Electrode notching device and electrode manufacturing method

Abstract

The present invention discloses an electrode notching device and an electrode manufacturing method. The electrode notching device of the present invention includes: a notch portion for forming an electrode tab in a plain portion of an electrode sheet; a rewinder roller around which a connecting sheet is wound; a splicing table disposed between the notch portion and the rewinder roller and on which the electrode sheet and the connecting sheet are seated; a camera unit for photographing the positions of the electrode sheet and the connecting sheet seated on the splicing table; a guide pointer unit for indicating a first reference position of the electrode sheet and a second reference position of the connecting sheet; and a position alignment unit for aligning the positions of the splicing table and the rewinder roller so that the electrode sheet coincides with the first reference position and the connecting sheet coincides with the second reference position.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0126917 dated October 5, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to an electrode notching device and an electrode manufacturing method that can accurately connect an electrode sheet when replacing the electrode sheet, prevent loss of the electrode sheet, and shorten the time required to connect the electrode sheet. [Background technology]

[0003] Typically, secondary batteries include a positive electrode, a negative electrode, and an electrolyte, and generate electrical energy through a chemical reaction. The use of secondary batteries is gradually increasing due to their advantage of being rechargeable. Among these secondary batteries, lithium secondary batteries, due to their high energy density per unit weight, are widely used as power sources for electronic communication devices and as driving sources for high-power hybrid and electric vehicles.

[0004] In terms of shape, there is an increasing demand for prismatic and pouch-type secondary batteries that are thin and applicable to products such as mobile phones. In terms of materials, there is an increasing demand for lithium secondary batteries such as lithium-ion batteries and lithium-ion polymer batteries that have high energy density, stable discharge voltage, and stable output.

[0005] The electrode sheet is unwound from the unwinder and fed to a notching module, which forms electrode tabs at equal intervals on the uncoated portions of the electrode. The electrode with the electrode tabs formed is then further wound up on the rewinder.

[0006] The unwinder cuts the existing electrodes and attaches new electrodes each time a new electrode sheet is installed. The rewinder replaces the bobbin with a new one. In this case, the rewinder cuts the existing electrodes and then connects them to the connecting film (PET) and electrodes.

[0007] However, in conventional processes, because an operator manually connects electrodes to a rewinder, differences in the alignment and connection spacing of the electrode's connection parts can occur depending on the operator's level of skill. Furthermore, when differences in the alignment and connection spacing of the electrode's connection parts occur, the tension of the electrode varies along the electrode's width, which can lead to electrode meandering. Furthermore, electrode meandering can cause various defects, such as deviations in the electrode's winding position on the rewinder. Furthermore, when an electrode defect occurs, an additional process must be performed: discarding the electrode and connecting a new electrode, which can increase the average process time.

[0008] In addition, the process also involves a process in which the worker measures the distance between the electrode and the connecting part of the electrode to align it with the winding position. Furthermore, when connecting the connecting film to the electrode, the width of the connecting film is larger than the width of the electrode, so the electrode must be positioned at the center of the connecting film. This process can increase the average process time and increase work losses depending on the worker's skill level.

[0009] The background art of the present invention is disclosed in Korean Patent Publication No. 2020-0109041 (published on September 22, 2020, title of invention: Method and device for cutting out electrode substrate) (Patent Document 1). [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Korean Patent Publication No. 2020-0109041 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been devised to solve the above-mentioned problems, and aims to provide an electrode notching device and an electrode manufacturing method that allow the connection position of the electrode sheet to be accurately and visually confirmed.

[0012] An object of the present invention is to provide an electrode notching device and an electrode manufacturing method that can correct the connection position between an electrode sheet and a connection sheet.

[0013] An object of the present invention is to provide an electrode notching device and an electrode manufacturing method that can significantly reduce the time required for a worker to perform connection work.

[0014] The present invention aims to provide an electrode notching device and an electrode manufacturing method that can ensure uniformity in the work of connecting an electrode sheet and a connecting sheet, almost regardless of the skill level of the worker.

[0015] The technical object of the present invention is not limited to the above-mentioned objects, and other unmentioned objects and advantages of the present invention can be understood from the following description and can be more clearly understood from the embodiments of the present invention. Furthermore, it will be easily understood that the objects and advantages of the present invention can be achieved by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0016] In order to solve the above-mentioned problems, the electrode notching device of the present invention includes: a notch portion for forming an electrode tab in a plain portion of an electrode sheet; a rewinder roller around which a connecting sheet is wound; a splicing table disposed between the notch portion and the rewinder roller and on which the electrode sheet and the connecting sheet are seated; a camera unit for photographing the positions of the electrode sheet and the connecting sheet seated on the splicing table; a guide pointer unit for displaying a first reference position of the electrode sheet and a second reference position of the connecting sheet; and a position alignment unit for aligning the positions of the splicing table and the rewinder roller so that the electrode sheet coincides with the first reference position and the connecting sheet coincides with the second reference position.

[0017] The splicing table may include a fixed table on which the electrode sheet is placed, and an alignment table disposed between the fixed table and the rewinder roller and movable in the width direction of the electrode sheet by the position alignment unit so that the electrode sheet is aligned at a first reference position.

[0018] A first fixing bar may be installed above the fixing table to fix the electrode sheet, and a second fixing bar may be installed above the alignment table to fix the electrode sheet.

[0019] The position alignment unit may further include a table alignment unit that aligns the position of the splicing table so that the electrode sheet coincides with the first reference position, and a rewinder alignment unit that aligns the position of the rewinder roller so that the connecting sheet coincides with the second reference position.

[0020] The splicing table may be made of a light-transmitting material.

[0021] The electrode notching device may further include a light irradiation unit that irradiates the splicing table with light.

[0022] The light irradiation unit may be disposed below the splicing table.

[0023] The guide pointer unit may include a first guide pointer that displays the first reference position on the splicing table, and a second guide pointer that displays the second reference position on the splicing table or the rewinder roller.

[0024] The first guide pointer and the second guide pointer may irradiate light in a sector shape on both sides of the width direction of the electrode sheet to indicate the first reference position and the second reference position.

[0025] At least one of the first guide pointer and the second guide pointer may be located below the splicing table.

[0026] When the connecting sheet is a connecting electrode, the first guide pointer may indicate the first reference position so that the electrode sheet and the connecting electrode are aligned, and the second guide pointer may indicate the second reference position so that the connecting electrode is wound at the center of the rewinder roller in the longitudinal direction.

[0027] When the connecting sheet is a connecting film, the first guide pointer may indicate the first reference position so that the electrode sheet is positioned at the center of the connecting film in the width direction, and the second guide pointer may indicate the second reference position so that the connecting film is wound at the center of the rewinder roller in the length direction.

[0028] The camera unit may be a sector-shaped camera unit arranged side by side in the width direction of the electrode sheet and the connecting sheet.

[0029] The camera unit may be disposed below the splicing table.

[0030] The electrode notching device may further include a foreign matter removal unit installed on the splicing table to remove foreign matter generated when the electrode sheet and the connecting sheet are cut.

[0031] The foreign matter removal unit may include an air suction unit disposed on the splicing table, and an air blower connected to the air suction unit to provide a suction force to the air suction unit.

[0032] The electrode manufacturing method of the present invention includes a seating step of seating an electrode sheet and a connecting sheet on a splicing table; a photographing step of photographing the positions of the electrode sheet and the connecting sheet seated on the splicing table with a camera unit; a display step of displaying a first reference position of the electrode sheet and a second reference position of the connecting sheet with a guide pointer unit; and an alignment step of aligning the positions of the splicing table and a rewinder roller with a position alignment unit so that the electrode sheet coincides with the first reference position and the connecting sheet coincides with the second reference position.

[0033] In the displaying step, the guide pointer unit may irradiate light to both widthwise sides of the electrode sheet and the connecting sheet to display the first reference position and the second reference position.

[0034] In the displaying step, the first reference positions may be spaced apart by a distance equal to a width of the electrode sheet, and the second reference positions may be spaced apart by a distance equal to a width of the connecting sheet.

[0035] In the display step, a first guide pointer of the guide pointer unit can display a first reference position on the splicing table, and a second guide pointer of the guide pointer unit can display a second reference position on the rewinder roller.

[0036] The first guide pointer and the second guide pointer may irradiate light in a sector shape on both sides of the width direction of the electrode sheet to indicate the first reference position and the second reference position.

[0037] When the connecting sheet is a connecting electrode, the first guide pointer may indicate the first reference position so that the electrode sheet and the connecting electrode are aligned, and the second guide pointer may indicate the second reference position so that the connecting electrode is wound at the center of the rewinder roller in the longitudinal direction.

[0038] In the photographing step, the control unit can read a first distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the connecting electrode, a second distance between an end of an electrode tab of the electrode sheet and an electrode tab of the connecting electrode, a third distance between an end of an electrode tab of the electrode sheet and the other lengthwise end of the rewinder roller, and a fourth distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the rewinder roller.

[0039] When the connecting sheet is a connecting film, the first guide pointer may indicate the first reference position so that the electrode sheet is positioned at the center of the connecting film in the width direction, and the second guide pointer may indicate the second reference position so that the connecting film is wound at the center of the rewinder roller in the length direction.

[0040] In the photographing step, the control unit can read a first distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the connecting film, a second distance between an end of an electrode tab of the electrode sheet and the other widthwise end of the connecting film, a third distance between an end of an electrode tab of the electrode sheet and the other lengthwise end of the rewinder roller, and a fourth distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the rewinder roller.

[0041] In the alignment step, a table alignment unit of the position alignment unit aligns the position of the splicing table to align the electrode sheet with the first reference position, and a rewinder alignment unit of the position alignment unit aligns the position of the rewinder roller to align the connecting sheet with the second reference position. [Effects of the Invention]

[0042] According to the present invention, the guide pointer portion indicates the first reference position of the electrode sheet and the second reference position of the connecting sheet, so that the connecting positions of the electrode sheets can be confirmed accurately and visually.

[0043] According to the present invention, the camera unit reads the positions of the electrode sheet and the connection sheet, and the control unit controls the position alignment unit to correct the connection position between the electrode sheet and the connection sheet, thereby allowing the electrode sheet and the connection sheet to be accurately positioned at the connection position.

[0044] According to the present invention, when the splicing table and the rewinder roller are aligned, the electrode sheet and the connecting sheet can be accurately aligned with the first reference position and the second reference position.

[0045] According to the present invention, the electrode sheet and the connecting sheet are accurately aligned with the first reference position and the second reference position, so that the time required for the worker to perform the connecting operation can be significantly reduced.

[0046] According to the present invention, uniformity in the work of connecting electrode sheets and connecting sheets can be ensured, almost regardless of the skill level of the worker.

[0047] The above-mentioned effects and specific effects of the present invention will be described in conjunction with the following description of the preferred embodiment of the invention. [Brief explanation of the drawings]

[0048] [Figure 1] 1 is a diagram illustrating an electrode notch device according to the present invention; [Figure 2]1 is a plan view schematically showing an electrode notching device according to the present invention; [Figure 3] 1 is a side view schematically showing an electrode notching device according to the present invention; [Figure 4] 1 is a front view schematically showing an electrode notching device according to the present invention; [Figure 5] 10 is a plan view schematically illustrating a state in which a splicing table and a rewinder roller in an electrode notching device according to the present invention align an electrode sheet and a connecting sheet. FIG. [Figure 6] 1 is a plan view showing how to position an electrode sheet and a connecting electrode in an electrode notch device according to the present invention. FIG. [Figure 7] 10 is a plan view schematically showing a positional difference between an electrode sheet and a connecting electrode in an electrode notch device according to the present invention; FIG. [Figure 8] 10 is a plan view showing the positioning of the electrode sheet and the connecting film in the electrode notch device according to the present invention. FIG. [Figure 9] 1 is a flowchart that schematically illustrates an electrode manufacturing method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0049] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0050] The present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms and with various modifications. However, the present embodiments are provided to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. Therefore, it should be understood that the present invention is not limited to the embodiments disclosed below, and includes all modifications, equivalents, and alternatives within the technical spirit and scope of the present invention, as well as the substitution or addition of the configuration of any embodiment with the configuration of another embodiment.

[0051] The accompanying drawings are provided to facilitate understanding of the embodiments disclosed in this specification, and it should be understood that the accompanying drawings do not limit the technical ideas disclosed in this specification, but include any modifications, equivalents, or alternatives that fall within the idea and technical scope of the present invention. The components in the drawings may be exaggerated in size or thickness for ease of understanding, but this should not be interpreted as limiting the scope of protection of the present invention.

[0052] The terms used in this specification are merely used to describe particular embodiments or embodiments and are not intended to limit the present invention. Furthermore, singular terms include plural terms unless the context clearly dictates otherwise. The terms "comprises," "constitutes," and the like in the specification are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. In other words, the terms "comprises," "constitutes," and the like in the specification do not preclude the presence or possibility of adding one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0053] Although terms including ordinal numbers such as first, second, etc. may be used to describe various components, the components are not limited by the terms and are used only to distinguish one component from another.

[0054] When a component is referred to as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that there may be other components between them. On the other hand, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components between them.

[0055] When a component is referred to as being "on top of" or "on bottom of" another component, it should be understood that the component may be directly on top of the other component, as well as having other components therebetween.

[0056] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms commonly used and similar to dictionary definitions are to be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and are not to be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0057] An electrode notch device according to an embodiment of the present invention will be described below.

[0058] FIG. 1 is a diagram schematically showing an electrode notching device according to the present invention, FIG. 2 is a plan view schematically showing an electrode notching device according to the present invention, FIG. 3 is a side view schematically showing an electrode notching device according to the present invention, and FIG. 4 is a front view schematically showing an electrode notching device according to the present invention.

[0059] 1 to 4, an electrode notching device 100 according to an embodiment of the present invention includes a notching unit 120, a rewinder roller 130, a splicing table 140, a camera unit 150, a guide pointer unit 160, and a position alignment unit 170.

[0060] The electrode sheet 10 is wound around the unwinder roller 110. The electrode sheet 10 includes a coated portion 11 and an uncoated portion 12. The coated portion 11 is an area of ​​the electrode sheet 10 to which an active material is applied, and the uncoated portion 12 is an area of ​​the electrode sheet 10 to which no active material is applied. The uncoated portion 12 has a predetermined width along the length of the electrode sheet 10 on one or both sides in the width direction of the electrode sheet 10.

[0061] The electrode sheet 10 unwound from the unwinder roller 110 is fed to the cutout portion 120. The cutout portion 120 cuts the plain portion 12 of the electrode sheet 10 to form a plurality of electrode tabs 13. The plurality of electrode tabs 13 may be formed at equal intervals along the length of the plain portion 12. The cutout portion 120 may be formed by cutting the plain portion 12 with a punch or a laser to form a plurality of electrode tabs 13. The cutout portion 120 may have various shapes.

[0062] The connecting sheet 20 is wound around the rewinder roller 130. If the electrode sheet 10 is transported in a meandering or damaged state, the operator stops the electrode notching device 100 and cuts the electrode sheet 10 in the width direction. After cutting a certain section of the electrode sheet 10 or straightening the meandering, the electrode sheet 10 between the notch portion 120 and the rewinder roller 130 is further connected with tape.

[0063] Furthermore, when replacing the bobbin with a new one after the rewinding of the electrode sheet 10 on the rewinder roller 130 is complete, the connecting film 23 wound around the bobbin and the electrode sheet 10 can be connected with tape. The connecting film 23 can be made of a synthetic resin such as a PET (polyethylene terephthalate) film that has high thermal stability and mechanical strength. The tape may be attached to the electrode sheet 10 and the connecting film 23 manually or automatically.

[0064] As described above, the electrode sheet 10 or the connecting film 23 (PET) is wound around the rewinder roller 130 depending on the process conditions, and the electrode sheet 10 and the connecting film 23 wound around the rewinder roller 130 will be referred to as the connecting sheet 20.

[0065] The splicing table 140 is disposed between the notch portion 120 and the rewinder roller 130, and seats the electrode sheet 10 and the connecting sheet 20 during the step of connecting the electrode sheet 10 and the connecting sheet 20 (S11). The splicing table 140 is configured to cut the electrode sheet 10 after the rewinder roller 130 has completed winding the electrode roll. In addition, the electrode sheet 10 and the connecting sheet 20 are seated on the splicing table 140 when they are connected with tape. The light irradiator 180 irradiates light onto the splicing table 140 (S12).

[0066] The camera unit 150 photographs the positions of the electrode sheet 10 and the connecting sheet 20 seated on the splicing table 140 (S13). The camera unit 150 irradiates light onto the electrode sheet 10 and the connecting sheet 20, senses the reflected light, and reads the positions of the electrode sheet 10 and the connecting sheet 20. A vision camera can be used as the camera unit 150.

[0067] Figure 5 is a plan view schematically showing the state in which the splicing table and rewinder roller in the electrode cut-out device according to the present invention align the electrode sheet and connecting sheet, Figure 6 is a plan view showing the positioning of the electrode sheet and connecting electrode in the electrode cut-out device according to the present invention, Figure 7 is a plan view schematically showing the positional difference between the electrode sheet and connecting electrode in the electrode cut-out device according to the present invention, and Figure 9 is a flowchart schematically showing the electrode manufacturing method according to the present invention.

[0068] 5 to 7 and 9, the guide pointer unit 160 displays the first reference position (R1) of the electrode sheet 10 and the second reference position (R2) of the connecting sheet 20 (S14). The guide pointer unit 160 displays the first reference position (R1) and the second reference position (R2) by irradiating light onto both sides of the connecting sheet 20 of the electrode sheet 10 in the width direction. The first reference position (R1) is spaced apart from both sides of the electrode sheet 10 in the width direction by a distance equal to the width of the electrode sheet 10. The second reference position (R2) is spaced apart from both sides of the connecting sheet 20 in the width direction by a distance equal to the width of the connecting sheet 20. The guide pointer unit 160 displays the first reference position (R1) of the electrode sheet 10 and the second reference position (R2) of the connecting sheet 20, allowing the connecting positions of the electrode sheets to be accurately and visually confirmed.

[0069] The position alignment unit 170 aligns the positions of the splicing table 140 and the rewinder roller 130 so that the electrode sheet 10 coincides with the first reference position (R1) and the connecting sheet 20 coincides with the second reference position (R2) (S15). That is, the control unit (PLC, programmable logic controller) corrects the position difference between the electrode sheet 10 and the connecting sheet 20 read by the camera unit 150, and the position alignment unit 170 can align the positions of the splicing table 140 and the rewinder roller 130 by the corrected positions.

[0070] As described above, the camera unit 150 reads the positions of the electrode sheet 10 and the connecting sheet 20, and the control unit controls the position alignment unit 170 to correct the connection position of the electrode sheet 10 and the connecting sheet 20. The position alignment unit 170 then aligns the positions of the splicing table 140 and the rewinder roller 130 to correspond to the corrected positions received from the control unit. When the splicing table 140 and the rewinder roller 130 are aligned, the electrode sheet 10 and the connecting sheet 20 accurately coincide with the first reference position (R1) and the second reference position (R2). As a result, the worker can visually check the first reference position (R1) and the second reference position (R2) and accurately confirm the connection position of the electrode sheet 10 and the connecting sheet 20. This can significantly reduce the time required for the worker to perform the connecting operation. Furthermore, the uniformity of the connecting operation can be ensured, regardless of the worker's level of skill.

[0071] 1 to 4 and 9, the splicing table 140 includes a fixed table 141 and an alignment table 143. As shown in FIG.

[0072] The electrode sheet 10 is placed on the upper side of the fixed table 141. The fixed table 141 includes a lower fixed table 141a and an upper fixed table 141b placed on the lower fixed table 141a.

[0073] The alignment table 143 is disposed between the fixed table 141 and the rewinder roller 130 and is movable in the width direction of the electrode sheet 10 by a position alignment unit 170 so that the electrode sheet 10 is aligned at the connecting position. The alignment table 143 includes a lower alignment table 143a and an upper alignment table 143b seated above the lower alignment table 143a. The upper alignment table 143b is moved in the width direction of the electrode sheet 10 by the position alignment unit 170 together with the lower alignment table 143a.

[0074] A first fixing bar 145 is installed above the fixing table 141 to fix the electrode sheet 10. A second fixing bar 146 is installed above the alignment table 143 to fix the electrode sheet 10. When cutting or connecting the electrode sheet 10, the first fixing bar 145 and the second fixing bar 146 descend to fix the electrode sheet 10 in place. The first fixing bar 145 and the second fixing bar 146 are arranged in line with the width direction of the electrode sheet 10.

[0075] The position alignment section 170 includes a table alignment section 171 and a rewinder alignment section 173 .

[0076] The table alignment unit 171 aligns the position of the splicing table 140 so that the electrode sheet 10 coincides with the first reference position (R1). The table alignment unit 171 moves the splicing table 140 in the width direction of the electrode sheet 10. A stepping motor, a linear motor, a hydraulic cylinder, or the like that can accurately control the position can be used for the table alignment unit 171.

[0077] The rewinder alignment unit 173 aligns the position of the rewinder roller 130 so that the connecting sheet 20 coincides with the second reference position (R2). The rewinder alignment unit 173 moves the rewinder roller 130 in the width direction of the electrode sheet 10. A stepping motor, a linear motor, a hydraulic cylinder, or the like that can accurately control the position can be used for the rewinder alignment unit 173.

[0078] When either the electrode sheet 10 or the connecting sheet 20 deviates from the first reference position (R1) or the second reference position (R2), only one of the table alignment unit 171 and the rewinder alignment unit 173 can be driven. Also, when both the electrode sheet 10 and the connecting sheet 20 deviate from the first reference position (R1) and the second reference position (R2), the rewinder alignment unit 173 can be driven together with the table alignment unit 171.

[0079] The splicing table 140 can be made of a light-transmitting material. Various light-transmitting materials can be used, such as transparent acrylic resin, urethane resin, and quartz material. This allows the camera unit 150 to accurately read the positions of the electrode sheet 10 and the connecting sheet 20 even if it is placed above or below the splicing table 140. Furthermore, even if the guide pointer unit 160 is placed inside or outside the splicing table 140, it can accurately display the first reference position (R1) and the second reference position (R2) of the electrode sheet 10 and the connecting sheet 20 on the splicing table 140, the rewinder roller 130, etc.

[0080] The electrode notching device 100 may further include a light irradiation unit 180 that irradiates light onto the splicing table 140. With this, the camera unit 150 reads the positions of the electrode sheet 10 and the connecting sheet 20 while the light irradiation unit 180 is irradiating light onto the splicing table 140, which may result in more accurate position reading by the camera unit 150.

[0081] The light irradiation unit 180 may be disposed below the splicing table 140. This allows the light irradiation unit 180 to be installed so as to avoid the transport path of the connecting sheet 20. This also improves the degree of freedom in installing the electrode notching device 100.

[0082] The guide pointer section 160 may include a first guide pointer 161 and a second guide pointer 162 .

[0083] The first guide pointer 161 displays the first reference position (R1) on the splicing table 140. The first guide pointer 161 displays the first reference position (R1) by irradiating it with a laser at intervals equal to the width of the electrode sheet 10. Because the first guide pointer 161 irradiates a laser with linearity, it is possible to prevent the laser from diffracting or diffusing when passing through the air or the splicing table 140 made of a translucent material. This allows the first reference position (R1) to be displayed accurately.

[0084] The second guide pointer 162 displays the second reference position (R2) on the splicing table 140. The second guide pointer 162 displays the second reference position (R2) by irradiating it with a laser at intervals equal to the width of the connecting sheet 20. The second guide pointer 162 irradiates a laser with linearity, which prevents the laser from diffracting or diffusing when passing through the air or the splicing table 140 made of a translucent material. This allows the second reference position (R2) to be displayed accurately.

[0085] The first guide pointer 161 and the second guide pointer 162 illuminate the electrode sheet 10 with light in a fan shape on both sides in the width direction to display the first reference position (R1) and the second reference position (R2). Because the first reference position (R1) and the second reference position (R2) are displayed in a fan shape, twists, meanders, etc. of the electrode sheet 10 and the connecting sheet 20 can be accurately confirmed.

[0086] At least one of the first guide pointer 161 and the second guide pointer 162 may be disposed below the splicing table 140. This allows the first guide pointer 161 or the second guide pointer 162 to be installed so as to avoid the transport path of the electrode sheet 10.

[0087] The camera unit 150 may be a sector-shaped camera unit 150 arranged alongside the electrode sheet 10 and the connecting sheet 20 in the width direction. The length of the sector-shaped camera unit 150 may be formed slightly shorter than the width of the electrode sheet 10 and the connecting sheet 20.

[0088] The camera unit 150 may be disposed below the splicing table 140. In this case, the light irradiation unit 180 may be disposed between the splicing table 140 and the camera unit 150.

[0089] The electrode notching device 100 may further include a foreign matter removal unit 190 installed on the splicing table 140 to remove foreign matter generated when cutting the electrode sheet 10 and the connecting sheet 20. This can prevent foreign matter generated when cutting the electrode sheet 10 and the connecting sheet 20 from adhering to the electrode sheet 10 and the connecting sheet 20. This can prevent an increase in the defect rate due to foreign matter in subsequent processes.

[0090] The foreign matter removal unit 190 includes an air suction unit 191 and an air blower 193 .

[0091] The air suction unit 191 is disposed on the splicing table 140. The air suction unit 191 is disposed in the middle of the splicing table 140 between the fixed table 141 on which the electrode sheet 10 is cut and the alignment table 143.

[0092] The air blower 193 is connected to the air suction unit 191 to provide a suction force to the air suction unit 191. The air blower 193 is connected to the air suction unit 191 via a suction hose. The suction hose is installed so as to avoid the light irradiation area of ​​the light irradiation unit 180 and the reading area of ​​the camera unit 150.

[0093] Figure 5 is a plan view schematically showing the state in which the splicing table and rewinder roller in the electrode cutout device according to the present invention align the electrode sheet and connecting sheet, Figure 6 is a plan view showing the positioning of the electrode sheet and connecting electrode in the electrode cutout device according to the present invention, and Figure 7 is a plan view schematically showing the positional difference between the electrode sheet and connecting electrode in the electrode cutout device according to the present invention.

[0094] 5 to 7, when the camera unit 150 irradiates the electrode sheet 10 and the connecting electrode 21 with light, the positions of the electrode sheet 10 and the connecting electrode 21 are read. At this time, the following are read: the distance (first distance: G1) between one widthwise (upper) end of the ground portion 11 of the electrode sheet 10 and one widthwise end of the connecting electrode 21; the distance (second distance: G2) between the end of the electrode tab 13 of the electrode sheet 10 and the electrode tab 13 of the connecting electrode 21; the distance (third distance: G3) between the end of the electrode tab 13 of the electrode sheet 10 and the other lengthwise end of the rewinder roller 130; and the distance (fourth distance: G4) between one widthwise end of the ground portion 11 of the electrode sheet 10 and one widthwise end of the rewinder roller 130.

[0095] When the connecting sheet 20 is a connecting electrode 21, the first guide pointer 161 displays a first reference position (R1) so that the electrode sheet 10 and the connecting electrode 21 are aligned. At this time, the second guide pointer 162 displays a second reference position (R2) so that the connecting electrode 21 is wound at the center of the length of the rewinder roller 130. In addition, the first guide pointer 161 can display the first reference position (R1) on the splicing table 140, and the second guide pointer 162 can display the second reference position (R2) on the splicing table 140 or the rewinder roller 130.

[0096] The control unit drives the table alignment unit 171 to correct the first distance (G1) and the second distance (G2) to the same value, and drives the rewinder alignment unit 173 to correct the third distance (G3) and the fourth distance (G4) to the same value. At this time, the correction of the difference between the first distance (G1) and the second distance (G2) is a correction to align the electrode sheet 10 and the connecting sheet 20 with the first reference position (R1). Furthermore, the correction of the difference between the third distance (G3) and the fourth distance (G4) is a correction to align the electrode sheet 10 and the connecting sheet 20 with the second reference position (R2). The correction of the difference between the third distance (G3) and the fourth distance (G4) is a correction to position the electrode sheet 10 and the connecting sheet 20 at the center of the rewinder roller 130 in the longitudinal direction.

[0097] FIG. 8 is a plan view showing the positioning of the electrode sheet and the connecting film in the electrode notch device according to the present invention.

[0098] 8, when the camera unit 150 shines light onto the electrode sheet 10 and the connecting film 23, the positions of the electrode sheet 10 and the connecting film 23 are read. At this time, the following are read: the distance between one widthwise (upper) end of the ground portion 11 of the electrode sheet 10 and one widthwise end of the connecting film 23 (first distance: G1), the distance between the end of the electrode tab 13 of the electrode sheet 10 and the other widthwise end of the connecting film 23 (second distance: G2), the distance between the end of the electrode tab 13 of the electrode sheet 10 and the other lengthwise end of the rewinder roller 130 (third distance: G3), and the distance between one widthwise end of the ground portion 11 of the electrode sheet 10 and one widthwise end of the rewinder roller 130 (fourth distance: G4).

[0099] When the connecting sheet 20 is a connecting film 23, the first guide pointer 161 displays a first reference position (R1) so that the electrode sheet 10 is positioned at the center in the width direction of the connecting film 23. At this time, the second guide pointer 162 displays a second reference position (R2) so that the connecting film 23 is wound at the center in the length direction of the rewinder roller 130. In addition, the first guide pointer 161 can display the first reference position (R1) on the splicing table 140, and the second guide pointer 162 can display the second reference position (R2) on the splicing table 140 or the rewinder roller 130.

[0100] The control unit drives the table alignment unit 171 to correct the first distance (G1) and the second distance (G2) to the same value. The control unit also drives the rewinder alignment unit 173 to correct the third distance (G3) and the fourth distance (G4) to the same value. The correction of the difference between the first distance (G1) and the second distance (G2) is a correction for aligning the electrode sheet 10 and the connecting film 23 with the first reference position (R1). The correction of the difference between the third distance (G3) and the fourth distance (G4) is a correction for aligning the electrode sheet 10 and the connecting film 23 with the second reference position (R2). The correction of the difference between the third distance (G3) and the fourth distance (G4) is a correction for positioning the electrode sheet 10 and the connecting film 23 at the center of the rewinder roller 130 in the longitudinal direction.

[0101] Although the present invention has been described above with reference to illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described and explained while describing the embodiments of the present invention, it is natural that the effects that can be predicted by the configuration should also be recognized. [Explanation of symbols]

[0102] 10 Electrode sheet 11 Landed part 12 Plain area 13 Electrode tab 20 Connecting Sheets 21 Connecting electrode 23 Connecting Film 100 Electrode notch device 110 Unwinder Roller 120 Notch 130 Rewinder Roller 140 Splicing Table 141 Fixed Table 141a Lower fixed table 141b Upper fixed table 143 Alignment Table 143a Lower Alignment Table 143b Upper Alignment Table 145 First fixed bar 146 Second fixed bar 147 Fixed bar drive unit 150 Camera Department 160 Guide pointer part 161 First Guide Pointer 162 Second Guide Pointer 170 Position Alignment Section 171 Table Alignment Section 173 Rewinder Alignment Section 180 Light irradiation unit 190 Foreign matter removal section 191 Air intake section 193 Air Blower R1 1st reference position R2 2nd reference position

Claims

1. a cutout portion for forming an electrode tab in a plain portion of the electrode sheet; a rewinder roller on which the connected sheet is wound; a splicing table disposed between the notch and the rewinder roller, on which the electrode sheet and the connecting sheet are seated; a camera unit that photographs the positions of the electrode sheet and the connecting sheet seated on the splicing table; a guide pointer unit that displays a first reference position of the electrode sheet and a second reference position of the connecting sheet; an alignment unit that aligns the positions of the splicing table and the rewinder roller so that the electrode sheet coincides with a first reference position and the connecting sheet coincides with a second reference position.

2. The splicing table includes: a fixed table on which the electrode sheet is seated; 2. The electrode notching device according to claim 1, further comprising: an alignment table disposed between the fixed table and the rewinder roller, the alignment table being movable in the width direction of the electrode sheet by the position alignment unit so as to align the electrode sheet at a first reference position.

3. a first fixing bar is installed on the upper side of the fixing table to fix the electrode sheet; The electrode notching device according to claim 2 , wherein a second fixing bar is installed above the alignment table to fix the electrode sheet.

4. The position alignment unit a table alignment unit that aligns the position of the splicing table so that the electrode sheet coincides with the first reference position; The electrode notch device according to claim 1 , further comprising: a rewinder alignment unit that aligns the position of the rewinder roller so that the connecting sheet coincides with the second reference position.

5. The electrode notching device according to claim 1 , wherein the splicing table is made of a light-transmitting material.

6. The electrode notching device according to claim 5 , further comprising a light irradiation unit that irradiates the splicing table with light.

7. The electrode notching device according to claim 6 , wherein the light irradiation unit is disposed below the splicing table.

8. The guide pointer unit is a first guide pointer that displays the first reference position on the splicing table; The electrode notching device according to claim 1 , further comprising: a second guide pointer that indicates the second reference position on the splicing table or the rewinder roller.

9. The electrode notching device according to claim 8 , wherein the first guide pointer and the second guide pointer irradiate light in a fan shape on both sides of the width direction of the electrode sheet to indicate the first reference position and the second reference position.

10. The electrode notching device according to claim 8 , wherein at least one of the first guide pointer and the second guide pointer is disposed below the splicing table.

11. When the connecting sheet is a connecting electrode, the first guide pointer indicates the first reference position so that the electrode sheet and the connecting electrode are aligned; The electrode notching device according to claim 8 , wherein the second guide pointer indicates the second reference position so that the connecting electrode is wound at the center of the rewinder roller in the longitudinal direction.

12. When the connecting sheet is a connecting film, the first guide pointer indicates the first reference position so that the electrode sheet is positioned at the center of the connecting film in the width direction; The electrode notch device according to claim 8 , wherein the second guide pointer indicates the second reference position so that the connected film is wound at the center of the rewinder roller in the length direction.

13. The electrode notch device according to claim 1 , wherein the camera unit is a sector-shaped camera unit arranged side by side in the width direction of the electrode sheet and the connecting sheet.

14. The electrode notching device according to claim 1 , wherein the camera unit is disposed below the splicing table.

15. The electrode notching device according to claim 1 , further comprising a foreign matter removal unit installed on the splicing table to remove foreign matter generated when the electrode sheet and the connecting sheet are cut.

16. The foreign matter removal unit an air suction unit disposed on the splicing table; The electrode notch device of claim 15, further comprising: an air blower coupled to the air intake to provide a suction force to the air intake.

17. a seating step of seating the electrode sheet and the connecting sheet on a splicing table; a photographing step in which a camera unit photographs the positions of the electrode sheet and the connecting sheet seated on the splicing table; a display step in which a guide pointer unit displays a first reference position of the electrode sheet and a second reference position of the connecting sheet; an aligning step of aligning positions of the splicing table and the rewinder roller so that a position aligning unit aligns the electrode sheet with a first reference position and aligns the connecting sheet with a second reference position.

18. 18. The method of claim 17, wherein, in the displaying, the guide pointer unit irradiates light to both widthwise sides of the electrode sheet and the connecting sheet to display the first reference position and the second reference position.

19. In the display step, The first reference positions are spaced apart by a distance equal to the width of the electrode sheet, The method of claim 18 , wherein the second reference positions are spaced apart by a distance equal to the width of the connecting sheet.

20. In the display step, a first guide pointer of the guide pointer unit displays a first reference position on the splicing table; 18. The method of claim 17, wherein a second guide pointer of the guide pointer portion indicates a second reference position on the rewinder roller.

21. The electrode manufacturing method of claim 20 , wherein the first guide pointer and the second guide pointer irradiate light in a fan shape on both sides of the width direction of the electrode sheet to indicate the first reference position and the second reference position.

22. When the connecting sheet is a connecting electrode, the first guide pointer indicates the first reference position so that the electrode sheet and the connecting electrode are aligned; The electrode manufacturing method according to claim 20 , wherein the second guide pointer indicates the second reference position so that the connecting electrode is wound at the center of the rewinder roller in the longitudinal direction.

23. 23. The electrode manufacturing method of claim 22, wherein, in the photographing step, the control unit reads a first distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the connecting electrode, a second distance between an end of an electrode tab of the electrode sheet and an electrode tab of the connecting electrode, a third distance between an end of an electrode tab of the electrode sheet and the other lengthwise end of the rewinder roller, and a fourth distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the rewinder roller.

24. When the connecting sheet is a connecting film, the first guide pointer indicates the first reference position so that the electrode sheet is positioned at the center of the connecting film in the width direction; The electrode manufacturing method according to claim 20 , wherein the second guide pointer indicates the second reference position so that the connecting film is wound at the center of the rewinder roller in the length direction.

25. 25. The electrode manufacturing method of claim 24, wherein, in the photographing, the control unit reads a first distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the connecting film, a second distance between an end of an electrode tab of the electrode sheet and the other widthwise end of the connecting film, a third distance between an end of an electrode tab of the electrode sheet and the other lengthwise end of the rewinder roller, and a fourth distance between one widthwise end of the ground portion of the electrode sheet and one widthwise end of the rewinder roller.

26. In the alignment step, a table alignment unit of the position alignment unit aligning the position of the splicing table so that the electrode sheet coincides with the first reference position; The electrode manufacturing method according to claim 17 , wherein a rewinder alignment unit of the position alignment unit aligns the position of the rewinder roller so that the connection sheet coincides with the second reference position.

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