Secondary Battery Cell Stacking Jig

Abstract

The disclosed invention relates to a battery cell stacking jig for a secondary battery for stacking a plurality of battery cells, the jig including: a plurality of forks arranged at regular intervals in a horizontal direction and supporting both ends of the battery cell so that the plurality of battery cells can be seated; a plurality of grippers arranged in a horizontal direction and movably provided on the top of the forks, the grippers vertically loading the battery cells toward the forks so as to seat them in the forks; and a transfer mechanism (TRF) connected to the plurality of grippers and moving the grippers to the top of the forks, and the forks may apply pressure to both sides of the battery cell in a thickness direction to fix it.

Description

[Technical field]

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

[0002] More particularly, the present invention relates to a battery cell stacking jig that can prevent the battery cells from moving by applying a variable structure to forks that vertically support the battery cells in order to stack a plurality of battery cells.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0166971 dated December 2, 2022, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference. [Background technology]

[0004] In recent years, the key trends in the development of the electronics industry can be summarized as the wireless and mobile trend of devices, and the conversion of analog to digital. The rapid popularity of wireless telephones (also known as mobile phones) and laptops, and the conversion of analog cameras to digital cameras are some representative examples.

[0005] In line with this trend, research and development into secondary batteries is being actively conducted, and the types of applications using secondary batteries are becoming increasingly diverse due to the advantages of secondary batteries. In the future, secondary batteries are expected to be applied to more fields and products than ever before.

[0006] Here, secondary batteries are attracting attention not only for portable devices such as mobile phones, notebook computers, and camcorders, but also as energy sources for electric vehicles and hybrid electric vehicles, which have been presented as a solution to solve air pollution caused by existing gasoline-powered and diesel-powered vehicles that use fossil fuels.

[0007] 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 housed in a cylindrical or prismatic metal can, and pouch-type battery cells in which the electrode assembly is housed in a pouch-type case made of an aluminum laminate sheet.

[0008] The electrode assembly built into the battery case is a power generating element capable of charging and discharging, which is composed of a positive electrode plate, a negative electrode plate, and a separator interposed between the positive and negative electrode plates. The electrode assembly is classified into a jelly roll type in which a separator is interposed between long sheet-like positive and negative electrode plates coated with active materials and then wound up, and a stack type in which a number of positive and negative electrode plates formed to a predetermined size are stacked in sequence with a separator interposed between them.

[0009] Such secondary batteries are classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, etc. depending on the composition of the electrodes and electrolyte. Generally, 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.

[0010] Meanwhile, a secondary battery is used in the form of a module in which at least one battery cell is stacked.

[0011] For this, as shown in FIG. 1, the battery cell stacking jig 100 includes a plurality of forks 103 arranged at regular intervals in the thickness direction of the battery cells 101 so that the plurality of battery cells 101 are respectively seated thereon, a gripper (Gripper, 105) that vertically loads the battery cells 101 toward the forks 103 so that the battery cells 101 are seated and installed within the forks 103, and a TRF (Transfer, 107) that is connected to the plurality of grippers 105 and moves the gripper 105 to an upper portion of the forks 103.

[0012] The multiple forks 103 are arranged to be movable horizontally, which is the thickness direction of the battery cells 101, and after the battery cells 101 are seated inside the forks 103 through the entrances of each fork 103, the forks 103 move horizontally to stack the multiple battery cells 101.

[0013] Here, an adhesive surface (not shown) for stacking is formed on the side of each battery cell 101, and the adhesive surfaces of the battery cells 101 are adhered to each other and stacked by the movement of each fork 103, and the stacked battery cells 101 are transported to a subsequent process again via another gripper (not shown).

[0014] Meanwhile, as shown in FIG. 2, the forks 103 are arranged in pairs at a regular interval in the longitudinal direction of the battery cell 101 to support both ends of the battery cell 101, and each fork 103a, 103b is offset from the other opposing fork 103'a, 103'b to avoid mutual interference therewith, and in this arrangement, the multiple forks 103, 103' are arranged at regular intervals.

[0015] The above-mentioned secondary battery battery cell stacking jig has a problem that, as shown in FIG. 3(a), when each battery cell 101 is placed on a plurality of forks 103, a difference may occur 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 hit the opening of the forks 103 and be damaged.

[0016] In order to solve the above problems, the width of the forks on which the battery cells are mounted is made larger than the thickness of the battery cells, taking into account the tolerances of the battery cells, thereby stably mounting and installing the battery cells within the forks.

[0017] However, as shown in FIG. 3(b), by forming the width of the fork 103 larger than the thickness of the battery cell 101, there is a problem that the battery cell 101 seated on the fork 103 moves within the fork 103, which causes distortion in the alignment of the stacked battery cells, resulting in a problem of degraded product quality. [Prior art documents] [Patent documents]

[0018] [Patent Document 1] Korean Patent No. 10-1486232 Summary of the Invention [Problem to be solved by the invention]

[0019] The present invention has been made to solve the above problems, and aims to provide a battery cell stacking jig that can prevent the battery cells from moving and being damaged when the battery cells are seated by improving the structure of forks that vertically support the battery cells in order to stack the battery cells.

[0020] And, the present invention aims to provide a battery cell stacking jig that can improve stacking quality of the battery cells by applying an adjustable structure to forks that vertically support the battery cells in order to stack a plurality of battery cells, thereby improving productivity and operability of the process line. [Means for solving the problem]

[0021] In order to achieve the above object, the present invention provides a battery cell stacking jig for a secondary battery for stacking a plurality of battery cells, the jig including: forks that support both ends of a battery cell so that the plurality of battery cells are seated, and that are arranged in a plurality of positions spaced apart in a horizontal direction; grippers that are movably provided on top of the forks, that are arranged in a plurality of positions in the horizontal direction, and that vertically load the battery cells toward the forks so that the battery cells are seated in the forks; and a TRF (Transfer) that is connected to the plurality of grippers and moves the grippers to the top of the forks, and the forks apply pressure to both sides of the battery cell in a thickness direction to fix it.

[0022] In one embodiment, the fork may include a seating portion on which a lower surface of the battery cell is seated, vertical portions extending vertically from both ends of the seating portion, and pressure means provided on opposing inner sides of the vertical portions.

[0023] As a specific embodiment, the pressure means may include pressure plates installed opposite each other inside each vertical portion, and at least one elastic means connecting the pressure plates to the vertical portions so that each pressure plate elastically moves against both side surfaces of the battery cell entering the fork to apply pressure.

[0024] In another specific embodiment, the upper and lower edges of the pressure plate that contact the lower portion of the battery cell may be rounded to have a curvature.

[0025] In another embodiment, the fork may include a mounting portion on which a lower surface of the battery cell is mounted, a vertical portion extending vertically from one end of the mounting portion, and a moving pressure means provided at the other end of the mounting portion.

[0026] As a specific embodiment, the moving pressure means may include a moving part that is formed vertically and is movable horizontally relative to the seating part, a pressure plate installed inside the moving part, and at least one elastic means that connects the pressure plate and the moving part such that the pressure plate elastically moves and presses against one side of the battery cell that enters the fork.

[0027] In another specific embodiment, a coupling groove is formed at the other end of the mounting part, and a moving piece corresponding to the coupling groove is protruded from the inner lower part of the moving part, and with the moving piece coupled to the coupling groove, the moving part can move horizontally relative to the mounting part.

[0028] As another specific embodiment, the moving part can be movable relative to the mounting part by an air cylinder or a motor.

[0029] In another specific embodiment, the upper and lower edges of the pressure plate that contact the lower portion of the battery cell may be rounded to have a curvature.

[0030] As another embodiment, position sensing sensors may be provided on the lower part of the gripper and the upper part of the forks, respectively. Effect of the Invention

[0031] According to the present invention, the structure of the forks that vertically support the battery cells in order to stack a plurality of battery cells can be improved to prevent the battery cells from moving and to prevent damage and breakage of the battery cells that enter the forks.

[0032] In addition, by applying a variable structure to the forks that vertically support the battery cells in order to stack a plurality of battery cells, the stacking quality of the battery cells can be improved, and the productivity and operability of the process line can be improved. [Brief description of the drawings]

[0033] [Figure 1]1 is a diagram illustrating a battery cell stacking process using a battery cell stacking jig according to the prior art; [Diagram 2] 1 is a perspective view showing a battery cell being mounted on a fork of a battery cell stacking jig according to the related art; FIG. [Diagram 3] 1 is a diagram illustrating a schematic diagram of a problem that may occur during a battery cell stacking process using a battery cell stacking jig according to the related art; [Figure 4] 1 is a front cross-sectional view illustrating a schematic configuration of an adjustable fork of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention. FIG. [Diagram 5] 4 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention; [Figure 6] 4 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention; [Figure 7] 4 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention; [Figure 8] 4 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention; [Figure 9] FIG. 11 is a front cross-sectional view illustrating a schematic configuration of an adjustable fork of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention. [Figure 10] 11 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention; [Figure 11] 11 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention; [Figure 12] 11 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention; [Figure 13]11 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention; [Figure 14] 11 is a diagram illustrating an operation process of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] The present invention will be described in detail below. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention based on the principle that an inventor can appropriately define the concept of a term to best describe his own invention.

[0035] As used throughout the present specification, terms such as "comprise" and "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but may be understood as not precluding the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0036] In addition, when a layer, film, region, plate, or other part is described as being "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part in between. Conversely, when a layer, film, region, plate, or other part is described as being "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. In addition, in the specification of the present invention, being "on" can include not only the case where it is located at the top, but also the case where it is located at the bottom.

[0037] "Horizontal" as referred to in this invention may mean the thickness direction of the battery cell, and "vertically" as referred to in this invention may mean the direction toward the gripper or the direction entering the forks.

[0038] (First embodiment) Fig. 4 is a front cross-sectional view illustrating an adjustable fork of a battery cell stacking jig for a secondary battery according to an embodiment of the present invention. Figs. 5 to 8 are views illustrating an operation process of the battery cell stacking jig for a secondary battery according to an embodiment of the present invention.

[0039] As shown in the drawings, a battery cell stacking jig 1 according to an embodiment of the present invention includes a plurality of forks 10 arranged at regular intervals in a horizontal direction, supporting both ends of a battery cell 3 so that a plurality of battery cells 3 are seated therein, a plurality of grippers (Gripper, 30) movably provided on top of the forks 10, arranged in a horizontal direction, and vertically loading the battery cells 3 toward the forks 10 so as to seat them in the forks 10, and a TRF (Transfer, 50) connected to the plurality of grippers 30 and moving the grippers 30 to the top of the forks 10, and the forks 10 pressurize both sides of the battery cells 3 in a thickness direction to fix them.

[0040] Here, a plurality of grippers 30 are arranged to correspond to the intervals between the plurality of forks 10, and are capable of loading the battery cells 3 vertically in order to install them into the forks 10. To this end, the gripper 30 may be formed of a lifting rail structure capable of moving vertically.

[0041] In addition, the TRF 50 may be configured with a guide rail structure that is horizontally movable in order to move the plurality of grippers 30 to the upper portion of the fork 10. Here, since the structure that moves in the horizontal and vertical directions is a general structure, detailed description thereof will be omitted below.

[0042] The forks 10 are arranged in pairs at a certain interval in the longitudinal direction of the battery cell 3 to support both ends of the battery cell 3. Here, each fork 10 is arranged offset from the other fork 10 to avoid mutual interference with the other fork 10.

[0043] The multiple forks 10 are movable in the horizontal direction for stacking the multiple battery cells 3 .

[0044] Specifically, the fork 10 may include a mounting portion 11 on which the lower surface of the battery cell 3 is mounted, vertical portions 12a and 12b formed at both ends of the mounting portion 11 and extending vertically toward the gripper 30, and pressure means 13 provided on the opposing inner sides of the vertical portions 12a and 12b.

[0045] Here, the battery cell 3 enters through the open entrance 12c between the vertical parts 12a and 12b, and the lower surface of the entered battery cell 3 is seated on the upper surface of the seating part 11, and both sides in the thickness direction of the battery cell 3 come into contact with the pressing means 13.

[0046] The pressure means 13 may include pressure plates 13a, 13b installed facing each other inside each vertical portion 12a, 12b, and at least one elastic means 14 connecting the pressure plates 13a, 13b to the vertical portions 12a, 12b so that each pressure 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 a spring, but is not limited thereto and may be modified in various ways.

[0048] With the above-described structure, the lower portions on both sides of the battery cell 3 entering the open entrance 12c between the vertical portions 12a, 12b abut against the upper portions of the pressure plates 13a, 13b installed on the inside of each vertical portion 12a, 12b, and when the battery cell 3 continues to enter, each pressure plate 13a, 13b moves in a direction approaching each vertical portion 12a, 12b by an amount equivalent to the thickness of the battery cell 3, and at this time, the elastic means 14 moves while maintaining a state in which both sides of the battery cell 3 are pressed.

[0049] In this manner, the pressure plates 13a, 13b contact both sides of the battery cell 3 in the thickness direction due to the elasticity of the elastic means 14, and press and fix both sides of the battery cell 3.

[0050] Meanwhile, after the plurality of battery cells 3 are stacked, when the stacked plurality of battery cells 3 are separated from the fork 10, the stacked plurality of battery cells 3 move to the outside of the fork 10 through the open entrance 12c between the vertical portions 12a, 12b, and at this time, the pressure plates 13a, 13b that pressurize both sides of the battery cell 3 in the thickness direction move toward each other due to the elasticity of the elastic means 14 and return to their initial positions.

[0051] Here, the upper and lower edges of the pressure plates 13a, 13b in contact with 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 in contact with the upper and lower parts of the pressure plates 13a, 13b when the battery cell 3 is advanced and retreated by the fork 10, the upper and lower edges of the pressure plates 13a, 13b in contact with 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 edges of each of the pressure plates 13a and 13b, damage to the battery cells 3 in contact with the upper and lower edges of the pressure plates 13a and 13b can be prevented.

[0053] Here, the curvature of the upper and lower edges of each of the pressure plates 13a and 13b can be varied in various ways, and the shape can also be varied in various ways.

[0054] In one embodiment of the present invention, the upper and lower edges of each of the pressure plates 13a, 13b are rounded to have a constant curvature, but the inner upper edges facing each other of each of the vertical parts 12a, 12b may also be rounded to have a constant curvature, but are not limited thereto.

[0055] Meanwhile, position sensors 70 are provided at corresponding positions on the lower part of the gripper 30 and the upper part of the fork 10 to control the position of the gripper 30 in accordance with the position of the fork 10.

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

[0057] With the above-described structure, when the TRF 50 moves to position the plurality of grippers 30 on the upper part of the forks 10, and the position detection sensor 70 of the gripper 30 detects the position of the forks 10 and transmits the detected signal to the control unit, the control unit can seat and install the battery cell 3 at an accurate position on the forks 10 while stopping the movement of the TRF 50.

[0058] Hereinafter, an operation process of the battery cell stacking jig according to an embodiment of the present invention will be briefly described with reference to FIGS.

[0059] First, a plurality of battery cells 3 are gripped by a plurality of grippers 30, and then the grippers 30 are moved to the upper part of the forks 10 via the TRF 50.

[0060] At this time, the gripper 30, which has been moved to the upper part of the forks 10 by the movement of the TRF 50, is positioned at a precise position on the upper part of the forks 10 via the position detection sensor 70.

[0061] In this manner, the gripper 30 positioned at the top of the forks 10 moves downward toward the forks 10 while gripping the battery cell 3, and the lower part of the battery cell 3 enters the open entrance 12c between the vertical portions 12a, 12b of the forks 10.

[0062] Here, the lower part of the battery cell 3 entering the open entrance 12c between each vertical part 12a, 12b comes into contact with the upper part of the pressure plate 13a, 13b installed on the inside of each vertical part 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 part 12a, 12b in accordance with the thickness of the battery cell 3.

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

[0064] In this manner, the lower portion of the battery cell 3 inserted between the vertical portions 12a, 12b contacts the seating portion 11, and the pressure plates 13a, 13b maintain a state in which both sides of the battery cell 3 are pressed, thereby preventing the battery cell 3 from moving.

[0065] After the battery cells 3 are seated and installed in each fork 10 as described above, each fork 10 moves horizontally, and each battery cell 3 is laminated and stacked while being adhered to each other through adhesive surfaces (not shown) formed on both sides.

[0066] Next, the stacked battery cells 3 are separated on the forks 10 via another gripper (not shown) and a TRF (not shown) and then transferred to a subsequent process. That is, the stacked battery cells 3 are gripped via another gripper that moves to the upper part of the forks 10 to move the stacked battery cells 3, and the gripped battery cells 3 are moved up and down via an open entrance 12c between the vertical parts 12a, 12b, and then moved horizontally via another TRF and transferred to a subsequent process.

[0067] At this time, the pressure plates 13a and 13b that press both sides of the battery cell 3 in the thickness direction move toward each other due to the elasticity of the elastic means 14 and return to their initial positions.

[0068] Second embodiment Fig. 9 is a front cross-sectional view illustrating an adjustable fork of a battery cell stacking jig for a secondary battery according to another embodiment of the present invention. Figs. 10 to 14 are views illustrating an operation process of the battery cell stacking jig for a secondary battery according to another embodiment of the present invention.

[0069] As shown in the drawings, a battery cell stacking jig 1 according to another embodiment of the present invention may partially modify the structure of the forks 10' on which the battery cells 3 are seated and installed, and adjust the size of the inlets 12c of the forks 10' to accommodate various battery cells 3 having different thicknesses, and then seat and install the battery cells 3 within the forks 10'.

[0070] Specifically, the fork 10' may include a mounting portion 11 on which the lower surface of the battery cell 3 is mounted, a vertical portion 12a formed at one end of the mounting portion 11 and extending vertically toward the gripper 30, and a moving pressure means 15 provided at the other end of the mounting portion 11.

[0071] Here, the moving pressure means 15 may include a moving part 16 formed vertically and movable horizontally 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 such that the pressure plate 17a moves elastically in the thickness direction of the battery cell 3 entering the fork 10′.

[0072] For this purpose, a coupling groove 11a is formed at the other end of the seating part 11, and a moving piece 16a corresponding to the coupling groove 11a is protruded from the inner lower part of the moving part 16.

[0073] With the above-described structure, 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 inlet 12c larger than the thickness of the battery cell 3.

[0074] 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 less than the preset thickness, the moving part 16 moves horizontally in a direction approaching the vertical part 12a and moves so as to have an entrance 12c that is greater than the thickness of the battery cell 3.

[0075] At this time, the moving part 16 may be installed on the seating part 11 so as to be movable in a horizontal direction by an air cylinder (not shown) or a motor (not shown). Here, the structure in which the moving part 16 moves in a horizontal direction by an air cylinder or a motor is a general structure, and therefore a detailed description thereof will be omitted below.

[0076] Meanwhile, in the present embodiment, the upper and lower edges of the pressure plate 17a in contact with the lower portion of the battery cell 3 may be rounded to have a predetermined curvature.

[0077] Also, the upper edge of the vertical portion 12a of the fork 10' facing the moving and pressing means 15 can be rounded to have a predetermined curvature.

[0078] Hereinafter, an operation process of a battery cell stacking jig according to another embodiment of the present invention will be briefly described with reference to FIGS.

[0079] First, the air cylinder or the motor is driven to move the moving part 16 in the horizontal direction 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 larger than the thickness of the battery cell 3.

[0080] Then, after the multiple grippers 30 grip the multiple battery cells 3, they are moved to the upper part of the fork 10' via the TRF 50.

[0081] Meanwhile, the gripper 30, which has been moved to the upper part of the forks 10' by the movement of the TRF 50, is positioned at a precise position on the upper part of the forks 10' via the position detection sensor 70.

[0082] In this manner, the gripper 30 positioned 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'.

[0083] Here, the lower part of the battery cell 3 entering the open entrance 12c between the vertical part 12a and the moving part 16 abuts against the upper part of the pressure plate 17a installed inside the vertical part 12a, and 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.

[0084] At this time, since the upper and lower edges of the pressure plate 17a are rounded, 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.

[0085] In this manner, the lower portion of the battery cell 3 inserted between the vertical portion 12a and the pressure plate 17a contacts the seating portion 11, and the pressure plate 17a keeps one side of the battery cell 3 pressed, thereby preventing the battery cell 3 from moving.

[0086] In this embodiment, the moving part 16 is moved horizontally to correspond to the thickness of the battery cell 3, and then the battery cell 3 is seated and installed on the forks 10' by the multiple grippers 30. However, it is also possible to move the moving part 16 horizontally to position it to correspond to the thickness of the battery cell 3 after the multiple grippers 30 have entered the forks 10' and seated and installed it, and to pressurize and fix the battery cell 3 using the pressure plate 17a provided on the moving part 16, and various other modifications and implementations are possible.

[0087] While the present invention has been illustrated and described with reference to specific embodiments, it will be readily apparent to anyone skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention as set forth in the appended claims. [Explanation of symbols]

[0088] 1: Battery cell stacking jig 3: Battery cell 10, 10': Fork 11: Landing section 11a: Binding groove 12a, 12b: Vertical part 12c: Entrance 13: Pressurizing means 13a: Pressure plate 14: Elastic means 15: Moving pressure means 16: Moving section 16a: Moving piece 17a: Pressure plate 18: Elastic means 30: Gripper 50:TRF 70: Position sensor

Claims

1. A secondary battery cell stacking jig for stacking a plurality of battery cells, a plurality of forks that are arranged at regular intervals in a horizontal direction and support both ends of the battery cells so that the battery cells are seated; a gripper movably provided on an upper portion of the fork, the gripper being arranged in a plurality of positions in the horizontal direction and configured to vertically load the battery cell toward the fork so as to seat the battery cell within the fork; A TRF coupled to a plurality of the grippers and configured to move the grippers to the upper portion of the forks; Including, The fork is a battery cell stacking jig that presses and fixes both sides of the battery cell in the thickness direction.

2. The fork is a seating portion on which a lower surface of the battery cell is seated; a vertical portion extending vertically from both ends of the seating portion; A pressure means is provided on each of the opposing inner sides of the vertical portion; 2. The battery cell stacking jig of claim 1 , comprising:

3. The pressurizing means is Pressure plates are installed on the inner sides of the vertical portions facing each other; At least one elastic means connecting the pressure plate and the vertical portion such that each pressure plate can elastically move and press against both sides of the battery cell entering into the fork; 3. The battery cell stacking jig of claim 2, comprising:

4. The battery cell stacking jig according to claim 3 , wherein upper and lower edges of the pressure plate that contact the lower portions of the battery cells are rounded to have a curvature.

5. The fork is a seating portion on which a lower surface of the battery cell is seated; a vertical portion extending vertically from one end of the seat; A moving and pressing means provided at the other end of the seating portion; 2. The battery cell stacking jig of claim 1 , comprising:

6. The moving and pressing means is A moving part formed vertically and movable in a horizontal direction relative to the seating part; a pressure plate installed inside the moving part; and at least one elastic means connecting the pressure plate and the moving part so that the pressure plate elastically moves and presses against one side of the battery cell entering into the fork; 6. The battery cell stacking jig of claim 5, comprising:

7. A coupling groove is formed at the other end of the seating portion. A moving piece corresponding to the coupling groove is protruded from an inner lower portion of the moving part, The battery cell stacking jig according to claim 6 , wherein the moving part moves in a horizontal direction relative to the seating part while the moving piece is engaged with the engaging groove.

8. The moving unit is The battery cell stacking jig according to claim 7 , which is movable relative to the mounting portion by an air cylinder or a motor.

9. The battery cell stacking jig according to claim 6 , wherein upper and lower edges of the pressure plate that contact the lower portions of the battery cells are rounded to have a curvature.

10. The battery cell stacking jig according to any one of claims 1 to 9, wherein a lower part of the gripper and an upper part of the fork are respectively provided with position detection sensors.

Images