WO2023221268A1 - 缩颈翻边装置及电池制造设备 - Google Patents

缩颈翻边装置及电池制造设备 Download PDF

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Publication number
WO2023221268A1
WO2023221268A1 PCT/CN2022/104464 CN2022104464W WO2023221268A1 WO 2023221268 A1 WO2023221268 A1 WO 2023221268A1 CN 2022104464 W CN2022104464 W CN 2022104464W WO 2023221268 A1 WO2023221268 A1 WO 2023221268A1
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WO
WIPO (PCT)
Prior art keywords
necking
inner mold
flanging device
shell
outer peripheral
Prior art date
Application number
PCT/CN2022/104464
Other languages
English (en)
French (fr)
Inventor
孟浩
潘有成
罗志新
温裕乾
朱文琪
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2023221268A1 publication Critical patent/WO2023221268A1/zh
Priority to US18/639,741 priority Critical patent/US20240261845A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/10—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws working inwardly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/263—Flanging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2638—Necking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic

Definitions

  • the present application relates to the technical field of battery manufacturing, specifically, to a necking and flanging device and electrical equipment.
  • the use of crimping technology to encapsulate battery cells can effectively increase the packaging speed.
  • the battery case needs to be necked and flanged, that is, after the electrode assembly is installed in the case , the shell is necked through the necking part.
  • the open end of the shell is gradually folded outward to form a flange part.
  • the flange part and the cover are connected through a rolling sealing process, so that the shell The inner cavity of the body forms a closed space.
  • the flanging quality of the flanging portion formed through the necking process is uneven, seriously affecting packaging accuracy and packaging yield.
  • This application provides a necking and flanging device and battery manufacturing equipment.
  • the necking and flanging device has a strong structural integration and can effectively improve the flanging quality and flanging stability of the flanging part, thus helping to improve the battery packaging yield rate. ;
  • This battery manufacturing equipment can effectively improve the flanging quality and yield of battery cases.
  • the present application provides a necking and flanging device, which includes: an inner mold; a necking piece arranged around the inner mold; the necking piece is movable along the radial direction of the inner mold; and the necking piece is used to communicate with the inner mold.
  • the mold cooperates to form the constriction part on the shell; the pressing part is arranged around the inner mold, the pressing part is movable along the axial direction of the inner mold, and the pressing part is used to cooperate with the constriction part to seal the shell. Flatten the flange.
  • the necking and flanging device is equipped with an inner mold, a necking piece and a pressing piece.
  • the inner mold is used to penetrate into the shell through the open end of the shell to support the shell from the inside of the shell, so as to facilitate the connection with the necking piece.
  • the constriction part is arranged around the inner mold to act on the outer peripheral surface of the shell.
  • the constriction part can move relative to the inner mold along the radial direction of the inner mold, that is, the constriction part
  • the shell can be fed along the radial direction of the shell relative to the shell to form a constricted portion on the shell.
  • the diameter of the constricted portion of the shell is reduced.
  • the open end of the shell is folded outward to form a flange part; the pressing part can move along the axial direction of the inner mold.
  • the pressing part moves along the axial direction of the inner mold and is close to the necking part, thereby closing the flange part.
  • the flange is flattened between the pressing part and the necking part.
  • the setting of the pressing piece facilitates the shaping and flattening of the flange formed by the necking, so that the angle of the flange's outward folding is controllable and more balanced, effectively improving the flanging quality of the flange; at the same time, the pressing The combined piece flattens the formed flange part, effectively improving the stability of the flange part after folding and reducing the risk of rebound deformation of the flange part, thereby further improving the accuracy and structural stability of the flange part;
  • the flanging device effectively improves the flanging quality and flanging stability of the casing, which is beneficial to improving battery packaging accuracy and yield.
  • the pressing part is annular, and the pressing part is set in the inner mold.
  • the pressing part is annular and is set in the inner mold. This arrangement effectively ensures the contact area between the pressing part and the flanging part, making the overall flanging part more evenly stressed along the circumferential direction of the shell. , to further improve the flattening quality, flattening balance and comprehensiveness of the flanging part.
  • the outer peripheral surface of the inner mold includes a first outer peripheral surface, a second outer peripheral surface and a transition surface.
  • the diameter of the first outer peripheral surface is greater than the diameter of the second outer peripheral surface.
  • the transition surface connects the first outer peripheral surface and the second outer peripheral surface.
  • the necking part is used to cooperate with the second outer peripheral surface, and the pressing part is sleeved on the first outer peripheral surface.
  • the diameter of the first outer circumferential surface is larger than the diameter of the second outer circumferential surface, and the first outer circumferential surface is used to fit or fit with the inner circumferential surface of the casing with a small gap to tighten the casing when the casing is necked. support, and at the same time define the connecting position of the flange part and the constriction part.
  • the diameter of the second outer circumferential surface is smaller than the diameter of the first outer circumferential surface, which facilitates the constriction part to be fed relative to the shell and along the radial direction of the shell and in the shell. A constriction is formed on the body.
  • the open end of the housing is naturally folded outward at the connection point between the first outer circumferential surface and the second outer circumferential surface to form a flange portion, and the transition surface is provided such that The folded part of the flange part can be smoothly transitioned to avoid the problem of fatigue cracks or even breakage of the shell due to stress concentration at the folded part of the shell, thus ensuring the structural strength of the shell.
  • the pressing member is slidably connected to the inner mold along the axial direction of the inner mold.
  • the pressing part is slidably connected to the inner mold along the axial direction of the inner mold, and the inner mold supports and guides the pressing part, thereby effectively improving the axial direction of the pressing part relative to the inner mold.
  • the stability of the movement improves the stability of the movement of the press-fitting part after the reverse force is applied when it flattens the flange part, thereby effectively ensuring the stability of the press-fit part flattening the flange part.
  • the necking and flanging device further includes: a first driving component for driving the pressing part to move along the axial direction of the inner mold.
  • the first driving component drives the pressing part to move along the axial direction of the inner mold, which effectively improves the operational convenience and controllability of the pressing part moving along the axial direction of the inner mold.
  • the first driving component is installed in the inner mold.
  • the first driving component is installed in the inner mold, that is, the first driving part and the pressing part are connected to the inner mold and can move synchronously with the inner mold.
  • the overall structure has strong integration. When the shell is replaced, the inner mold is moved out.
  • the press-fitting part can be moved out and away from the shell synchronously when the shell is in place, thereby effectively preventing the press-fitting part from interfering with the replacement of the shell; when the shell is necked and flanged, the inner mold synchronously drives the press-fitting part close to the shell, and the press-fitting part
  • the first driving component only needs to drive the pressing part to move a preset distance compared to the inner mold, which is beneficial to reducing the driving stroke of the first driving component, simplifying the structure of the overall necking and flanging device, and reducing the cost of the flanging part. Material costs.
  • the pressed part has a first surface facing the constriction part along the axial direction of the inner mold, and the first surface is a plane perpendicular to the axial direction of the inner mold.
  • the pressing part has a first surface facing the necking part, the first surface is perpendicular to the axial direction of the inner mold, and the first surface acts on the flanging part and flattens the flanging part, so that the flanging part becomes
  • the surface of the flange part can be as close to a plane as possible, and the plane where the flange part is located can be close to perpendicular to the axial direction of the shell, thereby effectively improving the flatness of the flange part and the balance of the folding angle, and reducing the Rebound risk.
  • a plurality of necking members are provided, and the plurality of necking members are distributed along the circumference of the inner mold.
  • multiple necking parts are distributed along the circumferential direction of the inner mold, that is to say, multiple necking parts can act on different positions in the circumferential direction of the same shell.
  • all the necking parts are Or some of the necking parts can act on the shell synchronously.
  • such a structure is helpful to improve the necking efficiency of the shell.
  • multiple necking parts act on the shell along the circumferential direction of the shell, effectively Improve the balance of the force on the shell and reduce the risk of deformation of the shell due to force on one side of the shell.
  • the necking and flanging device further includes: a second driving component for driving the necking member to move in the radial direction of the inner mold.
  • a second driving assembly is provided to drive the necking member to move in the radial direction of the inner mold, that is, when the shell is necked, the second driving assembly drives the necking member to feed or withdraw in the radial direction of the shell. , to form a constriction on the shell.
  • the necking member is a necking roller
  • the necking and flanging device further includes: a third driving component for driving the necking roller to revolve around the inner mold.
  • the necking part adopts a necking roller, and the necking roller can rotate along its own central axis.
  • the third driving component drives the necking roller to revolve around the inner mold, that is, when the shell is necked, the shell and The inner mold can remain stationary, and the third driving component drives the necking roller to revolve around the shell.
  • the radius of revolution gradually decreases, and the shell is compressed and deformed along its own radial direction until it fits the inner mold to form the necking portion;
  • the necking roller revolves around the shell driven by the third driving component, the shell can be fixedly installed and remain stationary with the inner mold.
  • the shell Compared with the traditional structure in which the shell rotates around its own central axis, it can effectively ensure that the shell is Structural stability during the necking process; at the same time, the shell is stationary relative to the inner mold, which can effectively avoid the problem of a large amount of metal chips generated due to relative sliding between the shell and the inner mold, thereby reducing the risk of metal chips falling into the inner cavity of the shell. Risk of short circuiting the electrode assembly.
  • the necking and flanging device further includes: a fixing mechanism, arranged opposite to the inner mold along the axial direction of the inner mold, for fixing the shell.
  • the necking and flanging device fixes the shell through a fixing mechanism, effectively ensuring the stability of the positioning of the shell during the necking and flanging process.
  • the inner mold has a gas channel, and the gas channel is used to introduce high-pressure gas into the housing.
  • the inner mold has a gas channel, and the gas channel is used to introduce high-pressure gas into the shell.
  • the high-pressure gas After the high-pressure gas is introduced into the shell, it can only pass through the gap between the inner peripheral surface of the shell and the outer peripheral surface of the inner mold.
  • the high-pressure gas is discharged from the shell, a small amount of metal shavings that may be generated during the fitting process of the inner peripheral surface of the casing and the inner mold can be directly brought out of the casing to prevent metal shavings from falling into the inner cavity of the casing. And affect the battery performance.
  • the high-pressure gas is used to blow the possible metal chips directly out of the casing to avoid the metal chips falling. It has a simple structure and outstanding chip removal effect.
  • the gas channel penetrates the inner mold along the axial direction of the inner mold.
  • the gas channel penetrates the inner mold along the axial direction of the inner mold.
  • the high-pressure gas enters the housing along the axial direction of the housing downwards and encounters the obstruction of the electrode assembly in the housing.
  • the rebound flows upward and rushes upward through the gap between the inner mold and the shell, thereby fully blowing the metal chips that may be generated between the inner mold and the shell upward out of the shell.
  • the gas channel runs through the inner mold along the axial direction of the inner mold. Effectively ensure the flow rate and direction of high-pressure gas, thereby giving full play to its role in removing metal chips.
  • the present application provides a battery manufacturing equipment, including the necking and flanging device of any of the above solutions.
  • the necking and flanging device is used to neck and flange the battery case.
  • the battery manufacturing equipment of the second embodiment of the present application can effectively improve the accuracy and structural stability of the flanging portion, which is beneficial to improving battery packaging accuracy and yield. .
  • Figure 1 is a schematic structural diagram of a shell formed with a constriction part and a flange part provided by some embodiments of the present application;
  • Figure 2 is a schematic structural diagram of a necking and flanging device provided by some embodiments of the present application.
  • Figure 3 is a top view of the necking and flanging device provided by some embodiments of the present application.
  • Figure 4 is a cross-sectional view along the line A-A shown in Figure 3;
  • Figure 5 is a partial enlarged view of part B shown in Figure 4.
  • Figure 6 is a schematic diagram of a state in which the inner mold of the necking and flanging device provided by some embodiments of the present application extends into the shell;
  • Figure 7 is a partial enlarged view of part C shown in Figure 6;
  • Figure 8 is a schematic diagram of the state of the necking and flanging device forming a necking portion on the shell according to some embodiments of the present application;
  • Figure 9 is a partial enlarged view of part D shown in Figure 8.
  • Figure 10 is a schematic diagram of a state in which the pressing part and the necking part of the necking and flanging device provided by some embodiments of the present application cooperate to flatten the flanging part;
  • Figure 11 is a partial enlarged view of part E shown in Figure 10;
  • Marking description 100-necking and flanging device; 10-inner mold; 11-first outer peripheral surface; 12-second outer peripheral surface; 13-transition surface; 14-gas channel; 15-avoidance opening; 16-connecting shaft; 20-necking part; 30-pressing part; 31-first surface; 32-connection part; 40-fixing mechanism; 200-casing; 210-necking part; 220-flange part.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • the term “plurality” refers to two or more (including two).
  • the crimping mentioned in the embodiments of this application refers to a type of packaging, a sealing process used for rigid and semi-rigid containers. Crimping is also called crimping. Crimping refers to the flanging of the container body. It hooks, curls and compresses the periphery of the container lid to seal the container.
  • the crimping seal can be used for metal containers such as iron containers, aluminum containers or rigid and semi-rigid containers made of other materials.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cells may include lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., or may be primary batteries or secondary batteries, which are not limited in the embodiments of the present application.
  • the battery cell refers to the smallest unit that makes up the battery.
  • the battery cell includes an end cover, a casing and an electrode assembly.
  • the casing has an open end for loading electrode assemblies, electrolytes and other parts into the casing.
  • the end cover is Refers to the component that covers the open end of the casing to isolate the internal environment of the casing from the external environment.
  • the casing can be made of a variety of materials, such as copper, iron, aluminum and other metal parts.
  • the shell and end caps can be encapsulated using a crimping sealing process.
  • the inventor of the present application found that when the battery cells are rolled and packaged, the error is large and the packaging yield is low.
  • the inventor found through research that the reason is that the flanging portion formed during the necking and flanging process of the battery cell casing before packaging has problems with uneven flanging or insufficient flanging.
  • the necking and flanging The folding angle of the flange formed by the process is easily changed due to rebound deformation, further aggravating the problem of uneven or insufficient flanging.
  • the quality of the flange directly affects the cell sealing accuracy and sealing yield.
  • the necking and flanging device includes an inner mold, a necking part and a pressing part.
  • the necking part is arranged around the inner mold, the necking part is movable along the radial direction of the inner mold, the necking part is used to cooperate with the inner mold to form the necking part on the shell, and the pressing part is arranged on the inner mold Around, the pressing part is movable along the axial direction of the inner mold, and the pressing part is used to cooperate with the necking part to flatten the flange part of the shell.
  • the diameter of the constriction part of the shell is reduced.
  • the open end of the shell is folded outward.
  • the pressing part moves along the axial direction of the inner mold and approaches the necking part during the necking process of the necking part or after the necking is completed, so that the flange part is formed between the necking part and the pressing part.
  • the setting of the pressing piece facilitates the guidance and shaping and flattening of the formation of the flange part, thereby making the angle of the flange part outwards folding controllable and more balanced, effectively improving the flanging quality of the flange part; at the same time , the pressing piece flattens the formed flange part, effectively improving the stability of the flange part after folding and reducing the risk of rebound deformation of the flange part, thereby further improving the accuracy and structural stability of the flange part; this
  • the applied flanging device effectively improves the battery cell packaging accuracy and yield by effectively improving the flanging quality and flanging stability of the housing.
  • the necking and flanging device disclosed in the embodiment of the present application can be used for, but is not limited to, the necking and flanging processing of battery casings, cans, barrels and other containers.
  • the following embodiments take the necking and flanging device used for the necking and flanging processing of the battery case as an example.
  • Figure 1 is a schematic structural view of a shell formed with a constriction portion and a flange portion provided in some embodiments of the present application
  • Figure 2 is a schematic diagram of a constriction and flanging device provided in some embodiments of the present application. Structural schematic diagram
  • Figure 3 is a top view of the necking and flanging device provided by some embodiments of the present application
  • Figure 4 is a cross-sectional view along the A-A direction shown in Figure 3
  • Figure 5 is a partial enlarged view of part B shown in Figure 4
  • Figure 6 is a schematic diagram of a state in which the inner mold of the necking and flanging device provided in some embodiments of the present application extends into the shell.
  • a necking and flanging device 100 which includes an inner mold 10, a necking part 20 and a pressing part 30.
  • the necking part 20 is arranged around the inner mold 10, and the necking part 20 is arranged along the inner mold 10.
  • the constriction part 20 is radially movable, and is used to cooperate with the inner mold 10 to form the constriction part 210 on the shell 200;
  • the pressing part 30 is arranged around the inner mold 10, and the pressing part 30 is arranged along the inner mold 10.
  • the pressing member 30 is axially movable and is used to cooperate with the necking member 20 to flatten the flange portion 220 of the housing 200 .
  • the constriction portion 210 is a portion of the housing 200 that is extruded and deformed by force to shrink in the radial direction.
  • the flange portion 220 is a portion formed by bending the open end of the housing 200 outward when the housing 200 is extruded and deformed to form the constriction portion 210.
  • the flange portion 220 is used to achieve crimping.
  • the inner mold 10 is used to penetrate into the housing 200 through the open end of the housing 200 to support the housing 200 from the inside of the housing 200 and to adjust the final formed shrinkage portion on the housing 200 .
  • the depth of 210 acts as a limiter, and the inner mold 10 can be connected to a driving mechanism.
  • the driving mechanism drives the inner mold 10 to move along its own axial direction, so as to extend into or withdraw from the housing 200.
  • the inner mold 10 The position can also be fixed. When the position of the inner mold 10 is fixed, the open end of the housing 200 can be sleeved on the inner mold 10 .
  • the axial direction of the inner mold 10 extends along the The axial direction of the body 200 extends, and the radial direction of the inner mold 10 extends along the radial direction of the housing 200 .
  • the necking part 20 refers to a component that cooperates with the inner mold 10 to form the necking part 210 on the shell 200.
  • the necking part 20 can be connected to a driving mechanism, and the driving mechanism drives the necking part 20 to move along the radial direction of the inner mold 10. So that the necking part 20 can be fed along the radial direction of the shell 200 to squeeze the shell 200.
  • the shell 200 is compressed and deformed along its own radial direction after being stressed.
  • the necking part 20 cooperates with the inner mold 10 to compress the shell 200. Apply force and limit the position until the housing 200 forms the constriction portion 210. At the same time, the open end of the housing 200 will gradually evert out during the constriction process to initially form the flange portion 220.
  • the necking member 20 can also be fixedly arranged (that is, the necking member 20 does not move along the radial direction of the shell 200).
  • the shell 200 and the inner mold 10 synchronize along the radial direction of the inner mold 10.
  • the constriction member 20 is fed toward the constriction member 20 so that the constriction member 20 presses the housing 200 .
  • the necking part 20 can be a conventional necking part such as a necking hob or a necking roller.
  • the housing 200 can rotate around its central axis so that the necking part 20 can be in the shell.
  • a constriction portion 210 is formed on the body 200.
  • the casing 200 can also be kept stationary, and the constriction member 20 rotates around the circumference of the casing 200.
  • the housing 200 and the inner mold 10 may rotate relative to each other or remain relatively stationary.
  • the pressing part 30 is disposed around the inner mold 10.
  • the pressing part 30 can adopt a variety of implementation structures.
  • the pressing part 30 can include a plurality of sub-pressing parts, and the plurality of sub-pressing parts are spaced around the circumference of the housing 200. distribution, each sub-pressing part can move along the axial direction of the inner mold 10 independently.
  • the pressing part 30 can also be an integral structure.
  • the pressing part 30 can be sleeved on the periphery of the inner mold 10 .
  • the movement of the pressing part 30 can be driven manually or by a linear drive mechanism.
  • the pressing part 30 can be driven and moved using a linear driving component such as a screw rod or a cylinder.
  • Figure 7 is a partial enlarged view of part C shown in Figure 6.
  • Figure 8 is a schematic diagram of the state of the necking and flanging device forming the necking portion on the shell according to some embodiments of the present application.
  • Figure 9 is a partial enlarged view of part D shown in Figure 8.
  • Figure 10 is a schematic diagram of the state in which the pressing part and the constricting part of the necking and flanging device provided by some embodiments of the present application cooperate to flatten the flanging part.
  • Figure 11 This is a partial enlarged view of part E shown in Figure 10. During the forming process of the constricted portion 210, the diameter of the constricted portion 210 of the housing 200 gradually decreases.
  • the open end of the housing 200 is folded outward to initially form a flange portion 220.
  • the pressing part 30 moves toward the necking part 20 along the axial direction of the inner mold 10, and the flange part 220 is gradually clamped between the pressing part 30 and the necking part 20, so as to Flatten the flange portion 220 .
  • the arrangement of the pressing member 30 facilitates the shaping and flattening of the flange portion 220 formed by the necking, so that the angle of the flange portion 220 that is folded outward is controllable and more balanced, effectively improving the flanging quality of the flange portion 220; At the same time, the stability of the flange portion 220 after being folded is effectively improved and the risk of rebound deformation of the flange portion 220 is reduced, thereby further improving the accuracy and structural stability of the flange portion 220 .
  • the pressing member 30 is annular, and the pressing member 30 is sleeved on the inner mold 10 .
  • the pressing member 30 may be an annular member with an integrated structure, or may be assembled from at least two parts to form an annular structure.
  • the width of the pressing part 30 along the radial direction of the housing 200 may be greater than the maximum width of the flange part 220 after it is finally flattened, or may be smaller than the maximum width of the flange part 220 after it is finally flattened.
  • the pressing part The width of 30 along the radial direction of the housing 200 is greater than the width of the flange portion 220 after it is finally flattened, so as to effectively increase the contact area between the pressing member 30 and the flange portion 220 .
  • the flange portion 220 formed at the open end of the housing 200 is annular, and the pressing member 30 is also arranged in an annular shape and is sleeved on the inner mold 10 so that the pressing member 30 can balance the flange portion 220 along its circumferential direction.
  • This arrangement effectively ensures the contact area of the pressing part 30 and the flanging part 220, so that the entire flanging part 220 is in full contact along the periphery of the housing 200.
  • the force is more uniform in the direction, further improving the flattening quality, flattening balance and comprehensiveness of the flange portion 220.
  • the outer circumferential surface of the inner mold 10 includes a first outer circumferential surface 11, a second outer circumferential surface 12 and a transition surface 13.
  • the diameter of the first outer circumferential surface 11 is larger than the second outer circumferential surface.
  • the diameter of the surface 12 , the transition surface 13 connects the first outer peripheral surface 11 and the second outer peripheral surface 12 , the necking part 20 is used to cooperate with the second outer peripheral surface 12 , and the pressing part 30 is sleeved on the first outer peripheral surface 11 .
  • the first outer peripheral surface 11 is closer to the open end of the housing 200 along the axial direction of the housing 200 , and the diameter of the first outer peripheral surface 11 can match the inner diameter of the housing 200 , so that the first outer peripheral surface 11 is in contact with the inner peripheral surface of the housing 200.
  • the diameter of the second outer peripheral surface 12 is smaller than the diameter of the first outer peripheral surface 11.
  • the second outer peripheral surface 12 is used to cooperate with the constriction member 20 to form a constriction portion on the housing 200. 210, and when the necking member 20 exerts force on the housing 200 so that the wall surface of the housing 200 abuts against the second outer peripheral surface 12, the open end of the housing 200 can move along the first outer peripheral surface 11 and the second outer peripheral surface 12.
  • the connection portion is folded and deformed outward to form a flange portion 220 .
  • the diameter of the first outer circumferential surface 11 is larger than the diameter of the second outer circumferential surface 12 .
  • the first outer circumferential surface 11 is used to fit or fit with the inner circumferential surface of the housing 200 with a small gap to tighten the housing when the housing 200 is necked. 200 for support and at the same time defining the connecting position of the flange portion 220 and the constriction portion 210.
  • the diameter of the second outer circumferential surface 12 is smaller than the diameter of the first outer circumferential surface 11, which facilitates the constriction part 20 relative to the shell 200 and along the shell 200.
  • the radial feed is used to form the constriction portion 210 on the housing 200 .
  • the open end of the housing 200 is naturally folded outward at the connection between the first outer peripheral surface 11 and the second outer peripheral surface 12 to form a flange portion 220 .
  • the setting of the transition surface 13 enables a smooth transition of the folded part of the flange part 220, avoiding the problem of fatigue cracks or even fractures in the case 200 due to stress concentration at the folded part of the flange part 220, thus ensuring the structure of the case 200. strength.
  • the inner mold 10 has an escape opening 15 along its axial end.
  • the escape opening 15 can form an escape space for the electrode assembly to extend into, effectively preventing the inner mold 10 from contacting the electrode.
  • the components especially the tab area of the electrode assembly) interfere.
  • the pressing member 30 is slidably connected to the inner mold 10 along the axial direction of the inner mold 10 .
  • the inner mold 10 and the pressing part 30 can be slidably connected to the inner mold 10 through structures such as guide rail assemblies.
  • a guide rail extending along the axial direction of the inner mold 10 can be provided on the inner mold 10
  • a guide rail extending along the axial direction of the inner mold 10 can be provided on the pressing part 30.
  • the guide groove is matched with the guide rail, and the guide rail is disposed in the guide groove so that the inner mold 10 and the pressing part 30 are slidably connected.
  • the inner mold 10 may include a connecting shaft 16 coaxial with the housing 200.
  • the pressing part 30 includes a connecting part 32.
  • the connecting part 32 is sleeved on the connecting shaft 16 and is slidably connected to the inner mold 10. .
  • the pressing part 30 is slidably connected to the inner mold 10 along the axial direction of the inner mold 10.
  • the inner mold 10 plays a supporting and guiding role for the pressing part 30, effectively improving the axis of the pressing part 30 relative to the inner mold 10.
  • the stability of the movement in the direction is improved, and the stability of the movement of the pressing part 30 after being pressed in the opposite direction when flattening the flange part 220 is improved, thereby effectively ensuring the stability of the pressing part 30 flattening the flange part 220 .
  • the necking and flanging device 100 further includes a first driving assembly (not shown in the figure), which is used to drive the pressing member 30 to move along the axial direction of the inner mold 10 .
  • the first driving component is a component capable of outputting a linear driving force to drive the pressing member 30 to move along the axial direction of the inner mold 10.
  • the first driving component may, but is not limited to, use a linear cylinder, a screw rod, a single-axis manipulator, etc., and has a linear
  • the driving function is sufficient, and the first driving component will not be described in detail in the embodiment of this application.
  • the embodiment of the present application implements the function of axial movement of the pressing part 30 along the inner mold 10 by arranging a first driving component, thereby effectively improving the operational convenience and controllability of the axial movement of the pressing part 30 along the inner mold 10 .
  • the first driving component can be set separately relative to the inner mold 10 , or can be directly installed on the inner mold 10 .
  • the first driving assembly is installed on the inner mold 10 .
  • the installation position and installation method of the first driving component on the inner mold 10 can be flexibly set according to the arrangement structure of the pressing part 30 to achieve the purpose of driving the pressing part 30 to move along the axial direction of the inner mold 10 .
  • the first driving component can use a screw nut assembly.
  • the screw rod is installed on the inner mold 10.
  • the screw rod extends along the axial direction of the inner mold 10.
  • the screw rod is driven to rotate by a motor.
  • the screw rod is sleeved with a screw rod. Nut, the screw nut moves linearly on the screw rod with the rotation of the screw rod, and the pressing part 30 is connected to the screw nut through the connecting piece.
  • the first driving component is installed on the inner mold 10 , that is, the first driving part and the pressing part 30 are connected to the inner mold 10 and can move synchronously with the inner mold 10 .
  • the overall structure has strong integration.
  • the inner mold 10 When the shell 200 is replaced, the inner mold 10 When the casing 200 is removed, the pressing part 30 can be moved out simultaneously and away from the casing 200, thereby effectively preventing the pressing part 30 from interfering with the replacement of the casing 200; when the casing 200 is necked and flanged, the inner mold 10 synchronously drives the pressing.
  • the first driving component only needs to drive the pressing component 30 to move a preset distance compared to the inner mold 10, which is beneficial to reducing the driving force of the first driving component.
  • the stroke can simplify the structure of the overall necking and flanging device 100 and reduce material costs.
  • the pressing part 30 has a first surface 31 facing the constriction part 20 along the axial direction of the inner mold 10 , and the first surface 31 is a plane perpendicular to the axial direction of the inner mold 10 .
  • the first surface 31 is the surface that is in direct contact with the flange portion 220.
  • the first surface 31 is a plane, which can effectively ensure the flatness of the flange portion 220.
  • the first surface 31 is in contact with the axis of the inner mold 10. Vertically, it is convenient for the pressing member 30 to flatten and restrict the flange portion 220 on a plane extending along the radial direction of the inner mold 10 through the first surface 31 .
  • the surface of the flange portion 220 can be as close to a plane as possible, and the plane where the flange portion 220 is located can be close to the surface of the shell. 200 is vertical, thereby effectively improving the flatness of the flange portion 220 and the balance of the folding angles, and reducing the risk of springback of the flange portion 220 .
  • a plurality of necking members 20 are provided, and the plurality of necking members 20 are distributed along the circumferential direction of the inner mold 10 .
  • the number of the necking parts 20 can be two, three or even more, and the multiple necking parts 20 can be distributed at intervals along the circumference of the inner mold 10.
  • the necking parts 20 are provided with two Two necking parts 20 are evenly distributed along the circumferential direction of the inner mold 10 .
  • the plurality of necking parts 20 can also be fed in the radial direction of the inner mold 10 synchronously. In this way, the shell 200 is kept stationary and the multiple necking parts 20 are driven to revolve around the shell 200 or the shell 200 is driven to rotate. , the constriction portion 210 can be formed on the housing 200 .
  • all the necking parts 20 or part of the necking parts 20 act on the housing 200 synchronously.
  • such a structure is conducive to improving the necking efficiency of the housing 200.
  • multiple necking parts The neck piece 20 acts on the housing 200 synchronously along the circumferential direction of the housing 200, effectively improving the balance of the force on the housing 200 and reducing the risk of deformation of the housing 200 due to the force on one side of the housing 200.
  • the necking and flanging device 100 further includes a second driving assembly (not shown in the figure), and the second driving assembly is used to drive the necking member 20 to move in the radial direction of the inner mold 10 .
  • the second driving component is a component that can output a linear driving force to drive the constricting member 20 to move along the axial direction of the inner mold 10. Since the constricting member 20 is fed to the housing 200 through the second driving component, the constriction method is This is a conventional solution in the flanging process, so the second driving component will not be described in detail in this embodiment.
  • the second driving component may, but is not limited to, use a linear cylinder, a screw rod, a single-axis manipulator, etc.
  • the function of the necking member 20 to move in the radial direction of the inner mold 10 is realized by arranging the second driving assembly. That is, when the housing 200 is necked, the second driving assembly drives the necking member 20 to move in the radial direction of the housing 200 . In or out to form the constriction 210 on the housing 200 .
  • the necking member 20 is a necking roller
  • the necking and flanging device 100 further includes a third driving component (not shown in the figure).
  • the third driving component is used to drive the necking roller around the inner mold. 10 revolutions.
  • the third driving component is a component capable of outputting a rotational driving force to drive the necking member 20 to move circumferentially around the inner mold 10.
  • the third driving component may be, but is not limited to, a turntable, a ring gear, and other rotational driving components driven by a motor.
  • the scheme in which the necking member 20 is driven by the rotation drive mechanism to rotate around the housing 200 is a conventional scheme in the necking and flanging process, the third driving component will not be described in detail in this embodiment.
  • the necking part 20 adopts a necking roller.
  • the necking roller can rotate along its own central axis.
  • the third driving component drives the necking roller to revolve around the inner mold 10. That is, when the shell 200 is necked, the shell 200 and the inner mold 10 are rotated.
  • the mold 10 can remain stationary, and the third driving component drives the necking roller to revolve around the housing 200.
  • the radius of revolution gradually decreases, and the housing 200 is compressed and deformed along its own radial direction until it fits the inner mold 10 and shrinks.
  • Neck 210 Compared with the traditional structure in which the shell 200 rotates around its own central axis, it can effectively ensure the structural stability of the shell 200 during the necking process; at the same time, the shell 200 is stationary relative to the inner mold 10, which can effectively This avoids the problem of generating a large amount of metal chips due to relative sliding between the housing 200 and the inner mold 10 , thereby reducing the risk of short circuiting the electrode assembly due to metal chips falling into the inner cavity of the housing 200 .
  • the necking and flanging device 100 further includes a fixing mechanism 40 , which is disposed opposite the inner mold 10 along the axial direction of the inner mold 10 for fixing the shell 200 .
  • the fixing mechanism 40 is used to limit the movement of the casing 200.
  • the fixing mechanism 40 can use an openable and closable clamping mechanism to achieve detachable fixing of the casing 200.
  • the solution for fixing the casing 200 through the clamping mechanism is necking and turning. This is a conventional solution in edge processing, so the fixing mechanism 40 will not be described in detail in this embodiment.
  • the fixing mechanism 40 may include two oppositely arranged V-shaped blocks and two linear driving parts (such as linear cylinders). Each linear The driving end of the driving part is connected to a V-shaped block, and the two linear driving parts drive the two V-shaped blocks to move toward each other in the radial direction of the housing 200, so that the housing 200 can be clamped between the two V-shaped blocks. Two linear driving parts drive two V-shaped blocks to move away from each other in the radial direction of the housing 200, thereby releasing the clamping and positioning of the housing 200.
  • the necking and flanging device 100 fixes the housing 200 through the fixing mechanism 40, effectively ensuring the stability of the positioning of the housing 200 during the necking and flanging process.
  • the inner mold 10 has a gas channel 14 , and the gas channel 14 is used to introduce high-pressure gas into the housing 200 .
  • one end of the gas channel 14 is used to connect to the high-pressure gas source, and the other end of the gas channel 14 is connected to the inner cavity of the shell 200 to communicate into the shell 200. Enter high pressure gas.
  • the inner mold 10 extends into the open end of the shell 200, after the high-pressure gas passes into the shell 200, it can only be discharged from the shell 200 through the gap between the inner peripheral surface of the shell 200 and the outer peripheral surface of the inner mold 10.
  • the gas is discharged from the housing 200, a small amount of metal chips that may be generated during the fitting process of the inner peripheral surface of the housing 200 and the inner mold 10 can be directly brought out of the housing 200, thereby preventing the metal chips from falling into the inner cavity of the housing 200. And affect the battery performance.
  • the high-pressure gas is used to directly blow the metal chips that may be generated out of the housing 200 to prevent the metal chips from falling.
  • the structure is simple and the chip removal effect is outstanding.
  • the gas channel 14 penetrates the inner mold 10 along the axial direction of the inner mold 10.
  • the gas channel 14 penetrates the inner mold 10 along the axial direction of the inner mold 10 , which means that the gas channel 14 extends along the axial direction of the inner mold 10 and penetrates the inner mold 10 .
  • the central axis of the gas channel 14 and the central axis of the inner mold 10 may coincide with each other. They may be parallel. For example, in order to further improve the balance of the high-pressure gas discharged from the housing 200, the central axis of the gas channel 14 coincides with the central axis of the inner mold 10.
  • the high-pressure gas When high-pressure gas is introduced into the casing 200, the high-pressure gas enters the casing 200 downward along the axial direction of the casing 200, encounters the obstruction of the electrode assembly in the casing 200, rebounds and flows upward, passing through the inner mold 10 and the casing. The gap of 200 is punched upward, thereby fully blowing the metal chips that may be generated between the inner mold 10 and the shell 200 upward and out of the shell 200.
  • the gas channel 14 runs through the inner mold 10 along the axial direction of the inner mold 10 in a manner that effectively ensures high pressure. The flow rate and flow direction of the gas can give full play to its role in removing metal chips.
  • the necking and flanging device 100 includes an inner mold 10, a necking part 20, a pressing part 30, a first driving component, and a third The second driving assembly and the third driving assembly and the fixing mechanism 40.
  • the outer peripheral surface of the inner mold 10 includes a first outer peripheral surface 11, a second outer peripheral surface 12 and a transition surface 13.
  • the diameter of the first outer peripheral surface 11 is larger than that of the second outer peripheral surface 12.
  • diameter, the transition surface 13 connects the first outer peripheral surface 11 and the second outer peripheral surface 12 .
  • the necking part 20 is arranged around the inner mold 10.
  • the necking part 20 is a necking roller.
  • the four necking rollers are evenly distributed around the circumference of the inner mold 10.
  • the second driving assembly can drive The necking roller moves along the radial direction of the inner mold 10 .
  • the third driving component can drive the four necking rollers to revolve around the inner mold 10 .
  • the necking member 20 is used to cooperate with the second outer peripheral surface 12 to rotate on the housing 200
  • the necked portion 210 is formed.
  • the pressing member 30 is annularly sleeved on the first outer peripheral surface 11 of the inner mold 10.
  • the first driving assembly is installed on the inner mold 10.
  • the first driving assembly is used to drive the pressing member 30 to move along the axial direction of the inner mold 10.
  • the pressing part 30 has a first surface 31 facing the constriction part 20 along the axial direction of the inner mold 10 , and the first surface 31 is a plane perpendicular to the axial direction of the inner mold 10 .
  • the first surface 31 of the pressing member 30 cooperates with the necking roller to flatten the flange portion 220 of the housing 200 .
  • the fixing mechanism 40 is arranged opposite to the inner mold 10 along the axial direction of the inner mold 10 , and is used to fix the housing 200 .
  • the shell 200 is fixed by the fixing mechanism 40 so that the open end of the shell 200 faces the inner mold 10, and the inner mold 10 extends through the open end.
  • the first outer peripheral surface 11 of the inner mold 10 matches the inner peripheral surface of the shell 200.
  • the driving component drives the necking roller to feed along the radial direction of the housing 200 until it contacts the housing 200 .
  • the third driving component drives the necking roller to revolve around the housing 200 .
  • the second driving component drives the necking roller to move along the housing 200 .
  • the necking roller squeezes the shell 200, and the shell 200 is compressed and deformed until the necking portion 210 is in contact with the second outer peripheral surface of the inner mold 10. 12. During this process, the open end of the housing 200 is gradually everted along the connection between the first outer peripheral surface 11 and the second outer peripheral surface 12 to form a preliminary flange portion 220.
  • the first driving component drives the pressing member 30 to approach the necking roller along the axial direction of the inner mold 10 until the flange portion 220 is clamped and flattened between the necking roller and the pressing member 30 .
  • the pressing member 30 can flatten the flange portion 220 after the constriction portion 210 is completely formed, or can also gradually press down while the constriction portion 210 is formed (that is, during the formation process of the flange portion 220 ). , until the necking portion 210 is formed and the flange portion 220 is flattened between the pressing member 30 and the necking roller.
  • An embodiment of the present application also provides a battery manufacturing equipment, including the necking and flanging device 100 described in any of the above solutions.
  • the necking and flanging device 100 is used to neck and flange the battery case 200 .

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  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请提供一种缩颈翻边装置及电池制造设备，缩颈翻边装置包括：内模具；缩颈件，设置在所述内模具的周围，所述缩颈件沿所述内模具的径向可移动，所述缩颈件用于与所述内模具配合以在壳体上成型缩颈部；压合件，设置在所述内模具的周围，所述压合件沿所述内模具的轴向可移动，所述压合件用于与所述缩颈件配合以将所述壳体的翻边部压平；本申请的翻边装置有效提高壳体的翻边质量和翻边稳定性，有利于提高电池封装精度和良率。

Description

缩颈翻边装置及电池制造设备
相关申请的交叉引用
本申请要求享有2022年05月20日提交的名称为“缩颈翻边装置及电池制造设备”的中国专利申请(202221208401.2)的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池制造技术领域，具体而言，涉及一种缩颈翻边装置及用电设备。
背景技术
电池在圆柱电池生产中，采用卷封技术进行电池单体封装可有效提高封装速度，在进行卷封之前，需要对电池壳体进行缩颈翻边加工，即：将电极组件装入壳体后，通过缩颈件对壳体进行缩颈加工，壳体在缩颈部形成过程中，开口端逐渐向外翻折形成翻边部，翻边部与盖体通过卷封工艺连接，从而使得壳体的内腔形成封闭空间。
在一些情形下中，通过缩颈工艺形成的翻边部的翻边质量不均，严重影响封装精度和封装良率。
发明内容
本申请提供一种缩颈翻边装置及电池制造设备，该缩颈翻边装置结构整合性强，能够有效提高翻边部的翻边质量和翻边稳定性，从而有利于提高电池封装良率；该电池制造设备能够有效提高电池壳体的翻边质量和良率。
本申请的实施例是这样实现的：
第一方面，本申请提供一种缩颈翻边装置，包括：内模具；缩颈件，设置在内模具的周围，缩颈件沿内模具的径向可移动，缩颈件用于与内模具配合以在壳体上成型缩颈部；压合件，设置在内模具的周围，压合件沿内模具的轴向可移动，压合件用于与缩颈件配合以将壳体的翻边部压平。
上述技术方案中，缩颈翻边装置设置内模具、缩颈件和压合件，内模具用于经壳体的开口端探入壳体从壳体的内部支撑壳体，便于与缩颈件配合控制缩颈部的深度和精度，缩颈件设置于内模具的周围，用于作用于壳体的外周面，缩颈件可相对于内模具沿内模具的径向移动，即缩颈件可以相对于壳体沿壳体的径向进给，从而在壳体上成型缩颈部，在缩颈部成型过程中，壳体的缩颈部的直径减小，随着缩颈部的形 成，壳体的开口端向外翻折形成翻边部；压合件可沿内模具的轴向移动，翻边部形成后，压合件沿内模具轴向移动而靠近缩颈件，从而将翻边部压平在压合件和缩颈件之间。压合件的设置，便于对缩颈形成的翻边部进行整形压平，从而使得翻边部向外翻折的角度可控且更加均衡，有效提高翻边部的翻边质量；同时，压合件对形成的翻边部进行压平，有效提高翻边部翻折后的稳定性、降低翻边部回弹变形的风险，从而进一步提高翻边部的精度和结构稳定性；本申请的翻边装置有效提高壳体的翻边质量和翻边稳定性，有利于提高电池封装精度和良率。
根据本申请的一些实施例，压合件呈环状，压合件套设于内模具。
上述技术方案中，压合件呈环状，且套设于内模具，这样的设置有效保证压合件和翻边部的接触面积，使得整体翻边部沿壳体的周向受力更加均匀，进一步提高翻边部压平质量和压平均衡性、全面性。
根据本申请的一些实施例，内模具的外周面包括第一外周面、第二外周面和过渡面，第一外周面的直径大于第二外周面的直径，过渡面连接第一外周面和第二外周面，缩颈件用于与第二外周面配合，压合件套设于第一外周面。
上述技术方案中，第一外周面的直径大于第二外周面的直径，第一外周面用于与壳体的内周面贴合或小间隙配合，以在壳体进行缩颈时对壳体进行支撑，同时限定翻边部和缩颈部的衔接位置，第二外周面的直径小于第一外周面的直径，便于缩颈件相对于壳体且沿壳体的径向进给而在壳体上形成缩颈部。壳体的开口端受第一外周面和第二外周面的直径差影响，在第一外周面和第二外周面的连接处自然向外翻折而形成翻边部，而过渡面的设置使得翻边部的翻折处能够平滑过渡，避免壳体的翻折处因应力集中而使壳体产生疲劳裂纹甚至断裂的问题，从而保证壳体的结构强度。
根据本申请的一些实施例，压合件沿内模具的轴向可滑动地连接于内模具。
上述技术方案中，压合件沿内模具的轴向可滑动地连接于内模具，内模具对压合件起到支撑以及导向限位作用，从而有效提高压合件相对于内模具的轴向移动的稳定性，提高压合件压平翻边部时反向受力后的运动的稳定性，从而有效保证压合件对翻边部压平的稳定性。
根据本申请的一些实施例，缩颈翻边装置还包括：第一驱动组件，用于驱动压合件沿内模具的轴向移动。
上述技术方案中，第一驱动组件驱动压合件沿内模具的轴向移动，有效提高压合件沿内模具的轴向移动的操作便捷性和可控性。
根据本申请的一些实施例，第一驱动组件安装于内模具。
上述技术方案中，第一驱动组件安装于内模具，即第一驱动件和压合件连接于内模具可随内模具同步移动，整体结构的整合性强，在更换壳体时，内模具移出壳体时压合件可同步移出且远离壳体，从而有效避免压合件对壳体的更换造成干涉；壳体缩颈翻边时，内模具同步带动压合件靠近壳体，压合件对翻边部压平时，第一驱动组件驱动压合件相较于内模具移动预设距离即可，有利于降低第一驱动组件的驱动行程，便于简化整体缩颈翻边装置的结构、降低材料成本。
根据本申请的一些实施例，压合件具有沿内模具的轴向面向缩颈件的第一表 面，第一表面为与内模具的轴向垂直的平面。
上述技术方案中，压合件具有面向缩颈件的第一表面，第一表面垂直于内模具的轴向，第一表面作用于翻边部且对翻边部进行压平后，使得翻边部的表面能够尽可能趋近于平面，且翻边部所在平面能够趋近于与壳体的轴向垂直，从而有效提高翻边部的平整性和翻折角度的均衡性，降低翻边部回弹风险。
根据本申请的一些实施例，缩颈件设置有多个，多个缩颈件沿内模具的周向分布。
上述技术方案中，多个缩颈件沿内模具的周向分布，也就是说多个缩颈件可以作用于同一壳体的周向的不同位置，在进行缩颈加工时，全部缩颈件或部分个缩颈件可以同步作用于壳体，一方面，这样的结构有利于提高壳体的缩颈效率，另一方面，多个缩颈件沿壳体的周向作用于壳体，有效提高壳体受力的均衡性，降低因壳体单侧受力而造成壳体变形的风险。
根据本申请的一些实施例，缩颈翻边装置还包括：第二驱动组件，用于驱动缩颈件沿内模具的径向移动。
上述技术方案中，设置第二驱动组件驱动缩颈件沿内模具的径向移动，即在对壳体进行缩颈时，第二驱动组件驱动缩颈件沿壳体的径向进给或退出，以在壳体上成型缩颈部。
根据本申请的一些实施例，缩颈件为缩颈滚轮，缩颈翻边装置还包括：第三驱动组件，用于驱动缩颈滚轮绕内模具公转。
上述技术方案中，缩颈件采用缩颈滚轮，缩颈滚轮可沿自身的中心轴线旋转，第三驱动组件驱动缩颈滚轮绕内模具公转，即在对壳体进行缩颈时，壳体和内模具可以保持静止，第三驱动组件驱动缩颈滚轮绕壳体公转，公转过程中公转半径逐渐缩小，壳体受力沿自身径向压缩变形，直至与内模具贴合而成型缩颈部；缩颈滚轮在第三驱动组件的驱动下绕壳体公转，则壳体可以固定设置且与内模具保持静止状态，相较于传统的壳体绕自身中心轴线旋转的结构，可有效保证壳体在缩颈过程中的结构稳定性；同时，壳体相对于内模具静止，可有效避免因壳体和内模具相对滑动而产生大量金属屑的问题，从而降低因金属屑落入壳体内腔而造成电极组件短路的风险。
根据本申请的一些实施例，缩颈翻边装置还包括：固定机构，沿内模具的轴向与内模具相对设置，用于固定壳体。
上述技术方案中，缩颈翻边装置通过固定机构固定壳体，有效保证壳体在缩颈翻边加工过程中定位的稳定性。
根据本申请的一些实施例，内模具具有气体通道，气体通道用于向壳体内通入高压气体。
上述技术方案中，内模具具有气体通道，气体通道用于向壳体内通入高压气体，高压气体通入壳体后，只能经壳体的内周面与内模具的外周面之间的间隙排出壳体，在高压气体排出壳体的过程中，可将壳体的内周面与内模具贴合过程中可能产生的少量金属屑直接带出壳体，从而避免金属屑掉入壳体内腔而影响电池的使用性能。通过高压气体将可能产生的金属屑直接吹出壳体，避免金属屑下落，其结构简单，除 屑效果突出。
根据本申请的一些实施例，气体通道沿内模具的轴向贯穿内模具。
上述技术方案中，气体通道沿内模具的轴向贯穿内模具，当向壳体内通入高压气体时，高压气体沿壳体的轴向向下进入壳体，遇到壳体内的电极组件阻挡后反弹向上流动，经内模具和壳体的间隙向上冲出，从而充分将内模具和壳体之间可能产生的金属屑向上吹出壳体，气体通道沿内模具的轴向贯穿内模具的设置方式有效保证高压气体的流速和流向，从而充分发挥其去除金属屑的作用。
第二方面，本申请提供了一种电池制造设备，包括以上任一方案的缩颈翻边装置，缩颈翻边装置用于对电池壳体进行缩颈和翻边。
由于本申请第一方面实施例提出的缩颈翻边装置的特性，本申请第二方面实施例的电池制造设备能够有效提高翻边部的精度和结构稳定性，有利于提高电池封装精度和良率。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1为本申请一些实施例提供的成型有缩颈部和翻边部的壳体的结构示意图；
图2为本申请一些实施例提供的缩颈翻边装置的结构示意图；
图3为本申请一些实施例提供的缩颈翻边装置的俯视图；
图4为图3所示的A-A向的剖视图；
图5为图4所示的B部分的局部放大图；
图6为本申请一些实施例提供的缩颈翻边装置的内模具伸入壳体的状态示意图；
图7为图6所示的C部分的局部放大图；
图8为本申请一些实施例提供的缩颈翻边装置在壳体上成型缩颈部的状态示意图；
图9为图8所示的D部分的局部放大图；
图10为本申请一些实施例提供的缩颈翻边装置的压合件与缩颈件配合压平翻边部的状态示意图；
图11为图10所示的E部分的局部放大图；
在附图中，附图并未按照实际的比例绘制。
标记说明：100-缩颈翻边装置；10-内模具；11-第一外周面；12-第二外周面；13-过渡面；14-气体通道；15-避让口；16-连接轴；20-缩颈件；30-压合件；31-第一表面；32-连接部；40-固定机构；200-壳体；210-缩颈部；220-翻边部。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“设置”“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接、信号连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁， 在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请的实施例所提到的卷封是指封装的一种类型，用于刚性、半刚性容器的一种封口工艺，卷封又称卷边封，卷封是指将翻边的容器本体与容器盖的周边互相钩合、卷曲并压紧而使容器密封，卷封可用于铁容器、铝容器等金属容器或其他材质的刚性、半刚性容器。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体，箱体可以避免液体或其他异物影响电池单体的充电或放电。
其中，电池单体可以包括锂离子电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，也可以是一次电池或者二次电池，本申请实施例对此并不限定。
电池单体是指组成电池的最小单元，电池单体包括端盖、壳体和电极组件，壳体具有开口端，用于向壳体内装入电极组件、电解液及其他零部件，端盖是指盖合于壳体的开口端以将壳体的内部环境隔绝于外部环境的部件，壳体的材质可以有多种，比如铜、铁、铝等金属件。壳体和端盖可以采用卷边封工艺进行封装。
本申请发明人发现，电池单体卷边封装时误差较大，封装良率低。发明人经过研究发现，其原因在于电池单体的壳体在封装前的缩颈翻边工艺中形成的翻边部存在翻边量不均或翻边量不足的问题，另外，缩颈翻边工艺形成的翻边部的翻折角度容易因回弹变形而发生变化，进一步加重翻边量不均或不足的问题，翻边部的质量直接影响电池单体卷封精度和卷封良率。
基于此，为了解决壳体翻边质量低和翻边部稳定性差的问题，本申请发明人设计了一种缩颈翻边装置，缩颈翻边装置包括内模具、缩颈件和压合件，缩颈件设置在内模具的周围，缩颈件沿内模具的径向可移动，缩颈件用于与内模具配合以在壳体上成型缩颈部，压合件设置在内模具的周围，压合件沿内模具的轴向可移动，压合件用于与缩颈件配合以将壳体的翻边部压平。
在本申请技术方案中，缩颈件在壳体上成型缩颈部的过程中，壳体的缩颈部的直径减小，随着缩颈部的形成，壳体的开口端向外翻折形成翻边部，压合件在缩颈件缩颈过程中或缩颈完成后沿内模具的轴向移动而靠近缩颈件，使得翻边部形成在缩颈件和压合件之间，压合件的设置，便于对翻边部的形成起到导向以及整形压平作用，从而使得翻边部向外翻折的角度可控且更加均衡，有效提高翻边部的翻边质量；同时，压合件对形成的翻边部进行压平，有效提高翻边部翻折后的稳定性、降低翻边部回弹变形的风险，从而进一步提高翻边部的精度和结构稳定性；本申请的翻边装置通过有效提高壳体的翻边质量和翻边稳定性，以有效提高电池单体封装精度和良率。
本申请实施例公开的缩颈翻边装置可以但不限用于电池壳体、罐体、桶体等容器的缩颈翻边加工。为了描述简洁清楚，以下实施例均以缩颈翻边装置用于电池 壳体的缩颈翻边加工为例进行说明。
请参照图1至图6，图1为本申请一些实施例提供的成型有缩颈部和翻边部的壳体的结构示意图；图2为本申请一些实施例提供的缩颈翻边装置的结构示意图；图3为本申请一些实施例提供的缩颈翻边装置的俯视图；图4为图3所示的A-A向的剖视图；图5为图4所示的B部分的局部放大图；图6为本申请一些实施例提供的缩颈翻边装置的内模具伸入壳体的状态示意图。本申请一些实施例提供一种缩颈翻边装置100，包括内模具10、缩颈件20和压合件30，缩颈件20设置在内模具10的周围，缩颈件20沿内模具10的径向可移动，缩颈件20用于与内模具10配合以在壳体200上成型缩颈部210；压合件30设置在内模具10的周围，压合件30沿内模具10的轴向可移动，压合件30用于与缩颈件20配合以将壳体200的翻边部220压平。
如图1所示，缩颈部210为壳体200受力挤压变形而径向收缩的部位。翻边部220为壳体200因挤压变形形成缩颈部210时，壳体200的开口端向外弯折而形成的部位，翻边部220用于实现卷封。
如图4和图6所示，内模具10用于经壳体200的开口端探入壳体200以从壳体200的内部支撑壳体200，且对壳体200上最终成型的缩颈部210的深度起到限位作用，内模具10可以连接驱动机构，驱动机构驱动内模具10可沿其自身的轴向运动，以便于伸入壳体200或退出壳体200，当然，内模具10也可以位置固定，当内模具10位置固定时，将壳体200的开口端套设于内模具10即可。
其中，内模具10的轴向沿图4所示的X方向延伸,将缩颈翻边装置100应用于圆柱形电池的壳体200的缩颈翻边工艺时，内模具10的轴向沿壳体200的轴向延伸，内模具10的径向沿壳体200的径向延伸。
缩颈件20是指与内模具10配合以在壳体200上形成缩颈部210的部件，缩颈件20可以连接驱动机构，驱动机构驱动缩颈件20沿内模具10的径向移动，以使缩颈件20能够沿壳体200的径向进给而挤压壳体200，壳体200受力后沿自身的径向压缩变形，缩颈件20与内模具10配合对壳体200施力及限位，直至壳体200形成缩颈部210，同时，壳体200的开口端在缩颈过程中会逐步外翻而初步形成翻边部220。
在其他一些实施例中，缩颈件20也可以固定设置(即缩颈件20不沿壳体200的径向移动)，缩颈时，壳体200和内模具10同步沿内模具10的径向朝向缩颈件20进给，以使缩颈件20挤压壳体200。
缩颈件20可以采用缩颈滚刀、缩颈滚轮等常规缩颈件，缩颈件20挤压壳体200时，壳体200可以绕自身的中心轴线旋转，以使缩颈件20在壳体200上形成缩颈部210，当然，也可以使壳体200保持静止，缩颈件20绕壳体200的周向旋转。其中，壳体200和内模具10可以相对旋转或保持相对静止。
压合件30设置在内模具10的周围，压合件30可以采用多种实施结构，比如：压合件30可以包括多个子压合部，多个子压合部绕壳体200的周向间隔分布，每个子压合部均可单独沿内模具10的轴向移动。当然，压合件30也可以为一个整体结构，为了提高压合件30的压合面积，压合件30可以套设于内模具10的外围。压合件30的移动可以采用手动驱动也可以通过直线驱动机构驱动，比如，压合件30可以使用 丝杆、气缸等直线驱动件驱动移动。
请参照图7至图11，图7为图6所示的C部分的局部放大图，图8为本申请一些实施例提供的缩颈翻边装置在壳体上成型缩颈部的状态示意图，图9为图8所示的D部分的局部放大图，图10为本申请一些实施例提供的缩颈翻边装置的压合件与缩颈件配合压平翻边部的状态示意图，图11为图10所示的E部分的局部放大图。在缩颈部210成型过程中，壳体200的缩颈部210的直径逐渐减小，随着缩颈部210的形成，壳体200的开口端向外翻折初步形成翻边部220，在缩颈过程中或缩颈完成后，压合件30朝向缩颈件20沿内模具10的轴向移动，逐步将翻边部220夹紧在压合件30和缩颈件20之间，以将翻边部220压平。
压合件30的设置便于对缩颈形成的翻边部220进行整形压平，从而使得翻边部220向外翻折的角度可控且更加均衡，有效提高翻边部220的翻边质量；同时，有效提高翻边部220翻折后的稳定性、降低翻边部220回弹变形的风险，从而进一步提高翻边部220的精度和结构稳定性。
根据本申请的一些实施例，如图2所示，压合件30呈环状，压合件30套设于内模具10。
其中，压合件30可以为一体结构的环形件，也可以由至少两个分部拼合而成环状结构。
压合件30的内周面和内模具10的外周面之间可以具有一定间隙，也可以滑动配合。
压合件30的沿壳体200的径向的宽度可以大于翻边部220最终压平后的最大宽度，也可以小于翻边部220最终压平后的最大宽度，示例性的，压合件30的沿壳体200的径向的宽度大于翻边部220最终压平后的宽度，以有效增加压合件30与翻边部220的接触面积。
壳体200的开口端形成的翻边部220成环状，将压合件30同样设置为环状且套设于内模具10，便于压合件30能够对翻边部220沿其周向均衡施力，且有效保证翻边部220与压合件30的接触面积全面接触这样的设置有效保证压合件30和翻边部220的接触面积，使得整体翻边部220沿壳体200的周向受力更加均匀，进一步提高翻边部220的压平质量和压平均衡性及全面性。
根据本申请的一些实施例，请参照图6和图7，内模具10的外周面包括第一外周面11、第二外周面12和过渡面13，第一外周面11的直径大于第二外周面12的直径，过渡面13连接第一外周面11和第二外周面12，缩颈件20用于与第二外周面12配合，压合件30套设于第一外周面11。
如图7所示，第一外周面11沿壳体200的轴向更靠近壳体200的开口端，第一外周面11的直径可以与壳体200的内径相匹配，以使第一外周面11和壳体200的内周面抵接，第二外周面12的直径小于第一外周面11的直径，第二外周面12用于与缩颈件20配合在壳体200上形成缩颈部210，且在缩颈件20向壳体200施力使得壳体200的壁面抵接于第二外周面12过程中，壳体200的开口端能够沿第一外周面11和第二外周面12的连接处向外翻折变形而形成翻边部220。
第一外周面11的直径大于第二外周面12的直径，第一外周面11用于与壳体200的内周面贴合或小间隙配合，以在壳体200进行缩颈时对壳体200进行支撑，同时限定翻边部220和缩颈部210的衔接位置，第二外周面12的直径小于第一外周面11的直径，便于缩颈件20相对于壳体200且沿壳体200的径向进给而在壳体200上形成缩颈部210。壳体200的开口端受第一外周面11和第二外周面12的直径差影响，在第一外周面11和第二外周面12的连接处自然向外翻折而形成翻边部220，而过渡面13的设置使得翻边部220的翻折处能够平滑过渡，避免壳体200的翻折处因应力集中而使壳体200产生疲劳裂纹甚至断裂的问题，从而保证壳体200的结构强度。
在其他一些实施例中，如图6所示，内模具10的沿其轴向的端部具有避让口15，避让口15能够形成供电极组件伸入的避让空间，有效避免内模具10与电极组件(尤其是电极组件的极耳区)发生干涉。
根据本申请的一些实施例，压合件30沿内模具10的轴向可滑动地连接于内模具10。
内模具10和压合件30可通过导轨组件等结构可滑动地连接于内模具10，比如：可以在内模具10上设置沿内模具10的轴向延伸的导轨，在压合件30上设置与导轨配合的导槽，导轨穿设于导槽内使内模具10和压合件30滑动连接即可。当然，将导轨设置于压合件30，将导槽设置于内模具10亦可。
示例性的，请再次参照图4，内模具10可以包括与壳体200同轴的连接轴16，压合件30包括连接部32，连接部32套设于连接轴16与内模具10滑动连接。
压合件30沿内模具10的轴向可滑动地连接于内模具10，内模具10对压合件30起到支撑以及导向限位作用，有效提高压合件30相对于内模具10的轴向移动的稳定性，提高压合件30压平翻边部220时反向受力后的运动的稳定性，从而有效保证压合件30对翻边部220压平的稳定性。
根据本申请的一些实施例，缩颈翻边装置100还包括第一驱动组件(图中未示出)，第一驱动组件用于驱动压合件30沿内模具10的轴向移动。
第一驱动组件为能够输出直线驱动力，以驱动压合件30沿内模具10的轴向运动的组件，第一驱动组件可以但不限于使用直线气缸、丝杆、单轴机械手等，具有直线驱动功能即可，本申请实施例不对第一驱动组件进行赘述。
本申请实施例通过设置第一驱动组件实现压合件30沿内模具10的轴向移动的功能，有效提高压合件30沿内模具10的轴向移动的操作便捷性和可控性。
可以理解的是，第一驱动组件可以相对于内模具10单独设置，也可以直接安装于内模具10。
在本申请的一些实施例中，第一驱动组件安装于内模具10。
第一驱动组件在内模具10上的安装位置、安装方式可根据压合件30的设置结构进行灵活设置，达到驱动压合件30沿内模具10的轴向运动的目的即可。
示例性的，第一驱动组件可以使用丝杆螺母组件，丝杆安装在内模具10上，丝杆沿内模具10的轴向延伸，丝杆通过电机驱动旋转，丝杆上套设有丝杆螺母，丝杆螺母随丝杆的旋转在丝杆上直线移动，压合件30通过连接件与丝杆螺母连接。
第一驱动组件安装于内模具10，即第一驱动件和压合件30连接于内模具10可随内模具10同步移动，整体结构的整合性强，在更换壳体200时，内模具10移出壳体200时压合件30可同步移出且远离壳体200，从而有效避免压合件30对壳体200的更换造成干涉；壳体200缩颈翻边时，内模具10同步带动压合件30靠近壳体200，压合件30对翻边部220压平时，第一驱动组件驱动压合件30相较于内模具10移动预设距离即可，有利于降低第一驱动组件的驱动行程，便于简化整体缩颈翻边装置100的结构、降低材料成本。
根据本申请的一些实施例，压合件30具有沿内模具10的轴向面向缩颈件20的第一表面31，第一表面31为与内模具10的轴向垂直的平面。
如图11所示，第一表面31即为与翻边部220直接接触的表面，第一表面31为平面，能够有效保证翻边部220的平整性，第一表面31与内模具10的轴向垂直，便于压合件30通过第一表面31将翻边部220压平限位在沿内模具10的径向延伸的平面上。
第一表面31作用于翻边部220且对翻边部220进行压平后，使得翻边部220的表面能够尽可能趋近于平面，且翻边部220所在平面能够趋近于与壳体200的轴向垂直，从而有效提高翻边部220的平整性和翻折角度的均衡性，降低翻边部220回弹风险。
根据本申请的一些实施例，请再次参照图2和图4，缩颈件20设置有多个，多个缩颈件20沿内模具10的周向分布。
具体而言，缩颈件20的数量可以为两个、三个甚至更多个，多个缩颈件20可以沿内模具10的周向间隔分布，示例性的，缩颈件20设有两个，两个缩颈件20沿内模具10的周向均布。
可以理解的是，多个缩颈件20也可以同步沿内模具10的径向进给，这样，保持壳体200静止并驱动多个缩颈件20绕壳体200公转或驱动壳体200自转，即可在壳体200上形成缩颈部210。
在进行缩颈加工时，全部缩颈件20或部分个缩颈件20同步作用于壳体200，一方面，这样的结构有利于提高壳体200的缩颈效率，另一方面，多个缩颈件20沿壳体200的周向同步作用于壳体200，有效提高壳体200受力的均衡性，降低因壳体200单侧受力而造成壳体200变形的风险。
根据本申请的一些实施例，缩颈翻边装置100还包括第二驱动组件(图中未示出)，第二驱动组件用于驱动缩颈件20沿内模具10的径向移动。
第二驱动组件为能够输出直线驱动力、以驱动缩颈件20沿内模具10的轴向运动的组件，由于缩颈件20通过第二驱动组件实现向壳体200进给的方案为缩颈翻边工艺中的常规方案，故本实施例不对第二驱动组件进行赘述，示例性地，第二驱动组件可以但不限于使用直线气缸、丝杆、单轴机械手等。
通过设置第二驱动组件实现缩颈件20沿内模具10的径向移动的功能，即在对壳体200进行缩颈时，第二驱动组件驱动缩颈件20沿壳体200的径向进给或退出，以在壳体200上成型缩颈部210。
根据本申请的一些实施例，缩颈件20为缩颈滚轮，缩颈翻边装置100还包括第三驱动组件(图中未示出)，第三驱动组件用于驱动缩颈滚轮绕内模具10公转。
具体而言，缩颈滚轮的中心轴线沿内模具10的轴向延伸且可绕自身的中心轴线自转。第三驱动组件为能够输出旋转驱动力、以驱动缩颈件20绕内模具10的周向运动的部件，第三驱动件可以采用但不限于由电机驱动旋转的转盘、齿圈等旋转驱动组件，由于缩颈件20通过旋转驱动机构驱动而实现绕壳体200旋转的方案为缩颈翻边工艺中的常规方案，故本实施例不对第三驱动组件进行赘述。
缩颈件20采用缩颈滚轮，缩颈滚轮可沿自身的中心轴线旋转，第三驱动组件驱动缩颈滚轮绕内模具10公转，即在对壳体200进行缩颈时，壳体200和内模具10可以保持静止，第三驱动组件驱动缩颈滚轮绕壳体200公转，公转过程中公转半径逐渐缩小，壳体200受力沿自身径向压缩变形，直至与内模具10贴合而成型缩颈部210；相较于传统的壳体200绕自身中心轴线旋转的结构，可有效保证壳体200在缩颈过程中的结构稳定性；同时，壳体200相对于内模具10静止，可有效避免因壳体200和内模具10相对滑动而产生大量金属屑的问题，从而降低因金属屑落入壳体200内腔而造成电极组件短路的风险。
根据本申请的一些实施例，如图10所示，缩颈翻边装置100还包括固定机构40，固定机构40沿内模具10的轴向与内模具10相对设置，用于固定壳体200。
固定机构40用于限制壳体200移动，固定机构40可以采用可开合的夹持机构以实现壳体200的可拆卸固定，由于通过夹持机构实现壳体200的固定的方案为缩颈翻边工艺中的常规方案，故本实施例不对固定机构40进行赘述，示例性地，固定机构40可以包括两个相向设置的V型块和两个直线驱动件(比如直线气缸)，每个直线驱动件的驱动端连接一个V型块，两个直线驱动件驱动两个V型块沿壳体200的径向相向移动，即可将壳体200夹紧在两个V型块之间，两个两个直线驱动件驱动两个V型块沿壳体200的径向相背移动，即可释放对壳体200的夹持定位。
缩颈翻边装置100通过固定机构40固定壳体200，有效保证壳体200在缩颈翻边加工过程中定位的稳定性。
根据本申请的一些实施例，如图10所示，内模具10具有气体通道14，气体通道14用于向壳体200内通入高压气体。
可以理解的是，当内模具10伸入壳体200后，气体通道14的一端用于连接高压气源，气体通道14的另一端与壳体200的内腔连通，以向壳体200内通入高压气体。
因内模具10伸入壳体200的开口端，高压气体通入壳体200后，只能经壳体200的内周面与内模具10的外周面之间的间隙排出壳体200，在高压气体排出壳体200的过程中，可将壳体200的内周面与内模具10贴合过程中可能产生的少量金属屑直接带出壳体200，从而避免金属屑掉入壳体200内腔而影响电池的使用性能。通过高压气体将可能产生的金属屑直接吹出壳体200，避免金属屑下落，其结构简单，除屑效果突出。
根据本申请的一些实施例，气体通道14沿内模具10的轴向贯穿内模具 10。
气体通道14沿内模具10的轴向贯穿内模具10，是指气体通道14沿内模具10的轴向延伸并贯穿内模具10，气体通道14的中心轴线与内模具10的中心轴线可以重合也可以平行，示例性的，为了进一步提高高压气体排出的壳体200的均衡性，气体通道14的中心轴线与内模具10的中心轴线重合。
当向壳体200内通入高压气体时，高压气体沿壳体200的轴向向下进入壳体200，遇到壳体200内的电极组件阻挡后反弹向上流动，经内模具10和壳体200的间隙向上冲出，从而充分将内模具10和壳体200之间可能产生的金属屑向上吹出壳体200，气体通道14沿内模具10的轴向贯穿内模具10的设置方式有效保证高压气体的流速和流向，从而充分发挥其去除金属屑的作用。
请参照图2至图11，本申请一些实施例提供一种缩颈翻边装置100，缩颈翻边装置100包括内模具10、缩颈件20、压合件30、第一驱动组件、第二驱动组件和第三驱动组件和固定机构40，内模具10的外周面包括第一外周面11、第二外周面12和过渡面13，第一外周面11的直径大于第二外周面12的直径，过渡面13连接第一外周面11和第二外周面12。
缩颈件20设置在内模具10的周围，缩颈件20为缩颈滚轮，其中，缩颈滚轮设置有四个，四个缩颈滚轮绕内模具10的周向均布，第二驱动组件可以驱动缩颈滚轮沿内模具10的径向移动，同时，第三驱动组件可以驱动四个缩颈滚轮绕内模具10公转，缩颈件20用于与第二外周面12配合以在壳体200上成型缩颈部210。
压合件30呈环状套设于内模具10的第一外周面11，第一驱动组件安装于内模具10，第一驱动组件用于驱动压合件30沿内模具10的轴向移动，压合件30具有沿内模具10的轴向面向缩颈件20的第一表面31，第一表面31为与内模具10的轴向垂直的平面。压合件30的第一表面31与缩颈滚轮配合以将壳体200的翻边部220压平。
固定机构40沿内模具10的轴向与内模具10相对设置，固定机构40用于固定壳体200。
使用本申请的缩颈翻边装置100进行壳体200缩颈翻边时，通过固定机构40将壳体200固定，使壳体200的开口端朝向内模具10，内模具10经开口端伸入壳体200，内模具10的第一外周面11与壳体200的内周面匹配，此时压合件30的第一表面31与壳体200的开口端的端部之间具有间隙；第二驱动组件驱动缩颈滚轮沿壳体200的径向进给，直至与壳体200抵接，第三驱动组件驱动缩颈滚轮绕壳体200公转，同时第二驱动组件驱动缩颈滚轮沿壳体200的径向继续进给，使得缩颈滚轮的公转半径逐渐减小，缩颈滚轮挤压壳体200，壳体200受力压缩变形，直至缩颈部210与内模具10的第二外周面12贴合，在此过程中，壳体200的开口端沿第一外周面11和第二外周面12的衔接处逐步外翻，形成初步的翻边部220。
第一驱动组件驱动压合件30沿内模具10的轴向向缩颈滚轮靠近，直至将翻边部220夹紧压平在缩颈滚轮和压合件30之间。
可以理解的是，压合件30可以在缩颈部210完全形成后对翻边部220进行 压平，也可以在缩颈部210形成同时(也就是翻边部220形成过程中)逐步下压，直至缩颈部210成型且翻边部220压平在压合件30和缩颈滚轮之间。
本申请实施例还提供一种电池制造设备，包括以上任一方案所述的缩颈翻边装置100，缩颈翻边装置100用于对电池壳体200进行缩颈和翻边。
需要说明的是，在不冲突的情况下，本申请中的实施例中的特征可以相互结合。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (14)

  1. 一种缩颈翻边装置，其特征在于，包括：
    内模具；
    缩颈件，设置在所述内模具的周围，所述缩颈件沿所述内模具的径向可移动，所述缩颈件用于与所述内模具配合以在壳体上成型缩颈部；
    压合件，设置在所述内模具的周围，所述压合件沿所述内模具的轴向可移动，所述压合件用于与所述缩颈件配合以将所述壳体的翻边部压平。
  2. 根据权利要求1所述的缩颈翻边装置，其特征在于，所述压合件呈环状，所述压合件套设于所述内模具。
  3. 根据权利要求2所述的缩颈翻边装置，其特征在于，所述内模具的外周面包括第一外周面、第二外周面和过渡面，所述第一外周面的直径大于所述第二外周面的直径，所述过渡面连接所述第一外周面和所述第二外周面，所述缩颈件用于与所述第二外周面配合，所述压合件套设于所述第一外周面。
  4. 根据权利要求1-3中任一项所述的缩颈翻边装置，其特征在于，所述压合件沿所述内模具的轴向可滑动地连接于所述内模具。
  5. 根据权利要求1-4中任一项所述的缩颈翻边装置，其特征在于，所述缩颈翻边装置还包括：
    第一驱动组件，用于驱动所述压合件沿所述内模具的轴向移动。
  6. 根据权利要求5所述的缩颈翻边装置，其特征在于，所述第一驱动组件安装于所述内模具。
  7. 根据权利要求1-6中任一项所述的缩颈翻边装置，其特征在于，所述压合件具有沿所述内模具的轴向面向所述缩颈件的第一表面，所述第一表面为与所述内模具的轴向垂直的平面。
  8. 根据权利要求1-7中任一项所述的缩颈翻边装置，其特征在于，所述缩颈件设置有多个，多个所述缩颈件沿所述内模具的周向分布。
  9. 根据权利要求1-8中任一项所述的缩颈翻边装置，其特征在于，所述缩颈翻边装置还包括：
    第二驱动组件，用于驱动所述缩颈件沿所述内模具的径向移动。
  10. 根据权利要求1-9中任一项所述的缩颈翻边装置，其特征在于，所述缩颈件为缩颈滚轮，所述缩颈翻边装置还包括：
    第三驱动组件，用于驱动所述缩颈滚轮绕所述内模具公转。
  11. 根据权利要求1-10中任一项所述的缩颈翻边装置，其特征在于，所述缩颈翻边装置还包括：
    固定机构，沿所述内模具的轴向与所述内模具相对设置，用于固定所述壳体。
  12. 根据权利要求1至11任一项所述的缩颈翻边装置，其特征在于，所述内模具具有气体通道，所述气体通道用于向所述壳体内通入高压气体。
  13. 根据权利要求12所述的缩颈翻边装置，其特征在于，所述气体通道沿所述内 模具的轴向贯穿所述内模具。
  14. 一种电池制造设备，其特征在于，包括权利要求1至13任一项所述的缩颈翻边装置，所述缩颈翻边装置用于对电池壳体进行缩颈和翻边。
PCT/CN2022/104464 2022-05-20 2022-07-07 缩颈翻边装置及电池制造设备 WO2023221268A1 (zh)

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US3812696A (en) * 1970-10-22 1974-05-28 Crown Cork & Seal Co Method of and apparatus for forming container bodies
US4058998A (en) * 1976-08-31 1977-11-22 Metal Box Limited Containers
US4380165A (en) * 1980-05-29 1983-04-19 Thomassen & Drijver-Verblifa N.V. Squeezer flanger
EP0113248A2 (en) * 1982-12-30 1984-07-11 Mb Group Plc Forming necks on hollow bodies
EP0335602A1 (en) * 1988-03-30 1989-10-04 Advanced Composite Materials Corporation Whisker reinforced ceramic material working tools
CN213195387U (zh) * 2020-09-04 2021-05-14 陕西奥瑞金包装有限公司 一种铝箔易拉罐生产用缩翻模具

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812696A (en) * 1970-10-22 1974-05-28 Crown Cork & Seal Co Method of and apparatus for forming container bodies
US4058998A (en) * 1976-08-31 1977-11-22 Metal Box Limited Containers
US4380165A (en) * 1980-05-29 1983-04-19 Thomassen & Drijver-Verblifa N.V. Squeezer flanger
EP0113248A2 (en) * 1982-12-30 1984-07-11 Mb Group Plc Forming necks on hollow bodies
EP0335602A1 (en) * 1988-03-30 1989-10-04 Advanced Composite Materials Corporation Whisker reinforced ceramic material working tools
CN213195387U (zh) * 2020-09-04 2021-05-14 陕西奥瑞金包装有限公司 一种铝箔易拉罐生产用缩翻模具

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