An undersea energy storage control system

Abstract

The present invention discloses a subsea energy storage control system. The battery module in the cylindrical shell exchanges heat with the first heat exchange plate, and the inverter exchanges heat with the second heat exchange plate. The first heat exchange plate and the second heat exchange plate are connected in parallel to communicate with the third heat exchange plate for heat exchange, and then the low-temperature liquid medium is exchanged and refluxed. The third heat exchange plate sucks in the external low-temperature seawater through the third liquid pump and outputs the high-temperature seawater through an output liquid pipeline, so as to exchange heat and cool down the high-temperature liquid medium input by the first heat exchange plate and the second heat exchange plate. Therefore, the subsea energy storage control system of the present application can simultaneously exchange heat and cool down the battery module and the inverter that generate heat, improving the working efficiency of the subsea energy storage control system, enhancing the safety of the subsea energy storage control system, and being more conducive to the popularization and application of the subsea energy storage control system.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical energy storage, and in particular, to a submarine energy storage control system. Background Art

[0002] The submarine energy storage system is a new application scenario for energy storage, which is used for the energy storage system of renewable energy integration. It uses offshore renewable energy to supply power to the underwater energy storage system and generates electricity as needed. It can provide energy for the peak demand of the submarine system as a supplementary power supply, enabling the distribution system to be adjusted according to the average demand rather than the system peak demand. At the same time, the submarine energy storage system can serve as a natural backup power function and has characteristics such as low noise.

[0003] The submarine energy storage system installs facilities such as battery systems in a sealed pressure vessel on the seabed, powers them with submarine composite cables, and transmits the power back to the sea for power supply as needed. The submarine energy storage system can not only accommodate ecological activities such as marine ranches and fishing cages, but also serve industrial activities such as offshore wind power, offshore oil platforms, underwater vehicles, sensor systems, and amphibious drones. It not only does not occupy onshore resources, but also saves energy consumption. However, the battery system generates heat during the charging and discharging processes, and the existing submarine energy storage systems cannot dissipate heat in a timely manner, thus affecting the working efficiency of the submarine energy storage system and being unfavorable for the safety and popularization of the submarine energy storage system. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a submarine energy storage control system.

[0005] The present invention provides the following technical solutions:

[0006] A submarine energy storage control system, which includes a cylindrical shell, end covers provided at both openings of the cylindrical shell, and a bottom bracket for supporting the cylindrical shell; the inner cavity of the cylindrical shell includes a battery module, a first circulation liquid path for heat exchange with the battery module, an inverter connected to the battery module, a second circulation liquid path for heat exchange with the inverter, and a third circulation liquid path for heat exchange with external seawater;

[0007] A first liquid pump and a first heat exchange plate are connected in series on the first circulation liquid path; a second liquid pump and a second heat exchange plate are connected in series on the second circulation liquid path; a third liquid pump and a third heat exchange plate are connected in series on the third circulation liquid path; the first circulation liquid path and the second circulation liquid path are connected in parallel to the third circulation liquid path;

[0008] The output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the third heat exchange plate, and the first liquid pump is used to provide power for the circulation of the liquid medium in the first circulation liquid path; the output liquid pipeline and the input liquid pipeline of the second heat exchange plate are respectively connected to the third heat exchange plate, and the second liquid pump is used to provide power for the circulation of the liquid medium in the second circulation liquid path; the third heat exchange plate includes a plurality of output liquid pipelines and a plurality of input liquid pipelines, one of the output liquid pipelines of the third heat exchange plate is connected to the external seawater, and one of the input liquid pipelines of the third heat exchange plate is connected to the external seawater through the third liquid pump. The high-temperature liquid media of the first heat exchange plate and the second heat exchange plate both exchange heat with the low-temperature liquid medium in the third heat exchange plate through the liquid output pipeline.

[0009] Further, it further includes a plurality of multi-way valves. The plurality of multi-way valves include a first multi-way valve, a second multi-way valve, and a third multi-way valve. The output liquid pipeline of the first heat exchange plate is connected to the third heat exchange plate through the first multi-way valve, and the output liquid pipeline of the first heat exchange plate is also connected to the liquid input pipeline of the second heat exchange plate through the switching of the first multi-way valve;

[0010] The output liquid pipeline of the second heat exchange plate is connected to the third heat exchange plate through the second multi-way valve, and the output liquid pipeline of the second heat exchange plate is also connected to the third multi-way valve through the switching of the second multi-way valve. The input liquid pipeline of the first heat exchange plate is connected to the second heat exchange plate through the third multi-way valve;

[0011] When the output liquid pipeline of the first heat exchange plate is connected to the input liquid pipeline of the second heat exchange plate through the switching of the first multi-way valve, the output liquid pipeline of the second heat exchange plate is connected to the input liquid pipeline of the first heat exchange plate through the third multi-way valve through the switching of the second multi-way valve to form a liquid medium circulation loop between the first heat exchange plate and the second heat exchange plate;

[0012] The first circulation liquid path further includes a heating device, which is arranged between the liquid outlet of the first heat exchange plate and the first multi-way valve, and the heating device is used to heat the liquid medium output by the first heat exchange plate.

[0013] Further, there are two third heat exchange plates. One of the input liquid pipelines of one of the third heat exchange plates is connected to the external seawater through a third liquid pump, and one of the output liquid pipelines of the other third heat exchange plate is connected to the external seawater. The two third heat exchange plates are connected through a pipeline.

[0014] As described above, it means that two third heat exchange plates are connected through a pipeline. In this embodiment, the first circulation liquid path and the second circulation liquid path can be respectively connected to a third heat exchange plate to make the heat exchange efficiency between the first heat exchange plate and the second heat exchange plate and the third heat exchange plate higher.

[0015] Further, it further includes a fourth heat exchange plate and a refrigeration device. The input liquid pipeline of the second heat exchange plate is connected to the third heat exchange plate through the fourth heat exchange plate;

[0016] The input liquid pipeline of the fourth heat exchange plate is connected to the third heat exchange plate,

[0017] The output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the third heat exchange plate through the fourth heat exchange plate;

[0018] The refrigeration device includes a fifth heat exchange plate and a compressor. The output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the fourth heat exchange plate through the fifth heat exchange plate, and the output liquid pipeline and the input liquid pipeline of the fifth heat exchange plate are respectively connected to the fourth heat exchange plate;

[0019] The compressor outputs refrigerant to cool down the fifth heat exchange plate, and outputs the heated refrigerant to the fourth heat exchange plate for heat exchange. After the refrigerant cools down in the fourth heat exchange plate, it flows back to the compressor for compression refrigeration, and the heating device is turned off.

[0020] Further, the first multi-way valve is a first three-way valve, the third multi-way valve is a third three-way valve, and the first three-way valve and the third three-way valve are respectively arranged on the output liquid pipeline and the input liquid pipeline between the first heat exchange plate and the fifth heat exchange plate.

[0021] Further, it further includes a fourth four-way valve. The second multi-way valve is a second four-way valve. The first three-way valve switches to connect to the fourth four-way valve, and the third three-way valve switches to connect to the second four-way valve;

[0022] When the a port, b port, c port and d port of the second four-way valve are opened, the first heat exchange plate and the second heat exchange plate are both connected in parallel to the output liquid pipeline of the fourth heat exchange plate through the fourth four-way valve;

[0023] When the a port, b port, c port and d port of the second four-way valve are opened, the first heat exchange plate and the second heat exchange plate are both connected in parallel to the input liquid pipeline of the third heat exchange plate through the second four-way valve; the refrigeration device and the heating device are turned off.

[0024] Further, open the c port of the second four-way valve that communicates with the third three-way valve, open the a port of the second four-way valve that communicates with the second heat exchange plate, close the b port and d port of the second four-way valve, and connect the first heat exchange plate in series through the second four-way valve and the second heat exchange plate;

[0025] Open the c port of the fourth four-way valve that communicates with the first three-way valve, open the a port of the fourth four-way valve that communicates with the second heat exchange plate, close the b port and d port of the fourth four-way valve, and connect the first heat exchange plate in series through the fourth four-way valve and the second heat exchange plate; Turn off the refrigeration device, the heating device and the third liquid pump.

[0026] Further, open the c port of the second four-way valve that communicates with the third three-way valve, open the a port of the second four-way valve that communicates with the second heat exchange plate, close the b port and d port of the second four-way valve, and connect the first heat exchange plate in series through the second four-way valve and the second heat exchange plate;

[0027] Open the c port of the fourth four-way valve that communicates with the first three-way valve, open the a port of the fourth four-way valve that communicates with the second heat exchange plate, close the b port and d port of the fourth four-way valve, and connect the first heat exchange plate in series through the fourth four-way valve and the second heat exchange plate; Turn off the refrigeration device and the third liquid pump, and turn on the heating device.

[0028] Further, a plurality of barrel wall reinforcing ribs are provided on the outer periphery of the cylindrical shell.

[0029] Further, the first three-way valve, the second four-way valve, the third three-way valve and the fourth four-way valve are all solenoid valves.

[0030] The present invention has the following advantages:

[0031] A subsea energy storage control system, in which the battery module in the cylindrical shell exchanges heat with the first heat exchange plate, the converter exchanges heat with the second heat exchange plate, the first heat exchange plate and the second heat exchange plate are connected in parallel to exchange heat with the third heat exchange plate, and then the low-temperature liquid medium is exchanged and refluxed. The third heat exchange plate sucks in the external low-temperature seawater through the third liquid pump and outputs the high-temperature seawater through an output liquid pipeline, so as to exchange heat and cool down the high-temperature liquid medium input by the first heat exchange plate and the second heat exchange plate. Therefore, the subsea energy storage control system of the present application can simultaneously exchange heat and cool down the heating battery module and converter, improving the working efficiency of the subsea energy storage control system, enhancing the safety of the subsea energy storage control system, and being more conducive to the popularization and application of the subsea energy storage control system.

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and detailed descriptions are as follows. Brief Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

[0034] Figure 1 Shows a three-dimensional structural schematic diagram of the subsea energy storage control system provided by the embodiment of the present invention;

[0035] Figure 2 Shows another three-dimensional structural schematic diagram of the subsea energy storage control system provided by the embodiment of the present invention;

[0036] Figure 3 Shows a connection schematic diagram of the first working mode of the subsea energy storage control system provided by Embodiment 1 of the present invention;

[0037] Figure 4 Shows a connection schematic diagram of the second working mode of the subsea energy storage control system provided by Embodiment 1 of the present invention;

[0038] Figure 5 Shows a connection schematic diagram of the third working mode of the subsea energy storage control system provided by Embodiment 2 of the present invention;

[0039] Figure 6 Shows a connection schematic diagram of the fourth working mode of the subsea energy storage control system provided by Embodiment 2 of the present invention;

[0040] Figure 7 Shows a connection schematic diagram of the fifth working mode of the subsea energy storage control system provided by Embodiment 2 of the present invention;

[0041] Figure 8 Shows a connection schematic diagram of the sixth working mode of the subsea energy storage control system provided by Embodiment 2 of the present invention.

[0042] Main Element Symbol Description:

[0043] 100 - Subsea energy storage control system; 10 - Cylindrical shell; 11 - First heat exchange plate; 12 - Second heat exchange plate; 13 - Third heat exchange plate; 14 - Fourth heat exchange plate; 15 - Fifth heat exchange plate; 16 - First liquid pump; 17 - Second liquid pump; 18 - Third liquid pump; 19 - First multi - way valve; 21 - Second multi - way valve; 22 - Third multi - way valve; 23 - Fourth four - way valve; 24 - Heating device; 25 - Compressor;

[0044] 20 - End cover; 30 - Bottom bracket; 40 - Battery module; 50 - Inverter; 60 - Cylinder wall stiffener; 70 - Filter device; 80 - External seawater. Detailed implementation manner

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where 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 by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0047] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise clearly and specifically defined.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of the template herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Embodiment 1

[0050] A subsea energy storage control system 100, please refer to Figures 1 to 3 which includes a cylindrical shell 10, end caps 20 provided at both openings of the cylindrical shell 10, and a bottom bracket 30 for supporting the cylindrical shell 10; the inner cavity of the cylindrical shell includes a battery module 40, a first circulation liquid path for heat exchange with the battery module 40, an inverter 50 connected to the battery module 40, a second circulation liquid path for heat exchange with the inverter 50, and a third circulation liquid path for heat exchange with external seawater 80;

[0051] A first liquid pump 16 and a first heat exchange plate 11 are connected in series on the first circulation liquid path; a second liquid pump 17 and a second heat exchange plate 12 are connected in series on the second circulation liquid path; a third liquid pump 18 and a third heat exchange plate 13 are connected in series on the third circulation liquid path; the first circulation liquid path and the second circulation liquid path are connected in parallel to the third circulation liquid path;

[0052] The output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are respectively connected to the third heat exchange plate 13, and the first liquid pump 16 is used to provide power for the circulation of the liquid medium in the first circulation liquid path; the output liquid pipeline and the input liquid pipeline of the second heat exchange plate 12 are respectively connected to the third heat exchange plate 13, and the second liquid pump 17 is used to provide power for the circulation of the liquid medium in the second circulation liquid path; the third heat exchange plate 13 includes a plurality of output liquid pipelines and a plurality of input liquid pipelines, one of the output liquid pipelines of the third heat exchange plate 13 is connected to external seawater 80, one of the input liquid pipelines of the third heat exchange plate 13 is connected to external seawater 80 through the third liquid pump 18, and the high-temperature liquid media of the first heat exchange plate 11 and the second heat exchange plate 12 both exchange heat with the low-temperature liquid medium in the third heat exchange plate 13 through the liquid output pipeline.

[0053] As described above, it means that both ends of the cylindrical shell 10 are provided with openable end covers 20, and the connection mode between the end cover 20 and the cylindrical shell 10 can be a bolt-fixed and sealed connection. The bottom of the cylindrical shell 10 is provided with a bottom bracket 30 for supporting the stable placement of the subsea energy storage control system 100 on the seabed. The inner cavity of the cylindrical shell 10 is provided with a battery module 40 and an inverter 50. Since the battery module 40 and the inverter 50 are prone to heat generation during the charging and discharging process, for the safety and durability of the charging and discharging of the battery module 40 and the inverter 50, a first heat exchange plate 11 is arranged between the battery modules 40 for heat exchange with the battery module 40, and a second heat exchange plate 12 is arranged on the inverter 50 for heat exchange with the inverter 50.

[0054] Please refer to Figure 3 , the subsea energy storage control system 100 of this embodiment has a first working mode. Specifically, a first liquid pump 16 is connected in series with the first heat exchange plate 11 to form a first circulating liquid path, and a second liquid pump 17 is connected in series with the second heat exchanger to form a second circulating liquid path. The first circulating liquid path and the second circulating liquid path are connected in parallel to the third heat exchange plate 13 for heat exchange. The third heat exchange plate 13 is connected to the external seawater through a third liquid pump 18 to form a third circulating liquid path. It is worth further explaining that the first heat exchange plate 11 and the second heat exchange plate 12 transport the high-temperature liquid medium to the third heat exchange plate 13 for heat exchange with the low-temperature liquid medium in the third heat exchange plate 13, and then the third heat exchange plate 13 transports the low-temperature liquid medium back to the first heat exchange plate 11 and the second heat exchange plate 12 respectively. In a specific embodiment, the output liquid pipeline of the second heat exchange plate 12 can be connected to the third heat exchange plate 13 through a second multi-way valve 21; the input liquid pipeline of the first heat exchange plate 11 can be connected to the third heat exchange plate 13 through a third multi-way valve 22, and the output liquid pipeline of the first heat exchange plate 11 can be connected to the third heat exchange plate 13 through a first multi-way valve 19.

[0055] One of the input liquid pipelines of the third heat exchange plate 13 is also connected to the external low-temperature seawater through a third liquid pump 18 to suck the low-temperature seawater into the third heat exchange plate 13, and a filtering device 70 can be provided on this input liquid pipeline; and then the high-temperature seawater is output to the external seawater 80 through an output liquid pipeline. Therefore, the third heat exchange plate 13 forms a third liquid path with the external seawater 80 through the third liquid pump 18. It can be understood that the third heat exchange plate 13 includes a plurality of output liquid pipelines and a plurality of input liquid pipelines.

[0056] Therefore, the subsea energy storage control system 100 of this application can simultaneously perform heat exchange and cooling on the heat-generating battery module 40 and inverter 50, improving the working efficiency of the subsea energy storage control system 100, enhancing the safety of the subsea energy storage control system 100, and being more conducive to the popularization and application of the subsea energy storage control system 100.

[0057] In this embodiment, it further includes a plurality of multi-way valves. The plurality of multi-way valves include a first multi-way valve 19, a second multi-way valve 21, and a third multi-way valve 22. The output liquid pipeline of the first heat exchange plate 11 is connected to the third heat exchange plate 13 (the other liquid inlet) through the first multi-way valve 19, and the output liquid pipeline of the first heat exchange plate 11 is also connected to the liquid input pipeline of the second heat exchange plate 12 through the switching of the first multi-way valve 19;

[0058] The output liquid pipeline of the second heat exchange plate 12 is connected to the third heat exchange plate 13 (the other liquid inlet) through the second multi-way valve 21, and the output liquid pipeline of the second heat exchange plate 12 is also connected to the third multi-way valve 22 through the switching of the second multi-way valve 21. The input liquid pipeline of the first heat exchange plate 11 is connected to the second heat exchange plate 12 through the third multi-way valve 22;

[0059] When the output liquid pipeline of the first heat exchange plate 11 is connected to the input liquid pipeline of the second heat exchange plate 12 through the switching of the first multi-way valve 19, the output liquid pipeline of the second heat exchange plate 12 is connected to the input liquid pipeline of the first heat exchange plate 11 through the switching of the second multi-way valve 21 via the third multi-way valve 22 to form a liquid medium circulation loop between the first heat exchange plate 11 and the second heat exchange plate 12;

[0060] The first circulation liquid path further includes a heating device 24. The heating device 24 is arranged between the liquid outlet of the first heat exchange plate 11 and the first multi-way valve 19, and the heating device 24 is used to heat the liquid medium output by the first heat exchange plate 11.

[0061] The above means that the output liquid pipeline of the first heat exchange plate 11 can be connected to the third heat exchange plate 13 or the second heat exchange plate 12 through the switching of the first multi-way valve 19, that is, the output liquid pipeline of the first heat exchange plate 11 can be connected to the input liquid pipeline of the second heat exchange plate 12 or the input liquid pipeline of the third heat exchange plate 13 through the first multi-way valve 19. And the output liquid pipeline of the second heat exchange plate 12 is connected to the third heat exchange plate 13 or the third multi-way valve 22 through the switching of the second multi-way valve 21, and the input liquid pipeline of the first heat exchange plate 11 is connected to the third heat exchange plate 13 or the second multi-way valve 21 through the switching of the third multi-way valve 22.

[0062] Therefore, there is a second working mode for the subsea energy storage control system 100 in this embodiment. Refer to Figure 4, even in a low-temperature environment with low seawater temperature, when the operating environment temperature of the battery module 40 is too low, in order to ensure the stable operation of the battery module 40, the first multi-way valve 19 can be switched so that the output liquid pipeline of the first heat exchange plate 11 is connected to the input liquid pipeline of the second heat exchange plate 12. At this time, the first heat exchange plate 11 provides heat for heating the battery module 40. The output liquid pipeline of the second heat exchange plate 12 is connected to the third multi-way valve 22 through the switching of the second multi-way valve 21, and the third multi-way valve 22 switches to connect the second multi-way valve 21 to the first heat exchange plate 11. That is, the input liquid pipeline of the first heat exchange plate 11 is connected to the second multi-way valve 21 through the switching of the third multi-way valve 22. Therefore, the liquid medium with a lower temperature on the first heat exchange plate 11 flows back to the second heat exchange plate 12, and the second heat exchange plate 12 absorbs the heat generated by the converter 50 to heat up the liquid medium. Thus, a cycle is formed in which the second heat exchange plate 12 outputs a high-temperature liquid medium to the first heat exchange plate 11, and then the first heat exchange plate 11 outputs a low-temperature liquid medium to the second heat exchange plate 12.

[0063] In addition, in a deeper seabed environment with lower temperature, if the high-temperature liquid medium output from the second heat exchange plate 12 to the first heat exchange plate 11 is not hot enough, the liquid medium output from the second heat exchange plate 12 can be reheated by the heating device 24 provided between the first heat exchange plate 11 and the first multi-way valve 19. It can be understood that in the second working mode, the third liquid pump 18 does not work, that is, the third circulating liquid path does not work.

[0064] In this embodiment, there are two third heat exchange plates 13. One input liquid pipeline of one of the third heat exchange plates 13 is connected to the external seawater 80 through the third liquid pump 18, and one output liquid pipeline of the other third heat exchange plate 13 is connected to the external seawater 80. The two third heat exchange plates 13 are connected through a pipeline. Embodiment 2

[0065] In this embodiment, please refer to Figure 5 , and it further includes a fourth heat exchange plate 14 and a refrigeration device. The input liquid pipeline of the second heat exchange plate 12 is connected to the third heat exchange plate 13 through the fourth heat exchange plate 14;

[0066] The input liquid pipeline of the fourth heat exchange plate 14 is connected to the third heat exchange plate 13;

[0067] The output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are respectively connected to the third heat exchange plate 13 through the fourth heat exchange plate 14;

[0068] The refrigeration device includes a fifth heat exchange plate 15 and a compressor 25. The output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are respectively connected to the fourth heat exchange plate 14 through the fifth heat exchange plate 15, and the output liquid pipeline and the input liquid pipeline of the fifth heat exchange plate 15 are respectively connected to the fourth heat exchange plate 14;

[0069] The compressor 25 outputs refrigerant to cool down the fifth heat exchange plate 15, and outputs the heated refrigerant to the fourth heat exchange plate 14 for heat exchange. After the refrigerant is cooled down in the fourth heat exchange plate 14, it flows back to the compressor 25 for compression refrigeration, and the heating device 24 is turned off.

[0070] As described above, it refers to the existence of a third working mode. The output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are both connected to the fourth heat exchange plate 14 through the fifth heat exchange plate 15 of the refrigeration device. The input liquid pipeline of the fourth heat exchange plate 14 is further connected to the third heat exchange plate 13. The refrigerant of the refrigeration device is connected to the fifth heat exchange plate 15 through a pipeline to cool down the high-temperature liquid medium from the first heat exchange plate 11. Subsequently, the heated refrigerant is output to the fourth heat exchange plate 14 through a pipeline for cooling, and finally the refrigerant flows back to the compressor 25 through a pipeline. The input liquid pipeline of the fourth heat exchange plate 14 is connected to the third heat exchange plate 13, so heat exchange and cooling can be carried out with the third heat exchange plate 13. The input liquid pipeline and the output liquid pipeline of the first heat exchange plate 11 are connected to the fifth heat exchange plate 15, so the first heat exchange plate 11 can also be cooled down by heat exchange with the fifth heat exchange plate 15.

[0071] The input liquid pipeline of the second heat exchange plate 12 is connected to the third heat exchange plate 13 through the fourth heat exchange plate 14, and the output liquid pipeline of the second heat exchange plate 12 is connected to the third heat exchange plate 13.

[0072] It is worth further explaining that in the third working mode, the output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are swapped relative to the second working mode (changing the operation direction of the first liquid pump 16). Specifically, the output liquid pipeline of the first heat exchange plate 11 is connected to the input liquid pipeline of the fifth heat exchange plate 15 through the switching of the third multi-way valve 22, the input liquid pipeline of the first heat exchange plate 11 is connected to the fifth heat exchange plate 15 through the switching of the first multi-way valve 19, and the output liquid pipeline of the second heat exchange plate 12 is connected to the input liquid pipeline of the third heat exchange plate 13 through the switching of the second multi-way valve 21. The heating device 24 does not work at this time, and the third liquid pump 18 is turned on. This third working mode can be set for the case of high seawater environmental temperature on the seabed.

[0073] In this embodiment, the first multi-way valve 19 is a first three-way valve, the third multi-way valve 22 is a third three-way valve, and the first three-way valve and the third three-way valve are respectively arranged on the output liquid pipeline and the input liquid pipeline between the first heat exchange plate 11 and the fifth heat exchange plate 15.

[0074] In this embodiment, please refer to Figure 6 , and further includes a fourth four-way valve 23. The second multi-way valve 21 is a second four-way valve. The first three-way valve is switched to communicate with the fourth four-way valve 23, and the third three-way valve is switched to communicate with the second four-way valve;

[0075] Open the a port, b port, c port, and d port of the second four-way valve. The first heat exchange plate 11 and the second heat exchange plate 12 are both connected in parallel to the output liquid pipeline of the fourth heat exchange plate 14 through the fourth four-way valve 23;

[0076] Open the a port, b port, c port, and d port of the second four-way valve. The first heat exchange plate 11 and the second heat exchange plate 12 are both connected in parallel to the input liquid pipeline of the third heat exchange plate 13 through the second four-way valve. Turn off the refrigeration device and the heating device 24.

[0077] As mentioned above, it refers to the existence of a fourth working mode. The fourth four-way valve 23 is arranged between the input liquid pipeline of the second heat exchange plate 12 and the fourth heat exchange plate 14. In the structure of the third working mode, switch the first three-way valve to communicate with the fourth four-way valve 23, so that the input liquid pipeline of the first heat exchange plate 11 is connected in parallel to the input liquid pipeline of the second heat exchange plate 12, that is, the input liquid pipeline of the first heat exchange plate 11 and the input liquid pipeline of the second heat exchange plate 12 are connected to the output liquid pipeline of the fourth heat exchange plate 14. Switch the third three-way valve to communicate with the second four-way valve, so that the output liquid pipeline of the first heat exchange plate 11 is connected in parallel to the output liquid pipeline of the second heat exchange plate 12, that is, the output liquid pipeline of the first heat exchange plate 11 and the output liquid pipeline of the second heat exchange plate 12 are connected to the input liquid pipeline of the third heat exchange plate 13.

[0078] In the fourth working mode, turn off the refrigeration device and the heating device 24, and the third liquid pump 18 starts to work. It is worth further explaining that the first heat exchange plate 11 has a separate output liquid pipeline that connects to the c port and d port of the second four-way valve and then merges into the output liquid pipeline of the second heat exchange plate 12. The output liquid pipeline of the second heat exchange plate 12 connects to the a port and b port of the second four-way valve. The first heat exchange plate 11 has a separate input liquid pipeline that connects to the c port and d port of the fourth four-way valve 23 and then merges into the input liquid pipeline of the second heat exchange plate 12. The input liquid pipeline of the second heat exchange plate 12 connects to the a port and b port of the fourth four-way valve 23. This fourth working mode can be set for the case where the temperature of the seabed seawater environment is moderate.

[0079] In this embodiment, please refer to Figure 7 , open the c port where the second four-way valve is connected to the third three-way valve, open the a port where the second four-way valve is connected to the second heat exchange plate 12, close the b port and d port of the second four-way valve, and the first heat exchange plate 11 is connected in series through the second four-way valve and the second heat exchange plate 12;

[0080] Open the c port where the fourth four-way valve 23 is connected to the first three-way valve, open the a port where the fourth four-way valve 23 is connected to the second heat exchange plate 12, close the b port and d port of the fourth four-way valve 23, and the first heat exchange plate 11 is connected in series through the fourth four-way valve 23 to the second heat exchange plate 12; turn off the refrigeration device, the heating device 24 and the third liquid pump 18.

[0081] As described above, it means that there is a fifth working mode, that is, in the structure of the fourth working mode, the b port and d port of the second four-way valve are closed, and the b port and d port of the fourth four-way valve 23 are closed. At this time, the first heat exchange plate 11 and the second heat exchange plate 12 are connected in series through the second four-way valve, the second three-way valve, the first three-way valve, and the fourth four-way valve 23 in sequence. Turn off the second liquid pump 17 and turn on the first liquid pump 16 to connect the input liquid pipeline of the second heat exchange plate 12 to the output liquid pipeline of the first heat exchange plate 11, and the output liquid pipeline of the second heat exchange plate 12 to the input liquid pipeline of the first heat exchange plate 11, so as to form an internal circulation between the first heat exchange plate 11 and the second heat exchange plate 12. In the fifth working mode, it can be applied to the situation where the temperature of the seabed seawater environment is relatively low. At this time, the refrigeration device, the heating device 24 and the third liquid pump 18 do not work. The heat generated by the battery module 40 and the inverter 50 circulates internally in the seabed energy storage control system 100 to ensure the normal operation of the seabed energy storage control system 100.

[0082] In this embodiment, please refer to Figure 8 , open the c port where the second four-way valve is connected to the third three-way valve, open the a port where the second four-way valve is connected to the second heat exchange plate 12, close the b port and d port of the second four-way valve, and the first heat exchange plate 11 is connected in series through the second four-way valve and the second heat exchange plate 12;

[0083] Open the c port where the fourth four-way valve 23 is connected to the first three-way valve, open the a port where the fourth four-way valve 23 is connected to the second heat exchange plate 12, close the b port and d port of the fourth four-way valve 23, and the first heat exchange plate 11 is connected in series through the fourth four-way valve 23 to the second heat exchange plate 12; turn off the refrigeration device and the third liquid pump 18, and turn on the heating device 24.

[0084] As described above, it means that there is a sixth working mode, that is, in the structure of the fifth working mode, the b port and the d port of the second four-way valve are closed, and the b port and the d port of the fourth four-way valve 23 are closed. At this time, the first heat exchange plate 11 and the second heat exchange plate 12 are connected in series through the second four-way valve, the second three-way valve, the first three-way valve, and the fourth four-way valve 23 in sequence. The second liquid pump 17 is turned on, and the first liquid pump 16 is turned off to connect the input liquid pipeline of the second heat exchange plate 12 to the output liquid pipeline of the first heat exchange plate 11, and the output liquid pipeline of the second heat exchange plate 12 is connected to the input liquid pipeline of the first heat exchange plate 11, so as to form an internal circulation between the first heat exchange plate 11 and the second heat exchange plate 12. In the sixth working mode, it can be applied to the situation where the temperature of the seabed seawater environment is extremely low. At this time, the refrigeration device and the third liquid pump 18 do not work. The heating device 24 is turned on to work. After the heat generated by the converter 50 is jointly heated by the heating device 24, it is input into the first heat exchange plate 11, and the battery module 40 is heated through the first heat exchange plate 11 to ensure the normal operation of the seabed energy storage control system 100.

[0085] In this embodiment, a plurality of barrel wall reinforcing ribs 60 are provided on the outer periphery of the cylindrical shell 10.

[0086] As described above, the barrel wall reinforcing ribs 60 are used to strengthen the strength of the cylindrical shell 10 and prevent the high-pressure environment on the seabed from damaging the cylindrical shell 10.

[0087] In this embodiment, the first three-way valve, the second four-way valve, the third three-way valve, and the fourth four-way valve 23 are all solenoid valves.

[0088] As described above, through the control module (not shown in the figure) of the seabed energy storage control system 100, the passage conditions of the first three-way valve, the second four-way valve, the third three-way valve, and the fourth four-way valve 23 are electrically connected and controlled to cope with different seabed temperature environment conditions. The control module is also connected to the refrigeration device, the heating device 24, the first liquid pump 16, the second liquid pump 17, and the third liquid pump 18. The control module is used to control the refrigeration device and the heating device 24 to perform opening or closing operations according to different working modes and seabed environment conditions, and is also used to control the opening or closing operations of the first liquid pump 16, the second liquid pump 17, and the third liquid pump 18, and control the operation directions of the first liquid pump 16, the second liquid pump 17, and the third liquid pump 18 according to different working modes. It can be understood that the input liquid pipeline and the output liquid pipeline in this embodiment can be adjusted and changed with each other according to the operation directions of each liquid pump, and are not in a unique direction. The control module can also perform data interaction with an external terminal and measure the seawater temperature on the seabed in real time through a temperature measuring instrument.

[0089] In all examples shown and described herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0090] The embodiments described above merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A subsea energy storage control system, characterized in that: It comprises a cylindrical shell, end covers arranged at both sides of the cylindrical shell opening and a bottom bracket for supporting the cylindrical shell; the inner cavity of the cylindrical shell comprises a battery module, a first circulating liquid circuit for heat exchange with the battery module, an inverter connected to the battery module, a second circulating liquid circuit for heat exchange with the inverter, and a third circulating liquid circuit for heat exchange with external seawater; The first circulating liquid circuit is connected in series with a first liquid pump and a first heat exchange plate; the second circulating liquid circuit is connected in series with a second liquid pump and a second heat exchange plate; the third circulating liquid circuit is connected in series with a third liquid pump and a third heat exchange plate; the first circulating liquid circuit and the second circulating liquid circuit are connected in parallel to the third circulating liquid circuit; The output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the third heat exchange plate, and the first liquid pump is used to provide power for the circulation of the liquid medium in the first circulating liquid circuit; the output liquid pipeline and the input liquid pipeline of the second heat exchange plate are respectively connected to the third heat exchange plate, and the second liquid pump is used to provide power for the circulation of the liquid medium in the second circulating liquid circuit; the third heat exchange plate includes a plurality of output liquid pipelines and a plurality of input liquid pipelines, one of the output liquid pipelines of the third heat exchange plate is connected to external seawater, and one of the input liquid pipelines of the third heat exchange plate is connected to external seawater through the third liquid pump, and the high-temperature liquid medium of the first heat exchange plate and the second heat exchange plate are heat exchanged with the low-temperature liquid medium in the third heat exchange plate through the liquid output pipeline; It also includes a plurality of multi-way valves, the plurality of multi-way valves include a first multi-way valve, a second multi-way valve and a third multi-way valve, the output liquid pipeline of the first heat exchange plate is connected to the third heat exchange plate through the first multi-way valve, and the output liquid pipeline of the first heat exchange plate is also connected to the liquid input pipeline of the second heat exchange plate through the switching of the first multi-way valve; The output liquid pipeline of the second heat exchange plate is connected to the third heat exchange plate through the second multi-way valve, and the output liquid pipeline of the second heat exchange plate is also switched to the third multi-way valve through the second multi-way valve, and the input liquid pipeline of the first heat exchange plate is connected to the second heat exchange plate through the third multi-way valve; When the output liquid pipeline of the first heat exchange plate is connected to the input liquid pipeline of the second heat exchange plate by switching the first multi-way valve, the output liquid pipeline of the second heat exchange plate is connected to the input liquid pipeline of the first heat exchange plate through the third multi-way valve by switching the second multi-way valve, so as to form a liquid medium circulation loop between the first heat exchange plate and the second heat exchange plate; The first circulating liquid circuit also includes a heating device, which is disposed between the liquid outlet of the first heat exchange plate and the first multi-way valve, and is used to heat the liquid medium output by the first heat exchange plate.

2. The subsea energy storage control system according to claim 1, characterized in that: There are two third heat exchange plates, one of the input liquid pipelines of one of the third heat exchange plates is connected to the external seawater through a third liquid pump, and one of the output liquid pipelines of the other third heat exchange plate is connected to the external seawater. The two third heat exchange plates are connected through a pipeline.

3. The subsea energy storage control system according to claim 1, characterized in that: It also includes a fourth heat exchange plate and a refrigeration device, wherein the input liquid pipeline of the second heat exchange plate is connected to the third heat exchange plate through the fourth heat exchange plate; The input liquid pipeline of the fourth heat exchange plate is connected to the third heat exchange plate; The output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the third heat exchange plate through the fourth heat exchange plate; The refrigeration device comprises a fifth heat exchange plate and a compressor, the output liquid pipeline and the input liquid pipeline of the first heat exchange plate are respectively connected to the fourth heat exchange plate through the fifth heat exchange plate, and the output liquid pipeline and the input liquid pipeline of the fifth heat exchange plate are respectively connected to the fourth heat exchange plate; The compressor outputs refrigerant to cool the fifth heat exchange plate, and outputs the heated refrigerant to the fourth heat exchange plate for heat exchange. After the fourth heat exchange plate is cooled, the refrigerant flows back to the compressor for compression and cooling, and the heating device is turned off.

4. The subsea energy storage control system according to claim 3, characterized in that: The first multi-way valve is a first three-way valve, the third multi-way valve is a third three-way valve, and the first three-way valve and the third three-way valve are respectively arranged in the output liquid pipeline and the input liquid pipeline between the first heat exchange plate and the fifth heat exchange plate.

5. The subsea energy storage control system according to claim 4, characterized in that: It also includes a fourth four-way valve, the second multi-way valve is a second four-way valve, the first three-way valve is switched to connect with the fourth four-way valve, and the third three-way valve is switched to connect with the second four-way valve; Open the a port, b port, c port and d port of the second four-way valve, so that the first heat exchange plate and the second heat exchange plate are connected in parallel to the output liquid pipeline of the fourth heat exchange plate through the fourth four-way valve; Open port a, port b, port c and port d of the second four-way valve, and the first heat exchange plate and the second heat exchange plate are connected in parallel to the input liquid pipeline of the third heat exchange plate through the second four-way valve; close the refrigeration device and the heating device.

6. The subsea energy storage control system according to claim 5, characterized in that: Open the c port of the second four-way valve connected to the third three-way valve, open the a port of the second four-way valve connected to the second heat exchange plate, close the b port and the d port of the second four-way valve, and the first heat exchange plate is connected in series with the second heat exchange plate through the second four-way valve; Open port c of the fourth four-way valve connected to the first three-way valve, open port a of the fourth four-way valve connected to the second heat exchange plate, close port b and port d of the fourth four-way valve, and the first heat exchange plate is connected in series to the second heat exchange plate through the fourth four-way valve; turn off the refrigeration device, the heating device and the third liquid pump.

7. The subsea energy storage control system according to claim 5, characterized in that: Open the c port of the second four-way valve connected to the third three-way valve, open the a port of the second four-way valve connected to the second heat exchange plate, close the b port and the d port of the second four-way valve, and the first heat exchange plate is connected in series with the second heat exchange plate through the second four-way valve; Open port c of the fourth four-way valve connected to the first three-way valve, open port a of the fourth four-way valve connected to the second heat exchange plate, close port b and port d of the fourth four-way valve, and the first heat exchange plate is connected in series to the second heat exchange plate through the fourth four-way valve; turn off the refrigeration device and the third liquid pump, and turn on the heating device.

8. The subsea energy storage control system according to claim 1, characterized in that: A plurality of cylinder wall reinforcement ribs are arranged on the outer periphery of the cylinder shell.

9. The subsea energy storage control system according to claim 5, characterized in that: The first three-way valve, the second four-way valve, the third three-way valve and the fourth four-way valve are all solenoid valves.

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