An underwater battery box and underwater energy storage system

Abstract

This application discloses an underwater battery box and an underwater energy storage system. The underwater battery box includes a box body, a turbine, and multiple battery modules. The box body has a cavity, an inlet, and an outlet, both of which are connected to the cavity. A hoisting fitting is provided on the box body. The turbine is disposed in the box body and provides water flow power, allowing water to enter the cavity through the inlet and exit through the outlet. Each battery module is disposed within the cavity and is electrically connected. The underwater energy storage system includes multiple underwater battery boxes. When the underwater battery box of this application is deployed in a water system, the water flow passing over the battery modules directly carries away the heat generated by the battery cells. The turbine can be turned on to increase the overall water flow velocity, carrying away more heat and thus improving heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an underwater battery box and an underwater energy storage system. Background Technology

[0002] With the increasing number of new energy storage devices, the requirements for heat dissipation of batteries in energy storage systems are becoming increasingly stringent. Many related technologies employ air cooling for battery heat dissipation, which involves installing air ducts and fans within the battery pack to drive ambient airflow over the cell surfaces and remove heat. Its advantages include simple structure and low deployment cost, but its heat dissipation efficiency is generally low under high power density scenarios and is easily limited by the inherent characteristics of air, such as low specific heat capacity and high sensitivity to ambient temperature, leading to nonlinear degradation of heat exchange efficiency. Some energy storage systems use water cooling for battery heat dissipation. These systems incorporate water-cooling plates within the battery pack, with the cells in contact with the plates. Heat is transferred indirectly to the cells by circulating coolant through the water-cooling plates. Compared to air cooling, this method significantly improves heat dissipation, but its efficiency still falls short under high-rate charge and discharge conditions. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an underwater battery box and an underwater energy storage system.

[0004] The present invention adopts the following technical solution:

[0005] The first aspect of this application provides an underwater battery box, comprising:

[0006] The housing has a cavity, an inlet and an outlet, both of which are connected to the cavity, and a hoisting fitting is provided on the housing;

[0007] Multiple battery modules are provided, each of which is disposed within the cavity and is electrically connected to the other battery modules.

[0008] A turbine is disposed in the housing and is used to provide water flow power so that water enters the cavity from the inlet and is discharged from the outlet.

[0009] Optionally, the inlet and the outlet are located on opposite sides of the housing;

[0010] Multiple turbines are installed in the housing, each turbine is located on one side of the outlet, and each turbine is arranged at intervals along the length of the outlet.

[0011] Optionally, the underwater battery box also includes a filter screen;

[0012] The filter screen is installed on the housing and covers the water inlet.

[0013] Optionally, the housing includes an upper plate, a lower plate, and a side plate connecting the upper plate and the lower plate;

[0014] The cavity, water inlet, and water outlet are formed between the upper plate, lower plate, and side plate.

[0015] Each of the battery modules is arranged in multiple rows and columns between the upper plate and the lower plate;

[0016] The turbine is located between the upper plate and the lower plate.

[0017] Optionally, the hoisting assembly is provided on the upper plate or the side plate.

[0018] Optionally, the side plate body includes two side plates;

[0019] The two side plates are respectively disposed on both sides of the upper plate, and the side plates are respectively connected to the upper plate and the lower plate;

[0020] The hoisting fitting part is provided on the side plate.

[0021] Optionally, the underwater battery box includes a splitter plate;

[0022] The flow divider is disposed in the cavity, and each flow divider is respectively connected to the upper plate and the lower plate.

[0023] Each of the aforementioned current distribution plates is arranged sequentially at intervals along the lower plate, and the current distribution plate is located between two corresponding battery modules.

[0024] Optionally, a positioning post is provided on one of the upper plate and the lower plate, and a positioning hole is provided on the other.

[0025] In the two underwater battery boxes stacked one on top of the other, the positioning post of one is inserted into the positioning hole of the other.

[0026] The second objective of this application is to provide an underwater energy storage system, comprising: a plurality of underwater battery boxes, each of which is submerged underwater and is electrically connected.

[0027] Optionally, the underwater energy storage system includes multiple clusters of battery boxes, with the underwater battery boxes in the same cluster stacked one on top of the other, and two adjacent underwater battery boxes connected and fixed by fasteners.

[0028] By adopting the above technical solution, this application has the following beneficial effects:

[0029] The underwater battery box of this application is deployed in a water system, and the water flow passing over the battery module can directly carry away the heat generated by the battery cells. The turbine can be turned on to increase the overall water flow rate, carrying away more heat and thus improving heat dissipation efficiency.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0032] Figure 1 This diagram illustrates the stacked state of multiple battery boxes in an energy storage system provided in this embodiment of the application.

[0033] Figure 2 This illustration shows a schematic diagram of the battery box structure in the energy storage system provided in an embodiment of this application;

[0034] Figure 3 This application shows a cross-sectional view of multiple battery modules in a battery box provided in an embodiment of the present application;

[0035] Figure 4 This is another perspective view showing multiple battery boxes stacked vertically in an energy storage system provided in an embodiment of this application.

[0036] In the diagram: 100, Battery box; 1, Box body; 11, Upper plate; 111, Positioning post; 12, Lower plate; 121, Positioning hole; 13, Side plate; 14, Lifting assembly; 15, Diverter plate; 2, Battery module; 21, Outer shell; 211, Spherical shell; 212, Base; 22, Battery pack; 23, Thermal adhesive; 3, Rigid tube; 4, Turbine; 5, Filter screen; 6, Fastener; a, Connection hole.

[0037] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" 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; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Example 1

[0042] See Figures 1 to 4 As shown in the figure, this application provides an underwater battery box 100, including: a box body 1, a turbine 4, and multiple battery modules 2. The box body 1 has a cavity, a water inlet, and a water outlet, both of which are connected to the cavity. A lifting fitting part 14 is provided on the box body 1. Each of the battery modules 2 is disposed within the cavity and is electrically connected; for example, the battery modules 2 can be connected in series or in parallel. The turbine 4 is disposed on the box body 1 and provides water flow power, allowing water to enter the cavity through the water inlet and exit through the water outlet. By providing the lifting fitting part 14 on the box body 1, this application allows for easy connection to lifting equipment, enabling it to be lifted and transferred underwater or above water. The lifting fitting part 14 may include a lifting ring disposed on the outer wall of the box body 1. After the battery box 100 is placed in the water system, its inlet is located upstream of the water flow, and its outlet is located downstream. Water flows smoothly from the inlet into the cavity and exchanges heat with each battery module 2 before flowing out through the outlet. When increased heat dissipation efficiency is needed, the turbine 4 can be activated to accelerate the overall water flow, carrying away more heat and thus improving heat dissipation efficiency. The water system can be a natural river, and the battery box 100 can be submerged within it.

[0043] In some possible implementations, the inlet and outlet are located on opposite sides of the housing 1, thereby preventing the water flow from changing direction, reducing water flow resistance, and preventing the water flow from exerting excessive force on the battery box 100.

[0044] In some possible implementations, multiple turbines 4 are disposed within the housing 1, each turbine 4 located on one side of the water outlet, and the turbines 4 are arranged sequentially at intervals along the length of the water outlet. The arrangement of multiple turbines 4 increases the water flow driving force and improves heat dissipation efficiency. The turbines 4 can be powered by the internal battery module 2. When the battery system is operating at low power, the turbines 4 do not need to operate; the water flow passes through the turbines 4, causing them to rotate, and the water flows into the cavity, passing through the spherical battery module, directly carrying away the heat generated by the battery cells. During full-power operation of the battery housing 100, the turbines 4 can be activated, increasing the overall flow rate and carrying away more heat through a larger volume of water.

[0045] In some possible implementations, such as Figure 2 As shown, the battery box 100 also includes a filter screen 5, which is disposed on the box body 1 and covers the water inlet. The function of the filter screen 5 is to prevent small animals and large particles in the water from entering the battery box 100 and causing damage to the system.

[0046] In some possible implementations, the housing 1 includes an upper plate 11, a lower plate 12, and a side plate 13 connecting the upper plate 11 and the lower plate 12. The upper plate 11, the lower plate 12, and the side plate 13 form the cavity, the water inlet, and the water outlet. Each of the battery modules 2 is arranged in multiple rows and columns between the upper plate 11 and the lower plate 12. The turbine 4 is located between the upper plate 11 and the lower plate 12.

[0047] In some possible implementations, the lifting engagement part 14 is disposed on the upper plate 11 or the side plate 13. Optionally, the side plate 13 includes two side plates, which are respectively disposed on both sides of the upper plate 11, and the side plates are respectively connected to the upper plate 11 and the lower plate 12, and the lifting engagement part 14 is disposed on the side plate. By providing the lifting engagement part 14 on the side plate, the surfaces of the upper plate 11 and the lower plate 12 of the battery box 100 are made flat, which facilitates the stacking of the battery boxes 100 to form a longitudinally multi-cluster battery box 100 assembly.

[0048] In some possible implementations, such as Figure 1 As shown, the battery box 100 includes a diverter plate 15 disposed within the cavity. Each diverter plate 15 is connected to the upper plate 11 and the lower plate 12, respectively. The diverter plates 15 are arranged sequentially at intervals along the lower plate 12, and are located between corresponding two battery modules 2. The diverter plate 15 serves to strengthen the structural strength of the box 1 and also facilitates the diversion of water inlet, ensuring that the water flow is evenly distributed within the box 1.

[0049] In some possible implementations, one of the upper plate 11 and the lower plate 12 is provided with a positioning post 111, and the other with a positioning hole 121. In the two stacked battery boxes 100, the positioning post 111 of one is inserted into the positioning hole 121 of the other. The cooperation between the positioning post 111 and the positioning hole 121 achieves the pre-positioning of the upper and lower battery boxes 100. During the process of transferring the battery box 100 to underwater using hoisting equipment, it is necessary to adjust the position of the upper battery box 100 so that the positioning post 111 and the positioning hole 121 of the upper and lower battery boxes 100 are engaged, so that the battery boxes 100 in the same row are aligned vertically.

[0050] like Figure 1 and Figure 4 As shown, this application also provides an energy storage system, including: multiple battery boxes 100, each of which is submerged underwater and electrically connected. The energy storage system includes multiple clusters of battery boxes 100, with the battery boxes 100 in the same cluster stacked vertically, and two adjacent battery boxes 100 connected and fixed by fasteners 6. For example, in two adjacent battery boxes 100, the upper plate 11 of one and the lower plate 12 of the other are provided with connecting holes a, and fasteners 6 are provided through the two connecting holes a to connect and fix the two. One of the two connecting holes a can be a threaded hole. Alternatively, the fastener 6 includes a bolt and a nut, the bolt passes through the connecting hole a on the upper plate 11 and the lower plate 12, the nut is threaded onto the bolt, and the head of the bolt and the nut are respectively confined to the lower plate 12 of the upper battery box 100 and the upper plate 11 of the lower battery box 100, thereby connecting and fixing the two battery boxes 100.

[0051] Example 2

[0052] See Figures 1 to 4As shown, based on the above embodiments, this application further details the underwater battery box 100, including: a box body 1, a water flow drive component (such as a turbine 4), and multiple battery modules 2. The box body 1 has a cavity, an inlet, and an outlet. The inlet and outlet are both connected to the cavity. The inlet and outlet are located on opposite sides of the box body 1, thereby preventing water flow deflection, reducing water flow resistance, and preventing excessive force exerted by the water flow on the battery box 100. Each battery module 2 is disposed within the cavity, with water flow gaps between adjacent battery modules 2, allowing the outer surface of each battery module 2 to contact the water flow, thus achieving good heat dissipation efficiency. The battery modules 2 have smooth outer surfaces, which can reduce impact resistance with water, allowing the flowing water to fully contact the surface of the battery modules 2 and avoiding the formation of dead zones. The battery modules 2 are electrically connected; for example, they can be connected in series or in parallel. A water flow drive component is installed in the housing 1, specifically at the water outlet or inlet, to provide water flow power. After the battery box 100 is placed in the water system, the water inlet of the battery box 100 is located upstream of the flowing water, and the water outlet of the battery box 100 is located downstream of the water system. The water flows smoothly from the inlet into the cavity and exchanges heat with each battery module 2 before flowing out from the outlet. When it is necessary to increase the heat dissipation efficiency, the water flow drive component can be activated to accelerate the overall water flow rate, carrying away more heat and thus improving the heat dissipation efficiency. The water system can be a natural river, and the battery box 100 can be submerged in the river.

[0053] In this application, each battery box 100 in the energy storage system is submerged in deep water and then fixed to the bottom. During low-power operation, the water flow drive is turned off, and automatic circulating water cooling is achieved through the principle of thermal expansion and contraction of water. The high-temperature battery modules heat the flowing water, accelerating its flow. During high-power heating of the battery modules, the water flow drive can be activated. A BMS module can also be installed on the battery box 100. The BMS module can acquire parameters of each cell in the battery module 2, such as temperature data. The BMS module can be electrically connected to the water flow drive, controlling its operating power, i.e., controlling the overall water flow speed, to regulate the temperature of the battery box 100, ensuring the battery temperature reaches the set value. For example, when the BMS module detects that the cell temperature in the battery module is higher than the set value, it can activate the water flow drive to accelerate the water flow. When the BMS module detects that the cell temperature in the battery module is lower than the set value, it can deactivate the water flow drive. The lowest water temperature at the bottom of the water system will not be lower than 0 degrees Celsius. Therefore, it is within the normal operating temperature range of the cells in battery module 2. Thus, no heating equipment is needed to heat the entire battery module 2 in low-temperature environments.

[0054] In some possible implementations, such as Figure 3As shown, the battery module 2 has a housing 21 and a battery pack 22. The housing 21 has a sealed cavity and a smooth outer surface, and the battery pack 22 is disposed in the sealed cavity.

[0055] The battery pack 22 may include multiple battery cells, each of which is housed within a sealed cavity. Water from the water system will not seep into the casing 21 and contact the battery pack 22, ensuring the normal and safe operation of the battery module 2. The casing 21 may be a metal component with good thermal conductivity, facilitating heat exchange through contact with water flow.

[0056] In some possible implementations, such as Figure 3 As shown, the outer shell 21 includes a spherical shell portion 211, which has a spherical outer surface. The sealing cavity is provided inside the spherical shell portion 211. The outer shell 21 and the housing 1 are detachably connected.

[0057] The outer casing 21 is roughly spherical or rugby-shaped with a smooth surface. The spherical structure provides the largest contact area with water, resulting in better heat exchange efficiency. The smooth surface of the spherical structure prevents impurities from adhering. The battery box 100 can have a cleaning program, which can be periodically activated. This program controls the high-speed rotation of the water flow driver, creating a high-speed water flow that washes away impurities adhering to the surface of the outer casing 21, thus facilitating direct contact between the outer casing 21 and the water for heat dissipation. It is important to note that the battery box 100 also has a high-efficiency heat dissipation program, which controls the rotation of the water flow driver to accelerate the water flow and improve heat dissipation efficiency. The difference between the cleaning program and the high-efficiency heat dissipation program is that the water flow driver operates at a higher speed in the cleaning program, meaning higher power and a faster water flow speed, but its usage frequency is generally low. In this embodiment, the outer casing 21 and the box 1 are detachably connected, allowing for easy replacement of the battery module 2. When a battery module 2 is damaged, it can be replaced with a new one.

[0058] In some possible implementations, such as Figure 3 As shown, the outer casing 21 includes a base 212, which is located outside the spherical shell portion 211 and connected to it. The base 212 protrudes from the surface of the spherical shell portion 211, and a connection hole can be provided on the base 212. One end of a fastener passes through the housing 1 and connects to the connection hole, while the other end of the fastener is confined to the housing 1. The fastener can be a bolt, with the stud passing through the threaded hole on the base 212 and the nut confined to the outer surface of the housing 1. The end of the spherical shell portion 211 facing away from the base 212 can abut against the inner wall of the housing 1, resulting in good assembly stability of the battery module 2.

[0059] In some possible implementations, such as Figure 3As shown, thermally conductive adhesive 23 is filled between the battery pack 22 and the inner wall of the sealed cavity. By filling the space between the battery pack 22 and the inner wall of the spherical shell 211 with thermally conductive adhesive 23, the heat released by the battery pack 22 can be conducted to the spherical shell 211 for heat exchange with the water flowing through the spherical shell 211, thus improving the heat exchange efficiency. In addition to its function of conducting heat, the thermally conductive adhesive 23 also serves to seal the battery pack 22. It should be noted that the outer shell 21 may include two half-shells. The battery pack 22 can be placed on one half-shell first, and after adjusting its position, the other half-shell can be attached to seal the two half-shells together. Thermally conductive adhesive 23 is then poured into the sealed cavity between the two half-shells to seal and encapsulate the battery pack 22.

[0060] In some possible implementations, the housing 1 includes an upper plate 11, a lower plate 12, and a side plate 13 connecting the upper plate 11 and the lower plate 12. The upper plate 11, the lower plate 12, and the side plate 13 form the cavity, the water inlet, and the water outlet. Each of the battery modules 2 is arranged in multiple rows and columns between the upper plate 11 and the lower plate 12.

[0061] The housing 1 mainly includes an upper plate 11, a lower plate 12, and a side plate 13. The overall structure is simple, and a large cavity is formed inside to facilitate the flow of water. The battery modules 2 are arranged horizontally in multiple rows and columns in the cavity, and there are gaps between each battery module 2 to allow water to fully contact each battery module 2 when entering the cavity.

[0062] The base 212 on the outer shell 21 of the battery module 2 can be attached to the lower plate 12, and fasteners pass through the lower plate 12 and are connected to the base 212 of the battery module 2. The end of the spherical shell portion 211 facing away from the base 212 can abut against the upper plate 11. The battery module 2 is located between the upper plate 11 and the lower plate 12. A ball support portion (not shown) can be provided on the side of the upper plate 11 facing the lower plate 12. The ball support portion has a concave arc-shaped surface, and the side of the spherical shell portion 211 of the battery module 2 facing away from the base 212 can be attached to the concave arc-shaped surface of the ball support portion. The battery module 2 is stably and reliably fixed between the upper plate 11 and the lower plate 12. The side plate 13 can be detachably connected to the upper plate 11 and the lower plate 12 respectively, or detachably connected to only one of the upper plate 11 and the lower plate 12. This structural design facilitates the assembly and disassembly of each battery module 2.

[0063] In some possible implementations, a quick-connect socket is provided on the surface of the housing 21 of the battery module 2, and a quick-connect plug is provided at the end of the cable connecting the battery module 2 (the cable includes a power line and a communication line). The quick-connect plug and the quick-connect socket are detachable and sealed together. The quick-connect plug and the quick-connect socket can be easily disassembled and assembled, and after being plugged in, the two will seal together to prevent leakage.

[0064] In some possible implementations, when the quick-connect plug is removed from the quick-connect socket, the conductor inside the socket can be sealed. Reinserting the quick-connect plug then establishes an electrical connection between the plug and socket. It should be noted that there are many existing technologies for quick-connect plugs and sockets with quick-plug capability, self-sealing sockets, and sealed fits. For example, there are numerous commercially available waterproof quick-connect electrical connectors. This application can directly use these commercially available products; this application does not improve upon existing quick-connect plugs and sockets.

[0065] In some possible implementations, the battery box 100 includes a rigid tube 3, both ends of which are detachably connected to the outer shell 21 of the corresponding battery module 2. The cables connecting the battery modules 2 pass through the rigid tube 3. The design of the rigid tube 3 facilitates the connection of the outer shell 21 of two adjacent battery modules 2, improving the integrity of each battery module 2, and also protects the cables connecting the battery modules 2, preventing deformation of the cables under water flow and thus preventing them from easily breaking at the surface of the outer shell 21.

[0066] The surface of the outer casing 21 can be provided with openings to facilitate the installation of quick-connect sockets and quick-connect plugs. These openings also allow for the injection of thermally conductive adhesive 23 into the sealed cavity during battery pack 22 installation. The quick-connect plug or the quick-connect socket is then installed on the opening to seal it. An annular slot can be provided on the outer side of the opening on the outer casing 21. The rigid tube 3 can be inserted into the annular slot to connect and fix the rigid tube 3 to the outer casing 21 of the battery module 2. Threaded grooves can be provided on the inner or outer annular wall of the annular slot, and threaded grooves can be provided on the outer or inner wall of the rigid tube, allowing the rigid tube to be threaded onto the outer casing 21.

[0067] In some possible implementations, the battery box 100 includes a counterweight (not shown) detachably connected to the box body 1, the counterweight being located outside the cavity.

[0068] The counterweight can be attached to the lower plate 12, the upper plate 11, or the side plate 13 to increase the density and weight of the battery box 100, making it easier for the battery box 100 to sink underwater and be fixed underwater, preventing it from easily shifting.

[0069] The counterweight can be a metal plate, fitted and connected to the lower plate 12 via fasteners 6. Alternatively, the counterweight can be a spherical structure with the same appearance as the battery module 2, with multiple counterweights and multiple battery modules 2 arranged in multiple rows and columns between the upper plate 11 and the lower plate 12. The counterweight and battery module 2 have the same appearance and structure, and also have a base; their assembly method with the battery module 2 and the housing 1 is the same.

[0070] This application also provides a water-immersed energy storage system, including: multiple battery boxes 100, each of which is submerged underwater and electrically connected. The water-immersed energy storage system is similar to a conventional energy storage system, also including a high-voltage box, a power distribution junction box, and a PCS device, etc. The difference is that in the water-immersed energy storage system, at least some of the battery boxes 100 are located within a water system and are submerged underwater. Other structures, such as the high-voltage box, power distribution junction box, and PCS device, can be located either underwater or above water. When located above water, the cables connecting the battery boxes 100 can extend above the water for easy connection to the high-voltage box or power distribution junction box.

[0071] It is important to note that the power distribution combiner cabinet and PCS device can be installed on the bank of a waterway. A support platform can be installed on the water, and at least some of the high-voltage box, power distribution combiner cabinet, and PCS device can be mounted on this platform. The support platform can be a floating platform on the water surface, or it can be a suspended platform above the water surface, fixed by supports installed underwater or on the bank. The support platform is part of the energy storage system structure.

[0072] The immersion energy storage system may also include hoisting equipment for hoisting the battery box 100, transferring the battery box 100 from above water to underwater, or lifting the battery box 100 from underwater to above water to achieve the replacement, maintenance, or construction of the battery box 100.

[0073] It should be noted that the hoisting equipment can lift multiple battery boxes 100 simultaneously, or transfer only one battery box 100 at a time. The battery modules 2 of adjacent battery boxes 100 can also be connected via cables with quick-connect connectors. Cable connections can be made on or underwater.

[0074] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An underwater battery box, characterized by, include: The housing has a cavity, an inlet and an outlet, both of which are connected to the cavity, and a hoisting fitting is provided on the housing; Multiple battery modules are provided, each of which is disposed within the cavity and is electrically connected to the other battery modules. A turbine is disposed in the housing and is used to provide water flow power so that water enters the cavity from the inlet and is discharged from the outlet.

2. The underwater battery box according to claim 1, characterized in that, The inlet and the outlet are located on opposite sides of the tank. Multiple turbines are installed in the housing, each turbine is located on one side of the outlet, and each turbine is arranged at intervals along the length of the outlet.

3. The underwater battery box of claim 1, wherein, Including filters; The filter screen is installed on the housing and covers the water inlet.

4. The underwater battery box of claim 1, wherein, The enclosure includes an upper plate, a lower plate, and a side plate connecting the upper plate and the lower plate; The cavity, water inlet, and water outlet are formed between the upper plate, lower plate, and side plate. Each of the battery modules is arranged in multiple rows and columns between the upper plate and the lower plate; The turbine is located between the upper plate and the lower plate.

5. The underwater battery box of claim 4, wherein, The hoisting assembly is located on the upper plate or the side plate.

6. The underwater battery box of claim 4, wherein, The side plate body includes two side plates; The two side plates are respectively disposed on both sides of the upper plate, and the side plates are respectively connected to the upper plate and the lower plate; The hoisting fitting part is provided on the side plate.

7. The underwater battery box according to claim 4, characterized in that, Including the manifold; The flow divider is disposed in the cavity, and each flow divider is respectively connected to the upper plate and the lower plate. Each of the aforementioned current distribution plates is arranged sequentially at intervals along the lower plate, and the current distribution plate is located between two corresponding battery modules.

8. The underwater battery box of claim 4, wherein, The upper plate and the lower plate are provided with positioning posts on one and positioning holes on the other. In the two underwater battery boxes stacked one on top of the other, the positioning post of one is inserted into the positioning hole of the other.

9. An underwater energy storage system, characterized in that, include: Multiple underwater battery boxes as described in any one of claims 1-8, each of the underwater battery boxes being submerged underwater, and each of the underwater battery boxes being electrically connected.

10. The underwater energy storage system of claim 9, wherein, It includes multiple battery packs, with each underwater battery pack in the same pack stacked on top of the other, and two adjacent underwater battery packs connected and fixed by fasteners.

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