Energy delivery systems and methods of ships

Abstract

[Problem] To efficiently transmit energy resources, such as electricity, to any receiving device without using transmission cables. [Solution] An energy transmission system 100 includes: a transmission vessel 10 equipped with means for storing energy resources; a supply device 20 that supplies energy resources to the means for storing energy resources in the transmission vessel 10; and a receiving device 30 that receives the energy resources supplied from the means for storing energy resources in the transmission vessel 10. Examples of energy resources stored by the means for storing energy resources in the transmission vessel 10 include electricity and hydrogen.

Description

Technical Field

[0001] This invention relates primarily to a system and method for energy transfer between land-based equipment via sea routes using ships. Prior Technology

[0002] Traditionally, in offshore wind power systems, power transmission cables are laid on the seabed or in the sea, and the electricity generated by the offshore power generation equipment is transmitted to the onshore power system via these seabed cables. For example, Patent Document 1 discloses a wiring system in which power transmission cables are laid in a floating state between multiple offshore power generation equipment in order to lay the cables without being affected by the seabed topography. Furthermore, Patent Document 2 discloses a power transmission network system in which a ring-shaped power transmission network is set up to connect the offshore power generation equipment in a manner that surrounds the land, in order to stably supply the electricity generated at sea to the whole country, and power transmission cables are set up from this offshore transmission network to the land. [Known Technical Documents] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2014-093902 [Patent Document 2] Japanese Patent Application Publication No. 2014-158363 Summary of the Invention

[0004] [The problem that the invention aims to solve] Furthermore, conventional systems involve laying transmission cables on the seabed or in the sea to transmit electricity generated by power generation equipment, such as offshore power plants, to receiving equipment on land, and then using these transmission cables to transmit the electricity. However, in addition to the time and cost involved in the installation and maintenance of these conventional systems, there are various other issues, such as the following.

[0005] For example, setting up a power transmission cable in the sea may require procedures such as obtaining a permit from the state or local government, or the installation process may take a long time, and it may take a lot of time before the power generation equipment can start operating.

[0006] Furthermore, the installation of power transmission cables in the sea may have an impact on the natural environment of the sea or seabed, so its installation must be carefully considered. There are also situations where it is impossible to install power transmission cables due to environmental conditions.

[0007] Furthermore, because the power transmission cables are fixed on the seabed or in the sea, there is no choice in which the electricity is transmitted. For example, when transmitting electricity from an offshore power generation facility to a land-based receiving facility via a power transmission cable, the electricity can only be transmitted directly to the fixed receiving facility. Therefore, to transmit electricity from a power generation facility to any other location, it is always necessary to go through the onshore power system, resulting in poor transmission efficiency.

[0008] Therefore, the main objective of this invention is to provide a means for efficiently transmitting energy resources such as electricity to any receiving device without relying on supply lines such as submarine power transmission cables.

[0009] [Technical means to solve the problem] The inventors of this invention have devoted themselves to researching methods for solving the problems of prior art, and as a result, have come to the following insight: by using ships to transport energy from supply equipment to receiving equipment at sea, various problems associated with energy transmission methods using power cables and the like can be solved. Furthermore, the inventors of this invention realized that the problems of prior art could be solved based on the above insight, and thus completed this invention. Specifically, this invention has the following structure or steps.

[0010] The first aspect of the present invention relates to an energy transmission system. The system of the present invention basically comprises: a transport vessel having means for maintaining energy resources; a supply device disposed outside the transport vessel to supply energy resources to the means for maintaining the transport vessel; and a receiving device disposed outside the transport vessel to receive the supply of energy resources from the means for maintaining the transport vessel.

[0011] In this invention, "energy resources" includes not only electricity but also energy resources that are interchangeable with electricity. For example, energy resources, besides electricity, may also include hydrogen, heat, potential energy, kinetic energy, etc., which are interchangeable with electricity and can maintain practical efficiency for a certain period. Furthermore, the energy resources supplied from the supply equipment to the transport ship and the energy resources supplied from the transport ship to the receiving equipment do not necessarily have to be the same type. For example, hydrogen can be supplied from the supply equipment to the transport ship, where electricity is generated from the hydrogen and then supplied from the transport ship to the receiving equipment. "Supply equipment" refers to equipment that can supply energy resources to the transport ship. For example, in the case where the energy resource is electricity, a transformer connected to a public power system and having the function of supplying electricity to the transport ship is equivalent to the supply equipment referred to here. "Receiving equipment" refers to equipment that can receive energy resources from the transport ship, including not only land-based facilities but also ships, vehicles, trains, or aircraft powered by energy resources supplied from the transport ship. For example, in cases where the energy resource is electricity, a transformer that receives the electricity from the transport vessel and transmits it to the public power system is equivalent to the receiving equipment mentioned here. Furthermore, the transport vessel can be a ship that receives energy resources from power generation equipment via cables, or a ship that supplies energy resources to the receiving equipment via cables. In this case, the transport vessel preferably further includes a robotic arm for suspending and holding the cables.

[0012] As described above, by using a transport vessel to transport energy from the supply equipment to the receiving equipment by sea, there are advantages such as the following.

[0013] First, according to the present invention, since it is not necessary to lay transmission cables between the supply equipment and the receiving equipment as in the past, the initial investment for starting power transmission between the equipment can be suppressed.

[0014] Furthermore, since this invention does not require submarine power transmission lines, the impact on the natural environment of the sea or seabed can be minimized.

[0015] Furthermore, since this invention uses a transport vessel to transport energy resources instead of power transmission cables, the recipient of the energy from the supply equipment can be freely selected. For example, energy resources can be directly transported to areas with high electricity demand, commercial facilities, hospitals, or public facilities.

[0016] Furthermore, since the energy resource retention means in this invention is installed on the transport ship, the timing of electricity sales can be selected to a certain extent. For example, by sailing the transport ship to areas with high electricity demand during peak electricity demand periods, the unit price of energy resources can be increased.

[0017] In the energy transmission system of this invention, the means of maintaining the transport vessel can be a storage battery (secondary battery). In this case, the electricity obtained from the power generation equipment is directly supplied to the transport vessel after being converted (voltage conversion and / or mutual conversion between DC and AC) as needed. "Storage battery" includes not only liquid batteries or all-solid-state batteries that convert electrical energy into chemical energy for storage, but also mechanical batteries such as flywheel batteries that convert electrical energy into physical energy such as rotational motion for storage. Compared to liquid batteries, mechanical batteries have fewer risks of fire or explosion because their energy storage method is not a chemical reaction, and they also have the advantage of a longer lifespan than ordinary lithium batteries.

[0018] In the energy transmission system of this invention, the means of holding the transport vessel can be a hydrogen tank. In this case, electricity obtained from a power generation device is used to generate hydrogen through a water electrolysis device or the like, and the resulting hydrogen is supplied to the hydrogen tank of the transport vessel. Furthermore, the hydrogen is supplied from the transport vessel to a receiving device, where it is used to generate electricity via a fuel cell or the like. Additionally, the water electrolysis device can be installed in the power generation device, the supply device, or the transport vessel. Furthermore, the fuel cell can be installed in the receiving device or the transport vessel.

[0019] The energy transmission system of this invention further includes a power generation device that supplies energy resources to a supply device. The transmission of electricity from the power generation device to the supply device is, for example, carried out through a conventional power system. The "power generation device" can be an apparatus that generates electricity using conventional methods such as wind power, solar power, tidal power, geothermal power, hydropower, biomass power, thermal power, and nuclear power. Furthermore, the power generation device includes various devices necessary for supplying energy resources to the transport vessel, such as a power generation unit, a transformer unit, a transmission unit, an energy storage unit, or an energy resource conversion device.

[0020] In the energy transmission system of this invention, the supply and receiving equipment can also be located on land, such as outlying islands or along the coast. For example, electricity generated by onshore power generation equipment is transmitted through the public power system to a supply equipment located on the coast, from which the supply equipment supplies electricity to a transport vessel. Then, the transport vessel transports the electricity by sea to a receiving vessel located on the coast. In this way, electricity can be transmitted from the onshore supply equipment to the receiving equipment via the transport vessel.

[0021] The second aspect of the present invention relates to an energy transmission method. In the transmission method of the present invention, an energy resource is transmitted from a supply device outside the transmission vessel to a receiving device outside the transmission vessel by means of a transmission vessel equipped with energy resource holding means. For example, the transmission method of the present invention includes: a step of supplying energy resources from the supply device to the transmission vessel; a step of transmitting energy resources by the transmission vessel; and a step of supplying energy resources from the transmission vessel to the receiving device.

[0022] [Invention Benefits] According to the present invention, energy resources such as electricity can be efficiently transmitted to any receiving device without the need for power transmission lines or other supply lines. Simple Explanation of the Diagram

[0023] Figure 1 illustrates the outline of the energy transmission system of the present invention by taking electricity transmission as an example. Figure 2 is a block diagram showing examples of the main components of a transport ship. Figure 3 schematically illustrates an example of a charging method from a land-based supply facility to a transport vessel. Figure 4(a) schematically illustrates an example of a discharge method from a transport ship to a receiving device on land. Figure 4(b) schematically illustrates an example of a discharge method from a transport ship to another ship. Figure 5 schematically illustrates an example of a method for unloading a containment container from a transport ship. Figure 6 shows an example of a power transmission scheme. Figure 7 is a block diagram illustrating an application example of an energy transmission system. In particular, Figure 7 shows a method of using a transport ship to transport hydrogen in place of electricity or in combination with it. Implementation

[0024] The embodiments of the present invention are described below using drawings. The present invention is not limited to the manner described below, and also includes appropriate modifications that can be made by those skilled in the art within the obvious scope.

[0025] Figure 1 illustrates the energy transmission system of the present invention and one embodiment of the energy transmission system. In the energy transmission system 100 of the embodiment shown in Figure 1, electricity is transmitted from coastal supply equipment 20 to other coastal receiving equipment 30 by means of a transport vessel 10 via sea route. First, the outline of the present invention will be described with reference to Figure 1.

[0026] As shown in Figure 1, power is transmitted from a public power system 200 to a supply facility 20 located along the coast. The supply facility 20 includes, for example, a transformer 21 and a transmission cable 22. In the supply facility 20, the transformer 21 is connected to the power system 200 via the transmission cable 22. The transformer 21, for example, converts the power received from the power system 200 from alternating current (AC) to direct current (DC). Furthermore, when the transport vessel 10 approaches the supply facility 20, the DC power is supplied from the transformer 21 to the battery (a means of maintaining energy resources) of the transport vessel 10 via a charging cable. Thus, supplying power to the transport vessel 10 is preferably carried out at sea via a cable. After the battery charging is completed, the transport vessel 10 sails towards a predetermined receiving facility 30. The receiving facility 30 includes, for example, a transformer 31 and a transmission cable 32. If the transport vessel 10 reaches the vicinity of the receiving equipment 30, the DC power maintained by the storage battery will be supplied to the power transformer 31 through the discharge cable. The power transformer 31 converts the DC power to AC power and transmits it to the public power system 200, which includes substations.

[0027] In this way, in this invention, electrical energy is basically transmitted from the land-based supply equipment 20 to other land-based receiving equipment 30, and then to the power system 200 (power grid), via a battery-equipped transport vessel 10. Although it depends on the power source of the transport vessel 10, even a motor-driven transport vessel 10 that uses electricity as its power source can travel at sea for about 300 to 500 km without recharging. Therefore, the distance from the supply equipment 20 to the receiving equipment 30 can be about 300 to 500 km.

[0028] Figure 2 shows the main components of the transport vessel 10. Specifically, in this embodiment, the transport vessel 10 is a motor-driven vessel that uses electricity as its power source. However, the transport vessel 10 can also be an internal combustion engine vessel that uses fossil fuels as its power source, or a hybrid vessel that combines a motor and an internal combustion engine. Furthermore, the transport vessel 10 can also use hydrogen as its power source. For example, in the case where hydrogen is used as a power source, the transport vessel 10 can be a fuel cell vessel that uses electricity generated by a fuel cell to drive a motor, or a hydrogen engine vessel that obtains power by burning hydrogen in an internal combustion engine.

[0029] As shown in Figure 2, the transport vessel 10 includes a container 10a and a hull 10b. The container 10a is configured to be loaded and unloaded relative to the hull 10b. Furthermore, the hull 10b is configured to navigate independently even when the container 10a has been removed.

[0030] The containment container 10a is an element used to store energy resources (specifically, electricity), which are then transported from the supply device 20 to the receiving device 30. Since the purpose of the electricity stored in the containment container 10a is to be transported from the supply device 20 to the receiving device 30, it is essentially not consumed during the transport period and remains unchanged as a power source for the transport vessel 10 or its internal machinery. However, as will be described later, in emergencies, the electricity stored in the containment container 10a can also be used as a power source for the transport vessel 10.

[0031] The housing 10a includes a charging / discharging port 11, multiple battery cells 12, and a battery control device 13. The charging / discharging port 11 is an interface for charging and discharging each battery cell 12, and a charging / discharging cable 40 (see Figure 3) can be inserted. Each battery cell 12 is a storage battery assembled within the housing 10a. The power capacity that the transport vessel 10 can store in the housing 10a can be adjusted according to the number of battery cells 12 assembled. For example, although it also depends on the size of the transport vessel 10, the housing 10a can ensure a power capacity of 200~6000MWh. The battery control device 13 is connected to each battery cell 12 and is a control circuit for controlling the charging / discharging amount or charging / discharging speed of the power supplied to each battery cell 12. The battery control device 13 has a CPU, memory storing the control program, a communication device for external servers, and sensors for detecting the charging status of the battery cells 12 mounted on its circuit board.

[0032] Furthermore, although in this embodiment the housing 10a is configured to be detachable from the hull 10b, it can also be further configured so that each battery pack 12 can be detachable from the housing 10a. On the other hand, in the case where each battery pack 12 can be detached from the housing 10a, the housing 10a itself can also be fixed to the hull 10b in a non-detachable manner. Moreover, although in this embodiment the battery control device 13 is mounted inside the housing 10a, it can also be mounted on the side of the hull 10b to replace this configuration.

[0033] The hull 10b of the transport vessel 10 has essentially the same configuration as a typical motor-driven ship that uses electricity as its power source. That is, the hull 10b includes a drive battery 14, a converter 15, and a motor 16. The drive battery 14 maintains and consumes electricity as a power source for the transport vessel 10 or its internal machinery. The converter 15 controls or converts the electricity output from the drive battery 14 to supply the motor 16. The motor 16 converts the electricity received from the converter 15 into power. For example, the motor 16 generates propulsion for the transport vessel 10 by rotating a propeller via a shaft (not shown).

[0034] Because the hull 10b has a drive battery 14 that is separate from the battery pack 12 used for storing and transporting electricity, it can navigate without consuming the electricity stored in the battery pack 12. However, in this embodiment, the drive battery 14 is electrically connected to the battery pack 12 via a battery control device 13. Therefore, in emergencies, the electricity stored in the battery pack 12 can be supplied to the drive battery 14. As a result, the transport vessel 10 can also navigate using the electricity stored in the battery pack 12 as a power source.

[0035] Furthermore, although the illustration is omitted, the transport vessel 10 can also be used to transport hydrogen instead of electricity as an energy resource. In this case, simply assembling a hydrogen tank in the containment tank 10a to replace the battery pack 12 is sufficient. Additionally, the transport vessel 10 can also be used to navigate using hydrogen as a power source. In this case, simply assembling a fuel cell in the hull 10b to replace the drive battery 14 is sufficient. Moreover, hydrogen can be transported using a transport vessel 10 powered by electricity, and electricity can also be transported using a transport vessel 10 powered by hydrogen.

[0036] Figure 3 schematically illustrates a method for supplying electricity from the supply equipment 20 along the coast to the battery pack 12 of the transport vessel 10. The power supply from the supply equipment 20 to the transport vessel 10 is primarily conducted via the charging / discharging cable 40 while the transport vessel 10 is at sea. When receiving power, the transport vessel 10 can anchor and moor near the supply equipment 20, or it can remain anchored and moor near the supply equipment 20 by controlling its motor or propeller. Furthermore, the charging / discharging cable 40 can be installed on either the transport vessel 10 or the supply equipment 20. The power supply from the supply equipment 20 to the transport vessel 10 is primarily intended to supply electricity (stored in the battery pack 12) as an energy resource to be transmitted to the receiving equipment 30. While it is possible to supply electricity (stored in the drive battery 14) from the supply equipment 20 to the transport vessel 10 as a power source for the transport vessel 10, this is ultimately not the primary purpose.

[0037] In the configuration shown in Figure 3, the transport vessel 10 is equipped with a robotic arm 50 for suspending and holding the charging / discharging cable 40. By holding the charging / discharging cable 40 with the robotic arm 50, charging can be performed on the transport vessel 10 without the charging / discharging cable 40 touching the sea surface.

[0038] Furthermore, the robotic arm 50 preferably has a stabilizer mechanism for maintaining the spatial position (horizontal and vertical) of the gripping part of the charging / discharging cable 40. The stabilizer mechanism can be a mechanical mechanism for maintaining the spatial position of the gripping part. Alternatively, the stabilizer mechanism can be an electronically controlled mechanism that maintains the spatial position of the gripping part based on detection information from sensors such as accelerometers and gyroscopes. Power supply to the transport vessel 10 occurs at sea and is easily affected by waves or currents. Therefore, by assembling the stabilizer mechanism onto the robotic arm 50 of the transport vessel 10, it is possible to prevent the charging / discharging cable 40 from accidentally detaching from the charging / discharging port, or to prevent the charging / discharging cable 40 from malfunctioning or breaking. Furthermore, although not illustrated, power can still be supplied from the supply device 20 to the transport vessel 10 even when the robotic arm 50 is not attached to the transport vessel 10 and the charging / discharging cable 40 is floating on the sea surface.

[0039] Figure 4(a) schematically illustrates the method of supplying power from the transport vessel 10 to the receiving equipment 30 on the coast. Preferably, the power supply from the transport vessel 10 to the receiving equipment 30 is carried out essentially while the transport vessel 10 is at sea via the charging / discharging cable 40. However, in the case of supplying power to the receiving equipment 30 on land, the transport vessel 10 can also be anchored in a port near the receiving equipment 30.

[0040] In the configuration shown in Figure 4(a), the land-based receiving device 30 includes a power transformer 31. Power stored in the battery pack 12 of the transport vessel 10 is supplied to the power transformer 31 via a charging / discharging cable 40 held by the robotic arm 50. Since the battery pack 12 stores direct current (DC) power, the power transformer 31 converts the DC power into alternating current (AC) power, which is then transmitted to the power system 200 via the transmission cable 32. Furthermore, although not shown in the figure, power can also be supplied from the transport vessel 10 to the power transformer 31 when the robotic arm 50 is not mounted on the transport vessel 10, but rather the charging / discharging cable 40 is floating on the sea surface.

[0041] In the example shown in Figure 4(b), electricity is supplied from the transport ship 10 to other vessels 34 at sea. The vessel 34 is, in an example, a motorized vessel that uses electricity as its power source. In this case, electricity can be supplied to the vessel 34 from the battery pack 12 installed on the transport ship 10, and the vessel 34 can charge its propulsion batteries at sea. Thus, the energy resources supplied from the transport ship 10 are not limited to the receiving equipment 30 on land, but can also be supplied to vessels 34 at sea that require energy resources such as electricity.

[0042] Furthermore, although the illustrations are omitted, the energy resources supplied from the transport vessel 10 can be delivered to various locations (receiving devices) such as land-based vehicles (EVs or FCVs), or directly to commercial facilities, hospitals, residences, or public transportation facilities. Thus, in this invention, the recipient of the energy resources from the transport vessel 10 can be freely selected.

[0043] Figure 5 illustrates a method for unloading and individually distributing storage containers 10a from the transport vessel 10. As mentioned earlier, the transport vessel 10 is configured to allow the storage containers 10a containing the battery pack 12 to be unloaded from the hull 10b. Therefore, for example, as shown in Figure 5, after the transport vessel 10 is docked in a port, the storage containers 10a can be unloaded from the hull 10b by a crane 310 and loaded onto a trailer 320. This allows for the individual distribution of large-capacity storage containers 10a to various regions or locations. For example, energy resources (electricity) can be freely distributed to areas without power lines, forests, or construction sites. Furthermore, the means of distributing storage containers 10a are not limited to trailers 320; other land-based transport methods such as trains, air transport methods such as helicopters or airplanes, or sea transport methods such as cargo ships can also be used. Additionally, the storage containers 10a can be unloaded at the port and stored intact as backup power.

[0044] Figure 6 illustrates the hypothetical power transmission scheme of this invention. Alternating current (AC) power generated by generator 60 is transmitted via power system 200 to supply equipment 20. In supply equipment 20, a transformer 21 converts the AC power into direct current (DC). The transformer 21 then converts the power into high-voltage DC power (HVDC) of approximately 200kV to 500kV. This high-voltage DC power is then supplied from transformer 21 to the transport vessel 10. Thus, by charging the battery pack 12 of the transport vessel 10 with the high-voltage DC power, power loss during transmission can be suppressed.

[0045] Furthermore, the power supply from the transport vessel 10 to the receiving equipment 30 is also carried out via high-voltage direct current (HVDC). Therefore, a high-voltage direct current collector 33 and a transformer 31 must be pre-installed on the receiving equipment 30 side. The power maintained by the battery pack 12 of the transport vessel 10 is supplied to the transformer 31 through the collector 33. The transformer 31 converts the HVDC power into AC power of approximately 100V~250V, which conforms to the standards of various regions, and then transmits it to the power system 200 through the transmission cable 32.

[0046] Next, referring to FIG7, an application example of the aforementioned embodiment of the present invention will be described. As shown in FIG7, the energy transmission system 100 of the present invention includes a power generation device 60. The power generation device 60 includes a power generation unit 61 and a transformer unit 62. As the power generation unit 61, a power generation method utilizing renewable energy sources such as a wind power generation unit 61a, a solar power generation unit 61b, a tidal power generation unit 61c, a geothermal power generation unit 61d, a hydropower generation unit 61e, or a biomass power generation unit 61f can be used. Furthermore, a thermal power generation unit or a nuclear power generation unit can also be used as the power generation unit 61. In the power generation device 60, one of these power generation units 61a to 61f can be used for power generation, or multiple types of power generation units can be combined for power generation. Furthermore, since each power generation unit is known, detailed descriptions of the configuration of each power generation unit are omitted. The electricity generated by the power generation unit 61 is supplied to the public power system 200 through the transformer unit 62.

[0047] Furthermore, in the aforementioned embodiment, electricity is used as the energy resource for transmission. That is, the supply equipment 20 supplies electricity obtained from the power system 200 to the transport vessel 10. The transport vessel 10 charges the battery pack 12 with electricity and transmits the electricity by sea. Therefore, in the transmission system shown at the top of FIG7, the supply equipment 20 converts the electricity from AC to DC by the power converter 21 to charge the battery pack 12 of the transport vessel 10, and the receiving equipment 30 converts the electricity supplied from the battery pack 12 from DC to AC by the power converter 31 to transmit the electricity to the power system 200.

[0048] On the other hand, in the application example of Figure 7, hydrogen can also be used as an energy resource for transportation. In this case, in the supply device 20, electricity obtained from the power system 200 is supplied to the water electrolysis device 23. The water electrolysis device 23 uses electricity to electrolyze water and generate high-purity hydrogen. The hydrogen generated by the water electrolysis device 23 is supplied to the transport vessel 10, which is moored or anchored at sea, through a hydrogen supply nozzle (supply line). The transport vessel 10 is equipped with a hydrogen tank 17, in which the hydrogen supplied from the water electrolysis device 23 is stored. Furthermore, the hydrogen supply line is preferably maintained by the robotic arm 50 of the transport vessel 10, similar to the example shown in Figure 3.

[0049] Once the hydrogen tank 17 is filled, the transport vessel 10 sails toward the receiving device 30. In cases where hydrogen is used as an energy resource for transport, the receiving device 30 is equipped with a fuel cell 35. Hydrogen is supplied from the hydrogen tank 17 of the transport vessel 10 to the fuel cell 35 through a supply nozzle (supply line). The fuel cell 35 generates electricity by chemically reacting the supplied hydrogen from the transport vessel 10 with oxygen in the air. The electricity generated by the fuel cell 35 is converted as needed and then transmitted to the power system 200. Thus, by transporting hydrogen via the transport vessel 10, the energy resources obtained at the supply device 20 can be delivered to the receiving device 30.

[0050] The energy transmission system 100 of the present invention may include either the electricity transmission system (upper part) or the hydrogen transmission system (lower part) shown in FIG. 7, or may include both of these transmission systems. That is, the transmission of electricity and the transmission of hydrogen can be selected and performed as needed.

[0051] In order to illustrate the content of this application, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above embodiments, and also includes modifications or improvements that are obvious to those skilled in the art based on the matters described in this application.

[0052] [Industry availability] This invention relates to an energy transmission system and a method for transmitting energy. For example, this invention is preferably applicable to power generation and power transmission projects.

[0053] 10: Transport ship 10a: Containment Box 10b: Hull 11: Charging / Discharging Port 12: Battery Pack 13: Battery control device 14: Drive battery 15: Converter 16: Motor 17: Hydrogen tank 20: Supply equipment 21: Transformer 22: Power transmission cable 23: Water electrolysis device 30: Receiving equipment 31: Transformer 32: Power transmission cable 33: Collector Panel 34: Ships 35: Fuel Cells 40: Charging / discharging cable 50: Robotic Arm 60: Power generation equipment 61: Power generation device 62: Transformer 100: Energy Transmission System 200: Power System 310: Crane 320: Tow truck

Claims

1. An energy delivery system comprising: a delivery vessel having a plurality of battery packs for storing and delivering electrical energy; a supply device disposed outside the delivery vessel for supplying the electrical energy to the battery packs; and a receiving device disposed outside the delivery vessel for receiving the supply of electrical energy from the battery packs, the delivery vessel having a hull and a detachable container relative to the hull, the container containing the battery packs, the hull including a drive battery and a motor, configured to navigate without consuming the electrical energy in the battery packs by supplying the electrical energy held in the drive battery to the motor, the battery packs being electrically connected to the drive battery, and the delivery vessel being configured to also supply the electrical energy in the battery packs to the drive battery.

2. As in the system of request item 1, wherein, It further includes power generation equipment that supplies the electrical energy to the supply equipment.

3. As in request item 1, where, The supply equipment and the receiving equipment are located on land.

4. As in request item 1, where, The transport vessel receives electrical energy from the power generation equipment via a cable, or supplies electrical energy to the receiving equipment via the cable, and the transport vessel further includes a robotic arm for suspending and holding the cable.

5. An energy transmission method comprising transmitting electrical energy from a supply device outside the transport vessel to a receiving device outside the transport vessel via a transport vessel equipped with a plurality of battery packs for storing and transmitting electrical energy, the transport vessel having a hull and a receiving container detachable relative to the hull, the receiving container containing the battery packs, the hull containing a drive battery and a motor, configured to navigate without consuming the electrical energy in the battery packs by supplying the electrical energy held by the drive battery to the motor, the battery packs being electrically connected to the drive battery, and the transport vessel being configured to also supply the electrical energy in the battery packs to the drive battery.

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