CN201838461U - High-tension winding aluminium solid capacitor - Google Patents
High-tension winding aluminium solid capacitor Download PDFInfo
- Publication number
- CN201838461U CN201838461U CN2010205056532U CN201020505653U CN201838461U CN 201838461 U CN201838461 U CN 201838461U CN 2010205056532 U CN2010205056532 U CN 2010205056532U CN 201020505653 U CN201020505653 U CN 201020505653U CN 201838461 U CN201838461 U CN 201838461U
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- Prior art keywords
- anode strip
- aluminium
- convoluted
- capacitor
- high voltage
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Abstract
The utility model relates to a high-tension winding aluminium solid capacitor which mainly comprises a capacitor core that is formed by winding an anode plate, a cathode plate and at least one piece of isolating paper clamped between the anode plate and the cathode plate; the interior of the anode plate has an aluminium foil structure and an AL2O3 layer is generated at the exterior; the capacitor core is soaked in Silane Coupling Agents, and the surface of the AL2O3 is coated with a Silane layer that is adsorbed on the anode plate to form a protective layer of the surface, therefore, the short circuit phenomenon of the solid capacitor as the leaked current breaks down the anode plate can be avoided, and further the thermal resistance and voltage resistance effects of the solid capacitor can be improved.
Description
Technical field
The utility model relates to a kind of convoluted solid capacitor, refers to a kind of proof voltage convoluted aluminium solid capacitor of high voltage between arriving 50 volts to 65 volts especially.
Background technology
Traditional aluminium electrolytic capacitor, the electrolyte that uses is liquid, so it is poor to have temperature characterisitic, and the situation that leakage current and dielectric loss are big, the electric current that between anode and negative electrode, is flow through, or the temperature between the two poles of the earth is when exceeding specification, and its security feature is destroyed, makes that its capacity reduces, impedance increases.And cause the damage of electrolytic capacitor, and the possibility that involves electronic circuit is arranged.
In order to address the above problem, the researcher of relevant industry has proposed to use has satisfactory electrical conductivity, the electroconductive polymer that more easily forms solid electrolyte is as the method for solid electrolyte, and existing solid-state capacitor kind mainly contains two kinds of stack-up type solid-state capacitor and convoluted solid-state capacitors.
This stack-up type solid-state capacitor please refer to People's Republic of China's patent publication No. several CN101176172A number " long-pending folded type Solid electrolytic capacitor And Manufacturing approach ", principal character is to possess a plurality of anode bodies with anode portion, reach the capacitor assembly that on this anode body surface, has the negative pole part that forms dielectric oxide scale film and cathode layer in regular turn, described these capacitor assemblies are with the lamination state configuration simultaneously, and on the anode encapsulating face of the set anode encapsulation of anode terminal, welding is fixedly in the solid electrolytic capacitor of the structure of aforesaid anode portion, a plurality of above-mentioned anode encapsulation are set, and when this anode encapsulation disposes in the mode that is parallel to each other, the anode encapsulation person that is all of adjacency connects with connecting portion separately, is a kind of stack-up type solid-state capacitor.
And this convoluted solid-state capacitor, its capacitor main body partly by one through overetched conductive metal foil as anode film, anode film surface and process anodized, this anode film and draw lead and be anode, a metal forming is made as cathodic coating, and this cathodic coating is also drawn lead and become negative electrode; Above-mentioned anode film, cathodic coating be wound into cylindric after, be to impregnated in the solution of polymer positive-temperature-coefficient material (PPTC), give thermal polymerization after, make between anode film and the cathodic coating to be formed with dielectric substrate, be a kind of convoluted solid-state capacitor.
By above-mentioned solid-state capacitor as can be known; this stack-up type and convoluted solid-state capacitor can both overcome the disappearance of liquid aluminium electrolytic capacitor; yet; after reality use and test; find that above-mentioned technology still has many shortcomings; because stack-up type and convoluted capacitor all adopt solid electrolyte to replace liquid electrolyte; to eliminate liquid temperature characterisitic difference or the long-time instability of using; but under the situation of high capacity or high temperature; this solid-state capacitor will produce bigger leakage current; if do not strengthen the protection effect of anode tap; this solid-state capacitor will cause the phenomenon of short circuit because of excessive leakage current, learn according to experimental data, and the ceiling voltage that existing solid-state capacitor can bear is less than 50 volts; how to improve the born voltage of solid-state capacitor, this is the technical problem point that the utility model desire is improved.
Moreover, because existing anode foils and Cathode Foil all use cutter to cut, blade directly contacts with aluminium foil when cutting, can be for aluminium foil generation extruding and bending to a certain degree, system can produce many burrs and slight crack in cutting edge, and in the course of processing, this burr and slight crack come off easily in the inner space of capacitor, and then the leakage current of increase capacitor, shortened the useful life of capacitor.
Therefore, the utility model problem of wanting to get rid of or alleviating background technology at least and met with.
Summary of the invention
The technical problem that the utility model institute desire solves is to provide a kind of high voltage convoluted aluminium solid capacitor at the above-mentioned disappearance of prior art existence.
For achieving the above object, the technical solution adopted in the utility model is:
The convoluted aluminium solid capacitor of a kind of high voltage is characterized in that, includes:
One is held body;
A capacitance core, this capacitance core is installed in this Rong Tizhong, this capacitance core is located in barrier paper between this anode strip and this cathode sheets by an anode strip, cathode sheets and at least one and is reeled and form, the inside of this anode strip is that aluminium foil structure and outside the generation have layer of oxide layer, this anode strip to be coated with one deck in the oxide layer surface to be used for preventing that leakage current from puncturing anode strip and producing the protective layer of short circuit phenomenon; And
A capping, this capping are installed in this appearance body, make this capacitance core be sealed in this appearance body.
Wherein: this protective layer is one deck silane.
Wherein: this oxide layer is an aluminium oxide.
Wherein: this protective layer is that anode strip soaks silane coupling agent and one deck silane of coating in alumina surface.
Wherein: this anode strip and this cathode sheets are all cut by the laser cutting mode and into strips, and the burr at the face that the cuts edge of control anode strip and this cathode sheets is less than 10 microns.
Wherein: this cathode sheets is the aluminium foil structure.
Wherein: this anode strip and this cathode sheets be all to being externally connected with a connecting line, and this capping offers two perforation and wears with the connecting line that this anode strip and this cathode sheets are provided and stretch out.
Wherein: the inside of this appearance body is filled with solid electrolyte, and this solid electrolyte absorption is fixed on the barrier paper of this capacitance core.
Wherein: the inside of this appearance body is filled with conducting polymer liquid, and this conducting polymer liquid forms solid electrolyte via drying, and this solid electrolyte absorption is fixed on the barrier paper of this capacitance core.
Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be:
1. the anode strip of this capacitance core inside is the aluminium foil structure, and outside the generation has aluminium oxide (AL
2O
3), this capacitance core is soaked in silane coupling agent (Silane Coupling Agents) and in aluminium oxide (AL again
2O
3) surface coated one deck silane (Silane), this silane (Silane) is adsorbed in the protective layer that anode strip forms the surface, prevents that leakage current from puncturing anode strip and producing the short circuit phenomenon of solid capacitor, can improve the heat-resisting of solid capacitor and proof voltage effect.
2. anode strip and cathode sheets system uses the laser cutting mode to cut, can control anode strip and cathode sheets in the burr at edge less than 10 microns (μ m), and then can in winding process, not produce the situation that burr comes off, can reduce the leakage current of solid capacitor, to improve the useful life of solid capacitor.
3. be folded with barrier paper between this anode strip and the cathode sheets, this barrier paper is mixed by polyster fibre (Polyester Fiber), aramid fiber (Aramid Fiber) and cellulose fibre (Cellulose Fiber), ratio combination by composite material, can avoid barrier paper to be subjected to high temperature and the long-time influence of using, and the forfeiture function of anode strip and cathode sheets at interval so keeps the isolated effect of barrier paper.
Description of drawings
Fig. 1 is the stereo appearance figure of the convoluted aluminium solid capacitor of the utility model high voltage;
Fig. 2 is the three-dimensional exploded view of the convoluted aluminium solid capacitor of the utility model high voltage;
Fig. 3 is the side sectional view of the convoluted aluminium solid capacitor of the utility model high voltage;
Fig. 4 is the partial enlarged drawing of the utility model Fig. 3 in anode strip;
Fig. 5 is the manufacturing flow chart of the convoluted aluminium solid capacitor of the utility model high voltage;
Fig. 6 is the silane reaction chemical formula figure of the convoluted aluminium solid capacitor of the utility model high voltage.
Description of reference numerals: 1-solid capacitor; 10-holds body; The 11-accommodation space; The 12-blind end; The 13-openend; The 20-capacitance core; The 21-anode strip; The 21a-aluminium foil; The 21b-oxide layer; The 21c-protective layer; The 22-cathode sheets; The 23-barrier paper; The 24-connecting line; The 25-connecting line; The 30-capping; The 31-perforation; The 32-perforation; The 40-solid electrolyte.
Embodiment
The technology that relevant the utility model adopted, means and effect thereof, lift a preferred embodiment now and cooperate graphic detailed description as after, this only for the usefulness of explanation, is not subjected to the restriction of this kind structure in patent application.
Referring to figs. 1 through Fig. 4, be the convoluted aluminium solid capacitor of the utility model high voltage stereo appearance figure, three-dimensional exploded view, side sectional view and partial enlarged drawing.Solid capacitor 1 of the present utility model includes one and holds body 10, a capacitance core 20 and a capping 30, this appearance body 10 offers an accommodation space 11, this holds body 10 and forms a blind end 12 in an end of accommodation space 11, this accommodation space 11 is formed with an openend 13 with respect to blind end 12, blind end 12 bottom surfaces of this appearance body 10 offer the explosion-proof line (figure does not indicate) of K type shape, shown in present embodiment, this appearance body 10 is made for the metallic aluminium material of tubular.
This capacitance core 20 is installed in the accommodation space 11 of this appearance body 10, capacitance core 20 is located in barrier paper 23 between anode strip 21 and the cathode sheets 22 by an anode strip 21, cathode sheets 22 and at least one and is reeled and form, this anode strip 21 and cathode sheets 22 are all to being externally connected with a connecting line 24,25, those connecting lines 24,25 convexedly stretch in the openend 13 that holds body 10, the inside of this anode strip 21 is aluminium foil 21a structure and outside generates that layer of oxide layer 21b, oxide layer 21b are arranged is a kind of aluminium oxide (AL
2O
3), this anode strip 21 is coated with layer protective layer 21c in oxide layer 21b surface, and protective layer 21c is that anode strip 21 soaks silane coupling agents (Silane Coupling Agents) and in aluminium oxide (AL
2O
3) surface coated one deck silane (Silane).This cathode sheets 22 is a kind of aluminium foil structure.This barrier paper 23 is mixed by polyster fibre (Polyester Fiber), aramid fiber (Aramid Fiber) and cellulose fibre (Cellulose Fiber), so keeps the isolated effect of barrier paper 23.
This capping 30 is installed in the openend 13 of this appearance body 10, makes capacitance core 20 be sealed in this appearance body 10, and this capping 30 offers two perforation 31,32 and wears with the connecting line 24,25 that this anode strip 21 and this cathode sheets 22 are provided and stretch out.
With reference to Fig. 5, the process steps of this solid capacitor 1 is as follows simultaneously:
Step 1: utilize laser cutting mode antianode sheet 21 and cathode sheets 22 to cut, and the burr that cuts the edge of control anode strip 21 and cathode sheets 22 is less than 10 microns (μ m), this cuts the edge only slight avalanche phenomenon, and the avalanche situation is all towards same direction (due to laser penetration), so can in the process of reeling, not produce the situation that burr comes off, to improve the stability of solid capacitor 1.
Step 2: folder is established barrier paper 23 and is reeled and form capacitance core 20 between anode strip 21 and the cathode sheets 22, and this anode strip 21 and cathode sheets 22 are all to being externally connected with a connecting line 24,25.
Step 3: capacitance core 20 is soaked in silane coupling agent (Silane Coupling Agents) and in aluminium oxide (AL
2O
3) surface is coated with one deck silane (Silane); this silane coupling agent (Silane Coupling Agents) only forms with oxide layer 21b and links; clean the silane (Silane) that will residue in cathode sheets 22 and barrier paper 23 so can rely on; the protective layer 21c that this silane (Silane) is constituted can form film in anode strip 21 surfaces; allow anode strip 21 can bear higher temperature; can bear the working temperature that high voltage brings, the proof voltage that makes solid capacitor 1 up to 50 volts between 65 volts.
Step 4: capacitance core 20 is installed in and holds in the body 10, and the inside of this appearance body 10 is filled with an amount of conducting polymer liquid (PEDT; 3,4-ethylenedioxythiophene), this conducting polymer liquid (PEDT; 3,4-ethylenedioxythiophene) form solid electrolyte 40 via drying, these solid electrolyte 40 absorption are fixed on the barrier paper 23 of this capacitance core 20.
Step 5: capping 30 is installed in the openend 13 that holds body 10, and the connecting line 24,25 of this capacitance core 20 is passed by the perforation 31,32 of capping 30, holds the sealing effectiveness of 30 pairs of capacitance cores 20 of openend 13 formation cappings of body 10 again via extruding.
With reference to Fig. 6, further specify the coating process of this silane (Silane) more simultaneously, the basic molecular formula of this silane (Silane) is Si (OR)
3, after silane (Silane) adds an amount of water, can make silane (Silane) produce hydrolysis, promptly form silane coupling agent (Silane Coupling Agents), this reaction equation is as follows:
Si(OR)
3+3H
2O＝Si(OH)
3+3ROH
The main hydrolysate of this silane coupling agent (Silane Coupling Agents) is silicon hydroxyl (SiOH), capacitance core 20 is soaked in the silane coupling agent (Silane Coupling Agents), can carry out condensation reaction in the surface hydroxyl (OH) of oxide layer 21b by silicon hydroxyl (SiOH) and anode strip 21, make silane (Silane) directly be coated on anode strip 21 surfaces, carry out dehydration at last, allow silane (Silane) further condense and hydrone (H
2O) discharge, this reaction equation is as follows:
SiOH+(Al
2O
3)OH＝(Si-O-Al
2O
3)+H
2O
When anode strip 21 surfaces of capacitance core 20 are coated with protective layer 21c; this silane (Silane) can improve the high-temperature resistant result and the high voltage withstanding effect of anode strip 21; make solid capacitor 1 can bear 105 degree high temperature and 65 volts of voltages; so improve the performance of solid capacitor 1; as shown in Table 1; for the utility model carries out the 2000Hrs measured data with 105 ± 3 ℃; its test pack contains capacitance Cap. (μ F); hold the rate Δ % that declines; angle of loss Tan δ (%); leakage current LC (μ A) and equivalent series resistance ESR (m Ω); learn by data; this capacitance average out to 46.83 μ F; and leakage current is on average below 0.8 μ A, can prevent that solid capacitor 1 from having leakage current excessive and situation short circuit takes place.
Table one
Can summarize with regard to the above and the utlity model has following advantage:
1. the convoluted aluminium solid capacitor of the utility model high voltage, wherein the anode strip of this capacitance core inside is the aluminium foil structure, the outside generation has aluminium oxide (AL
2O
3), this capacitance core is soaked in silane coupling agent (Silane Coupling Agents) and in aluminium oxide (AL again
2O
3) surface coated one deck silane (Silane), this silane (Silane) is adsorbed in the protective layer that anode strip forms the surface, prevents that leakage current from puncturing anode strip and producing the short circuit phenomenon of solid capacitor, can improve the heat-resisting of solid capacitor and proof voltage effect.
2. the convoluted aluminium solid capacitor of the utility model high voltage, wherein anode strip and cathode sheets system uses the laser cutting mode to cut, can control anode strip and cathode sheets in the burr at edge less than 10 microns (μ m), and then can in winding process, not produce the situation that burr comes off, can reduce the leakage current of solid capacitor, to improve the useful life of solid capacitor.
3. the convoluted aluminium solid capacitor of the utility model high voltage, wherein be folded with barrier paper between this anode strip and the cathode sheets, this barrier paper is mixed by polyster fibre (Polyester Fiber), aramid fiber (AramidFiber) and cellulose fibre (Cellulose Fiber), ratio combination by composite material, can avoid barrier paper to be subjected to high temperature and the long-time influence of using, and the forfeiture function of anode strip and cathode sheets at interval so keeps the isolated effect of barrier paper.
More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection range of the present utility model.
Claims (9)
1. the convoluted aluminium solid capacitor of high voltage is characterized in that, includes:
One is held body;
A capacitance core, this capacitance core is installed in this Rong Tizhong, this capacitance core is located in barrier paper between this anode strip and this cathode sheets by an anode strip, cathode sheets and at least one and is reeled and form, the inside of this anode strip is that aluminium foil structure and outside the generation have layer of oxide layer, this anode strip to be coated with one deck in the oxide layer surface to be used for preventing that leakage current from puncturing anode strip and producing the protective layer of short circuit phenomenon; And
A capping, this capping are installed in this appearance body, make this capacitance core be sealed in this appearance body.
2. the convoluted aluminium solid capacitor of high voltage according to claim 1 is characterized in that: this protective layer is one deck silane.
3. the convoluted aluminium solid capacitor of high voltage according to claim 2 is characterized in that: this oxide layer is an aluminium oxide.
4. the convoluted aluminium solid capacitor of high voltage according to claim 3 is characterized in that: this protective layer is that anode strip soaks silane coupling agent and one deck silane of coating in alumina surface.
5. the convoluted aluminium solid capacitor of high voltage according to claim 1 is characterized in that: this anode strip and this cathode sheets are all cut by the laser cutting mode and into strips, and the burr at the face that the cuts edge of control anode strip and this cathode sheets is less than 10 microns.
6. the convoluted aluminium solid capacitor of high voltage according to claim 1 is characterized in that: this cathode sheets is the aluminium foil structure.
7. the convoluted aluminium solid capacitor of high voltage according to claim 1 is characterized in that: this anode strip and this cathode sheets be all to being externally connected with a connecting line, and this capping offers two perforation and wears with the connecting line that this anode strip and this cathode sheets are provided and stretch out.
8. the convoluted aluminium solid capacitor of high voltage according to claim 1, it is characterized in that: the inside of this appearance body is filled with solid electrolyte, and this solid electrolyte absorption is fixed on the barrier paper of this capacitance core.
9. the convoluted aluminium solid capacitor of high voltage according to claim 1, it is characterized in that: the inside of this appearance body is filled with conducting polymer liquid, this conducting polymer liquid forms solid electrolyte via drying, and this solid electrolyte absorption is fixed on the barrier paper of this capacitance core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205056532U CN201838461U (en) | 2010-08-26 | 2010-08-26 | High-tension winding aluminium solid capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205056532U CN201838461U (en) | 2010-08-26 | 2010-08-26 | High-tension winding aluminium solid capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201838461U true CN201838461U (en) | 2011-05-18 |
Family
ID=44008565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205056532U Expired - Lifetime CN201838461U (en) | 2010-08-26 | 2010-08-26 | High-tension winding aluminium solid capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201838461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022755A (en) * | 2016-11-01 | 2018-05-11 | 钰邦电子（无锡）有限公司 | The capacitor packaging structure and its wound-type module of negative conductive paillon foil is not required |
| CN110517893A (en) * | 2019-08-14 | 2019-11-29 | 湖南艾华集团股份有限公司 | A kind of high voltage bearing solid-state aluminum electrolytic capacitor and preparation method thereof |
-
2010
- 2010-08-26 CN CN2010205056532U patent/CN201838461U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022755A (en) * | 2016-11-01 | 2018-05-11 | 钰邦电子（无锡）有限公司 | The capacitor packaging structure and its wound-type module of negative conductive paillon foil is not required |
| CN108022755B (en) * | 2016-11-01 | 2020-08-11 | 钰邦电子（无锡）有限公司 | Capacitor packaging structure without negative conductive foil and winding type assembly thereof |
| CN110517893A (en) * | 2019-08-14 | 2019-11-29 | 湖南艾华集团股份有限公司 | A kind of high voltage bearing solid-state aluminum electrolytic capacitor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |