CN210467604U - Aluminum electrolytic capacitor - Google Patents
Aluminum electrolytic capacitor Download PDFInfo
- Publication number
- CN210467604U CN210467604U CN201921648306.2U CN201921648306U CN210467604U CN 210467604 U CN210467604 U CN 210467604U CN 201921648306 U CN201921648306 U CN 201921648306U CN 210467604 U CN210467604 U CN 210467604U
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- CN
- China
- Prior art keywords
- aluminum
- electrolytic capacitor
- aluminum electrolytic
- sealant
- core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 112
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 239000003990 capacitor Substances 0.000 title claims abstract description 45
- 239000000565 sealant Substances 0.000 claims abstract description 38
- 239000004411 aluminium Substances 0.000 claims abstract description 15
- 239000011888 foil Substances 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000002378 acidificating effect Effects 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 20
- 239000003292 glue Substances 0.000 description 8
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- -1 moisture Chemical compound 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The application provides an aluminum electrolytic capacitor, this aluminum electrolytic capacitor includes core, aluminum hull, apron, aluminium rivet and draws forth the inserted sheet, and wherein, the core sets up in the aluminum hull, and the aluminum hull forms sealedly with the apron lock, and the upper surface of apron is partly stretched out to the core of aluminium rivet connection, and aluminum electrolytic capacitor still includes the sealant layer that covers the apron upper surface, and the height that highly is greater than or equal to the aluminium rivet of seal sandwich stretches out the upper surface. By the aid of the compact, moisture-proof and corrosion-proof sealant, the aluminum electrolytic capacitor can be used under the conditions of acid-base property or severe environment, and service life is prolonged; the good physical and mechanical properties of the sealant are utilized, so that the sealant has good adhesion and flexibility to a substrate and an element, and the impact resistance of the capacitor is improved; the leading-out end on the cover plate is easy to corrode under an acidic condition, and the leading-out end can be isolated from contacting with acidic substances by coating the sealant, so that the corrosion resistance is improved.
Description
Technical Field
The utility model relates to the field of electronic components, and more specifically relates to an aluminum electrolytic capacitor.
Background
The traditional aluminum electrolytic capacitor is sealed by an aluminum shell and a cover plate, the principle is that an opening of the aluminum shell is reversely buckled on a glue layer on the surface of the cover plate, and the product is sealed by controlling the glue entering depth of the aluminum shell.
The lead-out terminal on the cover plate used at home and abroad at present is made of tin-plated iron-clad copper, the rivet connected with the inner core of the aluminum shell is made of aluminum, no protective layer is arranged outside, the rivet is directly exposed in the air, and electrochemical corrosion is easily formed under the severe environmental conditions of acidity, humidity, salt spray, mould and the like.
The existing soldering lug capacitor develops towards high-voltage miniaturization, the applied environment is more and more severe, such as sea, desert, photovoltaic power generation and the like, oxygen, moisture, sulfur dioxide, acid-base gas and the like in the air are easily adsorbed at the positions of pores, cracks and the like on the surface of metal, penetrate through a metal oxide layer to enter the metal to be corroded, and the following hidden troubles can be caused in the presence of humidity: 1) corrosion can affect the sealing performance of the product, cause the performance of the product to be reduced and shorten the service life; 2) only one layer of ethylene propylene diene monomer with the thickness of 1mm is arranged on the cover plate, so that the cover plate is easy to break when being impacted externally, and the sealing performance and the service life of a product are influenced; 3) the rivet connected with the core on the cover plate is corroded, so that the resistance of the leading-out terminal is increased, the heat production is increased, and even potential safety hazards such as explosion and the like are avoided; 4) the corrosion causes the foil strip to break, the equipment can not provide stable output power, and the safety of the whole machine is affected.
SUMMERY OF THE UTILITY MODEL
In view of the above problems in the prior art, the present application provides a novel aluminum electrolytic capacitor, which improves the sealing ability and the impact resistance, and avoids the corrosion phenomenon.
The application provides an aluminum electrolytic capacitor, including core, aluminum hull, apron, aluminium rivet and draw forth the inserted sheet, wherein, the core set up in the aluminum hull, the aluminum hull with the apron lock forms sealedly, aluminium riveted connection the core has and stretches out the extension of the upper surface of apron, draw forth the inserted sheet be in extension department with aluminium riveted connection, aluminum electrolytic capacitor is still including covering the sealant layer of apron upper surface, sealant layer highly be greater than or equal to the aluminium rivet the height of extension. By the aid of the compact, moisture-proof and corrosion-proof sealant, the aluminum electrolytic capacitor can be used under the conditions of acid-base property or severe environment, and service life is prolonged; the good physical and mechanical properties of the sealant are utilized, so that the sealant has good adhesion and flexibility to a substrate and an element, and the impact resistance of the capacitor is improved; the leading-out end on the cover plate is easy to corrode under an acidic condition, and the leading-out end can be isolated from contacting with acidic substances by coating the sealant, so that the corrosion resistance is improved.
In one embodiment, the height of the sealant layer is 1-4 mm.
In one embodiment, the height of the sealant layer is 0.5-2 mm greater than the height of the aluminum rivet extending out of the upper surface.
In one embodiment, the height of the sealant layer is less than the thickness of the aluminum case. By the embodiment, the cost can be saved while the appearance is kept beautiful.
In one embodiment, the aluminum electrolytic capacitor further comprises an insulating sleeve sleeved outside the aluminum case.
In one embodiment, the insulating sleeve includes a beam waist structure. By this embodiment, the joint stability of the sleeve and the aluminum case can be improved.
In one embodiment, the sealant is a polyurethane adhesive.
In one embodiment, the aluminum housing includes a stiffener and an explosion-proof valve.
In one embodiment, the core is formed by winding a positive aluminum foil, an electrolytic paper and a negative aluminum foil in an overlapping manner, and the liquid dielectric medium is contained in the core.
Compared with the prior art, the aluminum electrolytic capacitor provided by the application has the following beneficial effects:
1) the compact, moisture-proof and corrosion-proof sealant is utilized, so that the capacitor can be used under the conditions of acid-base property or severe environment, and the service life is prolonged;
2) the good physical and mechanical properties of the sealant are utilized, so that the sealant has good adhesion and flexibility to a substrate and an element, and the impact resistance of the capacitor is improved;
3) the connection part of the leading-out inserting piece on the cover plate and the aluminum rivet is easy to corrode under an acidic condition, and the connection point of the leading-out end can be isolated from contacting with an acidic substance by coating the sealant, so that the corrosion resistance is improved.
The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 shows a cross-sectional view of an aluminum electrolytic capacitor according to an embodiment of the present invention;
fig. 2 shows a schematic flow diagram of a method of manufacturing an aluminum electrolytic capacitor according to an embodiment of the present invention.
List of reference numerals:
10-an aluminum electrolytic capacitor; 1-a core; 2-an aluminum shell; 3-cover plate; 4-aluminum rivets; 5-leading out the inserting piece; 6-an insulating sleeve; 7-corset structure; 8-positive electrode foil guide strip; 8' -negative electrode foil guide strips; 9-sealant layer.
In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 shows a cross-sectional view of an aluminum electrolytic capacitor 10 provided by the present invention. As shown in fig. 1, the aluminum electrolytic capacitor 10 includes a core 1, an aluminum case 2, a cover plate 3, an aluminum rivet 4 and a lead-out insertion sheet 5, wherein the core 1 is disposed in the aluminum case 2, the aluminum case 2 is fastened with the cover plate 3 to form a seal, two aluminum rivets 4 are connected to the core and have a protruding portion protruding from an upper surface of the cover plate, and the lead-out insertion sheet 5 is connected to the aluminum rivet 4 at the protruding portion of the aluminum rivet 4.
Specifically, the core 1 is formed by winding a positive electrode aluminum foil, an electrolytic paper and a negative electrode aluminum foil in an overlapping manner, and the core 1 is sealed with an aluminum case 2 and a cover plate 3 after being impregnated with a liquid dielectric medium. The positive aluminum foil and the negative aluminum foil are respectively connected with the positive foil guide strip and the negative foil guide strip. Two aluminum rivets 4 penetrate through the cover plate 3, the upper ends of the two aluminum rivets 4 are respectively connected with two leading-out insertion pieces 5, and the lower ends of the two aluminum rivets 4 are respectively riveted with a positive electrode foil guide strip 8 and a negative electrode foil guide strip 8'. The lengths of the positive and negative foil guides are generally the same. Further, the aluminum case 2 is provided with concave portions which are recessed inward at the waist portion and the top portion and which can be engaged with the corset structure 7 (concave portion having the same shape as the concave portion on the aluminum case) on the insulating sleeve 6, thereby increasing the bonding stability of the sleeve 6 and the aluminum case 2. The aluminum shell 2 further comprises a reinforcing rib and an explosion-proof valve.
In the embodiment of the present invention, the aluminum electrolytic capacitor 10 further includes a sealant layer 9, the sealant layer 9 covers the upper surface of the cover plate 3, and the height of the sealant layer 9 is greater than or equal to the height of the extension part of the aluminum rivet 4 extending out of the upper surface of the cover plate 3, and the sealant layer 9 covers the connection part of the lead-out insert 5 and the aluminum rivet 4. By this configuration, the aluminum rivet 4 can be isolated from the external environment, avoiding corrosion of the aluminum rivet in harsh environments.
Because there is liquid electrolyte in the aluminium electrolytic capacitor 10, in the use, take place complicated chemical reaction at all times, consume electrolyte and aluminium material, when aluminium electrolytic capacitor 10 used under adverse circumstances, inside heating aggravated, produced a large amount of gas, easily burst from the sealed defect department of apron 3 and aluminum hull 2, cause the sealed inefficacy of condenser. The utility model discloses in, through sealed glue of upper surface coating at apron 3, joinable aluminum hull 2 and apron 3 improve the 10 leakproofness of condenser.
Preferably, the sealant is a polyurethane adhesive.
As described above, in the prior art, a layer of ethylene propylene diene monomer (epdm) with a thickness of 1mm is usually disposed on the cover plate 3, so that the cover plate has poor impact resistance and is easily broken. The utility model discloses use sealed glue to replace EPDM to glue, because sealed glue has good physics mechanical property, has good adhesion and pliability to base plate and component, has the temperature resistance more than 200 ℃ to can bear-60 ~ 125 ℃ repeated temperature impact and not ftracture, not delaminating, improved the shock resistance of condenser.
The lead-out insert 5 on the cover plate is tinned by iron-clad copper, oxygen, moisture, chloride ions, mould and the like in the air are easily adsorbed on the holes, cracks and other parts of the metal surface, penetrate through the metal oxide layer and the protective layer to enter the capacitor, and accelerate corrosion is realized, so that the performance and the service life of the capacitor are greatly reduced. So that the capacitor cannot be used in a severe environment. And through coating sealed glue, the height of this sealed glue is higher than the height of drawing out the junction of inserted sheet and aluminium rivet for can be in outside acid environment with this connection and keep apart, utilize sealed damp proof corrosion protection performance, improve the life of condenser under adverse circumstances.
Preferably, the height of the sealant layer 9 is 1 to 4 mm.
Preferably, the height of the sealant layer 9 is 0.5-2 mm greater than the height of the protruding portion of the aluminum rivet 4 protruding from the upper surface.
Preferably, the thickness of the sealant layer 9 is less than that of the aluminum shell 2, so that the usage amount of the sealant and the lead-out insert sheet material is saved while the overall appearance is kept, and the cost is reduced.
Fig. 2 shows a method 20 for manufacturing the aluminum electrolytic capacitor 10 according to the present invention. As shown in fig. 2, the method 2 includes:
s21, arranging the core 1 in the aluminum shell 2;
s22, buckling the aluminum shell 2 and the cover plate 3 to form a closed structure;
s23, arranging two aluminum rivets 4 on the cover plate 3, wherein one ends of the aluminum rivets 4 extending out of the lower surface of the cover plate 3 are connected with the core 1, and the other ends of the aluminum rivets 4 extending out of the upper surface of the cover plate 3 are respectively connected with two leading-out inserting pieces 5;
s24, covering a sealant layer 9 on the upper surface of the cover plate 3, wherein the height of the sealant layer 9 is greater than the height of the other end of the aluminum rivet 4 extending out of the upper surface of the cover plate 3;
and S25, sleeving the aluminum shell 2 by using the insulating sleeve 6.
The steps of the method 20 and the advantageous effects thereof have been described in more detail above in connection with the structure of the aluminum electrolytic capacitor 10, and will not be described again here.
By the aluminum electrolytic capacitor and the preparation method thereof, the capacitor can be used under the conditions of acid-base property or severe environment, and the service life is prolonged; the adhesive has good adhesion and flexibility to a substrate and an element, and the impact resistance of the capacitor is improved; the joint of the leading-out end can be isolated from contacting with acidic substances by coating the sealant, so that the corrosion resistance is improved.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (9)
1. The utility model provides an aluminum electrolytic capacitor, its characterized in that includes core, aluminum hull, apron, aluminium rivet and draws forth the inserted sheet, wherein, the core set up in the aluminum hull, the aluminum hull with the apron lock forms sealedly, aluminium riveted connection the core has and stretches out the extension of the upper surface of apron, it is in to draw forth the inserted sheet extension with aluminium riveted connection, aluminum electrolytic capacitor still includes the cover the sealant layer of apron upper surface, sealant layer highly be greater than or equal to the aluminium rivet the height of extension.
2. The aluminum electrolytic capacitor of claim 1, wherein the sealant layer has a height of 1 to 4 mm.
3. The aluminum electrolytic capacitor of claim 1 or 2, wherein the height of the sealant layer is 0.5 to 2mm greater than the height of the protruding portion of the aluminum rivet.
4. The aluminum electrolytic capacitor of claim 3 wherein the sealant layer has a height less than the thickness of the aluminum case.
5. The aluminum electrolytic capacitor of claim 4 further comprising an insulating sleeve disposed outside the aluminum case.
6. The aluminum electrolytic capacitor of claim 5 wherein the insulating sleeve comprises a beam waist structure.
7. The aluminum electrolytic capacitor of claim 1 or 2 wherein the sealant is a polyurethane adhesive.
8. The aluminum electrolytic capacitor of claim 1 or 2 wherein the aluminum case comprises a stiffener and an explosion-proof valve.
9. The aluminum electrolytic capacitor of claim 1 or 2, wherein the core is formed by winding a positive aluminum foil, an electrolytic paper and a negative aluminum foil in an overlapping manner, and the liquid dielectric medium is contained in the core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648306.2U CN210467604U (en) | 2019-09-29 | 2019-09-29 | Aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648306.2U CN210467604U (en) | 2019-09-29 | 2019-09-29 | Aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210467604U true CN210467604U (en) | 2020-05-05 |
Family
ID=70436127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921648306.2U Active CN210467604U (en) | 2019-09-29 | 2019-09-29 | Aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210467604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299482A (en) * | 2020-10-19 | 2021-08-24 | 阿里巴巴集团控股有限公司 | Electronic component packaging structure, electronic equipment, server and data center system |
-
2019
- 2019-09-29 CN CN201921648306.2U patent/CN210467604U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299482A (en) * | 2020-10-19 | 2021-08-24 | 阿里巴巴集团控股有限公司 | Electronic component packaging structure, electronic equipment, server and data center system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201222 Address after: No. 8, East Longshan 2nd Road, Longshan Industrial Zone, Doumen Town, Doumen District, Zhuhai City, Guangdong Province Patentee after: ZHUHAI GREE XINYUAN ELECTRONICS Co.,Ltd. Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Patentee after: Gree Xinyuan Electronics (Nanjing) Co.,Ltd. Address before: No.8, East Longshan 2nd Road, Longshan Industrial Zone, Doumen Town, Doumen District, Zhuhai City, Guangdong Province, 519100 Patentee before: ZHUHAI GREE XINYUAN ELECTRONICS Co.,Ltd. Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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| TR01 | Transfer of patent right |