Bonding apparatus and bonding method

Abstract

A bonding apparatus is disclosed. The bonding apparatus is for coupling a plurality of cylindrical battery cells and a cooling tube in a cell group, and comprises a jig and a plurality of driving units. The jig accommodates the cell group. The plurality of driving units are disposed in a line in the longitudinal direction of the jig on one side plate and the other side plate of the jig, and cause the pressing members to move such that the pressing members disposed on the jig press the cylindrical battery cells.

Description

Bonding device and bonding method

[0001] The present invention relates to a bonding apparatus and a bonding method for bonding a plurality of cylindrical battery cells and a cooling tube.

[0002] Currently commercialized lithium (Li) secondary batteries primarily use lithium-based oxides and carbon materials as positive and negative active materials, respectively. Additionally, the lithium secondary battery comprises an electrode assembly including a positive plate and a negative plate coated with these positive and negative active materials, respectively, and a separator disposed between the positive and negative plates, as well as an outer casing that seals and encloses the electrode assembly together with an electrolyte.

[0003] Lithium secondary batteries can be classified according to the shape of the battery case into pouch-type secondary batteries, in which the electrode assembly is embedded in an aluminum laminate sheet pouch, and can-type secondary batteries, in which the electrode assembly is embedded in a metal can. Furthermore, can-type secondary batteries can be further classified into cylindrical batteries and prismatic batteries depending on the shape of the metal can.

[0004] These lithium secondary batteries are utilized as battery modules or battery packs in which multiple battery cells are assembled into a dense structure by overlapping or stacking them, either in themselves or in cartridges, to provide high voltage and high current, and then electrically connected.

[0005] For example, in a cylindrical battery, a cell group may be formed. The cell group comprises two cell arrays and a cooling tube disposed between the two cell arrays. Here, a cell array refers to a plurality of cylindrical battery cells arranged in a row.

[0006] To elaborate, a cell group represents a structure in which multiple cylindrical battery cells are arranged in a line along the length of a cooling tube on both sides of the cooling tube, with a cooling tube in between. The sides of the cooling tube represent one side and the other side of the cooling tube (see FIG. 6).

[0007] Multiple such single cell groups can be provided to form a battery module or battery pack.

[0008] In manufacturing a cell group, the spacing between multiple cylindrical battery cells needs to be as close as possible, and the spacing between multiple cylindrical battery cells and cooling tubes also needs to be as close as possible.

[0009] In addition, thermal management is required for each of the multiple cylindrical battery cells.

[0010] The objective of the present invention is to provide a bonding device and a bonding method in which the spacing between a plurality of cylindrical battery cells is minimized, the spacing between a plurality of cylindrical battery cells and a cooling tube is also minimized, and thermal management of each of the plurality of cylindrical battery cells is possible.

[0011] The aforementioned objective of the present invention is achieved by the specific details described below.

[0012] A bonding device according to an embodiment of the present invention is a bonding device for bonding a plurality of cylindrical battery cells and a cooling tube in a cell group, and includes a jig and a plurality of driving members. The jig accommodates the cell group. The plurality of driving members are arranged in a row along the longitudinal direction of the jig on one side plate and the other side plate of the jig, and move the pressing members arranged on the jig so that the pressing members press the cylindrical battery cells. The positive electrode of each of the plurality of cylindrical battery cells is placed in each of the plurality of electrode insertion parts formed on the bottom plate of the jig. And, each of the plurality of cylindrical battery cells arranged in a row on one side of the cooling tube is placed between adjacent cylindrical battery cells arranged in a row on the other side of the cooling tube. And, the plurality of cylindrical battery cells and the cooling tube are bonded by the adhesive by the pressing of the pressing members.

[0013] Specifically, the jig is provided with side plates positioned at the edges of both sides of a base plate. A plurality of bearing holes and a plurality of support holes are formed in the side plates. A bearing member is disposed in the bearing hole, and a guide support member is disposed in the support hole.

[0014] Specifically, each of the pressure members placed in the jig is spaced apart from each of the plurality of bearing holes by a preset distance. The pressure member can move toward the cylindrical battery cell or move away from the cylindrical battery cell.

[0015] Specifically, the pressure member can rotate at a constant angle in the left and right directions.

[0016] Specifically, a pressure member is connected to a pressure support member, and the pressure support member is connected to a screw assembly. The screw assembly comprises a screw member connected to the pressure support member and a nut member connected to the screw member. When the nut member rotates, the screw member moves linearly along the longitudinal direction of the screw member.

[0017] Specifically, the nut member is connected to the shaft member. The screw member is positioned in the through hole of the nut member and the center hole of the shaft member. One side of the shaft member is positioned in the through hole of the bearing member, and when the shaft member rotates, the nut member rotates.

[0018] Specifically, each of the plurality of drive members includes a first motor and a socket member connected to the rotation axis of the first motor. Each of the plurality of drive members is placed on a support, and when it moves on the support and approaches the shaft member, the socket member engages with the other side of the shaft member. When the first motor is driven while the socket member is engaged with the shaft member, the socket member and the shaft member rotate.

[0019] Specifically, when the socket member rotates in one rotational direction by the driving of the first motor, the shaft member and the nut member rotate in one rotational direction, and the screw member connected to the nut member and the pressure support member connected to the screw member move toward the cylindrical battery cell. Then, the pressure member connected to the pressure support member presses the outer surface of the cylindrical battery cell.

[0020] Specifically, a linear movement guide is disposed between each of the plurality of drive units and the support. Each of the plurality of drive units moves linearly by driving the piston of the cylinder device or the second motor of the motor device.

[0021] Specifically, the guide support member is connected to the guide member. One end of the guide member is connected to the pressure support member, and the other end of the guide member is connected to the guide support member.

[0022] Specifically, one or more position sensor units are disposed on the jig. The position sensor units measure the positions of multiple cylindrical battery cells disposed on the jig.

[0023] Specifically, position data of multiple cylindrical battery cells measured by the position sensor unit is transmitted to the control unit. The control unit analyzes the position data and drives a driving unit connected to a cylindrical battery cell that is not located at a preset point among the cylindrical battery cells, thereby causing the cylindrical battery cell to be located at the preset point.

[0024] Specifically, a pressure sensor is disposed on one side of the pressurizing member. The pressure sensor measures the pressure applied by the pressurizing member to the outer surface of the cylindrical battery cell.

[0025] Specifically, pressure data of multiple cylindrical battery cells measured by the pressure sensor unit is transmitted to the control unit. The control unit uses the pressure data to control the pressure applied by the pressurizing member to the multiple cylindrical battery cells. The control of the pressure is achieved by the control unit adjusting the torque of the first motor of the driving unit.

[0026] The bonding method according to an embodiment of the present invention proceeds in the order of a pressure preparation step, a first pressure step, a first position measurement step, a second pressure step, a second position measurement step, and a pressure completion step.

[0027] Specifically, the secondary pressurization step and the secondary position measurement step are repeated until a plurality of cylindrical battery cells and a cooling tube are placed at a preset position.

[0028] The bonding device and bonding method of the present invention can minimize the spacing between a plurality of cylindrical battery cells, minimize the spacing between a plurality of cylindrical battery cells and a cooling tube, and manage the heat of each of the plurality of cylindrical battery cells.

[0029] In addition, the bonding device and bonding method of the present invention improve fixing force by widening the bonding area between the cylindrical battery cell and the cooling tube, and improve the temperature management efficiency of the cylindrical battery cell by ensuring that the cooling tube is in close contact with the side of the cylindrical battery cell.

[0030] In addition, the bonding device and bonding method of the present invention improve the positional precision of cylindrical battery cells, thereby improving the assembly quality and yield of a battery module or battery pack.

[0031] In addition, the bonding device and bonding method of the present invention improve production yield by measuring the positions of cylindrical battery cells before and after bonding by providing a position sensor unit.

[0032] Figure 1 shows the jig of the present invention moved and placed in the driving unit.

[0033] Figure 2 shows that the cells are pressurized by the operation of the driving unit.

[0034] Figure 3 shows the state in which the driving unit is separated from the jig.

[0035] Figure 4 shows the jig of the present invention.

[0036] Figure 5 shows that a cooling tube is placed in the jig.

[0037] Figure 6 shows the arrangement relationship between the cell and the cooling tube.

[0038] Figure 7 shows a cooling tube.

[0039] FIG. 8 is a perspective view of the bottom plate and side plates of the jig disassembled.

[0040] FIG. 9 is a perspective view of a pressurizing member and a screw assembly, etc.

[0041] FIG. 10 is a plan view of the pressurizing member and screw assembly, etc., shown in FIG. 9.

[0042] FIG. 11 is an exploded perspective view of the pressurizing member and screw assembly, etc., shown in FIG. 9.

[0043] Figure 12 shows that a pressurizing member presses the outer surface of a cell while the cell and cooling tube are placed in a jig.

[0044] Figure 13 shows an axial member.

[0045] Figure 14 shows the driving unit.

[0046] Figure 15 shows a pressurization analysis in which the cell pressurizes the cooling tube.

[0047] Figure 16 briefly illustrates the cells pressurizing the cooling tube as they move to a preset position.

[0048] Figure 17 is a block diagram of the control unit.

[0049] Figure 18 is a flowchart showing the process of a jig combining a cell and a cooling tube.

[0050] Figure 19 shows the jig being fed into the jig transport unit.

[0051] Figure 20 shows that the jig has moved to the point where the driving part is located.

[0052] Figure 21 shows the aligner moving toward the jig.

[0053] Figure 22 shows the drive unit advancing and joining with the jig.

[0054] Figure 23 shows a robot placing a cooling pipe onto a jig.

[0055] Figure 24 shows a robot placing cells onto a jig.

[0056] FIG. 25 shows that the driving unit operates so that the pressurizing member pressurizes the cell first.

[0057] Figure 26 shows that the position sensor unit first measures the position of the cells.

[0058] FIG. 27 shows that the driving unit operates so that the pressurizing member pressurizes the cell a second time.

[0059] Figure 28 shows that the position sensor unit measures the position of the cells a second time.

[0060] FIG. 29 shows the drive unit being separated and the stopper and aligner moving away from the jig.

[0061] FIG. 30 shows that the jig moves away from the point where the drive unit is located and another jig moves to the drive unit.

[0062] Embodiments of the present invention will be described in more detail below with reference to the attached drawings. Regarding components of the present invention that can be clearly understood and easily reproduced by a person skilled in the art according to the prior art, specific descriptions thereof are omitted in order not to obscure the essence of the present invention.

[0063] The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings.

[0064] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0065] Additionally, terms including ordinal numbers, such as first, second, etc., used herein may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0066] Hereinafter, a bonding device and bonding method according to an embodiment of the present invention will be described.

[0067] The bonding device of the present invention is a device for forming a cell group. Specifically, the bonding device of the present invention is a device for combining cylindrical battery cells and a cooling tube.

[0068] In this specification, one cell group comprises two cell arrays and a cooling tube (20) disposed between the two cell arrays (see FIG. 6). Here, a cell array represents a plurality of cylindrical battery cells (10) arranged in a row. And, the plurality of cylindrical battery cells (10) of one cell group and the cooling tube (20) are bonded together.

[0069] To elaborate, a cell group has a structure in which a plurality of cylindrical battery cells (10) are arranged in a line along the length of the cooling tube (20) on both sides of the cooling tube (20), with the plurality of cylindrical battery cells (10) and the cooling tube (20) joined by an adhesive (23) (see FIG. 12). The sides of the cooling tube (20) represent the one side (21) and the other side (22) of the cooling tube (20) (see FIG. 6).

[0070] In other words, the bonding device of the present invention is a device that combines a plurality of cylindrical battery cells (10) and a cooling tube (20) to form a cell group.

[0071] As described in the background art, the cylindrical battery cell (10) represents a can-type secondary battery in which an electrode assembly is embedded in a cylindrical metal can. Since the cylindrical battery cell (10) is well known, a detailed description is omitted.

[0072] In the following, the 'cylindrical battery cell (10)' may be briefly referred to as 'cell (10)'.

[0073] The cooling tube (20) of the present invention is a pipe through which a refrigerant travels. As the refrigerant travels, it absorbs heat from the surroundings, so the temperature of the cell (10) in contact with the cooling tube (20) decreases.

[0074] The cooling tube (20) is formed in a plate shape with a preset thickness (see FIG. 6 and FIG. 7).

[0075] A channel through which refrigerant flows is formed inside the cooling pipe (20).

[0076] The cooling pipe (20) includes one side (21) and the other side (22). The one side (21) and the other side (22) are surfaces facing opposite each other based on thickness.

[0077] One side (21) (or the other side (22), hereinafter the same) of the cooling tube (20) has a preset size.

[0078] The horizontal length of one side (21) of the cooling pipe (20) is formed to be shorter than the vertical length. The horizontal and vertical lengths of the one side (21) represent directions that are horizontally orthogonal to each other in a two-dimensional plane (one side) (the thickness direction is excluded).

[0079] One side (21) or the other side (22) of the cooling pipe (20) is a two-dimensional plane having a horizontal length and a vertical length.

[0080] The horizontal length of one side (21) of the cooling pipe (20) can be named the ‘width of one side (21) of the cooling pipe (20)’ or the ‘width of the cooling pipe (20).’

[0081] And, the vertical length of one side (21) of the cooling pipe (20) can be named 'length of one side (21) of the cooling pipe (20)' or 'length of the cooling pipe (20)'.

[0082] One side (21) and the other side (22) of the cooling tube (20) are formed as continuous curved surfaces in the longitudinal direction of the cooling tube (20). The continuous curved surfaces are formed in a shape that is the same as or similar to a sine curve when viewed in the thickness direction of the cooling tube (20).

[0083] The cooling tube (20) can be formed from a metal material (e.g., aluminum (A1)).

[0084] An adhesive (23) is applied to one side (21) and the other side (22) of the cooling tube (20) (see FIG. 12). The adhesive (23) may be, for example, epoxy resin, but is not limited thereto and may be an adhesive of other materials.

[0085] The cell (10) and the cooling tube (20) are bonded by an adhesive (23).

[0086] The cooling tube (20) is placed in the jig (30) described later (see FIG. 5).

[0087] When the cooling tube (20) is placed on the jig (30), one side (21) and the other side (22) of the cooling tube (20) are arranged vertically.

[0088] Referring to FIGS. 1, FIGS. 2, FIGS. 4, FIGS. 5 and FIGS. 8, the bonding device of the present invention includes a jig (30).

[0089] The jig (30) accommodates the cell (10) and the cooling tube (20).

[0090] The jig (30) fixes the cell (10) and the cooling tube (20) to bond the cell (10) and the cooling tube (20).

[0091] The jig (30) includes a bottom plate (31) and side plates (32).

[0092] The bottom plate (31) and the side plates (32) may be formed integrally, or they may be manufactured separately and joined together. In this case, the joining may be done in various ways, such as by screw fastening or welding.

[0093] Each of the bottom plate (31) and the side plates (32) is formed into a plate shape with a preset thickness.

[0094] Each of the bottom plate (31) and the side plates (32) includes a first surface and a second surface. The first surface and the second surface are surfaces facing opposite each other based on thickness.

[0095] Each of the bottom plate (31) and the side plates (32) has a preset size (or other side, hereinafter the same).

[0096] The horizontal length of each side of the bottom plate (31) and the side plates (32) is formed to be shorter than the vertical length. Here, the horizontal and vertical lengths of the said side represent directions that are horizontally orthogonal to each other in a two-dimensional plane (side) (the thickness direction is excluded).

[0097] Each of the bottom plate (31) and the side plates (32) has one side and the other side as a two-dimensional plane with a horizontal length and a vertical length.

[0098] The horizontal length of one side of the base plate (31) can be named the 'width of one side of the base plate (31)' or the 'width of the base plate (31)'.

[0099] And, the vertical length of one side of the base plate (31) can be named 'length of one side (311) of the base plate (31)' or 'length of the base plate (31)'.

[0100] One side and the other side of the bottom plate (31) are arranged horizontally.

[0101] Meanwhile, the horizontal length of one side of the two-sided plate (32) can be named the 'width of one side of the two-sided plate (32)' or the 'width of the two-sided plate (32)'.

[0102] And, the vertical length of one side of the two-sided plate (32) can be named 'length of one side of the two-sided plate (32)' or 'length of the two-sided plate (32)'.

[0103] One side and the other side of the two plates (32) are arranged vertically.

[0104] The bottom plate (31) has a plurality of electrode insertion parts (313) (see FIG. 8).

[0105] When the cell (10) is placed on the jig (30), the positive electrode of the cell (10) faces the bottom plate (31) of the jig (30), and the negative electrode of the cell (10) faces the top of the jig.

[0106] The electrode insertion part (313) accommodates the positive electrode of the cell (10). That is, the positive electrode of the cell (10) is inserted and placed in the electrode insertion part (313).

[0107] Accordingly, the surface where the positive electrode is formed in the cell (10) and one surface of the bottom plate (31) come into contact.

[0108] Each of the multiple cells (10) housed in the jig (30) has a positively formed surface in contact with one side of the bottom plate (31), so the height of the cells (10) housed in the jig (30) can be constant. The height of the cells (10) represents the length between one side of the bottom plate (31) and the negative surface of the cells (10).

[0109] The electrode insertion portion (313) may be formed as a hole or a groove. The hole is a hole that penetrates the bottom plate (31), and the groove is a groove formed by being recessed to a predetermined depth from one side of the bottom plate (31).

[0110] Multiple electrode insertion portions (313) can be arranged at regular intervals in the width and length directions of the bottom plate (31).

[0111] For example, the plurality of electrode insertion parts (313) can be divided into a first group (313a) and a second group (313b).

[0112] Each of the first group (313a) and the second group (313b) has a plurality of electrode insertion parts (313).

[0113] The first group (313a) and the second group (313b) are spaced apart from each other in the width direction of the bottom plate (31).

[0114] A plurality of electrode inserts (313) belonging to the first group (313a) are arranged at regular intervals along the length of the bottom plate (31), and a plurality of electrode inserts (313) belonging to the second group (313b) are also arranged at regular intervals along the length of the bottom plate (31).

[0115] The electrode inserts (313) belonging to the second group (313b) are each positioned between adjacent electrode inserts (313) belonging to the first group (313a) in the width direction of the bottom plate (31).

[0116] For example, the first electrode insert (313) belonging to the second group (313b) is located between the first electrode insert (313) belonging to the first group (313a) and the second electrode insert (313) in the width direction of the bottom plate (31).

[0117] And, the second electrode insert (313) belonging to the second group (313b) is positioned between the second electrode insert (313) belonging to the first group (313a) and the third electrode insert (313) in the width direction of the bottom plate (31).

[0118] Since the positive electrode of the cell (10) is inserted into the electrode insertion part (313), the cell (10) is placed on the electrode insertion part (313). Therefore, the arrangement relationship of the cell (10) can be determined from the arrangement relationship of the electrode insertion part (313).

[0119] In the cell group, each of the plurality of cylindrical battery cells (10) arranged in a row on one side of the cooling tube (20) is placed between adjacent cylindrical battery cells (10) arranged in a row on the other side of the cooling tube (20).

[0120] That is, the cells (10) placed on the electrode inserts (313) of the second group (313b) are each placed between the cells (10) placed on the electrode inserts (313) of the first group (313a) in the width direction of the bottom plate (31) (see FIG. 6).

[0121] To elaborate, the cells (10) placed on the electrode inserts (313) of the first group (313a) and the cells (10) placed on the electrode inserts (313) of the second group (313b) are not placed on the same straight line in the width direction of the bottom plate (31).

[0122] The electrode insertion portion (313) is formed to have a preset length in the width direction of the bottom plate (31). The preset length of the electrode insertion portion (313) is formed to be longer than the width of the electrode insertion portion (313).

[0123] The positive electrode of the cell (10) placed in the electrode insertion part (313) can move in the width direction of the bottom plate (31). That is, the cell (10) can move in the width direction of the bottom plate (31) when pressurized.

[0124] Meanwhile, when the cooling tube (20) is placed on the bottom plate (31) of the jig (30), one side (21) of the cooling tube (20) faces one side of the side plate (321) of the jig (30), and the other side (22) of the cooling tube (20) faces one side of the other side plate (322) of the jig (30).

[0125] The cooling pipe (20) is positioned in the middle of the width direction of the bottom plate (31). The length direction of the cooling pipe (20) is positioned parallel to the length direction of the bottom plate (31).

[0126] The cooling tube (20) is seated on the cooling tube fixing part (312) placed on the bottom plate (31) of the jig (30).

[0127] The cooling pipe fixing part (312) is placed on the bottom plate (31) of the jig (30).

[0128] A plurality of cooling pipe fixing parts (312) are provided.

[0129] A plurality of cooling tube fixing parts (312) include a first fixing part (312a) and a second fixing part (312b).

[0130] The first fixing part (312a) and the second fixing part (312b) are respectively positioned on both sides (one side and the other side) of the bottom plate (31) in the longitudinal direction of the bottom plate (31), and are positioned in the middle of the bottom plate (31) in the width direction of the bottom plate (31).

[0131] The first fixed part (312a) is positioned at the edge of one side of the bottom plate (31) in the longitudinal direction of the bottom plate (31) and in the middle of the bottom plate (31) in the width direction of the bottom plate (31).

[0132] And, the second fixing part (312b) is positioned at the edge of the other side of the bottom plate (31) in the longitudinal direction of the bottom plate (31) and in the middle of the bottom plate (31) in the width direction of the bottom plate (31).

[0133] The distance between the first fixed part (312a) and the second fixed part (312b) can correspond to the length of the cooling pipe (20).

[0134] The cooling tube (20) includes one end and the other end. The one end and the other end of the cooling tube (20) represent ends positioned opposite each other along the length of the cooling tube (20).

[0135] One end of the cooling pipe (20) is placed in the first fixed part (312a), and the other end of the cooling pipe (20) is placed in the second fixed part (312b).

[0136] The adhesive (23) is transferred to the jig (30) while applied to one side (21) and the other side (22) of the cooling tube (20).

[0137] The side plates (32) of the jig (30) are placed on the edges of the bottom plate (31).

[0138] The side plates (32) are placed on the edges of both sides in the width direction of the bottom plate (31).

[0139] The two plates (32) represent one side plate (321) and the other side plate (322).

[0140] One side plate (321) (e.g., left plate) is placed on the left edge in the width direction of the bottom plate (31), and the other side plate (322) (e.g., right plate) is placed on the right edge in the width direction of the bottom plate (31).

[0141] One side of the two-sided plate (32) is positioned to be perpendicular to one side of the bottom plate (31).

[0142] One side of the one side plate (321) and one side of the other side plate (322) are arranged to face each other.

[0143] The jig (30) has a space. The space is formed by being surrounded by a bottom plate (31) and side plates (32).

[0144] Since the jig (30) has a bottom plate (31) and side plates (32) but does not have a top plate, the top of the jig (30) is open.

[0145] Multiple bearing holes (32h1) and multiple support holes (32h2) are formed in the two side plates (32).

[0146] The bearing hole (32h1) and the support hole (32h2) are holes that penetrate the two side plates (32).

[0147] The bonding device of the present invention includes a bearing member (38).

[0148] The bearing member (38) is placed in the bearing hole (32h1).

[0149] One or more bearing members (38) may be provided.

[0150] The bearing member (38) represents a bearing, which is a mechanical element. Since the bearing is well known, a detailed description is omitted and it is described briefly.

[0151] The bearing member (38) includes a ring-shaped inner ring, an outer ring surrounding the inner ring, and a ball or roller disposed between the inner ring and the outer ring. The inner ring and the outer ring can rotate relative to each other.

[0152] In the present invention, the outer ring of the bearing member (38) is fixed by contacting the inner surface of the two side plates (32) that surround the bearing hole (32h1), and the inner ring can rotate.

[0153] Multiple bearing holes (32h1) are arranged in a row and at regular intervals along the length of the side plates (32).

[0154] Multiple support holes (32h2) are formed in a position adjacent to the bearing hole (32h1). For example, two or more support holes (32h2) may be arranged around one bearing hole (32h1).

[0155] A guide support member (37) is placed in the support hole (32h2).

[0156] Meanwhile, a fastening member hole into which a fastening member (e.g., a bolt or screw, etc.) is inserted may be formed around the support hole (32h2). The fastening member hole may be formed as a groove or a hole penetrating the two side plates (32).

[0157] Referring to FIGS. 9 to 12, the bonding device of the present invention includes a pressurizing member (33).

[0158] A plurality of pressure members (33) are provided and placed in the space of the jig (30).

[0159] Specifically, the pressure member (33) is placed on one side of the bottom plate (31) of the jig (30) and is placed on one side of each of the two side plates (32) (one side plate (321) and the other side plate (322)).

[0160] The pressure member (33) is positioned at a preset distance from the bearing hole (32h1) formed in the two side plates (32).

[0161] The pressing member (33) presses the cell (10). The cell (10) is placed on one side of the bottom plate (31) in the space of the jig (30).

[0162] The pressure member (33) can reciprocate in the width direction of the bottom plate (31).

[0163] Specifically, the pressurizing member (33) can move toward the cell (10) or move toward the cell (10) away from it.

[0164] The pressure member (33) can be formed in the shape of a plate of a preset size.

[0165] The pressure member (33) includes one side (33a) and another side (33b). The one side (33a) and the other side (33b) are surfaces facing opposite each other.

[0166] One side (33a) of the pressure member (33) contacts the outer surface of the cell (10) and pushes the cell (10).

[0167] One side (33a) of the pressurizing member (33) is formed as a curved surface similar to the outer surface of the cell (10). Accordingly, the pressurizing member (33) can press the outer surface of the cell (10) evenly.

[0168] The pressure member (33) can rotate at a constant angle in the left and right directions.

[0169] A hinge rivet (33c) is placed on the upper and lower surfaces of the pressure member (33).

[0170] A hole (33h) in which a hinge rivet (33c) is placed is formed in the center of the upper and lower surfaces of the pressure member (33).

[0171] The pressure member (33) can rotate left and right using the hinge rivet (33c) as the axis of rotation.

[0172] Since the pressurizing member (33) can rotate in the left and right directions, during the process in which the pressurizing member (33) presses the cell (10), one side of the pressurizing member (33) can come into contact with the entire outer surface of the cell (10) regardless of the position of the cell (10). Accordingly, the pressurizing member (33) can press the entire outer surface of the cell (10) with a uniform force.

[0173] The bonding device of the present invention includes a pressure support member (34).

[0174] The pressure support member (34) is connected to the pressure member (33) and supports the pressure member (33).

[0175] The pressure support member (34) can be connected to the other side (33b) of the pressure member (33).

[0176] The connection between the pressure support member (34) and the pressure member (33) can be made by known fastening members such as bolts, nuts, and screws. The pressure support member (34) and the pressure member (33) are provided with a hole or groove in which the fastening member is placed.

[0177] The pressure support member (34) can be formed in the shape of a plate of a preset size.

[0178] A groove may be formed on the other side (33b) of the pressure member (33) to accommodate a pressure support member (34). The groove is formed by being sunk to a predetermined depth from the other side (33b) of the pressure member (33) toward the one side (33a). The size of the groove may correspond to the size of the pressure support member (34).

[0179] On the other side (33b) of the pressure member (33), grooves, holes, stepped surfaces and / or curves, etc., may be formed.

[0180] Hinge rivets (33c) are placed on the upper and lower surfaces of the pressure support member (34).

[0181] A hole (not labeled) in which a hinge rivet (33c) is placed is formed in the center of the upper and lower surfaces of the pressure support member (34).

[0182] The bonding device of the present invention includes a screw assembly (35).

[0183] The screw assembly (35) is connected to the pressure support member (34).

[0184] The screw assembly (35) is a transfer device that moves the pressure support member (34) in a straight line. Since the pressure support member (34) is connected to the pressure member (33), the screw assembly (35) is also a transfer device that moves the pressure member (33) in a straight line.

[0185] The screw assembly (35) may be, for example, a lead screw or a ball screw. Since lead screws and ball screws are well known, a detailed description is omitted.

[0186] The screw assembly (35) includes a screw member (351) and a nut member (352).

[0187] When the nut member (352) rotates, the screw member (351) moves in a straight line along the length of the screw member (351).

[0188] The screw member (351) is formed in a rod shape with a preset length.

[0189] The cross-section of the screw member (351) is circular, and a spiral screw thread is formed on the outer surface of the screw member (351) in the longitudinal direction of the screw member (351).

[0190] The screw member (351) includes one end and the other end. The one end and the other end are ends facing opposite directions.

[0191] One end of the screw member (351) is connected to the pressure support member (34), and the other end of the screw member (351) penetrates the bearing hole (32h1) formed in the side plate (32) of the jig (30) and protrudes toward the other side of the side plate (32).

[0192] One end of the screw member (351) can be connected to the center of the pressure support member (34). Accordingly, when the screw member (351) moves, the pressure support member (34) and the pressure member (33) can move stably without shaking.

[0193] The nut member (352) is not limited to a specific shape and can be formed in any shape.

[0194] The nut member (352) has a through hole that penetrates the nut member (352). On the inner surface of the nut member (352) surrounding the through hole, a screw groove corresponding to the screw thread of the screw member (351) is formed.

[0195] The screw member (351) is placed in the through hole of the nut member (352).

[0196] A nut member (352) is placed in a bearing hole (32h1) provided in the side plate (32) of the jig (30). Specifically, the nut member (352) is placed in a through hole of a bearing member (38) placed in the bearing hole (32h1).

[0197] The nut member (352) can be rotated by the bearing member (38).

[0198] When the nut member (352) is rotated while inserted into the through hole of the bearing member (38), the screw member (351) can move linearly in the longitudinal direction of the screw member (351).

[0199] That is, the screw member (351) can move in a straight line along the length of the through hole of the nut member (352).

[0200] The bonding device of the present invention includes a guide member (36).

[0201] The guide member (36) supports the pressure support member (34) so ​​that the pressure support member (34) moves stably without shaking when the pressure support member (34) moves in a straight line, and guides the movement of the pressure support member (34).

[0202] The guide member (36) is formed in the shape of a rod with a preset length.

[0203] The cross-section of the guide member (36) can be circular.

[0204] The guide member (36) includes one end and the other end. The one end and the other end are ends facing opposite directions.

[0205] Multiple guide members (36) may be provided.

[0206] One end of the guide member (36) is connected to the pressure support member (34), and the other end of the guide member (36) is connected to the guide support member (37) placed on the side plates (32) of the jig (30).

[0207] One end of the guide member (36) can be connected to a position adjacent to the edge of the pressure support member (34). As the one ends of each of the multiple guide members (36) are connected to a position adjacent to the edge of the pressure support member (34), the pressure support member (34) can move stably without shaking when moving.

[0208] The bonding device of the present invention includes a guide support member (37).

[0209] The guide support member (37) is placed and fixed in the support hole (32h2) formed in the side plate (32) of the jig (30).

[0210] The guide support member (37) supports the guide member (36).

[0211] In addition, the guide support member (37) prevents the guide member (36) from shaking when the guide member (36) moves.

[0212] The guide support member (37) can be, for example, a bushing.

[0213] The guide support member (37) has a through hole. A guide member (36) is placed in the through hole. The guide member (36) can move back and forth in a straight line while placed in the through hole.

[0214] The bonding device of the present invention includes an axial member (39) (see FIG. 13).

[0215] FIG. 13 (a) is a perspective view showing an axis member (39), and FIG. 13 (b) shows a center hole (391h, 392h).

[0216] The shaft member (39) can be rotated by a motor (first motor) (42) described later.

[0217] The shaft member (39) is connected to the nut member (352). When the shaft member (39) rotates, the nut member (352) also rotates.

[0218] The shaft member (39) is formed in the shape of a rod of a preset length.

[0219] The shaft member (39) includes one side (391) and the other side (392). The one side (391) and the other side (392) represent opposite sides in the longitudinal direction of the shaft member (39).

[0220] The shaft member (39) has a center hole (391h, 392h).

[0221] The center hole (391h, 392h) is a hole that penetrates the shaft member (39) in the longitudinal direction of the shaft member (39).

[0222] To elaborate, the center hole (391h, 392h) is a hole that penetrates one side (391) and the other side (392) of the shaft member (39).

[0223] A screw member (351) is placed in the center hole (391h, 392h).

[0224] The screw member (351) is placed in the through hole of the nut member (352) and the center hole (391h, 392h) of the shaft member (39).

[0225] One side (391) of the shaft member (39) is placed in a bearing hole (32h1) provided in the side plates (32) of the jig (30).

[0226] One side (391) of the shaft member (39) is placed in the through hole of the bearing member (38) placed in the bearing hole (32h1).

[0227] To elaborate, one side (391) of the shaft member (39) is fitted into the through hole of the inner ring of the bearing member (38). Accordingly, the shaft member (39) can rotate together with the inner ring of the bearing member (38).

[0228] The diameter of the center hole (391h) on one side (391) of the shaft member (39) is larger than the diameter of the center hole (392h) on the other side (392). A part of the nut member (352) is inserted and positioned in the center hole (391h) on one side (391) of the shaft member (39).

[0229] To summarize the arrangement relationship, a portion of the nut member (352) is inserted into the center hole (391h) on one side (391) of the shaft member (39).

[0230] And, the other end of the screw member (351) is positioned to protrude toward the other side of the side plate (32) of the jig (30) by passing through the through hole of the nut member (352) and the center hole (391h, 392h) of the shaft member (39).

[0231] And, a bearing member (38) is disposed on the outer surface of one side (391) of the shaft member (39), and the bearing member (38) is disposed in the bearing hole (32h1) of the side plate (32) of the jig (30).

[0232] The inner surface of the inner ring of the bearing member (38) is joined by contacting the outer surface of one side (391) of the shaft member (39), and the outer surface of the outer ring of the bearing member (38) is joined by contacting the inner surface of the bearing hole (32h1). The outer ring of the bearing member (38) is fixed, and the inner ring can rotate.

[0233] When the shaft member (39) and the nut member (352) are rotated by the first motor (42), the screw member (351) moves linearly in the longitudinal direction of the screw member (351).

[0234] The other side (392) of the shaft member (39) is positioned to protrude from the other side of the side plate (32) of the jig (30).

[0235] A plurality of surfaces are arranged in a circumferential direction on the outer surface of the other side (392) of the shaft member (39). To elaborate, the outer surface of the other side (392) of the shaft member (39) is formed in a shape similar to a polygonal bolt.

[0236] The other side (392) of the shaft member (39) is coupled with the socket member (41) of the driving unit (40) described later.

[0237] The other side (392) of the shaft member (39) is inserted into the polygonal groove of the socket member (41).

[0238] The bonding device of the present invention includes a driving unit (40) (see FIG. 2, FIG. 3 and FIG. 14).

[0239] Multiple driving units (40) are provided.

[0240] The driving unit (40) is provided in the same number as the number of cells (10) that are seated on the jig (30).

[0241] The driving unit (40) rotates the shaft member (39) so that the pressing member (33) presses the cell (10).

[0242] The driving unit (40) rotates the shaft member (39) to cause the pressing member (33) to move back and forth in a straight line. Specifically, the driving unit (40) rotates the shaft member (39) to cause the pressing member (33) to move toward the cell (10) or away from the cell (10).

[0243] The driving unit (40) is placed on the support (50).

[0244] The support (50) is a frame that supports the drive unit (40).

[0245] The drive unit (40) and the support (50) are positioned in a section of the jig transport unit (70) that moves the jig (30).

[0246] A plurality of drive units (40) are arranged on both sides of the jig transport unit (70) in a section of the jig transport unit (70) and are arranged in a line along the length of the jig transport unit (70). The two sides of the jig transport unit (70) represent one side and the other side of the jig transport unit (70) (see FIG. 1).

[0247] When the jig (30) is moved by the jig transport unit (70) and reaches a point where the driving units (40) are positioned, the driving units (40) are arranged in a line along the length of the side plates (32) on the other side of the side plates (32) of the jig (30).

[0248] In other words, a plurality of driving units (40) are arranged in a line along the length of the jig (30) on one side plate (321) and the other side plate (322) of the jig (30).

[0249] Some of the multiple drive units (40) (which may be referred to as ‘one-sided drive units (40a)’) are arranged in a line along the length of the one-sided plate (321) on the other side of the one-sided plate (321) of the jig (30). The one-sided drive units (40) are placed on a support (50) (which may be referred to as ‘one-sided support (50a)’).

[0250] And, the remaining portion of the plurality of drive units (40) (which may be referred to as 'other drive units (40b)') is arranged in a line along the length of the other plate (322) on the other side of the other plate (322) of the jig (30). The other drive units (40) are placed on a support (50) (which may be referred to as 'other support (50b)').

[0251] Each of the one-sided support (50a) and the other-sided support (50b) may be a single component or may be a combination of multiple components.

[0252] Each driving unit (40) includes a socket member (41) and a motor (first motor) (42).

[0253] The socket member (41) is connected to the rotation axis of the first motor (42) (or the output axis of the reduction gear (421)).

[0254] In this specification, the rotation axis of the first motor (42) refers to a rotation axis provided in the motor (42) itself, and includes the output axis of the reduction gear (421) when a reduction gear (421) is provided. The output axis refers to a rotation axis provided in the reduction gear (421).

[0255] The socket member (41) can be rotated by the first motor (42).

[0256] When the driving unit (40) approaches the shaft member (39) placed on the jig (30) on the support (50), the socket member (41) engages with the shaft member (39).

[0257] When the first motor (42) is driven while the socket member (41) is combined with the shaft member (39), the socket member (41) and the shaft member (39) rotate.

[0258] When the socket member (41) rotates in one rotational direction, the shaft member (39) and the nut member (352) rotate in one rotational direction. The screw member (351) connected to the nut member (352) moves toward the cell (10) placed on the jig (30). The pressure support member (34) connected to the screw member (351) moves toward the cell (10). The pressure member (33) connected to the pressure support member (34) presses the outer surface of the cell (10).

[0259] Even if the socket member (41) and the shaft member (39) are separated while the pressing member (33) is pressing the cell (10), the state in which the pressing member (33) presses the cell (10) is maintained because the nut member (352) does not rotate in the opposite direction of the rotational direction.

[0260] The socket member (41) is formed in the shape of a rod of a preset length.

[0261] The socket member (41) includes one side and the other side. The one side and the other side represent opposite sides in the longitudinal direction of the socket member (41).

[0262] One side of the socket member (41) is provided with a side surface, and the other side is provided with a side surface. The one side surface and the other side surface are surfaces facing opposite directions and are surfaces arranged in a direction orthogonal to the longitudinal direction of the socket member (41).

[0263] One side of the socket member (41) has a groove (not labeled) formed on one side, and the other side of the socket member (41) has a groove (not labeled) formed on the other side.

[0264] One side groove is a groove that is recessed to a predetermined depth in the longitudinal direction of the socket member (41) from one side (toward the other side), and the other side groove is a groove that is recessed to a predetermined depth in the longitudinal direction of the socket member (41) from the other side (toward the one side).

[0265] According to an embodiment of the present invention, a hole (through hole) communicating with the one groove and the other groove may be formed on the bottom surface of one groove and the bottom surface of the other groove.

[0266] One side groove is a polygonal groove. That is, the inner surface of the one side groove consists of multiple faces arranged in the circumferential direction at a constant angle.

[0267] The other side (392) of the shaft member (39) is inserted into one side of the groove.

[0268] Since the inner surface of the groove on one side of the socket member (41) and the outer surface of the other side (392) of the shaft member (39) are formed as angled surfaces, when the socket member (41) rotates while the other side (392) of the shaft member (39) is inserted into the groove on one side, the shaft member (39) also rotates.

[0269] The rotation axis of the first motor (42) is connected to the other groove. That is, the rotation axis of the first motor (42) is inserted into and fixed in the other groove.

[0270] The first motor (42) refers to an electric motor that obtains rotational power from electric energy.

[0271] A reducer (421) can be placed on the rotating shaft of the first motor (42).

[0272] Alternatively, according to an embodiment of the present invention, the first motor (42) may include a reduction gear (421) inside it.

[0273] The first motor (42) and the reduction gear (421) are well-known mechanical devices, so a description thereof is omitted.

[0274] The driving unit (40) can move back and forth in a straight line on the support (50).

[0275] To elaborate, the driving unit (40) can move toward or away from the shaft member (39) positioned on the jig (30) on the support (50) (see FIG. 3).

[0276] Specifically, each of the one-sided drive units (40a) can move toward or away from the shaft member (39) positioned on the one-sided plate (321) of the jig (30) on the one-sided support (50a).

[0277] And, each of the other driving units (40b) can move toward or away from the shaft member (39) positioned on the other plate (322) of the jig (30) on the other support (50b).

[0278] According to an embodiment of the present invention, the bonding device of the present invention may be equipped with a linear motion guide (LM Guide) (43), a cylinder device (not shown), or a motor device (not shown) that is necessary for the driving unit (40) to move in a straight reciprocating motion.

[0279] A linear movement guide (43) can be placed between each of the multiple drive units (40) and the support (50).

[0280] The linear movement guide (43) is a well-known transfer device, so it will be briefly explained.

[0281] The linear movement guide (43) includes a linear body (431) and a linear rail (432).

[0282] The linear body (431) is formed in a block shape.

[0283] The linear body (431) may be one or more. Multiple linear bodies (431) may be placed on a single linear rail (432).

[0284] The linear body (431) can be coupled to one side (e.g., the lower side) of the drive unit (40) (specifically, the first motor (42) or the reduction gear (421)). The coupling can be achieved by a fastening member such as a screw.

[0285] The linear body (431) can move along the linear rail (432). Accordingly, the drive unit (40) combined with the linear body (431) can also move.

[0286] The linear body (431) is movably coupled to the linear rail (432).

[0287] The linear rail (432) can be placed on the support (50).

[0288] The linear rail (432) is formed in a rod shape with a preset length and may be one or more.

[0289] Multiple linear rails (432) are spaced apart by a preset distance and arranged parallel to each other.

[0290] The linear rail (432) is positioned such that the longitudinal direction of the linear rail (432) is in the same direction as the width direction of the bottom plate (31) of the jig (30). Accordingly, the linear body (431) and the drive unit (40) can move along the linear rail (432) toward or away from the shaft member (39) positioned in the jig (30).

[0291] According to an embodiment of the present invention, a connecting member (44) connecting the driving unit (40) (specifically the first motor (42) or reduction gear (421)) and the linear body (431) may be disposed between the driving unit (40) and the linear body (431).

[0292] The connecting member (44) may be a single component or a plurality of components combined with each other.

[0293] One side of the connecting member (44) is connected to the driving unit (40), and the other side of the connecting member (44) is connected to the linear body (431).

[0294] The connecting member (44) is not limited to a specific shape and can be formed in various shapes.

[0295] Meanwhile, the cylinder device or motor device provides the driving force required for the drive unit (40) to move.

[0296] The cylinder device is driven by pneumatic or hydraulic pressure.

[0297] A cylinder device comprises a cylinder into which a fluid flows in or out, a piston movable within the cylinder, and a piston rod connected to and movable with respect to the piston. Hereinafter, the fluid includes a gas such as air and a liquid such as oil.

[0298] The above cylinder, piston, and piston rod represent conventionally used cylinders, pistons, and piston rods, so a detailed description is omitted.

[0299] Additionally, the cylinder device includes a fluid supply line connected to the cylinder and a fluid compressor connected to the fluid supply line.

[0300] A fluid supply line is a passage through which fluid moves. In other words, fluid can flow into or out of a cylinder through the fluid supply line.

[0301] One side of the fluid supply line is connected to a cylinder, and the other side of the fluid supply line is connected to a fluid compressor.

[0302] A fluid compressor moves fluid in a fluid supply line. Specifically, the fluid compressor causes the fluid to move within the fluid supply line to flow into or out of a cylinder.

[0303] When fluid flows into the cylinder by the fluid compressor, the piston moves toward the outside of the cylinder, and when fluid flows out of the cylinder, the piston moves toward the inside of the cylinder.

[0304] The piston rod is formed in a rod shape with a preset length in one direction.

[0305] The piston rod includes one end and the other end opposite to the one end. The one end and the other end of the piston rod represent both ends in a rod shape.

[0306] One end of the piston rod penetrates the cylinder and is exposed to the outside of the cylinder, and is connected to the linear body (431) or connecting member (44) of the linear movement guide (43).

[0307] The other end of the piston rod is connected to the piston.

[0308] When the piston rod moves due to the movement of the piston, the drive unit (40) connected to the linear body (431) or the connecting member (44) moves.

[0309] The motor device comprises a motor (second motor) and components connected thereto.

[0310] The second motor represents an electric motor such as the motor (first motor) (42) of the aforementioned drive unit (40).

[0311] The above components represent a ball screw and other components supporting the ball screw.

[0312] The screw of the ball screw can be connected to the rotation axis of the second motor, and the nut of the ball screw can be connected to the linear body (431) or the connecting member (44) of the linear movement guide.

[0313] When the second motor operates, the screw of the ball screw rotates and the nut moves linearly along the length of the screw. Accordingly, the drive unit (40) connected to the linear body (431) or the connecting member (44) moves.

[0314] The bonding device of the present invention includes a position sensor (Sensor) part (60).

[0315] The position sensor unit (60) may be, for example, a known vision sensor or a vision camera.

[0316] One or more position sensor units (60) may be provided.

[0317] The position sensor unit (60) is placed on the point where the driving unit is placed, that is, on the jig (30).

[0318] In manufacturing a cell group, when the cells (10) and the cooling tube (20) are combined, the cells (10) must be positioned at a preset location.

[0319] This is because when a busbar is joined to the upper surface of the cells (10) (e.g., by welding), if the cells (10) are not positioned at a preset location, a failure in connection occurs between the cells (10) and the busbar. The busbar is responsible for the electrical connection between the cells (10).

[0320] The position sensor unit (60) is a sensor that detects (measures) the position of the cell (10) placed on the jig (30).

[0321] The position sensor unit (60) measures the position of the cell (10) when the driving unit (40) presses the cell (10).

[0322] The position sensor unit (60) can obtain an image by photographing the cells (10) and cooling pipe (20) placed on the jig (30), and obtain position data of the cells (10) by measuring the position of the cells (10) from the image.

[0323] The position sensor unit (60) can transmit position data of the cells (10) to the control unit (100) (see FIG. 17).

[0324] Meanwhile, according to an embodiment of the present invention, the position sensor unit (60) can obtain an image by photographing the jig (30) and obtain position data of the jig (30) by measuring the position of the jig (30) from the image.

[0325] The position sensor unit (60) can transmit position data of the jig (30) to the control unit (100).

[0326] The bonding device of the present invention includes a pressure sensor unit (61) (see FIG. 17).

[0327] The pressure sensor unit (61) may be, for example, a known load cell. A load cell is a sensor that converts force into an electrical signal for measurement.

[0328] The pressure sensor unit (61) is not limited to a load cell and includes various sensors capable of measuring force (pressure).

[0329] The pressure sensor part (61) is placed on the pressurizing member (33).

[0330] The pressure sensor part (61) is attached to one side of the pressurizing member (33) and measures the pressure applied by the pressurizing member (33) to the outer surface of the cell (10).

[0331] The pressure sensor unit (61) can obtain pressure data by measuring the pressure applied to each of the cells (10).

[0332] The pressure sensor unit (61) can transmit pressure data of each of the cells (10) to the control unit (100).

[0333] The control unit (100) is composed of various electrical and electronic components. The electrical and electronic components include a printed circuit board (PCB), various semiconductor chips, memory, various sensors, wires, etc.

[0334] The control unit (100) controls the overall operation of the manufacturing device of the present invention by controlling the position sensor unit (60), the pressure sensor unit (61), the jig transport unit (70), the driving unit (40), and the cylinder device (or motor device).

[0335] The control unit (100) can provide or process appropriate information or functions to the user by processing signals, data, information, etc. that are input or output through the position sensor unit (60), pressure sensor unit (61), jig transport unit (70), driving unit (40), and cylinder device (or motor device), or by running an application stored in memory.

[0336] The control unit (100) can receive position data of the cells (10) from the position sensor unit (60).

[0337] The control unit (100) can drive the driving unit (40).

[0338] The control unit (100) can control the torque of the motor (42) of the drive unit (40) to control the pressure applied by the pressurizing member (33) to the cell (10). Accordingly, the control unit (100) can adjust (control) the position of the cell (10).

[0339] The control unit (100) can analyze the location data of the cells (10) and drive a drive unit (target drive unit) (40) associated with a cell (target cell) (10) that is not located at a preset point among the cells (10) so that the target cell (10) is located at a preset point.

[0340] The above target driving unit (40) represents a driving unit (40) connected to a pressurizing member (33) that pressurizes the target cell (10).

[0341] When the control unit (100) operates the driving units (40) to individually pressurize the cell(s) (10), the cell(s) (10) move, and because the cooling pipe (20) is deformed by the movement of the cell(s) (10), the positions of the cell(s) (10) and the cooling pipe (20) change (see FIG. 15 and FIG. 16).

[0342] Referring to FIG. 15, FIG. 15 is simulation measurement data showing the deformation of the cooling tube (20) when the cells (10) pressurize the cooling tube (20).

[0343] FIG. 15 (a) shows that when each of the 40 cells (10) is pressurized to 3.5 kgf, the cooling tube (20) bends up to a maximum width of 0.02 mm.

[0344] Figures 15 (b) and (c) show that when each of the 40 cells (10) is pressed with 3.5 kgf and the second fixing part (312b) is additionally pressed with 3.5 kgf, the cooling tube (20) bends up to a maximum width of 0.015 mm (see (b)) and stress is concentrated on the first fixing part (312a) (see (c)).

[0345] Figures 15 (d) and (e) show that when each of the 40 cells (10) is pressed with 3.5 kgf, and additionally the first fixing part (312a) is pressed with 0.75 kgf and the second fixing part (312b) is pressed with 2.5 kgf, the cooling tube (20) bends to a maximum width of 0.0015 mm (see (d)) and the maximum stress is 3.4 MPa (see (e)). The 3.4 MPa is 6.74% of the yield stress of 50 MPa of AL6063 material. (d) and (e) show the deformation of the cooling tube (20).

[0346] Referring to FIG. 16, when a cooling pipe (20) is to be placed, for example, at a reference line (RL) and cells (10) are to be placed at a preset position, a cell (10) that is short of the cooling pipe (20) is moved by a first moving distance, and a cell (10) that is relatively far from the cooling pipe (20) is moved by a second moving distance that is shorter than the first moving distance. The first moving distance and the associated pressure, and the second moving distance and the associated pressure are determined by the torque of the motor. At this time, the moving distance and the pressure may be proportional.

[0347] The position sensor unit (60) can detect (measure) the position of the cells (10) in real time.

[0348] And, the control unit (100) can calculate the amount of position change of the cells (10) from the position data of the cells (10), and can adjust (control) the pressure of the driving units (40) so that a pressure corresponding to the amount of position change can be applied to the cells (10). The adjustment of the pressure of the driving units (40) is achieved by adjusting the torque of the motor (42) of the driving units (40).

[0349] In addition, the control unit (100) can receive position data of the jig (30) from the position sensor unit (60).

[0350] The control unit (100) can drive the jig transport unit (70).

[0351] The control unit (100) can analyze the position data of the jig (30) and, if the jig (30) is not located at a preset point, drive the jig transport unit (70) so that the jig (30) is located at a preset point.

[0352] Additionally, the control unit (100) can receive pressure data of the cells (10) from the pressure sensor unit (61).

[0353] The control unit (100) can control the pressure applied by the pressurizing member (33) to the cells (10) using pressure data of the cells (10). The control of the pressure is achieved by the control unit (100) controlling (adjusting) the torque of the motor (42).

[0354] The description of a bonding method for combining a plurality of cylindrical battery cells (10) and a cooling tube (20) using the aforementioned bonding device is as follows.

[0355] The bonding method proceeds in the order of the pressurization preparation step, the first pressurization step, the first position measurement step, the second pressurization step, the second position measurement step, and the pressurization completion step.

[0356] The pressurization preparation step is a step in which a jig (30) moves to a section where a plurality of drive units (40) are arranged (S10), a plurality of drive units (40) move to the moved jig (30) and connect to the jig (30) (S10), and a plurality of cylindrical battery cells (10) and a cooling pipe (20) are placed on the moved jig (30) to form a structure of a cell group (S20, S30).

[0357] The first pressurization step (S40) is a step in which a plurality of driving units (40) operate to pressurize all of the plurality of cylindrical battery cells (10) placed on the jig (30).

[0358] The first position measurement step (S50) is a step of measuring the positions of a plurality of cylindrical battery cells (10) after the first pressurization step, and analyzing the position data of the plurality of cylindrical battery cells (10) to calculate the position of a cylindrical battery cell (target cell) (10) that is not located at a preset point.

[0359] The second pressurization step (S60) is a step in which a driving unit (target driving unit) (40) connected to the target cell (10) operates to pressurize the target cell (10).

[0360] The second position measurement step (S70) is a step of measuring the positions of a plurality of cylindrical battery cells (10) after the second pressurization step, and analyzing the position data of the plurality of cylindrical battery cells (10) to calculate the position of the target cell (10).

[0361] The pressurization completion step (S80) is a step in which, after the second position measurement step, when a plurality of cylindrical battery cells (10) and a cooling pipe (20) are placed at a preset position, a plurality of driving units (40) are separated from the jig (30), and the jig (30) moves away from the point where the plurality of driving units (40) are placed.

[0362] FIGS. 18 to 30 illustrate the movement process of the jig (30) and the process (process sequence) of combining the cell (10) and the cooling tube (20). The process of manufacturing a cell group using the jig (30) is carried out in the following specific sequence.

[0363] (1) When the manufacturing process of the cell group begins, the jig (30) is fed into the jig transport unit (70) (S10). Then, the jig (30) is moved by the jig transport unit (70) (see FIG. 19).

[0364] The jig transport section (70) is arranged in a long direction.

[0365] The jig transport unit (70) is a mechanical device that continuously transports the jig (30). For example, the jig transport unit (70) may be a conveyor.

[0366] The jig transport unit (70) can continuously transport the jig (30) in various ways, such as a belt, chain, or roller.

[0367] Driving units (40) are arranged in a section of a jig transport unit (70) that is long and unidirectional.

[0368] The driving units (40) are positioned on both sides (e.g., left and right) of the jig transport unit (70) and are positioned at a predetermined distance from the jig transport unit (70).

[0369] Specifically, one driving unit (40a) is positioned on one side (e.g., left) of the jig transport unit (70), and the other driving unit (40b) is positioned on the other side (e.g., right) of the jig transport unit (70).

[0370] The jig (30) moves to a section of the jig transport unit (70) where the drive unit (40) is placed (see FIG. 20).

[0371] The jig (30) is stopped by a stopper (80).

[0372] The stopper (80) is placed at one point of the jig transport unit (70) where the drive unit (40) is placed.

[0373] The stopper (80) can be positioned below the jig transport unit (70) and rise, and can be lowered below the jig transport unit (70) when the jig (30) moves.

[0374] When the jig (30) is stopped by the stopper (80), the jig transport unit (70) stops driving.

[0375] Then, the aligner (81) moves to align the preset position of the jig (30). The movement of the aligner (81) can be achieved by a cylinder device or a motor device (see FIG. 21).

[0376] The aligner (81) is positioned adjacent to the drive unit (40).

[0377] Specifically, the aligner (81) is positioned at adjacent locations at the front and rear of the jig (30) along the longitudinal direction of the jig (30) while the jig (30) is stationary. Here, the front of the jig (30) points forward in the direction in which the jig (30) moves, and the rear of the jig (30) points backward in the direction in which the jig (30) moves.

[0378] When the jig (30) stops, the aligner (81) moves to the front corner and the rear corner of the jig (30) (e.g., the base plate (31)) so that the jig (30) is aligned to a preset position.

[0379] (2) The driving unit (40) moves toward the jig (30) (see FIG. 22).

[0380] As described above, the movement of the drive unit (40) is achieved by a cylinder device or a motor device.

[0381] With the movement of the drive unit (40), the socket member (41) of the drive unit (40) is connected to the shaft member (39) placed on the jig (30). The connection between the socket member (41) and the shaft member (39) is achieved by inserting the other side (392) of the shaft member (39) into a groove on one side of the socket member (41).

[0382] (3) A robot (first robot) moves the cooling pipe (20) so that the cooling pipe (20) is placed on the bottom plate (31) of the jig (30) (S20) (see FIG. 23). The first robot is an automated device that moves the cooling pipe (20).

[0383] (4) A robot (second robot) moves a plurality of cells (10) so that the plurality of cells (10) are placed on the bottom plate (31) of the jig (30) (S30) (see FIG. 24). The second robot is an automated device that moves the cells (10).

[0384] Multiple cells (10) are arranged in a line along the length of the cooling tube (20) on one side (21) and the other side (22) of the cooling tube (20) (see FIG. 6).

[0385] The outer surface of the cell (10) includes a first outer surface and a second outer surface. The first outer surface and the second outer surface are outer surfaces positioned opposite each other. The opposite side includes not only the exact opposite side but also the adjacent part.

[0386] When cells (10) and cooling pipes (20) are placed on a jig (30) (bottom plate (31)), the outer surface (first outer surface) of each cell (10) placed on one side (21) of the cooling pipe (20) faces the one side (21) of the cooling pipe (20), and the outer surface (second outer surface) of each cell (10) faces the one side (33a) of the pressurizing member (33) placed on one side plate (321) of the jig (30).

[0387] Additionally, the outer surface (first outer surface) of each cell (10) placed on the other side (22) of the cooling pipe (20) faces the other side (22) of the cooling pipe (20), and the outer surface (second outer surface) of each cell (10) faces one side (33a) of the pressure member (33) placed on the other side plate (322) of the jig (30).

[0388] One side (21) and the other side (22) of the cooling pipe (20) have adhesive (23) applied to them (see FIG. 12).

[0389] (5) One driving unit (40a) and the other driving unit (40b) operate to first press the cells (10) placed on the jig (30) (S40) (see FIG. 25). At this time, the driving units (40) press all the cells (10) with the same torque.

[0390] When the driving units (40a) on one side operate to move the pressure members (33) placed on the one side plate (321) of the jig (30), the one side (33a) of the pressure member (33) and the outer surface (second outer surface) of each of the cells (10) come into contact, and due to the movement of the pressure member (33), the outer surface (first outer surface) of each of the cells (10) and the one side (21) of the cooling pipe (20) come into contact (see FIG. 16).

[0391] Then, when the other driving units (40b) operate to move the pressure members (33) placed on the other plate (322) of the jig (30), the one surface (33a) of the pressure member (33) and the outer surface (second outer surface) of each of the cells (10) come into contact, and due to the movement of the pressure member (33), the outer surface (first outer surface) of each of the cells (10) and the other surface (22) of the cooling pipe (20) come into contact (see FIG. 16).

[0392] As described above, as the one-sided drive unit (40a) and the other-sided drive unit (40b) operate, the cells (10) and the cooling pipe (20) move to a preset position.

[0393] (6) The position sensor unit (60) first measures the position of each of the cells (10) (S50) (see FIG. 26).

[0394] The position sensor unit (60) transmits the position data of the cells (10) to the control unit (100).

[0395] The control unit (100) analyzes the position data of the cells (10) and calculates the position of the cell (target cell) (10) that is not located at a preset point among the cells (10) (measurement of cell position offset dimension).

[0396] (7) A driving unit (target driving unit) (40) connected to the target cell (10) operates to pressurize the target cell (10) secondarily (S60) (see FIG. 27). The target cell (10) may be one or multiple. In this case, the driving units (40) do not pressurize all cells (10) with the same torque, but rather the target driving unit (40) pressurizes the target cell (10) individually based on offset dimensions.

[0397] The control unit (100) analyzes pressure data of the cells (10) and controls the pressure applied to the target cell (10).

[0398] (8) The position sensor unit (60) measures the position of each of the cells (10) in a second step (S70) (see FIG. 28).

[0399] The position sensor unit (60) transmits the position data of the cells (10) to the control unit (100).

[0400] The control unit (100) analyzes the position data of the cells (10) and calculates the position of the cell (target cell) (10) that is not located at a preset point among the cells (10) (measuring the cell position offset dimension).

[0401] The aforementioned steps (7) (S60) and (8) (S70) are repeated until the multiple cells (10) and the cooling tube (20) reach a preset position.

[0402] As the one-sided drive unit (40a) and the other-sided drive unit (40b) operate individually, the cells (10) and the cooling tube (20) move to a preset position. In this state, the cells (10) and the cooling tube (20) are in a state of pressing against each other and are bonded by an adhesive (23).

[0403] (9) When the cells (10) and cooling pipe (20) placed on the jig (30) are placed at a preset position, the driving unit (40) and the aligner (81) move away from the jig (30) and the stopper (80) lowers (see FIG. 29).

[0404] When the drive unit (40) is separated from the jig (30), the jig (30) is moved by the jig transport unit (70) away from the point where the drive unit (40) is placed (S80) (see FIG. 30). Then, the next jig (30) moves to the drive unit (40).

[0405] Even if the drive unit (40) is separated from the jig (30) and the jig (30) moves, the cells (10) and the cooling pipe (20) placed on the jig (30) are maintained in a state of mutual pressure.

[0406] This is because the screw members (351) have not moved to their original positions (because the nut members (352) have not rotated in the opposite direction to the direction in which they first rotated), so the pressure members (33) connected to the screw members (351) are in a state of continuously pressing the cells (10).

[0407] Thus, even after the drive unit (40) is separated from the jig (30), the pressurized state between the cells (10) and the cooling tube (20) can be maintained for a certain period of time.

[0408] The bonding device and bonding method of the present invention described above can maximize the distance between a plurality of cells (10), maximize the distance between a plurality of cells (10) and a cooling pipe (20), and allow for thermal management of each of the plurality of cells (10) by a control unit.

[0409] In addition, the bonding device and bonding method of the present invention improve the fixing force by increasing the bonding area between the cell (10) and the cooling tube (20), and improve the temperature management efficiency of the cell (10) by ensuring that the cooling tube (20) is in close contact with the side of the cell (10).

[0410] In addition, the bonding device and bonding method of the present invention improve the positional precision of the cells (10), thereby improving the assembly quality and yield of the battery module or battery pack.

[0411] In addition, the bonding device and bonding method of the present invention improve production yield by measuring the positions of the cells (10) before and after bonding by providing a position sensor unit (60).

Claims

1. A bonding device for combining the plurality of cylindrical battery cells and the cooling tube in a cell group having a structure in which a plurality of cylindrical battery cells are arranged in a row along the length of the cooling tube on one side and the other side of the cooling tube coated with adhesive, A jig accommodating the above cell group; and It includes a plurality of driving units arranged in a row along the longitudinal direction of the jig on one side plate and the other side plate of the jig, and moving the pressing members arranged on the jig so that the pressing members press the cylindrical battery cells. The positive electrode of each of the plurality of cylindrical battery cells is disposed in each of the plurality of electrode insertion parts formed on the bottom plate of the jig, and Each of the plurality of cylindrical battery cells arranged in a row on one side of the cooling tube is positioned between adjacent cylindrical battery cells arranged in a row on the other side of the cooling tube, and A bonding device in which the plurality of cylindrical battery cells and the cooling tube are bonded by the adhesive by the pressure of the above-mentioned pressure member.

2. In Paragraph 1, The above jig has side plates disposed on the edges of both sides of the base plate, and A plurality of bearing holes and a plurality of support holes are formed in the above-mentioned two-sided plates, and A bonding device in which a bearing member is disposed in the bearing hole and a guide support member is disposed in the support hole.

3. In Paragraph 2, Each of the pressure members disposed on the above jig is spaced apart from each of the plurality of bearing holes by a preset distance, and A bonding device in which the above-mentioned pressurizing member is capable of moving toward the cylindrical battery cell or moving away from the cylindrical battery cell.

4. In Paragraph 3, The above-mentioned pressure member is capable of rotating at a constant angle in the left and right directions, forming a bonding device.

5. In Paragraph 3, The above-mentioned pressure member is connected to a pressure support member, and The above-mentioned pressure support member is connected to a screw assembly, and The screw assembly comprises a screw member connected to the pressure support member and a nut member connected to the screw member. A bonding device in which, when the nut member rotates, the screw member moves linearly in the longitudinal direction of the screw member.

6. In Paragraph 5, The above nut member is connected to the shaft member, and The screw member is positioned in the through hole of the nut member and the center hole of the shaft member, and One side of the above shaft member is positioned in the through hole of the bearing member, and A bonding device in which the nut member rotates when the shaft member rotates.

7. In Paragraph 6, Each of the above plurality of driving units includes a first motor and a socket member connected to the rotation axis of the first motor, and Each of the above plurality of driving units is positioned on a support, and when it moves on the support and approaches the shaft member, the socket member is coupled with the other side of the shaft member. A bonding device in which the socket member and the shaft member rotate when the first motor is driven while the socket member is coupled with the shaft member.

8. In Paragraph 7, A bonding device in which, when the socket member rotates in one rotational direction by driving the first motor, the shaft member and the nut member rotate in one rotational direction, the screw member connected to the nut member and the pressure support member connected to the screw member move toward the cylindrical battery cell, and the pressure member connected to the pressure support member presses the outer surface of the cylindrical battery cell.

9. In Paragraph 7, A linear movement guide is disposed between each of the plurality of driving units and the support, and A bonding device in which each of the above plurality of driving units moves linearly by driving the piston of a cylinder device or the second motor of a motor device.

10. In Paragraph 5, The above guide support member is connected to the guide member, and A bonding device in which one end of the guide member is connected to the pressure support member, and the other end of the guide member is connected to the guide support member.

11. In Paragraph 1, One or more position sensor units are disposed on the above jig, and A bonding device in which the position sensor unit measures the positions of a plurality of cylindrical battery cells placed on the jig.

12. In Paragraph 11, The position data of multiple cylindrical battery cells measured by the above position sensor unit is transmitted to the control unit, and A bonding device in which the control unit analyzes the position data and drives a driving unit connected to a cylindrical battery cell that is not located at a preset point among the cylindrical battery cells, so that the cylindrical battery cell is located at a preset point.

13. In Paragraph 1, A pressure sensor is disposed on one side of the above-mentioned pressurizing member, and A bonding device in which the pressure sensor portion measures the pressure applied by the pressurizing member to the outer surface of the cylindrical battery cell.

14. In Paragraph 13, Pressure data of multiple cylindrical battery cells measured by the above pressure sensor unit is transmitted to the control unit, and The above control unit controls the pressure applied by the pressurizing member to the plurality of cylindrical battery cells using the pressure data, and A bonding device in which the above-mentioned pressure is controlled by the control unit adjusting the torque of the first motor of the drive unit.

15. A bonding method for combining the plurality of cylindrical battery cells and the cooling tube in the cell group of claim 1, A pressurization preparation step in which the jig of claim 1 moves to a section where a plurality of driving units of claim 1 are arranged, the plurality of driving units move to the moved jig and are connected to the jig, and the plurality of cylindrical battery cells and the cooling pipe are seated on the moved jig to form the structure of the cell group; A first pressurization step in which a plurality of driving units operate to pressurize all of the plurality of cylindrical battery cells placed on the jig; A first position measurement step, wherein, after the first pressurization step, the positions of the plurality of cylindrical battery cells are measured, and the position data of the plurality of cylindrical battery cells is analyzed to calculate the position of a cylindrical battery cell (target cell) that is not located at a preset point; A second pressurization step in which a driving unit (target driving unit) connected to the above target cell operates to pressurize the above target cell; A second position measurement step, wherein the positions of the plurality of cylindrical battery cells are measured after the second pressurization step, and the position of a target cell is calculated by analyzing the position data of the plurality of cylindrical battery cells; and A bonding method comprising a pressurization completion step, wherein after a second position measurement step, when the plurality of cylindrical battery cells and the cooling tube are placed at a preset position, the plurality of driving units are separated from the jig, and the jig moves away from the point where the plurality of driving units are placed.

16. In Paragraph 15, A bonding method that repeats the secondary pressurization step and the secondary position measurement step until the plurality of cylindrical battery cells and the cooling tube are placed at a preset position.

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