WO2022182143A1 - 이차전지, 이차전지 제조방법, 배터리 팩 및 자동차 - Google Patents
이차전지, 이차전지 제조방법, 배터리 팩 및 자동차 Download PDFInfo
- Publication number
- WO2022182143A1 WO2022182143A1 PCT/KR2022/002676 KR2022002676W WO2022182143A1 WO 2022182143 A1 WO2022182143 A1 WO 2022182143A1 KR 2022002676 W KR2022002676 W KR 2022002676W WO 2022182143 A1 WO2022182143 A1 WO 2022182143A1
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- WIPO (PCT)
- Prior art keywords
- battery
- washer
- secondary battery
- conductive washer
- top cap
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 238000002788 crimping Methods 0.000 claims description 53
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- 239000006227 byproduct Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
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- 239000002803 fossil fuel Substances 0.000 description 1
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- 239000011810 insulating material Substances 0.000 description 1
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- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape 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
- H01M50/10—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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a secondary battery, a secondary battery manufacturing method, a battery pack, and a vehicle.
- Secondary batteries that are easy to apply according to product groups and have electrical characteristics such as high energy density are not only portable devices but also electric vehicles (EVs) or hybrid vehicles (HEVs) driven by an electric drive source. It is universally applied.
- EVs electric vehicles
- HEVs hybrid vehicles
- the types of secondary batteries currently widely used include a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and the like.
- the operating voltage of the unit secondary battery secondary battery that is, the unit battery secondary battery is about 2.5V to 4.5V. Accordingly, when a higher output voltage is required, a battery pack may be configured by connecting a plurality of secondary battery batteries in series. In addition, a plurality of secondary battery batteries may be connected in parallel to form a battery pack according to the charge/discharge capacity required for the battery pack. Accordingly, the number and electrical connection types of secondary batteries included in the battery pack may be variously set according to a required output voltage and/or charge/discharge capacity.
- a plurality of cylindrical secondary batteries are usually erected in a housing, and the upper and lower ends of the cylindrical secondary battery are used as positive and negative terminals, respectively, to form a plurality of cylindrical secondary batteries. electrically connect them to each other.
- the negative electrode uncoated portion of the electrode assembly accommodated in the battery can extends downward to be electrically connected to the bottom surface of the battery can, and the positive uncoated portion extends upward and is electrically connected to the top cap. to be. That is, in a cylindrical secondary battery, it is common that the bottom surface of the battery can is used as the negative terminal, and the top cap that covers the upper opening of the battery can is used as the positive terminal.
- the present invention provides a secondary battery and a method for manufacturing a secondary battery capable of realizing high energy density by having a structure in which a positive terminal and a negative terminal are applied in the same direction, and the conductive washer part is applicable without limitation in its thickness and material want to
- Another object of the present invention is to provide a battery pack and a vehicle including the secondary battery as described above.
- One embodiment of the present invention is an electrode assembly having a first electrode tab and a second electrode tab; a battery can having an opening for accommodating the electrode assembly and electrically connected to the second electrode tab; a top cap covering the opening of the battery can and electrically connected to the first electrode tab; a gasket provided between the battery can and the top cap; a conductive washer electrically connected to the battery can and in contact with at least a portion of the periphery of the opening; an insulating washer provided between the top cap and the conductive washer to electrically insulate the top cap and the conductive washer; and a fixing member provided between the conductive washer and the insulating washer.
- Another embodiment of the present invention comprises the steps of accommodating an electrode assembly having a first electrode tab and a second electrode tab in a battery can having an opening for accommodating the electrode assembly and electrically connected to the second electrode tab ;
- a top cap electrically connected to the first electrode tab in the opening of the battery can, a gasket provided between the battery can and the top cap, and a conductivity electrically connected to the battery can and in contact with at least a portion of a periphery of the opening covering the opening of the battery can by coupling a washer and an insulating washer provided between the top cap and the conductive washer and electrically insulating the top cap and the conductive washer; and injecting a curing agent between the conductive washer and the insulating washer.
- Another embodiment of the present invention is a secondary battery according to the above-described embodiment; and a pack housing accommodating the secondary battery.
- Another embodiment of the present invention provides a vehicle including the battery pack according to the above-described embodiment.
- a conductive washer part and an insulating washer may be introduced to expand the negative terminal.
- the conductive washer part is provided for the purpose of expanding the area to which connection parts such as a bus bar can be joined to connect a plurality of cylindrical secondary batteries for constituting the pack, and due to this function, It must have a certain level of rigidity to resist deformation.
- the conductive washer placed on the crimping part for closing the opening of the cylindrical secondary battery because there is height dispersion due to assembling.
- a method of fixing the conductive washer using an insulator provided between the conductive washer and the top cap can be considered.
- the conductive washer must have a certain degree of rigidity, and the thickness must be at least a certain level.
- the electrical resistance is high in the process of the current flowing through the conductive washer toward the upper bus bar, resulting in electrical damage.
- a one-way electrical connection is implemented in which a positive terminal and a negative terminal are applied in the same direction, but connection parts such as a bus bar for electrical connection between the secondary battery and the secondary battery are combined
- connection parts such as a bus bar for electrical connection between the secondary battery and the secondary battery are combined
- FIG. 1 is a view showing the appearance of a cylindrical secondary battery according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view illustrating an internal structure of a cylindrical secondary battery according to an embodiment of the present invention.
- FIG. 3 is a schematic view showing a part of a cylindrical secondary battery according to an embodiment of the present invention, (a) is an enlarged cross-sectional view showing a conductive washer in contact with a crimping part, (b) is provided between the conductive washer and the insulating washer It is an enlarged cross-sectional view showing the fixed member.
- 4 to 7 are partial cross-sectional views illustrating an upper structure of a cylindrical secondary battery according to an embodiment of the present invention.
- FIG 8 and 9 are views showing a current collecting plate applied to the present invention.
- FIGS. 10 and 11 are cross-sectional views illustrating a coupling structure of a current collecting plate and an electrode assembly applied to the present invention.
- FIG. 12 is a partial cross-sectional view illustrating a lower structure of a cylindrical secondary battery according to an embodiment of the present invention.
- FIG. 13 is a view showing a lower surface of a cylindrical secondary battery according to an embodiment of the present invention.
- FIG. 14 is a schematic diagram illustrating a battery pack according to an embodiment of the present invention.
- 15 is a conceptual diagram illustrating a vehicle according to an embodiment of the present invention.
- An exemplary embodiment of the present invention includes an electrode assembly 10 having a first electrode tab 11 and a second electrode tab 12; a battery can 20 having an opening for accommodating the electrode assembly 10 and electrically connected to the second electrode tab 12; a top cap 30 covering the opening of the battery can 20 and electrically connected to the first electrode tab 11; a gasket 50 provided between the battery can 20 and the top cap 30; a conductive washer 40 electrically connected to the battery can 20 and in contact with at least a portion of the periphery of the opening; an insulating washer 60 provided between the top cap 30 and the conductive washer 40 and electrically insulating the top cap 30 and the conductive washer 40; and a fixing member (61) provided between the conductive washer (40) and the insulating washer (60).
- the secondary battery includes the conductive washer 40 and the insulating washer 60 , it is possible to implement a one-way electrical connection in which the positive terminal and the negative terminal are applied in the same direction.
- the secondary battery includes the fixing member 61, the conductive washer component can be applied without being limited in its thickness and material, which is advantageous in securing low electrical resistance.
- the secondary battery may be a cylindrical secondary battery, and the first electrode tab 11 is an uncoated region in which the first electrode active material is not formed among the first electrode current collectors constituting the electrode assembly, and the second electrode tab ( 12) may be an uncoated region in which the second electrode active material is not formed among the second electrode current collectors constituting the electrode assembly.
- the first electrode tab 11 and the second electrode tab 12 may be bent toward a winding center of the electrode assembly.
- a cylindrical secondary battery 1 includes an electrode assembly 10 , a battery can 20 , a top cap 30 , a conductive washer 40 , and a gasket. 50 , an insulating washer 60 and a fixing member 61 .
- the cylindrical secondary battery 1 may further include a current collecting plate 70 and/or an insulating plate 80 and/or a connection plate 90 in addition to the above-described components.
- the electrode assembly 10 includes a first electrode plate having a first polarity, a second electrode plate having a second polarity, and a separator provided between the first electrode plate and the second electrode plate.
- the electrode assembly 10 may have a jelly-roll shape. That is, the electrode assembly 10 may be manufactured by winding a stack formed by sequentially stacking a first electrode plate, a separator, and a second electrode plate at least once with the winding center C as a reference. In this case, a separator may be provided on the outer peripheral surface of the electrode assembly 10 to insulate it from the battery can 20 .
- the first electrode plate is a positive electrode plate or a negative electrode plate
- the second electrode plate corresponds to an electrode plate having a polarity opposite to that of the first electrode plate.
- the first electrode plate may be a positive electrode plate
- the second electrode plate may be a negative electrode plate.
- the first electrode plate includes a first electrode current collector and a first electrode active material coated on one or both surfaces of the first electrode current collector.
- An uncoated region to which the first electrode active material is not applied is present at one end of the first electrode current collector in the width direction (parallel to the Z-axis).
- the uncoated region functions as the first electrode tab 11 .
- the first electrode tab 11 is provided above the electrode assembly 10 accommodated in the battery can 20 in the height direction (parallel to the Z-axis).
- the second electrode plate includes a second electrode current collector and a second electrode active material coated on one or both surfaces of the second electrode current collector.
- An uncoated region to which the second electrode active material is not applied is present at the other end of the second electrode current collector in the width direction (parallel to the Z-axis).
- the uncoated region functions as the second electrode tab 12 .
- the second electrode tab 12 is provided below the electrode assembly 10 accommodated in the battery can 20 in the height direction (parallel to the Z-axis).
- first electrode tab 11 may be provided at one end of the electrode assembly, and the second electrode tab may be provided at the other end of the electrode assembly.
- the battery can 20 may have a cylindrical shape, which is a cylindrical container having an opening formed therein, and is made of a conductive metal material.
- the battery can 20 accommodates the electrode assembly 10 through the opening, and also accommodates the electrolyte.
- the battery can 20 is electrically connected to the second electrode tab 12 of the electrode assembly 10 . Accordingly, the battery can 20 has the same polarity as the second electrode tab 12 .
- the second electrode tab 12 may be welded to the battery can 20 .
- the battery can 20 includes a beading portion 21 and a crimping portion 22 formed on the upper end thereof.
- the crimping part 22 may be provided on the periphery of the opening of the battery can 20 .
- the beading part 21 is formed on the electrode assembly 10 .
- the beading part 21 is formed by press-fitting the outer peripheral surface of the battery can 20 .
- the beading part 21 prevents the electrode assembly 10 having a size corresponding to the width of the battery can 20 from escaping through the upper opening of the battery can 20 , and a support part on which the top cap 30 is seated. can function as
- the crimping part 22 is formed on the beading part 21 .
- the crimping part 22 has an extended and bent shape so as to surround a portion of an outer peripheral surface of the top cap 30 disposed on the beading part 21 and a portion of an upper surface of the top cap 30 .
- the battery can may have a cylindrical shape, and may have a diameter of 30 mm to 55 mm and a height of 60 mm to 120 mm at both ends.
- the circular diameter x height of the cylindrical battery can may be 46 mm x 60 mm, 46 mm x 80 mm, or 46 mm x 90 mm, or 46 mm x 120 mm.
- the cylindrical secondary battery is, for example, a cylindrical secondary battery having a form factor ratio (defined as the ratio of the diameter of the cylindrical secondary battery divided by the height, that is, the ratio of the height (H) to the diameter ( ⁇ )) is greater than about 0.4 can be
- the form factor means a value indicating the diameter and height of the cylindrical secondary battery.
- the cylindrical secondary battery according to an embodiment of the present invention may be, for example, a 46110 cell, a 48750 cell, a 48110 cell, a 48800 cell, a 46800 cell, and a 46900 cell.
- the first two numbers indicate the diameter of the cell
- the next two numbers indicate the height of the cell
- the last number 0 indicates that the cell has a circular cross section.
- the cylindrical secondary battery according to an embodiment of the present invention may be a cylindrical secondary battery having a substantially cylindrical cell shape, a diameter of about 46 mm, a height of about 110 mm, and a form factor ratio of about 0.418.
- a cylindrical secondary battery according to another embodiment may be a battery cell having a substantially cylindrical shape, a diameter of about 48 mm, a height of about 75 mm, and a form factor ratio of about 0.640.
- a cylindrical secondary battery according to another embodiment may be a cylindrical secondary battery having a substantially cylindrical cell shape, a diameter of about 48 mm, a height of about 110 mm, and a form factor ratio of about 0.418.
- a cylindrical secondary battery according to another embodiment may be a battery cell having a substantially cylindrical shape, a diameter of about 48 mm, a height of about 80 mm, and a form factor ratio of about 0.600.
- a cylindrical secondary battery according to another embodiment may be a cylindrical secondary battery having a substantially cylindrical cell shape, a diameter of about 46 mm, a height of about 80 mm, and a form factor ratio of about 0.575.
- a cylindrical secondary battery according to another embodiment may be a cylindrical secondary battery having a substantially cylindrical shape, a diameter of about 46 mm, a height of about 90 mm, and a form factor ratio of 0.511.
- the battery can 20 may further include a venting part 23 formed on a lower surface thereof.
- the venting part 23 corresponds to a region having a thinner thickness compared to a peripheral region of the lower surface of the battery can 20 .
- the venting part 23 is structurally weak compared to the surrounding area. Accordingly, when an abnormality occurs in the cylindrical secondary battery 1 and the internal pressure increases to a certain level or more, the venting part 23 is broken and the gas generated inside the battery can 20 is discharged.
- the cylindrical secondary battery 1 has a structure in which both a positive terminal and a negative terminal are present on the upper part, and thus the upper structure is more complicated than the lower structure. Therefore, the venting part 23 may be included on the lower surface of the battery can 20 to smoothly discharge the gas generated inside the battery can 20 .
- venting part 23 is continuously formed in a circle on the lower surface of the battery can 20 , but the present invention is not limited thereto.
- the venting part 23 may be discontinuously formed while drawing a circle on the lower surface of the battery can 20 , or may be formed in a straight line or other shape.
- the top cap 30 is a component made of a conductive metal material and covers the opening of the battery can 20 .
- the top cap 30 is electrically connected to the first electrode tab 11 of the electrode assembly 10 and is electrically insulated from the battery can 20 . Accordingly, the top cap 30 may function as a first electrode terminal of the cylindrical secondary battery 1 .
- the top cap 30 is seated on the beading part 21 formed on the battery can 20 , and is fixed by the crimping part 22 .
- the top cap 30 may include a protrusion 31 protruding outwardly of the battery can.
- the protrusion 31 may protrude higher than the upper surface of the conductive washer 40, which will be described later, so as to facilitate contact with an electrical connection component such as a bus bar.
- the upper surface refers to the outer direction of the battery can of the cylindrical battery, that is, the direction in which the opening is located, and the lower surface refers to the direction in which the bottom surface of the battery can is located.
- the gasket 50 may be provided between the battery can and the top cap or between the top cap 30 and the crimping part 22 of the battery can 20 , which This is for securing airtightness and for electrical insulation between the battery can 20 and the top cap 30 .
- the conductive washer 40 is made of a metal material having conductivity, and is a component having a substantially disk shape with a hole formed in the center thereof.
- the conductive washer 40 extends from the outer portion of the upper surface of the conductive washer 40 in contact with the periphery of the opening of the battery can toward the center, and the protrusion 31 of the top cap 30 is exposed at the center.
- a hole is formed so that it can be
- the upper surface refers to the outer direction of the battery can of the cylindrical battery, that is, the direction in which the opening is located, and the lower surface refers to the direction in which the bottom surface of the battery can is located.
- the center refers to a central area of the upper and/or lower surfaces of the conductive washer 40 .
- the conductive washer 40 is electrically connected to the battery can and may be in contact with at least a portion of the periphery of the opening or on the crimping portion 22 of the battery can 20 . That is, the secondary battery has a crimping part on the periphery of the opening of the battery can, and the conductive washer 40 is in contact with the crimping part 22 .
- the conductive washer 40 may have the same polarity as that of the battery can by being in contact with the crimping part 22 , and may function as a second electrode terminal having a second polarity.
- the conductive washer 40 may be coupled to the crimping portion 22 , and the coupling may be performed, for example, by welding, and the welding may be laser welding.
- the conductive washer 40 is electrically insulated from the top cap 30 .
- the top cap 30 is exposed through a hole formed in the center of the conductive washer 40 , and the conductive washer 40 and the protrusion 31 of the top cap 30 are spaced apart from each other.
- the conductive washer 40 is vertically spaced apart from the remaining portions except for the protrusion 31 of the top cap 30 . Accordingly, the conductive washer 40 is electrically connected to the second electrode tab 12 and the battery can 20 , and may function as a second electrode terminal of the cylindrical secondary battery 1 .
- the cylindrical secondary battery 1 includes the conductive washer 40 so that both the first electrode terminal having the first polarity and the second electrode terminal having the second polarity are the same. It has a structure arranged in the direction.
- the width D2 of the conductive washer 40 is greater than the width D1 of the top surface of the crimping portion 22 of the battery can 20 .
- the coupling area between the electrical connection component and the conductive washer 40 can be enlarged. in order to make it In this way, as the bonding area between the electrical connection part and the conductive washer 40 is enlarged, the welding process can be performed smoothly, the fastening force between the two parts can be improved, and the electrical resistance at the coupling part can be reduced. have.
- the upper surface refers to the outer direction of the battery can of the cylindrical battery, that is, the direction in which the opening is located, and the lower surface refers to the direction in which the bottom surface of the battery can is located.
- the width D2 of the conductive washer 40 means a length extending from the outer edge of the top surface of the conductive washer 40 in contact with the periphery of the opening of the battery can toward the center.
- the width D1 of the upper surface of the crimping part 22 means a length extending from the outer edge of the upper surface of the battery can toward the center at the periphery of the opening of the battery can.
- the upper surface of the crimping portion 22 means a portion at the end of the crimping portion 22 excluding the curved portion surrounding the side and corner portions of the crimping portion 22 .
- the width D2 of the conductive washer 40 may be set differently according to the diameter of the secondary battery.
- the cylindrical secondary battery is a cell in a substantially cylindrical shape, and for example, the width D2 of the conductive washer 40 may be 10% or more, 11% or more, 12% or more, or 13% or more of the maximum diameter of the cell.
- the cylindrical secondary battery is a cell in a substantially cylindrical shape, and for example, the width D2 of the conductive washer 40 may be 50% or less, 45% or less, 43% or less, or 40% or less of the maximum diameter of the cell.
- the width D1 of the upper surface of the crimping part 22 is smaller than the width D2 of the conductive washer 40 .
- the cylindrical secondary battery is a cell having a substantially cylindrical shape, and for example, the width D1 of the upper surface of the crimping part 22 may be 1% or more, 2% or more, or 3% or more of the maximum diameter of the cell.
- a cylindrical secondary battery is a cell in a substantially cylindrical shape, and for example, the width D1 of the upper surface of the crimping part 22 may be 13% or less, 12% or less, 11% or less, or 10% or less of the maximum diameter of the cell. have.
- the sum of the thickness T1 of the crimping portion 22 at the portion in contact with the conductive washer 40 and the thickness T2 of the conductive washer 40 in contact with the crimping portion 22 is the 90% to 200% of the thickness T' of the conductive washer 40 not in contact with the crimping portion 22 .
- the thickness T1 of the crimping part 22 may be 0.1 mm or more, 0.15 mm or more, 0.2 mm or more, 0.25 mm or more, 0.3 mm or more, or 0.35 mm or more.
- the thickness T1 of the crimping part 22 may be 0.75 mm or less, 0.7 mm or less, 0.65 mm or less, 0.6 mm or less, 0.55 mm or less, or 0.5 mm or less.
- the thickness T2 of the conductive washer 40 in contact with the crimping part 22 may be 0.25 mm or more, 0.3 mm or more, 0.35 mm or more, or 0.4 mm or more.
- the thickness T2 of the conductive washer 40 in contact with the crimping part 22 may be 0.65 mm or less, 0.6 mm or less, 0.55 mm or less, or 0.5 mm or less.
- the thickness T' of the conductive washer 40 not in contact with the crimping part 22 may be 0.4 mm or more, 0.45 mm or more, or 0.5 mm or more.
- the thickness T' of the conductive washer 40 not in contact with the crimping part 22 may be 0.7 mm or less, 0.65 mm or less, or 0.6 mm or less.
- the thickness of the conductive washer is formed differently depending on the region, the thickness of the metal on all paths of the electric current becomes the same, thereby reducing the overall resistance.
- the battery can 20 may include an insertion groove 22a provided on the upper surface of the crimping part 22 , and the conductive washer 40 may correspond to the insertion groove 22a. It has a shape and may include an insertion protrusion 41 coupled to the insertion groove 22a.
- the insertion groove 22a and the insertion protrusion 41 may enlarge the contact area between the conductive washer 40 and the crimping part 22, thereby improving the fastening force and reducing the electrical resistance at the bonding site.
- the insertion groove 22a and the insertion protrusion 41 guide the seating position of the conductive washer 40 in seating the crimping part 22 on the conductive washer 40 and the top cap 30 . Contact between the protrusions 31 can be prevented.
- the insertion groove 22a and the insertion protrusion 41 may improve fairness by preventing the conductive washer 40 from moving on the crimping part 22 during the welding process.
- the insulating washer 60 is provided between the top cap 30 and the conductive washer 40 and electrically insulates the top cap 30 and the conductive washer 40 .
- the insulating washer 60 is made of an insulating material.
- the top cap 30 functions as a first electrode terminal having a first polarity and the conductive washer 40 has a second polarity opposite to the first polarity. Since it functions as a second electrode terminal having a polarity, the top cap 30 and the conductive washer 40 must maintain an electrically insulating state. Therefore, it is advantageous that the insulating washer 60 is applied to stably maintain such an insulating state.
- the insulating washer 60 may be provided between the lower surface of the conductive washer 40 and the top cap 30 .
- the conductive washer 40 has a width D2 greater than the width D1 of the upper surface of the crimping portion 22, and the protrusion 31 of the top cap 30 from the crimping portion 22. It has a shape extending in the direction toward Accordingly, the insulating washer 60 is formed on the inner surface of the hole formed in the center of the conductive washer 40 so that the inner surface of the hole formed in the conductive washer 40 and the protrusion 31 of the top cap 30 cannot contact each other. It may have an extended shape to cover the .
- the insulation washer 60 When the insulation washer 60 is made of a resin material, the insulation washer 60 may be coupled to the top cap 30 by thermal fusion. In this case, airtightness at the bonding interface between the insulating washer 60 and the top cap 30 may be enhanced.
- the fixing member 61 is provided between the conductive washer 40 and the insulating washer 60 , or the fixing member 61 is the conductive washer 40 and the insulating washer 60 .
- Two surfaces facing the washer 60 may be in direct contact with each other. Direct contact means that the fixing member 61 is located only on the interface between the conductive washer 40 and the insulating washer 60, and does not flow down or overflow in other ranges. In this case, it is possible to advantageously fix the conductive washer despite the height dispersion of about 0.1 mm to 0.2 mm occurring during the crimping process of the cell assembly process.
- the conductive washer 40 and the insulating washer 60 may be coupled to each other by the fixing member 61 , and airtightness at the bonding interface between the conductive washer 40 and the insulating washer 60 may be enhanced.
- FIG. 3 is a schematic view showing a part of a cylindrical secondary battery according to an embodiment of the present invention, (a) is an enlarged cross-sectional view showing a conductive washer in contact with the upper surface of the crimping part, (b) is provided between the conductive washer and the insulating washer It is an enlarged cross-sectional view showing the fixed member.
- the cylindrical secondary battery prevents contact between the conductive washer 40 and the conductive washer insulating washer 40 and the top cap 30 applied for the expansion of the negative terminal. It includes an insulating washer 60 for
- the conductive washer 40 is to sufficiently secure an area for welding a connection component (eg, a bus bar) to manufacture a battery pack through connection of a plurality of cylindrical secondary batteries, and is a crimped area of a cylindrical secondary battery. Due to the nature of the crimping process made through bending of the metal, height dispersion may occur (indicated by arrows) on the upper surface of the upper surface, and this may make it difficult for the conductive washer 40 to be well fixed on the crimping part 22 .
- a connection component eg, a bus bar
- the conductive washer 40 may be structurally fixed using an insulating washer 60. In addition, it must be secured at a certain level or more, and the material selection range of the conductive washer 40 may be narrowed due to restrictions on rigidity and/or thickness.
- the fixing member may be, for example, a curing agent.
- the curing agent is injected through a nozzle and may be provided at the bonding interface between the conductive washer 40 and the insulating washer 60.
- the curing agent is injected in a liquid state in a fluid state and hardens over time, it is employed in the present invention.
- the curing agent may be a UV resin, and is not particularly limited as long as it is used as a curing agent in the art.
- the curing agent may be provided in 10%, 15%, 20%, 25%, or 30% or more of an area in contact with the conductive washer and the insulating washer. In this range, the conductive washer fixed by the curing agent is not deformed even by an external pressing force.
- the curing agent is to prevent the conductive washer from being deformed by an empty space when an external pressing force is applied.
- the curing agent is not limited to an area in which the conductive washer and the insulating washer contact each other as long as the curing agent can maintain rigidity even with an external pressing force.
- the rigidity of the conductive washer is not particularly required, it is possible to select a material under a condition of low electrical resistance, and since there is no restriction on the thickness of the conductive washer, the conductive washer It is advantageous in terms of energy density as it is possible to prevent an increase in the overall volume of the secondary battery due to the application of
- the insulating washer 60 may have a shape extending to cover an area of 1% or more, 2% or more, 3% or more, or 4% or more of the total area of the upper surface of the conductive washer 40. .
- the insulating washer 60 may extend to cover an area of 10% or less, 9% or less, 8% or less, or 7% or less of the total area of the upper surface of the conductive washer 40 .
- the extended width C of the insulating washer 60 to cover a portion of the upper surface of the conductive washer 40 is 0.1 mm or more, 0.15 mm or more, 0.2 mm or more, 0.25 mm or more, 0.3 mm or more, or 0.35 mm or more.
- the width C of which the first insulating member 60 extends to cover a portion of the upper surface of the conductive washer 40 may be 3 mm or less, 2.5 mm or less, 2 mm or less, 1.5 mm or less, 1 mm or less, or 0.5 mm or less. have.
- the width C extended so that the insulation washer 60 covers a part of the upper surface of the conductive washer 40 is the width D2 of the conductive washer 40 from the center direction to the outer portion direction of the insulation washer ( 60) means the length of the part covered by
- the width D2 of the conductive washer 40 may be set differently according to the diameter of the secondary battery.
- the cylindrical secondary battery is a cell in a substantially cylindrical shape, and for example, the width D2 of the conductive washer 40 may be 10% or more, 11% or more, 12% or more, or 13% or more of the maximum diameter of the cell.
- the cylindrical secondary battery is a cell in a substantially cylindrical shape, and for example, the width D2 of the conductive washer 40 may be 50% or less, 45% or less, 43% or less, or 40% or less of the maximum diameter of the cell.
- the process of seating the conductive washer 40 on the crimping part 22 can be performed more accurately and quickly. have.
- the assembly comprising the conductive washer 40 and the insulating washer 60 is crimped with a crimping part 22 and By seating it on the top cap 30 , the conductive washer 40 can be naturally seated in an accurate position.
- the protrusion 31 of the top cap 30 is exposed outwardly of the battery can through a hole formed in the center of the insulating washer 60 .
- the combination of the insulating washer 60 and the conductive washer 40 shown in FIG. 6 may be manufactured by insert injection. That is, a combination of the insulating washer 60 and the conductive washer 40 can be manufactured by insert injection so that the conductive washer 40 made of a metal material is inserted/fixed into the insulating washer 60 made of a resin material. By arranging on the crimping part 22 and the top cap 30, it is possible to bring about the effect of natural alignment.
- the current collecting plate 70 is coupled to an upper portion of the electrode assembly 10 .
- the current collecting plate 70 is made of a conductive metal material and is connected to the first electrode tab 11 .
- a lead 72 may be connected to the current collecting plate 70 , and the lead 72 extends upward of the electrode assembly 10 and is directly coupled to the top cap 30 or coupled to the lower surface of the top cap 30 . It may be coupled to the connecting plate 90 to be.
- the current collecting plate 70 may include a plurality of sub-plates 71 radially extending from the center.
- the current collecting plate 70 and the lead 72 may be integrally formed.
- the lead 72 may have an elongated plate shape extending outward from the center of the current collecting plate 70 , and may be formed between the sub-plates 71 adjacent to each other.
- the structure of the current collecting plate 70 of the present invention is not limited thereto, and may have a shape corresponding to the upper surface of the electrode assembly 10 so as to completely cover the upper portion of the first electrode tab 11 .
- the current collecting plate 70 may include a plurality of radially formed irregularities on a lower surface thereof. When the unevenness is formed, the unevenness may be press-fitted into the electrode tabs 11 and 12 by pressing the current collecting plate 70 .
- the current collecting plate 70 is coupled to an end of the first electrode tab 11 .
- the coupling between the first electrode tab 11 and the current collecting plate 70 may be performed, for example, by laser welding.
- the laser welding may be performed by partially melting the base material of the current collecting plate 70 , or may be performed with solder for welding interposed between the current collecting plate 70 and the first electrode tab 11 .
- the solder may have a lower melting point compared to the current collecting plate 70 and the first electrode tab 11 .
- the current collecting plate 70 may be coupled to a coupling surface formed by bending an end of the first electrode tab 11 in a direction parallel to the current collecting plate 70 .
- the bending direction of the first electrode tab 11 may be, for example, a direction toward a winding center of the electrode assembly 10 .
- the space occupied by the first electrode tab 11 may be reduced, thereby improving energy density.
- the current collecting plate 70 may also be coupled to the lower surface of the electrode assembly 10 .
- one surface of the current collecting plate 70 is coupled to the second electrode tab 12 of the electrode assembly 10 by welding, and the opposite surface is welded to the inner bottom surface of the battery can 20 by welding. can be combined.
- a coupling structure of the current collecting plate 70 coupled to the lower surface of the electrode assembly 10 and the second electrode tab 12 is substantially the same as the current collecting plate 70 coupled to the upper surface of the electrode assembly 10 described above. do.
- the second electrode tab 12 may also have a shape bent in a direction toward the winding center of the electrode assembly 10 .
- the insulating plate 80 is disposed between the upper end of the electrode assembly 10 and the beading portion 21 or between the current collecting plate 70 and the beading portion 21 coupled to the upper portion of the electrode assembly 10 to form the first electrode A contact between the tab 11 and the battery can 20 or between the current collecting plate 70 and the battery can 20 is prevented.
- the insulating plate 80 has a lead hole 81 through which a lead 72 extending upwardly from the current collecting plate 70 or from the first electrode tab 11 can be drawn out.
- the cylindrical secondary battery 1 includes a top cap 30 provided on one side of the battery can 20 in the longitudinal direction (a direction parallel to the Z axis in FIG. 2 ) and
- the conductive washer 40 has a structure that can be used as a first electrode terminal and a second electrode terminal, respectively. Therefore, in the case of electrically connecting a plurality of cylindrical secondary batteries 1 according to an embodiment of the present invention, it is possible to arrange an electrical connection part such as a bus bar on only one side of the cylindrical secondary battery 1 . , thereby simplifying the structure and improving the energy density.
- an electrode assembly 10 having a first electrode tab and a second electrode tab has an opening for accommodating the electrode assembly, and the battery can 20 is electrically connected to the second electrode tab. to accommodate;
- an electrode assembly 10 having a first electrode tab and a second electrode tab has an opening for accommodating the electrode assembly, and the battery can 20 is electrically connected to the second electrode tab. to accommodate;
- the curing agent may be injected through a nozzle, and as described above, if it is injected in a fluid state and hardens over time, it may be employed in the present invention.
- the injection includes injecting a curing agent between the conductive washer 40 and the insulating washer 60 or applying a curing agent on the insulating washer 60 .
- a battery pack 3 includes a secondary battery assembly to which the secondary battery 1 according to an embodiment of the present invention is electrically connected as described above, and a pack housing accommodating the same. (2) is included.
- components such as a bus bar and a power terminal for electrical connection are omitted for convenience of illustration.
- a vehicle 5 may be, for example, an electric vehicle, and includes a battery pack 3 according to an embodiment of the present invention.
- the vehicle 5 operates by receiving power from the battery pack 3 according to an embodiment of the present invention.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (23)
- 제1 전극 탭 및 제2 전극 탭을 구비하는 전극 조립체;상기 전극 조립체를 수용하기 위한 개구부를 가지며 상기 제2 전극 탭과 전기적으로 연결되는 전지 캔;상기 전지 캔의 개구부를 커버하며 상기 제1 전극 탭과 전기적으로 연결되는 탑 캡;상기 전지 캔과 상기 탑 캡 사이에 구비된 가스켓;상기 전지 캔과 전기적으로 연결되며 상기 개구부의 둘레부의 적어도 일부에 접하는 전도성 와셔;상기 탑 캡과 상기 전도성 와셔 사이에 구비되며 상기 탑 캡과 상기 전도성 와셔를 전기적으로 절연하는 절연 와셔; 및상기 전도성 와셔와 상기 절연 와셔 사이에 구비된 고정 부재를 포함하는 이차전지.
- 청구항 1에 있어서, 상기 고정 부재는 상기 전도성 와셔 및 상기 절연 와셔와 대향하는 두 개의 면이 각각 직접 접하는 것인 이차전지.
- 청구항 1에 있어서, 상기 고정 부재는 경화제인 것인 이차전지.
- 청구항 3에 있어서, 상기 경화제는 UV 레진을 포함하는 것인 이차전지.
- 청구항 3에 있어서, 상기 경화제는 상기 전도성 와셔 및 상기 절연 와셔가 접하는 면적의 10% 이상으로 구비되는 것인 이차전지.
- 청구항 1에 있어서, 상기 전지 캔은 원통형인 것인 이차전지.
- 청구항 1에 있어서, 상기 이차전지는 상기 전지 캔의 개구부의 둘레부에 크림핑부를 구비하고, 상기 전도성 와셔는 상기 크림핑부의 상에 접하는 것인 이차전지.
- 청구항 7에 있어서, 상기 전도성 와셔의 폭은 상기 크림핑부의 상면이 갖는 폭보다 더 큰 것인 이차전지.
- 청구항 7에 있어서, 상기 전도성 와셔와 접하는 부분에서의 크림핑부의 두께 및 상기 크림핑부에 접하는 전도성 와셔의 두께의 합은 상기 크림핑부에 접하지 않는 전도성 와셔의 두께의 90% 내지 200%인 것인 이차전지.
- 청구항 1에 있어서, 상기 탑 캡은 상기 전지 캔의 외측 방향으로 돌출 형성된 돌출부를 포함하는 것인 이차전지.
- 청구항 10에 있어서, 상기 돌출부는 상기 전도성 와셔의 중심부에 형성되는 홀을 통해 노출되는 것인 이차전지.
- 청구항 1에 있어서, 상기 절연 와셔는 상기 전도성 와셔의 중심부에 형성된 홀의 내측면을 커버하는 것인 이차전지.
- 청구항 1에 있어서, 상기 절연 와셔는 상기 전도성 와셔의 상면의 전체 면적 중 1% 이상이고, 10% 이하의 면적을 커버하도록 연장되는 것인 이차전지.
- 청구항 7에 있어서, 상기 전지 캔은 상기 크림핑부의 상면에 구비된 삽입 홈을 포함하는 것인 이차전지.
- 청구항 14에 있어서, 상기 전도성 와셔는 상기 삽입 홈과 대응되는 형상을 가지며 상기 삽입 홈과 결합되는 삽입 돌기를 포함하는 것인 이차전지.
- 청구항 1에 있어서, 상기 전지 캔은 하면에 형성된 벤팅부를 포함하는 것인 이차전지.
- 청구항 1에 있어서, 상기 제1 전극 탭은 상기 전극 조립체를 구성하는 제1 전극 집전체 중 제1 전극 활물질이 형성되지 않은 무지부이고, 상기 제2 전극 탭은, 상기 전극 조립체를 구성하는 제2 전극 집전체 중 제2 전극 활물질이 형성되지 않은 무지부인 것인 이차전지.
- 청구항 1에 있어서, 상기 제1 전극 탭 및 제2 전극 탭은 상기 전극 조립체의 권취 중심을 향해 절곡된 것인 이차전지.
- 청구항 1에 있어서, 상기 절연 와셔는 열 융착에 의해 상기 탑 캡과 결합되는 것인 이차전지.
- 제1 전극 탭 및 제2 전극 탭을 구비하는 전극 조립체를 상기 전극 조립체를 수용하기 위한 개구부를 가지며 상기 제2 전극 탭과 전기적으로 연결되는 전지 캔에 수용하는 단계;상기 전지 캔의 개구부에서 상기 제1 전극 탭과 전기적으로 연결되는 탑 캡, 상기 전지 캔과 상기 탑 캡 사이에 구비된 가스켓, 상기 전지 캔과 전기적으로 연결되며 상기 개구부의 둘레부의 적어도 일부에 접하는 전도성 와셔 및 상기 탑 캡과 전도성 와셔 사이에 구비되며 상기 탑 캡과 상기 전도성 와셔를 전기적으로 절연하는 절연 와셔를 결합하여 상기 전지 캔의 개구부를 커버하는 단계; 및상기 전도성 와셔와 상기 절연 와셔 사이에 경화제를 주입하는 단계를 포함하는 청구항 1 내지 19 중 어느 한 항에 따른 이차전지의 제조방법.
- 제1 전극 탭 및 제2 전극 탭을 구비하는 전극 조립체를 상기 전극 조립체를 수용하기 위한 개구부를 가지며 상기 제2 전극 탭과 전기적으로 연결되는 전지 캔에 수용하는 단계;상기 전지 캔의 개구부에서 상기 제1 전극 탭과 전기적으로 연결되는 탑 캡, 상기 전지 캔과 상기 탑 캡 사이에 구비된 가스켓, 상기 탑 캡의 외주면에 구비된 절연 와셔를 결합하여 상기 전지 캔의 개구부를 커버하는 단계;상기 절연 와셔 상에 경화제를 주입하는 단계; 및상기 경화제 상에 상기 전지 캔과 전기적으로 연결되며 상기 개구부의 둘레부의 적어도 일부에 접하는 전도성 와셔를 결합하는 단계를 포함하는 청구항 1 내지 19 중 어느 한 항에 따른 이차전지의 제조방법.
- 청구항 1 내지 19 중 어느 한 항에 따른 이차전지; 및 상기 이차전지를 수용하는 팩 하우징을 포함하는 배터리 팩.
- 청구항 22에 따른 배터리 팩을 포함하는 자동차.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN202280011592.XA CN116745988A (zh) | 2021-02-23 | 2022-02-23 | 二次电池、二次电池制造方法、电池组以及车辆 |
US18/270,432 US20230395956A1 (en) | 2021-02-23 | 2022-02-23 | Secondary battery, secondary battery manufacturing method, battery pack and vehicle |
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WO2024143253A1 (ja) * | 2022-12-26 | 2024-07-04 | パナソニックエナジー株式会社 | 円筒形電池 |
WO2024190287A1 (ja) * | 2023-03-10 | 2024-09-19 | パナソニックエナジー株式会社 | 円筒形電池 |
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WO2023286563A1 (ja) * | 2021-07-14 | 2023-01-19 | 三洋電機株式会社 | 円筒形電池 |
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- 2022-02-23 CN CN202280011592.XA patent/CN116745988A/zh active Pending
- 2022-02-23 WO PCT/KR2022/002676 patent/WO2022182143A1/ko active Application Filing
- 2022-02-23 EP EP22760059.0A patent/EP4300703A1/en active Pending
- 2022-02-23 US US18/270,432 patent/US20230395956A1/en active Pending
- 2022-02-23 CN CN202220372330.3U patent/CN218827500U/zh active Active
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KR20220120519A (ko) | 2022-08-30 |
US20230395956A1 (en) | 2023-12-07 |
EP4300703A1 (en) | 2024-01-03 |
CN116745988A (zh) | 2023-09-12 |
CN218827500U (zh) | 2023-04-07 |
JP2024502572A (ja) | 2024-01-22 |
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