CN114713469A - Novel silver paste spraying process for laminated pole piece of capacitor - Google Patents
Novel silver paste spraying process for laminated pole piece of capacitor Download PDFInfo
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- CN114713469A CN114713469A CN202210321324.XA CN202210321324A CN114713469A CN 114713469 A CN114713469 A CN 114713469A CN 202210321324 A CN202210321324 A CN 202210321324A CN 114713469 A CN114713469 A CN 114713469A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to a novel silver paste spraying process of laminated pole pieces of a capacitor, which comprises the following steps: s1: partitioning treatment: and (3) cutting the foil strips after the foil strips are coated with the adhesive and partitioned, and S2: fixing treatment: fixing the cut foil strips on the handle strips, S3: the spraying treatment process comprises the following steps: fixing the strip in a holder of a spraying mechanism; silver paste spraying is carried out on the first surface, the second surface and the side surface of the foil strip at the same time; the silver paste coating with even and smooth thickness is obtained on the surface of the sprayed foil strip and is integrated with the foil strip. S4: and (3) drying treatment: and drying the sprayed silver paste coating of the foil strip to obtain the silver paste coating with the expected thickness. Through carrying out quantitative spraying to the foil strip surface for the stronger corner of drapability of silver thick liquid coating has the cladding, obtains the even pole piece of coating thickness, spouts the thinner pole piece that can pile up more of silver thick coating, more abundant contact between the pole piece, when reducing the material use amount and pile up thickness, possesses the improvement of more excellent ESR performance and capacity.
Description
Technical Field
The invention belongs to the field of capacitor manufacturing, and particularly relates to a novel silver paste spraying process for a laminated pole piece of a capacitor.
Background
With the higher requirements on the aspects of miniaturization, portability, high reliability and the like of modern electronic products, the precision degree of the capacitor is extremely high, so that the manufacturing process of the capacitor also needs to be continuously improved so as to adapt to the overall miniaturization of electronic equipment. The laminated capacitor core is mainly formed by stacking a plurality of pole pieces through silver paste, and the surface flatness of each lamination and the thickness of the silver paste need to be strictly and precisely controlled. The existing process is a process for directly soaking a pole piece in silver paste for a period of time and then taking out the pole piece, because the content of the silver paste is required to be greatly controlled on the one hand, the thickness of the silver paste coating is uncontrollable, the concentration of the silver paste is uncontrollable, after the silver paste is soaked and taken out and baked, the silver paste can sag under the action of gravity, the obtained thickness of the silver paste coating is unevenly distributed, the phenomenon that one end is too thin and the other end is too thick is caused, the pole pieces with the same number are laminated, the overall thickness is increased on the one hand, the volume of a capacitor is increased, a macromolecule layer on the pole piece is crushed, on the other hand, the ESR (equivalent series resistance) of the capacitor is increased due to the uneven thickness distribution of the silver paste layer in the pole piece, the use cost of the silver paste is increased, and the thickness of a core after lamination and the problem of increasing ERS are also solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a novel silver paste spraying process for laminated pole pieces of a capacitor.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a novel silver paste spraying process for laminated pole pieces of a capacitor comprises the following steps:
s1: partitioning treatment: coating a glue separating on the foil strip, partitioning, and then cutting the foil strip;
s2: fixing treatment: arranging and fixing the cut foil strips at intervals at the ends coated with the isolating glue on the side surfaces of the strips; the foil strips and the handle strips are fixed in parallel; gaps are reserved between the opposite surfaces of the adjacent foil strips, and the edges of the handle strips are exposed at the ends far away from the ends coated with the isolating glue;
s3: the spraying treatment process comprises the following steps: fixing the strip in a holder of a spraying mechanism; enabling the first spray head to be aligned to the first surface of the foil strip, enabling the second spray head to be aligned to the second surface of the foil strip, and enabling the spraying area to cover the first surface, the second surface and the side surface of the foil strip; setting spraying flow and spraying times; starting a spraying mechanism to simultaneously spray silver paste on the first surface, the second surface and the side surface of the foil strip; the first spray head and the second spray head move along the length direction of the bundle strips until the surfaces of all the foil strips in the bundle strips are sprayed, and the sprayed surfaces of the foil strips are coated with silver paste layers with uniform and flat thickness; the adhesive is flush and connected with the silver paste coating; the silver paste coating is uniformly and integrally attached to the surface of the foil strip and is integrally formed with the foil strip.
S4: and (3) drying treatment: drying the sprayed silver paste coating of the foil strip to solidify the silver paste coating on the surface of the foil strip; the steps S3 and S4 can be repeated several times to obtain a silver paste coating with a desired thickness.
Furthermore, the spraying mechanism comprises a first spray head and a second spray head which are aligned oppositely, and a space is reserved between the spray heads to enable the strip conveying foil strips to pass through.
Furthermore, first shower nozzle and second shower nozzle and foil strip parallel and level, and first shower nozzle and second shower nozzle distribute respectively in foil strip both sides simultaneously to the first surface of foil strip, second surface and side surface spraying.
Further, the first spray nozzle sprays the silver paste coating on the side surface of the foil strip while spraying the first surface, and the second spray nozzle sprays the silver paste coating on the side surface of the foil strip while spraying the second surface.
Further, the thickness of the silver paste coating is controlled by adjusting the spraying flow and the moving speed of the spraying mechanism.
Furthermore, the silver paste coating can be obtained by spraying once or several times, and the thickness of the silver paste coating is controlled within 0.2 mn.
Further, the silver paste spraying process of the laminated pole piece is applied to the capacitor pole piece.
The invention has the advantages and positive effects that:
the invention relates to a novel silver paste spraying process for a laminated pole piece of a capacitor, which solves the technical problems that a silver paste coating with uniform surface thickness is obtained by quantitatively and uniformly spraying a foil strip, and the problem of uneven coating thickness caused by the fact that silver paste flows vertically under the action of gravity in the traditional silver paste soaking mode is solved. Compared with the prior art, the invention has the following advantages:
1. according to the invention, the integrated quantitative spraying is carried out on the surface of the foil strip, so that the defect that the thickness of the silver paste coating is inconsistent due to the fact that the silver paste coating generates vertical flow due to gravity is overcome, the corners of the silver paste coating are coated more strongly through the spraying process, the pole pieces with uniform and thinner coating thickness are obtained, more pole pieces can be stacked under the condition of the same size, the pole pieces are contacted more fully due to the uniform and level silver paste coating, the ESR value is reduced, the material using amount and the stacking thickness are reduced, the more excellent ESR performance and capacity are improved, and the capacitor with high performance, high performance and high capacity and strong stability can be prepared.
2. But spout material recycle, thickness is controllable, and coating thickness is even, can not weigh the high score sublayer on the pole piece, improves product electric characteristic ESR and LC value and diminishes and the numerical value is stable balanced to and the number of piles that can fold under same height can be more, the capacity value of product can be bigger, realizes the miniaturization, reaches and improves product property, reduces old cost, plays energy saving and emission reduction's effect, very big retrencies processing procedure, has improved efficiency.
Drawings
FIG. 1 is a schematic flow diagram of the process steps of the present invention.
Fig. 2 is a schematic cross-sectional view of the spray mechanism of the present invention.
Fig. 3 is a schematic structural view of the stent of the present invention.
Fig. 4 is a schematic view of the structure of the present invention for securing a strip to a foil strip.
Fig. 5 is a partially enlarged view of the strap and foil strap of the present invention.
FIG. 6 is an enlarged partial view of the portion A of FIG. 2 according to the present invention.
Fig. 7 is a solid spray painting view of the foil strip of the present invention.
Fig. 8 is a cross-sectional view of a foil strip of the present invention.
Fig. 9 is a schematic view of the foil strip stack formation of the present invention.
Fig. 10 is a schematic cross-sectional view of a foil strip obtained by a conventional impregnation method.
Fig. 11 is a schematic view of a prior art foil strip stack formation.
The reference numbers illustrate: 1. a foil strip; 2. a conductive adhesive layer; 3. an anode; 4. a cathode; 5. a spraying mechanism; 6. a spraying area; 101. silver paste coating; 102. separating glue; 103. a pole piece 103; 501. a first nozzle; 502. a second nozzle; 503. a support; 504. a handle bar; 1011. a first surface; 1012. a second surface; 1013. a side surface.
Detailed Description
The embodiments of the invention will be described in further detail with reference to the accompanying drawings: the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center," "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or components must have a particular orientation or be constructed and operated in a particular orientation, and therefore, are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, the term "comprises" and any variations thereof mean "including at least".
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integrally formed connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 11, the silver paste spraying process for the novel capacitor laminated pole piece of the present invention comprises the following steps:
s1: partitioning treatment: coating the foil strip 1 with the glue separating 102, partitioning, and then cutting the foil strip 1;
s2: fixing treatment: arranging and fixing the cut ends of the foil strips 1 coated with the glue separating 102 on the side surfaces of the strips 504 at intervals; the foil strip 1 is fixed in parallel with the handle strip 504; a gap is reserved between the opposite surfaces of the adjacent foil strips 1, and the end far away from the end coated with the glue separating sheet 102 is exposed out of the edge of the handle strip 504;
s3: the spraying treatment process comprises the following steps: the strip 504 will be fixed in the holder 503 of the spraying mechanism 5; such that the first spray head 501 is directed at a first surface 1011 of the foil strip 1, the second spray head 502 is directed at a second surface 1012 of the foil strip 1, and the spray area 6 covers the first surface 1011, the second surface 1012 and a side surface 1013 of the foil strip 1; setting spraying flow and spraying times; and starting the spraying mechanism 5 to simultaneously spray silver paste on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1; the first spray head 501 and the second spray head 502 move along the length direction of the strips 504 until the surfaces of all the foil strips 1 in the strips 504 are sprayed, and the silver paste coating 101 with uniform and flat thickness is obtained on the surfaces of the sprayed foil strips 1; the adhesive separating layer 102 is flush and connected with the silver paste coating layer 101; silver thick liquid coating 101 for even integrative surface that adheres to in foil strip 1 and foil strip 1 form integratively.
S4: and (3) drying treatment: drying the sprayed silver paste coating 101 of the foil strip 1 to solidify the silver paste coating 101 on the surface of the foil strip 1; the steps S3 and S4 can be repeated several times to obtain the silver paste coating 101 with the desired thickness.
With reference to fig. 7 to 8, the foil strip 1 finally manufactured according to the present invention includes a coated spacer 102 and a surface silver paste coating 101 obtained after spraying. The foil strip 1 is a rectangular parallelepiped strip-shaped structure comprising two mutually parallel first surfaces 1011 and second surfaces 1012 and side surfaces 1013.
Referring to fig. 2-4, the apparatus used in the practice of the invention comprises a spray mechanism 5, the spray mechanism 5 comprising: the sprayer comprises a first sprayer 501, a second sprayer 502, a bracket 503 and a handle bar 504. The spraying mechanism 5 is used for spraying the foil strip 1, and the support 503 is used for fixing the handle strip 504. The strip 504 is used to fix the arrangement of the foil strips 1. The strip 504 penetrates through the spraying mechanism 5, and when the spraying operation is performed, the spraying mechanism 5 moves along the length direction of the strip 504, and simultaneously sprays the silver paste coating 101 on the outer surface of the foil strip 1.
Referring to fig. 5 and 7, a rectangular parallelepiped is illustrated as a foil strip 1, and a plurality of foil strips 1 are arranged in an array on the side of a handle 504, the foil strips 1 being parallel to the side of the handle 504. Any two adjacent foil strips 1 have a gap therebetween, and the non-fixed surfaces of the foil strips 1 are all in an open state. When sprayed, the areas sprayed are first and second surfaces 1011, 1012 and side surfaces 1013. The first surface 1011 and the second surface 1012 and the side surface 1013 of the foil strip 1 can be sprayed at the same time by one spraying. On the premise of ensuring the uniformity of spraying and the smoothness and consistency of the thickness of the silver paste coating 101, the process is better and has higher productivity.
The early stage process of the spraying process comprises the following steps: and coating the adhesive separation layer 102 on the foil strip 1, partitioning, and then cutting the foil strip 1 to obtain a foil strip 1 monomer, wherein one side of the adhesive separation layer 102 after partitioning is an anode end, and the other side of the adhesive separation layer 102 is a sprayed silver paste coating layer 101 as a cathode end. The cut foil strips 1 are arranged and fixed on the bar 504, and the bar 504 is fixed in the bracket 503 of the spraying mechanism 5. Before the atomized spraying mechanism 5 is started, relevant parameters are set, and the method comprises the following steps: the distances between the first spray head 501 and the second spray head 502 and the vertical plane of the foil strip 1, the moving speed of the spraying mechanism 5 along the strip 504, and the spraying flow rates and atomization values of the first spray head 501 and the second spray head 502 are set. The moving speed of the first nozzle 501 and the second nozzle 502, the spraying flow rate and the atomization value affect the thickness, the atomization effect and the coating uniformity of the sprayed silver paste coating 101.
For the moving speed of the nozzle, if the moving speed of the nozzle is faster under the condition of the same spraying flow rate, the thinner the sprayed silver paste coating 101 is. Under the condition of the same moving speed of the spray head, the larger the spraying flow rate is, the thicker the sprayed silver paste coating 101 is. According to the expected thickness of the silver paste coating 101, corresponding parameter settings are performed on the moving speed of the spray head and the spraying flow of the spray head, so that the thicker the corresponding expected sprayed silver paste coating 101 is.
The spraying process comprises the following steps:
s1, partition processing: the foil strip 1 is coated with the glue separating 102 and is divided into regions, and then the foil strip 1 is cut.
Specifically, two side surfaces, namely a first surface 1011 and a second surface 1012, of the foil strip 1 to be cut are coated with a separator 102, and the foil strip 1 is divided into an anode area and a cathode area. The foil strip 1 is cut into a specified length in a cutting mode, and the cut foil strip 1 respectively comprises an anode area, a cathode area and a separating glue 102. More specifically, the foil 1 is a foil 1 having a polymer conductive layer and an oxide film formed on the surface thereof.
S2, fixing treatment: arranging and fixing the cut foil strips 1 coated with the glue separating 102 at intervals on the side surfaces of the strips 504; the foil strip 1 is fixed in parallel with the handle strip 504; a gap is left between the opposite faces of adjacent foil strips 1, and the end far away from the end coated with the glue barrier 102 is exposed out of the edge of the handle strip 504. Specifically, the cut foil strip 1 is fixed on the side surface of the handle 504 by welding, and the fixing mode may be one of cold welding, pressure welding, laser welding and ultrasonic welding. One end of each foil strip 1, which is close to the adhesive spacers 102, is in contact with the handle strips 504 and is welded and fixed, one end of each foil strip 1, which is far away from the adhesive spacers 102, extends out of the edges of the handle strips 504, namely the extending parts are spraying areas, each foil strip 1 is distributed in an array at intervals, and a certain gap is reserved between each foil strip 1. During spraying, the atomized silver paste enters from the gap and sticks to the side surface 1013 of the foil strip 1.
S3: the spraying treatment process comprises the following steps: the strip 504 will be fixed in the holder 503 of the spraying mechanism 5; such that the first spray head 501 is directed at a first surface 1011 of the foil strip 1, the second spray head 502 is directed at a second surface 1012 of the foil strip 1, and the spray area 6 covers the first surface 1011, the second surface 1012 and a side surface 1013 of the foil strip 1; setting spraying flow and spraying times; and starting the spraying mechanism 5 to simultaneously spray silver paste on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1; the first spray head 501 and the second spray head 502 move along the length direction of the strips 504 until the surfaces of all the foil strips 1 in the strips 504 are sprayed, and the silver paste coating 101 with uniform and flat thickness is obtained on the surfaces of the sprayed foil strips 1; the adhesive separating layer 102 is flush and connected with the silver paste coating layer 101; silver thick liquid coating 101 for even integrative surface that adheres to in foil strip 1 and foil strip 1 form integratively.
Specifically, at least two or more nozzles are provided in the spraying mechanism 5, and the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1 are simultaneously sprayed, that is, the silver paste is sprayed on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1 at one time. In some embodiments, the spraying may be repeated multiple times for different requirements, so as to reach a silver paste coating 101 of a preset thickness.
The spraying mechanism 5 comprises two oppositely aligned first and second spray heads 501, 502, which are spaced apart to feed the strips 504 through the foil strip 1.
The first spray head 501 and the second spray head 502 are flush with the foil strip 1, and the first spray head 501 and the second spray head 502 are respectively distributed on two sides of the foil strip 1 and spray-coat a first surface 1011, a second surface 1012 and a side surface 1013 of the foil strip 1. The thickness of the silver paste coating 101 is controlled by adjusting the spraying flow and the moving speed of the spraying mechanism 5.
The strip 504 is fixed in a holder 503 of the spraying means 5, the spraying means 5 penetrating the holder 503, and during spraying the first spray head 501 is directed at a first surface 1011 of the foil strip 1, the second spray head 502 is directed at a second surface 1012 of the foil strip 1, and the spraying area 6 covers the first surface 1011, the second surface 1012 and a side surface 1013 of the foil strip 1.
The first spray head 501 sprays the first surface 1011 and simultaneously sprays the silver paste coating 101 on the side surface 1013 of the foil strip 1, and the second spray head 502 sprays the second surface 1012 and simultaneously sprays the silver paste coating 101 on the side surface 1013 of the foil strip 1.
Setting spraying flow and spraying times; and starting the spraying mechanism 5 to simultaneously spray silver paste on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1; the first spray head 501 and the second spray head 502 are moved along the length of the strip 504 until the spraying of the surface of all the foil strips 1 in the strip 504 is completed. Because the silver thick liquid after 5 atomizes of spraying mechanism is covering the surface of foil strip 1, the silver thick liquid coating 101 that obtains at this moment is very thin, can obtain preliminary solidification in the twinkling of an eye, has prevented that silver thick liquid coating 101 from producing the sagging because of gravity, has avoided producing the shortcoming that the coating thickness is uneven. The silver paste coating 101 can be obtained by spraying once or several times, and the thickness of the silver paste coating 101 is controlled within 0.2 mn.
The surface of the sprayed foil strip 1 is provided with a silver paste coating 101 with uniform and flat thickness; the adhesive separating layer 102 is flush and connected with the silver paste coating layer 101; silver thick liquid coating 101 for even integrative surface that adheres to in foil strip 1 and foil strip 1 form integratively.
S4: and (3) drying treatment: drying the sprayed silver paste coating 101 of the foil strip 1 to solidify the silver paste coating 101 on the surface of the foil strip 1; the steps S3 and S4 can be repeated several times to obtain the silver paste coating 101 with the desired thickness.
After the drying treatment is finished, the silver paste coating 101 uniformly distributed on the surface of the foil strip 1 is obtained. When the aluminum electrolytic capacitor is manufactured, the dried foil strip 1 is cut from the strip 504 to obtain the pole piece 103, the surface of the pole piece 103 is coated with the conductive adhesive layer 2, and then a plurality of pole pieces 103 are stacked and adhered to obtain a pole piece 103 combined body. And stacking the pole piece 103 combination, connecting one sides of the foil strips 1 together to form an anode 3, and connecting one sides of the silver paste coatings 101 together to form a cathode 4 to obtain a laminated core. And packaging the laminated core to obtain the aluminum electrolytic capacitor.
Example one
S1: partitioning treatment: the foil strip 1 is coated with the glue separating 102 and is divided into regions, and then the foil strip 1 is cut.
S2: fixing treatment: arranging and fixing the cut ends of the foil strips 1 coated with the glue separating 102 on the side surfaces of the strips 504 at intervals; the foil strip 1 is fixed in parallel with the handle strip 504; a gap is left between the opposite faces of adjacent foil strips 1, and the end far away from the end coated with the glue barrier 102 is exposed out of the edge of the handle strip 504.
S3: the spraying treatment process comprises the following steps: the strip 504 will be fixed in the holder 503 of the spraying mechanism 5; such that the first spray head 501 is directed at a first surface 1011 of the foil strip 1, the second spray head 502 is directed at a second surface 1012 of the foil strip 1, and the spray area 6 covers the first surface 1011, the second surface 1012 and a side surface 1013 of the foil strip 1; setting the spraying times to be 1 time; the air pressure of the first spray head 501 and the second spray head 502 is 0.4MP6, and the speed of the spraying mechanism 5 moving along the bar 504 is 10 cm/s. And starting the spraying mechanism 5 to simultaneously spray silver paste on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1; the first spray head 501 and the second spray head 502 move along the length direction of the strips 504 until the surfaces of all the foil strips 1 in the strips 504 are sprayed, and the silver paste coating 101 with uniform and flat thickness is obtained on the surfaces of the sprayed foil strips 1; the adhesive separating layer 102 is flush and connected with the silver paste coating layer 101; silver thick liquid coating 101 for even integrative surface that adheres to in foil strip 1 and foil strip 1 form integratively.
S4: and (3) drying treatment: drying the sprayed silver paste coating 101 of the foil strip 1 to solidify the silver paste coating 101 on the surface of the foil strip 1; the steps S3 and S4 can be repeated several times to obtain the silver paste coating 101 with the desired thickness. The silver paste coating 101 is obtained by one-time spraying, and the thickness of the silver paste coating 101 is 0.1 mn.
After the drying treatment is finished, the silver paste coating 101 uniformly distributed on the surface of the foil strip 1 is obtained. When the aluminum electrolytic capacitor is manufactured, the dried foil strip 1 is cut from the strip 504 to obtain the pole piece 103, the surface of the pole piece 103 is coated with the conductive adhesive layer 2, and then a plurality of pole pieces 103 are stacked and adhered to obtain a pole piece 103 combined body. And stacking the pole piece 103 combination, connecting one sides of the foil strips 1 together to form an anode 3, and connecting one sides of the silver paste coatings 101 together to form a cathode 4 to obtain a laminated core. And packaging the laminated core, coating the ten pole pieces 103 with the conductive adhesive layer 2, and stacking to obtain a total thickness of 2 nm. And packaging to obtain the aluminum electrolytic capacitor.
Example two
S1: partitioning treatment: the foil strip 1 is coated with the glue separating 102, and the foil strip 1 is cut after being partitioned.
S2: fixing treatment: arranging and fixing the cut ends of the foil strips 1 coated with the glue separating 102 on the side surfaces of the strips 504 at intervals; the foil strip 1 is fixed in parallel with the handle strip 504; a gap is left between the opposite faces of adjacent foil strips 1, and the end far away from the end coated with the glue barrier 102 is exposed out of the edge of the handle strip 504.
S3: the spraying treatment process comprises the following steps: the strip 504 will be fixed in the holder 503 of the spraying mechanism 5; such that the first spray head 501 is directed at a first surface 1011 of the foil strip 1, the second spray head 502 is directed at a second surface 1012 of the foil strip 1, and the spray area 6 covers the first surface 1011, the second surface 1012 and a side surface 1013 of the foil strip 1; setting the spraying times to be 2 times; the air pressure of the first spray head 501 and the second spray head 502 is 0.7MP6, and the speed of the spraying mechanism 5 moving along the bar 504 is 4 cm/s. And starting the spraying mechanism 5 to simultaneously spray silver paste on the first surface 1011, the second surface 1012 and the side surface 1013 of the foil strip 1; the first spray head 501 and the second spray head 502 move along the length direction of the strips 504 until the surfaces of all the foil strips 1 in the strips 504 are sprayed, and the silver paste coating 101 with uniform and flat thickness is obtained on the surfaces of the sprayed foil strips 1; the adhesive separating layer 102 is flush and connected with the silver paste coating layer 101; silver thick liquid coating 101 for even integrative surface that adheres to in foil strip 1 and foil strip 1 form integratively.
S4: and (3) drying treatment: drying the sprayed silver paste coating 101 of the foil strip 1 to solidify the silver paste coating 101 on the surface of the foil strip 1; the steps S3 and S4 can be repeated several times to obtain the silver paste coating 101 with the desired thickness. The silver paste coating 101 is obtained by one-time spraying, and the thickness of the silver paste coating 101 is 0.2 mn.
After the drying treatment is finished, the silver paste coating 101 uniformly distributed on the surface of the foil strip 1 is obtained. When the aluminum electrolytic capacitor is manufactured, the dried foil strip 1 is cut from the strip 504 to obtain the pole piece 103, the surface of the pole piece 103 is coated with the conductive adhesive layer 2, and then a plurality of pole pieces 103 are stacked and adhered to obtain a pole piece 103 combined body. And stacking the pole piece 103 combination, connecting one sides of the foil strips 1 together to form an anode 3, and connecting one sides of the silver paste coatings 101 together to form a cathode 4 to obtain a laminated core. And packaging the laminated core, coating the ten pole pieces 103 with the conductive adhesive layer 2, and stacking to obtain a total thickness of 4 nm. And packaging to obtain the aluminum electrolytic capacitor.
Comparative example 1
With reference to fig. 10 to 11, S1: partitioning treatment: the foil strip 1 is coated with the glue separating 102 and is divided into regions, and then the foil strip 1 is cut.
S2: fixing treatment: arranging and fixing the cut ends of the foil strips 1 coated with the glue separating 102 on the side surfaces of the strips 504 at intervals; the foil strip 1 is fixed in parallel with the handle strip 504; a gap is left between the opposite faces of adjacent foil strips 1, and the end far away from the end coated with the glue barrier 102 is exposed out of the edge of the handle strip 504.
S3: silver paste soaking treatment: the method comprises the steps of soaking a foil strip 1 fixed in a strip 504 in silver paste, after a period of time, extracting the strip 504 together with the foil strip 1 from the silver paste, statically airing or draining, obtaining a silver paste coating 101 formed on the surface of the foil strip 1 after the silver paste is dried, and enabling the silver paste coating 101 to vertically flow due to gravity, so that the thickness of the silver paste coating 101 is unevenly distributed and attached to the surface of the foil strip 1 to form a whole with the foil strip 1. The silver paste coating 101 obtained by soaking the silver paste is uneven in thickness distribution, the thickest end of the silver paste coating is 1.5nm, and the thinnest end of the silver paste coating is 0.5nm, so that the situation that the silver paste coatings 101 at two ends of the foil strip 1 are uneven in distribution is formed.
Cutting the dried foil strip 1 from the strip 504 to obtain the pole piece 103, coating the surface of the pole piece 103 with a conductive adhesive layer 2, and then stacking and adhering a plurality of pole pieces 103 to obtain a pole piece 103 combination. And stacking the pole piece 103 combination, connecting one sides of the foil strips 1 together to form an anode 3, and connecting one sides of the silver paste coatings 101 together to form a cathode 4 to obtain a laminated core. And packaging the laminated core, coating the ten pole pieces 103 with the conductive adhesive layer 2, and stacking to obtain a total thickness of 15 nm. And packaging to obtain the aluminum electrolytic capacitor.
In the first embodiment, a silver paste spraying process is adopted, and 1 time of spraying is performed to obtain a silver paste coating 101 with uniform thickness distribution, wherein the thickness of the silver paste coating 101 is 0.1 mn. The total thickness of the stacked 10 pole pieces 103 was 2 nm.
With reference to fig. 10, in the second embodiment, a silver paste spraying process is adopted, and the silver paste coating 101 with uniform thickness distribution is obtained by spraying for 2 times, wherein the thickness of the silver paste coating 101 is 0.2 mn. The total thickness of the stacked ten pole pieces 103 was 4 nm.
With reference to fig. 11, the silver paste immersion process is adopted in the comparative example, the thickness distribution of the silver paste coating 101 obtained by the silver paste immersion method is not uniform, the thickest end of the medium thickness is 1.5nm, and the thinnest end of the medium thickness is 0.5nm, so that the situation that the silver paste coatings 101 at the two ends of the foil strip 1 are not uniformly distributed is formed. The 10 pole pieces 103 were stacked after being coated with the conductive adhesive layer 2, and the total thickness obtained was 15 nm.
In conclusion, by the process of spraying the silver paste, the silver paste coating 101 on the surface of the obtained foil strip 1 is uniformly distributed, the thickness of the silver paste coating 101 is controllable, and the uniformly distributed silver paste coating 101 with the thickness of less than 0.2nm can be obtained. And the silver paste coating 101 on the surface of the obtained foil strip 1 is unevenly distributed and the thickness of the silver paste coating 101 is uncontrollable, so that the thicknesses of the silver paste coatings 101 at two ends of the foil strip 1 are inconsistent, the thickness of the silver paste coating 101 is larger, the total thickness is increased during lamination, and the number of the laminated layers is small at the specified height. And the thickness of the two ends is not consistent, and the packaging cannot be realized. By quantitatively spraying silver paste on the foil strips 1, the silver paste coating 101 is uniform and consistent in thickness and high in drapability. The problem that the silver paste coating 101 cannot obtain the silver paste coating 101 with uniform degree due to the fact that the silver paste coating 101 flows vertically due to gravity caused by traditional silver paste soaking is solved. And the process of spraying silver paste is adopted, the thickness of the silver paste coating 101 can be controlled, the silver paste coating 101 with uniform thickness distribution can be obtained, more foil strips 1 can be laminated at the specified height, and the thickness is thinner, so that the larger the capacity of the obtained aluminum electrolytic capacitor is, the smaller the SER is, and the aluminum electrolytic capacitor with large capacity, small volume and light weight can be realized.
It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the invention is not to be limited to the embodiments described in the detailed description, and that other embodiments may be devised by those skilled in the art based on the teachings herein, and are within the scope of the appended claims.
Claims (7)
1. A novel silver paste spraying process for laminated pole pieces of a capacitor comprises the following steps:
s1: partitioning treatment: coating glue separation (102) on the foil strip (1), partitioning, and then cutting the foil strip (1);
s2: fixing treatment: arranging and fixing the ends of the cut foil strips (1) coated with the glue separating strips (102) at intervals on the side surfaces of the strips (504); the foil strip (1) and the handle strip (504) are fixed in parallel; a gap is reserved between the opposite surfaces of the adjacent foil strips (1), and one end far away from the end coated with the glue separating strip (102) is exposed out of the edge of the handle strip (504);
s3: the spraying treatment process comprises the following steps: the bar (504) is fixed in a bracket (503) of the spraying mechanism (5); aligning a first spray head (501) to a first surface (1011) of the foil strip (1), aligning a second spray head (502) to a second surface (1012) of the foil strip (1), and covering the first surface (1011), the second surface (1012) and a side surface (1013) of the foil strip (1) with a spray area (6); setting spraying flow and spraying times; starting a spraying mechanism (5) to simultaneously spray silver paste on the first surface (1011), the second surface (1012) and the side surface (1013) of the foil strip (1); the first spray head (501) and the second spray head (502) move along the length direction of the strips (504) until the surfaces of all the foil strips (1) in the strips (504) are sprayed, and the surfaces of the sprayed foil strips (1) are coated with silver paste coatings (101) with uniform and flat thickness; the adhesive separating layer (102) is flush and jointed with the silver paste coating layer (101); the silver paste coating (101) is uniformly and integrally attached to the surface of the foil strip (1) to form a whole with the foil strip (1);
s4: and (3) drying treatment: drying the silver paste coating (101) of the sprayed foil strip (1) to solidify the silver paste coating (101) on the surface of the foil strip (1); the steps S3 and S4 can be repeated several times to obtain a silver paste coating (101) with a desired thickness.
2. The silver paste spraying process of the laminated pole piece of the capacitor as claimed in claim 1, wherein the spraying mechanism (5) comprises a first spray head (501) and a second spray head (502) aligned opposite to each other, and the spray heads are spaced apart from each other to convey the strip (504) through the foil strip (1).
3. The silver paste spraying process of the laminated pole piece of the capacitor as claimed in claim 1, wherein the first spray head (501) and the second spray head (502) are flush with the foil strip (1), and the first spray head (501) and the second spray head (502) are respectively distributed on two sides of the foil strip (1) and spray the first surface (1011), the second surface (1012) and the side surface (1013) of the foil strip (1).
4. The silver paste spraying process of the laminated pole piece of the capacitor as claimed in claim 1, wherein the first spraying head (501) sprays the first surface (1011) and simultaneously sprays the silver paste coating (101) on the side surface (1013) of the foil strip (1), and the second spraying head (502) sprays the second surface (1012) and simultaneously sprays the silver paste coating (101) on the side surface (1013) of the foil strip (1).
5. The silver paste spraying process of the laminated pole piece of the capacitor as claimed in claim 1, wherein the thickness of the silver paste coating (101) is controlled by adjusting the spraying flow rate and the moving speed of the spraying mechanism (5).
6. The silver paste spraying process of the laminated pole piece of the capacitor as claimed in claim 1, wherein the silver paste coating (101) is obtained by one or more spraying, and the thickness of the silver paste coating (101) is controlled within 0.2 mn.
7. The application of the silver paste spraying process of the laminated pole piece of any one of claims 1 to 6 in the pole piece of a capacitor.
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