Active circuit breaker assembly, motor controller, electric motor assembly, and vehicle

Abstract

The application discloses an active circuit breaker assembly, a motor controller, an electric assembly and a vehicle. The active circuit breaker assembly comprises a first conductive sheet and an initiating device. A first side of the first conductive sheet is provided with a first gap and a second gap. The first conductive sheet forms a first necking section corresponding to the first gap and a second necking section corresponding to the second gap. The initiating device has a punch for impacting the first necking section and a connecting section, so that the first necking section is fractured, and the second necking section serves as a rotation fulcrum of the connecting section. The size of the first gap in a first direction is greater than the thickness of the first necking section in a third direction, and the first direction, the second direction and the third direction intersect with each other. By optimizing the structural design of the first conductive sheet and cooperating with the impact of the punch on the first necking section and the connecting section, the process requirement of blanking forming is met while ensuring reliable disconnection of the first conductive sheet, the machining process is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of motor controller technology, and more particularly to an active circuit breaker assembly, a motor controller, an electric powertrain, and a vehicle. Background Technology

[0002] An active circuit breaker is an electrical protection device. When the circuit is abnormal or under specific preset conditions, its detonation device (such as pyrotechnic or electromagnetic type) can be quickly triggered, driving the punch to strike the conductive plate at high speed, causing it to break instantly at the preset weak point, thereby physically cutting off the current.

[0003] In related technologies, the conductive strips of active circuit breakers are generally designed to form weak areas by creating notches in the strip body. The size of these notches in the direction of extension of the conductive strip is usually smaller than the thickness of the strip body. Due to this dimensional limitation, the notches cannot be formed in one blanking process using conventional punching dies. They can only be formed by secondary processing, such as subsequent machining or even laser cutting. This results in cumbersome processes, high costs, and is not conducive to cost reduction and efficiency improvement in mass production. Utility Model Content

[0004] This application provides an active circuit breaker assembly, a motor controller, an electric powertrain, and a vehicle, which, while ensuring reliable disconnection of the first conductive sheet, meets the process requirements of stamping and forming, reduces processing steps, and lowers mass production costs, thereby at least partially solving the aforementioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an active circuit breaker assembly is provided, comprising:

[0006] A first conductive sheet extends along a first direction and has a first side and a second side disposed opposite to each other in a second direction. The first side is provided with a first notch and a second notch spaced apart in the first direction. The first conductive sheet forms a first necked section corresponding to the first notch and a second necked section corresponding to the second notch. In the first direction, the first conductive sheet includes a first segment, a first necked section, a connecting segment, a second necked section, and a second segment connected in sequence.

[0007] The detonation device has a punch located on the second side away from the first side. The punch is used to strike the first necked section and the connecting section to break the first necked section, and the second necked section serves as the fulcrum of rotation of the connecting section.

[0008] Wherein, the size of the first notch in the first direction is greater than the thickness of the first necked section in the third direction, and the first direction, the second direction and the third direction intersect each other.

[0009] Optionally, the dimension of the first notch in the first direction is between 2.5 mm and 8 mm; and / or,

[0010] The size of the first notch in the first direction is greater than or equal to 1.2 times the thickness of the first necked section in the third direction, and less than the size of the punch in the first direction.

[0011] Optionally, the first segment has a first sidewall facing the connecting segment, the connecting segment has a second sidewall facing the first segment, and the first necking segment has a connecting wall connecting the first sidewall and the second sidewall, the connecting wall extending obliquely away from the first sidewall in the direction facing the first segment.

[0012] Optionally, the angle between the connecting wall and the first direction is between 20° and 60°.

[0013] Optionally, in the second direction, the minimum size of the first necked section is less than 2 mm.

[0014] Optionally, in the second direction, the minimum size of the first necked section is smaller than the minimum size of the second necked section.

[0015] Optionally, in the first direction, the connecting segment includes an impact portion, a clearance portion, and a main body portion connected in sequence. The impact portion is connected to the first necking segment. The clearance portion has a third notch on the side opposite to the first side. The third notch is used to clearance the punch so that the punch can impact the impact portion and the first necking segment.

[0016] Optionally, the first segment has a fourth notch on the side facing the connecting segment.

[0017] Optionally, the first conductive sheet further includes an additional segment extending from the second segment. In the second direction, the additional segment is spaced apart from both the connecting segment and the second necked segment. The additional segment is located on the side of the second necked segment opposite to the second side, and is used to limit the rotational displacement of the connecting segment.

[0018] Optionally, the additional segment has a fifth notch in a direction away from the second segment, and a deformable portion is formed between the fifth notch and the second notch.

[0019] Optionally, the connecting segment is curved on the side away from the second side, and the curved surface protrudes in the direction away from the second side.

[0020] Optionally, the active circuit breaker assembly further includes a fuse connected between the first segment and the second segment, for carrying all current and disconnecting the circuit after the first necked segment breaks.

[0021] Optionally, the active circuit breaker assembly further includes an insulating base, on which both the first conductive sheet and the detonation device are mounted.

[0022] Optionally, a portion of the first conductive sheet is embedded in the insulating base, the insulating base having a hollowed-out area to expose the first notch.

[0023] Optionally, one of the insulating base and the detonating device is provided with a first positioning hole, and the other is provided with a first positioning post. The first positioning post cooperates with the first positioning hole to position the detonating device on the insulating base.

[0024] Optionally, the active circuit breaker assembly further includes a detection element, the detection element having a detection post, one of the insulating base and the detection element having a second positioning hole, and the other having a second positioning post, the second positioning post cooperating with the second positioning hole, the detection post being used to insert into the first notch.

[0025] Optionally, two first conductive sheets are provided, and the two first conductive sheets are spaced apart along the second direction;

[0026] The detonation device is disposed between the two first conductive plates, and the detonation device includes two punches, which are respectively used to strike the two first conductive plates.

[0027] Optionally, the detection element of the active circuit breaker assembly is provided with two detection posts, each of which is used to insert into one of the two first notches.

[0028] Optionally, the active circuit breaker assembly further includes a second conductive piece located between the two first conductive pieces and arranged in the third direction with the detonation device.

[0029] According to a second aspect of this application, a motor controller is provided, including an active circuit breaker assembly as described in any of the above claims.

[0030] According to a third aspect of this application, an electric powertrain is provided, including a motor and a motor controller as described above.

[0031] According to a fourth aspect of this application, a vehicle is provided, including the electric powertrain described above.

[0032] In the active circuit breaker assembly of this application embodiment, a first notch and a second notch are provided on the first side of the first conductive sheet, forming a first necked section and a second necked section respectively. This allows the first conductive sheet to fracture at a single point at the first necked section when the punch of the detonating device impacts the first necked section and the connecting section from the second side. Simultaneously, the connecting section rotates and swings around the second necked section as a fulcrum, thus avoiding multi-point fracture, preventing conductive fragments from flying, and ensuring the reliability of the disconnection action. Furthermore, by designing the size of the first notch in the extension direction (first direction) of the first conductive sheet to be larger than the size of the first necked section in the thickness direction (third direction), the first notch can be formed in one step using a conventional blanking die, eliminating the need for subsequent machining or laser cutting. In summary, by optimizing the structural design of the first conductive sheet and coordinating the impact of the punch on the first necked section and the connecting section, the reliable disconnection of the first conductive sheet is ensured while meeting the process requirements of blanking, reducing processing steps, and lowering mass production costs.

[0033] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0036] Figure 1 This is a perspective view of an active circuit breaker assembly provided in an exemplary embodiment of this disclosure;

[0037] Figure 2 yes Figure 1 A front view of the active circuit breaker assembly in the diagram;

[0038] Figure 3 yes Figure 1 A bottom view of the active circuit breaker assembly in the diagram;

[0039] Figure 4 yes Figure 1 A rear view schematic diagram of the active circuit breaker assembly in the diagram;

[0040] Figure 5 yes Figure 2 A partial structural diagram of the active circuit breaker assembly in the diagram;

[0041] Figure 6 yes Figure 5 A schematic diagram of the structure of the first conductive sheet in the middle;

[0042] Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the image;

[0043] Figure 8 yes Figure 6 An enlarged schematic diagram of another labeled state of local A in the image;

[0044] Figure 9 yes Figure 2 A schematic diagram illustrating the working principle of the punch and the first conductive piece in the active circuit breaker assembly.

[0045] Figure 10 yes Figure 1 A three-dimensional schematic diagram of the detonation device from another perspective;

[0046] Figure 11 This is a partial three-dimensional schematic diagram of the active circuit breaker assembly provided in an exemplary embodiment of this disclosure;

[0047] Figure 12 yes Figure 11 A three-dimensional schematic diagram of the test piece from another perspective.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100. Active circuit breaker assembly; 10. First conductive sheet; 101. First side; 102. Second side; 11. First notch; 12. Second notch; 13. Third notch; 14. Fourth notch; 15. Fifth notch; 1. First section; 2. First necking section; 3. Connecting section; 31. Impact part; 32. Avoidance part; 33. Main body; 4. Second necking section; 5. Second section; 6. Additional section; 61. Deformable part; 111. First side wall; 112. Second side wall; 113. Connecting wall; 20. Detonating device; 201. Punch; 202. First positioning post; 30. Safety device; 40. Insulating base; 401. First positioning hole; 402. Second positioning hole; 50. Detection element; 501. Second positioning post; 502. Detection post; 60. Second conductive sheet. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0051] Please see Figures 1 to 4 This application provides an active circuit breaker assembly 100, which includes a first conductive sheet 10 and an ignition device 20.

[0052] Please see Figures 5 to 7 The first conductive sheet 10 extends along a first direction and has a first side 101 and a second side 102 disposed opposite each other in a second direction. The first side 101 has a first notch 11 and a second notch 12 spaced apart in the first direction. The first conductive sheet 10 forms a first necked section 2 corresponding to the first notch 11 and a second necked section 4 corresponding to the second notch 12. In the first direction, the first conductive sheet 10 includes a first segment 1, a first necked section 2, a connecting segment 3, a second necked section 4, and a second segment 5 connected in sequence. The detonating device 20 has a punch 201, which is disposed on the side of the second side 102 opposite to the first side 101. The punch 201 is used to strike the first necked section 2 and the connecting segment 3 (see...). Figure 9 ), so that the first necked segment 2 breaks, and the second necked segment 4 serves as the pivot point for the rotation of the connecting segment 3; wherein, the dimension of the first notch 11 in the first direction (see Figure 8 a) is greater than the thickness of the first necked segment 2 in the third direction, and the first direction, the second direction and the third direction intersect each other.

[0053] In the technical solution of this application, a first notch 11 and a second notch 12 are provided on the first side 101 of the first conductive sheet 10, forming a first necked section 2 and a second necked section 4, respectively. This allows the first conductive sheet 10 to fracture at a single point at the first necked section 2 when the punch 201 of the detonating device 20 impacts the first necked section 2 and the connecting section 3 from the second side 102. Simultaneously, the connecting section 3 rotates and swings around the second necked section 4 as a fulcrum, thereby avoiding multi-point fracture, preventing conductive fragments from flying, and ensuring the reliability of the disconnection action. Furthermore, by designing the size of the first notch 11 in the extension direction (first direction) of the first conductive sheet 10 to be larger than the size of the first necked section 2 in the thickness direction (third direction), the first notch 11 can be formed in one step using a conventional punching die, without the need for subsequent secondary processing such as machining or laser cutting. In summary, by optimizing the structural design of the first conductive sheet 10 and coordinating the impact of the punch 201 on the first necking section 2 and the connecting section 3, the process requirements of punching and forming are met while ensuring the reliable disconnection of the first conductive sheet 10, reducing processing steps and lowering mass production costs.

[0054] In this disclosure, the first direction, the second direction, and the third direction are three distinct spatial directions. The first direction intersects the second direction, the second direction intersects the third direction, and the third direction intersects the first direction, collectively forming a reference coordinate system in three-dimensional space. In some embodiments, the first direction, the second direction, and the third direction are mutually perpendicular, corresponding to the length direction, width direction, and thickness direction of the first conductive sheet 10, respectively.

[0055] Please see Figure 7 and Figure 8 In some embodiments, the dimension of the first notch 11 in the first direction (see...) Figure 8 a) is between 2.5 mm and 8 mm. In these embodiments, the dimension of the first notch 11 in the first direction is greater than or equal to 2.5 mm, which helps to ensure that its dimension is greater than the thickness of the first necked section 2 in the third direction, thus meeting the process requirements of stamping and forming and avoiding secondary processing. If the dimension of the first notch 11 in the first direction is too large, the effective length of the first necked section 2 in the extension direction of the first conductive sheet 10 will increase accordingly, and its structural feature will change from a preset weak area with a concentrated stress field to a slender structure with a large length-to-width ratio. This will result in the following: When the punch 201 impacts, the slender structure preferentially undergoes elastic bending rather than brittle shearing, requiring additional energy to overcome the bending deformation work. This not only reduces the certainty and speed of fracture but also requires the detonating device 20 to provide a larger stroke and impact energy. Furthermore, the residual stiffness after fracture is insufficient, potentially leading to secondary bending or tearing, disrupting the smooth swing of the connecting section 3 around the second necked section 4 as a single rotational fulcrum, thus losing the design intent of single-point fracture-controlled swing and increasing the risk of splashing. Simultaneously, the resistance of the slender structure increases significantly due to its increased length, leading to increased heat generation during normal operation, affecting the continuous current-carrying capacity of the first conductive sheet 10 and the overall reliability of the system. Therefore, controlling the upper limit of the size to within 8mm ensures that the first necked section 2 remains short and possesses the weak characteristic of stress concentration, achieving low-energy, highly certain brittle shear breakage, ensuring operational reliability and system safety.

[0056] Please see Figure 8 and Figure 9 In some embodiments, the dimension of the first notch 11 in the first direction (see...) Figure 8 a) is greater than or equal to 1.2 times the thickness of the first necked section 2 in the third direction, and less than the dimension of the punch 201 in the first direction (i.e., Figure 9(The diameter of the punch 201). In these embodiments, the size of the first notch 11 is not less than 1.2 times the thickness of the first necked section 2, which exceeds the minimum size threshold for blanking in one step using conventional blanking dies. This ensures that the first notch 11 can be directly formed through the blanking process without subsequent machining or laser cutting, significantly reducing manufacturing costs and process complexity. At the same time, the size of the first notch 11 is smaller than the size of the punch 201 in the first direction, so that the punch 201 can cover the first necked section 2 more completely when triggered and act on the connecting section 3 simultaneously, efficiently transferring the impact energy to the preset area, driving the first necked section 2 to undergo brittle shear fracture, avoiding bending-tensile ductile fracture or incomplete fracture caused by local stress, and enabling the connecting section 3 to swing with the second necked section 4 as the only rotation fulcrum, effectively preventing the splashing of conductive fragments caused by secondary bending or multi-point fracture. Therefore, this size range achieves the dual goals of one-step blanking and low-energy, high-speed, splash-free reliable disconnection, taking into account both mass production economy and functional safety.

[0057] Please see Figure 7 and Figure 8 In some embodiments, the first segment 1 has a first sidewall 111 facing the connecting segment 3, the connecting segment 3 has a second sidewall 112 facing the first segment 1, and the first necked segment 2 has a connecting wall 113 connecting the first sidewall 111 and the second sidewall 112. The connecting wall 113 extends obliquely away from the first sidewall 101 in the direction facing the first segment 1. In these embodiments, the oblique connecting wall 113 causes the first necked segment 2 to form a structure that gradually narrows along the extension direction of the first conductive sheet 10, with its width (dimension in the second direction) being the smallest at the end near the first segment 1, thus forming a predetermined stress concentration area. When the punch 201 acts on the first necked section 2 and the connecting section 3, the impact load causes the stress to concentrate rapidly in the stress concentration area, causing the first conductive sheet 10 to undergo brittle shear fracture at that position, achieving low-energy, highly deterministic single-point disconnection; after the fracture, the connecting section 3 rotates and swings around the second necked section 4, the electrical clearance increases rapidly, and the fracture surface is flat, without burrs or secondary tearing, effectively preventing conductive fragments from splashing, thereby optimizing the action response speed and system safety while ensuring the reliability of disconnection.

[0058] Please see Figure 8 In some embodiments, the angle between the connecting wall 113 and the first direction (see...) Figure 8(b) The angle is between 20° and 60°. In these embodiments, when the included angle is less than 20°, the connecting wall 113 is too gentle (close to being parallel to the first direction), the width variation of the first necked section 2 along the extension direction is insufficient, the stress concentration effect is weakened, resulting in increased energy required for fracture and delayed disconnection response; when the included angle is greater than 60°, the connecting wall 113 tends to be perpendicular to the first direction, making the size of the first notch 11 in the extension direction too small, which not only makes it difficult to stably form through the punching process, but also makes the transition of the first necked section 2 too sharp, which is prone to accidental fracture due to excessive stress concentration under normal working conditions, and may cause unexpected tearing or burrs under impact load, affecting the reliability of disconnection. Controlling the included angle between 20° and 60° can form a wedge-shaped necked structure with sufficient length and reasonable gradient, ensuring low-energy, highly deterministic brittle shear fracture at a preset position, while taking into account manufacturability and reliability.

[0059] Please see Figure 8 In some embodiments, in the second direction, the minimum dimension of the first necked section 2 (see...) Figure 8 c) less than 2mm. In these embodiments, by controlling the dimension of the first necked section 2 in the second direction to be sufficiently small, its effective load-bearing cross-sectional area can be significantly reduced, causing it to preferentially undergo brittle shear fracture under the impact of the punch 201, thereby achieving a low-energy, highly deterministic, and reliable breakage. The minimum dimension refers to the minimum width value of the first necked section 2 in the second direction within the range extending along the first direction. When the width of the first necked section 2 is constant, this minimum dimension is its constant width; when the width of the first necked section 2 varies along the first direction, this minimum dimension is the width at its narrowest point.

[0060] It should be noted that the structural designs of the first notch 11 and the second notch 12 are based on different functional requirements. The first notch 11 is used to form the first necked segment 2 that fractures under impact, and therefore typically has a longer extension dimension in the second direction and a smaller extension dimension in the first direction, resulting in a slender structure and difficulties in processing. On the other hand, the second notch 12 is used to form the swing fulcrum of the connecting segment 3, causing the second necked segment 4 to bend and deform without fracture. Therefore, its extension dimension in the second direction can be shorter, and its dimension in the first direction can be set relatively larger, resulting in a shallow and wide notch structure, which is easier to process.

[0061] Please see Figure 8 In some embodiments, in the second direction, the minimum dimension of the first necked section 2 (see...) Figure 8 c) is smaller than the minimum dimension of the second necked segment 4 (see Figure 8(d) In these embodiments, by making the first necked section 2 narrower than the second necked section 4, the position of the first necked section 2 as a pre-designated weak area is further strengthened, ensuring that under the impact of the punch 201, the fracture behavior preferentially and definitively occurs in the first necked section 2, while the second necked section 4 mainly undertakes the functions of bending deformation and supporting sway. This dimensional relationship effectively avoids fracture position deviation or accidental damage to the second necked section 4 due to unclear stress distribution, improving the action certainty and overall reliability of the disconnection mechanism.

[0062] Please see Figure 9 In some embodiments, in the first direction, the connecting segment 3 includes an impact part 31, a avoidance part 32, and a main body part 33 connected in sequence. The impact part 31 connects to the first necking segment 2. The avoidance part 32 has a third notch 13 on the side opposite to the first side 101. The third notch 13 is used to avoid the punch 201, so that the punch 201 can impact the impact part 31 and the first necking segment 2. In these embodiments, by providing the third notch 13, the punch 201 avoids the avoidance part 32 during the impact process, thereby concentrating the impact force on the impact part 31 and the first necking segment 2. This ensures that the impact energy is accurately transmitted to the preset fracture position, effectively avoiding energy dispersion caused by the punch 201 contacting other areas of the connecting segment 3, and significantly improving the certainty and response efficiency of the fracture action.

[0063] Please see Figure 6 and Figure 7 In some embodiments, a fourth notch 14 is provided on the side of the first segment 1 facing the connecting segment 3. In these embodiments, the fourth notch 14 is equivalent to a pre-set clearance space on the expected swing path of the connecting segment 3. When the first necked segment 2 breaks, the connecting segment 3 swings outward with the second necked segment 4 as the fulcrum. Its fracture edge may be slightly elongated due to stretching, and the connecting segment 3 itself may also undergo elastic-plastic deformation. If there is insufficient clearance space, the swing end is prone to mechanical interference with the side wall of the first segment 1, resulting in a limited swing angle, insufficient electrical clearance, secondary compression of the fracture surface to produce burrs or metal fragments, increasing the risk of splashing, and triggering additional impact reaction force, affecting the disconnection response speed. The presence of the fourth notch 14 effectively eliminates the above-mentioned interference risks, ensuring that the connecting segment 3 can smoothly and unimpededly complete the swinging action, thereby achieving fast, clean, and reliable single-point disconnection.

[0064] Please see Figure 6 and Figure 7In some embodiments, the first conductive sheet 10 further includes an additional section 6 extending from the second section 5. In the second direction, the additional section 6 is spaced apart from both the connecting section 3 and the second necked section 4. The additional section 6 is located on the side of the second necked section 4 opposite to the second side 102, and is used to limit the rotational displacement of the connecting section 3. In these embodiments, the additional section 6 acts as a mechanical stop, contacting the connecting section 3 when it swings outward, limiting its maximum rotation angle, preventing collisions or short circuits with adjacent structures due to excessive swing amplitude, ensuring reliable establishment of electrical clearance, and improving the controllability of the disconnection action and system safety.

[0065] Please see Figure 6 and Figure 7 In some embodiments, the additional segment 6 has a fifth notch 15 in the direction away from the second segment 5, and a deformable portion 61 is formed between the fifth notch 15 and the second notch 12. In these embodiments, the deformable portion 61 is located on the outward swing path of the connecting segment 3. As a buffer structure, when the first necked segment 2 breaks and the connecting segment 3 swings outward with the second necked segment 4 as the fulcrum, the connecting segment 3 will contact the deformable portion 61 and apply a thrust, causing the deformable portion 61 to deform. This process absorbs the residual kinetic energy of the connecting segment 3, buffers and unloads its swing speed, effectively suppresses the excessive swing amplitude of the connecting segment 3, thereby smoothly terminating the swing action of the connecting segment 3, preventing rebound, vibration or structural damage caused by rigid collision, and improving the controllability of the disconnection process and the stability of the system.

[0066] Please see Figure 6 and Figure 7 In some embodiments, the connecting segment 3 is curved on the side facing away from the second side 102, with the curved surface protruding in the direction away from the second side 102. In these embodiments, the connecting segment 3 gradually narrows from the middle towards both ends, connecting the first necked segment 2 and the second necked segment 4, forming a transition shape that is wider in the middle and narrower at both ends. This outwardly convex curved surface provides a smooth transition, reducing sharp geometric abrupt changes. During the blanking process, this smooth transition helps to disperse stress concentration at the die cutting edge, reducing die cutting edge wear and material tearing, and improving forming accuracy and edge quality. During use, this structure can optimize the stress transmission path, avoiding excessive stress concentration at corners, thereby improving structural stability and fatigue resistance.

[0067] Please see Figure 5 and Figure 6In some embodiments, the active circuit breaker assembly 100 further includes a fuse 30 connected between the first segment 1 and the second segment 5, for carrying all current and disconnecting the circuit after the first necked-out segment 2 breaks. In these embodiments, the first conductive piece 10 is broken at the first necked-out segment 2, the circuit on the first conductive piece 10 is disconnected, and the fuse 30 connected in parallel carries all current, so that the electromotive force at the break point of the first conductive piece 10 is small at the moment of breakage, which cannot break down the air, thereby achieving the arc extinguishing effect; thereafter, the fuse 30 disconnects the circuit, completely achieving the circuit breaking effect.

[0068] It is understandable that the disconnection action of the fuse 30 is delayed relative to the disconnection of the first conductive piece 10, and this delay is sufficient to cover the entire process from the initial cutting to complete disconnection of the first conductive piece 10. During this period, the fuse 30 remains conductive, keeping the voltage across the break in the first conductive piece 10 at a low level, preventing air breakdown and thus achieving an arc-extinguishing effect. After the first conductive piece 10 is completely disconnected, the fuse 30 disconnects again, ultimately completing the complete isolation of the circuit. This application does not limit the specific type of fuse 30. The fuse 30 can be a fusible fuse 30, in which, after the first conductive piece 10 disconnects, the fusible fuse 30 carries the entire current, heats up and melts, disconnecting the circuit. The fuse 30 can also be a flexible hinge fuse 30, in which, after the first conductive piece 10 disconnects, the flexible hinge fuse 30 carries the entire current and rapidly heats up and anneals, releasing prestress, physically breaking, and disconnecting the circuit.

[0069] In some other embodiments, arc extinguishing is achieved without relying on the conduction and delayed disconnection of the safety device 30, but rather by employing other arc extinguishing methods. For example, the break is encapsulated in a vacuum or a miniature cavity filled with inert gas, suppressing arc generation by reducing the gas molecule density or increasing the dielectric strength; or a magnetic blowout coil is placed next to the break, using the Lorentz force to rapidly elongate and cool the arc, thus extinguishing it.

[0070] Please see Figures 1 to 4 In some embodiments, the active circuit breaker assembly 100 further includes an insulating base 40, on which the first conductive sheet 10 and the detonation device 20 are both mounted. In these embodiments, the insulating base 40 integrates the first conductive sheet 10 and the detonation device 20 into one unit, facilitating overall installation while providing insulation and improving the electrical safety of the assembly.

[0071] Please see Figure 2In some embodiments, a portion of the first conductive sheet 10 is embedded in an insulating base 40, which has a hollowed-out area to expose the first notch 11. In these embodiments, embedding the first conductive sheet 10 partially into the insulating base 40 helps to fix its position and prevent it from shifting or flying off during triggering; at the same time, exposing the first notch 11 through the hollowed-out area facilitates the inspection or testing of the processing quality and morphology of the first notch 11 during production or maintenance, ensuring that it meets design requirements.

[0072] Please see Figure 10 and Figure 11 In some embodiments, one of the insulating base 40 and the detonating device 20 is provided with a first positioning hole 401, and the other is provided with a first positioning post 202. The first positioning post 202 cooperates with the first positioning hole 401 to position the detonating device 20 on the insulating base 40. In these embodiments, the cooperation between the first positioning post 202 and the first positioning hole 401 enables rapid alignment and installation between the detonating device 20 and the insulating base 40, improving assembly efficiency.

[0073] Please see Figure 11 and Figure 12 In some embodiments, the active circuit breaker assembly 100 further includes a detection element 50. The detection element 50 has a detection post 502. One of the insulating base 40 and the detection element 50 has a second positioning hole 402, and the other has a second positioning post 501. The second positioning post 501 cooperates with the second positioning hole 402, and the detection post 502 is used to insert into the first notch 11. In these embodiments, when the second positioning post 501 is in place with the second positioning hole 402, the detection post 502 can be inserted into the first notch 11, indicating that the size and position of the first notch 11 meet the requirements, and at the same time verifying that the installation position of the first conductive sheet 10 on the insulating base 40 is correct. By using the detection element 50 to inspect the product, qualified products can be directly determined to meet the quality requirements; for products that fail the inspection, professional precision testing equipment can be used for secondary confirmation. In mass production, the detection element 50 can be used to quickly screen all products, reducing the risk of defective products flowing out due to insufficient sampling, while reducing reliance on professional testing equipment, saving testing resources, and reducing overall testing costs.

[0074] It is understandable that when the first conductive sheet 10 and the detonating device 20 are correctly installed on the insulating base 40, their relative positions are guaranteed, thereby ensuring that the punch 201 of the detonating device 20 can accurately act on the preset area of ​​the first conductive sheet 10 to achieve a reliable impact.

[0075] In some embodiments, the insulating base 40 is provided with a common positioning structure, which is used to cooperate with the detonating device 20 and the detection element 50 respectively; wherein, when the common positioning structure is a common positioning hole, it is used to cooperate with the first positioning post 202 of the detonating device 20 and the second positioning post 501 of the detection element 50 respectively (i.e., Figure 11 (The first positioning hole 401 and the second positioning hole 402 are the same positioning hole); when the common positioning structure is a common positioning post, it is used to insert the first positioning hole 401 of the detonating device 20 and the second positioning hole 402 of the detection piece 50, respectively. In these embodiments, by setting a common positioning structure, the number of independent molding features on the insulating base 40 is reduced, the mold design is simplified, the manufacturing complexity is reduced, and mass production is facilitated.

[0076] Please see Figures 1 to 4 In some embodiments, two first conductive sheets 10 are provided, and the two first conductive sheets 10 are spaced apart along a second direction; the detonating device 20 is disposed between the two first conductive sheets 10, and the detonating device 20 includes two punches 201, which are respectively used to strike the two first conductive sheets 10. In these embodiments, by providing two first conductive sheets 10 and two punches 201, two circuits can be cut off simultaneously, thus expanding the applicability of the active circuit breaker assembly 100.

[0077] Please see Figure 11 and Figure 12 In some embodiments, the detection element 50 of the active circuit breaker assembly 100 is provided with two detection posts 502, which are respectively used to insert into two first notches 11. In these embodiments, by providing two detection posts 502, the first notches 11 on the two first conductive sheets 10 can be detected accordingly, ensuring that their size and position meet the requirements.

[0078] Please see Figures 1 to 3 In some embodiments, the active circuit breaker assembly 100 further includes a second conductive piece 60 located between two first conductive pieces 10 and arranged with the detonating device 20 in a third-direction upward orientation. In these embodiments, by providing the second conductive piece 60, the third phase of a three-phase circuit can be connected. The two first conductive pieces 10 are used to disconnect two phases. The second conductive piece 60 and the detonating device 20 are positioned in a second direction between the two first conductive pieces 10 and arranged in a third-direction upward orientation, resulting in a compact overall structure that facilitates space utilization.

[0079] According to a second aspect of this application, a motor controller is provided, which includes the aforementioned active circuit breaker assembly 100. The motor controller has all the beneficial effects of the aforementioned active circuit breaker assembly 100, which will not be repeated here.

[0080] According to a third aspect of this application, an electric powertrain is provided, which includes a motor and the aforementioned motor controller. The electric powertrain has all the beneficial effects of the aforementioned motor controller, which will not be repeated here.

[0081] According to a fourth aspect of this application, a vehicle is provided that includes the aforementioned electric powertrain, and the vehicle has all the beneficial effects of the aforementioned electric powertrain, which will not be repeated here.

[0082] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0083] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0086] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An active circuit breaker assembly, characterized in that, include: A first conductive sheet extends along a first direction and has a first side and a second side disposed opposite to each other in a second direction. The first side is provided with a first notch and a second notch spaced apart in the first direction. The first conductive sheet forms a first necked section corresponding to the first notch and a second necked section corresponding to the second notch. In the first direction, the first conductive sheet includes a first segment, a first necked section, a connecting segment, a second necked section, and a second segment connected in sequence. The detonation device has a punch located on the second side away from the first side. The punch is used to strike the first necked section and the connecting section to break the first necked section, and the second necked section serves as the fulcrum of rotation of the connecting section. Wherein, the size of the first notch in the first direction is greater than the thickness of the first necked section in the third direction, and the first direction, the second direction and the third direction intersect each other.

2. The active circuit breaker assembly according to claim 1, characterized in that, The dimension of the first notch in the first direction is between 2.5 mm and 8 mm; and / or, The size of the first notch in the first direction is greater than or equal to 1.2 times the thickness of the first necked section in the third direction, and less than the size of the punch in the first direction.

3. The active circuit breaker assembly according to claim 1, characterized in that, The first segment has a first sidewall facing the connecting segment, the connecting segment has a second sidewall facing the first segment, and the first necked segment has a connecting wall connecting the first sidewall and the second sidewall, the connecting wall extending obliquely away from the first sidewall in the direction facing the first segment.

4. The active circuit breaker assembly according to claim 3, characterized in that, The angle between the connecting wall and the first direction is between 20° and 60°.

5. The active circuit breaker assembly according to claim 1, characterized in that, In the second direction, the minimum size of the first necked section is less than 2 mm.

6. The active circuit breaker assembly according to claim 1, characterized in that, In the second direction, the minimum size of the first necked section is smaller than the minimum size of the second necked section.

7. The active circuit breaker assembly according to claim 1, characterized in that, In the first direction, the connecting segment includes an impact portion, a avoidance portion, and a main body portion connected in sequence. The impact portion is connected to the first necking segment. The avoidance portion has a third notch on the side opposite to the first side. The third notch is used to avoid the punch, so that the punch can impact the impact portion and the first necking segment.

8. The active circuit breaker assembly according to claim 1, characterized in that, The first segment has a fourth notch on the side facing the connecting segment.

9. The active circuit breaker assembly according to claim 1, characterized in that, The first conductive sheet further includes an additional segment extending from the second segment. In the second direction, the additional segment is spaced apart from both the connecting segment and the second necked segment. The additional segment is located on the side of the second necked segment opposite to the second side and is used to limit the rotational displacement of the connecting segment.

10. The active circuit breaker assembly according to claim 9, characterized in that, The additional segment has a fifth notch in a direction away from the second segment, and a deformable portion is formed between the fifth notch and the second notch.

11. The active circuit breaker assembly according to claim 1, characterized in that, The connecting segment is curved on the side away from the second side, and the curved surface protrudes in the direction away from the second side.

12. The active circuit breaker assembly according to claim 1, characterized in that, The active circuit breaker assembly also includes a safety device connected between the first section and the second section, which is used to carry all current and disconnect the circuit after the first necked section breaks.

13. The active circuit breaker assembly according to claim 1, characterized in that, The active circuit breaker assembly also includes an insulating base, on which both the first conductive sheet and the detonation device are mounted.

14. The active circuit breaker assembly according to claim 13, characterized in that, A portion of the first conductive sheet is embedded in the insulating base, which has a hollowed-out area to expose the first notch.

15. The active circuit breaker assembly according to claim 13, characterized in that, One of the insulating base and the detonating device is provided with a first positioning hole, and the other is provided with a first positioning post. The first positioning post cooperates with the first positioning hole to position the detonating device on the insulating base.

16. The active circuit breaker assembly according to claim 13, characterized in that, The active circuit breaker assembly also includes a detection element, which is provided with a detection post. One of the insulating base and the detection element is provided with a second positioning hole, and the other is provided with a second positioning post. The second positioning post cooperates with the second positioning hole, and the detection post is used to insert into the first notch.

17. The active circuit breaker assembly according to any one of claims 1 to 16, characterized in that, Two first conductive sheets are provided, and the two first conductive sheets are spaced apart along the second direction; The detonation device is disposed between the two first conductive plates, and the detonation device includes two punches, which are respectively used to strike the two first conductive plates.

18. The active circuit breaker assembly according to claim 17, characterized in that, The active circuit breaker assembly has two detection posts for inserting into the two first notches.

19. The active circuit breaker assembly according to claim 17, characterized in that, The active circuit breaker assembly further includes a second conductive piece located between the two first conductive pieces and arranged in the third direction with the detonation device.

20. A motor controller, characterized in that, Includes the active circuit breaker assembly as described in any one of claims 1 to 19.

21. An electric powertrain, characterized in that, Includes an electric motor and a motor controller as described in claim 20.

22. A vehicle, characterized in that, Includes the electric powertrain as described in claim 21.

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