KR101791894B1 - Electric double layer device - Google Patents

Electric double layer device Download PDF

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Publication number
KR101791894B1
KR101791894B1 KR1020160022392A KR20160022392A KR101791894B1 KR 101791894 B1 KR101791894 B1 KR 101791894B1 KR 1020160022392 A KR1020160022392 A KR 1020160022392A KR 20160022392 A KR20160022392 A KR 20160022392A KR 101791894 B1 KR101791894 B1 KR 101791894B1
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KR
South Korea
Prior art keywords
terminal
port
hole
double layer
electric double
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Application number
KR1020160022392A
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Korean (ko)
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KR20170100694A (en
Inventor
신나리
유성욱
이규정
김영진
안형식
최정호
최영석
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주식회사 네스캡
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Priority to KR1020160022392A priority Critical patent/KR101791894B1/en
Priority to JP2017552838A priority patent/JP6723261B2/en
Priority to PCT/KR2016/002405 priority patent/WO2016163647A1/en
Priority to EP16776750.8A priority patent/EP3282462A4/en
Priority to US15/564,189 priority patent/US10658128B2/en
Publication of KR20170100694A publication Critical patent/KR20170100694A/en
Application granted granted Critical
Publication of KR101791894B1 publication Critical patent/KR101791894B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/80—Gaskets; Sealings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0869—Acids or derivatives thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/68—Current collectors characterised by their material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • H01G2/103—Sealings, e.g. for lead-in wires; Covers
    • 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

Abstract

The present invention rapidly flows into the first and second pockets 51a and 52a when the urethane resin 53 is introduced into the first port groove 51 and the second port groove 52, The first terminal 21 and the first through hole 41 and the gap between the second terminal 22 and the second through hole 42 by tightly adhering to the terminal 21 and the second terminal 22, And more particularly, to an electric double layer device which can prevent leakage of positive ions through gaps between the electrodes and thereby increase lifetime relatively.

Description

ELECTRIC DOUBLE LAYER DEVICE

The present invention relates to an electric double layer device, and more particularly, to an electric double layer device capable of assuring a life expectancy as well as a neat appearance.

2. Description of the Related Art Generally, an electric double layer device is an element that stores electrical energy such as a battery, a capacitor, or an electrolytic capacitor. The electric double layer device electrically charges and discharges electricity by using an electrically conductive electrode. , MP3 players or memory backups, or for driving motors in wind, solar, electric cars or hybrid cars.

An example of an electric double layer device is a capacitor.

The electric double layer capacitor functions to accumulate electricity like a battery by forming an electrostatic layer on the interface between the activated carbon electrode and the organic electrolyte and using the electric double layer state as a function of the dielectric.

Particularly, the charge accumulated in the electric double layer generated between the solid electrode and the solid or liquid electrolyte is used.

Capacitors have low energy density compared to batteries, but exhibit excellent power density in terms of instantaneous high power output, and have been applied to various fields due to their semi-permanent lifetime exceeding several hundred thousand times.

As a principle of the electric double layer capacitor, when a pair of solid electrodes are put in an electrolyte solution of an electrolyte and a DC voltage is applied, anion is positively induced in the electrode polarized by the anode, and positive ions are positively induced in the electrode polarized by the cathode, . Particularly, in the case of activated carbon, numerous pores are distributed and the electric double layer is formed naturally.

At this time, the structure of the electric double layer capacitor is composed of an electrode, a separator, an electrolyte, a current collector and a case.

Among these, the most important part of the capacitor is the selection of the material used for the electrode, but the capacitance is also changed by various other components.

The electrode material must have high electrical conductivity, high specific surface area, and electrochemical stability.

Next, a battery is an example of the electric double layer device.

A battery is a device that converts the chemical energy of a chemical substance (active material) contained therein into an electrical energy through an electrochemical oxidation-reduction reaction (redox reaction).

A cell represents a collection of two or more electrochemical cells, but is usually used for a single cell. Such a cell is made such that an electrochemical reaction takes place instead of a chemical reaction so that electrons can flow to the outside through a lead. Electrons flowing through the lead provide an electrical usefulness as a source of electrical energy.

More specifically, the cell has active materials such as a cathode or a positive electrode and an anode or a negative electrode, which are placed on the current collector, are separated from each other by a separator, and an electrolyte (electrolyte).

In order to operate lamps, machines and appliances, proper electrode materials and electrolytes should be selected and arranged in a special structure so that sufficient voltage and current can be generated between the two electrodes of the battery.

For example, a cathode that receives electrons from an external conductor and that reduces the cathode active material, a cathode that discharges electrons to the conductor as the anode active material oxidizes, and an oxidation reaction of the anode and a cathode, A separator for preventing physical contact between the anode and the cathode, and the like must be arranged so as to be able to provide chemical energy as electrical energy.

The negative electrode of the battery arranged in this way basically emits electrons and oxidizes itself. When the positive electrode receives electrons (together with positive ions) and the battery itself is operated to be connected to an external load, the two electrodes are electrochemically They make changes and do electrical work.

At this time, the electrons generated by the oxidation reaction of the cathode migrate to the anode via the external load, reach the anode and cause a reduction reaction with the cathode material, and anion (negative ion) and cation ion) to complete the charge flow.

Inside the electrolyte, the reaction proceeds so that the charge continues to flow through the outer conductor, and by doing so, the electrical work is carried out on the charge.

A battery can be classified into a liquid electrolyte cell and a polymer electrolyte cell depending on the kind of electrolyte. Generally, a battery using a liquid electrolyte is called a lithium ion battery, and a lithium polymer battery when a polymer electrolyte is used.

FIG. 1 is a schematic view showing the structure of a general electric double layer device, FIG. 2 is a schematic view for explaining the charging principle of an electric double layer capacitor applied to a general electric double layer device, and FIG. 3 is a schematic view showing an electric double layer capacitor And FIG.

A general electric double layer device 100 includes an electrode 10, an electrolyte 20, a current collector 30, a separator 40, a first lead terminal 61 and a second lead terminal 62 ).

At this time, when the electric double layer device 100 is compared with a battery, the chemical energy of a chemical substance (active material) contained therein will be converted into electric energy through an electrochemical oxidation-reduction reaction, The electrode 10 on the electrode 30 has an active material such as a positive electrode and a negative electrode.

On the other hand, when the electric double layer device 100 is compared with a capacitor, its characteristics will be described in more detail. By using a distribution in which positive and negative charges are arranged in a short distance in the interface between two different electrodes 10, And exhibits a high capacitive characteristic in the farad unit, and has a characteristic that performance change and deterioration due to charging and discharging cycles are extremely small.

The electrode 10 stores the charge by the electric double layer formed at the interface with the electrolyte 20 using activated carbon having a large specific surface area and the electrode 10 has a capacitance ) And internal resistance characteristics are the most important criteria for performance evaluation. Therefore, the material should have low resistivity and be a porous structure, and the pore size and distribution of the porous structure should be simple and balanced. The characteristics of the material of the electrode 10 dominate the intrinsic charge and discharge characteristics of the electric double layer capacitor.

Therefore, active carbon sub-system having a large specific surface area and low cost is widely used as the current electrode 10, and studies using metal oxides and conductive polymers have been increasing to increase energy density.

On the other hand, the electrolyte 20 uses an organic solvent, a quaternary ammonium salt (organic), and an aqueous sulfuric acid solution (aqueous solution). Electrical conductivity can be improved by mixing certain proportions of PC, ethylmethyl carbonate (EMC), PC and dimethoxyethane (DME) in organic solvent electrolytes.

The electrostatic capacity per unit area of the electric double layer capacitor 100 using the organic electrolytic solution is 4 to 6 kV / cm 2, and since the electric conductivity of the aqueous system is higher than that of the organic electrolytic solution, But it has disadvantages such as narrowing of potential window and decomposition.

As the separator 40, nonwoven fabric, porous polyethylene (PE), porous polypropylene (PP) film, or the like is used.

The charging principle of the electric double layer capacitor is explained with reference to the charging principle of the electric double layer capacitor of FIG. 2 in a state where the two electrodes 10 and the electrolyte 20 are opposed to each other with the separator 40 interposed therebetween as shown in FIG. The electric charge distribution inside the bulk state becomes non-uniform and the electric potential difference between the electrodes 10 becomes zero, and the charge / discharge principle of the electric double layer capacitor of Fig. 3 When electric energy is supplied from the outside as shown in the circuit diagram for explanation, the internal charge distribution is uniformly formed and the energy of the potential difference 2? 1 voltage is charged between the two electrodes 10 as shown in Fig.

At this time, even if the supply of the electric energy is interrupted, the already formed electric double layer does not disappear, and the charged electric energy is maintained and preserved.

Prior Art Document (Korean Published Patent Application No. 2009-0118328; Modular Electric Double-Layer Capacitor and Manufacturing Method Thereof)

FIG. 4 is a process diagram illustrating a manufacturing process of an electric double layer capacitor according to the prior art document, FIG. 5 is a diagram illustrating a method of manufacturing an integrated electric double layer capacitor according to the prior art document, and FIG. FIG. 2 is a view illustrating a manufacturing process of an electrode device in an electric double layer capacitor according to an embodiment of the present invention.

2. Description of the Related Art Generally, energy storage devices such as rechargeable / rechargeable secondary batteries such as an electrolytic capacitor and an electric double layer capacitor (EDLC) are widely used as a jelly roll type winding-type battery.

4, a retractable energy storage device, such as an EDLC (Electrochemical Double Layer Capacitor), is mainly composed of a cylindrical case 20 made of aluminum (Al), a case 20 (Not shown).

The winding element 10 is constituted by winding a belt-like electrode laminate body, that is, a belt-like electrode laminate composed of electrode elements of positive and negative electrodes and an electrolyte interposed between the electrode elements of the positive and negative electrodes, And is formed by taping the outside so that the winding shape is not loosened.

The terminal 30 is provided on the upper portion of the winding element 10 and the terminal plate 30 is provided with a lug. Or an external terminal 40 of a screw type is fastened.

A neck portion 21 for preventing the terminal plate 30 from being pushed downward is formed at an upper portion of the case 20 so that the winding element 10 is formed in such a manner that the neck portion 21 is formed in the case 20 And the winding element 10 and the external terminal 40 are electrically connected to each other by the terminal 23. Thereafter, the terminal board 30 is fixed in the case 20 through a curling process of bending the upper end 22 of the case 20, thereby completing assembly.

6, the electrode element 100 includes an electrode current collecting sheet 111 such as a conventional aluminum foil and an electrode active material coated on the current collecting sheet 111 112).

The electrode active material 112 is formed by applying a conductive paste mainly composed of activated carbon.

The terminal 120 is coupled to the electrode element 100. At this time, the electrode active material 112 is removed by scraping a portion to which the terminal 120 is to be coupled first, and then the electrode active material 112 is removed by a process such as rivetting, 120 are coupled to each other.

The Applicant of the present application intends to propose an electric double layer device according to the present invention by improving the prior art document.

Korean Patent Publication No. 2009-0118328; Modular electric double layer capacitor and manufacturing method thereof

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric double layer device capable of preventing the leakage of positive ions and thereby increasing the lifetime while eliminating the wetting phenomenon.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric double layer device which ensures workability and ensures a clean appearance finish.

It is an object of the present invention to provide an electric double layer device capable of preventing corrosion of an aluminum terminal in advance.

An object of the present invention is to provide a circuit board having a first terminal and a second terminal on a circuit board so that a center of a volume jaw protruded to an upper portion of a rubber can be previously lowered to have a recess so that even when the center of the volume jaw is increased, And an electric double layer element which can be stably mounted when the second terminal is connected.

An object of the present invention is to provide an electric double layer device capable of enhancing the interfacial bonding force of a urethane resin.

An object of the present invention is to provide an electric double layer device capable of maximizing a fixing force of a urethane resin.

According to an aspect of the present invention,

A winding electrode unit having a first current collector sheet and a second current collector sheet wound while being separated by a separating sheet; first and second terminals respectively connected to the first current collector sheet and the second current collector sheet; An electric double layer including a rubber case having a first through hole and a second through hole pierced so as to expose the first and second terminals through the first terminal and the second terminal while covering the case, In the device,

And a urethane port portion for filling a gap between the first terminal and the first through hole exposed to the outside of the rubber container and a gap between the second terminal and the second through hole,

Wherein the urethane port portion has a first port groove and a second port hole, respectively, which are relatively lowered by volume protrusions protruding toward the upper portion of the rubber around the first through holes and the second through holes through which the first terminal and the second terminal are passed, A second port groove, and a urethane resin filled in the first port groove and the second port groove and cured,

Wherein the first port groove has a first pocket which is recessed and formed along the inner diameter of the first through hole to receive and harden the urethane resin while adhering to the first terminal,

And the second port groove has a second pocket that is recessed and formed along an inner diameter of the second through hole to receive and cure the urethane resin while adhering and curing to the second terminal.

The present invention further includes a urethane potting part for filling a clearance between the first terminal and the first through hole and a gap between the second terminal and the second through hole to thoroughly prevent the leakage of positive ions, There is an effect that can be relatively increased.

The present invention can quickly and easily inject urethane resin into the first port grooves and the second port grooves which are relatively lowered by the volume jig protruding from the upper portion of the rubber front, So that a clean appearance can be guaranteed.

When the urethane resin is injected into the first port grooves and the second port grooves, it quickly flows into the first pocket and the second pocket and is filled tightly and tightly tightly with the first terminal and the second terminal, And the gap between the first through hole and the gap between the second terminal and the second through hole can be more thoroughly prevented and the lifetime can be further increased.

The present invention has an effect of enabling an aluminum oxide film to be formed by pre-anodizing an aluminum terminal, thereby ensuring a life span.

The present invention can lower the center of the volume jaw protruded to the upper portion of the rubber beforehand so as to have a concave portion so that even when the center of the volume jaw is increased during beading of the case, There is an effect that the terminal can be stably mounted when the terminal is connected.

The present invention has the effect of enhancing the interfacial bonding force of the urethane resin.

The present invention has the effect of maximizing the fixing force of the urethane resin.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the structure of a general electric double layer element. FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor, and more particularly,
3 is a circuit diagram for explaining the charging / discharging principle of an electric double layer capacitor applied to a general electric double layer device.
4 is a process diagram showing a manufacturing process of an electric double layer capacitor according to the prior art document.
5 is a view for explaining a method of manufacturing an integrated electric double layer capacitor according to the prior art document.
6 is a view for explaining a manufacturing process of an electrode element constituting an electric double layer capacitor according to the prior art document.
7 is a perspective view showing an electric double layer element according to the present invention.
8 is an exploded perspective view showing an electric double layer element according to the present invention.
9 is a longitudinal sectional view showing an electric double layer element according to the present invention.
10 is a view showing a winding electrode unit applied to an electric double layer element according to the present invention.
11 is a perspective view showing a first terminal and a second terminal applied to the electric double layer element according to the present invention.
12A is a perspective view showing a rubber sheath applied to an electric double layer element according to a preferred embodiment of the present invention.
12B is a cross-sectional view showing a rubber sheath applied to an electric double layer element according to a preferred embodiment of the present invention.

A preferred embodiment of the electric double layer device according to the present invention will be described with reference to the drawings, and there can be a plurality of embodiments thereof, and the objects, features and advantages of the present invention can be better understood through these embodiments .

FIG. 7 is a perspective view showing an electric double layer device according to the present invention, FIG. 8 is an exploded perspective view showing an electric double layer device according to the present invention, and FIG. 9 is a vertical sectional view showing an electric double layer device according to the present invention.

The electric double layer device according to the present invention comprises a winding electrode unit 11 having a first current collecting sheet 11 and a second current collecting sheet 12 which are wound while being separated by a separating sheet 13 as shown in Figs. A first terminal 21 and a second terminal 22 connected to the first current collecting sheet 11 and the second current collecting sheet 12 respectively and a case for accommodating the winding electrode unit 10 30 and a first through hole 41 and a second through hole 42 which are opened so as to pass through the first terminal 21 and the second terminal 22 while covering the case 30, (40). ≪ / RTI >

10 is a view showing a winding electrode unit applied to an electric double layer device according to the present invention.

The first current collecting sheet 11 and the second current collecting sheet 12 may be made of an aluminum foil coated with an electrode active material as shown in FIGS. 7 to 10, and may be utilized as a cathode current collector and a cathode current collector The electrode active material may be mainly composed of a conductive paste containing activated carbon as a main material. After impregnating the winding electrode unit 10 composed of the first current collector sheet 11 and the second current collector sheet 12 into the electrolyte solution, And the upper end of the case 30 toward the rubber plug 40 is beaded and curled to complete the coupling.

At this time, the first terminal 21 connected to the first current collecting sheet 11 used as the positive electrode current collector is connected to the second terminal 12 connected to the second current collecting sheet 12, 22) are written as negative terminal.

As a result of accelerated testing of the electric double layer device having such a structure at 2.7 V in a temperature environment of 60% relative humidity at 90%, a gap between the second terminal 22 used as the negative terminal and the second through hole 42 As the cation exits, it interacts with the external humidity and the wet phenomenon occurs, which limits the lifetime to about 1000 hours.

Accordingly, in the present invention, the urethane porting part 50 which covers the gap between the first terminal 21 and the first through hole 41 and the gap between the second terminal 22 and the second through hole 42, So that leaks of positive ions can be thoroughly prevented and the lifetime thereof can be relatively increased.

More specifically, the urethane porting portion 50 has a first through hole 41 through which the first terminal 21 and the second terminal 22 pass, and an upper portion 40 of the rubber electrical conductor 40 around the second through hole 42 The first port grooves 51 and the second port grooves 52 which are relatively lowered by the volume jaws 43 protruding from the first port grooves 51 and the second port grooves 52, And a urethane resin 53 which is filled and cured.

The urethane resin 53 can be quickly and easily introduced into the first port grooves 51 and the second port grooves 52 which are relatively lowered by the volume jaws 43 projected to the upper portion of the rubber drum 40 So that the workability is ensured and the phenomenon that the urethane resin 53 spreads to the periphery after the injection of the urethane resin 53 is minimized, thereby ensuring a clean appearance finish.

FIG. 12A is a perspective view showing a rubber front (after beading) applied to an electric double layer device according to a preferred embodiment of the present invention, FIG. 12B is a perspective view showing a rubber front Fig.

12A and 12B, the first port groove 51 is formed along the inner diameter of the first through hole 41 to receive the urethane resin 53, And the second port groove 52 is recessed along the inner diameter of the second through hole 42 to receive the urethane resin 53 and fill the second terminal 22 And a second pocket 52a for adhering and curing the second pockets 52a.

When the urethane resin 53 is introduced into the first port groove 51 and the second port groove 52, it quickly flows into the first and second pockets 51a and 52a, The first terminal 21 and the first through hole 41 and the gap between the second terminal 22 and the second through hole 42 by tightly adhering closely to the second terminal 22 and the second terminal 22, It is possible to prevent leakage of the positive ions more thoroughly and to increase the lifetime relatively more greatly.

In the electric double layer device according to the present invention, the volume jaw 43 protruded to the upper portion of the rubber drum 40 may have a concave portion 43a which is lowered toward the center and becomes flat when the case 30 is beaded .

When the case 30 is beaded for close contact between the case 30 and the rubber front 40, the side of the rubber front 40 is reduced while the upper end of the volume jaw 43 opposite to the winding electrode unit 10, When the first terminal 21 and the second terminal 22 are connected to the circuit board (not shown), the convex portion of the volume jaw 43 may fail to stably mount the first terminal 21 and the second terminal 22. [ .

The volume jaw 43 protruding from the upper portion of the rubber drum 40 may be lowered in advance to have the recess 43a so that the volume jaw 43 may be bent when the case 30 is beaded, So that the first terminal 21 and the second terminal 22 can be stably mounted on the circuit board when the first terminal 21 and the second terminal 22 are connected to each other.

On the other hand, the first port grooves 51 and the second port grooves 52 may have irregularities B for enhancing the interfacial bonding force of the urethane resin 53, 40 may be subjected to an arc discharge treatment or the surface of the mold may be subjected to a mechanical or chemical etching through a sand blast or sandblast.

In addition, after the primer adhesive is applied to the first port grooves 51 and the second port grooves 52, the urethane resin 53 can be filled to maximize the fixing force of the urethane resin 53, It is a matter of course that the primer adhesive can be an adhesive of Ethyl Acetate series.

The first terminal 21 and the second terminal 22 are connected to the first collecting sheet 11 and the second collecting sheet 12 and are connected to the first through hole 41 and the second through hole 42 An outer terminal T welded to the aluminum terminal A and exposed to the outside of the rubber electric terminal 40 (a terminal made of copper plating and tin plating on the iron terminal) In particular, the aluminum terminal (A) can be anodized to form the aluminum oxide film (A1).

The aluminum terminal (A) has a problem that it is easily oxidized and corroded. When it is corroded, the life time is shortened as well as accelerating leakage of positive ions, thereby increasing the self corrosion caused by the wet phenomenon.

In order to fundamentally obviate such a phenomenon, in the present invention, an aluminum oxide film (A1) is previously anodized to form an aluminum oxide film (A1), and the aluminum oxide film (A1) An electric double layer device to which the first terminal 21 and the second terminal 22 were applied was accelerated at 2.7 V in a temperature environment of 90% relative humidity and 60 캜. As a result, the lifetime could be extended to about 1500 hours, The electric double layer device according to the present invention applied up to the urethane porting part 50 was accelerated under the same conditions, and the lifetime could be extended to about 2500 hours.

The present invention can be applied to a device field for storing electric energy such as a battery, a capacitor, or an electrolytic capacitor.

10: winding electrode unit 11: first collecting sheet
12: second collecting sheet 13: separating sheet
21: Terminal 1 22: Terminal 2
A: aluminum terminal A1: aluminum oxide film
T: outer terminal 30: case
40: Rubber front 41: 1st through hole
42: second through hole 43: volume jaw
43a: concave portion 50: urethane port portion
51: first port groove 51a: first pocket
52: second port groove 52a: second pocket
B: unevenness 53: urethane resin

Claims (5)

A winding electrode unit having a first current collector sheet and a second current collector sheet wound while being separated by a separating sheet; first and second terminals respectively connected to the first current collector sheet and the second current collector sheet; An electric double layer including a rubber case having a first through hole and a second through hole pierced so as to expose the first and second terminals through the first terminal and the second terminal while covering the case, In the device,
And a urethane port portion for filling a gap between the first terminal and the first through hole exposed to the outside of the rubber container and a gap between the second terminal and the second through hole,
Wherein the urethane port portion has a first port groove and a second port hole, respectively, which are relatively lowered by volume protrusions protruding from the upper portion of the rubber around the first through hole and the second through hole through which the first terminal and the second terminal are passed, A second port groove, and a urethane resin filled in the first port groove and the second port groove and cured,
Wherein the first port groove has a first pocket which is recessed and formed along the inner diameter of the first through hole to receive and harden the urethane resin while adhering to the first terminal,
And the second port groove includes a second pocket which is recessed and formed along the inner diameter of the second through hole to receive and harden the urethane resin while closely adhering to the second terminal. The method according to claim 1,
Wherein the volume jaw protruded to the upper portion of the rubber has a concave portion which is lowered toward the center and then becomes flat when the case is beaded. 3. The method according to claim 1 or 2,
Wherein the first port grooves and the second port grooves have irregularities for enhancing an interfacial bonding force of the urethane resin. 3. The method according to claim 1 or 2,
Wherein the primer adhesive is applied to the first port grooves and the second port grooves, and then the urethane resin is filled. 5. The method of claim 4,
Wherein the primer adhesive is an Ethyl Acetate series adhesive.
KR1020160022392A 2015-04-09 2016-02-25 Electric double layer device KR101791894B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020160022392A KR101791894B1 (en) 2016-02-25 2016-02-25 Electric double layer device
JP2017552838A JP6723261B2 (en) 2015-04-09 2016-03-10 Electric double layer element
PCT/KR2016/002405 WO2016163647A1 (en) 2015-04-09 2016-03-10 Electric double-layer device
EP16776750.8A EP3282462A4 (en) 2015-04-09 2016-03-10 Electric double-layer device
US15/564,189 US10658128B2 (en) 2015-04-09 2016-03-10 Electric double-layer device

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Application Number Priority Date Filing Date Title
KR1020160022392A KR101791894B1 (en) 2016-02-25 2016-02-25 Electric double layer device

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KR1020170139043A Division KR20170121739A (en) 2017-10-25 2017-10-25 Electric double layer device

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KR20170100694A KR20170100694A (en) 2017-09-05
KR101791894B1 true KR101791894B1 (en) 2017-11-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009016720A (en) 2007-07-09 2009-01-22 Panasonic Corp Capacitor and manufacturing method thereof
KR101513965B1 (en) 2013-10-23 2015-04-21 비나텍주식회사 Capacitor module connected in series and method for fabricating the same
WO2016027470A1 (en) 2014-08-22 2016-02-25 日本ケミコン株式会社 Capacitor and manufacturing method therefor
KR101599711B1 (en) 2015-04-09 2016-03-07 주식회사 네스캡 Electric double layer device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009016720A (en) 2007-07-09 2009-01-22 Panasonic Corp Capacitor and manufacturing method thereof
KR101513965B1 (en) 2013-10-23 2015-04-21 비나텍주식회사 Capacitor module connected in series and method for fabricating the same
WO2016027470A1 (en) 2014-08-22 2016-02-25 日本ケミコン株式会社 Capacitor and manufacturing method therefor
KR101599711B1 (en) 2015-04-09 2016-03-07 주식회사 네스캡 Electric double layer device

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