Secondary battery manufacturing equipment and method for manufacturing secondary battery

Abstract

According to exemplary embodiments, secondary battery manufacturing equipment is provided. The equipment comprises: a track; a transfer device configured to transfer a jelly roll along the track; a first inspection device configured to inspect the transfer device and the jelly roll; and a first welding device configured to weld a first current collecting plate to the jelly roll inspected by the first inspection device, wherein the first inspection device is configured to inspect alignment between the jelly roll and the transfer device.

Description

Secondary battery manufacturing equipment and method for manufacturing secondary batteries

[0001] The present invention relates to a secondary battery manufacturing facility and a method for manufacturing a secondary battery. The present application claims the benefit of Korean application No. 10-2024-0194523, filed on December 23, 2024, which is incorporated herein by reference in its entirety.

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0003] Secondary batteries are manufactured through electrode, assembly, and activation processes. To improve the yield and reliability of the secondary battery manufacturing process, ensuring process traceability is crucial. Accordingly, various studies are being conducted to ensure the traceability of the secondary battery manufacturing process.

[0004] The problem that the technical concept of the present invention aims to solve is to provide a secondary battery manufacturing facility with enhanced reliability and a method for manufacturing a secondary battery.

[0005] According to exemplary embodiments of the present invention for solving the above-described problem, a secondary battery manufacturing facility is provided. The facility comprises: a track; a conveying device configured to convey a jelly roll along the track; a first inspection device configured to inspect the conveying device and the jelly roll; and a first welding device configured to weld a first current collector plate to the jelly roll inspected by the first inspection device, wherein the first inspection device is configured to inspect the alignment of the jelly roll and the conveying device.

[0006] The first inspection device is configured to determine the alignment between the center of the first mask of the transfer device and the center of the jelly roll.

[0007] The first mask includes first openings that expose the welded portions of the jelly roll, and the first inspection device is configured to determine the center of the first openings as the center of the mask.

[0008] The first mask includes second openings that expose the contour of the jelly roll, and the first inspection device is configured to determine the center of a circle formed by the contour of the jelly roll as the center of the jelly roll.

[0009] The first inspection device is configured to determine the distance between the center of the first mask of the transfer device and the center of the jelly roll.

[0010] The first inspection device is configured to determine that the first mask and the jelly roll are misaligned if the distance between the center of the first mask of the transfer device and the center of the jelly roll is greater than or equal to a reference value.

[0011] The above equipment further comprises: a second inspection device configured to inspect the conveying device and the jelly roll; and a second welding device configured to weld a second collector plate to the jelly roll inspected by the second inspection device, wherein the second inspection device is configured to inspect the alignment of the jelly roll and the conveying device.

[0012] The above facility further includes a maintenance stage connected to the track.

[0013] The above equipment further includes third and fourth inspection devices configured to inspect the transfer device on the repair stage.

[0014] The third and fourth inspection devices are configured to inspect the transfer device in a state where the inspection roll is loaded.

[0015] The dimensions of the above inspection roll are the same as the dimensions of the above jelly roll.

[0016] According to exemplary embodiments, a method for manufacturing a secondary battery is provided. The method comprises the steps of: loading a jelly roll onto a transfer device; and inspecting the jelly roll and the transfer device, wherein, in the step of inspecting the jelly roll and the transfer device, an alignment is determined between the center of a first mask of the transfer device and the center of the jelly roll.

[0017] The first mask includes first openings that expose the welded portions of the jelly roll, and the center of the first openings is determined as the center of the mask.

[0018] The first mask includes second openings that expose the contour of the jelly roll, and the center of the circle formed by the contour of the jelly roll is determined to be the center of the jelly roll.

[0019] If the distance between the center of the first mask of the above-mentioned transfer device and the center of the above-mentioned jelly roll is greater than or equal to a reference value, the first mask and the jelly roll are determined to be misaligned.

[0020] According to exemplary embodiments of the present invention, a secondary battery manufacturing facility is provided that includes an inspection device configured to automatically determine misalignment of a conveying device configured to convey a jelly roll. Accordingly, the time and resources required for the maintenance of the conveying device can be reduced.

[0021] The effects obtainable from the exemplary embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from the implementation of the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0022] FIG. 1 is a drawing showing a secondary battery manufacturing facility according to exemplary embodiments.

[0023] FIG. 2 shows a transfer device according to exemplary embodiments.

[0024] Figure 3 shows the Field of View (FOV) of the first inspection device.

[0025] Figure 4 shows the FOV of the second inspection device.

[0026] FIG. 5 is a flowchart illustrating a method for manufacturing a secondary battery according to exemplary embodiments.

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0028] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0029] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0030] Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0031] (1st embodiment)

[0032] FIG. 1 is a drawing showing a secondary battery manufacturing facility (100) according to exemplary embodiments.

[0033] FIG. 2 shows a transfer device (120) according to exemplary embodiments.

[0034] Figure 3 shows the Field of View (FOV) of the first inspection device (131).

[0035] Figure 4 shows the FOV of the second inspection device (133).

[0036]

[0037] Referring to FIGS. 1 to 4, a secondary battery manufacturing facility (100) may be configured to perform a secondary battery manufacturing process. The secondary battery manufacturing facility (100) may include a track (110), transfer devices (120), a first inspection device (131), a second inspection device (133), a third inspection device (135), a fourth inspection device (137), a first welding device (141), a second welding device (143), a supply device (150), a discharge device (160), and a repair stage (170).

[0038]

[0039] The secondary battery manufacturing facility (100) may be configured to perform, for example, an assembly process. More specifically, the secondary battery manufacturing facility (100) may be configured to combine a first current collector plate and a second current collector plate on a jelly roll (JR).

[0040] The positive current collector plate (PC) and the negative current collector plate (NC) can be joined to the jelly roll (JR) by laser welding. The negative current collector plate (NC) can be joined to the jelly roll (JR) after the positive current collector plate (PC) is joined to the jelly roll (JR), but is not limited thereto. The positive current collector plate (PC) can also be joined to the jelly roll (JR) after the negative current collector plate (NC) is joined to the jelly roll (JR).

[0041]

[0042] The jelly roll (JR) may include a wound structure of an anode, a cathode, and a separator. The anode may include an anode current collector and an anode active material, and the cathode may include a cathode current collector and a cathode active material.

[0043] The thickness of the positive current collector may be in the range of about 3 μm to about 500 μm. The positive current collector may not cause chemical changes in the secondary battery finally manufactured and may have high conductivity. The positive current collector may include, for example, stainless steel, nickel, titanium, calcined carbon, and aluminum. The positive current collector may also include stainless steel surface-treated with carbon, nickel, titanium, silver, etc. The surface of the positive current collector may include a micro-roughness structure to increase the adhesion of the active material. The positive current collector may have the shape of a film, sheet, foil, net, porous material, foam, nonwoven fabric, etc.

[0044] The cathode active material is a material capable of causing an electrochemical reaction. The cathode active material may be a lithium transition metal oxide. The cathode active material may be, for example, a layered compound such as lithium cobalt oxide (LiCoO2) and lithium nickel oxide (LiNiO2) substituted with one or more transition metals, lithium manganese oxide substituted with one or more transition metals, or a material with the chemical formula LiNi 1-y M y A lithium nickel-based oxide represented by O2 (where M is any one of Co, Mn, Al, Cu, Fe, Mg, B, Cr, Zn, and Ga, and 0.01≤y≤0.7), Li 1+z Ni 1 / 3 Co 1 / 3 Mn 1 / 3 O2, Li 1+zN i 0.4 Mn 0.4 Co 0.2 Li like O2 1+z Ni b Mn c Co 1-(b+c+d) M d O (2-e) A eA lithium nickel cobalt manganese composite oxide represented by the formula Li, where -0.5≤z≤0.5, 0.1≤b≤0.8, 0.1≤c≤0.8, 0≤d≤0.2, 0≤e≤0.2, b+c+d<1, M is any one of Al, Mg, Cr, Ti, Si, and Y, and A is any one of F, P, and Cl. 1+x M 1-y M' y PO 4-z X z It may include an olivine-based lithium metal phosphate represented as (wherein M is a transition metal, more specifically one of Fe, Mn, Co and Ni, M' is one of Al, Mg and Ti, X is one of F, S and N, -0.5≤x≤+0.5, 0≤y≤0.5, and 0≤z≤0.1).

[0045] The thickness of the negative current collector may be in the range of about 3 μm to about 500 μm. The negative current collector may not cause chemical changes in the secondary battery finally manufactured and may have high conductivity. The negative current collector may include copper, stainless steel, aluminum, nickel, titanium, calcined carbon, and aluminum-cadmium alloy. The negative current collector may also include stainless steel surface-treated with carbon, nickel, titanium, silver, etc. The surface of the negative current collector may include a micro-roughness structure to increase the adhesion of the active material. The negative current collector may have the shape of a film, sheet, foil, net, porous material, foam, nonwoven fabric, etc.

[0046] The negative electrode active material may include carbon, for example, non-graphitizable carbon, graphite-based carbon, etc. The negative electrode active material is, for example, Li x Fe2O3(0≤x≤1), LixWO2(0≤x≤1), Sn x Me 1-x Me y O z(Here, Me is any one of Mn, Fe, Pb, and Ge, and Me' is any one of Al, B, P, Si, Group 1, Group 2, and Group 3 elements of the periodic table and halogens, and 0 <x≤1 이고, 1≤y≤3 이며, 1≤z≤8) 등의 금속 복합 산화물을 포함할 수 있다. 음극 활물질은, 예컨대, 리튬 금속, 리튬 합금, 규소계 합금, 주석계 합금을 포함할 수 있다. 음극 활물질은, 예컨대, SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, Bi2O5등의 금속 산화물을 포함할 수 있다. 음극 활물질은, 예컨대, 폴리아세틸렌 등의 도전성 고분자, Li-Co-Ni 계 재료 등을 포함할 수 있다.

[0047]

[0048] A jelly roll tray loaded with jelly rolls (JR) can be delivered from an automated logistics system to a secondary battery manufacturing facility (100). The jelly roll tray can be delivered from a jelly roll warehouse. The jelly rolls (JR) can be loaded from the jelly roll tray to a transfer device (120) of the secondary battery manufacturing facility (100) by a supply device (150). The supply device (150) may include, but is not limited to, a pick-and-place machine.

[0049]

[0050] Each of the transfer devices (120) may be configured to move along a track (110). The track (110) may include a closed path. The transfer devices (120) may form a Linear Motion System (LMS) together with the track (110). Each of the transfer devices (120) may include a base (121), a jig (123), a first mask (125), and a second mask (127).

[0051] In the following, the direction of movement of the transfer device (120) is defined as the X direction, the axial direction of the jelly roll (JR) is defined as the Y direction, and a direction substantially perpendicular to each of the X direction and the Y direction is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other.

[0052]

[0053] The base (121) can be coupled to the track (110). The base (121) can support the jig (123), the first mask (125), and the second mask (127). The jig (123) can be configured to secure the jelly roll (JR).

[0054] The first mask (125) may include a slot (125SL), first openings (125OP1), and second openings (125OP2) that partially expose the jelly roll (JR). The slot (125SL) may have a roughly straight shape. The slot (125SL) may expose the contour (JRC) and welds of the jelly roll (JR). The first openings (125OP1) may expose the welds of the jelly roll (JR). Here, the welds of the jelly roll (JR) are the parts of the jelly roll (JR) to be welded with the first current collector plate (CL1). The second openings (125OP2) may expose the contour (JRC) of the jelly roll (JR).

[0055] The first openings (125OP1) may be symmetric with respect to the slot (125SL). The second openings (125OP2) may be symmetric with respect to the slot (125SL). The distance between the center (125C) of the first mask (125) and each of the first openings (125OP1) may be different from the distance between the center (125C) of the mask (125) and each of the second openings (125OP2). The distance between the center (125C) of the first mask (125) and each of the first openings (125OP1) may be smaller than the distance between the center (125C) of the first mask (125) and each of the second openings (125OP2).

[0056] The second mask (127) may include a slot (127SL), first openings (127OP1), and second openings (127OP2) that partially expose the jelly roll (JR). The slot (127SL) may have a roughly straight shape. The slot (127SL) may expose the contour (JRC) and welds of the jelly roll (JR). The first openings (127OP1) may expose the welds of the jelly roll (JR). Here, the welds of the jelly roll (JR) are parts of the jelly roll (JR) to be welded with the second current collector plate (CL2). The second openings (127OP2) may expose the contour (JRC) of the jelly roll (JR).

[0057] The first openings (127OP1) may be symmetric with respect to the slot (127SL). The second openings (127OP2) may be symmetric with respect to the slot (127SL). The distance between the center (127C) of the mask (127) and each of the first openings (127OP1) may be different from the distance between the center (127C) of the mask (127) and each of the second openings (127OP2). The distance between the center (127C) of the mask (127) and each of the first openings (127OP1) may be smaller than the distance between the center (127C) of the mask (127) and each of the second openings (127OP2).

[0058] The shape and arrangement of the first openings (125OP1) may differ from, but are not limited to, the shape and arrangement of the first openings (127OP1). The shape and arrangement of the first openings (125OP1) may be the same as the shape and arrangement of the first openings (127OP1).

[0059] The shape and arrangement of the second openings (125OP2) may differ from, but are not limited to, the shape and arrangement of the second openings (127OP2). The shape and arrangement of the second openings (125OP2) may be the same as the shape and arrangement of the second openings (127OP2).

[0060]

[0061] After the jelly roll (JR) is loaded onto the transfer device (120), the transfer device (120) can move to the FOV of the first inspection device (131). The first inspection device (131) may include an image sensor configured to generate an image including the jelly roll (JR) and the transfer device (120), and a processor configured to analyze the image. The image sensor and the processor may constitute a vision machine.

[0062] The first inspection device (131) may be configured to inspect the jelly roll (JR) and the transfer device (120). The first inspection device (131) may be configured to inspect the alignment of the jelly roll (JR) with respect to the transfer device (120).

[0063] The first inspection device (131) may be configured to determine the center (131CF) of the FOV of the first inspection device (131). The first inspection device (131) may be configured to determine the center (131CF) of the FOV of the first inspection device (131) using a first reference mark (131R).

[0064] The first inspection device (131) may be configured to determine the center (CJ) of the jelly roll (JR). The first inspection device (131) may be configured to derive a circle from the contour of the jelly roll (JR) exposed through the second openings (125OP2) and to determine the center of the circle as the center (CJ) of the jelly roll (JR).

[0065] The first inspection device (131) may be configured to determine the center (125C) of the first mask (125). The first inspection device (131) may be configured to determine the center of the first openings (125OP1) of the first mask (125) as the center (125C) of the first mask (125).

[0066] The first inspection device (131) may be configured to measure the distance between the center (131CF), the center (CJ), and the center (125C). The first inspection device (131) may be configured to determine the alignment between the jelly roll (JR) and the conveying device (120) based on the distance between the center (131CF), the center (CJ), and the center (125C).

[0067] If, as a result of inspection by the first inspection device (131), the jelly roll (JR) and the transfer device (120) are properly aligned, the transfer device (120) can move to a position (i.e., near the first welding device (141)) for processing the jelly roll (JR) with the first welding device (141).

[0068] The first welding device (141) may be configured to weld the jelly roll (JR) and the first current collector plate (CL1) together. The first welding device (141) may be configured to weld the jelly roll (JR) and the first current collector plate (CL1) together, for example, using a laser beam. The first welding device (141) may be configured to irradiate a laser beam onto parts of the first current collector plate (CL1) exposed by the slot (125SL) and the first openings (125OP1) so that the jelly roll (JR) and the first current collector plate (CL1) are welded together.

[0069] After the first collector plate (CL1) is welded to the jelly roll (JR), the transfer device (120) can move to the FOV of the second inspection device (133). The second inspection device (133) may include an image sensor configured to generate an image including the jelly roll (JR) and the transfer device (120), and a processor configured to analyze the image. The image and the processor may constitute a vision machine.

[0070] The second inspection device (133) may be configured to inspect the jelly roll (JR) and the transfer device (120). The second inspection device (133) may be configured to inspect the alignment of the jelly roll (JR) with respect to the transfer device (120).

[0071] The second inspection device (133) may be configured to determine the center (133CF) of the FOV of the second inspection device (133). The second inspection device (133) may be configured to determine the center (133CF) of the FOV of the second inspection device (133) using a third reference mark (133R).

[0072] The second inspection device (133) may be configured to determine the center (CJ) of the jelly roll (JR). The second inspection device (133) may be configured to derive a circle from the contour of the jelly roll (JR) exposed through the second openings (127OP2) and to determine the center of the circle as the center (CJ) of the jelly roll (JR).

[0073] The second inspection device (133) may be configured to determine the center (127C) of the second mask (127). The second inspection device (133) may be configured to determine the center of the first openings (127OP1) of the second mask (127) as the center (127C) of the second mask (127).

[0074] The second inspection device (133) may be configured to measure the distance between the center (133CF), the center (CJ), and the center (127C). The second inspection device (133) may be configured to determine the alignment between the jelly roll (JR) and the conveying device (120) based on the distance between the center (133CF), the center (CJ), and the center (127C).

[0075] If, as a result of inspection by the second inspection device (133), the jelly roll (JR) and the transfer device (120) are properly aligned, the transfer device (120) can be moved to a position (i.e., near the second welding device (143)) for processing the jelly roll (JR) with the second welding device (143).

[0076] The image sensor of each of the first and second inspection devices (131, 133) may include either a CMOS image sensor or a CCD camera. The processor of each of the first and second inspection devices (131, 133) may be implemented in hardware, firmware, software, or a combination thereof. For example, the processor may include a computing device such as a workstation computer, a desktop computer, a laptop computer, or a tablet computer. The processor may include any one of a simple controller, a complex processor such as a microprocessor, a CPU, a GPU, etc., a processor configured by software, dedicated hardware, and firmware. The processor may be implemented by, for example, a general-purpose computer or by application-specific hardware such as a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), and an Application Specific Integrated Circuit (ASIC).

[0077] The operation of the processor may be implemented as instructions stored on a machine-readable medium that can be read and executed by one or more processors. Here, the machine-readable medium may include any mechanism for storing and / or transmitting information in a form readable by a machine (e.g., a computing device). For example, the machine-readable medium may include Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage medium, optical storage medium, flash memory, electrical, optical, acoustic, or other forms of radio signals (e.g., carrier waves, infrared signals, digital signals, etc.) and any other signals.

[0078] The processor may be composed of firmware, software, routines, and instructions for performing the aforementioned operation or any process described below. For example, the processor may be implemented (instantiated) in memory.

[0079] The second welding device (143) may be configured to weld the jelly roll (JR) and the first current collector plate (CL1) together. The second welding device (143) may be configured to weld the jelly roll (JR) and the second current collector plate (CL2) together, for example, using a laser beam. The second welding device (143) may be configured to irradiate a laser beam onto portions of the second current collector plate (CL2) exposed by the slot (127SL) and the first openings (127OP1) so that the jelly roll (JR) and the second current collector plate (CL2) are welded together. Accordingly, an electrode assembly (EA) composed of the jelly roll (JR), the first current collector plate (CL1), and the second current collector plate (CL2) may be provided.

[0080] The secondary battery manufacturing facility (100) may further include an additional inspection device for inspecting the welding condition of the first current collector plate (CL1) and the jelly roll (JR) and an additional inspection device for inspecting the welding condition of the second current collector plate (CL2) and the jelly roll (JR).

[0081] After the first and second current collector plates (CL1, CL2) are welded to the jelly roll (JR), the electrode assembly (EA) can be discharged by the discharge device (160) for a subsequent process. The discharge device (160) may include a pick-and-place machine. The electrode assembly (EA) can be unloaded from the transfer device (120) by the discharge device (160) and loaded onto a carrier (not shown).

[0082] If the inspection result by the first inspection device (131) or the inspection result by the second inspection device (133) is defective, the transfer device (120) may move to a repair stage (170). At the repair stage (170), repairs to the transfer device (120) may be performed. The repair stage (170) may be coupled to the track (110).

[0083] The transfer device (120) transferred to the repair stage (170) can be repaired by a worker or automated equipment. The transfer device (120) can be repaired based on the distance between the center (125C) and the center (CJ).

[0084] The third and fourth inspection devices (135, 137) may be adjacent to the repair stage (170). The third and fourth inspection devices (135, 137) may be configured to inspect the transfer device (120) on the repair stage (170). The operation of the third inspection device (135) may be substantially the same as the operation of the first inspection device (131). The operation of the fourth inspection device (137) may be substantially the same as the operation of the second inspection device (133). For inspection by the third and fourth inspection devices (135, 137), an inspection roll (IR) may be loaded onto the transfer device (120) of the repair stage (170). The inspection roll (IR) may have substantially the same dimensions as the jelly roll (JR) and may replace the jelly roll (JR).

[0085] According to exemplary embodiments, in addition to the case where the transfer device (120) and the jelly roll (JR) are determined to be misaligned by the first inspection device (131) or the second inspection device (133), if the transfer device (120) causes more than a set number of defects or if the transfer device (120) causes more than a set frequency of defects, the transfer device (120) may move to a repair stage (170).

[0086]

[0087] (2nd Example)

[0088] FIG. 5 is a flowchart illustrating a method for manufacturing a secondary battery according to exemplary embodiments.

[0089] Referring to FIGS. 1 to 5, a jelly roll (JR) can be loaded into a transfer device (120) at P110. The jelly roll (JR) can be loaded into the transfer device (120) by a supply device (150).

[0090]

[0091] Next, at P120, the jelly roll (JR) and the transfer device (120) can be inspected. The jelly roll (JR) and the transfer device (120) can be inspected by the first inspection device (131). The image sensor of the first inspection device (131) can be configured to capture an image including a reference mark (131R), a first mask (125), and the jelly roll (JR), as shown in FIG. 3.

[0092] The processor of the first inspection device (131) may be configured to determine the center (125C) of the first mask (125) from the first openings (125OP1). The first openings (125OP1) of the first mask (125) may be symmetrical with respect to the center (125C) of the first mask (125), and accordingly, the center (125C) of the first mask (125) may be determined as the center of the first openings (125OP1).

[0093] The processor of the first inspection device (131) may be configured to determine the center of the jelly roll (JR) from the contour (JRC) of the jelly roll (JR). The processor of the first inspection device (131) may be configured to determine a circle formed by the contour (JRC) of the jelly roll (JR) and to determine the center of the circle as the center (CJ) of the jelly roll (JR).

[0094] The processor of the first inspection device (131) may be configured to determine the center (131CF) of the FOV of the first inspection device (131) from the position of the reference mark (131R). The center (131CF) of the FOV of the first inspection device (131) may be determined by projecting the center of the reference mark (131R) in the Z direction so that it has the same Z direction position as the center (125C) of the first mask (125).

[0095] In P120, if the first mask (125) and the jelly roll (JR) are aligned (G), in P130, the first current collector plate (CL1) can be welded to the jelly roll (JR). The first current collector plate (CL1) can be welded to the jelly roll (JR) by the first welding device (141). In P120, if the first mask (125) and the jelly roll (JR) are misaligned (NG), in P160, the transfer device (120) can be transferred to the repair stage (170).

[0096] Here, alignment and misalignment of the first mask (125) and the jelly roll (JR) may be based on the distance between the center (125C) and the center (CJ). If the distance between the center (125C) and the center (CJ) is less than a reference value, the first mask (125) and the jelly roll (JR) may be determined to be aligned. If the distance between the center (125C) and the center (CJ) is greater than or equal to a reference value, the first mask (125) and the jelly roll (JR) may be determined to be misaligned.

[0097]

[0098] Next, at P140, the jelly roll (JR) and the transfer device (120) can be inspected. The jelly roll (JR) and the transfer device (120) can be inspected by a second inspection device (133). The image sensor of the second inspection device (133) can be configured to capture an image including a reference mark (133R), a second mask (127), and the jelly roll (JR), as shown in FIG. 3.

[0099] The processor of the second inspection device (133) may be configured to determine the center (127C) of the second mask (127) from the first openings (127OP1). The first openings (127OP1) of the second mask (127) may be symmetrical with respect to the center (127C) of the second mask (127), and accordingly, the center (127C) of the second mask (127) may be determined as the center of the first openings (127OP1).

[0100] The processor of the second inspection device (133) may be configured to determine the center of the jelly roll (JR) from the contour (JRC) of the jelly roll (JR). The processor of the second inspection device (133) may be configured to determine a circle formed by the contour (JRC) of the jelly roll (JR) and to determine the center of the circle as the center (CJ) of the jelly roll (JR).

[0101] The processor of the second inspection device (133) may be configured to determine the center (131CF) of the FOV of the second inspection device (133) from the position of the reference mark (133R). The center (133CF) of the FOV of the second inspection device (133) may be determined by projecting the center of the reference mark (133R) in the Z direction so that it has the same Z direction position as the center (127C) of the second mask (127).

[0102] In P140, if the second mask (127) and the jelly roll (JR) are aligned (G), in P150, the second current collector plate (CL2) can be welded to the jelly roll (JR). The second current collector plate (CL2) can be welded to the jelly roll (JR) by the second welding device (143). In P140, if the second mask (127) and the jelly roll (JR) are misaligned (NG), in P160, the transfer device (120) can be transferred to the repair stage (170).

[0103] Here, alignment and misalignment of the second mask (127) and the jelly roll (JR) may be based on the distance between the center (127C) and the center (CJ). If the distance between the center (127C) and the center (CJ) is less than a reference value, the second mask (127) and the jelly roll (JR) may be determined to be aligned. If the distance between the center (127C) and the center (CJ) is greater than or equal to a reference value, the second mask (127) and the jelly roll (JR) may be determined to be misaligned.

[0104] The transfer device (120) transferred to the repair stage (170) may be repaired by a worker or automated equipment. The transfer device (120) may be repaired based on the distance between the center (125C) and the center (CJ). The transfer device (120) may also be repaired based on the distance between the center (127C) and the center (CJ). The transfer device (120) may also be repaired based on the inspection results of the third and fourth inspection devices (135, 137).

[0105]

[0106] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. Track; A conveying device configured to convey a jelly roll along the above track; A first inspection device configured to inspect the above-mentioned transfer device and the above-mentioned jelly roll; and It includes a first welding device configured to weld a first collector plate to the jelly roll inspected by the first inspection device, and A secondary battery manufacturing facility characterized by the first inspection device being configured to inspect the alignment of the jelly roll and the transfer device.

2. In Paragraph 1, A secondary battery manufacturing facility characterized by the first inspection device being configured to determine the alignment between the center of the first mask of the transfer device and the center of the jelly roll.

3. In Paragraph 2, The first mask includes first openings that expose the welded portions of the jelly roll, and A secondary battery manufacturing facility characterized by the first inspection device being configured to determine the center of the first openings as the center of the mask.

4. In Paragraph 2, The first mask includes second openings that expose the contour of the jelly roll, and A secondary battery manufacturing facility characterized by the above-mentioned first inspection device being configured to determine the center of a circle formed by the contour of the above-mentioned jelly roll as the center of the above-mentioned jelly roll.

5. In Paragraph 2, A secondary battery manufacturing facility characterized by the first inspection device being configured to determine the distance between the center of the first mask of the transfer device and the center of the jelly roll.

6. In Paragraph 2, A secondary battery manufacturing facility characterized by the first inspection device being configured to determine that the first mask and the jelly roll are misaligned if the distance between the center of the first mask of the transfer device and the center of the jelly roll is greater than or equal to a reference value.

7. In Paragraph 1, A second inspection device configured to inspect the above transfer device and the above jelly roll; and It further includes a second welding device configured to weld a second collector plate to the jelly roll inspected by the second inspection device, and A secondary battery manufacturing facility characterized by the above-mentioned second inspection device being configured to inspect the alignment of the jelly roll and the transfer device.

8. In Paragraph 1, A secondary battery manufacturing facility further comprising a maintenance stage connected to the above track.

9. In Paragraph 8, A secondary battery manufacturing facility further comprising third and fourth inspection devices configured to inspect the transfer device on the repair stage.

10. In Paragraph 9, A secondary battery manufacturing facility characterized in that the above third and fourth inspection devices are configured to inspect the transfer device in a state where the inspection roll is loaded.

11. In Paragraph 10, A secondary battery manufacturing facility characterized in that the dimensions of the inspection roll are the same as the dimensions of the jelly roll.

12. A step of loading the jelly roll onto a transfer device; and The method includes the step of inspecting the jelly roll and the transfer device. A method for manufacturing a secondary battery characterized by determining the alignment between the center of the first mask of the transfer device and the center of the jelly roll during the step of inspecting the jelly roll and the transfer device.

13. In Paragraph 12, The first mask includes first openings that expose the welded portions of the jelly roll, and A method for manufacturing a secondary battery characterized in that the center of the first openings is determined as the center of the mask.

14. In Paragraph 12, The first mask includes second openings that expose the contour of the jelly roll, and A method for manufacturing a secondary battery characterized in that the center of the circle formed by the contour of the jelly roll is determined to be the center of the jelly roll.

15. In Paragraph 12, A method for manufacturing a secondary battery characterized by determining that the first mask and the jelly roll are misaligned when the distance between the center of the first mask of the transfer device and the center of the jelly roll is greater than or equal to a reference value.

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