EP3101677B1 - Pyrotechnische vorrichtung für elektronischen schaltkreis - Google Patents
Pyrotechnische vorrichtung für elektronischen schaltkreis Download PDFInfo
- Publication number
- EP3101677B1 EP3101677B1 EP16171457.1A EP16171457A EP3101677B1 EP 3101677 B1 EP3101677 B1 EP 3101677B1 EP 16171457 A EP16171457 A EP 16171457A EP 3101677 B1 EP3101677 B1 EP 3101677B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pyrotechnic
- circuit
- electronic circuit
- component
- conductors
- 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.)
- Not-in-force
Links
- 239000000463 material Substances 0.000 claims description 47
- 239000004020 conductor Substances 0.000 claims description 30
- 238000004880 explosion Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- JSOGDEOQBIUNTR-UHFFFAOYSA-N 2-(azidomethyl)oxirane Chemical compound [N-]=[N+]=NCC1CO1 JSOGDEOQBIUNTR-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229940082150 encore Drugs 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
Definitions
- the present description generally relates to electronic systems and, more particularly, to a component or electronic power circuit equipped with a pyrotechnic safety device.
- power components power transistors, diodes, thyristors, triacs, etc. having automatic or controlled switching functions are used. These components are found, for example, in the control inverters of an engine (typically in an electric vehicle), power converters, as well as in power circuit breakers such as circuit breakers, static contactors, etc.
- the document FR-A-3005782 discloses a disconnector for a DC power source, based on an opening of a pyrotechnic trigger contact.
- the explosion of the pyrotechnic element is controlled by an external control and the gases produced by the explosion spread in a dilation chamber and cause a movable blade that breaks the electrical conductor to cut.
- the document EP-A-1709335 as well as the document DE 199 60 597 A1 describe a pyrotechnic microsystem in which a pyrotechnic material is deposited on a substrate.
- the explosion of the pyrotechnic material generates a quantity of gas causing actuation.
- the initiation of the pyrotechnic material is caused by a heating resistive track or wire in which is triggered by a control unit, the flow of a current.
- EP-A-1344744 describes a pyrotechnically actuated microvalve, based on the triggering of a pyrotechnic material deposited on an electrical resistance.
- an external control element causes the triggering of the pyrotechnic charge.
- One embodiment overcomes all or part of the disadvantages of the usual power electronic circuits.
- One embodiment provides a solution that avoids a short-circuit failure of a power component.
- One embodiment provides an improved pyrotechnic solution.
- an embodiment provides a pyrotechnic device according to claim 1.
- the explosion of the pyrotechnic material causes the rupture of all conductors electrically in parallel.
- the device further comprises at least one rigid element capable of being propelled towards the conductor (s) by the pyrotechnic gases.
- the thickness of the pyrotechnic material is between 10 and 100 micrometers.
- the pyrotechnic material is electrically insulating.
- the device further comprises a housing covering, at least partially, the electronic circuit and the pyrotechnic device.
- the housing is formed of an encapsulating material covering the circuit and the pyrotechnic device and at least partially embedding the conductor or conductors.
- the housing is hollow.
- the electronic circuit integrates a power switch.
- One embodiment provides a method for producing a pyrotechnic device, wherein a material pyrotechnic is deposited in the liquid state on the electronic circuit.
- the terms “approximately”, “substantially” and “of the order of” mean within 10%, preferably within 5%.
- FIGS. 1A and 1B represent, respectively in perspective and in section, and very schematically, an embodiment of a pyrotechnic safety device power circuit.
- a power component 2 is, for example, carried by an electronic card 1 (for example a printed circuit board - PCB).
- the power component 2 for example, a diode, a transistor, a thyristor, a triac, etc. is made in a semiconductor substrate (for example made of silicon) and comprises electrical contacts 22 intended to receive conductors, for example wires 32, for electrical connection to other elements (not shown) of the circuit or of the electronic system.
- a peculiarity of this pyrotechnic security is that the explosion is initiated by the failure itself without the need for external control.
- the pyrotechnic safety device comprises a layer of pyrotechnic material 42 deposited on the component 2.
- the function of the pyrotechnic material is to cause the rupture of at least one conductor 32, under the effect of the gases produced during its explosion. If several conductors are electrically in parallel, the pyrotechnic material causes all these conductors to break in order to guarantee a break in the electrical connection.
- FIGS. 2A and 2B are partial sectional views illustrating the triggering of the pyrotechnic security according to an embodiment of a power component.
- Figures 2A and 2B represent an enlargement of the Figure 1B at the active (semiconductor) region of the power component 2 made in the semiconductor substrate.
- the Figure 2A illustrates the triggering of pyrotechnic safety and the Figure 2B illustrates its action on one of the conductive wires 32.
- the current generally from about ten amperes to a few hundred amperes according to the circuits, which circulates in the active zone 24 of the component does not generate a rise in temperature likely to explode the pyrotechnic material.
- the current supplied by the conductor (s) 32 and flowing in the component tends to focus on the fault area because its resistance is lower than in the rest of the component. This locally generates an increase in the current which causes the melting of the materials (metal, silicon, etc.) of this zone, decreasing the local resistance and causing a runaway effect.
- the hot spot that is created and the local melting of the materials cause the triggering of the security by the explosion of the pyrotechnic material.
- the gases caused by this explosion then break the conducting wire 32 ( Figure 2B ) or the parallel conductors.
- the security acts on (and destroys) its own trigger element (or the conductive son 32). Therefore, this guarantees an opening of the electrical circuit even if, at component 2, the failure has resulted in a short circuit.
- Mechanical failure of the conductor 32 or electrically parallel conductors ensures that the failure results in an open circuit. In the case of series conductors, simply break the serial connection.
- the pyrotechnic material 42 is preferably present at least vertically above the conductors 32 to be broken by the pyrotechnic action. This improves its effect.
- the assembly is preferably in a closed chamber as will be seen later in connection with the figure 4 .
- the integration of the pyrotechnic material is carried out at the end of manufacture of the component or the circuit, after the soldering of the conductors 32 on the contacts 22.
- the material is preferably deposited in liquid or pasty form so as to be distributed on the component and to be inserted vertically above the conductor (s) 32.
- the pyrotechnic material is for example deposited with a thickness of a few micrometers.
- a nitrocellulose varnish can be used which ignites at a temperature of the order of 160 to 170 ° C., provided that this is compatible with the subsequent manufacturing steps (for example, in which case cold welding for subsequent steps) and in particular the encapsulation of the component.
- the material is a polymer of the family of glycidyl azide polymers (Glycidyl azide polymers - GAPs) whose ignition temperature is about 573 ° C.
- the figure 3 is a schematic view from above of another embodiment of a pyrotechnic safety power component.
- the pyrotechnic safety device 4 comprises, in addition to the layer 42 of pyrotechnic material, a rigid intermediate element 44 between the pyrotechnic material 42 and the conductor or conductors 32.
- element 44 acts as a projectile during the explosion of the pyrotechnic material 42 and facilitates the breakage of the conductors.
- the element 44 is disposed on the pyrotechnic material, for example glued (which is easy if the pyrotechnic material is deposited in the form of a liquid varnish), and is located under the conductor or drivers to be sectioned.
- Element 44 may be in one piece as shown in FIG. figure 3 or consisting of several projectiles.
- the element 44 is insulating to avoid any risk of creating a short circuit between conductors 32 in normal operation.
- the figure 4 is a schematic sectional view of yet another embodiment of a pyrotechnic safety power component, illustrating different variants.
- This embodiment includes a housing 6 covering the electronic circuit and in particular the power component 2.
- the component 2 is connected, by one or more conductive tracks 34, for example made of copper, to a connecting lug opening out of the housing 6.
- the track 34 represents a ground plane of the power component or backside electrode.
- an upper contact of the component 2 is connected, by a conductive wire 32, to a copper track 36 of the circuit 1, connected to another connecting lug 37.
- the pyrotechnic material 42 is deposited only on the component and on the copper track 34 to surround the lug 35 (and pass below the lug 35 if it has horizontal portions internal to the housing 6). Thus, during the activation of the pyrotechnic material 42, the tab 35 and the wire 32 are broken.
- the housing 6 is empty, at least in the vicinity of this element to allow projection.
- the housing is full.
- the component assembly 2, material 42 and wire 32 is embedded in encapsulating resin (for example epoxy resin).
- an intermediate element 44 has no effect.
- the fact that the wire 32 is embedded in the resin that, during a pyrotechnic trip destroying the housing, the wire 32 embedded in the resin is torn off.
- the tab 35 in order to facilitate the breakage of the tab 35, it includes a weakened zone 352, for example an indentation. This notch must however be such that the lug 35 retains a section adapted to the flow of normal operating current. Where appropriate, the passage of the housing 6 by the lug 35 is a rigid connection. This helps to facilitate breakage during the pyrotechnic effect.
- the pyrotechnic material 42 extends over the entire circuit 1 inside the housing 6.
- the figure 5 is a schematic sectional view, yet another embodiment of a pyrotechnic safety power component.
- two circuits 1 and 1 ' are connected by connecting balls (BGA).
- BGA connecting balls
- the gap between the balls and, preferably, between the circuits 1 and 1 ', is filled with pyrotechnic material.
- this material serves to encapsulate the component while providing protection.
- An advantage of the embodiments that have been described is that the security is particularly fast to be triggered.
- Another advantage is that the absence of a control circuit ensures reliable operation. Indeed, since the trigger is exclusively thermal, no electronic failure can prevent this trigger.
- Another advantage is that the safety device is particularly easy to achieve.
- the thickness of the pyrotechnic material is between 10 and 100 micrometers.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fuses (AREA)
- Air Bags (AREA)
Claims (11)
- Eine pyrotechnische Einrichtung (4) die Folgendes aufweist:einen oder eine Vielzahl von Leitern (32); undwenigstens eine Schicht (42) eines pyrotechnischen Materials, das auf der gesamten oder einem Teil einer elektronischen Schaltung (2) abgelagert bzw. abgeschieden ist, dadurch gekennzeichnet, dass die Explosion des pyrotechnischen Materials durch einen heißen Punkt auf der Ebene des Leiters (der Leiter) aufgrund eines Versagens der Schaltung ausgelöst wird, wobei der pyrotechnische Effekt ein Unterbrechen des Leiters (der Leiter) bewirkt.
- Einrichtung nach Anspruch 1, die eine Vielzahl der Leiter elektrisch parallel aufweist; wobei die Explosion des pyrotechnischen Materials bewirkt, dass alle Leiter (32), die elektrisch parallel sind, unterbrochen werden.
- Einrichtung nach Anspruch 1 oder 2, die weiter wenigstens ein starres Element (44) aufweist, das durch die pyrotechnischen Gase in Richtung des Leiters (der Leiter) (32) getrieben werden kann.
- Einrichtung nach einem der Ansprüche 1 bis 3, wobei die Dicke des pyrotechnischen Materials (42) im Bereich von 10 bis 100 Mikrometern liegt.
- Einrichtung nach einem der Ansprüche 1 bis 4, wobei das pyrotechnische Material elektrisch isolierend ist.
- Eine elektronische Einrichtung, die Folgendes aufweist:eine elektronische Schaltung (2); unddie pyrotechnische Einrichtung (4) nach einem der Ansprüche 1 bis 5.
- Einrichtung nach Anspruch 6, die weiter ein Gehäuse (6) aufweist, das wenigstens teilweise die elektronische Schaltung (2) und die pyrotechnische Einrichtung (4) abdeckt.
- Einrichtung nach Anspruch 7, wobei das Gehäuse aus einem Einkapselungsmaterial gebildet ist, das die Schaltung und die pyrotechnische Einrichtung (4) abdeckt und wenigstens teilweise den Leiter (die Leiter) (32) einbettet.
- Einrichtung nach Anspruch 7, wobei das Gehäuse (6) hohl ist.
- Einrichtung nach einem der Ansprüche 6 bis 9, wobei die elektronische Schaltung einen Leistungsschalter integriert.
- Ein Verfahren zum Bilden der pyrotechnischen Einrichtung nach einem der Ansprüche 1 bis 5, wobei ein pyrotechnisches Material im flüssigen Zustand auf der elektronischen Schaltung abgelagert bzw. abgeschieden wird.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1555091A FR3037188A1 (fr) | 2015-06-04 | 2015-06-04 | Dispositif pyrotechnique pour circuit electronique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3101677A1 EP3101677A1 (de) | 2016-12-07 |
EP3101677B1 true EP3101677B1 (de) | 2017-11-15 |
Family
ID=54608616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16171457.1A Not-in-force EP3101677B1 (de) | 2015-06-04 | 2016-05-26 | Pyrotechnische vorrichtung für elektronischen schaltkreis |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160356587A1 (de) |
EP (1) | EP3101677B1 (de) |
JP (1) | JP2017022089A (de) |
FR (1) | FR3037188A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017111413A1 (de) | 2017-05-24 | 2018-11-29 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Selbstauslösende Sprengsicherung |
DE102017118416A1 (de) * | 2017-08-11 | 2019-02-14 | Ruag Ammotec Gmbh | Pyrotechnische Trenneinrichtung, System zum elektrischen Laden einer elektrischen Energiezelle, Mobilgerät und Ladegerät |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2873327A (en) * | 1956-04-19 | 1959-02-10 | Bernstein Elliot | Combined fuse and current limiting resistor |
US4101352A (en) * | 1971-02-08 | 1978-07-18 | The United States Of America As Represented By The Secretary Of The Navy | Deflagrative electronic component potting compound |
US3909567A (en) * | 1973-03-19 | 1975-09-30 | France Etat | Electrical relay containing a pyrotechnical charge and having no moving parts |
CH635461A5 (de) * | 1979-01-11 | 1983-03-31 | Bbc Brown Boveri & Cie | Starkstromschalter mit sprengausloesung. |
US5256899A (en) * | 1991-12-24 | 1993-10-26 | Xerox Corporation | Integrated circuit fuse link having an exothermic charge adjacent the fuse portion |
US5793275A (en) * | 1995-10-23 | 1998-08-11 | Iversen; Arthur H. | Exothermically assisted arc limiting fuses |
DE19960597A1 (de) * | 1999-12-16 | 2001-06-21 | Bosch Gmbh Robert | Sicherheitseinrichtung |
FR2828245B1 (fr) * | 2001-04-27 | 2005-11-11 | Poudres & Explosifs Ste Nale | Microactionneurs pyrotechniques pour microsystemes |
FR2836907B1 (fr) | 2002-03-11 | 2005-03-18 | Commissariat Energie Atomique | Microvanne a actionnement pyrotechnique |
FR2865508B1 (fr) * | 2004-01-27 | 2006-03-03 | Snpe Materiaux Energetiques | Microsysteme pyrotechnique et procede de fabrication d'un microsysteme. |
FR2957452B1 (fr) * | 2010-03-15 | 2012-08-31 | Snpe Materiaux Energetiques | Interrupteur electrique a actionnement pyrotechnique |
DE102011014343A1 (de) * | 2011-03-18 | 2012-09-20 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Sicherungsvorrichtung für eine Spannungsversorgung eines Kraftfahrzeugs |
FR3005782B1 (fr) | 2013-05-16 | 2016-10-14 | Commissariat Energie Atomique | Sectionneur pour source d'alimentation electrique continue de puissance |
RU2623420C1 (ru) * | 2013-11-19 | 2017-06-26 | Апстек Системс Юэсэй Ллс | Интеллектуальный досмотровый барьер |
US10416094B2 (en) * | 2016-03-31 | 2019-09-17 | Northeastern University | Characterization of dielectric slabs attached to the body using focused millimeter waves |
-
2015
- 2015-06-04 FR FR1555091A patent/FR3037188A1/fr active Pending
-
2016
- 2016-05-26 EP EP16171457.1A patent/EP3101677B1/de not_active Not-in-force
- 2016-06-02 US US15/172,030 patent/US20160356587A1/en not_active Abandoned
- 2016-06-03 JP JP2016111980A patent/JP2017022089A/ja not_active Withdrawn
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
FR3037188A1 (fr) | 2016-12-09 |
EP3101677A1 (de) | 2016-12-07 |
US20160356587A1 (en) | 2016-12-08 |
JP2017022089A (ja) | 2017-01-26 |
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