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WO2018199439A1 - Batterie rechargeable - Google Patents

Batterie rechargeable Download PDF

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Publication number
WO2018199439A1
WO2018199439A1 PCT/KR2018/001102 KR2018001102W WO2018199439A1 WO 2018199439 A1 WO2018199439 A1 WO 2018199439A1 KR 2018001102 W KR2018001102 W KR 2018001102W WO 2018199439 A1 WO2018199439 A1 WO 2018199439A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
tabs
welded
null
cap plate
Prior art date
Application number
PCT/KR2018/001102
Other languages
English (en)
Korean (ko)
Inventor
김유나
Original Assignee
삼성에스디아이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성에스디아이 주식회사 filed Critical 삼성에스디아이 주식회사
Publication of WO2018199439A1 publication Critical patent/WO2018199439A1/fr

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • 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
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • 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
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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 disclosure relates to a secondary battery, and more particularly, to a secondary battery that connects a plurality of plain tabs drawn from an electrode substrate of an electrode assembly to an electrode terminal using a connection tab.
  • a rechargeable battery is a battery that repeatedly performs charging and discharging, unlike a primary battery.
  • Small capacity secondary batteries can be used in portable electronic devices such as mobile phones, notebook computers and camcorders, and large capacity secondary batteries can be used as power sources for driving motors of hybrid vehicles and electric vehicles.
  • the secondary battery includes an electrode assembly for charging and discharging, a case accommodating the electrode assembly, a cap plate coupled to the opening of the case, and an electrode terminal electrically connected to the electrode assembly and drawn out of the cap plate. do.
  • the electrode assembly forms a plurality of plain tabs. Multiple uncoated taps lower the resistance for high power.
  • the plain tabs are connected to the connection tabs, and the connection tabs are connected to the electrode terminals.
  • the plain tabs are laser welded after ultrasonic welding to the connecting tab. At this time, as the number of the tabs of the plain tabs increases, the stack height of the tabs of the tab tabs increases. Therefore, during ultrasonic welding of the plain tabs and the connecting tab, the ultrasonic power output is high.
  • the plain tabs may be damaged.
  • welding uniformity and welding reliability may be degraded.
  • One aspect of the present invention is to provide a secondary battery that improves welding uniformity and welding reliability for flat tabs and connecting tabs.
  • a secondary battery includes a case accommodating an electrode assembly, a cap plate coupled to an opening of the case, an electrode terminal provided on the cap plate, and a plain part drawn out of the electrode assembly and first welded thereto. And a reinforcing plate second welded to the tabs, and a connecting tab connected to the electrode terminal at the other end by being third welded to the reinforcement plate.
  • the first welding may temporarily weld the plurality of plain tabs by ultrasonic welding
  • the second welding may be main welding of the reinforcing plate to the welded plain tabs by ultrasonic welding.
  • the third welding may connect the connecting tab to the welded plain tabs and the reinforcing plate by laser welding.
  • the second welded plain tabs and the reinforcing plate are first welded welded outwardly from the horn and anvil to a first knurl portion of the first planar area, and a first planar area inside the first welded area. And a second null weld that is ultrasonically welded to the second null portion of the smaller second planar area.
  • the first null weld may be ultrasonically welded to a first depth of the first null portion, and the second null weld may be ultrasonically welded to a second depth of the second null portion that is shallower than the first depth.
  • the reinforcement plate may be disposed on one or both sides of the tack-welded tabs.
  • the second null weld may be formed in the entire width direction of the plain tabs.
  • the second null weld may be formed at a center portion in the width direction of the plain tabs.
  • the secondary battery according to an embodiment of the present invention further includes an insulating member disposed between the electrode assembly and the cap plate and coupled to the cap plate, wherein the insulating member is formed by the tab of the plain tabs from the electrode assembly.
  • the electrode terminal includes a first terminal installed in an insulating structure on the cap plate, and a second terminal electrically connected to the cap plate, wherein the second terminal is connected to a first protrusion protruding to an outer surface of the cap plate.
  • the connection tab which is coupled and welded and electrically connected to the second terminal may be coupled and welded to a second protrusion protruding to an inner surface of the cap plate.
  • the first tabs (eg, ultrasonic welding) on the plain tabs are welded to the second plate (eg, ultrasonic welding) on the reinforcing plate, and then the connection tabs are removed from the reinforcing plates.
  • Welding eg, laser welding
  • weld uniformity and weld reliability for the flat tabs and connecting tabs can improve weld uniformity and weld reliability for the flat tabs and connecting tabs.
  • the tabs and the reinforcing plate are welded with the first and second null welds having different first and second planar areas, and the second null weld with a small second planar area.
  • the third welding (laser welding) of the connection tabs can further improve the welding uniformity and welding reliability for the plain tabs and the connection tabs.
  • FIG. 1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1.
  • FIG. 4 is a perspective view illustrating ultrasonically welded states of the tabs of the uncoated region of the electrode assembly of FIG. 3.
  • FIG. 5 is a perspective view of the ultrasonic main welding state by applying a reinforcing plate to the uncoated region tabs ultrasonically welded.
  • Fig. 6 is a sectional view of the horn and the anvil used for the ultrasonic main welding.
  • FIG. 7 is a perspective view of a state in which the ultrasonic main welded plain tabs and the reinforcing plate are laser welded to the connecting tab.
  • FIG. 8 is a front view showing a first embodiment of the state in which the plain tabs and the reinforcing plate are ultrasonically welded in a state and after the main welding, they are laser welded to the connecting tab.
  • Fig. 9 is a front view showing a second embodiment of the state in which the plain tabs and the reinforcing plate are ultrasonically welded to the connecting tab and laser welded to the connecting tab after the main welding.
  • a rechargeable battery according to an embodiment may include a case 20 accommodating an electrode assembly 10 for charging / discharging and a cap plate coupled to an opening 21 of the case 20. 30 and an electrode terminal (eg, the first terminal 41 and the second terminal 42) provided at the cap plate 30 and electrically connected to the electrode assembly 10.
  • a case 20 accommodating an electrode assembly 10 for charging / discharging
  • a cap plate coupled to an opening 21 of the case 20.
  • an electrode terminal eg, the first terminal 41 and the second terminal 42
  • the case 20 sets a space for accommodating the electrode assembly 10 and the electrolyte in the shape of a plate (see FIG. 4).
  • the case 20 is formed in a substantially rectangular parallelepiped space and has a rectangular opening 21 at one side thereof to insert the electrode assembly 10.
  • the cap plate 30 is coupled to the opening 21 of the case 20 to seal the opening of the case 20.
  • the case 20 and the cap plate 30 may be made of aluminum and welded to each other at the opening 21.
  • the first terminal 41 is installed in the cap plate 30 in an insulating structure, and the second terminal 42 is installed in a structure electrically connected to the cap plate 30 to form a cap assembly.
  • An insulating member 70 is disposed between the electrode assembly 10 and the cap plate 30.
  • the insulating member 70 is formed of an electrical insulating material and fixedly coupled to the upper cap plate 30 to electrically insulate the electrode assembly 10 and the cap plate 30.
  • the insulating member 70 enables electrical connection between the electrode assembly 10 and the first and second terminals 41 and 42.
  • the cap plate 30 further includes an electrolyte injection hole 31 and a vent hole 32.
  • the electrolyte injection hole 31 couples the cap plate 30 to the case 20 to weld the electrolyte, and then injects the electrolyte into the case 20. After the electrolyte injection, the electrolyte injection opening 31 is sealed with a sealing stopper 311.
  • the vent hole 32 is formed to discharge the internal pressure by the gas generated inside the secondary battery by the charging and discharging action of the electrode assembly 10, and is sealed by the vent plate 321.
  • the vent hole 32 and the vent plate 321 may be integrally formed with the cap plate 30 through a coining process.
  • the vent plate 321 When the internal pressure of the secondary battery reaches the set pressure, the vent plate 321 is cut to open the vent hole 32 to discharge the gas and the internal pressure generated by the overcharge. To this end, the vent plate 321 has a notch 322 for inducing incision.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1
  • FIG. 4 is a perspective view illustrating ultrasonic welding of the tabs of the uncoated region of the electrode assembly of FIG. 3.
  • the electrode assembly 10 is formed in a plate shape that forms a semicircle plane (xy plane) at both ends in the y-axis direction so as to be accommodated in the case 20 having a substantially rectangular parallelepiped shape.
  • the electrode assembly 10 includes a first electrode 11 (for example, a cathode) and a second electrode 12 (for example, an anode) provided on both sides of the separator 13, which is an electrical insulation material, and the cathode 11. ), The separator 13 and the positive electrode 12 are wound.
  • the electrode assembly may be formed in a stacked structure (not shown).
  • the anodes 11 and 12 are the electrode bases of the metal foils (for example, Cu and Al foils), that is, the coating portions 111 and 121 in which the active material is applied to the current collector, and the house exposed by not applying the active material. It includes a plurality of plain tabs (112, 122) formed as a whole. The plain tabs 112 and 122 are disposed at one end of the electrode assembly 10.
  • the plain tabs 112 of the negative electrode 11 are disposed at one side (the right side of FIG. 4) at one end (the top of FIG. 4) of the electrode assembly 10, and the plain tabs 122 of the positive electrode 12 are Spaced apart from the same end of the electrode assembly 10 (top of Figure 4) is disposed on each other on the other side (left of Figure 4).
  • the plurality of non-coating tabs 112 and 122 are provided in the electrode assembly 10 so as to allow a current to be charged and discharged, thereby reducing the overall current resistance of the non-coating tabs 112 and 122. Accordingly, the electrode assembly 10 may charge and discharge a high current through the tabs 112 and 122.
  • the tabs 112 and 122 drawn out from the electrode assembly 10 are stacked on each other to be first welded W1.
  • the first welding W1 welds the plurality of plain tabs 112 and 122 to each other by ultrasonic welding. Therefore, the negative tabs 112 and 122 of the positive and negative electrodes 11 and 12 are kept in close contact with each other without being separated into sheets, so that they can have low electrical conductivity.
  • the first welding W1 is ultrasonically welded to align the plain tabs 112 and 122 forming the stacked structure of the multi-tabs at positions corresponding to each other in the stacking direction. Therefore, during the second welding W2 (ultrasound main welding) that is performed after the tack welding, the tabs 112 and 122 are not separated into sheets. Accordingly, damage to the uncoated tabs 112 and 122 by the horn 71 and the anvil 72 can be prevented.
  • FIG. 5 is a perspective view of the ultrasonic main welding state by applying a reinforcing plate to the uncoated region tabs ultrasonically welded.
  • the welded plain tabs 112 and 122 are second welded with the reinforcing plates 113 and 123.
  • the second welding W2 main-welds the plain tabs 112 and 122 and the reinforcing plates 113 and 123 by ultrasonic welding.
  • Fig. 6 is a sectional view of the horn and the anvil used for the ultrasonic main welding. 5 and 6, the reinforcing plates 113 and 123 have a higher mechanical rigidity than the plain tabs 112 and 122, and in contact with the horn 71 and the anvil 72 during ultrasonic main welding, Protect the tabless tabs 112, 122.
  • the reinforcing plates 113 and 123 may prevent damage to the plain tabs 112 and 122.
  • the reinforcing plates 113 and 123 prevent crack-like damage to the plain tabs 112 and 122, thereby improving the weldability and welding reliability of the ultrasonic main welding to the plain tabs 112 and 122.
  • FIG. the welding reliability of the reinforcing plates 113 and 123 and the plain tabs 112 and 122 is improved.
  • the horn 71 and the anvil 72 used for the ultrasonic main welding are the first knurled portions 711 and 721 of the first planar area, and the second knurled part of the second planar area smaller than the first planar area. 712, 722.
  • the first and second planar areas mean the yz plane area (refer to FIGS. 8 and 9) set by the unit nulls of the first and second null portions 711, 721; 721, 722.
  • the rechargeable battery of the exemplary embodiment includes connecting tabs 51 and 52 connecting the reinforcing plates 113 and 123 and the electrode terminals (the first and second terminals 41 and 42).
  • the connection tabs 51 and 52 electrically connect the first and second terminals 41 and 42 to the plain tabs 112 and 122 of the electrode assembly 10.
  • the first terminal 41 is installed in the terminal hole H1 of the cap plate 30 and is connected to the rivet terminal 411 and the terminal plate electrically connected to the rivet terminal 411. 412).
  • An external insulation member 61 is interposed between the outer surface of the cap plate 30 and the terminal plate 412, and an internal insulation member 62 is interposed between the inner surface of the cap plate 30 and the connection tab 51.
  • a gasket 63 is interposed between the terminal hole H1 of the cap plate 30 and the rivet terminal 411.
  • the rivet terminal 411 penetrates through the outer insulation member 61 and the terminal plate 412 at the outer surface side of the cap plate 30, and the inner insulation member 62 and the connection tabs at the inner surface side of the cap plate 30 ( Penetrates 51).
  • the rivet terminal 411 By caulking or welding the outside of the penetrating rivet terminal 411 and the periphery of the terminal plate 412 and the inside of the penetrating rivet terminal 411 and the connecting tab 51, the rivet terminal 411 is connected to the terminal. It is fixed to the plate 412.
  • the first terminal 41 and the connection tab 51 are installed in the cap plate 30 with an electrical insulating structure through the inner and inner insulating members 61 and 62 and are connected to the negative electrode 11.
  • the gasket 63 electrically insulates the cap plate 30 and the rivet terminal 411 and seals between the rivet terminal 411 and the terminal hole H1.
  • the second terminal 42 is coupled to and welded to the first protrusion 331 protruding to the outer surface of the cap plate 30.
  • the connection tab 52 electrically connected to the second terminal 42 is coupled to and welded to the second protrusion 332 protruding to the inner surface of the cap plate 30.
  • the second terminal 42 and the connecting tab 52 are electrically connected directly to the cap plate 30.
  • the first and second protrusions 331 and 332 may be formed on the cap plate 30 through a coining process. As a result, the cap plate 30 is connected to the positive electrode 12 integrally with the second terminal 42 to be bipolar.
  • the connecting tabs 51, 52 which are connected to the negative and positive poles 11, 12, have a top plane 511, 521 (xy plane) and a side plane 512 that are bent at right angles. 522) (yz plane).
  • the upper planes 511, 521 are coupled and welded to the rivet terminal 411 and the second protrusion 332 to be electrically connected, and the side planes 512, 522 are formed of the tabs 112, 122. 2, the third welding (W2, W3) is electrically connected.
  • connection tabs 51 and 52 are third welded to the reinforcing plates 113 and 123 on one side (eg, the side planes 512 and 522).
  • the third welding W3 connects the connection tabs 51 and 52 to the ultrasonically welded plain tabs 112 and 122 and the reinforcing plates 113 and 123 by laser welding.
  • the electrode assembly 10 is electrically connected to the first and second electrodes 41 and 42.
  • FIG. 8 is a front view showing a first embodiment of the state in which the plain tabs and the reinforcing plate are ultrasonically welded in a state and after the main welding, they are laser welded to the connecting tab.
  • the plain tabs 112 and 122 and the reinforcing plates 113 and 123 of the second welding W2 may be formed of the first and second null welds KW1 and KW2. It includes.
  • the first knurled weld KW1 is shown side by side in two rows along the y-axis direction, and the second knurled weld KW2 includes It is shown in one line between the 1 knurls KW1.
  • the first knurled weld KW1 is ultrasonically welded in the yz plane outside of the plain tabs 112 and 122 and the reinforcing plates 113 and 123 by the first knurled portions 711 and 721 of the first planar area. do.
  • the second null weld KW2 is ultrasonically welded by the second null portions 712 and 722 of the second planar area smaller than the first planar area inside the first null weld KW1.
  • the first null weld KW1 is ultrasonically welded to the first depths D11 and D21 of the first null portions 711 and 721. Despite the deep depth as in the first depths D11 and D21, the reinforcing plates 113 and 123 prevent the plain tabs 112 and 122 from contacting the horn 71 and the anvil 72, thereby making the plain portion To prevent damage to the tabs 112, 122.
  • the second null weld KW2 is ultrasonically welded to the second depths D12 and D22 of the second null portions 712 and 722 that are shallower than the first depths D11 and D21. Since the first knurled weld KW1 welds the reinforcing plates 113 and 123 and the plain tabs 112 and 122 sufficiently, the second knurled weld KW2 is ultrasonically depressed at a low depth of the second depths D12 and D22. Can be welded.
  • the first knurled weld KW1 and the reinforcing plates 113 and 123 are ultrasonically welded to the lower second depths D12 and D22 so that they are less damaged than in the first knurled weld KW1. . Therefore, the second board welding part KW2 may further secure uniformity of laser welding during the third welding W3.
  • the second null weld KW2 is formed in the entire width direction (y-axis direction) of the plain tabs 112 and 122.
  • the third welding W3 may be performed at the second null welding part KW2 in the entire width direction (y-axis direction). Accordingly, the second null weld KW2 may uniformly transmit current to the reinforcing plates 113 and 123 and the connection tabs 51 and 52 in the entire width direction of the plain tabs 112 and 122.
  • the reinforcing plates 113 and 123 are disposed on both sides of the welded plain tabs 112 and 122 to be ultrasonically main welded. In this case, damage to the non-coated tabs 112 and 122 by the first knurled portions 711 and 721 and the second knurled portions 712 and 722 of the horn 71 and the anvil 72 can be prevented from both sides.
  • the reinforcing plate may be disposed on any one surface of the welded non-coated tabs and ultrasonically welded.
  • the insulating member 70 electrically insulates the electrode assembly 10 from the cap plate 30 and draws out the tabs 112 and 122 from each other, and the second and third welding ( In order to process W2 and W3, first cutouts 751 and 761 and second cutouts 752 and 762 are provided.
  • the first cutouts 751 and 761 are formed in the xy plane and open to allow the tabs 112 and 122 to be pulled out from the electrode assembly 10 in the direction toward the cap plate 30 (z-axis direction). do.
  • the second cutouts 752 and 762 are formed in the yz plane and open to weld the plain tabs 112 and 122 and the reinforcing plates 113 and 123 to the connection tabs 51 and 52. That is, the second cutouts 752 and 762 open in the x-axis direction to allow insertion and withdrawal of the horn 71 and the anvil 72.
  • Fig. 9 is a front view showing a second embodiment of the state in which the plain tabs and the reinforcing plate are ultrasonically welded to the connecting tab and laser welded to the connecting tab after the main welding.
  • the second null weld KW22 is formed at the center portion of the width direction (y-axis direction) of the plain tabs 112 and 122.
  • the first null welding part KW21 is ultrasonically welded in the yz plane outside of the plain tabs 112 and 122 and the reinforcing plates 113 and 123 by the first knurl part of the first planar area.
  • the second null weld KW22 is ultrasonically welded by the second null portion of the second planar area smaller than the first planar area inside the first null weld KW21.
  • the first null weld KW21 and the reinforcement plates 113 and 123 are ultrasonically welded to the second depth of the second null portion lower than the first depth, so that the first null weld KW21 and the first null weld KW21 Less damaged. Accordingly, the second board welding part KW22 may further secure uniformity of laser welding during the third welding W23.
  • electrode assembly 11 first electrode (cathode)
  • cap plate 31 electrolyte injection hole
  • vent hole 41, 42 first and second terminals
  • connection tab 61 external insulation member
  • sealing stopper 321 vent plate

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Une batterie rechargeable selon un mode de réalisation de la présente invention comprend : un boîtier pour recevoir un ensemble d'électrodes; une plaque de capuchon couplée à une ouverture du boîtier; une borne d'électrode disposée sur la plaque de capuchon; une plaque de renfort connectée, par l'intermédiaire d'un second soudage, à des pattes de partie non revêtues qui sont tirées hors de l'ensemble d'électrodes et sont reliées les unes aux autres par l'intermédiaire d'un premier soudage; et une languette de connexion connectée à la plaque de renfort par l'intermédiaire d'un troisième soudage sur un côté de celle-ci et connectée à la borne d'électrode au niveau de l'autre côté de celle-ci.
PCT/KR2018/001102 2017-04-25 2018-01-25 Batterie rechargeable WO2018199439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0053040 2017-04-25
KR1020170053040A KR102444273B1 (ko) 2017-04-25 2017-04-25 이차 전지

Publications (1)

Publication Number Publication Date
WO2018199439A1 true WO2018199439A1 (fr) 2018-11-01

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PCT/KR2018/001102 WO2018199439A1 (fr) 2017-04-25 2018-01-25 Batterie rechargeable

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KR (1) KR102444273B1 (fr)
WO (1) WO2018199439A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020120726A1 (fr) * 2018-12-14 2020-06-18 Volkswagen Ag Dispositif de soudage par ultrasons ainsi que procédé de fabrication d'une pile de feuilles métalliques
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CN113228404A (zh) * 2019-02-21 2021-08-06 三星Sdi株式会社 二次电池及用于制造该二次电池的方法
CN115832628A (zh) * 2023-02-09 2023-03-21 深圳海润新能源科技有限公司 储能装置及用电设备

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