Battery pack

Abstract

According to an example embodiment, a battery pack is provided. The battery pack can include a battery pack case including a base plate, a middle beam extending in a first direction on the base plate, and a cross beam on the base plate crossing the middle beam and extending in a second direction perpendicular to the first direction; a battery cell assembly on the base plate; and a first adhesive layer between the cross beam and the base plate.

Description

Technical Field

[0001] This disclosure relates to a battery pack. This application claims the benefit of priority to Korean Patent Application No. 10-2024-0158836, filed on November 11, 2024, the entire contents of which are incorporated herein by reference. Background Technology

[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, such as mobile phones, laptops, and cordless vacuum cleaners. Recently, due to increased energy density and economies of scale, the manufacturing cost per unit capacity of secondary batteries has significantly decreased, and with the cruising range of BEVs (Battery Electric Vehicles) increasing to levels comparable to fuel cell vehicles, the primary application of secondary batteries is expanding from mobile devices to automobiles.

[0003] The trend in the technological development of secondary batteries for automobiles is to improve energy density and safety. Here, the energy density of a secondary battery is a value obtained by dividing the maximum electrical energy that the secondary battery can store by its mass. Since the high energy density of secondary batteries is directly related to the driving efficiency and cruising range of a vehicle, various studies are underway to improve the energy density of secondary batteries.

[0004] One of the main solutions for increasing the energy density of secondary batteries is the modular battery pack (or cell-to-pack) structure. Because modular battery packs omit the modules covering the individual battery cells, the weight of the battery pack can be significantly reduced. Summary of the Invention

[0005] Technical issues

[0006] The technical problem to be solved by this disclosure is to provide a battery pack with improved shock resistance and safety.

[0007] Technical solution

[0008] According to an exemplary embodiment of the present disclosure for solving the above-described problems, a battery pack is provided. The battery pack may include: a battery pack housing including a base plate, an intermediate beam extending in a first direction on the base plate, and a crossbeam on the base plate intersecting the intermediate beam and extending in a second direction perpendicular to the first direction; a battery cell assembly located on the base plate; and a first adhesive layer located between the crossbeam and the base plate.

[0009] The battery cell assembly may further include: a battery cell stack comprising a plurality of battery cells arranged in a first direction; and a side beam located on a side of the battery cell stack in the first direction. The battery pack may further include bolts for securing the side beam to the crossbeam.

[0010] Each bolt can be spaced apart from the base plate in a third direction, which is perpendicular to the first direction and the second direction, respectively.

[0011] The side beam may include multiple recesses, each designed to accommodate a bolt.

[0012] The battery pack may further include bolts that fasten the crossbeam to the intermediate beam.

[0013] The battery pack may further include a second adhesive layer located between the intermediate beam and the crossbeam.

[0014] The battery pack housing may further include multiple sidewalls on a base plate parallel to the intermediate beam. The battery pack may further include a welded layer between each of the multiple sidewalls and the crossbeam.

[0015] The battery pack may further include a welded layer located between the intermediate beam and the crossbeam.

[0016] The first adhesive layer may include a plurality of adhesive patterns spaced apart in a second direction. The battery pack may further include a plurality of welding patterns spaced apart in a second direction between the crossbeam and the substrate. The adhesive patterns and welding patterns may be arranged alternately.

[0017] According to an exemplary embodiment of this disclosure for solving the above-described problems, a battery pack is provided. The battery pack may include: a base plate including cooling channels; an intermediate beam extending in a first direction on the base plate; a crossbeam intersecting the intermediate beam and extending in a second direction perpendicular to the first direction on the base plate; a battery cell assembly located on the base plate, wherein the battery cell assembly includes a battery cell stack comprising a plurality of battery cells arranged in the first direction and a side beam located on a side of the battery cell stack in the first direction; and a first bolt securing the side beam to the crossbeam. Each first bolt may be spaced apart from the cooling channels in a third direction perpendicular to the first and second directions.

[0018] The battery pack may further include an adhesive layer located between the base plate and the crossbeam.

[0019] The battery pack may further include an adhesive layer located between the intermediate beam and the crossbeam.

[0020] The battery pack may further include a welded layer located between the intermediate beam and the crossbeam.

[0021] The battery pack may further include: sidewalls, which are perpendicular to the base plate and the crossbeam respectively; and a welding layer located between the crossbeam and the sidewalls.

[0022] The side beam may include multiple recesses to accommodate each first bolt.

[0023] Beneficial effects

[0024] According to exemplary embodiments of this disclosure, assembling the battery pack by bolting the side beams to crossbeams that are welded and / or bonded to the battery pack housing can improve the battery pack's impact resistance. Additionally, by expanding the cooling channels, the cooling performance of the battery pack can be enhanced to improve safety.

[0025] The effects that can be obtained in the exemplary embodiments of this disclosure are not limited to those described above, and those skilled in the art can derive and understand other effects not mentioned in the following description. In other words, those skilled in the art can also derive unintended effects from the exemplary embodiments of this disclosure. Attached Figure Description

[0026] Figure 1 This is a top view showing a battery pack according to an exemplary embodiment.

[0027] Figure 2 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0028] Figure 3 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0029] Figure 4 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0030] Figure 5 This is a cross-sectional view showing a battery pack according to an exemplary embodiment. Detailed Implementation

[0031] In the following description, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings, but should be interpreted as conforming to the meaning and concept of the technical concept of this disclosure, based on the inventors' ability to appropriately define the concepts of the terms in order to best describe the principles of their own invention.

[0032] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the accompanying drawings are only one of the most preferred embodiments of this disclosure and do not represent all the technical concepts of this disclosure. Therefore, various equivalents and variations that can replace them may exist in this application.

[0033] In addition, when describing this disclosure, detailed descriptions of relevant known configurations or functions will be omitted if it is determined that such detailed descriptions may obscure the main points of this disclosure.

[0034] The embodiments of this disclosure are provided to describe the disclosure more fully to those skilled in the art; therefore, for clarity, the shapes and dimensions of the components in the drawings may be shown enlarged, omitted, or schematically. Consequently, the dimensions or proportions of the individual components do not perfectly reflect the actual dimensions or proportions.

[0035] (First embodiment)

[0036] Figure 1 This is a top view showing a battery pack 100 according to an exemplary embodiment. Figure 2 and Figure 3 This is a cross-sectional view showing a battery pack 100 according to an exemplary embodiment. Figure 2 It shows along Figure 1 A-A' sectional view. Figure 3 It shows along Figure 1 A sectional view of B-B'. In Figure 1 In the middle, the following was omitted. Figure 2 and Figure 3 The diagram shows bolts 131 and 132.

[0037] Reference Figures 1 to 3 The battery pack 100 may include a battery pack housing 110 and battery cell assemblies 120_1 and 120_2. The battery pack 100 may be the final form of a battery system mounted on a mobile body or the like.

[0038] The battery pack housing 110 can provide space for arranging multiple battery cell assemblies 120_1, 120_2. The battery pack housing 110 may include a base plate 111, a central beam 112, crossbeams 113A, 113B, and sidewalls 114A, 114B, 114C, 114D.

[0039] Two directions substantially parallel to the mounting surface 111M of the base plate 111 are defined as the X direction and the Y direction, and a direction substantially perpendicular to the mounting surface 111M of the base plate 111 is defined as the Z direction. Each of the X, Y, and Z directions may be substantially perpendicular to each other. Unless otherwise stated, the definitions of directions are the same for the following figures.

[0040] The intermediate beam 112 may be located on the base plate 111. According to an exemplary embodiment, the intermediate beam 112 may protrude from the mounting surface 111M of the base plate 111. The intermediate beam 112 may extend in the X-axis direction. The intermediate beam 112 may separate the battery cell assemblies 120_1 and 120_2 in the Y direction.

[0041] Crossbeams 113A and 113B can be located on the base plate 111. Each of crossbeams 113A and 113B can intersect with the intermediate beam 112. Each of crossbeams 113A and 113B can extend in the Y direction. Each of crossbeams 113A and 113B can separate the battery cell assemblies 120_1 and 120_2 in the X direction.

[0042] Sidewalls 114A, 114B, 114C, and 114D can be connected to the base plate 111 and can be generally perpendicular to the base plate 111. Sidewalls 114A, 114B, 114C, and 114D can extend along the edge of the base plate 111. Sidewalls 114A, 114B, 114C, and 114D can surround the intermediate beam 112, the crossbeams 113A and 113B, and the battery cell assemblies 120_1 and 120_2. Each of sidewalls 114A and 114C can be generally parallel to the intermediate beam 112. Each of sidewalls 114A and 114C can be generally perpendicular to each of the crossbeams 113A and 113B. Each of sidewalls 114B and 114D can be generally perpendicular to the intermediate beam 112. Each of the sidewalls 114B and 114D may be substantially parallel to each of the crossbeams 113A and 113B.

[0043] Each of the crossbeams 113A and 113B can be joined to the battery pack housing 110 via adhesive layers 141 and 142 and weld layer 151.

[0044] Each of the crossbeams 113A and 113B can be bonded to the base plate 111 via an adhesive layer 141. The adhesive layer 141 can be interposed between the base plate 111 and each of the crossbeams 113A and 113B. The adhesive layer 141 can contact the mounting surface 111M of the base plate 111. The adhesive layer 141 can contact the surface 113S1 of each of the crossbeams 113A and 113B. The adhesive layer 141 may comprise at least one of epoxy resin, polyurethane, acrylic resin, and silicone resin, but the type of adhesive layer 141 is not limited to these.

[0045] Each of the crossbeams 113A and 113B can be joined to the intermediate beam 112 via an adhesive layer 142. The adhesive layer 142 can be inserted between the intermediate beam 112 and each of the crossbeams 113A and 113B. The adhesive layer 142 can contact the upper surface of the intermediate beam 112. The adhesive layer 142 can contact the surface 113S2 of each of the crossbeams 113A and 113B. Although Figure 2An embodiment is shown in which the adhesive layer 142 contacts the upper surface of the intermediate beam 112, but the present disclosure is not limited thereto, and the adhesive layer 142 may extend to contact the upper surface and both sides of the intermediate beam 112. The adhesive layer 142 may comprise at least one of epoxy resin, polyurethane, acrylic resin and silicone resin, but the type of adhesive layer 142 is not limited thereto.

[0046] Each of the crossbeams 113A and 113B can be joined to the intermediate beam 112 by bolts 132. Bolts 132 can be configured to pass through each of the crossbeams 113A and 113B and the adhesive layer 142 to fasten each of the crossbeams 113A and 113B to the intermediate beam 112. Bolts 132 can be spaced apart from the cooling channel 115 in the Z direction.

[0047] Each of the crossbeams 113A and 113B can be joined to the sidewalls 114A and 114C via a weld layer 151. The weld layer 151 can be inserted between each of the crossbeams 113A and 113B and the sidewall 114A. The weld layer 151 can be inserted between each of the crossbeams 113A and 113B and the sidewall 114C. The weld layer 151 can contact the side surface 113S3 of each of the crossbeams 113A and 113B. The weld layer 151 can contact the inner surface of the sidewall 114A. The weld layer 151 can contact the inner surface of the sidewall 114C. The weld layer 151 can be formed by any of the following methods: metal inert gas (MIG) welding, resistance welding, laser welding, and ultrasonic welding. However, the method of forming the weld layer 151 is not limited to these methods.

[0048] Cooling channels 115 may be located below battery cell assemblies 120_1 and 120_2. Cooling channels 115 may overlap with battery cell assemblies 120_1 and 120_2 in the Z direction. According to an exemplary embodiment, cooling channels 115 may be embedded in a base plate 111. Cooling channels 115 provide channels for the flow of a coolant, such as water. Coolant flowing through cooling channels 115 may absorb heat generated from battery cell assemblies 120_1 and 120_2 to cool them.

[0049] Each of the battery cell assemblies 120_1 and 120_2 may include a battery cell 121C, a separator 121S, and side beams 122A and 122B. According to an exemplary embodiment, each of the battery cell assemblies 120_1 and 120_2 may not include a module frame.

[0050] A plurality of battery cells 121C and a plurality of separators 121S can form a battery cell stack 121. According to an exemplary embodiment, each of the plurality of battery cells 121C can be a bidirectional battery cell. That is, the positive terminal of the plurality of battery cells 121C can be disposed at one end of each cell, and the negative terminal of the plurality of battery cells 121C can be disposed at the other end of each cell. Those skilled in the art will be able to readily implement embodiments in which each of the plurality of battery cells 121C is a unidirectional battery cell based on the content described herein.

[0051] Each of the multiple battery cells 121C may include an electrode assembly, an electrolyte, and a housing covering them. The housing may be any of a pouch housing, a cylindrical housing, and a rectangular housing. The pouch housing may include an aluminum laminate. The rectangular and cylindrical housings may contain a metallic material, such as aluminum. The rectangular housing may have a cuboid shape. The cylindrical housing may have a cylindrical shape.

[0052] An electrode assembly embedded in a housing may include a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. Depending on the assembly configuration, the electrode assembly may be either a wound type or a stacked type. A wound electrode assembly may include a wound structure comprising a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. A stacked electrode assembly includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators inserted therebetween, stacked sequentially. According to an exemplary embodiment, a plurality of battery cells 121C connected in parallel may constitute a plurality of banks, and the plurality of banks may be connected in series. The output current of each of the battery cell assemblies 120_1 and 120_2 can be determined based on the number of battery cells 121C included in each of the plurality of banks. The output voltage of each of the battery cell assemblies 120_1 and 120_2 can be determined based on the number of the plurality of banks connected in series with each other.

[0053] Multiple separators 121S can be inserted between multiple battery cells 121C. The multiple separators 121S can contain compressible material. The multiple separators 121S can absorb the expansion of the multiple battery cells 121C.

[0054] According to an exemplary embodiment, the plurality of partitions 121S may be thermal barriers. According to an exemplary embodiment, each of the plurality of partitions 121S may have a high melting temperature and low thermal conductivity. According to an exemplary embodiment, each of the plurality of partitions 121S may comprise a flame-retardant material, such as ceramic or coated glass. According to an exemplary embodiment, the plurality of partitions 121S may be configured to release fire-retarding material and fire extinguishing agent in the event of a thermal runaway event.

[0055] In this example, battery cell modules 120_1 and 120_2 are arranged in 2 rows and 2 columns. Therefore, battery cell modules 120_1 and 120_2 can be referred to as being arranged as Those skilled in the art will be able to readily obtain, based on the content described herein, information including... The battery pack consists of battery cells 120_1 and 120_2. Here, each of M and N is an arbitrary integer greater than 2.

[0056] Side beams 122A and 122B can be located on two sides of the battery cell stack 121 in the X direction. Side beams 122A and 122B can be fixed to the battery cell stack 121 using adhesive materials or the like. Side beams 122A and 122B can be spaced apart from each other, with the battery cell stack 121 located between them. Side beams 122A and 122B can overlap with the battery cell 121C and separator 121S in the X direction.

[0057] Each of the side beams 122A and 122B may have a shape symmetrical with respect to the battery cell stack 121. Shape. The side beam 122A of battery cell assembly 120_1 may have a shape complementary to the side wall 114D. The side beam 122B of battery cell assembly 120_1 may have a shape complementary to the crossbeam 113A. The side beam 122A of battery cell assembly 120_2 may have a shape complementary to the crossbeam 113A. The side beam 122B of battery cell assembly 120_2 may have a shape complementary to the crossbeam 113B. According to an exemplary embodiment, each of the side beams 122A and 122B may be manufactured by extrusion.

[0058] Side beams 122A and 122B can be fastened to the battery pack housing 110 by bolts 131. Each of side beams 122A and 122B may include multiple recesses 122R. Each bolt 131 can be accommodated in each recess 122R. Bolts 131 can pass through side beams 122A and 122B to fasten side beams 122A and 122B to crossbeams 113A and 113B or sidewalls 114D. Side beam 122A of battery cell assembly 120_1 can be fastened to sidewall 114D. Side beam 122B of battery cell assembly 120_1 can be fastened to crossbeam 113A. Side beam 122A of battery cell assembly 120_2 can be fastened to crossbeam 113A. Side beam 122B of battery cell assembly 120_2 can be fastened to crossbeam 113B. Bolts 131 can be spaced apart from the base plate 111 in the Z direction. Bolt 131 may be spaced apart from cooling channel 115 in the Z direction.

[0059] The side beam 122B of battery cell assembly 120_1 may face the side beam 122A of battery cell assembly 120_2. The side beam 122B of battery cell assembly 120_1 may be spaced apart from the side beam 122A of battery cell assembly 120_2 in the X direction.

[0060] According to an exemplary embodiment, in each of the battery cell assemblies 120_1 and 120_2, a plurality of recesses 122R of the side beam 122A can face in the opposite direction to the plurality of recesses 122R of the side beam 122B, with reference to the battery cell stack 121. According to an exemplary embodiment, each of the plurality of recesses 122R of the side beam 122B of the battery cell assembly 120_1 can face each of the plurality of recesses 122R of the side beam 122A of the battery cell assembly 120_2. According to an exemplary embodiment, each of the plurality of recesses 122R of the side beam 122B of the battery cell assembly 120_1 can be aligned in the X direction with each of the plurality of recesses 122R of the side beam 122A of the battery cell assembly 120_2.

[0061] The width of beam 113A in the X direction may be greater than the width of beam 113B in the X direction. The width of beam 113A in the X direction may be greater than the width of sidewall 114D in the X direction. According to an exemplary embodiment, the width of beam 113B in the X direction may be substantially the same as the width of sidewall 114D in the X direction.

[0062] The height of each of the crossbeams 113A and 113B in the Z direction may be approximately the same as the height of the side wall 114D. The height of each of the crossbeams 113A and 113B in the Z direction may be less than the height of each of the side walls 114A, 114B, and 114C in the Z direction. The height of the side wall 114D in the Z direction may be less than the height of each of the side walls 114A, 114B, and 114C in the Z direction.

[0063] The height of each of the side beams 122A and 122B in the Z direction may be substantially the same as the height of each of the side walls 114A, 114B, and 114C in the Z direction. The height of each of the side beams 122A and 122B in the Z direction may be greater than the height of the side wall 114D in the Z direction. The height of each of the side beams 122A and 122B in the Z direction may be greater than the height of each of the cross beams 113A and 113B in the Z direction.

[0064] The height of the battery cell stack 121 in the Z direction can be greater than the height of each of the crossbeams 113A and 113B in the Z direction. The height of the battery cell stack 121 in the Z direction can be greater than the height of the side wall 114D in the Z direction. The height of the battery cell stack 121 in the Z direction can be less than the height of each of the side beams 122A and 122B in the Z direction. The height of the battery cell stack 121 in the Z direction can be less than the height of the side walls 114A, 114B, and 114C in the Z direction.

[0065] The battery pack 100 can be manufactured by joining crossbeams 113A and 113B to the battery pack housing 110, and then joining battery cell assemblies 120_1 and 120_2 to the crossbeams 113A and 113B.

[0066] According to an exemplary embodiment, adhesive layer 141 may be applied to surface 113S1 of each of the crossbeams 113A, 113B, and adhesive layer 142 may be applied to surface 113S2 to bond each of the crossbeams 113A, 113B to the battery pack housing 110. Thereafter, a weld layer 151 may be formed in the gap between each of the crossbeams 113A, 113B and the sidewalls 114A, 114C using MIG welding or the like. Additionally, each of the crossbeams 113A, 113B may be fastened to the intermediate beam 112 using bolts 132. After each of the battery cell assemblies 120_1, 120_2 is installed within the battery pack housing 110, the side beams 122A, 122B of each of the battery cell assemblies 120_1, 120_2 may be bolted to the battery pack housing 110 using bolts 131.

[0067] In other words, each of the crossbeams 113A and 113B can be joined to the battery pack housing 110 via adhesive layers 141 and 142, weld layer 151, and bolts 132. Each of the side beams 122A and 122B can be joined to each of the crossbeams 113A and 113B joined to the battery pack housing 110, as well as to the side wall 114D, via bolts 131. Therefore, even if each bolt 131 is not directly fastened to the base plate 111, the side beams 122A and 122B can still be secured to the battery pack housing 110.

[0068] Since the bolts 131 are spaced apart from the base plate 111 in the Z direction, the constraints on the shape of the cooling channel 115 of the base plate 111 can be reduced. As a result, the cooling channel 115 can be expanded to improve the cooling performance of the battery pack 100.

[0069] Furthermore, since each of the crossbeams 113A and 113B is joined to the sidewalls 114A and 114C via a weld layer 151, the battery pack 100 may not require side bolts to fasten the crossbeams 113A and 113B to the sidewalls 114A and 114C. Therefore, even if vibration or impact is applied to the battery pack 100 in the Z direction, the problem of the side bolts being damaged by shear forces can be prevented. Additionally, since the assembly process due to the tightening of the side bolts is eliminated, the efficiency of the assembly process can be improved.

[0070] (Second Embodiment)

[0071] Figure 4 This is a cross-sectional view showing a battery pack 100' according to an exemplary embodiment. Figure 4 It shows along Figure 1 The cross section of A-A'.

[0072] exist Figure 4 In, it has the same Figures 1 to 3 Components with the same reference numerals as those in the accompanying drawings can be described using the methods described in the first embodiment above, and identical descriptions will be omitted. Hereinafter, the components of the second embodiment that differ from those in the first embodiment will be described primarily.

[0073] Reference Figure 1 and Figure 4 The battery pack 100' may include a weld layer 152 located between the intermediate beam 112 and each of the crossbeams 113A and 113B. The weld layer 152 may contact surfaces 113S2 and 113S3 of each of the crossbeams 113A and 113B. The weld layer 152 may contact the upper surface and two sides of the intermediate beam 112. The battery pack 100' may include the weld layer 152 and may not include bolts for fastening the intermediate beam 112 to each of the crossbeams 113A and 113B. Figure 2 (132 in the middle).

[0074] The battery pack 100' can be manufactured by joining crossbeams 113A and 113B to the battery pack housing 110, and then joining battery cell assemblies 120_1 and 120_2 to the crossbeams 113A and 113B.

[0075] According to an exemplary embodiment, an adhesive layer 141 may be applied to the surface 113S1 of each of the crossbeams 113A and 113B to bond each of the crossbeams 113A and 113B to the battery pack housing 110. Thereafter, a weld layer 151 may be formed in the gap between each of the crossbeams 113A and 113B and the sidewalls 114A and 114C using MIG welding or the like. Additionally, a weld layer 152 may be formed in the gap between each of the crossbeams 113A and 113B and the intermediate beam 112 using MIG welding or the like. After each of the battery cell assemblies 120_1 and 120_2 is installed within the battery pack housing 110, each of the sidebeams 122A and 122B of each of the battery cell assemblies 120_1 and 120_2 may be bolted to the crossbeams 113A and 113B and the sidewall 114D using bolts 131. However, the manufacturing method and sequence of the battery pack 100' are not limited to the methods and sequences described above, and various changes can be made.

[0076] (Third embodiment)

[0077] Figure 5 This is a cross-sectional view showing the battery pack 100 according to an exemplary embodiment. Figure 5 It shows along Figure 1 The cross section of A-A'.

[0078] exist Figure 5 In, it has the same Figures 1 to 3 Components with the same reference numerals as those in the accompanying drawings can be described using the above description in the first embodiment, and identical descriptions will be omitted. Hereinafter, the components of the third embodiment that differ from those in the first embodiment will be described primarily.

[0079] Reference Figure 1 and Figure 5 The battery pack 100” may further include a weld layer 152 located between the intermediate beam 112 and each of the crossbeams 113A, 113B. The weld layer 152 may contact surfaces 113S2, 113S3 of each of the crossbeams 113A, 113B. The weld layer 152 may contact the upper surface and two sides of the intermediate beam 112. The battery pack 100” may include the weld layer 152 and may not include bolts for fastening the intermediate beam 112 to each of the crossbeams 113A, 113B. Figure 2 (132 in the middle).

[0080] Each of the crossbeams 113A and 113B can be joined to the base plate 111 by an adhesive pattern 141' and a welding pattern 153. The adhesive pattern 141' and the welding pattern 153 can be inserted between the base plate 111 and each of the crossbeams 113A and 113B.

[0081] The adhesive patterns 141' may be spaced apart from each other in the Y direction. According to an exemplary embodiment, the adhesive patterns 141' may be arranged at equal intervals. The welding patterns 153 may be spaced apart from each other in the Y direction. According to an exemplary embodiment, the welding patterns 153 may be arranged at equal intervals. The adhesive patterns 141' and welding patterns 153 may be arranged alternately in the Y direction.

[0082] The adhesive pattern 141' and the welding pattern 153 can contact the mounting surface 111M of the base plate 111. The adhesive pattern 141' and the welding pattern 153 can contact the surface 113S1 of each of the crossbeams 113A and 113B.

[0083] According to an exemplary embodiment, an adhesive pattern 141' may be applied to the surface 113S1 of each of the crossbeams 113A and 113B to bond each of the crossbeams 113A and 113B to the battery pack housing 110. Thereafter, a weld layer 151 may be formed in the gap between each of the crossbeams 113A and 113B and the sidewalls 114A and 114C using MIG welding or the like. A weld layer 152 may be formed in the gap between each of the crossbeams 113A and 113B and the intermediate beam 112 using MIG welding or the like. A weld pattern 153 may be formed in the gap between each of the crossbeams 113A and 113B and the base plate 111 using MIG welding or the like. After each of the battery cell assemblies 120_1 and 120_2 is installed within the battery pack housing 110, each of the side beams 122A and 122B of each of the battery cell assemblies 120_1 and 120_2 can be bolted to the crossbeams 113A and 113B and the side wall 114D using bolts 131. However, the manufacturing method and sequence of the battery pack 100” are not limited to the methods and sequences described above, and various changes can be made.

[0084] As described above, this disclosure has been described in more detail with reference to the accompanying drawings and embodiments. However, it should be understood that the configurations described in the drawings or the embodiments described in this specification are merely one embodiment of this disclosure and do not represent all the technical concepts of this disclosure. Therefore, various equivalents and modifications that can replace these technical concepts at the time of filing this application are possible.

Claims

1. A battery pack, comprising: A battery pack housing, the battery pack housing including a base plate, a central beam extending in a first direction on the base plate, and a crossbeam intersecting the central beam and extending in a second direction perpendicular to the first direction on the base plate; A battery cell assembly, wherein the battery cell assembly is located on the substrate; as well as A first adhesive layer is located between the crossbeam and the base plate.

2. The battery pack according to claim 1, wherein, The battery cell assembly also includes: A battery cell stack, the battery cell stack comprising a plurality of battery cells arranged in the first direction; and Side beams, the side beams being located on the side of the battery cell stack in the first direction, and The battery pack also includes bolts for fastening the side beam to the crossbeam.

3. The battery pack according to claim 2, wherein, Each of the bolts is spaced apart from the base plate in a third direction perpendicular to the first direction and the second direction, respectively.

4. The battery pack according to claim 2, wherein, The side beam includes a plurality of recesses, each accommodating one of the bolts.

5. The battery pack according to claim 1, further comprising bolts for fastening the crossbeam to the intermediate beam.

6. The battery pack according to claim 1, further comprising a second adhesive layer located between the intermediate beam and the crossbeam.

7. The battery pack according to claim 1, wherein, The battery pack housing also includes multiple sidewalls on the base plate parallel to the intermediate beam; and The battery pack also includes a welded layer located between each of the plurality of sidewalls and the crossbeam.

8. The battery pack according to claim 1, further comprising a welded layer located between the intermediate beam and the crossbeam.

9. The battery pack according to claim 1, wherein, The first adhesive layer includes a plurality of adhesive patterns spaced apart in the second direction. The battery pack further includes a plurality of welding patterns spaced apart in the second direction between the crossbeam and the base plate, and The adhesive pattern and the welding pattern are arranged alternately.

10. A battery pack, comprising: A base plate, the base plate including cooling channels; An intermediate beam that extends in a first direction on the base plate; A crossbeam, the crossbeam being on the base plate, the crossbeam intersecting the intermediate beam and extending in a second direction perpendicular to the first direction; A battery cell assembly, located on the substrate, comprising a battery cell stack having a plurality of battery cells arranged in a first direction and a side beam located on a side of the battery cell stack in the first direction; and The first bolt secures the side beam to the cross beam. Each of the first bolts is spaced apart from the cooling channel in a third direction perpendicular to the first and second directions.

11. The battery pack of claim 10, further comprising an adhesive layer located between the substrate and the crossbeam.

12. The battery pack of claim 10, further comprising an adhesive layer located between the intermediate beam and the crossbeam.

13. The battery pack of claim 10, further comprising a welded layer located between the intermediate beam and the crossbeam.

14. The battery pack according to claim 10, further comprising: Sidewalls, which are perpendicular to the base plate and the crossbeam respectively; as well as A welded layer, which is located between the crossbeam and the sidewall.

15. The battery pack according to claim 10, wherein, The side beam includes a plurality of recesses that accommodate each of the first bolts.

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