Pouch film supply device for secondary batteries

Abstract

The pouch film supplying device for secondary batteries of the present invention includes a plurality of first guide rollers that are installed at a distance between a pouch film input section and a discharge section, guide the pouch film, and have one side fixedly supported, a plurality of second guide rollers that are installed at a distance below the first guide rollers between the pouch film input section and the discharge section, and guide the pouch film, and a tilt measuring member that is provided on the other side of the first guide rollers and measures at least one of the up-down tilt and the left-right tilt of the first guide roller.

Description

[Technical Field]

[0001] The present invention relates to a pouch film supplying device for a secondary battery.

[0002] More specifically, the present invention relates to a pouch film supply device that can prevent the pouch film from meandering by measuring the inclination of the guide roller that guides the pouch film, managing the inclination of the guide roller, and adjusting the inclination when necessary.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0166330, dated December 2, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference. [Background technology]

[0004] A pouch-type secondary battery is manufactured by housing an electrode assembly in a pouch-shaped battery case formed from a pouch film.

[0005] The pouch-type battery case is easily deformable and can be manufactured in various shapes, and is lightweight, allowing the battery to have an increased energy density per unit weight. The pouch film may include an outer coating layer, a metal barrier layer, and an inner sealant layer.

[0006] FIG. 1 shows a typical molding device for pouch-type battery cases.

[0007] As shown in the figure, a pouch film 1 is supplied to a pouch forming section 20 by a pouch film supplying device 10 equipped with a number of guide rollers R1, R2, and R3, and is formed into a pouch-shaped case 2 of a predetermined shape in the pouch forming section 20.

[0008] In order to improve the processing precision of the pouch-shaped cases in the pouch-forming unit 20, the pouch film 1 supplied to the pouch-forming unit 20 must maintain a correct path while traveling. If the pouch film travels in a meandering manner, defects will occur in the pouch-shaped cases 2 processed in the pouch-forming unit 20.

[0009] However, among the multiple guide rollers provided in the pouch film supplying device 10, the upper guide rollers are cantilever-type and fixedly supported on only one side, which can cause the roller portion on the other side, which is not fixedly supported, to bend downward. Another problem is that the extension direction of the rollers can be tilted left and right. That is, the guide rollers are tilted up and down or left and right, and the degree of this tilt varies slightly from guide roller to guide roller. This causes the travel path of the pouch film 1 guided along the multiple guide rollers to become uneven. As a result, the pouch film supplied through the pouch film supplying device 10 runs in a meandering manner, increasing the possibility of defects occurring in the pouch forming unit 20.

[0010] Meanwhile, an event may occur in a cutting section or forming section downstream of the pouch film supplying device, interrupting the entire pouch film processing process. Alternatively, the processing process may be interrupted to change the pouch film. In this case, the entire subsequent pouch film supplying process is also interrupted, resulting in a decrease in productivity. In this case, if the pouch film supplying device can ensure a sufficient pouch film travel path, even if an event occurs in a subsequent processing process, the time required for the travel can be used to secure maintenance time or pouch film replacement time in the subsequent process.

[0011] Therefore, there is a need for the development of a technique that can manage the inclination of the guide rollers in a pouch film supplying device and adjust it uniformly.

[0012] In addition, there is a need for the development of a technology that can ensure the continuity of subsequent processes and increase work productivity even if a part of the pouch film supply and processing process is interrupted. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Korean Patent Publication No. 10-2022-0092310 Summary of the Invention [Problem to be solved by the invention]

[0014] The present invention has been devised to solve the above-mentioned problems, and aims to measure and monitor the inclination of the guide roller that guides the pouch film, thereby managing the inclination of the guide roller so as to prevent the pouch film from meandering.

[0015] Another object of the present invention is to provide a pouch film supplying device that can reliably prevent the pouch film from meandering by adjusting the inclination of the guide rollers based on the measured inclination.

[0016] Another object of the present invention is to provide a pouch film supplying device that can adjust the travel path of the pouch film by raising the guide roller, thereby ensuring maintenance time even if a problem occurs in the pouch film processing process, etc., and allowing the pouch film supplying process to be carried out without interruption. [Means for solving the problem]

[0017] To solve the above problem, the pouch film supply device for secondary batteries of the present invention includes a plurality of first guide rollers that are installed at a distance between a pouch film input section and an output section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are installed at a distance below the first guide rollers between the pouch film input section and the output section, and guide the pouch film; and an inclination measuring member that is provided on the other side of the first guide rollers and measures at least one of the up-down inclination and the left-right inclination of the first guide roller.

[0018] The pouch film is alternately guided by the first guide roller and the second guide roller, and can form a zigzag traveling path between the pouch film input section and the pouch film discharge section.

[0019] Both sides of the second guide rollers may be fixedly installed below the first guide rollers, and at least one of the first guide rollers may be installed to be able to move up and down relative to the second guide rollers.

[0020] The first guide roller may include a roller portion extending across the guide direction of the pouch film to guide the pouch film, bearing portions installed on both sides of the roller portion, a first extension rod protruding from the bearing portion to one side of the first guide roller and fixedly supported, and a second extension rod protruding from the other side of the first guide roller.

[0021] The tilt measuring member may be mounted on the second extension rod.

[0022] The inclination measuring member may include at least one of a first inclination measuring member that measures the up-down inclination of the first guide roller and a second inclination measuring member that measures the left-right inclination of the first guide roller.

[0023] The pouch film supplying device of the present invention may further include an inclination adjusting member that adjusts at least one of the vertical inclination and the horizontal inclination of the first guide roller.

[0024] The pouch film supply device of the present invention may further include a support frame installed below the first guide roller in parallel with the extension direction of the first guide roller, one side of which is fixedly supported on the same side as the one side of the first guide roller, and the other side of which supports the other side of the first guide roller.

[0025] The tilt adjustment member may be located on the other side of the support frame.

[0026] An upward extension bent upward toward the first guide roller may be provided at an end of the other side of the support frame, and an installation groove in which an extension rod of the first guide roller is placed may be provided at an upper portion of the upward extension.

[0027] In one embodiment, a height adjusting bolt may be installed through the upward extension at the bottom of the installation groove to support the other side end of the first guide roller in the vertical direction and adjust the height.

[0028] In another embodiment, a left / right inclination adjustment bolt may be installed through the left and right side walls of the upward extension portion of the installation groove to support the other side end of the first guide roller in the left / right direction and adjust the position in the left / right direction.

[0029] The pouch film supply device of the present invention may further include a monitoring unit connected to the inclination measuring member and monitoring at least one of the vertical inclination and the horizontal inclination of the first guide roller measured by the inclination measuring member, and an inclination adjusting member adjusting at least one of the vertical inclination and the horizontal inclination of the first guide roller.Therefore, when the vertical inclination or the horizontal inclination of the first guide roller monitored by the monitoring unit is outside a set range, the inclination adjusting member may adjust at least one of the vertical inclination and the horizontal inclination of the first guide roller.

[0030] In another embodiment, the pouch film supply device for secondary batteries includes a lifting frame to which one side of at least one of the plurality of first guide rollers is fixedly supported, a driving unit for raising and lowering the lifting frame, and a lifting guide extending in the vertical direction to guide the lifting and lowering movement of the lifting frame, and the lifting and lowering of the lifting frame changes the vertical distance between the first guide roller and the second guide roller, thereby adjusting the length of the pouch film stretched and guided between the first guide roller and the second guide roller.

[0031] When the process after the pouch film discharge unit is interrupted or delayed, the control unit raises the lifting frame to increase the vertical distance between the first guide roller and the second guide roller, thereby increasing the travel path of the pouch film that is guided between the first guide roller and the second guide roller. [Effects of the Invention]

[0032] According to the present invention, the vertical or horizontal inclination of the first guide roller that supplies the pouch film can be measured, and the verticality and parallelism of the first guide roller can be monitored and effectively managed.

[0033] Furthermore, the vertical inclination or horizontal inclination can be adjusted within a set range, thereby reliably preventing the pouch film from meandering.

[0034] Furthermore, by raising the first guide roller and adjusting the travel path of the pouch film, maintenance time can be secured even if a problem occurs during the pouch film processing process, etc. This allows the pouch film supply process to be carried out without interruption, significantly improving work productivity. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a schematic diagram of a conventional pouch-type battery case molding device. [Figure 2] 1 is a schematic view of a pouch film supplying device for a secondary battery according to a first embodiment. [Figure 3] 1 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a first embodiment. [Figure 4] 3A and 3B are a front cross-sectional view and a side cross-sectional view of a first guide roller. [Figure 5] 10 is a schematic view showing the process of adjusting the vertical inclination of the first guide roller. FIG. [Figure 6] 3 is a schematic diagram showing a process in which a pouch film is supplied by the pouch film supply device for a secondary battery of the first embodiment. FIG. [Figure 7] FIG. 10 is a schematic view of a pouch film supplying device for secondary batteries according to a second embodiment. [Figure 8] FIG. 6 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a second embodiment. [Figure 9] 10 is a schematic view showing a process of adjusting the left and right tilt of the first guide roller. FIG. [Figure 10] FIG. 10 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present invention will be described in detail below. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concepts of the terms in order to best describe his own invention.

[0037] In this application, terms such as "comprise" and "have" are intended to specify the presence of a feature, numeral, step, operation, component, part, or combination thereof described in the specification, but may be understood as not excluding the presence or addition of one or more other features, numerals, steps, operations, components, parts, or combinations thereof. Furthermore, when a layer, film, region, plate, or other part is described as being "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part between them. Conversely, when a layer, film, region, plate, or other part is described as being "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part between them. Furthermore, in this application, "over" can include not only the case where it is "on top" but also the case where it is "under" the other part.

[0038] The present invention will be described in detail below.

[0039] The pouch film supplying device for secondary batteries of the present invention includes a first guide roller, a second guide roller, and a tilt measuring member.

[0040] The first guide roller and the second guide roller are rollers that can increase or decrease the travel path of the pouch film by redirecting and guiding the pouch film. Multiple first guide rollers and multiple second guide rollers are installed between the pouch film input section and the output section.

[0041] The pouch film input section is a section where the pouch film is introduced into the first guide roller or the second guide roller. When the pouch film supplying device includes an external housing, the pouch film input section may be an input port formed through the external housing. Alternatively, when the pouch film supplying device includes a frame, the pouch film input section may be an open space between the frames. Alternatively, when the pouch film supplying device is installed in an open location without a housing or frame, the pouch film input section may simply be an open space where the pouch film is introduced.

[0042] The pouch film discharge section is a section where the pouch film is guided from the first guide roller or the second guide roller and discharged toward another subsequent process section. When the pouch film supplying device includes an external housing, the pouch film discharge section may be an outlet formed through the external housing. Alternatively, when the pouch film supplying device includes a frame, the pouch film discharge section may be an open space between the frames. Alternatively, when the pouch film supplying device is installed in an open location without a housing or frame, the pouch film discharge section may simply be an open space where the pouch film is discharged.

[0043] The shapes of the pouch film input and output portions are not limited to those described above, and may be variously changed depending on the shape of the housing surrounding the pouch film supply device.

[0044] A plurality of first guide rollers are installed between the pouch film inlet and outlet, and the plurality of first guide rollers are installed at predetermined intervals. The first guide roller is a cantilever-type roller with one side fixed and supported. One side of the guide roller may be fixed to a fixed frame or a movable frame. Due to the installation structure of the first guide roller, the load of the first guide roller is concentrated on the one side. To distribute or support the load, the fixed frame or movable frame may be installed on a fixed structure such as an installation wall. Because the first guide roller is a cantilever-type roller, the other side of the first guide roller, which is not fixed and supported, may gradually bend downward as the first guide roller repeatedly guides the pouch film. In other words, the vertical inclination of the first guide roller fluctuates. "Vertical inclination" refers to the degree to which the first guide roller is tilted upward or downward relative to the horizontal. As the other side of the first guide roller bends downward, the upward inclination of the first guide roller gradually decreases and the downward inclination gradually increases. Because the degree of downward deflection varies depending on the first guide roller, the upward or downward inclination varies slightly for each first guide roller. If the vertical inclination deviates from a predetermined range, meandering occurs during pouch film transport. Therefore, as described below, the vertical inclination of the first guide rollers must be measured and monitored. Furthermore, based on the monitoring results, the vertical inclination of the first guide rollers can be adjusted within a predetermined range. Ideally, the vertical inclination of the first guide rollers can be set to zero, so that the first guide rollers are aligned completely horizontally. However, in the present invention, the first guide rollers do not necessarily need to be maintained strictly horizontal. For example, the first guide rollers may have a vertical inclination that is relatively close to horizontal, as long as it does not cause meandering of the pouches. In other words, it is sufficient to control the inclination angle of the first guide rollers so that it falls within a predetermined vertical inclination range. It is more important to uniformly control the vertical inclination of the first guide rollers.

[0045] Furthermore, because the first guide roller is a cantilever type, the other side of the first guide roller, which is not fixedly supported, may become misaligned left or right as it repeatedly guides the pouch film. That is, the left-right inclination of the first guide roller fluctuates. "Left-right inclination" refers to the degree to which the first guide roller is tilted left or right relative to the vertical direction. Because the degree to which the other side of the first guide roller is displaced left or right varies, this left-right inclination varies slightly for each first guide roller. If the left-right inclination also deviates from a set range, meandering occurs during pouch film transport. Therefore, the left-right inclination of the first guide roller must be measured and monitored. Furthermore, the left-right inclination of multiple first guide rollers can be adjusted within a set range based on the monitoring results. Ideally, the left-right inclination of the first guide roller can be set to zero, so that one side and the other side of the first guide roller are positioned perfectly vertically. However, the present invention is not limited thereto. For example, the first guide roller may have a left-right inclination relatively close to zero within a range that does not cause meandering of the pouch. What is more important is to maintain uniform parallelism of the first guide rollers by uniformly managing the left and right inclination of the first guide rollers.

[0046] A plurality of second guide rollers are installed between the pouch film input section and the discharge section, and the plurality of second guide rollers are installed at predetermined intervals. The second guide rollers are installed below the first guide roller. Therefore, the pouch film is alternately guided by the upper first guide roller and the lower second guide roller. As the pouch film is alternately guided by the upper and lower first and second guide rollers, the pouch film runs in a zigzag pattern between the pouch film input section and the discharge section. By forming a long zigzag running path, the pouch film can run along a longer path within the same installation space. The second guide roller can be installed below the space between two adjacent first guide rollers installed above. Conversely, the first guide roller can be installed above the space between two adjacent second guide rollers installed below. This allows the pouch film, alternately guided by the first and second guide rollers, to effectively run in a zigzag pattern.

[0047] Both sides of the second guide roller are fixed to the bottom of the first guide roller. For example, both sides of the second guide roller may be fixed to a fixture installed at the bottom. Because the second guide roller is stably supported by the bottom, the pouch film can move from the pouch film input section to the pouch film output section while stably maintaining its zigzag shape.

[0048] Depending on the number of first and second guide rollers, the pouch film first introduced from the pouch film introduction section may be guided by either the first guide roller or the second guide roller. For example, if the number of first guide rollers is greater than the number of second guide rollers, the pouch film may be guided first by the first guide roller. In addition, the pouch film guided to the pouch film discharge section may also be guided by the first or second guide roller.

[0049] Alternatively, other guide rollers may be disposed before or after the space where the first and second guide rollers are disposed. For example, additional guide rollers may be disposed in the space between the pouch film input section and the first and second guide rollers or in the space between the pouch film discharge section and the first and second guide rollers to adjust the discharge direction of the pouch film.

[0050] The first and second guide rollers may be driven rollers or driving rollers.

[0051] The first and second guide rollers include roller portions extending transversely to the guide direction to guide the pouch film, and the pouch film may be guided while riding over the roller portions to change direction.

[0052] A shaft extending in the same direction as the roller unit is installed at the center of the roller unit. The shaft and the roller unit are integrally coupled and can rotate together by rotation of the shaft or the roller unit. When the shaft is connected to a driving unit and rotates, the first guide roller and the second guide roller can be driving rollers. When the shaft is rotated passively by rotation of the roller unit, the first guide roller and the second guide roller are driven rollers.

[0053] Bearings are installed on both sides of the rollers. The bearings may be, for example, radial bearings in which bearings are located in a retainer between an outer ring and an inner ring. The shaft is inserted into the inner ring and can rotate relative to the outer ring.

[0054] Extension rods may be provided protruding from the outer ring of the bearing unit to one side and the other side of the first guide roller. The outer ring of the bearing unit does not rotate despite the rotation of the roller unit. Therefore, by fixedly installing the extension rods protruding from the outer ring of the bearing unit, one side of the first guide roller may be fixedly supported. Specifically, a first extension rod protruding from the outer ring of the bearing unit to one side of the first guide roller may be fixedly supported. The first extension rod may be fixedly coupled to a fixed frame or a movable frame.

[0055] A second extension rod may be provided that protrudes from the outer ring of the bearing unit to the other side of the first guide roller. The second extension rod also does not rotate despite the rotation of the roller unit. A tilt measuring member, which will be described later, may be installed on the second extension rod. The second extension rod may also be supported by another cantilever-type support frame.

[0056] If necessary, the support frame may be provided with an inclination adjustment member, which will be described later.

[0057] Similar to the first guide roller, the second guide roller may also include a first extension rod and a second extension rod protruding from bearing portions (outer rings) on both sides of the roller portion.

[0058] The first and second extension rods provided on both sides of the second guide roller may be fixedly coupled to a fixture installed on the bottom, for example, so that both sides of the second guide roller are stably supported by the bottom and the pouch film can be stably guided.

[0059] The present invention further includes an inclination measuring member provided on the other side of the first guide roller, for measuring at least one of the up-down inclination and the left-right inclination of the first guide roller.

[0060] As described above, the tilt measuring member may be installed on a non-rotating portion of the first guide roller, for example, on a second extension rod extending from the outer ring of a bearing unit installed on the other side of the roller unit, thereby enabling the tilt measuring member to stably measure the up-down tilt or left-right tilt of the first guide roller.

[0061] The tilt measuring member may be a tilt sensor that measures the degree of tilt (tilt) relative to a reference plane. A tilt sensor measures the tilt angle of the surface to be measured by calculating the tilt angle from the behavior of a liquid or pendulum due to gravity. Alternatively, a digital level may be used as the tilt measuring member. A digital level has a built-in bubbler and can easily quantify and express the tilt of the surface to be measured based on the change in the position of the bubble relative to the surface to be measured. However, the tilt measuring member is not limited to the above-mentioned one, and it goes without saying that other types of tilt measuring members may be used as long as they can suitably measure the up-down tilt or left-right tilt of the first guide roller.

[0062] The inclination measuring member may include at least one of a first inclination measuring member that measures the up-down inclination of the first guide roller and a second inclination measuring member that measures the left-right inclination of the first guide roller.

[0063] The pouch film supplying device of the present invention may further include an inclination adjusting member that adjusts at least one of the vertical inclination and the horizontal inclination of the first guide roller.

[0064] In addition, the pouch film supply device of the present invention is configured to be able to raise and lower the plurality of first guide rollers, and can adjust the length of the pouch film that is stretched and guided between the first guide roller and the second guide roller.

[0065] The specific configuration and detailed components of the pouch film supply device will be described in detail below with reference to the drawings and the following embodiments.

[0066] (First embodiment) Figure 2 is a schematic diagram of the pouch film supplying device for secondary batteries in the first embodiment, Figure 3 is a schematic diagram of the main parts of the pouch film supplying device for secondary batteries in the first embodiment, Figure 4 is a front cross-sectional view and a side cross-sectional view of the first guide roller, Figure 5 is a schematic diagram showing the process of adjusting the up and down inclination of the first guide roller, and Figure 6 is a schematic diagram showing the process of supplying pouch film by the pouch film supplying device for secondary batteries in the first embodiment.

[0067] As shown in FIG. 2, the pouch film supplying device 100 for secondary batteries of this embodiment includes a frame F in the shape of a frame.

[0068] The frame F can be installed on the wall W of a factory building. In FIG. 1, the frames F are installed on the left and right sides of the supply device 100, but a frame can also be installed on the front side. The pouch film 1 is supplied to and discharged from the open space inside the left and right frames F. In this embodiment, the pouch film 1 advances from right to left. Therefore, the open space inside the frame of the right frame F is the pouch film input section I, and the open space inside the frame of the left frame F is the pouch film output section O.

[0069] A first guide roller 110 and a second guide roller 120 are installed above and below in the space between the left and right frames F. However, depending on the travel path of the pouch film 1, some of the guide rollers may be positioned outside the frames F. In FIG. 2, the rightmost second guide roller 120 is positioned outside the right frame F.

[0070] A plurality of second guide rollers 120 are installed at predetermined intervals from right to left between the pouch film input section I and the discharge section O. Both sides of the second guide rollers 120 are fixedly coupled to fixing jigs 160, which are fixedly installed at the bottom. That is, both sides of the second guide rollers 120 are fixedly installed below the first guide rollers 110, so that the pouch film 1 can be stably guided.

[0071] A plurality of first guide rollers 110 are installed at predetermined intervals above the second guide rollers 120. The first guide rollers 110 are also installed between the pouch film input section I and the discharge section O from right to left along the traveling direction of the pouch film.

[0072] As shown in FIG. 6, the pouch film 1 is alternately guided by a first guide roller 110 and a second guide roller 120, and can form a zigzag running path between the pouch film input section I and the output section O.

[0073] Both sides of the second guide roller 120 are fixedly installed below the first guide roller 110, while all or some of the first guide rollers 110 may be installed to be able to rise and fall relative to the second guide roller 120. In FIG. 2, six of the total eight first guide rollers 110 are installed to be able to rise and fall. When the first guide rollers 110 rise and fall, the distance between the first guide roller 110 and the second guide roller 120 changes, and therefore the length of the pouch film 1 that is suspended and guided between the first guide roller and the second guide roller can be adjusted.

[0074] Unlike the second guide roller 120, which has both sides fixed, the first guide roller 110 has a cantilever shape with only one side fixed and supported. Fixing only one side of the first guide roller 110 in this manner simplifies the coupling of the first guide roller 110 to the lifting mechanism 180, which will be described later. That is, by coupling only one side of the first guide roller 110 to the lifting frame 181 of the lifting mechanism 180 and lifting the lifting frame 181, the first guide roller 110 can be easily raised and lowered. To configure the lifting frame 181 in such a way that both sides of the first guide roller 110 are coupled, the configuration of the lifting frame 181 and the associated lifting mechanism 180 becomes complicated.

[0075] In addition, the other side of the first guide roller 110 needs to be open at the front for maintenance, etc. Therefore, the other side of the first guide roller 110 is not fixedly coupled to another structure such as the lifting frame 181. However, the other side of the first guide roller 110 may be supported by an auxiliary frame such as the support frame 150 described below.

[0076] The detailed configuration of the first guide roller and the second guide roller will be described with reference to FIG.

[0077] The first guide roller 110 and the second guide roller 120 include roller units 111 and 121 that extend transversely to the guide direction and guide the pouch film 1. A shaft S that extends in the extension direction of the roller unit is protruded from both ends of the center of the roller unit. The shaft S and the roller units 111 and 121 are integrally coupled and can rotate together with the rotation of the shaft or the roller units. When the shaft is connected to a driving unit such as a motor and rotates, the first guide roller 110 and the second guide roller 120 can be driving rollers. When the shaft is passively rotated by the rotation of the roller units 111 and 121, the first guide roller 110 and the second guide roller 120 are driven rollers. In this embodiment, the first guide roller 110 and the second guide roller 120 are driven rollers. Therefore, when a drive roller (not shown) arranged before the input section I or after the output section O of the pouch film supply device 100 for secondary batteries of the present invention rotates, the roller portions 111 and 121 of the first guide roller and second guide roller, which are driven rollers, rotate to guide the pouch film 1.

[0078] Bearing units 112 and 122 are installed on both sides of the roller units 111 and 121. In this embodiment, the bearing units 112 and 122 are radial bearing units in which a bearing B is located in a retainer unit R between an outer ring OR and an inner ring IR. A shaft S is inserted into the inner ring IR and can rotate relative to the outer ring OR. Extension rods are provided protruding from the outer rings of the bearing units 112 and 122 to one and the other sides of the first and second guide rollers. The outer rings of the bearing units 112 and 122 do not rotate despite the rotation of the roller units. Therefore, the guide rollers are fixedly supported by fixedly installing the extension rods protruding from the outer rings of the bearing units.

[0079] Specifically, a first extension rod 113A protruding from the outer ring OR of the bearing unit to one side of the first guide roller 110 may be fixed to an installation wall W (or a fixed frame) or a movable frame (e.g., lift frame 181). A second extension rod 113B protruding from the outer ring of the bearing unit to the other side of the first guide roller 110 may also be provided. The second extension rod 113B does not rotate despite the rotation of the roller unit. Therefore, an inclination measuring member may be installed on the second extension rod 113B, allowing the inclination of the first guide roller 110 to be stably measured.

[0080] Like the first guide roller 110, the second guide roller 120 may also include a first extension rod 123A and a second extension rod 123B protruding from the outer rings of the bearing units on both sides of the roller unit. A fixing jig 160 is installed under the second guide roller 120. The fixing jig 160 has upward extensions 162 on both sides or one side. As shown in FIG. 2, the second extension rod 123A of the second guide roller 120 is coupled to the upward extension 162 at the front end of the fixing jig 160. The upward extension 162 has a coupling groove 163 into which the second extension rod 123B of the second guide roller 120 is coupled. The first extension rod 123A of the second guide roller 120 may be coupled to the upward extension at the rear end of the fixing jig 160 or to the installation wall W.

[0081] 2 and 3, a first tilt measuring member 130A for measuring the vertical tilt is installed on a second extension rod 113B protruding from the other side of the first guide roller 110.

[0082] As described above, the first tilt measuring member 130A may be a digital level gauge that incorporates a tilt sensor or bubble gauge that measures the degree of tilt (tilt) relative to a reference plane and can easily digitize and display the tilt of the surface to be measured according to the change in the bubble position depending on the surface to be measured. To measure the upward or downward tilt of the second extension rod 113B, for example, a digital level gauge is installed on the upper surface of the second extension rod 113B. To stably measure the upward or downward tilt, the first tilt measuring member jig 131A may be first coupled to the second extension rod 113B, and then the first tilt measuring member 130A may be installed on the jig 131A. An installation groove is formed in the lower part of the jig 131A so that it can be mounted on the second extension rod 113B. The installation groove may be circular, V-shaped, or other shapes to match the shape of the upper surface of the second extension rod 113B.

[0083] For example, the screen of the first inclination measuring member 130A, which is a digital level gauge, displays the upward or downward inclination of the second extension rod 113B (and the roller unit 111). Therefore, the vertical inclination of the first guide roller 110 can be grasped in real time. Referring to FIG. 2, the first inclination measuring member 130A can be connected to a monitoring unit 170 via a wire or wirelessly. The monitoring unit 170 can be a component included in a control unit 190 that controls the transport of the pouch film and a lifting mechanism 180 of the first guide roller 110, which will be described later. The monitoring unit 170 can be a computing system that can communicate with a factory production management system via wire or wireless communication. The monitoring unit 170 can also include a display unit, and the vertical inclination of the first guide roller 110 measured by the first inclination measuring member 130A can be displayed on the display unit in real time. According to the present invention, by monitoring the vertical inclination of the first guide roller 110 in real time, the degree of deflection and the deflection tendency of each first guide roller 110 can be quantitatively analyzed. Furthermore, if the monitored vertical inclination is outside the set range, the vertical inclination of the plurality of first guide rollers 110 can be adjusted uniformly by adjusting the vertical inclination using the inclination adjustment member. This can prevent the pouch film from meandering in the pouch film supplying device 100. Therefore, defects can also be prevented in the pouch forming section that processes the pouch film 1 supplied from the pouch film supplying device 100.

[0084] The pouch film supplying device 100 of this embodiment also includes an inclination adjustment member that adjusts the vertical inclination of the first guide roller 110. Referring to Figures 3 and 5, a height adjustment bolt 140A is shown as the vertical inclination adjustment member.

[0085] In particular, in this embodiment, a support frame 150 is provided to support the other side of the first guide roller 110 and the height adjustment bolt. As shown in FIGS. 2, 3, and 5, a main body 151 of the support frame 150 is installed below the first guide roller 110 in the extension direction of the first guide roller 110. The support frame 150 is also a cantilever-type frame having one side fixedly supported on the same side as the one side of the first guide roller 110. The other side of the support frame 150 supports the other side of the first guide roller 110, i.e., the second extension rod 113B at the end of the other side of the first guide roller 110. Specifically, the support frame 150 has upward extensions 152 and 153 bent upward toward the first guide roller 110 at the ends of one and the other sides, respectively. An upward extension 152 provided at an end of one side of the support frame 150 is fixedly coupled to the installation wall W or the lift frame 181, similar to one side of the first guide roller 110. An upward extension 153 provided at an end of the other side of the support frame 150 supports the second extension rod 113B of the first guide roller 110. An installation groove 154 in which the second extension rod 113B of the first guide roller 110 is placed is formed at the top of the upward extension 153 at the end of the other side. As such, the installation groove 154 of the support frame 150 supports the second extension rod 113B, thereby preventing or reducing the degree of deflection of the first guide roller 110. The support frame 150 is also a cantilever-type structure supported only on one side, but has greater rigidity than the first guide roller 110 and supports the other side of the first guide roller 110, thereby distributing the load applied to the first guide roller 110.

[0086] In addition, an inclination adjustment member is installed on the other side of the support frame 150. Specifically, a height adjustment bolt 140A extending vertically through an upward extension 153 at the other end of the support frame 150 may be used as the inclination adjustment member. The height adjustment bolt 140A is installed by passing through the upward extension 153 at the bottom of the installation groove 154. The upward extension 153 has a hollow inside, and the height adjustment bolt 140A can be inserted into the hollow. Therefore, the body 142A of the height adjustment bolt 140A is inserted into the hollow. Insertion holes are formed at the top and bottom of the upward extension 153. An end of the body 142A of the height adjustment bolt is exposed through the upper insertion hole. The exposed end of the body protrudes above the installation groove 154 at the top of the upward extension. The second extension rod 113B of the first guide roller 110 is placed and supported on the end of the body protruding above the installation groove.

[0087] The height adjustment bolt 140A passes through an insertion hole at the bottom of the upward extension 153 and is exposed at the bottom of the upward extension. A head 141A of the height adjustment bolt 140A protrudes from the bottom of the upward extension. A threaded hole is formed in the insertion hole of the upward extension into which the height adjustment bolt 140A is inserted, allowing the height adjustment bolt 140A to be threadedly engaged with the threaded hole. Therefore, the height adjustment bolt 140A can be moved up and down by rotating the height adjustment bolt 140A relative to the threaded hole. When the height adjustment bolt 140A moves upward, the second extension rod 113B supported on the upper end of the body of the height adjustment bolt 140A also moves upward, thereby changing the vertical inclination of the first guide roller 110. The manner in which the vertical inclination of the first guide roller 110 is changed by adjusting the height adjustment bolt 140A up and down is shown by dotted and solid lines in FIG. 5. For example, if the upward or downward inclination measured by the first inclination measuring member 130A is outside the set range, the upward or downward inclination of the plurality of first guide rollers 110 can be adjusted uniformly within a range in which meandering does not occur by adjusting the upward or downward inclination with the height adjustment bolt 140A.

[0088] In this case, the monitoring unit 170 monitors the vertical inclination of the first guide roller 110, and if the vertical inclination of the first guide roller 110 is outside a set range according to the monitoring result, an operator can adjust the vertical inclination of the first guide roller 110 by adjusting the height adjustment bolt 140A. If necessary, an alarm connected to the monitoring unit 170 can be installed to sound the alarm when the vertical inclination of the first guide roller 110 is abnormal, and the vertical inclination of the first guide roller 110 can be adjusted.

[0089] The pouch film supplying device 100 for secondary batteries of this embodiment also includes an elevation mechanism 180 that raises and lowers the first guide roller 110 .

[0090] An example of the lifting mechanism 180 may include a lifting frame 181 to which one side of at least one of the plurality of first guide rollers 110 is fixedly supported, a drive unit that raises and lowers the lifting frame 181, and a lifting guide 183 that extends in the vertical direction and guides the lifting and lowering movement of the lifting frame 181.

[0091] It is not necessary to raise and lower all of the first guide rollers 110; the travel path of the pouch film between the first guide roller 110 and the second guide roller 120 can be changed by raising and lowering at least one first guide roller 110. In this embodiment, six first guide rollers 110 are mounted on a lifting frame 181. The lifting frame 181 is raised and lowered by a drive unit. The drive unit may include a drive source such as a motor (not shown), a ball screw 182 rotated by the drive source, and a threaded coupling portion threadedly coupled to the ball screw. The threaded coupling portion is provided on the lifting frame 181. Such a drive unit using a ball screw mechanism is generally known, and therefore a detailed description thereof will be omitted. Of course, in addition to the ball screw mechanism, another linear movement mechanism may also be used.

[0092] For stable lifting and lowering movement, a lifting guide 183 for guiding the lifting and lowering operation is provided. The lifting guide 183 may be installed on the frame F or the installation wall W. A plurality of lifting and lowering guides 183 may be provided. The ball screw 182 may be located in an installation space S formed on the installation wall W. The lifting frame 181 moves up and down along the lifting guide 183 installed on the installation wall W or the frame F.

[0093] Meanwhile, a control unit 190 is connected to the lifting mechanism 180 and controls the lifting and lowering of the lifting frame 181. The control unit 190 may be a PLC control unit that controls the transfer of the pouch film 1. As described above, the control unit 190 may include a monitoring unit 170 connected to the inclination measuring member of the first guide roller 110. In addition, the control unit 190 is connected to equipment in processes before the pouch film input unit I and / or processes after the discharge unit O so as to be able to communicate data with each other. In particular, if a problem occurs in a process after the pouch film discharge unit O, for example, in the pouch forming unit, the control unit 190 may adjust the travel path of the pouch film 1 by adjusting the lifting and lowering of the lifting frame 181. For example, if a process after the pouch film discharge unit O is interrupted or delayed, the control unit 190 can raise the lift frame 181 to increase the vertical distance between the first guide roller 110 and the second guide roller 120, thereby increasing the travel path of the pouch film 1 guided between the first and second guide rollers. This can ensure time for maintenance or pouch film replacement after the discharge unit O. Furthermore, even during maintenance, the pouch film supply device 100 can continuously supply and transport the pouch film 1, preventing unnecessary interruptions of the preceding process due to a malfunction in the following process. As such, the present invention can prevent work loss in the following process and significantly improve overall work productivity.

[0094] (Second embodiment) Figure 7 is a schematic diagram of a pouch film supplying device for secondary batteries according to a second embodiment, Figure 8 is a schematic diagram of a main part of the pouch film supplying device for secondary batteries according to the second embodiment, and Figure 9 is a schematic diagram showing the process of adjusting the left and right inclination of the first guide roller.

[0095] The pouch film supply device 100′ of the second embodiment differs from the first embodiment, which measures the up-down inclination, in that the inclination measuring member installed on the first guide roller 110 measures the left-right inclination of the first guide roller 110. Therefore, the configuration of the second inclination adjusting member that adjusts the left-right inclination is different from the first inclination adjusting member that adjusts the up-down inclination.

[0096] Other than that, the configurations of the first guide roller 110, the second guide roller 120, the lifting mechanism 180, etc. are the same as those in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed explanations thereof will be omitted.

[0097] Because the first guide roller 110 is supported in a cantilevered manner, the other side of the first guide roller 110, i.e., the second extension rod 113B on the other side, not only bends downward but also moves left or right due to the repeated load of the pouches being transported. That is, one side and the other side of the first guide roller 110 do not lie exactly on a vertical line, but inevitably deviate to the left or right. In the second embodiment, by measuring this leftward or rightward inclination of the first guide roller 110, meandering of the pouch film can be prevented.

[0098] 7 and 8, a second tilt measuring member 130B for measuring the left-right tilt of the first guide roller 110 is installed on the second extension rod 113B of the first guide roller 110. Unlike the first tilt measuring member 130A for measuring the up-down tilt, the second tilt measuring member is installed on the side of the second extension rod 113B. For stable tilt measurement, the second tilt measuring member 130B is installed on a second tilt measuring member jig 131B. An installation groove is formed in the bottom of the jig 131B so that it can be mounted on the second extension rod 113B. The shape of the installation groove can be circular, V-shaped, or other shapes to match the shape of the side of the second extension rod 113B.

[0099] The second inclination measuring member 130B may be a digital level gauge that has a built-in inclination sensor or bubble gauge that measures the degree of inclination (inclination) relative to a reference surface, and can easily quantify and represent the inclination of the surface to be measured according to the change in the position of the bubble depending on the surface to be measured.

[0100] For example, the screen of the second inclination measuring member 130B, which is a digital level, displays the leftward or rightward inclination of the second extension rod 113B (and the roller unit). Therefore, the lateral inclination of the first guide roller 110 can be grasped in real time. Referring to FIG. 7 , the second inclination measuring member 130B can be connected to the monitoring unit 170 via a wired or wireless connection. The monitoring unit 170 includes a predetermined display unit, and the lateral inclination of the first guide roller 110 measured by the second inclination measuring member can be displayed on the display unit in real time. Thus, according to the present invention, by monitoring the lateral inclination of the first guide rollers 110 in real time, the degree of deflection and deflection tendency of each first guide roller 110 can be quantitatively analyzed. Furthermore, if the monitored lateral inclination is outside a predetermined range, the lateral inclination of the plurality of first guide rollers 110 can be adjusted uniformly by adjusting the lateral inclination using an inclination adjusting member (described later). This can prevent the pouch film from meandering in the pouch film supplying device 100. Therefore, defects in the pouch forming section that processes the pouch film supplied from the pouch film supplying device 100 can also be prevented.

[0101] The pouch film supplying device 100 of this embodiment also includes a left-right tilt adjustment bolt 140B that adjusts the left-right tilt of the first guide roller 110.

[0102] Referring to FIG. 8 , an upward extension 153 is provided at the end of the other side of a cantilever-type support frame 150, and an installation groove 154 is formed at the top of the upward extension, into which the second extension rod 113B of the first guide roller 110 is placed. The left-right tilt adjustment bolt 140B is installed at the other side of the support frame 150. Specifically, the left-right tilt adjustment bolt 140B is installed to extend left and right through a side wall 153-1 of the upward extension at the other end of the support frame 150. The left-right tilt adjustment bolt 140B is coupled to the upward extension 153 to support the left side, right side, or both the left and right side of the second extension rod 113B. In this embodiment, a pair of left-right tilt adjustment bolts 140B is provided on the left and right sides of the second extension rod 113B to support both the left and right side of the second extension rod 113B.

[0103] 9, a pair of left and right inclination adjustment bolts 140B are threadedly coupled to the upward extension side walls 153-1 located on the left and right of the installation groove 154 of the upward extension. The left and right inclination adjustment bolts 140B pass through the upward extension side walls to support the left and right sides of the first guide roller 110 in the left-right direction. By changing the threaded coupling position of the inclination adjustment bolts 140B relative to the upward extension side walls to the left or right, the horizontal position of the second extension rod 113B located between the left and right inclination adjustment bolts 140B can be adjusted. The left and right inclination adjustment bolt 140B is composed of a head 141B and a body 142B, and the head protrudes outside the upward extension.

[0104] The manner in which the left-right inclination of the first guide rollers 110 is changed by the left-right inclination adjusting bolt 140B is shown by dotted and solid lines in Figure 9. For example, if the left-right inclination measured by the second inclination measuring member 130B is outside the set range, the left-right inclination of the plurality of first guide rollers 110 can be adjusted uniformly within a range in which meandering does not occur by adjusting the left-right inclination by the left-right inclination adjusting bolt 140B.

[0105] In this case, the left and right inclination of the first guide roller 110 is monitored by the monitoring unit 170, and the worker can adjust the left and right inclination of the first guide roller 110 by adjusting the left and right inclination adjustment bolt according to the monitoring results.

[0106] (Third embodiment) FIG. 10 is a schematic view of a main part of a pouch film supplying device 100 for secondary batteries according to the third embodiment.

[0107] The third embodiment includes both the vertical inclination measuring member 130A of the first embodiment and the horizontal inclination measuring member 130B of the second embodiment. This allows the vertical and horizontal inclinations of the first guide roller 110 to be measured and monitored by the monitoring unit 170.

[0108] It also includes a height adjustment bolt 140A for adjusting the up and down tilt and a left and right tilt adjustment bolt 140B for adjusting the left and right tilt.

[0109] Therefore, when the monitored vertical inclination and horizontal inclination are outside the set range, the vertical, horizontal, and left-right inclinations of the first guide roller 110 can all be adjusted by the height adjustment bolt 140A and the left-right inclination adjustment bolt 140B. Therefore, according to this embodiment, meandering of the first guide roller 110 can be more reliably prevented.

[0110] The present invention has been described in more detail above with reference to the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, at the time of filing this application, there may be various equivalents and modifications that can replace them. [Explanation of symbols]

[0111] 1: Pouch film 100, 100': Pouch film supply device 110: First guide roller 111: Roller section 112: Bearing part 113A: First extension rod 113B: Second extension rod 120: Second guide roller 121: Roller section 122: Bearing part 123A: First extension rod 123B: Second extension rod 130A: First inclined measuring member 130B: Second inclination measuring member 131A: First tilt measuring member jig 131B: Second tilt measuring member jig 140A: First tilt adjustment member (height adjustment bolt) 141A: Head 142A: Main body 140B: Second tilt adjustment member (left and right tilt adjustment bolt) 141B: Head 142B: Main body 150: Support frame 151: Support frame body 152: One side upward extension 153: Other side upward extension 153-1: Upward extension side wall 154: Installation groove 160: Fixture 161: Fixture body 162: Other side upward extension 163: Binding groove 170: Monitoring Department 180: Lifting mechanism 181: Lifting frame 182: Ball screw 183: Lifting guide 190: Control unit

Claims

1. a plurality of first guide rollers spaced apart from each other and disposed between the pouch film input section and the pouch film discharge section to guide the pouch film and having one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller to measure at least one of an up-down tilt and a left-right tilt of the first guide roller, Both sides of the second guide roller are fixed to the lower part of the first guide roller, At least one of the first guide rollers is installed so as to be able to move up and down relative to the second guide roller.

2. A plurality of first guide rollers that are installed at a distance between the pouch film input section and the pouch film discharge section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller to measure at least one of an up-down tilt and a left-right tilt of the first guide roller, The first guide roller is a roller portion extending across the guide direction of the pouch film to guide the pouch film; bearing units installed on both sides of the roller unit; A pouch film supply device for secondary batteries, comprising: a first extension rod that protrudes from the bearing portion to one side of the first guide roller and is fixedly supported; and a second extension rod that protrudes from the other side of the first guide roller.

3. A plurality of first guide rollers that are installed at a distance between the pouch film input section and the pouch film discharge section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller to measure at least one of an up-down tilt and a left-right tilt of the first guide roller, The apparatus further includes an inclination adjusting member for adjusting at least one of an up-down inclination and a left-right inclination of the first guide roller, the device for supplying a pouch film for a secondary battery further includes a support frame installed below the first guide roller in parallel with an extension direction of the first guide roller, one side of which is fixed and supported on the same side as the one side of the first guide roller, and the other side of which supports the other side of the first guide roller.

4. A plurality of first guide rollers that are installed at a distance between the pouch film inlet section and the pouch film outlet section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller to measure at least one of an up-down tilt and a left-right tilt of the first guide roller, a monitoring unit connected to the tilt measuring member and configured to monitor at least one of an up-down tilt and a left-right tilt of the first guide roller measured by the tilt measuring member; and a tilt adjusting member for adjusting at least one of the vertical tilt and the horizontal tilt of the first guide roller, A pouch film supply device for secondary batteries, wherein when the vertical inclination or horizontal inclination of the first guide roller monitored by the monitoring unit falls outside a set range, the inclination adjustment member adjusts at least one of the vertical inclination and horizontal inclination of the first guide roller.

5. A plurality of first guide rollers that are installed at a distance between the pouch film input section and the pouch film discharge section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller to measure at least one of an up-down tilt and a left-right tilt of the first guide roller, a lifting frame to which one side of at least one of the plurality of first guide rollers is fixedly supported; a drive unit that raises and lowers the lifting frame; a lifting guide extending in the vertical direction and guiding the lifting frame in a lifting operation, The vertical distance between the first guide roller and the second guide roller varies as the lifting frame is raised and lowered, thereby adjusting the length of the pouch film that is stretched and guided between the first guide roller and the second guide roller.

6. A plurality of first guide rollers that are installed at a distance between the pouch film input section and the pouch film discharge section, guide the pouch film, and have one side fixedly supported; a plurality of second guide rollers that are spaced apart from each other and installed below the first guide roller between the pouch film input section and the pouch film discharge section to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller, for measuring at least one of the vertical tilt and the horizontal tilt of the first guide roller.

7. 7. The pouch film supply device for secondary batteries according to claim 1, wherein the pouch film is alternately guided by the first guide roller and the second guide roller to form a zigzag running path between the pouch film input section and the pouch film discharge section.

8. The pouch film supply device for secondary batteries according to claim 2 , wherein the tilt measuring member is installed on the second extension rod.

9. 3. The pouch film supply device for secondary batteries according to claim 2, wherein the inclination measuring member includes at least one of a first inclination measuring member that measures the up-and-down inclination of the first guide roller and a second inclination measuring member that measures the left-and-right inclination of the first guide roller.

10. The pouch film supplying device for secondary batteries according to claim 3 , wherein the tilt adjusting member is installed on the other side of the support frame.

11. an upward extension bent upward toward the first guide roller at an end of the other side of the support frame; The pouch film supplying device for a secondary battery according to claim 3 , wherein an installation groove is provided on an upper portion of the upward extension portion, into which an extension rod of the first guide roller is placed.

12. 12. The pouch film supply device for a secondary battery according to claim 11, wherein a height adjustment bolt is installed through the upward extension portion at the lower portion of the installation groove to support an end portion of the other side portion of the first guide roller in the vertical direction and to adjust the height.

13. 12. The pouch film supply device for secondary batteries according to claim 11, wherein a left-right inclination adjustment bolt is installed through the left and right side walls of the upward extension portion of the installation groove to support the end of the other side of the first guide roller in the left-right direction and whose position can be adjusted in the left-right direction.

14. 6. The pouch film supply device for secondary batteries according to claim 5, wherein, when a process subsequent to the pouch film discharge unit is interrupted or delayed, a control unit raises the lifting frame to increase the vertical distance between the first guide roller and the second guide roller, thereby increasing the travel path of the pouch film that is guided between the first guide roller and the second guide roller.

Images