Discharge device, electrode slitting system, and electrode manufacturing method using the same

Abstract

The present invention relates to a discharge device provided for discharging the remaining cut material after cutting an electrode sheet in the width direction to form a plurality of electrodes, the device comprising: a discharge section provided for discharging the cut material to the outside; a discharge guide roller provided for transferring the cut material to the discharge section; and a meandering adjustment roller provided during the process of transferring the cut material to the discharge section, having a comb-like pattern formed on its surface to adjust the position of the cut material in contact with the roll surface in one direction or the other.

Description

Technical Field

[0001] The present invention relates to a discharge device, an electrode slitting system, and an electrode manufacturing method using the same, and more specifically, to a discharge device, an electrode slitting system, and an electrode manufacturing method using the same that can prevent disconnection of the cutting residue of an electrode sheet and minimize damage to the cut surface of the cut electrode.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0175713 filed on December 6, 2023, and all the contents disclosed in the literature of the Korean Patent Application are included as part of this specification.

Background Art

[0003] In recent years, rechargeable secondary batteries have been widely used as an energy source for wireless mobile devices. In addition, secondary batteries have also attracted attention as an energy source for electric vehicles, hybrid electric vehicles, etc., which are proposed as a solution to solve air pollution and the like of conventional gasoline vehicles, diesel vehicles, etc. that use fossil fuels. Therefore, the types of applications using secondary batteries are very diversified due to the advantages of secondary batteries, and it is expected that secondary batteries will be applied to more fields and products in the future than at present.

[0004] Such a secondary battery includes an electrode assembly in which electrodes and separator membranes are alternately laminated, and a case for accommodating the electrode assembly, and the electrode assembly has a structure in which a plurality of electrodes and a plurality of separator membranes are alternately laminated.

[0005] And the secondary battery includes an electrode manufacturing process for manufacturing electrodes, an electrode assembly assembling process for assembling an electrode assembly by laminating the manufactured electrodes and separator membranes, and a process for manufacturing a secondary battery by accommodating the manufactured electrode assembly in a case.

[0006] Figure 1 is a schematic diagram illustrating the operation of a conventional electrode slitting device (30). Figure 2 is a schematic diagram illustrating the cutting of an electrode sheet (10) by a conventional electrode slitting device (30).

[0007] Referring to Figures 1 and 2, in the electrode manufacturing process, the electrode sheet (10) supplied from the unwinder (31) is transferred to the electrode cutting unit (20) via the transfer roller (32). The electrode sheet (10) is moved in the transfer direction (F) between the upper blade (21) and lower blade (22) of the cutting unit (20), thereby cutting the electrode sheet (10) at regular intervals in the width direction to form multiple electrodes (11). Each of the electrodes formed by cutting is transferred along the lane and wound onto the electrode retrieval rewinder (34).

[0008] At this time, the electrode portion formed by cutting the electrode sheet is called the slitting lane, and the lane located in the edge portion excluding such slitting lanes is called the edge lane (12). Such edge lanes (12) are unnecessary parts that are not used as electrodes and are either immediately discharged to the outside or wound onto a waste rewinder (33) and collected before being discharged to the outside.

[0009] However, in conventional electrode manufacturing processes, if meandering adjustment or tension adjustment is not performed during the process in which the edge lane (12), which is created by trimming the edge of the electrode sheet (10), moves via the transfer roller (32), interference is likely to occur between the edge lane (12) and the adjacent slitting lane (11a) among the slitting lanes (11a, 11b). Such interference can cause the edge lane (12) to break, or if the distance between the edge lane (12) and the slitting lane (11a) becomes too large, serious damage can occur to the cut surface of the slitting lane. For example, damage to the cut surface of the slitting lane can result in a torn portion (tear), sharp metal burrs on the cut surface, or curls where the edge bends in a curved shape.

[0010] Therefore, improvements to the process and equipment are necessary to prevent interference between the edge lane and the slitting lane used as an electrode, which may occur during the cutting and discharge processes, and to improve the quality of the cut surface of the slitting lane. [Overview of the project] [Problems that the invention aims to solve]

[0011] The present invention aims to solve problems that arise in the conventional process of cutting electrode sheets and transporting the remaining material.

[0012] Through one embodiment of the present invention, it is possible to prevent wire breakage of the cutting residue due to interference between cut electrodes that occurs when meandering adjustment is not performed during the discharge process, and to prevent the distance between the cutting residue and the cut electrodes from becoming too wide, thereby preventing damage to the cut surface of the cut electrodes. This invention aims to provide a discharge device, an electrode slitting system, and an electrode manufacturing method using the same. [Means for solving the problem]

[0013] To achieve the aforementioned objectives, according to one embodiment of the present invention, a discharge device is provided for discharging the remaining cut residue after cutting an electrode sheet in the width direction to form a plurality of electrodes, the discharge device comprising: a discharge section provided for discharging the cut residue to the outside; a discharge guide roller provided for transferring the cut residue to the discharge section; and a meandering adjustment roller provided during the process of transferring the cut residue to the discharge section, having at least a portion of its surface structured to adjust the position of the cut residue in contact with the roll surface in one direction or the other.

[0014] The structured surface may include a comb-like pattern provided in a direction inclined with respect to the rotation axis of the meandering adjustment roller.

[0015] The meandering adjustment roller may include a rotating shaft provided to rotate in order to transmit rotational force to the cutting residue; and an elastic roll provided on the rotating shaft, on which the comb pattern is formed on its surface.

[0016] The meandering adjustment roller may have a first comb pattern on its surface, which is provided to move the position of the cutting residue in one direction on the meandering adjustment roller; and a second comb pattern, which is located away from the first comb pattern and is provided to move in the other direction on the meandering adjustment roller.

[0017] Furthermore, the first and second comb patterns can be provided such that they apply force to the cutting residue passing through each comb pattern in a direction that faces the center of the rotation axis of the meandering adjustment roller.

[0018] The first comb pattern is formed on one side of the meandering adjustment roller with respect to the center in the direction of rotation axis and is a comb pattern that slopes from one side toward the center, and the second comb pattern is formed on the other side of the meandering adjustment roller with respect to the center in the direction of rotation axis and is a comb pattern that slopes from the other side toward the center, and the area between the first comb pattern and the second comb pattern may be plain.

[0019] The system may further include a position adjustment unit provided to adjust the position of the meandering adjustment roller in one direction or the other.

[0020] The system may further include tension adjustment rollers provided to pressurize the cutting residue as it is being transported, in order to maintain a constant tension on the cutting residue wound around the discharge guide roller.

[0021] The discharge unit may include a suction unit provided to suck in the cutting residue and discharge it to the outside.

[0022] To achieve the aforementioned objectives, according to one embodiment of the present invention, an electrode slitting system is provided in which an electrode sheet is cut in the width direction to form a plurality of electrodes, comprising: a supply unit for supplying the electrode sheet; an electrode cutting unit for cutting the electrode sheet supplied from the supply unit in the width direction to form a plurality of electrodes; a winding unit equipped with a recovery roll for winding the plurality of electrodes; a transfer roller provided for transferring the plurality of electrodes to the winding unit; a discharge unit for discharging the remaining cutting residue from the electrode sheet to the outside; a discharge guide roller provided for transferring the cutting residue to the discharge unit; and a meandering adjustment roller provided in the electrode cutting unit during the transfer process of the discharge unit, having at least a portion of its surface structured to adjust the position of the cutting residue in contact with the roll surface in one direction or the other.

[0023] The structured surface may include a comb-like pattern provided in a direction inclined with respect to the rotation axis of the meandering adjustment roller.

[0024] The meandering adjustment roller may include a rotating shaft provided to rotate in order to transmit a rotational force to the cutting residue; and an elastic roll provided on the rotating shaft and having the comb pattern formed on the surface thereof.

[0025] The meandering adjustment roller is provided with a first comb pattern provided to move the position of the cutting residue in one direction on the meandering adjustment roller and a second comb pattern located apart from the first comb pattern and provided to move in the other direction on the meandering adjustment roller in order to adjust the meandering of the cut portion of the electrode sheet, and the second comb pattern can be formed on the surface.

[0026] Also, the first comb pattern and the second comb pattern can be provided to apply respective forces to the cutting residue passing through each comb pattern in a direction facing the center in the rotational axis direction of the meandering adjustment roller.

[0027] The meandering adjustment roller may further include a position adjustment unit provided to adjust the position of the meandering adjustment roller in one direction or the other direction.

[0028] The meandering adjustment roller may further include a tension adjustment roller provided to pressurize the cutting residue transferred in order to maintain a constant tension of the cutting residue wound around the discharge guide roller.

[0029] The discharge unit may include a suction unit provided to suck the cutting residue and discharge it to the outside.

[0030] To achieve the aforementioned objectives, according to one embodiment of the present invention, a method for manufacturing a plurality of electrodes by cutting an electrode sheet using a slitting system including a supply unit, an electrode cutting unit, a winding unit, a transfer roller, a discharge unit, a discharge guide roller, and a meandering adjustment roller is provided, comprising: a supply step in which the supply unit supplies the electrode sheet to the electrode cutting unit; a forming step in which the electrode cutting unit cuts the supplied electrode sheet in the width direction to form a plurality of electrodes; a winding transfer step in which the winding unit transfers the formed plurality of electrodes; a winding recovery step in which the winding unit winds up the formed plurality of electrodes; a discharge transfer step in which the discharge guide roller cuts the electrode sheet and transfers the remaining cutting residue to the discharge unit; a meandering adjustment step in which the meandering adjustment roller adjusts the position of the cutting residue that contacts the roll surface in one direction or the other during the transfer process of the electrode cutting unit to the discharge unit; and a final discharge step in which the discharge unit discharges the cutting residue to the outside. [Effects of the Invention]

[0031] Through one embodiment of the present invention, the discharge device of the present invention can prevent wire breakage caused by interference between severed electrodes that occur because meandering adjustment is not performed during the discharge process.

[0032] Furthermore, the present invention has the advantage of effectively improving the quality of the electrode by preventing the distance between the cutting residue and the cut electrode from becoming too large, and by preventing damage to the cut surface of the cut electrode. [Brief explanation of the drawing]

[0033] [Figure 1] This is a schematic diagram illustrating the general configuration of a conventional electrode slitting device. [Figure 2] This is a schematic diagram illustrating the process of cutting an electrode sheet using a conventional electrode slitting device. [Figure 3] This is a schematic diagram illustrating an electrode slitting system including a discharge device according to one embodiment of the present invention. [Figure 4] This is a schematic perspective view showing the meandering adjustment roller of a discharge device according to one embodiment of the present invention. [Figure 5] This is a schematic perspective view showing how the meandering of a discharge device according to one embodiment of the present invention is adjusted via a meandering adjustment roller. [Figure 6] This is a schematic perspective view showing how the meandering of a discharge device according to another embodiment of the present invention is adjusted via a meandering adjustment roller. [Figure 7] This is a flowchart illustrating a method for manufacturing multiple electrodes according to one embodiment of the present invention. [Modes for carrying out the invention]

[0034] Hereinafter, an embodiment of the present invention, including an discharge device and an electrode slitting system, will be described in detail with reference to the attached drawings.

[0035] Furthermore, regardless of the reference numerals used in the drawings, identical or corresponding components will be assigned the same or similar reference numerals, and redundant explanations for them will be omitted. For the sake of clarity, the size and shape of each component shown in the illustrations may be exaggerated or reduced.

[0036] Figure 3 is a schematic diagram illustrating an electrode slitting system (200) including a discharge device (100) according to one embodiment of the present invention. Figure 4 is a schematic perspective view illustrating the meandering adjustment roller (130) of the discharge device (100) according to one embodiment of the present invention. And Figure 5 is a schematic perspective view illustrating how the meandering adjustment is performed via the meandering adjustment roller (130) of the discharge device (100) according to one embodiment of the present invention.

[0037] Referring to Figures 3 to 5, the discharge device (100) according to one embodiment of the present invention can be configured to discharge the remaining cut residue (12) after cutting the electrode sheet (10) in the width direction to form a plurality of electrodes (11), excluding the plurality of electrodes (11).

[0038] Therefore, the discharge device (100) of the present invention includes a discharge section (110), a discharge roller (120), and a meandering adjustment roller (130). Specifically, the discharge section (110) can be configured to discharge the cutting residue (12) to the outside. For example, the discharge section (110) can transport the acquired cutting residue (12) to an external waste storage facility along a suction pipe (not shown) using a suction method. Therefore, the discharge section (110) can include a negative pressure pump that generates negative pressure. For example, the negative pressure pump may be a diaphragm pump, a rotary pump, a vacuum pump, etc.

[0039] Furthermore, the discharge roller (120) may be provided to transfer the cutting residue (12) to the discharge section (110). Specifically, the discharge roller (120) includes a roll that supports and moves the cutting residue (12). The discharge roller (120) is equipped with a support base (not shown) that supports the roll. The discharge roller (120) is equipped with a drive device (not shown) that rotates the rotation axis (131) of the roll.

[0040] Furthermore, the meandering adjustment roller (130) may be provided during the process of transferring the cutting residue (12) to the discharge section (110). The meandering adjustment roller (130) may have a structured surface in at least a portion of its area to adjust the position of the cutting residue (12) in contact with the roll surface by shifting it in one direction or the other. Here, the structured surface can be generated by processing it into an embossed (protrusion) / intaglio (groove) pattern using laser processing, CNC processing, etc., modifying the surface properties, or generating a specific pattern by methods such as vapor deposition, coating, or printing. However, it is not necessarily limited to these processing methods, and any general method for processing the roll surface can be applied. Furthermore, the roughness of the structured surface must be set to a level that does not induce breakage of the cutting residue (12).

[0041] For example, the meandering adjustment roller (130) can be configured to shift the cutting residue (12) located on the surface in one direction (positive direction of the X-axis) or the other direction (negative direction of the X-axis) in the direction of the rotation axis (131).

[0042] The meandering adjustment roller (130) can form a comb-like pattern (133) on its roll surface for meandering adjustment. The comb-like pattern (133) of the meandering adjustment roller (130) can generate frictional force in one direction or the other with the cut residue (12) being transported. That is, the meandering adjustment roller (130) can guide the cut residue (12) to shift in the direction in which the comb-like pattern (133) is inclined.

[0043] Therefore, the discharge device (100) of the present invention has the advantage of being able to effectively improve the quality of the electrodes (11) because it can prevent wire breakage caused by interference between the cut electrodes (11) (slitting lanes) that occurs when meandering adjustment is not performed during the discharge process of the cut residue (12), and can also prevent the distance between the cut residue (12) (edge ​​lane) and the cut electrodes (11) (slitting lane) from becoming too wide, thereby preventing damage to the cut surface of the cut electrodes (11) (slitting lane).

[0044] The meandering adjustment roller (130) also includes a rotating shaft (131) and an elastic roll (132). The rotating shaft (131) may be configured to rotate in order to transmit rotational force to the cutting residue (12). The meandering adjustment roller (130) may include a drive unit (not shown) that applies rotational force to the rotating shaft (131). The meandering adjustment roller (130) may also include an elastic roll (132) provided on the rotating shaft (131). The elastic roll (132) may have a comb-like pattern (133) formed on its surface. For example, the elastic roll (132) may be a silicone roll or a rubber roll. The rubber may be, for example, natural rubber or synthetic rubber.

[0045] Therefore, the discharge device (100) of the present invention includes a meandering adjustment roller (130) which includes an elastic roll (132), thereby generating a constant frictional force on the electrode sheet (10) to enable precise meandering adjustment, and the soft surface minimizes wear on the electrode sheet (10).

[0046] Furthermore, the meandering adjustment roller (130) includes a first comb pattern (133a) provided to move the position of the cutting residue (12a) in one direction (the positive direction of the X axis). The first comb pattern (133a) can be formed on one side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131). The first comb pattern (133a) may also be a comb pattern (133) that is inclined from the other side toward the center.

[0047] The meandering adjustment roller (130) includes a second comb pattern (133b) provided to move the position of the cut residue (12c) in the other direction (negative direction of the X-axis). The second comb pattern (133b) can be located apart from the first comb pattern (133a). That is, the second comb pattern (133b) can be formed on the other side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131). The second comb pattern (133b) may be a comb pattern (133) that is inclined from one side toward the center.

[0048] Furthermore, the first comb pattern (133a) and the second comb pattern (133b) can be provided such that they apply their respective forces to the cutting residue passing through each comb pattern in a direction toward the center of the rotation axis of the meandering adjustment roller.

[0049] Specifically, referring to Figure 5, the first comb pattern (133a) is formed on one side with respect to the center in the direction of the rotation axis (131) of the meandering adjustment roller (130), and can be provided so as to apply force to the cutting residue passing through the first comb pattern (133a) in a direction toward the center in the direction of the rotation axis of the meandering adjustment roller.

[0050] Furthermore, the second comb pattern (133b) is formed on the other side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131), and can be provided so as to apply force to the cutting residue passing through the second comb pattern (133b) in a direction toward the center in the direction of the rotation axis of the meandering adjustment roller.

[0051] Furthermore, the area between the first comb pattern (133a) and the second comb pattern (133b) formed on the roll surface may be plain (130a). In other words, the plain (130a) portion is the part where the cut residue (12b) is not adjusted to meander in any direction.

[0052] Furthermore, the discharge device (100) of the present invention may include a position adjustment unit (135) provided to adjust the position of the meandering adjustment roller (130) in one direction or the other. The position adjustment unit (135) may include a dial (135a) provided so that an operator can manually adjust the position of the meandering adjustment roller (130). For example, if an operator manually rotates the dial (135a) clockwise, the position of the roll of the meandering adjustment roller (130) can be moved in the X-axis direction. Conversely, if an operator manually rotates the dial (135a) counterclockwise, the position of the roll of the meandering adjustment roller (130) can be moved in the opposite direction in the X-axis direction. Therefore, by including the position adjustment unit (135), the discharge device (100) of the present invention can precisely adjust the position of the meandering adjustment roller (130), enabling more precise meandering adjustment.

[0053] Furthermore, the discharge device (100) of the present invention may include a tension adjustment roller (140). The tension adjustment roller (140) may be provided to pressurize the cut residue (12) being transported in order to maintain a constant tension in the cut residue (12) wound around the discharge roller (120). The tension adjustment roller (140) may include a nip roll. The nip roll may be made of, for example, rubber.

[0054] Furthermore, the discharge device (100) of the present invention may further include a suction unit (115). The suction unit (115) may be configured to suck in the cutting residue (12) and discharge it to the outside. The suction unit (115) may have an air intake (115a) for drawing in air. Therefore, the discharge device of the present invention can effectively collect the cutting residue (12) using the suction unit (115) and effectively suck in and remove fragments, dust, etc. generated in the cutting process.

[0055] On the other hand, this application provides an electrode slitting system (200) according to one embodiment of the present invention. Specifically, the electrode slitting system (200) is a system that forms a plurality of electrodes (11) by cutting an electrode sheet (10) in the width direction (W) perpendicular to the running direction (F) of the electrode sheet (10), as shown in Figure 2. The electrode slitting system (200) also includes a supply unit (210) for supplying the electrode sheet (10) for this purpose. The supply unit (210) includes a drive unit (211) that drives the unwinding machine together with the unwinding machine.

[0056] The electrode slitting system (200) includes an electrode cutting unit (220) that cuts an electrode sheet (10) supplied from a supply unit (210) in the width direction to form a plurality of electrodes (11). The electrode slitting system (200) includes a winding unit (230) equipped with a recovery roll for winding up the plurality of electrodes (11). The winding unit (230) includes a drive unit (231) that drives the winding machine together with the winding machine.

[0057] The electrode slitting system (200) also includes a transfer roller (240) provided for transferring a plurality of electrodes (11) to a winding section (230). The electrode slitting system (200) also includes a discharge section (110) for cutting the electrode sheet (10) and discharging the remaining cut residue (12) to the outside. The electrode slitting system (200) also includes a discharge roller (120) provided for transferring the cut residue (12) to the discharge section (110).

[0058] The electrode slitting system (200) also includes a meandering adjustment roller (130). The meandering adjustment roller (130) may be provided in the electrode cutting section (220) during the transfer process to the discharge section (110). The meandering adjustment roller (130) has a surface that is structured in at least a portion of its area to adjust the position of the cutting residue (12) in contact with the roll surface in one direction or the other. Here, the structured surface may be a surface on which a comb-like pattern (133) is formed.

[0059] Therefore, the electrode slitting system (200) of the present invention, by including a meandering adjustment roller (130), can prevent wire breakage caused by interference between cut electrodes (11) (slitting lanes) that occurs when meandering adjustment is not performed during the discharge process of the cut residue (12), and can also prevent the distance between the cut residue (12) (edge ​​lane) and the cut electrodes (11) (slitting lanes) from becoming too wide, thereby preventing damage to the cut surface of the cut electrodes (11) (slitting lanes), and thus has the advantage of effectively improving the quality of the electrodes.

[0060] Furthermore, the meandering adjustment roller (130) includes a rotating shaft (131) that is provided to rotate in order to transmit rotational force to the cutting residue (12). This rotating shaft (131) may include an elastic roll (132) having a comb-like pattern (133) formed on its surface. Here, the rotating shaft (131) and elastic roll (132) of the meandering adjustment roller (130) are similar to or identical to the rotating shaft (131) and elastic roll (132) of the meandering adjustment roller (130) of the discharge device (100) described above, so a detailed explanation will be omitted.

[0061] Furthermore, the meandering adjustment roller (130) can have a first comb pattern (133a) on its surface, which is provided to move the position of the cut-off portion (12) in one direction on the meandering adjustment roller (130), and a second comb pattern (133b) on its surface, which is provided to move it in the other direction on the meandering adjustment roller (130), in order to adjust the meandering of the cut-off portion of the electrode sheet (10).

[0062] Furthermore, the first comb pattern (133a) is formed on one side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131), and is a comb pattern (133) that slopes from one side toward the center, and the second comb pattern (133b) is formed on the other side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131), and is a comb pattern (133) that slopes from the other side toward the center, and the area between the first comb pattern (133a) and the second comb pattern (133b) on the roll surface may be plain (130a).

[0063] Specifically, referring to Figure 5, the first comb pattern (133a) is formed on one side with respect to the center in the direction of the rotation axis (131) of the meandering adjustment roller (130), and can be provided so as to apply force to the cutting residue passing through the first comb pattern (133a) in a direction toward the center in the direction of the rotation axis of the meandering adjustment roller.

[0064] Furthermore, the second comb pattern (133b) is formed on the other side of the meandering adjustment roller (130) with respect to the center in the direction of the rotation axis (131), and can be provided so as to apply force to the cutting residue passing through the second comb pattern (133b) in a direction toward the center in the direction of the rotation axis of the meandering adjustment roller.

[0065] Furthermore, the electrode slitting system (200) of the present invention may further include a position adjustment unit (135) provided to adjust the position of the meandering adjustment roller (130) in one direction or the other. Here, the position adjustment unit (135) is similar to or identical to the position adjustment unit (135) of the discharge device (100) described above, so a detailed explanation is omitted.

[0066] Furthermore, the electrode slitting system (200) of the present invention may further include a tension adjustment roller (140) provided to pressurize the cut residue (12) as it is being transported in order to maintain a constant tension in the cut residue (12) wound around the discharge roller (120). Here, the tension adjustment roller (140) is similar to or identical to the tension adjustment roller (140) of the discharge device (100) described above, so a detailed explanation is omitted.

[0067] Furthermore, the discharge section (110) may include a suction unit (115) provided to suck in the cutting residue (12) and discharge it to the outside. Here, the suction unit (115) is similar to or identical to the suction unit (115) of the discharge device (100) described above, so a detailed explanation is omitted.

[0068] Figure 6 is a schematic perspective view showing how the meandering of a discharge device according to another embodiment of the present invention is adjusted via a meandering adjustment roller.

[0069] Referring to Figure 6, another embodiment of the discharge device (100) of the present invention may further include a position sensing unit (150) (not shown) that senses the position of the cutting residue (12c) on the serpentine adjustment roller (130), along with a position adjustment unit (135) that adjusts the position of the serpentine adjustment roller (130). For example, the position sensing unit (150) may include a camera (151) that photographs the cutting residue (12c) and the serpentine adjustment roller (130), and an analysis unit (not shown) that analyzes the image generated through such a camera (151) to analyze the extent to which the cutting residue (12c) is out of the proper position. For example, the analysis unit may be a computing device capable of analyzing the contents of an image file.

[0070] For example, if the position sensing unit (150) detects that the cut residue (12c) has not moved from the position set on the meandering adjustment roller (130), it can control the position adjustment unit (135) to adjust the position of the meandering adjustment roller (130) in the direction of rotation.

[0071] As a result, the discharge device (100) of the present invention can perform more precise meandering adjustment by further including a position sensing unit (150).

[0072] Figure 7 is a flowchart showing a method for manufacturing multiple electrodes according to one embodiment of the present invention.

[0073] Referring again to Figures 3 to 5 and Figure 7, the present invention provides a method for manufacturing multiple electrodes (11) by cutting an electrode sheet (10). Specifically, the method for manufacturing electrodes (11) of the present invention uses an electrode slitting system (200) including a supply unit (210), an electrode cutting unit (220), a winding unit (230), a transfer roller (240), a discharge unit (110), a discharge roller (120), and a meandering adjustment roller (130) to cut an electrode sheet (10) and manufacture multiple electrodes (11).

[0074] More specifically, the method for manufacturing the electrode (11) of the present invention includes a supply step (M01). In the supply step (M01), the supply unit (210) supplies the electrode sheet (10) to the electrode cutting unit (220).

[0075] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a forming step (M02). In the forming step (M02), the electrode cutting portion (220) cuts the supplied electrode sheet (10) in the width direction to form a plurality of electrodes (11).

[0076] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a winding and transfer step (M03). The winding and transfer step (M03) involves transferring the plurality of electrodes (11) formed on the winding section (230).

[0077] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a winding and retrieval step (M04). In the winding and retrieval step (M04), the winding unit (230) winds up the plurality of electrodes (11) that have been formed.

[0078] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a discharge and transfer step (M05). In the discharge and transfer step (M05), a discharge roller (120) cuts the electrode sheet (10) and transfers the remaining cut residue (12) to the discharge section (110).

[0079] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a meandering adjustment step (M06). In the meandering adjustment step (M06), the meandering adjustment roller (130) adjusts the position of the cutting residue (12) that comes into contact with the roll surface in one direction or the other while the electrode cutting section (220) is being transported to the discharge section (110).

[0080] Furthermore, the method for manufacturing the electrode (11) of the present invention includes a final discharge step (M07). In the final discharge step (M07), the discharge unit (110) can discharge the cutting residue (12) to the outside.

[0081] For example, the winding transfer stage (M03) and the winding recovery stage (M04), along with the discharge transfer stage (M05), the meandering adjustment stage (M06), and the final discharge stage (M07), can proceed simultaneously. That is, the formed electrode (11) can be transferred for winding, while the generated cutting residue (12) can be discharged for disposal.

[0082] Therefore, the method for manufacturing the electrode (11) of the present invention, by including a meandering adjustment step (M06), can prevent wire breakage due to interference between the cut electrodes (11) (slitting lanes) that occurs when meandering adjustment is not performed during the discharge process of the cut residue (12), and can also prevent the distance between the cut residue (12) (edge ​​lane) and the cut electrodes (11) (slitting lanes) from becoming too wide, thereby preventing damage to the cut surface of the cut electrodes (11) (slitting lanes), and thus has the advantage of effectively improving the quality of the electrode (11).

[0083] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and a person skilled in the art with ordinary skill in the invention will know that various modifications, changes, and additions are possible within the spirit and scope of the invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims. [Industrial applicability]

[0084] Through one embodiment of the present invention, the discharge device of the present invention can prevent wire breakage caused by interference between severed electrodes that occur because meandering adjustment is not performed during the discharge process.

Claims

1. This discharge device is provided to discharge the remaining cut material after cutting an electrode sheet in the width direction to form multiple electrodes, excluding the multiple electrodes. A discharge section provided to discharge the aforementioned cutting residue to the outside; A discharge guide roller provided to transfer the cutting residue to the discharge section; and, A discharge device comprising: a meandering adjustment roller having at least a portion of its surface structured to adjust the position of the cutting residue in contact with the roll surface in one direction or the other, during the process of transferring the cutting residue to the discharge section;

2. The structured surface is The discharge device according to claim 1, further comprising a comb-like pattern provided in a direction inclined with respect to the rotation axis of the meandering adjustment roller.

3. The aforementioned meandering adjustment roller is A rotating shaft provided to rotate in order to transmit rotational force to the aforementioned cutting residue; and The discharge device according to claim 2, comprising an elastic roll provided on the rotating shaft and having the comb pattern formed on its surface.

4. The aforementioned meandering adjustment roller is A first comb-like pattern is provided on the meandering adjustment roller to move the position of the cut residue in one direction; and A second comb pattern is formed on the surface, located separately from the first comb pattern and provided to move in the other direction on the meandering adjustment roller. The discharge device according to claim 2, wherein the first comb pattern and the second comb pattern are provided to apply force to the cutting residue passing through each comb pattern in a direction toward the center in the rotation axis direction of the meandering adjustment roller.

5. The first comb pattern is, The comb-like pattern is formed on one side of the meandering adjustment roller with respect to the center in the direction of the rotation axis, and is inclined from one side toward the center. The second comb pattern is, The comb-like pattern is formed on the other side of the meandering adjustment roller, with the center in the direction of the rotation axis as the reference point, and is inclined from the other side toward the center. The discharge device according to claim 4, wherein the space between the first comb pattern and the second comb pattern is plain.

6. The discharge device according to any one of claims 2 to 5, further comprising a position adjustment unit provided for adjusting the position of the meandering adjustment roller in one direction or the other.

7. The discharge device according to any one of claims 2 to 5, further comprising a tension adjustment roller provided to pressurize the cutting residue as it is transported in order to maintain a constant tension on the cutting residue wound around the discharge guide roller.

8. In an electrode slitting system that cuts an electrode sheet in the width direction to form multiple electrodes, A supply unit that supplies the electrode sheet; An electrode cutting unit that cuts the electrode sheet supplied from the supply unit in the width direction to form multiple electrodes; A winding section equipped with a recovery roll for winding the plurality of electrodes; A transfer roller provided to transfer the plurality of electrodes to the winding section; A discharge unit for cutting the electrode sheet and discharging the remaining cut material to the outside; A discharge guide roller provided to transfer the cutting residue to the discharge section; and, An electrode slitting system comprising: a meandering adjustment roller having a surface with at least a portion of its surface structured to adjust the position of the cut residue in contact with the roll surface in one direction or the other, provided in the electrode cutting section during the transfer process of the discharge section;

9. The structured surface is The electrode slitting system according to claim 8, further comprising a comb-like pattern provided in a direction inclined with respect to the rotation axis of the meandering adjustment roller.

10. The aforementioned meandering adjustment roller is A rotating shaft provided to rotate in order to transmit rotational force to the aforementioned cutting residue; and The electrode slitting system according to claim 9, comprising an elastic roll provided on the rotating shaft and having the comb pattern formed on its surface.

11. The aforementioned meandering adjustment roller is A first comb pattern is provided on the meandering adjustment roller to move the position of the cut-off portion of the electrode sheet in one direction in order to adjust the meandering of the cut-off portion; and A second comb-like pattern is formed on the surface, which is provided to move in the other direction on the aforementioned meandering adjustment roller. The electrode slitting system according to claim 9, wherein the first comb pattern and the second comb pattern are provided to apply their respective forces to the cutting residue passing through the respective comb pattern in a direction toward the center in the rotation axis direction of the meandering adjustment roller.

12. The first comb pattern is, The comb-like pattern is formed on one side of the meandering adjustment roller with respect to the center in the direction of the rotation axis, and is inclined from one side toward the center. The second comb pattern is, The comb-like pattern is formed on the other side of the meandering adjustment roller, with the center in the direction of the rotation axis as the reference point, and is inclined from the other side toward the center. The electrode slitting system according to claim 11, wherein the space between the first comb pattern and the second comb pattern is plain.

13. The electrode slitting system according to any one of claims 9 to 12, further comprising a position adjustment unit provided for adjusting the position of the meandering adjustment roller in one direction or the other.

14. The electrode slitting system according to any one of claims 9 to 12, further comprising a tension adjustment roller provided to pressurize the cutting residue as it is transported in order to maintain a constant tension on the cutting residue wound around the discharge guide roller.

15. In a method for manufacturing multiple electrodes by cutting an electrode sheet using a slitting system that includes a supply unit, an electrode cutting unit, a winding unit, a transfer roller, a discharge unit, a discharge guide roller, and a meandering adjustment roller, A supply step in which the supply unit supplies the electrode sheet to the electrode cutting unit; Forming step in which the electrode cutting section cuts the supplied electrode sheet in the width direction to form a plurality of electrodes; A winding transfer step in which the plurality of electrodes formed on the winding section are transferred; A winding and retrieval step in which the winding unit winds up the plurality of electrodes formed; Discharge and transfer step in which the discharge guide roller cuts the electrode sheet and transfers the remaining cut material to the discharge section; A meandering adjustment step in which the meandering adjustment roller adjusts the position of the cut residue that comes into contact with the roll surface in one direction or the other during the transfer process of the discharge section at the electrode cutting section; and An electrode manufacturing method comprising a final discharge step in which the discharge unit discharges the cutting residue to the outside.

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