CN109671567B - Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate - Google Patents
Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate Download PDFInfo
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- CN109671567B CN109671567B CN201910084258.7A CN201910084258A CN109671567B CN 109671567 B CN109671567 B CN 109671567B CN 201910084258 A CN201910084258 A CN 201910084258A CN 109671567 B CN109671567 B CN 109671567B
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- 238000007789 sealing Methods 0.000 title claims abstract description 172
- 239000003990 capacitor Substances 0.000 title claims abstract description 54
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010417 needlework Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a sealing device and a sealing method for an inner ring of a large-capacity hollow bolt type aluminum capacitor cover plate, wherein the sealing device comprises an inner sealing seat, a double-head inner sealing needle structure and an inner sealing shaft, the inner sealing shaft is arranged on the sealing device, the inner sealing seat is arranged at the top end of the inner sealing shaft, the double-head inner sealing needle structure is fixed on the inner sealing seat, and the double-head inner sealing needle structure is driven to rotate under the driving of the sealing device so as to seal the inner ring of the capacitor cover plate; the invention adopts a careful design, utilizes a double-head sealing needle structure, and does not use a bearing, and is a very accurate cover plate inner ring sealing device and a sealing method thereof. The invention not only solves the problem of inner ring sealing of the large-capacity hollow aluminum capacitor, but also solves the problem that the production is forced to be interrupted and the mass production is difficult due to the failure of the inner ring sealing device in the past. Meanwhile, the aluminum capacitor manufactured by the method has very stable electrical performance parameters.
Description
Technical Field
The invention relates to the field of capacitors, in particular to a sealing device and a sealing method for an inner ring of a cover plate of a high-capacity hollow bolt type aluminum capacitor.
Background
With the increasing trend of localization of electronic components, the performance requirements for aluminum electrolytic capacitors are also increasing. In particular, the requirements for high temperature, high voltage, large capacity, long life, small volume and the like are urgent. For example, high capacity bolt type aluminum capacitors can generate a lot of heat at the center of the capacitor under high temperature (e.g., 105-125 ℃) and high voltage (e.g., 400V and above) loads, and the internal temperature can rise sharply, sometimes far beyond the rated operating temperature of the capacitor. This will deteriorate the thermal stability of the electrode material, electrolyte and electrolytic paper inside the capacitor, severely affecting the life of the capacitor. In order to improve the working efficiency and the service life of the high-capacity, high-temperature and high-voltage aluminum capacitor, the problem of heat dissipation inside the capacitor must be solved. Therefore, hollow or open-core aluminum electrolytic capacitors are produced, see chinese patent CN202513038U, CN207852489U, CN208077805U, CN208077806U, CN205984660U and CN108320915A, etc. However, the main technical difficulty in producing the high-capacity hollow bolt type aluminum capacitor is the sealing problem of the inner ring of the cover plate. In the sealing process of the hollow aluminum capacitor cover plate, if a sealing method with a traditional structure is adopted, the sealing stress is uneven, the bearing in the original sealing device is easy to damage due to the limited action space, and the appearance quality of the sealing of the product is also influenced. Meanwhile, the original sealing method also causes interruption of the sealing operation procedure, and seriously affects the production efficiency. If the inner ring of the hollow capacitor is poorly sealed, not only the volatilization of the electrolyte can be accelerated, but also the capacitor can leak liquid and fail when serious.
Disclosure of Invention
In order to solve the technical problems of unbalanced stress, poor sealing appearance, easy interruption of sealing operation, low production efficiency and the like in the sealing of the inner ring of the large-capacity hollow bolt type aluminum capacitor cover plate, the invention adopts a careful design, utilizes a double-head sealing needle structure, and does not use a bearing, thereby being a very accurate sealing device for the inner ring of the cover plate and a sealing method thereof. The invention not only solves the problem of inner ring sealing of the large-capacity hollow aluminum capacitor, but also solves the problem that the production is forced to be interrupted and the mass production is difficult due to the failure of the inner ring sealing device in the past. Meanwhile, the aluminum capacitor manufactured by the method has very stable electrical performance parameters.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a high-capacity hollow bolt type aluminum capacitor cover plate inner circle sealing device, includes interior seal seat, double-end interior seal needle structure and interior seal axle, interior seal axle is installed on sealing device, interior seal seat is installed in interior seal axle's top, the double-end interior seal needle structure is fixed on interior seal seat, under sealing device's drive, drives the rotatory extrusion of double-end interior seal needle structure, and then seals capacitor cover plate inner circle.
Preferably, the inner sealing seat is composed of an upper connecting plate and a lower cover plate, the upper connecting plate is fixed at the top end of the inner sealing shaft, and the double-head inner sealing needle structure is arranged between the upper connecting plate and the lower cover plate.
Preferably, the double-ended inner seal needle structure comprises a main body part and two seal needle parts, wherein the two seal needle parts and the main body part are fixed into a whole, and a central groove is formed in the middle of the main body part.
Preferably, the lower cover plate is provided with a central hole, a screw is arranged in the central hole, and the screw penetrates through the central hole and limits the double-head inner sealing needle structure in the central groove.
Preferably, the width of the central groove is 4.2mm, the depth is 1mm, and the screw is screw M4.
Preferably, the two sealing needle parts are symmetrically arranged at two sides of the main body part, and the sealing needle parts are provided with a circle of concave ring.
Preferably, the cross section of the concave ring is semicircular.
Preferably, the inner sealing seat is provided with a screw hole, and the lower cover plate and the upper connecting plate are fixedly connected through a locking screw penetrating through the screw hole.
The sealing method of the sealing device of the inner ring of the cover plate of the high-capacity hollow bolt type aluminum capacitor comprises the following steps:
step one: the inner sealing seat is arranged at the top end of the inner sealing shaft, and the double-head inner sealing needle structure is fixed on the inner sealing seat;
step two: the inner sealing shaft is driven by the sealing device to rotate, the double-head inner sealing needle structure rotates under the power action of the inner sealing shaft, and sealing needle parts at the left and right positions of the double-head inner sealing needle structure exert force inwards at the same time when rotating, so that the inner ring aluminum shell is uniformly stressed when being bent, and inner ring encapsulation is completed.
The beneficial effects of the invention are as follows:
the sealing device and the sealing method for the inner ring of the large-capacity hollow bolt type aluminum capacitor cover plate can completely solve the technical problems existing in the prior sealing technology, and the sealing position can be accurately controlled without using a bearing in the sealing device. In the sealing process, the inner ring aluminum shell is easily and freely positioned, so that the stress is uniform when the inner ring aluminum shell is bent, the service life of equipment is prolonged, the sealing operation procedure is ensured not to be interrupted, and the sealing accuracy of the hollow aluminum capacitor and the appearance quality of products are greatly improved.
Drawings
Fig. 1 is a schematic operation diagram of a double-ended inner sealing needle structure for sealing an inner ring of a hollow aluminum capacitor cover plate.
Fig. 2 is a schematic structural diagram of a double-ended inner sealing needle for sealing the inner ring of the hollow aluminum capacitor cover plate.
Fig. 3 is a schematic diagram of the inner sealing shaft for sealing the inner ring of the hollow aluminum capacitor cover plate.
FIG. 4 is a cross-sectional view taken along the A-A plane in FIG. 3.
FIG. 5 is a schematic view of a prior art seal for the inner ring of a hollow bolt type aluminum electrolytic capacitor cover plate.
Wherein: 1-inner rubber ring, 2-outer rubber ring, 3-positive terminal, 4-negative terminal, 5-inner ring seal, 6-cover plate, 7-outer rubber ring seal, 8-inner seal seat, 81-upper connecting plate, 82-lower connecting plate, 9-double-head inner seal needle structure, 91-concave ring, 10-inner seal shaft, 11-locking screw, 12-central hole and 13-central groove.
Detailed Description
In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 5, the invention relates to a schematic diagram of the inner ring seal of a cover plate of a high-capacity hollow bolt type aluminum electrolytic capacitor. Because the inner ring of the cover plate 6 is small, the acting space of the sealing equipment is easy to be blocked. The traditional sealing method leads the aluminum shell of the inner ring to be subjected to the action of larger lateral pressure when being bent, and leads the bearing with edges in the traditional sealing device to bear the larger lateral pressure for a long time, thereby being extremely easy to cause the damage of the bearing with edges. It is counted that the bearing is damaged when about 10 parts are processed by adopting the traditional sealing method, and the sealing operation is forced to be interrupted, so that the production efficiency is seriously affected.
The capacitor generally includes an outer rubber seal 7, an outer rubber seal 2, a cover plate 6, an inner rubber seal 1, an inner ring seal 5, and positive and negative terminals 3 and 4.
Examples:
referring to fig. 1-4, the sealing device for the inner ring of the cover plate of the high-capacity hollow bolt type aluminum capacitor comprises an inner sealing seat 8, a double-head inner sealing needle structure 9 and an inner sealing shaft 10, wherein the inner sealing shaft 10 is arranged on the sealing device, the inner sealing seat 8 is arranged at the top end of the inner sealing shaft 10, the inner sealing shaft 10 is clamped on a rotating shaft of a main machine of the sealing device, the inner sealing shaft is driven to rotate at a constant speed in the sealing process, the double-head inner sealing needle structure 9 is fixed on the inner sealing seat 8, and the double-head inner sealing needle structure 9 is driven to rotate under the driving of the sealing device so as to seal the inner ring of the cover plate of the capacitor.
Specifically, the inner sealing seat 8 is composed of an upper connecting plate 81 and a lower cover plate 82, the upper connecting plate 81 is fixed at the top end of the inner sealing shaft 10, the double-end inner sealing needle structure is installed between the upper connecting plate 81 and the lower cover plate 82, the double-end inner sealing needle structure comprises a main body part and two sealing needle parts, the two sealing needle parts and the main body part are fixed into a whole, a central groove 13 is formed in the middle of the main body part, the lower cover plate 82 is provided with a central hole 12, a screw is arranged in the central hole 12, the screw penetrates through the central hole 12 and limits the double-end inner sealing needle structure in the central groove 13, the central groove is 4.2mm wide and 1mm deep, and the screw is a screw M4; the diameter of the screw M4 is 4mm, the width of the central groove is 4.2mm, that is to say, the double-head inner sealing needle structure can realize the automatic centering limiting function in the rotating process, and the screw M4 can be automatically fine-tuned in the axial direction;
the inner sealing seat 8 is provided with a screw hole, and the lower cover plate 82 and the upper connecting plate 81 are fixedly connected through the screw hole by a locking screw 11.
The double-ended inner seal needle structure 9 is connected to the inner seal holder 8 and is actually a shaft located above the hollow capacitor clamp holder.
The two sealing needle parts are symmetrically arranged on two sides of the main body part, a circle of concave ring 91 is processed on the sealing needle part, and the section of the concave ring is semicircular; the concave ring 91 is arranged to be in seamless contact with the aluminum shell in the inner ring, meanwhile, as can be seen from fig. 2, the joint of the concave ring 91 and the main body part is also processed with an arc chamfer surface, 92, and the processing of the arc chamfer surface 92 ensures that the double-end inner seal needle structure is tightly pressed and limited with the inner ring better in the process of rotating the inner seal, and the inner seal structure has good quality.
The novel hollow capacitor cover plate inner ring sealing device adopts a double-head sealing needle structure. The double-ended sealing needle device with the new design mainly comprises an inner sealing seat 8 and a double-ended inner sealing needle structure 9. In the sealing operation of the inner ring of the cover plate, the inner sealing seat 8 is firstly arranged at the top end of the inner sealing shaft 10, then the double-head sealing needle is fixed on the inner sealing seat 8, and the inner ring aluminum shell can be bent and inserted into the inner sealing rubber ring by rotating the double-head sealing needle. Because the sealing needle parts at the left and right positions simultaneously exert force to the inner sides when rotating, the abrasion degree of the double-end sealing part is greatly reduced. The cover plate inner ring sealing device can ensure that the double-end sealing needle works stably under the condition that a bearing is not used, and because the double-end sealing needle can simultaneously and respectively generate acting force to the inner side, namely the pressures at the left side and the right side are mutually offset, the stress is uniform when the inner ring aluminum shell is bent, the shape and the size of a product during sealing are accurately controlled, the sealing operation is not interrupted, the sealing appearance is smooth and attractive, and the product quality is greatly improved.
The sealing method of the sealing device of the inner ring of the cover plate of the high-capacity hollow bolt type aluminum capacitor comprises the following steps:
step one: the inner sealing seat 8 is arranged at the top end of the inner sealing shaft 10, and the double-head inner sealing needle structure 9 is fixed on the inner sealing seat 8;
step two: under the power effect of the inner sealing shaft 10, the double-end inner sealing needle structure 9 is rotated, the sealing needle parts at the left and right positions of the double-end inner sealing needle structure 9 exert force to the inner side simultaneously during rotation, so that stress is uniform during bending of the inner ring aluminum shell, inner ring encapsulation is completed, the inner sealing shaft drives the double-end inner sealing needle structure to rotate at a constant speed during sealing, the sealing needles at the left and right positions of the double-end inner sealing needle structure respectively squeeze the inner ring aluminum shell through semicircular concave rings, and the aluminum shell is sealed during constant speed rotation, so that better positioning effect can be achieved through the double-end sealing needle of the semicircular concave ring 91 structure during the process.
When preparing 450V5600 mu F large-scale bolt aluminum electrolytic capacitor, firstly cutting positive and negative electrode aluminum foils and electrolytic paper into designed width, nailing and rolling the cut positive and negative electrode aluminum foils and electrolytic paper together into capacitor core, then injecting electrolyte, adopting the cover plate inner ring packaging method of the invention to package, sleeve, aging and other procedures, then carrying out electric performance detection on the capacitor with the specification, and the test parameters are shown in Table 1
Table 1 test parameters for 450v5600 uf hollow bolt aluminum electrolytic capacitors
As seen from table 1, all electrical parameters meet the standard values. The effects of the present invention are apparent from the description.
The invention adopts a careful design, utilizes a double-head sealing needle structure, and does not use a bearing, and is a very accurate cover plate inner ring sealing device and a sealing method thereof. The invention not only solves the problem of inner ring sealing of the large-capacity hollow aluminum capacitor, but also solves the problem that the production is forced to be interrupted and the mass production is difficult due to the failure of the inner ring sealing device in the past. Meanwhile, the aluminum capacitor manufactured by the method has very stable electrical performance parameters.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. High-capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device is characterized in that: including interior seal seat, double-end interior seal needle structure and interior seal axle, interior seal axle is installed on closing device, interior seal seat installs in interior seal axle's top, the double-end interior seal needle structure is fixed on interior seal seat, under closing device's drive, drives seal needle structure rotatory extrusion in the double-end, and then seal capacitor cover plate inner circle, interior seal seat comprises upper junction plate and lower apron, the upper junction plate is fixed interior seal axle top, seal needle structure installs in the double-end upper junction plate with between the apron down, seal needle structure includes main part and two seal needle parts in the double-end seal needle part with main part is fixed as an organic wholely, and open in the middle of the main part has the centre tank.
2. The high capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device as claimed in claim 1, wherein: the lower cover plate is provided with a central hole, a screw is arranged in the central hole, and the screw penetrates through the central hole and limits the double-head inner sealing needle structure in the central groove.
3. The high capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device as claimed in claim 2, wherein: the width of the central groove is 4.2mm, the depth of the central groove is 1mm, and the screw is screw M4.
4. A high capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device as claimed in claim 3, wherein: the two sealing needle parts are symmetrically arranged on two sides of the main body part, and a circle of concave ring is processed on the sealing needle parts.
5. The high capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device according to claim 4, wherein: the section of the concave ring is semicircular.
6. The high capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device according to claim 4, wherein: the inner sealing seat is provided with a screw hole, and the lower cover plate and the upper connecting plate are fixedly connected through a locking screw penetrating through the screw hole.
7. The sealing method of the inner ring sealing device of the cover plate of the high-capacity hollow bolt type aluminum capacitor as claimed in any one of claims 1 to 6, comprising the following steps:
step one: the inner sealing seat is arranged at the top end of the inner sealing shaft, and the double-head inner sealing needle structure is fixed on the inner sealing seat;
step two: the inner sealing shaft is driven by the sealing device to rotate, the double-head inner sealing needle structure rotates under the power action of the inner sealing shaft, and sealing needle parts at the left and right positions of the double-head inner sealing needle structure exert force inwards at the same time when rotating, so that the inner ring aluminum shell is uniformly stressed when being bent, and inner ring encapsulation is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084258.7A CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084258.7A CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
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| Publication Number | Publication Date |
|---|---|
| CN109671567A CN109671567A (en) | 2019-04-23 |
| CN109671567B true CN109671567B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910084258.7A Active CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211600A (en) * | 1994-01-20 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Opening-sealing apparatus of aluminum electrolytic capacitor |
| CN202093990U (en) * | 2011-05-13 | 2011-12-28 | 湖南耐普恩电能科技有限公司 | Integral packaging structure for super capacitor |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN102522199A (en) * | 2011-12-19 | 2012-06-27 | 上海一点点电子科技有限公司 | Fixing method of bolt-type aluminum electrolytic capacitor core package with good heat dispersion |
| CN108320915A (en) * | 2018-03-05 | 2018-07-24 | 南通海立电子有限公司 | A kind of aluminium electrolutic capacitor and split type core |
| CN209168949U (en) * | 2019-01-29 | 2019-07-26 | 深圳江浩电子有限公司 | Ring seal device in large capacity hollow bolt type aluminum capacitor cover board |
-
2019
- 2019-01-29 CN CN201910084258.7A patent/CN109671567B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211600A (en) * | 1994-01-20 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Opening-sealing apparatus of aluminum electrolytic capacitor |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN202093990U (en) * | 2011-05-13 | 2011-12-28 | 湖南耐普恩电能科技有限公司 | Integral packaging structure for super capacitor |
| CN102522199A (en) * | 2011-12-19 | 2012-06-27 | 上海一点点电子科技有限公司 | Fixing method of bolt-type aluminum electrolytic capacitor core package with good heat dispersion |
| CN108320915A (en) * | 2018-03-05 | 2018-07-24 | 南通海立电子有限公司 | A kind of aluminium electrolutic capacitor and split type core |
| CN209168949U (en) * | 2019-01-29 | 2019-07-26 | 深圳江浩电子有限公司 | Ring seal device in large capacity hollow bolt type aluminum capacitor cover board |
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