EP3622548A1 - Pyrotechnic circuit breaker and supply system having a pyrotechnic circuit breaker - Google Patents

Pyrotechnic circuit breaker and supply system having a pyrotechnic circuit breaker

Info

Publication number
EP3622548A1
EP3622548A1 EP18718831.3A EP18718831A EP3622548A1 EP 3622548 A1 EP3622548 A1 EP 3622548A1 EP 18718831 A EP18718831 A EP 18718831A EP 3622548 A1 EP3622548 A1 EP 3622548A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
fuse
pyrotechnic circuit
pyrotechnic
base body
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.)
Granted
Application number
EP18718831.3A
Other languages
German (de)
French (fr)
Other versions
EP3622548B1 (en
Inventor
Tzeichoun Chalil
Peter Steiner
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.)
Leoni Bordnetz Systeme GmbH
Original Assignee
Leoni Bordnetz Systeme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leoni Bordnetz Systeme GmbH filed Critical Leoni Bordnetz Systeme GmbH
Publication of EP3622548A1 publication Critical patent/EP3622548A1/en
Application granted granted Critical
Publication of EP3622548B1 publication Critical patent/EP3622548B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/106—Adaptation for built-in fuses fuse and switch being connected in parallel
    • 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 a motor vehicle, comprising a housing, a pyrotechnic unit and a separating body for severing a current-carrying conductor in the event of tripping.
  • a pyrotechnic circuit breaker also called pyrotechnic fuse element
  • it is not a protection device for securing a current path against overcurrents, as is the case for example with fuses.
  • the pyrotechnic circuit breaker also referred to as a pyrotechnic safety switch, pyrotechnic isolator or short pyrotechnic switch
  • a type of emergency stop switch of stop category 0 EN ISO 13850: 2008 clause 4.1.4 and EN 60204-1: 2006
  • Item 9.2.2 which can be triggered manually and / or automatically activated and triggered under specified conditions.
  • the pyrotechnic circuit breaker is constructed according to a principle known per se. It comprises a pyrotechnic propellant which is typically ignited by an electrical ignition signal, in particular a sensor signal of a connected sensor, and as a result accelerates a separating body, usually a wedge or a bolt, so that it mechanically cuts through an electrical conductor, usually a conductor strip.
  • an electrical ignition signal in particular a sensor signal of a connected sensor
  • a separating body usually a wedge or a bolt
  • a corresponding pyrotechnic circuit breaker is designed in particular for use in a vehicle electrical system of a motor vehicle and is therefore preferably used in a vehicle electrical system of a motor vehicle.
  • the pyrotechnic circuit breaker on a pyrotechnic unit and a separator which are typically housed in a housing.
  • the pyrotechnic unit is expediently constructed according to a principle known per se and accordingly serves to accelerate the separator in the event of triggering the pyrotechnic circuit breaker, so that this cuts through a current-carrying conductor of the pyrotechnic circuit breaker.
  • the conductor in turn is typically formed by a current-carrying metal sheet, for example a stamped sheet metal, and usually has at least two connecting elements or connecting arms, wherein one of the at least two connecting elements typically at least in the installed state of the pyrotechnic circuit breaker as an input terminal for a Stromzultechnisch and the other of the at least two connection elements is formed as an output terminal for a Stromabloom protest.
  • Those two connection elements or connecting arms are then mechanically separated from each other in the case of tripping by the passage of the current-carrying conductor.
  • this is in particular an embodiment of the pyrotechnic circuit breaker, in which the fuse at least until its release, ie until melting the fuse bridges the current-carrying conductor after its severance in the event of triggering the pyrotechnic circuit breaker, ie in particular the separator the severed current-carrying conductor bridged.
  • the fuse is preferably not connected to the current-carrying conductor or at least only one side connected to the current-carrying conductor. It is further preferred in this state involved in any circuit and therefore virtually electrically isolated.
  • the fuse is thus preferably used exclusively to avoid arcing after a triggering case of the pyrotechnic circuit breaker and accordingly the fuse has virtually no function up to such a trigger case.
  • the Fuse specially adapted to the expected residual energies and residual stresses that are to be reduced after a tripping case, adapt. Therefore, the pyrotechnic circuit breaker is typically designed for a current path or circuit having a predetermined rated current, wherein the fuse value or fuse threshold value of the fuse is smaller than the predetermined rated current.
  • a corresponding pyrotechnic circuit breaker is here, as already mentioned, preferably designed for a vehicle electrical system of a motor vehicle. More preferably, the pyrotechnic circuit breaker is designed for a supply voltage greater than 20 volts, typically 48 volts. In addition, an embodiment is preferred in which the pyrotechnic circuit breaker is designed for a supply voltage less than 500 V and in particular less than 100 volts.
  • the separator further preferably has a base body made of an insulating material.
  • This base body is then typically a type of supporting element for the fuse, which is integrated, for example, in the base body.
  • the base body is configured, for example, as a hollow body, in which the fuse is arranged, so that the fuse is virtually enveloped by the base body.
  • the separating body is formed of an insulating material and by a conductor track which forms the fuse and which is preferably positioned on the outside of the base body.
  • the fuse is in this case formed for example by a coating applied to the base body coating, so for example by a strip-shaped coating, which is in particular similar to a conductor track.
  • a corresponding conductor track is further preferably arranged in a recess or groove in the base body and in this case in particular at least partially sunk, but so that the separating body after a release of the pyrotechnic unit bridged in any case, the severed current-carrying conductor.
  • the separating body is produced by means of a MID process (MID: Molded Interconnect Devices) or by means of a 3D MID technology, wherein, for example, first a blank is produced as the base body from an insulating material by injection molding and subsequently with conductor tracks is provided, which are designed as a fuse.
  • MID process MID: Molded Interconnect Devices
  • 3D MID technology wherein, for example, first a blank is produced as the base body from an insulating material by injection molding and subsequently with conductor tracks is provided, which are designed as a fuse.
  • a corresponding base body which is made for example by injection molding of a plastic, a bottom with a cutting edge for cutting through the current-carrying conductor in the event of triggering, which is preferably uncoated at least in the region of the cutting edge.
  • the coating forming the fuse is preferably arranged or extends laterally on the base body.
  • the surface of such a cutting blade is functionalized by having conductive structures at least in one region.
  • Such an embodiment is advantageous, inter alia, because this surface is the first to come into contact with the current-carrying conductor in the event of tripping.
  • the conductor structures are further preferably arranged in a recess or groove in the cutting blade and in this case in particular at least partially sunk, however, so that the separator after each triggering the pyrotechnic unit bridges the severed current-carrying conductor.
  • the bridging is preferably not carried out over the shortest path over the cutting edge or the surface of the cutting edge, but rather the cutting edge preferably, for example, on two opposite sides, two on the cutting blade separate conductor structure ends, over a further course of this conductor structure which extends over the remainder of the separator or the surface of the remainder of the separator.
  • the pyrotechnic unit of the pyrotechnic circuit breaker is preferably kept simple and constructed according to a known principle.
  • the pyrotechnic unit expediently comprises a pyrotechnic propellant charge and an electrical detonator with a signal input, so that a triggering signal or ignition signal can be fed into the detonator via the signal input, which activates the detonator and thus triggers the ignition of the pyrotechnic propellant charge.
  • the ignited pyrotechnic propellant in turn accelerates the separating body, which is typically designed wedge-like or thorn-like and thus a kind of cutting edge, so the separating blade has, so that this is driven to the current-carrying sheet and subsequently cut through the current-carrying conductor.
  • the feeding of a trigger signal ultimately causes a galvanic separation of the connection elements and thus an interruption of the electrical connection between an input terminal and an output terminal.
  • the signal input of the igniter is signal technically connected to a signal generator, by which the triggering condition for the pyrotechnic circuit breaker is specified, ie when a predetermined condition, the Tripping case, a trigger signal generated and transmitted to the pyrotechnic switch.
  • a corresponding pyrotechnic circuit breaker is installed, for example, in a motor vehicle, for example, an airbag control unit in the motor vehicle serves as a signal generator, so that in the event of triggering of an airbag in the motor vehicle and the pyrotechnic circuit breaker is triggered, so the pyrotechnic propellant is ignited.
  • the triggering of the pyrotechnic circuit breaker then takes place, in the case of a traffic accident, the pyrotechnic circuit breaker is typically involved in such a way in the electrical system of the motor vehicle that by triggering electrical energy sources of the motor vehicle after a traffic accident quasi isolated and separated from the rest of the motor 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, so ignite, for example, leaking oil or gasoline.
  • FIG. 1 shows a side view of a pyrotechnic circuit breaker
  • FIG. 2 shows in a side view an alternative embodiment of the pyrotechnic circuit breaker with a current-carrying conductor and with a separating body as well
  • FIG 3 shows a side view of the current-carrying conductor and the separating body in a situation after a triggering case.
  • a pyrotechnic circuit breaker 2 described by way of example below is designed for use in a vehicle electrical system of a motor vehicle and is accordingly preferably used in a vehicle electrical system of a motor vehicle.
  • the pyrotechnic circuit breaker 2 has, as shown schematically in Fig. 1, a pyrotechnic unit 4 and a separator 6, which are housed in a housing 8.
  • the pyrotechnic unit 4 is grown according to a known principle and can be activated or triggered via a signal input 10 by means of an electrical signal.
  • the current-carrying conductor 16 is formed in the embodiment by a current-carrying sheet or stamped sheet metal and has two connecting arms 18 which protrude on opposite sides of the housing 8 of the pyrotechnic circuit breaker 2.
  • connection arms 18 which are part of the pyrotechnic circuit breaker 2, form in the installed state of the pyrotechnic circuit breaker 2, two connection elements, wherein one of the two connection elements is designed as an input terminal for a Stromzultechnisch and the other of the two connection elements as an output terminal for a Stromabloom protest.
  • the two connecting arms 18 and thus the two connecting elements are then mechanically separated from each other.
  • the separator 6 is configured in the embodiment such that it has a fuse 20 by which, after a triggering event, arcing at the point of separation of the severed current-carrying conductor 16 is prevented.
  • This fuse 20 is in the initial state of the pyrotechnic circuit breaker 2, ie before a triggering case, electrically isolated and therefore not connected to the current-carrying conductor 16. After a triggering case, however, the fuse 20 bridges the separation point of the severed current-carrying conductor 16, so that a residual voltage possibly present after a triggering event can be dissipated via the fuse 20. The removal of a corresponding residual voltage takes place without a relevant transfer of electrical energy between the connection arms 18, instead, the electrical energy is essentially converted into heat in the fuse 20, whereby the fuse 20 finally melts through.
  • the separating body 6 is formed by a base body 22 made of an insulating material, for example of a plastic, in which the fuse 20 is integrated.
  • the base body 22 is thus configured in this case as a kind of hollow body, in the interior of which expediently a classic fuse 20 is arranged.
  • the fuse 20, as indicated in Fig. 2 realized by a coating on the base body 22, so for example by a kind of conductor 24, which is for example sprayed or printed on the base body 22.
  • the conductor track 24 runs primarily along one side of the base body 22, whereas the underside 14 of the base body 22 in the region of the separating blade 12 and the opposite upper side 26 of the base body 22 are uncoated.
  • FIG 3 shows a situation after a triggering case of the pyrotechnic unit 4 and a melting of the fuse 20 forming conductor 24.
  • the conductor 24 bridges the separation point of the severed current-carrying conductor 16.
  • the cutting blade 12 is located in the separation point A and the conductor 24 extends into an edge region on the underside 14 of the base body 22, so that the conductor track 24 is positioned in this edge region between the base body 22 of the separating body 6 and the current-carrying conductor 16.

Abstract

The invention relates to a pyrotechnic circuit breaker (2), in particular for an on-board power supply system of a motor vehicle, having a housing (8), a pyrotechnic unit (4) and a separating body (6) for severing a current-carrying conductor (16) in the event of tripping, wherein the separating body (6) has a fuse (20, 24).

Description

Beschreibung  description
Pyrotechnischer Schutzschalter und Versorgungsnetz mit einem pyrotechnischen Schutzschalter  Pyrotechnic circuit breaker and supply network with a pyrotechnic circuit breaker
Die Erfindung betrifft einen pyrotechnischen Schutzschalter, insbesondere für ein Kraftfahrzeug, aufweisend ein Gehäuse, eine pyrotechnische Einheit und einen Trennkörper zur Durchtrennung eines stromführenden Leiters im Auslösefall. The invention relates to a pyrotechnic circuit breaker, in particular for a motor vehicle, comprising a housing, a pyrotechnic unit and a separating body for severing a current-carrying conductor in the event of tripping.
Bei einem pyrotechnischen Schutzschalter, 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 pyrotechnischen Schutzschalter, auch 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 In a pyrotechnic circuit breaker, also called pyrotechnic fuse element, it is not a protection device for securing a current path against overcurrents, as is the case for example with fuses. Instead, the pyrotechnic circuit breaker, also referred to as a pyrotechnic safety switch, pyrotechnic isolator or short pyrotechnic switch, is a type of emergency stop switch of stop category 0 (EN ISO 13850: 2008 clause 4.1.4 and EN 60204-1: 2006
Pkt. 9.2.2), welcher sich manuell auslösen lässt und/oder unter vorgegebenen Bedingungen automatisch angesteuert und ausgelöst wird. Item 9.2.2), which can be triggered manually and / or automatically activated and triggered under specified conditions.
Hierbei ist der pyrotechnische Schutzschalter 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 unter- brachen. Aufgrund dieses Funktionsprinzips wird ein solcher pyrotechnischer Schutzschalter mitunter auch als Batterietrennschalter bezeichnet. Here, the pyrotechnic circuit breaker is constructed according to a principle known per se. It comprises a pyrotechnic propellant which is typically ignited by an electrical ignition signal, in particular a sensor signal of a connected sensor, and as a result accelerates a separating body, usually a wedge or a bolt, so that it mechanically cuts through an electrical conductor, usually a conductor strip. As a result, the given by the electrical conductor electrical connection, for example, between an electrical energy source, for example, a battery in a motor vehicle, and a connected current path with various consumers under different. broke. Due to this principle of operation, such a pyrotechnic circuit breaker is sometimes referred to as a battery disconnector.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine vorteilhafte Ausgestaltung für einen pyrotechnischen Schutzschalter anzugeben und ein Versorgungsnetz mit einem entsprechenden pyrotechnischen Schutzschalter. Proceeding from this, the present invention seeks to provide an advantageous embodiment of a pyrotechnic circuit breaker and a supply network with a corresponding pyrotechnic circuit breaker.
Diese Aufgabe wird erfindungsgemäß gelöst durch einen pyrotechnischen Schutzschalter mit den Merkmalen des Anspruchs 1 sowie durch ein Versorgungsnetz mit den Merkmalen des Anspruchs 13. Bevorzugte Weiterbildungen sind in den rückbezogenen Ansprüchen enthalten. Die im Hinblick auf den pyrotechnischen Schutzschalter angeführten Vorteile und bevorzugten Ausgestaltungen sind sinngemäß auch auf das Versorgungsnetz übertragbar und umgekehrt. This object is achieved by a pyrotechnic circuit breaker with the features of claim 1 and by a supply network with the features of claim 13. Preferred developments are contained in the dependent claims. The advantages and preferred embodiments cited with regard to the pyrotechnic circuit breaker are analogously also applicable to the supply network and vice versa.
Ein entsprechender pyrotechnischer Schutzschalter ist dabei insbesondere für den Einsatz in einem Bordnetz eines Kraftfahrzeuges ausgebildet und wird dementsprechend bevorzugt in einem Bordnetz eines Kraftfahrzeuges eingesetzt. Hierbei weist der pyrotechnische Schutzschalter eine pyrotechnische Einheit sowie einen Trennkörper auf, die typischerweise in einem Gehäuse untergebracht sind. Dabei ist die pyrotechnische Einheit zweckdienlicherweise nach an sich bekanntem Prinzip aufgebaut und dient dementsprechend dazu, den Trennkörper im Auslösefall des pyrotechnischen Schutzschalters zu beschleunigen, sodass dieser einen stromführenden Leiter des pyrotechnischen Schutzschalters durchtrennt. A corresponding pyrotechnic circuit breaker is designed in particular for use in a vehicle electrical system of a motor vehicle and is therefore preferably used in a vehicle electrical system of a motor vehicle. Here, the pyrotechnic circuit breaker on a pyrotechnic unit and a separator, which are typically housed in a housing. The pyrotechnic unit is expediently constructed according to a principle known per se and accordingly serves to accelerate the separator in the event of triggering the pyrotechnic circuit breaker, so that this cuts through a current-carrying conductor of the pyrotechnic circuit breaker.
Jener Leiter wiederum ist typischerweise durch ein Stromführungsblech, beispielsweise ein Stanzblech, ausgebildet und weist üblicherweise zumindest zwei Anschlusselemente oder Anschlussarme auf, wobei eines der zumindest zwei Anschlusselemente typischerweise zumindest im verbauten Zustand des pyrotechnischen Schutzschalters als Eingangsanschluss für eine Stromzuflussleitung und das andere der zumindest zwei Anschlusselemente als Ausgangsanschluss für eine Stromabführleitung ausgebildet ist. Jene beiden Anschlusselemente oder Anschlussarme werden dann im Auslösefall durch die Durchtrennung des stromführenden Leiter mechanisch voneinander getrennt. Darüber hinaus weist der Trennkörper des pyrotechnischen Schutzschalters eine Schmelzsicherung auf, wobei die Schmelzsicherung in erster Linie zur Verhinderung von Lichtbögen dient, die sich ansonsten nach einem Auslösefall ausbilden und den durchtrennten stromführenden Leiter an der Trennstelle überbrücken könnten. Jene Schmelzsicherung dient dementsprechend insbesondere dazu, nach einem Auslösefall eine gegebenenfalls über der Trennstelle des durchtrennten stromführenden Leiters anliegende Restspannung abzubauen und zwar bevorzugt derart, dass keine relevante elektrische Energie von einem Anschlusselement zum anderen Anschlusselement übertragen wird. Stattdessen wird die gegebenenfalls vorhandene elektrische Energie in der Schmelzsicherung in Wärme umgewandelt, durch die die Schmelzsicherung dann anschmilzt oder durchschmilzt und dementsprechend auslöst. The conductor in turn is typically formed by a current-carrying metal sheet, for example a stamped sheet metal, and usually has at least two connecting elements or connecting arms, wherein one of the at least two connecting elements typically at least in the installed state of the pyrotechnic circuit breaker as an input terminal for a Stromzuflussleitung and the other of the at least two connection elements is formed as an output terminal for a Stromabführleitung. Those two connection elements or connecting arms are then mechanically separated from each other in the case of tripping by the passage of the current-carrying conductor. In addition, the separator of the pyrotechnic circuit breaker on a fuse, the fuse is primarily used to prevent arcing, which otherwise form after a triggering case and could bridge the severed current-carrying conductor at the separation point. Accordingly, the fuse serves, in particular, to dissipate a residual voltage possibly present across the point of separation of the severed current-carrying conductor after a triggering event, and preferably such that no relevant electrical energy is transferred from one connecting element to the other connecting element. Instead, the electrical energy that may be present in the fuse is converted into heat, through which the fuse then melts or melts and triggers accordingly.
Zweckdienlich ist hierbei insbesondere eine Ausgestaltung des pyrotechnischen Schutzschalters, bei der die Schmelzsicherung zumindest bis zu ihrer Auslösung, also bis zum Durchschmelzen der Schmelzsicherung, den stromführenden Leiter nach dessen Durchtrennung im Auslösefall des pyrotechnischen Schutzschalters überbrückt, bei der also insbesondere der Trennkörper den durchtrennten stromführenden Leiter überbrückt. Conveniently this is in particular an embodiment of the pyrotechnic circuit breaker, in which the fuse at least until its release, ie until melting the fuse bridges the current-carrying conductor after its severance in the event of triggering the pyrotechnic circuit breaker, ie in particular the separator the severed current-carrying conductor bridged.
Im Ausgangszustand des pyrotechnischen Schutzschalters dagegen, also bis zu einer Ansteuerung oder Zündung der pyrotechnischen Einheit und somit bis hin zum Auslösefall des pyrotechnischen Schutzschalters, ist die Schmelzsicherung bevorzugt nicht mit dem stromführenden Leiter verbunden oder zumindest nur einseitig mit dem stromführenden Leiter verbunden. Sie ist in diesem Zustand weiter bevorzugt in keinen Stromkreis eingebunden und dementsprechend quasi elektrisch isoliert. In the initial state of the pyrotechnic circuit breaker, however, ie up to a control or ignition of the pyrotechnic unit and thus up to the triggering case of the pyrotechnic circuit breaker, the fuse is preferably not connected to the current-carrying conductor or at least only one side connected to the current-carrying conductor. It is further preferred in this state involved in any circuit and therefore virtually electrically isolated.
Die Schmelzsicherung dient also bevorzugt ausschließlich zur Vermeidung von Lichtbögen nach einem Auslösefall des pyrotechnischen Schutzschalters und dementsprechend hat die Schmelzsicherung dann quasi bis zu einem solchen Auslösefall keinerlei Funktion. Hierdurch ist es unter anderem möglich, die Schmelzsicherung speziell an die zu erwartenden Restenergien und Restspannungen, die nach einem Auslösefall abzubauen sind, anzupassen. Daher ist der pyrotechnische Schutzschalter typischerweise für einen Strompfad oder Stromkreis mit einem vorgegebenen Nennstrom ausgebildet, wobei der Sicherungswert oder Sicherungsschwellwert der Schmelzsicherung kleiner als der vorgegebene Nennstrom ist. The fuse is thus preferably used exclusively to avoid arcing after a triggering case of the pyrotechnic circuit breaker and accordingly the fuse has virtually no function up to such a trigger case. This makes it possible, inter alia, the Fuse specially adapted to the expected residual energies and residual stresses that are to be reduced after a tripping case, adapt. Therefore, the pyrotechnic circuit breaker is typically designed for a current path or circuit having a predetermined rated current, wherein the fuse value or fuse threshold value of the fuse is smaller than the predetermined rated current.
Ein entsprechender pyrotechnischer Schutzschalter ist hierbei, wie bereits zuvor erwähnt, bevorzugt für ein Bordnetz eines Kraftfahrzeuges ausgelegt. Weiter bevorzugt ist der pyrotechnische Schutzschalter dabei für eine Versorgungsspannung größer 20 Volt, typischerweise 48 Volt, ausgelegt. Zudem ist eine Ausführung bevorzugt, bei der der pyrotechnische Schutzschalter für eine Versorgungsspannung kleiner 500 V und insbesondere kleiner 100 Volt ausgelegt ist. A corresponding pyrotechnic circuit breaker is here, as already mentioned, preferably designed for a vehicle electrical system of a motor vehicle. More preferably, the pyrotechnic circuit breaker is designed for a supply voltage greater than 20 volts, typically 48 volts. In addition, an embodiment is preferred in which the pyrotechnic circuit breaker is designed for a supply voltage less than 500 V and in particular less than 100 volts.
Unter anderem auch um den technischen und finanziellen Aufwand für die Fertigung entsprechender pyrotechnischer Schutzschalter verhältnismäßig gering zu halten, weist der Trennkörper weiter bevorzugt einen Basiskörper aus einem Isoliermaterial auf. Dieser Basiskörper ist dann typischerweise eine Art tragendes Element für die Schmelzsicherung, die beispielsweise in den Basiskörper integriert ist. Hierbei ist der Basiskörper beispielsweise als Hohlkörper ausgestaltet, in dem die Schmelzsicherung angeordnet ist, sodass die Schmelzsicherung vom Basiskörper quasi umhüllt wird. Among other things, to keep the technical and financial costs for the production of corresponding pyrotechnic circuit breaker relatively low, the separator further preferably has a base body made of an insulating material. This base body is then typically a type of supporting element for the fuse, which is integrated, for example, in the base body. Here, the base body is configured, for example, as a hollow body, in which the fuse is arranged, so that the fuse is virtually enveloped by the base body.
Einer weiteren Ausgestaltungsvariante entsprechend ist der Trennkörper aus einem Isoliermaterial ausgebildet sowie durch eine Leiterbahn, die die Schmelzsicherung ausbildet und die bevorzugt außenseitig am Basiskörper positioniert ist. Die Schmelzsicherung ist hierbei beispielsweise durch eine auf den Basiskörper aufgebrachte Beschichtung ausgebildet, also beispielsweise durch eine streifenförmige Beschichtung, die insbesondere ähnlich einer Leiterbahn ausgebildet ist. Eine entsprechende Leiterbahn ist dabei weiter bevorzugt in einer Vertiefung oder Nut im Basiskörper angeordnet und hierbei insbesondere zumindest teilweise versenkt angeordnet, jedoch so, dass der Trennkörper nach einer Auslösung der der pyrotechnischen Einheit in jedem Fall den durchtrennten stromführenden Leiter überbrückt. According to a further embodiment variant of the separating body is formed of an insulating material and by a conductor track which forms the fuse and which is preferably positioned on the outside of the base body. The fuse is in this case formed for example by a coating applied to the base body coating, so for example by a strip-shaped coating, which is in particular similar to a conductor track. A corresponding conductor track is further preferably arranged in a recess or groove in the base body and in this case in particular at least partially sunk, but so that the separating body after a release of the pyrotechnic unit bridged in any case, the severed current-carrying conductor.
Zudem ist eine Ausführung vorteilhaft, bei der der Trennkörper mittels eines MID- Verfahrens (MID: Molded Interconnect Devices) oder mittels einer 3D-MID- Technologie hergestellt ist, wobei beispielsweise zunächst ein Rohling als Basiskörper aus einem Isoliermaterial durch Spritzguss hergestellt und anschließend mit Leiterbahnen versehen wird, die als Schmelzsicherung ausgebildet sind. In addition, an embodiment is advantageous in which the separating body is produced by means of a MID process (MID: Molded Interconnect Devices) or by means of a 3D MID technology, wherein, for example, first a blank is produced as the base body from an insulating material by injection molding and subsequently with conductor tracks is provided, which are designed as a fuse.
In vorteilhafter Weiterbildung weist ein entsprechender Basiskörper, der beispielsweise durch Spritzguss aus einem Kunststoff gefertigt ist, eine Unterseite mit einer Trennschneide zur Durchtrennung des stromführenden Leiters im Auslösefall auf, welche bevorzugt zumindest im Bereich der Trennschneide unbeschichtet ist. Das heißt, dass die die Schmelzsicherung ausbildende Beschichtung bevorzugt seitlich am Basiskörper angeordnet ist oder verläuft. In an advantageous embodiment, a corresponding base body, which is made for example by injection molding of a plastic, a bottom with a cutting edge for cutting through the current-carrying conductor in the event of triggering, which is preferably uncoated at least in the region of the cutting edge. This means that the coating forming the fuse is preferably arranged or extends laterally on the base body.
Alternativ ist die Oberfläche einer solchen Trennschneide funktionalisiert, indem diese zumindest in einem Bereich Leiterstrukturen aufweist. Eine solche Ausgestaltung ist unter anderem deswegen vorteilhaft, da diese Oberfläche im Auslösefall mit dem stromführenden Leiter als erstes in Berührung kommt. Die Leiterstrukturen sind dabei weiter bevorzugt in einer Vertiefung oder Nut in der Trennschneide angeordnet und hierbei insbesondere zumindest teilweise versenkt angeordnet, jedoch so, dass der Trennkörper nach einer Auslösung der der pyrotechnischen Einheit in jedem Fall den durchtrennten stromführenden Leiter überbrückt. Die Überbrückung erfolgt hierbei jedoch weiter bevorzugt nicht über die kürzeste Wegstrecke über die Trennschneide oder die Oberfläche der Trennschneide, vielmehr weist die Trennschneide bevorzugt, zum Beispiel auf zwei gegenüberliegenden Seiten, zwei auf der Trennschneide voneinander getrennte Leiterstrukturenden auf, die über einen weitergehenden Verlauf dieser Leiterstruktur, der sich über den übrigen Trennkörper oder die Oberfläche des übrigen Trennkörpers hinweg erstreckt, miteinander verbunden sind. 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, also die Trennschneide, aufweist, so dass dieser auf das Stromführungsblech zugetrieben wird und in der Folge den stromführenden Leiter durchtrennt. Somit bewirkt die Einspeisung eines Auslösesignals letzten Endes eine galvanische Trennung der Anschlusselemente und damit eine Unterbrechung der elektrischen Verbindung zwischen einem Eingangsan- schluss und einem Ausgangsanschluss. Alternatively, the surface of such a cutting blade is functionalized by having conductive structures at least in one region. Such an embodiment is advantageous, inter alia, because this surface is the first to come into contact with the current-carrying conductor in the event of tripping. The conductor structures are further preferably arranged in a recess or groove in the cutting blade and in this case in particular at least partially sunk, however, so that the separator after each triggering the pyrotechnic unit bridges the severed current-carrying conductor. However, the bridging is preferably not carried out over the shortest path over the cutting edge or the surface of the cutting edge, but rather the cutting edge preferably, for example, on two opposite sides, two on the cutting blade separate conductor structure ends, over a further course of this conductor structure which extends over the remainder of the separator or the surface of the remainder of the separator. Next, the pyrotechnic unit of the pyrotechnic circuit breaker is preferably kept simple and constructed according to a known principle. The pyrotechnic unit expediently comprises a pyrotechnic propellant charge and an electrical detonator with a signal input, so that a triggering signal or ignition signal can be fed into the detonator via the signal input, which activates the detonator and thus triggers the ignition of the pyrotechnic propellant charge. The ignited pyrotechnic propellant in turn accelerates the separating body, which is typically designed wedge-like or thorn-like and thus a kind of cutting edge, so the separating blade has, so that this is driven to the current-carrying sheet and subsequently cut through the current-carrying conductor. Thus, the feeding of a trigger signal ultimately causes a galvanic separation of the connection elements and thus an interruption of the electrical connection between an input terminal and an output terminal.
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 pyrotechnic circuit breaker, ie in the context of integration into a current path or circuit, the signal input of the igniter is signal technically connected to a signal generator, by which the triggering condition for the pyrotechnic circuit breaker is specified, ie when a predetermined condition, the Tripping case, a trigger signal generated and transmitted to the pyrotechnic switch. Now, if a corresponding pyrotechnic circuit breaker is installed, for example, in a motor vehicle, for example, an airbag control unit in the motor vehicle serves as a signal generator, so that in the event of triggering of an airbag in the motor vehicle and the pyrotechnic circuit breaker is triggered, so the pyrotechnic propellant is ignited. The triggering of the pyrotechnic circuit breaker then takes place, in the case of a traffic accident, the pyrotechnic circuit breaker is typically involved in such a way in the electrical system of the motor vehicle that by triggering electrical energy sources of the motor vehicle after a traffic accident quasi isolated and separated from the rest of the motor 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, so ignite, for example, leaking oil or gasoline.
Ausführungsbeispiele der Erfindung werden nachfolgend anhand einer schematischen Zeichnung näher erläutert. Darin zeigen: Embodiments of the invention will be explained in more detail with reference to a schematic drawing. Show:
FIG 1 in einer Seitenansicht einen pyrotechnischen Schutzschalter, 1 shows a side view of a pyrotechnic circuit breaker,
FIG 2 in einer Seitenansicht eine alternative Ausführung des pyrotechnischen Schutzschalter mit einem stromführenden Leiter und mit einem Trennkörper sowie 2 shows in a side view an alternative embodiment of the pyrotechnic circuit breaker with a current-carrying conductor and with a separating body as well
FIG 3 in einer Seitenansicht den stromführenden Leiter und den Trennkörper in einer Situation nach einem Auslösefall. 3 shows a side view of the current-carrying conductor and the separating body in a situation after a triggering case.
Einander entsprechende Teile sind in allen Figuren jeweils mit den gleichen Bezugszeichen versehen. Corresponding parts are provided in all figures with the same reference numerals.
Ein nachfolgend exemplarisch beschriebener pyrotechnischer Schutzschalter 2 ist für den Einsatz in einem Bordnetz eines Kraftfahrzeuges ausgelegt und wird dementsprechend bevorzugt in einem Bordnetz eines Kraftfahrzeuges eingesetzt. Jener pyrotechnische Schutzschalter 2 weist dabei, wie in Fig. 1 schematisch dargestellt, eine pyrotechnische Einheit 4 sowie einen Trennkörper 6 auf, welche in einem Gehäuse 8 untergebracht sind. Die pyrotechnische Einheit 4 ist dabei nach an sich bekanntem Prinzip angebaut und über einen Signaleingang 10 mittels eines elektrischen Signals aktivierbar oder auslösbar. A pyrotechnic circuit breaker 2 described by way of example below is designed for use in a vehicle electrical system of a motor vehicle and is accordingly preferably used in a vehicle electrical system of a motor vehicle. The pyrotechnic circuit breaker 2 has, as shown schematically in Fig. 1, a pyrotechnic unit 4 and a separator 6, which are housed in a housing 8. The pyrotechnic unit 4 is grown according to a known principle and can be activated or triggered via a signal input 10 by means of an electrical signal.
Geht dann über den Signaleingang 10 ein entsprechendes elektrisches Signal ein, so wird die pyrotechnische Einheit 4 aktiviert und der Auslösefall liegt vor. Daraufhin wird durch die pyrotechnische Einheit 4 der Trennkörper 6 beschleunigt und dieser durchtrennt dann mit einer Trennschneide 12 auf der Unterseite 14 des Trennkörpers 6 einen stromführenden Leiter 16, also einen elektrischen Leiter, der für eine Stromführung vorgesehen ist. Der stromführende Leiter 16 ist im Ausführungsbeispiel durch ein Stromführungsblech oder Stanzblech ausgebildet und weist zwei Anschlussarme 18 auf, die an gegenüberliegenden Seiten aus dem Gehäuse 8 des pyrotechnischen Schutzschalters 2 herausragen. Diese zwei Anschlussarme 18, die Teil des pyrotechnischen Schutzschalters 2 sind, bilden im verbauten Zustand des pyrotechnischen Schutzschalters 2 zwei Anschlusselemente aus, wobei eines der zwei Anschlusselemente als Eingangsanschluss für eine Stromzuflussleitung und das andere der zwei Anschlusselemente als Ausgangsanschluss für eine Stromabführleitung ausgebildet ist. Im Auslösefall werden dann die beiden Anschlussarme 18 und somit die beiden Anschlusselemente mechanisch voneinander getrennt. Then goes via the signal input 10 a corresponding electrical signal, so the pyrotechnic unit 4 is activated and the triggering case is present. Then, the separator body 6 is accelerated by the pyrotechnic unit 4 and this then cuts with a cutting edge 12 on the bottom 14 of the separator 6, a current-carrying conductor 16, that is, an electrical conductor, which is provided for a current guide. The current-carrying conductor 16 is formed in the embodiment by a current-carrying sheet or stamped sheet metal and has two connecting arms 18 which protrude on opposite sides of the housing 8 of the pyrotechnic circuit breaker 2. These two connection arms 18, which are part of the pyrotechnic circuit breaker 2, form in the installed state of the pyrotechnic circuit breaker 2, two connection elements, wherein one of the two connection elements is designed as an input terminal for a Stromzuflussleitung and the other of the two connection elements as an output terminal for a Stromabführleitung. When triggered, the two connecting arms 18 and thus the two connecting elements are then mechanically separated from each other.
Weiter ist der Trennkörper 6 im Ausführungsbeispiel derart ausgestaltet, dass dieser eine Schmelzsicherung 20 aufweist durch welche nach einem Auslösefall eine Lichtbogenbildung an der Trennstelle des durchtrennten stromführenden Leiters 16 unterbunden wird. Diese Schmelzsicherung 20 ist dabei im Ausgangszustand des pyrotechnischen Schutzschalters 2, also vor einem Auslösefall, elektrisch isoliert und dementsprechend nicht mit dem stromführenden Leiter 16 verbunden. Nach einem Auslösefall dagegen überbrückt die Schmelzsicherung 20 die Trennstelle des durchtrennten stromführenden Leiters 16, sodass eine nach einem Auslösefall gegebenenfalls vorliegende Restspannung über die Schmelzsicherung 20 abgebaut werden kann. Der Abbau einer entsprechenden Restspannung erfolgt dabei ohne eine relevante Übertragung von elektrischer Energie zwischen den Anschlussarmen 18, stattdessen wird die elektrische Energie im Wesentlichen in der Schmelzsicherung 20 in Wärme umgewandelt, wodurch die Schmelzsicherung 20 schließlich durchschmilzt. Further, the separator 6 is configured in the embodiment such that it has a fuse 20 by which, after a triggering event, arcing at the point of separation of the severed current-carrying conductor 16 is prevented. This fuse 20 is in the initial state of the pyrotechnic circuit breaker 2, ie before a triggering case, electrically isolated and therefore not connected to the current-carrying conductor 16. After a triggering case, however, the fuse 20 bridges the separation point of the severed current-carrying conductor 16, so that a residual voltage possibly present after a triggering event can be dissipated via the fuse 20. The removal of a corresponding residual voltage takes place without a relevant transfer of electrical energy between the connection arms 18, instead, the electrical energy is essentially converted into heat in the fuse 20, whereby the fuse 20 finally melts through.
Entsprechend der in Fig. 1 angedeuteten Ausführungsvariante wird der Trennkörper 6 durch einen Basiskörper 22 aus einem Isoliermaterial, beispielsweise aus einem Kunststoff ausgebildet, in den die Schmelzsicherung 20 integriert ist. Der Basiskörper 22 ist in diesem Fall also als eine Art Hohlkörper ausgestaltet, in dessen Inneren zweckdienlicherweise eine klassische Schmelzsicherung 20 angeordnet ist. Alternativ ist die Schmelzsicherung 20, so wie in Fig. 2 angedeutet, durch eine Beschichtung am Basiskörper 22 realisiert, also beispielsweise durch eine Art Leiterbahn 24, welche auf dem Basiskörper 22 beispielsweise aufgespritzt oder auf- gedruckt ist. Die Leiterbahn 24 verläuft dabei in erster Linie an einer Seite des Basiskörpers 22 entlang, wohingegen die Unterseite 14 des Basiskörpers 22 im Bereich der Trennschneide 12 sowie die gegenüberliegende Oberseite 26 des Basiskörpers 22 unbeschichtet sind. Fig. 3 zeigt hierbei eine Situation nach einem Auslösefall der pyrotechnische Einheit 4 und von einem Durchschmelzen der die Schmelzsicherung 20 ausbildenden Leiterbahn 24. In diesem Zustand überbrückt die Leiterbahn 24 die Trennstelle des durchtrennten stromführenden Leiters 16. Die Trennschneide 12 ist liegt dabei in der Trennstelle ein und die Leiterbahn 24 erstreckt sich bis in einen Randbe- reich auf der Unterseite 14 des Basiskörpers 22, so dass die Leiterbahn 24 in diesem Randbereich zwischen dem Basiskörper 22 des Trennkörpers 6 und dem stromführenden Leiter 16 positioniert ist. According to the embodiment variant indicated in FIG. 1, the separating body 6 is formed by a base body 22 made of an insulating material, for example of a plastic, in which the fuse 20 is integrated. The base body 22 is thus configured in this case as a kind of hollow body, in the interior of which expediently a classic fuse 20 is arranged. Alternatively, the fuse 20, as indicated in Fig. 2, realized by a coating on the base body 22, so for example by a kind of conductor 24, which is for example sprayed or printed on the base body 22. In this case, the conductor track 24 runs primarily along one side of the base body 22, whereas the underside 14 of the base body 22 in the region of the separating blade 12 and the opposite upper side 26 of the base body 22 are uncoated. Fig. 3 shows a situation after a triggering case of the pyrotechnic unit 4 and a melting of the fuse 20 forming conductor 24. In this state, the conductor 24 bridges the separation point of the severed current-carrying conductor 16. The cutting blade 12 is located in the separation point A and the conductor 24 extends into an edge region on the underside 14 of the base body 22, so that the conductor track 24 is positioned in this edge region between the base body 22 of the separating body 6 and the current-carrying conductor 16.
Die Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel be- schränkt. Vielmehr können auch andere Varianten der Erfindung von dem Fachmann hieraus abgeleitet werden, ohne den Gegenstand der Erfindung zu verlassen. Insbesondere sind ferner alle im Zusammenhang mit dem Ausführungsbeispiel beschriebenen Einzelmerkmale auch auf andere Weise miteinander kombinierbar, ohne den Gegenstand der Erfindung zu verlassen. The invention is not limited to the embodiment described above. Rather, other variants of the invention can be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, all the individual features described in connection with the exemplary embodiment can also be combined with each other in other ways, without departing from the subject matter of the invention.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
2 pyrotechnischer Schutzschalter2 pyrotechnic circuit breaker
4 pyrotechnischer Einheit4 pyrotechnic unit
6 Trenn körper 6 separating body
8 Gehäuse  8 housing
10 Signaleingang  10 signal input
12 Trennschneide  12 cutting edge
14 Unterseite  14 bottom
16 stromführender Leiter  16 live conductor
18 Anschlussarm  18 connecting arm
20 Schmelzsicherung  20 fuse
22 Basiskörper  22 base bodies
24 Leiterbahn  24 trace
26 Oberseite  26 top

Claims

Ansprüche claims
1 . Pyrotechnischer Schutzschalter (2), insbesondere für ein Bordnetz eines Kraftfahrzeugs, aufweisend ein Gehäuse (8), eine pyrotechnische Einheit (4) und einen Trennkörper (6) zur Durchtrennung eines stromführenden Leiters (16) im Auslösefall, 1 . Pyrotechnic circuit breaker (2), in particular for a vehicle electrical system of a motor vehicle, comprising a housing (8), a pyrotechnic unit (4) and a separating body (6) for cutting through a live conductor (16) in the event of triggering,
dadurch gekennzeichet,  characterized
dass der Trennkörper (6) eine Schmelzsicherung (20,24) aufweist.  the separating body (6) has a fuse (20, 24).
2. Pyrotechnischer Schutzschalter (2) nach Anspruch 1 , 2. Pyrotechnic circuit breaker (2) according to claim 1,
dadurch gekennzeichet,  characterized
dass die Schmelzsicherung (20,24) den stromführenden Leiter (16) nach dessen Durchtrennung durch den Trennkörper (6) überbrückt.  the fuse (20, 24) bridges the current-carrying conductor (16) after it has been severed by the separator (6).
3. Pyrotechnischer Schutzschalter (2) nach Anspruch 1 oder 2, 3. Pyrotechnic circuit breaker (2) according to claim 1 or 2,
dadurch gekennzeichet,  characterized
dass die Schmelzsicherung (20,24) bis zur Durchtrennung des stromführenden Leiters (16) im Auslösefall nicht mit dem stromführenden Leiter (16) verbunden ist.  that the fuse (20,24) is not connected to the current-carrying conductor (16) until the current-carrying conductor (16) is cut through in the event of tripping.
4. Pyrotechnischer Schutzschalter (2) nach Anspruch 1 bis 3, 4. pyrotechnic circuit breaker (2) according to claim 1 to 3,
dadurch gekennzeichet,  characterized
dass dieser für einen Strompfad mit vorgegebenem Nennstrom ausgebildet ist, wobei der Sicherungsschwellwert der Schmelzsicherung (20,24) kleiner als der vorgegebene Nennstrom ist.  that this is designed for a current path with a predetermined rated current, wherein the fuse threshold value of the fuse (20,24) is smaller than the predetermined rated current.
5. Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 1 bis 4, 5. Pyrotechnic circuit breaker (2) according to one of claims 1 to 4,
dadurch gekennzeichet,  characterized
dass der Trennkörper (6) durch einen Basiskörper (22) aus einem Isoliermaterial ausgebildet ist, in den die Schmelzsicherung (20) integriert ist, wobei die Schmelzsicherung (20) im Inneren des Basiskörpers (22) angeordnet ist. in that the separating body (6) is formed by a base body (22) made of an insulating material into which the fuse (20) is integrated, the fuse (20) being arranged in the interior of the base body (22).
6. Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 1 bis 4, 6. Pyrotechnic circuit breaker (2) according to one of claims 1 to 4,
dadurch gekennzeichet,  characterized
dass der Trennkörper (6) durch einen Basiskörper (22) aus einem Isoliermaterial ausgebildet ist und dass die Schmelzsicherung (20) durch eine Leiterbahn (24) ausgebildet ist.  in that the separating body (6) is formed by a base body (22) made of an insulating material and in that the fuse (20) is formed by a conductor track (24).
7. Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 1 bis 6, 7. Pyrotechnic circuit breaker (2) according to one of claims 1 to 6,
dadurch gekennzeichet,  characterized
dass der Trennkörper (6) durch einen Basiskörper (22) aus einem Isoliermaterial ausgebildet ist und dass die Schmelzsicherung (20) durch eine auf den Basiskörper (22) aufgebrachte Beschichtung (24) ausgebildet ist.  in that the separating body (6) is formed by a base body (22) made of an insulating material and in that the safety fuse (20) is formed by a coating (24) applied to the base body (22).
Pyrotechnischer Schutzschalter (2) nach Anspruch 7, Pyrotechnic circuit breaker (2) according to claim 7,
dadurch gekennzeichet,  characterized
dass die Schmelzsicherung (20) durch eine streifenförmige Beschichtung (24) ausgebildet ist.  the fuse (20) is formed by a strip-shaped coating (24).
Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 6 bis 8, Pyrotechnic circuit breaker (2) according to one of claims 6 to 8,
dadurch gekennzeichnet,  characterized,
dass der Trennkörper (6) mittels eines MID-Verfahrens hergestellt ist.  that the separating body (6) is produced by means of an MID process.
10. Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 6 bis 9, 10. Pyrotechnic circuit breaker (2) according to one of claims 6 to 9,
dadurch gekennzeichnet,  characterized,
dass die Schmelzsicherung (20) zumindest teilweise oder abschnittsweise in einer Vertiefung, insbesondere einer Nut, im Basiskörper (22) einliegt.  the fuse (20) rests at least partially or in sections in a recess, in particular a groove, in the base body (22).
1 1 . Pyrotechnischer Schutzschalter (2) nach Anspruch 7 oder 8, 1 1. Pyrotechnic circuit breaker (2) according to claim 7 or 8,
dadurch gekennzeichet,  characterized
dass der Basiskörper (22) eine Unterseite (14) mit einer Trennschneide (12) aufweist und dass die Unterseite (14) im Bereich der Trennschneide (12) unbeschichtet ist.  in that the base body (22) has a lower side (14) with a separating blade (12) and that the underside (14) is uncoated in the region of the separating blade (12).
12. Pyrotechnischer Schutzschalter (2) nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, 12. Pyrotechnic circuit breaker (2) according to one of claims 6 to 10, characterized,
dass der Basiskörper (22) eine Unterseite (14) mit einer Trennschneide (12) aufweist, wobei an der Trennschneide (12) eine Vertiefung, insbesondere eine Nut, ausgebildet ist und wobei die Schmelzsicherung (20) zumindest teilweise oder abschnittsweise in dieser Vertiefung einliegt.  in that the base body (22) has a lower side (14) with a separating blade (12), wherein a depression, in particular a groove, is formed on the separating blade (12) and wherein the fuse (20) rests in this depression at least partially or in sections ,
13. Versorgungsnetz, insbesondere Kraftfahrzeug-Bordnetz aufweisend einen pyrotechnischer Schutzschalter (2) nach einem der vorherigen Ansprüche, dadurch gekennzeichet, 13. supply network, in particular motor vehicle electrical system comprising a pyrotechnic circuit breaker (2) according to one of the preceding claims, characterized gekennzeichet
dass dieses für eine Versorgungsspannung größer 20 V eingerichtet ist.  that this is set up for a supply voltage greater than 20 V.
14. Versorgungsnetz nach Anspruch 10, 14. Supply network according to claim 10,
dadurch gekennzeichet,  characterized
dass dieses für eine Versorgungsspannung kleiner 100 V eingerichtet ist.  that this is set up for a supply voltage less than 100V.
EP18718831.3A 2017-05-08 2018-04-20 Pyrotechnic circuit breaker and supply system having a pyrotechnic circuit breaker Active EP3622548B1 (en)

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EP3622548B1 (en) 2020-08-12
WO2018206271A1 (en) 2018-11-15

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