Marine power system

Abstract

The application discloses a kind of ship power systems, belong to ship field.The ship power system includes: at least one first energy storage device;At least one electric drive device, and first energy storage device is connected through cable one-to-one corresponding;At least one second energy storage device, and daily distribution system is connected through cable one-to-one corresponding.The ship power system of the application, electric drive device is directly connected with first energy storage device through cable, and second energy storage device is directly connected with daily distribution system through cable, without direct current busbar, to realize that power supply loop of electric drive device and daily distribution system is independent of each other, reduce common mode interference, to guarantee the normal operation of electrical equipment;In addition, it also simplifies circuit connection structure, improves device electrical efficiency, reduces design, production and debugging and the like cost.

Description

Technical Field

[0001] This application relates to the field of marine technology, and more specifically, to a marine electrical system. Background Technology

[0002] In related technologies, the three-electric system of pure electric ships typically integrates battery packs, AC / DC switchboards and their built-in inverters, propulsion motors and propulsion remote control devices, isolation transformers, and lighting transformers. Using a common DC bus-type DC switchboard for power distribution results in significant common-mode interference, which can disrupt the normal operation of electrical equipment. Furthermore, the switchboard often needs to be customized to meet specific project requirements, hindering standardization and leading to high design and manufacturing costs. Utility Model Content

[0003] This application provides a marine electrical system to reduce common-mode interference and lower design, production, and commissioning costs.

[0004] In a first aspect, embodiments of this application provide a ship power system, including: at least one first energy storage device; at least one electric drive device connected to the first energy storage device via cables; and at least one second energy storage device connected to a daily power distribution system via cables.

[0005] In the above technical solution, the electric drive device is directly connected to the first energy storage device via a cable, and the second energy storage device is directly connected to the daily power distribution system via a cable. This eliminates the need for a DC busbar, allowing the power supply circuits of the electric drive device and the daily power distribution system to be independent of each other, reducing common-mode interference and ensuring the normal operation of electrical equipment. In addition, there is no need to install corresponding switches for each load and power supply device, simplifying the circuit connection structure, improving the electrical efficiency of the device, and reducing design, production, and debugging costs.

[0006] In some embodiments, the first energy storage device is provided with a first plug-in portion, which is connected to a second plug-in portion of the ship's main cable, and the other end of the main cable is connected to the electric drive device.

[0007] In the above technical solution, by using a DC socket to connect to the cable plug of the ship's main circuit, electrical isolation can be achieved without the need for conversion through a DC busbar, thereby reducing common-mode interference.

[0008] In some embodiments, the first energy storage device includes: The first battery device is detachably installed inside the first energy storage device.

[0009] In the above technical solution, by setting the first energy storage device to a power swapping form, the energy replenishment efficiency can be improved.

[0010] In some embodiments, the first energy storage device further includes: The first thermal management module is located inside the first energy storage device; An auxiliary power supply unit is located inside the first energy storage device and is connected to the first thermal management module.

[0011] In some embodiments, the electric drive device includes: An electric drive unit is connected to the first energy storage device; A propulsion motor is connected to the electric drive unit; The gearbox is connected to the propulsion motor.

[0012] In the above technical solution, by integrating the electric drive unit, propulsion motor and gearbox, the gearbox output port can be directly connected to the stern shaft of the ship and bear the propeller thrust, thereby reducing the size and weight of the electric drive device, improving the ship's energy efficiency, and reducing the design and installation workload and time in the shipyard, thus improving shipbuilding efficiency.

[0013] In some embodiments, the electric drive device further includes a second thermal management module disposed inside the electric drive unit and electrically connected to the electric drive unit.

[0014] In some embodiments, the second energy storage device is provided with a third plug-in portion, which is connected to a fourth plug-in portion of the daily power distribution system.

[0015] In the above technical solution, by using an AC socket to connect to the cable plug of the ship's daily power distribution system, electrical isolation can be achieved without the need for DC busbar conversion, thus reducing common-mode interference.

[0016] In some embodiments, the second energy storage device includes: Energy management unit; The second battery device is electrically connected to the energy management unit; A power conversion device is connected to the energy management unit and the second battery device.

[0017] In some embodiments, the second battery device is detachably disposed inside the second energy storage device.

[0018] In the above technical solution, the energy replenishment efficiency can be improved by setting the second energy storage device to a power swapping form.

[0019] In some embodiments, the second energy storage device further includes: The third thermal management module is located inside the second energy storage device. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of a ship's electrical system provided in some embodiments of this application; Figure 2 This is the second schematic diagram of the structure of a ship's electrical system provided in some embodiments of this application; Figure 3 This is the third schematic diagram of the structure of a ship's electrical system provided for some embodiments of this application; Figure 4 Fourth schematic diagram of a ship's electrical system provided for some embodiments of this application; Figure 5 Fifth of several schematic diagrams of the structure of a ship's electrical system provided for embodiments of this application; Figure 6 This is the sixth schematic diagram of a ship's electrical system provided for some embodiments of this application.

[0021] Figure label: First energy storage device 1; First connector 105; First battery device 104; First thermal management module 102; Auxiliary power supply unit 103; Box 101; Electric drive unit 2; Electric drive unit 201; propulsion motor 202; gearbox 203; Second energy storage device 3; Third connector 307; Energy management unit 304; Second battery device 301; Power conversion device 302; Water cooling device 303; ventilation device 306; fire protection device 305; 4. Daily power distribution system; First power distribution unit 401; Second power distribution unit 402; Bus tie switch 403. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0024] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0028] The ship power system provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0029] In related technologies, the three-electric system of pure electric ships typically integrates battery packs, AC / DC switchboards and their built-in inverters, propulsion motors and propulsion remote control devices, isolation transformers and lighting transformers, etc. The use of a common DC bus DC switchboard for power distribution results in severe common-mode interference, which can interfere with the normal operation of electrical equipment. Furthermore, the switchboard often needs to be customized according to the functional requirements of the project, which is not conducive to its standardization and results in high design and manufacturing costs.

[0030] Based on the above considerations, in order to solve the problems of severe common-mode interference in power distribution, which interferes with the normal operation of electrical equipment, and the fact that the distribution board often needs to be customized according to the functional requirements of the project, which is not conducive to its standardization, the inventors, after in-depth research, designed a ship power system, including at least one first energy storage device; at least one electric drive device, which is connected to the first energy storage device one-to-one via cables; and at least one second energy storage device, which is connected to the daily power distribution system one-to-one via cables.

[0031] In this type of shipboard electrical system, by directly connecting the electric drive unit to the first energy storage device via cable and the second energy storage device to the daily power distribution system via cable, the power supply circuits of the electric drive unit and the daily power distribution system can be made independent without the need for a DC busbar, reducing common-mode interference and ensuring the normal operation of electrical equipment. In addition, it simplifies the circuit connection of electric ships, improves the electrical efficiency of the device, and reduces design, production and commissioning costs.

[0032] like Figure 1 As shown, the ship's electrical system includes: at least one first energy storage device 1, at least one electric drive device 2, and at least one second energy storage device 3.

[0033] It should be noted that this shipboard electrical system can be used for electrical devices that use the shipboard electrical system as a power source. These devices can be, but are not limited to, ships, electric toys, electric vehicles, electric cars, and spacecraft. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0034] The electric drive unit 2 is connected to the first energy storage unit 1 via cables, and the first energy storage unit 1 supplies power to the electric drive unit 2. The second energy storage unit 3 is connected to the daily power distribution system 4 via cables, and the second energy storage unit 3 supplies power to the daily power distribution system 4.

[0035] The electric drive unit 2 is the main propulsion power unit of the ship, which is used to convert electrical energy into mechanical energy and propel the ship.

[0036] In some embodiments, the first energy storage device 1 and the second energy storage device 3 may be installed on the main deck of the ship.

[0037] The daily power distribution system 4 is an AC power distribution system that distributes electrical energy to daily-use equipment within the ship, excluding the main propulsion system. These daily-use equipment may include, but are not limited to, lighting equipment, communication and navigation equipment, living and entertainment equipment, and some power equipment.

[0038] In some embodiments, the daily power distribution system 4 includes: a first power distribution unit 401 and a second power distribution unit 402, with the second energy storage device 3 connected to the AC bus of the first power distribution unit 401. The first power distribution unit 401 and the second power distribution unit 402 are power distribution units with different voltage levels; for example, the first power distribution unit 401 can be a 400V power distribution unit, and the second power distribution unit 402 can be a 230V power distribution unit, to adapt to different load power demands.

[0039] The first power distribution unit 401 can be divided into multiple independent segments and connected one-to-one with each of the second energy storage devices 3, and each of the second energy storage devices 3 does not operate in parallel with the grid.

[0040] In some embodiments, a bus tie switch 403 is provided on the AC bus of the first power distribution unit 401. In the default state, the bus tie switch 403 remains in the open state.

[0041] In some embodiments, taking the ship's electrical system as an example, the ship's electrical system may include two first energy storage devices 1, two electric drive devices 2, and two second energy storage devices 3. In this embodiment, when both second energy storage devices 3 are functioning normally, the bus tie switch 403 remains open, and the second energy storage devices 3 supply power to the corresponding daily-use equipment through the daily-use power distribution system 4; when either second energy storage device 3 malfunctions, the target switch closes, and the functioning second energy storage device 3 can supply power to all daily-use equipment through the daily-use power distribution system 4.

[0042] As shown in Figure 3, in some embodiments, multiple first energy storage devices 1 may be housed in the same housing 101, and the multiple first energy storage devices 1 are independent of each other and are respectively connected to the corresponding electric drive devices 2 via cables.

[0043] In some embodiments, the container 101 may be a 20-foot standard container as the carrying unit of the first energy storage device 1.

[0044] In this application, the power supply circuits of the electric drive device 2 and the daily power distribution system 4 are independent of each other.

[0045] The first energy storage device 1 is directly connected to the electric drive device 2, and the second energy storage device 3 is directly connected to the daily power distribution system 4, without needing to be transferred through the DC bus.

[0046] According to the ship power system provided in the embodiments of this application, the electric drive device 2 is directly connected to the first energy storage device 1 via a cable, and the second energy storage device 3 is directly connected to the daily power distribution system 4 via a cable. The power supply circuits of the electric drive device 2 and the daily power distribution system 4 can be made independent without a DC bus, reducing common-mode interference and ensuring the normal operation of electrical equipment. In addition, there is no need to install corresponding switches for each load and power supply device, which simplifies the circuit connection structure, improves the electrical efficiency of the device, and reduces design, production and debugging costs.

[0047] like Figure 4 As shown, in some embodiments, the first energy storage device 1 is provided with a first plug-in portion 105.

[0048] In this embodiment, the first connector 105 is connected to the second connector of the ship's main cable, and the other end of the main cable is connected to the electric drive device 2. The first energy storage device 1 can be connected to the cable plug of the ship's main circuit in the form of a DC high-voltage socket, and is powered by the electric drive device 2 via the main cable.

[0049] Both the first plug portion 105 and the second plug portion are electrical connectors, and the second plug portion is adapted to be plugged into the first plug portion 105, such as the first plug portion 105 being a socket and the second plug portion being a plug.

[0050] The main power cable of a ship is a power cable or a high-voltage cable, used to transmit high-voltage, high-current energy output from batteries or generators. It is generally used to connect the ship's core high-voltage components and charging system, and serves as the main energy backbone for ship propulsion.

[0051] Understandably, the ship also includes other cables, such as the cables for the daytime power distribution system 4, which are low-voltage cables or control cables used to distribute energy to various daytime power distribution devices, such as lighting and navigation.

[0052] According to the embodiments of this application, the ship power system is connected to the ship's main circuit via a DC socket, eliminating the need for DC busbar conversion, thus achieving electrical isolation and reducing common-mode interference.

[0053] like Figure 2 As shown, in some embodiments, the first energy storage device 1 includes a first battery device 104.

[0054] In this embodiment, the first battery device 104 is detachably disposed inside the first energy storage device 1. When the first battery device 104 is depleted, it can be removed from the first energy storage device 1 for charging, and other fully charged first battery devices 104 can be installed in the first energy storage device 1.

[0055] According to the ship power system provided in the embodiments of this application, by setting the first energy storage device 1 to a power swapping form, the energy replenishment efficiency can be improved.

[0056] like Figure 3 As shown, in some embodiments, the first energy storage device 1 further includes a first thermal management module 102 and an auxiliary power supply unit 103.

[0057] In this embodiment, a first thermal management module 102 is disposed inside the first energy storage device 1 and is used to perform cooling operations on the first energy storage device 1. In some embodiments, the thermal management module may include a liquid cooling unit, which provides coolant to each battery device through pipelines to regulate the temperature of the individual battery cells.

[0058] In some embodiments, the first thermal management module 102 may include at least one of an air-cooled device and a water-cooled device.

[0059] In some embodiments, the first thermal management module 102 can be a closed-loop air-water thermal management module that uses air and liquid media for cooling, and the liquid media operates in a closed-loop system. The liquid media may include water or a water-glycol mixture, etc.

[0060] An auxiliary power supply unit 103 is disposed inside the first energy storage device 1 and is connected to the first thermal management module 102 to supply power to the first thermal management module 102. The auxiliary power supply unit 103 can be integrated with the first thermal management module 102 into the first energy storage device 1.

[0061] According to the ship power system provided in the embodiments of this application, the first energy storage device 1 is independently thermally managed by a first thermal management module 102 in order to maintain the normal operation of the first energy storage device 1.

[0062] In some embodiments, the auxiliary power supply unit 103 may include a third battery device.

[0063] like Figure 1 As shown, in some embodiments, the electric drive device 2 includes: an electric drive unit 201, a propulsion motor 202, and a gearbox 203.

[0064] In this embodiment, the electric drive unit 201 is connected to the first energy storage device 1 and the propulsion motor 202 respectively, and the gearbox 203 is connected to the propulsion motor 202.

[0065] The electric drive unit 201 is used to control and manage the electrical energy supplied to the propulsion motor 202, and to supply the electrical energy of the first energy storage device 1 to the propulsion motor 202.

[0066] The propulsion motor 202 is used to convert electrical energy into mechanical energy to generate rotational power, including but not limited to: permanent magnet synchronous motor or AC induction motor.

[0067] The gearbox 203 is connected between the propulsion motor 202 and the propeller to reduce the rotational speed and increase the torque. The output port of the gearbox 203 can be directly connected to the stern shaft of the ship and bear the thrust of the propeller.

[0068] In this application, the electric drive unit 201, the propulsion motor 202 and the gearbox 203 can be integrated into the same electric drive device 2 to achieve a three-in-one electric drive.

[0069] According to the ship electric system provided in the embodiments of this application, by integrating the electric drive unit 201, the propulsion motor 202 and the gearbox 203, the output port of the gearbox 203 can be directly connected to the stern shaft of the ship and bear the propeller thrust, thereby reducing the volume and weight of the electric drive device 2, improving the ship's energy efficiency, and at the same time reducing the design and installation workload and time of the shipyard, thus improving shipbuilding efficiency.

[0070] In some embodiments, the electric drive unit 2 further includes a second thermal management module.

[0071] In this embodiment, the second thermal management module is disposed inside the electric drive unit 201 and is electrically connected to the electric drive unit 201, and the electric drive unit 201 supplies power to the second thermal management module.

[0072] The second thermal management module is used to perform cooling and temperature reduction operations on the electric drive unit 2. In some implementation sets, the second thermal management module can be a closed-loop air-water thermal management module.

[0073] According to the ship power system provided in the embodiments of this application, a second thermal management module is set up to perform independent thermal management on the electric drive device 2 in order to maintain the normal operation of the electric drive device 2.

[0074] like Figure 5 As shown, in some embodiments, the second energy storage device 3 is provided with a third connector 307.

[0075] In this embodiment, the third connector 307 is connected to the fourth connector of the cable of the daily power distribution system 4. The second energy storage device 3 can serve as the main power source for the daily power distribution system 4, and is connected to the main circuit cable plug of the ship's daily power distribution system 4 in the form of a marine AC socket to supply power to it.

[0076] Both the third and fourth plug-in parts are electrical connectors, and the fourth plug-in part is adapted to be plugged into the third plug-in part 307, such as the third plug-in part 307 being a socket and the fourth plug-in part being a plug.

[0077] According to the embodiments of this application, the ship power system is connected to the ship's daily power distribution system 4 by means of an AC socket, without the need for conversion through a DC busbar, which can achieve electrical isolation and reduce common-mode interference.

[0078] like Figure 5 As shown, in some embodiments, the second energy storage device 3 includes an energy management unit 304, a second battery device 301, and a power conversion device 302.

[0079] In this embodiment, the energy management unit 304 is electrically connected to the daily power distribution system 4, the second battery device 301, and the power conversion device 302, respectively; the power conversion device 302 is connected to the second battery device 301 and the daily power distribution system 4, respectively.

[0080] The second battery device 301 is used to store electrical energy and to supply power to the daily power distribution system 4. The power conversion device 302 is used to convert the direct current stored in the second battery device 301 into alternating current for use by the daily power distribution system 4.

[0081] In some embodiments, the second battery device 301 may be an integrated energy storage battery pack.

[0082] In some embodiments, the power conversion device 302 may be a hybrid energy storage converter.

[0083] The energy management unit 304 is used to control and manage the daily power distribution system 4. In some embodiments, the energy management unit 304 may be a programmable logic controller, which realizes the daily power management function through digital input / output and communication control with the battery pack.

[0084] In some embodiments, the energy management unit 304 includes a sailing mode and a mooring mode. In the sailing mode, the energy management unit 304 can automatically control the start of loads necessary for normal navigation of the ship (such as engine room fans, box-type power supply water cooling devices 303, etc.). In the mooring mode, the energy management unit 304 can automatically control the shutdown of corresponding loads to improve the ship's energy efficiency.

[0085] The second energy storage device 3 can adopt an integrated architecture of energy storage and power conversion to convert the electrical energy of the energy storage battery into 400V AC power.

[0086] In some embodiments, the second energy storage device 3 may be installed on the main deck of the ship and electrically connected to the photovoltaic modules on the main deck of the ship, for converting the electrical energy output by the photovoltaic modules into 400V AC power output, or into the electrical energy required by the second battery device 301 for storage by the second battery device 301.

[0087] In some embodiments, the second energy storage device 3 may be disposed on the photovoltaic module.

[0088] In some embodiments, the second energy storage device 3 further includes a user interaction device.

[0089] In this embodiment, the user interaction device is electrically connected to the energy management unit 304. The user interaction device is used to receive operation commands input by the user and send corresponding control commands to the energy management unit 304 based on the operation commands.

[0090] In some embodiments, the second battery device 301 is detachably disposed inside the second energy storage device 3.

[0091] In this embodiment, the second battery device 301 is detachably disposed inside the second energy storage device 3. When the second battery device 301 is depleted, it can be removed from the second energy storage device 3 for charging, and a fully charged other second battery device can be installed in the second energy storage device 3.

[0092] According to the ship power system provided in the embodiments of this application, by setting the second energy storage device 3 to a power swapping form, the energy replenishment efficiency can be improved.

[0093] In some embodiments, the second energy storage device 3 further includes a third thermal management module.

[0094] In this embodiment, the third thermal management module is disposed inside the second energy storage device 3. For example... Figure 5 As shown, in some embodiments, the third thermal management module includes at least one of a water cooling device 303, a ventilation device 306, and a fire-fighting device 305.

[0095] Among them, the water cooling device 303 and the ventilation device 306 are both heat dissipation devices used to dissipate heat from the second energy storage device 3, and can be integrated into the second energy storage device 3; the fire-fighting device 305 is installed inside the second energy storage device 3.

[0096] According to the ship power system provided in the embodiments of this application, a third thermal management module is set up to perform independent thermal management on the second energy storage device 3 in order to maintain the normal operation of the second energy storage device 3.

[0097] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0098] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0099] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0100] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0101] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0102] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0103] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0104] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0105] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0106] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The battery device is used to store or provide electrical energy.

[0107] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0108] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0109] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0110] A battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive current collector includes a current collector body and a positive electrode tab. The positive active material layer is coated on the surface of the current collector body, while the positive electrode tab is not coated with the positive active material layer and protrudes from the current collector body. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative current collector includes a current collector body and a negative electrode tab. The negative active material layer is coated on the surface of the current collector body, while the negative electrode tab is not coated with the negative active material layer and protrudes from the current collector body. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0111] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0112] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. Individual battery cells are used to store or provide electrical energy.

[0113] The following example uses the ship's electrical system, which comprises two independent sub-systems, as a case study. Figure 6 The execution logic of the ship's electrical system will be explained.

[0114] Each sub-ship power system includes: a first energy storage device 1, an electric drive device 2 connected to the first energy storage device 1 via a cable, and a second energy storage device 3 connected to the daily power distribution system 4 via a cable.

[0115] Taking one of the sub-ship's electrical systems as an example, the sub-ship's electrical system also includes: a propulsion bridge control station and a propulsion local control box; the propulsion local control box is equipped with a programmable logic controller and local control controls, and the bridge control station is equipped with propulsion control controls, a control panel and emergency control controls.

[0116] The main controller is a programmable logic controller installed in the propulsion local control box. The ship operator can input the power-on command to the main controller through the propulsion control control control of the propulsion control station. The main controller will then be powered on by the No. 1 battery system in the communication control box power supply. After the battery system is powered on, it will output DC power to the electric drive unit 2.

[0117] After the first energy storage device 1 corresponding to the electric drive device 2 is connected to high voltage, the control screen displays the high voltage status. The ship operator then inputs the start command to the electric drive device 2 by pressing the propulsion control control, and the electric drive device 2 drives the propulsion motor 202 to start.

[0118] After the propulsion motor 202 is started, the ship operator can operate the propulsion control control to control the acceleration and deceleration of the propulsion motor 202. The propulsion motor 202 is connected to the ship's stern shaft through the gearbox 203 to drive the propeller to rotate, thus driving the ship forward or backward.

[0119] In the event of a failure of the propulsion control control that results in the loss of propulsion signal, the electric drive unit 2 can maintain the current propulsion status and output alarm information. The ship operator can control the propulsion motor 202 to adjust its speed in a pulse acceleration / deceleration manner through the emergency control control of the propulsion control console to ensure navigation safety.

[0120] After the second energy storage device 3 is installed normally, the ship operator can input information through the wake-up button on the integrated panel. For example, pressing the wake-up button will activate the energy management unit 304 and perform a self-test on the system equipment. If the status is correct, the local display will show that the machine is ready for operation.

[0121] In some embodiments, the ship is equipped with an energy management system control console unit. This energy management system control console unit is used to collect status information of all equipment in the power system and to realize automatic control of the second energy storage device 3 and the daily power distribution system 4. After the second energy storage device 3 is ready for operation, the energy management system control console unit can send corresponding control commands.

[0122] In automatic operation mode, the operator can input commands through the power-on control on the energy management system console. For example, pressing the power-on control will automatically start each of the second energy storage devices 3 and their respective second battery devices 301 and power conversion devices 302, and control the main circuit switch of the daily power distribution system 4 to close and supply power to the whole ship.

[0123] Both second energy storage devices 3 are connected to the daily power distribution system 4, and the two second energy storage devices 3 are connected to the access points of the daily power distribution system 4 through a normally open bus tie switch 403. The two second energy storage devices 3 do not operate in parallel with the grid.

[0124] The battery device disclosed in this application can be used in an energy storage device, which includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0125] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile ship power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any ship power system that requires energy storage devices.

[0126] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0127] This application provides an electrical device that uses a ship's electrical system as a power source. The electrical device can be, but is not limited to, electric toys, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0128] According to the electrical device provided in the embodiments of this application, the electric drive device is directly connected to the first energy storage device via a cable, and the second energy storage device is directly connected to the daily power distribution system via a cable. This eliminates the need for a DC busbar, allowing the power supply circuits of the electric drive device and the daily power distribution system to be independent of each other, reducing common-mode interference and ensuring the normal operation of the electrical equipment. In addition, there is no need to install corresponding switches for each load and power supply device, simplifying the circuit connection structure, improving the electrical efficiency of the device, and reducing design, production, and debugging costs.

[0129] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0131] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0133] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A ship electrical system, characterized in that, include: At least one first energy storage device; At least one electric drive device is connected to the first energy storage device via cables in a one-to-one correspondence. At least one second energy storage device is connected to the daily power distribution system via cables.

2. The shipboard electrical system according to claim 1, characterized in that, The first energy storage device is provided with a first plug-in part, which is connected to a second plug-in part of the ship's main cable, and the other end of the main cable is connected to the electric drive device.

3. The shipboard electrical system according to claim 1 or 2, characterized in that, The first energy storage device includes: The first battery device is detachably installed inside the first energy storage device.

4. The ship electrical system according to claim 3, characterized in that, The first energy storage device also includes: The first thermal management module is located inside the first energy storage device; An auxiliary power supply unit is located inside the first energy storage device and is connected to the first thermal management module.

5. The shipboard electrical system according to claim 1 or 2, characterized in that, The electric drive device includes: An electric drive unit is connected to the first energy storage device; A propulsion motor is connected to the electric drive unit; The gearbox is connected to the propulsion motor.

6. The ship electrical system according to claim 5, characterized in that, The electric drive device further includes a second thermal management module, which is disposed inside the electric drive unit and electrically connected to the electric drive unit.

7. The shipboard electrical system according to claim 1 or 2, characterized in that, The second energy storage device is provided with a third plug-in portion, which is connected to the fourth plug-in portion of the cable of the daily power distribution system.

8. The ship electrical system according to claim 6, characterized in that, The second energy storage device includes: Energy management unit; The second battery device is electrically connected to the energy management unit; A power conversion device is connected to the energy management unit and the second battery device.

9. The ship electrical system according to claim 8, characterized in that, The second battery device is detachably installed inside the second energy storage device.

10. The ship electrical system according to claim 8, characterized in that, The second energy storage device also includes: The third thermal management module is located inside the second energy storage device.

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