EP3644455B1 - Elektrische anschlussanordnung mit thermischer überwachung - Google Patents

Elektrische anschlussanordnung mit thermischer überwachung Download PDF

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Publication number
EP3644455B1
EP3644455B1 EP18202924.9A EP18202924A EP3644455B1 EP 3644455 B1 EP3644455 B1 EP 3644455B1 EP 18202924 A EP18202924 A EP 18202924A EP 3644455 B1 EP3644455 B1 EP 3644455B1
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EP
European Patent Office
Prior art keywords
terminal
axis
cavity
along
temperature
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Active
Application number
EP18202924.9A
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English (en)
French (fr)
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EP3644455A1 (de
Inventor
Heiko BEHRENBECK
Paul G HALBACH
André OEKEN
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.)
Aptiv Technologies Ltd
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Aptiv Technologies Ltd
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Priority to EP18202924.9A priority Critical patent/EP3644455B1/de
Publication of EP3644455A1 publication Critical patent/EP3644455A1/de
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Classifications

    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/422—Securing in resilient one-piece base or case, e.g. by friction; One-piece base or case formed with resilient locking means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • 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
    • 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
    • H01R13/04—Pins or blades for co-operation with sockets
    • H01R13/05—Resilient pins or blades
    • H01R13/052—Resilient pins or blades co-operating with sockets having a circular transverse section
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts

Definitions

  • the present invention relates generally to an electrical terminal assembly that determines a temperature of the terminal-assembly.
  • the present invention relates more particularly to battery charging systems for electric vehicles where a temperature of the electrical-terminals may exceed a specified value, in a relatively short period of time, and cause damage to the charging system.
  • a temperature rise may occur before the temperature sensing device measures the peak temperature due to a thermal latency of the electrical-terminals.
  • EP 3 190 396 A1 discloses a terminal-assembly, comprising a wire-cable having an outer insulation-layer and an exposed-end extending beyond the outer insulation-layer; an electrical-terminal having a first-end and a second-end opposite the first-end; the first-end defining an attachment-zone bonded with the exposed-end; and a housing having a cavity wherein a temperature-sensor is disposed within the cavity and is configured to detect a temperature of the electrical-terminal.
  • EP 2 738 562 A1 discloses a battery sensor for measuring charging current.
  • the present invention proposes to solve the above mentioned problem by providing a terminal-assembly that includes a wire-cable, an electrical-terminal, a housing, and a temperature-sensor.
  • the wire-cable has an outer insulation-layer and an exposed-end extending beyond the outer insulation-layer.
  • the electrical-terminal has a first-end and a second-end opposite the first-end.
  • the first-end has a generally T-shape and defines an attachment-zone bonded with the exposed-end.
  • the housing has a skirt that defines a first-cavity and a cap that defines a second-cavity overlaying the first-cavity, with the first-end disposed within the first-cavity.
  • the cap defines an aperture aligned with a lateral-axis of the housing.
  • the first-cavity is electrically isolated from the second-cavity by a partition extending along the lateral-axis.
  • the partition overlays the exposed-end of the wire-cable.
  • the skirt extends from the partition toward the second-end of the electrical-terminal along the mating-axis and defines a slot configured to slideably engage the terminal-head.
  • the skirt has locking-features configured to releasably lock around the shaft when the terminal-head is fully inserted into the slot.
  • the temperature-sensor is disposed within the second-cavity and extends through the aperture. The temperature-sensor is configured to detect a temperature of the electrical-terminal and is in direct contact with a first-portion of the partition
  • FIG. 1 is an exploded perspective view illustrating the overall structure of the terminal-assembly 10.
  • the terminal-assembly 10 includes a wire-cable 12 having an outer insulation-layer 14 and an exposed-end 16 extending beyond the outer insulation-layer 14 (i.e., the outer insulation-layer 14 is stripped away exposing the underlying wire).
  • the wire-cable 12 is preferably formed of an alloy of copper or aluminum and may include a conductive coating, such as tin.
  • the wire-cable 12 may be a solid wire-cable 12, or may be a stranded wire-cable 12, and in the example illustrated in figure 1 is a stranded wire-cable 12.
  • the terminal-assembly 10 also includes an electrical-terminal 18 having a first-end 20 and a second-end 22 opposite the first-end 20.
  • the electrical-terminal 18 is formed of a conductive material, such as an alloy of copper or aluminum, and may include the conductive coating tin.
  • the first-end 20 has a generally T-shape and defines an attachment-zone 24 bonded (e.g., welded) with the exposed-end 16 of the wire-cable 12.
  • the weld may be any type of weld that creates a metallurgical bond, and in the example illustrated in figure 1 is an ultrasonic weld.
  • the first-end 20 further defines a terminal-head 26 extending from the attachment-zone 24 toward the second-end 22 along a mating-axis 28 of the electrical-terminal 18 and terminating at a first-shoulder 30.
  • the terminal-head 26 has a generally cylindrical-shape that defines a first-diameter 32.
  • the terminal-head 26 also has opposed flattened sides to aid in an assembly of the terminal-assembly 10, as will be described in more detail below.
  • the first-end 20 further defines a shaft 34 extending from the first-shoulder 30 toward the second-end 22 along the mating-axis 28 and terminating at a second-shoulder 36.
  • the shaft 34 also has the generally cylindrical-shape and defines a second-diameter 38 that is less than the first-diameter 32.
  • the shaft 34 has a continuous circular cross section (i.e., no flat sides).
  • the terminal-assembly 10 also includes a housing 40.
  • the housing 40 has a skirt 42 that defines a first-cavity 44 and a cap 46 that defines a second-cavity 48 overlaying the first-cavity 44, wherein the first-end 20 of the electrical-terminal 18 is disposed within the first-cavity 44 (see figure 2a ).
  • the housing 40 is formed of a polymeric dielectric material.
  • the polymeric dielectric material may be any polymeric dielectric material capable of electrically isolating portions of the electrical-terminal 18, and is preferably a polyamide (NYLON).
  • the polymeric dielectric material may include a fiber fill (glass or other fiber) to increase a temperature resistance and a strength of the housing 40.
  • the cap 46 defines an aperture 50 aligned with a lateral-axis 52 of the housing 40 configured to permit access to the second-cavity 48 along the lateral-axis 52.
  • the first-cavity 44 is electrically isolated from the second-cavity 48 by a partition 54 extending along the lateral-axis 52 and overlays the exposed-end 16 of the wire-cable 12 (see figure 2a ).
  • the partition 54 forms a "ceiling" to the first-cavity 44 and forms a "floor" to the second-cavity 48, thereby creating a boundary between the first-cavity 44 and the second-cavity 48.
  • the skirt 42 extends from the partition 54 toward the second-end 22 of the electrical-terminal 18 along the mating-axis 28 and defines a slot 56 configured to slideably engage the opposed flattened sides of the terminal-head 26.
  • the slot 56 exists on both sides of the skirt 42, as illustrated in figure 1 .
  • the skirt 42 has locking-features 58 configured to releasably lock around the shaft 34 when the terminal-head 26 is fully inserted into the slot 56. That is, the skirt 42 is configured to flex outwardly as the shaft 34 engages the locking-features 58 then returns to a neutral position locking around the shaft 34 when the electrical-terminal 18 is fully seated in the first-cavity 44.
  • a temperature-sensor 60 is disposed within the second-cavity 48 extending through the aperture 50 (see figure 2a ).
  • the temperature-sensor 60 may be any temperature-sensor 60 configured to detect a temperature of the electrical-terminal 18, and in the example illustrated in figure 1 is a 2-wire negative temperature coefficient type (NTC-type) temperature-sensor 60.
  • NTC-type 2-wire negative temperature coefficient type
  • the temperature-sensor 60 in direct contact with a first-portion 62 of the partition 54, as illustrated in figures 2a to 2b .
  • the first-portion 62 of the partition 54 is distal to the aperture 50.
  • Figures 2a to 2b are section views of the assembled terminal-assembly 10 viewed along the mating-axis 28.
  • the partition 54 has a thickness 64 of between 1.0mm and 1.5mm.
  • the thickness 64 in this range has the technical benefit of electrically isolating the temperature-sensor 60 from the exposed-end 16 of the wire-cable 12, yet provides sufficient response-time for the temperature-sensor 60 to detect the temperature rise in the electrical-terminal 18.
  • an adhesive 66 such as an epoxy or other adhesive 66 suitable for the operating temperatures of the terminal-assembly 10 (that may be in excess of 125 degrees Celsius), is interposed between and in direct contact with both the exposed-end 16 of the wire-cable 12 and the partition 54, as illustrated in figure 2b .
  • the adhesive 66 has the technical benefit of improving heat conduction between the exposed-end 16 and the partition 54, and improves the response-time for the temperature-sensor 60 to detect the temperature rise in the electrical-terminal 18. Preferably, any air-gap is eliminated by the presence of the adhesive 66.
  • the temperature-sensor 60 is retained within the second-cavity 48 with a locking-element 68 configured to releasably-lock to an outer-surface 70 of the housing 40.
  • the locking-element 68 may be formed of the same polymeric material as the housing 40.
  • the locking-element 68 includes a platform 72 extending into the aperture 50 and overlays a second-portion 74 of the partition 54, as illustrated in figure 2b .
  • the second-portion 74 of the partition 54 is proximal to the aperture 50.
  • the platform 72 defines a leading-edge 76 in direct contact with a trailing-edge 78 of the temperature-sensor 60, thereby inhibiting a removal of the temperature-sensor 60 along the lateral-axis 52 when the locking-element 68 is locked to the housing 40.
  • a pair of opposed locking-tabs 80 extend from a first-side 82 and a second-side 84 of the platform 72 along the lateral-axis 52 and engage a corresponding pair of locking-ramps 86 extending from the outer-surface 70 of the housing 40.
  • the locking-element 68 includes a flange 88 that engages the housing 40 at the aperture 50 and overlays an exposed-edge 90 of the partition 54 that inhibits a movement of the locking-element 68 along the lateral-axis 52.
  • FIG. 3 is a perspective view of the housing 40 isolated from the terminal-assembly 10 and illustrates the internal surfaces of the first-cavity 44 and the second-cavity 48.
  • the housing 40 includes a plurality of guide-beams 92 extending from a back-wall 94 of the second-cavity 48 along the lateral-axis 52.
  • the plurality of guide-beams 92 are configured to inhibit a movement of the temperature-sensor 60 along the mating-axis 28, and movement along a longitudinal-axis 96 orthogonal to both the mating-axis 28 and the lateral-axis 52.
  • Each of the plurality of guide-beams 92 include chamfers to assist in the insertion of the temperature-sensor 60 into the second-cavity 48.
  • the housing 40 also includes a stop 98 extending from the back-wall 94 along the lateral-axis 52 that is configured to inhibit the movement of the temperature-sensor 60 along the lateral-axis 52. It will be appreciated that the stop 98 of the housing 40 and the flange 88 of the locking-element 68 provide the technical benefit of maintaining a position of the temperature-sensor 60 within the second-cavity 48.
  • Figures 4a to 4b illustrate the assembled terminal-assembly 10 in a side view, and end view , and a top perspective view, respectively.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Claims (10)

  1. Anschluss-Baugruppe (10), umfassend:
    ein Drahtkabel (12) mit einer äußeren Isolationsschicht (14) und einem freiliegenden Ende (16), das sich über die äußere Isolationsschicht (14) hinaus erstreckt;
    einen elektrischen Anschluss (18) mit einem ersten Ende (20) und einem zweiten Ende (22) entgegengesetzt zu dem ersten Ende (20);
    wobei das erste Ende (20) eine Befestigungszone (24) definiert, die mit dem freiliegenden Ende (16) verbunden ist;
    ein Gehäuse (40) mit einem zweiten Hohlraum (48);
    einen Temperatursensor (60), der in dem zweiten Hohlraum (48) angeordnet ist, wobei der Temperatursensor (60) zum Erfassen einer Temperatur des elektrischen Anschlusses (18) konfiguriert ist,
    dadurch gekennzeichnet, dass
    das erste Ende (20) im Allgemeinen eine T-Form aufweist;
    das erste Ende (20) ferner einen Anschlusskopf (26) definiert, der sich von der Befestigungszone (24) in Richtung des zweiten Endes (22) entlang einer Steckachse (28) des elektrischen Anschlusses (18) erstreckt und an einem ersten Absatz (30) endet, wobei der Anschlusskopf (26) eine allgemein zylindrische Form aufweist, die einen ersten Durchmesser (32) definiert;
    das erste Ende (20) ferner einen Schaft (34) definiert, der sich von dem ersten Absatz (30) in Richtung des zweiten Endes (22) entlang der Steckachse (28) erstreckt und an einem zweiten Absatz (36) endet,
    der Schaft (34) die allgemein zylindrische Form aufweist und einen zweiten Durchmesser (38) definiert, wobei der zweite Durchmesser (38) kleiner als der erste Durchmesser (32) ist;
    ein Gehäuse (40) eine Randleiste (42), die einen ersten Hohlraum (44) definiert, und eine Kappe (46) aufweist, die einen zweiten Hohlraum (48) definiert, der über dem ersten Hohlraum (44) liegt, wobei das erste Ende (20) innerhalb des ersten Hohlraums (44) angeordnet ist;
    die Kappe (46) eine Öffnung (50) definiert, die mit einer Querachse (52) des Gehäuses (40) ausgerichtet ist;
    der erste Hohlraum (44) von dem zweiten Hohlraum (48) durch eine Trennwand (54) elektrisch isoliert ist, die sich entlang der Querachse (52) erstreckt, wobei die Trennwand (54) über dem freiliegenden Ende (16) des Drahtkabels (12) liegt;
    sich die Randleiste (42) von der Trennwand (54) in Richtung des zweiten Endes (22) des elektrischen Anschlusses (18) entlang der Steckachse (28) erstreckt und einen Schlitz (56) definiert, der konfiguriert ist, um gleitend mit dem Anschlusskopf (26) in Eingriff zu kommen;
    wobei die Randleiste (42) Verriegelungsmerkmale (58) aufweist, die konfiguriert sind, um lösbar um den Schaft (34) herum zu verriegeln, wenn der Anschlusskopf (26) vollständig in den Schlitz (56) eingeführt ist;
    und der Temperatursensor (60) innerhalb des zweiten Hohlraums (48) angeordnet ist, der sich durch die Öffnung (50) erstreckt und in direktem Kontakt mit einem ersten Abschnitt (62) der Trennwand (54) steht.
  2. Anschluss-Baugruppe (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Trennwand (54) eine Dicke (64) zwischen 1,0 mm und 1,5 mm aufweist.
  3. Anschluss-Baugruppe (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Klebstoff (66) zwischen sowohl dem freiliegenden Ende (16) des Drahtkabels (12) als auch der Trennwand (54) angeordnet ist und mit diesen in direktem Kontakt steht.
  4. Anschluss-Baugruppe (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Temperatursensor (60) in dem zweiten Hohlraum (48) mit einem Verriegelungselement (68) festgehalten wird, das so konfiguriert ist, dass es lösbar mit einer Außenfläche (70) des Gehäuses (40) verriegelt.
  5. Anschluss-Baugruppe (10) nach Anspruch 4, dadurch gekennzeichnet, dass das Verriegelungselement (68) eine Plattform (72) aufweist, die sich in die Öffnung (50) hinein erstreckt und einen zweiten Abschnitt (74) der Trennwand (54) überlagert, wobei die Plattform (72) eine Vorderkante (76) definiert, die in direktem Kontakt mit einer Hinterkante (78) des Temperatursensors (60) steht, wodurch ein Entfernen des Temperatursensors (60) entlang der Querachse (52) verhindert wird.
  6. Anschluss-Baugruppe (10) nach Anspruch 5, dadurch gekennzeichnet, dass sich ein Paar einander gegenüberliegender Verriegelungslaschen (80) von einer ersten Seite (82) und einer zweiten Seite (84) der Plattform (72) aus entlang der Querachse (52) erstreckt, wobei das Paar einander gegenüberliegender Verriegelungslaschen (80) in ein entsprechendes Paar von Verriegelungsrampen (86) eingreift, die sich von der Außenfläche (70) des Gehäuses (40) aus erstrecken.
  7. Anschluss-Baugruppe (10) nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Verriegelungselement (68) einen Flansch (88) aufweist, der an der Öffnung (50) in das Gehäuse (40) eingreift und eine Bewegung des Verriegelungselements (68) entlang der Querachse (52) verhindert.
  8. Anschluss-Baugruppe (10) nach Anspruch 7, dadurch gekennzeichnet, dass der Flansch (88) eine freiliegende Kante (90) der Trennwand (54) überlagert.
  9. Anschluss-Baugruppe (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (40) mehrere Führungsbalken (92) aufweist, die sich von einer Rückwand (94) des zweiten Hohlraums (48) entlang der Querachse (52) erstrecken, wobei die mehreren Führungsbalken (92) so konfiguriert sind, dass sie eine Bewegung des Temperatursensors (60) entlang der Steckachse (28) und entlang einer Längsachse (96) orthogonal zu sowohl der Steckachse (28) als auch der Querachse (52) verhindern.
  10. Anschluss-Baugruppe (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (40) einen Anschlag (98) aufweist, der sich von einer Rückwand (94) des zweiten Hohlraums (48) entlang der Querachse (52) erstreckt, wobei der Anschlag (98) so konfiguriert ist, dass er eine Bewegung des Temperatursensors (60) entlang der Querachse (52) verhindert.
EP18202924.9A 2018-10-26 2018-10-26 Elektrische anschlussanordnung mit thermischer überwachung Active EP3644455B1 (de)

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EP18202924.9A EP3644455B1 (de) 2018-10-26 2018-10-26 Elektrische anschlussanordnung mit thermischer überwachung

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DE102020116904A1 (de) 2020-06-26 2021-12-30 Te Connectivity Germany Gmbh Hochstromkontakteinrichtung und Verbindungsvorrichtung zur Stromübertragung von elektrischer Energie in einem Kraftfahrzeug
JP7468334B2 (ja) 2020-12-21 2024-04-16 住友電装株式会社 端子アセンブリ及び充電用コネクタ

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ES2534391T3 (es) * 2012-11-30 2015-04-22 Isabellenhütte Heusler Gmbh & Co.Kg Sensor de batería
US10115503B2 (en) * 2016-01-07 2018-10-30 Yazaki North America, Inc. Terminal-thermistor assembly

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