Battery testing device

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 a battery in the production process of the battery, and more particularly, to an inspection apparatus for inspecting the quality of welding points and assembly points.

[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 all the contents disclosed in the specifications and drawings of the applications are incorporated herein by reference.

Background Art

[0003] As shown in FIG. 1, an existing inspection apparatus for welding points of a cylindrical battery inserts an endoscope lens 1 into the interior of the battery 20 to inspect the welding points at the lower part.

[0004] When conducting inspections by the above method, there is an aspect that it is difficult to cope with a high production line speed due to the limits of the rising and falling speeds of the endoscope lens 1. In addition, since the endoscope lens 1 must be inserted into the interior of the battery 20, there is a problem that the product is forced to stop in the inspection section during the production process of the battery.

[0005] Incidentally, there is also a problem that the battery and the inspection apparatus are damaged during the insertion process of the endoscope lens.

[0006] For this reason, instead of an inspection apparatus such as an endoscope lens insertion method that inhibits tact time and causes damage to the battery and the inspection apparatus, a new type of welding inspection apparatus for a cylindrical battery that can inspect defects occurring in the welding process with improved video quality is desired.

Summary of the Invention

Problems to be Solved by the Invention

[0007] This invention was created in view of the circumstances described above, 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 risk damaging the product or the inspection device during the battery inspection process, and that can perform inspections with even greater accuracy.

[0008] Another object of the present invention is to provide an inspection device that can simultaneously inspect not only the welds at the bottom of a battery, but also the welds at the top or the overall appearance.

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

[0010] A battery inspection device according to one aspect of the present invention may include: an upper inspection unit including a first lens module for focusing first light and a first camera mounted above the first lens module; a lower inspection unit including a second lens module positioned horizontally apart from the first lens module for focusing second light and a second camera mounted above the second lens module; and an optical path guide unit integrally coupled to the first lens module and the second lens module, configured to split incident light entering from an object to be inspected into first light and second light, guide the first light to the first lens module and guide 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 a first light and a second light, and a reflector 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 lens barrel section having a passage through which the first light and the second light pass; a first lens connection port located on the upper side of the lens barrel section and to which the first lens module is connected; a second lens connection port located on the upper side of the lens barrel section and to which the second lens module is connected; and a light inlet / outlet located on the lower side of the lens barrel section through which light enters and exits the inside and outside of the lens 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 inlet / outlet may be provided vertically below the beam splitter.

[0014] The optical path guide unit may include a mirror support for supporting and holding the reflecting mirror, a splitter support for supporting and holding the beam splitter, and slots into which the mirror support and the splitter support can be fitted from the outside to the inside of the lens barrel.

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

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

[0017] The first illuminator described above may be a coaxial incident illuminator.

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

[0019] The second illuminator may be a parallel light illuminator.

[0020] The lower inspection unit may include an aperture adjuster capable of adjusting the amount of light entering the interior of the second lens module from the second illuminator.

[0021] The aperture adjuster may include an aperture section mounted on a lighting connection port provided on the second lens module to which the second illuminator is connected, and configured such that the diameter gradually widens or narrows as the sawtooth section provided on its outer surface rotates clockwise or counterclockwise to adjust the amount of light entering the lighting connection port; 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 section. [Effects of the Invention]

[0022] According to one aspect of the present invention, in the battery production process, it is possible to provide an inspection device that can inspect the quality of batteries without stopping the production line, eliminates the risk of damaging the product or the inspection device during the inspection of cylindrical batteries, and enables more accurate inspection.

[0023] According to one aspect of the present invention, it is possible to inspect not only the welded area at the bottom of the battery but also the welded area at the top simultaneously, thereby significantly shortening the cycle time of the battery inspection process.

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

[0025] The drawings accompanying this specification illustrate preferred embodiments of the present invention and serve to further illustrate the technical idea of ​​the invention along with its content; therefore, the present invention is not to be construed as being limited solely to what is depicted in the drawings. On the other hand, the shapes, sizes, scales, or ratios of elements in the drawings accompanying this specification may be exaggerated to emphasize a clearer explanation. [Brief explanation of the drawing]

[0026] [Figure 1] FIG. is a diagram schematically showing a battery inspection apparatus according to the prior art. [Figure 2] FIG. is a perspective view of a battery inspection apparatus according to an embodiment of the present invention. [Figure 3] FIG. is an exploded perspective view of the battery inspection apparatus of FIG. 2. [Figure 4] FIG. is a schematic cross-sectional view of the battery inspection apparatus of FIG. 2. [Figure 5] FIG. is a bottom view of the battery inspection apparatus of FIG. 2. [Figure 6] FIG. is a left side view of the battery inspection apparatus of FIG. 2. [Figure 7] FIG. is a front view of the battery inspection apparatus of FIG. 2. [Figure 8] FIG. is a right side view of the battery inspection apparatus of FIG. 2. [Figure 9] FIG. is a diagram showing a portion of an aperture adjuster of the battery inspection apparatus of FIG. 2. [Figure 10] FIG. is a schematic cutaway view of a battery to be inspected by a battery inspection apparatus according to an embodiment of the present invention. [Figure 11] FIG. is a diagram showing an inspection optical path of an upper region of a battery when imaging the upper region of the battery by an upper inspection unit according to an embodiment of the present invention. [Figure 12] FIG. is a diagram showing an inspection optical path of a lower region of a battery when imaging the lower region of the battery by a lower inspection unit according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] Preferred embodiments of the present invention will now be described in detail based on the accompanying drawings. Prior to this, terms and words used in this specification and in the claims are not to be interpreted in their ordinary or dictionary sense, but rather in accordance with the principle that inventors may appropriately define the concepts of terms to best describe their invention, and are to be interpreted in a sense corresponding to the technical idea of ​​the present invention. Therefore, the embodiments described herein and the configurations shown in the drawings represent only preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention; it should be understood that there are various equivalents and modifications that can be substituted for them at the time of this application.

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

[0029] As will be described in more detail later, 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 it moves along a battery production line, thereby enabling inspection of the condition of the upper and lower sides of the battery. Therefore, in the battery production process, the quality of the battery can be inspected without stopping the production line, thereby shortening the cycle time of the battery production process. Furthermore, compared to the endoscopic inspection method described in the background technology section above, the battery inspection device according to one aspect of the present invention is configured to acquire images of the lower inside of the battery from outside the battery, so there is no risk of interference or collision between the battery inspection device and the battery.

[0030] The following describes in detail the main components of a battery inspection device according to one embodiment of the present invention.

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

[0032] As shown in Figures 2 to 4, a battery inspection device according to one embodiment of the present invention may include an upper inspection unit 100, a lower inspection unit 200, and an optical path guide unit 300.

[0033] The upper inspection unit 100 and the lower inspection unit 200 may be configured to photograph different parts of a single object to be inspected. For example, the upper inspection unit 100 may be configured to photograph the upper region of the battery 20, which is the object to be inspected, to check for quality, and the lower inspection unit 200 may be configured to photograph the lower region inside the battery, which is the object to be inspected, to check for quality.

[0034] The above inspection unit 100 may include a first lens module 110 that focuses first light incident from an 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 saving images of the object to be inspected. In this embodiment, the first camera 120 acquires and saves images of the welding area on the upper side of the battery. The first camera 120 may be a CCD camera that can save digital data to a storage medium such as flash memory by converting images into electrical signals using a charge-coupled device (CCD) as an image sensor.

[0036] The lower inspection unit 200 may include a second lens module 210 that focuses second light incident from the object to be inspected, and a second camera 220 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 provided inside the lens barrel. In particular, in this embodiment, the lens constituting the second lens module 210 may be a telecentric lens. Here, a telecentric lens is a lens designed to capture parallel light regardless of parallel distance. Since such a telecentric lens receives only optical axes parallel to the optical axis, there is no perspective error, and therefore, even if it is a welding point on the underside of the inside of a battery, the welding thickness and other details can be inspected with greater accuracy.

[0037] The second camera 220, like the first camera 120, is a means for acquiring and storing images of the object under inspection, and may be, for example, a CCD camera. However, compared to the first camera 120, the second camera 220 acquires and stores images of other parts of the object under inspection. For example, in this embodiment, the first camera 120 acquires and stores images of the upper area of ​​the battery, and the second camera 220 acquires and stores images of the lower area inside the battery.

[0038] The optical path guide unit 300 may be configured to split the incident light entering from the 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] For this purpose, the optical path guide unit 300 according to this embodiment may include a beam splitter 320 and a reflector 330. Here, the beam splitter 320 means an optical device that splits a light ray into two or more beams. In this embodiment, the beam splitter 320 may be configured to split incident light coming from the object to be inspected into a first beam and a second beam. In other words, the first beam is reflected light from the beam splitter 320, and the second beam is transmitted light from the beam splitter 320. The beam splitter 320 may be configured, for example, to reflect about 50% of the incident light and transmit about 50% of the incident light.

[0040] The beam splitter 320 is positioned vertically above the object to be inspected, and the second lens module 210 may be positioned vertically above such a beam splitter 320. In this case, the second light can immediately enter the second lens module 210. However, the first light is reflected from the beam splitter 320 and travels horizontally (-Y direction), so it 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 guided to the first lens module 110.

[0042] With this configuration, light incident from the object to be inspected can be guided to the first lens module 110 and the second lens module 210, which are separated from each other in the horizontal direction. 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, it becomes possible to simultaneously inspect different areas of a single object using the first lens module 110 and the second lens module 210.

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

[0044] Specifically, referring mainly to Figures 3 to 5, the optical path guide unit 300 may include a lens barrel 310, a first lens connection port 311, a second lens connection port 312, and an optical inlet / outlet 313.

[0045] The lens barrel portion 310 may be provided in a generally box-like shape and may have a passage inside through which the first light and the second light pass.

[0046] The first lens connection port 311 and the second lens connection port 312 can be positioned on the upper side of the lens barrel portion 310, as shown in Figure 3. The lower end of the first lens module 110 can be fitted and fixed into the first lens connection port 311, and the lower end of the second lens module 210 can be fitted and fixed into the second lens connection port 312.

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

[0048] The light inlet / outlet 313 may be located on the lower side of the lens barrel 310. Light incident from the object to be inspected can enter the interior of the lens barrel 310 through the light inlet / outlet 313. Also, as will be described later, illumination light for brightly illuminating the object to be inspected can exit the interior of the lens barrel 310 to the outside through the light inlet / outlet 313.

[0049] In this embodiment, the beam splitter 320 and the reflector 330 are arranged inside the passage S of the lens barrel 310. Specifically, the beam splitter 320 may be positioned vertically below the second lens connection port 312, as shown in Figure 4. The light inlet / outlet 313 may be located vertically below the beam splitter 320.

[0050] The beam splitter 320 is provided in the shape of a plate and can be assembled inside the passage of the lens barrel 310 such that the plate surface forms an angle of approximately 45° with the horizontal plane in a clockwise direction. Light incident through the light inlet / outlet 313 can be reflected from the beam splitter 320 and can also be transmitted through the beam splitter 320. That is, in the case of a plate-shaped beam splitter 320 as shown in Figure 4, some of the light that enters the inside of the lens barrel 310 vertically through the light inlet / outlet 313 can be reflected by the plate-shaped beam splitter 320 and bent to the left at an angle of 90°, switching the optical path in the horizontal direction, while the remaining part can 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 reflected from the beam splitter 320 and whose optical path is switched corresponds to the first light, and the light transmitted through the beam splitter 320 corresponds to the second light. On the other hand, although the beam splitter 320 in this embodiment is plate-shaped, the beam splitter 320 can also be replaced with a cube-shaped beam splitter.

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

[0052] Such a reflector 330 switches the direction of propagation of the first light, which is reflected from the beam splitter 320 and travels horizontally, to a vertical direction. Therefore, the first light is reflected from the reflector 330, its direction of propagation is switched to the direction of the first lens connection port 311, and it can be incident on the first lens module 110.

[0053] On the other hand, the beam splitter 320 and the reflecting mirror 330 may be provided so as to be able to be fitted into and removed from the lens barrel portion 310.

[0054] For example, the optical path guide unit 300 according to this embodiment includes 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 the mirror support 331 and the splitter support 321 may each be configured to have slots into which they can be fitted from the outside to the inside of the lens barrel portion 310.

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

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

[0057] With this configuration, the beam splitter 320 and the reflector 330 can be easily placed inside the lens barrel 310 or removed from the lens barrel 310. Furthermore, the reflector 330 or beam splitter 320 can be easily replaced with one having different characteristics such as tilt angle, reflectance, and transmittance, as needed.

[0058] Returning to Figures 2 and 3, the battery inspection apparatus according to one embodiment of the present invention may further include an illuminator to obtain a bright image from the object to be inspected.

[0059] The aforementioned 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 section 113 on one side of the lens barrel to which the first illuminator 130 can be attached, and may be configured to be connectable with the first illuminator 130. In this embodiment, the first illuminator 130 may be a coaxial incident 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 be configured to be connectable to the second illuminator 230 by including an illumination connection port on one side of the lens barrel to which the second illuminator 230 can be mounted. 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 entering the second lens module 210 from the second illuminator 230.

[0062] The aperture adjuster 240 may include an aperture section 241, a motor bracket 242, a drive motor 243, and a timing belt 244, as shown in Figure 9.

[0063] The aperture portion 241 may be mounted on an illumination connection port (not shown) provided in the second lens module 210 to which the second illuminator 230 is connected, and the serrated portion 241a provided on its outer surface may be configured such that the diameter gradually widens or narrows as it rotates clockwise or counterclockwise, thereby adjusting the amount of light entering the illumination 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 the drive motor 243 can be assembled.

[0065] The drive 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 drive motor and the sawtooth portion 241a of the throttling section may be connected by a timing belt 244.

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

[0067] On the other hand, a battery inspection device according to one embodiment of the present invention may further include a device bracket 400. Referring to Figures 2-3 and 8, the device bracket 400 may be coupled to the second lens module 210 and the optical path guide unit 300. Such a device bracket 400 may be coupled to a transport device (not shown) that is movable in three axes (X, Y, Z). In this case, the battery inspection device is movable in the vertical, horizontal, and front-to-back directions relative to the object to be inspected.

[0068] Next, a brief explanation will be given of the inspection process for the upper region 21 and lower region 22 of a cylindrical battery that can be performed by a battery inspection device according to one embodiment of the present invention, based on Figures 10 to 12.

[0069] In this embodiment, the cylindrical battery 20 to be inspected is a tabless cylindrical secondary battery, and as shown in Figure 10, has a central hole H in the center of the electrode assembly 23. The central hole H formed in the center of the electrode assembly 23 is a hole formed in the part where the winding rod (not shown) was located during the process of removing the winding rod (not shown) after winding the electrode assembly onto it. Welding can be performed between the positive electrode terminal 25 and the positive electrode current collector 27, which are located on the lower side inside the cylindrical battery. At this time, welding can be performed by inserting a welding rod into the central hole H of the electrode assembly 23 or by irradiating it with a laser beam. The cylindrical battery 20 also has a negative electrode current collector 26 in the upper region. The peripheral portion of the negative electrode current collector 26 can be welded to the inner wall surface of the battery can, and its lower surface can be welded to the negative electrode blank 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 region 22 inside the battery where the positive electrode terminal 25 and the positive electrode current collector 27 are welded. The area to be inspected by the upper inspection unit 100 of the battery inspection device may be the upper region 21 of the battery where the negative electrode current collector 26 is assembled.

[0071] In the battery production process, the cylindrical battery 20 may be transported by a conveying device such as a conveyor. A battery inspection device according to one aspect of the present invention can capture images of the parts to be inspected by rapidly photographing the cylindrical battery 20 while it is being transported during the battery production process.

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

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

[0074] The battery inspection device is positioned above the cylindrical battery 20 to photograph each cylindrical battery during transport and inspect its quality. Specifically, when the cylindrical battery 20 being transported is positioned below the light inlet / outlet 313 of the optical path guide unit 300, the first illuminator 130 is turned on, and the first camera 120 acquires an image of the upper region 21 of the cylindrical battery. At this time, as shown in Figure 11, the incident light L entering the light inlet / outlet 313 from the upper region 21 of the cylindrical battery is split into a first light L1 and a second light L2 in the beam splitter 320, and the first light L1 is connected to the image sensor of the first camera 120 via the reflector 330 and the first lens module 110, thereby acquiring an image of the upper region 21 of the cylindrical battery.

[0075] The second illuminator 230 of the lower inspection unit 200 can 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 can be turned off. When the second illuminator 230 is turned on, the second camera 220 acquires an image of the lower region 22 inside the cylindrical battery. At this time, as shown in Figure 12, the incident light L entering the light inlet / outlet 313 from the lower region 22 inside the cylindrical battery is split into a first light L1 and a second light L2 in the beam splitter 320, and the second light L2 is connected to the image sensor of the second camera 220 via the second lens module 210, so that an image of the lower region 22 inside the cylindrical battery can be acquired.

[0076] The imaging of the upper region 21 of the cylindrical battery by the upper inspection unit 100 and the imaging of the lower region 22 inside the cylindrical battery by the lower inspection unit 200 are performed at very high speed and can be said to proceed almost 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 these areas can be inspected.

[0077] Although the present invention has been described above with reference to limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and that various modifications and variations can be made by persons with ordinary skill in the art to which the present invention pertains, within the equivalent scope of the technical concept of the present invention and the appended claims.

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

[0079] Although the present invention has been described above with reference to limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and that various modifications and variations can be made by persons with ordinary skill in the art to which the present invention pertains, within the equivalent scope of the technical concept of the present invention and the appended claims. [Explanation of symbols]

[0080] 1 Endoscope lens 20 Cylindrical Battery 20 batteries 21 Upper area 22 Lower area 23 Electrode assembly 25 Positive terminal 26 Negative electrode current collector 27 Positive electrode current collector 100 Upper inspection unit 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 Aperture section 241a Serrated part 242 Motor Bracket 243 Drive motor 243a Shaft 244 Timing belt 300 Optical Path Guide Unit 310 Telescope Tube Section 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 for focusing a first light, and a first camera mounted on the upper side of the first lens module, An inspection unit comprising: a second lens module positioned horizontally apart from the first lens module and for focusing second light; and a second camera mounted above the second lens module; An optical path guide unit is integrally coupled to the first lens module and the second lens module, and is configured to split incident light entering from the object to be inspected into first light and second light, guide the first light to the first lens module, and guide the second light to the second lens module. Battery testing equipment, including...

2. The optical path guide unit is The battery inspection apparatus according to claim 1, comprising: a beam splitter that splits the incident light into a first light and a second light; and a reflector that reflects the first light so that the first light is directed toward the first lens module.

3. The optical path guide unit is A lens barrel section provided in a box shape, having a passage through which the first light and the second light pass, A first lens connection port is located on the upper side of the lens barrel and to which the first lens module is connected, A second lens connection port is located on the upper side of the lens barrel and to which the second lens module is connected, A light inlet / outlet is provided on the lower side of the lens barrel, through which light enters and exits the inside and outside of the lens barrel, The battery inspection apparatus according to claim 2, including the following:

4. Within the passage, the reflector is positioned vertically below the first lens connection port, and the beam splitter is positioned vertically below the second lens connection port. The battery inspection device according to claim 3, wherein the light inlet and outlet are provided at the vertical lower part of the beam splitter.

5. The optical path guide unit is A mirror support that supports and holds the aforementioned reflecting mirror, A splitter support that supports and holds the beam splitter, The mirror support and the splitter support are fitted into a slot that allows them to be inserted into the inside of the lens barrel from the outside, The battery inspection device according to claim 3, comprising:

6. The battery inspection apparatus according to any one of claims 1 to 5, wherein the second lens module includes a telecentric lens.

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

8. The battery inspection apparatus according to claim 7, wherein the first illuminator is a coaxial incident illuminator.

9. The aforementioned lower inspection unit is A battery inspection apparatus according to any one of claims 1 to 5, comprising a second illuminator coupled to the second lens module.

10. The battery inspection apparatus according to claim 9, wherein the second illuminator is a parallel light illuminator.

11. The aforementioned lower inspection unit is The battery inspection apparatus according to claim 9, further comprising an aperture adjuster capable of adjusting the amount of light entering the interior of the second lens module from the second illuminator.

12. The aperture adjuster is, A diaphragm is mounted on a lighting connection port on the second lens module so as to which the second illuminator is connected, and is configured such that when the sawtooth portion on its outer surface rotates clockwise or counterclockwise, its diameter gradually widens or narrows to adjust the amount of light entering the lighting connection port. A motor bracket coupled to the outside of the second lens module, A drive motor fixedly coupled to the motor bracket, The drive motor and the timing belt connected to the sawtooth section, The battery inspection device according to claim 11, including the following:

Images