WO2024085625A1 - 배터리셀, 이의 제조방법 및 이를 포함하는 직접 수냉용 배터리모듈 - Google Patents
배터리셀, 이의 제조방법 및 이를 포함하는 직접 수냉용 배터리모듈 Download PDFInfo
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- WO2024085625A1 WO2024085625A1 PCT/KR2023/016094 KR2023016094W WO2024085625A1 WO 2024085625 A1 WO2024085625 A1 WO 2024085625A1 KR 2023016094 W KR2023016094 W KR 2023016094W WO 2024085625 A1 WO2024085625 A1 WO 2024085625A1
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- WIPO (PCT)
- Prior art keywords
- battery cell
- plating layer
- area
- case
- porous coating
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 7
- 238000001816 cooling Methods 0.000 title description 23
- 239000007788 liquid Substances 0.000 title description 4
- 238000007747 plating Methods 0.000 claims abstract description 80
- 239000010410 layer Substances 0.000 claims abstract description 77
- 239000011247 coating layer Substances 0.000 claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 61
- 239000002826 coolant Substances 0.000 claims description 38
- 238000005507 spraying Methods 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229920006254 polymer film Polymers 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000007921 spray Substances 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
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- 238000010438 heat treatment Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
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Images
Classifications
-
- 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
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
- H01M50/124—Primary casings; Jackets or wrappings 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/256—Carrying devices, e.g. belts
-
- 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
- H01M50/673—Containers for storing liquids; Delivery conduits therefor
- H01M50/682—Containers for storing liquids; Delivery conduits therefor accommodated in battery or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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 a battery cell capable of improving the corrosion resistance of a battery cell by using a sacrificial metal whose metal ionization tendency is greater than that of the battery cell case, a method of manufacturing the same, and a battery module for direct water cooling including the same.
- Batteries used in eco-friendly vehicles require high output and therefore generate a large amount of heat. In order to improve battery performance and lifespan, it is very important to prevent the battery from overheating by efficiently discharging heat generated from the battery.
- a direct air cooling method As a cooling system for discharging heat from a battery, a direct air cooling method, an indirect water cooling method, or a direct water cooling method are known.
- Direct water cooling is a method in which battery cells are directly impregnated with coolant, and the heat from the battery cells is discharged directly into the coolant.
- Figure 1 is a schematic configuration diagram of a conventional battery module 10.
- a direct water-cooled battery module 10 is composed of a self-frame 11 and a plurality of battery cells 12.
- a plurality of battery cells 12 are arranged to be spaced apart from each other in the self-frame 11.
- the self-frame 11 is provided so that coolant can flow therein.
- the battery cell 12 has an external case containing the internal electrodes made of nickel-plated iron. Accordingly, when the battery cell 12 is directly impregnated with coolant, it is vulnerable to corrosion due to the characteristics of the material of the external case. Additionally, there is a problem in that the external case is polarized and has poor electrical insulation.
- insulating oil or special coolant (eg, NOVEC from 3M) is used to prevent corrosion of the battery cell 12.
- insulating oil has the problem of being vulnerable to fire, and special coolants such as 3M's NOVEC are excellent as coolants for battery cells in that they are non-polar and corrosion-resistant, but they are expensive and have the problem of increasing the manufacturing cost of battery modules. .
- the battery cell 12 is protected by using a non-woven fabric, etc. to maintain the rust preventive liquid. A post-processing process to cover the external case is required.
- the purpose of the present invention is to provide a battery cell that can improve the corrosion resistance of a battery cell by using a sacrificial metal whose metal ionization tendency is greater than that of the battery cell case, a method of manufacturing the same, and a battery module for direct water cooling including the same. Do it as
- a battery cell related to an embodiment of the present invention includes an electrode assembly, a case for accommodating the electrode assembly, a plating layer formed on the outer surface of the case, a scratch area formed by removing a portion of the plating layer, and It is provided to surround the scratch area and includes a porous coating layer containing a sacrificial metal whose ionization tendency is greater than that of the plating layer.
- the scratch area may include a plurality of non-plated portions from which a portion of the plating layer has been removed and a plating portion where a plating layer remains between two adjacent non-plated portions.
- the porous coating layer may be provided to contact the outer surface of the case through the non-plated portion by inserting at least a portion of the porous coating layer into the scratch area.
- the thickness of the area surrounding the plating layer of the porous coating layer may be smaller than the thickness of the area surrounding the scratch area.
- porous coating layer may be formed as the sacrificial metal is sprayed onto the scratch area.
- the plating layer may be a nickel plating layer
- the sacrificial metal may be one or more selected from the group consisting of aluminum, magnesium, zinc, aluminum alloy, magnesium alloy, and zinc alloy.
- the scratch area may be prepared by scratching the plating layer using a laser.
- the battery cell includes a polymer film and may further include a waterproof sheet surrounding the porous coating layer.
- the battery module related to an embodiment of the present invention includes a plurality of battery cells, a plurality of battery cells arranged spaced apart, a self-frame provided to allow coolant to flow between the plurality of battery cells, and a device for supplying coolant to the inside of the self-frame.
- a coolant supply unit included in the battery module related to an embodiment of the present invention.
- the coolant supply unit is provided to supply coolant that is not insulated.
- the method of manufacturing a battery cell related to an embodiment of the present invention includes the step (a) of forming a scratch area in a plating layer provided on the outer surface of the case and spraying molten sacrificial metal into the scratch area with compressed air, and step (b) of forming a porous coating layer covering the scratch area.
- the scratch area may be formed to include a plurality of non-plated portions from which a portion of the plating layer has been removed and a plating portion with a plating layer remaining between two adjacent non-plated portions.
- porous coating layer may be formed so that at least a portion of the area contacts the outer surface of the case through the non-plated portion.
- the compressed air may be injected at a pressure ranging from 12000 psi to 16000 psi.
- the compressed air may be sprayed at a speed ranging from 2000 m/s to 2200 m/s.
- the scratch area may be formed by removing the plating layer by a laser.
- the method of manufacturing the battery cell may further include the step of heat shrinking the waterproof film on the case so that the porous coating layer is not exposed to the outside after step (b).
- the battery cell related to at least one embodiment of the present invention has the following effects.
- the sacrificial metal which has a greater ionization tendency than the case, ionizes and reacts with moisture before the case and is oxidized, thereby improving the corrosion resistance of the case.
- the porous coating layer may have a microporous structure, thereby increasing the contact area in contact with moisture and air.
- the movement of electrons between the case and the porous coating layer can be facilitated through the scratch area, thereby ensuring the stability of the electrical connection between the case and the porous coating layer.
- direct water cooling can be implemented using low-cost general coolant that is not insulated, rather than expensive special coolant that is insulated.
- Figure 1 is a schematic configuration diagram of a conventional battery module.
- Figure 2 schematically shows the configuration of a battery module for direct water cooling according to an embodiment of the present invention.
- 3 to 5 schematically show a cross-sectional view of a battery cell according to an embodiment of the present invention.
- 6 to 10 are diagrams for explaining a method of manufacturing a battery cell according to an embodiment of the present invention.
- Figure 11 is a schematic diagram showing a thermal spray coating device used in the battery cell manufacturing method.
- a battery cell hereinafter, also referred to as a 'battery cell for direct water cooling'
- a method of manufacturing the same and a battery module for direct water cooling (hereinafter, also referred to as a 'battery module') including the same are shown. Please refer to and explain in detail.
- Figure 2 schematically shows the configuration of a battery module 100 for direct water cooling according to an embodiment of the present invention
- Figures 3 to 5 are cross-sectional views of the battery cell 120 according to an embodiment of the present invention. is schematically shown.
- Figure 3 shows a case with a scratch area provided
- Figure 4 shows a case with a porous coating layer formed
- Figure 5 shows a case with a waterproof sheet covering the porous coating layer.
- the battery module 100 for direct water cooling includes a self-frame 110, at least one battery cell 120 for direct water cooling, and general coolant (W). do.
- the battery module 100 includes a plurality of battery cells 120, a cell frame 110 accommodating the plurality of battery cells 120, and a coolant supply unit 160. Includes.
- the battery module 100 is a self-frame in which a plurality of battery cells 100 and a plurality of battery cells 120 are arranged to be spaced apart, and coolant (W) is provided to flow between the plurality of battery cells 120. (110) and a coolant supply unit 160 for supplying coolant (W) into the self-frame 110.
- the battery module 100 may have a direct water cooling structure that directly cools the battery cell 120 through coolant (W).
- W coolant
- the self-frame 110 has a predetermined space inside, and is provided in a structure that allows coolant (W) to flow within the space.
- the coolant (W) may be supplied to the inner space of the cell frame 110 and then discharged to the outside of the self-frame 110.
- the battery module 100 may include a coolant discharge unit for discharging the coolant W to the outside of the cell frame 110.
- the cooling water supply unit 160 may include a cooling water reservoir and a pump. Additionally, the coolant supply unit 160 may be provided to supply coolant W that is not insulated.
- the general coolant (W) may be a coolant commonly used in vehicles.
- the battery cell 120 includes an electrode assembly 127, a case 121, a plating layer 122, and a scratch area (S) provided on the plating layer 122. ) and a porous coating layer 123 surrounding the scratch area (S).
- the battery cell 120 includes a polymer film and may include a waterproof sheet 125 provided to surround the porous coating layer 123.
- the battery cell 120 includes an electrode assembly 127, a case 121 accommodating the electrode assembly 127, a plating layer 122 formed on the outer surface of the case 121, and a partial area of the plating layer 122. It includes a scratch area S formed by removal and a porous coating layer 123 that is provided to surround the scratch area S and includes a sacrificial metal with a greater ionization tendency than the plating layer 122.
- the battery cell 100 for direct water cooling is immersed in coolant (W)
- moisture may be transferred to the porous coating layer 123.
- the sacrificial metal of the porous coating layer 123 can improve the corrosion resistance of the case 121 because the ionization reaction of the metal to moisture is greater than the ionization reaction of the metal to moisture of the case 121.
- the battery cell 120 for direct water cooling is impregnated with the coolant (W)
- the battery cell 120 for direct water cooling is immersed in the coolant W due to the difference in the ionization reaction of the metal between the case 121 and the porous coating layer 123.
- the moisture in (W) undergoes an ionization reaction with the sacrificial metal of the porous coating layer, and as a result, the metal ionization reaction of the case 121 is suppressed, thereby preventing corrosion of the case 121.
- the electrode assembly 127 is stored in the case 121 and includes an anode, a cathode, and a separator disposed between the anode and the cathode.
- the electrode and the separator may form an integrated electrode assembly 127.
- the electrode assembly 127 is a jelly-roll type electrode assembly in which a sheet-shaped anode and a cathode are wound with a separator interposed therebetween, and a plurality of anodes and cathodes are sequentially stacked with a separator interposed between them.
- It may be a stacked electrode assembly or a stacked/folded electrode assembly in which unit cells, in which a predetermined unit of anodes and cathodes are stacked with a separator interposed, are placed on a separator film and wound sequentially.
- the case 121 accommodates the electrode assembly 127 and serves to protect the battery cell 120 from external shock.
- the case 121 may be cylindrical, pouch-shaped, or prismatic.
- the case 121 may be cylindrical.
- the electrode assembly 127 may be a rolled jelly-roll type electrode assembly
- the case 121 may be a cylindrical case
- the battery cell 120 for direct water cooling may be a cylindrical battery cell.
- the case 121 may be made of a metal material, and the case 121 may be made of one or more materials selected from the group consisting of steel or stainless steel.
- the surface of the case 121 may be nickel (Ni) plated. That is, the plating layer 121 may include a nickel plating layer.
- the nickel plating layer has little discoloration, excellent rust prevention, and excellent corrosion resistance and wear resistance.
- the nickel plating layer may corrode when immersed in coolant, and as corrosion progresses, polarity develops and insulation properties deteriorate.
- the plating layer 121 may become a factor that hinders the movement of electrons between the porous coating layer 123 and the case 121.
- the scratch portion (S) may be formed by removing a partial area of the plating layer 121 along the thickness direction of the plating layer 121, and the scratch portion (S) may be formed by removing a portion of the plating layer 121 along the thickness direction of the plating layer 121.
- a partial area of (121) and the outer surface of the case facing the partial area may be formed.
- the scratch area S is a plurality of non-plated portions 122b from which a portion of the plating layer 122 has been removed and a plating portion in which a plating layer remains between two adjacent non-plated portions 122b ( 122a) may be included. Additionally, the non-plated portion 122b may mean an area where the outer surface of the case 121 is exposed to the outside because there is no plating layer in the corresponding area. Additionally, the scratch area S may be formed in a partial area of the plating layer 122.
- the scratch area S is an area where a portion of the plating layer 122 of the case 121 has been removed according to a predetermined pattern. Additionally, the scratch area S may be prepared by scratching the plating layer 122 using a laser. Alternatively, the scratch area S may be formed as the plating layer 122 is etched.
- the porous coating layer 123 surrounds the plating layer 122 and the scratch area (S), and at least a portion of the area is inserted into the scratch area (S).
- porous coating layer 123 may be provided so that at least a portion of the porous coating layer 123 is inserted into the scratch area S so as to contact the outer surface of the case 121 through the non-plated portion 121b.
- the thickness (t) of the porous coating layer 123 may be different from that of the area surrounding the plating layer 122 and the area surrounding the scratch area (S).
- the thickness of the area surrounding the plating layer 122 of the porous coating layer 123 may be smaller than the thickness of the area surrounding the scratch area S.
- the porous coating layer 123 is made of a sacrificial metal material with a greater ionization tendency than the case 121.
- the sacrificial metal may include one or more selected from the group consisting of aluminum, magnesium, zinc, aluminum alloy, magnesium alloy, and zinc alloy.
- the moisture in the general coolant (W) ionizes the sacrificial metal in the porous coating layer 123 before ionizing reaction with the case 121. and ionization reaction occurs.
- porous coating layer 123 may be formed as the sacrificial metal is sprayed onto the scratch area (S).
- the porous coating layer 123 may be coated on the outer surface of the case 121 using a thermal spray coating method.
- the porous coating layer 123 may have a porous structure as molten sacrificial metal is sprayed into the case 121 together with compressed air.
- the pore size of the porous coating layer 123 may be 1 ⁇ m to 10 ⁇ m.
- the porous coating layer 123 formed of sacrificial metal has a porous structure, which has the effect of increasing the contact area with moisture and air, and the sacrificial metal, which has a greater ionization tendency than the case, reacts with moisture first.
- the waterproof sheet 125 surrounds the outer surface of the case 121 so that the porous coating layer 123 is not exposed to the outside.
- the waterproof sheet 125 may include a polymer film. With the case surrounded by the polymer film, the waterproof sheet 125 can be heat-compressed to the case 121 by heat-shrinking the polymer film.
- the heat-shrinkable polymer film may include one or more selected from the group consisting of polyvinylchloride (PVC), polypropylene (PP), or polyethylene terephthalate (PET).
- PVC polyvinylchloride
- PP polypropylene
- PET polyethylene terephthalate
- the battery module 100 is provided inside the self-frame 110 and may include waterproof layers 130 and 140 provided to cover the upper and lower portions of the battery cell 120, respectively.
- the waterproof layers 130 and 140 prevent moisture from permeating into the case 121 and perform the function of fixing the battery cell 120 to the cell frame 110.
- An upper waterproof layer 130 may be provided at the upper end of the case 121, and a lower waterproof layer 140 may be provided at the lower end of the case 121. Additionally, the plurality of battery cells 120 may be integrally fixed to the inner surface of the cell frame 110 through the waterproof layers 130 and 140 on the upper and lower sides, respectively.
- the waterproof layers 130 and 140 may include a waterproof adhesive or potting resin, and the potting resin may be any one of silicone-based resin, urethane-based resin, or epoxy-based resin.
- FIG. 6 to 10 are drawings for explaining a method of manufacturing a battery cell according to an embodiment of the present invention
- Figure 11 is a schematic diagram showing a thermal spray coating device used in the method of manufacturing a battery cell.
- FIG. 7 is a cross-sectional view taken along line a-a in (b) of FIG. 6
- FIG. 9 is a cross-sectional view taken along line b-b in (d) of FIG. 6.
- the porous coating layer 123 may be coated on the outer surface of the case 121 using a thermal spray coating method.
- the method of manufacturing a battery cell related to an embodiment of the present invention includes the step (a) of forming a scratch area in a plating layer provided on the outer surface of the case and spraying molten sacrificial metal into the scratch area with compressed air, and step (b) of forming a porous coating layer covering the scratch area.
- the scratch area S may be formed to include a plurality of non-plated portions from which a portion of the plating layer 122 has been removed and a plating portion with a plating layer remaining between two adjacent non-plated portions.
- porous coating layer 123 may be formed so that at least a portion of the area contacts the outer surface of the case 121 through the non-plated portion.
- a plate P made of a metal material is prepared.
- the plate (P) may be formed of one or more selected from the group consisting of steel or stainless steel.
- the plate P is processed into a case 121, and a plating layer 122 is formed on one surface of the plate P (the outer surface of the case).
- the plating layer 122 is formed by plating a plating material (eg, nickel) onto one side of the plate P.
- a plating material eg, nickel
- each unit area (A1 to A4) constitutes a unit plate that is processed into the case 121, respectively. That is, each unit area has a size that can be manufactured with the case 121.
- each unit area virtually partitioned on the plate P is referred to as a first unit area A1 to a fourth unit area A4.
- each unit area is divided into unit plates (P) by being cut along the cutting line (Lc), and referring to (e) of Figure 6, each unit area is cut along the cutting line (Lc).
- the unit plate P1 may be processed into a cylindrical shape and manufactured into a case 121, respectively.
- scratch areas S1 to S4 are provided in each unit area A1 to A4.
- the scratch areas (S1 to S4) are areas where the plating layer 122 of the case 121 is chemically etched according to a predetermined scratch pattern (Ls, see FIG. 8) or the plating layer 122 is scratched by a laser. am.
- the scratch area S the outer surface (non-plated portion) of the case 121 is exposed to the outside.
- a scratch area S is provided in each unit area A1 to A4.
- the scratch areas S of each unit area A1 to A4 are referred to as first scratch areas S1 to fourth scratch areas S4.
- the first scratch area S1 is an area in the first unit area A1 where the plating layer 122 is damaged
- the second scratch area S2 is an area in the second unit area A2 where the plating layer 122 is damaged. This is a damaged area.
- the third scratch area S3 is an area in the third unit area A3 where the plating layer 122 is damaged
- the fourth scratch area S4 is an area in the fourth unit area A4 where the plating layer 122 is damaged. This is a damaged area.
- first to fourth scratch areas S1 to S4 are provided on the same plane of the plate P and may be spaced apart from each other.
- each scratch area (S1 to S4) may have a smaller area than each unit area (A1 to A4).
- the unit plate P1 may have a scratch pattern Ls, and the scratch pattern includes a regular grid pattern (see FIG. 8(a)), a diagonal grid pattern (see FIG. 8(b)), It may be one of a wave pattern (see FIG. 8(c)), a horizontal straight pattern (see FIG. 8(d)), or a vertical straight pattern (see FIG. 8(e)).
- the scratch area S may include a plurality of unplated portions from which a portion of the plating layer 122 has been removed and a plating portion with a plating layer remaining between two adjacent non-plated portions.
- the scratch area (S) within each unit plate (P1) may be provided to be surrounded by the border area (E) of the unit plate (P1), or may be provided on the entire area of one side of the unit plate (P1). .
- the border area E is an area in which the non-plated portion of the plating layer 122 is not exposed to the outside and only the plated portion is exposed to the outside.
- the thermal spray coating device 200 sprays molten sacrificial metal (M) together with compressed air (Ac) onto one side of the plate (P) on which the scratch area (S) is provided.
- the sacrificial metal (M) forms a porous coating layer 123 surrounding the scratch area (S1).
- the thermal spray coating device 200 includes a metal spray unit 210, an air spray unit 220, a guide unit 240, and a heating unit 250.
- the guide unit 240 supplies the sacrificial metal wire 231 to the metal spray unit 210, and is installed in an entry path through which the sacrificial metal wire 231 enters the metal spray unit 210.
- the guide unit 240 may include a pair of guide rolls 241 and 242. A pair of guide rolls 241 and 242 rotate in opposite directions, allowing the sacrificial metal wire 231 to enter the passage 211 of the metal spraying unit 210 and guiding the movement of the sacrificial metal wire 231. .
- the metal spraying unit 210 is electrically connected to the heating unit 250.
- the heating unit 250 applies voltage to the metal spraying unit 210.
- the metal spray unit 210 is provided with a passage 211 through which the sacrificial metal wire 231 passes.
- the sacrificial metal wire 231 is melted as it passes through the heated metal spray unit 210.
- the heating temperature of the metal spray unit 210 may vary.
- the melting temperature of aluminum (Al) is approximately 660°C
- the melting temperature of magnesium (Mg) is approximately 650°C.
- the air injection unit 220 sprays compressed air (Ac).
- the air spray unit 220 may be installed inside the metal spray unit 210.
- the air spray unit 220 may be disposed within the metal spray unit 210 such that the central axis of the outlet of the air spray unit 220 is coaxial with the central axis of the outlet of the metal spray unit 210.
- compressed air (Ac) is sprayed from the thermal spray coating device 200 together with the molten sacrificial metal (M).
- the compressed air (Ac) may be injected at a pressure ranging from 12,000 psi to 16,000 psi, and the compressed air (Ac) may be injected at a speed in the range of 2,000 m/s to 2,200 m/s.
- the molten sacrificial metal (M) flows along the passage 211 of the metal spray unit 210 and is discharged to the outside of the metal spray unit 210, and the plate ( It is sprayed as P).
- the molten sacrificial metal (M), along with compressed air (Ac), is sprayed into the scratch area (S) and plated on the plate (P) so that the non-plated portion of the scratch area (S) is not exposed to the outside.
- the thermal spray coating device 200 can spray molten sacrificial metal (M) into the first scratch area (S1), and this process is performed in the second unit area (A2) to the fourth unit area (A2). A4) can be performed every time.
- the porous coating layer 123 is formed by spraying molten sacrificial metal (M) together with high-pressure compressed air (Ac) onto the outer surface of the case 121. Accordingly, the bonding strength between the porous coating layer 123 and the case 121 may be increased. That is, as molten sacrificial metal (M) particles are sprayed onto the outer surface of the case 121 along with high-pressure compressed air (Ac), the porous coating layer 123 may be formed.
- a plurality of porous coating layers 123 covering the first scratch area S1 to the fourth scratch area S4 are formed on one plate P, respectively. It can be provided.
- One plate P is cut for each unit area A1 to A4 along the cutting line Lc, thereby forming a plurality of unit plates P1.
- the unit plate P1 provided with the porous coating layer 123 is processed into a cylindrical shape and manufactured into a cylindrical case 121.
- the porous coating layer 123 can have a microporous structure, and the contact area of the regenerated metal in contact with moisture and air can be increased.
- the sacrificial metal which has a greater ionization tendency than the case, ionizes and reacts with moisture before the case and is oxidized, thereby oxidizing the inside of the case. Corrosivity can be improved.
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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)
- Inorganic Chemistry (AREA)
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (15)
- 전극 조립체;상기 전극 조립체를 수용하는 케이스;상기 케이스의 외면에 형성된 도금층;상기 도금층의 일부영역이 제거되어 형성된 스크래치 영역; 및상기 스크래치 영역을 둘러싸도록 마련되며, 상기 도금층보다 금속의 이온화 경향이 큰 희생 금속을 포함하는 다공성 코팅층을 포함하는 배터리셀.
- 제 1 항에 있어서,상기 스크래치 영역은 상기 도금층의 일부 영역이 제거된 복수 개의 비도금부 및 인접하는 2개의 비도금부 사이에 도금층이 잔존하는 도금부를 포함하는 배터리셀.
- 제 2 항에 있어서,다공성 코팅층은 적어도 일부 영역이 상기 비도금부를 통해 케이스의 외면에 접촉하도록 마련된 배터리셀.
- 제 2 항에 있어서,다공성 코팅층은 상기 도금층을 둘러싼 영역의 두께가 상기 스크래치 영역을 둘러싼 영역의 두께보다 작은 배터리셀.
- 제 1 항에 있어서,상기 다공성 코팅층은 상기 희생 금속이 상기 스크래치 영역 상에 분사됨에 따라 형성된 배터리셀.
- 제 1 항에 있어서,상기 도금층은 니켈 도금층이고,상기 희생금속은 알루미늄, 마그네슘, 아연, 알루미늄 합금, 마그네슘 합금, 및 아연 합금으로 이루어진 그룹으로부터 선택된 하나 이상인 배터리셀.
- 제 1 항에 있어서,상기 스크래치 영역은 레이저에 의해 상기 도금층이 스크래치 처리됨에 따라 마련된 배터리셀.
- 제 1 항에 있어서,고분자 필름을 포함하며, 상기 다공성 코팅층을 둘러싸는 방수 시트를 추가로 포함하는 배터리셀.
- 제 1 항에 따른 복수 개의 배터리셀;복수 개의 배터리셀이 이격되어 배치되며, 복수 개의 배터리셀 사이로 냉각수가 유동 가능하게 마련된 셀프레임; 및셀프레임 내부로 냉각수를 공급하기 위한 냉각수 공급부를 포함하며,상기 냉각수 공급부는 절연 처리되지 않은 냉각수를 공급하도록 마련된 배터리 모듈.
- 제 1 항에 따른 배터리셀의 제조방법으로서,케이스의 외면에 마련된 도금층에 스크래치 영역을 형성하는 단계 (a); 및용융된 희생금속을 압축 공기와 함께 상기 스크래치 영역으로 분사함으로써, 상기 스크래치 영역을 덮는 다공성 코팅층을 형성하는 단계 (b)를 포함하는 배터리셀의 제조 방법.
- 제 10 항에 있어서,상기 스크래치 영역은 상기 도금층의 일부 영역이 제거된 복수 개의 비도금부 및 인접하는 2개의 비도금부 사이에 도금층이 잔존하는 도금부를 포함하도록 형성되고,상기 다공성 코팅층은 적어도 일부 영역이 상기 비도금부를 통해 케이스의 외면에 접촉하도록 형성되는 배터리셀의 제조 방법.
- 제 10 항에 있어서,상기 압축 공기는 12000psi 내지 16000psi 범위의 압력으로 분사되는 배터리셀의 제조 방법.
- 제 10 항에 있어서,상기 압축 공기는 2000m/s 내지 2200m/s 범위의 속도로 분사되는 배터리셀의 제조 방법.
- 제 10 항에 있어서,상기 단계 (a)에서, 상기 스크래치 영역은 상기 도금층이 레이저에 의해 제거됨으로써 형성되는 배터리셀의 제조 방법.
- 제 10 항에 있어서,상기 다공성 코팅층이 외부로 노출되지 않도록 방수필름을 케이스에 열 수축시키는 단계를 추가로 포함하는 배터리셀의 제조 방법.
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EP23880202.9A EP4435940A1 (en) | 2022-10-18 | 2023-10-18 | Battery cell, method for manufacturing same, and direct liquid cooling battery module comprising same |
CN202380016884.7A CN118541854A (zh) | 2022-10-18 | 2023-10-18 | 电池电芯、其制造方法和包括其的直接水冷却型电池模块 |
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KR20220134064 | 2022-10-18 | ||
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KR (1) | KR20240054197A (ko) |
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JP2011175942A (ja) * | 2010-02-25 | 2011-09-08 | Sanyo Electric Co Ltd | 電池セル及びこれを用いた電源装置並びに電池セルの製造方法 |
JP2014103026A (ja) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | 蓄電素子 |
KR20150006103A (ko) * | 2013-07-05 | 2015-01-16 | 현대모비스 주식회사 | 직접 수냉 방식을 활용한 이차전지 모듈 및 이의 냉각방법 |
CN104756285A (zh) * | 2012-11-16 | 2015-07-01 | 日立汽车系统株式会社 | 单体电池以及电池组 |
KR20180112715A (ko) * | 2017-04-03 | 2018-10-12 | 주식회사 엘지화학 | 합금으로 표면 도금되어 있는 전지케이스를 포함하는 전지셀 |
KR20220134064A (ko) | 2021-03-26 | 2022-10-05 | 인제대학교 산학협력단 | 3d 올가미 형태의 혈전 제거용 기구 |
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KR101732232B1 (ko) | 2014-10-28 | 2017-05-02 | 주식회사 엘지화학 | 2차 전지 및 그 2차 전지의 제작 방법 |
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2023
- 2023-10-18 WO PCT/KR2023/016094 patent/WO2024085625A1/ko active Application Filing
- 2023-10-18 KR KR1020230139150A patent/KR20240054197A/ko unknown
- 2023-10-18 EP EP23880202.9A patent/EP4435940A1/en active Pending
- 2023-10-18 CN CN202380016884.7A patent/CN118541854A/zh active Pending
Patent Citations (6)
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JP2011175942A (ja) * | 2010-02-25 | 2011-09-08 | Sanyo Electric Co Ltd | 電池セル及びこれを用いた電源装置並びに電池セルの製造方法 |
CN104756285A (zh) * | 2012-11-16 | 2015-07-01 | 日立汽车系统株式会社 | 单体电池以及电池组 |
JP2014103026A (ja) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | 蓄電素子 |
KR20150006103A (ko) * | 2013-07-05 | 2015-01-16 | 현대모비스 주식회사 | 직접 수냉 방식을 활용한 이차전지 모듈 및 이의 냉각방법 |
KR20180112715A (ko) * | 2017-04-03 | 2018-10-12 | 주식회사 엘지화학 | 합금으로 표면 도금되어 있는 전지케이스를 포함하는 전지셀 |
KR20220134064A (ko) | 2021-03-26 | 2022-10-05 | 인제대학교 산학협력단 | 3d 올가미 형태의 혈전 제거용 기구 |
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CN118541854A (zh) | 2024-08-23 |
EP4435940A1 (en) | 2024-09-25 |
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