Interleaving paper and boxes for packaging secondary batteries.

Abstract

The present invention relates to interleaving paper for secondary battery packaging and a secondary battery packaging box, and more specifically, to interleaving paper for secondary battery packaging and a secondary battery packaging box that can prevent damage to the recognition codes of multiple cylindrical battery cells contained within. To achieve the aforementioned objectives, according to one embodiment of the present invention, it is possible to provide a secondary battery packaging intercard and a packaging box including the same, which include partitions that form multiple housing spaces for housing each of a plurality of cylindrical battery cells on which an identification code is printed, and which are provided with contact prevention portions that are arranged to avoid contact with the identification code printed on the outer surface of the housing cylindrical battery cells.

Description

Technical Field

[0001] The present invention relates to an interlayer paper for secondary battery packaging and a box for secondary battery packaging, and more specifically, to an interlayer paper for secondary battery packaging and a box for secondary battery packaging that can prevent damage to the recognition codes of a plurality of housed cylindrical secondary batteries.

Background Art

[0002] A secondary battery is a battery that can be repeatedly used through a discharging process of converting chemical energy into electrical energy and a charging process of converting electrical energy into chemical energy.

[0003] Currently, the types of secondary batteries that are widely used include lithium-ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, etc. The operating voltage of such a unit secondary battery cell, that is, a unit secondary battery, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a plurality of secondary batteries may be connected in series to form a battery pack.

[0004] Also, depending on the charge and discharge capacity required for the battery pack, a plurality of secondary batteries may be connected in parallel to form a battery pack. Therefore, the number of secondary batteries included in the battery pack and the electrical connection form can be variously set according to the required output voltage and / or charge and discharge capacity.

[0005] As types of unit secondary batteries, cylindrical, prismatic, and pouch-type secondary batteries are provided. As shown in FIG. 1, in the case of a cylindrical secondary battery 10, a separator, which is an insulator, is interposed between the positive electrode and the negative electrode and wound to form a jelly roll-shaped electrode assembly (not shown), and this is inserted into a cylindrical battery can 15 to manufacture the cylindrical secondary battery 10.

[0006] An identification code 12 is printed on the outer surface of the cylindrical secondary battery 10. Here, the identification code 12 is used to identify and track the secondary battery during the manufacturing, distribution, use, and recycling processes. Specifically, the identification code 12 is used to display the manufacturing date, manufacturer, model name, serial number, etc., of the secondary battery during the manufacturing process. Using such an identification code 12, a specific secondary battery can be identified and tracked among multiple secondary batteries. Therefore, it is preferable that the identification code 12 is maintained without being erased during the manufacturing, distribution, use, and recycling processes of the secondary battery. The identification code 12 may include a two-dimensional QR code (registered trademark) or barcode, as shown in Figure 1.

[0007] The recognition code 12 can be printed immediately after the manufacturing and inspection of the cylindrical secondary battery 10 is completed.

[0008] Figure 2 is a schematic perspective view showing the contents of a secondary battery packaging box. Figure 3 is a schematic magnified view showing a portion of the cylindrical secondary battery 10.

[0009] The manufactured cylindrical rechargeable batteries can be placed in a packaging box 20. The cylindrical rechargeable batteries can be transferred between the rechargeable battery manufacturing process and the battery pack manufacturing process via the packaging box. The rechargeable battery manufacturing process and the battery pack manufacturing process may be carried out with a time difference between them, and may also be carried out in different spaces. Of course, the main entities of the processes may also be different. Therefore, a packaging box may be used to ensure that the rechargeable batteries are safely housed, stored, or transported.

[0010] As shown in the figure, the packaging box 20 is provided with interleaving paper 25, and individual secondary batteries can be stored separated from each other through the interleaving paper. That is, multiple interleaving papers are provided so as to intersect each other, and secondary batteries can be individually inserted and stored in the storage spaces formed by the interleaving papers.

[0011] During transport, the secondary battery packaging box 20 may be subject to frequent shaking or movement of multiple cylindrical secondary batteries 10 due to external impacts. While the interleaving paper prevents direct contact or collision between the secondary batteries, contact and friction between the interleaving paper and the outer surface of the secondary batteries are inevitable. At this time, the recognition code 12 printed on the outer surface of the cylindrical secondary battery 10 and the secondary battery packaging interleaving paper 25 may come into contact with each other, and such friction may occur frequently.

[0012] Due to this friction, as shown in Figure 3, parts of the recognition code frequently became detached or damaged. In other words, parts of the recognition code were erased, or only traces remained, potentially preventing it from functioning as a normal recognition code. Consequently, there was a problem in that it became difficult to track and manage the secondary battery after the fact.

[0013] For example, Korean Published Patent 2015-0146180 (hereinafter referred to as the "prior patent") discloses a secondary battery cell packaging method and a secondary battery cell package that includes a cell storage step of storing multiple secondary battery cells in storage grooves of a tray.

[0014] Prior patents fail to recognize the problem of damage to the recognition code printed on the outer surface of a secondary battery due to friction that occurs when the recognition code printed on the outer surface of the battery comes into contact with the inner surface of the storage groove in the tray where the cells are housed, and they do not disclose any structure to prevent damage to the recognition code. These prior patents still fail to solve the problem of damage to the printed recognition code of secondary batteries that occurs during delivery.

[0015] Therefore, it is necessary to explore methods that allow cylindrical rechargeable batteries to be conveniently housed and safely transported through packaging boxes, and in particular, that can prevent damage to the battery's recognition code during transport. [Overview of the project] [Problems that the invention aims to solve]

[0016] The present invention aims to solve the problem of damage to the recognition code of cylindrical battery cells stored during conventional shipping.

[0017] Through one embodiment of the present invention, we aim to provide interleaving paper and packaging boxes for secondary batteries that can prevent damage to the recognition codes of multiple cylindrical battery cells contained within, thereby ensuring the safety and reliability of secondary batteries throughout the manufacturing, distribution, use, and recycling processes.

[0018] Through one embodiment of the present invention, we aim to provide interleaving paper and packaging boxes for secondary batteries that can be easily delivered without damage to the recognition code, without having to further apply protective tape to the cylindrical battery cell, as was previously used to prevent damage to the recognition code.

[0019] Through one embodiment of the present invention, we aim to provide a secondary battery packaging intercard and packaging box that can prevent damage to the recognition code while maintaining the storage performance of the cylindrical secondary battery, through only simple modifications to the intercard form or structure. [Means for solving the problem]

[0020] To achieve the aforementioned objectives, according to one embodiment of the present invention, a secondary battery packaging box can be provided, comprising a box body having an external shape that forms an internal space, and a partition wall provided within the box body that divides the internal space into a plurality of housing spaces, each housing a plurality of cylindrical battery cells, wherein the partition wall is provided with a contact prevention portion that is provided to avoid contact with the recognition code printed on the outer surface of the cylindrical battery cells housed in the housing space.

[0021] The position and height of the contact prevention portion can be set to differ depending on the height at which the recognition code is located and the height of the recognition code itself when the cylindrical battery cell is housed in the housing space. The height at which the recognition code is located and the height of the recognition code itself can change in the cylindrical battery cell. Of course, the height of the cylindrical battery cell itself can also change. Therefore, the position and height of the contact prevention portion can be changed flexibly.

[0022] The contact prevention part includes a perforation formed in the partition wall, and the perforation can be formed at a height corresponding to the recognition code. The perforation can be formed in the shape of a through window that penetrates in a square shape.

[0023] The contact prevention part can include a recess formed in the partition wall. The recess can be in a sunken shape with a square shape. By making the thickness of the partition wall in the recess smaller than the thickness of the partition wall in other parts, the recess can be easily formed.

[0024] The partition wall is provided such that the outer surface of the cylindrical battery cell contacts the inner surface of the partition wall, and preferably, the outer surface of the cylindrical battery cell does not contact the inner surface of the partition wall through the contact prevention part. That is, by forming a step in the partition wall, it is preferable to limit contact in a part, that is, contact with the printing surface while allowing contact of the outer surface of the cylindrical battery cell.

[0025] The partition wall can be formed of a paper material. By forming the partition wall in the shape of cardboard, it is possible to ensure unique shock absorption and ease of manufacturing.

[0026] The partition wall can be formed including a plurality of horizontal partition walls and a plurality of vertical partition walls that are cross-coupled with the horizontal partition walls to form the plurality of accommodation spaces in a grid shape. The partition wall may be integrally formed with the box body or may be inserted into the box body in a state separated from the body.

[0027] A plurality of upper grooves are formed in the horizontal partition wall at a predetermined interval, and a plurality of lower grooves are formed in the vertical partition wall at a predetermined interval and are inserted and coupled to each of the plurality of upper grooves.

[0028] The upper groove is formed by being recessed downward from the upper end of the horizontal partition wall, and the lower groove can be formed by being recessed upward from the lower end of the vertical partition wall.

[0029] The length of the lower groove may be even longer than the length of the upper groove.

[0030] The perforated portion of the vertical partition is formed between the upper groove and the adjacent upper groove, and the perforated portion of the vertical partition may be formed between the lower groove and the adjacent lower groove.

[0031] The upper part of the upper groove can have a width wider than the width of the lower part of the upper groove.

[0032] The horizontally partition and the vertically partition cross-coupled to each other may include a flat surface portion forming one surface of the accommodation space of the cylindrical battery cell, and a corner portion formed by the flat surface portion of the horizontally partition and the flat surface portion of the vertically partition.

[0033] The contact prevention portion includes a protective band provided on the partition, and the protective band can be provided so that a surface different from the printing surface on which the recognition code is printed on the outer peripheral surface of the cylindrical battery cell preferentially contacts.

[0034] The protective band can be provided to extend horizontally and long in each of a portion higher and a portion lower than the height corresponding to the recognition code.

[0035] It can further include an outer protective paper that is positioned to closely adhere to the inner surface of the side wall of the box body and includes a plurality of openings positioned at the height corresponding to the recognition code of each of the plurality of accommodated cylindrical battery cells.

[0036] It can further include an outer protective paper on which support bands extending horizontally and long are formed at a portion higher and a portion lower than the height corresponding to the recognition code of each of the plurality of accommodated cylindrical battery cells, and is positioned to closely adhere to the inner surface of the side wall of the box body.

[0037] The outer protective paper can be configured to be overlapped or attached to the inner surface of the main body. The outer protective paper can also be made of cardboard.

[0038] The box body includes a plurality of protective bands provided on its side walls so as not to come into contact with the recognition code printed on the outer surface of the cylindrical battery cell housed in the housing space, and the protective bands may be formed to extend horizontally to portions higher and lower than the height corresponding to the recognition code.

[0039] To achieve the aforementioned objective, according to one embodiment of the present invention, a secondary battery packaging intercard is provided which includes a partition wall that forms a plurality of housing spaces for housing a plurality of cylindrical battery cells each printed with an identification code, and has a contact prevention portion provided to prevent contact with the identification code printed on the outer surface of the housing cylindrical battery cells.

[0040] To achieve the aforementioned objective, according to one embodiment of the present invention, a secondary battery packaging intercard is provided which is inserted into a box body having an external shape that forms an internal space and forms a plurality of storage spaces for each of a plurality of cylindrical battery cells, and which includes a plurality of transverse partitions and a plurality of longitudinal partitions that intersect with the transverse partitions and form a grid shape to form the plurality of storage spaces, wherein contact prevention portions are formed on the transverse partitions and longitudinal partitions so as not to come into contact with the recognition code printed on the outer surface of the cylindrical battery cell when the cylindrical battery cell is housed inside.

[0041] The interleaving paper or partition can be manufactured separately from the main body of the packaging box and inserted into the main body for installation.

[0042] The height of the contact prevention portion can be set to vary depending on the height of the recognition code.

[0043] The contact prevention portion includes a perforation formed in the partition wall, and the perforation may be formed at a height corresponding to the recognition code.

[0044] The partition wall may include a plurality of transverse partition walls and a plurality of longitudinal partition walls that intersect and connect with the plurality of transverse partition walls to form the plurality of accommodation spaces in a grid shape.

[0045] The transverse diaphragm may have a plurality of upper grooves formed at predetermined intervals, and the longitudinal diaphragm may have a plurality of lower grooves formed at predetermined intervals and inserted into and coupled to each of the plurality of upper grooves.

[0046] Interleaving paper for secondary battery packaging, characterized in that the position and height of the contact prevention portion are set to differ from the height at which the recognition code is located and the height of the recognition code when the cylindrical battery cell is housed in the housing space.

[0047] The position of the contact prevention portion is formed to correspond to the position of the recognition code, and it is preferable that the height of the contact prevention portion is greater than the height of the recognition code.

[0048] The contact prevention portion may include perforations formed in the partition wall.

[0049] The contact prevention portion includes a recessed portion formed in the partition wall, and it is preferable that the recessed portion is a portion of the partition wall that is thinner than other portions.

[0050] The height of the contact prevention portion is preferably less than half the overall height of the partition wall. Therefore, the rigidity of the partition wall can be prevented from decreasing due to the contact prevention portion. On the other hand, the width of the contact prevention portion may be greater than half the width of the partition wall in the housing portion that houses one cylindrical battery cell. Even if the entire packaging box tilts to one side and a distortion phenomenon occurs in the partition wall, contact between the recognition code and the partition wall can be effectively prevented. [Effects of the Invention]

[0051] The present invention aims to solve the problem of damage to the recognition code of cylindrical battery cells stored during conventional shipping.

[0052] Through one embodiment of the present invention, it is possible to prevent damage to the recognition codes of multiple cylindrical battery cells contained within, and to provide interleaving paper and packaging boxes for secondary batteries that ensure the safety and reliability of secondary batteries during the manufacturing, distribution, use, and recycling processes of secondary batteries.

[0053] Through one embodiment of the present invention, it is possible to provide interleaving paper and packaging boxes for secondary batteries that can be easily delivered without damage to the recognition code, without having to further apply protective tape to the cylindrical battery cell, which was previously used to prevent damage to the recognition code.

[0054] Through one embodiment of the present invention, it is possible to provide interleaving paper and packaging boxes for secondary batteries that can prevent damage to the recognition code while maintaining the storage performance of cylindrical secondary batteries, simply by making minor modifications to the shape or structure of the interleaving paper.

[0055] Through one embodiment of the present invention, it is possible to provide a secondary battery packaging interpaper and packaging box that can effectively prevent damage to the recognition code by easily forming perforations or recesses in the partitions or interpaper that partition the inside of the packaging box. [Brief explanation of the drawing]

[0056] [Figure 1] This is a perspective view illustrating the general structure of a conventional cylindrical battery cell. [Figure 2] This is a perspective view illustrating the appearance of a conventional secondary battery packaging box. [Figure 3] This is a schematic magnified view showing a portion of a conventional cylindrical battery cell. [Figure 4] This is a schematic perspective view showing the appearance of interleaving paper for secondary battery packaging according to one embodiment of the present invention. [Figure 5] This is a schematic front view showing the lateral partition of a paper insert for secondary battery packaging according to one embodiment of the present invention. [Figure 6]This is a schematic side view showing the longitudinal partition wall of a secondary battery packaging intercard according to one embodiment of the present invention. [Figure 7] This is a schematic perspective view showing a secondary battery packaging box according to one embodiment of the present invention. [Figure 8] This is a schematic partial enlargement view showing an enlarged portion of a secondary battery packaging intercard and a cylindrical battery cell according to one embodiment of the present invention. [Figure 9] This is a schematic front view showing the lateral diaphragm of an interleaving paper for secondary battery packaging according to another embodiment of the present invention. [Figure 10] This is a schematic side view showing the longitudinal partition wall of intercarding paper for secondary battery packaging according to another embodiment of the present invention. [Figure 11] This is a schematic front view showing the outer protective paper of a secondary battery packaging box according to another embodiment of the present invention. [Figure 12] This is a schematic front view showing the outer protective paper of a secondary battery packaging box according to another embodiment of the present invention. [Figure 13] This is a schematic front view showing the inner surface of the side wall of a secondary battery packaging box according to another embodiment of the present invention. [Modes for carrying out the invention]

[0057] A pouch molding apparatus according to one embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0058] Furthermore, regardless of the reference numerals used in the drawings, identical or corresponding components are assigned the same or similar reference numerals, redundant descriptions are omitted, and the size and shape of each component shown may be exaggerated or reduced for the sake of clarity.

[0059] Figure 4 is a schematic perspective view showing the interleaving paper 100 for secondary battery packaging according to one embodiment of the present invention. Figure 5 is a schematic front view showing the transverse partition 111 of the interleaving paper 100 for secondary battery packaging according to one embodiment of the present invention. Figure 6 is a schematic side view showing the longitudinal partition 112 of the interleaving paper 100 for secondary battery packaging according to one embodiment of the present invention. Figure 7 is a schematic perspective view showing the box 1000 for secondary battery packaging according to one embodiment of the present invention. And Figure 8 is a schematic enlarged view showing a magnified portion of the interleaving paper 100 for secondary battery packaging and a cylindrical battery cell 10 according to one embodiment of the present invention.

[0060] First, with reference to Figures 4 to 8, a secondary battery packaging box 1000 including the secondary battery packaging interleaving paper 100 will be described.

[0061] Specifically, the secondary battery packaging box 1000 includes a box body 200. The box body 200 may have an internal space capable of accommodating a plurality of cylindrical battery cells 10. It may have an external shape that forms such an internal space. For example, the secondary battery packaging box 1000 may have a rectangular parallelepiped external shape. For example, the box body 200 may have a front side wall 210, a rear side wall 220, a left side wall 230, a right side wall 240, an upper wall 250, and a lower wall 260. The box body 200 may include, for example, paper material. However, it is not necessarily limited to such materials, and the box body 200 may be formed from an electrically insulating material. For example, the box body 200 may include an electrically insulating plastic material.

[0062] A secondary battery packaging box 1000 according to one embodiment of the present invention may include a partition wall 110. For example, the secondary battery packaging box 1000 of the present invention may include a partition wall 110 in which a plurality of lateral partition walls 111 and a plurality of longitudinal partition walls 112 are connected to each other.

[0063] Specifically, the partition wall 110 may be configured to form multiple housing spaces S, each housing a plurality of cylindrical battery cells 10 on which an identification code 12 is printed. For example, the plurality of housing spaces S may have a grid shape in planar form. That is, one housing space S may be a roughly rectangular parallelepiped space large enough to house one cylindrical battery cell 10.

[0064] Furthermore, the partition wall 110 may be equipped with a contact prevention portion 115. The contact prevention portion 115 may be a portion provided to avoid contact with the recognition code 12 printed on the outer surface of the housed cylindrical battery cell 10. For example, the contact prevention portion 115 may be located on the upper part of the partition wall 110. However, the contact prevention portion 115 is not limited to such positional features and may be set according to the position of the recognition code 12 on the cylindrical battery cell 10.

[0065] Here, the recognition code 12 is used to identify and track the cylindrical battery cell 10 during its manufacturing, distribution, use, and recycling processes. For example, the recognition code 12 may include information such as the manufacturing date, manufacturer, model name, and serial number of the cylindrical battery cell 10 during its manufacturing process. For example, the recognition code 12 may be displayed in 2D marking format, which is a two-dimensional barcode. Here, 2D marking has the advantage of being able to store more data than 1D (one-dimensional) barcodes. Alternatively, the recognition code 12 may be displayed in QR code (registered trademark) format.

[0066] Therefore, the secondary battery packaging box 1000 of the present invention includes a partition wall 110 equipped with a contact prevention portion 115 that is provided to avoid contact with the recognition code 12 printed on the outer surface of the contained cylindrical battery cell 10. As a result, even if the secondary battery packaging box 1000 containing multiple cylindrical battery cells 10 is shaken or moved by external impacts during delivery, the recognition code 12 and the partition wall 110 cannot come into contact, thus effectively preventing damage to the recognition code 12.

[0067] Furthermore, the height of the contact prevention portion 115 can be set to vary depending on the height of the recognition code 12. That is, at a position where the central part of the contact prevention portion 115 faces the central part of the recognition code 12, the height (vertical width) of the contact prevention portion 115 can be set according to the height of the recognition code 12. For example, since the cylindrical battery cell 10 can move up and down due to external impacts during transport within the storage space S, it is desirable that the vertical width of the contact prevention portion 115 be larger than the vertical width of the recognition code 12, taking this into consideration.

[0068] Furthermore, the height of the contact prevention portion 115 can be set according to the height of the recognition code 12 on the outer surface of the cylindrical battery cell 10. That is, the contact prevention portion 115 can be formed at a position corresponding to the recognition code 12 of the cylindrical battery cell 10, or higher or lower than the corresponding position, or at both higher and lower positions. For example, if the recognition code 12 of the cylindrical battery cell 10 is located higher than the vertical midpoint, the contact prevention portion 115 can be formed above the vertical midpoint of the partition wall 110.

[0069] Therefore, the secondary battery packaging box 1000 of the present invention can efficiently prevent damage to the recognition code 12 by setting the height of the contact prevention portion 115 to be different according to the height of the recognition code 12.

[0070] Furthermore, the contact prevention portion 115 may include a perforated portion 115a formed in the partition wall 110. The perforated portion 115a can be formed in a punching process in which a portion of the partition wall 110 is punched. In the punching process, a punch and die can be used to punch a portion of the partition wall 110 to form the perforated portion 115a. In this case, the partition wall 110 may include paper material. However, the material of the partition wall 110 is not necessarily limited to paper, and it may also include an electrically insulating material. For example, the electrically insulating material may be a plastic material. However, it is desirable to manufacture the partition wall and packaging box from corrugated cardboard material, which can reduce manufacturing costs and exhibit shock absorption properties.

[0071] For example, the perforation 115a may be sized to correspond to the recognition code 12 of the cylindrical battery cell 10, or it may be larger than the recognition code 12. The perforation 115a may be formed to a height corresponding to the recognition code 12. For example, the perforation 115a may have shapes such as a circle, square, or triangle. However, the shape of the perforation 115a is not necessarily limited to these shapes, and any shape that can effectively avoid contact with the recognition code 12 is applicable.

[0072] Therefore, the secondary battery packaging box 1000 of the present invention is formed by perforating a portion of the partition wall 110 as a contact prevention portion 115, and includes a perforated portion 115a formed at a height corresponding to the recognition code 12, thereby effectively preventing the recognition code 12 of the cylindrical battery cell 10 and the partition wall 110 from coming into contact with each other.

[0073] For example, the partition wall 110 may include a plurality of lateral partition walls 111 and a plurality of longitudinal partition walls 112. Specifically, the lateral partition walls 111 may be provided to be assembled in a configuration that extends long in the left-right direction (X-axis direction) and stands upright in the up-down direction (Z-axis direction) within the internal space of the box body 200. The longitudinal partition walls 112 may be provided to be assembled in a configuration that extends long in the front-back direction (Y-axis direction) and stands upright in the up-down direction (Z-axis direction) within the internal space of the box body 200. The plurality of longitudinal partition walls 112 may be connected to the plurality of lateral partition walls 111 in a configuration that intersects in the front-back and left-right directions. That is, the plurality of longitudinal partition walls 112 can be assembled with the plurality of lateral partition walls 111 to form a grid-shaped plurality of accommodation spaces S.

[0074] For example, the planar shape of each housing space S is preferably a rectangle, particularly a square. In this case, the planar shape of the cylindrical battery cell 10 is preferably circular. Therefore, due to the structural characteristics of such housing spaces, the cylindrical battery cell 10 can rotate within the housing space. However, due to the square shape of the housing space and the shape of the cylindrical battery cell 10, even if the cylindrical battery cell rotates, the recognition code 12 does not come into contact with the partition wall 110 by the contact prevention part 115.

[0075] Referring to Figures 5 and 6, the transverse septum 111 may be provided with a plurality of upper grooves 113 formed at predetermined intervals. The longitudinal septum 112 may be provided with a plurality of lower grooves 114 formed at predetermined intervals. The plurality of lower grooves 114 can be inserted into each of the plurality of upper grooves 113, thereby connecting the transverse septum 111 and the longitudinal septum 112 to each other.

[0076] Furthermore, the upper groove 113 may be formed by recessing downward from the upper end of the transverse septum 111. The lower groove 114 may be formed by recessing upward from the lower end of the longitudinal septum 112. The vertical length of the lower groove 114 may be even longer than the vertical length of the upper groove 113.

[0077] For example, a perforation 115a in the transverse septum 111 may be formed between one upper groove 113 and a nearby upper groove 113. A perforation 115a in the longitudinal septum 112 may be formed between one lower groove 114 and a nearby lower groove 114.

[0078] Furthermore, the upper part of the upper groove 113 can have a width P that is wider than the width of the lower part of the upper groove 113. That is, by having an upper structure with a width P wider than the width of the lower part of the upper groove 113, the process of inserting the longitudinal partition wall 112 into the upper groove 113 of the transverse partition wall 111 can be made easier. In other words, by making the upper width of the upper groove 113 wider, it is made easier for the lower groove 114 of the longitudinal partition wall 112 to be introduced into the upper part of the upper groove 113. The longitudinal partition wall 112 introduced in this way moves downward along the upper groove 113 of the transverse partition wall 111. As a result, the secondary battery packaging box 1000 of the present invention has the advantage that the transverse partition wall 111 and the longitudinal partition wall 112 can be assembled easily and quickly.

[0079] Furthermore, the transverse slab 111 and longitudinal slab 112, which are intersected and connected to each other, include a flat portion 116. The flat portion 116 may be provided so as to form one surface of the housing space S for the cylindrical battery cell 10. The corner portion 117 may be formed when the flat portion 116 of the transverse slab 111 and the flat portion 116 of the longitudinal slab 112 meet each other.

[0080] Figure 9 is a schematic front view showing the transverse partition 111A of the intercarding paper for secondary battery packaging according to another embodiment of the present invention. And Figure 10 is a schematic side view showing the longitudinal partition 112A of the intercarding paper for secondary battery packaging according to yet another embodiment of the present invention.

[0081] In Figures 9 and 10, along with Figure 1, a secondary battery packaging box according to another embodiment of the present invention differs from the secondary battery packaging box 1000 in Figures 5 and 6 in that it does not have a perforated portion 115a and instead may include a protective band 115b. However, the remaining configuration of the secondary battery packaging box may be similar to or identical to that of the secondary battery packaging box 1000 in Figures 5 and 6.

[0082] For example, the partition wall 110 of the interpaper for secondary battery packaging according to another embodiment of the present invention may include a lateral partition wall 111A and a longitudinal partition wall 112A. For example, the interpaper for secondary battery packaging may be manufactured by joining the lateral partition wall 111A and the longitudinal partition wall 112A together.

[0083] Specifically, the contact prevention section 115 may include a protective band 115b provided on the partition wall 110. For example, as shown in Figures 9 and 10, protective bands 115b may be formed on each of the transverse partition wall 111 and the longitudinal partition wall 112. For example, the protective band 115b may be a long, horizontally extending band along the respective surfaces of the transverse partition wall 111 and the longitudinal partition wall 112. The protective band 115b may have a predetermined thickness in the vertical direction. The horizontal length of the protective band 115b may correspond to or be longer than the horizontal length of the recognition code 12 of the cylindrical battery cell 10.

[0084] Furthermore, the protective band 115b may be provided such that a surface of the cylindrical battery cell 10 other than the printed surface on which the recognition code 12 is printed preferentially makes contact with the protective band 115b. That is, by supporting the outer surface of the cylindrical battery cell 10 that does not have the recognition code 12 printed on it, the protective band 115b can prevent the recognition code 12 from coming into contact with the partition wall 110. In other words, by supporting the outer surface of the cylindrical battery cell 10, the protective band 115b can maintain a distance between the recognition code 12 and the partition wall 110. Therefore, the protective band 115b can maintain a distance between the cylindrical battery cell 10 and the partition wall 110 before the recognition code 12 of the cylindrical battery cell 10 comes into contact with the partition wall 110.

[0085] Furthermore, the protective bands 115b can be formed in portions higher and lower than the height corresponding to the recognition code 12. For example, as shown in Figure 9, 10 protective bands 115b may be formed at a position higher than the height corresponding to the recognition code 12, and the remaining 10 protective bands 115b may be formed at a position lower than the height corresponding to the recognition code 12. That is, the protective bands 115b may be formed at a height that prevents them from contacting the recognition code 12 of the cylindrical battery cell 10 housed in the housing space S. The protective bands 115b may have a form that extends horizontally for a long distance. In this case, the protective bands 115b may have a form that protrudes from the surface of the partition wall 110 toward the cylindrical battery cell 10 with a predetermined thickness.

[0086] Therefore, in the secondary battery packaging box 1000 according to one embodiment of the invention, since the contact prevention portion 115 includes a protective band 115b, an appropriate separation distance can be maintained between the cylindrical battery cell 10 and the partition wall 110, thereby effectively preventing the recognition code 12 of the cylindrical battery cell 10 from coming into contact with the partition wall 110.

[0087] Figure 11 is a schematic front view showing the outer protective paper 300 of a secondary battery packaging box according to another embodiment of the present invention.

[0088] Referring to Figure 11 in conjunction with Figures 7 and 8, a secondary battery packaging box according to another embodiment of the present invention may further include an outer protective paper 300. The outer protective paper 300 can be positioned to be in close contact with the inner surface of the side walls of the box body 200. For example, four outer protective papers 300 may be provided to be in close contact with the inner surfaces of the left side wall 230, the right side wall 240, the front side wall 210, and the rear side wall 220 of the box body 200.

[0089] Furthermore, the outer protective paper 300 may include a plurality of openings 310. The plurality of openings 310 can be positioned at a height corresponding to the respective recognition code 12 of the plurality of cylindrical battery cells 10 housed within. For example, if the recognition code 12 of the plurality of cylindrical battery cells 10 located facing the left wall 230, right wall 240, front wall 210, and rear wall 220 of the box body 200 is formed higher than the vertical midpoint of the cylindrical battery cell 10, the plurality of openings 310 of the outer protective paper 300 may be formed higher than the vertical midpoint of the side walls of the box body 200.

[0090] Therefore, the secondary battery packaging box 1000 of the present invention further includes an outer protective paper 300 having a plurality of openings 310 formed therein, thereby effectively preventing contact between the recognition codes 12 formed on the plurality of cylindrical battery cells 10 and the inner surface of the side wall of the secondary battery packaging box 1000.

[0091] Figure 12 is a schematic front view showing the outer protective paper 300A of a secondary battery packaging box according to another embodiment of the present invention.

[0092] Referring to Figure 12 in conjunction with Figures 7 and 8, another embodiment of the present invention for secondary battery packaging differs from the outer protective paper 300 in Figure 11 in that multiple support bands 320 may be formed on the outer protective paper 300A instead of multiple perforations 115a. Specifically, the outer protective paper 300A can be positioned to be in close contact with the inner surface of the side wall of the box body 200.

[0093] The protective paper 300A may have support bands 320 formed on portions higher and lower than the height corresponding to the respective recognition codes 12 of the multiple cylindrical battery cells 10 housed within it. That is, the support bands 320 may be formed at a height that prevents them from contacting the recognition codes 12 of the cylindrical battery cells 10 housed in the housing space S.

[0094] The support band 320 may have a form that extends horizontally along the outer surface of the outer protective paper 300A. The support band 320 may have a predetermined thickness so that the recognition code 12 of the cylindrical battery cell 10 does not come into contact with the outer surface of the outer protective paper 300A. That is, the support band 320 can prevent the recognition code 12 from coming into contact with the outer surface of the outer protective paper 300A by supporting the outer surface of the cylindrical battery cell 10 where the recognition code 12 is not printed. For example, as shown in Figure 12, two support bands 320 may be formed on the upper part of the outer protective paper 300A facing the cylindrical battery cell 10. Each of the two support bands 320 may be formed higher and lower than the recognition code 12.

[0095] Therefore, the secondary battery packaging box 1000 of the present invention further includes an outer protective paper 300A on which a support band 320 is formed, thereby effectively blocking contact between the recognition code 12 formed on the plurality of cylindrical battery cells 10 and the inner surface of the side wall of the secondary battery packaging box 1000.

[0096] Figure 13 is a schematic front view showing the inner surface of the side wall of a secondary battery packaging box according to another embodiment of the present invention.

[0097] Referring to Figure 13 in conjunction with Figures 7 and 8, another embodiment of the present invention, unlike the secondary battery packaging box 1000 in Figure 7, may have multiple protective bands 250a formed on the inner surface of the side walls. For example, as shown in Figure 13, the multiple protective bands 250a may be formed horizontally aligned on the inner surface of the rear side wall 220. Furthermore, the multiple protective bands 250a may also be formed on the front side wall 210, the left side wall 230, and the right side wall 240 of the box body 200.

[0098] Specifically, the multiple protective bands 250a may be arranged so as not to come into contact with the recognition code 12 printed on the outer surface of the cylindrical battery cell 10 housed in the housing space S. That is, the protective bands 250a support the outer surface of the cylindrical battery cell 10 that does not have the recognition code 12 printed on it, thereby preventing the recognition code 12 from coming into contact with the inner surface of the side wall of the box body 200. For example, protective bands 250a may be formed on the left side wall 230, the right side wall 240, the front side wall 210, and the rear side wall 220 of the box body 200.

[0099] The protective band 250a may be formed to extend horizontally long in portions higher and lower than the height corresponding to the recognition code 12. That is, the protective band 250a may be formed at a height that prevents it from coming into contact with the recognition code 12 of the cylindrical battery cell 10 housed in the housing space S.

[0100] On the other hand, referring again to Figures 4 to 8, the present application can provide an interleaving paper 100 for secondary battery packaging according to one embodiment of the present invention.

[0101] Furthermore, the interleaving paper 100 for secondary battery packaging of the present invention may include a partition wall 110. Here, the partition wall 110 may have a similar or identical configuration to the partition wall 110 described earlier for the secondary battery packaging box 1000. Specifically, the partition wall 110 may be provided so as to be installed in the internal space of the box body 200. When the partition wall 110 is connected to the internal space of the box body 200, it may be provided so as to divide the internal space into a plurality of housing spaces S in which each of the plurality of cylindrical battery cells 10 is housed. For example, the plurality of housing spaces S may have a grid shape in planar form.

[0102] Furthermore, the partition wall 110 may include a contact prevention portion 115. Specifically, the contact prevention portion 115 may be a part of the partition wall 110 that is provided to avoid contact with the recognition code 12 printed on the outer surface of the cylindrical battery cell 10 housed in the housing space S. For example, the contact prevention portion 115 may be located on the upper part of the partition wall 110. However, the contact prevention portion 115 is not limited to such positional features and may be set according to the position of the recognition code 12 on the cylindrical battery cell 10.

[0103] Therefore, the interleaving paper 100 for secondary battery packaging of the present invention includes a partition wall 110 equipped with a contact prevention portion 115 that is provided to avoid contact with the recognition code 12 printed on the outer surface of the contained cylindrical battery cell 10. As a result, even if multiple cylindrical battery cells 10 housed in a secondary battery packaging box 1000 are shaken or moved by external impacts during delivery, the recognition code 12 and the partition wall 110 cannot come into contact, thus effectively preventing damage to the recognition code 12.

[0104] Furthermore, the height of the contact prevention section 115 can be set to vary depending on the height of the recognition code 12. A more detailed explanation of the contact prevention section 115 will be replaced by the explanation given earlier for the secondary battery packaging box 1000.

[0105] Furthermore, the contact prevention portion 115 includes a perforated portion 115a formed in the partition wall 110, and the perforated portion 115a may be formed at a height corresponding to the recognition code 12. A more detailed explanation of the perforated portion 115a will be replaced by the explanation given earlier for the secondary battery packaging box 1000.

[0106] Furthermore, the partition wall 110 may include a plurality of lateral partition walls 111 and a plurality of longitudinal partition walls 112 that intersect and connect with the lateral partition walls 111 to form a grid of multiple containment spaces S.

[0107] Furthermore, multiple upper grooves 113 can be formed in the transverse diaphragm 111 at predetermined intervals.

[0108] Furthermore, the longitudinal septum 112 may have multiple lower grooves 114 formed at predetermined intervals, which are inserted into and connected to each of the multiple upper grooves 113.

[0109] Furthermore, the upper groove 113 may be formed by extending downward and inward from the upper end of the transverse diaphragm 111.

[0110] Furthermore, the lower groove 114 may be formed by extending upward inward from the lower end of the longitudinal septum 112.

[0111] Furthermore, the length of the lower groove 114 may be even longer than the length of the upper groove 113.

[0112] A more detailed explanation of the upper groove 113 and lower groove 114 will be replaced by the explanation given earlier for the secondary battery packaging box 1000.

[0113] Furthermore, the perforation 115a of the transverse diaphragm 111 may be formed between the upper groove 113 and a nearby upper groove 113.

[0114] Furthermore, the perforation 115a of the longitudinal septum 112 may be formed between the lower groove 114 and a nearby lower groove 114. A more detailed explanation of the perforation 115a of the transverse septum 111 or the longitudinal septum 112 will be replaced by the explanation given earlier for the secondary battery packaging box 1000.

[0115] Furthermore, the upper part of the upper groove 113 may have a width P that is wider than the width of the lower part of the upper groove 113. A more detailed explanation of the upper groove 113 will be replaced by the explanation given earlier for the secondary battery packaging box 1000.

[0116] Furthermore, the transverse septum 111 and longitudinal septum 112, which are intersected and connected to each other, include a flat portion 116 that forms one surface of the housing space S for the cylindrical battery cell 10, and a corner portion 117 formed by the flat portion 116 of the transverse septum 111 and the flat portion 116 of the longitudinal septum 112.

[0117] Furthermore, the contact prevention section 115 may include a protective band 115b provided on the partition wall 110. The protective band 115b may be provided such that a surface different from the printed surface on which the recognition code 12 is printed preferentially contacts the outer surface of the cylindrical battery cell 10.

[0118] Furthermore, the protective band 115b may be provided extending horizontally to both the portion higher and the portion lower than the height corresponding to the recognition code 12. A more detailed explanation of the protective band 115b will be replaced by the explanation of the protective band 115b of the secondary battery packaging box 1000 provided earlier.

[0119] The present invention will be described in more detail below using examples to illustrate it concretely, but it is not limited to the examples of the present invention. The examples of the present invention can be modified into a variety of other forms, and the scope of the present invention should not be construed as being limited to the examples described below. The examples of the present invention are provided to give a more complete explanation of the present invention to a person of average skill in the art.

[0120] For example, the aforementioned perforations may be replaced with recesses. The perforations can prevent contact between the recognition code and the partition wall by forming a through-window in a portion of the partition wall. If the partition wall is sufficiently thick, contact between the recognition code and the partition wall can be prevented through the recesses. For example, the thickness of the partition wall in the recesses can be smaller than the thickness of the partition wall in other parts.

[0121] The enclosed cylindrical battery cells may rotate or move up and down. Of course, vertical movement can be severely restricted. Therefore, it is preferable that the height of the perforation or recess is greater than the height of the recognition code. Also, the width of the perforation or recess is formed to be smaller than the width of the partition in a single containment space, preferably more than half the width of the partition. This is because a portion of the partition may become distorted when the entire box is tilted to one side. Even in such a situation, contact between the recognition code and the perforation or recess can be effectively prevented.

[0122] <Examples> The secondary battery packaging box according to an embodiment of the present invention includes the same configuration as the secondary battery packaging box 1000 shown in Figures 4 to 7. In particular, the secondary battery packaging box 1000 of the embodiment includes a box body 200, a transverse partition 111 that divides the internal space of the box body 200 into 100 storage spaces, and a vertical partition 112. At this time, the transverse partition 111 and the vertical partition 112 have perforations 115a formed at a height corresponding to the recognition code 12 of the cylindrical battery cell 10 as contact prevention parts. After storing 100 cylindrical battery cells 10 in the secondary battery packaging box of the embodiment, the box body was sealed. Two secondary battery packaging boxes were prepared in this manner.

[0123] <Comparative Example> The secondary battery packaging box according to the comparative example of the present invention has the same configuration as the secondary battery packaging box of the example, except that perforations are not formed in the transverse and longitudinal diaphragms.

[0124] <Example Test> To investigate the performance of the examples and comparative examples, the damage prevention characteristics of the recognition codes in the secondary battery packaging boxes during flow were evaluated. The test method was carried out according to the vibration test standard corresponding to UN38.3 T3 (vibration test). Specifically, the vibration test conditions were as follows: a 15-minute vibration test was performed using the sine sweep method, and the vibration frequency increased from 7 Hz to 120 Hz for 15 minutes, before decreasing again to 7 Hz. After the test, the presence or absence of damage to the recognition codes of 200 cylindrical battery cells was visually checked, and the number of damaged and undamaged cylindrical battery cells is shown in Table 1 below.

[0125] [Table 1]

[0126] The test results showed that, after the vibration test, the recognition codes of 19 cylindrical battery cells located on the outer casing facing the side wall of the box body were damaged, while none of the remaining cylindrical battery cells located on the inside of the box body had their recognition codes damaged. In other words, the secondary battery packaging box of the embodiment, in which perforations were formed in the transverse and longitudinal diaphragms, prevented contact between the recognition codes of the internally located cylindrical battery cells and the diaphragms, thus preventing damage to the recognition codes. However, it was not possible to prevent contact between the cylindrical battery cells located on the outer casing and the side wall of the box body, resulting in some cylindrical battery cells having damaged recognition codes.

[0127] In the comparative example, as in the example, 18 cylindrical battery cells located in the outer casing had damaged recognition codes. On the other hand, in the comparative example's secondary battery packaging box, no perforations were formed, and it was confirmed that the recognition codes of 8 cylindrical battery cells located on the inside of the box body were damaged.

[0128] Therefore, it can be seen that damage to the recognition code can be prevented very effectively through the partition or interleaving paper in which the contact prevention portion is formed. Furthermore, it can be seen that damage to the recognition code in the cylindrical battery cell housed in the outermost enclosure can also be prevented by using outer protective paper with a contact prevention portion in a similar manner, or by providing a protective band on the inner surface of the box body.

[0129] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and a person skilled in the art with ordinary skill in the invention will know that various modifications, changes, and additions are possible within the spirit and scope of the invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims. [Industrial applicability]

[0130] This is described in detail in the present invention.

Claims

1. A box body having an external shape that forms an internal space, The box body includes a partition wall that divides the internal space into multiple housing spaces, each housing a plurality of cylindrical battery cells, A secondary battery packaging box, wherein the partition wall is provided with a contact prevention portion that prevents contact with the recognition code printed on the outer surface of the cylindrical battery cell housed in the housing space.

2. The secondary battery packaging box according to claim 1, wherein the position and height (vertical width) of the contact prevention portion are set to differ according to the height at which the recognition code is located and the height (vertical width) of the recognition code when the cylindrical battery cell is housed in the housing space.

3. The partition wall is provided such that the outer surface of the cylindrical battery cell is allowed to come into contact with the inner surface of the partition wall, and the outer surface of the cylindrical battery cell does not come into contact with the inner surface of the partition wall via the contact prevention portion, as described in claim 1.

4. The box for packaging a secondary battery according to claim 1, wherein the contact prevention portion includes a perforated portion or recessed portion formed in the partition wall, and the perforated portion or recessed portion is formed to a height corresponding to the recognition code.

5. The box for packaging a secondary battery according to claim 4, wherein the perforated portion includes a through-window from which a portion of the partition wall has been removed, and the recessed portion is formed in which a portion of the partition wall is thinner than the other portion.

6. The partition wall is made of paper material, as described in claim 5, for secondary battery packaging box.

7. The aforementioned partition wall is Multiple transverse diaphragms, The secondary battery packaging box according to claim 4, further comprising a plurality of vertical partitions that intersect and connect with the transverse partition to form the plurality of storage spaces in a grid shape.

8. The transverse diaphragm has a plurality of upper grooves formed at predetermined intervals, The secondary battery packaging box according to claim 7, wherein the longitudinal partition wall has a plurality of lower grooves formed at predetermined intervals and inserted into and coupled to each of the plurality of upper grooves.

9. The secondary battery packaging box according to claim 8, wherein the upper groove is formed by recessing downward from the upper end of the transverse diaphragm, and the lower groove is formed by recessing upward from the lower end of the longitudinal diaphragm.

10. The perforated or recessed portion of the transverse diaphragm is formed between the upper groove and a nearby upper groove. The box for packaging a secondary battery according to claim 9, wherein the perforated or recessed portion of the longitudinal septum is formed between the lower groove and a nearby lower groove.

11. The contact prevention portion includes a protective band provided on the partition wall. The protective band is provided such that a surface of the cylindrical battery cell different from the printed surface on which the recognition code is printed preferentially contacts the protective band, thereby preventing the printed surface on which the recognition code is printed from contacting the partition wall, as described in claim 1.

12. The box for packaging a secondary battery according to claim 11, wherein the protective band is provided extending horizontally to portions higher and lower than the height corresponding to the recognition code.

13. The secondary battery packaging box according to claim 1, further comprising an outer protective paper that is positioned so as to be in close contact with the inner surface of the side wall of the box body and includes a plurality of openings or recesses located at heights corresponding to the recognition codes of each of the plurality of cylindrical battery cells housed within.

14. The secondary battery packaging box according to claim 1, further comprising an outer protective paper positioned so as to be in close contact with the inner surface of the side wall of the box body, with horizontally elongated support bands formed on the portion higher and lower than the height corresponding to the recognition code of each of the plurality of cylindrical battery cells housed therein.

15. The box body is The side wall includes a plurality of protective bands provided so as not to come into contact with the recognition code printed on the outer surface of the cylindrical battery cell housed in the housing space, The aforementioned protective band is The secondary battery packaging box according to claim 1, wherein the box is formed with a horizontal extension extending from both a portion higher than and a portion lower than the height corresponding to the aforementioned recognition code.

16. Interleaving paper for secondary battery packaging, which is inserted into a box body having an external shape that forms an internal space and forms multiple housing spaces for housing multiple cylindrical battery cells, Multiple transverse diaphragms, It includes a plurality of longitudinal partitions that intersect with the transverse partition and form the plurality of accommodation spaces in a grid shape, Interleaving paper for secondary battery packaging, wherein contact prevention portions are formed on the transverse and longitudinal partitions so as not to come into contact with the recognition code printed on the outer surface of the cylindrical battery cell when the cylindrical battery cell is housed within the interleaving paper.

17. The interleaving paper for secondary battery packaging according to claim 16, wherein the position and height (vertical width) of the contact prevention portion are set to differ according to the height at which the recognition code is located and the height (vertical width) of the recognition code when the cylindrical battery cell is housed in the housing space.

18. The intercard for secondary battery packaging according to claim 17, wherein the position of the contact prevention portion is formed to correspond to the position of the recognition code, and the height of the contact prevention portion is greater than the height of the recognition code.

19. The interleaving paper for secondary battery packaging according to claim 16, wherein the contact prevention portion includes a perforated portion formed in the partition wall.

20. The interpaper for secondary battery packaging according to claim 16, wherein the contact prevention portion includes a recessed portion formed in the partition wall, and the recessed portion is a portion of the partition wall that is thinner than other portions.

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