Electrode notching device and electrode manufacturing method

Abstract

The invention discloses an electrode notching device and an electrode manufacturing method. The electrode notching device according to the present invention comprises: a notching unit for forming an electrode tab on an uncoated portion of an electrode tab; the rewinding roller is used for winding the connecting sheet; an electrode plate and a connecting plate are placed on the splicing table, and the splicing table is arranged between the cutting unit and the rewinding roller; the camera unit is used for shooting the positions of the electrode plates and the connecting plates placed on the splicing table; a guide pointer unit indicating a first reference position of the electrode sheet and a second reference position of the connection sheet; and a position alignment unit that aligns positions of the splice table and the rewinding roller such that the electrode sheet is aligned with the first reference position and the connection sheet is aligned with the second reference position.

Description

Technical Field

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2022-0126917, filed on October 5, 2022, and the entire contents disclosed in the file of this patent application are incorporated as a part of this specification.

[0002] The present invention relates to an electrode cutting device and an electrode manufacturing method for accurately connecting electrode sheets when replacing electrode sheets, preventing the loss of electrode sheets and shortening the connection time of electrode sheets. Background Art

[0003] Generally, a secondary battery includes a negative electrode, a positive electrode and an electrolyte, and uses a chemical reaction to generate electrical energy. Due to the advantage that a secondary battery can be charged and discharged, the use of secondary batteries has gradually increased. Among such secondary batteries, lithium secondary batteries are widely used as power sources for electronic communication equipment or driving sources for high-output hybrid vehicles and electric vehicles because lithium secondary batteries have a higher energy density per unit weight.

[0004] In terms of the shape of such secondary batteries, there is an increasing demand for prismatic secondary batteries and pouch-shaped secondary batteries that can be applied to products such as mobile phones due to their thinner thickness. In terms of the materials of the secondary batteries, there is an increasing demand for lithium secondary batteries such as lithium ion batteries and lithium ion polymer batteries that have higher energy density, discharge voltage, and output stability.

[0005] The electrode sheet is unwound from the unwinder and supplied to a slitting module, which forms electrode tabs at equal intervals on the uncoated portion of the electrode. The electrode formed with the electrode tabs is wound on a rewinder.

[0006] Whenever a new electrode sheet is replaced in the unwinder, the existing electrode is cut and the new electrode is connected. In addition, a new reel is replaced in the rewinder. Here, in the rewinder, the existing electrode is cut and connected to the connecting film (PET) or electrode.

[0007] However, conventionally, since the operator manually connects the electrode on the rewinder, there may be deviations in the alignment and engagement interval of the connection position of the electrode depending on the operator's technical level. In addition, when there are deviations in the alignment and engagement interval of the connection position of the electrode, the tension of the electrode becomes uneven in the width direction of the electrode, which may cause the electrode to meander. In addition, due to the electrode meandering, the winding position of the electrode in the rewinder becomes deviated, which may cause various defects. In addition, when an electrode defect occurs, an additional process of discarding the relevant electrode and reconnecting a new electrode must be performed, which increases the average process time.

[0008] In addition, a process is performed in which the operator measures the distance from the electrode so that the connection position and the winding position of the electrode match. In addition, when connecting the connection film to the electrode, since the width of the connection film is larger than the width of the electrode, the electrode must be placed in the center of the connection film. In this process, the average process time and work loss increase depending on the skill level of the operator.

[0009] The background technology of the present invention is disclosed in Korean Patent Application Publication No. 2020-0109041 (published on September 22, 2020, invention title: Cutting method and device for electrode substrate). Summary of the invention

[0010] Technical issues

[0011] In order to solve the above-mentioned problems, an object of the present invention is to provide an electrode cutting device and an electrode manufacturing method that can visually and accurately confirm the connection position of the electrode sheet.

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

[0013] Still another object of the present invention is to provide an electrode cutting device and an electrode manufacturing method which can significantly shorten the operator's working time for making connections.

[0014] It is another object of the present invention to provide an electrode cutting device and an electrode manufacturing method that can ensure the consistency of the work of connecting the electrode sheet to the connecting sheet regardless of the operator's technical level.

[0015] The technical problem to be solved by the present invention is not limited to the above-mentioned purpose, and other purposes and advantages of the present invention that are not described can be understood through the subsequent description and will be more clearly understood through the embodiments of the present invention. In addition, it is obvious that the purposes and advantages of the present invention can be achieved by the means and combinations thereof indicated in the claims.

[0016] Technical Solution

[0017] In order to solve the above problems, the electrode cutting device of the present invention includes: a cutting unit for forming an electrode joint sheet on an uncoated portion of an electrode sheet; a rewinding roller for winding a connecting sheet; a splicing table on which the electrode sheet and the connecting sheet are placed, the splicing table being arranged between the cutting unit and the rewinding roller; a camera unit for photographing the positions of the electrode sheet and the connecting sheet placed 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, the position alignment unit aligning the positions of the splicing table and the rewinding roller so that the electrode sheet is aligned with the first reference position and the connecting sheet is aligned with the second reference position.

[0018] The splicing table may include: a fixing table on which the electrode sheet is placed; and an alignment table, which is arranged between the fixing table and the rewinding roller and is installed to be movable in the width direction of the electrode sheet by the position alignment unit so that the electrode sheet is aligned with the first reference position.

[0019] A first fixing rod may be installed above the fixing stage to fix the electrode sheet, and a second fixing rod may be installed above the alignment stage to fix the electrode sheet.

[0020] The position alignment unit may further include: a table alignment unit, which aligns the position of the splicing table so that the electrode sheet is aligned with the first reference position; and a rewinder alignment unit, which aligns the position of the rewinding roller so that the connecting sheet is aligned with the second reference position.

[0021] The splicing platform may be made of light-transmitting material.

[0022] The electrode cutting device may further include: a light irradiation unit irradiating light to the splicing stage.

[0023] The light irradiation unit may be disposed below the splicing table.

[0024] The guide pointer unit may include: a first guide pointer indicating the first reference position on the splicing table; and a second guide pointer indicating the second reference position on the splicing table or the rewinding roller.

[0025] The first guide pointer and the second guide pointer may indicate the first reference position and the second reference position by linearly irradiating light to both ends in a width direction of the electrode sheet.

[0026] At least one of the first guide pointer and the second guide pointer may be disposed below the splicing table.

[0027] 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 in the length direction of the rewinding roller.

[0028] When the connecting sheet is a connecting film, the first guide pointer may indicate the first reference position so that the electrode sheet is located at the center of the width direction of the connecting film, and the second guide pointer may indicate the second reference position so that the connecting film is wound at the center of the length direction of the rewinding roller.

[0029] The camera unit may include a line scan camera disposed in parallel with width directions of the electrode sheet and the connection sheet.

[0030] The camera unit may be disposed below the stitching table.

[0031] The electrode cutting device may further include: a foreign matter removing portion installed on the splicing table to remove foreign matter generated when cutting the electrode sheet and the connecting sheet.

[0032] The foreign matter removing part may include: an air inlet provided on the splicing table; and a blower connected to the air inlet to provide suction force to the air inlet.

[0033] The electrode manufacturing method of the present invention includes: a placing step of placing 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 placed on the splicing table by a camera unit; an indicating step of indicating a first reference position of the electrode sheet and a second reference position of the connecting sheet by a guide pointer unit; and an aligning step of aligning the positions of the splicing table and the rewinding roller by a position alignment unit so that the electrode sheet can be aligned with the first reference position and the connecting sheet can be aligned with the second reference position.

[0034] In the indicating step, the guide pointer unit may indicate the first reference position and the second reference position by irradiating light to both ends of the electrode sheet and the connection sheet in a width direction.

[0035] In the indicating step, the first reference position may be spaced apart by a distance equal to a width of the electrode sheet, and the second reference position may be spaced apart by a distance equal to a width of the connection sheet.

[0036] In the indicating step, a first guide pointer of the guide pointer unit may indicate the first reference position on the splicing table, and a second guide pointer of the guide pointer unit may indicate the second reference position on the rewinding roller.

[0037] The first guide pointer and the second guide pointer may indicate the first reference position and the second reference position by linearly irradiating light to both ends in a width direction of the electrode sheet.

[0038] 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 in the length direction of the rewinding roller.

[0039] In the shooting step, the controller can determine: a first distance between one end of the coated portion of the electrode sheet in the width direction and one end of the connecting electrode in the width direction; a second distance between the end of the electrode contact of the electrode sheet and the electrode contact of the connecting electrode; a third distance between the end of the electrode contact of the electrode sheet and the other end in the length direction of the rewinding roller; and a fourth distance between the one end of the coated portion of the electrode sheet in the width direction and one end of the rewinding roller.

[0040] When the connecting sheet is a connecting film, the first guide pointer may indicate the first reference position so that the electrode sheet is located at the center of the width direction of the connecting film, and the second guide pointer may indicate the second reference position so that the connecting film is wound at the center of the length direction of the rewinding roller.

[0041] In the photographing step, the controller may determine: a first distance between one end of the coated portion of the electrode sheet in the width direction and one end of the connecting film in the width direction; a second distance between an end of an electrode tab of the electrode sheet and the other end of the connecting film; a third distance between the end of the electrode tab of the electrode sheet and the other end in the length direction of the rewinding roller; and a fourth distance between the one end of the coated portion of the electrode sheet in the width direction and one end of the rewinding roller.

[0042] In the alignment step, the position of the splicing table can be aligned by the table alignment unit of the position alignment unit so that the electrode sheet is aligned with the first reference position, and the position of the rewinding roller can be aligned by the rewinder alignment unit of the position alignment unit so that the connecting sheet is aligned with the second reference position.

[0043] Beneficial Effects

[0044] According to the present invention, since the guide pointer unit indicates the first reference position of the electrode sheet and the second reference position of the connection sheet, the connection position of the electrode sheet can be visually confirmed accurately.

[0045] According to the present invention, the camera unit reads the positions of the electrode sheet and the connecting sheet, and the controller drives the position alignment unit to correct the connecting position of the electrode sheet and the connecting sheet. Therefore, the electrode sheet and the connecting sheet can be accurately positioned at the connecting position.

[0046] According to the present invention, when the splicing table and the rewinding roller are aligned, the electrode sheet and the connecting sheet can be accurately aligned with the first reference position and the second reference position.

[0047] According to the present invention, since the electrode sheet and the connection sheet are accurately aligned with the first reference position and the second reference position, the work time of the operator for connection can be significantly shortened.

[0048] According to the present invention, the consistency of the work of connecting the electrode sheet to the connecting sheet can be ensured regardless of the skill level of the operator.

[0049] In addition to the above-mentioned beneficial effects, specific effects of the present invention will be further described while describing specific details of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a diagram schematically illustrating an electrode cutting device according to the present invention.

[0051] Figure 2 is a plan view schematically illustrating an electrode cutting device according to the present invention.

[0052] Figure 3 is a side view schematically illustrating an electrode cutting device according to the present invention.

[0053] Figure 4 is a front view schematically illustrating an electrode cutting device according to the present invention.

[0054] Figure 5 is a plan view schematically illustrating a state in which a splicing table and a rewinding roller align an electrode sheet and a connecting sheet in an electrode slitting device according to the present invention.

[0055] Figure 6 is a plan view defining the positions of electrode sheets and connecting electrodes in the electrode cutting device according to the present invention.

[0056] Figure 7 is a plan view schematically illustrating a positional deviation between an electrode sheet and a connecting electrode in the electrode cutting device according to the present invention.

[0057] Figure 8 It is a plan view for determining the positions of an electrode sheet and a connecting film in an electrode cutting device according to the present invention.

[0058] Fig. 9 is a flow chart schematically illustrating a method for manufacturing an electrode according to the present invention.

[0059] 10: Electrode sheet

[0060] 11: Coating part

[0061] 12: Uncoated part

[0062] 13: Electrode contact

[0063] 20: Connecting piece

[0064] 21: Connecting electrodes

[0065] 23: Connecting film (PET)

[0066] 100: Electrode cutting device

[0067] 110: Unwinding roller

[0068] 120: Cutout unit

[0069] 130: Rewinding roller

[0070] 140: Splicing table

[0071] 141: Fixed station

[0072] 141a: Lower fixed platform

[0073] 141b: Upper fixed platform

[0074] 143: Aiming at the stage

[0075] 143a: Lower alignment table

[0076] 143b: Upper alignment stage

[0077] 145: First fixed rod

[0078] 146: Second fixed rod

[0079] 147: Fixed rod drive unit

[0080] 150: Camera unit

[0081] 160: Guide pointer unit

[0082] 161: First guide pointer

[0083] 162: Second guide pointer

[0084] 170: Position alignment unit

[0085] 171: Stage alignment unit

[0086] 173: Rewinder alignment unit

[0087] 180: Light irradiation unit

[0088] 190: Foreign matter removal department

[0089] 191: Air Inlet

[0090] 193: Blower

[0091] R1: First reference position

[0092] R2: Second reference position. DETAILED DESCRIPTION

[0093] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0094] The present invention is not limited to the embodiments disclosed below, and various changes can be applied and can be implemented in various different forms. The embodiments of the text are only provided to improve the disclosure of the present invention and fully convey the scope of the present invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments disclosed below, but it should be understood that in addition to the configuration of one embodiment being replaced or added with another embodiment, the present invention also includes all changes and equivalents covered within the technical spirit and scope of the present invention.

[0095] The accompanying drawings are only used to facilitate the understanding of the embodiments disclosed herein. It should be understood that the technical ideas disclosed herein are not limited by the accompanying drawings, which cover all changes, equivalents and substitutions within the spirit and technical scope of the present invention. In the accompanying drawings, although the components may be exaggeratedly larger or smaller in size or thickness for ease of understanding, etc., this should not constitute a limitation on the scope of protection of the present invention.

[0096] The terms used herein are only used to describe specific embodiments or examples and are not intended to limit the present invention. In addition, expressions in the singular include expressions in the plural, unless the context clearly indicates otherwise. In the text, terms such as "including" and "consisting of" are intended to indicate the presence of features, quantities, steps, operations, components, parts, or combinations thereof described in this application. That is, it should be understood that terms such as "including" and "consisting of" used herein should not exclude the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts, or combinations thereof.

[0097] Although terms including ordinal numbers such as "first" and "second" may be used to describe components, the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

[0098] It should be understood that when an element is said to be “connected to” another element, the element may be directly connected to the other element or an intervening element may exist between them. On the other hand, when an element is said to be “directly connected to” another element, it should be understood that there are no intervening elements between them.

[0099] When an element is referred to as being 'on' or "under" another element, it should be understood that intervening elements may be present in addition to being directly on or under the other element.

[0100] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant field, and unless explicitly defined herein, terms such as those defined in commonly used dictionaries should not be interpreted in an ideal or excessive form of meaning.

[0101] Hereinafter, an electrode incision device according to an embodiment of the present invention will be described.

[0102] Figure 1 is a diagram schematically illustrating an electrode cutting device according to the present invention, Figure 2 is a plan view schematically illustrating an electrode cutting device according to the present invention, Figure 3 is a side view schematically illustrating an electrode cutting device according to the present invention, Figure 4 is a front view schematically illustrating an electrode cutting device according to the present invention.

[0103] Reference Figures 1 to 4 , the electrode incision device 100 according to the embodiment of the present invention includes a incision unit 120 , a rewinding roller 130 , a splicing table 140 , a camera unit 150 , a guide pointer unit 160 , and a position alignment unit 170 .

[0104] The electrode sheet 10 is wound on the unwinding roller 110. The electrode sheet 10 includes a coated portion 11 and an uncoated portion 12. The coated portion 11 is a region of the electrode sheet 10 coated with an active material, and the uncoated portion 12 is a region of the electrode sheet 10 not coated with an active material. The uncoated portion 12 has a predetermined width on one side or both sides of the width direction of the electrode sheet 10 and along the length direction of the electrode sheet 10.

[0105] The electrode sheet 10 unwound from the unwinding roll 110 is supplied to the cutting unit 120. The cutting unit 120 cuts the uncoated 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 direction of the uncoated portion 12. The cutting unit 120 may form the plurality of electrode tabs 13 by cutting the uncoated portion 12 using a punch or a laser. The cutting unit 120 may be applied in various forms.

[0106] The connecting sheet 20 is wound on the rewinding roller 130. When the electrode sheet 10 is conveyed in a meandering or damaged state, the operator cuts the electrode sheet 10 in the width direction after stopping the electrode cutting device 100. After cutting off a specific portion of the electrode sheet 10 or correcting the meandering state, the electrode sheet between the cutting unit 120 and the rewinding roller 130 is reconnected with an adhesive tape.

[0107] In addition, when a new reel is replaced after winding the electrode sheet 10 on the rewinding roller 130 is completed, the electrode sheet 10 and the connecting film 23 wound on the reel can be connected with an adhesive tape. The connecting film 23 can be made of a synthetic resin such as a polyester film (PET: polyester) with high thermal stability and strong mechanical strength. The adhesive tape can be attached to the electrode sheet 10 and the connecting film 23 manually or automatically.

[0108] As described above, the electrode sheet 10 or the connection film 23 (PET) is wound on the rewinding roll 130 according to the process conditions. The electrode sheet 10 and the connection film 23 wound on the rewinding roll 130 will be referred to as the connection sheet 20.

[0109] The splicing table 140 is provided between the cutting unit 120 and the rewinding roll 130. In the process of connecting the electrode sheet 10 and the connecting sheet 20, the electrode sheet 10 and the connecting sheet 20 are placed on the splicing table 140 (S11). The splicing table 140 is a component for cutting the electrode sheet 10 after the electrode roll is completely wound on the rewinding roll 130. In addition, when the electrode sheet 10 and the connecting sheet 20 are connected with tape, the electrode sheet 10 and the connecting sheet 20 are placed on the splicing table 140. The light irradiation unit 180 irradiates light onto the splicing table 140 (S12).

[0110] The camera unit 150 photographs the positions of the electrode sheet 10 and the connecting sheet 20 placed on the splicing table 140 (S13). The camera unit 150 irradiates light to the electrode sheet 10 and the connecting sheet 20, and reads the positions of the electrode sheet 10 and the connecting sheet 20 by detecting reflected light. A visual camera can be used as the camera unit 150.

[0111] Figure 5 is a plan view schematically illustrating a state in which a splicing table and a rewinding roller align an electrode sheet and a connecting sheet in an electrode cutting device according to the present invention, Figure 6 is a plan view defining the positions of the electrode sheets and the connecting electrodes in the electrode cutting device according to the present invention, Figure 7 is a plan view schematically illustrating a positional deviation between an electrode sheet and a connecting electrode in an electrode cutting device according to the present invention, Fig. 9 is a flow chart schematically illustrating a method for manufacturing an electrode according to the present invention.

[0112] Reference Figures 5 to 7 and Fig. 9, the guide pointer unit 160 indicates 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 irradiates light to both ends of the connecting sheet 20 and the electrode sheet 10 in the width direction, respectively, to indicate the first reference position R1 and the second reference position R2. The first reference position R1 is at both ends in the width direction of the electrode sheet 10 and is spaced apart by a distance equal to the width of the electrode sheet 10. The second reference position R2 is at both ends in the width direction of the connecting sheet 20 and is spaced apart by a distance equal to the width of the connecting sheet 20. Since the guide pointer unit 160 indicates the first reference position R1 of the electrode sheet 10 and the second reference position R2 of the connecting sheet 20, the connection position of the electrode sheet can be visually accurately confirmed.

[0113] The position alignment unit 170 aligns the positions of the splicing table 140 and the rewinding roller 130 so that the electrode sheet 10 is aligned with the first reference position R1 and the connecting sheet 20 is aligned with the second reference position R2 (S15). That is, the controller PGC corrects the position deviation of the electrode sheet 10 and the connecting sheet 20 read by the camera unit 150, and the position alignment unit 170 aligns the splicing table 140 and the rewinding roller 130 by the amount of the corrected position.

[0114] As described above, the camera unit 150 is controlled to read the positions of the electrode sheet 10 and the connecting sheet 20, and the controller controls the position alignment unit 170 to correct the connection position of the electrode sheet 10 and the connecting sheet 20. That is, the position alignment unit 170 aligns the positions of the splicing table 140 and the rewinding roller 130 to correspond to the correction position received from the controller. When the splicing table 140 and the rewinding roller 130 are aligned, the electrode sheet 10 and the connecting sheet 20 are accurately aligned with the first reference position R1 and the second reference position R2. As a result, the operator can visually check the first reference position R1 and the second reference position R2, thereby accurately confirming the connection position of the electrode sheet 10 and the connecting sheet 20. In addition, the operator's connection work time can be significantly shortened. In addition, regardless of the operator's technical level, the consistency of the connection work can be ensured.

[0115] Reference Figures 1 to 4 and Fig. 9 The splicing platform 140 includes a fixing platform 141 and an alignment platform 143 .

[0116] The electrode sheet 10 is placed on the upper surface of the fixing table 141. The fixing table 141 includes a lower fixing table 141a and an upper fixing table 141b placed on the lower fixing table 141a.

[0117] The alignment stage 143 is disposed between the fixing stage 141 and the rewinding roller 130. The alignment stage 143 is installed to be movable in the width direction of the electrode sheet 10 by the position alignment unit 170 so that the electrode sheet 10 is aligned with the connection position. The alignment stage 143 includes a lower alignment stage 143a and an upper alignment stage 143b placed on the upper surface of the lower alignment stage 143a. The upper alignment stage 143b and the lower alignment stage 143a move together in the width direction of the electrode sheet 10 by the position alignment unit 170.

[0118] A first fixing rod 145 is installed above the fixing table 141 to fix the electrode sheet 10. A second fixing rod 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 rod 145 and the second fixing rod 146 are lowered to fix the electrode sheet 10. The first fixing rod 145 and the second fixing rod 146 are arranged parallel to the width direction of the electrode sheet 10.

[0119] The position alignment unit 170 includes a stage alignment unit 171 and a rewinder alignment unit 173 .

[0120] The stage alignment unit 171 aligns the position of the splicing stage 140 so that the electrode sheet 10 is aligned with the first reference position R1. The stage alignment unit 171 moves the splicing stage 140 in the width direction of the electrode sheet 10. The stage alignment unit 171 may include a stepping motor, a linear motor, a hydraulic cylinder, etc. capable of accurate position control.

[0121] The rewinder alignment unit 173 aligns the position of the rewinding roller 130 so that the connecting sheet 20 is aligned with the second reference position R2. The rewinder alignment unit 173 moves the rewinding roller 130 in the width direction of the electrode sheet 10. The rewinder alignment unit 173 may include a stepping motor, a linear motor, a hydraulic cylinder, etc. capable of accurate position control.

[0122] When any one of the electrode sheet 10 and the connecting sheet 20 deviates from the first reference position R1 or the second reference position R2, only any one of the stage alignment unit 171 and the rewinder alignment unit 173 can be operated. In addition, 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 stage alignment unit 171 and the rewinder alignment unit 173 can be operated together.

[0123] The splicing table 140 may be made of a light-transmitting material. The light-transmitting material may include various materials, such as transparent acrylic resin, polyurethane resin, quartz, etc. Therefore, even if the camera unit 150 is disposed below or above the splicing table 140, the positions of the electrode sheet 10 and the connecting sheet 20 may be accurately determined. In addition, even if the guide pointer unit 160 is disposed inside or outside the splicing table 140, the first reference position R1 and the second reference position R2 of the electrode sheet 10 and the connecting sheet 20 may be accurately indicated on the splicing table 140 or the rewinding roller 130.

[0124] The electrode cutting device 100 may further include a light irradiation unit 180 that irradiates light to the splicing stage 140. Therefore, since the camera unit 150 reads the positions of the electrode sheet 10 and the connection sheet 20 while the light irradiation unit 180 irradiates light to the splicing stage 140, the position reading of the camera unit 150 may be more accurate.

[0125] The light irradiation unit 180 may be disposed below the splicing stage 140. Therefore, the light irradiation unit 180 may be installed to avoid the conveying path of the connection sheet 20. In addition, the degree of freedom of installation of the electrode incision device 100 may be increased.

[0126] The guide pointer unit 160 may include a first guide pointer 161 and a second guide pointer 162 .

[0127] The first guide pointer 161 indicates the first reference position R1 on the splicing table 140. The first guide pointer 161 indicates the first reference position R1 by irradiating the laser light spaced apart by a distance equal to the width of the electrode sheet 10 to the first reference position R1. Since the laser light irradiated by the first guide pointer 161 propagates in a straight line, the laser light can be prevented from diffracting or diffusing when passing through the air or the splicing table 140 made of a light-transmitting material. Therefore, the first reference position R1 can be accurately indicated.

[0128] The second guide pointer 162 indicates the second reference position R2 on the splicing table 140. The second guide pointer 162 indicates the second reference position R2 by irradiating the laser light spaced apart by a distance equal to the width of the connecting sheet 20 to the second reference position R2. Since the laser light irradiated by the second guide pointer 162 propagates in a straight line, the laser light can be prevented from diffracting or diffusing when passing through the air or the splicing table 140 made of a light-transmitting material. Therefore, the second reference position R2 can be accurately indicated.

[0129] The first guide pointer 161 and the second guide pointer 162 indicate the first reference position R1 and the second reference position R2 by linearly irradiating light to both ends in the width direction of the electrode sheet 10. Since the first reference position R1 and the second reference position R2 are indicated linearly, the twisting and meandering of the electrode sheet 10 and the connecting sheet 20 can be accurately confirmed.

[0130] At least one of the first guide pointer 161 and the second guide pointer 162 may be disposed below the splicing table 140. Therefore, the first guide pointer 161 or the second guide pointer 162 may be installed to avoid a transfer path of the electrode sheet 10.

[0131] The camera unit 150 may include a line scan camera 150 disposed in parallel with the width direction of the electrode sheet 10 and the connection sheet 20. The length of the line scan camera 150 may be slightly shorter than the width of the electrode sheet 10 and the connection sheet 20.

[0132] The camera unit 150 may be disposed below the splicing stage 140. Here, the light irradiation unit 180 may be disposed between the splicing stage 140 and the camera unit 150.

[0133] The electrode cutting device 100 may further include a foreign matter removing unit 190 installed on the splicing table 140 to remove foreign matter generated when cutting the electrode sheet 10 and the connecting sheet 20. Foreign matter generated when cutting the electrode sheet 10 and the connecting sheet 20 can be prevented from being attached to the electrode sheet 10 and the connecting sheet 20. Therefore, an increase in the defect rate due to foreign matter in subsequent processes can be prevented.

[0134] The foreign matter removing portion 190 includes an air inlet 191 and a blower 193 .

[0135] The air inlet 191 is provided on the splicing stage 140. The air inlet 191 is provided between the fixing stage 141 and the alignment stage 143 at a portion where the electrode sheet 10 is cut on the splicing stage 140.

[0136] The blower 193 is connected to the air inlet 191 to provide suction to the air inlet 191. The blower 193 is connected to the air inlet 191 through an air intake hose. The air intake hose is installed in a manner avoiding the light irradiation area of ​​the light irradiation unit 180 and the reading area of ​​the camera unit 150.

[0137] Figure 5 is a plan view schematically illustrating a state in which a splicing table and a rewinding roller align an electrode sheet and a connecting sheet in an electrode cutting device according to the present invention, Figure 6 is a plan view defining the positions of the electrode sheets and the connecting electrodes in the electrode cutting device according to the present invention, Figure 7 is a plan view schematically illustrating a positional deviation between an electrode sheet and a connecting electrode in the electrode cutting device according to the present invention.

[0138] Reference Figures 5 to 7, when the camera unit 150 irradiates light to the electrode sheet 10 and the connecting electrode 21, the positions of the electrode sheet 10 and the connecting electrode 21 are read. Here, the distance between one end (upper end) of the coating portion 11 of the electrode sheet 10 in the width direction and one end of the connecting electrode 21 in the width direction (first distance: G1), the distance between the end of the electrode contact 13 of the electrode sheet 10 and the electrode contact 13 of the connecting electrode 21 (second distance: G2), the distance between the end of the electrode contact 13 of the electrode sheet 10 and the other end in the length direction of the rewinding roller 130 (third distance: G3), and the distance between one end of the coating portion 11 of the electrode sheet 10 in the width direction and one end of the rewinding roller 130 (fourth distance: G4) are determined.

[0139] When the connection sheet 20 is the connection electrode 21, the first guide pointer 161 indicates the first reference position R1 so that the electrode sheet 10 and the connection electrode 21 are aligned. The second guide pointer 162 indicates the second reference position R2 so that the connection electrode 21 is wound at the center of the length direction of the rewinding roller 130. In addition, the first guide pointer 161 may indicate the first reference position R1 on the splicing table 140, and the second guide pointer 162 may indicate the second reference position R2 on the splicing table 140 or the rewinding roller 130.

[0140] The controller drives the stage alignment unit 171 to correct the first distance G1 and the second distance G2 to the same value, and the controller drives the rewinder alignment unit 173 to correct the third distance G3 and the fourth distance G4 to the same value. Here, the deviation correction of the first distance G1 and the second distance G2 is to align the electrode sheet 10 and the connecting sheet 20 with the first reference position R1. In addition, the deviation correction of the third distance G3 and the fourth distance G4 is to align the electrode sheet 10 and the connecting sheet 20 with the second reference position R2, and place the electrode sheet 10 and the connecting sheet 20 in the center of the length direction of the rewinding roller 130.

[0141] Figure 8 It is a plan view for determining the positions of an electrode sheet and a connecting film in an electrode cutting device according to the present invention.

[0142] Reference Figure 8, when the camera unit 150 irradiates light to the electrode sheet 10 and the connection film 23, the positions of the electrode sheet 10 and the connection film 23 are read. Here, the distance between one end (upper end) in the width direction of the coating portion 11 of the electrode sheet 10 and one end in the width direction of the connection film 23 (first distance: G1), the distance between the end of the electrode contact 13 of the electrode sheet 10 and the other end of the connection film 23 (second distance: G2), the distance between the end of the electrode contact 13 of the electrode sheet 10 and the other end in the length direction of the rewinding roller 130 (third distance: G3), and the distance between one end in the width direction of the coating portion 11 of the electrode sheet 10 and one end of the rewinding roller 130 (fourth distance: G4) are determined.

[0143] When the connection sheet 20 is a connection film 23, the first guide pointer 161 indicates the first reference position R1 so that the electrode sheet 10 is located at the center of the width direction of the connection film 23. Here, the second guide pointer 162 indicates the second reference position R2 so that the connection film 23 is wound at the center of the length direction of the rewinding roller 130. In addition, the first guide pointer 161 may indicate the first reference position R1 on the splicing table 140, and the second guide pointer 162 may indicate the second reference position R2 on the splicing table 140 or the rewinding roller 130.

[0144] The controller drives the stage alignment unit 171 to correct the first distance G1 and the second distance G2 to the same value, and the controller drives the rewinder alignment unit 173 to correct the third distance G3 and the fourth distance G4 to the same value. Here, the deviation correction of the first distance G1 and the second distance G2 is to align the electrode sheet 10 and the connecting film 23 with the first reference position R1. In addition, the deviation correction of the third distance G3 and the fourth distance G4 is to align the electrode sheet 10 and the connecting film 23 with the second reference position R2, and place the electrode sheet 10 and the connecting film 23 in the center of the length direction of the rewinding roller 130.

[0145] Although the present invention is described with reference to the exemplary drawings, it should be understood that the present invention is not limited to the embodiments and drawings disclosed in this specification, and those skilled in the art will understand that various modifications are possible without departing from the scope and concept of the present invention. In addition, although the operational effects of the construction according to the present invention are not explicitly described when describing the embodiments of the present invention, it should be understood that the foreseeable effects should also be realized through the construction.

Claims

1. An electrode cutting device, comprising: A cutout unit for forming an electrode tab at an uncoated portion of the electrode sheet; A rewinding roller for winding the connecting sheet; a splicing table on which the electrode sheet and the connecting sheet are placed, the splicing table being arranged between the cutting unit and the rewinding roller; a camera unit for photographing the positions of the electrode sheet and the connecting sheet placed 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 is configured to align the positions of the splicing table and the rewinding roller so that the electrode sheet is aligned with the first reference position and the connecting sheet is aligned with the second reference position.

2. The electrode cutting device according to claim 1, wherein the splicing station comprises: a fixing table on which the electrode sheet is placed; and An alignment stage is provided between the fixing stage and the rewinding roller and is installed to be movable in the width direction of the electrode sheet by the position alignment unit so that the electrode sheet is aligned with the first reference position.

3. The electrode cutting device according to claim 1, wherein a first fixing rod is installed above the fixing table to fix the electrode sheet, and A second fixing rod is installed above the alignment platform to fix the electrode sheet.

4. The electrode incision device according to claim 1, wherein the position alignment unit further comprises: a stage alignment unit, the stage alignment unit aligning the position of the splicing stage so that the electrode sheet is aligned with the first reference position; and A rewinder alignment unit aligns the position of the rewinding roller so that the connecting piece is aligned with the second reference position. The electrode cutting device according to claim 1 , wherein the splicing stage is made of a light-transmitting material. 6 . The electrode cutting device according to claim 5 , further comprising a light irradiation unit that irradiates light onto the splicing stage. 7 . The electrode cutting device according to claim 6 , wherein the light irradiation unit is provided below the splicing stage.

8. The electrode incision device according to claim 1, wherein the guide pointer unit comprises: a first guide pointer indicating the first reference position on the splicing table; and A second guide pointer indicates the second reference position on the splicing table or the rewinding roller. 9 . The electrode incision device according to claim 8 , wherein the first guide pointer and the second guide pointer indicate the first reference position and the second reference position by linearly irradiating light to both ends in a width direction of the electrode sheet. 10 . The electrode cutting device according to claim 8 , wherein at least one of the first guide pointer and the second guide pointer is disposed below the splicing station.

11. The electrode cutting device according to claim 8, wherein: When the connecting piece is a connecting electrode, The first guide pointer indicates the first reference position so that the electrode sheet and the connecting electrode are aligned, and The second guide pointer indicates the second reference position so that the connection electrode is wound at the center in the length direction of the rewinding roller.

12. The electrode cutting device according to claim 8, wherein: When the connecting sheet is a connecting film, The first guide pointer indicates the first reference position so that the electrode sheet is located at the center of the width direction of the connection film, and The second guide pointer indicates the second reference position so that the connection film is wound at the center in the length direction of the rewinding roller. 13 . The electrode incision device according to claim 1 , wherein the camera unit comprises a line scan camera disposed in parallel with a width direction of the electrode sheet and the connection sheet.

14. The electrode cutting device according to claim 1, wherein the camera unit is disposed below the stitching stage.

15. The electrode incision device according to claim 1, further comprising: A foreign matter removing unit is installed on the splicing table to remove foreign matter generated when the electrode sheet and the connecting sheet are cut.

16. The electrode incision device according to claim 15, wherein the foreign matter removing portion comprises: An air inlet disposed on the splicing table; and A blower is connected to the air inlet to provide suction to the air inlet.

17. A method for manufacturing an electrode, comprising: A step of placing the electrode sheet and the connecting sheet on the splicing table; The step of photographing the positions of the electrode sheet and the connecting sheet placed on the splicing table by using a camera unit; An indicating step of indicating a first reference position of the electrode sheet and a second reference position of the connecting sheet by guiding a pointer unit; as well as An alignment step is performed by aligning the positions of the splicing table and the rewinding roller by a position alignment unit so that the electrode sheet is aligned with the first reference position and the connecting sheet is aligned with the second reference position.

18. The electrode manufacturing method according to claim 17, wherein: In the indicating step, the guide pointer unit indicates the first reference position and the second reference position by irradiating light to both ends of the electrode sheet and the connecting sheet in a width direction.

19. The electrode manufacturing method according to claim 18, wherein: In the indicating step, The first reference positions are spaced apart by a distance equal to the width of the electrode sheet, and The second reference positions are spaced apart by a distance equal to a width of the connection piece.

20. The electrode manufacturing method according to claim 15, wherein: In the indicating step, the first guide pointer of the guide pointer unit indicates the first reference position on the splicing table, and The second guide pointer of the guide pointer unit indicates the second reference position on the rewinding roller. 21 . The electrode manufacturing method according to claim 20 , wherein the first guide pointer and the second guide pointer indicate the first reference position and the second reference position by linearly irradiating light to both ends in a width direction of the electrode sheet.

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

23. The electrode manufacturing method according to claim 22, wherein: In the shooting step, the controller determines: a first distance between one end of the coated portion of the electrode sheet in the width direction and one end of the connecting electrode in the width direction; 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 the end of the electrode tab of the electrode sheet and the other end in the length direction of the rewinding roller; and a fourth distance between the one end of the coated portion of the electrode sheet in the width direction and one end of the rewinding roller.

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

25. The electrode manufacturing method according to claim 24, wherein: In the photographing step, the controller determines: a first distance between one end of the coated portion of the electrode sheet in the width direction and one end of the connecting film in the width direction; a second distance between an end of an electrode contact of the electrode sheet and the other end of the connecting film; a third distance between the end of the electrode contact of the electrode sheet and the other end in the length direction of the rewinding roller; and a fourth distance between the one end of the coated portion of the electrode sheet in the width direction and one end of the rewinding roller.

26. The electrode manufacturing method according to claim 17, wherein: In the alignment step, the position of the splicing stage is aligned by the stage alignment unit of the position alignment unit so that the electrode sheet is aligned with the first reference position, and The position of the rewinding roller is aligned by the rewinder alignment unit of the position alignment unit so that the connecting piece is aligned with the second reference position.

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