EP2081208A1 - Dispositif de séparation pyromécanique - Google Patents

Dispositif de séparation pyromécanique Download PDF

Info

Publication number
EP2081208A1
EP2081208A1 EP08000966A EP08000966A EP2081208A1 EP 2081208 A1 EP2081208 A1 EP 2081208A1 EP 08000966 A EP08000966 A EP 08000966A EP 08000966 A EP08000966 A EP 08000966A EP 2081208 A1 EP2081208 A1 EP 2081208A1
Authority
EP
European Patent Office
Prior art keywords
separating
housing
pistons
drive element
separating device
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
EP08000966A
Other languages
German (de)
English (en)
Other versions
EP2081208B1 (fr
Inventor
Gerhard Kordel
Claus-Werner Deutschmann
Thomas Dr. Schulz
Rainer R. Dr. Mäckel
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.)
Mercedes Benz Group AG
Delphi Technologies Inc
Original Assignee
Daimler AG
Delphi Technologies Inc
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 Daimler AG, Delphi Technologies Inc filed Critical Daimler AG
Priority to EP08000966A priority Critical patent/EP2081208B1/fr
Priority to DE502008000492T priority patent/DE502008000492D1/de
Priority to AT08000966T priority patent/ATE463040T1/de
Priority to JP2009007170A priority patent/JP5028434B2/ja
Publication of EP2081208A1 publication Critical patent/EP2081208A1/fr
Application granted granted Critical
Publication of EP2081208B1 publication Critical patent/EP2081208B1/fr
Not-in-force 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
    • 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 pyromechanical separation device.
  • Pyromechanical separators are well known and typically include a housing forming a pressure chamber and a separator piston disposed in the pressure chamber that is movable relative to the housing upon application of a pressure pulse generated by a pyrotechnic driver to sever a conductor disposed within the housing.
  • Such pyromechanical separation devices are used for example in motor vehicles to disconnect an electrical system from the vehicle battery in an accident.
  • the pyromechanical separation devices may for this purpose be connected to a central control unit (ECU), which is additionally provided with at least one safety device, e.g. a belt tensioner and / or an airbag, is in communication and which transmits an electrical release signal to the drive element of the pyromechanical separation device and the at least one safety device in an accident.
  • ECU central control unit
  • Modern motor vehicles not only have a large number of to-be-controlled safety devices for personal protection, but may also comprise a plurality of separate electric circuits, for example in a hybrid drive technology and / or to provide a start / stop functionality in an accident respectively a pyrotechnic separator must be interrupted or disconnected from a power source.
  • a central control unit provided for controlling the safety devices and the pyrotechnic isolators usually has a limited number of control outputs, which may not be sufficient to handle all the safety devices, e.g. Airbags and belt tensioners, as well as all pyrotechnic separating elements to be able to control.
  • the invention has for its object to enable the transection of a number of circuits, which is greater than the number of available control outputs of a central control unit.
  • a pyromechanical separation device with the features of claim 1 is provided.
  • the separating device has a housing forming a pressure chamber and at least two separating pistons arranged in the pressure chamber, which are movable relative to the housing when acted upon by a pressure pulse generated by a pyrotechnic drive element to sever at least two arranged in the housing conductor.
  • the invention is thus based on the general idea of severing a plurality of current conductors by means of a single pyromechanical separation device and in particular by means of a single drive charge, and thus interrupting a plurality of circuits.
  • the separating device provides at least two separating pistons, which require only a pyrotechnic driving element and, for driving, only a single control output on a control unit provided for triggering the separating device.
  • control unit has eight control outputs, seven of which are already used to control safety devices, such as those shown in FIG. Airbags and / or belt tensioners are occupied, the last remaining control output can be used to cut with the aid of the separation device according to the invention two or more circuits, i. the central control unit does not need to have a corresponding number of free control outputs.
  • the separator according to the invention further has a compact design and is at most insignificantly larger than a conventional disconnecting device for interrupting a single circuit.
  • the separating pistons are movable in different directions. This is made possible by the propagation of a pressurized gas released by the drive element into an area located at least partially between the separating pistons, preferably a central region of the pressure chamber, whereby a particularly efficient admission of the separating pistons and thus a particularly rapid and reliable severing of the conductors is achieved.
  • At least two of the separating pistons can be movable in opposite directions and / or at least two of the separating pistons can be moved transversely to one another.
  • the drive element and the separating piston preferably extend in a plane.
  • the separating piston and the drive element can be arranged in a T-shape, with the separating pistons extending in one direction, while the drive element is oriented at right angles thereto.
  • a Y-shaped arrangement of the separating piston and the drive element is conceivable.
  • a drive element and three separating pistons can be arranged crosswise or X-shaped or arrange a drive element and more than three separating pistons in a star shape, so that a correspondingly higher number of separating pistons can be acted upon by a single pyrotechnic drive element and a corresponding one Number of circuits can be interrupted by means of a single separator.
  • At least one of the separating pistons forms an angle with a plane defined by the driving element and another separating piston.
  • each separating piston preferably has a cutting bit for cutting through a corresponding current conductor.
  • the number of circuits to be interrupted by the disconnecting device can be further increased if at least one of the separating pistons has at least two separating tools for cutting through a number of conductors corresponding to the number of separating tools.
  • a separation device is further provided by which by means of a single pyrotechnic Drive elements also cut through several conductors and thus achieve the mentioned advantages.
  • a pyromechanical separation device 10 for substantially simultaneous interruption of two circuits 70, 72 (FIG. Fig. 5 ).
  • the separation device 10 comprises a housing 12 in which two rail-like current conductors 14 are arranged, which are each formed from a multi-folded sheet metal strip 16. In the region of their ends, the sheet metal strips 16 each have a connecting piece 18, which allows an electrical connection of the current conductor 14 to a respective circuit 70, 72.
  • a pyrotechnic drive element 20 is further arranged, which comprises a space containing a pyrotechnic fuel or fuel space portion 22, which points into the interior of the housing 12.
  • the drive element 20 At its rear side remote from the installation space section 22, the drive element 20 further comprises a contacting section 24, which projects at least partially out of the housing 12 and which connects the electrical connection of the drive element 20 to a control unit 68 (FIG. Fig. 5 ) to trigger the separator 10 allows.
  • the drive element 20 is pressure-tightly connected to the housing 12, for example by acting as in Fig. 2 shown inserted into a recess 26 of the housing 12 and welded or glued in this and additionally secured by sections 28 of the current conductor 14, which engage in corresponding grooves 30 of the drive member 20.
  • a nozzle 32 may be formed on the outside of the housing 12, to which the drive element 20 is attached and secured by an encapsulation 34.
  • a puncture 36 or an at least partially circumferential groove is provided both on the outside of the nozzle 32 and on the outside of the drive element 20, in which or which encapsulation 34 engages.
  • the installation space portion 22 of the drive element 20 defines a central portion 38 of a defined by the housing 12 pressure chamber 40.
  • the pressure chamber 40 further comprises two starting from the central portion 38 in opposite directions extending separating piston 42, in each of which a separating piston 44 is slidably mounted.
  • Each separating piston 44 has a recess 46 on its rear side facing the central section 38, while a separating chisel 48 is formed on the front side of each separating piston 44 facing away from the central section 38, pointing in the direction of a separation point 49 of the current conductor 14 assigned to the separating piston 44.
  • the separating piston 44 In a normal or rest position, i. So before triggering the separator 10, the separating piston 44 are each in a rear end position in which they have a minimum distance from each other and a maximum distance from the conductors 14. In their rear end position, the separating pistons 44 abut with their rear sides against the first shoulders 50 of the housing.
  • each separating piston 44 has, in the region of its front side, a projection 52 which runs around the separating piston circumference and rests on a second shoulder 54 which delimits a peripheral groove 56 which is provided in the housing wall bounding the respective separating piston section 42.
  • a seal is arranged, for example, an O-ring 58, which communicates with the central portion 38 in communication part of the respective separating piston 42 of the pressure chamber 40 against a space 60 between the respective separating piston 44 and the associated Current conductor 14 seals gas-tight substantially.
  • the O-ring 58 as in Fig. 3 is also shown to be disposed between the back of the separating piston 44 and the corresponding first housing shoulder 50.
  • the separating device 10 If the separating device 10 is triggered upon activation of the drive element 20, the fuel located in the installation space section 22 ignites, and the installation space section 22 bursts on its front side facing the central section 38.
  • a gas pressure builds up in the pressure chamber 40, which acts on the separating pistons 44 in opposite directions and thus in the direction of their respective current conductors 14.
  • the projections 52 of the separating pistons 44 are sheared off and the separating pistons 44 are accelerated in the direction of their respective current conductor 14.
  • the current conductors 14 By striking the current conductor 14 separating tool 48, the current conductors 14 are shunted at their separation points 49 and the respective circuits interrupted. In order to facilitate the severing of the current conductors 14, the current conductors 14 have a reduced strength at their separation points 49. In addition, the current conductors 14 in the region of the separating points 49 are each supported by a shearing edge 62.
  • a third embodiment of a separating device 10 according to the invention is shown, which is provided for at least approximately simultaneous severing of four conductors 14 and thus four circuits can interrupt substantially simultaneously.
  • each separating piston 44 has on its front side two tongue-like cutting tools 48, which are arranged in a plane extending side by side.
  • Each separating chisel 48 is assigned a separate current conductor 14, so that the separating device 10 comprises a total of four current conductors 14 to be cut through.
  • the four current conductors 14 are mounted in pairs in such a way in the housing 12 that, when the separating pistons 44 impinge on the current conductors 14, each current conductor 14 is severed by one of the separating tools 48.
  • the in Fig. 4 shown conductor 14 is not bent several times, but plan formed.
  • the current conductors 14 of each pair of current conductors lie in a plane which extends at least approximately at right angles to the plane defined by the separating chisel 48. In order to facilitate the severing of the current conductors 14, these also each have a separation point 49 with reduced strength.
  • the drive element 20 of the in Fig. 4 shown separating device 10 received in a housing insert 63 which is inserted into the housing 12 and connected substantially gas-tight therewith.
  • the housing insert 63 defines a gas passage 65 through which the gas released by the drive member 20 acts to more efficiently act upon the separating piston 44 is deflected into the recesses 46 of the separating piston 44.
  • circuits 70, 72 are shown, which can be interrupted by a separator 10 according to the first embodiment.
  • FIG. 5a schematically a separator 10 with two movable in opposite directions separating piston, shown by the arrows 64, which can be acted upon by a drive element 20 which is connected by electrical lines 66 to a control unit 68 for activating the separator 10.
  • two conducting conductors 14 arranged in the separating device 10 can be cut through by the separating pistons, wherein one current conductor 14 is part of a first circuit 70 which connects one connection point A to one connection point B, while the other current conductor 14 forms part of a second circuit 72 is, which connects a connection point C with a connection point D.
  • the circuits 70, 72 are electrically isolated from each other.
  • the circuits 70, 72 may have the same or different potentials or polarities.
  • the connection points A and B of the first circuit 70 on the one hand and the connection points C and D of the second circuit 72 on the other hand are electrically separated from each other.
  • a second circuit variant is shown, which differs from the in Fig. 5a shown variant differs in that in addition the connection points B and D are interconnected.
  • both circuits 70, 72 have the same potential and the same polarity.
  • Fig. 5c shows a third circuit variant, which differs from the in Fig. 5b shown second variant differs in that in addition the connection points A and C are electrically connected to each other.
  • the circuits 70, 72 also have the same potential and the same polarity.

Landscapes

  • Fuses (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Surgical Instruments (AREA)
EP08000966A 2008-01-18 2008-01-18 Dispositif de séparation pyromécanique Not-in-force EP2081208B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08000966A EP2081208B1 (fr) 2008-01-18 2008-01-18 Dispositif de séparation pyromécanique
DE502008000492T DE502008000492D1 (de) 2008-01-18 2008-01-18 Pyromechanische Trennvorrichtung
AT08000966T ATE463040T1 (de) 2008-01-18 2008-01-18 Pyromechanische trennvorrichtung
JP2009007170A JP5028434B2 (ja) 2008-01-18 2009-01-16 火工式分離デバイス

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08000966A EP2081208B1 (fr) 2008-01-18 2008-01-18 Dispositif de séparation pyromécanique

Publications (2)

Publication Number Publication Date
EP2081208A1 true EP2081208A1 (fr) 2009-07-22
EP2081208B1 EP2081208B1 (fr) 2010-03-31

Family

ID=39529404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08000966A Not-in-force EP2081208B1 (fr) 2008-01-18 2008-01-18 Dispositif de séparation pyromécanique

Country Status (4)

Country Link
EP (1) EP2081208B1 (fr)
JP (1) JP5028434B2 (fr)
AT (1) ATE463040T1 (fr)
DE (1) DE502008000492D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107128478A (zh) * 2017-05-23 2017-09-05 安徽中科中涣防务装备技术有限公司 一种折叠机翼的快速展开装置
CN118588470A (zh) * 2024-08-06 2024-09-03 比亚迪股份有限公司 断路器组件、电机控制器组件和车辆

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6409651B2 (ja) 2015-03-30 2018-10-24 豊田合成株式会社 導通遮断装置
FR3051282B1 (fr) * 2016-05-16 2021-05-21 Herakles Dispositif de coupure destine a etre relie a un circuit electrique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525475A1 (de) * 1995-02-06 1997-01-16 Bayerische Motoren Werke Ag Sicherungsvorrichtung für eine Stromleitung in Fahrzeugen
WO1997037873A1 (fr) * 1996-04-04 1997-10-16 Kabelkonfektion Gebauer & Griller Gmbh Dispositif pour interrompre le flux de courant dans un cable
FR2775539A1 (fr) 1998-02-27 1999-09-03 Renault Dispositif disjoncteur pour vehicule automobile
DE10008577A1 (de) * 1999-03-03 2000-11-02 Yazaki Corp Stromunterbrechungs-Vorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3173244B2 (ja) * 1993-08-12 2001-06-04 富士電機株式会社 電気自動車の電気システム
EP1464544B1 (fr) * 2003-04-03 2010-09-15 Delphi Technologies, Inc. Boîtier avec une barre conductrice pour un dispositif de sectionnement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525475A1 (de) * 1995-02-06 1997-01-16 Bayerische Motoren Werke Ag Sicherungsvorrichtung für eine Stromleitung in Fahrzeugen
WO1997037873A1 (fr) * 1996-04-04 1997-10-16 Kabelkonfektion Gebauer & Griller Gmbh Dispositif pour interrompre le flux de courant dans un cable
FR2775539A1 (fr) 1998-02-27 1999-09-03 Renault Dispositif disjoncteur pour vehicule automobile
DE10008577A1 (de) * 1999-03-03 2000-11-02 Yazaki Corp Stromunterbrechungs-Vorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107128478A (zh) * 2017-05-23 2017-09-05 安徽中科中涣防务装备技术有限公司 一种折叠机翼的快速展开装置
CN118588470A (zh) * 2024-08-06 2024-09-03 比亚迪股份有限公司 断路器组件、电机控制器组件和车辆

Also Published As

Publication number Publication date
DE502008000492D1 (de) 2010-05-12
JP5028434B2 (ja) 2012-09-19
EP2081208B1 (fr) 2010-03-31
JP2009174846A (ja) 2009-08-06
ATE463040T1 (de) 2010-04-15

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