Capacitor capable of accelerating impregnation
By using negative pressure liquid suction hole technology in the capacitor, the problem of long time entering the core and insufficient impregnation is solved, faster and more sufficient impregnation of the electrolyte is achieved, and the production efficiency of the capacitor is improved.
Patent Information
- Application Number
- CN202420548061.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-03-20
AI Technical Summary
In the existing capacitor production process, it is difficult for the electrolyte to enter the core, resulting in a long impregnation time, especially for capacitors with larger diameters, the core is prone to insufficient impregnation.
A capacitor is designed in which the negative pressure liquid suction hole on the conductive block is used to suck the electrolyte in the negative pressure, and by forming a negative pressure in the core and the inner cavity of the shell, the electrolyte enters the inside of the core, thereby speeding up the impregnation process.
Through the technology of negative pressure liquid suction holes, the time for the electrolyte to enter the core is significantly shortened, the impregnation of the electrolyte inside the core is improved, and the problem of insufficient impregnation is solved.
Smart Images
Figure CN222720243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor capable of accelerating impregnation. Background Art
[0002] Some capacitors have a wound core and electrolyte inside. The core is immersed in the electrolyte. The degree of electrolyte impregnation in the core affects the performance and production time of the capacitor.
[0003] The existing capacitor production process is to first place the core into the shell, then inject the electrolyte into the shell, and finally seal the opening of the shell. In this way, the electrolyte basically enters the core through liquid penetration, and the impregnation time is relatively long to fully impregnate the inside of the core. Especially for capacitors with larger diameters, it is more difficult for the electrolyte to enter the core, and the core is more likely to be insufficiently impregnated, requiring a longer impregnation time. Utility Model Content
[0004] The main purpose of the utility model is to provide a capacitor capable of accelerating impregnation, aiming to solve the technical problems in the prior art that the impregnation time of the core and the electrolyte is long and the impregnation is not sufficient.
[0005] To achieve the above-mentioned purpose, the utility model provides a capacitor capable of accelerating impregnation, comprising:
[0006] An outer shell, wherein an inner cavity is provided on the inner side of the outer shell, an opening communicating with the inner cavity is provided on the upper side of the outer shell, and an end plate is provided on the lower side of the outer shell;
[0007] A core, which is disposed in the inner cavity, and the lower end surface of the core is electrically connected to the end plate;
[0008] A cover plate is arranged in the opening, the cover plate is arranged on the upper side of the core, the cover plate includes an insulating plate and a conductive block, the conductive block is arranged in the middle of the insulating plate, the outer periphery of the insulating plate is fixedly connected to the outer shell, the conductive block passes through the upper and lower sides of the insulating plate, the lower side of the conductive block is electrically connected to the upper end surface of the core, a negative pressure liquid suction hole is provided on the conductive block, and a sealing plug is provided in the negative pressure liquid suction hole.
[0009] In the utility model, the negative pressure liquid suction hole on the conductive block is used for negative pressure suction of electrolyte. When producing the capacitor, the core is first placed in the inner cavity of the shell, and the cover plate is fixed in the opening of the shell. Since the conductive block of the cover plate is provided with the negative pressure liquid suction hole, the inner cavity can be evacuated to form a negative pressure, and the inner core also forms a negative pressure. Then the electrolyte is sucked in through the negative pressure liquid suction hole, and the electrolyte enters the inner cavity under the action of the negative pressure in the inner cavity. At the same time, the negative pressure inside the core will also attract the electrolyte to enter the inner core, thereby accelerating the electrolyte to enter the inner core, shortening the impregnation time, and the inner core is more fully impregnated with the electrolyte.
[0010] Preferably, the sealing plug comprises a rubber plug and a welding plug, the rubber plug is connected to the negative pressure suction hole by interference fit, the welding plug is arranged on the upper side of the rubber plug, and the welding plug is welded and sealed to the negative pressure suction hole.
[0011] After the absorption is completed, first insert the rubber plug into the negative pressure absorption hole to prevent the electrolyte from leaking out when moving the capacitor and the electrolyte that may be on the outside of the cleanable capacitor. Then insert the welding plug into the negative pressure absorption hole and move the capacitor to the welding equipment. Weld and seal the welding plug and the negative pressure absorption hole to prevent the electrolyte from leaking out.
[0012] Preferably, a first groove is provided at the upper end of the negative pressure liquid suction hole, and the welding plug is arranged in the first groove.
[0013] The first groove facilitates the positioning of the welding plug when it is placed in the negative pressure liquid suction hole.
[0014] Preferably, the capacitor further comprises a first power connector and a second power connector, wherein the first power connector is arranged on the upper side of the shell and is electrically connected to the shell, the second power connector is arranged on the upper side of the conductive block and is electrically connected to the conductive block, the first power connector is provided with a first power connection portion, and the second power connector is provided with a second power connection portion.
[0015] The first electrical connection portion of the first electrical connection member and the second electrical connection portion of the second electrical connection member are respectively two terminals for electrically connecting the capacitor to the outside.
[0016] Preferably, the second power connection member includes a second power connection ring, the second power connection portion is arranged on the upper side of the second power connection ring, the second power connection ring is welded to the conductive block, and the negative pressure liquid suction hole is located on the inner side of the inner hole of the second power connection ring.
[0017] The second electrical connection ring does not cover the negative pressure suction hole and does not affect the connection of the sealing plug.
[0018] Preferably, a second annular groove is provided on the outer periphery of the upper side of the conductive block, and the second power connection ring is provided in the second groove.
[0019] The second groove facilitates the installation and positioning of the second electrical connection ring.
[0020] Preferably, the capacitor also includes a first connecting plate, which is arranged between the core and the conductive block, the lower side of the first connecting plate is electrically connected to the upper end surface of the core, the upper side of the first connecting plate is electrically connected to the conductive block, and the first connecting plate is provided with a first through hole, which is opposite to the negative pressure liquid absorption hole.
[0021] The first connecting piece is used to connect the conductive block and the core. The first through hole provided on the first connecting piece does not block the negative pressure liquid absorption hole, does not affect the entry of electrolyte, and also increases the connection area between the first connecting piece and the conductive block.
[0022] Preferably, the capacitor also includes a second connecting plate, which is arranged between the core and the end plate, the upper side of the second connecting plate is electrically connected to the lower end surface of the core, the lower side of the second connecting plate is electrically connected to the end plate, a first boss is provided on the upper side of the second connecting plate, a core hole is provided in the middle of the core, the first boss is inserted in the core hole, a second through hole is provided in the middle of the end plate, a second boss is provided on the lower side of the second connecting plate, the second boss is inserted in the second through hole, and the second boss and the second through hole are welded and sealed.
[0023] The first boss is inserted into the core hole of the core to position the second connecting piece and the core relative to each other. The second boss is inserted into the second through hole of the end plate to position the second connecting piece and the end plate relative to each other. The first boss and the second boss can position the core, the second connecting piece and the outer shell during assembly, so that the first through hole is further opposite to the negative pressure suction hole.
[0024] Preferably, the capacitor also includes a sealing rubber ring, which is arranged on the upper side of the outer periphery of the insulating plate, a convex ring is provided on the upper side of the insulating plate, and the sealing rubber ring is arranged on the upper side of the convex ring. The upper end of the outer shell is provided with an inner curling edge, and the inner curling edge is pressed against the upper side of the sealing rubber ring.
[0025] The sealing rubber ring is used to seal between the outer periphery of the cover plate and the outer shell. An inner curling edge is formed on the outer shell to press the sealing rubber ring onto the cover plate. At the same time, the lower side of the sealing rubber ring is squeezed and deformed by the convex ring on the cover plate, which can improve the sealing performance and further improve the vacuum degree of the inner cavity during vacuum extraction. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0027] Figure 1 It is a three-dimensional structural schematic diagram of the capacitor of the utility model;
[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the capacitor of the utility model;
[0029] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.
[0030] In the accompanying drawings: 1-shell, 13-end plate, 14-inner curling edge, 15-waist, 2-core, 21-core hole, 22-first connecting piece, 221-first through hole, 23-second connecting piece, 231-first convex column, 232-second convex column, 3-cover plate, 31-insulating plate, 311-convex ring, 32-conductive block, 321-second groove, 33-negative pressure suction hole, 331-first groove, 4-sealing plug, 41-rubber plug, 42-welding plug, 5-first power connection piece, 51-first power connection part, 6-second power connection piece, 61-second power connection part, 62-second power connection ring, 7-sealing rubber ring.
[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0033] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of technical personnel in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0035] like Figures 1 to 3 As shown, a capacitor capable of accelerating impregnation includes a housing 1, a core 2 and a cover plate 3.
[0036] The shell 1 is made of metal, an inner cavity is provided on the inner side of the shell 1 , an opening communicating with the inner cavity is provided on the upper side of the shell 1 , and an end plate 13 is provided on the lower side of the shell 1 .
[0037] The core 2 is disposed in the inner cavity, and the upper and lower end surfaces of the core 2 are respectively the positive terminal surface and the negative terminal surface, and the lower end surface of the core 2 is electrically connected to the end plate 13 .
[0038] The cover plate 3 is arranged in the opening, and the cover plate 3 is arranged on the upper side of the core 2. The cover plate 3 includes an insulating plate 31 and a conductive block 32. The conductive block 32 is arranged in the middle of the insulating plate 31. The outer periphery of the insulating plate 31 is fixedly connected to the shell 1. The conductive block 32 penetrates the upper and lower sides of the insulating plate 31. The lower side of the conductive block 32 is electrically connected to the upper end surface of the core 2. The conductive block 32 is provided with a negative pressure liquid suction hole 33, and a sealing plug 4 is provided in the negative pressure liquid suction hole 33. The inner cavity is also provided with an electrolyte to soak the core 2. The conductive block 32 and the shell 1 form two electrodes of the capacitor, and the two electrodes can be connected to the outside at the upper side of the capacitor.
[0039] In the present scheme, the negative pressure liquid suction hole 33 on the conductive block 32 is used for negative pressure suction of electrolyte. When producing the capacitor, the core 2 is first placed in the inner cavity of the outer shell 1, and the cover plate 3 is fixed in the opening of the outer shell 1 to close the opening of the outer shell 1, leaving only the negative pressure liquid suction hole 33 on the cover plate 3 connected to the outside; since the negative pressure liquid suction hole 33 is provided on the conductive block 32 of the cover plate 3, the inner cavity can be evacuated to form a negative pressure, and the gas is also discharged from the core 2 to form a negative pressure; and then the electrolyte is sucked in through the negative pressure liquid suction hole 33, and the electrolyte enters the inner cavity under the action of the negative pressure in the inner cavity. At the same time, the negative pressure inside the core 2 will also attract the electrolyte into the core 2, thereby accelerating the entry of the electrolyte into the core 2, shortening the impregnation time, and the core 2 is more fully impregnated with the electrolyte.
[0040] The cover plate 3 of the utility model is provided with a negative pressure liquid suction hole 33, which can form a vacuum after closing the opening of the shell 1 and then suck in the electrolyte. Compared with the existing capacitor that uses the cover plate 3 to close the opening of the shell 1 after filling the liquid, this solution can speed up the electrolyte from entering the core 2, shorten the production time, and make the impregnation more complete. The negative pressure liquid suction hole 33 is set on the conductive block 32 in the middle of the cover plate 3, and the electrolyte can enter the inner cavity from the middle, improving the uniformity of the flow distribution of the electrolyte in the inner cavity.
[0041] In some specific embodiments, the sealing plug 4 includes a rubber plug 41 and a welding plug 42. The rubber plug 41 is connected to the negative pressure suction hole 33 by interference fit. The welding plug 42 is arranged on the upper side of the rubber plug 41. The welding plug 42 is welded and sealed to the negative pressure suction hole 33.
[0042] After the liquid is absorbed, the rubber plug 41 is first inserted into the negative pressure liquid absorption hole 33 to prevent the electrolyte from leaking out when the capacitor is moved and to prevent the electrolyte from being stained on the outside of the capacitor. Then the welding plug 42 is inserted into the negative pressure liquid absorption hole 33 and the capacitor is moved to the welding device. The welding plug 42 and the negative pressure liquid absorption hole 33 are welded and sealed to prevent the electrolyte from leaking out. The material of the welding plug 42 is the same as that of the conductive block 32. If the material of the conductive block 32 is aluminum, the welding plug 42 is an aluminum column.
[0043] Furthermore, a first groove 331 is provided at the upper end of the negative pressure liquid suction hole 33 , and the welding plug 42 is disposed in the first groove 331 .
[0044] The welding plug 42 is placed and positioned in the first groove 331 , and the first groove 331 facilitates the positioning of the welding plug 42 when it is placed in the negative pressure suction hole 33 .
[0045] In some specific embodiments, the capacitor further includes a first power connector 5 and a second power connector 6, wherein the first power connector 5 is disposed on the upper side of the housing 1 and is electrically connected to the housing 1, and the second power connector 6 is disposed on the upper side of the conductive block 32 and is electrically connected to the conductive block 32, and a first power connection portion 51 is disposed on the first power connector 5 and a second power connection portion 61 is disposed on the second power connector 6.
[0046] The first electrical connection part 51 of the first electrical connection member 5 and the second electrical connection part 61 of the second electrical connection member 6 are two electrodes for electrically connecting the capacitor to the outside. Specifically, the first electrical connection part 51 can be one or more plugs or plugs, and the second electrical connection part 61 can also be one or more plugs or plugs, which is convenient for direct plugging into the circuit board.
[0047] Furthermore, the second power connection member 6 includes a second power connection ring 62 , the second power connection portion 61 is arranged on the upper side of the second power connection ring 62 , the second power connection ring 62 is welded to the conductive block 32 , and the negative pressure suction hole 33 is located on the inner side of the inner hole of the second power connection ring 62 .
[0048] The second power connection ring 62 does not cover the negative pressure suction hole 33, does not affect the connection of the sealing plug 4, and the sealing plug 4 does not affect the setting of the second power connection piece 6. After the capacitor is positioned on the welding equipment, the second power connection piece 6 and the welding plug 42 can be welded together to improve production efficiency.
[0049] Furthermore, a second annular groove 321 is provided on the outer periphery of the upper side of the conductive block 32, and the second power connection ring 62 is disposed in the second groove 321. The second groove 321 facilitates the installation and positioning of the second power connection ring 62.
[0050] In some specific embodiments, the capacitor further includes a first connecting piece 22, which is disposed between the core 2 and the conductive block 32, the lower side of the first connecting piece 22 is electrically connected to the upper end surface of the core 2, the upper side of the first connecting piece 22 is electrically connected to the conductive block 32, and the first connecting piece 22 is provided with a first through hole 221, which is directly opposite to the negative pressure liquid suction hole 33. The first connecting piece 22 is connected to the upper end surface of the core 2 and the conductive block 32 by welding, and the first connecting piece 22 can be folded to facilitate welding.
[0051] The first connecting piece 22 is used to connect the conductive block 32 and the core 2. The first through hole 221 provided on the first connecting piece 22 does not block the negative pressure liquid suction hole 33 and does not affect the entry of electrolyte. The portion of the first connecting piece 22 outside the first through hole 221 also increases the connection area between the first connecting piece 22 and the conductive block 32.
[0052] In some specific embodiments, the capacitor also includes a second connecting piece 23, which is arranged between the core 2 and the end plate 13, the upper side of the second connecting piece 23 is electrically connected to the lower end surface of the core 2, and the lower side of the second connecting piece 23 is electrically connected to the end plate 13. A first boss 231 is provided on the upper side of the second connecting piece 23, a core hole 21 is provided in the middle of the core 2, and the first boss 231 is inserted into the core hole 21. A second through hole is provided in the middle of the end plate 13, and a second boss 232 is provided on the lower side of the second connecting piece 23. The second boss 232 is inserted into the second through hole, and the second boss 232 is welded and sealed with the second through hole.
[0053] The first convex column 231 is inserted into the core hole 21 of the core 2 to position the second connecting piece 23 and the core 2 relative to each other, and the second convex column 232 is inserted into the second through hole of the end plate 13 to position the second connecting piece 23 and the end plate 13 relative to each other. The first convex column 231 and the second convex column 232 can position the core 2, the second connecting piece 23 and the housing 1 during assembly, so that the first through hole 221 is further aligned with the negative pressure suction hole 33. The second connecting piece 23 is connected to the lower end surface of the core 2 and the end plate 13 by welding.
[0054] In some specific embodiments, the capacitor also includes a sealing rubber ring 7, which is arranged on the upper side of the outer periphery of the insulating plate 31, a convex ring 311 is provided on the upper side of the insulating plate 31, and the sealing rubber ring 7 is arranged on the upper side of the convex ring 311. An inner curling edge 14 is provided at the upper end of the outer shell 1, and the inner curling edge 14 is pressed against the upper side of the sealing rubber ring 7. A waist 15 is provided on the outer shell 1, and the outer periphery of the cover plate 3 is abutted against the waist 15.
[0055] The sealing rubber ring 7 is used for sealing between the outer periphery of the cover plate 3 and the outer shell 1. An inner curling edge 14 is formed on the outer shell 1 to press the sealing rubber ring 7 onto the cover plate 3. At the same time, the lower side of the sealing rubber ring 7 is squeezed and deformed by the convex ring 311 on the cover plate 3, which can improve the sealing performance and further improve the vacuum degree of the inner cavity during vacuum extraction.
[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A capacitor capable of accelerating impregnation, characterized in that: include: A shell (1), wherein an inner cavity is provided on the inner side of the shell (1), an opening communicating with the inner cavity is provided on the upper side of the shell (1), and an end plate (13) is provided on the lower side of the shell (1); A core (2) is disposed in the inner cavity, and a lower end surface of the core (2) is electrically connected to the end plate (13); A cover plate (3) is arranged in the opening. The cover plate (3) is arranged on the upper side of the core (2). The cover plate (3) comprises an insulating plate (31) and a conductive block (32). The conductive block (32) is arranged in the middle of the insulating plate (31). The outer periphery of the insulating plate (31) is fixedly connected to the outer shell (1). The conductive block (32) passes through the upper side and the lower side of the insulating plate (31). The lower side of the conductive block (32) is electrically connected to the upper end surface of the core (2). A negative pressure liquid suction hole (33) is provided on the conductive block (32). A sealing plug (4) is provided in the negative pressure liquid suction hole (33).
2. The capacitor according to claim 1, wherein: The sealing plug (4) comprises a rubber plug (41) and a welding plug (42); the rubber plug (41) is connected to the negative pressure liquid suction hole (33) by interference fit; the welding plug (42) is arranged on the upper side of the rubber plug (41); the welding plug (42) is welded and sealed to the negative pressure liquid suction hole (33).
3. The capacitor according to claim 2, characterized in that A first groove (331) is provided at the upper end of the negative pressure liquid suction hole (33), and the welding plug (42) is arranged in the first groove (331).
4. The capacitor according to claim 1, wherein The capacitor further comprises a first electrical connection member (5) and a second electrical connection member (6); the first electrical connection member (5) is arranged on the upper side of the housing (1), and the first electrical connection member (5) is electrically connected to the housing (1); the second electrical connection member (6) is arranged on the upper side of the conductive block (32), and the second electrical connection member (6) is electrically connected to the conductive block (32); the first electrical connection member (5) is provided with a first electrical connection portion (51), and the second electrical connection member (6) is provided with a second electrical connection portion (61).
5. The capacitor according to claim 4, characterized in that The second power connection member (6) comprises a second power connection ring (62), the second power connection portion (61) is arranged on the upper side of the second power connection ring (62), the second power connection ring (62) is welded to the conductive block (32), and the negative pressure liquid suction hole (33) is located on the inner side of the inner hole of the second power connection ring (62).
6. The capacitor according to claim 5, characterized in that A second groove (321) is provided in an annular shape on the outer periphery of the upper side of the conductive block (32), and the second power connection ring (62) is arranged in the second groove (321).
7. The capacitor according to claim 1, wherein: The capacitor further comprises a first connecting sheet (22), the first connecting sheet (22) being arranged between the core (2) and the conductive block (32), the lower side of the first connecting sheet (22) being electrically connected to the upper end surface of the core (2), the upper side of the first connecting sheet (22) being electrically connected to the conductive block (32), and the first connecting sheet (22) being provided with a first through hole (221), the first through hole (221) being directly opposite to the negative pressure liquid suction hole (33).
8. The capacitor according to claim 7, wherein: The capacitor further comprises a second connecting piece (23), the second connecting piece (23) being arranged between the core (2) and the end plate (13), the upper side of the second connecting piece (23) being electrically connected to the lower end surface of the core (2), the lower side of the second connecting piece (23) being electrically connected to the end plate (13), the upper side of the second connecting piece (23) being provided with a first convex column (231), the middle part of the core (2) being provided with a core hole (21), the first convex column (231) being inserted into the core hole (21), the middle part of the end plate (13) being provided with a second through hole, the lower side of the second connecting piece (23) being provided with a second convex column (232), the second convex column (232) being inserted into the second through hole, and the second convex column (232) and the second through hole being welded and sealed.
9. The capacitor according to claim 1, wherein: The capacitor further comprises a sealing rubber ring (7), the sealing rubber ring (7) being arranged on the upper side of the outer periphery of the insulating plate (31), the upper side of the insulating plate (31) being provided with a convex ring (311), the sealing rubber ring (7) being arranged on the upper side of the convex ring (311), the upper end of the housing (1) being provided with an inner curling edge (14), the inner curling edge (14) being pressed against the upper side of the sealing rubber ring (7).