An electric ship in a battery-swapping mode and its hybrid power system and control method

Abstract

The present invention provides an electric ship in a power exchange mode and its hybrid power system and control method, which relate to the technical field of ship power exchange, wherein the ship comprises: a hull, a containerized battery and a containerized power generation device; a plurality of power exchange boxes are arranged on the deck of the hull, including a battery power exchange box and a general power exchange box; the battery power exchange box is used to install containerized batteries or ordinary containers; the general power exchange box is used to install containerized batteries or containerized power generation devices, or to install ordinary containers; the containerized battery is installed on the power exchange box for power supply to the hull; the containerized power generation device is installed on the general power exchange box for power supply to the hull and charging of the containerized battery; the containerized power generation device is a containerized AC power generation device or a containerized DC power generation device. The present application can flexibly switch power modes, and the hull, containerized battery and containerized power generation device are all produced in a standardized manner, and the shipbuilding cost is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of ship power exchange, and in particular to an electric ship in a power exchange mode, a hybrid power system and a control method thereof. Background Art

[0002] At present, inland river vessels are mostly fuel-powered, which has certain pollution problems. As the main source of domestic water for residents, the environmental protection issues of inland rivers have received great attention. Therefore, new energy ships driven by electricity have begun to be gradually promoted in water transportation operations due to their environmental advantages. However, although the existing electric ships have good environmental protection effects, they generally have problems in terms of endurance. In order to meet the requirements of cruising range, there are two main solutions: one is to increase the battery capacity; the other is to adopt a hybrid range extension solution.

[0003] There are three main modes for existing electric ships, namely charging mode, battery replacement mode and hybrid range-extending mode. The battery pack of an electric ship in charging mode is usually fixed in the cabin, and it needs to dock for charging when the battery power is insufficient. However, electric ships in charging mode generally have problems such as difficulty in docking, slow charging speed, and a small number of shore-side supporting charging piles. The battery of an electric ship in battery replacement mode usually adopts container batteries, which are installed on the box of the electric ship. When the battery power is insufficient, it is replaced by a fully charged container battery by hoisting. There is no need to dock for charging and the battery replacement speed is fast. However, a large number of container batteries need to be equipped on electric ships in battery replacement mode, and the one-time investment cost for batteries is very high. The electric ship in hybrid range-extending mode adds a generator set on the basis of the above two modes of electric ships, which can supplement the electric ship with electricity by burning liquid fuel, solving the problem of needing to dock for charging or replacing batteries to supplement electricity. Due to the high energy density of liquid fuel, electric ships in hybrid range-extending mode can reduce battery capacity while increasing cruising range. However, the operating costs of hybrid extended-range electric ships are higher than those of the above two types of ships.

[0004] Electric ships in charging mode or battery swapping mode usually have a shorter cruising range, which makes them suitable for missions with a shorter mileage, without or only requiring one or two dockings for charging or battery replacement, and with lower investment and operating costs. They are not suitable for missions with a longer mileage, which require multiple dockings for charging or battery replacement, and with higher investment and operating costs. Although electric ships in hybrid extended-range mode usually have a longer cruising range, their investment and operating costs are higher, so they are suitable for missions with a longer mileage, but not for missions with a shorter mileage. However, during normal operations, a ship owner usually needs to sail on routes with different mileages according to business needs, and the above three modes of electric ships cannot meet the mileage requirements and have lower investment and operating costs. At the same time, existing electric ships cannot flexibly switch power modes. Summary of the invention

[0005] The object of the present invention is to provide an electric ship in a battery swap mode and a hybrid power system and a control method thereof, so as to solve at least one of the above-mentioned technical problems existing in the prior art.

[0006] In a first aspect, in order to solve the above technical problems, the present invention provides an electric ship in a battery replacement mode, comprising: a hull, a containerized battery and a containerized power generation device;

[0007] A plurality of battery exchange box positions are arranged on the deck of the hull, including a battery exchange box position and a general battery exchange box position;

[0008] The battery exchange box position is used to install the container-type battery or ordinary container;

[0009] The universal battery exchange box is used to install the container-type battery or the container-type power generation device, or to install an ordinary container;

[0010] The container-type battery is detachably mounted on the battery replacement box and is used to power the hull;

[0011] The container-type power generation device is detachably mounted on the universal power exchange box position and is used for powering the hull and charging the container-type battery;

[0012] When in use, the containerized battery and the containerized power generation device are installed according to the cruising range requirements;

[0013] When sailing over short distances, the required number of containerized batteries are installed on the required number of battery exchange boxes by hoisting according to the mileage requirements. The power output mode of the electric ship in the battery exchange mode is a pure electric mode, and the containerized batteries are used to supply power to the ship body. At the same time, ordinary containers can be installed on the remaining battery exchange boxes to increase the cargo space.

[0014] During medium-distance navigation, the required number of containerized batteries are installed on several battery exchange boxes by hoisting according to the mileage requirements. After several battery exchange boxes are full, the remaining containerized batteries are installed on the general battery exchange boxes. The power output mode of the electric ship in the battery exchange mode is pure electric mode, and the containerized batteries are used to supply power to the hull. At the same time, ordinary containers can be installed on the remaining battery exchange boxes to increase the cargo space.

[0015] During long-distance sailing, several containerized batteries are installed on several battery exchange boxes by hoisting according to the range requirements, and several containerized power generation devices are installed on several universal battery exchange boxes by hoisting. The power output mode of the electric ship in the battery exchange mode is a hybrid extended-range mode, and the hull is powered by a hybrid power system composed of the containerized batteries and the containerized power generation devices.

[0016] By setting up a battery swap box on the deck of the hull, the present application can install or remove the required number of containerized batteries and containerized power generation devices on or from the battery swap box by hoisting according to the cruising range requirements, thereby achieving flexible switching of power modes; the hull and containerized batteries and containerized power generation devices are produced separately in a standardized manner, which reduces the complexity of ship berthing design and thereby reduces shipbuilding costs.

[0017] Furthermore, a power distribution box and a propulsion motor are provided in the cabin of the hull;

[0018] The distribution box is electrically connected to the containerized battery, the containerized power generation device, the propulsion motor and the electrical load of the hull, respectively, and is used for distributing electrical energy to the electric ship in the battery replacement mode;

[0019] The propulsion motor is used to drive the hull to sail.

[0020] Preferably, a propulsion motor controller is also provided in the cabin of the hull for controlling the operation of the propulsion motor.

[0021] Furthermore, the container-type battery is provided with a battery positive electrode interface and a battery negative electrode interface on the box body;

[0022] A DC pile is provided on one side of the battery exchange box, and the positive DC cable and the negative DC cable of the distribution box are led out through the DC pile. A positive DC plug and a negative DC plug are respectively provided at the leading ends of the positive DC cable and the negative DC cable, which are used to respectively connect with the positive electrode interface of the battery and the negative electrode interface of the battery through the positive DC plug and the negative DC plug, so that the distribution box is electrically connected to the container-type battery.

[0023] Optionally, the containerized power generation device is a containerized AC power generation device;

[0024] Of course, the containerized power generation device may also be a containerized DC power generation device.

[0025] Preferably, a three-phase AC output interface and a first three-phase AC input interface are provided on the box body of the containerized AC power generation device;

[0026] An AC charging pile is arranged on the other side of the universal battery exchange box, and the three-phase AC input cable and the three-phase AC output cable of the distribution box are led out through the AC charging pile. The leading ends of the three-phase AC input cable and the three-phase AC output cable are respectively provided with a three-phase AC input plug and a three-phase AC output plug, which are used to respectively connect with the three-phase AC output interface and the first three-phase AC input interface through the three-phase AC input plug and the three-phase AC output plug, so that the distribution box is electrically connected to the container-type AC power generation device.

[0027] Preferably, a positive DC interface and a negative DC interface are provided on one side of the box body of the containerized DC power generation device, and a second three-phase AC input interface is provided on the other side, which is used to be plugged into the positive DC interface and the negative DC interface through the positive DC plug and the negative DC plug respectively, and the three-phase AC output plug is plugged into the second three-phase AC input interface, so that the distribution box is electrically connected to the containerized DC power generation device.

[0028] Further, the distribution box includes: a first AC distribution box, a DC distribution box and a second AC distribution box;

[0029] The first AC distribution box, the DC distribution box and the second AC distribution box are electrically connected in sequence;

[0030] The propulsion motor is electrically connected to the DC distribution box;

[0031] The positive DC cable and the negative DC cable are led out from the DC distribution box;

[0032] The three-phase AC input cable is led out from the first AC distribution box;

[0033] The three-phase AC output cable is led out from the second AC distribution box.

[0034] Furthermore, the hull is provided with an Energy Management System (EMS system) for information interaction and linkage control between the hull and the containerized battery, the containerized power generation device, the propulsion motor and the electrical load of the hull.

[0035] Furthermore, a battery management system and a high-voltage distribution box are provided in the box of the containerized battery;

[0036] The battery management system is used to control the operation of the containerized battery;

[0037] The high-voltage distribution box is electrically connected to the battery positive electrode interface and the battery negative electrode interface, and is used for power distribution of the container-type battery.

[0038] Furthermore, the containerized battery is also provided with a battery display screen and a battery communication interface;

[0039] The battery display screen is electrically connected to the battery management system and is used to display basic information and working status of the containerized battery and manually control the operation of the containerized battery;

[0040] The battery communication interface is electrically connected to the battery management system;

[0041] The first RS485 bus of the power management system is led out through the DC power pile or the AC power pile, and a communication plug is provided at one end of the first RS485 bus for plugging into the battery communication interface through the communication plug, so that the power management system is electrically connected to the battery management system of the container-type battery.

[0042] Preferably, the containerized battery is usually also provided with a ventilation system, a fire detection system, a comprehensive alarm display system, etc.

[0043] Furthermore, the container-type power generation device is provided with a fuel tank, a fuel supply system, a generator set, a power distribution board of the power generation device and a controller of the power generation device;

[0044] The fuel tank, the fuel supply system and the generator set are connected in sequence; the fuel tank is used to store the fuel of the generator set; the fuel supply system is used to transport the fuel; the generator set is used to generate electricity;

[0045] The power distribution board of the power generation device is electrically connected to the generator set and the load in the containerized power generation device, and is used for power distribution of the containerized power generation device;

[0046] The power generation device controller is used to control the operation of the containerized power generation device;

[0047] The power generation device controller usually adopts a programmable logic controller (PLC), and the fuel supply system, the generator set and the power distribution board of the power generation device are controlled in a linkage manner by the programmable logic controller.

[0048] Preferably, the generator set of the containerized AC power generation device is an AC generator set;

[0049] The power distribution board of the containerized AC power generation device is a third AC power distribution board, which is electrically connected to the AC generator set and the load in the containerized AC power generation device and is used for power distribution of the containerized AC power generation device;

[0050] The third AC distribution board is electrically connected to the three-phase AC output interface and the first three-phase AC input interface.

[0051] Preferably, the generator set of the containerized DC power generation device is a DC generator set;

[0052] The power distribution board of the containerized DC power generation device comprises a third DC distribution board and a fourth AC distribution board, wherein the third DC distribution board is electrically connected to the DC generator set and the DC load in the containerized DC power generation device, and the fourth AC distribution board is electrically connected to the AC load in the containerized DC power generation device, and is used for power distribution of the containerized DC power generation device;

[0053] The third DC distribution board is electrically connected to the positive DC interface and the negative DC interface;

[0054] The fourth AC distribution board is electrically connected to the second three-phase AC input interface.

[0055] Furthermore, the container-type power generation device is also provided with a power generation device display screen and a power generation device communication interface on the box body;

[0056] The power generation device display screen is electrically connected to the power generation device controller and is used to display basic information and working status of the containerized power generation device and manually control the operation of the containerized power generation device;

[0057] The power generation device communication interface is electrically connected to the power generation device controller;

[0058] The first RS485 bus is plugged into the communication interface of the power generation device through the communication plug, so that the power management system is electrically connected to the power generation device controller of the container-type power generation device.

[0059] Furthermore, a propeller is provided at the tail of the hull, and the propeller is electrically connected to the propulsion motor so as to drive the propeller to rotate through the propulsion motor, thereby driving the hull to sail using the propulsion force of the propeller.

[0060] Furthermore, a common container space is also provided on the deck of the hull for installing common containers.

[0061] In a second aspect, based on the same inventive concept, the present invention also provides a hybrid power system for an electric ship in a battery swap mode as described above, comprising: the containerized battery, the containerized power generation device, a first AC distribution board, a DC distribution board, a second AC distribution board and two propulsion motors;

[0062] The containerized power generation device is a containerized AC power generation device or a containerized DC power generation device;

[0063] The third AC distribution board of the containerized AC power generation device is provided with an AC400V three-phase AC busbar, an AC220V single-phase AC busbar, an isolation transformer T4 and an isolation transformer T5;

[0064] The first branch line of the AC400V three-phase AC busbar is electrically connected to the three phase lines of the AC generator set G of the containerized AC generator device through the circuit breaker K21;

[0065] The second branch line of the AC400V three-phase AC busbar is electrically connected to the three-phase AC output interface of the containerized AC generator through the circuit breaker K28, and is used for the power output of the AC generator set G;

[0066] The third branch line of the AC400V three-phase AC busbar is electrically connected to the output end of the isolation transformer T5 through the circuit breaker K22, and the input end of the isolation transformer T5 is electrically connected to the first three-phase AC input interface of the containerized AC generator, so as to supply power to the load in the containerized AC generator;

[0067] The fourth branch line of the AC400V three-phase AC busbar is electrically connected to the input end of the isolation transformer T4 through the circuit breaker K24, and the output end of the isolation transformer T4 is electrically connected to the AC220V single-phase AC busbar through the circuit breaker K25;

[0068] The AC400V three-phase AC busbar and the AC220V single-phase AC busbar are used to supply power to the loads in the containerized AC power generation device;

[0069] The first AC distribution board, the DC distribution board and the second AC distribution board are arranged in a distribution box of the hull;

[0070] The two propulsion motors are respectively a left propulsion motor M1 and a right propulsion motor M2.

[0071] Preferably, the first AC distribution board, the DC distribution board and the second AC distribution board are respectively arranged in the first AC distribution box, the DC distribution box and the second AC distribution box.

[0072] Furthermore, the first AC distribution board is provided with an AC400V_IN AC bus and a plurality of AFE inverters;

[0073] The AC400V_IN AC busbar leads to a plurality of input branches, the input branches are electrically connected to the first three-phase AC output interface through a first circuit breaker, and a plurality of the container-type AC power generation devices are connected in parallel to the AC400V_IN AC busbar;

[0074] The AC400V_IN AC busbar also leads to a plurality of output branches, which are electrically connected to the input end of the AFE inverter through a second circuit breaker, and the output end of the AFE inverter is electrically connected to the DC distribution board.

[0075] Preferably, the number of the input branches, the output branches and the AFE inverters are equal to the number of the universal power-changing box positions.

[0076] Furthermore, the DC distribution board is provided with a DC_BUS1 DC bus, a DC_BUS2 DC bus, a plurality of DCC bidirectional inverters and four DAC inverters;

[0077] The DC_BUS1 DC bus is connected in parallel with the DC_BUS2 DC bus through the fuse F9 and the circuit breaker K11 to form a DC1000V DC bus;

[0078] The DC_BUS1 direct current bus leads to a plurality of first input branches, and the first input branches are electrically connected to the output end of the AFE inverter through a first fuse;

[0079] The DC_BUS2 direct current bus leads to a plurality of second input branches, the second input branches are electrically connected to one end of the DCC bidirectional inverter through a second fuse, and the other end of the DCC bidirectional inverter is electrically connected to the battery positive electrode interface and the battery negative electrode interface of the containerized battery through a third circuit breaker, and is used for the power output and charging of the containerized battery. When the output power of the containerized power generation device is greater than the power consumption of the electric ship in the battery replacement mode, the excess power of the containerized power generation device is used to charge the containerized battery through the DCC bidirectional inverter;

[0080] The DC_BUS1 direct current bus leads out a first output branch which is electrically connected to the input end of the DAC inverter DAC1 through a fuse F6, and the output end of the DAC inverter DAC1 is electrically connected to the left propulsion motor M1 through a circuit breaker K8, so as to supply power to the left propulsion motor M1;

[0081] The DC_BUS2 direct current bus leads out a second output branch which is electrically connected to the input end of the DAC inverter DAC2 through the fuse F7, and the output end of the DAC inverter DAC2 is electrically connected to the right propulsion motor M2 through the circuit breaker K9, so as to supply power to the right propulsion motor M2;

[0082] The DC_BUS1 direct current bus leads out a third output branch which is electrically connected to the input end of the DAC inverter DAC3 through a fuse F5, and the output end of the DAC inverter DAC3 is electrically connected to the second AC distribution board through a circuit breaker K7;

[0083] The fourth output branch line led out from the DC_BUS2 direct current bus is electrically connected to the input end of the DAC inverter DAC4 through the fuse F8, and the output end of the DAC inverter DAC4 is electrically connected to the second AC distribution board through the circuit breaker K10.

[0084] Preferably, a plurality of the second input branches and the DCC bidirectional inverters are redundantly arranged.

[0085] Preferably, the number of the second input branches and the DCC bidirectional inverters is equal to the number of the power exchange box positions.

[0086] Furthermore, the second AC distribution board is provided with an AC400V_OUT1 AC bus, an AC400V_OUT2 AC bus, an AC220V_OUT AC bus, an isolation transformer T1, an isolation transformer T2 and an isolation transformer T3;

[0087] The AC400V_OUT1 AC bus is electrically connected to the AC400V_OUT2 AC bus through a circuit breaker K14 to form an AC400V_OUT AC bus;

[0088] The AC400V_OUT1 AC bus leads to a third input branch line, the third input branch line is electrically connected to the output end of the isolation transformer T1, and the input end of the isolation transformer T1 is electrically connected to the third output branch line;

[0089] The AC400V_OUT2 AC bus leads to a fourth input branch, the fourth input branch is electrically connected to the output end of the isolation transformer T2, and the input end of the isolation transformer T2 is electrically connected to the fourth output branch;

[0090] The AC400V_OUT2 AC busbar leads to a plurality of fifth input branches, and the fifth input branches are electrically connected to the first three-phase AC input interface or the second three-phase AC input interface of the containerized DC power generation device through a fourth circuit breaker, and are used to supply power to the containerized power generation device;

[0091] The AC400V_OUT2 AC bus leads out a fifth branch line, and the fifth branch line is electrically connected to the input end of the isolation transformer T3 through a circuit breaker K12, and the output end of the isolation transformer T3 is electrically connected to the AC220V_OUT AC bus through a circuit breaker K13.

[0092] The hybrid power system of the electric ship in the battery exchange mode further includes an electric energy management system, wherein the electric energy management system is electrically connected to two groups of RS485 buses, namely a first RS485 bus and a second RS485 bus;

[0093] The first RS485 bus is electrically connected to the battery management system, the power generation device controller, the propulsion motor controller of the left propulsion motor, and the propulsion motor controller of the right propulsion motor, respectively, so that the power management system can exchange information with the battery management system, the power generation device controller, the propulsion motor controller of the left propulsion motor, and the propulsion motor controller of the right propulsion motor through the first RS485 bus, and issue control instructions;

[0094] The second RS485 bus is electrically connected to the instruments of the hull, the DC insulation tester and the DCC bidirectional inverter, respectively, and is used for the power management system to exchange information with the instruments of the hull, the DC insulation tester and the DCC bidirectional inverter through the second RS485 bus, and to issue control instructions; the second RS485 bus is also electrically connected to the AFE inverter, and is used for the power management system to exchange information with the AFE inverter through the second RS485 bus, and to issue control instructions.

[0095] By adopting the above technical solution, the present invention has the following beneficial effects:

[0096] The present invention provides an electric ship with a battery swap mode, a hybrid power system and a control method thereof. By arranging a battery swap box on the deck of the hull, a required number of containerized batteries and containerized power generation devices can be installed on or removed from the battery swap box by hoisting according to the cruising range requirements, thereby realizing flexible switching of power modes; the hull and the containerized batteries and containerized power generation devices are separately produced in a standardized manner, which reduces the complexity of the ship berthing design and thereby reduces the shipbuilding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0098] Figure 1 A front view of an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0099] Figure 2 for Figure 1 A top view of an electric ship in a battery swapping mode is shown;

[0100] Figure 3 A front view of a containerized AC power generation device for an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0101] Figure 4 A front view of a containerized battery for an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0102] Figure 5 A front view of a containerized DC power generation device for an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0103] Figure 6 A rear view of a containerized DC power generation device of an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0104] Figure 7 A hybrid power system diagram of an electric ship in a battery swap mode provided by an embodiment of the present invention;

[0105] Figure 8 A circuit diagram of a third AC distribution board of a containerized AC power generation device of an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0106] Fig. 9A circuit diagram of a third DC distribution board and a fourth AC distribution board of a containerized DC power generation device of an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0107] Fig.10 A connection relationship diagram of an electric energy management system EMS of an electric ship in a battery replacement mode provided by an embodiment of the present invention;

[0108] Fig.11 A flow chart of a control method for an electric ship in a battery swapping mode provided by an embodiment of the present invention;

[0109] Fig.12 A flow chart of a manual control method for an electric ship in a battery swapping mode provided in an embodiment of the present invention.

[0110] Reference numerals:

[0111] 2: Containerized AC generator; 2-1: Three-phase AC output interface; 2-2: First three-phase AC input interface; 2-3: AC generator communication interface; 2-4: AC generator display screen; 3: Containerized battery; 3-1: Battery positive electrode interface; 3-2: Battery negative electrode interface; 3-3: Battery communication interface; 3-4: Battery display screen; 4-1: DC distribution box; 4-2: First AC distribution box; 4-3: Second AC distribution box; 4-4: Battery exchange box position; 4-5: Ordinary box position; 4-6: Battery exchange box position; 4-7: General battery exchange box position; 5: Containerized DC generator; 5-1: Positive DC interface; 5-2: Negative DC interface; 5-3: Second three-phase AC input interface; 5-4: DC generator communication interface; 5-5: DC generator display screen. DETAILED DESCRIPTION

[0112] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0113] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0114] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] The present invention is further explained below in conjunction with specific implementation modes.

[0116] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be used in combination or in association with each other.

[0117] Example 1

[0118] like Figure 1-4 As shown, an electric ship with a battery-swapping mode provided in this embodiment includes: a hull, a containerized battery 3 and a containerized power generation device; a plurality of battery-swapping box positions 4-4 are arranged on the deck of the hull, including a battery-swapping box position 4-6 and a general-purpose battery-swapping box position 4-7; the battery-swapping box position 4-6 is used to install the containerized battery 3 or an ordinary container; the general-purpose battery-swapping box position 4-7 is used to install the containerized battery 3 or the containerized power generation device, or to install an ordinary container; the containerized battery 3 is detachably mounted on the battery-swapping box position 4-4 for powering the hull; the containerized power generation device is detachably mounted on the general-purpose battery-swapping box position 4-7 for powering the hull and charging the containerized battery 3;

[0119] When in use, the containerized battery 3 and the containerized power generation device are installed according to the range requirement; when sailing over short distances, the required number of containerized batteries 3 are installed on the required number of battery swapping boxes 4-6 by hoisting according to the range requirement, the power output mode of the electric ship in the battery swapping mode is a pure electric mode, and the containerized battery 3 supplies power to the hull, and at the same time, ordinary containers can be installed on the remaining battery swapping boxes 4-4 to increase the cargo space; when sailing over medium distances, the required number of containerized batteries 3 are installed on several battery swapping boxes 4-4 by hoisting according to the range requirement, and after several battery swapping boxes 4-6 are filled, the remaining containerized batteries are The battery 3 is installed on the universal battery exchange box position 4-7, and the power output mode of the electric ship in the battery exchange mode is a pure electric mode, and the power supply to the hull is provided by the containerized battery 3. At the same time, the cargo space can be increased by installing ordinary containers on the remaining battery exchange box positions 4-4; when sailing over long distances, according to the cruising range requirements, several of the containerized batteries 3 are installed on several of the battery exchange box positions 4-6 by hoisting, and several of the containerized power generation devices are installed on several of the universal battery exchange box positions 4-7 by hoisting. The power output mode of the electric ship in the battery exchange mode is a hybrid extended-range mode, and the power supply to the hull is provided by a hybrid power system composed of the containerized battery 3 and the containerized power generation device.

[0120] By setting up a battery swap box position 4-4 on the deck of the hull, the present application can install the required number of containerized batteries 3 and containerized power generation devices on or remove them from the battery swap box position 4-4 by hoisting according to the cruising range requirements, thereby realizing flexible switching of power modes; the hull and the containerized batteries 3 and containerized power generation devices are separately produced in a standardized manner, which reduces the complexity of the ship berthing design and thereby reduces the shipbuilding cost.

[0121] On the basis of the above technical solution, it is further preferred that a distribution box and a propulsion motor are arranged in the cabin of the hull; the distribution box is electrically connected to the containerized battery 3, the containerized power generation device, the propulsion motor and the electrical load of the hull respectively, and is used for the distribution of electric energy of the electric ship in the battery replacement mode; the propulsion motor is used to drive the hull to sail. More preferably, a propulsion motor controller is also arranged in the cabin of the hull, which is used to control the operation of the propulsion motor.

[0122] Furthermore, a battery positive interface 3-1 and a battery negative interface 3-2 are provided on the box body of the container-type battery 3; a DC pile is provided on one side of the battery exchange box position 4-4, and the positive DC cable and the negative DC cable of the distribution box are led out through the DC pile, and the lead-out ends of the positive DC cable and the negative DC cable are respectively provided with a positive DC plug and a negative DC plug, which are used to respectively connect with the battery positive interface 3-1 and the battery negative interface 3-2 through the positive DC plug and the negative DC plug, so that the distribution box is electrically connected to the container-type battery 3.

[0123] In this embodiment, the container-type power generation device is a container-type AC power generation device 2; a three-phase AC output interface 2-1 and a first three-phase AC input interface 2-2 are arranged on the box body of the container-type AC power generation device 2; an AC pile is arranged on the other side of the universal power exchange box position 4-7, and the three-phase AC input cable and the three-phase AC output cable of the distribution box are led out through the AC pile, and the lead-out ends of the three-phase AC input cable and the three-phase AC output cable are respectively provided with a three-phase AC input plug and a three-phase AC output plug, which are used to be respectively connected with the three-phase AC output interface 2-1 and the first three-phase AC input interface 2-2 through the three-phase AC input plug and the three-phase AC output plug, so that the distribution box is electrically connected to the container-type AC power generation device 2.

[0124] Further, the distribution box includes: a first AC distribution box 4-2, a DC distribution box 4-1 and a second AC distribution box 4-3; the first AC distribution box 4-2, the DC distribution box 4-1 and the second AC distribution box 4-3 are electrically connected in sequence; the propulsion motor is electrically connected to the DC distribution box 4-1; the positive DC cable and the negative DC cable are led out from the DC distribution box 4-1; the three-phase AC input cable is led out from the first AC distribution box 4-2; the three-phase AC output cable is led out from the second AC distribution box 4-3. More preferably, the hull is provided with an Energy Management System (EMS system) for information interaction and linkage control between the hull and the containerized battery 3, the containerized power generation device, the propulsion motor and the electrical load of the hull.

[0125] Furthermore, a battery management system and a high-voltage distribution box are provided in the box of the containerized battery 3; the battery management system is used to control the operation of the containerized battery 3; the high-voltage distribution box is electrically connected to the battery positive electrode interface 3-1 and the battery negative electrode interface 3-2, and is used for the electrical energy distribution of the containerized battery 3.

[0126] Furthermore, a battery display screen 3-4 and a battery communication interface 3-3 are also provided on the box of the container battery 3; the battery display screen 3-4 is electrically connected to the battery management system, and is used to display the basic information and working status of the container battery 3, and manually control the operation of the container battery 3; the battery communication interface 3-3 is electrically connected to the battery management system; the first RS485 bus of the power management system is led out through the DC power pile or the AC power pile, and a communication plug is provided at one end of the first RS485 bus, which is used to be plugged into the battery communication interface 3-3 through the communication plug, so that the power management system is electrically connected to the battery management system of the container battery 3.

[0127] More preferably, the container-type battery 3 is usually also provided with a ventilation system, a fire detection system, a comprehensive alarm display system, etc.

[0128] Furthermore, a fuel tank, a fuel supply system, a generator set, a generator distribution board and a generator controller are arranged in the box of the containerized power generation device; the fuel tank, the fuel supply system and the generator set are connected in sequence; the fuel tank is used to store the fuel of the generator set, and the fuel can be a liquid clean fuel such as methanol, or a gas clean fuel such as hydrogen or ammonia; the fuel supply system is used to transport the fuel; the generator set is used to generate electricity; the generator distribution board is electrically connected to the generator set and the load in the containerized power generation device, and is used for the power distribution of the containerized power generation device; the generator controller is used to control the operation of the containerized power generation device; the generator controller usually adopts a programmable logic controller (PLC), and the fuel supply system, the generator set and the generator distribution board are controlled by the programmable logic controller.

[0129] In this embodiment, the generator set of the containerized AC power generation device 2 is an AC generator set; the generator distribution board of the containerized AC power generation device 2 is a third AC distribution board, and the third AC distribution board is electrically connected to the AC generator set and the load in the containerized AC power generation device 2, and is used for power distribution of the containerized AC power generation device 2; the third AC distribution board is electrically connected to the three-phase AC output interface 2-1 and the first three-phase AC input interface 2-2.

[0130] More preferably, the box body of the containerized power generation device is also provided with a power generation device display screen and a power generation device communication interface; the power generation device display screen is electrically connected to the power generation device controller, and is used to display the basic information and working status of the containerized power generation device, and manually control the operation of the containerized power generation device; the power generation device communication interface is electrically connected to the power generation device controller; the first RS485 bus is plugged into the power generation device communication interface through the communication plug, so that the power management system is electrically connected to the power generation device controller of the containerized power generation device. In this embodiment, the box body of the containerized AC power generation device 2 is provided with an AC power generation device display screen 2-4 and an AC power generation device communication interface 2-3.

[0131] Furthermore, a propeller is provided at the tail of the hull, and the propeller is electrically connected to the propulsion motor so as to drive the propeller to rotate through the propulsion motor, thereby driving the hull to sail using the propulsion force of the propeller.

[0132] More preferably, the deck of the ship is also provided with common container spaces 4-5 for installing common containers. In this embodiment, the containerized battery 3, the containerized power generation device and the common container are all standard 40-foot container cabinets.

[0133] Reference Fig.12 As shown, in this embodiment, a first switch and a second switch are provided in the cockpit of the hull for manual switching control of the power output mode of the electric ship in the battery replacement mode, and the manual switching control has a higher priority than the automatic control of the power management system;

[0134] When the first switching switch is turned on and the second switching switch is turned off, the power output mode of the electric ship in the battery swap mode is switched to the pure electric mode; when the first switching switch is turned on and the second switching switch is turned on, the power output mode of the electric ship in the battery swap mode is switched to the hybrid extended-range mode; when the first switching switch is turned off and the second switching switch is turned on, the power output mode of the electric ship in the battery swap mode is switched to the extended-range charging mode; the extended-range charging mode can charge the containerized battery 3 through the containerized power generation device; when the electric ship in the battery swap mode docks, the containerized battery 3 is usually used to provide living electricity to the hull. When the power of the containerized battery 3 is less than 30% and there is no charging equipment on the shore, the power output mode is switched to the extended-range charging mode, and the containerized battery 3 is charged through the containerized power generation device.

[0135] By arranging a battery exchange box position 4-4 on the deck of the hull, the present invention can install or remove the required number of containerized batteries 3 and containerized power generation devices on or from the battery exchange box position 4-4 by hoisting according to the cruising range requirements, thereby realizing flexible switching of power modes; the hull and the containerized batteries 3 and the containerized power generation devices are separately produced in a standardized manner, which reduces the complexity of the ship berthing design and thereby reduces the shipbuilding cost.

[0136] Example 2

[0137] This embodiment is basically the same as Embodiment 1, except that:

[0138] like Figure 5-6 As shown, this embodiment provides an electric ship with a battery replacement mode, wherein the container power generation device is a container DC power generation device, and a positive DC interface 5-1 and a negative DC interface 5-2 are provided on one side of the box body of the containerized DC power generation device 5, and a second three-phase AC input interface 5-3 is provided on the other side, which is used to be plugged into the positive DC interface 5-1 and the negative DC interface 5-2 respectively through the positive DC plug and the negative DC plug, and the three-phase AC output plug is plugged into the second three-phase AC input interface 5-3, so that the distribution box is electrically connected to the containerized DC power generation device 5.

[0139] More preferably, the generator set of the containerized DC power generation device 5 is a DC generator set; the generator distribution board of the containerized DC power generation device 5 includes a third DC distribution board and a fourth AC distribution board, the third DC distribution board is electrically connected to the DC generator set and the DC load in the containerized DC power generation device, the fourth AC distribution board is electrically connected to the AC load in the containerized DC power generation device, and is used for the electric energy distribution of the containerized DC power generation device 5; the third DC distribution board is electrically connected to the positive DC interface 5-1 and the negative DC interface 5-2; the fourth AC distribution board is electrically connected to the second three-phase AC input interface 5-3.

[0140] Furthermore, a DC power generation device display screen 5-5 and a DC power generation device communication interface 5-4 are also provided on the box body of the containerized DC power generation device 5.

[0141] Example 3

[0142] like Figure 7-8 and Fig.10As shown, the present embodiment provides a hybrid power system of an electric ship in a battery exchange mode as described above, comprising: the containerized battery, the containerized power generation device, a first AC distribution board, a DC distribution board, a second AC distribution board and two propulsion motors; the containerized power generation device is a containerized AC power generation device or a containerized DC power generation device; an AC400V three-phase AC bus, an AC220V single-phase AC bus, an isolation transformer T4 and an isolation transformer T5 are arranged on the third AC distribution board of the containerized AC power generation device; the AC400V three-phase AC bus leads out a first branch line which is electrically connected to the three phase lines of the AC generator set G of the containerized AC power generation device through a circuit breaker K21; the AC400V three-phase AC bus leads out a second branch line which is electrically connected to the three-phase AC output interface 2-1 of the containerized AC power generation device through a circuit breaker K28, and is used for the power output of the AC generator set G ; The third branch line led out from the AC400V three-phase AC bus is electrically connected to the output end of the isolation transformer T5 through the circuit breaker K22, and the input end of the isolation transformer T5 is electrically connected to the first three-phase AC input interface 2-2 of the containerized AC power generation device, which is used to supply power to the load in the containerized AC power generation device; the fourth branch line led out from the AC400V three-phase AC bus is electrically connected to the input end of the isolation transformer T4 through the circuit breaker K24, and the output end of the isolation transformer T4 is electrically connected to the AC220V single-phase AC bus through the circuit breaker K25; the AC400V three-phase AC bus and the AC220V single-phase AC bus are used to supply power to the load in the containerized AC power generation device; the first AC distribution board, the DC distribution board and the second AC distribution board are arranged in the distribution box of the hull; the two propulsion motors are respectively the left propulsion motor M1 and the right propulsion motor M2.

[0143] More preferably, the first AC distribution board, the DC distribution board and the second AC distribution board are respectively arranged in the first AC distribution box, the DC distribution box and the second AC distribution box.

[0144] Furthermore, the first AC distribution board is provided with an AC400V_IN AC bus and a plurality of AFE inverters; the AC400V_IN AC bus leads to a plurality of input branches, the input branches are electrically connected to the first three-phase AC output interface 2-1 through a first circuit breaker, and a plurality of the container-type AC power generation devices are connected in parallel to the AC400V_IN AC bus; Figure 6As shown, the circuit breaker K1 and the circuit breaker K2 are both the first circuit breakers; the AC400V_IN AC bus also leads to a plurality of output branches, the output branches are electrically connected to the input end of the AFE inverter through the second circuit breaker, and the output end of the AFE inverter is electrically connected to the DC distribution board; refer to Figure 6 As shown, the circuit breaker K3 and the circuit breaker K4 are both the second circuit breakers. More preferably, the number of the input branch lines, the output branch lines and the AFE inverters are equal to the number of the universal power exchange box positions.

[0145] Furthermore, the DC distribution board is provided with a DC_BUS1 DC bus, a DC_BUS2 DC bus, a plurality of DCC bidirectional inverters and four DAC inverters; the DC_BUS1 DC bus is connected in parallel with the DC_BUS2 DC bus through a fuse F9 and a circuit breaker K11 to form a DC1000V DC bus; the DC_BUS1 DC bus leads to a plurality of first input branches, and the first input branch is electrically connected to the output end of the AFE inverter through a first fuse; refer to Figure 6 As shown, fuse F1 and fuse F2 are both the first fuses; the DC_BUS2 direct current bus leads out a plurality of second input branches, the second input branches are electrically connected to one end of the DCC bidirectional inverter through the second fuse, and the other end of the DCC bidirectional inverter is electrically connected to the battery positive electrode interface and the battery negative electrode interface of the containerized battery through the third circuit breaker, which is used for the power output and charging of the containerized battery. When the output power of the containerized power generation device is greater than the power consumption of the electric ship in the battery replacement mode, the excess power of the containerized power generation device is charged to the containerized battery through the DCC bidirectional inverter; refer to Figure 6As shown, the circuit breakers K5 and K6 are both the third circuit breakers, and the fuses F3 and F4 are both the second fuses; the DC_BUS1 direct current bus leads out a first output branch line which is electrically connected to the input end of the DAC inverter DAC1 through the fuse F6, and the output end of the DAC inverter DAC1 is electrically connected to the left propulsion motor M1 through the circuit breaker K8, so as to supply power to the left propulsion motor M1; the DC_BUS2 direct current bus leads out a second output branch line which is electrically connected to the input end of the DAC inverter DAC2 through the fuse F7, and the output end of the DAC inverter DAC2 is electrically connected to the left propulsion motor M1 through the circuit breaker K8, so as to supply power to the left propulsion motor M1; The end is electrically connected to the right propulsion motor M2 through the circuit breaker K9, which is used to supply power to the right propulsion motor M2; the DC_BUS1 direct current bus leads to a third output branch line which is electrically connected to the input end of the DAC inverter DAC3 through the fuse F5, and the output end of the DAC inverter DAC3 is electrically connected to the second AC distribution board through the circuit breaker K7; the DC_BUS2 direct current bus leads to a fourth output branch line which is electrically connected to the input end of the DAC inverter DAC4 through the fuse F8, and the output end of the DAC inverter DAC4 is electrically connected to the second AC distribution board through the circuit breaker K10. More preferably, a plurality of the second input branches and the DCC bidirectional inverters are redundantly arranged. The number of the second input branches and the DCC bidirectional inverters is equal to the number of the power exchange box positions.

[0146] Furthermore, the second AC distribution board is provided with an AC400V_OUT1 AC bus, an AC400V_OUT2 AC bus, an AC220V_OUT AC bus, an isolation transformer T1, an isolation transformer T2 and an isolation transformer T3; the AC400V_OUT1 AC bus is electrically connected to the AC400V_OUT2 AC bus through a circuit breaker K14 to form an AC400V_OUT AC bus; the AC400V_OUT1 AC bus leads to a third input branch, the third input branch is electrically connected to the output end of the isolation transformer T1, and the input end of the isolation transformer T1 is electrically connected to the third output branch; the AC400V_OUT2 The AC bus leads out a fourth input branch, which is electrically connected to the output end of the isolation transformer T2, and the input end of the isolation transformer T2 is electrically connected to the fourth output branch; the AC400V_OUT2 AC bus leads out a plurality of fifth input branches, which are electrically connected to the first three-phase AC input interface 2-2 through a fourth circuit breaker, and are used to supply power to the container AC power generation device; the AC400V_OUT2 AC bus leads out a fifth branch, which is electrically connected to the input end of the isolation transformer T3 through a circuit breaker K12, and the output end of the isolation transformer T3 is electrically connected to the AC220V_OUT AC bus through a circuit breaker K13.

[0147] The hybrid power system of the electric ship in the battery exchange mode also includes an electric energy management system, which is electrically connected to two groups of RS485 buses, namely a first RS485 bus RS485 I and a second RS485 bus RS485 II;

[0148] The first RS485 bus RS485 I is electrically connected to the battery management system BMS, the generator controller VCU, the left propulsion motor controller EMPC1 of the left propulsion motor M1, and the right propulsion motor controller EMPC2 of the right propulsion motor M2, respectively, so that the power management system can exchange information with the battery management system BMS, the generator controller VCU, the left propulsion motor controller EMPC1 of the left propulsion motor M1, and the right propulsion motor controller EMPC2 of the right propulsion motor M2 through the first RS485 bus RS485 I, and issue control instructions;

[0149] The second RS485 bus RS485 II is electrically connected to the instrument of the hull, the DC insulation tester and the DCC bidirectional inverter respectively, and is used for the power management system to exchange information with the instrument of the hull, the DC insulation tester and the DCC bidirectional inverter through the second RS485 bus RS485 II, and to issue control instructions;

[0150] The second RS485 bus RS485 II is also electrically connected to the AFE inverter, and is used for the power management system to exchange information with the AFE inverter through the second RS485 bus RS485 II, and to issue control instructions.

[0151] Example 4

[0152] This embodiment is basically the same as Embodiment 3, except that:

[0153] like Fig. 9 As shown, the present embodiment provides a hybrid power system for an electric ship in a battery exchange mode as described above, wherein the containerized power generation device is the containerized DC power generation device; a DC640V high-voltage DC bus is provided on the third DC distribution board of the containerized DC power generation device; the DC640V high-voltage DC bus leads out a first high-voltage DC branch line which is connected to the positive high-voltage cable and the negative high-voltage cable of the DC generator set G' of the containerized DC power generation device through a circuit breaker K51; the DC640V high-voltage DC bus leads out a second high-voltage DC branch line which is electrically connected to the high-voltage DC output interface 5-0 through a circuit breaker K58, and is electrically connected to the positive DC interface and the negative DC interface through the high-voltage DC output interface 5-0.

[0154] Furthermore, a second AC400V three-phase AC bus, a second AC220V single-phase AC bus, an isolation transformer T6 and an isolation transformer T7 are provided on the fourth DC distribution board of the containerized DC power generation device; the second AC400V three-phase AC bus leads out a first three-phase AC branch line which is electrically connected to the output end of the isolation transformer T7 through a circuit breaker K52, and the input end of the isolation transformer T7 is electrically connected to the second three-phase AC input interface 5-3 of the containerized DC power generation device, for supplying power to the internal load of the containerized AC power generation device; the second AC400V three-phase AC bus leads out a second three-phase AC branch line which is electrically connected to the input end of the isolation transformer T6 through a circuit breaker K54, and the output end of the isolation transformer T6 is electrically connected to the AC220V single-phase AC bus through a circuit breaker K55;

[0155] In this embodiment, the positive DC interface and the negative DC interface are electrically connected to the second input branch line for outputting electric energy from the containerized DC power generation device; the second three-phase AC input interface 5-3 is electrically connected to the fifth input branch line.

[0156] Example 5

[0157] like Fig.11 As shown, this embodiment provides a control method for an electric ship in a battery swap mode, including:

[0158] Step 1, confirming whether the hull is installed with the containerized power generation device;

[0159] Step 2: Estimate whether the pure electric mode can meet the navigation power demand. If it cannot meet the navigation power demand, switch to the hybrid extended-range mode;

[0160] Specifically, it is calculated whether the remaining capacity of the containerized battery can support the electric boat in the battery replacement mode to sail to the destination at a specified speed. If not, it is switched to the hybrid range-extending mode;

[0161] Step 3: compare the remaining capacity of the containerized battery with 30% of the rated capacity; when the remaining capacity of the containerized battery is greater than 30% of the rated capacity, adopt the pure electric mode; when the remaining capacity of the containerized battery is not greater than 30% of the rated capacity, switch to the hybrid extended-range mode.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric ship in a battery replacement mode, characterized in that: include: Hulls, containerized batteries and containerized power generation units; A plurality of battery exchange box positions are arranged on the deck of the hull, including a battery exchange box position and a general battery exchange box position; The battery exchange box is used to install the container-type battery or ordinary container; The universal battery exchange box is used to install the container-type battery or the container-type power generation device, or to install an ordinary container; The container-type battery is detachably mounted on the battery replacement box and is used to power the hull; The container-type power generation device is detachably mounted on the universal power exchange box position and is used for powering the hull and charging the container-type battery; The container-type power generation device is a container-type AC power generation device or a container-type DC power generation device.

2. The electric ship according to claim 1, characterized in that: A power distribution box, a propulsion motor and a propulsion motor controller are arranged in the cabin of the hull; The distribution box is electrically connected to the containerized battery, the containerized power generation device, the propulsion motor and the electrical load of the hull, respectively, and is used for distributing electrical energy to the electric ship in the battery replacement mode; The propulsion motor is used to drive the hull to sail; The propulsion motor controller is used to control the operation of the propulsion motor.

3. The electric ship according to claim 2, characterized in that: The hull is provided with an electric energy management system for information exchange and linkage control between the hull and the containerized battery, the containerized power generation device, the propulsion motor and the electric load of the hull.

4. The electric ship according to claim 3, characterized in that: A battery management system is provided in the box of the containerized battery for controlling the operation of the containerized battery; The container-type battery is also provided with a battery display screen and a battery communication interface; The battery display screen is electrically connected to the battery management system and is used to display basic information and working status of the containerized battery and manually control the operation of the containerized battery; The battery communication interface is electrically connected to the battery management system; A communication plug is provided at one end of the first RS485 bus of the power management system, which is used to be plugged into the battery communication interface through the communication plug, so that the power management system is electrically connected to the battery management system of the container-type battery.

5. The electric ship according to claim 1, characterized in that: The container-type power generation device is provided with a generator set, a power distribution board of the power generation device and a controller of the power generation device; The generator set is used for generating electricity; The power distribution board of the power generation device is electrically connected to the generator set and the load in the containerized power generation device, and is used for power distribution of the containerized power generation device; The power generation device controller is used to control the operation of the containerized power generation device.

6. The electric ship according to claim 4, characterized in that: The container-type power generation device is also provided with a power generation device display screen and a power generation device communication interface on the box body; The power generation device display screen is electrically connected to the power generation device controller and is used to display basic information and working status of the containerized power generation device and manually control the operation of the containerized power generation device; The power generation device communication interface is electrically connected to the power generation device controller; The first RS485 bus is plugged into the communication interface of the power generation device through the communication plug, so that the power management system is electrically connected to the power generation device controller of the container-type power generation device.

7. The electric ship according to claim 3, characterized in that: A first switch and a second switch are provided in the cockpit of the hull for manual switching control of the power output mode of the electric ship in the battery replacement mode, and the manual switching control has a higher priority than the automatic control of the power management system; When the first switch is turned on and the second switch is turned off, the power output mode of the electric ship in the battery replacement mode is switched to the pure electric mode; When the first switch is turned on and the second switch is turned on, the power output mode of the electric ship in the battery replacement mode is switched to the hybrid range extension mode; When the first switch is turned off and the second switch is turned on, the power output mode of the electric ship in the battery replacement mode is switched to the extended-range charging mode; The extended-range charging mode can charge the container-type battery through the container-type power generation device.

8. A hybrid power system for an electric ship, characterized in that: Applied to the electric ship as claimed in any one of claims 1 to 7, the hybrid power system comprises: a containerized battery, a containerized power generation device, a first AC distribution board, a DC distribution board, a second AC distribution board and two propulsion motors; The containerized power generation device is the containerized DC power generation device; a DC640V high-voltage DC bus is provided on the third DC distribution board of the containerized DC power generation device; the DC640V high-voltage DC bus leads out a first high-voltage DC branch line which is connected to the positive high-voltage cable and the negative high-voltage cable of the DC generator set G' of the containerized DC power generation device through a circuit breaker K51; the DC640V high-voltage DC bus leads out a second high-voltage DC branch line which is electrically connected to the high-voltage DC output interface 5-0 through a circuit breaker K58, and is electrically connected to the positive DC interface and the negative DC interface through the high-voltage DC output interface 5-0; The fourth DC distribution board of the containerized DC power generation device is provided with a second AC400V three-phase AC bus, a second AC220V single-phase AC bus, an isolation transformer T6 and an isolation transformer T7; the second AC400V three-phase AC bus leads out a first three-phase AC branch line which is electrically connected to the output end of the isolation transformer T7 through a circuit breaker K52, and the input end of the isolation transformer T7 is electrically connected to the second three-phase AC input interface 5-3 of the containerized DC power generation device, so as to supply power to the internal load of the containerized AC power generation device; the second AC400V three-phase AC bus leads out a second three-phase AC branch line which is electrically connected to the input end of the isolation transformer T6 through a circuit breaker K54, and the output end of the isolation transformer T6 is electrically connected to the AC220V single-phase AC bus through a circuit breaker K55; The positive DC interface and the negative DC interface are electrically connected to the second input branch line and are used for outputting electric energy from the containerized DC power generation device.

9. The hybrid power system according to claim 8, characterized in that: It also includes an electric energy management system, which is electrically connected to two groups of RS485 buses, namely a first RS485 bus and a second RS485 bus; The first RS485 bus is respectively connected to the battery management system, the power generation device controller, and the propulsion motor controllers of the two propulsion motors, so that the power management system exchanges information with the battery management system, the power generation device controller, and the propulsion motor controllers of the two propulsion motors through the first RS485 bus, and issues control instructions; The second RS485 bus is electrically connected to the ship's instruments, DC insulation tester and DCC bidirectional inverter respectively, and is used for the power management system to exchange information with the ship's instruments, DC insulation tester and DCC bidirectional inverter through the second RS485 bus, and to issue control instructions.

10. A control method for an electric ship in a battery swap mode according to any one of claims 1 to 7, characterized in that: include: Step 1: confirm whether the electric ship in the battery replacement mode is equipped with the containerized power generation device; Step 2: estimating whether the navigation power demand can be met by the containerized battery alone; if the navigation power demand cannot be met, starting the containerized power generation device, and switching the electric ship in the battery replacement mode from the pure electric mode to the hybrid range-extending mode; Step 3, compare the remaining capacity of the containerized battery with 30% of the rated capacity; when the remaining capacity of the containerized battery is greater than 30% of the rated capacity, the electric ship in the battery swap mode is switched to the pure electric mode; when the remaining capacity of the containerized battery is not greater than 30% of the rated capacity, the electric ship in the battery swap mode is switched to the hybrid extended-range mode.

Images