Capacitor upper cover assembly and capacitor

Abstract

The utility model belongs to the technical field of electronic devices, and discloses a capacitor upper cover assembly and a capacitor, the capacitor upper cover assembly comprises a cover body, a first connecting piece, a conducting strip, a discharge resistor and a second connecting piece, the first connecting piece is arranged on the cover body and is used for connecting an external lead; the conducting strip is positioned outside the cover body, sleeves the first connecting piece and is in conductive contact with the first connecting piece; the discharge resistor is positioned outside the cover body and is electrically connected with the conducting strip; and the second connecting piece is connected with the conducting strip and the cover body in a penetrating manner and is used for being electrically connected with a core in the shell. The discharge resistor is arranged outside the cover body, so that the heat generated by the discharge resistor is dissipated to the outside, thereby avoiding intensifying the temperature rise in the capacitor shell and increasing the resistance value of the discharge resistor due to the influence of high temperature, and prolonging the service life of the capacitor. The second connecting piece is used for fixing the conducting strip and electrically connecting the discharge resistor and the core in the shell, so that the structure of the upper cover assembly of the capacitor is more compact, the number of used parts can be reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, in particular to a capacitor upper cover assembly and a capacitor. Background Art

[0002] Low-voltage reactive power compensation power capacitors are applicable to power frequency AC power systems with a nominal voltage of 1000V or less, used to improve the power factor, reduce line losses, and improve voltage quality.

[0003] Existing capacitors generally include a housing with an opening at one end, an upper cover assembly arranged at the opening of the housing, a discharge resistor and a core arranged inside the housing. The discharge resistor and the core are electrically connected, and a wiring terminal for connecting an external lead is arranged on the upper cover assembly.

[0004] The existing technology has the following defects: during the use of the capacitor, complex grid conditions are likely to cause a rapid temperature rise of the internal discharge resistor of the capacitor, resulting in high temperature inside the capacitor, accelerating the aging of internal components, and affecting the service life of the capacitor. Moreover, the higher the temperature inside the capacitor, the greater the resistance value of the discharge resistor, affecting the normal operation of the capacitor. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a capacitor upper cover assembly and a capacitor, which can reduce the temperature rise of the discharge resistor in the capacitor, reduce the heat generation during the operation of the capacitor, effectively extend the service life of the capacitor, and have a compact and reasonable structure.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, a capacitor upper cover assembly is provided, including:

[0008] A cover body configured to be installed at the opening of the housing of the capacitor;

[0009] A first connecting member arranged on the cover body, the first connecting member being configured to connect an external lead;

[0010] A conductive sheet located outside the cover body, the conductive sheet being sleeved on the first connecting member and in conductive contact with the first connecting member;

[0011] A discharge resistor located outside the cover body and electrically connected to the conductive sheet;

[0012] A second connecting member passing through and connecting the conductive sheet and the cover body, the second connecting member being configured to be electrically connected to the core inside the housing.

[0013] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the second connecting member includes a connected stop portion and a penetrating portion. The penetrating portion penetrates through the conductive sheet and the cover body, and the stop portion stops on the side of the conductive sheet facing away from the cover body.

[0014] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the capacitor upper cover assembly further includes a lock nut and an explosion-proof member. The lock nut is screwed onto the penetrating portion and is located on the side of the cover body facing away from the conductive sheet. The explosion-proof member is arranged on the side of the cover body facing away from the conductive sheet. The second connecting member penetrates through the explosion-proof member, and an accommodation hole for accommodating the lock nut is arranged on the explosion-proof member.

[0015] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the first connecting member includes a connected embedding portion and a wiring portion.

[0016] The embedding portion is embedded in the cover body, and the surface of the embedding portion protrudes relative to the cover body. The cross-sectional area of the embedding portion is larger than the cross-sectional area of the wiring portion. The conductive sheet is sleeved on the wiring portion and is in conductive contact with the embedding portion.

[0017] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the capacitor upper cover assembly further includes a conductive washer, and the conductive washer is sleeved on the first connecting member.

[0018] The first connecting member is configured to penetrate through a wiring nut and a wiring nose of the external lead, and the conductive washer is configured to be pressed against the conductive sheet under the action of the wiring nut.

[0019] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the cover body includes an end cover and an insulating seat body.

[0020] The end cover is buckled to the opening of the housing. A limiting boss is annularly arranged on the end cover, and the limiting boss encloses a through hole. The insulating seat body is arranged outside the end cover. The first connecting member is arranged on the insulating seat body. The second connecting member penetrates through the insulating seat body and the through hole. A limiting groove is annularly arranged on the insulating seat body.

[0021] The limiting boss is inserted into the limiting groove.

[0022] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, there are three each of the conductive sheet, the discharge resistor, the first connecting member, and the second connecting member, and they correspond to each other one by one.

[0023] The three conductive sheets are arranged in a triangle, and two ends of the discharge resistor are respectively electrically connected to two adjacent conductive sheets.

[0024] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, each of the conductive sheets includes a connected positioning portion and a fixing portion; the positioning portion is sleeved on the first connecting member, and the second connecting member penetrates through the fixing portion; the fixing portions of the three conductive sheets are arranged side by side, and an insulating separation portion is convexly provided on the cover body between two adjacent fixing portions.

[0025] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the cover body includes an end cover and an insulating seat body; the end cover is buckled on the opening of the housing, the insulating seat body is arranged outside the end cover, and the first connecting member and the insulating separation portion are both arranged on the insulating seat body;

[0026] The capacitor upper cover assembly further includes a heat dissipation cover provided with heat dissipation holes; the heat dissipation cover covers outside the insulating seat body, and a through hole for passing through the first connecting member is provided on the heat dissipation cover;

[0027] A positioning plate is arranged on one side of the heat dissipation cover facing the insulating seat body, the insulating separation portion includes two spaced separation plates, a positioning groove is arranged on the insulating seat body between the two separation plates, and the positioning groove is inserted with the positioning plate; and / or, a buckle is arranged on one of the heat dissipation cover and the insulating seat body, and a clamping groove is arranged on the other, and the buckle is clamped with the clamping groove.

[0028] As an alternative solution of the capacitor upper cover assembly provided by the present utility model, the insulating seat body includes a bottom plate and a reinforcing boss convexly arranged on the bottom plate, the conductive sheet is located on the reinforcing boss, and the second connecting member penetrates through the reinforcing boss and the bottom plate;

[0029] The conductive sheet further includes a connecting portion connected to the positioning portion, the connecting portion extends out of the reinforcing boss and is electrically connected to the discharge resistor.

[0030] On the other hand, a capacitor is provided, which includes a housing, a core and the capacitor upper cover assembly as described above, the core is arranged in the housing, an opening is provided on the housing, and the capacitor upper cover assembly is buckled at the opening.

[0031] The beneficial effects of the present utility model:

[0032] The present utility model provides a capacitor upper cover assembly and a capacitor including the capacitor upper cover assembly. The capacitor upper cover assembly is buckled at the opening of the capacitor housing. The conductive sheet, the discharge resistor, and the second connecting member are electrically connected, and the second connecting member penetrates through the cover body to be electrically connected to the core in the housing, realizing the electrical connection between the discharge resistor and the core. The first connecting member is in conductive contact with the conductive sheet and is used to realize the connection of the external lead so as to connect the capacitor to the corresponding circuit. By arranging the discharge resistor outside the cover body, a large amount of heat generated by the discharge resistor during operation is directly dissipated to the outside world, and will not be transmitted to the inside of the housing, avoiding exacerbating the temperature rise inside the capacitor housing, slowing down the aging speed of components such as the core inside the housing, and prolonging the service life of the capacitor. Moreover, since the discharge resistor is placed outside the cover body, there is a cover body blocking between it and the inner cavity of the housing, which can prevent the heat inside the housing from being conducted to the discharge resistor, avoiding the increase in the resistance value of the discharge resistor affected by high temperature and ensuring the normal operation of the capacitor. In addition, when assembling the upper cover assembly, the conductive sheet is sleeved on the first connecting member for positioning and preliminary fixing, and then the cover body and the conductive sheet are connected through the second connecting member, which can ensure the installation firmness of the conductive sheet and will not affect the stability of the conductive sheet when connecting the lead on the first connecting member. Furthermore, the second connecting member is used to fix the conductive sheet on the one hand and to realize the electrical connection between the discharge resistor and the core in the housing on the other hand, making the structure of the capacitor upper cover assembly more compact, reducing the number of components used, and lowering the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0034] Figure 1 is an axonometric view of the capacitor provided by the specific embodiment of the present utility model;

[0035] Figure 2 is a cross-sectional view of the capacitor provided by the specific embodiment of the present utility model;

[0036] Figure 3 is an axonometric view of the capacitor upper cover assembly provided by the specific embodiment of the present utility model;

[0037] Figure 4 is a first partial cross-sectional view of the capacitor provided by the specific embodiment of the present utility model;

[0038] Figure 5 is a top view of the capacitor provided by the specific embodiment of the present utility model;

[0039] Figure 6 It is an exploded view of the capacitor upper cover assembly provided by the specific embodiment of the present utility model;

[0040] Figure 7 It is Figure 4 a partial enlarged view of the position A in

[0041] Figure 8 It is the second partial cross-sectional view of the capacitor provided by the specific embodiment of the present utility model;

[0042] Figure 9 It is Figure 8 a partial enlarged view of the position B in

[0043] Figure 10 It is a structural schematic diagram of the first connecting member provided by the specific embodiment of the present utility model.

[0044] In the figure:

[0045] 1. Cover body; 2. First connecting member; 3. Conductive sheet; 4. Discharge resistor; 5. Second connecting member; 6. Explosion-proof member; 7. Conductive washer; 8. Heat dissipation cover;

[0046] 11. End cover; 12. Insulating seat body;

[0047] 110. Through hole; 111. Limiting boss;

[0048] 121. Embedding hole; 122. Limiting groove; 123. Insulating partition part; 124. Positioning groove; 125. Bottom plate; 126. Reinforcing boss; 127. Supporting boss; 128. Card slot;

[0049] 1231. Partition plate;

[0050] 21. Embedding part; 22. Wiring part;

[0051] 211. Prismatic section; 212. First cylindrical section; 213. Second cylindrical section;

[0052] 31. Positioning part; 32. Fixing part; 33. Connecting part;

[0053] 51. Stopping part; 52. Through part;

[0054] 61. Accommodating hole; 62. Through hole;

[0055] 81. Heat dissipation hole; 82. Through hole; 83. Positioning plate; 84. Buckle; 85. Operating part;

[0056] 100. Housing; 200. Core; 300. Wiring harness assembly. Specific embodiment

[0057] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present utility model rather than all the structures are shown in the accompanying drawings.

[0058] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0060] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0061] The term "and / or" in this embodiment is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present utility model generally represents an "or" relationship between the associated objects before and after.

[0062] In the embodiments of the present utility model, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed descriptions of the same components are omitted.

[0063] Such as Figure 1 AndFigure 2 As shown, this embodiment provides a capacitor, which includes a housing 100, a core 200, and a capacitor upper cover assembly. The core 200 is disposed inside the housing 100. An opening is provided on the housing 100, and the capacitor upper cover assembly is fastened to the opening of the capacitor housing 100. The housing 100 is exemplarily an aluminum shell.

[0064] As Figure 3 , Figure 4 and Figure 5 shown, it is a schematic diagram of the capacitor upper cover assembly provided in this embodiment. The capacitor upper cover assembly includes a cover body 1, a first connecting member 2, a conductive sheet 3, a discharge resistor 4, and a second connecting member 5. The cover body 1 is configured to be installed at the opening of the housing 100 of the capacitor; the first connecting member 2 is disposed on the cover body 1 and is configured to connect an external lead; the conductive sheet 3 is located outside the cover body 1, and the conductive sheet 3 is sleeved on the first connecting member 2 and is in conductive contact with the first connecting member 2; the discharge resistor 4 is located outside the cover body 1 and is electrically connected to the conductive sheet 3; the second connecting member 5 penetrates and connects the conductive sheet 3 and the cover body 1, and the second connecting member 5 is configured to be electrically connected to the core 200 inside the housing 100.

[0065] The conductive sheet 3, the discharge resistor 4, and the second connecting member 5 are electrically connected, and the second connecting member 5 penetrates the cover body 1 to be electrically connected to the core 200 inside the housing 100, realizing the electrical connection between the discharge resistor 4 and the core 200. The first connecting member 2 is in conductive contact with the conductive sheet 3 for connecting the external lead to connect the capacitor to the corresponding circuit. By disposing the discharge resistor 4 outside the cover body 1, a large amount of heat generated by the discharge resistor 4 during operation is directly dissipated to the outside, and will not be transmitted to the inside of the housing 100, avoiding aggravating the temperature rise inside the capacitor housing 100, slowing down the aging speed of components such as the core 200 inside the housing 100, and extending the service life of the capacitor.

[0066] Moreover, since the discharge resistor 4 is placed outside the cover body 1, there is a cover body 1 blocking between it and the inner cavity of the housing 100, which can prevent the heat inside the housing 100 from being conducted to the discharge resistor 4, avoiding the increase in the resistance value of the discharge resistor 4 affected by high temperature and ensuring the normal operation of the capacitor. In addition, when assembling the upper cover assembly, the conductive sheet 3 is sleeved on the first connecting member 2 for positioning and preliminary fixing, and then the cover body 1 and the conductive sheet 3 are penetrated and connected by the second connecting member 5, which can ensure the installation firmness of the conductive sheet 3 and will not affect the stability of the conductive sheet 3 when connecting the lead on the first connecting member 2.

[0067] Furthermore, on the one hand, the second connecting member 5 is used to fix the conductive sheet 3, and on the other hand, it is used to realize the electrical connection between the discharge resistor 4 and the core 200 inside the housing 100, making the structure of the capacitor upper cover assembly more compact, reducing the number of components used, and lowering the cost.

[0068] Exemplarily, the materials of the conductive sheet 3, the first connecting member 2, and the second connecting member 5 are copper, aluminum, nickel, copper alloy, aluminum alloy, nickel alloy, etc., which have good electrical conductivity and can reduce heat loss.

[0069] In this embodiment, a three-phase capacitor is taken as an example. The conductive sheet 3, the discharge resistor 4, the first connecting member 2, and the second connecting member 5 are all provided in three and correspond one by one. The three conductive sheets 3 are arranged in a triangle, and both ends of the discharge resistor 4 are electrically connected to two adjacent conductive sheets 3 respectively, and the structural arrangement is reasonable and compact. The three discharge resistors 4 are all arranged outside the cover 1, and heat is dissipated to the outside during their operation, and the temperature environment inside the housing 100 is not affected, reducing the temperature rise speed of the entire capacitor. It can be understood that each conductive sheet 3 is sleeved on a corresponding first connecting member 2, and each conductive sheet 3 is fixed by a second connecting member 5.

[0070] Combined with Figure 2 and Figure 4 , three cores 200 are arranged in the housing 100, and the three cores 200 are electrically connected to the three discharge resistors 4. The specific connection method refers to the existing three-phase capacitor and will not be elaborated here. A wire harness assembly 300 is connected to the core 200. The wire harness assembly 300 includes a copper wire and a conductive bar connected to one end of the copper wire. One end of the second connecting member 5 passing through the cover 1 can extend into the housing 100 to be electrically connected to the conductive bar of the wire harness assembly 300, for example, by spot welding.

[0071] Referring to Figure 3 and Figure 5 , each conductive sheet 3 includes a positioning portion 31 and a fixing portion 32. The positioning portion 31 is sleeved on the first connecting member 2, and the second connecting member 5 passes through the fixing portion 32. The fixing portions 32 of the three conductive sheets 3 are arranged side by side, and an insulating partition portion 123 protrudes between two adjacent fixing portions 32 on the cover 1. Further, the three first connecting members 2 and the positioning portions 31 of the three conductive sheets 3 are evenly distributed in a circle relative to the center of the cover 1. The fixing portions 32 of the three conductive sheets 3 all extend towards the center of the cover 1 and are arranged side by side. An insulating partition portion 123 is provided between two adjacent fixing portions 32, which can avoid short circuit caused by contact between two adjacent conductive sheets 3 on the premise of realizing a compact structural arrangement and improve the use safety.

[0072] Referring to Figure 4 and Figure 6, the cover body 1 includes an end cover 11 and an insulating base body 12. The end cover 11 is buckled at the opening of the housing 100, and the buckling part is sealed. The insulating base body 12 is arranged outside the end cover 11, that is, on the side of the end cover 11 facing away from the inside of the housing 100. The first connecting piece 2 and the insulating partition 123 are both arranged on the insulating base body 12, and the conductive sheet 3 and the discharge resistor 4 are arranged on the side of the insulating base body 12 facing away from the end cover 11. The second connecting piece 5 penetrates through the insulating base body 12 and the end cover 11 and extends into the housing 100.

[0073] Combined with Figure 1 , the capacitor upper cover assembly further includes a heat dissipation cover 8 provided with heat dissipation holes 81. The heat dissipation cover 8 covers the outside of the insulating base body 12, which can protect components such as the internal discharge resistor 4 and the conductive sheet 3, and has good heat dissipation ability. To facilitate the connection of external leads, a through hole 82 for passing through the first connecting piece 2 is provided on the heat dissipation cover 8. See Figure 4 , Figure 5 and Figure 6 , two positioning plates 83 are arranged on the side of the heat dissipation cover 8 facing the insulating base body 12. The insulating partition 123 includes two partition plates 1231 arranged at intervals, and both of the two partition plates 1231 protrude on the insulating base body 12. A positioning groove 124 is arranged on the insulating base body 12 between the two partition plates 1231. When installing the heat dissipation cover 8, the two positioning plates 83 inside the heat dissipation cover 8 are inserted into the two positioning grooves 124 on the insulating base body 12 in a one-to-one correspondence. Since the heat dissipation cover 8 is made of insulating material, the existence of the positioning plates 83 can further prevent accidental short circuit between two adjacent conductive sheets 3 due to too close a distance.

[0074] See Figure 8 and Figure 9 , a buckle 84 is arranged on the heat dissipation cover 8, and a clamping groove 128 is arranged on the insulating base body 12. The buckle 84 is engaged with the clamping groove 128 to ensure that the heat dissipation cover 8 is firmly connected and does not fall off. Multiple buckles 84 and clamping grooves 128 can be arranged in a one-to-one correspondence to increase the connection firmness. Of course, a clamping groove 128 can also be arranged on the heat dissipation cover 8, and a buckle 84 can be arranged on the insulating base body 12.

[0075] As Figure 1 shown, an operation part 85 is further arranged on the outer wall of the heat dissipation cover 8, which is convenient for taking and placing the heat dissipation cover 8. Optionally, the operation part 85 includes three operation plates with an included angle of 120 degrees between each two, which is convenient for operators to operate and take and place.

[0076] See Figure 6, the insulating base 12 includes a bottom plate 125 and a reinforcing boss 126 protruding from the bottom plate 125. The conductive sheet 3 is located on the reinforcing boss 126, and the second connecting member 5 penetrates through the reinforcing boss 126 and the bottom plate 125. The setting of the reinforcing boss 126 can increase the strength of the insulating base 12 and reduce the possibility of deformation of the insulating base 12. Specifically, the reinforcing boss 126 is triangular, and the three corners thereof are provided with arc structures, which are adapted to the circular positioning portion 31 of the conductive sheet 3.

[0077] See Figure 5 , the conductive sheet 3 further includes a connecting portion 33 connected to the positioning portion 31. The connecting portion 33 extends out of the reinforcing boss 126 and is electrically connected to the discharge resistor 4. There is a gap between the connecting portion 33 and the bottom plate 125, which makes it easier to operate when electrically connecting the discharge resistor 4 and the connecting portion 33. For example, the discharge resistor 4 and the connecting portion 33 are connected by spot welding. Since the connecting portion 33 extends out of the reinforcing boss 126, the insulating base 12 will not be damaged during spot welding. A connecting portion 33 is provided on each of the opposite sides of the conductive sheet 3 for connecting the discharge resistors 4 on both sides.

[0078] As Figure 4 shown, the second connecting member 5 includes a connected stop portion 51 and a penetrating portion 52. The capacitor upper cover assembly further includes a locking nut. The penetrating portion 52 penetrates through the conductive sheet 3, the insulating base 12 and the end cover 11. The stop portion 51 stops on the side of the conductive sheet 3 facing away from the cover body 1 and is threadedly connected to the locking nut. The stop portion 51 and the locking nut stop on one side of the conductive sheet 3 and one side of the end cover 11 respectively, playing a role in locking the conductive sheet 3, the insulating base 12 and the end cover 11. Exemplarily, a single-piece gasket is penetrated by the lower ends of the three second connecting members 5, and the locking nut is located on the side of the gasket facing away from the end cover 11.

[0079] See Figure 4 , Figure 6 and Figure 7 , the capacitor upper cover assembly further includes an explosion-proof member 6. The explosion-proof member 6 is disposed between the end cover 11 and the core 200, playing an explosion-proof protection role. The explosion-proof member 6 is provided with a receiving hole 61 and a through hole 62. The cross-sectional area of the receiving hole 61 is larger than that of the through hole 62. The penetrating portion 52 of the second connecting member 5 passes through the receiving hole 61 and extends to the bottom end of the through hole 62 to be electrically connected to the conductive strip of the wire harness assembly 300. The locking nut is located in the receiving hole 61, so that the explosion-proof member 6 plays a role in avoiding the locking nut, making the structure of the capacitor more compact.

[0080] See Figure 8 , optionally, the first connecting member 2 includes a connected embedding portion 21 and a wiring portion 22. See Figure 6, an embedding hole 121 is provided on the insulating base 12. The embedding part 21 is embedded in the embedding hole 121, and the surface of the embedding part 21 protrudes relative to the insulating base 12. The cross-sectional area of the embedding part 21 is larger than that of the wiring part 22. The conductive sheet 3 is sleeved on the wiring part 22 and is in conductive contact with the embedding part 21. The wiring part 22 is a screw structure. After the wiring nose of the external lead is sleeved on the wiring part 22, the wiring nut is screwed on the wiring part 22. After tightening, the wiring nose and the conductive sheet 3 can be pressed tightly, and the conductive sheet 3 is pressed tightly on the embedding part 21 to achieve good conductive contact. Since the embedding part 21 protrudes relative to the surface of the insulating base 12, the positioning part 31 of the conductive sheet 3 will be placed on the embedding part 21 and will not contact the insulating base 12, avoiding affecting the conductive performance.

[0081] Further, a support boss 127 protrudes from the reinforcing boss 126 of the insulating base 12. The distance from the support boss 127 to the surface where the embedding part 21 protrudes relative to the reinforcing boss 126 is approximately the same. The fixing part 32 of the conductive sheet 3 is arranged on the support boss 127 so that the positioning part 31 and the fixing part 32 can be substantially in the same plane and will not be bent due to the tightening action of the second connecting member 5.

[0082] Further, referring to Figure 10 , the embedding part 21 of the first connecting member 2 includes a prism segment 211, a first cylindrical segment 212, and a second cylindrical segment 213 that are connected in sequence. The wiring part 22 is coaxially connected to the second cylindrical segment 213. The first cylindrical segment 212 is recessed inward relative to the second cylindrical segment 213 and the prism segment 211 so that the three enclose to form an annular groove. The first connecting member 2 is integrally injection-molded in the insulating base 12 by way of example, which is convenient and efficient in production. After injection molding, an embedding hole 121 for embedding the first connecting member 2 is formed on the insulating base 12, and an embedding protrusion is formed at the position of the annular groove to ensure a firm and reliable connection between the first connecting member 2 and the insulating base 12. Moreover, the setting of the prism segment 211 can also effectively increase the stability after injection molding.

[0083] Referring to Figure 3 and Figure 6 , the capacitor upper cover assembly further includes three conductive washers 7. The three conductive washers 7 are sleeved on the wiring parts 22 of the three first connecting members 2 in a one-to-one correspondence. After the wiring nut is tightened, the wiring nut can press the wiring nose of the external lead against the conductive washer 7. The conductive washer 7 is pressed against the conductive sheet 3 under the action of the wiring nut to ensure sufficient conductive contact among the wiring nose, the conductive washer 7, and the conductive sheet 3 and avoid poor contact. The conductive washer 7 is a hollow copper washer by way of example and has good conductive performance.

[0084] Referring to Figure 6 and Figure 7, three limiting bosses 111 are provided on the end cover 11, and each limiting boss 111 defines a through hole 110. The three through holes 110 correspond to the three second connectors 5 one by one. The second connector 5 penetrates through the insulating seat body 12 and the corresponding through hole 110, and is inserted into the explosion-proof block to be electrically connected to the wire harness assembly 300 on the core 200. Three limiting grooves 122 are provided on the insulating seat body 12, and the three limiting bosses 111 are correspondingly inserted into the three limiting grooves 122 respectively, so as to realize the positioning and preliminary connection between the insulating seat body 12 and the end cover 11, and rapid assembly can be achieved.

[0085] Optionally, the limiting boss 111 is integrally formed on the end cover by processes such as integral stamping, and at the same time, the through hole 110 is formed, which is convenient for processing and manufacturing.

[0086] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A capacitor cover assembly, characterized in that: include: A cover body (1) configured to be mounted at an opening of a capacitor housing (100); A first connecting member (2) is provided on the cover body (1), and the first connecting member (2) is configured to be connected to an external lead; A conductive sheet (3) located outside the cover body (1), the conductive sheet (3) being sleeved on the first connecting piece (2) and in conductive contact with the first connecting piece (2); A discharge resistor (4) is located outside the cover (1) and is electrically connected to the conductive sheet (3); A second connecting member (5) penetrates and connects the conductive sheet (3) and the cover body (1), and the second connecting member (5) is configured to be electrically connected to the core (200) in the housing (100).

2. The capacitor cover assembly according to claim 1, characterized in that: The second connecting member (5) comprises a stopper portion (51) and a penetration portion (52) which are connected to each other, the penetration portion (52) passing through the conductive sheet (3) and the cover body (1), and the stopper portion (51) stops at a side of the conductive sheet (3) facing away from the cover body (1).

3. The capacitor cover assembly according to claim 2, characterized in that: The capacitor upper cover assembly further comprises a locking nut and an explosion-proof component (6); the locking nut is screwed onto the penetration portion (52) and is located on a side of the cover body (1) facing away from the conductive sheet (3); the explosion-proof component (6) is arranged on a side of the cover body (1) facing away from the conductive sheet (3), the second connecting member (5) is penetrated through the explosion-proof component (6), and the explosion-proof component (6) is provided with a receiving hole (61) for receiving the locking nut.

4. The capacitor cover assembly according to claim 1, characterized in that: The first connecting member (2) comprises an embedded portion (21) and a wiring portion (22) connected to each other; The embedded portion (21) is embedded in the cover body (1), and the embedded portion (21) is protruding relative to the surface of the cover body (1), the cross-sectional area of ​​the embedded portion (21) is larger than the cross-sectional area of ​​the wiring portion (22), and the conductive sheet (3) is sleeved on the wiring portion (22) and is in conductive contact with the embedded portion (21).

5. The capacitor cover assembly according to claim 1, characterized in that: The capacitor upper cover assembly further comprises a conductive gasket (7), wherein the conductive gasket (7) is sleeved on the first connecting member (2); The first connecting member (2) is configured to be used for passing a wiring nut and a wiring nose of the external lead, and the conductive washer (7) is configured to be pressed against the conductive sheet (3) under the action of the wiring nut.

6. The capacitor cover assembly according to claim 1, characterized in that: The cover body (1) comprises an end cover (11) and an insulating seat body (12); The end cover (11) is buckled with the opening of the shell (100); a limiting boss (111) is provided on the end cover (11); the limiting boss (111) surrounds a through hole (110); the insulating seat (12) is provided outside the end cover (11); the first connecting member (2) is provided on the insulating seat (12); the second connecting member (5) passes through the insulating seat (12) and the through hole (110); and a limiting groove (122) is provided on the insulating seat (12); The limiting boss (111) is inserted into the limiting groove (122).

7. The capacitor cover assembly according to any one of claims 1 to 5, characterized in that: The conductive sheet (3), the discharge resistor (4), the first connecting member (2) and the second connecting member (5) are each provided in three numbers and correspond to each other one by one; The three conductive sheets (3) are arranged in a triangle, and the two ends of the discharge resistor (4) are respectively electrically connected to two adjacent conductive sheets (3).

8. The capacitor cover assembly according to claim 7, characterized in that: Each of the conductive sheets (3) comprises a positioning portion (31) and a fixing portion (32) which are connected to each other; the positioning portion (31) is sleeved on the first connecting member (2), and the second connecting member (5) passes through the fixing portion (32); the fixing portions (32) of the three conductive sheets (3) are arranged side by side, and an insulating partition portion (123) is protrudingly provided on the cover body (1) between two adjacent fixing portions (32).

9. The capacitor cover assembly according to claim 8, characterized in that: The cover body (1) comprises an end cover (11) and an insulating seat body (12); the end cover (11) is buckled on the opening of the shell (100), the insulating seat body (12) is arranged outside the end cover (11), and the first connecting member (2) and the insulating partition (123) are both arranged on the insulating seat body (12); The capacitor upper cover assembly further comprises a heat dissipation cover (8) provided with heat dissipation holes (81); the heat dissipation cover (8) is arranged outside the insulating seat (12), and the heat dissipation cover (8) is provided with a through hole (82) for passing the first connecting member (2); A positioning plate (83) is provided on the side of the heat dissipation cover (8) facing the insulating seat (12); the insulating partition (123) comprises two partition plates (1231) arranged at intervals; a positioning groove (124) is provided on the insulating seat (12) between the two partition plates (1231); the positioning groove (124) is plugged into the positioning plate (83); and / or a buckle (84) is provided on one of the heat dissipation cover (8) and the insulating seat (12), and a slot (128) is provided on the other; the buckle (84) is engaged with the slot (128).

10. The capacitor cover assembly according to claim 9, characterized in that: The insulating seat body (12) comprises a bottom plate (125) and a reinforcing boss (126) protruding from the bottom plate (125), the conductive sheet (3) is located on the reinforcing boss (126), and the second connecting member (5) passes through the reinforcing boss (126) and the bottom plate (125); The conductive sheet (3) further comprises a connecting portion (33) connected to the positioning portion (31), the connecting portion (33) cantilevering out of the reinforcing boss (126) and being electrically connected to the discharge resistor (4).

11. A capacitor, characterized in that The invention comprises a shell (100), a core (200), and a capacitor cover assembly according to any one of claims 1 to 10, wherein the core (200) is arranged in the shell (100), an opening is provided on the shell (100), and the capacitor cover assembly is buckled at the opening.

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