Contactor and arc extinguishing device thereof

Abstract

The utility model discloses a contactor and an arc extinguishing device thereof, the arc extinguishing device comprises an arc extinguishing gate, a magnetic static arc striking sheet and a magnetic movable arc striking sheet, and when a movable contact bar and a static contact bar generate electric arcs, the magnetic movable arc striking sheet and the magnetic static arc striking sheet diverge and guide the electric arcs to one side of the arc extinguishing gate through a magnetic field. According to the technical scheme, the two arc striking sheets are respectively located at the upper end and the lower end of the arc chute and are made of magnetic materials, and arc, gas of charged particles and the like are guided to the two ends of the arc chute in cooperation with the arc blowing effect of the permanent magnet in the axial direction of the contact, so that the arc is divergently guided to one side of the arc chute, and the arc extinguishing effect is improved. In the process, the energy is gradually weakened and continuously cooled, so that the service life of the arc chute can be prolonged, and the situation that a large amount of energy is concentrated in the middle, the arc chute is damaged too quickly, and arc extinguishing cannot be carried out is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a contactor and an arc extinguishing device thereof. Background Art

[0002] Contactors in the prior art are Figure 1 As shown, the contactor includes a stationary contact bar 10, a movable contact bar 20, an arc extinguishing grid 30, a first arc-striking piece 11 and a second arc-striking piece 12. When the stationary contact bar 10 and the movable contact bar 20 in the contactor are disconnected under load, the generated arc will be magnetically blown to the arc extinguishing grid 30 at a high speed (e.g., 100 m / s). However, due to the excessive local energy of the arc, when the arc concentrates into the middle of the arc extinguishing grid 30, the arc extinguishing grid 30 will be damaged, and the arc cannot be completely guided to the arc extinguishing grid 30, affecting the arc extinguishing effect of the arc extinguishing grid. Utility Model Content

[0003] The embodiment of the utility model provides a contactor and an arc extinguishing device thereof to solve the above technical problems.

[0004] A first aspect of an embodiment of the utility model provides an arc extinguishing device for a contactor, wherein the contactor comprises a stationary contact bar and a movable contact bar arranged opposite to the stationary contact bar, and the arc extinguishing device comprises:

[0005] An arc extinguishing grid, which is arranged adjacent to the stationary contact bar and the moving contact bar;

[0006] A magnetic static arc-striking piece, one end of which is fixedly connected to one end of the static contact row, and the other end of which is fixedly connected to the first end of the arc-extinguishing grid;

[0007] A magnetic moving arc-striking piece, one end of which is fixedly connected to one end of the moving contact bar, and the other end of which is close to the second end of the arc-extinguishing grid and is linked to the moving contact bar;

[0008] When an arc is generated between the movable contact bar and the stationary contact bar, the movable magnetic arc-striking piece and the stationary magnetic arc-striking piece diverge and guide the arc toward one side of the arc-extinguishing grid through a magnetic field;

[0009] The magnetic static arc-starting piece guides part of the arc in the direction of the first end of the arc-extinguishing grid, so that the part of the arc is dispersed between the first end of the arc-extinguishing grid and the middle of the arc-extinguishing grid;

[0010] The magnetic movable arc-starting piece guides part of the arc in the direction of the second end of the arc-extinguishing grid, so that the part of the arc is dispersed between the second end of the arc-extinguishing grid and the middle of the arc-extinguishing grid.

[0011] Optionally, when the contact point of the moving contact row contacts the contact point of the stationary contact row, the other end of the magnetic moving arc-striking piece contacts the second end of the arc-extinguishing grid.

[0012] Optionally, the arc extinguishing device further includes a filter assembly, an inlet of the filter assembly is connected to the arc extinguishing grid, and the filter assembly is used to filter sparks generated by the electric arc.

[0013] Optionally, the filter assembly includes a filter screen or at least two filter screens arranged in sequence.

[0014] Optionally, the arc extinguishing device also includes a release chamber, in which at least one partition is provided, and the at least one partition divides the release chamber into at least two release sub-chambers with the same air pressure, the inlet of each release sub-chamber is connected to the outlet of the filter assembly, and the outlet of each release sub-chamber is provided with at least one exhaust hole.

[0015] Optionally, an adjusting partition is provided in the release chamber, and the adjusting partition divides the release chamber into a first release sub-chamber and a second release sub-chamber with the same air pressure.

[0016] Optionally, an inner concave cavity is provided at the bottom of each release sub-cavity, and at least one exhaust hole is provided on the bottom wall or side wall of the inner concave cavity.

[0017] A second aspect of an embodiment of the utility model provides a contactor, the contactor comprising the arc extinguishing device of the first aspect, the contactor comprising a stationary contact bank and a moving contact bank arranged opposite to the stationary contact bank.

[0018] The technical effect of the embodiment of the utility model is as follows: by setting two arc-starting pieces respectively located at the upper and lower ends of the arc-extinguishing grid, and both using magnetic materials, in conjunction with the arc blowing effect of the permanent magnet in the axial direction of the contact, the arc, gas of charged particles, etc. are guided to the two ends of the arc-extinguishing grid, so that the arc is diverged and guided to one side of the arc-extinguishing grid. In this process, the energy is gradually weakened and continuously cooled, which can extend the use of the arc-extinguishing grid and prevent a large amount of energy from being concentrated in the middle to damage the arc-extinguishing grid too quickly, resulting in the inability to extinguish the arc. This arc-extinguishing device utilizes the structural design of the magnetic arc-starting piece and the arc-extinguishing grid, and through the control of the magnetic field and physical position, effectively guides and extinguishes the generated arc, thereby protecting the contactor and circuit equipment, and improving the safety and reliability of the equipment. This design can play an important role in circuits with high current, high voltage or frequent switching, and prevent equipment damage and safety hazards caused by arc generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a contactor provided by the prior art;

[0021] Figure 2 This is a structural schematic diagram of an arc extinguishing device for a contactor provided in Embodiment 1 of the utility model;

[0022] Figure 3 This is a schematic structural diagram of an arc extinguishing device for a contactor provided in Embodiment 1 of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of an arc extinguishing device for a contactor provided in Embodiment 2 of the present utility model;

[0024] Figure 5 This is a structural diagram of an arc extinguishing device for a contactor provided in Embodiment 2 of the present utility model;

[0025] Figure 6 This is a schematic diagram of the structure of an arc extinguishing device for a contactor provided in Embodiment 2 of the present utility model;

[0026] Figure 7 This is a schematic diagram of the structure of an arc extinguishing device for a contactor provided in Embodiment 3 of the present utility model;

[0027] Figure 8 This is a structural diagram of an arc extinguishing device for a contactor provided in Embodiment 3 of the present utility model;

[0028] Fig. 9 This is a structural schematic diagram of an arc extinguishing device for a contactor provided in Embodiment 4 of the present utility model;

[0029] Fig.10 This is a structural diagram of a release chamber in an arc extinguishing device of a contactor provided in Embodiment 4 of the utility model;

[0030] Fig.11 This is a structural diagram of a release chamber in an arc extinguishing device of a contactor provided in Embodiment 4 of the utility model;

[0031] Fig.12 This is a schematic diagram of the connection structure of a contactor provided in Embodiment 5 of the present utility model;

[0032] In the figure: 10, static contact row; 20, dynamic contact row; 30, arc extinguishing grid; 40, magnetic static arc-striking plate; 50, magnetic dynamic arc-striking plate; 60, magnetic member; 70, filter assembly; 71, first filter screen; 72, second filter screen; 80, release chamber; 81, partition; 82, first release sub-chamber; 83, second release sub-chamber; 90, inner concave chamber; 91, first exhaust hole; 92, second exhaust hole; 93, first inner concave chamber; 94, second inner concave chamber; 100, arc extinguishing device; 110, power battery module; 120, cooling module; 130, battery pack. DETAILED DESCRIPTION

[0033] 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 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.

[0034] It should be understood that the utility model can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0035] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. On the contrary, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0036] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0037] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0038] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0039] Embodiment 1

[0040] The first embodiment of the utility model provides an arc extinguishing device for a contactor, which solves the problem in the prior art that excessive local arc energy concentrates into the middle of the arc extinguishing grid, which damages the arc extinguishing grid and has a poor arc extinguishing effect.

[0041] The technical solution provided by the first embodiment of the present utility model is as follows: Figure 2 and Figure 3 As shown, an arc extinguishing device of a contactor is provided, the contactor comprises a stationary contact row 10 and a moving contact row 20 arranged opposite to the stationary contact row 10, and the arc extinguishing device comprises:

[0042] The arc extinguishing grid 30 is arranged adjacent to the stationary contact bar 10 and the moving contact bar 20;

[0043] A magnetic static arc-striking piece 40, one end of which is fixedly connected to one end of the static contact row 10, and the other end of which is fixedly connected to the first end of the arc-extinguishing grid 30;

[0044] A magnetic moving arc-striking piece 50, one end of which is fixedly connected to one end of the moving contact bar 20, and the other end of which is close to the second end of the arc-extinguishing grid 30 and is linked to the moving contact bar 20;

[0045] When an arc is generated between the moving contact bar 20 and the stationary contact bar 10, the moving magnetic arc-striking piece 50 and the stationary magnetic arc-striking piece 40 diverge and guide the arc toward one side of the arc-extinguishing grid 30 through the magnetic field;

[0046] The magnetic static arc-starting piece 40 guides part of the arc in the arc toward the first end of the arc-extinguishing grid 30, so that part of the arc is dispersed between the first end of the arc-extinguishing grid 30 and the middle of the arc-extinguishing grid 30;

[0047] The magnetic movable arc-starting piece 50 guides part of the arc in the direction of the second end of the arc-extinguishing grid 30 , so that part of the arc is dispersed between the second end of the arc-extinguishing grid 30 and the middle of the arc-extinguishing grid 30 .

[0048] Among them, the static contact bar 10 and the moving contact bar 20 are two important components in the contactor, which are used to establish or interrupt electrical connections, and can be connected and disconnected by a driving mechanism. The arc extinguishing grid 30 is a device for eliminating arcs. The arc extinguishing grid 30 may include multiple grids. The magnetic static arc-starting piece 40 is connected to the static contact bar 10. As a part of guiding the arc, the magnetic static arc-starting piece 40 guides the arc by generating a magnetic field through itself set as a magnetic material, thereby attracting the arc to move in a direction close to the magnetic static arc-starting piece 40, that is, through the action of the magnetic field, the magnetic static arc-starting piece 40 can control the propagation direction and range of the arc, and then can guide the arc to multiple grids on one side of the arc extinguishing grid 30 close to the magnetic static arc-starting piece 40, so as to disperse and guide the arc to extinguish. The magnetic moving arc-starting piece 50 is connected to the moving contact bar 20. The magnetic moving arc-starting piece 50 is in a linkage state with the moving contact bar 20, and can move with the moving contact bar 20, and is also used to guide a part of the arc. The magnetic static arc-starting piece 40 guides the arc by generating a magnetic field through the magnetic material itself, thereby attracting the arc to move in the direction close to the magnetic dynamic arc-starting piece 50, that is, through the effect of the magnetic field, the magnetic static arc-starting piece 40 can control the propagation direction and range of the arc. This embodiment adopts DC arc extinguishing, and the length of the arc is lengthened by the magnetic static arc-starting piece 40 and the magnetic dynamic arc-starting piece 50, so that the energy dispersed to each small section can be small, so that the arc extinguishing grid 30 cools the arc and extinguishes the arc.

[0049] Among them, the magnetic force of the magnetic static arc-starting piece and the magnetic dynamic arc-starting piece on the charged particles in the arc can remain unchanged or be in a changing state, for example, the magnetic force changes from large to small. Keeping the magnetic force of the magnetic static arc-starting piece and the magnetic dynamic arc-starting piece unchanged can bring some advantages, including but not limited to the following points:

[0050] Since the charged particles in the arc are affected by the magnetic force, the constant magnetic force can effectively guide the arc to move in the desired direction, thereby achieving more effective arc extinguishing. As the magnetic force remains constant, the distribution of the magnetic field can be optimized, making the arc more stable during movement and less likely to deviate from the predetermined arc extinguishing path, thereby improving the accuracy and reliability of arc extinguishing.

[0051] Among them, the materials of the magnetic static arc-striking plates and the magnetic dynamic arc-striking plates can be mixed magnetic materials in composite steel. For example, the magnetic material can be nickel powder magnetic material microparticles, thereby making the magnetic static arc-striking plates and the magnetic dynamic arc-striking plates magnetic.

[0052] Among them, a plurality of grids arranged in sequence are arranged between the first end and the second end of the arc extinguishing grid 30. When an arc is generated between the moving contact row 20 and the stationary contact row 10, the function of the magnetic static arc-starting plate 40 is to guide part of the arc in the direction of the first end of the arc extinguishing grid 30, so as to control the flow direction of the arc. The magnetic static arc-starting plate 40 helps to disperse the arc between the first end and the middle of the arc extinguishing grid 30. This guiding effect can lengthen the arc, disperse the arc energy, and prevent the arc from concentrating on the central area of ​​the arc extinguishing grid 30, thereby avoiding the situation of excessive arc concentration. If the arc is too concentrated and impacts a specific area of ​​the arc extinguishing grid 30, it may cause the arc extinguishing grid 30 to be unable to effectively handle the arc in this area, resulting in the risk of damage or failure of the arc extinguishing grid 30. By dispersing the arc to different areas of the arc extinguishing grid 30, the magnetic static arc-starting plate 40 effectively reduces this risk and improves the reliability and safety of the equipment.

[0053] When the contact of the moving contact row 20 contacts the contact of the stationary contact row 10, the other end of the magnetic moving arc-striking piece 50 contacts the second end of the arc-extinguishing grid 30. The magnetic moving arc-striking piece 50 moves to the position of the arc-extinguishing grid 30, contacts or approaches the arc-extinguishing grid 30, and forms a closed space. The arc is guided to move along the magnetic moving arc-striking piece 50, and finally extinguishes on the arc-extinguishing grid 30. When an arc is generated between the moving contact row 20 and the stationary contact row 10, the function of the magnetic moving arc-striking piece 50 is to guide part of the arc in the arc to the second end of the arc-extinguishing grid 30, and also to control the flow direction of the arc. By guiding part of the arc to the second end of the arc-extinguishing grid 30, the magnetic moving arc-striking piece 50 ensures that the arc is evenly dispersed between the second end and the middle of the arc-extinguishing grid 30, elongates the arc, and disperses the arc energy, thereby effectively extinguishing the arc and avoiding excessive concentration of the arc in the central area of ​​the arc-extinguishing grid 30. By dispersing the arc, the magnetic movable arc-striking piece 50 ensures the effective use of the entire arc-extinguishing grid 30 and reduces the risk of reduced arc-extinguishing efficiency due to arc concentration.

[0054] The technical effect of this embodiment is: by setting two arc-starting pieces respectively at the upper and lower ends of the arc-extinguishing grid, and both using magnetic materials, with the arc blowing effect of the permanent magnet in the axial direction of the contact, the arc, gas of charged particles, etc. are guided to the two ends of the arc-extinguishing grid, so that the arc is diverged and guided to one side of the arc-extinguishing grid. In this process, the energy is gradually weakened and continuously cooled, which can extend the use of the arc-extinguishing grid and prevent a large amount of energy from being concentrated in the middle to damage the arc-extinguishing grid too quickly, resulting in the inability to extinguish the arc. This arc-extinguishing device uses the structural design of the magnetic arc-starting piece and the arc-extinguishing grid, and effectively guides and extinguishes the generated arc through the control of the magnetic field and the physical position. DC arc extinguishing is adopted, and the length of the arc is lengthened by the magnetic static arc-starting piece and the magnetic dynamic arc-starting piece, which can reduce the energy dispersed to each small section, so that the arc-extinguishing grid cools the arc and extinguishes the arc, thereby protecting the contactor and circuit equipment, and improving the safety and reliability of the equipment. This design can play an important role in high-current, high-voltage or frequently switched circuits to prevent equipment damage and safety hazards caused by arc generation.

[0055] Embodiment 2

[0056] A second embodiment of the present invention provides an arc extinguishing device for a contactor, wherein a filter is arranged in the arc extinguishing device to process sparks generated by an electric arc.

[0057] The technical solution provided in the second embodiment of the present utility model is based on the technical solution provided in the first embodiment, such as Figure 4 As shown, the arc extinguishing device further includes a filter assembly 70, an inlet of the filter assembly 70 is connected to the arc extinguishing grid 30, and the filter assembly 70 is used to filter sparks generated by the electric arc.

[0058] As an embodiment, the filter assembly 70 includes a filter screen or at least two filter screens arranged in sequence.

[0059] The filter assembly 70 is connected to the outlet of the arc extinguishing grid 30. When the arc passes through the arc extinguishing grid 30 and enters the filter assembly 70, the filter mesh inside the filter assembly 70 plays a filtering role to prevent the spark from continuing to propagate and spread.

[0060] For the above-mentioned embodiments 1 and 2, as an example, Figure 5 and Figure 6 As shown, an arc extinguishing device of a contactor, the contactor comprises a stationary contact bar 10 and a moving contact bar 20 arranged opposite to the stationary contact bar 10, the arc extinguishing device comprises: an arc extinguishing grid 30, a magnetic static arc-striking piece 40, and a magnetic moving arc-striking piece 50, when an arc is generated between the moving contact bar 20 and the stationary contact bar 10, the magnetic moving arc-striking piece 50 and the magnetic static arc-striking piece 40 diverge and guide the arc to one side of the arc extinguishing grid 30 through a magnetic field. The arc extinguishing device also comprises a first filter screen 71 and a second filter screen 72, the inlets of the first filter screen 71 and the second filter screen 72 are connected to the arc extinguishing grid 30, and the first filter screen 71 and the second filter screen 72 are used to filter the sparks generated by the arc in sequence.

[0061] The technical effect of the second embodiment is that the main function of setting the filter assembly is to filter the sparks generated by the arc to prevent the sparks from further spreading and causing greater safety hazards. The design of the filter can effectively capture and isolate the sparks, protect the equipment from the potential dangers caused by the sparks, and improve the safety and reliability of the equipment. In general, the arc extinguishing device and the filter assembly work together in the process of handling the sparks generated by the arc. The arc extinguishing device is responsible for guiding the arc and extinguishing it, and the filter assembly is responsible for filtering the sparks to ensure that the sparks will not spread and cause safety problems, effectively improving the safety and stability of the equipment, and playing an important role in the arc handling process.

[0062] Embodiment 3

[0063] In the prior art, after the arc is extinguished by the arc extinguishing grid and filtered by the filter assembly, the excess gas is concentrated in the middle and released. During the release process, it is easy to damage the contactor housing and even the surrounding device housings, affecting product performance.

[0064] The third embodiment of the utility model provides an arc extinguishing device for a contactor, which prevents the local energy of the filtered gas from being too large to cause damage to surrounding devices by arranging a release chamber behind the filter component.

[0065] The technical solution provided in the third embodiment of the present utility model is based on the technical solution provided in the second embodiment, such as Figure 7As shown, the arc extinguishing device also includes a release chamber 80, in which at least one partition is provided. The at least one partition divides the release chamber 80 into at least two release sub-chambers with the same air pressure, and the inlet of each release sub-chamber is connected to the outlet of the filter assembly 70.

[0066] Among them, the release chamber 80 is a component, which contains at least one partition, dividing it into at least two release sub-chambers. The adjustable partition can be moved. The purpose of this design is to divide the gas release chamber 80 into different areas to ensure that the released gas can be more evenly distributed and reduce damage to the shell.

[0067] As an embodiment, an adjusting partition is provided in the release chamber 80, and the adjusting partition divides the release chamber 80 into a first release sub-chamber and a second release sub-chamber with the same air pressure. The function of the adjusting partition is to adjust the release amount and pressure of the gas as needed, so that the air pressure of the two sub-chambers is basically balanced. One end of the partition is close to the filter screen, and the other end is connected to the bottom of the shell, dividing the release chamber 80 into two release sub-chambers, each of which has at least one or more exhaust holes for releasing gas and adjusting the pressure and flow of the gas. By adjusting the size and number of these exhaust holes, the speed and uniformity of the released gas can be further controlled.

[0068] As an example, Figure 8 As shown, the arc extinguishing device also includes a release chamber 80 , in which a partition 81 is provided. The partition 81 divides the release chamber 80 into a first release sub-chamber 82 and a second release sub-chamber 83 . The inlet of each release sub-chamber is connected to the outlet of the second filter screen 72 .

[0069] The technical effect of this embodiment is that by adjusting the position of the partition, the air pressure of each release sub-cavity is kept balanced, which helps to reduce the pressure of the released gas on the surrounding devices and reduces the risk of damaging the surrounding devices. At the same time, the pressure of the released gas is more uniform, which is not easy to cause damage to the surrounding devices (battery pack shell, power battery module or other components). The setting of the partition effectively disperses the gas pressure, reduces the concentrated force on the shell, and extends the service life of the shell. Since the pressure of the released gas is more uniform, the system is more stable, which reduces accidents caused by uneven air pressure and improves the safety of the system.

[0070] Embodiment 4

[0071] In the prior art, the remaining gas is released directly from the exhaust hole through the release cavity, and the local energy is too large, which can easily damage the components adjacent to the release cavity and affect the product performance.

[0072] The fourth embodiment of the present utility model provides an arc extinguishing device for a contactor, which prevents gas from being directly released to contact the inner wall of a battery pack and damage the battery pack structure by setting an inner concave cavity at the bottom of the cavity.

[0073] The technical solution provided in the fourth embodiment of the present utility model is based on the technical solution provided in the third embodiment, such as Fig. 9 As shown, each release sub-cavity has an inner concave cavity 90 sunken into the cavity at the bottom, and the bottom wall or side wall of the inner concave cavity 90 is provided with at least one exhaust hole.

[0074] Among them, a concave exhaust hole structure is set near the bottom of the outer shell. The exhaust hole, the bottom of the outer shell and the inner wall of the battery pack form a cavity as a buffer chamber, which can prevent the gas from being directly released and contacting the inner wall of the battery pack, thereby avoiding the possibility of damage to the battery pack structure.

[0075] As an example, Fig.10 and Fig.11 As shown, a partition 81 is provided in the release chamber 80, and the partition 81 divides the release chamber 80 into a first release sub-chamber 82 and a second release sub-chamber 83. A first inner concave cavity 93 is provided at the bottom of the first release sub-chamber 82, and a second inner concave cavity 94 is provided at the bottom of the second release sub-chamber 83. A first exhaust hole 91 is provided on the first inner concave cavity 93, and a second exhaust hole 92 is provided on the second inner concave cavity 94.

[0076] The technical effect of this embodiment is as follows: a concave exhaust hole structure is provided near the bottom of the outer shell, and the exhaust hole, the bottom of the outer shell, and the inner wall of the battery pack form a cavity which serves as a buffer chamber, thereby preventing the gas from being directly released and contacting the inner wall of the battery pack, thereby avoiding the possibility of damage to the battery pack structure.

[0077] The working process of the above embodiment is as follows:

[0078] When the gas needs to be released, the gas enters the release chamber 80 through the outlet of the filter assembly 70. The partition divides the release chamber 80 into multiple sub-chambers, and the air pressure of the sub-chamber can be adjusted by adjusting the partition. After the pressure of the gas in the release chamber 80 is balanced, it is released into the external environment through the exhaust holes at both ends of the partition. By separating the release chamber 80 and adjusting the partition, precise control and regulation of the released gas is achieved. The air pressure distribution in the release chamber 80 is more uniform, avoiding the problem of shell damage that may be caused by concentrated gas release. The exhaust hole forms a cavity with the bottom of the outer shell and the inner wall of the battery pack, which serves as a buffer chamber for outward release. The design of the exhaust hole makes the released gas flow rate and speed adjustable, thereby meeting the needs of different scenarios and improving the flexibility and applicability of the device.

[0079] Embodiment 5

[0080] A fifth embodiment of the present invention provides a contactor, the contactor includes the arc extinguishing device described in embodiments one to four, and the contactor includes a stationary contact row and a moving contact row arranged opposite to the stationary contact row.

[0081] like Fig.12As shown, as an embodiment, the contactor is located in the battery pack 130, and the battery pack 130 also includes an arc extinguishing device 100, a power battery module 110 and a cooling module 120. The power battery module 110 is located on the cooling module 120, and the inner concave cavity of the release cavity of the arc extinguishing device 100 is aligned with the cooling module 120, so that the cooling module 120 cools the gas discharged by the arc extinguishing device 100 to prevent the gas discharged by the arc extinguishing device 100 from damaging the battery pack shell and the power battery module 110 or other components inside.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An arc extinguishing device for a contactor, the contactor comprising a stationary contact row (10) and a movable contact row (20) arranged opposite to the stationary contact row (10), characterized in that: The arc extinguishing device comprises: An arc extinguishing grid (30) is arranged adjacent to the stationary contact row (10) and the movable contact row (20); A magnetic static arc-striking piece (40), one end of which is fixedly connected to one end of the static contact row (10), and the other end of which is fixedly connected to the first end of the arc-extinguishing grid (30); A magnetic moving arc-striking piece (50), one end of which is fixedly connected to one end of the moving contact bar (20), and the other end of which is close to the second end of the arc-extinguishing grid (30) and is linked to the moving contact bar (20); When an arc is generated between the movable contact row (20) and the stationary contact row (10), the movable magnetic arc-starting piece (50) and the stationary magnetic arc-starting piece (40) diverge and guide the arc toward one side of the arc-extinguishing grid (30) through a magnetic field; The magnetic static arc-starting piece (40) guides part of the electric arc toward the first end of the arc-extinguishing grid (30), so that the part of the electric arc is dispersed between the first end of the arc-extinguishing grid (30) and the middle of the arc-extinguishing grid (30); The magnetic movable arc-starting piece (50) guides part of the electric arc toward the second end of the arc-extinguishing grid (30), so that the part of the electric arc is dispersed between the second end of the arc-extinguishing grid (30) and the middle of the arc-extinguishing grid (30).

2. The arc extinguishing device according to claim 1, characterized in that: When the contact point of the moving contact row (20) contacts the contact point of the stationary contact row (10), the other end of the magnetic moving arc-starting piece (50) contacts the second end of the arc-extinguishing grid (30).

3. The arc extinguishing device according to claim 1, characterized in that: The arc extinguishing device further comprises a filter assembly (70), the inlet of the filter assembly (70) is connected to the arc extinguishing grid (30), and the filter assembly (70) is used for filtering sparks generated by the electric arc.

4. The arc extinguishing device according to claim 3, characterized in that: The filter assembly (70) comprises a filter screen or at least two filter screens arranged in sequence.

5. The arc extinguishing device according to claim 3, characterized in that: The arc extinguishing device also includes a release chamber (80), wherein at least one partition is provided in the release chamber (80), and the at least one partition divides the release chamber (80) into at least two release sub-chambers with the same air pressure, the inlet of each release sub-chamber is connected to the outlet of the filter assembly (70), and the outlet of each release sub-chamber is provided with at least one exhaust hole.

6. The arc extinguishing device according to claim 5, characterized in that: An adjusting partition (81) is provided in the release chamber (80), and the adjusting partition divides the release chamber into a first release sub-chamber (82) and a second release sub-chamber (83) having the same air pressure.

7. The arc extinguishing device according to claim 6, characterized in that: An inner concave cavity (90) recessed into the cavity is provided at the bottom of each release sub-cavity, and at least one exhaust hole is provided on the bottom wall or side wall of the inner concave cavity (90).

8. A contactor, characterized in that: The contactor comprises the arc extinguishing device according to any one of claims 1 to 7, and the contactor comprises a stationary contact bank and a moving contact bank arranged opposite to the stationary contact bank.

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