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KR-20260067870-A - The visual inspection device for prismatic can of secondary battery

KR20260067870AKR 20260067870 AKR20260067870 AKR 20260067870AKR-20260067870-A

Abstract

The present invention relates to an inspection device for a prismatic can for a secondary battery, capable of detecting defects on the inner side of the prismatic can for a secondary battery through a reflected image by adjusting the position and angle of a mirror. The inspection device for a prismatic can for a secondary battery according to the present disclosure has the effect of improving the speed and accuracy of inspection because it enables internal external inspection without changing the position of the prismatic can.

Inventors

  • 이연호
  • 어욱선
  • 김성기
  • 류지만
  • 가인호
  • 민상식
  • 김남동
  • 김상백

Assignees

  • (주)인스케이프

Dates

Publication Date
20260513
Application Date
20241106

Claims (20)

  1. A first mounting part configured to transport a rectangular can to a first inspection position; An inner inspection unit configured to inspect the inner side of the rectangular can located at the first inspection position; A pair of large surface inspection units configured to be spaced apart by a first interval so that the above-mentioned rectangular can can enter a second inspection position from a small surface having a short side, and to be capable of taking images in a direction facing each other; The above-mentioned rectangular can includes a pair of small face inspection units that are spaced apart by a second interval so that they can be photographed in a direction facing each other, so that the large face having the long side can enter the third inspection position. The above-mentioned inner inspection unit is, A large surface imaging module configured to capture the inner large surface of the rectangular can seated at the first inspection position, and It includes a small surface imaging module configured to capture the inner small surface of the rectangular can seated at the first inspection position, and An appearance inspection device for a rectangular can for a secondary battery, wherein the above-mentioned large surface imaging module and the above-mentioned small surface imaging module each comprise a mirror that is adjustable in angle and position.
  2. In paragraph 1, The above-described large surface shooting module includes a first camera, a first coaxial illumination unit, a first mirror, and a first mirror adjustment unit, and The above small surface imaging module includes a second camera, a second coaxial illumination unit, a second mirror, and a second mirror adjustment unit, and The first mirror adjustment unit is configured to adjust the position and/or angle of the first mirror, and The above second mirror adjustment unit is configured to adjust the angle and/or position of the second mirror, and is an appearance inspection device for a rectangular can for a secondary battery.
  3. In paragraph 2, An external inspection device for a rectangular can for a secondary battery, wherein the first mirror and the first mirror adjustment unit are each provided as a pair to photograph a pair of the large surfaces.
  4. In paragraph 3, The above small surface imaging module is, An external inspection device for a rectangular can for a secondary battery configured to acquire images viewed from different angles according to the height of the small surface by adjusting the angle and/or position of the mirror.
  5. In paragraph 4, The above small surface imaging module is an appearance inspection device for a rectangular can for a secondary battery, consisting of a pair.
  6. In paragraph 5, An external inspection device for a rectangular can for a secondary battery, wherein the above pair of first mirrors are each provided on the outer side of the above pair of large surfaces and are each provided so as to be inclined at a predetermined angle toward the upper side.
  7. In paragraph 2, It further includes a fixing frame configured to fix the above-mentioned large surface shooting module and the above-mentioned small surface shooting module at a predetermined height or higher, and An external inspection device for a rectangular can for a secondary battery, wherein the first inspection position is defined in the space defined by the fixed frame.
  8. In paragraph 2, The first camera mentioned above is, An external inspection device for a rectangular can of a secondary battery configured to adjust the focus in response to the angle and/or position adjustment of the first mirror.
  9. In paragraph 8, The above second camera is, An external inspection device for a rectangular can for a secondary battery configured to adjust the focus in response to the angle and/or position adjustment of the second mirror.
  10. In Paragraph 7, The above-mentioned first coaxial lighting unit is configured to include a plurality of first lighting units, and The above-mentioned second coaxial lighting unit is configured to include a plurality of second lighting units, and An appearance inspection device for a rectangular can for a secondary battery, wherein the first lighting unit and the second lighting unit are configured to be individually controlled.
  11. In paragraph 1, Each of the above large surface inspection sections is, A third camera module configured to capture the above-mentioned large surface; A third coaxial lighting unit configured to irradiate light coaxially with the above camera module; and An external inspection device for a rectangular can for a secondary battery, comprising a large surface periphery lighting unit configured to irradiate light at an angle of 45 degrees or less with respect to the large surface.
  12. In Paragraph 11, The above-mentioned large surface surrounding lighting unit, A large surface lighting unit comprising a surface-emitting unit along a plane orthogonal to the above large surface. Appearance inspection device for prismatic cans for secondary batteries.
  13. In Paragraph 12, The above large surface surrounding lighting unit is equipped with four units, and An appearance inspection device for a rectangular can for a secondary battery, provided in four directions along the corners of the above-mentioned large surface.
  14. In Paragraph 13, The above-mentioned large surface ambient lighting unit is, An external inspection device for a rectangular can for a secondary battery, provided outside the area where light is irradiated by the third coaxial lighting unit.
  15. In Paragraph 14, Each of the above large surface inspection sections is, One side is configured with a cross-sectional area of the first surface, and a hole is formed in the center configured to allow the camera module to take a picture, and An external inspection device for a rectangular can for a secondary battery, further comprising a case configured such that the other side is composed of a second area with a cross-sectional area larger than the first area, and the surrounding lighting unit can be provided on the inner side of the side wall.
  16. In paragraph 15, An appearance inspection device for a rectangular can for a secondary battery, wherein the first gap is configured to be larger than the length of the short side.
  17. In Paragraph 16, An appearance inspection device for a rectangular can for a secondary battery, wherein the second gap is configured to be larger than the length of the long side.
  18. In Paragraph 17, It is provided on the lower side of the above-mentioned large surface inspection unit, and An external inspection device for a prismatic can for a secondary battery, further comprising an outer bottom surface inspection unit configured to obtain an image of the outer bottom surface of the prismatic can.
  19. In Paragraph 18, Each of the above small surface inspection sections is, A fourth camera module configured to capture the above-mentioned small surface; A fourth coaxial lighting unit configured to irradiate light coaxially with the above camera module; and An appearance inspection device for a rectangular can for a secondary battery, comprising a small surface perimeter lighting unit configured to irradiate light at an angle of 45 degrees or less to the small surface.
  20. In Paragraph 19, An appearance inspection device for a prismatic can for a secondary battery, further comprising a conveying unit configured to pick up the prismatic can and pass it between the pair of large face inspection units.

Description

Visual inspection device for prismatic can of secondary battery The present invention relates to an external inspection device for a prismatic can for a secondary battery, and to an inspection device capable of acquiring an accurate image of the interior without changing the orientation of the object. Various inspection methods are utilized during the production of secondary batteries to determine whether the outer casing is normal or defective. Among these, vision inspection is a process that acquires images of an object to determine whether there are any external defects. Since even minute defects in secondary battery cans can result in critical flaws in the final product, defect inspection of the cans must be performed with greater precision and accuracy. Korean Registered Patent No. 1287464 is disclosed in relation to an inspection device for such secondary battery cans. However, this prior art had the problem that it was difficult to obtain images of the inner and outer sides of the can, and also difficult to determine defects based on these images. FIG. 1 is a drawing illustrating a rectangular can that is subject to inspection in the present disclosure. FIG. 2 is a block diagram of an external inspection device for a rectangular can for a secondary battery according to one embodiment of the present disclosure. FIG. 3 is a perspective view of an external inspection device for a rectangular can for a secondary battery according to one embodiment of the present disclosure. FIG. 4 is a perspective view of an inner inspection unit in one embodiment of the present disclosure. FIG. 5 is an exploded perspective view of an inner inspection unit in one embodiment of the present disclosure. FIG. 6 is a perspective view of the first mirror and the first mirror adjustment unit. Figure 7 is an exploded view of the first mirror adjustment unit. FIG. 8 is an operating state diagram illustrating the angle adjustment operation of the first mirror adjustment unit. FIG. 9 is a drawing illustrating the operation of a large surface imaging module in one embodiment of the present disclosure. FIG. 10 is a drawing illustrating the operation of a small surface imaging module in one embodiment of the present disclosure. FIG. 11a is a drawing illustrating the shooting area according to the operation of a large surface shooting module in one embodiment of the present disclosure. FIG. 11b is a drawing illustrating a shooting area according to the operation of a small surface shooting module in one embodiment of the present disclosure. FIGS. 12a and FIGS. 12b are images obtained by the operation of a large surface imaging module in one embodiment of the present disclosure. FIGS. 13a and FIGS. 13b are images obtained by the operation of a small face-taking module in one embodiment of the present disclosure. FIG. 14 is a perspective view of an external inspection unit in one embodiment of the present disclosure. FIG. 15 is a perspective view of a large surface inspection unit in one embodiment of the present disclosure. FIG. 16 is an exploded perspective view of a large surface inspection unit in one embodiment of the present disclosure. FIG. 17 is an operating state diagram of a large surface inspection unit in one embodiment of the present disclosure. FIG. 18 is a conceptual diagram showing an optical path at a first inspection position in one embodiment of the present disclosure. Figure 19 is an enlarged view of section I in Figure 18. FIG. 20 is a conceptual diagram showing an optical path at a second inspection position in one embodiment of the present disclosure. FIG. 21 is a conceptual diagram showing the area inspected by each inspection unit in one embodiment of the present disclosure based on the bottom view of a rectangular can. FIG. 22 is a conceptual diagram illustrating a silhouette image of a can taken in one embodiment of the present disclosure. FIG. 23 is a usage diagram showing the transfer of a rectangular can according to the inspection process in one embodiment of the present disclosure. FIG. 24 is a usage diagram showing the transfer of a rectangular can according to the inspection process in another embodiment of the present disclosure. Hereinafter, an external inspection device for a prismatic can for a secondary battery according to an embodiment of the present invention will be described in detail with reference to the attached drawings. In the following description of the embodiments, the names of each component may be referred to by different names in the art. However, if there is functional similarity and identity between them, even if a modified embodiment is adopted, it can be considered an equivalent configuration. Additionally, symbols attached to each component are indicated for convenience of explanation. However, the content of the drawings in which these symbols are indicated does not limit each component to the scope within the drawings. Likewise, even if an embodiment with a partially modified