Circuit breaker, battery and vehicle

Abstract

The utility model provides a circuit breaker, a battery and a vehicle. The circuit breaker comprises a confluence piece and a cut-off arc extinguishing assembly, the cut-off arc extinguishing assembly can move towards the confluence piece to cut off the confluence piece, and the cut-off arc extinguishing assembly can extinguish electric arcs generated by cutting off the confluence piece. In the application, the arc extinguishing part and the cutter move simultaneously, and after the bus piece is cut off, the cut-off arc extinguishing assembly is located at the notch of the cut-off bus piece, so that arc absorption can be completed while the bus piece is cut off, the time difference between the cut-off operation and the arc extinguishing operation is reduced, and the safety performance of the battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicle parts, and particularly to a circuit breaker, a battery, and a vehicle. Background Art

[0002] The function of the circuit breaker is to cut off the power supply when the battery has an abnormality, but the arc generated by cutting off the high-voltage circuit will affect the circuit cutting. Summary of the Utility Model

[0003] This application provides a circuit breaker, a battery, and a vehicle that are conducive to rapid arc extinguishing.

[0004] In a first aspect, an embodiment of this application provides a circuit breaker. The circuit breaker includes a busbar component and a cutting and arc extinguishing component. The cutting and arc extinguishing component can move towards the busbar component to cut off the busbar component, and the cutting and arc extinguishing component can extinguish the arc generated by cutting off the busbar component.

[0005] According to the first aspect, in a possible implementation, the cutting and arc extinguishing component is spaced apart from the busbar component.

[0006] According to the first aspect, in a possible implementation, the cutting and arc extinguishing component includes a connected cutter and an arc extinguishing part. The cutter protrudes towards the busbar component for cutting off the busbar component, and the arc extinguishing part is used for extinguishing the arc generated by cutting off the busbar component.

[0007] According to the first aspect, in a possible implementation, the arc extinguishing part includes a plurality of metal grid sheets spaced apart along the moving direction of the cutting and arc extinguishing component. The plurality of metal grid sheets are arranged on at least one side of the cutter along a first direction, and the first direction is different from the moving direction of the cutting and arc extinguishing component.

[0008] According to the first aspect, in a possible implementation, the circuit breaker further includes a first housing. A first chamber is provided inside the first housing. At least a part of the busbar component is arranged at an opening at one end of the first chamber, and the cutting and arc extinguishing component is movably arranged inside the first chamber.

[0009] According to the first aspect, in a possible implementation, the cutting and arc extinguishing component further includes a base for connecting to the cutter and / or the arc extinguishing part. The base is in sliding contact with the inner wall of the first chamber.

[0010] According to the first aspect, in a possible implementation, the busbar component includes a first part. The first part breaks when the busbar component is cut off. The first part is adapted to cover the opening at one end of the first chamber, and the size of the first part is larger than the cross-sectional size of the first chamber.

[0011] According to the first aspect, in a possible implementation, the strength of the first part is lower than that of the rest of the busbar component, or at least a cutting groove is provided at the edge of the first part.

[0012] According to the first aspect, in a possible implementation, the circuit breaker further includes an igniter, at least a part of the igniter extends into the first chamber, and the cutting and arc extinguishing assembly is located between the igniter and the busbar component; the igniter is used to detonate to provide a thrust to the cutting and arc extinguishing assembly.

[0013] According to the first aspect, in a possible implementation, the circuit breaker further includes a mounting seat, the mounting seat seals one end of the first chamber facing away from the busbar component, and the igniter is arranged on the mounting seat and extends into the first chamber.

[0014] According to the first aspect, in a possible implementation, the circuit breaker further includes a second housing having a second chamber, and a first exhaust hole communicating with the second chamber is provided on the second housing; the first housing is connected to the second housing, and the busbar component is arranged between the first housing and the second housing to separate the first chamber and the second chamber.

[0015] According to the first aspect, in a possible implementation, the circuit breaker further includes a filter element, and the filter element is arranged at the first exhaust hole.

[0016] According to the first aspect, in a possible implementation, the circuit breaker further includes a fixing plate, the fixing plate is connected to the second housing, and at least a part of the filter element is clamped between the fixing plate and the second housing.

[0017] According to the first aspect, in a possible implementation, a second exhaust hole is provided on the fixing plate.

[0018] In a second aspect, an embodiment of the present application further provides a battery, and the battery includes the circuit breaker described in the first aspect.

[0019] In a third aspect, an embodiment of the present application further provides a vehicle, and the vehicle includes the circuit breaker described in the first aspect, or the battery described in the second aspect.

[0020] The circuit breaker, battery and vehicle provided by the present application integrate the cutting and arc extinguishing structures to form a cutting and arc extinguishing assembly. The cutting and arc extinguishing assembly can move towards the busbar component and cut the busbar component. After cutting the busbar component, the cutting and arc extinguishing assembly is located at the notch of the cut busbar component, and can absorb the arc while cutting the busbar component, reducing the time difference between the cutting operation and the arc extinguishing operation, and improving the battery safety performance. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the mechanism of a circuit breaker in an embodiment of the present application;

[0023] Figure 2 is Figure 1 A schematic structural diagram of one side view of the circuit breaker;

[0024] Figure 3 is Figure 1 A schematic cross-sectional structure diagram of the circuit breaker;

[0025] Figure 4 It is a schematic diagram of the structure of the cutting and arc extinguishing assembly of a circuit breaker in an embodiment of the present application;

[0026] Figure 5 is Figure 4 A schematic structural diagram of one side view of the cutting and arc extinguishing assembly in;

[0027] Figure 6 It is a schematic diagram of the structure of the bus bar of a circuit breaker in an embodiment of the present application.

[0028] Reference numerals:

[0029] 100 - Circuit breaker; 10 - Bus bar; 11 - Mounting hole; 12 - First part; 13 - Groove; 20 - Cutting and arc extinguishing assembly; 21 - Cutting tool; 22 - Arc extinguishing part; 221 - Metal grid; 23 - Base; 30 - Housing; 31 - First chamber; 32 - Second chamber; 33 - First housing; 34 - Second housing; 341 - First exhaust hole; 40 - Igniter; 41 - Ignition electrode; 42 - Detonation part; 50 - Mounting seat; 51 - First mounting part; 52 - Second mounting part; 61 - Filter element; 63 - Fixing plate; 64 - Second exhaust hole. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0033] The following will describe in detail some embodiments of this application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] This application provides a vehicle, which includes a circuit breaker. The circuit breaker can be installed at the positive terminal of the vehicle electrical system. When an overload or short circuit occurs in the vehicle circuit, the vehicle battery may be overloaded and its temperature may rise. At this time, the circuit breaker can cut off the power supply in time to prevent damage to the vehicle battery or dangerous situations such as fires.

[0035] It can be understood that the vehicle includes a battery, and the battery provides power for the starting, lighting and other electronic devices of the vehicle. The positive or negative terminal of the battery is connected to the circuit breaker, and the rated current and voltage of the circuit breaker should be selected according to the actual situation of the battery and the circuit to ensure that the circuit breaker will not malfunction under normal working conditions and can cut off the circuit in time under fault conditions.

[0036] The vehicle may include two or more batteries, and the circuit breaker is provided on the circuit connecting the batteries. The circuit breaker can detect the magnitude of the current and abnormal conditions of the circuit. If the current exceeds a preset threshold or a fault such as a short circuit occurs in the circuit, the circuit breaker will quickly cut off the circuit to prevent damage to the battery and the circuit, and at the same time avoid the spread of the fault and protect the safety of other batteries and circuits.

[0037] In other embodiments, the battery can also be internally integrated with a circuit breaker to establish a corresponding relationship between the battery and the circuit breaker, which is conducive to cutting off the corresponding power supply in time when a circuit fault occurs.

[0038] Please refer to Figures 1 to 3, the circuit breaker 100 includes a busbar 10, a cutting and arc extinguishing assembly 20, a housing 30, and an igniter 40. The busbar 10 passes through the housing 30 and divides the inner cavity of the housing 30 into a first chamber 31 and a second chamber 32. The igniter 40 extends into the first chamber 31, and the cutting and arc extinguishing assembly 20 is disposed in the first chamber 31 and can move within the first chamber 31. The igniter 40 can adopt a commonly used ignition device in the art. For example, the igniter 40 can include an ignition electrode 41 and a detonating part 42, and a gas generating agent is filled in the detonating part 42. The specific structure of the igniter 40 is not described in detail in this application. When an abnormal situation is detected, the detonating part 42 is detonated by the ignition electrode 41, generating a large amount of gas. The gas rapidly expands and pushes the cutting and arc extinguishing assembly 20 to move towards the busbar 10, that is, the cutting and arc extinguishing assembly 20 moves along the direction from the cutting and arc extinguishing assembly 20 to the busbar 10 until the cutting and arc extinguishing assembly 20 impacts and cuts off the busbar 10. In this application, the cutting and arc extinguishing structures are integrated. When the busbar 10 is cut off, the cutting and arc extinguishing assembly 20 is located at the notch of the busbar 10 after cutting, and the arc can be absorbed while cutting off the busbar 10, reducing the time difference between the cutting operation and the arc extinguishing operation and improving the battery safety performance.

[0039] Among them, the cutting and arc extinguishing assembly 20 is spaced apart from the busbar 10. When the detonating part 42 is detonated, the generated gas rapidly expands and pushes the cutting and arc extinguishing assembly 20 towards the busbar 10. During this process, the pressure of the gas is converted into the kinetic energy (i.e., momentum) of the cutting and arc extinguishing assembly 20. By reasonably designing the distance between the initial position (the position when not detonated) of the cutting and arc extinguishing assembly 20 and the busbar 10, sufficient momentum can be provided for the cutting and arc extinguishing assembly 20 to cut off the busbar 10 when the impact occurs.

[0040] Please refer to Figure 4 and Figure 5, the cutting and arc extinguishing assembly 20 includes a cutting tool 21, an arc extinguishing part 22 and a base 23. The cutting tool 21 is connected to the base 23 and protrudes towards the bus bar 10. The arc extinguishing part 22 is connected to the base 23 or the cutting tool 21. The bottom plate is horizontally arranged in the first chamber 31. The base 23 can be in sliding contact with the inner wall of the first chamber 31. The base 23 is used to bear the thrust generated when the igniter 40 explodes. Through the cooperation between the base 23 and the inner wall of the first chamber 31, the moving direction of the cutting and arc extinguishing assembly 20 is guided, so as to improve the consistency of the contact position between the cutting tool 21 and the bus bar 10, enable the cutting tool 21 to accurately act on the weak point of the bus bar 10, and thus improve the reliability of cutting off the current. One end of the cutting tool 21 away from the base 23 has a cutting edge. When the igniter 40 is detonated, the generated thrust acts on the base 23, causing the entire cutting and arc extinguishing assembly 20 to move towards the bus bar 10. During the movement, the cutting edge of the cutting tool 21 first contacts the bus bar 10. The cutting edge can reduce the contact area and increase the acting force per unit area, so as to quickly and reliably cut off the bus bar 10. At the same time, when the cutting tool 21 cuts off the bus bar 10 and generates an arc, the arc extinguishing part 22 extinguishes the arc through its specific structure or material to protect the circuit and the circuit breaker 100 device.

[0041] It can be understood that the cutting tool 21 and the arc extinguishing part 22 in the cutting and arc extinguishing assembly 20 can be integrally formed by injection molding, or can be fixedly connected by other means, as long as the cutting tool 21 and the arc extinguishing part 22 can move simultaneously.

[0042] Moreover, the base 23 is in sliding contact with the inner wall of the first chamber 31, reducing the inclination angle of the cutting and arc extinguishing assembly 20 during the movement, thereby avoiding deformation of the cutting and arc extinguishing assembly 20 when it contacts the inner wall of the first chamber 31, reducing the change in the distance between the metal grid pieces 221, and enabling the metal grid pieces 221 to effectively extinguish the arc. It can be understood that the shape of the base 23 can match the cross-sectional shape of the first chamber 31, and the gap between the base 23 and the inner wall of the first chamber 31 is small, so as to control the inclination angle of the cutting and arc extinguishing assembly 20 during the movement.

[0043] The cross-sectional shape of the first chamber 31 can be a non-rotary body, that is, the cross-sectional shape of the first chamber 31 can be a polygon or an irregular geometric shape, preventing the cutting and arc extinguishing assembly 20 from rotating during the movement.

[0044] The arc extinguishing part 22 includes a plurality of metal grid pieces 221 arranged at intervals along the moving direction of the cutting and arc extinguishing assembly 20. When an arc is generated, these metal grid pieces 221 will quickly divide the arc into multiple small segments. Since the voltage drop of the arc is proportional to the arc length, when the arc is divided into multiple small segments, the length of each segment of the arc will decrease, resulting in an increase in the voltage drop of the arc. When the voltage drop of the arc increases to a certain extent, the arc will go out.

[0045] Since the spacing arrangement direction of the metal grid pieces 221 is consistent with the protruding direction of the cutting tool 21, the cutting tool 21 can serve as the installation base for the metal grid pieces 221, thereby connecting the base 23, the cutting tool 21 and the metal grid pieces 221 to form an integral whole.

[0046] A plurality of metal grid pieces 221 are provided on at least one side of the cutting tool 21 along the first direction. In this application, the first direction is the thickness direction of the cutting tool 21. After being cut, the bus bar 10 is divided into two sections and is disposed on both sides of the cutting tool 21 along the first direction. The metal grid pieces 221 can be distributed on one side. In the same space, the extended length that the metal grid pieces 221 can achieve, and the contact area between the electric arc and the metal grid pieces 221 also increases accordingly, thereby accelerating the cooling and extinguishing process of the electric arc. Of course, the metal grid pieces 221 can also be distributed on the opposite sides of the cutting tool 21. When the cutting tool 21 cuts the bus bar 10, no matter on which side the electric arc is generated, it can be quickly captured by the corresponding metal grid pieces 221 and effectively segmented and extinguished. This application does not make a limitation on this.

[0047] It can be understood that in this application, it is not strictly required that the arrangement direction of the metal grid pieces 221 is consistent with the moving direction of the cutting and arc extinguishing assembly 20, nor is it strictly required that the extending direction of the metal grid pieces 221 is perpendicular to the moving direction of the cutting and arc extinguishing assembly 20. It only needs to ensure that the metal grid pieces 221 are arranged at intervals according to a certain rule and can be horizontally arranged at the port of the bus bar 10 after the cutting and arc extinguishing assembly 20 cuts the bus bar 10.

[0048] The cutting tool 21 and the base 23 need to be made of insulating materials. Since the materials of the metal grid pieces 221 and the cutting tool 21 are inconsistent, the metal grid pieces 221 can be embedded in one side of the cutting tool 21 by insert injection molding. Specifically, the metal grid pieces 221 can be pre-placed in the injection mold, and then the insulating material is injected into the mold during the injection process, so that the metal grid pieces 221 are tightly combined with the insulating material. This method can not only ensure the firm connection between the metal grid pieces 221 and the cutting tool 21, but also avoid loosening or falling off caused by factors such as vibration and impact during subsequent use. It can also achieve precise positioning between the metal grid pieces 221 and the cutting tool 21. By precisely controlling the structure and dimensions of the injection mold, the position accuracy of the metal grid pieces 221 and the cutting tool 21 can be improved, so that when cutting the bus bar 10, the electric arc can be accurately guided to the metal grid pieces 221 and effectively extinguished.

[0049] Please refer to Figure 3 and Figure 6, the busbar 10 can be made of copper, aluminum or other conductive metals. Both ends of the busbar 10 are exposed outside the housing 30. Mounting holes 11 are provided at the exposed ends of the busbar 10, and the circuit breaker 100 is connected to the circuit through the mounting holes 11. The busbar 10 is provided with a weak point. When detonated, the busbar 10 is cut off from the weak point, thus disconnecting the circuit.

[0050] The busbar 10 includes a first part 12, and the first part 12 is the weak point of the busbar 10. When it is necessary to cut off the busbar 10, the first part 12 can break.

[0051] In the first example, the strength of the first part 12 is lower than that of the rest of the busbar 10. Acting on the first part 12 by the cutting and arc extinguishing assembly 20 can more easily achieve breakage, reducing the external force required to cut off the circuit.

[0052] In the second example, a cutting groove is provided at the edge of the first part 12. The presence of the cutting groove makes it easier for the first part 12 to break along the cutting groove when an external force is applied. This not only helps to cut off at a predetermined position (the cutting groove), but also can reduce energy loss and mechanical damage during the cutting process.

[0053] In the third example, one side of the first part 12 facing the cutting and arc extinguishing assembly 20 can have an integral groove 13, thereby reducing the thickness of the edge of the first part 12. This also helps to cut off at a predetermined position (the edge of the first part 12), and can reduce energy loss and mechanical damage during the cutting process.

[0054] It should be noted that although the first part 12 is designed to be of lower strength or has a cutting groove at the edge, under normal operating conditions, it can still maintain sufficient strength to withstand normal working loads.

[0055] The first part 12 covers one end opening of the first chamber 31, and the size of the first part 12 is larger than the cross-sectional size of the first chamber 31. When the circuit breaker 100 needs to cut off the circuit, the cutting and arc extinguishing assembly 20 will be pushed by gas and generate a certain impact force. Since the first part 12 can completely cover the opening of the first chamber 31, the cutting and arc extinguishing assembly 20 can accurately act on the first part 12 when pushed by gas. Under this design, the acting force of the cutting and arc extinguishing assembly 20 can be effectively transmitted to the first part 12, enabling the first part 12 to break away from the busbar 10 along a predetermined path (the cutting groove), thus achieving the cutting off of the circuit. And, after the first part 12 breaks away from the busbar 10, the formed notch is also larger than the cross-sectional area of the first chamber 31. Even if the cutting and arc extinguishing assembly 20 continues to move after the circuit breaker 100 operates, the metal grid 221 will not collide with the busbar 10. This design reduces the probability of deformation of the metal grid 221, enabling the metal grid 221 to continue to effectively extinguish arcs in subsequent operations.

[0056] Please refer to again Figure 1 and Figure 3 As shown in FIGS.

[0056] and Figure 1 , the housing 30 includes a first housing 33 and a second housing 34. The first housing 33 has a first chamber 31 therein, and the second housing 34 has a second chamber 32. The current collector 10 is disposed between the first housing 33 and the second housing 34 to separate the first chamber 31 and the second chamber 32. The igniter 40 and the cut-off arc extinguishing assembly 20 are located in the first chamber 31. The igniter 40 provides power for the cut-off arc extinguishing assembly 20 to move the cut-off arc extinguishing assembly 20 along the extending direction of the first chamber 31. After the current collector 10 is cut off, the cut-off arc extinguishing assembly 20 enters the second chamber 32. The first housing 33 and the second housing 34 are connected to form an integral body, and the first housing 33 and the second housing 34 can be fixed by bolts.

[0057] The first housing 33 is connected with a mounting seat 50. The mounting seat 50 seals the side of the first chamber 31 away from the current collector 10. The igniter 40 passes through the mounting seat 50 and extends into the first chamber 31. While providing positioning and support for the igniter 40, it seals the side of the first chamber 31 away from the current collector 10, and limits the gas pressure relief direction when the igniter 40 is detonated, thereby pushing the cut-off arc extinguishing assembly 20 to move away from the mounting seat 50, that is, to move closer to the current collector 10.

[0058] The mounting seat 50 includes a first mounting portion 51 and a second mounting portion 52 which are arranged at intervals. An installation groove is formed on the first mounting portion 51, and the detonation portion 42 is fixed in the installation groove. The second mounting portion 52 is fixed to the first housing 33 and seals the side of the first chamber 31 away from the current collector 10. It can be understood that under the action of gravity, the detonation portion 42 can also support the cut-off arc extinguishing assembly 20 and transmit the acting force to the first housing 33 through the mounting seat 50. One end of the ignition electrode 41 extends into the detonation portion 42, and sequentially passes through the first mounting portion 51 and the second mounting portion 52 and extends out of the first chamber 31 to be connected with an external circuit.

[0059] Of course, in other embodiments, bumps can also be provided on the inner wall of the first chamber 31 to support the cut-off arc extinguishing assembly 20.

[0060] Both the first housing 33 and the mounting seat 50 can be formed by injection molding. The mounting seat 50 is formed by one injection molding and the igniter is fixed on the mounting seat 50. Then, with the mounting seat 50 with the igniter 40 installed as an insert, a second injection molding is carried out to form the first housing 33 which is integrally connected with the mounting seat 50. Thus, there is no gap at the connection between the mounting seat 50 and the first housing 33, improving the connection stability between the mounting seat 50 and the first housing 33 and reducing the probability of the mounting seat 50 detaching when the igniter 40 is detonated.

[0061] The second housing 34 is provided with a first exhaust hole 341 communicating with the second chamber 32. When the igniter 40 inside the circuit breaker 100 is detonated, high-pressure gas will be generated. These gases will push the cutting and arc extinguishing assembly 20 to move towards the busbar 10, thereby achieving the cutting of the circuit. During this process, due to the pushing effect of the gases, the pressure inside the second chamber 32 will increase. The gas inside the second chamber 32 is discharged and relieved through the first exhaust hole 341.

[0062] It can be understood that by designing the position, shape, size, and arrangement rules of the first exhaust hole 341, the effective control of the gas discharge direction and speed inside the second chamber 32 can be achieved. This can not only protect other components inside the circuit breaker 100 from the impact of high-pressure gas, but also reduce the noise and vibration generated when the circuit breaker 100 operates, improving the performance and reliability of the circuit breaker 100.

[0063] A filter element 61 can be provided at the first over-exhaust hole. The filter element 61 can intercept the residues generated by the combustion of the igniter 40. Since the circuit breaker 100 is assembled between two power battery packs and the working environment prohibits high temperature and open fire, the filter element 61 effectively prevents the high-temperature residues from overflowing, thereby protecting other modules of the vehicle.

[0064] The material of the filter element 61 can be selected from one of filter felt, filter cotton, non-woven fabric, glass fiber, and activated carbon, or a combination of these materials. For example, the filter element 61 can be selected as filter felt. Filter felt has good air permeability and a high dust capacity, and can quickly relieve the pressure of the second cavity.

[0065] Based on the above embodiments, the filter element 61 can be arranged inside the first exhaust hole 341. When the igniter 40 is ignited, the generated high-temperature gas and residues will be discharged through the first exhaust hole 341. At this time, the filter element 61 will play its role, capturing and intercepting the residues to prevent them from entering the external environment. At the same time, the gas can smoothly discharge through the tiny gaps of the filter element 61, ensuring the normal operation and heat dissipation of the circuit breaker 100.

[0066] The filter element 61 can also be in a sheet structure. The filter element 61 is attached to the area of the first exhaust hole 341 on the second housing 34, so that the gas must pass through the filter element 61 when discharging, preventing the internal residues from entering the external environment. Using the sheet-shaped filter element 61 only requires fixing the filter element 61 to the second housing 34, and the installation and replacement are simple.

[0067] The filter element 61 can be arranged inside or outside the second housing 34, and this application does not make a limitation on this.

[0068] The filter element 61 can be installed on the second housing 34 through the fixing plate 63. Specifically, the fixing plate 63 can be a frame structure. The fixing plate 63 and the second housing 34 can be connected by fasteners, and the fixing plate 63 and the second housing 34 cooperate to clamp the edge of the filter element 61. By pressing the edge of the filter element 61 with the fixing plate 63, it is possible to prevent high-temperature residues from overflowing from the gap at the edge of the filter element 61.

[0069] The fixing plate 63 can also be a plate-like structure with a second exhaust hole 64. There is a gap between the fixing plate 63 and the second housing 34. The second exhaust hole 64 is formed on the fixing plate 63. The first exhaust hole 341 and the second exhaust hole 64 are both communicated with the gap, and the filter element 61 is filled in the gap. The fixing plate 63 can make the filter element 61 fit the surface where the first exhaust hole 341 is located, and can better adapt to surfaces with complex shapes, such as bending parts, corner parts, etc.

[0070] This application does not limit the installation method of the filter element 61, as long as it is ensured that the filter element 61 is stably installed.

[0071] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is the orientation or positional relationship based on the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0072] The above-disclosed is only a preferred embodiment of this application. Of course, the scope of rights of this application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A circuit breaker, characterized in that: The circuit breaker includes a current collector and an arc-cutting extinguishing assembly, wherein the arc-cutting extinguishing assembly can move toward the current collector to cut off the current collector, and the arc-cutting extinguishing assembly includes a connected cutter and an arc-extinguishing portion, wherein the cutter protrudes toward the current collector to cut off the current collector, and the arc-extinguishing portion is used to extinguish the arc generated by cutting off the current collector.

2. The circuit breaker according to claim 1, characterized in that: The arc-cutting and extinguishing assembly is spaced apart from the current collector.

3. The circuit breaker according to claim 1, characterized in that: The arc extinguishing part includes a plurality of metal grids arranged at intervals along the moving direction of the arc extinguishing assembly, and the plurality of metal grids are arranged on at least one side of the cutter along a first direction, and the first direction is different from the moving direction of the arc extinguishing assembly.

4. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a first shell, wherein the first shell has a first chamber, the current collector is at least partially disposed at an opening at one end of the first chamber, and the arc-cutting and extinguishing assembly is movably disposed in the first chamber.

5. The circuit breaker according to claim 4, characterized in that: The arc-cutting assembly further comprises a base for connecting with the cutter and / or the arc-extinguishing part, and the base is in sliding contact with the inner wall of the first chamber.

6. The circuit breaker according to claim 4, characterized in that: The current collector comprises a first portion, which breaks when the current collector is cut off, and is suitable for covering an opening at one end of the first chamber, and the size of the first portion is larger than the cross-sectional size of the first chamber.

7. The circuit breaker according to claim 6, characterized in that: The strength of the first portion is lower than that of the remaining portions of the current collector, or at least a cutting groove is provided at an edge of the first portion.

8. The circuit breaker according to claim 4, characterized in that: The circuit breaker further comprises an igniter, which at least partially extends into the first chamber, and the arc-cutting extinguishing assembly is located between the igniter and the current collector; the igniter is used for detonating to provide thrust to the arc-cutting extinguishing assembly.

9. The circuit breaker according to claim 8, characterized in that The circuit breaker further comprises a mounting seat, wherein the mounting seat blocks an end of the first chamber away from the current collector, and the igniter is arranged on the mounting seat and extends into the first chamber.

10. The circuit breaker according to claim 4, characterized in that The circuit breaker also includes a second shell having a second chamber, and the second shell is provided with a first exhaust hole connected to the second chamber; the first shell is connected to the second shell, and the conduit is arranged between the first shell and the second shell to separate the first chamber and the second chamber.

11. The circuit breaker according to claim 10, characterized in that The circuit breaker further includes a filter element, and the filter element is arranged at the first exhaust hole.

12. The circuit breaker according to claim 11, characterized in that The circuit breaker further includes a fixing plate connected to the second shell, and the filter element is at least partially clamped between the fixing plate and the second shell.

13. The circuit breaker according to claim 12, characterized in that: The fixing plate is provided with a second exhaust hole.

14. A battery, characterized in that: Comprising a circuit breaker according to any one of claims 1 to 13.

15. A vehicle, characterized in that: The vehicle comprises a battery according to claim 14, or a circuit breaker according to any one of claims 1 to 13.

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