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

Abstract

A battery cell assembly related to one embodiment of the present invention comprises: a plurality of battery cells; a cell frame provided to accommodate the plurality of battery cells therein; a main busbar which is mounted on the cell frame and electrically connected to the plurality of battery cells; a wire member electrically connecting the main busbar and the plurality of battery cells; and a potting part provided to surround some areas of the wire member and the main busbar, wherein the main busbar includes a terminal connection part to which the wire member is coupled, and a raised part extending from the terminal connection part so as to have a height higher than the filled height of the potting part.

Description

Battery cell assembly, battery pack including it, and means of transportation

[0001] The present invention relates to a battery cell assembly, a battery pack, and a means of transport, and more specifically, to a battery cell assembly capable of exhibiting high output by minimizing the length of a wire member while effectively preventing overflow of the potting portion, 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. 10-2024-0136234 filed October 8, 2024 and Korean Patent Application No. 10-2025-0138602 filed September 25, 2025, and all contents disclosed in the documents of said Korean patent applications are incorporated herein as part of this specification.

[0003] With the recent surge in demand for electric-powered mobility devices such as electric vehicles and electric motorcycles, the need for high-performance batteries is also increasing. In particular, the electric motorcycle market is seeing rising demand for battery packs with high-output discharge capabilities, which is emerging as a new challenge for battery technology.

[0004] Currently, wire bonding is widely used inside battery packs to electrically connect each battery cell to a busbar (or metal plate).

[0005] FIG. 1 is a cross-sectional view schematically showing the electrical connection between the main busbar (1) and the battery cell (2) of a general battery cell assembly (10).

[0006] Referring to FIG. 1, a conventional battery cell assembly (10) includes a main busbar (1), a battery cell (2), an electrode terminal (3), a wire (4), a cell frame (5), a protective rib (6), a potting resin (7), etc. Here, the wire (4) is provided to electrically connect the electrode terminal (3) of the battery cell (2) and the main busbar (1).

[0007] Meanwhile, in the manufacturing sector of electric vehicles, there has recently been an increasing demand for higher-output battery packs capable of generating higher torque. However, during high-output discharge of battery packs, wire bonding fuses caused by resistance heat, which can easily lead to wire breakage. Therefore, to meet these demands, it is essential to reduce electrical resistance by optimizing the length, material, and bonding method of the wire bonding.

[0008] Referring to FIG. 1, potting resin (7) can be used to protect the battery cells from external shocks and to provide insulation between the battery cells (2). This potting resin (7) can be filled into the space where the battery cells (2) are housed inside the battery cell assembly (10), and additionally, the connection portion between the wire (4) and the electrode terminal (3) of the battery cell (2) can be immersed on the outside of the cell frame (5).

[0009] Additionally, a prevention rib (6) may be provided on the cell frame (5) to prevent the potting resin (7) from overflowing into an area where the injection of the potting resin (7) is unnecessary during the injection process of injecting the liquid potting resin (7) into the cell frame (5). To this end, the prevention rib (6) may be formed in a shape that is erected higher than the filling height of the potting resin (7).

[0010] However, the wire (4) electrically connecting the main busbar (1) located at the edge of the battery cell assembly (10) and the battery cell (2) must inevitably be located above the prevention rib (6). As shown in FIG. 1, the wire (4) has a structure bent at a certain angle to pass over the prevention rib (6) in order to connect the electrode terminal (3) and the main busbar (1). Thus, the presence of the prevention rib (6) creates a significant limit to reducing the length of the wire (4).

[0011] Furthermore, conventionally, a predetermined gap (P) must be secured between the battery cell (2) and the prevention rib (6) of the cell frame (5). This gap (P) is a separation distance to avoid interference between the wire (4) and the prevention rib (6), but it is a major factor in increasing the length of the wire (4).

[0012] Due to these structural constraints, there have been significant limitations in reducing the length of wire bonding in the past, and consequently, it is very difficult to achieve the goal of minimizing the electrical resistance of wire bonding for high-power discharge in recent times.

[0013] Therefore, there is a need to develop new technology that can minimize the length of wire bonding to enable high-output performance in battery cell assemblies using potting resin.

[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 effectively prevent overflow of the potting portion while minimizing the length of the wire member.

[0016] In addition, the present invention aims to provide a battery cell assembly that can protect the electrical connection of a wire member from external shock and improve electrical insulation through one embodiment of the invention.

[0017] In addition, the present invention aims to provide a battery pack capable of high-output discharge and improved stability, and a means of transportation including the same, through one embodiment of the present invention.

[0018] To achieve the aforementioned purpose, according to one embodiment of the present invention, a battery cell assembly is provided comprising a plurality of battery cells, a cell frame provided to accommodate the plurality of battery cells inside, a main bus bar mounted on the cell frame and electrically connected to the plurality of battery cells, a wire member electrically connecting the main bus bar and the plurality of battery cells, and a potting portion provided to surround a portion of the wire member and the main bus bar.

[0019] Additionally, the main busbar includes a terminal connection portion to which the wire member is connected, and a ridge extending from the terminal connection portion such that it has a height greater than the filled height of the potting portion.

[0020] The terminal connection portion may be mounted on the cell frame and arranged to be immersed into the potting portion. Additionally, the terminal connection portion may be disposed on one surface of the cell frame and extend along the surface of said surface. The terminal connection portion may have a flat plate shape.

[0021] In addition, the main busbar may further include a BMS connection portion that extends from the raised portion and is configured to connect to a battery management system.

[0022] The above-mentioned protrusion may be bent upward from the above-mentioned terminal connection portion, and the above-mentioned BMS connection portion may be bent downward from the above-mentioned protrusion.

[0023] The above-mentioned BMS connection part is provided with a connection port into which a connection bolt is inserted, and the connection bolt may be provided to combine the BMS connection part with a BMS connection busbar. The BMS connection busbar may be electrically connected to a battery management system. For example, the BMS connection part and the BMS connection busbar may come into contact by tightening the connection bolt.

[0024] The cell frame may include a first prevention rib having an upright shape and provided at the lower part of the raised portion.

[0025] The upper end of the first prevention rib may be arranged to contact the lower surface of the raised portion of the main busbar.

[0026] The cell frame may include a second prevention rib and a third prevention rib having a height greater than the filled height of the potting portion to cover the sides of the ridge portion, respectively. The second prevention rib and the third prevention rib may be arranged to cover both sides of the ridge portion, respectively. The second prevention rib and the third prevention rib may be spaced apart at a predetermined interval, and the second prevention rib and the third prevention rib may be arranged approximately parallel to each other.

[0027] Each of the second and third prevention ribs may extend along the upward direction (or extension direction) of the ridge.

[0028] The above wire member can be arranged so that the entire area is immersed by the potting part.

[0029] The battery cell assembly may additionally include a sub-busbar configured to connect the plurality of battery cells in series or in parallel.

[0030] Additionally, the main busbar may be positioned at the edge of the upper side wall of the cell frame, and the sub-busbar may be positioned inside the upper side wall of the cell frame.

[0031] The above wire member may include a first wire member arranged to be coupled with the main busbar, and a second wire member arranged to be coupled with the sub-busbar.

[0032] The above main busbar may have only a partial area covered by the potting part, and the above sub busbar may have its entire area covered by the potting part.

[0033] The cell frame may be provided with a barrier wall formed at the edge of the upper wall that is higher than the filling height of the potting section. In this case, the main busbar may be positioned at the edge of the upper wall of the cell frame with a portion of its area in contact with the barrier wall. For example, the barrier wall may be provided continuously along the edge of the upper wall along the perimeter of the upper wall. The main busbar may be positioned within the space enclosed by the barrier wall.

[0034] The potting portion can be filled inside the cell frame in which the plurality of battery cells are accommodated.

[0035] To achieve the aforementioned purpose, according to another embodiment of the present invention, a battery pack comprising the battery cell assembly and a battery management system is provided.

[0036] In order to achieve the aforementioned purpose, according to another embodiment of the present invention, a means of transportation including the battery pack is provided.

[0037] A battery cell assembly, battery pack, and means of transport related to one embodiment of the present invention have the following effects.

[0038] In a battery cell assembly according to one embodiment of the present invention, the raised portion of the main busbar is formed higher than the filled height of the potting portion, thereby effectively preventing overflow of the potting portion. This allows the prevention rib that existed between the main busbar and the wire member in the prior art to be omitted, thereby eliminating the constraint on minimizing the length of the wire member. As a result, a battery cell assembly capable of high-output discharge can be realized.

[0039] In addition, the battery cell assembly of the present invention can more effectively prevent overflow of the potting portion by providing first, second, and third prevention ribs on the cell frame. In particular, the first prevention rib provided at the lower part of the raised portion, and the second prevention rib and the third prevention rib connected to each of the two sides of the first prevention rib to form an overall H shape, can more completely prevent overflow of the potting portion.

[0040] In addition, the battery cell assembly of the present invention is configured such that the wire member is immersed by the potting portion, thereby protecting the electrical connection portion of the wire member from external shock and improving electrical insulation. This allows for increased durability and safety of the battery cell assembly.

[0041] The battery pack of the present invention, by including a battery cell assembly as described above, can provide a battery pack capable of high-output discharge and with improved stability.

[0042] In addition, the means of transportation of the present invention can provide a means of transportation with high performance and stability by including such a battery pack.

[0043] Figure 1 is a cross-sectional view schematically showing the electrical connection between the main busbar and the battery cell of a typical battery cell assembly.

[0044] FIG. 2 is a schematic perspective view showing the appearance of a battery cell assembly according to one embodiment of the present invention.

[0045] FIG. 3 is an exploded perspective view schematically showing the appearance of some components of a battery cell assembly according to one embodiment of the present invention.

[0046] FIG. 4 is a schematic plan view showing the appearance of a battery cell assembly according to one embodiment of the present invention with the potting portion excluded.

[0047] FIG. 5 is a schematic plan view showing the appearance of a cell frame of a battery cell assembly according to one embodiment of the present invention.

[0048] FIG. 6 is a block diagram conceptually illustrating the configurations of a battery cell assembly according to one embodiment of the present invention.

[0049] FIG. 7 is a perspective view schematically showing the appearance of a battery cell of a battery cell assembly according to one embodiment of the present invention.

[0050] FIG. 8 is a schematic diagram showing the electrical connection of the components of a battery cell assembly according to one embodiment of the present invention.

[0051] FIG. 9 is a perspective view schematically showing the appearance of a main busbar according to one embodiment of the present invention.

[0052] FIG. 10 is a partial perspective view showing a part of a battery cell assembly according to one embodiment of the present invention.

[0053] FIG. 11 is a partial plan view showing the main busbar and prevention ribs of a battery cell assembly according to one embodiment of the present invention.

[0054] FIG. 12 is a vertical cross-sectional view showing a part of a battery cell assembly according to one embodiment of the present invention.

[0055] FIG. 13 is a side view showing the appearance of a moving means according to one embodiment of the present invention.

[0056] 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.

[0057] 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.

[0058] FIG. 2 is a schematic perspective view showing the appearance of a battery cell assembly (100) according to one embodiment of the present invention, and FIG. 3 is an exploded perspective view showing the appearance of some components of a battery cell assembly (100) according to one embodiment of the present invention.

[0059] Referring to FIGS. 2 and 3, a battery cell assembly (100) according to one embodiment of the present invention includes a plurality of battery cells (110), a cell frame (130), a main bus bar (120), a wire member (140), and a potting section (150). Additionally, a battery cell assembly (100) according to one embodiment of the present invention may include a plurality of battery cells (110), a cell frame (130), a main bus bar (120), a sub bus bar (125), a wire member (140), and a potting section (150).

[0060] FIG. 4 is a schematic plan view showing the appearance of a battery cell assembly (100) according to one embodiment of the present invention with the potting portion excluded. FIG. 5 is a schematic plan view showing the appearance of a cell frame (130) of a battery cell assembly (100) according to one embodiment of the present invention. In addition, FIG. 6 is a block diagram conceptually showing the configurations of a battery cell assembly (100) according to one embodiment of the present invention.

[0061] In addition, FIG. 7 is a perspective view schematically showing the appearance of a battery cell of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 8 is a configuration diagram schematically showing the electrical connection of the components of a battery cell assembly (100) according to one embodiment of the present invention.

[0062] Referring to FIGS. 4 through 8, the electrical connection structure of the battery cell assembly (100) is as follows. For example, a plurality of battery cells (110) may be connected in series or in parallel by a plurality of sub-busbars (125). The plurality of battery cells (110) connected in series or in parallel are electrically connected to a positive main busbar (120-1) and a negative main busbar (120-2), and each of the positive main busbar (120-1) and the negative main busbar (120-2) is connected to a battery management system (BMS) (210). Through this structure, electrical energy generated in the battery cells (110) can be transferred to the outside, or electrical energy supplied from the outside can be used to charge the battery cells (110).

[0063] Referring to FIG. 7, the battery cell (110) may be provided with a battery can (116). For example, the battery can (116) has a cylindrical can shape with a closed bottom, and a jelly roll electrode assembly (not shown) is inserted inside. The battery cell (110) may include 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 limited to a cylindrical shape for the battery cell case, and a pouch shape, a prismatic shape, a coin shape, etc., may be applied.

[0064] The positive electrode 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 electrode 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 arranged so that a wire member (140) makes direct contact.

[0065] The electrode terminal portion (113) of each battery cell (110) of the above battery cell assembly (100) is provided on a cap plate (115) located on the upper part of the battery cell (110). For example, both the positive terminal (111) and the negative terminal (112) may 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 may perform the role of the negative terminal (112). Therefore, when each battery cell (110) is assembled into the battery cell assembly (100), the positive terminal (111) and the negative terminal (112) are exposed on the upper part of the battery cell assembly (100) and can be easily connected to the main busbar (120).

[0066] Referring to FIGS. 2 to 5, the cell frame (130) is configured to accommodate a plurality of battery cells (110) inside. The cell frame (130) 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. The cell frame (130) may have an upper frame (131) with an open bottom and a lower plate (135) configured to be coupled to the lower part of the upper frame (131). For example, the cell frame (130) may have an upper wall (130a), a lower wall (130b), a front wall (130c), a rear wall (130d), a left wall (130e), and a right wall (130f). For example, the upper frame (131) can form an upper wall (130a), a front wall (130c), a rear wall (130d), a left wall (130e), and a right wall (130f). Additionally, the lower plate (135) can form a lower wall (130b).

[0067] For example, referring to FIG. 5, the main busbar (120) may be positioned in the edge area (A) of the upper side wall (130a) of the cell frame (130). For example, the sub-busbar (125) may be positioned in the central area (B) of the upper side wall (130a) of the cell frame (130).

[0068] Multiple battery cells (110) can be inserted into and embedded in a cell frame (130). Specifically, the lower portions of the battery cells (110) are fitted into cell spacers (133) provided on a lower plate (135) to fix the arrangement. Here, the cell spacers (133) are provided to fix the lower portions of the battery cells (110) in the correct position and maintain the spacing between the battery cells (110). Subsequently, the upper frame (131) is combined with the lower plate (135) to completely enclose the battery cells (110). For example, the upper frame (131) may be joined to or bolted to the lower plate (135). At this time, a fixing structure (not shown) for fixing each of the multiple battery cells (110) may be provided inside the upper frame (131).

[0069] FIG. 9 is a schematic perspective view showing the appearance of a main busbar (120) according to one embodiment of the present invention. FIG. 10 is a partial perspective view showing a part of a battery cell assembly (100) according to one embodiment of the present invention. FIG. 11 is a partial plan view showing the appearance of the main busbar (120) and the prevention ribs (136, 137, 138) of the battery cell assembly (100) according to one embodiment of the present invention.

[0070] Referring to FIGS. 9 to 11, the main busbar (120) is mounted on a cell frame (130) and electrically connected to a battery cell (110). The main busbar (120) may include an electrical conductor made of metal and may have a plate shape that is bent at least once.

[0071] The main busbar (120) may include a terminal connection portion (122) and a raised portion (121). Additionally, the main busbar (120) may include a raised portion (121), a terminal connection portion (122), and a BMS connection portion (123). Referring to FIG. 4 and FIG. 10, the terminal connection portion (122) is provided to be in direct contact with one end of the wire member (140). As shown in FIG. 10, the terminal connection portion (122) may be mounted on a cell frame (130), and, for example, the terminal connection portion (122) may be mounted on an upper side wall (130a). The terminal connection portion (122) extends along the surface of the cell frame (130) (the surface of the upper side wall (130a)). The above terminal connection part (122) is provided to be immersed into the potting part (150), so as to maintain an electrical connection while being protected from the external environment.

[0072] Additionally, the raised portion (121) may have a height greater than the filled height of the potting portion (150). The raised portion (121) has a shape that is bent upward and extended from the terminal connection portion (122). The raised portion (121) may extend along a direction away from the upper side wall (130a) from the terminal connection portion (122). The raised portion (121) may extend approximately orthogonally to the terminal connection portion (122), and the raised portion (121) may have a apex portion (121a) located at the highest height relative to the upper side wall (130a). The apex portion (121a) is located at a height greater than the filled height of the potting portion (150). The raised portion (121) may have an approximately U-shape. The above-mentioned raised portion (121) has a portion including the apex portion (121a) exposed outside the potting portion (150) and extends higher than the filled height of the potting portion (150).

[0073] This structure can effectively prevent the potting section (150) from overflowing by securing a height higher than the filled height of the potting section (150). The raised section (121) prevents the potting section (150) from overflowing beyond the main busbar (120), thereby increasing the stability of the electrical connection.

[0074] Additionally, the BMS connection portion (123) is bent downward and extended from the raised portion (121) and is provided to be connected to a battery management system (BMS) (210). The BMS connection portion (123) may be extended in a direction toward the lower plate (135). Additionally, the BMS connection portion (123) may be arranged in a form approximately orthogonal to the terminal connection portion (122). The raised portion (121) may have an approximately U-shape, with one end connected to the terminal connection portion (122) and the other end connected to the BMS connection portion (123). The raised portion (121), the terminal connection portion (122), and the BMS connection portion (123) may be formed integrally.

[0075] The wire member (140) may include a first wire member (141) and a second wire member (142). The first wire member (141) electrically connects the main busbar (120) and the battery cell (110). The second wire member (142) electrically connects the sub-busbar (125) and the battery cell (110). The wire member (140) is made of a metal material. The wire member (140) is manufactured by extruding molten metal into a linear shape to connect the terminal connection portion (122) of the main busbar (120) and the electrode terminal of the battery cell (110), and then hardening to become rigid.

[0076] For example, as shown in FIG. 4 and FIG. 10, the battery cell assembly (100) of the present invention may be provided with two or more wire members (140) connected to one electrode terminal (111, 112). For example, two wire members may be electrically connected to the positive terminal (111), and two wire members may be electrically connected to the negative terminal (112).

[0077] Since multiple current paths are formed between the electrode terminals (111, 112) and the main busbar (120) through multiple wire members (140), the effect of reducing current resistance is achieved. That is, the multiple wire members (140) are connected in parallel with each other, which has the effect of reducing the resistance of the flowing current.

[0078] The above potting section (150) can be filled into the interior of the cell frame (130). Specifically, the cell frame (130) is provided with an injection hole (139) through which a liquid potting material is injected into the interior of the cell frame (130). The potting material begins to fill from the bottom of the interior of the cell frame (130) and moves upward, eventually filling up to the main busbar (120), sub-busbar (125), and wire member (140) areas. During this process, at least a portion of each of the main busbar (120), sub-busbar (125), and wire member (140) may be immersed (covered) by the potting section (150).

[0079] Additionally, the cell frame (130) is provided with a barrier wall (132) at the edge of the upper wall (130a). The barrier wall (132) is formed higher than the filling height of the potting section (150) to prevent liquid potting material from overflowing outside the cell frame (130).

[0080] For example, the barrier wall (132) may be formed continuously along the edge of the upper wall (130a) along the circumferential direction of the upper wall (130a). The potting portion (150) may be filled within the space enclosed by the barrier wall (132). The terminal connection portion (122) is located within the space enclosed by the barrier wall (132). The raised portion (121) has a apex portion (121a) that is higher than the height of the barrier wall (132), and the BMS connection portion (123) is located outside the barrier wall (132).

[0081] In addition, the raised portion (121) of the main busbar (120) is formed higher than the filling height of the potting portion (150), so that overflow of the potting portion (150) can be prevented together with the barrier wall (132). Therefore, the present invention can effectively prevent leakage of potting material that may occur during the potting process due to these structural features.

[0082] For example, the potting portion (150) can be formed using an insulating resin such as epoxy resin, urethane resin, or silicone resin, and can protect and insulate the battery cell (110) and other components. The potting portion (150) can fill the space between the battery cells (110) to fix the battery cells (110), perform electrical insulation between the multiple battery cells (110), and protect the battery cells (110) from external shocks.

[0083] The above sub-busbar (125) is provided to connect a plurality of battery cells (110) in series or in parallel. The external shape of the sub-busbar (125) can be formed considering the arrangement of the battery cells (110). The sub-busbar (125) may have a flat plate shape. The sub-busbar (125) is joined to a second wire member (142) connected to the electrode terminal portion (113) of the battery cell (110).

[0084] FIG. 12 is a vertical cross-sectional view showing a part of a battery cell assembly according to one embodiment of the present invention.

[0085] Referring to FIGS. 2 through 10 and FIG. 12, the BMS connection portion (123) of the main bus bar (120) can be bent downward from the ridge (121) to be combined with the BMS connection bus bar (220) electrically connected to the battery management system (210).

[0086] Additionally, a connection port (127) is formed in the BMS connection part (123) to allow a connection bolt (212) to be inserted. The connection bolt (212) may be provided to connect the BMS connection part (123) and the BMS connection busbar (220).

[0087] Referring to FIGS. 2 and FIGS. 8, the positive main busbar (120-1) and the negative main busbar (120-2) can each be electrically connected to the positive BMS connection busbar (220) and the negative BMS connection busbar (not shown), and the positive BMS connection busbar (220) and the negative BMS connection busbar can be electrically connected to the battery management system (210).

[0088] Accordingly, the present invention enables stable protection and fixation of the battery management system (210) through this combined structure, and the connection structure between the BMS connection part (123) of the main busbar (120) and the battery management system (210) can improve the reliability and performance of the battery cell assembly (100) through efficient space utilization.

[0089] Referring to FIGS. 7 through 12, the cell frame (130) may include a first prevention rib (136). Additionally, the cell frame (130) may include a second prevention rib (137) and a third prevention rib (138). Additionally, the cell frame (130) may include the first prevention rib (136), the second prevention rib (137), and the third prevention rib (138).

[0090] The first prevention rib (136) may be provided at the lower part of the raised portion (121) of the main busbar (120). The first prevention rib (136) may have a shape that is upright in the vertical direction (Z-axis direction). At this time, the first prevention rib (136) does not necessarily need to be formed higher than the filled height of the potting portion (150), but may be formed higher depending on the situation. The first prevention rib (136) may be provided to block the flow of the potting portion (150).

[0091] For example, as shown in FIG. 12, the upper portion (136a) of the first prevention rib (136) may be provided to support the lower portion (121b) of the raised portion (121) of the main bus bar (120) in an upward direction (Z-axis direction) or to come into contact with the lower portion (121b) of the raised portion (121). Through this, the present invention can stably mount the main bus bar (120) on the cell frame (130).

[0092] For example, as shown in FIG. 11, the second prevention rib (137) and the third prevention rib (138) are provided on each side of the main busbar (120) and can be formed in a shape that is higher than the filled height of the potting section (150) in the vertical direction (Z-axis direction) to cover the side of the raised section (121). This structure effectively prevents the potting section (150) from overflowing through the side of the main busbar (120).

[0093] In particular, a second prevention rib (137) and a third prevention rib (138) can be connected to each of the two sides of the first prevention rib (136), and can be arranged to form an overall H shape in the direction facing the upper wall (130a). This allows for more complete prevention of overflow in the potting section (150).

[0094] For example, as shown in FIG. 11, the second prevention rib (137) and the third prevention rib (138) may be extended along the direction (Y-axis direction) in which the ridge (121) crosses the first prevention rib (136). At this time, each of the second prevention rib (137) and the third prevention rib (138) may be formed to be longer than the length in the extension direction (Y-axis direction) of the ridge (121). Each of the second prevention rib (137) and the third prevention rib (138) may be extended along the extension direction (Y-axis direction) of the ridge (121) from a point parallel to the connection portion between the ridge (121) and the terminal connection portion (122).

[0095] Accordingly, a battery cell assembly (100) related to one embodiment of the present invention can more effectively prevent overflow of the potting portion (150) by providing first, second, and third prevention ribs (136, 137, 138) on the cell frame (130). In particular, the second prevention rib (137) and the third prevention rib (138) are connected to each side of the first prevention rib (136) to form an overall H shape, thereby preventing overflow of the potting portion (150) more completely.

[0096] FIG. 13 is a side view showing the appearance of a moving means (300) according to one embodiment of the present invention.

[0097] Referring to FIGS. 9, 10 and 13, a battery pack (200) including a battery cell assembly (100) according to one embodiment of the present invention may be provided. The battery pack (200) may be configured to include a plurality of battery cell assemblies (100) and may provide a larger capacity and output.

[0098] Additionally, the battery pack (200) may further include a battery management system (210). The battery management system (210) is an electronic device that monitors and controls information such as the state of charge (SOC), temperature, voltage, and current of each battery cell (110) in real time. This allows the safety and efficiency of the battery pack (200) to be maximized.

[0099] Referring to FIG. 13, a means of transportation (300) including a battery pack (200) according to one embodiment of the present invention may be provided. For example, the battery pack (200) may be embedded inside the means of transportation (300). The means of transportation (300) may include various types of electric-driven means of transportation such as electric vehicles, electric motorcycles, electric bicycles, and electric scooters.

[0100] Accordingly, the moving means (300) of the present invention effectively prevents overflow of the potting portion (150) by this configuration and includes a battery pack (200) capable of high-output discharge by minimizing the length of the wire member (140), thereby enabling high performance through high-output discharge of the battery pack (200).

[0101] 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.

[0102] According to a battery cell assembly, battery pack, and transport means related to one embodiment of the present invention, overflow of the potting portion can be effectively prevented and the length of the wire member can be minimized.

Claims

1. Multiple battery cells; A cell frame provided to accommodate the above-mentioned plurality of battery cells inside; A main busbar mounted on the cell frame and electrically connected to the plurality of battery cells; A wire member electrically connecting the main busbar and the plurality of battery cells; and A potting portion provided to surround a portion of the wire member and the main busbar; comprising A battery cell assembly characterized in that the main busbar comprises a terminal connection portion to which the wire member is connected, and a protrusion extending from the terminal connection portion such that it has a height greater than the filled height of the potting portion.

2. In Paragraph 1, The above terminal connection portion is mounted on the cell frame and is provided to be immersed into the potting portion, and A battery cell assembly characterized by further including: a main busbar extending from the raised portion and a BMS connection portion arranged to be connected to a battery management system.

3. In Paragraph 2, The above-mentioned protrusion is bent upward from the above-mentioned terminal connection portion, and A battery cell assembly characterized in that the above-mentioned BMS connection portion is bent downward from the above-mentioned ridge portion.

4. In Paragraph 2, The above BMS connection part has a connection port formed therein for inserting a connection bolt, and A battery cell assembly characterized by the above-mentioned connecting bolt being provided to connect the BMS connection part and the BMS connection busbar.

5. In Paragraph 1, The above cell frame is, A battery cell assembly characterized by including a first prevention rib having an upright shape and provided at the lower part of the above-mentioned protrusion.

6. In Paragraph 5, A battery cell assembly characterized in that the upper end of the first prevention rib is arranged to contact the lower surface of the raised portion of the main busbar.

7. In Paragraph 1, The above cell frame is, A battery cell assembly characterized by including a second prevention rib and a third prevention rib having a height greater than the filled height of the potting portion to cover the sides of the raised portions, respectively.

8. In Paragraph 7, Each of the above second and third prevention ribs is, A battery cell assembly characterized by being extended along the upward direction of the above-mentioned ridge.

9. In Paragraph 1, A battery cell assembly characterized in that the above-mentioned wire member is arranged so that the entire area is immersed by the above-mentioned potting portion.

10. In Paragraph 1, It further includes a sub-busbar arranged to connect the plurality of battery cells in series or in parallel, and The above main busbar is positioned at the upper side wall edge of the cell frame, and A battery cell assembly characterized in that the above-mentioned sub-busbar is disposed on the inner side of the upper side wall of the cell frame.

11. In Paragraph 10, The above wire member is, A first wire member provided to be coupled to the main busbar above, and A battery cell assembly characterized by including a second wire member arranged to be coupled with the above-mentioned sub-busbar.

12. In Paragraph 10, The above main busbar has only a partial area covered by the above-mentioned porting part, and A battery cell assembly characterized in that the entire area of ​​the above-mentioned sub-busbar is covered by the above-mentioned potting portion.

13. In Paragraph 10, A battery cell assembly characterized in that the cell frame includes a barrier wall formed at the edge of the upper side wall that is higher than the filling height of the potting portion.

14. A battery cell assembly according to any one of claims 1 to 13, and A battery pack including a battery management system.

15. A means of transportation including a battery pack pursuant to paragraph 14.

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