CN205140757U - Electrolytic capacitor - Google Patents
Electrolytic capacitor Download PDFInfo
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- CN205140757U CN205140757U CN201520974884.0U CN201520974884U CN205140757U CN 205140757 U CN205140757 U CN 205140757U CN 201520974884 U CN201520974884 U CN 201520974884U CN 205140757 U CN205140757 U CN 205140757U
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Abstract
The utility model relates to an electrolytic capacitor, include: contain the metal of valve or tantalum, niobium, aluminium, titanium, zirconium, vanadium or metallic compound's positive pole, formed at the dielectric layer on positive pole surface, formed at electrolyte layer on the dielectric layer, formed at negative pole on the electrolyte layer, cathode surface is formed with the organic metal tiO2 membrane through electric chemistry. The utility model discloses guaranteeing under the condition that cathode foil mechanical strength and capacity were easily drawn that further reduced size improve the cathode foil specific volume, and preparation technology is simple by a wide margin, environmental protection, reliable.
Description
Technical field
The utility model relates to energy storage device and manufactures field, particularly relates to a kind of electrolytic capacitor.
Background technology
The capacity of capacitor is mainly by anode foils capacity impact, for high-voltage electrolysis capacitor, because anode foils specific volume is much little compared with Cathode Foil specific volume, thus the capacity of capacitor is close to the capacity of anode foils, but for low-voltage electrolytic capacitor, it is very high that its anode foils specific volume can do, such as, can reach 220 μ F/cm
2, close to Cathode Foil specific volume, Cathode Foil specific volume is just just more remarkable to the capacity impact of capacitor in this case.At present, the specific volume of Cathode Foil is up to 600 μ F/cm
2left and right, due to the restriction due to mechanical strength and corrosion technology, think that significantly improving Cathode Foil specific volume further seems especially difficult, and traditional Fabrication of High Specific Capacitance bears the SO that paper tinsel brings when corroding by etching process
4 2-and CL
-the problem that difficulty cleans up, affects the reliability of electrochemical capacitor.Therefore, for obtained a kind of super contracting body low-voltage electrolysis electric capacity, a kind of cathode material of superelevation specific volume is found just to seem particularly important.
Relate to the less of Cathode Foil research in domestic and international manufacturer electrolytic capacitor at present, and the life-span of electrolytic capacitor is also the difficult problem that super contracting body capacitance need be captured.
Summary of the invention
In order to overcome above-mentioned defect, the utility model provides a kind of electrolytic capacitor, is ensureing, under the condition that Cathode Foil mechanical strength and capacity are easily drawn, reduce volume further, significantly improve Cathode Foil specific volume, and preparation technology to be simple, environmental protection, reliable.
To achieve these goals, the technical solution of the utility model is:
A kind of electrolytic capacitor, comprising: containing valve or tantalum, niobium, aluminium, titanium, zirconium, the metal of vanadium or the anode of metallic compound; Be formed at the dielectric layer of described anode surface; Be formed at the dielectric substrate on described dielectric layer; Be formed at the negative electrode on described dielectric substrate, described cathode surface is by being electrochemically formed with organic metal TiO2 film.
Further improvement of the utility model is: described cathode material is titanium foil, and further simplified processing process can further improve cathode performance and reliability simultaneously.
Further improvement of the utility model is: the TiO2 film thickness of described formation is 0.8-1.5 μm, like this under the performances such as negative electrode mechanical strength, capacity extraction, the reliability of maximum raising Cathode Foil specific volume and product, can reduce the volume of electrolytic capacitor simultaneously as far as possible.
Further improvement of the utility model is: the TiO2 film thickness of described formation is preferably 1.0 μm.
Further improvement of the utility model is: described dielectric layer is valve metal oxide-film, thus improves the overall performance of electrolytic capacitor.
Prepare a method for electrolytic capacitor, comprise the following steps:
A) organic metal Ti O2 film is formed at cathode surface; Containing dielectric layer valve or tantalum, niobium, aluminium, titanium, zirconium, the metal of vanadium or the anode of metallic compound being formed valve metal oxide-film;
B) anode, negative electrode and barrier paper are cut into required width;
C) use nailing machine is by the nail joint of positive and negative guide pin difference on positive and negative paillon foil, and the paillon foil after nail joint and release paper are coiled into core bag;
D) the core bag be rolled into is carried out drying and processing;
E) adopt electrolyte impregnation, dry rear core bag by heat treatment afterwards;
F) assemble, aging.
Further improvement of the utility model is: described cathode material is titanium foil.
Further improvement of the utility model is: the organic metal TiO2 film thickness of described formation is 0.8-1.5 μm.
The electrolytic capacitor that the utility model provides, the Cathode Foil that tradition adopts etching process is substituted by a kind of organic Cathode Foil of composite construction, due to the existence of organic metal TiO2 film, provide superhigh specific surface area, little at guarantee volume, under the condition that Cathode Foil mechanical strength and capacity are easily drawn, significantly improve Cathode Foil specific volume, this is more space for anode foils provides, and fully caters to electrochemical capacitor miniaturization, jumbo development trend.And TiO2 has excellent physical and chemical performance and good heat resistance, during high frequency, impedance is low, bears reverse voltage in circuit high, during Long-Time Service, epithelium degradation is low, can immediate current be born, choked flow epithelium can not occur, substantially prolongs the useful life of product.The preparation method that simultaneously the utility model relates to solves traditional Fabrication of High Specific Capacitance and bears the SO that paper tinsel brings when corroding
4 2-and CL
-the problem that difficulty cleans up, and preparation technology's comparatively simple, environmental protection of traditional capacitor.
Figure of description
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment 1: as shown in Figure 1, the utility model relates to a kind of electrolytic capacitor, comprising: the anode 1 containing valve metal; The dielectric layer 3 of the valve metal oxide-film of described anode surface is formed at by chemical method; Be formed at the dielectric substrate 5 on described dielectric layer; Be formed at the negative electrode 2 on described dielectric substrate, described cathode surface is by being electrochemically formed with organic metal TiO2 film 4, and wherein said cathode material is titanium foil; The TiO2 film thickness formed is 1.0 μm.Described negative electrode is provided with negative pole pin 7, and described anode is provided with positive pole pin 6.
Prepare a method for electrolytic capacitor, comprise the following steps:
A) based on titanium foil, material forms negative electrode, forms at cathode surface the organic metal TiO2 film that thickness is 1.0 μm; Containing the dielectric layer anode of valve metal being formed valve metal oxide-film;
B) anode, negative electrode and barrier paper are cut into required width;
C) use nailing machine is by the nail joint of positive and negative guide pin difference on positive and negative paillon foil, and the paillon foil after nail joint and release paper are coiled into core bag;
D) the core bag be rolled into is carried out drying and processing;
E) adopt electrolyte impregnation, dry rear core bag by heat treatment afterwards;
F) assemble, aging.
Contrast is detected as follows through material object:
Be prepared according to traditional preparation methods, negative paper tinsel adopts traditional corroding cathode paper tinsel, and can obtain specification is 16V470 μ F, the minimum conventional low aluminium electrolytic capacitor for φ 8mm × 11.5mm of size.
Carry out performance test to obtained traditional corroding cathode paper tinsel electrolytic capacitor, test result is in table 1:
The structure provided according to the utility model and preparation process are prepared, and adopt organic metal TIO
2material cladding forms anode foil, can obtain that specification is 16V470 μ F, size can be contracted to φ 6.3mm × 9mm, the life-span can reach the organic metal Cathode Foil low-voltage electrolytic capacitor of 5000 hours.
Carry out performance test to the electrolytic capacitor that obtained the utility model relates to, test result is in table 2:
Comparative example 1 and embodiment 2, the electrolytic capacitor specification related to is all 16V470 μ F, and is of a size of φ 6.3mm × 9mm, is ensureing, under the prerequisite of classical insulation with traditional alminium electrolytic condenser, effectively small product size to be reduced 50%.
The Cathode Foil of organic composite structure is substituted traditional corroding cathode paper tinsel by the utility model, and traditional corroding cathode aluminium foil surface is natural or the artificial Al formed
2o
3film, basis material is aluminium foil, and the Cathode Foil of organic composite structure is the TIO of about 1 μm of surface by electrochemically being formed
2epithelium, basis material is then titanium foil.
The utility model can effectively reduce the volume of Cathode Foil, reduces the volume of product, but due to the existence of TiO2 film, provide superhigh specific surface area, thus significantly improve Cathode Foil specific volume, this is more development space for anode foils provides.
The utility model technique is simple, environmental protection, without the need to increasing extras, saving manufacturing cost, being easy to realize industrialization.
The above embodiment only have expressed execution mode of the present utility model; therefore the restriction to the utility model the scope of the claims can not be interpreted as; every utilize the utility model description to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. an electrolytic capacitor, is characterized in that: comprising: containing valve or tantalum, niobium, aluminium, titanium, zirconium, the metal of vanadium or the anode of metallic compound; Be formed at the dielectric layer of described anode surface; Be formed at the dielectric substrate on described dielectric layer; Be formed at the negative electrode on described dielectric substrate, described cathode surface is by being electrochemically formed with organic metal TiO2 film.
2. electrolytic capacitor according to claim 1, is characterized in that: described cathode material is titanium foil.
3. electrolytic capacitor according to claim 1, is characterized in that: the TiO2 film thickness of described formation is 0.8-1.5 μm.
4. electrolytic capacitor according to claim 1, is characterized in that: the TiO2 film thickness of described formation is 1.0 μm.
5. electrolytic capacitor according to claim 1, is characterized in that: described dielectric layer is valve metal oxide-film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974884.0U CN205140757U (en) | 2015-12-01 | 2015-12-01 | Electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974884.0U CN205140757U (en) | 2015-12-01 | 2015-12-01 | Electrolytic capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN205140757U true CN205140757U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520974884.0U Active CN205140757U (en) | 2015-12-01 | 2015-12-01 | Electrolytic capacitor |
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| CN (1) | CN205140757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355434A (en) * | 2015-12-01 | 2016-02-24 | 常州华威电子有限公司 | Electrolytic capacitor and preparation method |
-
2015
- 2015-12-01 CN CN201520974884.0U patent/CN205140757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355434A (en) * | 2015-12-01 | 2016-02-24 | 常州华威电子有限公司 | Electrolytic capacitor and preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiang Xiaoqin Inventor after: Yang Hongzhen Inventor after: Yin Wanglong Inventor before: Yan Qixu Inventor before: Wang Kunliang Inventor before: Zhu Shengli |
|
| CB03 | Change of inventor or designer information |