KR101416805B1 - Folding cell and super capacitor folding type having the same - Google Patents
Folding cell and super capacitor folding type having the same Download PDFInfo
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- KR101416805B1 KR101416805B1 KR1020120033102A KR20120033102A KR101416805B1 KR 101416805 B1 KR101416805 B1 KR 101416805B1 KR 1020120033102 A KR1020120033102 A KR 1020120033102A KR 20120033102 A KR20120033102 A KR 20120033102A KR 101416805 B1 KR101416805 B1 KR 101416805B1
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- cell
- core plate
- sheet cell
- wound
- folding
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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
- 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
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- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a folding cell and a folding type super capacitor having the folding cell. The folding cell and the folding type supercap capacitor having the folding cell and the super- . The folding type supercapacitor according to the present invention includes a folding cell in which a sheet cell is wound and folded on a core plate, an electrolyte solution provided in the folding cell, a case in which the folding cell is sealed, and a cathode and an anode of the sheet cell, External terminals. At this time, the sheet cell is formed by sequentially stacking the first separator, the anode, the second separator, and the cathode, and is wound around the core plate a plurality of times.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a super capacitor, and more particularly, to a folding cell and a folding type super capacitor having the folding cell.
In addition to various portable electronic devices, there is a demand for electric power storage devices for electric vehicles and electric energy storage devices for systems for controlling or supplying instantaneous overload. Ni-MH A secondary battery such as a Ni-Cd battery, a lead-acid battery, and a lithium secondary battery, and a super capacitor, an aluminum electrolytic capacitor, and a ceramic capacitor having a high output density and close to unlimited charge / discharge life.
In particular, the super capacitor includes an electric double layer capacitor (EDLC), a pseudo capacitor, and a hybrid capacitor such as a lithium ion capacitor (LIC).
Here, the electric double layer capacitor is a capacitor using an electrostatic charge phenomenon occurring in an electric double layer formed at the interface of different phases, and has a faster charging / discharging speed, a higher charge / discharge efficiency than the battery in which the energy storage mechanism depends on the oxidation and reduction process, Is widely used for backup power supply, and the potential as an auxiliary power source for electric vehicles in the future is also unlimited.
A pseudocapacitor is a capacitor that converts a chemical reaction into electrical energy using an electrode and an oxidation-reduction reaction of the electrochemical oxide reactant. The pseudocapacitor has a storage capacity about 5 times larger than that of the electric double layer capacitor because the electric double layer capacitor can store the electric charge near the surface of the electrode material as compared with the electric double layer capacitor formed on the surface of the electrochemical double layer type electrode. As the metal oxide electrode material, RuOx, IrOx, MnOx and the like are used.
And the lithium ion capacitor is a new concept secondary battery system which combines the high output and long life characteristics of the existing electric double layer capacitors and the high energy density of the lithium ion battery. Electric double layer capacitors using the physical adsorption reaction of electric charges in the electric double layer have been limited in their application to various applications due to their low energy density despite excellent power characteristics and lifetime characteristics. As a means for solving the problem of such an electric double layer capacitor, a lithium ion capacitor using a carbon-based material capable of inserting and separating lithium ions as a negative electrode active material has been proposed. The lithium ion capacitor has a structure in which lithium ions, And the cell voltage can realize a high voltage of 3.8 V or more, which is much higher than that of the conventional electric double layer capacitor by 2.5 V, and can exhibit a high energy density.
The basic structure of such a supercapacitor is composed of an electrode, an electrolyte, a current collector, and a separator having a relatively large surface area such as a porous electrode. A voltage of several volts is applied to both ends of the unit cell electrode, And the electrochemical mechanism generated by adsorption on the surface of the electrode moves along the electric field. These cells are sealed to the upper and lower cases made of metal, and the upper and lower terminals are attached to the outer surfaces of the upper and lower cases.
Such a supercapacitor is manufactured and sold as a pouch type in which unit cells are laminated in a plate form and a winding type in which a sheet type cell is wound. In the case of the winding type super capacitor, a cell can be formed by winding in the form of a roll, and a cell (hereinafter, referred to as a folding cell) can be formed by winding in a folding form. Such a folding cell can be formed in a hexahedral shape.
However, in the folding cell, since the sheet-like cells are wound without using the core, the winding tension of the positive electrode and the negative electrode is different. As a result, the folded cell fabricated has a drawback that the winding shape is loosened, thereby causing a reduction in capacity, an increase in equivalent series resistance (ESR), and deterioration.
Further, since the folding cell is wound without using the core, there is a problem that the winding operation is also not easy.
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a folding cell that is easy to take up and a folding type super capacitor having the same.
It is another object of the present invention to provide a folding cell that maintains a folding type and a stable winding form, and a folding type super capacitor having the same.
It is still another object of the present invention to provide a folding cell and a folding type super capacitor having the folding cell, which can suppress loosening of the winding form after winding.
In order to achieve the above object, the present invention provides a folding cell in which a sheet-shaped cell is wound on a core plate, and a folding type super capacitor having the folding cell.
The present invention provides a folding cell for a folding supercapacitor including a core plate and a sheet cell which is wound on the core plate and folded. At this time, the sheet cell is formed by sequentially stacking a first separator, an anode, a second separator, and a cathode, and is wound on the core plate a plurality of times.
A folding cell for a folding type supercapacitor according to the present invention comprises a first bonding member for fixing one end of the sheet cell to the core plate and fixing the other end to the other end of the sheet cell wound on the core plate, And a second adhesive member attached to the sheet cell portion under the other end of the cell to fix the wound state of the sheet cell.
In the folding cell for a folding supercapacitor according to the present invention, the first and second adhesive members may be adhesive tapes.
A folding cell for a folding supercapacitor according to the present invention includes a plurality of positive electrode lead wires having a first end portion joined to the positive electrode and a first other end portion connected to the first end portion protruding out of the sheet cell, And a plurality of negative electrode leads connected to the negative electrode and protruding from the sheet cell at a second other end portion connected to the second end portion. At this time, when the sheet cell is wound on the core plate, the plurality of positive electrode leads and the plurality of negative electrode leads are arranged in a line, and the plurality of positive electrode leads and the plurality of negative electrode leads are spaced apart from each other.
In the folding cell for a folding supercapacitor according to the present invention, a material that does not react with the electrolyte electrochemically may be used as the material of the core plate. At this time, the material of the core plate may include at least one of Teflon, stainless steel, ceramics, a polymer material, and a porous material.
In the folding cell for a folding type supercapacitor according to the present invention, at least one hole may be formed in the core plate.
In the folding cell for a folding supercapacitor according to the present invention, the core plate may protrude from both the winding region where the sheet cell is wound and the winding region, And may include a gripping region that is gripped by a rotating member that rotates the core plate.
In the folding cell for a folding supercapacitor according to the present invention, the core plate may have a rectangular parallelepiped shape, and both edge portions may be rounded and convex in a direction in which the sheet cell is wound.
In the folding cell for a folding supercapacitor according to the present invention, the surface of the core plate on which the sheet cell is wound may be roughly formed to have a concave portion and a convex portion.
In the folding cell for a folding supercapacitor according to the present invention, the sheet cell wound on the core plate is arranged so that the cathode of the sheet cell contacts the surface of the core plate, The first separation membrane can be located.
The present invention also provides a folding type super capacitor including the aforementioned folding cell, electrolyte, case, and external terminal. Wherein the folding cell comprises a core plate and a sheet cell which is wound and folded on the core plate, wherein the sheet cell is formed by stacking a first separator, a cathode, a second separator, and a cathode in this order, Is wound. The electrolytic solution is provided in the folding cell. The case seals the folding cell. The external terminals are connected to the cathodes and the anodes of the seat cells and are exposed to the outside of the case.
Since the folding cell according to the present invention has a structure in which the sheet cell is wound on the core plate, the winding process can be easily performed, and a folding type and stable winding form can be maintained. Since the folding cell according to the present invention can firmly wind the sheet cell on the core plate, loosening of the winding form of the sheet cell after winding can be suppressed.
Therefore, the folding type supercapacitor having the folding cell according to the present invention can maintain the distance between the gaps close to each other, thereby increasing the capacity and lowering the ESR, thereby providing a highly reliable supercapacitor.
The folding type supercapacitor according to the present invention is advantageous in that the manufacturing yield of folding type supercapacitors can be improved because folding cells can be easily manufactured and the manufacturing time can be shortened.
1 is a perspective view showing a folding cell of a folding type super capacitor according to an embodiment of the present invention.
FIGS. 2 and 3 are views showing respective steps according to the manufacturing method of the folding cell of FIG.
4 is a view illustrating a folding type super capacitor having folding cells according to an embodiment of the present invention.
5 is a perspective view showing a core plate for a folding type supercapacitor according to another embodiment of the present invention.
In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.
The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view showing a folding cell of a folding type super capacitor according to an embodiment of the present invention. FIGS. 2 and 3 are views showing respective steps according to the manufacturing method of the folding cell of FIG.
1 to 3, a
Since the
The
The
The
Although not shown, the surface of the core plate can be roughened so that the
The
At this time, the first and
As the
As the
The
At least both end portions of the
Since the
The method of manufacturing the
First, as shown in Fig. 2, a
Next, as shown in Fig. 3, one end of the
Next, as shown in Fig. 3, the
1, after the
According to the manufacturing method of the
In the present embodiment, the other end of the
An example of the
Referring to FIG. 4, the
The electrolytic solution is provided so as to be impregnated in the
As the
As a material for the pouch, a composite material may be used from the viewpoints of downsizing and weight saving, and a laminate type composite film in which a polymer film such as aluminum and nylon, polypropylene or the like is laminated can be used.
In the case of a metal case, an aluminum case can be used. The metal case is formed with an inlet through which the folding cell can be inserted. The opening is covered with a sealing rubber, and then the upper part of the metal case is deformed to seal the inner space accommodating the folding cell.
The
In this embodiment, the
5 is a perspective view showing a
Referring to FIG. 5, a
In another embodiment of the present invention, an example in which one
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention, and are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.
10: core plate
12: Winding area
14:
16: hole
20: Seat cell
21: first separator
23: anode
24: Positive lead wire
25: Second separation membrane
26: Negative electrode lead wire
27: cathode
31: first adhesive member
33: second adhesive member
40: folding cell
50: Case
61: positive terminal
63: negative terminal
100: Folding type super capacitor
Claims (12)
And a sheet cell formed by sequentially stacking a first separator, a cathode, a second separator, and a cathode, and wound on the core plate a plurality of times,
A first adhesive member attaching and fixing one end of the sheet cell to the core plate;
And a second adhesive member attached to the other end of the sheet cell wound on the core plate and the sheet cell portion below the other end of the wound sheet cell to fix the wound state of the sheet cell,
The surface of the core plate on which the sheet cell is wound is roughly formed to have a concave portion and a convex portion,
Wherein the convex portion is formed to be inclined in a direction in which the sheet cell is wound.
Wherein the first and second adhesive members are adhesive tapes.
A plurality of positive electrode lead wires having a first end portion joined to the positive electrode and a first other end portion connected to the first end portion protruding from the sheet cell;
And a plurality of negative electrode lead wires having a second end portion joined to the negative electrode and a second end portion connected to the second end portion protruding from the sheet cell,
Wherein when the sheet cell is wound on the core plate, the plurality of positive electrode leads and the plurality of negative electrode leads are arranged in a line, and the plurality of positive electrode leads and the plurality of negative electrode leads are spaced apart from each other. Folding cells for capacitors.
Wherein the material of the core plate is a material that does not electrochemically react with the electrolyte. ≪ RTI ID = 0.0 > 11. < / RTI >
Wherein the core plate includes at least one of Teflon, Stainless Steel, Ceramic, Polymer, and Porous.
Wherein at least one hole is formed in the core plate. ≪ RTI ID = 0.0 > 11. < / RTI >
A winding region in which the sheet cell is wound;
A gripping region protruded on both sides of the winding region and gripped by a rotating member for rotating the core plate to wind the sheet cell on the core plate;
And a second electrode connected to the second electrode.
Wherein the sheet cell has a rectangular parallelepiped shape, and both edge portions of the folding cell are rounded and convex in a direction in which the sheet cell is wound.
Wherein a cathode of the sheet cell is in contact with a surface of the core plate and a first separating film of the sheet cell is located outside the wound sheet cell.
A folding cell having a sheet cell which is formed by sequentially stacking a first separator, an anode, a second separator, and a cathode, and which is wound on the core plate a plurality of times;
An electrolytic solution provided in the folding cell;
A case for sealing the folding cell;
And external terminals connected to the cathodes and the anodes of the seat cells and exposed to the outside of the case,
A first adhesive member attaching and fixing one end of the sheet cell to the core plate;
And a second adhesive member attached to the other end of the sheet cell wound on the core plate and the sheet cell portion below the other end of the wound sheet cell to fix the wound state of the sheet cell,
The surface of the core plate on which the sheet cell is wound is roughly formed to have a concave portion and a convex portion,
Wherein the convex portion is formed to be inclined in a direction in which the sheet cell is wound. ≪ RTI ID = 0.0 > 11. < / RTI >
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120033102A KR101416805B1 (en) | 2012-03-30 | 2012-03-30 | Folding cell and super capacitor folding type having the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020120033102A KR101416805B1 (en) | 2012-03-30 | 2012-03-30 | Folding cell and super capacitor folding type having the same |
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KR20130116466A KR20130116466A (en) | 2013-10-24 |
KR101416805B1 true KR101416805B1 (en) | 2014-07-09 |
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KR1020120033102A KR101416805B1 (en) | 2012-03-30 | 2012-03-30 | Folding cell and super capacitor folding type having the same |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11721494B2 (en) | 2017-02-20 | 2023-08-08 | The Research Foundation For The State University Of New York | Multi-cell multi-layer high voltage supercapacitor apparatus including graphene electrodes |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3447781B1 (en) * | 2016-04-21 | 2022-07-06 | LS Materials Co., Ltd. | Low-resistance ultra capacitor |
CN114865238B (en) * | 2022-04-22 | 2023-08-22 | 合肥国轩高科动力能源有限公司 | Lithium battery |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0366076U (en) * | 1989-10-31 | 1991-06-27 | ||
KR20030006597A (en) * | 2001-07-13 | 2003-01-23 | 주식회사 네스캡 | Electric Energy Storage System |
KR100967504B1 (en) * | 2005-12-01 | 2010-07-07 | 파나소닉 주식회사 | Wound electric double-layer capacitor |
-
2012
- 2012-03-30 KR KR1020120033102A patent/KR101416805B1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0366076U (en) * | 1989-10-31 | 1991-06-27 | ||
KR20030006597A (en) * | 2001-07-13 | 2003-01-23 | 주식회사 네스캡 | Electric Energy Storage System |
KR100967504B1 (en) * | 2005-12-01 | 2010-07-07 | 파나소닉 주식회사 | Wound electric double-layer capacitor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11721494B2 (en) | 2017-02-20 | 2023-08-08 | The Research Foundation For The State University Of New York | Multi-cell multi-layer high voltage supercapacitor apparatus including graphene electrodes |
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