Battery pack

Abstract

The present invention relates to a battery pack that can efficiently perform cooling and fire extinguishing without reducing the usability of the space. The battery pack according to the present invention includes a battery module comprising a plurality of secondary batteries, a case housing the plurality of the battery modules, a cover coupled to the case, one or more cooling blocks disposed inside the cover and in contact with the case to cool the battery modules, and a cooling pipe coupled to the cooling block through which a refrigerant moves, wherein the cooling block contains a fire extinguishing liquid disposed in a space formed inside, and the fire extinguishing liquid may move into the cooling pipe and be released to the outside of the cooling pipe at a temperature above a predetermined temperature.

Description

Technical Field

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[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0035866 filed on March 20, 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 more particularly, to a battery pack including one or more secondary batteries capable of charging and discharging.

Background Art

[0003] In recent years, due to the depletion of fossil fuels, the price of energy sources has increased, and the concern about environmental pollution has been amplified. The demand for environmentally friendly alternative energy sources has become an essential and indispensable factor for future life. Therefore, research on various power generation technologies such as solar power, wind power, and tidal power has been continuously carried out, and there has also been a great deal of interest in power storage devices such as batteries for more efficiently using the electrical energy produced in this way.

[0004] Furthermore, as the development of technologies and the increase in demand for electronic mobile devices and electric vehicles using batteries continue, the demand for batteries as an energy source has rapidly increased, and accordingly, many studies have been conducted on batteries that can meet various requirements.

[0005] Batteries for storing electrical energy can generally be classified into primary batteries and secondary batteries. A primary battery is a disposable consumable battery, while a secondary battery is a rechargeable battery manufactured using a material in which the process of oxidation and reduction between current and substances can be repeated. That is, when a reduction reaction is performed on the material by current, the power source is charged, and when an oxidation reaction is performed on the material, the power source is discharged. Electricity is generated while such charging - discharging is repeatedly performed.

[0006] Secondary batteries can be classified by their form into cylindrical cells, pouch cells, prismatic cells, etc. Of these, pouch cells can include electrode assemblies in which a positive electrode, negative electrode, separator membrane, etc., are stacked inside a pouch.

[0007] On the other hand, multiple secondary batteries, as described earlier, may be housed inside the frame to form a battery module. Furthermore, multiple battery modules can be assembled to form a battery pack. In recent years, the need for high-capacity structures has increased, particularly for use as energy storage sources, leading to a growing demand for battery packs that combine numerous secondary batteries or battery modules.

[0008] Because battery packs are manufactured with numerous battery modules densely packed into a small space, each battery module generates a large amount of heat, which can cause flames to form within the battery modules. Furthermore, these flames may spread to the outside of the battery pack.

[0009] This necessitates a configuration to lower the internal temperature of the battery pack, which generates a large amount of heat, and may also require a configuration that enables fire extinguishing in the event of a fire.

[0010] Conventional battery packs require a separate fire extinguishing system inside, which reduces the usable space within the battery pack and consequently decreases its energy capacity. Furthermore, there was the problem of being unable to control the entire internal space of the battery pack in the event of a fire. Additionally, if a fire occurred within the battery pack, it was not possible to sufficiently delay the spread of the fire.

[0011] Therefore, there is a need for a battery pack that can efficiently perform cooling and fire extinguishing without reducing usability of the space. [Overview of the project] [Problems that the invention aims to solve]

[0012] The present invention aims to provide a battery pack that can efficiently perform cooling and fire extinguishing functions without reducing the usability of the space. [Means for solving the problem]

[0013] The battery pack according to the present invention includes a battery module comprising a plurality of secondary batteries, a case housing the plurality of the battery modules, a cover coupled to the case, one or more cooling blocks disposed inside the cover and in contact with the case to cool the battery modules, and a cooling pipe coupled to the cooling block through which a refrigerant moves, wherein the cooling block contains a fire extinguishing liquid disposed in a space formed inside, and the fire extinguishing liquid may move into the cooling pipe and be released to the outside of the cooling pipe at a temperature above a predetermined temperature.

[0014] The cooling block may further include a connecting portion positioned between the fire extinguishing liquid and the cooling pipe.

[0015] The connecting portion can provide an internal flow path to prevent the fire extinguishing liquid from being released into the cooling pipe when the temperature is below a predetermined level, and to allow the fire extinguishing liquid to be released towards the cooling pipe when the temperature is above a predetermined level.

[0016] The connecting portion may contain fire-resistant silicone.

[0017] The refractory silicone is ceramicized at a temperature above a predetermined level, creating gaps inside, through which the fire extinguishing liquid can move into the cooling pipe.

[0018] The cooling pipe may contain refractory silicone.

[0019] The refractory silicon is ceramized at a temperature equal to or higher than a predetermined temperature to form gaps on the surface, and the refrigerant and the fire extinguishing liquid may be discharged to the outside of the cooling pipe through the gaps.

[0020] The position where the cooling block is coupled to the cover may be variable.

[0021] One or more block coupling grooves to which the cooling block is coupled may be formed in the cover of the battery pack.

[0022] The block coupling groove may be formed by a first partition wall protruding upward from the bottom of the cover and a second partition wall protruding upward so as to intersect the first partition wall.

[0023] The first partition wall may be arranged to be orthogonal to the second partition wall.

[0024] A plurality of the first partition walls and the second partition walls are provided, the first partition walls and the second partition walls intersect each other to form a plurality of block coupling grooves, and the cooling block may be coupled to one or more of the plurality of block coupling grooves.

[0025] The cooling pipe may include a first pipe portion located outside the cooling block and a second pipe portion extending from the first pipe portion and located inside the cooling block.

[0026] In the second pipe portion, the refrigerant may flow into the inside of the second pipe portion from the first pipe portion through one end of the second pipe portion, and the refrigerant may be discharged to the first pipe portion through the other end of the second pipe portion.

[0027] The second pipe portion may have a shape in which a part between the one end and the other end is bent.

[0028] The fire extinguishing liquid may move into the inside of the second pipe portion at a temperature equal to or higher than a predetermined temperature.

Advantages of the Invention

[0029] The battery pack according to the present invention includes a battery module including a plurality of secondary batteries, a case in which a plurality of the battery modules are housed, a cover coupled to the case, one or more cooling blocks disposed inside the cover and contacted with the case to cool the battery module, and a cooling pipe coupled to the cooling block and through which a refrigerant moves inside. The cooling block includes a fire extinguishing liquid disposed in a space formed inside, and the fire extinguishing liquid may move inside the cooling pipe and be discharged to the outside of the cooling pipe at a predetermined temperature or higher.

[0030] Thereby, it is possible to reduce the heat of the battery pack while not reducing the space utilization of the battery pack.

[0031] Also, at the time of a fire, it is possible to efficiently delay or prevent the spread of the fire.

[0032] In addition, since there are various positions where the cooling block can be disposed, it is possible to manage the entire space inside the battery pack from a fire.

[0033] Through this, the stability of the battery pack can be improved.

[0034] The effects according to the present invention are not limited to the contents exemplified above, and more various effects are included in this specification.

Brief Description of the Drawings

[0035] [Figure 1] It is a perspective view schematically showing a battery pack according to an embodiment of the present invention. [Figure 2] It is a separated perspective view schematically showing a battery pack according to an embodiment of the present invention. [Figure 3]This is a schematic cross-sectional view showing a section cut along line A-A' in Figure 1. [Figure 4] This is an enlarged perspective view schematically showing the cooling block and cooling pipe of a battery pack according to one embodiment of the present invention. [Figure 5] This diagram schematically shows how fire extinguishing liquid is discharged from the cooling block of a battery pack according to one embodiment of the present invention. [Figure 6] This is a schematic perspective view of a battery pack cover according to one embodiment of the present invention. [Figure 7] This is an enlarged perspective view schematically showing a cooling block and cooling pipe of a battery pack according to another embodiment of the present invention. [Modes for carrying out the invention]

[0036] In the following, preferred embodiments of the present invention will be described in detail with reference to the attached figures, so that they can be easily implemented by a person with ordinary skill in the art to which the present invention pertains. However, the present invention may be embodied in a variety of different forms and is not limited to or restricted by the following embodiments.

[0037] In order to clearly explain the present invention, detailed descriptions of related prior art that are not relevant to the description or that could unnecessarily obscure the gist of the invention have been omitted. In this specification, when assigning reference numerals to the components of each figure, the same or similar reference numerals will be assigned to components that are the same or similar throughout the specification.

[0038] Furthermore, the terms and words used in this specification and the claims shall not be interpreted to be limited to their ordinary or lexicographical meanings, but rather to be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors may define the concepts of terms as appropriate to best describe their invention.

[0039] Figure 1 is a schematic perspective view showing a battery pack 10 according to one embodiment of the present invention, and Figure 2 is a schematic separated perspective view showing a battery pack 10 according to one embodiment of the present invention.

[0040] A battery pack 10 according to one embodiment of the present invention may contain a plurality of battery modules 100. That is, the battery pack 10 may be formed by assembling one or more battery modules 100, each containing a plurality of secondary batteries, to provide a large amount of electrical energy. A battery module 100 may contain a plurality of secondary batteries. Here, the secondary batteries may be pouch cells, cylindrical cells, prismatic cells, etc. Alternatively, a battery pack may be formed by assembling a plurality of secondary batteries.

[0041] As a configuration for housing multiple battery modules 100, the battery pack 10 may include a case 200. The case 200 encloses the entire battery module 100, thereby protecting the battery module 100 from external vibrations and shocks. The case 200 can vary depending on the location where the battery modules 100 are arranged, the form of other components included in the battery pack 10, etc. However, in one embodiment of the present invention, a case 200 with a substantially rectangular parallelepiped shape will be described as an example.

[0042] As shown in Figure 1, multiple battery modules 100 may be housed inside a case 200. The case 200 may include an upper case and a lower case for efficiency in the manufacturing process of the battery pack 10. This allows for more efficient placement of the battery modules 100 and assembly of the case 200. However, the upper case is omitted in Figures 1 and 2.

[0043] A battery pack 10 according to one embodiment of the present invention may further include a cover 300, a cooling block 400, and a cooling pipe 500 as an example of a configuration for cooling and fire suppression.

[0044] As shown in Figures 1 and 2, the cover 300 may be located at the bottom of the case 200, and the cooling block 400 may be located inside the cover 300. Specifically, the cover 300 may be coupled to the bottom of the case 200, and the cooling block 400 may be located inside the cover 300 in contact with the case 200 to cool the battery module 100 housed in the case 200. In addition, the cooling pipe 500 may be coupled to the cooling block 400 so that the cooling block 400 can exert its cooling effect.

[0045] The battery pack 10, which generates a large amount of heat, may require a cooling means to remove the heat. Therefore, the cooling pipe 500 of the battery pack 10 according to one embodiment of the present invention allows a coolant to move inside.

[0046] To facilitate the movement of the refrigerant, the cooling pipe 500 may have a generally tubular shape. In this case, the cooling pipe 500 may have a shape in which a portion is bent in order to efficiently connect to the cooling block 400.

[0047] Here, the refrigerant flowing inside the cooling pipe 500 can be a fluid substance capable of cooling to dissipate heat. For example, the refrigerant can be cooling water.

[0048] In one embodiment of the present invention, the battery pack 10 allows a cooling block 400 to perform a cooling effect as a coolant flows through the cooling pipe 500 connected to the cooling block 400. Furthermore, the cooling block 400 connected to the cooling pipe 500 is positioned to contact the case 200 in which the battery module 100 is housed, thereby cooling the battery module 100.

[0049] On the other hand, if a fire occurs due to a large amount of heat generated by the battery pack 10, a configuration may be necessary to prevent the spread of the fire. Therefore, the cooling block 400 of the battery pack 10 according to one embodiment of the present invention may include a fire extinguishing liquid 410.

[0050] An empty space may be formed inside the cooling block 400 to accommodate the fire extinguishing liquid 410. The fire extinguishing liquid 410 contained in the internal space of the cooling block 400 may move into the cooling pipe 500 when it reaches a predetermined temperature or higher, and then be released outside the cooling pipe 500. Here, the predetermined temperature can mean a temperature at which a fire would pose a risk of causing problems with the function of the battery pack 10.

[0051] In one embodiment of the present invention, the battery pack 10 includes a cooling block 400 containing a fire extinguishing liquid 410. Therefore, the cooling block 400, which normally provides a cooling effect, can also perform a fire extinguishing function in the event of a fire.

[0052] The structure of the cooling block 400 and the cooling pipe 500 will be described in more detail below.

[0053] Figure 3 is a schematic cross-sectional view showing a section cut along line A-A' in Figure 1, and Figure 4 is a schematic enlarged perspective view showing the cooling block 400 and cooling pipe 500 of the battery pack 10 according to one embodiment of the present invention.

[0054] As shown in Figures 3 and 4, the cooling block 400 may further include a connecting portion 420 positioned between the cooling pipe 500 and the fire extinguishing liquid 410.

[0055] The connecting portion 420 of the cooling block 400 can provide an internal flow path to prevent the fire extinguishing liquid 410 from being released into the cooling pipe 500 when the temperature is below a predetermined level, and to allow the fire extinguishing liquid 410 to be released into the cooling pipe 500 when the temperature is above a predetermined level.

[0056] The connecting portion 420 can seal the space containing the fire extinguishing liquid 410, which is normally stored inside the cooling block 400, so that the fire extinguishing liquid 410 does not leak out to the outside. Therefore, the connecting portion 420 can have the same cross-sectional area as the space inside the cooling block 400 in which the fire extinguishing liquid 410 is stored.

[0057] Under conditions above a predetermined temperature, the connecting portion 420 may have a flow path formed inside it, which allows the fire extinguishing liquid 410 contained inside the cooling block 400 to move into the cooling pipe 500. The detailed mechanism for this will be explained later.

[0058] A cooling pipe 500 according to one embodiment of the present invention may include a first pipe section 510 and a second pipe section 520. Specifically, the first pipe section 510 may be located outside the cooling block 400, and the second pipe section 520 may be located inside the cooling block 400. In this case, the second pipe section 520 may extend from the first pipe section 510 and be connected inside the cooling block 400.

[0059] The refrigerant can flow through the interior of the first pipe section 510 and the interior of the second pipe section 520. At this time, the cooling block 400 can perform its cooling action while the refrigerant that was flowing through the first pipe section 510 of the cooling pipe 500 flows through the interior of the second pipe section 520. Specifically, the refrigerant may flow from the first pipe section 510 into the interior of the second pipe section 520 via one end of the second pipe section 520, and then flow out again into the interior of the first pipe section 510 via the other end of the second pipe section 520.

[0060] On the other hand, the first pipe section 510 and the second pipe section 520 may be connected by penetrating each other internally so that the refrigerant can flow continuously. Specifically, the first pipe section 510 and the second pipe section 520 may have the same cross-sectional shape.

[0061] As shown in Figure 4, the second pipe section 520 of the cooling pipe 500 may have a shape in which a portion between one end and the other is bent. Specifically, the second pipe section 520 may have a roughly U-shape. A second pipe section 520 of this shape can be easily coupled inside the cooling block 400, and the resistance inside can be reduced when the refrigerant flows through it.

[0062] The second pipe section 520 of the cooling pipe 500 can come into contact with the connecting section 420. In this case, the portion of the second pipe section 520 that comes into contact with the connecting section 420 can have a shape that allows the fire extinguishing liquid 410 that has passed through the connecting section 420 at a temperature above a predetermined level to flow into the interior of the second pipe section 520.

[0063] Figure 5 is a schematic diagram showing how the fire extinguishing liquid 410 is released from the cooling block 400 of the battery pack 10 according to one embodiment of the present invention.

[0064] As an example of a connecting portion 420 for providing a flow path inside at a temperature above a predetermined temperature, the connecting portion 420 according to one embodiment of the present invention may include refractory silicone. Specifically, the connecting portion 420 may be made of refractory silicone.

[0065] Refractory silicone can be fire-resistant and may be ceramicized at a temperature above a specified temperature. Here, fire resistance can mean the property of not burning easily in the face of fire, and ceramicization can mean the state of hardening due to heat. In other words, since the connecting portion 420 is made of refractory silicone, it may be ceramicized while withstanding fire.

[0066] As shown in Figure 5, the refractory silicone is ceramicized above a predetermined temperature, creating a gap inside, through which the fire extinguishing liquid 410 can move into the cooling pipe 500. Specifically, the connecting portion 420 solidifies through ceramicization, cracking internally, and the fire extinguishing liquid 410 can flow through the cracked portion. In other words, the gap in the cracked portion of the connecting portion 420 can act as a channel through which the fire extinguishing liquid 410 moves into the cooling pipe 500.

[0067] In this regard, the fire extinguishing liquid 410 can move into the cooling pipe 500 via the second pipe section 520. For such movement, the connecting section 420 inside the cooling block 400 may be positioned such that one side is in contact with the fire extinguishing liquid 410 and the other side is in contact with the second pipe section 520 of the cooling pipe 500.

[0068] The cooling block 400 of the battery pack 10 according to Embodiment 1 of the present invention includes a connecting portion 420, so that the fire extinguishing liquid 410 can be selectively released when necessary.

[0069] As an example of a cooling pipe 500 for forming a gap on its surface above a predetermined temperature, the cooling pipe 500 according to one embodiment of the present invention may include refractory silicone. Specifically, the cooling pipe 500 may be made of refractory silicone. As described above, since the surface of the cooling pipe 500 is made of refractory silicone, it can be ceramicized while withstanding fire.

[0070] As shown in Figure 5, the cooling pipe 500, made of fire-resistant silicone, is ceramicized above a predetermined temperature, creating a gap inside. Through this gap, the fire extinguishing liquid 410 that has moved from the cooling block 400 can be released to the outside of the cooling pipe 500. That is, when the temperature inside the battery pack 10 rises above a predetermined temperature due to a fire, the fire extinguishing liquid 410 contained inside the cooling block 400 can move into the second pipe section 520 through the gap in the connecting section 420. The fire extinguishing liquid 410 that has moved into the second pipe section 520 can be released to the outside of the cooling pipe 500 through the gap in the first pipe section 510 or the second pipe section 520. The fire extinguishing liquid 410 released to the outside of the cooling pipe 500 can delay or prevent the spread of fire inside and outside the battery pack 10. At this time, the refrigerant that was inside the cooling pipe 500 is also released, which can help extinguish the fire.

[0071] In one embodiment of the present invention, the battery pack 10 continuously supplies fire extinguishing liquid 410 and refrigerant for a certain period of time when a fire occurs, thereby efficiently delaying or preventing the spread of fire.

[0072] Figure 6 is a schematic perspective view of the cover 300 of the battery pack 10 according to one embodiment of the present invention.

[0073] As explained earlier, the cover 300 may be attached to the case 200. That is, the cover 300 may be attached to the underside of the case 200. However, the part and method of attachment of the cover 300 to the case 200 can vary.

[0074] The cooling block 400 of the battery pack 10 may be coupled to the cover 300 so as to be positioned inside the cover 300. In this case, the position to which the cooling block 400 is coupled to the cover 300 may be variable. As an example of such a configuration, the cover 300 may have one or more block coupling grooves 310 formed therein to which the cooling block 400 is coupled.

[0075] On the other hand, the block coupling groove 310 may be formed 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 and protrude upward. The second partition wall 330 may extend horizontally so as to intersect the first partition wall 320 and protrude upward. That is, the block coupling groove 310 may be formed in the space created when the first partition wall 320 and the second partition wall 330 intersect each other.

[0076] The first partition wall 320 and the second partition wall 330 may be arranged orthogonally to each other, taking into consideration ease of manufacture, ease of arranging 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 to this.

[0077] As shown in Figure 6, multiple first partition walls 320 and multiple second partition walls 330 may be provided, and multiple first partition walls 320 and multiple second partition walls 330 may intersect with each other to form multiple block coupling grooves 310.

[0078] Furthermore, one or more cooling blocks 400 may be coupled to at least one of the multiple block coupling grooves 310. In this way, the cooling blocks 400 can be placed in any of the multiple block coupling grooves 310, so the cooling blocks 400 can be placed in various positions depending on the arrangement of the battery modules 100 stacked on the case 200. Therefore, even if the battery modules 100 are arranged in various ways inside the case 200, the cooling blocks 400 can be positioned accordingly, so that the battery modules 100 can be cooled efficiently.

[0079] On the other hand, in order for the second pipe portion 520 to be coupled to the inside of the cooling block 400 which is positioned in the block coupling groove 310, a hole may be formed in the bottom of the cover 300 corresponding to the lower part of the block coupling groove 310. This hole may have the same cross-section as the cross-section of the cooling pipe 500. Therefore, the second pipe portion 520 of the cooling pipe 500 may be coupled to the cooling block 400 by passing through the bottom of the cover 300 via this hole.

[0080] Figure 7 is an enlarged perspective view schematically showing the cooling block 400 and cooling pipe 500' of a battery pack according to another embodiment of the present invention.

[0081] The cooling pipe 500' of the battery pack according to another embodiment of the present invention may have a different shape from the cooling pipe 500 according to one embodiment. Specifically, the shapes of the first pipe portion 510' and the second pipe portion 520' of the cooling pipe 500' may differ from the shapes of the first pipe portion 510 and the second pipe portion 520 of the cooling pipe 500 according to one embodiment. More specifically, the first pipe portion 510' may have a square cross-section, and the second pipe portion 520' may allow the refrigerant flowing inside to contact the connecting portion 420 of the cooling block 400 over a wider area.

[0082] As shown in Figure 7, in another embodiment of the present invention, the connecting portion 420 of the cooling block 400 can be in contact with the refrigerant flowing inside the second pipe portion 500' on one entire surface. Therefore, the cooling effect of the cooling block 400 is better, which may be advantageous for the fire extinguishing liquid 410 to flow into the second pipe portion 520' at a temperature above a predetermined level.

[0083] On the other hand, in another embodiment of the present invention, the battery pack 10 may have cooling blocks 400 arranged in all block coupling grooves 310 formed in the cover 300. In this case, the largest number of cooling blocks 400 may be arranged over the widest area. Therefore, the widest area of ​​the battery pack 10 can be cooled, and in the event of a fire, the fire extinguishing liquid 410 can perform its fire extinguishing action over the widest area.

[0084] Although the present invention has been described in part by limited embodiments and drawings, it is not limited thereto, and various implementations are possible by persons with ordinary skill in the art to which the present invention pertains, within the equivalent scope of the technical concept of the present invention and the claims described below. [Explanation of symbols]

[0085] 10 Battery Packs 100 Battery Modules 200 cases 300 Cover 310 Block joint groove 320 1st bulkhead 330 2nd bulkhead 400 Cooling Block 410 Fire extinguishing liquid 420 Connection section 500, 500' cooling pipe 510, 510' First pipe section 520, 520' Second pipe section

Claims

1. Battery module containing multiple rechargeable batteries; A case in which multiple battery modules are housed; A cover to be attached to the aforementioned case; One or more cooling blocks disposed inside the cover and in contact with the case to cool the battery module; and The cooling block is coupled to a cooling pipe through which a refrigerant moves, The cooling block is, It contains a fire extinguishing liquid placed in a space formed inside, A battery pack in which, when the temperature exceeds a predetermined level, the fire extinguishing liquid moves into the cooling pipe and is released to the outside of the cooling pipe.

2. The cooling block is, The battery pack according to claim 1, further comprising a connecting portion disposed between the fire extinguishing liquid and the cooling pipe.

3. The aforementioned connecting portion is Below a predetermined temperature, the fire extinguishing liquid is prevented from being released into the cooling pipe. The battery pack according to claim 2, further comprising a flow path inside such that the fire extinguishing liquid is discharged toward the cooling pipe when the temperature exceeds a predetermined level.

4. The aforementioned connecting portion is The battery pack according to claim 3, comprising fire-resistant silicone.

5. The aforementioned fire-resistant silicone is At temperatures above a predetermined level, it becomes ceramic, and gaps are formed inside. The battery pack according to claim 4, wherein the fire extinguishing liquid moves into the inside of the cooling pipe through the gap.

6. The aforementioned cooling pipe is The battery pack according to claim 1, comprising fire-resistant silicone.

7. The aforementioned fire-resistant silicone is At temperatures above a predetermined level, it is ceramicized, and gaps are formed on the surface. The battery pack according to claim 6, wherein the refrigerant and the fire extinguishing liquid are discharged to the outside of the cooling pipe through the gap.

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

9. The battery pack according to claim 1, wherein the cover has one or more block coupling grooves formed therein, to which the cooling block is coupled.

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

11. The first partition wall is, The battery pack according to claim 10, which is arranged so as to be perpendicular to the second partition wall.

12. The first partition and the second partition are provided in multiple units. The first partition wall and the second partition wall intersect each other, forming a plurality of block connecting grooves. The battery pack according to claim 10, wherein the cooling block is coupled to one or more of the plurality of block coupling grooves.

13. The aforementioned cooling pipe is A first pipe section located outside the cooling block; and The battery pack according to claim 1, further comprising a second pipe portion extending from the first pipe portion and located inside the cooling block.

14. In the second pipe section, The refrigerant flows from the first pipe section into the interior of the second pipe section via one end of the second pipe section. The battery pack according to claim 13, wherein the refrigerant is discharged to the first pipe through the other end of the second pipe.

15. The second pipe section is, The battery pack according to claim 14, wherein a portion between the one end and the other end is bent.

16. The aforementioned fire extinguishing liquid is The battery pack according to any one of claims 13 to 15, wherein the battery pack moves into the interior of the second pipe section when the temperature exceeds a predetermined level.

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