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EP-4354124-B1 - DEVICE FOR INSPECTING SIDE SURFACE OF CYLINDRICAL BATTERY

EP4354124B1EP 4354124 B1EP4354124 B1EP 4354124B1EP-4354124-B1

Inventors

  • KIM, JIWON
  • KIM, TAE YOUNG
  • HONG, SEUNG GYUN

Dates

Publication Date
20260506
Application Date
20220816

Claims (6)

  1. A side surface inspection device (100) for a cylindrical battery (200) that has a first area (A1) that is a part of a side surface (200S), a second area (A2) that is another part of the side surface (200S), a third area (A3) that is still another part of the side surface (200S), and a fourth area (A4) that is a remaining part of the side surface (200S), the first area (A1), the second area (A2), the third area (A3), and the fourth area (A4) being adjacent to each other and arranged sequentially along a circumference, the side surface inspection device (100) comprising: a first light (110) configured to emit light in a direction toward the side surface (200S) of the cylindrical battery (200); a plurality of mirrors (120, 121-124) including a first mirror (121), a second mirror (122), a third mirror (123), and a fourth mirror (124) that each are configured to reflect light emitted from the first light (110) to be incident on each of the first area (A1), the second area (A2), the third area (A3), and the fourth area (A4), respectively, of the cylindrical battery (200), and are configured to reflect light reflected by each of the first area (A1), the second area (A2), the third area (A3), and the fourth area (A4), respectively, of the cylindrical battery (200); and a camera (130) configured to receive the light reflected by each of the plurality of mirrors (120, 121-124) and configured to form an image including images of the first area (A1), the second area (A2), the third area (A3), and the fourth area (A4) of the cylindrical battery (200); the side surface inspection device (100) of the cylindrical battery (200) further comprising: a prism (140) configured to adjust a path of at least a part of the light emitted from the first light (110) and incident on the plurality of mirrors (120, 121-124) and at least a part of the light reflected by the cylindrical battery (200) and reflected by the plurality of mirrors (120, 121-124) again; characterized in that the prism (140) faces the first light (110) and is between the cylindrical battery (200) and the first light (110); wherein the first light (110) faces the first and fourth areas (A1, A4) of the cylindrical battery (200), and wherein a part of the light emitted from the first light (110) is incident on a lens (130L) of the camera (130) via the prism (140), the first mirror (121), the first area (A1) of the cylindrical battery (200), the first mirror (121) and the prism (140), another part of the light emitted from the first lighting (110) is incident on the lens (130L) of the camera (130) via the second mirror (122), the second area (A2) of the cylindrical battery (200) and the second mirror (122), still another part of the light emitted from the first lighting (110) is incident on the lens (130L) of the camera (130) via the third mirror (123), the third area (A3) of the cylindrical battery (200) and the third mirror (123), and still another part of the light emitted from the first lighting (110) is incident on the lens (130L) of the camera (130) via the prism (140), the fourth mirror (124), the fourth area (A4) of the cylindrical battery (200), the fourth mirror (124) and the prism (140).
  2. The side surface inspection device (100) of the cylindrical battery (200) according to claim 1, wherein the first light (110) is configured to emit light to at least one of the prism (140) and the plurality of mirrors (120, 121-124).
  3. The side surface inspection device (100) of the cylindrical battery (200) according to claim 1, wherein the first light (110) faces the cylindrical battery (200) and is between the cylindrical battery (200) and a lens (130L) of the camera (130).
  4. The side surface inspection device (100) of the cylindrical battery (200) according to claim 1, wherein the camera (130) includes a lens mirror (130M) configured to reflect light incident on the lens (130L) and placed to form an angle of approximately 45° with the lens (130L).
  5. The side surface inspection device (100) of the cylindrical battery (200) according to claim 1, further comprising: a second light (150) at one side of the cylindrical battery (200).
  6. The side surface inspection device (100) of the cylindrical battery (200) according to claim 1, wherein each of the first area (A1), the second area (A2), the third area (A3) and the fourth area (A4) of the cylindrical battery (200) respectively correspond to the side surface (200S) of the cylindrical battery (200) divided into four equal parts.

Description

[Technical Field] The present application claims the benefit of priority based on Korean Patent Application No. 10-2021-0140139 filed on October 20, 2021. The present disclosure relates to a side surface inspection device of a cylindrical battery. More specifically, the present disclosure relates to a cylindrical battery side surface inspection device capable of performing an exterior inspection of a side surface without rotating and rolling a cylindrical battery. [Background Art] With increasing technological development and demand for mobile devices, rechargeable secondary batteries are widely used as energy sources for various mobile devices. In addition, the secondary batteries are attracting attention as an energy source for an electric vehicle and a hybrid vehicle, which are proposed as measures for solving air pollution caused by existing gasoline vehicles and diesel vehicles. The secondary batteries are classified into a coin-shaped battery, a cylindrical battery, a prismatic battery, and a pouch-shaped battery depending on the shape of the battery case. Among them, when inspecting the side surface exterior of the cylindrical battery, it is required to rotate or roll the battery by 360 degrees to obtain an image, and there is a problem that noise is generated in the image when the battery is rotated or rolled, resulting in the degradation of the image quality and detectability of the inspection device. KR 2002-0093507 A and KR 10-1525700 B1 relate to inspection of square-shaped electronic components. [Prior Art Document] [Patent Document] (Patent Document 1) Korean Laid-open Patent Publication No. 10-2021-0103180 (August 23, 2021) [Disclosure] [Technical Problem] One object of the present disclosure is to provide a cylindrical battery side surface inspection device capable of performing a side surface exterior inspection without rotating and rolling the cylindrical battery. Another object of the present disclosure is to provide a cylindrical battery side surface inspection device that can prevent image noise and improve image quality and detectability of the inspection device. [Technical Solution] In order to solve the above problems, in an embodiment of the present invention, there is provided a side surface inspection device of a cylindrical battery which has a first area that is a part of a side surface, a second area that is another part of the side surface, a third area that is still another part of the side surface, and a fourth area that is a remaining part of the side surface, wherein the first area, the second area, the third area, and the four area being adjacent to each other and arranged sequentially along a circumference. The side surface inspection device includes a first lighting which emits light in a direction toward the side surface of the cylindrical battery; a plurality of mirrors including a first mirror, a second mirror, a third mirror, and a fourth mirror which reflect light emitted from the first lighting to make the light incident on each of the first area, the second area, the third area and the fourth area of the cylindrical battery, and reflect the lights reflected by each of the first area, the second area, the third area, and the fourth area of the cylindrical battery again; and a camera on which light reflected by each of the plurality of mirrors again is incident and which forms an image including images of the first area, the second area, the third area and the fourth area of the cylindrical battery. The side surface inspection device of the cylindrical battery further comprises a prism configured to adjust a path of at least a part of the light emitted from the first light and incident on the plurality of mirrors and at least a part of the light reflected by the cylindrical battery and reflected by the plurality of mirrors again. The prism faces the first light and is between the cylindrical battery and the first light. The first light faces the first and fourth areas of the cylindrical battery. A part of the light emitted from the first light is incident on a lens of the camera via the prism, the first mirror, the first area of the cylindrical battery, the first mirror and the prism. Another part of the light emitted from the first lighting is incident on the lens of the camera via the second mirror, the second area of the cylindrical battery and the second mirror. Still another part of the light emitted from the first lighting is incident on the lens of the camera via the third mirror, the third area of the cylindrical battery and the third mirror. Still another part of the light emitted from the first lighting is incident on the lens of the camera via the prism, the fourth mirror, the fourth area of the cylindrical battery, the fourth mirror and the prism. [Advantageous Effects] According to one of the effects of the present disclosure, it is possible to provide a cylindrical battery side surface inspection device capable of performing a side surface exterior ins