WO2023083508A2 - Unité de mise en contact de cellules - Google Patents

Unité de mise en contact de cellules Download PDF

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Publication number
WO2023083508A2
WO2023083508A2 PCT/EP2022/072322 EP2022072322W WO2023083508A2 WO 2023083508 A2 WO2023083508 A2 WO 2023083508A2 EP 2022072322 W EP2022072322 W EP 2022072322W WO 2023083508 A2 WO2023083508 A2 WO 2023083508A2
Authority
WO
WIPO (PCT)
Prior art keywords
contact
wire loop
contacting unit
spring
fuel cell
Prior art date
Application number
PCT/EP2022/072322
Other languages
German (de)
English (en)
Other versions
WO2023083508A3 (fr
Inventor
Peter Broghammer
Henryk Waleczek
Elmar Neugart
Original Assignee
Marquardt 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 Marquardt Gmbh filed Critical Marquardt Gmbh
Priority to EP22765417.5A priority Critical patent/EP4430689A2/fr
Publication of WO2023083508A2 publication Critical patent/WO2023083508A2/fr
Publication of WO2023083508A3 publication Critical patent/WO2023083508A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04537—Electric variables
    • H01M8/04544—Voltage
    • H01M8/04552—Voltage of the individual fuel cell
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/364—Battery terminal connectors with integrated measuring arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/025—Contact members formed by the conductors of a cable end

Definitions

  • the invention relates to a cell contacting unit CVP, also called Cell Voltage Pickup.
  • a cell contacting unit CVP Cell Voltage Pickup
  • CVP Cell Voltage Pickup
  • This unit is for measuring a cell voltage capable of simultaneously and easily measuring the voltages of all cells of a fuel cell stack.
  • this includes a a plurality of voltage measurement probes and needle-type voltage measurement terminals having a tip side protruding from the unit, and a spring stored in the unit that biases the needle-type voltage measurement terminals against the side faces of the separators of the fuel cell stack by an elastic force.
  • the invention is therefore based on the object of overcoming the aforementioned disadvantages and developing a solution for a fuel cell stack in order to safely and reliably contact a large number of parallel bi-polar plates in order to tap off the cell voltage and then connect this to a measurement and evaluation electronics. Furthermore, it must be ensured that the corresponding contact also makes contact with the correct contact opening in the bipolar plate without being damaged and that a good contact force is achieved there.
  • a basic idea of the invention is that a specifically shaped, resilient contact part, which has the shape of a "loop", springs in laterally when it is inserted into the corresponding contact pockets in the loop section.
  • the width of the wire loop in the loop section is larger than the opening width on the side of the mating contact, in order to achieve reliable contact. Due to the loop design, a deflection on both sides is achieved.
  • the wire loop can also be inserted transversely to the direction of insertion by means of a connecting link. be deflected elastically. In this way, the connection can be made overall with a low but defined insertion force and a high contact force can be generated in the fully inserted state.
  • pre-centering can be achieved for better fixation via the housing, which provides a guide leg or guide ribs for this purpose.
  • a cell contacting unit is therefore provided, specifically for electrically contacting a contact device, which has a housing, of a fuel cell stack with electrical contact sockets arranged in one or more rows and/or columns, the cell contacting unit having spring contact elements at corresponding positions, which extend in the plugging direction (S). extend away from the cell contacting unit, with the spring contact elements forming a wire loop in the shape of the eye of a needle at their plug-side end, which is resiliently compressed when the spring contact elements are inserted into the contact sockets, so that two wire loop sections of the wire loop of the spring contact elements are pressed transversely to the plug-in direction (S) against the contact sockets under the action of spring force.
  • the main component of the spring force which presses the wire loop of the spring contact elements against a side wall of the contact sockets in the plugged-in state, acts transversely to the plug-in direction.
  • the cell contacting unit is designed so that when the spring contact elements of the cell contacting unit are plugged together with the contact sockets of the fuel cell stack, the wire loop of the spring contact elements increasingly closes together during the plugging process due to the shape of the wire loop. be pressed. As a result, the insertion force can be specifically controlled via the insertion path.
  • a further advantageous embodiment of the invention provides that the wire loop is formed as a closed wire loop from at least two curved wire loop sections running next to one another and a bent section connecting these two wire loop sections and formed at the end on the plug side.
  • Another advantage is a design in which the spring contact elements initially penetrate at least their front end into the contact openings of the contact sockets, preferably approximately centrally into the contact openings, before the two wire loop sections come into contact with wall sections of the contact sockets during further connection.
  • Another advantage is a design in which the contact sockets have a contact cavity which, viewed in the direction of insertion, initially has an area with a smaller cross section and then an area with a larger cross section, which clamps the wire loop when it is fully inserted.
  • U-shaped contacts each of which forms two essentially parallel spring contact elements (arranged in pairs), of which each spring contact element is intended to be plugged into a corresponding socket on the contact device of the fuel cell stack.
  • the spring contact elements have a latching geometry at or near their plug-side end, which engages in a counter-latching geometry formed in or on the contact sockets. In this way, the contact arrangement can be held securely.
  • a further aspect of the present invention relates to such a contact arrangement consisting of a fuel cell stack with socket contacts and a cell contacting unit as described above, which is designed to be plugged together with the fuel cell stack in an electrically contacting manner.
  • a likewise further aspect of the present invention relates to a fuel cell comprising a fuel cell stack with a plug-in device formed with socket contacts and a cell contacting unit as described above, which is or can be plugged together with the fuel cell stack in an electrically contacting manner.
  • FIG. 1 shows a schematic sectional view of a detail of a first embodiment of a cell contacting unit according to the invention
  • FIG. 2 shows a schematic sectional view of a detail of an alternative embodiment of the cell contacting unit according to the invention, specifically in a plugged-in position and
  • FIG. 3 shows a perspective sectional view of a cell contacting unit according to the invention, which shows a multiplicity of contacts shaped according to the invention.
  • the figures are schematic by way of example.
  • the same reference numbers in the figures indicate the same functional and/or structural features.
  • FIG. 3 shows a perspective sectional view of a cell contacting unit 100 according to the invention.
  • the cell contacting unit 100 is designed for making electrical contact with electrical contact sockets 21 arranged in a plurality of rows or columns in a housing 22 of a fuel cell stack 20, the cell contacting unit 100 having the spring contact elements 11 shown at corresponding positions for this purpose.
  • the spring contact elements 11 extend in the plug-in direction S out of the cell contacting unit 100 (downward in FIG. 3), with guide ribs 27 being arranged on the housing 22 of the mating plug-in device of the fuel cell stack 20, viewed in the plug-in direction S, in order to ensure pre-centering prior to the actual plug-in process guarantee.
  • FIG. 1 shows a schematic exemplary embodiment of the invention, specifically in the form of a partial detail of a schematic sectional view of a cell contacting unit 100, which is connected to a contact device of a fuel cell stack 20, specifically in a mounting position at the end of the plugging process in the fully plugged-in state.
  • the loop-like spring contact elements 11 are first inserted at least with their front end 11a (front-side bent portion 11a of the wire loop 12) into the contact openings of the contact sockets 21 approximately centrally in the respective contact opening when they are plugged together. After that, the respective lower loop section of the two wire loop sections 12a, 12b of the spring contact elements 11 hits the edge of the opening areas of the contact cavities of the contact sockets 21 as they are further plugged together.
  • front end 11a front-side bent portion 11a of the wire loop 12
  • the contact cavity of the contact socket 21 shows a lower, widened contact-receiving area, in which the wire loop can relax again in a spring-elastic manner to a certain extent, in that the two wire loop sections (or loop sections 12a, 12b) spring back transversely to the insertion direction S towards the wall of the contact sockets 21.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne une unité de mise en contact de cellules (100) pour la mise en contact électrique d'un dispositif de contact d'un empilement de cellules (20), présentant un boîtier (22), avec des douilles de contact électriques (21) disposées en une ou plusieurs rangées et/ou colonnes, l'unité de mise en contact de cellules (100) présentant, au niveau de positions correspondantes, des éléments de contact à ressort (11) qui s'étendent dans la direction d'enfichage (S) à partir de l'unité de mise en contact de cellules (100), les éléments de contact à ressort (11) formant à leur extrémité côté enfichage une boucle de fil métallique (12) en forme de chas d'aiguille qui, lors de l'enfichage des éléments de contact à ressort (11) dans les douilles de contact (21), est comprimée élastiquement de sorte que deux parties de la boucle de fil métallique (12) des éléments de contact à ressort (11) sont poussées, sous l'action de la force de ressort, contre les douilles de contact (21) perpendiculairement à la direction d'enfichage (S).
PCT/EP2022/072322 2021-11-11 2022-08-09 Unité de mise en contact de cellules WO2023083508A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22765417.5A EP4430689A2 (fr) 2021-11-11 2022-08-09 Unité de mise en contact de cellules

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021129433.9A DE102021129433A1 (de) 2021-11-11 2021-11-11 Zellkontaktierungseinheit
DE102021129433.9 2021-11-11

Publications (2)

Publication Number Publication Date
WO2023083508A2 true WO2023083508A2 (fr) 2023-05-19
WO2023083508A3 WO2023083508A3 (fr) 2023-11-23

Family

ID=83228562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/072322 WO2023083508A2 (fr) 2021-11-11 2022-08-09 Unité de mise en contact de cellules

Country Status (3)

Country Link
EP (1) EP4430689A2 (fr)
DE (1) DE102021129433A1 (fr)
WO (1) WO2023083508A2 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002313398A (ja) 2001-04-16 2002-10-25 Mitsubishi Heavy Ind Ltd セル電圧測定用ピックアップユニット

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1426379A (fr) * 1964-12-18 1966-01-28 Perfectionnements apportés aux organes de contact électrique
DE19618611C2 (de) * 1996-03-20 1999-02-04 Ingolf Jasch Selbstverstärkendes Steckverbindungselement
US6135781A (en) * 1996-07-17 2000-10-24 Minnesota Mining And Manufacturing Company Electrical interconnection system and device
DE102007050355A1 (de) 2007-10-09 2009-04-16 Würth Elektronik Ics Gmbh & Co. Kg Schaltelement und Leiterplatte
US8313344B2 (en) 2009-12-30 2012-11-20 Fci Americas Technology Llc Eye-of-the-needle mounting terminal
JP5576436B2 (ja) * 2012-06-21 2014-08-20 本田技研工業株式会社 燃料電池
DE102013206129A1 (de) * 2013-04-08 2014-10-23 Volkswagen Ag Elektrischer Steckverbinder zur Kontaktierung eines Bipolarplattenstapels einer Brennstoffzelle und Bipolarplattenstapel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002313398A (ja) 2001-04-16 2002-10-25 Mitsubishi Heavy Ind Ltd セル電圧測定用ピックアップユニット

Also Published As

Publication number Publication date
WO2023083508A3 (fr) 2023-11-23
EP4430689A2 (fr) 2024-09-18
DE102021129433A1 (de) 2023-05-11

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