Apparatus for manufacturing secondary batteries and method for connecting in-line equipment

Abstract

A secondary battery manufacturing device according to one embodiment of the present invention comprises a plurality of equipment having a plurality of mounting grooves recessed on the outer surface, and a plurality of laser aligners mounted in the mounting grooves of each equipment and arranged to irradiate a laser guide line parallel to the outer surface of the equipment onto the ground on which the equipment is placed, and two adjacent equipments can be connected inline at a position where the marking line marked on the ground and the laser guide line coincide.

Description

Technology Field

[0001] The present invention relates to a secondary battery manufacturing apparatus and a method for connecting inline equipment, and more specifically, to a secondary battery manufacturing apparatus and a method for connecting inline equipment capable of connecting multiple pieces of equipment inline by matching the parallelism and flatness of multiple pieces of equipment for manufacturing secondary batteries. Background Technology

[0002] Figure 1 schematically illustrates the configuration of a secondary battery.

[0003] Referring to FIG. 1, the secondary battery (1) includes an electrode assembly (3), an electrolyte (not shown), and a battery case (2). The electrode assembly (3) is configured such that a negative electrode (8) and a positive electrode (9) are stacked sequentially via a separator (7) to perform charging and discharging of the secondary battery (1).

[0004] The electrolyte (not shown) acts as a medium to allow lithium ions to move between the positive electrode (9) and the negative electrode (8) during charging and discharging of the secondary battery (1), and uses a material with high ion conductivity. The separator (7) is designed to allow only ions to move by physically blocking the positive electrode (9) and the negative electrode (8) from mixing with each other.

[0005] The battery case (2) is a case in which the electrode assembly (3) and the electrolyte (not shown) are housed. After housing the electrode assembly (3) and the electrolyte (not shown), the battery case (2) is sealed by a heat fusion method to seal the electrode assembly (3) and the electrolyte (not shown) within the internal space of the battery case (2).

[0006] Referring to FIG. 2, the manufacturing process of a secondary battery may include an electrode process for producing an electrode for a secondary battery, an assembly process for assembling components of the secondary battery (1), and the manufacturing process of the secondary battery (1) may include an electrode process and an assembly process as a process for manufacturing the secondary battery (1).

[0007] The electrode process is a process for making an electrode substrate. The electrode substrate includes a cathode substrate and an anode substrate.

[0008] The above electrode process includes a mixing process, a coating process, a drying process, a pressing process, a slitting process, and a notching process.

[0009] In the above electrode process, the current collector can be manufactured into a cathode substrate or an anode substrate by passing through inline-connected mixing equipment, coating equipment, drying equipment, rolling equipment, slitting equipment, and notching equipment in a roll-to-roll manner.

[0010] The assembly process is a process for manufacturing a secondary battery (1) including an electrode assembly (3), an electrolyte (not shown), and a battery case (2).

[0011] In the above assembly process, the anode substrate produced in the above electrode process and the anode substrate can be manufactured into an electrode assembly (3) by passing through inline connected lamination equipment, stacking equipment and packaging equipment.

[0012] Multiple pieces of equipment connected in-line are manufactured to have flatness and parallelism. However, as these pieces of equipment are large-scale facilities spanning several meters, it is difficult to transport them to a secondary battery manufacturing plant while connected in-line.

[0013] Accordingly, the aforementioned equipment is transported individually to the secondary battery manufacturing plant and then connected in-line. When connecting multiple pieces of equipment in-line according to the installation manual, it is crucial to ensure that the flatness and parallelism of two adjacent pieces of equipment are aligned.

[0014] Workers measure the design dimensions between the ends of two adjacent pieces of equipment according to the installation manual, and after aligning the flatness and parallelism between the two pieces of equipment based on the measured dimensions, repeat the process of connecting the two pieces of equipment in-line to connect multiple pieces of equipment in-line.

[0015] However, when measuring the spacing and height between the ends of each piece of equipment, measurement errors could occur depending on the operator, making it difficult to achieve parallelism and flatness between the equipment.

[0016] FIG. 3(a) is a diagram showing the arrangement of multiple pieces of equipment when the flatness of multiple pieces of equipment is poor, and FIG. 3(b) is a schematic diagram showing the arrangement of multiple pieces of equipment when the parallelism of multiple pieces of equipment is poor. In FIG. 3, the X-axis direction is the arrangement direction of the multiple pieces of equipment. The Y-axis direction is the width direction of the equipment. The Z-axis direction is the direction perpendicular to the ground.

[0017] As illustrated in FIG. 3(a), when adjusting the flatness, if the ground (G) is not flat, a height difference may occur between the multiple pieces of equipment relocated to the factory.

[0018] Conventionally, the operator individually measured the height of two pieces of equipment (e.g., 10 and 20) relative to the ground (G) according to the installation manual and calculated the height difference between the two pieces of equipment (e.g., 10 and 20). Subsequently, the height of the second piece of equipment (20) placed at the rear end was adjusted based on the first piece of equipment (10) placed at the front end.

[0019] However, conventionally, the height difference between two pieces of equipment was adjusted after measuring the height of the entire equipment relative to the ground, but this can result in measurement errors in centimeters (cm) depending on the operator.

[0020] Even if the measurement error between two adjacent pieces of equipment (e.g., 10 and 20) is not large, if the measurement error between two adjacent pieces of equipment (e.g., 10 and 20) accumulates, a height difference between the last piece of equipment (30) based on the first piece of equipment (10) may occur.

[0021] As shown in FIG. 3(b), misalignment between the equipment may occur during the process of rearranging the plurality of equipment.

[0022] When performing the parallelism adjustment work, the worker measured the length (l) and width (w) of two adjacent pieces of equipment (e.g., 10 and 20) respectively according to the installation manual, calculated the misalignment gap (g1, g2) between the two adjacent pieces of equipment (e.g., 10 and 20), and then performed the work of adjusting the parallelism between the two adjacent pieces of equipment (e.g., 10 and 20).

[0023] Even if the measurement error between two adjacent pieces of equipment (e.g., 10 and 20) is not large, if the measurement error between two adjacent pieces of equipment (e.g., 10 and 20) accumulates, the last piece of equipment (30) may be misaligned from its correct position relative to the first piece of equipment (10).

[0024] In the above electrode process, the inline assembly error of the plurality of equipment (10 to 30) may cause the coating electrode (not shown) to meander. The meandering of the coating electrode (not shown) causes cutting defects in the uncoated portion during the slitting and notching stages of the electrode, which may consequently cause manufacturing defects in the secondary battery (1).

[0025] In the above assembly process, inline assembly errors of the plurality of equipment (10 to 30) may cause stacking defects in the electrode assembly (3). This may consequently cause manufacturing defects in the secondary battery (1).

[0026] Accordingly, it is necessary to develop technology that can connect multiple pieces of equipment (10 to 30) in-line at the correct position. The problem to be solved

[0027] Accordingly, the present invention has been devised to solve the above-mentioned problems and aims to provide a secondary battery manufacturing apparatus capable of generating a laser guideline that is visually recognizable through the laser aligner by modifying the structure of the equipment housing to allow for the mounting of a laser aligner.

[0028] The purpose is to provide a method for connecting inline equipment that allows an operator to align the parallelism of two adjacent pieces of equipment by aligning the laser guide line with a marking line marked on the ground. means of solving the problem

[0029] To achieve the above objectives, a secondary battery manufacturing device according to one embodiment of the present invention may include a plurality of equipment having a plurality of edges, with a mounting groove provided on at least one edge, and configured to perform a manufacturing process of a secondary battery, and a laser aligner configured to be detachably mounted in the mounting groove of each equipment and to irradiate a laser guide line so as to match the orthogonal projection of one edge of the equipment onto the ground on which the equipment is placed.

[0030] The laser aligner may be configured to generate orthogonal laser guide lines that correspond to the orthogonal projections of two edges intersecting at one corner of the equipment.

[0031] The above mounting groove may be provided at the corner where two adjacent edges of the equipment intersect.

[0032] The above mounting grooves are provided in multiple numbers, and the multiple mounting grooves may be provided at each corner in the perimeter direction of the equipment.

[0033] Each facility may include a plurality of leg members that are placed on the ground, a support frame having a plurality of edges that is positioned on the plurality of leg members, and a manufacturing unit positioned on the support frame and configured to perform a manufacturing process of a secondary battery.

[0034] The laser aligner may be configured to project a laser guide line onto the ground on which the equipment is placed so as to match the orthogonal projection of one edge of the support frame.

[0035] The above at least one leg member can be positioned so as not to overlap with the orthogonal projection of the edge.

[0036] A secondary battery manufacturing device according to one embodiment of the present invention includes a marking line marked on the ground to guide the arrangement position of each piece of equipment, and each piece of equipment can be aligned at a position where the laser guide line and the marking line coincide.

[0037] Two adjacent pieces of equipment can be connected in-line in the correct position when aligned with the laser guide line and the marking line.

[0038] The above leg member can be provided to be height-adjustable in a height direction perpendicular to the ground.

[0039] Multiple laser aligners can each be placed in mounting grooves arranged diagonally in the above equipment.

[0040] Multiple laser aligners can be placed at each corner of the above equipment.

[0041] The above equipment is equipped with a height measuring device, and the height measuring device may be configured to measure the height relative to the ground.

[0042] The above height measuring device may be configured so that the measured height is displayed digitally.

[0043] A method for connecting inline equipment according to one embodiment of the present invention may include: a step of marking a marking line on a ground where equipment is installed according to an installation manual; a step of arranging a plurality of pieces of equipment on the ground where the marking line is marked according to an arrangement order; a step of adjusting the position of the first piece of equipment so that the laser guide line of a laser aligner equipped in the first piece of equipment is aligned with the marking line; and a parallelism adjustment step of adjusting the position of the second piece of equipment so that the laser guide line of a laser aligner equipped in the second piece of equipment is aligned with the marking line and the laser guide line of the first piece of equipment, thereby adjusting the parallelism of the second piece of equipment with respect to the first piece of equipment.

[0044] The above parallelism adjustment step can be repeated according to the arrangement order of the equipment. Effects of the invention

[0045] A secondary battery manufacturing device according to one embodiment of the present invention may have the following effects.

[0046] The structure of the equipment housing can be modified to allow for the installation of a laser aligner, and a laser guideline that is visually recognizable can be generated through the laser aligner.

[0047] The operator can align the parallelism of two adjacent pieces of equipment by aligning the laser guide line with the marking line marked on the ground.

[0048] In addition, the operator can accurately recognize the height of the equipment from the height automatically measured by the height measuring device, allowing the flatness of two adjacent pieces of equipment to be aligned more accurately than before in accordance with the installation manual.

[0049] In addition, the operator can intuitively connect two adjacent pieces of equipment in-line at a location where the marking line marked on the ground and the laser guide line irradiated from the equipment coincide, thereby improving the assembly efficiency of the equipment without being affected by the operator's skill level. Brief explanation of the drawing

[0050] Figure 1 is a diagram of a pouch-type secondary battery. Figure 2 is a diagram illustrating the manufacturing process of a secondary battery. FIG. 3(a) is an arrangement diagram of multiple equipment when the flatness of multiple equipment is poor, and FIG. 3(b) is an arrangement diagram of multiple equipment when the parallelism of multiple equipment is poor. FIG. 4 is a configuration diagram of a secondary battery manufacturing apparatus related to one embodiment of the present invention. Figure 5 is an arrangement diagram of multiple pieces of equipment viewed on the XZ plane, and is a diagram for explaining the process of adjusting the flatness of multiple pieces of equipment. Figure 6 is an arrangement diagram of multiple pieces of equipment viewed on an XY plane, and is a diagram for explaining the process of matching the parallelism of multiple pieces of equipment. FIG. 7 schematically illustrates a flowchart of a method for connecting inline equipment according to one embodiment of the present invention. Specific details for implementing the invention

[0051] Hereinafter, with reference to the attached drawings, a secondary battery manufacturing apparatus and a method for connecting inline equipment according to one embodiment of the present invention will be described.

[0052] Before describing the secondary battery manufacturing apparatus of the present invention, the secondary battery manufacturing process is briefly described as follows.

[0053] Figure 1 schematically illustrates the configuration of a secondary battery, and Figure 2 schematically illustrates the flowchart of the manufacturing process of a secondary battery.

[0054] Referring to FIG. 2, the electrode process includes a mixing process, a coating process, a drying process, a pressing process, a slitting process, and a notching process.

[0055] In the mixing process, a slurry containing an electrode active material is prepared. In the coating process, the slurry is applied to a current collector substrate. In the drying process, the slurry dries and adheres to the current collector substrate. In the rolling process, the electrode substrate having the dried coating layer of the slurry is pressure-rolled by a pair of rolling rolls. In the slitting process, the electrode substrate is cut into a unit substrate having one coating layer and two uncoated portions. Then, in the notching process, a lead tab (not shown) and a notching groove (not shown) connected to the coating layer are cut into the uncoated portions of the unit substrate.

[0056] As described above, in the electrode process, the inline assembly error of the plurality of equipment can cause the coating electrode to meander. The meandering of the coating electrode causes cutting defects in the uncoated portion during the slitting and notching stages of the electrode, which can consequently cause manufacturing defects in the secondary battery.

[0057] The assembly process may include a laminating step in which the coated electrode formed with the electrode tab is cut into electrode units for a secondary battery and the electrode (e.g., 8 or 9) is stacked on a separator to form a unit cell, a stacking step in which a plurality of unit cells are stacked to form an electrode assembly, and a packaging step in which the electrode assembly is housed and sealed within a battery case.

[0058] The assembly process is a process for manufacturing a secondary battery (1) comprising an electrode assembly (3), an electrolyte (not shown), and a battery case (2). The assembly process includes a laminating process, a stacking process, and a packaging process.

[0059] In the above assembly process, the electrode substrate unwound into the electrode pancake is cut into an electrode plate having the size of a secondary battery (1), manufactured into a unit cell including an electrode plate and a separator (7), and manufactured into an electrode assembly (3) in which a plurality of unit cells are stacked. Then, the electrode assembly (3) is housed and sealed in a battery case (2) to be manufactured into a secondary battery (1).

[0060] In the laminating process, the electrode substrate unwound from the electrode pancake is cut to the size of a secondary battery (1), and the negative electrode (8) / positive electrode (9) and the separator (7) are laminated to form a monocell (4) or a halfcell (5).

[0061] In the stacking process, a plurality of monocells (4) and one halfcell (5) are stacked to form an electrode assembly (3). The electrode assembly (3) is formed by stacking one halfcell (5) on top of a plurality of monocells (4).

[0062] The above monocell (4) is formed by stacking a separator (7), a cathode (8), a separator (7), and an anode (9) in sequence. The above half cell is formed by stacking a separator (7), a cathode (8), and a separator (7) in sequence.

[0063] In the packaging process, the electrode assembly (3) is housed in a battery case (2). An electrolyte (not shown) is injected into the battery case (2). Subsequently, the battery case (2) is sealed by a heat fusion method to seal the electrode assembly (3) and the electrolyte (not shown).

[0064] In the above assembly process, inline assembly errors of the plurality of equipment may cause stacking defects in the electrode assembly (3). This may consequently cause manufacturing defects in the secondary battery.

[0065] The present invention is implemented to resolve inline connection errors of multiple facilities and can be configured as follows.

[0066] FIG. 4 is a configuration diagram of a secondary battery manufacturing apparatus (1000) related to one embodiment of the present invention.

[0067] Referring to FIG. 4, a secondary battery manufacturing apparatus (1000) according to one embodiment of the present invention may include a plurality of equipment (e.g., 100 to 300) having a plurality of edges, with a mounting groove (e.g., 111 to 114) provided on at least one edge, and configured to perform a secondary battery manufacturing process, and a laser aligner (e.g., 130) configured to be detachably mounted in the mounting groove (e.g., 111 to 114) of each equipment (e.g., 100) and configured to irradiate a laser guide line (L) so as to match the orthogonal projection of one edge of the equipment (e.g., 100) onto a ground (G) on which the equipment (e.g., 100) is placed.

[0068] The manufacturing apparatus (1000) of the secondary battery includes a marking line (M) marked on the ground (G) to guide the arrangement position of each piece of equipment (e.g., 100), and each piece of equipment (e.g., 100) can be aligned at a position where the laser guide line (L) and the marking line (M) coincide. Two pieces of equipment (e.g., 100) adjacent to each other can be connected inline in a fixed position when aligned at a position where the laser guide line (L) and the marking line (M) coincide.

[0069] In FIGS. 4 to 6, the X-axis direction is the arrangement direction of the plurality of equipment. The Y-axis direction is the width direction of the equipment. The Z-axis direction is the direction perpendicular to the ground (G).

[0070] The above plurality of facilities (100, 200) are different facilities. The above facilities (100, 200) are facilities for performing a manufacturing process of a secondary battery.

[0071] For example, in an electrode process, the plurality of facilities (100, 200) may include mixing facilities, coating facilities, drying facilities, rolling facilities, slitting facilities, and notching facilities.

[0072] For example, in the assembly process above, the plurality of facilities (100, 200) may include lamination facilities, stacking facilities and packaging facilities.

[0073] The above equipment (e.g., 100) may include an equipment housing (e.g., 110), a plurality of leg members (e.g., 119), a support frame (117), and a manufacturing unit (not shown).

[0074] The above equipment housing (e.g., 110, 210) may have a structure in which mounting grooves (e.g., 111 to 114, 211 to 214) are provided on the exterior.

[0075] The support frame (117) is the bottom portion of the equipment housing (e.g., 110). The support frame (117) may be placed on the plurality of leg members (e.g., 119). The support frame (117) may have a plurality of edges.

[0076] The plurality of leg members (e.g., 119) are mounted on the support frame (117). The leg members (e.g., 119) may be positioned so as not to overlap with the orthogonal projection of the edge of the support frame (117). The leg members (e.g., 119) may be positioned on the inner side of the edge of the support frame (117). The leg members (e.g., 119) may be provided to be height-adjustable in a height direction perpendicular to the ground (G) (e.g., Z-axis direction).

[0077] The manufacturing unit (not shown) is placed on the support frame (117). The manufacturing unit (not shown) may be installed in the internal space of the equipment housing (110). The manufacturing unit (not shown) is a device provided to perform a manufacturing process of a secondary battery.

[0078] In order to avoid repetition of the explanation below, the shape and arrangement of the mounting grooves (111 to 114) provided in one of the equipment housings (e.g., 110) will be described.

[0079] The above mounting grooves (e.g., 111 to 114) may be formed by being recessed on the outer surface of the above equipment housing (e.g., 110).

[0080] The mounting grooves (e.g., 111 to 114) may be provided at a corner portion (E) where two adjacent edges of the equipment (e.g., 100) intersect. The mounting grooves (e.g., 111 to 114) may be provided at at least one corner portion (E) where two adjacent outer surfaces of the equipment housing (e.g., 110) intersect.

[0081] The plurality of mounting grooves (e.g., 111 to 114) may be spaced apart in the circumferential direction of the equipment housing (e.g., 110). The plurality of mounting grooves (e.g., 111 to 114) may be provided at each corner (E). The mounting grooves (e.g., 111 to 114) may be provided adjacent to the support frame (117) of the equipment housing (e.g., 110).

[0082] The above plurality of mounting grooves (e.g., 111 to 114, 211 to 214) may be provided at the same height (h0) as the support frames (e.g., 117, 217) of two adjacent facilities (e.g., 100, 200). The above mounting grooves (e.g., 111 to 114) may be provided at a position that does not interfere with a manufacturing object passing through the two adjacent facilities (e.g., 100, 200).

[0083] The laser aligner (e.g., 130) may be configured to project a laser guide line (L) onto the ground (G) on which the equipment (e.g., 100) is placed so as to match the orthogonal projection of one edge of the support frame (117).

[0084] The laser aligner (e.g., 130) may be configured to generate an orthogonal laser guide line (L) that corresponds to the orthogonal projections of two edges intersecting at one corner of the equipment (e.g., 100).

[0085] The laser aligner (e.g., 130) may generate the laser guide line (L) so that it intersects perpendicularly in two axes. For example, the laser guide line (L) may be generated so that it intersects perpendicularly in two axes in an XY plane parallel to the ground (G).

[0086] The laser aligner (e.g., 130) can be mounted in the mounting groove (e.g., 111 to 114). The laser aligner (e.g., 130) can be mounted in the mounting groove (e.g., 111 to 114) so ​​that the laser guide line (L) is irradiated toward the ground (G).

[0087] The laser aligner (e.g., 130) can be detachably coupled to the mounting groove (e.g., 111 to 114) with respect to the equipment housing (e.g., 110).

[0088] The laser aligner (e.g., 130) may be configured to project a laser guide line (L) parallel to the outer surface of the equipment onto the ground (G) on which the equipment is placed. The laser aligner (e.g., 130) may be configured to generate orthogonal laser guide lines parallel to each of the two outer surfaces connecting the corner portion (E).

[0089] The laser aligners (e.g., 130) may be arranged to create four laser guide lines (L) parallel to four sides of the equipment (e.g., 100). For example, the plurality of laser aligners (e.g., 130) may be arranged diagonally on the equipment (e.g., 100). Alternatively, the plurality of laser aligners (e.g., 130) may be arranged squarely on the equipment (e.g., 100).

[0090] The above plurality of laser aligners (e.g., 130) may be spaced apart from a plurality of facilities (100, 200, 300) along the arrangement direction of the facilities (e.g., X-axis direction).

[0091] The above laser aligner (e.g., 130, 230) can be mounted on the corner (E) of each of the above equipment (e.g., 100, 200) at a position spaced apart at the same height (h0) as the support frame (e.g., 117, 217) of each of the above equipment (e.g., 100, 200).

[0092] A height measuring device (e.g., 150) may be mounted on the outer surface of the above equipment. The height measuring device (e.g., 150) may be configured to measure the height relative to the ground (G). The height measuring device (e.g., 150) may include a laser distance sensor (not shown). The height measuring device (e.g., 150) may measure the vertical distance relative to the ground (G). The height measuring device (e.g., 150) may be equipped with a display window (not shown) that displays the measured height.

[0093] Figure 5 is an arrangement diagram of multiple facilities viewed on the XZ plane.

[0094] Referring to FIG. 5, the height measuring device (e.g., 150) may be mounted on the outer surface of the equipment adjacent to the support frame of the equipment. The height measuring devices (e.g., 150, 250) mounted on each equipment (100, 200) may be spaced apart at the same height as the support frames (e.g., 117, 217) of each equipment. The height measuring device (e.g., 150) may be configured to display a digitally measured height value.

[0095] In addition, the above equipment (e.g., 100) may have a plurality of leg members (e.g., 119) mounted on the support frame (e.g., 117). The leg members (e.g., 119) may be provided to be height-adjustable in a height direction perpendicular to the ground (G) (e.g., Z-axis direction).

[0096] In the past, a worker measured the height of the equipment relative to the ground (G) using a tool such as a ruler, whereas the present invention can automatically measure the height (h1) of a support frame (e.g., 117) relative to the ground (G) using a height measuring device (e.g., 150), thereby improving the accuracy of the measured height and reducing the measurement time.

[0097] The operator can adjust the height of the equipment to a height that conforms to the installation manual based on the height measured by a height measuring device (e.g., 150).

[0098] In addition, the worker can adjust the height of the equipment (200) placed at the rear end based on the height of the equipment (e.g., 100) placed at the front end, thereby matching the flatness of two adjacent pieces of equipment (e.g., 100 and 200) according to the installation manual.

[0099] Hereinafter, with reference to FIGS. 5 to 7, the process of connecting multiple pieces of equipment (100, 200, 300) inline will be described.

[0100] FIG. 5 is a diagram showing the arrangement of multiple pieces of equipment viewed on the XZ plane, and is a diagram explaining the process of adjusting the flatness of multiple pieces of equipment; FIG. 6 is a diagram showing the arrangement of multiple pieces of equipment viewed on the XY plane, and is a diagram explaining the process of adjusting the parallelism of multiple pieces of equipment; and FIG. 7 is a schematic diagram illustrating the flowchart of a method for connecting inline equipment according to an embodiment of the present invention.

[0101] First, a marking line (M) may be marked on the ground (G) of the factory according to the installation manual of the secondary battery manufacturing device (1000) (S11). The marking line (M) may be a guide line according to the layout of a plurality of facilities (100, 200, 300).

[0102] A plurality of facilities (e.g., 100 to 300) constituting the secondary battery manufacturing device (1000) can be arranged on the ground (G) marked with the marking line (M) in a specific order (S12).

[0103] For convenience of explanation, the multiple facilities (100, 200, 300) will be referred to as the first facility (100) to the third facility (300) according to the arrangement order.

[0104] Since the support frame (117) of a plurality of equipment (e.g., 100 to 300) is spaced apart from the upper part of the ground (G) and the leg member (119) is spaced apart from the edge of the support frame (117), when workers place the plurality of equipment (e.g., 100 to 300) along the marking line (M), a misalignment of several millimeters (mm) to several centimeters (cm) may occur due to an optical illusion.

[0105] The first equipment (e.g., 100) can be positioned so that the laser guide line (L) of the laser aligner (e.g., 130) provided in the first equipment (e.g., 100) is aligned with the marking line (M) (S13).

[0106] The laser guide line (L) is a line that corresponds to the orthogonal projection of the first equipment (e.g., 100). The operator can align the laser guide line (L) with the marking line (M) to align the first equipment (100) in the correct position.

[0107] The position of the first equipment (100) can be adjusted so that the first laser guide line (L1) to the fourth laser guide line (L4) irradiated by the laser aligner (e.g., 130) of the first equipment (100) is aligned with the marking line (M).

[0108] For example, the first laser guideline (L1) and the second laser guideline (L2) may intersect at a right angle in a cross shape. The third laser guideline (L3) and the fourth laser guideline (L4) may intersect at a right angle in a cross shape.

[0109] Next, the position of the second equipment (e.g., 200) is adjusted so that the laser guide line (L) of the laser aligner (e.g., 130) provided in the second equipment (e.g., 200) is aligned with the marking line (M) and the laser guide line (L) of the first equipment (e.g., 100), thereby adjusting the parallelism of the second equipment (e.g., 200) with respect to the first equipment (e.g., 100) (S14).

[0110] The operator can adjust the position of the second facility (200) so that the fifth laser guide line (L5) and the sixth laser guide line (L6) irradiated from the laser aligner (230) of the second facility (200) match the marking line (M).

[0111] The operator can adjust the position of the second equipment (200) so that the fifth laser guideline (L5) is aligned with the second laser guideline (L2) and the sixth laser guideline (L6) is aligned with the fourth laser guideline (L4).

[0112] If the fifth laser guide line (L5) is aligned with the second laser guide line (L2) and the sixth laser guide line (L6) is aligned with the fourth laser guide line (L4), the second equipment (200) can match the parallelism with respect to the first equipment (100).

[0113] The operator can connect the third facility (300) inline to the second facility (200) in the same manner as above.

[0114] The operator can adjust the position of the third facility (300) so that the seventh laser guide line (L7) irradiated from the laser aligner (330) of the third facility (300) is connected in a straight line with the fifth laser guide line (L5) along the marking line (M), and the eighth laser guide line (L8) is connected in a straight line with the sixth laser guide line (6).

[0115] By repeating the above method, the operator can adjust the parallelism of multiple pieces of equipment (e.g., 100 to 300).

[0116] Multiple pieces of equipment (100, 200, 300) can be connected inline at a position where flatness and parallelism match. As a result, the present invention can increase the accuracy of the inline assembly of multiple pieces of equipment (100, 200, 300).

[0117] The operator can align the parallelism of two adjacent pieces of equipment by visually checking the laser guide line (L) of the laser aligner (e.g., 130, 230, 330) without having to measure the width and length of the equipment individually.

[0118] Referring to FIG. 5, the flatness of a plurality of facilities (e.g., 100 to 300) can be adjusted.

[0119] The first facility (100) may have a first height (h1) adjusted according to the installation manual. The first height (h1) may be the height of the support frame (117) of the first facility (100) relative to the ground (G).

[0120] The operator can adjust the height (h2) of the leg member (219) of the second equipment (200) so that the support frame (217) of the second equipment (200) is positioned at the first height (h1), thereby adjusting the flatness of the second equipment (200) relative to the first equipment (100). The operator can precisely adjust the height of the second equipment (200) while checking the height measured by the height measuring device (250) of the second equipment (200).

[0121] Even if the ground (G) is not flat, the worker can adjust the height of the equipment placed at the rear end (e.g., 200) based on the height of the equipment placed at the front end (e.g., 100) to match the flatness between adjacent equipment.

[0122] After the flatness and parallelism of the second facility (200) with respect to the first facility (100) are matched by the above process, the first facility (100) and the second facility (200) can be connected inline (S7).

[0123] The operator can perform the task of matching the parallelism between two pieces of equipment (e.g., 100 and 200, and 200 and 300) more quickly and accurately than conventional methods. As a result, the assembly time between the two pieces of equipment can be reduced.

[0124] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims. Explanation of the symbols

[0125] 1000: Secondary battery manufacturing device 100 to 300: Equipment 110: Equipment Housing 111 to 114: Mounting grooves 117: Support Frame 119: Leg missing 130, 230, 330: Laser Aligner 150, 250: Height measuring device E: Corner M: Marking line L: Laser guideline

Claims

Claim 1 A secondary battery manufacturing apparatus comprising: a plurality of equipment having a plurality of edges, with a mounting groove provided on at least one edge, and configured to perform a manufacturing process of a secondary battery; and a laser aligner detachably mounted in the mounting groove of each equipment and configured to irradiate a laser guide line so as to align with the orthogonal projection of one edge of the equipment onto the ground on which the equipment is placed. Claim 2 A secondary battery manufacturing apparatus according to claim 1, wherein the laser aligner is configured to generate orthogonal laser guide lines that correspond to the orthogonal projections of two edges intersecting at one corner of the equipment. Claim 3 In claim 1, the mounting groove is provided at the corner where two adjacent edges of the equipment intersect, in a secondary battery manufacturing device. Claim 4 In claim 3, the mounting grooves are provided in plurality, and the plurality of mounting grooves are provided at each corner portion in the perimeter direction of the equipment for manufacturing a secondary battery. Claim 5 In claim 3, each piece of equipment comprises a plurality of leg members that are placed on the ground; a support frame disposed on the plurality of leg members and having a plurality of edges; and a manufacturing unit disposed on the support frame and arranged to perform a manufacturing process of a secondary battery. Claim 6 In claim 5, a secondary battery manufacturing apparatus configured such that a laser aligner irradiates a laser guide line to match the orthogonal projection of one edge of the support frame onto the ground on which the equipment is placed. Claim 7 In claim 5, a secondary battery manufacturing apparatus in which at least one leg member is positioned so as not to overlap with the orthogonal projection of the edge. Claim 8 A secondary battery manufacturing apparatus according to claim 5, further comprising a marking line marked on the ground to guide the arrangement position of each piece of equipment, wherein each piece of equipment is aligned at a position where the laser guide line and the marking line coincide. Claim 9 A secondary battery manufacturing apparatus according to claim 8, wherein two adjacent facilities are inline connected in the correct position when the laser guide line and the marking line are aligned. Claim 10 In claim 5, the leg member is a secondary battery manufacturing device configured to be height-adjustable in a height direction perpendicular to the ground. Claim 11 A secondary battery manufacturing apparatus according to claim 1, wherein a plurality of laser aligners are each disposed in mounting grooves arranged diagonally in the equipment. Claim 12 In claim 1, a plurality of laser aligners are arranged at each corner of the equipment in a secondary battery manufacturing device. Claim 13 A secondary battery manufacturing apparatus according to claim 1, wherein the equipment is additionally equipped with a height measuring device, and the height measuring device is configured to measure the height relative to the ground. Claim 14 In claim 13, the height measuring device is a secondary battery manufacturing device configured so that the measured height is displayed digitally. Claim 15 A method for connecting inline equipment, comprising: a step of marking a marking line on a ground where equipment is to be installed according to an installation manual; a step of arranging a plurality of pieces of equipment on the ground where the marking line is marked according to an arrangement order; a step of adjusting the position of the first piece of equipment so that the laser guide line of a laser aligner equipped in the first piece of equipment is aligned with the marking line; and a parallelism adjustment step of adjusting the position of the second piece of equipment so that the laser guide line of a laser aligner equipped in the second piece of equipment is aligned with the marking line and the laser guide line of the first piece of equipment, thereby adjusting the parallelism of the second piece of equipment with respect to the first piece of equipment. Claim 16 A method for connecting inline equipment according to claim 15, characterized in that the parallelism adjustment step is repeated according to the arrangement order of the equipment.

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