Battery packs and devices containing them

Abstract

A battery pack according to one embodiment of the present invention includes a pack frame on which a plurality of battery modules are mounted, a battery disconnect unit (BDU) located inside the pack frame and electrically connected to the plurality of battery modules, and at least one foamed silicone portion located in the case of the battery disconnect unit, wherein in the high-temperature environment inside the pack frame, the foamed silicone material contained in the foamed silicone portion exposed to the high-temperature environment inside the pack frame expands toward the outside of the case.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0106184 filed on August 14, 2023, and all the contents disclosed in the literature of the Korean patent application are included as part of this specification.

[0002] 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, which include at least one foamed silicone part located in a case of a battery cutoff unit, and prevent the battery cutoff unit from being directly exposed to or contacting a high - temperature environment when a thermal runaway phenomenon occurs inside the battery pack.

Background Art

[0003] Secondary batteries, which have high applicability according to product groups and electrical characteristics such as high energy density, are widely applied not only to portable devices but also to electric vehicles or hybrid vehicles driven by an electric drive source, power storage devices, etc. Such secondary batteries are attracting attention not only for the primary advantage of significantly reducing the use of fossil fuels but also as a new energy source for environmental friendliness in that no by - products are generated by energy use and for improving energy efficiency.

[0004] Current commercially available secondary batteries include nickel - cadmium batteries, nickel - metal hydride batteries, nickel - zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries are attracting attention for the advantages of having almost no memory effect compared to nickel - based secondary batteries, being free from charge and discharge, having a very low self - discharge rate, and having a high energy density.

[0005] Generally, lithium secondary batteries can be classified into cylindrical or prismatic secondary batteries in which an electrode assembly is installed in a metal can according to the shape of the exterior material, and pouch - type secondary batteries in which an electrode assembly is installed in a pouch of an aluminum laminate sheet.

[0006] Recently, with the increasing need for large-capacity secondary battery structures, particularly for their use as energy storage sources, there has been a growing demand for medium-to-large-sized modular battery packs, which are assembled from battery modules with multiple secondary batteries connected in series or parallel. Such battery modules improve capacity and output by forming a battery cell stack through the series or parallel connection of multiple battery cells. Furthermore, multiple battery modules can be assembled together with various control and protection systems, such as a Battery Management System (BMS) and a cooling system, to form a battery pack.

[0007] In particular, the battery pack includes a Battery Disconnected Unit (BDU) installed between the power converter of the device to which the battery pack is attached and the battery module. The Battery Disconnected Unit can ensure the safety of the battery pack by cutting off the battery power supply in the event of abnormal conditions such as overcurrent, overheating, or thermal runaway.

[0008] However, in the event of abnormal situations such as the aforementioned overcurrent, overheating, or thermal runaway, a fire may occur inside the battery pack, and the battery cutoff unit case may be destroyed in an extremely high-temperature environment of over 1200 degrees Celsius, such as a fire. If the battery cutoff unit case is destroyed in this way, there is a high probability that the electrical components and busbars inside the battery cutoff unit will short-circuit with the surrounding pack structure or other electrical components. Furthermore, if an electrical short-circuit occurs between the electrical components and busbars inside the battery cutoff unit and the surrounding pack structure or other electrical components, an electrically closed circuit will be formed inside the battery pack, which can accelerate thermal propagation or thermal runaway phenomena inside the battery pack.

[0009] Consequently, there is a need to develop a battery pack that, even if an abnormal situation occurs inside the battery pack, prevents the battery cutoff unit case from being directly exposed to a high-temperature environment, thereby preventing the aforementioned electrical short-circuit phenomenon and ensuring sufficient time for the safety items inside the battery pack to operate. [Overview of the project] [Problems that the invention aims to solve]

[0010] The problem that the present invention aims to solve is to provide a battery pack and a device including the same, which includes at least one foamed silicone portion located in the case of the battery cutoff unit, thereby preventing the battery cutoff unit from being directly exposed to or coming into contact with a high-temperature environment when a thermal runaway phenomenon occurs inside the battery pack.

[0011] The problems that this invention aims to solve are not limited to those described above, and any problems not mentioned will be clearly understood by a person with ordinary skill in the art to which this invention pertains from this specification and the accompanying drawings. [Means for solving the problem]

[0012] A battery pack according to one embodiment of the present invention includes a pack frame on which a plurality of battery modules are mounted, a battery disconnect unit (BDU) located inside the pack frame and electrically connected to the plurality of battery modules, and at least one foamed silicone portion located in the case of the battery disconnect unit, wherein the foamed silicone material contained in the foamed silicone portion, exposed to the high-temperature environment inside the pack frame, expands toward the outside of the case.

[0013] The battery shut-off unit can form a silicon expansion portion that extends along the outer surface of the case as the foamed silicon material contained in the foamed silicon portion expands toward the outside of the case in the high-temperature environment inside the pack frame.

[0014] The silicon expansion portion can be located between the outer surface of the case and the pack frame, or between the outer surface of the case and the battery module.

[0015] In the above case, the at least one foamed silicone portion can be positioned adjacent to the plurality of battery modules.

[0016] In the aforementioned case, the at least one foamed silicone portion can be positioned at the top and bottom of the case, respectively.

[0017] The foamed silicone portion is formed by injecting foamed silicone material into the inside of the case, and a portion of the foamed silicone portion can be exposed on the outer surface of the case.

[0018] The foamed silicone portion may be formed in an inverted T shape in the case.

[0019] The aforementioned case can be made of plastic or aluminum.

[0020] The battery disconnection unit may include at least one relay component and a busbar that electrically connects the relay component.

[0021] The at least one foamed silicone portion can be arranged along the outer surface of the case, spaced apart from each other.

[0022] The at least one foamed silicon part can include at least one first foamed silicon part respectively arranged at the lower part of the case and at least one second foamed silicon part respectively arranged at the upper part of the case.

[0023] The battery disconnect unit can be arranged in a direction in which the at least one second foamed silicon part faces the plurality of battery modules.

[0024] The number of the at least one second foamed silicon part may be more than the number of the at least one first foamed silicon part.

[0025] A device according to another embodiment of the present invention includes the battery pack described above.

Advantages of the Invention

[0026] According to an embodiment, the present invention relates to a battery pack including at least one foamed silicon part located in a case of a battery disconnect unit, and a device including the same, and can prevent the battery disconnect unit from being directly exposed to or contacting a high-temperature environment when a thermal runaway phenomenon occurs inside the battery pack.

[0027] The advantages of the present invention are not limited to the advantages described above, and the advantages not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present invention belongs from this specification and the attached drawings.

Brief Description of the Drawings

[0028] [Figure 1] It is a cross-sectional view schematically showing a battery disconnect unit (BDU, Battery Disconnect unit) according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view showing an enlarged part of FIG. 1. [Figure 3] It is a top view schematically showing a battery pack including the battery disconnect unit of FIG. 1 in a normal state. [Figure 4] Figure 1 is a schematic top view illustrating a battery pack including a battery cutoff unit, where a thermal runaway phenomenon occurs in some battery modules. [Modes for carrying out the invention]

[0029] The following describes various embodiments of the present invention in detail, with reference to the attached drawings, so that those with ordinary skill in the art to which the present invention pertains can easily implement it. The present invention can be implemented in several different forms and is not limited to the embodiments described herein.

[0030] To clearly explain the present invention, irrelevant parts have been omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

[0031] Furthermore, the dimensions and thicknesses of each component shown in the drawings are arbitrarily indicated for the sake of explanation, and therefore the present invention is not necessarily limited to those shown. In the drawings, the thicknesses are shown enlarged to clearly represent multiple layers and regions. Also, in the drawings, the thicknesses of some layers and regions are shown exaggerated for the sake of explanation.

[0032] Furthermore, when a specification states that a part of it "includes" a certain component, unless otherwise stated, this means that it may include other components rather than excluding them.

[0033] Furthermore, throughout the specification, "on a plane" means when the subject is viewed from above, and "on a cross-section" means when the subject is viewed from the side of a cross-section cut perpendicularly into it.

[0034] The following describes a battery disconnect unit (BDU) 100 according to one embodiment of the present invention.

[0035] Figure 1 is a schematic cross-sectional view showing a battery disconnect unit (BDU) according to one embodiment of the present invention. Figure 2 is an enlarged cross-sectional view showing a portion of Figure 1.

[0036] Referring to Figures 1 and 2, a battery disconnection unit 100 according to one embodiment of the present invention may include at least one relay component 110 and a busbar 120 that electrically connects the relay component 110.

[0037] The relay component 110 may be a power relay assembly (PRA) that reliably supplies or interrupts high-voltage battery power to an external device. Here, the relay component 110 is electrically connected to the terminals of the battery pack 1000 (Figure 3) and the power transmission system of the external device, and can be controlled by a BMS (Battery Management System) or VCM (Vehicle Control Module).

[0038] The busbar 120 may be a high-voltage busbar that electrically connects adjacent relay components 110 in a high-voltage environment, or electrically connects the relay components 110 to the terminals of the battery pack 1000 (Figure 3) and / or to the power transmission system of an external device. For example, the busbar 120 may be made of an electrically conductive metal plate.

[0039] Although not shown in Figures 1 and 2, the battery cutoff unit 100 may also include a current sensor, fuse, and other components in addition to the relay component 110 and busbar 120.

[0040] The battery disconnection unit 100 includes a battery disconnection unit case 130, and the above-mentioned relay component 110 and busbar 120 can be housed inside the case 130.

[0041] The case 130 may include a lower case 131 and an upper case 135, in which internal components such as relay components 110 and busbars 120 may be mounted inside the lower case 131, and the upper case 135 may cover the internal components. For example, the lower case 131 and the upper case 135 may be fixed together by a separate fastening method such as welding or bonding.

[0042] For example, the case 130 can be made of plastic or aluminum. However, it is not limited to these materials, and the case 130 can be made of a heat-resistant or fire-resistant material that will not easily disappear in high-temperature environments such as a fire occurring inside the battery pack 1000 (Figure 3) in which the battery shut-off unit 100 is installed.

[0043] The battery cutoff unit 100 includes at least one foamed silicone portion 140 located in the case 130. The at least one foamed silicone portion 140 can be arranged along the outer surface of the case 130, spaced apart from each other.

[0044] More specifically, the foamed silicone portion 140 may include at least one first foamed silicone portion 141 and at least one second foamed silicone portion 145. Here, at least one first foamed silicone portion 141 can be disposed in the lower case 131, and at least one second foamed silicone portion 145 can be disposed in the upper case 135.

[0045] As an example, at least one foamed silicone section 140 can be placed on the lower surface of the lower case 131 and on the upper surface of the upper case 135, respectively, as shown in Figure 1. However, it is not limited to this, and unlike in Figure 1, it can also be placed on the side surfaces of the lower case 131 and the upper case 135, respectively.

[0046] The foamed silicone portion 140 is formed by injecting foamed silicone material into the case 130, and a portion of the foamed silicone portion 140 may be exposed on the outer surface of the case 130.

[0047] More specifically, the outer surface of case 130 may have a recessed area inside case 130. For example, the recessed area inside case 130 can be formed by methods such as injection molding.

[0048] A foamed silicone material can be injected into the recessed area inside the case 130 formed in this way, and the foamed silicone can be injected in an amount sufficient to be exposed on the outer surface of the case 130.

[0049] Here, when the foamed silicone portion 140 is directly exposed to high-temperature environments such as flames or fires, the foamed silicone material contained in the foamed silicone portion 140 can be ceramicized. At this time, the ceramicized foamed silicone can expand to about 4 to 5 times its original volume. Furthermore, the ceramicized foamed silicone has a relatively very low hardness, and even if its volume becomes relatively large, it can not damage other components outside the case 130.

[0050] As an example, the foamed silicone portion 140 is formed of foamed silicone containing glass fiber. Here, foamed silicone can mean a silicone composition that includes a blowing agent. However, it is not limited to this, and any material that can expand in a high-temperature environment such as a flame or fire generated inside the battery pack 1000 (Figure 3) can be applied to this embodiment.

[0051] As a result, the battery shut-off unit 100 according to this embodiment includes a foamed silicone material in the foamed silicone portion 140 formed on the case 130 that can expand in high-temperature environments, thus protecting the battery shut-off unit 100 from high-temperature environments such as flames and fires. In particular, because the hardness of the foamed silicone material expanded in the foamed silicone portion 140 is relatively low, the battery shut-off unit 100 can be safely protected without damaging other components outside the case 130.

[0052] As an example, as shown in Figures 1 and 2, the foamed silicone portion 140 can be formed in an inverted T shape within the case 130. However, it is not limited to this, and any configuration that allows the foamed silicone material to be contained inside the case 130 can be applied to this embodiment.

[0053] As a result, the battery shut-off unit 100 according to this embodiment can contain enough foamed silicone material to adequately cover the outer surface of the case 130 because the foamed silicone portion 140 has the above-described shape, and the battery shut-off unit 100 can be effectively protected from high-temperature environments such as flames and fires.

[0054] Referring to Figure 2, Figure 2(a) is a diagram showing the second foamed silicone section 145 inside the pack frame 2000 (Figure 3) under normal conditions, and Figure 2(b) is a diagram showing the second foamed silicone section 145 inside the pack frame 2000 (Figure 3) under high-temperature conditions.

[0055] Figure 2 mainly shows the upper case 135 and the second foamed silicone section 145, but the lower case 131 and the first foamed silicone section 141 can be explained similarly. For the sake of explanation, the following description will focus on the upper case 135 and the second foamed silicone section 145.

[0056] Referring to Figure 2(b), the battery cutoff unit 100 can form a silicon expansion portion 145P in which the foamed silicon material contained in the second foamed silicon portion 145 expands toward the outside of the upper case 135 in the high-temperature environment inside the pack frame 2000 (Figure 3). More specifically, the silicon expansion portion 145P can extend along the outer surface of the upper case 135.

[0057] Here, the high-temperature environment inside the pack frame 2000 (Figure 3) may be an environment in which the temperature inside the pack frame 2000 (Figure 3) rises due to phenomena such as overcurrent, overheating, or thermal runaway in the multiple battery modules 200 that are installed together inside the battery pack 1000 (Figure 3). More specifically, the high-temperature environment inside the pack frame 2000 (Figure 3) can mean an environment in which a fire occurs in a battery cell located inside the battery pack 1000 (Figure 3) through a cell event such as thermal runaway, and some of the internal components of the pack frame 2000 (Figure 3) are exposed to flames. As an example, the high-temperature environment inside the pack frame 2000 (Figure 3) may be an environment heated to a temperature of 400 degrees Celsius or higher, which is high enough to cause some of the internal components of the pack frame 2000 (Figure 3) to be destroyed by flames. In other words, the high-temperature environment inside the Packframe 2000 (Figure 3) can be described as an ultra-high temperature environment where the temperature rapidly rises to over 1200 degrees Celsius.

[0058] As a result, in this embodiment, the battery shut-off unit 100 has a foamed silicone portion 140 formed on the case 130, and a silicone expansion portion 145P is formed on the outer surface of the case 130 in the high-temperature environment inside the pack frame 2000 (Figure 3), protecting the case 130 from high-temperature environments such as a fire occurring inside the battery pack 1000 (Figure 3).

[0059] In other words, the silicon expansion portion 145P can prevent direct contact between the case 130 and the internal components of the pack frame 2000 (Figure 3), thereby preventing heat propagation phenomena due to thermal contact or electrical short circuits due to electrical contact between the case 130 and the internal components of the pack frame 2000 (Figure 3).

[0060] The following describes a battery pack 1000 according to one embodiment of the present invention.

[0061] Figure 3 is a schematic top view of a battery pack including the battery cutoff unit shown in Figure 1, illustrating the normal state. Figure 4 is a schematic top view of the battery pack including the battery cutoff unit shown in Figure 1, illustrating the case where thermal runaway occurs in some battery modules.

[0062] Referring to Figure 3, a battery pack 1000 according to one embodiment of the present invention includes a pack frame 2000 on which a plurality of battery modules 200 are mounted, and a battery disconnection unit 100 electrically connected to the plurality of battery modules 200 can be located inside the pack frame 2000.

[0063] Here, the pack frame 2000 may include a lower pack frame (not shown) on which a plurality of battery modules 200 are mounted, and an upper pack frame (not shown) located above the battery modules 200. More specifically, the upper pack frame can cover the upper part of the lower pack frame when the plurality of battery modules 200 are mounted on the lower pack frame. Here, the lower pack frame and the upper pack frame can be joined to each other by methods such as welding or bonding to seal the inside of the battery pack 1000.

[0064] For example, the pack frame 2000 can be made of an insulating material. For example, the pack frame 2000 can be made of an aluminum extruded structure. As another example, the pack frame 2000 may be made of a dissimilar metal jointing material such as clad metal, or a structure containing an insulating material such as aerogel or EPP (Expanded Polypropylenes) foam. As yet another example, the pack frame 2000 may be a structure containing materials such as silicon foam, mica, or glass fiber pads. However, it is not limited to these, and the pack frame 2000 can be used without limitation as long as it is made of an insulating material with a predetermined rigidity.

[0065] Multiple battery modules 200 can constitute a packaged battery module array 300. The arrangement of multiple battery modules 200 in the battery module array 300 is not limited to the arrangements shown in Figures 3 and 4, and various arrangements are possible depending on the shape of the pack frame 2000.

[0066] The battery module 200 includes a battery cell stack (not shown) in which a plurality of battery cells are stacked, and a module frame (not shown) that houses the battery cell stack (not shown).

[0067] The battery cell is preferably a pouch-type battery cell. For example, the battery cell can be manufactured by housing an electrode assembly in a pouch case made of a laminate sheet containing a resin layer and an intermediate layer, and then heat-sealing the pouch case. The battery cell can be formed into a rectangular sheet-type structure. The battery cell can consist of multiple cells, and the multiple battery cells can be stacked so as to be electrically connected to each other to form a battery cell stack (not shown). Here, the number of battery cells constituting the battery cell stack (not shown) can be adjusted as needed.

[0068] The module frame (not shown) may include an upper cover and a U-shaped frame. Here, the U-shaped frame may include a bottom and two side portions extending upward from both ends of the bottom. In this case, the bottom can cover the lower surface of the battery cell stack (not shown), and the side portions can cover the sides of the battery cell stack (not shown). The upper cover and the U-shaped frame can be joined by welding or other means with their corresponding corner portions in contact, forming a structure that covers the top, bottom, left, and right sides of the battery cell stack (not shown). Therefore, the upper cover and the U-shaped frame can be made of a metal material having a predetermined strength.

[0069] However, the structure of the modular frame (not shown) is not limited to this, and in other embodiments, the modular frame (not shown) may have a monoframe structure. Here, the monoframe may be in the form of a metal plate in which the top surface, bottom surface and both sides are integrated. The monoframe can be manufactured by extrusion molding. In addition to the monoframe or U-shaped frame, the modular frame (not shown) can also be provided with an L-shaped frame structure, and can be provided with various structures not described in the examples above.

[0070] The battery module 200 further includes busbar frames located on the front and rear surfaces of a battery cell stack (not shown), and end plates covering the busbar frames. Busbars (not shown) electrically connected to the battery cell stack (not shown) can be located on the busbar frames. The end plates can then physically protect the battery cell stack (not shown) and other electrical components from external impacts.

[0071] Referring to Figure 3, the battery cutoff unit 100 may be arranged such that at least one second foamed silicone portion 145 faces the plurality of battery modules 200. That is, in the case 130 of the battery cutoff unit 100, the foamed silicone portion 140 may include a first foamed silicone portion 141 located adjacent to the pack frame 2000 and a second foamed silicone portion 145 located adjacent to the plurality of battery modules 200. However, the arrangement of the battery cutoff unit 100 is not limited to this, and the reverse arrangement can also be included in this embodiment.

[0072] As a result, in the battery pack 1000 according to this embodiment, the foamed silicone portion 140 can safely protect the battery cutoff unit 100 from internal components such as the pack frame 2000 and the multiple battery modules 200.

[0073] Here, the number and spacing of the first foamed silicone section 141 and the second foamed silicone section 145 may be the same as in Figure 3, but the number and spacing can be adjusted as needed.

[0074] For example, in the case 130 of the battery cutoff unit 100, at least one foamed silicone portion 140 may be positioned adjacent to multiple battery modules 200. Although not shown in Figure 3, a relatively large number of at least one foamed silicone portion 140 may be positioned adjacent to the multiple battery modules 200. That is, the number of at least one second foamed silicone portion 145 may be greater than the number of at least one first foamed silicone portion 141.

[0075] As a result, in the battery pack 1000 according to this embodiment, the foamed silicone portion 140 is strategically placed adjacent to multiple battery modules 200 that cause a relatively large amount of high-temperature environment inside the pack frame 2000, thereby more effectively ensuring the safety of the battery cutoff unit 100.

[0076] In this embodiment, the battery pack 1000 expands outward from the case 130 when the foamed silicone portion 140 is exposed to the high-temperature environment inside the pack frame 2000 (Figure 3). Here, the foamed silicone portion 140 exposed to the high-temperature environment can mean the foamed silicone portion 140 located adjacent to a component that is causing or being heated to a high temperature inside the pack frame 2000 (Figure 3). That is, the foamed silicone portion 140 exposed to the high-temperature environment can mean the foamed silicone portion 140 located adjacent to a flame or fire point generated from a component that is causing the high-temperature environment inside the pack frame 2000 (Figure 3).

[0077] As an example, referring to Figure 4, if a cell event (CE) such as overcurrent, overheating, or thermal runaway occurs in a specific battery module 200' located adjacent to the battery cutoff unit 100, the second foamed silicone portion 145 located adjacent to the specific battery module 200' may expand outward from the case 130, forming a silicone expansion portion 145P along the outer surface of the case 130. Here, the silicone expansion portion 145P can be located between the outer surface of the upper case 135 and the specific battery module 200'.

[0078] Unlike in Figure 4, if the pack frame 2000 adjacent to the battery shut-off unit 100 is heated to a high temperature due to the high-temperature environment inside the pack frame 2000, the first foamed silicone portion 141 located adjacent to the pack frame 2000 will expand toward the outside of the case 130, and a silicone expansion portion (not shown) can be formed between the outer surface of the case 130 and the pack frame 2000.

[0079] As a result, in the battery pack 1000 according to this embodiment, the silicon expansion portion 145P can safely protect the battery cutoff unit 100 from the pack frame 2000 and / or internal components of the pack frame 2000 in the high-temperature environment inside the pack frame 2000.

[0080] In addition, the silicon expansion portion 145P prevents the case 130 from being exposed to high-temperature environments such as external flames, thereby significantly delaying the time it takes for the case 130 to disappear, and ensuring sufficient operating time for safety components such as fuses located inside the battery pack 1000.

[0081] The aforementioned battery modules and battery packs containing them can be applied to a variety of devices. Such devices include means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, but the present invention is not limited thereto and is applicable to a variety of devices that can use battery modules and battery packs containing them, and this also falls within the scope of the present invention.

[0082] 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 that utilize the basic concepts of the present invention as defined in the following claims also fall within the scope of the present invention. [Explanation of Symbols]

[0083] 100 Battery Shutdown Units 110 Relay Components 120 Bus Bar 130 cases 140 Foamed Silicone Part 200 Battery Modules 300 Multiple battery modules 1000 Battery Pack 2000 Pack Frame

Claims

1. A pack frame with multiple battery modules attached, A battery disconnection unit located inside the pack frame and electrically connected to the plurality of battery modules, At least one foamed silicone portion located in the case of the battery cutoff unit, wherein the foamed silicone material contained in the foamed silicone portion exposed to the high-temperature environment inside the pack frame expands toward the outside of the case, and A battery pack that includes this.

2. The aforementioned battery cutoff unit is The battery pack according to claim 1, wherein, in the high-temperature environment inside the pack frame, the foamed silicone material contained in the foamed silicone portion expands toward the outside of the case, forming a silicone expansion portion that extends along the outer surface of the case.

3. The battery pack according to claim 2, wherein the silicon expansion portion is located between the outer surface of the case and the pack frame, or between the outer surface of the case and the battery module.

4. The battery pack according to any one of claims 1 to 3, wherein in the case, the at least one foamed silicone portion is located adjacent to the plurality of battery modules.

5. The battery pack according to any one of claims 1 to 3, wherein the at least one foamed silicone portion is disposed at the top and bottom of the case, respectively.

6. The foamed silicone portion is formed by injecting foamed silicone material into the inside of the case. The battery pack according to any one of claims 1 to 3, wherein a portion of the foamed silicone portion is exposed on the outer surface of the case.

7. The battery pack according to claim 6, wherein the foamed silicone portion is formed in an inverted T shape in the case.

8. The battery pack according to any one of claims 1 to 3, wherein the case is made of plastic or aluminum.

9. The battery pack according to any one of claims 1 to 3, wherein the battery cutoff unit includes at least one relay component and a busbar that electrically connects the relay component.

10. The battery pack according to any one of claims 1 to 3, wherein the at least one foamed silicone portion is arranged spaced apart from each other along the outer surface of the case.

11. The battery pack according to claim 10, wherein the at least one foamed silicone portion includes at least one first foamed silicone portion disposed at the bottom of the case and at least one second foamed silicone portion disposed at the top of the case.

12. The battery pack according to claim 11, wherein the battery cutoff unit is arranged such that at least one second foamed silicon portion is positioned toward the plurality of battery modules.

13. The battery pack according to claim 12, wherein the number of at least one second foamed silicone portion is greater than the number of at least one first foamed silicone portion.

14. A device comprising a battery pack according to any one of claims 1 to 3.

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