Battery pack and device containing same

Abstract

The present invention includes a battery pack and a device including the same. A battery pack according to one embodiment of the present invention includes at least one battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame that houses the battery cell stack, a first pack frame that mounts the battery modules, a second pack frame that is positioned to cover the battery modules, and a venting portion provided on one surface of the first pack frame, the venting portion being in communication with a venting path formed by a plurality of partition members positioned on the first pack frame.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0158755 filed on November 23, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery pack and a device including the same, and more particularly to a battery pack with improved safety and a device including the same. [Background technology]

[0003] With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. As a result, research into secondary batteries that can meet various requirements is actively being conducted.

[0004] Secondary batteries have been attracting attention not only for use in mobile devices such as mobile phones, digital cameras, and laptop computers, but also as energy sources for power plants such as electric bicycles, electric vehicles, and hybrid electric vehicles.

[0005] In recent years, the use of secondary batteries as an energy storage source has led to an increased need for large-capacity secondary battery structures, and there has been an increasing demand for battery packs with medium to large modular structures that assemble battery modules in which multiple secondary batteries are connected in series or parallel.

[0006] Meanwhile, when a battery pack is constructed by connecting a plurality of battery cells in series / parallel, a battery module consisting of at least one battery cell is generally constructed, and other components are added to the at least one battery module to construct the battery pack. The battery cells constituting such a medium- to large-sized battery module are composed of secondary batteries that can be charged and discharged, and such high-power, large-capacity secondary batteries generate a large amount of heat during the charging and discharging process.

[0007] A battery pack can be formed by connecting a plurality of battery cells in series or parallel. In this case, a battery module consisting of at least one battery cell is generally formed, and other components are added to the at least one battery module to form a battery pack. The battery cells constituting such a medium- to large-sized battery module are composed of secondary batteries that can be charged and discharged. Such high-power, large-capacity secondary batteries generate a large amount of heat during the charging and discharging process, which can cause thermal runaway and potentially generate venting gas or fire inside the battery.

[0008] FIG. 1 is a diagram showing the venting path in a conventional battery pack.

[0009] Referring to Figure 1, a battery pack 10 includes a venting section 15 that discharges venting gases and flames generated inside the battery pack to the outside. However, conventional battery modules have a problem in that venting gases and flames generated in the battery pack move in an inconsistent manner along the edge of the battery pack and are discharged to the venting section 15, and the holes that make up the venting section are easily blocked by particles generated inside the battery, causing an increase in internal pressure. Therefore, the battery pack structure cannot withstand the internal pressure and collapses, exposing the flames to the outside and causing rapid transition between battery modules. A solution to this problem is needed. Summary of the Invention [Problem to be solved by the invention]

[0010] An object of the present invention is to provide a battery pack with improved safety and durability, and a device including the same.

[0011] However, the problems to be solved by the embodiments of the present invention are not limited to the above problems, and can be variously expanded within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0012] A battery pack according to one embodiment of the present invention includes at least one battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame that houses the battery cell stack; a first pack frame that mounts the battery module; a second pack frame that is positioned to cover the battery module; and a venting portion provided on one surface of the first pack frame, the venting portion communicating with a venting path formed by a plurality of partition members positioned on the first pack frame.

[0013] The first pack frame may include a side frame protruding from a bottom surface of the first pack frame along an edge of the first pack frame toward the second pack frame, and the plurality of partition members may be positioned between the battery modules and the side frame.

[0014] The plurality of partition members may be positioned to correspond to a portion between a first side surface of the battery module and a first side surface frame facing the first side surface, and a portion between a second side surface of the battery module and a second side surface frame facing the second side surface, respectively, and the first side surface and the second side surface may be opposite side surfaces of the battery cell stack facing each other along a stacking direction of the battery cell stack.

[0015] The partition member may be positioned parallel to the first and second side surfaces of the battery module and the first and second side frames.

[0016] One end of one of the partition members may contact a third side frame, which is one side frame perpendicular to the first side frame and the second side frame, and the other end of the partition member adjacent to the one of the partition members may contact a fourth side frame, which is the remaining side frame facing the third side frame.

[0017] The plurality of partition members may be alternately positioned between the battery module, the first side frame, and the second side frame.

[0018] The plurality of partition members may form a zigzag venting path.

[0019] In a battery pack according to another embodiment of the present invention, the partition member includes a first surface facing the second pack frame, and recessed portions on second and third surfaces perpendicular to the first surface.

[0020] A filler member is positioned in the recess, and the width of the filler member corresponds to the distance between the second surface and the third surface of the partition member, and the height of the filler member corresponds to the vertical distance from the first surface to the recess.

[0021] The filler member may include at least one hole penetrating one surface of the filler member parallel to the second surface of the partition member and another surface of the filler member parallel to the third surface of the partition member.

[0022] The filler member may be hollow.

[0023] The filler member may be a thermoplastic material.

[0024] The second pack frame and the partition member may be connected and fixed by a connecting member, and the connecting member may penetrate the second pack frame and be inserted into a connecting portion, which is a groove provided on one surface of the partition member facing the second pack frame.

[0025] A battery pack according to yet another embodiment of the present invention further includes a sealing member interposed between the partition member and the second pack frame.

[0026] A device according to yet another embodiment of the present invention includes the battery pack described above. [Effects of the Invention]

[0027] According to the embodiment, by setting a venting path inside the battery pack, the safety and durability of the battery pack can be improved.

[0028] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a diagram showing a venting path in a conventional battery pack. [Figure 2] 1 is a perspective view of a battery pack according to an embodiment of the present invention; [Figure 3] 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention; [Figure 4] 3 is a perspective view of the battery pack of FIG. 2 as seen from the −z axis direction. [Figure 5] 1 is a diagram schematically illustrating a battery pack according to another embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged view showing a first region of FIG. 5. [Figure 7] (a) is a perspective view of the filler member, (b) is a cross-sectional view taken along line B-B' in Figure 7(a), (c) is a view of the filler member taken along the x-axis direction in Figure 7(a), and (d) is a view of the filler member taken along the y-axis direction in Figure 7(a). [Figure 8] 10 is a view showing a state in which the filler member of the present invention is coupled to a second pack frame. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement various embodiments of the present invention. The present invention can be embodied in several different forms and is not limited to the examples described herein.

[0031] In order to clearly describe the present invention, parts that are not relevant to the description will be omitted and the same reference numerals will be used throughout the specification to refer to the same or similar components.

[0032] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of explanation, and the present invention is not necessarily limited to those shown in the drawings. In the drawings, thicknesses are exaggerated to clearly show multiple layers and regions. In the drawings, thicknesses of some layers and regions are exaggerated for the convenience of explanation.

[0033] Furthermore, when a layer, film, region, plate, or other part is said to be "on" or "above" another part, this includes not only the case where it is "directly above" that other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in the middle. Furthermore, being "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being "above" or "above" facing the opposite direction of gravity.

[0034] Furthermore, throughout the specification, when a part "comprises" a certain element, it does not mean that it excludes other elements, but that it may further include other elements, unless otherwise specified.

[0035] Furthermore, throughout the specification, "on a plane" means when the target part is viewed from above, and "on a cross section" means when the target part is cut vertically and viewed from the side.

[0036] Figure 2 is a perspective view of a battery pack according to an embodiment of the present invention, and Figure 3 is an exploded perspective view of a battery pack according to an embodiment of the present invention.

[0037] Referring to Figures 2 and 3, the battery pack 1000 according to this embodiment includes at least one battery module 100 housed inside the battery pack frames 1100 and 1200, a partition member 2000 located inside the battery pack frames 1100 and 1200, and a vent portion 3000 provided on one side of the battery pack frame.

[0038] The battery pack frame includes a first pack frame 1100 to which the battery module 100 is attached and a second pack frame 1200 positioned to cover the battery module 100 .

[0039] Specifically, at least one battery module 100 can be attached to the bottom surface of the first pack frame 1100. The first pack frame 1100 includes a side frame 1150 that protrudes from the bottom surface toward the second pack frame 1200.

[0040] The side frame 1150 may protrude toward the second pack frame 1200 along the edge of the bottom surface of the first pack frame 1100. More specifically, the side frame 1150 may protrude toward the second pack frame 1200 along each corner of the bottom surface of the first pack frame 1100. Here, the top surface (z-axis direction) of the side frame 1150 may contact the second pack frame 1200. At this time, the top surface of the side frame 1150 and the second pack frame 1200 may be joined to each other by a method such as welding, thereby sealing the inside of the battery pack 1000. In addition, the side frame 1150 surrounds the plurality of battery modules 100 and can protect the battery modules 100 from external impact.

[0041] The second pack frame 1200 is positioned to cover the battery module 100 , and the edge of the second pack frame 1200 is positioned to contact the side frame 1150 .

[0042] That is, the first pack frame 1100 and the second pack frame 1200 are joined to each other by a method such as welding, and the inside of the battery pack 1000 can be sealed.

[0043] The battery module 100 may include a battery cell stack 120 in which a plurality of battery cells are stacked in a predetermined direction, and module frames 210, 250. The module frames 210, 250 may include an upper frame 210 and a lower frame 250, and the battery cell stack 120 may be attached between the upper frame 210 and the lower frame 250 to form the battery module 100. However, the module frames 210, 250 are not limited to the above and may be monoframes made of a metal plate material with top, bottom, and both side surfaces integrated together.

[0044] Here, the battery cells are not particularly limited in type, and may be pouch-type secondary batteries or prismatic secondary batteries, but are preferably pouch-type secondary batteries.

[0045] There may be a plurality of partition members 2000, at least two or more. In the drawings, five partition members 2000 are shown on each side of the battery module 100, but this is merely an example and is not intended to be limiting. For example, the number of partition members 2000 may be more or less than that shown in the drawings.

[0046] The partition wall member 2000 may be provided on the first pack frame 1100. Specifically, the partition wall member 2000 may be located on the first pack frame 1100 to form a venting path for discharging venting gas and flames generated from the battery module 100.

[0047] The partition member 2000 may have a shape that protrudes from the bottom surface of the first pack frame 1100 toward the second pack frame 1200. In this case, the height of the partition member 2000 may be the same as or smaller than the height of the side frame 1150, and the height refers to the distance between the bottom surface of the first pack frame 1100 and the second pack frame 1200.

[0048] The partition member 2000 is a separate metal plate and may be positioned on the first pack frame 1100 and joined to the first pack frame 1100 by a method such as welding, or may be injection molded together with the first pack frame 1100.

[0049] The plurality of partition members 2000 may include a coupling portion 2001 located on one surface facing the second pack frame 1200. The coupling portion 2001 is a groove located on one surface of the partition members 2000, and serves to couple and fix the partition members 2000 to the second pack frame 1200 with a coupling member. In this case, the coupling member may be, for example, a bolt.

[0050] The venting part 3000 is connected to the venting path formed by the partition member 2000 and can discharge the venting gas that has moved through the venting path to the outside. The venting part 3000 may be provided on one side of the first pack frame 1100, and more specifically, the venting part 3000 may be provided on one side of the side frame 1150.

[0051] The venting portion 3000 may be at least one hole penetrating the first pack frame 1100. That is, the venting portion 3000 may be at least one hole penetrating the side frame 1150. In this case, the venting portion 3000 may be configured to include a filter that discharges only venting gas to the outside and prevents moisture and dust from entering the battery pack, or may be a rupture disk that breaks due to internal pressure. However, the venting portion 3000 is not limited to the above structure and may be any structure that can discharge gas inside the battery pack to the outside.

[0052] The partition member 2000 and the venting path formed thereby will be described in more detail below.

[0053] FIG. 4 is a perspective view of the battery pack of FIG. 2 as seen from the −z axis direction.

[0054] Referring to FIG. 4, a plurality of partition members 2000 may be provided in correspondence with each other with the battery module 100 sandwiched therebetween.

[0055] The plurality of partition members 2000 may be positioned to correspond to each other between one side of the battery module 100 and the side frame 1150, and between the other side of the battery module 100 and the side frame 1150. More specifically, the plurality of partition members 2000 may be positioned to correspond to each other between the first side 101 of the battery module 100 and the first side frame 1151, and between the second side 102 of the battery module 100 and the second side frame 1152.

[0056] Here, the first side surface 101 and the second side surface 102 of the battery module 100 refer to both side surfaces of the battery cell stack 120 that face each other in the stacking direction of the battery cell stack 120. The first side surface frame 1151 refers to the side surface frame 1150 facing the first side surface 101, and the second side surface frame 1152 refers to the side surface frame 1150 facing the second side surface 102, and the first side surface frame 1151 and the second side surface frame 1152 may be side surfaces 1150 facing each other. In this case, the plurality of partition members 2000 are positioned parallel to the first side surface 101 and the second side surface 102 of the battery module 100 and the first side surface frame 1151 and the second side surface frame 1152.

[0057] One end of one partition wall member 2000 may contact the third side frame 1153, which is one side frame perpendicular to the first side frame 1151 and the second side frame 1152. The other end of the partition wall member 2000 adjacent to one partition wall member 2000 may be positioned to contact the fourth side frame 1154, which is the remaining side frame facing the third side frame 1153. As described above, multiple partition wall members 2000 may be alternately positioned between the battery modules 100 and the side frames 1150, and therefore, the venting path formed by the partition wall members 2000 may be zigzag-shaped. This is because it is difficult to increase the path lengthwise in a battery pack having a certain area, so by setting the venting path in a zigzag shape, the width of the venting path is narrow but the length is long.

[0058] The venting unit 3000 may be formed on one side of the pack frame where the venting path ends. For example, the venting unit 3000 may be located on the first side frame 1151 and the second side frame 1152, which are the side frames 1150 where the venting path ends. A plurality of venting units 3000 may be provided, with at least one venting unit 3000 provided on each of the first side frame 1151 and the second side frame 1152.

[0059] As described above, the provision of a plurality of partition members 2000 realizes a complex zigzag venting path, allowing high-temperature gas generated from the battery module 100 to be cooled and discharged to the outside as it moves through the venting path. Specifically, this is because the high-temperature gas takes longer to cool as it passes through the longer venting path than before, and the degree of cooling is improved as the gas collides with the partition members 2000.

[0060] In addition, when high-temperature particles generated from the battery module 100 move along the venting path, the particles are dispersed and evenly deposited in the venting path, preventing them from reaching the venting part 3000, or, even if they are transported, delaying the time it takes for the particles to clog the venting part 3000. In other words, unlike conventional technology, the particles do not clog the venting hole, or, if they do clog, they do so more slowly than before, thereby preventing an increase in the internal pressure of the battery pack.

[0061] Furthermore, even if a flame does occur, the complexity of the venting path may prevent the flame from escaping directly to the outside, and the zigzag corners may have the effect of cooling or filtering the flame.

[0062] In summary, the high-temperature gas, particles, and flames move along the venting path while turning 90 to 180 degrees, which causes some of the high-temperature gas and flames to cool and the particles to be dispersed and located along the venting path. Therefore, even if high pressure is maintained inside the battery pack, the battery pack structure will not collapse until the battery module is completely burned, and no flames will occur outside the battery pack, improving safety.

[0063] Fig. 5 is a diagram schematically showing a battery pack according to another embodiment of the present invention. Fig. 6 is an enlarged view showing a first region of Fig. 5. Fig. 7(a) is a perspective view of a filler member. Fig. 7(b) is a cross-sectional view taken along line B-B' in Fig. 7(a). Fig. 7(c) is a diagram showing the filler member as viewed in the x-axis direction in Fig. 7(a). Fig. 7(d) is a diagram showing the filler member as viewed in the y-axis direction in Fig. 7(a).

[0064] The battery pack described in FIGS. 5 to 7 is a modified example of the embodiment of the present invention disclosed in FIGS. 2 to 4, and detailed description of the same configuration as that described above will be omitted.

[0065] 5 and 6, a battery pack 1000 according to another embodiment includes a filler member 2500 located in a recess 2100 provided in a partition member 2000.

[0066] The partition member 2000 includes a recess 2100 recessed in one surface facing the second pack frame 1200. The recess 2100 may be recessed portions in one surface facing the second pack frame 1200 and in one area of ​​both side surfaces perpendicular to the one surface. Specifically, the recess 2100 may be recessed portions in one area of ​​a first surface 2010 facing the second pack frame 1200 and in one area of ​​a second surface 2020 and a third surface 2030 perpendicular to the first surface 2010.

[0067] A plurality of recesses 2100 may be positioned at intervals in one partition member 2000, and a filler member 2500 may be positioned in the recesses 2100. The filler member 2500 may be positioned while filling the recesses 2100.

[0068] 6, 7(a), and 7(d), the filler member 2500 may include at least one hole 2510 penetrating the filler member 2500. Specifically, a plurality of holes 2510 are formed on one surface of the filler member 2500 parallel to the second surface 2020 and the third surface 2030 of the partition member 2000 and on the other surface facing the same. That is, the holes 2510 are formed penetrating both the one surface and the other surface of the filler member 2500.

[0069] In this case, the high-temperature gas moving along the venting path can move more flexibly to the adjacent venting path through the holes 2510 of the filler member 2500 and be discharged to the outside more quickly, thereby reducing the internal pressure of the battery pack 1000 and preventing the partition member 2000 from collapsing or breaking.

[0070] 7(b), filler member 2500 may be hollow and have an open interior. Therefore, when high-temperature gas or flame flows into filler member 2500 through holes 2510, the high-temperature gas or flame can be cooled while staying for a while in the hollow region of filler member 2500. Alternatively, when high-temperature particles flow into filler member 2500 through holes 2510, the particles are confined in the hollow region of filler member 2500 and cannot exit to the vent path, thereby preventing the particles from clogging vent portion 3000.

[0071] 6 and 7(c), the width (wf) of the filler member 2500 may correspond to the distance between the second surface 2020 and the third surface 2030 of the partition member 2000, and the height (hf) of the filler member 2500 may correspond to the vertical distance from the first surface 2010 to the recess 2100. Therefore, the shape of the recess 2100 and the outer shape of the filler member 2500 may correspond to each other.

[0072] In this drawing, the recess 2100 and the filler member 2500 are shown as rectangular parallelepiped shapes, but are not limited to this shape and may have any shape as long as the partition member 2000 is partially recessed.

[0073] The filler member 2500 may be formed of a material that melts at a high temperature. Specifically, the filler member 2500 may be a thermoplastic material, such as silicon (Si). The filler member 2500 may be inserted into the recess 2100 after plastic injection, or may be formed by insert injection together with the partition member 2000.

[0074] When a high-temperature flame occurs, the filler member 2500 melts due to the heat, leaving an open area in the partition member 2000 that is as large as the recess 2100. In this case, the filler member 2500 melted by the heat acts as a resistance to the heat source, thereby cooling the temperature inside the battery pack 1000. Furthermore, as the filler member 2500 melts, more high-temperature gas and flames can move to adjacent venting paths and be discharged to the outside, thereby reducing the pressure inside the battery pack 1000 and preventing the partition member 2000 from collapsing or breaking.

[0075] That is, compared to when only the partition member 2000 is positioned inside the battery pack 10000, the positioning of the filler member 2500 in the recess 2100 improves durability against pressure inside the battery pack 1000 and can prevent structural collapse of the battery pack 1000. Therefore, the safety of the battery can be improved.

[0076] FIG. 8 is a view showing the filler member of this embodiment coupled to the second pack frame.

[0077] Referring to FIG. 8, the filler member 2500 is positioned in the recess 2100 of the partition member 2000, and at this time, the surface of the filler member 2500 facing the second pack frame 1200 can be positioned on the same line as the first surface 2010 of the partition member 2000.

[0078] The partition member 2000 and the second pack frame 1200 may be coupled and fixed to each other by a coupling member 4000. Specifically, the coupling member 4000 may penetrate the second pack frame 1200 and be inserted into the coupling portion 2001 of the partition member 2000 to couple and fix them together.

[0079] A sealing member 2800 may be interposed between the partition member 2000 and the second pack frame 1200. That is, the sealing member 2800 may be interposed to cover a first surface 2010 of the partition member 2000 and one surface of the filler member 2500 facing the second pack frame 1200. In this case, the connecting member 4000 may penetrate not only the second pack frame 1200 but also the sealing member 2800 and be inserted into the connecting portion 2001 to be connected and fixed.

[0080] The sealing member 2800 can fill the gap between the second pack frame 1200 and the partition wall member 2000. That is, the sealing member 2800 can fill the assembly tolerance caused by the joining member 4000 penetrating the second pack frame 1200. Although not shown in the drawings, the sealing member 2800 can also be interposed between the second pack frame 1200 and the side frame 1150. That is, the sealing member 2800 can fill the gap between the second pack frame 1200 and the partition wall member 2000 or between the second pack frame 1200 and the side frame 1150, thereby preventing moisture, dust, and the like from entering the battery pack from the outside. This improves the waterproof and dustproof performance of the battery, thereby improving the safety of the battery.

[0081] The sealing member 2800 may be made of an adhesive material. Alternatively, the sealing member 2800 may be made of a dispensing type material. For example, the sealing member 2800 may be made of silicon (Si).

[0082] Therefore, the presence of the sealing member 2800 allows the partition member 2000 and the filler member 2500 or the side frame 1150 to be more firmly coupled to the second pack frame 1200, thereby improving the durability of the battery pack. In addition, the sealing member 2800 is a dispensing type that can be easily applied, thereby improving process efficiency.

[0083] The battery pack described above can be applied to various devices, including transportation means such as electric bicycles, electric cars, and hybrid cars, but the present invention is not limited thereto and can be applied to various devices that can use a battery module and a battery pack including the same, which also fall within the scope of the present invention.

[0084] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention. [Explanation of symbols]

[0085] 100 battery modules 1000 battery packs 1100 1st Pack Frame 1150 Side Frame 1200 2nd Pack Frame 2000 Partition wall material 2500 Filler material 2800 Sealing materials 3000 Venting Unit 4000 Connecting member

Claims

1. at least one battery module including a battery cell stack in which a plurality of battery cells are stacked, and a module frame that houses the battery cell stack; a first pack frame for mounting the battery module; a second pack frame positioned to cover the battery module; and a venting portion provided on one surface of the first pack frame, The venting portion communicates with a venting path formed by a plurality of partition members located on the first pack frame.

2. the first pack frame includes a side frame that protrudes from a bottom surface of the first pack frame along an edge of the first pack frame toward the second pack frame, The battery pack according to claim 1 , wherein the plurality of partition members are located between the battery modules and the side frames.

3. the plurality of partition members are positioned to correspond to a portion between a first side surface of the battery module and a first side frame facing the first side surface, and a portion between a second side surface of the battery module and a second side frame facing the second side surface, respectively; The battery pack according to claim 2 , wherein the first side surface and the second side surface are opposite side surfaces of the battery cell stack that face each other along a stacking direction of the battery cell stack.

4. The battery pack according to claim 3 , wherein the partition member is positioned parallel to the first side surface and the second side surface of the battery module and the first side frame and the second side frame.

5. one end of the one partition member contacts a third side frame, which is a side frame perpendicular to the first side frame and the second side frame; The battery pack according to claim 3 , wherein the other end of the partition member adjacent to the one partition member contacts a fourth side frame that is the remaining side frame facing the third side frame.

6. The battery pack according to claim 5 , wherein the plurality of partition members are alternately positioned between the battery module, the first side frame, and the second side frame.

7. The battery pack according to claim 6 , wherein the plurality of partition members form a zigzag venting path.

8. 8. The battery pack according to claim 1, wherein the partition member includes a first surface facing the second pack frame, and a recess in which a region of a second surface and a third surface perpendicular to the first surface are recessed.

9. A filler member is positioned in the recess, a width of the filler member corresponding to a distance between the second surface and the third surface of the partition member; The battery pack according to claim 8 , wherein a height of the filler member corresponds to a vertical distance from the first surface to the recess.

10. 10. The battery pack of claim 9, wherein the filler member includes at least one hole penetrating one surface of the filler member parallel to the second surface of the partition member and another surface of the filler member parallel to the third surface of the partition member.

11. The battery pack according to claim 9 , wherein the filler member is hollow.

12. The battery pack according to claim 9 , wherein the filler member is a thermoplastic material.

13. the second pack frame and the partition member are connected and fixed by a connecting member, The battery pack according to claim 1 , wherein the coupling member penetrates the second pack frame and is inserted into a coupling portion that is a groove provided on one surface of a partition member facing the second pack frame.

14. The battery pack according to claim 1 , further comprising a sealing member interposed between the partition member and the second pack frame.

15. A device comprising a battery pack according to any one of claims 1 to 7.

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