DE102014016478A1 - Electrical connector - Google Patents

Electrical connector

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Publication number
DE102014016478A1
DE102014016478A1 DE102014016478.0A DE102014016478A DE102014016478A1 DE 102014016478 A1 DE102014016478 A1 DE 102014016478A1 DE 102014016478 A DE102014016478 A DE 102014016478A DE 102014016478 A1 DE102014016478 A1 DE 102014016478A1
Authority
DE
Germany
Prior art keywords
temperature
heat radiation
8th
radiation sensor
contact element
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.)
Pending
Application number
DE102014016478.0A
Other languages
German (de)
Inventor
Dr. Richwin Matthias
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.)
Leopold Kostal GmbH and Co KG
Original Assignee
Leopold Kostal GmbH and Co KG
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 Leopold Kostal GmbH and Co KG filed Critical Leopold Kostal GmbH and Co KG
Priority to DE102014016478.0A priority Critical patent/DE102014016478A1/en
Publication of DE102014016478A1 publication Critical patent/DE102014016478A1/en
Application status is Pending legal-status Critical

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/70Structural association with built-in electrical component with built-in switch
    • H01R13/713Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H01R13/7137Structural association with built-in electrical component with built-in switch the switch being a safety switch with thermal interrupter
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/665Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683Structural association with built-in electrical component with built-in electronic circuit with built-in sensor

Abstract

Described is an electrical connector having at least one electrical contact element and a connector housing, in which a temperature sensor is arranged, which detects the temperature of at least one contact element, wherein the temperature sensor is an electrical heat radiation sensor.

Description

  • The invention relates to an electrical connector having at least one electrical contact element and a connector housing, in which a temperature sensor is arranged, which detects the temperature of at least one contact element.
  • Particularly in the case of connectors which transmit high currents, it is known to provide temperature sensors inside connector housings. If a too high temperature is detected in time, a protection circuit connected to the temperature sensor can interrupt the flow of current to prevent a thermal overload of the connector.
  • As temperature sensors usually temperature-dependent resistors are used (which are also referred to as thermistors or more specifically as PTC or NTC resistors or cold or hot conductor), which use the temperature dependence of the resistance of metals or semiconductors to produce a temperature-dependent electrical measurement.
  • In principle, thermistors detect their own temperature. Therefore, if the temperature of an object is to be determined by means of a temperature-dependent resistor, then it is necessary to couple the temperature sensor thermally as possible well to this object so that it can assume its temperature by heat conduction. Insufficient thermal coupling results in inaccurate temperature measurements and time delays in detecting temperature changes.
  • A generic connector is from the German patent application DE 100 40 601 A1 known. The connector described in this document is in particular provided for on-board power supply of aircraft and has a temperature sensor which extends at least partially outside the surface along a contact element.
  • Such a direct thermal coupling of temperature sensors to the contact elements of connectors is not without problems. High temperatures, which can have a critical effect, are to be expected due to possible contact resistance, especially at the contact points of the contact elements of interconnected connectors. Especially at these points, however, it is unfavorable to install temperature sensors, since they can affect the mechanical and thus also the electrical properties of the connector here.
  • A connection of a temperature sensor to a contact element, such as a spring tongue should therefore be as far away as possible from the contact point. However, this has the disadvantage that the temperature sensor then reacts only slowly to temperature changes at the contact point, since the heat propagation through heat conduction to the temperature sensor requires a certain amount of time. Another disadvantage is that the detection of the temperature of the contact point due to temperature gradients between the contact point and the temperature sensor is also relatively inaccurate. For safety reasons, a protection circuit controlled by the temperature sensor must therefore already react to relatively low detected temperature increases, and this may possibly cause unnecessary safety shutdowns in individual cases.
  • The mechanical properties of contact elements, such as spring tongues or flat connectors, are the least affected if the temperature sensor is located in the area of the line connection, for example in the crimp area. In this case, it is disadvantageous that a temperature sensor at these points is practically not pre-assembled, but can be attached only after the crimping of the lines. As a result, usually increase the cost and the cost of installation.
  • Another disadvantage of thermistors is that they can detect only the temperature of a contact element due to the required direct thermal coupling to the measurement object. In multi-pin connectors, it may therefore be necessary to provide a plurality of thermistors and monitor their signals through a multi-channel measuring circuit, which leads to a considerable effort.
  • It has set itself the task of creating a connector which avoids the aforementioned disadvantages or at least significantly reduced.
  • This object is achieved in that the temperature sensor is an electrical heat radiation sensor.
  • A particular advantage of a heat radiation sensor is that it does not require a direct mechanical coupling to a measurement object. Therefore, when used inside the housing of a connector, a thermal radiation sensor does not affect or affect either the mechanical properties of the contact elements or the electrical properties of the connector as a whole.
  • It is also advantageous that the heat radiation sensor can be precisely aligned with a measuring point and thus the temperature of this Measuring point can capture quite accurately. As a measuring point can preferably be selected a contact point at which touch the contact elements of two interconnected connectors.
  • Since a heat radiation sensor is arranged at a distance from the intended measuring location, a heat radiation sensor, with a suitable design and arrangement, can even detect the heat radiation emanating from a plurality of measuring points at the same time. The given number of contact elements of a multi-pin connector can therefore be monitored by a small number of heat radiation sensors, ideally already by a single. Thus, the disadvantage of the higher cost of a thermal radiation sensor relative to a thermistor, and may even be reversed by a smaller required number at a cost advantage.
  • The principle of the invention is illustrated by the single figure sketchy. The figure shows schematically a section through two interconnected connectors 10 . 20 , The connector housing 2 of the mating connector 20 engages a part of the connector housing 1 of the connector 10 , Inside the assembled connector housing 1 . 2 lies a contact element 3 of the connector 10 , which may be formed by way of example as a spring tongue, on a mating contact element 4 of the mating connector 20 on, which may be designed for example as a flat plug. The end portion of the contact element 3 forms a spring contact 5 off, at a relatively narrow contact point 6 on the mating contact element 4 is applied. The temperature at the narrow contact point 6 , at which the two contact elements 3 . 4 touch is through a heat radiation sensor 8th supervised.
  • The heat radiation sensor 8th is on the inside wall 9 of the connector housing 1 directly above the spring contact 5 arranged. The heat radiation sensor 8th "Looks" after connecting the connector housing 1 . 2 to the contact point 6 so that from the contact point 6 outgoing heat radiation 7 also on the detection range of the heat radiation sensor 8th falls. Preferably, the heat radiation sensor 8th designed for detecting a long-wave infrared radiation in the wavelength range λ> 10 microns.
  • Since no heat conduction is required here for the temperature detection, detects the heat radiation sensor 8th the temperature at the contact point 6 practically without a time delay and without falsification by a temperature gradient between the contact point 6 and the temperature sensor 8th ,
  • Is the detection range of the heat radiation sensor 8th formed sufficiently large, it may also be the temperature of several mutually parallel contact points 6 but only one of them is shown in the figure. This is easily possible because it is not necessary to detect overheating of the connector assembly, the specific temperature values at the individual contact points 6 to resolve distinctively. Instead, it is sufficient if the heat radiation sensor 8th concerning all contact points 6 determine the maximum temperature, due to which a safety circuit, if necessary, the flow of current across all contact points 6 can interrupt.
  • Particularly advantageous, the connector according to the invention form a high-current connector, which can be used for example in an electrically driven motor vehicle. An exemplary embodiment of such a connector is in German Offenlegungsschrift DE 10 2009 016 157 A1 shown.
  • In electric vehicles high current connectors already in normal operation currents of several hundred amps and are of course designed to withstand significantly higher peak currents for a short time. In the case of extreme fault conditions, such as short circuits, however, it is possible for currents to be generated which can not be intercepted by the robust design of the connectors. In this case, the connector would be thermally destroyed and further damage could result.
  • But even without short circuits thermal overloads can occur, such as when at the contact points 6 between contact elements 3 . 4 Transition resistances R Ü occur. Contact resistances R Ü arise, for example, as a result of damage to contact elements 3 . 4 due to mechanical loads (vibrations) or through during the manufacture of the contact elements 3 . 4 unrecognized material defects.
  • Because of the relationship P V = R U × I 2 , very high power losses P V occur even at normally high currents I. However, external safety measures usually only respond to excessive currents I and thus can not detect a thermal overload and therefore can not eliminate them.
  • A thermal overload must therefore be detected as precisely as possible by a temperature sensor and above all as quickly as possible, so that a protective circuit can trigger a shutdown before a greater damage can occur. For these reasons is especially for Protection of high current connectors a heat radiation sensor much more advantageous than a temperature-dependent resistor.
  • LIST OF REFERENCE NUMBERS
  • 1
    first connector housing
    2
    second connector housing
    3
    Contact element (spring tongue)
    4
    Counter contact element (flat connector)
    5
    spring contact
    6
    Contact point (s)
    7
    Heat radiation (long-wave infrared radiation)
    8th
    Heat radiation sensor (temperature sensor)
    9
    inner wall
    10
    Connectors
    20
    mating connector
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 10040601 A1 [0005]
    • DE 102009016157 A1 [0019]

Claims (6)

  1. Electrical connector ( 10 ) with at least one electrical contact element ( 3 ) and with a connector housing ( 1 ), in which a temperature sensor ( 8th ) is arranged, the temperature of at least one contact element ( 3 ), characterized in that the temperature sensor ( 8th ) is an electrical heat radiation sensor.
  2. Electrical connector according to claim 1, characterized in that the heat radiation sensor ( 8th ) on an inner wall ( 9 ) of the connector housing ( 1 ) is arranged.
  3. Electrical connector according to claim 1, characterized in that the heat radiation sensor ( 8th ) the contact element ( 3 ), whose temperature it detects, not touched.
  4. Electrical connector according to claim 1, characterized in that the heat radiation sensor ( 8th ) to the designated contact point ( 6 ) between the contact element ( 3 ) and a mating contact element ( 4 ) an attachable mating connector ( 20 ) is aligned.
  5. Electrical connector according to claim 1, characterized in that the heat radiation sensor ( 8th ) is an infrared radiation sensor.
  6. Electrical connector according to claim 5, characterized in that the infrared radiation sensor ( 8th ) a long-wave infrared radiation ( 7 ) is detected in the wavelength range λ> 10 μm.
DE102014016478.0A 2014-11-07 2014-11-07 Electrical connector Pending DE102014016478A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102014016478.0A DE102014016478A1 (en) 2014-11-07 2014-11-07 Electrical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014016478.0A DE102014016478A1 (en) 2014-11-07 2014-11-07 Electrical connector

Publications (1)

Publication Number Publication Date
DE102014016478A1 true DE102014016478A1 (en) 2016-05-12

Family

ID=55802645

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102014016478.0A Pending DE102014016478A1 (en) 2014-11-07 2014-11-07 Electrical connector

Country Status (1)

Country Link
DE (1) DE102014016478A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040601A1 (en) 2000-08-16 2002-03-07 Fladung Gmbh Manfred Electrical plug connector has contact(s) associated with monitoring temperature sensor directly contact by contact or mounted in metal block in surface contact with contact element
US20080013239A1 (en) * 2006-03-28 2008-01-17 Kopelman Robert Z Electrical fire prevention from over-temperature conditions
DE102009016157A1 (en) 2009-04-03 2010-10-07 Kostal Kontakt Systeme Gmbh Shielded connector assembly
DE102012200523A1 (en) * 2011-02-23 2012-08-23 Lear Corporation Thermal detection and control of a wall plug
DE202012008085U1 (en) * 2012-08-23 2012-09-25 Abb Ag Electric socket with temperature control
DE102012202051A1 (en) * 2011-02-10 2012-09-27 Lear Corporation Heat protection system for electrical device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040601A1 (en) 2000-08-16 2002-03-07 Fladung Gmbh Manfred Electrical plug connector has contact(s) associated with monitoring temperature sensor directly contact by contact or mounted in metal block in surface contact with contact element
US20080013239A1 (en) * 2006-03-28 2008-01-17 Kopelman Robert Z Electrical fire prevention from over-temperature conditions
DE102009016157A1 (en) 2009-04-03 2010-10-07 Kostal Kontakt Systeme Gmbh Shielded connector assembly
DE102012202051A1 (en) * 2011-02-10 2012-09-27 Lear Corporation Heat protection system for electrical device
DE102012200523A1 (en) * 2011-02-23 2012-08-23 Lear Corporation Thermal detection and control of a wall plug
DE202012008085U1 (en) * 2012-08-23 2012-09-25 Abb Ag Electric socket with temperature control

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