Mechanical tripping type quick disconnect device

Abstract

A mechanical tripping type quick breaking device. The existing pyrotechnic fire generator signal control without mechanical drive problem is solved. It includes a shell; a fire generator is arranged in the shell, which is used for disconnecting the circuit; a striker is arranged in the shell; the striker has a first position during installation and a second position for driving the fire generator to act; a mechanical tripping structure, the mechanical tripping structure includes a tripping frame, a connecting rod and a lock catch, the lock catch is arranged on the tripping frame, the lock catch has a first position for locking the striker and a second position for unlocking the lock catch driven by the connecting rod to facilitate the free movement of the striker; an elastic element is connected with the striker, and the elastic element has a movement tendency of driving the striker to tend to the second position. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

Description

Technical Field

[0001] This utility model relates to a rapid circuit breaking technology, specifically a mechanical tripping type rapid circuit breaking device. Background Technology

[0002] New energy storage cabinets and electric vehicles both contain large-capacity batteries that store a significant amount of electrical energy. Taking electric vehicles as an example, electric vehicles use power batteries as their power source. These power batteries are generally large and store a large amount of electrical energy. Due to technological limitations of power batteries, they are prone to explosion and combustion in situations such as thermal runaway, collisions, and abnormal discharges. Current solutions mainly focus on cutting off the power battery's output current in these situations. There are two main solutions: one is to use a fuse and contactor connected in series to detect information such as the power battery's heat, abnormal discharge, and vehicle collisions (e.g., detecting airbag deployment signals). Once a preset condition is met, the contactor is disconnected via an electrical signal, or the fuse is blown under high current conditions to break the circuit. However, due to the instantaneous acceleration characteristics of electric vehicles and the high risk of collisions and other accidents, the protective function provided by traditional thermal fuses in electric vehicles is limited by slow speed or inability to achieve the desired effect. The reason is that when an electric vehicle experiences a major accident such as a collision, the fault current in the electric vehicle may not be generated or may be very small. Traditional fuses cannot melt and protect the circuit, and they become unusable once the entire vehicle loses power, thus posing a potential safety hazard. Another method is to install an explosive device at the busbar of the power battery. Once a preset condition is met, the explosive will ignite and use its force to forcibly cut the busbar, thus breaking the circuit. Currently, various new types of fuses have emerged, among which the most widely used is the pyrotechnic circuit breaker (ignition generator). The function of the pyrotechnic circuit breaker is mainly to protect against the blind spots of traditional fuses. In use, the pyrotechnic circuit breaker is connected in series with a traditional fuse in the circuit. When a short circuit occurs and the traditional fuse fails to operate, the vehicle control system (usually the vehicle's BMS battery management system) will send a signal to the pyrotechnic circuit breaker to disconnect, thus completing the protection. When normal current flows, the current flows through the current-carrying copper busbar, and its withstand capability is greatly improved compared to traditional fuses. When a short circuit occurs, the pyrotechnic device receives an ignition signal and is subsequently ignited. The high temperature and pressure generated during the ignition interrupt the flow of current through the copper busbar (the pyrotechnic circuit breaker directly breaks the busbar, or sometimes a cutter is used), dividing the busbar into two parts and disconnecting the circuit. Existing pyrotechnic circuit breakers typically use signal control to directly activate the device and disconnect the busbar. However, if the signal fails or there is a short circuit or overload, the circuit breaker may fail to disconnect the circuit, posing a safety hazard. Utility Model Content

[0003] To address the problem that existing pyrotechnic circuit breakers in the background art are controlled by signals and lack mechanical drive, this utility model provides a mechanically tripped fast circuit breaker.

[0004] The technical solution of this utility model is: a mechanically tripped fast circuit breaker, comprising a housing, and further comprising:

[0005] A fire generator, located inside the housing, is used to disconnect the circuit;

[0006] The striking component is disposed within the housing; the striking component has a first position during installation and a second position for driving the fire generator.

[0007] A mechanical release structure, comprising a release frame, a connecting rod, and a latch, wherein the latch is disposed on the release frame and has a first position for locking the striking component and a second position for unlocking the striking component by being driven by the connecting rod to allow free movement of the striking component;

[0008] An elastic element, connected to the striking element, has a tendency to drive the striking element toward its second position.

[0009] As a further improvement of this utility model, the mechanical release structure includes a carrier buckle, and the connecting rod drives the locking buckle to unlock by means of the carrier buckle.

[0010] As a further improvement of this utility model, the latch is provided with a hook portion, which connects with the striking member and limits the striking member when the latch is in the first position.

[0011] As a further improvement of this utility model, the buckle is provided with a top block, and the latch is provided with a clearance hole. The top block abuts against the latch and keeps the latch in its first position.

[0012] As a further improvement of this utility model, the release frame is provided with a receiving cavity, the latch is provided in the receiving cavity, the connecting rod includes a first drive plate and a second drive plate, the connecting rod is inserted into the receiving cavity and slides horizontally with the release frame, the second drive plate is provided with an unlocking part, the unlocking part causes the latch to rotate relative to the release frame through the buckle and causes the latch to unlock the striking member.

[0013] As a further improvement of this utility model, both the carrier buckle and the locking buckle are hinged to the release frame, the first drive plate and the second drive plate are arranged in an L-shape, and the release frame is provided with a limiting shaft; the unlocking part pushes the lower part of the carrier buckle, thereby causing the locking buckle to rotate relative to the release frame to unlock the striking part.

[0014] As a further improvement of this utility model, the elastic element includes a torsion spring and / or a tension spring, the torsion spring and / or tension spring being connected to the striking element and having the function of driving the striking element to tend to its second position; the striking element is provided with a striking part for pushing the firing pin to move and an arc-shaped part for driving the locking action to rotate the locking and lock the striking element.

[0015] As a further improvement to this utility model, it also includes:

[0016] Conductive busbars are used to conduct electricity in circuits.

[0017] A protective device is provided on the busbar circuit and is used for overload and / or short circuit protection; the protective device moves the latch from a first position to a second position by pushing the connecting rod.

[0018] As a further improvement of this utility model, the protection device includes a short-circuit protection mechanism and an overload protection mechanism. Both the short-circuit protection mechanism and the overload protection mechanism are provided with push blocks for pushing the connecting rod to move. The distance between the push block and the connecting rod is adjustable.

[0019] As a further improvement of this utility model, the striking member is connected to the fire generator via a striking pin, and when the striking member is in the second position, it causes the fire generator to operate to cut off the circuit at the conductive busbar.

[0020] The beneficial effects of this utility model are that it incorporates a mechanical release structure. The striking component is locked by a latch, and the latch is unlocked via a connecting rod, allowing the striking component to move freely and drive the fire generator. This ensures convenient and reliable operation and achieves reliable control. This utility model also boasts advantages such as simple structure, easy assembly, reliable operation, and long service life. Attached Figure Description

[0021] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] Appendix Figure 2 This is a schematic diagram of the structure of the latch in the first position according to an embodiment of the present invention.

[0023] Appendix Figure 3 For the appendix Figure 2 A schematic diagram of the explosion structure from another direction.

[0024] Appendix Figure 4 This is a schematic diagram of the structure of the latch in the second position according to an embodiment of the present invention.

[0025] Appendix Figure 5 For the appendix Figure 4 A schematic diagram of the explosion structure.

[0026] Appendix Figure 6For the appendix Figure 4 A schematic diagram of the main structure.

[0027] Appendix Figure 7 This is a cross-sectional view of the striking component in the second position according to an embodiment of the present invention.

[0028] In the diagram, 1. Housing; 2. Fire generator; 3. Strike component; 31. Strike part; 32. Arc-shaped part; 4. Mechanical release structure; 41. Release frame; 411. Receiving cavity; 412. Limiting shaft; 42. Connecting rod; 421. First drive plate; 422. Second drive plate; 423. Unlocking part; 43. Lock; 431. Hook part; 432. Clearing hole; 44. Elastic element; 45. Carrying buckle; 451. Top block; 5. Conductive busbar; 6. Protection device; 61. Short circuit protection mechanism; 62. Overload protection mechanism; 63. Push block; 7. Strike pin. Detailed Implementation

[0029] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0030] Depend on Figure 1 Combination Figures 2-7 As shown, a mechanically tripped fast circuit breaker includes a housing 1, and further includes:

[0031] The fire generator 2 is located inside the housing 1 and is used to disconnect the circuit. Typically, a cutter can be installed at the fire generator. When the fire generator is activated, the cutter is driven to activate and disconnect the conductive bus circuit. Alternatively, the end of the fire generator can be configured to cut the conductive bus.

[0032] The striking component 3 is disposed within the housing 1; the striking component 3 has a first position during installation and a second position for driving the fire generator 2 to operate.

[0033] Mechanical release structure 4, which includes a release frame 41, a connecting rod 42 and a lock 43, wherein the lock 43 is disposed on the release frame 41, and the lock 43 has a first position for locking the striking member 3 and a second position for unlocking by the connecting rod 42 to allow the striking member 3 to move freely.

[0034] The elastic element 44 is connected to the striking element 3, and the elastic element 44 has a tendency to drive the striking element 3 towards its second position. The beneficial effect of this utility model is that it provides a mechanical release structure, which locks the striking element through a latch and unlocks it through a connecting rod, allowing the striking element to move freely and drive the firearm generator to operate. This makes the operation convenient and reliable, achieving reliable control. This utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life. The firearm generator of this utility model can adopt the structure of existing firearm generators, but the triggering method is changed from electrical signal triggering to pure mechanical triggering. This allows the firearm generator to operate even in the event of power failure, signal failure, short circuit, or overload, through the mechanical release structure. Specifically, the existing firearm generator can adopt commercially available pyrotechnic firearm generators, or it can include a first firearm housing, a second firearm housing, and a propellant and a detonator housed within the first and second firearm housings. The propellant is a mixture of agents that ignites deflagration through mechanical impact or adiabatic compression of air bubbles. Its main components are initiating explosive, combustible agent, and oxidizer, and it may also contain additives such as desensitizers, sensitizers, and binders. Upon ignition, a hot spot is generated, the initiating explosive decomposes, and subsequently, the combustible agent and oxidizer undergo a combustion reaction. The resulting flame ignites the propellant, ignition charge, delay charge, or detonator. The propellant typically refers to the gunpowder contained within the firearm casing for launching. In this invention, a mechanical tripping structure causes the striking element to move the firing pin. The firing pin strikes the end of the firearm generator, igniting the propellant. The propellant rapidly diffuses and ignites the propellant. After ignition in a relatively confined environment, the propellant rapidly releases a large amount of energy to drive the firearm generator. The firearm generator then drives a cutter to disconnect the conductive busbar, thus breaking the conductive busbar circuit. This invention, through a mechanical tripping structure driving the firearm generator, ensures rapid response, reliable operation, and high safety. The fire generator can be used in conjunction with a cutter or its own structure can be used to break a circuit; that is, the fire generator can disconnect the circuit at the conductor bar. This invention can be used in products such as electric vehicles and new energy storage cabinets.

[0035] The mechanical release structure 4 includes a carrier buckle 45. The connecting rod 42 drives the locking buckle 43 to unlock via the carrier buckle 45. Specifically, the locking buckle 43 is provided with a hook portion 431. When the locking buckle 43 is in the first position, the hook portion 431 is connected to and limits the striking member 3. The carrier buckle can hold the locking buckle in place when it is in the first position, ensuring that the locking buckle is reliably held in its first position and preventing the striking member from slipping (maloperation) due to upward movement caused by the elastic element (spring and / or torsion spring). The carrier buckle can activate the locking buckle when the connecting rod moves, making the transmission convenient and reliable. In fact, both the carrier buckle and the locking buckle are provided with torsion springs. The torsion spring on the locking buckle can drive the locking buckle to rotate towards the carrier buckle (towards the second position of the locking buckle), which facilitates the unlocking of the locking buckle. When unlocking, the locking buckle moves quickly, and the torsion spring on the carrier buckle can push the hook portion towards the striking member (making the locking buckle approach its first position) for limiting.

[0036] The buckle 45 is provided with a top block 451, and the latch 43 is provided with a clearance hole 432. The top block 451 abuts against the latch 43, keeping the latch 43 in its first position. The top block limits the latch and prevents it from slipping due to accidental movement. The clearance hole allows the top block to move when the latch is in its second position.

[0037] The release frame 41 has a receiving cavity 411, and the latch 43 is disposed within the receiving cavity 411. The connecting rod 42 includes a first drive plate 421 and a second drive plate 422. The connecting rod 42 is inserted into the receiving cavity 411 and slides horizontally with the release frame 41. The second drive plate 422 has an unlocking part 423. The unlocking part 423 causes the latch 43 to rotate relative to the release frame 41 through the carrier latch 45, thereby unlocking the striking member 3. The unlocking part can reliably drive the carrier latch to rotate through the horizontal movement of the connecting rod, thereby quickly unlocking the latch. The structure is simple and the transmission is convenient and reliable. The receiving cavity improves the overall integrity of the product and facilitates the integrated installation of the mechanical release structure.

[0038] Both the buckle 45 and the latch 43 are hinged to the release frame 41. The first drive plate 421 and the second drive plate 422 are arranged in an L-shape. The release frame 41 is provided with a limiting shaft 412. The unlocking part 423 pushes the lower part of the buckle 45, thereby causing the latch 43 to rotate relative to the release frame 41 to unlock the striking member 3. Specifically, the limiting shaft can be used to limit the movement of the first drive plate and / or to limit the movement of the buckle, preventing the connecting rod and buckle from moving excessively.

[0039] The elastic element 44 includes a torsion spring and / or a tension spring, which is connected to the striking member and drives the striking member 3 to its second position. The striking member 3 is provided with a striking part 31 for pushing the firing pin 7 and an arc-shaped part 32 for driving the latch 43 to rotate and lock the striking member 3. The arc-shaped part facilitates the striking member to press down (when the striking member is in its first position) past zero (over the downward stroke) so that the latch flips and locks the striking member. The torsion spring and / or tension spring enable the striking member to move quickly, resulting in a simple structure and a rapid response when the latch unlocks.

[0040] This utility model also includes:

[0041] Busbar 5 is used for circuit conduction;

[0042] A protection device 6 is installed on the circuit of the conductive busbar 5 and is used for overload and / or short-circuit protection. The protection device 6 moves the latch 43 from a first position to a second position by pushing the connecting rod 42. Specifically, the protection device 6 includes a short-circuit protection mechanism 61 and an overload protection mechanism 62. Both the short-circuit protection mechanism 61 and the overload protection mechanism 62 are provided with push blocks 63 for pushing the connecting rod 42. The distance between the push blocks 63 and the connecting rod 42 is adjustable. More specifically, the striking element 3 is connected to the fire generator 2 via a striking pin 7, and when the striking element 3 is in the second position, it causes the fire generator 2 to actuate and cut off the circuit at the conductive busbar 5. The protection device can employ overload protection and / or short-circuit protection mechanisms. The specific structure of these mechanisms can be implemented using existing molded case circuit breakers, and will not be elaborated further. For example, the overload protection mechanism can be a bimetallic strip. During an overload, the bimetallic strip drives a pusher block. The bimetallic strip is a composite material composed of two or more metals or other materials with suitable properties. Also known as a thermal bimetallic strip, due to the different thermal expansion coefficients of its constituent layers, the deformation of the active layer is greater than that of the passive layer when the temperature changes. This causes the bimetallic strip to bend towards the passive layer, resulting in a change in the curvature of the composite material and thus deformation. The short-circuit protection mechanism includes a moving iron core, a stationary iron core, and a core frame. During a short circuit, the moving iron core can move relative to the stationary iron core, driving the pusher block. This structure allows mechanical overloads and short circuits to trigger the spark arrester, disconnecting the conductive discharge circuit. This makes the product safer and provides diverse control and disconnection methods, ensuring vehicle safety. In this invention, the striking component drives the firing pin to move. After the firing pin strikes the first firearm housing or is driven into the first firearm housing, it ignites the propellant. The propellant spreads rapidly and quickly ignites the propellant. After being ignited in a relatively closed environment, the propellant rapidly releases a large amount of energy to push the second firearm housing. The second firearm housing drives the cutter or the second firearm housing directly cuts off the conductive bar.

[0043] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A mechanically tripped fast circuit breaker, comprising a housing (1), characterized in that: Also includes: A fire generator (2) is located inside the housing (1) and is used to disconnect the circuit; The striking component (3) is disposed inside the housing (1); the striking component (3) has a first position when installed and a second position that drives the fire generator (2) to operate; The mechanical release structure (4) includes a release frame (41), a connecting rod (42) and a lock (43). The lock (43) is located on the release frame (41). The lock (43) has a first position that locks the striking member (3) and a second position that is unlocked by the connecting rod (42) to allow the striking member (3) to move freely. The elastic element (44) is connected to the striking element (3), and the elastic element (44) has a tendency to drive the striking element (3) to its second position.

2. The mechanical tripping type fast circuit breaker according to claim 1, characterized in that... The mechanical release structure (4) includes a carrier buckle (45), and the connecting rod (42) drives the latch (43) to move through the carrier buckle (45), thereby unlocking the latch (43).

3. The mechanical tripping type fast circuit breaker according to claim 2, characterized in that... The latch (43) is provided with a hook (431), which is connected to the striking member (3) and limits the striking member (3) when the latch (43) is in the first position.

4. The mechanical tripping type fast circuit breaker according to claim 2, characterized in that... The buckle (45) is provided with a top block (451), and the latch (43) is provided with a clearance hole (432). The top block (451) abuts against the latch (43) and keeps the latch (43) in its first position.

5. A mechanically tripped fast circuit breaker according to claim 2, characterized in that... The release frame (41) is provided with a receiving cavity (411), the latch (43) is provided in the receiving cavity (411), the connecting rod (42) includes a first drive plate (421) and a second drive plate (422), the connecting rod (42) is inserted into the receiving cavity (411) and slides horizontally with the release frame (41), the second drive plate (422) is provided with an unlocking part (423), the unlocking part (423) causes the latch (43) to rotate relative to the release frame (41) through the buckle (45) and causes the latch (43) to unlock the striking member (3).

6. A mechanically tripped fast circuit breaker according to claim 5, characterized in that... The buckle (45) and the latch (43) are both hinged to the release frame (41). The first drive plate (421) and the second drive plate (422) are arranged in an L-shape. The release frame (41) is provided with a limiting shaft (412). The unlocking part (423) pushes the lower part of the buckle (45) to make the latch (43) rotate relative to the release frame (41) to unlock the striking part (3).

7. A mechanically tripped fast circuit breaker according to claim 1, characterized in that... The elastic element (44) includes a torsion spring and / or a tension spring, which is connected to the striking element and has a driving force for the striking element (3) to tend to its second position; the striking element (3) is provided with a striking part (31) for pushing the firing pin (7) to move and an arc-shaped part (32) for driving the latch (43) to rotate and lock the striking element (3).

8. A mechanically tripped fast circuit breaker according to claim 1, characterized in that... Also includes: Conductor bus (5), used for circuit conduction; The protection device (6) is located on the circuit of the busbar (5) and is used for overload and / or short circuit protection; the protection device (6) moves the latch (43) from the first position to the second position by pushing the connecting rod (42).

9. A mechanically tripped fast circuit breaker according to claim 8, characterized in that... The protection device (6) includes a short-circuit protection mechanism (61) and an overload protection mechanism (62). Both the short-circuit protection mechanism (61) and the overload protection mechanism (62) are provided with push blocks (63) for pushing the connecting rod (42) to move. The distance between the push block (63) and the connecting rod (42) is adjustable.

10. A mechanically tripped fast circuit breaker according to claim 8, characterized in that... The striking element (3) is connected to the fire generator (2) via the striking pin (7) and causes the fire generator (2) to operate to cut off the circuit at the conductive busbar (5) when the striking element (3) is in the second position.

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