A high-power underwater-mounted marine charging device and its operation method

Abstract

This invention discloses an underwater-mounted high-power marine charging device and its operating method, belonging to the technical field of marine charging equipment. It includes a shell and an electrical compartment, with the electrical compartment located inside the shell, which is a right-angled triangle. A seawater cooling system is installed on the shell, comprising a seawater channel, a cooling plate, and a heat exchange wall. The seawater channel is connected to seawater, and the heat from the cooling plate is conducted to the seawater channel through the heat exchange wall. A charging power module and a temperature sensor are connected to the cooling plate. The charging power module is connected to a waterproof cable, with a charging gun connected to the end of the waterproof cable furthest from the charging power module. Addressing the problems of existing marine charging piles, such as large footprint, difficult heat dissipation, poor corrosion resistance, inconvenient charging operation, and insufficient underwater stability when installed on shore, this application provides a 720kW marine charging pile with a right-angled triangular fully waterproof structure, submerged underwater, directly cooled by seawater, and with the charging gun suspended on the shore.

Description

Technical Field

[0001] This invention relates to the technical field of ship charging equipment, and in particular to an underwater-mounted high-power marine charging device and its operating method. Background Technology

[0002] Currently, with the electrification transformation of coastal shipping, the number of electric vessels is growing rapidly. The charging demands of large-capacity power batteries are placing higher requirements on shore-based charging infrastructure. Most existing ship charging piles are structured similarly to land-based charging piles and installed on docks or floating pontoons, presenting the following prominent problems:

[0003] First, traditional charging piles use air cooling or forced liquid cooling for heat dissipation. For high-power charging modules of 720kW and above, the heat sink is bulky and the fan noise is high. In addition, the high humidity and seawater salt spray environment at the dock can easily cause electrical components to corrode and fail, making it difficult to maintain the protection level of IP65 or above for a long time.

[0004] Secondly, conventional rectangular or columnar charging piles occupy a large area, extending beyond the wharf surface and affecting ship berthing and wharf operations. The long cable between the pile and the charging gun poses a risk of dragging and wear, and the charging gun is usually located on the side of the pile, requiring manual pulling of the cable to the charging port on the ship after docking, which is inconvenient.

[0005] Third, dock space is precious, and many old docks cannot accommodate the addition of large-scale charging facilities. If charging piles were to be installed entirely on the shore, the dock structure would need to be modified, resulting in a large amount of work and high costs.

[0006] Fourth, seawater is a high-quality and inexhaustible cooling medium, but existing charging piles rarely use seawater for direct cooling, mainly due to concerns about seawater corrosion and electrical insulation issues.

[0007] Fifth, most existing underwater charging devices adopt a cylindrical structure, which has poor underwater stability and is easily displaced or overturned by water flow.

[0008] Regarding the aforementioned technologies, the applicant discovered that designing a charging pile that is fully submerged underwater, utilizes seawater to directly cool the charging module, and ensures electrical safety could significantly improve heat dissipation, save onshore space, and extend equipment lifespan. Conversely, right-angled or triangular shells offer better fluid guidance and impact resistance in water currents, and are easier to moor and position.

[0009] Therefore, there is an urgent need for a marine high-power charging device that is compact, fully waterproof, installed underwater, directly cooled by seawater, has the charging gun suspended on the shore, and supports 720kW high-power charging, in order to overcome the above-mentioned defects. Summary of the Invention

[0010] This invention addresses the shortcomings of existing technologies by providing an underwater-mounted high-power marine charging device and its operation method. It addresses the problems of existing marine charging piles, such as large land occupation, difficulty in heat dissipation, poor corrosion resistance, inconvenient charging operation, and insufficient underwater stability when installed on shore. The invention provides a 720kW marine charging pile with a right-angled triangular fully waterproof structure, submerged underwater, directly cooled by seawater, and with the charging gun suspended on the shore.

[0011] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0012] An underwater-mounted marine high-power charging device includes a shell and an electrical compartment, with the electrical compartment located inside the shell. The shell is in the shape of a right-angled triangle, with one side of the right-angled side of the shell close to the dock and the other side of the acute-angled side close to the ship. The electrical compartment is equipped with a positive pressure inflation port.

[0013] The shell is equipped with a seawater cooling system, which includes a seawater channel, a cooling base plate, and a heat exchange wall. The seawater channel is located outside the shell or partially embedded inside the shell and is connected to seawater. The cooling base plate is located inside the electrical compartment, and the heat exchange wall is located between the cooling base plate and the seawater channel. The heat is transferred from the cooling base plate to the seawater channel through the heat exchange wall.

[0014] The cooling substrate is connected to a charging power module and a temperature sensor. Both the cooling substrate and the charging power module are placed in the electrical compartment. Thermal grease is applied between the cooling substrate and the charging power module. The cooling substrate and the charging power module are in thermal contact. The charging power module is connected to a waterproof cable. The end of the waterproof cable away from the charging power module is connected to a charging gun.

[0015] Furthermore, it also includes a cable management device, which is a reel or cable chain structure, used to organize and store waterproof cables.

[0016] Furthermore, it also includes a ship communication system, which includes at least one ship proximity detection sensor.

[0017] Furthermore, it also includes an intelligent controller system, which is connected to the seawater cooling system, charging power module, cable management device, and ship communication system via electrical signals.

[0018] Furthermore, the seawater inlet end of the seawater channel is equipped with a filter screen and a device to prevent marine organisms from attaching, and the seawater channel is equipped with a circulation pump and a flow sensor.

[0019] Furthermore, the mounting bottom surface of the housing is provided with a counterweight cavity and / or anchor holes, and the counterweight cavity is filled with concrete and / or cast iron.

[0020] Furthermore, the electrical compartment's connection points are equipped with sealing rings and / or potting sealants.

[0021] Furthermore, the ratio of the length of the right-angled side of the shell is 1:1.5 to 1:3, and the angle between the hypotenuse and the horizontal plane is 15° to 45°.

[0022] An operating method for an underwater-mounted marine high-power charging device includes the following steps:

[0023] After the S1 ship proximity detection sensor detects that the ship has entered the designated berthing area, the intelligent control system wakes up the charging power module and starts the preparatory cycle of the seawater cooling system.

[0024] After the S2 vessel comes to a complete stop, the crew or shore-based operator removes the charging gun and inserts it into the vessel's charging socket; or the charging gun is automatically extended by a robotic arm and docks with the vessel's charging socket.

[0025] After the S3 charging gun is connected to the ship for charging, the intelligent controller system obtains the relevant parameters of the ship. The intelligent controller system controls the charging power module to charge at the set power and automatically adjusts the flow rate of the seawater cooling system according to the temperature of the charging power module fed back by the temperature sensor.

[0026] After the S4 completes charging or receives a stop command, the intelligent controller system controls the charging power module to stop outputting, the charging gun is pulled out, and the waterproof cable is retracted through the cable management device, thus completing the charging process.

[0027] Furthermore, when the temperature sensor reports an excessively high temperature or the seawater flow is insufficient, causing the temperature of the charging power module to exceed the threshold, the intelligent controller system automatically reduces the power until it shuts down for protection.

[0028] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0029] 1. The right-angled triangular structure of this application has the effect of improving underwater stability. The cross-section of the shell is a right-angled triangle, the wide base increases the contact area with the underwater foundation, and the inclined surface can guide the flow direction and reduce the impact force of the water flow. The resistance to water flow and tipping is more than 50% higher than that of the cylindrical shape.

[0030] 2. This application is fully waterproof and sealed, with an IP68 rating for safety and reliability. It features double-layer sealing and potting treatment, allowing it to be submerged at a depth of 15 meters for extended periods, preventing seawater from seeping into the electrical compartment and ensuring the safe operation of the 720kW high-voltage electrical system.

[0031] 3. This application uses seawater direct cooling, which has extremely high heat dissipation efficiency. It uses endless seawater as a cooling medium to conduct high-power electrical heat to the seawater channel through the cooling substrate. No additional cooling fan or large heat exchanger is required, which significantly reduces size and noise and supports continuous output of 720kW.

[0032] 4. This application saves shore space and beautifies the dock environment. The charging equipment itself is completely submerged underwater, and only the charging gun occupies very little shore space, making it particularly suitable for passenger terminals, cargo terminals and yacht harbors with limited space.

[0033] 5. The charging gun of this application can be suspended on the shore, making it easy to operate. The charging gun is fixed on the shore and can be directly used after the ship is moored. The waterproof charging cable is short and easy to manage, eliminating the need to pull long and heavy cables.

[0034] 6. This application features a design that resists seawater corrosion. The shell is made of 316L stainless steel or high-polymer composite material, and the seawater flow channel is made of copper-nickel alloy. Combined with a device to prevent marine organisms from attaching, the lifespan is more than 15 years. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0036] Figure 2 This is a cross-sectional view of the internal structure of the housing in an embodiment of the present invention;

[0037] Figure 3 This is a partially enlarged schematic diagram of the seawater cooling system in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the charging gun suspension and storage according to an embodiment of the present invention;

[0039] Figure 5 This is a logic diagram of the intelligent controller system in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Shell; 2. Electrical compartment; 3. Charging power module; 4. Waterproof cable; 5. Charging gun; 6. Cantilever support; 7. Seawater cooling system; 71. Seawater flow channel; 72. Cooling base plate; 73. Temperature sensor; 8. Cable management device; 9. Intelligent controller system; 10. Ship communication system; 11. Ship proximity detection sensor; 12. Counterweight chamber. Detailed Implementation

[0042] The principles and features of the present invention are described below with reference to all the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0043] This invention discloses an underwater-mounted marine high-power charging device and its operation method.

[0044] Reference Figures 1 to 5As shown, an underwater-mounted marine high-power charging device includes a housing 1 and an electrical compartment 2. The electrical compartment 2 is located inside the housing 1, and the connection points of the electrical compartment 2 are equipped with sealing rings and / or potting sealant. The electrical compartment 2 is a fully waterproof sealed structure. The hatch of the electrical compartment 2 and all connectors penetrating the housing 1 are sealed with double-layer sealing rings and potting sealant. The overall protection level reaches IP68 (15 meters underwater). IP68 is an international protection level standard, indicating complete dustproof protection and long-term immersion at a depth of 15 meters.

[0045] Electrical compartment 2 is equipped with a positive pressure inflation port for draining water accumulated inside the compartment during maintenance.

[0046] In the fully waterproof and sealed structure, the door of the electrical compartment 2 is set on the inclined surface or right angle surface of the right-angled triangular shell 1. The door and the shell 1 are sealed with a double seal of O-ring and rectangular ring, and the fastening bolts are stainless steel anti-loosening bolts.

[0047] The shell 1 is in the shape of a right triangle. The right triangle shell 1 is a columnar shell 1 with a right triangle cross section, which has excellent hydrodynamic stability and impact resistance.

[0048] One side of the right-angled edge of the shell 1 is closer to the dock, and the other side of the acute-angled edge is closer to the ship. A counterweight cavity 12 and / or anchor holes are provided on the mounting bottom surface of the shell 1. The counterweight cavity 12 is filled with concrete and / or cast iron. The length ratio of the right-angled edge of the shell 1 is 1:1.5 to 1:3, and the angle between the hypotenuse and the horizontal plane is 15° to 45°. This facilitates water flow guidance, reduces water flow resistance, and increases the self-weight stability of the shell 1. The counterweight cavity 12 at the bottom of the shell 1 can be filled with concrete or cast iron to ensure that the charging pile is stable underwater and does not float. The anchor holes can be fixed to the underwater foundation using stainless steel expansion bolts or anchor rods.

[0049] The right-angled triangular shell 1 is also equipped with ship berthing guidance markings (such as LED light strips or reflective stickers) on its inclined surface to facilitate ship positioning at night or in low visibility conditions.

[0050] The shell 1 is equipped with a seawater cooling system 7, which includes a seawater flow channel 71, a cooling base plate 72, and a heat exchange wall. The seawater flow channel 71 is located outside the shell 1 or partially embedded inside the shell 1, and is connected to seawater, which circulates within the seawater flow channel 71. The cooling base plate 72 is located inside the electrical compartment 2, and is a metal plate (copper or aluminum) with good thermal conductivity, used to absorb heat from the power module and conduct it to the cooling medium. The heat exchange wall is located between the cooling base plate 72 and the seawater flow channel 71, and conducts heat from the cooling base plate 72 to the seawater flow channel 71 through the heat exchange wall.

[0051] The seawater inlet end of the seawater channel 71 is equipped with a filter screen and an anti-marine organism attachment device. The seawater channel 71 is equipped with a circulation pump and a flow sensor. The anti-marine organism attachment device prevents marine organisms (such as barnacles and algae) from growing and clogging the seawater channel 71 by electrolysis or coating of copper mesh.

[0052] The seawater is filtered and circulated through the aforementioned seawater inlet filter, anti-marine organism attachment device (such as copper-based alloy mesh or electrolytic antifouling device), circulation pump (optional natural convection) and flow sensor. The seawater flow channel 71 is made of copper-nickel alloy or engineering plastic (such as PVDF) that is resistant to seawater corrosion.

[0053] A charging power module 3 and a temperature sensor 73 are connected to the cooling base plate 72. Both the cooling base plate 72 and the charging power module 3 are located inside the electrical compartment 2. The rated output power of the charging power module 3 is 720kW, the output voltage range is 200Vdc~1000Vdc, and the output current range is 0A~1200A. The seawater circulation flow rate is adjusted or the charging power is limited based on feedback from the temperature sensor 73.

[0054] Thermal grease is applied between the cooling substrate 72 and the charging power module 3, and the cooling substrate 72 and the charging power module 3 are in thermal contact. The charging power module 3 is connected to a waterproof cable 4, and the end of the waterproof cable 4 away from the charging power module 3 is connected to a charging gun 5. A cantilever bracket 6 can also be provided on the dock for suspending or storing the charging gun 5. The interface of the charging gun 5 faces the water area and is used to connect with the power socket of the docked ship.

[0055] The charging gun 5 is a liquid-cooled charging gun 5, which has a coolant circulation channel inside. This coolant channel is thermally coupled to the seawater cooling system 7 through a heat exchanger to achieve active cooling of the charging gun 5 and the cable, supporting continuous charging of 720kW.

[0056] It also includes a cable management device 8, which is a reel or cable chain structure, used to organize and store the waterproof cable 4. The cable management device 8 can be installed inside the right-angled triangular housing 1 or on the shore, and is used to store and retrieve the waterproof cable 4 connected to the charging gun 5.

[0057] The cable management device 8 can also be a constant tension reel, which is an automatic take-up device that maintains a constant tension on the waterproof cable 4 to prevent the waterproof cable 4 from becoming loose or tangled.

[0058] After the ship docks, the charging gun 5 can be pulled out of the cantilever bracket 6 to an appropriate length. After charging is completed, the cable will automatically retract to prevent the cable from falling into the water or being worn.

[0059] It also includes a ship communication system 10, which includes at least one ship proximity detection sensor 11. The ship proximity detection sensor 11 is disposed on the guide slope of the right-angled triangular housing 1 or on the shore, and is used to detect the ship's docking position and trigger the automatic extension of the charging gun 5 or prompt manual retrieval of the gun.

[0060] It also includes an intelligent controller system 9, which is electrically connected to the seawater cooling system 7, the charging power module 3, the cable management device 8, and the ship communication system 10. The intelligent controller system 9 is located in the electrical compartment 2 and is used to perform charging start / stop control, power regulation, cooling system monitoring, and communication with the ship's BMS.

[0061] It also includes a seawater desalination system and a dry maintenance system. A positive pressure air inlet is provided in the electrical compartment 2. During maintenance, dry air is injected into the electrical compartment 2 to push the water level in the electrical compartment 2 below the bottom, making it convenient for personnel to enter or remotely maintain.

[0062] like Figure 1 As shown, the hull 1 is submerged underwater at the edge of the wharf, and its bottom is fixed to an underwater foundation (such as a concrete slab) by anchor bolts. The cross-section of hull 1 is a right-angled triangle with the following proportions: horizontal base length 2.5m, vertical height 1.5m, hypotenuse length approximately 2.9m, and the angle between the hypotenuse and the horizontal plane approximately 30°. The interior of hull 1 houses a sealed electrical compartment 2, which contains a charging power module 3 (720kW) and an intelligent controller system 9. Ship proximity detection sensors 11 and guide light strips are installed on the inclined surface of hull 1.

[0063] On the shore (dock surface), a cantilever bracket 6 is fixed, and the charging gun 5 is hung on the hook of the suspension bracket with the nozzle of the charging gun 5 facing the water surface. The charging gun 5 is electrically connected to the charging power module 3 inside the housing 1 through a waterproof cable 4. The middle section of the waterproof cable 4 is wound on the cable management device 8 (constant tension reel) and can be automatically wound and unwound.

[0064] like Figure 2 , Figure 3 As shown, the right-angled triangular shell 1 is welded from 316L stainless steel with a wall thickness of 10mm. The electrical compartment 2 is located inside the upper part of the shell 1, with a cavity between it and the shell 1 wall, which forms the seawater flow channel 71. The bottom of the shell 1 has a counterweight cavity 12, which is filled with counterweight material (such as iron ore concrete) with a density ≥3.0g / cm³. Seawater enters the flow channel from the seawater inlet at the front of the shell 1 through the anti-fouling device (copper mesh + electrolytic antifouling), flows over the back of the cooling plate 72, and is discharged from the seawater outlet.

[0065] The charging power module 3 is mounted close to the cooling substrate 72, with thermal grease applied between them. The cooling substrate 72 is made of copper and has fins on its back to enhance heat transfer. The seawater flow channel 71 is designed as a tortuous channel to ensure full contact between the seawater and the back of the cooling substrate 72.

[0066] The hatch of electrical compartment 2 is located on the sloping surface of hull 1 and uses a double seal of O-rings and rectangular rings. All waterproof cable 4 entry points use watertight connectors and are sealed with glue. The entire pile passed the IP68 test (15 meters underwater, 72 hours).

[0067] like Figure 4 As shown, the cantilever bracket 6 is a welded stainless steel square tube structure, fixed to the wharf wall, extending horizontally 1.2m, with a charging gun 5 mount at its end. The charging gun 5 is a liquid-cooled DC charging gun 5, conforming to GB / T20234.4 standard (or marine charging interface standard), with a rated current of 1200A. The waterproof cable 4 is 15m long, accommodating the different charging port locations of various types of ships. The cable management device 8 uses a spring constant tension reel, installed in a protective box, placed on the shore or inside the housing 1.

[0068] like Figure 5 As shown, the intelligent controller system 9 (PLC or embedded industrial computer) is connected to the charging power module 3, the temperature sensor 73 and flow sensor of the seawater cooling system 7, the ship proximity detection sensor 11, the cable management device 8, and the BMS signal of the ship communication system 10. During charging, the intelligent controller system 9 monitors the temperature of the charging power module 3 and automatically adjusts the seawater flow (by controlling the start and stop of the electric valve or circulation pump); when the temperature exceeds 75°C, it starts to reduce power, and when the temperature reaches 85°C, it shuts down in an emergency.

[0069] The intelligent controller system 9 also has the function of communicating with the ship, completing charging handshake, parameter configuration, insulation monitoring and fault protection. The charging protocol is compatible with GB / T27930-2015 and marine extended protocols.

[0070] During installation, first drill anchor holes on the underwater foundation, hoist the shell 1 into position, and tighten the anchor bolts. Connect the underwater cable (from the onshore power distribution room) to the junction box of shell 1. Assemble the charging gun 5 with the cantilever bracket 6 and connect the control signal.

[0071] During maintenance, dry air at 0.02 MPa can be supplied to the electrical compartment 2 via the shore air supply system to blow out any small amount of seawater that may have seeped in through the bottom drain valve. Then, the hatch of the electrical compartment 2 can be opened for inspection. The filter screen and anti-marine organism attachment device at the inlet of the seawater channel 71 need to be energized or replaced periodically.

[0072] Reference Figures 1 to 5 As shown, an operation method for an underwater-mounted marine high-power charging device includes the following steps:

[0073] After the S1 ship proximity detection sensor 11 detects that the ship has entered the designated berthing area, the intelligent control system wakes up the charging power module 3 and starts the preparatory cycle of the seawater cooling system 7.

[0074] After the S2 vessel comes to a complete stop, the crew or shore-based operator removes the charging gun 5 and inserts it into the vessel's charging socket; or the charging gun 5 is automatically extended by the robotic arm and docks with the vessel's charging socket.

[0075] After the S3 charging gun 5 is connected to the ship for charging, the intelligent controller system 9 obtains the relevant parameters of the ship. The intelligent controller system 9 controls the charging power module 3 to charge at the set power and automatically adjusts the flow rate of the seawater cooling system 7 according to the temperature of the charging power module 3 fed back by the temperature sensor 73.

[0076] After S4 completes charging or receives a stop command, the intelligent controller system 9 controls the charging power module 3 to stop outputting, the charging gun 5 is pulled out, and the waterproof cable 4 is retracted through the cable management device 8, thus completing the charging process.

[0077] When the temperature sensor 73 reports an excessively high temperature or the seawater flow channel 71 is insufficient, the temperature of the charging power module 3 exceeds the threshold. The intelligent controller system 9 then automatically reduces the power until it shuts down for protection.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An underwater-mounted marine high-power charging device, comprising a shell (1) and an electrical compartment (2), wherein the electrical compartment (2) is located inside the shell (1), characterized in that: The shell (1) is in the shape of a right triangle. One side of the right angle of the shell (1) is close to the dock, and the other side of the acute angle of the shell (1) is close to the ship. The electrical compartment (2) is equipped with a positive pressure inflation port. The shell (1) is provided with a seawater cooling system (7), which includes a seawater channel (71), a cooling plate (72) and a heat exchange wall. The seawater channel (71) is located outside the shell (1) or partially embedded inside the shell (1). The seawater channel (71) is connected to seawater. The cooling plate (72) is located inside the electrical compartment (2). The heat exchange wall is located between the cooling plate (72) and the seawater channel (71). The heat of the cooling plate (72) is conducted to the seawater channel (71) through the heat exchange wall. The cooling substrate (72) is connected to a charging power module (3) and a temperature sensor (73). Both the cooling substrate (72) and the charging power module (3) are placed in the electrical compartment (2). Thermal grease is applied between the cooling substrate (72) and the charging power module (3). The cooling substrate (72) and the charging power module (3) are in thermal contact. The charging power module (3) is connected to a waterproof cable (4). The end of the waterproof cable (4) away from the charging power module (3) is connected to a charging gun (5).

2. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: It also includes a cable management device (8), which is a reel or cable chain structure, and the waterproof cable (4) is organized and stored through the cable management device (8).

3. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: It also includes a ship communication system (10), which includes at least one ship proximity detection sensor (11).

4. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: It also includes an intelligent controller system (9), which is electrically connected to the seawater cooling system (7), the charging power module (3), the cable management device (8), and the ship communication system (10).

5. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: The seawater inlet end of the seawater channel (71) is equipped with a filter screen and a device to prevent marine organisms from attaching. The seawater channel (71) is equipped with a circulation pump and a flow sensor.

6. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: The mounting bottom surface of the housing (1) is provided with a counterweight cavity (12) and / or anchor holes, and the counterweight cavity (12) is filled with concrete and / or cast iron.

7. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: The electrical compartment (2) is equipped with a sealing ring and / or glue seal at the connection point.

8. The underwater-mounted marine high-power charging device according to claim 1, characterized in that: The ratio of the length of the right-angled side of the shell (1) is 1:1.5 to 1:3, and the angle between the hypotenuse and the horizontal plane is 15° to 45°.

9. An operating method for an underwater-mounted marine high-power charging device, characterized in that, Includes the following steps: After the S1 ship proximity detection sensor (11) detects that the ship has entered the designated berthing area, the intelligent control system wakes up the charging power module (3) and starts the preparatory cycle of the seawater cooling system (7); After the S2 vessel comes to a stop, the crew or shore operator removes the charging gun (5) and inserts it into the vessel's charging socket; or the charging gun (5) is automatically extended by the robotic arm and docks with the vessel's charging socket. After the S3 charging gun (5) is connected to the ship for charging, the relevant parameters of the ship are obtained through the intelligent controller system (9); the intelligent controller system (9) controls the charging power module (3) to charge at the set power, and automatically adjusts the flow rate of the seawater cooling system (7) according to the temperature of the charging power module (3) fed back by the temperature sensor (73); After S4 completes charging or receives a shutdown command, the intelligent controller system (9) controls the charging power module (3) to stop outputting, the charging gun (5) is pulled out, and the waterproof cable (4) is retrieved through the cable management device (8) to complete the charging process.

10. The operating method of an underwater-mounted marine high-power charging device according to claim 9, characterized in that: When the temperature sensor (73) reports an excessively high temperature or the flow rate of the seawater channel (71) is insufficient, the temperature of the charging power module (3) exceeds the threshold, and the intelligent controller system (9) automatically reduces the power until it shuts down for protection.

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