a wave structure.
  • a friction-welded connecting pin circular connection structures can be seen in a microsection of the connection zone (parallel to the connection zone), which are due to the relative movement of the connecting pin parts to be connected under pressure.
  • An advantageous plated connecting pin does not have such connection structures.
  • connection pin can be distinguished from a connecting pin with a soldered, in particular brazed, cover material layer in that there is no solder material in the connection zone.
  • connection pin is to have a further covering material made of a third electrically conductive material
  • the further covering material can also be integrated into the layered composite material by means of plating, in particular by providing it in the form of a plate or a strip and laying it on top of one another and connecting it to the other layers, for example by rolling.
  • the further covering material can also be applied to the end face of the core by means of another method. Alternative methods have been described above.
  • the plated connecting pin is advantageously separated from the plated composite material by means of a separation process, in particular by cutting.
  • This makes it possible to produce a connecting pin in one step in which at least one end face of the core is covered with covering material and preferably the covering material does not protrude laterally beyond the core.
  • It is preferably a cut-out, plated connecting pin which is separated from the composite material by a cutting process, preferably selected from laser cutting, water jet cutting or shear cutting.
  • a cutting process preferably selected from laser cutting, water jet cutting or shear cutting.
  • connecting pins can be manufactured in small to medium quantities.
  • the connecting pin is preferably cut out by shear cutting, particularly preferably by punching, which allows connecting pins to be manufactured cost-effectively in large quantities.
  • shear cutting preferably punching
  • the outer shape of the connecting pin, in particular the cylindrical connecting pin can be produced in one operation.
  • the connecting pin is a punched connecting pin. Since cut or punched workpieces have characteristic shape defects - for example (in the case of shear cutting) edge indentation due to plastic deformation, fracture zone, cutting burr, etc. - the shape characteristics can be used to of the connecting pin, the way in which it was manufactured can be determined.
  • a laser-cut connecting pin shows a thermally influenced edge zone, in particular a melted edge layer.
  • a water jet-cut connecting pin has a mechanically changed edge zone. Form errors and edge zone changes can be identified, for example, by microscopically examining the cut edge.
  • the connecting pin is a stamped, plated, in particular roll-plated, connecting pin.
  • one end face of the connection pin is arranged flush with a surface of the base body. If the base body has areas with different thicknesses, it is preferred that one end face is flush with the surface of the base body adjacent to the through-opening.
  • a flat shape of the electrical feedthrough is achieved and the feedthrough advantageously has the lowest possible height.
  • connection pin it is preferred that one end face or both end faces of the connection pin are arranged to protrude beyond a surface of the base body. If the base body has areas with different thicknesses, it is preferred that one or both end faces protrude beyond the surface of the base body adjacent to the through-opening. This creates an increased contact surface, which allows simple electrical contact to be made with the connection pin, for example by welding on contact lugs.
  • the material of the base body is preferably selected from light metal, light metal alloy, AlSiC, steel, in particular ferritic, austenitic or duplex steel, stainless steel, stainless steel, tool steel.
  • the alloy can advantageously be aluminum, aluminum alloy, titanium, titanium alloy, magnesium or magnesium alloy.
  • the material of the base body is preferably selected from aluminum or aluminum alloy or AlSiC.
  • AlSiC has a matrix of SiC that is infiltrated with Al.
  • light metals are understood to mean metals which have a specific weight of less than 5.0 kg/dm 3 .
  • the specific weight of the light metals is in the range of 1.0 kg/dm 3 to 3.0 kg/dm 3 .
  • the first electrically conductive material of the terminal pin is selected from copper, copper alloy or CuSiC.
  • CuSiC has a Cu-infiltrated SiC matrix.
  • a preferred example has a base body made of aluminum or aluminum alloy and a terminal pin with a core made of copper or copper alloy.
  • the second electrically conductive material of the connection pin is selected from aluminum, aluminum alloy or AlSiC. It is preferably aluminum or an aluminum alloy.
  • the third electrically conductive material of the connection pin - if present - is preferably selected from aluminum, an aluminum alloy, AlSiC, molybdenum, nickel or nickel alloys, palladium, silver or gold.
  • a preferred example of a terminal pin according to the invention has a core made of copper or copper alloy and a cover material made of aluminum or aluminum alloy.
  • the fixing material is a glass, a glass ceramic or a ceramic or comprises a glass, a glass ceramic or a ceramic.
  • Preferred glasses include technical glasses, in particular oxidic glasses, which are preferably chemically resistant to common materials in connection with electrical energy storage devices.
  • the fixing material is, for example, an aluminum phosphate glass, which comprises Al2O3 and P2O5, an aluminum borate glass, which comprises Al2O3 and B2O3, or a bismuth glass, which comprises, for example, Bi2O3 as a glass former.
  • glasses that comprise lead oxide as a glass former in particular glasses from the PbO-B2O3 system, or glasses containing vanadium can be used as fixing material.
  • suitable glasses are selected as fixing material according to their properties such as melting temperature and/or thermal expansion coefficient. Glasses with a low melting temperature can be advantageous. A glass whose melting temperature is below the melting point of aluminum or an aluminum alloy can be particularly advantageous. It can be preferred if the fixing material in an electrical feedthrough for an electrical storage device, for example a battery, a capacitor or a supercapacitor, comprises or consists of an aluminum phosphate glass. Suitable glasses are disclosed, for example, in WO 2012 110243 A1 and DE 10 2017 216 422 B3. Alternatively, the fixing material can comprise or consist of a bismuth-based glass that comprises Bi 2 O3 as a glass former, or a lead-based glass that comprises PbO as a glass former.
  • the fixing material or a precursor material can be provided in the form of a molded body.
  • the molded body can, for example, have the shape of a hollow cylinder.
  • the connection pin is inserted into the interior of this hollow cylinder, which is in turn inserted into an opening in a base body.
  • the connection pin is inserted into the interior of the hollow cylinder in such a way that the transition from core to cover material lies outside the fixing material.
  • the metal pin is then glazed into the opening using a temperature treatment, whereby the fixing material forms an intimate bond with the material of the connection pin and the material of the base body.
  • the base body can have a first thickness di outside the area of the through-opening and an increased second thickness d 2 in a reinforcement area with a width W adjacent to the through-opening. If the metal fixing material feedthrough is designed as a pressure glazing, the width W is selected such that sufficient pressure forces can be exerted on the fixing material by the base body.
  • This increased thickness of the reinforcement region can be achieved, for example, by providing thickened regions of the base body of the housing part, providing a collar and/or providing separate reinforcement parts, as disclosed, for example, in WO 2021/185648 A1 and also in EP 3 021 377 A2.
  • the glazing length along which the fixing material is connected to the material of the base body of the housing part can be influenced.
  • the housing part has a collar that forms an inner wall with a height that is greater than the remaining material thickness of the housing part, in particular a thickness of a housing part designed as a lid or a thickness of a wall of a housing part designed as a cup.
  • the collar is preferably designed as a highly arched, formed collar, wherein the housing part and the collar are in particular one-piece.
  • the base body comprises a flexible flange for joining the base body to other components such as parts of a housing.
  • the flange itself comprises an area, a so-called connection area, with which another component is connected to the base body.
  • the connection to the base body can be made by welding, in particular ultrasonic welding or soldering.
  • the welded connection is preferably designed in such a way that the connection is largely gas-tight and preferably a He leak rate of less than 10 -8 mbar l/sec is provided at a pressure difference of 1 bar.
  • the flexible flange can be obtained very easily.
  • the base body can be designed as a sheet metal part with a thickness d 2 , which is embossed down to the thickness di, and after embossing, the section with the thickness di, can be deformed so that the flexible flange is formed. It can be provided that the original thickness d 2 is retained around the area of the opening, so that the area adjacent to the opening is reinforced. It is also possible for a sheet metal with a thickness di to be formed into a flexible flange and for the raised sheet metal or a collar formed by forming the sheet metal to accommodate the glazing. Glazing in a raised flexible flange, in particular on a collar of the flexible flange, is possible in particular if the flexible flange and the raised area comprise austenitic steel or duplex steel as the material.
  • a relief device can be provided in the base body instead of or in addition to a flexible flange.
  • the relief device advantageously comprises at least one groove or depression, preferably at least one circumferential groove or circumferential depression. Instead of a groove, a series of recesses lying next to one another can also be provided.
  • the relief device can reduce thermal flow through the base body, i.e. create a thermal barrier, and/or reduce mechanical stress on the base body perpendicular to the axis of the connecting pin, since the base body is deformable, preferably reversibly deformable, in the direction perpendicular to the axis of the connecting pin. This means that less stress is introduced into the fixing material, in particular no tensile stresses that act on the fixing material and thereby reduce the compression on the fixing material, which improves the tightness of the feedthrough under thermal and mechanical stress.
  • the relief device in particular a groove or depression, is arranged on the first side of the electrical feedthrough, which faces outwards when a housing is formed.
  • the relief device in particular a groove or depression, is arranged on the second side of the electrical feedthrough, which faces outwards when a housing is formed. inwards.
  • the relief device comprises at least two grooves or depressions arranged on opposite sides of the base body.
  • an aluminum phosphate glass with the main components AI2O3, P2O5 and advantageously with alkali metal oxides is used as a glass or glass ceramic material.
  • the thermal expansion coefficient of such a glass material is advantageously in the range 13 to 25 ppm/K or 13 to 25- 10' 6 1/K, preferably in the range 13 to 2010' 6 1/K, particularly preferably in the range 13 to 18- 10 -6 1/K. If, for example, a bismuth glass is used, the thermal expansion coefficient is approximately 10.5- 10- 6 1/K.
  • the electrical feedthrough can be designed in the form of a pressure glazing.
  • the thermal expansion coefficient of the base body is selected to be greater than the thermal expansion coefficient of the fixing material, so that after a temperature treatment in which the fixing material is glazed in the through hole, the base body contracts more than the fixing material. This means that permanent pressure forces are exerted by the base body on the fixing material. These pre-tension the fixing material and ensure a particularly durable seal.
  • a thermal expansion coefficient of the base body is greater than a thermal expansion coefficient of the fixing material.
  • the thermal expansion coefficient of the base body is particularly preferably selected to be at least 5%, preferably at least 10%, particularly preferably at least 20%, in some advantageous variants at least 50% greater than the thermal expansion coefficient of the fixing material.
  • the prestress for the pressure glazing is essentially determined by the difference in the thermal expansion coefficients between the material of the base body and the fixing material.
  • the thermal expansion coefficient of the base body is in the range 18- 10' 6 1/K to 30 10' 6 1/ K and the thermal expansion coefficient of the fixing material is in the range 13- 10 6 1/K to 19- 10 6 1/K.
  • the thermal expansion coefficient for the fixing material is advantageous for obtaining a pressure glazing if the base body material is, for example, aluminum or an aluminum alloy and the core of the connection pin is copper or a copper alloy.
  • the thermal expansion coefficient of the base body can be in the range 12-10 -6 1/K to 19-10 -6 1/ K and the thermal expansion coefficient of the fixing material in the range 9 10' 6 1/K to 11 -10 -6 1/K.
  • the thermal expansion coefficient of the glass, ceramic or glass-ceramic material can be modified if necessary by mixing the glass, ceramic or glass-ceramic material with a filler. The thermal expansion coefficient can then be adjusted by selecting the type and amount of filler.
  • the thermal expansion coefficient of the core of the connecting pin is preferably in the range 14- 10 6 1/K to 19- 10 6 1/K, advantageously 15- 10 6 1/K to 18- 10 6 1/K. Accordingly, when the feedthrough is designed as a pressure glazing, the thermal expansion coefficient of the core can preferably be adapted to the thermal expansion coefficient of the fixing material or can be selected to be slightly smaller or slightly larger.
  • a base body made of aluminum or an aluminum alloy with a thermal expansion coefficient of approx. 23 ⁇ 10' 6 1/ K can be combined with an aluminum phosphate glass with a thermal expansion coefficient of approx. 16 -10' 6 1/ K and a core made of copper or copper alloy with a thermal expansion coefficient of approx. 16 -10' 6 1/ K.
  • a combination with a bismuth-based glass with a thermal expansion coefficient of approx. 10.5- 10' 6 1/ K can also be advantageous for pressure glazing with a base body made of aluminum or an aluminum alloy.
  • a The base body made of steel, in particular austenitic stainless steel, can be combined with a bismuth-based glass in a pressure glazing.
  • the thermal expansion coefficient of the base body and the thermal expansion coefficient of the fixing material can be adapted to each other. It is preferred if the difference in the thermal expansion coefficients is less than 5%.
  • an adapted implementation is understood to mean that the thermal expansion coefficients differ essentially by at most 1 * 10 ' 6 1/K, in particular are essentially the same.
  • the thermal expansion coefficient of the core of the connection pin is preferably adapted in the same way to the thermal expansion coefficient of the fixing material.
  • a base body made of a steel, in particular austenitic stainless steel, with a thermal expansion coefficient of approx. 16 to 18 -10' 6 1/ K can be combined with a suitable glass, in particular an aluminum phosphate glass with a thermal expansion coefficient of approx. 16 ⁇ 10 -6 1/ K, and a core made of copper or copper alloy with a thermal expansion coefficient of approx. 16 -10' 6 1/ K.
  • thermal expansion coefficient a usually specified in connection with glass-metal penetrations in the temperature range 20-300°C.
  • the fixing material has a height and the base body has a thickness in an area adjacent to the through-opening, wherein in a contact area between the base body and the fixing material the height of the fixing material is less than the thickness of the base body.
  • the height of the fixing material in particular in relation to a contact area with the base body, is less than the thickness of the base body in this contact area.
  • the fixing material is thus in relation set back on the base body on at least one side of the feedthrough, ie there is an offset between the fixing material and the base body. This measure can prevent or reduce pressure peaks directly at the contact between the base body and the edge of the fixing material. This reduces the risk of damage to the fixing material.
  • the fixing material can be set back on both sides, ie on both sides of the feedthrough, preferably by the same amount.
  • a surface of the base body adjacent to the through-opening protrudes beyond the fixing material on at least one side of the feedthrough.
  • the base body thus forms a projection on one side of the feedthrough or on both sides of the feedthrough.
  • the difference i.e. the difference
  • the difference between the height of the fixing material and the thickness of the base body is a maximum of 30% in total, preferably a maximum of 26% or a maximum of 24%.
  • An advantageous lower limit for the difference can be a total of 10% or 14% or 16%, i.e. the height of the fixing material is, for example, a total of 10 to 30% smaller than the thickness of the base body.
  • the difference can be distributed asymmetrically on both sides of the feedthrough.
  • the fixing material on each side is advantageously set back by at least 5% or at least 7% or at least 8% and/or advantageously by a maximum of 15% or a maximum of 13% or a maximum of 12%.
  • there can be an offset between the base body and the fixing material wherein the fixing material is set back on each side by 5 to 15%, preferably by 8 to 12%, relative to the base body in the area adjacent to the through-opening.
  • a safety valve and/or a predetermined breaking point is provided on housings for an energy storage device as a safety element in order to reduce the pressure in a controlled manner in the event of excess pressure inside.
  • the electrical feedthrough preferably has such a safety element.
  • Such an adjustment of the extrusion force is known, for example, from DE 2020 20106 518 U1.
  • the fixing material and its connection to the wall of the through-opening and the connecting pin are designed in such a way that a safety valve function is provided above a predetermined extrusion force, wherein the predetermined extrusion force is set by one or more of the following measures: a. selecting the thickness of the glazing, b. selecting the fixing material, c. selecting the proportion of bubbles in the fixing material, d. structuring the surface of the fixing material by adjusting the shape of a fixing material molded body before glazing, e. structuring the surface of the fixing material during glazing, f. laser processing the surface of the fixing material after glazing, g. introducing notches or tapers into the fixing material on one or both sides and/or h. introducing notches or tapers into the connecting pin and/or the base body.
  • the second electrically conductive material and/or the fixing material are selected such that they are resistant to electrolytes, in particular aqueous and/or non-aqueous electrolytes.
  • the materials of the feedthrough have a high chemical resistance to non-aqueous battery electrolytes, in particular to carbonates, preferably carbonate mixtures with a conductive salt, preferably comprising LiPFe.
  • a second aspect of the invention is the provision of a connection pin for an electrical feedthrough, in particular for an electrical feedthrough according to the invention, wherein the connection pin has a cylindrical body or is in the form of a cylindrical body and wherein the connection pin consists of a layered composite material or comprises a layered composite material which has a layer of a first electrically conductive material, preferably selected from copper or a copper alloy, and at least one layer of a second electrically conductive material, preferably selected from aluminum or an aluminum alloy, wherein the layer of the first electrically conductive material forms a core of the terminal pin and the at least one layer of the second electrically conductive material forms a covering material on a first end face of the core.
  • the cylindrical body of the connection pin has a lateral surface and two end faces.
  • the core of the cylindrical body forms the layer of the first electrically conductive material.
  • the core which is also advantageously cylindrical, has two end faces that lie opposite one another, with at least one end face being covered with a layer of the second electrically conductive material, i.e. covering material.
  • the covering material covers at least one of the end faces of the core, preferably not extending laterally beyond the core.
  • An end face of the covering material is preferably substantially as large as an end face of the core and is shaped accordingly or in the same way as the end face of the core.
  • An end face of the covering material can simultaneously form an end face of the connection pin.
  • the connecting pin can preferably have a circular cylindrical shape.
  • general cylindrical shapes with other shapes of the end faces are also conceivable.
  • oval shapes or rectangles with rounded corners are conceivable.
  • connection pin has a length of 2 mm to 8 mm, preferably 3 mm to 6 mm.
  • the connecting pin has a diameter of 1 mm to 20 mm, preferably 2 mm to 10 mm.
  • core is understood to mean a section of the connecting pin which - based on a longitudinal axis of the connecting pin - preferably makes up at least 50% of the length.
  • the core forms the main part of the connecting pin and makes up more than 50%, advantageously at least 55% or at least 60% of the length of the connecting pin.
  • the longitudinal axis of the connecting pin extends in a a direction parallel to the axis of the through-opening.
  • the longitudinal axis of the connecting pin extends perpendicularly to a plane of the base body in which the through-opening is formed.
  • the thickness of the covering material can preferably be at least 10% of the length of the connecting pin.
  • the connecting pin is advantageously a plated, preferably roll-plated, connecting pin, i.e. a connecting pin which is made from a layered composite material produced by means of plating, preferably by means of roll-plating, wherein the layered composite material can be in the form of a strip or plate, for example. Details of this are described above in connection with the first aspect of the invention.
  • the thickness of the covering material is at least large enough to provide a continuous covering layer free of openings and defects in the plated layer composite material.
  • the thickness of the covering material depends on the current-carrying capacity of the terminal and the desired method by which further connections are to be connected to the covering layer.
  • the connecting pin is separated from the layered composite material by means of a separation process, in particular by dividing, preferably by cutting out such as laser cutting, water jet cutting or shear cutting, which was described in detail above in connection with the first aspect of the invention.
  • this is a cut, preferably punched connecting pin.
  • the connecting pin is a stamped, roll-plated connecting pin, i.e. during production the connecting pin is made from a roll-plated layered composite material by shear cutting with a closed cutting line, in particular using cutting punches, cutting dies and presses.
  • Such connecting pins can be produced economically in large quantities.
  • a third aspect of the invention relates to the use of a connection pin according to the invention in an electrical feedthrough, in particular in an electrical feedthrough according to the invention.
  • a cylindrical body or an object having a cylindrical body, wherein the cylindrical body consists of a layered composite material or comprises a layered composite material is used as a connection pin in an electrical feedthrough.
  • the layered composite material has a layer of a first electrically conductive material, preferably selected from copper or a copper alloy, and at least one layer of a second electrically conductive material, preferably selected from aluminum or an aluminum alloy.
  • the layer of the first electrically conductive material forms a core of the connection pin and the at least one layer of the second electrically conductive material forms a covering material on a first end face of the core.
  • a cut-out, plated connecting pin is used.
  • a stamped, roll-plated connecting pin is particularly preferred.
  • connection pin and a feedthrough have already been described above in connection with the first aspect and the second aspect of the invention, so that reference is made to the above explanations in order to avoid repetition.
  • a further aspect of the invention is the provision of an electrical storage device.
  • the proposed electrical storage device is designed in particular as a battery or as a capacitor, including a supercapacitor, and comprises a housing with at least one of the electrical feedthroughs described herein and/or with a connection pin described herein.
  • the electrical storage device preferably comprises at least one storage cell, in particular a battery cell or a capacitor cell.
  • the base body of the electrical feedthrough is preferably designed as a housing part, in particular as a cover or as a component of a cover, which is preferably hermetically sealed to other housing parts, so that a hermetically sealed housing is formed for the electrical storage device.
  • a cover is connected to the electrical feedthrough by welding to a cup part.
  • Hermetically sealed is understood here to mean that the housing has a He leak rate of less than 10' 8 mbar l/sec at a pressure difference of 1 bar.
  • Fig. 1 shows a first embodiment of an electrical feedthrough with a one-sided flush design of the connection pin
  • Fig. 2 second embodiment of an electrical feedthrough with surfaces of the connection pin protruding beyond a base body and a recessed fixing material
  • Fig. 3 shows a third embodiment of an electrical feedthrough with double-sided coverage of the core of the connection pin and a reinforcement area
  • Fig. 4 shows a fourth embodiment of an electrical feedthrough with a flexible flange
  • Fig. 5 shows a fifth embodiment of an electrical feedthrough with a completely coated core of the connection pin
  • Fig. 6 a sixth embodiment of an electrical feedthrough with a flexible flange
  • Fig. 7 shows a seventh embodiment of an electrical feedthrough with a relief device and a recessed fixing material
  • Fig. 8 shows a cross section through an embodiment of a connection pin.
  • FIG. 1 shows a first embodiment of an electrical feedthrough 10.
  • the electrical feedthrough 10 comprises a base body 12 with a through-opening 14 into which a connection pin 20 with a longitudinal axis L is inserted.
  • the connection pin 20 is held in the through-opening 14 in an electrically insulating manner by means of a fixing material 16.
  • the fixing material 16 seals both against an inner wall of the through-opening 14 and against the connection pin 20, so that the through-opening 14 is tightly closed by the fixing material 16 and a metal fixing material feedthrough is formed.
  • the electrical feedthrough 10 shown is particularly suitable for use in connection with electrical storage devices such as batteries, in particular micro batteries, and capacitors.
  • the base body 12 can be a component of a housing for such an electrical storage device, for example a battery cover or a component of a battery cover.
  • the connection pin 20 then forms, for example, a connection terminal of the electrical storage device.
  • the base body 12 of the electrical feedthrough is joined to further housing parts. If the base body 12 is designed as a cover part, a housing for an electrical storage device can be formed by joining the cover part to a cup part. At least one storage cell, such as a battery cell or a capacitor cell, is usually arranged inside such a storage device.
  • connection of such a storage cell can be electrically connected to the connection pin 20 and another connection to another housing part.
  • connection pin 20 can be electrically connected to the connection pin 20 and another connection to another housing part.
  • a Base body 12 it is also possible to use a Base body 12 to form a plurality of through holes 14 and to arrange a plurality of connection pins 20 so that a multi-pole feedthrough is provided.
  • connection pin 20 which here is in the form of a cylindrical body, must be adapted in its material properties, in particular with regard to its thermal expansion coefficient, to the requirements of the metal fixing material feedthrough formed.
  • the material of the connection pin 20 should also be adapted to the materials used in the storage cell, such as the materials of the current conductors, electrode materials and electrolytes.
  • connection pin 20 has a core 22 made of copper, copper alloy or CuSiC as the first electrically conductive material, which is adapted to the requirements of the metal fixing material feedthrough, and on one end face a covering material 24, which covers an end face of the core 22, made of aluminum, aluminum alloy or AlSiC as the second electrically conductive material, which has different tasks depending on the arrangement on the side facing outwards or inwards when forming a housing.
  • a covering material 24 which covers an end face of the core 22, made of aluminum, aluminum alloy or AlSiC as the second electrically conductive material, which has different tasks depending on the arrangement on the side facing outwards or inwards when forming a housing.
  • connection pin 20 When arranged on the side facing outwards, it optimizes the connection pin 20 with regard to simple and secure contacting due to its good welding or soldering properties.
  • connection pin 20 When arranged on the side facing inwards, it can further optimize the connection pin 20 with regard to chemical resistance to materials of the storage cell and electrochemical potentials or also
  • connection pin 20 and the fixing material 16 are designed and arranged in the electrical feedthrough 10 in such a way that a transition 26a from the core 22 to the covering material 24 lies outside the fixing material 16, whereby the fixing material 16 only borders on the core 22 and thus has no lateral contact with the covering material.
  • the fact that the transition 26a, i.e. the material boundary, between the core 22 and the covering material 24 lies outside the fixing material 16 results in a particularly stable feedthrough, since different thermal expansion behavior of the two electrically conductive materials does not affect the contact area between the connection pin and the fixing material, which could otherwise lead to a weakening of the feedthrough.
  • the covering material 24 covers a Front face of the core 22.
  • the cover material 24 does not protrude laterally beyond the core 22.
  • An end face of the cover material is essentially the same size as an end face of the core and is shaped in the same way.
  • An end face of the cover material also forms an end face of the connection pin.
  • the second electrically conductive material can be applied to the end face of the core 22 of the connection pin 20 by means of plating, for example, as described below.
  • plating for example, as described below.
  • other variants are also conceivable for applying the second electrically conductive material.
  • thin sheets or foils made of the second electrically conductive material can be connected to the core 22 by welding or soldering, or the second electrical material can be applied by galvanic coating or a vapor deposition process.
  • a surface of the core 22 of the connection pin 20 remains free of the covering material 24, so that the fixing material 16 is directly adjacent to the core 22 or its surface. This ensures that the fixing material 16 can be in direct contact with the core 22 and the covering material 24 does not change the properties of the metal fixing material feedthrough.
  • the two materials of the connection pin 20 can thus each be selected completely independently of one another in order to achieve optimal adaptation to the requirements of the storage cells inside the housing, to the formation of the metal fixing material feedthrough and to the connection to electrical connections, i.e. to the contactability of the connection pin.
  • the metal fixing material feedthrough can be designed as a pressure glazing.
  • one end face of the connection pin 20 is flush with the corresponding surfaces of the base body 12, while the other end face of the connection pin 20 protrudes beyond the corresponding surface of the base body 12.
  • the total thickness of the connection pin 20 is thus greater than the thickness of the base body 12.
  • a surface of the fixing material 16 is flush with one end face of the connection pin 20.
  • the surfaces of the fixing material 16 are flush with the surfaces of the base body 12, ie - based on a contact area with the base body - the height H of the fixing material here is essentially the same as the thickness D of the base body 12 in an area adjacent to the through-opening 14.
  • the height H of the fixing material 16 is less than the thickness D of the base body 12, which is shown by way of example in Figures 2 and 7.
  • the fixing material 16 it would also be conceivable for the fixing material 16 to protrude beyond the surfaces and partially cover adjacent areas of the connection pin 20 and/or the base body 12.
  • both end faces of the connection pin 20 it is alternatively conceivable for both end faces of the connection pin 20 to protrude beyond the corresponding surfaces of the base body 12. This is shown by way of example in Figure 2.
  • connection pin 20 is in the form of a cylindrical body. It comprises a layered composite material which has a layer of a first electrically conductive material and at least one layer of a second electrically conductive material, wherein the layer of the first electrically conductive material forms a core 22 of the connection pin and the at least one layer of the second electrically conductive material forms a covering material 24 on an end face of the core 22.
  • the thickness or length of the core 22 here makes up approximately 80% of the length of the connection pin 20 and the thickness or length of the covering material 24 thus makes up approximately 20%.
  • connection pin 20 which is made of a roll-plated layered composite material which has a layer of copper or a copper alloy which forms the core 22 and at least one layer of aluminum or an aluminum alloy which forms the cover material 24.
  • the connection pin 20 shown is, by way of example, a stamped, roll-plated connection pin.
  • Figure 2 shows a second embodiment of the electrical feedthrough 10 with end faces or surfaces of the connection pin protruding beyond the base body 12 20.
  • the structure of the electrical feedthrough 10 corresponds to the first embodiment described with reference to Figure 1.
  • the connection pin 20 is designed and arranged such that its end faces are not flush with the corresponding surfaces of the base body 12.
  • the total thickness of the connection pin 20 is also greater here than the thickness of the base body 12.
  • the thickness of the covering material 24 is chosen to be greater.
  • Such a layered composite structure can be produced in particular by plating.
  • Figure 2 also shows that the height H of the fixing material 16a, which here also corresponds to the glazing length for the connecting pin, is less in the contact area with the base body than the thickness D of the base body 12 in an area adjacent to the through-opening 14.
  • the fixing material 16a is thus set back in relation to the base body 12, i.e. there is an offset 27.
  • a particularly advantageous embodiment is shown in which the fixing material 16a is set back on both sides by approximately the same amount, based on the thickness of the base body 12 in the area of the through-opening 14. This measure can prevent or reduce pressure peaks directly at the contact between the base body and the edge of the fixing material in the event of pressure glazing. This reduces the risk of material damage to the fixing material.
  • connection pin 20 in a feedthrough with recessed fixing material 16a one of the two front sides of the connection pin 20 is arranged flush with the corresponding surface of the base body 12, so that the connection pin 20 only protrudes beyond the base body 12 on one of the two sides, as shown in Figure 1, for example.
  • a one-sided flush arrangement of a front side of the connection pin with the corresponding surface of the recessed fixing material would also be possible.
  • FIG 3 shows a third embodiment of the electrical feedthrough 10.
  • the electrical feedthrough 10 has a base body 12 with a through-opening 14 in which a connection pin 20 is held in an insulating manner via a fixing material 16.
  • a further covering material 25 made of a third electrically conductive material is additionally arranged on a second end face of the core 22, so that both end faces of the core 22 of the connection pin 20 are covered with covering material 24, 25.
  • the covering material 24, 25 does not protrude laterally beyond the core 22.
  • the end faces of the covering material are essentially as large and shaped as the end faces of the core.
  • the end faces of the covering material form the end faces of the connection pin.
  • the further transition 26b i.e. the material boundary, between the core 22 and the further cover material 25 is also advantageously located outside the fixing material 16, which provides a particularly stable feedthrough, since different thermal expansion behavior of the different materials of the connection pin does not affect the contact area between the connection pin and the fixing material, which could otherwise lead to a weakening of the feedthrough.
  • the third electrically conductive material can be selected to be different or identical to the second electrically conductive material. Identical materials are shown as examples, i.e. the third electrically conductive material is selected here from aluminum, an aluminum alloy or AISiC.
  • the thicknesses of cover material 24 and cover material 25 may be the same, as shown, or different.
  • the base body 12 is also designed differently from the first two embodiments.
  • the base body 12 of the third embodiment has a reinforcement region with a width W, which borders on the through-opening 14 and within which the base body 12 has an increased thickness d2. Outside the reinforcement region, the base body 12 has the smaller thickness di.
  • the base body 12 offers a high level of mechanical stability, which is also suitable for forming the metal fixing material passage as a pressure glazing.
  • the width W is selected such that the required pressure forces can be built up.
  • the design of the base body 12 with a reinforcement area can of course be combined with other embodiments, so that, for example, in deviation from the illustration in Figure 3, an end face of the connection pin 20 is arranged flush with a surface of the base body 12 adjacent to the through opening 14 (see Figure 4) or only a first end face of the core 22 is covered with a covering material 24.
  • FIG 4 shows a fourth embodiment of an electrical feedthrough 10.
  • the electrical feedthrough 10 has a base body 12 with a through-opening 14 in which a connection pin 20 is held in an insulating manner via a fixing material 16.
  • the core 22 of the connection pin 20 is, as shown in the third embodiment of Figure 3, provided with covering material 24, 25 on its two end faces, wherein in the example shown one end face of the connection pin ends flush with a surface of the base body 12 adjacent to the through-opening 14.
  • the further covering material 25 with the third electrically conductive material is selected to be different from the covering material 24 with the second electrically conductive material.
  • the transition 26a from the core 22 to the covering material 24 is located outside the fixing material 16, while on the opposite side of the feedthrough 10 the further transition 26b from the core 22 to the further covering material 25 is arranged inside the fixing material 16, ie the fixing material 16 is laterally directly adjacent to the core 22 and further covering material 25.
  • the base body 12 of the fourth embodiment additionally comprises a flexible flange 30, via which it can be connected to other elements, for example to other components of a housing.
  • the flexible flange 30 is obtained, for example, by forming the base body 12 and has a transition region with a width W, within which a flat section of the base body 12 transitions into a glazing section with a thickness d2 that is greater than the thickness di of the flat section of the base body 12.
  • the base body 12 is flexible and yielding in the transition region, so that the area with the through-opening 14 is mechanically decoupled by the flexible flange 30. Accordingly, mechanical stresses of other parts of the housing are not transferred to the fixing material 16.
  • the thickness d2 within the glazing section can be freely selected within a wide range, so that a glazing length can be set independently of other dimensions of the base body 12 or of a housing with the base body.
  • a base body 12 with a flexible flange 30 could also be combined with a connection pin 20 in which only one end face has a covering material.
  • Figure 5 shows a fifth embodiment of an electrical feedthrough 10, which is designed similarly to the first embodiment of Figure 1, but with both end faces of the connection pin 20 protruding beyond the corresponding surfaces of the base body 12.
  • the core 22 of the connection pin 20 made of copper, copper alloy or CuSiC is completely surrounded by aluminum, an aluminum alloy or AlSiC, so that all surfaces of the core 22 are covered by the covering material 24. Accordingly, in particular both end faces and a lateral surface of the core 22 are covered by the covering material 24.
  • the fixing material 16 adjoins the core 22, i.e.
  • Figure 6 shows a sixth embodiment of an electrical feedthrough 10, which is designed similarly to the fourth embodiment of Figure 4 and comprises a flexible flange 30, the design and function of which have already been described above.
  • the core 22 of the connection pin 20 with the first electrically conductive material is, as shown in the fourth embodiment of Figure 4, provided on its two end faces with covering material 24, 25, whereby here, for example, the covering materials 24, 25 are identical, but their thicknesses are selected to be different. Since the further transition 26b between the core 22 and further covering material 25 is in contact with the fixing material here, the thickness of the covering material 25 is selected to be smaller.
  • the connection pin 20 is designed and arranged such that its two end faces are not arranged flush with the corresponding surfaces of the base body 12, but protrude beyond them.
  • the total thickness of the connection pin 20 is thus greater than the thickness of the base body 12 in the area of the feedthrough.
  • the arrangement of the core 22 and the thickness of the covering material 25 are chosen to be so large that, in conjunction with the fixing material 16, the first electrically conductive material of the core 22 is not accessible from one side of the electrical feedthrough 10. Accordingly, the fixing material 16 also directly borders on the covering material 25.
  • the covering material 25 is located on the second side of the electrical feedthrough 10, which faces inwards when a housing is formed. On the opposite first side of the feedthrough 10, which faces outwards when a housing is formed, the first electrically conductive material of the core 22 is accessible in the embodiment shown, since the transition 26a from the core 22 to the covering material 24 lies outside the fixing material 16.
  • Figure 7 shows a seventh embodiment of an electrical feedthrough 10, which is designed similarly to the second embodiment of Figure 2.
  • the base body 12 of the seventh embodiment has a circumferential connecting flange 32 on its outer edge, which is designed here in the form of a one-sided step.
  • the connecting flange 32 can be used to align and center the base body 12 in relation to another housing component - for example a cup-shaped housing element or a cover element - during the assembly of a housing or cover.
  • the connection to the other housing component can be made at the connecting flange 32, for example with the aid of a welded connection or soldered connection.
  • a connecting flange can also be combined with other base body designs, for example with reinforcements or a flexible flange.
  • a relief device 31 is provided in the base body 12, which is designed here as a groove or depression, preferably as a circumferential groove or circumferential depression.
  • the groove of the relief device 31 is arranged as an example on the first side of the electrical feedthrough 10, which faces outwards when a housing is formed. Of course, it could also be arranged on the other side of the housing.
  • Two grooves or depressions arranged on opposite sides of the base body can also serve as a relief device 31. Instead of a groove, a series of recesses lying next to one another can also be provided.
  • the relief device 31 reduces thermal flow through the base body 12, i.e. creates a thermal barrier, and/or reduces mechanical stress on the base body 12 perpendicular to the longitudinal axis of the connection pin 20, since the base body 12 is deformable, preferably reversibly deformable, in the direction perpendicular to the longitudinal axis of the connection pin 20.
  • the fixing material here is a recessed fixing material 16a, which is designed and arranged as described in connection with the second exemplary embodiment (see Figure 2).
  • a relief device 31 can also be realized in other embodiments of the invention, for example an embodiment according to Figure 1, in which the height H of the fixing material is substantially equal to the thickness D of the base body 12 in an area adjacent to the through opening 14.
  • connection pin 20 has a core 22 made of copper as the first electrically conductive material and a covering material 24 made of aluminum as the second electrically conductive material on an end face of the core 22.
  • a core 22 made of copper as the first electrically conductive material and a covering material 24 made of aluminum as the second electrically conductive material on an end face of the core 22 could also be a core made of a copper alloy and/or a covering material made of an aluminum alloy.
  • the connection pin 20 shown is advantageously a stamped, roll-plated connection pin.
  • the base body 12 consists of a material with a thermal expansion coefficient that is higher than that of the material of the core 22.
  • the base body 12 is made of aluminum or an aluminum alloy. If a low-melting fixing material 16 with a thermal expansion coefficient that is lower than the thermal expansion coefficient of the base body 12 is selected, a hermetically sealed pressure glazing can be provided in combination with a base body 12 made of aluminum or an aluminum alloy.
  • the fixing material 16 can be, for example, a bismuth-based glass. It is advantageously an aluminum phosphate glass.
  • Pressure glazing can also be provided with a base body made of steel if the fixing material is chosen accordingly, since the prestress for pressure glazing is essentially determined by the difference in the thermal expansion coefficients between the material of the base body and the material of the fixing material.
  • the materials of the base body 12 and fixing material 16, 16a and optionally core 22 can be adapted to each other with regard to their thermal expansion coefficients, so that an adapted implementation is present.
  • connection pin 20 is adapted to the requirements of the metal-fixing material feedthrough formed in terms of its material properties, in particular in terms of its thermal expansion coefficient.
  • a core 22 is also chemically resistant and thus adapted to the requirements of the materials of a storage cell, e.g. chemical resistance, electrochemical potentials, so that corrosion of the connection pin 20 is prevented or at least reduced. Consequently, it is not absolutely necessary to provide an additional covering material on the second end face of the core 22, which faces inwards when a housing is formed.
  • connection pin 20 can be optimized for example for simple and secure connection, e.g. soldering or welding, to electrical connections. Even if the covering material 24 made of aluminum or aluminum alloy is on the side facing inwards when a housing is formed, the ability to make contact with electrical connections can be improved as a result.
  • the advantageous material combinations mentioned in connection with the seventh embodiment can also be advantageous for other embodiments, for example designs with and without relief device 31, with and without reinforcement measures, with flush arrangement of the fixing material, etc.
  • connection pin 20 is here, for example, in the form of a cylindrical body and has a lateral surface 21c and two end faces 21a, 21b.
  • the core 22 of the cylindrical body which is also cylindrical here, has two end faces 23a, 23b that are opposite one another and a lateral surface 23c that forms a section of the lateral surface 21c of the connection pin.
  • a first end face 23a of the core 22 is covered with the covering material 24.
  • the covering material 24 covering the first end face 23a does not protrude laterally beyond the core 22.
  • the end face of the covering material, which forms the end face 21a of the connection pin 20, and the first end face 23a of the core 22 are essentially the same size and the same shape.
  • the front surface of the covering material could be somewhat smaller if the peripheral edge on the front side 21a of the connecting pin 20 were rounded.
  • connection pin 20 is designed such that there is no further layer on the second end face 23b of the core 22.
  • the second end face 23b of the core 22 thus simultaneously forms the end face 21b of the connection pin.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention concerne une traversée électrique (10), en particulier pour un dispositif de stockage électrique. La traversée électrique (10) comprend un corps principal (12) avec une ouverture de passage (14) et comprend également une broche-borne (20) qui est située dans l'ouverture de passage (14) et qui est maintenue dans l'ouverture de passage (14) de manière électriquement isolante par un matériau de fixation (16). L'invention concerne également le fait que la broche-borne (20) est constituée d'un matériau composite en couches ou comprend un matériau composite en couches et a un noyau (22) en cuivre ou en alliage de cuivre ou en CuSiC en tant que premier matériau électroconducteur et, au moins sur un premier côté de la traversée électrique (10), un matériau de recouvrement (24) en aluminium ou en alliage d'aluminium ou en AlSiC en tant que second matériau électroconducteur, qui recouvre une première face d'extrémité (23a) du noyau (22), la broche-borne (20) et le matériau de fixation (16) étant formés et situés de telle sorte qu'une transition (26a) du noyau (22) au matériau de recouvrement (24) se trouve à l'extérieur du matériau de fixation (16).
PCT/EP2024/068544 2023-07-07 2024-07-02 Traversée électrique et accumulateur d'énergie doté d'une telle traversée Ceased WO2025012013A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202480044644.2A CN121444196A (zh) 2023-07-07 2024-07-02 电气馈通件以及具有这种馈通件的能量存储器
KR1020267000579A KR20260040227A (ko) 2023-07-07 2024-07-02 전기 피드스루 및 이러한 피드스루를 갖춘 에너지 저장 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023118080.0A DE102023118080A1 (de) 2023-07-07 2023-07-07 Elektrische Durchführung und Energiespeicher mit einer solchen Durchführung
DE102023118080.0 2023-07-07

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WO2025012013A1 true WO2025012013A1 (fr) 2025-01-16

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KR (1) KR20260040227A (fr)
CN (1) CN121444196A (fr)
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WO (1) WO2025012013A1 (fr)

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US20030096162A1 (en) * 2001-11-09 2003-05-22 Lasater Brian J. Lithium-ion battery seal
EP2371419A2 (fr) 2010-03-29 2011-10-05 BIOTRONIK SE & Co. KG Conduite électrique d'un condensateur pour implants médicaux et procédé de fabrication et d'utilisation de celle-ci
WO2012110243A1 (fr) 2011-02-18 2012-08-23 Schott Ag Passage
US20140212741A1 (en) 2013-01-28 2014-07-31 Robert Bosch Gmbh Secondary battery
EP3021377A2 (fr) 2014-11-11 2016-05-18 Schott AG Composant presentant un renfort et realisation
WO2016074932A1 (fr) 2014-11-11 2016-05-19 Schott Ag Traversée
DE102017216422B3 (de) 2017-09-15 2019-01-03 Schott Ag Hochdehnendes Fügeglas mit verbesserter Wasserbeständigkeit und seine Anwendungen
DE202020106518U1 (de) 2020-03-17 2021-06-22 Schott Ag Elektrische Einrichtung
DE102021133391A1 (de) 2021-12-16 2023-06-22 Schott Ag Gehäuseteil für eine elektrische Speichereinrichtung und elektrische Speichereinrichtung
WO2023138843A1 (fr) * 2022-01-21 2023-07-27 Schott Ag Traversée électrique et accumulateur d'énergie doté d'une telle traversée

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123713A1 (de) * 2021-09-14 2023-03-16 Schott Ag Gehäuseteil für einen Energiespeicher und Energiespeicher

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030096162A1 (en) * 2001-11-09 2003-05-22 Lasater Brian J. Lithium-ion battery seal
EP2371419A2 (fr) 2010-03-29 2011-10-05 BIOTRONIK SE & Co. KG Conduite électrique d'un condensateur pour implants médicaux et procédé de fabrication et d'utilisation de celle-ci
WO2012110243A1 (fr) 2011-02-18 2012-08-23 Schott Ag Passage
US20140212741A1 (en) 2013-01-28 2014-07-31 Robert Bosch Gmbh Secondary battery
EP3021377A2 (fr) 2014-11-11 2016-05-18 Schott AG Composant presentant un renfort et realisation
WO2016074932A1 (fr) 2014-11-11 2016-05-19 Schott Ag Traversée
US20170222195A1 (en) * 2014-11-11 2017-08-03 Schott Ag Feed-through
DE102017216422B3 (de) 2017-09-15 2019-01-03 Schott Ag Hochdehnendes Fügeglas mit verbesserter Wasserbeständigkeit und seine Anwendungen
DE202020106518U1 (de) 2020-03-17 2021-06-22 Schott Ag Elektrische Einrichtung
WO2021185648A1 (fr) 2020-03-17 2021-09-23 Schott Ag Dispositif électrique, en particulier micro-batterie, et son procédé de production
US20230014877A1 (en) * 2020-03-17 2023-01-19 Schott Ag Housing part, in particular microbattery and method for manufacturing a housing part
DE102021133391A1 (de) 2021-12-16 2023-06-22 Schott Ag Gehäuseteil für eine elektrische Speichereinrichtung und elektrische Speichereinrichtung
WO2023138843A1 (fr) * 2022-01-21 2023-07-27 Schott Ag Traversée électrique et accumulateur d'énergie doté d'une telle traversée

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CN121444196A (zh) 2026-01-30
DE102023118080A1 (de) 2025-01-09

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