Pack housing and method for manufacturing same

Abstract

According to an exemplary embodiment, a pack housing is provided, the pack housing including a center plate, side plates coupled to the center plate, and side beams coupled to the side plates, each of the side plates including a reinforcing bead extending in a first direction, the first direction being parallel to a mounting surface of each of the side plates.

Description

[Technical Field]

[0001] The present invention relates to a pack housing for use in a battery pack and a method for manufacturing the same. This application claims the benefit of Korean Application No. 10-2023-0119029, filed on September 7, 2023, which is incorporated herein by reference in its entirety. [Background technology]

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for a variety of wireless devices, such as handsets, laptops, and wireless vacuum cleaners. In recent years, improvements in energy density and economies of scale have dramatically reduced the manufacturing cost per unit capacity of secondary batteries. As the driving range of battery electric vehicles (BEVs) has increased to the same level as fuel-powered vehicles, the primary use of secondary batteries has shifted from mobile devices to mobility.

[0003] The technological development trends for secondary batteries for mobility applications are toward improvements in energy density and safety. The safety of secondary batteries for mobility applications is extremely important because it directly affects the lives of passengers. The safety of secondary batteries can be achieved through mechanical robustness, reliable electrical insulation, and delayed heat transfer in the event of a thermal runaway event. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the technical idea of ​​the present invention aims to solve is to provide a pack housing and a method for manufacturing the same that have improved reliability and mechanical robustness. [Means for solving the problem]

[0005] According to an exemplary embodiment of the present invention, there is provided a pack housing including a center plate, side plates coupled to the center plate, and side beams coupled to the side plates, each of the side plates including a reinforcing bead extending in a first direction, the first direction being parallel to a mounting surface of each of the side plates.

[0006] Each of the side plates includes a lower surface opposite the mounting surface, and the reinforcing bead of each of the side plates is on the lower surface of each of the side plates.

[0007] The reinforcing bead of each of the side plates is solid.

[0008] The reinforcing bead of each of the side plates is hollow.

[0009] The center plate includes a center reinforcing bead extending in the first direction.

[0010] The center plate includes a center beam extending in the first direction.

[0011] The side plates are spaced apart in a second direction perpendicular to the first direction with the center plate therebetween.

[0012] The height of the reinforcing beads is in the range of 0.1 mm to 10 mm.

[0013] According to an exemplary embodiment, there is provided a method of manufacturing a pack housing, the method including the steps of extruding a center plate, side plates, and side walls, aligning the center plate, the side plates, and the side walls such that the side plates are spaced apart with the center plate therebetween and the side walls are spaced apart with the center plate therebetween, bonding a reinforcing structure to the side walls, and welding the center plate, the side plates, and the side walls.

[0014] Each of the side plates includes a reinforcing bead extending in a first direction, the reinforcing bead of each of the side plates being formed by extrusion of the side plate.

[0015] The reinforcing structure is perpendicular to the extrusion direction of the center plate, the side plates, and the side walls.

[0016] The reinforcing structure is connected to the sidewall by bolting.

[0017] The reinforcing structure is coupled to the sidewall by welding.

[0018] The method further includes separating the reinforcement structure from the sidewall. [Effects of the Invention]

[0019] According to an exemplary embodiment of the present invention, deflection of the center plate, side plates, and side walls of the pack housing can be prevented when they are welded, thereby improving the mechanical robustness and reliability of the pack housing.

[0020] The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood from the following description by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong. In other words, unintended effects accompanying the implementation of the exemplary embodiments of the present disclosure can also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a pack housing according to an exemplary embodiment. [Figure 2] FIG. 1 is a perspective view of a pack housing according to an exemplary embodiment. [Figure 3] FIG. 2 is a cross-sectional view taken along the line 1I-1I′ in FIG. [Figure 4] FIG. 1 is a plan view of a battery pack according to an exemplary embodiment. [Figure 5] FIG. 10 is a cross-sectional view of a pack housing according to another exemplary embodiment. [Figure 6] FIG. 10 is a cross-sectional view of a pack housing according to another exemplary embodiment. [Figure 7] FIG. 10 is a cross-sectional view of a pack housing according to another exemplary embodiment. [Figure 8] 1 is a flowchart illustrating a method for manufacturing a pack housing according to an exemplary embodiment. [Figure 9] 10A-10C are cross-sectional views illustrating a method of manufacturing a pack housing according to an exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, it should be noted that the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to best describe his / her own invention.

[0023] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0024] Furthermore, in the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0025] The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and therefore the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown in a schematic manner for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0026] (First embodiment) FIG. 1 is a perspective view of a pack housing 110 according to an exemplary embodiment.

[0027] FIG. 2 is a perspective view of a pack housing 110 according to an exemplary embodiment.

[0028] FIG. 3 is a cross-sectional view taken along the line 1I-1I' in FIG.

[0029] 1 to 3, the pack housing 110 can provide a space for mounting the battery cell assemblies 120 (see FIG. 4), which will be described later. The pack housing 110 can include a center plate 111, side plates 112, 113, 114, and 115, and side walls 116 and 117. The battery cell assemblies 120 (see FIG. 4) can be disposed on mounting surfaces 111M, 112M, 113M, 114M, and 115M of the center plate 111 and the side plates 112, 113, 114, and 115.

[0030] The X and Y directions are defined as two directions substantially parallel to the mounting surfaces 111M, 112M, 113M, 114M, and 115M of the center plate 111 and the side plates 112, 113, 114, and 115, respectively, and the Z direction is defined as a direction substantially perpendicular to the mounting surfaces 111M, 112M, 113M, 114M, and 115M of the center plate 111 and the side plates 112, 113, 114, and 115, respectively. The X, Y, and Z directions may be substantially perpendicular to each other. Unless otherwise specified, the definitions of the directions are the same for the following drawings.

[0031] The center plate 111 and the side plates 112, 113, 114, and 115 may be formed by an extrusion process, and the extrusion direction of the center plate 111 and the side plates 112, 113, 114, and 115 may be the X direction. The center plate 111 and the side plates 112, 113, 114, and 115 may be arranged in the Y direction.

[0032] The center plate 111 can be interposed between the side plates 112, 113 and the side plates 114, 115. Although four side plates 112, 113, 114, 115 and the center plate 111 interposed therebetween are shown in Figures 1 to 5, this is a non-limiting example and does not limit the technical concept of the present invention in any way. The number of side plates 112, 113, 114, 115 can be changed depending on the design of the battery pack 100 (see Figure 6) to be finally manufactured.

[0033] The center plate 111 and the side plates 112, 113, 114, and 115 can be joined together by, for example, friction stir welding, which allows for welded surfaces to be formed between the center plate 111 and the side plates 112, 113, 114, and 115.

[0034] However, the center plate 111 and the side plates 112, 113, 114, 115 may be joined by methods such as arc welding, laser welding, electron beam welding, friction welding, ultrasonic welding, and the like.

[0035] Each of the center plate 111 and the side plates 112, 113, 114, and 115 may include a cooling channel CH, a cavity CVT, and a rib. Each of the cooling channel CH, the cavity CVT, and the rib may extend in the extrusion direction (i.e., the X direction).

[0036] The cooling channels CH may provide a path through which a cooling fluid flows. The cooling channels may be spaced apart in the Y direction. The cooling channels may be arranged along the Y direction.

[0037] The hollow CVT is an empty space formed inside the center plate 111 and the side plates 112, 113, 114, and 115. The formation of the hollow CVT can reduce the mass of the center plate 111 and the side plates 112, 113, 114, and 115, thereby improving the energy density of the battery pack 100 (see FIG. 6 ) including the pack housing 110.

[0038] The ribs may define the cooling channel CH and the cavity CVT. The ribs may surround the cooling channel CH and the cavity CVT. The ribs may maintain the cooling channel CH and the cavity CVT airtight.

[0039] The center plate 111 may include a center beam CB. The center beam CB may protrude from a mounting surface 111M of the center plate 111. The center beam CB may extend in the X direction.

[0040] Each of the side plates 112, 113, 114, and 115 may include a reinforcing bead REB. Each of the reinforcing bead REB of each of the side plates 112, 113, 114, and 115 may extend in the X direction. The length of each of the reinforcing bead REB of each of the side plates 112, 113, 114, and 115 may be substantially the same as the length of each of the side plates 112, 113, 114, and 115.

[0041] The reinforcing bead REB of each of the side plates 112, 113, 114, and 115 may be located on the lower surface 112B, 113B, 114B, and 115B of the side plates 112, 113, 114, and 115. The reinforcing bead REB of each of the side plates 112, 113, 114, and 115 may protrude from the lower surface 112B, 113B, 114B, and 115B of the side plates 112, 113, 114, and 115. The lower surface 112B may be opposite the mounting surface 112M. The lower surface 113B may be opposite the mounting surface 113M. The lower surface 114B may be opposite the mounting surface 114M. The lower surface 115B may be opposite the mounting surface 115M.

[0042] In this example, the reinforcing bead REB may be solid. This allows the height of the reinforcing bead REB to be minimized, thereby improving the energy density of the battery pack 100 (see FIG. 4) including the pack housing 110. According to an exemplary embodiment, the height of each of the reinforcing bead REB may be in the range of about 0.1 mm to about 10 mm. According to an exemplary embodiment, the height of each of the reinforcing bead REB may be about 0.5 mm or more. According to an exemplary embodiment, the height of each of the reinforcing bead REB may be about 5 mm or less. According to an exemplary embodiment, the height of each of the reinforcing bead REB may be about 3 mm or less.

[0043] Furthermore, when a cover plate is joined to the bottom of the pack housing 110 (that is, to the bottom surfaces 112B, 113B, 114B, 115B of the side plates 112, 113, 114, 115), interference between the reinforcing bead REB and the cover plate can be prevented.

[0044] According to an exemplary embodiment, the reinforcing bead REB can prevent each of the side plates 112, 113, 114, 115 from deflecting in the X direction, thereby improving the mechanical robustness and reliability of the pack housing 110.

[0045] The sidewall 116 can be formed by an extrusion process, thereby allowing the sidewall 116 to include cooling channels and cavities. The sidewall 116 can include a plate portion 116P, a sidewall portion 116SW, and a wing portion 116W. The sidewall portion 116SW can be substantially perpendicular to the plate portion 116P. The wing portion 116W can be outside the sidewall portion 116SW. The wing portion 116W can include a plurality of connecting holes. The wing portion 116W can be used for transporting the pack housing 110 or for securing and transporting the pack housing 100 (see FIG. 4 ) (e.g., securing the pack housing 110 to a vehicle or other battery tray).

[0046] The sidewall 117 may be formed by an extrusion process, allowing the sidewall 117 to include cooling channels and cavities. The sidewall 117 may include a plate portion 117P, a sidewall portion 117SW, and a wing portion 117W. The plate portions 116P and 117P, together with the center plate 111 and the side plates 112, 113, 114, and 115, may form a base plate of the pack housing 110. The sidewall portion 117SW may be substantially perpendicular to the plate portion 117P. The wing portion 117W may be located outside the sidewall portion 117SW. The wing portion 117W may include a plurality of connecting holes. The wing portion 117W may be used for transporting the pack housing 110 or for securing and transporting the pack housing 100 (see FIG. 4 ) (e.g., securing the pack housing 110 to a vehicle or other battery tray).

[0047] (Second embodiment) FIG. 4 is a plan view of a battery pack according to an exemplary embodiment.

[0048] Referring to FIGS. 1-4, a battery pack 100 may include a pack housing 110 and a plurality of battery cell assemblies 120.

[0049] The pack housing 110 is substantially the same as that described with reference to FIGS. 1 to 3. The plurality of battery cell assemblies 120 can be disposed on a center plate 111 and side plates 112, 113, 114, and 115 of the pack housing 110. The center plate 111 and the side plates 112, 113, 114, and 115 can support the plurality of battery cell assemblies 120. The side walls 116, 117 and additional side walls can horizontally surround the plurality of battery cell assemblies 120. The side walls 116, 117 and additional side walls can protect the plurality of battery cell assemblies 120.

[0050] As one example, the battery pack 100 may be of a moduleless 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.

[0051] Each of the plurality of battery cell assemblies 120 may include a plurality of banks connected in series to each other. Each of the plurality of banks may include one or more battery cells connected in parallel. The number of banks connected in series and the number of battery cells connected in parallel may be determined depending on the magnitude of the voltage and current to be output from each of the battery cell assemblies 120.

[0052] The battery cells are the basic units of a lithium-ion battery, i.e., a secondary battery. Each of the battery cells includes an electrode assembly, an electrolyte, and a case. Each of the 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.

[0053] The electrode assembly may include a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes. The electrode assembly may be either a jelly roll type or a stack type. A jelly roll type electrode assembly may include a rolled structure of a positive electrode, a negative electrode, and a separator interposed therebetween. A stack type electrode assembly may include a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween, which are stacked in sequence.

[0054] The 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, such an arrangement of the plurality of battery cell assemblies 120 can be said to be a 3*2 arrangement. Based on what is described herein, a person of ordinary skill in the art can easily arrive at an arrangement of M*N battery cell assemblies 120 (where M and N are each an integer greater than or equal to 2).

[0055] The center beam CB can separate the multiple battery cell assemblies 120 in the Y direction. The center beam CB can be interposed between the multiple battery cell assemblies 120. According to an exemplary embodiment, the battery pack 100 can further include cross beams that separate the multiple battery cell assemblies 120 in the X direction.

[0056] 1 is a non-limiting example and does not limit the technical concept of the present invention in any way. Based on what is described herein, a person skilled in the art can easily arrive at a battery pack including a variety of arrangements and numbers of center beams, cross beams, and battery cell assemblies.

[0057] The battery pack 100 may further include an exhaust device. The exhaust device may be configured to slow down thermal propagation by releasing high-temperature gases inside the battery pack 100 to the outside when at least one of the plurality of battery cell assemblies 120 is in a thermal runway state.

[0058] Here, thermal runaway of the battery cell assemblies 120 is a state in which the temperature change of the battery cell assemblies 120 accelerates the temperature change, which is an uncontrollable positive feedback. The battery cell assemblies 120 in a thermal runaway state exhibit a rapid temperature rise and emit a large amount of high-pressure gas and combustion debris.

[0059] The battery pack 100 may further include electrical components that may be mounted on the pack housing 110. The electrical components may include any electronic elements required to operate the battery pack.

[0060] The electrical components may include, for example, a BMS (Battery Management System). The BMS may be configured to monitor, balance, and control the battery pack. Monitoring the battery pack 100 may include measuring the voltage and current of specific nodes within the multiple battery cell assemblies 120 and measuring the temperature at a set location within the battery pack 100. The battery pack 100 may include instruments for measuring the voltage, current, and temperature described above.

[0061] Balancing the battery pack 100 is an operation to reduce the deviation between the multiple battery cell assemblies 120. Controlling the battery pack 100 includes preventing overcharging, over-discharging, and overcurrent. Through monitoring, balancing, and control, the battery pack 100 can operate under optimal conditions, thereby preventing a shortened lifespan of each of the multiple battery cell assemblies 120.

[0062] The electrical components may further include a cooling device, a power relay assembly (PRA), a safety plug, etc. The cooling device may include a cooling fan. The cooling fan circulates air inside the battery pack 100 to prevent overheating of each of the plurality of battery cell assemblies 120. 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 can protect the plurality of battery cell assemblies 120 and the external load (e.g., a vehicle motor) by cutting off the power supply to the external load (e.g., a vehicle motor) in a situation where an abnormal voltage such as a voltage surge occurs.

[0063] The battery pack 100 may further include a plurality of bus bars configured to electrically connect the plurality of battery cell assemblies 120. The plurality of battery cell assemblies 120 may be connected in series by the plurality of bus bars, thereby enabling the battery pack 100 to be configured to output a high voltage to an external load (e.g., a vehicle motor).

[0064] The battery pack 100 may further include lead plates coupled to the side walls 116, 117 and the additional side wall. The lead plates may cover elements mounted inside the battery pack 100, such as the battery cell assembly 120 and electrical components. The lead plates may be fixed to the battery pack 100 by mechanical coupling means, such as fasteners.

[0065] (Third embodiment) FIG. 5 is a cross-sectional view of a pack housing 110' according to another exemplary embodiment.

[0066] 5, pack housing 110′ may include center plate 111′, side plates 112, 113, 114, 115, and side walls 116, 117. Side plates 112, 113, 114, 115 and side walls 116, 117 are substantially the same as those described with reference to FIGS. 1 to 3, and therefore, a repeated description thereof will be omitted.

[0067] 1 to 3, the center plate 111' may further include a reinforcing bead REB. This may improve the resistance of the center plate 111' to bending, thereby improving the mechanical robustness and reliability of the pack housing 110'. In FIG. 5, the reinforcing bead REB of the center plate 111' is solid, but unlike the illustration, the reinforcing bead REB of the center plate 111' may be hollow.

[0068] (Fourth embodiment) FIG. 6 is a cross-sectional view of a pack housing 110'' according to another exemplary embodiment. Referring to FIG. 6, the pack housing 110'' can include a center plate 111, side plates 112', 113', 114', 115', and side walls 116 and 117. The center plate 111 and the side walls 116 and 117 are substantially the same as those described with reference to FIGS. 1 to 3, and therefore a repeated description thereof will be omitted.

[0069] The side plates 112', 113', 114', and 115' may be substantially the same as the side plates 112, 113, 114, and 115 of FIGS. 1 to 3 , except for the reinforcing beads REB'. Each of the side plates 112', 113', 114', and 115' may include a reinforcing bead REB'. Each of the reinforcing beads REB' may extend in the X direction. Each of the reinforcing beads REB' may include a cavity. Each of the reinforcing beads REB' may be hollow. This ensures mechanical robustness of the side plates 112', 113', 114', and 115', while improving the energy density of a battery pack including the side plates 112', 113', 114', and 115' due to the reduced weight of the reinforcing beads REB'.

[0070] The cavities in the reinforcing bead REB′ may not be for the flow of cooling fluid. The cavities in the reinforcing bead REB′ may not be connected to a cooling fluid supply device. The cavities in the reinforcing bead REB′ may be isolated from the cooling fluid supply device. The cavities in the reinforcing bead REB′ may have a different shape than the cooling channels CH. As an example, the cooling channels CH may have a circular cross section, and the cavities in the reinforcing bead REB′ may have a square cross section.

[0071] (Fifth embodiment) FIG. 7 is a cross-sectional view of a pack housing 110''' according to another exemplary embodiment.

[0072] 7, pack housing 110''' can include a center plate 111, side plates 112, 113, 114, 115, side walls 116, 117, and a reinforcing structure 118. Center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 are substantially the same as those described with reference to FIGS. 1 to 3, and therefore, a repeated description thereof will be omitted.

[0073] According to an exemplary embodiment, the reinforcing structure 118 may be coupled to the side walls 116, 117. The reinforcing structure 118 may have a generally rod-like shape. The reinforcing structure 118 may extend in the Y direction.

[0074] According to an exemplary embodiment, the reinforcing structure 118 can be coupled to the side walls 116, 117 by welding. According to another exemplary embodiment, the reinforcing structure 118 can be coupled to the side walls 116, 117 by bolting. The reinforcing structure 118 can include a bar and a leg. The bar of the reinforcing structure 118 can be substantially parallel to the Y direction, and the leg of the reinforcing structure 118 can be substantially parallel to the Z direction.

[0075] According to an exemplary embodiment, the reinforcing structure 118 can prevent deflection of the center plate 111 and the side plates 112, 113, 114, 115 in the Y direction, thereby improving the mechanical robustness and reliability of the pack housing 110'''.

[0076] (Sixth embodiment) FIG. 8 is a flowchart illustrating a method for manufacturing pack housing 110 (see FIG. 1) according to an exemplary embodiment.

[0077] FIG. 9 is a cross-sectional view illustrating a method for manufacturing pack housing 110 (see FIG. 1) according to an exemplary embodiment.

[0078] 2, 3, and 8, in P110, the center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 can be extruded. Because the center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 are formed by an extrusion process, they can have a relatively long length (e.g., length in the X direction) and a constant cross section along the X direction (e.g., YZ cross section). However, without being limited thereto, the center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 can be mechanically machined, and the center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 can also have variable cross sections. For example, the center plate 111, side plates 112, 113, 114, 115, and side walls 116, 117 can include a first portion having a constant cross-section and a second portion having a variable cross-section.

[0079] This allows the cross sections perpendicular to the X direction (i.e., on the YZ plane) of the center plate 111, the side plates 112, 113, 114, and 115, and the side walls 116 and 117 to be constant. The extrusion process allows the channels CH and cavities CVT of the center plate 111 and the side plates 112, 113, 114, and 115 to be formed.

[0080] The reinforcing beams REB may also be formed during the extrusion process of the center plate 111 and the side plates 112, 113, 114, and 115. As a result, each of the reinforcing beams REB may be substantially parallel to the X direction, which is the extrusion direction of the center plate 111 and the side plates 112, 113, 114, and 115.

[0081] Next, in P120, the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 can be aligned. Aligning the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 can include placing the center plate 111 in the center of the side plates 112, 113, 114, 115, placing the center plate 111 and the side plates 112, 113, 114, 115 between the side walls 116, 117, and fixing them using a fixing means such as a jig.

[0082] 8 and 9, at P130, a reinforcing structure 118 may be coupled to the side walls 116, 117. The reinforcing structure 118 may be coupled to the side walls 116, 117 by bolting and / or welding.

[0083] Subsequently, at P140, the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 can be welded together. According to an exemplary embodiment, while the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 are being welded together, the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 can be supported by the reinforcing bead REB and the reinforcing structure 118, thereby preventing the center plate 111, the side plates 112, 113, 114, 115, and the side walls 116, 117 from deflecting.

[0084] Subsequently, at P150, the reinforcing structure 118 can be separated from the side walls 116, 117. The reinforcing structure 118 can be separated by application of physical force, unbolting, etc. In some cases, separation of the reinforcing structure 118 may be omitted.

[0085] The present invention has been described in more detail above with reference to the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, at the time of filing this application, there may be various equivalents and modifications that can replace them.

Claims

1. Center plate and a side plate coupled to the center plate; a side beam coupled to the side plate; and Each of the side plates includes a reinforcing bead extending in a first direction; The puck housing, wherein the first direction is parallel to the mounting surfaces of the side plates.

2. each of the side plates includes a lower surface opposite the mounting surface; The pack housing of claim 1 , wherein the reinforcing bead of each of the side plates is on the underside of each of the side plates.

3. The pack housing of claim 1 or 2, wherein the reinforcing bead of each of the side plates is solid.

4. The pack housing of claim 1 or 2, wherein the reinforcing bead of each of the side plates is hollow.

5. The pack housing of claim 1 , wherein the center plate includes a center reinforcing bead extending in the first direction.

6. The pack housing according to claim 1 , wherein the center plate includes a center beam extending in the first direction.

7. The pack housing according to claim 1 , wherein the side plates are spaced apart in a second direction perpendicular to the first direction with the center plate therebetween.

8. 2. The pack housing of claim 1, wherein the height of the reinforcing bead is in the range of 0.1 mm to 10 mm.

9. extruding a center plate, a side plate, and a side wall; aligning the center plate, the side plates, and the side walls, wherein the side plates are spaced apart with the center plate therebetween and the side walls are spaced apart with the center plate and the side plates therebetween; coupling a reinforcement structure to the sidewall; welding the center plate, the side plates, and the side walls together; A method for manufacturing a pack housing, comprising:

10. Each of the side plates includes a reinforcing bead extending in a first direction; 10. The method of manufacturing a pack housing according to claim 9, wherein the reinforcing bead of each of the side plates is formed by extrusion of the side plate.

11. 10. The method of manufacturing a pack housing according to claim 9, wherein the reinforcing structure is perpendicular to the extrusion direction of the center plate, the side plates, and the side walls.

12. 10. The method of manufacturing a pack housing of claim 9, wherein the reinforcing structure is coupled to the side wall by bolting.

13. 10. The method of manufacturing a pack housing of claim 9, wherein the reinforcing structure is coupled to the side wall by welding.

14. The method of manufacturing a pack housing of claim 9 further comprising the step of separating the reinforcing structure from the sidewall.

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