Novel explosion-proof capacitor

Abstract

The utility model discloses a novel explosion-proof capacitor, which comprises an explosion-proof block, an upper cover assembly, a first metal sheet, a second metal sheet and a conducting rod, and is characterized in that the explosion-proof block is arranged in a shell of the capacitor; the upper cover assembly covers the opening of the shell of the capacitor and is positioned above the explosion-proof block; the first metal sheet is arranged on the upper cover assembly, and the second metal sheet is arranged on the explosion-proof block; the conducting rod is a solid rivet, and a limiting boss is annularly arranged on the outer side wall of the conducting rod; the upper end of the conducting rod penetrates through the upper cover assembly from bottom to top, the upper end portion of the conducting rod is riveted and fixed to the first metal sheet, and the limiting boss abuts against the bottom of the upper cover assembly. The lower end of the conducting rod penetrates through the explosion-proof block from top to bottom, and the lower end portion of the conducting rod is welded and fixed to the second metal sheet to form an explosion-proof welding spot. Therefore, the conducting rod is arranged to be the solid rivet, and the limiting boss is annularly arranged on the outer side wall of the solid rivet, so that when the upper end of the conducting rod penetrates through the upper cover assembly from bottom to top and the upper end part of the conducting rod is riveted and fixed on the first metal sheet, the limiting boss can abut against the bottom of the upper cover assembly to connect the upper cover assembly into a whole; therefore, no extra hollow rivet needs to be arranged for riveting, use of rivet materials is reduced, assembly is easy and convenient, and the requirement for assembly precision is low.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, specifically to a novel explosion-proof capacitor. Background Technology

[0002] This section provides only background information related to this application to enable those skilled in the art to understand this application more thoroughly and accurately, and it is not necessarily prior art.

[0003] When existing capacitors malfunction due to manufacturing processes, working environment, poor ventilation, or other factors, excessive gas may be generated inside. When the internal gas pressure becomes too high, the capacitor will bulge and explode. Current explosion-proof designs typically involve placing an explosion-proof block on the capacitor, located between the capacitor core and the cover plate. The capacitor's leads are fixed to the cover plate mounting base by a conductive rivet, the other end of which passes through the explosion-proof block and is welded to a metal plate mounted on it. Therefore, when the capacitor core experiences permanent breakdown, the generated gas and temperature cause the internal gas pressure to rise. This pressure acts on the easily deformable cover plate, causing it to bulge upwards, eventually breaking the explosion-proof weld between the rivet and the metal plate, creating an open circuit inside the capacitor and achieving the explosion-proof effect.

[0004] The cover plate typically includes a cover plate body, a mounting base on top of the cover plate body, and a base at the bottom of the cover plate body. These three components are riveted together using hollow rivets, with the conductive rivet passing through the hollow rivet. This design, requiring additional hollow rivets for fixing the three components, not only increases the amount of rivet material used, thus increasing costs, but also makes assembly more complex. Furthermore, the need for the conductive rivet to pass through the hollow rivet places certain requirements on assembly precision. Utility Model Content

[0005] To overcome the defects described in the prior art, this utility model provides a novel explosion-proof capacitor. By setting the conductive rod as a solid rivet with a limiting boss on the outer side wall of the solid rivet, when the upper end of the conductive rod passes through the upper cover assembly from bottom to top and its upper end is riveted and fixed to the first metal sheet, its limiting boss can abut against the bottom of the upper cover assembly, thereby connecting the upper cover assembly into one piece. Therefore, there is no need to set hollow rivets for riveting, which reduces the use of rivet materials, and the assembly is simple and convenient with low assembly accuracy requirements.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A new type of explosion-proof capacitor includes:

[0008] Explosion-proof blocks are used to install inside the casing of capacitors;

[0009] A top cover assembly, which is used to cover the opening of the capacitor's housing and is located above the explosion-proof block;

[0010] A first metal sheet and a second metal sheet, wherein the first metal sheet is disposed on the upper cover assembly and the second metal sheet is disposed on the explosion-proof block;

[0011] The conductive rod is a solid rivet with a limiting boss on its outer side wall; the upper end of the conductive rod passes through the upper cover assembly from bottom to top and its upper end is riveted and fixed to the first metal sheet, and the limiting boss abuts against the bottom of the upper cover assembly; the lower end of the conductive rod passes through the explosion-proof block from top to bottom and its lower end is welded and fixed to the second metal sheet to form an explosion-proof weld point.

[0012] Furthermore, the upper end of the conductive rod is hollow and fixed to the first metal sheet by a flange riveting process.

[0013] Furthermore, the upper cover assembly includes a cover plate, a mounting base located at the end of the cover plate facing away from the explosion-proof block, and a base located at the end of the cover plate facing the explosion-proof block. The first metal sheet is mounted on the mounting base, and the bottom of the base abuts against the limiting boss.

[0014] Furthermore, the mounting base includes a mounting body and a top cover covering the mounting body, and the top of the mounting body has a mounting groove for mounting the first metal sheet.

[0015] Furthermore, a groove is provided at the bottom of the explosion-proof block, and an elastic component is provided in the groove, with the second metal sheet disposed on the elastic component.

[0016] Furthermore, the elastic component includes elastic elements arranged vertically and a positioning block, wherein:

[0017] One end of the elastic element abuts against the top wall of the groove, and the other end of the elastic element abuts against the top of the positioning block;

[0018] The second metal sheet is installed at the bottom of the positioning block. The lower end of the conductive rod passes through the explosion-proof block, the elastic element and the positioning block in sequence and is welded to the second metal sheet to form the explosion-proof weld point. The positioning block compresses the elastic element to store elastic potential energy.

[0019] Furthermore, the second metal sheet has a welding hole in the middle for welding and fixing to the lower end of the conductive rod, and both ends of the second metal sheet are limited and fixed to the bottom of the positioning block.

[0020] Furthermore, the second metal sheet has limit holes at both ends, and the bottom of the positioning block has a limit post that engages with the limit hole. The second metal sheet engages with the limit post through the limit hole to achieve positioning and fixation.

[0021] Furthermore, it also includes an insulating block fixed to the bottom of the explosion-proof block and located below the second metal sheet, the insulating block being used to separate the explosion-proof solder joint from the capacitor core.

[0022] Furthermore, the insulating block and the explosion-proof block are fixed together by riveting, screwing, or hot-melt methods.

[0023] In summary, the novel explosion-proof capacitor provided by this utility model has the following beneficial effects:

[0024] (1) By setting the conductive rod as a solid rivet and providing a limiting boss on the outer side wall of the solid rivet, when the upper end of the conductive rod passes through the upper cover assembly from bottom to top and its upper end is riveted and fixed on the first metal sheet, its limiting boss can abut against the bottom of the upper cover assembly, thereby connecting the upper cover assembly into one piece. Therefore, there is no need to set hollow rivets for riveting, which reduces the use of rivet materials, and the assembly is simple and convenient with low assembly accuracy requirements.

[0025] (2) The upper end of the solid rivet is hollow, so the upper end of the solid rivet can be riveted and fixed to the first metal sheet by the flange riveting process, thereby replacing the original welding scheme, reducing the problem of stress concentration, and thus reducing the risk of metal fatigue and cracking. Attached Figure Description

[0026] Figure 1 This is an explosion diagram of the explosion-proof capacitor of this utility model;

[0027] Figure 2 for Figure 1 An illustration of the explosion from another perspective;

[0028] Figure 3 This is a schematic diagram of the structure of the explosion-proof capacitor of this utility model;

[0029] Figure 4 for Figure 3 A structural diagram from another perspective;

[0030] Figure 5 for Figure 4 A schematic diagram of the structure after the insulating block is hidden;

[0031] Figure 6 This is a cross-sectional schematic diagram of the explosion-proof capacitor of this utility model.

[0032] The meanings of the reference numerals in the attached figures are as follows:

[0033] 1. Explosion-proof block; 101. First side plate; 102. Second side plate; 2. Top cover assembly; 201. Cover plate; 202. Mounting base; 203. Top cover; 204. Base; 3. First metal sheet; 4. Second metal sheet; 401. Welding hole; 402. Limiting hole; 5. Conductive rod; 501. Limiting boss; 6. Elastic element; 7. Positioning block; 701. Limiting post; 8. Insulating block; 9. Rivet. Detailed Implementation

[0034] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] See Figure 1-6 This utility model provides a novel explosion-proof capacitor, including a housing (not shown in the figure), a capacitor core disposed within the housing, an explosion-proof block 1 disposed inside the housing and above the capacitor core, and a top cover assembly 2 with a sealing cover disposed at the top opening of the housing and above the explosion-proof block 1. Additionally, it includes a first metal sheet 3, a second metal sheet 4, and a conductive rod 5. The first metal sheet 3 is disposed on the top cover assembly 2, and the second metal sheet 4 is disposed on the explosion-proof block 1. The conductive rod 5 is a solid rivet with a limiting boss 501 circumferentially arranged on its outer side wall. The upper end of the conductive rod 5 passes through the top cover assembly 2 from bottom to top and is riveted to the first metal sheet 3. The limiting boss 501 abuts against the bottom of the top cover assembly 2. The lower end of the conductive rod 5 passes through the explosion-proof block 1 from top to bottom and is welded to the second metal sheet 4 to form an explosion-proof weld point.

[0038] Therefore, by setting the conductive rod 5 as a solid rivet and providing a limiting boss 501 around the outer wall of the solid rivet, when the upper end of the conductive rod 5 passes through the upper cover assembly 2 from bottom to top and its upper end is riveted and fixed to the first metal sheet 3, its limiting boss 501 can abut against the bottom of the upper cover assembly 2, thereby connecting the upper cover assembly into one piece. Therefore, it is not necessary to set hollow rivets for riveting as in traditional capacitors, thereby reducing the use of rivet materials, and the assembly is simple and convenient with low assembly precision requirements.

[0039] In addition, the upper end of the conductive rod 5 is hollow and fixed to the first metal sheet 3 by a flanging riveting process. Thus, the upper end of the solid rivet is hollow, so the upper end of the solid rivet can be riveted and fixed to the first metal sheet 3 by a flanging riveting process, thereby replacing the original welding method, reducing stress concentration problems, and thus reducing the risk of metal fatigue and cracking.

[0040] See also Figure 1-2 as well as Figure 6 The upper cover assembly 2 includes a cover plate 201, a mounting base located at the end of the cover plate 201 facing away from the explosion-proof block 1, and a base 204 located at the end of the cover plate 201 facing the explosion-proof block. The first metal piece 3 is mounted on the mounting base, and the bottom of the base 204 abuts against the limiting boss 501. Specifically, the mounting base includes a mounting body 202 and a top cover 203 covering the mounting body 202. The top of the mounting body 202 has a mounting groove for mounting the first metal piece 3. The upper end of the conductive rod 5 passes through the mounting body 202 and its end is riveted and fixed to the first metal piece 3, thereby fixing the first metal piece 3 in the mounting groove. The limiting boss 501 on the conductive rod 5 abuts against the bottom of the base 204, thereby pressing and connecting the first metal piece 3, the mounting body 202, and the base 204 into a single unit.

[0041] In addition, the bottom of the explosion-proof block 1 has a groove, in which an elastic component is disposed, and the second metal sheet 4 is disposed on the elastic component. Specifically, the elastic component includes an elastic element 6 arranged vertically and a positioning block 7. The upper end of the elastic element 6 abuts against the top wall of the groove, and the lower end of the elastic element 6 abuts against the top of the positioning block 7. The second metal sheet 4 is installed at the bottom of the positioning block 7. The lower end of the conductive rod 5 passes through the explosion-proof block 1, the elastic element 6, and the positioning block 7 in sequence and is welded to the second metal sheet 4 to form an explosion-proof weld point. At this time, the positioning block 7 compresses the elastic element 6 to store elastic potential energy.

[0042] Therefore, based on the above structure, by placing the elastic element 6 and the positioning block 7 into the groove, and passing the other end of the conductive rod 5 through the elastic element 6 and the positioning block 7, the second metal sheet 4 is then installed at the bottom of the positioning block 7, causing the positioning block 7 to compress the elastic element 6 to store elastic potential energy. Finally, the second metal sheet 4 is welded and fixed to the conductive rod 5 to form an explosion-proof weld point. Thus, when the product is operating normally, i.e. in a non-explosion-proof state, if an abnormality occurs at the explosion-proof weld point and it is in a state of near breakage, the elastic element 6 will release its elastic force, and through the positioning block 7, it will cause the second metal sheet 4 to quickly separate from the conductive rod 5, thereby preventing discharge, arcing, and other phenomena from occurring at the weld point between the conductive rod 5 and the second metal sheet 4. This provides multiple protective functions and effectively protects the product.

[0043] During normal explosion-proof operation, when the capacitor cell undergoes permanent breakdown, the resulting gas and temperature will cause the internal pressure of the capacitor to rise. This pressure will act on the easily deformable cover plate 201, causing the cover plate 201 to bulge upwards. This will break the explosion-proof solder joint between the conductive rod 5 and the second metal sheet 4, resulting in an open circuit inside the capacitor, thereby achieving the explosion-proof effect.

[0044] In this embodiment, the elastic element 6 is an elastic ring; of course, in other embodiments, the elastic element 6 can also be a spring or other elastic element, and there are no restrictions on this.

[0045] In this embodiment, two first side plates 101 are arranged at intervals along the front-to-back direction at the bottom of the explosion-proof block 1, and two second side plates 102 are arranged at intervals along the left-to-right direction at the bottom of the explosion-proof block 1. The two first side plates 101 and the two second side plates 102 enclose each other to form the aforementioned groove. The outer walls of the positioning block 7 are respectively attached to the inner walls of the first side plates 101 and the inner walls of the second side plates 102 to achieve limiting, so that the positioning block 7 can only move up and down within the groove.

[0046] Specifically, the second metal sheet 4 has a welding hole 401 in its middle for welding and fixing to the lower end of the conductive rod 5, and both ends of the second metal sheet 4 are fixed to the bottom of the positioning block 7. Specifically, the second metal sheet 4 has limit holes 402 at both ends, and the bottom of the positioning block 7 has a limit post 701 that engages with the limit hole 402. The second metal sheet 4 is fixed by engaging with the limit post 701 through the limit hole 402.

[0047] Therefore, when the second metal piece 4 engages with the limiting post 701 on the positioning block 7 through the limiting hole 402 to achieve limiting and fixing, compared with the method of fixing with rivets, it not only reduces the use of rivet materials and lowers costs, but also makes assembly simpler and more convenient, and greatly improves assembly efficiency.

[0048] In addition, it also includes an insulating block 8 fixed at the bottom of the explosion-proof block 1 and located below the second metal sheet 4. The insulating block 8 is used to separate the explosion-proof solder joint from the capacitor core, thereby achieving electrical isolation between the two and thus playing the role of insulation protection. In addition, the insulating block 8 can also block the transmission of high temperature from the explosion-proof solder joint to the capacitor core and prevent the physical impact generated by the second metal sheet 4 from affecting the core, thereby playing the role of thermal isolation and mechanical isolation.

[0049] The insulating block 8 is a rectangular structure and its four corners are riveted and fixed to the bottom of the explosion-proof block 1 with rivets 9. Of course, in other embodiments, the explosion-proof blocks 1 can also be fixed to each other by screwing or hot-melt (welding, etc.), which is not limited here.

[0050] In summary, the novel explosion-proof capacitor provided by this utility model has the following beneficial effects:

[0051] (i) By setting the conductive rod 5 as a solid rivet and providing a limiting boss 501 around the outer side wall of the solid rivet, when the upper end of the conductive rod 5 passes through the upper cover assembly 2 from bottom to top and its upper end is riveted and fixed to the first metal sheet 3, its limiting boss 501 can abut against the bottom of the upper cover assembly 2, thereby connecting the upper cover assembly 2 into one piece. Therefore, there is no need to set hollow rivets for riveting, which reduces the use of rivet materials, and the assembly is simple and convenient with low assembly accuracy requirements.

[0052] (ii) The upper end of the solid rivet is hollow, so the upper end of the solid rivet can be riveted and fixed to the first metal sheet 3 by the flange riveting process, thereby replacing the original welding scheme, reducing the problem of stress concentration, and thus reducing the risk of metal fatigue and cracking.

[0053] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0054] It should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] Furthermore, in the description of this utility model, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0056] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A novel explosion-proof capacitor, characterized in that, include: Explosion-proof blocks are used to install inside the casing of capacitors; A top cover assembly, which is used to cover the opening of the capacitor's housing and is located above the explosion-proof block; A first metal sheet and a second metal sheet, wherein the first metal sheet is disposed on the upper cover assembly and the second metal sheet is disposed on the explosion-proof block; The conductive rod is a solid rivet with a limiting boss on its outer side wall; the upper end of the conductive rod passes through the upper cover assembly from bottom to top and its upper end is riveted and fixed to the first metal sheet, and the limiting boss abuts against the bottom of the upper cover assembly; the lower end of the conductive rod passes through the explosion-proof block from top to bottom and its lower end is welded and fixed to the second metal sheet to form an explosion-proof weld point.

2. The novel explosion-proof capacitor according to claim 1, characterized in that, The upper end of the conductive rod is hollow and fixed to the first metal sheet by a flange riveting process.

3. The novel explosion-proof capacitor according to claim 1 or 2, characterized in that, The upper cover assembly includes a cover plate, a mounting base located at the end of the cover plate facing away from the explosion-proof block, and a base located at the end of the cover plate facing the explosion-proof block. The first metal sheet is mounted on the mounting base, and the bottom of the base abuts against the limiting boss.

4. The novel explosion-proof capacitor according to claim 3, characterized in that, The mounting base includes a mounting body and a top cover covering the mounting body. The top of the mounting body has a mounting groove for mounting the first metal piece.

5. The novel explosion-proof capacitor according to claim 1 or 2, characterized in that, The bottom of the explosion-proof block has a groove, and an elastic component is disposed in the groove. The second metal sheet is disposed on the elastic component.

6. The novel explosion-proof capacitor according to claim 5, characterized in that, The elastic component includes elastic elements arranged vertically and a positioning block, wherein: One end of the elastic element abuts against the top wall of the groove, and the other end of the elastic element abuts against the top of the positioning block; The second metal sheet is installed at the bottom of the positioning block. The lower end of the conductive rod passes through the explosion-proof block, the elastic element and the positioning block in sequence and is welded to the second metal sheet to form the explosion-proof weld point. The positioning block compresses the elastic element to store elastic potential energy.

7. The novel explosion-proof capacitor according to claim 6, characterized in that, The second metal sheet has a welding hole in the middle for welding and fixing to the lower end of the conductive rod, and the two ends of the second metal sheet are limited and fixed to the bottom of the positioning block.

8. The novel explosion-proof capacitor according to claim 7, characterized in that, The second metal sheet has limit holes at both ends, and the bottom of the positioning block has a limit post that engages with the limit holes. The second metal sheet engages with the limit post through the limit holes to achieve positioning and fixation.

9. The novel explosion-proof capacitor according to claim 1 or 2, characterized in that, It also includes an insulating block fixed to the bottom of the explosion-proof block and located below the second metal sheet, the insulating block being used to separate the explosion-proof solder joint from the capacitor core.

10. The novel explosion-proof capacitor according to claim 9, characterized in that, The insulating block and the explosion-proof block are fixed together by riveting, screwing or hot-melting.

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