CN111613447B - Laminated electrolytic capacitor and method for manufacturing the same - Google Patents
Laminated electrolytic capacitor and method for manufacturing the same Download PDFInfo
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- CN111613447B CN111613447B CN202010440807.2A CN202010440807A CN111613447B CN 111613447 B CN111613447 B CN 111613447B CN 202010440807 A CN202010440807 A CN 202010440807A CN 111613447 B CN111613447 B CN 111613447B
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- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
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- H01G9/035—Liquid electrolytes, e.g. impregnating materials
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Abstract
The invention provides a laminated aluminum electrolytic capacitor and a manufacturing method thereof. The manufacturing method comprises the following steps: providing modified or unmodified two-way porous alumina template electrolytic paper; slitting; puncturing and riveting; laminating; optionally demolding; impregnation and packaging. The invention uses the double-pass porous alumina template to replace the traditional electrolytic paper to be applied to the aluminum electrolytic capacitor, avoids the perforation problem of the electrolytic paper in the aluminum electrolytic capacitor, increases the liquid content of the absorbed electrolyte, improves the capacity extraction rate, improves the loss and the heat generation of the aluminum electrolytic capacitor and prolongs the service life.
Description
Technical Field
The invention belongs to the capacitor technology, and particularly relates to a method for manufacturing a laminated aluminum electrolytic capacitor and a capacitor manufactured by the method.
Background
The aluminum electrolytic capacitor consists of anode foil, cathode foil, electrolytic paper, electrolyte, a lead-out strip and a packaging shell, wherein the electrolytic paper is used between an anode and a cathode of the aluminum electrolytic capacitor, and plays a role in blocking the anode and the cathode on one hand; on the other hand, the electrolytic paper absorbs and stores the electrolyte, and the capacity extraction rate and the high temperature resistance of the aluminum electrolytic capacitor are improved. The requirements of paper for the aluminum electrolytic capacitor are different from those of common paper, the requirements of the paper are high purity, uniform thickness and tightness, uniform fiber arrangement, sufficient electrolyte absorption and capacity extraction rate guarantee.
Because of the characteristics of the production process of the electrolytic paper, the electrolytic paper adopted by the aluminum electrolytic capacitor in the current market can generate pinholes, and the insulation between the anode foil and the cathode foil of the aluminum electrolytic capacitor mainly depends on the electrolytic paper to eliminate the short circuit caused by the burrs of the anode foil due to cutting except the anode foil oxide film, so that the potential safety hazard of the manufactured aluminum electrolytic capacitor can be caused by the pinholes of the electrolytic paper. In order to solve the problem of pinhole of the electrolytic paper, manufacturers of the electrolytic paper or manufacturers of the capacitor usually adopt a staggered laminating mode of two or more layers of electrolytic paper to eliminate pinholes, or improve the density or thickness of the electrolytic paper to improve the aluminum foil burr resistance of the electrolytic paper. However, the method can lead to the increase of the thickness of the electrolytic paper, not only can the size of the manufactured capacitor be increased, but also the loss, ESR and the like of the capacitor are increased, further the heat generation of the capacitor is increased in the using process, and the service life is shortened; in addition, the method can not completely eliminate the pinholes of the electrolytic paper, and the manufactured capacitor still has potential safety hazards.
Therefore, there is a need for improvements in existing electrolytic paper.
Disclosure of Invention
The invention provides electrolytic paper with a novel structure, a laminated electrolytic capacitor containing the electrolytic paper and a manufacturing method thereof, aiming at the problem of pinholes in the existing electrolytic paper. Specifically, the double-pass porous alumina template (double-pass AAO template) is used for replacing the conventional electrolytic paper, so that the short circuit probability of the aluminum electrolytic capacitor can be reduced, the storage capacity of electrolyte can be improved, the capacity extraction rate can be improved, the loss of the capacitor can be reduced, the heat generation can be improved, and the service life of the aluminum electrolytic capacitor can be prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided a laminated aluminum electrolytic capacitor using a two-pass porous alumina template as electrolytic paper.
The bi-pass porous alumina template (bi-pass AAO template) is a template material with a regular nano porous structure, the pore arrangement of the front and the back is short-distance highly ordered, the pore diameter is uniform, the pore diameter is adjustable from dozens of nanometers to hundreds of nanometers, and the internal pore channels are straight, parallel and not crossed. When the thickness of the template reaches dozens of microns, the template can be independently self-supporting and has certain strength and elasticity. The alumina in the bi-pass AAO template is amorphous and has strong hygroscopicity. Therefore, the structure and the performance of the double-pass AAO template meet the requirements of the aluminum electrolytic capacitor on the electrolytic paper. The bi-pass AAO template is used for replacing the existing electrolytic paper, and the surface area of the bi-pass AAO template is controlled by regulating and controlling the aperture and the thickness, so that the perforation problem can be avoided; on the other hand, the electrolyte content can be better regulated, the capacity extraction rate is improved, the loss and the heat generation of the aluminum electrolytic capacitor are improved, and the service life is prolonged.
According to some embodiments of the present invention, the double-pass porous alumina template has a thickness of 20 to 50 μm and a pore size of 60 to 200 nm.
Specifically, the thickness of the two-pass porous alumina template can be exemplified by: 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, 32 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, 48 μm, 50 μm, and the like.
The pore size of the double-pass porous alumina template can be listed as follows: 60nm, 65nm, 70nm, 75nm, 80nm, 85nm, 90nm, 95nm, 100nm, 105nm, 110nm, 115nm, 120nm, 125nm, 130nm, 135nm, 140nm, 145nm, 150nm, 155nm, 160nm, 165nm, 170nm, 175nm, 180nm, 185nm, 190nm, 195nm, 200nm, and the like.
In some embodiments, the pore size of the two-pass porous alumina template is 60-100 nm; in some embodiments, the pore size of the double-pass porous alumina template is 100-200 nm; in yet other embodiments, the pore size of the two-pass porous alumina template is between 60 and 150 nm; in some embodiments, the pore size of the bi-pass porous alumina template is 100-150 nm; in some embodiments, the pore size of the two-pass porous alumina template is 150-200 nm.
For a large-size laminated electrolytic capacitor, the double-pass porous alumina template has certain strength and elasticity when the thickness reaches dozens of microns, and can meet the use requirements of the double-pass porous alumina template, so that the double-pass porous alumina template can be directly used as electrolytic paper.
According to some embodiments provided by the present invention, a method of manufacturing a laminated electrolytic capacitor directly using a two-pass porous alumina template as electrolytic paper, comprises:
(1) providing double-pass porous alumina template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the bi-pass porous alumina template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil, the double-pass porous alumina template electrolytic paper, the anode foil, the double-pass porous alumina template electrolytic paper and the cathode foil in sequence;
(5) impregnation and packaging: and impregnating the laminated core package with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
For the small-size laminated electrolytic capacitor, because the requirement on the strength of the electrolytic paper is higher in the manufacturing process, and the double-pass porous alumina template is directly used as the electrolytic paper or has the risk of breakage, in the manufacturing process of the capacitor, the double-pass porous alumina template is modified, and a layer of high-strength organic material film is plated on the surface of the double-pass porous alumina template in advance to serve as a support body, so that the strength of the capacitor is improved. And after the laminated capacitor core package is formed, peeling off the support body. The double-pass porous alumina template can meet the requirements of laminated capacitors with different sizes by the process.
According to still further embodiments provided by the present invention, a method of manufacturing a laminated electrolytic capacitor includes:
(1) modification of electrolytic paper: arranging organic material films on two surfaces of the double-pass porous alumina template electrolytic paper to obtain modified double-pass porous alumina template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the bi-pass porous alumina template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way porous alumina template electrolytic paper-anode foil-modified two-way porous alumina template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning, demolding and drying the laminated core cladding in an ethanol solution to remove organic material films on two surfaces of the two-way porous alumina template electrolytic paper;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
According to some embodiments provided herein, the electrolytic paper modification comprises: the bi-pass porous alumina template is dipped in organic solution containing organic materials and then dried.
Specifically, the organic material is at least one of methyl methacrylate and ethyl methacrylate.
Specifically, the organic solvent for forming the organic solution is at least one of ethanol, diethyl ether and acetone.
According to some embodiments of the invention, the organic solution has a mass fraction of 0.2 to 1%, for example: 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc. When the concentration of the organic material is too low, the organic material cannot permeate the surface and the interior of the bi-pass AAO template, so that film forming defects are easily generated, the strength and the thickness of a film layer are insufficient, and the film layer cannot effectively play a supporting role; when the concentration is too high, the film is too thick, which is not beneficial to later cleaning and demoulding.
According to some embodiments of the present invention, the organic material is methyl methacrylate, and the organic solvent is any one of ethanol, diethyl ether, and acetone.
According to some embodiments of the present invention, the mass fraction of the organic solution of methyl methacrylate is preferably 0.2 to 1%.
According to some embodiments of the present invention, the mass fraction of the organic solution of methyl methacrylate may be: 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc.
According to some embodiments of the present invention, the organic material is ethyl methacrylate, and the organic solvent is any one of ethanol, diethyl ether, and acetone.
According to some embodiments of the present invention, the organic solution of ethyl methacrylate preferably has a mass fraction of 0.2 to 1%.
According to some embodiments of the present invention, the mass fraction of the organic solution of ethyl methacrylate may be: 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc.
According to some embodiments of the invention, the impregnation conditions are: soaking at 20-60 deg.C for 2-5 min.
According to some embodiments of the present invention, the impregnation temperature may be: 20 deg.C, 25 deg.C, 30 deg.C, 35 deg.C, 40 deg.C, 45 deg.C, 50 deg.C, 55 deg.C, 60 deg.C, etc.
According to some embodiments provided herein, the dipping time may range from: 2min, 2.5min, 3min, 3.5min, 4min, 4.5min, 5min, and so on.
According to some embodiments of the invention, the drying conditions after impregnation are: treating at 120-200 ℃ for 15-30 min.
According to some embodiments of the present invention, the drying temperature after the impregnation may be: 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, and the like.
According to some embodiments of the present invention, the drying time after the dipping may be: 15min, 17min, 19min, 20min, 21min, 23min, 25min, 26min, 28min, 30min, and so on.
And removing the organic material films on the two surfaces of the electrolytic paper of the bi-pass porous alumina template by the core package after lamination through a demoulding process. According to some embodiments provided herein, the demolding comprises: and (3) cleaning the laminated core bag in an organic solvent at 20-40 ℃ for 5-10min, and then drying.
According to some embodiments of the present invention, in the step of releasing, the organic solvent is at least one of acetone, tetrahydrofuran, toluene, and xylene.
According to some embodiments of the present invention, in the step of releasing, the organic solvent is any one of acetone, ethanol, toluene, xylene, and tetrahydrofuran.
According to some embodiments of the present invention, the cleaning temperature may be: 20 deg.C, 25 deg.C, 30 deg.C, 35 deg.C, 40 deg.C, etc.
According to some embodiments of the invention, the washing time may be: 5min, 5.5min, 6min, 6.5min, 7min, 7.5min, 8min, 8.5min, 9min, 9.5min, 10min, and so on.
The drying conditions after cleaning are not particularly limited, and the solvent can be completely volatilized, and can be selected according to the selected cleaning solvent.
When the cleaning solvent is acetone, ethanol or tetrahydrofuran, drying at 70-100 deg.C for 5-10 min.
When the cleaning solvent is toluene or xylene, the drying can be carried out at 100-140 ℃ for 5-10 min.
In the method for manufacturing a laminated aluminum electrolytic capacitor according to the present invention, the steps of slitting, piercing and riveting, laminating, impregnating, and sealing may be performed according to a method known in the art, and are not particularly limited.
Compared with the prior art, the invention has the following technical effects:
the invention uses the bi-pass AAO template to replace the electrolytic paper to be applied to the aluminum electrolytic capacitor, the hole arrangement of the front and back surfaces is short-range highly ordered, the aperture is uniform, the internal pore channels are straight, parallel and not crossed, and the perforation problem in the aluminum electrolytic capacitor is avoided; meanwhile, the liquid content of the absorbed electrolyte is increased, the capacity extraction rate is improved, the loss and the heat generation of the aluminum electrolytic capacitor are improved, and the service life is prolonged.
Drawings
FIG. 1 shows a flow chart of a method of manufacturing a laminated electrolytic capacitor according to some embodiments of the present invention; and
fig. 2 shows a flow chart of a method of manufacturing a laminated electrolytic capacitor according to another embodiment of the present invention.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. All patents and publications referred to herein are incorporated by reference in their entirety. The term "comprising" or "comprises" is open-ended, i.e. comprising what is specified in the present invention, but not excluding other aspects.
Embodiments of the present invention will be described in detail below with reference to the drawings and examples, but those skilled in the art will understand that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples were carried out under conditions described in the specification, under conventional conditions or under conditions recommended by the manufacturer, unless otherwise specified. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
In this embodiment, as shown in fig. 1, the manufacturing process of the laminated aluminum electrolytic capacitor includes:
(1) providing bi-pass porous alumina template electrolytic paper with the thickness of 40 mu m and the aperture of 100 nm;
(2) slitting: cutting the anode foil, the cathode foil and the bi-pass AAO template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil, the double-pass porous alumina template electrolytic paper, the anode foil, the double-pass porous alumina template electrolytic paper and the cathode foil in sequence;
(5) impregnation and packaging: and impregnating the laminated core package with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
Example 2
In this embodiment, as shown in fig. 2, the manufacturing process of the laminated aluminum electrolytic capacitor includes:
(1) dissolving methyl methacrylate in acetone to prepare a solution with the mass fraction of 0.5%; dipping a bi-pass AAO template with the thickness of 40 mu m and the aperture of 100nm in the acetone solution of the methyl methacrylate, dipping for 3min at 40 ℃, and then treating for 20min at 150 ℃ to obtain modified bi-pass AAO template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the modified two-way AAO template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way AAO template electrolytic paper-anode foil-modified two-way AAO template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning the laminated core bag in acetone at 40 ℃ for 8min and drying;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
Example 3
In this embodiment, as shown in fig. 2, the manufacturing process of the laminated aluminum electrolytic capacitor includes:
(1) dissolving ethyl methacrylate in ethanol to prepare a solution with the mass fraction of 1%; dipping a bi-pass AAO template with the thickness of 20 mu m and the aperture of 60nm in the ethyl methacrylate ethanol solution, dipping for 2min at 20 ℃, and then treating for 30min at 120 ℃ to obtain modified bi-pass AAO template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the modified two-way AAO template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way AAO template electrolytic paper-anode foil-modified two-way AAO template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning the laminated core bag in toluene at 20 ℃ for 5min and drying;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
Example 4
In this embodiment, as shown in fig. 2, the manufacturing process of the laminated aluminum electrolytic capacitor includes:
(1) dissolving methyl methacrylate in ether to prepare a solution with the mass fraction of 0.2%; soaking a bi-pass AAO template with the thickness of 50 mu m and the pore diameter of 200nm in the ether solution of the methyl methacrylate for 5min at 60 ℃, and then treating for 18min at 180 ℃ to obtain modified bi-pass AAO template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the modified two-way AAO template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way AAO template electrolytic paper-anode foil-modified two-way AAO template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning the laminated core bag in xylene at 40 ℃ for 10min and drying;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
Example 5
In this embodiment, as shown in fig. 2, the manufacturing process of the laminated aluminum electrolytic capacitor includes:
(1) dissolving methyl methacrylate in acetone to prepare a solution with the mass fraction of 0.8%; soaking a bi-pass AAO template with the thickness of 30 mu m and the pore diameter of 150nm in the acetone solution of the methyl methacrylate for 3min at 30 ℃, and then treating for 15min at 200 ℃ to obtain modified bi-pass AAO template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the modified two-way AAO template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way AAO template electrolytic paper-anode foil-modified two-way AAO template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning the laminated core bag in tetrahydrofuran at 30 ℃ for 7min and drying;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
Comparative example
The laminated aluminum electrolytic capacitor was prepared using a conventional electrolytic paper (sisal pulp, spanish grass pulp, manila hemp pulp, or the like, prepared by a sedimentation process) having a thickness of 40 μm, in the same procedure as in example 1.
Performance testing
The prepared laminated electrolytic capacitor was subjected to capacity extraction, loss and withstand voltage value tests, and the test results are shown in table 1, and the percentage increase or decrease described in the standard are data obtained with respect to the comparative example.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Percentage increase in capacity extraction (%) | 17.3 | 23.1 | 21.5 | 19.4 | 20.7 |
| Percent loss (%) | 4.8 | 6.7 | 5.4 | 5.6 | 6.2 |
| Percentage increase in pressure resistance (%) | 3.6 | 6.8 | 4.5 | 5.7 | 6.1 |
| Yield (%) | Over 99 percent | Over 99 | Over 99 | Over 99 | 99 and 99 ofOn the upper part |
As can be seen from Table 1, the process of replacing the electrolytic paper with the double-pass AAO template obviously improves the capacity extraction rate of the laminated aluminum electrolytic capacitor, reduces the leakage current and the short-circuit defective rate, and achieves the yield of more than 99%. The bi-pass AAO template is protected by the polymer film in the manufacturing process, so that the performance of the laminated aluminum electrolytic capacitor can be further improved. The laminated aluminum electrolytic capacitor prepared by the invention has the remarkable advantages of high capacity, low loss and high voltage withstanding value.
In the description herein, references to the description of the terms "some embodiments," "other embodiments," "an embodiment," "an example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention and examples have been shown and described above, it is understood that the above embodiments, examples are illustrative and not to be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments, examples by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A method of manufacturing a laminated electrolytic capacitor, comprising:
(1) modification of electrolytic paper: dipping a double-pass porous alumina template into an organic solution containing an organic material, drying, and forming organic material films on two surfaces of the double-pass porous alumina template electrolytic paper to obtain modified double-pass porous alumina template electrolytic paper;
(2) slitting: cutting the anode foil, the cathode foil and the bi-pass porous alumina template electrolytic paper into specified sizes;
(3) and (4) piercing and riveting: piercing and riveting the anode foil and the cathode foil;
(4) laminating: stacking the cathode foil-modified two-way porous alumina template electrolytic paper-anode foil-modified two-way porous alumina template electrolytic paper-cathode foil in sequence;
(5) demolding: cleaning, demolding and drying the laminated core cladding in an organic solvent to remove organic material films on two surfaces of the electrolytic paper of the bi-pass porous alumina template;
(6) impregnation and packaging: and impregnating the dried core cladding with electrolyte, and then packaging the aluminum shell to obtain the laminated aluminum electrolytic capacitor.
2. The method of manufacturing a laminated electrolytic capacitor as claimed in claim 1, wherein the organic material is at least one of methyl methacrylate and ethyl methacrylate, and the organic solvent for forming an organic solution is at least one of ethanol, diethyl ether and acetone.
3. The method of manufacturing a laminated electrolytic capacitor as recited in claim 1, wherein the organic solution has a mass fraction of 0.2 to 1%.
4. The method of manufacturing a laminated electrolytic capacitor as recited in claim 1, wherein the impregnation conditions are: soaking at 20-60 deg.C for 2-5 min.
5. The method of manufacturing a laminated electrolytic capacitor as claimed in claim 1, wherein the drying conditions are: treating at 120-200 ℃ for 15-30 min.
6. The method of manufacturing a laminated electrolytic capacitor as claimed in claim 1, wherein in the step (5), the organic solvent is at least one of acetone, tetrahydrofuran, toluene, and xylene.
7. The method of manufacturing a laminated electrolytic capacitor as claimed in claim 1, wherein in step (5), the cleaning conditions are: cleaning at 20-40 deg.C for 5-10 min.
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| CN108183189A (en) * | 2017-12-07 | 2018-06-19 | 常州市沃兰特电子有限公司 | A kind of preparation method of high temp resistance lithium ion cell diaphragm |
| CN110148699A (en) * | 2019-06-12 | 2019-08-20 | 扬州中锂新能源有限公司 | A kind of preparation process of the high-performance coating diaphragm of surface coating organic layer |
| CN110690048A (en) * | 2019-10-19 | 2020-01-14 | 益阳欧壹电子有限公司 | Preparation method of aluminum electrolytic capacitor |
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| CN104821381A (en) * | 2015-04-08 | 2015-08-05 | 陈静娟 | Preparation method of lithium ion battery diaphragm |
| US20200047133A1 (en) * | 2018-08-13 | 2020-02-13 | National Taiwan University | Porous membrane and method for filtering fluid including particles with porous membrane |
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| CN108183189A (en) * | 2017-12-07 | 2018-06-19 | 常州市沃兰特电子有限公司 | A kind of preparation method of high temp resistance lithium ion cell diaphragm |
| CN110148699A (en) * | 2019-06-12 | 2019-08-20 | 扬州中锂新能源有限公司 | A kind of preparation process of the high-performance coating diaphragm of surface coating organic layer |
| CN110690048A (en) * | 2019-10-19 | 2020-01-14 | 益阳欧壹电子有限公司 | Preparation method of aluminum electrolytic capacitor |
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