Battery cell sealed container

Abstract

The present invention provides a battery cell sealed container for preventing corrosion or damage during the process of moving battery cells. The battery cell sealed container according to the present invention includes a first tray having a bottom surface including a plurality of lower end accommodating portions that respectively accommodate the lower ends of a plurality of battery cells and a sidewall extending upward from the bottom surface, and a second tray that seals the first tray and has a top surface including a plurality of upper end accommodating portions that accommodate the upper ends of each battery cell accommodated in the lower end accommodating portions and a sidewall extending downward from the top surface.

Description

[Technical Field]

[0001] The present invention relates to a battery cell enclosure, and more particularly to a battery cell enclosure for preventing corrosion or damage during the process of moving a battery cell.

[0002] This application claims priority based on Korean Patent Application No. 10-2021-0092490 filed on July 14, 2021, and Korean Patent Application No. 10-2022-0067393 filed on June 2, 2022, and the contents disclosed in the specifications and drawings of those applications are incorporated herein in their entirety. [Background technology]

[0003] Typically, secondary batteries used in small electronic products are distributed as individual battery cells packaged together, whereas large-capacity batteries used in hybrid and electric vehicles are packed with multiple battery cells.

[0004] Such battery cells are either manufactured into a battery pack and then delivered to the vehicle manufacturer, or delivered in the form of individual battery cells, which are then manufactured into a battery pack by the vehicle manufacturer or the battery pack manufacturer.

[0005] Because individual battery cells have the problem of short circuit or damage due to contact during transportation, they are delivered in double-layered paper boxes after being loaded onto trays, or in a special packaging case such as the "battery packaging case" disclosed in Patent Document 1.

[0006] However, the existing packaging method has a problem in that it is susceptible to corrosion due to humidity and sea breeze because it does not include a sealing process.

[0007] For example, existing trays can only cover the top and bottom of the loaded battery cells, leaving the sides of the loaded battery cells open, so double paper boxes consisting of an inner box and an outer packaging box must be used to safely protect the loaded battery cells.However, the trays have a non-sealed structure and the packaging in the paper boxes, which are vulnerable to moisture, has the disadvantage of increasing the risk of problems such as corrosion of the outer cases of the battery cells during long-term transportation and storage.

[0008] Therefore, the idea of ​​packaging in special, reusable, airtight packaging cases has been considered, but using expensive special packaging cases is problematic due to the issue of difficulty in collecting them when exporting. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Korean Patent Publication No. 10-2014-0094898 "Battery Packaging Case" Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made in consideration of the above problems, and has as its object to provide a battery cell sealed container that effectively prevents corrosion due to moisture and sea air, and damage due to impact. [Means for solving the problem]

[0011] To achieve the above object, the battery cell sealed container according to the present invention includes a first tray having a bottom surface including a plurality of lower end accommodating portions that respectively accommodate the lower ends of a plurality of battery cells, and side walls extending upward from the bottom surface; and a second tray that seals the first tray and has a top surface including a plurality of upper end accommodating portions that accommodate the upper ends of each battery cell accommodated in the lower end accommodating portions, and side walls extending downward from the top surface.

[0012] The first tray may further include a flange formed outward along an edge of a sidewall of the first tray, and the second tray may further include a mating portion formed downward along an edge of the sidewall of the second tray to cover and fit over the flange. Here, at least one locking piece may be formed on the flange to protrude outward and form an interference fit with an inner surface of the mating portion of the second tray.

[0013] The first tray may further include a fastening portion formed in an upwardly convex shape along an edge of a sidewall of the first tray, the second tray may further include a fastening groove formed in a recessed manner at a lower portion along an edge of the sidewall of the second tray so that the fastening portion of the first tray is sandwiched therein, and the second tray may further include a packing member inserted into the fastening groove of the second tray to seal the gap between the fastening groove and the fastening portion. The fastening groove of the second tray may be a groove having a bottom surface in the second tray including an entrance that opens toward the fastening portion, and an outer surface of the groove may be inclined so that the entrance of the groove is narrower than the bottom surface of the groove, and the packing member inserted into the fastening groove may be fixed to prevent it from coming off.

[0014] The first tray may be an approximately rectangular box shape with an opening at the top, and the bottom surface and side walls of the first tray may be integral with each other, and the second tray may be an approximately rectangular box shape with an opening at the bottom, and the top surface and side walls of the second tray may be integral with each other.

[0015] The first tray and the second tray each have four side walls, and when the second tray is placed over the first tray, the four surfaces of the side walls of the first tray and the second tray come into contact with each other, thereby sealing the inside of the battery cell sealed container.

[0016] The height of the sidewall of the first tray may be greater than the height of the sidewall of the second tray.

[0017] The first tray may further include one or more notch grooves connecting the sidewall of the first tray and the lower receiving portion.

[0018] The notch groove can prevent a gap between the side wall of the first tray and the lower end accommodating portion.

[0019] The battery cell sealed container according to the present invention may further include a desiccant receiving portion on an inner surface of the side wall of the first tray, the desiccant receiving portion providing a space for receiving a desiccant.

[0020] The desiccant accommodating portion may further include at least one protrusion that is included between a sidewall of the first tray and the lower end accommodating portion and that protrudes upward from the inside of the first tray to support one side of the desiccant to prevent the desiccant accommodated in the desiccant accommodating portion from tilting toward the inside of the first tray and coming into contact with the battery cells.

[0021] The battery pack may further include a support arranged along an edge of the lower accommodating portion to support a side surface of the battery cell accommodated in the lower accommodating portion. Here, the desiccant accommodating portion may be disposed between the side wall and the lower accommodating portion and may further include at least one protrusion on an upper portion of the support that protrudes upward from an interior of the first tray to support one side of the desiccant to prevent the desiccant accommodated in the desiccant accommodating portion from tilting toward the interior of the first tray and coming into contact with the battery cell.

[0022] The first tray and the second tray may be made of PP (polypropylene) that does not contain a rust inhibitor.

[0023] The first tray may have a plurality of first tray support edges formed on the inside thereof and may be arranged asymmetrically with respect to the center of the first tray.

[0024] The second tray may have a plurality of second tray support edges formed on the inside thereof and may be arranged asymmetrically with respect to the center of the second tray. [Effects of the Invention]

[0025] The battery cell enclosure according to the present invention has a completely sealed structure and is highly durable so as to ensure the basic safety of the battery cell.

[0026] The battery cell sealed container according to the present invention can replace, for example, the trays and double-layered paper boxes that have been used previously, and also has the effect of reducing packaging material and process losses.

[0027] The battery cell enclosure according to the present invention can provide structural stability by preventing the gap between the side wall of the first tray and the lower accommodating portion due to the notch groove, and also improves the strength of the side wall of the first tray.

[0028] The battery cell container according to the present invention may further include a support member arranged along the edge of the lower receiving portion, thereby increasing the structural rigidity of the first tray, thereby increasing the structural strength of the battery cell container including the first tray.

[0029] According to the battery cell sealed container of the present invention, the first tray containing the battery cells is covered by the second tray in a sealed manner, and a desiccant is contained inside the first tray to effectively prevent corrosion due to moisture and sea breezes, and the upper and lower ends of the battery cells are fixed in a housed state, effectively preventing damage due to impact.

[0030] The battery cell sealed container of the present invention has a structure in which all four sides are sealed to protect not only the top and bottom but also the sides of the loaded battery cells, thereby minimizing performance degradation that may be caused by external factors that may degrade the performance of the loaded battery cells during transport and storage.

[0031] In addition, compared to using a double-layered paper box consisting of an inner box and an outer packaging box, an inner box is not required, and low-cost materials that do not contain rust inhibitors can be used, which has the effect of simplifying the packaging process and contributing to reducing packaging costs.

[0032] The battery cell sealed container of the present invention includes a first tray support end and a second tray support end, which can prevent the trays from getting pinched when the first trays and the second trays are stacked together. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a perspective view showing a battery cell sealed container according to an embodiment of the present invention; [Figure 2] 1 is a diagram illustrating a battery cell sealed container according to an embodiment of the present invention. [Figure 3] 1 is a diagram showing a first tray of a battery cell sealed container according to an embodiment of the present invention. [Figure 4] 10A and 10B are diagrams illustrating an example in which a plurality of first trays of the battery cell sealed container according to one embodiment of the present invention are stacked. [Figure 5] 10A and 10B are diagrams illustrating an example in which a plurality of second trays of the battery cell sealed container according to one embodiment of the present invention are stacked. DETAILED DESCRIPTION OF THE INVENTION

[0034] The structural or functional descriptions specified in the embodiments according to the inventive concepts disclosed herein are provided solely for purposes of illustrating the embodiments according to the inventive concepts, which may be embodied in a variety of forms and are not limited to the embodiments described herein.

[0035] Because embodiments according to the inventive concepts may be variously modified and may have various forms, specific embodiments are shown in the drawings and described in detail herein, but this is not intended to limit the embodiments according to the inventive concepts to the particular forms disclosed, and includes all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] Fig. 1 is a perspective view showing a battery cell sealed container according to an embodiment of the present invention, and Fig. 2 is a view showing a battery cell sealed container according to an embodiment of the present invention. Fig. 2 shows a cross-sectional view corresponding to the A-A' cross section (Y-axis direction) of Fig. 1 and a partially enlarged cross-sectional view.

[0038] As shown in FIGS. 1 and 2, a battery cell sealed container 100 according to an embodiment of the present invention includes a first tray 1 and a second tray 2.

[0039] The first tray 1 includes a plurality of lower accommodating portions 11 that respectively accommodate the lower ends of a plurality of battery cells (not shown, for example, cylindrical battery cells). The second tray 2 seals the first tray 1 and includes a plurality of upper accommodating portions 21 that accommodate the upper ends of each battery cell accommodated in the lower accommodating portions 11. When the battery cells are placed upright (along the Z direction in FIG. 1 ) in the first tray 1 and the lower ends of the battery cells are accommodated in the lower accommodating portions 11, and the second tray 2 is then placed over the battery cells, the upper ends of the battery cells are accommodated in the upper accommodating portions 21. In this way, the lower accommodating portions 11 and the upper accommodating portions 21 form mounting grooves in which the battery cells are individually stacked upright, and the battery cells can be maintained safely accommodated between the lower accommodating portions 11 and the upper accommodating portions 21. In order to accommodate the battery cells in an upright position, when the second tray 2 is placed over the top of the first tray 1, the lower end accommodating portion 11 of the first tray 1 and the upper end accommodating portion 21 of the second tray 2 should be aligned with each other along the Z-axis direction.

[0040] The first tray 1 and the second tray 2 are preferably manufactured by vacuum forming a plastic sheet to reduce manufacturing costs and to provide high structural rigidity relative to their thickness. Such plastic sheets are highly durable to ensure basic safety of the battery cells, and vacuum forming is a molding method suitable for forming the lower end receiving portion 11 and the upper end receiving portion 21 that function as the mounting grooves.

[0041] As shown, the first tray 1 has a roughly rectangular box shape with an opening at the top (in the Z direction in FIG. 1 ), and the bottom surface, which includes the lower-end accommodating section 11, is roughly rectangular with a short side (placed along the Y axis) and a long side (placed along the X axis), and includes side walls extending upward (in the Z direction in FIG. 1 ) from the bottom surface. Of course, the shape of the bottom surface may be square, circular, or any other polygonal shape in addition to a rectangle. However, considering that the battery cell sealed container 100 will be transported in a cardboard box, it is desirable for the battery cell sealed container 100 to also have a rectangular box shape so that it can be efficiently stored in the cardboard box. Therefore, it is desirable for the first tray 1 to also have a rectangular box shape and for its bottom surface to also be rectangular.

[0042] The bottom and sidewalls may be integral. In particular, the first tray 1 preferably has at least one long notch groove 1a formed between the sidewall and the lower receiving portion 11 to prevent the sidewall and the lower receiving portion 11 from separating and provide structural stability. The notch grooves 1a are formed from the sidewalls to the bottom of the first tray 1, and the number of notch grooves 1a can be appropriately adjusted. For example, as shown in the figure, one notch groove 1a can be formed on the short side of the bottom and two on the long side, resulting in a total of six notch grooves. Generally, when a roughly rectangular box-shaped product is formed by vacuum molding and then removed, the sidewalls tend to separate outward. In the present invention, the notch grooves 1a are formed in the first tray 1 to prevent this from occurring, thereby preventing the lower receiving portion 11 of the first tray 1 from separating from the sidewalls. Furthermore, the notch grooves 1a also improve the strength of the sidewalls.

[0043] As shown in the figure, the second tray 2 has a generally rectangular box shape with an opening at the bottom (opposite the Z direction in FIG. 1), and the top surface including the upper storage section 21 is generally rectangular with a short side (placed along the Y axis) and a long side (placed along the X axis), and may include a sidewall extending downward (opposite the Z direction) from the top surface. The top surface and sidewall may be integral. The second tray 2 is formed to follow the shape of the first tray 1 so that it fits as tightly as possible when covering the top of the first tray 1.

[0044] Because the purpose of the battery cell sealed container 100 is to store battery cells, it is desirable for it to have a structure that minimizes the inflow of external moisture and external contaminants. In this embodiment of the present invention, the first tray 1 has four side walls, and the second tray 2 also has four side walls, so that when the first tray 1 is covered from above, the four surfaces of the side walls of the second tray 2 and the first tray 1 come into contact with each other, thereby forming a sealed structure inside the battery cell sealed container 100.

[0045] In addition, in order to remove internal moisture and prepare for even a portion of moisture entering from the outside, the first tray 1 preferably further includes a desiccant receiving portion 13 on the inner surface of the side wall that provides a space for receiving a desiccant 4, thereby preventing corrosion of the battery cells received therein due to moisture. In other words, the desiccant receiving portion 13 may be provided between the side wall of the first tray 1 and the lower receiving portion 11.

[0046] At this time, in order to prevent the desiccant 4 accommodated in the desiccant accommodating portion 13 from tilting inward of the first tray 1 and coming into contact with the battery cells, it is preferable that at least one protrusion 13b protrudes upward from the inside of the first tray 1 to support one side of the desiccant 4. In other words, in order to prevent the desiccant 4 accommodated in the desiccant accommodating portion 13 from tilting inward of the first tray 1 and coming into contact with the battery cells, it is preferable that at least one protrusion 13b protrudes upward from the inside of the first tray 1 to support one side of the desiccant 4.

[0047] Furthermore, in order to maintain the battery cells in an upright position in the first tray 1 after the second tray 2 is removed, it is desirable that the size in the Z-axis direction of the lower end accommodating section 11 of the first tray 1 be larger than the size in the Z-axis direction of the upper end accommodating section 21 of the second tray 2. In order to provide an appropriate and sufficient space for the desiccant accommodating section 13 as described above, it is advantageous to have a higher side wall of the first tray 1, so the height of the side wall of the first tray 1 can be formed higher than the height of the side wall of the second tray 2.

[0048] Conventional trays and battery cases do not include the desiccant storage compartment 13 proposed by the present invention. To prevent battery cell corrosion in conventional trays and battery cases, the trays and battery cases must be made of materials such as expensive PP containing anti-rust agents. By providing a separate desiccant storage compartment 13 and storing the desiccant 4 inside the first tray 1 as in the present invention, expensive PP materials can be eliminated from the first tray 1 and the second tray 2. For example, inexpensive PP materials that do not contain anti-rust agents can be used, resulting in significant savings in packaging costs. Furthermore, by providing a protrusion 13b to support one side of the desiccant 4, even if the desiccant 4 tilts inward, the protrusion 13b prevents it from tilting further and preventing it from coming into contact with the battery cells, ensuring safety during use.

[0049] Because the battery cell sealed container 100 is used to store battery cells, it is desirable for the battery cell sealed container 100 to absorb external shocks to the maximum extent possible. The present invention also proposes a configuration in which the battery cell sealed container 100 can absorb external shocks while still ensuring the structural strength of the battery cell sealed container 100 itself.

[0050] 3 is a diagram showing a first tray of a battery cell sealed container according to one embodiment of the present invention, including a diagram showing the inside of the first tray and a partially enlarged top view.

[0051] As shown in FIG. 2 or 3, it is preferable that the battery pack further includes supports 12 arranged along the edges of the lower accommodating portion 11 to have a predetermined height to support the sides of the battery cells accommodated in the lower accommodating portion 11.

[0052] In particular, the support 12 supports the sides of the battery cells and also functions as a rib that increases the structural rigidity of the first tray 1. This increases the structural strength of the battery cell sealed container 100 including the first tray 1 including the support 12. In this regard, the protrusion 13b that supports one side of the desiccant 4 accommodated in the desiccant-accommodating portion 13 may be formed on the upper part of the support 12.

[0053] In addition, a convex fastening portion 15 may be formed along the edge of the sidewall of the first tray 1, and a recessed fastening groove 23 may be formed along the edge of the sidewall of the second tray 2 so that the fastening portion 15 of the first tray 1 can be fitted into it.

[0054] As shown in the enlarged cross-sectional view of FIG. 2 , the battery cell container according to the present invention may further include a packing member 3 inserted into the fastening groove 23 of the second tray 2, thereby completely sealing the gap between the fastening groove 23 and the fastening portion 15 when the fastening portion 15 is inserted into the fastening groove 23. The packing member 3 is assembled to the outer surface of the second tray 2. When the second tray 2 is placed over the first tray 1, the packing member 3 comes into contact with the sidewall of the first tray 1, enhancing the sealing characteristics. This allows the battery cell container according to the present invention to have a completely sealed structure. This minimizes the intrusion of external moisture and external contaminants. While packing is not typically used in vacuum-formed products, the use of the packing member 3 in the present invention is a distinctive feature of the present invention.

[0055] In this case, the fastening groove 23 of the second tray 2 is a groove having a bottom surface in the second tray 2 so as to include an entrance that opens toward the fastening portion 15 (along the opposite direction of the Z axis), and the outer surface of the groove is formed to be inclined, in particular, the lower end of the outer surface is formed to be inclined inward (i.e., the cross section of the fastening groove 23 along the Y axis direction is formed to become narrower as it progresses in the opposite direction of the Z axis), so that the entrance of the groove is formed narrower than the bottom surface of the groove, and it is desirable that the packing member 3 inserted inside the fastening groove 23 is fixed so as not to come off.

[0056] In addition, in order to increase the sealing force and fastening force between the first tray 1 and the second tray 2, the first tray 1 may have a flange 14 formed outward along the edge of the side wall of the first tray 1, and as shown in detail in the partially enlarged cross-sectional view of Figure 2, a mating portion 22 may be formed downward (in the opposite direction to the Z axis) along the edge of the side wall of the second tray 2, which may be configured to cover and matingly fit over the flange 14.

[0057] Also, referring to FIG. 3, the flange 14 may be formed with at least one or more locking pieces 16 protruding outward, which may be configured to provide a stronger interference fit with the inner surface of the mating portion 22 of the second tray 2.

[0058] The engagement or interference fit between the second tray engagement portion 22 and the flange 14 has the advantage that it is possible to seal the battery cell sealed container 100 and secure the battery cells when the second tray 2 is joined to the first tray 1, but also makes it easy to separate the second tray 2 from the first tray 1, eliminating the need for a separate locking device. When the battery cell sealed container 100 is finally packaged in a cardboard box, a similar effect to locking the second tray 2 and first tray 1 can also be achieved by using the strength of the tape that binds the outside of the cardboard box.

[0059] As described above, the battery cell sealed container of the present invention has a structure in which all four sides are sealed to protect not only the top and bottom but also the sides of the loaded battery cells, thereby minimizing performance degradation due to external factors that may cause performance degradation during transport and storage of the loaded battery cells.

[0060] In addition, compared to using a double-layered paper box consisting of an inner box and an outer packaging box, an inner box is not required, and inexpensive materials that do not contain rust inhibitors can be used, which greatly simplifies the packaging process and contributes to reducing packaging costs.

[0061] FIG. 4 is a diagram illustrating a case where multiple first trays of a battery cell sealed container according to an embodiment of the present invention are stacked along the Z-axis direction, and FIG. 5 is a diagram illustrating a case where multiple second trays of a battery cell sealed container according to an embodiment of the present invention are stacked along the Z-axis direction.

[0062] As shown in FIG. 4 , the first tray 1 may have a plurality of first tray support ends 17 formed on the inner side of the sidewall. These first tray support ends 17 may be arranged asymmetrically with respect to the center of the first tray 1. In the illustrated example, the first tray 1 has four sidewalls, and the first tray support ends 17 are formed on two sidewalls facing each other with respect to the center of the first tray 1, for example, on the short sides of the left and right sidewalls based on the X direction, and may be arranged asymmetrically with respect to the center of the first tray 1. When another first tray 1 is stacked on top of such a first tray 1 in a different direction, the first tray support ends 17 support the lower portion 17a of the other first tray 1, thereby preventing the stacked first tray 1 from being pinched.

[0063] Since multiple first trays 1 can be stacked for storage, storage space can be managed efficiently, and since the first trays 1 do not get pinched together during storage, when one of the first trays 1 is taken out to store battery cells, it can be easily and quickly separated from the other first trays 1, increasing work efficiency.

[0064] 5, a plurality of second tray support edges 27 may be formed on the inside of the second tray 2 and may be arranged asymmetrically with respect to the center of the second tray 2. As shown in the figure, the second tray 2 has four side walls, which may be arranged asymmetrically on two side walls facing the center of the second tray 2, for example, the left and right side walls based on the X direction. When another second tray 2 is stacked on top of such a second tray 2 with the left and right sides facing in different directions, the second tray support edges 27 formed on the other second tray 2 support the top of the second tray 2, thereby preventing the stacked second tray 2 from being pinched.

[0065] Since multiple second trays 2 can be stacked for storage, storage space can be managed efficiently, and since the second trays 2 are not sandwiched between each other during storage, when removing any one of the second trays 2 and covering the top of the first tray 1 containing battery cells with the second tray 2, it can be easily and quickly separated from the other second trays 2, thereby increasing work efficiency.

[0066] While the present invention has been described above with reference to the accompanying drawings, focusing on preferred embodiments, it will be apparent to those skilled in the art that various modifications may be made from such description without departing from the scope of the present invention. Therefore, the scope of the present invention should be construed by the appended claims, which are written to include such various modifications. [Explanation of symbols]

[0067] 1 First Tray 1a Notch groove 2 Second tray 3 Packing material 4. Dehumidifier 11 Lower end housing 12 Support 13 Dehumidifying agent storage section 13b Projection 14 flange 15 Fastening part 16 Locking piece 17 First tray support end 17a lower part 21 Upper end housing section 22 Second tray joint 23 Fastening groove 27 Second tray support end

Claims

1. a first tray including a bottom surface including a plurality of lower end accommodating portions for accommodating lower ends of a plurality of battery cells, and a sidewall extending upward from the bottom surface; a second tray that seals the first tray and has an upper surface including a plurality of upper end accommodating portions for accommodating upper ends of the battery cells accommodated in the lower end accommodating portions, and a sidewall that extends downward from the upper surface; The first tray further includes a fastening portion formed in an upwardly convex shape along an edge of a sidewall of the first tray, the second tray further includes a fastening groove recessed at a lower portion along an edge of a sidewall of the second tray so that the fastening portion of the first tray is sandwiched therein; the second tray further includes a packing member inserted into the fastening groove of the second tray to seal a gap between the fastening groove and the fastening portion, The first tray further includes a desiccant receiving portion on an inner surface of the side wall thereof, the desiccant receiving portion providing a space for receiving a desiccant, the desiccant accommodating portion is disposed between a side wall of the first tray and the lower end accommodating portion, and the desiccant accommodating portion further includes at least one protrusion protruding upward from an interior of the first tray to support one side of the desiccant, in order to prevent the desiccant accommodated in the desiccant accommodating portion from tilting toward the interior of the first tray and coming into contact with the battery cells.

2. the first tray further includes a flange formed outward along an edge of a side wall of the first tray; 2. The sealed container for storing battery cells according to claim 1, wherein the second tray further comprises a fitting portion formed downward along an edge of a side wall of the second tray and adapted to cover and fit over the flange.

3. 3. The sealed container for storing battery cells according to claim 2, wherein the flange has at least one locking piece formed to protrude outward and to fit tightly against the inner surface of the mating portion of the second tray.

4. 2. The sealed container for storing battery cells according to claim 1, wherein the fastening groove of the second tray is a groove having a bottom surface in the second tray including an entrance that opens toward the fastening portion, an outer surface of the groove is formed to be inclined so that the entrance of the groove is narrower than the bottom surface of the groove, and a packing member inserted into the fastening groove is fixed so as not to come off.

5. The first tray has a substantially rectangular box shape with an opening at the top, and the bottom surface and side walls of the first tray are integral with each other, 2. The sealed container for storing battery cells according to claim 1, wherein the second tray is in the shape of a substantially rectangular box having an opening at the bottom, and the top surface and side walls of the second tray are integral with each other.

6. 6. The sealed container for storing battery cells according to claim 5, wherein the first tray and the second tray each have four side walls, and when the second tray is placed over the first tray, the four surfaces of the side walls of the first tray and the second tray come into contact with each other, thereby sealing the inside of the sealed container for storing battery cells.

7. The sealed container for storing battery cells according to claim 6, wherein the height of the side wall of the first tray is greater than the height of the side wall of the second tray.

8. 8. The sealed container for storing battery cells according to claim 1, wherein the first tray further includes one or more notch grooves connecting a side wall of the first tray and the lower end accommodating portion.

9. The sealed container for storing battery cells according to claim 8 , wherein the notch groove prevents a gap between the side wall of the first tray and the lower end housing portion.

10. 2. The sealed container for storing battery cells according to claim 1, further comprising: supports arranged along edges of the lower accommodating portion to support sides of the battery cells accommodated in the lower accommodating portion.

11. 11. The sealed container for storing battery cells according to claim 10, wherein the desiccant accommodating portion is disposed between the side wall and the lower end accommodating portion, and further comprises at least one protrusion on an upper portion of the support body that protrudes upward from an interior of the first tray to support one side of the desiccant, to prevent the desiccant accommodated in the desiccant accommodating portion from tilting toward an interior of the first tray and coming into contact with the battery cells.

12. The sealed container for storing battery cells according to claim 1 , wherein the first tray and the second tray are made of polypropylene that does not contain a rust inhibitor.

13. 2. The sealed container for storing battery cells according to claim 1, further comprising: supports arranged along edges of the lower accommodating portion to support sides of the battery cells accommodated in the lower accommodating portion.

14. The sealed container for storing battery cells according to claim 1 , wherein the first tray has a plurality of first tray support ends formed on the inside thereof, the first tray being asymmetrically disposed with respect to the center of the first tray.

15. The sealed container for storing battery cells according to claim 1 , wherein the second tray has a plurality of second tray support edges formed on the inside thereof, the second tray being asymmetrically disposed with respect to the center of the second tray.

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