Marine energy storage system

Abstract

The embodiment of the utility model discloses a marine energy storage system. The system comprises at least two power supply branches, each power supply branch comprises at least one battery pack and a high-voltage box, the high-voltage box comprises a first switch, and one end of the first switch is electrically connected with one end of the battery pack; one end of the first bus is electrically connected with the other end of the first switch; one end of the second bus is electrically connected with the other end of the battery pack; the marine power distribution system is electrically connected with the other end of the first bus and the other end of the second bus; wherein when at least one power supply branch has a power supply fault, the first switch corresponding to the power supply branch is switched off, and the marine power distribution system is configured to distribute the electric energy output by the power supply branch without the power supply fault, so that the electric energy can be used by the ship; therefore, the technical problem that the whole ship is directly powered off and loses power due to the failure of a certain cluster of batteries is solved, and the power supply flexibility of the marine energy storage system is greatly improved.

Description

Technical Field

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

[0002] Marine containerized energy storage systems are an innovative solution that combines electrical energy storage technology with shipping containers. Through integrated design and modular management, and composed of multiple battery clusters connected in parallel, they provide ships with an efficient, reliable, and flexible power supply. However, if a battery cluster in a marine containerized energy storage system fails, the entire system needs to be disconnected, leading to a direct power outage and loss of power for the entire ship. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a marine energy storage system that aims to solve the technical problem that a failure of a single battery cluster in a marine containerized energy storage system can lead to a direct power outage and loss of power for the entire ship.

[0004] To address the aforementioned problems, this application provides a marine energy storage system, comprising:

[0005] At least two power supply branches, each power supply branch including at least one battery pack and a high voltage box, the high voltage box including a first switch, one end of the first switch being electrically connected to one end of the battery pack;

[0006] The first busbar, one end of which is electrically connected to the other end of the first switch;

[0007] The second busbar is electrically connected at one end to the other end of the battery pack.

[0008] The marine power distribution system is electrically connected to the other end of the first busbar and the other end of the second busbar, respectively.

[0009] When at least one power supply branch experiences a power supply failure, the first switch corresponding to that power supply branch is disconnected, and the marine power distribution system is configured to distribute the electrical energy output from the power supply branches that have not experienced a power supply failure.

[0010] Furthermore, in the marine energy storage system provided in this application, the marine energy storage system also includes a combiner cabinet;

[0011] The combiner cabinet includes a second switch, which has a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal is electrically connected to the other end of the first busbar, the second terminal is electrically connected to the other end of the second busbar, and the third and fourth terminals are electrically connected to the marine power distribution system, respectively.

[0012] Furthermore, in the marine energy storage system provided in this application, the second switch is an isolating switch or a circuit breaker.

[0013] Furthermore, in the marine energy storage system provided in this application, the marine energy storage system also includes a battery management system, which is configured to adjust the ship's power to match the electrical energy output from the power supply branch where no power supply failure has occurred.

[0014] Furthermore, in the marine energy storage system provided in this application, the battery management system is also configured to control the on / off state of the first switch.

[0015] Furthermore, in the marine energy storage system provided in this application, the marine power distribution system includes a switchboard;

[0016] The distribution board is electrically connected to the other end of the first busbar and the other end of the second busbar. The distribution board is configured to distribute the electrical energy output from the power supply branches that have not experienced power supply failures.

[0017] Furthermore, in the marine energy storage system provided in this application, the high-voltage box also includes a first fuse;

[0018] Wherein, one end of the first fuse is electrically connected to one end of the battery pack, and the other end of the first fuse is electrically connected to one end of the first switch; or / and,

[0019] One end of the first fuse is electrically connected to one end of the first busbar, and the other end of the first fuse is electrically connected to the other end of the first switch.

[0020] Furthermore, in the marine energy storage system provided in this application, the high-voltage box also includes a third switch;

[0021] One end of the third switch is electrically connected to the other end of the battery pack, and the other end of the third switch is electrically connected to one end of the second busbar.

[0022] When a power supply failure occurs in a power supply branch, the first switch and / or the third switch corresponding to the power supply branch will be disconnected.

[0023] Furthermore, in the marine energy storage system provided in this application, the high-voltage box also includes a second fuse;

[0024] Wherein, one end of the second fuse is electrically connected to the other end of the battery pack, and the other end of the second fuse is electrically connected to one end of the third switch; or / and,

[0025] One end of the second fuse is electrically connected to one end of the second busbar, and the other end of the second fuse is electrically connected to the other end of the third switch.

[0026] Furthermore, in the marine energy storage system provided in this application, the first switch and the third switch are relays, circuit breakers, or disconnect switches.

[0027] The marine energy storage system provided in this application includes at least two power supply branches, a first busbar, a second busbar, and a marine power distribution system. Each power supply branch includes at least one battery pack and a high-voltage box. The high-voltage box includes a first switch located between the first busbar and the battery pack. The first busbar is electrically connected to the marine power distribution system. One end of the second busbar is electrically connected to the battery pack, and the other end of the second busbar is electrically connected to the marine power distribution system. Thus, when a power supply failure occurs in a certain power supply branch of the marine energy storage system, the circuit of the corresponding power supply branch can be disconnected simply by opening the first switch of the corresponding power supply branch. The remaining branches that have not experienced power supply failures can continue to distribute power to the ship through the marine power distribution system, ensuring that the ship can continue to be powered. This solves the technical problem that a failure in a cluster of batteries can lead to a direct power outage and loss of power for the entire ship, greatly improving the flexibility of the marine energy storage system's power supply. 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 This is an architectural diagram of a marine energy storage system provided in an embodiment of this application.

[0030] Among them, 10 is the power supply branch, 110 is the battery pack, 120 is the high voltage box, 20 is the first busbar, 30 is the second busbar, 40 is the distribution board, 50 is the combiner cabinet, FU1 is the first fuse, FU2 is the second fuse, K1 is the first switch, K2 is the second switch, and K3 is the third switch. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 connection of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific implementation.

[0036] In related technologies, marine containerized energy storage systems are based on batteries and integrate components such as a Battery Management System (BMS), a Power Conversion System (PCS), a power distribution system, a thermal management system, a fire protection system, and an intelligent remote management system. Specifically, the working principle of a marine containerized energy storage system is to charge the battery packs inside the container at the shore terminal, and then transport them to the ship, achieving a "plug-and-play" power supply. Marine containerized energy storage systems are not only easy to install and safe to maintain, but also support energy conservation and emission reduction. Furthermore, marine containerized energy storage systems offer high cost-effectiveness and flexibility, making them suitable for various types of vessels.

[0037] Since marine containerized energy storage systems consist of multiple battery clusters connected in parallel, and are connected to the ship through a disconnect switch in a combiner cabinet, the disconnect switch often needs to be disconnected to break the connection between the marine containerized energy storage system and the ship due to the failure of one of the battery clusters or even a single cell. This can lead to the entire ship losing power and becoming unpowered.

[0038] To address the technical problem that a failure in a single battery cluster within a marine containerized energy storage system can lead to a complete power outage and loss of power for the entire vessel, this application provides a marine energy storage system.

[0039] Please see Figure 1 , Figure 1 This is an architectural diagram of a marine energy storage system provided in an embodiment of this application. Figure 1 As shown, a marine energy storage system includes:

[0040] At least two power supply branches 10, each power supply branch 10 includes at least one battery pack 110 and a high voltage box 120, the high voltage box 120 includes a first switch K1, one end of the first switch K1 is electrically connected to one end of the battery pack 110;

[0041] The first busbar 20, one end of which is electrically connected to the other end of the first switch K1;

[0042] The second busbar 30, one end of which is electrically connected to the other end of the battery pack 110;

[0043] The marine power distribution system is electrically connected to the other end of the first busbar 20 and the other end of the second busbar 30, respectively;

[0044] When at least one power supply branch 10 experiences a power supply failure, the first switch K1 corresponding to the power supply branch 10 is disconnected, and the marine power distribution system is configured to distribute the electrical energy output from the power supply branch 10 that has not experienced a power supply failure for the use of the ship.

[0045] In this embodiment, the marine energy storage system can be a marine containerized energy storage system, which includes at least two parallel power supply branches 10. After multiple power supply branches 10 are connected in parallel, they are electrically connected to the marine power distribution system through two busbars, namely the first busbar 20 and the second busbar 30. The power output from the power supply branches 10 can then be distributed by the marine power distribution system for the ship's use. Furthermore, a first switch K1 is provided in the high-voltage box 120 of each power supply branch 10. The first switch K1 can be configured to control the on / off state of the circuit of the corresponding power supply branch 10. Thus, when one or more power supply branches 10 experience a power supply failure, the first switch K1 in the power supply branch 10 with the power supply failure will be disconnected to cut off the circuit of the power supply branch 10 with the power supply failure. At the same time, the first switch K1 in the power supply branch 10 without a power supply failure will be closed normally, and the power supply will continue to supply power to the ship through the marine power distribution system to continue to provide partial power to the ship, preventing the ship from completely losing power, thereby meeting the ship's emergency cruising and domestic power needs. Among them, the power supply fault that occurs in power supply branch 10 can be that the voltage of the battery cell is 0 during the power supply process of power supply branch 10.

[0046] Meanwhile, the power supply branch 10 mentioned in this application may include multiple battery packs 110, which are connected in series to form a battery cluster of a marine energy storage system. By setting multiple battery packs 110 in each power supply branch 10, and by connecting each battery pack 110 in series with a fuse and / or a relay, this application can not only increase the voltage of the power supply branch 10, but also enhance the safety performance of the power supply branch 10.

[0047] In addition, each battery pack 110 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 110, respectively. Alternatively, each battery pack 110 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 110, the second fuse FU2 can be used to cut off the circuit in which the battery pack 110 is located in time to ensure the safety of the battery pack 110.

[0048] The marine energy storage system provided in this application includes at least two power supply branches 10, a first busbar 20, a second busbar 30, and a marine power distribution system. Each power supply branch 10 includes at least one battery pack 110 and a high-voltage box 120. The high-voltage box 120 includes a first switch K1, which is located between the first busbar 20 and the battery pack 110. The first busbar 20 is electrically connected to the marine power distribution system. One end of the second busbar 30 is electrically connected to the battery pack 110, and the other end of the second busbar 30 is electrically connected to the marine power distribution system. Thus, when a power supply failure occurs in a certain power supply branch 10 of the marine energy storage system, the circuit of the corresponding power supply branch 10 can be disconnected by opening the first switch K1 of the corresponding power supply branch 10 to achieve de-clustering. The remaining branches that have not experienced power supply failures can continue to distribute power to the ship through the marine power distribution system to ensure that the ship can continue to be powered. This solves the technical problem that a failure in a certain battery cluster will cause the entire ship to lose power directly, greatly improving the power supply flexibility of the marine energy storage system.

[0049] In some embodiments, such as Figure 1 As shown, the marine energy storage system also includes a combiner cabinet 50; wherein, the combiner cabinet 50 includes a second switch K2, the second switch K2 includes a first terminal, a second terminal, a third terminal and a fourth terminal, the first terminal is electrically connected to the other end of the first bus 20, the second terminal is electrically connected to the other end of the second bus 30, and the third terminal and the fourth terminal are respectively electrically connected to the marine power distribution system.

[0050] In this embodiment, the combiner unit 50 can aggregate the electrical energy from the battery clusters in each power supply branch 10 and distribute it to the ship via the marine power distribution system for the ship's use. In marine containerized energy storage systems, the combiner unit 50 is typically configured together with other components such as lithium-ion batteries, battery management systems (BMS), and power conversion systems (PCS) to achieve efficient power management and transmission.

[0051] Meanwhile, a switch, namely the second switch K2, can also be installed in the combiner cabinet 50. This allows the second switch K2 to promptly disconnect the entire marine energy storage system's circuit in the event of a major fault, thereby further improving the system's safety. The second switch K2 is either a disconnector or a circuit breaker.

[0052] In some embodiments, the marine energy storage system further includes a battery management system configured to adjust the ship's power to match the electrical energy output from the power supply branch 10, which is not experiencing a power failure.

[0053] Specifically, 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. In particular, the BMS can systematically manage and prevent overcharging, over-discharging, and overheating of the batteries in marine energy storage systems, thereby improving battery performance and lifespan.

[0054] Meanwhile, in containerized energy storage systems, the battery management system typically includes domain management units, cluster management units, module management units, and safety modules, which can then communicate with the integrated control system to achieve more efficient battery management. Furthermore, the battery management system can adopt a modular design, allowing for expansion based on the battery configuration to adapt to different application scenarios.

[0055] In this embodiment, in addition to having the above-mentioned functions, the battery management system is also configured to adjust the ship's power to match the electrical energy output by the power supply branch 10, which has not experienced a power supply failure.

[0056] In other words, when one or more power supply branches 10 experience a power supply failure, the first switch K1 in the power supply branch 10 experiencing the power supply failure is disconnected to cut off the circuit of the power supply branch 10 experiencing the power supply failure. At the same time, the first switch K1 in the power supply branch 10 without power supply failure is closed normally and continues to supply power to the ship through the marine power distribution system. Meanwhile, the battery management system can be configured to adjust the ship's power and adjust the ship's power to match the power supply branch 10 without power failure, thereby continuing to provide partial power to the ship and preventing the ship from completely losing power, thus meeting the ship's needs for cruising and domestic electricity.

[0057] For example, a marine energy storage system may include four parallel power supply branches 10. If one of the power supply branches 10 fails to supply power during the ship's operation, the circuit of that power supply branch 10 can be cut off by the corresponding first switch K1. The other three power supply branches 10 continue to supply power to the ship. At the same time, the battery management system adjusts the ship's power to three-quarters of its original power to ensure that the ship can run at three-quarters of its original power, thus avoiding the ship from completely losing power and becoming anchored.

[0058] Furthermore, in some embodiments, the battery management system is also configured to control the on / off state of the first switch K1.

[0059] In this embodiment, the opening and closing of the first switch K1 in each power supply branch 10 can be controlled by the battery management system. Thus, when one or more power supply branches 10 experience a power supply failure, the battery management system can disconnect the first switch K1 in the power supply branch 10 experiencing the power supply failure, thereby cutting off the circuit of the power supply branch 10 experiencing the power supply failure. At the same time, the first switch K1 in the power supply branch 10 without power supply failure will be closed normally, and power will continue to be supplied to the ship through the marine power distribution system. Meanwhile, the battery management system can be configured to adjust the ship's power and adjust the ship's power to match the power supply branch 10 without power supply failure, thereby continuing to provide partial power to the ship and preventing the ship from completely losing power, thus meeting the ship's needs for cruising and domestic electricity.

[0060] In addition, the on / off state of the second switch K2 mentioned in this application can also be controlled by the battery management system, but is not limited to this.

[0061] In some embodiments, such as Figure 1 As shown, the marine power distribution system includes a switchboard 40; wherein the switchboard 40 is electrically connected to the other end of the first busbar 20 and the other end of the second busbar 30 respectively, and the switchboard 40 is configured to distribute the electrical energy output from the power supply branch 10 that has not experienced a power supply failure for use by the ship.

[0062] In this embodiment, the marine power distribution system can be part of the ship's electrical system, and the switchboard 40 in the marine power distribution system can be of various types, such as a main switchboard 40 and an emergency switchboard 40. Among them, the marine main switchboard 40 can be applied to various types of ship power stations to control, monitor and protect generator sets and distribute power grids.

[0063] In some embodiments, such as Figure 1 As shown, the high-voltage box 120 also includes a first fuse FU1; wherein one end of the first fuse FU1 is electrically connected to one end of the battery pack 110, and the other end of the first fuse FU1 is electrically connected to one end of the first switch K1; or / and,

[0064] One end of the first fuse FU1 is electrically connected to one end of the first busbar 20, and the other end of the first fuse FU1 is electrically connected to the other end of the first switch K1.

[0065] In this embodiment, by installing a first fuse FU1 in the high-voltage box 120, the circuit containing the battery pack 110 can be promptly cut off when a large short-circuit current occurs in the battery pack 110, ensuring the safety of the battery pack 110. Furthermore, the fusing current of the first fuse FU1 can be set to be no greater than the fusing current of the fuses inside the battery pack 110, thus preventing the fuses inside the battery pack 110 from blowing before the first fuse FU1. This reduces the number of fuse replacements inside the battery pack 110 when replacing the fuses in the power supply branch 10, thereby reducing the number of times the battery pack 110 can be disassembled and reassembled, greatly improving the maintenance efficiency of the marine energy storage system and reducing its maintenance costs.

[0066] In some embodiments, such as Figure 1 As shown, the high-voltage box 120 also includes a third switch K3; one end of the third switch K3 is electrically connected to the other end of the battery pack 110, and the other end of the third switch K3 is electrically connected to one end of the second busbar 30; when a power supply failure occurs in the power supply branch 10, the first switch K1 and / or the third switch K3 corresponding to the power supply branch 10 are disconnected.

[0067] In this embodiment, a third switch K3 is provided on both the high side and the low side of the high-voltage box 120. This ensures that whether a short circuit fault occurs on the high side or the low side of the high-voltage box 120, the power supply branch 10 can be cut off by the third switch K3, thereby ensuring the safety of the marine energy storage system.

[0068] Furthermore, in some embodiments, such as Figure 1As shown, the high-voltage box 120 also includes a second fuse FU2; wherein one end of the second fuse FU2 is electrically connected to the other end of the battery pack 110, and the other end of the second fuse FU2 is electrically connected to one end of the third switch K3; or / and,

[0069] One end of the second fuse FU2 is electrically connected to one end of the second busbar 30, and the other end of the second fuse FU2 is electrically connected to the other end of the third switch K3.

[0070] Specifically, this application can also install a third switch K3 and a second fuse FU2 on both the high and low sides of the high-voltage box 120, thereby further forming complete short-circuit protection for the power supply branch 10 and further improving the safety performance of the marine energy storage system. The first switch K1 and the third switch K3 are relays, circuit breakers, or disconnectors. The switching of the third switch K3 can also be controlled by the battery management system, but is not limited to this.

[0071] 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, include: At least two power supply branches, each power supply branch including at least one battery pack and a high-voltage box, the high-voltage box including a first switch, one end of the first switch being electrically connected to one end of the battery pack; The first busbar, one end of which is electrically connected to the other end of the first switch; The second busbar, one end of which is electrically connected to the other end of the battery pack; The marine power distribution system is electrically connected to the other end of the first busbar and the other end of the second busbar, respectively. When at least one of the power supply branches experiences a power supply failure, the first switch corresponding to that power supply branch is disconnected, and the marine power distribution system is configured to distribute the electrical energy output from the power supply branches that have not experienced a power supply failure.

2. The marine energy storage system according to claim 1, characterized in that, The marine energy storage system also includes a combiner cabinet; The combiner cabinet includes a second switch, which has a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal is electrically connected to the other end of the first busbar, the second terminal is electrically connected to the other end of the second busbar, and the third and fourth terminals are respectively electrically connected to the marine power distribution system.

3. The marine energy storage system according to claim 2, characterized in that, The second switch is a disconnecting switch or a circuit breaker.

4. The marine energy storage system according to claim 1, characterized in that, The marine energy storage system also includes a battery management system configured to adjust the ship's power to match the electrical energy output from the power supply branch in which no power supply failure has occurred.

5. The marine energy storage system according to claim 4, characterized in that, The battery management system is also configured to control the on / off state of the first switch.

6. The marine energy storage system according to claim 1, characterized in that, The marine power distribution system includes a switchboard; The distribution board is electrically connected to the other end of the first busbar and the other end of the second busbar, and the distribution board is configured to distribute the electrical energy output from the power supply branch that has not experienced a power supply failure.

7. The marine energy storage system according to any one of claims 1-6, characterized in that, The high-voltage box also includes a first fuse; Wherein, one end of the first fuse is electrically connected to one end of the battery pack, and the other end of the first fuse is electrically connected to one end of the first switch; or / and, One end of the first fuse is electrically connected to one end of the first busbar, and the other end of the first fuse is electrically connected to the other end of the first switch.

8. The marine energy storage system according to any one of claims 1-6, characterized in that, The high-voltage box also includes a third switch; Wherein, one end of the third switch is electrically connected to the other end of the battery pack, and the other end of the third switch is electrically connected to one end of the second busbar; When a power supply failure occurs in the power supply branch, the first switch and / or the third switch corresponding to the power supply branch are disconnected.

9. The marine energy storage system according to claim 8, characterized in that, The high-voltage box also includes a second fuse; Wherein, one end of the second fuse is electrically connected to the other end of the battery pack, and the other end of the second fuse is electrically connected to one end of the third switch; or / and, One end of the second fuse is electrically connected to one end of the second busbar, and the other end of the second fuse is electrically connected to the other end of the third switch.

10. The marine energy storage system according to claim 8, characterized in that, The first switch and the third switch are relays, circuit breakers, or disconnect switches.

Images