Battery cell stacking system

Abstract

Provided is a battery cell stacking system comprising: a stacking worktable in which a cell stack including one or more battery cells is manufactured; and a stacking device for stacking the one or more battery cells on the stacking worktable. The stacking device is configured to perform: a first operation of rotating around a rotation shaft connected to the stacking device in a state in which the one or more battery cells are seated; and a second operation of moving toward the stacking worktable to supply the one or more battery cells to the stacking worktable.

Description

Battery cell stacking system

[0001] The present invention relates to a battery cell stacking system.

[0002] Unlike primary batteries, secondary batteries can be recharged and discharged, making them suitable for a wide range of applications, including digital cameras, mobile phones, laptops, hybrid vehicles, and electric vehicles. Secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-hydrogen batteries, with lithium-ion batteries becoming increasingly popular.

[0003] As large-capacity and high-output power are required in electric vehicles and power storage devices, large-capacity battery devices such as battery modules or battery packs that house a cell stack in which a number of secondary batteries (battery cells) are stacked inside a housing are widely utilized.

[0004] A conventional battery cell stacking device includes a stacking worktable on which battery cells are stacked, and a fork mechanism for transporting the battery cells to the stacking worktable to produce a cell stack. For example, Fig. 1 illustrates an example of a conventional battery cell stacking device.

[0005] The conventional cell stacking method using a battery cell stacking device sequentially proceeds by placing a battery cell on a fork mechanism (VF), then transporting the battery cell (BC) using the fork mechanism (VF), and stacking the battery cell (BC).

[0006] The fork mechanism (VF) is a battery cell transport mechanism having a cell mounting portion (VFa) having a V-shaped cross-sectional structure, and is configured to transport battery cells (BC) fitted in the cell mounting portion (VFa) to a lamination worktable. After transport, the fork mechanism (VF) adds the battery cells (BC) located in the cell mounting portion (VFa) to a cell stack being laminated and assembled on the lamination worktable.

[0007] In the process of transporting and stacking battery cells (BC) using such a fork mechanism (VF), a problem has occurred in which the battery cells (BC) are damaged by being hit by the fork mechanism. For example, referring to Fig. 1, if the battery cell (BC) is mounted on the fork mechanism (VF) while the relative position between the fork mechanism (VF) and the battery cell (BC) is off from the standard position, there is a concern that the battery cell (BC) may be hit by the sharp edge (VFb) of the cell mounting portion (VFa). In particular, in the case of a pouch-type battery cell in which the electrode assembly is housed inside a thin aluminum pouch, there was a problem in which the outer shape of the pouch was deformed or the pouch was damaged by being hit by the edge (VFb) of the cell mounting portion (VFa).

[0008] In addition, since the fork mechanism (VF) of the conventional battery cell stacking device does not have a configuration capable of fixing the battery cell (BC) to the cell mounting portion (VFa), there was a concern that the position of the battery cell (BC) mounted on the cell mounting portion (VFa) would change due to vibration or inertia generated during the movement of the fork mechanism (VF). In addition, if the position of the battery cell (BC) inside the fork mechanism (VF) could not be maintained constant in this way, there was a concern that the alignment of the battery cells (BC) in the cell stack manufactured by the battery cell stacking device would go beyond the design specification range.

[0009] The present invention has been devised to solve at least some of the problems of the above-mentioned prior art, and provides a battery cell stacking system capable of quickly and accurately forming a cell stack without damaging the battery cells.

[0010] In order to achieve the above object, in embodiments of the present invention, a battery cell stacking system is provided, including a stacking workbench for manufacturing a cell stack including one or more battery cells; and a stacking device for stacking one or more battery cells on the stacking workbench, wherein the stacking device is configured to perform a first operation of rotating around a rotational axis connected to the stacking device while one or more battery cells are seated thereon; and a second operation of moving in a direction toward the stacking workbench and supplying one or more battery cells to the stacking workbench.

[0011] In embodiments, the battery cell stacking system further includes a supply device for supplying one or more battery cells to the stacking device, wherein the stacking device can be configured to reciprocate between the supply device and the stacking worktable.

[0012] In embodiments, the supply device supplies one or more battery cells to the stacking device in a horizontal state, and the stacking device can change one or more battery cells to a vertical state through the first operation and supply them to the stacking workbench.

[0013] In embodiments, at least one of the supply device and the stacking worktable may have a conveyor belt structure.

[0014] In embodiments, the stacking device includes a mounting portion on which one or more battery cells are mounted, and the mounting portion can be configured to support different sides of one or more battery cells simultaneously.

[0015] In embodiments, the stacking device may further include an adsorption portion for vacuum-adsorbing one or more battery cells mounted on the mounting portion.

[0016] In embodiments, the mounting portions in the stacking device may be provided in multiple numbers and arranged along a circumferential direction centered on the rotation axis.

[0017] In embodiments, the mounting portion may include a first mounting portion supporting a first side of one or more battery cells; and a second mounting portion adjacent to the first side of one or more battery cells and supporting a second side that is narrower than the first side.

[0018] In embodiments, the stacking workbench may include a guide portion that receives one or more battery cells from the stacking device.

[0019] In embodiments, a position sensor may further be included to detect the relative height of the upper surface of the second mounting portion and the guide portion.

[0020] In embodiments, at least one of the second mounting portion and the guide portion may be moved based on position information of the second mounting portion and the guide portion detected by the position sensor to reduce the step between the second mounting portion and the guide portion.

[0021] In embodiments, the battery cell stacking system may further include a vision camera that photographs one or more battery cells mounted on the mounting portion to detect a position of the one or more battery cells.

[0022] In embodiments, the stacking device may be configured to perform a third operation of moving along the longitudinal direction of the rotational axis based on positional information of one or more battery cells captured by the vision camera.

[0023] In embodiments, a plurality of stacking devices may be provided along the rotation axis.

[0024] In embodiments, the battery cell stacking system further includes a supply device that supplies one or more battery cells to the stacking device in a first direction, and the stacking device can stack the supplied one or more battery cells on the stacking worktable in a second direction crossing the first direction.

[0025] In embodiments, the stacking device may be configured to rotate 90 degrees or 180 degrees while one or more battery cells are seated.

[0026] In embodiments, a battery cell stacking system is provided, comprising: a stacking workbench for manufacturing a cell stack including one or more battery cells; and a stacking device for stacking one or more battery cells on the stacking workbench, wherein the stacking device is configured to perform a first operation of rotating about a rotational axis connected to the stacking device while having one or more battery cells secured thereon; a second operation of moving in a direction toward the stacking workbench and supplying one or more battery cells to the stacking workbench; and a third operation of moving in a direction parallel to the rotational axis and adjusting a position of one or more battery cells.

[0027] In embodiments, the stacking device further includes a vision camera that detects a position by photographing one or more battery cells mounted on the stacking device, and the stacking device can be configured to perform a third operation based on position information of the one or more battery cells photographed by the vision camera.

[0028] In embodiments, the invention may further include a guide portion disposed on a stacking workbench and receiving one or more battery cells from a stacking device; and a position sensor detecting a relative position of the guide portion and the stacking device.

[0029] According to the battery cell stacking system according to the embodiments, a cell stack can be manufactured quickly and safely without damaging the battery cells.

[0030] In addition, since the battery cell stacking system according to the embodiments can stack battery cells while aligning them in precise positions, a cell stack body without misalignment of battery cells can be manufactured.

[0031] Fig. 1 illustrates an example of a conventional battery cell stacking device.

[0032] FIG. 2 illustrates an exemplary configuration of a cell stack manufactured by a battery cell stacking system according to embodiments.

[0033] Figure 3 illustrates a battery cell stacking system according to embodiments.

[0034] Fig. 4 is an example of a stacking device included in a battery cell stacking system.

[0035] Figures 5 to 7 are reference drawings for explaining a battery cell stacking method using a battery cell stacking system.

[0036] Figure 8 is a reference diagram for explaining how to detect whether a step occurs between a stacking device and a stacking worktable.

[0037] Figure 9 shows an example of a displacement sensor included in a battery stacking system.

[0038] Figure 10 is a reference diagram for explaining the process of aligning the positions of battery cells by a battery cell stacking system.

[0039] Fig. 11 illustrates an exemplary configuration of a battery cell stacking system according to another embodiment.

[0040] Fig. 12 shows a battery cell stacking system according to another embodiment.

[0041] Before going into the detailed description of the present invention, it should be noted that the terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain his own invention in the best way. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of this application.

[0042] The same reference numbers or symbols used in each drawing attached to this specification represent parts or components that perform substantially the same functions. For convenience of explanation and understanding, the same reference numbers or symbols may be used in different embodiments. In other words, even if components with the same reference numbers are depicted in multiple drawings, they do not necessarily represent a single embodiment.

[0043] In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "comprises" or "comprises" should be understood to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0044] In addition, in the description below, expressions such as top, upper, lower, lower, side, front, and rear are expressed based on the direction shown in the drawing, and it is noted in advance that they may be expressed differently if the direction of the object in question changes.

[0045] Additionally, terms including ordinal numbers, such as "first," "second," etc., may be used in this specification and claims to distinguish between components. These ordinal numbers are used to distinguish identical or similar components from each other, and the use of these ordinal numbers should not be interpreted in a limited manner. For example, components associated with these ordinals should not be interpreted in a restricted manner, such as in the order of use or arrangement, based on their numbers. If necessary, each ordinal number may be used interchangeably.

[0046] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. However, the spirit of the present invention is not limited to the presented embodiments. For example, those skilled in the art who understand the spirit of the present invention may propose other embodiments within the spirit of the present invention by adding, modifying, or deleting components, etc., but such embodiments will also be considered to be within the spirit of the present invention. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0047] FIG. 2 illustrates an exemplary configuration of a cell stack (ST) manufactured by a battery cell stacking system (e.g., CS of FIG. 3) according to embodiments.

[0048] The battery cell stacking system (CS) according to the embodiments can stack and assemble a plurality of battery cells (10) in one direction. In the following description, the direction in which the battery cells (10) are stacked is referred to as the 'stacking direction'. For example, in the case of the battery cells (10) illustrated in FIG. 2, the stacking direction of the battery cells (10) may correspond to the X-axis direction.

[0049] Battery cells (10) stacked and arranged by a battery cell stacking system (CS) can be fixed to each other by an adhesive member (not shown) placed between the battery cells (10) to maintain a stacked state. The adhesive member (not shown) may be an adhesive or an adhesive tape, but is not limited thereto, and may be composed of any material that can fix the battery cells (10) to each other.

[0050] The battery cell (10) used in the battery cell stacking system (CS) may be a pouch type secondary battery having a structure in which an electrode assembly is housed inside a flexible pouch.

[0051] Referring to FIG. 2, the battery cell (10) may include an electrode assembly and an electrode receiving portion (11) in which an electrolyte is received, a metallic lead tab (13a, 13b) electrically connected to the electrode assembly and exposed to the outside of the outer material, and a sealing portion formed by bonding the outer material at at least one edge of the electrode receiving portion (11).

[0052] The electrode assembly may have a form in which a plurality of positive and negative electrode plates are laminated with a separator therebetween. The battery cell (10) may have a plurality of lead tabs (13a, 13b) including a first lead tab (13a) and a second lead tab (13b), wherein the first lead tab (13a) may be electrically connected to the negative electrode plate, and the second lead tab (13b) may be electrically connected to the positive electrode plate. The lead tabs (13a, 13b) may be exposed to the outside of the outer material.

[0053] The electrode receiving portion (11) may be formed by forming one or more outer layers. For example, one or two receiving portions may be formed on one outer layer, and then the outer layer may be folded so that the receiving portions form a single space, thereby forming the electrode receiving portion (11). The outer layer may be formed of a material capable of protecting the electrode assembly from the external environment, and may be composed of, for example, a flexible aluminum laminated film.

[0054] The surface of the electrode receiving portion (11) may be formed of a first surface (11a) having a relatively large area along its periphery and a second surface (11b) connected to the first surface (11a) and having a narrower area than the first surface (11a). For example, the electrode receiving portion (11) may be formed of a pair of first surfaces (11a) and a pair of second surfaces (11b) connected to the pair of first surfaces (11a). Through the battery cell stacking system (CS) according to the embodiments, the battery cells (10) may be stacked and arranged such that the first surfaces (11a) are in close contact with the first surfaces (11a) of other battery cells (10).

[0055] A terrace portion (12) may be formed on both sides of the electrode receiving portion (11). For example, referring to FIG. 2, the terrace portion (12) may refer to an area from the edge of the electrode receiving portion (11) to before the lead tabs (13a, 13b) in the battery cell (10). The terrace portion (12) is a portion formed by mutually contacting the outer materials at the edge of the electrode assembly received in the electrode receiving portion (11), and may be formed at both ends in the longitudinal direction (e.g., Y-axis direction) of the battery cell (10).

[0056] However, the battery cell (10) and cell stack (ST) illustrated in FIG. 2 are merely examples of battery cells (10) applied to the battery cell stacking system (CS) according to embodiments, and the battery cell (10) may be configured in various types other than the pouch-type battery cell (10) described above. For example, the battery cell (10) may be a square battery cell having a structure in which an electrode assembly is housed inside a metal case.

[0057] Hereinafter, a battery cell stacking system (CS) according to embodiments will be described with reference to FIGS. 3 and 4.

[0058] Figure 3 shows a battery cell stacking system (CS) according to embodiments.

[0059] FIG. 4 is an example of a stacking device (200) included in a battery cell stacking system (CS).

[0060] The battery cell (10) applied to the battery cell stacking system (CS) described in FIGS. 3 and 4 and the cell stack (ST) manufactured by the battery cell stacking system (CS) correspond to the battery cell (10) and the cell stack (ST) described in FIG. 2, so redundant descriptions may be omitted.

[0061] In embodiments, a battery cell stacking system (CS) may include a supply device (100) to which battery cells (10) are supplied, a stacking worktable (400) on which battery cells (10) are stacked, and a stacking device (200) for transporting and stacking battery cells (10) between the supply device (100) and the stacking worktable (400).

[0062] The supply device (100) may be configured to supply the battery cell (10) in a direction approaching the stacking device (200) while the stacking device (200) is positioned on one side of the supply device (100). For example, the supply device (100) may include a conveyor belt, and the battery cell (10) may be placed on the conveyor belt of the supply device (100) in a horizontal state and supplied to the stacking device (200) positioned on one side of the supply device (100). Here, the 'horizontal state' may mean a state in which the first surface (11a) of the electrode receiving portion (11) of the battery cell (10) is placed or in close contact with the upper surface of the supply device (100). If the upper surface of the supply device (100) is parallel to the horizontal plane, the 'horizontal state' of the battery cell (10) may mean a state in which the first surface (11a) of the electrode receiving portion (11) is parallel to the horizontal plane. For example, referring to FIG. 3, the battery cell (10) can be transported along the upper surface of the supply device (100) in a horizontal state and supplied to the stacking device (200).

[0063] The stacking device (200) can be configured to transport the battery cells (10) supplied from the supply device (100) to the stacking worktable (400) and stack the battery cells (10) on the stacking worktable (400). To this end, the stacking device (200) can be configured to perform a first operation (see FIG. 5) of rotating the battery cells (10) around a rotational axis (300) connected to the stacking device (200) while the battery cells (10) are secured thereon, and a second operation (see FIG. 6) of transporting the battery cells (10) in a direction toward the stacking worktable (400) to supply the battery cells (10) to the stacking worktable (400). Hereinafter, the structure and operation of the stacking device (200) will be described in more detail.

[0064] Referring to FIG. 3, the stacking device (200) may have one or more mounting portions (210) on which battery cells (10) are mounted.

[0065] A single mounting portion (210) may be configured to support and mount different sides of a battery cell (10), i.e., multiple sides. For example, referring to FIG. 3, a single mounting portion (210) may include a first mounting portion (211) on which a first side (11a) of a battery cell (10) is mounted, and a second mounting portion (212) on which a second side (11b) of the battery cell (10) is mounted. The angle between the first mounting portion (211) and the second mounting portion (212) may be approximately vertical.

[0066] In the battery cell (10), the first side (11a) may be wider than the second side (11b), and correspondingly, the area of ​​the first mounting portion (211) of the stacking device (200) may be wider than the area of ​​the second mounting portion (212).

[0067] The battery cell (10) transferred from the supply device (100) toward the stacking device (200) can be horizontally mounted on the mounting portion (210) of the stacking device (200). For example, the battery cell (10) transferred horizontally from the supply device (100) can be mounted on the stacking device (200) with the first side (11a) in contact with the first mounting portion (211) of the stacking device (200) and the second side (11b) in contact with the second mounting portion (212) of the stacking device (200).

[0068] The stacking device (200) is connected to a rotational shaft (300) and can rotate as the rotational shaft (300) rotates. For example, the rotational shaft (300) is connected to a motor that can control the rotational speed and rotational direction, and can rotate according to the user's control. For example, referring to FIG. 3, the stacking device (200) can rotate clockwise or counterclockwise around the rotational shaft (300) in a state where a battery cell (10) supplied from a supply device (100) is mounted on a mounting portion (210).

[0069] By this rotational drive, the stacking device (200) can supply the battery cell (10) supplied in a horizontal state to the stacking worktable (400) in a vertical state. Here, the 'vertical state' may mean a state in which the second surface (11b) of the electrode receiving portion (11) of the battery cell (10) is perpendicular to the vertical direction (i.e., parallel to the horizontal plane).

[0070] The stacking device (200) may have a structure in which a plurality of mounting portions (210) on which battery cells (10) are mounted are arranged along a circumferential direction centered on a rotation axis (300). Accordingly, the stacking device (200) may be moved to a stacking worktable (400) with two or more battery cells (10) mounted on different mounting portions, respectively.

[0071] In order to more stably transport and stack battery cells (10), a plurality of stacking devices (200) may be arranged on one rotation axis (300) in the battery cell stacking system (CS) according to the embodiments. For example, referring to FIG. 4, two or more stacking devices (200) may be arranged on one rotation axis (300) and spaced apart from each other along the longitudinal direction of the rotation axis (300) (e.g., the Y-axis direction of FIG. 3). Here, the longitudinal direction of the rotation axis (300) may be parallel to the longitudinal direction of the battery cells (10) supplied to the stacking device (200). The plurality of stacking devices (200) support different parts of the battery cells (10), thereby stably transporting and stacking the battery cells (10).

[0072] However, the structure or shape of the stacking device (200) of the battery cell stacking system (CS) according to the embodiments is not limited to that illustrated in FIG. 4. For example, the stacking device (200) of the battery cell stacking system (CS) may be arranged in one or three or more configurations on the rotation axis.

[0073] An adsorption portion (213) configured to adsorb the first surface (11a) or the second surface (11b) of the battery cell (10) may be disposed on the mounting portion (210) of the stacking device (200). For example, the adsorption portion (213) may be disposed on at least one of the first mounting portion (211) or the second mounting portion (212) to adsorb at least one of the first surface (11a) or the second surface (11b).

[0074] The suction part (213) has a hole structure formed on the surface of the mounting part (210) where the battery cell (10) is mounted, and can be configured to suck air into the hole. That is, when the battery cell (10) is mounted on the mounting part (210), the suction part (213) can suck air and tightly fix the battery cell (10) to the mounting part (210). The battery cell (10) is absorbed by the suction part (213), and can be stably maintained in the mounting state after being mounted on the mounting part (210).

[0075] After the battery cell (10) is moved to the stacking worktable (400), the suction operation of the suction part (213) is stopped, and thus the battery cell (10) can be easily separated from the mounting part (210).

[0076] The battery cell stacking system (CS) may further include one or more vision cameras (500) capable of detecting the positions of battery cells (10) mounted on the stacking device (200) and a first control unit (not shown) that controls the stacking device (200) based on position information of the battery cells (10) collected through the vision cameras (500). For example, referring to FIG. 3, the vision camera (500) may be positioned on the top of the stacking device (200) to obtain image information on the battery cells (10) mounted on the stacking device (200) and generate position information of the battery cells (10) based on the obtained image information (image data).

[0077] Based on the position information of the battery cell (10) acquired through the vision camera (500), the first control unit (not shown) can adjust the position of the battery cell (10) by moving the stacking device (200). For example, as the stacking device (200) moves in the longitudinal direction of the rotation axis (300) (e.g., the Y-axis direction of FIGS. 3 and 4), the battery cell (10) mounted on the stacking device (200) also moves in the longitudinal direction of the rotation axis (300), so that the position of the battery cell (10) can be adjusted to a preset fixed position. In this way, the movement of the stacking device (200) in the longitudinal direction of the rotation axis (300) is referred to as the third operation of the stacking device (200).

[0078] That is, the stacking device (200) according to the embodiments can be configured to perform a first operation of rotating around a rotational axis (300), a second operation of moving from a supply device (100) to a stacking worktable (400), and a third operation of moving in the longitudinal direction of the rotational axis (300).

[0079] The first operation, the second operation, and the third operation of the stacking device (200) can be performed independently. The first control unit (not shown) can independently control the first operation, the second operation, and the third operation of the stacking device (200). The order of performing the first operation, the second operation, and the third operation of the stacking device (200) is not particularly limited, and another operation (e.g., the third operation) may be performed while one operation (e.g., the first operation) is being performed.

[0080] Accordingly, the stacking device (200) can accurately adjust the position of the battery cell (10) to stack the battery cell (10) at an accurate position on the stacking worktable (400).

[0081] The stacking workbench (400) is a workbench where battery cells (10) are stacked and assembled. Battery cells (10) transported through the stacking device (200) can be stacked and assembled in one direction on the stacking workbench (400).

[0082] The stacking workbench (400) may further include a support (420) that supports one side of the cell stack (ST), and a guide part (410) that protrudes from the stacking workbench (400) in a direction toward the stacking device (200) and receives the battery cell (10) from the stacking device (200).

[0083] The support (420) of the stacking worktable (400) can support one side of the cell stack (ST) to prevent the cell stack (ST) from falling over or moving out of its original position. The support (420) can be configured to move in the stacking direction (e.g., the X-axis direction of FIG. 3) as the battery cells (10) continue to be stacked.

[0084] The guide portion (410) may have one or more suction portions (not shown) on its upper surface so that the battery cell (10) can be stably seated. In the following description, in order to distinguish it from the suction portion (213) of the stacking device (200), the suction portion (213) of the stacking device (200) is referred to as the first suction portion (213), and the suction portion of the guide portion (410) is referred to as the second suction portion.

[0085] The second suction part has a hole structure arranged on the upper surface of the guide part (410) and can be configured to suck in air. That is, when the battery cell (10) is seated on the guide part (410), the suction part (213) can suck in air and secure the battery cell (10) to the guide part (410).

[0086] The second adsorption portion can adsorb the second surface (11b) of the battery cell (10). Accordingly, the battery cell (10) converted to a vertical state in the stacking device (200) can be stably placed in a vertical state on the upper surface of the guide portion (410).

[0087] With the battery cell (10) seated on the upper surface of the guide portion (410), the stacking device (200) moves horizontally toward the stacking worktable (400) to press the battery cell (10) seated on the guide portion (410) against the cell stack (ST).

[0088] At least a portion of the stacking worktable (400) may have a conveyor belt structure, and as battery cells (10) are sequentially added to the cell stack (ST), the cell stack (ST) may be transported in one direction by a distance corresponding to the width of the battery cells (10) being added.

[0089] In the process in which the guide unit (410) receives the battery cell (10) from the stacking device (200), if there is a step, i.e., a height difference in the Z-axis direction, between the guide unit (410) and the stacking device (200), there is a risk that the battery cell (10) may be damaged or stamped. To prevent this, the battery cell stacking system (CS) may further include one or more displacement sensors (600) capable of detecting the relative positions, particularly the relative heights, of the stacking device (200) and the guide unit (410). Based on the sensing information (e.g., position information) of the stacking device (200) and the guide unit (410) detected by the displacement sensor (600), at least one of the stacking device (200) and the guide unit (410) may move to eliminate the step between the stacking device (200) and the guide unit (410).

[0090] Alternatively, the battery cell stacking system (CS) may be configured to stop the movement of the stacking device (200) and provide information (e.g., step occurrence notification information or location information, etc.) to the user when a step is detected between the guide unit (410) and the stacking device (200). Thereafter, the user may appropriately adjust the relative position or height of the stopped stacking device (200) with respect to the guide unit (410) to eliminate the step, and then operate the battery cell stacking system (CS) again to continue stacking the battery cells (10).

[0091] Hereinafter, the process of stacking battery cells (10) by the battery cell stacking system (CS) will be described in more detail with reference to FIG. 3 and FIG. 5 to FIG. 9.

[0092] Figures 5 to 7 are reference drawings for explaining a battery cell stacking method using a battery cell stacking system (CS).

[0093] FIG. 8 is a reference diagram for explaining a displacement sensor (600) that detects whether a step (d) occurs between a stacking device (200) and a stacking worktable (400).

[0094] FIG. 9 shows an example of a displacement sensor (600) included in a battery cell stacking system (CS).

[0095] The battery cell stacking system (CS) described in FIGS. 5 to 9 corresponds to the battery cell stacking system (CS) described previously through FIG. 3, so redundant descriptions may be omitted.

[0096] First, referring to FIGS. 3 and 5, in the supply step, the stacking device (200) is positioned on one side of the supply device (100), and the supply device (100) supplies the battery cell (10) to the stacking device (200). At this time, the battery cell (10) is placed horizontally on the supply device (100) and can be transported toward the stacking device (200) along the upper surface of the supply device (100).

[0097] In the settling step, the battery cell (10) supplied to the stacking device (200) is settling in the settling portion (210) of the stacking device (200). For example, the battery cell (10) may be settling in a state in which the electrode receiving portion (11) is in contact with the first settling portion (211) or the second settling portion (212) of the stacking device (200). In a state in which the battery cell (10) is settling, the first adsorption portion (213) of the settling portion (210) adsorbs the battery cell (10) and fixes the battery cell (10) so that it does not come off from the settling portion (210).

[0098] In the position alignment step, the vision camera (500) (e.g., the first sensor) can obtain sensing information about the battery cell (10) mounted on the mounting portion (210). For example, the vision camera (500) can obtain image information of the battery cell (10) mounted on the mounting portion (210) and generate position information of the battery cell (10) based on the image information. The stacking device (200) can perform a third operation of adjusting the position of the battery cell (10) based on the sensing information (e.g., position information). For example, when the center of the battery cell (10) is shifted to one side relative to the reference position according to the position information of the battery cell (10), the stacking device (200) can be driven to move to the opposite side of one side so that the center of the battery cell (10) is positioned at the reference position.

[0099] In the rotation step, the stacking device (200) can perform a first operation of rotating around the rotation axis (300) while the battery cell (10) is mounted thereon. Accordingly, the battery cell (10) mounted horizontally on the mounting portion (210) can rotate and move together with the stacking device (200) to be oriented in a vertical state. Since the first adsorption portion (213) adsorbs the battery cell (10) mounted on the mounting portion (210), the battery cell (10) can remain stably fixed to the stacking device (200) while the stacking device (200) rotates.

[0100] In embodiments, the mounting step and the rotation step may be alternately and repeatedly performed. For example, referring to FIGS. 3 and 5 together, after one battery cell (10) is mounted on a mounting portion (210) of the stacking device (200), the stacking device (200) may be rotated approximately 90 degrees, and then another battery cell (10) may be mounted on another mounting portion (210) of the stacking device (200). Accordingly, a plurality of battery cells (10) may be mounted on the stacking device (200) simultaneously.

[0101] In embodiments, a plurality of battery cells (10) may be mounted on the stacking device (200), and in this case, the supply device (100) may repeat the operation stopping and restarting from the supply stage to the rotation stage. For example, the supply device (100) operates a conveyor belt to supply battery cells (10) to the mounting portions (210) of the stacking device (200), and once the battery cells (10) are positioned on the mounting portions (210), the operation of the conveyor belt is stopped. Thereafter, when the stacking device (200) rotates and is ready to supply battery cells (10) to another empty mounting portion (210), the operation of the conveyor belt is restarted to supply battery cells (10) to the other mounting portions (210). After a plurality of battery cells (10) are sequentially supplied to each mounting portion (210) in this manner, the supply device (100) stops operating, the stacking device (200) adds the battery cells (10) to the cell stack (ST) on the upper surface of the stacking worktable (400), then returns to one side of the supply device (100), and then resumes operating to supply the battery cells (10) to the stacking device (200).

[0102] However, the settling step, position alignment step, and rotation step are not limited to the above-described steps. For example, the position alignment step and rotation step may be performed while only one battery cell (10) is settling on the mounting portion (210) through the settling step.

[0103] Referring to FIG. 6, in the transfer step, the stacking device (200) may perform a second operation of moving toward the stacking worktable (400) and transferring the battery cell (10) to the stacking worktable (400). At this time, the direction in which the stacking device (200) moves while performing the second operation may be a direction perpendicular to the longitudinal direction of the rotation axis (300).

[0104] The battery cell (10) transported by the stacking device (200) can be vertically placed on the guide portion (410) of the stacking worktable (400). The second suction portion arranged on the guide portion (410) can suction the battery cell (10) so that the battery cell (10) can be stably placed on the guide portion (410) in a vertical state.

[0105] Referring to FIGS. 6, 8 and 9 together, before the stacking device (200) supplies the battery cell to the guide portion (410) in the transfer step, the position sensor (e.g., second sensor) (600) detects the positions of the stacking device (200) and the guide portion (410), thereby confirming whether a step (d) is formed between the mounting portion (210) of the stacking device (200) and the upper surface (410a) of the guide portion (410).

[0106] If a vertical step (d) occurs between the second mounting portion (212) of the mounting portion (210) of the stacking device (200) and the upper surface (410a) of the guide portion (410), there is a risk that the battery cell (10) or the cell stack (ST) being manufactured will be hit by the edge of the guide portion (410) or the edge of the stacking device (200) during the process of transporting the battery cell (10) from the stacking device (200) to the guide portion (410), i.e., during the process of the stacking device (200) placing the battery cell (10) on the guide portion (410) or during the process of the stacking device (200) moving horizontally toward the stacking worktable (400).

[0107] To prevent this, the battery cell stacking system (CS) can adjust the relative positions of the stacking device (200) and the guide portion (410) using one or more displacement sensors (600) capable of detecting the relative positions of the stacking device (200) and the guide portion (410).

[0108] For example, referring to FIG. 8, a displacement sensor (600) may be installed at the bottom of a stacking worktable (400) and configured to detect the positions of the guide portion (410) and the stacking device (200). The battery cell stacking system (CS) may adjust the relative positions of the stacking device (200) and the guide portion (410) so that a step (d) does not occur between the second mounting portion (212) of the stacking device (200) and the upper surface (410a) of the guide portion (410) based on the sensing information of the guide portion (410) and the stacking device (200) detected by the displacement sensor (600).

[0109] Alternatively, the battery cell stacking system (CS) may be configured to stop the movement of the stacking device (200) and provide information thereon to the user when a step difference is detected between the guide unit (410) and the stacking device (200). Thereafter, the user may appropriately adjust the position or height of the stopped stacking device (200) to eliminate the step difference, and then operate the battery cell stacking system (CS) again to continue stacking the battery cells (10).

[0110] In embodiments, the battery cell stacking system (CS) may include one or more position sensors (600). For example, referring to FIG. 9, a plurality of position sensors (600) may be installed, each capable of detecting the position of the guide portion (410) and the stacking device (200). For example, a plurality of position sensors (600) may be installed on the lower surface of the work frame (700) on which the stacking worktable (400) is installed, and may detect the height level of the guide portion (410) and the mounting portion (210) of the stacking device (200), respectively.

[0111] The battery cell stacking system (CS) may further include a second control unit (not shown) that controls the relative positions of the stacking device (200) and the guide unit (410) based on position information detected by the position sensor (600). The second control unit (not shown) may be a separate configuration distinct from the first control unit (not shown). However, the first control unit (not shown) and the second control unit (not shown) may be integrated with each other to form a single unified control unit (not shown).

[0112] The second control unit (not shown) has position information (hereinafter referred to as reference position information) in which no step (d) occurs between the mounting portion (210) and the upper surface (410a) of the guide portion (410), and can determine whether a step (d) occurs by comparing the position information (hereinafter referred to as current position information) detected by the position sensor (600) with the reference position information.

[0113] When a step (d) occurs, the second control unit (not shown) can move the stacking device (200) or the guide unit (410) so that the current position information matches the reference position information. Through such feedback control, the stacking device (200) can secure the battery cell (10) on the upper surface (410a) of the guide unit (410) while the second mounting unit (212) and the upper surface (410a) of the guide unit (410) are located on the same plane, thereby preventing the battery cell (10) from being caught or damaged during the process of being transported from the stacking device (200) to the guide unit (410).

[0114] In this way, based on the position information derived by the position sensor (600), the relative positions of the stacking device (200) and the guide portion (410) are adjusted to eliminate the step (d). Accordingly, the battery cell (10) is safely seated on the guide portion (410) without a step (d) between the upper surface of the mounting portion (210) and the guide portion (410).

[0115] Referring to FIGS. 6 and 7 together, in the lamination step, the lamination device (200) continuously moves toward the lamination worktable (400) to press the battery cell (10) seated on the guide part (410) so that it adheres closely to the cell lamination body (ST) or the support (420). An adhesive member (not shown) may be placed on the first surface (11a) of the battery cell (10) facing the support (420), and thus the battery cell (10) may be laminated and fixed to the cell lamination body (ST) being assembled.

[0116] When the stacking device (200) transports a plurality of battery cells (10) together, the stacking device (200) can add the plurality of battery cells (10) mounted on each of the mounting portions (210) to the cell stack (ST) during the stacking step. For example, referring to FIGS. 6 and 7 together, the stacking device (200) can perform the stacking step in a state where two or more battery cells (10) are mounted, and after adding one battery cell (10) to the cell stack (ST), it can rotate again to add the battery cell (10) mounted on another mounting portion (210) to the cell stack (ST). In this way, by continuously stacking the battery cells (10) mounted on the plurality of mounting portions (210), the assembly speed for assembling the cell stack (ST) can be increased.

[0117] Meanwhile, the position alignment step may be performed separately in the mounting step, the rotation step, the transfer step, and the stacking step. For example, the vision camera (500) may collect image information of the mounted battery cell (10) in the mounting step, convert it into first position information, and store it. In the rotation step, the vision camera (500) may collect image information of the battery cell (10) mounted on another mounting portion (210), convert it into second position information, and store it. In the transfer step and the stacking step, the stacking device (200) may adjust the position of each battery cell (10) based on the stored first position information and second position information, and then mount the battery cell (10) on the guide portion (410).

[0118] In this way, the battery cell stacking system (CS) can manufacture a cell stack (ST) by stacking a plurality of battery cells (10) by performing a supply step, a settling step, a positioning step, a rotation step, a transfer step, and a stacking step.

[0119] Hereinafter, the position alignment step performed in the battery cell stacking system (CS) will be described in more detail with reference to FIG. 3 and FIG. 10 together.

[0120] Fig. 10 is a reference diagram for explaining the process of aligning the positions of battery cells (10) by a battery cell stacking system.

[0121] Since the battery cell stacking system described in Fig. 10 corresponds to the battery cell stacking system (CS) described in Fig. 3, redundant description may be omitted.

[0122] In the process of supplying battery cells (10) from a supply device (100) to a stacking device (200), there is a concern that the battery cells (10) may be supplied offset to one side from the original position, and if the battery cells (10) are stacked without position correction, a problem occurs in which the alignment of the cell stack (ST) is misaligned.

[0123] To prevent such problems, the battery cell stacking system (CS) according to the embodiments can identify the position information of the battery cell (10) through the vision camera (500) and move the stacking device (200) based on the position information to adjust the position of the battery cell (10).

[0124] Referring to FIGS. 3 and 10 together, in the battery cell stacking system (CS), a plurality of vision cameras (500) may be installed to photograph different parts of the battery cell (10) and process them into image information. For example, each vision camera (500) may photograph the terrace portions (12) on both sides of the battery cell (10) to determine the positions of the edges on both sides of the battery cell (10), and based on this, the coordinate values ​​of the center line (CL) of the battery cell (10) may be derived. Here, the center line (CL) may be a virtual line on a position that is the center of the battery cell (10) based on the longitudinal direction of the battery cell (10) (for example, the Y-axis direction of FIG. 3).

[0125] Referring to FIG. 10, the first control unit (not shown) compares the coordinate values ​​of the center line (CL) derived using the vision camera (500) with the coordinate values ​​of the center line when the battery cell (10) is positioned correctly (hereinafter, referred to as the reference position), and adjusts the position of the battery cell (10) so that the two coordinate values ​​match each other.

[0126] More specifically, the first control unit (not shown) has information about the reference position of the battery cell (10), that is, information about the reference center line (CLr) of the reference battery cell (10r), and compares the reference center line (CLr) with the center line (CL) of the battery cell (10) derived through the vision camera (500) to control the stacking device (200) so that the two center lines (CL, CLr) coincide with each other. For example, when the center line (CL) of the battery cell (10) is shifted to the left by a first distance relative to the reference center line (CLr), the stacking device (200) moves to the right by the first distance while supporting the battery cell (10). Accordingly, the battery cell (10) can be stacked and assembled with the center line (CL) positioned at the correct position.

[0127] If necessary, the battery cell stacking system (CS) may further include a marking member for marking the center line (CL) of the battery cell (10). For example, the marking member may mark at least a portion of the center line (CL) of the battery cell (10) along the center line (CL) of the battery cell (10) derived by the vision camera (500) with a laser so that the center line (CL) of the battery cell (10) can be recognized with the naked eye. Accordingly, a worker or user can quickly and intuitively check whether the battery cells (10) are not misaligned in the cell stack (ST).

[0128] Meanwhile, in a battery cell stacking system, the method of stacking battery cells can be set in various ways other than the method described above. Hereinafter, a battery cell stacking system according to another embodiment will be described with reference to FIGS. 11 and 12.

[0129] Fig. 11 shows an exemplary configuration of a battery cell stacking system (CS') according to another embodiment.

[0130] Fig. 12 shows a battery cell (10) being stacked in a battery cell stacking system (CS') according to another embodiment.

[0131] In another embodiment, the stacking device of the battery cell stacking system (CS') may be configured to stack battery cells supplied in a first direction along a second direction that is intersecting (e.g., perpendicular) to the first direction. For example, referring to FIGS. 11 and 12 , the supply device (100) supplies battery cells (10) to the stacking device (200) in a horizontal direction, and the stacking device (200) rotates while the battery cells (10) are placed thereon, and then transfers the battery cells to the stacking worktable (400') to stack the battery cells in a vertical direction. Here, the 'vertical direction' may mean a direction perpendicular to a horizontal plane, or a vertical direction in a work environment in which the battery cell stacking system (CS') is placed.

[0132] The supply device (100) that supplies the battery cell (10) to the stacking device (200) includes all the features of the supply device (100) described above through FIGS. 3 to 8, and a detailed description thereof can be obtained by referring to FIGS. 3 to 8.

[0133] In order to vertically stack battery cells (10) on the stacking workbench (400'), the stacking device (200) can rotate more than 90 degrees while the battery cells (10) are installed. For example, referring to FIGS. 11 and 12, the stacking workbench (400') can be placed below the supply device (100), and the stacking device (200) can rotate about 180 degrees after receiving the battery cells (10) from the supply device (100) to align the battery cells (10) so that they face the stacking workbench (400').

[0134] The stacking device (200) can adjust the longitudinal position of the battery cell (10) to correspond to the reference position based on the position information of the battery cell (10) collected through the vision camera (500) in the process of receiving the battery cell (10) and aligning it toward the stacking worktable (400'). The position alignment of the battery cell (10) through the vision camera (500) can be described with reference to the description of FIG. 10 above.

[0135] The stacking device (200) can move from the supply device (100) toward the stacking worktable (400') and stack battery cells (10) on the stacking worktable (400').

[0136] The stacking worktable (400') may be arranged to extend vertically upwards on the base portion (430). The stacking device (200) may stack battery cells (10) in a parallel direction on one side of the stacking worktable (400').

[0137] A support (420') for supporting the lower part of a cell stack (ST) being laminated and a guide part (410') for supporting a battery cell (10) transferred from a lamination device (200) can be placed on the lamination worktable (400').

[0138] The support (420') can support one side of the cell stack (ST). As battery cells (10) are added from the stacking device (200), the support (420') can be configured to move downward accordingly. For example, the stacking worktable (400') can be configured as a conveyor belt type that can move the cell stack (ST) and the support (420'), and the support (420') can move downward along the stacking worktable (400') together with the cell stack (ST) as battery cells (10) are added to the cell stack (ST).

[0139] The stacking workbench (400') can guide the battery cells (10) to be stacked in an accurate position through the guide part (410'). If necessary, the guide part (410') can be provided with an adsorption part (not shown) that can support the battery cells (10) by adsorbing the surface of the battery cells (10).

[0140] If there is a step (d) between the guide part (410') and the stacking device (200), there is a risk that the battery cell (10) may be damaged or stamped. To prevent this, the battery cell stacking system (CS') may further include one or more position sensors (600) capable of detecting the relative positions of the stacking device (200) and the guide part (410'). For example, referring to FIG. 12, before the stacking device (200) supplies the battery cell to the guide part (410') in the transport step, the position sensor (600) detects the positions of the stacking device (200) and the guide part (410'), thereby determining whether a step (d) is formed between the mounting part (210') of the stacking device (200) and the upper surface (410a') of the guide part (410').

[0141] Based on the position information of the stacking device (200) and the guide part (410') detected by the position sensor (600), at least one of the stacking device (200) and the guide part (410') can move to eliminate the step (d) between the stacking device (200) and the guide part (410'). Alternatively, the battery cell stacking system (CS') can be set to stop the movement of the stacking device (200) and provide information thereon to the user when the step (d) is detected between the guide part (410') and the stacking device (200). Thereafter, the user can appropriately adjust the position of the stopped stacking device (200) to eliminate the step (d), and then operate the battery cell stacking system (CS') again to continue stacking the battery cells (10).

[0142] After the stacking of battery cells (10) is completed, it may be necessary to realign the position of the cell stack (ST) for subsequent processes, such as connecting the cell stack (ST) and the busbar assembly. To this end, the stacking work table (400') may be rotated relative to the base portion (430) to align the cell stack (ST) in a horizontal direction, thereby enabling subsequent processes to be performed efficiently.

[0143] In the embodiments, the specific shape of the stacking worktable (400') is not limited to that shown in the drawing, and any shape may be provided as long as it is a structure that can stably support the battery cells (10) so that they can be stacked in a vertical direction.

[0144] The battery cell stacking system (CS') can quickly stack battery cells (10) supplied in a first direction in a second direction intersecting the first direction by using a stacking device (200) capable of rotational driving. That is, without a separate pickup-type transfer member for picking up the supplied battery cells (10), the battery cells (10) are naturally placed on the rotating stacking device (200) during the process of being supplied, and then a cell stack (ST) can be quickly and efficiently manufactured through the rotation and elevation of the stacking device (200).

[0145] In this way, since the battery cell stacking system (CS') is configured to stack the battery cells (10) in a vertical direction, the stacking operation can be performed more efficiently by utilizing the load of the battery cells (10) in the production of the cell stack (ST). For example, as the battery cells (10) are gradually stacked in the vertical direction, the additional battery cells (10) pressurize the battery cells stacked below them, so that even if the pressing force applied by the stacking device (200) to the cell stack (ST) is not large, the battery cells (10) can be stably vertically stacked.

[0146] Meanwhile, in the battery cell stacking system (CS') described in FIGS. 11 and 12, the cell stack alignment effect increased by the vision camera (500) and the position sensor (600) can be referred to the descriptions of FIGS. 3 to 8 above.

[0147] According to the battery cell stacking system (CS) according to the embodiments, a simpler structure can be achieved by omitting components such as a conventional fork mechanism.

[0148] In addition, according to the battery cell stacking system (CS) according to the embodiments, parts having sharp edges, such as conventional fork mechanisms, are omitted, and a rotating stacking device (200) is employed in which battery cells (10) can be naturally settled and transported during the transport process, thereby safely manufacturing a cell stack (ST) without causing damage to the battery cells (10).

[0149] In addition, according to the battery cell stacking system (CS) according to the embodiments, the positions of the battery cells (10) can be precisely detected so that the battery cells (10) are stacked while being aligned at the correct positions, thereby manufacturing a cell stack (ST) without misalignment of the battery cells (10).

[0150] While various embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible without departing from the technical spirit of the present invention as set forth in the claims. Furthermore, the embodiments described above may be implemented by deleting some components, and the embodiments may be implemented in combination with each other.

[0151] [Explanation of symbols]

[0152] 10... Battery cell 11... Electrode receiving portion

[0153] 12... Terrace section 13a, 13b... Lead tab

[0154] 100... supply device 200... stacking device

[0155] 210... Mounting part 300... Rotating axis

[0156] 400... Stacking workbench 410... Guide section

[0157] 420... Support 500... Vision Camera

[0158] 600... Position Sensor ST... Cell Stack

[0159] CS... Battery cell stacking system CL... Centerline

Claims

1. A lamination workbench on which a cell laminate including one or more battery cells is manufactured; and A laminating device for laminating one or more battery cells on the laminating worktable, The above-mentioned stacking device A first operation of rotating the stacking device around a rotational axis connected to the stacking device while the one or more battery cells are mounted thereon; and A battery cell stacking system configured to perform a second operation of moving in a direction toward said stacking workbench and supplying said one or more battery cells to said stacking workbench.

2. In paragraph 1, Further comprising a supply device for supplying one or more battery cells to the stacking device, A battery cell stacking system wherein the stacking device is configured to reciprocate between the supply device and the stacking worktable.

3. In paragraph 2, The supply device supplies the one or more battery cells to the stacking device in a horizontal state, A battery cell stacking system in which the stacking device changes the one or more battery cells into a vertical state through the first operation and supplies them to the stacking workbench.

4. In paragraph 2, A battery cell stacking system wherein at least one of the supply device and the stacking worktable has a conveyor belt structure.

5. In paragraph 1, The stacking device includes a mounting portion on which one or more battery cells are mounted, A battery cell stacking system wherein the above-mentioned mounting member is configured to support different sides of one or more battery cells simultaneously.

6. In paragraph 5, A battery cell stacking system wherein the stacking device further includes an adsorption unit that vacuum-absorbs one or more battery cells mounted on the mounting unit.

7. In paragraph 5, A battery cell stacking system in which the mounting members are provided in multiple numbers in the above stacking device and arranged along a circumferential direction centered on the rotation axis.

8. In paragraph 5, The above anchorage A first mounting member supporting a first side of one or more battery cells; and A battery cell stacking system comprising a second mounting portion adjacent to the first surface of the at least one battery cell and supporting a second surface narrower than the first surface.

9. In paragraph 8, A battery cell stacking system, wherein the stacking worktable includes a guide section for receiving one or more battery cells from the stacking device.

10. In paragraph 9, A battery cell stacking system further comprising a displacement sensor that detects the relative height of the second mounting portion and the upper surface of the guide portion.

11. In Article 10, A battery cell stacking system that reduces the step between the second mounting portion and the guide portion by moving at least one of the second mounting portion and the guide portion based on relative position information of the upper surface of the second mounting portion and the guide portion detected by the displacement sensor.

12. In paragraph 5, A battery cell stacking system further comprising a vision camera for photographing the one or more battery cells mounted on the mounting portion to detect the position of the one or more battery cells.

13. In paragraph 12, The above-mentioned stacking device A battery cell stacking system configured to perform a third operation of moving along the longitudinal direction of the rotation axis based on positional information of the one or more battery cells captured by the vision camera.

14. In paragraph 1, A battery cell stacking system in which a plurality of stacking devices are provided along the rotation axis.

15. In paragraph 1, The stacking device further includes a supply device for supplying the one or more battery cells in a first direction, The above-mentioned stacking device is a battery cell stacking system that stacks the supplied one or more battery cells on the stacking workbench in a second direction crossing the first direction.

16. In paragraph 1, A battery cell stacking system, wherein the stacking device is configured to rotate 90 degrees or 180 degrees while the one or more battery cells are seated.

17. A lamination workbench on which a cell laminate including one or more battery cells is manufactured; and A laminating device for laminating one or more battery cells on the laminating worktable, The above-mentioned stacking device A first operation of rotating the stacking device around a rotational axis connected to the stacking device while the one or more battery cells are mounted thereon; A second operation of moving in a direction toward the stacking workbench and supplying the one or more battery cells to the stacking workbench; and A battery cell stacking system configured to perform a third operation of adjusting a position of one or more battery cells by moving in a direction parallel to the rotational axis.

18. In paragraph 17, Further comprising a vision camera for photographing and detecting the position of one or more battery cells mounted on the stacking device; The above-mentioned stacking device A battery cell stacking system configured to perform the third operation based on positional information of the one or more battery cells captured by the vision camera.

19. In paragraph 17, A guide part arranged on the stacking workbench and receiving one or more battery cells from the stacking device; and A battery cell stacking system further comprising a position sensor for detecting the relative position of the guide portion and the stacking device.

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