Capacitor with multi-protection function explosion-proof structure

Abstract

The utility model discloses a capacitor with a multi-protection function explosion-proof structure, which comprises an explosion-proof block, a cover plate and an electric connection assembly, and is characterized in that the explosion-proof block is arranged in a shell of the capacitor; the cover plate covers the opening of the shell and is positioned at the upper part of the explosion-proof block; the electric connection assembly comprises a first metal sheet arranged on the cover plate, a second metal sheet arranged on the explosion-proof block and a conducting rod which respectively penetrates through the cover plate and the explosion-proof block, one end of the conducting rod is riveted on the first metal sheet, and the other end of the conducting rod is welded and fixed with the second metal sheet. Wherein the explosion-proof block is further provided with elastic assemblies corresponding to the electric connection assemblies in number, each elastic assembly comprises an elastic piece and a positioning block, the second metal sheet is installed at the bottom of the positioning block, and the other end of the conducting rod sequentially penetrates through the elastic piece and the positioning block and is welded to the second metal sheet to form an explosion-proof welding spot. At the moment, the positioning block compresses the elastic piece to store elastic potential energy. Therefore, in a non-explosion-proof state, when an explosion-proof welding spot is abnormal and is in a break-like non-break state, the elastic piece can release elastic force, and the second metal sheet is driven to be quickly separated from the conducting rod through the positioning block, so that the phenomena of discharge, arc discharge and the like of the welding spot of the conducting rod and the second metal sheet are prevented, and a multi-protection effect is further achieved.

Description

Technical Field

[0001] This utility model relates to the field of capacitor explosion-proof technology, specifically to a capacitor with an explosion-proof structure having multiple protection functions. 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 between the capacitor core and the cover plate. The capacitor's leads are fixed to the cover plate mounting base by a rivet, with the other end of the rivet passing through the explosion-proof block and welded to a metal plate mounted on it. Therefore, when the capacitor core experiences permanent breakdown, the generated gas and temperature will cause the internal gas pressure to rise. This pressure acts on the easily deformable cover plate, causing it to bulge upwards, eventually breaking the rivet and the welded metal plate, creating an open circuit inside the capacitor and achieving the explosion-proof effect.

[0004] Therefore, during normal product operation (i.e., in non-explosion-proof condition), the cover plate will not bulge, and thus the explosion-proof welds will not be pulled apart. However, if the explosion-proof welds are abnormal, i.e., in a state of near-breakage, they will discharge and arc. The enormous energy generated by this discharge and arcing can easily blast open the cover plate, posing a high risk. Utility Model Content

[0005] To overcome the defects described in the prior art, this utility model provides a capacitor with an explosion-proof structure featuring multiple protection functions. By setting an elastic component on the explosion-proof block, when the explosion-proof solder joint is abnormal and in a state of near breakage, the elastic component will release its elastic force and drive the second metal sheet to quickly separate from the conductive rod through the positioning block, preventing discharge, arcing, and other phenomena from occurring at the solder joint between the conductive rod and the second metal sheet, thus effectively protecting the product.

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

[0007] A capacitor with an explosion-proof structure featuring multiple protection functions includes:

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

[0009] A cover plate, which is used to cover the opening of the outer casing and is located on top of the explosion-proof block;

[0010] An electrical connection assembly includes a first metal sheet disposed on the cover plate, a second metal sheet disposed on the explosion-proof block, and a conductive rod that passes through the cover plate and the explosion-proof block respectively, with one end connected to the first metal sheet and the other end welded and fixed to the second metal sheet.

[0011] The explosion-proof block is also provided with elastic components corresponding to the number of electrical connection components. The elastic component includes an elastic element and a positioning block. The second metal sheet is installed at the bottom of the positioning block. The other end of the conductive rod passes through the elastic element and the positioning block in sequence and is welded to the second metal sheet to form an explosion-proof weld point. At this time, the positioning block compresses the elastic element to store elastic potential energy.

[0012] Furthermore, the bottom of the explosion-proof block is provided with a groove corresponding to the number of elastic components. The elastic components are placed in the grooves, with the upper end of the elastic component abutting against the top wall of the groove and the lower end of the elastic component abutting against the top of the positioning block. The positioning block can move up and down within the grooves.

[0013] Furthermore, a welding hole is provided in the middle of the second metal sheet for welding with the conductive rod, and the two ends of the second metal sheet are limited and fixed at the bottom of the positioning block.

[0014] Furthermore, the two ends of the second metal sheet are riveted to the bottom of the positioning block; or, the two ends of the second metal sheet are provided with limiting holes, and the bottom of the positioning block is provided with a limiting post that engages with the limiting hole. The second metal sheet engages with the limiting post through the limiting hole to achieve limiting and fixing.

[0015] Furthermore, it also includes an insulating sleeve fixed to the bottom of the explosion-proof block and located below the second metal sheet, the insulating sleeve being used to separate the explosion-proof solder joint from the capacitor core.

[0016] Furthermore, a mounting base is provided on the side of the cover plate facing away from the explosion-proof block, and the first metal sheet is mounted on the mounting base.

[0017] 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.

[0018] Furthermore, the side of the cover plate facing the explosion-proof block is also provided with a riveting base, and the first metal sheet, the mounting base, the cover plate and the riveting base are riveted together as a whole by rivets.

[0019] Furthermore, it also includes hollow rivets, which pass through the first metal sheet, the mounting base, the cover plate and the riveting base from top to bottom, with their upper ends riveted and fixed to the first metal sheet and their lower ends riveted and fixed to the riveting base.

[0020] The conductive rod passes through the hollow rivet.

[0021] Furthermore, the conductive rod is a solid rivet, and a limiting boss is provided on the outer side wall of the solid rivet; the solid rivet passes through the riveting base, the cover plate, the mounting body and the first metal plate from bottom to top and its upper end is riveted and fixed to the first metal plate, and the limiting boss abuts against the riveting base.

[0022] In summary, the capacitor with a multi-protection explosion-proof structure provided by this utility model has the following beneficial effects:

[0023] (1) By setting an elastic component on the explosion-proof block, it can not only prevent explosion normally during the explosion-proof process, but also release the elastic force when the explosion-proof weld point is abnormal and in a state of near breakage in the non-explosion-proof state. The elastic component will also release the elastic force and drive the second metal plate to quickly separate from the conductive rod through the positioning block, so as to prevent the conductive rod and the second metal plate weld point from discharging, arcing and other phenomena, thereby playing a multiple protection role.

[0024] (2) When the second metal piece is engaged with the limiting post on the positioning block through the limiting hole to achieve limiting and fixing, compared with the method of fixing by rivets, it not only reduces the use of rivet materials and lowers the cost, but also makes the assembly simpler and more convenient, greatly improving the assembly efficiency.

[0025] (3) By setting an insulating sleeve at the bottom of the explosion-proof block, the insulating sleeve can separate the explosion-proof solder joint from the inner core of the capacitor, thereby playing the role of insulation protection.

[0026] (4) When the conductive rod is a solid rivet, the rivet base is clamped by setting a limiting boss around the outer wall of the solid rivet, so that there is no need to use the riveting process for fixing, the assembly is simple and convenient, and the cost is reduced. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the explosion of the capacitor according to Embodiment 1 of this utility model;

[0028] Figure 2 for Figure 1 An illustration of the explosion from another perspective;

[0029] Figure 3 This is a schematic diagram of the structure of the capacitor in Embodiment 1 of this utility model;

[0030] Figure 4 for Figure 3 A structural diagram from another perspective;

[0031] Figure 5 for Figure 4 A schematic diagram of the structure after the insulating sleeve has been removed;

[0032] Figure 6 This is a cross-sectional schematic diagram of the capacitor according to Embodiment 1 of this utility model;

[0033] Figure 7 This is an exploded view of the capacitor section structure in Embodiment 2 of this utility model;

[0034] Figure 8 This is a schematic diagram of the capacitor portion structure in Embodiment 2 of this utility model;

[0035] Figure 9 This is a cross-sectional schematic diagram of the capacitor in Embodiment 3 of this utility model.

[0036] The meanings of the reference numerals in the attached figures are as follows:

[0037] 1. Cover plate; 2. Explosion-proof block; 201. Groove; 202. First baffle; 203. Second baffle; 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. First rivet; 9. Mounting base; 901. Mounting base body; 902. Top cover; 10. Hollow rivet; 11. Riveting base; 12. Insulating sleeve; 13. Second rivet. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Example 1

[0042] See Figure 1-6 This utility model provides a capacitor with a multi-protection explosion-proof structure, including a shell (not shown in the figure), an explosion-proof block 2 disposed inside the shell, and a cover plate 1 sealingly covering the opening at the top of the shell and located above the explosion-proof block 2. Additionally, it includes an electrical connection assembly, which includes a first metal plate 3 disposed on the cover plate 1, a second metal plate 4 disposed on the explosion-proof block 2, and a conductive rod 5 passing through the cover plate 1 and the explosion-proof block 2, with one end connected to the first metal plate 3 and the other end welded and fixed to the second metal plate 4. The shell contains a capacitor core (not shown in the figure), which is electrically connected to the second metal plate 4 via a connecting wire.

[0043] Furthermore, the bottom of the explosion-proof block 2 is provided with a groove 201, in which an elastic component corresponding to the electrical connection component is placed. Specifically, a number of first baffles 202 are arranged at intervals along the left-right direction at the bottom of the explosion-proof block 2, and two second baffles 203 are arranged at intervals along the front-back direction at the bottom of the explosion-proof block 2. The groove 201, which is rectangular, is formed between two adjacent first baffles 202 and two adjacent second baffles 203. The elastic component includes an elastic element 6 and a positioning block 7. The second metal sheet 4 is installed at the bottom of the positioning block 7. The other end of the conductive rod 5 passes through the elastic element 6 and the positioning block 7 in sequence and is welded and fixed 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.

[0044] Preferably, the elastic element 6 is an elastic ring, with its upper end abutting against the top wall of the groove 201 and its lower end abutting against the top of the positioning block 7. Of course, in other embodiments, the elastic element can also be a spring; there are no restrictions here. The left and right side walls of the positioning block 7 abut against two adjacent first baffles 202 to achieve limiting, and the front and rear side walls of the positioning block 7 abut against two adjacent second baffles 203 to achieve limiting. Therefore, the positioning block 7 can only move up and down within the groove 201.

[0045] In this embodiment, the electrical connection assembly is provided in three sets and is arranged at intervals along the circumference; the number of the elastic components is consistent with the number of the electrical connection assemblies; the number of the grooves 201 is consistent with the number of the elastic components.

[0046] Therefore, based on the above structure, by placing the elastic element 6 and the positioning block 7 into the groove 201, 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 the positioning block 7 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.

[0047] 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 1, causing the cover plate 1 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, thus achieving the explosion-proof effect.

[0048] In this embodiment, a welding hole 401 is provided in the middle of the second metal sheet 4, the conductive rod 5 passes through the welding hole 401 and is welded to the welding hole 401, and the two ends of the second metal sheet 4 are riveted to the bottom of the positioning block 7 by the first rivet 8.

[0049] See also Figure 1-6 It also includes an insulating sleeve 12 fixed to the bottom of the explosion-proof block 2 and located below the second metal sheet 4. The insulating sleeve 12 is used to separate the explosion-proof solder joint from the inner core of the capacitor, thereby providing insulation protection. The insulating sleeve 12 is riveted to the bottom of the explosion-proof block 2 by a second rivet 13.

[0050] Of course, in other embodiments, the insulating sleeve 12 can also be fixed to the bottom of the explosion-proof block 2 by means of threaded connection, snap-fit ​​connection or heat fusion, and there is no limitation on the fixing method.

[0051] Additionally, a mounting base 9 is provided on the side of the cover plate 1 facing away from the explosion-proof block 2. The mounting base 9 includes a mounting body 901 and a top cover 902 covering the mounting body 901. The top of the mounting body 901 has a mounting groove, and the first metal sheet 3 is mounted on the mounting groove. A riveting base 11 is provided on the side of the cover plate 1 facing the explosion-proof block 2. The mounting body 901, the cover plate 1, and the riveting base 11 are riveted together by hollow rivets 10. Specifically, the hollow rivet 10 passes through the first metal sheet 3, the mounting body 901, the cover plate 1, and the riveting base 11 from top to bottom, and its upper end is riveted and fixed to the first metal sheet 3 by a flange riveting process, and its lower end is riveted and fixed to the riveting base 11 by a flange riveting process. The conductive rod 5 passes through the hollow rivet 10. The conductive rod 5 is a copper rod, and its upper end is welded and fixed to the first metal sheet 3.

[0052] Example 2

[0053] See Figure 7-8 The difference between the capacitor in this embodiment and that in Embodiment 1 is that the way the second metal sheet 4 is fixed on the positioning block 7 is different. In this embodiment, limiting posts 701 protrude from both sides of the bottom of the positioning block 7, and limiting holes 402 are opened at both ends of the second metal sheet 4 to engage with it; thus, the second metal sheet 4 can be fixed by engaging the limiting holes 402 on the second metal sheet 4 with the limiting posts 701.

[0054] Therefore, when the second metal sheet 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 the first rivet 8 in Embodiment 1, it not only reduces the use of rivet material and lowers the cost, but also makes the assembly simpler and more convenient, and greatly improves the assembly efficiency.

[0055] In addition, in this embodiment, the second baffle 203 at the bottom of the explosion-proof block 2 extends downward to form a deeper groove 201, thereby further improving the limiting effect on the positioning block 7 and ensuring the stability of the positioning block 7 moving up and down within the groove 201. Preferably, the height of the second baffle 203 is greater than or equal to 10mm.

[0056] Example 3

[0057] See Figure 9The difference between the capacitor in this embodiment and that in Embodiment 1 lies in the structure of its conductive rod 5. In this embodiment, the conductive rod 5 is a solid rivet, and a limiting boss 501 is provided around the outer side wall of the solid rivet. The solid rivet passes through the riveting base 11, the cover plate 1, the mounting base 901, and the first metal sheet 3 from bottom to top. The upper end of the solid rivet is a hollow structure and is riveted and fixed to the first metal sheet 3 by a flanging process. The limiting boss 501 of the solid rivet abuts against the bottom of the riveting base 11 to achieve a locking action.

[0058] Therefore, when the conductive rod 5 is a solid rivet, the rivet base 11 is fixed by clamping a limiting boss 501 around the outer wall of the solid rivet, thus eliminating the need for riveting process for fixing, making assembly simple and convenient, and reducing costs.

[0059] In summary, the capacitor with a multi-protection explosion-proof structure provided by this utility model has the following beneficial effects:

[0060] (i) By setting an elastic component on the explosion-proof block 2, it can not only prevent explosions normally during the explosion-proof process, but also release the elastic force when the explosion-proof weld point is abnormal and in a state of being on the verge of breaking in the non-explosion-proof state. The elastic component 6 will then release the elastic force and drive the second metal plate 4 to quickly separate from the conductive rod 5 through the positioning block 7, so as to prevent the conductive rod 5 and the second metal plate 4 from discharging, arcing and other phenomena, thereby playing a multiple protection role.

[0061] (ii) When the second metal piece 4 is engaged with the limiting post 701 on the positioning block 7 through the limiting hole 402 to achieve limiting and fixing, compared with the fixing method by rivets, it not only reduces the use of rivet materials and lowers the cost, but also makes the assembly simpler and more convenient, and greatly improves the assembly efficiency.

[0062] (iii) By setting an insulating sleeve 12 at the bottom of the explosion-proof block 2, the insulating sleeve 12 can separate the explosion-proof solder joint from the inner core of the capacitor, thereby playing the role of insulation protection.

[0063] (iv) When the conductive rod 5 is a solid rivet, the rivet base 11 is clamped by setting a limiting boss 501 around the outer wall of the solid rivet, so that there is no need to use the riveting process for fixing, the assembly is simple and convenient, and the cost is reduced.

[0064] 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.

[0065] 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.

[0066] Furthermore, in the description of this utility model, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0067] 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 capacitor with an explosion-proof structure featuring multiple protection functions, characterized in that, include: Explosion-proof blocks are used to be installed inside the casing of capacitors; A cover plate, which is used to cover the opening of the outer casing and is located on top of the explosion-proof block; An electrical connection assembly includes a first metal sheet disposed on the cover plate, a second metal sheet disposed on the explosion-proof block, and a conductive rod that passes through the cover plate and the explosion-proof block respectively, with one end connected to the first metal sheet and the other end welded and fixed to the second metal sheet. The explosion-proof block is also provided with elastic components corresponding to the number of electrical connection components. The elastic component includes an elastic element and a positioning block. The second metal sheet is installed at the bottom of the positioning block. The other end of the conductive rod passes through the elastic element and the positioning block in sequence and is welded to the second metal sheet to form an explosion-proof weld point. At this time, the positioning block compresses the elastic element to store elastic potential energy.

2. The capacitor according to claim 1, characterized in that, The bottom of the explosion-proof block has a groove corresponding to the number of elastic components. The elastic components are placed in the grooves, with the upper end of the elastic component abutting against the top wall of the groove and the lower end of the elastic component abutting against the top of the positioning block. The positioning block can move up and down within the grooves.

3. The capacitor according to claim 1, characterized in that, The second metal sheet has a welding hole in the middle for welding with the conductive rod, and the two ends of the second metal sheet are fixed to the bottom of the positioning block.

4. The capacitor according to claim 3, characterized in that, The two ends of the second metal sheet are riveted to the bottom of the positioning block; or, the two ends of the second metal sheet are provided with limiting holes, and the bottom of the positioning block is provided with a limiting post that engages with the limiting hole. The second metal sheet engages with the limiting post through the limiting hole to achieve limiting and fixing.

5. The capacitor according to any one of claims 1-4, characterized in that, It also includes an insulating sleeve fixed to the bottom of the explosion-proof block and located below the second metal sheet, the insulating sleeve being used to separate the explosion-proof solder joint from the capacitor core.

6. The capacitor according to any one of claims 1-4, characterized in that, A mounting base is also provided on the side of the cover plate facing away from the explosion-proof block, and the first metal sheet is mounted on the mounting base.

7. The capacitor according to claim 6, 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.

8. The capacitor according to claim 7, characterized in that, The side of the cover plate facing the explosion-proof block is also provided with a riveting base, and the first metal sheet, the mounting base, the cover plate and the riveting base are riveted together as a whole by rivets.

9. The capacitor according to claim 8, characterized in that, It also includes hollow rivets, which pass through the first metal sheet, the mounting base, the cover plate and the riveting base from top to bottom, with their upper ends riveted and fixed to the first metal sheet and their lower ends riveted and fixed to the riveting base. The conductive rod passes through the hollow rivet.

10. The capacitor according to claim 8, characterized in that, The conductive rod is a solid rivet, and a limiting boss is provided on the outer side wall of the solid rivet; the solid rivet passes through the riveting base, the cover plate, the mounting body and the first metal plate from bottom to top and its upper end is riveted and fixed to the first metal plate, and the limiting boss abuts against the riveting base.

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