CN100483582C

CN100483582C - Production of polymer capacitor of aluminum electrolytic composite-insulating paper

Info

Publication number: CN100483582C
Application number: CNB2006100169424A
Authority: CN
Inventors: 林正吉; 温悰惠
Original assignee: CHANGCHUN DIGITAL-TECH ELECTRONICS Co Ltd
Current assignee: CHANGCHUN DIGITAL-TECH ELECTRONICS Co Ltd
Priority date: 2006-06-15
Filing date: 2006-06-15
Publication date: 2009-04-29
Anticipated expiration: 2026-06-15
Also published as: CN1897180A

Abstract

A producing method for compound insulating paper aluminum electrolytic macromolecule capacitor, the method is: the using method and the material of the electrolytic paper using for the core winding of the aluminum electrolytic macromolecule capacitor joins synthetic fiber material electrolytic paper between the anode and the cathode that replaces the firmer way to join a wood fiber between the anode and the cathode and the inner side of the core respectively, but joins the former wood fiber electrolytic paper at the inner side of the core or using with the opposite structure, uses strongpoint of the synthetic fiber and the wood fiber by the compound method using different material electrolytic paper, at the condition, when processing charring to the core in the following working procedure, it is not only the anti-high-pressure identity of the wood fiber can be exerted, but also the compound fiber liquates and adhibits between the anode and the cathode as the center to form the thick and close electric-conduction macromolecule layer, insures the well electric-conduction route of the anode and the cathode, thereby can improve the power of the capacitor and the well resistance identity.

Description

Production of polymer capacitor of aluminum electrolytic composite-insulating paper

Technical field

The present invention relates to a kind of production method of aluminium-electrolytic polymer capacitor, particularly a kind of production of polymer capacitor of aluminum electrolytic composite-insulating paper.

Background technology

The structure of aluminium-electrolytic polymer capacitor fuse in the past as shown in Figure 1, be in the middle of anode foils 1 and Cathode Foil 2, to add the thick wood fibre electrolytic paper 3 of 30～60 μ m, the electrolytic paper 3 that also adds same material in the inboard, each one deck, the condition that adds two layers is altogether reeled (winding), forms fuse.Use the purpose of wood fibre electrolytic paper 3 to be, prevent that anode and negative electrode are short-circuited (short circuit) when colliding mutually owing to the reason of plant equipment and prevent the AL of the fine pit structure of numerous functions of each self-forming between anode and the negative electrode when reeling ₂O ₃Injury-free and the destruction of acidifying epithelium.But, the fuse formation electroconductive polymer solid electrolyte layer that electric capacity is reeled in order to make polymer capacitor, the fuse of winding immerses in the conductive-polymer solution and makes electroconductive polymer fully immerse two electrodes, forms thick electroconductive polymer layer uniformly at anode and negative electrode.Yet the lignums above the electrolytic paper of wood fibre 3 have been owing to absorbed relatively large conductive-polymer solution, and the electroconductive polymer of minute quantity are arranged on

electrode foil

1,2 thereby cause the loss of capacitor and resistance characteristic to have tangible decline.In order to destroy the fibr tissue of wood fibre electrolytic paper 3, be necessary under about 200～300 ℃ of conditions, to carry out the heat of carbonization processing procedure of about 30～180 minutes kinds.Use the aluminium-electrolytic polymer capacitor of this wood fibre electrolytic paper 3, because though the fibr tissue after the carbonization is damaged, but its electrolytic paper 3 states also maintain the original state, and therefore have the hard-packed insulation isolation strip of different material to exist at anode and negative electrode.Even electroconductive polymer is absorbed by fuse, and absorb easily before than carbonization between anode and the negative electrode, form the solid polymer electrolytic layer, on the contrary, because descending, the absorbent properties of electrolytic paper 3 can not form macromolecule layer, at this moment, because the electroconductive polymer layer is sufficient inadequately between anode and the negative electrode, contact resistance and interface resistance between anode and negative electrode are higher.This phenomenon can make the withstand voltage properties of capacitor rise and the shortcoming that reduces as the equivalent series resistance (equivalent series resistance:ESR) of polymer capacitor central characteristics.Know that obviously wood fibre has such voltage-resistent characteristic, in order to improve resistance characteristic, electrolytic paper 3 possesses to fuse really between anode and negative electrode and sticks together, play to pass the function of carrying the conductive solid polymer electrolyte layer, can form with electrolytic paper 3 is the polyelectrolyte layers of the uniform thickness at center.For get rid of this essential defective of wood fibre, studying can use acryl fiber or nylon fiber etc. similarly synthetic fibers matter be the technology of electrolytic paper 3.Even if after having found out,,, voltage-resistent characteristic well imagines above the result that the decline of its equivalent series resistance still fundamentally is being restricted even being improved owing to still used the electrolytic paper 3 of the unlike material that insulation property are arranged.As shown in Figure 1, wherein core structures has (+) terminal 5, (-) terminal 6, high temperature resistant adhesive tape 4.

Summary of the invention

The objective of the invention is to solve and in the middle of anode foils and Cathode Foil, add the wood fibre electrolytic paper that needs carbonization in the above-mentioned aluminium electrolytic capacitor production process, there is different material insulation isolation strip to exist between anode and the negative electrode, cause contact resistance and the higher problem of interface resistance between anode and negative electrode, and a kind of production of polymer capacitor of aluminum electrolytic composite-insulating paper that overcomes above-mentioned shortcoming is provided.

The present invention's method is in the middle of synthetic fibers electrolytic paper adding anode foils and the Cathode Foil, reel behind the inboard of the fuse of wood fibre electrolytic paper adding simultaneously, perhaps, add the wood fibre electrolytic paper between anode and negative electrode, the inboard synthetic fibers electrolytic paper that adds carries out compound coiling, carbonization again, the synthetic fibers electrolyte that heat of fusion is sticked together in the middle of anode foils and the Cathode Foil can maximize the contact of anode and negative electrode, the electrolytic paper that uses conductive polymer liquid conduction hot melt to separate, the not only internal structure of the fine pit of anode foils and negative electrode, the electrolytic paper that hot melt is separated all fully forms conductive polymer body solid-state electrolyte layer, thereby reduce the equivalent series resistance of capacitor, though and fibr tissue has been subjected to destruction after the wood fibre electrolytic paper carbonization of fuse inboard, but owing to still keep its shape, find out from the result, when can contain the short circuit of anode and negative electrode generation, also therefore can keep the higher voltage-resistent characteristic of capacitor.

The present invention's method has been kept the voltage-resistent characteristic of capacitor, can improve the equivalent series resistance characteristic again.

Beneficial effect of the present invention:

If when only selecting the electrolytic paper of the electrolytic paper of wood fibre or synthetic fibers for use, though wood fibre is cheap carbonization technique must be arranged, though but price is more expensive when selecting synthetic fibers for use, but do not need the strong point of carbonization technique, but these two kinds of materials all there is being limitation aspect the reduction equivalent series resistance.So, the synthetic fibers that add nylon or acryl material between anode foils and the Cathode Foil, the inboard of fuse adds the electrolyte that wood fibre electrolytic paper process carbonisation improves macromolecule conductor, sticks together the kernel function that the macromolecule conductor of bringing into play electrolytic paper is used for finishing high molecular polymerization by separating through hot melt after the synthetic fibers carbonization again.Based on this, not only, on electrolytic paper, also can form sufficient conductive polymer dielectric substrate at the anode and the negative electrode of numerous fine pit structures.Owing to form thick uniform conductive body path between anode and negative electrode, contact impedance between anode and the negative electrode (contactresistance) is obviously descended with surface impedance (interfacial resistance), so the equivalent series resistance of capacitor also obtains descending.In addition, because the resistance reduction, so loss characteristic is improved.Moreover, the wood fibre electrolytic paper has been used in the inboard, can form the separating plate with insulation function, and the phenomenon that proof voltage descends can take place when using synthetic fibers, and owing to used wood fibre, therefore can obtain voltage the same when only using the wood fibre electrolytic paper.

Description of drawings

Fig. 1 is the core structures schematic diagram that former aluminium-electrolytic polymer capacitor is reeled.

Fig. 2 is the present invention's method production procedure schematic diagram.

The core structures schematic diagram that Fig. 3 reels for the present invention's aluminium-electrolytic polymer capacitor.

Fig. 4 amplifies 100 times photo for the surface of the wood fibre electrolytic paper after the carbonization.

Fig. 5 is that 100 times photo is amplified on synthetic fibers material electrolytic paper surface.

Embodiment

As shown in Figure 3, the present invention adds the electrolytic paper 7 of the synthetic fibers material of 30～60 μ m thickness as acryl fiber or nylon fiber etc. between anode foils 1 and Cathode Foil 2, the inboard electrolytic paper 3 that adds the wood fibre of 30～60 μ m same thickness of fuse overlaps to reel and forms.Then, continue to carry out the back operation by technical process shown in Figure 2.The heat treatment that carbonization technique was done under 200～300 ℃ temperature 30～180 minutes is finished.Adhere to each after synthetic fibers electrolytic paper 7 hot melts between adding anode foils 1 and the Cathode Foil 2 are separated and cause anode foils 1 and Cathode Foil 2 more closely to be pasted above the

electrode foil

1,2, and inboard wood fibre is through the fibr tissue after still maintenance is damaged after the carbonization.Fuse dipping after the carbonization of conductive polymer liquid makes conductive polymer liquid can be absorbed the curing down of 100～200 ℃ of temperature conditions in back fully, and the solvent of volatilization conductive polymer liquid makes its overlapping be convenient to form the solid-state electrolyte layer of macromolecule conductor.At this moment, the synthetic fibers material electrolytic paper 7 that fuses between anode foils 1 and the Cathode Foil 2 plays a role as the conduction of macromolecule conductor, high molecular overlapping core plays a role, the not only anode of numerous fine pits and negative electrode, also formed sufficient conductive polymer layer above the electrolytic paper 7, along with forming thick uniform conductive layer between anode and negative electrode, thus the contact impedance between anode and negative electrode (contact resistance) with surface impedance (interfacial resistance) thus significantly reduce the equivalent series resistance of capacitor.In addition, owing to resistance has reduced, so loss characteristic is improved.Moreover, wood fibre electrolytic paper 3 has been used in the inboard, can form the separating plate with insulation function, and the phenomenon that proof voltage descends can take place when using synthetic fibers, and owing to used wood fibre, therefore can obtain voltage the same when only using the wood fibre electrolytic paper.

Contrast photo after wood fibre electrolytic paper 3 after the carbonization amplifies 100 times with synthetic fibers material electrolytic paper 7 surfaces is respectively as Fig. 4, shown in Figure 5.

See also shown in Figure 2ly, the present invention's production process is in regular turn: coiling, transfer, carbonization, the polymerization of conductive polymer body, assembling, dipping, inserted sheet and printing packing.

Claims

1, a kind of production of polymer capacitor of aluminum electrolytic composite-insulating paper, this method is to add synthetic fibers material electrolytic paper between the anode foils of the fuse that capacitor is reeled and Cathode Foil, the inboard wood fibre electrolytic paper that adds of fuse, perhaps, add the wood fibre electrolytic paper between anode and negative electrode, the inboard synthetic fibers electrolytic paper that adds carries out compound coiling.

2, a kind of production of polymer capacitor of aluminum electrolytic composite-insulating paper according to claim 1 is characterized in that: described synthetic fibers material electrolytic paper is nylon fiber electrolytic paper or acryl fiber electrolytic paper.

3, a kind of production of polymer capacitor of aluminum electrolytic composite-insulating paper according to claim 1, it is characterized in that: behind described synthetic fibers material electrolytic paper, the compound coiling aluminium-electrolytic polymer capacitor of the wood fibre electrolytic paper fuse, the heating carbonization is 30～180 minutes in 200～300 ℃ of temperature ranges.