Capacitor protection assembly and capacitor

Abstract

The utility model discloses a capacitor protection assembly and a capacitor, and relates to the technical field of capacitors, and the capacitor protection assembly comprises a housing, a cover body, a support, and a conductive assembly. The shell is provided with a containing cavity for containing the capacitor assembly. The cover body is arranged at the opening of the containing cavity in a covering mode. The support is installed on the cover body, and at least part of the support is located in the containing cavity. The conductive assembly comprises a first conductive part and a second conductive part which are connected, the first conductive part is directly or indirectly connected with the cover body, and the second conductive part is installed on the support. The support is provided with an electric fence, the electric fence is arranged on the peripheral side of the second conductive part, when the capacitor assembly breaks down, the cover body expands in the direction away from the support, and the first conductive part and the second conductive part are disconnected. According to the capacitor protection assembly, the capacitor protection capability can be improved, and the fault probability of the capacitor is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of capacitors, and in particular to a capacitor protection component and a capacitor. Background Art

[0002] A capacitor is a device that holds electric charge. When the internal capacitor components age or are damaged during use, the air pressure and temperature inside the capacitor shell will increase rapidly, and when they reach a certain level, the capacitor will explode.

[0003] In the prior art, a protective structure is provided inside the capacitor, and the protective structure can protect the capacitor assembly. When a capacitor fails, the protective structure can disconnect the internal electrical connection of the capacitor, thereby preventing explosion.

[0004] However, due to the poor stability of the existing protection structure and the weak protection capability for the capacitor components, the safety of capacitor use is low. Utility Model Content

[0005] The purpose of the present application is to provide a capacitor protection component and a capacitor, which can improve the protection capability of the capacitor and reduce the probability of capacitor failure.

[0006] In a first aspect, an embodiment of the present application provides a capacitor protection assembly, comprising: a shell, a cover body, a bracket and a conductive assembly. The shell has a housing cavity for placing the capacitor assembly. The cover body is arranged at the opening of the housing cavity. The bracket is mounted on the cover body, and the bracket is at least partially in the housing cavity. The conductive assembly includes 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 bracket. An electrical fence is arranged on the bracket, and the electrical fence is arranged on the peripheral side of the second conductive member. When the capacitor assembly fails, the cover body expands in a direction away from the bracket, and the first conductive member is disconnected from the second conductive member.

[0007] Based on the above-mentioned embodiments of the present application, by setting a bracket between the cover body and the capacitor assembly, the second conductive member is connected between the bracket and the capacitor assembly, and the first conductive member is connected between the cover body and the second conductive member. When the capacitor assembly fails and causes the shell and the cover body to expand and deform, the cover body can drive the first conductive member to move to separate the first conductive member from the second conductive member, thereby disconnecting the electrical connection inside the capacitor and reducing the possibility of capacitor explosion.

[0008] Among them, the rigidity of the bracket itself and the support provided by the electrical fence can effectively reduce the deformation effect of high temperature and high pressure on the bracket, so that the bracket can maintain a stable shape and structure when the capacitor fails, and play a role in fixing the position of the second conductive member, so that the first conductive member and the second conductive member can be disconnected in time to prevent the capacitor assembly from further damage and explosion. Therefore, this setting form can significantly improve the safety of the capacitor.

[0009] In a possible design, the electric fence includes a plurality of spacers arranged at intervals, the plurality of spacers are located on a side of the bracket close to the capacitor assembly, and the spacers extend from the bracket toward the capacitor assembly. At least two spacers are arranged around the second conductive member.

[0010] Based on the above-mentioned embodiments of the present application, multiple partitions are arranged at intervals on the side of the bracket close to the capacitor assembly to improve the deformation resistance of the bracket, prevent the bracket from deforming, and improve the structural stability of the bracket. It can also block between the capacitor assembly and the bracket to prevent arcing between the capacitor assembly and the bracket, thereby improving the safety of the capacitor assembly. In addition, multiple partitions are arranged on the peripheral side of the second conductive member to separate the second conductive member and avoid the impact between the second conductive members.

[0011] In a possible design, a plurality of second conductive members are provided, and the second conductive members are correspondingly arranged between two partitions.

[0012] Based on the above-mentioned embodiments of the present application, multiple second conductive members correspond to the positive electrode and the negative electrode of the capacitor respectively, and the second conductive member corresponding to the positive electrode and the second conductive member corresponding to the negative electrode are respectively arranged between two different partitions. Such an arrangement can separate the second conductive members corresponding to different electrodes through the partition of the electrical fence, reduce the influence between the second conductive members, and improve the safety of the capacitor.

[0013] In a possible design, at least one reinforcing rib is provided on a side of the bracket facing the cover body.

[0014] Based on the above-mentioned embodiments of the present application, the provision of reinforcing ribs can improve the structural stability of the bracket, so that the bracket is not easily deformed after a capacitor failure, and the second conductive member fixed on the bracket can be maintained in the set position so that the first conductive member can be disconnected from the second conductive member in time when moving with the cover body.

[0015] In a possible design, a clearance hole is opened on the bracket, and a side of the bracket close to the capacitor component is connected to the second conductive member, and the first conductive member can pass through the clearance hole to be connected to the second conductive member.

[0016] Based on the above-mentioned embodiments of the present application, the second conductive member can be blocked by the bracket on the side of the bracket facing away from the cover body. When the cover body expands and deforms and drives the first conductive member to move, the spot welding point between the first conductive member and the second conductive member can be disconnected in time to prevent the first conductive member from driving the second conductive member to deviate at the same time.

[0017] In a possible design, the second conductive member extends toward the capacitor component, and the extended portion of the second conductive member is electrically connected to the capacitor component.

[0018] Based on the above-mentioned embodiments of the present application, compared with the previous method of realizing the electrical connection between the capacitor component and the second conductive component through an electrical connector, the present embodiment adopts the form of directly connecting the extended part of the second conductive component to the capacitor component, which has higher electrical connection stability and a simple setting form. It can also save the cost of setting other electrical connectors and reduce the probability of capacitor failure.

[0019] In a possible design, a wiring assembly is provided on the side of the cover body away from the bracket, the first end of the first conductive member is connected to the wiring assembly, and the second end of the first conductive member is spot-welded to the second conductive member. When the cover body expands in a direction away from the bracket, the wiring assembly drives the first conductive member away from the second conductive member, so that the spot welding is disconnected.

[0020] Based on the above-mentioned embodiment of the present application, the wiring assembly is arranged on the cover body and is located outside the housing. The wiring assembly is electrically connected to the second conductive member through the first conductive member. When the cover body expands and deforms, the first end of the first conductive member moves with the wiring assembly in a direction away from the bracket, so that the second end of the first conductive member is disconnected from the spot welding point of the second conductive member, so as to disconnect the internal electrical connection of the capacitor and reduce the possibility of further explosion of the capacitor. This arrangement has a simple structure, is easy to assemble, and is conducive to timely disconnection of the electrical connection.

[0021] In a possible design, a first positioning portion is provided on the bracket, and the first positioning portion is provided on a side of the bracket close to the capacitor assembly. A second positioning portion is provided on the capacitor assembly, and the first positioning portion can be correspondingly connected to the second positioning portion.

[0022] Based on the above-mentioned embodiments of the present application, the first positioning portion and the second positioning portion cooperate with each other to assist in positioning the capacitor assembly in the accommodating cavity through the bracket, which is beneficial to improving the installation stability of the capacitor assembly in the shell.

[0023] In one possible design, the first positioning portion is arranged at a central position on one side of the bracket close to the capacitor assembly, and the second positioning portion is arranged at a central position on one side of the bracket close to the capacitor assembly. The first positioning portion and the second positioning portion are correspondingly connected to each other so that the capacitor assembly and the bracket are relatively centered.

[0024] Based on the above-mentioned embodiments of the present application, the first positioning portion is set at the center position of the bracket, and the corresponding second positioning portion is set at the center position of the capacitor assembly, so that after assembly, the capacitor assembly is located at the center position of the bracket, and at the same time, the capacitor assembly is located at the center position of the accommodating cavity. In this way, the capacitor assembly can maintain the same distance from the side wall of the shell, avoiding the capacitor assembly from contacting the side wall of the shell to cause capacitor short circuit and other faults, further enhancing the protection of the capacitor assembly to reduce the risk of capacitor explosion due to capacitor assembly failure.

[0025] In a second aspect, an embodiment of the present application further provides a capacitor, comprising a capacitor component and the above-mentioned capacitor protection component, wherein the capacitor component is installed in the capacitor protection component.

[0026] Based on the above-mentioned embodiments of the present application, the capacitor with the above-mentioned capacitor protection component has a high safety. When the capacitor component fails, the rapidly increasing air pressure and temperature in the shell will cause the shell and the cover to expand and deform. During the process of the cover expanding and deforming, the first conductive member connected to the cover will be driven to move away from the second conductive member. Since the reinforcing ribs and electrical fences set on the bracket can increase the rigidity of the bracket to reduce the deformation of the bracket when the capacitor fails, the second conductive member can be maintained in the set position, and then the spot welding between the first conductive member and the second conductive member is broken, thereby disconnecting the internal electrical connection of the capacitor, thereby achieving the purpose of explosion-proofing the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the capacitor provided in an embodiment of the present application.

[0029] Figure 2 An exploded diagram of a capacitor provided in an embodiment of the present application.

[0030] Figure 3 A cross-sectional view of a capacitor provided in an embodiment of the present application.

[0031] Figure 4 This is one of the viewing angles of the bracket provided in the embodiment of the present application.

[0032] Figure 5 A schematic diagram of the structure in which the second conductive member provided in an embodiment of the present application is installed on a bracket.

[0033] Figure 6 Another perspective of the bracket provided in an embodiment of the present application.

[0034] Figure 7 A schematic diagram of the structure of the bracket and capacitor assembly after assembly provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1-shell; 2-cover; 3-bracket; 31-electric fence; 32-clearance hole; 33-reinforcement rib; 34-first positioning portion; 35-support wall; 36-fixed wall; 37-fixed portion; 4-conductive component; 41-first conductive member; 42-second conductive member; 421-extension portion; 422-heat shrink tube; 43-spot welding point; 5-wiring component; 6-capacitor component; 61-second positioning portion; 62-positioning cover. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part 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 here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Capacitors may be damaged during use. In metallized film capacitors, the capacitor assembly is usually set in a sealed shell. When the two electrodes of the capacitor assembly are permanently punctured, the metallized film vaporizes, and the air pressure in the shell increases, causing the shell to expand and deform, posing 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 surrounding electrical components.

[0043] Based on this, the embodiments of the present application provide a capacitor protection component and a capacitor, which can improve the protection capability of the capacitor and reduce the probability of the capacitor exploding due to failure.

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0045] Please refer to Figures 1 to 3 , this embodiment provides a capacitor protection component, including a shell 1, a cover body 2, a bracket 3 and a conductive component 4. The shell 1 has a accommodating cavity for placing the capacitor component 6. The cover body 2 is covered at the opening of the accommodating cavity. The bracket 3 is installed on the cover body 2, and the bracket 3 is at least partially in the accommodating cavity. The conductive component 4 includes a first conductive member 41 and a second conductive member 42 that are connected to each other, the first conductive member 41 is directly or indirectly connected to the cover body 2, and the second conductive member 42 is installed on the bracket 3. An electrical fence 31 is provided on the bracket 3, and the electrical fence 31 is provided on the peripheral side of the second conductive member 42. When the capacitor component 6 fails, the cover body 2 expands in a direction away from the bracket 3, and the first conductive member 41 is disconnected from the second conductive member 42.

[0046] Based on the above-mentioned embodiments of the present application, by setting a bracket 3 between the cover body 2 and the capacitor assembly 6, the second conductive member 42 is connected between the bracket 3 and the capacitor assembly 6, and the first conductive member 41 is connected between the cover body 2 and the second conductive member 42. When the capacitor assembly 6 fails and causes the shell 1 and the cover body 2 to expand and deform, the cover body 2 can drive the first conductive member 41 to move so that the first conductive member 41 is separated from the second conductive member 42, thereby disconnecting the electrical connection inside the capacitor and reducing the possibility of capacitor explosion.

[0047] Among them, the rigidity of the bracket 3 itself and the support provided by the electric fence 31 can effectively reduce the deformation effect of the bracket 3 caused by high temperature and high pressure, so that the bracket 3 can maintain a stable shape and structure when the capacitor fails, and play a role in fixing the position of the second conductive member 42, so that the first conductive member 41 and the second conductive member 42 can be disconnected in time to prevent the capacitor assembly 6 from further damage and explosion. Therefore, this setting form can significantly improve the safety of the capacitor.

[0048] Reference Figure 1 Specifically, the housing 1 is one of the components for installing and protecting the capacitor assembly 6, and is generally made of metal materials, such as aluminum, iron, etc. The shape of the housing 1 can be cylindrical or other shapes. The present embodiment adopts a cylindrical housing 1. Since the side wall of the cylindrical housing 1 is enclosed in a circle, when gas is generated in the housing 1 to cause the housing 1 to expand, the deformation of the housing 1 is minimal, so that the deformation of the cover 2 can ensure that the first conductive member 41 and the second conductive member 42 are disconnected in time.

[0049] Reference Figure 2 and Figure 3 The cover body 2 is disposed at the mouth of the cylindrical shell 1 to seal the accommodating cavity of the shell 1. The capacitor assembly 6 is in the closed accommodating cavity to prevent the external environment from affecting the capacitor assembly 6, thereby improving the safety of the capacitor assembly 6.

[0050] The edge of the cover body 2 is provided with a first folded edge, the barrel opening of the shell 1 is provided with a second folded edge, the cover body 2 is covered at the barrel opening and sealed by the engagement of the first folded edge and the second folded edge. The cover body 2 also has a sinking portion, which is partially located in the accommodating cavity, and the side wall of the sinking portion abuts against the inner wall of the accommodating cavity, which can limit the deformation direction of the cover body 2.

[0051] The bottom wall of the sinking part is connected to the first conductive member 41. When the cover body 2 expands, the bottom wall of the sinking part bulges out of the accommodating cavity, thereby driving the first conductive member 41 to move out of the accommodating cavity, so that the first conductive member 41 is disconnected from the second conductive member 42. The setting of the sinking part leaves a margin for the expansion deformation of the cover body 2 to prevent the cover body 2 from breaking quickly, and at the same time provides a sufficient moving distance for the first conductive member 41 to separate from the second conductive member 42.

[0052] Reference Figure 2 and Figure 3The bracket 3 is a structural member for fixing the second conductive member 42, and has a supporting wall 35 and a fixing wall 36. The fixing wall 36 is parallel to the cover body 2. The second conductive member 42 is fixedly connected to the fixing wall 36. The supporting wall 35 is arranged on the peripheral side of the fixing wall 36 and abuts against the peripheral side of the sunken part of the cover body 2. Since the peripheral side wall of the sunken part abuts against the inner wall of the accommodating cavity, the bracket 3 hardly deviates when the cover body 2 expands and deforms, and the fixing wall 36 and the second conductive member 42 connected to the fixing wall 36 also do not deviate, thereby ensuring that the first conductive member 41 can be disconnected from the second conductive member 42 in time.

[0053] In some examples, reference Figure 4 and Figure 5 The electric fence 31 includes a plurality of spacers arranged at intervals, the plurality of spacers are located on a side of the bracket 3 close to the capacitor assembly 6, and the spacers extend from the bracket 3 to the capacitor assembly 6. At least two spacers are arranged around the second conductive member 42.

[0054] Based on the above-mentioned embodiments of the present application, multiple partitions are arranged at intervals on the side of the bracket 3 close to the capacitor assembly 6 to improve the deformation resistance of the bracket 3, prevent the bracket 3 from deformation, and improve the structural stability of the bracket 3. It can also block between the capacitor assembly 6 and the bracket 3 to prevent arcing between the capacitor assembly 6 and the bracket 3, thereby improving the safety of the capacitor assembly 6. In addition, multiple partitions are arranged on the peripheral side of the second conductive member 42 to separate the second conductive member 42 and avoid the second conductive members 42 from affecting each other.

[0055] In some examples, reference Figure 5 A plurality of second conductive members 42 are provided, and the second conductive members 42 are correspondingly provided between two partitions.

[0056] Based on the above-mentioned embodiments of the present application, multiple second conductive members 42 correspond to the positive electrode and the negative electrode 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 respectively arranged between two different partitions. Such an arrangement can separate the second conductive members 42 corresponding to different electrodes through the partition of the electrical fence 31, thereby reducing the influence between the second conductive members 42 and improving the safety of the capacitor.

[0057] In the electrical fence 31 of the present embodiment, two parallel partitions form a group, and two groups of partitions are provided in total. The two groups of partitions are provided on one side of the bracket 3 close to the capacitor assembly 6 and extend toward 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 provided between the first group of parallel partitions to correspond to the positive pole of the capacitor, and one second conductive member 42 is provided between the second group of partitions to correspond to the negative pole of the capacitor.

[0058] Reference Figure 5A heat shrink tube 422 is also provided on the second conductive member 42. The heat shrink tube 422 is sleeved between the spot welding portion of the second conductive member 42 and the extension portion 421, which can play a role in inter-electrode insulation and further improve the safety of the capacitor.

[0059] In some examples, reference Figure 6 At least one reinforcing rib 33 is provided on the side of the bracket 3 facing the cover body 2 .

[0060] Based on the above-mentioned embodiments of the present application, the setting of the reinforcing rib 33 can improve the structural stability of the bracket 3, so that the bracket 3 is not easily deformed after a capacitor failure, and the second conductive member 42 fixed on the bracket 3 can be maintained in the set position, so that the first conductive member 41 can be disconnected from the second conductive member 42 in time when moving with the cover body 2.

[0061] In this embodiment, the reinforcing rib 33 is arranged on the side of the fixed wall 36 of the bracket 3 facing the cover body 2, and is connected to the supporting wall 35. Such a setting can simultaneously improve the rigidity of the fixed wall 36 and the supporting wall 35, reduce the deformation of the fixed wall 36 and the supporting wall 35, and ensure that the bracket 3 as a whole is not easily deformed, thereby facilitating the timely disconnection of the welding point between the first conductive member 41 and the second conductive member 42.

[0062] In some examples, reference Figures 4 to 6 A clearance hole 32 is provided on the bracket 3 , and a side of the bracket 3 close to the capacitor assembly 6 is connected to the second conductive member 42 , and the first conductive member 41 can pass through the clearance hole 32 to be connected to the second conductive member 42 .

[0063] The second conductive member 42 is disposed on a side of the bracket 3 away from the cover 2 . The bracket 3 is provided with a clearance hole 32 adapted to the first conductive member 41 . The first conductive member 41 passes through the clearance hole 32 and is spot welded to the second conductive member 42 .

[0064] Based on the above-mentioned embodiments of the present application, the second conductive member 42 can be blocked by the bracket 3 on the side of the bracket 3 away from the cover body 2. When the cover body 2 expands and deforms and drives the first conductive member 41 to move, the spot welding point 43 between the first conductive member 41 and the second conductive member 42 can be disconnected in time to prevent the first conductive member 41 from driving the second conductive member 42 to deviate at the same time.

[0065] Reference Figure 4 and Figure 5The clearance hole 32 provided on the bracket 3 is used for the first conductive member 41 to pass through the bracket 3 and connect with the second conductive member 42. The provision of the clearance hole 32 can, on the one hand, assist in locating the spot welding position and prevent the first conductive member 41 and the second conductive member 42 from being welded off-center. On the other hand, the range of motion of the first conductive member 41 can be limited to prevent the first conductive member 41 from deflecting during movement, which is conducive to improving the timeliness and accuracy of the separation of the first conductive member 41 and the second conductive member 42.

[0066] Reference Figure 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 members 41 and the second conductive members 42. In addition, the clearance holes 32 are located close to the center of the bracket 3, and a fixing portion 37 is provided on the side of the clearance holes 32 away from the center of the bracket 3, and the second conductive member 42 is fixed on the fixing portion 37. The extension portion 421 of the second conductive member 42 extends from the fixing portion 37 to the outer ring of the bracket 3, and at the same time extends to the position of the capacitor assembly 6 and is connected to the capacitor assembly 6.

[0067] Reference Figure 5 By setting the fixing portion 37 on the side of the clearance hole 32 away from the center of the bracket 3, the spot welding part of the second conductive member 42 can be separated from the extension part 421, reducing the influence of the extension part 421 on the spot welding part, avoiding the breakage of the spot welding part 43 due to shaking or deviation of the extension part 421 of the second conductive member 42, effectively improving the stability of the spot welding part 43, thereby improving the stability of the capacitor.

[0068] Among them, refer to Figure 5 The fixing portion 37 is a threaded connection hole provided on the bracket 3, and the second conductive member 42 is fixedly connected to the bracket 3 by a threaded fastener. Of course, the fixing portion 37 can also be provided in a fixing form such as bonding or welding, which can also reduce the influence of the extension portion 421 of the second conductive member 42 on the stability of the spot welding portion.

[0069] In some examples, reference Figure 3 The second conductive member 42 extends toward the capacitor assembly 6 , and the extending portion 421 of the second conductive member 42 is electrically connected to the capacitor assembly 6 .

[0070] Based on the above-mentioned embodiments of the present application, compared with the previous method of realizing the electrical connection between the capacitor component 6 and the second conductive component 42 through an electrical connector, the present embodiment adopts the form of directly connecting the extended portion 421 of the second conductive component 42 to the capacitor component 6, which has higher electrical connection stability and a simple setting form. It can also save the cost of setting other electrical connectors and reduce the probability of capacitor failure.

[0071] Among them, the second conductive member 42 is usually set to be a copper foil, the main part of the copper foil is fixedly connected to the bracket 3, the first conductive member 41 is connected to the main body of the copper foil fixed on the bracket 3, and the extended part 421 of the copper foil extends toward the capacitor component 6 and is electrically connected to the capacitor component 6 to achieve conduction inside the capacitor.

[0072] In some examples, reference Figures 1 to 3 A wiring assembly 5 is provided on the side of the cover body 2 away from the bracket 3, a first end of the first conductive member 41 is connected to the wiring assembly 5, and a second end of the first conductive member 41 is spot-welded to the second conductive member 42. The cover body 2 expands in a direction away from the bracket 3, and the wiring assembly 5 drives the first conductive member 41 away from the second conductive member 42, so that the spot welding 43 is disconnected.

[0073] Based on the above-mentioned embodiment of the present application, the wiring assembly 5 is arranged on the cover 2 and outside the housing 1. The wiring assembly 5 is electrically connected to the second conductive member 42 through the first conductive member 41. When the cover 2 expands and deforms, the first end of the first conductive member 41 moves with the wiring assembly 5 in a direction away from the bracket 3, so that the second end of the first conductive member 41 and the spot welding point 43 of the second conductive member 42 are disconnected, so as to disconnect the internal electrical connection of the capacitor and reduce the possibility of further explosion of the capacitor. This arrangement has a simple structure, is easy to assemble, and is conducive to timely disconnection of the electrical connection.

[0074] In some examples, reference Figures 3 to 5 A first positioning portion 34 is provided on the bracket 3 , and the first positioning portion 34 is provided on a side of the bracket 3 close to the capacitor component 6 . A second positioning portion 61 is provided on the capacitor component 6 , and the first positioning portion 34 can be correspondingly connected to the second positioning portion 61 .

[0075] Based on the above-mentioned embodiments of the present application, the first positioning portion 34 and the second positioning portion 61 cooperate with each other to assist in positioning the capacitor assembly 6 in the accommodating cavity through the bracket 3, which is beneficial to improving the installation stability of the capacitor assembly 6 in the shell 1.

[0076] Specifically, the cooperation between the first positioning portion 34 and the second positioning portion 61 can be set in various forms. For example, the first positioning portion 34 is a snap-in protrusion arranged on the bracket 3, and the second positioning portion 61 is a snap-in groove arranged on the capacitor assembly 6. During the assembly of the capacitor, the snap-in protrusion is snapped into the snap-in groove accordingly to achieve the positioning between the bracket 3 and the capacitor assembly 6. Since the support wall 35 of the bracket 3 abuts against the inner wall of the accommodating cavity and the cover body 2, the bracket 3 can position the capacitor assembly 6, so that the capacitor assembly 6 is positioned and installed in the accommodating cavity, thereby preventing the capacitor assembly 6 from shaking in the accommodating cavity and improving the installation stability of the capacitor assembly 6.

[0077] In this embodiment, refer to Figure 3 and Figure 4 The first positioning portion 34 is set as a positioning column, and the second positioning portion 61 is set as a positioning hole. The positioning column and the positioning hole are plugged into each other to position the capacitor component 6. This matching form has a simple structure and is convenient for assembly.

[0078] In some examples, reference Figure 3 The first positioning portion 34 is arranged at the center position of the side of the bracket 3 close to the capacitor component 6, and the second positioning portion 61 is arranged at the center position of the side of the capacitor component 6 close to the bracket 3. The first positioning portion 34 is correspondingly connected to the second positioning portion 61 so that the capacitor component 6 and the bracket 3 are relatively centered.

[0079] Based on the above-mentioned embodiments of the present application, the first positioning portion 34 is set at the center position of the bracket 3, and the corresponding second positioning portion 61 is set at the center position of the capacitor assembly 6, so that after assembly, the capacitor assembly 6 is located at the center position of the bracket 3, and the capacitor assembly 6 is located at the center position of the accommodating cavity. In this way, the capacitor assembly 6 can maintain the same distance from the side wall of the shell 1, avoiding the capacitor assembly 6 from contacting the side wall of the shell 1 to cause capacitor short circuit and other faults, further enhancing the protection of the capacitor assembly 6 to reduce the risk of capacitor explosion due to failure of the capacitor assembly 6.

[0080] Specifically, refer to Figure 4 and Figure 5 The first positioning portion 34 is arranged on the electrical fence 31, and a supporting surface is arranged on the partition at the center position of the electrical fence 31. The first positioning portion 34 is arranged on the supporting surface. This arrangement can avoid affecting the installation of the second conductive member 42, and at the same time prevent the generation of an arc between the capacitor assembly 6 and the bracket 3, thereby improving the safety of the capacitor assembly 6.

[0081] Second, refer to Figures 1 to 7 The embodiment of the present application also provides a capacitor, including a capacitor component 6 and the above-mentioned capacitor protection component, and the capacitor component 6 is installed in the capacitor protection component.

[0082] Based on the above-mentioned embodiments of the present application, the capacitor with the above-mentioned capacitor protection assembly has a higher safety. When the capacitor assembly 6 fails, the rapidly increasing air pressure and temperature in the shell 1 will cause the shell 1 and the cover 2 to expand and deform. During the process of the cover 2 expanding and deforming, the first conductive member 41 connected to the cover 2 will be driven to move in a direction away from the second conductive member 42. Since the reinforcing ribs 33 and the electrical fence 31 provided on the bracket 3 can increase the rigidity of the bracket 3 to reduce the deformation of the bracket 3 when the capacitor fails, the second conductive member 42 can be maintained in the set position, and then the spot welding 43 between the first conductive member 41 and the second conductive member 42 is broken, thereby disconnecting the internal electrical connection of the capacitor, thereby achieving the purpose of explosion-proofing the capacitor.

[0083] Specifically, refer to Figure 2 and Figure 3 The capacitor assembly 6 includes at least one capacitor, and at least one capacitor is arranged in the accommodating cavity, wherein a second positioning portion 61 is provided on the capacitor close to the bracket 3, which can cooperate with the first positioning portion 34 on the bracket 3 to be fixed at the center position of the shell 1, and a connecting piece is also provided between each of the capacitors arranged in sequence, and the connecting piece is also arranged at the center position of the capacitor, so that each of the capacitors arranged in sequence is maintained at the center position of the shell 1, ensuring that there is the same gap between the capacitor assembly 6 and the side wall of the shell 1, which is conducive to the filling of the heat dissipation medium and the uniform heat dissipation of the capacitor assembly 6.

[0084] In addition, refer to Figure 7 A positioning cover 62 is also provided in the shell 1. The positioning cover 62 is arranged on a side of the accommodating cavity away from the cover body 2. The positioning cover 62 can position the capacitor in the capacitor assembly 6 away from the bracket 3, and together with the bracket 3, the capacitor assembly 6 is positioned at the center of the accommodating cavity, further improving the assembly stability of the capacitor assembly 6.

[0085] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 capacitor protection component, characterized in that: include: A housing having a housing for placing the capacitor assembly; A cover body, the cover body is arranged at the opening of the accommodating cavity; A bracket, mounted on the cover body, wherein at least a portion of the bracket is located in the accommodating cavity; A conductive component, comprising a first conductive member and a second conductive member connected to each other, wherein the first conductive member is directly or indirectly connected to the cover body, and the second conductive member is mounted on the bracket; The bracket is provided with an electric fence, and the electric fence is provided on the peripheral side of the second conductive member. When the capacitor assembly fails, the cover body expands in a direction away from the bracket, and the first conductive member is disconnected from the second conductive member.

2. The capacitor protection component according to claim 1, characterized in that: The electrical fence includes a plurality of spacers arranged at intervals, the plurality of spacers are located on a side of the bracket close to the capacitor assembly, and the spacers extend from the bracket toward the capacitor assembly; At least two partitions are arranged on the peripheral side of the second conductive member.

3. The capacitor protection component according to claim 2, characterized in that: A plurality of the second conductive members are provided, and the second conductive members are correspondingly arranged between two of the partitions.

4. The capacitor protection component according to claim 1, characterized in that: At least one reinforcing rib is disposed on a side of the bracket facing the cover body.

5. The capacitor protection component according to claim 1, characterized in that: The bracket is provided with a clearance hole, and a side of the bracket close to the capacitor assembly is connected to the second conductive member, and the first conductive member can pass through the clearance hole to be connected to the second conductive member.

6. The capacitor protection component according to claim 1, characterized in that: The second conductive member extends toward the capacitor component, and an extended portion of the second conductive member is electrically connected to the capacitor component.

7. The capacitor protection assembly according to claim 1, characterized in that: A wiring assembly is disposed on a side of the cover body away from the bracket, a first end of the first conductive member is connected to the wiring assembly, and a second end of the first conductive member is spot-welded to the second conductive member; The cover expands in a direction away from the bracket, and the wiring assembly drives the first conductive member away from the second conductive member to disconnect the spot welding.

8. The capacitor protection assembly according to claim 1, characterized in that: The bracket is provided with a first positioning portion, and the first positioning portion is provided on a side of the bracket close to the capacitor assembly. The capacitor assembly is provided with a second positioning portion, and the first positioning portion can be correspondingly connected to the second positioning portion.

9. The capacitor protection assembly according to claim 8, characterized in that: The first positioning portion is arranged at a central position of the bracket close to the capacitor assembly, and the second positioning portion is arranged at a central position of the capacitor assembly close to the bracket. The first positioning portion is correspondingly connected to the second positioning portion so that the capacitor assembly and the bracket are relatively centered.

10. A capacitor, characterized in that: It comprises a capacitor component and a capacitor protection component as described in any one of claims 1 to 9, wherein the capacitor component is installed in the capacitor protection component.

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