Electrode manufacturing device and method

Abstract

An electrode manufacturing device, according to an embodiment of the present invention, may comprise: a transfer unit for transferring an electrode sheet; a contactless sensor for detecting the thickness of the electrode sheet; and a laser unit which radiates a laser beam such that the edge of the electrode sheet is notched into a preset shape, and of which the power is adjusted on the basis of the thickness detected by the contactless sensor.

Description

Electrode manufacturing device and method

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0003618, filed January 10, 2023, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to an electrode manufacturing device and method for manufacturing an electrode in which an electrode active material is coated on an electrode current collector.

[0005] Common types of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, and lithium-ion polymer batteries. These batteries are used in small products such as digital cameras, DVDs, MP3 players, mobile phones, PDAs, portable game devices, power tools, and e-bikes, as well as in larger products requiring high output, such as electric and hybrid vehicles, as well as power storage devices that store surplus power or renewable energy, and as backup power storage devices.

[0006] To manufacture an electrode assembly, electrodes and a separator are manufactured and laminated. The electrode can be manufactured by applying a slurry-type electrode active material to a foil-type current collector.

[0007] Specifically, a cathode can be manufactured by applying a cathode active material slurry to a cathode current collector, and an anode can be manufactured by applying a cathode active material slurry to a cathode current collector. Then, when a separator is interposed between the manufactured cathode and anode and they are laminated, unit cells are formed, and when the unit cells are laminated to each other, an electrode assembly is formed. Then, when this electrode assembly is accommodated in a specific case and an electrolyte is injected, a secondary battery is manufactured.

[0008] Meanwhile, the process for manufacturing electrodes is divided into an active material mixing process, an electrode coating process, a rolling process, a notching process, and a cutting process. Among these, the notching process is a process for forming an electrode tab by notching a non-coated portion formed on one side of an electrode current collector and not coated with an electrode active material.

[0009] This notching process can be accomplished using a laser. Compared to press-assisted notching, laser-assisted notching offers the advantage of being able to form delicate shapes in the blank area and reducing mold maintenance and mold replacement costs.

[0010] However, the laser-assisted notching process is significantly affected by the thickness of the material (i.e., the electrode). Therefore, if the material is thick, defects such as incomplete cutting or partial undercutting may occur. Conversely, if the material is thin, excessive cutting may occur, exposing the electrode active material coated on the current collector, resulting in the current collector being exposed. Therefore, a technology is required to address quality deviations or defects related to material thickness.

[0011] KR2021-0125281A (published on October 18, 2021) is a prior art document regarding the present disclosure.

[0012] The problem to be solved by the present invention is to provide an electrode manufacturing device and method capable of manufacturing a high-quality electrode by automatically adjusting the output of a laser beam that notches the edge of the electrode sheet according to the thickness of the electrode sheet.

[0013] An electrode manufacturing device according to an embodiment of the present invention may include a transport unit for transporting an electrode sheet; a non-contact sensor for detecting a thickness of the electrode sheet; and a laser unit for irradiating a laser beam so that an edge of the electrode sheet is notched into a preset shape, and the output of which is controlled based on the thickness detected by the non-contact sensor.

[0014] The above laser unit may be positioned behind the non-contact sensor with respect to the transport direction of the electrode sheet.

[0015] The above non-contact sensor can detect the thickness of the maintenance portion coated with the electrode active material on the electrode sheet.

[0016] The above laser unit forms an electrode tab by notching a non-conductive portion located on one side of the width direction of the maintenance portion, and a part of the maintenance portion can be notched together with the non-conductive portion.

[0017] The above non-contact sensor may include a pair of non-contact displacement sensors arranged facing each other with the electrode sheet interposed therebetween.

[0018] The above electrode manufacturing device may further include a display that displays the thickness of the electrode sheet detected by the non-contact sensor.

[0019] The laser unit may include a beam source that emits a laser beam; and a scanner that varies the path of the laser beam emitted from the beam source so that the laser beam notches the edge of the electrode sheet into a predetermined shape. The output of the beam source may be adjusted based on the thickness detected by the non-contact sensor.

[0020] A method for manufacturing an electrode according to an embodiment of the present invention may include a step of a transport unit transporting an electrode sheet; a step of a non-contact sensor detecting a thickness of the electrode sheet; and a step of a laser unit irradiating a laser beam so that an edge of the electrode sheet is notched into a preset shape. In the step of irradiating the laser beam, the output of the laser unit may be adjusted based on the thickness detected in the step of detecting the thickness of the electrode sheet.

[0021] In the step of detecting the thickness of the electrode sheet, the non-contact sensor can detect the thickness of the electrode sheet in real time or at regular intervals.

[0022] In the step of irradiating the laser beam, if the thickness detected by the non-contact sensor is smaller than the set range, the output of the laser unit may be reduced, and if the thickness detected by the non-contact sensor is larger than the set range, the output of the laser unit may be increased.

[0023] According to a preferred embodiment of the present invention, since the output of the laser unit is automatically adjusted according to the thickness of the electrode sheet detected by the non-contact sensor, the reliability and speed of the notching process can be improved, and high-quality electrodes can be manufactured, compared to a case where an operator manually checks the thickness of the electrode sheet and manually adjusts the output of the laser unit.

[0024] In addition, since the portion of the current collector where the electrode active material is thickly coated is notched with a relatively strong output, it is possible to prevent uncutting or partial uncutting from occurring.

[0025] In addition, since the portion of the current collector where the electrode active material is thinly coated is notched with a relatively weak output, quality deviation or exposure of the current collector can be prevented.

[0026] In addition, the configurations according to preferred embodiments of the present invention may include effects that can be easily predicted by those skilled in the art.

[0027] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0028] Figure 1 is a configuration diagram of an electrode manufacturing device according to one embodiment of the present invention.

[0029] Figure 2 is a control block diagram of an electrode manufacturing device according to one embodiment of the present invention.

[0030] Figure 3 is a schematic diagram showing the electrode sheet illustrated in Figure 1 being notched.

[0031] Fig. 4 is a cross-sectional view showing the non-contact sensor illustrated in Fig. 1 detecting the thickness of an electrode sheet.

[0032] FIG. 5 is an enlarged view of the edge of an electrode sheet notched by a laser unit according to one embodiment of the present invention.

[0033] FIG. 6 and FIG. 7 are enlarged views of the edge of the electrode where a defect occurred during the notching process, as a comparative example of the electrode sheet illustrated in FIG. 5.

[0034] Figure 8 is a flowchart of an electrode manufacturing method according to another embodiment of the present invention.

[0035] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the invention. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

[0036] In order to clearly explain the present invention, a detailed description of a part that is irrelevant to the description or a related known technology that may unnecessarily obscure the gist of the present invention has been omitted, and when adding reference signs to components of each drawing in this specification, the same or similar reference signs are attached to the same or similar components throughout the specification.

[0037] In addition, terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0038] FIG. 1 is a block diagram of an electrode manufacturing device according to an embodiment of the present invention, FIG. 2 is a control block diagram of an electrode manufacturing device according to an embodiment of the present invention, FIG. 3 is a schematic diagram showing an electrode sheet shown in FIG. 1 being notched, and FIG. 4 is a cross-sectional view showing a non-contact sensor shown in FIG. 1 detecting the thickness of the electrode sheet. It is to be noted that FIG. 4 shows a cross-section along line A-A' of FIG. 3 to help those skilled in the art understand.

[0039] An electrode manufacturing device according to one embodiment of the present invention can manufacture an electrode by laser notching an electrode sheet (10). The electrode sheet (10) may be in the shape of a long sheet with a predetermined width.

[0040] An electrode sheet (10) can be manufactured by coating an electrode active material (10b) on a current collector (10a) (see FIG. 4). More specifically, the electrode sheet (10) can be manufactured by coating an electrode active material (10b) on a current collector (10a), then drying and pressing it. If necessary, a conductive agent, a binder, a filler, etc. can be optionally included in the electrode active material (10b).

[0041] The current collector (10a) may be in the shape of a sheet. The current collector (10a) can generally be manufactured to a thickness of 3 to 500 μm. The current collector (10a) can typically be manufactured from a material that does not cause chemical changes and has electrical conductivity.

[0042] The current collector (10a) may have fine unevenness formed on its surface to increase the adhesive strength of the electrode active material (10b). The current collector (10a) may be manufactured in various forms, such as a film, sheet, foil, net, porous body, foam, or non-woven fabric.

[0043] If the electrode manufactured by the electrode manufacturing device (100) is a positive electrode, the current collector (10a) may be a positive electrode current collector, and the electrode active material (10b) may be a positive electrode active material.

[0044] For example, the positive electrode collector may include at least one selected from the group consisting of stainless steel, aluminum, nickel, titanium, calcined carbon, and aluminum. Alternatively, the positive electrode collector may be formed by surface-treating the surface of stainless steel with carbon, nickel, titanium, silver, or the like. However, the present invention is not limited thereto.

[0045] For example, the cathode active material may include layered compounds such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or compounds substituted with one or more transition metals; lithium manganese oxide; lithium copper oxide (Li2CuO2); vanadium oxide; nickel (Ni)-site type lithium nickel oxide; lithium manganese composite oxide; disulfide compounds, etc., but is not limited thereto.

[0046] If the electrode manufactured by the electrode manufacturing device (100) is a negative electrode, the current collector (10a) may be a negative electrode current collector, and the electrode active material (10b) may be a negative electrode active material.

[0047] For example, the negative electrode current collector may include at least one selected from the group consisting of copper, stainless steel, aluminum, nickel, titanium, and calcined carbon. Alternatively, the negative electrode current collector may be copper or stainless steel surface-treated with carbon, nickel, titanium, silver, or the like, or may include an aluminum-cadmium alloy. However, the present invention is not limited thereto.

[0048] For example, the negative active material may include carbon such as non-graphitizable carbon and graphitic carbon; metal composite oxide; lithium metal; lithium alloy; silicon-based alloy; tin-based alloy; metal oxide; conductive polymer such as polyacetylene; Li-Co-Ni-based material, etc. However, the present invention is not limited to these.

[0049] The electrode sheet (10) may include a holding portion (11) on which an electrode active material (10b) is coated on a current collector (10a), and a non-conductive portion (12) on which an electrode active material (10b) is not coated on a current collector (10a).

[0050] The holding portion (11) can be formed by coating an electrode active material (10b) on at least one surface of a current collector (10a). The thickness (t) of the holding portion (11) (see FIG. 4) can mean the sum of the thickness of the current collector (10a) and the thickness of the electrode active material (10b).

[0051] The non-coated portion (12) may be a portion where the electrode active material (10b) is not coated so that the current collector (10a) is exposed. The non-coated portion (12) may be located on one or both sides of the widthwise portion of the holding portion (11). That is, the non-coated portion (12) may be located on one edge of the widthwise portion of the electrode sheet (10) or on both edges of the widthwise portion.

[0052] When the uncoated portion (12) is located at both edges in the width direction, the width of one of the two uncoated portions (12) may be wider than the other. In this case, as illustrated in FIG. 3, one uncoated portion (12) having a relatively wide width may be notched to form an electrode tab (13), and the other uncoated portion (12) having a relatively narrow width may be removed by a notching process. The notching process may refer to a process of processing the uncoated portion (12) into a preset shape, and may be performed by a laser unit (130) to be described later.

[0053] Meanwhile, an electrode manufacturing device according to one embodiment of the present invention may include a transport unit (110) for transporting an electrode sheet (10), a non-contact sensor (120) for detecting the thickness of the electrode sheet (10), and a laser unit (130) for irradiating a laser beam so that an edge of the electrode sheet (10) is notched into a preset shape.

[0054] The electrode sheet (10) can be unwound from the unwinder (101).

[0055] The transport unit (11) can transport the electrode sheet (10). The transport unit (110) can include a roll that rotates and transports the electrode sheet (10). A plurality of transport units (110) can be provided along the transport direction of the electrode sheet (10).

[0056] The non-contact sensor (120) can detect the thickness of the electrode sheet (10) in real time. However, it is not limited thereto, and the non-contact sensor (120) can also detect the thickness of the electrode sheet (10) at regular intervals.

[0057] Preferably, the non-contact sensor (120) can detect the thickness (t) of the holding portion (11) of the electrode sheet (10). That is, the non-contact sensor (120) can be directed toward the holding portion (11) of the electrode sheet (10). This is because, when coating the electrode active material (10b) on the current collector (10a), a deviation in the coating thickness may occur, so it is important to precisely detect the thickness (t) of the holding portion (11).

[0058] The non-contact sensor (120) may include a pair of non-contact displacement sensors (121)(122) positioned opposite each other with an electrode sheet (10) therebetween. For example, the non-contact displacement sensors (121)(122) may be reflective laser displacement sensors using a confocal method or a spectral interference method. Since the operating principles of such non-contact displacement sensors are well known in the art, a detailed description thereof will be omitted.

[0059] A pair of non-contact displacement sensors (121)(122) can be arranged to face each other with an electrode sheet (10), more specifically, a retainer (11) between them. Each non-contact displacement sensor (121)(122) can detect the distance to an object, i.e., an electrode sheet (10).

[0060] In more detail, the first non-contact displacement sensor (121) can detect a first distance (l1) to one side of the electrode sheet (10), and the second non-contact displacement sensor (122) can detect a second distance (l2) to the other side of the electrode sheet (10). The first distance (l1) may mean a displacement of one side of the electrode sheet (10) based on the first non-contact displacement sensor (121). The second distance (l2) may mean a displacement of the other side of the electrode sheet (10) based on the second non-contact displacement sensor (122).

[0061] The distance (l0) between a pair of non-contact displacement sensors (121)(122) can be predetermined. Accordingly, a value (l0-l1-l2) obtained by subtracting the first distance (l1) and the second distance (l2) from the distance (l0) between a pair of non-contact displacement sensors (121)(122) can be calculated as the thickness (t) of the electrode sheet (10), more specifically, the holding portion (11). Accordingly, even if the electrode sheet (10) moves or shakes between the pair of non-contact displacement sensors (121)(122), the thickness of the electrode sheet (10) can be accurately detected.

[0062] The laser unit (130) can notch the edge of the electrode sheet (10) by irradiating a laser beam. That is, the laser unit (130) can be a laser notching device that notches the edge of the electrode sheet (10) into a preset shape.

[0063] In more detail, the laser unit (130) can form electrode tabs (13) by notching the non-cut portion (12). The electrode tabs (13) may be non-cut portions (12) that remain. The electrode tabs (13) can be formed at predetermined intervals along the length direction of the electrode sheet (10).

[0064] In particular, when the uncoated portions (12) are located at both edges of the electrode sheet (10), the laser unit (130) can notch one uncoated portion (12) having a wider width among the two uncoated portions (12) so that an electrode tab (13) is formed, and can notch the other uncoated portion (12) so that it is removed. Although only a single laser unit (130) is illustrated in FIG. 1, those skilled in the art will clearly understand that a pair of laser units (130) for notching the one uncoated portion (12) and the other uncoated portion (12) can be separately provided.

[0065] The laser unit (130) can notch the electrode sheet (10) along a virtual notching line (indicated by a dotted line in FIG. 3). In the electrode sheet (10), the outside of the notching line can be cut off and removed.

[0066] The laser unit (130) can notch a portion of the holding portion (11) together with the non-conductive portion (12), taking into account the tolerance. Accordingly, the edge (11a) of the holding portion (11) in the electrode sheet (10) that has passed through the laser unit (130) can be a portion notched by the laser beam.

[0067] The laser unit (130) may be positioned behind the non-contact sensor (120) with respect to the transport direction of the electrode sheet (10). The output of the laser unit (130) may be adjusted based on the thickness detected by the non-contact sensor (120).

[0068] In more detail, the laser unit (130) may include a beam source (131) that emits a laser beam, and a scanner (132) that varies the path of the laser beam so that the laser beam emitted from the beam source (131) notches the edge of the electrode sheet (10) into a preset shape. The configuration and operating principle of the laser notching device are well known in the art, so a detailed description thereof will be omitted. In addition, the output of the beam source (131) may be adjusted based on the thickness detected by the non-contact sensor (120).

[0069] In this way, the electrode sheet (10), more specifically, the edge (11a) of the holding portion (11), can be precisely notched. In addition, since the output of the laser unit (130) is automatically adjusted according to the detected thickness of the non-contact sensor (120), the reliability and speed of the notching process can be improved compared to a case where an operator manually checks the thickness of the electrode sheet (10) and manually adjusts the output of the laser unit (130).

[0070] The electrode sheet (10) notched by the laser unit (130) can be wound on a rewinder (102).

[0071] Meanwhile, the electrode manufacturing device may further include a controller (140). The controller (140) may include at least one processor and may control the overall operation of the electrode manufacturing device.

[0072] The controller (140) can control the on / off and speed of the transport unit (110), but is not limited thereto. In addition, although not shown in FIG. 2, the controller (140) can control the on / off and speed of the unwinder (101) and the rewinder (102).

[0073] The controller (140) can receive thickness data detected by the non-contact sensor (120). The controller (140) can control the output of the laser unit (130) based on the thickness data. More specifically, the controller (140) can maintain the output of the laser unit (130) if the thickness detected by the non-contact sensor (120) is within a preset range, and can adjust the output of the laser unit (130) if the thickness detected by the non-contact sensor (120) is outside the preset range.

[0074] In more detail, the controller (140) can reduce the output of the laser unit (130) when the thickness detected by the non-contact sensor (120) is thinner than the lower limit of the preset range, and can increase the output of the laser unit (130) when the thickness detected by the non-contact sensor (120) is thicker than the upper limit of the preset range.

[0075] Accordingly, the portion of the current collector (10a) where the electrode active material (10b) is thickly coated is notched with a relatively strong output, thereby preventing uncutting or partial uncutting from occurring. In addition, the portion of the current collector (10a) where the electrode active material (10b) is thinly coated is notched with a relatively weak output, thereby preventing quality deviations or exposure of the current collector (10a).

[0076] The electrode manufacturing device may further include a display (150) on which the thickness of the electrode sheet (10) detected by the non-contact sensor (120) is displayed. The display (150) may communicate with the controller (140). The controller (140) may display the thickness data received from the non-contact sensor (120) on the display (150) in real time. Accordingly, the operator may easily check the thickness of the electrode sheet (10) and the resulting change in the output of the laser unit (130).

[0077] FIG. 5 is an enlarged view of the edge of an electrode sheet notched by a laser unit according to one embodiment of the present invention, and FIGS. 6 and 7 are enlarged views of the edge of an electrode that has been defective during the notching process, as comparative examples of the electrode sheet illustrated in FIG. 5.

[0078] In Fig. 5, an edge (11a) of a retaining portion (11) notched by a laser unit (130) of a manufacturing device according to one embodiment of the present invention is shown in an enlarged view. Referring to Fig. 5, it can be confirmed that the edge (11a) of the retaining portion (11) notched by the laser unit (130) is cleanly cut without any uncutting. This is because, as described above, the output of the laser unit (130) is appropriately adjusted according to the thickness of the retaining portion (11) detected by the non-contact sensor (120).

[0079] In Fig. 6, an enlarged view is shown of the edge (11a) of the retaining portion (11) notched by a laser beam with a low output compared to the thickness of the retaining portion (11). Referring to Fig. 6, it can be confirmed that the edge (11a) of the retaining portion (11) is not cleanly cut, and a defect occurs in which it is partially uncut.

[0080] In Fig. 7, an edge (11a) of the retaining portion (11) is enlarged and shown as notched by a laser beam with a strong output compared to the thickness of the retaining portion (11). Referring to Fig. 7, it can be confirmed that a defect occurs in which the edge (11a) of the retaining portion (11) is excessively cut, causing the electrode active material (10b) to peel off and the current collector (10a) to be exposed.

[0081] In conclusion, the manufacturing device according to one embodiment of the present invention can eliminate concerns about quality deviation or quality defects in electrodes.

[0082] Figure 8 is a flowchart of an electrode manufacturing method according to another embodiment of the present invention.

[0083] Hereinafter, an electrode manufacturing method performed by the electrode manufacturing device described above will be described as another embodiment of the present invention.

[0084] A method for manufacturing an electrode according to another embodiment of the present invention may include a step (S10) in which a transport unit (110) transports an electrode sheet (10), a step (S20) in which a non-contact sensor (120) detects the thickness of the electrode sheet (10), and a step (S30) in which a laser unit (130) irradiates a laser beam so that an edge of the electrode sheet (10) is notched into a preset shape.

[0085] In the step (S10) of transporting the electrode sheet (10), the transport unit (110) can transport the electrode sheet (10). The step (S10) of transporting the electrode sheet (10) can be continued continuously or discontinuously in other steps (S20 and S30).

[0086] In the step (S20) of detecting the thickness of the electrode sheet (10), the non-contact sensor (120) can detect the thickness of the electrode sheet (10), more specifically, the thickness of the holding portion (11). The non-contact sensor (120) can detect the thickness of the electrode sheet (10) in real time or at regular intervals. The thickness data detected by the non-contact sensor (120) can be displayed on the display (150).

[0087] In the step of irradiating the laser beam (S30), the output of the laser unit (130) can be adjusted based on the thickness detected in the step of detecting the thickness of the electrode sheet (10) (S20).

[0088] In more detail, if the thickness detected by the non-contact sensor (120) is within a preset range, the laser unit (130) can irradiate a laser beam of existing output to notch the edge of the electrode sheet (10) into a preset shape (S32). On the other hand, if the thickness detected by the non-contact sensor (120) is outside the preset range, the laser unit (130) can irradiate a laser beam of controlled output to notch the edge of the electrode sheet (10) into a preset shape (S31)(S32).

[0089] In more detail, in the step (S30) of investigating the laser beam, if the thickness detected by the non-contact sensor (120) is smaller than the set range, the output of the laser unit (130) may be reduced, and if the thickness detected by the non-contact sensor (120) is larger than the set range, the output of the laser unit (130) may be increased.

[0090] By the step of irradiating the laser beam (S30), electrode tabs (13) can be formed at regular intervals on the electrode sheet (10). Thereafter, the electrode sheet (10) on which the electrode tabs (13) are formed can be wound on a rewinder (102). Those skilled in the art will readily understand that such an electrode sheet (10) can be cut at regular length intervals in a subsequent process to be processed into a unit electrode having a single electrode tab (13).

[0091] The above description is merely an example of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention.

[0092] Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of ​​the present invention but to explain it, and the scope of the technical idea of ​​the present invention is not limited by these embodiments.

[0093] The scope of protection of the present invention should be interpreted by the claims below, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0094] [Explanation of symbols]

[0095] 10: Electrode sheet 10a: Current collector

[0096] 10b: Electrode active material 11: Maintenance part

[0097] 11a: (of the maintenance section) edge 12: unmaintained section

[0098] 13: Electrode Tab 101: Unwinder

[0099] 102: Rewinder 110: Transfer unit

[0100] 120: Non-contact sensor 130: Laser unit

[0101] 140; Controller 150: Display

Claims

1. A transport unit for transporting an electrode sheet; A non-contact sensor for detecting the thickness of the electrode sheet; and An electrode manufacturing device including a laser unit that irradiates a laser beam so that the edge of the electrode sheet is notched into a preset shape and whose output is controlled based on the thickness detected by the non-contact sensor.

2. In paragraph 1, The above laser unit is an electrode manufacturing device positioned behind the non-contact sensor with respect to the transport direction of the electrode sheet.

3. In paragraph 1, The above non-contact sensor is an electrode manufacturing device that detects the thickness of a maintenance portion coated with an electrode active material on the electrode sheet.

4. In paragraph 3, The above laser unit, An electrode manufacturing device that forms an electrode tab by notching a non-conductive portion located on one side of the width direction of the above-mentioned maintenance portion, and notches a part of the above-mentioned maintenance portion together with the non-conductive portion.

5. In paragraph 1, The above non-contact sensor, An electrode manufacturing device comprising a pair of non-contact displacement sensors arranged facing each other with the electrode sheet interposed therebetween.

6. In paragraph 1, An electrode manufacturing device further comprising a display for displaying the thickness of the electrode sheet detected by the non-contact sensor.

7. In paragraph 1, The above laser unit, a beam source emitting a laser beam; and A scanner is included that changes the path of the laser beam so that the laser beam emitted from the beam source notches the edge of the electrode sheet into a preset shape. An electrode manufacturing device in which the output of the beam source is controlled based on the thickness detected by the non-contact sensor.

8. A step in which the transport unit transports the electrode sheet; A step in which a non-contact sensor detects the thickness of the electrode sheet; A step of irradiating a laser beam by a laser unit so that the edge of the electrode sheet is notched into a preset shape, An electrode manufacturing method in which, in the step of irradiating the laser beam, the output of the laser unit is controlled based on the thickness detected in the step of detecting the thickness of the electrode sheet.

9. In paragraph 8, A method for manufacturing an electrode, wherein, in the step of detecting the thickness of the electrode sheet, the non-contact sensor detects the thickness of the electrode sheet in real time or at regular intervals.

10. In paragraph 8, In the step of irradiating the above laser beam, If the thickness detected by the non-contact sensor is less than the set range, the output of the laser unit is reduced. An electrode manufacturing method in which the output of the laser unit increases when the thickness detected by the non-contact sensor is greater than a set range.

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