Battery pack and device including the same

Abstract

The present invention comprises a battery pack and an apparatus comprising the same, the battery pack according to one embodiment of the present invention comprising: at least one battery module comprising a battery cell stack having a plurality of stacked battery cells, and a module frame for accommodating the battery cell stack; a first pack frame for mounting the battery module; a second battery pack frame positioned to cover the battery module; and an exhaust portion provided on one surface of the first battery pack frame, in which the exhaust portion communicates with an exhaust path formed by a plurality of partition members located on the first battery pack frame.

Description

Technical Field

[0001] Cross - Reference to Related Applications

[0002] This application claims the benefit of Korean Patent Application No. 10 - 2022 - 0158755, filed with the Korean Intellectual Property Office on November 23, 2022, the disclosure of which is incorporated herein by reference in its entirety.

[0003] The present disclosure relates to a battery pack and a device including the battery pack, and more particularly, to a battery pack having improved safety and a device including the battery pack. Background Art

[0004] With the technological development of mobile devices and the increasing demand for mobile devices, the demand for secondary batteries as an energy source has increased rapidly. Accordingly, various studies have been conducted on batteries that can meet various demands.

[0005] Secondary batteries have attracted considerable attention as an energy source for power - driven devices such as electric bicycles, electric vehicles, and hybrid vehicles, as well as for mobile devices such as mobile phones, digital cameras, and laptop computers.

[0006] In recent years, with the increasing necessity of a large - capacity secondary battery structure, including using secondary batteries as an energy storage source, the demand for a battery pack having a multi - module structure, which is a component of battery modules in which a plurality of secondary batteries are connected in series and / or in parallel, has been growing.

[0007] Meanwhile, when a plurality of battery cells are connected in series or in parallel to configure a battery pack, generally, a battery module composed of at least one battery cell is first configured, and then a battery pack is configured by using at least one battery module and adding other components. Since the battery cells constituting such a medium - sized or large - sized battery module are composed of secondary batteries that can be charged and discharged, such high - output large - capacity secondary batteries generate a large amount of heat during the charging and discharging processes.

[0008] A plurality of battery cells may be connected in series / in parallel to form a battery pack. In this case, generally, a battery module composed of at least one battery cell is first configured, and then a battery pack is configured by using at least one battery module and adding other components. Since the battery cells constituting such a medium - sized or large - sized battery module are composed of secondary batteries that can be charged and discharged, such high - output large - capacity secondary batteries generate a large amount of heat during the charging and discharging processes, which may lead to a thermal runaway phenomenon and thus generate exhaust gas or fire inside the battery.

[0009] Figure 1 is a diagram showing an exhaust path in a conventional battery pack.

[0010] Reference Figure 1 Figure 1 [0000025], the battery pack 10 is provided with an exhaust portion 15 that discharges exhaust gas or flames generated inside the battery pack 10 to the outside. However, the exhaust gas or flames generated in the conventional battery module move along the edge of the battery pack without directionality and then are discharged into the exhaust portion 15, and the holes constituting the exhaust portion are easily blocked by particles generated inside the battery, resulting in an increase in internal pressure. Therefore, the battery pack structure cannot withstand the internal pressure and collapses, and the flames are exposed to the outside, leading to rapid spread between battery modules. Therefore, it is necessary to solve these problems. Summary of the Invention

[0011] Technical Problem

[0012] An object of the present disclosure is to provide a battery pack having improved safety and durability and a device including the battery pack.

[0013] However, the technical problems to be solved by the embodiments of the present disclosure are not limited to the above problems, and various extensions can be made within the scope of the technical ideas included in the present disclosure.

[0014] Technical Solution

[0015] According to an embodiment of the present disclosure, there is provided a battery pack including: at least one battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame accommodating the battery cell stack; a first battery pack frame on which the battery module is mounted; a second battery pack frame positioned while covering the battery module; and an exhaust portion provided on one surface of the first battery pack frame, wherein the exhaust portion communicates with an exhaust path formed by a plurality of partition members located on the first battery pack frame.

[0016] The first battery pack frame includes a side frame that protrudes from the bottom surface of the first battery pack frame toward the second battery pack frame along the edge of the first battery pack frame, and a plurality of partition members may be located between the battery module and the side frame.

[0017] A plurality of partition members are respectively located between the first side surface of the battery module and the first side frame facing the first side surface and between the second side surface of the battery module and the second side frame facing the second side surface, and the first side surface and the second side surface may be two side surfaces of the battery cell stack that face each other along the stacking direction of the battery cell stack.

[0018] The partition members may be 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.

[0019] One end of a partition member may be in contact with a third side frame, which is a side frame perpendicular to the first side frame and the second side frame, and the other end of the partition member adjacent to the said one partition member may be in contact with a fourth side frame, which is the remaining side frame facing the third side frame.

[0020] A plurality of partition members may be alternately positioned between the battery module and the first side frame and between the battery module and the second side frame, respectively.

[0021] A plurality of partition members may form an exhaust path in a zigzag shape.

[0022] In a battery pack according to another embodiment of the present disclosure, the partition member includes a recess in which a region of the first surface facing the second battery pack frame and the second surface and the third surface perpendicular to the first surface are recessed.

[0023] A filling member is located in the recess, the width of the filling member corresponds to the distance between the second surface and the third surface of the partition member, and the height of the filling member may correspond to the vertical distance between the first surface and the recess.

[0024] The filling member may include at least one hole that penetrates one surface of the filling member parallel to the second surface of the partition member and another surface of the filling member parallel to the third surface of the partition member.

[0025] The filling member may have a hollow shape.

[0026] The filling member may be a thermoplastic material.

[0027] The second battery pack frame and the partition member are coupled and fixed by a coupling member, and the coupling member penetrates the second battery pack frame and may be inserted into a coupling portion, which is a groove provided on a surface of the partition member facing the second battery pack frame.

[0028] A battery pack according to still another embodiment of the present disclosure further includes a sealing member interposed between the partition member and the second battery pack frame.

[0029] According to still another embodiment of the present disclosure, there is provided an apparatus including the above-described battery pack.

[0030] Advantageous Effects

[0031] According to an embodiment, the safety and durability of the battery pack can be improved by providing an exhaust path inside the battery pack.

[0032] The effects obtainable from the present disclosure are not limited to the above effects, and those skilled in the art will clearly understand additional other effects not mentioned herein from the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a diagram showing an exhaust path in a conventional battery pack.

[0034] Figure 2 is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0035] Figure 3 is an exploded perspective view of a battery pack according to an embodiment of the present disclosure.

[0036] Figure 4 is viewed from the z-axis direction Figure 2 of the battery pack.

[0037] Figure 5 is a diagram schematically showing a battery pack according to another embodiment of the present disclosure.

[0038] Figure 6 shows Figure 5 an enlarged view of the first region of.

[0039] Figure 7 (a) of is a perspective view of a filling member. Figure 7 (b) of is a cross-sectional view taken along line B-B' of Figure 7 (a) of. Figure 7 (c) of is a view of the filling member viewed in the x-axis direction of Figure 7 (a) of. Figure 7 (d) of is a view of the filling member viewed in the y-axis direction of Figure 7 (a) of.

[0040] Figure 8 is a diagram showing a state in which the filling member of the present disclosure is coupled to a second battery pack frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the drawings, so that those skilled in the art can easily implement them. The present disclosure can be modified in various different ways and is not limited to the embodiments described herein.

[0042] For clarity, descriptions of parts irrelevant to the specification will be omitted, and throughout the specification, the same reference numerals denote the same or similar elements.

[0043] In addition, in the drawings, for ease of description, the dimensions and thicknesses of each element are arbitrarily shown, and the present disclosure is not necessarily limited to the dimensions and thicknesses shown in the drawings. In the drawings, for clarity, the thicknesses of layers, regions, etc. are exaggerated. In the drawings, for ease of description, the thicknesses of components and regions are exaggerated.

[0044] In addition, it should be understood that when an element such as a layer, film, region, or plate is referred to as being "on another element" or "above another element", it can be directly on the other element or there can also be an intermediate element. Conversely, when an element is referred to as being "directly on another element", this means that there are no other intermediate elements. In addition, a certain part located "above" or "on" a reference part means a certain part located above or below the reference part, rather than specifically meaning "above" or "on" in the opposite direction of gravity.

[0045] In addition, throughout the specification, when a part is referred to as "including" or "containing" a certain component, this means that the part may also include other components without excluding other components, unless otherwise specified.

[0046] In addition, throughout the specification, when it is referred to as "planar", this means when observing the target part from the upper side, and when it is referred to as "cross-section", this means when observing the target part from one side of a vertically cut cross-section.

[0047] Figure 2 is a perspective view of a battery pack according to an embodiment of the present disclosure. Figure 3 is an exploded perspective view of the battery pack according to an embodiment of the present disclosure.

[0048] Refer to Figure 2 and Figure 3 According to Embodiment, the battery pack 1000 includes at least one battery module 100 accommodated within battery pack frames 1100 and 1200, a partition member 2000 located within battery pack frames 1100 and 1200, and an exhaust part 3000 provided on one surface of the battery pack frame.

[0049] The battery pack frame includes a first battery pack frame 1100 on which the battery module 100 is mounted and a second battery pack frame 1200 positioned while covering the battery module 100.

[0050] Specifically, at least one battery module 100 can be mounted on the bottom surface of the first battery pack frame 1100. The first battery pack frame 1100 includes side frames 1150 protruding from the bottom surface toward the second battery pack frame 1200.

[0051] The side frame 1150 can protrude toward the second battery pack frame 1200 along the edge of the bottom surface of the first battery pack frame 1100. More specifically, the side frame 1150 can protrude toward the second battery pack frame 1200 along the corresponding corners of the bottom surface of the lower battery pack frame 1100. Here, the upper surface (z-axis direction) of the side frame 1150 can contact the second battery pack frame 1200. At this time, the upper surface of the side frame 1150 and the upper battery pack frame 1200 can be joined to each other by a method such as welding to seal the interior 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 impacts.

[0052] The second battery pack frame 1200 is positioned while covering the battery module 100, and the edge of the second battery pack frame 1200 is positioned while contacting the side frame 1150.

[0053] That is, the first battery pack frame 1100 and the second battery pack frame 1200 can be joined to each other by a method such as welding to seal the interior of the battery pack 1000.

[0054] The battery module 100 may include a battery cell stack 120 in which a plurality of battery cells are stacked in a preset direction, and module frames 210 and 250. The module frames 210 and 250 may include an upper frame 210 and a lower battery pack frame 250, and the battery cell stack 120 may be installed between the upper frame 210 and the lower battery pack frame 250 to configure the battery module 100. However, the module frames 210 and 250 are not limited to the above, and may be a single frame in the form of a metal plate in which the upper surface, the lower surface, and the two side surfaces are integrated.

[0055] Here, the battery cell may be a pouch-type secondary battery or a square secondary battery because its type is not particularly limited. However, a pouch-type secondary battery is preferred.

[0056] The partition members 2000 may be formed in a plurality, that is, formed into at least two or more. In this figure, five partition members 2000 are shown to be formed respectively and the battery modules 100 are inserted therebetween, but this is for illustrative purposes and is not limited thereto. For example, the number of the partition members 2000 may be greater than or less than the number shown in this figure.

[0057] The partition members 2000 may be provided in the first battery pack frame 1100. Specifically, the partition members 2000 may be located on the first battery pack frame 1100 to form an exhaust path that discharges the exhaust gas and flame generated from the battery module 100.

[0058] The separating member 2000 may have a shape protruding from the bottom surface of the first battery pack frame 1100 toward the second battery pack frame 1200. In this case, the height of the separating member 2000 may be equal to or less than the height of the side frame 1150, where the height refers to the distance between the bottom surface of the first battery pack frame 1100 and the second battery pack frame 1200.

[0059] The separating member 2000 is a separate metal plate, which may be located on the first battery pack frame 1100 such that it can be coupled to the first battery pack frame 1100 by a method such as welding, or it may also be in a form injection-molded together with the first battery pack frame 1100.

[0060] A plurality of separating members 2000 may include a coupling portion 2001 located on one surface facing the second battery pack frame 1200. The coupling portion 2001 is a groove located on one surface of the separating member 2000, and may perform the function of coupling and fixing the separating member 2000 to the second battery pack frame 1200 through a coupling member. At this time, the coupling member may be, for example, a bolt.

[0061] The exhaust portion 3000 communicates with the exhaust path formed by the separating member 2000, and may discharge the exhaust gas that has moved through the exhaust path to the outside. The exhaust portion 3000 may be provided on one surface of the first battery pack frame 1100, and specifically, the exhaust portion 3000 may be provided on one surface of the side frame 1150.

[0062] The exhaust portion 3000 may be at least one hole penetrating the first battery pack frame 1100. That is, the exhaust portion 3000 may be at least one hole penetrating the side frame 1150. In this case, the exhaust portion 3000 may be configured to include a filter that only discharges the exhaust gas to the outside and prevents moisture or dust from the outside from flowing into the battery pack, or it may be a bursting disc that ruptures due to internal pressure. However, the exhaust portion 3000 is not limited to the above structure, and may be used without limitation as long as it has a structure that can discharge the gas inside the battery pack to the outside.

[0063] Next, the separating member 2000, or the exhaust path formed thereby, etc. will be described in more detail.

[0064] Figure 4 is a perspective view of the battery pack viewed from the z-axis direction Figure 2 of the battery pack.

[0065] Refer to Figure 4 , a plurality of separating members 2000 may be provided to correspond to each other and allow the battery module 100 to be inserted therebetween.

[0066] A plurality of partition members 2000 may be correspondingly located between one side surface of the battery module 100 and the side frame 1150, and between the other side surface of the battery module 100 and the side frame 1150. More specifically, the plurality of partition members 2000 may be correspondingly located between the first side surface 101 of the battery module 100 and the first side frame 1151, and between the second side surface 102 of the battery module 100 and the second side frame 1152.

[0067] Here, the first side surface 101 and the second side surface 102 of the battery module 100 refer to two side surfaces of the battery cell stack 120 that are opposite to each other along the stacking direction of the battery cell stack 120. And, the first side frame 1151 refers to the side frame 1150 facing the first side surface 101, the second side frame 1152 refers to the side frame 1150 facing the first side surface 102, and the first side frame 1151 and the second side frame 1152 may be side frames 1150 facing each other. At this time, 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 frame 1151 and the second side frame 1152.

[0068] One end of a partition member 2000 may be in contact with the third side frame 1153, which is a side frame perpendicular to the first side frame 1151 and the second side frame 1152. The other end of the partition member 2000 adjacent to this one partition member 2000 may be positioned while being in contact with the fourth side frame 1154, which is the remaining side frame facing the third side frame 1153. As described above, the plurality of partition members 2000 may be alternately positioned between the battery module 100 and the side frame 1150, whereby the exhaust path formed by the partition members 2000 may have a zigzag shape. This is to set the exhaust path to a zigzag shape so that the width of the exhaust path is narrow but the length increases, because it is difficult to extend the path in the longitudinal direction in a battery pack having a constant area.

[0069] The exhaust portion 3000 may be formed on one surface of the battery pack frame where the exhaust path terminates. For example, the exhaust portion 3000 may be located at the first side frame 1151 and the second side frame 1152, which are the side frames 1150 where the exhaust path terminates. The exhaust portion 3000 may be provided in plurality, and at least one exhaust portion 3000 may be provided on each of the first side frame 1151 and the second side frame 1152.

[0070] As described above, when multiple separation members 2000 are provided, a complex exhaust path having a zigzag shape is implemented, such that the high-temperature gas generated from the battery module 100 can be cooled while moving through the exhaust path and discharged to the outside. Specifically, this is because the cooling time of the high-temperature gas increases as the high-temperature gas passes through a longer exhaust path than before, and the degree of cooling is enhanced when colliding with the separation member 2000.

[0071] In addition, when the high-temperature particles generated from the battery module 100 move along the exhaust path, the particles are dispersed and uniformly stacked on the exhaust path, and thus may not be conveyed to the exhaust portion 3000, or even if the particles are conveyed, the time required for the particles to clog the exhaust portion 3000 can be delayed. That is, different from the conventional case, the particles do not clog the holes in the exhaust portion, or even if the particles clog, they clog more slowly than before, thereby preventing an increase in the internal pressure of the battery pack.

[0072] In addition, even if a flame occurs, the complexity of the exhaust path prevents the flame from directly exiting to the outside, and the zigzag corner portion can exhibit an effect of cooling or filtering the flame.

[0073] In summary, the high-temperature gas, particles, and flame move along the exhaust path while bending from 90 degrees to 180 degrees, whereby the high-temperature gas and the flame are partially cooled, and the particles are dispersed and located in the exhaust path. Therefore, even if the high pressure inside the battery pack is maintained, the structure of the battery pack does not collapse until the battery module burns out, and no flame is generated outside the battery pack, thereby improving safety.

[0074] Figure 5 is a diagram schematically showing a battery pack according to another embodiment of the present disclosure. Figure 6 shows Figure 5 an enlarged view of the first region of Figure 7 (a) of Figure 7 is a perspective view of the filling member. Figure 7 (b) of Figure 7 is a cross-sectional view taken along line B-B' of (a) of Figure 7 of Figure 7 (c) of Figure 7 is a view of the filling member viewed in the x-axis direction of (a) of

[0075] Figures 5 to 7 The battery pack shown in Figures 2 to 4 is a modification of the embodiment of the present disclosure shown in

[0076] and a detailed description of the configuration identical to the above will be omitted. Figure 5 andFigure 6 According to another embodiment, the battery pack 1000 includes a filling member 2500 located in a recess 2100 provided in a partition member 2000.

[0077] The partition member 2000 includes a recess 2100 in which one surface facing the second battery pack frame 1200 is recessed. The recess 2100 may be a portion in which one region of a surface facing the second battery pack frame 1200 and two side surfaces perpendicular to the one surface are recessed. Specifically, the recess 2100 may be a portion in which one region of a first surface 2010 facing the second battery pack frame 1200 and a second surface 2020 and a third surface 2030 perpendicular to the first surface 2010 are recessed.

[0078] A plurality of recesses 2100 may be positioned spaced apart from each other in one partition member 2000, and the filling member 2500 may be located in the recesses 2100. The filling member 2500 may be positioned while filling the recesses 2100.

[0079] Reference Figure 6 、 Figure 7 of (a) and Figure 7 of (d), the filling member 2500 may include at least one hole 2510 penetrating the filling member 2500. Specifically, a plurality of holes 2510 are provided on one surface of the filling member 2500 parallel to the second surface 2020 and the third surface 2030 of the partition member 2000 and on the other surface opposite thereto. That is, the holes 2510 are formed while penetrating one surface and the other surface of the filling member 2500.

[0080] In this case, the high-temperature gas moving along the exhaust path can move more flexibly to the adjacent exhaust path through the holes 2510 of the filling member 2500 and be discharged to the outside more quickly. Therefore, the internal pressure of the battery pack 1000 is reduced, thereby preventing the collapse or breakage of the partition member 2000.

[0081] Referring to Figure 7 of (b), the filling member 2500 may have a hollow shape, that is, a shape with a hollow interior. Therefore, when the high-temperature gas or flame flows into the filling member 2500 through the holes 2510, the high-temperature gas or flame can be cooled while remaining in the hollow region of the filling member 2500 for a period of time. Alternatively, when the high-temperature particles flow into the filling member 2500 through the holes 2510, the particles are trapped in the hollow region of the filling member 2500 and cannot leave the exhaust path, thereby preventing the particles from clogging the exhaust portion 3000.

[0082] Reference Figure 6 and Figure 7In (c) thereof, the width (w f ) of the filling member 2500 may correspond to the distance between the second surface 2020 and the third surface 2030 of the partitioning member 2000, and the height (h f ) of the filling member 2500 may correspond to the vertical distance between the first surface 2010 and the recess 2100. Accordingly, the shape of the recess 2100 and the outer shape of the filling member 2500 may correspond to each other.

[0083] In this figure, the recess 2100 and the filling member 2500 are shown in the shape of a rectangular parallelepiped, but the shape is not limited thereto, and any shape is possible as long as the partitioning member 2000 is partially dug downward.

[0084] The filling member 2500 may be formed of a material that melts at a high temperature. Specifically, the filling member 2500 may be a thermoplastic material such as silicon (Si). The filling member 2500 may be inserted and positioned into the recess 2100 after plastic injection, or may be formed together with the partitioning member 2000 by insert molding.

[0085] When a high-temperature flame is generated, the filling member 2500 melts due to the heat, and the opening area corresponding to the recess 2100 may remain in the partitioning member 2000. In this case, the filling member 2500 melted due to the heat serves as a resistance to the heat source, and the temperature inside the battery pack 1000 can be cooled. In addition, when the filling member 2500 melts, more high-temperature gas or flame can move to the adjacent exhaust path and be discharged to the outside. Accordingly, the pressure inside the battery pack 1000 can be reduced, thereby preventing the partitioning member 2000 from collapsing or breaking.

[0086] That is, compared with the case where only the partitioning member 2000 is located in the battery pack 10000, the filling member 2500 is located in the recess 2100, thereby improving the durability against the pressure inside the battery pack 1000, and thus preventing the structure of the battery pack 1000 from collapsing. Accordingly, the safety of the battery can be improved.

[0087] Figure 8 is a diagram showing a state in which the filling member of the present disclosure is coupled to the second battery pack frame.

[0088] Reference Figure 8 , the filling member 2500 is located in the recess 2100 of the partitioning member 2000, wherein the surface of the filling member 2500 facing the second battery pack frame 1200 may be on the same line as the first surface 2010 of the partitioning member 2000.

[0089] The partition member 2000 and the second battery pack frame 1200 can be coupled and fixed to each other by a coupling member 4000. Specifically, the coupling member 4000 can be coupled and fixed by being inserted into the coupling portion 2001 of the partition member 2000 while penetrating the second battery pack frame 1200.

[0090] A sealing member 2800 can be interposed between the partition member 2000 and the second battery pack frame 1200. That is, the sealing member 2800 can be interposed while covering the first surface 2010 of the partition member 2000 and one surface of the filling member 2500 facing the second battery pack frame 1200. In this case, the coupling member 4000 can be coupled and fixed by being inserted into the coupling portion 2001 while penetrating not only the second battery pack frame 1200 but also the sealing member 2800.

[0091] The sealing member 2800 can fill the gap between the second battery pack frame 1200 and the partition member 2000. In other words, the sealing member 2800 can fill the assembly tolerance that occurs when the coupling member 4000 penetrates the second battery pack frame 1200. In addition, although not shown in this figure, the sealing member 2800 can also be interposed between the second battery pack frame 1200 and the side frame 1150. That is, the sealing member 2800 can fill the gap between the second battery pack frame 1200 and the partition member 2000, or the gap between the second battery pack frame 1200 and the side frame 1150, so as to prevent moisture, dust, etc. from flowing into the battery pack from the outside. Therefore, the waterproof and dustproof performance of the battery can be improved, and the safety of the battery can be improved.

[0092] The sealing member 2800 can be a material having adhesiveness. In addition, the sealing member 2800 can be a material that can be applied using a dispensing type. In one example, the sealing member 2800 can be made of silicon (Si).

[0093] Therefore, due to the interposition of the sealing member 2800, the partition member 2000 and the filling member 2500 or the side frame 1150 can be more firmly coupled to the second battery pack frame 1200, thereby improving the durability of the battery pack. In addition, since the sealing member 2800 can be simply applied using a dispensing type, the process efficiency can be improved.

[0094] The above battery pack can be applied to various devices. Such devices can be applied to vehicle devices such as electric bicycles, electric vehicles, and hybrid vehicles, but the present disclosure is not limited thereto, and such devices can also be applied to various devices that can use battery modules and battery packs including them, which fall within the scope of the present disclosure.

[0095] Although the present invention has been described in detail above with reference to the preferred embodiments of the present invention, those skilled in the art will understand that the scope of the present disclosure is not limited thereto, and various modifications and improvements can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0096] [Description of Reference Numerals]

[0097] 100: Battery module

[0098] 1000: Battery pack

[0099] 1100: First battery pack frame

[0100] 1150: Side frame

[0101] 1200: Second battery pack frame

[0102] 2000: Partition member

[0103] 500: Filling member

[0104] 800: Sealing member

[0105] 3000: Exhaust portion

[0106] 4000: Connecting member

Claims

1. A battery pack, the battery pack include: at least one battery module, the battery module comprising a battery cell stack in which a plurality of battery cells are stacked and a module frame accommodating the battery cell stack; a first battery pack frame, the battery module being mounted on the first battery pack frame; a second battery pack frame positioned to cover the battery module; and a vent portion provided on one surface of the first battery pack frame, The exhaust portion is communicated with an exhaust path formed by a plurality of partition members located on the first battery pack frame.

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

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

4. The battery pack according to claim 3, in, The partition member is positioned in parallel with the first and second side surfaces of the battery module and the first and second side frames.

5. The battery pack according to claim 3, in, One end of one partition member is in contact with a third side frame, the third side frame being a 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 partition member is in contact with a fourth side frame which is a remaining side frame facing the third side frame.

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

7. The battery pack according to claim 6, in, The plurality of partition members form an exhaust path in a zigzag shape.

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

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

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

11. The battery pack according to claim 9, in, The filling member has a hollow shape.

12. The battery pack according to claim 9, in, The filling member is a thermoplastic material.

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

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

15. A device comprising the battery pack according to claim 1.

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