Pack housing

Abstract

Exemplary embodiments provide a pack housing. The pack housing includes: multiple plates coupled to each other; and sidewalls coupled to the multiple plates. Each of the sidewalls includes: a plate portion coupled to the multiple plates; a sidewall portion perpendicular to the plate portion; and a wing portion spaced apart from the plate portion with the sidewall portion interposed therebetween. The plate portion of each of the sidewalls comprises a cavity. Each of the sidewalls includes an impact transmitting structure that horizontally overlaps the cavity of the plate portion of each of the sidewalls.

Description

Pack Housing

[0001] The present invention relates to a pack housing for a battery pack. This application claims the benefit of Korean Application No. 10-2023-0149660, filed November 2, 2023, which is incorporated herein by reference in its entirety.

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. Recently, improved energy density and economies of scale have dramatically reduced the per-unit manufacturing cost of secondary batteries. Furthermore, as the range of battery electric vehicles (BEVs) has increased to match that of fuel-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0003] The technological development trend for secondary batteries for mobility is improving energy density and safety. The safety of secondary batteries for mobility is crucial, as it directly impacts the lives of passengers. Safety in secondary batteries can be achieved through mechanical robustness, reliable electrical insulation, and delayed heat transfer in the event of thermal runaway.

[0004] The technical idea of ​​the present invention aims to solve a problem by providing a pack housing with improved mechanical robustness.

[0005] According to exemplary embodiments of the present invention for solving the above-described problem, a pack housing is provided. The pack housing comprises: a plurality of plates coupled to each other; and side walls coupled to the plurality of plates, each of the side walls including a plate portion coupled to the plurality of plates, a side wall portion perpendicular to the plate portion, and a wing portion spaced apart from the plate portion with the side wall portion therebetween, the plate portion of each of the side walls including a cavity, and each of the side walls including a shock transmitting structure horizontally overlapping the cavity of the plate portion of each of the side walls.

[0006] The plate portion of each of the side walls overlaps horizontally with the plurality of plates.

[0007] The shock transmitting structure of each of the side walls is configured to transmit an external shock introduced from the outermost one of the vertical ribs to the plurality of plates.

[0008] The wing portion of each of the side walls includes horizontal ribs parallel to the mounting surfaces of the plurality of plates and vertical ribs perpendicular to the mounting surfaces of the plurality of plates, and the lower portion of each of the vertical ribs and the horizontal rib constitute the shock transmitting structure.

[0009] The shock transmitting structure of each of the side walls is oblique to the mounting surfaces of the plurality of plates.

[0010] The wing portion of each of the side walls includes a vertical rib perpendicular to the mounting surfaces of the plurality of plates, and the shock transmitting structure of each of the side walls connects the vertical rib of the wing portion of each of the side walls and the bottom surface of the plate portion of each of the side walls.

[0011] According to exemplary embodiments, a pack housing is provided. The pack housing comprises: a plurality of plates coupled to each other; and side walls coupled to the plurality of plates, each of the side walls including a plate portion coupled to the plurality of plates, a side wall portion perpendicular to the plate portion, and a wing portion spaced apart from the plate portion with the side wall portion therebetween, the plate portion of each of the side walls including a cavity, and each of the side walls including a shock transmitting structure configured to transmit an external shock introduced into the wing portion of each of the side walls to the plurality of plates.

[0012] The shock transmitting structure of each of the side walls horizontally overlaps the cavity of the plate portion of each of the side walls.

[0013] The shock transmitting structure of each of the side walls horizontally overlaps the cavity of the plate portion of each of the side walls.

[0014] Each of the wing portions of the side walls includes horizontal ribs parallel to the mounting surfaces of the plurality of plates, and vertical ribs perpendicular to the mounting surfaces of the plurality of plates, and

[0015] The lower portion of each of the above vertical ribs and the above horizontal rib constitute the above shock transmitting structure.

[0016] The shock transmitting structure of each of the side walls is oblique to the mounting surfaces of the plurality of plates.

[0017] The wing portion of each of the side walls includes a vertical rib perpendicular to the mounting surfaces of the plurality of plates, and the shock transmitting structure of each of the side walls connects the vertical rib of the wing portion of each of the side walls and the bottom surface of the plate portion of each of the side walls.

[0018] The sidewall of the pack housing according to exemplary embodiments of the present invention includes a shock transfer structure configured to transfer an external shock introduced from the sidewall to plates formed by an extrusion process. Accordingly, when an external shock is applied to the pack housing, a major portion of the external shock can be prevented from being transferred to the battery cell assembly on the pack housing.

[0019] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0020] FIG. 1 is a plan view illustrating a battery pack according to exemplary embodiments.

[0021] Figure 2 is a cross-sectional view taken along the cutting line 1I-1I' of Figure 1.

[0022] FIG. 3 is a cross-sectional view of a battery pack according to other exemplary embodiments.

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0024] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0025] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0026] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0027]

[0028] (Example 1)

[0029] FIG. 1 is a plan view showing a battery pack (100) according to exemplary embodiments.

[0030] Figure 2 is a cross-sectional view taken along the cutting line 1I-1I' of Figure 1.

[0031] Referring to FIGS. 1 and 4, a battery pack (100) may include a pack housing (110), a plurality of battery cell assemblies (120), and cross beams (130). The battery pack (100) may be a final product mounted in an application such as a vehicle.

[0032] The pack housing (110) may provide a space for mounting battery cell assemblies (120). The pack housing (110) may include plates (111, 112, 113, 114, 115) and side walls (116, 117, 118, 119).

[0033] Battery cell assemblies (120) may be arranged on the mounting surface (110M) of the pack housing (110). Two directions substantially parallel to the mounting surface (110M) of the pack housing (110) are defined as the X direction and the Y direction, and a direction substantially perpendicular to the mounting surface (110M) of the pack housing (110) is defined as the Z direction. Each of the X direction, the Y direction, and the Z direction may be substantially perpendicular to each other. Unless otherwise stated, the definitions of the directions are the same for the drawings below. The X direction and the Y direction may be referred to as horizontal directions, and the Z direction may be referred to as a vertical direction.

[0034] Each of the plates (111, 112, 113, 114, 115) and the side walls (116, 117) may be provided by an extrusion process. The extrusion direction of each of the plates (111, 112, 113, 114, 115) and the side walls (116, 117) may be the X direction. The plates (111, 112, 113, 114, 115) and the side walls (116, 117) may be arranged in the Y direction. The side walls (118, 119) may also be provided by an extrusion process.

[0035] In FIG. 1, a pack housing (110) is disclosed that includes five plates (111, 112, 113, 114, 115) between side walls (116, 117), but this is a non-limiting example and does not limit the technical idea of ​​the present invention in any sense. The number of plates (111, 112, 113, 114, 115) may vary depending on the design of the battery pack (100) to be ultimately manufactured.

[0036] The plate (111) may be interposed between the plates (112, 114). The plate (112) may be interposed between the plates (111, 113). The plate (113) may be interposed between the plate (112) and the side wall (116). The plate (114) may be interposed between the plates (111, 115). The plate (115) may be interposed between the plate (114) and the side wall (117).

[0037] Adjacent ones of the plates (111, 112, 113, 114, 115) and side walls (116, 117) can be joined to each other. Adjacent ones of the plates (111, 112, 113, 114, 115) and side walls (116, 117) can be welded to each other.

[0038] Plate (111) can be welded to plates (112, 114). Plate (112) can be welded to plates (111, 113). Plate (113) can be welded to plate (112) and side wall (116). Plate (114) can be welded to plates (111, 115). Plate (115) can be welded to plate (114) and side wall (117).

[0039] According to exemplary embodiments, the plates (111, 112, 113, 114, 115) and the side walls (116, 117) can be joined by friction stir welding. Friction stir welding (FSW) can include treating the joining materials (i.e., the plates (111, 112, 113, 114, 115) and the side walls (116, 117)) with a non-consumable tool (typically including a probe) that rotates at high speed. Frictional heat is generated between the tool and the joining materials, and the joining materials around the tool are softened by the frictional heat. The plastic flow of the joining materials softened by the stirring of the tool can mix the materials on both sides of the joining surface, thereby joining the joining materials to each other.

[0040] During the friction stir welding process, the materials to be joined undergo intensive plastic deformation at high temperatures. The resulting product of friction stir welding may have a microstructure characterized by fine equiaxed grains and may exhibit improved mechanical properties. As a result of friction stir welding, the pack housing (110) may include a weld bead.

[0041] One skilled in the art will readily arrive at an embodiment in which the plates (111, 112, 113, 114, 115) and the side walls (116, 117) are joined by arc welding such as carbon arc welding, plasma arc welding, shielded arc welding, submerged arc welding, MIG (Metal inert gas) welding, TIG (Tungsten inert gas) welding, gas welding, electroslag welding, laser welding, and ultrasonic welding, based on the description herein.

[0042] Each of the plate sections (116P, 117P) of the plates (111, 112, 113, 114, 115) and the side walls (116, 117) may include cooling channels (CH), cavities (CV) and ribs. Each of the cooling channels (CH), cavities (CV) and ribs may extend in the extrusion direction (i.e., X direction).

[0043] The cooling channels (CH) can provide a path for the cooling fluid to flow. The cooling channels (CH) can be spaced apart in the Y direction. The cooling channels (CH) can be arranged along the Y direction.

[0044] The cavities (CV) are empty spaces formed inside the plates (111, 112, 113, 114, 115). Due to the formation of the cavities (CV), the mass of the plates (111, 112, 113, 114, 115) can be reduced, and thus the energy density of the battery pack (100) including the pack housing (110) can be increased.

[0045] The ribs can define cooling channels (CH) and cavities (CV). The ribs can surround the cooling channels (CH) and cavities (CV). The ribs can maintain the airtightness of the cooling channels (CH) and cavities (CV).

[0046] The plate (111) may be located at the center of the pack housing (110). The plate (111) may include a center beam (CB). The center beam (CB) may protrude from the mounting surface (111M) of the plate (111). The center beam (CB) may extend in the X direction. The center beam (CB) may be formed together with the plate (111) by an extrusion process, or a separately provided center beam (CB) may be welded to the mounting surface (111M) of the plate (111).

[0047] The side wall (116) may include a plate portion (116P), a side wall portion (116SW), and a wing portion (116W). The side wall portion (116SW) may be substantially perpendicular to the plate portion (116P). The wing portion (116W) may be on the outside of the side wall portion (116SW). The wing portion (116W) may be spaced apart from the plate portion (116P) with the side wall portion (116SW) therebetween. The wing portion (116W) may include a plurality of coupling holes. The wing portion (116W) may be used for transporting the pack housing (110) or for securing the pack housing (100) (e.g., securing the pack housing (110) to a vehicle or other battery tray).

[0048] The side wall (117) may include a plate portion (117P), a side wall portion (117SW), and a wing portion (117W). The side wall portion (117SW) may be substantially perpendicular to the plate portion (117P). The wing portion (117W) may be on the outside of the side wall portion (117SW). The wing portion (117W) may be spaced apart from the plate portion (117P) with the side wall portion (117SW) therebetween. The wing portion (117W) may include a plurality of coupling holes. The wing portion (117W) may be used for transporting the pack housing (110), or for securing (e.g., securing the pack housing (110) to a vehicle or other battery tray) and transporting the pack housing (100).

[0049] The side wall (117) can be spaced apart from the side wall (116) with plates (111, 112, 113, 114, 115) therebetween. The plate parts (116P, 117P) can form a base plate of the pack housing (110) together with the plates (111, 112, 113, 114, 115).

[0050] Plates (111, 112, 113, 114, 115) and plate parts (116P, 117P) can constitute a base plate of a pack housing (110). The mounting surface (110M) can include mounting surfaces (111M, 112M, 113M, 114M, 115M, 116M, 117M) of plates (111, 112, 113, 114, 115) and plate parts (116P, 117P). The mounting surfaces (111M, 112M, 113M, 114M, 115M, 116M, 117M) of the plates (111, 112, 113, 114, 115) and plate parts (116P, 117P) can form the mounting surface (110M) of the pack housing (110).

[0051] The bottom surface (110B) may be opposite to the mounting surface (110M). The bottom surface (110B) may be substantially parallel to the mounting surface (110M). The bottom surface (110B) may include bottom surfaces (111B, 112B, 113B, 114B, 115B, 116B, 117B) of the plates (111, 112, 113, 114, 115) and plate parts (116P, 117P). The bottom surfaces (111B, 112B, 113B, 114B, 115B, 116B, 117B) of the plates (111, 112, 113, 114, 115) and the plate parts (116P, 117P) can form the bottom surface (110B) of the pack housing (110).

[0052] According to exemplary embodiments, each of the wing sections (116W, 117W) may include horizontal ribs (WH1, WH2, WH3, WH4) and vertical ribs (WV1, WV2, WV3). Each of the horizontal ribs (WH1, WH2, WH3, WH4) of each of the wing sections (116W, 117W) may be substantially parallel to the mounting surface (110M). Each of the vertical ribs (WV1, WV2, WV3) of each of the wing sections (116W, 117W) may be substantially perpendicular to the mounting surface (110M).

[0053] The horizontal ribs (WH1, WH2, WH3, WH4) and vertical ribs (WV1, WV2, WV3) of each of the wing parts (116W, 117W) are the result of an extrusion process and can intersect with each other. That is, each of the horizontal ribs (WH1, WH2, WH3, WH4) can intersect with each of the vertical ribs (WV1, WV2, WV3), and accordingly, each of the wing parts (116, 117) can have sufficient mechanical rigidity.

[0054] According to exemplary embodiments, the horizontal rib (WH4) of each of the wing sections (116W, 117W) may be flush with the bottom surface (110B). According to exemplary embodiments, the horizontal rib (WH4) of each of the wing sections (116W, 117W) may be coplanar with the bottom surface (110B). In another example, the horizontal rib (WH4) of each of the wing sections (116W, 117W) may horizontally (e.g., in the Y direction) overlap the cavities (CV) and the cooling channels (CH).

[0055] According to exemplary embodiments, the horizontal rib (WH3) of each of the wing sections (116W, 117W) may be further from the floor surface (110B) than the horizontal rib (WH4) of each of the wing sections (116W, 117W). According to exemplary embodiments, the horizontal rib (WH2) of each of the wing sections (116W, 117W) may be further from the floor surface (110B) than the horizontal rib (WH3) of each of the wing sections (116W, 117W). According to exemplary embodiments, the horizontal rib (WH1) of each of the wing sections (116W, 117W) may be further from the floor surface (110B) than the horizontal rib (WH2) of each of the wing sections (116W, 117W).

[0056] The vertical rib (WV1) may be at the edge of the pack housing (110). The vertical rib (WV2) may be interposed between the pack housing (110) and the vertical rib (WV2). The vertical rib (WV3) may be interposed between the pack housing (110) and the vertical rib (WV2).

[0057] According to exemplary embodiments, the lower portion of the vertical rib (WV1), the lower portion of the vertical rib (WV2), the lower portion of the vertical rib (WV3), and the horizontal rib (WH4) may form an impact transmission structure (ITP). The impact transmission structure (ITP) may be horizontally (e.g., in the Y direction) overlapped with the plates (111, 112, 113, 114, 115) and the plate sections (116P, 117P). The impact transmission structure (ITP) may be horizontally (e.g., in the Y direction) overlapped with the cooling channels (CH) and cavities (CV) of the plates (111, 112, 113, 114, 115) and the plate sections (116P, 117P). The impact transfer structure (ITP) may include a portion interposed between the mounting surface (110M) and the bottom surface (110B) in the Z direction.

[0058] According to exemplary embodiments, the vertical rib (WV1) may be the outermost one among the vertical ribs (WV1, WV2, WV3). Accordingly, when a lateral impact (i.e., an impact in the Y direction) is applied to the battery pack (100), the lateral impact may be introduced to the battery pack (100) from the vertical rib (WV1). Each of the wing parts (116W, 117W) of the pack housing (110) of the battery pack (100) according to exemplary embodiments includes an impact transfer structure (ITP), so that the impact introduced from the vertical rib (WV1) may be transferred to the plates (111, 112, 113, 114, 115) and the plate parts (116P, 117P). The plates (111, 112, 113, 114, 115) and plate parts (116P, 117P) provided by the extrusion process have relatively high mechanical strength, so that damage and deformation of the battery pack due to external impact can be prevented or mitigated, and most of the impact introduced from the vertical rib (WV1) can be prevented or mitigated from being transmitted to the battery cell assembly (120).

[0059] A plurality of battery cell assemblies (120) may be arranged on plates (111, 112, 113, 114, 115) and plate portions (116P, 117P) of a pack housing (110). The plates (111, 112, 113, 114, 115) and plate portions (116P, 117P) may support the plurality of battery cell assemblies (120). The side walls (116, 117, 118, 119) may horizontally surround the plurality of battery cell assemblies (120). The side walls (116, 117, 118, 119) may protect the plurality of battery cell assemblies (120).

[0060] For example, the battery pack (100) may be of a modular type, and each of the plurality of battery cell assemblies (120) may not include a module frame. As another example, the battery pack (100) may be of a modular type, and each of the plurality of battery cell assemblies (120) may include a module frame.

[0061] Each of the plurality of battery cell assemblies (120) may include a plurality of banks connected in series with each other. Each of the plurality of banks may include one or more parallel-connected battery cells. The number of series-connected banks and the number of parallel-connected battery cells may be determined depending on the magnitude of the voltage and current to be output from each of the battery cell assemblies (120).

[0062] A plurality of battery cells are the basic units of a lithium-ion battery, i.e., a secondary battery. Each of the plurality of battery cells includes an electrode assembly, an electrolyte, and a case. Each of the plurality of battery cells may be any one of a cylindrical battery cell, a prismatic battery cell, and a pouch-type battery cell. The electrode assembly of the cylindrical battery cell is housed in a cylindrical metal can. The electrode assembly of the prismatic battery cell is housed in a prismatic metal can. The electrode assembly of the pouch-type battery cell is housed in a pouch case including an aluminum laminate sheet.

[0063] The electrode assembly may include an anode, a cathode, and a separator interposed between the anode and the cathode. The electrode assembly may be either a jelly-roll type or a stack type. The jelly-roll type electrode assembly may include a winding structure of the anode, the cathode, and the separator interposed therebetween. The stack type electrode assembly may include a plurality of sequentially stacked anodes, a plurality of cathodes, and a plurality of separators interposed therebetween.

[0064] A plurality of battery cell assemblies (120) can be arranged in the X direction and the Y direction. In FIG. 1, the number of the plurality of battery cell assemblies (120) arranged in the X direction is three, and the number of the plurality of battery cell assemblies (120) arranged in the Y direction is two. Therefore, the arrangement of the plurality of battery cell assemblies (120) can be said to be a 3 * 2 arrangement. A person skilled in the art will be able to easily arrive at a plurality of battery cell assemblies (120) arranged in M ​​* N (wherein, M and N are each integers greater than or equal to 2) based on the description herein.

[0065] The center beam (CB) can isolate the plurality of battery cell assemblies (120) in the Y direction. The center beam (CB) can be interposed between the plurality of battery cell assemblies (120). The cross beams (130) can isolate the plurality of battery cell assemblies (120) in the X direction. The cross beams (130) can be interposed between the plurality of battery cell assemblies (120).

[0066] The arrangement of the center beam (CB) and the plurality of battery cell assemblies (120) disclosed in FIG. 1 is a non-limiting example and does not limit the technical concept of the present invention in any way. Those skilled in the art will readily be able to devise battery packs comprising various arrangements and numbers of center beams, cross beams, and battery cell assemblies based on the description herein.

[0067] The battery pack (100) may further include exhaust devices. The exhaust devices may be installed on any one of the side walls (118, 119). The exhaust devices may also be installed on each of the side walls (118, 119). The exhaust devices may be configured to delay thermal propagation by releasing high-temperature gas within the battery pack (100) to the outside when at least one of the plurality of battery cell assemblies (120) is in a thermal runaway state.

[0068] Here, thermal runaway of multiple battery cell assemblies (120) is a state in which temperature changes of multiple battery cell assemblies (120) further accelerate the temperature change, which is an uncontrollable positive feedback. Multiple battery cell assemblies (120) in a state of thermal runaway exhibit a rapid temperature increase and emit a large amount of high-pressure gas and combustion debris.

[0069] The battery pack (100) may further include electrical components. The electrical components may be mounted on the pack housing (110). The space between the cross beam (130) and the side wall (118) may be an electrical component mounting area. The electrical components may include any electronic components necessary to operate the battery pack.

[0070] The electrical components may include, for example, a Battery Management System (BMS). The BMS may be configured to monitor, balance, and control the battery pack. Monitoring of the battery pack (100) may include measuring voltage and current of specific nodes within a plurality of battery cell assemblies (120) and measuring temperature of set locations within the battery pack (100). The battery pack (100) may include measuring instruments for measuring the voltage, current, and temperature described above.

[0071] Balancing of a battery pack (100) is an operation that reduces the deviation between multiple battery cell assemblies (120). Control of the battery pack (100) includes preventing overcharge, overdischarge, and overcurrent. Through monitoring, balancing, and control, the battery pack (100) can operate under optimal conditions, thereby preventing shortening of the lifespan of each of the multiple battery cell assemblies (120).

[0072] The electrical components may further include a cooling device, a PRA (Power Relay Assembly), a safety plug, etc. The cooling device may include a cooling fan. The cooling fan may prevent overheating of each of the plurality of battery cell assemblies (120) by circulating air inside the battery pack (100). The PRA may be configured to supply or cut off power from the high-voltage battery to an external load (e.g., a vehicle motor). The PRA may protect the plurality of battery cell assemblies (120) and the external load (e.g., a vehicle motor) by cutting off power supply to the external load (e.g., a vehicle motor) in a situation where an abnormal voltage, such as a voltage surge, occurs.

[0073] The battery pack (100) may further include a plurality of bus bars configured to electrically connect a plurality of battery cell assemblies (120). The plurality of battery cell assemblies (120) may be connected in series by the plurality of bus bars. Accordingly, the battery pack (100) may be configured to output a high voltage to an external load (e.g., a vehicle motor).

[0074] The battery pack (100) may further include a lead plate coupled to the side walls (116, 117, 118, 119). The lead plate may cover elements mounted inside the battery pack (100), such as battery cell assemblies (120) and electrical components. The lead plate may be secured to the battery pack (100) by a mechanical coupling means, such as a fastening member.

[0075]

[0076] (Example 2)

[0077] Fig. 3 is a cross-sectional view showing a battery pack (100') according to other exemplary embodiments. Fig. 3 shows a portion corresponding to Fig. 2.

[0078] Referring to FIG. 3, a battery pack (100') may include a pack housing (110'), a plurality of battery cell assemblies (120), and cross beams. The plurality of battery cell assemblies (120) and cross beams (130) are substantially the same as those described with reference to FIGS. 1 and 2.

[0079] The plates (111, 112, 113, 114, 115) of the pack housing (110) are substantially the same as those described with reference to FIGS. 1 and 2. The side walls (116', 117') are substantially the same as the side walls (116, 117) of FIGS. 1 and 2, except for the wing sections (116W', 117W').

[0080] According to exemplary embodiments, each of the wing sections (116W, 117W) may include horizontal ribs (WH1, WH2, WH3, WH3), vertical ribs (WV1, WV2, WV3) and an impact transfer structure (ITP). Each of the horizontal ribs (WH1, WH2, WH3, WH3) of each of the wing sections (116W, 117W) may be substantially parallel to the mounting surface (110M). Each of the vertical ribs (WV1, WV2, WV3) of each of the wing sections (116W, 117W) may be substantially perpendicular to the mounting surface (110M). The impact transfer structure (ITP) of each of the wing sections (116W, 117W) may be oblique to the mounting surface (110M).

[0081] The horizontal ribs (WH1, WH2, WH3, WH3) and vertical ribs (WV1, WV2, WV3) of each of the wing parts (116W, 117W) are the result of an extrusion process and can intersect with each other. That is, each of the horizontal ribs (WH1, WH2, WH3, WH3) can intersect with each of the vertical ribs (WV1, WV2, WV3), and accordingly, each of the wing parts (116, 117) can have sufficient mechanical rigidity.

[0082] According to exemplary embodiments, the shock transfer structure (ITP) of each of the wing parts (116W, 117W) may connect the vertical rib (WV1) and the bottom surface (110B). The shock transfer structure (ITP) of each of the wing parts (116W, 117W) may be connected to the vertical rib (WV1) and the bottom surface (110B), respectively. The shock introduced from the vertical rib (WV1) may be transferred to the plates (111, 112, 113, 114, 115) and the plate parts (116P, 117P) through the shock transfer structure (ITP'). Accordingly, damage and deformation of the battery pack due to external shock may be prevented or mitigated, and most of the shock introduced from the vertical rib (WV1) may be prevented or mitigated from being transferred to the battery cell assembly (120).

[0083]

[0084] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A plurality of plates joined together; and As side walls coupled to the plurality of plates, each of the side walls includes a plate portion coupled to the plurality of plates, a side wall portion perpendicular to the plate portion, and a wing portion spaced apart from the plate portion with the side wall portion therebetween. Each of the above side walls includes a cavity in the plate portion, and A pack housing characterized in that each of the side walls includes a shock transmitting structure that horizontally overlaps the cavity of the plate portion of each of the side walls.

2. In paragraph 1, A pack housing characterized in that the plate portion of each of the side walls horizontally overlaps the plurality of plates.

3. In paragraph 1, A pack housing characterized in that the shock transmitting structure of each of the side walls is configured to transmit an external shock introduced from the outermost one of the vertical ribs to the plurality of plates.

4. In paragraph 1, Each of the wing portions of the side walls includes horizontal ribs parallel to the mounting surfaces of the plurality of plates, and vertical ribs perpendicular to the mounting surfaces of the plurality of plates, A pack housing characterized in that the lower portion of each of the vertical ribs and the horizontal rib constitute the shock transmitting structure.

5. In paragraph 1, A pack housing characterized in that the shock transmitting structure of each of the side walls is slanted to the mounting surfaces of the plurality of plates.

6. In paragraph 1, Each of the wing portions of the side walls includes a vertical rib perpendicular to the mounting surfaces of the plurality of plates, and A pack housing characterized in that the shock transmitting structure of each of the side walls connects the vertical rib of the wing portion of each of the side walls and the bottom surface of the plate portion of each of the side walls.

7. A plurality of plates joined together; and As side walls coupled to the plurality of plates, each of the side walls includes a plate portion coupled to the plurality of plates, a side wall portion perpendicular to the plate portion, and a wing portion spaced apart from the plate portion with the side wall portion therebetween. Each of the above side walls includes a cavity in the plate portion, and A pack housing characterized in that each of the side walls includes a shock transmission structure configured to transmit an external shock introduced into the wing portion of each of the side walls to the plurality of plates.

8. In paragraph 7, A pack housing characterized in that the shock transmitting structure of each of the side walls horizontally overlaps with the cavity of the plate portion of each of the side walls.

9. In paragraph 7, A pack housing characterized in that the shock transmitting structure of each of the side walls horizontally overlaps with the cooling channel of the plate portion of each of the side walls.

10. In paragraph 7, Each of the wing portions of the side walls includes horizontal ribs parallel to the mounting surfaces of the plurality of plates, and vertical ribs perpendicular to the mounting surfaces of the plurality of plates, A pack housing characterized in that the lower portion of each of the vertical ribs and the horizontal rib constitute the shock transmitting structure.

11. In paragraph 7, A pack housing characterized in that the shock transmitting structure of each of the side walls is slanted to the mounting surfaces of the plurality of plates.

12. In paragraph 7, Each of the wing portions of the side walls includes a vertical rib perpendicular to the mounting surfaces of the plurality of plates, and A pack housing characterized in that the shock transmitting structure of each of the side walls connects the vertical rib of the wing portion of each of the side walls and the bottom surface of the plate portion of each of the side walls.

Images