WO2022010237A1 - 이차전지 - Google Patents
이차전지 Download PDFInfo
- Publication number
- WO2022010237A1 WO2022010237A1 PCT/KR2021/008602 KR2021008602W WO2022010237A1 WO 2022010237 A1 WO2022010237 A1 WO 2022010237A1 KR 2021008602 W KR2021008602 W KR 2021008602W WO 2022010237 A1 WO2022010237 A1 WO 2022010237A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cover
- secondary battery
- battery case
- case
- exhaust hole
- Prior art date
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Images
Classifications
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
-
- 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
- H01M50/105—Pouches or flexible bags
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
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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
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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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
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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
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- H01M50/121—Organic material
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- H01M50/10—Primary casings; Jackets or wrappings
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- H01M50/148—Lids or covers characterised by their shape
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- H—ELECTRICITY
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- 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
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
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- H—ELECTRICITY
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- H—ELECTRICITY
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- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
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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
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a secondary battery.
- Secondary batteries unlike primary batteries, can be recharged, and have been widely researched and developed in recent years due to their small size and large capacity. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.
- the secondary battery is classified into a coin-type battery, a cylindrical battery, a prismatic battery, and a pouch-type battery according to the shape of the battery case.
- an electrode assembly mounted inside a battery case is a charging/discharging power generating element having a stacked structure of an electrode and a separator.
- the electrode assembly is a sheet-type sheet-type electrode assembly coated with an active material, with a separator interposed between the positive electrode and the negative electrode, and is a jelly-roll type, and a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed therebetween. , and stacked unit cells can be roughly classified into a stack/folding type in which a long-length separation film is wound.
- the defect rate due to gas generation is expected to accelerate as the energy density of the secondary battery increases.
- Patent Document Korean Patent Laid-Open No. 10-2014-0015647
- One aspect of the present invention is to provide a secondary battery capable of discharging internal gas while minimizing moisture penetrating from the outside.
- a secondary battery includes an electrode assembly in which electrodes and separators are alternately stacked, a battery case in which an accommodating part is formed in which the electrode assembly is accommodated, a sealing part is formed along an outer circumferential surface, and one side is a accommodating part of the battery case is connected to and the other side is connected to the outside of the battery case, is connected to a connection pipe passing through the sealing part of the battery case, and the other side of the connection pipe, and is located on the outside of the battery case, the battery case It may include an aroma valve that is opened when the internal pressure is higher than a predetermined pressure and discharges the internal gas.
- the battery pack according to the embodiment of the present invention may include the secondary battery according to the embodiment of the present invention.
- the aroma valve by connecting the aroma valve through a connection pipe penetrating the sealing part of the battery case, it is possible to discharge the internal gas while minimizing moisture penetrating from the outside.
- FIG. 1 is a plan view showing a secondary battery according to a first embodiment of the present invention.
- FIG. 2 is a side view showing a secondary battery according to a first embodiment of the present invention.
- FIG. 3 is a cross-sectional view taken along line B-B' in FIG. 1 .
- FIG. 4 is a perspective view showing a connector and an aroma valve in the secondary battery according to the first embodiment of the present invention.
- FIG. 5 is a cross-sectional view illustrating a secondary battery according to a first embodiment of the present invention.
- FIG. 6 is a cross-sectional view showing an aroma valve in the secondary battery according to the first embodiment of the present invention.
- FIG. 7 is a plan view illustrating a secondary battery according to a second embodiment of the present invention.
- FIG. 8 is a cross-sectional view illustrating an aroma valve in a secondary battery according to a second embodiment of the present invention.
- FIG. 9 is an enlarged cross-sectional view of area A in FIG. 8 .
- FIG. 10 is a plan view illustrating an aroma valve in a secondary battery according to a second embodiment of the present invention.
- FIG. 11 is a cross-sectional view taken along line A-A' in FIG. 10 .
- FIG. 12 is a plan view illustrating a secondary battery according to a third embodiment of the present invention.
- FIG. 13 is a cross-sectional view illustrating an aroma valve in a secondary battery according to a third embodiment of the present invention.
- FIG. 1 is a plan view showing a secondary battery according to a first embodiment of the present invention
- FIG. 2 is a side view showing a secondary battery according to a first embodiment of the present invention
- FIG. 3 is a cutaway along line BB' in FIG. It is a cross-sectional view
- FIG. 4 is a perspective view showing a connector and an aroma valve in the secondary battery according to the first embodiment of the present invention.
- the secondary battery 100 includes an electrode assembly 120 in which electrodes and separators are alternately stacked and wound, and an accommodation in which the electrode assembly 120 is accommodated.
- the battery case 110 in which the part 114 is formed, the connecting pipe 140 having one side connected to the receiving part 114 of the battery case 110 , and the aroma valve 150 connected to the other side of the connecting pipe 140 . ) is included.
- FIG. 5 is a cross-sectional view illustrating a secondary battery according to a first embodiment of the present invention.
- the electrode assembly 120 is a power generating element capable of charging and discharging, and the electrode 113 and the separator 114 are assembled to form a structure in which they are alternately stacked.
- the electrode 113 may include an anode 111 and a cathode 112 .
- the separator 114 separates the anode 111 and the cathode 112 to electrically insulate them.
- the positive electrode 111 may include a positive electrode current collector, a positive electrode active material portion that is a region formed by laminating a positive electrode active material on the positive electrode current collector, and a positive electrode uncoated region that is an area on which a positive electrode active material is not stacked.
- the positive electrode active material part may form the positive electrode holding part.
- the positive electrode current collector may be made of, for example, an aluminum foil.
- the positive active material may be formed of lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, or a compound or mixture containing at least one of them.
- the negative electrode 112 may include a negative electrode current collector, a negative electrode active material portion that is an area formed by laminating a negative electrode active material on the negative electrode collector, and an anode uncoated portion that is an area where the negative electrode active material is not stacked.
- the negative electrode active material part may form the negative electrode holding part.
- the negative electrode current collector may be made of, for example, a foil made of a copper (Cu) or nickel (Ni) material.
- the negative active material may be made of, for example, artificial graphite, lithium metal, lithium alloy, carbon, petroleum coke, activated carbon, graphite, a silicon compound, a tin compound, a titanium compound, or an alloy thereof.
- the negative active material may further include, for example, non-graphite-based SiO (silica, silica) or SiC (silicon carbide, silicon carbide).
- the separator 114 may be made of an insulating material to insulate between the anode 111 and the cathode 112 .
- the separator 114 is a multilayer film made of, for example, microporous polyethylene, polypropylene, or a combination thereof, or polyvinylidene fluoride, polyethylene oxide, polyacrylonitrile, or polyvinylidene fluoride hexa It may be a polymer film for a solid polymer electrolyte such as a fluoropropylene copolymer or for a gel polymer electrolyte.
- the secondary battery 100 may further include an electrode lead 130 electrically connecting the electrode assembly 120 to the outside.
- One side of the electrode lead 130 may be connected to the electrode, and the other side may extend to the outside of the battery case 110 .
- the electrode lead 130 may include a positive electrode lead connected to the positive electrode and a negative electrode lead connected to the negative electrode.
- the receiving part 114 in which the electrode assembly 120 is accommodated is formed, and the sealing part 115 is formed along the outer peripheral surface 113 .
- the thickness a of the sealing part 115 may be, for example, 10 mm or less.
- the thickness (a) of the sealing part 115 may be, specifically, for example, 1 mm or less.
- the battery case 110 may include an upper case 111 and a lower case 112 .
- the surfaces facing each other on the outer peripheral surfaces 111a and 112a of the upper case 111 and the lower case 112 may include a PP (Polypropylene, Polypropylene) material.
- the sealing part 115 may be heat-sealed to each other by applying heat to and pressing the outer peripheral surfaces 111a and 112a of the upper case 111 and the lower case 112 .
- the connector 140 has one side connected to the receiving part 114 of the battery case 110 , and the other side connected to the outside of the battery case 110 , and the battery case 110 . ) may pass through the sealing part 115 .
- the connector 140 passes between the outer peripheral surfaces 111a and 112a of the upper case 111 and the lower case 112 in the battery case 110 , and the outer surface of the connector 140 is the upper case 111 . And it may be sealed together with the outer peripheral surfaces (111a, 112a) of the lower case (112).
- the connection pipe 140 has a discharge passage 141 connecting the receiving part 114 of the battery case 110 and the aroma valve 150 on the inside is formed, and the receiving part 114 of the battery case 110 is formed.
- the internal gas located in the aroma valve 150 may be moved in the direction.
- the connector 140 may include a PP (Polypropylene, polypropylene) material on the outer surface.
- the outer surface of the connector 140 may be made of a PP material.
- the outer surface of the connecting pipe 140 is made of PP material, so that when sealing the outer peripheral surfaces 111a and 112a of the upper case 111 and the lower case 112, a smooth sealing is performed, and the sealing property can be improved. That is, the surfaces facing each other between the connector pipe 140 and the outer circumferential surface 113 of the battery case 110 are made of the same or similar material so that sealing is possible, sealing is easy, and sealing is remarkably strong. .
- FIG. 6 is a cross-sectional view showing an aroma valve in the secondary battery according to the first embodiment of the present invention.
- the cap 155 omitted in FIGS. 3 and 5 is further illustrated.
- the aroma valve 150 is connected to the other side of the connection pipe 140 , and is located on the outside of the battery case 110 , so that the internal pressure of the battery case 110 is greater than or equal to a certain pressure When it is opened, the internal gas can be discharged.
- the constant pressure may be, for example, a pressure larger than the internal pressure of a typical pouch battery and smaller than the venting pressure.
- the predetermined pressure may be specifically, for example, 0.01 atmosphere (atm) or more.
- the constant pressure may be more specifically, for example, 0.05 atmospheres (atm) or more.
- the aroma valve 150 includes, for example, the body 151 having the exhaust hole 151a formed therein, the cover 152 provided on the outer surface of the body 151 to cover the exhaust hole 151a, and the body 151 . and an adhesive 154 provided between the cover 152 and the body 151 to adhere the cover 152 to the body 151 .
- the aroma valve 150 may further include a cap 155 on the outside of the cover 152 to prevent separation of the cover 152 as another example. In this case, a cap hole 155a may be formed in the cap 155 to facilitate gas discharge.
- the space between the body 151 and the cover 152 is opened and the internal gas may be discharged to the outside.
- the aroma valve 150 may be provided vertically with respect to the connection pipe (140).
- the exhaust hole 151a of the aroma valve 150 may extend vertically with respect to the internal discharge passage 141 of the connection pipe 140 formed in the longitudinal direction of the connection pipe 140 . Accordingly, by positioning the aroma valve 150 vertically with respect to the connection pipe 140 , the air permeation area of the aroma valve 150 may be maximally secured. That is, when the aroma valve 150 is mounted in a direction parallel to the sealing part 115 having a narrow width and a long length, it is possible to overcome the limitation in which the gas permeation characteristic is lowered.
- the width d of the exhaust hole 151a of the aroma valve 150 may be greater than the width c of the discharge passage 141 of the connection pipe 140 .
- the width (b) of the aroma valve 150 may be formed to be 10mm or more.
- the adhesive 154 may include silicone oil.
- the secondary battery 100 according to the first embodiment of the present invention configured as described above has an aroma valve 150 through which fluid flows in only one direction through the connection pipe 140 penetrating the sealing part 115 of the battery case 110 . ), it is possible to discharge the internal gas to the outside while minimizing the moisture penetrating from the outside.
- connection pipe 140 by sealing the connection pipe 140 together with the sealing part 115 located on the outer circumferential surface 113 of the battery case 110 that is sealed by applying heat and connecting the aroma valve 150 to the connection pipe 140, When the aroma valve 150 is installed to directly penetrate the receiving unit 114 , it is possible to prevent damage to the battery case 110 surrounding the receiving unit 114 by heat.
- FIG. 7 is a plan view showing a secondary battery according to a second embodiment of the present invention
- FIG. 8 is a cross-sectional view showing an aroma valve in a secondary battery according to a second embodiment of the present invention
- FIG. 9 is a region A in FIG. It is an enlarged cross-sectional view.
- the secondary battery 200 includes an electrode assembly in which electrodes and separators are alternately stacked and wound, and a battery case 110 in which a receiving part for accommodating the electrode assembly is formed. , a connecting pipe 140 having one side connected to the receiving part of the battery case 110 , and an aroma valve 250 connected to the other side of the connecting pipe 140 .
- the secondary battery 200 according to the second embodiment of the present invention is different from the electrode assembly according to the first embodiment described above in the embodiment of the aroma valve 250 . Accordingly, in the present embodiment, content overlapping with the first embodiment will be omitted or briefly described, and the differences will be mainly described.
- connection pipe 140 has one side connected to the receiving part of the battery case 110 , and the other side connected to the outside of the battery case 110 , and passes through the sealing part 115 of the battery case 110 . can do.
- the connector 140 may include a PP (Polypropylene, Polypropylene) material.
- the outer surface of the connector 140 may be made of a PP material.
- the surface facing the connector 140 on the outer peripheral surface 113 of the battery case 110 may include a PP (Polypropylene, Polypropylene) material.
- FIG. 10 is a plan view showing an aroma valve in a secondary battery according to a second embodiment of the present invention
- FIG. 11 is a cross-sectional view taken along line A-A' in FIG. 10 .
- FIG. 11 exemplarily shows an open state of the aroma valve.
- FIG. 10 is a plan view of FIG. 11 viewed from above, and for convenience, the adhesive portion 253a is shown after removing the elastic member 253 .
- the aroma valve 250 is connected to the other side of the connection pipe 140 , and is located outside the battery case 110 , so that the internal pressure of the battery case 110 is It is opened when the pressure is higher than a certain pressure, and internal gas can be discharged.
- the aroma valve 250 surrounds the body 251 having the exhaust hole 251a formed therein, the cover 252 provided on the outer surface of the body 251 to cover the exhaust hole 251a, and the cover 252 .
- the back end is fixed to the body 251 and may include an elastic member 253 for fixing the cover 252 to the body 251 by an elastic force.
- the cover 252 and the body 251 are spaced apart and the exhaust hole 251a is opened to discharge the internal gas, and the internal gas
- the cover 252 and the body 251 may be in close contact with each other by the restoring force of the elastic member 253 to seal the exhaust hole 251a.
- the elastic member 253 is a natural rubber, poly-isoprene-based material, PVDF (polyvinylidene fluoride, polypropylene), PVF (polyvinyl fluoride), PHB (poly-3-hydroxybutrate), PVA (poly vinyl acetate), PCTFE (polychlorotrifluoroethylene), It may be made of a material containing at least one of polyamide, polyactic acid, polyethylene terephthalate, polyvinylchloride, polyvinyl alcohol, polystyrene, poly methyl methacrylate (PMMA), polytetrafluoroethlene (PTFE), poly carbonate, and polysulfone, polynorbone.
- PVDF polyvinylidene fluoride
- PVF polyvinyl fluoride
- PHB poly-3-hydroxybutrate
- PVA poly vinyl acetate
- PCTFE polychlorotrifluoroethylene
- It may be made of a material containing at least one of poly
- the elastic member 253 is adhered to the outer surface of the cover 252, a portion is non-adhesive to form a passage through which the internal gas is discharged.
- the elastic member 253 may include an adhesive portion 253a attached to the outer surface of the cover 252 and a non-adhesive portion 253b that is not attached to the outer surface of the cover 252 .
- the non-adhesive portion 253b may be formed along the side and upper surfaces of the cover 252 to form a passage through which the gas is discharged.
- an end of the adhesive part 253a may be fixed to the body 251
- an end of the non-adhesive part 253b may be non-fixed to the body 251 . That is, for example, an end of the adhesive portion 253a may be adhered to the body 251 , and an end of the non-adhesive portion 253b may be non-adhered to the body 251 .
- the cover 252 when the internal pressure is greater than the elastic force of the elastic member 253, the cover 252 is moved upwards, the body 251 and the cover 252 are spaced apart, and the non-adhesive part 253b is removed from the exhaust hole 251a. Accordingly, the internal gas may be discharged to the outside.
- the aroma valve 250 may further include an O-ring 255 provided between the cover 252 and the body 251 . Accordingly, the sealing property between the cover 252 and the body 251 through the O-ring 255 can be significantly increased.
- the aroma valve 250 may be provided vertically with respect to the connection pipe 140 .
- the exhaust hole 251a of the aroma valve 250 may extend vertically with respect to the internal discharge passage 141 of the connection pipe 140 formed in the longitudinal direction of the connection pipe 140 .
- FIG. 12 is a plan view illustrating a secondary battery according to a third embodiment of the present invention
- FIG. 13 is a cross-sectional view showing an aroma valve in the secondary battery according to the third embodiment of the present invention.
- an electrode assembly according to a third embodiment of the present invention includes an electrode assembly in which electrodes and a separator are alternately stacked and wound, a battery case 110 having a receiving part for accommodating the electrode assembly, one side It includes a connecting pipe 140 connected to the receiving part of the additional battery case 110 , and an aroma valve 350 connected to the other side of the connecting pipe 140 .
- the secondary battery 300 according to the third embodiment of the present invention is different from the secondary battery according to the first and second embodiments described above in the embodiment of the aroma valve 350 . Accordingly, in the present embodiment, content overlapping with the above-described embodiments will be omitted or briefly described, and differences will be mainly described.
- the connector 140 has one side connected to the receiving part of the battery case 110 , and the other side connected to the outside of the battery case 110 , and passes through the sealing part 115 of the battery case 110 . can do.
- the connector 140 may include a PP (Polypropylene, Polypropylene) material.
- the outer surface of the connector 140 may be made of a PP material.
- the surface facing the connector 140 on the outer peripheral surface 113 of the battery case 110 may include a PP (Polypropylene, Polypropylene) material.
- the aroma valve 350 is connected to the other side of the connection pipe 140, is located on the outside of the battery case 110, is opened when the internal pressure of the battery case 110 is greater than a certain pressure, the internal gas can be discharged have.
- Aroma valve 350 is a body 351 having an exhaust hole 351a formed thereon, a cover 352 provided on the outer surface of the body 351 to cover the exhaust hole 351a, and the cover 352 is wrapped around the end of the body 351 It is fixed to the body 351, the elastic member 353 for fixing the cover 352 to the body 351, and is provided between the body 351 and the cover 352, the cover 352 to the body 351 and A pressure-sensitive adhesive 354 for adhesion may be included.
- the space between the cover 352 and the body 351 is opened to discharge the internal gas, and after the gas is discharged, the interior of the battery case 110 .
- the space between the cover 352 and the body 351 may be sealed by the restoring force of the elastic member 353 .
- the elastic member 353 may include natural rubber, poly-isoprene-based material, polyvinylidene fluoride (polypropylene) (PVDF), polyvinyl fluoride (PVF), poly-3-hydroxybutrate (PHB), poly vinyl acetate (PVA), polychlorotrifluoroethylene (PCTFE), It may be made of a material containing at least one of polyamide, polyactic acid, polyethylene terephthalate, polyvinylchloride, polyvinyl alcohol, polystyrene, poly methyl methacrylate (PMMA), polytetrafluoroethlene (PTFE), poly carbonate, and polysulfone, polynorbone.
- PVDF polyvinylidene fluoride
- PVF polyvinyl fluoride
- PHB poly-3-hydroxybutrate
- PVA poly vinyl acetate
- PCTFE polychlorotrifluoroethylene
- It may be made of a material containing at least one of polyamide,
- the elastic member 353 is adhered to the outer surface of the cover 352 , and a portion thereof is non-adhesive to form a passage through which the internal gas is discharged.
- the adhesive 354 may include silicone oil. Accordingly, the sealing property between the cover 352 and the body 351 may be further improved. That is, it is double sealed between the cover 352 and the body 351 through the elastic member 353 and the pressure-sensitive adhesive 354 , and sealing properties can be remarkably improved.
- the aroma valve 350 may be provided vertically with respect to the connection pipe 140 .
- the exhaust hole 351a of the aroma valve 350 may extend vertically with respect to the internal discharge passage 141 of the connection pipe 140 formed in the longitudinal direction of the connection pipe 140 .
- the elastic member 353 is adhered to the outer surface of the cover 352 , and a portion thereof is non-adhesive to form a passage through which the internal gas is discharged.
- a membrane 360 may be further included on the exhaust hole 351a of the aroma valve 350 for gas permeation and for blocking liquid permeation. Accordingly, it is possible to more effectively prevent external moisture and air from flowing into the secondary battery 300 .
- the membrane 360 may be made of a hydrophobic material. Accordingly, the membrane 360 has a micropore size and is made of a hydrophobic material to better block the liquid from passing through the micropores.
- a battery pack including any one or more of the secondary batteries according to the first to third embodiments of the present invention may be configured.
- the battery pack may be configured by electrically connecting a plurality of secondary batteries and accommodating them in a case.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (16)
- 전극 및 분리막이 교대로 적층된 전극 조립체;상기 전극 조립체가 수용되는 수용부가 형성되고, 외주면을 따라 실링부가 형성된 전지 케이스;일측부가 상기 전지 케이스의 수용부와 연결되고 타측부는 상기 전지 케이스의 외부와 연결되며, 상기 전지 케이스의 실링부를 관통하는 연결관; 및상기 연결관의 타측부와 연결되고, 상기 전지 케이스의 외측에 위치되어, 상기 전지 케이스의 내부 압력이 일정 압력 이상일 때 개방되며 내부 가스가 배출되는 아로마 밸브를 포함하는 이차전지.
- 청구항 1에 있어서,상기 연결관은 외면에 PP(Polypropylene, 폴리프로필렌) 재질을 포함하는 이차전지.
- 청구항 2에 있어서,상기 전지 케이스는 상부 케이스 및 하부 케이스를 포함하고,상기 상부 케이스 및 상기 하부 케이스의 외주면에서 상호 마주보는 면은 PP(Polypropylene, 폴리프로필렌) 재질을 포함하며,상기 연결관은 상기 상부 케이스 및 상기 하부 케이스의 외주면 사이를 관통하고,상기 연결관의 외면은 상기 상부 케이스 및 상기 하부 케이스의 외주면과 함께 실링된 이차전지.
- 청구항 1에 있어서,상기 아로마 밸브는배기홀이 형성된 몸체;상기 배기홀을 덮도록 상기 몸체의 외측면에 구비된 덮개; 및상기 몸체와 상기 덮개 사이에 구비되어 상기 덮개를 상기 몸체와 점착시키는 점착제를 포함하는 이차전지.
- 청구항 4에 있어서,상기 점착제는 실리콘 오일을 포함하는 이차전지.
- 청구항 1에 있어서,상기 아로마 밸브는배기홀이 형성된 몸체;상기 배기홀을 덮도록 상기 몸체의 외측면에 구비된 덮개; 및상기 덮개를 감싸되 단부는 상기 몸체에 고정되며, 탄성력에 의하여 상기 덮개를 상기 몸체에 고정시키는 탄성부재를 포함하는 이차전지.
- 청구항 6에 있어서,상기 전지 케이스의 내부 압력이 상기 탄성부재의 탄성력 보다 크게 될 때, 상기 덮개와 상기 몸체 사이가 이격되며 상기 배기홀이 개방되어 내부 가스가 배출되고,상기 내부 가스 배출 후 상기 전지 케이스의 내부 압력이 낮아지면 상기 탄성부재의 복원력에 의해 상기 덮개와 상기 몸체 사이가 밀착되어 상기 배기홀이 밀폐되는 이차전지.
- 청구항 6에 있어서,상기 탄성부재는천연 고무, poly-isoprene계 물질, PVDF(polyvinylidene fluoride, polypropylene), PVF(polyvinyl fluoride), PHB(poly-3-hydroxybutrate), PVA(poly vinyl acetate), PCTFE(polychlorotrifluoroethylene), polyamide, polyactic acid, polyethylene terephthalate, polyvinylchloride, polyvinyl alcohol, polystyrene, PMMA(poly methyl methacrylate), PTFE(polytetrafluoroethlene), poly carbonate, 및 polysulfone, polynorbone 중에서 적어도 어느 하나 이상을 포함하는 재질로 이루어지는 이차전지.
- 청구항 6에 있어서,상기 탄성부재는상기 덮개의 외면에 접착되되, 일부가 비접착되어 내부 가스가 배출되는 통로를 형성하는 이차전지.
- 청구항 6에 있어서,상기 아로마 밸브는상기 덮개와 상기 몸체 사이에 구비되는 오링(O-ring)을 더 포함하는 이차전지.
- 청구항 6에 있어서,상기 아로마 밸브는상기 몸체와 상기 덮개 사이에 구비되어 상기 덮개를 상기 몸체와 점착시키는 점착제를 더 포함하는 이차전지.
- 청구항 11에 있어서,상기 점착제는 실리콘 오일을 포함하는 이차전지.
- 청구항 4 또는 청구항 6에 있어서,상기 아로마 밸브는 상기 연결관에 대하여 수직으로 구비되는 이차전지.
- 청구항 13에 있어서,상기 아로마 밸브의 배기홀은 상기 연결관의 길이방향으로 형성되는 상기 연결관의 내부 배출통로에 대하여 수직으로 연장되는 이차전지.
- 청구항 13에 있어서,상기 아로마 밸브의 배기홀 상에 기체는 투과시키고 액체의 투과는 차단하는 멤브레인을 더 포함하는 이차전지.
- 청구항 1 내지 청구항 12 중 어느 한 항에 기재된 이차전지를 포함하는 전지팩.
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CN202180043028.1A CN115715439A (zh) | 2020-07-10 | 2021-07-06 | 二次电池 |
JP2022579098A JP7541128B2 (ja) | 2020-07-10 | 2021-07-06 | 二次電池 |
EP21838206.7A EP4156397A1 (en) | 2020-07-10 | 2021-07-06 | Secondary battery |
US18/012,000 US20230268606A1 (en) | 2020-07-10 | 2021-07-06 | Secondary Battery |
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KR1020200085661A KR20220007437A (ko) | 2020-07-10 | 2020-07-10 | 이차전지 |
KR10-2020-0085661 | 2020-07-10 |
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US (1) | US20230268606A1 (ko) |
EP (1) | EP4156397A1 (ko) |
JP (1) | JP7541128B2 (ko) |
KR (1) | KR20220007437A (ko) |
CN (1) | CN115715439A (ko) |
WO (1) | WO2022010237A1 (ko) |
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- 2021-07-06 JP JP2022579098A patent/JP7541128B2/ja active Active
- 2021-07-06 EP EP21838206.7A patent/EP4156397A1/en active Pending
- 2021-07-06 US US18/012,000 patent/US20230268606A1/en active Pending
- 2021-07-06 WO PCT/KR2021/008602 patent/WO2022010237A1/ko active Application Filing
- 2021-07-06 CN CN202180043028.1A patent/CN115715439A/zh active Pending
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Also Published As
Publication number | Publication date |
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EP4156397A1 (en) | 2023-03-29 |
JP7541128B2 (ja) | 2024-08-27 |
US20230268606A1 (en) | 2023-08-24 |
JP2023531939A (ja) | 2023-07-26 |
CN115715439A (zh) | 2023-02-24 |
KR20220007437A (ko) | 2022-01-18 |
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