CN103137331B - Solid state electrolytic capacitor core and capacitor - Google Patents
Solid state electrolytic capacitor core and capacitor Download PDFInfo
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- CN103137331B CN103137331B CN201110378263.2A CN201110378263A CN103137331B CN 103137331 B CN103137331 B CN 103137331B CN 201110378263 A CN201110378263 A CN 201110378263A CN 103137331 B CN103137331 B CN 103137331B
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- anode foils
- cathode foil
- separator
- capacitor core
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Abstract
The present invention relates to a kind of solid state electrolytic capacitor core and capacitor, this solid state electrolytic capacitor core includes a mandrel body and connects the positive and negative pin of this mandrel body, wherein, this mandrel body forms with winding after an anode foils, a Cathode Foil and multiple separator alternately insulation arrangement, and the length of this anode foils is greater than the length of this Cathode Foil; This solid state electrolytic capacitor core is arranged at a shell and positive and negative pin is stretched out and pass shell, can form a capacitor, the present invention utilizes anode foils length to be greater than Cathode Foil length, effectively can improve the effective capacitance amount of electrochemical capacitor.
Description
Technical field
The present invention relates to a kind of solid state electrolytic capacitor core and capacitor, espespecially a kind of solid state electrolytic capacitor core and capacitor improving capacitance.
Background technology
The structure of general solid electrolytic capacitor can include the capacitor core that a shell, is coated on enclosure and the metallic pin extended by capacitor core.Please refer to shown in Figure 11, it is the layer structure schematic diagram before the non-winding shaping of a capacitor core, include anode foils 71, Cathode Foil 72 and the several layers of separator be arranged alternately 73,74, aforesaid anode paper tinsel 71 and Cathode Foil 72 separate by this separator 73,74, avoid anode foils 71 and Cathode Foil 72 when reeling contact with each other and produce short circuit.Separately respectively be connected a lead foot in anode foils 71 with in Cathode Foil 72, using as the positive pin 75 of electric capacity and negative pin 76.
With Figure 11 embodiment, if order after reeling according to capacitor core from inside to outside, its layered arrangement order is separator 73, anode foils 71, separator 74 and Cathode Foil 72, and coiling direction is as shown in arrow A, wherein, the length of Cathode Foil 72 is slightly longer than this anode foils 71, except aforesaid arrangement mode, also can change the making capacitor core that puts in order with Figure 11.
Please refer to shown in Figure 12, the another kind of layered arrangement order of capacitor core is anode foils 71, separator 73, Cathode Foil 72 and separator 74.Anode foils 71 changes into and is arranged in inner side, and Cathode Foil 72 relatively outside and its length is still the length being greater than anode foils 71.Because capacitor must make according to certain specification, the relative distance etc. of the size after capacitor core winding shaping, positive and negative pin 75,76, all has fixing specification to observe, and therefore, to the capacitance of varying capacitors, will be not easy very much.
Summary of the invention
In view of the capacitance of existing solid electrolytic capacitor not easily promotes, an object of the present invention is under the prerequisite not changing existing electric capacity material, a kind of solid state electrolytic capacitor core of effective raising capacitance is provided.
For reaching aforementioned object, solid state electrolytic capacitor core of the present invention includes:
One mandrel body, form with winding after an anode foils, a Cathode Foil and multiple separator alternately insulation arrangement, the length of this anode foils is greater than the length of this Cathode Foil;
One positive pin and a negative pin, is electrically connected anode foils and the Cathode Foil of this capacitor core respectively;
Wherein, the computing formula of capacitance is
ca=L1 × W × P, Ce=L2 × W × N, and Ce is at least greater than Ca 30 times;
L1: anode foils length;
L2: Cathode Foil length;
W: anode foils, Cathode Foil width;
P: anode foils unit capacity;
N: Cathode Foil unit capacity.
According to the computing formula of effective capacitance C
display, when Cathode Foil capacitance density is many higher than anode foils capacitance density, effective capacitance C equals Ca by rough, if improve anode foils length, can directly promote Ca and effective capacitance C be strengthened.
This mandrel body center inner side is the first separator, sequentially alternately to insulate arrangement with Cathode Foil, the second separator and anode foils from inside to outside.
This mandrel body center inner side is this Cathode Foil, sequentially alternately to insulate arrangement with the first separator, anode foils and the second separator from inside to outside.
This first separator and the second separator are to be formed after same separator bending.
This mandrel body is synchronously outwards synchronously reeled by center with the four-layer structure that this anode foils, Cathode Foil and first, second separator are formed and formed.
The inside region of this mandrel body comprises the four-layer structure that this anode foils, Cathode Foil and first, second separator are formed; The exterior lateral area of this mandrel body comprises the two-layer structure that anode foils and the second separator are formed.
This is positioned at outermost anode foils latter end and arranges an adhesive tape.
This latter end being positioned at outermost second separator arranges an adhesive tape.
Another object of the present invention is to provide a kind of solid electrolytic capacitor improving capacitance, it is characterized in that, this solid electrolytic capacitor includes:
One shell;
One capacitor core, is arranged at this enclosure, and this capacitor core forms with winding after an anode foils, a Cathode Foil and multiple separator alternately insulation arrangement, and the length of this anode foils is greater than the length of this Cathode Foil, and wherein this anode foils and Cathode Foil respectively include:
One metal forming;
One oxide layer, is formed in the surface of this metal forming; And
One electroconductive polymer layer, is formed in the surface of this oxide layer;
One positive pin and a negative pin, is electrically connected the anode foils of this capacitor core and Cathode Foil respectively and runs through shell and stretch out;
Wherein, the computing formula of capacitance is
ca=L1 × W × P, Ce=L2 × W × N, and Ce is at least greater than Ca 30 times;
L1: anode foils length;
L2: Cathode Foil length;
W: anode foils, Cathode Foil width;
P: anode foils unit capacity;
N: Cathode Foil unit capacity.
Accompanying drawing explanation
Fig. 1: the stereogram of first embodiment of the invention.
Fig. 2: the stereogram of second embodiment of the invention.
Fig. 3: the layer structure schematic diagram before the non-winding shaping of capacitor core first embodiment in capacitor of the present invention.
Fig. 4: the layer structure schematic diagram before the non-winding shaping of capacitor core second embodiment in capacitor of the present invention.
Fig. 5: the layer structure schematic diagram before the non-winding shaping of the capacitor core in capacitor of the present invention 3rd embodiment.
Fig. 6: the layer structure schematic diagram before the non-winding shaping of the capacitor core in capacitor of the present invention 4th embodiment.
Fig. 7: the layer structure schematic diagram before the non-winding shaping of the capacitor core in capacitor of the present invention 5th embodiment.
Fig. 8: the plan view from above after the capacitor core winding of earlier figures 3.
Fig. 9: the plan view from above after the capacitor core winding of earlier figures 7.
Figure 10: electronics fuse of the present invention completes the generalized section of dip operation.
Figure 11: the layer structure schematic diagram before the non-winding shaping of existing capacitor core.
Figure 12: the layer structure schematic diagram before the non-winding shaping of another capacitor core existing.
Embodiment
Below coordinating accompanying drawing and the preferred embodiments of the present invention, setting forth the technological means that the present invention takes for reaching predetermined goal of the invention further.
The computing formula of the effective capacitance C of electrolytic capacitor can be expressed as:
wherein Ca is defined as L1 × W × P, Ce and is defined as L2 × W × N, and the meaning representated by each parameter is as follows:
L1: anode foils length
L2: Cathode Foil length
W: positive and negative pole paper tinsel width
P: anode foils unit capacity
N: Cathode Foil unit capacity
According to aforementioned capacitance calculation formula, when Cathode Foil unit capacity N is much larger relative to other parameter, then Ce can become very large, when Ce be greater than Ca have more than 30 times time, after Ca, Ce being inserted in capacitance calculation formula, effective capacitance C equals Ca (C ≈ Ca) by rough, and Ca has directly related with anode foils length L1.If anode foils length L1 can be improved, effective capacitance C can be improved.Below one group of data practical illustration C ≈ Ca is namely utilized:
In addition, then according to following form data, can illustrate when increasing anode foils length L1, and the capacity that the larger person of Cathode Foil unit capacity N can increase is more obvious:
With the N=5000 in above table and anode foils length L1=140mm time, capacitance C is about 726, and when anode foils length L1 is increased to 170mm, capacitance C is about 876, about improves 21%.
And work as N=400, during anode foils length L1=140mm, capacitance C is 637; When anode foils length is increased to 170mm, capacitance C is 726, and also increasing has 14%.
Therefore namely the present invention utilizes aforementioned conclusion, deliberately make the length of anode foils be greater than the length of Cathode Foil, can effective capacitance C be improved.Please refer to shown in Fig. 1 and Fig. 2, the present invention is a kind of solid electrolyte capacitor, include the shell 20 of a capacitor core 10, this capacitor core 10 coated, and connect positive pin 31 and a negative pin 32 of capacitor core 10, this positive and negative pin 31,32 runs through shell 20 and stretches out.The kind of this solid electrolyte capacitor is not limit, such as, Figure 1 shows that the electrochemical capacitor utilizing the coated capacitor core 10 of plastics shell 20 to form, Fig. 2 is then the electrochemical capacitor formed with the coated capacitor core 10 of aluminium shell 20, this shell 20 comprises an aluminium casing and a closely sealed insulating block, this kind of capacitance structure is located at by capacitor core 10 on an insulating block (as plastic material), just make capacitor core 10, negative pin 31, 32 run through this insulating block, again with aluminium casing in the lump coated this capacitor core 10 and insulating block, formalize via to aluminium casing pressurization, this aluminium casing can be made to be out of shape indent and to produce inside packing effect, aluminium casing and insulating block are combined closely, reach object capacitor core 10 being encapsulated in shell 20 inside.
Refer to shown in Fig. 3 ~ 7, before the non-winding shaping of this capacitor core 10, the layer structure schematic diagram of different embodiment, the capacitor core of each embodiment includes anode foils 11, Cathode Foil 12 and the several layers of separator be arranged alternately 13,14, and the effective length of anode foils 11 is greater than the effective length of Cathode Foil 12.The present invention discloses multiple different structure at this, but be not limited to described embodiment and winding thereof, the mode such as fixing, as long as anode foils 11 length is greater than Cathode Foil 12 length, and in winding shaping process, this anode foils 11 can not contact with each other and short circuit with Cathode Foil 12.
With Fig. 3 embodiment, the inner side of capacitor core 10 is the first separator 13, be sequentially Cathode Foil 12 from inside to outside, second separator 14 and anode foils 11, anode foils 11 and Cathode Foil 12 connect positive pin 31 and negative pin 32 respectively, be positioned at outermost anode foils 11 end outer surface can be sticked an adhesive tape 41 or inner surface coating viscose 42, this embodiment is for adhesive tape 41, after winding terminates, be looped around outermost surface with adhesive tape 41 and fixed effect is provided, prevent the anode foils 11 after reeling, Cathode Foil 12 and separator 13, 14 there is loose problem, this layer structure, after winding operation, namely forms capacitor core 10 as shown in Figure 8.
With Fig. 4 embodiment, the inner side of capacitor core 10 is Cathode Foil 12, be followed successively by the first separator 13, anode foils 11 and the second separator 14 from inside to outside, this kind of arrangement mode still can guarantee that the length of anode foils 11 is greater than the length of Cathode Foil 12, in this embodiment, be positioned at the latter end coating viscose 42 of outermost second separator 14, after winding terminates, utilize viscose 42 to bind fixing.
Please refer to shown in Fig. 5,6, its layered arrangement mode is identical with the mode shown in earlier figures 3,4 respectively, difference is in and is formed so that same separator bending is rear in this first separator 13 and this second separator 14, from bending place as winding start point, separator after bending is still and anode foils 11 and Cathode Foil 12 is separated out, and avoids positive-negative polarity directly to contact.
In earlier figures 3 ~ 6 embodiment, be synchronously outwards reel from center from coil to coil with four-layer structure, therefore capacitor core 10 is all maintained four-layer structure from the beginning to the end.Except aforementioned manner, the present invention reoffers another embodiment, please refer to shown in Fig. 7, capacitor core 10 inner side is Cathode Foil 12, layered arrangement is from inside to outside followed successively by the first separator 13, anode foils 11 and the second separator 14, wherein, the length of this Cathode Foil 12 is much smaller than anode foils 11, and the length of Cathode Foil 12 need only guarantee that the distance of this negative pin 32 relative centre after the coiling meets set specification.
When carrying out winding operation, please refer to shown in Fig. 9, center first outwards reels with four-layer structure, this first separator 11 and Cathode Foil 12 will first reel complete, again with anode foils 11 and this two-layer structure from coil to coil of the second separator 14 outwards around, therefore the inside region of capacitor core 10 is four-layer structure, and exterior lateral area is two-layer structure.This kind of arrangement mode is also applicable to the embodiment of Fig. 3, makes the length of anode foils 11 much larger than Cathode Foil 12, more can improve effective capacitance amount further.
Refer to shown in Figure 10, the capacitor core 10 after having reeled utilizes impregnation operation, forms an electroconductive polymer layer on the surface of anode foils 11 and Cathode Foil 12.For the anode foils 11 shown in partial enlarged drawing, utilize once overetched metal forming 110 (such as aluminium foil) be main base material, this metal forming 110 is first placed in forming liquid carries out changing into operation and first forming an oxidation dielectric skin 111 on its surface, i.e. alundum (Al2O3) (Al
2o
3), then form electroconductive polymer layer 112 through an impregnation operation on the surface of this oxide layer 111.
And Cathode Foil 12 can be main base material by metal forming (as aluminium foil), it can be passed through or without etched surfaces process, also can pass through or without oxidation processes, finally plate carbon-coating or titanium layer.Separator 13,14 is set between anode foils 11 and Cathode Foil 12 and after being wound into cylindrical shape, then impregnated in electrolytical solution, give thermal polymerization, make to form electroconductive polymer layer 112 between anode foils 11 and Cathode Foil 12.
Electroconductive polymer layer 112 is comparatively preferably and is containing fatty family, fragrant family, heterocyclic compound (heterocycliccompound) and contains more than at least one of the electroconductive polymer that hetero-atom (hetero) is.Especially, by including, polythiophene (polythiophene) is, polypyrrole (Polypyrrole) is, polyaniline (polyaniline) is electroconductive polymer and Absorbable organic halogens form electroconductive polymer layer 112.
In sum, the present invention, under the prerequisite that must not change existing electric capacity material, makes the anode foils length of capacitor core be greater than Cathode Foil length, and the effective capacitance amount of capacitor core can be made to improve and can not derive extra electric capacity cost of manufacture.
The above is only the preferred embodiments of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a solid state electrolytic capacitor core, is characterized in that, includes:
One mandrel body, form with winding after an anode foils, a Cathode Foil and multiple separator alternately insulation arrangement, the length of this anode foils is greater than the length of this Cathode Foil;
One positive pin and a negative pin, is electrically connected anode foils and the Cathode Foil of this capacitor core respectively;
Wherein, the computing formula of capacitance is
ca=L1 × W × P, Ce=L2 × W × N, and Ce is at least greater than Ca 30 times;
L1: anode foils length;
L2: Cathode Foil length;
W: anode foils, Cathode Foil width;
P: the capacitance that anode foils per unit has;
N: the capacitance that Cathode Foil per unit has.
2. solid state electrolytic capacitor core according to claim 1, this mandrel body center inner side is the first separator, sequentially alternately to insulate arrangement with Cathode Foil, the second separator and anode foils from inside to outside.
3. solid state electrolytic capacitor core according to claim 1, this mandrel body center inner side is this Cathode Foil, sequentially alternately to insulate arrangement with the first separator, anode foils and the second separator from inside to outside.
4. the solid state electrolytic capacitor core according to Claims 2 or 3, this first separator and the second separator are to be formed after same separator bending.
5. the solid state electrolytic capacitor core according to Claims 2 or 3, this mandrel body is synchronously outwards synchronously reeled by center with the four-layer structure that this anode foils, Cathode Foil and first, second separator are formed and formed.
6. solid state electrolytic capacitor core according to claim 4, this capacitor core is synchronously outwards synchronously reeled by center with the four-layer structure that this anode foils, Cathode Foil and first, second separator are formed and formed.
7. the solid state electrolytic capacitor core according to Claims 2 or 3, the inside region of this mandrel body comprises the four-layer structure that this anode foils, Cathode Foil and first, second separator are formed; The exterior lateral area of this mandrel body comprises the two-layer structure that anode foils and the second separator are formed.
8. solid state electrolytic capacitor core according to claim 2, is positioned at outermost anode foils latter end and arranges an adhesive tape.
9. solid state electrolytic capacitor core according to claim 3, the latter end being positioned at outermost second separator arranges an adhesive tape.
10. a solid electrolytic capacitor, is characterized in that, includes:
One shell;
One capacitor core, is arranged at this enclosure, and this capacitor core forms with winding after an anode foils, a Cathode Foil and multiple separator alternately insulation arrangement, and the length of this anode foils is greater than the length of this Cathode Foil, and wherein this anode foils and Cathode Foil respectively include:
One metal forming;
One oxide layer, is formed in the surface of this metal forming; And
One electroconductive polymer layer, is formed in the surface of this oxide layer;
One positive pin and a negative pin, is electrically connected the anode foils of this capacitor core and Cathode Foil respectively and runs through shell and stretch out;
Wherein, the computing formula of capacitance is
ca=L1 × W × P, Ce=L2 × W × N, and Ce is at least greater than Ca 30 times;
L1: anode foils length;
L2: Cathode Foil length;
W: anode foils, Cathode Foil width;
P: the capacitance that anode foils per unit has;
N: the capacitance that Cathode Foil per unit has.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378263.2A CN103137331B (en) | 2011-11-24 | 2011-11-24 | Solid state electrolytic capacitor core and capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378263.2A CN103137331B (en) | 2011-11-24 | 2011-11-24 | Solid state electrolytic capacitor core and capacitor |
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| Publication Number | Publication Date |
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| CN103137331A CN103137331A (en) | 2013-06-05 |
| CN103137331B true CN103137331B (en) | 2016-01-27 |
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| CN201110378263.2A Expired - Fee Related CN103137331B (en) | 2011-11-24 | 2011-11-24 | Solid state electrolytic capacitor core and capacitor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008041872A (en) * | 2006-08-04 | 2008-02-21 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor and its manufacturing method |
| CN101317242A (en) * | 2005-12-01 | 2008-12-03 | 松下电器产业株式会社 | Wound electric double-layer capacitor |
| CN101351573A (en) * | 2005-12-28 | 2009-01-21 | 住友金属矿山株式会社 | Stephanoporate valve metallic thin-film and manufacturing method thereof as well as thin-film capacitor |
| CN101689429A (en) * | 2007-04-20 | 2010-03-31 | 富士通株式会社 | Electrode foil, process for producing the electrode foil, and electrolytic capacitor |
-
2011
- 2011-11-24 CN CN201110378263.2A patent/CN103137331B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101317242A (en) * | 2005-12-01 | 2008-12-03 | 松下电器产业株式会社 | Wound electric double-layer capacitor |
| CN101351573A (en) * | 2005-12-28 | 2009-01-21 | 住友金属矿山株式会社 | Stephanoporate valve metallic thin-film and manufacturing method thereof as well as thin-film capacitor |
| JP2008041872A (en) * | 2006-08-04 | 2008-02-21 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor and its manufacturing method |
| CN101689429A (en) * | 2007-04-20 | 2010-03-31 | 富士通株式会社 | Electrode foil, process for producing the electrode foil, and electrolytic capacitor |
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| CN103137331A (en) | 2013-06-05 |
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Granted publication date: 20160127 Termination date: 20171124 |