WO2011122814A2 - Cellule électrochimique comprenant une membrane perméable aux gaz - Google Patents

Cellule électrochimique comprenant une membrane perméable aux gaz Download PDF

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Publication number
WO2011122814A2
WO2011122814A2 PCT/KR2011/002113 KR2011002113W WO2011122814A2 WO 2011122814 A2 WO2011122814 A2 WO 2011122814A2 KR 2011002113 W KR2011002113 W KR 2011002113W WO 2011122814 A2 WO2011122814 A2 WO 2011122814A2
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WO
WIPO (PCT)
Prior art keywords
permeable membrane
electrochemical cell
gas permeable
gas
support plate
Prior art date
Application number
PCT/KR2011/002113
Other languages
English (en)
Korean (ko)
Other versions
WO2011122814A3 (fr
Inventor
김성민
Original Assignee
킴스테크날리지 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 킴스테크날리지 주식회사 filed Critical 킴스테크날리지 주식회사
Publication of WO2011122814A2 publication Critical patent/WO2011122814A2/fr
Publication of WO2011122814A3 publication Critical patent/WO2011122814A3/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/16—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/12—Vents or other means allowing expansion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/164—Lids or covers characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an electrochemical cell provided with a gas permeable membrane, and more particularly, to an electrochemical cell equipped with a gas permeable membrane for miniaturizing an electrochemical cell such as a capacitor or a secondary battery and improving reliability and safety.
  • a conventional electrochemical cell such as a battery or a capacitor has a configuration as shown in FIG. 1.
  • FIG. 1 is a view schematically showing a structure of a unit cell of an electrochemical cell according to the prior art.
  • a unit cell of an electrochemical cell includes a positive electrode 11, a negative electrode 12, a separator 13, an electrolyte 14, and a positive terminal. 15), negative terminal (16) and case (case) 17.
  • the positive electrode 11 and the negative electrode 12 are composed of an active material and a current collector.
  • electrical energy is stored in the active material
  • the current collector is stored in the active material. Provide a route for energy transfer.
  • an activated carbon is mainly used as an active material, and an aluminum sheet is often used as a current collector.
  • the active material is mixed with a binder, a conducting agent, and a solvent to form a slurry or paste, and then applied to a current collector to form an electrode.
  • an electrode is formed by etching the aluminum sheet.
  • the electrolyte solution 14 is a mobile medium of ions for storing electrical energy in the active material.
  • the electrolyte solution 14 is essential for electrochemical or electrolytic cells such as batteries, electric double layer capacitors, and aluminum electrolytic capacitors, but is used for electrostatic cells such as film capacitors. It doesn't work.
  • the separator 13 is inserted between the positive electrode 11 and the negative electrode 12 to electrically insulate the positive electrode 11 and the negative electrode 12.
  • the separator 13 transmits ions of the liquid electrolyte, but a porous sheet such as paper or fiber, which is electrically insulator, is used.
  • the positive electrode terminal 15 and the negative electrode terminal 16 serve as a passage through which electrical energy is transferred to the electrochemical cell, and have various forms according to application fields.
  • the case 17 is to isolate the electrochemical cell from the outside and is made of various materials and shapes according to the type of electrochemical cell.
  • Such electrochemical cells may inevitably generate gas during operation.
  • gas When gas is generated, it may be transient as in a formation process like a lithium ion battery, and may be gradually generated over a long period, such as an electric double layer capacitor.
  • This gas generation increases the internal pressure of the electrochemical cell. Therefore, in consideration of the increase in the internal pressure of the electrochemical cell, a method of making the case 17 of the electrochemical cell rigid or arranging a free space inside the electrochemical cell is used so that the internal pressure does not rise to a predetermined value or more.
  • the gas generated inside is present on the surface of the electrolyte and the active material, thereby reducing the usable area and acting as an obstacle in the electrolyte, thereby increasing the resistance of the electrochemical It may lower the reliability of the cell.
  • gas generated through the gas permeable membrane may be discharged to the outside.
  • the gas permeable membrane may discharge the gas generated inside the electrochemical cell to the outside, whereas contaminants harmful to the electrochemical cell may be introduced into the electrochemical cell from the outside through the gas permeable membrane.
  • contaminants harmful to the electrochemical cell may be introduced into the electrochemical cell from the outside through the gas permeable membrane.
  • the electrochemical cell when the electrochemical cell is stored in a high humidity, moisture may flow into the electrochemical cell through the gas permeable membrane.
  • moisture has an adverse effect on the performance of the electrochemical cell.
  • contaminants harmful to the electrochemical cell may be introduced into the electrochemical cell through the gas permeable membrane.
  • the conventional electrochemical cell using a gas permeable membrane has a structural disadvantage of preventing contaminants from flowing from the outside into the inside.
  • an object of the present invention for solving the above problems is to provide an electrochemical cell having a high reliability and stability by preventing contaminants from entering the outside from the electrochemical cell through the gas permeable membrane.
  • an electrochemical cell includes an electrode in which electrical energy is stored, a case in which one or more holes are formed in which the electrode is stored and connected to the outside, a gas permeable membrane installed in the hole and And a gas permeable membrane support plate having a flow path provided on the gas permeable membrane.
  • the electrochemical cell according to the present invention having the above configurations not only smoothly discharges the gas generated therein to the outside through the gas permeable membrane, but also inhibits contaminants from being introduced into the electrochemical cell through the gas permeable membrane. It can improve the reliability and stability of the.
  • FIG. 1 is a view showing the structure of a unit cell of the electric energy storage device according to the prior art.
  • FIG. 2 is a perspective view showing the structure of a cylindrical electrochemical cell according to one embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of the cylindrical electrochemical cell shown in FIG.
  • FIGS. 2 and 3 are enlarged perspective views of the lid illustrated in FIGS. 2 and 3.
  • FIG. 5 is a structural diagram of the lid shown in FIG.
  • FIG. 6 is a view between the back of the lid showing a state in which the gas permeable membrane and the gas permeable membrane support plate are installed.
  • FIG. 2 is a perspective view schematically showing the structure of an electrochemical cell in which a gas permeable membrane is installed according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view of the cylindrical electrochemical cell shown in FIG. 2.
  • an electrochemical cell according to an embodiment of the present invention includes cases 21 and 24 and an electrode assembly 22.
  • the cases 21 and 24 have an accommodating space therein, and the electrode assembly 22 is accommodated in the accommodating space.
  • the cases 21 and 24 include a body 21 and a lid 24.
  • the body 21 has a cylindrical shape with an open top, and has a storage space in which the electrode assembly 22 is accommodated.
  • the lid 24 is formed in a circular shape so as to cover the upper portion of the body 21 in a state where the electrode assembly 22 is accommodated in the storage space of the body 21.
  • the electrode assembly 22 has a cylindrical shape and is housed in a storage space of the body 21, and is isolated from the outside by cases 21 and 24 formed of the body 21 and the lid 24.
  • Two terminals 25 are formed on the upper surface of the lid 24, and the two terminals 25 are electrically connected to the two leads 23 formed on the upper surface of the electrode assembly 22, respectively.
  • the lid 24 includes a hole penetrating the lid 24, a gas permeable membrane formed with a gas permeable membrane and a passage on the lower surface of the lid 24, and the gas permeable membrane from the lower surface of the lid.
  • a gas permeable membrane support plate (shown in FIG. 5) is installed to support it from being separated.
  • Figure 4 is an enlarged perspective view of the lid shown in Figures 2 and 3
  • Figure 5 is a rear perspective view showing the arrangement of the gas permeable membrane and the gas permeable membrane support plate installed on the lower surface of the lid shown in Figure 4
  • 6 is a rear perspective view of the lid showing a state in which the gas permeable membrane and the gas permeable membrane support plate shown in FIG. 5 are installed.
  • a first hole 27 is formed between two terminals 25 formed on an upper surface of a lid 24 according to an embodiment of the present invention, that is, a central portion of the upper surface.
  • the gas generated inside the electrochemical cell may be discharged to the outside through the hole 27.
  • a second hole 28 larger than the first hole 27 formed on the upper surface is formed to sufficiently cover the hole 28.
  • the membrane 61 is sealed by a first sealing means 63 such as a tape.
  • the second hole 28 is formed larger than the first hole 27 in order to prevent damage to the gas permeable membrane, but it is not necessary to make the second hole 28 larger.
  • the gas permeable membrane support plate 67 is provided on the lower surface of the gas permeable membrane 61 or the lid 24 using a second sealing means 65 such as a tape. At this time, the gas discharged to the outside of the electrochemical cell through the gas permeable membrane 61 is preferably provided with a gas permeable membrane support plate so as to pass through the third hole 29 formed in the gas permeable membrane support plate 67.
  • the gas permeable membrane 61 may be formed of fluorine resin, polyethylene terephthalate (PET), polyvinylidene chloride (PVDC), polyethylene (PE), polypropylene (PP), polyphenylene sulfate (PES), polyether ether ketone (PEEK), and polyimide (PI). Films can be used.
  • PET polyethylene terephthalate
  • PVDC polyvinylidene chloride
  • PE polyethylene
  • PP polypropylene
  • PES polyphenylene sulfate
  • PEEK polyether ether ketone
  • PI polyimide
  • the third hole 29 is formed in the center of the gas permeable membrane support plate 67 to form a flow path, and the gas permeable membrane support plate 67 is formed of a metal such as a plate made of metal or plastic, or a metal such as aluminum.
  • the film and the metal foil such as aluminum foil and the film may be made of the same material as the laminated lamination film or gas permeable membrane 61.
  • first and second sealing means 63 and 65 As the material of the first and second sealing means 63 and 65, a double-sided tape, an adhesive, a gasket, or the like may be used, and if the gas permeable membrane 61 or the gas permeable membrane 61 is heat-sealed, Fusion can replace the sealing means.
  • FIG. 7 is a cross-sectional view showing a cross-sectional view of the lid shown in Figures 4 and 5
  • Figures 8 to 10 are detailed views showing a detail of the portion A shown in Figure 7, the internal pressure and the external pressure of the electrochemical cell
  • Detailed diagrams show the deformation state of the gas permeable membrane according to the pressure difference.
  • FIG. 9 a state in which the gas permeable membrane 61 is expanded to the outside due to an increase in temperature of an electrochemical cell or an increase in internal pressure due to gas generation therein is shown.
  • an external pressure of the electrochemical cell is higher than an internal pressure.
  • the gas permeable membrane 61 is no longer pushed into the interior by the gas permeable membrane support plate 67.
  • the gas permeable membrane support plate 67 when the gas is discharged to the outside through the gas permeable membrane 61 due to the increase in the internal pressure of the electrochemical cell, the gas permeable membrane support plate 67 does not impede gas discharge.
  • the gas permeable membrane support plate 67 may reduce the effective area of the gas permeable membrane 61. It serves to reduce the area of the third hole (29). Therefore, the contaminants can be prevented from entering the inside of the electrochemical cell from the outside as much as possible.
  • the gas permeable membrane support plate 67 may be made of a hydrophilic material that is well wetted with the liquid electrolyte, or surface treated to have hydrophilicity such as corona discharge. It is more preferable if the liquid electrolyte is made of a hydrophobic material which is hard to get wet or if the inner surface of the gas permeable membrane 61 is surface treated to have hydrophobicity.
  • the gas permeable membrane support plate 67 having the third hole 29 is used as a method of forming a flow path in the gas permeable membrane support plate, but the gas permeable membrane support plate 67 without the hole is used. In this case, the same effect can be expected by forming a necessary flow path.
  • Gas generated inside the electrochemical cell flows through the flow path formed through the gap between the gas permeable membrane 61 and the gas permeable membrane support plate 67, and then is discharged through the gas permeable membrane 61.
  • the same effect as in the case of using the gas-permeable membrane support plate 67 with holes formed therein can be obtained.
  • the above embodiment selects the gas permeation direction of the gas permeable membrane 61 according to the expansion direction of the gas permeable membrane due to the difference between the internal pressure and the external pressure of the electrochemical cell, but the second gas permeable membrane 61 is installed.
  • the pressure at which the gas permeable membrane 61 is expanded can be arbitrarily set.
  • gas permeable membrane support plate 67 may also be used as a protective plate to prevent the gas permeable membrane 61 from being damaged during the manufacture or use of the electrochemical cell.
  • gas permeable membrane support plate in the form of a plate is exemplified in this embodiment, the same effect can be obtained by using the gas permeable membrane support membrane in the form of a film or the gas permeable membrane support sheet in the form of a sheet.
  • the present invention mainly used the electric double layer capacitor among the electrical energy storage device, the present invention is not limited to the electric double layer capacitor.
  • the present invention can be applied to a capacitor that does not use an electrolyte solution.
  • the present invention can be used in electrical energy storage devices such as capacitors such as electric double layer capacitors, aluminum electrolytic capacitors, film capacitors, batteries such as lead acid batteries, nickel-hydrogen batteries, nickel cadmium batteries, lithium ion batteries or fuel cells.
  • capacitors such as electric double layer capacitors, aluminum electrolytic capacitors, film capacitors, batteries such as lead acid batteries, nickel-hydrogen batteries, nickel cadmium batteries, lithium ion batteries or fuel cells.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

La présente invention concerne une cellule électrochimique comprenant une membrane perméable aux gaz. La taille de ladite cellule électrochimique, qui peut être une pile ou un condensateur, est réduite, et la fiabilité et la sécurité de la cellule électrochimique sont améliorées. Un boîtier de la cellule électrochimique présente un ou plusieurs trous en communication avec l'extérieur, la membrane perméable aux gaz est disposée de sorte à couvrir les trous, et une plaque support inférieure pourvue d'un trou est disposée au-dessus de la membrane perméable aux gaz. Ainsi, le gaz généré à l'intérieur de la cellule électrochimique est doucement évacué à travers la membrane perméable aux gaz, et l'humidité, qui est néfaste pour la cellule électrochimique, ou les contaminants provenant de l'extérieur, se voient dans le même temps empêchés d'entrer dans la cellule électrochimique en traversant la membrane perméable aux gaz. Ceci augmente par conséquent la fiabilité, et améliore la sécurité, de la cellule électrochimique.
PCT/KR2011/002113 2010-03-30 2011-03-28 Cellule électrochimique comprenant une membrane perméable aux gaz WO2011122814A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0028569 2010-03-30
KR1020100028569A KR20110109029A (ko) 2010-03-30 2010-03-30 가스투과막이 설치된 전기화학셀

Publications (2)

Publication Number Publication Date
WO2011122814A2 true WO2011122814A2 (fr) 2011-10-06
WO2011122814A3 WO2011122814A3 (fr) 2012-03-08

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WO (1) WO2011122814A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017128556A1 (de) * 2017-12-01 2019-06-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Lithium-Ionen-Zelle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103208597A (zh) * 2013-03-11 2013-07-17 山东三德电子科技有限公司 锂电池塑料外壳
KR102099905B1 (ko) * 2015-10-14 2020-04-10 주식회사 엘지화학 파우치형 이차전지 및 그 제조방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62122054A (ja) * 1985-11-21 1987-06-03 Matsushita Electric Ind Co Ltd 鉛蓄電池用液口栓
JPH1023226A (ja) * 1996-07-04 1998-01-23 Matsushita Electric Ind Co Ltd 画像読み取り装置
JPH1055793A (ja) * 1996-05-31 1998-02-24 Samsung Electron Devices Co Ltd 二次電池キャップアセンブリー
JP2003217549A (ja) * 2002-01-18 2003-07-31 At Battery:Kk 密閉型電池とその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62122054A (ja) * 1985-11-21 1987-06-03 Matsushita Electric Ind Co Ltd 鉛蓄電池用液口栓
JPH1055793A (ja) * 1996-05-31 1998-02-24 Samsung Electron Devices Co Ltd 二次電池キャップアセンブリー
JPH1023226A (ja) * 1996-07-04 1998-01-23 Matsushita Electric Ind Co Ltd 画像読み取り装置
JP2003217549A (ja) * 2002-01-18 2003-07-31 At Battery:Kk 密閉型電池とその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017128556A1 (de) * 2017-12-01 2019-06-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Lithium-Ionen-Zelle

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Publication number Publication date
KR20110109029A (ko) 2011-10-06
WO2011122814A3 (fr) 2012-03-08

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