WO2023216389A1 - 展平装置 - Google Patents

展平装置 Download PDF

Info

Publication number
WO2023216389A1
WO2023216389A1 PCT/CN2022/102209 CN2022102209W WO2023216389A1 WO 2023216389 A1 WO2023216389 A1 WO 2023216389A1 CN 2022102209 W CN2022102209 W CN 2022102209W WO 2023216389 A1 WO2023216389 A1 WO 2023216389A1
Authority
WO
WIPO (PCT)
Prior art keywords
main roller
sleeve
flattening device
pole piece
sleeves
Prior art date
Application number
PCT/CN2022/102209
Other languages
English (en)
French (fr)
Inventor
刘旭永
蒲晶晶
商红武
李世松
张盛武
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 WO2023216389A1 publication Critical patent/WO2023216389A1/zh

Links

Images

Classifications

    • 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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the present application relates to the field of battery technology, and in particular to a flattening device.
  • the battery is an important device for storing electrical energy.
  • the pole piece is an important part of the lithium battery. During production, the pole piece will be coated with a slurry containing electrode active materials on one or both sides, so that the pole piece is divided into coating films. area and a blank area (tab area), where the part coated with the electrode active material is the coating area, and the part not coated with the electrode active material is the blank area.
  • the pole pieces are prone to wrinkles during all manufacturing processes (coating, rolling, winding, etc.), which affects the quality of the pole pieces.
  • the embodiment of the present application provides a flattening device that can flatten the wrinkles of the pole piece and improve the efficiency of the pole piece.
  • the flattening device provided by the embodiment of the present application includes a main roller and a plurality of sleeves.
  • the plurality of sleeves are sleeved on the main roller at intervals along the axial direction of the main roller.
  • Each sleeve is detachably connected to the main roller, so that the sleeves
  • the position of the tube in the axial direction of the main roller is adjustable, and the sleeve is in contact with the pole piece to flatten the pole piece as it passes through the sleeve.
  • the casing is detachably connected to the main roller.
  • the main roller can be used alone to flatten the pole piece, or a casing can be set on the main roller for flattening.
  • the casing can both flatten the coating area and target the remaining areas.
  • White area flattening by setting multiple spaced sleeves along the axial direction of the main roller, it can be applied to pole pieces with multiple white areas and multiple coating areas, and multiple coating areas or white areas can be processed simultaneously. The distance between any two sleeves can be adjusted according to the width of the blank area or coating area to flatten different types of pole pieces. , improved compatibility with flattening devices.
  • At least two sleeves have different sizes along the axial direction, and the corresponding sleeves can be selected according to the width of the coating film area or blank area that needs to be flattened; and/or, at least two sleeves have different sizes.
  • the surface texture of the casing can be selected according to the specific wrinkle situation, which improves the scope of application of the flattening device.
  • the casing includes a casing body and a first protruding portion.
  • the casing body is sleeved on the main roller and is detachably connected to the main roller.
  • the first protruding portion protrudes from the outer surface of the casing body. The provision of the first protrusion can increase the friction between the sleeve and the pole piece to improve the flattening effect.
  • a plurality of first protrusions are provided, and the plurality of first protrusions are spaced apart along the circumference of the sleeve body.
  • the main roller drives the sleeve to rotate, since a plurality of first protrusions are provided at circumferential intervals, the plurality of first protrusions can be in contact with the pole pieces respectively, so that the pole pieces are stressed more evenly.
  • the first protrusion extends along the axial direction, and the contact area between the first protrusion and the pole piece is large, which can improve the wrinkle removal effect.
  • the extension direction of the first protrusion is inclined relative to the axial direction. If the height of the two sides of the pole piece along its own width direction is different, or the thickness of the coating area of the pole piece is inconsistent, it will cause offset during the movement of the pole piece.
  • the sleeve of the protruding part can not only achieve the effect of wrinkle removal and flattening, but also has a certain correction effect on the pole piece, so that the pole piece moves in the preset direction.
  • the extending direction of the first protrusion is inclined at an angle of 1° to 80° relative to the axial direction. If the extension direction of the first protrusion is tilted at an angle that is too small relative to the axial direction of the main roller, the correction effect will not be obvious; if the extension direction of the first protrusion is tilted at an angle that is too large with respect to the axial direction of the main roller, excessive correction may occur. Therefore, the tilt angle is selected from 1° to 80°, which can not only ensure the correction effect of the pole piece that has moved and deflected, but also avoid excessive correction and the pole piece will shift again.
  • the first protruding portion extends in a spiral shape, and the spiral first protruding portion also has direction guidance for the pole piece, which can achieve a correction effect.
  • the flattening device includes two sleeves, the extending directions of the first protruding portions of the two sleeves are arranged at an angle, and the two sleeves are respectively symmetrically sleeved on the main roller.
  • the first protruding parts of the two bushings have opposite inclination directions, and the first protruding parts of the two bushings exert opposite forces on the pole pieces, which can prevent the pole pieces from being deflected during movement, causing the pole pieces to move along the Move in preset direction.
  • the casing includes at least two convex arc segments distributed sequentially along the axial direction.
  • the outer surface of each arc segment is an arc surface with the same curvature.
  • the casing includes a first section and a second section distributed sequentially along the axial direction.
  • the first section and the second section are gradually expanded toward each other, and the casing is set in the middle of the main roller. area. Since the pole piece is relatively thin, during the movement of the pole piece, it is generally in a state where the sides of the pole piece are high and the middle is dented downward, which is prone to wrinkles.
  • the sleeve is set in the middle area of the main roller, corresponding to the middle direction of the pole piece. Because the sleeve has a shape with a high center and low ends, the sleeve can lift the recessed portion of the pole piece upward to avoid wrinkles in the pole piece.
  • the sleeve is an elastic sleeve.
  • the elastic sleeve not only has the advantage of being light in weight, but also has a certain degree of flexibility and can protect the pole pieces and avoid damage to the pole pieces.
  • the main roller includes a roller body and a plurality of second protrusions.
  • Each second protrusion protrudes from the outer surface of the roller body; the inner surface of the sleeve is provided with a second protrusion that snaps into place. Fitting grooves. Through the snap fit between the second protrusion and the groove, the casing can be set on the outer surface of the main roller, and the casing can slide relative to the main roller to adjust the position of the casing.
  • the flattening device further includes an expansion structure disposed between the main roller or the sleeve, and the main roller and the sleeve are detachably connected through the expansion structure.
  • an expansion structure disposed between the main roller or the sleeve, and the main roller and the sleeve are detachably connected through the expansion structure.
  • Figure 1 is a schematic structural diagram of a pole piece in some embodiments of the present application.
  • Figure 2 is a schematic structural diagram of a flattening device according to some embodiments of the present application.
  • Figure 3 is a schematic structural diagram of the main roller in some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of the main roller in other embodiments of the present application.
  • Figure 5 is a schematic structural diagram of a casing according to some embodiments of the present application.
  • Figure 6 is a schematic structural diagram of a casing according to other embodiments of the present application.
  • Figure 7 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Figure 8 is a schematic structural diagram of a flattening device according to other embodiments of the present application.
  • Figure 9 is a schematic structural diagram of a flattening device according to some further embodiments of the present application.
  • Figure 10 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Figure 11 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Figure 12 is a schematic structural diagram of a flattening device according to some further embodiments of the present application.
  • Figure 13 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Figure 14 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Figure 15 is a schematic structural diagram of a flattening device according to some further embodiments of the present application.
  • Figure 16 is a schematic structural diagram of a flattening device according to some further embodiments of the present application.
  • Figure 17 is a schematic structural diagram of the main roller in some embodiments of the present application.
  • Figure 18 is a schematic structural diagram of a casing in some embodiments of the present application.
  • Marking explanation flattening device 100; main roller 10; roller body 11; second protruding portion 12; casing 20; casing main body 21; first protruding portion 22; arc section 23; first section 24; Second section 25; groove 26; pole piece 30, coating area 31; blank area 32.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • Batteries such as lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, have high energy density, high power density, many cycles, and long storage time, etc. Advantages, it has been widely used in electrical devices suitable for batteries.
  • electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, and so on.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • the battery pole pieces need to go through processes such as coating, rolling, drying, and slitting.
  • the electrode piece will be coated with slurry containing electrode active material on one or both sides, so that the electrode piece is divided into a coating area and a blank area (tab area).
  • the part coated with electrode active material is The coating area and the part that is not coated with electrode active material are the blank areas.
  • the pole piece needs to pass through multiple process equipment from the unwinding device to the winding device. During this process, the pole piece wrinkles, which affects the normal progress of the pole piece forming process and reduces the finished product of the pole piece. Rate.
  • the pole pieces need to be flattened in time during the pole piece production process.
  • the inventor set up a pole piece flattening device at an appropriate position in the pole piece forming process (such as a location where wrinkles are prone to occur on the pole piece).
  • the friction force generated by the flattening device on the pole piece can eliminate the wrinkles formed on the pole piece. , ensuring the smooth progress of the pole piece forming process and effectively improving the yield of the pole piece.
  • the flattening device in the related art generally eliminates wrinkles caused by the shrinkage of the pole piece by pasting Teflon on the roller at the wrinkle removal position, and uses an arc-shaped flattening roller to eliminate wrinkles caused by stress concentration in the blank area.
  • the flattening roller can only flatten the pole pieces of the same model.
  • the wrinkle removal position on the flattening roller is fixed, but the width of the coating area and the blank area of different types of pole pieces are different. , the location where wrinkles need to be removed will also change, and it cannot be applied to different types of pole pieces.
  • the inventor designed a flattening device after in-depth research, by detachable the casing and the main roller.
  • the main roller can be used alone to flatten the pole piece, or a sleeve can be placed on the main roller to flatten the pole piece.
  • the sleeve can flatten the coating area or the blank area.
  • the axial position of the sleeve on the main roller can be adjusted, and multiple sleeves can be spaced along the axial direction of the main roller, which can be applied to applications with multiple blank areas and multiple coating films.
  • the pole piece in the area can flatten multiple coating areas or blank areas at the same time. Since the distance between any two casings is adjustable, the casings can be adjusted according to the width between the blank areas or coating areas. The distance between the pole pieces can be flattened for different models of pole pieces, thereby improving the compatibility of the flattening device.
  • the flattening device described in the embodiment of the present application is suitable for pole piece flattening devices and pole piece forming equipment using the pole piece flattening device.
  • the flattening device described in the embodiment of the present application can be, but is not limited to, used to flatten pole pieces, and can also be used to flatten other strips, such as isolation films.
  • Figure 1 is a schematic structural diagram of a pole piece 30 in some embodiments of the present application.
  • the pole piece 30 includes a coating film area 31 and a blank area 32 arranged at intervals.
  • the coating film area 31 is coated with electrode active material, and the blank area 32 is not coated. Covered electrode active material.
  • FIG. 2 is a schematic structural diagram of a flattening device 100 according to some embodiments of the present application.
  • the embodiment of the present application provides a flattening device 100, which includes a main roller 10 and a plurality of sleeves 20.
  • the plurality of sleeves 20 are sleeved on the main roller 10 at intervals along the axial direction of the main roller 10.
  • Each sleeve 20 is detachable.
  • Ground is connected to the main roller 10 so that the position of the sleeve 20 along the axial direction of the main roller 10 is adjustable.
  • the sleeve 20 contacts the pole piece 30 to flatten the pole piece 30 when the pole piece 30 passes through the sleeve 20.
  • the length of the main roller 10 is greater than the length of the casing 20.
  • the main roller 10 can be used as a driving roller with a servo motor, or it can be assembled separately as a driven roller.
  • the main roller 10 can rotate to drive the casing set on the main roller 10. 20 rotates, the pole piece 30 can contact the rotating sleeve 20 during the belt conveying process.
  • Figure 3 is a schematic structural diagram of the main roller 10 in some embodiments of the present application
  • Figure 4 is a schematic structural diagram of the main roller 10 in other embodiments of the present application.
  • the main roller 10 may be a cylindrical roller as shown in FIG. 3 or a prismatic roller as shown in FIG. 4 .
  • the main roller 10 can also be a curved roller.
  • the main roller 10 can be used alone to flatten the coating area 31 of the pole piece 30 .
  • the thickness of the coating area 31 is greater than the thickness of the blank area 32 .
  • the sleeve 20 is set on the outer peripheral side of the main roller 10 , so the sleeve 20 protrudes outward relative to the main roller 10 Therefore, the sleeve 20 can be flattened against the blank area 32 that is depressed relative to the coating film area 31 .
  • the sleeve 20 can also be used to flatten the coating film area 31 . Since the sleeves 20 can be disassembled at will, the fixed number and position of the sleeves 20 on the main roller 10 can be set as needed. If a blank area 32 or a coating area 31 needs to be wrinkle-removed and flattened, a sleeve 20 can be selected and installed on the main roller 10 .
  • pole pieces 30 have multiple blank areas 32 or coating areas 31
  • pole pieces 30 of different models have different widths of the blank areas 32 or coating areas 31 , resulting in two blank areas.
  • the spacing between 32 or the spacing between two coating film areas 31 is different. If multiple blank areas 32 or multiple coating film areas 31 need to be wrinkled, a corresponding number of sleeves 20 can be selected to be sleeved on the main roller 10 along the axial direction of the main roller 10 , and the sleeves 20 can be adjusted. The spacing between them is such that each sleeve 20 corresponds to the blank area 32 or the coating area 31 that needs to be wrinkled.
  • a plurality of sleeves 20 can also be continuously installed on the main roller 10 , that is, there is no spacing between the sleeves 20 , for flattening and wrinkle-removing the blank area 32 or the coating area 31 of the electrode piece 30 .
  • the main roller 10 by detachably connecting the sleeve 20 to the main roller 10, the main roller 10 can be used alone to flatten the pole piece 30, or the sleeve 20 can be placed on the main roller 10 to flatten the pole piece.
  • the sheet 30 is flattened, and the sleeve 20 can flatten the coating area 31 or the blank area 32.
  • the axial position of the sleeve 20 on the main roller 10 can be adjusted, and multiple sleeves 20 can be spaced along the axial direction of the main roller 10, which can be applied to applications with multiple blank areas 32. and the pole pieces 30 of multiple coating film areas 31 to simultaneously flatten multiple coating film areas 31 or blank areas 32.
  • the distance between any two sleeves 20 is adjustable, it can be adjusted according to the blank areas 32 or blank areas 32.
  • the width between the coating areas 31 and the distance between the sleeves 20 are adjusted to flatten the pole pieces 30 of different models, thus improving the compatibility of the flattening device 100 .
  • At least two sleeves 20 have different axial dimensions; and/or, at least two sleeves 20 have different surface textures.
  • At least two sleeves 20 differ in axial dimensions. Since the widths of different coating areas 31 or blank areas 32 on the same pole piece 30 are different, or the widths of the coating areas 31 or blank areas 32 of pole pieces 30 of different models are different, at least two bushings 20 The dimensions along the axial direction of the main roller 10 are different, that is, the lengths of at least two sleeves 20 are different. The sleeves 20 with corresponding lengths can be selected according to the specific width of the coating area 31 or the blank area 32, which improves the development. The applicable scope of the flat device 100.
  • FIG. 5 is a schematic structural diagram of the casing 20 according to some embodiments of the present application
  • FIG. 6 is a schematic structural diagram of the casing 20 according to other embodiments of the present application.
  • the casing 20 can be a cylindrical tube as shown in Figures 5 and 6, or an arc-shaped tube.
  • the outer surface of the casing 20 can be a smooth surface, or can be provided with texture to increase the distance between the casing 20 and the pole piece. 30% friction to improve wrinkle removal effect.
  • Different textures can correspond to different wrinkle situations. By setting the textures on the outer surfaces of at least two sleeves 20 to be different, the pole pieces 30 in different wrinkle situations can be flattened, which increases the applicable scope of the flattening device 100 .
  • At least two sleeves 20 have different sizes along the axial direction, and at least two sleeves 20 have different surface textures, which can develop coating film areas 31 or blank areas 32 of different widths. Flat, it can also be applied to different wrinkle removal situations and can meet different flattening needs.
  • FIG. 7 is a schematic structural diagram of the sleeve 20 in some embodiments of the present application.
  • the casing 20 includes a casing body 21 and a first protruding portion 22.
  • the casing body 21 is sleeved on the main roller 10 and is detachably connected to the main roller 10.
  • the first protruding portion 22 protrudes from the outside of the casing body 21. surface.
  • the inner wall of the casing body 21 is in contact with the outer wall of the main roller 10 to achieve the fixation of the casing 20.
  • the first protruding portion 22 protrudes outward relative to the casing body 21. When the pole piece 30 passes through the flattening device 100, the first protruding portion 22 protrudes outwards.
  • a protrusion 22 is in contact with the pole piece 30 .
  • the first protrusion 22 can be a point-like protrusion structure or a long rib structure. It can also be provided as a protruding curved surface on part of the outer surface of the casing main body 21 to form the first protrusion. portion 22 , or an indentation is provided on the outer surface of the sleeve 20 to form the first protruding portion 22 .
  • the provision of the first protruding portion 22 can increase the friction between the sleeve 20 and the pole piece 30 to improve the flattening effect.
  • a plurality of first protrusions 22 are provided, and the plurality of first protrusions 22 are arranged at intervals along the circumference of the sleeve body 21 .
  • the first protrusions 22 can be evenly spaced on the outer periphery of the casing body 21, and the spacing between the first protrusions 22 can be set as needed. A denser arrangement of the first protrusions 22 is more conducive to increasing the removal rate. wrinkle effect.
  • the first protruding portions 22 can also be detachably fixed to the sleeve body 21 to adjust the spacing between the first protruding portions 22 .
  • a groove 26 is provided on the outer surface of the casing body 21 , and the first protruding portion 22 is engaged with the groove 26 , so that the first protruding portion 22 slides in the groove 26 , and the first protruding portion 22 moves along the groove 26 .
  • the distance between the two first protrusions 22 can be adjusted, and the number of the first protrusions 22 on the sleeve body 21 can also be set as needed to adjust the sleeve 20 and the pole piece 30. friction between them.
  • the main roller 10 drives the sleeve 20 to rotate, since a plurality of first protrusions 22 are provided at circumferential intervals, the plurality of first protrusions 22 can be in contact with the pole pieces 30 respectively, which not only increases the size of the sleeve 20
  • the friction between the pole piece 30 and the pole piece 30 can also make the pole piece 30 receive a more uniform force, thereby improving the wrinkle-removing and flattening effect.
  • FIG. 8 is a schematic structural diagram of the flattening device 100 according to other embodiments of the present application.
  • the first protruding portion 22 extends along the axial direction.
  • the extending direction of the first protruding portion 22 is the same as the extending direction of the main roller 10 , that is, the first protruding portion 22 is a vertical rib structure extending along the axial direction of the main roller 10 .
  • the pole piece 30 is wrinkle-free and flattened, the axial direction of the main roller 10 is consistent with the width direction of the pole piece 30, and the contact area between the pole piece 30 and the first protruding portion 22 is large. Wrinkle removal can be achieved on any part that the protruding portion 22 contacts.
  • the contact area between the first protruding part 22 and the pole piece 30 is large, which can improve the wrinkle removal effect.
  • the extending direction of the first protruding part 22 is in contact with the pole piece 30
  • the advancing direction of the pole piece 30 is perpendicular, and the force exerted by the first protruding portion 22 on the pole piece 30 is the same as the moving direction of the pole piece 30 , thus preventing the pole piece 30 from being deflected.
  • FIG. 9 is a schematic structural diagram of the flattening device 100 in some embodiments of the present application.
  • the extending direction of the first protruding portion 22 is inclined relative to the axial direction.
  • the height of the two sides of the pole piece 30 along its width direction is different due to assembly reasons, or the thickness of the coating area 31 of the pole piece 30 is inconsistent, it will cause the pole piece 30 to shift during movement.
  • the right side of the pole piece 30 is higher than the left side of the pole piece 30 , and the pole piece 30 will deviate to the left during the belt conveying process.
  • the axial direction of the first protrusion 22 relative to the main roller 10 In the inclined sleeve 20 the first protruding portion 22 rotates clockwise at a certain angle relative to the axial direction.
  • the first protruding portion 22 can drive the pole piece 30 to shift to the right, so that the pole piece 30 can move to the right.
  • the piece 30 can move forward in a preset direction.
  • the inclination direction of the first protrusion 22 can be set arbitrarily, that is, the first protrusion 22 can either rotate clockwise at a certain angle relative to the axial direction of the main roller 10, or rotate counterclockwise at a certain angle relative to the axial direction of the main roller 10. Different tilt directions can achieve different direction correction effects.
  • the sleeve 20 using the first protruding portion 22 whose extension direction is inclined relative to the axial direction of the main roller 10 can not only increase the friction between the sleeve 20 and the pole piece 30, improve the wrinkle-removing and flattening effect, but also improve the
  • the pole piece 30 has a certain correction function, so that the pole piece 30 moves in a preset direction.
  • the extending direction of the first protruding portion 22 is inclined at an angle of 1° to 80° relative to the axial direction.
  • the tilt angle is selected from 1° to 80°, which can not only ensure the correction effect of the pole piece 30 that has moved and deflected, but also avoid the phenomenon of excessive correction and the pole piece 30 shifting again.
  • the first protruding portion 22 can also be arranged around the circumference of the main roller 10 , that is, the first protruding portion 22 is inclined at an angle of 90 degrees relative to the axial direction of the main roller 10 , which also has the advantage of increasing the third The friction between a protruding portion 22 and the pole piece 30 improves the wrinkle removal effect.
  • FIGS. 10 and 11 are schematic structural views of the sleeve 20 according to further embodiments of the present application.
  • the first protruding portion 22 extends in a spiral shape.
  • the helical shape here may be a partial helical structure, that is, a section of a complete helical structure, or it may be a complete helical structure wound around the outer peripheral side of the casing main body 21.
  • the spiral first protruding portion 22 also has direction guidance for the pole piece 30 and can achieve a correction effect.
  • FIG 12 is a schematic structural diagram of a flattening device 100 according to some embodiments of the present application.
  • the flattening device 100 includes two sleeves 20.
  • the extension directions of the first protruding portions 22 of the two sleeves 20 are arranged at an angle, and the two sleeves 20 are arranged at an angle.
  • Each sleeve 20 is symmetrically sleeved on the main roller 10 .
  • a sleeve 20 with an obliquely extending first protrusion 22 is placed on the main roller 10, which will cause the pole piece 30 to shift in a certain direction.
  • the pole piece 30 can be prevented from being offset.
  • the first protruding portion 22 can be placed at a symmetrical position on the other side of the main roller 10 with an inclination angle of 30 degrees. Casing 20 for -30 degrees.
  • the first protruding portions 22 of the two bushings 20 have opposite inclination directions, and the first protruding portions 22 of the two bushings 20 exert opposite forces on the pole pieces 30, which can prevent the pole pieces 30 from deflecting during movement. move so that the pole piece 30 moves in the preset direction.
  • Figure 13 is a schematic structural diagram of a casing 20 in some embodiments of the present application.
  • the casing 20 includes at least two protruding arc segments 23 distributed sequentially along the axial direction.
  • the outer surfaces of each arc segment 23 have the same curvature. arc surface.
  • the arc segments 23 can be arranged at intervals or continuously.
  • the arc segments 23 protrude outward. Multiple arc segments 23 protruding outward can increase the friction between the bushing 20 and the pole piece 30 force to improve the flattening effect.
  • FIG. 14 is a schematic structural diagram of the sleeve 20 in some embodiments of the present application
  • FIG. 15 is a schematic structural diagram of the flattening device 100 in some further embodiments of the present application.
  • the sleeve 20 includes a first section 24 and a second section 25 distributed sequentially along the axial direction. The first section 24 and the second section 25 are gradually expanded toward each other.
  • the sleeve 20 is sleeved on the main roller 10 middle area.
  • the outer diameter of the first section 24 gradually decreases in the direction away from the second section 25
  • the outer diameter of the second section 25 gradually decreases in the direction away from the first section 24 .
  • the outer surfaces of the first section 24 and the second section 25 can be configured as arc surfaces to better fit the pole piece 30 and facilitate contact with the pole piece 30 to achieve a wrinkle removal effect.
  • the pole piece 30 Since the pole piece 30 is relatively thin, during the movement of the pole piece 30, it is generally in a state where the sides are high and the middle is dented downward, which is prone to wrinkles.
  • the sleeve 20 is set in the middle area of the main roller 10, corresponding to the pole piece.
  • the middle of the pole piece 30 is concave downward, and the sleeve 20 is in a shape with a high middle and low ends, which can lift the concave portion of the pole piece 30 upward to avoid wrinkles in the pole piece 30 .
  • sleeve 20 is an elastic sleeve 20 .
  • the elastic sleeve 20 is made of elastic material, such as rubber, elastic polymer, etc.
  • the sleeve 20 may also be made of rigid materials such as stainless steel or aluminum.
  • the friction force of the sleeves 20 of different materials on the pole piece 30 is different, so the sleeves 20 of different materials can be selected for wrinkle removal according to the wrinkles of the pole piece 30 .
  • the elastic sleeve 20 not only has the advantage of being light in weight, but also has a certain degree of flexibility, which can protect the pole piece 30 and prevent the pole piece 30 from being damaged. Moreover, the friction of the elastic sleeve 20 is relatively large, which can improve the wrinkle removal effect.
  • Figure 16 is a schematic structural diagram of the flattening device 100 in some further embodiments of the present application
  • Figure 17 is a schematic structural diagram of the main roller 10 in some further embodiments of the present application
  • Figure 18 is a schematic structural diagram of the main roller 10 in some further embodiments of the present application
  • the main roller 10 includes a roller body 11 and a plurality of second protrusions 12. Each second protrusion 12 protrudes from the outer surface of the roller body 11; the inner surface of the sleeve 20 is provided with a The two protruding portions 12 snap into the matching grooves 26 .
  • the main roller 10 When the main roller 10 is a round roller or an arc roller, the main roller 10 can be used alone to remove wrinkles and flatten the pole piece 30.
  • a plurality of second protrusions 12 are provided on the outer surface of the roller body 11 to increase the diameter of the pole piece 30. The friction between the main roller 10 and the pole piece 30 improves the wrinkle removal effect.
  • the second protruding part 12 may be a point-like protruding structure, a long rib structure, or may be provided as a convex curved surface on part of the outer surface of the roller body 11 to form the second protruding part 12, or Indentations are provided on the outer surface of the roller body 11 to form the second protruding portion 12 .
  • the structure and shape of the second protruding part 12 can be set with reference to the first protruding part 22 in the above embodiment, and will not be described again here.
  • the groove 26 is also arranged to extend along the axial direction of the main roller 10, and the sleeve 20 can slide relative to the main roller 10 along the second protrusion 12, to change the position of the second protrusion 12 on the main roller 10 .
  • the main roller 10 can be used to simultaneously remove wrinkles from the coating area 31 of the entire pole piece 30 .
  • the sleeve 20 can be set on the outer surface of the main roller 10, and the sleeve 20 can slide relative to the main roller 10 to realize the position adjustment of the sleeve 20. .
  • the flattening device 100 further includes an expansion structure disposed between the main roller 10 or the sleeve 20 , and the main roller 10 and the sleeve 20 are detachably connected through the expansion structure.
  • the expansion structure can be provided on the outer wall of the main roller 10 or on the inner wall of the casing 20 .
  • the expansion structure can be an inflatable structure.
  • the main roller 10 can be regarded as an inflatable rotating shaft, that is, an inflatable tensioning portion is provided on the outer surface of the main roller 10.
  • the expansion structure expands, and then closely combines with the inner surface of the sleeve 20, so that the sleeve 20 is accurately fixed on the main roller 10; when the air is released, the expanded part shrinks, and the expansion structure contracts.
  • the sleeve 20 can be removed from the main roller 10 .
  • the expansion structure can also be a liquid-expansion structure. Liquid is injected into the expansion structure to cause the expansion structure to expand.
  • the main roller 10 can be regarded as a liquid expansion rotation axis, which is similar to the principle of the air expansion structure. Its specific working principle can be referred to the air expansion structure, which will not be discussed here. Repeat.
  • the sleeve 20 and the main roller 10 can be detachably fixed by means of screws, clamping, etc.
  • the casing 20 When the expansion structure expands, the casing 20 can be tightly sleeved on the main roller 10; when it is necessary to adjust the position of the casing 20 or disassemble the casing 20, it is only necessary to relieve the pressure of the expansion structure, so that the casing can be A gap is formed between 20 and the main roller 10, and the sleeve 20 is separated from the main roller 10.
  • the embodiment of the present application provides a flattening device 100, which includes a main roller 10 and a plurality of sleeves 20.
  • the plurality of sleeves 20 are sleeved on the main roller at intervals along the axial direction of the main roller 10. 10.
  • Each sleeve 20 is detachably connected to the main roller 10 so that the position of the sleeve 20 on the main roller 10 in the axial direction is adjustable.
  • the sleeve 20 is in contact with the pole piece 30 so that when the pole piece 30 passes through the sleeve 20 Flatten the pole piece 30.
  • the main roller 10 By detachably connecting the sleeve 20 to the main roller 10, the main roller 10 can be used alone to flatten the pole piece 30, or the sleeve 20 can be placed on the main roller 10 to flatten the pole piece 30.
  • the sleeve 20 The coating film area 31 can be flattened, and the blank area 32 can also be flattened.
  • the axial position of the sleeve 20 on the main roller 10 can be adjusted, and multiple sleeves 20 can be spaced along the axial direction of the main roller 10, which can be applied to applications with multiple blank areas 32. and the pole pieces 30 of multiple coating film areas 31 to simultaneously flatten multiple coating film areas 31 or blank areas 32.
  • the distance between any two sleeves 20 is adjustable, it can be adjusted according to the blank areas 32 or blank areas 32.
  • the width between the coating areas 31 and the distance between the sleeves 20 are adjusted to flatten the pole pieces 30 of different models, thus improving the compatibility of the flattening device 100 .
  • At least two sleeves 20 have different axial dimensions; and/or, at least two sleeves 20 have different surface textures.
  • the casing 20 with corresponding length and size can be selected according to the specific width of the coating area 31 or the blank area 32. Different textures can correspond to different wrinkle situations. By setting the textures on the outer surfaces of at least two casings 20 to be different, it is possible to The pole pieces 30 with different wrinkle conditions are flattened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

本申请实施例提供一种展平装置。展平装置包括主辊以及多个套管，多个套管沿主辊的轴向间隔地套设于主辊，各套管可拆卸地连接于主辊，以使套管在主辊沿轴向的位置可调，套管与极片接触以在极片经过套管时展平极片。

Description

展平装置
相关申请的交叉引用
本申请要求享有于2022年05月12日提交的名称为“展平装置”的中国专利申请202221128220.9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
本申请涉及电池技术领域，特别是涉及一种展平装置。
背景技术
电池是一种重要的储存电能的装置，极片是锂电池中重要的组成部分，极片在生产时会在其一面或两面涂布含有电极活性材料的浆料，使得极片分为涂膜区和留白区(极耳区)，其中，涂覆有电极活性材料的部分为涂膜区，未涂覆电极活性材料的部分为留白区。
极片在所有制程工序(涂布、辊压、卷绕等)走带过程中，容易出现褶皱，影响极片的优率。
发明内容
本申请实施例提供了一种展平装置，能够对极片的褶皱处进行展平，提高极片的优率。
本申请实施例提供的展平装置包括主辊以及多个套管，多个套管沿主辊的轴向间隔地套设于主辊，各套管可拆卸地连接于主辊，以使套管在主辊沿轴向的位置可调，套管与极片接触以在极片经过套管时展平极片。
通过套管对极片进行展平除皱，能够提高极片的优率。套管与主辊可拆卸连接，能够单独使用主辊对极片进行展平，也可以在主辊上套设套管进行展平，套管既可以对涂膜区展平，也可以针对留白区展平；通过沿主辊的轴向套设多个间隔的套管，能够应用于具有多个留白区和多个涂膜区的极片，同时对多个涂膜区或留白区进行展平，而且任意两个套管之间的距离可调，能够根据留白区或涂膜区之间的宽度，调节套管之间的距离，以针对不同型号的极片进行展平，提高了展平装置的兼容性。
在一些实施例中，至少两个套管沿轴向的尺寸不同，可根据需要展平的涂膜区或留白区的宽度选择对应的套管；和/或，至少两个套管具有不同的表面纹路，可根据具体的打皱情形选择对应的表面纹路的套管，提高了展平装置的适用范围。
在一些实施例中，套管包括套管主体和第一凸出部，套管主体套设于主辊并与主辊可拆卸连接，第一凸出部凸出于套管主体的外表面。第一凸出部的设置可以增大套管与极片之间的摩擦力，以提高展平效果。
在一些实施例中，第一凸出部设置为多个，多个第一凸出部沿套管主体的周向间隔设置。主辊带动套管转动时，由于在周向间隔设置有多个第一凸出部，能够使得多个第一凸出部分别与极片接触，极片的受力更均匀。
在一些实施例中，第一凸出部沿轴向延伸，第一凸出部与极片的接触面积大，能够提高除皱效果。
在一些实施例中，第一凸出部的延伸方向相对轴向倾斜。若极片沿自身宽度方向的两侧的高度具有差异，或者极片的涂膜区厚度不一致，会导致极片移动过程中产生偏移现象，采用延伸方向相对主辊的轴向倾斜的第一凸出部的套管，不仅能够实现除皱展平的效果，而且对极片具有一定的纠偏作用，以使极片沿预设方向移动。
在一些实施例中，第一凸出部的延伸方向相对轴向的倾斜的角度为1°～80°。若第一凸出部的延伸方向相对主辊轴向倾斜的角度太小，纠偏效果不明显；若第一凸出部的延伸方向相对主辊轴向倾斜的角度太大，可能造成纠偏过量的问题，因此选择倾斜角度为1°～80°，既能够保证对发生移动偏移的极片的纠偏效果，又能够避免纠偏过量，极片再次发生偏移的现象。
在一些实施例中，第一凸出部呈螺旋状延伸，螺旋状的第一凸出部对极片也具有方向引导性，能够实现纠偏效果。
在一些实施例中，展平装置包括两个套管，两个套管的第一凸出部的延伸方向呈角度设置，且两个套管分别对称套设于主辊。两个套管的第一凸出部的倾斜方向相反，两个套管的第一凸出部对极片的作用力刚好相反，能够避免极片在移动过程中发生偏移，使得极片沿预设方向移动。
在一些实施例中，套管包括沿轴向依次分布的至少两段凸出的圆弧段，各圆弧段的外表面为弯曲弧度相同的圆弧面，多段向外凸出的圆弧段能够提高套管与极片之间的摩擦力，提高展平效果。
在一些实施例中，套管包括沿轴向依次分布的第一段和第二段，第一段和第二段分别向靠近对方的方向呈渐扩设置，套管套设在主辊的中间区域。由于极片比较薄，因此极片在移动过程中，一般为两侧高中间向下凹陷的状态，容易出现褶皱现象，将该套管套设在主辊的中间区域，对应极片的中间向下凹陷的区域，由于该套管为中间高两端低的形状，套管能够将极片凹陷的部分向上抬起，避免极片发生褶皱现象。
在一些实施例中，套管为弹性套管，弹性套管不仅具有质量轻的优点，而且具有一定柔性，能够保护极片，避免极片被破坏。
在一些实施例中，主辊包括辊体和多个第二凸出部，各第二凸出部凸出于辊体的外表面；套管的内表面设置有与第二凸出部卡接配合的凹 槽。通过第二凸出部与凹槽的卡接配合，能够将套管套设在主辊的外表面，而且套管能够相对主辊滑动，以实现套管的位置调节。
在一些实施例中，展平装置还包括设置于主辊或套管之间的膨胀结构，主辊与套管通过膨胀结构可拆卸连接。通过膨胀结构发生膨胀，可将套管紧固地套设在主辊上；当需要调节套管的位置或拆卸套管时，只需对膨胀结构泄压，即可使得套管与主辊之间形成间隙，套管与主辊分开。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
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的极片的结构示意图；
图2为本申请一些实施例的展平装置的结构示意图；
图3为本申请一些实施例的主辊的结构示意图；
图4为本申请另一些实施例的主辊的结构示意图；
图5为本申请一些实施例的套管的结构示意图；
图6为本申请另一些实施例的套管的结构示意图；
图7为本申请又一些实施例的套管的结构示意图；
图8为本申请另一些实施例的展平装置的结构示意图；
图9为本申请又一些实施例的展平装置的结构示意图；
图10为本申请又一些实施例的套管的结构示意图；
图11为本申请又一些实施例的套管的结构示意图；
图12为本申请又一些实施例的展平装置的结构示意图；
图13为本申请又一些实施例的套管的结构示意图；
图14为本申请又一些实施例的套管的结构示意图；
图15为本申请又一些实施例的展平装置的结构示意图；
图16为本申请又一些实施例的展平装置的结构示意图；
图17为本申请又一些实施例的主辊的结构示意图；
图18为本申请又一些实施例的套管的结构示意图。
标记说明：展平装置100；主辊10；辊体11；第二凸出部12；套管20；套管主体21；第一凸出部22；圆弧段23；第一段24；第二段25；凹槽26；极片30，涂膜区31；留白区32。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，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的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确 的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
电池，例如锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，在适用于电池的用电装置中已普遍应用。例如，用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。
在电池的生产过程中，电池的极片需要经过涂布、辊压、干燥、分切等工序。极片在生产时会在其一面或两面涂布含有电极活性材料的浆料，使得极片分为涂膜区和留白区(极耳区)，其中，涂覆有电极活性材料的部分为涂膜区，未涂覆电极活性材料的部分为留白区。本发明人注意到，极片从放卷装置到收卷装置，中间需要经过多道工艺设备，在此过程中，极片产生褶皱，影响极片成型工艺的正常进行，降低了极片的成品率。为了缓解极片成型过程中出现褶皱的问题，在极片生产的过程中需及时对极片进行展平。发明人在极片成型工艺中的适当位置(如极片易产生褶皱的位置)，设置了一种极片展平装置，通过展平装置对极片产生的摩 擦力，消除极片上形成的褶皱，保证极片成型工艺的顺利进行，有效地提高了极片的成品率。
相关技术中的展平装置一般通过在除皱位置的过辊上粘贴铁氟龙消除极片收缩导致的褶皱，通过弧形展平辊消除留白区应力集中导致的褶皱。然而，发明人发现，而展平辊只能针对同一型号的极片展平，展平辊上的除皱位置是固定的，但是不同型号极片的涂膜区和留白区的宽度不相同，需要除皱的位置也会发生改变，无法适用于不同型号的极片。
为了解决由于展平装置的除皱位置无法改变，导致无法对不同型号的极片进行展平的问题，发明人经过深入研究，设计了一种展平装置，通过将套管与主辊可拆卸连接，能够单独使用主辊对极片进行展平，也可以在主辊上套设套管对极片进行展平，套管既可以对涂膜区展平，也可以对留白区展平。另一方面，套管在主辊上沿其轴向的位置可以调节，而且沿主辊的轴向可间隔套设有多个套管，能够应用于具有多个留白区和多个涂膜区的极片，同时对多个涂膜区或留白区进行展平，由于任意两个套管之间的距离可调，能够根据留白区或涂膜区之间的宽度，调节套管之间的距离，以针对不同型号的极片进行展平，从而提高了展平装置的兼容性。
本申请实施例描述的展平装置适用于极片展平装置以及使用极片展平装置的极片成型设备。
本申请实施例描述的展平装置可以但不限用于展平极片，还可以用于展平其它带材，例如隔离膜。
图1为本申请一些实施例的极片30的结构示意图，极片30包括间隔设置的涂膜区31和留白区32，涂膜区31涂覆有电极活性材料，留白区32未涂覆电极活性材料。
根据本申请的一些实施例，请参照图2，图2为本申请一些实施例的展平装置100的结构示意图。本申请实施例提供一种展平装置100，包括主辊10以及多个套管20，多个套管20沿主辊10的轴向间隔地套设于主辊10，各套管20可拆卸地连接于主辊10，以使套管20在主辊10沿轴向的位置可调，套管20与极片30接触以在极片30经过套管20时展平极片30。
主辊10的长度大于套管20的长度，主辊10可以与伺服电机作为主动辊，也可以单独装配作为从动辊，主辊10能够转动，以带动套设在主辊10上的套管20转动，极片30在走带过程中，能够与转动的套管20接触。
请参照图3和图4，图3为本申请一些实施例的主辊10的结构示意图，图4为本申请另一些实施例的主辊10的结构示意图。主辊10可为如图3所示的圆柱辊，也可以如为如图4所示的棱柱辊。当主辊10为棱柱辊时，能够避免套管20套设在主辊10的外周侧后相互转动。此外，主辊10还可以为弧形辊，当主辊10为圆柱辊或弧形辊时，可单独使用主辊10对极片30的涂膜区31进行展平。
由于涂膜区31涂覆有活性材料，因此涂膜区31的厚度大于留白区32的厚度，套管20套设在主辊10的外周侧，因此套管20相对主辊10向外凸出，套管20能够针对相对涂膜区31凹陷的留白区32进行展平。当然，也可以使用套管20对涂膜区31进行展平。由于套管20可任意拆卸，因此套管20在主辊10上固定的数量和位置均可以根据需要设置。若需要对一个留白区32或一个涂膜区31进行除皱展平，则选择一个套管20套设在主辊10上即可。
可以理解的是，有的极片30具有多个留白区32或涂膜区31，不同型号的极片30的留白区32或涂膜区31的宽度不同，则导致两个留白区32之间的间距或两个涂膜区31之间的间距不同。若需要对多个留白区32或多个涂膜区31进行除皱，则可选择对应数量的套管20沿主辊10的轴向套设在主辊10上，而且可调节套管20之间的间距，以使各个套管20对应需要除皱的留白区32或涂膜区31。
还可以在主辊10上连续套设多个套管20，即套管20之间没有间隔距离，用于对极片30的留白区32或涂膜区31展平除皱。
本申请实施例的技术方案中，通过将套管20与主辊10可拆卸连接，能够单独使用主辊10对极片30进行展平，也可以在主辊10上套设套管20对极片30进行展平，套管20既可以对涂膜区31展平，也可以对留白区32展平。另一方面，套管20在主辊10上沿其轴向的位置可以调 节，而且沿主辊10的轴向可间隔套设有多个套管20，能够应用于具有多个留白区32和多个涂膜区31的极片30，同时对多个涂膜区31或留白区32进行展平，由于任意两个套管20之间的距离可调，能够根据留白区32或涂膜区31之间的宽度，调节套管20之间的距离，以针对不同型号的极片30进行展平，从而提高了展平装置100的兼容性。
至少两个套管20沿轴向的尺寸不同；和/或，至少两个套管20具有不同的表面纹路。
在一些实施例中，至少两个套管20沿轴向的尺寸不同。由于同一极片30上的不同涂膜区31或留白区32的宽度具有差异，或者不同型号的极片30的涂膜区31或留白区32的宽度不同，将至少两个套管20沿主辊10轴向的尺寸设置的不同，即至少两个套管20的长度尺寸不同，可根据涂膜区31或留白区32具体的宽度选择对应长度尺寸的套管20，提高了展平装置100的适用范围。
在一些实施例中，至少两个套管20具有不同的表面纹路。图5为本申请一些实施例的套管20的结构示意图，图6为本申请另一些实施例的套管20的结构示意图。套管20可以为如图5和图6所示的圆柱管，也可以为弧形管，套管20的外表面可以为光滑面，也可以设置有纹路，以增大套管20与极片30之间的摩擦力，提高除皱效果。不同的纹路可以对应不同的褶皱情形，将至少两个套管20外表面的纹路设置为不同，可以对不同的褶皱情形的极片30进行展平，提高了展平装置100的适用范围。
在另一些实施例中，至少两个套管20沿轴向的尺寸不同，且至少两个套管20具有不同的表面纹路，既可以对不同宽度的涂膜区31或留白区32进行展平，也可以适用于不同情形的除皱情形，能满足不同的展平需求。
请参阅图7，图7为本申请又一些实施例的套管20的结构示意图。套管20包括套管主体21和第一凸出部22，套管主体21套设于主辊10并与主辊10可拆卸连接，第一凸出部22凸出于套管主体21的外表面。
套管主体21的内壁与主辊10的外壁接触，以实现套管20的固 定，第一凸出部22相对套管主体21向外凸出，当极片30经过展平装置100时，第一凸出部22与极片30接触。第一凸出部22可以为点状凸起结构，也可以为长条形的凸筋结构，还可以在套管主体21的外表面的部分设置为凸出的曲面，以形成第一凸出部22，或者在套管20的外表面设置凹痕，以形成第一凸出部22。
第一凸出部22的设置可以增大套管20与极片30之间的摩擦力，以提高展平效果。
在一些实施例中，第一凸出部22设置为多个，多个第一凸出部22沿套管主体21的周向间隔设置。
可将第一凸出部22均匀间隔地设置在套管主体21的外周，第一凸出部22之间的间距可根据需要设置，第一凸出部22排布较密更有利于增加除皱效果。第一凸出部22还能够可拆卸地固定于套管主体21，以调节第一凸出部22之间的间距。例如在套管主体21的外表面设置凹槽26，第一凸出部22与凹槽26卡接，以实现第一凸出部22在凹槽26中滑动，通过第一凸出部22沿着凹槽26滑动，能够调节两个第一凸出部22之间的距离，还能够根据需要设置第一凸出部22在套管主体21上的数量，以调节套管20与极片30之间的摩擦力。
主辊10带动套管20转动时，由于在周向间隔设置有多个第一凸出部22，能够使得多个第一凸出部22分别与极片30接触，不仅增大了套管20与极片30之间的摩擦力，还能使极片30的受力更均匀，提高了除皱展平效果。
图8为本申请另一些实施例的展平装置100的结构示意图，第一凸出部22沿轴向延伸。第一凸出部22的延伸方向与主辊10的延伸方向相同，即第一凸出部22为沿主辊10的轴向延伸的竖直凸筋结构。对极片30除皱展平时，主辊10的轴向与极片30的宽度方向一致，极片30与第一凸出部22的接触面积大，沿着极片30的宽度方向，与第一凸出部22接触的部分都可以实现除皱。
在本实施例中，第一凸出部22与极片30的接触面积大，能够提高除皱效果，而且极片30经过套管20时，第一凸出部22的延伸方向与极 片30的前进方向垂直，第一凸出部22对极片30的作用力与极片30的移动方向相同，能够避免极片30发生偏移的现象。
图9为本申请又一些实施例的展平装置100的结构示意图，第一凸出部22的延伸方向相对轴向倾斜。
若极片30由于装配原因，沿自身宽度方向的两侧的高度具有差异，或者极片30的涂膜区31厚度不一致，会导致极片30移动过程中产生偏移现象。例如极片30的右侧高于极片30的左侧，极片30在走带过程中，会向左发生路径偏移的现象，但是采用第一凸出部22相对主辊10的轴向倾斜的套管20，第一凸出部22相对轴向顺时针转动一定角度，极片30经过展平装置100时，第一凸出部22能够带动极片30向右偏移，以使极片30能够按照预设方向前行。第一凸出部22的倾斜方向可以任意设置，即第一凸出部22既可以相对主辊10的轴向顺时针转动一定角度，也可以相对主辊10的轴向逆时针转动一定角度，不同的倾斜方向能够实现不同方向的纠偏效果。
采用延伸方向相对主辊10的轴向倾斜的第一凸出部22的套管20，不仅能够增大套管20与极片30之间的摩擦力，提高除皱展平的效果，而且对极片30具有一定的纠偏作用，以使极片30沿预设方向移动。
在一些实施例中，第一凸出部22的延伸方向相对轴向的倾斜的角度为1°～80°。
若第一凸出部22的延伸方向相对主辊10轴向倾斜的角度太小，纠偏效果不明显；若第一凸出部22的延伸方向相对主辊10轴向倾斜的角度太大，可能造成纠偏过量的问题，因此选择倾斜角度为1°～80°，既能够保证对发生移动偏移的极片30的纠偏效果，又能够避免纠偏过量，极片30再次发生偏移的现象。
在其他实施例中，第一凸出部22还可以沿主辊10的周向环绕设置，即第一凸出部22相对主辊10的轴向倾斜的角度为90度，也具有增大第一凸出部22与极片30之间摩擦力，提高除皱效果的作用。
请参阅图10和图11，图10和图11分别为本申请又一些实施例的套管20的结构示意图，第一凸出部22呈螺旋状延伸。需要说明的是，此 处的螺旋状可以是部分螺旋结构，即完整螺旋结构的一段，也可以是完整的螺旋结构，缠绕在套管主体21的外周侧。
螺旋状的第一凸出部22对极片30也具有方向引导性，能够实现纠偏效果。
图12为本申请又一些实施例的展平装置100的结构示意图，展平装置100包括两个套管20，两个套管20的第一凸出部22的延伸方向呈角度设置，且两个套管20分别对称套设于主辊10。
如果极片30没有发生偏移现象，在主辊10上套设一个倾斜延伸的第一凸出部22的套管20，则会导致极片30向某一方向偏移，但是若再主辊10对称套设一个倾斜方向相反的第一凸出部22的套管20，则能避免极片30发生偏移的现象。例如在主辊10的一侧套设第一凸出部22倾斜角度为30度的套管20，则在主辊10的另一侧对称的位置处可套设第一凸出部22倾斜角度为-30度的套管20。
两个套管20的第一凸出部22的倾斜方向相反，两个套管20的第一凸出部22对极片30的作用力刚好相反，能够避免极片30在移动过程中发生偏移，使得极片30沿预设方向移动。
图13为本申请又一些实施例的套管20的结构示意图，套管20包括沿轴向依次分布的至少两段凸出的圆弧段23，各圆弧段23的外表面为弯曲弧度相同的圆弧面。
圆弧段23可以呈间隔排布，也可以为连续排布，圆弧段23向外凸出，多段向外凸出的圆弧段23能够增大套管20与极片30之间的摩擦力，提高展平效果。
请结合参阅图14和图15，图14为本申请又一些实施例的套管20的结构示意图，图15为本申请又一些实施例的展平装置100的结构示意图。套管20包括沿轴向依次分布的第一段24和第二段25，第一段24和第二段25分别向靠近对方的方向呈渐扩设置，套管20套设在主辊10的中间区域。
第一段24的外径向远离第二段25的方向逐渐减小，第二段25的外径向远离第一段24的方向逐渐减小。可将第一段24和第二段25的外 表面均设置为弧形面，以更贴合极片30，便于与极片30接触，以实现除皱效果。
由于极片30比较薄，因此极片30在移动过程中，一般为两侧高中间向下凹陷的状态，容易出现褶皱现象，将该套管20套设在主辊10的中间区域，对应极片30的中间向下凹陷的区域，而该套管20为中间高两端低的形状，能够将极片30凹陷的部分向上抬起，避免极片30发生褶皱现象。
在一些实施例中，套管20为弹性套管20。弹性套管20采用弹性材料制成，例如橡胶、弹性聚合物等。在其他实施例中，套管20也可以采用不锈钢、铝制等刚性材料。不同材料的套管20对极片30的摩擦力不同，因此可根据极片30的褶皱情形选择不同材料的套管20进行除皱。
弹性套管20不仅具有质量轻的优点，而且具有一定柔性，能够保护极片30，避免极片30被破坏，而且弹性套管20的摩擦力较大，能提高除皱效果。
请结合图16至图18，图16为本申请又一些实施例的展平装置100的结构示意图；图17为本申请又一些实施例的主辊10的结构示意图；图18为本申请又一些实施例的套管20的结构示意图。在一些实施例中，主辊10包括辊体11和多个第二凸出部12，各第二凸出部12凸出于辊体11的外表面；套管20的内表面设置有与第二凸出部12卡接配合的凹槽26。
当主辊10为圆形辊或弧形辊时，主辊10可以单独使用，以对极片30进行除皱展平，辊体11的外表面设置多个第二凸出部12，以增大主辊10与极片30之间的摩擦力，提高除皱效果。第二凸出部12可以为点状凸起结构、长条形的凸筋结构、还可以在辊体11的外表面的部分设置为凸出的曲面，以形成第二凸出部12，或者在辊体11的外表面设置凹痕，以形成第二凸出部12。第二凸出部12的结构和形状可参照上述实施例中第一凸出部22设置，在此不再赘述。当第二凸出部12沿主辊10的轴向延伸时，凹槽26也设置为沿主辊10的轴向延伸，套管20能够沿着第二凸出部12相对主辊10滑动，以改变第二凸出部12的在主辊10上的位置。
由于主辊10的长度较长，因此可采用主辊10对整个极片30的涂 膜区31同时进行除皱。通过第二凸出部12与凹槽26的卡接配合，能够将套管20套设在主辊10的外表面，而且套管20能够相对主辊10滑动，以实现套管20的位置调节。
在一些实施例中，展平装置100还包括设置于主辊10或套管20之间的膨胀结构，主辊10与套管20通过膨胀结构可拆卸连接。
膨胀结构可以设置为主辊10的外壁面上，也可以设置在套管20的内壁面上。膨胀结构可以为气胀结构，当气胀结构设置在主辊10的内壁面上时，主辊10可看作一个气胀旋转轴，即在主辊10的外表面上设置可充气涨紧部，当空气注入膨胀结构时，膨胀结构发生扩张，进而与套管20的内表面紧密结合，使得套管20精确地固定于主辊10上；当空气被放出时，扩张膨胀的部分收缩，便可从主辊10将套管20取出。
膨胀结构还可以为液胀结构，将液体注入膨胀结构，使得膨胀结构发生扩张。当液胀结构设置在主辊10的内壁面上时，主辊10可看作一个液胀旋转轴，与气胀结构的原理相似，其具体地工作原理可参考气胀结构，在此不再赘述。在其他实施例中，还可以通过螺钉、卡接等方式实现套管20与主辊10的可拆卸固定。
通过膨胀结构发生膨胀，可将套管20紧固地套设在主辊10上；当需要调节套管20的位置或拆卸套管20时，只需对膨胀结构泄压，即可使得套管20与主辊10之间形成间隙，套管20与主辊10分开。
根据本申请的一些实施例，本申请实施例提供一种展平装置100，包括主辊10以及多个套管20，多个套管20沿主辊10的轴向间隔地套设于主辊10，各套管20可拆卸地连接于主辊10，以使套管20在主辊10沿轴向的位置可调，套管20与极片30接触以在极片30经过套管20时展平极片30。通过将套管20与主辊10可拆卸连接，能够单独使用主辊10对极片30进行展平，也可以在主辊10上套设套管20对极片30进行展平，套管20既可以对涂膜区31展平，也可以对留白区32展平。另一方面，套管20在主辊10上沿其轴向的位置可以调节，而且沿主辊10的轴向可间隔套设有多个套管20，能够应用于具有多个留白区32和多个涂膜区31的极片30，同时对多个涂膜区31或留白区32进行展平，由于任意两个套 管20之间的距离可调，能够根据留白区32或涂膜区31之间的宽度，调节套管20之间的距离，以针对不同型号的极片30进行展平，从而提高了展平装置100的兼容性。至少两个套管20沿轴向的尺寸不同；和/或，至少两个套管20具有不同的表面纹路。可根据涂膜区31或留白区32具体的宽度选择对应长度尺寸的套管20，不同的纹路可以对应不同的褶皱情形，将至少两个套管20外表面的纹路设置为不同，可以对不同的褶皱情形的极片30进行展平。
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 (13)

  1. 一种展平装置，用于展平极片，所述展平装置包括：
    主辊；以及
    多个套管，沿所述主辊的轴向间隔地套设于所述主辊，各所述套管可拆卸地连接于所述主辊，以使所述套管在所述主辊沿所述轴向的位置可调，所述套管与所述极片接触以在所述极片经过所述套管时展平所述极片；至少两个所述套管沿所述轴向的尺寸不同；和/或至少两个所述套管具有不同的表面纹路。
  2. 根据权利要求1所述的展平装置，其中，所述套管包括套管主体和第一凸出部，所述套管主体套设于所述主辊并与所述主辊可拆卸连接，所述第一凸出部凸出于所述套管主体的外表面。
  3. 根据权利要求2所述的展平装置，其中，所述第一凸出部设置为多个，多个所述第一凸出部沿所述套管主体的周向间隔设置。
  4. 根据权利要求2所述的展平装置，其中，所述第一凸出部沿所述轴向延伸。
  5. 根据权利要求2所述的展平装置，其中，所述第一凸出部的延伸方向相对所述轴向倾斜。
  6. 根据权利要求5所述的展平装置，其中，所述第一凸出部的延伸方向相对所述轴向的倾斜的角度为1°～80°。
  7. 根据权利要求2所述的展平装置，其中，所述第一凸出部呈螺旋状延伸。
  8. 根据权利要求2所述的展平装置，包括两个套管，两个所述套管的第一凸出部的延伸方向呈角度设置，且两个所述套管分别对称套设于所述主辊。
  9. 根据权利要求1所述的展平装置，其中，所述套管包括沿所述轴向依次分布的至少两段凸出的圆弧段，各所述圆弧段的外表面为弯曲弧度相同的圆弧面。
  10. 根据权利要求1所述的展平装置，其中，所述套管包括沿所述轴向依次分布的第一段和第二段，所述第一段和第二段分别向靠近对方的方向呈渐扩设置，所述套管套设在所述主辊的中间区域。
  11. 根据权利要求1～10中任一项所述的展平装置，其中，所述套管为弹性套管。
  12. 根据权利要求1～10中任一项所述的展平装置，其中，所述主辊包括辊体和多个第二凸出部，各所述第二凸出部凸出于所述辊体的外表面；
    所述套管的内表面设置有与所述第二凸出部卡接配合的凹槽。
  13. 根据权利要求1～10中任一项所述的展平装置，还包括设置于主辊或套管之间的膨胀结构，所述主辊与套管通过所述膨胀结构可拆卸连接。
PCT/CN2022/102209 2022-05-12 2022-06-29 展平装置 WO2023216389A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202221128220.9U CN217086622U (zh) 2022-05-12 2022-05-12 展平装置
CN202221128220.9 2022-05-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/601,998 Continuation US20240207915A1 (en) 2022-05-12 2024-03-11 Flattening device

Publications (1)

Publication Number Publication Date
WO2023216389A1 true WO2023216389A1 (zh) 2023-11-16

Family

ID=82503937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/102209 WO2023216389A1 (zh) 2022-05-12 2022-06-29 展平装置

Country Status (2)

Country Link
CN (1) CN217086622U (zh)
WO (1) WO2023216389A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115475733A (zh) * 2022-09-13 2022-12-16 深圳市海目星激光智能装备股份有限公司 对涂装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204809311U (zh) * 2015-06-19 2015-11-25 宁德新能源科技有限公司 压辊及极片防皱装置
CN107068968A (zh) * 2017-03-30 2017-08-18 邢台海裕锂能电池设备有限公司 一种锂离子电池极片滚压(碾压)去皱褶设备
CN207695365U (zh) * 2017-11-23 2018-08-07 合肥国轩高科动力能源有限公司 一种锂电池辊压机用凸形展平辊
CN108405717A (zh) * 2018-04-02 2018-08-17 成都市银隆新能源有限公司 一种极片辊压装置
CN211545388U (zh) * 2019-12-30 2020-09-22 蜂巢能源科技有限公司 平展辊及其薄膜上料系统
KR20200121502A (ko) * 2019-04-16 2020-10-26 주식회사 엘지화학 전극시트 제조용 롤러조립체
CN212558741U (zh) * 2020-04-29 2021-02-19 蜂巢能源科技有限公司 除皱辊及其极片除皱辊组件
CN213150811U (zh) * 2020-09-17 2021-05-07 欣旺达电动汽车电池有限公司 辊压装置、极片辊压设备及锂电池生产线
CN215266365U (zh) * 2021-07-20 2021-12-21 星恒电源(滁州)有限公司 一种锂电池极片压辊
CN114348739A (zh) * 2021-12-08 2022-04-15 欣旺达电动汽车电池有限公司 防打皱装置及极片涂布烤箱

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204809311U (zh) * 2015-06-19 2015-11-25 宁德新能源科技有限公司 压辊及极片防皱装置
CN107068968A (zh) * 2017-03-30 2017-08-18 邢台海裕锂能电池设备有限公司 一种锂离子电池极片滚压(碾压)去皱褶设备
CN207695365U (zh) * 2017-11-23 2018-08-07 合肥国轩高科动力能源有限公司 一种锂电池辊压机用凸形展平辊
CN108405717A (zh) * 2018-04-02 2018-08-17 成都市银隆新能源有限公司 一种极片辊压装置
KR20200121502A (ko) * 2019-04-16 2020-10-26 주식회사 엘지화학 전극시트 제조용 롤러조립체
CN211545388U (zh) * 2019-12-30 2020-09-22 蜂巢能源科技有限公司 平展辊及其薄膜上料系统
CN212558741U (zh) * 2020-04-29 2021-02-19 蜂巢能源科技有限公司 除皱辊及其极片除皱辊组件
CN213150811U (zh) * 2020-09-17 2021-05-07 欣旺达电动汽车电池有限公司 辊压装置、极片辊压设备及锂电池生产线
CN215266365U (zh) * 2021-07-20 2021-12-21 星恒电源(滁州)有限公司 一种锂电池极片压辊
CN114348739A (zh) * 2021-12-08 2022-04-15 欣旺达电动汽车电池有限公司 防打皱装置及极片涂布烤箱

Also Published As

Publication number Publication date
CN217086622U (zh) 2022-07-29

Similar Documents

Publication Publication Date Title
EP3782737B1 (en) Slot die coater adjusting device for controlling distance between upper discharge port and lower discharge port of slot die coater, and electrode active material coating system including same
WO2023216389A1 (zh) 展平装置
EP1887641B1 (en) Method and device for applying electrode mix paste
KR102026126B1 (ko) 노칭 롤러를 포함하고 있는 전극 제조 장치
CN103443989B (zh) 用于制造果冻卷型电极组件的心轴
US9899707B2 (en) Rolling device for secondary battery
JP6478110B2 (ja) 電極の製造方法
JP6662245B2 (ja) 電極の製造装置
CN102501988B (zh) 一种探测载荷支撑用伸缩式空间伸杆机构
US10256499B2 (en) Apparatus for winding electrode assembly
EP4389299A1 (en) Apparatus and method for flow coating
TWI445228B (zh) 製備膠捲式電極組之心軸
JP2014096302A (ja) 電極ペースト塗工装置及び電極ペースト塗工方法
JP2016212981A (ja) セパレータ捲回体及びセパレータ捲回体の製造方法
US20240207915A1 (en) Flattening device
CN212402875U (zh) 展平机构及展平装置
WO2024060741A1 (zh) 切断装置及电池流水线生产设备
KR20070006247A (ko) 이차 전지용 권취장치
WO2023061369A1 (zh) 一种电池组件装配用设备
WO2023005502A1 (zh) 卷针套管、电池单体、电池、用电装置和卷绕装置
KR102197998B1 (ko) 이차전지용 권취장치
CN216175472U (zh) 极片展平装置及极片成型设备
WO2023093267A1 (zh) 极片成型设备
CN216728887U (zh) 一种除皱辊及极片除皱装置
US20230286764A1 (en) Conveying system and battery production system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22941335

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2022941335

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022941335

Country of ref document: EP

Effective date: 20240403