EP3618089B1 - Sectionneur de courant pyrotechnique - Google Patents

Sectionneur de courant pyrotechnique Download PDF

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Publication number
EP3618089B1
EP3618089B1 EP19194918.9A EP19194918A EP3618089B1 EP 3618089 B1 EP3618089 B1 EP 3618089B1 EP 19194918 A EP19194918 A EP 19194918A EP 3618089 B1 EP3618089 B1 EP 3618089B1
Authority
EP
European Patent Office
Prior art keywords
signal line
conductor
piston
housing
pyrotechnic current
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.)
Active
Application number
EP19194918.9A
Other languages
German (de)
English (en)
Other versions
EP3618089A3 (fr
EP3618089A2 (fr
Inventor
Karoline Steinschütz
Markus Marker
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.)
Hirtenberger Automotive Safety GmbH
Original Assignee
Hirtenberger Automotive Safety 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.)
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Publication date
Application filed by Hirtenberger Automotive Safety GmbH filed Critical Hirtenberger Automotive Safety GmbH
Publication of EP3618089A2 publication Critical patent/EP3618089A2/fr
Publication of EP3618089A3 publication Critical patent/EP3618089A3/fr
Application granted granted Critical
Publication of EP3618089B1 publication Critical patent/EP3618089B1/fr
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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
    • 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
    • H01H9/0066—Auxiliary contact devices
    • 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 present invention relates to a pyrotechnic current isolator which has a housing with an igniter which, in order to separate a conductor, applies pressure to a separating piston which is displaceable in the housing, a signal line also being interrupted when triggered.
  • hybrid vehicles The increase in traffic and the associated pollutant emissions from vehicles are now a major problem, especially in inner-city areas.
  • Electric (BEV) and hybrid vehicles are currently seen as a possible solution, with the latter being predicted to increase.
  • BEV Electric
  • hybrid vehicles are currently seen as a possible solution, with the latter being predicted to increase.
  • the advantage of hybrid vehicles is that a motor / generator element is used for the frequent starting and braking processes, which has a high degree of efficiency when starting and which feeds the energy back into the power storage unit when braking.
  • This energy storage device which is small compared to a fully electric vehicle, still has a very high short-circuit current, which must be reliably switched off in the event of damage.
  • Autokowski uses a magnet in the separating piston, which triggers an external magnetic switch.
  • a signal cable is provided in the Autoliv PSS3, which should be cut in addition to the conductor during the cutting process.
  • a top plate is provided here, which provides a guide for the signal line. The cutting of the signal cable serves to prove that the conductor has been cut.
  • the piston has a protruding nose for the signal cable, under which the signal cable is arranged. The signal cable is fixed in the top plate on both sides of the nose.
  • the object of the present invention is to simplify the construction of the current isolator and thereby reduce the manufacturing costs.
  • a loop can be attached to the housing with significantly less manufacturing effort. However, with a normal piston - even if it has a nose - there is a risk that the loop will be pressed into the small gap between the piston and the housing and will not be severed. However, this is reliably prevented as a result of the pin of the separating piston, which engages in the loop.
  • the separating device is preferably designed in such a way that the signal line is only cut through after the conductor has been separated. In this way, it is impossible for "conductor disconnected" to be incorrectly signaled.
  • the piston After severing the conductor and severing the signal line, the piston preferably serves as insulation for both the interrupted conductor and the interrupted signal cable. In this way it is impossible for the signal line to bridge the separation point of the conductor.
  • the separating piston is only fixed in position by the pin engaging the loop. Otherwise, for fixing the position, it is preferred that the separating piston is positioned opposite the conductor by at least one web.
  • An advantageous embodiment of the invention consists in that the housing is composed of an upper part and a lower part, with the igniter and the upper part also being overmolded, as shown in FIG WO 2017/066816 A is known.
  • the electrical contacting of the circuit breaker's ignition circuit can be made, for example, as a pin-type or leadwire variant.
  • the igniter's lead is also encapsulated.
  • the signal line can be designed in one piece.
  • the signal line can be encapsulated with the lower part. In this way, assembly is possible without any problems because when the lower part is placed on the upper part in which the piston is located, the loop wraps around the pin of the piston. However, a common connector for the igniter, which is in the upper part, and the signal line, which is in the lower part, is not possible.
  • the signal line is encapsulated with the upper part, the loop exiting at the separating surface to the lower part and being guided between the upper part and the lower part to the separating piston.
  • the assembly can be done in such a way that the signal line emerges from the upper part first parallel to the direction of movement of the piston, then the piston is inserted, whereupon the loop is bent by 90 ° onto the trend area between the upper part and the lower part and thereby around the pin of the Piston comes to rest. Then the lower part can be attached.
  • the signal line and the igniter have a common plug for connection. This ensures a more economical manufacturing process and is made possible, among other things, by the fact that no additional top plate is required, as is the case with the PSS3 from Autoliv. It is particularly favorable when the plug is part of the housing.
  • both the signal line and the ignition line exit the housing parallel to the conductor plane. This is favorable for a space-saving installation and can be used both when the signal line is encapsulated in the upper part and when it is encapsulated in the lower part.
  • the signal line can have many cross-sectional shapes, but a rectangular cross-section is preferably used. As a result, the signal line comes to rest flat around the pin.
  • Fig. 1 a current isolator according to the invention in section
  • Fig. 2 a variant of this with a different braking of the separating piston
  • Fig. 3 a circuit breaker with an integrated signal line, which is also disconnected when the pyrotechnic switch is triggered, in a section that compares to Figs. 1 and 2 is guided rotated by 90 °
  • Fig. 4 the isolating piston of the isolator from Fig. 3 in perspective view.
  • a circuit breaker 1 according to the invention has a conductor 2 with conductor sections 3a, 3b, the conductor 2 being able to be fixed in the housing through holes 4a, 4b.
  • the housing consists of an upper part 5 and a lower part 6. In the upper part there is an igniter 7 and a separating piston 8 with a groove 9 which contains an O-ring 10.
  • the conductor 2 has two predetermined breaking points 11a, 11b in the interior of the housing, which delimit a central section 12. If this section 12 is separated from the conductor 2, it is also called a circuit board. As far as the design corresponds to the existing concepts.
  • circuit board In order to prevent the cut-off circuit board from coming into contact again, it is necessary for the circuit board to be held in place by structural elements in the lower part 6 after the circuit breaker 1 has been triggered.
  • These structural elements can, for example, have a knob-like design.
  • the separating piston 8 preferably has a concave cutting surface which enables the conductor 2 to be separated cleanly.
  • the upper part 5 and the lower part 6 are held together by screws 13a, 13b, which lead through the conductor 2 and thus not only fix the conductor 2 and hold the housing halves together, but also reinforce them. This means that additional metallic reinforcements are not required.
  • insulation 14a, 14b can prevent contact between the screws 13a, 13b and the conductor sections 3a, 3b. This insulation can be part of the upper or lower part 5 or 6 or a separate part.
  • the screws 13a, 13b are particularly preferably inserted from the side remote from the igniter, as a result of which the heads 15a, 15b of the screws 13a, 13b become a structural reinforcement of the lower part 6. As a result, the blank 12 punched out by the separating piston 8 during the separating process can be safely caught.
  • the collecting chamber 16 for the plate 12 is conical, so that when the plate 12 (and possibly the separating piston 8) is braked, a bending moment is generated on the screws 13a, 13b and these serve as structural reinforcement. This bending moment presses the screws against the plastic in the transverse direction, which increases their axial holding force.
  • the screws 13a, 13b can also be inserted from the igniter side.
  • screws with plastic threads are preferred. Compared to metric screws, these have a large pitch, significantly more material between the threads and a characterized largely axial load on the carrier material. Particularly preferred are screws with pull-out forces of at least 500 N.
  • the screws can be equipped with a safeguard against automatic loosening (for example in the event of vibration), for example by means of serrations or ribs on the screw head.
  • the screws can have a contour on the head for transmitting the screwing and tightening torque, which becomes ineffective when a defined torque is reached, for example if part of the head is torn off. This effectively prevents disassembly.
  • a seal 17 is provided; this is particularly preferably sprayed onto the conductor 2 and consists of conventional sealing materials, for example EPDM or TPE with approx. 70 Shore; here, too, the fixation of the conductor sections 3a helps , 3b during and after the separation process by the screws 13a, 13b to ensure the tightness.
  • Fig. 2 Another design is shown in which the separating piston 8 is designed as a stepped piston and the position of the predetermined breaking points 11a, 11b and the diameter of the collecting chamber 16 are adapted to the smaller diameter 19 remote from the fuse.
  • the smaller diameter 19 remote from the fuse separates the central section 12 of the conductor 2 when the igniter 7 is activated from the conductor 2, the conductor sections 3a, 3b subsequently serving as a path limitation for the separating piston 8 and therefore the fixing of the conductor ends by the screws is particularly cheap.
  • the step of the piston is inclined (frustoconical), forces act on the conductor sections 3a, 3b in their longitudinal direction, whereby the screws are in turn pressed laterally against the plastic.
  • a current isolator 1 of the type described above can also be equipped with an additional isolating device for a signal line 18, as shown in FIG Fig. 3 is shown.
  • This additional separating device generally only becomes effective after the conductor 2 has been separated, in order to document the separating process and to initiate any subsequent steps.
  • a separating piston 8 according to the invention in combination with the signal line 18 is shown in FIG Fig. 4 shown.
  • the separating piston 8 has a predetermined orientation to the conductor 2, which is ensured in the exemplary embodiment by tabs 16a, 16b.
  • the signal line 18 has two ends 19a, 19b and a separating area 20.
  • a pin 21 of the separating piston 8 engages in the separating area 20 of the signal line 18.
  • the igniter 7 is ignited, the separating piston 8 separates the central section 12 of the conductor 2, and the pin 21 of the separating piston 8 tears the signal line 18 through.
  • the geometry of the separating area of the signal line 18 and the pin 21 is designed in such a way that the conductor 2 is separated first and only then is the signal line 18 separated. An embossing of the signal line 18 ensures a more precise definition of the tear-off point.
  • the separating piston 8 ensures the insulation between conductor 2 and signal line 18 before, during and after the separating process.
  • the assembly is particularly advantageous in that the conductor loop of the signal line 18 protrudes downwards from the upper part 5 after the encapsulation, the separating piston 8 with O-ring 10 is inserted and the conductor loop of the signal line 18 on the interface between the upper part 5 and the lower part 6 and over the pin 21 of the separating piston 8 is bent, after which the lower part 6 is placed and screwed on.
  • the signal line can be made in one piece.
  • the signal line is a wire or a stranded wire, which preferably has no insulation in the separation area and is injected into the housing.
  • the igniter 7 and the ignition line are also injected into the upper part, it is particularly advantageous if the signal line 18 is also injected into the housing, specifically in the lower part 6.
  • the cables of the ignition line leave the upper part 5 parallel to the conductor plane, and the cables of the signal line 18 leave the lower part 6 also parallel to the conductor level, particularly preferably the ignition line and the signal line exit in the same direction. If necessary, a plug connection can also be attached here.
  • the watertightness of this system can be achieved by a sealing ring - as shown above - mostly in combination with a (four-pole) watertight plug or two (two-pole) watertight plugs.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)

Claims (13)

  1. Sectionneur pyrotechnique (1), comportant un boîtier muni d'un détonateur (7) qui exerce une pression sur un piston de sectionnement (8) pouvant être déplacé au sein dudit boîtier pour ainsi sectionner un conducteur électrique (2), un tel déclenchement provoquant également l'interruption d'une ligne de transmission de signaux (18), la ligne de transmission de signaux (18) étant réalisée sous forme d'une boucle, caractérisé en ce qu'un doigt (21) du piston de sectionnement (8) est engagé dans ladite boucle.
  2. Sectionneur pyrotechnique (1) selon la revendication 1, caractérisé en ce que la ligne de transmission de signaux (18) n'est sectionnée qu'après le sectionnement du conducteur électrique (2).
  3. Sectionneur pyrotechnique selon les revendications 1 ou 2, caractérisé en ce qu'une fois une sectionneur (1) déclenché, l'interruption de la ligne de transmission de signaux (18) crée un site de sectionnement sur la ligne de transmission de signaux (18) et que ledit site de sectionnement est isolé vis-à-vis du conducteur électrique (2) par le piston de sectionnement (8).
  4. Sectionneur pyrotechnique (1) selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins un élément d'écartement permet de positionner le piston de sectionnement (8) par rapport au conducteur électrique (2) .
  5. Sectionneur pyrotechnique (1) selon l'une des revendications 1 à 4, caractérisé en ce que le boîtier est composé d'une partie supérieure (5) et d'une partie inférieure (6), la partie supérieure (5) étant réalisée par moulage par injection en englobant le détonateur (7).
  6. Sectionneur pyrotechnique (1) selon la revendication 5, caractérisé en ce que le détonateur (7) comporte des lignes d'alimentation et que la partie supérieure (5) du boîtier est réalisée par moulage par injection en englobant lesdites lignes d'alimentation.
  7. Sectionneur pyrotechnique (1) selon les revendications 5 ou 6, caractérisé en ce que la partie inférieure (6) est réalisée par moulage par injection en englobant la ligne de transmission de signaux (18).
  8. Sectionneur pyrotechnique (1) selon les revendications 5 ou 6, caractérisé en ce que la partie supérieure (5) et la partie inférieure (6) sont assemblées au niveau d'une face de séparation, la partie supérieure (5) étant réalisée par moulage par injection en englobant la ligne de transmission de signaux (18), ladite boucle en faisant saillie au niveau de ladite face de séparation avec la partie inférieure (6) pour ainsi s'étendre entre la partie supérieure (5) et la partie inférieure (6) vers le piston de sectionnement (8).
  9. Sectionneur pyrotechnique (1) selon les revendications 5 et 8, caractérisé en ce que la ligne de transmission de signaux (18) et le détonateur (7) sont dotés d'une fiche de connexion commune.
  10. Sectionneur pyrotechnique (1) selon la revendication 9, caractérisé en ce que ladite fiche fait partie dudit boîtier.
  11. Sectionneur pyrotechnique (1) selon les revendications 6 ainsi que 7 ou 8, caractérisé en ce que le conducteur électrique (2) présente un plan de conducteur, la ligne de transmission de signaux (18) et la ligne de détonation quittant ledit boîtier parallèlement à ce plan de conducteur.
  12. Sectionneur pyrotechnique (1) selon l'une des revendications 1 à 11, caractérisé en ce que la ligne de transmission de signaux (18) est réalisée en une seule pièce.
  13. Sectionneur pyrotechnique (1) selon l'une des revendications 1 à 12, caractérisé en ce que la ligne de transmission de signaux (18) possède un profil rectangulaire.
EP19194918.9A 2018-09-02 2019-09-02 Sectionneur de courant pyrotechnique Active EP3618089B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50748/2018A AT521345B1 (de) 2018-09-02 2018-09-02 Pyrotechnischer Stromtrenner

Publications (3)

Publication Number Publication Date
EP3618089A2 EP3618089A2 (fr) 2020-03-04
EP3618089A3 EP3618089A3 (fr) 2020-03-11
EP3618089B1 true EP3618089B1 (fr) 2021-04-14

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EP19194918.9A Active EP3618089B1 (fr) 2018-09-02 2019-09-02 Sectionneur de courant pyrotechnique

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EP (1) EP3618089B1 (fr)
AT (1) AT521345B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023124512A1 (de) * 2023-09-12 2025-03-13 Bayerische Motoren Werke Aktiengesellschaft Pyrotechnische Abschalteinrichtung für ein mehradriges Stromkabel eines Hochvoltbordnetzes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10111252A1 (de) * 2001-03-09 2002-09-26 Daimler Chrysler Ag Anordnung zum Schutz von Vebrauchern
DE102004023415A1 (de) 2003-07-29 2005-03-31 Dynamit Nobel Ais Gmbh Automotive Ignition Systems Pyrotechnisch angetriebene Trennvorrichtung zum Trennen von massiven, kompakten Materialien
DE102010035684A1 (de) 2010-08-27 2012-03-01 Auto-Kabel Managementgesellschaft Mbh Elektrische Trennvorrichtung sowie Verfahren zum elektrischen Trennen von Anschlussteilen mit Hilfe einer Trennvorrichtung
DE102010045726B4 (de) * 2010-09-07 2013-01-10 Fele Gmbh & Co. Kg Sicherungsvorrichtung und Verfahren zur Herstellung einer Sicherungsvorrichtung
DE102012013491B3 (de) * 2012-07-09 2013-09-26 Auto-Kabel Managementgesellschaft Mbh Elektrische Trennvorrichtung mit Sensorüberwachung
AT517872B1 (de) 2015-10-19 2017-08-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnische Trennvorrichtung
DE102017207736B3 (de) * 2017-05-08 2018-08-23 Leoni Bordnetz-Systeme Gmbh Pyrotechnischer Schutzschalter und Versorgungsnetz mit einem pyrotechnischen Schutzschalter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
AT521345B1 (de) 2020-01-15
EP3618089A3 (fr) 2020-03-11
AT521345A4 (de) 2020-01-15
EP3618089A2 (fr) 2020-03-04

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