Insulating sheet manufacturing method and manufacturing device

Abstract

The present invention relates to a method for manufacturing an insulating sheet having a three-dimensional shape, comprising: a preparation step of preparing a planar sheet in which a molding groove is formed; a first cutting step of irradiating a laser beam from the side surface of the sheet to cut the side surface of the molding groove; a second cutting step of irradiating a laser beam from the upper side of the molding groove of which the side surface is cut, and cutting into an insulating sheet in which the molding groove is completely separated from the sheet; an adhesive tape attaching step of attaching an adhesive tape to the outer surface of the insulating sheet; and a bending step in which one end of the surface of the insulating sheet to which the adhesive tape is attached is bent into a shape that is bent in the direction in which the adhesive tape is attached, thereby making it possible to manufacture a large number of three-dimensional insulating sheets that are difficult to be manufactured using a mold.

Description

Technical Field

[0001] The present invention relates to a technology for manufacturing an insulating sheet, and more particularly to a method for manufacturing an insulating sheet having a three-dimensional shape without using a die, and a manufacturing device for the insulating sheet. Background Art

[0002] Electric vehicles are a new generation of transportation tools that replace engine vehicles that generate driving force by burning fossil fuels. The structure of such electric vehicles consists of an electric motor for driving wheels connected to the lower part of the vehicle body and a secondary battery (battery) as an energy source for driving the electric motor. The electric motor is driven by the electricity charged in the secondary battery, so that the electric vehicle can move.

[0003] According to the battery structure used in such an electric vehicle, a battery module for charging and a battery bracket for supporting and fixing the battery module in an engine room of the vehicle are included.

[0004] On the other hand, an insulating sheet must be attached to a bracket made of metal to prevent various accidents such as electrical failure or fire caused by the conduction of current leaking from the battery. The battery bracket is formed in various three-dimensional shapes such as a rectangular parallelepiped, so the insulating sheet attached to the battery bracket is also manufactured in a flat or three-dimensional shape.

[0005] Generally, in order to manufacture insulating sheets, a forming die and a cutting die are used for the insulating sheets. However, in a press machine that performs linear reciprocating motion, the die is usually a die with a special tool for forming and cutting metal or polymer products, which is suitable for manufacturing flat shapes, but has limitations when manufacturing insulating sheets with three-dimensional shapes.

[0006] Furthermore, the mechanical cutter uses a method of cutting the sheet by pressing a blade formed in a set pattern with a press machine. This method has a problem of generating burrs on the cut surface of the insulating sheet, and is therefore not suitable for precise cutting of the insulating sheet.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: KR10-0960302

[0010] Patent Document 2: KR10-1367481

[0011] Patent Document 3: KR10-1937936 Summary of the invention

[0012] Problems to be solved by the invention

[0013] The present invention is proposed to solve the above-mentioned problems of the prior art, and its purpose is to provide an insulating sheet manufacturing method and manufacturing device, wherein even without using a die, a three-dimensional insulating sheet can be accurately manufactured and the production yield of the insulating sheet can be greatly improved.

[0014] Solutions for solving problems

[0015] The insulating sheet manufacturing method of the present invention for solving the above-mentioned problems includes: a preparation step of preparing a flat sheet with a molding groove formed thereon; a first cutting step of irradiating a laser beam from the side of the sheet to cut the side of the molding groove; a second cutting step of irradiating a laser beam from the upper side of the molding groove whose side is cut to cut the insulating sheet in which the molding groove is completely separated from the sheet; a tape attaching step of attaching a tape to the outer side of the insulating sheet; and a bending step of bending one side end of the surface of the insulating sheet to which the tape is attached into a shape bent toward the direction in which the tape is attached.

[0016] In addition, it includes a clamp unit for adsorbing and fixing the above-mentioned insulating sheet in the above-mentioned tape attachment step, and the above-mentioned clamp unit includes: a sheet suction clamp, which is a clamp for installing the above-mentioned insulating sheet, and the above-mentioned sheet suction clamp is composed of a clamp body, and the above-mentioned clamp body forms a first suction space which is open at the bottom and empty inside, and the surface of the above-mentioned clamp body on which the above-mentioned insulating sheet is installed is formed with a plurality of suction holes; and a clamp base, which provides suction to the above-mentioned sheet suction clamp by combining with the above-mentioned sheet suction clamp, and the above-mentioned clamp base is composed of a base, and the above-mentioned base forms a second suction space which is open at the top and empty inside, and the second suction space and the first suction space together form a closed space, and a side surface of the above-mentioned base forming the above-mentioned second suction space is formed with a connection port connected to a vacuum pipe.

[0017] On the other hand, it also includes a single bending fixture base for bending the above-mentioned insulating sheet once in the above-mentioned bending step, and the above-mentioned single bending fixture base includes: a base body, which is in close contact with the inner side surface of the above-mentioned insulating sheet, and a receiving groove for accommodating a bending blade is formed on the surface of the above-mentioned base body facing the bent surface of the above-mentioned insulating sheet; and an upper plate, which is arranged on the rear side of the above-mentioned receiving groove in the above-mentioned base body, and the above-mentioned upper plate forms a clamping space portion for clamping the end of the above-mentioned insulating sheet.

[0018] In addition, it also includes a secondary bending device for performing secondary bending on the above-mentioned insulating sheet in the above-mentioned bending step, and the above-mentioned secondary bending device includes: a base plate, which is used to place the above-mentioned insulating sheet; a pressure roller module, which is arranged on the upper part of the above-mentioned base plate, and bends the primary bending part of the above-mentioned insulating sheet by rotating the roller to apply pressure; and inner and outer guides of the sheet, which are respectively arranged on the upper part of the above-mentioned base plate and along the front and rear directions (Y-axis direction) of the above-mentioned roller with the above-mentioned roller as a reference, and during the bending of the above-mentioned insulating sheet, the inner and outer guides of the sheet abut against the inner and outer sides of the above-mentioned insulating sheet to guide the accurate bending position of the above-mentioned insulating sheet.

[0019] Effects of the Invention

[0020] The insulating sheet manufacturing method of the present invention constructed in the above manner can continuously cut multiple molding grooves formed in a flat sheet one by one in a manner that conforms to a three-dimensional shape. Thus, it is possible to precisely cut a three-dimensional complex shape that is difficult to cut with a mold in the past and is reflected in a flat sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a perspective view showing a state where an insulating sheet manufactured according to an embodiment of the present invention is installed on a battery bracket.

[0022] Figure 2 FIG. 1 is a diagram showing an insulating sheet manufactured according to an embodiment of the present invention.

[0023] Figure 3 FIG. 1 is a flow chart showing a process for manufacturing an insulating sheet according to an embodiment of the present invention.

[0024] Figure 4 The present invention is a perspective view showing a material (a planar sheet having formed grooves) for manufacturing an insulating sheet according to an embodiment of the present invention.

[0025] Figure 5 FIG. 1 is a perspective view showing a cutting device for manufacturing an insulating sheet according to an embodiment of the present invention.

[0026] Figure 6 FIG. 1 is a perspective view showing a clamp unit and a clamp transfer unit in a cutting device according to an embodiment of the present invention.

[0027] Figure 7 A diagram showing a cutting line of a shaped groove embodied in a material by a cutting device according to an embodiment of the present invention.

[0028] Figure 8 FIG. 4 is an exploded view of a tape attaching device for manufacturing an insulating sheet according to an embodiment of the present invention.

[0029] Fig. 9 For Figure 8A cross-sectional view of a tape attachment device is shown in FIG.

[0030] Fig.10 To show in Figure 8 A three-dimensional view of the tape attaching device and a view of an insulating sheet to which the tape is attached are shown in FIG.

[0031] Fig.11 The figure is a three-dimensional view of a one-bending jig base for performing one-bending on an insulating sheet according to an embodiment of the present invention.

[0032] Fig.12 For Fig.11 A cross-sectional view of a primary bending fixture base is shown in FIG.

[0033] Fig.13 To show that by Fig.11 The figure shows a state where the primary bending jig base completes the bending of the insulating sheet.

[0034] Fig.14 The figure is a three-dimensional diagram of a secondary bending device for performing secondary bending on an insulating sheet according to an embodiment of the present invention.

[0035] Fig.15 For Fig.14 A cross-sectional view of the secondary bending device shown in FIG.

[0036] Fig.16a , Fig.16b , Fig.16c Shown in Fig.14 FIG. 2 is a diagram showing the operation sequence of the secondary bending device for bending the insulating sheet.

[0037] Fig.17 FIG. 1 is a diagram showing a state where an insulating sheet is bent once and twice according to an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 10: Insulation sheet 20: Battery module bracket

[0040] 30: sheet 31: molding groove

[0041] 40: tape 100: laser cutting equipment

[0042] 110: Main body 120: Fixture unit

[0043] 130: Fixture transfer unit 140: Side laser cutting unit

[0044] 150: Plane laser cutting unit 200: Tape attachment device

[0045] 210: Sheet suction fixture 220: Fixture base

[0046] 300: Single bending fixture base 310: Base body

[0047] 311: Receiving slot 320: Upper plate

[0048] 321: Insertion space 330: Side panel

[0049] 340: Pressurizing punch 350: Lower plate

[0050] 400: Secondary bending device 410: Base plate

[0051] 420: Pressure roller module 421: Roller

[0052] 422: Roller bracket 423: Roller mounting plate

[0053] 430: Roller pressure plate 440: Sheet inner guide

[0054] 450: Sheet outer guide. DETAILED DESCRIPTION

[0055] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same structures, and repeated descriptions and descriptions of known functions and structures that may unnecessarily confuse the gist of the present invention are omitted. The embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art. Therefore, in order to emphasize a clearer description, the shapes and sizes of the elements in the drawings may be shown in an exaggerated manner.

[0056] <Insulation Sheet>

[0057] Figure 1 The present invention is a perspective view showing a state where an insulating sheet manufactured according to an embodiment of the present invention is installed on a battery bracket. Figure 2 1 is a perspective view showing the insulating sheet shown in FIG. 1 .

[0058] Reference Figure 1 and Figure 2 The insulating sheet 10 is a structure installed on both sides of a battery module bracket 20 that accommodates a battery module (not shown) to achieve withstand voltage insulation of the battery module. More specifically, the insulating sheet 10 is arranged on both sides of the battery module bracket 20 to contact the horizontal surface, side surface and end surface of both side ends of the battery module (not shown), that is, to prevent the end of the battery module from directly contacting the battery module bracket 20, thereby preventing leakage current from flowing to the battery module bracket 20 side.

[0059] At this time, the insulating sheet 10 is stably fixed by the adhesive tape 40 while being sandwiched between the two side surfaces of the battery module bracket 20. To this end, the insulating sheet 10 has an "L" cross-sectional shape consisting of a vertical surface 11, a bottom surface 12, and a side surface 13. The vertical surface 11 is located on the bottom surface of the battery module bracket 20 and is a portion for placing the horizontal surface (lower surface) forming the two side ends of the battery module.

[0060] The bottom surface 12 is disposed on the side of the battery module bracket 20 and is in contact with the two side ends of the battery module. The upper end of the bottom surface 12 is bent about 180 degrees toward the rear side, that is, toward the side direction of the battery module bracket 20 to form a bent portion 12a. This bent portion 12a is sandwiched at the upper end of the side of the battery module bracket 20 in a roughly "∩" cross-section, thereby playing a role in stably fixing the insulating sheet 10 without causing the insulating sheet 10 to be separated from the battery module bracket 20. Notches 12b are formed at the two side ends of the bottom surface 12 to make the bent portion easy to bend.

[0061] The adhesive tape 40 is attached to the bottom surface 12 of the insulating sheet 10, so that the insulating sheet 10 can be stably fixed to the battery module bracket 20. In addition, the side surfaces 13 of the insulating sheet 10 are portions that contact the side surfaces forming the side ends of the battery module.

[0062] As described above, the insulating sheet of the present invention is firmly fixed by adhesive tape while being sandwiched between the two side surfaces of the battery bracket, so that even if it is subjected to external impact, it will not be detached from the bracket and the battery module can be stably insulated. This insulating sheet is made of non-conductive material in the form of a very thin film. Preferably, it is made of plastic materials such as polyethylene (PE), polypropylene (PP), polyamide (PA), polyethylene terephthalate (PET), polycarbonate (PC), etc.

[0063] <Insulating Sheet Manufacturing Method>

[0064] Figure 3 FIG. 1 is a flow chart showing the sequence of manufacturing an insulating sheet according to the present invention.

[0065] Reference Figure 3The manufacturing method of the insulating sheet of the present invention comprises: a preparation step S10, preparing a flat sheet with a molding groove formed thereon; a first cutting step S20, irradiating a laser beam from both sides of the sheet to cut the side of the molding groove; a second cutting step S30, irradiating a laser beam from the upper side of the molding groove whose side is cut to cut the insulating sheet in which the molding groove is completely separated from the sheet; a tape attaching step S40, attaching a tape to the outer side of the insulating sheet; a primary bending step S50 and a secondary bending step S60, bending one side end of the surface of the insulating sheet to which the tape is attached to be bent in a shape bent toward the direction to which the tape is attached; and an inspection step, inspecting the withstand voltage insulation degree of the finally manufactured insulating sheet. At this time, the primary bending is bent to a specified angle by a press punch, and the secondary bending is finally bent to a desired angle by a rotating roller.

[0066] Hereinafter, the insulating sheet manufacturing method will be described in more detail together with a manufacturing apparatus for manufacturing the insulating sheet in each step.

[0067] <Material preparation steps>

[0068] Figure 4 The figure is a perspective view showing a planar sheet formed with forming grooves and used for manufacturing an insulating sheet according to an embodiment of the present invention.

[0069] Reference Figure 4 A plurality of molding grooves 31 (e.g., 6) are formed long along the length direction of the flat sheet 30. The molding grooves 31 are cut and bent into a predetermined shape such as a three-dimensional shape. Figure 2 In other words, six insulating sheets 10 can be manufactured simultaneously in one sheet 30 .

[0070] <Laser cutting steps>

[0071] Figure 5 A perspective view showing a cutting device for manufacturing an insulating sheet according to an embodiment of the present invention, Figure 6 FIG. 1 is a perspective view showing a clamp unit and a clamp transfer unit in a cutting device according to an embodiment of the present invention. Figure 7 The figure shows the cutting lines of the shaped grooves formed in the sheet by the above-mentioned cutting device.

[0072] Reference Figure 5 and Figure 6 The cutting device cuts the molded groove 31 embodied in the sheet 30 into a three-dimensional shape by irradiating the sheet 30 with multiple laser beams.

[0073] To this end, the above-mentioned laser cutting equipment 100 includes: a main body 110; a clamp unit 120, which is used to place the sheet 30; a clamp transfer unit 130, which is used to transfer the clamp unit 120; a side laser cutting unit 140, which is used to cut the side of the sheet 30; and a plane laser cutting unit 150, which is used to cut the plane of the sheet 30.

[0074] The clamp unit 120 vacuum-adsorbs and fixes the sheet 30 to be cut. The clamp unit 120 has a shape that matches the sheet 30 so that the sheet 30 can be tightly loaded without any gap.

[0075] The fixture transfer unit 130 is long and arranged on the body 110 in the form of a linear guide rail, and transfers the fixture unit 120 from the material feeding area to the material discharging area through the material cutting area. The driving part of the fixture transfer unit 130 moves through a linear motor method, a screw method, or a conveyor belt transfer method known in the art, thereby moving the fixture unit.

[0076] The side laser cutting unit 140 is composed of a first side laser cutting unit 141 and a second side laser cutting unit 142 which are arranged in a pair facing each other on both sides of the transfer rail 131. The first side laser cutting unit 141 is arranged on one side of the transfer rail 131 to cut one side surface ( Figure 7 Furthermore, the second side laser cutting unit 142 is disposed on the other side of the transfer rail 131 to cut the other side of the molding groove 31.

[0077] As described above, the side laser cutting unit 140 irradiates the laser beam along the cutting line to both side surfaces of the rectangular parallelepiped molding groove 31 formed long along the width direction of the sheet 30 , thereby simultaneously cutting both side surfaces of the molding groove 31 .

[0078] The above-mentioned plane laser cutting unit 150 cuts the molding groove 31 on the upper part of the sheet 30. This plane laser cutting unit 150 is composed of a third plane laser cutting unit 151 and a fourth plane laser cutting unit 152 arranged in front and behind the upper part of the transfer guide 131. Among them, the third plane laser cutting unit 151 is arranged directly behind the side laser cutting unit 140, and the fourth plane laser cutting unit 152 is arranged directly behind the third plane laser cutting unit 151, thereby cutting the molding groove 31. That is, the third plane laser cutting unit 151 and the fourth plane laser cutting unit 152 cut the remaining part of the molding groove 31 cut once, so that the above-mentioned molding groove 31 is completely separated from the sheet 30.

[0079] More specifically, the third plane laser cutting unit 151 irradiates a laser beam along the width direction of the molding groove 31 toward the long side of the upper end of the molding groove 31 to cut the molding groove 31 ( Figure 7 The fourth plane laser cutting unit 152 irradiates a laser beam toward the bottom surface of the molding groove 31 along the width direction of the molding groove 31 to cut the molding groove 31 ( Figure 7 C line).

[0080] As described above, in the present invention, the first side laser cutting unit and the second side laser cutting unit arranged on both side surfaces of the sheet and the third plane laser cutting unit and the fourth plane laser cutting unit arranged on the front and back of the upper part of the sheet are organically arranged in a three-dimensional space, thereby enabling multiple forming grooves formed on a sheet to be continuously cut one by one in a manner conforming to the desired three-dimensional shape.

[0081] <Tape Attachment Procedure>

[0082] Figure 8 is an exploded view of a tape attachment device for manufacturing an insulating sheet according to an embodiment of the present invention, Fig. 9 is a cross-sectional view of the above-mentioned tape attachment device, Fig.10 A perspective view of the tape attaching device and an insulating sheet to which the tape is attached is shown.

[0083] As mentioned above, the insulating sheet manufactured by the present invention is made of a very thin plastic material. Therefore, during the period when the insulating sheet is attached with the adhesive tape, it is difficult for the insulating sheet to remain in the fixed position, and the shape of the insulating sheet will change due to external force, which makes the adhesive tape attachment operation very difficult. Therefore, the present invention provides a means for stably attaching the adhesive tape to the insulating sheet without causing the shape of the insulating sheet to change in the fixed position.

[0084] Reference Figures 8 to 10 The above-mentioned tape attaching device is a device as follows: it includes a tape attaching device 200 composed of a sheet suction clamp 210 and a clamp base 220, and attaches the tape while adsorbing and fixing the insulating sheet 10.

[0085] The sheet suction fixture 210 is a fixture for directly installing the insulating sheet 10. The sheet suction fixture 210 is composed of a fixture body 211. The fixture body 211 is formed with a first suction space 212 which is open at the bottom and empty inside. The surface of the fixture body 211 on which the insulating sheet 10 is installed is formed with multiple suction holes 213.

[0086] The clamp body 211 has a shape that can tightly fix all inner side surfaces of the insulating sheet 10. At this time, the surface of the insulating sheet 10 to which the adhesive tape 40 is attached is installed in a manner facing the upper side of the clamp body 211. In addition, a plurality of suction holes 213 are formed at a predetermined interval on each surface of the clamp body 211 that is in close contact with the insulating sheet 10. Thus, if a vacuum is generated in the first suction space 212, all surfaces of the insulating sheet 10 are tightly fixed to the clamp body 211 through each suction hole 213, thereby allowing the adhesive tape to be stably attached without the insulating sheet 10 moving or deforming.

[0087] The fixture base 220 is directly connected to a vacuum pipe (not shown) to provide suction to the sheet suction fixture 210. The fixture base 220 is composed of a base 221, and the base 221 is formed with a second suction space 222 with an open top and an empty interior. The second suction space 222 and the first suction space 212 form a closed space. A side surface of the base 221 forming the second suction space 222 is formed with a plurality of connection ports 224 connected to the vacuum pipe.

[0088] It should be noted here that the sheet suction fixture 210 and the fixture base 220 are arranged up and down and form a closed suction space (a first suction space 212 and a second suction space 222) inside, and the insulating sheet 10 is fixed to the sheet suction fixture 210 arranged at the upper part, and the fixture base 220 arranged at the lower part is connected to the vacuum pipe.

[0089] At this time, in the jig base 220, the upper end of the second suction space 222 forms a step surface with an area wider than the horizontal area of ​​the second suction space 222, thereby forming a placement surface 223 of the open lower surface for placing the sheet suction jig 210. The sheet suction jig 210 and the jig base 220 are fastened to each other on the left and right sides of the placement surface 223 by screws 225.

[0090] As described above, the tape attaching device of the present invention can attach the tape to an insulating sheet made of a very thin plastic material by means of an adsorption clamp so that the tape is attached at a fixed position without any deformation. Therefore, the tape attaching operation can be easily performed at an accurate position.

[0091] The adhesive tape 40 is a double-sided adhesive tape, and the adhesive tape 40 is attached to the insulating sheet 10 in a state where a release paper is attached to the opposite side of the surface attached to the insulating sheet 10 .

[0092] <Insulation Sheet Bending Steps>

[0093] Fig.11 and Fig.12 A one-bending jig base for one-bending an insulating sheet according to an embodiment of the present invention is shown. Fig.13The figure shows a state where the insulating sheet is bent by the primary bending jig base. Figure 14 to Figure 1 FIG6 shows a secondary bending device for performing secondary bending on an insulating sheet according to an embodiment of the present invention.

[0094] As described above, the insulating sheet manufactured by the present invention is attached by means of an adhesive tape while the end of the insulating sheet is clamped and mounted on the side of the bracket, so that the insulating sheet can be firmly fixed to the side of the battery bracket.

[0095] To this end, the present invention provides a means for forming the end of the insulating sheet into a "∩" cross-section shape. However, the insulating sheet manufactured in the present invention is made of a very thin plastic material. If the applied load is removed after the end of the sheet is bent, a rebound phenomenon occurs to restore the original shape, so it is difficult to bend it into a desired shape. In order to solve this problem, the present invention has developed the following scheme of performing primary bending and secondary bending in sequence: for the bending of the insulating sheet, a punch is used to bend it once to a specified angle, and then a roller is used to bend it twice to a desired angle.

[0096] Therefore, in the present invention, the bending device for bending the insulating sheet is also provided as a primary bending device and a secondary bending device.

[0097] Reference Figures 11 to 13 The one-time bending device includes a one-time bending fixture base 300 for supporting the insulating sheet 10 when the insulating sheet 10 is first bent. The one-time bending fixture base 300 includes a base body 310, an upper plate 320, a side plate 330 and a lower plate 350.

[0098] The base body 310 is in the shape of a rectangular block as a whole, and the insulating sheet 10 is clamped and installed in an inverted state on one side of the base body 310. More specifically, the upper surface of the base body 310 is in close contact with the inner side of the bottom surface 12 of the insulating sheet 10, the side surface of the base body 310 is in close contact with the inner side of the vertical surface 11 of the insulating sheet 10, and the two side surfaces of the base body 310 are in close contact with the inner side surfaces of the two side surfaces 13 of the insulating sheet 10.

[0099] A receiving groove 311 for receiving the press punch 340 is formed on the surface of the base body 310 that is in close contact with the curved surface of the insulating sheet 10, that is, on the upper surface of the base body 310 that is in close contact with the bottom surface 12 of the insulating sheet. Thus, as the press punch 340 enters the receiving groove 311, the bottom surface 12 of the insulating sheet 10 is pressed downwardly from the receiving groove 311, thereby being bent at a predetermined angle.

[0100] At this time, a unit is provided at the rear side of the receiving groove 311 in the base body 310 to prevent the curved surface (bottom surface 12) of the insulating sheet 10 from tilting up when the insulating sheet 10 is bent. For this purpose, an upper plate 320 for inserting and clamping the end of the insulating sheet 10 is provided at the rear side of the receiving groove 311 in the base body 310. This upper plate 320 has a plate shape arranged on the upper surface of the base body 310, and the upper plate 320 is formed with a clamping space portion 321 having a height separated from the base body 310 in the direction formed by the receiving groove 311. It should be noted here that when the insulating sheet 10 is installed on the base body 310, the curved surface of the insulating sheet 10 crosses the receiving groove 311, and the end of the insulating sheet 10 is placed in the clamping space portion 321 formed at the lower part of the upper plate 320.

[0101] The bending action in the state where the insulating sheet 10 is installed on the primary bending jig base 300 is described as follows: First, if the pressure punch 340 descends and contacts the curved surface (bottom surface 12) of the insulating sheet 10, then the pressure punch 340 further descends and further enters the receiving groove 311, the curved surface 12 is pressed downward, and the curved end is prevented from warping by the upper plate 320, and the insulating sheet 10 on the opposite side generates a force to warp upward. Then, as the pressure punch 340 continues to enter the receiving groove 311, as shown in FIG. Fig.13 As shown, with the press punch 340 as a reference, one side portion of the insulating sheet 10 is tilted upward, and the opposite end portion thereof is separated from the sandwiching space portion 321 of the upper plate 320 and bent toward the receiving groove 311 .

[0102] At this time, the upper plate 320 can be fixedly set on the base body 310, but can also be set to adjust the front and rear position in the base body 310 so as to flexibly cope with the length of the curved surface in the insulating sheet 10. To this end, a plurality of line-shaped clamping grooves 312 are formed at a predetermined interval along the width direction of the base body 310 on the upper surface of the base body 310. A plurality of clamping protrusions 322 matching the clamping grooves 312 are formed on the lower surface of the upper plate 320 along the width direction of the upper plate 320. Thus, the upper plate 320 is fixed to the upper surface of the base body 310 by the slot-protrusion structure position variably, thereby adjusting the front and rear position of the upper plate 320, and the operator can adjust it more easily and accurately. For example. When the length of the curved surface increases by about 2 mm, the position of the upper plate is changed from the clamping groove 312 at the reference position to the clamping groove 312 moved back by 2 grids, so that the size of the curved surface (bottom surface 12) of the insulating sheet 10 can be flexibly coped with. The upper plate 320 is fixed to the base body 310 by bolts. At this time, the upper plate 320 is formed with a long groove 323 formed long along the direction of position movement so that it can be fixed to the base body 310 while coping with position changes.

[0103] On the other hand, the lower surface of the base body 310 with a step difference is provided with a side panel 330 protruding at a predetermined height toward both sides of the insulating sheet 10. Such a side panel 330 provides a reference for the installation position when the insulating sheet 10 is installed on the base body 310, and can prevent the insulating sheet 10 from excessively detaching toward the side when it is bent.

[0104] In addition, the lower plate 350 is arranged at the front side at a predetermined interval from the vertical surface 11 of the insulating sheet 10 on the lower surface with a step difference of the base body 310, so as to prevent the insulating sheet 10 from being excessively pushed forward when the insulating sheet 10 is bent. This lower plate 350 also has the same structure as the upper plate 320, that is, it is variably installed on the base body 310 in the front and rear positions so as to be able to flexibly cope with the length of the vertical surface 11 of the insulating sheet 10. To this end, a plurality of clamping protrusions 351 are formed long at a predetermined interval along the width direction on the bottom surface of the lower plate 350, and a plurality of clamping grooves 313 corresponding to the clamping protrusions 351 are formed at a predetermined interval on the upper surface of the base body 310. In addition, a long groove 352 is formed long along the direction of position movement on the lower plate 350 so as to be fixed to the base body 310 while being able to cope with position changes.

[0105] On the other hand, the secondary bending device 400 performs final bending on the bent portion of the insulation sheet by means of a rotatable roller, and includes a base plate 410 , a pressurizing roller module 420 , a roller pressurizing plate 430 , and insulation sheet guides 440 , 450 .

[0106] The base plate 410 is in the shape of a rectangular plate as a whole, and provides a base surface for installing various components for secondary bending. A hollow profile 411 and a block 412 are provided at the bottom of the base plate 410 to maintain a specified height and support the load during bending.

[0107] The pressure roller module 420 is mounted on the upper surface of the base plate 410, and directly bends the insulating sheet 10 through a rotatable roller 421. The pressure roller module 420 is formed by a structure that can change the position of the roller 421 in three axial directions of the X axis, the Y axis, and the Z axis, so as to flexibly cope with the size of the insulating sheet 10 and the bending angle of the bending portion. To this end, the pressure roller module 420 is composed of a roller bracket 422 that changes its position in the front-to-back direction (Y axis direction) and a roller mounting plate 423 that changes its position in the left-right direction (X axis direction) and the up-down direction (Z axis direction).

[0108] The roller bracket 422 is provided on the base plate 410 to support the roller mounting plate 423. The roller bracket 422 is composed of a two-piece structure of a lower bracket 422a and an upper bracket 422b, which are combined in a manner that can be separated from each other by bolts. The lower bracket 422a is fixedly provided on the base plate 410, and the upper bracket 422b is provided on the upper surface of the lower bracket 422a in a manner that can be moved in the front-to-back direction (Y-axis direction). For this purpose, a plurality of bolt fastening holes 424 are formed at a predetermined interval along the front-to-back direction (Y-axis direction) on the upper surface of the lower bracket 422a, and a bolt through hole 425 penetrates the entire thickness at a position corresponding to the bolt fastening hole 424 of the upper bracket 422b. At this time, preferably, the bolt fastening hole 424 and the bolt through hole 425 are formed in two rows on the left and right to improve the fastening force. And, preferably, the bolt through hole 425 is formed as an elliptical long hole to achieve the convenience of bolt fastening.

[0109] On the other hand, the upper bracket 422b is longer in the front-to-back direction (Y-axis direction) than the lower bracket 422a. Thus, the surrounding components can be effectively arranged within the limited area of ​​the base plate 410. For example, the sheet inner side guide 440 described later is arranged below the upper bracket 422b, so that the upper bracket 422b can change its position in the front-to-back direction (Y-axis direction) without being interfered by the sheet inner side guide 440.

[0110] The roller mounting plate 423 is vertically mounted on the front surface of the upper bracket 422b, and the roller 421 is rotatably mounted on the lower portion of the roller mounting plate 423. The roller mounting plate 423 is mounted so as to be able to change its position along the vertical direction (Z-axis direction) and the horizontal direction (X-axis direction) on the front surface of the upper bracket 422b. For this purpose, a plurality of bolt fastening holes 426 are formed on the front surface of the upper bracket 422b in rows and columns aligned along the vertical direction and the horizontal direction. In addition, a pair of left and right bolt through holes 427 are formed long at positions of the roller mounting plate 423 corresponding to the bolt fastening holes 426 for passing bolts.

[0111] The roller 421 bends the first bending portion of the insulating sheet by rotating and applying pressure. Preferably, the roller 421 rotates constantly with high hardness while minimizing the friction with the insulating sheet. For this purpose, the roller 421 is preferably made of plastic or rubber with low friction and high hardness. One roller 421 can be provided, but multiple rollers can also be used as needed.

[0112] On the other hand, the roller support 422 may be configured as follows: the structure is directly provided on the base plate 410, and when the insulating sheet 10 is bent, the roller 421 contacts the insulating sheet 10 and directly presses the base plate 410. However, in this case, the base plate 410 may be damaged by repeated pressurization by the roller 421, and thus, when the entire base plate 410 is replaced, there is a problem of high replacement cost.

[0113] To this end, in the present invention, a replaceable roller pressure plate 430 is further provided between the roller support 422 and the base plate 410. More specifically, the roller pressure plate 430 is replaceably provided on the upper surface of the base plate 410, and the roller support 422 is provided on the upper surface of the roller pressure plate 430. Such a roller pressure plate 430 plays the following role: when the insulating sheet 10 passes through the lower end of the roller 421, the bending portion of the insulating sheet 10 is placed on the roller pressure plate 430, and when bending, the roller pressure plate 430 supports the pressure of the roller 421. In addition, the roller pressure plate 430 can use a material with excellent durability, such as a metal material such as steel or aluminum.

[0114] The insulating sheet guides 440 and 450 guide the insulating sheet 10 to an accurate bending position during the secondary bending of the insulating sheet 10. The insulating sheet guides 440 and 450 are composed of an inner sheet guide 440 that contacts and supports the inner side of the insulating sheet 10 during the bending, and an outer sheet guide 450 that contacts and supports the outer side of the insulating sheet 10. The inner side of the insulating sheet 10 refers to the side surface 13 of the insulating sheet 10 (see Figure 2 ) end, the outer side of the insulating sheet 10 refers to the vertical surface 11 of the insulating sheet 10 (refer to Figure 2 ).

[0115] The sheet inner side guide 440 is in the form of a long rectangular plate. The sheet inner side guide 440 is arranged on the inner side of the roller 421 on the upper surface of the roller pressure plate 430 to support the inner side of the insulating sheet 10. This sheet inner side guide 440 directly contacts the insulating sheet 10. Preferably, a material with less friction is selected, such as a plastic material such as PC, POM, ABS, etc. In addition, the sheet inner side guide 440 can be arranged on both sides of the left and right directions with the roller 421 as a reference according to the convenience of the operator, or can be selectively assembled only on one side in any direction. At this time, the sheet inner side guide 440 is arranged on the roller pressure plate 430 with a structure that can change its position along the left and right direction (X-axis direction), so that the length of the insulating sheet 10 can be flexibly handled.

[0116] The sheet outer guide 450 is in the form of a rectangular block, and is disposed on the upper surface of the base plate 410 on the outer side of the roller 421 to support the outer side (vertical surface 11) of the insulating sheet 10. This sheet outer guide 450 is also in direct contact with the insulating sheet 10, and preferably, a material with less friction is selected, such as a plastic material such as PC, POM, ABS, etc. In addition, the sheet outer guide 450 can also be disposed on both sides of the left and right directions with the roller 421 as a reference according to the convenience of the operator, or can be selectively assembled only on one side in any direction. At this time, the sheet outer guide 450 is disposed on the base plate 410 with a structure that can change its position along the left and right direction (X-axis direction), so that the length of the insulating sheet 10 can be flexibly coped with.

[0117] As described above, the sheet inner guide 440 and the sheet outer guide 450 are arranged on the inner and outer sides with reference to the roller 421, and support the inner and outer sides of the insulating sheet during the secondary bending of the insulating sheet, thereby providing the insulating sheet with a bending allowable width ( Fig.15 At this time, the sheet inner guide 440 and the sheet outer guide 450 can change their positions along the front-back direction (Y-axis direction), so the bending allowable width ('A') can be flexibly adjusted according to the size of the insulating sheet.

[0118] Below, refer to Figures 16a to 16c The operation of performing secondary bending on the insulating sheet by the secondary bending device 400 will be described.

[0119] First, if Fig.16a As shown, if the insulating sheet 10 is moved while the primary bent portion of the insulating sheet 10 is obliquely sandwiched between the roller 421 and the roller pressure plate 430 , the roller 421 rotates and the primary bent portion of the insulating sheet 10 is naturally located below the roller 421 .

[0120] Thereafter, as shown in FIG16 b , when the primary bent portion of the insulating sheet 10 is located below the roller 421 , the entire surface of the insulating sheet is horizontally aligned with the roller press plate 430 . Thus, an initial position for secondary bending is set.

[0121] Finally, if Fig.16c As shown in the figure, when the surfaces of the roller pressure plate 430 and the insulating sheet 10 are horizontally aligned, if the insulating sheet 10 is moved in the direction in which the insulating sheet is sandwiched (arrow direction), the primary bent portion of the insulating sheet 10 passes between the roller 421 and the roller pressure plate 430, and is bent twice at a predetermined pressure and interval. While the insulating sheet 10 passes between the roller 421 and the roller pressure plate 430, the outer side and the inner side of the insulating sheet 10 contact the sheet outer side guide 450 and the sheet inner side guide 440, so that the insulating sheet 10 can be linearly moved at a fixed position.

[0122] Fig.17The bending states of the insulating sheet of the present invention are shown in sequence, i.e., the state of being bent once to a predetermined angle by a press punch and the state of being bent twice by a press roller. As described above, in one embodiment of the present invention, the first bending and the second bending are performed in sequence by a press punch and a press roller, so that even if the insulating sheet made of a very thin plastic material is bent, the rebound phenomenon of the bent portion returning to its original shape is avoided, so that the original bent shape can be permanently maintained, and therefore, the insulating sheet is firmly fixed to the side surfaces of the battery bracket, so that even if it is subjected to external impact, it will not be detached from the bracket, and the battery module can be stably insulated.

[0123] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will appreciate that various modifications and changes may be made to the present invention without departing from the concept and scope of the present invention as described in the claims.

Claims

1. A method for manufacturing an insulating sheet, characterized in that: include: A preparation step (S10) of preparing a planar sheet having a molding groove formed thereon; A first cutting step (S20) of irradiating a laser beam from a side of the sheet to cut a side of the molded groove; a second cutting step (S30) of irradiating a laser beam from the upper side of the molded groove whose side is cut, so as to cut the insulating sheet in which the molded groove is completely separated from the sheet; an adhesive tape attaching step (S40), attaching an adhesive tape to the outer side of the insulating sheet; and The bending step (S50) is to bend one end portion of the surface of the insulating sheet to which the adhesive tape is attached into a shape bent toward a direction in which the adhesive tape is attached.

2. The method for manufacturing an insulating sheet according to claim 1, characterized in that: The insulating sheet (10) has an "L" shaped cross section and is composed of a vertical surface (11), a bottom surface (12) forming a right angle at the lower end of the vertical surface (11), and side surfaces (13) connected to the vertical surface (11) and the bottom surface (12) to form two side surfaces of the insulating sheet (10), and a notch (12b) is formed on the front side portion of the bottom surface (12) connected to the side surface (13).

3. The method for manufacturing an insulating sheet according to claim 2, characterized in that: In the first cutting, a horizontal cut of a prescribed length is made at the upper end of the corner where the vertical surface (11) and the side surface (13) meet, and the cut is made toward the bottom surface (12).

4. The method for manufacturing an insulating sheet according to claim 3, characterized in that: In the second cutting, the cutting is performed in a manner that a notch (12b) is formed on the front side of the bottom surface (12) connected to the side surface (13), and the cutting is performed in a straight line shape in the entire width direction of the bottom surface (12).

5. The method for manufacturing an insulating sheet according to claim 2, characterized in that: In the adhesive tape attaching step, the adhesive tape (40) is attached to the bottom surface (12), The bending in the bending step is achieved by bending the end of the bottom surface (12) toward the direction in which the adhesive tape (40) is attached.

6. The method for manufacturing an insulating sheet according to claim 5, characterized in that: The insulating sheet is made of a thin film of plastic material.

7. The method for manufacturing an insulating sheet according to claim 6, characterized in that: The bending in the bending step includes a primary bending step of bending at a predetermined angle by pressing with a pressing punch and a secondary bending step of further bending the primary bent portion by rotating and pressing with a roller.

8. An insulating sheet manufacturing device, characterized in that: The insulating sheet manufacturing device is a device for manufacturing an insulating sheet according to the manufacturing method described in any one of claims 1 to 7, comprising a tape attaching device (200) for adsorbing and fixing the insulating sheet in the tape attaching step, The adhesive tape attaching device (200) comprises: a sheet suction fixture (210) for mounting the insulating sheet (10), the sheet suction fixture (210) comprising a fixture body (211), the fixture body (211) being formed with a first suction space (212) with an open lower portion and an empty interior, and a surface of the fixture body (211) on which the insulating sheet (10) is mounted being formed with a plurality of suction holes (213); and A clamp base (220) is provided for providing suction to the sheet suction clamp (210) by combining with the sheet suction clamp (210). The clamp base (220) is composed of a base (221). The base (221) is provided with a second suction space (222) which is open at the top and empty inside. The second suction space (222) and the first suction space (212) together form a closed space. A connection port (224) connected to a vacuum pipe is formed on a side surface of the base (221) which forms the second suction space (222).

9. The insulating sheet manufacturing device according to claim 8, characterized in that: The upper end of the second suction space (222) forms a step surface with a cross-sectional area wider than that of the second suction space (220), thereby forming a placement surface (223) for placing the sheet suction jig (210).

10. The insulating sheet manufacturing device according to claim 8, characterized in that: It also includes a primary bending jig base (300) for performing a primary bending on the insulating sheet in the bending step. The primary bending fixture base (300) comprises: A base body (310) is in close contact with the inner side surface of the insulating sheet (10), and a receiving groove (311) for receiving a press punch (340) is formed on the surface of the base body (310) facing the curved surface of the insulating sheet (10); and An upper plate (320) is arranged at the rear side of the receiving groove (311) in the base body (310), and the upper plate (320) forms a clamping space (321) for clamping the end of the insulating sheet (10).

11. The insulating sheet manufacturing device according to claim 10, characterized in that: The one-time bending fixture base (300) further comprises a lower plate (350) which is arranged on the front side of a surface of the base body (310) which forms a right angle with the bent surface of the insulating sheet (10) to prevent the insulating sheet (10) from being pushed forward when the insulating sheet (10) is bent.

12. The insulating sheet manufacturing device according to claim 11, characterized in that: In order to variably install the front and rear positions of the upper plate (320) and the lower plate (350) on the base body (310), a plurality of clamping protrusions (322, 351) are formed on the front surfaces of the upper plate (320) and the lower plate (350) at a prescribed interval along the width direction of each plate (320, 350), and a plurality of clamping grooves (312, 313) are formed on the upper surface of the base body (310) at positions corresponding to the clamping protrusions (322, 351) at a prescribed interval along the width direction of the base body (310).

13. The insulating sheet manufacturing device according to claim 10, characterized in that: It also includes a secondary bending device (400) for performing secondary bending on the insulating sheet (10) in the bending step, The secondary bending device (400) comprises: A base plate (410) for placing the insulating sheet (10); a pressurizing roller module (420) which is disposed on the upper portion of the base plate (410) and pressurizes and bends the primary bending portion of the insulating sheet (10) by rotating a roller (421); and The inner guide (440) and the outer guide (450) of the sheet are respectively arranged on the upper part of the base plate (410) along the front-to-back direction of the roller (421) with the roller (421) as a reference. During the bending of the insulating sheet (10), the inner guide (440) and the outer guide (450) of the sheet abut against the inner and outer sides of the insulating sheet (10) to guide the accurate bending position of the insulating sheet (10), wherein the front-to-back direction is the Y-axis direction.

14. The insulating sheet manufacturing device according to claim 13, characterized in that: The pressure roller module (420) comprises: a roller bracket (422) composed of a lower bracket (422a) fixedly arranged on the upper part of the base plate (410) and an upper bracket (422b) variably arranged on the upper part of the lower bracket (422a) along the front-to-back direction, wherein the front-to-back direction is the Y-axis direction; and A roller mounting plate (423) is variably arranged on the front surface of the upper bracket (422b) along the up-down direction, and a roller (421) is rotatably mounted on the lower part of the roller mounting plate (423), wherein the up-down direction is the Z-axis direction.

15. The insulating sheet manufacturing device according to claim 13, characterized in that: A roller pressure plate (430) is replaceably arranged on the upper surface of the base plate (410), and the pressure roller module (420) is arranged on the roller pressure plate (430). During the bending of the insulating sheet (10), the insulating sheet (10) is placed on the roller pressure plate (430), and the roller pressure plate (430) supports the pressure of the roller (421).

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