Battery pack and device including the same

Abstract

A battery pack according to an embodiment of the present disclosure includes: a battery module including a battery cell stack in which a plurality of battery cells including electrode leads are stacked, and a module frame in which the battery cell stack is accommodated; a pack frame accommodating the module frame in a state of accommodating the battery cell stack, and having an open upper portion; a pack cover covering an upper portion of the opening of the pack frame; and a cross member that sets a position of the module frame in a state in which the battery cell stack is accommodated. At least one flange combined with the cross member is arranged on the side face of the module frame.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0068575, filed with the Korean Intellectual Property Office on May 27, 2024, the entire contents of which are incorporated herein by reference.

[0003] This disclosure relates to a battery pack and an apparatus including the battery pack, and more specifically, to a battery pack with improved space utilization and an apparatus including the battery pack. Background Technology

[0004] In modern society, with the daily use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, there is a strong drive for technological development in areas related to these mobile devices. Furthermore, rechargeable / dischargeable secondary batteries are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) in an attempt to address problems such as air pollution caused by existing gasoline vehicles using fossil fuels. Therefore, the need for developing secondary batteries is growing.

[0005] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted much attention due to their advantages. For example, compared to nickel-based batteries, lithium-ion batteries exhibit almost no memory effect, allowing for free charging and discharging, and also have a very low self-discharge rate and high energy density.

[0006] This type of lithium secondary battery typically uses lithium-based oxide and carbon materials as the positive and negative electrode active materials, respectively. A lithium secondary battery includes: an electrode assembly containing a positive electrode plate and a negative electrode plate respectively coated with the positive and negative electrode active materials, with a separator inserted between the positive and negative electrode plates; and a battery casing that seals and houses the electrode assembly and electrolyte.

[0007] Based on the shape of the external materials, lithium secondary batteries can generally be classified into can-type secondary batteries in which the electrode assembly is encapsulated in a metal can and pouch-type batteries in which the electrode assembly is encapsulated in an aluminum laminate.

[0008] In the case of secondary batteries used in small devices, two to three individual battery cells are typically used. However, in the case of secondary batteries used in medium to large devices such as automobiles, battery modules with multiple battery cells electrically connected are used. In such battery modules, multiple battery cells are connected in series or parallel to form battery cell assemblies, thereby increasing capacity and output. Furthermore, one or more battery modules can be installed together with various control and protection systems such as Battery Disconnect Units (BDUs), Battery Management Systems (BMS), and cooling systems to form battery packs.

[0009] Figure 1 This is a perspective view showing a conventional battery pack 10. Figure 2 This is an exploded perspective view of the conventional battery module 1 and battery pack 10. Figure 3 This is a partial perspective view showing the conventional battery module 1 and the battery pack 10. Figure 4 This is a plan view of conventional battery module 1 and battery pack 10.

[0010] The conventional battery pack 10 may include a crossbeam 11 for positioning the battery module 1. The crossbeam 11 can prevent the battery module 1 mounted on the battery pack 10 from detaching.

[0011] However, because the crossbeam 11 occupies space inside the battery pack 10, the space utilization of the battery pack 10 is reduced. This leads to a decrease in the energy density of the battery pack 10. In addition, the mass of the battery pack 10 increases due to the introduction of the crossbeam 11. Summary of the Invention

[0012] Technical issues

[0013] The purpose of this disclosure is to improve the space utilization of a battery pack and reduce its weight and unit cost. Specifically, the purpose of this disclosure is to provide a battery pack and an apparatus including the battery pack that can improve the space utilization of the battery pack and reduce its weight and unit cost by introducing a cross member to replace the existing crossbeam.

[0014] However, the technical objectives to be addressed by the embodiments of this disclosure are not limited to those described above, and various extensions can be made within the scope of the technical concepts included in this disclosure.

[0015] Technical solution

[0016] A battery pack according to one aspect of this disclosure includes: a battery module comprising a battery cell stack therein containing a plurality of battery cells including electrode leads, and a module frame therein housing the battery cell stack; a battery pack frame housing the module frame in a state of housing the battery cell stack, and having an open upper portion; a battery pack cover covering the upper portion of the opening of the battery pack frame; and a transverse member positioning the module frame in the state of housing the battery cell stack. At least one flange is provided on a side of the module frame for engaging with the transverse member.

[0017] The flange may include a fastening hole that engages with the transverse member.

[0018] Transverse members can be strip-shaped members.

[0019] Transverse members may include a joint that engages with a flange.

[0020] Lateral components and flanges can be joined by hooks.

[0021] The transverse component can be parallel to the direction in which the electrode leads protrude.

[0022] The battery pack frame may include: a bottom frame, on which a module frame, in a state of accommodating a stack of battery cells, is disposed; and side frames, which are disposed along the outer periphery of the bottom frame. Lateral members may have mounting portions that attach to the upper ends of the side frames.

[0023] The mounting section can be attached to the battery pack frame using bolts.

[0024] The lateral members can be combined with the battery pack cover.

[0025] Lateral members may include screws that engage with the battery pack cover.

[0026] According to another aspect of this disclosure, an apparatus including the aforementioned battery pack is provided.

[0027] Beneficial effects

[0028] According to specific embodiments of this disclosure, the space utilization of the battery pack can be improved by introducing transverse members that replace existing crossbeams and a modular frame integrated with the transverse members. This allows for a reduction in the weight and unit cost of the battery pack.

[0029] The effects of this disclosure are not limited to those described above, and those skilled in the art will clearly understand, based on the description of the appended claims, other additional effects not mentioned above. Attached Figure Description

[0030] Figure 1 This is a perspective view showing a conventional battery pack.

[0031] Figure 2 It is an exploded perspective view of a conventional battery module and battery pack.

[0032] Figure 3 This is a partial perspective view showing a conventional battery module and battery pack.

[0033] Figure 4 This is a plan view of a conventional battery module and battery pack.

[0034] Figure 5 This is a partial perspective view showing a battery pack according to an embodiment of the present disclosure.

[0035] Figure 6 This is an exploded perspective view showing a battery module according to an embodiment of the present disclosure.

[0036] Figure 7 This is a partial exploded perspective view of a battery module and battery pack according to embodiments of the present disclosure.

[0037] Figure 8 This is a partial perspective view of a battery pack according to an embodiment of the present disclosure.

[0038] Figure 9 This is an exploded perspective view of a battery pack according to an embodiment of the present disclosure.

[0039] Figure 10 This is a perspective view illustrating a module framework according to an embodiment of the present disclosure.

[0040] Figure 11 This is a perspective view showing a transverse member according to an embodiment of the present disclosure.

[0041] Figure 12 yes Figure 11 A magnified view of part of the letter "A".

[0042] Figure 13 This is a partial perspective view showing the transverse members and module frame according to an embodiment of the present disclosure.

[0043] Figure 14 This is an exploded perspective view showing the side frame and transverse members according to an embodiment of the present disclosure. Detailed Implementation

[0044] In the following description, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, to a degree that will be readily practiced by those skilled in the art. The present disclosure may be implemented in various different forms and is not limited to the embodiments described herein.

[0045] For clarity in describing this disclosure, descriptions of components unrelated to the description of this disclosure will be omitted, and throughout the specification, the same or similar components will be indicated by the same reference numerals.

[0046] Because the dimensions and thicknesses of various components are arbitrarily shown in the accompanying drawings for ease of description, this disclosure is not necessarily limited to the dimensions and thicknesses shown. The drawings depict thicknesses at an enlarged scale to clearly show different layers and regions. Furthermore, the drawings exaggerate the thickness of specific layers or regions for ease of description.

[0047] When layers, films, regions, plates, etc., are disposed "on" a specific part, this description includes not only cases where the layers, films, regions, plates, etc., are disposed "directly" on the specific part, but also cases where the layers, films, regions, plates, etc., are disposed on a specific component via another part. When one part is disposed "directly" on another part, this means that there is no new component between the two parts. Furthermore, when a component is disposed "on" a reference part, this means that the component exists on top of or below the reference part, and does not necessarily mean that the component is disposed only on the top of the reference part opposite to the direction of gravity.

[0048] Throughout this description, when a part “includes” a component, unless otherwise defined, this does not mean that the part excludes other components, but rather that the part may include other components.

[0049] Throughout this description, the term "in a plan view" refers to an object viewed from above, and the term "in a sectional view" refers to a vertical section of an object viewed from the side.

[0050] Figure 5 This is a partial perspective view showing a battery pack 1000 according to an embodiment of the present disclosure. Specifically, Figure 5 The battery pack 1000 with the battery module 100 and battery pack cover 1400 removed is shown. Figure 6 This is an exploded perspective view showing a battery module 100 according to an embodiment of the present disclosure. Figure 7 This is a partial exploded perspective view of the battery module 100 and battery pack 1000 according to embodiments of the present disclosure. Figure 8 This is a partial perspective view of a battery pack 1000 according to an embodiment of the present disclosure. Specifically, Figure 8 The image shows battery pack 1000 with battery pack cover 1400 removed. Figure 9 This is an exploded perspective view of a battery pack 1000 according to an embodiment of the present disclosure. Figure 9 A battery pack 1000 including a battery pack cover 1400 is shown.

[0051] Reference Figures 5 to 9According to an embodiment of the present disclosure, a battery pack 1000 includes: a battery module 100, the battery module 100 including a battery cell stack 120 in which a plurality of battery cells 110 including electrode leads 111 are stacked and a module frame 130 therein housing the battery cell stack 120; a battery pack frame 1200, the battery pack frame 1200 housing the module frame 130 in the state of housing the battery cell stack 120 and having an open upper portion; a battery pack cover 1400, the battery pack cover 1400 covering the upper portion of the opening of the battery pack frame 1200; and a transverse member 1100, the transverse member 1100 positioning the module frame 130 in the state of housing the battery cell stack 120.

[0052] The battery module 100 according to this embodiment includes a plurality of battery cells 110. The battery cells 110 according to this embodiment can be various types of battery cells, such as pouch cells, prismatic cells, or cylindrical cells. As an example, such as... Figure 6 As shown, the battery cell according to this embodiment can be a pouch-type battery cell 110. The pouch-type battery cell 110 will be described below, but the battery cell according to this embodiment is not limited to this, and various types of battery cells can be used.

[0053] The battery module 100 can be configured with multiple battery cells 110. As an example, multiple battery cells 110 can be stacked along one direction and electrically connected to each other to form a battery cell stack 120. As an example, multiple battery cells 110 can be erected while being parallel to... Figure 6 The battery cells 110 are stacked along the x-axis. With one surface of the battery cell 110 parallel to the side surface of the module frame 130, the battery cells 110 can be stacked from any side surface of the module frame 130 to another side surface. Therefore, the electrode leads 111 can protrude in a direction perpendicular to the stacking direction of the battery cells 110. In the battery cell 110, one electrode lead 111 can protrude in the +y-axis direction, and another electrode lead 111 can protrude in the -y-axis direction. If the electrode leads 111 of the battery cell protrude in only one direction, then the electrode leads 111 can... Figure 6 It protrudes in the y-axis direction or the -y-axis direction.

[0054] The modular frame 130 according to this embodiment is designed to protect the battery cell stack 120 and the electrical components connected thereto from external physical impacts. The modular frame 130 can accommodate the battery cell stack 120 and the electrical components connected thereto within the internal space of the modular frame 130.

[0055] The module frame 130 can have various shapes. According to this embodiment, the module frame 130 can be a single-frame structure. Here, the single frame can be a metal plate with its upper surface, lower surface, and two sides integrally formed. The single frame can be manufactured by extrusion molding.

[0056] However, the structure of the module frame 130 is not limited to this. As another example, the module frame 130 may have a structure in which a U-shaped frame and a top plate are joined together. In this case, the U-shaped frame can be formed by joining the lower surface of the module frame 130 with the two side surfaces or by making the lower surface of the module frame 130 and the two side surfaces integral. In this case, the individual frames or plates constituting the U-shaped frame can be manufactured by compression molding. Furthermore, in addition to a single frame or a U-shaped frame, the structure of the module frame 130 may be configured as an L-shaped frame, and may also be configured as various structures not described in the above embodiments.

[0057] Module frame 130 can be configured such that the front and rear surfaces are along the length direction ( Figure 6 The opening is in the y-axis direction. Here, the length direction can be the direction in which the electrode lead 111 protrudes from the battery cell 110. The length direction can also be a direction perpendicular to the width direction of the battery cell stack 120. That is, the length direction can be parallel to... Figure 6 The direction of the y-axis, and the width direction can be parallel to it. Figure 6 The direction of the x-axis.

[0058] The battery pack frame 1200 according to this embodiment is designed to protect the battery module 100 and its connected electrical components from external physical impacts. As described later, the battery pack frame 1200 may include a bottom frame 1200b disposed thereon as a module frame 130 in a state of accommodating a stack of battery cells 120, and side frames 1200a disposed along the outer periphery of the bottom frame 1200b. After the battery module 100 is disposed in the internal space of the bottom frame 1200b, the battery pack cover 1400 engages with the edge of the side frame 1200a, thereby sealing the battery pack frame 1200.

[0059] The battery pack frame 1200 may include portions with high thermal conductivity to rapidly dissipate heat generated within the internal space to the outside. For example, at least a portion of the battery pack frame 1200 may be made of a metal with high thermal conductivity, and examples include aluminum, gold, silver, copper, platinum, or alloys containing these metals. Furthermore, the battery pack frame 1200 may partially possess electrical insulating properties, and an insulating film may be provided, or an insulating coating may be applied to locations requiring insulation. The portions of the battery pack frame 1200 to which an insulating film or insulating coating is applied may be referred to as insulating portions.

[0060] According to this embodiment, the battery module 100 can be installed at a position defined by the transverse member 1100. For example, as Figure 8 As shown, the battery modules 100 can be arranged in two rows inside the battery pack frame 1200, and the transverse member 1100 can be disposed across the middle portion of the battery pack frame 1200 to separate the battery modules 100 arranged in two rows. One side of the module frame 130 can be disposed corresponding to one side of the transverse member 1100, and the other side of the module frame 130 can be disposed corresponding to the other side of the transverse member 1100. However, this is an example of the internal structure of the battery pack 1000, and the structure of the battery pack 1000 in this embodiment is not limited to the above example.

[0061] As will be described later, the connection between the lateral member 1100 and the module frame 130 prevents the battery module 100 from separating from the battery pack 1000. Through the connection between the lateral member 1100 and the module frame 130, the battery module 100's position in both the front-rear and left-right directions is minimized. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0062] like Figures 1 to 4 As shown, there is an existing crossbeam 11 (see Figure 3 The crossbeam 11 occupies the space between the battery modules 1. The existing crossbeam 11 can be replaced by the transverse member 1100 according to this embodiment (see [reference]). Figure 3 This minimizes the space between the battery modules 100. Specifically, in order to incorporate the existing crossbeam 11 (see...) Figure 3 ) and battery module 1, the existing crossbeam needs to be along the stacking direction of the battery cells ( Figure 4 The width of the transverse member 1100 (in the x-axis direction) is above a certain level. However, as will be described later, when the transverse member 1100 according to this embodiment is combined with the battery module 100, it may be sufficient for the width of the transverse member 1100 according to this embodiment to be smaller than the width required by the existing crossbeam 1. Furthermore, as Figure 5 , Figure 7 and Figure 8 As shown, in the battery pack 1000 that uses the transverse member 1100 according to this embodiment, compared with the battery pack 100 that uses the existing crossbeam 11 (see...), Figure 3 Unlike existing battery packs 10, the transverse member 1100 and the bottom frame 1200b have a space between them, allowing for a difference in design compared to conventional battery packs 10 (see [link]). Figure 3 Compared to other methods, this can improve space utilization.

[0063] For example, this can be achieved by adding material to the existing crossbeam 11 (see...) Figure 3Energy density can be increased by adding battery cells 110 to the space occupied by the existing beam 11 (see [link]). As another example, energy density can be increased by adding battery cells 110 to the space occupied by the existing beam 11 (see [link]). Figure 3 Cooling performance can be improved by adding cooling components to the space occupied by the existing beam 11 (see [link]). As another example, cooling performance can be improved by adding cooling components to the space occupied by the existing beam 11 (see [link]). Figure 3 Insulating pads are added to the space occupied by the battery module 100 to control the expansion phenomenon.

[0064] Figure 10 This is a perspective view showing a module framework 130 according to an embodiment of the present disclosure.

[0065] Reference Figure 10 According to an embodiment of the present disclosure, at least one flange 131 is provided on the side of the module frame 130 to engage with the transverse member 1100.

[0066] Flange 131 can be in a direction perpendicular to the direction in which the transverse member 1100 extends (in) Figure 10 (in the x-axis direction). That is, the flange 131 can extend and protrude outward from one side of the module frame 130 (in the x-axis direction). Figure 10 The flange 131 may protrude in the +x-axis direction or the -x-axis direction. Specifically, some flanges 131 may protrude in the +x-axis direction from one side of the module frame 130 located in the +x-axis direction, and other flanges 131 may protrude in the -x-axis direction from another side of the module frame 130 located in the -x-axis direction. The number of flanges 131 may be multiple, and the number of flanges 131 may be determined by the bonding force between the flanges 131 and the transverse member 1100, etc.

[0067] Flange 131 is provided on the side of module frame 130, and battery module 100 and transverse member 1100 are connected by flange 131, which can improve the internal space utilization of battery pack 1000.

[0068] Next, refer to Figure 10 According to embodiments of the present disclosure, the flange 131 may include a fastening hole 131a that engages with the transverse member 1100.

[0069] The battery module 100 can be prevented from separating by the engagement between the flange 131 and the transverse member 1100. In other words, the engagement between the flange 131 and the transverse member 1100 minimizes the separation of the battery module 100 in both the front-rear and left-right directions. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0070] The connection between flange 131 and transverse member 1100 can be a hook connection, which will be described later, or in addition to a hook connection, it can be a force-fitting coupling, a bolt connection, or a riveting connection. The connection method between flange 131 and transverse member 1100 can be determined by the required stiffness of battery pack 1000 under conditions such as external vibration or impact.

[0071] exist Figure 10 In the diagram, flange 131 is shown to include two fastening holes 131a, but the shape, size and number of fastening holes 131a can be determined according to the engagement method between flange 131 and transverse member 1100.

[0072] Figure 11 This is a perspective view showing a transverse member 1100 according to an embodiment of the present disclosure.

[0073] Reference Figure 11 According to embodiments of the present disclosure, the transverse member 1100 may be a strip member.

[0074] The transverse member 1100 can be formed as a strip member with a linear shape or a strip member with a curved surface. The thickness, material, length, and width of the transverse member 1100 can be designed based on the dimensions of the battery pack 1000 and the battery module 100, the required stiffness, etc.

[0075] Because the transverse member 1100 is formed as a strip member, it is compatible with the existing crossbeam 11 (see Figure 3 Compared to the battery pack 1000, the weight of the battery pack 1000 can be reduced. Furthermore, the unit price of the battery pack 1000 can be lowered.

[0076] Figure 12 yes Figure 11 A magnified view of part of the letter "A". Figure 13 This is a partial perspective view showing the transverse member 1100 and the module frame 130 according to an embodiment of the present disclosure. Specifically, Figure 13 This is a partial perspective view showing the connection between the transverse member 1100 and the module frame 130.

[0077] Reference Figures 11 to 13 According to embodiments of the present disclosure, the transverse member 1100 may include a joint portion 1100a that engages with the flange 131.

[0078] exist Figure 11 In the middle, the joint 1100a is shown as having a Figure 11The flange 131 has a protruding shape in the +z axis direction, but the shape of the joint 1100a can be determined by the method of joining the transverse member 1100 and the flange 1100. The joint between the flange 131 and the transverse member 1100 can be a hook connection, which will be described later, or it can be a press fit, bolted connection, or riveted connection as described above. If a hook fit is used, the joint 1100a can have a hook shape. If a press fit is used, the joint 1100a can have a shape suitable for forced engagement and connection with the fastening hole 131a of the flange 131. For example, the joint 1100a can have a protruding shape that is forced to engage and connect with the fastening hole 131a. If a bolted connection is used, the joint 1100a can be a hole through which a bolt passes. For example, the flange 131 and the transverse member 1100 can be joined such that a bolt passes through this hole and the fastening hole 131a and is fastened with a nut. The method of joining flange 131 and transverse member 1100 can be determined by the stiffness of battery pack 1000 required by conditions such as external vibration or impact.

[0079] The transverse member 1100 and the flange 131 can be engaged by hooks. Although not shown in the figure, the engagement portion 1100a of the transverse member 1100 may have a hook structure, wherein the hook structure can be detachably engaged with the flange 131. By means of the hook structure, the transverse member 1100 can be fixed to a fixed position on the flange 131 and can be easily assembled and disassembled in a one-touch manner.

[0080] Refer again Figures 6 to 8 According to embodiments of the present disclosure, the lateral member 1100 may be parallel to the direction in which the electrode lead 111 protrudes.

[0081] As described above, the battery cells 110 in the battery module 100 are stacked along one direction, and the lateral member 1100 may be located on one side of the stacking direction of the battery cells 110 relative to the battery module 100. The lateral member 1100 may be in the form of extending along a direction perpendicular to the stacking direction of the battery cells 110. More specifically, as Figure 7 and Figure 8 As shown, with one surface of the bottom frame 1200b perpendicular to the battery pack frame 1200, the battery cell 110 can move along a path parallel to... Figure 6 The components are stacked within the battery module 100 along the x-axis. The lateral member 1100 is located relative to one of the battery modules 100. Figure 8 On one side along the x-axis. The transverse member 1100 can also be along a direction parallel to... Figure 8 The form of the extension along the y-axis.

[0082] The transverse member 1100 is configured to protrude parallel to the direction of the electrode lead 111. Figure 6(in the y-axis direction), which minimizes the bonding force between flange 131 and transverse member 1100. This prevents battery module 100 from separating. Therefore, through the bonding between flange 131 and transverse member 1100, the battery module 100's forces in the front-rear and left-right directions are minimized. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0083] Furthermore, the transverse member 1100 can be configured to protrude parallel to the direction of the electrode lead 111 ( Figure 6 (in the y-axis direction), which allows for improved space utilization and increased energy density within the 1000-cell battery pack.

[0084] Figure 14 This is an exploded perspective view showing the side frame 1200a and the transverse member 1100 according to an embodiment of the present disclosure. Specifically, Figure 14 This is an exploded perspective view showing the connection relationship between the side frame 1200a and the transverse member 1100.

[0085] Reference Figure 7 , Figure 8 , Figure 11 and Figure 14 According to embodiments of the present disclosure, the battery pack frame 1200 may include a bottom frame 1200b disposed thereon as a module frame 130 in a state of accommodating a stack of battery cells 120, and a side frame 1200a disposed along the outer periphery of the bottom frame 1200b. The transverse member 1100 may have a mounting portion 1100c that engages with the upper end of the side frame 1200a.

[0086] The side frame 1200a may extend in a direction perpendicular to one surface of the bottom frame 1200b. An upper interior space with an opening is provided by the bottom frame 1200b and the side frame 1200a, and at least one battery module 100 may be accommodated in such an interior space.

[0087] As will be described later, the mechanical rigidity of the battery pack 1000 can be ensured by the combination between the mounting part 1100c and the battery pack frame 1200 in the event of external vibration or impact on the battery pack 1000.

[0088] Refer again Figure 14 According to an embodiment of the present disclosure, the mounting portion 1100c can be connected to the battery pack frame 1200 by bolts.

[0089] The mounting part 1100c may include a through hole 1100ca, the through hole 1100ca being formed in Figure 14It penetrates along the z-axis. Furthermore, the battery pack frame 1200 may include a battery pack frame fastening hole 1200aa at a position corresponding to the through hole 1100ca. With the through hole 1100ca and the battery pack frame fastening hole 1200aa aligned, the transverse member 1100 can be secured to the battery pack frame 1200 by tightening bolts 1300 passing through the through hole 1100ca and the battery pack frame fastening hole 1200aa. For example, threads may be formed on the inner wall of the battery pack frame fastening hole 1200aa, and the bolt 1300 can be directly engaged with the battery pack frame fastening hole 1200aa.

[0090] The connection between the transverse member 1100 and the battery pack frame 1200 ensures the mechanical stiffness of the battery pack 1000 under external vibrations or impacts, such as those affecting the battery pack 1000. Furthermore, it minimizes the stiffness of the battery module 100 in both the front-rear and left-right directions. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0091] Refer again Figure 9 According to embodiments of the present disclosure, the lateral member 1100 can be coupled to the battery pack cover 1400. For example, the lateral member 1100 may include a protruding shape (not shown) that engages with the battery pack cover, and the battery pack cover 1400 may include an insertion portion (not shown) into which the protruding shape can be inserted at a position corresponding to the protruding shape. The protruding shape is inserted into the insertion portion such that the lateral member 1100 can be coupled to the battery pack cover 1400.

[0092] Furthermore, as another example, a separate nut member (not shown) may be provided on the transverse member 1100. The battery cover 1400 may include a hole (not shown) at a position corresponding to the nut member. With the nut member and the hole of the battery cover 1400 aligned, the transverse member 1100 can be engaged with the battery cover 1400 by tightening bolts (not shown) passing through the holes of the nut member and the battery cover 1400.

[0093] The connection between the transverse member 1100 and the battery pack cover 1400 ensures the mechanical stiffness of the battery pack 1000 under external vibrations or impacts, such as those affecting the battery pack 1000. Furthermore, it minimizes the impact on the battery module 100 in both the front-rear and left-right directions. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0094] Refer again Figure 9 and Figure 12 Another lateral member 1100 according to an embodiment of the present disclosure may include a screw 1100b that engages with the battery pack cover 1400. The screw 1100b may be... Figure 9 It protrudes in the +z axis direction, that is, it protrudes towards the battery pack cover 1400, such as Figure 9 As shown. The battery pack cover 1400 may include holes (not shown) at positions corresponding to screws 1100b. After the screws 1100b pass through the holes, the transverse member 1100 and the battery pack cover 1400 can be joined by tightening nuts to the screws 1100b. For effective securing, the screws 1100b applied to each transverse member 1100 are preferably configured in multiples.

[0095] This combination ensures the mechanical stiffness of the battery pack 1000 under external vibrations or impacts, such as those experienced by the battery pack 1000. Furthermore, it minimizes the stiffness of the battery module 100 in both the front-to-back and left-to-right directions. Figure 8 The movement along the +x-axis, -x-axis, +y-axis, and -y-axis directions allows the battery module 100 to be protected from damage due to external vibrations and impacts.

[0096] According to another aspect of this disclosure, an apparatus including a battery pack 1000 is provided. The battery pack 1000 can be applied to various devices. Specifically, it can be applied to transportation vehicles such as electric bicycles, electric vehicles, and hybrid electric vehicles, or energy storage systems (ESS), and can be applied to various devices capable of using secondary batteries, but is not limited thereto.

[0097] In this embodiment, terms such as front, back, left, right, top, and bottom are used to indicate direction. However, the terms used are provided only for ease of description and may vary depending on the position of the object, the position of the observer, etc.

[0098] Although the present disclosure has been described in detail with reference to preferred embodiments thereof, the scope of the present disclosure is not limited thereto, and those skilled in the art can make various modifications and improvements based on the basic concept of the present disclosure, which are defined in the appended claims and also fall within the scope of the present disclosure.

[0099] [Explanation of reference numerals in the attached figures]

[0100] 100: Battery Module

[0101] 110: Battery cell

[0102] 111: Electrode lead

[0103] 120: Battery cell stack

[0104] 130: Module Framework

[0105] 131: Flange

[0106] 1000: Battery pack

[0107] 1100: Horizontal member

[0108] 1100a: Joint

[0109] 1100b: Screw

[0110] 1100c: Resettlement Department

[0111] 1200: Battery pack frame

[0112] 1200a: Side frame

[0113] 1200b: Bottom frame

[0114] 1300: Bolt

[0115] 1400: Battery pack cover

Claims

1. A battery pack, comprising: A battery module comprising a battery cell stack therein having a plurality of battery cells including electrode leads, and a module frame therein housing the battery cell stack. A battery pack frame that houses the module frame in a state of accommodating the stack of battery cells, and has an open upper portion; A battery pack cover that covers the upper part of the opening in the battery pack frame; as well as A lateral member, positioned within the module frame to accommodate the stack of battery cells. At least one flange is provided on the side of the module frame to engage with the transverse member.

2. The battery pack according to claim 1, wherein, The flange includes a fastening hole that engages with the transverse member.

3. The battery pack according to claim 1, wherein, The transverse member is a strip-shaped member.

4. The battery pack according to claim 1, wherein, The transverse member includes a joint that engages with the flange.

5. The battery pack according to claim 1, wherein, The transverse member and the flange are joined by a hook.

6. The battery pack according to claim 1, wherein, The lateral member is parallel to the direction in which the electrode lead protrudes.

7. The battery pack according to claim 1, wherein, The battery pack frame includes a bottom frame and side frames. The module frame, in a state of accommodating the stack of battery cells, is disposed on the bottom frame, and the side frames are disposed along the outer periphery of the bottom frame. The transverse member has a mounting portion that attaches to the upper end of the side frame.

8. The battery pack according to claim 7, wherein, The mounting section is attached to the battery pack frame by bolts.

9. The battery pack according to claim 1, wherein, The lateral member is combined with the battery pack cover.

10. The battery pack according to claim 1, wherein, The transverse member includes screws that engage with the battery pack cover.

11. An apparatus comprising the battery pack of claim 1.

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