Electrode vision inspection device and method

Abstract

The present invention provides an electrode vision inspection device (10) comprising: a first light emission unit (100) that includes a first light-emitting unit (110) for emitting a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of an electrode unit (50) and a second light (L2) passing through the outside of the edge of the first surface (S1), and a film (130) arranged on an optical path of at least a part of the second light (L2) so as to change the brightness or color of the passing light; a second light emission unit (200) that includes a second light-emitting unit (210) for emitting a third light (L3) directed toward a second surface (S2) of the other side in the thickness direction of the electrode unit (50); a first image acquisition unit (300), which senses the first light (L1) reflected on the first surface (S1), so as to acquire a first image (G1); a second image acquisition unit (400), which senses the third light (L3) reflected on the second surface (S2) and the second light (L2), so as to acquire a second image (G2); and a detection unit (500) for detecting an edge position or contour of the electrode unit (50) or a predetermined part (P) of the electrode unit (50) on the basis of brightness values or color values of the first image (G1) and the second image (G2).

Description

Electrode vision inspection device and method

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0138744 filed on October 11, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0002] The present invention relates to an electrode vision inspection device and method, and more specifically, to an electrode vision inspection device for inspecting both sides of an electrode part, wherein the detection capability of the corner position or contour of the electrode part (e.g., electrode tab) is improved easily and at low cost with a simple configuration, and over-detection and false detection are prevented.

[0003] The demand for secondary batteries is rapidly increasing due to the growing demand for mobile devices and electric vehicles. In particular, lithium-ion batteries, which possess high energy density and voltage, have been commercialized and are widely used.

[0004] Generally, a secondary battery is completed by manufacturing an electrode (electrode sheet) by coating an electrode active material onto an electrode current collector and drying it, laminating the manufactured electrode together with a separator, and then embedding and sealing it in a battery case along with an electrolyte.

[0005] Meanwhile, the electrode is manufactured by welding an electrode tab to an uncoated portion of an electrode sheet where the electrode active material is not coated, or by forming an electrode tab using a notching device, and then cutting the electrode sheet to a predetermined length.

[0006] To inspect defects in electrodes, a vision inspection device detects the corner position or contour of the electrode area where the electrode tab is located. However, if the electrode is shaded or the electrode tab is bent or damaged, problems arise where the corner position or contour of the electrode area is mis-detected or over-detected. Therefore, a method to solve these problems is required.

[0007] A related prior art document is Korean Registered Patent No. 10-2261757.

[0008] The present invention was devised to solve the aforementioned problems and aims to provide an electrode vision inspection device and method that, in an electrode vision inspection device for inspecting both sides of an electrode part, improves the detection capability of the corner position or contour of the electrode part (e.g., electrode tab) easily and at low cost with a simple configuration, and prevents over-detection and false detection.

[0009] The technical problems of the present invention are not limited to the purposes mentioned above, and other unmentioned purposes and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the purposes and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0010] To solve the above-mentioned problem, the present invention provides an electrode vision inspection device (10) comprising a first light irradiation unit (100), a second light irradiation unit (200), a first image acquisition unit (300), a second image acquisition unit (400), and a detection unit (500).

[0011] The first light irradiation unit (100) may include a first light-emitting unit (110) and a film (130).

[0012] The first light-emitting unit (110) can emit a first light (L1) and a second light (L2).

[0013] The first light (L1) above can be directed toward a first surface (S1) on one side in the thickness direction of the electrode part (50).

[0014] The second light (L2) can pass outside the edge of the first surface (S1).

[0015] The above film (130) can be placed in the light path of at least a portion of the second light (L2).

[0016] The above film (130) can change the brightness or color of light passing through the film (130).

[0017] The second light irradiation unit (200) may include a second light emitting unit (210).

[0018] The above second light-emitting unit (210) can emit a third light (L3).

[0019] The above third light (L3) can be directed toward the second surface (S2) on the other side of the thickness direction of the electrode part (50).

[0020] The first image acquisition unit (300) can acquire a first image (G1) by detecting the first light (L1) reflected on the first surface (S1).

[0021] The second image acquisition unit (400) can acquire a second image (G2) by detecting the third light (L3) reflected on the second surface (S2) and the second light (L2).

[0022] The detection unit (500) can detect the corner position or contour of the electrode unit (50) or a predetermined part (P) of the electrode unit (50) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0023] In one embodiment, the film (130) may be placed in the light path of the second light (L2) passing through the area adjacent to the edge portion of the first surface (S1) of the predetermined portion (P).

[0024] In one embodiment, the film (130) may be placed in the light path of the first light (L1) toward the first surface (S1) of the predetermined portion (P).

[0025] In one embodiment, the second light-emitting unit (210) can emit a fourth light (L4).

[0026] The above fourth light (L4) can pass outside the edge of the above second surface (S2).

[0027] The first image acquisition unit (300) can acquire a first image (G1) by detecting the first light (L1) and the fourth light (L4) reflected on the first surface (S1).

[0028] In one embodiment, the first light irradiation unit (100) may be coaxial illumination.

[0029] The above first light irradiation unit (100) may further include a first mirror (120).

[0030] The first mirror (120) can reflect or pass the first light (L1) and the second light (L2).

[0031] The first light (L1) emitted from the first light-emitting unit (110) may meet or face the first mirror (120) before the first surface (S1).

[0032] The above film (130) can be placed between the first light-emitting part (110) and the first mirror (120).

[0033] In one embodiment, the first light irradiation unit (100) may be coaxial illumination.

[0034] The above first light irradiation unit (100) may further include a first mirror (120).

[0035] The first mirror (120) can reflect or pass the first light (L1) and the second light (L2).

[0036] The first light (L1) emitted from the first light-emitting unit (110) may meet or face the first mirror (120) before the first surface (S1).

[0037] The above film (130) can be placed between the first light-emitting part (110) and the first mirror (120).

[0038] The above film (130) may be positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

[0039] In one embodiment, the direction of the second light (L2) when passing the outer edge of the first surface (S1) may correspond to the direction of the third light (L3) immediately after being reflected by the second surface (S2).

[0040] In addition, to solve the above-mentioned problem, the present invention provides an electrode vision inspection device (10) comprising a first light irradiation unit (100), a second light irradiation unit (200), a first image acquisition unit (300), a second image acquisition unit (400), and a detection unit (500).

[0041] The first light irradiation unit (100) may include a first light-emitting unit (110) and a film (130).

[0042] The first light-emitting unit (110) can emit a first light (L1).

[0043] The first light (L1) above can be directed toward a first surface (S1) on one side in the thickness direction of the electrode part (50).

[0044] The above film (130) can be placed in the light path of at least a portion of the first light (L1).

[0045] The above film (130) can change the brightness or color of light passing through the film (130).

[0046] The above second light irradiation unit (200) may include a second light emitting unit (210).

[0047] The above second light-emitting unit (210) can emit a third light (L3) and a fourth light (L4).

[0048] The above third light (L3) can be directed toward the second surface (S2) on the other side of the thickness direction of the electrode part (50).

[0049] The above fourth light (L4) can pass outside the edge of the above second surface (S2).

[0050] The first image acquisition unit (300) can acquire a first image (G1) by detecting the first light (L1) and the fourth light (L4) reflected on the first surface (S1).

[0051] The second image acquisition unit (400) can acquire a second image (G2) by detecting the third light (L3) reflected on the second surface (S2).

[0052] The detection unit (500) can detect the corner position or contour of the electrode unit (50) or a predetermined part (P) of the electrode unit (50) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0053] In one embodiment, the film (130) may be placed in the light path of the first light (L1) toward the edge portion of the first surface (S1) of the predetermined portion (P).

[0054] In one embodiment, the first light-emitting unit (110) can emit a second light (L2).

[0055] The second light (L2) can pass outside the edge of the first surface (S1).

[0056] The second image acquisition unit (400) can acquire a first image (G1) by detecting the third light (L3) reflected on the second surface (S2) and the second light (L2).

[0057] The above film (130) can be placed in the light path of the second light (L2) passing through the area adjacent to the edge portion of the first surface (S1) of the above predetermined portion (P).

[0058] In one embodiment, the first light irradiation unit (100) may be coaxial illumination.

[0059] The above first light irradiation unit (100) may further include a first mirror (120).

[0060] The first mirror (120) can reflect or pass the first light (L1).

[0061] The first light (L1) emitted from the first light-emitting unit (110) may meet or face the first mirror (120) before the first surface (S1).

[0062] The above film (130) can be placed between the first light-emitting part (110) and the first mirror (120).

[0063] In one embodiment, the film (130) may be positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

[0064] In one embodiment, the direction of the fourth light (L4) when passing the outer edge of the second surface (S2) may correspond to the direction of the first light (L1) immediately after being reflected by the first surface (S1).

[0065] In one embodiment, the first light irradiation unit (100) and the second light irradiation unit (200) may be respectively positioned on one side and the other side in the thickness direction with the electrode unit (50) in between.

[0066] The first light irradiation unit (100) and the second light irradiation unit (200) may be coaxial lights that irradiate light in directions facing each other toward the electrode unit (50).

[0067] In one embodiment, the film (130) may include a base portion (132) and a pattern portion (134).

[0068] The above pattern part (134) is coupled to the base part (132) and can form a predetermined pattern (T).

[0069] When the same light passes through the base part (132) and the pattern part (134) individually, the brightness or color of the light may differ from each other.

[0070] The detection unit (500) can detect the corner position or contour of the electrode unit (50) or a predetermined part (P) using information regarding the pattern (T).

[0071] In one embodiment, the pattern (T) may form a plurality of slits or line shapes arranged in parallel.

[0072] In one embodiment, the film (130) may be placed in a light path of light emitted from the first light-emitting part (110) toward the first surface (S1) of a predetermined part (P) of the electrode part (50) or toward an area adjacent to the first surface (S1) of the predetermined part (P).

[0073] The extension direction of the plurality of slits or line shapes of the above pattern (T) may intersect with the extension direction, length direction, or protrusion direction of the above predetermined part (P).

[0074] In addition, to solve the above-mentioned problem, the present invention provides an electrode vision inspection method (S700) comprising a film placement process (S710); a light irradiation process (S720); an image acquisition process (S730); and a detection process (S740).

[0075] In the above film placement process (S710), the film (130) can be placed in the light path of light (L2 or L1) emitted from the first light-emitting part (110) and directed toward an area adjacent to the first surface (S1) of the predetermined part (P) of the electrode part (50) or toward the first surface (S1) of the predetermined part (P).

[0076] In the above light irradiation process (S720), the first light irradiation unit (100) and the second light irradiation unit (200) can irradiate light onto both sides of the electrode unit (50).

[0077] In the above image acquisition process (S730), the first image acquisition unit (300) and the second image acquisition unit (400) can acquire the first image (G1) and the second image (G2).

[0078] In the above detection process (S740), the detection unit (500) can detect the corner position or contour of the predetermined part (P) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0079] According to embodiments of the present invention, an electrode vision inspection device (10) comprises: a first light irradiation unit (100) comprising a first light emitting unit (110) that emits a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of an electrode part (50) and a second light (L2) passing through the outer edge of the first surface (S1), and a film (130) that is placed in at least a portion of the light path of the second light (L2) and changes the brightness or color of the light passing through; a second light irradiation unit (200) comprising a second light emitting unit (210) that emits a third light (L3) directed toward a second surface (S2) on the other side in the thickness direction of the electrode part (50); and a first image acquisition unit (300) that detects the first light (L1) reflected from the first surface (S1) and acquires a first image (G1). It may include a second image acquisition unit (400) that detects the third light (L3) reflected on the second surface (S2) and the second light (L2) to acquire a second image (G2); and a detection unit (500) that detects the corner position or contour of the electrode part (50) or a predetermined part (P) of the electrode part (50) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0080] Accordingly, in an electrode vision inspection device (10) that inspects both sides of an electrode part (50), the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved easily and at low cost with a simple configuration, and over-detection and false detection can be prevented.

[0081] Specifically, the detection unit (500) can detect the corner position or contour of both sides of the electrode unit (50) using the first and second images (G1, G2). At this time, since the brightness or color of the second light (L2) changes due to the film (130), the difference in brightness or color between the foreground (electrode unit (50)) and the background in the second image (G2) may increase. Additionally, since the second light (L2) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the second light (L2) is improved, so the uniformity of brightness or color of the background in the second image (G2) may be improved. Accordingly, the detection capability of the corner position or contour of the electrode unit (50) (e.g., electrode tab (56)) in the second image (G2) is improved, and over-detection and false detection can be prevented.

[0082] According to embodiments of the present invention, the film (130) may be placed in the light path of the second light (L2) passing through the edge portion of the first surface (S1) of the predetermined portion (P) and the area adjacent to it.

[0083] Accordingly, the foreground (a specific part (P)) and the background can be clearly distinguished in the second image (G2).

[0084] According to embodiments of the present invention, the film (130) may be placed in the light path of the first light (L1) toward the first surface (S1) of the predetermined portion (P).

[0085] Accordingly, even if the position or size of a specific part (P) of the electrode part (50) changes, the film (130) can be reliably placed in the light path of the second light (L2) passing through the area adjacent to the edge of the specific part (P). Accordingly, the foreground (specific part (P)) and the background can be clearly distinguished in the second image (G2).

[0086] Additionally, since the brightness or color of the first light (L1) directed toward a specific area (P) is changed by the film (130), the difference in brightness or color between the specific area (P) and its background in the first image (G1) may increase. Also, since the first light (L1) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the first light (L1) is improved, so the uniformity of brightness or color of the specific area (P) in the first image (G1) may be improved. Accordingly, the detection capability of the corner position or contour of the specific area (P) in the first image (G1) is improved, and over-detection and false detection may be prevented.

[0087] According to embodiments of the present invention, the second light-emitting unit (210) can emit a fourth light (L4) passing along the outer edge of the second surface (S2). The first image acquisition unit (300) can acquire a first image (G1) by detecting the first light (L1) reflected on the first surface (S1) and the fourth light (L4).

[0088] Accordingly, the difference in brightness or color between a specific part (P) and its background in the first image (G1) may be increased. Accordingly, the detection capability of the corner position or contour of the specific part (P) in the first image (G1) may be improved, and over-detection and false detection may be prevented.

[0089] According to embodiments of the present invention, the first light irradiation unit (100) may further include a first mirror (120) that reflects or passes the first light (L1) and the second light (L2), which is coaxial illumination. The first light (L1) emitted from the first light emitting unit (110) may meet or face the first mirror (120) before the first surface (S1). The film (130) may be placed between the first light emitting unit (110) and the first mirror (120).

[0090] Accordingly, since a first image (G1) of the electrode part (50) with the shadow removed can be obtained, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved. In addition, the film (130) can be placed easily and stably.

[0091] According to embodiments of the present invention, the first light irradiation unit (100) may further include a first mirror (120) that reflects or passes the first light (L1) and the second light (L2), which is coaxial illumination. The first light (L1) emitted from the first light-emitting unit (110) may meet or face the first mirror (120) before the first surface (S1). The film (130) may be disposed between the first light-emitting unit (110) and the first mirror (120), and may be disposed at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

[0092] Accordingly, since the fourth light (L4) incident on the first image acquisition unit (300) cannot pass through the film (130), the difference in brightness or color between a specific part (P) and its background in the first image (G1) may increase.

[0093] According to embodiments of the present invention, the direction of the second light (L2) when passing the outer edge of the first surface (S1) may correspond to the direction of the third light (L3) immediately after being reflected by the second surface (S2).

[0094] Accordingly, in the second image (G2), the foreground (a specific part (P), e.g., the electrode tab (56)) and the background can be clearly distinguished.

[0095] According to embodiments of the present invention, an electrode vision inspection device (10) comprises: a first light irradiation unit (100) comprising a first light emitting unit (110) that emits a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of an electrode part (50), and a film (130) that is placed in at least a portion of the light path of the first light (L1) and changes the brightness or color of the light passing through; a second light irradiation unit (200) comprising a second light emitting unit (210) that emits a third light (L3) directed toward a second surface (S2) on the other side in the thickness direction of the electrode part (50) and a fourth light (L4) passing through the outer edge of the second surface (S2); and a first image acquisition unit (300) that detects the first light (L1) reflected on the first surface (S1) and the fourth light (L4) to acquire a first image (G1). It may include a second image acquisition unit (400) that acquires a second image (G2) by detecting the third light (L3) reflected on the second surface (S2); and a detection unit (500) that detects the corner position or contour of the electrode part (50) or a predetermined part (P) of the electrode part (50) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0096] Accordingly, in an electrode vision inspection device (10) that inspects both sides of an electrode part (50), the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved easily and at low cost with a simple configuration, and over-detection and false detection can be prevented.

[0097] Specifically, the detection unit (500) can detect the corner position or contour of both sides of the electrode unit (50) using the first and second images (G1, G2). At this time, since the brightness or color of the first light (L1) changes due to the film (130), the difference in brightness or color between the foreground (electrode unit (50)) and the background in the first image (G1) may increase. Additionally, since the first light (L1) is refracted, scattered, and / or diffused due to the film (130), the uniformity of light of the first light (L1) is improved, so the uniformity of brightness or color of the foreground in the first image (G1) may be improved. Accordingly, the detection capability of the corner position or contour of the electrode unit (50) (e.g., electrode tab (56)) in the first image (G1) is improved, and over-detection and false detection can be prevented.

[0098] According to embodiments of the present invention, the film (130) may be placed in the light path of the first light (L1) toward the edge portion of the first surface (S1) of the predetermined portion (P).

[0099] Accordingly, the foreground (a specific part (P)) and the background can be clearly distinguished in the first image (G1).

[0100] According to embodiments of the present invention, the first light-emitting unit (110) may emit a second light (L2) passing along the outer edge of the first surface (S1). The second image acquisition unit (400) may acquire a first image (G1) by detecting the third light (L3) reflected from the second surface (S2) and the second light (L2). The film (130) may be placed in the light path of the second light (L2) passing along the area adjacent to the edge of the first surface (S1) of the predetermined portion (P).

[0101] Accordingly, even if the position or size of a specific part (P) of the electrode part (50) changes, the film (130) can be reliably placed in the light path of the first light (L1) directed toward the edge of the specific part (P). Accordingly, the foreground (specific part (P)) and the background can be clearly distinguished in the first image (G1).

[0102] Additionally, since the brightness or color of the second light (L2) directed toward a specific area (P) is changed by the film (130), the difference in brightness or color between the specific area (P) and its background in the second image (G2) may increase. Also, since the second light (L2) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the second light (L2) is improved, so the uniformity of brightness or color of the specific area (P) in the second image (G2) may be improved. Accordingly, the detection capability of the corner position or contour of the specific area (P) in the second image (G2) is improved, and over-detection and false detection may be prevented.

[0103] According to embodiments of the present invention, the first light irradiation unit (100) may further include a first mirror (120) that reflects or passes the first light (L1) and is coaxial illumination. The first light (L1) emitted from the first light emitting unit (110) may meet or face the first mirror (120) before the first surface (S1). The film (130) may be placed between the first light emitting unit (110) and the first mirror (120).

[0104] Accordingly, since a first image (G1) of the electrode part (50) with the shadow removed can be obtained, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved. In addition, the film (130) can be placed easily and stably.

[0105] According to embodiments of the present invention, the film (130) may be positioned at a predetermined distance from the optical path of the fourth light (L4) incident on the first image acquisition unit (300).

[0106] Accordingly, since the fourth light (L4) incident on the first image acquisition unit (300) cannot pass through the film (130), the difference in brightness or color between a specific part (P) and its background in the first image (G1) may increase.

[0107] According to embodiments of the present invention, the direction of the fourth light (L4) when passing the outer edge of the second surface (S2) may correspond to the direction of the first light (L1) immediately after being reflected by the first surface (S1).

[0108] Accordingly, in the first image (G1), the foreground (a specific part (P), e.g., electrode tab (56)) and the background can be clearly distinguished.

[0109] According to embodiments of the present invention, the first light irradiation unit (100) and the second light irradiation unit (200) may be coaxial illumination units that are respectively positioned on one side and the other side in the thickness direction with the electrode unit (50) in between and irradiate light in a direction facing each other toward the electrode unit (50).

[0110] Accordingly, the direction of the second light (L2) (or fourth light (L4)) passing the outer edge of the first surface (S1) (or second surface (S2)) and the direction of the third light (L3) (or first light (L1)) immediately after being reflected from the second surface (S2) (or first surface (S1)) can be implemented to correspond to each other with a simple configuration and low cost.

[0111] In addition, since images of both sides of the electrode part (50) with the shadow removed can be obtained, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved.

[0112] According to embodiments of the present invention, the film (130) may include a base portion (132) and a pattern portion (134) coupled to the base portion (132) and forming a predetermined pattern (T). When the same light passes through the base portion (132) and the pattern portion (134) individually, the brightness or color of the light may differ from one another. The detection portion (500) may detect the corner position or contour of the electrode portion (50) or a predetermined portion (P) using information regarding the pattern (T).

[0113] Accordingly, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the corner position or contour of the predetermined part (P) is bent or damaged, the corner position or contour of the predetermined part (P) can be effectively detected.

[0114] According to embodiments of the present invention, the pattern (T) may form a plurality of slits or line shapes arranged in parallel.

[0115] Accordingly, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the corner position or contour of the predetermined part (P) is bent or damaged, the corner position or contour of the predetermined part (P) can be effectively detected.

[0116] According to embodiments of the present invention, the film (130) may be placed in a light path of light emitted from the first light-emitting part (110) toward the first surface (S1) of a predetermined part (P) of the electrode part (50) or toward an area adjacent to the first surface (S1) of the predetermined part (P). The extension direction of the plurality of slits or line shapes of the pattern (T) may intersect with the extension direction, length direction, or protrusion direction of the predetermined part (P).

[0117] Accordingly, the detection capability of the corner position or contour of a specific part (P) of the electrode part (50) (e.g., the protruding end of the electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the specific part (P) is bent or damaged, the corner position or contour of the specific part (P) can be effectively detected.

[0118] According to embodiments of the present invention, an electrode vision inspection method (S700) comprises: a film placement process (S710) in which the film (130) is placed in the light path of light (L2 or L1) emitted from the first light-emitting unit (110) and directed toward an area adjacent to the first surface (S1) of the predetermined portion (P) of the electrode unit (50) or toward the first surface (S1) of the predetermined portion (P); a light irradiation process (S720) in which the first light irradiation unit (100) and the second light irradiation unit (200) irradiate light onto both sides of the electrode unit (50); and an image acquisition process (S730) in which the first image acquisition unit (300) and the second image acquisition unit (400) acquire the first image (G1) and the second image (G2). And the detection unit (500) may include a detection process (S740) in which it detects the corner position or contour of the predetermined part (P) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0119] Accordingly, both sides of the electrode part (50) can be inspected, and at the same time, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved and over-detection and false detection can be prevented at low cost with a simple configuration.

[0120] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below.

[0121] FIG. 1 is a schematic diagram showing an electrode vision inspection device according to one embodiment of the present invention.

[0122] FIG. 2 is a perspective view schematically showing a part of the configuration of the electrode vision inspection device of FIG. 1.

[0123] FIG. 3 is a schematic diagram showing the second image acquired by the second image acquisition unit of FIG. 1 and FIG. 2.

[0124] FIG. 4 is a schematic diagram showing the first image acquired by the first image acquisition unit of FIG. 1 and FIG. 2.

[0125] FIG. 5 is a flowchart of an electrode vision inspection method according to one embodiment of the present invention.

[0126] [Explanation of the symbol]

[0127] 10: Electrode vision inspection device

[0128] 50: Electrode part

[0129] 52: Electrode current collector 54: Active material layer

[0130] 56: Electrode tab P: Specified part

[0131] S1: Page 1 S2: Page 2

[0132] 100: 1st Light Survey Department

[0133] 110: First light-emitting part 120: First mirror

[0134] L1: First Light L2: Second Light

[0135] 130: Film

[0136] 132: Base section 134: Pattern section

[0137] T: Pattern

[0138] 200: 2nd Light Investigation Department

[0139] 210: Second light-emitting part 220: Second mirror

[0140] L3: Third Light L4: Fourth Light

[0141] 300: 1st image acquisition unit G1: 1st image

[0142] 400: Second image acquisition unit G2: Second image

[0143] 500: Detector

[0144] The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0145] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0146] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0147] In the following, the statement that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component.

[0148] In addition, where it is stated that one component is "connected," "combined," or "connected" to another component, it should be understood that while the components may be directly connected or connected to each other, another component may be "interposed" between each component, or each component may be "connected," "combined," or "connected" through another component.

[0149] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0150] FIG. 1 is a schematic diagram showing an electrode vision inspection device according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a part of the configuration of the electrode vision inspection device of FIG. 1. FIG. 3 is a schematic diagram showing a second image acquired by the second image acquisition unit of FIG. 1 and FIG. 2. FIG. 4 is a schematic diagram showing a first image acquired by the first image acquisition unit of FIG. 1 and FIG. 2. FIG. 5 is a flowchart of an electrode vision inspection method according to an embodiment of the present invention.

[0151] [First embodiment of electrode vision inspection device]

[0152] Referring to FIGS. 1 and 2, the electrode vision inspection device (10) according to the first embodiment may include a first light irradiation unit (100), a second light irradiation unit (200), a first image acquisition unit (300), a second image acquisition unit (400), and a detection unit (500).

[0153] The electrode vision inspection device (10) can detect the corner position or contour of the electrode part (50) or a predetermined part (P) of the electrode part (50) or the electrode part (50) using the first and second images (G1, G2, Fig. 3, Fig. 4) acquired from the first and second image acquisition units (300, 400), and inspect the dimensions or position, etc. of the electrode part (50) or the electrode part (50).

[0154] Here, the electrode portion (50) may include an electrode current collector (52) and an electrode tab (56). The electrode portion (50) may further include an active material layer (54). The electrode portion (50) may be transported in the longitudinal direction (e.g., downward).

[0155] The active material layer (54) can be applied to the electrode current collector (52). The part of the electrode current collector (52) where the active material layer (54) is applied is the retained part, and the part of the electrode current collector (52) where the active material layer (54) is not applied is the untreated part.

[0156] The electrode tab (56) can be coupled (e.g., welded) to the electrode current collector (52). The electrode tab (56) can be coupled to the non-coupling portion. Specifically, the electrode tab (56) may include an overlapping portion and a protrusion portion. The overlapping portion may be in contact with or face the electrode current collector (52). The overlapping portion may be coupled (e.g., welded) to the electrode current collector (52). The protrusion portion may be positioned on one side of the overlapping portion and may protrude toward said side from the electrode current collector (52).

[0157] Also, here, a predetermined portion (P) may be a protruding end of the electrode tab (56).

[0158] [1st Mineral Survey Department]

[0159] The first light irradiation unit (100) may include a first light-emitting unit (110) and a film (130). The first light irradiation unit (100) may be coaxial illumination. Accordingly, the first light irradiation unit (100) may further include a first mirror (120).

[0160] The first light-emitting unit (110) can emit a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of the electrode unit (50). The first light-emitting unit (110) can emit a second light (L2) passing along the outer edge of the first surface (S1). The second light (L2) can be directed from one side in the thickness direction of the electrode unit (50) toward the other side.

[0161] The direction of the second light (L2) when passing the outer edge of the first surface (S1) may correspond to the direction of the third light (L3) immediately after being reflected by the second surface (S2). Accordingly, the foreground (a specific part (P), e.g., the electrode tab (56)) and the background can be clearly distinguished in the second image (G2) (Fig. 3).

[0162] The first mirror (120) can reflect or pass the first light (L1) and the second light (L2). The first mirror (120) may be a half mirror that reflects some of the light and passes other parts of the light. Through the first mirror (120), the first light irradiation unit (100) can irradiate light onto the first surface (S1) in the direction in which the first image acquisition unit (300) faces the first surface (S1) (e.g., a direction perpendicular to the first surface (S1)).

[0163] Accordingly, since a first image (G1) of the electrode part (50) with the shadow removed can be obtained, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved.

[0164] The first light (L1) emitted from the first light-emitting part (110) may meet or face the first mirror (120) before the first surface (S1).

[0165] The film (130) can change the brightness or color of the light passing through the film (130).

[0166] The film (130) can be placed in the light path of at least part of the second light (L2).

[0167] Specifically, the film (130) can be placed in the light path of the second light (L2) passing through the edge portion of the first surface (S1) of the predetermined portion (P) and the area adjacent to it.

[0168] Accordingly, the foreground (a specific part (P)) and the background can be clearly distinguished in the second image (G2) (Fig. 3).

[0169] At this time, the film (130) may be placed in the light path of the first light (L1) facing the first surface (S1) of a predetermined part (P) (Figs. 2, 4).

[0170] Accordingly, even if the position or size of a predetermined part (P) of the electrode part (50) changes, the film (130) can be reliably placed in the light path of the second light (L2) passing through the area adjacent to the edge of the predetermined part (P). Accordingly, the foreground (predetermined part (P)) and the background can be clearly distinguished in the second image (G2) (Fig. 3).

[0171] Additionally, since the brightness or color of the first light (L1) directed toward a specific area (P) is changed by the film (130), the difference in brightness or color between the specific area (P) and its background in the first image (G1) may increase (Fig. 4). Furthermore, since the first light (L1) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the first light (L1) is improved, so the uniformity of brightness or color of the specific area (P) in the first image (G1) may be improved. Accordingly, the detection capability of the corner position or contour of the specific area (P) in the first image (G1) is improved, and over-detection and false detection may be prevented.

[0172] The film (130) may be placed between the first light-emitting part (110) and the first mirror (120). For example, the film (130) may be placed on the front of the first light-emitting part (110).

[0173] Accordingly, the film (130) can be placed easily and stably.

[0174] The film (130) may be positioned between the first light-emitting unit (110) and the first mirror (120), and may be positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

[0175] Accordingly, since the fourth light (L4) incident on the first image acquisition unit (300) cannot pass through the film (130), the difference in brightness or color between a specific part (P) and its background in the first image (G1) may increase.

[0176] The film (130) may include a base portion (132) and a pattern portion (134). The pattern portion (134) may be coupled to the base portion (132). The pattern portion (134) may form a predetermined pattern (T). When the same light passes through the base portion (132) and the pattern portion (134) individually, the brightness or color of the light may differ from each other (Figs. 3, 4).

[0177] The pattern (T) can form a plurality of slits or line shapes arranged in parallel (Figs. 3 and 4). Accordingly, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the corner position or contour of the predetermined part (P) is bent or damaged, the corner position or contour of the predetermined part (P) can be effectively detected.

[0178] When the film (130) is placed in the light path of light (i.e., first light or second light) that is emitted from the first light-emitting part (110) and directed toward the first surface (S1) of a predetermined part (P) of the electrode part (50) or toward an area adjacent to the first surface (S1) of the predetermined part (P), the extension direction of the plurality of slits or line shapes of the pattern (T) may intersect (e.g., orthogonally) with the extension direction, length direction, or protrusion direction of the predetermined part (P) (Figs. 3, 4).

[0179] Accordingly, the detection capability of the corner position or contour of a specific part (P) of the electrode part (50) (e.g., the protruding end of the electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the specific part (P) is bent or damaged, the corner position or contour of the specific part (P) can be effectively detected.

[0180] [2nd Light Investigation Department]

[0181] The second light irradiation unit (200) may include a second light-emitting unit (210). The second light irradiation unit (200) may be coaxial illumination. Accordingly, the second light irradiation unit (200) may include a second mirror (220).

[0182] The second light-emitting unit (210) can emit a third light (L3) directed toward the second surface (S2) on the other side in the thickness direction of the electrode unit (50). The second light-emitting unit (210) can emit a fourth light (L4) passing along the outer edge of the second surface (S2). The fourth light (L4) can be directed toward one side from the other side in the thickness direction of the electrode unit (50).

[0183] The light intensity of the second light-emitting part (210) can correspond to the light intensity of the first light-emitting part (110).

[0184] The second mirror (220) can reflect or pass the third light (L3). The second mirror (220) can reflect or pass the fourth light (L4). The second mirror (220) may be a half mirror that reflects some light and passes other light. Through the second mirror (220), the second light irradiation unit (200) can irradiate light onto the second surface (S2) in the direction in which the second image acquisition unit (400) faces the second surface (S2) (e.g., a direction perpendicular to the second surface (S2)).

[0185] Meanwhile, the first light irradiation unit (100) and the second light irradiation unit (200) may be respectively positioned on one side and the other side in the thickness direction with the electrode unit (50) in between. The first light irradiation unit (100) and the second light irradiation unit (200) may be coaxial illumination that irradiates light in directions facing each other toward the electrode unit (50).

[0186] Accordingly, the direction of the second light (L2) (or fourth light (L4)) passing the outer edge of the first surface (S1) (or second surface (S2)) and the direction of the third light (L3) (or first light (L1)) immediately after being reflected from the second surface (S2) (or first surface (S1)) can be implemented to correspond to each other with a simple configuration and low cost.

[0187] In addition, since images of both sides of the electrode part (50) with the shadow removed can be obtained, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved.

[0188] [Image Acquisition Section]

[0189] First, we examine the second image acquisition unit (400).

[0190] The second image acquisition unit (400) can acquire a second image (G2) by detecting the third light (L3) and the second light (L2) reflected on the second surface (S2).

[0191] Specifically, the second image acquisition unit (400) can acquire a second image (G2) by detecting a third light (L3) that is reflected from the second surface (S2) and incident as front light on the second image acquisition unit (400), and a second light (L2) that passes through the film (130) and is incident as back light on the second image acquisition unit (400). At this time, the brightness of the back light may be lower than the brightness of the front light due to the film (130).

[0192] Accordingly, in an electrode vision inspection device (10) that inspects both sides of an electrode part (50), the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved easily and at low cost with a simple configuration, and over-detection and false detection can be prevented.

[0193] Specifically, the detection unit (500) can detect the corner position or contour of both sides of the electrode unit (50) using the first and second images (G1, G2). At this time, since the brightness or color of the second light (L2) changes due to the film (130), the difference in brightness or color between the foreground (electrode unit (50)) and the background in the second image (G2) may increase. Additionally, since the second light (L2) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the second light (L2) is improved, so the uniformity of brightness or color of the background in the second image (G2) may be improved. Accordingly, the detection capability of the corner position or contour of the electrode unit (50) (e.g., electrode tab (56)) in the second image (G2) is improved, and over-detection and false detection can be prevented.

[0194] The first image acquisition unit (300) can acquire the first image (G1) by detecting the first light (L1) reflected on the first surface (S1).

[0195] The first image acquisition unit (300) can acquire a first image (G1) by detecting a first light (L1) reflected on a first surface (S1) and a fourth light (L4). At this time, as described above, the film (130) is positioned in the light path of the first light (L1) directed toward the first surface (S1) of a predetermined portion (P), and the second light-emitting unit (210) can emit a fourth light (L4) passing along the outer edge of the second surface (S2).

[0196] Accordingly, the difference in brightness or color between a specific part (P) and its background in the first image (G1) may be increased. Accordingly, the detection capability of the corner position or contour of the specific part (P) in the first image (G1) may be improved, and over-detection and false detection may be prevented.

[0197] [Detection unit]

[0198] The detection unit (500) can detect the corner position or contour of the electrode unit (50) or a predetermined part (P) of the electrode unit (50) based on the brightness value or color value (e.g., a plurality of pixels) of the first image (G1) and the second image (G2).

[0199] The detection unit (500) can detect the corner position or contour of the electrode unit (50) or a predetermined part (P) using information regarding the pattern (T) of the aforementioned film (130) (e.g., the shape, width, spacing, etc. of the pattern (T)).

[0200] For example, in the second image (G2), the area where the pattern (T) is formed is determined as the background, and the area surrounded by the pattern (T) is determined as a specific area (P), i.e., the foreground, so that the corner position or contour of the specific area (P) can be detected. At this time, even if the brightness value or color value of the specific area (P) is abnormal because the specific area (P) is bent or damaged, the correct corner position or contour of the specific area (P) can be detected using the pattern (T).

[0201] Accordingly, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) is improved, and over-detection and false detection can be prevented. In particular, even if the corner position or contour of the predetermined part (P) is bent or damaged, the corner position or contour of the predetermined part (P) can be effectively detected.

[0202] [Second Embodiment of Electrode Vision Inspection Device]

[0203] The electrode vision inspection device (10) according to the second embodiment may include a first light irradiation unit (100), a second light irradiation unit (200), a first image acquisition unit (300), a second image acquisition unit (400), and a detection unit (500), similar to the electrode vision inspection device (10) according to the first embodiment described above. Below, we will examine the differences from the electrode vision inspection device (10) according to the first embodiment.

[0204] [Gwangjosabu]

[0205] The first light irradiation unit (100) may include a first light-emitting unit (110) and a film (130). The first light irradiation unit (100) may further include a first mirror (120).

[0206] The first light-emitting unit (110) can emit a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of the electrode unit (50). The first light-emitting unit (110) can emit a second light (L2) passing along the outer edge of the first surface (S1).

[0207] The first mirror (120) can reflect or pass the first light (L1).

[0208] The film (130) can be placed in the light path of at least part of the first light (L1).

[0209] The film (130) can be placed in the light path of the first light (L1) toward the edge of the first surface (S1) of the predetermined portion (P). Accordingly, the foreground (predetermined portion (P)) and the background can be clearly distinguished in the first image (G1).

[0210] The film (130) can be placed in the light path of a second light (L2) passing through an area adjacent to the edge portion of the first surface (S1) of a predetermined portion (P) (Figs. 2, 3).

[0211] Accordingly, even if the position or size of a predetermined part (P) of the electrode part (50) changes, the film (130) can be reliably placed in the light path of the first light (L1) directed toward the edge of the predetermined part (P). Accordingly, the foreground (predetermined part (P)) and the background can be clearly distinguished in the first image (G1) (Fig. 4).

[0212] Additionally, since the brightness or color of the second light (L2) directed toward a specific area (P) is changed by the film (130), the difference in brightness or color between the specific area (P) and its background in the second image (G2) may increase (Fig. 3). Furthermore, since the second light (L2) is refracted, scattered, and / or diffused by the film (130), the uniformity of light of the second light (L2) is improved, so the uniformity of brightness or color of the specific area (P) in the second image (G2) may be improved. Accordingly, the detection capability of the corner position or contour of the specific area (P) in the second image (G2) is improved, and over-detection and false detection may be prevented.

[0213] The film (130) can be placed between the first light-emitting part (110) and the first mirror (120).

[0214] The film (130) can be positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

[0215] The second light irradiation unit (200) may include a second light emitting unit (210). The second light irradiation unit (200) may further include a second mirror (220).

[0216] The second light-emitting part (210) can emit a third light (L3) directed toward the second surface (S2) on the other side of the thickness direction of the electrode part (50) and a fourth light (L4) passing through the outer edge of the second surface (S2).

[0217] The direction of the fourth light (L4) when passing the outer edge of the second surface (S2) may correspond to the direction of the first light (L1) immediately after being reflected by the first surface (S1).

[0218] Accordingly, in the first image (G1), the foreground (a specific part (P), e.g., electrode tab (56)) and the background can be clearly distinguished.

[0219] The second mirror (220) can reflect or pass the third light (L3) and the fourth light (L4).

[0220] [Image Acquisition Section]

[0221] The first image acquisition unit (300) can acquire a first image (G1) by detecting a first light (L1) and a fourth light (L4) reflected on a first surface (S1).

[0222] Specifically, the first image acquisition unit (300) can acquire a first image (G2) by detecting a first light (L1) that passes through the film (130), is reflected on the first surface (S1), and is incident as a front light on the first image acquisition unit (300), and a fourth light (L4) that is incident as a back light on the first image acquisition unit (300). At this time, the brightness of the front light may be lower than the brightness of the back light due to the film (130).

[0223] Accordingly, in an electrode vision inspection device (10) that inspects both sides of an electrode part (50), the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved easily and at low cost with a simple configuration, and over-detection and false detection can be prevented.

[0224] Specifically, the detection unit (500) can detect the corner position or contour of both sides of the electrode unit (50) using the first and second images (G1, G2). At this time, since the brightness or color of the first light (L1) changes due to the film (130), the difference in brightness or color between the foreground (electrode unit (50)) and the background in the first image (G1) may increase. Additionally, since the first light (L1) is refracted, scattered, and / or diffused due to the film (130), the uniformity of light of the first light (L1) is improved, so the uniformity of brightness or color of the foreground in the first image (G1) may be improved. Accordingly, the detection capability of the corner position or contour of the electrode unit (50) (e.g., electrode tab (56)) in the first image (G1) is improved, and over-detection and false detection can be prevented.

[0225] The second image acquisition unit (400) can acquire the second image (G2) by detecting the third light (L3) reflected on the second surface (S2).

[0226] The second image acquisition unit (400) can acquire the first image (G1) by detecting the third light (L3) and the second light (L2) reflected on the second surface (S2).

[0227] Meanwhile, matters not mentioned in relation to the electrode vision inspection device (10) according to the second embodiment can be inferred from the electrode vision inspection device (10) according to the first embodiment described above.

[0228] [Electrode Vision Inspection Method]

[0229] Referring to FIG. 5, an electrode vision inspection method (S700) according to one embodiment may include a film placement process (S710), a light irradiation process (S720), an image acquisition process (S730), and a detection process (S740).

[0230] In the film placement process (S710), the film (130) can be placed in the light path of light (L2 or L1) that is emitted from the first light-emitting part (110) and is directed toward an area adjacent to the first surface (S1) of a predetermined part (P) of the electrode part (50) or toward the first surface (S1) of the predetermined part (P).

[0231] In the light irradiation process (S720), the first light irradiation unit (100) and the second light irradiation unit (200) can irradiate light onto both sides of the electrode unit (50).

[0232] The image acquisition process (S730) can be performed after the light irradiation process (S720).

[0233] In the image acquisition process (S730), the first image acquisition unit (300) and the second image acquisition unit (400) can acquire the first image (G1) and the second image (G2).

[0234] In the detection process (S740), the detection unit (500) can detect the corner position or contour of a predetermined part (P) based on the brightness value or color value of the first image (G1) and the second image (G2).

[0235] Accordingly, both sides of the electrode part (50) can be inspected, and at the same time, the detection capability of the corner position or contour of the electrode part (50) (e.g., electrode tab (56)) can be improved and over-detection and false detection can be prevented at low cost with a simple configuration.

[0236] The embodiments described above should be understood as exemplary in all respects and not limiting, and the scope of the invention will be defined by the claims set forth below rather than by the detailed description above. Furthermore, the meaning and scope of the claims set forth below, as well as all modifications and variations derived from equivalents thereof, should be interpreted as being included within the scope of the invention.

[0237] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration according to the present invention were not explicitly described while describing the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized.

Claims

1. A first light emitting unit (110) that emits a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of an electrode unit (50) and a second light (L2) passing along the outer edge of the first surface (S1), and a first light irradiation unit (100) comprising a film (130) disposed in the light path of at least a portion of the second light (L2) and changing the brightness or color of the passing light; A second light irradiation unit (200) including a second light emitting unit (210) that emits a third light (L3) directed toward a second surface (S2) on the other side of the thickness direction of the electrode unit (50); A first image acquisition unit (300) that detects the first light (L1) reflected on the first surface (S1) and acquires a first image (G1); A second image acquisition unit (400) that detects the third light (L3) reflected on the second surface (S2) and the second light (L2) to acquire a second image (G2); and A detection unit (500) that detects the corner position or contour of the electrode part (50) or a predetermined part (P) of the electrode part (50) based on the brightness value or color value of the first image (G1) and the second image (G2), Electrode vision inspection device.

2. In Claim 1, The above film (130) is an electrode vision inspection device that is positioned in the light path of the second light (L2) passing through the area adjacent to the edge portion of the first surface (S1) of the above predetermined portion (P).

3. In Claim 2, The above film (130) is an electrode vision inspection device that is positioned in the light path of the first light (L1) toward the first surface (S1) of the above predetermined portion (P).

4. In any one of claims 1 to 3, The second light-emitting part (210) emits a fourth light (L4) passing along the outer edge of the second surface (S2), and The above first image acquisition unit (300) is an electrode vision inspection device that acquires a first image (G1) by detecting the first light (L1) reflected on the first surface (S1) and the fourth light (L4).

5. In any one of claims 1 to 4, The above first light irradiation unit (100) is coaxial illumination and further includes a first mirror (120) that reflects or passes the first light (L1) and the second light (L2). The first light (L1) emitted from the first light-emitting unit (110) meets or faces the first mirror (120) before the first surface (S1), and The above film (130) is an electrode vision inspection device disposed between the first light-emitting part (110) and the first mirror (120).

6. In Claim 4, The above first light irradiation unit (100) is coaxial illumination and further includes a first mirror (120) that reflects or passes the first light (L1) and the second light (L2). The first light (L1) emitted from the first light-emitting unit (110) meets or faces the first mirror (120) before the first surface (S1), and The above film (130) is positioned between the first light-emitting unit (110) and the first mirror (120), and is positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300), in an electrode vision inspection device.

7. In any one of claims 1 to 6, An electrode vision inspection device in which the direction of the second light (L2) when passing the outer edge of the first surface (S1) corresponds to the direction of the third light (L3) immediately after being reflected by the second surface (S2).

8. A first light emitting part (110) that emits a first light (L1) directed toward a first surface (S1) on one side in the thickness direction of an electrode part (50), and a first light irradiation part (100) comprising a film (130) disposed in at least a portion of the light path of the first light (L1) and changing the brightness or color of the light passing through; A second light irradiation unit (200) comprising a second light emitting unit (210) that emits a third light (L3) directed toward a second surface (S2) on the other side of the thickness direction of the electrode unit (50) and a fourth light (L4) passing through the outer edge of the second surface (S2); A first image acquisition unit (300) that detects the first light (L1) and the fourth light (L4) reflected on the first surface (S1) to acquire a first image (G1); A second image acquisition unit (400) that detects the third light (L3) reflected on the second surface (S2) and acquires a second image (G2); and A detection unit (500) that detects the corner position or contour of the electrode part (50) or a predetermined part (P) of the electrode part (50) based on the brightness value or color value of the first image (G1) and the second image (G2), Electrode vision inspection device.

9. In Claim 8, The above film (130) is an electrode vision inspection device that is positioned in the light path of the first light (L1) toward the edge portion of the first surface (S1) of the above predetermined portion (P).

10. In Claim 9, The first light-emitting part (110) emits a second light (L2) passing along the outer edge of the first surface (S1), and The second image acquisition unit (400) detects the third light (L3) reflected on the second surface (S2) and the second light (L2) to acquire the first image (G1), and The above film (130) is an electrode vision inspection device that is positioned in the light path of the second light (L2) passing through the area adjacent to the edge portion of the first surface (S1) of the above predetermined portion (P).

11. In any one of claims 8 to 10, The first light irradiation unit (100) is coaxial illumination and further includes a first mirror (120) that reflects or passes the first light (L1). The first light (L1) emitted from the first light-emitting unit (110) meets or faces the first mirror (120) before the first surface (S1), and The above film (130) is an electrode vision inspection device disposed between the first light-emitting part (110) and the first mirror (120).

12. In Claim 11, The above film (130) is an electrode vision inspection device that is positioned at a predetermined distance from the light path of the fourth light (L4) incident on the first image acquisition unit (300).

13. In any one of claims 8 to 12, An electrode vision inspection device in which the direction of the fourth light (L4) when passing the outer edge of the second surface (S2) corresponds to the direction of the first light (L1) immediately after being reflected by the first surface (S1).

14. In claim 7 or claim 13, The electrode vision inspection device, wherein the first light irradiation unit (100) and the second light irradiation unit (200) are respectively positioned on one side and the other side in the thickness direction with the electrode unit (50) in between, and are coaxial lights that irradiate light toward the electrode unit (50) in a direction facing each other.

15. In any one of claims 1 to 14, The above film (130) includes a base portion (132) and a pattern portion (134) that is coupled to the base portion (132) and forms a predetermined pattern (T). When the same light passes through the base part (132) and the pattern part (134) individually, the brightness or color of the light differs from each other. The above detection unit (500) is an electrode vision inspection device that detects the corner position or contour of the electrode unit (50) or a predetermined part (P) using information regarding the pattern (T).

16. In Claim 15, The above pattern (T) forms a plurality of parallel slit or line shapes, an electrode vision inspection device.

17. In Claim 16, The above film (130) is positioned in a light path of light emitted from the first light-emitting part (110) toward the first surface (S1) of a predetermined part (P) of the electrode part (50) or toward an area adjacent to the first surface (S1) of the predetermined part (P). An electrode vision inspection device in which the extension direction of the plurality of slits or line shapes of the above pattern (T) intersects the extension direction, length direction, or protrusion direction of the above predetermined part (P).

18. An electrode vision inspection method (S700) using an electrode vision inspection device (10) according to any one of claims 1 to 17, A film placement process (S710) in which the film (130) is placed in the light path of light (L2 or L1) that is emitted from the first light-emitting part (110) and is directed toward an area adjacent to the first surface (S1) of the predetermined part (P) of the electrode part (50) or toward the first surface (S1) of the predetermined part (P); A light irradiation process (S720) in which the first light irradiation unit (100) and the second light irradiation unit (200) irradiate light on both sides of the electrode unit (50); An image acquisition process (S730) in which the first image acquisition unit (300) and the second image acquisition unit (400) acquire the first image (G1) and the second image (G2); and The detection unit (500) includes a detection process (S740) in which it detects the corner position or contour of the predetermined part (P) based on the brightness value or color value of the first image (G1) and the second image (G2). Electrode vision inspection method.

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