Immersed battery pack

Abstract

The invention relates to the technical field of battery packs, in particular to an immersed battery pack. The immersed battery pack comprises a shell, a battery cell and a heat dissipation assembly, wherein a containing cavity is formed in the shell, cooling liquid is arranged in the containing cavity, and the cooling liquid is in a static state. And the battery cell is immersed in the cooling liquid. The heat dissipation assembly is arranged on at least one side face of the shell, and the heat dissipation assembly is configured to dissipate heat of the cooling liquid. The cooling liquid in the immersed battery pack is statically immersed in the shell and does not need to be circulated by an oil pump, so that the energy consumption is reduced, and the performance degradation phenomenon of the cooling liquid is reduced; and meanwhile, the risk of cooling liquid leakage can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to an immersion battery pack. Background Art

[0002] With the continuous advancement of technology, the requirements for heat dissipation performance in battery packs are increasing. Immersion liquid cooling technology, due to its significant advantages in heat dissipation, is gradually becoming the inevitable development direction of future battery packs. This technology directly contacts energy storage cells with a special cooling oil, completely immersing the cells in the insulating cooling oil. This is supplemented by an oil circulation system and a refrigeration system, using the cooling oil as a heat dissipation medium to achieve rapid heat transfer and dissipation, thereby maintaining the battery cells within the optimal temperature range and ensuring the stable operation of the energy storage device.

[0003] The existing immersed battery packs completely immerse the battery cells in a sealed oil cylinder. The insulating cooling oil in the cylinder is circulated using a plate heat exchanger and an oil pump. This not only increases the power consumption and cost of the oil pump, but also transfers heat from the oil pump to the insulating cooling oil, increasing the cooling capacity demand and, in turn, the cooling power loss. The constant stirring of the insulating cooling oil by the oil pump accelerates the degradation of its performance and shortens its service life. Furthermore, the existing oil pumps are complex in structure, expensive, and require a large number of pipelines to transport the insulating cooling oil, making them prone to oil leakage due to poor sealing.

[0004] Therefore, it is urgent to design an immersion battery pack to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to propose an immersion-type battery pack, in which the coolant is statically immersed in the shell, without the need for an oil pump for circulation, thereby reducing energy consumption and reducing the performance degradation of the coolant; and reducing the risk of coolant leakage.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The present invention provides an immersion battery pack, comprising:

[0008] A housing, wherein a receiving chamber is provided in the housing, wherein a coolant is provided in the receiving chamber, and the coolant is in a static state;

[0009] a battery cell, wherein the battery cell is immersed in the coolant;

[0010] A heat dissipation component is provided on at least one side surface of the housing and is configured to dissipate heat from the coolant.

[0011] As an optional technical solution for an immersion battery pack, the heat dissipation assembly includes a first heat dissipation fin, which is protruded from the inner wall of the shell and is in contact with the coolant.

[0012] As an optional technical solution for an immersion battery pack, the heat dissipation assembly also includes a second heat dissipation fin and a heat dissipation box. The second heat dissipation fin is arranged in the heat dissipation box, and one side of the heat dissipation box is connected to the outer wall of the shell so that the heat of the coolant can be transferred to the second heat dissipation fin through the first heat dissipation fin.

[0013] As an optional technical solution for an immersion battery pack, the first heat dissipation fins and the second heat dissipation fins are both provided in plurality, and the plurality of the first heat dissipation fins are arranged at equal intervals, and the plurality of the second heat dissipation fins are arranged at equal intervals.

[0014] As an optional technical solution for an immersion battery pack, the heat dissipation assembly further includes a fan, which is disposed on at least one side of the heat dissipation box and is configured to dissipate heat from the second heat dissipation fins.

[0015] As an optional technical solution for an immersion battery pack, a heat dissipation chamber is provided inside the heat dissipation box, and one side of the heat dissipation box is thermally connected to the outer wall of the shell; the second heat dissipation fins are arranged in the heat dissipation chamber, and the opposite sides of the second heat dissipation fins are thermally connected to the two opposite inner walls of the heat dissipation chamber respectively, and the second heat dissipation fins and the inner wall of the heat dissipation chamber form a heat dissipation channel, and the heat dissipation channel is connected to the environment outside the heat dissipation box through the fan; the heat of the second heat dissipation fins can be transferred to the heat dissipation channel, and the fan can transfer the heat of the heat dissipation channel to the environment outside the heat dissipation box.

[0016] As an optional technical solution for an immersion battery pack, the heat dissipation assembly further includes a connector, which is arranged on the inner wall of the heat dissipation box. A first fixing hole is provided on the connector, and the first fixing hole is configured to be connected to the fan.

[0017] As an optional technical solution for an immersion battery pack, a fixing beam is provided in the accommodating chamber, a second fixing hole is provided on the fixing beam, and the second fixing hole is configured to be connected to the battery cell.

[0018] As an optional technical solution for an immersion battery pack, the immersion battery pack also includes a push-pull member and a protruding block. The protruding block is protruding on the heat dissipation component. The push-pull member is provided with a groove, and the groove is snap-connected with the protruding block; a slide groove is provided at the bottom of the heat dissipation component, and the slide groove is used to be slidably connected to the slide rail on the bracket.

[0019] As an optional technical solution for an immersion battery pack, the immersion battery pack further includes a push-pull tooling, the push-pull member is provided with a threaded hole, and one end of the push-pull tooling is screwed into the threaded hole.

[0020] As an optional technical solution for an immersion battery pack, a lifting position is provided at the bottom of the raised block, and the lifting position is used to connect with a lifting tool.

[0021] As an optional technical solution for an immersion battery pack, the immersion battery pack also includes a cover body, a sealing ring and an explosion-proof valve. The sealing ring is arranged around the circumference of the cover body, the cover body is covered on the shell, and the explosion-proof valve is arranged on the cover body, and the explosion-proof valve is connected to the accommodating chamber.

[0022] The beneficial effects of the present invention include at least:

[0023] The present invention provides an immersion battery pack comprising a housing, battery cells, and a heat dissipation assembly. The housing comprises a chamber containing a coolant in a static state. The battery cells are immersed in the coolant. The heat dissipation assembly is disposed on at least one side of the housing and is configured to dissipate heat from the coolant.

[0024] In the above-mentioned submerged battery pack, the coolant in the housing is in a static state—that is, the coolant is static and does not circulate. The battery cells immersed in the coolant exchange heat with the coolant to reduce their temperature. Since the coolant is in a static state, there is no need for an oil pump to circulate the coolant, as in the prior art. The operation of an oil pump consumes electricity, but this design eliminates this energy consumption by eliminating the oil pump, thereby reducing energy consumption. Since the heat generated by the oil pump is not transferred to the coolant, the coolant's own temperature rise after absorbing the heat generated by the battery cells is relatively small. Therefore, the cooling capacity required during operation of the refrigeration system is relatively reduced, thereby reducing the system's power loss and further reducing energy consumption. Furthermore, the coolant in this design does not circulate, avoiding the performance degradation caused by the oil pump stirring the coolant, which can cause friction, collisions, and interaction with components such as piping. Furthermore, the housing of the present invention does not have complex piping or an oil pump, simplifying the structure of the submerged battery pack. This simplified structure means fewer potential coolant leak points, thereby reducing the risk of coolant leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 is a schematic structural diagram of an immersion battery pack provided by an embodiment of the present invention;

[0027] Figure 2 is an exploded view of an immersed battery pack provided in an embodiment of the present invention;

[0028] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0029] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 5 yes Figure 2 A partial enlarged view of point C in the middle.

[0031] Reference numerals

[0032] 10. Housing; 11. Accommodating chamber; 12. Fixing beam; 121. Second fixing hole; 20. Heat dissipation assembly; 21. First heat dissipation fin; 22. Second heat dissipation fin; 23. Heat dissipation box; 24. Fan; 25. Connector; 251. First fixing hole; 30. Push-pull member; 31. Groove; 32. Threaded hole; 40. Protrusion; 41. Lifting position; 50. Cover; 60. Explosion-proof valve; 70. Interface assembly; 71. Positive connector; 72. Negative connector; 73. Manual maintenance switch; 74. Communication interface;

[0033] 100. Bracket. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] This embodiment provides an immersion-type battery pack, in which the coolant is statically immersed in the shell, without the need for an oil pump for circulation, thereby reducing energy consumption and reducing the performance degradation of the coolant; and can reduce the risk of coolant leakage.

[0042] like Figure 1-Figure 2 As shown, the submerged battery pack mainly includes a housing 10, a battery cell (not shown in the figure), and a heat dissipation assembly 20. The housing 10 is provided with a receiving chamber 11, which is provided with a coolant in a static state. The battery cell is immersed in the coolant. The heat dissipation assembly 20 is provided on at least one side of the housing 10 and is configured to dissipate heat from the coolant.

[0043] Based on the above design, the coolant within the housing 10 of this embodiment is in a static state—that is, the coolant is static and does not circulate. The battery cells immersed in the coolant exchange heat with the coolant to reduce their temperature. Since the coolant is in a static state, there is no need for an oil pump to circulate the coolant, as in the prior art. The operation of an oil pump consumes electricity, but this design eliminates this energy consumption by eliminating the oil pump, thereby reducing energy consumption. Since the heat generated by the oil pump is not transferred to the coolant, the coolant's own temperature rise after absorbing the heat generated by the battery cells is relatively small. Therefore, the cooling capacity required during operation of the refrigeration system is relatively reduced, thereby reducing the system's power loss and further reducing energy consumption. Furthermore, the coolant in this design does not circulate, avoiding the performance degradation caused by friction, collisions, and interaction with components such as piping, which occurs in the prior art due to agitation by the oil pump. Furthermore, the housing 10 of this design lacks complex piping and oil pumps, simplifying the structure of the submerged battery pack. This simplified structure reduces potential leak points, thereby reducing the risk of coolant leaks.

[0044] In some optional embodiments, the housing 10 is made of aluminum alloy, which has both thermal conductivity and strength. The coolant can be a synthetic ester cooling oil with low viscosity, high thermal stability and good insulation performance.

[0045] For example, in this embodiment, two heat dissipation components 20 may be provided, and the two heat dissipation components 20 are respectively located on two opposite sides of the housing 10 to improve the heat dissipation efficiency of the coolant.

[0046] like Figure 2 and Figure 4 As shown, the heat dissipation assembly 20 in this embodiment includes first heat dissipation fins 21, second heat dissipation fins 22, and a heat dissipation housing 23. The first heat dissipation fins 21 are protruding from the inner wall of the housing 10 and are in contact with the coolant. The second heat dissipation fins 22 are disposed within the heat dissipation housing 23. One side of the heat dissipation housing 23 is connected to the outer wall of the housing 10, so that heat from the coolant can be transferred to the second heat dissipation fins 22 through the first heat dissipation fins 21.

[0047] The arrangement of the first and second fins 21, 22, with the first fins 21 protruding from the inner wall of the housing 10 and in direct contact with the coolant, increases the contact area between the coolant and the housing 10 and accelerates heat transfer. Direct contact between the first fins 21 and the coolant eliminates the need for complex piping, reducing manufacturing costs and the risk of leakage for the submerged battery pack. The second fins 22 further transfer heat from the coolant to the exterior of the submerged battery pack, improving overall heat dissipation efficiency.

[0048] Optionally, the heat dissipation box 23 and the housing 10 may also be designed as an integrally formed structure, or may be detachably connected by bolts.

[0049] Furthermore, the heat dissipation assembly 20 further includes a fan 24, which is disposed on at least one side of the heat dissipation box 23 and is configured to dissipate heat from the second heat dissipation fins 22. The fan 24 pushes air through the second heat dissipation fins 22, forming forced convection and further improving heat dissipation efficiency.

[0050] For example, the fan 24 in this embodiment is a brushless DC fan with a rated power of 12V or 24V. The air volume can be adjusted according to the heat dissipation requirements. The fan 24 is installed at the front end of the heat dissipation box 23 and guides the airflow to the second heat dissipation fins 22 through the air guide. In this embodiment, multiple fans 24 can be provided according to actual needs. For example, three fans 24 can be provided for each heat dissipation assembly 20.

[0051] In this embodiment, the heat dissipation housing 23 is provided with a heat dissipation chamber. One side of the heat dissipation housing 23 is thermally connected to the outer wall of the housing 10. Specifically, one side of the heat dissipation housing 23 can be connected to the outer wall of the housing 10 by screws, so that one side of the heat dissipation housing 23 is tightly attached to the outer wall of the housing 10, facilitating the transfer of heat from the coolant. Second heat dissipation fins 22 are disposed within the heat dissipation chamber. Opposite sides of the second heat dissipation fins 22 are thermally connected to two opposing inner walls of the heat dissipation chamber. The second heat dissipation fins 22 and the inner wall of the heat dissipation chamber form a heat dissipation channel, which is connected to the environment outside the heat dissipation housing 23 via a fan 24. Heat from the coolant in the accommodating chamber 11 can be transferred to the housing 10 via the first heat dissipation fins 21. This heat is then transferred to the second heat dissipation fins 22 through the housing 10 and the heat dissipation housing 23. The second heat dissipation fins 22 then transfer this heat to the heat dissipation channel. Finally, the fan 24 dissipates the heat from the heat dissipation channel to the environment outside the heat dissipation housing 23, thereby achieving heat dissipation of the coolant.

[0052] like Figure 2 and Figure 4 As shown, the heat dissipation assembly 20 further includes a connector 25 disposed on the inner wall of the heat dissipation housing 23. The connector 25 is provided with a first fixing hole 251, which is configured to connect to the fan 24. The design of the connector 25 and the first fixing hole 251 facilitates installation of the fan 24, eliminating the need for an additional mounting bracket. This provides a more secure connection between the fan 24 and the heat dissipation housing 23, reducing the risk of vibration and loosening.

[0053] For example, connector 25 is made of aluminum alloy and is bolted to the inner wall of heat sink housing 23. First fixing hole 251 is designed as a countersunk hole to mate with the mounting stud of fan 24, ensuring installation accuracy. The surface of connector 25 is treated with an anti-oxidation treatment to improve corrosion resistance.

[0054] In some optional embodiments, multiple first fins 21 and multiple second fins 22 are provided, and the multiple first fins 21 and multiple second fins 22 are arranged at equal intervals. Equally spaced first fins 21 and second fins 22 ensure even heat distribution, preventing local overheating or uneven heat dissipation. This also facilitates air flow within the heat dissipation box 23, improving heat dissipation efficiency.

[0055] For example, the first heat dissipating fins 21 and the second heat dissipating fins 22 are designed to be arranged at equal intervals of 10 mm. The height and thickness of the first heat dissipating fins 21 and the second heat dissipating fins 22 are designed according to heat dissipation requirements to ensure efficient heat dissipation under different working conditions.

[0056] For example, the shapes of the first heat dissipating fins 21 and the second heat dissipating fins 22 can be set to be wavy, needle-shaped, flat, etc.

[0057] like Figure 2 and Figure 3 As shown, in this embodiment, a fixing beam 12 is disposed within the accommodating chamber 11. The fixing beam 12 is provided with a second fixing hole 121, which is configured to connect with the battery cell. The design of the fixing beam 12 and the second fixing hole 121 securely secures the battery cell, preventing displacement during transportation or vibration, and improving the stability and reliability of the battery cell installation.

[0058] For example, the fixing beam 12 can be made of high-strength aluminum alloy and designed in an I-shaped structure to improve rigidity, and the fixing beam 12 can be welded to the bottom wall of the accommodating chamber 11. The second fixing hole 121 is designed as an M4-M6 threaded mounting hole to match the mounting post at the bottom of the battery cell.

[0059] like Figure 2 and Figure 5 As shown, the immersed battery pack in this embodiment also includes a push-pull member 30, a protruding block 40 and a push-pull tooling (not shown in the figure), the protruding block 40 is protruding from the heat dissipation box 23 of the heat dissipation assembly 20, and a groove 31 is provided on the push-pull member 30, and the groove 31 is snap-connected with the protruding block 40; a threaded hole 32 is provided on the push-pull member 30, and one end of the push-pull tooling is screwed into the threaded hole 32; a slide groove (not shown in the figure) is provided at the bottom of the heat dissipation assembly 20, and the slide groove is used to slide with the slide rail (not shown in the figure) on the bracket 100.

[0060] For example, the push-pull tool in this embodiment can be provided with a handle to facilitate the operator to grasp and improve the operating efficiency. The type of the handle can be provided as an "L-shape".

[0061] The push-pull member 30 is snap-connected with the protruding block 40, the handle is threadedly connected to the threaded hole 32 on the protruding block 40, and the slide groove at the bottom of the heat dissipation component 20 is slidably connected to the slide rail on the bracket 100. When the maintenance personnel need to move or install the immersion battery pack, the maintenance personnel can grasp the handle and pull the immersion battery pack out of the bracket 100 by pulling the handle, which is convenient to operate and improves work efficiency.

[0062] In some optional embodiments, the push-pull member 30 is made of high-strength engineering plastic with a non-slip textured surface. The protrusion 40 and the groove 31 utilize a snap-fit ​​design to ensure a secure connection. The slideway is designed as a dovetail groove that mates with the slide rail of the bracket 100 to prevent derailment.

[0063] Please continue to refer to Figure 2 and Figure 5The bottom of the raised block 40 is provided with a lifting position 41 for connecting to a lifting fixture. The design of the lifting position 41 enables the submerged battery pack to be lifted to a high position to adapt to different installation scenarios. At the same time, manual handling is avoided during the lifting process, reducing safety hazards.

[0064] like Figure 1-Figure 2 As shown, the submerged battery pack also includes a cover 50, a sealing ring, and an explosion-proof valve 60. The sealing ring is arranged around the circumference of the cover 50, which is covered on the shell 10. The explosion-proof valve 60 is arranged on the cover 50 and communicates with the accommodating chamber 11. The sealing ring ensures the seal between the cover 50 and the shell 10 to prevent coolant leakage. At the same time, the sealing design isolates external water vapor and oxygen, reducing the risk of coolant oxidation and deterioration. The explosion-proof valve 60 automatically releases pressure in the event of thermal runaway of the battery cell, preventing the shell 10 from rupturing due to excessive internal pressure.

[0065] Optionally, the cover 50 is made of aluminum alloy with an oxidized surface treatment to improve corrosion resistance. The sealing ring is made of oil-resistant rubber (such as EPDM) and compressed by 20%-30% to ensure a good seal. The explosion-proof valve 60 adopts a two-way opening design, which can both relieve pressure and prevent the entry of external air. The cover 50 is connected to the housing 10 with high-strength bolts to ensure connection strength and sealing.

[0066] like Figure 1-Figure 2 As shown, an interface assembly 70 is also provided on the outer wall of the shell 10 in this embodiment. The interface assembly 70 includes a positive connector 71, a negative connector 72, a manual maintenance switch 73 and a communication interface 74. The setting of the interface assembly 70 facilitates the rapid docking of the submerged battery pack with the external system.

[0067] Specifically, the positive connector 71 and the negative connector 72 are both connected to the external circuit and serve as power exchange channels between the submerged battery pack and the external circuit (such as the junction box of the energy storage system and the PCS converter), outputting the DC power stored in the battery cell or receiving external charging power.

[0068] The manual maintenance switch 73 is connected to the main circuit of the submerged battery pack. When the submerged battery pack needs to be repaired (such as replacing battery cells or troubleshooting), the maintenance personnel can manually operate the MSD (i.e., the manual maintenance switch 73) to disconnect the main circuit and cut off the power connection between the submerged battery pack and the external system, avoiding the risk of electric shock and improving safety.

[0069] The communication interface 74 is connected to the external monitoring equipment. The setting of the communication interface 74 can collect the battery cell status parameters (voltage, temperature, SOC, SOH, etc.) in real time and transmit them to the external energy storage management system (EMS), so as to realize remote monitoring of the operating status of the immersed battery pack and fault warning; at the same time, it can receive control instructions from the EMS (such as charging and discharging strategy adjustment).

[0070] Obviously, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0071] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. Immersed battery pack, characterized in that, include: A housing (10), wherein a receiving chamber (11) is provided in the housing (10), a cooling liquid is provided in the receiving chamber (11), and the cooling liquid is in a static state; a battery cell, wherein the battery cell is immersed in the coolant; A heat dissipation component (20) is provided on at least one side surface of the housing (10), and the heat dissipation component (20) is configured to dissipate heat from the coolant.

2. The submerged battery pack according to claim 1, wherein: The heat dissipation assembly (20) comprises a first heat dissipation fin (21), the first heat dissipation fin (21) is protrudingly provided on the inner wall of the housing (10), and the first heat dissipation fin (21) is in contact with the coolant.

3. The submerged battery pack according to claim 2, wherein: The heat dissipation assembly (20) further includes a second heat dissipation fin (22) and a heat dissipation box (23), wherein the second heat dissipation fin (22) is arranged in the heat dissipation box (23), and one side of the heat dissipation box (23) is connected to the outer wall of the housing (10) so that the heat of the coolant can be transferred to the second heat dissipation fin (22) through the first heat dissipation fin (21).

4. The submerged battery pack according to claim 3, wherein: The first heat dissipation fins (21) and the second heat dissipation fins (22) are both provided in plurality, and the plurality of first heat dissipation fins (21) are arranged at equal intervals, and the plurality of second heat dissipation fins (22) are arranged at equal intervals.

5. The submerged battery pack according to claim 3, wherein: The heat dissipation assembly (20) further includes a fan (24), which is disposed on at least one side of the heat dissipation box (23), and the fan (24) is configured to dissipate heat for the second heat dissipation fins (22).

6. The submerged battery pack according to claim 5, characterized in that: A heat dissipation chamber is provided inside the heat dissipation box (23), and one side of the heat dissipation box (23) is thermally connected to the outer wall of the shell (10); the second heat dissipation fins (22) are provided in the heat dissipation chamber, and the opposite sides of the second heat dissipation fins (22) are thermally connected to the two opposite inner walls of the heat dissipation chamber respectively, and the second heat dissipation fins (22) and the inner wall of the heat dissipation chamber form a heat dissipation channel, and the heat dissipation channel is connected to the environment outside the heat dissipation box (23) through the fan (24); the heat of the second heat dissipation fins (22) can be transferred to the heat dissipation channel, and the fan (24) can transfer the heat of the heat dissipation channel to the environment outside the heat dissipation box (23).

7. The submerged battery pack according to claim 5, characterized in that: The heat dissipation assembly (20) further comprises a connecting member (25), wherein the connecting member (25) is arranged on the inner wall of the heat dissipation box (23), and a first fixing hole (251) is provided on the connecting member (25), and the first fixing hole (251) is configured to be connected to the fan (24).

8. The submerged battery pack according to claim 1, wherein: A fixing beam (12) is provided in the accommodating chamber (11), a second fixing hole (121) is provided on the fixing beam (12), and the second fixing hole (121) is configured to be connected to the battery core.

9. The submerged battery pack according to claim 1, wherein: The submerged battery pack further comprises a push-pull member (30) and a protruding block (40), wherein the protruding block (40) is protrudingly arranged on the heat dissipation assembly (20), and a groove (31) is provided on the push-pull member (30), wherein the groove (31) is snap-connected with the protruding block (40); a slide groove is provided at the bottom of the heat dissipation assembly (20), and the slide groove is used for sliding connection with a slide rail on the bracket (100).

10. The submerged battery pack according to claim 9, wherein: The submerged battery pack further comprises a push-pull tool, a threaded hole (32) is provided on the push-pull member (30), and one end of the push-pull tool is screwed into the threaded hole (32).

11. The submerged battery pack according to claim 9, wherein: A hoisting position (41) is provided at the bottom of the protruding block (40), and the hoisting position (41) is used to be connected to a hoisting tool.

12. The submerged battery pack according to any one of claims 1 to 11, characterized in that: The submerged battery pack further comprises a cover (50), a sealing ring and an explosion-proof valve (60), wherein the sealing ring is arranged around the circumference of the cover (50), the cover (50) is covered on the shell (10), and the explosion-proof valve (60) is arranged on the cover (50), and the explosion-proof valve (60) is communicated with the accommodating chamber (11).

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