Circuit protection module with fracture arc isolation design

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a circuit protection module with a fracture arc isolation design, which comprises a shell provided with a busbar; when external excitation is applied to the driving part, the driving part pushes the punch to move downwards to reach the busbar body, so that the first weak point and the second weak point are broken, the busbar body rotates around the first rotating shaft, and then the first arc isolation block rotates to the side facing the first wiring terminal; therefore, the electric arc between the busbar main body and the first wiring terminal is cut off. A busbar main body is improved, and a rotating shaft and a first arc isolating block are arranged. When the bus-bar main body is impacted and the first weak point and the second weak point are broken, the bus-bar main body rotates around the rotating shaft and enables the first arc isolation block to turn to the first weak point, so that arc isolation of the part is realized, and the problems of uncontrollable deformation condition and unstable arc extinguishing effect of the bus-bar in the prior art are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit protection module with a break arc isolation design. Background Art

[0002] The high voltage scenarios of new energy vehicles and the increasing demand for longer driving range force new energy vehicles to carry larger capacity batteries. During the use of the vehicle, once an accident occurs, the power battery is squeezed and easily explodes, posing a serious threat to the safety of the driver and passengers. The response time of traditional fuse protection is long and uncontrollable, which obviously cannot meet the power protection of new energy vehicles with increasingly high power. Therefore, there is an urgent need for a protection method with a simple structure and high arc extinguishing ability to ensure vehicle safety under high voltage.

[0003] In the prior art, in order to achieve a safer cutting effect, it is usually necessary to perform two processes, cutting off and arc extinguishing, on the circuit.

[0004] For example, Chinese patent 202310122024.3 discloses a circuit cutting device, which includes a busbar, forming a part of the circuit, and a weak point is provided at the break of the busbar; a punch, and one or more notches are provided on the side of the punch close to the busbar, and the weak point is bent to both sides after being broken by the punch; an insulating baffle is provided on the side of the busbar away from the punch, and one or more insulating baffles are provided; after the punch breaks the busbar, the notches and the insulating baffles engage.

[0005] For another example, Chinese patent 202222365106.4 discloses an explosive circuit breaker, comprising: a housing including a first housing and a second housing; a busbar is arranged at the connection between the first housing and the second housing, and a plurality of cutting grooves are provided on the busbar; an impact part is enclosed in the first housing, and a plurality of punches are arranged on the impact part, and the punches are used to cut the cutting grooves; a lifting part is enclosed in the second housing, and a plurality of lifting platforms are arranged at intervals on the lifting part, and the lifting platforms are used to lift the busbar after cutting; the detonating part is connected to the side of the impact part away from the busbar, and the detonating part is configured to allow the impact part to provide thrust after detonation. By arranging a plurality of cutting grooves on the busbar, when the circuit is overcurrent or overvoltage, the busbar can be disconnected at the plurality of cutting grooves, and the power can be cut off in time and the arc can be extinguished quickly, thereby ensuring the safety of the circuit, and the circuit breaker is suitable for circuits of various voltages, especially for high-voltage circuits.

[0006] However, in the actual implementation process, the inventors found that in this type of technical solution, the copper bar is usually naturally bent and broken after the impact part hits the copper bar, and then separated by the impact part. Since the copper bar itself has a low hardness, its bending position and bending degree may not be consistent with the design expectations, resulting in a too small break interval, which in turn leads to problems such as a long arc extinguishing time and incomplete arc extinguishing. Utility Model Content

[0007] In view of the above problems existing in the prior art, a circuit protection module with a fracture arc isolation design is now provided.

[0008] The specific technical solutions are as follows:

[0009] A circuit protection module with a fracture arc isolation design comprises a housing, wherein a busbar is arranged in the housing along a current direction, and the busbar is sequentially provided with a first wiring terminal, a busbar body and a second wiring terminal along the current direction;

[0010] A first weak point is provided between the busbar body and the first wiring terminal, and a second weak point is provided between the busbar body and the second wiring terminal;

[0011] A first arc isolation block is provided below the busbar body on one side close to the first weak point;

[0012] A first rotating shaft is arranged between the busbar body and the first arc isolation block in a horizontal direction, and both ends of the first rotating shaft are connected to the housing;

[0013] A punch is disposed above the busbar body, and a driving part is disposed above the punch;

[0014] When external excitation is applied to the driving part, the driving part pushes the punch downward to reach the bus body, so that the first weak point and the second weak point are broken, and the bus body is rotated around the first rotating axis, and then the first arc isolation block is rotated to the side facing the first terminal to cut off the arc between the bus body and the first terminal.

[0015] On the other hand, a rotating cavity is arranged in the housing along the front view direction, and the rotating cavity includes a first cavity located below the busbar body and a second cavity located above the busbar body;

[0016] In a top view direction, the first cavity and the second cavity are separated by the first rotating shaft;

[0017] The first cavity is fan-shaped, and the radius of the first cavity matches the length from the first rotation axis to the second weak point;

[0018] The second cavity is fan-shaped, and the radius of the second cavity matches the length from the first rotation axis to the first weak point;

[0019] When the punch impacts the busbar body, the busbar body rotates around the first rotation axis along the impact direction until it respectively abuts against the side wall of the first cavity and the side wall of the second cavity.

[0020] On the other hand, the first arc isolation block is semi-cylindrical, and the radius of the first arc isolation block matches the radius of the second cavity;

[0021] A third cavity connected to the second cavity is provided below the busbar body at a position overlapping with the second cavity in a top view, and the third cavity and the second cavity form a semicircular area;

[0022] When the punch impacts the busbar body, the first arc isolation block and the busbar body rotate in the semicircular area;

[0023] When the busbar body stops moving, the first arc isolation block fills the semicircular area.

[0024] On the other hand, the punch is cylindrical, and an impact platform is processed on one side of the punch close to the second weak point;

[0025] The surface of the impact table protrudes from the punch.

[0026] On the other hand, in the housing, a non-return platform is provided below a position corresponding to the second weak point;

[0027] The punch is made of insulating material;

[0028] When the second weak point is broken, the punch moves downward along the shell and causes the impact platform to abut against the anti-return platform to block the arc between the busbar body and the second terminal.

[0029] On the other hand, a third weak point is processed in the middle of the busbar body, and the punch is located above the third weak point;

[0030] A second arc isolation block is provided below the busbar body on one side close to the second weak point;

[0031] A second rotating shaft is arranged between the busbar body and the second arc isolation block in a horizontal direction, and both ends of the second rotating shaft are connected to the housing;

[0032] When the punch impacts the third weak point and breaks the third weak point, the second part of the bus body close to the second rotating shaft rotates around the second rotating shaft, thereby causing the second arc isolation block to rotate to the side facing the second terminal to cut off the arc between the bus body and the second terminal.

[0033] On the other hand, a rotating cavity is arranged in the housing along the front view direction, and the rotating cavity includes a fourth cavity located below the busbar body and a fifth cavity located above the busbar body;

[0034] In a top view direction, the fourth cavity and the fifth cavity are separated by the second rotating shaft;

[0035] When the punch impacts the busbar body, the second part rotates around the second rotation axis along the impact direction until it respectively abuts against the side wall of the fourth cavity and the side wall of the fifth cavity.

[0036] On the other hand, the fifth cavity is fan-shaped, and the radius of the fifth cavity matches the length from the second rotation axis to the second weak point;

[0037] A sixth cavity connected to the fifth cavity is disposed below the second portion and overlapped with the fifth cavity in a top view direction, and the sixth cavity and the fifth cavity form a semicircular area;

[0038] When the punch strikes the busbar body, the second arc isolation block and the second portion rotate in the semicircular area;

[0039] When the busbar body stops moving, the second arc isolation block fills the semicircular area.

[0040] On the other hand, a platform is provided on the bottom surface of the rotating cavity, and when the punch falls, the punch abuts against the platform.

[0041] On the other hand, a volume cavity is provided on one side of the punch close to the driving part;

[0042] When the driving part is stimulated by the external stimulus, the gas is filled into the volume chamber to push the punch to move downward.

[0043] The above technical solution has the following advantages or beneficial effects:

[0044] In view of the problem that the position and bending degree of the copper busbar of the circuit breaker in the prior art may be offset during the breaking process, thereby resulting in poor arc isolation effect, in this solution, the busbar body is improved, and a rotating shaft and a first arc isolation block are provided. When the busbar body is impacted, thereby causing the first weak point and the second weak point to break, the busbar body rotates around the rotating shaft and causes the first arc isolation block to turn to the first weak point, thereby achieving arc isolation at this part, thereby avoiding the problem that the deformation of the busbar is uncontrollable and the arc extinguishing effect is unstable in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The embodiments of the present invention will be described more fully with reference to the attached drawings, which are however only used for illustration and description and are not intended to limit the scope of the present invention.

[0046] Figure 1 It is an external schematic diagram of an embodiment of the utility model;

[0047] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0048] Figure 3 A schematic diagram of a busbar according to an embodiment of the utility model;

[0049] Figure 4 A schematic diagram of the force on the busbar of an embodiment of the utility model;

[0050] Figure 5 This is a schematic diagram of a blocking state of an embodiment of the utility model;

[0051] Figure 6 A schematic diagram of a cavity according to an embodiment of the utility model;

[0052] Figure 7 A schematic diagram of a punch according to an embodiment of the utility model;

[0053] Figure 8 It is a schematic diagram of another embodiment of the utility model. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0056] In the utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0059] The utility model includes:

[0060] A circuit protection module with a break arc isolation design, such as Figure 1 and Figure 2 As shown, it includes a housing 010;

[0061] A busbar 300 is arranged in the housing 010 along the current direction, and the busbar 300 is sequentially arranged with a first wiring terminal 301, a busbar body 303 and a second wiring terminal 302 along the current direction;

[0062] A first weak point 310 is provided between the busbar body 303 and the first terminal 301 , and a second weak point 320 is provided between the busbar body 303 and the second terminal 302 ;

[0063] A first arc-isolating block 600 is disposed below the busbar body 303 on one side close to the first weak point 310;

[0064] A first rotating shaft 700 is disposed between the busbar body 303 and the first arc isolation block 600 along the horizontal direction, and both ends of the first rotating shaft 700 are connected to the housing 010;

[0065] A punch 400 is disposed above the busbar body 303 , and a driving unit 500 is disposed above the punch 400 ;

[0066] When external excitation is applied to the driving part 500, the driving part 500 pushes the punch 400 to move downward to reach the bus body 303, so that the first weak point 310 and the second weak point 320 are broken, and the bus body 303 is rotated around the first rotating shaft 700, and then the first arc-isolating block 600 is rotated to the side facing the first terminal 301, so as to cut off the arc between the bus body 303 and the first terminal 301.

[0067] Specifically, with respect to the circuit breaker in the prior art, the position and bending degree of the copper busbar may shift during the breaking process, thereby leading to the problem of poor arc isolation effect. In the present embodiment, improvements are made to the busbar 300, and a first weak point 310 and a second weak point 320 are respectively provided at both ends of the busbar body 303, which serve as the positions predetermined to be broken after being impacted by the punch 400; accordingly, a rotating shaft is provided under the busbar body 303, so that after the first weak point 310 and the second weak point 320 are broken, the busbar body 303 can rotate around the first rotating shaft 700.

[0068] Based on the above arrangement, when the punch 400 moves downward under the drive of the driving unit 500, the busbar body 303 is impacted on the side close to the second weak point 320, and the second weak point 320 breaks under the pressure, and the busbar body 303 rotates clockwise in the direction shown in the figure, and then drives the first weak point 310 to break under the action of the lever, and one side of the first weak point 310 moves upward, so that the first arc-isolating block 600 below rotates to the side facing the first terminal 301 to extinguish the arc. In this process, the busbar body 303 mainly breaks the first weak point 310 and the second weak point 320 by rotating, and does not rely on deformation to perform circuit breaking and arc extinguishing, thereby achieving a better circuit protection effect.

[0069] In an implementation, the housing 010 includes an upper housing 100 and a lower housing 200 , and the upper housing 100 and the lower housing 200 are combined to form the housing 010 .

[0070] like Figure 3As shown, the busbar 300 is thinned at the positions of the first weak point 310 and the second weak point 320 by stamping or other processes, thereby dividing the busbar 300 into the first terminal 301 and the second terminal 302. Alternatively, three parts may be prepared separately and connected. The first terminal 301 and the second terminal 302 are provided with through holes for easy wiring, which are respectively crimped between the upper shell 100 and the lower shell 200 to fix the busbar 300, and are fixed by the upper shell 100 and the lower shell 200 when broken.

[0071] In order to achieve a more accurate cutting process, the stress condition of the busbar body 303 can also be controlled. Figure 4 As shown, the first rotating shaft 700 is arranged on a side close to the first weak point 310 to form a force-saving lever structure. According to the lever force formula:

[0072] F1l1=F2l2

[0073] In the formula, F1 is the force received by the power end, that is, the impact force transmitted by the punch 400; F2 is the force received by the force-receiving end, that is, the combination force of the first weak point 310 and the combination force of the second weak point 320; l1 is the force arm length of the power end, and l2 is the force arm length of the force-receiving end.

[0074] Under the driving force of the constant driving part 500, the binding force of the first weak point 310 and the binding force of the second weak point 320 can be adjusted by adjusting the force arm length of the power end and the force-bearing end, that is, the minimum cross-sectional area at the first weak point 310 and the second weak point 320 can be adjusted, thereby achieving the adjustable flow capacity I of the protection module, as shown in Table 1.

[0075]

[0076] Table 1

[0077] Furthermore, in order to achieve the arc-isolating effect, the punch 400 and the first arc-isolating block 600 are both made of insulating materials with high voltage resistance, such as LCP, PA66, PA6, etc., to achieve a better arc-extinguishing effect.

[0078] Among them, a volume cavity is provided on one side of the punch 400 close to the driving part 500;

[0079] When the driving part 500 is stimulated externally, gas is filled into the volume chamber to push the punch 400 to move downward.

[0080] The principle of the driving part 500 itself can be changed as needed, for example, it can be realized by using a driving part 500 powered by gunpowder. The driving part 500 is externally connected to a corresponding trigger circuit. When the trigger circuit generates a corresponding trigger signal, the charge in the driving part 500 is detonated, and a large amount of gas is generated to push the punch 400 downward, and finally the state inside the device is as follows: Figure 5 However, it can also be replaced by a device based on high pressure gas power or other principles as required.

[0081] To achieve the above process, the structure inside the shell can be improved as follows to achieve a better arc extinguishing effect.

[0082] Embodiment 1:

[0083] like Figure 6 As shown, in this embodiment, a rotating cavity is provided in the housing 100 along the front view direction, and the rotating cavity includes a first cavity A1 located below the bus body and a second cavity A2 located above the bus body;

[0084] In the top view direction, the first cavity A1 and the second cavity A2 are separated by the first rotating shaft 700;

[0085] The first cavity A1 is fan-shaped, and the radius of the first cavity A1 matches the length from the first rotation axis 700 to the second weak point 320;

[0086] The second cavity A2 is fan-shaped, and the radius of the second cavity A2 matches the length from the first rotation axis 700 to the first weak point 310;

[0087] When the punch 400 impacts the busbar body 303 , the busbar body 303 rotates around the first rotation axis 700 along the impact direction until it abuts against the side wall of the first cavity A1 and the side wall of the second cavity A2 .

[0088] Specifically, in order to achieve a better arc isolation effect, in this embodiment, a rotating cavity for the busbar body 303 to rotate is processed in the housing 100, including a first cavity A1 and a second cavity A2. When the busbar body 303 rotates, the long section swings along the first cavity A1 until it reaches the side wall of the first cavity A1 and stops; the short section swings along the second cavity A2 until it reaches the side wall of the second cavity A2 and stops. This setting is used to limit the rotation direction of the busbar body 303.

[0089] In this embodiment, the first arc isolation block 600 is semi-cylindrical, and the radius of the first arc isolation block 600 matches the radius of the second cavity A2;

[0090] Below the busbar body 303, a third cavity A3 connected to the second cavity A2 is provided at a position overlapping with the second cavity A2 in a top view, and the third cavity A3 and the second cavity A2 form a semicircular area;

[0091] When the punch 400 impacts the busbar body 303, the first arc isolation block 600 and the busbar body 303 rotate in a semicircular area;

[0092] When the busbar body 303 stops moving, the first arc-isolating block 600 fills the semicircular area.

[0093] Specifically, in order to achieve a better arc-isolating effect, the shape of the first arc-isolating block 600 is also adjusted in this embodiment, and a third cavity A3 matching the size of the first arc-isolating block 600 is provided below the busbar body 303. When the busbar body 303 does not rotate, the first arc-isolating block 600 is located in the third cavity A3 and the first cavity A1. When the busbar body 303 rotates, the first arc-isolating block 600 rotates along the semicircular area and fills the semicircular area when the busbar body 303 reaches the side wall of the second cavity A2. In this process, the first arc-isolating block 600 matches the semicircular area to fill the gap, thereby achieving a better arc-extinguishing effect.

[0094] In this embodiment, the punch 400 is cylindrical, and an impact platform 410 is processed on one side of the punch 400 close to the second weak point;

[0095] like Figure 7 As shown, the surface of the impact table 410 protrudes beyond the punch.

[0096] In the housing 010, a non-return platform 210 is provided below the position corresponding to the second weak point;

[0097] When the second weak point is broken, the punch 400 moves downward along the housing and causes the impact platform 410 to abut against the anti-return platform 210 to block the arc between the busbar body 303 and the second connecting terminal 302 .

[0098] Specifically, in order to achieve arc extinguishing on one side of the second terminal 302, in this embodiment, the punch 400 is also selected to be an insulating material, and a backflow prevention platform 210 is provided on the side wall below the position corresponding to the second weak point in the housing 010.

[0099] During the descent of the punch 400, its edge adheres to the inner wall of the shell 010 and descends until it reaches the anti-return platform 210 and stops. At this time, the side wall of the punch 400 blocks the second terminal 302, and a better arc extinguishing effect is achieved through this process.

[0100] Furthermore, in order to achieve a better cutting effect, in this embodiment, an impact platform 410 is processed on one side of the punch 400 close to the second weak point, which is used to provide a smaller surface area so that the area provides a larger pressure and concentrates it at the second weak point to facilitate breaking.

[0101] Embodiment 2:

[0102] In another embodiment, the busbar 300 and the housing 010 may be improved to isolate arcs on both sides.

[0103] like Figure 8 As shown, in this embodiment, a third weak point 330 is further processed in the middle portion of the busbar body 300, and the punch 400 is located above the third weak point 330;

[0104] A first arc-isolating block 601 is disposed below the busbar body 303 on one side close to the first weak point 310;

[0105] A first rotating shaft 701 is disposed between the busbar body 303 and the first arc isolation block 601 along the horizontal direction, and both ends of the first rotating shaft 701 are connected to the housing 010;

[0106] A second arc-isolating block 602 is disposed below the busbar body 300 on one side close to the second weak point 320 ;

[0107] A second rotating shaft 702 is disposed between the busbar body 300 and the second arc isolation block along the horizontal direction, and both ends of the second rotating shaft 702 are connected to the housing 010;

[0108] When the punch 400 impacts the third weak point 330 and breaks the third weak point 330:

[0109] The first part of the busbar body 303 close to the first rotating shaft 701 rotates around the first rotating shaft 701, so that the first arc-isolating block 601 rotates to the side facing the first wiring terminal 301, so as to cut off the arc between the busbar body 303 and the first wiring terminal 301;

[0110] The second portion of the busbar body 300 close to the second rotating shaft 702 rotates around the second rotating shaft 702 , thereby rotating the second arc-isolating block 602 toward the second terminal 302 to cut off the arc between the busbar body 303 and the second terminal 302 .

[0111] Specifically, in order to achieve a better arc extinguishing effect, in this embodiment, the busbar body 303 is improved, a third weak point 330 is set in the middle of the busbar body 303, and corresponding arc isolation blocks are respectively set at the first weak point 310 and the second weak point 320. When the punch 400 impacts downward, the first part and the second part rotate respectively, so that the first arc isolation block 601 rotates to the side facing the first wiring terminal 301, and the second arc isolation block 602 rotates to the side facing the second wiring terminal 302, thereby completing the arc isolation of the broken part of the first wiring terminal 301 and the broken part of the second wiring terminal 302, and achieving a better arc extinguishing effect.

[0112] In this embodiment, a rotating cavity is provided in the housing along the front view direction, and the rotating cavity includes a fourth cavity A4 located below the busbar body 330 and a fifth cavity A5 located above the busbar body;

[0113] It also includes the aforementioned first cavity A1, second cavity A2 and third cavity A3, wherein the specific shape of the first cavity A1 has certain deformation, but its function is the same as that in the first embodiment.

[0114] In the top view direction, the fourth cavity A4 and the fifth cavity A5 are separated by the second rotating shaft 702;

[0115] When the punch 400 impacts the busbar body 303 , the second portion rotates around the second rotation axis 702 along the impact direction until it abuts against the side wall of the fourth cavity A4 and the side wall of the fifth cavity A5 .

[0116] Specifically, in order to achieve a better arc isolation effect, in this embodiment, a similar rotating cavity for the second part of the busbar body 303 to rotate is processed on the side close to the second weak point 320, including the fourth cavity A4 and the fifth cavity A5. When the second part rotates, the long section swings along the fourth cavity A4 until it reaches the side wall of the fourth cavity A4 and stops; the short section swings along the fifth cavity A5 until it reaches the side wall of the fifth cavity A5 and stops. This setting is used to limit the rotation direction of the second part.

[0117] In one embodiment, the fifth cavity A5 is fan-shaped, and the radius of the fifth cavity A5 matches the length from the second rotation axis to the second weak point;

[0118] Below the second portion, a sixth cavity A6 connected to the fifth cavity A5 is provided at a position overlapping with the fifth cavity A5 in a top view, and the sixth cavity A6 and the fifth cavity A5 form a semicircular area;

[0119] When the punch 400 impacts the busbar body 303, the second arc isolation block 602 and the second portion rotate in the semicircular area;

[0120] When the busbar body 303 stops moving, the second arc-isolating block 602 fills the semicircular area.

[0121] Specifically, in order to achieve a better arc-isolating effect, the shape of the second arc-isolating block 602 is also adjusted in this embodiment, and a sixth cavity A6 matching the size of the second arc-isolating block 602 is provided below the second portion of the bus body 303. When the second portion of the bus body 303 does not rotate, the second arc-isolating block 602 is located in the sixth cavity A6 and the fourth cavity A4. When the second portion of the bus body 303 rotates, the second arc-isolating block 602 rotates along the semicircular area, and is filled in the semicircular area when the second portion of the bus body 303 reaches the side wall of the fifth cavity A5. In this process, the second arc-isolating block 602 matches the semicircular area to fill the gap, thereby achieving a better arc-extinguishing effect.

[0122] A platform 220 is disposed on the bottom surface of the rotating cavity. When the punch 400 falls, the punch abuts against the platform 220 .

[0123] Specifically, in order to achieve a better arc extinguishing effect, in this embodiment, a platform 220 is provided below the third weak point 330. When the punch 400 falls, the punch 400 abuts against the platform 220. Since the punch 400 and the platform 220 are both made of insulating materials, the arc generated after the third weak point 330 is broken can be cut off, thereby achieving a better arc extinguishing effect.

[0124] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit protection module with a break arc isolation design, characterized in that: It comprises a housing, wherein a busbar is arranged in the housing along the current direction, and the busbar is sequentially provided with a first wiring terminal, a busbar body and a second wiring terminal along the current direction; A first weak point is provided between the busbar body and the first wiring terminal, and a second weak point is provided between the busbar body and the second wiring terminal; A first arc isolation block is provided below the busbar body on one side close to the first weak point; A first rotating shaft is arranged between the busbar body and the first arc isolation block in a horizontal direction, and both ends of the first rotating shaft are connected to the housing; A punch is disposed above the busbar body, and a driving part is disposed above the punch; When external excitation is applied to the driving part, the driving part pushes the punch downward to reach the bus body, so that the first weak point and the second weak point are broken, and the bus body is rotated around the first rotating axis, and then the first arc isolation block is rotated to the side facing the first terminal to cut off the arc between the bus body and the first terminal.

2. The circuit protection module according to claim 1, characterized in that: A rotating cavity is arranged in the housing along the front view direction, and the rotating cavity includes a first cavity located below the busbar body and a second cavity located above the busbar body; In a top view, the first cavity and the second cavity are separated by the first rotating shaft; The first cavity is fan-shaped, and the radius of the first cavity matches the length from the first rotation axis to the second weak point; The second cavity is fan-shaped, and the radius of the second cavity matches the length from the first rotation axis to the first weak point; When the punch impacts the busbar body, the busbar body rotates around the first rotation axis along the impact direction until it respectively abuts against the side wall of the first cavity and the side wall of the second cavity.

3. The circuit protection module according to claim 2, characterized in that: The first arc isolation block is semi-cylindrical, and the radius of the first arc isolation block matches the radius of the second cavity; A third cavity connected to the second cavity is provided below the busbar body at a position overlapping with the second cavity in a top view, and the third cavity and the second cavity form a semicircular area; When the punch impacts the busbar body, the first arc isolation block and the busbar body rotate in the semicircular area; When the busbar body stops moving, the first arc isolation block fills the semicircular area.

4. The circuit protection module according to claim 1, characterized in that: The punch is cylindrical, and an impact platform is processed on one side of the punch close to the second weak point; The surface of the impact table protrudes from the punch.

5. The circuit protection module according to claim 4, characterized in that: In the housing, a non-return platform is provided below a position corresponding to the second weak point; The punch is made of insulating material; When the second weak point is broken, the punch moves downward along the shell and causes the impact platform to abut against the anti-return platform to block the arc between the busbar body and the second terminal.

6. The circuit protection module according to claim 1, characterized in that: A third weak point is also processed in the middle of the busbar body, and the punch is located above the third weak point; A second arc isolation block is provided below the busbar body on one side close to the second weak point; A second rotating shaft is arranged between the busbar body and the second arc isolation block in a horizontal direction, and both ends of the second rotating shaft are connected to the housing; When the punch impacts the third weak point and breaks the third weak point, the second part of the bus body close to the second rotating shaft rotates around the second rotating shaft, thereby causing the second arc isolation block to rotate to the side facing the second terminal to cut off the arc between the bus body and the second terminal.

7. The circuit protection module according to claim 6, characterized in that: A rotating cavity is arranged in the housing along the front view direction, and the rotating cavity includes a fourth cavity located below the busbar body and a fifth cavity located above the busbar body; In a top view direction, the fourth cavity and the fifth cavity are separated by the second rotating shaft; When the punch impacts the busbar body, the second part rotates around the second rotation axis along the impact direction until it respectively abuts against the side wall of the fourth cavity and the side wall of the fifth cavity.

8. The circuit protection module according to claim 7, characterized in that: The fifth cavity is fan-shaped, and the radius of the fifth cavity matches the length from the second rotation axis to the second weak point; A sixth cavity connected to the fifth cavity is disposed below the second portion and overlapped with the fifth cavity in a top view direction, and the sixth cavity and the fifth cavity form a semicircular area; When the punch strikes the busbar body, the second arc isolation block and the second portion rotate in the semicircular area; When the busbar body stops moving, the second arc isolation block fills the semicircular area.

9. The circuit protection module according to claim 7, characterized in that: The bottom surface of the rotating cavity is provided with a platform, and when the punch falls, the punch abuts against the platform.

10. The circuit protection module according to claim 1, characterized in that: A volume cavity is provided on one side of the punch close to the driving part; When the driving part is stimulated by the external stimulus, the gas is filled into the volume chamber to push the punch to move downward.

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