CN215933397U - High-humidity-resistant laminated aluminum electrolytic capacitor - Google Patents
High-humidity-resistant laminated aluminum electrolytic capacitor Download PDFInfo
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- CN215933397U CN215933397U CN202122073854.0U CN202122073854U CN215933397U CN 215933397 U CN215933397 U CN 215933397U CN 202122073854 U CN202122073854 U CN 202122073854U CN 215933397 U CN215933397 U CN 215933397U
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Abstract
A high-humidity-resistant laminated aluminum electrolytic capacitor comprises a core, an anode guide pin, a cathode guide pin and a sealing assembly, wherein the core is arranged in the sealing assembly, and the anode guide pin and the cathode guide pin are respectively connected to the core and extend out of the sealing assembly; the sealing assembly comprises a metal shell and a metal seat plate; the metal shell is hermetically connected on the metal seat plate, two through holes are arranged on the metal seat plate, and a rubber pad with a hole in the middle is arranged in each through hole; the core is arranged on the metal seat plate, and an insulating gasket is arranged between the core and the metal seat plate; an anode guide pin and a cathode guide pin on the core respectively penetrate through the rubber pad and extend out of the metal seat plate. The invention adopts the metal sealing component to replace the original plastic packaging material, has better waterproofness and improves the humidity resistance of the capacitor.
Description
Technical Field
The invention relates to an aluminum electrolytic capacitor, in particular to a high-humidity-resistant laminated aluminum electrolytic capacitor and a manufacturing method thereof.
Background
Compared with the liquid aluminum electrolytic capacitor, the manufactured capacitor has the advantages of smaller volume, smaller Equivalent Series Resistance (ESR), wide temperature range, environmental protection and the like, meets the development trend of miniaturization and high frequency of electronic products, and meets the requirements of Surface Mount Technology (SMT).
However, the plastic package material of the conventional laminated solid aluminum electrolytic capacitor has water absorption property, and a gap may exist between the plastic package material and the lead-out terminal, so that under the condition of high temperature and high humidity, water vapor or air may penetrate through the gap between the plastic package material body and the joint to enter the core, resulting in deterioration of product characteristics.
The Chinese patent with the application number of CN202011070838.X 'manufacturing method for improving high-temperature and high-humidity tolerance of laminated aluminum electrolytic capacitor' discloses the following manufacturing method for improving high-temperature and high-humidity tolerance of laminated aluminum electrolytic capacitor: through the capacitor impregnation that will encapsulate the completion in silicone solution, make silicone get into inside the plastic envelope material, rethread high temperature solidification makes the space between silicone filling moulding material granule and the space between plastic envelope material and the leading-out terminal, and then can play the effect of gas-proof, water, has avoided steam or air to pass inside the space gets into the core, leads to product characteristic degradation.
However, the capacitor plastic package material in the patent also has water absorption property; and the potential risk of the performance parameters of the product are deteriorated due to the multiple impregnation and baking.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-humidity-resistant laminated aluminum electrolytic capacitor.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a high-humidity-resistant laminated aluminum electrolytic capacitor comprises a core, an anode guide pin, a cathode guide pin and a sealing assembly, wherein the core is arranged in the sealing assembly, and the anode guide pin and the cathode guide pin are respectively connected to the core and extend out of the sealing assembly;
the sealing assembly comprises a metal shell and a metal seat plate; the metal shell is hermetically connected to a metal seat plate, two through holes are formed in the metal seat plate, and a rubber pad with a hole in the middle is arranged in each through hole;
the core is arranged on the metal seat plate, and an insulating gasket is arranged between the core and the metal seat plate; and the anode guide pin and the cathode guide pin on the core respectively penetrate through the rubber pad and extend out of the metal seat plate.
In the above-mentioned high humidity resistant laminated aluminum electrolytic capacitor, preferably, a sealing insulating glue is filled between the anode guide pin and the rubber pad, and between the cathode guide pin and the rubber pad; the sealing insulating glue comprises one of silica gel or glass cement.
In the above-mentioned high humidity resistant laminated aluminum electrolytic capacitor, preferably, the sealing insulating paste is doped with silica or alumina particles.
In the above-mentioned high humidity resistant laminated aluminum electrolytic capacitor, preferably, the metal case is filled with nitrogen gas.
In the above-mentioned high humidity resistant laminated aluminum electrolytic capacitor, preferably, the core comprises a plurality of single sheets laminated together; the single piece comprises an anode end, a cathode end and a shielding glue line positioned between the anode end and the cathode end.
Above-mentioned resistant high wet stromatolite aluminum electrolytic capacitor, preferred, the metal base plate bottom is provided with the rubber bedplate, be provided with the recess on the rubber bedplate, after metal base plate and rubber bedplate are stretched out to positive pole guide pin and negative pole guide pin, the setting of buckling is in the recess.
The manufacturing method of the high-humidity-resistant laminated aluminum electrolytic capacitor comprises the following steps:
(1) stacking the anode ends of the single sheets together and the cathode ends of the single sheets together;
(2) electrically connecting the anode end of the single chip with the anode guide pin, and electrically connecting the cathode end with the cathode guide pin;
(3) respectively penetrating the anode guide pin and the cathode guide pin through holes of rubber pads on the metal base plate;
(4) arranging an insulating gasket between the core and the metal seat plate, and fixing the core on the metal seat plate;
(5) and the metal shell is nested on the metal seat plate, and the metal shell and the metal seat plate are sealed.
Preferably, in the manufacturing method of the high humidity resistant laminated aluminum electrolytic capacitor, the step (3) further includes filling a gap between the anode guide pin and the rubber pad with a sealing insulating glue after the anode guide pin and the cathode guide pin penetrate through the holes of the rubber pad.
In the method for manufacturing a high humidity resistant laminated aluminum electrolytic capacitor, preferably, the step (5) further includes filling nitrogen gas into the metal case when the metal case and the metal base plate are sealed.
Preferably, in the manufacturing method of the high humidity resistant laminated aluminum electrolytic capacitor, the step (5) further includes sleeving and fixing a rubber seat plate below the metal seat plate, and bending and fixing the anode guide pin and the cathode guide pin in the groove at the bottom of the rubber seat plate.
Compared with the prior art, the invention has the advantages that: the invention adopts the metal sealing component to replace the original plastic packaging material for packaging, and can better prevent water vapor from entering the product, thereby improving the moisture resistance of the laminated aluminum electrolytic capacitor.
Drawings
FIG. 1 is a sectional view of a high humidity resistant laminated aluminum electrolytic capacitor in example 1.
Fig. 2 is a schematic diagram of a single sheet structure in embodiment 1.
Fig. 3 a plan view of a metal seat plate in embodiment 1.
FIG. 4 is a plan view of the rubber shoe plate in example 1.
FIG. 5 is a sectional view of a high humidity resistant laminated aluminum electrolytic capacitor in example 2.
Description of the figures
1. A core; 11. a single sheet; 111. a porous aluminum foil; 112. aluminum oxide; 113. shielding the rubber wire; 114. a polymer layer; 115. a carbon layer; 116. a silver layer; 2. an anode guide pin; 3. a cathode guide pin; 4. a seal assembly; 41. a metal housing; 42. a metal seat plate; 5. a rubber pad; 6. silica gel; 7. a rubber seat plate; 8. an insulating spacer; 9. welding the blocks; 10. nitrogen gas.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Example 1
As shown in FIG. 1, the high humidity resistant laminated aluminum electrolytic capacitor in this embodiment comprises a core 1, an anode guide pin 2, a cathode guide pin 3 and a sealing component 4, wherein the core 1 is disposed in the sealing component 4, the anode guide pin 2 and the cathode guide pin 3 are respectively connected to the core 1 and extend out of the sealing component 4, and the whole sealing component 4 is filled with nitrogen 10. The nitrogen gas 10 is adopted to discharge the air in the capacitor, so that the oxidation of each component in the capacitor can be prevented, the service life of the capacitor is prolonged, and meanwhile, the nitrogen gas 10 filled in the sealing component 4 can be used for detecting whether the air tightness of the whole capacitor is good or not, and the screening of poor products is facilitated.
The sealing assembly 4 comprises a metal shell 41 and a metal seat plate 42, wherein the metal shell 41 is buckled upside down and is connected to the metal seat plate 42 in a sealing mode, two through holes are formed in the metal seat plate 42, and a rubber pad 5 with a middle hole is arranged in the two through holes. The bottom of the metal seat plate 42 is connected with a rubber seat plate 7 with the same size as the metal seat plate 42, and the rubber seat plate 7 is provided with two grooves. Adopt rubber pad 5 and rubber bedplate 7 can prevent that the guide pin from contacting with metal bedplate 42, avoid the condition that the short circuit appears in guide pin and metal bedplate 42 switch on.
The core 1 is integrally mounted on a metal base plate 42, and an insulating spacer 8 is provided between the core 1 and the metal base plate 42. The insulating gasket 8 separates the core 1 from the metal seat plate 42, and prevents the core 1 from being electrically connected with the metal seat plate 42.
As shown in fig. 2, the core 1 includes a plurality of single sheets 11 stacked together, each single sheet 11 includes an anode end, a cathode end and a shielding glue line 113 located between the anode end and the cathode end, the whole single sheet 11 uses a porous aluminum foil 111 as a base material, a layer of aluminum oxide 112 is formed on the surface of the porous aluminum foil 111, and the cathode end of the single sheet 11 sequentially includes a high polymer layer 114, a carbon layer 115 and a silver layer 116 from inside to outside.
As shown in fig. 3 and 4, the anode end of the anode guide pin 2 connected to the single piece 11 passes through the rubber pad 5 and extends out of the metal seat plate 42 and the rubber seat plate 7, and is embedded into the groove of the rubber seat plate 7 after being bent, the cathode end of the cathode guide pin 3 connected to the single piece 11 passes through the rubber pad 5 and extends out of the metal seat plate 42 and the rubber seat plate 7, and is embedded into the groove of the rubber seat plate 7 after being bent, and silica gel 6 is filled between the cathode guide pin 3 and the rubber pad 5, and silica particles are further doped in the silica gel 6. The silica gel 6 doped with the silicon dioxide particles is adopted to fill the gap between the guide pin and the rubber pad 5, so that the air tightness of the capacitor can be well enhanced, and water vapor and air are prevented from entering the capacitor, so that various parameter performances of the capacitor can be kept stable.
The manufacturing method of the high-humidity-resistant laminated aluminum electrolytic capacitor in the embodiment comprises the following steps:
(1) the anode ends of all the single sheets 11 are stacked together and the cathode ends are stacked together.
(2) The anode end of the single sheet 11 is welded with the anode guide pin 2 by using a welding block 9, and the cathode end is bonded with the cathode guide pin by using conductive metal slurry.
(3) The anode guide pin 2 and the cathode guide pin 3 are respectively passed through the holes of the rubber pads 5 on the metal base plate 42, and the silica gel 6 doped with silica particles is adopted to fill the gap between the guide pins and the rubber pads 5.
(4) An insulating spacer 8 is provided between the core 1 and the metal seat plate 42, and the core 1 is fixed to the metal seat plate 42.
(5) The metal case 41 is fitted on the metal base plate 42, nitrogen gas 10 is filled into the metal case 41, and then the metal case 41 and the metal base plate 42 are sealed by resistance welding. After the sealing is finished, the rubber seat plate 7 is sleeved and fixed below the metal seat plate 42, and then the anode guide pin 2 and the cathode guide pin 3 are bent and fixed in the groove at the bottom of the rubber seat plate 7.
Example 2
As shown in fig. 5, the difference between the high humidity resistant laminated aluminum electrolytic capacitor of the present embodiment and embodiment 1 is that the rubber seat plate 7 is not provided with a groove, the anode lead 2 and the cathode lead 3 extend beyond 5mm after passing through the rubber pad 5 of the metal seat plate 42 and the rubber seat plate 7, and thus the extended anode lead 2 and cathode lead 3 can be electrically connected to the circuit board.
The manufacturing method of the high humidity resistant laminated aluminum electrolytic capacitor in the present embodiment is different from embodiment 1 in that the step (5) is changed to: the metal case 41 is fitted on the metal base plate 42, nitrogen gas 10 is filled into the metal case 41, and then the metal case 41 and the metal base plate 42 are sealed by resistance welding. After the sealing is finished, the rubber seat plate 7 is sleeved and fixed below the metal seat plate 42, and then the anode guide pin 2 and the cathode guide pin 3 are sheared, so that the anode guide pin 2 and the cathode guide pin 3 extend out of the lower bottom surface of the rubber seat plate 7 by more than 5 mm.
Claims (6)
1. A high-humidity-resistant laminated aluminum electrolytic capacitor is characterized by comprising a core, an anode guide pin, a cathode guide pin and a sealing assembly, wherein the core is arranged in the sealing assembly, and the anode guide pin and the cathode guide pin are respectively connected to the core and extend out of the sealing assembly;
the sealing assembly comprises a metal shell and a metal seat plate; the metal shell is hermetically connected to a metal seat plate, two through holes are formed in the metal seat plate, and a rubber pad with a hole in the middle is arranged in each through hole;
the core is arranged on the metal seat plate, and an insulating gasket is arranged between the core and the metal seat plate; and the anode guide pin and the cathode guide pin on the core respectively penetrate through the rubber pad and extend out of the metal seat plate.
2. The laminated aluminum electrolytic capacitor with high humidity resistance of claim 1, wherein a sealing insulating glue is filled between the anode guide pin and the rubber pad, and a sealing insulating glue is filled between the cathode guide pin and the rubber pad; the sealing insulating glue comprises one of silica gel or glass cement.
3. The laminated aluminum electrolytic capacitor with high humidity resistance of claim 2, wherein the sealing insulating paste is doped with silicon dioxide or aluminum oxide particles.
4. The laminated aluminum electrolytic capacitor with high humidity resistance of claim 1, wherein the metal case is filled with nitrogen gas.
5. The laminated high humidity resistant aluminum electrolytic capacitor according to claim 1 wherein the core comprises a plurality of individual sheets laminated together; the single piece comprises an anode end, a cathode end and a shielding glue line positioned between the anode end and the cathode end.
6. The laminated aluminum electrolytic capacitor with high humidity resistance as claimed in claim 1, wherein a rubber seat plate is disposed at the bottom of the metal seat plate, a groove is disposed on the rubber seat plate, and the anode guide pin and the cathode guide pin are bent and disposed in the groove after extending out of the metal seat plate and the rubber seat plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122073854.0U CN215933397U (en) | 2021-08-31 | 2021-08-31 | High-humidity-resistant laminated aluminum electrolytic capacitor |
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| CN202122073854.0U CN215933397U (en) | 2021-08-31 | 2021-08-31 | High-humidity-resistant laminated aluminum electrolytic capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241187A1 (en) * | 2022-06-16 | 2023-12-21 | 湖南艾华集团股份有限公司 | Laminated aluminum electrolytic capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241187A1 (en) * | 2022-06-16 | 2023-12-21 | 湖南艾华集团股份有限公司 | Laminated aluminum electrolytic capacitor |
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