Stacking apparatus

Abstract

An embodiment discloses a stacking device comprising: a stacking module including a main stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the main stage; an anode plate supply module for supplying the anode plate; and a cathode plate supply module for supplying the cathode plate, wherein the stacking module includes at least one support unit for supporting the anode plate, the cathode plate, and the separator stacked on the main stage, and the at least one support unit includes a support pin, a first support driving unit for moving the support pin in a horizontal direction, and a second support driving unit for moving the support pin in a vertical direction, wherein the first support driving unit and the second support driving unit are driven independently.

Description

Technology Field

[0001] The embodiment relates to a stack device for fabricating an electrode assembly. Background Technology

[0002] Recently, secondary batteries are being applied to various technological fields across industries, and are also attracting attention as an energy source for hybrid electric vehicles, which are being proposed as a solution to address air pollution caused by existing gasoline and diesel internal combustion engines.

[0003] Secondary batteries are manufactured by stacking a positive plate, a separator, and a negative plate using a stacking device. However, conventional stacking devices have many problems as described below.

[0004] In the case of conventional stacking devices, since the stage moves left and right to alternately stack positive and negative plates, space is required for the stage to move left and right, which leads to a problem of the device size increasing.

[0005] In addition, when picking up electrode plates, there is a possibility that two electrode plates may stick together due to static electricity, which could lead to defects in the process and product.

[0006] In addition, there is a problem in maintaining the tension of the separator during the process of stacking the positive plate, separator, and negative plate by the stacking device.

[0007] In addition, since the mandrel that pressurizes and supports the electrode plate moves in a fixed sequence during vertical and horizontal driving, there is a problem in that it takes a long time to fix and release the electrode plate.

[0008] In addition, since the supply of positive and negative plates is carried out by a single supply unit, the supply speed is slow, and there is a problem that the entire equipment must be stopped if a defect occurs in the electrode supply unit.

[0009] In addition, there is a problem where the battery becomes tightly adhered to the pressurization module during the process of applying high pressure after manufacturing, making it difficult to detach.

[0010] In addition, due to the structure of the stacking equipment, it is difficult to measure the alignment of the stacked electrode plates from the top, which presents a problem in that it is difficult to precisely detect stacking defects of the electrode plates.

[0011] In addition, there is no device to automatically wind the separator remaining on the electrode assembly discharged after the stack is completed, so the finishing is done manually, which causes a problem of slow work speed. The problem to be solved

[0012] An embodiment provides a stacking device in which the stage is fixed and the stacking head rotates left and right.

[0013] An embodiment provides a stack device equipped with a pickup unit that removes a lower electrode plate when two electrode plates are picked up during electrode plate pickup.

[0014] The embodiment provides a stacking device capable of adjusting the length and tension of the separator when the stacking head rotates.

[0015] An embodiment provides a stack device having a plurality of support units in which vertical drive and horizontal drive are controlled independently.

[0016] An embodiment provides a stack device equipped with a sensor that detects when two electrode plates are picked up when picking up electrode plates.

[0017] An embodiment provides a stack device equipped with a plurality of positive plate supply units and a plurality of negative plate supply units.

[0018] An embodiment provides a stack device comprising a pressure module in which the contact area is adjusted after pressure is applied to an electrode assembly.

[0019] An embodiment provides a stack device that captures an image of the upper surface of an electrode assembly through a mirror.

[0020] An embodiment provides a stack device that wraps and secures a cut separator around an electrode assembly.

[0021] The problems intended to be solved in the embodiments are not limited thereto, and may also include objectives or effects that can be identified from the means of solving the problems or the forms of implementation described below. means of solving the problem

[0022] A stack device according to the first feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; and a cathode plate supply module for providing the cathode plate, wherein the stacking head rotates in a first rotational direction to pick up an anode plate provided by the anode plate supply module and rotates in a second rotational direction different from the first rotational direction to pick up a cathode plate supplied by the cathode plate supply module.

[0023] A stack device according to the second feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; and a cathode plate supply module for providing the cathode plate, wherein the anode plate supply module comprises a first storage unit in which a plurality of anode plates are stored; and a first pickup unit for picking up the anode plates stored in the first storage unit, wherein the first pickup unit comprises a plurality of first adsorption parts for adsorbing the anode plates, a body part for supporting the plurality of first adsorption parts, and a vibration part for shaking the picked-up anode plates.

[0024] A stack device according to the third feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; a cathode plate supply module for providing the cathode plate; a separator supply module for supplying a separator to the stacking head; and a tension control module disposed between the separator supply module and the stacking head for controlling the tension of the separator.

[0025] A stack device according to the fourth feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; and a cathode plate supply module for providing the cathode plate, wherein the stacking module comprises a plurality of support units for supporting the anode plate, the cathode plate, and the separator stacked on the stacking stage, and wherein the plurality of support units comprise a support pin, a first support driving unit for moving the support pin in a horizontal direction, and a second support driving unit for moving the support pin in a vertical direction, wherein the first support driving unit and the second support driving unit are driven independently.

[0026] A stack device according to the fifth feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; and a cathode plate supply module for providing the cathode plate, wherein the anode plate supply module comprises a first storage unit in which a plurality of anode plates are stored; and a first pickup unit for picking up the anode plates stored in the first storage unit, wherein the first pickup unit comprises a plurality of first adsorption parts for adsorbing the anode plates, a body part for supporting the plurality of first adsorption parts, and an eddy current sensor for detecting whether two of the picked-up anode plates are adsorbed.

[0027] A stack device according to the sixth feature of the present invention comprises: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for providing the anode plate; and a cathode plate supply module for providing the cathode plate, wherein the anode plate supply module comprises a plurality of first storage units, a plurality of first-1 pickup units for picking up an anode plate from each of the plurality of first storage units, and a first alignment stage for supplying an anode plate to the stacking head, and the cathode plate supply module comprises a plurality of second storage units, a plurality of second-1 pickup units for picking up a cathode plate from each of the plurality of second storage units, and a second alignment stage for supplying a cathode plate to the stacking head, wherein the anode plate picked up by the first-1 pickup unit and the anode plate picked up by the second-1 pickup unit are alternately placed on the first alignment stage. Effects of the invention

[0028] According to an embodiment, the size of the stacking device can be reduced by providing a stacking device in which the stage is fixed and the stacking head rotates left and right.

[0029] In addition, by providing a stack device equipped with a pickup unit that removes the lower electrode plate when two electrode plates are picked up during electrode plate pickup, the electrode plate attached to the lower part of the picked-up electrode plate can be removed, thereby preventing defects in the electrode assembly.

[0030] In addition, by providing a stacking device capable of adjusting the length and tension of the separator when the stacking head rotates, stacking defects of the separator can be prevented.

[0031] In addition, by providing a stack device equipped with multiple support units in which vertical and horizontal drives are controlled independently, the time for fixing and releasing the electrode plates of the support units is shortened, thereby reducing the TAC time.

[0032] In addition, by providing a stack device equipped with a sensor that detects when two electrode plates are picked up during electrode plate pickup, the early detection of two electrode plates being picked up can prevent defects in the electrode assembly.

[0033] In addition, by providing a stack device equipped with multiple positive plate supply units and multiple negative plate supply units, the operating speed is improved, and even if a failure occurs in some supply units, electrode plates are supplied from the remaining supply units, so repairs can be carried out without stopping the device.

[0034] In addition, by providing a stack device including a pressure module in which the contact area is adjusted after pressurizing the electrode assembly, it may be easy to separate the electrode assembly from the pressure module after pressurization.

[0035] In addition, stacking defects of the electrode assembly can be precisely detected by providing a stacking device that captures an image of the upper surface of the electrode assembly through a mirror.

[0036] In addition, by providing a stacking device that winds and secures the end of the cut separator to the electrode assembly, the end of the separator generated during the cutting process of the electrode assembly can be automatically wound and secured to the electrode assembly.

[0037] The various and beneficial advantages and effects of the present invention are not limited to those described above and may be more easily understood in the process of explaining specific embodiments of the present invention. Brief explanation of the drawing

[0038] FIG. 1 is a diagram schematically showing the workflow of a stack device according to one embodiment. FIGS. 2A and FIGS. 2B are drawings showing the sequence of transporting an anode plate and a cathode plate according to one embodiment. FIG. 3 is a diagram showing the sequence of transporting the positive plate and the negative plate according to another embodiment. FIG. 4 is a diagram showing the sequence of transporting the positive plate and the negative plate according to another embodiment. FIG. 5 is a drawing showing a stack device according to one embodiment. FIG. 6 is a drawing showing a first storage unit, a first transfer unit, and an anode plate inspection unit according to one embodiment. FIGS. 7a to 7e are drawings showing the process of transferring an anode plate stored in a first storage unit to an anode plate inspection unit. FIG. 8a is a drawing showing a first-1 pickup unit according to one embodiment. FIG. 8b is a diagram showing the process of removing two electrode plates attached by the 1-1 pickup unit. Figures 9a and 9b are drawings showing the process of a suction part placed in a sub-block rotating. FIG. 10 is a drawing showing a first-1 pickup unit according to another embodiment. FIGS. 11a and FIGS. 11b are drawings showing the process of the electrode plate being bent as the adsorption portion of the first-1 pickup unit is tilted. FIG. 12 is a drawing showing an inspection unit according to one embodiment. Figure 13 is an image of a positive plate placed on a first alignment stage. Figure 14 is an image of a cathode plate placed on a second alignment stage. FIGS. 15a to 15c are drawings showing the process of a positive plate, a negative plate, and a separator being stacked on a stacking stage by a stacking head. FIG. 16 is a drawing showing a stacking stage and a plurality of support units according to one embodiment. Figure 17 is a diagram showing the three-axis drive of the support unit. FIG. 18 is a drawing showing a state in which a plurality of support units press the electrode plate. FIG. 19 is a drawing showing a membrane supply module according to one embodiment. FIG. 20 is a drawing showing the state in which the tension of a separator is controlled by a separator supply module according to one embodiment. Figure 21 is a diagram showing the process of inspecting the alignment of electrode assemblies stacked on a stacking stage. FIG. 22 is a plan view showing the state in which the positive plate is adsorbed by the third pickup module. Figure 23 is a diagram showing the process of determining alignment status through a captured image of the positive plate. FIG. 24 is a drawing showing the state in which the pulling module of a stack device according to one embodiment approaches the electrode assembly. FIG. 25 is a perspective view showing a cutting module and a pulling module according to one embodiment. FIGS. 26a to 26e are drawings showing the state in which the pulling module has extracted the electrode assembly to the rear. FIG. 27 is a drawing showing the state in which an electrode assembly is moved to one side of a stack device by a pulling module according to one embodiment. FIG. 28 is a drawing showing a winding module according to one embodiment. Figure 29 is a drawing showing the state in which the guide bar is supported by the hook of the clamping unit. FIG. 30a is a drawing showing the state in which an electrode assembly is fitted onto a guide bar of a winding module. FIG. 30b is a drawing showing the state in which the separator of the electrode assembly is wound as the first rotating part and the second rotating part of the winding module rotate. FIG. 31 is a drawing showing a heating module of one embodiment. FIG. 32 is a drawing showing a pressurizing module of one embodiment. Figure 33 is a drawing showing a diaphragm placed on a lower pressure plate. Figure 34 is a drawing showing the state in which the diaphragm of the lower pressure plate expands and the electrode assembly and the lower pressure plate are separated. Figure 35 is a drawing showing the state in which a diaphragm is placed on the lower pressure plate and the upper pressure plate. Figure 36 is a drawing showing the state in which the diaphragm of the upper pressure plate expands and the electrode assembly and the upper pressure plate are separated. Figure 37 is a drawing showing the state in which the diaphragm of the lower pressure plate expands and the electrode assembly and the lower pressure plate are separated. Specific details for implementing the invention

[0039] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0040] Terms including ordinal numbers, such as second, first, etc., may be used to describe various components, but said components are not 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 second component may be named the first component, and similarly, the first component may be named the second component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0041] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0042] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0043] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0044] Hereinafter, embodiments will be described in detail with reference to the attached drawings, provided that identical or corresponding components are given the same reference number regardless of the drawing symbols, and redundant descriptions thereof will be omitted.

[0045] FIG. 1 is a diagram schematically showing the workflow of a stack device according to one embodiment.

[0046] Referring to FIG. 1, a stack device according to one embodiment of the present invention may include an anode plate supply module (100), a cathode plate supply module (200), a separator supply module (500), a stacking module (300) including a stacking stage (320) and a stacking head (310), a pulling module (600) for extracting a stacked electrode assembly (EA), a winding module (800) for finishing a separator (43) of an electrode assembly (EA), a heating module (20) for bonding an electrode assembly (EA), and a pressing module (30) for pressing an electrode assembly (EA).

[0047] The stack device according to the embodiment may include only some of the components mentioned above. For example, the stack device according to the embodiment may include an anode plate supply module (100), a cathode plate supply module (200), a separator supply module (500), a stacking stage (320), and a stacking head (310).

[0048] Alternatively, the stack device according to the embodiment may include an anode plate supply module (100), a cathode plate supply module (200), a separator supply module (500), a stacking stage (320), a stacking head (310), a pulling module (600), and a winding module (800). That is, the stack device according to the embodiment may be defined as a device comprising at least one of the aforementioned components.

[0049] The positive plate supply module (100) can perform the role of supplying a plurality of positive plates (41) stored in the first storage unit (magazine, 110) so that the stacking head (310) can pick them up in sequence.

[0050] The positive plate (41) stored in the first storage unit (110) can be moved to the first transfer unit (120) adjacently positioned in the first direction (X-axis direction). Afterward, the positive plate (41) can be placed on the first alignment stage (130) by the first transfer unit (120).

[0051] The positive plate supply module (100) is configured with at least one pickup unit to move the positive plate (41) stored in the first storage unit (110) from the first storage unit (110) to the first transfer unit (120) (S11), and then move it from the first transfer unit (120) to the first alignment stage (130) (S12).

[0052] For example, the positive plate supply module (100) may include a first-1 pickup unit (140) that moves a positive plate (41) stored in a first storage unit (110) to a first transfer unit (120), and a first-2 pickup unit (150) that moves a positive plate (41) from the first transfer unit (120) to a first alignment stage (130). However, it is not necessarily limited to this, and a single pickup unit may move the positive plate (41).

[0053] The positive plate supply module (100) may include a first positive plate supply unit and a second positive plate supply unit spaced apart in a second direction (Y-axis direction). The first positive plate supply unit may include a first-1 storage unit (110A) and a first-1 pickup unit. The second positive plate supply unit may include a first-2 storage unit (110B) and a first-1 pickup unit.

[0054] The first storage unit (110) may include a first-1 storage unit (110A) and a first-2 storage unit (110B) arranged facing each other in a second direction (Y-axis direction). The first-1 storage unit (110A) may be arranged on one side in the second direction, and the first-2 storage unit (110B) may be arranged on the other side.

[0055] Accordingly, the first direction (X-axis direction) in which the first-1 storage unit (110A) and the first-2 storage unit (110B) are spaced apart can be perpendicular to the first direction (Y-axis direction) in which the positive plate supply module and the negative plate supply module are spaced apart.

[0056] According to this configuration, after the positive plate (41) picked up from the first-1 storage unit (110A) is moved to the first alignment stage (130) by the first transfer unit (120) (S11A), the positive plate (41) picked up from the first-2 storage unit (110B) can be sequentially moved to the first alignment stage (130) by the first transfer unit (120) (S11). Thus, the TAC time for supplying the positive plate (41) to the stacking head (310) can be reduced. In addition, even if a defect occurs in one supply unit, the positive plate (41) can continue to be supplied from the other supply unit, so the defective supply unit can be repaired without stopping the stacking device.

[0057] The manufacturing speed of an electrode assembly (EA) is determined by the sum of the times required at each stage, such as the time taken to retrieve electrode plates from the storage unit, the time taken to align the electrode plates, the time taken to stack the aligned electrode plates on the stacking stage, and the time taken to alternately stack cathode and anode plates. Therefore, it may be important to reduce the working time for each stage.

[0058] In the embodiment, electrode plates are alternately supplied to the stacking head (310) by the first-1 storage unit (110A) and the first-2 storage unit (110B) (S11, S11A). Thus, the time required to retrieve electrode plates from the storage unit can be reduced.

[0059] The negative plate supply module (200) can be arranged symmetrically with respect to the positive plate supply module (100) in a first direction with respect to the stacking head (310). The negative plate supply module (200) may have at least one pickup unit arranged therein to move the negative plate (42) stored in the second storage unit (210) to the second transfer unit (220) (S21), and then move it from the second transfer unit (220) to the second alignment stage (230) (S22).

[0060] The second storage unit (210) of the cathode plate supply module (200) may include a second-1 storage unit (210A) and a second-2 storage unit (210B) arranged facing each other in a second direction. The second-1 storage unit (210A) is arranged on one side in the second direction and the second-2 storage unit (210B) is arranged on the other side so that they can alternately supply the cathode plate (42) (S21, S21A). Accordingly, the TAC time for supplying the cathode plate (42) to the stacking head (310) can be reduced.

[0061] However, it is not necessarily limited to this, and the 2-1 storage unit (210A) and the 2-2 storage unit (210B) may be arranged to face each other in the first direction (X-axis direction). Accordingly, the 2-2 storage unit (210B) may be placed at the location of the collection unit (215).

[0062] The separator supply module (500) can supply the separator (43) to the stacking head (310). The separator (43) can be supplied to the stacking head (310) across the upper part of the anode plate supply module (100) by a plurality of rollers.

[0063] The stacking head (310) can produce an electrode assembly (EA) by stacking an anode plate (41) received from an anode plate supply module (100), a cathode plate (42) supplied from a cathode plate supply module (200), and a separator (43) supplied from a separator supply module (500) on a stacking stage (320). This electrode assembly may be a concept that includes all various cells capable of performing the role of a battery.

[0064] The pulling module (600) can move in a first direction through the lower part of the cathode plate supply module (200) to access the electrode assembly (EA) that has completed stacking. Then, it can retract while holding the electrode assembly (EA) and transport the electrode assembly (EA) to the finishing area (WA) (S30).

[0065] The winding module (800) placed in the finishing area can be attached to the electrode assembly (EA) after winding the separator (43) remaining on the electrode assembly (EA). The electrode assembly (EA) that has been finished can be moved to the location where the transport unit (50) is placed and then moved to the heating module (20) by the transport unit (50) (S40).

[0066] A laminated electrode assembly (EA) requires a lamination process to bond the electrodes and the separator (43). This lamination process generally involves heating the electrode assembly (EA), which has a structure in which the positive electrode plate (41) and the negative electrode plate (42) are laminated with the separator (43) in between, to bond the electrode plates and the separator.

[0067] The heating module (20) according to the embodiment may be a so-called high-frequency induction heating structure that generates heat by applying high frequency to a metal conductor. High-frequency induction heating is a method of heating a metal conductor by applying high frequency to a metal conductor to generate eddy currents near the surface of the metal conductor, and utilizing the phenomenon in which power loss generated by these eddy currents is converted into heat loss.

[0068] High-frequency induction heating has the advantage of being able to apply heat to metal in a non-contact manner. That is, heat can be directly generated in the current collector located inside the electrode assembly (EA), so that multiple heat-generating points are located inside the electrode assembly (EA) as a whole, which shortens the heat conduction section and reduces the temperature variation. Since the temperature variation of the electrode assembly (EA) is reduced, there is no need to apply excessive heat to raise the temperature to the temperature required for thermal bonding, and as a result, energy efficiency is increased.

[0069] The electrode assembly (EA) that has been heated can be moved to the pressurizing module (30) (S50). The pressurizing module (30) can pressurize the electrode assembly (EA) at a predetermined temperature to bond the electrode plate to the separator. In the embodiment, the heating module (20) and the pressurizing module (30) were described separately, but the heating module (20) and the pressurizing module (30) may be performed simultaneously by a single device.

[0070] FIGS. 2a and 2b are drawings showing the sequence of transporting an anode plate and a cathode plate according to one embodiment. FIG. 3 is a drawing showing the sequence of transporting an anode plate and a cathode plate according to another embodiment. FIG. 4 is a drawing showing the sequence of transporting an anode plate and a cathode plate according to yet another embodiment.

[0071] Referring to FIGS. 2a and 2b, the first transfer unit (120) may include a first-1 transfer stage (121) for transporting an anode plate stored in a first-1 storage unit (110A) and a first-2 transfer stage (122) for transporting an anode plate stored in a first-2 storage unit (110B).

[0072] The first-1 transfer stage (121) and the first-2 transfer stage (122) can alternately transport positive plates to the first alignment stage (130). As shown in FIG. 2a, when the first-2 transfer stage (122) transports the positive plate stored in the first-2 storage unit (110B) to the first alignment stage (130), the first-1 transfer stage (121) can be seated with the positive plate stored in the first-1 storage unit (110A).

[0073] Subsequently, as shown in FIG. 2b, when the first-1 transfer stage (121) transports the positive plate to the first alignment stage (130), the first-2 transfer stage (122) can be placed on the positive plate stored in the first-2 storage unit (110B).

[0074] The first-1 and first-2 transfer stages (121, 122) of the first transfer unit (120) and the second-1 and second-2 transfer stages (221, 222) of the second transfer unit can move in opposite directions. For example, as shown in FIG. 2a, when the first-1 and first-2 transfer stages (121, 122) of the first transfer unit (120) move in the second-2 direction (Y2 axis direction), the second-1 and second-2 transfer stages (221, 222) of the second transfer unit (220) can move in the second-1 direction (Y1 axis direction).

[0075] Accordingly, the first-1 and first-2 transfer stages (121, 122) of the first transfer unit (120) and the second-1 and second-2 transfer stages (221, 222) of the second transfer unit (220) are arranged in a zigzag pattern to supply positive plates and negative plates.

[0076] Referring to FIG. 3, the first-1 storage unit (110A) and the first-2 storage unit (110B) may be arranged to face each other in the first direction (X-axis direction). Additionally, the second-1 storage unit (210A) and the second-2 storage unit (210B) may be arranged to face each other in the first direction. With this configuration, the space where the first-2 storage unit and the second-2 storage unit were previously spaced apart in the second direction (Y-axis direction) can be reduced, which has the advantage of reducing the size of the stack device.

[0077] The first transfer unit (120) can alternately transfer positive plates stored in the first-1 storage unit (110A) and the first-2 storage unit (110B) to the first alignment stage (130). At this time, the first transfer unit (120) may transfer positive plates to a single transfer stage, or multiple transfer stages may move so as not to cross each other, thereby alternately transferring positive plates stored in the first-1 storage unit (110A) and the first-2 storage unit (110B) to the first alignment stage (130). For example, when the first transfer stage moves, the second transfer stage may move by vertically rising so as not to cross each other.

[0078] The second transfer unit (220) can alternately transfer the negative plates stored in the second-1 storage unit (210A) and the second-2 storage unit (210B) to the second alignment stage (230). At this time, the second transfer unit may transfer to a single transfer stage, or it may alternately transfer the negative plates stored in the second-1 storage unit (210A) and the second-2 storage unit (210B) to the first alignment stage (130) while moving so that multiple transfer stages do not cross each other.

[0079] Referring to FIG. 4, the positive plates stored in the first-1 storage unit (110A) and the first-2 storage unit (110B) may be transferred directly to the first alignment stage (130) by a pickup module without a separate transfer unit. Additionally, the negative plates stored in the second-1 storage unit (210A) and the second-2 storage unit (210B) may be transferred directly to the second alignment stage (230) by a pickup module without a separate transfer unit. With this configuration, the transfer unit can be omitted, thereby reducing the size of the stack device.

[0080] FIG. 5 is a drawing showing a stack device according to one embodiment.

[0081] Referring to FIG. 5, the stack device according to the embodiment includes a stacking stage (320) in which an anode plate (41), a cathode plate (42), and a separator (43) are stacked, an anode plate supply module (100) that supplies an anode plate (41) to the stacking stage (320), a cathode plate supply module (200) that supplies a cathode plate (42) to the stacking stage (320), and a stacking head (310) that stacks the anode plate (41) provided by the anode plate supply module (100) and the cathode plate (42) supplied by the cathode plate supply module (200) on the stacking stage (320).

[0082] An anode plate supply module (100) may be placed on one side centered on the stacking head (310), and a cathode plate supply module (200) may be placed on the other side.

[0083] The positive plate supply module (100) may include a first storage unit (110), a first transfer unit (120), and a first alignment stage (130) arranged in a first direction. A first-1 pickup unit (140) can move a positive plate (41) stored in the first storage unit (110) to the first transfer unit (120), and a first-2 pickup unit (150) can move a positive plate (41) placed in the first transfer unit (120) to the first alignment stage (130).

[0084] The cathode plate supply module (200) may include a second storage unit (210), a second transfer unit (220), and a second alignment stage (230). A second-1 pickup unit (240) can move a cathode plate (42) stored in the second storage unit (210) to the second transfer unit (220), and a second-2 pickup unit (250) can move a cathode plate (42) placed in the second transfer unit (220) to the second alignment stage (230).

[0085] The stacking stage (320) and the stacking head (310) may be positioned between the positive plate supply module (100) and the negative plate supply module (200). The separator supply module (500) may transport the separator (43) to the top of the positive plate supply module (100) and supply it to the stacking head (310).

[0086] The pulling module (600) and the cutting module (700) can be positioned below the stacking head (310). According to an embodiment, the pulling module (600) and the cutting module (700) can be positioned around the stacking stage (320) to reduce the size of the device.

[0087] In the case of a structure where the stacking stage (320) moves left and right to stack the positive plate and the negative plate, there is a disadvantage that the size of the device must be increased because the pulling module and the cutting module must be sufficiently spaced apart from the stacking stage, as a space for swinging left and right is required.

[0088] However, according to the embodiment, since the stacking stage (320) is fixed and the stacking head (310) is swinging, the pulling module (600) and the cutting module (700) can be placed near the stacking stage (320) even during the stacking process, thus having the advantage of reducing the device size.

[0089] FIG. 6 is a drawing showing a first storage unit, a first transfer unit, and an anode plate inspection unit according to one embodiment. FIGS. 7a to 7e are drawings showing the process of an anode plate stored in the first storage unit being transferred to an anode plate inspection unit.

[0090] Referring to FIGS. 6, FIGS. 7a, and FIGS. 7b, the positive plate supply module (100) can have the first-1 pickup unit (140) pick up the positive plate (41) stored in the first storage unit (110) and move it to the first transfer stage (121) of the adjacent first transfer unit (120).

[0091] A spray unit (149) is positioned on the side of the first storage unit (110) to spray air onto the positive plate picked up by the first-1 pickup unit (140). With this configuration, air is sprayed between each positive plate during pickup, making it easier to separate the electrode plates.

[0092] The first transfer unit (120) may include a rail section (122) extended in a second direction and a first transfer stage (121) positioned on the rail section (122) and reciprocating in the second direction. The first transfer stage (121) can move to a point adjacent to the first alignment stage (130) when the positive plate (41) is seated.

[0093] Referring to FIG. 7c and FIG. 7d, the first-second pickup unit (150) can pick up the positive plate (41) transported by the first transfer stage (121) and place it on the first alignment stage (130). The first-second pickup unit (150) can move in a direction parallel to the direction of movement of the first-first pickup unit (140).

[0094] According to the embodiment, various methods of moving the positive plate (41) by the pickup unit may all be applied. For example, when the positive plate (41) is placed on the first transfer stage (121), the first-second pickup unit (150) may move to the top of the first transfer stage (121) to pick up the positive plate (41) and then place it on the first alignment stage (130). Alternatively, the first-first pickup unit (140) may pick up the positive plate (41) from the first storage unit (110) and then move to place the positive plate (41) directly on the first alignment stage (130).

[0095] Referring to FIG. 7e, the first alignment stage (130) can be rotated toward the stacking head (310) so that the stacking head (310) can pick up the positive plate (41). The stage drive unit (131) can rotate the first alignment stage (130) toward the stacking head (310) and then return the first alignment stage (130) to its original position.

[0096] The negative plate supply module (200) can also supply a negative plate (42) to the stacking head (310) according to the same configuration as FIGS. 7a to 7e. The negative plate supply module (200) may have the same configuration and operation as the positive plate supply module (100), except for supplying the negative plate (42).

[0097] FIG. 8a is a drawing showing a first-1 pickup unit according to one embodiment. FIG. 8b is a drawing showing the process of removing two electrode plates attached by the first-1 pickup unit. FIG. 9a and FIG. 9b are drawings showing the process of rotating an adsorption part disposed in a sub-block.

[0098] Referring to FIGS. 8a and 8b, a plurality of positive plates (41) are stacked in the first storage unit (110), and a height adjustment part (112) may be disposed at the bottom of the first storage unit (110). Thus, even if the number of positive plates (41) is reduced, the height of the uppermost positive plate (41) can always be maintained at a constant level. The first storage unit (110) may include a plurality of fixing frames (111) that fix the corners of the plurality of positive plates and a fixing plate (113) that fixes the plurality of fixing frames (111).

[0099] The first-1 pickup unit (140) can pick up the uppermost positive plate (41). However, there may be cases where two positive plates (41) are picked up together. In the following description, cases where multiple electrode plates are attached are defined as two plates, but it is obvious that cases with two or more plates are also included. Since electrode plates such as the positive plate (41) and the negative plate (42) are made of metal, when multiple plates are stacked, they may stick to each other due to electrostatic force. When manufacturing an electrode assembly, if two identical electrode plates are stacked, a defect occurs, so it is necessary to remove the electrode plate attached to the bottom.

[0100] An eddy current displacement sensor (first sensor, 145) may be placed in the first-1 pickup unit (140). The eddy current displacement sensor (145) uses a high-frequency magnetic field, and when a metal is brought close to the high-frequency magnetic field, a swirling eddy current flows in the metal due to electromagnetic induction.

[0101] Eddy currents are concentrated on the metal surface and decrease exponentially with depth. Eddy currents vary depending on the strength and frequency of the high-frequency magnetic field, as well as the conductivity and transmittance of the metal. Distance can be measured by utilizing the property that the high-frequency impedance changes when the distance between the sensor coil and the metal plate changes. Therefore, when two electrode plates are attached, the impedance changes, indicating that two plates have been picked up.

[0102] A second sensor (147a, 147b) including a transmitter (147a) and a receiver (147b) may be disposed on both sides of the first storage unit (110). When light is irradiated from the transmitter (147a), the receiver (147b) disposed on the opposite side can receive the light. For example, the transmitter (147a) and the receiver (147b) may be fiber sensors, but are not limited to this; any structure in which a signal transmitted from one side is received on the other side can be applied without limitation.

[0103] The uppermost positive plate (hereinafter referred to as the first positive plate) stored in the first storage unit (110) and the positive plate (hereinafter referred to as the second positive plate) placed below it may be attached to each other by electrostatic force in only a portion of their regions. Therefore, when the first positive plate (41a) is picked up by the first-1 pickup unit (140), only a portion of the second positive plate (41b) may be attached to the first positive plate (41a), and the remaining region may be separated from the first positive plate (41a). In this case, if the first positive plate (41a) and the second positive plate (41b) are separated in the region detected by the eddy current displacement sensor (145), there is a possibility of mistaking them for a single plate.

[0104] However, according to the embodiment, if a portion of the second positive plate (41) is detached, it blocks the transmission signal of the transmitting unit (147a), so that the receiving unit (147b) cannot receive it. Therefore, the control unit (not shown) of the stack device can determine that there are two plates attached even if it is determined that there is only one plate based on the detection signal of the eddy current displacement sensor (145), but the detection signal of the receiving unit (147b) is not input.

[0105] In order for the pickup module to quickly sense two plates during the process of picking up the electrode plates, the transmitter (147a) and the receiver (147b) can be positioned lower than the top of the storage unit (110).

[0106] According to an embodiment, a signal is received from an eddy current displacement sensor to detect whether there are two sheets, and if two sheets are not detected, a signal from a second sensor can be received to reconfirm whether there are two sheets. If it is determined that there are two sheets by receiving a signal from the eddy current displacement sensor, the signal from the second sensor may not be received.

[0107] In addition, when multiple eddy current displacement sensors (145) are arranged in the body part (141), a structure of two plates with some parts separated can also be sensed by detecting whether there are two plates of positive plates at different locations.

[0108] In addition, sensing can be performed after applying vibration to the electrode plates that were picked up in advance before sensing. The pickup unit can move up and down, or vibrate or rotate to shake the electrode plates and remove two plates.

[0109] The first-1 pickup unit (140) may include a body part (141) having a plurality of adsorption parts (142a) arranged thereon for picking up a positive plate (41), and a pickup moving part (146) for moving the body part (141) in a vertical direction and / or a left-right direction. The pickup moving part (146) may include a first moving part (146a) for raising and lowering the body part (141), and a second moving part (146b) for moving the body part (141) left-right. The pickup moving part (146) may further include a third moving part (not shown) for rotating the body part (141) in a clockwise and counter-clockwise direction.

[0110] The adsorption part (142a) is connected to a vacuum pump and can adsorb the upper surface of the anode plate (41). However, it is not necessarily limited to this, and various structures that can be attached to and detached from the upper surface of the anode plate (41) can be applied to the adsorption part (142a) without limitation. In addition, the number of adsorption parts (142a) can also be varied.

[0111] Vibration units may be disposed at both ends of the body portion (141). The vibration unit may include a block driving unit (144) connected to the body portion (141) and a sub-block (143) on which an auxiliary adsorption unit (142b) is disposed, and a block driving unit (144) that drives the sub-block (143).

[0112] The sub-block (143) may include a first sub-block disposed at one end of the body portion (141) and a second sub-block disposed on the other side of the body portion (141). However, the number of sub-blocks may vary.

[0113] The block drive unit (144) is connected to the body unit (141) and the sub-block (143) and can move the sub-block (143) away from or closer to the body unit (141). Various driving means, such as a motor or a cylinder, can be applied to the block drive unit (144).

[0114] Additionally, the block drive unit (144) may move the sub-block (143) in a vertical direction. That is, the block drive unit (144) may move the sub-block (143) in various directions to separate the two electrode plates. For example, an elastic member (144a), such as a plate spring, may be further disposed between the sub-block (143) and the body unit (141).

[0115] Referring to FIG. 8b, when the sub-block (143) moves away from the body part (141) by the block driving part (144), the distance between the auxiliary adsorption part (142b) on the sub-block (143) and the adsorption part (142a) placed on the body part (141) changes, causing deformation and repeated bending in a part area (TP1) of the positive plate (41). Due to these various vibration effects, a force greater than the electrostatic force between the electrodes is transmitted to the electrode plate, causing the electrode plate attached to the bottom to detach. The detached positive plate (41) can be stored in the collection unit (115).

[0116] According to the embodiment, the first-1 pickup unit (140) can drive the block drive unit (144) when picking up the positive plate (41) to impart vibration to the positive plate (41).

[0117] Referring to FIGS. 9a and 9b, the sub-block (143) may be rotated by the block driving unit (144). Accordingly, the auxiliary adsorption unit (142b) placed on the sub-block (143) swings, and the adsorption unit (142a) placed on the body unit (141) is fixed, so the electrode plate may be twisted between the part adsorbed to the auxiliary adsorption unit (142b) and the part adsorbed to the adsorption unit (142a). Therefore, when two electrode plates are attached, they can be effectively separated.

[0118] FIG. 10 is a drawing showing a first-1 pickup unit according to another embodiment. FIG. 11a and FIG. 11b are drawings showing the process of the electrode plate being bent by tilting the adsorption portion of the first-1 pickup unit.

[0119] Referring to FIG. 10, the body portion (141) includes a first body portion (141a) having a plurality of adsorption portions (142a) and a second body portion (141b) having a plurality of adsorption portions (142a), and a rotating member (148b) may be coupled between the first body portion (141a) and the second body portion (141b).

[0120] The vibrating part (148) can rotate the first body part (141a) and the second body part (141b) in opposite directions. The vibrating part (148) may be equipped with a pressurizing part (148a) connected to each of the first body part (141a) and the second body part (141b). The pressurizing part (148a) may be retracted or extended by a motor or cylinder. However, it is not necessarily limited to this, and various rotational structures can be applied to the structure for rotating the first body part (141a) and the second body part (141b).

[0121] Referring to FIG. 11a, when the pressurizing part (148a) contracts, the outer side of the first body part (141a) and the outer side of the second body part (141b) rotate in opposite directions. At this time, the rotating member (148b) can be rotatably coupled to the inner side of the first body part (141a) and the inner side of the second body part (141b).

[0122] According to this configuration, the adsorption part (142a) placed in the first body part (141a) and the adsorption part (142a) placed in the second body part (141b) are tilted, so the picked-up positive plate (41) is bent so that both ends face upward.

[0123] Conversely, as shown in FIG. 11b, when the pressure portion (148a) is extended, the outer side of the first body portion (141a) and the outer side of the second body portion (141b) rotate in opposite directions. Accordingly, the positive plate (41) is bent so that both ends face downward. If this tilt operation is performed quickly, the positive plate attached to the bottom can be separated.

[0124] FIG. 12 is a drawing showing an inspection unit according to one embodiment. FIG. 13 is an image of a positive plate placed on a first alignment stage. FIG. 14 is an image of a negative plate placed on a second alignment stage.

[0125] Referring to FIG. 12, the inspection module (400) may include an anode inspection unit (410), a cathode inspection unit (420), and a stacking inspection unit. The anode inspection unit (410) can inspect whether the anode plate (41) is aligned on the first alignment stage (130). The anode plate (41) must be aligned on the first alignment stage (130) so that the stacking head can pick it up accurately.

[0126] If it is determined that the inspection result is not aligned, a first alignment unit (not shown) placed below the first alignment stage (130) can move the first alignment stage (130) slightly so that the positive plate is placed in the alignment position.

[0127] The cathode plate inspection unit (420) can inspect whether the cathode plate (42) is aligned on the second alignment stage (230). The cathode plate (42) must be aligned on the second alignment stage (230) so that the stacking head can pick it up accurately.

[0128] If it is determined that the inspection result is not aligned, a second alignment unit (not shown) positioned below the second alignment stage (230) can move the second alignment stage (230) slightly so that the negative plate is positioned in the alignment position.

[0129] The stacking inspection unit can inspect whether the positive plate (41) and the negative plate (42) stacked on the stacking stage (320) are aligned.

[0130] The anode plate inspection unit (410) may include a first camera (411) and a first lighting unit (412) positioned at the bottom of the first alignment stage (130). The first lighting unit (412) may include a flat dome structure to irradiate light onto the anode plate (41) uniformly from various angles. However, the first lighting unit (412) may also have various lighting structures that irradiate light so that the first camera can easily inspect the anode plate (41). According to the embodiment, since the first camera (411) is positioned at the bottom of the first alignment stage (130) to photograph the anode plate (41), diffuse reflection is reduced, allowing a clear image to be obtained.

[0131] The cathode plate inspection unit (420) may include a second camera (421) and a second lighting unit (422) positioned above the second alignment stage (230). The second lighting unit (422) may include a backlight structure that irradiates light from the bottom of the cathode plate (42). However, the second lighting unit (422) may also be equipped with various lighting structures that irradiate light so that the second camera (421) can easily inspect the cathode plate (42). According to an embodiment, since the second lighting unit (422) irradiates light to the bottom of the cathode plate (42) and the second camera (421) is positioned above the second alignment stage (230) to photograph the cathode plate (42), diffuse reflection is reduced, allowing a clear image to be obtained.

[0132] According to the embodiment, the first camera (411) for photographing the positive plate (41) is positioned below the positive plate (41), while the second camera (421) for photographing the negative plate (42) can be positioned above the negative plate (42). This structure has the advantage of utilizing the lower space of the second alignment stage (230). Accordingly, as described below, the pulling module (600) has the advantage of being able to approach the lower space of the second alignment stage (230) and grasp the electrode assembly placed on the stacking stage (320).

[0133] FIGS. 15a to 15c are drawings showing the process of a positive plate, a negative plate, and a separator being stacked on a stacking stage by a stacking head.

[0134] Referring to FIG. 15a, the stacking head (310) may include a first head part (312) that rotates to face a first alignment stage (130) to pick up an anode plate (41), a second head part (313) that rotates to face a second alignment stage (230) to pick up a cathode plate (42), a head rotation part (318) that rotates the first head part (312) and the second head part (313), and a feeding roller (316) disposed between the first head part (312) and the second head part (313) to provide a separator (43).

[0135] The first head section (312) and the second head section (313) may be positioned at a predetermined angle. For example, the first head section (312) and the second head section (313) may be positioned at a 45-degree angle, but are not necessarily limited to this and may be positioned at various angles. Depending on the angle of inclination of the first head section (312) and the second head section (313), the angles of the first alignment stage and the second alignment stage may also be adjusted.

[0136] The first head unit (312) and the second head unit (313) may each have a third pickup unit (314) capable of adsorbing an electrode plate. The third pickup unit (314) may move up and down in the longitudinal direction (Z direction) of the head unit to pick up an electrode plate placed on the first and second alignment stages (130, 230). According to an embodiment, the third pickup unit (314) may move up and down independently of the rotation of the first head unit (312) and the second head unit (313).

[0137] A feeding roller (316) positioned between the first head section (312) and the second head section (313) can continuously supply the separator (43). According to the embodiment, since the feeding roller (316) is positioned between the first head section (312) and the second head section (313), the first head section (312) and the second head section (313) can perform the role of a shield. Therefore, there is an advantage in that the wind resistance applied to the separator (43) can be minimized even when the first head section (312) and the second head section (313) rotate.

[0138] The third pickup unit (314) may include an auxiliary roller (314a) that guides the separator (43). The auxiliary rollers (314a) positioned in the first head section (312) and the second head section (313), respectively, may be positioned facing each other.

[0139] A plurality of support units (330) positioned adjacent to the stacking stage (320) can fix both sides of the positive plate (41), the negative plate (42), and the separator (43) by pressing them.

[0140] A plurality of support units (330) can be moved horizontally inward and outward on the stacking stage (320) and can be moved outward on the stacking stage (320) so as not to interfere with the stacking process while the positive plate (41), the negative plate (42), and the separator (43) are stacked.

[0141] When the positive plate (41), the negative plate (42), and the separator (43) are stacked on the upper surface of the stacking stage (320), the multiple support units (330) move inward and then descend to press the positive plate (41), the negative plate (42), and the separator (43).

[0142] Referring to FIG. 15b, the first head part (312) can be rotated in a first rotational direction by the head rotation part (318) and positioned on the upper part of the stacking stage (320). The first head part (312) can stack the picked-up positive plate (41) on the stacking stage (320). The first rotational direction may be counterclockwise, but is not necessarily limited thereto and may be clockwise.

[0143] At this time, the plurality of support units (330) that were pressing the separator (43) can all move to the outside of the stacking stage (320) to prevent interference. Afterwards, when the positive plate (41) is placed on the separator (43), the plurality of support units (330) can move to the upper part of the positive plate (41) to support the positive plate (41).

[0144] Referring to FIG. 15c, the second head part (313) can be rotated in a second rotational direction by the head rotation part (318) and placed on the upper part of the stacking stage (320). The second rotational direction may be clockwise, but is not necessarily limited thereto and may be counterclockwise.

[0145] The second head unit (313) can stack the picked-up negative plate (42) onto the stacking stage (320). At this time, the plurality of support units (330) that were pressing the separator (43) can all move to the outside of the stacking stage (320) to prevent interference. Afterward, when the negative plate (42) is placed on the separator (43), the plurality of support units (330) can move again to the upper part of the negative plate (42) to support the negative plate (42).

[0146] FIG. 16 is a drawing showing a stacking stage and a plurality of support units according to one embodiment. FIG. 17 is a drawing showing three-axis driving of the support units. FIG. 18 is a drawing showing a state in which a plurality of support units press an electrode plate.

[0147] Referring to FIG. 16, a stacking stage (320) may have a plurality of slits (322) formed therein. Accordingly, a plurality of electrode plates may be supported on a protruding support (321) positioned between the plurality of slits (322) of the stacking stage (320). Subsequently, a clamp (610) of a pulling module (600) may be inserted through the plurality of slits (322).

[0148] A stage drive unit (324) for raising and lowering the stacking stage (320) may be disposed at the bottom of the stacking stage (320). With this configuration, the stacking stage (320) can maintain a constant height of the electrode disposed at the top even when multiple electrode plates are disposed.

[0149] According to the embodiment, the stacking stage (320) is manufactured to be fixed so as not to move, thereby preventing the alignment of the stacked electrodes from becoming disordered. However, it is not necessarily limited to this, and a driving unit that drives the stacking stage (320) along the X-axis and Y-axis for alignment may be additionally provided.

[0150] Referring to FIGS. 17 and 18, a plurality of support units (330) can press and support an anode plate (41), a cathode plate (42), and a separator (43). The plurality of support units (330) may include a support pin (331) that presses the anode plate (41), the cathode plate (42), and the separator (43), a first support driving unit (333) that moves the support pin (331) in a horizontal direction, and a second support driving unit (333) that moves the support pin (331) in a vertical direction. The support pin (331) may be attached to a connecting member (332) connected to the first support driving unit (333) and move together.

[0151] The first support drive unit (333) and the second support drive unit (333) can be driven independently of each other. Thus, the support pin (331) can be quickly moved onto or off the stacking stage (320). For example, the support pin (331) can be moved horizontally by the first support drive unit (333) while the vertical height of the support pin (331) is maintained by the second support drive unit (333). Alternatively, the support pin (331) can be moved horizontally by the first support drive unit (333) and simultaneously raised vertically by the second support drive unit (333).

[0152] When the vertical drive unit and the horizontal drive unit are connected to each other, there is a problem of time delay because for vertical and horizontal movement, horizontal movement must be performed after the vertical movement is completed or after the horizontal movement is completed.

[0153] The first support drive unit (333) may include a first-1 support drive unit (333a) that moves the support pin (331) in a first direction and a first-2 support drive unit (333b) that moves the support pin (331) in a second direction perpendicular to the first direction. The first-1 support drive unit (333a) and the first-2 support drive unit (333b) that move the pin may also be driven independently. According to the embodiment, since the support pin is driven independently in two or three axes, the pressing and releasing of the electrode assembly are accelerated, and the TAC time can be accelerated.

[0154] At least one hole (331a) may be formed in the support pin (331). By this hole (331a), a shooting exposure area (SP1) may be formed in which the corner area is exposed when the support pin (331) presses against any one of the positive plate, negative plate, and separator constituting the electrode assembly. Therefore, there is an advantage in that the corner area of ​​the electrode assembly can be photographed even when the electrode assembly is pressed against the support pin, thereby allowing for accurate determination of alignment.

[0155] Holes (331a) may be formed in only some of the multiple support pins (331). However, this is not necessarily limited to this, and holes (331a) may be formed in all of the support pins (331).

[0156] FIG. 19 is a drawing showing a membrane supply module according to one embodiment. FIG. 20 is a drawing showing a state in which the tension of the membrane is controlled by the membrane supply module according to one embodiment.

[0157] Referring to FIGS. 19 and 20, the separator supply module (500) may include an unwinder (50) on which a wound separator is placed, a plurality of rollers (511) for providing a separator (43), a plurality of length adjustment rollers (512), a main supply roller (513), and a pair of side walls (510) supporting both ends of the rollers.

[0158] The membrane supply module (500) may include a meandering adjustment unit (516) that prevents meandering, which is a phenomenon where the membrane moves diagonally to the left or right when supplied. By the meandering adjustment unit (516), the direction of the membrane (43) wound on a plurality of rollers (511) can be adjusted as the first structural plate (515) and the side wall (510) move on the second structural plate (517). Various driving members, such as a motor, that adjust the relative positions of the first structural plate (515) and the second structural plate (517) may be used for the meandering adjustment unit (516). However, it is not necessarily limited to this, and various known structures capable of preventing the meandering of the membrane may be applied to the meandering adjustment unit without limitation.

[0159] The separator (43) supplied through the separator supply module (500) can be supplied onto the stacking stage (320) through the feeding roller (316) of the stacking head (310).

[0160] At this time, as the stacking head (310) rotates, the tension of the separator (43) may momentarily loosen, causing the separator (43) to be placed unevenly on the electrode plate. To prevent this, a tension control module (520) may be placed between the separator supply module (500) and the feeding roller (316) of the stacking head (310).

[0161] The tension control module (520) can move between the separator supply module (500) and the feeding roller (316) to control the tension of the separator (43) when the tension of the separator (43) becomes loose for various reasons. Accordingly, the tension of the separator (43) supplied through the feeding roller (316) is maintained, thereby preventing stacking defects.

[0162] The tension control module (520) may include a plurality of tension rollers (521) that guide the membrane and a roller drive unit (522) that moves the tension rollers (521) forward or backward toward the membrane supply module (500).

[0163] Additionally, the tension control module (520) may further include a sensing sensor (523) for detecting the tension of the separator. The tension control module (520) can apply tension to the separator by retracting the tension roller (521) to prevent the tension of the separator from becoming loose. Conversely, the roller drive unit (522) can control the tension of the separator to be weak by advancing the tension roller (521).

[0164] FIG. 21 is a diagram showing the process of inspecting the alignment of electrode assemblies stacked on a stacking stage. FIG. 22 is a plan view showing the state in which the positive plate is adsorbed by a third pickup module. FIG. 23 is a diagram showing the process of determining alignment through a captured image of the positive plate.

[0165] Referring to FIGS. 12, FIGS. 15c and FIGS. 21, the stack inspection unit may include a third camera (441) and a fourth camera (451) positioned on a first frame (431) and a second frame (432) connecting a first alignment stage (130) and a second alignment stage (230). Additionally, it may include a third lighting unit (442) and a fourth lighting unit (452).

[0166] A reflective mirror (317) may be disposed in the first head portion (312) and the second head portion (313) of the stacking head (310), respectively. A third camera (441) disposed in the first frame (431) and a fourth camera (451) disposed in the second frame (432) may each capture a planar image of the electrode assembly (EA) reflected through the reflective mirror (317). For example, the third camera (441) may capture an image of one end of the electrode assembly (EA), and the fourth camera (451) may capture an image of the other end of the electrode assembly (EA).

[0167] Since the stacking head (310) is positioned on the upper part of the stacking stage (320), the camera can be positioned diagonally to photograph the electrode assembly (EA) to avoid this. However, in this case, only an image of the electrode assembly (EA) positioned at an angle can be captured, so there is a problem in that it is difficult to accurately measure whether it is aligned. However, according to the embodiment, since an image of multiple electrode plates stacked vertically can be captured, there is an advantage in that the alignment can be accurately measured.

[0168] Referring to FIGS. 22 and 23, the alignment of the stacked electrode plates can be determined by calculating the distance (d1, d2) between the reference mark (SRM) and the outer surface of the electrode plate in the stacked image. According to the embodiment, since the image is acquired through the reflective mirror (317) placed in the first head portion (312) and the second head portion (313) of the stacking head (310), the position within the image may vary depending on the tolerance of the reflective mirror. Therefore, the alignment can be determined by measuring the distance based on the reference mark (SRM).

[0169] Various existing image processing techniques can be applied to determine alignment. For example, alignment can be determined based on whether the distance or area from the outer edge of the electrode plate to a specific point satisfies a predetermined range.

[0170] FIG. 24 is a drawing showing the state in which the pulling module of a stack device according to one embodiment approaches the electrode assembly. FIG. 25 is a perspective view showing the cutting module and the pulling module. FIG. 26a to 26e are drawings showing the state in which the pulling module extracts the electrode assembly to the rear.

[0171] Referring to FIGS. 24, 25 and 26a, when the fabrication of the electrode assembly (EA) is completed, the pulling module (600) can approach the lower space of the cathode plate inspection unit and grasp the electrode assembly (EA) placed on the stacking stage (320). A rail (640) on which the pulling module (600) moves can be placed at the bottom of the cathode plate inspection unit.

[0172] A cutting module (700) may be disposed between the stacking stage (320) and the pulling module (600). An opening (721) may be formed in the cutting module (700) through which the gripper (610) of the pulling module (600) can pass. Thus, the pulling module (600) can pass through the cutting module (700) to access the stacking stage (320).

[0173] Referring to FIGS. 26b and 26c, the gripper driving unit (620) can narrow the gap of the gripper unit (610) so that the gripper unit (610) can grip the electrode assembly (EA). The gripper moving unit (630) can retract the gripper unit (610) while gripping the electrode assembly (EA). During this process, the separator (43) can be continuously supplied. A plurality of support units (330) can be moved outward from the stacking stage (320) to allow the separator (43) to be continuously supplied.

[0174] Referring to FIGS. 26d and 26e, when the pulling module (600) retracts to a predetermined position, the cutting module (700) can descend to cut the separator (43). The cutting module (700) may include a cutter (710) for cutting the separator (43), a cutter support (720) for supporting the cutter (710), and a cutter drive (730) for raising and lowering the cutter support (720). As described above, an opening (721) may be formed in the cutter support (720) through which the gripper (610) of the pulling module (600) can pass.

[0175] FIG. 27 is a drawing showing a state in which an electrode assembly is moved to one side of a stack device by a pulling module according to one embodiment. FIG. 28 is a drawing showing a winding module according to one embodiment. FIG. 29 is a drawing showing a state in which a guide bar is supported by a hook of a clamping unit. FIG. 30a is a drawing showing a state in which an electrode assembly is fitted onto a guide bar of a winding module. FIG. 30b is a drawing showing a state in which the separator of an electrode assembly is wound as the first rotating part and the second rotating part of the winding module rotate.

[0176] Referring to FIGS. 27 and 28, the pulling module (600) can move to a finishing area (WA) provided on one side of the stack device while holding the electrode assembly (EA). The finishing area (WA) is an area where the cut separator (43) is wound and secured to the electrode assembly (EA).

[0177] The winding module (800) may include a first rotation unit (810) comprising a pair of guide bars (811) that fix both ends of the electrode assembly (EA), a second rotation unit (820) that fixes the ends of the pair of guide bars (811), and a brush unit (830) that fixes the cutting portion (43a) of the separator (43) to the electrode assembly (EA) when the electrode assembly (EA) is rotated.

[0178] The first rotation unit (810) may include a first plate (814), a sliding part (812) that slides on the first plate (814), a first support plate (815) disposed on the sliding part (812), a first rotation part (813) disposed on the first support plate (815), and a pair of guide bars (811) connected to the first rotation part (813). Additionally, it may include a first guide driving part (816) that drives the first rotation part (813) up, down, left, and right on the first support plate (815).

[0179] A pair of guide bars (811) can be formed long enough to support both sides of the electrode assembly (EA) entirely. If different guide bars hold each end of the electrode assembly and rotate it, the centers of rotation of the guide bars placed at both ends may not align, which can cause severe wrinkling. However, according to the embodiment, since a pair of guide bars (811) support both sides of the electrode assembly (EA) entirely, it is possible to prevent wrinkling from occurring on the separator (43) of the electrode assembly (EA).

[0180] A pair of guide bars (811) of the electrode assembly may each have a plate shape or a folded shape. If they are plate-shaped, each guide bar may be separated into two to support the upper and lower surfaces of the electrode assembly. If the pair of guide bars (811) are folded, the two guide bars (811) may each support the sides of the electrode assembly.

[0181] The second rotation unit (820) may include a second plate (824), a second support plate (825) disposed on the second plate (824), a second rotation part (823) disposed on the second support plate (825), and a holder (821) disposed on the second rotation part (823) to which a pair of guide bars (811) are coupled. Additionally, it may include a second guide drive part (826) that drives the second rotation part (823) up, down, left, and right on the second support plate (825).

[0182] The brush unit (830) may include a brush (831), a brush driving part (832) that drives the brush (831) up and down, and a fixing part (833) that fixes the brush driving part (832).

[0183] When the pulling module (600) moves to the finishing area while gripping the electrode assembly (EA), the sliding part (812) of the first rotating unit (810) can slide on the first plate toward the electrode assembly (EA).

[0184] Referring to FIG. 29, a pair of guide bars (811) are formed to be relatively long so that they can be moved while mounted on a clamp unit (840) and accurately inserted into the side of an electrode assembly (EA). At this time, the position or height of the pair of guide bars (811) can be adjusted by a first guide drive unit (816) so that they can be fitted well into the side of the electrode assembly (EA).

[0185] The clamp unit (840) may include a hook (841) for securing a pair of guide bars (811). The clamp unit (840) may move up, down, left, and right to secure the pair of guide bars (811). Thus, the clamp unit (840) may detach from the pair of guide bars (811) when the pair of guide bars (811) are coupled to the electrode assembly (EA). To this end, a width adjustment part (842) for adjusting the width of the pair of hooks (841) may be further provided.

[0186] Referring to FIG. 30a, when the first rotation unit (810) moves toward the second rotation unit (820), a pair of guide bars (811) can be fitted onto and supported on both sides of the electrode assembly (EA). Here, the pair of guide bars (811) are shown bent to support each side of the electrode assembly (EA).

[0187] At this time, a guide groove (611) through which a pair of guide bars (811) can pass can be formed in the gripper portion (610) of the pulling module (600) that grips the electrode assembly (EA). Accordingly, a pair of guide bars (811) can pass through the guide groove (611) of the gripper portion (610) and be coupled to the end of the electrode assembly (EA).

[0188] A pair of guide bars (811) connected to the end of the electrode assembly (EA) can be fixed to the holder (821) of the second rotation unit (820).

[0189] Referring to FIG. 30b, when the first rotating part (813) of the first rotating unit (810) and the second rotating part (823) of the second rotating unit (820) rotate, the electrode assembly (EA) also rotates together. Accordingly, the cutting part (43a) of the separator (43) that has not yet been wound onto the electrode assembly (EA) is wound onto the electrode assembly (EA).

[0190] The brush unit (830) can lower the brush (831) when the electrode assembly (EA) is coupled to the first rotation unit (810) and rotates. The brush (831) may be a cylindrical roller, but is not necessarily limited thereto. The brush (831) can guide the cutting portion (43a) of the separator (43) to be wound around the electrode assembly (EA) when the electrode assembly (EA) rotates.

[0191] Although not shown, adhesive may be applied to the separator (43) by a separate adhesive application unit. Accordingly, the cut portion (43a) of the separator (43) wound around the electrode assembly (EA) may be adhered to the electrode assembly (EA). According to the embodiment, the cut portion (43a) of the separator (43) can be automatically wound and fixed to the electrode assembly (EA). However, if the separator contains an adhesive component, the adhesive application unit may be omitted.

[0192] When the finishing process is completed, the first rotating unit (810) can move away from the second rotating unit (820). Since the pair of guide bars (811) are plate-shaped, they can be easily removed from the electrode assembly (EA) even when the separator (43) is wound during the winding process.

[0193] Afterward, the pulling module (600) can re-grasp the electrode assembly (EA) and transport it to the guide rail through which the heating module (20) is transported. However, this is not necessarily limited to this method, and the electrode assembly (EA) can also be transported to the heating module (20) using a separate transport unit.

[0194] FIG. 31 is a drawing showing a heating module of one embodiment.

[0195] A heating module (20) according to an embodiment may include a mounting plate (22) on which an electrode assembly (EA) is mounted and a high-frequency induction heating unit (23) that generates heat by applying high frequency. The high-frequency induction heating unit (23) may include a plurality of coils (24). Additionally, a coil lifting unit (25) for raising and lowering the high-frequency induction heating unit may be further included.

[0196] High-frequency induction heating is a method of heating a metal conductor by applying high frequency to the metal conductor to generate eddy currents near the surface of the metal conductor, and utilizing the phenomenon in which power loss caused by these eddy currents is converted into heat loss.

[0197] High-frequency induction heating has the advantage of being able to apply heat to metal in a non-contact manner. That is, heat can be directly generated in the current collector located inside the electrode assembly (EA), so that multiple heat-generating points are located inside the electrode assembly (EA) as a whole, which shortens the heat conduction section and reduces the temperature variation. Since the temperature variation of the electrode assembly (EA) is reduced, there is no need to apply excessive heat to raise the temperature to the temperature required for thermal bonding, and as a result, energy efficiency is increased.

[0198] FIG. 32 is a drawing showing a pressurizing module of one embodiment. FIG. 33 is a drawing showing a diaphragm placed on a lower pressurizing plate. FIG. 34 is a drawing showing a state in which the diaphragm of the lower pressurizing plate expands and the electrode assembly and the lower pressurizing plate are separated.

[0199] Referring to FIG. 32, the pressure module (30) may include a lower pressure plate (31), an upper pressure plate (32), and a pressure plate driving unit (38) for raising and lowering the upper pressure plate (32).

[0200] When the electrode assembly (EA) is transferred to the lower pressure plate (31), the pressure plate driving unit (38) can lower the upper pressure plate (32) to press the electrode assembly (EA). In this process, the positive plate, the negative plate, and the separator can be joined together.

[0201] Referring to FIGS. 33 and 34, a plurality of first through lines (34) are formed inside the lower pressure plate (31), and a first diaphragm (33) may be disposed on the upper part of the lower pressure plate (31).

[0202] The first through line (34) is connected to an external pump (40), and when air or fluid is injected, the first diaphragm (33) expands in the area connected to the first through line (34). Consequently, the contact area between the first diaphragm (33) and the electrode assembly (EA) is reduced by the expansion area of ​​the first diaphragm (33). Therefore, separation between the lower pressure plate (31) and the electrode assembly (EA) becomes easier.

[0203] According to the embodiment, air or fluid may be injected into a plurality of first penetration lines (34) simultaneously, or air or fluid may be injected sequentially.

[0204] FIG. 35 is a drawing showing a state in which a diaphragm is placed on a lower pressure plate and an upper pressure plate. FIG. 36 is a drawing showing a state in which the diaphragm of the upper pressure plate expands and the electrode assembly and the upper pressure plate are separated. FIG. 37 is a drawing showing a state in which the diaphragm of the lower pressure plate expands and the electrode assembly and the lower pressure plate are separated.

[0205] Referring to FIG. 35, a plurality of second through lines (37) are formed inside the upper pressure plate (32), and a second diaphragm (36) may be disposed at the bottom of the upper pressure plate (32). The second through lines (37) are connected to an external pump, so that when air or fluid is injected, the second diaphragm (36) connected to the second through lines (37) can expand.

[0206] Referring to FIG. 36, when pressurization is completed, air or fluid is injected through a plurality of second penetration lines (37) simultaneously with the rise of the upper pressure plate (32) so that the second diaphragm (36) can expand. The contact area between the second diaphragm (36) and the electrode assembly (EA) is reduced by the expansion area (36a) of the second diaphragm (36). Therefore, separation between the upper pressure plate (32) and the electrode assembly (EA) becomes easier.

[0207] Subsequently, when the upper pressure plate (32) rises, the first diaphragm (33) expands in the area connected to the first through line (34) as shown in FIG. 37. Accordingly, the contact area between the first diaphragm (33) and the electrode assembly (EA) is reduced by the expansion area (33a) of the first diaphragm (33). Consequently, the separation of the lower pressure plate (31) and the electrode assembly (EA) becomes easier.

[0208] However, it is not necessarily limited to this, and the first diaphragm (33) and the second diaphragm (36) may expand simultaneously or sequentially. Additionally, after the pressurization process is finished, the upper pressure plate (32) may rise while the first diaphragm (33) and the second diaphragm (36) expand together.

[0209] Although the invention has been described above with reference to embodiments, this is merely illustrative and does not limit the invention. Those skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments may be modified and implemented. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims. Explanation of the symbols

[0210] 100: Positive plate supply module 120: 1st Transfer Unit 130: First alignment stage 140: 1-1 Pickup Unit 200: Cathode plate supply module 220: 2nd Transfer Unit 230: Second alignment stage 240: 2-1 Pickup Unit 300: Stacked Module 310: Lamination head 320: Stacking stage 400: Inspection Unit 500: Separator supply module 600: Pooling Module 700: Cutting Module 800: Winding Module

Claims

Claim 1 A stacking device comprising: a stacking module including a stacking stage and a stacking head for stacking an anode plate, a cathode plate, and a separator on the stacking stage; an anode plate supply module for supplying the anode plate; and a cathode plate supply module for supplying the cathode plate, wherein the stacking module includes at least one support unit for supporting the anode plate, the cathode plate, and the separator stacked on the stacking stage, wherein the at least one support unit includes a support pin, a first support drive unit for moving the support pin in a horizontal direction, and a second support drive unit for moving the support pin in a vertical direction, wherein the first support drive unit and the second support drive unit are driven independently, wherein the support pin includes at least one hole, and when the support pin presses an electrode assembly composed of the anode plate, the cathode plate, and the separator, the corner of the electrode assembly is exposed by the at least one hole and captured by a camera. Claim 2 A stack device according to claim 1, wherein the first support driving unit comprises a first-1 support driving unit that moves the support pin in the X-axis direction and a first-2 support driving unit that moves the support pin in the Y-axis direction. Claim 3 In claim 1, the at least one support unit is a stack device comprising a plurality of support units. Claim 4 A stack device according to paragraph 3, wherein the plurality of support units retract from the stacking stage when an anode plate or a cathode plate is stacked on the stacking stage, and move onto the stacking stage after the anode plate or a cathode plate is stacked to press the anode plate, the cathode plate, and the separator. Claim 5 delete Claim 6 A stack device according to claim 1, wherein the stacking head rotates in a first rotational direction to pick up an anode plate provided by the anode plate supply module and rotates in a second rotational direction different from the first rotational direction to pick up a cathode plate supplied by the cathode plate supply module. Claim 7 In claim 1, the anode plate supply module comprises: a first storage unit in which a plurality of anode plates are stored; a first-1 pickup unit for picking up the anode plates stored in the first storage unit; and a first alignment stage that rotates to provide the anode plates to the stacking head. Claim 8 A stack device according to claim 7, comprising an anode plate inspection unit for inspecting whether an anode plate placed on the first alignment stage is aligned. Claim 9 A stack device according to claim 8, comprising a first transfer unit that transfers the positive plate picked up by the first-1 pickup unit to the positive plate inspection unit. Claim 10 In claim 9, the first transfer unit comprises a rail portion extending in one direction; and a first transfer stage disposed on the rail portion and moving in the direction of extension of the rail portion, and the first transfer stage is a stack device that moves the positive plate to a point where the first alignment stage is disposed. Claim 11 A stack device according to claim 10, comprising a first-2 pickup unit for moving the positive plate of the first transfer stage to the first alignment stage. Claim 12 In claim 8, the anode plate inspection unit comprises a first illumination unit that irradiates light onto the anode plate; and a first camera disposed below the first alignment stage that captures an image of the anode plate, forming a stack device.

Images