EP0895646A1 - Pyrotechnic circuit-breaking element for electric circuits - Google Patents
Pyrotechnic circuit-breaking element for electric circuitsInfo
- Publication number
- EP0895646A1 EP0895646A1 EP97922911A EP97922911A EP0895646A1 EP 0895646 A1 EP0895646 A1 EP 0895646A1 EP 97922911 A EP97922911 A EP 97922911A EP 97922911 A EP97922911 A EP 97922911A EP 0895646 A1 EP0895646 A1 EP 0895646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- separating
- current conductor
- pyrotechnic
- current
- element according
- 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
Links
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
Definitions
- the invention relates to a pyrotechnic fuse element for circuits, as known from DE 42 11 079 AI and DE 44 22 177 AI.
- the pyrotechnic fuse elements known from the prior art according to DE 42 11 079 AI and DE 44 22 177 AI each have a current conductor which can be cut by means of a separating device in the event of overcurrents.
- the conductor is severed by means of a separating or cutting element which acts on a separating section of the conductor.
- the separating device can be operated pyrotechnically by igniting a pyrotechnic charge, the combustion gases released thereby moving the separating device together with the separating or cutting element towards and through the separating section of the current conductor.
- a current conductor can be cut through with the known pyrotechnic fuse elements. With a multi-pole shutdown Several pyrotechnic security elements are required, which is complex.
- the invention has for its object to provide a pyrotechnic fuse element with which several conductors can be cut in a simple manner and at low manufacturing costs.
- the invention proposes a pyrotechnic fuse element for circuits, which is provided with a plurality of current conductors, each of which has a separating section in which the relevant current conductor can be cut, and a pyrotechnically operable separating device with a carrier part, which carries a plurality of separating elements for severing the separating sections of the current conductors and can be moved towards the current conductors as a result of the ignition of a pyrotechnic charge, a separating element being assigned to each current conductor.
- the pyrotechnic fuse element has a plurality of current conductors, each of which is provided with a separating section, on which a separating element, which may be a cutting element, for example, acts. All separating elements are arranged on a common carrier part which, due to the ignition of the pyrotechnic charge, can be moved towards the current conductors in order to drive the separating elements through the separating sections of the current conductors.
- the invention creates the possibility of several electrical current conductors through the action of a single pyrotechnic charge.
- a corresponding structural design of the pyrotechnic fuse element and in particular through a corresponding design of the separating device or the separating elements of the separating device, it is also possible to cut the current conductors at the same time or at different times.
- the simultaneous cutting of all current conductors is achieved in that the distance between the separating sections from the respectively assigned separating elements is the same. If the current conductors are to be severed at different times, this is expediently achieved in that the distances between the current conductors or the separating sections of the current conductors are different in size from the respectively assigned separating elements.
- the separating elements of the separating device are designed as a one-piece separating tool.
- a one-piece cutting tool for example, an angled or stepped front edge with current conductor separating sections arranged at the same height can be used to ensure a temporally staggered cutting of the current conductors.
- the current conductors are formed in one piece in the area of their separating sections and have a cross-sectional area that is smaller than in the area outside their separating sections.
- the reduction in cross-section in the region of the separating sections is expediently to be chosen such that there are no significant voltage drops.
- the cross-sectional reduction has an advantageous effect on the separating forces to be applied, which are reduced in comparison to the case in which the current conductors have to be separated over their entire cross-sectional area.
- a comparative comparison can thus also be made for severing several current conductors, as provided in the pyrotechnic fuse element according to the invention. wise small-sized pyrotechnic charge can be used.
- the separating elements or the entire separating device are made of an electrically insulating material.
- the separating device and in particular its separating elements are made of plastic.
- the separating sections of the current conductors are designed as recesses made in their outer surfaces, in particular in the form of grooves. These depressions are expediently arranged in the side sections of the outer surfaces of the current conductors facing the separating elements. In this way, the mutually opposite flanks of the depressions serve as guides for the separating elements respectively assigned to the separating sections as they move towards the separating sections and through the current conductors.
- the separating elements in their starting positions, from which they can be moved toward and through the current conductors as a result of the ignition of the pyrotechnic charge in order to cut through them are already immersed to different degrees in the depressions.
- cross sectional area is each
- each current conductor in the separating section is most preferably 5% to 15% and in particular 10% of the cross-sectional area of the current conductor outside the separating section.
- Each conductor is made in one piece, which avoids electrical contact zones, which can change with regard to their contact resistance due to temperature, manufacturing tolerances, moisture or corrosion.
- the manufacturing costs are significantly reduced compared to the known pyrotechnic security elements.
- the moving mass can be reduced, which enables lower material thicknesses and the use of inexpensive plastic materials.
- the size of the pyrotechnic fuse element is relatively small.
- the pyrotechnic security element has only a few individual parts.
- the pyrotechnic charge need only be designed to be low.
- FIG. 1 to 3 perspective representations or a sectional representation of a first exemplary embodiment of a pyrotechnic securing element with two current conductors and a one-piece separating tool for the temporally offset cutting of the two current conductors in the starting position and in the severing position,
- Fig. 4 to 6 are perspective representations or a sectional representation of a second exemplary embodiment of a pyrotechnic fuse element with three current conductors and a three-part separating tool for separating the current conductors at different times in the initial state and in the severed state and
- FIGS. 7 to 10 to illustrate the structural design of the current conductors used in the pyrotechnic fuse elements according to the above two exemplary embodiments with a cross-sectional reduction in the separating section.
- the pyrotechnic securing element 10 according to the first exemplary embodiment has a housing 12, which is only partially indicated by dashed lines in the figures and is made of, in particular, non-conductive material, in which a cavity 14 is formed.
- Two electrical conductors 16 extend through the cavity 14.
- the (separating) sections 17 of the two current conductors 16 extending through the cavity 14 run essentially parallel to one another.
- a separating device 18 made of plastic is displaceably arranged in the cavity 14 and has a carrier part 20 with a one-part separating tool 22 which projects from it.
- the separating tool 22 is arranged on the side of the carrier part 20 facing the current conductors 16 and serves to sever both current conductors 16.
- In the housing 12 there is also a pyro-technical charge 24 with an electrical ignition element (not shown) and feed lines 26 .
- the current conductors 16 lie on the boundary wall 28 of the cavity 14 opposite the carrier part 20 and the separating tool 22, a receiving space 30 extending beneath them in the housing 12, into which the separating tool 22 is immersed after the current conductors 16 have been severed (see FIG the situation according to FIG. 2).
- each current conductor 16 is assigned a part 32 of the separating tool 22 (this part is referred to above as a separating element).
- the separating tool 22 has an inclined front edge 34, which ensures that when the current conductors 16 are arranged at the same height, the one (referred to FIG. 3 the left one) is cut rather than the other one (based on Fig. 3 the right one).
- FIGS. 4 to 6 A second exemplary embodiment of a pyrotechnic security element 10 is described below with reference to FIGS. 4 to 6 described.
- the individual parts of the securing element 10 ' which comprise the parts of the securing element 10 according to FIGS. 1 to 3 correspond to the same reference numerals, but used simply deleted.
- the difference between the pyrotechnic securing element 10 'and the securing element 10 according to FIGS. 1 to 3 consists on the one hand in that three current conductors 16 'can be separated at different times with the securing element 10', and on the other hand in that the separating tool 22 'is constructed in three parts, that is to say has three separating elements 32' which are integrally connected to the carrier part 20 '.
- the three current conductors 16 ' are arranged symmetrically offset in the housing 12' by 120 ° from each other.
- the sections 17 'of the current conductors 16' extend in each case rotated by 120 ° to one another.
- the distances between the front edges 34 'of the separating elements 32' are spaced differently apart from the separating sections 17 'of the current conductors 16' arranged at a common height.
- FIGS. 7 to 10 pyrotechnic Fuse element 50 explained.
- FIGS. 7 to 10 a pyrotechnic element with only one current conductor is shown.
- the figures 7 and 8 are longitudinal sections through the pyrotechnic fuse element 50 in its initial state with the current conductor not yet severed, while the FIGS. 9 and 10 show longitudinal sections of the pyrotechnic fuse element 50 when the charge is ignited, that is to say when the conductor is severed.
- the securing element 50 has a housing 52 made of, in particular, electrically non-conductive material, in which a cavity 54 is formed.
- the electrical current conductor 56 extends through the cavity 54 and is led out of the housing 52 on both sides.
- the circuit to be protected can be connected to the led out ends of the current conductor 56.
- a pyrotechnically operated separating device 58 which has a plastic piston 60.
- the plastic piston 60 carries on its end facing the current conductor 56 a separating element 62 in the form of a plastic sword, which is preferably connected in one piece to the plastic piston 60.
- On the end face of the plastic piston 60 facing away from the separating element 62 there is a pyrotechnic charge 64 in the housing 52 with an ignition element (not shown) which can be ignited electrically via electrical supply lines 66.
- the separating element 62 is inserted with its front end into a recess 68 of the current conductor 56 immersed.
- This recess 68 which in the case of the exemplary embodiment is a groove which is rectangular in cross section and extends over the entire width of the current conductor 56, represents the separating section 70 (in FIGS. 1 to 6 with 17 or 17 ') of the current conductor 56, in the area of which the current conductor 56 can be severed by means of the separating device 58.
- the depression 68 is introduced into the part 72 of the outer surface of the current conductor 56 facing the separating device 58.
- the separating element 62 is advanced through the separating section 70 of the current conductor 56 when the securing element 50 is triggered, into the receiving space 74.
- this receiving space 74 also serves to receive that part 76 of the current conductor 56, within its separating section 70, which is separated by the separating element 62. To a certain extent, the separating element 62 thus stamps the part 76 out of the separating section 70 of the current conductor 56.
- the pyrotechnic fuse element 50 has been explained above using an example in which the current conductor 56 has a separating section 70 of reduced cross section.
- the current conductor 56 could also have several, e.g. be provided with two separating sections, the separating element 62 then separating the middle part of the current conductor 56 between the two separating sections.
Landscapes
- Fuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19616994 | 1996-04-27 | ||
DE19616994A DE19616994A1 (en) | 1996-04-27 | 1996-04-27 | Pyrotechnic fuse element for circuits |
PCT/EP1997/002129 WO1997041583A1 (en) | 1996-04-27 | 1997-04-25 | Pyrotechnic circuit-breaking element for electric circuits |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0895646A1 true EP0895646A1 (en) | 1999-02-10 |
EP0895646B1 EP0895646B1 (en) | 1999-12-01 |
Family
ID=7792707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97922911A Expired - Lifetime EP0895646B1 (en) | 1996-04-27 | 1997-04-25 | Pyrotechnic circuit-breaking element for electric circuits |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0895646B1 (en) |
DE (2) | DE19616994A1 (en) |
WO (1) | WO1997041583A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4033510A4 (en) * | 2020-12-11 | 2022-08-03 | Xi' An Sinofuse Electric Co., Ltd. | Mechanical breaking and fusing combined multi-fracture excitation fuse |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9901932D0 (en) * | 1999-05-26 | 1999-05-26 | Cassiopeja Ab | Device for protecting a vehicle against fire |
DE502004005631D1 (en) * | 2003-02-04 | 2008-01-17 | Delphi Tech Inc | Pyromechanical separator |
DE10337958A1 (en) * | 2003-02-04 | 2004-08-12 | Dynamit Nobel Ais Gmbh Automotive Ignition Systems | Pyromechanical separation element, e.g. for interrupting current feeds in on-board electrical systems in accidents, has chisel that cuts conductor constriction forming bent tongue and clamps tongue |
DE102004010071A1 (en) * | 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 |
EP1464544B1 (en) | 2003-04-03 | 2010-09-15 | Delphi Technologies, Inc. | Housing with a busbar for a separation device |
DE102004011863A1 (en) * | 2003-04-03 | 2004-10-14 | Dynamit Nobel Ais Gmbh Automotive Ignition Systems | Housing with conductor rail for a separation system |
DE102004016884A1 (en) * | 2003-06-26 | 2005-01-13 | Dynamit Nobel Ais Gmbh Automotive Ignition Systems | Chisel for a pyromechanical separator |
EP1492139B1 (en) * | 2003-06-26 | 2016-01-06 | Autoliv Development AB | Chisel for pyromechanical separator |
EP2187417A1 (en) * | 2008-11-14 | 2010-05-19 | Delphi Technologies, Inc. | Pyromechanical disconnecting device |
DE102013009544A1 (en) | 2013-06-04 | 2014-12-04 | Erich Matouschek | Alarm-triggering burglar alarm |
EP2704117A2 (en) | 2012-08-28 | 2014-03-05 | Erich Matouschek | Device for triggering an alarm and anti-intrusion device |
DE102012221664B4 (en) * | 2012-09-25 | 2022-04-21 | Te Connectivity Germany Gmbh | short-circuit switch |
FR3017240B1 (en) * | 2014-02-04 | 2016-01-29 | Ncs Pyrotechnie Et Tech Sas | PYROTECHNIC CIRCUIT BREAKER |
DE102014106532B4 (en) | 2014-05-09 | 2017-06-22 | Erich Matouschek | Device for alarm triggering and burglar alarm |
DE102014222230A1 (en) * | 2014-10-30 | 2016-05-04 | Leoni Bordnetz-Systeme Gmbh | Pyrotechnic circuit breaker |
FR3071657B1 (en) * | 2017-09-26 | 2020-11-13 | Arianegroup Sas | PYROTECHNICAL CUTTING DEVICE |
FR3071659B1 (en) * | 2017-09-26 | 2019-10-11 | Arianegroup Sas | PYROTECHNIC CUTTING DEVICE |
FR3071658B1 (en) * | 2017-09-26 | 2019-10-18 | Arianegroup Sas | PYROTECHNIC DEVICE FOR OPENING A FIRST ELECTRIC CIRCUIT AND CLOSING A SECOND ELECTRIC CIRCUIT |
JP7437704B2 (en) * | 2018-10-01 | 2024-02-26 | パナソニックIpマネジメント株式会社 | Shutoff device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793501A (en) * | 1972-12-04 | 1974-02-19 | Ici America Inc | Explosive switch |
US4224487A (en) * | 1978-02-23 | 1980-09-23 | Simonsen Bent P | Fast acting explosive circuit interrupter |
US4417519A (en) * | 1981-06-04 | 1983-11-29 | Mcdonnell Douglas Corporation | Explosive switch |
JP2542704B2 (en) * | 1989-09-29 | 1996-10-09 | 工業技術院長 | High speed high current switch |
-
1996
- 1996-04-27 DE DE19616994A patent/DE19616994A1/en not_active Withdrawn
-
1997
- 1997-04-25 EP EP97922911A patent/EP0895646B1/en not_active Expired - Lifetime
- 1997-04-25 WO PCT/EP1997/002129 patent/WO1997041583A1/en active IP Right Grant
- 1997-04-25 DE DE59700801T patent/DE59700801D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9741583A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4033510A4 (en) * | 2020-12-11 | 2022-08-03 | Xi' An Sinofuse Electric Co., Ltd. | Mechanical breaking and fusing combined multi-fracture excitation fuse |
US11784021B2 (en) | 2020-12-11 | 2023-10-10 | Xi' An Sinofuse Electric Co., Ltd. | Mechanical breaking and fusing combined multi-fracture excitation fuse |
Also Published As
Publication number | Publication date |
---|---|
WO1997041583A1 (en) | 1997-11-06 |
DE19616994A1 (en) | 1997-10-30 |
DE59700801D1 (en) | 2000-01-05 |
EP0895646B1 (en) | 1999-12-01 |
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