• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A gas generator, preferably an igniter (3), is accommodated in a housing (2) and surrounded by a section of the conductor (1) with a rectangular cross-section. The wrap angle is in particular around 270 °. When igniting the gas generator, the conductor (1) is pressurized, so that in the conductor (1), a tensile stress and this is separated. According to the invention, the longitudinal axis of the gas generator is parallel to the generatrices of the section of the conductor (1) and the conductor (1) in the normal plane to the generatrices in the majority of the section at a distance from the housing (2) sufficient for expansion of the conductor ( 1) when disconnecting. As a result, the conductor (1) can be separated with only little bending work, and there is enough space available for the supply line to the detonator. For sealing, a gas-tight elastic cup (7) may be provided, or at least a plane seal. The igniter (3) may be surrounded by extinguishing agent or by additional propellant. A projection (6) is intended to mechanically prevent springback of the separate conductor ends and thus their re-contacting.
    公开号:AT517907A1
    申请号:T50888/2015
    申请日:2015-10-19
    公开日:2017-05-15
    发明作者:
    申请人:Hirtenberger Automotive Safety Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The present invention relates to a pyrotechnic separation device for a conductor in which a gas generator, preferably an igniter, housed in a housing and is wrapped by a cylindrically curved portion of the conductor having a rectangular cross-section, wherein the wrap angle greater than 180 °, preferably greater than 250 °, in particular about 270 °, and wherein upon ignition of the gas generator, the conductor is pressurized, so that in the conductor, a tensile stress and this is separated.
    The term "cylindrical" is used here in the sense of the mathematically defined cylinder: a plane curve is shifted along a straight line (which is not in the plane of the curve) by a certain distance; each two corresponding points of the two curves are connected by a route; the totality of these parallel sections forms the associated cylindrical surface. The plane curve does not have to be closed, and certainly not the term "cylinder" is to be understood as a circular cylinder.
    Battery safety systems have the task in automotive safety of switching off certain circuits in the event of an accident in order to minimize the risk of a fire. The safety-related systems continue to be supplied with power; consumers that are not required for emergency operation are disconnected from the power supply in order to reduce the risk of fire in the event of a short circuit.
    The development of this circuit breaker is already very old, the first switches were to operate manually after the accident. Since the driver is not always able to do so as a result of the accident, automated solutions were sought.
    Naturally, these first consisted of available electromechanical components, as exemplified in DE 29613221 U by Gebauer and Griller. Further, it is convenient to use relays and related constructions for the purpose of powering down, such as e.g. in DE 19911128 CI by Tyco Electronics.
    These electromechanical systems have the disadvantage that they require a high energy for actuation, which must be provided by means of power semiconductors and wiring in a corresponding cross-section. If these switches are open when de-energized, a permanent current flow through the coil is necessary for the ferry operation. In addition, the effects of mechanical shock caused by the ferry operation can cause minute power interruptions that can cause malfunction or damage to sensitive equipment. The latter also applies to the group of disconnectors, in which the conductor ends are connected by a press fit in normal operation, which is opened pyrotechnic when needed, for example, shown in US 6144111 A of BMW. Vibrations and thermal expansion during heating cause a creeping decrease in the bond over the service life, until the effects mentioned above also occur.
    The next step was equipment, which has a continuous conductor, which is separated if necessary. In DE 10209626 Al and DE 10209625 Al of MBB a conductor is described, which has inside an axially positioned explosive charge, which destroys the conductor if necessary. The main problem of this design is that detonator and ignition cable are permanently heated and aged by the current flow in the conductor. For this application, special lighters are used with special temperature resistance, which do not meet the normal automotive standards in terms of their electrical properties and require special control.
    To avoid this disadvantage, it has also been proposed to position the igniter next to the line and to separate the line by means of a punch, as shown in the patent applications of Dynamit Nobel DE 102004008120 Al and DE 102004010071 Al. DE 102004008120 A1 describes a separating element in which a continuous current conductor rail is arranged at 90 ° to the separation point, DE 102004010071 Al the Schnittmatritze as an independent, inserted latch, wherein in the figures also the principle of DE 102004008120 Al is used for illustration.
    In a further development of this idea, the separating element according to EP 1469564 Bl of Autoliv is mounted directly on the battery pole, with two clamping arms are provided for cable connections. A clamping arm is fixed in the housing and constantly connected to the battery terminal, the second clamping arm, which can be separated by an acted upon by a pyrotechnic element separating element from the battery, has a thickening, with which it is fixed immovably in the housing.
    The current state of these developments is shown in EP 1883091 Al, the principle of construction and assembly is shown in FIG. 4. It can also be seen here that the current conductor still has a very complex shape. It is made by punching a board and multiple folding. Naturally, during production from the board, stamping waste of copper is produced, which should be avoided.
    From the generic DE 69913399 T2 (corresponding to EP 936647 Bl), a pyrotechnic separation device is known which manages without a punch. According to this document, a conductor with a rectangular cross-section is bent in a U-shape around a substantially rectangular detonator. The igniter has a housing having an opening in one direction to focus the resulting gases in that direction. Opposite this opening is the connecting the two legs of the U connecting section, which is weakened in the region of the opening. With respect to the igniter, the opening is opposite the terminals, i. the longitudinal axis of the igniter is directed to the weakened point of the conductor. The two legs of the U are fixed between the housing and the igniter, so they can not bend when ignited. So that the conductor can be separated, a corresponding space is provided on the side facing away from the igniter of the conductor in the region of the weakened point, in which the two in the
    Detach separation emerging ends of the conductor (see Fig. 6 of this document).
    This solution has several disadvantages. It is a case for the detonator necessary, which increases the cost. The conductor must be bent relatively strong, so that the resulting at the separation ends get a sufficient distance; The bending work must be applied by the igniter, which therefore has to be made stronger. Finally, there is little space available for the lead to the igniter, because the longitudinal axis of the igniter is directed to the weakened point of the conductor, so that the supply line between the ends of the legs of the U must be made.
    It is an object of the present invention to provide a pyrotechnic separation device which avoids these disadvantages.
    This object is achieved by a pyrotechnic separation device of the aforementioned type according to the invention that the longitudinal axis of the gas generator is parallel to the generatrix of the cylindrically curved portion of the conductor and that the conductor in the normal plane to the generatrices in the majority of the section has a distance from the housing which is sufficient for the expansion of the conductor during separation.
    According to the invention, the igniter has no housing. Since the longitudinal axis of the igniter is parallel to the generatrix of the conductor (ie normal to the plane in which the conductor is bent), a uniform gas pressure results radially on the wrapping part of the conductor and causes a tensile stress in the conductor material (analogous to a pressure vessel ), which leads to the separation of the conductor. In this case, sufficient space between the conductor and housing is provided in the radial direction, which allows the conductor the space to expand to break and separation between the resulting conductor ends a sufficient distance. In contrast to DE 69913399 T2 almost no bending work must be done. Since the longitudinal axis of the igniter is parallel to the generatrix of the conductor, the supply to the igniter is not a problem, because this is simply "from the side", i. parallel to the generatrix, normal to the plane in which the conductor is bent.
    In order for the separation to occur reproducibly, the conductor can have at least one predetermined breaking point, which is oriented parallel to the longitudinal axis of the gas generator. Conveniently, the predetermined breaking point is designed as a notch. Preferably, the weakened region of the conductor is located on the side facing away from the gas generator (preferably detonator), on this side, the material weakening is particularly effective. The production can be carried out by bending and subsequent embossing of the predetermined breaking point, alternatively, the conductor including the predetermined breaking point can be extruded and cut to width.
    In order to reduce or prevent pressure losses through leakage at air gaps between the conductor on the one hand and the housing or cover on the other hand, one or more sealing elements are provided at the locations of the air gap between the igniter and the conductor housing cover. For this purpose, at least one face seal made of elastomer can be provided for sealing between the housing and the conductor; In this way, the gas pressure acts almost lossless on the head. The face seal preferably has additional sealing lips for generating a local pressure. In this case, the seals are thus positioned locally specifically at the air gaps.
    The igniter can be surrounded by extinguishing agents, such as quartz sand or silicone, to quickly extinguish an eventual arc when disconnected.
    As an alternative to face seals, the igniter may be surrounded by a gas-tight elastic cup located between the igniter and the conductor, thus transmitting to the conductor the gas pressure produced upon ignition. If the cup surrounds the gas generator (igniter) tightly, the pressure is transmitted in this way almost lossless on the conductor. The seal can thus surround the igniter like a balloon.
    In this case, it is advantageous if the notch on the side facing the cup of the conductor is executed. In the variant with elastic cup, this expands until it comes to rest with the conductor. By transmitting the pressure on the conductor, tensile stresses are generated in the conductor, which lead to the demolition of the conductor. If the notch is located on the outside, a sharp-edged tear-off point is formed inside and can lead to premature bursting of the cup. On the other hand, if the notch is on the inside, i. the igniter or cup side facing the cup is after tearing of the conductor on the transition between the conductor and the wall of the notch, which is not sharp-edged. This results in a lower load of the cup material and subsequently to a stronger separation of the conductor ends.
    In this case, if an extinguishing agent, such as silica sand or silicone, is to be provided in order to rapidly extinguish a possible arc during separation, this must be arranged between the cup and the conductor.
    The igniter may be surrounded by additional propellant if its explosive power alone is insufficient.
    Finally, a projection, e.g. a rib, in the housing to ensure that the conductor ends are kept in the expanded form to prevent re-contact.
    The structure of the separating device can be kept particularly simple if the conductor is bent outwards at the two ends of the loop, so that the two conductor ends are aligned, and if it is held at the bending points by deflection points in the housing. Thus, the housing also provides the strain relief for the conductor, and the head roughly resembles the shape of the Greek letter Omega.
    With reference to the accompanying drawings, the invention will be explained in more detail. In Fig. 1, an embodiment of the separating device according to the invention is shown in section, wherein the section is guided parallel to the ends of the conductor and through the igniter; Fig. 2 is a section along the line II-II in Fig. 1; and Fig. 3 is a perspective view of the separator.
    A conductor 1 (see Fig. 2) is located in a housing 2, wherein it wraps around an electric igniter 3 to about 270 °. Deflection points 4, 4 'of the housing 2 are used for fixing and strain relief of the conductor 1. A predetermined breaking point 5 represents the weakening of the conductor 1, at which the conductor 1 is separated when pressure is applied by the igniter 3. A projection 6 prevents after ignition the springing of the separated conductor ends.
    In the view of Fig. 1, the electric igniter 3, surrounded by a cup 7 within the conductor 1, can be seen. The cup 7 is made of elastic material and ensures the inclusion of the hot gases of the igniter 3 to the successful separation of the conductor 1. The cup 7 expands when it is like a balloon until the head breaks.
    The closure of the housing 2 by means of a lid 8, and the electrical connection of the igniter via an interface 9. The space 10 between igniter 3 and cup 7 can either with additional propellant to increase performance or with extinguishing agents, such as silica sand or silicone, for elimination be filled in the separation of any occurring arc.
    权利要求:
    Claims (13)
    [1]
    13/46582 Hirtenberger Automotive Safety GmbH & Co KG A-2552 Hirtenberg (AT) Claims:
    1. A pyrotechnic separation device for a conductor (1), in which a gas generator, preferably an igniter (3), housed in a housing (2) and by a cylindrically curved portion of the conductor (1) is wrapped with a rectangular cross-section, wherein the Wrap angle greater than 180 °, preferably greater than 250 °, in particular about 270 ° and wherein upon ignition of the gas generator, the conductor (1) is pressurized, so that in the conductor (1), a tensile stress and this is separated, characterized in that the longitudinal axis of the gas generator is parallel to the generatrices of the cylindrically curved portion of the conductor (1) and that the conductor (1) in the normal plane to the generatrices in the majority of the portion is spaced from the housing (2) sufficient for expansion of the conductor (1) when disconnecting.
    [2]
    2. Pyrotechnic separating device according to claim 1, characterized in that the conductor (1) has at least one predetermined breaking point (5), which is oriented parallel to the longitudinal axis of the gas generator.
    [3]
    3. Pyrotechnic separating device according to claim 2, characterized in that the predetermined breaking point (5) is designed as a notch.
    [4]
    4. Pyrotechnic separating device according to claim 3, characterized in that the notch on the gas generator (2) facing away from the side is executed.
    [5]
    5. Pyrotechnic separating device according to one of claims 1 to 4, characterized in that for sealing between the housing (2) and conductor (1) is provided at least one face seal made of elastomer.
    [6]
    6. Pyrotechnic separating device according to claim 5, characterized in that the plane seal has additional sealing lips.
    [7]
    7. Pyrotechnic separating device according to one of claims 1 to 6, characterized in that the igniter (3) of extinguishing agent, such as quartz sand or silicone, is surrounded.
    [8]
    8. Pyrotechnic separating device according to one of claims 1 to 3, characterized in that the igniter (3) by a gas-tight elastic cup (7) is surrounded, which is arranged between the igniter (3) and the conductor (1) and thus the Gas pressure generated at ignition, transfers to the conductor (1).
    [9]
    9. Pyrotechnic separating device according to claim 3 and claim 8, characterized in that the notch on the cup (7) facing side of the conductor (1) is executed.
    [10]
    10. Pyrotechnic separating device according to claim 8 or 9, characterized in that between the cup (7) and the conductor (1) an extinguishing agent, such as quartz sand or silicone, is provided.
    [11]
    11. Pyrotechnic separating device according to one of claims 1 to 6 or 8 to 10, characterized in that the igniter (3) is surrounded by additional propellant.
    [12]
    12. Pyrotechnic separating device according to claim 2 and optionally one of claims 3 to 11, characterized in that the housing (2) in the region of the predetermined breaking point (5) has a projection (6), the return springs of the separated conductor ends and thus their re-contacting mechanically prevented.
    [13]
    13. Pyrotechnic separating device according to one of claims 1 to 12, characterized in that the conductor (1) is bent at the two ends of the loop to the outside, so that the two conductor ends are aligned, and that it at the bending points by deflection points (4, 4th ') is held in the housing (2).
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    同族专利:
    公开号 | 公开日
    DE102016119621A1|2017-04-20|
    AT517907B1|2019-06-15|
    DE102016119621B4|2020-09-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE202004017709U1|2004-11-15|2006-03-23|Veigel, Andreas, Ing.|Pyrotechnical switch for disconnecting electrical current circuit, has pressure source arranged in hollow space, and conducting section that is movable is contactlessly supported in housing in new condition|
    DE19606447A1|1996-02-21|1997-08-28|Bayerische Motoren Werke Ag|Circuit breaker for a battery cable in vehicles|
    DE29613221U1|1996-04-04|1996-10-17|Kabelkonfektion Gebauer & Gril|Device for interrupting the flow of current in a cable|
    US6222439B1|1998-02-17|2001-04-24|Sumitomo Wiring Systems, Ltd.|Circuit breaking device|
    DE19911128C1|1999-03-12|2000-12-28|Tyco Electronics Logistics Ag|Electromechanical battery disconnection switch for automobile has fixed contact provided by one lead cooperating with movable contact carried by contact spring attached to other lead held closed by releasable catch|
    DE10209625A1|2002-03-05|2003-10-02|Mbb Airbag Systems Gmbh|Pyrotechnic cutout for switching off a load e.g. in motor vehicle, has an ignition circuit, an operating current insulated from connection pieces and thermal separation between the connection pieces.|
    DE10209626B4|2002-03-05|2005-02-03|Mbb Airbag Systems Gmbh|Pyrotechnic switch|
    DE102004008120A1|2003-02-26|2004-11-25|Dynamit Nobel Ais Gmbh Automotive Ignition Systems|Pyromechanical separating device with specially shaped current conducting rail has cable connectors at both end pieces at right angles to plane of separating point formed by conductor narrow point|
    DE102004010071A1|2003-03-12|2004-09-23|Dynamit Nobel Ais Gmbh Automotive Ignition Systems|Pyro-mechanical separating device for electrically decoupling a battery having a bolt forming a bearing for a separating bit|
    EP1469564B1|2003-04-17|2012-12-05|Autoliv Development AB|Pyrotechnical battery terminal|
    DE502006008608D1|2006-07-25|2011-02-10|Autoliv Dev|Pyromechanical separator|EP3800655A1|2019-10-02|2021-04-07|Peter Lell|Quick disconnect switch|
    GB2591826A|2020-02-10|2021-08-11|Eaton Intelligent Power Ltd|Electrical interrupter with actuator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50888/2015A|AT517907B1|2015-10-19|2015-10-19|Pyrotechnic separator|ATA50888/2015A| AT517907B1|2015-10-19|2015-10-19|Pyrotechnic separator|
    DE102016119621.5A| DE102016119621B4|2015-10-19|2016-10-14|Pyrotechnic separator for a conductor|
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