Manufacturing method of solid aluminum electrolytic capacitor capable of improving packaging effect

Abstract

The invention discloses a manufacturing method of a solid aluminum electrolytic capacitor capable of improving a packaging effect, which comprises the following steps of: nailing a guide pin on an anode aluminum foil and a cathode aluminum foil, separating the guide pin by using an isolating layer, winding the guide pin into a capacitor core, performing formation repair and drying on the core, immersing dispersion liquid in the core, and performing special treatment on the core, thereby obtaining the solid aluminum electrolytic capacitor with the improved packaging effect. And drying to form a conductive polymer, sleeving the core with a rubber plug, putting the core into an aluminum shell, sealing the aluminum shell, and finally carrying out aging and sorting to obtain the solid-state capacitor. The special treatment of the core refers to liquid absorption, air blowing and liquid re-absorption treatment of the core. According to the technical scheme, redundant dispersion liquid in the core can be effectively removed, so that the purpose of improving the packaging effect of the solid aluminum electrolytic capacitor is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of solid aluminum electrolytic capacitors, and in particular relates to a method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect. Background Art

[0002] With the popularization of mobile communications and the development of cloud services around the world, servers for wireless communication base stations and data centers must have large capacity and high speed performance; at the same time, the increase in load current and the increasingly harsh operating environment require general components including capacitors to have excellent performance stability, which is a big challenge for solid-state capacitors, especially large-size solid-state aluminum capacitor products.

[0003] When large-sized products are impregnated with dispersions with high viscosity, more dispersion will remain at the core and bottom of the capacitor core. After drying, more hard dispersions will appear at the bottom of the core. These residual dispersions will directly lead to a series of poor sealing phenomena such as excessive sealing height, skewed rubber plugs, and loose sealing. These defective products directly affect the packaging effect and packaging yield of the products. Therefore, how to remove the residual dispersion during impregnation is an urgent problem that practitioners need to solve. Summary of the invention

[0004] (1) Technical issues to be resolved

[0005] The object of the present invention is to provide a method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect, which can effectively remove excess dispersion in the core, thereby achieving the purpose of improving the packaging effect of the solid aluminum electrolytic capacitor.

[0006] (2) Technical solution

[0007] In order to achieve the above object, the present invention provides a method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect, the manufacturing method comprising the following steps: (1) Nail the guide pins to the anode and cathode aluminum foils, separate them with electrolytic paper, roll them into a core, and secure them with tape; (2) Immerse the core in the chemical solution and apply voltage to repair and dry it; (3) impregnating the core with the dispersion and subjecting the core to special treatment to form a conductive polymer after drying; (4) Put the rubber plug on the core, put it into the aluminum shell and seal it; (5) The sealed products are aged and sorted to form solid-state capacitors.

[0008] Preferably, in step ③, the special treatment of the core is divided into three steps.

[0009] Preferably, in step ③, the three steps are to use electrolytic paper to absorb liquid at the bottom of the core, use a blowing device to blow air to the core at a specific position, and then use electrolytic paper to absorb liquid at the bottom of the core again.

[0010] Preferably, in step ③, the specific position of the blowing device is the core winding core.

[0011] Preferably, in step ③, the blowing pressure ranges from 0.1 to 2 MPa.

[0012] Preferably, in step ③, the blowing time is 2 to 600 seconds.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The manufacturing method of the solid aluminum electrolytic capacitor with improved packaging effect of the present invention can remove most of the dispersion liquid at the bottom of the core and part of the winding core by bottom liquid suction, and then the winding core is blown by a blowing device to remove the dispersion liquid remaining at the winding core, and then the bottom liquid suction method is used again to completely remove the small amount of dispersion liquid remaining in the core and the small amount of dispersion liquid adsorbed at the bottom winding core position during blowing, so that the dispersion liquid remaining during impregnation can be completely removed, thereby achieving the purpose of improving the packaging effect of the solid aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for describing the specific implementation or the prior art are briefly introduced below. Obviously, the drawings described below are only one implementation of the present invention. For ordinary technicians in this field, other similar drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of step 1 of the solid aluminum electrolytic capacitor with improved packaging effect of the present invention, that is, liquid absorption at the bottom of the electrolytic paper.

[0018] Figure 2 This is a schematic diagram of blowing air onto the winding core in step 2 of a solid aluminum electrolytic capacitor with improved packaging effect according to the present invention.

[0019] Figure 3 This is a schematic diagram of step three of the solid aluminum electrolytic capacitor with improved packaging effect of the present invention, which is to use electrolytic paper to absorb liquid from the bottom of the core after blowing.

[0020] The markings in the attached figure are: 1-winding core, 2-capacitor core, 3-electrolytic paper, 4-head of the blowing device, 5-winding core after blowing (there is no dispersion liquid at the winding core). DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the technical scheme in the specific implementation mode of the present invention is clearly and completely described below to further illustrate the present invention. Obviously, the specific implementation mode described is only a part of the implementation mode of the present invention, rather than all styles.

[0022] Example 1

[0023] This specific implementation is a method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect, the basic model of which is 63V1800μFΦ18×40, and the specific steps are as follows: (1) Pin the guide pins to the anode foil and cathode foil, separate them with an isolation layer, and wind them into a core, and secure them with tape; (2) Immerse the core in the chemical solution and apply voltage to repair and dry it; (3) The core is impregnated with the dispersion, and the liquid is absorbed at the bottom of the core using electrolytic paper for 5 minutes. The core is blown with air at a pressure of 0.2 MPa for 10 seconds, and then the liquid is absorbed at the bottom of the core using electrolytic paper again for 5 minutes. After drying at 125°C, a conductive polymer is formed; (4) Put the rubber plug on the core, put it into the aluminum shell and seal it; (5) The sealed products are aged and sorted to finally obtain the finished capacitor products.

[0024] Example 2

[0025] The difference from Example 1 is that the core is subjected to a blowing treatment with an air pressure of 0.4 MPa and a time of 20 seconds.

[0026] Example 3

[0027] The difference from Example 1 is that the core is subjected to a blowing treatment with an air pressure of 0.6 MPa and a time of 30 seconds.

[0028] Example 4

[0029] The difference from Example 1 is that the core is subjected to a blowing treatment with an air pressure of 1.0 MPa and a time of 60 seconds.

[0030] Comparative Example 1

[0031] The difference from Example 1 is that the step of electrolytic paper absorbing liquid at the bottom of the core is not performed.

[0032] Comparative Example 2

[0033] The difference from Example 1 is that the core is subjected to a blowing treatment with an air pressure of 0.05 MPa and a time of 10 s.

[0034] Comparative Example 3

[0035] The difference from Example 1 is that the core is subjected to a blowing treatment with an air pressure of 0.2 MPa and a time of 1 s.

[0036] Comparative Example 4

[0037] The difference from Example 1 is that the step of the electrolytic paper absorbing liquid at the bottom of the core after blowing is not performed.

[0038] In order to verify the advantages of the capacitors manufactured by the manufacturing method of the present invention, the applicant used a 20x magnifying glass to observe the appearance of 100 capacitors after packaging, and counted their packaging defective rate. The specific results are shown in the following table:

[0039] Table 1 Test results of various embodiments and comparative examples

[0040]

[0041] Note: “Y” means this step needs to be performed; “−” means this step does not need to be performed.

[0042] As can be seen from Table 1, compared with the capacitors prepared by comparative examples 1 and 4, the embodiments of the manufacturing method of the present invention perform a total of one liquid absorption step at the bottom of the core, and the dispersion at the bottom of the core cannot be completely removed, thereby affecting the packaging yield and packaging effect of the product.

[0043] Compared with the capacitors prepared by the embodiments of the manufacturing method of the present invention and comparative examples 2 and 3, the air pressure of the blowing is too low, the blowing time is too short, and the dispersion at the core of the core cannot be completely removed. Therefore, in the subsequent drying process, due to the increase in temperature and the decrease in the viscosity of the dispersion, the dispersion remaining on the core will flow to the bottom of the core. After the dispersion is solidified, it will remain at the bottom of the core, thereby affecting the packaging yield and packaging effect of the product.

[0044] In summary, the bottom of the core is used for liquid absorption, air blowing and re-liquid absorption. This technical solution can effectively remove the excess dispersion liquid in the core, thereby achieving the purpose of improving the packaging effect of the solid aluminum electrolytic capacitor.

[0045] The above describes the specific embodiments of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary specific embodiments, and the present invention can be implemented in other specific forms without departing from the concept or basic characteristics of the present invention. Therefore, no matter from which point of view, the above specific embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0046] In addition, it should be understood that although the present specification is described according to various implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect, characterized in that The following steps are involved: (1) Nail the guide pins to the anode and cathode aluminum foils, separate them with electrolytic paper, roll them into a core, and secure them with tape; (2) Immerse the core in the chemical solution and apply voltage to repair and dry it; (3) impregnating the core with the dispersion and subjecting the core to special treatment to form a conductive polymer after drying; (4) Put the rubber plug on the core, put it into the aluminum shell and seal it; (5) The sealed products are aged and sorted to form solid-state capacitors.

2. The method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect according to claim 1, characterized in that: In the step (3), the special treatment of the core is divided into three steps.

3. The method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect according to claim 2, characterized in that: The three steps are to use electrolytic paper to absorb liquid at the bottom of the core, use a blowing device to blow air to the core at a specific position, and then use electrolytic paper to absorb liquid at the bottom of the core again.

4. The method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect according to claim 3, characterized in that: The specific position for blowing air is the core winding core.

5. The method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect according to claim 1, characterized in that: In the step (3), the blowing pressure ranges from 0.1 to 2 MPa.

6. The method for manufacturing a solid aluminum electrolytic capacitor with improved packaging effect according to claim 1, characterized in that: In the step (3), the blowing time is 2 to 600 seconds.

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