Battery pack and vehicle that includes it.

Description

1 / 24 A set of batteries and a vehicle that includes the same field of technology.

[001] The present invention relates to a battery pack and, more specifically, relates to a battery pack configured to rapidly discharge the vent gas generated by a drive cell to the outside of the pack case and rapidly and efficiently dissipate heat to the pack case by conduction, thereby suppressing the risk of ignition in the battery pack and a vehicle that includes the same.

[002] This request claims priority for the Request of Korean Patent Number 10-2023-0123393, filed on September 15, 2023 in the Republic of Korea, the description of which is incorporated herein by reference. BACKGROUND OF THE TECHNIQUE

[003] Recently, the demand for portable electronic products, such as laptops, video cameras, and mobile phones, has increased rapidly, and the development of electric vehicles, energy storage batteries, robots, satellites, and the like has accelerated. Thus, in line with this, active research on high-performance secondary batteries, capable of being repeatedly charged and discharged, is underway.

[004] Commercially available secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries stand out for their advantages of free charging and discharging, very low self-discharge rate, and high energy density, as they have virtually no memory effect compared to nickel-based secondary batteries.

[005] These secondary lithium batteries generally use lithium-based oxides and carbon materials as active materials. Petition 870250089876, dated 02 / 10 / 2025, p. 9 / 57 2 / 24 positive and negative electrodes, respectively. In addition, secondary lithium batteries include positive and negative electrode plates coated with the active materials of the positive and negative electrodes, respectively, an electrode assembly in which the positive and negative electrode plates are arranged with a separator between them, and an outer casing that seals and stores the electrode assembly with an electrolyte.

[006] Meanwhile, secondary lithium batteries can be classified, depending on the shape of a battery case, into pouch-type secondary batteries, in which the electrode assembly is housed in a pouch made of laminated aluminum sheet, and container-type secondary batteries, in which the electrode assembly is housed in a metal container. Furthermore, container-type secondary batteries can be further classified into cylindrical batteries and prismatic batteries, depending on the shape of the metal container. To provide high voltage and high current, secondary lithium-ion batteries are being used as a battery module or battery pack obtained by superimposing or stacking multiple battery cells as they are, or mounted in cartridges or similar containers to assemble them into a dense structure and then electrically connecting them.

[007] Recently, research and development has been active in battery packs configured to include a single module or cell pack with improved structural rigidity, densely arranging a plurality of cylindrical battery cells in the upright state and a surrounding assembly structure. Specifically, the single module or cell pack is trending towards increasing in size.

[008] However, if a thermal event, such as thermal runaway, occurs in any battery cell within the cell array of Petition 870250089876, dated 02 / 10 / 2025, page 10 / 57 3 / 24 large area, the fuel gas activated in the drive cell is ejected, and the ignited drive cell itself becomes a heating electrode and these become ignition sources, causing heat buildup, which can lead to a cascade of heat transfer to adjacent battery cells and explosion of the entire battery pack.

[009] Therefore, it is desperately required to suppress the risk of ignition and to delay or block heat transfer in the battery pack by means of a venting structure capable of rapidly discharging the vent gas released by the drive cell to the outside of the pack case and a heat dissipation structure capable of rapidly and efficiently conducting high temperature or similar heat generated by the drive cell to the outside before it accumulates. INVENTION Technical Problem

[0010] The present invention was designed to solve the problems of the related art and, therefore, the present invention is directed to providing a battery pack in which the vent gas generated from the drive cell can be rapidly discharged to the outside of the battery case through a second vent path, which is provided as a separate structure to communicate with a first vent path formed below the cell network structure, and in which the high temperature or similar heat generated by the drive cell can be rapidly and efficiently conducted to the battery case through a cooling tube and a port block and then dissipated before it accumulates, thereby suppressing the risk of ignition of the battery pack and delaying or blocking heat transfer therein.

[0011] The technical problems that the present invention seeks to solve Petition 870250089876, dated 02 / 10 / 2025, page 11 / 57 4 / 24 solver problems are not limited to the problems mentioned above, and other problems not mentioned above will be clearly understood by those skilled in the art of the invention described below. Technical Solution

[0012] According to one aspect of the present invention, a battery assembly is provided comprising: a cell network structure comprising a plurality of battery cells; an assembly box configured to accommodate the cell network structure and form a first ventilation path below the cell network structure; and a lower casing disposed at one end of the cell network structure within the battery box and configured to form a second ventilation path communicating with the first ventilation path.

[0013] The second ventilation path can be formed perpendicular to the first ventilation path.

[0014] A plurality of ventilation holes can be formed in the lower casing in positions corresponding to the first ventilation path in the longitudinal direction.

[0015] The assembly box may have at least one ventilation valve provided on both sides thereof.

[0016] The vent gas generated from the battery cell can be discharged outwards through the vent valve, passing through the first vent path and the second vent path.

[0017] The assembly box may include a bottom plate configured to partially contact and support the bottom of the lattice structure and which has a longitudinal cross-section in a concave-convex shape, and the first ventilation path may be formed by the concave-convex shape. Petition 870250089876, dated 02 / 10 / 2025, p. 12 / 57 5 / 24

[0018] The cell network structure may include: a plurality of unit cell groups, which includes the plurality of battery cells and a cooling tube attached to the plurality of battery cells; and a side structure disposed between the plurality of unit cell groups, and the first ventilation path may be formed parallel to the direction in which the plurality of battery cells, the cooling tube and the side structure are arranged side by side.

[0019] The concave-convex form can be understood by a convex section configured to contact and support the cell network structure and a concave section recessed from the convex section to form the first ventilation path. The convex section can be arranged in contact with the bottom of the lateral structure. The concave section can be arranged to be spaced from the bottom of the unit cell group, and the first ventilation path can be a space formed between the lower surface of the unit cell group and the concave section.

[0020] A battery pack, according to the present invention, may include: a cell network structure comprising a plurality of battery cells; a pack box configured to accommodate the cell network structure; and a gate block connecting the cell network structure and the pack box to each other and configured to conduct the heat generated by one of the battery cells to the pack box, thereby forming a heat dissipation path.

[0021] The battery pack may also include a lower housing disposed at one end of the cell network structure within the pack case.

[0022] The gate block may be provided to extend outward from one end of the cell network structure, and the lower enclosure may be arranged to be lower than the structure of Petition 870250089876, dated 02 / 10 / 2025, page 13 / 57 6 / 24 cell network, so that the gate block is supported on the upper surface of the lower housing.

[0023] The battery pack according to the claim may include a heat transfer member interposed between the lower casing and the door block.

[0024] The cell network structure may also include a plurality of battery cells and a cooling tube attached to the plurality of battery cells, and the cooling tube may be provided to communicate with the gate block.

[0025] The heat dissipation path can be formed from the battery cell to the cooling tube, the port block and the assembly box, or from the battery cell to the assembly box through the cooling tube, the port block and the bottom casing.

[0026] Furthermore, according to the present invention, a vehicle that includes the battery pack described above can be provided. Advantageous Effects

[0027] According to one aspect of the present invention, the second ventilation path is provided as a separate structure to communicate with the first ventilation path formed below the cell network structure, thereby rapidly discharging the ventilation gas generated by the drive cell to the outside of the battery box.

[0028] According to another aspect of the present invention, the high-temperature heat generated in the drive cell is able to be rapidly and efficiently conducted to the battery box through the cooling tube and the port block and then dissipated before accumulating, thereby suppressing the risk of ignition of the battery pack and delaying or blocking heat transfer therein.

[0029] The effects obtainable with the present invention are not Petition 870250089876, dated 02 / 10 / 2025, page 14 / 57 7 / 24 limited to the effects mentioned above, and other effects not mentioned above will be clearly understood by those skilled in the art of the invention described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings illustrate a preferred embodiment of the present invention and, together with the detailed description of the invention, serve to provide a better understanding of the technical idea of ​​the present invention and, thus, the present invention is not interpreted as being limited to the drawings.

[0031] Figure 1 is a perspective view of a battery pack according to an embodiment of the present invention.

[0032] Figure 2 is an exploded perspective view illustrating the primary elements of the battery pack in Figure 1.

[0033] Figure 3 is a perspective view of a battery pack from which a top cover plate is removed, according to an embodiment of the present invention.

[0034] Figure 4 is a perspective view of an assembly box and a lower housing in a battery pack according to an embodiment of the present invention.

[0035] Figure 5 is a top view of the battery pack shown in Figure 4.

[0036] Figure 6 is a diagram illustrating a cell network structure applied to a battery pack according to an embodiment of the present invention.

[0037] Figure 7 is a perspective view of a block of tubes connected to the cooling tube of Figure 6.

[0038] Figure 8 is a diagram illustrating an upper portion of a cell network structure housed in a battery pack, according to an embodiment of the present invention.

[0039] Figure 9 is a perspective view in longitudinal section. Petition 870250089876, dated 02 / 10 / 2025, page 15 / 57 8 / 24 of a battery pack, according to one embodiment of the present invention.

[0040] Figure 10 is a partially enlarged view of a longitudinal cross-section of a battery pack, according to an embodiment of the present invention.

[0041] Figure 11 is a diagram illustrating the path of ventilation gas movement in a battery assembly, according to an embodiment of the present invention.

[0042] Figure 12 is a diagram illustrating a heat dissipation path through which heat is conducted and dissipated from a heating electrode in a battery pack, according to one embodiment of the present invention.

[0043] Figure 13 is a diagram illustrating a vehicle according to an embodiment of the present invention. BEST WAY

[0044] Hereafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and appended claims should not be interpreted as limited to general and dictionary meanings, but interpreted based on the meanings and concepts that correspond to the technical aspects of the present invention, based on the principle that the inventor is permitted to define the terms appropriately for the best explanation.

[0045] Therefore, the configurations proposed in the embodiments and drawings of this specification indicate only the most preferable embodiment of the present invention and do not represent all the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications may be made to this invention at the time of filing the application. Petition 870250089876, dated 02 / 10 / 2025, p. 16 / 57 9 / 24

[0046] The sizes of the respective elements or specific parts of each element shown in the accompanying drawings are exaggerated, omitted, or simplified for the sake of explanation and clarity. Consequently, the sizes of the respective elements do not entirely reflect their actual sizes. Descriptions of known relative functions or configurations, which may obscure the subject matter of the present invention, will be omitted.

[0047] Figure 1 is a perspective view of a battery pack according to an embodiment of the present invention, and Figure 2 is an exploded perspective view illustrating the primary elements of the battery pack in Figure 1.

[0048] Referring to Figures 1 and 2, a battery set 10 according to an embodiment of the present invention may include a cell network structure 100, which includes a plurality of battery cells 112, a set box 200 that accommodates the cell network structure 100 and a busbar set 300.

[0049] Referring to Figure 2, the cell network structure 100 may include a plurality of battery cells 112.

[0050] The plurality of battery cells 112 can be secondary batteries and can be provided as cylindrical secondary batteries, pouch-type secondary batteries, or prismatic secondary batteries. Hereinafter, the present embodiment will be described on the assumption that the plurality of battery cells 112 is provided as cylindrical secondary batteries. These battery cells 112 can be a plurality of cylindrical secondary batteries arranged in the horizontal direction, while positioned in the up / down direction.

[0051] The plurality of 112-foot battery cells as described above can be stacked in the horizontal direction or in a horizontal plane (XY plane), as shown in Figure 2. Furthermore, a Petition 870250089876, dated 02 / 10 / 2025, page 17 / 57 A cooling structure 112 may be interposed between the plurality of battery cells 112, or a structure (the lateral structure 130 to be described later) that maintains the distance between the battery cells 112 may be coupled to form a cell network structure 100, which is a set of single battery cells 112.

[0052] Although the 100-cell network structure will be described in detail later, it can be a single unit (structure) configured on a flat plate that has a predetermined thickness (e.g., the height of the 112 battery cell). Furthermore, the 100-cell network structure can have a large area. Such a single structure having a large area can ensure a certain level of structural rigidity.

[0053] A 400 port block connected to the cooling pipe 115 can be provided on one side of the 100-cell network structure for design. The configuration and operational effects of the 400-port block will be described in detail later.

[0054] Figure 3 is a perspective view of a battery pack from which a top cover plate is removed, according to an embodiment of the present invention, Figure 4 is a perspective view of a battery pack box and a bottom housing 250 in a battery pack, according to an embodiment of the present invention, and Figure 5 is a top view of the battery pack shown in Figure 4.

[0055] Referring to Figures 3 to 5 and Figures 1 and 2 above, the assembly box 200 can accommodate the cell lattice structure 100. As shown in Figures 2 and 3, the assembly box 200 can include a bottom plate 210, an outer side wall 220 arranged on the edge of the bottom plate 210, and a top cover plate 230. Here, the cell lattice structure 100 can be accommodated in the internal space formed by the bottom plate 210, the outer side wall 220, and the top cover plate 230. Petition 870250089876, dated 02 / 10 / 2025, page 18 / 57 11 / 24 terna 220 and the top cover plate 230.

[0056] The backplate 210 can be placed at the bottom of the cell lattice structure 100. The backplate 210 can partially contact the cell lattice structure 100 at the bottom thereof, thereby supporting it.

[0057] To this end, the bottom plate 210 can be configured to have a longitudinal cross-section of a concave-convex shape in one direction, as shown in Figure 4. The convex structure and the concave structure can be formed parallel to the longitudinal direction (the geometric X-axis direction) of the battery array 10. Furthermore, the concave-convex shape can be formed in one direction (the geometric Y-axis direction) perpendicular to the direction (the geometric X-axis direction) in which the plurality of battery cells 112, the cooling tube 115, and the side structures 130 are arranged side by side. In addition, the concave-convex shape can form a first ventilation path P1.

[0058] Specifically, the concave-convex form can be understood from a convex section 211 that contacts and supports the cell lattice structure 100, and a concave section 212 that is provided to be recessed from the convex section 211. Herein, the cell lattice structure 100 can contact the convex section 211 so as to be seated and supported thereon. Furthermore, the concave section 212 can be formed to be recessed from the convex section 211. As described above, the first ventilation path P1 can be formed in the space between the convex sections 211, that is, in the concave section 212. That is, the first ventilation path P1 can be a space formed between the lower surface of the unit cell group and the concave section 212. Consequently, the first ventilation path P1 can be provided in the bottom plate 210 of the assembly box 200 in the direction (the geometric axis direction X) Petition 870250089876, dated 02 / 10 / 2025, page 19 / 57 12 / 24 in which the plurality of battery cells 112, the cooling tube 115 and the side structure 130 are arranged in a row.

[0059] The outer side wall 220 indicates a type of structure that has a predetermined height and is arranged on the outer edge, and the bottom plate 210 can be coupled to the bottom of the outer side wall 220. The outer side wall 220 may have a cavity therein and may be provided with a plurality of reinforcing partitions 221 (see Figures 10 and 11). The outer side wall 220 may have at least one ventilation valve 260 provided on both sides thereof to be connected to a second ventilation path P2, which will be described later.

[0060] Meanwhile, in the battery pack 10 according to the present embodiment, the pack box 200 may also include a lower housing 250 and a vent valve 260, forming a second vent path P2.

[0061] Referring to Figures 2, 4 and 5, the lower casing 250 can be arranged at one end of the cell network structure 100, inside the assembly box 200. Furthermore, the lower casing 250 can be arranged lower than the cell network structure 100.

[0062] This lower casing 250 can form a second ventilation path P2. The second ventilation path P2 can be formed perpendicular to the first ventilation path P1. That is, the second ventilation path P2 can be formed in the direction (the geometric Y-axis direction) perpendicular to the direction (the geometric X-axis direction) in which the plurality of battery cells 112, the cooling tube 115, and the side structure 130 are arranged in a row. Furthermore, the length of the lower casing 250 can be substantially the same as the length of the cell network structure 100 in the width direction. Consequently, both Petition 870250089876, dated 02 / 10 / 2025, page 20 / 57 13 / 24 The ends of the lower casing 250 can be arranged to almost reach the inner walls of the outer side wall 220, arranged on both sides of the assembly box 200, in the width direction.

[0063] The lower casing 250 may have a plurality of ventilation holes 251 formed in the longitudinal direction in positions corresponding to the first ventilation path P1. The first ventilation path P1 and the second ventilation path P2 of the lower casing 250 may communicate with each other through the ventilation hole 251. Consequently, the ventilation gas and similar gases generated from a drive cell may be vented in the geometric X-axis direction through the first ventilation path P1 below the cell network structure 100, introduced into the lower casing 250 through the ventilation hole 251 and then rapidly discharged towards the outer side wall 220 (in the geometric Y-axis direction) through the second ventilation path P2.

[0064] In addition, vent valve 260 may be provided in the assembly box 200. At least one vent valve 260 may be provided in the outer side wall 220. The vent valve 260 may be configured to forcibly discharge vent gas from the assembly box 200 to the outside. For example, a pair of vent valves 260 may be provided in the outer side wall 220 of the assembly box 200, where both ends of the lower casing 250 make contact. The vent gas or similar discharged through the first vent path P1 and the second vent path P2 described above is rapidly discharged to the outside through the vent valve 260 adjacent to them.

[0065] According to the present embodiment, the ventilation gas generated by the drive cell can be rapidly discharged. Petition 870250089876, dated 02 / 10 / 2025, p. 21 / 57 14 / 24 of this is done through the first ventilation path P1 formed below the cell network structure 100 and the second ventilation path P2. That is, it can be quickly vented to the edge of the assembly box 200 and then quickly discharged to the outside through the ventilation valve 260. In this process, adverse effects on adjacent battery cells 112 or other components can be minimized.

[0066] Hereafter, the cell network structure 100 and the gate block 400, according to an embodiment of the present invention, will be described in detail.

[0067] Figure 6 is a diagram illustrating a cell network structure applied to a battery pack, according to an embodiment of the present invention, and Figure 7 is a perspective view of a gate block connected to the cooling tube in Figure 6.

[0068] Referring to Figures 6 and 7 and Figure 2 above, the cell network structure 100 may include a unit cell group 110 which includes a plurality of battery cells 112 and a cooling tube 115 attached to the plurality of battery cells 112, and a lateral structure 130 disposed between the plurality of unit cell groups 110.

[0069] Battery cell 112 may have a tab portion 113 and a top surface 114 on top. The tab portion 113 may have a first polarity, and the top surface 114 may have a second polarity. The tab portion 113 and the top surface 114 may be electrically isolated from each other. The first polarity may correspond to a positive electrode of battery cell 112, and the second polarity may correspond to a negative electrode of battery cell 112. That is, the tab portion 113 may be a positive electrode of battery cell 112, and the top surface 114 may be Petition 870250089876, dated 02 / 10 / 2025, page 22 / 57 15 / 24 a negative electrode of battery cell 112. The tabbed portion 113 may be provided to project from the upper surface 114. Alternatively, the tabbed portion 113 may be configured not to project from the upper surface 114. For example, this may be configured in a so-called tabless structure, in which the tabbed portion 113 is arranged in the same plane as the upper surface. As the configurations of battery cell 112 are widely known to those skilled in the art at the time of filing of the present invention, detailed descriptions thereof will be omitted from this specification.

[0070] A plurality of such battery cells 112 may constitute a cell network 111. That is, cell networks 111 may have a plurality of battery cells arranged in a row in the longitudinal direction (the geometric X-axis direction) of the battery set 10. The number of battery cells 112 constituting the cell network 111 is not limited.

[0071] Furthermore, the unit cell group 110 may include a pair of cell lattices 111 and a cooling tube 115 between them. That is, the unit cell group 110 may include a pair of (two) cell lattices 111 and a cooling tube 115 interposed between the pair of cell lattices 111. Here, the cooling tube 115 is an element that is in contact with one side of the cell lattice 111 to cool the battery cells 112. The cooling tube 115 may have an empty space through which a cooling medium flows and may come into contact with the outer surfaces of the plurality of battery cells 112, so that the heat generated by the battery cells 112 can be directly transferred to the cooling medium.

[0072] A 400 port block can be connected to one end of the 115 cooling pipe. The 400 port block can be Petition 870250089876, dated 02 / 10 / 2025, page 23 / 57 16 / 24 provided with ports 410a and 420b coupled to connecting tubes 410 and 420. In addition, the port block 400 is an element that constitutes a heat dissipation path, which will be described in detail later.

[0073] The group of unit cells 110 inevitably has a curved section because the plurality of battery cells 112 is arranged on its outer surface. Thus, the cell network structure 100 can have a lateral structure 130 that accommodates the curved section and maintains and fixes the distance between the plurality of battery cells 112.

[0074] The side structure 130 may be provided between the unit cell group 110 and a neighboring unit cell group 110, or at the front end of the unit cell group 110. Specifically, the side structure 130 may include a side structure 131 interposed between the unit cell groups 110 and a side wall 132 interposed between the assembly box 200 and the unit cell group 110.

[0075] The lateral structure 131 can be arranged between the pair of unit cell groups 110. The lateral structure 131 can be arranged between the unit cell group 110 and the neighboring unit cell group 110 to fix at least one pair of unit cell groups 110 and maintain the distance between the battery cells 112. As shown in Figures 2 and 3, the lateral structure 131 can have concave portions 131a formed that correspond to the external shape of the unit cell group 110 on one surface and on the other surface, respectively, in the longitudinal direction. The internal curvature or the number of concave portions 131a can be determined according to the specifications of the external surface of the unit cell group 110 or the battery cell 112 that is coupled to the lateral structure 131 by shape matching. Petition 870250089876, dated 02 / 10 / 2025, page 24 / 57 17 / 24

[0076] A pair of side walls 132 may be provided on both sides in the mounting direction (the geometric Y-axis direction) in which the unit cell group 110 and the side frame 131 are mounted. The side wall 132 may be provided on the outermost portion of the cell lattice structure 100 in the width direction (the geometric X-axis direction). One side of the side wall 132 may have the concave portion 133 described above to receive one side of the unit cell group 110, and the other side (opposite side) may be configured to be flat so as to be in contact with the outer surface 220 of the assembly box 200. Consequently, the cell lattice structure 100 and the outer side wall 220 may be in contact with each other, removing the gaps between them.As described above, a plurality of unit cell groups 110 and a plurality of side structures 131 and side walls 132 can be assembled to configure a cell lattice structure 100. The cell lattice structure 100 with the above configuration can be a structure capable of ensuring structural rigidity without a separate module box.

[0077] Specifically, the side structure 130 can be arranged between the plurality of battery cells 112 in the cell network structure 100 or arranged on one side of the cell network 111, thereby fixing and supporting the plurality of battery cells 112. Furthermore, the side structure 130 can be fixed to the plurality of battery cells 112 to form a single structure as a cell network structure 100 having a larger area than those existing.

[0078] Hereafter, the heat dissipation configuration according to the present embodiment will be described.

[0079] Figure 8 is a diagram illustrating an upper portion of a cell network structure housed in a set of Petition 870250089876, dated 02 / 10 / 2025, p. 25 / 57 18 / 24 batteries, according to an embodiment of the present invention, Figure 9 is a longitudinal cross-sectional perspective view of the battery assembly according to an embodiment of the present invention; and Figure 10 is an enlarged view of a longitudinal cross-section of a battery assembly according to an embodiment of the present invention.

[0080] Referring to Figure 8 and Figures 2, 6 and 7 above, the battery pack 10, according to the present embodiment, may include a gate block 400 connected to the cell network structure 100.

[0081] The gate block 400 can be connected to one end of the cooling tube 115. The gate block 400 can be provided so that the gate block 400 and the cooling tube 115 communicate with each other. The gate block 400 can be provided to project from the side of the cell lattice structure 100. That is, the gate block 400 can be configured to project beyond the end of the side structure 130 in the assembled state of the cell lattice structure 100. The gate block 400 can have a space in which the cooling medium is temporarily stored and can be connected to the adjacent gate block 400 through a pair of connecting tubes 410 and 420. The upper connecting tube 410 of the gate block 400 can serve as an inlet passage for the cooling medium, and the lower connecting tube 420 can serve as an outlet passage for the cooling medium.Consequently, the introduced cooling medium can move along the connecting tubes 410 and 420 to be temporarily stored in the port block 400 and can enter and exit the cooling tube 115.

[0082] The 400-port block can partially connect the 100-cell network structure and the 200-set box and conduct the ca Petition 870250089876, dated 02 / 10 / 2025, p. 26 / 57 19 / 24 lor generated by any of the 112 battery cells to the 200 assembly box, thereby configuring a heat dissipation path.

[0083] Specifically, the gate block 400 can be provided to extend outward from one end of the cell network structure 100 and can partially connect the cell network structure 100 and the assembly box 200. That is, as shown in Figure 8, both ends of the gate block 400 can contact both the side of the cell network structure 100 and the outer side wall 220.

[0084] Referring to Figures 9 and 10, the lower enclosure 250 can be arranged at one end of the cell network structure 100 to be lower than the cell network structure 100. Consequently, the gate block 400 can be supported on the upper surface of the lower enclosure 250. Furthermore, one side of the lower enclosure 250 can be arranged in contact with the outer side wall 220.

[0085] A heat transfer member 450 may be included to be interposed between the lower casing 250 and the door block 400.

[0086] Consequently, the gate block 400 can be connected to the cooling tube 115 of the cell network structure 100, and the opposite side thereof can partially contact the outer side wall 220, so that the bottom of the gate block 400 can be supported in the lower housing 250 with the heat transfer member 450 interposed between them. That is, if high-temperature heat is generated in a heating electrode (ignition source), such as a drive cell, due to a thermal event, the generated high-temperature heat can be conducted to the cooling tube 115, transferred to the gate block 400, and then, Petition 870250089876, dated 02 / 10 / 2025, page 27 / 57 20 / 24 conducted to the assembly box 200 through the lower casing 250 in contact with the gate block 400, so that various other components, especially the assembly box 200, can function as thermal masses.

[0087] According to the present embodiment, the high temperature or similar heat generated in the drive cell can be quickly and efficiently conducted to the assembly box 200 through the cooling tube 115 and the door block 400 and then dissipated before accumulating, thereby suppressing the risk of ignition of the battery pack 10 and delaying or blocking heat transfer therein.

[0088] Figure 11 is a diagram illustrating the path of movement of the vent gas in a battery pack according to an embodiment of the present invention, and Figure 12 is a diagram illustrating a heat dissipation path through which heat is conducted and dissipated from a heating electrode in a battery pack, according to an embodiment of the present invention.

[0089] Hereafter, the vent gas flow generated from a drive cell of the cell network structure 100 in the battery pack 10 according to the present embodiment, will be described with reference to Figures 1 to 11.

[0090] First, the process of assembling the 100-cell network structure into the 200-assembly box will be briefly described.

[0091] Referring to Figure 6, a plurality of battery cells 112 is provided as a cell network 111, and a cooling tube 115 is interposed between a pair of cell networks 111 to be assembled into a unit cell group 110. A side frame 131 is interposed between the unit cell groups 110, and a side wall 132 is attached to the outermost portion of the battery pack. Petition 870250089876, dated 02 / 10 / 2025, page 28 / 57 21 / 24 in the width direction (the Y-axis geometric direction) to form a 100-cell lattice structure. The 100-cell lattice structure can be further coated with adhesive resin or structural resin. Additionally, the assembly of the 100-cell lattice structure may require separate assembly equipment or pressurization equipment.

[0092] Referring to Figures 3 and 11, the lower casing 250 can be coupled to the assembly box 200. The lower casing 250 can communicate with the first ventilation path P1 and can form the second ventilation path P2 perpendicular to the first ventilation path P1.

[0093] As shown in Figure 10, the cell network structure 100 can be placed in the assembly box 200. The convex section 211 can contact and support the bottom of the side structure 131 or the bottom of the side wall 132. When the cell network structure 100 is placed, the concave section 212 can be arranged to be spaced from the bottom of the unit cell group 110. As shown in Figures 3 and 4, the first ventilation path P1 can be formed as a space between the bottom of the unit cell group 110 and the concave section 212.

[0094] Referring to Figure 11, the second ventilation path P2 can be provided as a separate structure to communicate with the first ventilation path P1 formed below the cell network structure 100, thereby rapidly discharging the ventilation gas generated by the drive cell to the outside of the assembly box 200.

[0095] According to the present embodiment, the ventilation gas generated by the drive cell can be rapidly discharged through the first ventilation path P1 formed below the cell network structure 100 and the second ventilation path Petition 870250089876, dated 02 / 10 / 2025, page 29 / 57 22 / 24 P2. That is, the gas can be rapidly vented to the edge of the assembly box 200 and then rapidly discharged to the outside through the vent valve 260. In this process, as the high-temperature vent gas or similar is rapidly discharged without contacting the adjacent battery cells 112 or other components, adverse effects, such as heat buildup in adjacent components, can be minimized.

[0096] The process of heat dissipation will be explained next.

[0097] Referring to Figure 12, the heat dissipation path can be formed from battery cell 112 to cooling tube 115, port block 400 and assembly box 200, or from battery cell 112 to assembly box 200 via cooling tube 115, port block 400 and lower casing 250.

[0098] Specifically, the high-temperature heat generated in a heating electrode (ignition source), such as a drive cell, due to a thermal event, can be conducted to the cooling tube 115, transferred to the gate block 400, and then reach the assembly box 200 through the lower housing 250 in contact with the gate block 400. Alternatively, the heat can be conducted directly from the gate block 400 to the assembly box 200, thereby forming the heat dissipation path. Consequently, as described above, several other components, especially the assembly box 200, can function as thermal masses.

[0099] As described above, the high temperature heat generated in the drive cell is able to be quickly and efficiently conducted to the assembly box 200 through the cooling tube 115 and the port block 400 and then dissipated before accumulating, thereby suppressing the risk of ignition of the battery pack 10 and delaying or blocking heat transfer therein. Petition 870250089876, dated 02 / 10 / 2025, page 30 / 57 23 / 24

[00100] Meanwhile, referring back to Figure 2, the battery set 10 according to the present embodiment may include a busbar set 300. The busbar set 300 may be arranged in the cell network structure 100 to electrically connect the plurality of battery cells 112.

[00101] In addition, the battery pack 10, according to the present invention, although not shown, may also include various devices for controlling the charging and discharging of the battery pack 10, such as a BMS (Battery Management System), a current sensor, a fuse or the like.

[00102] Figure 13 is a diagram illustrating a vehicle according to an embodiment of the present invention.

[00103] Referring to Figure 13, the battery pack 10 according to the present invention can be applied to a vehicle V, such as an electric vehicle or a hybrid vehicle. That is, the vehicle V according to the present invention can include the battery pack 10 according to the present invention. The battery pack 10 can be installed in the vehicle body structure, under the vehicle seat or in the trunk, and the arrangement sequence of the battery pack 10 can be reversed, if necessary, when installed in the vehicle.

[00104] Meanwhile, although terms indicating directions such as up, down, left, right, forward and backward are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[00105] As described above, although the present invention has been described with reference to limited embodiments and designs, the present invention is not limited thereto, and various modifications and variations Petition 870250089876, dated 02 / 10 / 2025, p. 31 / 57 24 / 24 applications are possible within the technical idea of ​​the present invention and the scope of equivalence of the claims to be described below by those skilled in the art to which the present invention belongs. Petition 870250089876, dated 02 / 10 / 2025, p. 32 / 57

Claims

1 / 4 CLAIMS 1. Battery assembly, characterized in that it comprises: a cell network structure comprising a plurality of battery cells; an assembly box configured to accommodate the cell network structure and form a first ventilation path below the cell network structure; and a lower casing disposed at one end of the cell network structure within the assembly box and configured to form a second ventilation path communicating with the first ventilation path.

2. Battery assembly according to claim 1, characterized in that the second ventilation path is formed perpendicular to the first ventilation path.

3. Battery assembly according to claim 1, characterized in that a plurality of ventilation holes is formed in the lower casing in positions that correspond to the first ventilation path in the longitudinal direction.

4. Battery assembly according to claim 2, characterized in that the assembly case has at least one vent valve provided on both sides thereof.

5. Battery assembly according to claim 4, characterized in that the vent gas generated by the battery cell is discharged to the outside through the vent valve, passing through the first vent path and the second vent path.

6. Battery assembly according to claim 1, characterized in that the assembly box comprises a bottom plate configured to partially contact and support the bottom of the cell network structure and that it has a longitudinal cross-section in a concave-convex shape, and in which the first ventilation path is formed by the concave-convex shape.

7. Battery assembly according to claim 6, characterized in that the cell network structure comprises: a plurality of unit cell groups comprising the plurality of battery cells and a cooling tube attached to the plurality of battery cells; and a lateral structure disposed between the plurality of unit cell groups, wherein the first ventilation path is formed parallel to the direction in which the plurality of battery cells, the cooling tube and the lateral structure are arranged side by side.

8. Battery assembly according to claim 7, characterized in that the concave-convex shape comprises a convex section configured to contact and support the cell network structure and a concave section recessed from the convex section to form the first ventilation path, wherein the convex section is disposed in contact with the bottom of the lateral structure, wherein the concave section is disposed to be spaced from the bottom of the unit cell group, and wherein the first ventilation path is a space formed between the lower surface of the unit cell group and the concave section.

9. Battery pack characterized in that Petition 870250089876, dated 02 / 10 / 2025, page 34 / 57 3 / 4 comprises: a cell network structure comprising a plurality of battery cells; a housing configured to accommodate the cell network structure; and a gate block connecting the cell network structure and the housing to each other and configured to conduct the heat generated by one of the battery cells to the housing, thereby forming a heat dissipation path.

10. Battery pack according to claim 9, characterized in that it further comprises a lower casing disposed at one end of the cell network structure within the pack case.

11. Battery assembly according to claim 10, characterized in that the gate block is provided to extend outward from one end of the cell network structure, and in that the lower casing is arranged to be lower than the cell network structure, so that the gate block is supported on the upper surface of the lower casing.

12. Battery assembly, according to claim 10, characterized in that it comprises a heat transfer member interposed between the lower casing and the door block.

13. Battery pack according to claim 10, characterized in that the cell network structure further comprises a plurality of battery cells and a cooling tube attached to the plurality of battery cells, and wherein the cooling tube is provided to communicate with the port block. Petition 870250089876, dated 10 / 02 / 2025, p. 35 / 57 4 / 4 14. Battery pack according to claim 13, characterized in that the heat dissipation path is formed from the battery cell to the cooling tube, the port block and the assembly box, or from the battery cell to the assembly box, through the cooling tube, the port block and the lower casing.

15. Vehicle, characterized in that it comprises the battery pack, as defined in any one of claims 1 to 14. Petition 870250089876, dated 02 / 10 / 2025, pp. 36 / 57

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