Battery cell stacking jig of secondary battery

Abstract

The disclosed invention relates to a battery cell stacking jig for a secondary battery for stacking a plurality of battery cells, comprising: forks that support both ends of the battery cells so that a plurality of battery cells are seated and are arranged in a plurality spaced apart in the horizontal direction; grippers that are movably provided on the upper part of the forks and are arranged in a plurality in the horizontal direction to load the battery cells vertically toward the forks so as to seat them within the forks; and a transfer (TRF) connected to the plurality of grippers to move the grippers to the upper part of the forks; wherein the forks can fix the battery cells by pressing both sides in the thickness direction.

Description

Technology Field

[0001] The present invention relates to a battery cell stacking jig for a secondary battery.

[0002] More specifically, the invention relates to a battery cell stacking jig capable of preventing movement of battery cells by applying a variable structure to a fork that vertically supports battery cells for stacking multiple battery cells. Background Technology

[0003] Recently, significant trends in the development of the electronics industry can be summarized as the wireless and mobile trends in devices, and the transition from analog to digital. Representative examples of this include the rapid proliferation of wireless telephones (also known as mobile phones) and laptop computers, as well as the transition from analog to digital cameras.

[0004] Along with these trends, research and development on secondary batteries are actively underway, and the types of applications using secondary batteries are becoming highly diversified due to their advantages. It is expected that secondary batteries will be applied to more fields and products in the future than they are today.

[0005] Here, secondary batteries are attracting attention not only as an energy source for portable devices such as mobile phones, laptops, and camcorders, but also for electric vehicles and hybrid electric vehicles, which are being proposed as solutions to address air pollution caused by conventional gasoline and diesel vehicles that use fossil fuels.

[0006] Generally, secondary batteries are classified according to the shape of the battery case into cylindrical batteries and prismatic batteries, in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type battery cells, in which the electrode assembly is embedded in a pouch-type case made of aluminum laminate sheets.

[0007] In addition, the electrode assembly embedded in the battery case is a power generation element capable of charging and discharging, having a structure comprising a positive plate, a negative plate, and a separator interposed between the positive plate and the negative plate. It is classified into a jelly roll type, which is wound with a separator interposed between long sheet-type positive plates and negative plates coated with respective active materials, and a stack type, which is formed by sequentially stacking a plurality of positive plates and negative plates of a predetermined size with a separator interposed between them.

[0008] These secondary batteries are classified into lithium-ion batteries, lithium-ion polymer batteries, lithium polymer batteries, etc., depending on the composition of the electrodes and electrolytes; typically, the electrodes of these lithium secondary batteries are formed by applying a positive or negative active material to a current collector, such as an aluminum or copper sheet, mesh, film, or foil, and then drying it.

[0009] Meanwhile, the secondary battery is utilized in the form of a module in which at least one battery cell is stacked.

[0010] To this end, as illustrated in FIG. 1, a stacking jig (100) of a battery cell comprises a plurality of forks (103) spaced apart at a certain distance in the thickness direction of the battery cell (101) so that a plurality of battery cells (101) are each seated thereon, a gripper (Gripper, 105) that loads vertically toward the forks (103) so that the battery cells (101) are seated inside the forks (103), and a TRF (Transfer, 107) connected to the plurality of grippers (105) to move the grippers (105) to the upper part of the forks (103).

[0011] And, the forks (103) arranged in multiple numbers are arranged to be movable in the horizontal direction, which is the thickness direction of the battery cell (101), and after the battery cell (101) is seated inside the fork (103) through the entrance of each fork (103), they move in the horizontal direction to stack multiple battery cells (101).

[0012] Here, an adhesive surface (not shown) is formed on the side of each battery cell (101) for stacking, and the adhesive surfaces of the battery cells (101) are bonded to each other and stacked by the movement of each fork (103), and the stacked battery cells (101) are then transferred to a subsequent process through another gripper (not shown).

[0013] Meanwhile, as shown in FIG. 2, the forks (103) are arranged in pairs spaced apart at a certain distance along the longitudinal direction of the battery cell (101) to support both ends of the battery cell (101), and one fork (103a, 103b) is arranged offset to avoid mutual interference with the other fork (103'a, 103'b) facing it, and a plurality of forks (103, 103') are arranged spaced apart at a certain distance in this arrangement.

[0014] As shown in FIG. 3(a), the battery cell stacking jig for a secondary battery described above had a problem in that when each battery cell (101) is seated on a plurality of forks (103), there may be a difference between the position of the gripper and the position of the forks, and as a result, the lower part of the battery cell (101) may be damaged by hitting the entrance of the forks (103).

[0015] To solve the aforementioned problem, the width of the fork on which the battery cell is seated is formed to be larger than the thickness of the battery cell, taking into account the tolerance of the battery cell, thereby stably seating and installing the battery cell within the fork.

[0016] However, as shown in Fig. 3(b), there is a problem in that the battery cell (101) seated on the fork (103) moves within the fork (103) by forming the width of the fork (103) larger than the thickness of the battery cell (101), and as a result, the alignment of the stacked battery cells is distorted, which causes a problem in that the quality of the product is degraded. Prior art literature

[0017] Republic of Korea Registered Patent No. 10-1486232 The problem to be solved

[0018] The present invention aims to solve the problems described above by providing a battery cell stacking jig that prevents movement of the battery cells and prevents damage to the battery cells during seating by improving the structure of a fork that vertically supports the battery cells for stacking a plurality of battery cells.

[0019] In addition, the present invention aims to provide a battery cell stacking jig capable of improving the stacking quality of battery cells and enhancing productivity and process line operability by applying a variable structure to a fork that vertically supports battery cells for stacking a plurality of battery cells. means of solving the problem

[0020] To achieve the above-mentioned objectives, the present invention comprises a battery cell stacking jig for a secondary battery for stacking a plurality of battery cells, wherein the jig supports both ends of the battery cells so that a plurality of battery cells are seated thereon and is arranged in a plurality spaced apart in the horizontal direction; a gripper movably provided on the upper part of the fork and arranged in a plurality in the horizontal direction to load the battery cells vertically toward the fork so as to seat them within the fork; and a transfer (TRF) connected to the plurality of grippers to move the gripper to the upper part of the fork; wherein the fork is characterized by pressing and fixing both sides of the battery cells in the thickness direction.

[0021] In one embodiment, the fork may include a seating portion on which the lower surface of a battery cell is seated, a vertical portion extending vertically from both ends of the seating portion, and a pressing means provided on each opposing inner side of the vertical portion.

[0022] As a specific embodiment, the pressurizing means may include a pressurizing plate installed facing each other on the inner side of each vertical part, and at least one elastic means connecting the pressurizing plate and the vertical part so that each pressurizing plate moves elastically to pressurize both sides of the battery cell entering the fork.

[0023] As another specific embodiment, the upper and lower corners of the pressure plate in contact with the lower part of the battery cell may be rounded to have curvature.

[0024] In another embodiment, the fork may include a seating portion on which the lower surface of a battery cell is seated, a vertical portion extending vertically from one end of the seating portion, and a moving pressure means provided at the other end of the seating portion.

[0025] As a specific embodiment, the moving pressure means may include a moving part formed vertically and movable in a horizontal direction relative to a seating part, a pressure plate installed on the inner side of the moving part, and at least one elastic means connecting the pressure plate and the moving part so as to elastically move and apply pressure to one side of a battery cell into which the pressure plate enters the fork.

[0026] In another specific embodiment, a coupling groove is formed at the other end of the seating portion, and a movable piece corresponding to the coupling groove is formed protrudingly on the inner lower part of the movable portion, and the movable portion can move horizontally relative to the seating portion while the movable piece is coupled to the coupling groove.

[0027] In another specific embodiment, the moving part may be movable relative to the seating part by means of an air cylinder or a motor.

[0028] As another specific embodiment, the upper and lower corners of the pressure plate in contact with the lower part of the battery cell may be rounded to have curvature.

[0029] In another embodiment, a position sensing sensor may be provided at the lower part of the gripper and at the upper part of the fork, respectively. Effects of the invention

[0030] According to the present invention, by improving the structure of a fork that vertically supports a plurality of battery cells for stacking, the movement of the battery cells is prevented, and damage and breakage of the battery cells entering the fork can be prevented.

[0031] In addition, by applying a variable structure to the fork that vertically supports the battery cells for stacking multiple battery cells, the stacking quality of the battery cells can be improved, and productivity and the operability of the process line can be enhanced. Brief explanation of the drawing

[0032] FIG. 1 is a diagram schematically illustrating a stacking process of battery cells through a stacking jig of battery cells according to the prior art. FIG. 2 is a schematic perspective view showing a battery cell seated on the fork of a stacking jig for a battery cell according to the prior art. FIG. 3 is a diagram schematically illustrating problems that may occur during the stacking process of battery cells using a stacking jig of battery cells according to the prior art. FIG. 4 is a front cross-sectional view schematically showing a variable fork of a battery cell stacking jig of a secondary battery according to one embodiment of the present invention. FIGS. 5 to 8 are schematic diagrams illustrating the operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention. FIG. 9 is a front cross-sectional view schematically showing a variable fork of a battery cell stacking jig of a secondary battery according to another embodiment of the present invention. FIGS. 10 to 14 are schematic diagrams illustrating the operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention. Specific details for implementing the invention

[0033] The present invention will be described in detail below. Prior to this, terms or words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor may appropriately define the concepts of terms to best describe their invention, they must be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0034] Terms such as "comprising" or "having," as used throughout the specification of the present invention, are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0035] Furthermore, when a part such as a layer, film, region, or plate is described as being "on" another part, this includes not only cases where it is "immediately above" the other part, but also cases where there is another part in between. Conversely, when a part such as a layer, film, region, or plate is described as being "under" another part, this includes not only cases where it is "immediately below" the other part, but also cases where there is another part in between. Additionally, in the specification of the present invention, being "placed on" may include cases where it is placed on the lower part as well as the upper part.

[0036] In the present invention, the horizontal direction may refer to the thickness direction of the battery cell, and in the present invention, the vertical direction may refer to the direction toward the gripper or the direction toward entering the fork.

[0037] (First embodiment)

[0038] FIG. 4 is a front cross-sectional view schematically showing a variable fork of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention. FIG. 5 to 8 are diagrams schematically showing the operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention.

[0039] As illustrated in the drawing, a battery cell stacking jig (1) according to one embodiment of the present invention supports both ends of a battery cell (3) so that a plurality of battery cells (3) are seated, and comprises a plurality of forks (10) arranged at a certain distance apart in the horizontal direction, a gripper (Gripper, 30) movably provided on the upper part of the forks (10) and arranged in the horizontal direction to load the battery cells (3) vertically toward the forks (10) so as to seat them within the forks (10), and a TRF (Transfer, 50) connected to the plurality of grippers (30) to move the gripper (30) to the upper part of the forks (10), and the forks (10) fix the battery cells (3) by pressing both sides in the thickness direction.

[0040] Here, the grippers (30) are arranged in multiple numbers to correspond to the spacing of the multiple forks (10) and are configured to be vertically loadable for installing the battery cells (3) within the forks (10). To this end, the grippers (30) may be configured with a vertically movable lifting rail structure.

[0041] In addition, the TRF (50) may be configured as a guide rail structure capable of moving in a horizontal direction to move a plurality of grippers (30) to the upper part of the fork (10). Here, since the structure for moving in the horizontal and vertical directions is a general structure, a detailed description thereof will be omitted below.

[0042] The forks (10) are arranged in pairs spaced apart at regular intervals along the longitudinal direction of the battery cell (3) to support both ends of the battery cell (3). Here, one fork (10) is positioned offset to avoid mutual interference with the other fork (10).

[0043] And, a plurality of forks (10) are made movable in the horizontal direction to stack a plurality of battery cells (3).

[0044] Specifically, the fork (10) may include a seating portion (11) on which the lower surface of a battery cell (3) is seated, vertical portions (12a, 12b) that extend vertically toward a gripper (30) from both ends of the seating portion (11), and a pressing means (13) provided on the opposing inner side of each vertical portion (12a, 12b).

[0045] Here, a battery cell (3) enters through the open entrance (12c) between each of the vertical sections (12a, 12b), the lower surface of the entered battery cell (3) is placed on the upper surface of the seating section (11), and both sides of the battery cell (3) in the thickness direction come into contact with the pressurizing means (13).

[0046] The above-mentioned pressurizing means (13) may include a pressurizing plate (13a, 13b) installed facing each other on the inner side of each vertical part (12a, 12b), and at least one elastic means (14) connecting the pressurizing plate (13a, 13b) and the vertical part (12a, 12b) so that each pressurizing plate (13a, 13b) moves elastically in the thickness direction of the battery cell (3) entering the fork (10).

[0047] In one embodiment of the present invention, the elastic means (14) is made of a spring, but is not limited thereto and can be modified in various ways.

[0048] According to the structure described above, the lower sides of the battery cell (3) entering through the open entrance (12c) between each vertical section (12a, 12b) come into contact with the upper portions of the pressure plates (13a, 13b) installed on the inner side of each vertical section (12a, 12b), and as the battery cell (3) continues to enter, each pressure plate (13a, 13b) moves in a direction closer to each vertical section (12a, 12b) by the thickness of the battery cell (3), and at this time, the elastic means (14) moves while maintaining a state of pressing both sides of the battery cell (3).

[0049] In this way, each of the above pressure plates (13a, 13b) comes into contact with both sides in the thickness direction of the battery cell (3) by the elasticity of the elastic means (14), thereby pressing and fixing both sides of the battery cell (3).

[0050] Meanwhile, when a plurality of battery cells (3) are stacked and then separated from the fork (10), the plurality of stacked battery cells (3) move to the outside of the fork (10) through the open opening (12c) between each vertical part (12a, 12b), and at this time, each pressure plate (13a, 13b) that presses both sides in the thickness direction of the battery cells (3) moves in a direction that moves closer to each other by the elasticity of the elastic means (14) and returns to the initial position.

[0051] Here, the upper and lower corners of each pressure plate (13a, 13b) that contacts the lower part of the battery cell (3) may be rounded to have a certain curvature. That is, in order to minimize damage and breakage of the battery cell (3) that comes into contact with the upper and lower parts of the pressure plates (13a, 13b) when the battery cell (3) enters and exits with the fork (10), the upper and lower corners of each pressure plate (13a, 13b) that contacts the lower part of the battery cell (3) may be rounded to have a curvature.

[0052] As described above, by rounding the upper and lower corners of each pressure plate (13a, 13b), damage to the battery cell (3) that comes into contact with the upper and lower corners of the pressure plates (13a, 13b) can be prevented.

[0053] Here, the curvature of the upper and lower corners of each of the above pressure plates (13a, 13b) can be varied, and the shape can also be varied.

[0054] In one embodiment of the present invention, the upper and lower edges of each pressure plate (13a, 13b) are rounded to have a certain curvature, but the mutually opposing inner upper edges of each vertical part (12a, 12b) may also be rounded to have a certain curvature, but are not limited thereto.

[0055] Meanwhile, a position sensing sensor (70) may be provided at a mutually corresponding position between the lower part of the gripper (30) and the upper part of the fork (10) to control the position of the gripper (30) in correspondence with the position of the fork (10).

[0056] To this end, the battery cell stacking jig (1) according to the present invention may further include a control unit (not shown).

[0057] With the structure described above, the TRF (50) moves to position a plurality of grippers (30) on the upper part of the fork (10), and when the position detection sensor (70) of the gripper (30) detects the position of the fork (10) and transmits the detected signal to the control unit, the control unit can install a battery cell (3) at the correct position of the fork (10) while the movement of the TRF (50) is stopped.

[0058] Hereinafter, the operation process of a battery cell stacking jig according to one embodiment of the present invention will be briefly explained with reference to FIGS. 5 to 8.

[0059] First, multiple battery cells (3) are gripped by multiple grippers (30), and then the grippers (30) are moved to the upper part of the fork (10) via TRF (50).

[0060] At this time, the gripper (30), which has moved to the upper part of the fork (10) by the movement of the TRF (50), is positioned at the correct location on the upper part of the fork (10) through the position detection sensor (70).

[0061] In this way, the gripper (30) located at the top of the fork (10) moves downward toward the fork (10) while gripping the battery cell (3), and the lower part of the battery cell (3) enters the open entrance (12c) between each vertical part (12a, 12b) of the fork (10).

[0062] Here, the lower part of the battery cell (3) entering through the open entrance (12c) between each vertical section (12a, 12b) comes into contact with the upper part of the pressure plate (13a, 13b) installed on the inner side of each vertical section (12a, 12b), and then enters between each pressure plate (13a, 13b), and each pressure plate (13a, 13b) moves in a direction away from each other toward each vertical section (12a, 12b) corresponding to the thickness of the battery cell (3).

[0063] At this time, the upper and lower corners of each pressure plate (13a, 13b) are rounded, so that the lower part of the battery cell (3) enters between each vertical part (12a, 12b) through the rounded part of each pressure plate (13a, 13b).

[0064] In this way, the lower part of the battery cell (3) that has entered between each vertical part (12a, 12b) comes into contact with the seating part (11), and each pressure plate (13a, 13b) prevents the battery cell (3) from moving while maintaining a state of pressure on both sides of the battery cell (3).

[0065] As described above, after installing the battery cells (3) within each fork (10), each fork (10) moves horizontally, and each battery cell (3) is stacked by being bonded to one another through adhesive surfaces (not shown) formed on both sides.

[0066] Next, the stacked battery cells (3) are separated from the fork (10) via another gripper (not shown) and TRF (not shown) and then transferred to a subsequent process. That is, the stacked multiple battery cells (3) are grasped by another gripper that moves to the top of the fork (3) to move the stacked battery cells (3), and the grasped battery cells (3) are moved up and down through the open inlet (12c) between each vertical section (12a, 12b) and then moved horizontally via another TRF and transferred to a subsequent process.

[0067] At this time, each pressure plate (13a, 13b) that presses both sides in the thickness direction of the battery cell (3) moves in a direction that moves closer to each other due to the elasticity of the elastic means (14) and returns to the initial position.

[0068] (Second embodiment)

[0069] FIG. 9 is a front cross-sectional view schematically showing a variable fork of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention. FIG. 10 to 14 are drawings schematically showing the operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention.

[0070] As illustrated in the drawing, a battery cell stacking jig (1) according to another embodiment of the present invention can install a battery cell (3) inside the fork (10') after partially modifying the structure of the fork (10') on which the battery cell (3) is installed so as to correspond to various battery cells (3) having different thicknesses.

[0071] Specifically, the fork (10') may include a seating portion (11) on which the lower surface of a battery cell (3) is seated, a vertical portion (12a) that extends vertically toward a gripper (30) at one end of the seating portion (11), and a moving pressure means (15) provided at the other end of the seating portion (11).

[0072] Here, the moving pressure means (15) may include a moving part (16) that is vertically formed and configured to be movable in a horizontal direction relative to the seating part (11), a pressure plate (17a) installed inside the moving part (16), and at least one elastic means (18) connecting the pressure plate (17a) and the moving part (16) so that the pressure plate (17a) moves elastically in the thickness direction of the battery cell (3) entering the fork (10').

[0073] To this end, a coupling groove (11a) is formed at the other end of the seating portion (11), and a movable piece (16a) corresponding to the coupling groove (11a) is formed protrudingly at the inner lower part of the movable portion (16).

[0074] With the structure described above, when the moving piece (16a) is coupled to the coupling groove (11a), the moving part (16) moves horizontally relative to the seating part (11) and moves to have an opening (12c) larger than the thickness of the battery cell (3).

[0075] That is, when the thickness of the battery cell (3) is greater than the preset thickness, the moving part (16) moves horizontally in a direction away from the vertical part (12a), and when the thickness of the battery cell (3) is smaller than the preset thickness, the moving part (16) moves horizontally in a direction closer to the vertical part (12a), but moves to have an opening (12c) that is larger than the thickness of the battery cell (3).

[0076] At this time, the moving part (16) may be installed so as to be movable in a horizontal direction on the mounting part (11) by means of an air cylinder (not shown) or a motor (not shown). Here, since the structure in which the moving part (16) moves in a horizontal direction by means of an air cylinder or a motor is a general structure, a detailed description thereof will be omitted below.

[0077] Meanwhile, in this embodiment as well, the upper and lower corners of the pressure plate (17a) in contact with the lower part of the battery cell (3) may be rounded to have a predetermined curvature.

[0078] In addition, the upper edge of the vertical portion (12a) of the fork (10') facing the moving pressure means (15) can also be rounded to have a predetermined curvature.

[0079] Hereinafter, the operation process of a battery cell stacking jig according to another embodiment of the present invention will be briefly explained with reference to FIGS. 10 to 14.

[0080] First, an air cylinder or motor is driven to move the moving part (16) horizontally so as to correspond to the thickness of the battery cell (3). At this time, the moving part (16) is moved so as to have an inlet (12c) that is larger than the thickness of the battery cell (3).

[0081] Then, after gripping multiple battery cells (3) with multiple grippers (30), they are moved to the upper part of the fork (10') via TRF (50).

[0082] Meanwhile, the gripper (30), which has moved to the upper part of the fork (10') by the movement of the TRF (50), is positioned at the correct location on the upper part of the fork (10') through the position detection sensor (70).

[0083] In this way, the gripper (30) located at the top of the fork (10') moves downward toward the fork (10') while gripping the battery cell (3), and the lower part of the battery cell (3) enters the open entrance (12c) between the vertical part (12a) and the moving part (16) of the fork (10').

[0084] Here, the lower part of the battery cell (3) entering through the open entrance (12c) between the vertical part (12a) and the moving part (16) comes into contact with the upper part of the pressure plate (17a) installed on the inside of the vertical part (12a), then enters between the vertical part (12a) and the pressure plate (17a), and the pressure plate (17a) moves toward the moving part (16) so as to correspond to the thickness of the battery cell (3).

[0085] At this time, the upper and lower corners of the pressure plate (17a) are rounded, so that the lower part of the battery cell (3) enters between the vertical part (12a) and the pressure plate (17a) through the rounded part of the pressure plate (17a).

[0086] In this way, the lower part of the battery cell (3) that has entered between the vertical part (12a) and the pressure plate (17a) comes into contact with the seating part (11), and the pressure plate (17a) prevents the battery cell (3) from moving while maintaining a state of pressing one side of the battery cell (3).

[0087] In this embodiment, the battery cell (3) is installed by moving the moving part (16) in a horizontal direction to correspond to the thickness of the battery cell (3) and then mounting the battery cell (3) onto the fork (10') using a plurality of grippers (30). However, it is also possible to move the moving part (16) in a horizontal direction to position it corresponding to the thickness of the battery cell (3) after the battery cell (3) has entered the fork (10') using a plurality of grippers (30) and mounted, and then fix the battery cell (3) by pressing it through a pressure plate (17a) provided on the moving part (16), and various other modifications are possible.

[0088] Although the present invention is illustrated and described above in relation to specific embodiments, it will be readily apparent to those skilled in the art that various modifications and changes are possible without departing from the spirit and scope of the invention as set forth in the appended claims. Explanation of the symbols

[0089] 1 : Battery Cell Stacking Jig 3 : Battery cell 10, 10' : Fork 11 : Seating part 11a : Connecting groove 12a, 12b: Vertical section 12c : Entrance 13: Pressurizing means 13a : Pressure plate 14: Elastic means 15: Mobile pressurizing means 16 : Moving part 16a : Movement 17a : Pressure plate 18: Elastic means 30 : Gripper 50 : TRF 70: Position detection sensor

Claims

Claim 1 A battery cell stacking jig for a secondary battery for stacking multiple battery cells, comprising: multiple forks arranged at a certain distance apart in the horizontal direction to support both ends of the battery cells so that multiple battery cells are seated; and multiple grippers arranged in the horizontal direction to load the battery cells vertically toward the forks so that the battery cells are seated within the forks. A battery cell stacking jig comprising: a plurality of grippers connected to move the grippers to the upper part of the fork; wherein the fork presses and fixes both sides in the thickness direction of the battery cell; wherein the fork comprises a seating portion on which the lower surface of the battery cell is seated, a vertical portion extending vertically from both ends of the seating portion, and a pressing means provided on each opposing inner side of the vertical portion; wherein the pressing means comprises a pressing plate installed facing each other on the inner side of each vertical portion, and at least one elastic means connecting the pressing plate and the vertical portion so that each pressing plate elastically moves and presses against both sides of the battery cell entering the fork; and wherein the upper and lower edges of the pressing plate in contact with the lower part of the battery cell are rounded to have a curvature. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A battery cell stacking jig for a secondary battery for stacking multiple battery cells, comprising: multiple forks arranged at a certain distance apart in the horizontal direction to support both ends of the battery cells so that multiple battery cells are seated; a plurality of grippers arranged in the horizontal direction to load the battery cells vertically toward the forks so as to seat them within the forks, and a transfer (TRF) connected to the plurality of grippers to move the grippers to the upper part of the forks; wherein the forks press and fix both sides in the thickness direction of the battery cells, and the forks include a seating portion on which the lower surface of the battery cells is seated, a vertical portion extending vertically from one end of the seating portion, and a moving pressing means provided at the other end of the seating portion. Claim 6 A battery cell stacking jig according to claim 5, wherein the moving pressure means comprises a moving part formed vertically and movable in a horizontal direction relative to a seating part, a pressure plate installed on the inner side of the moving part, and at least one elastic means connecting the pressure plate and the moving part so as to elastically move and apply pressure to one side of a battery cell into which the pressure plate enters the fork. Claim 7 A battery cell stacking jig according to claim 6, wherein a coupling groove is formed at the other end of the seating portion, a movable piece corresponding to the coupling groove is formed protrudingly on the inner lower portion of the movable portion, and the movable portion moves horizontally relative to the seating portion while the movable piece is coupled to the coupling groove. Claim 8 A battery cell stacking jig according to claim 7, wherein the moving part is movable relative to the seating part by means of an air cylinder or a motor. Claim 9 A battery cell stacking jig according to claim 6, characterized in that the upper and lower corners of the pressure plate in contact with the lower part of the battery cell are rounded to have a curvature. Claim 10 A battery cell stacking jig according to claim 1 or 5, characterized in that a position sensing sensor is respectively provided at the lower part of the gripper and the upper part of the fork.

Images