Non-coated portion pressing device and non-coated portion pressing method using the same

Abstract

The present invention relates to a non-existent area pressurizing device for pressurizing a non-existent area in which an active material layer is not formed in an electrode sheet, comprising: a conveying unit for unwinding and winding the electrode sheet; a roller unit including a first roller that presses one side of the non-existent area to form an uneven pattern and a second roller that is positioned to come into contact with the first roller with the non-existent area in between; a sensing unit for obtaining information on the uneven pattern; and a control unit that transmits a signal to move the electrode sheet along a set position from position information of the uneven pattern obtained from the sensing unit; and a method for pressurizing a non-existent area using the same.

Description

Technology Field

[0001] The present invention relates to a non-removable part pressurizing device and a non-removable part pressurizing method using the same, and more specifically, to a non-removable part pressurizing device for pressurizing a non-removable part of an electrode sheet and a non-removable part pressurizing method using the same. Background Technology

[0003] With the increasing technological development and demand for mobile devices, rechargeable secondary batteries are being used as an energy source for various mobile devices. Secondary batteries are also attracting attention as an energy source for electric vehicles and hybrid electric vehicles, which are being presented as alternatives to conventional gasoline and diesel vehicles that use fossil fuels.

[0004] Secondary batteries are classified according to the shape of the battery case into cylindrical and prismatic batteries, in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is embedded in a pouch-type case made of aluminum laminate sheet.

[0005] The electrode assembly can be manufactured into a monocell by stacking a separator between the anode and the cathode, and then stacking multiple such monocells and stacking a single half-cell on top to form a stack cell shape.

[0006] The electrode process for making these positive and negative electrodes includes a mixing process for mixing raw materials, a coating process for applying the mixed active material to an electrode current collector and drying it, and a rolling process for passing the electrode between two rolls to flatten and pressurize the active material.

[0007] FIG. 1 is a schematic diagram for explaining an electrode sheet rolling process according to the prior art, FIG. 2 is a cross-sectional view for explaining an electrode sheet rolling process according to the prior art, and FIG. 3 is a drawing for explaining an electrode sheet.

[0008] Referring to FIGS. 1 to 3, the rolling process can reduce the volume and increase the density of the electrode sheet (10) by rolling the electrode sheet (10) wound through the first conveying unit (1) between a pair of rolling rollers (3) and rolling the retaining unit (11) on both sides of the electrode sheet (10) on which an active material is coated.

[0009] Meanwhile, as the electrode sheet (10) is rolled at high pressure through a pair of rolling rollers (3), a problem may occur in which ripples form on the uncoated portion (12) where the active material is not coated and the process defect rate increases.

[0010] Therefore, to solve this, a technique is known to reduce the occurrence of swells by applying pressure to the uneven part (12) through a pair of uneven part rolling rollers (4) consisting of a first uneven part rolling roller (4a) having an uneven pattern formed thereon and a second uneven part rolling roller (4b) supporting the other side of the uneven part (12).

[0011] As described above, after the electrode sheet (10) is pressed through a pair of rolling rollers (3), the process of pressing the uncoated part through the uncoated part rolling roller (4) is continuously carried out, thereby allowing for the effect of reducing the occurrence of swells in the uncoated part (12).

[0012] However, if the position of the rolling roller (4) is misaligned due to various causes such as vibration caused by the rotation of the rolling roller (4), the rolling roller (4) may not be pressed, or the area of ​​the holding part (11) may be pressed again, resulting in problems such as failure to suppress wave generation or the holding part (11) not being flat, and thus the quality of the electrode sheet (10) deteriorates. Prior art literature

[0014] Korean Patent Publication No. 10-2021-0144586 The problem to be solved

[0015] To solve the above-mentioned problems, the present invention aims to provide a non-pressure device equipped with a function to correct the pressure position so that it is constant during the non-pressure process, and a non-pressure method using the same. means of solving the problem

[0017] As a technical means for achieving the above-mentioned purpose, a non-solid pressure device according to one embodiment of the present invention is a non-solid pressure device for applying pressure to a non-solid portion (12) in which an active material layer is not formed in an electrode sheet (10), and is characterized by comprising: a conveying unit (100) for unwinding and winding the electrode sheet (10); a roller unit (200) including a first roller (210) that applies pressure to one surface of the non-solid portion (12) to form an uneven pattern (P) and a second roller (220) that is positioned to come into contact with the first roller (210) with the non-solid portion (12) in between; a sensing unit (300) for obtaining information on the uneven pattern (P); and a control unit (400) that transmits a signal to move the roller unit (200) along a set position based on the information on the uneven pattern (P) obtained from the sensing unit (300).

[0018] In addition, in a pressure device for a non-removable portion according to one embodiment of the present invention, the first roller (210) is provided with a first irregularity (211) on its outer surface to form an irregularity pattern (P) on one surface of the non-removable portion (12), and the second roller (220) is provided to support the other surface of the non-removable portion (12).

[0019] In addition, in a pressure device for a non-insulating portion according to one embodiment of the present invention, the non-insulating portion (12) includes an insulating portion (12a) coated with an insulating material on the outside of a retaining portion (11) on which the active material layer is formed, and a non-insulating portion (12b) on the outside of the insulating portion (12a), and the roller portion (200) is driven to press a portion of the insulating portion (12a) and the non-insulating portion (12b).

[0020] In addition, in a pressure device for a non-displaying part according to one embodiment of the present invention, the sensing part (300) is characterized by including a first vision unit (310) that photographs one side of the non-displaying part (12).

[0021] In addition, in a pressure device for a non-removable part according to one embodiment of the present invention, the control unit (400) is characterized by controlling the roller unit (200) so that when one end of the uneven pattern (P) deviates from a preset range, the one end of the uneven pattern (P) corresponds to a preset range.

[0022] In addition, in a pressure device for a non-insulating part according to one embodiment of the present invention, the roller part (200) is characterized by having a width length capable of applying pressure to both the insulating part (12a) and the non-insulating part (12b) of the non-insulating part (12).

[0023] In addition, a method for applying pressure to a non-porous area using a non-porous area pressure device according to one embodiment of the present invention comprises: (S1) a step of unwinding the electrode sheet (10); (S2) a step of applying pressure to the non-porous area (12) of the electrode sheet (10) through the roller unit (200) to form the uneven pattern (P); (S3) a step of obtaining information on the uneven pattern (P) through the sensing unit (300); and a position correction step of adjusting the position of the roller unit (200) when the position of one end of the uneven pattern (P) deviates from a preset range based on the uneven pattern (P) information obtained in step (S3).

[0024] In addition, in a method for applying pressure to an uninsulated portion according to one embodiment of the present invention, the uninsulated portion (12) comprises an insulating portion (12a) coated with an insulating material on the outside of a retaining portion (11) on which the active material layer is formed, and a non-insulating portion (12b) on the outside of the insulating portion (12a), and the predetermined range is characterized as being a part of the insulating portion (12a).

[0025] In addition, in the method for applying pressure to a non-retaining portion according to one embodiment of the present invention, the preset range is characterized by being a range spaced apart from the other end of the retaining portion (11) by a first distance (a1) or more.

[0026] In addition, in the method for applying pressure to a non-retaining portion according to one embodiment of the present invention, the preset range is characterized by being a range spaced apart from the other end of the retaining portion (11) by a second distance (a2) or less.

[0027] In addition, in the method for applying pressure to a non-retaining portion according to one embodiment of the present invention, the preset range is characterized by being spaced apart from the other end of the retaining portion (11) by a first distance (a1) or more and spaced apart from the other end of the retaining portion (11) by a second distance (a2) or less. Effects of the invention

[0029] As described above, according to the uneven surface pressure device and the uneven surface pressure method using the same according to the present invention, a sensing unit capable of obtaining information on an uneven pattern formed on one surface of the uneven surface is provided, so that it is possible to check whether the roller unit forming the uneven pattern is driven at a set position.

[0030] In addition, according to the uneven surface pressure device and the uneven surface pressure method using the same according to the present invention, a control unit is provided to correct the position of the roller unit from the uneven surface pattern information obtained through the sensing unit, thereby preventing the quality of the electrode sheet from deteriorating. Brief explanation of the drawing

[0032] Figure 1 is a conceptual diagram illustrating an electrode sheet rolling process according to the prior art. FIG. 2 is a cross-sectional view illustrating an electrode sheet rolling process according to the prior art. Figure 3 is a drawing for explaining an electrode sheet. FIG. 4 is a conceptual diagram illustrating a pressure device for a non-restricted portion according to the present invention. FIG. 5 is a perspective view for explaining a non-restricted pressure device according to a first embodiment of the present invention. FIG. 6 is a top view of a non-restricted part pressurizing device according to the first embodiment of the present invention pressing a non-restricted part. Figure 7 is a diagram illustrating the appearance of an uneven pattern formed on an electrode sheet. FIG. 8 is an example for explaining the position correction of a roller part constituting a non-removable part pressurizing device according to the first embodiment of the present invention. FIG. 9 is another example for explaining the position correction of a roller part constituting a non-removable part pressure device according to the first embodiment of the present invention. FIG. 10 is a flowchart for explaining a method of applying pressure to a non-removable part using a non-removable part pressure device according to a first embodiment of the present invention. FIG. 11 is a perspective view for explaining a non-restricted pressure device according to a second embodiment of the present invention. Specific details for implementing the invention

[0033] Embodiments that enable a person skilled in the art to easily implement the present invention are described in detail below with reference to the attached drawings. However, in describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0034] In addition, the same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected, but also cases where they are indirectly connected with other elements in between. Furthermore, unless specifically stated otherwise, the inclusion of a certain component does not exclude other components but implies that additional components may be included.

[0036] Hereinafter, a pressure device for a non-removable part according to the present invention and a method for applying pressure to a non-removable part using the same will be described.

[0037] First, referring to FIG. 3, the electrode sheet (10) is configured to include a retaining portion (11) in which an active material layer is formed on an electrode current collector and a non-retaining portion (12) in which an active material layer is not formed. This electrode sheet (10) may be a positive electrode or a negative electrode.

[0038] When the electrode sheet (10) is a positive electrode, the positive current collector constituting the positive electrode is mainly made of aluminum material, and a slurry mixed with a positive electrode active material and a binder is applied to the positive current collector to form a retaining portion (11).

[0039] As cathode active materials, for example, layered compounds such as lithium cobalt oxide (LiCoO2) and lithium nickel oxide (LiNiO2), or compounds substituted with one or more transition metals; lithium manganese oxides such as Li1+xMn2-xO4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, and LiMnO2; lithium copper oxide (Li2CuO2); vanadium oxides such as LiV3O8, LiFe3O4, V2O5, and Cu2V2O7; and Ni-site type lithium nickel oxide represented by the chemical formula LiNi1-xMxO2 (where M = Co, Mn, Al, Cu, Fe, Mg, B, or Ga, and x = 0.01 to 0.3). Examples include lithium manganese complex oxides represented by the chemical formula LiMn2-xMxO2 (where M = Co, Ni, Fe, Cr, Zn or Ta and x = 0.01 to 0.1) or Li2Mn3MO8 (where M = Fe, Co, Ni, Cu or Zn); LiMn2O4 in which part of the Li of the chemical formula is substituted with alkaline earth metal ions; disulfide compounds; Fe2(MoO4)3, etc., but are not limited to these.

[0040] Also, when the electrode sheet (10) is a negative electrode, the negative current collector constituting the negative electrode is mainly made of copper material, and a slurry mixed with a negative active material and a binder is applied to this negative current collector to form a retaining portion (11). Examples of negative active materials include carbon such as non-graphitizable carbon, graphite-based carbon; LixFe2O3 (0≤x≤1), LixWO2 (0≤x≤1), SnxMe1-xMe'yOz (Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, elements of Group 1, Group 2, and Group 3 of the periodic table, halogen; 0 <x≤1; 1≤y≤3; 1≤z≤8) 등의 금속 복합 산화물; 리튬 금속; 리튬 합금; 규소계 합금; 주석계 합금; SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, Bi2O5 등의 금속 산화물; 폴리아세틸렌 등의 도전성 고분자; Li-Co-Ni계 재료; Si, SiO, SiO2 단독 또는 이들의 혼합물인 Si계 등을 사용할 수 있으나, 이들만으로 한정되는 것은 아니다.

[0041] Each of the positive current collector and the negative current collector has a retaining portion (11) coated with an active material and a non-retaining portion (12) not coated with an active material, and an electrode can be formed by notching the non-retaining portion (12).

[0042] The uninsulated portion (12) may include an insulating portion (12a) coated with an insulating material on the outside of the retaining portion (11) on which an active material layer is formed (9 o'clock direction in FIG. 3) and a non-insulating portion (12b) on the outside of the insulating portion (12a). The insulating portion (12a) may be located between the retaining portion (11) and the non-insulating portion (12b), which is an uninsulated portion not coated with an insulating material.

[0044] FIG. 4 is a conceptual diagram for explaining a non-restricted part pressure device according to the present invention, FIG. 5 is a perspective view for explaining a non-restricted part pressure device according to a first embodiment of the present invention, and FIG. 6 is a drawing viewed from above showing the non-restricted part pressure device according to the first embodiment of the present invention applying pressure to the non-restricted part.

[0045] Referring to FIGS. 3 to 6, the pressure device for a non-porous area according to the first embodiment of the present invention includes a transfer unit (100), a roller unit (200), a sensing unit (300), and a control unit (400), and can apply pressure to a non-porous area (12) on the aforementioned electrode sheet (10).

[0046] The transfer unit (100) may include a first transfer unit (110) for unwinding the electrode sheet (10) so as to transfer the electrode sheet (10) along the transfer direction (x-axis direction) and a second transfer unit (120) for winding the electrode sheet (10).

[0047] At this time, the transfer direction can be such that the electrode sheet (10) unwound from the first transfer unit (110) is wound by the second transfer unit (120) and transferred from the first transfer unit (110) to the second transfer unit (120).

[0048] The first transfer unit (110) and the second transfer unit (120) are configured in a roll shape so that the electrode sheet (10) is unwound or wound, and accordingly, the electrode sheet (10) can be transferred in a roll-to-roll manner.

[0049] The roller section (200) may include a first roller (210) located on one side of the bare section (12, 12 o'clock direction in FIG. 5) to roll and press at least a portion of the bare section (12), and a second roller (220) located on the other side of the bare section (12, 6 o'clock direction in FIG. 5).

[0050] The first roller (210) and the second roller (220) can be positioned to come into contact with each other with the uninsulated portion (12) in between. At this time, the first roller (210) and the second roller (220) can be driven to press a portion of the insulating portion (12a) and a non-insulating portion (12b) of the uninsulated portion (12).

[0051] The first roller (210) may be provided with a first protrusion (211) on its outer surface. The first protrusion (211) is formed to extend along the axial direction of the first roller (210) with respect to the outer surface of the first roller (210), and may be provided in multiple numbers spaced apart by a predetermined distance along the circumference of the first roller (210).

[0052] When the first roller (210) having the above configuration rolls and presses one side of the uneven portion (12), it can form an uneven pattern (P) on one side of the uneven portion (12) by means of the first unevenness (211).

[0053] Here, it is preferable that the first irregularities (211) be formed at a constant interval such that the spacing between each first irregularity (211) forming the irregularity pattern (P) is 0.5 mm or more and 2.0 mm or less. More preferably, the spacing between the first irregularities (211) can be spaced at 0.5 mm or more and 1.5 mm or less, and even more preferably, the spacing between the first irregularities (211) can be spaced at 0.8 mm or more and 1.0 mm or less.

[0054] If the spacing between each first protrusion (211) is less than 0.5 mm, the force applied to the electrode sheet (10) is weakened, making it difficult to obtain the effect of reducing ripples in the uneven portion (12). Conversely, if the spacing exceeds 2.0 mm, tearing or folding may occur in the uneven portion (12). Therefore, it is preferable that the first protrusion (211) be formed on the first roller (210) such that the spacing between each first protrusion (211) is 0.5 mm or more and 2.0 mm or less, more preferably 0.8 mm or more and 1.0 mm or less.

[0055] For example, when the first roller (210) is provided with a diameter of 40 mm, the width of the first irregularities (211) is provided with a width of approximately 1.9 mm, and the first irregularities (211) can be spaced apart with a spacing of approximately 0.9 mm. At this time, it is preferable that the first irregularities (211) be formed in a number of 40 or more and 50 or fewer (e.g., 45). The number of first irregularities (211) formed is the preferred number when the diameter of the first roller (210) is 40 mm, and when the first roller (210) is provided with a diameter of various sizes, it is preferable that the first irregularities (211) be formed in a number such that the spacing between them can be spaced from 0.5 mm to 2.0 mm.

[0056] The second roller (220) may be positioned on the other side of the unsupported portion (12) to support the other side of the unsupported portion (12). Here, the second roller (220) may be in the form of a roller without any irregularities formed on its outer surface.

[0057] The first roller (210) and the second roller (220) are provided to have different materials, and the first roller (210) may be provided with a material having a higher hardness than the second roller (220). For example, the first roller (210) may be formed of high-strength and high-hardness engineering plastic, and the second roller (220) may be formed of a plastic or rubber material having relatively lower hardness.

[0058] Accordingly, the first roller (210) has a higher hardness than the second roller (220), so when the first roller (210) and the second roller (220) come into contact with each other with the uneven portion (12) in between and press the uneven portion (12), the first irregularity (211) provided on the first roller (210) can press a part of the second roller (220) and form an irregularity pattern (P) on the uneven portion (12).

[0059] The uneven pattern (P) can be formed by being pressed by the first unevenness (211) of the first roller (210), so that it can be formed in a shape with repeating peaks and valleys.

[0060] The roller section (200) may have a width that presses a portion of the non-insulated section (12b) and the insulating section (12a) of the uninsulated section (12), and more preferably, may have a width that presses both the insulating section (12a) and the non-insulated section (12b) of the uninsulated section (12). That is, the roller section (200) may have a width that corresponds to or greater than the width of the uninsulated section (12).

[0062] FIG. 7 is a drawing for explaining the appearance of an uneven pattern formed on an electrode sheet, FIG. 8 is an example for explaining the position correction of a roller part constituting a non-removable part pressing device according to the first embodiment of the present invention, and FIG. 9 is another example for explaining the position correction of a roller part constituting a non-removable part pressing device according to the first embodiment of the present invention.

[0063] Referring to FIGS. 3 to 9, the sensing unit (300) may be configured to obtain information on an uneven pattern (P) formed by the roller unit (200).

[0064] The sensing unit (300) may include a first vision unit (310) that photographs one side of the blank area (12) to obtain information on an uneven pattern (P) formed on one side of the blank area (12). At this time, the first vision unit (310) may be located near the first roller (210) and photograph one side of the electrode sheet (10) that has passed through the roller unit (200).

[0065] In other words, the first vision unit (310) can capture an uneven pattern (P) formed by the roller unit (200) and can transmit the obtained uneven pattern (P) information to the control unit (400).

[0066] Additionally, the sensing unit (300) may further include a second vision unit (not shown) that photographs the other side of the blank area (12) to obtain more accurate information. This second vision unit (not shown) may be provided to photograph the uneven pattern (P) formed by applying pressure from the other side to obtain double information about the uneven pattern (P).

[0067] To briefly explain the method by which the sensing unit (300) captures the uneven pattern (P) and obtains position information of the uneven pattern (P), the sensing unit (300) may obtain position information in the y-axis direction or rotation information based on the z-axis of the uneven pattern (P) and provide the obtained information to the control unit (400). Here, the rotation information based on the z-axis of the uneven pattern (P) is angle information in which the uneven pattern (P) is rotated with respect to one surface (xy surface) of the uneven part (12).

[0068] The control unit (400) can transmit a signal to the roller unit (200) so that the roller unit (200) moves along a set position from the uneven pattern (P) information obtained from the sensing unit (300). At this time, the information provided to the control unit (400) by the sensing unit (300) may be y-axis direction position information and / or z-axis reference rotation information of the uneven pattern (P) formed on one surface of the blank area (12) captured by the first vision unit (310).

[0069] The control unit (400) can determine whether one end of the uneven pattern (P) (3 o'clock direction in Fig. 7) is located within a preset range through information of the obtained uneven pattern (P). Here, the preset range is a range separated by a first distance (a1) or more from the other end of the retaining unit (11) and separated by a second distance (a2) or less from the other end of the retaining unit (11).

[0070] In other words, the control unit (400) can determine whether one end of the uneven pattern (P) is located within a range greater than or equal to a first distance (a1) and less than or equal to a second distance (a2) from the other end of the retaining unit (11).

[0071] At this time, a position separated by a first distance (a1) from the other end of the retaining part (11) and a position separated by a second distance (a2) are located within the insulating part (12a), and it is preferable that the position separated by the second distance (a2) is located further from the other end of the retaining part (11) than the position separated by the first distance (a1).

[0072] The control unit (400) can control the position of the roller unit (200) by transmitting a signal to the roller unit (200) so that when one end of the uneven pattern (P) deviates from a preset range, the one end of the uneven pattern (P) corresponds to a preset range.

[0073] For example, referring to FIG. 8, the control unit (400) can determine that one end of the uneven pattern (P) has moved out of a preset range when it is positioned at a distance of more than a second distance (a2) from the other end of the retaining unit (11). At this time, the control unit (400) can control the position of the roller unit (200) by transmitting a signal to the roller unit (200) so that the position of one end of the first uneven pattern (211) is positioned at a distance of less than or equal to the second distance (a2).

[0074] Additionally, for example, the control unit (400) may determine that one end of the uneven pattern (P) has moved out of a preset range when it is positioned at a distance (a1) or less from the other end of the retaining unit (11). At this time, the control unit (400) may control the position of the roller unit (200) by transmitting a signal to the roller unit (200) so that the position of one end of the first uneven pattern (211) is positioned at a distance (a1) or greater.

[0075] By controlling the y-axis position of the roller part (200) of the control part (400), one end of the uneven pattern (P) can be corrected to correspond to a preset range.

[0076] Also, referring to FIG. 9, the control unit (400) can determine whether the uneven pattern (P) has been rotated based on the z-axis of the uneven pattern (P) through information of the uneven pattern (P). When the uneven pattern (P) deviates from a preset angle range, the control unit can control the rotation angle of the roller unit (200) by transmitting a signal to the roller unit (200) so that the angle of the uneven pattern (P) corresponds to the preset angle range. Here, the preset angle range is a range in which the angle of rotation of the uneven pattern (P) from the y-axis is greater than or equal to a° and less than or equal to b°. For example, the preset angle range may be a range of -5° or greater and 5° or less.

[0077] For example, the control unit (400) may determine that the uneven pattern (P) has moved out of the preset angle range when the angle of the uneven pattern (P) is rotated beyond the preset angle range. At this time, the control unit (400) may transmit a signal to the roller unit (200) so that the uneven pattern (P) is positioned within the preset angle range, thereby rotating the roller unit (200) around the z-axis.

[0078] The control unit (400) can determine the position of the uneven pattern (P) detected through the information obtained through the sensing unit (300) and adjust the position of the roller unit (200), and can also perform overall control so that each component of the uneven pressure device according to the present invention can perform its function normally.

[0079] This control unit (400) may be implemented in the form of hardware or software, or may be implemented in a combined form of hardware and software. The control unit may be implemented in the form of a computing device (computation device) such as a microprocessor, but is not limited thereto and may be implemented in various forms that are obvious to those skilled in the art.

[0080] Additionally, the control unit (400) can determine the information obtained through the sensing unit (300) in real time and transmit a signal indicating an abnormal position of the roller unit (200) to the operator, and can display such a signal on an equipment monitor (e.g., a display unit) or transmit it to the operator's terminal (e.g., a mobile phone).

[0081] Meanwhile, the roller section (200) that presses the unused portion (12) may be positioned closer to the second conveying section (120) than the rolling roller section (500) so that it presses the unused portion (12) after the rolling roller section (500) presses the retaining portion (11) area. That is, the rolling roller section (500) that presses the retaining portion (11) of the electrode sheet (10) may be positioned between the first conveying section (110) and the roller section (200).

[0082] The rolling roller section (500) may include a first rolling roller (510) located on one side of the holding section (11) and a second rolling roller (520) located on the other side of the holding section (11). The first rolling roller (510) and the second rolling roller (520) are arranged to come into contact with each other with the holding section (11) in between, and can be driven to roll and press the holding section (11).

[0083] Since this rolling roller part (500) is obvious to those skilled in the art, a more detailed explanation will be omitted.

[0085] FIG. 10 is a flowchart for explaining a method of applying pressure to a non-removable part using a non-removable part pressure device according to a first embodiment of the present invention.

[0086] Referring to FIGS. 3 to 10, a method for applying pressure to a non-solid part using a non-solid part applying pressure device according to the first embodiment of the present invention comprises: (S1) a step of unwinding an electrode sheet (10); (S2) a step of applying pressure to a non-solid part (12) of the electrode sheet (10) through a roller part (200) to form an uneven pattern (P); and (S3) a step of obtaining information on the uneven pattern (P) through a sensing part (300); and may further include a position correction step of adjusting the position of the roller part (200) when the position of one end of the uneven pattern (P) deviates from a preset range from the uneven pattern (P) information obtained in step (S3).

[0087] (S3) In step, the sensing unit (300) can obtain information about the uneven pattern (P) and provide it to the control unit (400) in real time. At this time, the control unit (400) can adjust the position of the roller unit (200) by providing a signal to the roller unit (200) based on the information about the uneven pattern (P) when the position of one end of the uneven pattern (P) deviates from a preset range.

[0088] At this time, the pre-set range may be a range spaced at least by a first distance (a1) from the other end of the retaining part (11), or a range spaced at least by a second distance (a2) from the other end of the retaining part (11). Alternatively, the pre-set range may be a range spaced at least by a first distance (a1) from the other end of the retaining part (11) and spaced at least by a second distance (a2) from the other end of the retaining part (11).

[0089] That is, the control unit (400) can adjust the position of the roller unit (200) so that the position of one end of the uneven pattern (P) is located within a range of greater than or equal to a first distance (a1) from the other end of the retaining unit (11) and less than or equal to a second distance (a2) from the other end of the retaining unit (11).

[0090] A position separated by a first distance (a1) and a second distance (a2) from the other end of the retaining part (11) are located within the insulating part (12a), and accordingly, the pre-set range may be a part of the insulating part (12a).

[0091] Meanwhile, the sensing unit (300) is preferred to obtain information on the first distance (a1) and the second distance (a2) based on the other end of the retaining unit (11), because the active material layer of the retaining unit (11) can be identified more accurately than the non-insulating unit (12b) on which the active material layer is not coated.

[0092] Additionally, the control unit (400) can adjust the z-axis rotation angle of the roller unit (200) by providing a signal to the roller unit (200) when the angle of the uneven pattern (P) obtained in step (S3) deviates from a preset angle range.

[0094] FIG. 11 is a perspective view for explaining a non-restricted pressure device according to a second embodiment of the present invention.

[0095] Referring to FIGS. 3, 4, 10, and 11 together, the non-removable pressure device according to the second embodiment of the present invention includes a transfer unit (100), a roller unit (200), a sensing unit (300), and a control unit (400), just like the first embodiment. However, unlike the first embodiment, in the second embodiment, a second irregularity (221) is provided on the outer surface of the second roller (220), and the sensing unit (300) may further include a second vision unit (320).

[0096] The second protrusion (221) is formed to extend along the axial direction of the second roller (220) with respect to the outer surface of the second roller (220), and may be provided in multiple numbers spaced apart by a predetermined distance along the circumference of the second roller (220).

[0097] At this time, the second irregularity (221) may be arranged to intersect with the first irregularity (211). For example, when the first roller (210) and the second roller (220) press the bare portion (12), the second irregularity (221) intersects with the first irregularity (211) and presses the bare portion (12) to form an irregularity pattern (P) on the bare portion (12).

[0098] Accordingly, the uneven pattern (P) can be formed in a shape where the peaks and valleys are repeated, with the first unevenness (211) forming the valleys and the second unevenness (221) forming the peaks.

[0099] The first roller (210) and the second roller (220) may be provided with a high-hardness material to form an uneven pattern (P) on the uneven portion (12). For example, the first roller (210) and the second roller (220) may be formed from high-strength and high-hardness engineering plastic.

[0100] Additionally, the second vision unit (320) can photograph the other side of the blank area (12) to obtain information on the uneven pattern (P) formed on the other side of the blank area (12) by the second unevenness (221). The second vision unit (320) can be located near the second roller (220) to photograph the other side of the electrode sheet (10) that has passed through the roller section (200). This second vision unit (320) can transmit the information on the obtained uneven pattern (P) to the control unit (400).

[0101] The method for pressurizing a non-existent part using a non-existent part pressurizing device according to the second embodiment of the present invention is identical to the method for pressurizing a non-existent part using a non-existent part pressurizing device according to the first embodiment; therefore, a detailed description thereof is omitted.

[0103] As specific parts of the present invention have been described in detail above, it is obvious to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the invention, and that various changes and modifications are possible within the scope and spirit of the invention, and that such variations and modifications fall within the scope of the appended claims. Explanation of the symbols

[0104] 10: Electrode sheet 11: Maintenance Department 12: Mujibu 12a: Insulation part 12b: Non-insulated part 100: Transfer section 110: 1st Transfer Unit 120: 2nd Transfer Unit 200: Roller section 210: 1st roller 211: First irregularity 220: 2nd Roller 221: Second unevenness 300: Sensing unit 310: 1st Vision Unit 320: 2nd Vision Unit 400: Control unit 500: Rolling roller section 510: 1st rolling roller 520: Second rolling roller P: Uneven pattern

Claims

Claim 1 A non-existent area pressurizing device for pressurizing a non-existent area in which an active material layer is not formed in an electrode sheet, comprising: a conveying unit for unwinding and winding the electrode sheet; a roller unit including a first roller that presses one side of the non-existent area to form an uneven pattern and a second roller that is positioned to come into contact with the first roller with the non-existent area in between; a sensing unit for obtaining information on the uneven pattern; and a control unit that transmits a signal to the roller unit to move along a set position based on information on the uneven pattern obtained from the sensing unit. Claim 2 A pressure device for a non-removable part according to claim 1, wherein the first roller is provided with a first irregularity on its outer surface to form an irregularity pattern on one surface of the non-removable part, and the second roller is provided to support the other surface of the non-removable part. Claim 3 A pressure device for a non-insulating portion according to paragraph 2, wherein the non-insulating portion comprises an insulating portion coated with an insulating material outside the retaining portion on which the active material layer is formed, and a non-insulating portion outside the insulating portion, and the roller portion is driven to press a portion of the insulating portion and the non-insulating portion. Claim 4 A pressure device for a blank area according to paragraph 3, characterized in that the sensing unit includes a first vision unit that photographs one side of the blank area. Claim 5 A pressure device for a non-removable part according to claim 4, characterized in that the control unit controls the roller part so that when one end of the uneven pattern deviates from a preset range, the one end of the uneven pattern corresponds to a preset range. Claim 6 A pressure device for a non-insulated portion according to paragraph 3, characterized in that the roller portion has a width length capable of pressing both the insulating portion and the non-insulating portion of the non-insulated portion. Claim 7 A method for pressurizing a non-removable portion using a non-removable portion pressurizing device according to any one of claims 1 to 6, comprising: (S1) a step of unwinding the electrode sheet; (S2) a step of pressurizing the non-removable portion of the electrode sheet through the roller portion to form the uneven pattern; (S3) a step of obtaining the uneven pattern information through the sensing portion; and a position correction step of adjusting the position of the roller portion when the position of one end of the uneven pattern deviates from a preset range based on the uneven pattern information obtained in step (S3). Claim 8 A method for applying pressure to a non-insulating portion according to claim 7, wherein the non-insulating portion comprises an insulating portion coated with an insulating material outside the retaining portion on which the active material layer is formed, and a non-insulating portion outside the insulating portion, and wherein the predetermined range is a part of the insulating portion. Claim 9 A method for applying pressure to a non-retaining part, characterized in that, in claim 8, the above-mentioned preset range is a range spaced apart from the other end of the retaining part by a first distance or more. Claim 10 A method for applying pressure to a non-retaining part, characterized in that, in claim 8, the above-mentioned preset range is a range spaced apart from the other end of the retaining part by a second distance or less. Claim 11 A method for applying pressure to a non-retaining part according to claim 8, wherein the above-mentioned preset range is spaced apart from the other end of the retaining part by a first distance or more and spaced apart from the other end of the retaining part by a second distance or less.

Images