Battery pack and device including the same

Abstract

A battery pack according to an embodiment of the disclosure includes a lower pack frame on which a plurality of cell arrays are mounted, at least one cover portion located at upper portions of the plurality of cell arrays, and a ventilation portion mounted on the cover portion and extending in a length direction of the lower pack frame, wherein the cover portion covers upper portions of a pair of cell arrays arranged to face each other in a width direction of the lower pack frame, wherein the cover portion is formed with a first ventilation hole, and the first ventilation portion covers the first ventilation hole.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0080123, filed on June 21, 2021, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

[0003] This disclosure relates to a battery pack and an apparatus including the battery pack, and more specifically, to a battery pack and an apparatus including the battery pack that effectively exhausts the generated gas and flame to the outside of the battery pack when a portion of the battery cells generate gas and flame, while preventing heat transfer between adjacent battery cells. Background Technology

[0004] Rechargeable batteries, readily applicable to various product lines and possessing electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric or hybrid vehicles powered by electric drive sources, energy storage systems, and more. These rechargeable batteries are gaining attention as a new, environmentally friendly energy source for improving energy efficiency because their main advantage is a significant reduction in fossil fuel use, without producing any energy-consuming byproducts.

[0005] Currently, commercially available rechargeable batteries include nickel-cadmium (NiCd) batteries, nickel-metal hydride (NiMH) batteries, nickel-zinc (NiZn) batteries, and lithium-ion batteries. Among them, lithium-ion batteries have attracted much attention due to their advantages, such as almost no memory effect compared to nickel-based batteries, free charge and discharge capability, extremely low self-discharge rate, and high energy density.

[0006] Generally, lithium secondary batteries can be classified based on the shape of their external materials as: cylindrical or prismatic secondary batteries with electrode assemblies housed in a metal can; and pouch-type secondary batteries with electrode assemblies housed in a bag made of aluminum laminate.

[0007] In recent years, with the increasing demand for high-capacity secondary battery structures (including the use of secondary batteries as energy storage sources), the demand for medium and large-sized modular battery packs has been growing. These battery packs are components of multiple battery modules connected in series or parallel. In such battery modules, multiple battery cells are connected in series or parallel to form a battery cell stack, thereby increasing capacity and output. Furthermore, multiple battery modules can be installed together with various control and protection systems, such as a battery management system (BMS) and a cooling system, to form a battery pack.

[0008] Specifically, battery packs consist of a structure composed of multiple battery modules, and the safety and operational efficiency of the battery pack may be compromised when some of these modules experience overvoltage, overcurrent, or overheating. In particular, to increase mileage, battery pack capacity tends to increase gradually. As the internal energy of the battery pack increases accordingly, a structure that meets enhanced safety standards and ensures the safety of the vehicle and driver needs to be designed. Therefore, especially to prevent thermal runaway within the battery pack and heat transfer between battery cells, there is an increasing need for a structure that can effectively dissipate some of the gases and flames generated by the battery cells and minimize damage. Summary of the Invention

[0009] Technical issues

[0010] The purpose of this disclosure is to provide a battery pack and an apparatus including the battery pack that effectively exhausts the generated gas and flame to the outside of the battery pack when a portion of the battery cells generate gas and flame, while preventing heat transfer between adjacent battery cells.

[0011] The purpose of this disclosure is not limited to the above-described purposes, and other purposes not described herein should be clearly understood by those skilled in the art through the following detailed description and accompanying drawings.

[0012] Technical solution

[0013] According to embodiments of this disclosure, a battery pack is provided, comprising: a lower frame on which a plurality of battery cell arrays are mounted; at least one cover located on the upper portion of the plurality of battery cell arrays; and a vent portion mounted on the cover portion and extending along the length direction of the lower frame, wherein the cover portion covers the upper portion of a pair of battery cell arrays arranged to face each other along the width direction of the lower frame, wherein the cover portion forms a first vent hole, and the vent portion covers the first vent hole.

[0014] The cover may include: a first plate; a second plate located below the first plate; and a side portion connecting the edge of the first plate and the edge of the second plate.

[0015] The first ventilation hole may be formed in the center of the first plate.

[0016] The lower surface of the second plate may contact the upper part of the battery cell array.

[0017] At least one second ventilation hole may be formed in the second plate, the second ventilation hole being formed at a position adjacent to the front and rear surfaces of the battery cell array.

[0018] The ventilation section may include a first ventilation section extending along the length direction of the cover and a second ventilation section extending in a direction perpendicular to the first ventilation section.

[0019] The second ventilation section can extend through the center of the first ventilation hole to the upper surface of the cover.

[0020] The lower frame may include a bottom that contacts the lower surface of the battery cell array and a frame portion that contacts at least one side of the battery cell array.

[0021] The frame portion may be made of heat-insulating components.

[0022] The frame portion may include a side frame extending upward from the bottom edge and an inner frame located inside the side frame, and the plurality of battery cell arrays may be separated from each other by the side frame and the inner frame.

[0023] The battery pack may further include a first fastening member for securing a portion of the edge of the cover to the upper part of the inner frame, and may further include a second fastening member for securing a portion of the edge of the vent to the upper surface of the cover.

[0024] At least one rupture is formed on the outer surface of the side frame, and the rupture may be located near one end of the ventilation section.

[0025] At least one through portion is formed on the inner surface of the side frame, and the through portion is connected to one end of the ventilation portion.

[0026] According to another embodiment of this disclosure, an apparatus including the above-described battery pack is provided.

[0027] Beneficial effects

[0028] According to an embodiment, this disclosure relates to a battery pack and an apparatus including the battery pack, the battery pack including a cover and a vent for guiding the discharge direction of gas and flame. When some battery cells generate gas and flame, the gas and flame can be guided and discharged in a certain direction, thereby effectively discharging the generated gas and flame to the outside of the battery pack while preventing heat transfer between adjacent battery cells.

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

[0030] Figure 1 This is a perspective view of a battery pack according to an embodiment of the present disclosure;

[0031] Figure 2 yes Figure 1 Exploded perspective view of the cover and ventilation section of the battery pack;

[0032] Figure 3 It is shown Figure 1 A perspective view of the remaining components of the battery pack, excluding the cover and ventilation section;

[0033] Figure 4 yes Figure 1 An exploded perspective view of the lower frame of the battery pack;

[0034] Figure 5 It is along Figure 2 A cross-sectional view of the cover section taken by the cutting line C-C';

[0035] Figure 6 yes Figure 1 A magnified view of region a;

[0036] Figure 7 It shows along Figure 1 A cross-sectional view of the portion cut by the cutting line A-A';

[0037] Figure 8 It is to enlarge and show Figure 7 A portion of the image;

[0038] Figure 9 It shows along Figure 1 A partial cross-sectional view taken by the cutting line B-B'. Detailed Implementation

[0039] In the following, various embodiments of this disclosure will be described in detail with reference to the accompanying drawings to enable those skilled in the art to readily implement them. This disclosure can be modified in various different ways and is not limited to the embodiments described herein.

[0040] For clarity in describing this disclosure, parts irrelevant to the description will be omitted, and the same reference numerals will denote the same elements throughout the description.

[0041] Furthermore, in the accompanying drawings, for ease of description, the dimensions and thicknesses of each element are arbitrarily shown, and this disclosure is not necessarily limited to those shown in the drawings. In the accompanying drawings, the thicknesses of layers, regions, etc., are exaggerated for clarity. In the accompanying drawings, the thicknesses of some layers and regions are exaggerated for ease of description.

[0042] Furthermore, throughout the description, when a part is referred to as "including" or "contains" a component, it means that the part may further include other components without excluding them, unless otherwise stated.

[0043] Furthermore, throughout the description, when referred to as a "plane," it means the target portion viewed from above, and when referred to as a "section," it means the target portion viewed from the side of a vertically cut section.

[0044] A battery pack according to an embodiment of this disclosure will now be described.

[0045] Figure 1 This is a perspective view of a battery pack according to an embodiment of the present disclosure. Figure 2 yes Figure 1 An exploded perspective view of the cover and ventilation section of the battery pack.

[0046] Reference Figure 1 and Figure 2 According to an embodiment of the present disclosure, the battery pack 1000 includes: a lower frame 1100 on which a plurality of battery cell arrays 100 are mounted; at least one cover 1200 located above the plurality of battery cell arrays 100; and a ventilation portion 1300 mounted on the cover 1200 and extending along the length of the lower frame 1100.

[0047] More specifically, the cover 1200 may extend along the width direction of the lower frame 1100. Here, the width direction of the lower frame 1100 may be the same as the length direction of a pair of battery cell arrays 100 arranged facing each other.

[0048] Furthermore, the cover 1200 may cover the upper portion of a pair of battery cell arrays 100 arranged facing each other along the width direction of the lower frame 1100. More specifically, the cover 1200 may be located above the pair of battery cell arrays 100 mounted on the lower frame 1100.

[0049] Here, as Figure 1 and Figure 2 As shown, the cover 1200 may include a plurality of cover units 1200, which are assigned to each pair of battery cell arrays 100. Furthermore, with... Figure 1 and Figure 2 In contrast, cover 1200 can be configured such that multiple covers 1200 are integrated with each other.

[0050] Furthermore, a first vent 1215 may be formed on the cover portion 1200. More specifically, the first vent 1215 may be formed on the upper part of the cover portion 1200, or it may be formed at the upper center of the cover portion 1200. Furthermore, the ventilation portion 1300 may cover the first vent 1215 formed on the cover portion 1200. In other words, the first vent 1215 may be formed at a position facing the ventilation portion 1300.

[0051] Here, the first ventilation hole 1215 may extend along the width direction of the cover portion 1200. In other words, the first ventilation hole 1215 may extend along the length direction of the ventilation portion 1300.

[0052] Therefore, in the battery pack 1000 according to the embodiments of the present disclosure, when a fire occurs in a portion of the battery cell array 100, high-temperature gases and flames can be discharged through the first vent 1215 of the cover portion 1200 located at the top of the battery cell array. Furthermore, the gases and flames discharged through the first vent 1215 can flow into the ventilation section 1300 to guide ventilation along the length of the ventilation section 1300, thereby preventing heat transfer between adjacent battery cell arrays 100.

[0053] Figure 3 It is shown Figure 1 A perspective view of the remaining components of the battery pack, excluding the cover and ventilation section.

[0054] Reference Figure 1 and Figure 3 According to embodiments of the present disclosure, the battery pack 1000 can be configured such that a plurality of battery cell arrays 100 are mounted on a lower frame 1100.

[0055] Battery cell 110 is preferably a pouch-type battery cell. For example, battery cell 110 can be manufactured by housing electrode assemblies in a pouch-like casing comprising a resin layer and a metal layer, and then heat-sealing the sealed portion of the pouch-like casing. Such battery cell 110 can be formed as a rectangular sheet structure. Multiple such battery cells 110 can be constructed, and multiple battery cells 110 can be stacked to be electrically connected to each other, thereby forming a battery cell array 100.

[0056] Furthermore, the battery cell array 100 may have a structure that stacks multiple battery cells 110, but at least some components of the battery module unit are omitted. In other words, the battery cell array 100 may have a structure that minimizes the components in the battery module unit. For example, the battery cell array 100 may have a busbar frame located on the front and rear surfaces of the battery cell stack, but the module frame structure in the battery module unit is omitted. That is, the battery pack 1000 according to this embodiment has a CTP (Cell to Pack) structure, in which the battery cell array 100, omitting at least some of the battery module units, is directly mounted on the lower frame 1100.

[0057] Therefore, in the battery pack 1000 according to this embodiment, at least a portion of the battery module unit is omitted, thereby reducing the weight of the battery pack 1000 and increasing the battery capacity. Furthermore, in this embodiment, the cover 1200 is mounted on the upper part of the battery cell array 100, and the battery cell array 100 is not exposed to the outside, thus improving safety and ensuring sufficient structural rigidity within the battery pack 1000.

[0058] Figure 4 yes Figure 1 An exploded perspective view of the lower frame of the battery pack.

[0059] Reference Figure 1 , Figure 3 and Figure 4 In the battery pack 1000 according to an embodiment of the present disclosure, the lower frame 1100 may include a bottom 1110 that contacts the lower surface of the battery cell array 100, and frame portions 1130 and 1150 that contact at least one side of the battery cell array 100. Here, the bottom 1110 and the frame portions 1130 and 1150 may be integrated with each other, or may be fixed to each other by separate fastening methods (e.g., welding or bonding).

[0060] Here, frame portions 1130 and 1150 may be formed of thermal insulation components. For example, frame portions 1130 and 1150 may be constructed of extruded aluminum. As another example, frame portions 1130 and 1150 may be made of different metal bonding materials (e.g., clad metal), or may be structures containing insulating materials such as aerogel or EPP (expanded polypropylene) foam. However, this disclosure is not limited thereto, and frame portions 1130 and 1150 may be used without limitation as long as they are made of thermal insulation materials with a predetermined stiffness.

[0061] Furthermore, the frame portions 1130 and 1150 may include a side frame 1130 extending upward from the edge of the bottom 1110 and an inner frame 1150 located inside the side frame 1131. Here, the plurality of battery cell arrays 100 may be separated from each other by the side frame 1130 and the inner frame 1150.

[0062] More specifically, the inner frame 1150 may include a first inner frame 1151 extending along the width direction of the lower frame 1100 and a second inner frame 1155 extending along the length direction of the lower frame 1100. A pair of first inner frames 1151 may cover two sides of the battery cell array 100. Furthermore, as... Figure 3 As shown, the second inner frame 1155 and the side frame 1130 can cover the front and rear surfaces of the battery cell array 100.

[0063] Therefore, the frame portions 1130 and 1150 can cover both sides of the battery cell array 100, as well as the front and rear surfaces, thus protecting the battery cell array 100 from external impacts and ensuring the structural rigidity of the lower frame 1100. Furthermore, heat propagation between adjacent battery cell arrays 100 can be prevented, thereby preventing short circuits between battery cells 110.

[0064] In addition, refer to Figure 1 , Figure 3 and Figure 4 At least one rupture 1500 may be formed on the outer surface of the side frame 1130. Here, the rupture 1500 may be located near one end of the ventilation section 1300. In other words, the rupture 1500 is located on the outer surface of the side frame 113 that contacts the end of the second inner frame 1155, but may be located near one end of the ventilation section 1300.

[0065] Furthermore, similar to a rupture disc, the rupture portion 1500 may be connected to the ventilation portion 1300 and may include a rupture surface (not shown) configured to rupture when the pressure of the inflowing gas exceeds a certain pressure. However, the structure of the rupture portion 1500 is not limited to this; any configuration that communicates with a passage of the ventilation portion 1300 to allow exhaust to the outside can be included in this embodiment.

[0066] According to the above configuration, the ventilation section 1300 and the rupture section 1500 can be connected to each other, so that when a portion of the battery cell array 100 catches fire, heat and flames are directed to the outside and the impact between adjacent battery cell arrays 100 can be minimized.

[0067] Figure 5 It is along Figure 2 The cross-sectional view of the cover section taken by the cutting line C-C'.

[0068] Reference Figure 2 and Figure 5 The cover portion 1200 may include: a first plate 1210; a second plate 1220 located below the first plate 1210; and a side portion 1230 connecting the edge of the first plate 1210 and the edge of the second plate 1220. Here, the first plate 1210, the second plate 1220 and the side portion 1230 may be integrated with each other, or may be fixed to each other by separate fastening methods (e.g., welding or bonding).

[0069] Furthermore, a first ventilation hole 1215 may be formed in the central portion of the first plate 1210. Here, as... Figure 5 As shown, the first vent 1215 may represent a portion of the first plate 1210 that is opened in the first plate 1210 by removing a portion of the first plate 1210.

[0070] Furthermore, at least one second vent 1225 may be formed in the second plate 1220. Here, the second vent 1225 may be formed at positions adjacent to the front and rear surfaces of the battery cell array 100. More specifically, the cover 1200 may be located on the upper part of the pair of battery cell arrays 100, and the second vent 1225 may be formed respectively at positions adjacent to the front and rear surfaces of the pair of battery cell arrays 100. For example, as... Figure 5 As shown, four second vents 1225 may be formed at locations adjacent to the front and rear surfaces of a pair of battery cell arrays 100, respectively. Here, similar to the first vent 1215, the second vent 1225 may represent a portion of the second plate 1210 that is opened by removing a portion of the second plate 1220.

[0071] Therefore, in the battery pack 1000 according to this embodiment, when a fire occurs in a portion of the battery cell array 100, gas and flame flow into the cover portion 1200 through the second ventilation hole 1225 adjacent to the front and rear surfaces of the battery cell array 100, and the gas and flame flowing into the second ventilation hole 1225 can be discharged toward the ventilation portion 1300 through the first ventilation hole 1215.

[0072] Furthermore, the lower surface of the second plate 1220 can contact the upper part of the battery cell array 100. More specifically, in this embodiment, the cover 1200 contacts the upper part of the battery cell array 100 and can be secured by pressing the upper part of the battery cell array 100.

[0073] Therefore, in normal times when no fire occurs, the cover 1200 serves as a support frame for the battery cell array 100, thereby improving stability and ensuring the structural rigidity of the battery pack 1000.

[0074] Figure 6 yes Figure 1 A magnified view of region a.

[0075] Reference Figure 1 , Figure 3 and Figure 6 In the battery pack 1000 according to this embodiment, the cover 1200 and the ventilation portion 1300 can be fixed to the lower frame 1100 by the first fastening member 1270 and the second fastening member 1370.

[0076] More specifically, the first fastening member 1270 can secure a portion of the edge of the cover 1200 to the upper part of the inner frame 1150. In addition, the second fastening member 1370 can secure a portion of the edge of the ventilation section 1300 to the upper surface of the cover 1200.

[0077] As an example, the first fastening member 1270 and the second fastening member 1370 may be constituted by sealing welded bolts. As another example, the first fastening member 1270 and the second fastening member 1370 may be formed by at least one of spot welding metal joint, riveting joint, and structural sealant joint. However, the first fastening member 1270 and the second fastening member 1370 are not limited thereto, and any configuration or method that can stably fix the cover 1200 and the ventilation part 1300 to the lower frame 1100 can be included in this embodiment.

[0078] Therefore, in the battery pack 1000 according to this embodiment, the cover 1200 and the ventilation portion 1300 can be stably fixed to the lower frame 1100 by the first fastening member 1270 and the second fastening member 1370, thereby improving the structural stability of the battery pack 1000. Furthermore, the space between the cover 1200 and the ventilation portion 1300 can be sealed, so that when a portion of the battery cell array 100 catches fire, the resulting flames and gases will not leak between the cover 1200 and the ventilation portion 1300.

[0079] Figure 7 It shows along Figure 1 A cross-sectional view of the section cut by the cutting line A-A'. Figure 8 It is to enlarge and show Figure 7 A portion of the image.

[0080] Reference Figure 1 , Figure 7 and Figure 8 When the battery cell array 100 catches fire, the gas and flame generated in the battery cell array 100 can flow into the second ventilation hole 1225 adjacent to the front and rear surfaces of the battery cell array 100. In addition, the gas flowing into the second ventilation hole 1225 can move inside the cover portion 1200, and the moving gas and flame can flow into the ventilation portion 1300 through the first ventilation hole 1215.

[0081] Therefore, in the battery pack 1000 according to this embodiment, the gas and flame generated in a portion of the battery cell array 100 can be guided to the ventilation along the width direction of the battery pack 1000 through the cover 1200 and the ventilation section 1300, thereby preventing heat propagation between adjacent battery cell arrays 100.

[0082] In addition, refer to Figure 7 and Figure 8In the battery pack 1000 according to this embodiment, the ventilation portion 1300 may include a first ventilation portion 1350 extending along the length direction of the cover portion 1200 and a second ventilation portion 1310 extending in a direction perpendicular to the first ventilation portion 1350. More specifically, the second ventilation portion 1310 may extend to the upper surface of the cover portion 1200 via the center of the first ventilation hole 1215.

[0083] Therefore, in the battery pack 1000 according to this embodiment, the ventilation section 1300 can be divided by the first ventilation section 1350, thereby preventing the gas and flame flowing into the ventilation section 1300 from being transmitted between a pair of battery cell arrays 100 and causing heat propagation.

[0084] Figure 9 It shows along Figure 1 A partial cross-sectional view taken by the cutting line B-B'.

[0085] Reference Figure 1 and Figure 9 The gas and flame flowing through the ventilation section 1300 can move toward the rupture section 1500 formed on the side frame 1130, and when the pressure is greater than or equal to a predetermined value, the rupture section 1500 can rupture, so that the high-temperature gas and flame can be discharged to the outside.

[0086] Here, at least one through portion 1135 may be formed on the inner surface of the side frame 1130. Here, as... Figure 9 As shown, the through portion 1135 can communicate with one end 1315 of the ventilation portion 1300. Furthermore, a gas collection portion 1137 capable of collecting gas and flame can be formed on the inner side of the side frame 1130. For example, the gas collection portion 1137 can have dimensions corresponding to the dimensions of the rupture portion 1500.

[0087] More specifically, the gas and flame flowing into the ventilation section 1300 can move to the gas collection section 1137 through the through section 1135 communicating with one end 1315 of the ventilation section 1300. Furthermore, when the pressure of the gas and flame collected in the gas collection section 1137 is greater than or equal to a predetermined pressure, the rupture section 1500 can rupture, and the gas and flame can be discharged to the outside of the side frame 1130.

[0088] Therefore, in the battery pack 1000 according to this embodiment, the gas and flame flowing into the ventilation section 1300 through the ventilation section 1300 and the rupture section 1500 can be guided to ventilate along the length direction of the battery pack 1000, so that the gas and flame can be effectively discharged to the outside, while preventing heat transmission between adjacent battery cell arrays 100.

[0089] Another embodiment of the device according to this disclosure includes the aforementioned battery pack. Such a device can be applied to vehicle devices, such as electric bicycles, electric vehicles, or hybrid vehicles, but this disclosure is not limited thereto, and can be applied to various devices capable of using battery modules and battery packs including battery modules, which also fall within the scope of this disclosure.

[0090] Although the preferred embodiments of this disclosure have been described in detail above, the scope of this disclosure is not limited thereto, and those skilled in the art can devise many other modifications and embodiments without departing from the spirit and scope of the inventive principles described in the appended claims.

[0091] [Explanation of reference numerals in the attached figures]

[0092] 100: Battery cell array

[0093] 1000: Battery pack

[0094] 1100: Lower frame

[0095] 1200: cover

[0096] 1300: Ventilation Department

[0097] 1500: Fractured section

Claims

1. A battery pack, comprising: The lower frame has multiple battery cell arrays mounted on it; At least one cover is located on the upper part of the plurality of battery cell arrays; and A ventilation section is installed on the cover and extends along the length of the lower frame. The cover covers the upper portion of a pair of battery cell arrays arranged to face each other along the width of the lower frame. The cover portion has a first ventilation hole, and the ventilation portion covers the first ventilation hole. The lower frame includes a first inner frame extending along the width direction and a second inner frame extending along the length direction, wherein the pair of battery cell arrays are separated from each other by the second inner frame. The ventilation section includes a first ventilation section extending along the length direction of the lower frame and a second ventilation section extending from the upper part of the first ventilation section along the width direction of the lower frame to the upper surface of the cover. The ventilation section is divided by the first ventilation section to prevent gas and flame flowing into the ventilation section from being transmitted between the pair of battery cell arrays and causing heat propagation.

2. The battery pack according to claim 1, wherein the cover comprises: First board; The second plate located below the first plate; and The side portion connecting the edge of the first plate and the edge of the second plate.

3. The battery pack according to claim 2, wherein: The first ventilation hole is formed in the center of the first plate.

4. The battery pack according to claim 3, wherein: The lower surface of the second plate is in contact with the upper part of the battery cell array.

5. The battery pack according to claim 4, wherein: The second plate has at least one second ventilation hole formed in a position adjacent to the front and rear surfaces of the battery cell array.

6. The battery pack according to claim 1, wherein: The second ventilation section extends from the center of the first ventilation hole to the upper surface of the cover.

7. The battery pack according to claim 1, wherein: The lower frame includes a bottom that contacts the lower surface of the battery cell array and a frame portion that contacts at least one side of the battery cell array.

8. The battery pack according to claim 7, wherein: The frame is made of heat-insulating components.

9. The battery pack according to claim 7, wherein: The frame portion includes a side frame extending upward from the bottom edge and an inner frame located inside the side frame, the inner frame including a first inner frame and a second inner frame. The array of multiple battery cells is separated from each other by the side frame and the inner frame.

10. The battery pack according to claim 9, further comprising: The first fastening member secures a portion of the edge of the cover to the upper part of the inner frame; and The second fastening member secures a portion of the edge of the ventilation section to the upper surface of the cover.

11. The battery pack according to claim 9, wherein: At least one crack is formed on the outer surface of the side frame. The rupture is located near one end of the ventilation section.

12. The battery pack according to claim 11, wherein: At least one through portion is formed on the inner surface of the side frame. The through section is connected to one end of the ventilation section.

13. An apparatus comprising a battery pack according to claim 1.

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