Pyrotechnic circuit breaker

Abstract

The present invention relates to a pyrotechnic circuit breaker, - Housing (10), -The conductor (20) that is cut, - A cutting piston (30) that is movable between a stationary position and an operating position, the cutting piston (30) is arranged to cut the conductor (20) while moving from the stationary position to the operating position, -A pyrotechnic actuator (40), the pyrotechnic actuator (40) is housed within a housing (10) and is arranged to move a cutting piston (30) from a stationary position to an operating position when the pyrotechnic actuator (40) is in operation, comprising at least the pyrotechnic actuator (40), The circuit breaker includes at least one deformable member (50) arranged to brake a cutting piston (30) when the conductor (20) is cut, and The present invention relates to a pyrotechnic circuit breaker characterized in that a strictly positive clearance is provided between the deformable member (50) and the conductor (20) before the conductor (20) is cut.

Description

Technical Field

[0001] The present invention generally relates to a pyrotechnic circuit breaker, for example, intended to be attached to a motor vehicle.

Background Art

[0002] Circuit breaker devices are known in the prior art, such as those described in German Patent Application Publication No. 102022113300 (A1), which provide a deformable piston braking device that discharges the high-temperature gas generated by the arc when the conductor is cut. However, this braking system has the drawback that the piston speed decreases before the conductor is completely cut, which increases the time available to establish an arc and presents a greater risk of damaging the device. In addition, since the piston is subject to the resistance of both the conductor and the deformable body during cutting, the cutting process is more prone to variation.

Summary of the Invention

[0003] One object of the present invention is to overcome the above-mentioned drawbacks of the prior art, and in particular, firstly, to have a high cutting speed so as to reach the maximum arc length as quickly as possible when current flows through the circuit breaker, and / or its interruption is repeatable, and / or its housing is less sensitive to the impact that can occur to the piston at the end of the stroke.

[0004] Therefore, a first aspect of the present invention relates to a pyrotechnic circuit breaker, which - a housing, - a conductor to be cut, which at least partially passes through the housing, - a cutting piston housed within the housing and movable between a stationary position and an operating position, the cutting piston being configured to cut the conductor during movement from the stationary position to the operating position -A pyrotechnic actuator comprising at least one pyrotechnic actuator, wherein the pyrotechnic actuator is housed within a housing and is configured to move a cutting piston from a stationary position to an operating position when the pyrotechnic actuator is in operation, The circuit breaker includes at least one deformable member configured to brake a cutting piston when the conductor is cut, and A key feature is that a strictly positive clearance is provided between the deformable member and the conductor before the conductor is cut. According to the above embodiment, a clearance is provided between the conductor and the deformable member, and therefore, when the conductor is cut, the deformable member is not subjected to any force, and the cutting is faster and less variable.

[0005] According to one embodiment, the cutting piston passes through a contact position during its movement from a stationary position to an operating position, where the cutting piston contacts the conductor before the conductor is cut, and a strictly positive clearance is provided between the deformable member and the cutting piston at the contact position. According to the above embodiment, a clearance is provided between the deformable member and the cutting piston when the cutting piston begins to contact the conductor, so that the deformable member is not subjected to any force when the conductor is cut, and the cutting is faster and less variable. In other words, when the cutting piston is at the contact position, a clearance can exist between the cutting piston and the deformable member, so that the cutting piston is not subjected to the resistance force of the deformable member during cutting.

[0006] According to one embodiment, the strictly positive clearance between the deformable member and the cutting piston at the contact position may be strictly greater than the thickness of the conductor being cut, so that the cutting piston has finished cutting the conductor completely before it slows down by deforming the deformable member.

[0007] According to one embodiment, the cutting piston can be configured to shear a conductor.

[0008] According to one embodiment, the cutting piston is - The free stroke can move before the conductor is cut. - The damping stroke can be moved while the deformable member is deformed. To this end, the ratio of the piston's free stroke to its damped stroke can be 1.2 or greater, preferably greater than 1.5. The free distance may be greater than the damped distance. The applicant has found that cutting is rapid and repeatable with such a minimum ratio while minimizing impact on the housing. In fact, the cutting piston needs to be fast enough to properly cut the conductor, and it should be noted that this can be sufficiently damped with the above ratio.

[0009] According to one embodiment, the piston is - After cutting the conductor, it can move in an undamped stroke. - The damping stroke can be moved while the deformable member is deformed. To this end, the ratio of the undamped stroke to the damped stroke can be 0.6 or greater, preferably greater than 0.75, and more preferably greater than 0.85. The applicant has found that cutting is rapid and repeatable at such a minimum ratio while minimizing impact on the housing. It should be noted that, in fact, after cutting, the cutting piston must still move a certain undamped stroke to perform its damped stroke according to the aforementioned ratio in order to ensure the minimum distance between the cut ends of the conductor before damping. This ensures that the minimum distance between the cut ends of the conductor is achieved as quickly as possible.

[0010] According to one embodiment, the deformable member can be configured to be directly deformed by a cutting piston. The variability of the cutting is reduced by the direct contact between the deformable member and the cutting piston, and no intermediate components hinder the operation. In other words, the cutting piston has a dedicated contact portion for direct contact with the deformable member when the conductor is cut. The housing may also have a special path between the cutting piston and the deformable member that is free of obstacles or components.

[0011] According to one embodiment, the deformable member can be separated from the cutting piston and / or housing. According to this embodiment, the deformable member can be at least partially mounted within the housing and dedicated to the damping function of the cutting piston.

[0012] According to one embodiment, the deformable member can be configured to form a part of the cutting piston or housing. According to this embodiment, the deformable member may be a member attached to the cutting piston or housing, or it may be integrated with the cutting piston or housing. The deformable lug can be formed, for example, directly on the cutting piston or housing.

[0013] According to one embodiment, the deformable member can be configured to be plastically deformable in order to dampen the cutting piston. In other words, irreversible deformation of the deformable member can be provided to effectively dampen the cutting piston and dissipate its kinetic energy. Such plastic deformation also reduces the risk of the cutting piston bouncing back.

[0014] According to one embodiment, the deformable member can be configured to be deformable (plastic and / or elastically) over a stroke of at least 1 mm of the cutting piston, over a stroke of at least 2 mm of the cutting piston, and over a stroke of at least 3 mm of the cutting piston.

[0015] According to one embodiment, the deformable member can be configured to be plastically deformed over a stroke of at least 1 mm of the cutting piston, over a stroke of at least 2 mm of the cutting piston, and over a stroke of at least 3 mm of the cutting piston. Therefore, the deformable member does not have the same dimensions before and after the circuit breaker is triggered.

[0016] According to one embodiment, the circuit breaker has, or may have, a stopping means for defining the operating position of the cutting piston within the housing. According to one embodiment, the stopping means may be separated from the deformable member and may not interact with the deformable member. In other words, the stopping means can be positioned at a certain distance from the deformable member. On the one hand, the cutting piston can be braked by the deformable member (through a first contact interface), and on the other hand, its movement can be ultimately stopped by the stopping means through a second contact interface. In this way, stopping and damping can be separated and better controlled.

[0017] According to one embodiment, the cutting piston may have at least one contact portion configured to directly contact the deformable member when the conductor is cut. The cutting piston has a portion dedicated to contacting the deformable member, and thus the damping function is repeatable.

[0018] According to one embodiment, the cutting piston may comprise at least one cutting portion configured to directly cut a conductor, the at least one cutting portion being separated from the at least one contact portion and / or the at least one cutting portion being offset from the at least one contact portion with respect to the direction of movement of the cutting piston. The cutting piston is dedicated to contact with the deformable member and has a portion separate from the cutting portion, so that the cutting and damping functions are repeatable.

[0019] According to one embodiment, -The conductor may have a thickness that is cut. - In the stationary position, the cutting piston (30) can be arranged at a first distance from the conductor, - In the stationary position, the cutting piston (30) can be arranged at a second distance from the deformable member, and the second distance can be equal to or greater than the sum of the first distance and the thickness (e) to be cut, and preferably, the second distance can be strictly greater than the sum of the first distance and the thickness (e) to be cut. According to this embodiment, the cutting piston first contacts the conductor and then contacts the deformable member.

[0020] According to one embodiment, the cutting piston can be configured to irreversibly deform the deformable member. The kinetic energy of the cutting piston is absorbed by irreversible deformation (e.g., plastic deformation). In other words, the deformable member can be intended to irreversibly deform when the cutting piston is damped. In other words, the moving speed applied to the cutting piston by the pyrotechnic actuator gives the cutting piston sufficient energy, and the deformable member is intended to plastically deform to dissipate at least a part of the kinetic energy of the cutting piston.

[0021] According to one embodiment, the deformable member can include a body and at least one damping portion, and the cutting piston (30) can be configured to deform only the at least one damping portion, preferably only the at least one damping portion. The damping portion is intended to be deformed, so that the cutting piston braking is more repeatable.

[0022] According to one embodiment, - The deformable member can include at least two damping portions, preferably an even number of damping portions, and is preferably distributed symmetrically around the cutting piston, - The cutting piston can include at least two contact portions, - And the at least one cutting portion can be disposed between the at least two contact portions. The braking force is well distributed to the cutting piston, the cutting piston does not receive a tipping torque or a jamming torque, and the movement of the cutting piston is more repeatable.

[0023] According to one embodiment, the deformable member can be configured to absorb heat so as to cool the interior of the housing that can be heated by an arc caused by the operation of the cutting and / or pyrotechnic actuator.

[0024] According to one embodiment, the deformable member can be a metal and / or porous and / or filter body while still being easily deformable and resistant to the high temperatures generated.

[0025] According to one embodiment, the deformable member can be a part of the housing, such as a partially overmolded metal insert. The "all-in-one" design reduces manufacturing cost and / or complexity. The deformable member can be at least partially integrated with the housing. It is possible to provide a composite housing. The housing can include a partition section for defining a preferably watertight separation between the internal member and the exterior of the circuit breaker. The housing can be designed to have a deformable portion that is attached, integrated, or overmolded to the partition portion. The deformable portion can be formed by a metal insert having a fixed portion attached or overmolded to the body of the housing (e.g., the partition portion) and an active or deformable portion located within the path of the cutting piston.

[0026] According to one embodiment, the deformable member may include braided metal and / or compressed metal wire to attenuate the cutting piston.

[0027] According to one embodiment, the housing may include a contact surface configured to provide a mechanical stop for the cutting piston and thus define an operating position. The operating position is defined robustly and reliably.

[0028] According to one embodiment, the deformable member may be located within the housing. Depending on the structure of the cutting piston and the portion of the cutting piston that contacts the deformable member, the deformable member may be located on either side of the conductor.

[0029] According to one embodiment, a second aspect of the present invention relates to an automobile that may be equipped with at least one pyrotechnic circuit breaker according to the first aspect of the present invention. [Brief explanation of the drawing]

[0030] Other features and advantages of the present invention will become more apparent by reading the following embodiments for carrying out the invention, which are provided as examples but are not limited to those shown in the accompanying drawings. [Figure 1] Figure 1 shows a cross-sectional view of a pre-trigger pyrotechnic circuit breaker, which comprises, in particular, a housing through which a conductor passes, a pyrotechnic actuator, a cutting piston designed to cut the conductor when the pyrotechnic actuator is activated or triggered, and three deformable members designed to brake the cutting piston after the conductor has been cut. [Figure 2] Figure 2 shows a cross-sectional view of the circuit breaker in Figure 1 after the pyrotechnic actuator has been activated or triggered. [Figure 3] Figure 3 shows an isometric view of the circuit breaker shown in Figure 1 after cutting, before the cutting piston reaches the end of its stroke. [Figure 4] Figure 4 shows a cross-sectional view of the circuit breaker in Figure 1, in a cross-section perpendicular to the cross-section shown in Figure 1, before the pyrotechnic actuator is activated or triggered. [Modes for carrying out the invention]

[0031] Figure 1, in particular, - The housing 10 is formed by the lower housing portion 12 and the upper housing portion 11. - A conductor 20 that passes through the housing 10 and connects the two connection terminals 21 and 22, -In this example, a pyrokinetic actuator 40 formed by an electric pyrokinetic igniter, - A deformable member 50 is placed inside the housing 10. - The circuit breaker includes a cutting piston 30, the cutting piston 30 comprising a body 33 surrounding a pyrotechnic actuator 40 and three projections 31 on the opposite side separated by a groove 32.

[0032] Therefore, the housing 10 comprises a lower housing portion 12 and an upper housing portion 11. As shown in Figure 1, one or more seals can be provided between the lower housing portion 12, the conductor 20 (particularly around the overmolded portion 26 overmolded on the conductor 20), and the upper housing portion 11. The housing 10 can be made from a plastic (e.g., polyamide) having a reinforcing material (glass fiber) or further having a metal insert.

[0033] With respect to the conductor 20, the two inner ends 25 define the edges of the portion 20A of the conductor 20 that is to be cut. Between the two inner ends 25, the conductor 20 is in contact with the return on the lower housing 12, forming a matrix.

[0034] In Figure 1, the cutting piston 30 occupies a stationary position facing the portion 20A of the conductor 20 that is to be cut. In particular, the three protrusions 31 are positioned at a predetermined distance a (shown in Figure 4) from the portion 20A of the conductor 20 that is to be cut.

[0035] The three deformable members 50 are housed within the lower housing 12 at a predetermined distance b (shown in Figure 4) from the conductor 20.

[0036] Figure 1 shows the space between the pyrotechnic actuator 40 and the body 33 of the cutting piston 30, which forms the combustion chamber. In addition, the space between the cutting piston 30 and the portion to be cut 20A, and the space between the portion to be cut 20A and the deformable member 50 form the cutting chamber. The combustion chamber and the cutting chamber are sealed to each other by a seal mounted on the cutting piston 30.

[0037] Figure 2 shows the circuit breaker of Figure 1 after the conductor 20 has been cut, with the cutting piston 30 in the operating position. Under the pressure generated by the high-temperature gas produced by the pyrotechnic actuator 40, the cutting piston 30 moves downward within the housing 10 of Figure 2 to occupy the indicated operating position.

[0038] As the cutting piston 30 moves, the conductor 20 is cut into at least four distinct parts (two distinct lateral parts 23, each having an internal end 25, and at least two central parts 24).

[0039] The cutting piston 30 is in mechanical contact with the overmolded portion 26, and as can be seen in Figure 2, the operating position of the cutting piston in Figure 2 is precisely defined. In particular, the two inclined portions B1 and B2 provide mechanical stops for the cutting piston 30 on the housing 10. Note that the inclined portions B1 and B2 are separate from and isolated from the deformable member 50.

[0040] Figure 3 shows a partial view of the circuit breaker before the cutting piston 30 reaches the operating position shown in Figure 2, and shows only the cutting piston 30, a portion of the conductor 20, and the deformable member 50 after the conductor 20 has been cut and before the deformable member 50 has been deformed.

[0041] It should be noted that each of the three protrusions 31 of the cutting piston 30 consists of a cutting portion 31A designed to cut, shear, or slice the conductor 20, and two contact portions 31B each designed to contact the damping portion 50B of each deformable member 50.

[0042] Accordingly, each deformable member 50 comprises a body forming a cooling section 50A designed to cool the air in the circuit breaker cutting chamber, and two deformable (preferably irreversible) damping sections 50B adjacent to the cooling section 50A. The damping sections 50B are offset relative to the cooling section 50A in the direction of movement of the cutting piston 30, so that when the cutting piston 30 reaches the operating position shown in Figure 2, it contacts the damping sections 50B rather than the cooling section 50A. This allows for more precise adjustment of the damping of the cutting piston 30, and thus ensures that the stroke of the cutting piston 30 after cutting the conductor 20 is sufficient and controlled to guarantee current disconnection.

[0043] The deformable member 50A may be formed as metal and / or porous and / or filter material and may include braided metal and / or compressed metal wires. Wires having a diameter of 0.2 mm to 1.5 mm can be used.

[0044] Figure 4 shows a cross-sectional view of the circuit breaker shown in Figure 1, passing through the cutting piston 30 and the deformable member 50. Figure 4 shows the circuit breaker before triggering, with the cutting piston in the stationary position. Of particular note is, - A predetermined distance a between the cutting portion 31A of the cutting piston 30 and the portion 20A of the conductor 20 that is to be cut, - A predetermined distance b between the conductor 20 and the cooling portion 50A of the deformable member 50, - This is a predetermined distance c between the contact portion 31B of the cutting piston 30 and the damping portion 50B of the deformable member 50.

[0045] If e is the thickness of the part 20A that is cut, Please note that c > a.

[0046] In other words, the circuit breaker is designed so that the disconnecting portion 31A contacts the portion 20A to be disconnected before the contact portion 31B contacts the attenuation portion 50B.

[0047] Next, we will explain the operation of circuit breakers in detail.

[0048] When the need for rapid cutting of the conductor 20 is identified, the pyrokinetic actuator 40 is triggered, generating high pressure in the combustion chamber (the space between the pyrokinetic actuator 40 and the cutting piston 30), which pushes the cutting piston 30 from the stationary position shown in Figure 1 to the operating position shown in Figure 2.

[0049] During this movement, the cutting piston 30 first covers a free stroke of a predetermined length a (the distance between the protrusion 31 and the portion 20A to be cut in Figure 4) between its stationary position and the contact position with the conductor 20. When in contact, the conductor 20 is cut by the cutting piston 30, for example, by mechanical shear.

[0050] As shown in Figure 1, the projection 31 separated by the groove 32 forms a knife that cuts the portion 20A to be cut. As the cutting piston 30 moves from the stationary position to the operating position, the projection 31 on the cutting piston 30 contacts the unsupported portion of the conductor 20, shearing the conductor 20 at the portion 20A to be cut. As shown in Figure 2, the shearing of the conductor 20 results in the formation of two separate central conductive portions 24 (as seen in Figure 2) separated from the rest of the conductor 20, particularly the separate lateral portions 23, after the opening.

[0051] Furthermore, at the very beginning of opening, when the inner ends 25 are still close to the central portion 24, if the pyrotechnic circuit breaker has current flowing through it, an electric arc can be formed between each inner end 25 and the central portion 24. During the movement of the cutting piston 30 from the stationary position to the operating position, the cutting piston 30 pushes and bends each individual lateral portion 23, and as a result, the electric arc moves along an arc path that is "pulled" or "extended". This ensures that at the end of operation, there is sufficient free distance to ensure the extinguishing of the electric arc and the disconnection of the current that was initially flowing through the conductor 20.

[0052] After leaving the contact position and beginning to cut or cleave the conductor 20, the cutting piston 30 continues an undamped stroke (equal to CAE) before being damped by the damping portion 50B of the deformable member 50 that contacts the contact portion 31B of the cutting piston 30. As a result, the damping portion 50B absorbs the kinetic energy of the cutting piston 30 and gradually deforms irreversibly.

[0053] Figures 1, 2, and 4 show that a positive clearance remains between the conductor 20 and the deformable member 50 regardless of the position of the cutting piston 30. In particular, Figure 4 shows that the conductor 20 is separated from the deformable body 50, and when the conductor 20 is cut, the two parts do not come into contact, and no additional force is required to cut the conductor 20.

[0054] The non-damping stroke (after cutting) and the clearance between the conductor 20 and the deformable member 50 mean that the cutting piston 30 does not begin to be decelerated by the deformable member 50 until the conductor 20 is completely cut, thus cutting the conductor 20 at high speed and minimizing the aforementioned arc "stretching" and "extension." Thus, cutting the conductor 20 and interrupting the electrical circuit is rapid and repeatable.

[0055] Therefore, the cutting piston 30 is mounted to the housing 10 by a sliding or translational connection and slides from a stationary position to an operating position during its movement, thereby providing repeatable and controlled operation and operating position, and ensuring rapid cutting and arc extinguishing at the end of operation. However, the cutting step using an electric arc may generate hot gas that needs to be cooled. For this purpose, the deformable member has a cooling section 50A (shown in Figures 1 to 4). In this way, the structure of the circuit breaker can be kept simple, and the deformable member has two functions in a separate part: - Braking of the cutting piston 30 by the damping portion 50B, - Gas cooling is performed using a 50A cooler.

[0056] Furthermore, it should be noted that the damping portion 50B "surrounds" the conductor 20 so that the damping force applied to the cutting piston 30 is well distributed and the risk of jamming is limited. In other words, the damping portion 50B is distributed on both sides of the conductor 20 and / or the cutting piston 30. [Industrial applicability]

[0057] The circuit breaker and its manufacturing method according to the present invention are industrially applicable.

[0058] It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described herein without departing from the scope of the invention. In particular, separate components for cooling and damping can be provided. For example, the damping portion can be integrated into the housing 10 (for example, together with a deformable lug or an overmolded insert having a portion protruding into the cutting chamber).

Claims

1. A pyrotechnic circuit breaker, - Housing (10), - A conductor (20) that is cut, passing at least partially through the housing (10), - A cutting piston (30) housed within the housing (10) and movable between a stationary position and an operating position, wherein the cutting piston (30) is arranged to cut the conductor (20) as it moves from the stationary position to the operating position, - A pyrotechnic actuator (40) is housed within the housing (10) and is positioned to move the cutting piston (30) from the stationary position to the operating position when the pyrotechnic actuator (40) is in operation, comprising at least the pyrotechnic actuator (40), The circuit breaker includes at least one deformable member (50) arranged to brake the cutting piston (30) when the conductor (20) is cut, and A pyrotechnic circuit breaker characterized in that a strictly positive clearance is provided between the deformable member (50) and the conductor (20) before the conductor (20) is cut.

2. The pyrotechnic circuit breaker according to claim 1, wherein the cutting piston (30) passes through a contact position as it moves from the stationary position to the operating position, the contact position being the position where the cutting piston (30) is in contact with the conductor (20) before being cut, and a strictly positive clearance is provided between the deformable member (50) and the cutting piston (30) at the contact position.

3. The pyrotechnic circuit breaker according to claim 2, wherein the strictly positive clearance provided between the deformable member (50) and the cutting piston (30) at the contact position is strictly greater than the thickness (e) of the conductor (20) that is cut.

4. The cutting piston (30) - Before cutting the conductor (20), move the free stroke, - The damping stroke is moved while the deformable member (50) is deformed. The pyrotechnic circuit breaker according to any one of claims 1 to 3, wherein the ratio of the free stroke to the damped stroke is 1.2 or more, preferably greater than 1.

5.

5. The cutting piston (30) - After cutting the conductor (20), move the non-damping stroke, - The damping stroke is moved while the deformable member (50) is deformed. The pyrotechnic circuit breaker according to any one of claims 1 to 4, wherein the ratio of the undamped stroke to the damped stroke is 0.6 or more, preferably greater than 0.75, and more preferably greater than 0.

85.

6. The pyrotechnic circuit breaker according to any one of claims 1 to 5, wherein the deformable member (50) is arranged to be directly deformed by the cutting piston (30).

7. The pyrotechnic circuit breaker according to any one of claims 1 to 6, wherein the cutting piston (30) comprises at least one contact portion (31B) arranged to directly contact the deformable member (50) when the conductor (20) is cut.

8. The pyrotechnic circuit breaker according to claim 7, wherein the cutting piston (30) comprises at least one cutting portion (31A) arranged to directly cut the conductor (20), the at least one cutting portion (31A) being separated from the at least one contact portion (31B) and / or the at least one cutting portion (31A) being offset from the at least one contact portion (31B) with respect to the direction of movement of the cutting piston (30).

9. - The conductor (20) has a thickness (e) that is cut, - In the stationary position, the cutting piston (30) is positioned at a first distance from the conductor (20). - In the stationary position, the cutting piston (30) is positioned at a second distance from the deformable member (50). The pyrotechnic circuit breaker according to any one of claims 1 to 8, wherein the second distance is greater than or equal to the sum of the first distance and the thickness to be cut (e), and preferably the second distance can be made more than the sum of the first distance and the thickness to be cut (e).

10. The pyrotechnic circuit breaker according to any one of claims 1 to 9, wherein the cutting piston (30) is arranged to irreversibly deform the deformable member (50).

11. The pyrotechnic circuit breaker according to any one of claims 1 to 10, wherein the deformable member (50) comprises a main body and at least one damping portion (50B), and the cutting piston (30) is arranged to deform only the at least one damping portion (50B), preferably only the at least one damping portion (50B).

12. - The deformable member (50) comprises at least two damping portions (50B), preferably an even number of damping portions (50B), preferably distributed symmetrically around the cutting piston (30), - The cutting piston (30) has at least two contact portions (31B), - The pyrotechnic circuit breaker according to claim 11, as dependent on claim 8, wherein the at least one cut portion (31A) is located between the at least two contact portions (31B).

13. The pyrotechnic circuit breaker according to any one of claims 1 to 12, wherein the deformable member (50) is arranged to absorb heat.

14. The pyrotechnic circuit breaker according to any one of claims 1 to 13, wherein the deformable member (50) is made of metal and / or porous and / or filter material.

15. The pyrotechnic circuit breaker according to any one of claims 1 to 14, wherein the deformable member (50) is, for example, a part of the housing (10), such as a partially overmolded metal insert.

16. The pyrotechnic circuit breaker according to any one of claims 1 to 15, wherein the deformable member (50) includes braided metal and / or compressed metal wire.

17. The pyrotechnic circuit breaker according to any one of claims 1 to 16, wherein the housing (10) has a contact surface arranged to provide a mechanical stop for the cutting piston (30) and thus define the operating position.

18. The pyrotechnic circuit breaker according to any one of claims 1 to 17, wherein the deformable member (50) is disposed within the housing (10).

19. An automobile comprising at least one pyrotechnic circuit breaker as described in any one of claims 1 to 18.

Images