Secondary battery, secondary battery manufacturing device and manufacturing method

Abstract

A secondary battery according to various embodiments of the present disclosure includes: a battery can housing an electrode assembly and having a terminal hole formed on one side; an electronic movement unit disposed inside the battery can, at least a portion of the electronic movement unit protruding to the outside of the battery can through the terminal hole; and an insulating unit inserted between the electronic movement unit and the battery can.

Description

Technical Field

[0001] This disclosure relates to a secondary battery, a secondary battery manufacturing apparatus, and a manufacturing method. Background Technology

[0002] Various types of secondary batteries are used as energy sources for electric vehicles or electromechanical devices. In secondary batteries, electrode assemblies are either jelly-rolled, where the negative electrode plate, positive electrode plate, and separator are wound together, or stacked in a suitable order.

[0003] This electrode assembly is housed inside the battery casing to connect to the negative and positive terminals, and the interior of the casing is sealed while filled with electrolyte. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This disclosure relates to a secondary battery, a secondary battery manufacturing apparatus, and a manufacturing method that facilitates the management of foreign matter inside the secondary battery.

[0006] (II) Technical Solution

[0007] A secondary battery according to various embodiments of the present disclosure may include: a battery can housing an electrode assembly and having a terminal hole formed on one side; an electronic movement unit disposed inside the battery can, at least a portion of the electronic movement unit protruding to the outside of the battery can through the terminal hole; and an insulating unit inserted between the electronic movement unit and the battery can.

[0008] In an exemplary embodiment, the electronic moving unit may include: a bottom portion connected to the electrode assembly inside the battery canister; and a column portion extending axially upward from the bottom portion.

[0009] In an exemplary embodiment, the column portion may include: a column body integrally formed with the bottom, at least a portion of the column body being disposed inside the terminal hole; and a column arm bent radially outward from the column body.

[0010] In an exemplary embodiment, the bottom may be combined with an uncoated portion of the electrode assembly.

[0011] In an exemplary embodiment, the bottom is disposed parallel to the upper wall of the battery can where the terminal hole is formed, thereby restricting axial movement of the column portion.

[0012] In an exemplary embodiment, the insulating unit may include: a body portion disposed between the bottom and the upper wall of the battery can having the terminal hole formed thereon; and a neck portion extending axially upward from the body portion and disposed in close contact with the column portion.

[0013] In an exemplary embodiment, the neck may include: a first portion extending from the body portion and abutting the inner peripheral surface of the terminal hole; and a second portion extending radially outward from the first portion.

[0014] In an exemplary embodiment, the main body, the first portion, and the second portion may be integrally formed to enclose at least a portion of the upper wall.

[0015] In an exemplary embodiment, the column, the neck, and the terminal hole may be coaxially arranged with the central axis of the battery can.

[0016] In an exemplary embodiment, the insulating unit may include a leg that extends axially downward along the outer edge of the body portion.

[0017] In an exemplary embodiment, the leg may be disposed between the electrode assembly and the side wall of the battery can.

[0018] In an exemplary embodiment, the insulating unit may include a placement space defined by a lower space of the main body and a radially inner space of the leg, and the bottom may be disposed in the placement space.

[0019] A secondary battery manufacturing apparatus according to various embodiments of the present disclosure may include: a first mold that provides axially downward pressure to an electronic moving unit disposed inside a battery can, the electronic moving unit passing through a terminal hole in the battery can and protruding to the outside; and a second mold, at least a portion of which is disposed inside the battery can to support the electronic moving unit.

[0020] In an exemplary embodiment, the second mold may be configured to be axially movable in a central space formed at the winding center of the electrode assembly.

[0021] In an exemplary embodiment, the electronic moving unit may include: a bottom portion, located above the electrode assembly and positioned corresponding to an uncoated portion of the electrode assembly; and a pillar portion, located above the electrode assembly and positioned corresponding to a central space of the electrode assembly, wherein the second mold may be configured to support the pillar portion in the central space.

[0022] In an exemplary embodiment, the second mold may support the electronic movement unit at a position at the same height or higher than the height of the uncoated portion of the electrode protruding to the upper side of the electrode assembly.

[0023] A method for manufacturing a secondary battery according to various embodiments of the present disclosure may include: an external bonding step, bonding an electronic moving unit and an electrode assembly, wherein the column portion and the bottom of the electronic moving unit are integrally formed; an internal bonding step, bonding the electronic moving unit and an insulating unit inside a battery can; and a riveting step, pressurizing at least a portion of the electronic moving unit outside the battery can, wherein in the riveting step, pressure may be applied to the column portion, wherein the column portion protrudes to the outside of the battery can through a terminal hole formed in the upper wall of the battery can in the internal bonding step.

[0024] In an exemplary embodiment, the insulating unit may include: a body portion disposed between the bottom and the upper wall; and a neck portion extending from the body portion through the terminal hole to enclose the post portion, wherein, during the riveting step, the upper end of the neck portion may be bent together with at least a portion of the post portion by the applied pressure.

[0025] In an exemplary embodiment, during the riveting step, the applied pressure can be provided by a first mold disposed outside the battery can, and the electronic moving unit can be supported by a second mold disposed inside the battery can for the applied pressure.

[0026] (III) Beneficial Effects

[0027] According to various embodiments of this disclosure, by omitting the joining process between components inside the battery can, it is possible to easily manage foreign objects inside the battery can.

[0028] In addition, according to an exemplary embodiment, the number of components can be reduced by integrally forming the electronic movement unit.

[0029] Additionally, according to an exemplary embodiment, by integrally forming the insulating unit, the battery can be prevented from penetrating between the neck and the body, thereby improving insulation.

[0030] In addition, according to an exemplary embodiment, the assembly process inside the battery can is performed by inserting and combining electronic moving units and insulating units, thereby making the assembly process more efficient.

[0031] In addition, according to an exemplary embodiment, by performing a riveting process on the column part of the electronic moving unit outside the battery canister, the deformation of the column arm can be easily identified, thereby reducing the defect rate. Attached Figure Description

[0032] Figure 1 This is a schematic partial cross-sectional view of a portion of the upper part of a secondary battery according to an exemplary embodiment of the present disclosure.

[0033] Figure 2 This is a schematic cross-sectional view of an electronic mobile unit according to an exemplary embodiment of the present disclosure.

[0034] Figure 3 This is a schematic cross-sectional view of an insulating unit according to an exemplary embodiment of the present disclosure.

[0035] Figure 4 This is a schematic diagram illustrating the process of placing an integrally formed electronic mobile unit onto an electrode assembly in an exemplary embodiment of this disclosure.

[0036] Figure 5 This is a schematic diagram illustrating the state in which the bottom of the electronic moving unit is engaged with the positive terminal of the electrode assembly in an exemplary embodiment of this disclosure.

[0037] Figure 6 This is a diagram schematically illustrating the process of combining the battery canister, electronic movement unit, and insulation unit in an exemplary embodiment of this disclosure.

[0038] Figure 7 This is a diagram schematically illustrating a riveting process according to an exemplary embodiment of the present disclosure.

[0039] Figure 8 This is a flowchart of a secondary battery manufacturing method according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0040] The embodiments disclosed herein are provided to illustrate the present disclosure more fully to those skilled in the art, and the following embodiments may be modified into various other forms; the scope of the present disclosure is not limited to the following embodiments.

[0041] Hereinafter, for ease of explanation, some embodiments of the present disclosure will be described with reference to exemplary drawings. When referring to components in the various figures, the same reference numerals will be used as much as possible, even if the same component is represented in different figures.

[0042] The terms or words used in this specification and claims should not be construed as limited to their general or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical ideas of this disclosure, based on the principle that the inventor can appropriately define the concepts of the terms in order to best describe his invention.

[0043] The terminology used in this specification is for describing specific embodiments and is not intended to limit this disclosure. As used in this specification, the singular form may include the plural form unless the context clearly indicates otherwise.

[0044] Furthermore, when used to describe and claim the contents of this disclosure, expressions such as “comprise,” “consist of,” and “have” should be interpreted in a non-exclusive manner, meaning that the component can be built in, unless specifically stated otherwise, and therefore should be interpreted as including other components rather than excluding other components.

[0045] Furthermore, when describing the components of embodiments of this disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish a component from other components, and the nature, order, or sequence of the components are not limited by these terms.

[0046] When a component is described as being "connected" or "combined" to other components, the component can be directly connected or combined to other components. However, it should be understood that the component can also be "connected" or "combined" with another component.

[0047] Spatial terms such as “beneath,” “below,” “lower,” “above,” and “upper” are used to readily understand one factor or feature shown in the accompanying drawings and other factors or features. Such spatial terms are intended to facilitate understanding of this disclosure according to its various states of manufacture or use, and not to limit it. For example, if a factor or feature in the drawings is reversed, a factor or feature described as “below” or “below” will become “above” or “upper.” Therefore, “below” is a concept that includes “above” or “below.”

[0048] The embodiments and configurations shown in the accompanying drawings described in this specification are merely the most preferred embodiments of this disclosure and do not represent all the technical ideas of this disclosure. Therefore, it should be understood that various equivalents and variations may exist at the time of filing this application. Furthermore, detailed descriptions of known functions and configurations that may obscure the essence of this disclosure will be omitted.

[0049] Hereinafter, various embodiments of secondary batteries according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0050] The secondary battery described in this disclosure can be any type of conventional battery that converts the chemical energy of the material stored in the battery into electrical energy and is capable of being charged / discharged multiple times.

[0051] In describing the various embodiments of this disclosure, axial direction may mean the central axis C of the battery can 100 (e.g., Figure 1 The direction of extension, radial, can mean the direction close to or far from the central axis. Additionally, since the core-shaped electrode assembly 200 is coaxially arranged relative to the battery canister 100, the axial direction can also mean the direction parallel to the central axis on which the electrode assembly 200 is wound.

[0052] Figure 1 This is a schematic partial cross-sectional view of a portion of the upper part of a secondary battery according to an exemplary embodiment of the present disclosure. Figure 2 This is a schematic cross-sectional view of an electronic moving unit 300 according to an exemplary embodiment of the present disclosure. Figure 3 This is a schematic cross-sectional view of an insulating unit 400 according to an exemplary embodiment of the present disclosure.

[0053] Reference Figures 1 to 3 The secondary battery according to various embodiments of the present disclosure may include an electrode assembly 200, a battery canister 100, an electronic movement unit 300, and an insulation unit 400.

[0054] In exemplary embodiments, the secondary battery disclosed herein may include a cylindrical secondary battery, but its form is not limited thereto.

[0055] For example, the secondary battery is cylindrical and may include: a battery canister 100, one side of which has a terminal hole 111; an electronic movement unit 300 disposed inside the battery canister 100, at least a portion of which protrudes outside the battery canister 100 through the terminal hole 111; and an insulating unit 400 inserted between the electronic movement unit 300 and the battery canister 100.

[0056] Additionally, the secondary battery may further include a current collector (not shown) and a cover assembly (not shown).

[0057] First, the electrode assembly 200 may include a positive electrode 220, a negative electrode 230, and a separator 240. The positive electrode 220 and the negative electrode 230 may each include a current collector (not shown) and a coating layer on which an active material is coated.

[0058] The positive electrode 220 may include a positive electrode current collector in the form of a metal foil and a positive electrode coating layer 221 on which a positive electrode active material is coated. For example, the positive electrode current collector may contain aluminum.

[0059] The positive electrode coating layer 221 can be a conductive coating and can contain a positive electrode active material. For example, the positive electrode active material can contain lithium nickel manganese cobalt oxide (NMC), lithium manganese oxide (LMO), lithium iron phosphate (LFP), lithium cobalt oxide (LCO), lithium titanate (LTO), or chalcogenides (LiTiS2), but is not limited thereto, and any positive electrode active material known to those skilled in the art can be used.

[0060] The positive electrode current collector may include an uncoated portion 222 of the positive electrode where the positive electrode coating layer 221 is not formed. For example, the uncoated portion 222 of the positive electrode may function as a positive electrode tab.

[0061] The uncoated portion 222 of the positive electrode may be exposed on one axial side of the electrode assembly 200. For example, the uncoated portion 222 of the positive electrode may be provided on the upper axial side of the electrode assembly 200. For example, the uncoated portion 222 of the positive electrode may protrude from the electrode assembly 200 in the direction opposite to that of the cover plate.

[0062] The uncoated positive electrode portion 222 can be electrically connected to the electronic movement unit 300 described later. For example, the uncoated positive electrode portion 222 can be connected to the bottom 320 of the electronic movement unit 300.

[0063] In an exemplary embodiment, the negative electrode 230 may include a negative electrode current collector (not shown) in the form of a metal foil and a negative electrode coating layer 231 on which a negative electrode active material is coated. For example, the negative electrode current collector may contain copper or nickel.

[0064] In an exemplary embodiment, the negative electrode coating layer 231 may be a conductive coating and may contain a negative electrode active material. For example, the negative electrode active material may contain silicon materials (e.g., metallic silicon and silicon dioxide), carbon-based materials (e.g., graphite materials, graphene-containing materials, hard carbon, soft carbon, carbon nanotubes, porous carbon, conductive carbon), tin-based materials, or metal oxides, but is not limited thereto; any negative electrode active material known to those skilled in the art may also be used.

[0065] The negative electrode current collector may include an uncoated portion of the negative electrode (not shown) where the negative electrode coating layer 231 is not formed. For example, the uncoated portion of the negative electrode may function as a negative electrode tab.

[0066] The uncoated negative electrode portion may be exposed on the opposite axial side of the electrode assembly 200. For example, the uncoated negative electrode portion may be located on the axial lower side of the electrode assembly 200. For example, the uncoated negative electrode portion may protrude from the electrode assembly 200 toward the cover plate.

[0067] For example, the uncoated portion of the negative electrode can be electrically connected to the current collector. The uncoated portion of the negative electrode can be electrically connected to the battery canister 100 via the current collector.

[0068] For example, the uncoated portion of the negative electrode can be electrically connected to the cover plate described later. For example, the uncoated portion of the negative electrode can be joined to the cover plate by methods such as laser welding. In this disclosure, by directly joining the uncoated portion of the negative electrode to the cover plate, the internal volume of the battery can 100 can be increased, thereby further increasing the energy density.

[0069] A diaphragm 240 is inserted between the positive electrode 220 and the negative electrode 230, thereby preventing the positive electrode 220 and the negative electrode 230 from being electrically connected and short-circuited. For example, the diaphragm 240 may contain an electrically insulating material. For example, the diaphragm 240 may contain a polymeric material. For example, the diaphragm 240 may contain polyethylene, polypropylene, or combinations thereof, but is not limited thereto.

[0070] In this disclosure, there may be a tabless structure in which the uncoated portions of the positive electrode 220 and the negative electrode 230 perform the function of electrode tabs without the need for separate electrode tabs, but it is obvious that a structure in which separate electrode tabs are connected from the positive electrode 220 and the negative electrode 230 may also be applied.

[0071] In an exemplary embodiment, the battery can 100 may be configured as a cylinder. A receiving space for accommodating the electrode assembly 200 may be formed inside the battery can 100. An outwardly opening may be formed at at least one axial end of the battery can 100 to allow insertion of the electrode assembly 200. Here, the lower end opening of the battery can 100 is exemplarily described, but the reverse is also apparent.

[0072] The battery canister 100 may contain a conductive metallic material. The battery canister 100 may be electrically connected to either the positive terminal 220 or the negative terminal 230. For example, the battery canister 100 may be electrically connected to the negative terminal 230, thus having the same polarity as the negative terminal 230.

[0073] The battery canister 100 can also be configured to be electrically insulated from either the positive terminal 220 or the negative terminal 230. For example, when the negative terminal 230 is electrically connected to the battery canister 100, the positive terminal 200 is electrically insulated from the battery canister 100, thereby preventing the positive terminal 220 and the negative terminal 230 from being directly connected.

[0074] The battery canister 100 may include an upper wall 110 and a side wall 120 extending downward along the outer edge of the upper wall 110. For example, an opening may be formed in the lower part of the side wall 120. For example, the upper wall 110 and the side wall 120 may be integrally formed, but are not limited thereto.

[0075] In an exemplary embodiment, the upper wall 110 of the battery can 100 may be configured as a circular plate shape. The upper wall 110 may form the upper end of the battery can 100. Side walls 120 extending downward along the outer edge may be provided at the edge of the upper wall 110. Through the upper wall 110 and the side walls 120 of the battery can 100, a receiving space for inserting the electrode assembly 200 can be formed on the inner side.

[0076] At least a portion of the electronic moving unit 300 and the insulating unit 400 can be disposed through the upper wall 110.

[0077] In an exemplary embodiment, the bottom 320 of the electronic moving unit 300 may be provided below the upper wall 110. In addition, by inserting the main body 420 of the insulating unit 400 between the upper wall 110 and the bottom 320, contact between the upper wall 110 and the bottom 320 can be prevented.

[0078] A terminal hole 111 through which the electronic moving unit 300 (described later) passes can be provided on the upper wall 110 of the battery canister 100. For example, the terminal hole 111 can be formed by extending vertically along one side of the upper wall 110. For example, the terminal hole 111 can be provided in the central part of the upper wall 110, but it is not limited thereto, and it can also be formed at any position of the upper wall 110 through which the electronic moving unit 300 can pass.

[0079] At least a portion of the electronic movement unit 300 and the insulating unit 400 can be exposed to the outside of the battery canister 100 through the terminal hole 111 of the upper wall 110. For example, the upper wall 110 can be electrically insulated from the positive electrode 220 of the electrode assembly 200.

[0080] For example, the terminal hole 111 can be circular, but is not limited to this. The diameter of the terminal hole 111 can be formed to be larger than the diameter of the post portion 310. The diameter of the terminal hole 111 can be formed to be the same as the outer diameter of the neck 410.

[0081] The terminal hole 111 of the upper wall 110 can be configured such that the post portion 310 of the electronic moving unit 300 and the neck 410 of the insulating unit 400 pass through the receiving space inside the battery can 100 to the outside through the terminal hole 111. The inner peripheral surface of the terminal hole 111 can be in close contact with the neck 410 of the insulating unit 400. The terminal hole 111 can be fixedly engaged with the electronic moving unit 300 and the insulating unit 400 while being passed through by the post portion 310 and the neck 410.

[0082] The electronic moving unit 300 and the insulating unit 400 are connected to the battery can 100 through the terminal hole 111 of the upper wall 110, thereby sealing the battery can 100.

[0083] The side wall 120 of the battery can 100 may extend axially downward along the periphery of the edge of the upper wall 110 of the battery can 100. A receiving space for accommodating the electrode assembly 200 may be formed inside the side wall 120. The upper wall 110 may be formed at the upper end of the side wall 120.

[0084] The sidewall 120 may be electrically insulated from the electrode assembly 200 housed in the receiving space. For example, the sidewall 120 may be insulated from the positive uncoated portion 222 protruding axially upward from the electrode assembly 200. In this disclosure, the battery can 100 may have a structure electrically connected to the negative uncoated portion, and the positive uncoated portion 222 may be insulated from the battery can 100 to prevent short circuits.

[0085] For example, the inner peripheral surface of the sidewall 120 may be configured to be spaced apart from the electrode assembly 200 by a predetermined interval. For example, the inner peripheral surface of the sidewall 120 may be configured to be spaced apart from the positive electrode uncoated portion 222 protruding upward from the electrode assembly 200.

[0086] A main body portion 420 of the insulating unit 400 may be provided between the side wall 120 and the electrode assembly 200. For example, a vertical portion of the main body portion 420 may be provided between the side wall 120 and the electrode assembly 200. For example, the vertical portion of the main body portion 420 may be provided in at least a portion of the area between the side wall 120 and the electrode assembly 200. For example, the vertical portion may be configured to cover a portion of the upper end of the side wall 120 adjacent to the upper wall 110. The side wall 120 and the electrode assembly 200 may be electrically insulated from each other by the vertical portion.

[0087] An opening that opens outwards can be formed at the lower end of the sidewall 120. Through the opening formed at the lower end of the sidewall 120, the electrode assembly 200 and the electrolyte can be inserted into the receiving space.

[0088] The negative electrode 230 of the electrode assembly 200 can be coupled to a current collector. The current collector can be electrically connected to the uncoated portion of the negative electrode. For example, the current collector can be coupled to the uncoated portion of the negative electrode by laser welding, but is not limited thereto.

[0089] For example, the current collector can be configured to correspond to the shape of the lower end of the electrode assembly 200. For example, the current collector may include: an electrode connection portion formed at a position corresponding to the uncoated positive electrode portion 222 and electrically connected to the uncoated positive electrode portion 222; and a can connection portion extending from the edge of the electrode connection portion and connected to the battery can 100.

[0090] The electrode connection portion can be configured to cover at least a portion of the uncoated portion 222 of the positive electrode. For example, the electrode connection portion can be configured in a circular plate shape. For example, the electrode connection portion can include at least one hole to reduce weight and facilitate smooth gas discharge. However, this is just an example, and the electrode connection portion can be configured in various shapes as needed.

[0091] The can connection portion can extend from the outer edge of the electrode connection portion. The can connection portion is used to connect the electrode connection portion and the battery can 100, and can be connected to one side of the inner circumferential surface of the battery can 100.

[0092] For example, the can connection part can be connected to one side of the beading part of the battery can 100, but is not limited thereto. The can connection part can be connected to one side of the inner circumferential surface of the battery can 100, or the can connection part can be connected to one side of the cover assembly.

[0093] The cover assembly can be attached to the opening formed at the lower end of the sidewall 120 while the electrode assembly 200 and electrolyte are inserted. The opening of the sidewall 120 can be sealed by the cover assembly.

[0094] For example, the cover assembly may include a cover plate and a sealing gasket. The cover plate may be electrically insulated from the battery canister 100 by the sealing gasket.

[0095] The cover can be configured to correspond to the shape of the opening of the battery canister 100. For example, the cover can be configured to be a circular plate shape. For example, the cover can function as a negative terminal 230 that is electrically connected to the uncoated negative terminal portion of the electrode assembly 200. However, it is not limited to this; the cover can also be configured to be electrically insulated from the electrode assembly 200.

[0096] In an exemplary embodiment, the cover may include at least one negative electrode 230 terminal portion (not shown). The negative electrode 230 terminal portion may be configured to project axially downward from one side of the cover. For example, the negative electrode 230 terminal portion may be coaxially arranged on the cover with the central axis of the battery canister 100, but is not limited thereto. The secondary battery of this disclosure can be easily contacted with an external structure (e.g., a busbar (not shown)) through the negative electrode 230 terminal portion, and can provide a path for electron movement.

[0097] In an exemplary embodiment, at least one notch (not shown) may be provided on one side of the cover to facilitate rupture when the internal pressure of the battery can 100 increases. For example, the notch may be configured as a groove formed at a predetermined depth on at least one of the upper and lower surfaces of the cover. For example, the notch may be formed at the negative electrode 230 terminal portion, but is not limited thereto.

[0098] For example, a rolled edge recessed radially inward may be formed in a portion of the lower end of the sidewall 120 that forms the opening, and a cover plate may be disposed on the rolled edge.

[0099] With the cover plate in the rolled edge position, the lower end of the side wall 120 bends and wraps around the edge of the cover plate to form a crimping part, thereby sealing the battery canister 100.

[0100] For example, a sealing gasket can be provided between the edge of the cover and the battery canister 100. The sealing gasket can be formed of an elastic material. The sealing gasket can be formed of an insulating material.

[0101] During the process of forming the crimped portion of the battery can 100, the sealing gasket is compressed, which can further improve the sealing force.

[0102] However, the bonding structure of the cover assembly is not limited to this. The rolled edge in the side wall 120 can be omitted, and the cover assembly can also be bonded to the battery canister 100 by a crimping part without the rolled edge.

[0103] Alternatively, the cap assembly may omit the rolled edge or crimped portion and be joined to the battery canister 100 by means of laser welding or other methods. In this case, the sealing gasket may also be omitted.

[0104] For example, the cover assembly can be electrically connected to the battery can 100. However, it is not limited to this; the cover assembly can also be electrically insulated from the battery can 100.

[0105] Next, the upper structure of the secondary battery will be explained in detail.

[0106] In an exemplary embodiment, an electronic movement unit 300 and an insulating unit 400 may be disposed on the upper part of the electrode assembly 200.

[0107] The secondary battery may include an electron movement unit 300. The electron movement unit 300 may be connected to the positive terminal 220, thereby providing a path for electron movement during charging and / or discharging of the secondary battery.

[0108] The electronic movement unit 300 may contain a conductive material. For example, the electronic movement unit 300 may contain a metallic material. For example, the electronic movement unit 300 may contain aluminum, nickel, or alloys thereof.

[0109] The electronic movement unit 300 can be configured to be electrically insulated from the battery canister 100. For example, the electronic movement unit 300 can be electrically insulated from the battery canister 100 via an insulating unit 400. The electronic movement unit 300 can be configured to be spaced apart from the upper wall 110 and the side wall 120 of the battery canister 100, respectively.

[0110] At least a portion of the electronic mobile unit 300 may be disposed inside the battery canister 100, and the remaining portion may be disposed outside the battery canister 100.

[0111] In an exemplary embodiment, the electronic movement unit 300 may include a column portion 310 and a bottom portion 320. For example, the electronic movement unit 300 may include: a bottom portion 320 connected to the electrode assembly 200 inside the battery canister 100; and a column portion 310 extending axially upward from the bottom portion 320.

[0112] The column portion 310 and the bottom portion 320 of the electronic moving unit 300 can be integrally formed. In this disclosure, since the bottom portion 320 and the column portion 310 of the electronic moving unit 300 are integrally formed, it is not necessary to separately join the bottom portion 320 and the column portion 310 inside the battery canister 100.

[0113] The electronic moving unit 300 can be configured such that, with the bottom 320 located inside the housing space of the battery can 100, the column portion 310 passes through the terminal hole 111 of the upper wall 110 from the housing space of the battery can 100.

[0114] The column portion 310 can extend axially upward from one side of the bottom 320. The column portion 310 can be integrally formed with the bottom 320. The column portion 310 can be disposed on the upper part of the electrode assembly 200 at a position corresponding to the central space 210 of the electrode assembly 200.

[0115] The column portion 310 can be configured in a column shape. For example, the column portion 310 can be configured as a cylinder with a circular cross-section, but is not limited thereto. The diameter of the column portion 310 can be formed to be smaller than the diameter of the terminal hole 111 of the upper wall 110 of the battery can 100. The cross-sectional area of ​​the column portion 310 can be formed to be smaller than the area of ​​the terminal hole 111. The diameter of the column portion 310 can be formed to be smaller than the diameter of the bottom 320 described later.

[0116] With the bottom 320 attached to the electrode assembly 200, the column 310 can be led out from the internal receiving space of the battery can 100 through the terminal hole 111 of the upper wall 110 to the upper side of the upper wall 110.

[0117] That is, in the manufacturing process of the secondary battery disclosed herein, the terminal hole 111 is inserted from the bottom of the upper wall 110, and the diameter of the column portion 310 is formed to be smaller than the diameter of the terminal hole 111, so it can pass through the terminal hole 111. However, the diameter of the bottom portion 320 is formed to be larger than the terminal hole 111, so the upward movement of the column portion 310 can be restricted since the bottom portion 320 cannot pass through the terminal hole 111.

[0118] Through this manufacturing process, a portion of the upper part of the pillar 310 can protrude to the outside of the battery can 100 through the terminal hole 111 of the upper wall 110 of the battery can 100. For example, a portion of the lower part of the pillar 310 can be connected to the bottom 320 and disposed inside the battery can 100, while at least a portion of the upper part can be disposed outside the battery can 100.

[0119] At least a portion of the post 310 is disposed outside the battery canister 100, thereby enabling electrical connection to an external structure. For example, the post 310 may function as a positive terminal 220.

[0120] In an exemplary embodiment, at least a portion of the upper part of the column 310 may be configured in a rivet shape. Typically, the electrode terminals of a secondary battery configured in a rivet shape are inserted into the receiving space from the outside of the battery can 100 and then welded to the current collector or electrode assembly 200 inside the battery can 100. In this case, since the electrode terminals are inserted from the outside in, the operator can confirm the insertion process, making insertion easy. However, since the welding process between the electrode terminals and the electrode assembly 200 needs to be performed inside the battery can 100, there is a problem that foreign matter such as fumes or dust generated during the welding process may remain inside the battery can 100.

[0121] Therefore, this disclosure proposes a structure in which the post portion 310, which functions as a positive terminal 220, is led out from the inside of the battery can 100. In this disclosure, since a bottom 320 with a diameter larger than that of the terminal hole 111 is provided at the lower end of the post portion 310, over-leading of the post portion 310 can be prevented by limiting the upward movement of the post portion 310, thereby allowing the post portion 310 to be easily led out.

[0122] Furthermore, since the column portion 310 and the bottom portion 320 are integrally formed, a separate welding process is not required. In particular, even though both the column portion 310 and the bottom portion 320 are located inside the battery canister 100, it is possible to prevent the generation of foreign objects inside the battery canister 100 due to the welding process.

[0123] For example, the column portion 310 may include: a column body 311 integrally formed with the bottom portion 320 and at least a portion disposed inside the terminal hole 111; and a column arm 312 bent radially outward from the column body 311.

[0124] The pillar body 311 is integrally formed with the bottom 320 and can extend upward from the bottom 320. The pillar body 311 can be formed to be smaller than the diameter of the terminal hole 111. The diameter of the pillar body 311 can be formed to be at least the same as the inner diameter of the neck 410 of the insulating unit 400 described later.

[0125] The column body 311 can be configured in the shape of a column. For example, the column body 311 can be configured in the shape of a cylinder, but is not limited to this.

[0126] At least a portion of the lower end of the column body 311 can be integrally connected to the bottom 320 and disposed inside the battery can 100, while at least a portion of the upper end can be disposed outside the battery can 100 while passing through the terminal hole 111.

[0127] The neck 410 of the insulating unit 400 can be provided close to the outer periphery of the column body 311. For example, the column body 311 can be led out to the outside of the battery can 100 through the terminal hole 111 while being wrapped by the neck 410 of the insulating unit 400.

[0128] A column arm 312 may be provided on the upper part of the column body 311. The column arm 312 is formed on the upper part of the column body 311, and at least a portion of the column arm 312 is disposed on the outside of the battery can 100, so that its shape can be changed by external force.

[0129] Here, the process of joining the upper wall 110 of the battery can 100 by deforming the shape of the column arm 312 can be described as a riveting process or a caulking process. The riveting process or caulking process can be applied in any known manner, so detailed descriptions will be omitted here.

[0130] For example, before the riveting process, such as Figure 2 As shown, the column arm 312 can be prepared to extend axially upward along the periphery of the column body 311. For example, the column arm 312 can be configured in a cylindrical shape. For example, the outer diameter of the column arm 312 can be formed to be smaller than the diameter of the terminal hole 111. The neck 410 of the insulating unit 400 can be provided close to the outer periphery of the column arm 312.

[0131] At least a portion of the column arm 312 can pass through a terminal hole 111 formed in the upper wall 110 of the battery can 100, thereby being disposed outside the battery can 100. At least a portion of the upper end of the column arm 312 can be deformed by an external force to engage with the upper wall 110 of the battery can 100.

[0132] For example, the column arm 312 can be joined by a riveting process and by the first mold 810 (e.g., Figure 7 The pressure applied by the column arm 312 causes it to bend radially outward and be fixed to the upper wall 110 of the battery can 100. For example, the column arm 312 can be joined to the upper wall 110 of the battery can 100 using a conventional riveting method. In this case, the neck 410 of the insulating unit 400 can be bent together with the column arm 312 and inserted between the column arm 312 and the upper surface of the upper wall 110.

[0133] A bottom 320 may be integrally formed at the lower end of the column body 311. The bottom 320 may extend radially outward from the lower end of the column body 311.

[0134] The bottom 320 can be configured to correspond to the shape of the upper end face of the electrode assembly 200. For example, the bottom 320 can be configured to be a circular plate shape. The bottom 320 can be formed to be smaller than the diameter of the upper wall 110 of the battery canister 100.

[0135] The bottom 320 can be located below the upper wall 110 inside the battery can 100. The bottom 320 can be arranged parallel to the upper wall 110 of the battery can 100 where the terminal hole 111 is formed.

[0136] For example, the diameter of the bottom 320 can be formed to be larger than the diameter of the terminal hole 111 of the upper wall 110. When the column portion 310 axially passes through the terminal hole 111 and extends outward, the bottom 320 cannot pass through the terminal hole 111, thus restricting the axial movement of the column portion 310.

[0137] The bottom 320 may be configured to cover at least a portion of the upper end surface of the electrode assembly 200. The bottom 320 may be located on one axial side of the electrode assembly 200. The bottom 320 may be located on the upper part of the electrode assembly 200 at a position corresponding to the uncoated portion of the electrode (e.g., the uncoated positive electrode portion 222).

[0138] The bottom portion 320 can be electrically connected to an uncoated portion of the electrode assembly 200. For example, the bottom portion 320 can contact and bond with an uncoated portion of the electrode assembly 200. Here, the uncoated portion of the electrode assembly 200 can be at least one of a positive uncoated portion 222 or a negative uncoated portion. For example, the bottom portion 320 can contact and bond with the positive uncoated portion 222. For example, the bottom portion 320 can be bonded to the positive uncoated portion 222 by laser welding, but is not limited thereto. For example, the bottom portion 320 can also be bonded to the positive uncoated portion 222 by a separate conductive component.

[0139] The bottom 320 can be electrically connected to the uncoated positive electrode portion 222, thereby providing a path for electron movement during charging and / or discharging of the secondary battery.

[0140] In this disclosure, the bonding process between the bottom 320 and the uncoated portion of the positive electrode 220 can be performed outside the battery can 100. Therefore, no foreign matter is generated inside the battery can 100 during the bonding process between the bottom 320 and the uncoated portion of the positive electrode 220.

[0141] The bottom 320 may be configured to be electrically insulated from the battery canister 100. The bottom 320 may be configured to be spaced apart from the side wall 120 of the battery canister 100 by a predetermined distance. For example, the upper surface of the bottom 320 may be spaced apart from the upper wall 110 of the battery canister 100, and the side surface of the bottom 320 may be spaced apart from the side wall 120 of the battery canister 100.

[0142] By inserting the main body 420 of the insulating unit 400 between the bottom 320 and the battery canister 100, direct contact between the bottom 320 and the battery canister 100 can be prevented. For example, the main body 420 of the insulating unit 400 can be provided between the bottom 320 and the upper wall 110 of the battery canister 100, and the leg 430 of the insulating unit 400 can be provided between the bottom 320 and the side wall 120 of the battery canister 100.

[0143] The secondary battery disclosed herein may include an insulating unit 400. The insulating unit 400 may be disposed between the electronic moving unit 300 and the battery canister 100. The insulating unit 400 can electrically insulate the electronic moving unit 300 and the battery canister 100. The insulating unit 400 can improve the sealing force when the electronic moving unit 300 and the battery canister 100 are joined.

[0144] Since the insulating unit 400 of this disclosure performs both sealing and insulating functions, materials with electrical insulation, impact resistance, chemical resistance and elasticity can be used.

[0145] For example, the insulating unit 400 may contain fluororubber, polyimide, polyphenylene sulfide, ethylene tetrafluoroethylene copolymer, polytetrafluoroethylene, polyetheretherketone, polyaryletherketone, etc., but is not limited to these.

[0146] For example, in the insulating unit 400, the neck 410 (described later) and the main body 420 and legs 430 (excluding the neck 410) may be made of different materials.

[0147] For example, the neck 410 of the insulating unit 400 can be made of a material with excellent chemical resistance, airtightness, and heat resistance. For example, the neck 410 can be made of nitrile rubber, ethylene propylene diene monomer (EPDM) rubber, fluororubber, silicone rubber, etc., but is not limited to these.

[0148] For example, the main body 420 and the legs 430 of the insulating unit 400 can be made of materials with excellent electrical insulation, chemical resistance, and heat resistance. For example, the main body 420 and the legs 430 can be made of polypropylene, polyimide, polyphenylene sulfide, polyetheretherketone, etc., but are not limited to these.

[0149] For example, when the neck 410 and the main body 420 and legs 430 other than the neck 410 are made of different materials, the insulating unit 400 can be manufactured by methods such as double injection molding, insert molding, overmolding, etc., but is not limited to these methods.

[0150] The insulating unit 400 disclosed herein may include a main body 420, a neck 410, and a leg 430. For example, the main body 420, neck 410, and leg 430 of the insulating unit 400 may be integrally formed.

[0151] In the insulating unit 400, the main body 420 and the leg 430 may be disposed inside the battery can 100, and at least a portion of the neck 410 may pass through the terminal hole 111 of the upper wall 110 and be disposed outside the battery can 100.

[0152] The insulating unit 400 may include a through hole 440 through which the post portion 310 of the electronic moving unit can pass. Here, the through hole 440 may be described as including a first through hole 441 of the main body portion 420 and a second through hole 442 of the neck portion 410, which will be described later.

[0153] The main body 420 can be disposed inside the battery canister 100 to electrically insulate the electrode assembly 200 from the battery canister 100. The main body 420 can be configured in a shape corresponding to the upper end face of the electrode assembly 200. For example, the main body 420 can be configured in a circular plate shape.

[0154] The main body 420 can be disposed inside the battery can 100 between the upper wall 110 of the battery can 100 and the bottom 320 of the electronic moving unit 300, thereby preventing the bottom 320 from being electrically connected to the upper wall 110.

[0155] The upper surface of the bottom 320 of the electronic moving unit 300 can be disposed facing the lower surface of the main body 420.

[0156] In addition, the main body 420 may be disposed on the upper side of the electrode assembly 200 to prevent the electrode assembly 200 from moving and to buffer the impact that may be transmitted to the electrode assembly 200.

[0157] A first through hole 441 extending vertically through one side of the main body 420 can be formed. For example, the first through hole 441 can be coaxially arranged on the main body 420 with the central axis of the electrode assembly 200. The column portion 310 of the electronic moving unit 300 can be configured to pass through the first through hole 441 of the main body 420 axially from the bottom to the top.

[0158] A neck 410 may be provided on the upper part of the main body 420. The neck 410 extends axially upward from the main body 420 along the outer edge of the first through hole 441, thereby being closely fitted to the column portion 310. The neck 410 may be integrally formed with the main body 420. For example, the neck 410 may be provided in a cylindrical shape with a predetermined diameter. The neck 410 may be inserted between the column portion 310 and the upper wall 110 of the battery canister 100 to electrically insulate the column portion 310 from the battery canister 100.

[0159] A second through hole 442 extending axially can be formed on the inner side of the neck 410. At least a portion of the column portion 310 of the electronic moving unit 300 can be disposed inside the second through hole 442. The column portion 310 can be disposed in close contact with the inner circumferential surface of the neck 410.

[0160] The second through hole 442 of the neck 410 can be configured to communicate with the first through hole 441 of the main body 420. The column portion 310 of the electronic moving unit 300 can pass through the first through hole 441 and the second through hole 442 in sequence and extend to the outside of the battery canister 100. For example, the column portion 310 can first pass through the first through hole 441 which is disposed on the lower side, and then pass through the second through hole 442 which is disposed on the upper side.

[0161] The upper wall 110 of the battery canister 100 may be disposed radially outward of the neck 410. For example, the inner circumferential surface of the terminal hole 111 of the upper wall 110 may be disposed close to the outer circumferential surface of the neck 410. For example, the outer diameter of the neck 410 may correspond to the diameter of the terminal hole 111.

[0162] For example, the neck 410 may be configured to be inserted into the terminal hole 111 of the upper wall 110 from the receiving space inside the battery can 100, such that at least a portion is exposed to the outside of the battery can 100. For example, the neck 410 may extend axially from the lower side to the upper side through the terminal hole 111 of the upper wall 110.

[0163] At this time, since a main body portion 420 with a diameter larger than that of the terminal hole 111 is provided at the lower end of the neck 410, the main body portion 420 is locked into the upper wall 110, thereby restricting the upward movement of the neck 410. As a result, during the manufacturing process of the secondary battery, excessive extension of the neck 410 to the outside of the battery canister 100 can be prevented, and stable assembly is possible.

[0164] At least a portion of the upper end of the neck 410 exposed to the outside of the battery canister 100 can be bent radially outward by the arm of the column 310.

[0165] Specifically, the neck 410 may include: a first portion 411 that extends integrally from the body portion 420 and is disposed in close contact with the inner peripheral surface of the terminal hole 111; and a second portion 412 that passes through the through hole 440 from below and is disposed on the outside.

[0166] In the secondary battery assembly process of this disclosure, the neck 410 can be assembled to pass through the terminal hole 111 of the upper wall 110 from the inside of the battery can 100 and discharge to the outside of the battery can 100. For example, after the second part 412 of the neck 410, which is disposed on the upper side, passes through the terminal hole 111, the first part 411, which is disposed on the lower side, is disposed inside the terminal hole 111.

[0167] A column body 311 of the column portion 310 may be provided on the radially inner side of the first portion 411. The first portion 411 may extend axially from the body portion 420 to engage with the inner circumferential surface of the terminal hole 111.

[0168] For example, the first part 411 of the neck 410 can be tightly inserted between the inner circumferential surface of the terminal hole 111 and the column body 311, thereby improving airtightness.

[0169] The second part 412 can bend and deform together with the column arm 312 during the bending process by external force. For example, the second part 412 can extend radially outward from the first part 411. For example, the second part 412 can be bent radially outward from the upper end of the first part 411. The second part 412 can be tightly inserted between the bent column arm 312 and the upper wall 110, thereby improving airtightness.

[0170] At least a portion of the first portion 411 and / or the second portion 412 of the neck 410 can be pressurized and compressed by the column portion 310. For example, the first portion 411 of the neck 410 can be compressed against the inner circumferential surface of the terminal hole 111 by a column body 311 inserted from the lower side of the first through hole 441. For example, the second portion 412 of the neck 410 can be compressed against the upper surface of the upper wall 110 by a column arm 312 pressurized by the first mold 810.

[0171] Referring again to Figure 1 , the main body portion 420, the first portion 411, and the second portion 412 may be integrally formed to wrap at least a part of the upper wall 110. For example, when observed in a longitudinal cross-section of the secondary battery, the main body portion 420 of the insulating unit 400, the first portion 411 and the second portion 412 of the neck portion 410 may be integrally formed, thus generally having an "L" shape.

[0172] For example, since the first portion 411 of the neck portion 410 is integrally formed along the outer edge of the first through hole 441 of the main body portion 420, a separated space may not be formed between the main body portion 420 and the first portion 411 of the neck portion 410. Therefore, it is possible to prevent the upper wall 110 of the battery can 100 formed with the terminal hole 111 from penetrating between the neck portion 410 and the main body portion 420 of the insulating unit 400.

[0173] In the present disclosure, for example, even when the battery can 100 is distorted, it is possible to prevent the upper wall 110 of the battery can 100 from penetrating between the neck portion 410 and the main body portion 420 of the insulating unit 400, resulting in contact between the electronic movement unit 300 and the upper wall 110. Therefore, in the present disclosure, by preventing the neck portion 410 and the main body portion 420 of the insulating unit 400 from being separated, the insulation performance can be further improved.

[0174] In an exemplary embodiment, the insulating unit 400 may include legs 430 provided along the periphery of the edge of the main body portion 420. For example, the legs 430 may be provided in an annular shape having a predetermined diameter. For example, the legs 430 may extend axially downward from the lower surface of the main body portion 420.

[0175] The legs 430 may be provided between the electrode assembly 200 and the side wall 120 of the battery can 100, thereby preventing the electrode assembly 200 from being electrically connected to the battery can 100. Specifically, the legs 430 may be provided to cover the radially outer sides of the uncoated portion 222 of the positive electrode of the electrode assembly 200 and the bottom 320 of the electronic movement unit 300 combined with the uncoated portion 222 of the positive electrode, thereby preventing the uncoated portion 222 of the positive electrode and the bottom 320 from contacting the battery can 100.

[0176] A partial section of the lower portion of the legs 430 may be provided to cover the outer side surface of the electrode assembly 200, and a partial section of the upper portion of the legs 430 may be provided to cover the combined portion of the uncoated portion 222 of the positive electrode protruding from the electrode assembly 200 and the bottom 320.

[0177] For example, a partial section of the upper portion of the legs 430 may be provided to be separated from the combined portion of the uncoated portion 222 of the positive electrode and the bottom 320.

[0178] For example, a mounting space 450 may be formed inside the main body 420 and the leg 430. For example, the mounting space 450 may be defined by the radially inner space of the leg 430 and the lower space of the main body 420.

[0179] The placement space 450 of the insulating unit 400 can be formed to accommodate and support at least a portion of the bottom 320 of the electronic moving unit 300.

[0180] For example, the bottom 320 of the electronic moving unit 300 can be placed within the placement space 450. In this disclosure, by placing the bottom 320 of the electronic moving unit 300 within the placement space 450 of the insulating unit 400, which is at least formed of an elastic material, interference between the battery canister 100 and the electronic moving unit 300 that may occur during the assembly of the secondary battery can be prevented. For example, interference between the bottom 320 and the upper wall 110 of the battery canister 100 can be prevented by the main body 420 of the insulating unit 400, and interference between the bottom 320 and the side wall 120 of the battery canister 100 can be prevented by the legs 430 of the insulating unit 400.

[0181] Figures 4 to 7 This is a diagram schematically illustrating the manufacturing process of a secondary battery according to an exemplary embodiment of the present disclosure.

[0182] Specifically, Figure 4 This diagram schematically illustrates the process of placing an integrally formed electronic movement unit 300 onto an electrode assembly 200 in an exemplary embodiment of this disclosure. Figure 5 This diagram schematically illustrates the state in which the bottom 320 of the electronic moving unit 300 is engaged with the positive terminal 220 of the electrode assembly 200 in an exemplary embodiment of this disclosure. Figure 6 This diagram schematically illustrates the process of combining the battery canister 100, the electronic movement unit 300, and the insulating unit 400 in an exemplary embodiment of this disclosure. Figure 7 This is a diagram schematically illustrating a riveting process according to an exemplary embodiment of the present disclosure.

[0183] The following is for reference Figures 4 to 7 The manufacturing process of a secondary battery according to an exemplary embodiment of the present disclosure will be described in detail.

[0184] In existing conventional cylindrical secondary batteries, a current collector and electrode terminals are separately provided to provide a path for electron movement.

[0185] In a conventional cylindrical secondary battery, the battery can 100 is riveted inside with the individually provided electrode terminals inserted from the outside of the battery can 100 into the internal receiving space.

[0186] In addition, the current collector is inserted into the receiving space in a state of being combined with the electrode assembly 200, and the current collector is joined to the electrode terminals fixed on the battery can 100 inside the battery can 100 by means of welding or the like.

[0187] In this existing method, in order to provide a path for the movement of electrons, a bonding process between the current collector and the electrode terminals is required. This bonding process needs to be carried out inside the battery canister 100. Therefore, there is a problem that foreign matter such as fumes or dust generated during the welding process may remain inside the battery canister 100.

[0188] Therefore, in various embodiments of this disclosure, a method for manufacturing a secondary battery and the battery can be proposed that easily manages foreign matter inside the battery can 100 by omitting the joining process of components inside the battery can 100.

[0189] First, refer to Figure 4 The electronic moving unit 300 can be prepared by integrally forming a bottom 320 having an area capable of covering the upper end surface of the electrode assembly 200 and a column portion 310 extending upward from the bottom 320.

[0190] In this disclosure, the electronic movement unit 300 may be a component that provides an electronic movement path from the electrode assembly 200 to an externally configured part.

[0191] In this disclosure, an electronic movement unit 300 may be disposed at the upper end of an electrode assembly 200 wound in the form of a core.

[0192] Reference Figure 5 The electronic moving unit 300 can be coupled to the uncoated positive electrode portion 222 exposed on the upper side of the electrode assembly 200. For example, the electronic moving unit 300 can be coupled to the uncoated positive electrode portion 222 by welding or laser welding while it is positioned on the upper end face of the electrode assembly 200. However, the coupling method is not limited to this.

[0193] The bonding process between the electronic moving unit 300 and the uncoated positive electrode portion 222 can be performed outside the battery canister 100. Therefore, foreign matter such as smoke or dust that may be generated during the bonding process can be prevented from flowing into the interior of the battery canister 100.

[0194] In various embodiments of this disclosure, since the electronic movement unit 300, which provides the movement path of electrons, is integrally formed, the joining process such as welding of each part can be omitted, thereby preventing the generation of foreign objects inside the battery canister 100 and making it easy to manage foreign objects.

[0195] Reference Figure 6In the manufacturing process of secondary batteries, the electrode assembly 200, with the electronic moving unit 300 attached to its upper end, can be inserted into the internal storage space of the battery canister 100.

[0196] At this time, the aforementioned insulating unit 400 can be provided on the upper part of the electronic moving unit 300. That is, the insulating unit 400 can be provided between the battery canister 100 and the electronic moving unit 300.

[0197] An insulating unit 400 and an electronic movement unit 300 may be sequentially arranged on the lower part of the upper wall 110 of the battery can 100. For example, the terminal hole 111 formed in the upper wall 110 of the battery can 100, the through hole 440 formed in the neck 410 of the insulating unit 400, and the column portion 310 of the electronic movement unit 300 may be arranged coaxially along the central axis of the battery can 100.

[0198] In an exemplary embodiment, with the insulating unit 400 and the electronic moving unit 300 sequentially arranged in the internal accommodating space of the battery can 100, the upper wall 110 of the battery can 100, the insulating unit 400 and the electronic moving unit 300 can be joined together in a direction that brings them closer to each other along the axial direction.

[0199] For example, the neck 410 of the insulating unit 400 can pass axially from the lower side to the upper side through the terminal hole 111 of the upper wall 110, and at least a portion of it is disposed on the outside of the battery can 100. In this case, since a main body portion 420 extending radially and having a diameter larger than the diameter of the terminal hole 111 is provided at the lower part of the neck 410, the main body portion 420 is engaged with the upper wall 110 of the battery can 100, thereby restricting the upward movement of the neck 410. Therefore, even if the assembly of the insulating unit 400 begins from the inside of the poorly visible battery can 100, excessive protrusion of the neck 410 through the terminal hole 111 can be prevented, and stable assembly is possible.

[0200] Furthermore, the column portion 310 of the electronic moving unit 300, which is coupled to the electrode assembly 200, can pass axially from the lower side to the upper side through the through hole 440 of the neck 410, and at least a portion of it is exposed to the outside of the battery canister 100. At this time, since a bottom portion 320 extending radially and having a diameter larger than that of the terminal hole 111 and the through hole 440 is provided at the lower part of the column portion 310, the bottom portion 320 is engaged with the main body portion 420 of the insulating unit 400, thereby restricting the upward movement of the column portion 310. Therefore, even if the assembly of the insulating unit 400 begins from the inside of the poorly visible battery canister 100, excessive protrusion of the neck 410 through the terminal hole 111 can be prevented, and stable assembly is possible.

[0201] In an exemplary embodiment, when the post portion 310 of the electronic moving unit 300 is inserted into the inner side of the through hole 440 of the insulating unit 400, the bottom portion 320 provided at the lower part of the post portion 310 can be disposed inside the placement space 450 of the insulating unit 400. For example, the upper surface of the bottom portion 320 can be disposed on the lower surface of the main body portion 420 of the insulating unit 400.

[0202] During the assembly of the secondary battery, by placing the bottom 320 in the placement space 450 of the insulating unit 400, at least a portion of the bottom 320 can be supported by the main body 420 and the legs 430 of the insulating unit 400. Therefore, in this disclosure, interference between the battery canister 100 and the electronic moving unit 300 that may occur during the assembly of the secondary battery can be prevented.

[0203] Reference Figure 7 In the manufacturing process of a secondary battery according to an exemplary embodiment of the present disclosure, the post portion 310 of the electronic moving unit 300 can be tightly inserted into the through hole 440 formed in the neck 410 of the insulating unit 400. Furthermore, with the post portion 310 inserted into the through hole 440, the neck 410 can be provided through the terminal hole 111 of the upper wall 110.

[0204] At this time, the column 310 can be inserted into the through hole 440 of the neck 410 from the bottom to the top along the axial direction, and the neck 410 can also be inserted into the terminal hole 111 from the bottom to the top along the axial direction.

[0205] That is, in this disclosure, since the electronic moving unit 300 and the insulating unit 400 are each integrally formed, the assembly process of the secondary battery can be performed simply by inserting and joining each component inside the battery canister 100, and the welding and other joining processes inside the battery canister 100 can be omitted. Therefore, the assembly process of the secondary battery can be simplified and made more efficient.

[0206] In an exemplary embodiment of this disclosure, in the electronic movement unit 300 coupled with the electrode assembly 200, the post portion 310 is coupled to the terminal hole 111 via the neck 410, thereby preventing radial wobble. Additionally, in the electronic movement unit 300, the bottom 320, integrally formed with the post portion 310, is fixed within the placement space 450 by the main body 420 of the insulating unit 400, thereby preventing axial wobble.

[0207] Refer again Figure 7 The height of the neck 410 of the insulating unit 400 can be made higher than the height of the column portion 310 disposed inside the through hole 440. The upper end of the insulating unit 400 can be made higher than the upper end of the column arm 312. This is to prevent the column arm 312, which bends during the riveting process, from contacting the upper surface of the upper wall 110.

[0208] On the other hand, the secondary battery manufacturing apparatus disclosed herein is used to perform a riveting process and may include a first mold 810 and a second mold 820, which will be described later.

[0209] The first mold 810 of the secondary battery manufacturing apparatus can be set outside the battery canister 100 and can move up and down along the axial direction.

[0210] The first mold 810 can provide axial downward pressure on the electronic moving unit 300, which is disposed inside the battery can 100, and at least a portion of the electronic moving unit 300 passes through the terminal hole 111 of the battery can 100 and protrudes to the outside.

[0211] For example, the first mold 810 can provide downward pressure on the upper end of the column portion 310 and the upper end of the neck 410, which are disposed outside the battery can 100 and protrude outside the battery can 100 through the terminal hole 111.

[0212] The upper ends of the column portion 310 and the neck portion 410, which protrude from the terminal hole 111 of the upper wall 110 to the outside of the battery canister 100, can be pressed and deformed by the first mold 810 to enlarge their respective diameters. Here, the process of pressing and deforming the upper ends of the column portion 310 and the neck portion 410 to fix them to the upper wall 110 by the first mold 810 is described as a riveting process.

[0213] In this disclosure, a portion of the upper end of the neck 410 is pressurized and deformed by the column arm 312 through a riveting process, thereby forming a second portion 412 that extends radially outward from the first portion 411 disposed on the inner circumferential surface of the terminal hole 111.

[0214] In the conventional manufacturing process of cylindrical secondary batteries, the riveting process is performed inside the battery can 100, and is carried out by applying pressure from inside the battery can 100 upwards to bend a portion of the lower end of the electrode terminals. However, when the riveting process is performed inside the battery can 100, there is a problem that the operator has difficulty in confirming whether the portion of the electrode terminals is properly deformed, and even if defects occur, it is difficult to identify them.

[0215] In contrast, in this disclosure, since the riveting process is performed on the outside of the battery can 100, the operator can easily check from the outside of the battery can 100 whether the pillar arm 312 of the pillar 310 is properly deformed or whether the neck 410 is properly deformed together with the pillar arm 312, thereby making it easy to manage defects in the manufacturing process.

[0216] On the other hand, in an exemplary embodiment, since the riveting process is performed with the electronic moving unit 300 positioned at the upper end of the electrode assembly 200, the pressure may be transmitted to the electrode assembly 200 during the downward pressing of the column portion 310 by the first mold 810.

[0217] Therefore, the secondary battery manufacturing apparatus of this disclosure may include a second mold 820, at least a portion of which is disposed inside the battery canister 100 and supports the electronic moving unit 300 in response to downward pressure applied to the first mold 810.

[0218] The second mold 820 can be disposed inside the battery canister 100 and supports the electronic moving unit 300 under downward pressure from the first mold 810. For example, the second mold 820 can be disposed in the receiving space inside the battery canister 100 and support at least a portion of the lower part of the column portion 310 of the electronic moving unit 300.

[0219] For example, the second mold 820 may be disposed in the central space 210 of the winding central shaft including the electrode assembly 200. For example, the central space 210 may be the space where the mandrel used in the winding process of the electrode assembly 200 is disposed.

[0220] In an exemplary embodiment, the second mold 820 may be configured to be axially movable within the central space 210. For example, the second mold 820 may be configured to move to a position at the same height as or higher than the height of the uncoated portion of the electrode protruding above the electrode assembly 200 (e.g., the uncoated positive electrode portion 222).

[0221] For example, the second mold 820 can support the electronic moving unit 300 at the same or higher position as the uncoated positive electrode portion 222 of the electrode assembly 200. Therefore, in this disclosure, even when the riveting process is performed with the electronic moving unit 300 positioned on the electrode assembly 200, no pressure is applied to the electrode assembly 200.

[0222] Furthermore, in this disclosure, since the second mold 820 is disposed in the central space 210 of the electrode assembly 200, it can support the lower part of the column portion 310, which is directly subjected to pressure by the first mold 810. Therefore, in this disclosure, cracks can be prevented between the integrally formed column portion 310 and the bottom 320 due to the pressure applied by the first mold 810 during the riveting process.

[0223] On the other hand, in an exemplary embodiment, the second mold 820 may include a slot (not shown) capable of accommodating a diaphragm 240 disposed in the central space 210. For example, the slot may be formed by a downward recess from the upper end face of the second mold 820, thereby accommodating at least a portion of the diaphragm 240 internally. Therefore, even when moving axially up and down in the central space 210, which serves as the winding center of the electrode assembly 200, the second mold 820 can move smoothly while preventing interference with the diaphragm 240.

[0224] Figure 8 This is a flowchart of a secondary battery manufacturing method according to an exemplary embodiment of the present disclosure.

[0225] Reference Figure 8 The secondary battery manufacturing method may include an external bonding step S910 of bonding the electronic moving unit 300 and the electrode assembly 200. The bonding of the electronic moving unit 300 and the electrode assembly 200 may be performed outside the battery canister 100.

[0226] The secondary battery manufacturing method disclosed herein may include step S920 of internally combining an electronic moving unit 300 and an insulating unit 400 inside a battery can 100.

[0227] In the internal bonding step S920, the electrode assembly 200, to which the electronic movement unit 300 is bonded at its upper end, can be inserted into the receiving space of the battery canister 100. At this time, the aforementioned insulating unit 400 can be provided on the upper part of the electronic movement unit 300.

[0228] In the internal bonding step S920, the battery canister 100, the insulating unit 400, and the electronic moving unit 300 can be bonded together in a state where the terminal hole 111 formed on the upper wall 110 of the battery canister 100, the neck 410 of the insulating unit 400, and the column portion 310 of the electronic moving unit 300 are coaxially arranged.

[0229] With the electronic moving unit 300 and the electrode assembly 200 disposed together inside the battery can 100, the post 310 can be inserted from inside the battery can 100 to the outside into the terminal hole 111, and at least a portion of the upper end of the post 310 can pass through the terminal hole 111 and be exposed to the outside of the battery can 100.

[0230] For example, the post portion 310 can be inserted into the through hole 440 of the neck 410, and the neck 410 can be inserted into the terminal hole 111 of the upper wall 110. In this disclosure, the post portion 310 is inserted axially from the bottom to the top of the terminal hole 111 from the inside of the battery can 100, and an insulating unit 400 is inserted between the post portion 310 and the upper wall 110 of the battery can 100, thereby insulating the two.

[0231] In the internal bonding step S920, the electronic moving unit 300 and the insulating unit 400 disposed inside the battery can 100 are inserted into the terminal hole 111 of the upper wall 110, thereby ensuring the efficiency of the manufacturing process.

[0232] The secondary battery manufacturing method disclosed herein may include a riveting step S930 in which pressure is applied to the column portion 310 from the outside of the battery canister 100 to perform a riveting process.

[0233] In the riveting step S930, the column portion 310, which is exposed to the outside of the battery can 100 through the terminal hole 111 in the internal joining step S920, is subjected to downward pressure along the axial direction by the first mold 810 located on the upper side of the battery can 100. Under the pressure of the first mold 810, the column arm 312 of the column portion 310 bends radially outward, thereby joining with the upper wall 110 of the battery can 100. At the same time, under the pressure of the first mold 810, the neck 410 of the insulating unit 400 also bends, causing the second portion 412 of the neck 410 to be pressed between the column arm 312 and the upper wall 110, thereby achieving an airtight connection between the column portion 310 and the upper wall 110.

[0234] On the other hand, for the downward pressure applied by the first mold 810, the second mold 820 disposed inside the battery canister 100 can support the electronic movement unit 300 upwards. In this disclosure, since the second mold 820 supports the electronic movement unit 300 at the same or higher position as the uncoated positive electrode portion 222 of the electrode assembly 200, the pressure applied by the first mold 810 can be prevented from being transmitted to the electrode assembly 200. In addition, in this disclosure, the second mold 820 supports the area corresponding to the pillar portion 310 in the central space 210 of the electrode assembly 200, thereby preventing the integrally formed pillar portion 310 and bottom 320 from splitting.

[0235] In various embodiments of this disclosure, the positive terminal 220 and the negative terminal 230 are exemplary, and it should be understood that they can be switched to be applied.

[0236] According to the various embodiments of the present disclosure described above, by omitting the joining process between components inside the battery can 100, it is possible to easily manage foreign objects inside the battery can 100.

[0237] Furthermore, in this disclosure, the number of components can be reduced by integrally forming the electronic movement unit.

[0238] In addition, by integrally forming the insulating unit 400 in this disclosure, the battery can 100 can be prevented from penetrating between the neck 410 and the main body 420, thereby improving insulation.

[0239] Furthermore, in this disclosure, the assembly process inside the battery can 100 is performed by inserting and combining the electronic moving unit and the insulating unit 400, thereby making the assembly process more efficient.

[0240] Furthermore, in this disclosure, by performing a riveting process on the column portion 310 of the electronic moving unit 300 outside the battery can 100, the deformation of the column arm 312 can be easily confirmed, thereby reducing the defect rate.

[0241] Even though all components constituting the embodiments of this disclosure are described as operating in combination or in combination, this disclosure is not necessarily limited to these embodiments. That is, all components may also be selectively combined as one or more to operate, provided they are within the scope of the purpose of this disclosure. Unless otherwise defined, all terms, including technical or scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms in general use, such as those defined in dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and in this disclosure, unless explicitly defined, shall not be interpreted as having an idealized or overly formal meaning.

[0242] The above description is merely an illustrative illustration of the technical concept of this disclosure. Those skilled in the art to which this disclosure pertains can make various modifications and variations without departing from the essential characteristics of this disclosure. Therefore, the embodiments disclosed in this disclosure are only for illustrating the technical concept of this disclosure and are not intended to limit it. The scope of the technical concept of this disclosure is not limited to these embodiments. The scope of protection of this disclosure should be interpreted according to the claims, and should be construed as including all technical concepts within the equivalent scope within the scope of the claims.

Claims

1. A secondary battery, comprising: The battery canister contains the electrode assembly and has a terminal hole formed on one side. An electronic movement unit is disposed inside the battery can, and at least a portion of the electronic movement unit protrudes to the outside of the battery can through the terminal hole; as well as An insulating unit is inserted between the electronic moving unit and the battery canister.

2. The secondary battery according to claim 1, wherein, The electronic mobility unit includes: The bottom, inside the battery can, is connected to the electrode assembly; and The column extends axially upward from the bottom.

3. The secondary battery according to claim 2, wherein, The column portion includes: A column body is integrally formed with the bottom, and at least a portion of the column body is disposed inside the terminal hole; and The column arm bends radially outward from the column body.

4. The secondary battery according to claim 2, wherein, The bottom is coupled to the uncoated portion of the electrode assembly.

5. The secondary battery according to claim 2, wherein, The insulating unit includes: The main body is disposed between the bottom and the upper wall of the battery can forming the terminal hole; and The neck extends axially upward from the main body and is disposed in close contact with the column.

6. The secondary battery according to claim 5, wherein, The neck includes: The first part extends from the main body and is in close contact with the inner peripheral surface of the terminal hole; and The second part extends radially outward from the first part.

7. The secondary battery according to claim 6, wherein, The main body, the first part, and the second part are integrally formed to enclose at least a portion of the upper wall.

8. The secondary battery according to any one of claims 5 to 7, wherein, The insulating unit includes a leg that extends axially downward along the outer edge of the main body.

9. The secondary battery according to claim 8, wherein, The insulating unit includes a mounting space defined by the lower space of the main body and the radially inner space of the legs. The bottom is disposed in the placement space.

10. A secondary battery manufacturing apparatus, comprising: A first mold provides axial downward pressure to an electronic moving unit, wherein the electronic moving unit is disposed inside a battery can, and at least a portion thereof passes through a terminal hole in the battery can and protrudes to the outside. as well as The second mold, at least a portion of which is disposed inside the battery canister, supports the electronic moving unit.

11. The secondary battery manufacturing apparatus according to claim 10, wherein, The electronic mobility unit includes: At the bottom, on the upper part of the electrode assembly, a position corresponding to the uncoated portion of the electrode assembly; and The column portion is located on the upper part of the electrode assembly, at a position corresponding to the center space of the electrode assembly. The second mold is configured to support the column in the central space.

12. The secondary battery manufacturing apparatus according to claim 10 or 11, wherein, The second mold supports the electronic moving unit at a position at the same height or higher than the uncoated portion of the electrode protruding to the upper side of the electrode assembly.

13. A method for manufacturing a secondary battery, comprising: The external bonding step combines the electronic movement unit and the electrode assembly, wherein the column and bottom of the electronic movement unit are integrally formed; The internal bonding step involves bonding the electronic moving unit and the insulating unit inside the battery canister; as well as The riveting step involves applying pressure to at least a portion of the electronic moving unit outside the battery canister. In the riveting step, pressure is applied to the post portion, wherein the post portion protrudes to the outside of the battery can through a terminal hole formed in the upper wall of the battery can during the internal joining step.

14. The method for manufacturing a secondary battery according to claim 13, wherein, The insulating unit includes: The main body is disposed between the bottom and the upper wall; and The neck extends from the body portion through the terminal hole to enclose the column portion. During the riveting step, the upper end of the neck bends together with at least a portion of the column by the applied pressure.

15. The method for manufacturing a secondary battery according to claim 13 or 14, wherein, In the riveting step, the applied pressure is provided by a first mold disposed outside the battery can, and the electronic moving unit is supported by a second mold disposed inside the battery can for the applied pressure.

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