Battery inspection device

Abstract

The battery inspection apparatus according to the present invention comprises: an upper inspection unit including a first lens module focusing first light and a first camera mounted above the first lens module; a lower inspection unit including a second lens module disposed horizontally spaced apart from the first lens module and focusing second light incident from the inspection object, and a second camera mounted above the second lens module; and an optical path guiding unit integrally coupled to the first lens module and the second lens module and configured to split incident light incident from an inspection object into first light and second light, and guide the first light to the first lens module and the second light to the second lens module.

Description

Technical Field

[0001] The present disclosure relates to an apparatus for inspecting the quality of a battery during a battery production process, and more particularly, to an inspection apparatus for inspecting the quality of a welding area or an assembly area.

[0002] This application claims priority to Korean Patent Application No. 10-2022-0173077 filed in Korea on December 12, 2022, and Korean Patent Application No. 10-2023-0174956 filed in Korea on December 5, 2023, the disclosures of which are incorporated herein by reference. Background Art

[0003] like Figure 1 As shown, the conventional inspection device for the welding area of ​​a cylindrical battery inspects the welding area by inserting an endoscope lens 1 into the battery 20 .

[0004] Inspection using the above method makes it difficult to respond to fast production line speeds due to the limited rising and falling speeds of the endoscope lens 1. In addition, during the battery production process, inserting the endoscope lens 1 into the battery 20 requires the product to stop at the inspection section.

[0005] There is also the problem of damage to the battery and inspection device during insertion of the endoscope lens.

[0006] Therefore, a new cylindrical battery welding inspection device (capable of inspecting defects occurring during welding with improved image quality) is needed to replace the endoscopic lens insertion inspection device that disrupts the tact time and causes damage to the battery and the inspection device. Summary of the invention

[0007] Technical issues

[0008] The present disclosure aims to solve the problems of the related art, and therefore the present disclosure aims to provide an inspection device that can inspect the quality of batteries during the battery production process without stopping the production line, eliminate the risk of damaging the product or the inspection device during the battery inspection process, and perform more accurate inspections.

[0009] The present disclosure also provides an inspection device capable of simultaneously inspecting an upper welding area and an appearance of a battery as well as a lower welding area thereof.

[0010] However, the technical problems that the present disclosure seeks to solve are not limited to the above problems, and those skilled in the art will clearly understand other problems not mentioned above from the description of the present disclosure described below.

[0011] Technical Solution

[0012] According to one aspect of the present disclosure, a battery inspection device according to one aspect of the present disclosure is provided, which may include: an upper inspection unit, the upper inspection unit including a first lens module configured to focus a first light and a first camera mounted on the top of the first lens module; a lower inspection unit, the lower inspection unit is horizontally arranged to be spaced apart from the first lens module, and includes a second lens module configured to focus a second light and a second camera mounted on the top of the second lens module; and an optical path guiding unit, the optical path guiding unit is integrally connected to the first lens module and the second lens module, and is configured to divide incident light incident from an inspection object into a first light and a second light, guide the first light to the first lens module, and guide the second light to the second lens module.

[0013] The light path guide unit may include: a beam splitter configured to split the incident light into the first light and the second light; and a reflecting mirror configured to refract the first light toward the first lens module.

[0014] The light path guiding unit may include: a barrel portion configured in a box shape and having a channel for the first light and the second light to pass through; a first lens connecting hole, which is arranged on the top of the barrel portion, and the first lens module is connected to the first lens connecting hole; a second lens connecting hole, which is arranged on the top of the barrel portion, and the second lens module is connected to the second lens connecting hole; and a light inlet, which is arranged on the bottom of the barrel portion, and the light enters and leaves the barrel portion through the light inlet.

[0015] Inside the channel, the reflector may be vertically disposed below the first lens connection hole, the beam splitter may be vertically disposed below the second lens connection hole, and the light inlet may be vertically disposed below the beam splitter.

[0016] The optical path guide unit may include: a mirror supporter configured to support and hold the reflection mirror; a beam splitter supporter configured to support and hold the beam splitter; and a groove through which the mirror supporter and the beam splitter supporter are inserted into the barrel from the outside.

[0017] The second lens module may include a telecentric lens.

[0018] The upper inspection unit may include a first lighting device coupled with the first lens module.

[0019] The first lighting device may be a coaxial projection lighting device.

[0020] The lower inspection unit may include a second lighting device coupled with the second lens module.

[0021] The second lighting device may be a parallel light lighting device.

[0022] The lower inspection unit may include an aperture controller capable of controlling an amount of light entering the second lens module from the second lighting device.

[0023] The aperture controller may include: an aperture unit, which is mounted to a lighting connection hole provided on the second lens module for connecting a second lighting device, and is configured so that a gear provided on an outer surface rotates clockwise or counterclockwise to gradually increase or decrease its diameter, thereby adjusting the amount of light entering the lighting connection hole; a motor bracket, which is connected to the outside of the second lens module; a drive motor, which is fixed to the motor bracket; and a timing belt, which is connected to the drive motor and the gear.

[0024] Beneficial Effects

[0025] According to one aspect of the present disclosure, an inspection device can be provided that is capable of inspecting battery quality without stopping a production line during a battery production process, eliminating the risk of damaging a product or the inspection device during a battery inspection process, and performing a more accurate inspection.

[0026] The present disclosure is capable of simultaneously inspecting the upper welding area and the lower welding area of ​​a battery, thereby significantly reducing the takt time of the battery inspection process.

[0027] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned above will be clearly understood by those skilled in the art to which the present disclosure pertains from the description of the present disclosure described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 1 is a diagram schematically showing a battery inspection device according to the prior art.

[0029] Figure 2 is a perspective view of a battery inspection device according to an embodiment of the present disclosure.

[0030] Figure 3 yes Figure 2 An exploded perspective view of the battery inspection device in FIG.

[0031] Figure 4 yes Figure 2 Schematic cross-sectional view of a battery inspection device in FIG.

[0032] Figure 5 yes Figure 2 Bottom view of the battery inspection device in FIG.

[0033] Figure 6 yes Figure 2 Left side view of the battery inspection device in .

[0034] Figure 7 yes Figure 2 Front view of the battery inspection device in FIG.

[0035] Figure 8 yes Figure 2 Right side view of the battery inspection device in .

[0036] Fig. 9 It is shown Figure 2 Diagram of the aperture controller of the battery inspection device.

[0037] Fig.10 is a cross-sectional view schematically showing a battery inspected using the battery inspecting device according to an embodiment of the present disclosure.

[0038] Fig.11 is a diagram showing a light path for inspecting an upper region in a battery when photographing an upper region of the battery using an upper inspection unit according to an embodiment of the present disclosure.

[0039] Fig.12 is a diagram showing a light path for inspecting a lower region in a battery when photographing the lower region of the battery using a lower inspection unit according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as being limited to general and dictionary meanings, but should be interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure based on the principle of allowing the inventor to appropriately define the terms to obtain the best interpretation. Therefore, the configurations proposed in the embodiments of this specification and the accompanying drawings only indicate the most preferred embodiments of the present disclosure and do not represent all the technical ideas of the present disclosure, so it should be understood that various equivalents and modifications may be made to them when filing an application.

[0041] The battery inspection apparatus according to the present disclosure may inspect upper and lower regions of a battery during a battery production process to inspect defects.

[0042] As will be described in detail later, the battery inspection device according to the present disclosure is configured to simultaneously obtain images of the upper and lower regions of the battery 20 while the battery 20 is moving in the battery production line, and to inspect the states of the upper and bottom regions of the battery. Therefore, the battery quality can be inspected without stopping the production line during the battery production process, thereby reducing the cycle time of the battery production process. In addition, compared to the endoscopic inspection method described in the above-mentioned background technology, the battery inspection device according to the present disclosure is configured to obtain an image of the lower region inside the battery from the outside of the battery, avoiding interference or collision between the battery inspection device and the battery.

[0043] Hereinafter, main elements of the battery inspection device according to the present disclosure will be described in detail.

[0044] Figure 2 is a perspective view of a battery inspection device according to an embodiment of the present disclosure, Figure 3 yes Figure 2 An exploded perspective view of the battery inspection device in FIG. Figure 4 yes Figure 2 Schematic cross-sectional view of a battery inspection device in FIG.

[0045] like Figures 2 to 4 As shown, the battery inspection device according to an embodiment of the present disclosure may include an upper inspection unit 100 , a lower inspection unit 200 , and a light path guiding unit 300 .

[0046] The upper inspection unit 100 and the lower inspection unit 200 may be configured to photograph different parts of an inspection object. For example, the upper inspection unit 100 may be configured to photograph the upper region of the battery 20 as the inspection object and perform defect inspection, and the lower inspection unit 200 may be configured to photograph the lower region inside the battery 20 as the inspection object and perform defect inspection.

[0047] The upper inspection unit 100 may include a first lens module 110 for focusing first light incident from an inspection object and a first camera 120 detachably coupled to the first lens module 110. The first lens module 110 may include a substantially cylindrical barrel and at least one lens 111 therein.

[0048] The first camera 120 is a device for obtaining and storing an image of the inspection object. In the present embodiment, the first camera 120 obtains and stores an image of the upper welding area of ​​the battery. The first camera 120 may be, for example, a CCD (charge coupled device) camera, which uses a CCD as an image sensor to convert an image into an electrical signal and stores its digital data in a storage medium such as a flash memory.

[0049] The lower inspection unit 200 may include a second lens module 210 for focusing a second light incident from the inspection object and a second camera 220 detachably coupled to the second lens module 210. The second lens module 210 may include a substantially cylindrical barrel and at least one lens 211 within the barrel. In particular, in the present embodiment, the lens constituting the second lens module 210 may be a telecentric lens. Here, a telecentric lens refers to a lens designed to generate parallel light regardless of the parallel distance. Since the telecentric lens only receives light parallel to the optical axis, there is no perspective error, so even the welding area in the lower area inside the battery can more accurately inspect the welding thickness, etc.

[0050] Like the first camera 120, the second camera 220 is a device for obtaining and storing an image of the inspection object, and may be, for example, a CCD camera. However, the second camera 220 obtains and stores an image of a portion of the inspection object that is different from the image of the first camera 120. For example, in the present embodiment, the first camera 120 obtains and stores an image of the upper region of the battery, and the second camera 220 obtains and stores an image of the lower region inside the battery.

[0051] The light path guide unit 300 may be configured to separate incident light incident from the inspection object into first light and second light, guide the first light to the first lens module 110 , and guide the second light to the second lens module 210 .

[0052] To this end, the optical path guiding unit 300 according to the present embodiment may include a beam splitter 320 and a reflector 330. Here, the beam splitter 320 represents an optical device that splits a light beam into two or more light beams. In this embodiment, the beam splitter 320 may be configured to split the incident light incident from the inspection object into a first light and a second light. That is, the first light is a reflected light of the incident light reflected from the beam splitter 320, and the second light is a transmitted light in the incident light passing through the beam splitter 320. For example, the beam splitter 320 may be configured to reflect approximately 50% of the incident light and transmit approximately 50% of the incident light.

[0053] The beam splitter 320 may be disposed vertically above the inspection object, and the second lens module 210 may be disposed vertically above the beam splitter 320. In this case, the second light may be directly incident on the second lens module 210. However, since the first light is reflected from the beam splitter 320 and travels in the horizontal direction (-Y axis direction), the optical path must be changed toward the first lens module 110.

[0054] The reflector 330 is a device for changing an optical path of the first light, and may be disposed vertically below the first lens module 110 so as to guide the first light reflected from the beam splitter 320 to the first lens module 110 .

[0055] According to this configuration, light incident from the inspection object can be guided to the first lens module 110 and the second lens module 210 which are spaced apart from each other in the horizontal direction. In addition, for example, if the focal length (or working distance) of the first lens module 110 is configured to be different from the focal length of the second lens module 210, different areas of one inspection object can be inspected simultaneously using the first lens module 110 and the second lens module 210.

[0056] The light path guide unit 300 may be integrally coupled to the first lens module 110 and the second lens module 210 .

[0057] Specifically, refer to Figures 3 to 5The light path guide unit 300 may include a barrel 310 , a first lens connection hole 311 , a second lens connection hole 312 , and a light entrance 313 .

[0058] The cylinder 310 may have a passage through which the first light and the second light pass, and may be substantially configured in a box shape.

[0059] like Figure 3 As shown, the first lens connection hole 311 and the second lens connection hole 312 may be respectively provided on the top of the barrel 310. The lower end of the first lens module 110 may be inserted and fixed into the first lens connection hole 311, and the lower end of the second lens module 210 may be inserted and fixed into the second lens connection hole 312.

[0060] In this case, if Figure 4 As shown, the lower lens of the first lens module 110 can face the interior of the barrel 310 through the first lens connecting hole 311 , and the lower lens of the second lens module 210 can also face the interior of the barrel 310 through the second lens connecting hole 312 .

[0061] The light inlet 313 may be provided at the bottom of the barrel 310. Light incident from the inspection object may enter the barrel 310 through the light inlet 313. In addition, as will be described later, illumination light for illuminating the inspection object may pass from the inside of the barrel 310 to the outside through the light inlet 313.

[0062] In this embodiment, the beam splitter 320 and the reflector 330 are disposed in the channel S of the cylinder 310. Specifically, Figure 4 As shown, the beam splitter 320 may be disposed vertically below the second lens connection hole 312. In addition, the light inlet 313 may be located vertically below the beam splitter 320.

[0063] The beam splitter 320 may be configured in the form of a plate and assembled inside the channel of the barrel 310 so that its plate surface forms an angle of about 45 degrees with the horizontal plane in the clockwise direction. Light incident through the light inlet 313 may be reflected and transmitted by the beam splitter 320. That is, in Figure 4 In the case of the plate-shaped beam splitter 320 shown, some of the light vertically entering the barrel 310 through the light inlet 313 can be reflected by the plate-shaped beam splitter 320 so that its optical path is turned 90 degrees to the left along the horizontal direction, and the remaining light can pass through the plate-shaped beam splitter 320 and directly proceed toward the second lens connection hole 312. Here, among the two light beams separated by the beam splitter 320, the light beam whose optical path is changed by reflection from the beam splitter 320 corresponds to the first light, and the light beam passing through the beam splitter 320 corresponds to the second light. Meanwhile, although the beam splitter 320 of the present embodiment is a plate-shaped one, the beam splitter 320 may also be configured as a cubic type.

[0064] The reflector 330 may be spaced apart from the beam splitter 320 in the horizontal direction and disposed vertically below the first lens connection hole 311. In addition, the reflector 330 may be assembled inside the channel of the barrel 310 to form an angle of about 45 degrees with the horizontal plane in the clockwise direction.

[0065] The reflector 330 changes the traveling direction of the first light reflected from the beam splitter 320 and traveling horizontally to a vertical direction. Therefore, the first light may be reflected from the reflector 330 and incident on the first lens module 110 while changing its traveling direction toward the first lens connection hole 311 .

[0066] Meanwhile, the beam splitter 320 and the reflecting mirror 330 may be disposed to be inserted into or separated from the cylindrical portion 310 .

[0067] For example, the optical path guiding unit 300 according to the present embodiment may include a mirror support 331 for supporting and holding the reflecting mirror 330 and a beam splitter support 321 for supporting and holding the beam splitter 320, and may be configured to have a groove through which the mirror support 331 and the beam splitter support 321 can be respectively inserted into the barrel 310 from the outside.

[0068] For example, Figure 4 As shown, the barrel 310 may include a first insertion groove 315 into which the mirror support 331 is inserted on the left side. The mirror support 331 may be configured to be inserted into the barrel 310 from the outside through the first insertion groove 315. After the mirror support 331 is inserted into the barrel 310, the entrance of the first insertion groove 315 may be covered with a first groove cover plate 316, as shown in FIG. Figure 6 shown.

[0069] In addition, the barrel 310 may include a second insertion groove (not shown) on the right front side into which the beam splitter support 321 is inserted. The second insertion groove may be formed from the front to the rear (in the ±X-axis direction) of the barrel 310. The beam splitter support 321 may be configured to be inserted into the barrel 310 from the outside through the second insertion groove. After the beam splitter support 321 is inserted into the barrel 310, the entrance of the second insertion groove may be covered with a second groove cover plate 314, such as Figure 7 shown.

[0070] According to this configuration, the beam splitter 320 and the mirror 330 can be easily disposed in or separated from the barrel 310. Furthermore, the mirror 330 or the beam splitter 320 having different tilt angles, reflectivity, and transmittance characteristics can be easily replaced as needed.

[0071] Return to reference Figure 2 and Figure 3The battery inspection apparatus according to an embodiment of the present disclosure may further include a lighting device to obtain a bright image from the inspection object.

[0072] The upper inspection unit 100 may include a first lighting device 130, and the first lighting device 30 and the first lens module 110 may be configured to be assembled with each other. The first lens module 110 may be configured to include a lighting detachable portion 113 on one side of the barrel, and the first lighting device 130 may be mounted on the lighting detachable portion 113 so that the first lighting device 130 may be coupled thereto. In the present embodiment, the first lighting device 130 may be a coaxial projection lighting device.

[0073] The lower inspection unit 200 may include a second lighting device 230, and the second lighting device 230 and the second lens module 210 may be configured to be assembled with each other. The second lens module 210 may be configured to include a lighting connection hole on one side of the barrel, and the second lighting device 230 may be mounted on the lighting connection hole so that the second lighting device 230 may be connected thereto. In the present embodiment, the second lighting device 230 may be a parallel light lighting device.

[0074] In particular, the lower inspection unit 200 may further include an aperture controller 240 capable of controlling the amount of light entering the second lens module 210 from the second lighting device 230 .

[0075] like Fig. 9 As shown, the aperture controller 240 may include an aperture unit 241 , a motor bracket 242 , a driving motor 243 , and a timing belt 244 .

[0076] The aperture unit 241 can be mounted to an illumination connection hole (not shown) provided in the second lens module 210 for connecting the second illumination device 230, and can be configured so that a gear 241a provided on the outer surface rotates clockwise or counterclockwise to gradually increase or decrease its diameter, thereby adjusting the amount of light entering the illumination connection hole.

[0077] The motor bracket 242 is fixed to the second lens module 210 and may be configured in a plate shape on which the driving motor 243 may be assembled.

[0078] The driving motor 243 may include a body fixed to the motor bracket 242 and a shaft 243 a that rotates in a forward and reverse direction. The shaft 243 a of the driving motor and the gear 241 a of the aperture unit may be connected by a timing belt 244 .

[0079] As described above, the lower inspection unit 200 may include the aperture controller 240 to automatically adjust the amount of light, and may control the number of revolutions of the driving motor 243 to accurately adjust the amount of light.

[0080] Meanwhile, the battery inspection device according to the embodiment of the present disclosure may further include a device bracket 400. Figures 2 to 3 and Figure 8 , the device support 400 can be connected to the second lens module 210 and the light path guide unit 300. Although not shown, the device support 400 can be connected to a conveying device (not shown) that can move in the 3-axis (X, Y, Z) direction. In this case, the battery inspection device can move up and down, left and right, and front and back relative to the inspection object.

[0081] Next, we will refer to Figures 10 to 12 An inspection process of the upper region 21 and the lower region 22 of a cylindrical battery that may be performed by the battery inspection apparatus according to the present disclosure is briefly described.

[0082] like Fig.10 As shown, the cylindrical battery 20 as the inspection object in the present embodiment is a jointless cylindrical secondary battery and has a center hole H at the center of the electrode assembly 23. The center hole H formed at the center of the electrode assembly 23 corresponds to the portion where the winding rod (not shown) for winding the electrode assembly around it is removed. Welding can be performed between the positive electrode collector 27 and the positive terminal 25 disposed in the lower region of the cylindrical battery. In this case, a welding rod can be inserted into the center hole H of the electrode assembly 23, or a laser beam can be radiated through the center hole H in the electrode assembly 23, thereby performing welding. In addition, the cylindrical battery 20 has a negative electrode collector 26 in the upper region. The edge of the negative electrode collector 26 can be welded to the inner surface of the battery can, and its lower surface can be welded to the uncoated portion of the negative electrode.

[0083] In this embodiment, the lower inspection unit 200 of the battery inspection device can inspect the lower region 22 of the battery where the positive terminal 25 and the positive current collector 27 are welded to each other. In addition, the upper inspection unit 100 of the battery inspection device can inspect the upper region 21 of the battery where the negative current collector 26 is assembled.

[0084] During the battery production process, the cylindrical battery 20 may be transported by a transport device such as a conveyor belt. The battery inspection device of the present disclosure can photograph the cylindrical battery 20 transported during the battery production process at high speed, thereby obtaining an image of the inspection target area.

[0085] The upper inspection unit 100 of the battery inspection device photographs the upper area 21 of the cylindrical battery, and the lower inspection unit 200 photographs the inner lower area 22 of the cylindrical battery. To this end, the first lens module 110 and the second lens module 210 may have different focal lengths (working distances).

[0086] For example, in the present embodiment, the first lens module 110 may be configured with a focal length from its lower lens to the surface to be observed of the upper region 21 of the cylindrical battery. In this case, a clear image of the upper region 21 of the cylindrical battery can be obtained using the first lens module 110. In addition, in the present embodiment, the second lens module 210 may be configured with a focal length from its lower lens to the surface of the inner lower region 22 of the cylindrical battery to be observed. In this case, a clear image of the inner lower region 22 of the cylindrical battery can be obtained using the second lens module 210.

[0087] The battery inspection device is positioned to be spaced upward from the cylindrical battery 20, and photographs each cylindrical battery being transported, thereby performing defect inspection. Specifically, when the transported cylindrical battery 20 is located below the light inlet 313 of the light path guide unit 300, the first lighting device 130 is turned on, and the first camera 120 obtains an image of the upper area 21 of the cylindrical battery. At this time, as shown in FIG. Fig.11 As shown, the incident light L incident on the light inlet 313 from the upper area 21 of the cylindrical battery can be divided into first light L1 and second light L2 by the beam splitter 320, so that the first light L1 can reach the image sensor of the first camera 120 through the reflector 330 and the first lens module 110, thereby obtaining an image of the upper area 21 of the cylindrical battery.

[0088] The second lighting device 230 of the lower inspection unit 200 may be turned on with a very short time difference from the first lighting device 130. When the second lighting device 230 is turned on, the first lighting device 130 may be turned off. When the second lighting device 230 is turned on, the second camera 220 obtains an image of the cylindrical inner lower area 22 of the battery. At this time, as shown in FIG. Fig.12 As shown, the incident light L incident from the lower area 22 inside the cylindrical battery to the light inlet 313 can be separated into a first light L1 and a second light L2 by the beam splitter 320, so that the second light L2 can reach the image sensor of the second camera 220 through the second lens module 210, thereby obtaining an image of the lower area 22 inside the cylindrical battery.

[0089] Since the upper inspection unit 100 photographs the upper region 21 of the cylindrical battery and the lower inspection unit 200 photographs the lower region 22 of the cylindrical battery very quickly, they actually occur almost simultaneously. Therefore, it is possible to obtain images of the upper region 21 and the lower region 22 of the cylindrical battery without stopping the production line during the battery production process, and inspect the welding quality of the corresponding regions.

[0090] As described above, although the present disclosure has been described with reference to limited embodiments and drawings, the present disclosure is not limited thereto, and those skilled in the art to which the present disclosure belongs may make various modifications and changes within the technical idea of ​​the present disclosure and the equivalent scope of the claims.

[0091] At the same time, although terms indicating directions (such as up, down, left, right, front and rear directions) are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the position of the target object or the position of the observer.

[0092] As described above, although the present disclosure has been described with reference to limited embodiments and drawings, the present disclosure is not limited thereto, and those skilled in the art to which the present disclosure belongs may make various modifications and changes within the technical idea of ​​the present disclosure and the equivalent scope of the claims.

Claims

1. A battery inspection device, comprising: an upper inspection unit including a first lens module configured to focus a first light and a first camera mounted on top of the first lens module; a lower inspection unit horizontally disposed to be spaced apart from the first lens module, and comprising a second lens module configured to focus a second light and a second camera mounted on top of the second lens module; as well as A light path guiding unit is integrally connected to the first lens module and the second lens module and is configured to separate incident light incident from an inspection object into the first light and the second light, guide the first light to the first lens module, and guide the second light to the second lens module.

2. The battery inspection device according to claim 1, in, The light path guiding unit comprises: a beam splitter configured to split the incident light into the first light and the second light; and A reflector is configured to refract the first light toward the first lens module.

3. The battery inspection device according to claim 2, in, The light path guiding unit comprises: a barrel portion configured in a box shape and having a passage for the first light and the second light to pass through; a first lens connection hole, the first lens connection hole being disposed on the top of the barrel portion, and the first lens module being connected to the first lens connection hole; a second lens connection hole, the second lens connection hole being disposed on the top of the barrel portion and the second lens module being connected to the second lens connection hole; and A light inlet is disposed on the bottom of the barrel, and light enters and leaves the barrel through the light inlet.

4. The battery inspection device according to claim 3, in, Inside the channel, the reflector is vertically arranged below the first lens connection hole and the beam splitter is vertically arranged below the second lens connection hole, and Wherein, the light inlet is vertically arranged below the beam splitter.

5. The battery inspection device according to claim 3, in, The light path guiding unit comprises: a mirror support configured to support and hold the reflective mirror; a beam splitter support configured to support and hold the beam splitter; and A groove through which the mirror support member and the beam splitter support member are inserted into the barrel portion from the outside.

6. The battery inspection device according to claim 1, in, The second lens module includes a telecentric lens.

7. The battery inspection device according to claim 1, in, The upper inspection unit comprises: A first lighting device is coupled to the first lens module.

8. The battery inspection device according to claim 7, in, The first lighting device is a coaxial projection lighting device.

9. The battery inspection device according to claim 1, in, The lower inspection unit comprises: A second lighting device coupled to the second lens module.

10. The battery inspection device according to claim 9, in, The second lighting device is a parallel light lighting device.

11. The battery inspection device according to claim 9, in, The lower inspection unit comprises: An aperture controller capable of controlling the amount of light entering the second lens module from the second lighting device.

12. The battery inspection device according to claim 11, in, The aperture controller comprises: an aperture unit, the aperture unit being mounted to the lighting connection hole provided on the second lens module for connecting the second lighting device, and the aperture unit being configured so that a gear provided on an outer surface rotates clockwise or counterclockwise to gradually increase or decrease a diameter of the aperture unit, thereby adjusting an amount of light entering the lighting connection hole; a motor bracket coupled to an outer side of the second lens module; a drive motor, the drive motor being fixed to the motor bracket; and A timing belt is connected to the drive motor and the gear.

Images