Pouch bending guide device and pouch bending method for secondary battery packaging system

Abstract

The structure of the present invention is a bag bending guide device for a secondary battery packaging system, characterized in that, when a bag sheet (2A) is arranged on a base clamp (30) and a bending clamp (20), the bending clamp (20) folds the bag sheet (2A) toward the side of the base clamp (30) and folds the bag sheet (2A) so that the battery unit is built into the bag (2), and the bag bending guide device includes: a bending knife (40), the bending knife (40) inner side supporting the curved side surface (2BS) of the bag (2) formed when the bag sheet (2A) is folded by the bending clamp (20).

Description

Technical Field

[0001] The present invention relates to a bag bending guide device and bag bending method for a secondary battery packaging system. More specifically, the present invention relates to a bag bending guide device and bag bending method for a secondary battery packaging system that can prevent the curved side surface of a bag from deforming concavely during the bending operation of the folded bag. The present invention relates to a bag bending method for a secondary battery packaging system, which is used to prevent a bent bag from entering a bag chamber using a bending blade. Preventing the bag from entering the bag chamber refers to preventing the curved side surface of one side of the bag from being pushed into the bag chamber when the bag is formed by folding the bag sheets. Background Art

[0002] Secondary batteries are rechargeable and can be miniaturized and increased in capacity. Secondary batteries can be categorized as can-type or pouch-type based on the shape of their outer casing. Pouch-type batteries consist of a battery cell with electrode tabs formed on one side of the plates, and a pouch that encases the plates and seals them to allow the electrode tabs to be extended to the outside. A battery cell has a separator sandwiched between multiple positive and negative plates. The pouch houses and seals the battery cells, with the electrode tabs on one side of the cells extended to the outside of the pouch. This type of pouch-housed secondary battery is called a pouch-type secondary battery.

[0003] At this time, when forming a pouch for internally storing the battery cell, the middle portion of the pouch sheet having the half-battery cell receiving portion is folded, thereby internalizing the battery cell in the battery cell receiving portion inside the pouch.

[0004] However, during the bending operation of folding the middle portion of the bag sheet, the middle portion of the bag sheet is pushed inward, causing the curved side of the bag to deform concavely inward. In other words, when the bag sheet is folded, the curved side of the bag 2 is concave inward, causing problems such as collapse.

[0005] In the case of a battery without a bottom, when the pouch is bent, the pouch enters the pouch chamber, causing the pouch chamber size to decrease. This "pouch entering the pouch chamber" refers to the phenomenon in which the curved side of the pouch 2 is pushed into the pouch when the pouch sheets are folded to form the pouch. As described above, when the pouch 2 is bent, the pouch chamber size decreases due to the pouch entering the pouch chamber.

[0006] In addition, when the curved side of the bag is deformed inwardly into a concave shape, the heat generated during the charging and discharging operations of the battery cells of the secondary battery will not be properly discharged. A plurality of bags containing built-in battery cells (hereinafter referred to as bags) are placed vertically side by side on a hanger, and the curved side of the bag is in contact with a heat sink (a metal plate with high thermal conductivity, such as an aluminum plate) provided at the bottom of the hanger. In the above state, when the battery cells are charged and discharged, the heat generated in the bag is conducted from the curved side through the heat sink and discharged. At this time, if a concave deformation portion is generated inwardly on the curved side of the bag, the concave deformation portion will not be in a state of properly contacting the heat sink, and thus the heat generated in the bag during the charging and discharging operations of the battery cells will not be properly transferred from the curved side through the heat sink, resulting in the problem of not being able to properly discharge the heat generated inside the bag during the charging and discharging operations of the battery cells. When the heat cannot be properly discharged in the bag, the battery cells may deteriorate or burn due to heat. Summary of the Invention

[0007] (1) Technical issues to be solved

[0008] The present invention aims to provide a bag bending guide device and a belt bending method for a secondary battery packaging system with a novel structure, which can prevent the curved side surfaces of the bag from becoming concave during the bending process of placing battery cells on a bag sheet and folding the base jig and bending jig, and smoothly discharge heat generated during charging and discharging of the secondary battery cells from the bag. Specifically, the main purpose of the present invention is to prevent the curved side surfaces of the bag from becoming concave during the process of bending the bag sheet to insert the battery cells into the bag.

[0009] (2) Technical solution

[0010] According to the present invention for solving the technical problems described above, a bag bending guide device for a secondary battery packaging system is provided, characterized in that when a bag sheet is set on a base clamp and a bending clamp, the bending clamp folds the bag sheet while folding toward the side of the base clamp, and the bag bending guide device includes: a bending knife that supports the curved side surface of the bag formed when the bag sheet is folded by the bending clamp on the inner side.

[0011] (3) Beneficial effects

[0012] The present invention has the effect of preventing the middle part of the bag sheet from being pushed inward during the bending operation of the middle part of the folded bag sheet, thereby solving the problem of the curved side surface of the bag being deformed inwardly into a concave shape.

[0013] In addition, since the curved side surface of the bag does not push inward, the appearance quality of the bag is improved, and the reliability of the bag is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a photograph showing a portion of a conventional bag in which the curved side surface is recessed inward to form a concave deformed portion.

[0015] Figure 2 is a plan view of an expanded state of a base jig and a bending jig as main parts of a pouch bending guide device of a secondary battery packaging system according to the present invention, and a pouch sheet disposed on the base jig and the bending jig in the expanded state.

[0016] Figure 3 It shows Figure 2 A perspective view of a portion of the bending fixture is shown.

[0017] Figure 4 It shows Figure 2 A perspective view of a portion of the base fixture is shown.

[0018] Figure 5 It is a perspective view showing the curved blade portion which is the main part of the present invention.

[0019] Figure 6 yes Figure 5 rear view.

[0020] Figure 7 It is shown in Figure 2 The side view shows a state in which the bending jig is folded toward the base jig and the bending blade is inserted into the inner side of the bag sheet.

[0021] Figure 8 It is shown in the enlarged Figure 7 The bag sheet is shown in a side view showing the state before the stopper contacts the curved side surface of the bag when the bag sheet is folded to form the bag.

[0022] Figure 9 It is shown in the enlarged Figure 7 The side view shows a state in which a stopper contacts a curved side surface of a bag when the bag sheet is folded to form a bag.

[0023] Best Practice

[0024] The present invention is a bag bending guide device for a secondary battery packaging system. When the bag sheet is set on a base clamp and a bending clamp, the bending clamp folds the bag sheet toward the side of the base clamp while folding the bag sheet. As a preferred embodiment, the bag bending guide device of the secondary battery packaging system includes a bending knife, which supports the curved side surface of the bag formed when the bag sheet is folded by the bending clamp on the inner side. A stopper is provided on the bending knife. When the bag sheet is folded by the bending clamp, the bending knife advances toward the inner side of the bag sheet, so that the stopper supports the inner side surface of the curved side surface of the bag. DETAILED DESCRIPTION

[0025] The present invention is a bag bending guide device for a secondary battery packaging system that folds the bag sheet 2A by folding the bending jig 20 toward the base jig 30 after the bag sheet 2A is placed on the base jig 30 and the bending jig 20. The present invention is characterized by the provision of a bending blade 40 as a main component. The bending blade 40 internally supports the curved side surface 2BS of the bag 2 formed when the bag sheet 2A is folded by the bending jig 20 to prevent the curved side surface 2BS of the bag 2 from concaving inward, and the provision of a stopper 42 on the bending blade 40 to internally support the curved side surface 2BS.

[0026] The base fixture 30 is positioned with its inner side facing upward. It is constructed in the shape of a rectangular plate. A concave half-slot-shaped pouch-type battery cell receiving groove is provided on the inner side of the base fixture 30. Two half-slot battery cell receiving portions are provided with their center as a reference point in the pouch sheet 2A used to form the pouch 2 for the internal battery cells. These pouch-type battery cell receiving portions are rectangular grooves protruding outward from the pouch sheet 2A. Therefore, the half-slot battery cell receiving grooves of the base fixture 30 are constructed in a rectangular groove shape to accommodate these half-slot battery cell receiving portions.

[0027] While supported by the support frame, the bending jig 20 is folded toward the inner side of the base jig 30 by a bending drive unit (not shown), and then unfolded outward from the inner side of the base jig 30. A concave half-section pouch-type battery cell receiving groove is also provided on the inner side of the bending jig 20. The pouch-type battery cell receiving groove of the bending jig 20 is also rectangular.

[0028] The base jig 30 is mounted on the support frame, and one sidewall of the base jig 30 and the bending jig 20 are connected to each other via a hinge. The bending jig 20 folds toward the inner side of the base jig 30 so that the inner side of the base jig 30 and the bending jig 20 face each other, and the bending jig 20 unfolds from the inner side of the base jig 30 to the outside. The base jig 30 and the bending jig 20 are constructed in the shape of a plate with a pouch-type battery cell receiving portion provided therein. With the hinge as a reference, the bending jig 20 folds toward the base jig 30 and unfolds from the base jig 30.

[0029] When the bending jig 20 is unfolded from the base jig 30 , the inner side surface of the bending jig 20 faces upward.

[0030] Preferably, vacuum suction channels are provided within the base jig 30 and the bending jig 20, and a plurality of vacuum suction holes are provided on the facing inner sides of the base jig 30 and the bending jig 20, communicating with the vacuum suction channels. The vacuum suction holes of the base jig 30 are connected to the internal vacuum suction channels of the base jig 30 and are open to the inner side of the base jig 30. Furthermore, the vacuum suction holes of the bending jig 20 are similarly connected to the internal vacuum suction channels of the bending jig 20 and are open to the inner side of the bending jig 20.

[0031] The outer side of the bag sheet 2A placed on the inner side of the base jig 30 and the bending jig 20 is disposed to face the vacuum suction holes of the base jig 30 and the vacuum suction holes of the bending jig 20 .

[0032] The vacuum suction channel and vacuum suction holes inside the base jig 30 and the vacuum suction channel and vacuum suction holes inside the bending jig 20 are connected to a vacuum device (not shown) via a connecting hose, a vacuum connection block, and a vacuum pressure charging block. The vacuum device draws air in through the vacuum suction holes on the inner side surfaces of the base jig 30 and the bending jig 20, thereby allowing the bag sheet 2A to be tightly attached to the inner side surfaces of the base jig 30 and the bending jig 20 by vacuum.

[0033] The vacuum suction channels of the base jig 30 and the bending jig 20 are connected to a vacuum device via an unillustrated connection device, such as a hose. With the base jig 30 and the bending jig 20 operating under the vacuum device, the bending jig 20 folds toward the base jig 30 or unfolds about the hinge portion. Of course, the bending jig 20 can be moved to or from the folding base jig 30 by an unillustrated bending operation device. The bending operation device can utilize a known device, such as a pneumatic cylinder, and therefore a detailed description thereof will be omitted.

[0034] The pouch sheet 2A is placed on the base jig 30 and the bending jig 20, and the battery cells are accommodated in one of the pair of half-battery cell accommodating portions of the pouch sheet 2A, which is arranged on the base jig 30. With the two half-battery cell accommodating portions of the pouch sheet 2A positioned within each of the pouch-type battery cell accommodating grooves within the base jig 30 and the pouch-type battery cell accommodating grooves of the bending jig 20, the pouch sheet 2A is folded while the bending jig 20 is folded toward the base jig 30. By folding the pouch sheet 2A, a pouch 2 containing battery cells is formed within the internal battery cell accommodating portion. Of course, in an empty state where no battery cells are placed in the two half-battery cell accommodating portions of the pouch sheet 2A, the pouch 2 can be formed by folding the pouch sheet 2A in half with the center of the pouch 2A as a reference. In the pouch 2 where no battery cells are placed, one side surface will also serve as a folded side surface.

[0035] At this time, one side wall of the base jig 30 and the bending jig 20 are connected to each other by a hinge portion, and a bending guide opening portion OP is formed on one side wall of the base jig 30 and the bending jig 20, which is connected on the inner and outer surfaces. The bending guide opening portion OP is formed on one side wall of the base jig 30 and also on one side wall of the bending jig 20. The bending guide opening portion OP is configured to connect from one side side of the pouch-type battery cell accommodating portion seating groove formed inside the base jig 30 and the bending jig 20, respectively, to one side wall of the base jig 30 and one side wall of the bending jig 20. The bending guide opening portion OP may be a guide hole that guides the curved side surface 2BS of the bag 2 outward when pushed by the stopper 42 described below, thereby preventing the curved side surface 2BS of the bag 2 from being recessed toward the inner side of the bag 2.

[0036] The present invention is characterized in that a bending knife 40 is provided to support the curved side surface 2BS of the bag 2 on the inner side when the bag sheet 2A is folded.

[0037] The base jig 30 and the bending jig 20 move along a moving path, and when stopped, the bending jig 20 folds toward the base jig 30. When the moving path is a track, the base jig 30 and the bending jig 20 move along the track, and when stopped, the bending jig 20 folds toward the base jig 30. When the moving path is a turntable, the base jig 30 and the bending jig 20 mounted on the turntable move along the rotation of the turntable, and when stopped, the bending jig 20 folds toward the base jig 30.

[0038] The curved blade holder 50 is disposed to the side of the travel path. If the travel path is a turntable, the curved blade holder 50 is disposed to the side of the turntable. A lifting drive motor 62 is mounted on the curved blade holder 50. The motor shaft of the lifting drive motor 62 is vertically disposed. A lifting ball screw is disposed on the motor shaft of the lifting drive motor 62.

[0039] The curved tool holder 50 is provided with a linear guide (LM GUIDE). The linear guide includes a guide rail and a guide rail block. The guide rail is arranged vertically on the curved tool holder 50. The guide rail block is slidably coupled to the guide rail. When viewing the curved tool holder 50 from the front, the guide rails are arranged side by side in a pair of left and right sides.

[0040] The bending blade support frame 60 is coupled to the bending blade frame 50. The bending blade support frame 60 is coupled to the bending blade frame 50 in a vertically movable manner via a linear sliding guide. The bending blade frame 50 is coupled to a guide rail block of the linear sliding guide, thereby forming a structure in which the bending blade support frame 60 is coupled to the bending blade frame 50 in a movable manner.

[0041] The bending knife support frame 60 is equipped with a lifting ball screw nut. Preferably, the lifting ball screw nut is located at the center of the bottom surface of the bending knife support frame 60. The motor shaft of the lifting drive motor 54 provided in the bending knife frame 50 is equipped with a lifting ball screw, and the lifting ball screw nut provided in the bending knife support frame 60 is coupled to the lifting ball screw. Therefore, as the motor shaft of the drive motor rotates, the bending knife support frame 60 can be raised and lowered on the bending knife frame 50 via the lifting ball screw and the lifting ball screw nut.

[0042] The bending knife support frame 60 is provided with a linear sliding guide rail. A tilting frame 62 is provided on the upper portion of the bending knife support frame 60. When viewed from the side of the bending knife support frame 60, the front end portion of the tilting frame 62 is set to be lower than the rear end portion. That is, the tilting frame 62 is tilted in such a way that its rear side is higher than the front side. The tilting frame 62 is provided with a linear sliding guide rail. The linear sliding guide rail provided on the tilting frame 62 is composed of a guide rail and a guide rail block. When viewed from above the tilting frame 62, a pair of left and right guide rails are provided side by side on the tilting frame 62. The pair of left and right guide rails extend along the length direction of the tilting frame 62. The guide rail block is slidably coupled to the pair of guide rails.

[0043] A drive motor 64 is mounted at the rear end of the tilting frame 62. Since the tilting frame 62 is similar in structure to the curved blade support frame 60, the drive motor 64 is mounted on the curved blade support frame 60. A ball screw is mounted on the motor shaft of the drive motor 64. The ball screw BS, mounted on the motor shaft of the drive motor 64, extends along the length of the tilting frame 62.

[0044] The movable frame is coupled to a linear sliding guide provided on the tilting frame 62 of the bending blade support frame 60. The movable frame is coupled to a guide rail block that is slidably coupled to the guide rail of the tilting frame 62. The movable frame can slide on the tilting frame 62 of the bending blade support frame 60 via the linear sliding guide. In other words, the movable frame can move forward and backward on the tilting frame 62 of the bending blade support frame 60. The movable frame is configured to move forward and backward in a tilted state on the bending blade support frame 60.

[0045] The tilting frame 62 is mounted with a drive motor 64. A ball screw BS is mounted on the motor shaft of the drive motor 64. The movable frame is also equipped with a ball screw nut BSN, which is coupled to the ball screw BS. Therefore, as the motor shaft of the drive motor 64 and the ball screw BS mounted on the tilting frame 62 rotate, the ball screw nut BSN moves linearly along the ball screw BS, allowing the movable frame to move forward and backward on the tilting frame 62. The movable frame can move forward and backward in a tilted position on the curved blade support frame 60.

[0046] The movable frame is provided with a curved blade 40. The curved blade 40 is plate-shaped. The curved blade 40 is mounted on the movable frame so that the front side is lower than the rear side. The front bottom surface of the curved blade 40 is horizontal. When the curved blade 40 is attached to the movable frame and viewed from the side, the front bottom surface of the curved blade 40 is horizontal.

[0047] The curved blade 40 is provided with a stopper 42 for supporting the inner side surface of the curved side surface 2BS of the bag 2. The curved blade 40 is provided with a stopper receiving groove that connects from the interior to the upper surface. The stopper 42 is positioned and coupled to the stopper receiving groove. The stopper 42 protrudes further forward than the front side of the curved blade 40. The front end of the stopper 42 can be configured as a curved surface or a flat surface. A curved guide opening OP is formed on one side wall of the base fixture 30 and the curved fixture 20, connecting the inner and outer surfaces. The width of the stopper 42 can be the same as or slightly smaller than the width of the curved guide opening OP.

[0048] On the other hand, the present invention provides a bag bending method for a secondary battery packaging system, which includes: a bag bending step, in which the bag sheet 2A is set on a base clamp 30 and a bending clamp 20, and the bag sheet 2A is folded while the bending clamp 20 is folded toward the side of the base clamp 30; and a bag bending side supporting step, in which when the bag sheet 2A is folded by the bending clamp 20, the bending knife 40 is advanced to the inner side of the folded bag sheet 2A to support the curved side 2BS of the bag 2 formed in the bending operation of the bag sheet 2A on the inner side.

[0049] According to the present invention of the structure, the stopper 42 is provided on the bending knife 40, so when the bag sheet 2A is folded by the bending jig 20, the bending knife 40 advances to the inner side of the bag sheet 2A so that the stopper 42 supports the inner side of the bent side surface 2BS of the bag 2.

[0050] Specifically, the base jig 30 and the bending jig 20 are unfolded with their hinged connection as a reference, and the bag sheet 2A is in an unfolded state on the inner side surfaces of the unfolded base jig 30 and the bending jig 20. In this state, when the bending jig 20 is folded toward the base jig 30 with the hinge as a reference, the bag sheet 2A is also folded in half from the unfolded state. The above is the bag bending step.

[0051] As the bending jig 20 and half of the bag 2A fold toward the base jig 30 and the remaining half of the bag 2A, the bending blade 40 advances and enters the inner side of the folded bag 2A. As the motor shaft and ball screw of the drive motor mounted on the tilting frame 62 of the bending blade support frame 60 rotate to one side, the movable frame advances via the ball screw nut and ball screw, advancing the bending blade 40 mounted on the movable frame and entering the inner side of the bag 2A. While the bending jig 20 is folded toward the base jig 30 at least within an acute angle, the bending blade 40 advances and enters the inner side of the bag 2A.

[0052] The bending blade 40 enters the inner side of the folded bag sheet 2A, whereupon the stopper 42 provided on the bending blade 40 supports the inner side of the curved side 2BS of the bag 2. As the bag 2 is bent, the stopper 42 widens the area of ​​the curved side 2BS of the bag 2, thereby pushing a larger portion of the bent bag. The above is the step of supporting the curved side of the bag.

[0053] As described above, since the stopper 42 supports the curved side surface 2BS of the bag 2 from the inside, it prevents the curved side surface 2BS of the bag 2 from being pushed inward. The front end of the stopper 42 can be formed as a curved surface or a flat surface, with the curved surface or flat surface of the stopper 42 supporting the curved side surface 2BS of the bag 2 from the inside. In this case, a curved guide opening OP is formed on one side wall of the base jig 30 and the bending jig 20, connecting the inner and outer surfaces. The stopper 42 of the bending blade 40 pushes the curved side surface 2BS of the bag 2 outward through the curved guide opening, thereby preventing the curved side surface 2BS of the bag 2 from being pushed inward. The stopper 42 pushes the curved side surface 2BS, thereby preventing the curved side surface 2BS of the bag 2 from being pushed inward.

[0054] On the other hand, when the bending jig 20 and the bag half 2A are folded close to the upper surface side of the bending knife 40, the bending knife 40 and the stopper 42 retreat to exit outward from the bending jig 20 and the bag half 2A. As the motor shaft and the ball screw BS of the driving motor 64 of the tilting frame 62 mounted on the bending knife support frame 60 rotate in the other direction, the moving frame retreats via the ball screw nut BSN and the ball screw BS, and the bending knife 40 and the stopper 42 mounted on the moving frame retreat to exit outward from the inner side of the bag 2A. When the bending jig 20 and the bag half 2A are folded close to the upper surface of the bending knife 40, the curved side surface 2BS of the bag 2 will no longer be pushed into the inner side of the bag 2. Therefore, when the bending jig 20 and the bag half 2A are folded close to the upper surface of the bending knife 40, the bending knife 40 and the stopper 42 retreat, thereby withdrawing outward from the bending jig 20 and the bag half 2A. When the bending knife 40 and the stopper 42 withdraw outward from the bending jig 20 and the bag half 2A, the bending jig 20 and the bag half 2A are completely folded toward the base jig 30 and the remaining bag half 2A, thereby forming a bag 2 with two overlapping bag halves 2A.

[0055] Therefore, the present invention prevents the middle portion of the bag sheet 2A from being pushed inward during the bending operation of the middle portion of the folded bag sheet 2A, thereby solving the problem of the curved side surface 2BS of the bag 2 being deformed inwardly into a concave shape. In other words, the present invention solves the problem of the curved side surface 2BS of the bag 2 being concave inward when the bag sheet 2A is folded, thereby solving the problem of the bag 2 being concave inwardly when the bag sheet 2A is folded.

[0056] Conventionally, in the case of a battery without a bottom, when the pouch 2 is bent, the pouch 2 enters the pouch chamber, resulting in a problem in which the size of the pouch chamber is reduced.

[0057] However, the present invention incorporates a stopper 42 on the knife and the jig (i.e., the base jig 30 and the bending jig 20) to prevent the bag 2 from entering the bag chamber. The phenomenon of bag 2 entering the bag chamber refers to the phenomenon that the curved side surface 2BS of one side of the bag 2 is pushed into the interior of the bag 2 when the bag 2 is formed by folding the bag sheet 2A. By preventing the bag 2 from entering the bag chamber when the bag 2 is bent, the present invention solves the problem of the bag chamber size of the bag 2 being reduced.

[0058] Since the phenomenon that the curved side surface 2SB of the bag 2 is pushed inward does not occur, the appearance quality of the bag 2 is improved, and the reliability of the bag 2 is improved.

[0059] Furthermore, the problem of heat generated during charging and discharging of the secondary battery cells not being properly dissipated when the curved side surfaces 2BS of the pouches 2 containing the internal battery cells are deformed concavely inward is resolved. Multiple pouches 2 containing internal battery cells (hereinafter referred to as pouches 2) are placed vertically side by side on a hanger, with the curved side surfaces 2BS of the pouches 2 contacting a heat sink disposed at the bottom of the hanger. Heat generated within the pouches 2 during charging and discharging operations in this state is conducted from the curved side surfaces 2BS through the heat sink and dissipated. Since the curved side surfaces 2BS of the pouches 2 do not deform inwardly, the concave deformation of the pouches 2 prevents the concave deformation from preventing proper contact with the heat sink. Instead, the curved side surfaces 2BS of the pouches 2 protrude further from the side of the pouches 2 or are formed flat, ensuring proper contact with the heat sink. Consequently, heat generated within the pouches 2 during charging and discharging operations is properly transferred from the curved side surfaces 2BS to the heat sink, effectively dissipating heat generated within the pouches 2 during charging and discharging operations.

[0060] Furthermore, since the bag 2 dissipates heat normally, there is an effect of solving the problem of thermal degradation or burning of the battery cells.

[0061] In addition, in the present invention, the bending knife 40 is installed on the bending knife support frame 60, and the bending knife support frame 60 is installed to the bending guide frame in a liftable manner, so the upper and lower positions of the bending knife 40 and the upper and lower positions of the stopper 42 of the bending knife 40 can be adjusted according to operating conditions, etc., so that the bending operation of the bag 2 and the like can be performed more smoothly.

[0062] In addition, the front bottom surface of the bending knife 40 is configured as a horizontal plane, so when the bending knife 40 enters or exits the inner side of the folded bag sheet 2A, the front bottom surface of the bending knife 40 will not be stuck by the bag sheet 2A, so the bag 2 forming operation by bending the bag sheet 2A can be achieved more smoothly.

[0063] Industrial Applicability

[0064] The present invention provides a bag bending guide device for a secondary battery packaging system, which folds the bag sheet while the bending clamp is folded toward the side of the base clamp when the bag sheet is set on a base clamp and a bending clamp. The bag bending guide device for the secondary battery packaging system is characterized in that it includes a bending knife, which supports the curved side surface of the bag formed when the bag sheet is folded by the bending clamp on the inner side, and thus has industrial applicability.

Claims

1. A bag bending guide device for a secondary battery packaging system, characterized in that: In a state where the bag sheet (2A) is set on the base jig (30) and the bending jig (20), the bending jig (20) is folded toward the side of the base jig (30) while folding the bag sheet (2A). The bag bending guiding device comprises: a bending knife (40) that supports on the inner side a curved side surface (2BS) of the bag (2) formed when the bag sheet (2A) is folded by the bending jig (20), The base fixture (30) and one side wall of the bending fixture (20) are connected to each other through a hinge portion, and the base fixture (30) and the one side wall of the bending fixture (20) are formed with a bending guide opening portion (OP) that is connected on the inner and outer surfaces. The curved guide opening portion (OP) is a guide hole that guides the curved side surface (2BS) of the bag (2) to be pushed outward when the stopper (42) pushes the inner surface of the curved side surface (2BS) of the bag (2), thereby preventing the curved side surface (2BS) of the bag (2) from being recessed toward the inside of the bag (2).

2. The bag bending guide device of the secondary battery packaging system according to claim 1, characterized in that: The curved knife (40) is provided with a stopper (42) for supporting the inner side of the curved side surface (2BS) of the bag (2).

3. The bag bending guide device of the secondary battery packaging system according to claim 2, characterized in that: The bending knife (40) moves forward toward the inner side of the bag sheet (2A) by moving the operating device, so as to prevent the bending side surface (2BS) from entering the inner side of the bag (2) through the stopper (42).

4. The bag bending guide device of the secondary battery packaging system according to claim 3, characterized in that: The bending knife (40) is arranged at an angle, so that when the bag sheet (2A) and the bending fixture (20) are folded together, the bending knife (40) is advanced to the inner side of the bag sheet (2A) through the moving operation device in an inclined state.

5. The bag bending guide device of the secondary battery packaging system according to claim 1, characterized in that: The bag sheet (2A) is arranged on the base clamp (30) and the bending clamp (20), and when the battery cell is accommodated in the half-battery cell accommodating portion arranged on the base clamp (30) in a pair of half-battery cell accommodating portions of the bag sheet (2A), the bag sheet (2A) is folded while the bending clamp (20) is folded toward the side of the base clamp (30). By folding the bag sheet (2A), a bag (2) with a battery cell built in the internal battery cell accommodating portion is formed. When the bag sheet (2A) is folded, the bending knife (40) enters the inner side of the bag sheet (2A) to support the curved side surface (2BS) of the bag (2) on the inner side.

6. The bag bending guide device of the secondary battery packaging system according to claim 1, characterized in that: A vacuum suction channel is provided inside the base fixture (30) and the bending fixture (20), and a plurality of vacuum suction holes communicating with the vacuum suction channel are provided on inner sides of the base fixture (30) and the bending fixture (20) facing each other.

7. The bag bending guide device of the secondary battery packaging system according to claim 6, characterized in that: While the bag sheet (2A) placed on the inner side surfaces of the base clamp (30) and the bending clamp (20) is vacuum-sucked through the vacuum suction holes of the base clamp (30) and the bending clamp (20), the bending clamp (20) is folded toward the inner side surface of the base clamp (30) to form a bag (2) in a state where the bag sheet (2A) is folded in half, and a battery cell is built into the battery cell accommodating portion inside the bag (2).

8. A bag bending method for a secondary battery packaging system, characterized in that: include: a bag bending step, in a state where the bag sheet (2A) is placed on a base jig (30) and a bending jig (20), and the bag sheet (2A) is folded while the bending jig (20) is folded toward the base jig (30); and a bag bending side supporting step, when the bag sheet (2A) is folded by the bending jig (20), advancing a bending knife (40) to the inner side of the folded bag sheet (2A) to support the bent side surface (2BS) of the bag (2) formed in the bending operation of the bag sheet (2A) on the inner side, The base fixture (30) and one side wall of the bending fixture (20) are connected to each other through a hinge portion, and the base fixture (30) and the one side wall of the bending fixture (20) are formed with a bending guide opening portion (OP) that is connected on the inner and outer surfaces. The curved guide opening portion (OP) is a guide hole that guides the curved side surface (2BS) of the bag (2) to be pushed outward when the stopper (42) pushes the inner surface of the curved side surface (2BS) of the bag (2), thereby preventing the curved side surface (2BS) of the bag (2) from being recessed toward the inside of the bag (2).

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