WO2023075342A1 - 나선형 용접부가 형성된 원통형 전지셀 및 이를 포함하는 전지모듈 - Google Patents
나선형 용접부가 형성된 원통형 전지셀 및 이를 포함하는 전지모듈 Download PDFInfo
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- WO2023075342A1 WO2023075342A1 PCT/KR2022/016306 KR2022016306W WO2023075342A1 WO 2023075342 A1 WO2023075342 A1 WO 2023075342A1 KR 2022016306 W KR2022016306 W KR 2022016306W WO 2023075342 A1 WO2023075342 A1 WO 2023075342A1
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- WIPO (PCT)
- Prior art keywords
- cylindrical battery
- battery cell
- welding
- spiral
- welded portion
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- 238000003466 welding Methods 0.000 title claims abstract description 94
- 238000002788 crimping Methods 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000035515 penetration Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
- B23K26/0624—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses using ultrashort pulses, i.e. pulses of 1ns or less
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/359—Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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 cylindrical battery cell having a spiral welded portion and a battery module including the same. Specifically, the present invention relates to a cylindrical battery cell having a spiral welded portion and a battery module including the same to prevent over-welding when the cylindrical battery cell is welded using a nanosecond pulse laser.
- the lithium secondary battery is not only widely used as an energy source for a wireless mobile device, which is a small multifunctional product, or a wearable device worn on the body, but also causes air pollution. It is also used as a medium-large battery pack for use as an energy source or power storage system (ESS) for electric vehicles and hybrid electric vehicles, which are proposed as alternatives to gasoline vehicles and diesel vehicles.
- ESS energy source or power storage system
- the lithium secondary battery is a cylindrical secondary battery and a prismatic secondary battery in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and a pouch type case in which the electrode assembly is embedded in an aluminum laminate sheet pouch type. classified as a secondary battery.
- the cylindrical secondary battery has the advantage of having a relatively large capacity and structural safety.
- a process of electrically connecting a plurality of cylindrical battery cells is required, for example, by combining a bus bar or a metal plate or wire bonding to the positive and negative terminals of the cylindrical battery cells.
- a bus bar or a metal plate or wire bonding to the positive and negative terminals of the cylindrical battery cells.
- the cylindrical battery cells can be electrically connected.
- a laser welding method may be used to electrically connect the positive and negative terminals of the plurality of cylindrical battery cells.
- continuous wave (CW) laser welding millisecond pulse laser welding, microsecond pulse laser welding, and nanosecond pulse laser welding may be used.
- a crimping part functions as a negative terminal and a top cap functions as a positive terminal, and welding is performed in a straight line pattern or circular pattern to the crimping part for electrical connection through the negative terminal.
- CW Continuous Wave
- millisecond pulse laser welding millisecond pulse laser welding
- microsecond pulse laser welding microsecond pulse laser welding
- the present invention is to solve the above problems, to provide a cylindrical battery cell in which a discontinuous spiral weld is formed and a battery module including the same to prevent over-welding at the welding portion of the electrode terminal of the cylindrical battery cell aims to
- a cap assembly is mounted on top of a battery case accommodating an electrode assembly, and the upper end of the battery case surrounds the outer periphery of the cap assembly and moves toward the center.
- a bent crimping part is formed, the crimping part is a negative terminal, the center top cap of the cam assembly is a positive terminal, and a discontinuous spiral welded part may be formed on at least one of the negative terminal and the positive terminal.
- weld lines are formed so as not to overlap.
- the spiral welded portion may be formed such that the heat-affected zone does not overlap.
- the weld may be formed using a nanosecond pulse laser.
- the spiral welded portion formed on the cathode terminal may form the welded portion while the nanosecond pulse laser linearly moves and spirally rotates at the same time.
- the spiral welded portion formed on the anode terminal may be formed by spirally rotating while the nanosecond pulse laser moves circularly.
- the post-welding line may be discontinuously formed so that the pre-welding line and the post-welding line do not overlap while rotating in a spiral manner.
- an interval between unit spirals may be equal to or greater than the horizontal width of the unit spiral at the negative terminal, and may be smaller than the horizontal width of the unit spiral at the positive terminal.
- a bus bar, wire, or metal plate may be coupled to the spiral welded portion.
- the present invention includes a battery module including the cylindrical battery cell, and a plurality of cylindrical battery cells may be connected in series and in parallel by combining bus bars, wires, or metal plates.
- the present invention can also be provided in the form of various combinations of means for solving the above problems.
- heat overlap can be minimized by a discontinuously formed spiral welded portion, and thus over-welding can be prevented from occurring at the welded portion.
- the spiral welded portion is formed such that the heat-affected zone does not overlap, it is possible to prevent a softening region of the material from being formed, and thus, a decrease in tensile force can be prevented.
- FIG. 1 is a perspective view of a cylindrical battery cell according to the present invention.
- FIG. 2 is a photograph of a cathode welded portion according to the present invention.
- FIG. 3 is a photograph of an anode welding portion according to the present invention.
- FIG. 4 is a photograph of a heat-affected zone of a cathode welded portion according to the present invention.
- FIG. 5 shows a photograph of a heat-affected zone of a spot-welded weld.
- Example 6 is a cross-sectional photograph of a welded portion of a cylindrical battery cell prepared in Example 1 and Comparative Example 2.
- Example 7 is a photograph observed while injecting air from the bottom of the cylindrical battery cells manufactured in Example 1.
- FIG. 9 is a schematic diagram and a photograph of an air leak test apparatus.
- FIG. 1 is a perspective view of a cylindrical battery cell according to the present invention.
- a cylindrical battery cell 100 accommodates an electrode assembly inside a battery case 110 and has a cap assembly mounted on top of the battery case 110 .
- the upper end of the battery case 110 surrounds the outer periphery of the cap assembly and forms a crimping portion 120 bent toward the center.
- the crimping part 120 becomes the negative terminal, and the central top cap 130 of the cap assembly becomes the positive terminal.
- the negative terminal and the positive terminal have a discontinuous spiral negative welding part 141 and a continuous spiral positive electrode.
- a weld 142 is formed.
- the cathode welding portion and the anode welding portion are formed using a nanosecond pulse laser having a relatively low heat input.
- FIG. 2 is a photograph of a cathode welded portion according to the present invention.
- FIG. 2 is a photograph of a negative electrode welded portion formed in a crimping portion serving as a negative electrode terminal, in which a discontinuous spiral welded portion is formed. Specifically, since the crimping part is formed in a narrow shape along the circular end of the upper part of the battery case, the nanosecond pulse laser moves in a straight line and rotates in a spiral at the same time to form the welding line 210 .
- the post-welding line 212 is discontinuously formed so that the pre-welding line 211 and the post-welding line 212 do not overlap while rotating in a spiral manner.
- the welding part is formed narrowly, and the present invention forms a spiral-shaped welding part in order to secure a wide welding part.
- the distance between the unit helixes may be formed so that the heat-affected zone does not overlap as much as possible in consideration of the horizontal width of the unit helix.
- the distance B between the unit helices may be equal to or greater than the horizontal width D of the unit helix in a negative electrode terminal in which a welding part is formed in a substantially straight shape.
- FIG. 3 is a photograph of an anode welding portion according to the present invention.
- the anode welded portion is formed with a continuous spiral welded portion.
- the nanosecond pulse laser moves in a circular shape and rotates in a spiral shape at the same time to form the welding line 210 .
- the base material to be the anode weld can be made of an aluminum-based alloy material and is generally thicker than 3.0T, so there is a low risk of penetration during nanosecond pulse laser welding. There are no parts to worry about. Therefore, the welding line of the anode welding portion may be formed in a continuous form without discontinuous sections in order to improve welding strength.
- the distance B between the unit spirals in the positive electrode terminal may be smaller than the horizontal width D of the unit spirals because the welding line is inevitably arranged more densely than the negative electrode welding part.
- the thickness of the base material of the positive electrode welded portion is generally greater than 3.0T compared to the negative electrode welded portion, the heat affected zone may not overlap even if the welding lines are densely arranged.
- the cylindrical battery cell of the present invention may be connected in series and / or in parallel with other cylindrical battery cells or electrically connected to the device by coupling a bus bar, wire, or metal plate to the positive terminal and the negative terminal.
- connection structure Through such a connection structure, it can be used as an energy source for devices requiring high capacity and high output.
- nanosecond pulse laser welding was performed, and a discontinuous spiral weld was formed as shown in FIG. 2 .
- the post-welding line was discontinuously formed so that the pre-welding line and the post-welding line do not overlap.
- FIG. 4 is a photograph of a heat-affected zone of a cathode welded portion according to the present invention.
- the heat-affected zone is not directly melted by a welding heat source, but refers to a part in which the physical properties of the base material are changed as the temperature rises due to the welding heat.
- welding strength may be weakened and tensile force may be lowered.
- a heat-affected zone 230 is formed around the welding line 210 .
- the heat-affected zone may partially overlap in a portion where the pre-welding line and the post-welding line are formed adjacent to each other, the overlapping area of the heat-affected zone can be minimized by configuring as shown in FIG. 4 .
- Spot welding was performed on the crimping portion and top cap of the cylindrical battery cell using a micro pulse laser.
- a plurality of dots were formed side by side to form a welded part, and at the positive terminal formed on the top cap, a welded part in which 15 dots were arranged in 3 rows and 5 columns was formed.
- the spot constituting one spot welding may be configured in a spiral shape formed by rotating about the center, and the tack time required to form a weld with 15 points of this shape is 0.3 seconds for the cathode and 1.5 seconds for the anode. .
- FIG. 5 shows a photograph of a heat-affected zone of a spot-welded weld.
- the heat-affected zone 230 is formed along the periphery of the welding line 210, an overlapping section of the heat-affected zone occurs along the spiral welding line.
- the base material is softened and the welding strength is weakened, and as a result, the tensile force may be lowered.
- Nanosecond pulse laser welding was performed in the same manner as in Example 1, except that post-welding lines were continuously formed so that the pre-welding line and the post-welding line overlapped in Example 1.
- Example 1 110 cylindrical battery cells prepared as in Example 1 and Comparative Example 2 were prepared, respectively.
- Figure 6 shows a cross-sectional photograph of the welded portion of the cylindrical battery cell prepared in Example 1 and Comparative Example 2.
- Figure 6 (a) is a welded cross section of Example 1
- Figure 6 (b) is a welded cross section of Comparative Example 2
- 48 and 49 are identification numbers of laser welded parts.
- the laser penetration depth of the crimping part in the 14, 15, and 16 welds shown in FIG. 6 (a) is 0.042 mm, 0.104 mm, and 0.190 mm, respectively, and The penetration depths are 0.307 mm, 0.399 mm, and 0.311 mm, respectively.
- the laser penetration depth is measured to be deeper in the welded portion of Comparative Example 2 formed such that the weld line overlaps. Therefore, when the welding lines are formed to overlap, the possibility of damaging the gasket under the crimping part by welding heat increases.
- FIG. 9 shows a schematic diagram and a photograph of an air leak test apparatus.
- Air leakage of the cylindrical battery cells prepared in Example 1 and Comparative Example 2 was confirmed using the air leakage test apparatus shown in FIG. 9 .
- the cylindrical battery cell 100 was mounted on an air leakage test jig while being inserted into the holder.
- Water was filled in the holder with a gasket interposed therebetween so as not to create a space between the holder and the cylindrical battery cell 100 .
- a hole for air injection was formed at the bottom of the cylindrical can, and while air was injected through the hole, whether or not bubbles were generated in the water was checked through a camera.
- the air injection pressure used a method of gradually increasing the pressure in four steps while maintaining a pressure lower than the venting pressure of the cylindrical battery cell, 20 kgf/cm 2 to 23 kgf/cm 2 . Specifically, air was injected at 15 kgf/cm 2 for 1 minute, 16 kgf/cm 2 for 1 minute, 17 kgf/cm 2 for 1 minute, and 18 kgf/cm 2 for 2 minutes.
- FIG. 7 is a photograph observed while air is injected from the bottom of the cylindrical battery cells manufactured in Example 1
- FIG. 8 is a photograph showing states before and after air injection of the cylindrical battery cells manufactured in Comparative Example 2.
- Example 1 the cylindrical battery cells prepared in Example 1 were not observed to generate air bubbles, while all of the cylindrical battery cells prepared in Comparative Example 2 had 86 out of 110 cells. It can be confirmed that air bubbles are generated at the welding part in the dog.
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- Optics & Photonics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Laser Beam Processing (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
항목 | 음극 | 양극 | 비고 |
용접부 길이 (A) (㎜) | 9.5 | 9.42 | |
단위 나선들 간의 간격 (B) (㎜) | 0.49 | 0.19 | |
단위 나선의 세로 폭 (C) (㎜) | 1.2 | 1.4 | 용접 가능 영역 최대로 확보하는 경우 |
단위 나선의 가로 폭 (D) (㎜) | 0.3 | 0.3 | |
Tack time (s) | 0.3 | 0.65 | |
총 나선 개수 | 12개 | 28개 | 나선 진동수(Hz)*tack time |
단위 나선 당 레이저 펄스 (회) | 5,000 | 4,642 | (레이저 주파수*tack time)/총 나선 개수 |
Claims (10)
- 전극조립체를 수납한 전지케이스의 상단에 캡 어셈블리를 탑재하고,상기 전지케이스의 상부 끝단은, 상기 캡 어셈블리의 외주변을 감싸며 중심 방향으로 절곡된 클림핑부를 형성하며,상기 클림핑부는 음극 단자이고, 상기 캠 어셈블리의 중심부 탑 캡은 양극 단자이며,상기 음극 단자 및 양극 단자 중 적어도 어느 하나에는 불연속적인 나선형의 용접부가 형성되는 원통형 전지셀.
- 제1항에 있어서, 상기 나선형의 용접부에서 용접 라인은 중첩되지 않도록 형성되는 원통형 전지셀.
- 제1항에 있어서, 상기 나선형 용접부는 열영향부가 중첩되지 않도록 형성되는 원통형 전지셀.
- 제1항에 있어서, 상기 용접부는 나노초 펄스 레이저를 이용하여 형성되는 원통형 전지셀.
- 제1항에 있어서, 상기 음극 단자에 형성되는 나선형의 용접부는,나노초 펄스 레이저가 직선형으로 이동하면서 동시에 나선형으로 회전하며 용접부를 형성하는 원통형 전지셀.
- 제1항에 있어서, 상기 양극 단자에 형성되는 나선형의 용접부는,나노초 펄스 레이저가 원형으로 이동하면서 동시에 나선형으로 회전하며 용접부를 형성하는 원통형 전지셀.
- 제5항 또는 제6항에 있어서,나선형으로 회전하면서 선용접 라인과 후용접 라인이 중첩되지 않도록 후용접 라인이 불연속적으로 형성되는 원통형 전지셀.
- 제1항에 있어서, 상기 나선형 용접부에서 단위 나선들 간의 간격은, 음극 단자에서는 단위 나선의 가로 폭과 동일하거나 더 크고, 양극 단자에서는 단위 나선의 가로 폭 보다 작은 원통형 전지셀.
- 제1항에 있어서, 상기 나선형의 용접부에는 버스바, 와이어 또는 금속 플레이트가 결합되어 있는 원통형 전지셀.
- 제1항 내지 제9항 중 어느 한 항에 따른 원통형 전지셀을 포함하는 전지모듈에 있어서,복수의 원통형 전지셀들은 버스바, 와이어 또는 금속 플레이트의 결합에 의해 직렬 연결 및 병렬 연결이 이루어지는 전지모듈.
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JP2023554368A JP2024512910A (ja) | 2021-10-25 | 2022-10-25 | 螺旋形溶接部が形成された円筒型電池セル及びこれを含む電池モジュール |
EP22887538.1A EP4300704A1 (en) | 2021-10-25 | 2022-10-25 | Cylindrical battery cell having spiral welding part, and battery module comprising same |
CN202280021549.1A CN116998060A (zh) | 2021-10-25 | 2022-10-25 | 具有螺旋焊接部分的圆柱形电池单元和包括其的电池模块 |
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Citations (6)
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JP2006100147A (ja) * | 2004-09-30 | 2006-04-13 | Sanyo Electric Co Ltd | パック電池 |
WO2015068353A1 (ja) * | 2013-11-05 | 2015-05-14 | 三洋電機株式会社 | 密閉型電池用封口体及び密閉型電池 |
KR20190008135A (ko) * | 2017-07-14 | 2019-01-23 | 주식회사 엘지화학 | 배터리 모듈 |
JP2020523768A (ja) * | 2017-06-19 | 2020-08-06 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh | バッテリパック装置、バッテリパック、及び、レーザ溶接プロセス |
KR20210025848A (ko) * | 2019-08-28 | 2021-03-10 | 주식회사 엘지화학 | 원통형 이차전지의 음극과 커넥터의 연결 방법 |
KR20210142324A (ko) | 2020-05-18 | 2021-11-25 | 조은공기 주식회사 | 농도변환 산소발생기 |
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- 2022-10-25 WO PCT/KR2022/016306 patent/WO2023075342A1/ko active Application Filing
- 2022-10-25 EP EP22887538.1A patent/EP4300704A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006100147A (ja) * | 2004-09-30 | 2006-04-13 | Sanyo Electric Co Ltd | パック電池 |
WO2015068353A1 (ja) * | 2013-11-05 | 2015-05-14 | 三洋電機株式会社 | 密閉型電池用封口体及び密閉型電池 |
JP2020523768A (ja) * | 2017-06-19 | 2020-08-06 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh | バッテリパック装置、バッテリパック、及び、レーザ溶接プロセス |
KR20190008135A (ko) * | 2017-07-14 | 2019-01-23 | 주식회사 엘지화학 | 배터리 모듈 |
KR20210025848A (ko) * | 2019-08-28 | 2021-03-10 | 주식회사 엘지화학 | 원통형 이차전지의 음극과 커넥터의 연결 방법 |
KR20210142324A (ko) | 2020-05-18 | 2021-11-25 | 조은공기 주식회사 | 농도변환 산소발생기 |
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EP4300704A1 (en) | 2024-01-03 |
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