Marine environment energy storage battery liquid flow heat management desalination anti-scaling system and method

Abstract

The invention belongs to the technical field of energy storage batteries, and particularly relates to a marine environment energy storage battery liquid flow heat management desalination anti-scaling system and method.The system comprises a plurality of energy storage prefabricated cabins, a liquid flow cold plate, an inverter cabin, a first heat exchanger module, a first submersible pump module and a battery liquid flow pipe network loop; seawater circulates in a loop composed of a liquid flow cold plate, a first heat exchanger module and a first submersible pump module. And the desalination module comprises a plurality of distillation towers, and seawater distilled and desalted by the plurality of distillation towers is filled into the battery liquid flow pipe network loop through a purified water pipe network. According to the system, seawater energy is adopted, heat exchange is conducted on the energy storage battery module, seawater desalination is achieved at the same time, scaling of the heat management system is prevented, and the safety performance and maintenance cost of the heat management system of the marine environment energy storage battery are prevented from being affected.

Description

Technical Field

[0001] This application belongs to the field of energy storage battery technology, and specifically relates to a desalination and scale prevention system and method for liquid flow thermal management of marine environment energy storage batteries. Background Technology

[0002] Lithium-ion battery energy storage systems are widely used in offshore wind and solar power to address the intermittency and instability of wind and solar power generation. The marine, island, and coastal estuary environments are characterized by high humidity and high salinity. Due to the high humidity and salinity of sea breezes, condensation easily forms on the batteries, leading to water film formation on components, corrosion of joints, short circuits, and increased equipment failure rates. Increased salinity also accelerates the electrochemical corrosion of metal materials, posing challenges to the safe and stable operation of energy storage batteries.

[0003] Liquid-cooled thermal management systems dissipate heat through contact between cold plates and the battery. Compared to air-cooled systems, liquid circulation avoids direct contact with high-humidity, high-salt external air, reducing the risk of corrosion. Furthermore, from an economic perspective, using seawater on-site as the heat exchange medium can further reduce initial investment and maintenance costs, ensuring long-term operational reliability. However, seawater is primarily composed of salt solutions such as NaCl, which readily causes corrosion and biofouling of heat exchange pipes and components. This severely impacts the safety performance and maintenance costs of the battery's thermal management system.

[0004] Therefore, there is an urgent need for a desalination and scale prevention system and method for thermal management of liquid flow in marine energy storage batteries.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] To overcome the aforementioned problems in the prior art, this application provides a desalination and anti-scaling system and method for thermal management of marine environmental energy storage batteries. This system utilizes seawater energy to exchange heat for the energy storage battery modules in marine wind and solar power generation energy storage battery systems, while simultaneously achieving seawater desalination to prevent scaling of the thermal management system, thus avoiding impacts on the safety performance and maintenance costs of the thermal management system of marine environmental energy storage batteries.

[0007] In some embodiments of this application, a desalination and scale prevention system for marine environmental energy storage battery liquid flow thermal management is provided, comprising: Multiple energy storage prefabricated modules are placed on an offshore platform, and each energy storage prefabricated module contains multiple energy storage battery modules; The liquid flow cooling plate is used for heat exchange with the energy storage battery module. Each energy storage battery module has a corresponding liquid flow cooling plate installed below it. The inverter compartment is where DC-AC conversion is performed, converting the electrical energy output from the energy storage battery module into AC power for external supply. Heat exchanger module one, located in seawater, is used for heat exchange with seawater; Submersible pump module one, which is located in seawater, is used to pump seawater into heat exchanger module one; The battery fluid flow network loop allows seawater to circulate in a loop consisting of a fluid flow cooling plate, heat exchanger module one, and submersible pump module one. The desalination module includes multiple distillation towers, through which seawater desalinated by distillation is injected into the battery liquid flow network circuit via a clean water pipeline network.

[0008] In some embodiments of this application, the distillation column is divided into three sections: upper, middle, and lower; the plurality of distillation columns include a first distillation column and a second distillation column; the desalination module further includes a seawater circulation loop in which seawater circulates in a loop composed of a second submersible pump module, a second heat exchanger module, and a heating module; the second submersible pump module includes a fourth submersible pump and a fifth submersible pump, and the second heat exchanger module includes a fourth heat exchanger and a fifth heat exchanger; both the fourth and fifth submersible pumps are located in the seawater; the fourth heat exchanger is located in the upper section of the first distillation column, and the fifth heat exchanger is located in the upper section of the second distillation column; the heating module is located outside the second distillation column; a plurality of nozzles are provided on the seawater circulation loop located in the lower section of the first distillation column and the lower section of the second distillation column; seawater is pumped into the pipeline of the seawater circulation loop by the fourth submersible pump, and passes sequentially through the fourth heat exchanger, the fifth heat exchanger, and the heating module; a portion of the seawater heated by the heating module enters the first and second distillation columns through the plurality of nozzles, while the other portion of the seawater flows into the ocean through the fifth submersible pump.

[0009] In some embodiments of this application, a first water collection tank is provided in the middle section of the first distillation tower, and a second water collection tank is provided in the middle section of the second distillation tower; seawater heated by the heating module is sprayed into the lower section of the first distillation tower and the lower section of the second distillation tower through the multiple nozzles, and water vapor evaporates on the surface of the heated seawater, achieving separation of salt and water vapor in the seawater during the evaporation process; the water vapor enters the upper section of the first distillation tower and the upper section of the second distillation tower from top to bottom, and is condensed by the fourth heat exchanger and the fifth heat exchanger, respectively, and the purified water after condensation flows into the first water collection tank and the second water collection tank, and is filled into the battery liquid flow pipeline circuit through the purified water pipeline network.

[0010] In some embodiments of this application, the submersible pump module 2 further includes a sixth submersible pump connected to the first water collection tank and a seventh submersible pump connected to the second water collection tank; purified water is pumped to the purified water pipeline network via the sixth and seventh submersible pumps, and then sent to the battery liquid flow pipeline network loop by the purified water pipeline network to participate in the thermal management of the energy storage battery module.

[0011] In some embodiments of this application, a first switching valve is provided on the pipeline between the submersible pump module and the liquid flow cooling plate, and a second switching valve is also provided on the pipeline of the purified water network.

[0012] In some embodiments of this application, a first fan is provided in the middle section of the first distillation column, and a second fan is provided in the middle section of the second distillation column. The first fan and the second fan are used to accelerate seawater evaporation.

[0013] In some embodiments of this application, a method for desalination and scale prevention using thermal management of marine energy storage batteries is also provided, employing the aforementioned thermal management desalination and scale prevention device, including the following modes: Seawater multi-stage distillation purification and regeneration mode: With the second switch valve closed, seawater is pumped into the seawater circulation loop pipeline by the fourth submersible pump, passing sequentially through the fourth heat exchanger, the fifth heat exchanger, and the heating module. A portion of the seawater heated by the heating module enters the first and second distillation towers via multiple nozzles, while the remaining seawater flows into the ocean via the fifth submersible pump. The heated seawater is sprayed into the lower sections of the first and second distillation towers via the multiple nozzles. Water vapor evaporates from the surface of the heated seawater, separating salt and water vapor during the evaporation process. The water vapor flows from top to bottom into the upper sections of the first and second distillation towers, exchanging heat with the fourth and fifth heat exchangers respectively. The condensed purified water flows into the first and second water collection tanks and is then injected into the battery liquid flow network loop via the purified water pipeline network. When the water level in the first and second water collection tanks reaches the preset water level height, the water purification network filling mode is entered: at this time, the second switch valve is opened, the submersible pump module one and the first switch valve are closed, the sixth and seventh submersible pumps are opened, and the purified water in the first and second water collection tanks is pumped to the water purification network, and then sent to the battery liquid flow network circuit through the water purification network. After the battery fluid flow network loop is filled with purified water, the purified water is managed for both liquid cooling and heating: the second switch valve is closed, the first switch valve is opened, and the submersible pump module one is started to perform purified water cooling circulation. The purified water enters the liquid flow cold plate through the cold plate inlet, exchanges heat with the energy storage battery module, and then flows into the heat exchanger module one through the cold plate outlet. It then exchanges heat with seawater at different depths to perform thermal management circulation.

[0014] In some embodiments of this application, when seawater is used for heat exchange in the energy storage battery module, a multi-stage distillation and purification regeneration mode of seawater is simultaneously implemented. The second switch valve, the sixth submersible pump, and the seventh submersible pump are turned on, and purified water enters the battery liquid flow pipeline circuit. When the water level in the first and second water collection tanks drops, the sixth and seventh submersible pumps are turned off, the second switch valve is turned off, and the multi-stage distillation and purification regeneration mode of seawater is continued to be activated so that the water level in the water collection tanks meets the requirements.

[0015] In some embodiments of this application, during peak power consumption periods for offshore platforms and oil drilling rigs, the energy storage power station module discharges. At this time, the first switching valve is opened, and the battery liquid flow network forms a water circulation flow under the rotation speed of the submersible pump module one. Purified water enters the liquid flow cold plate from the cold plate inlet and absorbs the heat generated by the energy storage battery module. After heat exchange, the purified water flows from the cold plate outlet into the heat exchanger module one and exchanges heat with the seawater in the ocean to ensure the reasonable operation of the energy storage battery module.

[0016] Compared with the prior art, this application has at least the following technical effects: (1) This application proposes a liquid flow heat management system and method for seawater, which provides a liquid flow heat exchange system for marine wind and solar power energy storage battery system using seawater at different depths, while also achieving scale prevention in the seawater desalination heat exchange system.

[0017] (2) The seawater used in this application can be seawater, which is readily available locally and more convenient, reducing the maintenance cost of the thermal management system of the offshore platform and eliminating the need for fluid replenishment. Offshore platforms are far from the mainland, making maintenance extremely inconvenient, such as requiring personnel to check the tides before landing on the platform. Therefore, using seawater as a medium locally can reduce the need for subsequent maintenance after replacing the coolant, reduce the number of times offshore platform maintenance personnel need to land, and lower the system maintenance cost.

[0018] (3) Through the desalination module of this application, seawater is subjected to multi-stage distillation desalination treatment, reducing scaling and corrosion problems of liquid flow cold plates and liquid flow pipelines, while solving the problem of increased costs caused by using permeation membrane desalination. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a partial schematic diagram of the thermal management desalination and scale prevention system in some embodiments of this application. Figure 1 ; Figure 2 This is a partial schematic diagram of the thermal management desalination and scale prevention system in some embodiments of this application. Figure 2 ; Figure 3 This is a schematic diagram of the desalination module in some embodiments of this application; Figure 4 This is a schematic diagram of the thermal management desalination and scale prevention system in some embodiments of this application. Figure 4 ; Figure 5 This is a schematic diagram of the seawater flow direction in the thermal management desalination and scale prevention method in some embodiments of this application. Figure 1 ; Figure 6 This is a schematic diagram of the seawater flow direction in the thermal management desalination and scale prevention method in some embodiments of this application. Figure 2 ; Figure 7 This is a schematic diagram of the seawater flow direction in the thermal management desalination and scale prevention method in some embodiments of this application. Figure 3 ; Among them, 101, energy storage battery module; 102, liquid flow cooling plate; 103, energy storage prefabricated compartment; 104, battery busbar; 105, signal acquisition harness; 106, inverter compartment; 201, oil drilling equipment; 202, staff dormitory; 203, offshore platform; 204, shallow seawater current; 301, cooling plate inlet; 302, cooling plate outlet; 303, liquid flow pipeline network; 304, exhaust valve; 305, first submersible pump; 306, first heat exchanger. 400. Membrane desalination device; 401. Mid-level ocean current; 402. Second heat exchanger; 403. Second submersible pump; 501. Deep ocean current; 502. Third submersible pump; 503. Third heat exchanger; 600. Distillation column; 701. First fan; 702. Second fan; 703. Fourth heat exchanger; 704. Fifth heat exchanger; 705. Nozzle; 706. Heating module; 707. First water collection tank; 708. Second water collection tank; 801. Seawater circulation loop; 802. Fourth submersible pump; 803. Fifth submersible pump; 804. Sixth submersible pump; 805. Seventh submersible pump; 806. Purified water pipeline; 901. Seawater in the lower section of the distillation tower; 902. Water vapor on the surface of seawater in the lower section of the distillation tower; 903. Condensed purified water; 1001. First switch valve; 1002. Second switch valve; The black arrows indicate the direction of seawater flow. Detailed Implementation

[0021] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of this application, but not all embodiments, and are only used to illustrate this application, and should not be regarded as limiting the scope of this application.

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, 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 pertains.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0024] The following examples, in conjunction with the accompanying drawings, illustrate the concepts. Figures 1-7This application will be described in further detail.

[0025] Further research into the thermal management system of marine energy storage batteries revealed that during the heat exchange process using seawater as a natural medium, issues such as scaling and corrosion of the liquid flow cooling plates and pipe networks arise, necessitating seawater desalination. Common desalination devices employ membrane treatment methods. The working principle of permeate membrane desalination is that the membrane allows water molecules to pass through while blocking salt ions. These membranes are often asymmetric composite membranes made of polyamide (PA) or cellulose acetate (CA). However, during long-term operation, the desalination efficiency of the permeate membrane decreases due to the increased concentration of blocked salt ions. Furthermore, when the submersible pump module speed increases and a large flow rate of seawater is pumped in, the permeate membrane area becomes limited, affecting system flow regulation and seawater salinity.

[0026] In some embodiments of this application, a desalination and scale prevention system for marine environmental energy storage battery liquid flow thermal management is provided, comprising: Multiple energy storage prefabricated modules 103 are placed on the offshore platform 203, and multiple energy storage battery modules 101 are distributed in each energy storage prefabricated module 103; Liquid flow cooling plate 102 is used for heat exchange with energy storage battery module 101. Each energy storage battery module 101 is provided with a corresponding liquid flow cooling plate 102 below it. The inverter compartment 106 performs DC-AC conversion, converting the electrical energy output from the energy storage battery module 101 into AC power for external supply. Heat exchanger module one, located in seawater, is used for heat exchange with seawater; Submersible pump module one, which is located in seawater, is used to pump seawater into heat exchanger module one; The battery fluid flow network loop allows seawater to circulate in a loop consisting of fluid flow cooling plate 102, heat exchanger module 1, and submersible pump module 1. The desalination module includes multiple distillation towers 600, through which seawater desalinated by distillation in the multiple distillation towers is injected into the battery liquid flow network circuit via a purified water network 806.

[0027] In some embodiments of this application, the distillation column 600 is divided into three sections: upper, middle, and lower; the plurality of distillation columns include a first distillation column and a second distillation column; the desalination module further includes a seawater circulation loop 801, in which seawater circulates in a loop composed of a second submersible pump module, a second heat exchanger module, and a heating module 706; the second submersible pump module includes a fourth submersible pump 802 and a fifth submersible pump 803, and the second heat exchanger module includes a fourth heat exchanger 703 and a fifth heat exchanger 704; both the fourth submersible pump 802 and the fifth submersible pump 803 are located in seawater; the fourth heat exchanger 703 is located at the upper part of the first distillation column. The fifth heat exchanger 704 is located in the upper section of the second distillation column; the heating module 706 is located outside the second distillation column; multiple nozzles 705 are installed on the seawater circulation loop 801 located in the lower section of the first distillation column and the lower section of the second distillation column; seawater is pumped into the pipeline of the seawater circulation loop 801 by the fourth submersible pump 802, and passes through the fourth heat exchanger 703, the fifth heat exchanger 704, and the heating module 706 in sequence. A portion of the seawater heated by the heating module 706 enters the first and second distillation columns through the multiple nozzles 705, while the other portion of the seawater flows into the ocean through the fifth submersible pump 803.

[0028] In some embodiments of this application, a first water collection tank 707 is provided in the middle section of the first distillation tower, and a second water collection tank 708 is provided in the middle section of the second distillation tower. Seawater heated by the heating module 706 is sprayed into the lower section of the first distillation tower and the lower section of the second distillation tower through the multiple nozzles 705. Water vapor evaporates from the surface of the heated seawater, and the separation of salt and water vapor in the seawater is achieved during the evaporation process. The water vapor enters the upper section of the first distillation tower and the upper section of the second distillation tower from top to bottom, and is condensed by the fourth heat exchanger 703 and the fifth heat exchanger 704, respectively. The purified water 903 after condensation flows into the first water collection tank 707 and the second water collection tank 708, and is filled into the battery liquid flow network circuit through the purified water pipeline network 806.

[0029] In some embodiments of this application, the submersible pump module 2 further includes a sixth submersible pump 804 connected to the first water collection tank 707 and a seventh submersible pump 805 connected to the second water collection tank 708; purified water is pumped to the purified water pipeline network 806 via the sixth submersible pump 804 and the seventh submersible pump 805, and then sent to the battery liquid flow pipeline network loop by the purified water pipeline network 806 to participate in the thermal management of the energy storage battery module 101.

[0030] In some embodiments of this application, a first switching valve 1001 is provided on the pipeline between the submersible pump module 1 and the liquid flow cooling plate 102, and a second switching valve 1002 is also provided on the pipeline of the water purification network 806.

[0031] In some embodiments of this application, a first fan 701 is provided in the middle section of the first distillation column, and a second fan 702 is provided in the middle section of the second distillation column. The first fan 701 and the second fan 702 are used to accelerate seawater evaporation.

[0032] In some embodiments of this application, a method for desalination and scale prevention using thermal management of marine energy storage batteries is also provided, employing the aforementioned thermal management desalination and scale prevention device, including the following modes: Seawater multi-stage distillation purification and regeneration mode: With the second switch valve 1002 closed, seawater is pumped into the seawater circulation loop 801 by the fourth submersible pump 802, passing sequentially through the fourth heat exchanger 703, the fifth heat exchanger 704, and the heating module 706. A portion of the seawater heated by the heating module 706 enters the first and second distillation towers via the multiple nozzles 705, while the remaining seawater flows into the ocean via the fifth submersible pump 803. The seawater heated by the heating module 706 flows through the multiple nozzles 705... 5. The water vapor is injected into the lower section of the first distillation column and the lower section of the second distillation column. The heated seawater surface evaporates, and the salt and water vapor in the seawater are separated during the evaporation process. The water vapor enters the upper section of the first distillation column and the upper section of the second distillation column from top to bottom, and exchanges heat with the fourth heat exchanger 703 and the fifth heat exchanger 704 respectively. The purified water 903 after condensation falls into the first water collection pool 707 and the second water collection pool 708 under the action of gravity, and is filled into the battery liquid flow pipeline circuit through the purified water pipeline network 806. When the water levels in the first water collection tank 707 and the second water collection tank 708 reach the preset water level height, the water purification network 806 is filled into mode: at this time, the second switch valve 1002 is opened, the submersible pump module 1 and the first switch valve 1001 are closed, the sixth submersible pump 804 and the seventh submersible pump 805 are opened, and the purified water in the first water collection tank 707 and the second water collection tank 708 is pumped to the water purification network 806, and then sent to the battery liquid flow network circuit through the water purification network 806. After the battery fluid flow network loop is filled with purified water, the purified water is managed for both liquid cooling and heating: the second switch valve 1002 is closed, the first switch valve 1001 is opened, the submersible pump module one is started, and the purified water is circulated for liquid cooling. The purified water enters the liquid flow cold plate 102 through the cold plate inlet 301, exchanges heat with the energy storage battery module 101, and then flows into the heat exchanger module one through the cold plate outlet 302. It then exchanges heat with seawater at different depths for thermal management circulation.

[0033] In some embodiments of this application, when seawater is used for heat exchange in the energy storage battery module 101, a multi-stage distillation and purification regeneration mode of seawater is simultaneously implemented. The second switch valve 1002, the sixth submersible pump 804, and the seventh submersible pump 805 are turned on, and purified water enters the battery liquid flow pipeline circuit. When the water level in the first collection tank 707 and the second collection tank 708 drops, the sixth submersible pump 804 and the seventh submersible pump 805 are turned off, the second switch valve 1002 is turned off, and the multi-stage distillation and purification regeneration mode of seawater is continued to be activated so that the water level in the collection tank meets the requirements.

[0034] In some embodiments of this application, during peak power consumption of offshore platforms and oil drilling equipment, the energy storage power station module discharges. At this time, the first switch valve 1001 is opened, and the battery liquid flow network forms a water circulation flow under the rotation speed of the first submersible pump 305. Purified water enters the liquid flow cold plate 102 from the cold plate inlet 301 and absorbs the heat generated by the energy storage battery module. After heat exchange, the purified water flows from the cold plate outlet 302 into the heat exchanger module one and exchanges heat with the natural cooling medium seawater in the deep sea to ensure that the energy storage battery module operates within a reasonable temperature range (20-25℃) and ensures temperature uniformity (≤5℃).

[0035] In some embodiments of this application, the heat exchanger module is configured in parallel as multiple modules, including a first heat exchanger 306, a second heat exchanger 402, and a third heat exchanger 503; depending on the depth of the seawater where the heat exchangers are located, the depth of the seawater where the first heat exchanger 306 is located is less than the depth of the seawater where the second heat exchanger 402 is located, which is less than the depth of the seawater where the third heat exchanger 503 is located; as the depth of the seawater increases, the temperature of the seawater gradually decreases, and the temperature of the seawater at the depth of the first heat exchanger 306 is greater than the temperature of the seawater at the depth of the second heat exchanger 402, which is greater than the temperature of the seawater at the depth of the third heat exchanger 503.

[0036] In some embodiments of this application, the first heat exchanger 306, the second heat exchanger 402, and the third heat exchanger 503 should each be connected in series with a first submersible pump 305, a second submersible pump 403, and a third submersible pump 502; the end of the third submersible pump away from the third heat exchanger 503 is connected between the second heat exchanger 402 and the second submersible pump 403, and the end of the third heat exchanger 503 away from the third submersible pump 502 is connected to the end of the second heat exchanger 402 away from the second submersible pump 403; the end of the second submersible pump 403 away from the second heat exchanger 402 is connected to the pipeline between the first submersible pump 305 and the first heat exchanger 306, and the end of the second heat exchanger 402 away from the second submersible pump 403 is connected to the end of the first heat exchanger 306 away from the first submersible pump 305.

[0037] In some embodiments of this application, shallow ocean currents 204, mid-level ocean currents 401, and deep ocean currents 501 are used to exchange heat with the first heat exchanger 306, the second heat exchanger 402, and the third heat exchanger 503, respectively.

[0038] In some embodiments of this application, the first heat exchanger 306 is located in seawater at a depth of 0-10 meters, the second heat exchanger 402 is located in seawater at a depth of 10-30 meters, and the third heat exchanger 503 is located in seawater at a depth greater than 30 meters.

[0039] In some embodiments of this application, under summer operating conditions, the seawater temperature at the location of the first heat exchanger 306 is in the range of 20-25°C, the seawater temperature at the location of the second heat exchanger 402 is in the range of 15-20°C, and the seawater temperature at the location of the third heat exchanger 503 is in the range of 10-15°C.

[0040] In some embodiments of this application, under winter operating conditions, the seawater temperature at the location of the first heat exchanger 306 is 10-15°C. Seawater has a large specific heat capacity, and its temperature decreases slowly. However, as the depth increases, the temperature decreases, but there is a shallow transition zone, which is suitable for preheating the battery module in winter.

[0041] In some embodiments of this application, the submersible pump module 1 pumps seawater into the liquid flow network 303. The liquid flow network 303 enters the liquid flow cold plate 102 through the cold plate inlet 301 and exchanges heat with the energy storage battery module 101 in a non-contact manner. After heat exchange, the seawater carrying the battery heat flows out through the cold plate outlet 302 and returns to the heat exchanger module 1. In the heat exchanger module 1, the seawater exchanges heat with the seawater outside the heat exchanger module 1 and circulates according to actual needs.

[0042] In some embodiments of this application, multiple energy storage prefabricated chambers 103 are spaced apart, and the liquid flow cooling plate 102 corresponding to the energy storage battery module 101 in each energy storage prefabricated chamber 103 is connected in parallel with the liquid flow cooling plate 102 corresponding to the energy storage battery module 101 in the adjacent energy storage prefabricated chamber 103; seawater pumped from the submersible pump module 1 flows through the liquid flow pipeline network 303 and enters the multiple liquid flow cooling plates corresponding to the multiple energy storage battery modules 101 in the multiple energy storage prefabricated chambers 103 to exchange heat with the energy storage battery modules 101. The seawater after heat exchange flows through the cold plate outlet 302 to the battery liquid flow pipeline network loop to exchange heat with the multiple energy storage prefabricated chambers 103 and ensure that the energy storage battery modules 101 operate within a suitable temperature range.

[0043] In some embodiments of this application, the current output from multiple individual cells of the energy storage battery module 101 connected in parallel is collected by the battery bus 104 to form a total output current.

[0044] In some embodiments of this application, an exhaust valve 304 is provided at the end of the liquid flow network 303 and is arranged obliquely upward, so that the air carried in the seawater can be discharged through the exhaust valve 304 at the end.

[0045] In some embodiments of this application, signals from the energy storage battery module 101, the staff dormitory 202, and the oil drilling rig 201 are acquired via the signal acquisition harness 105. The signals include information such as required power and temperature.

[0046] In some embodiments of this application, the external supply of electrical energy converted by the inverter refers to providing electricity to the oil drilling rig 201 of the offshore platform 203 and / or the accommodation of the personnel of the offshore platform 203.

[0047] In other embodiments of this application, the thermal management desalination and scale prevention method further includes: Under summer operating conditions, the following steps are included: The system determines whether the temperature of the energy storage battery module exceeds 45°C. If it does, a third heat exchanger is used to exchange heat with the surrounding seawater, i.e., deep seawater heat exchange mode. If the temperature of the energy storage battery module is between 35-45°C, a second heat exchanger is used to exchange heat with the seawater, i.e., mid-level seawater heat exchange mode. If the battery temperature is between 25-35°C, a first heat exchanger is used to exchange heat with the seawater, i.e., shallow seawater heat exchange mode. The above three methods can be used in conjunction with each other and activated simultaneously for synergistic heat exchange. Under winter operating conditions, the following steps are included: First, the air temperature Ta is determined. When the ambient temperature is <5℃, the shallow seawater heat exchange mode is activated; otherwise, the mode is stopped. When the shallow seawater heat exchange mode is activated, the temperature of the energy storage battery module is determined. When the battery temperature Tb is <10℃, the seawater flow rate is increased until the energy storage battery module reaches the preset temperature, and then the shallow seawater heat exchange mode is stopped.

[0048] In some embodiments of this application, the seawater flow rate is increased by increasing the flow rate of the first submersible pump.

[0049] In some embodiments of this application, based on the vertical distribution characteristics of seawater temperature, seawater is directly used as a natural cold source to achieve liquid cooling heat exchange for the marine platform 203 energy storage power station; different working modes are achieved according to different seawater depths and temperatures: deep seawater heat exchange mode, mid-level seawater heat exchange mode, and shallow seawater heat exchange mode.

[0050] In some embodiments of this application, the thermal management desalination and scale prevention method specifically includes: When the temperature of the energy storage battery module 101 is greater than 25°C and less than 35°C, the shallow seawater heat exchange mode is activated. At this time, the third submersible pump 502 and the second submersible pump 403 are turned off, and only the first submersible pump 305 is turned on. When the first submersible pump 305 pumps seawater, the seawater enters the liquid flow network 303. The seawater enters the corresponding cold plate through the cold plate inlet 301, and the corresponding energy storage battery module 101 performs non-contact heat exchange. The seawater flows out through the cold plate outlet 302 and enters the liquid flow network 303. Then it enters the first heat exchanger 306. In the first heat exchanger 306, the seawater washes the fins of the first heat exchanger 306 to enhance the seawater heat exchange. When the temperature of the energy storage battery module 101 is greater than 35°C and less than 45°C, the middle layer seawater heat exchange mode is activated. At this time, the third submersible pump 502 and the first submersible pump 305 are turned off, and only the second submersible pump 403 is turned on. Seawater is pumped in by the second submersible pump 403 and pumped into the liquid flow network 303. The seawater enters the corresponding cold plate through the cold plate inlet 301 and the corresponding energy storage battery module 101 performs non-contact heat exchange. It flows out through the cold plate outlet 302 and enters the liquid flow network 303, and then enters the second heat exchanger 402. In the first heat exchanger 306, the seawater washes the fins of the first heat exchanger 306 to enhance the seawater heat exchange. When the temperature of the energy storage battery module 101 exceeds 45°C, the deep seawater heat exchange mode is activated. At this time, the first submersible pump 305 and the second submersible pump 403 are turned off, and only the third submersible pump 502 is turned on. The third submersible pump 502 pumps seawater into the liquid flow network 303. The seawater enters the corresponding cold plate through the cold plate inlet 301, and the corresponding energy storage battery module 101 performs non-contact heat exchange. The seawater flows out through the cold plate outlet 302 and enters the liquid flow network 303, and then enters the third heat exchanger 503. In the first heat exchanger 306, the seawater washes the fins of the first heat exchanger 306, enhancing the seawater heat exchange.

[0051] In some embodiments of this application, after the first submersible pump 305, the second submersible pump 403 and the third submersible pump 502 pump seawater, the corresponding submersible pumps can be shut down as needed.

[0052] In some embodiments of this application, the marine environmental energy storage platform includes a DC side and an AC side inverter. The DC-side battery discharge power of the energy storage battery module 101 is converted from DC to AC in the AC inverter compartment 106 to provide mechanical power for oil drilling on the marine platform 203 and to provide electricity for the accommodation of the personnel on the marine platform 203. During the operation of the energy storage battery module 101, heat is generated. The thermal management system and methods ensure that the battery operating temperature is within a reasonable range (20-25°C) and that the battery temperature is consistent (≤5°C).

[0053] In some embodiments of this application, when the power battery system or electrochemical energy storage system for land vehicles adopts a liquid flow thermal management method, a coolant (50% deionized water + 50% ethylene glycol) is often used as the medium. In the liquid flow thermal management of the energy storage system for the offshore platform 203, seawater can be directly pumped into the deep sea.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A desalination and scale prevention system for liquid flow thermal management of marine energy storage batteries, characterized in that, include: Multiple energy storage prefabricated modules are placed on an offshore platform, and each energy storage prefabricated module contains multiple energy storage battery modules; The liquid flow cooling plate is used for heat exchange with the energy storage battery module. Each energy storage battery module has a corresponding liquid flow cooling plate installed below it. The inverter compartment is where DC-AC conversion is performed, converting the electrical energy output from the energy storage battery module into AC power for external supply. Heat exchanger module one, located in seawater, is used for heat exchange with seawater; Submersible pump module one, which is located in seawater, is used to pump seawater into heat exchanger module one; The battery fluid flow network loop allows seawater to circulate in a loop consisting of a fluid flow cooling plate, a heat exchanger module 1, and a submersible pump module 1. The desalination module includes multiple distillation towers, through which seawater desalinated by distillation is injected into the battery liquid flow network circuit via a clean water pipeline network.

2. The marine environment energy storage battery liquid flow thermal management desalination and scale prevention system according to claim 1, characterized in that, The distillation tower is divided into three sections: upper, middle, and lower. The multiple distillation towers include a first distillation tower and a second distillation tower. The desalination module also includes a seawater circulation loop, where seawater circulates in a loop composed of a second submersible pump module, a second heat exchanger module, and a heating module. The second submersible pump module includes a fourth submersible pump and a fifth submersible pump, and the second heat exchanger module includes a fourth heat exchanger and a fifth heat exchanger. Both the fourth and fifth submersible pumps are located in the seawater. The fourth heat exchanger is located in the upper section of the first distillation tower, and the fifth heat exchanger is located in the upper section of the second distillation tower. The heating module is located outside the second distillation tower. Multiple nozzles are installed on the seawater circulation loop located in the lower sections of the first and second distillation towers. Seawater is pumped into the seawater circulation loop by the fourth submersible pump, passing sequentially through the fourth heat exchanger, the fifth heat exchanger, and the heating module. A portion of the seawater heated by the heating module enters the first and second distillation towers via the multiple nozzles, while the remaining seawater flows into the ocean via the fifth submersible pump.

3. The marine environment energy storage battery liquid flow thermal management desalination and scale prevention system according to claim 2, characterized in that, The first distillation tower has a first water collection tank in its middle section, and the second distillation tower has a second water collection tank in its middle section. Seawater heated by the heating module is sprayed into the lower sections of the first and second distillation towers through the multiple nozzles. Water vapor evaporates from the surface of the heated seawater, and the separation of salt and water vapor in the seawater is achieved during the evaporation process. The water vapor flows from top to bottom into the upper sections of the first and second distillation towers, where it is condensed by the fourth and fifth heat exchangers, respectively. The purified water after condensation flows into the first and second water collection tanks and is then injected into the battery liquid flow network circuit through the purified water pipeline network.

4. The marine environment energy storage battery liquid flow thermal management desalination and scale prevention system according to claim 3, characterized in that, The second submersible pump module also includes a sixth submersible pump connected to the first water collection tank and a seventh submersible pump connected to the second water collection tank; purified water is pumped to the purified water pipeline network via the sixth and seventh submersible pumps, and then sent to the battery liquid flow pipeline network loop by the purified water pipeline network to participate in the thermal management of the energy storage battery module.

5. The marine environment energy storage battery liquid flow thermal management desalination and scale prevention system according to claim 4, characterized in that, A first switching valve is installed on the pipeline between the submersible pump module and the liquid flow cooling plate, and a second switching valve is also installed on the pipeline of the water purification network.

6. The marine environment energy storage battery liquid flow thermal management desalination and scale prevention system according to claim 2, characterized in that, The first distillation column is equipped with a first fan in the middle section, and the second distillation column is equipped with a second fan in the middle section. The first fan and the second fan are used to accelerate seawater evaporation.

7. A method for desalination and scale prevention in marine environmental energy storage batteries using thermal management of electrolyte flow, comprising the following modes: Seawater multi-stage distillation purification and regeneration mode: With the second switch valve closed, seawater is pumped into the seawater circulation loop pipeline by the fourth submersible pump, passing sequentially through the fourth heat exchanger, the fifth heat exchanger, and the heating module. A portion of the seawater heated by the heating module enters the first and second distillation towers via multiple nozzles, while the remaining seawater flows into the ocean via the fifth submersible pump. The heated seawater is sprayed into the lower sections of the first and second distillation towers via the multiple nozzles. Water vapor evaporates from the surface of the heated seawater, separating salt and water vapor during the evaporation process. The water vapor flows from top to bottom into the upper sections of the first and second distillation towers, exchanging heat with the fourth and fifth heat exchangers respectively. The condensed purified water flows into the first and second water collection tanks and is then injected into the battery liquid flow network loop via the purified water pipeline network. When the water level in the first and second water collection tanks reaches the preset water level height, the water purification network filling mode is entered: at this time, the second switch valve is opened, the submersible pump module one and the first switch valve are closed, the sixth and seventh submersible pumps are opened, and the purified water in the first and second water collection tanks is pumped to the water purification network, and then sent to the battery liquid flow network circuit through the water purification network. After the battery fluid flow network loop is filled with purified water, the purified water is managed for both liquid cooling and heating: the second switch valve is closed, the first switch valve is opened, and the submersible pump module one is started to perform purified water cooling circulation. The purified water enters the liquid flow cold plate through the cold plate inlet, exchanges heat with the energy storage battery module, and then flows into the heat exchanger module one through the cold plate outlet. It then exchanges heat with seawater at different depths to perform thermal management circulation.

8. The method for desalination and scale prevention of marine environmental energy storage battery liquid flow thermal management according to claim 7, characterized in that, When seawater is used for heat exchange in the energy storage battery module, a multi-stage distillation and purification regeneration mode of seawater is simultaneously implemented. The second switch valve, the sixth submersible pump, and the seventh submersible pump are turned on, and purified water enters the battery liquid flow pipeline circuit. When the water level in the first and second water collection tanks drops, the sixth and seventh submersible pumps are turned off, the second switch valve is turned off, and the multi-stage distillation and purification regeneration mode of seawater is turned on again to ensure that the water level in the water collection tank meets the requirements.

9. A method for desalination and scale prevention in marine environmental energy storage battery liquid flow thermal management according to claim 7, characterized in that, During peak power consumption periods for offshore platforms and oil drilling rigs, the energy storage power station module discharges. At this time, the first switching valve is opened, and the battery liquid flow network forms a water circulation flow under the rotation speed of submersible pump module one. Purified water enters the liquid flow cold plate from the cold plate inlet, absorbing the heat generated by the energy storage battery module. After heat exchange, the purified water flows from the cold plate outlet into heat exchanger module one, where it exchanges heat with seawater in the ocean, ensuring that the energy storage battery module operates within the preset temperature range.

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