Marine energy storage system

Abstract

The marine energy storage system comprises at least one power supply branch and a first high-voltage box, the power supply branch comprises an energy storage device and a second high-voltage box, the energy storage device is provided with a battery positive electrode and a battery negative electrode, the second high-voltage box is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is electrically connected with the battery positive electrode, and the second interface is electrically connected with the battery negative electrode. The first high-voltage box comprises a first switching circuit, the first end of the first switching circuit is electrically connected with the third interface, the second end of the first switching circuit is electrically connected with the fourth interface, and the third end and the fourth end of the first switching circuit are both electrically connected with the marine power distribution system. Therefore, the monitoring and management of the high-voltage circuit of the marine energy storage system can be realized through the first high-voltage box, and the three-level protection of the marine energy storage system can be realized through the first switch circuit in the first high-voltage box, thereby greatly improving the safety and reliability of the marine energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a marine energy storage system. Background Technology

[0002] With the maturity of electric propulsion technology, all-electric ships have become the main direction of future ship design. Against this backdrop, marine energy storage systems, as an important component of modern ship design, have gradually evolved from providing auxiliary load power to powering various types of ship loads. In particular, as a crucial part of the ship's propulsion system, they work in conjunction with various main and auxiliary engines to improve the ship's economic and environmental characteristics while meeting diverse load requirements. However, existing marine energy storage systems typically adopt the architecture of land-based energy storage systems and are not optimized for the actual operating environment of ships, resulting in poor safety performance during practical use. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a marine energy storage system, aiming to solve the technical problem of poor safety performance in existing marine energy storage systems.

[0004] To address the aforementioned problems, this application provides a marine energy storage system, comprising at least one power supply branch and a first high-voltage box; the power supply branch includes:

[0005] The energy storage device is equipped with a positive battery terminal and a negative battery terminal;

[0006] The second high-voltage box is equipped with a first interface, a second interface, a third interface and a fourth interface. The first interface is electrically connected to the positive terminal of the battery, and the second interface is electrically connected to the negative terminal of the battery.

[0007] The first high-voltage box includes a first switching circuit. The first end of the first switching circuit is electrically connected to the third interface, the second end of the first switching circuit is electrically connected to the fourth interface, and both the third and fourth ends of the first switching circuit are electrically connected to the marine power distribution system.

[0008] Furthermore, in the marine energy storage system provided in this application, the first switching circuit includes a first switch and a second switch;

[0009] The first switch is electrically connected to the third interface at one end and to the marine power distribution system at the other end; the second switch is electrically connected to the fourth interface at one end and to the marine power distribution system at the other end.

[0010] Furthermore, in the marine energy storage system provided in this application, the first switching circuit includes an isolating switch;

[0011] The first end of the disconnecting switch is electrically connected to the third interface, the second end of the disconnecting switch is electrically connected to the fourth interface, and both the third and fourth ends of the disconnecting switch are electrically connected to the marine power distribution system.

[0012] Furthermore, in the marine energy storage system provided in this application, the first high-voltage box also includes a pre-charging circuit;

[0013] One end of the pre-charging circuit is electrically connected to the third interface and the first end of the first switching circuit, and the other end of the pre-charging circuit is electrically connected to the marine power distribution system and the second end of the first switching circuit.

[0014] Furthermore, in the marine energy storage system provided in this application, the pre-charging circuit includes a pre-charging switch and a pre-charging resistor;

[0015] One end of the precharge switch is electrically connected to the third interface and the first end of the first switch circuit, and the other end of the precharge switch is electrically connected to one end of the precharge resistor. The other end of the precharge resistor is electrically connected to the marine power distribution system and the second end of the first switch circuit.

[0016] Furthermore, in the marine energy storage system provided in this application, the second high-voltage box includes a second switching circuit;

[0017] The first terminal of the second switch circuit is electrically connected to the first interface, the second terminal of the second switch circuit is electrically connected to the second interface, the third terminal of the second switch circuit is electrically connected to the third interface, and the fourth terminal of the second switch circuit is electrically connected to the fourth interface.

[0018] Furthermore, in the marine energy storage system provided in this application, the second switching circuit includes a third switch and a fourth switch;

[0019] One end of the third switch is electrically connected to the first interface, and the other end of the third switch is electrically connected to the third interface; one end of the fourth switch is electrically connected to the second interface, and the other end of the fourth switch is electrically connected to the fourth interface.

[0020] Furthermore, in the marine energy storage system provided in this application, the second high-voltage box also includes an equalization circuit;

[0021] One end of the equalization circuit is electrically connected to the first end of the first interface and the first end of the second switch circuit, and the other end of the equalization circuit is electrically connected to the second end of the third interface and the second switch circuit.

[0022] Furthermore, in the marine energy storage system provided in this application, the balancing circuit includes a balancing switch and a balancing resistor;

[0023] One end of the equalization switch is electrically connected to the first end of the first interface and the first end of the second switch circuit, and the other end of the equalization switch is electrically connected to one end of the equalization resistor. The other end of the equalization resistor is electrically connected to the second end of the third interface and the second switch circuit.

[0024] Furthermore, in the marine energy storage system provided in this application, the battery pack, the first high-voltage box, and the second high-voltage box all communicate with each other using their respective communication interfaces; or / and,

[0025] The third and fourth terminals of the first switching circuit are both electrically connected to the marine power distribution system, which includes a DC / AC converter, an energy storage converter, or a DC distribution board.

[0026] Furthermore, in the marine energy storage system provided in this application, the energy storage device includes multiple battery packs connected in series to form a positive and negative battery electrode; or, multiple battery packs are connected in parallel to form a positive and negative battery electrode.

[0027] The marine energy storage system provided in this application includes at least one power supply branch and a first high-voltage box. The power supply branch includes an energy storage device and a second high-voltage box. The energy storage device has a positive battery terminal and a negative battery terminal. The second high-voltage box has a first interface, a second interface, a third interface, and a fourth interface. The first interface is electrically connected to the positive battery terminal, and the second interface is electrically connected to the negative battery terminal. The first high-voltage box includes a first switching circuit. The first terminal of the first switching circuit is electrically connected to the third interface, and the second terminal of the first switching circuit is electrically connected to the fourth interface. The third and fourth terminals of the first switching circuit are both electrically connected to the marine power distribution system. Thus, not only can the high-voltage circuit of the marine energy storage system be monitored and managed through the first high-voltage box, but the first switching circuit in the first high-voltage box can also provide three-level protection for the marine energy storage system, greatly improving the safety and reliability of the marine energy storage system. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A first schematic block diagram of a marine energy storage system provided in an embodiment of this application;

[0030] Figure 2 A second schematic block diagram of a marine energy storage system provided in an embodiment of this application;

[0031] Figure 3 A third schematic block diagram of a marine energy storage system provided in the embodiments of this application;

[0032] Figure 4 A fourth schematic block diagram of a marine energy storage system provided in the embodiments of this application;

[0033] Figure 5 The fifth schematic block diagram of a marine energy storage system provided in the embodiments of this application. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely 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.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0039] Please see Figure 1 , Figure 1 This is a first schematic block diagram of a marine energy storage system provided in an embodiment of this application. Figure 1As shown, this application provides a marine energy storage system, which includes at least one power supply branch 10 and a first high-voltage box 20; the power supply branch 10 includes:

[0040] The energy storage device 200 is equipped with a battery positive terminal and a battery negative terminal;

[0041] The second high-voltage box 100 is provided with a first interface 110, a second interface 120, a third interface 130 and a fourth interface 140. The first interface 110 is electrically connected to the positive terminal of the battery and the second interface 120 is electrically connected to the negative terminal of the battery.

[0042] The first high-voltage box 20 includes a first switching circuit 300. The first end of the first switching circuit 300 is electrically connected to the third interface 130, the second end of the first switching circuit 300 is electrically connected to the fourth interface 140, and both the third and fourth ends of the first switching circuit 300 are electrically connected to the marine power distribution system.

[0043] In this embodiment, the marine energy storage system can be a marine containerized energy storage system, which includes at least one power supply branch 10 and a first high-voltage box 20. The power supply branch 10 is provided with a second high-voltage box 100 and an energy storage device 200. The energy storage device 200 is provided with a battery positive terminal and a battery negative terminal. The high-voltage box is provided with a first interface 110, a second interface 120, a third interface 130 and a fourth interface 140. The first interface 110 is electrically connected to the battery positive terminal and the second interface 120 is electrically connected to the battery negative terminal. At the same time, a first switching circuit 300 is provided between the second high-voltage box 100 and the marine power distribution system, which not only realizes the monitoring and management of the high-voltage circuit of the marine energy storage system, but also realizes the three-level protection of the energy storage system, thereby improving the safety and reliability of the marine energy storage system.

[0044] The first high-voltage box 20 can be a group high-voltage box, and the second high-voltage box 100 can be a cluster high-voltage box. A power supply branch 10 can be understood as a battery cluster. A group high-voltage box generally refers to a high-voltage box used when multiple battery clusters are connected in parallel to form a battery stack. A group high-voltage box can consist of a high-voltage power supply board (such as a DC / DC converter, pre-charge module, fuses, sensors, high-voltage acquisition and communication module), a main switch, and contactors. The main function of the group high-voltage box is to aggregate the outputs of multiple battery clusters and provide a unified high-voltage output interface. Group high-voltage boxes are commonly used in large-scale energy storage systems, such as those above 6MWh, which not only require different grouping methods but also place higher demands on the battery management system. Group high-voltage boxes can support the parallel connection of multiple battery clusters, thereby improving the overall efficiency and reliability of the system. At the same time, group high-voltage boxes typically have larger capacities and higher voltage levels, making them suitable for large-scale energy storage applications. Their design needs to consider the parallel connection requirements of multiple battery clusters, as well as corresponding heat dissipation and protection measures. Furthermore, group high-voltage boxes also need to have flexible customization capabilities to adapt to different installation and wiring requirements.

[0045] The cluster high-voltage box is primarily used to manage the power circuits of battery clusters. It integrates components such as circuit breakers, contactors, fuses, shunts, pre-charge circuits, switching power supplies, and battery cluster management modules, forming a complete battery cluster management system responsible for voltage and current acquisition, temperature monitoring, and data communication. The cluster high-voltage box is typically used to connect single or multiple battery clusters and link them to energy storage converters or other control devices. For example, in large-scale energy storage power stations, one cluster high-voltage box can connect to two battery clusters, achieving a two-input, two-output configuration. Furthermore, the cluster high-voltage box is suitable for various energy storage scenarios, including source-grid-load and shared energy storage. Simultaneously, the design of the cluster high-voltage box must consider explosion-proof, fire-proof, and anti-theft factors to ensure the safe operation of the system. Its internal structure is complex, integrating various electronic controllers and sensors to achieve comprehensive management of the battery clusters.

[0046] The energy storage device 200 mentioned in this application may include multiple battery packs 201, which are connected in series to form a cluster of batteries in a marine energy storage system. By incorporating multiple battery packs 201 into the energy storage device 200, and by connecting each battery pack 201 in series with a fuse and / or relay, this application not only increases the voltage of the power supply branch but also enhances its safety performance. Furthermore, when the energy storage device 200 includes multiple battery packs 201, these battery packs 201 can also be connected in parallel to form a cluster of batteries in a marine energy storage system.

[0047] Meanwhile, each battery pack 201 may also include a fuse and at least one battery cell. The fuse and at least one battery cell are connected in series and then connected to the input and output terminals of the battery pack 201, respectively. Alternatively, each battery pack 201 may include at least one fuse and at least one battery cell. The fuse and battery cell are connected in series one-to-one and then electrically connected to the input and output terminals, respectively, to achieve parallel connection. In this way, when a short circuit occurs in the battery pack 201, the second fuse can promptly cut off the circuit in which the battery pack 201 is located, thereby ensuring the safety of the battery pack 201.

[0048] The marine energy storage system provided in this application includes at least one power supply branch 10 and a first high-voltage box 20. The power supply branch 10 includes an energy storage device 200 and a second high-voltage box 100. The energy storage device 200 is provided with a positive battery terminal and a negative battery terminal. The second high-voltage box 100 is provided with a first interface 110, a second interface 120, a third interface 130, and a fourth interface 140. The first interface 110 is electrically connected to the positive battery terminal, and the second interface 120 is electrically connected to the negative battery terminal. The first high-voltage box 20 includes a first switching circuit 300. The first end of the first switching circuit 300 is electrically connected to the third interface 130, and the second end of the first switching circuit 300 is electrically connected to the fourth interface 140. The third and fourth ends of the first switching circuit 300 are both electrically connected to the marine power distribution system. Thus, not only can the high-voltage circuit of the marine energy storage system be monitored and managed through the first high-voltage box 20, but the first switching circuit 300 in the first high-voltage box 20 can also provide three-level protection for the marine energy storage system, greatly improving the safety and reliability of the marine energy storage system.

[0049] In some embodiments, such as Figure 2 and Figure 3 As shown, the first switch circuit 300 includes a first switch 310 and a second switch 320; wherein, one end of the first switch 310 is electrically connected to the third interface 130, and the other end of the first switch 310 is electrically connected to the marine power distribution system; one end of the second switch 320 is electrically connected to the fourth interface 140, and the other end of the second switch 320 is electrically connected to the marine power distribution system.

[0050] In this embodiment, the on / off state of the first switch 310 and the second switch 320 can both be controlled by the battery management system of the marine energy storage system, and both the first switch 310 and the second switch 320 can be relays.

[0051] The battery management system (BMS) is responsible for the charging and discharging management, status monitoring and analysis, power management, and protection functions of the batteries in marine energy storage systems. Specifically, the BMS can systematically manage and prevent overcharging, over-discharging, and overheating of the batteries in marine energy storage systems, thereby improving the battery performance and lifespan of the marine energy storage system.

[0052] Meanwhile, in marine energy storage systems, battery management systems typically include domain management units, cluster management units, module management units, and safety modules, enabling communication with the integrated control system for more efficient battery management. Furthermore, battery management systems can adopt a modular design, allowing for expansion based on battery configuration to adapt to different application scenarios.

[0053] In some embodiments, the first switching circuit 300 includes a disconnecting switch; wherein, the first end of the disconnecting switch is electrically connected to the third interface 130, the second end of the disconnecting switch is electrically connected to the fourth interface 140, and both the third and fourth ends of the disconnecting switch are electrically connected to the marine power distribution system.

[0054] Specifically, an isolating switch is a switching device used in an electrical system to ensure safe circuit isolation. Its main function is to physically disconnect the circuit to ensure complete power disconnection during maintenance and repair, preventing electric shock or other hazards. When in the open position, the isolating switch has a specified insulation distance between its contacts and a clear disconnection mark; when in the closed position, it can carry current under normal circuit conditions and current under abnormal conditions (e.g., short circuit) for a specified time. In this embodiment, the opening and closing of the isolating switch can be controlled by the battery management system of the marine energy storage system, which can replace the first switch 310 and the second switch 320 mentioned in the above embodiments.

[0055] In some embodiments, such as Figure 3 As shown, the first high-voltage box 20 also includes a pre-charging circuit 400; wherein, one end of the pre-charging circuit 400 is electrically connected to the third interface 130 and the first end of the first switching circuit 300 respectively, and the other end of the pre-charging circuit 400 is electrically connected to the marine power distribution system and the second end of the first switching circuit 300 respectively.

[0056] In this embodiment, the pre-charging circuit 400 can prevent inrush current from occurring during the charging and discharging of the marine energy storage system. Specifically, after the power supply branch 10 is powered on, pre-charging is performed through the pre-charging circuit 400. After pre-charging is completed, the first switching circuit 300 in the first high-voltage box 20 is turned on, and the pre-charging circuit 400 is turned off, thereby significantly improving the start-up performance and safety of the marine energy storage system.

[0057] Furthermore, in some embodiments, such as Figure 3 As shown, the pre-charging circuit 400 includes a pre-charging switch 410 and a pre-charging resistor 420; wherein, one end of the pre-charging switch 410 is electrically connected to the third interface 130 and the first end of the first switching circuit 300 respectively, the other end of the pre-charging switch 410 is electrically connected to one end of the pre-charging resistor 420, and the other end of the pre-charging resistor 420 is electrically connected to the marine power distribution system and the second end of the first switching circuit 300 respectively.

[0058] Specifically, after the power supply branch 10 is powered on, the main negative switch in the first switching circuit 300, i.e. the second switch 320, can be closed first, and then the pre-charge switch 410 can be closed. After a preset time, i.e. after the pre-charge is completed, the main positive switch in the first switching circuit 300, i.e. the first switch 310, can be closed. Then the pre-charge switch 410 can be opened to realize the normal power-on of the marine energy storage system.

[0059] In some embodiments, the first high-voltage box 20 is provided with a charging and discharging interface, which includes a charging and discharging positive terminal and a charging and discharging negative terminal; wherein, one end of the charging and discharging positive terminal is electrically connected to the third terminal of the first switching circuit 300 and the other end of the pre-charging circuit 400, and the other end of the charging and discharging positive terminal is electrically connected to the marine power distribution system; one end of the charging and discharging negative terminal is electrically connected to the fourth terminal of the first switching circuit 300, and the other end of the charging and discharging negative terminal is electrically connected to the marine power distribution system.

[0060] In some embodiments, such as Figure 4 and Figure 5 As shown, the second high-voltage box 100 includes a second switching circuit 150; wherein, the first end of the second switching circuit 150 is electrically connected to the first interface 110, the second end of the second switching circuit 150 is electrically connected to the second interface 120, the third end of the second switching circuit 150 is electrically connected to the third interface 130, and the fourth end of the second switching circuit 150 is electrically connected to the fourth interface 140.

[0061] In this embodiment, the second high-voltage box 100 uses a second switching circuit 150 to control the on / off state of the power supply branch 10 where the second high-voltage box 100 is located. When it is necessary to disconnect the main circuit of the power supply branch 10, it can be achieved by disconnecting the second switching circuit 150; when it is necessary to connect the main circuit of the power supply branch 10, it can be achieved by connecting the second switching circuit 150.

[0062] Furthermore, in some embodiments, such as Figure 4 and Figure 5 As shown, the second switch circuit 150 includes a third switch 151 and a fourth switch 152; wherein, one end of the third switch 151 is electrically connected to the first interface 110, and the other end of the third switch 151 is electrically connected to the third interface 130; one end of the fourth switch 152 is electrically connected to the second interface 120, and the other end of the fourth switch 152 is electrically connected to the fourth interface 140.

[0063] In this embodiment, the on / off state of the third switch 151 and the fourth switch 152 can both be controlled by the battery management system of the marine energy storage system, and both the third switch 151 and the fourth switch 152 can be relays.

[0064] In addition, the first switch 310, the second switch 320, the third switch 151 and the fourth switch 152 can also be controlled by the ship management system. The on / off control method of the first switch 310, the second switch 320, the third switch 151 and the fourth switch 152 mentioned in this application can be selected according to the actual application, and this application does not make specific limitations.

[0065] In some embodiments, such as Figure 5As shown, the second high-voltage box 100 also includes an equalization circuit 160; wherein, one end of the equalization circuit 160 is electrically connected to the first end of the first interface 110 and the second switch circuit 150 respectively, and the other end of the equalization circuit 160 is electrically connected to the second end of the third interface 130 and the second switch circuit 150 respectively.

[0066] Because the internal resistance of each cell in a marine energy storage system varies, and the differences are even more pronounced after the cells are integrated into a battery cluster, the marine energy storage system needs to balance the batteries on each power supply branch 10 before discharging to ensure voltage consistency between each power supply branch 10.

[0067] In this embodiment, an equalization circuit 160 can be set between the positive terminal of the battery and the positive terminal of the discharge circuit. This allows the marine energy storage system to discharge when needed, ensuring voltage consistency across all power supply branches 10. It also helps prevent inrush currents during charging and discharging. Specifically, when power supply branch 10 is powered on, the main negative switch (fourth switch 152) in the second high-voltage box 100 is first closed, then the equalization circuit 160 is activated. After a preset time, the main positive switch (third switch 151) in the second high-voltage box 100 is closed, and then the equalization circuit 160 is deactivated. This significantly improves the startup performance and safety of the marine energy storage system.

[0068] Furthermore, in some embodiments, such as Figure 5 As shown, the equalization circuit 160 includes an equalization switch 161 and an equalization resistor 162; wherein, one end of the equalization switch 161 is electrically connected to the first terminal of the first interface 110 and the second switch circuit 150, and the other end of the equalization switch 161 is electrically connected to one end of the equalization resistor 162, and the other end of the equalization resistor 162 is electrically connected to the second terminal of the third interface 130 and the second switch circuit 150.

[0069] In this embodiment, the switching on and off of the equalization switch 161 can be controlled by the battery management system, and the equalization switch 161 can be a relay. Alternatively, the switching on and off of the equalization switch 161 can also be controlled by the ship management system. The switching control of the equalization switch 161 can be selected according to the actual application, and this application does not impose specific limitations.

[0070] In some embodiments, the energy storage device 200, the first high-voltage box 20, and the second high-voltage box 100 communicate with each other using their respective communication interfaces.

[0071] In this embodiment, the energy storage device 200 may include multiple battery packs 201, each of which may be equipped with a communication interface. The communication interfaces between the battery packs 201 may be electrically connected for communication. Simultaneously, both the first high-voltage box 20 and the second high-voltage box 100 are equipped with communication interfaces. The communication interfaces between the battery packs 201 and the second high-voltage box 100, as well as between the first high-voltage box 20 and the second high-voltage box 100, may also be electrically connected for communication. Therefore, the battery management system or the ship management system can manage the first high-voltage box 20, the second high-voltage box 100, and the battery packs 201 through the communication interfaces of the battery packs 201 and the high-voltage boxes, greatly improving the safety and reliability of the marine energy storage system.

[0072] In some embodiments, the third and fourth terminals of the first switching circuit 300 are both electrically connected to a marine power distribution system, which includes a DC / AC converter, an energy storage converter, or a DC power distribution board.

[0073] In this embodiment, the marine power distribution system can be part of the ship's electrical system, and the switchboard in the marine power distribution system can be of various types, such as the main switchboard and the emergency switchboard. Among them, the marine main switchboard can be applied to various types of ship power stations to control, monitor and protect generator sets and distribute power grids.

[0074] DC / AC converters, energy storage converters, and DC distribution boards can be installed in marine power distribution systems. A DC / AC converter, also known as an inverter, is a device that converts direct current (DC) to alternating current (AC). DC / AC converters primarily use power semiconductor devices (such as IGBTs or MOSFETs) to achieve the DC-to-AC conversion. Energy storage converters can control the charging and discharging process of power supply branch 10 and perform AC-DC conversion; they can also directly supply power to AC loads in the absence of a power grid. DC distribution boards are devices used to distribute and manage DC power and are widely used in various industrial, marine, and new energy fields.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A marine energy storage system, characterized in that, It includes at least one power supply branch and a first high-voltage box; the power supply branch includes: The energy storage device is equipped with a positive battery terminal and a negative battery terminal; The second high-voltage box is provided with a first interface, a second interface, a third interface and a fourth interface. The first interface is electrically connected to the positive terminal of the battery, and the second interface is electrically connected to the negative terminal of the battery. The first high-voltage box includes a first switching circuit, the first end of which is electrically connected to the third interface, the second end of which is electrically connected to the fourth interface, and both the third and fourth ends of which are electrically connected to the marine power distribution system.

2. The marine energy storage system according to claim 1, characterized in that, The first switching circuit includes a first switch and a second switch; Wherein, one end of the first switch is electrically connected to the third interface, and the other end of the first switch is electrically connected to the marine power distribution system; one end of the second switch is electrically connected to the fourth interface, and the other end of the second switch is electrically connected to the marine power distribution system.

3. The marine energy storage system according to claim 1, characterized in that, The first switching circuit includes an isolating switch; The first end of the disconnecting switch is electrically connected to the third interface, the second end of the disconnecting switch is electrically connected to the fourth interface, and both the third and fourth ends of the disconnecting switch are electrically connected to the marine power distribution system.

4. The marine energy storage system according to claim 1, characterized in that, The first high-voltage box also includes a pre-charging circuit; One end of the pre-charging circuit is electrically connected to the third interface and the first end of the first switching circuit, and the other end of the pre-charging circuit is electrically connected to the marine power distribution system and the second end of the first switching circuit.

5. The marine energy storage system according to claim 4, characterized in that, The pre-charging circuit includes a pre-charging switch and a pre-charging resistor; Wherein, one end of the precharge switch is electrically connected to the third interface and the first end of the first switch circuit, the other end of the precharge switch is electrically connected to one end of the precharge resistor, and the other end of the precharge resistor is electrically connected to the marine power distribution system and the second end of the first switch circuit.

6. The marine energy storage system according to any one of claims 1-5, characterized in that, The second high-voltage box includes a second switching circuit; Wherein, the first terminal of the second switch circuit is electrically connected to the first interface, the second terminal of the second switch circuit is electrically connected to the second interface, the third terminal of the second switch circuit is electrically connected to the third interface, and the fourth terminal of the second switch circuit is electrically connected to the fourth interface.

7. The marine energy storage system according to claim 6, characterized in that, The second switching circuit includes a third switch and a fourth switch; Wherein, one end of the third switch is electrically connected to the first interface, and the other end of the third switch is electrically connected to the third interface; one end of the fourth switch is electrically connected to the second interface, and the other end of the fourth switch is electrically connected to the fourth interface.

8. The marine energy storage system according to claim 6, characterized in that, The second high-voltage box also includes an equalization circuit; One end of the equalization circuit is electrically connected to the first end of the first interface and the first end of the second switch circuit, and the other end of the equalization circuit is electrically connected to the third interface and the second end of the second switch circuit.

9. The marine energy storage system according to claim 8, characterized in that, The equalization circuit includes an equalization switch and an equalization resistor; Wherein, one end of the equalization switch is electrically connected to the first end of the first interface and the first end of the second switch circuit, the other end of the equalization switch is electrically connected to one end of the equalization resistor, and the other end of the equalization resistor is electrically connected to the second end of the third interface and the second switch circuit.

10. The marine energy storage system according to any one of claims 1-5, characterized in that, The energy storage device includes multiple battery packs, and the battery packs, the first high-voltage box, and the second high-voltage box communicate with each other via their respective communication interfaces; or / and, The third and fourth terminals of the first switching circuit are both electrically connected to the marine power distribution system, which includes a DC / AC converter, an energy storage converter, or a DC power distribution board.

11. The marine energy storage system according to any one of claims 1-5, characterized in that, The energy storage device includes multiple battery packs connected in series to form the positive and negative terminals of the batteries; or, multiple battery packs connected in parallel to form the positive and negative terminals of the batteries.

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