Submersible battery pack

Abstract

The utility model relates to battery pack technical field especially, more particularly to a kind of submerged battery pack.The submerged battery pack includes shell, electric core and heat dissipation component. Among them, housing chamber is provided in shell, cooling liquid is provided in housing chamber, and cooling liquid is in static state.Electric core is immersed in cooling liquid.Heat dissipation component is arranged on at least one side of shell, and heat dissipation component is configured to dissipate heat to cooling liquid.Cooling liquid in the submerged battery pack is statically immersed in shell, without circulating by oil pump, reduce energy consumption, reduce the performance degradation phenomenon of cooling liquid;Meanwhile, it can also reduce the risk of cooling liquid leakage.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to an immersion battery pack. Background Technology

[0002] With continuous technological advancements, 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 for future battery packs. This technology involves direct contact between the energy storage cells and specially formulated cooling oil, completely immersing the cells in the insulating cooling oil. Coupled with an oil circulation system and a refrigeration system, the cooling oil serves as the heat dissipation medium, enabling rapid heat transfer and dissipation. This ensures that the cells are always maintained within the optimal temperature range, guaranteeing the stable operation of the energy storage device.

[0003] Current submersible battery packs completely immerse the battery cells in a sealed oil cylinder. The insulating cooling oil within 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 pump to the insulating cooling oil, increasing cooling capacity requirements and consequently increasing cooling energy consumption. The continuous agitation of the insulating cooling oil by the pump accelerates its performance degradation, shortening its lifespan. Furthermore, the oil pumps in current technology are complex and costly, requiring extensive piping to transport the insulating cooling oil, which is prone to leaks due to poor sealing.

[0004] Therefore, there is an urgent need to design an immersion battery pack to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to propose an immersion battery pack in which the coolant is statically submerged in the casing, eliminating the need for an oil pump for circulation, thereby reducing energy consumption and minimizing coolant performance degradation; it also reduces the risk of coolant leakage.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides an immersion battery pack, comprising:

[0008] The housing has a receiving chamber inside, and the receiving chamber contains coolant, which is in a static state.

[0009] The battery cell is immersed in the coolant;

[0010] A heat dissipation assembly is disposed on at least one side 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 component includes a first heat dissipation fin, which protrudes from the inner wall of the housing and is in contact with the coolant.

[0012] As an optional technical solution for an immersion battery pack, the heat dissipation assembly further includes a second heat dissipation fin and a heat dissipation housing. The second heat dissipation fin is disposed in the heat dissipation housing, and one side of the heat dissipation housing is connected to the outer wall of the housing 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, both the first heat dissipation fins and the second heat dissipation fins are provided in multiples, with the multiple first heat dissipation fins arranged at equal intervals and the multiple second heat dissipation fins arranged at equal intervals.

[0014] As an alternative technology for immersion battery packs, the heat dissipation assembly further includes a fan disposed on at least one side of the heat dissipation housing, and the fan is configured to dissipate heat from the second heat dissipation fins.

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

[0016] As an optional technology solution for an immersion battery pack, the heat dissipation component further includes a connector disposed on the inner wall of the heat dissipation box, and the connector is provided with a first fixing hole configured to connect with the fan.

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

[0018] As an optional technical solution for an immersion battery pack, the immersion battery pack further includes a push-pull component and a protrusion. The protrusion protrudes from the heat dissipation assembly, and the push-pull component is provided with a groove, which is engaged with the protrusion. The bottom of the heat dissipation assembly is provided with a sliding groove, which is used to slide with a 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 fixture, the push-pull component being provided with a threaded hole, and one end of the push-pull fixture being screwed into the threaded hole.

[0020] As an optional technical solution for immersion battery packs, the bottom of the protrusion is provided with a lifting position, which is used to connect with lifting fixtures.

[0021] As an optional technical solution for an immersion battery pack, the immersion battery pack further includes a cover, a sealing ring, and an explosion-proof valve. The sealing ring is arranged around the periphery of the cover, the cover is placed on the housing, and the explosion-proof valve is disposed on the cover and communicates with the accommodating chamber.

[0022] The beneficial effects of this utility model include at least the following:

[0023] This invention provides an immersion battery pack, which includes a housing, battery cells, and a heat dissipation assembly. The housing has a accommodating chamber containing coolant, which is 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 this submersible battery pack, the coolant inside the casing is in a static state, meaning it does not circulate. The battery cells submerged in the coolant exchange heat with it to lower their temperature. Because the coolant is static, there is no need for an oil pump to drive its circulation, as in existing technologies. Oil pumps consume electrical energy, but this design eliminates this energy consumption, thus reducing energy consumption. Since no heat from the oil pump is transferred to the coolant, the coolant's temperature rise after absorbing heat from the battery cells is relatively small. Therefore, the cooling capacity required by the cooling system is reduced, further lowering energy consumption. Furthermore, the non-circulating coolant in this design avoids the performance degradation problems caused by friction, collisions, and interactions with pipes and other components due to oil pump agitation, as seen in existing technologies. Moreover, the absence of complex pipes and oil pumps inside the casing simplifies the submersible battery pack structure. This simplification reduces potential coolant leakage points, thus lowering the risk of leaks. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the immersion battery pack provided in this embodiment of the present invention;

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

[0028] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle;

[0030] Figure 5 yes Figure 2 A magnified view of a section at point C.

[0031] Figure Labels

[0032] 10. Housing; 11. Receiving 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 component; 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 Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] This embodiment provides an immersion battery pack in which the coolant is statically submerged in the casing, eliminating the need for an oil pump for circulation, thus reducing energy consumption and minimizing coolant performance degradation; it also reduces the risk of coolant leakage.

[0042] like Figures 1-2 As shown, the submersible battery pack mainly includes a housing 10, battery cells (not shown), and a heat dissipation assembly 20. The housing 10 has a receiving chamber 11 containing coolant, which is in a static state. The battery cells are submerged in the coolant. The heat dissipation assembly 20 is disposed 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 inside the housing 10 in this embodiment is in a static state, meaning it does not circulate. The battery cells immersed in the coolant exchange heat with the coolant to reduce their temperature. Since the coolant is static, there is no need for an oil pump to drive its circulation, as in existing technologies. Oil pumps consume electrical energy, but this design eliminates this energy consumption, thus reducing energy consumption. Because no heat from the oil pump is transferred to the coolant, the coolant's temperature rise after absorbing heat from the battery cells is relatively small. Therefore, the cooling capacity required by the cooling system is reduced, further lowering energy consumption. Furthermore, the non-circulating coolant in this design avoids the performance degradation problems caused by friction, collisions, and interactions with pipes and other components due to oil pump agitation, as seen in existing technologies. Moreover, the housing 10 in this design lacks complex pipes and oil pumps, simplifying the structure of the submerged battery pack. This simplification reduces potential leakage points, thereby lowering the risk of coolant leakage.

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

[0045] For example, in this embodiment, the heat dissipation component 20 can be set as two, 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 a first heat dissipation fin 21, a second heat dissipation fin 22, and a heat dissipation housing 23. The first heat dissipation fin 21 protrudes from the inner wall of the housing 10 and is in contact with the coolant. The second heat dissipation fin 22 is disposed inside the heat dissipation housing 23, and one side of the heat dissipation housing 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.

[0047] With the arrangement of the first heat dissipation fin 21 and the second heat dissipation fin 22, the first heat dissipation fin 21 protrudes from the inner wall of the housing 10 and is in direct contact with the coolant, increasing the contact area between the coolant and the housing 10 and accelerating heat transfer. The first heat dissipation fin 21, being in direct contact with the coolant, eliminates the need for complex piping, reducing the manufacturing cost and leakage risk of the submerged battery pack. The second heat dissipation fin 22 can further transfer the heat from the coolant to the outside of the submerged battery pack, improving overall heat dissipation efficiency.

[0048] Alternatively, the heat sink 23 and the shell 10 can be designed as a single molded structure, or they can be detachably connected by bolts.

[0049] Furthermore, the heat dissipation assembly 20 also includes a fan 24, which is disposed on at least one side of the heat dissipation housing 23 and is configured to dissipate heat from the second heat dissipation fins 22. The fan 24 pushes airflow 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 DC brushless fan with a rated power of 12V or 24V, and the airflow 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 shroud. In this embodiment, multiple fans 24 can be set according to actual needs. For example, each heat dissipation component 20 is equipped with three fans 24.

[0051] In this embodiment, the heat sink 23 has a heat dissipation chamber inside. One side of the heat sink 23 is thermally connected to the outer wall of the housing 10. Specifically, one side of the heat sink 23 can be connected to the outer wall of the housing 10 with screws to ensure a tight fit between the heat sink 23 and 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. The opposite sides of the second heat dissipation fins 22 are thermally connected to the opposite inner walls of the heat dissipation chamber, forming a heat dissipation channel with the inner wall of the heat dissipation chamber. This heat dissipation channel is connected to the environment outside the heat sink 23 via a fan 24. The heat from the coolant in the housing 11 is transferred to the housing 10 via the first heat dissipation fins 21. This heat then passes sequentially through the housing 10 and the heat sink 23 to the second heat dissipation fins 22. The second heat dissipation fins 22 then transfer this heat to the heat dissipation channel. Finally, under the action of the fan 24, the heat from the heat dissipation channel is dissipated to the environment outside the heat sink 23, thereby achieving the cooling effect on the coolant.

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

[0053] For example, the connector 25 is made of aluminum alloy and is fixed to the inner wall of the heat sink 23 by bolts. The first fixing hole 251 is designed as a countersunk hole to match the mounting studs of the fan 24, ensuring installation accuracy. The surface of the connector 25 is treated with an anti-oxidation process to improve corrosion resistance.

[0054] In some optional embodiments, multiple first heat dissipation fins 21 and multiple second heat dissipation fins 22 are provided, with the multiple first heat dissipation fins 21 arranged at equal intervals and the multiple second heat dissipation fins 22 arranged at equal intervals. The equal-interval arrangement of the first heat dissipation fins 21 and the second heat dissipation fins 22 can ensure uniform heat distribution and avoid local overheating or uneven heat dissipation. At the same time, it also facilitates airflow within the heat dissipation housing 23, improving heat dissipation efficiency.

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

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

[0057] like Figure 2 and Figure 3 As shown, in this embodiment, a fixing beam 12 is provided inside the accommodating chamber 11, and a second fixing hole 121 is provided on the fixing beam 12. The second fixing hole 121 is configured to connect with the battery cell. The design of the fixing beam 12 and the second fixing hole 121 can firmly fix the battery cell, avoid displacement of the battery cell during transportation or vibration, and improve 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 as an "I" shape 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 immersion battery pack in this embodiment also includes a push-pull member 30, a protrusion 40, and a push-pull fixture (not shown in the figure). The protrusion 40 protrudes from the heat dissipation box 23 of the heat dissipation assembly 20. The push-pull member 30 is provided with a groove 31, which is snapped into the protrusion 40. The push-pull member 30 is provided with a threaded hole 32, and one end of the push-pull fixture is screwed into the threaded hole 32. The bottom of the heat dissipation assembly 20 is provided with a sliding groove (not shown in the figure), which is used to slide in connection with the slide rail (not shown in the figure) on the bracket 100.

[0060] For example, the push-pull fixture in this embodiment can be configured as a handle, which is convenient for operators to grip and improves operating efficiency. The handle type can be configured as "L-shaped".

[0061] The push-pull component 30 is snapped into the protrusion 40, and the handle is threaded into the threaded hole 32 on the protrusion 40. The slide groove at the bottom of the heat dissipation component 20 is slidably connected to the slide rail on the bracket 100. When maintenance personnel need to move or install the submersible battery pack, they can grab the handle and pull the submersible battery pack out of the bracket 100 by pulling the handle. The operation is convenient and improves work efficiency.

[0062] In some alternative 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 are designed with a snap-fit ​​mechanism to ensure reliable connection. The slide is designed as a dovetail groove structure to match the slide rail of the bracket 100 and prevent derailment.

[0063] Please continue to refer to this. Figure 2 and Figure 5The bottom of the protrusion 40 is provided with a lifting position 41, which is used to connect with the lifting fixture. The design of the lifting position 41 allows the submersible battery pack to be lifted to a high place, adapting to different installation scenarios. At the same time, it avoids manual handling during the lifting process, reducing safety hazards.

[0064] like Figures 1-2 As shown, the submersible battery pack also includes a cover 50, a sealing ring, and an explosion-proof valve 60. The sealing ring is wrapped around the periphery of the cover 50, which covers the housing 10. The explosion-proof valve 60 is mounted on the cover 50 and communicates with the accommodating chamber 11. The sealing ring ensures the seal between the cover 50 and the housing 10, preventing coolant leakage. Simultaneously, 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 cells, preventing the housing 10 from rupturing due to excessive internal pressure.

[0065] Optionally, the cover 50 is made of aluminum alloy with an oxidized surface to improve corrosion resistance. The sealing ring is made of oil-resistant rubber (such as EPDM) with a compression ratio of 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 outside air from entering. The cover 50 is connected to the housing 10 by high-strength bolts to ensure connection strength and sealing.

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

[0067] Specifically, both the positive terminal connector 71 and the negative terminal connector 72 are connected to the external circuit and serve as a power exchange channel between the submerged battery pack and the external circuit (such as the combiner cabinet of the energy storage system or 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 submersible battery pack. When the submersible battery pack needs to be repaired (such as replacing cells or troubleshooting), maintenance personnel can manually operate the MSD (i.e., the manual maintenance switch 73) to disconnect the main circuit, cut off the power connection between the submersible battery pack and the external system, avoid the risk of electric shock, and improve safety.

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

[0070] Obviously, the above description is merely a preferred embodiment 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 various obvious changes, readjustments, and substitutions can be made without departing from the protection scope 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. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0071] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.

Claims

1. An immersion battery pack, characterized in that, include: The housing (10) has a receiving chamber (11) inside, and the receiving chamber (11) contains coolant, which is in a static state. The battery cell is immersed in the coolant; A heat dissipation assembly (20) is disposed on at least one side of the housing (10) and is configured to dissipate heat from the coolant. A fixing beam (12) is provided in the accommodating chamber (11), and a second fixing hole (121) is provided on the fixing beam (12), which is configured to be connected to the battery cell.

2. The immersion battery pack according to claim 1, characterized in that, The heat dissipation assembly (20) includes a first heat dissipation fin (21), which protrudes from the inner wall of the housing (10) and is in contact with the coolant.

3. The immersion battery pack according to claim 2, characterized in that, The heat dissipation assembly (20) further includes a second heat dissipation fin (22) and a heat dissipation box (23). The second heat dissipation fin (22) is disposed inside the heat dissipation box (23). One side of the heat dissipation box (23) is connected to the outer wall of the shell (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 immersion battery pack according to claim 3, characterized in that, The first heat dissipation fins (21) and the second heat dissipation fins (22) are both provided in multiples, and the multiple first heat dissipation fins (21) are arranged at equal intervals, and the multiple second heat dissipation fins (22) are arranged at equal intervals.

5. The immersion battery pack according to claim 3, characterized in that, The heat dissipation assembly (20) also includes a fan (24) disposed on at least one side of the heat dissipation housing (23) and configured to dissipate heat from the second heat dissipation fins (22).

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

7. The immersion battery pack according to claim 5, characterized in that, The heat dissipation assembly (20) also includes a connector (25), which is disposed on the inner wall of the heat dissipation box (23). The connector (25) has a first fixing hole (251) configured to connect to the fan (24).

8. The immersion battery pack according to claim 1, characterized in that, The submersible battery pack also includes a push-pull member (30) and a protrusion (40). The protrusion (40) protrudes from the heat dissipation assembly (20). The push-pull member (30) is provided with a groove (31), which is engaged with the protrusion (40). The bottom of the heat dissipation assembly (20) is provided with a sliding groove, which is used to slide with a slide rail on the bracket (100).

9. The immersion battery pack according to claim 8, characterized in that, The immersion battery pack also includes a push-pull fixture, on which a threaded hole (32) is provided, and one end of the push-pull fixture is screwed into the threaded hole (32).

10. The immersion battery pack according to claim 8, characterized in that, The bottom of the protrusion (40) is provided with a lifting position (41), which is used to connect with the lifting fixture.

11. The immersion battery pack according to any one of claims 1-10, characterized in that, The immersion battery pack also includes a cover (50), a sealing ring and an explosion-proof valve (60). The sealing ring is arranged around the periphery of the cover (50), the cover (50) is placed on the housing (10), and the explosion-proof valve (60) is arranged on the cover (50) and communicates with the accommodating chamber (11).

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