Capacitor protection assembly and capacitor

Abstract

The present application relates to the technical field of capacitors, and discloses a capacitor protection assembly and a capacitor. The capacitor protection assembly comprises a housing, a cover body, a support, and a conductive assembly. The housing is provided with an accommodating cavity for placing a capacitor assembly. The cover body covers an opening of the accommodating cavity. The support is mounted on the cover body, and is at least partially located within the accommodating cavity. The conductive assembly comprises a first conductive member and a second conductive member connected to each other. The first conductive member is directly or indirectly connected to the cover body, and the second conductive member is mounted on the support. An electrical barrier is arranged on the support, and is disposed on the periphery of the second conductive member. When the capacitor assembly fails, the cover body expands in a direction away from the support, and the first conductive member is disconnected from the second conductive member. The capacitor protection assembly provided in the present application can enhance capacitor protection and reduce the likelihood of capacitor failure.

Description

Capacitor protection assembly and capacitor

[0001] The present application claims priority to the Chinese Patent Application No. 2024209184457, filed on April 29, 2024, and entitled "Capacitor protection assembly and capacitor", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of capacitors, and in particular to a capacitor protection assembly and capacitor. BACKGROUND

[0003] A capacitor is a device that stores electric charge. When the internal capacitor assembly of the capacitor ages or is damaged during use, the air pressure and temperature inside the capacitor housing will rapidly increase, and when it reaches a certain level, the capacitor will explode.

[0004] The prior art sets a protection structure in the capacitor, which can protect the capacitor assembly. When the capacitor fails, the protection structure can disconnect the internal electrical connection of the capacitor, thereby preventing explosion.

[0005] However, the existing protection structure has poor stability and weak protection ability for the capacitor assembly, resulting in low safety of the capacitor in use.

[0006] CONTENT OF THE UTILITY MODEL

[0007] The purpose of the present application is to provide a capacitor protection assembly and capacitor that can improve the protection ability of the capacitor and reduce the probability of capacitor failure.

[0008] In a first aspect, the embodiments of the present application provide a capacitor protection assembly, comprising: a housing, a cover, a bracket, and a conductive assembly. The housing has a receiving cavity for placing a capacitor assembly. The cover is arranged at the opening of the receiving cavity. The bracket is mounted on the cover and at least partially located in the receiving cavity. The conductive assembly comprises a first conductive member and a second conductive member connected together, the first conductive member is directly or indirectly connected with the cover, and the second conductive member is mounted on the bracket. An electrical fence is arranged on the bracket and located on the side of the second conductive member. When the capacitor assembly fails, the cover expands in a direction away from the bracket, and the first conductive member and the second conductive member are disconnected.

[0009] Based on the above-mentioned embodiments of the present application, by arranging a bracket between the cover and the capacitor assembly, connecting the second conductive member between the bracket and the capacitor assembly, and connecting the first conductive member between the cover and the second conductive member, when the capacitor assembly fails and the housing and the cover expand and deform, the cover can move the first conductive member to separate the first conductive member from the second conductive member, thereby disconnecting the internal electrical connection of the capacitor and reducing the possibility of explosion of the capacitor.

[0010] The rigidity of the support and the support provided by the electric fence can effectively reduce the deformation of the support caused by high temperature and high pressure, so that the support can maintain stable shape and structure when the capacitor fails, and can fix the position of the second conductive part, so that the first conductive part and the second conductive part can be disconnected in time, and the capacitor assembly is prevented from further damage and explosion. Therefore, this setting form can significantly improve the safety of the capacitor.

[0011] In a possible design, the electric fence includes a plurality of partitions arranged at intervals, and the plurality of partitions are located on the side of the support close to the capacitor assembly and extend from the support to the capacitor assembly. The periphery of the second conductive part is provided with at least two partitions.

[0012] Based on the above embodiments of the present application, the plurality of partitions arranged at intervals on the side of the support close to the capacitor assembly can improve the deformation resistance of the support, prevent the support from deforming, and improve the structural stability of the support. In addition, the plurality of partitions arranged on the periphery of the second conductive part can separate the second conductive parts to prevent the second conductive parts from affecting each other.

[0013] In a possible design, a plurality of second conductive parts are provided, and the second conductive parts are arranged correspondingly between two partitions.

[0014] Based on the above embodiments of the present application, the plurality of second conductive parts correspond to the positive and negative electrodes of the capacitor, and the second conductive part corresponding to the positive electrode and the second conductive part corresponding to the negative electrode are arranged between different two partitions. In this way, the second conductive parts corresponding to different electrodes are separated by the partitions of the electric fence, the influence between the second conductive parts is reduced, and the use safety of the capacitor is improved.

[0015] In a possible design, at least one reinforcing rib is arranged on the side of the support facing the cover.

[0016] Based on the above embodiments of the present application, the reinforcing rib can improve the structural stability of the support, so that the support is not easy to deform after the capacitor fails, and the second conductive part fixed on the support can be kept at the set position, so that the first conductive part can be disconnected from the second conductive part in time when the cover moves.

[0017] In a possible design, a clearance hole is arranged on the support, the side of the support close to the capacitor assembly is connected with the second conductive part, and the first conductive part can pass through the clearance hole to be connected with the second conductive part.

[0018] Based on the above-mentioned embodiments of the present application, the second conductive part can be blocked by the support on the side away from the cover, and when the cover expands and deforms and drives the first conductive part to move, the spot welding of the first conductive part and the second conductive part can be disconnected in time, preventing the first conductive part from driving the second conductive part to move at the same time.

[0019] In a possible design, the second conductive part extends towards the capacitor assembly, and the extended part of the second conductive part is electrically connected to the capacitor assembly.

[0020] Based on the above-mentioned embodiments of the present application, compared with the previous electrical connection between the capacitor assembly and the second conductive part through the electrical connector, the present embodiment adopts the form of direct connection between the extended part of the second conductive part and the capacitor assembly, has higher electrical connection stability, and has a simple setting form, can also save the cost of setting other electrical connectors, and reduces the probability of capacitor failure.

[0021] In a possible design, the side of the cover away from the support is provided with a wiring assembly, the first end of the first conductive part is connected to the wiring assembly, and the second end of the first conductive part is spot-welded to the second conductive part. The cover expands in the direction away from the support, the wiring assembly drives the first conductive part to move away from the second conductive part, so that the spot welding is disconnected.

[0022] Based on the above-mentioned embodiments of the present application, the wiring assembly is arranged on the cover and outside the shell, the wiring assembly is electrically connected to the second conductive part through the first conductive part, when the cover expands and deforms, the first end of the first conductive part will move away from the support with the wiring assembly, so that the second end of the first conductive part is disconnected from the spot welding of the second conductive part, to realize the disconnection of the internal electrical connection of the capacitor, and reduce the possibility of further explosion of the capacitor. This setting form has the advantages of simple structure, easy assembly and being conducive to timely disconnection of the electrical connection.

[0023] In a possible design, the support is provided with a first positioning part, the first positioning part is arranged on the side of the support close to the capacitor assembly, the capacitor assembly is provided with a second positioning part, and the first positioning part can correspondingly connect the second positioning part.

[0024] Based on the above-mentioned embodiments of the present application, the first positioning part and the second positioning part cooperate to assist in positioning the position of the capacitor assembly in the accommodating cavity through the support, which is conducive to improving the installation stability of the capacitor assembly in the shell.

[0025] In a possible design, the first positioning part is arranged at the central position of the side of the support close to the capacitor assembly, the second positioning part is arranged at the central position of the side of the capacitor assembly close to the support, and the first positioning part correspondingly connects the second positioning part to relatively centrally arrange the capacitor assembly and the support.

[0026] Based on the above-mentioned embodiments of the present application, the first positioning part is arranged at the central position of the support, and the corresponding second positioning part is arranged at the central position of the capacitor assembly, so that the capacitor assembly is located at the central position of the support after assembly, and at the same time, the capacitor assembly is located at the central position of the accommodating cavity. In this way, the capacitor assembly can keep the same distance from the side wall of the shell, avoiding the contact between the capacitor assembly and the side wall of the shell to cause short circuit of the capacitor and other faults, and further enhancing the protection of the capacitor assembly to reduce the risk of explosion of the capacitor caused by the fault of the capacitor assembly.

[0027] In a second aspect, the embodiments of the present application further provide a capacitor, comprising a capacitor assembly and the above-mentioned capacitor protection assembly, wherein the capacitor assembly is installed in the capacitor protection assembly.

[0028] Based on the above-mentioned embodiments of the present application, the capacitor with the above-mentioned capacitor protection assembly has higher safety. When the capacitor assembly fails, the rapidly increasing gas pressure and temperature in the shell will cause the shell and the cover to swell and deform. In the process of swelling and deforming of the cover, the first conductive part connected to the cover will move away from the second conductive part. Since the reinforcing ribs and the electric fence arranged on the support can improve the rigidity of the support to reduce the deformation amount of the support when the capacitor fails, the second conductive part can be kept at the arranged position. Then, the spot welding between the first conductive part and the second conductive part is pulled off, so that the internal electrical connection of the capacitor is disconnected, and the purpose of explosion-proof of the capacitor is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0030] Fig. 1 is a schematic diagram of the overall structure of the capacitor provided by the embodiments of the present application;

[0031] Fig. 2 is an exploded view of the capacitor provided by the embodiments of the present application;

[0032] Fig. 3 is a sectional view of the capacitor provided by the embodiments of the present application;

[0033] Fig. 4 is one perspective view of the support provided by the embodiments of the present application;

[0034] Fig. 5 is a schematic diagram of the structure of the second conductive part installed on the support provided by the embodiments of the present application;

[0035] Fig. 6 is another perspective view of the support provided by the embodiments of the present application;

[0036] Fig. 7 is a structural schematic diagram of the bracket and the capacitor assembly after assembly according to an embodiment of the present application.

[0037] Label explanation: 1 - shell; 2 - cover; 3 - bracket; 31 - electric fence; 32 - let hole; 33 - reinforcing rib; 34 - first positioning part; 35 - support wall; 36 - fixed wall; 37 - fixed part; 4 - conductive assembly; 41 - first conductive part; 42 - second conductive part; 421 - extension part; 422 - heat shrink tube; 43 - spot welding; 5 - wiring assembly; 6 - capacitor assembly; 61 - second positioning part; 62 - positioning cover. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0040] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The capacitor may be damaged during use. In a metallized film capacitor, the capacitor assembly is usually arranged in a sealed shell. When the two electrodes of the capacitor assembly are permanently broken, the metallized film is vaporized, the internal pressure of the shell is increased to cause the shell to expand and deform, and there is a certain risk of explosion. At this time, if the capacitor assembly is still in a short circuit state, it will affect the safety of the surrounding electrical components.

[0044] Based on this, the present application provides a capacitor protection assembly and a capacitor, which can improve the protection capability of the capacitor and reduce the probability of explosion of the capacitor due to failure.

[0045] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0046] Please refer to FIG. 1 to FIG. 3, the present embodiment provides a capacitor protection assembly, including a shell 1, a cover 2, a bracket 3 and a conductive assembly 4. The shell 1 has a containing cavity for placing a capacitor assembly 6. The cover 2 is arranged at the opening of the containing cavity. The bracket 3 is installed on the cover 2, and the bracket 3 is at least partially in the containing cavity. The conductive assembly 4 includes a first conductive piece 41 and a second conductive piece 42 connected with each other, the first conductive piece 41 is directly or indirectly connected with the cover 2, and the second conductive piece 42 is installed on the bracket 3. The bracket 3 is provided with an electrical fence 31, the electrical fence 31 is arranged on the side of the second conductive piece 42, and when the capacitor assembly 6 fails, the cover 2 expands in a direction away from the bracket 3, and the first conductive piece 41 is disconnected from the second conductive piece 42.

[0047] Based on the above-mentioned embodiments of the present application, by arranging the bracket 3 between the cover 2 and the capacitor assembly 6, connecting the second conductive piece 42 between the bracket 3 and the capacitor assembly 6, and connecting the first conductive piece 41 between the cover 2 and the second conductive piece 42, when the capacitor assembly 6 fails and the shell 1 and the cover 2 expand and deform, the cover 2 can drive the first conductive piece 41 to move, so that the first conductive piece 41 is separated from the second conductive piece 42, thereby disconnecting the electrical connection in the capacitor, and reducing the possibility of explosion of the capacitor.

[0048] The rigidity of the bracket 3 itself and the support provided by the electric fence 31 can effectively reduce the deformation of the bracket 3 caused by high temperature and high pressure, so that the bracket 3 can maintain stable shape and structure when the capacitor fails, thereby fixing the position of the second conductive part 42, so that the first conductive part 41 and the second conductive part 42 can be disconnected in time, preventing the capacitor assembly 6 from further damage and explosion. Therefore, this arrangement can significantly improve the safety of the capacitor.

[0049] Referring to FIG. 1, specifically, the shell 1 is one of the components for mounting and protecting the capacitor assembly 6, and is generally made of metal material, such as aluminum, iron, etc. The shell 1 can be cylindrical or other shapes, and the embodiment adopts a cylindrical shell 1. Since the side wall of the cylindrical shell 1 is enclosed into a circle, the deformation of the shell 1 is minimized when the shell 1 expands due to the gas generated inside, so that the deformation amount of the cover 2 can promote the first conductive part 41 and the second conductive part 42 to be disconnected in time.

[0050] Referring to FIGS. 2 and 3, the cover 2 is arranged at the barrel opening of the cylindrical shell 1, and is used to close the containing cavity of the shell 1. The capacitor assembly 6 in the closed containing cavity can avoid the influence of the external environment on the capacitor assembly 6, thereby improving the safety of the capacitor assembly 6.

[0051] The edge of the cover 2 is provided with a first folded edge, and the barrel opening of the shell 1 is provided with a second folded edge. The cover 2 is arranged at the barrel opening and is sealed and connected through the engagement of the first folded edge and the second folded edge. The cover 2 also has a sunken part, which is partially in the containing cavity. The side wall of the sunken part abuts against the inner wall of the containing cavity, which can limit the deformation direction of the cover 2.

[0052] The bottom wall of the sunken part is connected with the first conductive part 41. When the cover 2 expands, the bottom wall of the sunken part bulges out of the containing cavity, thereby driving the first conductive part 41 to move out of the containing cavity, so as to disconnect the first conductive part 41 and the second conductive part 42. The sunken part provides a margin for the expansion deformation of the cover 2, preventing the cover 2 from being broken quickly, and providing sufficient moving distance for the first conductive part 41, so as to separate the first conductive part 41 and the second conductive part 42.

[0053] Referring to FIGS. 2 and 3, the bracket 3 is a structural part for fixing the second conductive part 42, and has a support wall 35 and a fixed wall 36. The fixed wall 36 is parallel to the cover 2, and the second conductive part 42 is fixedly connected to the fixed wall 36. The support wall 35 is arranged on the circumferential side of the fixed wall 36 and abuts against the circumferential side of the sunken part of the cover 2. Since the circumferential side wall of the sunken part abuts against the inner wall of the containing cavity, the bracket 3 hardly deviates when the cover 2 expands and deforms, and the fixed wall 36 and the second conductive part 42 connected to the fixed wall 36 also hardly deviate, thereby ensuring that the first conductive part 41 can be disconnected from the second conductive part 42 in time.

[0054] In some examples, referring to FIGS. 4 and 5, the electric fence 31 includes a plurality of partitions arranged at intervals on the side of the support 3 close to the capacitor assembly 6, and the partitions extend from the support 3 to the capacitor assembly 6. The circumferential side of the second conductive member 42 is provided with at least two partitions.

[0055] Based on the above-described embodiments of the present application, the plurality of partitions arranged at intervals on the side of the support 3 close to the capacitor assembly 6 can improve the deformation resistance of the support 3, prevent the support 3 from deforming, and improve the structural stability of the support 3. In addition, the plurality of partitions arranged on the circumferential side of the second conductive member 42 can separate the second conductive members 42 from each other.

[0056] In some examples, referring to FIG. 5, the second conductive member 42 is provided in plurality, and the second conductive members 42 are arranged correspondingly between two partitions.

[0057] Based on the above-described embodiments of the present application, the plurality of second conductive members 42 correspond to the positive and negative electrodes of the capacitor, respectively, and the second conductive member 42 corresponding to the positive electrode and the second conductive member 42 corresponding to the negative electrode are arranged between different two partitions, respectively. Such an arrangement can separate the second conductive members 42 corresponding to different electrodes by the partitions of the electric fence 31, reduce the influence between the second conductive members 42, and improve the use safety of the capacitor.

[0058] In the electric fence 31 of the present embodiment, two parallel partitions form a group, and there are two groups of partitions in total. The two groups of partitions are arranged on the side of the support 3 close to the capacitor assembly 6 and extend to the capacitor assembly 6 at the same time, and the two groups of partitions are perpendicular to each other. Two second conductive members 42 are arranged between the first group of parallel partitions to correspond to the positive electrode of the capacitor, and one second conductive member 42 is arranged between the second group of partitions to correspond to the negative electrode of the capacitor.

[0059] Referring to FIG. 5, the second conductive member 42 is further provided with a heat shrink tube 422, which is sleeved on the position between the spot-welded portion and the extension portion 421 of the second conductive member 42. The heat shrink tube 422 can play a role of inter-electrode insulation, and further improve the use safety of the capacitor.

[0060] In some examples, referring to FIG. 6, the side of the support 3 facing the cover 2 is provided with at least one reinforcing rib 33.

[0061] Based on the above embodiments of the present application, the arrangement of the reinforcing rib 33 can improve the structural stability of the bracket 3, so that the bracket 3 is not prone to deformation after the capacitor fails, and the second conductive part 42 fixed on the bracket 3 can be kept in the set position, so that the first conductive part 41 can be timely disconnected from the second conductive part 42 when moving with the cover 2.

[0062] In the present embodiment, the reinforcing rib 33 is arranged on the side of the fixing wall 36 of the bracket 3 facing the cover 2 and is connected with the supporting wall 35. Such arrangement can simultaneously improve the rigidity of the fixing wall 36 and the supporting wall 35, reduce the deformation amount of the fixing wall 36 and the supporting wall 35, and ensure that the bracket 3 as a whole is not prone to deformation, thereby facilitating the timely disconnection of the welding point between the first conductive part 41 and the second conductive part 42.

[0063] In some examples, referring to FIGS. 4-6, the bracket 3 is provided with a clearance hole 32, and the side of the bracket 3 close to the capacitor assembly 6 is connected with the second conductive part 42, and the first conductive part 41 can pass through the clearance hole 32 to be connected with the second conductive part 42.

[0064] The second conductive part 42 is arranged on the side of the bracket 3 away from the cover 2, and the bracket 3 is provided with a clearance hole 32 adapted to the first conductive part 41, and the first conductive part 41 passes through the clearance hole 32 and is spot-welded to the second conductive part 42.

[0065] Based on the above embodiments of the present application, the second conductive part 42 on the side of the bracket 3 away from the cover 2 can be blocked by the bracket 3. When the cover 2 expands and deforms and drives the first conductive part 41 to move, the first conductive part 41 can be timely disconnected from the spot-welding position 43 of the second conductive part 42, preventing the first conductive part 41 from driving the second conductive part 42 to deviate at the same time.

[0066] Referring to FIGS. 4 and 5, the clearance hole 32 provided on the bracket 3 is used for the first conductive part 41 to pass through the bracket 3 and be connected with the second conductive part 42. The provision of the clearance hole 32 can assist in positioning the spot-welding position, preventing the first conductive part 41 from being welded to deviate from the second conductive part 42. On the other hand, the clearance hole 32 can limit the activity range of the first conductive part 41, preventing the first conductive part 41 from deviating during movement, and facilitating the timeliness and accuracy of the disconnection of the first conductive part 41 and the second conductive part 42.

[0067] Referring to FIG. 6, a plurality of clearance holes 32 are provided, and the plurality of clearance holes 32 correspond to the spot-welding positions of the plurality of first conductive parts 41 and the second conductive part 42. In addition, the clearance hole 32 is located close to the center of the bracket 3, and a fixing part 37 is arranged on the side of the clearance hole 32 away from the center of the bracket 3, and the second conductive part 42 is fixed on the fixing part 37. The extension part 421 of the second conductive part 42 extends from the fixing part 37 to the outer circle of the bracket 3, and extends to the position of the capacitor assembly 6 and is connected with the capacitor assembly 6.

[0068] Referring to FIG. 5, the fixing portion 37 is arranged on the side of the positioning hole 32 away from the center of the support 3, so that the spot-welded portion of the second conductive member 42 is separated from the extended portion 421, the influence of the extended portion 421 on the spot-welded portion is reduced, and the spot-welded portion 43 is prevented from being disconnected due to shaking or deviation of the extended portion 421 of the second conductive member 42, so that the stability of the spot-welded portion 43 is effectively improved, and the stability of the capacitor is improved.

[0069] Referring to FIG. 5, the fixing portion 37 is a threaded hole arranged on the support 3, and the second conductive member 42 is fixedly connected to the support 3 by a threaded fastener. Of course, the fixing portion 37 can also be arranged in a form of adhesion or welding, which can also reduce the influence of the extended portion 421 of the second conductive member 42 on the stability of the spot-welded portion.

[0070] In some examples, referring to FIG. 3, the second conductive member 42 extends towards the capacitor assembly 6, and the extended portion 421 of the second conductive member 42 is electrically connected to the capacitor assembly 6.

[0071] Based on the above-mentioned embodiments of the present application, compared with the prior art in which the capacitor assembly 6 and the second conductive member 42 are electrically connected by an electrical connection member, the present embodiment directly connects the extended portion 421 of the second conductive member 42 to the capacitor assembly 6, has higher electrical connection stability, has a simple arrangement form, can save the cost of arranging other electrical connection members, and can reduce the probability of failure of the capacitor.

[0072] In some examples, referring to FIG. 3, the second conductive member 42 is usually arranged as a copper foil, the main body portion of the copper foil is fixedly connected to the support 3, the first conductive member 41 is connected to the main body of the copper foil fixed to the support 3, and the extended portion 421 of the copper foil extends towards the capacitor assembly 6 and is electrically connected to the capacitor assembly 6 to realize conduction inside the capacitor.

[0073] In some examples, referring to FIG. 1 to FIG. 3, the wiring assembly 5 is arranged on the side of the cover 2 away from the support 3, the first end of the first conductive member 41 is connected to the wiring assembly 5, and the second end of the first conductive member 41 is spot-welded to the second conductive member 42. The cover 2 expands in the direction away from the support 3, the wiring assembly 5 drives the first conductive member 41 away from the second conductive member 42, so that the spot-welded portion 43 is disconnected.

[0074] Based on the above-mentioned embodiments of the present application, the wiring assembly 5 is arranged on the cover 2 and outside the shell 1, and the wiring assembly 5 is electrically connected with the first conductive part 41 and the second conductive part 42. When the cover 2 is deformed by swelling, the first end of the first conductive part 41 will move with the wiring assembly 5 away from the support 3, so that the second end of the first conductive part 41 is disconnected from the spot welding part 43 of the second conductive part 42, so as to realize the disconnection of the internal electrical connection of the capacitor, and reduce the possibility of further explosion of the capacitor. This arrangement has the advantages of simple structure, easy assembly and timely disconnection of electrical connection.

[0075] In some examples, referring to FIGS. 3-5, the support 3 is provided with a first positioning part 34, which is arranged on the side of the support 3 close to the capacitor assembly 6. The capacitor assembly 6 is provided with a second positioning part 61, and the first positioning part 34 can be connected to the second positioning part 61.

[0076] Based on the above-mentioned embodiments of the present application, the first positioning part 34 and the second positioning part 61 cooperate with each other to assist in positioning the position of the capacitor assembly 6 in the accommodating cavity through the support 3, which is beneficial to improve the installation stability of the capacitor assembly 6 in the shell 1.

[0077] Specifically, the cooperation between the first positioning part 34 and the second positioning part 61 can be in multiple forms. For example, the first positioning part 34 is a clamping protrusion arranged on the support 3, and the second positioning part 61 is a clamping groove arranged on the capacitor assembly 6. During the assembly of the capacitor, the clamping protrusion and the clamping groove are clamped correspondingly, so as to realize the positioning between the support 3 and the capacitor assembly 6. Since the supporting wall 35 of the support 3 abuts against the inner wall of the accommodating cavity and the cover 2, the support 3 can play a positioning role on the capacitor assembly 6, so that the capacitor assembly 6 is positioned and installed in the accommodating cavity, preventing the capacitor assembly 6 from shaking in the accommodating cavity, and improving the installation stability of the capacitor assembly 6.

[0078] In the present embodiment, referring to FIGS. 3 and 4, the first positioning part 34 is arranged as a positioning column, and the second positioning part 61 is arranged as a positioning hole. The positioning column and the positioning hole are inserted to play a positioning role on the capacitor assembly 6. This cooperation form is simple in structure and convenient for assembly.

[0079] In some examples, referring to FIG. 3, the first positioning part 34 is arranged at a central position on the side of the support 3 close to the capacitor assembly 6, and the second positioning part 61 is arranged at a central position on the side of the capacitor assembly 6 close to the support 3. The first positioning part 34 is connected to the second positioning part 61 correspondingly to make the capacitor assembly 6 and the support 3 relatively central.

[0080] Based on the above embodiments of the application, the first positioning portion 34 is arranged at the central position of the bracket 3, and the corresponding second positioning portion 61 is arranged at the central position of the capacitor assembly 6, so that the capacitor assembly 6 is located at the central position of the bracket 3 after assembly, and at the same time, the capacitor assembly 6 is located at the central position of the accommodating cavity, which can make the capacitor assembly 6 keep the same distance from the side wall of the shell 1, avoid the contact between the capacitor assembly 6 and the side wall of the shell 1 to cause the short circuit of the capacitor, and further enhance the protection of the capacitor assembly 6 to reduce the risk of explosion of the capacitor caused by the failure of the capacitor assembly 6.

[0081] Specifically, referring to FIGS. 4 and 5, the first positioning portion 34 is arranged on the electric fence 31, and a supporting surface is arranged on the baffle at the central position of the electric fence 31, and the first positioning portion 34 is arranged on the supporting surface, which can avoid affecting the installation of the second conductive part 42, and at the same time, can prevent the electric arc between the capacitor assembly 6 and the bracket 3, and improve the safety of the capacitor assembly 6.

[0082] In a second aspect, referring to FIGS. 1 to 7, the application further provides a capacitor, which comprises the capacitor assembly 6 and the above-mentioned capacitor protection assembly, and the capacitor assembly 6 is installed in the capacitor protection assembly.

[0083] Based on the above embodiments of the application, the capacitor with the above-mentioned capacitor protection assembly has higher safety. When the capacitor assembly 6 fails, the rapid increase of the gas pressure and temperature in the shell 1 will cause the expansion deformation of the shell 1 and the cover 2. In the process of the expansion deformation of the cover 2, the first conductive part 41 connected to the cover 2 will move away from the second conductive part 42. Since the reinforcing ribs 33 and the electric fence 31 arranged on the bracket 3 can improve the rigidity of the bracket 3 to reduce the deformation amount of the bracket 3 when the capacitor fails, the second conductive part 42 can be kept at the arranged position, and then the spot welding part 43 between the first conductive part 41 and the second conductive part 42 is pulled off, so that the internal electrical connection of the capacitor is disconnected, and the purpose of explosion-proof of the capacitor is achieved.

[0084] Specifically, referring to FIGS. 2 and 3, the capacitor assembly 6 comprises at least one capacitor arranged in the accommodating cavity, wherein the capacitor close to the bracket 3 is provided with the second positioning portion 61 which can cooperate with the first positioning portion 34 on the bracket 3 to be fixed at the central position of the shell 1, and a connecting part is arranged between each capacitor arranged in sequence, and the connecting part is also arranged at the central position of the capacitor, so that each capacitor arranged in sequence is kept at the central position of the shell 1, and the same gap between the capacitor assembly 6 and the side wall of the shell 1 is ensured, which is beneficial to the filling of the heat dissipation medium and the uniform heat dissipation of the capacitor assembly 6.

[0085] In addition, referring to FIG. 7, the housing 1 is further provided with a positioning cover 62, which is arranged in the accommodating cavity away from the cover 2. The positioning cover 62 can position the capacitor away from the support 3 in the capacitor assembly 6, and together with the support 3, the capacitor assembly 6 is positioned at the center position in the accommodating cavity, further improving the assembly stability of the capacitor assembly 6.

[0086] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A capacitive protection assembly, characterized by The application relates to a capacitor protection assembly. The capacitor protection assembly comprises a shell, a cover, a support, a conductive assembly and an electrical fence. The shell has a receiving cavity for placing a capacitor assembly. The cover covers an opening of the receiving cavity. The support is installed on the cover and at least partially located in the receiving cavity. The conductive assembly comprises a first conductive part and a second conductive part connected with each other.

2. The capacitive protection assembly of claim 1, wherein, The first conductive part is directly or indirectly connected with the cover. The second conductive part is installed on the support.

3. The capacitive protection assembly of claim 2, wherein, The electrical fence is arranged on the support and around the second conductive part.

4. The capacitive protection assembly of claim 1, wherein, When the capacitor assembly fails, the cover expands towards a direction away from the support, and the first conductive part is disconnected with the second conductive part.

5. The capacitive protection assembly of claim 1, wherein, The electrical fence comprises a plurality of partitions arranged at intervals.

6. The capacitive protection assembly of claim 1, wherein, The partitions are located on a side of the support close to the capacitor assembly and extend from the support to the capacitor assembly.

7. The capacitive protection assembly of claim 1, wherein, The second conductive part is provided with at least two partitions. The second conductive part is provided with a plurality of second conductive parts arranged between two partitions.

8. The capacitive protection assembly of claim 1, wherein, At least one reinforcing rib is arranged on a side of the support close to the cover.

9. The capacitive protection assembly of claim 8, wherein, A clearance hole is arranged on the support.

10. A capacitor characterized by The first conductive part can pass through the clearance hole and be connected with the second conductive part. The second conductive part extends towards the capacitor assembly. An extension part of the second conductive part is electrically connected to the capacitor assembly. A wiring assembly is arranged on a side of the cover away from the support. A first end of the first conductive part is connected with the wiring assembly. A second end of the first conductive part is spot-welded with the second conductive part. When the cover expands towards a direction away from the support, the wiring assembly drives the first conductive part away from the second conductive part, so that the spot-welded part is disconnected. A first positioning part is arranged on the support. The first positioning part is arranged on a side of the support close to the capacitor assembly. A second positioning part is arranged on the capacitor assembly. The first positioning part is connected with the second positioning part. The capacitor assembly and the capacitor protection assembly are arranged in the capacitor protection assembly. The capacitor protection assembly is arranged in the capacitor protection assembly.

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