EP1256776B1 - Elément d'ignition pyrotechnique sur un plaquette de circuiterie, à travers laquelle il est relie a un component élèctronique d'ignition - Google Patents

Elément d'ignition pyrotechnique sur un plaquette de circuiterie, à travers laquelle il est relie a un component élèctronique d'ignition Download PDF

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Publication number
EP1256776B1
EP1256776B1 EP02009852A EP02009852A EP1256776B1 EP 1256776 B1 EP1256776 B1 EP 1256776B1 EP 02009852 A EP02009852 A EP 02009852A EP 02009852 A EP02009852 A EP 02009852A EP 1256776 B1 EP1256776 B1 EP 1256776B1
Authority
EP
European Patent Office
Prior art keywords
ignition element
ignition
circuit carrier
carrier body
assembly
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.)
Expired - Lifetime
Application number
EP02009852A
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German (de)
English (en)
Other versions
EP1256776A1 (fr
Inventor
Thomas Görnig
Holger Wulff
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.)
Conti Temic Microelectronic GmbH
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Conti Temic Microelectronic GmbH
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Filing date
Publication date
Application filed by Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Publication of EP1256776A1 publication Critical patent/EP1256776A1/fr
Application granted granted Critical
Publication of EP1256776B1 publication Critical patent/EP1256776B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F42B3/121—Initiators with incorporated integrated circuit

Definitions

  • the invention relates to an ignition element for pyrotechnic active compositions on a circuit carrier assembly with a Zündelektronikbauou according to the preamble of claim 1, as used in particular for the release of gas generators of occupant protection devices in motor vehicles.
  • Ignition elements for pyrotechnic active materials have an ignitable by the application of an electrical voltage wire, which is arranged on a circuit carrier assembly, which in turn also has a Zündelektronikbauner for providing the ignition energy and for communication with a data bus, such as.
  • the DE 44 35 319 A1, DE 196 10 799 C1 or WO 97/21067 can be found.
  • an ignitable layer is increasingly being used, which has hitherto always been deposited on the circuit carrier arrangement, as can be seen from EP 0 555 651 B1 or DE 196 29 104 C1.
  • DE 199 40 201 C1 proposes for further integration to use the surface of a component, preferably of the ignition capacitor, as circuit carrier and to achieve an extremely compact design on this surface by depositing conductor tracks and applying the further components including an ignition layer.
  • ignition devices are to be taken with a structural separation of pyrotechnics and electronics range, for example from DE 40 02 088 C1 or DE 198 36 280 C1, in which a protective wall is provided between pyrotechnic and ignition area, via electrical connections between the two areas.
  • the electronic module can indeed be well protected and, if necessary, also be manufactured independently of the pyrotechnic sector, however, the functionality is not completely tested by the manufacturer of the electronic module, since the ignition bridge must indeed be arranged in the pyrotechnic range.
  • the object of the invention is to introduce an ignition element, which is easy to manufacture and assemble and manufacturing separation of pyrotechnics and electronics allows, without having to sacrifice a complete functional check.
  • This object is solved by the features of claim 1.
  • Advantageous developments can be found in the dependent claims.
  • the basic idea is to use a carrier body separate from the circuit carrier arrangement for the ignition element and not to arrange the ignition element directly on the circuit carrier arrangement.
  • the carrier body of the ignition element is made in one piece from a non-conductive, heat-resistant and poorly heat-conducting material, for example glass or ceramic.
  • this carrier body can be aligned and integrated by its dimensions and its electrical contacts to the assembly and electrical contacting machines in the production of Zündelektronikbauner on the circuit carrier assembly, so as a very normal component to be mounted on the circuit carrier assembly.
  • the pyrotechnically effective electrical ignition layer itself is still safe safety, as long as it does not come together with the pyrotechnic active material.
  • the circuit carrier assembly can be so but completely equipped including the ignition element in normal electrical assembly halls, transported as a finished assembly without special security measures and stored and so are checked at any time already fully on electrical functionality.
  • the manufacturer of the finished circuit carrier assembly can in turn acquire the ignition element as a vendor part of a pyrotechnics specialist and does not need to have any special devices for their application or assembly ready.
  • the ignition element is self-trading and exchangeable unit, which leads to corresponding rationalization and specialization effects.
  • the carrier body is in turn protects the circuit carrier assembly from the effects of the burnup of the pyrotechnic active mass.
  • the carrier body also allows a variable mounting orientation of the circuit carrier assembly with respect to the pyrotechnic active mass, since the ignition bridge can be arranged on the support body not only on the top, but also on the side surface and so a perpendicular from the pyrotechnic active mass away arrangement of the circuit carrier assembly is possible, without the need for elaborate transducer or contacts for the ignition element would be required.
  • FIG. 1 shows a sectional view through a particularly preferred embodiment of the ignition device, as it is to be used as an igniter for a gas generator of an occupant protection device, for example.
  • An airbag in a motor vehicle.
  • the ignition device consists of an ignition element 10 with a Zünd Portugaln GmbH 1, which is arranged on a separate carrier body 11 and connected via contacts 12 with a circuit carrier assembly 2, which in turn also receives the ignition electronics module 6.
  • the carrier body 11 can be selected to be largely free from the constraints otherwise required for circuit carrier arrangements from a pressure-resistant, heat-resistant as well as hardly thermally conductive material, for example from ceramic.
  • the carrier body 11 can be dimensioned without significant cost increases in its dimensions to the components used for the other components on the circuit carrier assembly, In particular, the Zündelektronikbauè 6 adapted and processed in one operation or by a placement machine.
  • FIG. 2 shows, as an example, such an ignition element 10 with a carrier body 11 corresponding to the SMD standard design 1206, metallizations 13, and laterally peripheral contacts 12.
  • the carrier body 11 basically has metallizations 13 which on the one hand form the contact surfaces for the ignition bridge layer 1 and on the other hand lead to the contacts 12 to the circuit carrier arrangement 2 or form these contacts themselves, i. the contacts 12 are special formations of the metallizations 13, if necessary with additional reflow solder coating.
  • the contacts 12 of the ignition element 10 are designed so that they also contacted together with the contacts of the ignition electronics module 6 in one operation on the circuit carrier assembly 2, here SMD reflow soldered in this example.
  • FIG. 3 shows that the ignition bridge layer 1 can be arranged on a side surface 11s of the carrier body with respect to the contacts 12 on the underside 11u, or the ignition element 10 can be mounted correspondingly aligned.
  • the particularly preferred longitudinal alignment is possible, as shown in Figure 1, in which the carrier body 11 of the ignition element 10 is disposed at one, here the upper end of the circuit carrier assembly 2.
  • Circuit carrier assembly 2 and igniter 10 touch only at this end the pyrotechnic active mass 3 and are otherwise already surrounded by a pressure-elastic and shock-absorbing sheath 4.
  • the ignition electronics module 6 is arranged on the other end of the circuit carrier assembly 2 and thus largely alone due to the alignment and spacing are protected against the effects of burning the pyrotechnic active mass 3.
  • the pyrotechnic region A of the ignition device is separated from the electronics region B, wherein the separation is formed either by a protective wall 7c (see Fig. 4) or as a particularly preferred embodiment directly from a sheath 5 of the electronics area B with a corresponding pressure and heat resistant material, as shown in Fig. 1.
  • the carrier assembly 2 is also at least partially enveloped in the pyrotechnic region A by a pressure-absorbing material 4.
  • This pressure-absorbing material 4 for example a softglobe top, protects by its plastic or elastic deformability both the part 2a of the carrier arrangement 2 located in the pyrotechnic region A.
  • a subdivision is divided by a two-part cladding of the carrier arrangement into pyrotechnic region A and electronics region B.
  • the carrier assembly 2 in Figure 1 also has as a special feature at least one separation point 23 for separating the located in the pyrotechnic portion 2a of the carrier assembly 2 of the remaining carrier assembly 2b after the ignition of the pyrotechnic active mass 3, wherein the separation points 23 are preferably dimensioned so that they only when exceeding a predetermined thermal and / or mechanical limit load during the burning of the pyrotechnic active mass 3, the carrier assembly 2 separate.
  • the separation that has taken place can also be detected on the remaining and interrupted line ends on the carrier arrangement 2. The separation ensures that no or at least no forces exceeding the limit load are forwarded via the carrier arrangement 2 to the electronic module 6.
  • the carrier assembly 2 may be configured, for example, of ceramic material with corresponding metallic deposits of conductor track structures and contact zones and the separation point 23 there be formed as a predetermined breaking point, as shown in Figure 1.
  • the electronic assembly 6 consists of electronic components for controlling the ignition device via an energy and data bus to which the ignition device is connected via the contacts 8, a protection circuit against interference on the data bus and an ignition energy storage, in particular a firing capacitor and optionally other components. It is crucial that the electronic assembly even after the separation of the pyrotechnic part 2a of the support assembly with the ignition element 10 still continue to perform its other functions, ie in particular the self-diagnosis and data bus communication, but at least not hindered the data exchange on the bus system.
  • the circuit carrier assembly 2 may also consist of two separate parts 2a and 2b, which are connected for example by a solder connection before the ignition of the pyrotechnic active mass 3 and due to the heat melts during burning.
  • the Lotstelle (s) as an alternative embodiment of the separation point (s) 23 is / (are) to be dimensioned so that it meets both mechanical and thermal requirements in motor vehicle operation and can also conduct the ignition to the ignition bridge 1, without melting , However, since the released during combustion of the pyrotechnic active mass 3 amount of heat significantly above these loads, the Lotstelle can be dimensioned with appropriate security, especially since a melting of Lotstelle sufficient to forward the transfer of forces from the pyrotechnic area A in the electronics area B via the circuit carrier assembly 2 prevent.
  • the circuit carrier arrangement 2 in FIG. 1 is also preferably at least partially enveloped in the pyrotechnic pool A by a pressure-absorbing material 4, which is softer than the material of the protective wall 7c or the enclosure 5 in the electronics area B.
  • This pressure-absorbing material 4 for example a softglobtop, protects due to its plastic or elastic deformability, both the part 2a of the carrier arrangement 2 located in the pyrotechnic region A and the protective wall 7c or the envelope 5, whose pressure resistance is therefore dimensioned smaller or the total safety can be further increased.
  • This pressure-absorbing material 4 is elastic so far that at least when exceeding the limit load on the pyrotechnic part 2a of the circuit carrier assembly 2, the separation points are severed.
  • FIGS. 4 and 5 now show an alternative form of assembly of the ignition device with an ignition element 10 with a separate carrier body 11, which is arranged here on a circuit carrier arrangement 2 extending transversely thereto, wherein the ignition electronic module 6 on the circuit carrier arrangement 2 is additionally protected by a protective wall 7c.
  • the ignition element 10 may again be enveloped with a recess of the region of the ignitable layer 1 with a pressure-absorbing material 4.

Claims (9)

  1. Elément d'amorçage (10) pour des masses actives pyrotechniques (3), l'élément d'amorçage (10) étant disposé sur un dispositif de support de circuit (2) et étant connecté à un sous-ensemble électronique d'amorçage (6) via le dispositif de support de circuit (2), caractérisé en ce que
    l'élément d'amorçage (10) présente un corps support (11) séparé du dispositif de support de circuit (2) et qui présente des moyens de contact (12) pour l'établissement de contact électrique de l'élément d'amorçage (10) avec le dispositif de support de circuit (2).
  2. Elément d'amorçage selon la revendication 1, caractérisé en ce que le sous-ensemble électronique d'amorçage (6) se compose de composants standards avec des dimensions standardisées pour les automates de pose de pièces constitutives et en ce que le corps support (11) de l'élément d'amorçage (10) présente également ces dimensions standardisées et peut être placé sur le dispositif de support de circuit (2) par les mêmes automates de pose de pièces constitutives.
  3. Elément d'amorçage selon la revendication 1 ou 2, caractérisé en ce que les moyens de contact (12) de l'élément d'amorçage (10) sont constitués de sorte qu'ils peuvent être mis en contact sur le dispositif de support de circuit (2) en même temps que les moyens de contact du sous-ensemble électronique d'amorçage (6) en une passe de travail.
  4. Elément d'amorçage selon une des revendications précédentes, caractérisé en ce que les moyens de contact (12) du corps support (11) peuvent faire l'objet d'un brasage SMD.
  5. Elément d'amorçage selon une des revendications précédentes, caractérisé en ce que l'élément d'amorçage (10) présente une couche (1) pouvant être amorcée électriquement, précipitée sur le corps support séparé.
  6. Elément d'amorçage selon une des revendications précédentes, caractérisé en ce que le corps support (11) de l'élément d'amorçage est d'une seule pièce, réalisé à partir d'un matériau non conducteur, résistant à la chaleur et mauvais conducteur de la chaleur.
  7. Elément d'amorçage selon la revendication 5, caractérisé en ce que le corps support (11) de l'élément d'amorçage est en matériau céramique ou en verre.
  8. Elément d'amorçage selon une des revendications précédentes, caractérisé en ce que la couche (1) pouvant être amorcée est, par rapport aux moyens de contact (12) sur la face inférieure du corps support (11u), disposée sur une face latérale (11s) du corps support.
  9. Elément d'amorçage selon une des revendications précédentes, caractérisé en ce que le corps support (11) de l'élément d'amorçage est disposé sur une extrémité du dispositif de support de circuit (2) et en ce que la face latérale (11s) munie de l'élément d'amorçage est orientée selon cette extrémité, touche avec cette extrémité la masse active pyrotechnique (3) et en ce que le sous-ensemble électronique d'amorçage (6) est disposé sur l'autre extrémité du dispositif de support de circuit (2) à distance de l'élément d'amorçage (10).
EP02009852A 2001-05-12 2002-05-02 Elément d'ignition pyrotechnique sur un plaquette de circuiterie, à travers laquelle il est relie a un component élèctronique d'ignition Expired - Lifetime EP1256776B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10123285A DE10123285A1 (de) 2001-05-12 2001-05-12 Zündelement für pyrotechnische Wirkmassen auf einer Schaltungsträgeranordnung mit einer Zündelektronikbaugruppe
DE10123285 2001-05-12

Publications (2)

Publication Number Publication Date
EP1256776A1 EP1256776A1 (fr) 2002-11-13
EP1256776B1 true EP1256776B1 (fr) 2006-01-18

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EP02009852A Expired - Lifetime EP1256776B1 (fr) 2001-05-12 2002-05-02 Elément d'ignition pyrotechnique sur un plaquette de circuiterie, à travers laquelle il est relie a un component élèctronique d'ignition

Country Status (3)

Country Link
US (1) US6644199B2 (fr)
EP (1) EP1256776B1 (fr)
DE (2) DE10123285A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6820557B2 (en) * 2002-01-25 2004-11-23 Daicel Chemical Industries, Ltd. Igniter for air bag system
JP3803636B2 (ja) * 2002-12-26 2006-08-02 本田技研工業株式会社 バス接続用点火装置
JP4653718B2 (ja) * 2006-10-26 2011-03-16 日本化薬株式会社 スクイブならびにエアバッグ用ガス発生装置およびシートベルトプリテンショナー用ガス発生装置
US8429352B2 (en) * 2007-06-08 2013-04-23 Sandisk Technologies Inc. Method and system for memory block flushing
CA2741091C (fr) * 2008-10-24 2017-01-17 Battelle Memorial Institute Systeme de detonateur electronique
DE102019101236A1 (de) * 2019-01-17 2020-07-23 Liebherr-Components Biberach Gmbh Ansteuervorrichtung zum Auslösen zumindest einer Pyrosicherung sowie Energiespeicher mit einer solchen Pyrosicherung
CN110411285B (zh) * 2019-07-19 2022-01-11 南京理工大学 集成单触发开关的爆炸箔超压芯片及其起爆装置

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Also Published As

Publication number Publication date
EP1256776A1 (fr) 2002-11-13
US6644199B2 (en) 2003-11-11
DE10123285A1 (de) 2002-11-14
DE50205621D1 (de) 2006-04-06
US20020166472A1 (en) 2002-11-14

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