WO2011114045A1 - Interrupteur electrique a actionnement pyrotechnique - Google Patents
Interrupteur electrique a actionnement pyrotechnique Download PDFInfo
- Publication number
- WO2011114045A1 WO2011114045A1 PCT/FR2011/050494 FR2011050494W WO2011114045A1 WO 2011114045 A1 WO2011114045 A1 WO 2011114045A1 FR 2011050494 W FR2011050494 W FR 2011050494W WO 2011114045 A1 WO2011114045 A1 WO 2011114045A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- gas generator
- switch according
- breakable
- pyrotechnic
- Prior art date
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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/058—Containing a battery
Definitions
- the invention relates to an electric switch with pyrotechnic actuation forming for example circuit breaker and preferably using a gas microgenerator, known per se.
- the preferred field of application is that of electric vehicles requiring the incorporation of electric circuit breakers to ensure the safety of the vehicle and its occupants in case of malfunction of the electric battery and / or the associated electrical circuit, for example during an accident.
- the invention therefore aims primarily to protect the occupants of an electric automobile by setting the safety of the components of the power train.
- such a device can also be used in another field, aeronautical, space, maritime or other.
- the main power elements to be electrically protected are therefore, in the first place, the elements of the electric battery, then the powertrain, the kinetic energy recovery device (supercapacitors), the electronic conversion of the DC voltage into voltage alternative, the control system of the electric power supplied to the engine, etc.
- Document EP 1 502 683 discloses a pyrotechnic circuit breaker provided with a hollow piston, a gas generator facing the piston and an electrical conductor to be sectioned.
- the hollow piston inside which the combustion gases accumulate under pressure during the pyrotechnic trip moves and pushes another element provided with a kind of knife cutting the driver.
- This device is complex because it requires a large number of relatively expensive precision components to achieve.
- the assembly of these components involves the control of assembly and nesting operations with low mechanical tolerance, which makes it difficult to achieve high production rates.
- this device may have a poor seal leading to gas leaks at the time of establishment of the pyrotechnic pressure, which may compromise the proper operation of the circuit breaker.
- the invention overcomes all these difficulties. More particularly, the invention relates to an electric switch with pyrotechnic actuation comprising, in the same housing, a pyrotechnic trigger gas generator and a variable configuration chamber associated with said gas generator, characterized in that it further comprises a blade conductive constituent, before said pyrotechnic triggering, a bottom wall of said chamber, in that two ends of said blade are accessible outside the housing, in that this bottom wall comprises at least one breakable incision for electrically separating said accessible ends when the gases are emitted by said gas generator, in that a clearance space is defined on the other side of said gas generator with respect to said conductive blade, allowing an at least partially broken portion of said blade to engage in it when triggering said gas generator.
- the pyrotechnic gas generator is directly opposite the cutting blade which forms a wall of a chamber whose volume is called to vary upon release, leading to space at least a portion of said bottom wall formed by the blade.
- the housing is obtained by plastic overmolding.
- the clearance space defined on the other side of said gas generator is provided with negative clearance walls allowing the friction of the broken part of said blade throughout its travel inside said clearance space.
- the friction of the broken part of the blade on the edges of the clearance clearance allows to maintain the sealing of said variable configuration chamber during the entire displacement of the broken part of the blade.
- the combustion gases of a pyrotechnic trigger gas generator thus remain confined in said variable configuration chamber ensuring its pressurization.
- the circuit breaker thus obtained is of low mass and small footprint and is particularly well suited to mass production, robotic.
- This robotic production can indeed be organized in a very simple manner around an injection molding machine thus producing by plastic overmolding, the outer casing closing the gas generator and the blade.
- a movable sealing element is interposed between the gas generator and the conductive blade.
- this movable sealing element forms a sliding plug interposed in said variable configuration chamber between the gas generator and said sectionalable blade, before pyrotechnic triggering.
- This element helps to prevent the rupture of the blade leading to a gas leak causing depressurization.
- a depressurization could indeed induce the extinction of the pyrotechnic charge from the first moments of operation or could make insufficient the pressure applied to the blade, resulting in a non-free break and thus a partial or too slow electrical cut.
- the movable sealing element is a closed bellows, a mouthpiece of which is connected to an outlet of said gas generator.
- the gas remains confined in the bellows after pyrotechnic triggering and causes the expansion of the latter, this expansion coming to break said blade.
- combustion gas residues which may be conductive, come into contact with the broken ends of the blade. This results in better electrical insulation.
- FIG. 1 is an exploded perspective view of a first embodiment of a device according to the invention
- FIGS. 3A and 3B are simplified schematic views corresponding to the embodiment of FIGS. 1 and 2, to illustrate the operation;
- FIGS. 4A and 4B are views similar to FIGS. 3A, 3B, illustrating a variant of the same embodiment
- FIG. 5 is a sectional view of a second embodiment of a device according to the invention.
- FIGS. 6A and 6B are simplified schematic views corresponding to the embodiment of FIG. 5, to illustrate the operation
- FIGS. 7A and 7B are views similar to FIGS. 6A and 6B, illustrating a variant of the same embodiment
- FIGS. 8A and 8B are views similar to FIGS. 6A and 6B, illustrating a variant of the same embodiment
- FIGS. 9A and 9B are views similar to FIGS. 6A and 9B.
- FIGS. 10A and 10B are views similar to FIGS. 6A and 6B illustrating a variant of the same embodiment
- FIG. 11A and 11B are views similar to Figures 6A and 6B illustrating another embodiment
- FIG. 12A and 12B are views similar to Figures 11A and 11B illustrating a variant
- FIGS. 13A and 13B illustrate a third embodiment, in section, before and after tripping, respectively.
- an electric switch 11 forming a pyrotechnic actuator comprising a housing 13 and a pyrotechnic trigger gas generator 15 installed in said housing where a chamber is defined. 17 whose configuration varies when gases are emitted by said gas generator. In the example, as will be seen below, the volume of this chamber increases when the pressurized gases are emitted by the gas generator 15.
- a wall 19a of the chamber 17 is constituted by the conductive blade and more particularly by the middle part thereof.
- this wall 19a which forms the bottom wall of the chamber 17, opposite to the gas generator 15, comprises at least one breakable incision 22 (or any other pre-cut) for electrically separating said accessible ends 20a, 20b of the blade when the gases are emitted by the gas generator, that is to say when the volume of the chamber 17 increases sharply.
- a clearance space 21 is defined on the other side of the gas generator with respect to the conductive plate 19 forming the bottom wall of the chamber 17 before triggering. At least partially broken part of the blade, that is to say said bottom wall 19a can thus engage in the clearance space during the triggering of the gas generator 15.
- a breakable incision 22 is shaped to allow complete detachment of a portion of said blade (in this case the bottom wall 19a of the chamber 17) and its driving into said clearance space 21, under the action of these gases.
- two transverse parallel incisions 22 located in the vicinity of the limits of the chamber 17 have been made in the blade.
- the other two sides of the blade (in the longitudinal direction thereof) are in the vicinity of the two edges of the blade. opening of clearance space 21.
- FIGS. 1 and 2 which illustrate an easily automatable industrial embodiment, it can be seen that the gas generator 15 is contained in a generally cylindrical closed receptacle 25 into which two electrical pins 26 penetrate, for firing the charge.
- This receptacle is extended by a rectangular base 27 (or square) defining a rectangular opening bordered by two parallel ribs 28 between which the blade 19 is inserted.
- the receptacle 25 is engaged in a sleeve 29 comprising a rectangular opening 30 and two slots 31 allowing the passage of the blade.
- a closed cup 33, assembled to the sleeve 29 defines said clearance space.
- the receptacle 25, the sleeve 29 and the bucket 33 may be of plastics material and assembled as shown by welding or any other method. They then defeat the housing 13.
- an open cup 35 with a rectangular section is inserted into the closed cup 33. It comprises a rectangular lip 36 resting on a shoulder 37 of the closed cup 33.
- the lip 36 has a rectangular incision 39 located facing the periphery of the bottom wall 19a defined in the blade.
- the central portion of the open cup 35 is designed to separate from the outer portion of the lip and accompany the wall 19a in said clearance space 21.
- Two rectangular seals 41, 42 are interposed between the blade and the corresponding opening of the open cup. These joints are located on either side of the rectangular incision 39.
- the pressurized gases accumulate in the chamber 17 and cause the rupture of the two incisions 22 of the blade 19, causing the bottom wall 19a of the chamber 17, as a whole, towards the bottom of the clearance space 21.
- the electrical connection between the ends 20a, 20b of the blade is permanently interrupted.
- the blade may comprise at least one folding zone to allow at least a portion of said broken blade to bend and engage in the clearance space.
- FIGs 4A and 4B a single transverse breakable incision 22 is provided in the middle of the bottom wall 19a.
- Two parallel thinning of the blade located on either side of the incision near the edges of the chamber 17 and parallel to the incision define two folding zones 45.
- the bottom wall 19a breaks in the middle and the two parts of said wall bend and engage in the clearance space 21 by deforming permanently.
- the final situation is illustrated in FIG. 4B and the electrical continuity is interrupted between the ends 20a, 20b.
- FIG. 5 illustrates another embodiment in a representation similar to that of FIG. 2.
- a blade 19 comprising two parallel breakable incisions 22, in the vicinity of two opposite edges of the opening of said gap space. clearance.
- This embodiment is remarkable in that a movable sealing element is incorporated between said gas generator and the conductive blade 19. It forms here a sliding plug 50 capable of moving in said variable configuration chamber.
- This sliding plug is interposed between the gas generator and the blade, before pyrotechnic release. Its watertight sliding prevents gases from reaching the blade during and after the trip.
- FIGS. 7A and 7B illustrate a variant of this embodiment according to which a single breakable incision 22 is defined in the middle of said bottom wall 19a and two folding zones 45 are defined on either side thereof, as in the embodiment of Figures 4A and 4B.
- the operation is similar with the difference that the incision 22 is broken by the sliding plug 50 moved under the effect of the pressure increase in the chamber.
- FIGS. 8A and 8B is similar to the embodiment of FIGS. 6A and 6B, with the difference that the sliding plug 50 is secured to said bottom wall 19a delimited by the two breakable incisions.
- the operation is identical to that of the embodiments of FIGS. 6A and 5B.
- the sliding plug 50a has a lateral extension 53 forming a rib, which bears on a portion of said bottom wall 19a adjacent to a single breakable incision 22 located near a transverse edge of this wall.
- a folding zone 45 is defined parallel to the breakable incision 22 in the vicinity of the other end of said end wall.
- said bottom wall comprises a single breakable incision 22 at its center and two folding zones 45 located on either side of the latter near the ends of the opening of the clearance space 21.
- the sliding plug 50b is provided with a projecting rib 56 bearing, before release, against the bottom wall 19a, parallel to said incision breakable.
- FIGS. 11A and 11B The variant of FIGS. 11A and 11B is similar to that of FIGS. 6A and 6B with respect to the structure of the blade 19.
- the movable sealing element 50c is, before pyrotechnic release, a body 58 with a case 58 gas generator 15 and this case has laterally a breakable zone 59 allowing, at the time of pyrotechnic release, the separation of the lower part of the case which then plays the same role as the sliding cap described above.
- FIGS. 12A and 12B is similar to that of FIGS. 9A and 9B as regards the structure of the blade 19 and the shape of the movable sealing element, but it forms a body, before pyrotechnic release with the case 58 of said gas generator 15 and has a breakable zone 59a allowing the sliding plug to detach under the effect of the pressure of the gas.
- said movable sealing member is a closed bellows 60 installed in the variable configuration chamber 17 and a mouthpiece is connected to an output of said gas generator.
- FIG. 13A the bellows 60 being retracted on itself.
- the structure of the blade is in accordance with that of Figure 5, for example.
- the gases cause elongation of the bellows 60 inside said variable configuration chamber 17, which causes the two incisions to break and the said bottom wall 19a to move inside the chamber.
- the combustion gases remain confined inside the bellows 60.
Landscapes
- Air Bags (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11712991A EP2548213A1 (fr) | 2010-03-15 | 2011-03-11 | Interrupteur electrique a actionnement pyrotechnique |
MX2012010593A MX2012010593A (es) | 2010-03-15 | 2011-03-11 | Interruptor de circuito electrico con accionamiento pirotecnico. |
BR112012023377A BR112012023377A2 (pt) | 2010-03-15 | 2011-03-11 | interruptor elétrico de acionamento pirotécnico. |
KR1020127026879A KR20130057982A (ko) | 2010-03-15 | 2011-03-11 | 점화작용을 구비하는 회로차단기 |
RU2012142547/07A RU2568302C2 (ru) | 2010-03-15 | 2011-03-11 | Прерыватель тока с пиротехнической активацией |
US13/635,178 US20130056344A1 (en) | 2010-03-15 | 2011-03-11 | Electric circuit breaker with pyrotechnic actuation |
CN2011800218557A CN103003907A (zh) | 2010-03-15 | 2011-03-11 | 具有烟火致动的电路断路器 |
CA2793337A CA2793337A1 (fr) | 2010-03-15 | 2011-03-11 | Interrupteur electrique a actionnement pyrotechnique |
JP2012557587A JP2013522834A (ja) | 2010-03-15 | 2011-03-11 | 点火稼働式電気回路ブレーカ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1051816 | 2010-03-15 | ||
FR1051816A FR2957452B1 (fr) | 2010-03-15 | 2010-03-15 | Interrupteur electrique a actionnement pyrotechnique |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011114045A1 true WO2011114045A1 (fr) | 2011-09-22 |
Family
ID=42938331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2011/050494 WO2011114045A1 (fr) | 2010-03-15 | 2011-03-11 | Interrupteur electrique a actionnement pyrotechnique |
Country Status (11)
Country | Link |
---|---|
US (1) | US20130056344A1 (fr) |
EP (1) | EP2548213A1 (fr) |
JP (1) | JP2013522834A (fr) |
KR (1) | KR20130057982A (fr) |
CN (1) | CN103003907A (fr) |
BR (1) | BR112012023377A2 (fr) |
CA (1) | CA2793337A1 (fr) |
FR (1) | FR2957452B1 (fr) |
MX (1) | MX2012010593A (fr) |
RU (1) | RU2568302C2 (fr) |
WO (1) | WO2011114045A1 (fr) |
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JP2014049189A (ja) * | 2012-08-29 | 2014-03-17 | Toyoda Gosei Co Ltd | 導通遮断装置 |
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WO2021043831A1 (fr) * | 2019-09-05 | 2021-03-11 | Panasonic Industrial Devices Europe Gmbh | Dispositif coupe-circuit |
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- 2011-03-11 CN CN2011800218557A patent/CN103003907A/zh active Pending
- 2011-03-11 BR BR112012023377A patent/BR112012023377A2/pt not_active IP Right Cessation
- 2011-03-11 RU RU2012142547/07A patent/RU2568302C2/ru active
- 2011-03-11 MX MX2012010593A patent/MX2012010593A/es active IP Right Grant
- 2011-03-11 CA CA2793337A patent/CA2793337A1/fr active Pending
- 2011-03-11 WO PCT/FR2011/050494 patent/WO2011114045A1/fr active Application Filing
- 2011-03-11 EP EP11712991A patent/EP2548213A1/fr not_active Withdrawn
- 2011-03-11 KR KR1020127026879A patent/KR20130057982A/ko not_active Application Discontinuation
- 2011-03-11 JP JP2012557587A patent/JP2013522834A/ja active Pending
- 2011-03-11 US US13/635,178 patent/US20130056344A1/en not_active Abandoned
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102403766A (zh) * | 2011-11-21 | 2012-04-04 | 苏州盖娅智能科技有限公司 | 一种超级电容充电方法及其实现*** |
JP2014049189A (ja) * | 2012-08-29 | 2014-03-17 | Toyoda Gosei Co Ltd | 導通遮断装置 |
US9324522B2 (en) | 2012-08-29 | 2016-04-26 | Toyoda Gosei Co., Ltd. | Conduction breaking device |
JP2014049300A (ja) * | 2012-08-31 | 2014-03-17 | Toyoda Gosei Co Ltd | 導通遮断装置 |
WO2021043831A1 (fr) * | 2019-09-05 | 2021-03-11 | Panasonic Industrial Devices Europe Gmbh | Dispositif coupe-circuit |
Also Published As
Publication number | Publication date |
---|---|
JP2013522834A (ja) | 2013-06-13 |
EP2548213A1 (fr) | 2013-01-23 |
MX2012010593A (es) | 2012-11-23 |
RU2568302C2 (ru) | 2015-11-20 |
CN103003907A (zh) | 2013-03-27 |
CA2793337A1 (fr) | 2011-09-22 |
RU2012142547A (ru) | 2014-04-20 |
FR2957452B1 (fr) | 2012-08-31 |
FR2957452A1 (fr) | 2011-09-16 |
KR20130057982A (ko) | 2013-06-03 |
US20130056344A1 (en) | 2013-03-07 |
BR112012023377A2 (pt) | 2018-08-07 |
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