Battery pack

Abstract

The present invention relates to a battery pack capable of efficiently cooling and extinguishing a fire without reducing the space utilization rate. The battery pack according to the present invention comprises: a battery module including a plurality of secondary batteries; a case that accommodates the plurality of battery modules; a cover, which is connected to the housing; at least one cooling block provided inside the cover and in contact with the case so as to cool the battery module; and a cooling pipe coupled to the cooling block and through which a coolant moves, in which the cooling block includes a fire extinguishing liquid disposed in a space defined therein, and the fire extinguishing liquid can be moved to the inside of the cooling pipe at a preset temperature or higher so as to be discharged to the outside of the cooling pipe.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2023-0035866, filed on March 20, 2023, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present invention relates to a battery pack, and more particularly, to a battery pack including one or more chargeable and dischargeable secondary batteries. Background Art

[0004] In recent years, energy prices have risen due to the depletion of fossil fuels, concerns about environmental pollution have intensified, and the demand for environmentally friendly alternative energy sources is becoming an indispensable factor in future life. As a result, research into various power generation technologies such as solar power generation, wind power generation, and tidal power generation has continued, and power storage devices such as batteries that can more efficiently use the generated electricity have also attracted attention.

[0005] In addition, as the technology and demand for electronic mobile devices and electric vehicles using batteries have developed and increased, the demand for batteries as energy sources has rapidly increased. Therefore, many studies have been conducted on batteries that can meet various needs.

[0006] Batteries that store electrical energy are generally categorized as primary batteries and secondary batteries. Primary batteries are disposable, consumable batteries. Secondary batteries, on the other hand, are rechargeable batteries made from materials that undergo a repeated oxidation and reduction process between an electric current and the material. In other words, when an electric current is passed through the material, the material is charged. When an electric current is passed through the material, the material is oxidized, and discharged. This repeated charge-discharge cycle generates electricity.

[0007] Secondary batteries can be classified into cylindrical cells, pouch cells, and prismatic cells according to their shapes. Among them, the pouch cell may include an electrode assembly in which a positive electrode, a negative electrode, and a separator are stacked in a pouch.

[0008] Multiple secondary batteries can be housed in a frame to form a battery module. Furthermore, multiple battery modules can be assembled to form a battery pack. Recently, with the increasing demand for high-capacity batteries, there is a growing demand for battery packs that combine multiple secondary cells or modules for use as energy storage sources.

[0009] Since a battery pack is made of multiple battery modules that are densely arranged in a narrow space, a large amount of heat may be generated in each battery module, and the heat may cause a flame in the battery module. In addition, the flame may spread to the outside of the battery pack.

[0010] Therefore, a configuration capable of lowering the internal temperature of the battery pack that generates a large amount of heat and a configuration capable of performing a function of a fire extinguisher in the event of a fire may be required.

[0011] Battery packs according to the prior art use a separate fire extinguishing device, which reduces the space utilization of the battery pack and requires a separate space, reducing the battery pack's energy capacity. Furthermore, there is the problem that the entire space inside the battery pack cannot be protected from fire. Furthermore, if a fire occurs in the battery pack, the spread of the fire may not be sufficiently delayed.

[0012] Therefore, there is a need for a battery pack that can efficiently cool and extinguish fire without reducing space utilization. Summary of the Invention

[0013] Technical issues

[0014] An object of the present invention is to provide a battery pack capable of efficiently performing cooling and fire extinguishing operations without reducing space utilization.

[0015] Technical Solution

[0016] According to a battery pack of the present invention, the battery pack may include: a battery module, the battery module including a plurality of secondary batteries; a shell, accommodating a plurality of battery modules in the shell; a cover, the cover being connected to the shell; one or more cooling blocks, the one or more cooling blocks being arranged inside the cover and in contact with the shell to cool the battery modules; and a cooling pipe, the cooling pipe being connected to the cooling block and through which a coolant moves, wherein each of the cooling blocks may include a fire extinguishing liquid arranged in a space defined therein, and the fire extinguishing liquid may move into the cooling pipe at a preset temperature or higher and be discharged to the outside of the cooling pipe.

[0017] The cooling block may further include a connecting portion provided between the fire extinguishing fluid and the cooling pipe.

[0018] The connection portion may prevent the fire extinguishing fluid from being discharged to the cooling pipe at a temperature lower than the preset temperature, and a channel is provided in the connection portion so that the fire extinguishing fluid is discharged toward the cooling pipe at the preset temperature or higher.

[0019] The connection portion may include refractory silicon.

[0020] The refractory silicon is ceramized at the preset temperature or higher to define a gap therein, and the fire extinguishing fluid may move into the cooling pipe through the gap.

[0021] The cooling tube may comprise refractory silicon.

[0022] The refractory silicon is ceramized at the preset temperature or higher to define gaps in a surface thereof, and the fire extinguishing fluid may be discharged to the outside of the cooling pipe through the gaps.

[0023] The location at which the cooling block is coupled to the cover may vary.

[0024] One or more block coupling grooves to which the cooling block is coupled may be defined in the cover.

[0025] The block coupling groove may be defined by a first partition wall protruding upward from the bottom of the cover and a second partition wall protruding upward to intersect with the first partition wall.

[0026] The first partition wall may be disposed perpendicular to the second partition wall.

[0027] The first partition wall and the second partition wall are each provided in plural, and the first partition wall and the second partition wall intersect each other to define a plurality of block coupling grooves, and the cooling block may be coupled to one or more of the plurality of block coupling grooves.

[0028] The cooling pipe may include a first pipe portion disposed outside the cooling block; and a second pipe portion extending from the first pipe portion and disposed inside the cooling block.

[0029] In the second pipe portion, the coolant may be introduced from the first pipe portion into the second pipe portion through one end of the second pipe portion, and the coolant may be discharged to the first pipe portion through the other end of the second pipe portion.

[0030] The second tube portion may have a partially bent shape between the one end and the other end.

[0031] The fire extinguishing fluid may move into the second pipe portion at the preset temperature or higher.

[0032] Beneficial effects

[0033] A battery pack according to the present invention may include: a battery module, the battery module including a plurality of secondary batteries; a shell, accommodating a plurality of battery modules in the shell; a cover, the cover being connected to the shell; one or more cooling blocks, the one or more cooling blocks being arranged inside the cover and in contact with the shell to cool the battery modules; and a cooling pipe, the cooling pipe being connected to the cooling block and through which a coolant moves, wherein each of the cooling blocks may include a fire extinguishing liquid arranged in a space defined therein, and the fire extinguishing liquid may move into the cooling pipe at a preset temperature or higher and be discharged to the outside of the cooling pipe.

[0034] Therefore, the heat of the battery pack can be reduced without reducing the space utilization of the battery pack.

[0035] Furthermore, in the event of a fire, the spread of the fire can be efficiently delayed or prevented.

[0036] Furthermore, cooling blocks may be provided at various locations to manage the entire space within the battery pack from fire.

[0037] Therefore, the stability of the battery pack can be improved.

[0038] The effects of the present invention are not limited to the foregoing description, and therefore, more varied effects are involved in this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic perspective view of a battery pack according to an embodiment of the present invention.

[0040] Figure 2 is a schematic exploded perspective view of a battery pack according to an embodiment of the present invention.

[0041] Figure 3 It is along Figure 1 Schematic cross-sectional view taken along line AA'.

[0042] Figure 4 is a schematic enlarged perspective view showing a cooling block and a cooling pipe of a battery pack according to an embodiment of the present invention.

[0043] Figure 5 is a schematic diagram illustrating a state in which a fire extinguishing fluid is discharged from a cooling block of a battery pack according to an embodiment of the present invention.

[0044] Figure 6 is a schematic perspective view illustrating a cover of a battery pack according to an embodiment of the present invention.

[0045] Figure 7 is a schematic enlarged perspective view of a cooling block and a cooling pipe of a battery pack according to another embodiment of the present invention. DETAILED DESCRIPTION

[0046] Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention can be implemented in several different forms and is not limited or restricted by the following examples.

[0047] In order to clearly explain the present invention, parts that are not related to the description or detailed descriptions of related known technologies that may unnecessarily obscure the main points of the present invention are omitted, and in this specification, reference numerals are added to the components in each drawing. In this case, the same or similar reference numerals are assigned to the same or similar elements throughout the specification.

[0048] Furthermore, the terms or words used in the present specification and claims should not be restrictively interpreted as ordinary meanings or dictionary-based meanings, but should be interpreted as meanings and concepts consistent with the scope of the present invention based on the principle that the inventor can appropriately define the concepts of the terms in order to best describe and explain his or her invention.

[0049] Figure 1 is a schematic perspective view of a battery pack 10 according to an embodiment of the present invention, and Figure 2 is a schematic exploded perspective view of a battery pack 10 according to an embodiment of the present invention.

[0050] The battery pack 10 according to an embodiment of the present invention may include a plurality of battery modules 100 therein. That is, the battery pack 10 may be provided by assembling one or more battery modules 100 including a plurality of secondary batteries to provide a large amount of electric energy. The battery module 100 may include a plurality of secondary batteries. Here, each secondary battery may be a pouch-type battery cell, a cylindrical battery cell, a prismatic battery cell, or the like. A battery pack may be provided by assembling a plurality of secondary batteries.

[0051] The battery pack 10 may include a housing 200 as a configuration for accommodating a plurality of battery modules 100. The housing 200 may surround the entire battery module 100 to protect the battery module 100 from external vibration or impact. The housing 200 may vary depending on the location where the battery module 100 is provided, the types of other components provided in the battery pack 10, etc. However, in one embodiment of the present invention, the housing 200 having a substantially rectangular parallelepiped shape will be described as an example.

[0052] refer to Figure 1 , a plurality of battery modules 100 may be housed inside the housing 200. For the efficiency of the manufacturing process of the battery pack 10, the housing 200 may include an upper housing and a lower housing. Therefore, the arrangement of the battery modules 100 and the assembly of the housing 200 may be performed more efficiently. Figure 1 and Figure 2 The upper housing will be omitted.

[0053] The battery pack 10 according to the embodiment of the present invention may further include a cooling pipe 500 , a cooling block 400 , and a cover 300 as examples of a configuration for cooling and extinguishing fire.

[0054] refer to Figure 1 and Figure 2 , the cover 300 may be disposed below the housing 200, and the cooling block 400 may be disposed inside the cover 300. Specifically, the cover 300 may be coupled to the lower portion of the housing 200, and the cooling block 400 may be disposed inside the cover 300 in a state of contact with the housing 200 to cool the battery module 100 accommodated in the housing 200. In addition, the cooling pipe 500 may be coupled to the cooling block 400, so that the cooling block 400 exerts a cooling effect.

[0055] The battery pack 10 that generates a large amount of heat may require a cooling device to remove the heat. Therefore, according to an embodiment of the present invention, a coolant may move within the cooling pipe 500 of the battery pack 10.

[0056] The cooling pipe 500 may have a generally tubular shape so that the coolant easily moves. Here, the cooling pipe 500 may have a partially bent shape to be efficiently coupled to the cooling block 400.

[0057] Here, the coolant flowing in the cooling pipe 500 may be a material having fluidity to perform a cooling operation for cooling heat. For example, the coolant may be cooling water.

[0058] In the battery pack 10 according to the embodiment of the present invention, the cooling block 400 can exert a cooling effect as the coolant flows inside the cooling pipe 500 connected to the cooling block 400. In addition, the cooling block 400 connected to the cooling pipe 500 can be provided to contact the housing 200 accommodating the battery module 100, thereby cooling the battery module 100.

[0059] If a fire occurs due to a large amount of heat, the battery pack 10 may need a configuration for preventing the fire from spreading. Therefore, the cooling block 400 of the battery pack 10 according to the embodiment of the present invention may include a fire extinguishing fluid 410.

[0060] The cooling block 400 may define an empty space inside to accommodate the fire extinguishing fluid 410. The fire extinguishing fluid 410 accommodated in the internal space of the cooling block 400 may be moved to the cooling pipe 500 at a preset temperature or higher and then discharged to the outside of the cooling pipe 500. Here, the preset temperature may refer to a temperature at which there is a risk of problems occurring in the functions of the battery pack 10 due to a fire.

[0061] In the battery pack 10 according to the embodiment of the present invention, the cooling block 400 may include the fire extinguishing fluid 410 , and thus, the cooling block 400 , which generally performs a cooling role, may also have a fire extinguishing function in the event of a fire.

[0062] Hereinafter, the structures of the cooling block 400 and the cooling pipe 500 will be described in more detail.

[0063] Figure 3 It is along Figure 1 A schematic cross-sectional view taken along line AA', and Figure 4 is a schematic enlarged perspective view illustrating a cooling block 400 and a cooling pipe 500 of a battery pack 10 according to an embodiment of the present invention.

[0064] refer to Figure 3 and Figure 4 The cooling block 400 may further include a connecting portion 420 disposed between the cooling pipe 500 and the fire extinguishing liquid 410 .

[0065] The connection portion 420 of the cooling block 400 may prevent the fire extinguishing fluid 410 from being discharged into the cooling pipe 500 at a temperature lower than a preset temperature, and may provide a passage therein so that the fire extinguishing fluid 410 is discharged toward the cooling pipe 500 .

[0066] The connecting portion 420 can generally block the space containing the fire extinguishing liquid 410 so that the fire extinguishing liquid 410 contained in the cooling block 400 does not leak to the outside. Therefore, the cross-sectional area of ​​the connecting portion 420 can be the same as the cross-sectional area of ​​the space containing the fire extinguishing liquid 410 in the cooling block 400.

[0067] Under the condition of a preset temperature or higher, a channel may be provided inside the connection portion 420, and the fire extinguishing fluid 410 contained inside the cooling block 400 may be transferred to the cooling pipe 500 through the channel provided inside the connection portion 420. The detailed mechanism of this structure will be described later.

[0068] The cooling pipe 500 according to an embodiment of the present invention may include a first pipe portion 510 and a second pipe portion 520. Specifically, the first pipe portion 510 may be disposed outside the cooling block 400, while the second pipe portion 520 may be disposed inside the cooling block 400. Here, the second pipe portion 520 may extend from the first pipe portion 510 and be coupled to the inside of the cooling block 400.

[0069] The coolant may flow inside the first pipe portion 510 and the second pipe portion 520. Here, the coolant flowing inside the first pipe portion 510 of the cooling pipe 500 may flow inside the second pipe portion 520 to allow the cooling block 400 to perform a cooling function. Specifically, the coolant may be introduced from the first pipe portion 510 into the interior of the second pipe portion 520 through one end of the second pipe portion 520, and may be discharged into the interior of the first pipe portion 510 through the other end of the second pipe portion 520.

[0070] The first and second pipe portions 510 and 520 may be connected to each other so that their interiors communicate with each other to allow the coolant to flow continuously. Specifically, the first and second pipe portions 510 and 520 may have the same cross-sectional shape.

[0071] refer to Figure 4 The second pipe portion 520 of the cooling pipe 500 may have a partially curved shape between one end and the other end. Specifically, the second pipe portion 520 may have an approximately U-shaped shape. The second pipe portion 520 having such a shape can be easily coupled to the interior of the cooling block 400, thereby also reducing the internal resistance when the coolant flows.

[0072] The second pipe portion 520 of the cooling pipe 500 may contact the connection portion 420. Here, the portion of the second pipe portion 520 contacting the connection portion 420 may have a penetrating shape so that the fire extinguishing fluid 410 passing through the connection portion 420 is introduced into the second pipe portion 520 at a preset temperature or higher.

[0073] Figure 5 is a schematic diagram illustrating a state in which the fire extinguishing fluid 410 is discharged from the cooling block 400 of the battery pack 10 according to an embodiment of the present invention.

[0074] As an example of the connection portion 420 for providing an internal passage at a preset temperature or higher, the connection portion 420 according to an embodiment of the present invention may include refractory silicon. Specifically, the connection portion 420 may be made of refractory silicon.

[0075] The refractory silicon may be refractory and ceramicized at a preset temperature or higher. Here, refractory may refer to a property of being resistant to flames and not easily burned, and ceramicized may refer to a state of hardening due to heat. That is, the connection portion 420 may be made of refractory silicon and ceramicized while being refractory.

[0076] refer to Figure 5Refractory silicon can be ceramicized at a predetermined temperature or higher to provide a gap therein, through which the fire extinguishing liquid 410 can move into the cooling pipe 500. Specifically, as the connecting portion 420 is hardened by ceramicization, the interior of the connecting portion 420 may crack, and the fire extinguishing liquid 410 may flow into the cracked portion. In other words, the cracked gap in the connecting portion 420 can serve as a channel for the fire extinguishing liquid 410 to move into the cooling pipe 500.

[0077] In this regard, the fire extinguishing liquid 410 can move into the cooling pipe 500 through the second pipe portion 520. For this movement, the connection portion 420 inside the cooling block 400 can be configured so that one side of the connection portion 420 contacts the fire extinguishing liquid 410 and the other side of the connection portion 420 contacts the second pipe portion 520 of the cooling pipe 500.

[0078] Since the cooling block 400 of the battery pack 10 according to Embodiment 1 of the present invention includes the connection portion 420 , the fire extinguishing fluid 410 may be selectively discharged as needed.

[0079] As an example of a cooling pipe 500 for defining a gap on a surface at a preset temperature or higher, the cooling pipe 500 according to an embodiment of the present invention may include refractory silicon. Specifically, the cooling pipe 500 may be made of refractory silicon. As described above, the surface of the cooling pipe 500 may be made of refractory silicon and ceramicized while being refractory.

[0080] refer to Figure 5 , the cooling pipe 500 made of refractory silicon can be ceramicized at a preset temperature or higher to provide a gap therein, and the fire extinguishing liquid 410 moving from the cooling block 400 through the gap can be discharged to the outside of the cooling pipe 500. That is, when the temperature inside the battery pack 10 rises to a preset temperature or higher due to a fire, the fire extinguishing liquid 410 contained inside the cooling block 400 can move into the second pipe portion 520 through the gap of the connecting portion 420. The fire extinguishing liquid 410 that has moved into the second pipe portion 520 can be discharged to the outside of the cooling pipe 500 through the gap in the first pipe portion 510 or the second pipe portion 520. The fire extinguishing liquid 410 discharged to the outside of the cooling pipe 500 can delay or prevent the fire from spreading inside and outside the battery pack 10. Here, the coolant inside the cooling pipe 500 can also be released to help extinguish the fire.

[0081] Since the fire extinguishing fluid 410 and the coolant are continuously supplied for a period of time when a fire occurs, the battery pack 10 according to the embodiment of the present invention can efficiently delay or prevent the spread of the fire.

[0082] Figure 6 is a schematic perspective view illustrating a cover 300 of the battery pack 10 according to an embodiment of the present invention.

[0083] As described above, the cover 300 may be coupled to the housing 200. That is, the cover 300 may be coupled to the lower side of the housing 200. However, the portion and method of coupling the cover 300 to the housing 200 may vary.

[0084] The cooling block 400 of the battery pack 10 may be coupled to the cover 300 so as to be disposed inside the cover 300. Here, the position where the cooling block 400 is coupled to the cover 300 may be variable. As an example of the configuration of this structure, one or more block coupling grooves 310 to which the cooling block 400 is coupled may be defined in the cover 300.

[0085] The block coupling groove 310 may be defined by a first partition wall 320 and a second partition wall 330. For example, the first partition wall 320 may extend vertically from the bottom of the cover 300 to protrude upward. Furthermore, the second partition wall 330 may extend horizontally to intersect with the first partition wall 320 to protrude upward. In other words, the block coupling groove 310 may be defined in a space formed by the intersecting first partition wall 320 and second partition wall 330.

[0086] The first partition wall 320 and the second partition wall 330 may be disposed perpendicular to each other in consideration of ease of manufacturing, ease of placement of the cooling block 400 , etc. However, this is merely an example, and the arrangement of the first partition wall 320 and the second partition wall 330 is not limited thereto.

[0087] refer to Figure 6 , each of the first partition wall 320 and the second partition wall 330 may be provided in plural, and the plurality of first partition walls 320 and the plurality of second partition walls 330 may intersect with each other to provide a plurality of block coupling grooves 310 .

[0088] In addition, one or more cooling blocks 400 may be coupled to at least one of the plurality of block coupling grooves 310. As described above, since the cooling block 400 is disposed in any one of the plurality of block coupling grooves 310, the cooling block 400 can be disposed at various positions depending on the arrangement shape of the battery modules 100 stacked on the housing 200. Therefore, even if the battery modules 100 are disposed at various positions inside the housing 200, the cooling blocks 400 can be disposed accordingly to efficiently cool the battery modules 100.

[0089] In order to couple the second pipe portion 520 to the interior of the cooling block 400 disposed in the block coupling groove 310, a hole may be defined at the bottom of the cover 300 corresponding to the lower portion of the block coupling groove 310. The hole may have the same cross-section as that of the cooling pipe 500. Thus, the second pipe portion 520 of the cooling pipe 500 may pass through the bottom of the cover 300 through the hole and be coupled to the cooling block 400.

[0090] Figure 7 is a schematic enlarged perspective view of a cooling block 400 and a cooling pipe 500 ′ of a battery pack according to another embodiment of the present invention.

[0091] A cooling pipe 500' of a battery pack according to another embodiment of the present invention may have a shape different from that of the cooling pipe 500 according to the embodiment. Specifically, according to the embodiment, the shapes of the first pipe portion 510' and the second pipe portion 520' of the cooling pipe 500' may be different from those of the first pipe portion 510 and the second pipe portion 520 of the cooling pipe 500. More specifically, the first pipe portion 510' may have a square cross-section, and the second pipe portion 520' may have a large area, so that the coolant flowing therein contacts the large-area connection portion 420 of the cooling block 400.

[0092] refer to Figure 7 , the entire surface of the connection portion 420 of the cooling block 400 according to another embodiment of the present invention can be in contact with the coolant flowing inside the second pipe portion 520'. Therefore, the cooling effect of the cooling block 400 can be improved, and the fire extinguishing liquid 410 can be advantageously introduced into the second pipe portion 520' at a preset temperature or higher.

[0093] In a battery pack 10 according to another embodiment of the present invention, cooling blocks 400 may be provided in all of the block coupling grooves 310 defined in the cover 300. In this case, the maximum number of cooling blocks 400 may be provided over the widest area. Thus, the widest area of ​​the battery pack 10 can be cooled, and the fire extinguishing fluid 410 can extinguish the fire over the widest area in the event of a fire.

[0094] While embodiments of the present invention have been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention as defined in the following claims.

[0095] [Description of Reference Signs]

[0096] 10: Battery pack

[0097] 100: Battery module

[0098] 200: Shell

[0099] 300: Cover

[0100] 310: Block connection slot

[0101] 320: First partition wall

[0102] 330: Second partition wall

[0103] 400: Cooling Block

[0104] 410: Fire extinguishing fluid

[0105] 420: Connection

[0106] 500, 500': cooling pipe

[0107] 510, 510': First pipe section

[0108] 520, 520': Second pipe section

Claims

1. A battery pack, comprising: a battery module, the battery module comprising a plurality of secondary batteries; a housing accommodating a plurality of battery modules; a cover coupled to the housing; one or more cooling blocks disposed inside the cover and in contact with the housing to cool the battery module; as well as a cooling pipe coupled to the cooling block and through which a coolant moves, wherein each of the cooling blocks includes a fire extinguishing fluid disposed in a space defined therein, and The fire extinguishing fluid moves into the cooling pipe at a preset temperature or higher and is discharged to the outside of the cooling pipe.

2. The battery pack according to claim 1, wherein: The cooling block further includes a connecting portion provided between the fire extinguishing liquid and the cooling pipe.

3. The battery pack according to claim 2, wherein: The connection portion prevents the fire extinguishing fluid from being discharged to the cooling pipe at a temperature lower than the preset temperature, and a passage is provided in the connection portion so that the fire extinguishing fluid is discharged toward the cooling pipe at the preset temperature or higher.

4. The battery pack according to claim 3, wherein: The connecting portion includes refractory silicon.

5. The battery pack according to claim 4, wherein: The refractory silicon is ceramized at the preset temperature or higher to define a gap therein, and The fire extinguishing fluid moves into the cooling pipe through the gap.

6. The battery pack according to claim 1, wherein: The cooling tube comprises refractory silicon.

7. The battery pack according to claim 6, wherein: The refractory silicon is ceramized at the preset temperature or higher to define gaps in its surface, and The fire extinguishing fluid is discharged to the outside of the cooling pipe through the gap.

8. The battery pack according to claim 1, wherein: The position at which the cooling block is coupled to the cover is changed.

9. The battery pack according to claim 1, wherein: One or more block coupling grooves to which the cooling block is coupled are defined in the cover.

10. The battery pack according to claim 9, wherein: The block coupling groove is defined by a first partition wall protruding upward from the bottom of the cover and a second partition wall protruding upward to intersect with the first partition wall.

11. The battery pack according to claim 10, wherein: The first partition wall is disposed perpendicular to the second partition wall.

12. The battery pack according to claim 10, wherein: Each of the first partition wall and the second partition wall is provided in plural, and the first partition wall and the second partition wall intersect each other to define a plurality of block coupling grooves, and The cooling block is coupled to one or more of the plurality of block coupling slots.

13. The battery pack according to claim 1, wherein The cooling pipe comprises: a first pipe portion, the first pipe being disposed outside the cooling block; and A second pipe portion extends from the first pipe portion and is disposed inside the cooling block.

14. The battery pack according to claim 13, wherein: In the second pipe portion, the coolant is introduced from the first pipe portion into the second pipe portion through one end of the second pipe portion, and the coolant is discharged to the first pipe portion through the other end of the second pipe portion.

15. The battery pack according to claim 14, wherein: The second pipe portion has a partially bent shape between the one end and the other end.

16. The battery pack according to any one of claims 13 to 15, wherein: The fire extinguishing fluid moves into the second pipe portion at the preset temperature or higher.

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