WO2022139450A1 - 전해액 재주액 방법 및 전해액 재주액이 가능한 이차전지 - Google Patents
전해액 재주액 방법 및 전해액 재주액이 가능한 이차전지 Download PDFInfo
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- WO2022139450A1 WO2022139450A1 PCT/KR2021/019597 KR2021019597W WO2022139450A1 WO 2022139450 A1 WO2022139450 A1 WO 2022139450A1 KR 2021019597 W KR2021019597 W KR 2021019597W WO 2022139450 A1 WO2022139450 A1 WO 2022139450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrolyte
- polymer layer
- aluminum sheet
- functional hole
- injection
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 87
- 239000003792 electrolyte Substances 0.000 title claims abstract description 82
- 238000002347 injection Methods 0.000 title claims abstract description 55
- 239000007924 injection Substances 0.000 title claims abstract description 55
- 229920000642 polymer Polymers 0.000 claims abstract description 97
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 31
- -1 polypropylene Polymers 0.000 claims description 25
- 239000004743 Polypropylene Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 18
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 18
- 229920001155 polypropylene Polymers 0.000 claims description 14
- 239000004954 Polyphthalamide Substances 0.000 claims description 9
- 229920006375 polyphtalamide Polymers 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 229920001778 nylon Polymers 0.000 description 8
- 239000002861 polymer material Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
-
- 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
-
- 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
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/121—Organic 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/664—Temporary seals, e.g. for storage of instant batteries or seawater batteries
-
- 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
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
-
- 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
-
- 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 pouch, a secondary battery including the same, and a manufacturing method thereof.
- 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 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.
- stack-type unit cells can be roughly classified into a stack-and-fold type in which a long-length separation film is wound.
- a pouch-type battery having a structure in which a stack-type or stack/folding-type electrode assembly is embedded in a pouch-type battery case of an aluminum laminate sheet is attracting a lot of attention due to low manufacturing cost, small weight, easy shape deformation, etc. Also, its usage is gradually increasing.
- the secondary battery has a problem in that the electrolyte is consumed as charging and discharging proceed, and thus the performance is deteriorated.
- Patent Document Korean Patent Laid-Open No. 10-2014-0015647
- One aspect of the present invention is to provide an electrolyte re-injection method that facilitates re-injection of the electrolyte and a secondary battery capable of re-injecting the electrolyte.
- the electrolyte re-injection method is an electrolyte re-injection method of a secondary battery in which an electrode assembly and an electrolyte are accommodated in a pouch, wherein the pouch includes an aluminum sheet having functional holes and a polymer layer laminated on the aluminum sheet and a re-injection process of opening the functional hole and injecting additional electrolyte into the pouch through the functional hole; and a sealing process of sealing the functional hole after the re-injection process.
- a secondary battery capable of re-injecting an electrolyte includes an electrode assembly in which electrodes and separators are alternately stacked and assembled; and a pouch accommodating the electrode assembly, wherein the pouch includes an aluminum sheet and a polymer layer laminated with the aluminum sheet, a functional hole is formed in the aluminum sheet, and an inner peripheral surface of the functional hole is coated in the aluminum sheet It may be possible to re-inject an additionally equipped electrolyte.
- an electrolyte in a secondary battery, can be easily re-injected through the functional hole by using a pouch in which a polymer layer is laminated on an aluminum sheet in which a functional hole is formed.
- the gas located inside the pouch penetrates the polymer layer through the functional hole and can be easily discharged to the outside.
- FIG. 1 is a plan view showing a state before an electrode assembly is accommodated in a pouch in a secondary battery applied to an electrolyte re-injection method according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1 .
- FIG 3 is a plan view showing a secondary battery applied to the electrolyte re-injection method according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view taken along line B-B' in FIG. 3 .
- FIG. 5 is an enlarged cross-sectional view of region C in FIG. 4 .
- FIG. 6 is a cross-sectional view showing the concept of the re-injection process in the electrolyte re-injection method according to an embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing the concept of a sealing process in the electrolyte re-injection method according to an embodiment of the present invention.
- FIG. 1 is a plan view showing a state before an electrode assembly is accommodated in a pouch in a secondary battery applied to an electrolyte re-injection method according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along line A-A' in FIG. to be.
- FIG. 3 is a plan view showing a secondary battery applied to the electrolyte re-injection method according to an embodiment of the present invention
- FIG. 4 is a cross-sectional view taken along line B-B' in FIG. 3
- FIG. 5 is FIG. It is a cross-sectional view showing area C enlarged.
- FIG. 6 is a cross-sectional view illustrating the concept of a re-injection process in the electrolyte re-injection method according to an embodiment of the present invention
- FIG. 7 is a cross-sectional view illustrating the concept of a sealing process in the electrolyte re-injection method according to an embodiment of the present invention.
- FIGS. 6 and 7 are views exemplarily illustrating the concepts of the re-injection process and the sealing process by enlarging area C in FIG. 4 .
- the electrolyte re-injection method of the secondary battery according to the embodiment of the present invention is an electrolyte re-injection method of the secondary battery 100 in which the electrode assembly 120 and the electrolyte are accommodated in the pouch 110,
- the pouch 110 includes an aluminum sheet 113 in which a functional hole 113a is formed and polymer layers 111 and 116 laminated on the aluminum sheet 113, and additional electrolyte is supplied through the functional hole 113a inside the pouch 110. It includes a sealing process of sealing the functional hole 113a after going through a re-injection process and re-injection process.
- the electrode assembly 120 and the electrolyte in which electrodes and separators are alternately stacked and assembled into a pouch This is a method of re-injecting the electrolyte solution of the secondary battery 100 accommodated in 110).
- the pouch 110 includes an aluminum sheet 113 in which functional holes 113a are formed and polymer layers 111 and 116 laminated on the aluminum sheet 113 .
- the coating portion 113b may be formed on the inner circumferential surface of the functional hole 113a in the aluminum sheet 113 .
- the coating part 113b may include an insulating and chemical resistant material.
- a hole is formed in the polymer layer 111 and 116 corresponding to the functional hole 113a for the electrolyte re-injection process, and after sealing through a sealing process, the functional hole 113a portion to oxidize the aluminum sheet 113 while in contact with the electrolyte, or to prevent electricity from passing between the electrode assembly 120 and the aluminum sheet 113 through the functional hole 113a.
- the coating portion 113b may include, for example, silicon, but the material of the coating portion 113b of the present invention is not necessarily limited thereto.
- the re-injection process may open the functional hole 113a by forming a hole through the tool P in the polymer layers 111 and 116 covering the functional hole 113a.
- an additional electrolyte may be injected through the functional hole 113a by piercing portions of the polymer layers 111 and 116 covering the functional hole 113a, for example.
- an additional electrolyte may be injected through the functional hole 113a by penetrating a needle into the polymer layers 111 and 116 covering the functional hole 113a.
- the polymer layers 111 and 116 may include a first polymer layer 116 and a second polymer layer 111 . Accordingly, the pouch 110 may be stacked with the first polymer layer 116 , the aluminum sheet 113 , and the second polymer layer 111 from the inside in which the electrode assembly 120 is accommodated.
- the first polymer layer 116 and the second polymer layer 111 may be formed on both surfaces of the aluminum sheet 113 to cover the functional hole 113a formed in the aluminum sheet 113 .
- the first polymer layer 116 and the second polymer layer 111 may include a polymer material.
- the first polymer layer 116 and the second polymer layer 111 including a polymer material through which gases such as CO and CO2 are permeable cover the functional hole 113a so that the internal gas can be discharged. , it is possible to prevent the electrolyte from leaking through the functional hole 113a.
- the first polymer layer 116 and the second polymer layer 111 covering the functional hole 113a are opened to inject the electrolyte into the pouch 110 through the functional hole 113a.
- a nylon layer 112 may be further laminated between the aluminum sheet 113 and the second polymer layer 111 .
- the first polymer layer 116, the nylon layer 112, and the second polymer layer 111 covering the functional hole 113a are opened to pass the electrolyte solution through the functional hole 113a into the pouch ( 110) can be injected inside.
- the first polymer layer 116 may be made of a polypropylene (PP) material
- the second polymer layer 111 may be made of a PET (polyethylene terephthalate) material.
- the inner layer in which the electrode assembly 120 is accommodated is made of a polypropylene (PP) material, and the outer layer facing the aluminum sheet 113 is polyphthalamide (PPa).
- the second polymer layer 111 may be made of a PET (polyethylene terephthalate) material.
- the sealing process may seal the functional hole 113a after the re-injection process.
- the functional hole 113a may be sealed by sealing a portion corresponding to the opened functional hole 113a in the second polymer layer 111 .
- the functional hole 113a may be sealed by filling the hole portion corresponding to the opened functional hole 113a in the second polymer layer 111 with a sealing material R.
- the open portion of the second polymer layer 111 may be sealed using a resin material.
- the open portion of the second polymer layer 111 may be sealed using the same material as that of the second polymer layer 111 .
- the electrolyte re-injection solution Even when the electrolyte injection part is sealed through the post-sealing process, internal gas can be discharged, and the electrolyte can be prevented from leaking through the functional hole 113a.
- the secondary battery 100 capable of re-injecting an electrolyte includes an electrode assembly 120 in which electrodes and separators are alternately stacked and assembled, and an electrode assembly 120 . It includes a pouch 110 for accommodating it, the pouch 110 includes an aluminum sheet 113 and polymer layers 111 and 116 laminated with the aluminum sheet 113, and a functional hole 113a is formed in the aluminum sheet 113. is formed
- the secondary battery 100 capable of re-injecting the electrolyte according to the embodiment of the present invention relates to the secondary battery 100 to which the method of re-injecting the electrolyte according to the above-described embodiment is applied. Accordingly, the present embodiment will omit or briefly describe the content overlapping with the above-described embodiment, and will focus on the differences.
- the electrode assembly 120 is a power generating element capable of charging and discharging, and electrodes and separators are alternately stacked and assembled.
- the electrode may include an anode and a cathode, and an anode, a separator, and a cathode may be alternately positioned.
- the electrode assembly 120 may further include an electrode lead 130 connected to an end of the electrode.
- the electrode assembly 120 may be electrically connected to an external device through the electrode lead 130 .
- the pouch 110 may accommodate the electrode assembly 120 .
- a receiving part in which the electrode assembly 120 is accommodated may be formed therein.
- the pouch 110 may include an aluminum sheet 113 and polymer layers 111 and 116 laminated with the aluminum sheet 113 .
- the aluminum sheet 113 may be formed in the form of a sheet made of an aluminum material to form a layer.
- a functional hole 113a may be formed in the aluminum sheet 113 .
- the functional hole 113a may be formed in the aluminum sheet 113 with a size of 1 to 9 mm.
- the functional hole may be formed to penetrate through the aluminum sheet 113 with respect to the lamination direction of the aluminum sheet 113 and the polymer layers 111 and 116 .
- the functional hole 113a may be formed between the electrode assembly 120 and the outer peripheral surface of the pouch 110 in the pouch 110 .
- the functional hole 113a may be formed in the portion of the aluminum sheet 113 on the side where the electrode lead 130 is located.
- the polymer layers 111 and 116 may include a first polymer layer 116 and a second polymer layer 111 .
- the first polymer layer 116 and the second polymer layer 111 may be formed on both surfaces of the aluminum sheet 113 to cover the functional hole 113a formed in the aluminum sheet 113 .
- the first polymer layer 116 and the second polymer layer 111 may include a polymer material. Accordingly, the first polymer layer 116 and the second polymer layer 111 including a polymer material through which a gas such as CO and CO 2 can permeate cover the functional hole 113a so that internal gas can be discharged. In addition, it is possible to prevent the electrolyte from leaking through the functional hole 113a.
- the coating part 113b may be provided on the inner peripheral surface of the functional hole 113a in the aluminum sheet 113 .
- the coating portion 113b may be coated to cover the entire inner circumferential surface of the functional hole 113a in the aluminum sheet 113 .
- the coating part 113b may include an insulating and chemical resistant material. Accordingly, in order to re-inject the electrolyte, a hole is formed and sealed in the polymer layer 111 and 116 corresponding to the functional hole 113a, and then the electrolyte comes into contact with the functional hole 113a portion to oxidize the aluminum sheet 113 or , it is possible to prevent electricity from passing between the electrode assembly and the aluminum sheet 113 through the functional hole 113a.
- the coating portion 113b is formed along the inner circumferential surface of the functional hole 113a. It is possible to prevent direct contact between the electrolyte and the aluminum sheet 113 .
- the coating portion 113b is formed along the inner circumferential surface of the functional hole 113a to prevent the electrode assembly 120 from directly contacting the aluminum sheet 113 through the hole portion of the first polymer layer 116 .
- the coating portion 113b may include, for example, silicon, but the material of the coating portion 113b of the present invention is not necessarily limited thereto.
- a first polymer layer 116 , an aluminum sheet 113 , and a second polymer layer 111 may be stacked from the inside in which the electrode assembly 120 is accommodated to the outside.
- the pouch 110 may be bonded by laminating a first polymer layer 116 , an aluminum sheet 113 , and a second polymer layer 111 each having a thickness of 10 ⁇ m to 90 ⁇ m.
- a nylon layer 112 may be further laminated between the aluminum sheet 113 and the second polymer layer 111 .
- the nylon layer 112 is made of a nylon (nylon) material, and gas may pass therethrough.
- the nylon layer 112 is also Corresponding holes may be formed.
- the second polymer layer 111 may be made of a PET (polyethylene terephthalate) material.
- the first polymer layer 116 may be made of a PP (polypropylene, polypropylene) material.
- the inner layer 115 in which the electrode assembly 120 is accommodated in the first polymer layer 116 is made of a PP (polypropylene, polypropylene) material, and the outer layer 114 facing the aluminum sheet 113 is It may be made of a PPa (Polyphthalamide, Polyphthalamide) material.
- a sealing part S is formed on the outer circumferential surface of the pouch 110 to seal the inside of the pouch 110 .
- the sealing part S may be formed by thermally sealing the outer peripheral surface of the pouch 110 in three or four directions.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
Description
Claims (20)
- 전극 조립체 및 전해액이 파우치에 수용된 이차전지의 전해액 재주액 방법으로서,상기 파우치는 기능성 홀이 형성된 알루미늄 시트 및 상기 알루미늄 시트에 적층된 폴리머층을 포함하고,상기 기능성 홀을 개방시켜, 상기 기능성 홀을 통해 추가 전해액을 상기 파우치 내부로 주액하는 재주액과정; 및상기 재주액 과정을 거친 후 상기 기능성 홀을 밀봉시키는 밀봉과정을 포함하는 전해액 재주액 방법.
- 청구항 1에 있어서,상기 재주액 과정은상기 기능성 홀을 덮고 있는 상기 폴리머층 부분을 피어싱하여 상기 기능성 홀을 통해 추가 전해액을 주액하는 전해액 재주액 방법.
- 청구항 1에 있어서,상기 재주액 과정은상기 기능성 홀을 덮고 있는 상기 폴리머층 부분에 주사바늘을 관통시켜 상기 기능성 홀을 통해 추가 전해액을 주액하는 전해액 재주액 방법.
- 청구항 1에 있어서,상기 폴리머층은 제1 폴리머층 및 제2 폴리머층을 포함하고,상기 파우치는 상기 전극 조립체가 수용되는 내측으로부터 외측으로 상기 제1 폴리머층, 상기 알루미늄 시트, 및 상기 제2 폴리머층으로 적층되며,상기 재주액과정은 상기 기능성 홀을 덮고 있는 상기 제1 폴리머층 및 제2 폴리머층 부분을 개방시켜 상기 전해액을 상기 기능성 홀을 통해 상기 파우치 내부로 주액하는 전해액 재주액 방법.
- 청구항 4에 있어서,상기 밀봉 과정은상기 제2 폴리머층에서 개방된 상기 기능성 홀에 대응되는 부분을 실링하여 상기 기능성 홀을 밀봉시키는 전해액 재주액 방법.
- 청구항 5에 있어서,상기 밀봉 과정은상기 제2 폴리머층의 개방 부분을 레진(Resin) 재질을 사용하여 실링하는 전해액 재주액 방법.
- 청구항 5에 있어서,상기 밀봉 과정은상기 제2 폴리머층의 개방 부분을 상기 제2 폴리머층과 동일 재질을 사용하여 실링하는 전해액 재주액 방법.
- 청구항 4에 있어서,상기 제1 폴리머층은 PP(polypropylene, 폴리프로필렌) 재질로 이루어지고, 상기 제2 폴리머층은 PET(polyethylene terephthalate, 폴리에틸렌테레프탈레이트) 재질로 이루어지는 전해액 재주액 방법.
- 청구항 4에 있어서,상기 제1 폴리머층에서 전극 조립체가 수용되는 내층은 PP(polypropylene, 폴리프로필렌) 재질로 이루어지고, 알루미늄 시트와 마주보는 외층은 PPa(Polyphthalamide, 폴리프탈아미드) 재질로 이루어지며,상기 제2 폴리머층은 PET(polyethylene terephthalate, 폴리에틸렌테레프탈레이트) 재질로 이루어지는 전해액 재주액 방법.
- 청구항 1에 있어서,상기 알루미늄 시트에서 상기 기능성 홀의 내주면에 코팅부가 형성된 전해액 재주액 방법.
- 청구항 10에 있어서,상기 코팅부는 절연 및 내화학성 재질을 포함하는 전해액 재주액 방법.
- 전극 및 분리막이 교대로 적층되어 결집된 전극 조립체; 및상기 전극 조립체를 수용하는 파우치를 포함하고,상기 파우치는 알루미늄 시트 및 상기 알루미늄 시트와 라미네이션된 폴리머층을 포함하며,상기 알루미늄 시트에 기능성 홀이 형성되고,상기 알루미늄 시트에서 상기 기능성 홀의 내주면에 코팅부가 구비된 전해액 재주액이 가능한 이차전지.
- 청구항 12에 있어서,상기 코팅부는 상기 알루미늄 시트에서 상기 기능성 홀의 내주면 전체를 덮도록 코팅된 전해액 재주액이 가능한 이차전지.
- 청구항 12에 있어서,상기 코팅부는 절연 및 내화학성 재질을 포함하는 전해액 재주액이 가능한 이차전지.
- 청구항 12에 있어서,상기 코팅부는 실리콘을 포함하는 전해액 재주액이 가능한 이차전지.
- 청구항 12에 있어서,상기 기능성 홀은상기 알루미늄 시트 및 상기 폴리머층의 적층방향에 대하여 상기 알루미늄 시트를 관통하는 전해액 재주액이 가능한 이차전지.
- 청구항 12에 있어서,상기 폴리머층은 제1 폴리머층 및 제2 폴리머층을 포함하고,상기 파우치는 상기 전극 조립체가 수용되는 내측으로부터 외측으로 상기 제1 폴리머층, 상기 알루미늄 시트, 및 상기 제2 폴리머층이 적층된 전해액 재주액이 가능한 이차전지.
- 청구항 17에 있어서,상기 제1 폴리머층은 PP(polypropylene, 폴리프로필렌) 재질로 이루어지고, 상기 제2 폴리머층은 PET(polyethylene terephthalate, 폴리에틸렌테레프탈레이트) 재질로 이루어지는 전해액 재주액이 가능한 이차전지.
- 청구항 17에 있어서,상기 제1 폴리머층에서 전극 조립체가 수용되는 내층은 PP(polypropylene, 폴리프로필렌) 재질로 이루어지고, 알루미늄 시트와 마주보는 외층은 PPa(Polyphthalamide, 폴리프탈아미드) 재질로 이루어지며,상기 제2 폴리머층은 PET(polyethylene terephthalate, 폴리에틸렌테레프탈레이트) 재질로 이루어지는 전해액 재주액이 가능한 이차전지.
- 청구항 18에 있어서,상기 기능성 홀은상기 파우치에서 상기 전극 조립체와 상기 파우치의 외주면 사이에 형성된 전해액 재주액이 가능한 이차전지.
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EP21911517.7A EP4228084A1 (en) | 2020-12-23 | 2021-12-22 | Method for re-injecting electrolyte, and secondary battery enabling electrolyte re-injection |
JP2023530049A JP2023550109A (ja) | 2020-12-23 | 2021-12-22 | 電解液の再注液方法および電解液の再注液が可能な二次電池 |
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WO2024065786A1 (zh) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | 包装壳、电池单体、电池模组、电池及用电装置 |
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2020
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- 2021-12-22 JP JP2023530049A patent/JP2023550109A/ja active Pending
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CN116472644A (zh) | 2023-07-21 |
KR20220091295A (ko) | 2022-06-30 |
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