Battery Inspection Equipment

Abstract

A battery inspection device according to one embodiment of the present invention may include an upper inspection unit including a first lens module that focuses a first light and a first camera attached above the first lens module; a lower inspection unit that is arranged horizontally apart from the first lens module and includes a second lens module that focuses a second light incident from an object to be inspected and a second camera attached above the second lens module; and an optical path guide unit that is integrally coupled to the first lens module and the second lens module and configured to split the incident light incident from the object to be inspected into the first light and the 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 invention relates to an apparatus for inspecting the quality of batteries in the battery production process, and more particularly to an inspection apparatus for inspecting the quality of welded parts and assembled parts.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0173077 filed on December 12, 2022 and Korean Patent Application No. 10-2023-0174956 filed on December 5, 2023, and the contents disclosed in the specifications and drawings of those applications are incorporated herein in their entirety. [Background technology]

[0003] In the existing inspection device for welded parts of cylindrical batteries, as shown in FIG. 1, an endoscope lens 1 is inserted into the inside of a battery 20 to inspect the welded parts at the bottom.

[0004] When the inspection is performed using the above method, there is a drawback in that it is difficult to adapt to high production line speeds due to limitations on the lifting and lowering speed of the endoscopic lens 1. In addition, because the endoscopic lens 1 must be inserted into the battery 20, there is a problem in that the battery production process is forced to stop in the inspection section.

[0005] Incidentally, there was also the problem that the battery and the inspection device were damaged during the process of inserting the endoscope lens.

[0006] For this reason, there is a need for a new type of cylindrical battery welding inspection device that can inspect defects that occur during the welding process with improved image quality, instead of inspection devices such as an endoscope lens insertion method that hinders tact time and causes damage to the battery and inspection device. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was created in consideration of the above-mentioned circumstances, and its purpose is to provide an inspection device that can inspect the quality of batteries in the battery production process without stopping the production line, that does not cause damage to the product or the inspection device during the battery inspection process, and that can perform more accurate inspections.

[0008] Another object of the present invention is to provide an inspection device that can simultaneously inspect not only the welded portions of the lower part of a battery, but also the welded portions and the external appearance of the upper part.

[0009] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention given below. [Means for solving the problem]

[0010] A battery inspection device according to one embodiment of the present invention may include an upper inspection unit including a first lens module that focuses a first light and a first camera attached above the first lens module; a lower inspection unit that is arranged horizontally apart from the first lens module and includes a second lens module that focuses a second light and a second camera attached above the second lens module; and an optical path guide unit that is integrally coupled to the first lens module and the second lens module and configured to split incident light entering from an object to be inspected into the first light and the second light, and guide the first light to the first lens module and the second light to the second lens module.

[0011] The optical path guide unit may include a beam splitter that splits the incident light into the first light and the second light, and a reflecting mirror that refracts the first light so that the first light is directed toward the first lens module.

[0012] The optical path guide unit may include a box-shaped barrel section having an internal passage through which the first light and the second light pass, a first lens connection port disposed on the upper side of the barrel section and to which the first lens module is connected, a second lens connection port disposed on the upper side of the barrel section and to which the second lens module is connected, and a light entrance / exit port disposed on the lower side of the barrel section through which light enters and exits the interior and exterior of the barrel section.

[0013] Within the passage, the reflector may be positioned vertically below the first lens connection port, the beam splitter may be positioned vertically below the second lens connection port, and the light entrance / exit may be provided vertically below the beam splitter.

[0014] The optical path guide unit may include a mirror support that supports and holds the reflecting mirror, a splitter support that supports and holds the beam splitter, and a slot that allows the mirror support and the splitter support to be inserted from the outside to the inside of the lens barrel portion.

[0015] The second lens module may include a telecentric lens.

[0016] The upper inspection unit may include a first illuminator coupled to the first lens module.

[0017] The first illuminator may be a coaxial epi-illuminator.

[0018] The lower inspection unit may include a second illuminator coupled to the second lens module.

[0019] The second illuminator may be a collimated illuminator.

[0020] The lower inspection unit may include an aperture adjuster that can adjust the amount of light that enters the inside of the second lens module from the second illuminator.

[0021] The iris adjuster may include an iris portion that is attached to a lighting connection port provided on the second lens module so that the second illuminator can be connected, and that is configured to adjust the amount of light entering the lighting connection port by gradually widening or narrowing its diameter as a sawtooth portion provided on an outer surface rotates clockwise or counterclockwise; a motor bracket coupled to the outside of the second lens module; a drive motor fixedly coupled to the bracket; and a timing belt connected to the drive motor and the sawtooth portion. [Effects of the Invention]

[0022] According to one aspect of the present invention, in the battery production process, the quality of the battery can be inspected without stopping the production line, and there is no risk of damaging the product or the inspection device during the inspection of cylindrical batteries, and an inspection device that can perform more accurate inspections can be provided.

[0023] According to one aspect of the present invention, not only the welded points on the lower part of the battery but also the welded points on the upper part can be inspected simultaneously, making it possible to significantly shorten the tact time of the battery inspection process.

[0024] The effects of the present invention are not limited to the effects described above, and other effects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from this specification and the accompanying drawings.

[0025] The drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and serve to further understand the technical concepts of the present invention as well as the contents of the invention, and therefore the present invention should not be interpreted as being limited to the matters depicted in the drawings. Meanwhile, the shape, size, scale, or ratio of elements in the drawings attached to this specification may be exaggerated to emphasize a clearer description. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a diagram illustrating a battery testing device according to the prior art; [Figure 2] 1 is a perspective view of a battery testing device according to an embodiment of the present invention; [Figure 3] FIG. 3 is an exploded perspective view of the battery testing device of FIG. 2. [Figure 4] FIG. 3 is a schematic cross-sectional view of the battery testing device of FIG. 2. [Figure 5] FIG. 3 is a bottom view of the battery testing device of FIG. 2. [Figure 6] FIG. 3 is a left side view of the battery testing device of FIG. 2. [Figure 7] FIG. 3 is a front view of the battery inspection device of FIG. 2. [Figure 8] FIG. 3 is a right side view of the battery testing device of FIG. 2. [Figure 9] 3 is a diagram showing an aperture adjuster portion of the battery testing device of FIG. 2. FIG. [Figure 10] 1 is a schematic cutaway view of a battery for testing by a battery testing device according to an embodiment of the present invention; [Figure 11] 10 is a diagram showing the inspection light path on the top of the battery when the top area of the battery is imaged by an upper inspection unit according to one embodiment of the present invention. FIG. [Figure 12] 10A and 10B are diagrams illustrating the inspection light paths at the bottom of a battery when imaging the lower area of the battery with a lower inspection unit according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and claims should not be construed as being limited to their ordinary or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor can appropriately define the concepts of terms himself / herself in order to best describe the invention. Therefore, it should be understood that the embodiment described in this specification and the configurations shown in the drawings are merely a preferred embodiment of the present invention and do not represent the entire technical ideas of the present invention, and therefore various equivalents and modifications that can be substituted therefor may exist at the time of filing this application.

[0028] A battery inspection device according to an embodiment of the present invention can inspect the quality of a battery by photographing an upper region and a lower region of the battery during the battery production process.

[0029] As will be described in more detail below, a battery inspection device according to one aspect of the present invention is configured to simultaneously acquire images of the upper and lower sides of a battery 20 as the battery 20 moves along a battery production line, thereby inspecting the conditions of the upper and lower sides of the battery. Therefore, the quality of the battery can be inspected without stopping the production line during the battery production process, thereby reducing the takt time of the battery production process. Furthermore, compared to the endoscopic inspection method described in the Background section above, the battery inspection device according to one aspect of the present invention is configured to acquire images of the lower side of the interior of the battery from outside the battery, eliminating the risk of interference or collision between the battery inspection device and the battery.

[0030] The main components of the battery testing device according to one aspect of the present invention will be described in detail below.

[0031] FIG. 2 is a perspective view of a battery testing device according to one embodiment of the present invention, FIG. 3 is an exploded perspective view of the battery testing device of FIG. 2, and FIG. 4 is a schematic cross-sectional view of the battery testing device of FIG.

[0032] As shown in FIGS. 2 to 4, a battery testing apparatus according to an embodiment of the present invention may include an upper testing unit 100, a lower testing unit 200, and a light path guide unit 300.

[0033] The upper inspection unit 100 and the lower inspection unit 200 may be configured to photograph different portions of an object to be inspected. For example, the upper inspection unit 100 may be configured to photograph an upper region of a battery 20 as an object to be inspected to inspect whether it is good or bad, and the lower inspection unit 200 may be configured to photograph a lower region inside the battery as an object to be inspected to inspect whether it is good or bad.

[0034] The upper inspection unit 100 may include a first lens module 110 that focuses first light incident from the object to be inspected, and a first camera 120 that is detachably coupled to the first lens module 110. The first lens module 110 may include a generally cylindrical lens barrel and at least one lens 111 provided inside the lens barrel.

[0035] The first camera 120 is a means for acquiring and storing an image of an object to be inspected. In this embodiment, the first camera 120 acquires and stores an image of a welding point on the upper side of a battery. The first camera 120 may be, for example, a charge-coupled device (CCD) camera that uses a CCD as an image sensor to convert an image into an electrical signal and store the signal as digital data in a storage medium such as a flash memory.

[0036] The lower inspection unit 200 may include a second lens module 210 that focuses second light incident from the object under inspection and a second camera 220 that is detachably coupled to the second lens module 210. The second lens module 210 may include a generally cylindrical lens barrel and at least one lens 211 disposed inside the lens barrel. In particular, in this embodiment, the lens constituting the second lens module 210 may be a telecentric lens. Here, the telecentric lens refers to a lens designed to capture parallel light regardless of the parallel distance. Such a telecentric lens receives only light parallel to its optical axis, eliminating perspective errors and enabling more accurate inspection of weld thickness, even for welds on the lower side of a battery.

[0037] The second camera 220 is a means for capturing and storing an image of the object under inspection, similar to the first camera 120, and may be, for example, a CCD camera. However, the second camera 220 captures and stores an image of a different part of the object under inspection compared to the first camera 120. For example, in this embodiment, the first camera 120 captures and stores an image of an upper area of a battery, and the second camera 220 captures and stores an image of a lower area inside the battery.

[0038] The optical path guide unit 300 may be configured to split incident light from an object to be inspected into a first light and a second light, guide the first light to the first lens module 110, and guide the second light to the second lens module 210.

[0039] To this end, the optical path guide unit 300 according to this embodiment may include a beam splitter 320 and a reflecting mirror 330. Here, the beam splitter 320 refers to an optical device that splits a light beam into two or more beams. In this embodiment, the beam splitter 320 may be configured to split incident light from an object under inspection into a first light and a second light. In other words, the first light is reflected light from the beam splitter 320, and the second light is transmitted light from the beam splitter 320. The beam splitter 320 may be configured to reflect, for example, approximately 50% of the incident light and transmit approximately 50% of the incident light.

[0040] The beam splitter 320 may be disposed vertically above the object under inspection, 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 toward the second lens module 210. However, the first light is reflected from the beam splitter 320 and travels in the horizontal direction (-Y direction), and therefore cannot be guided to the first lens module 110 unless the optical path is switched.

[0041] The reflector 330 is a means for switching the optical path of the first light, and may be positioned vertically below the first lens module 110 so that the first light reflected from the beam splitter 320 is directed to the first lens module 110.

[0042] 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 horizontally spaced apart from each other. For example, by making the focus distance (or working distance) of the first lens module 110 and the focus distance of the second lens module 210 different from each other, different regions of one inspection object can be simultaneously inspected using the first lens module 110 and the second lens module 210.

[0043] The optical path guide unit 300 may be integrally coupled to the first lens module 110 and the second lens module 210 .

[0044] Specifically, referring mainly to FIGS. 3 to 5, the optical path guide unit 300 may include a lens barrel portion 310, a first lens connection port 311, a second lens connection port 312, and a light entrance / exit port 313.

[0045] The lens barrel 310 may have a generally box-like shape and include passages therein through which the first light and the second light pass.

[0046] 3, the first lens connection port 311 and the second lens connection port 312 may be respectively disposed on the upper side of the lens barrel part 310. The lower end of the first lens module 110 may be fitted and fixed in the first lens connection port 311, and the lower end of the second lens module 210 may be fitted and fixed in the second lens connection port 312.

[0047] In this case, as shown in FIG. 4, the lens at the lower end of the first lens module 110 faces the inside of the lens barrel portion 310 via the first lens connection port 311, and the lens at the lower end of the second lens module 210 faces the inside of the lens barrel portion 310 via the second lens connection port 312.

[0048] The light entrance / exit 313 may be disposed on the lower side of the lens barrel 310. Light incident from an object to be inspected may enter the interior of the lens barrel 310 through the light entrance / exit 313. In addition, as will be described later, illumination light for brightly illuminating the object to be inspected may exit from the interior of the lens barrel 310 to the outside through the light entrance / exit 313.

[0049] In this embodiment, the beam splitter 320 and the reflecting mirror 330 are disposed inside the passage S of the lens barrel 310. Specifically, the beam splitter 320 may be disposed vertically below the second lens connection port 312, as shown in Fig. 4. The light entrance / exit port 313 may be located vertically below the beam splitter 320.

[0050] The beam splitter 320 is plate-shaped and may be mounted inside the passage of the barrel 310 so that the plate surface forms an angle of approximately 45° with the horizontal plane in a clockwise direction. Light incident through the light entrance / exit 313 may be reflected from the beam splitter 320 and may also be transmitted through the beam splitter 320. That is, in the case of the plate-shaped beam splitter 320 shown in FIG. 4 , a portion of the light that enters the barrel 310 vertically through the light entrance / exit 313 may be reflected by the plate-shaped beam splitter 320 and bent to the left at an angle of 90°, thereby switching its optical path horizontally, and the remaining portion may be transmitted through the plate-shaped beam splitter 320 and travel straight toward the second lens connection port 312. Here, of the light split into two by the beam splitter 320, the light that is reflected by the beam splitter 320 and has its optical path switched corresponds to the first light, and the light that passes through the beam splitter 320 corresponds to the second light. Meanwhile, although the beam splitter 320 in this embodiment is plate-shaped, the beam splitter 320 may be replaced with a cube-shaped one.

[0051] The reflecting mirror 330 may be disposed horizontally apart from the beam splitter 320 and vertically below the first lens connection port 311. The reflecting mirror 330 may be assembled inside the passage of the lens barrel portion 310 so as to form an angle of approximately 45° with the horizontal plane in the clockwise direction.

[0052] The reflecting mirror 330 changes the traveling direction of the first light beam, which is reflected from the beam splitter 320 and travels horizontally, to a vertical direction. Therefore, the first light beam is reflected from the reflecting mirror 330, and its traveling direction is changed to the direction of the first lens connection port 311, so that the first light beam can be incident on the first lens module 110.

[0053] Meanwhile, the beam splitter 320 and the reflecting mirror 330 may be installed in the lens barrel 310 so as to be insertable into and removable from the lens barrel 310 .

[0054] For example, the optical path guide unit 300 according to this embodiment may include a mirror support 331 that supports and holds the reflecting mirror 330, and a splitter support 321 that supports and holds the beam splitter 320, and may be configured to have slots that allow the mirror support 331 and the splitter support 321 to be inserted from the outside to the inside of the lens barrel portion 310.

[0055] For example, as shown in Fig. 4, the lens barrel 310 may include a first fitting slot 315 on its left side into which the mirror support 331 can be fitted. The mirror support 331 may be configured to be fitted from the outside to the inside of the lens barrel 310 through the first fitting slot 315. After the mirror support 331 is fitted into the lens barrel 310, the entrance of the first fitting slot 315 may be covered by a first slot cover plate 316, as shown in Fig. 6.

[0056] The lens barrel 310 may also include a second insertion slot (not shown) on the right front portion into which the splitter support 321 can be inserted. The second insertion slot may be formed in a direction from the front to the rear of the lens barrel 310 (±X direction). The splitter support 321 may be configured to be inserted from the outside to the inside of the lens barrel 310 through the second insertion slot. After the splitter support 321 is inserted into the lens barrel 310, the entrance of the second insertion slot may be covered by a second slot cover plate 314, as shown in FIG. 7.

[0057] With this configuration, the beam splitter 320 and the reflecting mirror 330 can be easily placed in or removed from the lens barrel 310. Furthermore, if necessary, the reflecting mirror 330 or the beam splitter 320 can be easily replaced with one having different properties such as an inclination angle, reflectance, or transmittance.

[0058] Returning to FIGS. 2 and 3, the battery testing apparatus according to an embodiment of the present invention may further include an illuminator to obtain a bright image from the object under test.

[0059] The upper inspection unit 100 includes a first illuminator 130, and the first illuminator 130 and the first lens module 110 may be configured to be combinable with each other. The first lens module 110 may include an illumination attachment / detachment unit 113 to which the first illuminator 130 can be attached on one side of a lens barrel, and may be configured to be coupled to the first illuminator 130. In this embodiment, the first illuminator 130 may be a coaxial epi-illuminator.

[0060] The lower inspection unit 200 includes a second illuminator 230, and the second illuminator 230 and the second lens module 210 may be configured to be combinable with each other. The second lens module 210 may include an illumination connection port on one side of a lens barrel to which the second illuminator 230 can be attached, thereby allowing the second illuminator 230 to be coupled. In this embodiment, the second illuminator 230 may be a parallel light illuminator.

[0061] In particular, the lower inspection unit 200 may further include an aperture adjuster 240 that can adjust the amount of light that enters the inside of the second lens module 210 from the second illuminator 230 .

[0062] As shown in FIG. 9, the aperture adjuster 240 may include an aperture portion 241, a motor bracket 242, a drive motor 243, and a timing belt 244.

[0063] The aperture portion 241 is attached to a lighting connection port (not shown) provided on the second lens module 210 so that the second illuminator 230 can be connected, and can be configured such that the diameter gradually widens or narrows when the sawtooth portion 241a provided on the outer surface rotates clockwise or counterclockwise to adjust the amount of light entering the lighting connection port.

[0064] The motor bracket 242 is fixedly coupled to the second lens module 210 and may be provided in a plate shape to which a driving motor 243 can be attached.

[0065] The driving motor 243 may include a body fixedly coupled to the motor bracket 242 and a shaft 243a that rotates in forward and reverse directions. The shaft 243a of the driving motor and the sawtooth portion 241a of the restrictor may be connected by a timing belt 244.

[0066] As described above, since the lower inspection unit 200 includes the aperture adjuster 240, it is not only possible to automatically adjust the amount of illumination light, but also possible to precisely adjust the amount of illumination light by adjusting the rotation speed of the drive motor 243.

[0067] Meanwhile, the battery testing apparatus according to an embodiment of the present invention may further include a device bracket 400. Referring to FIGS. 2 to 3 and 8, the device bracket 400 may be coupled to the second lens module 210 and the optical path guide unit 300. The device bracket 400 may be coupled to a conveying device (not shown) that is movable in three axial directions (X, Y, and Z). In this case, the battery testing apparatus can move up and down, left and right, and front and back relative to the object to be tested.

[0068] Next, a brief description will be given of an inspection process for the upper region 21 and the lower region 22 of a cylindrical battery that can be performed by a battery inspection device according to one embodiment of the present invention, with reference to FIGS.

[0069] In this embodiment, the cylindrical battery 20 to be inspected is a tabless cylindrical secondary battery, and as shown in FIG. 10 , the cylindrical battery 20 has a center hole H at the center of the electrode assembly 23. The center hole H is formed at the location where a winding rod (not shown) was located when the winding rod (not shown) was removed after the electrode assembly was wound around the winding rod. A positive terminal 25 disposed at the lower interior of the cylindrical battery may be welded to a positive current collector 27. This welding may be performed by inserting a welding rod or irradiating a laser beam into the center hole H of the electrode assembly 23. The cylindrical battery 20 also has a negative current collector 26 in its upper region. The peripheral edge of the negative current collector 26 may be welded to the inner wall of the battery can, and its lower surface may be welded to the negative uncoated portion.

[0070] In this embodiment, the area to be inspected by the lower inspection unit 200 of the battery inspection device may be the lower area 22 inside the battery where the positive terminal 25 and the positive current collector 27 are welded together. The area to be inspected by the upper inspection unit 100 of the battery inspection device may be the upper area 21 of the battery where the negative current collector 26 is assembled.

[0071] During the battery production process, the cylindrical battery 20 may be transported by a transport device such as a conveyor. A battery inspection device according to one aspect of the present invention can capture images of the cylindrical battery 20 being transported at high speed during the battery production process to obtain images of the area to be inspected.

[0072] The upper inspection unit 100 of the battery inspection device photographs an upper region 21 of a cylindrical battery, and the lower inspection unit 200 photographs a lower region 22 inside the cylindrical battery. To this end, the first lens module 110 and the second lens module 210 may have different focus distances (working distances).

[0073] For example, in this embodiment, the first lens module 110 may be set to have a focus distance from its lower lens to the surface of the upper region 21 of the cylindrical battery to be observed. In this case, the image of the upper region 21 of the cylindrical battery can be clearly observed through the first lens module 110. Also, in this embodiment, the second lens module 210 may be set to have a focus distance from its lower lens to the surface of the lower region 22 of the interior of the cylindrical battery to be observed. In this case, the image of the lower region 22 of the interior of the cylindrical battery can be clearly observed through the second lens module 210.

[0074] The battery inspection device is positioned above the cylindrical battery 20 and photographs each cylindrical battery being transported to inspect its quality. Specifically, when the cylindrical battery 20 being transported is positioned below the light entrance 313 of the light path guide unit 300, the first illuminator 130 is turned on and the first camera 120 captures an image of the upper region 21 of the cylindrical battery. At this time, as shown in FIG. 11 , incident light L entering the light entrance 313 from the upper region 21 of the cylindrical battery is split into a first light L1 and a second light L2 by the beam splitter 320, and the first light L1 passes through the reflector 330 and is directed to the image sensor of the first camera 120 via the first lens module 110, thereby capturing an image of the upper region 21 of the cylindrical battery.

[0075] The second illuminator 230 of the lower inspection unit 200 may be turned on with a very short time difference from the first illuminator 130. When the second illuminator 230 is turned on, the first illuminator 130 may be turned off. When the second illuminator 230 is turned on, the second camera 220 captures an image of the lower region 22 inside the cylindrical battery. At this time, as shown in FIG. 12 , incident light L entering the light port 313 from the lower region 22 inside the cylindrical battery is split into a first light L1 and a second light L2 by the beam splitter 320, and the second light L2 is directed to the image sensor of the second camera 220 via the second lens module 210 to capture an image of the lower region 22 inside the cylindrical battery.

[0076] 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 inside the cylindrical battery at a very high speed, so that they can be said to proceed substantially simultaneously. Therefore, in the battery production process, images of the upper region 21 and the lower region 22 of the cylindrical battery can be acquired without stopping the production line, and the welding quality of the relevant parts can be inspected.

[0077] Although the present invention has been described above using limited embodiments and drawings, it goes without saying that the present invention is not limited to these, and that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the appended claims.

[0078] Furthermore, although directional terms such as up, down, left, and right are used in this specification, it will be obvious to those skilled in the art of the present invention that these terms are used merely for ease of explanation and may differ depending on the position of the object in question, the position of the observer, etc.

[0079] Although the present invention has been described above using limited embodiments and drawings, it goes without saying that the present invention is not limited to these, and that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the appended claims. [Explanation of symbols]

[0080] 1 Endoscope lens 20 Cylindrical battery 20 Battery 21 Upper Area 22 Lower Area 23 Electrode assembly 25 Positive terminal 26 Negative electrode current collector 27 Positive electrode current collector 100+ Inspection Units 110 first lens module 111 Lens 113 Lighting attachment / detachment part 120 First Camera 130 First Illuminator 200 Lower Inspection Unit 210 Second Lens Module 211 Lens 220 Second Camera 230 Second Illuminator 240 Regulator 241 Constriction section 241a Sawtooth part 242 Motor bracket 243 Drive motor 243a Shaft 244 Timing Belt 300 Optical path guide unit 310 Telescope tube 311 First lens connection port 312 Second lens connection port 313 Light entrance / exit 314 Second slot cover plate 315 First Insertion Slot 316 First slot cover plate 320 Beam Splitter 321 Splitter support 330 Reflector 331 Mirror support 400 Device Bracket

Claims

1. an upper inspection unit including a first lens module that focuses a first light and a first camera attached to an upper side of the first lens module; a lower inspection unit including a second lens module arranged horizontally apart from the first lens module and configured to focus a second light, and a second camera attached to an upper side of the second lens module; an optical path guide unit that is integrally coupled to the first lens module and the second lens module, and is configured to split 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; 12. A battery testing device comprising:

2. The optical path guide unit includes:

2. The battery testing device of claim 1, further comprising: a beam splitter that splits the incident light into the first light and the second light; and a reflector that refracts the first light so that the first light is directed toward the first lens module.

3. The optical path guide unit includes: a barrel portion provided in a box shape and including passages through which the first light and the second light pass; a first lens connection port disposed on an upper side of the lens barrel portion and connected to the first lens module; a second lens connection port disposed on an upper side of the lens barrel portion and connected to the second lens module; a light entrance / exit point disposed below the lens barrel portion and through which light passes between the inside and outside of the lens barrel portion; The battery testing device of claim 2 , comprising:

4. Within the passage, the reflecting mirror is disposed vertically below the first lens connection port, and the beam splitter is disposed vertically below the second lens connection port, The battery testing device according to claim 3 , wherein the light entrance / exit is provided vertically below the beam splitter.

5. The optical path guide unit includes: a mirror support that supports and holds the reflecting mirror; a splitter support that supports and holds the beam splitter; a slot into which the mirror support and the splitter support can be inserted from the outside to the inside of the lens barrel; The battery testing device according to claim 3 , comprising:

6. The battery testing apparatus of claim 1 , wherein the second lens module includes a telecentric lens.

7. The upper inspection unit is The battery testing apparatus of any one of claims 1 to 5, further comprising a first illuminator coupled to the first lens module.

8. 8. The battery testing apparatus of claim 7, wherein the first illuminator is a coaxial epi-illuminator.

9. The lower inspection unit includes: The battery testing apparatus of any one of claims 1 to 5, further comprising a second illuminator coupled to the second lens module.

10. 10. The battery testing apparatus of claim 9, wherein the second illuminator is a collimated illuminator.

11. The lower inspection unit includes:

10. The battery testing device of claim 9, further comprising an aperture adjuster that adjusts the amount of light that enters the second lens module from the second illuminator.

12. The aperture adjuster is an aperture part that is attached to the lighting connection port provided on the second lens module so that the second illuminator can be connected, and that has a sawtooth part provided on an outer surface thereof that gradually widens or narrows in diameter as the sawtooth part rotates clockwise or counterclockwise to adjust the amount of light entering the lighting connection port; a motor bracket coupled to an outer side of the second lens module; a drive motor fixedly coupled to the motor bracket; a timing belt connected to the drive motor and the sawtooth portion; 12. The battery testing device of claim 11, comprising:

Images