Seabed energy storage control system

Abstract

According to the seabed energy storage control system, a battery module in a cylindrical shell exchanges heat with a first heat exchange plate, a converter exchanges heat with a second heat exchange plate, the first heat exchange plate and the second heat exchange plate are connected in parallel and communicate with a third heat exchange plate for heat exchange, and then a low-temperature liquid medium exchanges and flows back. And the third heat exchange plate sucks external low-temperature seawater through a third liquid pump, and outputs high-temperature seawater through a liquid output pipeline, so that the high-temperature liquid medium input by the first heat exchange plate and the second heat exchange plate is subjected to heat exchange cooling. Therefore, according to the seabed energy storage control system, heat exchange cooling can be conducted on the heating battery module and the converter at the same time, the working efficiency of the seabed energy storage control system is improved, the safety of the seabed energy storage control system is improved, and application and popularization of the seabed energy storage control system are better facilitated.

Description

Technical Field

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

[0002] The submarine energy storage system is a new type of energy storage application scenario. It is used for energy storage systems that integrate renewable energy. It uses offshore renewable energy to power the underwater energy storage system and generate electricity on demand. It can be used as a supplementary power supply to provide energy for the peak demand of the submarine system, allowing the distribution system to adjust according to the average demand rather than the peak demand of the system. At the same time, the submarine energy storage system can serve as a natural backup power function with low noise and other characteristics.

[0003] The submarine energy storage system is a system that installs facilities such as battery systems in a sealed pressure vessel on the seabed, uses submarine composite cables to supply power, and transmits the power back to the sea for on-demand power supply. The submarine energy storage system can accommodate ecological activities such as marine ranches and fishery cages, and can also serve industrial activities such as offshore wind power, offshore oil platforms, underwater vehicles, sensor systems, and amphibious drones. Not only does it not need to occupy land resources, it can also save energy consumption. However, the battery system generates heat during the charging and discharging process, and the submarine energy storage system of the existing technology cannot dissipate heat in a timely manner, which affects the working efficiency of the submarine energy storage system and is not conducive to the safety and promotion of the submarine energy storage system. Summary of the invention

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

[0005] The present invention provides the following technical solutions: A submarine energy storage control system, comprising a cylindrical shell, end covers arranged at two openings on both sides of the cylindrical shell, and a bottom bracket for supporting the cylindrical shell; the inner cavity of the cylindrical shell comprises a battery module, a first circulating fluid path for heat exchange with the battery module, an inverter connected to the battery module, a second circulating fluid path for heat exchange with the inverter, and a third circulating fluid path 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 circulation 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 circulation 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.

[0006] Furthermore, 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.

[0007] Furthermore, 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, and the two third heat exchange plates are connected through a pipeline.

[0008] The above 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 connected to a third heat exchange plate respectively, so that the heat exchange efficiency between the first heat exchange plate and the second heat exchange plate and the third heat exchange plate is higher.

[0009] Furthermore, 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.

[0010] Furthermore, 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.

[0011] Furthermore, it further comprises 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.

[0012] Further, the c port of the second four-way valve connected to the third three-way valve is opened, the a port of the second four-way valve connected to the second heat exchange plate is opened, the b port and the d port of the second four-way valve are closed, 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.

[0013] Further, the c port of the second four-way valve connected to the third three-way valve is opened, the a port of the second four-way valve connected to the second heat exchange plate is opened, the b port and the d port of the second four-way valve are closed, 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.

[0014] Furthermore, a plurality of cylinder wall reinforcement ribs are provided on the outer periphery of the cylinder shell.

[0015] Furthermore, 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.

[0016] The present invention has the following advantages: A submarine energy storage control system, wherein the battery module in the cylindrical shell performs heat exchange with the first heat exchange plate, the converter performs heat exchange with the second heat exchange plate, and the first heat exchange plate and the second heat exchange plate perform heat exchange with the third heat exchange plate in parallel, thereby exchanging and refluxing the low-temperature liquid medium. The third heat exchange plate sucks in the external low-temperature seawater through a third liquid pump, and outputs the high-temperature seawater through an output liquid pipeline, thereby heat exchanging and cooling the high-temperature liquid medium input by the first heat exchange plate and the second heat exchange plate. Therefore, the submarine energy storage control system of the present application can perform heat exchange and cooling on the heated battery module and converter at the same time, thereby improving the working efficiency of the submarine energy storage control system, improving the safety of the submarine energy storage control system, and being more conducive to the promotion and application of the submarine energy storage control system.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a submarine energy storage control system provided by an embodiment of the present invention is shown; Figure 2 Another three-dimensional structural schematic diagram of a submarine energy storage control system provided by an embodiment of the present invention is shown; Figure 3 A connection diagram of a first working mode of a submarine energy storage control system provided by Embodiment 1 of the present invention is shown; Figure 4 A connection diagram of a second working mode of the seabed energy storage control system provided by Embodiment 1 of the present invention is shown; Figure 5 A connection diagram of the third working mode of the submarine energy storage control system provided by Embodiment 2 of the present invention is shown; Figure 6 A connection diagram of the fourth working mode of the submarine energy storage control system provided by Embodiment 2 of the present invention is shown; Figure 7 A connection diagram of the fifth working mode of the seabed energy storage control system provided by Embodiment 2 of the present invention is shown; Figure 8 A connection diagram of the sixth working mode of the seabed energy storage control system provided by Embodiment 2 of the present invention is shown.

[0020] Description of main component symbols: 100-submarine 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; 20-end cover; 30-bottom bracket; 40-battery module; 50-converter; 60-cylinder wall reinforcement rib; 70-filter device; 80-external seawater. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, 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 for illustrative purposes only.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments 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. Example 1

[0026] A subsea energy storage control system 100, see Figures 1 to 3, which comprises a cylindrical shell 10, end covers 20 provided at both sides of the cylindrical shell 10 and a bottom bracket 30 for supporting the cylindrical shell 10; the inner cavity of the cylindrical shell comprises a battery module 40, a first circulating liquid path for heat exchange with the battery module 40, an inverter 50 connected to the battery module 40, a second circulating liquid path for heat exchange with the inverter 50, and a third circulating liquid path for heat exchange with external seawater 80; The first circulating liquid circuit is connected in series with a first liquid pump 16 and a first heat exchange plate 11; the second circulating liquid circuit is connected in series with a second liquid pump 17 and a second heat exchange plate 12; the third circulating liquid circuit is connected in series with a third liquid pump 18 and a third heat exchange plate 13; 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 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 circulating liquid circuit; 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 circulating liquid circuit; 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 the external seawater 80, and one of the input liquid pipelines of the third heat exchange plate 13 is connected to the external seawater 80 through the third liquid pump 18, and the high-temperature liquid medium of the first heat exchange plate 11 and the second heat exchange plate 12 is heat-exchanged with the low-temperature liquid medium in the third heat exchange plate 13 through the liquid output pipeline.

[0027] The above means that both ends of the cylindrical shell 10 are provided with openable end covers 20, and the connection between the end covers 20 and the cylindrical shell 10 can be bolted and sealed. The bottom of the cylindrical shell 10 is provided with a bottom bracket 30 for supporting the stable placement of the submarine 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 during the charging and discharging process, for the safety and durability of the battery module 40 and the inverter 50 during charging and discharging, a first heat exchange plate 11 is provided between the battery modules 40 for heat exchange with the battery module 40, and a second heat exchange plate 12 is provided on the inverter 50 for heat exchange with the inverter 50.

[0028] See also Figure 3The submarine energy storage control system 100 of this embodiment has a first working mode. Specifically, the first heat exchange plate 11 is connected in series with a first liquid pump 16 to form a first circulating liquid circuit, and the second heat exchanger is connected in series with a second liquid pump 17 to form a second circulating liquid circuit. The first circulating liquid circuit and the second circulating liquid circuit 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 the third liquid pump 18 to form a third circulating liquid circuit. 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, and perform 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 the 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 the 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 the first multi-way valve 19.

[0029] One of the input liquid pipelines of the third heat exchange plate 13 is also connected to the external low-temperature seawater through the third liquid pump 18, and the low-temperature seawater is sucked into the third heat exchange plate 13 as a liquid medium. The input liquid pipeline may be provided with a filter device 70; and 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 circuit with the external seawater 80 through the third liquid pump 18. It can be understood that the third heat exchange plate 13 includes multiple output liquid pipelines and multiple input liquid pipelines.

[0030] Therefore, the seabed energy storage control system 100 of the present application can simultaneously perform heat exchange and cooling on the heated battery module 40 and the converter 50, thereby improving the working efficiency of the seabed energy storage control system 100, improving the safety of the seabed energy storage control system 100, and being more conducive to the promotion and application of the seabed energy storage control system 100.

[0031] In this embodiment, a plurality of multi-way valves are further included, and 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 (another liquid inlet of) the third heat exchange plate 13 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. The output liquid pipeline of the second heat exchange plate 12 is connected to (another liquid inlet of) the third heat exchange plate 13 through the second multi-way valve 21, and the output liquid pipeline of the second heat exchange plate 12 is also switched to connect to the third multi-way valve 22 through the second multi-way valve 21, and 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; 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 by switching 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 third multi-way valve 22 by switching the second multi-way valve 21, so as to form a liquid medium circulation loop between the first heat exchange plate 11 and the second heat exchange plate 12; The first circulating liquid circuit further includes a heating device 24 , which is disposed between the liquid outlet of the first heat exchange plate 11 and the first multi-way valve 19 , and is used to heat the liquid medium outputted from the first heat exchange plate 11 .

[0032] 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. 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.

[0033] Therefore, the submarine energy storage control system 100 of this embodiment has a second working mode. Figure 4Even in a low-temperature environment with low seawater temperature, when the working environment temperature of the battery module 40 is too low, in order to ensure the smooth 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. The first heat exchange plate 11 provides heat for heating the battery module 40 at this time, and 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. The third multi-way valve 22 is then switched 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 lower temperature liquid medium of the first heat exchange plate 11 flows back to the second heat exchange plate 12, and the second heat exchange plate 12 then absorbs the heat generated by the converter 50 to heat the liquid medium. Therefore, a cycle is formed in which the second heat exchange plate 12 outputs high-temperature liquid medium to the first heat exchange plate 11 , and then the first heat exchange plate 11 outputs low-temperature liquid medium to the second heat exchange plate 12 .

[0034] In addition, in a lower temperature submarine environment, if the temperature of the high-temperature liquid medium output from the second heat exchange plate 12 to the first heat exchange plate 11 is not high enough, the liquid medium output from the second heat exchange plate 12 can be reheated by the heating device 24 disposed 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 circuit does not work.

[0035] In this embodiment, there are two third heat exchange plates 13, one of the input liquid pipelines of one of the third heat exchange plates 13 is connected to the external seawater 80 through the third liquid pump 18, and one of the output liquid pipelines of the other third heat exchange plate 13 is connected to the external seawater 80, and the two third heat exchange plates 13 are connected through a pipeline. Example 2

[0036] In this example, see Figure 5 , further comprising a fourth heat exchange plate 14 and a refrigeration device, wherein 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; The input liquid pipeline of the fourth heat exchange plate 14 is connected to the third heat exchange plate 13; The output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are connected to the third heat exchange plate 13 through the fourth heat exchange plate 14 respectively; 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 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 connected to the fourth heat exchange plate 14; The compressor 25 outputs refrigerant to cool the fifth heat exchange plate 15, and outputs the heated refrigerant to the fourth heat exchange plate 14 for heat exchange. After the fourth heat exchange plate 14 is cooled, the refrigerant flows back to the compressor 25 for compression and cooling, and the heating device 24 is turned off.

[0037] The above means that there is a third working mode, the output liquid pipeline and the input liquid pipeline of the first heat exchange plate 11 are connected to the fourth heat exchange plate 14 through the fifth heat exchange plate 15 of the refrigeration device, and the input liquid pipeline of the fourth heat exchange plate 14 is connected to the third heat exchange plate 13, and the refrigerant of the refrigeration device is connected to the fifth heat exchange plate 15 through the pipeline to cool the high-temperature liquid medium from the first heat exchange plate 11, and then the heated refrigerant is output to the fourth heat exchange plate 14 through the pipeline for cooling, and finally the refrigerant is returned to the compressor 25 through the pipeline. The input liquid pipeline of the fourth heat exchange plate 14 is connected to the third heat exchange plate 13, so it can heat exchange and cool down with the third heat exchange plate 13, and 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 heat exchange and cool down with the fifth heat exchange plate 15.

[0038] 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 .

[0039] 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 operating 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 where the seawater environment temperature is high on the seabed.

[0040] 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 in the output liquid pipeline and the input liquid pipeline between the first heat exchange plate 11 and the fifth heat exchange plate 15.

[0041] In this example, see Figure 6 , further comprising 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 connect with the fourth four-way valve 23, 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 11 and the second heat exchange plate 12 are connected in parallel to the output liquid pipeline of the fourth heat exchange plate 14 through the fourth four-way valve 23; Open port a, port b, port c and port d of the second four-way valve, and the first heat exchange plate 11 and the second heat exchange plate 12 are connected in parallel to the input liquid pipeline of the third heat exchange plate 13 through the second four-way valve; close the refrigeration device and the heating device 24.

[0042] The above means that there is a fourth working mode, and 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, the first three-way valve is switched to connect with the fourth four-way valve 23, so that the input liquid pipeline of the first heat exchange plate 11 is connected in parallel with 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. The third three-way valve is switched to connect with the second four-way valve, so that the output liquid pipeline of the first heat exchange plate 11 is connected in parallel with 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.

[0043] In the fourth working mode, the refrigeration device and the heating device 24 are turned off, and the third liquid pump 18 is turned on. It is worth further explaining that the first heat exchange plate 11 has a separate output liquid pipeline connected to the c port and the d port of the second four-way valve and then merged into the output liquid pipeline of the second heat exchange plate 12, and the output liquid pipeline of the second heat exchange plate 12 is connected to the a port and the b port of the second four-way valve. The first heat exchange plate 11 has a separate input liquid pipeline connected to the c port and the d port of the fourth four-way valve 23 and then merged into the input liquid pipeline of the second heat exchange plate 12, and the input liquid pipeline of the second heat exchange plate 12 is connected to the a port and the b port of the fourth four-way valve 23. This fourth working mode can be set for the case where the seabed seawater environment temperature is moderate.

[0044] In this example, see Figure 7 , 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 12, close the b port and the d port of the second four-way valve, and the first heat exchange plate 11 is connected in series with the second heat exchange plate 12 through the second four-way valve; Open the c port of the fourth four-way valve 23 connected to the first three-way valve, open the a port of the fourth four-way valve 23 connected to the second heat exchange plate 12, close the b port and the d port of the fourth four-way valve 23, and the first heat exchange plate 11 is connected in series to the second heat exchange plate 12 through the fourth four-way valve 23; turn off the refrigeration device, the heating device 24 and the third liquid pump 18.

[0045] The above means that there is a fifth working mode, that is, in the structure of the fourth 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. The second liquid pump 17 is turned off, and the first liquid pump 16 is turned on. The input liquid pipeline of the second heat exchange plate 12 is connected 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 that an internal circulation is formed 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 seabed seawater environment temperature is low. At this time, the refrigeration device, the heating device 24 and the third liquid pump 18 are not working. The heat generated by the battery module 40 and the converter 50 circulates in the seabed energy storage control system 100 to ensure the normal operation of the seabed energy storage control system 100.

[0046] In this example, see Figure 8 , 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 12, close the b port and the d port of the second four-way valve, and the first heat exchange plate 11 is connected in series with the second heat exchange plate 12 through the second four-way valve; Open the c port of the fourth four-way valve 23 connected to the first three-way valve, open the a port of the fourth four-way valve 23 connected to the second heat exchange plate 12, close the b port and the d port of the fourth four-way valve 23, and the first heat exchange plate 11 is connected in series to the second heat exchange plate 12 through the fourth four-way valve 23; turn off the refrigeration device and the third liquid pump 18, and turn on the heating device 24.

[0047] The above 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. 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 that an internal circulation is formed 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 seawater environment temperature is extremely low on the seabed, and at this time, the refrigeration device and the third liquid pump 18 are not working. The heating device 24 is turned on, and the heat generated by the inverter 50 is input into the first heat exchange plate 11 after being heated by the heating device 24. The battery module 40 is heated by the first heat exchange plate 11 to ensure the normal operation of the submarine energy storage control system 100.

[0048] In this embodiment, a plurality of cylinder wall reinforcement ribs 60 are provided on the outer periphery of the cylinder shell 10 .

[0049] As mentioned above, the cylinder wall reinforcement ribs 60 are used to strengthen the strength of the cylinder shell 10 to prevent the high pressure environment of the seabed from causing damage to the cylinder shell 10 .

[0050] 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.

[0051] As mentioned above, through the control module (not shown in the figure) of the submarine 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 submarine 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 work according to different working modes and submarine environmental conditions, and is also used to control the opening or closing of the first liquid pump 16, the second liquid pump 17 and the third liquid pump 18, and control the operating direction 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 of this embodiment can be adjusted and changed with each other according to the operating direction of each liquid pump, and are not the only direction. The control module can also exchange data with the external terminal and measure the seawater temperature of the seabed in real time through a temperature measuring instrument.

[0052] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0053] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to 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 circulation 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 circulation 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.

2. The subsea energy storage control system according to claim 1, characterized in that: 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.

3. 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.

4. The subsea energy storage control system according to claim 2, 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.

5. The subsea energy storage control system according to claim 4, 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.

6. The subsea energy storage control system according to claim 5, 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.

7. The subsea energy storage control system according to claim 6, 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.

8. The subsea energy storage control system according to claim 6, 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.

9. 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.

10. The subsea energy storage control system according to claim 6, 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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