Battery cell assembly, battery pack including same, and moving means

Abstract

A battery cell assembly of the present invention comprises: a first cell frame accommodating a plurality of first battery cells; a second cell frame accommodating a plurality of second battery cells and provided to be stacked on one side of the first cell frame; and a screen sheet disposed between the stacked first cell frame and second cell frame. Each of the first cell frame and the second cell frame includes a first coupling portion and a second coupling portion provided to be coupled to each other when stacked, and the screen sheet has an insertion hole into which at least one of the first coupling portion or the second coupling portion is inserted.

Description

Battery cell assembly, battery pack including the same, and means of transportation

[0001] The present invention relates to a battery cell assembly, a battery pack including the same, and a means of transport. More specifically, it relates to a battery cell assembly capable of stably fixing a plurality of battery cells and effectively preventing heat propagation between battery cells, a battery pack including the same, and a means of transport.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0152650 dated October 31, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] With the recent rapid growth of the electric vehicle and energy storage system markets, the demand for high-performance and high-safety batteries is increasing significantly. In line with this trend, the battery industry is focusing on the development of battery modules equipped with multiple battery cells. In particular, optimizing the structure of battery modules to provide high energy density and stability is emerging as a critical challenge.

[0004] One of the methods currently widely used in battery pack manufacturing is the Cell Module Assembly structure. A Cell Module Assembly refers to a form in which multiple battery cells are housed in a cell frame arranged in a specific pattern, with two or more units combined. It offers the advantage of facilitating the design and implementation of battery packs according to required battery capacity or output. In particular, to enhance the efficiency of electrical connections during the manufacturing of Cell Module Assemblies, a method in which the positive terminals are arranged to face each other is frequently used.

[0005] FIG. 1 is a schematic perspective view showing the appearance of a battery cell assembly (30) in which a conventional general upper cell frame (20) and a lower cell frame (10) are combined with each other. FIG. 2 is a schematic cross-sectional view showing a part of the interior of the battery cell assemblies (30) of FIG. 1.

[0006] Referring to FIGS. 1 and 2, the lower cell frame (10) and the upper cell frame (20) can each be arranged to be stacked in the vertical direction. The battery cells (3) housed in the upper cell frame (20) and the lower cell frame (10) are inserted and fixed inside the upper cell frame (2) and the lower cell frame (4). At this time, the battery cells (3) housed in the upper cell frame (20) and the lower cell frame (10) may be arranged such that their respective positive terminals (6) face each other. Additionally, the battery cells (3) and the bus bar (14) can be electrically connected through a wire member (12).

[0007] At this time, the upper cell frame (20) and the lower cell frame (10) are each provided with a first coupling part (9) and a second coupling part (8) for coupling the cell frames (10, 20) to each other. The second coupling part (9) provided at the bottom of the upper cell frame (20) and the first coupling part (8) provided at the top of the lower cell frame (10) can be arranged to be coupled to each other in a male-female manner at corresponding positions. That is, the upper cell frame (20) and the lower cell frame (10) are configured to be coupled to each other by inserting the second coupling part (9) into the internal empty space of the first coupling part (8).

[0008] However, conventional battery cell assemblies have several significant limitations.

[0009] First, there is a safety issue that occurs when a battery cell explodes. Since battery cells tend to explode in the direction where the positive terminal (6) is formed, as shown in FIG. 2, in a structure where the positive terminals (6) face each other, flames and flying debris from the explosion of one battery cell can move to the opposite battery cell (3) and directly cause heat propagation. This can lead to a chain reaction of ignition, which can cause serious safety risks.

[0010] Second, to solve these safety issues, a method of setting a long gap between the upper cell frame (20) and the lower cell frame (10) is used, but this leads to the problem of increasing the size of the entire module. This acts as a major constraint on the miniaturization of the battery module.

[0011] Third, if the first coupling part (8) and the second coupling part (9) provided on the upper cell frame (20) and lower cell frame (10) currently in use have different shapes, it is inevitable to produce two types of separately designed cell frames, which increases the diversity of parts and complicates the assembly process. This can lead to a decrease in production efficiency and an increase in manufacturing costs.

[0012] Fourth, a method of installing a screen sheet is being considered to prevent flame propagation between the upper cell frame and the lower cell frame in the event of battery cell ignition. However, in this case, it is difficult to stably fix the screen sheet after accurately positioning it in the area facing multiple battery cells, and even after fixing it, problems may arise where the screen sheet deviates from its proper position during the manufacturing process or is deformed by external impact, preventing it from fully performing its role as a screen.

[0013] Therefore, a new technology is needed that can optimize module size and manufacturing efficiency while ensuring the safety of the battery cell assembly.

[0014] The present invention aims to solve the problems that occur in conventional battery cell assemblies.

[0015] Specifically, through one embodiment of the present invention, the purpose is to provide a battery cell assembly that can stably fix a plurality of battery cells while effectively preventing heat propagation between battery cells.

[0016] In addition, the present invention aims to provide a battery cell assembly having a structure capable of stably fixing a screen sheet between cell frames through one embodiment of the invention.

[0017] Finally, the present invention aims to provide a battery pack and a means of transport including a battery cell assembly with improved safety and performance through one embodiment of the present invention.

[0018] To achieve the aforementioned objective, according to one embodiment of the present invention, a battery cell assembly is provided comprising: a plurality of first battery cells; a first cell frame accommodating the plurality of first battery cells; a plurality of second battery cells; a second cell frame accommodating the plurality of second battery cells and arranged to be stacked on one side of the first cell frame; and a screen sheet disposed between the stacked first cell frame and the second cell frame; wherein each of the first cell frame and the second cell frame is provided with a first coupling part and a second coupling part arranged to be coupled to each other when stacked, and the screen sheet has an insertion hole formed therein for inserting at least one of the first coupling part and the second coupling part.

[0019] In addition, the first cell frame includes a first coupling portion, and the second cell frame includes a second coupling portion that can be coupled to the first coupling portion when stacked with the first cell frame.

[0020] Additionally, the stacked first cell frame and the second cell frame may have a first surface of the first cell frame and a second surface of the second cell frame facing each other. The first surface of the first cell frame may be provided with a 1-1 coupling part and a 1-2 coupling part, and the second surface of the second cell frame may be provided with a 2-2 coupling part arranged to be coupled with the 1-1 coupling part and a 2-1 coupling part arranged to be coupled with the 1-2 coupling part.

[0021] In addition, the first-1 coupling part and the second-1 coupling part may have the same shape, and the first-2 coupling part and the second-2 coupling part may have the same shape.

[0022] Additionally, the first-2 coupling part and the second-2 coupling part may have a second hole, and the second-1 coupling part and the first-1 coupling part may each be provided to be insertable into the second hole.

[0023] Additionally, the screen sheet may be formed with a plurality of first insertion holes arranged so that at least a portion of the first-1 coupling portion and the second-1 coupling portion is inserted, and a plurality of second insertion holes arranged so that at least a portion of each of the first-2 coupling portion and the second-2 coupling portion is inserted. The first insertion holes and the second insertion holes may have the same diameter.

[0024] In addition, the screen sheet can be fixed in a direction perpendicular to the insertion direction by inserting at least one of the first coupling part and the second coupling part into the insertion hole.

[0025] Additionally, each of the first and second coupling parts may have a column shape protruding from the first and second cell frames, and a first hole and a second hole may be formed extending along the column to the end. The first coupling part of the first cell frame may be inserted into and fixed in the second hole of the second coupling part of the second cell frame, and the first coupling part of the second cell frame may be inserted into and fixed in the second hole of the second coupling part of the first cell frame.

[0026] Additionally, the first cell frame may include a plurality of first support ribs arranged to support one side of the screen sheet, and the second cell frame may include a plurality of second support ribs arranged to support the other side of the screen sheet.

[0027] In addition, the first support rib and the second support rib may be arranged to support both sides (one side and the other side) of the screen sheet at corresponding positions.

[0028] Additionally, the first cell frame may be provided with a plurality of first openings arranged so that the positive terminals and negative terminals of a plurality of first battery cells are exposed to the outside, and the second cell frame may be provided with a plurality of second openings arranged so that the positive terminals and negative terminals of a plurality of second battery cells are exposed to the outside. The first support rib may be located between two adjacent first openings, and the second support rib may be located between two adjacent second openings.

[0029] Additionally, the first support rib may include a first-1 partition section erected in the stacking direction of the first cell frame and the second cell frame, and a first-2 partition section spaced apart from the first-1 partition section by a predetermined distance, and the second support rib may include a second-1 partition section erected in the stacking direction of the first cell frame and the second cell frame, and a second-2 partition section spaced apart from the second-1 partition section by a predetermined distance.

[0030] Additionally, a space open on both sides may be provided between the first bulkhead section and the first bulkhead section, and a space open on both sides may be provided between the second bulkhead section and the second bulkhead section.

[0031] In order to achieve the aforementioned purpose, according to another embodiment of the present invention, a battery pack comprising the battery cell assembly is provided.

[0032] In order to achieve the aforementioned purpose, according to another embodiment of the present invention, a means of transport comprising the battery cell assembly is provided.

[0033] A battery cell assembly according to one embodiment of the present invention can stably fix a screen sheet by utilizing a coupling part provided on each of the first cell frame and the second cell frame and an insertion hole of the screen sheet to improve upon the problems of the prior art. This allows the screen sheet to be fixed in an accurate position without a separate fixing member, thereby simplifying the assembly process and reducing the number of parts, which has the effect of reducing manufacturing costs.

[0034] In addition, the battery cell assembly of the present invention can stably support the screen sheet through support ribs provided in the first and second cell frames and effectively prevent heat propagation between battery cells. This has the effect of significantly improving safety even in the event of abnormal behavior of the battery cells.

[0035] In addition, the battery cell assembly of the present invention is a spaced-apart space between the partitions of the support ribs provided in the first and second cell frames, which can smoothly discharge high-temperature gas emitted during a battery cell explosion. Furthermore, the spaced-apart space serves as a passage for gas discharge, preventing an increase in internal pressure and minimizing secondary damage.

[0036] In addition, the battery cell assembly of the present invention is provided with a first cell frame and a second cell frame having the same structure and material, thereby simplifying the manufacturing process of the battery cell assembly and increasing component compatibility, which can reduce production efficiency and manufacturing costs.

[0037] In addition, the battery pack and the means of transport according to the present invention can provide safer and more efficient performance by including the battery cell assembly.

[0038] FIG. 1 is a schematic perspective view showing the appearance of a conventional general battery cell assembly.

[0039] FIG. 2 is a partial cross-sectional view showing the internal structure of a battery cell assembly of the prior art.

[0040] FIG. 3 is a schematic perspective view showing the appearance of a battery cell assembly according to one embodiment of the present invention.

[0041] FIG. 4 is an exploded perspective view showing the components of a battery cell assembly according to one embodiment of the present invention.

[0042] FIG. 5 is a schematic perspective view showing the appearance of a battery cell included in a battery cell assembly according to one embodiment of the present invention.

[0043] FIG. 6 is a plan view of a first cell frame included in a battery cell assembly according to one embodiment of the present invention.

[0044] FIG. 7 is a bottom view of a second cell frame included in a battery cell assembly according to one embodiment of the present invention.

[0045] FIG. 8 is a partial perspective view showing the appearance of a first cell frame of a battery cell assembly according to one embodiment of the present invention.

[0046] FIG. 9 is a schematic perspective view showing the appearance of a screen sheet mounted on a first cell frame of a battery cell assembly according to one embodiment of the present invention.

[0047] FIG. 10 is a partial cross-sectional view showing the internal appearance of a battery cell assembly according to one embodiment of the present invention.

[0048] FIG. 11 is a side view showing the appearance of a moving means according to one embodiment of the present invention.

[0049] Hereinafter, a battery cell assembly (100) according to one embodiment of the present invention, a battery pack (200) including the same, and a means of transport (300) will be described in detail with reference to the attached drawings.

[0050] Additionally, identical or corresponding components are assigned the same or similar reference numbers regardless of drawing symbols, and redundant descriptions thereof are omitted; furthermore, for the convenience of explanation, the size and shape of each illustrated component may be exaggerated or reduced.

[0051] FIG. 3 is a schematic perspective view showing the appearance of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 4 is an exploded perspective view showing the components of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 5 is a schematic perspective view showing the appearance of a battery cell (110) included in a battery cell assembly (100) according to one embodiment of the present invention.

[0052] Referring to FIGS. 3 to 5, a battery cell assembly (100) according to one embodiment of the present invention includes a plurality of first battery cells (110a), a first cell frame (120), a plurality of second battery cells (110b), a second cell frame (130), and a screen sheet (140).

[0053] As shown in FIGS. 4 and 5, the first battery cell (110a) and the second battery cell (110b) may be cylindrical battery cells (110) of the same structure. For example, the battery cell (110) may be provided with a battery can (116). For example, the battery can (116) may have the shape of a cylindrical can with a closed bottom, and a jelly roll electrode assembly (not shown) is inserted inside it. The battery cell (110) may be provided with a cap plate (115) that is coupled to the top of the battery can (116). The cap plate (115) is provided to seal the open top of the battery can (116). However, the present invention is not necessarily limited to a cylindrical shape for the battery cell case, and a pouch shape, a prismatic shape, a coin shape, etc. may be applied.

[0054] The positive tab (not shown) of the electrode assembly is connected to a positive terminal (111) formed in the center of the cap plate (115), and the negative tab (not shown) is connected to a negative terminal (112) connected to the battery can (116). The negative terminal (112) may be located at the edge of the cap plate (115). Each of the positive terminal (111) and the negative terminal (112) is provided to have a wire member (156) in direct contact. At this time, the wire member (156) may be electrically connected by welding to the positive terminal (111) or the negative terminal (112).

[0055] The electrode terminal portion (113) of each battery cell (110) of the battery cell assembly (100) is provided on a cap plate (115) located on the upper part of the battery cell (110). That is, both the positive terminal (111) and the negative terminal (112) can be located on the upper part of the battery cell (110). Of course, the electrode terminal portion (113) is not necessarily located only on the upper part, and the battery can (116) itself can perform the role of the negative terminal (112).

[0056] Additionally, when each battery cell (110) of the present invention is assembled into a battery cell assembly (100), the positive terminal (111) and the negative terminal (112) can be easily connected to an internal busbar (152) mounted on each of the first and second cell frames (120, 130) via a wire member (156). Also, the internal busbar (152) can be electrically connected to an external busbar (154) as shown in FIG. 3.

[0057] Additionally, the first and second battery cells (110a, 110b) are each provided as cylindrical battery cells. As described above, the first and second battery cells (110a) may each be provided with a positive terminal (111) and a negative terminal (112) at the top. The first and second battery cells (110a, 110b) may be implemented as various types of secondary batteries, such as lithium-ion batteries, for example.

[0058] The battery cell assembly (100) of the present invention includes first and second cell frames (120, 130) to accommodate a plurality of battery cells (110) inside.

[0059] First, the first cell frame (120) accommodates a plurality of first battery cells (110a).

[0060] Additionally, the first cell frame (120) may be provided with a receiving portion (125) consisting of a side wall (125a) and an upper wall (125b), and a cover plate (126) provided to cover the open lower portion of the receiving portion (125). At this time, the receiving portion (125) and the cover plate (126) may be joined by a connecting bolt (128). The first cell frame (120) may be injection molded, for example, from a plastic material, and it is preferable to use a material with excellent fire resistance and electrical insulation properties.

[0061] Additionally, the second cell frame (130) accommodates a plurality of second battery cells (110b) and is arranged to be stacked on one side of the first cell frame (120). The second cell frame (130) may have the same structure and material as the first cell frame (120) overall. This design has the advantage of simplifying the manufacturing process and increasing the compatibility of parts.

[0062] Additionally, the second cell frame (130) may be provided with a receiving portion (135) consisting of a side wall (135a) and a bottom wall (135b), and a cover plate (136) provided to cover the open upper portion of the receiving portion (135). At this time, the receiving portion (135) and the cover plate (136) may be joined by a connecting bolt (138). Furthermore, the second cell frame (130) has the same structure and material as the first cell frame (120), except that it is arranged in an inverted stacking direction.

[0063] FIG. 6 is a plan view of a first cell frame (120) included in a battery cell assembly (100) according to one embodiment of the present invention. FIG. 7 is a bottom view of a second cell frame (130) included in a battery cell assembly (100) according to one embodiment of the present invention.

[0064] The following briefly describes the manufacturing process of the battery cell assembly (100) of the present invention.

[0065] A battery cell assembly (100) associated with one embodiment of the present invention may include a potting resin portion (not shown). Specifically, the potting resin portion fills the space between the battery cells (110: 110a, 110b) within the receiving portions (125, 135) of the first and second cell frames (120, 130), and covers the wire member (156) and the internal busbar (152), thereby preventing damage from external forces and performing electrical insulation. The potting resin portion may be formed from a thermosetting resin, such as, for example, epoxy resin, silicone resin, urethane resin, etc.

[0066] The process of forming the potting resin section is as follows. First, a plurality of battery cells (110) are placed in the receiving sections (125, 135) of the first cell frame (120) and the second cell frame (130), respectively, and then a liquid potting resin is injected. At this time, the potting resin can be filled to completely cover the wire member (156) and the internal bus bar (152) provided on the first surface (120a) and the second surface (130a) of the first cell frame (120) and the second cell frame (130), respectively. After the potting resin is completely filled, the potting resin is cured through heat or ultraviolet rays to form a solid potting resin section. The first surface (120a) and the second surface (130a) represent surfaces that face each other when the first cell frame (120) and the second cell frame (130) are stacked.

[0067] Afterward, a screen sheet (140) is placed on the first surface (120a) of the first cell frame (120), and a second cell frame (130) is stacked thereon. At this time, the first connecting portion (121, 122) of the first cell frame (120) and the second connecting portion (131, 132) of the second cell frame (130) pass through the insertion hole (H) of the screen sheet (140) and are joined to each other in a male-female manner.

[0068] The screen sheet (140) is placed between the stacked first cell frame (120) and the second cell frame (130). The screen sheet (140) may be made of, for example, PC (polycarbonate) material and may have a thickness of about 0.5 mm. This thickness can minimize the overall thickness of the battery cell assembly while providing sufficient insulation and heat blocking effects.

[0069] Each of the first cell frame (120) and the second cell frame (130) is provided with a first connecting part (121, 122) and a second connecting part (131, 132) that are provided to be joined to each other when stacked. The first connecting part (121, 122) is provided as a structure protruding from the first surface (120a) of the first cell frame (120). Additionally, the second connecting part (131, 132) is provided as a structure protruding from the second surface (130a) of the second cell frame (130) facing the first surface (120a) of the first cell frame (120).

[0070] The screen sheet (140) has an insertion hole (H) formed therein so that at least one of the first connecting part (121, 122) and the second connecting part (131, 132) is inserted. The insertion hole (H) may be a circular hole-shaped structure formed in the screen sheet (140). This insertion structure can fix the screen sheet (140) in an accurate position while simultaneously guiding the first connecting part (121, 122) and / or the second connecting part (131, 132) to penetrate the screen sheet (140) and mount the screen sheet (140) in the correct position. Additionally, it enables the screen sheet (140) to be fixed stably. The insertion hole (H) may have a predetermined diameter, and multiple insertion holes (H) may all have the same diameter.

[0071] With this configuration, at least one of the first connecting part (121, 122) and the second connecting part (131, 132) is inserted into the insertion hole (H) of the screen sheet (140), thereby allowing the screen sheet (140) to be stably fixed. Additionally, the screen sheet (140) can be stably fixed without a separate fixing member. This has the effect of simplifying the assembly process and reducing the number of parts, thereby reducing manufacturing costs.

[0072] FIG. 8 is a partial perspective view showing the appearance of a first cell frame (120) of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 9 is a schematic perspective view showing the appearance of a screen sheet (140) mounted on the first cell frame (120) of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 10 is a partial cross-sectional view showing the internal appearance of a battery cell assembly (100) according to one embodiment of the present invention.

[0073] Referring to FIGS. 6 to 10, the first coupling part (121, 122) and the second coupling part (131, 132) are provided so that the first and second cell frames (120, 130) can be coupled at positions facing each other when stacked. To this end, the first surface (120a) of the first cell frame (120) is provided with a first-1 coupling part (121) and a first-2 coupling part (122), and the second surface (130a) of the second cell frame (130) is provided with a second-1 coupling part (131) at a position facing the first-2 coupling part (122), and a second-2 coupling part (132) can be provided at a position facing the first-1 coupling part (121).

[0074] The first-1 coupling part (121) and the first-2 coupling part (122) may have different shapes. Additionally, the second-1 coupling part (131) and the second-2 coupling part (132) may have different shapes. However, the first-1 coupling part (121) may have the same shape as the second-1 coupling part (131). Additionally, the first-2 coupling part (122) and the second-2 coupling part (132) may have the same shape. The first-1 coupling part (121) may be arranged to be male-female coupled with the second-2 coupling part (132), and the second-1 coupling part (131) may be arranged to be male-female coupled with the first-2 coupling part (122).

[0075] As shown in FIG. 4, the screen sheet (140) may be formed with a plurality of first insertion holes (H) arranged so that at least a portion of the first-1 coupling portion and the second-1 coupling portion (131) is inserted, and a plurality of second insertion holes (H) arranged so that at least a portion of each of the first-2 coupling portion and the second-2 coupling portion is inserted. For example, as shown in FIG. 9 and FIG. 10, the first coupling portions (121, 122) or the second coupling portions (131, 132) may be inserted into the plurality of insertion holes (H) of the screen sheet (140) before the first coupling portions (121, 122) and the second coupling portions (131, 132) are coupled to each other.

[0076] Additionally, a plurality of first insertion holes (H) and second insertion holes (H) may be formed in the screen sheet (140). The first and second insertion holes (H) may be formed to be equal to or larger than the first and second coupling parts (121, 122, 131, 132) at a position facing the first and second coupling parts (121, 122, 131, 132) so that the first and second coupling parts (121, 122, 131, 132) can pass through. Furthermore, the plurality of first insertion holes (H) and second insertion holes (H) may have the same shape (e.g., circular) and diameter.

[0077] Accordingly, the present invention allows for the rapid and more stable connection of the first and second cell frames (120, 130) through a plurality of connecting parts (121, 122, 131, 132) by means of this configuration. In addition, the screen sheet (140) can be accurately and easily fixed in place.

[0078] The screen sheet (140) can be fixed in a direction perpendicular to the insertion direction (Z-axis direction) (horizontal direction, X-axis and Y-axis direction) by having the first connecting part (121, 122) and the second connecting part (131, 132) inserted into the insertion hole (H). At this time, the relatively wide two sides of the screen sheet (140) can be arranged to face the first cell frame (120) and the second cell frame (130).

[0079] Accordingly, the present invention can reliably prevent the screen sheet (140) from deviating from its position due to vibration or impact by fixing the screen sheet (140) in a horizontal direction (X-axis and Y-axis direction) through this configuration. In particular, when the battery cell assembly (100) of the present invention is applied to an electric vehicle or other means of transportation, the position of the screen sheet (140) does not change even with vibration and impact occurring during driving, thereby providing safety.

[0080] Referring to FIGS. 6 to 10, the first connecting part (121, 122) and the second connecting part (131, 132) are provided in the form of protruding columns. Each of the first connecting part (121, 122) and the second connecting part (131, 132) may have a first hole (F1) and a second hole (F2) formed in the center of the column, extending from the lower end of the column to the upper end along the direction of protrusion. The first-2 connecting part (122) and the second-2 connecting part (132) may have the second hole (F2), and the first-1 connecting part (121) and the second-1 connecting part (131) may have the first hole (F1). At this time, the second hole (F2) of each of the first-2 coupling part (122) and the second-2 coupling part (132) provides a space into which the second-1 coupling part (131) and the first-1 coupling part (121) of the opposite cell frame can be inserted.

[0081] That is, the first-1 coupling part (121) of the first cell frame (120) can be inserted into and fixed to the second hole (F2) of the second-2 coupling part (132) of the second cell frame (130), and the second-1 coupling part (131) of the second cell frame (130) can be inserted into and fixed to the second hole (F2) of the first-2 coupling part (122) of the first cell frame (120).

[0082] Additionally, the first hole (F1) formed in each of the first-1 coupling part (121) and the second-1 coupling part (131) can provide a clearance space for each of the first-1 coupling part (121) and the second-1 coupling part (131) to deform when each of the first-1 coupling part (121) and the second-1 coupling part (131) is fitted into the second hole (F2) of the second-1 coupling part (131) and the first-2 coupling part (122). The diameter of the first hole (F1) can be formed to be smaller than the diameter of the second hole (F2).

[0083] Accordingly, the present invention enables stable male-female coupling through the first hole (F1) and the second hole (F2) of the first and second coupling parts (121, 122, 131, 132) through this configuration, thereby allowing two cell frames to be stably coupled and providing a structure that is easy to assemble and disassemble.

[0084] The first and second cell frames (120, 130) may be provided with support ribs (123) arranged to support the screen sheet (140). For example, the first cell frame (120) may be provided with a plurality of first support ribs (123), and the second cell frame (130) may be provided with a plurality of second support ribs (133). The first and second support ribs (123, 133) can stably support the screen sheet (140) and maintain a constant gap between the screen sheet (140) and the first and second battery cells (110a, 110b). A plurality of first support ribs (123) may be provided on the first surface (120a) and may protrude toward the second surface (130a). Additionally, a plurality of second support ribs (133) may be provided on the second surface (130a) and may protrude toward the first surface (120a).

[0085] Additionally, the protrusion height of the first support rib (123) and the second support rib (133) may be formed lower than the protrusion height of the first and second connecting parts (121, 122, 131, 132). This structure may allow the insertion of the first and second connecting parts (121, 122, 131, 132) into the insertion hole (H) of the screen sheet (140) while the first support rib (123) and the second support rib (133) support the screen sheet (140) in the stacking direction (Z-axis direction).

[0086] Accordingly, the present invention prevents the screen sheet (140) from moving in the horizontal direction (X-axis and Y-axis direction) by means of the first and second connecting parts (121, 122, 131, 132) by means of such a configuration, and additionally prevents the screen sheet (140) from moving in the stacking direction (Z-axis direction) through the first support rib (123) and the second support rib (133). Accordingly, the present invention enables structural stability to be maintained even during long-term use in means of transport, etc.

[0087] Additionally, as shown in FIG. 10, the first support rib (123) and the second support rib (133) can support one side and the other side of the screen sheet (140) at corresponding positions. That is, the structure may support both sides of the screen sheet (140) by having the first and second support ribs of the two cell frames at corresponding positions. The first and second support ribs of the two cell frames may each be provided at facing positions and may be arranged on a virtual coaxial plane parallel to the stacking direction of the two cell frames.

[0088] Accordingly, the present invention provides a more stable support structure by simultaneously supporting both sides of the screen sheet (140) through this configuration, and can stably fix the position of the screen sheet (140) in the stacking direction.

[0089] Referring to FIGS. 6 to 10, a first cell frame (120) may be provided with a plurality of first openings (124), and a second cell frame (130) may be provided with a plurality of second openings (134). Each of the first and second openings (124, 134) allows the terminal portion (113) of each first and second battery cell (110a, 110b) to be exposed to the outside, thereby facilitating electrical connection between the terminal portion (113) of the first and second battery cells (110a, 110b) and the internal bus bar (152) using a wire member (156).

[0090] Specifically, as shown in FIG. 8, the first support rib (123) may be located between two adjacent first openings (124-1, 124-2). That is, one first opening (124-1) may be located on one side of the first support rib (123), and another first opening (124-2) may be located on the other side.

[0091] Additionally, the second support rib (133) may be located between two adjacent second openings (134-1, 134-2). One second opening (134-1) may be located on one side of the second support rib (133), and another second opening (134-2) may be located on the other side.

[0092] Accordingly, the present invention can prevent heat propagation by blocking the movement of contents and flames scattered through the exposed opening at the top of the battery cell to an adjacent battery cell by the first support rib (123) and the second support rib (133) in the event of an explosion caused by abnormal behavior of the battery cell through this configuration.

[0093] More specifically, the first support rib (123) may include a first-1 partition section (123-1) and a first-2 partition section (123-2). The second support rib (133) may include a second-1 partition section (133-1) and a second-2 partition section (133-2).

[0094] The first-1 partition section (123-1) and the first-2 partition section (123-2) are each erected in the stacking direction of the first cell frame (120) and the second cell frame, and the first-2 partition section (123-2) is spaced apart from the first-1 partition section (123-1) by a predetermined distance. A spaced-away space open on both sides may be provided between the first-1 partition section (123-1) and the first-2 partition section (123-2).

[0095] The 2-1 partition section (133-1) and the 2-2 partition section (133-2) are each erected in the stacking direction of the 1st cell frame (120) and the 2nd cell frame (130), and the 2-2 partition section (133-2) is spaced apart from the 2-1 partition section (133-1) by a predetermined distance. A spaced-away space open on both sides may be provided between the 2-1 partition section (133-1) and the 2-2 partition section (133-2).

[0096] Accordingly, each of the first and second support ribs (123, 133) can prevent high-temperature gas and scattered contents of the battery cell discharged to the first opening (124) or the second opening (134) through the spaced-apart first-1 and first-2 partitions (124-1, 124-2) or second-1 and second-2 partitions (134-1, 134-2) from moving to other battery cells, thereby performing a function to prevent heat propagation between battery cells.

[0097] Furthermore, the gap space open on both sides between the first-1 and first-2 partition sections (124-1, 124-2) or the second-1 and second-2 partition sections (134-1, 134-2) of the present invention can serve as a passage to smoothly discharge high-temperature gas emitted upon the explosion of a battery cell to both sides. This can effectively prevent heat propagation to other battery cells.

[0098] FIG. 11 is a side view showing the appearance of a moving means (300) according to one embodiment of the present invention.

[0099] Referring to FIG. 11, a battery pack (200) according to one embodiment of the present invention includes the battery cell assembly (100) described above. The battery pack (200) can be used in a means of transportation (300) that uses electricity as power, etc. In addition to the battery cell assembly (100), the battery pack (200) may additionally include a battery management system (BMS, not shown), a cooling system, a protection circuit, etc.

[0100] Accordingly, the present invention can provide a safer and more efficient battery pack (200) by including a battery cell assembly (100) with improved safety and performance.

[0101] Referring to FIG. 11, a means of transportation (300) according to one embodiment of the present invention includes a battery pack (200) having at least one of the above-described battery cell assemblies (100). The means of transportation (300) may be, for example, an electric vehicle, an electric scooter, an electric bicycle, or other means of transportation that uses electricity as a power source.

[0102] Accordingly, the present invention can provide a safer and more efficient means of transport (300) by including a battery cell assembly (100) with improved safety and performance.

[0103] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims.

[0104] According to a battery cell assembly according to one embodiment of the present invention, a screen sheet can be stably fixed.

Claims

1. Multiple first battery cells; A first cell frame accommodating the plurality of first battery cells; Multiple second battery cells; A second cell frame configured to accommodate the plurality of second battery cells and to be stacked on one side of the first cell frame; and A screen sheet disposed between the stacked first cell frame and the second cell frame; comprising The first cell frame includes a first coupling portion, and the second cell frame includes a second coupling portion that can be coupled to the first coupling portion when stacked with the first cell frame. A battery cell assembly characterized in that the screen sheet has an insertion hole formed therein so that at least one of the first coupling part and the second coupling part is inserted.

2. In Paragraph 1, The stacked first cell frame and the second cell frame each have a first surface of the first cell frame and a second surface of the second cell frame facing each other, The first surface of the first cell frame is provided with a first-1 coupling part and a first-2 coupling part, and A battery cell assembly having a second-2 coupling part provided to be coupled with the first-1 coupling part and a second-1 coupling part provided to be coupled with the first-2 coupling part on the second surface of the second cell frame.

3. In Paragraph 2, The above-mentioned first-1 connecting part and second-1 connecting part have the same shape, and A battery cell assembly having the same shape as the first-2 joint and the second-2 joint.

4. In Paragraph 2, The above first-2 coupling part and second-2 coupling part may have a second hole, and A battery cell assembly in which a 2-1 coupling part and a 1-1 coupling part can each be inserted into the 2-1 hole.

5. In Paragraph 4, A battery cell assembly in which the 1-1 coupling part and the 2-1 coupling part each have a 1st hole inside.

6. In Paragraph 2, A battery cell assembly characterized in that the screen sheet has a plurality of first insertion holes formed to allow at least a portion of the first-1 coupling portion and the second-2 coupling portion to be inserted, and a plurality of second insertion holes formed to allow at least a portion of each of the first-2 coupling portion and the second-1 coupling portion to be inserted.

7. In Paragraph 6, A battery cell assembly in which the first insertion hole and the second insertion hole have the same diameter.

8. In Paragraph 1, The above screen sheet is, A battery cell assembly characterized by being fixed in a direction perpendicular to the insertion direction, wherein at least one of the first coupling part and the second coupling part is inserted into the insertion hole.

9. In Paragraph 1, The first cell frame includes a plurality of first support ribs arranged to support one side of the screen sheet, and A battery cell assembly characterized in that the second cell frame includes a plurality of second support ribs arranged to support the other side of the screen sheet.

10. In Paragraph 9, A battery cell assembly characterized in that the first support rib and the second support rib are arranged to support both sides of the screen sheet at corresponding positions.

11. In Paragraph 9, The first cell frame is provided with a plurality of first openings arranged so that the positive terminal and negative terminal of the plurality of first battery cells are exposed to the outside, and The second cell frame is provided with a plurality of second openings arranged so that the positive terminal and negative terminal of the plurality of second battery cells are exposed to the outside, and The first support rib is located between two adjacent first openings, and A battery cell assembly characterized in that the second support rib is positioned between two adjacent second openings.

12. In Paragraph 11, The above-mentioned first support rib is, It includes a first-1 partition section erected in the stacking direction of the first cell frame and the second cell frame, and a first-2 partition section spaced apart from the first-1 partition section by a predetermined distance. The above second support rib is, A battery cell assembly characterized by including a 2-1 partition section erected in the stacking direction of the 1st cell frame and the 2nd cell frame, and a 2-2 partition section spaced apart from the 2-1 partition section by a predetermined distance.

13. In Paragraph 12, A spaced-apart space open on both sides is provided between the above-mentioned first-1 partition and the above-mentioned first-2 partition, and A battery cell assembly characterized by having a spaced-apart space open on both sides between the above-mentioned 2-1 partition and the above-mentioned 2-2 partition.

14. A battery pack comprising a battery cell assembly according to any one of claims 1 to 13.

15. A moving means comprising a battery cell assembly according to any one of paragraphs 1 to 13.

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