CN119811901A - Aluminum wire type polymer capacitor and preparation method thereof - Google Patents
Aluminum wire type polymer capacitor and preparation method thereof Download PDFInfo
- Publication number
- CN119811901A CN119811901A CN202510017585.6A CN202510017585A CN119811901A CN 119811901 A CN119811901 A CN 119811901A CN 202510017585 A CN202510017585 A CN 202510017585A CN 119811901 A CN119811901 A CN 119811901A
- Authority
- CN
- China
- Prior art keywords
- aluminum wire
- stacked
- aluminum
- conductive plate
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
本发明公开了一种铝线型高分子电容器，其包括壳体和电容器主体；所述电容器主体包括堆叠铝线结构和导电板，所述导电板包括阳极导电板和阴极导电板，所述堆叠铝线结构设有阳极区和阴极区，所述堆叠铝线结构的阳极区与阳极导电板固定连接，所述堆叠铝线结构的阴极区与阴极导电板固定连接；所述堆叠铝线结构由1个以上堆叠铝线单元组成；所述堆叠铝线单元由若干并联的铝丝组成。通过设置堆叠铝线结构，替代传统的叠层电容器的铝箔结构，在保证电容器较小的体积和等效串联电阻前提下，大大提升了电容器的容量和耐波纹电流能力。
The present invention discloses an aluminum wire type polymer capacitor, which includes a shell and a capacitor body; the capacitor body includes a stacked aluminum wire structure and a conductive plate, the conductive plate includes an anode conductive plate and a cathode conductive plate, the stacked aluminum wire structure is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire structure is fixedly connected to the anode conductive plate, and the cathode region of the stacked aluminum wire structure is fixedly connected to the cathode conductive plate; the stacked aluminum wire structure is composed of more than one stacked aluminum wire unit; the stacked aluminum wire unit is composed of a plurality of parallel aluminum wires. By providing a stacked aluminum wire structure to replace the aluminum foil structure of a traditional stacked capacitor, the capacity and ripple current resistance of the capacitor are greatly improved under the premise of ensuring a small volume and equivalent series resistance of the capacitor.
Description
Technical Field
The invention relates to the technical field of aluminum electrolytic capacitors, in particular to an aluminum wire type high polymer capacitor and a preparation method thereof.
Background
The conductive polymer laminated aluminum capacitor is used as a novel aluminum capacitor, a conductive high polymer is used as an electrolyte, a multi-layer core parallel combination and epoxy resin encapsulation curing patch type structural design is adopted, and compared with the traditional aluminum electrolytic capacitor, the conductive polymer laminated aluminum capacitor has the excellent performances of small volume, small leakage current, long service life, good storage stability and the like. However, with increasing performance requirements of electronic products, the existing conductive polymer aluminum capacitor has gradually revealed defects in terms of capacity and equivalent series resistance, and particularly in a working environment with high frequency and high current, the requirement of reducing the equivalent series resistance is simultaneously required to improve power efficiency and ensure system stability when higher requirements are put forward on the capacity of the capacitor.
The invention patent 201711151480.1 discloses a laminated capacitor which comprises a plurality of laminated monomers, a positive electrode leading-out terminal and a negative electrode leading-out terminal which are electrically connected to the monomers, wherein each single piece comprises a positive electrode end, a negative electrode end and a shielding rubber line positioned between the positive electrode end and the negative electrode end, the negative electrode ends of the single pieces are connected together and are connected with the negative electrode leading-out terminal, the positive electrode ends of the single pieces are connected together and are connected with the positive electrode leading-out terminal, the negative electrode ends of the single pieces comprise a dielectric film, a solid electrolyte layer, a carbon paste layer and a silver paste layer which are sequentially coated on the surface of a positive electrode foil, the outer surfaces of the single pieces are packaged with insulating resin layers, and the laminated capacitor further comprises an anti-vulcanization protection frame which is arranged close to the negative electrode leading-out terminal and used for preventing sulfur and sulfide in air from contacting with the silver paste layer. Said invention is good in antisulfide effect, but the high-molecular capacitor with said structure is small in capacity, and its equivalent series resistance is large, so that it can not meet the requirements for high-current working environment.
Therefore, there is an urgent need to find a technical solution to achieve further improvement of the capacity of the polymer capacitor while reducing the equivalent series resistance of the capacitor.
Disclosure of Invention
Accordingly, it is necessary to provide an aluminum wire type polymer capacitor having a stable structure, high impact resistance and a large capacity against the above-mentioned problems.
In order to solve the technical problems, the invention provides an aluminum wire type high polymer capacitor and a preparation method thereof, which adopts the following technical scheme:
The first aspect of the present invention provides an aluminum wire type polymer capacitor, which comprises a shell and a capacitor main body;
The capacitor body comprises a stacked aluminum wire structure and a conductive plate, wherein the conductive plate comprises an anode conductive plate and a cathode conductive plate, the stacked aluminum wire structure is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire structure is fixedly connected with the anode conductive plate, and the cathode region of the stacked aluminum wire structure is fixedly connected with the cathode conductive plate;
The stacked aluminum wire structure consists of more than 1 stacked aluminum wire unit, and the stacked aluminum wire unit consists of a plurality of aluminum wires which are connected in parallel.
Further, the stacked aluminum wire structure is composed of a plurality of stacked aluminum wire units, the stacked aluminum wire units are arranged on the front side and the back side of the conducting plate, and the number of the stacked aluminum wire units on the front side and the back side of the conducting plate is the same.
Further, the stacked aluminum wire structure is composed of a first stacked aluminum wire unit and a second stacked aluminum wire unit, wherein the first stacked aluminum wire unit and the second stacked aluminum wire unit are arranged on the front side and the back side of the conductive plate and form a sandwich structure with the conductive plate.
Further, the stacked aluminum wire unit is composed of more than 1 layer of parallel aluminum wires, and each layer of aluminum wires are transversely arranged.
Further, the number of layers and the arrangement mode of the aluminum wires arranged in each stacked aluminum wire unit are the same.
Further, when each layer of aluminum wires are transversely arranged, heat dissipation intervals are reserved among the aluminum wires, and the heat dissipation intervals are 0.2 mm-0.4 mm.
Further, the aluminum purity of the aluminum wire is more than or equal to 99.7%, and the diameter of the aluminum wire is 1 mm-3 mm.
Further, the conducting plate comprises an anode conducting plate and a cathode conducting plate which are vertically arranged, the stacked aluminum wire unit is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire unit is welded on the anode conducting plate, and the cathode region of the stacked aluminum wire unit is fixedly adhered on the cathode conducting plate.
Further, a conductive polymer layer, a graphite layer and a silver paste layer are sequentially arranged in the cathode region of the aluminum wire from inside to outside.
The second aspect of the invention provides a method for preparing an aluminum wire type polymer capacitor, which comprises the following steps:
S1, preparing aluminum wires, and coating insulating glue at the same height of each aluminum wire to form an insulating glue layer, wherein the long end of each aluminum wire is distinguished to be a cathode region, and the short end is distinguished to be an anode region;
s2, sequentially forming a conductive polymer layer, a graphite layer and a silver paste layer in the cathode region of the aluminum wire;
S3, aligning anode areas and cathode areas of a plurality of aluminum wires, transversely forming a single-layer aluminum wire side by side, sequentially stacking a plurality of layers of aluminum wires on the front side and the back side of the conducting plate to form a stacked aluminum wire unit, mutually bonding the cathode areas of the aluminum wires of all layers and the cathode areas and the common cathode areas of the aluminum wires through silver paste layers, and mutually welding and fixing the anode areas of the aluminum wires of all layers and the anode areas and the common anode areas of the aluminum wires;
S4, winding the insulating tape on the outer sides of the stacked aluminum wire units on the front side and the back side of the common anode region, and filling an insulating coating in a gap between the insulating tape and the anode region of the stacked aluminum wire unit to form a capacitor main body;
And S5, packaging the capacitor body.
Compared with the prior art, the invention has the following beneficial effects:
According to the aluminum wire type high polymer capacitor, the stacked aluminum wire structure is arranged to replace an aluminum foil structure of a traditional stacked capacitor, the capacity and ripple current resistance of the capacitor are greatly improved on the premise that the smaller volume and equivalent series resistance of the capacitor are guaranteed, the anode region of the stacked aluminum wire structure is fixed in an auxiliary mode through the insulating tape, the cathode region of the stacked aluminum wire structure is fixed in an auxiliary mode through the fixed pin structure of the cathode conducting plate, the vibration resistance of the overall structure of the capacitor is improved, and the risk of failure of the capacitor in the packaging and practical processes is reduced.
Drawings
In order to more clearly illustrate the application or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the application and that other drawings can be obtained from them without the inventive effort of a person skilled in the art.
FIG. 1 is a schematic diagram of an aluminum linear polymer capacitor according to the present invention;
FIG. 2 is a schematic diagram of the structure of the capacitor body of the aluminum linear polymer capacitor according to the present invention;
FIG. 3 is a schematic structural view of an anode conductive plate of the aluminum linear polymer capacitor of the present invention;
FIG. 4 is a schematic structural view of a cathode conductive plate of the aluminum linear polymer capacitor according to the present invention;
FIG. 5 is a schematic diagram of a stacked aluminum wire unit of the aluminum linear polymer capacitor according to the present invention;
FIG. 6 is a schematic structural diagram of an aluminum wire of the aluminum linear polymer capacitor of the present invention;
fig. 7 is a schematic diagram of an aluminum wire type polymer capacitor according to embodiment 6 of the present invention;
Fig. 8 is an exploded view of an aluminum wire type polymer capacitor according to embodiment 6 of the present invention.
Reference numerals illustrate:
A housing 1, an upper package 11, and a lower package 12;
Cathode conductive plate 2, common cathode region 21, first fixing leg 22, second fixing leg 23, cathode leg 24;
A stacked aluminum wire structure 3, a first stacked aluminum wire unit 31, a second stacked aluminum wire unit 32, a third stacked aluminum wire unit 33, a fourth stacked aluminum wire unit 34, a fifth stacked aluminum wire unit 35, and a sixth stacked aluminum wire unit 36;
aluminum wire 301, insulating coating 3011, insulating adhesive layer 3012, conductive polymer layer 3013, graphite layer 3014, silver paste layer 3015, silver paste layer 3016;
An anode conductive plate 4, a common anode region 41, and an anode pin 42;
and an insulating tape 5.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In order to make the person skilled in the art better understand the solution of the present application, the technical solution of the embodiment of the present application will be clearly and completely described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 6, the present embodiment provides an aluminum wire type polymer capacitor, which includes a housing 1 and a capacitor body, wherein the housing 1 includes an upper package 11 and a lower package 12, the capacitor body is disposed in a cavity formed by the upper package 1 and the lower package 2, and a lead structure is led out from the capacitor body to the outside of the lower package 2, and is soldered with an external circuit board to form an electrical connection.
Further, the capacitor body includes a stacked aluminum wire structure 3 and a conductive plate, as shown in fig. 3-4, the conductive plate includes an anode conductive plate 4 and a cathode conductive plate 2 arranged vertically, the stacked aluminum wire structure 3 is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire structure 3 is welded on the anode conductive plate 4, and the cathode region of the stacked aluminum wire structure 3 is bonded on the cathode conductive plate 2.
The stacked aluminum wire structure 3 is composed of 1 or more stacked aluminum wire units, and each stacked aluminum wire unit is provided with an anode region and a cathode region at the same position.
Specifically, in this embodiment, the stacked aluminum wire structure 3 is composed of a first stacked aluminum wire unit 31 and a second stacked aluminum wire unit 32, where the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are respectively disposed on the front and the back of the conductive plate, and form a sandwich structure with the conductive plate.
Further, anode regions of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are welded on the front and back sides of the anode conductive plate 4, respectively, and cathode regions of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are adhered and fixed on the front and back sides of the cathode conductive plate 2, respectively.
Further, the pin structure includes an anode pin 42 and a cathode pin 24, the anode pin 42 being led out from the anode conductive plate 4, and the cathode pin 24 being led out from the cathode conductive plate 2.
Specifically, the anode conductive plate 4 includes a sheet-shaped common anode region 41 and an anode pin 42 led out from the middle of the upper end of the common anode region 41 to the package can 2, and the anode regions of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are welded to the front and back surfaces of the common anode region 41, respectively.
Further, the anode pin 42 penetrates from the lower package 2 and is bent toward the inside of the capacitor, and is soldered to an external circuit board.
Specifically, the cathode conductive plate 2 includes a sheet-shaped common cathode region 21 and a cathode lead 24 led out from the middle of the lower end of the common cathode region 21 to the package 2, the cathode regions of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are respectively bonded to the front and back surfaces of the common cathode region 21, and the cathode lead 24 penetrates from the package 2 and is bent toward the inside of the capacitor, and is soldered to the external circuit board.
Further, the cathode conductive plate 2 further includes a fixing leg structure for assisting the stacked aluminum wire structure 3 to prevent the stacked aluminum wire structure 3 from loosening. The fixed leg structure comprises a first fixed leg 22 and a second fixed leg 23 which are arranged on the front side and the back side of the common cathode region 21, and the first fixed leg 22 and the second fixed leg 23 are side L-shaped fixed legs.
Specifically, the first fixing leg 22 extends toward the front side of the common cathode region 21 after being led out from one side of the common cathode region 21 and then is bent toward the other side of the led-out side for fixing the first stacked aluminum wire unit 31 on the front side of the common cathode region 324, and the second fixing leg 23 extends toward the opposite side of the common cathode region 21 after being led out from the side corresponding to the led-out side of the first fixing leg 22 and then is bent toward the led-out side of the first fixing leg 22 for fixing the second stacked aluminum wire unit 32 on the opposite side of the common cathode region 324. Thereby, the first fixing leg 22 and the second fixing leg 23 simultaneously fix the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 on the front and rear sides of the common cathode region 21, effectively improving vibration resistance of the overall structure.
Further, in this embodiment, the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 have the same structure and each include a plurality of parallel aluminum wires 301, the aluminum wires 301 are divided into a plurality of layers, which are sequentially stacked in parallel, and each layer is laterally provided with a plurality of aluminum wires 301 of equal number. The first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are each provided with 2 layers of aluminum wires 301, each layer being provided with 13 aluminum wires 301 laterally side by side.
Further, each aluminum wire 301 is provided with an anode region and a cathode region at the same position, the anode regions of the aluminum wires 301 of each layer and the anode region and the common anode region 41 of the aluminum wires 301 are welded with each other, and the cathode regions of the aluminum wires 301 of each layer and the cathode region and the common cathode region 21 of the aluminum wires 301 are adhered with each other.
Further, as shown in fig. 5 to 6, the aluminum wire 301 is provided with an insulating adhesive layer 3012, and the anode area and the cathode area of the aluminum wire 301 are distinguished by the insulating adhesive layer 3012, specifically, after the middle-upper section of the aluminum wire 301 is coated with the insulating adhesive layer 3012, the shorter end of the aluminum wire 301 is the anode area, the longer end is the cathode area, and the position sizes of the anode area and the cathode area of each aluminum wire 301 are the same. Further, the anode region of the aluminum wire 301 is welded to the common anode region 41, and the other surfaces of the anode region of the aluminum wire 301 except the welding position are coated with an insulating coating 3011. Further, the cathode region of the aluminum wire 301 is sequentially provided with a conductive polymer layer 3013, a graphite layer 3014 and a silver paste layer 3015 from inside to outside, and finally the cathode region of the aluminum wire 301 is adhered to the common cathode region 21 through a silver paste layer 3016.
Further, the anode region of the stacked aluminum wire structure 3 is further sleeved with an insulating tape 5 for assisting in fixing the stacked aluminum wire structure 3, and preventing the anode welding part from loosening in the use process.
The preparation method of the aluminum wire type high polymer capacitor provided by the embodiment comprises the following steps:
S1, preparing an aluminum wire 301, heating an aluminum ingot with the purity of more than or equal to 99.7% to a molten state, converting the aluminum ingot into liquid aluminum, and then injecting the liquid aluminum into a preset die by adopting a die casting method. After the aluminum wire is cooled and solidified, a cylindrical aluminum blank is obtained, the aluminum blank is reheated to a proper temperature, the aluminum blank is gradually thinned through a stretching process to form a linear aluminum wire, the diameter of the linear aluminum wire is 1 mm-3 mm, the linear aluminum wire is cut into an aluminum wire 301 with the length of 6.0-7.0 mm, the manufactured aluminum wire 301 is subjected to cleaning and chemical etching treatment, a layer of aluminum oxide film is formed on the surface of the aluminum wire after holes are formed, the effective area of the aluminum wire is increased, the storable charge capacity of the aluminum wire is also increased, and accordingly the capacity of the aluminum wire is larger;
S2, uniformly coating a layer of insulating glue at the height of 5.0 mm-5.2 mm at one end of the high-purity aluminum wire 301 to form an insulating glue layer 3012, wherein the long end of the high-purity aluminum wire 301 is distinguished to be a cathode area, and the short end of the high-purity aluminum wire 301 is distinguished to be an anode area;
S3, placing the cathode region of the high-purity aluminum wire 301 into a conductive polymer material, forming a uniform conductive polymer layer 3013 in the cathode region of the aluminum wire 301, sequentially placing the cathode region of the aluminum wire 301 covered with the conductive polymer layer 3013 into graphite and silver paste, and sequentially forming a graphite layer 3014 and a silver paste layer 3015 on the surface of the cathode region;
S4, aligning anode areas and cathode areas of 3 aluminum wires, transversely forming single-layer aluminum wires 301 side by side, stacking 2 layers of aluminum wires 301 on the front and back sides of a common anode area 41 and a common cathode area 21 in sequence, bonding the cathode areas of the aluminum wires 301 and the common cathode area 21 with each other through silver paste layers 3016, and mutually welding and fixing the anode areas of the aluminum wires 301 and the anode areas and the common anode areas 41 of the aluminum wires 301;
S5, winding the insulating tape 5 on the outer sides of the stacked aluminum wire structures 3 on the front side and the back side of the common anode region 41, further fixing the stacked aluminum wire structures 3, and filling an insulating coating 3011 in a gap between the insulating tape 5 and the anode region of the stacked aluminum wire structures 3 to form a capacitor main body;
And S6, finally, packaging the capacitor body in the upper packaging shell 1 and the lower packaging shell 2 by using a packaging technology, and leading out an anode pin 42 and a cathode pin 24 from the lower packaging shell 2 by the upper end of the anode conducting plate 4 and the lower end of the cathode conducting plate 2 respectively.
Example 2
The difference between the present embodiment and embodiment 1 is that when each layer of aluminum wires 301 of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are arranged laterally, a heat dissipation space is reserved between the aluminum wires 301, and the heat dissipation space is 0.2 mm-0.4 mm.
In order to achieve the structure, the preparation method of the aluminum wire type polymer capacitor is different from the preparation method of the embodiment 1 in that the upper layer aluminum wire 301 and the lower layer aluminum wire 301 are respectively taken to form a group, cathode areas among the aluminum wires 301 in each group are mutually bonded through silver paste layers 3016, anode areas among the aluminum wires 301 in each group are welded and fixed, the aluminum wires 301 in each group are separated by the heat dissipation interval, the cathode areas among the aluminum wires 301 in each group are mutually bonded through silver paste layers 3016, insulating tapes 5 are used for sequentially separating and winding the aluminum wires 301 in each group at the front side and the back side at uniform tension from the junction area of the insulating adhesive layers 3012 and the anode areas, welding areas are reserved during winding, and then the anode areas among the aluminum wires 301 in each group and the common anode areas 41 are mutually welded and fixed, wherein insulating tapes 5 and gaps among the anode areas of the aluminum wires 301 are filled with insulating coatings 3011.
In this step, because the heat dissipation interval is reserved and the welding may increase the difficulty, the welding stability is increased by using the welding mode after crimping, so that the parallel connection mainly depends on the connection of the aluminum wires in the anode region and the cathode region, the distance is not too large, the fixing property of the aluminum wires is good, and the parallel connection among the aluminum wires is not directly influenced.
Example 3
The present embodiment proposes an aluminum wire type polymer capacitor differing from embodiment 1 only in that the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 of the front and back sides of the common cathode region 21 and the common anode region 41 are each provided with 4 layers of aluminum wires 301, and 2 aluminum wires 301 are arranged side by side per layer.
Example 4
The present embodiment proposes an aluminum wire type polymer capacitor differing from embodiment 1 only in that the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 of the front and back sides of the common cathode region 21 and the common anode region 41 are each provided with 1 layer of aluminum wires 301, and 4 aluminum wires 301 are arranged side by side per layer.
Example 5
The present embodiment proposes an aluminum wire type polymer capacitor, which is different from embodiment 1 in that a first stacked aluminum wire unit 31 is provided only on the front sides of the common cathode region 21 and the common anode region 41, the first stacked aluminum wire unit 31 is provided with 2 layers of aluminum wires 301, and 13 aluminum wires 301 are provided side by side per layer. The fixing leg structure in this embodiment is provided with only the first fixing leg 22 on the front side of the common cathode region 21 for wrapping and fixing the first stacked aluminum wire unit 31.
Example 6
The difference between the aluminum wire type polymer capacitor according to the present embodiment and the embodiment 1 is that, as shown in fig. 7 to 8, a first stacked aluminum wire unit 31, a third stacked aluminum wire unit 33 and a fifth stacked aluminum wire unit 35 are disposed on the front sides of the common cathode region 21 and the common anode region 41, a second stacked aluminum wire unit 32, a fourth stacked aluminum wire unit 34 and a sixth stacked aluminum wire unit 36 are disposed on the back sides of the common cathode region 21 and the common anode region 41, 2 layers of aluminum wires 301 are disposed on each of the stacked aluminum wire units, and 13 aluminum wires 301 are disposed in parallel in the lateral direction of each layer.
The first fixing leg 22 extends towards the front surface of the common cathode region 21 after being led out from one side of the common cathode region 21 and is bent towards the other side of the leading-out side, so that the first stacked aluminum wire unit 31, the third stacked aluminum wire unit 33 and the fifth stacked aluminum wire unit 35 which fix the front surface of the common cathode region 324 are wrapped and fixed, and the second fixing leg 23 extends towards the back surface of the common cathode region 21 after being led out from the side corresponding to the leading-out side of the first fixing leg 22 and is bent towards the leading-out side of the first fixing leg 22, so that the second stacked aluminum wire unit 32, the fourth stacked aluminum wire unit 34 and the sixth stacked aluminum wire unit 36 on the back surface of the common cathode region 324 are wrapped and fixed.
The capacitance capacity increases mainly according to the increase of the total area of the electrode, that is, the total area of the aluminum wire, with the same material. As the stacked aluminum wire units increase, more current paths may also be provided, thereby reducing the current density on each path and reducing the resistance, so the more stacked aluminum wire units, the greater the capacity of the capacitor and the lower the ESR. Compared with the structure that the aluminum wires with the same number of layers are arranged into a single stacked aluminum wire unit, the stacked aluminum wire unit structure is more stable in the embodiment, and when the stacked aluminum wire unit structure is impacted, the connection point of the aluminum wires and the common anode region is not easy to break.
TABLE 1 EXAMPLES 1 to 6 stacked aluminum wire cell arrangement
Comparative example 1
This comparative example proposes an aluminum foil polymeric multilayer capacitor which is different from the aluminum wire polymeric capacitor of example 1 in that the aluminum wire 301 in parallel with a single layer in example 1 is replaced with a conventional aluminum foil.
The preparation method of the aluminum foil high polymer laminated capacitor provided by the comparative example comprises the following steps of integrating 4 aluminum foils into a unit in a mode of parallel connection of anodes and parallel connection of cathodes, setting the length and width of each aluminum foil to be the same as the length and width of each layer of 3 aluminum wires after being arranged side by side in the embodiment 1, and respectively leading out conductive pins from the common anode end and the common cathode end. After assembly, the entire stacked capacitive semifinished product is converted into a rectangular-shaped capacitor using packaging techniques.
Comparative example 2
This comparative example proposes an aluminum wire type polymer capacitor differing from embodiment 2 only in that, when each layer of aluminum wires 301 of the first stacked aluminum wire unit 31 and the second stacked aluminum wire unit 32 are laterally arranged, a heat dissipation interval of 0.5mm is reserved between the aluminum wires 301.
100 Capacitors of examples 1 to 6 and comparative examples 1 to 2 were tested, and the performance test results are shown in table 2 below:
TABLE 2 Performance test results of the capacitors prepared by the methods described in examples 1-6 and comparative examples 1-2
| Scheme for the production of a semiconductor device | Capacity (mu F) | Initial ESR (mΩ) | Post reflow ESR (mΩ) | Leakage current yield (%) |
| Example 1 | 581.0 | 3.4 | 3.9 | 70% |
| Example 2 | 573.6 | 3.8 | 4.5 | 75% |
| Example 3 | 614.3 | 3.5 | 4.0 | 68% |
| Example 4 | 528.8 | 4.0 | 4.2 | 74% |
| Example 5 | 593.3 | 3.5 | 3.9 | 78% |
| Example 6 | 866.4 | 3.2 | 3.6 | 70% |
| Comparative example 1 | 420.1 | 4.7 | 5.4 | 65% |
| Comparative example 2 | 568.5 | 4.6 | 5.2 | 69% |
From the test data in table 2, it can be seen that the aluminum wire type polymer capacitor prepared by the method of examples 1 to 6 has significantly improved capacity and significantly reduced ESR compared with the laminated capacitor prepared by the conventional method in comparative example 1, and the leakage current qualification rate of example 2 is significantly improved compared with example 1 due to the provision of the heat dissipation gap, and the heat dissipation gap is continuously increased to 0.5mm compared with example 2, so that the heat dissipation performance of the capacitor can be enhanced, but the ESR is increased simultaneously, and the shock resistance of the whole structure is also reduced.
It is apparent that the above-described embodiments are only some embodiments of the present application, but not all embodiments, and the preferred embodiments of the present application are shown in the drawings, which do not limit the scope of the patent claims. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the scope of the application.
Claims (10)
1. An aluminum wire type polymer capacitor is characterized by comprising a shell (1) and a capacitor main body;
the capacitor body comprises a stacked aluminum wire structure (3) and a conductive plate, wherein the conductive plate comprises an anode conductive plate (4) and a cathode conductive plate (2), the stacked aluminum wire structure (3) is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire structure (3) is fixedly connected with the anode conductive plate (4), and the cathode region of the stacked aluminum wire structure (3) is fixedly connected with the cathode conductive plate (2);
the stacked aluminum wire structure (3) is composed of more than 1 stacked aluminum wire units, and each stacked aluminum wire unit is composed of a plurality of aluminum wires (301) which are connected in parallel.
2. The aluminum wire type polymer capacitor according to claim 1, wherein the stacked aluminum wire structure (3) is composed of a plurality of stacked aluminum wire units, the plurality of stacked aluminum wire units are arranged on the front side and the back side of the conductive plate, and the number of the stacked aluminum wire units on the front side and the back side of the conductive plate is the same.
3. The aluminum wire type polymer capacitor according to claim 2, wherein the stacked aluminum wire structure (3) is composed of a first stacked aluminum wire unit (31) and a second stacked aluminum wire unit (32), and the first stacked aluminum wire unit (31) and the second stacked aluminum wire unit (32) are arranged on the front side and the back side of the conductive plate and form a sandwich structure with the conductive plate.
4. The aluminum wire type polymer capacitor according to claim 2, wherein the stacked aluminum wire unit is composed of 1 or more layers of parallel aluminum wires (301), and each layer of aluminum wires (301) is arranged laterally.
5. The aluminum wire type polymer capacitor according to claim 4, wherein the number of layers and arrangement of aluminum wires (301) provided for each of the stacked aluminum wire units are the same.
6. The aluminum wire type polymer capacitor according to claim 4, wherein when each layer of aluminum wires (301) is transversely arranged, heat dissipation distances are reserved among the aluminum wires (301), and the heat dissipation distances are 0.2 mm-0.4 mm.
7. The aluminum wire type polymer capacitor according to claim 1, wherein the aluminum purity of the aluminum wire (301) is not less than 99.7%, and the diameter of the aluminum wire (301) is 1mm to 3mm.
8. The aluminum wire type polymer capacitor according to claim 2, wherein the conductive plate comprises an anode conductive plate (4) and a cathode conductive plate (2) which are vertically arranged, the stacked aluminum wire unit is provided with an anode region and a cathode region, the anode region of the stacked aluminum wire unit is welded on the anode conductive plate (4), and the cathode region of the stacked aluminum wire unit is adhered and fixed on the cathode conductive plate (2).
9. The aluminum wire type polymer capacitor according to claim 1, wherein the cathode region of the aluminum wire (301) is provided with a conductive polymer layer (3013), a graphite layer (3014) and a silver paste layer (3015) in order from inside to outside.
10. The preparation method of the aluminum wire type high polymer capacitor is characterized by comprising the following steps of:
S1, preparing aluminum wires (301), and coating insulating glue at the same height of each aluminum wire (301) to form an insulating glue layer (3012), wherein the long end of each aluminum wire (301) is distinguished to be a cathode region, and the short end is distinguished to be an anode region;
s2, sequentially forming a conductive polymer layer (3013), a graphite layer (3014) and a silver paste layer (3015) in a cathode region of an aluminum wire (301);
S3, aligning anode areas and cathode areas of a plurality of aluminum wires (301) to form single-layer aluminum wires (301) transversely side by side, sequentially stacking a plurality of layers of aluminum wires (301) on the front side and the back side of a conductive plate to form a stacked aluminum wire unit, bonding the cathode areas of the layers of aluminum wires (301) and the cathode areas of the aluminum wires (301) and the common cathode area (21) with each other through silver paste layers (3016), and welding and fixing the anode areas of the layers of aluminum wires (301) and the anode areas of the aluminum wires (301) and the common anode areas (41) with each other;
S4, winding an insulating tape (5) on the outer sides of the stacked aluminum wire units on the front side and the back side of the common anode region (41), and filling an insulating coating (3011) in a gap between the insulating tape (5) and the anode region of the stacked aluminum wire unit to form a capacitor main body;
And S5, packaging the capacitor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510017585.6A CN119811901B (en) | 2025-01-06 | 2025-01-06 | Aluminum wire type high polymer capacitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510017585.6A CN119811901B (en) | 2025-01-06 | 2025-01-06 | Aluminum wire type high polymer capacitor and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119811901A true CN119811901A (en) | 2025-04-11 |
| CN119811901B CN119811901B (en) | 2026-01-09 |
Family
ID=95276196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510017585.6A Active CN119811901B (en) | 2025-01-06 | 2025-01-06 | Aluminum wire type high polymer capacitor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119811901B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5377073A (en) * | 1992-01-27 | 1994-12-27 | Nec Corporation | Stacked type solid electrolytic capacitor |
| JPH1092695A (en) * | 1996-09-11 | 1998-04-10 | Matsushita Electric Ind Co Ltd | Chip-shaped solid electrolytic capacitor and manufacturing method thereof |
| CN1243325A (en) * | 1998-06-19 | 2000-02-02 | 松下电器产业株式会社 | Electrolytic capacitor, its anode body and production method thereof |
| JP2000228213A (en) * | 1999-02-04 | 2000-08-15 | Fuji Electric Co Ltd | Energy storage element and method of manufacturing the same |
| JP2008177200A (en) * | 2007-01-16 | 2008-07-31 | Matsushita Electric Ind Co Ltd | Solid electrolytic capacitor |
| JP2008177198A (en) * | 2007-01-16 | 2008-07-31 | Matsushita Electric Ind Co Ltd | Electrolytic capacitor |
| US20110254132A1 (en) * | 2009-07-02 | 2011-10-20 | Taiwan Semiconductor Manufacturing Company, Ltd. | Vertical interdigitated semiconductor capacitor |
| JP2012069631A (en) * | 2010-09-22 | 2012-04-05 | Sanyo Electric Co Ltd | Electrolytic capacitor |
| CN104319105A (en) * | 2014-10-28 | 2015-01-28 | 钰邦电子（无锡）有限公司 | Solid electrolytic capacitor with improved metal anode and manufacturing method thereof |
| CN110249400A (en) * | 2017-02-03 | 2019-09-17 | 株式会社村田制作所 | Solid electrolytic capacitor and method of making the same |
| CN210039947U (en) * | 2019-08-09 | 2020-02-07 | 丰宾电子（深圳）有限公司 | Solid electrolyte aluminum electrolytic capacitor with bent cathode |
| CN111095452A (en) * | 2017-09-23 | 2020-05-01 | 株式会社村田制作所 | Solid electrolytic capacitor and method for manufacturing the same |
| CN117766299A (en) * | 2023-12-31 | 2024-03-26 | 肇庆绿宝石电子科技股份有限公司 | Laminated solid aluminum electrolytic capacitor |
| CN118919303A (en) * | 2024-09-23 | 2024-11-08 | 丰宾电子科技股份有限公司 | Low ESR laminated aluminum electrolytic capacitor based on continuous phase metal layer |
-
2025
- 2025-01-06 CN CN202510017585.6A patent/CN119811901B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5377073A (en) * | 1992-01-27 | 1994-12-27 | Nec Corporation | Stacked type solid electrolytic capacitor |
| JPH1092695A (en) * | 1996-09-11 | 1998-04-10 | Matsushita Electric Ind Co Ltd | Chip-shaped solid electrolytic capacitor and manufacturing method thereof |
| CN1243325A (en) * | 1998-06-19 | 2000-02-02 | 松下电器产业株式会社 | Electrolytic capacitor, its anode body and production method thereof |
| JP2000228213A (en) * | 1999-02-04 | 2000-08-15 | Fuji Electric Co Ltd | Energy storage element and method of manufacturing the same |
| JP2008177200A (en) * | 2007-01-16 | 2008-07-31 | Matsushita Electric Ind Co Ltd | Solid electrolytic capacitor |
| JP2008177198A (en) * | 2007-01-16 | 2008-07-31 | Matsushita Electric Ind Co Ltd | Electrolytic capacitor |
| US20110254132A1 (en) * | 2009-07-02 | 2011-10-20 | Taiwan Semiconductor Manufacturing Company, Ltd. | Vertical interdigitated semiconductor capacitor |
| JP2012069631A (en) * | 2010-09-22 | 2012-04-05 | Sanyo Electric Co Ltd | Electrolytic capacitor |
| CN104319105A (en) * | 2014-10-28 | 2015-01-28 | 钰邦电子（无锡）有限公司 | Solid electrolytic capacitor with improved metal anode and manufacturing method thereof |
| CN110249400A (en) * | 2017-02-03 | 2019-09-17 | 株式会社村田制作所 | Solid electrolytic capacitor and method of making the same |
| CN111095452A (en) * | 2017-09-23 | 2020-05-01 | 株式会社村田制作所 | Solid electrolytic capacitor and method for manufacturing the same |
| CN210039947U (en) * | 2019-08-09 | 2020-02-07 | 丰宾电子（深圳）有限公司 | Solid electrolyte aluminum electrolytic capacitor with bent cathode |
| CN117766299A (en) * | 2023-12-31 | 2024-03-26 | 肇庆绿宝石电子科技股份有限公司 | Laminated solid aluminum electrolytic capacitor |
| CN118919303A (en) * | 2024-09-23 | 2024-11-08 | 丰宾电子科技股份有限公司 | Low ESR laminated aluminum electrolytic capacitor based on continuous phase metal layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119811901B (en) | 2026-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4224581A1 (en) | Composite current collector, preparation method, and lithium ion battery | |
| US7400492B2 (en) | Multi-layered solid electrolytic capacitor and method of manufacturing same | |
| KR100984535B1 (en) | Solid electrolytic capacitor and a method of producing the same | |
| US6791822B2 (en) | Solid electrolytic capacitor | |
| CN110853920B (en) | Solid tantalum capacitor and manufacturing process thereof | |
| KR101067168B1 (en) | Chip type electric double layer capacitor and manufacturing method thereof | |
| CN101527203A (en) | Solid electrolytic capacitor and manufacture method thereof | |
| US12308182B2 (en) | Core package, double-substrate multilayer solid aluminum electrolytic capacitor and method for preparing same | |
| CN112820546A (en) | Capacitor, multilayer capacitor, and method for manufacturing multilayer capacitor | |
| CN116844870A (en) | Capacitor core package, low-leakage laminated solid aluminum electrolytic capacitor and preparation method thereof | |
| CN115360021B (en) | High-reliability laminated solid aluminum electrolytic capacitor and preparation method thereof | |
| CN119811901B (en) | Aluminum wire type high polymer capacitor and preparation method thereof | |
| KR101404532B1 (en) | Solid electrolytic capacitor | |
| CN109637811A (en) | A kind of chip-type laminated solid aluminum electrolytic capacitor of ultrathin type polymer and preparation method | |
| CN116230404B (en) | Reflow soldering resistant laminated solid aluminum electrolytic capacitor and preparation method thereof | |
| CN109300689B (en) | Molded surface-mounted ceramic dielectric capacitor with anti-skid groove and preparation method thereof | |
| CN216212915U (en) | End electrode sheet type solid electrolyte tantalum capacitor | |
| CN115274306B (en) | A surface-mount solid aluminum electrolytic capacitor and its preparation method | |
| CN114203450A (en) | Laminated solid aluminum electrolytic capacitor and preparation method thereof | |
| JP2002170552A (en) | Energy storage device and method of manufacturing the same | |
| CN220367816U (en) | Laminated aluminum capacitor | |
| CN113488337A (en) | Novel laminated polymer aluminum electrolytic capacitor and manufacturing method thereof | |
| CN119964992A (en) | A large-capacity low-ESR laminated solid aluminum capacitor and a manufacturing method thereof | |
| CN223413950U (en) | A thin, high-capacity solid-state multilayer aluminum electrolytic capacitor | |
| US20240347281A1 (en) | Core, high-voltage multilayer solid aluminum electrolytic capacitor and method for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |