Secondary battery module frame and secondary battery module including the same

Abstract

The present invention relates to a secondary battery module frame, and provides a secondary battery module frame including: a main body having an accommodating space formed therein; and a plurality of exposure holes penetrating one side of the main body to expose the accommodating space, wherein the exposure holes each have a non-light-emitting portion formed along a periphery of an inner surface of the exposure hole to diffusely reflect light incident on the inner surface of the exposure hole.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0092516, filed on July 17, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a secondary battery module frame and a secondary battery module including the same, and more particularly to a secondary battery module frame capable of diffusely reflecting light incident on an inner surface of an exposure hole of the secondary battery module frame and a secondary battery module including the same. [Background technology]

[0003] A rechargeable battery is a battery that can be charged and discharged, unlike primary batteries, which cannot be recharged. Secondary batteries are highly applicable to a variety of products and have electrical characteristics with high energy density. Such secondary batteries are used not only in portable electronic devices but also in electric vehicles or hybrid vehicles powered by electrical sources, power storage devices, and the like. Secondary batteries are attracting attention as a new energy source that not only has the primary advantage of dramatically reducing the use of fossil fuels but also enhances environmental friendliness and energy efficiency because they do not produce any by-products from energy use.

[0004] Medium- to large-sized devices such as electric vehicles require high-output, large-capacity secondary batteries, and therefore a large number of secondary battery modules are used, each consisting of a large number of electrically connected secondary batteries. It is preferable that such secondary battery modules be manufactured to be as small in size and weight as possible, and prismatic, pouch-shaped, and cylindrical secondary batteries, which are light in weight relative to their capacity, are commonly used.

[0005] In addition, the manufacturing process of a secondary battery module is automated, and the manufacturing device for the secondary battery module uses a vision device to obtain a visual image before carrying out the process. In particular, in the manufacturing process of a cylindrical secondary battery module, the wire bonding process for connecting the electrode terminal and the bus bar is performed through a small hole formed in the secondary battery module, which requires precise work. In addition, in the image captured by the vision device, the boundary surface of the hole is obscured due to light reflected from the hole, which can lead to errors in the wire bonding position. Therefore, there is a need to develop a technology to solve these problems. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above-mentioned problems, and provides a secondary battery module frame and a secondary battery module including the same, which diffusely reflect light incident on an inner surface of an exposure hole so as to clearly define an inner area boundary of the exposure hole exposing an accommodating space in an image or video generated by photographing the secondary battery module frame with a photographing device. [Means for solving the problem]

[0007] As a first embodiment of the present invention, there is provided a secondary battery module frame including a main body having an accommodating space formed therein, and a plurality of exposure holes penetrating one side of the main body to expose the accommodating space, wherein the exposure holes each have a non-light-emitting portion formed along a periphery of an inner surface of the exposure hole to diffusely reflect light incident on the inner surface of the exposure hole.

[0008] In addition, the non-light-emitting portion may have a first uneven surface formed in an irregular pattern.

[0009] The first uneven surface may have an average surface roughness of 0.35 μm to 3.00 μm.

[0010] Also, the non-light-emitting portion may have lower luminance than a surface adjacent to the exposure hole.

[0011] In addition, the plurality of exposure holes may form a plurality of exposure hole lines on one surface of the main body, in which the exposure holes are arranged in a row along a first direction, and the plurality of exposure hole lines may be arranged in a second direction perpendicular to the first direction.

[0012] In addition, bus bar grooves recessed to a predetermined depth along the first direction may be formed between the adjacent exposed hole lines.

[0013] In addition, the exposure hole may be injection molded using a mold having a protrusion formed on one surface to form the exposure hole, and the protrusion may have a second uneven surface formed along the periphery of the outer surface.

[0014] The first uneven surface can be formed as a surface corresponding to the second uneven surface.

[0015] The second uneven surface may have an average surface roughness of 0.35 μm to 3.00 μm.

[0016] The second uneven surface can be formed by chemically etching the surface of the protrusion.

[0017] The second uneven surface can be formed by electrically discharging the surface of the protrusion.

[0018] As a second embodiment of the present invention, the present invention provides a secondary battery module including a plurality of secondary batteries, a main body having an internal storage space for accommodating the plurality of secondary batteries, and a plurality of exposure holes penetrating one side of the main body and exposing electrode terminals of the secondary batteries, wherein the exposure holes have non-light-emitting portions formed along the periphery of the inner surfaces of the exposure holes to diffusely reflect light incident on the inner surfaces of the exposure holes.

[0019] The battery may further include a wire having one end connected to an electrode terminal of the secondary battery, the wire being connected inwardly and spaced a predetermined distance from an inner surface of the exposure hole.

[0020] The electronic component may further include a bus bar located on one surface of the body and adjacent to the exposure hole.

[0021] The wire may pass through the exposure hole and have the other end joined to the bus bar. [Effects of the Invention]

[0022] In the secondary battery module frame of the present invention, a light-reflecting area that diffuses light is formed on the inner surface of the exposure hole that exposes the internal storage space, and the boundary of the exposure hole can be clearly defined in an image of the secondary battery module taken by a vision inspection device during the manufacturing process of the secondary battery module, thereby improving image quality, and the accuracy of the joining position of the wire on the electrode terminal can be improved during the process of joining the wire to the electrode terminal of the secondary battery through the exposure hole. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing the outer shape of a secondary battery module frame according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged perspective view showing an "A" area in FIG. 1 according to the first embodiment of the present invention. [Figure 3] 1 is a cross-sectional view schematically showing a first uneven surface formed in a light-absent portion according to a first embodiment of the present invention. [Figure 4] 10 is a cross-sectional view showing a state in which a light-blocking portion is injection-molded using a first mold and a second mold. FIG. [Figure 5] FIG. 10 is a perspective view showing a secondary battery module according to a second embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged perspective view showing a region "B" in FIG. 5 according to a second embodiment of the present invention. [Figure 7] The images were generated by actually photographing an exposure hole using a vision inspection device. (a) is an image showing the unclear boundary of the exposure hole when there is no dark area, and (b) is an image showing the clear boundary of the exposure hole when there is a dark area formed on the inner surface of the exposure hole. DETAILED DESCRIPTION OF THE INVENTION

[0024]

[0030] The present invention will now be described in detail with reference to the accompanying drawings, in which:

[0031] A preferred embodiment of the present invention will be described in detail so that those skilled in the art can easily implement the present invention; however, the present invention may be embodied in various different forms and should not be construed as being limited to the following embodiments.

[0025] In order to clearly explain the present invention, detailed descriptions of parts that are not relevant to the description or related known technologies that may obscure the gist of the present invention are omitted, and when referring to components in each drawing in this specification, the same or similar reference symbols are used throughout the specification to refer to the same or similar components.

[0026] Furthermore, the terms and words used in this specification and claims should not be interpreted in a limited way to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, based on the principle that the inventors can appropriately define the concepts of terms in order to best explain their invention.

[0027] [First embodiment] Referring to FIG. 1, in a first embodiment of the present invention, a secondary battery module frame 10 may include a main body 100 and an exposure hole 200 .

[0028] The main body 100 may form the overall external shape of the secondary battery module frame 10, and may form an accommodating space therein for accommodating the secondary battery 500 therein.

[0029] The housing space of the main body 100 can house a plurality of secondary batteries 500, and the plurality of secondary batteries 500 housed in the housing space can be arranged in a predetermined arrangement manner.

[0030] The main body 100 may be formed of a durable material that will not be damaged by the heat generated by the secondary battery 500, and may include, but is not limited to, one or more polymer materials, such as polypropylene (PP), polycarbonate (PC), ABS resin, polyethylene terephthalate (PET), polyethylene (PE), acrylic resin, and polyvinyl chloride (PVC).

[0031] 2, the exposure hole 200 may be formed to penetrate one surface of the main body 100 to expose the accommodation space of the main body 100 to the outside. The plurality of secondary batteries 500 accommodated in the accommodation space may be exposed through the exposure hole 200. More specifically, the exposure hole 200 is formed to penetrate one surface of the main body 100 opposite the positive electrode terminal of the secondary battery 500 accommodated in the main body 100, and the exposure hole 200 may expose the electrode terminal to the outside when the secondary battery 500 is accommodated in the accommodation space of the main body 100. Therefore, it is possible to determine whether the secondary battery 500 accommodated in the accommodation space is correctly positioned and to determine the positions of the positive and negative electrode terminals through the exposure hole 200 formed in one surface of the main body 100.

[0032] The exposure hole 200 may have any shape that penetrates the main body 100 to expose the receiving space to the outside, and may be, for example, rectangular, circular, elliptical, or semicircular.

[0033] A plurality of exposure holes 200 may be formed on one surface of the body 100 so as to expose the plurality of secondary batteries 500 accommodated in the accommodation space, respectively.

[0034] The plurality of exposure holes 200 may form one or more lines of exposure holes 200 in a row along the first direction a on one surface of the main body 100. The line of exposure holes 200 is arranged in the direction in which the secondary batteries 500 arranged in the accommodating space are arranged in a row, so that the correct arrangement of each of the plurality of secondary batteries 500 can be confirmed through the exposure holes 200, and electrode terminals of the plurality of secondary batteries 500 arranged along the line of exposure holes 200 can be exposed to the outside.

[0035] A plurality of lines of the exposure holes 200 may be formed, and the lines of the exposure holes 200 may be arranged in a second direction b perpendicular to the first direction a.

[0036] 2, the exposure hole 200 may have a non-light-emitting portion 210 formed along the periphery of the inner surface of the exposure hole 200 to diffusely reflect light incident on the inner surface of the exposure hole 200. The inner surface of the exposure hole 200 may form a boundary of the exposure hole 200.

[0037] A busbar groove 300 recessed to a predetermined depth may be formed on one surface of the body 100 adjacent to the exposed hole line so that a busbar can be inserted therein. The busbar groove 300 may be formed between adjacent exposed hole lines. The busbar groove 300 may be formed along the first direction a, like the exposed hole lines.

[0038] The non-light-emitting portion 210 diffuses light incident on the inner surface of the exposure hole 200 in all directions, and therefore may be an area that is darker and less glossy than the area around the exposure hole 200.

[0039] When manufacturing the secondary battery module 11, it is necessary to check whether the secondary batteries 500 are accurately arranged in the accommodation space of the secondary battery module frame 10. This can be done by a worker's direct visual inspection or by using a vision inspection device. The vision inspection device can automatically determine whether the secondary batteries 500 arranged in the accommodation space of the secondary battery module frame 10 are accurately arranged, the positions of the negative and positive electrode terminals of the secondary batteries 500, the boundaries between the negative and positive electrode terminals of the secondary batteries 500, and appropriate positions for joining the wires 700 to the electrode terminals of the secondary batteries 500, through images or videos generated by photographing the secondary battery module 11 during manufacturing. In particular, the vision inspection device can photograph the exposure holes 200 to obtain image data regarding the boundary surfaces of the exposure holes 200 and the appearance of the secondary batteries 500 exposed through the exposure holes 200.

[0040] However, when a vision inspection device photographs an exposure hole 200 that does not have a light-free area 210 on its inner surface, light reflection occurs on the inner surface of the exposure hole 200, and the reflected light flows into the vision inspection device, so the image or video generated by the vision inspection device may show the boundary of the exposure hole 200 unclearly, such as blurred or doubled.

[0041] The non-light portion 210 can solve this problem by scattering the light incident on the non-light portion 210, thereby minimizing the amount of light reflected from the non-light portion 210 that enters the vision inspection device, and the image or video generated by the vision inspection device shows the non-light portion 210 that forms the boundary of the exposure hole 200 dark, thereby making it possible to clearly show the boundary of the exposure hole 200.

[0042] 3, the light-receiving portion 210 may have a first uneven surface 211 having an irregular shape and pattern on its surface so as to diffusely reflect light incident on the light-receiving portion 210. The first uneven surface 211 may have an average surface roughness (Ra) of 0.35 μm to 3.00 μm, which can form a matte surface so that the boundary of the exposure hole 200 appears clearly and reliably in an image or video generated by a vision inspection device.

[0043] The first uneven surface 211 can be formed with a large number of irregular protrusions and irregular grooves in an irregular pattern, and the irregular protrusions and irregular grooves can be sized to satisfy an average surface roughness (Ra) of 0.35 μm to 3.00 μm.

[0044] The non-light area 210 diffuses incident light and is therefore formed with lower brightness than the surface adjacent to the exposure hole 200, thereby solving the problem of the boundary of the exposure hole 200 becoming unclear due to light reflected from the non-light area 210 in an image or video captured by a vision inspection device.

[0045] The body 100 can be manufactured by injecting a molten polymer material between a first mold 400 and a second mold 420, followed by cooling. Here, the exposed groove can be injection molded using a first mold 400 having a protrusion 410 formed on one surface thereof, protruding to a predetermined height, and a second mold 420 having a shape corresponding to the shape of the end of the protrusion 410 so that the protrusion 410 can be inserted.

[0046] The protrusion 410 may form a second uneven surface 411 on the surface along the periphery of the outer surface. The second uneven surface 411 may have an average surface roughness of 0.35 μm to 3.00 μm.

[0047] The second uneven surface 411 can be formed in an irregular pattern, with numerous irregular protrusions and irregular grooves formed in an irregular pattern, and the irregular protrusions and irregular grooves can be formed to a size that satisfies the average surface roughness of 0.35 μm to 3.00 μm.

[0048] 4, the exposure hole 200 may be injection molded using a protrusion 410 formed in a first mold 400 and a second mold 420 having a groove into which an end of the protrusion 410 can be inserted, and the first uneven surface 211 formed on the outer surface of the light-shielding portion 210 may be injection molded using a second uneven surface 411 formed on the outer surface of the protrusion 410. That is, the first uneven surface 211 may be formed as a surface corresponding to the second uneven surface 411.

[0049] The surface roughness of the second uneven surface 411 formed on the surface of the protrusion 410 can be formed by various methods, including, but not limited to, a method of forming the second uneven surface 411 by chemically etching the outer surface of the protrusion 410 to form a number of irregular protrusions and irregular grooves on the surface of the protrusion 410, or a method of forming the surface of the protrusion 410 by electrically discharge machining.

[0050] Second Embodiment Referring to FIG. 5, as a second embodiment of the present invention, a secondary battery module 11 may include a secondary battery 500 , a main body 100 , and an exposure hole 200 .

[0051] Moreover, the secondary battery module 11 may further include a bus bar 600 and a wire 700.

[0052] The secondary battery module 11 may refer to a state in which multiple secondary batteries 500 are housed in a secondary battery module frame 10, and the content relating to the secondary battery module frame 10 may be the same as that described in the first embodiment above.

[0053] The secondary battery 500 may be of various shapes such as a pouch type, a square type, a cylindrical type, etc., and is preferably a cylindrical type secondary battery.

[0054] The cylindrical secondary battery 500 may include a battery can (not shown), a cap assembly (not shown), and an electrode assembly (not shown).

[0055] The cap assembly seals the opening of the battery can and can include the positive electrode terminal and a safety vent.

[0056] The positive electrode terminal may be electrically connected to a positive electrode pin of the electrode assembly (described later) to form a positive electrode. The positive electrode terminal may be located at the center of the cap assembly and may include a shape that protrudes toward the outside of the secondary battery 500.

[0057] The safety vent can burst when high-pressure gas is generated inside the secondary battery due to an abnormal current and the internal pressure rises, thereby releasing the gas to the outside of the secondary battery. The safety vent can be made of a metal material.

[0058] The battery can may be a cylindrical can having an opening on one side and an accommodating space formed therein, in which an electrode assembly and an electrolyte are accommodated, and a cap assembly is attached to the opening to seal the battery can.

[0059] The battery can may be formed from a conductive metallic material such as aluminum, nickel, stainless steel, or alloys thereof.

[0060] The upper end of the battery can may be formed with a beading portion recessed from the outside to the inside of the battery can and a crimping portion for sealing the battery can.

[0061] The electrode assembly may have a structure in which a positive electrode current collector / positive electrode active material layer / separator / negative electrode active material layer / negative electrode current collector are stacked in this order. The positive electrode current collector includes a region coated with a positive electrode active material layer and an uncoated positive electrode uncoated region, and the positive electrode uncoated region may function as a positive electrode tab. The negative electrode current collector includes a region coated with a negative electrode active material layer and an uncoated negative electrode uncoated region, and the negative electrode uncoated region may function as a negative electrode tab. The separator is disposed between the positive electrode current collector and the negative electrode current collector to prevent contact between current collectors of opposite polarities. The electrode assembly may include a jelly roll formed by winding up the stacked structure.

[0062] The electrode assembly formed into a jelly roll may have an upper end of the positive electrode uncoated portion joined to the positive electrode pin to be electrically connected to the cap assembly, and a lower end of the negative electrode uncoated portion joined to the negative electrode pin to be electrically connected to the battery can. The battery can electrically connected to the negative electrode pin may itself serve as a negative electrode terminal.

[0063] That is, the electrode terminals can refer to the positive electrode terminal of the cap assembly and the battery can itself, which is the negative electrode terminal.

[0064] The secondary battery 500 can be accommodated in the accommodation space of the main body so that the positive electrode terminal faces the exposure hole 200 .

[0065] The bus bar 600 may be made of an electrically conductive metal material to electrically connect the plurality of secondary batteries 500 to a circuit board or the like.

[0066] The bus bar 600 may be located on one surface of the main body 100. More specifically, the bus bar 600 may be inserted into a bus bar groove 300 formed to a predetermined depth on one surface of the main body 100. The depth of the bus bar groove 300 may be formed to be the same as or similar to the thickness of the bus bar 600.

[0067] The bus bar 600 may be arranged adjacent to the exposure holes 200 so as to be easily connected to the secondary batteries 500 through the exposure holes 200. More specifically, the bus bar 600 may be arranged between any one line of the exposure holes 200 and the line of the exposure holes 200 closest thereto, and may be arranged along the line of the exposure holes 200 with the first direction a, which is the arrangement direction of the lines of the exposure holes 200, as the longitudinal direction.

[0068] A plurality of bus bars 600 may be provided, and the plurality of bus bars 600 may be arranged between a line of exposure holes 200 and an adjacent line of exposure holes 200 along a second direction b, which is perpendicular to the first direction a.

[0069] The bus bar 600 may be formed in a rectangular shape with a narrower width than its length so as to be arranged along the line of the exposure holes 200 .

[0070] The bus bar 600 may be electrically connected to the electrode terminals of the secondary batteries 500 exposed through the exposure holes 200 via wires 700. The bus bar 600 is formed in a long rectangular shape along the longitudinal direction of the line of the exposure holes 200, and thus may connect a plurality of wires 700 passing through each of the exposure holes 200 forming the line of the exposure holes 200.

[0071] Referring to FIG. 6 , the wire 700 can pass through the exposure hole 200 and connect one end to the electrode terminal of the secondary battery 500 and the other end to the bus bar 600, thereby electrically connecting the bus bar 600 and the electrode terminal of the secondary battery 500.

[0072] The wire 700 may be made of an electrically conductive metal material to electrically connect the bus bar 600 and the secondary battery 500 .

[0073] The wire 700 can be joined to the bus bar 600 and the secondary battery 500 by welding, soldering, or the like.

[0074] The wire 700 connected to the positive electrode terminal of the secondary battery 500 may pass through the exposure hole 200 and be connected to the bus bar 600 located on one side of the exposure hole 200, and the wire 700 connected to the negative electrode terminal of the secondary battery 500 may pass through the exposure hole 200 and be connected to the bus bar 600 located on the other side of the exposure hole 200.

[0075] The wire 700 can be joined by an operator while directly observing the exposure hole 200, or by a wire joining device. One end of the wire 700 can be joined to the inner surface of the exposure hole 200 at a position spaced a predetermined distance inward from the surface extending toward the secondary battery 500.

[0076] 7(a) and 7(b), when the wire bonding device bonds one end of the wire 700 to the electrode terminal of the secondary battery 500, the bonding position can be determined based on an image or video generated by a vision inspection device, and the position where the wire 700 is to be bonded can be determined as a pre-input position within the electrode terminal area of ​​the secondary battery 500 exposed through the exposure hole 200. More specifically, since the wire bonding device inputs the position where the wire 700 is to be bonded as a position spaced a predetermined distance inward from the inner surface of the exposure hole 200, if the boundary of the exposure hole 200 is unclear in the image or video generated by the vision inspection device, the wire bonding device cannot accurately calculate the position where the wire 700 is to be bonded, which can result in an error in the process of bonding the wire 700. In addition, in the cylindrical secondary battery 500, the positive terminal of the cap assembly and the negative electrode terminal of the battery can both face the exposure hole 200, and when the wire 700 is joined to the electrode terminal, if it is not joined accurately to a specific position on the target electrode terminal, a short circuit between the negative and positive electrodes may occur.

[0077] The vision inspection device may be disposed so as to photograph one surface of the secondary battery module 11 from directly above the surface on which the exposure hole 200 is formed in the secondary battery module 11. Because the vision inspection device photographs the exposure hole 200 from above the exposure hole 200, the inner surface of the exposure hole 200 may form the boundary of the exposure hole 200 in the image or video of the exposure hole 200 generated by the vision inspection device. Therefore, a light-free area 210 that diffuses incident light may be formed along the periphery of the inner surface of the exposure hole 200 so that the boundary of the exposure hole 200 is clearly shown in the image or video.

[0078] The non-light-emitting portion 210 diffuses incident light and appears darker than the outer region of the exposure hole 200 in an image or video generated by the vision inspection device, thereby forming a clear boundary of the exposure hole 200. Furthermore, the non-light-emitting portion 210 does not cause interference with light reflected from the electrode terminal region of the secondary battery 500 located inside the exposure hole 200 in the image or video generated by the vision inspection device, thereby enabling the appearance of the electrode terminal of the secondary battery 500 to be clearly shown in the image or video without being distorted. As a result, the wire bonding device can calculate the position where one end of the wire 700 is to be bonded to the electrode terminal of the secondary battery 500 and can bond the wire 700 accurately at that position.

[0079] Third Embodiment As a third embodiment of the present invention, a vision system may include a secondary battery module (a secondary battery module frame 10, a secondary battery module 11) and a vision device (not shown). The details of the secondary battery modules 10 and 11 may be referenced in the first and second embodiments described above.

[0080] The vision device (not shown) can be configured to photograph one surface of the secondary battery module (secondary battery module frame 10, secondary battery module 11) and output a visual image. The image photographed and displayed by the vision device can show multiple exposed holes, the arrangement of the secondary batteries visible through the multiple exposed holes, the electrode lead areas, etc. The wire joining device can recognize the boundary surfaces of the exposed holes, the positive electrode lead area, and the negative electrode area from the image photographed by the vision device, and can join wires to the pre-calculated electrode lead areas from the recognized boundary surfaces of the exposed holes.

[0081] 7(a) shows an actual image of an exposure hole captured by a vision device when the inner surface of the exposure hole is illuminated, and FIG. 7(b) shows an actual image of an exposure hole captured by a vision device when a dark area is formed on the inner surface of the exposure hole. In FIG. 7(a), the boundaries of the exposure holes appear to overlap in the image, making the boundaries unclear. However, in FIG. 7(b), it can be seen that the boundaries of the exposure holes 200 are clearly defined due to diffuse reflection of light by the dark area 210 formed along the periphery of the inner surface of the exposure hole 200.

[0082] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and various implementations are possible within the technical spirit of the present invention and the scope of the claims set forth below by a person having ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0083] 10. Secondary battery module frame 11 Secondary battery module 100 units 200 Exposed Hole 210 No light area 211 First uneven surface 300 Busbar groove 400 First Mold 410 Protrusion 411 2nd uneven surface 420 Second mold 500 secondary battery 600 busbar 700 wire a First direction b Second direction

Claims

1. a main body having an accommodation space formed therein; a plurality of exposure holes formed through one surface of the main body to expose the receiving space; Including, The exposure hole has a non-light-emitting portion formed along a periphery of an inner surface of the exposure hole, the non-light-emitting portion scatteringly reflecting light incident on the inner surface of the exposure hole.

2. The secondary battery module frame of claim 1 , wherein the non-light-emitting portion has a first uneven surface formed in an irregular pattern.

3. The secondary battery module frame according to claim 2 , wherein the first uneven surface has an average surface roughness of 0.35 μm to 3.00 μm.

4. The secondary battery module frame of claim 2 , wherein the non-light-emitting portion has a lower luminance than a surface adjacent to the exposure hole.

5. The plurality of exposure holes form a plurality of exposure hole lines in which the exposure holes are arranged in a line along a first direction on one surface of the body, The secondary battery module frame of claim 1 , wherein the plurality of exposed hole lines are arranged in a second direction perpendicular to the first direction.

6. The secondary battery module frame of claim 5 , wherein a bus bar groove is formed between the adjacent exposed hole lines, the bus bar groove being recessed to a predetermined depth along the first direction.

7. The exposure hole is formed by injection molding using a mold having a protrusion formed on one surface thereof, The secondary battery module frame according to claim 2 , wherein the protrusion has a second uneven surface formed along the periphery of the outer surface.

8. The secondary battery module frame according to claim 7 , wherein the first uneven surface is formed as a surface corresponding to the second uneven surface.

9. The secondary battery module frame according to claim 7 , wherein the second uneven surface has an average surface roughness of 0.35 μm to 3.00 μm.

10. The secondary battery module frame of claim 9 , wherein the second uneven surface is formed by chemically etching the surface of the protrusion.

11. The secondary battery module frame according to claim 9 , wherein the second uneven surface is formed by electrically discharge machining the surface of the protrusion.

12. A plurality of secondary batteries; a main body having an internal storage space in which the plurality of secondary batteries are stored; a plurality of exposure holes penetrating one surface of the body and exposing electrode terminals of the secondary battery; Including, The exposure hole has a non-light-emitting portion formed along a periphery of an inner surface of the exposure hole, the non-light-emitting portion scatteringly reflecting light incident on the inner surface of the exposure hole.

13. The secondary battery further includes a wire having one end connected to an electrode terminal of the secondary battery. The secondary battery module of claim 12 , wherein the wire is bonded to a position spaced a predetermined distance inward from an inner surface of the exposure hole.

14. The secondary battery module of claim 13 , further comprising a bus bar located on one surface of the body and adjacent to the exposure hole.

15. The secondary battery module of claim 14 , wherein the wire passes through the exposure hole and has the other end connected to the bus bar.

16. a secondary battery module; a vision device that captures an image of one surface of the secondary battery module and outputs a visual image; Including, The secondary battery module includes: a main body having an accommodation space formed therein; a plurality of exposure holes formed through one surface of the main body to expose the receiving space; Including, The exposure hole has a non-light portion formed along the periphery of the inner surface of the exposure hole, which diffusely reflects light incident on the inner surface of the exposure hole.

Images