EP3622547B1 - Pyrotechnic disconnector - Google Patents

Pyrotechnic disconnector Download PDF

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Publication number
EP3622547B1
EP3622547B1 EP18718830.5A EP18718830A EP3622547B1 EP 3622547 B1 EP3622547 B1 EP 3622547B1 EP 18718830 A EP18718830 A EP 18718830A EP 3622547 B1 EP3622547 B1 EP 3622547B1
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EP
European Patent Office
Prior art keywords
circuit breaker
conductor structure
pyrotechnic
link arm
conductor
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EP18718830.5A
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German (de)
French (fr)
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EP3622547A1 (en
Inventor
Martin Burger
Peter Steiner
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Leoni Bordnetz Systeme GmbH
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Leoni Bordnetz Systeme GmbH
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Publication of EP3622547A1 publication Critical patent/EP3622547A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H2039/008—Switching devices actuated by an explosion produced within the device and initiated by an electric current using the switch for a battery cutoff

Definitions

  • the invention relates to a pyrotechnic circuit breaker, in particular for an on-board network of a motor vehicle, having a conductor structure with two connection arms and with a connection arm electrically conductively connecting the two connection arms, and having a pyrotechnic unit and a separating body for severing the connection arm when triggered.
  • a pyrotechnic circuit breaker also called a pyrotechnic fuse element, is not a protective device for protecting a current path against overcurrents, as is the case with fuses, for example.
  • the pyrotechnic circuit breaker also called pyrotechnic circuit breaker, pyrotechnic safety switch, pyrotechnic separating element or pyrotechnic switch for short, is a type of emergency stop switch of stop category 0 (EN ISO 13850:2008 item 4.1.4 and EN 60204-1: 2006 point 9.2.2), which can be triggered manually and/or is automatically controlled and triggered under specified conditions.
  • the pyrotechnic circuit breaker is constructed according to a principle known per se. It comprises a pyrotechnic propellant charge, which is typically ignited by an electrical ignition signal, in particular a sensor signal from a connected sensor, and as a result accelerates a separating body, usually a wedge or a bolt, so that it mechanically severs an electrical conductor, usually a conductor strip.
  • an electrical ignition signal in particular a sensor signal from a connected sensor
  • a separating body usually a wedge or a bolt
  • the invention is based on the object of specifying an advantageously designed pyrotechnic disconnector.
  • a corresponding pyrotechnic circuit breaker is preferably designed for an on-board power supply of a motor vehicle and has a conductor structure with two connection arms and with a connection arm that electrically conductively connects the two connection arms.
  • one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms forms an output connection for a current discharge line, so that the current inflow line can then be connected or is connected to the current discharge line via the connecting arm.
  • the pyrotechnic circuit breaker has a pyrotechnic unit and a separating body for severing the connecting arm and thus for separating the connecting arms in the event of a trip.
  • the pyrotechnic unit is expediently constructed according to a principle known per se and, for example, is accommodated in a housing together with the separating body.
  • the pyrotechnic circuit breaker is designed in such a way that a retaining fuse made of an insulating material, for example a plastic, adheres to the conductor structure, which is designed, for example, as a one-piece, one-piece current-carrying sheet metal or as a busbar, and that if it is triggered, a separating piece is separated from the connecting arm, wherein the separating piece is held by the securing device, ie in particular in a fixed position relative to the rest of the conductor structure.
  • a retaining fuse made of an insulating material, for example a plastic
  • the holding structure thus prevents a separating piece, which is severed when triggered, from wandering around as a result of forces that occur subsequently and consequently causing damage, ie a short circuit, for example.
  • the separating out of a separating piece in turn serves primarily to avoid arcing or at least to reduce the risk of an arc forming after a trip event.
  • the essential idea here can be seen in the fact that, instead of a single point of separation, several, ie at least two, points of separation are generated in the event of a trip.
  • the multiplication of the separation points means that any residual voltage that may be present across the conductor structure after a trip event is distributed over the individual separation points.
  • a series connection with several switches or loads, whereby the total voltage drop across the series connection results from the sum of the partial voltages across the individual switches or loads according to Kirchhoff's mesh rule.
  • the separating piece is preferably further held by the securing device in such a way that it remains in its original position even after it has been triggered. It is particularly important here that the separating piece, which is separated from the connecting frame when triggered, is subsequently electrically insulated, but is still held mechanically and is therefore not present as a loose element or part.
  • a configuration in which the securing device is connected to the separating piece on the one hand and to the rest of the conductor structure on the other hand is particularly expedient here, that is to say it adheres mechanically and/or extensively to the conductor structure, for example.
  • the securing device is formed by a casting compound, which adheres to the conductor structure and is, for example, injection-molded onto the conductor structure or glued to the conductor structure. In this way, the securing device can be implemented with relatively little technical effort.
  • the conductor structure is then designed as a stamped sheet metal, for example made of aluminum or a copper alloy, and the securing device is injection-molded onto the corresponding stamped sheet metal.
  • the conductor structure is formed by a corresponding stamped sheet metal
  • the stamped sheet metal has at least one recess and in particular at least one recess penetrating the stamped sheet metal and if the at least one recess is at least partially filled with the insulating material to form the securing device.
  • Corresponding insulating material is further preferably only positioned in corresponding recesses of the stamped sheet metal, so that no insulating material or any part of the securing device is arranged on the upper side and/or on the underside of the stamped sheet metal.
  • the securing device is then implemented using a very small amount of insulating material and in addition, in such a case, no external projections are attached to the flexible die, so that the external dimensions of the flexible die with retaining device correspond to the external dimensions of the flexible die without retaining device.
  • the conductor structure is applied to the securing device, the securing device forming, for example, a type of printed circuit board or circuit board with the conductor structure.
  • the conductor structure is designed for lower current intensities.
  • the connecting arm is also formed by a conductor strip or a conductor track, in particular a single, continuous conductor strip or a corresponding conductor track, which has a curved and in particular U-shaped course in one section.
  • the separating piece severed in the event of a trigger then typically also has a curved and in particular a U-shaped course.
  • the securing device is more preferably positioned on the inside of the curved section and in particular between the legs of the U-shaped course.
  • the connecting arm has an S-shaped and in particular a meandering course, the connecting arm also in this case being formed by a conductor strip or a conductor track, in particular a single, continuous conductor strip or a corresponding conductor track.
  • one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms forms an output connection for a current discharge line, so that the current inflow line can then be connected or is connected to the current discharge line via the connecting arm.
  • the disconnecting body cuts through the connecting arm along a single disconnecting line when it is triggered and, in the process, in particular also disconnects the disconnecting piece from the connecting arm.
  • the connecting arm is then typically U-shaped, S-shaped or meander-shaped.
  • the separating line then intersects the conductor strip at at least two spatially separate positions along the course of the conductor strip and the conductor strip is severed at least two spatially separate positions along the course of the conductor strip when triggered.
  • the two connecting arms are positioned on the same side of the pyrotechnic unit and/or the separating body, according to an embodiment variant adapted to a corresponding application.
  • the two connection arms are positioned on different sides of the pyrotechnic unit and/or the separating body, for example on opposite sides.
  • an embodiment of the conductor structure is preferred in which it has only two connection arms as an input connection and an output connection and no further connection. Accordingly, the conductor structure is then kept relatively simple.
  • pyrotechnic circuit breaker is designed such that in the event of a trigger several separate separators from the Connection arm are cut out, each separator is held by the retaining fuse or by its own retaining fuse in a fixed position relative to the rest of the conductor structure.
  • the pyrotechnic unit of the pyrotechnic circuit breaker is preferably kept simple and constructed according to a basic principle known per se.
  • the pyrotechnic unit expediently includes a pyrotechnic charge and an electrical igniter with a signal input, so that a trigger signal or ignition signal can be fed into the igniter via the signal input, which activates the igniter and thus triggers the ignition of the pyrotechnic charge.
  • the ignited pyrotechnic propellant charge in turn accelerates the separating body, which is typically wedge-like or thorn-like and thus has a type of cutting edge or cutting edge, so that it is driven towards the connecting arm and the separating piece is subsequently severed. In this way, feeding in a trip signal ultimately results in galvanic isolation of the connection arms.
  • the signal input of the igniter is connected to a signal generator, which specifies the triggering condition for the pyrotechnical circuit breaker, i.e. when a specified condition occurs, the Trigger case, a trigger signal generated and transmitted to the pyrotechnic switch.
  • a corresponding pyrotechnic circuit breaker is installed in a motor vehicle, for example, an airbag control unit in the motor vehicle serves as a signal transmitter, so that if an airbag in the motor vehicle is triggered, the pyrotechnic circuit breaker is also triggered, i.e. the pyrotechnic propellant charge is ignited.
  • the pyrotechnic circuit breaker is then triggered in the event of a traffic accident, with the pyrotechnic circuit breaker typically being integrated into the vehicle electrical system in such a way that, after a traffic accident, the electrical energy sources of the motor vehicle are, as it were, isolated and separated from the rest of the vehicle electrical system .
  • the illustrated pyrotechnic circuit breaker 2 is designed for use in an on-board power supply of a motor vehicle and is accordingly used in a non-illustrated on-board power supply of a motor vehicle.
  • the pyrotechnic circuit breaker 2 comprises a pyrotechnic unit, which is not explicitly shown and is constructed according to a principle known per se, and a separating body 4, the pyrotechnic unit and the separating body 4 being in one 1 indicated housing 6 are housed.
  • Part of the pyrotechnic circuit breaker 2 is also a conductor structure 8, which in the exemplary embodiment is formed by a stamped sheet metal and is accordingly formed in one piece and in one piece.
  • the conductor structure 8 can be divided into three different functional areas, specifically into two connection arms 10 and a connection arm 12, which mechanically and electrically conductively connects the two connection arms 10 to one another in an initial state.
  • connection arms 10 protrude in the exemplary embodiment according to FIG 1 out of the housing 6 and are positioned on opposite sides of the pyrotechnic circuit breaker 2 .
  • the two connection arms 10 are positioned on the same side of the pyrotechnic unit 2, the conductor structure 8 then for example according to FIG figure 5 or according to 6 is designed. Regardless of the positioning of the two connection arms 10 in the installed state of the pyrotechnic disconnector 2, one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms 10 forms an output connection for a current discharge line.
  • the connecting arm 12 is severed by the separating body 4 according to a principle known per se, as a result of which the connecting arms 10 are mechanically and electrically separated from one another, which ultimately also leads to a separation of the power supply line and current discharge line leads.
  • the pyrotechnic circuit breaker 2 is designed in such a way that a separating piece 14 is separated from the connecting arm 12 if it is triggered. In this way, in the event of tripping or disconnection, several disconnection points are implemented along a potential current path and in this way the risk of formation of an arc is additionally reduced or it is ensured in this way that no arc can form.
  • the pyrotechnical isolating switch 2 is also designed in such a way that a retaining lock 16 made of an insulating material, for example a plastic, adheres to the conductor structure 8, which the separating piece 14 after a trigger case holds. That separating piece 14 is expediently held in a fixed position relative to the rest of the conductor structure 8 and accordingly the separating piece 14 is preferably connected to the rest of the conductor structure 8 via the securing device 16 .
  • the securing device 16 is further preferably formed by a casting compound which adheres to the conductor structure 8 and is, for example, injection-molded onto the conductor structure 8 or glued to the conductor structure 8 .
  • the conductor structure 8 is formed by a stamped sheet metal, which has at least one recess 18 penetrating the stamped sheet metal in the area of the connecting arm 12 .
  • Those recesses 18 are at least partially filled with a casting compound made of a plastic and more preferably completely filled to form the securing device 16 .
  • the casting compound is only in the recesses 18, so that the respective flexible dies are otherwise free of the corresponding casting compound, that is to say in particular they have no casting compound on the upper side and on the underside. So there are almost only gaps filled with the appropriate casting compound.
  • the separating body 4 is indicated in such a way that the connecting arm 12 is severed only along a single separating line 20 .
  • a continuous severing along the severing line 20 with a continuous cutting edge in which both the conductor structure 8 and the insulating material of the retaining fuse 16 are severed.
  • the conductor structure 8 has a curved course, at least in the area of the connecting arm 12, with the connecting arm 12 being formed by a single, continuous conductor strip 22 which is then, for example, U-shaped, S-shaped or meander-shaped history.
  • the separating body cuts through the conductor strip 22 at a plurality of spatially spaced positions, so that in any case at least one separating piece 14 is severed when triggered.
  • the dividing line 20 intersects the conductor strip in at least two spatially separated sections along the course of the conductor strip 22 .
  • the course of the conductor strip 22 corresponds to a good approximation to the potential current path and accordingly the potential current path is then interrupted at several points in the event of a trip.
  • the invention is not limited to the embodiment described above.

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Description

Die Erfindung betrifft einen pyrotechnischen Trennschalter, insbesondere für ein Bordnetz eines Kraftfahrzeuges, aufweisend eine Leiterstruktur mit zwei Anschlussarmen und mit einem die beiden Anschlussarme elektrisch leitend verbindenden Verbindungsarm sowie aufweisend eine pyrotechnische Einheit und einen Trennkörper zur Durchtrennung des Verbindungsarms im Auslösefall.The invention relates to a pyrotechnic circuit breaker, in particular for an on-board network of a motor vehicle, having a conductor structure with two connection arms and with a connection arm electrically conductively connecting the two connection arms, and having a pyrotechnic unit and a separating body for severing the connection arm when triggered.

Bei einem pyrotechnischer Trennschalter, auch pyrotechnisches Sicherungselement genannt, handelt es sich nicht um eine Schutzvorrichtung zur Absicherung eines Strompfades gegen Überströme, wie dies beispielsweise bei Schmelzsicherungen der Fall ist. Stattdessen handelt es sich bei dem pyrotechnischer Trennschalter, auch pyrotechnischer Schutzschalter, pyrotechnischer Sicherheitsschalter, pyrotechnisches Trennelement oder kurz pyrotechnischer Schalter genannt, um eine Art Notausschalter der Stopp-Kategorie 0 (EN ISO 13850:2008 Pkt. 4.1.4 und EN 60204-1:2006 Pkt. 9.2.2), welcher sich manuell auslösen lässt und/oder unter vorgegebenen Bedingungen automatisch angesteuert und ausgelöst wird.A pyrotechnic circuit breaker, also called a pyrotechnic fuse element, is not a protective device for protecting a current path against overcurrents, as is the case with fuses, for example. Instead, the pyrotechnic circuit breaker, also called pyrotechnic circuit breaker, pyrotechnic safety switch, pyrotechnic separating element or pyrotechnic switch for short, is a type of emergency stop switch of stop category 0 (EN ISO 13850:2008 item 4.1.4 and EN 60204-1: 2006 point 9.2.2), which can be triggered manually and/or is automatically controlled and triggered under specified conditions.

Aus dem Dokument US 2017/0076890 A1 ist ein pyrotechnischer Trennschalter für ein Fahrzeug bekannt.From the document U.S. 2017/0076890 A1 a pyrotechnic circuit breaker for a vehicle is known.

Hierbei ist der pyrotechnische Trennschalter nach einem an sich bekannten Prinzip aufgebaut. Er umfasst einen pyrotechnischen Treibsatz, der typischerweise durch ein elektrisches Zündsignal, insbesondere ein Sensorsignal eines angeschlossenen Sensors, gezündet wird und infolgedessen einen Trennkörper, meist ein Keil oder ein Bolzen, beschleunigt, so dass dieser einen elektrischen Leiter, meist einen Leiterstreifen, mechanisch durchtrennt. Hierdurch wird die durch den elektrischen Leiter gegebene elektrische Verbindung, beispielsweise zwischen einer elektrischen Energiequelle, zum Beispiel einer Batterie in einem Kraftfahrzeug, und einem angeschlossenen Strompfad mit diversen Verbrauchern unterbrochen. Aufgrund dieses Funktionsprinzips wird ein solcher pyrotechnischer Trennschalter mitunter auch als Batterietrennschalter bezeichnet.Here, the pyrotechnic circuit breaker is constructed according to a principle known per se. It comprises a pyrotechnic propellant charge, which is typically ignited by an electrical ignition signal, in particular a sensor signal from a connected sensor, and as a result accelerates a separating body, usually a wedge or a bolt, so that it mechanically severs an electrical conductor, usually a conductor strip. As a result, the electrical connection provided by the electrical conductor, for example between an electrical energy source, for example a battery in a motor vehicle, and a connected current path with various consumers interrupted. Because of this functional principle, such a pyrotechnic circuit breaker is sometimes also referred to as a battery circuit breaker.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, einen vorteilhaft ausgebildeten pyrotechnischer Trennschalter anzugeben.Proceeding from this, the invention is based on the object of specifying an advantageously designed pyrotechnic disconnector.

Diese Aufgabe wird erfindungsgemäß gelöst durch einen pyrotechnischer Trennschalter mit den Merkmalen des Anspruchs 1. Bevorzugte Weiterbildungen sind in den rückbezogenen Ansprüchen enthalten.This object is achieved according to the invention by a pyrotechnic circuit breaker having the features of claim 1. Preferred developments are contained in the dependent claims.

Ein entsprechender pyrotechnischer Trennschalter ist dabei bevorzugt für ein Bordnetz eines Kraftfahrzeuges ausgelegt und weist eine Leiterstruktur mit zwei Anschlussarmen und mit einem die beiden Anschlussarme elektrisch leitend verbindenden Verbindungsarm auf. Hierbei bildet typischerweise zumindest im verbauten Zustand des pyrotechnischen Trennschalters einer der zwei Anschlussarme einen Eingangsanschluss für eine Stromzuflussleitung und der andere der zwei Anschlussarme einen Ausgangsanschluss für eine Stromabführleitung aus, so dass dann die Stromzuflussleitung über den Verbindungsarm mit der Stromabführleitung verbindbar oder verbunden ist.A corresponding pyrotechnic circuit breaker is preferably designed for an on-board power supply of a motor vehicle and has a conductor structure with two connection arms and with a connection arm that electrically conductively connects the two connection arms. Typically, at least when the pyrotechnic disconnector is in the installed state, one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms forms an output connection for a current discharge line, so that the current inflow line can then be connected or is connected to the current discharge line via the connecting arm.

Weiter weist der pyrotechnische Trennschalter eine pyrotechnische Einheit und einen Trennkörper zur Durchtrennung des Verbindungsarms und somit zur Trennung der Anschlussarme im Auslösefall auf. Die pyrotechnische Einheit ist dabei zweckdienlicherweise nach an sich bekanntem Prinzip aufgebaut und beispielsweise zusammen mit dem Trennkörper in einem Gehäuse untergebracht. Außerdem ist der pyrotechnische Trennschalter derart gestaltet, dass an der Leiterstruktur, welche beispielsweise als einteiliges, einstückiges Stromführungsblech oder als Stromschiene ausgestaltet ist, eine Haltesicherung aus einem Isoliermaterial, beispielsweise einem Kunststoff, anhaftet und dass im Auslösefall ein Trennstück aus dem Verbindungsarm herausgetrennt wird, wobei das Trennstück durch die Haltesicherung gehalten wird, also insbesondere in einer festen Relativposition zur übrigen Leiterstruktur.Furthermore, the pyrotechnic circuit breaker has a pyrotechnic unit and a separating body for severing the connecting arm and thus for separating the connecting arms in the event of a trip. The pyrotechnic unit is expediently constructed according to a principle known per se and, for example, is accommodated in a housing together with the separating body. In addition, the pyrotechnic circuit breaker is designed in such a way that a retaining fuse made of an insulating material, for example a plastic, adheres to the conductor structure, which is designed, for example, as a one-piece, one-piece current-carrying sheet metal or as a busbar, and that if it is triggered, a separating piece is separated from the connecting arm, wherein the separating piece is held by the securing device, ie in particular in a fixed position relative to the rest of the conductor structure.

Durch die Haltestruktur wird somit verhindert, dass ein im Auslösefall herausgetrenntes Trennstück durch nachfolgend auftretende Kräfte herumwandert und infolgedessen einen Schaden verursacht, also beispielsweise einen Kurzschluss.The holding structure thus prevents a separating piece, which is severed when triggered, from wandering around as a result of forces that occur subsequently and consequently causing damage, ie a short circuit, for example.

Das Heraustrennen eines Trennstücks wiederum dient in erster Linie der Vermeidung von Lichtbögen oder zumindest der Reduzierung der Gefahr, dass sich ein Lichtbogen nach einem Auslösefall bildet. Die wesentliche Idee hierbei ist darin zu sehen, dass anstelle einer einzigen Trennstelle mehrere, also zumindest zwei, Trennstellen im Auslösefall erzeugt werden. Die Vervielfachung der Trennstellen führt dazu, dass sich eine gegebenenfalls nach einem Auslösefall über der Leiterstruktur anliegende Restspannung auf die einzelnen Trennstellen verteilt. Zum vereinfachten Verständnis kann man sich hierbei eine Reihenschaltung mit mehreren Schaltern oder Verbrauchern vorstellen, wobei sich nach der kirchhoffschen Maschenregel die über der Reihenschaltung abfallende Gesamtspannung aus der Summe der Teilspannungen über den einzelnen Schaltern bzw. Verbrauchern ergibt. Wird also die Anzahl der Trennstellen erhöht, so kann prinzipiell eine höhere Spannung zwischen den Anschlußarmen angelegt werden, ohne dass hierdurch die Gefahr für einen Lichtbogeneffekt steigt. Grundsätzlich kann dabei davon ausgegangen werden, dass ein Lichtbogen, je nach Material der Leiterstruktur, erst bei einer Spannung von ca. 13 Volt entsteht. Daraus folgt, dass die Anzahl der Trennstellen so ausgelegt werden muss, dass bei einem Auslösefall die Spannung an den einzelnen Trennstellen unter der kritischen Spannung von etwa 13 Volt bleibt.The separating out of a separating piece in turn serves primarily to avoid arcing or at least to reduce the risk of an arc forming after a trip event. The essential idea here can be seen in the fact that, instead of a single point of separation, several, ie at least two, points of separation are generated in the event of a trip. The multiplication of the separation points means that any residual voltage that may be present across the conductor structure after a trip event is distributed over the individual separation points. To simplify understanding, one can imagine a series connection with several switches or loads, whereby the total voltage drop across the series connection results from the sum of the partial voltages across the individual switches or loads according to Kirchhoff's mesh rule. If the number of separation points is increased, then in principle a higher voltage can be applied between the connection arms without the risk of an arcing effect increasing as a result. Basically, it can be assumed that an arc, depending on the material of the conductor structure, only occurs at a voltage of approx. 13 volts. From this it follows that the number of separation points must be designed in such a way that in the event of a trip, the voltage at the individual separation points remains below the critical voltage of around 13 volts.

Die Idee, mehrere Trennstellen zu realisieren und ein Trennstück aus der Leiterstruktur herauszutrennen ist dabei als eigenständiger erfinderischer Ansatz anzusehen, der unabhängig ist, von der Idee, eine Haltestruktur vorzusehen. Alle hier beschriebenen Ausführungsvarianten des pyrotechnischen Trennschalters lassen sich daher prinzipiell auch ohne eine entsprechende Haltesicherung realisieren und für einige Anwendungsfälle werden entsprechende Ausgestaltungen auch realisiert. Die Einreichung einer hierauf gerichteten Anmeldung bleibt daher ausdrücklich vorbehalten.The idea of realizing several separation points and separating a separation piece from the conductor structure is to be regarded as an independent inventive approach that is independent of the idea of providing a holding structure. All embodiment variants of the pyrotechnic circuit breaker described here can therefore in principle also be implemented without a corresponding holding device and corresponding configurations are also implemented for some applications. The filing of an application aimed at this is therefore expressly reserved.

Bevorzugt wird das Trennstück weiter durch die Haltesicherung derart gehalten, dass dieses auch nach einem Auslösefall an seiner ursprünglichen Position verbleibt. Wesentlich ist hierbei insbesondere, dass das Trennstück, welches im Auslösefall aus dem Verbindungsrahmen herausgetrennt wird, nachfolgend elektrisch isoliert ist, mechanisch jedoch weiterhin gehalten wird und somit nicht als loses Element oder Teil vorliegt.The separating piece is preferably further held by the securing device in such a way that it remains in its original position even after it has been triggered. It is particularly important here that the separating piece, which is separated from the connecting frame when triggered, is subsequently electrically insulated, but is still held mechanically and is therefore not present as a loose element or part.

Zweckdienlich ist hierbei insbesondere eine Ausgestaltung, bei der die Haltesicherung mit dem Trennstück einerseits und mit der übrigen Leiterstruktur andererseits verbunden ist, also beispielsweise mechanisch und/oder flächig an der Leiterstruktur anhaftet.A configuration in which the securing device is connected to the separating piece on the one hand and to the rest of the conductor structure on the other hand is particularly expedient here, that is to say it adheres mechanically and/or extensively to the conductor structure, for example.

Gemäß einer vorteilhaften Ausgestaltung ist die Haltesicherung hierbei durch eine Gussmasse ausgebildet, welche an der Leiterstruktur anhaftet und beispielsweise an die Leiterstruktur angespritzt oder mit der Leiterstruktur verklebt ist. Auf diese Weise lässt sich die Haltesicherung mit einem relativ geringen technischen Aufwand realisieren.According to an advantageous embodiment, the securing device is formed by a casting compound, which adheres to the conductor structure and is, for example, injection-molded onto the conductor structure or glued to the conductor structure. In this way, the securing device can be implemented with relatively little technical effort.

Gemäß einer vorteilhaften Weiterbildung ist die Leiterstruktur dann als ein Stanzblech, beispielsweise aus Aluminium oder aus einer Kupferlegierung, ausgebildet und die Haltesicherung ist an das entsprechende Stanzblech angespritzt.According to an advantageous development, the conductor structure is then designed as a stamped sheet metal, for example made of aluminum or a copper alloy, and the securing device is injection-molded onto the corresponding stamped sheet metal.

Ist die Leiterstruktur durch ein entsprechendes Stanzblech ausgebildet, so ist es weiter von Vorteil, wenn das Stanzblech zumindest eine Ausnehmung und insbesondere zumindest eine das Stanzblech durchsetzende Ausnehmung aufweist und wenn die zumindest eine Ausnehmung zur Ausbildung der Haltesicherung zumindest teilweise mit dem Isoliermaterial aufgefüllt ist. Hierbei ist entsprechendes Isoliermaterial weiter bevorzugt lediglich in entsprechenden Ausnehmungen des Stanzbleches positioniert, sodass sich an der Oberseite und/oder an der Unterseite des Stanzbleches keinerlei Isoliermaterial oder keinerlei Bestandteil der Haltesicherung angeordnet ist. Im Falle einer solchen Ausführungsvariante ist dann die Haltesicherung mittels einer sehr geringen Menge an Isoliermaterial realisiert und zudem werden in einem solchen Fall keine äußeren Anformungen an das Stanzblech angebracht, sodass die äußeren Abmessungen des Stanzbleches mit Haltesicherung den äußeren Abmessungen des Stanzbleches ohne Haltesicherung entsprechen.If the conductor structure is formed by a corresponding stamped sheet metal, it is also advantageous if the stamped sheet metal has at least one recess and in particular at least one recess penetrating the stamped sheet metal and if the at least one recess is at least partially filled with the insulating material to form the securing device. Corresponding insulating material is further preferably only positioned in corresponding recesses of the stamped sheet metal, so that no insulating material or any part of the securing device is arranged on the upper side and/or on the underside of the stamped sheet metal. In the case of such an embodiment variant, the securing device is then implemented using a very small amount of insulating material and in addition, in such a case, no external projections are attached to the flexible die, so that the external dimensions of the flexible die with retaining device correspond to the external dimensions of the flexible die without retaining device.

Einer alternativen Ausgestaltung entsprechend ist die Leiterstruktur auf die Haltesicherung aufgetragen, wobei die Haltesicherung mit der Leiterstruktur beispielsweise eine Art Leiterplatte oder Leiterplatine ausbildet. Eine derartige Ausgestaltung ist insbesondere dann zweckdienlich, wenn die Leiterstruktur für geringere Stromstärken ausgelegt ist.In accordance with an alternative embodiment, the conductor structure is applied to the securing device, the securing device forming, for example, a type of printed circuit board or circuit board with the conductor structure. Such a configuration is particularly useful when the conductor structure is designed for lower current intensities.

Je nach Anwendungszweck ist der Verbindungsarm des Weiteren durch einen Leiterstreifen oder eine Leiterbahn, insbesondere einen einzigen, durchgehenden Leiterstreifen oder eine entsprechende Leiterbahn, ausgebildet, der in einem Abschnitt einen gebogenen und insbesondere einen U-förmigen Verlauf aufweist. In einem solchen Fall weist dann typischerweise auch das in einem Auslösefall herausgetrennte Trennstück einen gebogenen und insbesondere einen U-förmigen Verlauf auf. Die Haltesicherung ist bei einer derartigen Ausgestaltung weiter bevorzugt innenseitig am gebogenen Abschnitt und insbesondere zwischen den Schenkeln des U-förmigen Verlaufs positioniert.Depending on the application, the connecting arm is also formed by a conductor strip or a conductor track, in particular a single, continuous conductor strip or a corresponding conductor track, which has a curved and in particular U-shaped course in one section. In such a case, the separating piece severed in the event of a trigger then typically also has a curved and in particular a U-shaped course. In such a configuration, the securing device is more preferably positioned on the inside of the curved section and in particular between the legs of the U-shaped course.

Einer weiteren Ausgestaltungsvariante entsprechend weist der Verbindungsarm einen S-förmigen und insbesondere einen mäanderförmigen Verlauf auf, wobei der Verbindungsarm auch in diesem Fall durch einen Leiterstreifen oder eine Leiterbahn, insbesondere einen einzigen, durchgehenden Leiterstreifen oder eine entsprechende Leiterbahn ausgebildet ist.According to a further embodiment variant, the connecting arm has an S-shaped and in particular a meandering course, the connecting arm also in this case being formed by a conductor strip or a conductor track, in particular a single, continuous conductor strip or a corresponding conductor track.

Die Idee, einen pyrotechnischen Trennschalter aufweisend eine Leiterstruktur mit zwei Anschlussarmen und mit einem die beiden Anschlussarme elektrisch leitend verbindenden Verbindungsarm zu realisieren, wobei der Verbindungsarm einen mäanderförmigen Verlauf aufweist, ist dabei wiederum als eigenständiger erfinderischer Ansatz anzusehen, der unabhängig ist, von den zuvor beschriebenen Ideen. Speziell wird dabei die Kombination der Merkmale des Oberbegriffs des Anspruchs 1 mit den Merkmalen eines oder mehrerer der Ansprüche 5 bis 9 als eigenständig erfinderisch angesehen. Die Einreichung einer hierauf gerichteten Anmeldung bleibt daher wiederum ausdrücklich vorbehalten. Hierbei bildet typischerweise zumindest im verbauten Zustand des pyrotechnischen Trennschalters einer der zwei Anschlussarme einen Eingangsanschluss für eine Stromzuflussleitung und der andere der zwei Anschlussarme einen Ausgangsanschluss für eine Stromabführleitung aus, so dass dann die Stromzuflussleitung über den Verbindungsarm mit der Stromabführleitung verbindbar oder verbunden ist.The idea of realizing a pyrotechnic circuit breaker having a conductor structure with two connection arms and with a connection arm that electrically conductively connects the two connection arms, with the connection arm having a meandering course, is in turn to be regarded as an independent inventive approach that is independent of the ones described above ideas. In particular, the combination of the features of the generic term of Claim 1 with the features of one or more of claims 5 to 9 as independently inventive. The filing of an application aimed at this is again expressly reserved. Typically, at least when the pyrotechnic disconnector is in the installed state, one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms forms an output connection for a current discharge line, so that the current inflow line can then be connected or is connected to the current discharge line via the connecting arm.

Von Vorteil ist zudem eine Ausgestaltung des pyrotechnischen Trennschalters, bei der der Trennkörper den Verbindungsarm im Auslösefall entlang einer einzigen Trennlinie durchtrennt und dabei insbesondere auch das Trennstück aus dem Verbindungsarm heraustrennt. Hierbei ist der Verbindungsarm dann typischerweise U-förmig, S-förmig oder mäanderförmig. Infolgedessen schneidet die Trennlinie dann den Leiterstreifen an zumindest zwei räumlich voneinander getrennten Positionen entlang des Verlaufs des Leiterstreifens und der Leiterstreifen wird im Auslösefall an zumindest zwei räumlich voneinander getrennten Positionen entlang des Verlaufs des Leiterstreifens durchtrennt.Also advantageous is a configuration of the pyrotechnic disconnector in which the disconnecting body cuts through the connecting arm along a single disconnecting line when it is triggered and, in the process, in particular also disconnects the disconnecting piece from the connecting arm. In this case, the connecting arm is then typically U-shaped, S-shaped or meander-shaped. As a result, the separating line then intersects the conductor strip at at least two spatially separate positions along the course of the conductor strip and the conductor strip is severed at least two spatially separate positions along the course of the conductor strip when triggered.

Unabhängig von der Ausgestaltung des Verbindungsarms sind die beiden Anschlussarme gemäß einer an einen entsprechenden Anwendungszweck angepassten Ausführungsvariante an der gleichen Seite der pyrotechnischen Einheit und/oder des Trennkörpers positioniert. Für andere Anwendungszwecke sind die beiden Anschlussarme an verschiedenen, beispielsweise an gegenüberliegenden, Seiten der pyrotechnischen Einheit und/oder des Trennkörpers positioniert.Irrespective of the configuration of the connecting arm, the two connecting arms are positioned on the same side of the pyrotechnic unit and/or the separating body, according to an embodiment variant adapted to a corresponding application. For other purposes of use, the two connection arms are positioned on different sides of the pyrotechnic unit and/or the separating body, for example on opposite sides.

Bevorzugt ist hierbei eine Ausgestaltung der Leiterstruktur, bei der diese lediglich zwei Anschlussarme als einen Eingangsanschluss und einen Ausgangsanschluss aufweist und keinen weiteren Anschluss. Dementsprechend ist die Leiterstruktur dann relativ einfach gehalten.In this case, an embodiment of the conductor structure is preferred in which it has only two connection arms as an input connection and an output connection and no further connection. Accordingly, the conductor structure is then kept relatively simple.

Gemäß einer weiteren Ausführungsvariante ist der pyrotechnische Trennschalter derart ausgestaltet, dass im Auslösefall mehrere separate Trennstücke aus dem Verbindungsarm herausgetrennt werden, wobei jedes Trennstück durch die Haltesicherung oder durch eine eigene Haltesicherung in einer festen Relativposition zur übrigen Leiterstruktur gehalten wird.According to a further embodiment of the pyrotechnic circuit breaker is designed such that in the event of a trigger several separate separators from the Connection arm are cut out, each separator is held by the retaining fuse or by its own retaining fuse in a fixed position relative to the rest of the conductor structure.

Weiter ist die pyrotechnische Einheit des pyrotechnischen Schutzschalters bevorzugt einfach gehalten und nach an sich bekanntem Grundprinzip aufgebaut. Dabei umfasst die pyrotechnische Einheit zweckdienlicher Weise einen pyrotechnischen Treibsatz sowie einen elektrischen Zünder mit einem Signaleingang, so dass über den Signaleingang ein Auslösesignal oder Zündsignal in den Zünder eingespeist werden kann, welches den Zünder aktiviert und damit die Zündung des pyrotechnischen Treibsatzes auslöst. Der gezündete pyrotechnische Treibsatz wiederum beschleunigt den Trennkörper, welche typischerweise keilartig oder dornartig ausgestaltet ist und somit eine Art Schneide oder Trennschneide aufweist, so dass dieser auf den Verbindungsarm zugetrieben wird und in der Folge das Trennstück herausgetrennt wird. Somit bewirkt die Einspeisung eines Auslösesignals letzten Endes eine galvanische Trennung der Anschlussarme.Furthermore, the pyrotechnic unit of the pyrotechnic circuit breaker is preferably kept simple and constructed according to a basic principle known per se. The pyrotechnic unit expediently includes a pyrotechnic charge and an electrical igniter with a signal input, so that a trigger signal or ignition signal can be fed into the igniter via the signal input, which activates the igniter and thus triggers the ignition of the pyrotechnic charge. The ignited pyrotechnic propellant charge in turn accelerates the separating body, which is typically wedge-like or thorn-like and thus has a type of cutting edge or cutting edge, so that it is driven towards the connecting arm and the separating piece is subsequently severed. In this way, feeding in a trip signal ultimately results in galvanic isolation of the connection arms.

Im Rahmen des Einbaus des pyrotechnischen Schutzschalters, also im Rahmen der Einbindung in einen Strompfad oder Stromkreis, wird der Signaleingang des Zünders signaltechnisch mit einem Signalgeber verbunden, durch welchen die Auslösebedingung für den pyrotechnischen Schutzschalter vorgegeben wird, der also beim Eintreten einer vorgegebenen Bedingung, dem Auslösefall, ein Auslösesignal generiert und an den pyrotechnischen Schalter übermittelt. Ist nun ein entsprechender pyrotechnischer Schutzschalter beispielsweise in einem Kraftfahrzeug verbaut, so dient zum Beispiel ein Airbag-Steuergerät im Kraftfahrzeug als Signalgeber, sodass im Falle eines Auslösens eines Airbags im Kraftfahrzeug auch der pyrotechnische Schutzschalter ausgelöst wird, also der pyrotechnische Treibsatz gezündet wird. Die Auslösung des pyrotechnischen Schutzschalters erfolgt dann, im Falle eines Verkehrsunfalls, wobei der pyrotechnische Schutzschalter hierbei typischer Weise derart in das Bordnetz des Kraftfahrzeuges eingebunden ist, dass durch die Auslösung elektrische Energiequellen des Kraftfahrzeuges nach einem Verkehrsunfall quasi isoliert und vom übrigen Kraftfahrzeug-Bordnetz getrennt werden. Dadurch wird verhindert, dass unfallbedingt freiliegende und/oder beschädigte elektrische Kabelverbindungen oder aber freiliegende und/oder beschädigte Elektronikkomponenten ein Risiko, insbesondere für Rettungskräfte, darstellen, also zum Beispiel auslaufendes Öl oder Benzin entzünden.As part of the installation of the pyrotechnical circuit breaker, i.e. as part of the integration into a current path or circuit, the signal input of the igniter is connected to a signal generator, which specifies the triggering condition for the pyrotechnical circuit breaker, i.e. when a specified condition occurs, the Trigger case, a trigger signal generated and transmitted to the pyrotechnic switch. If a corresponding pyrotechnic circuit breaker is installed in a motor vehicle, for example, an airbag control unit in the motor vehicle serves as a signal transmitter, so that if an airbag in the motor vehicle is triggered, the pyrotechnic circuit breaker is also triggered, i.e. the pyrotechnic propellant charge is ignited. The pyrotechnic circuit breaker is then triggered in the event of a traffic accident, with the pyrotechnic circuit breaker typically being integrated into the vehicle electrical system in such a way that, after a traffic accident, the electrical energy sources of the motor vehicle are, as it were, isolated and separated from the rest of the vehicle electrical system . This prevents accidentally exposed and/or damaged electrical cable connections or exposed and/or damaged electronic components pose a risk, especially for rescue workers, e.g. igniting leaking oil or petrol.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand einer schematischen Zeichnung näher erläutert. Darin zeigen:

FIG 1
in einer perspektivischen Ansicht ein pyrotechnischer Schutzschalter mit einer teilweise in einem Gehäuse einliegenden Leiterstruktur,
FIG 2
in einer perspektivischen Ansicht die Leiterstruktur zusammen mit einem Trennkörper,
FIG 3
in einer perspektivischen Ansicht die Leiterstruktur,
FIG 4
in einer perspektivischen Ansicht eine zweite Ausführung der Leiterstruktur,
FIG 5
in einer perspektivischen Ansicht eine dritte Ausführung der Leiterstruktur sowie
FIG 6
in einer perspektivischen Ansicht eine vierte Ausführung der Leiterstruktur.
Exemplary embodiments of the invention are explained in more detail below using a schematic drawing. Show in it:
FIG 1
in a perspective view, a pyrotechnic circuit breaker with a conductor structure partially embedded in a housing,
FIG 2
in a perspective view the conductor structure together with a separating body,
3
in a perspective view the conductor structure,
FIG 4
in a perspective view a second embodiment of the conductor structure,
5
in a perspective view a third embodiment of the conductor structure and
6
in a perspective view a fourth embodiment of the conductor structure.

Einander entsprechende Teile sind in allen Figuren jeweils mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.

Ein nachfolgend exemplarisch beschriebener und in Fig. 1 dargestellter pyrotechnischer Trennschalter 2 ist für den Einsatz in einem Bordnetz eines Kraftfahrzeuges ausgelegt und wird dementsprechend in einem nicht mit abgebildetem Bordnetz eines Kraftfahrzeuges eingesetzt.An example described below and in 1 The illustrated pyrotechnic circuit breaker 2 is designed for use in an on-board power supply of a motor vehicle and is accordingly used in a non-illustrated on-board power supply of a motor vehicle.

Hierbei umfasst der pyrotechnische Trennschalter 2 eine nicht explizit dargestellte und nach einem an sich bekannten Prinzip aufgebaute pyrotechnische Einheit sowie einen Trennkörper 4, wobei die pyrotechnische Einheit und der Trennkörper 4 in einem in Fig. 1 angedeuteten Gehäuse 6 untergebracht sind.Here, the pyrotechnic circuit breaker 2 comprises a pyrotechnic unit, which is not explicitly shown and is constructed according to a principle known per se, and a separating body 4, the pyrotechnic unit and the separating body 4 being in one 1 indicated housing 6 are housed.

Teil des pyrotechnischen Trennschalters 2 ist weiterhin eine Leiterstruktur 8, welche im Ausführungsbeispiel durch ein Stanzblech ausgebildet ist und dementsprechend einstückig und einteilig ausgebildet ist. Hierbei lässt sich die Leiterstruktur 8 in drei verschiedene Funktionsbereiche unterteilen, und zwar in zwei Anschlussarme 10 und in einen Verbindungsarm 12, der die beiden Anschlussarme 10 in einem Ausgangszustand mechanisch und elektrisch leitend miteinander verbindet.Part of the pyrotechnic circuit breaker 2 is also a conductor structure 8, which in the exemplary embodiment is formed by a stamped sheet metal and is accordingly formed in one piece and in one piece. In this case, the conductor structure 8 can be divided into three different functional areas, specifically into two connection arms 10 and a connection arm 12, which mechanically and electrically conductively connects the two connection arms 10 to one another in an initial state.

Die beiden Anschlussarme 10 ragen im Ausführungsbeispiel gemäß Fig. 1 aus dem Gehäuse 6 heraus und sind an gegenüberliegenden Seiten des pyrotechnischen Trennschalters 2 positioniert. Gemäß einer alternativen Ausführungsvariante sind die beiden Anschlussarme 10 an dergleichen Seite der pyrotechnischen Einheit 2 positioniert, wobei die Leiterstruktur 8 dann beispielsweise gemäß Fig. 5 oder gemäß Fig. 6 ausgestaltet ist. Unabhängig von der Positionierung der beiden Anschlussarme 10 bildet im verbauten Zustand des pyrotechnischen Trennschalters 2 einer der zwei Anschlussarme einen Eingangsanschluss für eine Stromzuflussleitung und der andere der zwei Anschlussarme 10 einen Ausgangsanschluss für eine Stromabführleitung aus.The two connection arms 10 protrude in the exemplary embodiment according to FIG 1 out of the housing 6 and are positioned on opposite sides of the pyrotechnic circuit breaker 2 . According to an alternative embodiment variant, the two connection arms 10 are positioned on the same side of the pyrotechnic unit 2, the conductor structure 8 then for example according to FIG figure 5 or according to 6 is designed. Regardless of the positioning of the two connection arms 10 in the installed state of the pyrotechnic disconnector 2, one of the two connection arms forms an input connection for a current inflow line and the other of the two connection arms 10 forms an output connection for a current discharge line.

Im Auslösefall, also im Falle einer Aktivierung oder einer Auslösung der pyrotechnischen Einheit, erfolgt nach an sich bekanntem Prinzip eine Durchtrennung des Verbindungsarms 12 durch den Trennkörper 4, wodurch die Anschlussarme 10 mechanisch und elektrisch voneinander getrennt werden, was schließlich auch zu einer Trennung von Stromzuflussleitung und Stromabführleitung führt. Der pyrotechnische Trennschalter 2 ist hierbei derart gestaltet, dass im Auslösefall ein Trennstück 14 aus dem Verbindungsarm 12 herausgetrennt wird. Auf diese Weise werden im Auslösefall oder Trennungsfall mehrere Trennstellen entlang eines potentiellen Strompfades realisiert und auf diese Weise wird die Gefahr der Ausbildung eines Lichtbogens zusätzlich verringert oder es wird auf diese Weise sichergestellt, dass sich kein Lichtbogen ausbilden kann.In the event of a trigger, i.e. if the pyrotechnic unit is activated or triggered, the connecting arm 12 is severed by the separating body 4 according to a principle known per se, as a result of which the connecting arms 10 are mechanically and electrically separated from one another, which ultimately also leads to a separation of the power supply line and current discharge line leads. The pyrotechnic circuit breaker 2 is designed in such a way that a separating piece 14 is separated from the connecting arm 12 if it is triggered. In this way, in the event of tripping or disconnection, several disconnection points are implemented along a potential current path and in this way the risk of formation of an arc is additionally reduced or it is ensured in this way that no arc can form.

Damit das im Auslösefall herausgetrennte Trennstück 14 in der Folge nicht als loses Element herumwandern kann, ist der pyrotechnische Trennschalter 2 weiter derart gestaltet, dass an der Leiterstruktur 8 eine Haltesicherung 16 aus einem Isoliermaterial, beispielsweise einem Kunststoff, anhaftet, die das Trennstück 14 nach einem Auslösefall hält. Jenes Trennstück 14 wird dabei zweckdienlicherweise in einer festen Relativposition zur übrigen Leiterstruktur 8 gehalten und dementsprechend ist das Trennstück 14 bevorzugt über die Haltesicherung 16 mit der übrigen Leiterstruktur 8 verbunden. Dabei ist die Haltesicherung 16 weiter bevorzugt durch eine Gussmasse ausgebildet, welche an der Leiterstruktur 8 anhaftet und beispielsweise an die Leiterstruktur 8 angespritzt oder mit der Leiterstruktur 8 verklebt ist.So that the separating piece 14, which is severed out in the event of a trip, cannot subsequently wander around as a loose element, the pyrotechnical isolating switch 2 is also designed in such a way that a retaining lock 16 made of an insulating material, for example a plastic, adheres to the conductor structure 8, which the separating piece 14 after a trigger case holds. That separating piece 14 is expediently held in a fixed position relative to the rest of the conductor structure 8 and accordingly the separating piece 14 is preferably connected to the rest of the conductor structure 8 via the securing device 16 . In this case, the securing device 16 is further preferably formed by a casting compound which adheres to the conductor structure 8 and is, for example, injection-molded onto the conductor structure 8 or glued to the conductor structure 8 .

Im Falle der Ausführungsbeispiele gemäß Fig. 3 bis Fig. 6 ist die Leiterstruktur 8 durch ein Stanzblech ausgebildet, welches zumindest eine das Stanzblech durchsetzende Ausnehmung 18 im Bereich des Verbindungsarms 12 aufweist. Jene Ausnehmungen 18 sind dabei zur Ausbildung der Haltesicherung 16 zumindest teilweise mit einer Gussmasse aus einem Kunststoff aufgefüllt und weiter bevorzugt vollständig aufgefüllt. Dabei befindet sich die Gussmasse lediglich in den Ausnehmungen 18, sodass die jeweiligen Stanzbleche ansonsten frei von entsprechender Gussmasse sind, also insbesondere auf der Oberseite und auf der Unterseite keine Gussmasse aufweisen. Es sind also quasi lediglich Zwischenräume mit der entsprechenden Gussmasse ausgefüllt.In the case of the exemplary embodiments 3 to 6 the conductor structure 8 is formed by a stamped sheet metal, which has at least one recess 18 penetrating the stamped sheet metal in the area of the connecting arm 12 . Those recesses 18 are at least partially filled with a casting compound made of a plastic and more preferably completely filled to form the securing device 16 . In this case, the casting compound is only in the recesses 18, so that the respective flexible dies are otherwise free of the corresponding casting compound, that is to say in particular they have no casting compound on the upper side and on the underside. So there are almost only gaps filled with the appropriate casting compound.

Wie in den Darstellungen gemäß Fig. 2 bis Fig. 6 angedeutet ist der Trennkörper 4 derart ausgestaltet, dass der Verbindungsarm 12 lediglich entlang einer einzigen Trennlinie 20 durchtrennt wird. Dabei erfolgt im Falle der Ausführungsbeispiele gemäß Fig. 2 bis Fig. 4 eine entlang der Trennlinie 20 durchgehende Durchtrennung mit einer durchgehende Schneide, bei der sowohl die Leiterstruktur 8 als auch das Isoliermaterial der Haltesicherung 16 durchtrennt wird.As per the illustrations Figures 2 to 6 the separating body 4 is indicated in such a way that the connecting arm 12 is severed only along a single separating line 20 . In the case of the exemplary embodiments according to FIG Figures 2 to 4 a continuous severing along the severing line 20 with a continuous cutting edge, in which both the conductor structure 8 and the insulating material of the retaining fuse 16 are severed.

Dagegen erfolgt im Falle der beiden Ausführungsbeispiele gemäß Fig. 5 und Fig. 6, also insbesondere im Falle von Ausführungsvarianten des pyrotechnischen Trennschalters 2, bei denen die Anschlussarme 10 an einer Seite des pyrotechnischen Trennschalters 2 positioniert sind, derart, dass lediglich die Leiterstruktur 8 durchtrennt wird, jedoch nicht das Isoliermaterial der Haltesicherung 16. Dies lässt sich problemlos durch eine entsprechend ausgestaltete Schneide mit Unterbrechungen am Trennkörper 4 realisieren.In contrast, in the case of the two exemplary embodiments according to FIG figure 5 and 6 , i.e. in particular in the case of variants of the pyrotechnic circuit breaker 2 in which the connection arms 10 are positioned on one side of the pyrotechnic circuit breaker 2 in such a way that only the conductor structure 8 is severed, but not the insulating material of the retaining fuse 16. This can be done without any problems implement a correspondingly designed cutting edge with interruptions on the separating body 4.

Weiter weist die Leiterstruktur 8 in den hier gezeigten Ausführungsbeispielen einen zumindest im Bereich des Verbindungsarms 12 gebogenen Verlauf auf, wobei der Verbindungsarm 12 durch einen einzigen, durchgehenden Leiterstreifen 22 ausgebildet ist, der dann beispielsweise einen U-förmigen, einen S-förmigen oder einen mäanderförmigen Verlauf aufweist. Infolgedessen erfolgt dann im Auslösefall durch den Trennkörper eine Durchtrennung des Leiterstreifens 22 an mehreren räumlich voneinander beabstandeten Positionen, sodass in jedem Fall zumindest ein Trennstück 14 im Auslösefall herausgetrennt wird. Das heißt, dass die Trennlinie 20 den Leiterstreifen in zumindest zwei räumlich voneinander getrennten Abschnitten entlang des Verlaufs des Leiterstreifens 22 schneidet. Hierbei entspricht der Verlauf des Leiterstreifens 22 in guter Näherung dem potentiellen Strompfad und dementsprechend wird dann der potentielle Strompfad im Auslösefall an mehreren Stellen unterbrochen.Furthermore, in the exemplary embodiments shown here, the conductor structure 8 has a curved course, at least in the area of the connecting arm 12, with the connecting arm 12 being formed by a single, continuous conductor strip 22 which is then, for example, U-shaped, S-shaped or meander-shaped history. As a result, when triggered, the separating body cuts through the conductor strip 22 at a plurality of spatially spaced positions, so that in any case at least one separating piece 14 is severed when triggered. This means that the dividing line 20 intersects the conductor strip in at least two spatially separated sections along the course of the conductor strip 22 . In this case, the course of the conductor strip 22 corresponds to a good approximation to the potential current path and accordingly the potential current path is then interrupted at several points in the event of a trip.

Die Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt.The invention is not limited to the embodiment described above.

BezugszeichenlisteReference List

22
pyrotechnischer Trennschalterpyrotechnic circuit breaker
44
Trennkörperseparator
66
GehäuseHousing
88th
Leiterstrukturladder structure
1010
Anschlussarmconnection arm
1212
Verbindungsarmlink arm
1414
Trennstückseparator
1616
Haltesicherungretainer
1818
Ausnehmungrecess
2020
Trennlinieparting line
2222
Leiterstreifenconductor strips

Claims (9)

  1. Pyrotechnic circuit breaker (2), in particular for an on-board electrical system of a motor vehicle, having a conductor structure (8) with two connecting arms (10) and with a link arm (12) which connects the two connecting arms (10) in an electrically conductive manner, and having a pyrotechnical unit and a separating element (4) for severing the link arm (12) in the event of actuation, characterized in that
    the separating element (4) severs the link arm (12) along a single separating line (20) in the event of actuation, and in that the link arm (12) is formed by a conductor strip (22) with a curved profile, so that the separating line (20) intersects the conductor strip (22) in at least two spatially separated sections along the profile of the conductor strip (22), and in that the separating element (4) and/or the link arm (12) is/are designed in such a way that, in the event of actuation, a separator (14) is separated from the link arm (12).
  2. Pyrotechnic circuit breaker (2) according to claim 1,
    characterised in that
    a retaining mount (16) made of an insulating material adheres to the conductor structure (8) and the separator (14) is retained by the retaining mount (16).
  3. Pyrotechnic circuit breaker (2) according to claim 2,
    characterised in that
    the separator (14) is held by the retaining mount (16) in such a way that it remains in its original position after actuation.
  4. Pyrotechnic circuit breaker (2) according to claim 2 or 3,
    characterised in that
    the retaining mount (16) adheres to the conductor structure (8) as a casting compound, is injection-moulded onto the conductor structure (8) or is bonded to the conductor structure (8).
  5. Pyrotechnic circuit breaker (2) according to one of claims 2 to 4,
    characterised in that
    a stamped sheet forms the conductor structure (8) and in that the retaining mount (16) is injection-moulded onto the stamped sheet.
  6. Pyrotechnic circuit breaker (2) according to one of claims 2 to 5,
    characterised in that
    a stamped sheet forms the conductor structure (8), in that the stamped sheet has at least one recess (18), and in that the at least one recess (18) is at least partially filled with the insulating material to form the retaining mount (16).
  7. Pyrotechnic circuit breaker (1) according to one of claims 1 to 6,
    characterised in that
    the link arm (12) is formed by a conductor strip (22) which has an S-shaped and, in particular, a meander-shaped profile in one section.
  8. Pyrotechnic circuit breaker (2) according to any one of claims 1 to 7,
    characterised in that
    the two connection arms (10) are positioned on the same side of the pyrotechnic unit and/or the separating element (4).
  9. Pyrotechnic circuit breaker (1) according to one of claims 1 to 8,
    characterised in that
    a retaining mount (16) made of an insulating material adheres to the conductor structure (8), and in that the separating element (4) and/or the link arm (12) is/are designed in such a way that, in the event of actuation, a plurality of distinct separators (14) are separated from the link arm (12), each separator (14) being held by the retaining mount (16) in a fixed relative position with respect to the rest of the conductor structure (8).
EP18718830.5A 2017-05-08 2018-04-20 Pyrotechnic disconnector Active EP3622547B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017207735.2A DE102017207735B3 (en) 2017-05-08 2017-05-08 Pyrotechnic disconnector
PCT/EP2018/060207 WO2018206270A1 (en) 2017-05-08 2018-04-20 Pyrotechnic disconnector

Publications (2)

Publication Number Publication Date
EP3622547A1 EP3622547A1 (en) 2020-03-18
EP3622547B1 true EP3622547B1 (en) 2023-06-07

Family

ID=62025878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18718830.5A Active EP3622547B1 (en) 2017-05-08 2018-04-20 Pyrotechnic disconnector

Country Status (3)

Country Link
EP (1) EP3622547B1 (en)
DE (1) DE102017207735B3 (en)
WO (1) WO2018206270A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1330778A (en) 1962-05-08 1963-06-28 High torque self-sustaining spring balance regulator device
US3875431A (en) * 1970-10-16 1975-04-01 Us Navy Destructible microelectronic circuit element
DE102010011150B4 (en) 2010-03-11 2012-03-29 Auto-Kabel Managementgesellschaft Mbh Electrical fuse for motor vehicle power lines and method of manufacture of such fuse
JP5263442B2 (en) * 2011-11-28 2013-08-14 ダイキン工業株式会社 Cutting device
JP5874583B2 (en) 2012-08-29 2016-03-02 豊田合成株式会社 Conduction interruption device
DE102012221664B4 (en) 2012-09-25 2022-04-21 Te Connectivity Germany Gmbh short-circuit switch
EP2996134B1 (en) 2014-09-09 2017-04-26 Airbus Safran Launchers SAS Pyrotechnic circuit breaker with improved cutting of the bus bar
DE102014222230A1 (en) 2014-10-30 2016-05-04 Leoni Bordnetz-Systeme Gmbh Pyrotechnic circuit breaker
JP6406189B2 (en) * 2015-09-11 2018-10-17 豊田合成株式会社 Conduction interruption device
AT517872B1 (en) * 2015-10-19 2017-08-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnic separator

Also Published As

Publication number Publication date
EP3622547A1 (en) 2020-03-18
WO2018206270A1 (en) 2018-11-15
DE102017207735B3 (en) 2018-08-23

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