Battery pack

Abstract

A battery pack according to an embodiment of the present invention may include a first battery module including a plurality of battery cells, a first side bracket provided on a side plate of the first battery module, a second battery module stacked on the first battery module and including a plurality of battery cells, a second side bracket provided on a side plate of the second battery module, and a mounting bracket fastened to the first side bracket and the second side bracket.

Description

[Technical field]

[0001] The present invention relates to a battery pack.

[0002] This application claims priority to Korean Patent Application No. 10-2022-0183776 filed on December 23, 2022 and Korean Patent Application No. 10-2023-0077598 filed on June 16, 2023, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings. [Background technology]

[0003] 2. Description of the Related Art As the demand for portable electronic products such as laptops, video cameras, and mobile phones has increased dramatically and robots, electric vehicles, and other such products have come into full swing for commercialization, active research has been conducted into high-performance secondary batteries that can be repeatedly charged and discharged.

[0004] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Of these, lithium secondary batteries are attracting attention for their advantages over nickel-based secondary batteries, such as the fact that they have almost no memory effect and can be freely charged and discharged, as well as their extremely low self-discharge rate and high energy density.

[0005] Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively, and includes an electrode assembly in which a positive electrode plate and a negative electrode plate, to which such a positive electrode active material and a negative electrode active material are applied, are arranged with a separator sandwiched therebetween, and an exterior material, such as a battery case, in which the electrode assembly is enclosed together with an electrolyte.

[0006] In general, lithium secondary batteries can be broadly classified into can-type secondary batteries, in which the electrode assembly is housed in a metal can, and pouch-type secondary batteries, in which the electrode assembly is housed in a pouch made of an aluminum laminate sheet, depending on the shape of the exterior material.

[0007] Recently, secondary batteries are widely used for driving and storing energy not only in small devices such as portable electronic devices but also in medium- to large-sized devices such as electric vehicles and energy storage systems (ESS). A battery module can be configured by housing a plurality of such secondary batteries together inside a module case in an electrically connected state. A battery pack can be configured by connecting a plurality of such battery modules.

[0008] Such battery packs are often limited in the size of the installation space. For example, when the battery pack is installed in a vehicle, there may be a relatively large space restriction in the vertical direction. Therefore, it is necessary to attempt to increase the energy density in the vertical direction by arranging a fastening structure in the left-right direction or the front-rear direction of the battery pack. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention is directed to solving these and other problems.

[0010] Another object of the present invention is to provide a battery pack capable of increasing energy density in the vertical direction.

[0011] It is still another object of the present invention to provide a battery pack including a structure capable of fixing a stack of battery modules in the left-right or front-rear direction.

[0012] It is yet another object of the present invention to provide a battery pack capable of improving space efficiency. [Means for solving the problem]

[0013] To achieve the above objective, a battery pack according to one embodiment of the present invention may include a first battery module having a plurality of battery cells, a first side bracket provided on a side plate of the first battery module, a second battery module stacked on the first battery module and having a plurality of battery cells, a second side bracket provided on a side plate of the second battery module, and a mounting bracket fastened to the first side bracket and the second side bracket.

[0014] In addition, each of the first battery module and the second battery module may include a plurality of cylindrical battery cells extending in a vertical direction.

[0015] Additionally, the first side bracket may be attached to a side plate of the first battery module.

[0016] The first side bracket may also include a nut secured to an inner surface.

[0017] In addition, a side plate of the first battery module may include a receiving portion that receives the nut.

[0018] The battery pack may further include a first fastening member that passes through the mounting bracket and is fastened to the nut.

[0019] The battery pack may further include a middle bracket disposed between the first battery module and the second battery module and covering the second side bracket, and a second fastening member penetrating the middle bracket and the mounting bracket.

[0020] The battery pack may further include a bottom bracket covering a lower surface of the first battery module and the first side bracket, and a third fastening member penetrating the bottom bracket and the mount bracket.

[0021] The battery pack may further include a top bracket covering an upper surface of the second battery module, and the mounting bracket may be fastened to the top bracket.

[0022] The battery pack may further include a front bracket covering a front surface of the first battery module and a front surface of the second battery module, and the mounting bracket may be fastened to the front bracket.

[0023] In order to achieve the above object, an automobile according to one embodiment of the present invention includes a battery pack according to the present invention. Effect of the Invention

[0024] According to at least one of the embodiments of the present invention, a battery pack capable of increasing the energy density in the vertical direction can be provided.

[0025] According to at least one embodiment of the present invention, a battery pack can be provided that includes a structure capable of fixing a stack of battery modules in the left-right direction or the front-rear direction.

[0026] According to at least one embodiment of the present invention, a battery pack capable of improving space efficiency can be provided.

[0027] The drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and serve to facilitate a further understanding of the technical ideas of the present invention as well as the content of the invention, and therefore the present invention should not be interpreted as being limited to only the matters depicted in the drawings. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 illustrates a battery pack according to one embodiment of the present invention. [Diagram 2]2 is a diagram showing an isolated configuration of a portion of the battery pack in FIG. 1. [Diagram 3] 2 is a diagram illustrating an isolated configuration of a portion of a battery module constituting a battery pack according to an embodiment of the present invention. FIG. [Figure 4] FIG. 2 is a diagram showing a stack of multiple battery modules constituting a battery pack according to one embodiment of the present invention. [Diagram 5] 2 is a diagram showing a plurality of battery modules, a top bracket, and a bottom bracket that constitute a battery pack according to an embodiment of the present invention, in a separated state. FIG. [Figure 6] 2 is a diagram showing a plurality of battery modules, a mounting bracket, and a reinforcing bracket that constitute a battery pack according to an embodiment of the present invention, in a separated state. FIG. [Figure 7] 4A to 4C are views showing fastening members for fastening a plurality of battery modules, a mounting bracket, and a reinforcing bracket which constitute a battery pack according to an embodiment of the present invention. [Figure 8] 2 is a diagram showing a plurality of battery modules, a front bracket, and a rear bracket, which constitute a battery pack according to an embodiment of the present invention, in a separated state. FIG. [Figure 9] 2 is a diagram showing a part of a cross-sectional configuration taken along the line AA' in FIG. 1. [Figure 10] FIG. 10 is an enlarged view of part F in FIG. [Figure 11] 2 is a diagram showing a part of a cross-sectional configuration taken along line BB' in FIG. 1. [Figure 12] FIG. 12 is an enlarged view of part G in FIG. [Figure 13] FIG. 12 is an enlarged view of part H in FIG. [Figure 14] FIG. 2 is an enlarged view of part C in FIG. [Figure 15] FIG. 2 is an enlarged view of part D in FIG. [Figure 16] FIG. 2 is an enlarged view of part E in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms and words used in the present specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, but are to be construed as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor can appropriately define the concepts of terms himself / herself in order to best describe the invention.

[0030] Therefore, it should be understood that the embodiment described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention and do not represent the entire technical idea of ​​the present invention, and therefore there may be various equivalents and modifications that can be substituted therefor at the time of this application.

[0031] Fig. 1 is a diagram showing a battery pack according to an embodiment of the present invention. Fig. 2 is a diagram showing a partial configuration of the battery pack in Fig. 1 in an isolated state. Referring to Figs. 1 and 2, the battery pack according to an embodiment of the present invention may include a first battery module 100, a first side bracket 120, a second battery module 200, a second side bracket 220, and a mounting bracket 300.

[0032] The first battery module 100 may include a plurality of battery cells 10. In this case, the battery cells 10 may be secondary batteries. Also, the battery cells 10 may be cylindrical battery cells 10. The first battery module 100 may include a module case. The module case may have a rectangular parallelepiped shape. The module case may be composed of a plurality of plates. The module case may form a space therein. The plurality of battery cells 10 may be located inside the module case.

[0033] The first side bracket 120 may be provided on the side plate 110 of the first battery module 100. The first side bracket 120 may be formed in a quadrangular plate shape. The first side bracket 120 may cover the side plate 110 of the first battery module 100. The first side bracket 120 may include a pair of first side brackets. The first side bracket 120 may be provided on each of the pair of side plates 110 of the first battery module 100.

[0034] The second battery module 200 may include a plurality of battery cells 10. In this case, the battery cells 10 may be secondary batteries. Also, the battery cells 10 may be cylindrical battery cells 10. The second battery module 200 may include a module case. The module case may have a rectangular parallelepiped shape. The module case may be composed of a plurality of plates. The module case may form a space therein. The plurality of battery cells 10 may be located inside the module case.

[0035] The second battery module 200 may be stacked on the first battery module 100. For example, the bottom plate of the second battery module 200 may be located above the top plate of the first battery cell 10.

[0036] The second side bracket 220 may be provided on the side plate 210 of the second battery module 200. The second side bracket 220 may be provided on the side plate 210 of the second battery module 200. The second side bracket 220 may be formed in a square plate shape. The second side bracket 220 may cover the side plate 210 of the second battery module 200. The second side bracket 220 may include a pair of second side brackets 220. The second side bracket 220 may be provided on each of the pair of side plates 210 of the second battery module 200.

[0037] The mounting bracket 300 may be fastened to the first side bracket 120 and the second side bracket 220. The mounting bracket 300 may be formed in a square plate shape. The mounting bracket 300 may cover the first side bracket 120 and the second side bracket 220. The mounting bracket 300 may include a pair of mounting brackets 300. Each of the pair of mounting brackets 300 may be fastened to one first side bracket 120 and one second side bracket 220.

[0038] When multiple battery modules are stacked in the vertical or Z-axis direction, a structure for fixing or fastening the multiple battery modules is required. However, due to space restrictions in which the battery pack is installed, it may be difficult to arrange a fixing or fastening structure in the vertical or Z-axis direction.

[0039] According to this configuration of the present invention, the structure for fastening or fixing the first battery module 100 and the second battery module 200 may be configured to be located in the lateral direction or the Y-axis direction. This makes it possible to omit or simplify the structure for fixing in the vertical direction or the Z-axis direction. This makes it possible to improve the energy density of the battery pack in the vertical direction or the Z-axis direction.

[0040] 3 is a diagram showing an isolated configuration of a portion of a battery module constituting a battery pack according to an embodiment of the present invention. Referring to FIG. 3, a first side bracket 120 of a battery pack according to an embodiment of the present invention may be attached to a side plate 110 of a first battery module 100. An adhesive member 130 may be disposed between the first side bracket 120 and the side plate 110. The adhesive member 130 may be disposed to cover the first side bracket 120 or the side plate 110 as a whole.

[0041] Furthermore, the second side bracket 220 of the battery pack according to an embodiment of the present invention may be attached to the side plate 210 of the second battery module 200. An adhesive member 230 may be disposed between the second side bracket 220 and the side plate 210. The adhesive member 230 may be disposed to cover the second side bracket 220 or the side plate 210 as a whole.

[0042] According to this configuration of the present invention, the first side bracket 120 can be coupled to the side plate 110. Since the adhesive member 130 is disposed over a wide area, the coupling strength between the first side bracket 120 and the side plate 110 can be increased.

[0043] 3, the first side bracket 120 of the battery pack according to an embodiment of the present invention may include a nut 121 fixed to an inner surface. The nut 121 may be coupled or fixed to the first side bracket 120 by welding. In this case, the nut 121 may be called a weld nut. A plurality of nuts 121 may be provided. The nuts 121 may be arranged along the front-rear direction or the X-axis direction.

[0044] In addition, the second side bracket 220 of the battery pack according to an embodiment of the present invention may include a nut 221 fixed to an inner surface. The nut 221 may be coupled or fixed to the second side bracket 220 by welding. In this case, the nut 221 may be called a weld nut. A plurality of nuts 221 may be provided. The nuts 221 may be arranged along the front-rear direction or the X-axis direction.

[0045] According to this configuration of the present invention, the nut 121 is coupled to the first side bracket 120 without a separate coupling structure or fixing structure, thereby simplifying the structure of the battery pack and increasing the energy density of the battery pack.

[0046] 3, the side plate 110 of the first battery module 100 of the battery pack according to an embodiment of the present invention may include a receiving portion 111 for receiving a nut 121. The receiving portion 111 may be formed in the side plate 110 of the first battery module 100. The receiving portion 111 may be a hole 111 formed in the side plate 110 of the first battery module 100. A plurality of the receiving portions 111 may be provided. The receiving portions 111 may be provided in one-to-one correspondence with the number of the nuts 121. The receiving portions 111 may be configured to receive the nuts 121 and fastening members to be fastened to the nuts 121.

[0047] Furthermore, the side plate 210 of the second battery module 200 of the battery pack according to an embodiment of the present invention may include a receiving portion 211 that receives the nut 221. The receiving portion 211 may be formed in the side plate 210 of the second battery module 200. The receiving portion 211 may be a hole 211 formed in the side plate 210 of the second battery module 200. A plurality of the receiving portions 211 may be provided. The receiving portions 211 may be provided in one-to-one correspondence with the number of the nuts 221. The receiving portions 211 may be configured to receive the nuts 221 and fastening members fastened to the nuts 221.

[0048] According to this configuration of the present invention, the nuts 121, 221 and fastening members for connecting the side plates 110, 210 and the side brackets 120, 220 are housed inside the battery modules 100, 200, thereby simplifying the structure of the battery pack and increasing the energy density of the battery pack.

[0049] FIG. 4 is a diagram showing a stack of a plurality of battery modules 100, 200 constituting a battery pack according to an embodiment of the present invention. Referring to FIG. 4, the battery pack according to an embodiment of the present invention may include a middle bracket 400. The middle bracket 400 may include a base plate 410 and a side plate 420. The base plate 410 may have a square plate shape. The side plate 420 may extend upward or in the Z-axis direction from the base plate 410. The side plate 420 may have a square plate shape and may be integrally formed. The base plate 410 may be disposed between the first battery module 100 and the second battery module 200. The pair of side plates 420 may cover the second side bracket 220.

[0050] According to this configuration of the present invention, the middle bracket 400 can reinforce the rigidity of the stacked structure of the battery modules 100 and 200. The middle bracket 400 can stably fix the position of the second battery module 200.

[0051] FIG. 5 is a view showing a plurality of battery modules 100, 200, a top bracket 500, and a bottom bracket 600 in a separated state, which constitute a battery pack according to an embodiment of the present invention. FIG. 6 is a view showing a plurality of battery modules 100, 200, a mount bracket 300, and a reinforcing bracket 310 in a separated state, which constitute a battery pack according to an embodiment of the present invention. FIG. 7 is a view showing a fastening member for fastening a plurality of battery modules 100, 200, a mount bracket 300, and a reinforcing bracket 310 in a battery pack according to an embodiment of the present invention. FIG. 8 is a view showing a plurality of battery modules 100, 200, a front bracket 700, and a rear bracket 800 in a separated state, which constitute a battery pack according to an embodiment of the present invention. FIG. 9 is a view showing a part of a cross-sectional configuration taken along a cutting line A-A' in FIG. 1. Referring to FIGS. 5 to 9, the battery pack according to an embodiment of the present invention further includes a top bracket 500 covering an upper surface of the second battery module 200, and the mount bracket 300 can be fastened to the top bracket 500. The top bracket 500 may cover an upper surface of the second battery module 200 and at least a portion of the side plate 210 of the second battery module 200. Alternatively, the top bracket 500 may cover an upper surface of the second battery module 200 and at least a portion of the second side bracket 220.

[0052] According to this configuration of the present invention, by fastening the top bracket 500 to the mount bracket 300, the stacked structure of the first battery module 100 and the second battery module 200 can be stably supported and fixed.

[0053] 5 to 9, the battery pack according to one embodiment of the present invention may further include a bottom bracket 600 covering the underside of the first battery module 100 and the first side bracket 120, and a third fastening member S3 penetrating the bottom bracket 600 and the mounting bracket 300.

[0054] The mounting bracket 300 may be fastened to a bottom bracket 600. The bottom bracket 600 may cover the lower surface of the first battery module 100 and at least a portion of the side plate 110 of the first battery module 100. Alternatively, the bottom bracket 600 may cover the lower surface of the first battery module 100 and at least a portion of the first side bracket 120. The bottom bracket 600 may include a base plate 610 and a side plate 620. The base plate 610 may be located between the first battery module 100 and the second battery module 200. The side plate 620 may cover the side plate 110 or the first side bracket 120 of the first battery module 100.

[0055] According to this configuration of the present invention, by fastening the bottom bracket 600 to the mount bracket 300, the stacked structure of the first battery module 100 and the second battery module 200 can be stably supported and fixed.

[0056] 5 to 9, the battery pack according to an embodiment of the present invention may further include a first fastening member S1 that penetrates the mount bracket 300 and is fastened to the nut 121. A plurality of first fastening members S1 may be provided. The plurality of first fastening members S1 may be arranged in the front-rear direction or the X-axis direction. The plurality of first fastening members S1 may each penetrate the mount bracket 300 and the second side bracket 220. The plurality of first fastening members S1 may each be coupled to the nut 121. In addition, at least a portion of each of the plurality of first fastening members S1 may be inserted into the side plate 210 of the second battery module 200. The plurality of first fastening members S1 may fasten, couple, or fix the mount bracket 300 and the second side bracket 220.

[0057] According to this configuration of the present invention, the second battery module 200 may be coupled, fastened or fixed to the mounting bracket 300 in the left-right or Y-axis direction, thereby improving the energy density and space efficiency of the battery pack in the up-down or Z-axis direction.

[0058] 5 to 9, the battery pack according to an embodiment of the present invention may further include a second fastening member S2 penetrating the middle bracket 400 and the mounting bracket 300.

[0059] A plurality of second fastening members S2 may be provided. The plurality of second fastening members S2 may be arranged in the front-rear direction or the X-axis direction. At least a portion of the plurality of second fastening members S2 may penetrate the mount bracket 300 and the second side bracket 220, respectively. At least a portion of the plurality of second fastening members S2 may penetrate the mount bracket 300 and the first side bracket 120, respectively. The plurality of second fastening members S2 may be coupled to nuts 121, 221, respectively. At least a portion of each of the plurality of second fastening members S2 may be inserted into the side plate 210 of the second battery module 200. At least a portion of each of the plurality of second fastening members S2 may be inserted into the side plate 110 of the first battery module 100, respectively.

[0060] At least a portion of the multiple second fastening members S2 can fasten, couple or fix the mounting bracket 300 and the second side bracket 220. In addition, at least a portion of the multiple second fastening members S2 can fasten, couple or fix the mounting bracket 300 and the first side bracket 120.

[0061] In addition, at least some of the multiple second fastening members S2 may penetrate the middle bracket 400, the mounting bracket 300, and the second side bracket 220. At least some of the multiple second fastening members S2 may fasten, connect, or fix the middle bracket 400, the mounting bracket 300, and the second side bracket 220.

[0062] According to this configuration of the present invention, the first battery module 100 and the second battery module 200 may be coupled, fastened or fixed to the mount bracket 300 in the left-right or Y-axis direction, thereby improving the energy density and space efficiency of the battery pack in the up-down or Z-axis direction.

[0063] 5 to 9, the battery pack according to an embodiment of the present invention may further include a reinforcing bracket 310 provided on the outer side of the mounting bracket 300.

[0064] The reinforcing bracket 310 may be fastened to the mounting bracket 300. The reinforcing bracket 310 may be formed in a square plate shape. The reinforcing bracket 310 may cover the mounting bracket 300. The reinforcing bracket 310 may be provided in a pair. Each of the pair of reinforcing brackets 310 may be fastened to one mounting bracket 300.

[0065] According to this configuration of the present invention, the reinforcing bracket 310 can support the mounting bracket 300. This makes it possible to stably maintain the stacked structure of the battery pack.

[0066] 5 to 9, a battery pack according to an embodiment of the present invention may include a second fastening member S2 penetrating the mounting bracket 300 and the reinforcing bracket 310.

[0067] At least a portion of the multiple second fastening members S2 may pass through the mounting bracket 300 and the reinforcing bracket 310 and be fastened to the nuts 121 of the first side bracket 120.

[0068] At least some of the multiple second fastening members S2 may pass through the mounting bracket 300, the reinforcing bracket 310, and the middle bracket 400, and be fastened to the nuts 221 of the second side bracket 220.

[0069] According to this configuration of the present invention, the first battery module 100 and the second battery module 200 may be coupled, fastened or fixed to the mount bracket 300 in the left-right or Y-axis direction, thereby improving the energy density and space efficiency of the battery pack in the up-down or Z-axis direction.

[0070] 5 to 9, the battery pack according to an embodiment of the present invention may further include a third fastening member S3 penetrating the first side bracket 120 and the mounting bracket 300.

[0071] A plurality of third fastening members S3 may be provided. The plurality of third fastening members S3 may be arranged in the front-rear direction or the X-axis direction. The plurality of third fastening members S3 may each penetrate the mount bracket 300 and the first side bracket 120. The plurality of third fastening members S3 may each be coupled to a nut 121. At least a portion of each of the plurality of third fastening members S3 may be inserted into the side plate 110 of the first battery module 100. At least a portion of each of the plurality of third fastening members S3 may be inserted into the side plate 110 of the first battery module 100.

[0072] The multiple third fastening members S3 can fasten, couple or fix the mounting bracket 300 and the first side bracket 120. In addition, at least a portion of the multiple third fastening members S3 can fasten, couple or fix the mounting bracket 300 and the first side bracket 120.

[0073] According to this configuration of the present invention, the first battery module 100 and the second battery module 200 may be coupled, fastened or fixed to the mount bracket 300 in the left-right or Y-axis direction, thereby improving the energy density and space efficiency of the battery pack in the up-down or Z-axis direction.

[0074] 5 to 9, the first battery module 100 and the second battery module 200 of the battery pack according to an embodiment of the present invention may each include a plurality of cylindrical battery cells 10 extending in a vertical direction. The plurality of cylindrical battery cells 10 may extend in a stacking direction of the first battery module 100 and the second battery module 200.

[0075] According to this configuration of the present invention, the first battery module 100 and the second battery module 200 may be coupled, fastened or fixed to the mount bracket 300 in the left-right or Y-axis direction, thereby improving the energy density and space efficiency of the battery pack in the up-down or Z-axis direction.

[0076] FIG. 10 is an enlarged view of a portion F in FIG. 9. FIG. 11 is a diagram showing a part of a cross-sectional configuration along the section line B-B' in FIG. 1. FIG. 12 is an enlarged view of a portion G in FIG. 11. FIG. 13 is an enlarged view of a portion H in FIG. 11. Referring to FIGS. 10 to 13, at least a portion of the first fastening member S1 and the second fastening member S2 of the battery pack according to an embodiment of the present invention may be inserted into the second battery module 200. In this case, the first fastening member S1 and the second fastening member S2 may be positioned in a space between adjacent battery cells 10.

[0077] In addition, at least a portion of each of the second fastening member S2 and the third fastening member S3 of the battery pack according to an embodiment of the present invention may be inserted into the first battery module 100. In this case, the second fastening member S2 and the third fastening member S3 may be located in a space between adjacent battery cells 10.

[0078] According to this configuration of the present invention, the first fastening member S1, the second fastening member S2, and the third fastening member S3 that fasten the first battery module 100 and the second battery module 200 are positioned in the space between the adjacent battery cells 10, thereby improving space efficiency. As a result, the energy density and space efficiency of the battery pack in the vertical or Z-axis direction can be improved.

[0079] FIG. 14 is an enlarged view of a portion C in FIG. 1. Referring to FIGS. 1 and 14, the battery pack according to an embodiment of the present invention may further include a front bracket 700 covering a front surface of the first battery module 100 and a front surface of the second battery module 200, and the mount bracket 300 may be fastened to the front bracket 700. The front bracket 700 may cover a front surface of the first battery module 100 and a front surface of the second battery module 200. The front bracket 700 may include a first fastening portion 710. The first fastening portion 710 may be provided in a pair. Each of the first fastening portions 710 may be fastened to the mount bracket 300. A fastening member S and a nut N may couple, fasten, or fix the first fastening portion 710 and the mount bracket 300.

[0080] According to this configuration of the present invention, the front bracket 700 can stably support the first battery module 100 and the second battery module 200. As a result, the stacked structure of the battery pack can be stably maintained.

[0081] Fig. 15 is an enlarged view of portion D in Fig. 1. Referring to Figs. 1 and 15, a front bracket 700 of a battery pack according to an embodiment of the present invention may be fastened to a top bracket 500. The front bracket 700 may include a second fastening portion 720. The top bracket 500 may include a fastening portion 510. The second fastening portion 720 may be fastened to the fastening portion 510 of the top bracket 500. A fastening member S and a nut N may couple, fasten, or fix the second fastening portion 720 and the top bracket 500.

[0082] According to this configuration of the present invention, the front bracket 700 can stably support the first battery module 100 and the second battery module 200. As a result, the stacked structure of the battery pack can be stably maintained.

[0083] Fig. 16 is an enlarged view of a portion E in Fig. 1. Referring to Fig. 1 and Fig. 16, a front bracket 700 of a battery pack according to an embodiment of the present invention may be fastened to a bottom bracket 600. The front bracket 700 may include a third fastening portion 730. The bottom bracket 600 may include a fastening portion 611. The third fastening portion 730 may be fastened to the fastening portion 611 of the bottom bracket 600. A fastening member S and a nut N may couple, fasten, or fix the third fastening portion 730 and the bottom bracket 600.

[0084] According to this configuration of the present invention, the front bracket 700 can stably support the first battery module 100 and the second battery module 200. As a result, the stacked structure of the battery pack can be stably maintained.

[0085] An automobile according to the present invention may include the battery pack according to the present invention described above. The battery pack according to the present invention is applicable to automobiles such as electric automobiles and hybrid automobiles. In addition to such a battery pack, the automobile according to the present invention may further include various other components included in the automobile. For example, the automobile according to the present invention may further include a vehicle body, a motor, a control device such as an electronic control unit (ECU), and the like, in addition to the battery pack according to the present invention.

[0086] Meanwhile, in this specification, when terms indicating directions such as up, down, left, right, front, and rear are used, it will be obvious to a person skilled in the art of the present invention that these terms are used merely for convenience of explanation and may vary depending on the position of the object in question, the position of the observer, etc.

[0087] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the scope of the technical concept of the present invention and the scope of the claims.

Claims

1. a first battery module including a plurality of battery cells; a first side bracket provided on a side plate of the first battery module; a second battery module stacked on the first battery module and including a plurality of battery cells; a second side bracket provided on a side plate of the second battery module; a mount bracket fastened to the first side bracket and the second side bracket; Including the battery pack.

2. The first battery module and the second battery module are 10. The battery pack according to claim 1, comprising a plurality of cylindrical battery cells each extending in a vertical direction.

3. The first side bracket is The battery pack of claim 1 , attached to a side plate of the first battery module.

4. The first side bracket is 10. The battery pack of claim 1, further comprising a nut secured to the inner surface.

5. The side plate of the first battery module includes: The battery pack according to claim 4 , further comprising a housing portion that houses the nut.

6. The battery pack according to claim 4 , further comprising a first fastening member passing through the mounting bracket and fastened to the nut.

7. a middle bracket disposed between the first battery module and the second battery module and covering the second side bracket; a second fastening member passing through the middle bracket and the mount bracket; 10. The battery pack of claim 1, further comprising:

8. a bottom bracket covering a lower surface of the first battery module and the first side bracket; a third fastening member passing through the bottom bracket and the mount bracket; 10. The battery pack of claim 1, further comprising:

9. a top bracket for covering an upper surface of the second battery module, The mounting bracket is The battery pack according to claim 1 , fastened to the top bracket.

10. a front bracket covering a front surface of the first battery module and a front surface of the second battery module, The mounting bracket is The battery pack according to claim 1 , which is fastened to the front bracket.

11. A motor vehicle comprising a battery pack according to any one of claims 1 to 10.

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