Electrode tape inspection device and electrode tape inspection method using same

Abstract

An electrode tape inspection device of the present invention is an electrode tape inspection device for continuously inspecting dimensions of an electrode and a tape attached to the electrode during an electrode taping process, and detecting foreign substances present on the electrode and the tape. The electrode tape inspection device comprises: a photographing unit provided to photograph the electrode and the tape attached to the electrode; a dimension measurement light unit provided to illuminate the tape to measure dimensions of the tape and the electrode; and a foreign substance detection light unit provided to illuminate the tape to detect foreign substances present on the tape and the electrode.

Description

Electrode tape inspection device and electrode tape inspection method using the same

[0001] The present invention relates to an electrode tape inspection device and an electrode tape inspection method using the same, and more specifically, to an electrode tape inspection device capable of quickly and accurately performing dimensional inspection and foreign matter inspection of an electrode and a tape, and an electrode tape inspection method using the same.

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0006371, filed January 15, 2024, the entire contents of which are incorporated herein by reference.

[0003] Recently, rechargeable secondary batteries have been widely used as a power source for wireless mobile devices. Furthermore, secondary batteries are also attracting attention as a potential energy source for electric and hybrid electric vehicles, which are being proposed as a solution to air pollution caused by existing gasoline and diesel vehicles that use fossil fuels. Consequently, the applications that utilize secondary batteries are diversifying significantly due to their advantages, and it is expected that secondary batteries will be applied to a wider range of fields and products in the future.

[0004] Secondary batteries are capable of repeated charging and discharging. Examples include lithium-ion batteries, lithium polymer batteries, and nickel-metal hydride batteries. Secondary batteries are used in a variety of applications, including electric vehicles, smartphones, and laptops, and are recognized as a core energy storage and conversion technology.

[0005] The secondary battery manufacturing process can be broadly divided into electrode manufacturing, electrode assembly, and battery activation. The electrode manufacturing process involves mixing the active materials of the positive and negative electrodes, conductive agents, and binders to create a slurry. This slurry is then coated onto a metal current collector, such as a copper or aluminum sheet, and dried. The electrode assembly process involves stacking or winding the manufactured electrodes and separators to create the basic battery structure, followed by injecting and sealing the electrolyte. The battery activation process involves repeated charging and discharging to activate the battery's performance.

[0006] Figure 1 is a schematic diagram showing the appearance of an electrode with an insulating tape attached according to the prior art.

[0007] Referring to Fig. 1, an insulation taping process is required in the manufacturing process of such electrodes. The insulation taping process is a process of attaching an insulation tape (20) to at least a portion of the electrode to prevent an electrical short circuit from occurring even if the electrode (10) comes into contact with an external structure or material while being conveyed by a roller (65). In the insulation taping process, it is necessary to precisely control the position of the insulation tape (20) on the electrode (10), the tape width, the tape length, and the extent to which the electrode is covered (overlapped) by the tape.

[0008] For example, if the position where the insulating tape (20) is attached to the electrode (10) is not appropriate, the overlapping width is too narrow or wide, the length of the attached tape is insufficient or excessive, etc., if an insulating tape of an appropriate size is not attached to the appropriate position, there is a risk that a short circuit may occur with external metal, or the electrodes may catch fire due to a short circuit occurring between the electrodes.

[0009] Therefore, in the insulation taping process, an inspection device was needed to accurately measure the width size of the tape, the position of the tape attached to the electrode, the width size of the tape overlapped with the electrode, etc., and to control the settings of the insulation tape attachment process.

[0010] In addition, during the insulation taping process, it was necessary to detect floating foreign substances, metallic foreign substances, etc., that were introduced into the insulation tape and electrodes and classify defective electrodes, so a separate foreign substance inspection device was used.

[0011] However, conventional secondary battery process electrode insulation taping inspection devices have the following problems.

[0012] Fig. 2 is a schematic diagram showing a process of inspecting an electrode (10) to which an insulating tape (20) of the prior art is attached.

[0013] First, as shown in Fig. 2, a separate photographing camera (30) was required to measure the dimensional elements of the tape (20) attached to the electrode (10) and a separate photographing camera (40) to inspect foreign substances present in the electrode (10) and the tape (20). This increased the number of inspection devices, thereby increasing the complexity of the inspection process, increasing the cost of purchasing the inspection device and performing the inspection, and also increasing the inspection time.

[0014] To solve these problems, it is necessary to develop inspection devices and methods that can be applied to the manufacturing process of secondary batteries.

[0015] The present invention aims to solve problems occurring in the taping process of electrodes of conventional secondary batteries.

[0016] Through one embodiment of the present invention, it is intended to provide an electrode tape inspection device and an electrode tape inspection method that can quickly and accurately perform dimensional inspection and foreign matter inspection of electrodes and tapes by including a photographing unit, lighting for dimensional measurement, and lighting for foreign matter detection.

[0017] In order to achieve the above-described object, according to one embodiment of the present invention, there is provided an electrode tape inspection device for performing dimensional inspection of an electrode and a tape attached to the electrode in an electrode taping process, and detecting foreign substances present in the electrode and the tape, the electrode tape inspection device including a photographing unit configured to photograph the electrode and the tape attached to the electrode, a dimension measuring light configured to illuminate the tape to measure the dimensions of the tape and the electrode, and a foreign substance detection light configured to illuminate the tape to detect foreign substances present in the tape and the electrode.

[0018] The above electrode tape inspection device can continuously perform dimensional inspection and foreign matter detection.

[0019] The above photographing unit may be arranged to photograph the electrode being transported and the tape attached to the electrode.

[0020] The above shooting unit may be a bar-type camera.

[0021] The lighting for the above-mentioned dimension measurement can illuminate the tape and the electrode so that regular reflection occurs.

[0022] The lighting for the above-mentioned dimensional measurement may be diffuse lighting that diffuses light emitted from a light source and then illuminates it.

[0023] The above foreign substance detection light can illuminate the foreign substance so that boundary reflection occurs.

[0024] The above foreign substance detection light may be a focusing light that illuminates light gathered from a light source to one point.

[0025] The image received from the above-mentioned photographing unit may further include a control unit configured to divide the image into pixels and group them into odd pixels and even pixels, and adjust the brightness of each of the grouped odd pixels and even pixels differently.

[0026] The above control unit can adjust the odd pixel group of the image to be relatively darker than the even pixel group, and generate an image for tape dimension inspection based on the odd pixels whose brightness has been adjusted.

[0027] The above control unit may be configured to adjust an even pixel group of the image to be relatively brighter than an odd pixel group, and generate an image for detecting tape foreign matter based on the even pixels whose brightness has been adjusted.

[0028] In order to achieve the above-described purpose, according to one embodiment of the present invention, a tape inspection method for electrodes is provided, which inspects the dimensions of a tape using an electrode tape inspection device and detects foreign substances present in the tape.

[0029] The above electrode tape inspection method can be arranged to continuously perform dimensional inspection and foreign matter detection.

[0030] Specifically, the above electrode tape inspection method includes an electrode supply step in which a supply unit supplies an electrode with a tape attached to a measurement position, a dimension measurement lighting step in which the dimension measurement lighting illuminates the tape to measure the dimensions of the tape and the electrode, a foreign matter detection lighting step in which the foreign matter detection lighting illuminates the tape to detect foreign matters present in the tape and the electrode, and a photographing step in which the photographing unit photographs the electrode with the tape attached.

[0031] The above electrode tape inspection method may further include a grouping step in which the control unit divides the image received from the photographing unit into pixels and groups the pixels into odd pixels and even pixels; and a brightness control step in which the control unit controls each of the grouped odd pixel groups and the even pixel groups to different brightnesses.

[0032] The above control unit can adjust the odd pixel group of the image to be relatively darker than the even pixel group in the above brightness adjustment step.

[0033] The above electrode tape inspection method may further include a dimension inspection image generation step of generating an image for tape dimension inspection based on the odd pixel group with adjusted brightness.

[0034] The above control unit can adjust the even pixel group of the image to be relatively brighter than the odd pixel group in the above brightness adjustment step.

[0035] The above electrode tape inspection method may include a foreign matter detection image generation step of generating an image for detecting foreign matter on the tape based on the even pixels whose brightness is adjusted.

[0036] As described above, the electrode tape inspection device and the electrode tape inspection method using the same according to at least one embodiment of the present invention have the following effects.

[0037] Through one embodiment of the present invention, by including a photographing unit, a light for measuring dimensions, and a light for detecting foreign substances, it is possible to quickly and accurately perform dimensional inspection and foreign substance inspection of electrodes and tapes.

[0038] In addition, the electrode tape inspection device of the present invention can perform both dimensional inspection and foreign matter inspection of the electrode and tape through image data captured by a single photographing unit, thereby effectively reducing the cost of the inspection device and image processing cost.

[0039] Figure 1 is a schematic diagram showing the appearance of an electrode with an insulating tape attached according to the prior art.

[0040] Figure 2 is a schematic diagram showing a process for inspecting an electrode with an insulating tape attached according to the prior art.

[0041] Figure 3 is a conceptual diagram conceptually illustrating the configurations of an electrode tape inspection device according to one embodiment of the present invention.

[0042] FIG. 4 is a schematic diagram showing an electrode with an insulating tape attached thereto being inspected using an electrode tape inspection device according to one embodiment of the present invention.

[0043] Fig. 5 is a partially enlarged view schematically showing an enlarged view of area A of the electrode tape inspection device of Fig. 4.

[0044] FIG. 6 is a perspective view schematically showing some components of an electrode tape inspection device according to one embodiment of the present invention.

[0045] FIG. 7 is a diagram conceptually illustrating an image processing process of an electrode tape inspection device according to one embodiment of the present invention.

[0046] FIG. 8 is a photograph showing an image generated for dimensional inspection by an electrode tape inspection device according to one embodiment of the present invention.

[0047] FIG. 9 is a photograph showing an image generated by an electrode tape inspection device according to one embodiment of the present invention for foreign matter inspection.

[0048] Figure 10 is a flowchart showing steps of a method for inspecting an electrode tape according to one embodiment of the present invention.

[0049] Hereinafter, an electrode tape inspection device and an electrode tape inspection method according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0050] In addition, regardless of the drawing symbol, identical or corresponding components are given identical or similar reference numbers and redundant descriptions thereof are omitted, and for the convenience of explanation, the size and shape of each component depicted may be exaggerated or reduced.

[0051] Fig. 3 is a conceptual diagram conceptually illustrating the configuration of an electrode tape inspection device (100) according to one embodiment of the present invention. Fig. 4 is a schematic diagram schematically illustrating an electrode (10) to which an insulating tape (20) is attached, being inspected using an electrode tape inspection device (100) according to one embodiment of the present invention. In addition, Fig. 5 is a partially enlarged view schematically illustrating an enlarged view of area A of the electrode tape inspection device of Fig. 4.

[0052] Referring again to FIGS. 3 and 5 together with FIG. 1, an electrode tape inspection device (100) according to an embodiment of the present invention performs dimensional inspection of an electrode (10) supplied by a supply unit (180) and a tape (20) attached to the electrode (10) in an electrode taping process, and detects foreign substances present in the electrode (10) and the tape (20). The photographing unit (110) may be provided to photograph the electrode (10) and the tape (20) attached to the electrode (10) while being continuously transported by the supply unit (180). The electrode tape inspection device (100) may include a supply unit (180) provided to transport the electrode (10) to a photographing position. The supply unit (180) may include a plurality of transport rolls (185).

[0053] Specifically, the electrode tape inspection device (100) of the present invention includes a photographing unit (110). The photographing unit (110) is provided to photograph a tape (20) attached to an electrode (10). The photographing unit (110) may include a CIS sensor. Here, the CIS sensor is called a CMOS image sensor and is a system semiconductor that converts light entering a camera lens into a digital signal. Such a CIS sensor provides advantages such as low power, high speed, high quality images, and cost efficiency.

[0054] FIG. 6 is a perspective view schematically showing some components of an electrode tape inspection device (100) according to one embodiment of the present invention.

[0055] Referring back to FIG. 6 together with FIG. 4, the photographing unit (110) may be a bar-type camera. Such a bar-type camera can be positioned in the width direction of the electrode (10) and then continuously photograph a portion of the width direction of the electrode (10). Such a bar-type camera can continuously produce high-speed, precise images, making it suitable for use in inspecting a continuously moving electrode (10).

[0056] Referring again to FIGS. 3 to 5, the electrode tape inspection device (100) of the present invention includes a dimension measurement light (120). The dimension measurement light (120) may be provided to illuminate the tape (20) to measure the dimensions of the tape (20) and the electrode (10). The dimension measurement light (120) may be positioned adjacent to the photographing unit (110). In addition, the dimension measurement light (120) may illuminate the tape (20) and the electrode (10) so that regular reflection occurs. For example, the dimension measurement light (120) may be provided to illuminate the tape (20) and the electrode (10) at an angle at which regular reflection can occur well. For example, the dimension measurement light (120) may be provided to illuminate the surface of the electrode (10) and the tape (20) at an angle of 40 to 70 degrees. The light for dimensional measurement (120) may be a bar-type light that extends long in one direction.

[0057] In addition, the dimension measurement lighting (120) may be a diffuse lighting that diffuses the light emitted from the light source and then illuminates it. This diffuse lighting can reduce glare on the tape (20) and electrode (10) that are reflected by dispersing the light. The diffuse lighting can more evenly disperse the light across the entire measurement object. Dispersing the light in this way allows for better regular reflection on the surface of the object. For example, the dimension measurement lighting (120) may include a light source and a diffusion plate for diffusing the light emitted from the light source.

[0058] In addition, the electrode tape inspection device (100) of the present invention includes a foreign matter detection light (130). The foreign matter detection light (130) may be provided to illuminate the tape (20) to detect foreign matters present in the tape (20) and the electrode (10). The foreign matter detection light (130) may be positioned adjacent to the photographing unit (110). In addition, the foreign matter detection light (130) may illuminate the tape (20) and the electrode (10) so that boundary reflection occurs. Boundary reflection is a phenomenon in which light is reflected from the surface of an object, and occurs when the angle of the light and the angle of the surface of the object are similar. For example, the foreign matter detection light (130) may be provided to illuminate the tape (20) and the electrode (10) at an angle at which boundary reflection can easily occur. For example, the foreign body detection light (130) may be arranged to illuminate the surface of the electrode (10) and the tape (20) at an angle of more than 0 degrees to 20 degrees.

[0059] In addition, the foreign substance detection light (130) may be a focusing light that illuminates light that is gathered from a light source to a single point. The focusing light can induce boundary reflection on the surface of the target by concentrating the light and shining it intensively on the target. When detecting a foreign substance in this way, the boundary reflection can be used to more accurately detect the boundary of the target. The foreign substance detection light (130) may be a bar-type light that is extended in one direction. For example, the foreign substance detection light (130) may include a light source and a focusing lens that passes light irradiated from the light source.

[0060] Therefore, the electrode tape inspection device (100) of the present invention can quickly and accurately perform dimensional inspection and foreign matter inspection of the electrode (10) and the tape (20) by including a photographing unit (110), a dimension measurement light (120), and a foreign matter detection light (130). In addition, the electrode tape inspection device (100) of the present invention can perform both dimensional inspection and foreign matter inspection of the electrode (10) and the tape (20) through image data photographed by a single photographing unit (110), thereby effectively reducing the cost of the inspection device (100) and the image processing cost.

[0061] Fig. 7 is a diagram conceptually illustrating an image processing process of an electrode tape inspection device (100) according to one embodiment of the present invention.

[0062] Referring to FIG. 7 together with FIGS. 3 to 5, the present invention may further include a control unit (140). The control unit (140) may be configured to divide the original image (150) received from the photographing unit (110) into pixels and group them into odd pixels (151) and even pixels (152). Here, the even pixel (152) refers to a pixel whose Y coordinate in the original image (150) is even, and the odd pixel (151) refers to a pixel whose Y coordinate in the original image (150) is odd. The control unit (140) may be configured to adjust the brightness of each group of grouped odd pixels (151) and group of grouped even pixels (152) differently.

[0063] FIG. 8 is a photograph showing an image generated for dimensional inspection by an electrode tape inspection device (100) according to one embodiment of the present invention.

[0064] Referring back to FIG. 8 together with FIG. 3 to FIG. 7, the control unit (140) can adjust the group of odd pixels (151) of the image to be relatively darker than the group of even pixels (152). The control unit (140) can generate an image (160) for inspection of the tape (20) dimensions based on the odd pixels (151) whose brightness has been adjusted in this way. In addition, the control unit (140) can analyze the image (160) for inspection of the dimensions generated in this way to measure, for example, the width size of the tape (20) and the position of the tape (20) on the electrode (10).

[0065] FIG. 9 is a photograph showing an image generated by an electrode tape inspection device (100) according to one embodiment of the present invention for foreign matter inspection.

[0066] Referring back to FIG. 9 together with FIG. 3 to FIG. 7, the control unit (140) can adjust the group of even pixels (152) of the image to be relatively brighter than the group of odd pixels (151). The control unit (140) can be arranged to generate an image (170) for detecting foreign substances in the tape (20) based on the even pixels (152) whose brightness has been adjusted. In addition, the control unit (140) can analyze the image (170) for detecting foreign substances generated in this way to detect, for example, floating foreign substances, metallic foreign substances, etc., attached to the tape (20) and the electrode (10).

[0067] Meanwhile, referring back to FIG. 3, the control unit (140) can control the operation of the photographing unit (110), the dimension measurement light (120), and the foreign matter detection light (130). For example, the control unit (140) can control the on / off operation of the dimension measurement light (120) and the foreign matter detection light (130), and the brightness of each light. For example, the control unit (140) can control the photographing speed of the photographing unit (110).

[0068] Figure 10 is a flowchart showing steps of a method for inspecting an electrode tape according to one embodiment of the present invention.

[0069] Referring again to FIG. 10 together with FIGS. 3 to 6, the present invention provides a method for inspecting an electrode tape according to an embodiment of the present invention. The method for inspecting an electrode tape of the present invention is a method for continuously inspecting the dimensions of a tape (20) and detecting foreign matter present in the tape (20) using an electrode tape inspection device (100).

[0070] In addition, the electrode tape inspection method includes an electrode supply step (M01). The electrode supply step (M01) is a step in which the supply unit (180) supplies the electrode (10) to which the tape (20) is attached to a measurement position. At this time, the electrode (10) can be transported by the pressure of a plurality of transport rolls of the supply unit (180). Here, the measurement position may be a position where the dimension measurement light (120) and the foreign matter detection light are illuminating the position. In addition, the measurement position may be a position where the photographing unit (110) is photographing.

[0071] In addition, the electrode tape inspection method includes a dimension measurement lighting step (M02). The dimension measurement lighting step (M02) is a step in which a dimension measurement light (120) illuminates the tape (20) to measure the dimensions of the tape (20) and the electrode (10). At this time, the dimension measurement light (120) may be used as a focusing light to induce boundary reflection to occur between the tape (20) and the electrode (10).

[0072] In addition, the electrode tape inspection method includes a foreign matter detection illumination step (M03). The foreign matter detection illumination step (M03) is a step in which the foreign matter detection illumination (130) illuminates the tape (20) to detect foreign matters present on the tape (20) and the electrode (10). At this time, the foreign matter detection illumination (130) may be used as diffuse illumination to induce regular reflection on the tape (20) and the electrode (10).

[0073] Additionally, the electrode tape inspection method includes a photographing step (M04). The photographing step (M04) is a step in which a photographing unit (110) photographs an electrode (10) to which a tape (20) is attached.

[0074] In addition, the electrode tape inspection method further includes a grouping step (M05) in which the control unit (140) divides the image received from the photographing unit (110) into pixels and groups them into odd pixels (151) (odd pixels) and even pixels (152) (even pixels).

[0075] In addition, the electrode tape inspection method may further include a brightness control step (M06). The brightness control step (M06) is a step in which the control unit (140) controls each of the group of odd pixels (151) and the group of even pixels (152) to different brightnesses.

[0076] Additionally, the control unit (140) can adjust the group of odd pixels (151) of the image to be relatively darker than the group of even pixels (152) in the brightness adjustment step (M06).

[0077] In addition, the electrode tape inspection method may further include a step (M07) of generating an image for dimension inspection. The step (M07) of generating an image for dimension inspection may be a step of generating an image (160) for dimension inspection of a tape (20) based on a group of odd pixels (151) whose brightness is adjusted.

[0078] In addition, the electrode tape inspection method may include a dimensional inspection image measurement step (M09) in which the control unit (140) analyzes the generated dimensional inspection image (160) to measure the width of the tape (20) and the position of the tape (20) on the electrode (10).

[0079] Additionally, the control unit (140) can adjust the group of even pixels (152) of the image to be relatively brighter than the group of odd pixels (151) in the brightness adjustment step (M06).

[0080] In addition, the tape inspection method for electrodes may further include a step (M08) of generating an image (170) for foreign substance detection. The step (M08) of generating an image (170) for foreign substance detection may be a step of generating an image (170) for foreign substance detection of a tape (20) based on the even pixels (152) whose brightness is adjusted.

[0081] In addition, the electrode tape inspection method may include a foreign matter detection image analysis step (M10) in which the control unit (140) analyzes the generated foreign matter detection image (170) to detect floating foreign matters, metallic foreign matters, etc., attached to the tape (20) and the electrode (10).

[0082] Therefore, the electrode tape inspection method of the present invention can quickly and accurately perform dimensional inspection and foreign matter inspection of the electrode (10) and the tape (20) through these configuration steps, and can perform both dimensional inspection and foreign matter inspection of the electrode (10) and the tape (20) through image data captured by a single photographing unit (110), thereby effectively reducing the cost of the inspection device (100) and the cost of image processing.

[0083] The preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims.

[0084] According to an electrode tape inspection device and an electrode tape inspection method using the same related to at least one embodiment of the present invention, dimensional inspection and foreign matter inspection of electrodes and tapes can be performed quickly and accurately.

Claims

1. An electrode tape inspection device for performing dimensional inspection of an electrode and a tape attached to the electrode in an electrode taping process and detecting foreign substances present in the electrode and the tape. A photographing unit arranged to photograph the above electrode and the tape attached to the above electrode; A dimension measuring light provided to illuminate the tape to measure the dimensions of the tape and the electrode; and An electrode tape inspection device characterized by including a foreign matter detection light arranged to illuminate the tape to detect foreign matters present in the tape and the electrode.

2. In paragraph 1, The lighting for the above dimensional measurements is: An electrode tape inspection device characterized by illuminating the tape and the electrode so that a positive reflection occurs.

3. In paragraph 1, The lighting for the above dimensional measurements is: An electrode tape inspection device characterized by being a diffused light that diffuses light emitted from a light source and then illuminates it.

4. In paragraph 1, The above foreign body detection light is, An electrode tape inspection device characterized by illuminating the foreign body so that boundary reflection occurs.

5. In paragraph 1, The above foreign body detection light is, An electrode tape inspection device characterized by a focusing light that illuminates by gathering light from a light source to one point.

6. In paragraph 1, The above shooting unit is, It is arranged to photograph the electrode being transported and the tape attached to the electrode, An electrode tape inspection device, characterized in that the above-mentioned photographing unit is a bar-type camera.

7. In paragraph 1, An electrode tape inspection device characterized in that it further includes a control unit configured to divide an image received from the above photographing unit into pixels and group them into odd pixels and even pixels, and to adjust the brightness of each of the grouped odd pixel groups and even pixel groups differently.

8. In paragraph 7, The above control unit, An electrode tape inspection device characterized in that the odd pixel group of the image is adjusted to be relatively darker than the even pixel group, and an image for tape dimension inspection is generated based on the odd pixels whose brightness is adjusted.

9. In paragraph 8, The above control unit, An electrode tape inspection device characterized in that the even pixel group of the image is adjusted to be relatively brighter than the odd pixel group, and an image for detecting tape foreign matter is generated based on the even pixels whose brightness is adjusted.

10. A method for inspecting an electrode tape, which inspects the dimensions of a tape and detects foreign matter present in the tape, using an electrode tape inspection device according to any one of clauses 1 to 9. Electrode supply step in which the supply unit supplies the electrode with the tape attached to the measuring position; A dimension measuring lighting step for illuminating the tape to measure the dimensions of the tape and the electrode; A foreign matter detection lighting step for illuminating the tape to detect foreign matter present in the tape and the electrode; and A method for inspecting an electrode tape, characterized in that the above-mentioned photographing unit includes a photographing step of photographing an electrode to which the tape is attached.

11. In paragraph 10, A grouping step in which the control unit divides the image received from the photographing unit into pixels and groups them into odd pixels and even pixels; and A method for inspecting an electrode tape, characterized in that the control unit further includes a brightness control step in which each of the grouped odd pixel groups and the even pixel groups is controlled to different brightnesses.

12. In paragraph 11, A method for inspecting an electrode tape, characterized in that the control unit adjusts the odd pixel group of the image to be relatively darker than the even pixel group in the brightness adjustment step.

13. In paragraph 12, A method for inspecting an electrode tape, characterized in that it further includes a step of generating an image for dimension inspection, which generates an image for tape dimension inspection based on the above brightness-controlled odd pixel group.

14. In paragraph 11, A method for inspecting an electrode tape, characterized in that the control unit adjusts the even pixel group of the image to be relatively brighter than the odd pixel group in the brightness adjustment step.

15. In paragraph 14, A method for inspecting an electrode tape, characterized by including a step of generating an image for detecting foreign matter in a tape based on the even pixels whose brightness is adjusted.

Images