Battery pack and device including same

Abstract

A battery pack, according to one embodiment of the present invention, comprises: battery assemblies including a plurality of battery cells; a pack frame in which the battery assemblies are accommodated and which has an open top; and a pack cover covering the open top of the pack frame, wherein the pack cover includes protrusions protruding toward the battery assemblies, and the distance between the protrusions and the battery assemblies is the same.

Description

Battery pack and device including the same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0139165 dated October 14, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] The present invention relates to a battery pack and a device including the same, and more specifically, to a battery pack and a device including the same in which venting performance is improved and mass producibility is improved even when the height of the battery assembly is not uniform.

[0004] In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras has become commonplace, the development of technologies related to such mobile devices is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing.

[0005] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0006] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte.

[0007] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0008] In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, a battery assembly in which multiple battery cells are electrically connected is used. In such a battery assembly, capacity and output are improved by connecting multiple battery cells in series or parallel to form a battery cell stack. In addition, one or more battery assemblies can be mounted together with various control and protection systems, such as a Battery Disconnect Unit (BDU), a Battery Management System (BMS), and a cooling system, to form a battery assembly.

[0009] FIG. 1 is a perspective view showing a conventional battery pack (1). FIG. 2 is an exploded perspective view showing the conventional battery pack (1) of FIG. 1. FIG. 3 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of FIG. 1.

[0010] Referring to FIGS. 1 to 3, a conventional battery pack (1) includes a pack frame (3) that houses the battery pack (1), and the pack frame (3) serves to protect the battery cell (5) and protect the battery cell (5) from external shocks or vibrations. However, the internal structure of the pack frame (3) has an uneven height, so there was a problem in that the gap between the upper part of the battery pack (1) and the pack cover (2) was formed differently in different parts. Accordingly, when the battery pack (1) expands, the venting passage narrows, making it difficult to smoothly discharge gas or particles, and as a result, the thermal protection performance (TP) could be reduced.

[0011] Conventional spacers (6a, 6b) were used to maintain a gap between the battery pack (1) and the pack cover (2), but because the height of the battery pack (1) was not uniform in different parts due to its structure, spacers (6a, 6b) of different heights had to be manufactured separately for each part. Specifically, the heights of the first spacer (6a) and the second spacer (6b) in FIG. 3 are different from each other. Since spacers (6a, 6b) of various heights had to be used to match the height of each part, parts management became complicated and production costs increased. In particular, if the heights of the spacers (6a, 6b) were different, it was difficult to maintain an accurate gap during assembly, and there was a possibility that thermal protection performance would be degraded because the venting channel was not effectively secured.

[0012] In addition, there may be cases where the fireproof sheet installed on the inside of the pack cover (2) sags or deforms, obstructing the discharge of gas. This problem can hinder the smooth discharge of gas or particles when the battery pack (1) expands, thereby degrading the performance of the battery pack (1) during thermal protection events.

[0013] To solve the problems of the prior art, the present invention forms a certain protrusion on the pack cover and applies a spacer of the same height to maintain a constant gap between the battery assembly and the pack cover, thereby providing a structure that can secure a stable venting path despite the height difference of the pack structure.

[0014] The problem that the present invention aims to solve is to provide a spacer that stably secures a venting channel to effectively discharge gases and particles even when the height of the battery assembly structure is not uniform; specifically, it solves the existing problem of having to manufacture the height of the spacer differently depending on the height of the battery assembly, and provides a battery pack and a device including the same with improved production efficiency and mass producibility through a spacer of the same shape.

[0015] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0016] A battery pack according to one embodiment of the present invention comprises: battery assemblies including a plurality of battery cells; a pack frame having an open top and housing the battery assemblies; and a pack cover covering the open top of the pack frame, wherein the pack cover includes a projection protruding toward the battery assemblies, and the distance between the projection and the battery assemblies is the same.

[0017] A spacer that contacts the protrusion may be located on the top of the battery assemblies corresponding to the protrusion.

[0018] The battery assembly may include a frame that covers at least some of the battery cells.

[0019] The above battery assembly may be in a form in which the battery cells are stored in the pack frame in a stacked state.

[0020] All of the above spacers can have the same height.

[0021] The above battery assemblies include a first battery assembly and a second battery assembly; a first distance, which is the distance between the first battery assembly and the pack cover, and a second distance, which is the distance between the second battery assembly and the pack cover, may be different from each other.

[0022] It may further include a fireproof sheet attached to the bottom of the above pack cover.

[0023] The above-mentioned protrusions may be provided in multiple numbers.

[0024] Gas or particles emitted from the battery assembly can be discharged to the outside through the space between the battery assembly and the pack cover.

[0025] According to another embodiment of the present invention, a device comprising at least one battery pack is provided.

[0026] According to embodiments of the present invention, by applying spacers of the same shape to ensure a consistent venting path even in a structure where the height of the battery assembly is not uniform, the gap between the battery assembly and the pack cover can be effectively maintained. This allows for the smooth discharge of gas or particles. Furthermore, by including protrusions on the pack cover, spacers of the same height can be applied in all areas, thereby improving productivity and mass production capabilities.

[0027] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0028] FIG. 1 is a perspective view showing a conventional battery pack.

[0029] FIG. 2 is an exploded perspective view showing a conventional battery pack of FIG. 1.

[0030] Figure 3 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 1.

[0031] FIG. 4 is a perspective view showing a battery pack according to one embodiment of the present invention.

[0032] Fig. 5 is an exploded perspective view showing the battery pack of Fig. 4.

[0033] FIG. 6 is an exploded perspective view showing the components of a battery assembly included in the battery pack of FIG. 4.

[0034] Figure 7 is a cross-sectional view showing a cross-section cut along the cutting line B-B' of Figure 4.

[0035] FIG. 8 is a cross-sectional view showing a battery pack according to another embodiment of the present invention.

[0036] Figure 9 is a partial drawing showing an enlarged view of section “C” of Figure 8.

[0037] FIG. 10 is a cross-sectional view showing a battery pack according to another embodiment of the present invention.

[0038] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0039] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0040] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0041] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" another part, this includes not only the case where it is "directly above" the 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 between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" facing the opposite direction of gravity.

[0042] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0043] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0044] FIG. 4 is a perspective view showing a battery pack (100) according to an embodiment of the present invention. FIG. 5 is an exploded perspective view showing the battery pack (100) of FIG. 4. FIG. 6 is an exploded perspective view showing the components of a battery assembly (110) included in the battery pack (100) of FIG. 4. FIG. 7 is a cross-sectional view showing a cross-section cut along the cutting line B-B' of FIG. 4.

[0045] Referring to FIGS. 4 to 7, a battery pack (100) according to one embodiment of the present invention comprises: battery assemblies (110) including a plurality of battery cells (111); a pack frame (120) in which the battery assemblies (110) are housed and which has an open top; and a pack cover (130) that covers the open top of the pack frame (120). The pack cover (130) includes a projection (131) protruding toward the battery assemblies (110), and the gap between the projection (131) and the battery assemblies (110) is equal.

[0046] The battery pack (100) according to the present embodiment may include a plurality of battery cells (111). The battery cell (111) according to the present embodiment may be of various types of battery cells, for example, a pouch-type battery cell, a prismatic battery cell, or a cylindrical battery cell. For example, as shown in FIG. 6, the battery cell (111) according to the present embodiment may be a pouch-type battery cell. Although the following description focuses on a pouch-type battery cell, the battery cell (111) according to the present embodiment is not limited thereto, and various types of battery cells (111) may be applied.

[0047] The pack frame (120) according to the present embodiment may include a bottom frame on which at least one battery assembly (110) is placed and a side frame extending along the edge of the bottom frame. This side frame may extend in a direction perpendicular to one side of the bottom frame. By the bottom frame and the side frame, an internal space with an open top is provided, and at least one battery assembly (110) may be housed in this internal space.

[0048] The pack cover (130) according to the present embodiment can cover the open upper portion of the pack frame (120). The pack cover (130) may be made of a durable, high-strength plastic or metal material. The pack cover (130) may be designed with a structure that does not deform even with the expansion and contraction of the battery cell (111).

[0049] The protrusion (131) according to the present embodiment may come into contact with the top of the battery assembly (110). In this case, the protrusion (131) can apply a constant pressure to the top of the battery assembly (110) to prevent the position of the battery cell (111) from changing. That is, the protrusion (131) can fix the battery assembly (110) to prevent external shocks from being transmitted to the battery cell (111). As a result, the protrusion (131) can maintain the structural consistency of the battery assembly (110) even against external shocks or vibrations.

[0050] The protrusion (131) can be made of a durable, high-strength plastic or metal material. The protrusion (131) can be designed with a structure that does not deform even with the expansion and contraction of the battery assembly (110).

[0051] The space between the battery assembly (110) and the pack cover (130) can be utilized as a venting channel through which high-temperature gas and particles generated from the battery assembly (110) move when an event such as thermal runaway occurs. At this time, the gap between the battery assemblies (110) and the protrusions (131) can be set equally across all battery assemblies (110). Through this, a stable venting channel can be secured between the battery assembly (110) and the pack cover (130). Therefore, gas or particles can be smoothly discharged when an event such as thermal runaway occurs in the battery assembly (110), and the thermal management performance of the battery pack (100) can be improved.

[0052] The busbar frame assembly (160) according to the present embodiment can cover battery cells (111) by being located on the open first side (X-axis direction of FIG. 6) and second side (-X-axis direction of FIG. 6) of the frame (112) to be described later. The busbar frame assembly (160) can electrically connect the battery cells (111) in series or in parallel.

[0053] The end plate (170) according to the present embodiment can cover an open side of the frame (112) to be described later. The end plate (170) can be located on the front or rear of the frame (112). The end plate (170) can be formed on the outer edge of the busbar frame assembly (160) to cover the battery cell (111) and the busbar frame assembly (160). The end plate (170) can protect the busbar frame assembly (160) and various electrical components connected thereto from external impact. The end plate (170) can be joined to the frame (112) through welding.

[0054] Referring again to FIG. 6, the battery assembly (110) may include a frame (112) that covers at least some of the battery cells (111).

[0055] The frame (112) according to the present embodiment can protect the battery cell (111) from external shock or vibration while maintaining the structural stability of the entire battery assembly (110). The frame (112) may have a structure that partially wraps the top, bottom, or side of the battery cell (111). The frame (112) can protect the battery cells (111) from the external environment while maintaining a constant spacing between the battery cells (111) within the battery assembly (110). That is, when an external shock or vibration is applied to the battery assembly (110), the frame (112) can absorb it to prevent direct damage to the battery cell (111). The frame (112) may be made of aluminum, high-strength plastic, or a composite material.

[0056] Referring again to FIG. 6, the battery assembly (110) may be in the form of battery cells (111) stacked and housed in a pack frame (120).

[0057] Multiple battery cells (111) may be provided within the pack frame (120). For example, multiple battery cells (111) may be stacked along one direction to form a battery cell stack (113) so that they can be electrically connected to each other. Space efficiency can be maximized by housing the battery cells (111) in a stacked state within the frame (112). As the battery cells (111) are stably arranged in a stacked state, movement between the battery cells (111) is suppressed, thereby preventing damage caused by external shock or vibration.

[0058] The pack frame (120) can stably secure the stacked battery cells (111) to prevent displacement caused by external shock or vibration. This allows for reduced damage to the battery cells (111) and maintains the structural consistency of the battery assembly (110). Specifically, the stacked battery cells (111) are secured in fixed positions within the pack frame (120), thereby protecting the battery cells (111) from shaking or moving within the storage space. The bottom frame and side frame of the pack frame (120) can support the battery assembly (110).

[0059] FIG. 8 is a cross-sectional view showing a battery pack (100) according to another embodiment of the present invention.

[0060] Referring to FIGS. 4 to 6 and FIG. 8, a spacer (140) that contacts the protrusion (131) may be positioned on the top of the battery assemblies (110) corresponding to the protrusion (131).

[0061] The spacer (140) according to the present embodiment can serve to adjust the gap between the protrusion (131) and the battery assembly (110). Specifically, the spacer (140) is positioned at the top of the battery assembly (110) and can come into contact with the protrusion (131) of the pack cover (130). Through this, it can absorb shock when the battery assembly (110) expands or contracts. In addition, the spacer (140) can serve to prevent deformation of the battery assembly (110). The spacer (140) relieves pressure generated when the battery assembly (110) expands, thereby preventing damage to the structure of the battery assembly (110) and suppressing physical deformation of the battery cell (111). Furthermore, the spacer (140) can help maintain the stability of the battery assembly (110) so that the battery cell stack (113) remains fixed without shaking even under external shocks or vibrations.

[0062] Since the spacer (140) is in contact with the protrusion (131) of the pack cover (130), the gap between the battery assembly (110) and the pack cover (130) can be maintained. Through this, the gas discharge path inside the battery pack (100) can be kept from being blocked. In other words, the spacer (140) can provide the effect of stably securing the venting path. Therefore, in the event of an event such as thermal runaway, high-temperature gas and particles can be smoothly discharged to the outside through the path between the battery assembly (110) and the pack cover (130).

[0063] The spacer (140) may be made of a silicone, polyurethane, or high-strength plastic material that has high heat resistance and durability. These materials can protect the battery assembly (110) while maintaining their shape even under thermal changes. The thickness of the spacer (140) may be varied to suit the size and expansion characteristics of the battery assembly (110).

[0064] Referring again to FIGS. 4 through 6 and FIG. 8, the spacers (140) can all have the same height. By using spacers (140) of the same height, production efficiency can be increased. In conventional technology, the height of the battery assembly (110) is not uniform, so spacers (6a, 6b, see FIG. 2) of different heights had to be manufactured separately for each part. However, in the present invention, spacers (140) of the same shape can be applied regardless of the height of the battery assembly (110). That is, a protrusion (131) is provided on the pack cover (130) to allow the application of spacers (140) of the same shape. Therefore, by using spacers (140) of the same shape, parts management can be simplified and the assembly process can be simplified. In addition, assembly time and production costs are reduced, and mass production of the battery assembly (110) can be facilitated. In other words, since the same parts can be used without the need to individually adjust the spacers (140) for each battery assembly (110), the assembly speed can be increased and productivity can be improved.

[0065] Figure 9 is a partial drawing showing an enlarged view of section “C” of Figure 8.

[0066] Referring to FIGS. 4 to 6, FIGS. 8, and FIGS. 9, the battery assemblies (110) include a first battery assembly (110a) and a second battery assembly (110b); a first distance (d1), which is the distance between the first battery assembly (110a) and the pack cover (130), and a second distance (d2), which is the distance between the second battery assembly (110b) and the pack cover (130), may be different from each other.

[0067] The distance between the first battery assembly (110a) and the pack cover (130) can be defined as a first distance (d1), and the distance between the second battery assembly (110b) and the pack cover (130) can be defined as a second distance (d2). The first distance (d1), which is the distance between the first battery assembly (110a) and the pack cover (130), and the second distance (d2), which is the distance between the second battery assembly (110b) and the pack cover (130), can be adjusted differently according to the characteristics of the battery assembly (110). Through this, the design freedom of the battery assembly (110) can be greatly improved. Specifically, the first distance (d1) and the second distance (d2) can be optimized by considering the size, expansion characteristics, and thermal management needs of each battery assembly (110). For example, assuming that the pack frame (120) has a flat shape, if the height of the first battery assembly (110a) (length corresponding to the Z-axis direction in FIG. 9) is greater than the height of the second battery assembly (110b) (length corresponding to the Z-axis direction in FIG. 9), the first distance (d1) may be smaller than the second distance (d2). Alternatively, depending on the shape of the pack frame (120), even if the first battery assembly (110a) and the second battery assembly (110b) have the same height (length corresponding to the Z-axis direction in FIG. 9), the first distance (d1) and the second distance (d2) may be different from each other. For example, if the height of the pack frame area where the first battery assembly (110a) is placed is higher than the height of the pack frame area where the second battery assembly (110b) is placed, the first distance (d1) may be smaller than the second distance (d2) even if the first battery assembly (110a) and the second battery assembly (110b) have the same height (length corresponding to the Z-axis direction of FIG. 9).

[0068] As described above, the spacer (140) can play an important role in ensuring consistency of the venting path by maintaining a constant gap between the battery assembly (110) and the pack cover (130). In the case of the prior art, when the first distance between the first battery assembly and the pack cover and the second distance between the second battery assembly and the pack cover are different from each other, spacers of different heights (6a, 6b, see FIG. 2) are applied. In contrast, in the present embodiment, by providing a protrusion (131) on the pack cover (130), it is possible to apply a spacer (140) of the same shape. By applying a spacer (140) of the same shape, the gap between the battery assembly (110) and the pack cover (130) can be effectively maintained even in a structure where the height of the battery assembly (110) is not constant. Additionally, a protrusion (131) is formed on the pack cover (130), and a spacer (140) that contacts the protrusion (131) is positioned so that a consistent spacing can be maintained regardless of the height of the battery assembly (110). Through this, the venting path can be stably maintained without being blocked.

[0069] FIG. 10 is a cross-sectional view showing a battery pack (100) according to another embodiment of the present invention. Specifically, FIG. 10 is a partial view showing an enlarged view of the “C” portion of FIG. 8.

[0070] Referring to FIGS. 4 to 6, FIGS. 8, and FIG. 10, a fireproof sheet (150) attached to the bottom of the pack cover (130) may be further included.

[0071] The fireproof sheet (150) according to the present embodiment can serve to protect the pack cover (130) from thermal hazards, such as high temperature or fire, that may occur inside the battery assembly (110). The fireproof sheet (150) can be positioned between the pack cover (130) and the battery assembly (110). Specifically, the fireproof sheet (150) forms a buffer layer between the battery assembly (110) and the pack cover (130) to suppress the rise in temperature inside the battery assembly (110) in the event of ignition or overheating of the battery cell (111). In addition, the fireproof sheet (150) can prevent high-temperature gas or particles generated inside the battery assembly (110) from leaking out through the pack cover (130).

[0072] The fireproof sheet (150) can be made of a material with excellent heat resistance and durability. For example, the fireproof sheet (150) can be made of aluminum foil, ceramic fiber, or a special synthetic material that is resistant to high temperatures. This fireproof sheet (150) maintains its shape even at high temperatures and prevents heat generated from the battery cell (111) from being directly transferred to the pack cover (130), thereby improving the stability of the battery pack (100).

[0073] A spacer (140) can be positioned between the fireproof sheet (150) and the battery assembly (110). The spacer (140) can prevent the fireproof sheet (150) from sagging. When the fireproof sheet (150) is attached to the bottom of the pack cover (130), problems may arise where it may sag or deform due to gravity or vibration. The spacer (140) prevents such sagging of the fireproof sheet (150) and supports the fireproof sheet (150) so that it can maintain its position stably. As described above, the space between the battery assembly (110) and the pack cover (130) can be utilized as a venting channel through which high-temperature gases and particles generated from the battery assembly (110) move in the event of an event such as thermal runaway. By the spacer (140), the gap between the battery assembly (110) and the pack cover (130) is maintained at a constant level, and the venting channel can be stably secured without being blocked. Therefore, the thermal protection performance of the battery assembly (110) can be improved, and gas and particles can be smoothly discharged to the outside even in dangerous situations such as thermal runaway.

[0074] Referring again to FIGS. 4 to 7, the protrusions (131) can be provided in multiple numbers.

[0075] According to the present embodiment, the protrusions (131) can be arranged at regular intervals at specific locations on the pack cover (130). By distributing a plurality of protrusions (131) at various locations on the pack cover (130), the contact between the battery assembly (110) and the pack cover (130) can be maintained more stably, and the support force of the pack cover (130) can be improved. In addition, the plurality of protrusions (131) can prevent the battery assembly (110) from moving out of position or shaking. Through this, the battery assembly (110) can be protected from external shocks or vibrations, and the spacing between the battery cells (111) can be maintained at a constant level, thereby increasing structural stability.

[0076] By providing a plurality of protrusions (131), a consistent venting path can be secured between the pack cover (130) and the battery assembly (110). Accordingly, a path can be provided through which gas or particles generated during the expansion of the battery assembly (110) can be smoothly discharged, and the venting path can be maintained stably without becoming blocked.

[0077] According to another embodiment of the present invention, a device comprising at least one battery pack (100) is provided.

[0078] One or more battery packs (100) according to the embodiment described above may be mounted together with various control and protection systems, such as a Battery Management System (BMS), a Battery Disconnect Unit (BDU), and a cooling system, to form a battery pack (100). The battery pack (100) can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrids, but is not limited thereto and can be applied to various devices capable of using secondary batteries.

[0079] In this embodiment, terms indicating directions such as front, back, left, right, up, and down have been used; however, these terms are for convenience of explanation only and may vary depending on the location of the object or the observer.

[0080] Although 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 by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

[0081] Explanation of the symbols

[0082] 100: Battery pack

[0083] 110: Battery Assembly

[0084] 111: Battery cell

[0085] 112: Frame

[0086] 113: Battery cell laminate

[0087] 120: Pack Frame

[0088] 130: Pack Cover

[0089] 131: Protrusion

[0090] 140: Spacer

[0091] 150: Fireproof sheet

Claims

1. Battery assemblies comprising a plurality of battery cells; A pack frame in which the above battery assemblies are housed and which has an open top; A pack cover covering the open upper portion of the above pack frame; comprising, The above pack cover includes a projection protruding toward the battery assemblies, and A battery pack having the same spacing between the above-mentioned protrusions and the above-mentioned battery assemblies.

2. In Paragraph 1, The above battery assembly is a battery pack comprising a frame that covers at least a portion of the battery cells.

3. In Paragraph 1, The above battery assembly is a battery pack in which the battery cells are stored in the pack frame in a stacked state.

4. In Paragraph 1, A battery pack having a spacer in contact with the protrusion located on the top of the battery assemblies corresponding to the protrusion.

5. In Paragraph 4, A battery pack in which all of the above spacers have the same height.

6. In Paragraph 1, The above battery assemblies include a first battery assembly and a second battery assembly; A first distance, which is the gap between the first battery assembly and the pack cover, and A battery pack having a second distance between the second battery assembly and the pack cover that is different from each other.

7. In Paragraph 1, A battery pack further comprising a fireproof sheet attached to the bottom of the pack cover.

8. In Paragraph 1, A battery pack having multiple protrusions.

9. In Paragraph 1, A battery pack in which gas or particles emitted from the battery assembly are discharged to the outside through the space between the battery assembly and the pack cover.

10. A device comprising a battery pack according to paragraph 1.

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