Battery module including structure for heat exchange and fire prevention

Abstract

The battery module according to the present invention includes a case having an accommodation space capable of accommodating a battery, and a cooling-fire extinguishing module disposed on the case and configured to cool heat that may be generated in the accommodation space and extinguish a fire that may occur in the accommodation space, the cooling-fire extinguishing module including a first space configured to allow a refrigerant capable of cooling the heat to move, and a second space distinct from the first space, formed closer to the accommodation space than the first space, and in which an extinguishing fluid for extinguishing the fire is stored.

Description

[Technical field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0147221, filed on October 29, 2021, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery module including a structure for enabling heat exchange and preventing fire. [Background technology]

[0003] As the need for alternative energy increases, research and development is being conducted on power production technologies based on energy sources with less impact on environmental pollution, such as solar heat, hydroelectric power, wind power, marine energy, biomass energy, etc. In particular, research on secondary batteries that can be repeatedly charged is being actively conducted, and development is being conducted on the materials, efficiency, structure, stability, and systems of secondary batteries.

[0004] Various types of secondary batteries are applied to electronic systems such as automobiles, mobile phones, notebook computers, etc., and when a user uses the electronic system for a long period of time, heat generation and / or fire may occur due to continuous charging / discharging. In terms of the stability of secondary batteries and systems including secondary batteries, management of the above-mentioned heat generation / fire is necessary, and structures for cooling and fire prevention have been proposed to minimize the impact of heat generation / fire.

[0005] Methods have been proposed that utilize cooling water for cooling and fire prevention, such as absorbing heat generated by the battery to cool it down, or supplying cooling water to an area where a fire has broken out to extinguish it. Summary of the Invention [Problem to be solved by the invention]

[0006] According to the conventional technology, if there is a joint defect in the cooling and fire prevention structure, the cooling water may leak during the cooling process, causing a short circuit in the secondary battery, and there may be a problem that the stability of the secondary battery module and the reliability of the continuous use of the secondary battery module may be reduced.

[0007] According to the prior art, cooling water is used in both the cooling process and the fire extinguishing process, which may cause a problem of reduced adaptive response effects for cooling and fire prevention.

[0008] The problem to be solved by the present invention is to provide a structure in a secondary battery module that can adaptively respond to the cooling process and the fire extinguishing process by using a cooling structure and a fire extinguishing structure that is distinct from the cooling structure, and that can prevent a short circuit in the secondary battery caused by leakage of cooling water due to poor bonding. [Means for solving the problem]

[0009] The battery module according to the present invention includes a case having an accommodation space capable of accommodating a battery, and a cooling-fire extinguishing module disposed on the case and configured to cool heat that may be generated in the accommodation space and extinguish a fire that may occur in the accommodation space, the cooling-fire extinguishing module including a first space configured to allow a refrigerant capable of cooling the heat to move, and a second space distinct from the first space, formed closer to the accommodation space than the first space, and in which an extinguishing fluid for extinguishing the fire is stored.

[0010] The cooling-fire extinguishing module may include a body including the first space and the second space and coupled to the case, and a division plate disposed across the body and capable of dividing the internal space of the body into the first space and the second space.

[0011] The cooling-fire extinguishing module may include a first plate coupled to the case to cover the storage space on the case and form a lower body, a partition plate partially coupled to the first plate and configured to separate the first space and the second space, and a second plate partially coupled to the partition plate and configured to form an upper body.

[0012] The first plate and the sectional plate may define the second space, and the sectional plate and the second plate may define the first space. The cooling-extinguishing module may include one or more connection holes for spatially connecting the second space and the accommodation space, and a sealing member for sealing the connection holes and melting at a predetermined temperature or higher to release the seal.

[0013] At or above the predetermined temperature, the sealing member melts and the extinguishing fluid can be sprayed into the containing space. The cooling and fire suppression module may receive the heat transfer via one or more heat dissipation pads positionable in contact with the cooling and fire suppression module.

[0014] The cooling-extinguishing module may include a partition plate capable of partitioning the first space and the second space, and the partition plate may be formed with a plurality of pin-shaped protrusions protruding into the first space and the second space.

[0015] The extinguishing fluid may have higher insulating properties than the refrigerant. The extinguishing fluid has a lower boiling point than the refrigerant and is capable of transferring the heat by a phase change. Effect of the Invention

[0016] The battery module according to the present invention can adaptively respond to a cooling process and a fire extinguishing process by using a cooling structure and a fire extinguishing structure that is distinct from the cooling structure.

[0017] The battery module according to the present invention can suppress short-circuiting of the secondary battery that may occur due to cooling water leaking due to poor bonding of some structures in the battery module. According to the battery module of the present invention, the stability and reliability of the battery module with respect to cooling and fire prevention can be improved. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a battery module according to an embodiment of the present invention; [Diagram 2] 1 is a diagram showing an internal structure of a battery module according to an embodiment of the present invention; [Diagram 3] 6A to 6C are diagrams illustrating a cooling principle of a battery module according to another embodiment of the present invention. [Figure 4] 11 is a diagram showing a fire prevention (or fire extinguishing) principle of a battery module according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in order to enable those skilled in the art to easily carry out the present invention. However, the present invention may be realized in various different forms, and is not limited to the following embodiments.

[0020] In order to clearly explain the present invention, detailed descriptions of parts that are not relevant to the explanation or related prior art that may unnecessarily obscure the gist of the present invention will be omitted, and when assigning reference symbols to components in each drawing in this specification, the same or similar reference symbols will be assigned to the same or similar components throughout the specification.

[0021] Furthermore, the terms and words used in this specification and the claims should not be interpreted in a limited manner to their ordinary or dictionary meanings, but should be interpreted in a manner that is consistent with the technical ideas of the present invention, based on the principle that the inventors can appropriately define the concepts of terms in order to best describe their invention.

[0022] FIG. 1 shows a battery module according to one embodiment of the present invention. The battery module 100 may include a case 110 . The case 110 may have an accommodating space in which a battery (or a battery assembly) 111 can be accommodated.

[0023] The case 110 may be formed to have one open side. For example, the case 110 may include an open side, and the battery 111 may be placed in an accommodation space within the case 110 through the open side.

[0024] The battery module 100 may include a cooling and fire suppression module 120 . The cooling-extinguishing module 120 may include a first space 130 (or coolant space) through which a coolant (or cooling water) used in the cooling process may move or be accommodated. For example, the coolant may pass through the first space 130 for cooling the battery 111 in the case 110.

[0025] The cooling and extinguishing module 120 may include a second space 140 (or extinguishing fluid space) capable of accommodating an extinguishing fluid used in a fire prevention process (or extinguishing process). For example, the extinguishing fluid may be stored in the second space 140 for the purpose of extinguishing a fire that may occur in the battery 111 in the case 110.

[0026] Gates through which the refrigerant can enter and exit may be formed in the cooling-extinguishing module 120. For example, one of the gates may be formed to allow the refrigerant to move into the cooling-extinguishing module 120, and the other of the gates may be formed to allow the refrigerant to move out of the cooling-extinguishing module 120. The number and positions of the gates formed are exemplary and may be implemented differently depending on the design.

[0027] The cooling and fire suppression module 120 may be disposed on the case 110 . The cooling-fire suppression module 120 may be coupled to an open side of the case 110. For example, a portion of the cooling-fire suppression module 120 may be coupled to a portion of the open side of the case 110.

[0028] The case 110 and the cooling-fire extinguishing module 120 may have an overlapping area when viewed from the side. For example, a portion of the cooling-fire extinguishing module 120 may be coupled to the case 110 in a state where the portion is retracted into the interior of the accommodation space of the case 110. Since a portion of the cooling-fire extinguishing module 120 is retracted into the interior of the accommodation space of the case 110, this may have the effect of reducing the overall size of the battery module 100.

[0029] FIG. 2 shows the internal structure of a battery module according to one embodiment of the present invention. 1, the battery module 100 may include a case 110. The housing space inside the case 110 is a space in which a battery 111 can be placed, and the battery 111 may be applied to a process or electronic system related to the battery in a state in which the battery 111 is housed and placed in the housing space.

[0030] The cooling-fire suppression module 120 may be coupled onto the case 110. For example, the cooling-fire suppression module 120 may be coupled to the case 110 on one open side of the case 110. Also, the cooling-fire suppression module 120 may be disposed so as to overlap at least a portion of the case 110 when viewed from the side.

[0031] The cooling-extinguishing module 120 may include a first space 130 in which a refrigerant can move and be accommodated, and a second space 140 in which a fire-extinguishing fluid can be stored. For example, the second space 140 may be formed closer to the battery 111 than the first space 130. Also, the first space 130 and the second space 140 may be separate spaces that are not spatially connected.

[0032] The first space 130 and the second space 140 of the cooling-fire extinguishing module 120 may be divided by a partition plate 220. For example, the partition plate 220 may be disposed between the first space 130 and the second space 140, and the partition plate 220 may be disposed to spatially divide the first space 130 and the second space 140.

[0033] The cooling and fire suppression module 120 may be comprised of a lower body 201 and an upper body 202 . The cooling and fire suppression module 120 may include a section plate 220 disposed between the lower body 201 and the upper body 202 .

[0034] The lower body 201 may be formed by the first plate 210. For example, a step may be formed in the first plate 210, and a portion of the first plate 210 (e.g., an edge of the first plate 210) may be coupled onto a portion of the case 110 (e.g., an edge of the case 110) to form the lower body 201 of the cooling-fire extinguishing module 120.

[0035] A portion of the section plate 220 can be coupled to a portion of the lower body 201 and the upper body 202. For example, an edge of the section plate 220 can be coupled onto an edge of the first plate 210 forming the lower body 201, and an edge of the section plate 220 can be coupled onto an edge of the second plate 230 forming the upper body 202.

[0036] The upper body 202 may be formed by the second plate 230. For example, a step may be formed in the second plate 230, and a portion of the second plate 230 (e.g., an edge of the second plate 230) may be coupled onto a portion of the case 110 (e.g., an edge of the case 110) to form the upper body 202 of the cooling-fire extinguishing module 120.

[0037] The second space 140 may be formed by combining the first plate 210 and the partition plate 220 that form the lower body 201. For example, the second space 140 may be formed by disposing the first plate 210 at a lower portion, disposing the partition plate 220 at an upper portion, and combining a portion of the first plate 210 and a portion of the partition plate 220.

[0038] The first space 130 may be formed by combining the second plate 230 and the partition plate 220, which form the upper body 202. For example, the first space 130 may be formed by disposing the second plate 230 on an upper portion, disposing the partition plate 220 on a lower portion, and combining a portion of the second plate 230 with a portion of the partition plate 220.

[0039] The first space 130 may be a space in which the refrigerant can move. For example, a gate through which the refrigerant can enter and exit may be formed in the second plate 230 forming the upper body 202. For example, the refrigerant may enter the inside of the cooling-extinguishing module 120 through one of the gates formed in the second plate 230 and exit the outside of the cooling-extinguishing module 120 through the other of the gates formed in the second plate 230.

[0040] The second space 140 may contain a fire extinguishing fluid. For example, the fire extinguishing fluid may have a boiling point lower than that of the refrigerant. The fire extinguishing fluid may undergo a phase change at a boiling point lower than that of the refrigerant, and the heat generated in the battery 111 may be transferred to the first space 130 by the phase change. The phase change characteristics of the fire extinguishing fluid may be used to maximize the cooling effect of the cooling-fire extinguishing module 120. For example, the fire extinguishing fluid may absorb heat and cool the surroundings, thereby providing a greater heat diffusion and fire extinguishing effect than the refrigerant.

[0041] The extinguishing fluid may include an insulating material, such as a fluorinated ketone, and may have higher insulating properties than the refrigerant. The first plate 210 forming the lower body 201 may have one or more connection holes formed therein to spatially connect the second space 140 and the receiving space of the case 110 .

[0042] One or more sealing members 211 may be coupled to one or more connection holes formed in the first plate 210 forming the lower body 201. For example, one or more sealing members 211 may be coupled to positions corresponding to the one or more connection holes, respectively. The one or more sealing members 211 are coupled to the one or more connection holes to seal the one or more connection holes. By sealing the one or more connection holes with the one or more sealing members 211, the second space 140 and the accommodation space of the case 110 can be spatially separated.

[0043] The sealing member 211 can include metal and plastic as materials. The sealing member 211 may melt at a predetermined temperature or higher. For example, if heat and / or fire occurs in the battery 111 and the temperature of the sealing member 211 becomes a predetermined temperature or higher, the sealing member 211 may melt.

[0044] When the sealing member 211 melts at a predetermined temperature or higher, the sealing of the connection hole of the sealing member 211 between the second space 140 and the accommodation space of the case 110 may be released. When the seal by the sealing member 211 is released, one or more connection holes formed in the first plate 210 forming the lower body 201 may be opened, and the second space 140 and the accommodation space of the case 110 may be spatially connected.

[0045] When the sealing member 211 is released from the connection hole while the extinguishing fluid is stored in the second space 140, the extinguishing fluid can be sprayed into the receiving space of the case 110.

[0046] The one or more heat dissipation pads 240 may be disposed between the first plate 210 forming the lower body 201 and the battery 111 placed in the accommodation space of the case 110. For example, the one or more heat dissipation pads 240 may be disposed so as to be in contact with the first plate 210 and also with the battery 111. When heat is generated in the battery 111, the one or more heat dissipation pads 240 may transfer the generated heat to the first plate 210 forming the lower body 201. The one or more heat dissipation pads 240 may be configured to allow heat to be transferred between the battery 111 and the cooling-fire extinguishing module 120.

[0047] The partition plate 220 may have a plurality of pin-shaped protrusions protruding into the first space 130. For example, when a plurality of pin-shaped protrusions are formed toward the first space 130, the partition plate 220 can increase a contact area with the refrigerant, thereby increasing heat transfer efficiency.

[0048] The partition plate 220 may have a plurality of pin-shaped protrusions protruding into the second space 140. For example, when a plurality of pin-shaped protrusions are formed toward the second space 140, the partition plate 220 can increase the contact area with the fire extinguishing fluid, thereby increasing the efficiency of heat transfer and cooling effect.

[0049] When the partition plate 220 is formed with a plurality of pin-shaped protrusions protruding toward the first space 130 and the second space 140, the contact area of ​​the partition plate 220 with the refrigerant and the extinguishing fluid is increased, thereby maximizing the efficiency of the heat transfer and cooling effect of the refrigerant and the extinguishing fluid.

[0050] FIG. 3 shows the cooling principle of a battery module according to another embodiment of the present invention. Heat may be generated in the battery 111 accommodated in the accommodation space of the case 110 of the battery module 100. For example, heat may be generated in the battery 111 as the battery 111 is charged and discharged in the battery module 100.

[0051] Heat generated in the battery 111 may be transferred to the cooling-extinguishing module 120 via one or more heat dissipation pads 240. For example, heat generated in the battery 111 may be transferred to one or more heat dissipation pads 240 arranged to be in contact with the battery 111. The one or more heat dissipation pads 240 that have received heat from the battery 111 may transfer the heat to the cooling-extinguishing module 120 (or the first plate 210 forming the lower module 201) arranged to be in contact with the heat dissipation pads 240.

[0052] The second space 140 may receive heat from the first plate 210 forming the lower module 201. Alternatively, when a fire extinguishing fluid is stored in the second space 140, the fire extinguishing fluid may receive heat from the first plate 210.

[0053] The extinguishing fluid stored in the second space 140 in the cooling-extinguishing module 120 can absorb the transferred heat. At least a portion of the extinguishing fluid can absorb the heat and undergo a phase change from a liquid state to a gaseous state in the second space 140. When the extinguishing fluid absorbs the heat and undergoes a phase change, the surroundings of the extinguishing fluid (e.g., the battery 111 in the storage space) can be cooled. The extinguishing fluid can have a very low boiling point (e.g., below 50 degrees), and the boiling point of the extinguishing fluid may be lower than the boiling point of the refrigerant. Because the phase change of the extinguishing fluid occurs at a lower temperature than the phase change of the refrigerant, the cooling effect can be greater than that of the refrigerant.

[0054] The extinguishing fluid in a gaseous state that has absorbed the heat can transfer the heat to the refrigerant flowing in the first space 130 in the cooling-extinguishing module 120 through the partition plate 220. For example, the extinguishing fluid that has absorbed the heat can transfer the heat to the partition plate 220, which has high thermal conductivity. The partition plate 220 that has received the heat can transfer the heat to the refrigerant flowing in the first space 130. The refrigerant in the first space 130 that has received the heat from the partition plate 220 can absorb the heat. The refrigerant that has absorbed the heat in the first space 130 can flow along the moving direction, and the refrigerant can move to the outside of the cooling-extinguishing module 120 through a gate formed in the cooling-extinguishing module 120.

[0055] After absorbing heat, the extinguishing fluid in a gaseous state may lose heat after transferring the heat to the refrigerant, for example, the extinguishing fluid in a gaseous state may lose heat and undergo a phase change to a liquid state.

[0056] In the cooling process of the battery module 100 including the above-mentioned cooling-extinguishing module 120, since both the refrigerant in the first space 130 and the extinguishing fluid in the second space 140 are involved in the cooling process, the cooling efficiency can be further improved compared to the case where cooling is performed only by the refrigerant. Also, in the cooling-extinguishing module 120, since the first space 130 in which the refrigerant is accommodated and the second space 140 in which the extinguishing fluid is accommodated are structurally separated, leakage of the refrigerant to the battery 111 can be prevented.

[0057] FIG. 4 illustrates a fire prevention (or fire extinguishing) principle of a battery module according to still another embodiment of the present invention. High temperature heat and / or fire may occur in the battery 111 accommodated in the accommodation space of the case 110 of the battery module 100. For example, as the battery 111 is charged and discharged in the battery module 100, heat exceeding a certain temperature and / or fire may occur in the battery 111.

[0058] High-temperature heat generated in the battery 111 may be transferred to the cooling-extinguishing module 120 via one or more heat dissipation pads 240. For example, high-temperature heat generated in the battery 111 may be transferred to one or more heat dissipation pads 240 arranged to be in contact with the battery 111. The one or more heat dissipation pads 240 that have received the high-temperature heat from the battery 111 may transfer the high-temperature heat to the cooling-extinguishing module 120 (or the first plate 210 forming the lower module 201) arranged to be in contact with the heat dissipation pads 240.

[0059] The second space 140 may receive high-temperature heat from the first plate 210 forming the lower module 201. Alternatively, when a fire extinguishing fluid is stored in the second space 140, the fire extinguishing fluid may receive high-temperature heat from the first plate 210.

[0060] The extinguishing fluid stored in the second space 140 in the cooling-extinguishing module 120 can absorb the transferred heat. For example, in the second space 140, a portion of the extinguishing fluid can absorb the heat and undergo a phase change from a liquid state to a gaseous state, and a portion of the extinguishing fluid can remain in a liquid state as the pressure in the second space 140 increases. The extinguishing fluid in the second space 140 can be in a high-pressure state where the liquid and gaseous states are mixed.

[0061] Before the battery 111 generates heat above a certain temperature, a high-pressure extinguishing fluid in a mixed liquid state and a mixed gas state can transfer heat to the first space 130 to perform cooling. For example, the extinguishing fluid in a mixed state (e.g., gaseous state + liquid state) that has absorbed heat can transfer heat to the refrigerant flowing in the first space 130 in the cooling-extinguishing module 120 through the partition plate 220. Specifically, the extinguishing fluid that has absorbed heat can transfer heat to the partition plate 220 with high thermal conductivity. The partition plate 220 that has received the heat can transfer heat to the refrigerant flowing in the first space 130. The refrigerant in the first space 130 that has received the heat from the partition plate 220 can absorb heat. The refrigerant that has absorbed heat in the first space 130 can flow along the moving direction, and the refrigerant can move to the outside of the cooling-extinguishing module 120 through a gate formed in the cooling-extinguishing module 120.

[0062] When the battery 111 generates heat exceeding a certain temperature or a fire occurs, the temperature of the sealing member 211 may exceed a predetermined temperature and melt. For example, one or more sealing members 211 coupled to one or more connection holes formed in the first plate 210 forming the lower body 201 may melt.

[0063] When the sealing member 211 melts at a predetermined temperature or higher, the sealing of the connection hole of the sealing member 211 between the second space 140 and the receiving space of the case 110 may be released.

[0064] When the seal by the sealing member 211 is released, one or more connection holes formed in the first plate 210 forming the lower body 201 may be opened, and the second space 140 and the accommodating space of the case 110 may be spatially connected.

[0065] When the second space 140 and the storage space of the case 110 are spatially connected, high pressure within the second space 140 can cause the extinguishing fluid to spray into the storage space within the case 110. For example, when the seal by the sealing member 211 is released and the second space 140 and the storage space of the case 110 are connected, high pressure within the second space 140 can cause the mixed extinguishing fluid to spray and splash into the storage space in which the battery 111 is located (e.g., a spray effect).

[0066] The extinguishing fluid sprayed into the storage space of the case 110 in which the battery 111 is located can block thermal diffusion of the battery 111 in a high temperature state and / or a fire state. In addition, the sprayed extinguishing fluid can extinguish a fire that has broken out in the battery 111 and suppress ignition.

[0067] In the fire prevention (or extinguishing) process of the battery module 100 including the above-mentioned cooling-fire extinguishing module 120, the fire can be quickly extinguished and additional fires can be suppressed by spraying the fire extinguishing fluid onto the battery 111. Also, in the fire prevention (or extinguishing) process, since the first space 130 in which the refrigerant is accommodated and the second space 140 in which the extinguishing fluid is accommodated are structurally separated in the cooling-fire extinguishing module 120, leakage of the refrigerant to the battery 111 can be prevented.

[0068] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and various implementations are possible within the scope of the technical concept of the present invention and the scope of the claims described below by a person having ordinary knowledge in the technical field to which the present invention belongs. [Explanation of symbols]

[0069] 100: Battery module 110: Case 111: Battery (or battery assembly) 120: Cooling-fire suppression module 130: 1st space 140:Second space 201: Lower body 202: Upper body 211: Sealing member 210: First Plate 220: Division plate 230: Second plate 240: Heat dissipation pad

Claims

1. A case having a storage space capable of storing a battery; A cooling and extinguishing module is disposed on the case and configured to cool heat that may occur in the storage space and extinguish a fire that may occur in the storage space; Including, The cooling and extinguishing module comprises: A first space in which a coolant capable of cooling the heat can move; a second space that is distinct from the first space and is formed closer to the storage space than the first space, and in which an extinguishing fluid for extinguishing the fire is stored; Including, The cooling and extinguishing module comprises: a first plate that is coupled to the case to cover the receiving space on the case and that forms a lower body; a partition plate, a portion of which is connected to the first plate and configured to partition the first space and the second space; a second plate coupled to a portion of the partition plate to form an upper body.

2. the first plate and the partition plate define the second space; The battery module of claim 1 , wherein the partition plate and the second plate define the first space.

3. The cooling and extinguishing module comprises: One or more connection holes are provided so that the second space and the receiving space can be spatially connected to each other; The battery module of claim 1 , further comprising: a sealing member for sealing the connection hole and melting at a predetermined temperature or higher to release the seal.

4. The battery module according to claim 3 , wherein the sealing member melts at or above the predetermined temperature, and the fire-extinguishing fluid is ejected into the accommodation space.

5. The cooling and extinguishing module comprises: The battery module according to claim 1 , wherein the heat transfer can be received through one or more heat dissipation pads that can be placed in contact with the cooling and fire extinguishing module.

6. A case having a storage space capable of storing a battery; A cooling and extinguishing module is disposed on the case and configured to cool heat that may occur in the storage space and extinguish a fire that may occur in the storage space; Including, The cooling and extinguishing module comprises: A first space in which a coolant capable of cooling the heat can move; a second space that is distinct from the first space and is formed closer to the storage space than the first space, and in which an extinguishing fluid for extinguishing the fire is stored; Including, The cooling and extinguishing module comprises: a partition plate capable of partitioning the first space and the second space, The partition plate has a plurality of pin-shaped protrusions formed thereon protruding into the first space and the second space.

7. The extinguishing fluid is The battery module according to claim 1 , having higher insulation properties than the refrigerant.

8. A case having a storage space capable of storing a battery; A cooling and extinguishing module is disposed on the case and configured to cool heat that may occur in the storage space and extinguish a fire that may occur in the storage space; Including, The cooling and extinguishing module comprises: A first space in which a coolant capable of cooling the heat can move; a second space that is distinct from the first space and is formed closer to the storage space than the first space, and in which an extinguishing fluid for extinguishing the fire is stored; Including, The extinguishing fluid is has a boiling point lower than that of the refrigerant, The battery module is capable of transferring the heat by a phase change.

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