Pack housing, battery pack, and vehicle including same

Abstract

Provided are a pack housing for a shared battery pack, and a battery pack and a vehicle, including the pack housing. A pack housing according to an aspect of the present invention includes: a bottom cover on which a battery module is placed; an outer frame formed on the outer side of the bottom cover; and a partition frame that divides an inner space formed by the bottom cover and the outer frame into a plurality of module spaces, wherein at least one of the outer frame and the partition frame has a variable structure having an adjustable width.

Description

Pack housing, battery pack and vehicle including same

[0001] The present invention relates to a pack housing, a battery pack including the same, and a vehicle including the battery pack. More particularly, the present invention relates to a pack housing that can be commonly applied to battery modules of various sizes, a battery pack, and a vehicle including the same. This application claims priority to Korean Patent Application No. 10-2024-0014100, filed on January 30, 2024, the entire contents of which are incorporated herein by reference.

[0002] As technological development and demand for various mobile devices, electric vehicles, and energy storage systems (ESS) increase significantly, interest in and demand for secondary batteries as an energy source are steadily increasing.

[0003] Compared to nickel-based secondary batteries, lithium secondary batteries are widely used as secondary batteries because they have almost no memory effect, can be charged and discharged freely, have a very low self-discharge rate, and have a high energy density. These lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive and negative active materials, respectively. Lithium secondary batteries have an electrode assembly in which positive and negative plates, each coated with positive and negative active materials, are arranged with a separator between them, and an outer case, i.e. a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0004] In general, secondary batteries can be classified into can-type batteries in which the electrode assembly is built into a metal can and pouch-type batteries in which the electrode assembly is built into a pouch of aluminum laminate sheet, depending on the shape of the outer packaging material.

[0005] The operating voltage of these unit secondary batteries, that is, unit battery cells, is approximately 2.5 V to 4.6 V. Therefore, when a higher output voltage is required, a battery pack is configured by connecting multiple battery cells in series. In addition, a battery pack is configured by connecting multiple battery cells in parallel depending on the charge / discharge capacity required for the battery pack. Therefore, the number of battery cells included in the battery pack can be set in various ways depending on the required output voltage or charge / discharge capacity. Meanwhile, when configuring a battery pack by connecting multiple battery cells in series / parallel, a battery module composed of at least one battery cell is first configured, and other components are added using this battery module, and this is housed in a pack housing to configure the battery pack.

[0006] Conventionally, the pack housing of a battery pack is determined by the battery module size. Even within the same vehicle OEM, the pack housing size and mounting location within the vehicle vary depending on the required energy.

[0007] Figure 1 is a drawing showing that the pack housing of a conventional battery pack is determined according to the battery module size.

[0008] For example, if a vehicle OEM wants to produce battery packs with energies of 50 kWh, 70 kWh, and 90 kWh, as shown in (a), (b), and (c) of FIG. 1, the conventional method results in the 50 kWh battery pack (40), the 70 kWh battery pack (20), and the 90 kWh battery pack (30) all having different pack housing sizes (W1, W2, W3) and vehicle mounting positions (P1, P2, P3) (W1≠W2≠W3, P1≠P2≠P3).

[0009] The battery pack (40) for 50 kWh, the battery pack (20) for 70 kWh, and the battery pack (30) for 90 kWh each contain battery modules (12, 22, 32) of different sizes within pack housings (14, 24, 34) of different sizes, but all have a center beam (C) and side beams (S) of the same shape.

[0010] This would require three different types of vehicle frames, not just battery packs, resulting in significant cost and time losses. If battery packs could be standardized so that they have the same pack housing size and vehicle mounting location regardless of energy consumption, both cost and time could be reduced.

[0011] The problem to be solved by the present invention is to provide a pack housing for a common battery pack.

[0012] Another problem that the present invention seeks to solve is to provide a common battery pack by including such a pack housing.

[0013] A pack housing according to one aspect of the present invention comprises: a bottom cover on which a battery module is placed; an outer frame formed on the outer side of the bottom cover; and a partition frame dividing an internal space formed by the bottom cover and the outer frame into a plurality of module spaces; wherein at least one of the outer frame and the partition frame has a variable structure capable of adjusting its width.

[0014] Preferably, the partition frame includes a center beam arranged in the front-back direction on the bottom cover, and the center beam has a variable structure whose width can be adjusted in the left-right direction.

[0015] In one embodiment of the present invention, the variable structure includes a main body, an extension, and a width adjusting member, wherein the extension is slidably fitted onto an outer circumferential surface of the main body by forming a receiving space corresponding to a cross-section of the main body, the extension expands the width by being withdrawn from the main body, and the width adjusting member adjusts the extended length of the extension while fixing the extension in a state where it is withdrawn from the main body.

[0016] At this time, the extension part may include a first extension part located on one side of the main body part and a second extension part located on the other side of the main body part.

[0017] In addition, the extension part may include a support part arranged to be in contact with a side surface of the main body part, and an upper extension part and a lower extension part formed to extend from both ends of the support part in the height direction to the upper and lower surfaces of the main body part, respectively.

[0018] Furthermore, the extension portion may include a front extension portion and a rear extension portion that extend from both longitudinal ends of the support portion to the front and rear of the main body portion, respectively.

[0019] At this time, the width adjustment member may include an expansion part fastening hole formed in the front extension part and the rear extension part in a long hole shape along the width direction of the expansion part to allow movement of the expansion part; a fastening protrusion formed in the main body part so as to be able to protrude from the expansion part fastening hole; and a fastening member fastened to the fastening protrusion through the expansion part fastening hole to fix the expansion part in a moved state.

[0020] In another embodiment of the present invention, the extension portion may have a slide hole formed therein along the width direction, or may include a slide groove that is closed on the outside and sunken inward.

[0021] In this case, the width adjustment member may include an expansion part fastening hole formed in a long hole shape along the width direction of the expansion part to allow movement of the expansion part; at least one main body fastening hole formed in the main body part and communicating with the expansion part fastening hole; and a fixing member fastened to the main body fastening hole through the expansion part fastening hole to fix the expansion part in a moved state.

[0022] In another embodiment of the present invention, the variable structure includes a main body, an extension, and a width adjustment member, wherein the main body has a slide hole formed therein along the width direction, the extension is installed so as to be able to slide in the slide hole, and the width adjustment member may be configured to adjust the extension length of the extension while fixing the extension in a state in which it is pulled out from the main body.

[0023] In the present invention, at least one of the outer frame and the partition frame may be a beam manufactured by extruding aluminum with a mixture of empty space and ribs inside.

[0024] In the present invention, a fluid-flowable flow path may be provided inside at least one of the outer frame and the partition frame.

[0025] At this time, at least one of the outer frame and the partition frame may have one or more communication holes formed to connect the module space and the duct.

[0026] Additionally, the above-mentioned euro may be formed as a multi-layer structure in which a plurality of unit euros are stacked in the height direction.

[0027] Here, the fluid may include gas generated during a thermal runaway situation of the battery module.

[0028] In the present invention, at least one of the outer frame and the partition frame is formed in the form of a hollow pipe structure and has a hollow interior, and at least one dividing wall is provided in the height direction to divide the hollow interior space into an upper space and a lower space, so that the hollow interior space can be divided into a plurality of sections in the height direction.

[0029] A battery pack according to another aspect of the present invention comprises: a pack housing of the present invention; and battery modules mounted in a plurality of module spaces.

[0030] Here, the battery module can be fixed to at least one of the outer frame and the partition frame.

[0031] In particular, the battery module includes a battery cell assembly and a module case for fixing the battery cell assembly, and the battery module has a fastening block that protrudes from the module case and is provided so that a bolt can be inserted in an up-and-down direction, and the battery module can be fixed to at least one of the outer frame and the partition frame by fastening the bolt to the fastening block.

[0032] The present invention also provides a vehicle including such a battery pack.

[0033] According to one aspect of the present invention, a battery pack is implemented that can be assembled to have the same pack housing size and vehicle mounting position regardless of the battery module size (width dimension).

[0034] According to one aspect of the present invention, battery packs of various energies can be manufactured with the same pack housing size and vehicle mounting position. The battery packs include a pack housing including an outer frame or partition frame having a variable structure.

[0035] The pack housing of the present invention particularly proposes a center beam technology with a variable structure. By adopting a variable structure for the center beam, it has the structural feature of being able to be assembled regardless of the battery module width (energy). According to the present invention, the center beam does not have a single structure, but rather changes shape variably depending on the battery module size. Therefore, a battery pack of the same size can be produced even when different battery module sizes are applied. According to the present invention, cost reduction is possible through securing the center beam technology with a variable structure.

[0036] According to one aspect of the present invention, customer requirements for commonization of battery packs can be satisfied. A common battery pack can be manufactured with the same pack housing size and vehicle mounting location, regardless of energy. In other words, the present invention allows for the production of a battery pack of the same size regardless of the battery module size applied. The commonized battery pack provided by the present invention saves costs and time. Furthermore, the vehicle frame does not need to be changed.

[0037] According to another aspect of the present invention, when gas is generated within a battery pack, it can be discharged to the outside while delaying / preventing the gas from affecting adjacent battery modules. Even without significantly altering the overall structure of the battery pack, the direction of venting gas generated within the battery pack can be effectively controlled and quickly discharged, preventing fire or slowing its spread.

[0038] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0039] Figure 1 is a drawing showing that the pack housing of a conventional battery pack is determined according to the battery module size.

[0040] FIG. 2 is a drawing showing that the pack housing of the battery pack according to the present invention can be commonly applied to battery modules of various sizes.

[0041] FIG. 3 is another drawing showing that the pack housing of the battery pack according to the present invention can be commonly applied to battery modules of various sizes.

[0042] Figure 4 is an exploded perspective view of a battery pack according to one embodiment of the present invention.

[0043] FIG. 5 is a top view of a pack housing included in the battery pack of FIG. 4.

[0044] Figure 6 is a perspective view showing some components of a battery pack to explain the variable structure of the center beam.

[0045] Figure 7 is an exploded perspective view of Figure 6.

[0046] Fig. 8 is a drawing explaining application of the center beam of Fig. 6 to battery modules of various sizes.

[0047] Figure 9 is a drawing for explaining another example of a variable structure center beam.

[0048] Figure 10 is a drawing illustrating another example of a variable structure center beam.

[0049] FIG. 11 is a drawing schematically showing the configuration of a vehicle according to one embodiment of the present invention.

[0050] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention, and various equivalents and modifications may exist as of the time of this application.

[0051] In the drawings, the sizes of each component or specific parts of that component are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Therefore, the sizes of each component do not entirely reflect the actual size. If a detailed description of a related known function or configuration is deemed to unnecessarily obscure the gist of the present invention, such description will be omitted.

[0052] FIG. 2 is a drawing showing that the pack housing of the battery pack according to the present invention can be commonly applied to battery modules of various sizes. FIG. 3 is another drawing showing that the pack housing of the battery pack according to the present invention can be commonly applied to battery modules of various sizes.

[0053] In the case of manufacturing a 50 kWh battery pack, a 70 kWh battery pack, and a 90 kWh battery pack as in the example referring to FIG. 1, referring to (a), (b), and (c) of FIGS. 2 and 3, the 50 kWh battery pack (10'), the 70 kWh battery pack (20'), and the 90 kWh battery pack (30') according to the present invention all have the same pack housing size (W) and vehicle mounting position (P). Therefore, the vehicle frame also does not need to be different.

[0054] Even if the battery pack (10') for 50 kWh, the battery pack (20') for 70 kWh, and the battery pack (30') for 90 kWh include battery modules (12, 22, 32) of different sizes, as in the example referring to FIG. 1, they can be manufactured using a pack housing (34') according to the present invention of the same size.

[0055] This is possible because at least one of the side beams and the center beam included in the pack housing (34') has a variable structure that allows for width adjustment.

[0056] Fig. 2 illustrates an example in which the pack housing (34') includes a center beam (C') of variable structure and a side beam (S) of non-variable structure, and Fig. 3 illustrates an example in which the pack housing (34') includes a side beam (S') of variable structure and a center beam (C) of non-variable structure. Of course, the pack housing (34') may also include a center beam (C') of variable structure and a side beam (S') of variable structure.

[0057] Looking more closely at the assembled state of each battery pack (10, 20', 30') using the pack housing (34'), among the 50kWh battery pack (10'), the 70kWh battery pack (20'), and the 90kWh battery pack (30') in FIG. 2, the size of the battery module (32) included in the 90kWh battery pack (30') is the largest, and the width of the center beam (C') included in the 90kWh battery pack (30') is set to L3 to accommodate the battery module (32). In the 70kWh battery pack (20') including a battery module (22) of a smaller size than the battery module (32), the width of the center beam (C') is expanded to L2, which is larger than L3, and assembled. In a 50 kWh battery pack (10') including a battery module (12) of a smaller size than the battery module (22), the width of the center beam (C') is expanded to L1, which is larger than L2, and assembled (L1>L2>L3).

[0058] Similarly, in the 90 kWh battery pack (30') including the largest battery module (32) in Fig. 3, the width of the side beam (S') is D3 and assembled, and in the 70 kWh battery pack (20') including a battery module (22) of a smaller size than the 90 kWh battery pack (30'), the width of the side beam (S') is expanded to D2, which is larger than D3, and assembled. In addition, in the 50 kWh battery pack (10') including a battery module (12) of a smaller size than the 70 kWh battery pack (20'), the width of the side beam (S') is expanded to D1, which is larger than D2, and assembled (D1>D2>D3).

[0059] In this way, according to the present invention, by adjusting the width of the side beam (S') or the center beam (C'), battery packs (10', 20', 30') of various energies can be manufactured with the same pack housing (34') regardless of the battery module size (width dimension). Since battery packs (10', 20', 30') of different energies can have the same pack housing size (W) and the same vehicle mounting position (P), they are common battery packs. In this way, according to the present invention, battery packs of various energies can be manufactured with the same pack housing size and vehicle mounting position.

[0060] The present invention has a structural feature that allows assembly regardless of the width (energy) of the battery module by adopting a variable structure with adjustable width for the center beam or side beam of the pack housing. According to the present invention, rather than having a single fixed structure, the center beam or side beam changes shape variably depending on the battery module size, thereby adjusting its width. Therefore, even when different battery module sizes are applied, a battery pack of the same size can be manufactured.

[0061] The present invention satisfies customer requirements for commonization of battery packs. The commonized battery pack provided by the present invention saves costs and time.

[0062] Hereinafter, various pack housings and battery packs including the same according to embodiments of the present invention will be described in detail. Since the pack housing according to embodiments of the present invention has a variable structure so that it can accommodate battery modules of various sizes, the variable structure will be described in detail.

[0063] FIG. 4 is an exploded perspective view of a battery pack according to one embodiment of the present invention, and FIG. 5 is a top view of a pack housing included in the battery pack of FIG. 4.

[0064] Referring to FIGS. 4 and 5, a battery pack (40) according to one embodiment of the present invention includes a pack housing (50) and a battery module (60) unique to the present invention.

[0065] First, the pack housing (50) is a container that securely stores the battery module (60) and can be installed at a predetermined location within the vehicle. The pack housing (50) can be largely composed of a bottom cover (100), an outer frame (200), and a partition frame (300).

[0066] The bottom cover (100) provides a space for placing the battery module (60), and can be configured in the form of a flat plate with a relatively large area. It can be positioned at the bottom of the battery module (60) to cover the bottom of each battery module (60).

[0067] The outer frame (200) and the partition frame (300) are vertically connected to the bottom cover (100) and can also be connected to each other. The outer frame (200) and the partition frame (300) may each be an aluminum extrusion structure and may be welded and / or bolted to form the pack housing (50). For example, by manufacturing the outer frame (200) and the partition frame (300) by extruding aluminum with a mixture of empty spaces and ribs inside and welding them to form the pack housing (50), the weight of the pack housing (50) can be reduced and the mechanical rigidity can be maintained above a reliable level. In addition, the empty space serves to reduce the weight of the frames (200, 300) and at the same time acts as a passage for releasing accumulated heat. That is, the heat of the pack housing (50) is discharged through the empty space, thereby lowering the temperature of the pack housing (50), and as the temperature of the pack housing (50) is lowered, the heat generated in the battery module (60) can be smoothly absorbed.

[0068] The outer frame (200) is formed at a predetermined height on the outer side of the bottom cover (100), and the outer frame (200) may have a roughly beam shape with an empty interior. For example, the outer frame (200) may be formed of a pair of side beams (210) arranged on both sides in the left and right directions (X direction in FIGS. 4 and 5) on the bottom cover (100), and a front beam (220) and a rear beam (230) arranged on both sides in the front-back direction (Y direction in FIGS. 4 and 5), and these may be arranged on the side, front, and rear of the bottom cover (100) to cover the side of the battery module (60). The side beams (210), the front beams (220), and the rear beams (230) may be assembled from separate parts or may be integral parts that are connected to each other. The assembly may be performed by various methods such as fitting, bolting, bonding, and welding. The outer frame (200) is vertically joined along the edge of the bottom cover (100) to form a wall. In the pack housing (50), the front beam (220) can form a front wall, the rear beam (230) can form a rear wall, and the side beam (210) can form a left side wall and a right side wall, respectively.

[0069] The partition frame (300) divides the internal space formed by the bottom cover (100) and the outer frame (200), that is, the internal space defined in a box shape by the bottom cover (100) and the outer frame (200), into a plurality of sections. The partition frame (300) may also have a roughly beam shape with an empty interior. The partition frame (300) may be formed by arranging one or more center beams (310) and cross beams (390) in a grid shape. The center beam (310) may refer to a partition frame arranged in the front-rear direction on the bottom cover (100), and the cross beam (390) may refer to a partition frame arranged in the left-right direction on the bottom cover (100). The center beam (310) may be coupled at both ends to the front beam (220) and the rear beam (230). The cross beam (390) may be coupled at both ends to the left and right side beams (210).

[0070] The number of center beams (310) and cross beams (390) included in the pack housing (50) may vary from those illustrated in FIGS. 4 and 5. The number of center beams (310) and cross beams (390) may be at least one, and may be multiple in order to accommodate multiple battery modules (60). In this way, the internal space of the pack housing (50) may be divided into multiple zones by the partition frame (300), i.e., the center beam (310) and the cross beam (390), and battery modules (60) may be individually installed in each of the corresponding zones. In this case, each of the corresponding zones may be defined as a module space (M) in the present invention. The battery modules (60) may be individually installed in each of the multiple module spaces (M). The battery modules (60) can be arranged neatly within the pack housing (50) in a nearly rectangular shape, and each battery module (60) can be connected to secure the power required for driving the vehicle. Of course, it may also be possible to have only the cross beam (390) without the center beam (310), or only the center beam (310) without the cross beam (390).

[0071] At this time, in the pack housing (50), at least one of the outer frame (200) and the partition frame (300) is characterized by having a variable structure capable of adjusting the width.

[0072] As described above, the pack housing of a conventional battery pack is determined according to the battery module size. Conventionally, battery packs are manufactured with different pack housing sizes and vehicle mounting positions depending on the battery module size. At this time, they all have a center beam and a side beam having the same shape. The present invention provides a pack housing (50) in which the outer frame (200) or the partition frame (300) constituting the pack housing (50) is provided with a variable structure capable of adjusting the width thereof, so that even if the pack housing size remains unchanged, the width of the outer frame (200) or the partition frame (300) can be changed to suit the size of the battery module accommodated therein, thereby providing a pack housing (50) in which battery modules of various sizes can be suitably accommodated, and at least one of the outer frame (200) and the partition frame (300) is configured with a variable structure capable of adjusting the width thereof.

[0073] Preferably, the outer frame (200) is only adjustable in width on one side toward the battery module (60) so as not to change the apparent size of the pack housing (50). The partition frame (300) can be adjusted in width on both sides toward the battery module (60).

[0074] As illustrated in FIGS. 4 and 5 as examples, in a battery pack (40) including battery modules (60) in a 2×2 arrangement, the side beams (210) on both sides can have a variable structure, the center beam (310) can have a variable structure, the cross beam (390) can have a variable structure, or the front beam (220) and the rear beam (230) can have variable structures. If only the length of the battery module (60) in the width direction (X direction in FIGS. 4 and 5) changes, it is convenient to be able to respond to changes in the size of the battery module (60) by making only the center beam (310) a variable structure.

[0075] Next, the battery module (60) may include a battery cell assembly (not shown) and a module case (62) for fixing the battery cell assembly.

[0076] The battery cell assembly may be formed by stacking or integrating a plurality of battery cells (not shown). For example, a pouch-shaped battery may be employed as the battery cell, and the pouch-shaped battery may be configured to be vertically aligned with its wide surface and stacked in one direction to form a battery cell assembly. However, other forms of secondary batteries, such as cylindrical or square can-shaped batteries, may also be employed as battery cells included in the battery module (60). For example, when a cylindrical battery is employed, the cylindrical cells may be vertically aligned and densely arranged in a number of rows and columns, and may be manufactured into a single battery cell assembly using a frame or potting resin capable of maintaining such dense arrangement. For example, the battery cell may be a 4680-shaped battery cell. Here, 4680 represents a form factor. The first two numbers in the form factor represent the diameter of the secondary battery, and the remaining numbers represent the height of the secondary battery. The 4680 cell has higher efficiency and larger size than the existing 18650 or 21700 cells.

[0077] The module case (62) accommodates the battery cell assembly within it. The module case (62) may be configured in the shape of a rectangular parallelepiped box that surrounds the periphery of the battery cell assembly so that the battery cell assembly can be held within it. In order to sufficiently protect the battery cell assembly from the swelling phenomenon of the pouch-type battery and external impact, the module case (62) may be preferably manufactured from a metal material with high mechanical rigidity. In the case of using a can-type battery, the module case (62) may be manufactured from a plastic material to reduce the weight.

[0078] Preferably, the outer frame (200) and the partition frame (300) of the pack housing (50) can be used as a place for fixing the battery module (60). The battery module (60) can be fastened to the outer frame (200) and the partition frame (300) with a bolt (B). For example, the battery module (60) can be provided with a fastening block (64) that protrudes from the module case (62) and is provided so that the bolt (B) can be inserted in the vertical direction. The fastening block (64) can be provided at a height that can be placed on the upper surface of the outer frame (200) or the partition frame (300) of the battery module (60). The battery module (60) can be fixed to the pack housing (50) by fastening the bolt (B) to the fastening block (64) placed on the outer frame (200) or the partition frame (300). In the illustrated example, the battery module (60) is fixed to the side beam (210) and the center beam (310), and holes for fastening bolts (B) may be formed in the side beam (210) and the center beam (310) as illustrated.

[0079] In addition, the battery pack (40) may further include an electrical component assembly (not shown) and a top cover (400). The electrical component assembly may include a relay device, a current sensor, a fuse, a BMS (Battery Management System), an MSD (Manual Service Disconnector), etc. The relay device is a switching component that selectively opens and closes a charging and discharging path through which current flows, and may block the flow of charging and discharging current when an abnormality occurs in the battery pack (40). The BMS refers to a battery management device that controls the overall charging and discharging operation of the battery module (60), and may be a component typically included in the battery pack (40). The BMS estimates the state of the battery cells in the battery pack (40) and manages the battery pack (40) using the estimated state information. For example, it estimates and manages battery pack (40) state information such as SOC (State Of Charge), SOH (State Of Health), maximum input / output power allowance, and output voltage of the battery pack (40). And, using this status information, the charging or discharging of the battery pack (40) can be controlled, and further, the replacement time of the battery pack (40) can be estimated. The BMS manages and monitors the status of the battery cell, such as voltage, current, and temperature, and maintains the battery pack (40) in an optimal state based on this. That is, the BMS efficiently manages the battery pack (40) of the electric vehicle to enable stable driving of the electric vehicle, predicts the replacement time of the battery pack (40), and can control the battery pack (40) to prevent car accidents by detecting abnormalities in advance. And the MSD is a system for selectively cutting off the power of the high-voltage battery by a physical method, and is a component that cuts off the power by disconnecting the service plug when necessary. This electrical equipment assembly can be packaged together with the battery module (60) by the pack housing (50) and the top cover (400) so as not to be exposed to the outside.A sealing member (not shown) such as a gasket may be provided between the pack housing (50) and the top cover (400) to enable sealing. For example, the sealing member may be a band shape that follows the shape of the edge of the pack housing (50). The sealing member may be made of a material that exhibits a predetermined elasticity so that the desired sealing force can be stably exerted by the pressure applied when the pack housing (50) and the top cover (400) are coupled, and may be compressed or deformed in the vertical direction by the pressure. The sealing member may be made of a rubber material, for example, an EPDM material.

[0080] The battery pack (40) may have an approximately rectangular parallelepiped appearance due to the combination of the pack housing (50) and the top cover (400). When the battery pack (40) is mounted on an electric vehicle such as an EV or HEV, the mounting space is limited due to the vehicle components arranged at a high degree of integration. Therefore, it is preferable that the battery pack (40) be formed into a rectangular parallelepiped structure so that it can be mounted in a narrow space such as between the driver's seat and the passenger seat.

[0081] In the illustrated example, the top cover (400) is roughly expressed as a plate shape, but the top cover (400) may also have a flat box lid shape with an inner receiving space and an open bottom. The top cover (400) may be made of an insulating resin for electrical insulation. For example, the top cover (400) may be manufactured as a plastic injection molded product. Such a top cover (400) has the advantage of ensuring insulation from the battery module (60), and also provides convenience in processing and reduces manufacturing costs.

[0082] The pack housing (50) provides a space for storing the battery module (60) and the electrical component assembly inside, and may further include a bracket or mounting structure (not shown) so that it can be coupled to the vehicle body or frame. The pack housing (50) provides mechanical support to the battery module (60) and the electrical component assembly and protects them from external impacts, etc., and therefore is preferably manufactured from a metal material with high rigidity. When the pack housing (50) is made of a metal material, an insulating sheet (not shown) may be further included on the bottom cover (100) to provide insulation. For example, the insulating sheet may be a polycarbonate sheet. As another example, an insulating coating layer may be included on the upper surface of the bottom cover (100). The insulating coating layer may be formed by coating, applying, or attaching an insulating material of any one of silicone resin, polyamide, and rubber. With this insulating coating layer configuration, the insulating coating effect can be maximized with a minimum amount of coating. In addition, since an insulating coating layer is applied to the surface of the bottom cover (100), the insulation between the battery module (60) and the bottom cover (100) can be strengthened. As another example, the pack housing (50) may be manufactured with at least some of its components made of plastic injection molding. For example, it may be formed of a plastic material (e.g., polycarbonate, etc.) that has both insulating and flame retardant properties.

[0083] Preferably, a fluid-flowable flow path is provided within at least one of the outer frame (200) and the partition frame (300). The detailed structure of the flow path will be discussed in more detail in the description section referring to FIGS. 6 to 8 below, and the advantages of providing the flow path will be primarily described herein.

[0084] The battery module (60) may experience a thermal runaway situation in which the battery cell ignites due to overcharge, etc., and at this time, high-temperature and high-pressure gas, flames, and metal particles may be generated in the trigger cell in which the battery cell ignites or the trigger module, which is a battery module including the trigger cell. The present invention proposes a configuration in which a path through which gas (venting gas) or flames generated in this thermal runaway situation can flow is provided within the outer frame (200) or partition frame (300) constituting the pack housing (50), so that the gas or flames can be guided through the path and discharged to the outside. A venting device (not shown) may be further included in the portion connecting the path and the outside to enable effective discharge.

[0085] Each module space (M) may be formed in a structure in which the sides are surrounded by a partition frame (300), or in a structure in which the sides are surrounded by an outer frame (200) and a partition frame (300). In this case, at least one of the frames (200, 300) surrounding each module space (M) may have one or more communication holes (203) formed on one side to communicate with each module space (M) through a flow path. The position of the communication hole (203) may be configured in various ways, different from that shown, as needed. When an issue occurs in a battery module (60) installed in each module space (M), gas or flame generated may flow into the flow path formed inside the frames (200, 300) through the communication holes (203).

[0086] At this time, each module space (M) is configured as a closed space by a bottom cover (100), frames (200, 300) surrounding the side of each module space (M), and a top cover (400), so that each module space can be spatially separated from other module spaces.

[0087] Accordingly, according to the present invention, when an issue occurs in a specific battery module installed in a module space, gas or flames generated in the trigger module can be discharged to the outside through a conduit provided inside the frames through a communication hole provided in the module space without invading other module spaces, thereby blocking heat transfer to other normal modules and minimizing adverse effects on normal modules.

[0088] In this way, when gas is generated within the battery pack (40), it can be discharged to the outside while delaying / preventing the gas from affecting adjacent battery modules. Even without significantly changing the overall structure of the battery pack (40), the direction of discharge of venting gas generated within the battery pack (40) can be effectively controlled and quickly discharged, thereby preventing fire or delaying the spread of fire.

[0089] The outer frame (200) or partition frame (300) is a variable structure capable of adjusting its width. In particular, as mentioned above, if the center beam (310) is a variable structure capable of adjusting its width in the left and right directions, it is preferable because it can easily and simply accommodate battery modules of various sizes compared to when each of the pair of side beams (210) is a variable structure.

[0090] FIG. 6 is a perspective view showing some components of a battery pack to explain the variable structure of the center beam, and FIG. 7 is an exploded perspective view of FIG. 6.

[0091] Referring to FIGS. 6 and 7, the center beam (310) is a variable structure with adjustable width and includes a main body (320), an extension (330), and a width adjustment member (340).

[0092] The main body (320) is a part that forms the basis of the center beam (310). The extension part (330) is slidably fitted onto the outer surface of the main body (320) by forming a receiving space corresponding to the cross-section of the main body (320). The extension part (330) is extended from the main body (320) to expand its width. The width adjusting member (340) adjusts the extended length of the extension part (330) while fixing the extension part (330) in a state in which it is extended from the main body (320).

[0093] The expansion part (330) may include a first expansion part (330) located on one side of the main body part (320) and a second expansion part (330) located on the other side of the main body part (320). The first expansion part (330) and the second expansion part (330) are the same component. That is, the expansion parts (330) may be provided as a pair. This is to form a symmetrical structure considering that the center beam (310) is placed in the middle and the battery modules (60) are accommodated on both sides. However, it is also possible to provide the expansion part (330) on only one side of the main body part (320).

[0094] Looking at the configuration of the extension part (330) in detail, the extension part (330) may include a support part (331) arranged to be in contact with the side surface of the main body part (320), and an upper extension part (332) and a lower extension part (333) formed to extend from the upper and lower surfaces of the main body part (320) at both ends in the height direction of the support part (331), respectively. The support part (331), the upper extension part (332), and the lower extension part (333) may be connected to each other. The extension part (330) may be formed by cutting a single metal plate into a set shape and then bending both ends.

[0095] In addition, the extension (330) may include a front extension (334) and a rear extension (335) that extend from both ends of the support (331) in the longitudinal direction (Y direction of FIGS. 6 and 7) to the front and rear of the main body (320), respectively. By including the front extension (334) and the rear extension (335), the extension (330) is restricted from moving in the front-back direction of the main body (320) and can only move in the left-right direction, which is advantageous when adjusting the width.

[0096] The support portion (331), the upper extension portion (332), the lower extension portion (333), the front extension portion (334), and the rear extension portion (335) may be connected to each other to form a roughly rectangular parallelepiped box shape with one side facing the main body portion (320) open. For example, the extension portion (330) may be viewed as a structure including five plates in the shape of a rectangular parallelepiped with one side missing. The extension portion (330) of this structure may be viewed as including a slide groove that is closed on the outside and sunken on the inside. In addition, the support portion (331) may be extended in the length direction, and the extension portion (330) may have a cross-section (XZ cross-section) in the width direction that is in the shape of the letter 'ㄷ'. In a state where the main body (320) is fixed to the bottom cover (see 100 in FIG. 4) by welding or the like, the extension part (330) can slide left and right along the width direction, i.e., between a position in close contact with the main body (320) and a position spaced apart from the main body (320), at one end of the main body (320).

[0097] At this time, the width adjustment member (340) is formed in a long hole shape along the width direction of the expansion portion (330) to allow movement of the expansion portion (330), and includes an expansion portion fastening hole (336) formed in the front extension portion (334) and the rear extension portion (335). The expansion portion fastening hole (336) is a variable fastening hole.

[0098] In addition, the width adjustment member (340) includes a fastening projection (323) formed on the main body (320) so as to be protruded from the expansion portion fastening hole (336), and a fastening member (324) fastened to the fastening projection (323) through the expansion portion fastening hole (336) to fix the expansion portion (330) in a moved state. For example, the fastening projection (323) may have a screw thread formed thereon, and the fastening member (324) may be a nut.

[0099] The main body (320) is fitted into the expansion portion (330) so that the fastening projection (323) can protrude from the expansion portion fastening hole (336). When the fastening projection (323) is located at the outer end of the expansion portion fastening hole (336), the width of the center beam (310) is the largest, and when the fastening projection (323) is located at the inner end of the expansion portion fastening hole (336), the width of the center beam (310) is the smallest.

[0100] The fastening protrusion (323) may be provided to protrude elastically, for example, like a spring pin. In this case, when the fastening protrusion (323) is pressed and the expansion portion (330) is pushed into the main body (320), and then the force pressing the fastening protrusion (323) is removed, the fastening protrusion (323) can be elastically protruded from the expansion portion fastening hole (336). In this way, the connection between the main body (320) and the expansion portion (330) can be easily achieved without a large force, and once connected, the expansion portion (330) is stable because it does not fall off from the main body (320). Even if it is necessary to detach the extension part (330) from the main body part (320), if the worker momentarily applies force in the width direction while the fastening projection (323) is protruding from the extension part fastening hole (336), the extension part (330) slides and the elastically protruding fastening projection (323) retreats and is detached from the extension part fastening hole (336), allowing the extension part (330) and the main body part (320) to be easily separated.

[0101] Until the installation location of the expansion portion (330) is confirmed, the location of the fastening projection (323) within the expansion portion fastening hole (336) can be adjusted. Although the fastening projection (323) remains in place, the presence of the expansion portion fastening hole (336) allows the left and right movement of the main body portion (320), thereby allowing the location of the support portion (331) of the main body portion (320) to be adjusted from the end of the expansion portion (330). When the installation location is confirmed, the fastening member (324) can be fastened to the fastening projection (323) to prevent further movement.

[0102] Referring to FIGS. 4 to 7 together, a method for assembling a battery module (60) into a pack housing (50) including a center beam (310) of FIG. 6 can be performed as follows. First, a pack housing (50) is prepared in which frames (200, 300) are joined to a bottom cover (100) by welding or the like. At this time, even if the main body (320) of the center beam (310) is fixed to the bottom cover (100) by welding, the extension (330) must be in a state where it can slide. Then, the battery module (60) is placed on the bottom cover (100). At this time, a fastening block (64) provided on one side of the battery module (60) can be lowered so as to be positioned on the side beam (210). Then, the extension (330) of the center beam (310) is moved so that the fastening block (64) provided on the other side of the battery module (60) is positioned on the center beam (310). The fastening projection (323) protrudes from the extension fastening hole (336), and since the extension fastening hole (336) has a long hole shape, when the extension (330) is moved left and right in the width direction, the relative position of the fastening projection (323) within the extension fastening hole (336) is changed, and the extension (330) can be moved to a desired position while sliding freely without resistance. Then, the fastening member (324) is fastened to the fastening projection (323) to fix the position of the extension (330). Then, the bolt (B) is fastened to the fastening block (64) to fix the battery module (60) to the pack housing (50). According to this method, a common battery pack (40) can be implemented without a particularly complicated assembly and manufacturing process, without any defects or increased costs.

[0103] Fig. 8 is a drawing explaining application of the center beam of Fig. 6 to battery modules of various sizes.

[0104] For example, even if the battery pack (40a) shown in (a) of FIG. 8 includes a battery module (60a) of size A, and the battery pack (40b) shown in (b) of FIG. 8 includes a battery module (60b) of size A' larger than A, both battery packs (40a, 40b) can have the same pack housing size (W) (A <A').

[0105] In the battery pack (40b) including a relatively large battery module (60b), the center beam (310) is assembled with a width of L'. In the battery pack (40a) including a small battery module (60a), the center beam (310) is assembled with a width L that is larger than L' (L>L'). In the battery pack (40b), the fastening protrusion (323) is positioned closer to the outer end of the expansion fastening hole (336), whereas in the battery pack (40a), the fastening protrusion (323) is positioned closer to the inner end of the expansion fastening hole (336).

[0106] When the width of the side beam (210) is C, the pack housing size (W) of the battery pack (40a) is 2×C+2×A+L, and the pack housing size (W) of the battery pack (40b) is 2×C+2×A'+L', which are the same.

[0107] In this way, according to an embodiment of the present invention, a pack housing (50) that can be easily applied to battery modules of various sizes can be provided, particularly by adjusting the size (width) of the center beam (310).

[0108] Meanwhile, as mentioned above, a fluid-flowable flow path is provided within at least one of the outer frame (200) and the partition frame (300). Referring to FIGS. 6 to 8, flow paths (211, 212) are provided in the side beam (210), and flow paths (321, 322) are provided in the center beam (310), particularly in the main body (320). When flow paths are provided in the outer frame (200) or the partition frame (300), these flow paths may be connected to each other.

[0109] At least one of the two ends of each of the passages (211, 212, 321, 322) may be configured to be in communication with the outside. Gas or flames, etc. flowing into each of the passages (211, 212, 321, 322) through the communication hole (see 203 in Fig. 4) may be configured to be discharged to the outside.

[0110] In particular, in the present embodiment, the main body (320) of the side beam (210) and the center beam (310) is formed in the shape of a hollow pipe structure so that the interior is hollow, and at least one dividing wall is provided in the height direction to divide the hollow interior space into an upper space and a lower space, so that the hollow interior space is divided into a plurality of sections in the height direction, so that a multi-layer structure is formed in which flow paths (211, 212) are stacked in the height direction and flow paths (321, 322) are stacked in the height direction. The flow paths (211, 321) of the lower space are connected to each other, and communication holes (203) can be arranged to correspond to some battery modules (60). Similarly, the flow paths (212, 322) of the upper space are connected to each other, and other communication holes (203) can be arranged to correspond to other battery modules (60). In this way, the gas generated in the event of thermal runaway of some battery modules can be discharged to the outside along an independent discharge path through the lower space paths (211, 321) or the upper space paths (212, 322) without affecting other battery modules.

[0111] Meanwhile, as a modified example, the center beam (310) may include a main body (320a), an extension portion (330a), and a width adjustment member (340a) as illustrated in Fig. 9. Fig. 9 is a drawing for explaining another example of a variable structure center beam.

[0112] Referring to Fig. 9, the expansion portion (330a) is slidably fitted onto the outer surface of the main body portion (320a) by forming a receiving space corresponding to the cross-section of the main body portion (320a). The expansion portion (330a) is extended from the main body portion (320a) to expand its width. The width adjusting member (340a) adjusts the extended length of the expansion portion (330a) while fixing the expansion portion (330a) in a state in which it is extended from the main body portion (320a).

[0113] The expansion portion (330a) may include a first expansion portion (330a) located on one side of the main body portion (320a) and a second expansion portion (330a) located on the other side of the main body portion (320a). The first expansion portion (330a) and the second expansion portion (330a) are the same component. That is, the expansion portions (330a) may be provided as a pair. The expansion portion (330a) may, of course, be provided on only one side of the main body portion (320a).

[0114] The extension (340a) is a component that enables the width expansion of the center beam (310), and has a slide hole (337) formed therein along the width direction. This extension (340a) can expand the width of the center beam (310) by being pulled out in one direction from the main body (320a).

[0115] Accordingly, since the center beam (310) can be expanded in width by the extension portion (340a), it can be applied to battery modules of various sizes by adjusting the width to an appropriate width corresponding to a change in the size of the battery module.

[0116] Here, the width adjustment member (340a) may be configured to include an expansion joint (336a), a main body joint (325), and a fixing member (326).

[0117] The expansion joint (336a) is formed in a long hole shape along the width direction of the expansion joint (330a) to allow movement of the expansion joint (330a). The expansion joint (336a) is a variable joint hole.

[0118] Here, the extension (330a) can expand the width of the center beam (310) while moving within a range corresponding to the length of the extension fastening hole (336a).

[0119] The main body fastening hole (325) is a component that provides a fastening portion of the fixed member (326) while communicating with the expansion part fastening hole (336a), and can be configured to be formed as at least one and communicate with the expansion part fastening hole (336a). The main body fastening hole (325) is a fixed fastening hole. The fixed member (326) is a component that fixes the expanded member (330a) in a state where it is moved from the main body (320a), for example, in a pulled-out state, thereby fixing it in a width-adjusted state. A plurality of main body fastening holes (325) can be installed so as to be spaced apart from each other along the width direction of the main body (320a).

[0120] The fixed member (326) is fixed to the main body fastening hole (325) through the expansion fastening hole (336a), thereby allowing the expansion part (330a) to be moved to adjust the width of the center beam (310) to a desired degree, thereby fixing the expansion part (330a) to the main body (320a). The fixed member (326) can be inserted into and fixed to a main body fastening hole (325) selected from among a plurality of main body fastening holes (325). The fixed member (326) can be a fixed pin or a fixed bolt.

[0121] In this way, the expansion portion (330a) and the main body portion (320a) can be fixed via a fixing member (326) that is fixed to the expansion portion fastening hole (336a) and the main body fastening hole (325).

[0122] On the other hand, the center beam (310) may be configured to include a main body (320b), an extension portion (330b), and a width adjustment member (340b) as illustrated in Fig. 10. Fig. 10 is a drawing for explaining another example of a variable structure center beam.

[0123] The main body (320b) has a slide hole (327) formed therein along the width direction. The expansion portion (330b) is coupled with the main body (320b) to enable the width expansion of the center beam (310). The expansion portions (330b) may be provided as a pair, with one positioned on one side of the main body (320b) and the other positioned on the other side of the main body (320b) facing each other.

[0124] The extension part (330b) is a component that enables the width expansion of the center beam (310) and is arranged to be able to slide within the slide hole (327). The extension part (330b) can be slidably fitted onto the inner circumferential surface of the main body part (320b).

[0125] As the extension (330b) slides, the width of the center beam (310) may change. The outer surface of the extension (330b) and the inner surface of the main body (320b) are in surface contact. Although not shown in the drawing, a rail and a rail groove may be formed between the extension (330b) and the main body (320b). The extension (330b) can slide straightly in the width direction without shaking by the rail inserted into the rail groove. At least a portion of the extension (330b) is exposed to the outside of the main body (10).

[0126] The width adjustment member (340b) is a component that adjusts the extension length of the extension portion (330b) while fixing the extension portion (330b) in a state in which it is extended from the main body.

[0127] This width adjustment member (340b) may be configured to include a main body fastening hole (325b), a fastening projection (338), and a fastening member (339).

[0128] The main body fastening hole (325b) is formed in a long hole shape along the width direction of the main body (320b) to allow movement of the expansion part (330b). The fastening projection (338) is formed on the expansion part (330b) so as to protrude from the main body fastening hole (325b). The fastening member (339) can be fastened to the fastening projection (338) through the main body fastening hole (325b) to fix the expansion part (330b) in a moved state.

[0129] The extension part (330b) can slide inside the main body part (320b) through the slide hole (327), that is, through the open side of the main body part (320b), and is fixed by the width adjusting member (340b), thereby adjusting the width of the center beam (310) including it, so that it can be easily applied to battery modules of various sizes.

[0130] The battery pack (40) according to an embodiment of the present invention can be applied to various devices. Representative examples of such devices include means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, but the present invention is not limited thereto. The battery pack (40) is suitable for use as a battery pack for electric vehicles. In addition, it can also be used as an energy source for an Energy Storage System (ESS). An ESS refers to a standalone system that stores power of several hundred kWH or more. An ESS is a core component of the renewable energy industry. Since renewable energy sources such as solar and wind power cannot produce power at a desired time, it is important to store the power and use it when needed. The battery pack (40) according to an embodiment of the present invention can have an energy density and capacity suitable for use as an energy source for such an ESS.

[0131] FIG. 11 is a drawing schematically showing the configuration of a vehicle according to one embodiment of the present invention.

[0132] Referring to FIG. 11, a vehicle (V) according to one embodiment of the present invention may include a battery pack (40) according to one embodiment of the present invention described above. Here, the vehicle (V) may include, for example, a certain vehicle that uses electricity as a driving source, such as an electric vehicle or a hybrid vehicle. In addition to the battery pack (40) according to the present invention, the vehicle (V) may further include various other components included in the vehicle, such as a body or a motor.

[0133] The battery pack (40) can be installed at a predetermined location within the vehicle (V). The battery pack (40) can be used as an electric energy source to provide driving force to the motor of the electric vehicle and drive the vehicle (V).

[0134] The battery pack (40) can be charged or discharged by an inverter depending on the operation of the motor and / or internal combustion engine. The battery pack (40) can be charged by a regenerative charging device combined with a brake. The battery pack (40) can be electrically connected to the motor of the vehicle (V) via an inverter.

[0135] In this way, the battery pack (40) equipped in the vehicle (V) can provide the electric energy required for various operations of the vehicle (V). In addition, since the battery pack (40) has the various effects mentioned above, the vehicle (V) including it can also have such effects. The battery pack (40) can be manufactured to have various energies, but can have the same pack housing size and vehicle mounting position even if the energies are different. Therefore, there is no need to change the vehicle frame of the vehicle (V).

[0136] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back 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.

[0137] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0138] [Explanation of symbols]

[0139] 40, 40a, 40b: Battery pack 50: Pack housing

[0140] 60, 60a, 60b: Battery module 62: Module case

[0141] 64: Fastening block 100: Bottom cover

[0142] 200: Outer frame 203: Flue hole

[0143] 210: Side beam 220: Front beam

[0144] 230: Rear beam 211, 212, 321, 322: Euro

[0145] 300: Partition frame 310: Center beam

[0146] 320, 320a, 320b: Main body 323, 338: Fastening projection

[0147] 324, 339: Fastening member 325, 325b: Body fastening hole

[0148] 326: Fixed member 327, 337: Slide hole

[0149] 330, 330a, 330b: Extension 331: Support

[0150] 332: Upper extension 333: Lower extension

[0151] 334: Front extension 335: Rear extension

[0152] 336, 336a: Extension joint 340, 340a, 340b: Width adjustment member

[0153] 390: Crossbeam 400: Top cover

[0154] B: Bolt M: Module Space

[0155] V: Car

Claims

1. Bottom cover where the battery module is placed; An outer frame formed on the outer side of the above bottom cover; and A partition frame that divides the internal space formed by the bottom cover and the outer frame into a plurality of module spaces; Including, A pack housing characterized in that at least one of the outer frame and the partition frame has a variable structure capable of adjusting the width.

2. A pack housing characterized in that, in the first paragraph, the partition frame includes a center beam arranged in the front-back direction on the bottom cover, and the center beam has a variable structure whose width can be adjusted in the left-right direction.

3. In paragraph 1, the variable structure includes a main body, an extension part, and a width adjustment member, The above extension part is slidably fitted onto the outer surface of the main body part by forming a receiving space corresponding to the cross-section of the main body part, The above extension part expands the width by being withdrawn from the main body part, A pack housing characterized in that the above width adjustment member adjusts the extension length of the extension portion while fixing the extension portion in a state in which it is withdrawn from the main body portion.

4. In paragraph 3, A pack housing characterized in that the expansion part includes a first expansion part located on one side of the main body part and a second expansion part located on the other side of the main body part.

5. In paragraph 3, A pack housing characterized in that the extension part includes a support part arranged to be in contact with a side surface of the main body part, and an upper extension part and a lower extension part formed to extend from both ends of the support part in the height direction to the upper and lower surfaces of the main body part, respectively.

6. In paragraph 5, A pack housing characterized in that the extension portion includes a front extension portion and a rear extension portion that extend from the longitudinal ends of the support portion to the front and rear of the main body portion, respectively.

7. In paragraph 6, The above width control member is, An expansion fastening hole formed in the front extension and the rear extension in a long hole shape along the width direction of the expansion portion to allow movement of the expansion portion; A fastening projection formed on the main body so as to protrude from the above-mentioned expansion joint; and A pack housing characterized by including a fastening member that is fastened to the fastening projection through the expansion fastening hole and fixes the expansion fastening member in a moved state.

8. A pack housing according to claim 3, characterized in that the expansion portion has a slide hole formed therein along the width direction or includes a slide groove that is closed on the outside and sunken inward.

9. In paragraph 8, the width control member, An expansion joint formed in a long hole shape along the width direction of the expansion joint to allow movement of the expansion joint; At least one main body fastening hole formed in the main body and connected to the expansion fastening hole; and A pack housing characterized by including a fixing member that is fixed to the main body fixing hole through the expansion part fixing hole and fixes the expansion part in a moved state.

10. In paragraph 1, The above variable structure includes a main body, an extension part, and a width adjustment member, The above main body has a slide hole formed along the width direction inside, The above extension part is installed so as to be able to slide in the above slide hole, A pack housing characterized in that the above width adjustment member adjusts the extension length of the extension portion while fixing the extension portion in a state in which it is withdrawn from the main body portion.

11. A pack housing according to claim 1, characterized in that at least one of the outer frame and the partition frame is a beam manufactured by extruding aluminum with a mixed interior space and ribs.

12. A pack housing characterized in that, in the first paragraph, a fluid-flowable flow path is provided inside at least one of the outer frame and the partition frame.

13. A pack housing characterized in that, in the 12th paragraph, at least one of the outer frame and the partition frame has at least one communication hole formed to connect the module space and the flow path.

14. A pack housing characterized in that, in the 12th paragraph, the euro is formed of a multi-layer structure in which a plurality of unit euros are stacked in the height direction.

15. A pack housing according to claim 12, wherein the fluid includes gas generated in a thermal runaway situation of the battery module.

16. In the first paragraph, at least one of the outer frame and the partition frame is formed in the form of a hollow pipe structure and has a hollow interior, and at least one dividing wall is provided in the height direction to divide the hollow interior space into an upper space and a lower space, so that the hollow interior space is divided into a plurality of sections in the height direction. A pack housing characterized in that.

17. A pack housing as described in any one of paragraphs 1 to 16; and A battery pack comprising battery modules that are mounted in multiple module spaces.

18. A battery pack according to claim 17, characterized in that the battery module is fixed to at least one of the outer frame and the partition frame.

19. In paragraph 17, The above battery module includes a battery cell assembly and a module case for fixing the battery cell assembly, The above battery module has a fastening block that protrudes from the module case and is provided so that bolts can be inserted in an up-down direction, A battery pack characterized in that the bolt is fastened to the fastening block, thereby being fixed to at least one of the outer frame and the partition frame.

20. A vehicle comprising a battery pack according to Article 17.

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