AC-DC integrated liquid-cooled energy storage container system

Abstract

The application relates to an AC-DC integrated liquid-cooled energy storage container system, which comprises a container body, and further comprises: at least one battery cluster, which is arranged at a middle position of the container body and separates an internal space of the container body into an electrical control room located at one side and an inverter room located at the other side; at least one bidirectional inverter arranged in the inverter room; an AC bus device and a liquid-cooled main machine, both of which are arranged in the electrical control room; and a liquid-cooled pipeline in circulation connection with the liquid-cooled main machine, which extends to the battery cluster to cool the same. The AC-DC integrated liquid-cooled energy storage container system designed by the application has an integrated structure with the battery cluster as the center to define the functional partition, the components such as the converter, the AC-DC bus and the liquid cooling are prefabricated in the single container, the rapid deployment is realized, and the system land occupation is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an AC / DC integrated liquid-cooled energy storage container system. Background Technology

[0002] In existing technologies, with the continuous increase in the proportion of new energy power generation such as wind and solar power, their inherent volatility and intermittency pose a significant challenge to the stable operation of the power grid. Large-scale battery energy storage systems (BESS), as a key technology for smoothing power fluctuations, improving power quality, and promoting the consumption of new energy sources, have experienced rapid development in recent years. Containerized energy storage systems, due to their advantages of standardization, modularity, ease of transportation, and deployment, have become the mainstream physical form of current large-scale energy storage power stations.

[0003] Currently, traditional containerized energy storage solutions typically employ a split or distributed layout. For example, a common approach is to integrate the battery system into a single container, while critical AC equipment such as the AC / DC converter (PCS), AC combiner cabinet, and step-up transformer need to be installed as separate units outside the project site. This layout results in a large footprint for the entire energy storage power station, substantial on-site civil engineering and cable laying work, and a long construction period. Furthermore, long-distance energy transmission between multiple distributed devices introduces additional line losses, leading to a reduction in overall system efficiency. Utility Model Content

[0004] To address the aforementioned issues, this application provides a compact and rapidly deployable AC / DC integrated liquid-cooled energy storage container system.

[0005] To achieve the above objectives, the AC / DC integrated liquid-cooled energy storage container system designed in this application includes a container body, and the system further includes: At least one battery cluster is disposed in the middle of the container body, and the battery cluster divides the internal space of the container body into an electrical control compartment on one side and an inverter compartment on the other side. At least one bidirectional inverter is disposed within the inverter compartment; An AC combiner and a liquid-cooled main unit are both located within the electrical control compartment; A liquid cooling pipeline is circulatedly connected to the liquid cooling host, and the liquid cooling pipeline extends to the battery cluster to cool it; The DC side of the bidirectional inverter is electrically connected to the battery cluster; the AC side of the bidirectional inverter, at least one external AC power interface, and at least one external AC load interface are all electrically connected to the AC combiner device.

[0006] Preferably, the system further includes an air-cooling system, which includes a cooling fan installed on the wall of the inverter compartment for independent ventilation and heat dissipation of the inverter compartment.

[0007] Preferably, there are at least two bidirectional inverters arranged side by side in the inverter compartment; the cooling fan is located on the end wall of the inverter compartment away from the battery cluster to form a cooling air duct that runs through the inverter compartment.

[0008] Preferably, the battery cluster includes multiple battery packs connected in parallel, and the multiple battery packs are divided into at least two DC power supply branches, each of which is connected to the DC side of an independent bidirectional inverter; the AC combiner includes a common AC bus, and the AC sides of all the bidirectional inverters are connected in parallel to the common AC bus, and the external AC power interface and the external AC load interface are both connected to the common AC bus.

[0009] Preferably, the number of battery clusters is at least two, and they are arranged symmetrically along the width of the container body so that the center of gravity of the container body remains centered.

[0010] Preferably, the electrical control compartment is further equipped with a control distribution cabinet for centralized control of the system and / or a dehumidifying air conditioner for regulating the humidity inside the compartment.

[0011] Preferably, the external AC power interface includes an AC mains input interface and / or a photovoltaic input interface; the external AC load interface includes at least one output circuit for connecting an external electrical load.

[0012] Preferably, the system further includes a fire suppression system, which includes a temperature or smoke detector installed in the space accommodating the battery cluster, and a fire extinguishing device that is linked to the smoke detector signal; wherein the fire extinguishing device is an aerosol fire extinguishing device; when the smoke detector detects a fire warning signal, the fire suppression system controls the fire extinguishing device to start and also controls the cooling fan of the inverter compartment to stop running.

[0013] Preferably, a manual alarm button, an audible and visual alarm, and a fire inlet and a fire outlet for connecting to an external fire water source are also provided on the outer wall of the container.

[0014] The AC / DC integrated liquid-cooled energy storage container system designed in this application utilizes an integrated structure that defines functional zones around battery clusters. It prefabricates components such as converters, AC / DC converters, and liquid cooling systems within a single container, enabling rapid deployment and reducing system footprint. Furthermore, its temperature control strategies for battery liquid cooling and inverter air cooling, combined with a unified AC / DC electrical topology, effectively improve the system's energy density, operating efficiency, and adaptability to complex scenarios such as photovoltaic, energy storage, and charging compared to existing technologies. A multi-level, interconnected fire protection design ensures enhanced operational safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the planar structure of the AC / DC integrated liquid-cooled energy storage container system provided in the embodiments of this application.

[0016] Figure 2 yes Figure 1 Sectional view at point AA.

[0017] Figure 3 This is an assembly diagram of the cooling fan provided in an embodiment of this application.

[0018] Figure 4 This is an electrical topology diagram of the AC / DC integrated liquid-cooled energy storage container system provided in the embodiments of this application.

[0019] The components include: container body 100, electrical control compartment 200, battery cluster 210, battery pack 211, AC combiner device 220, liquid cooling host 230, liquid cooling pipeline 240, control distribution cabinet 250, dehumidifying air conditioner 260, inverter compartment 300, bidirectional inverter 310, cooling fan 320, manual alarm button 431, audible and visual alarm 432, fire water inlet 433, and fire water outlet 434. Detailed Implementation

[0020] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] like Figure 1 , Figure 2As shown, the AC / DC integrated liquid-cooled energy storage container system described in this embodiment is entirely integrated into a standard-sized container 100, such as a 20-foot container. The core structure of this system is that at least one battery cluster 210 is positioned in the center of the container 100. This centralized layout not only optimizes the overall system's center of gravity, facilitating stability during transportation and hoisting, but also naturally defines the internal space of the container 100 into two functionally independent areas: an electrical control compartment 200 located on one side of the battery cluster 210 and an inverter compartment 300 located on the other side. This physical partitioning design achieves thermal and safety isolation for critical equipment.

[0022] At least one bidirectional inverter 310 is installed in the inverter compartment 300. The bidirectional inverter 310 is the core component for realizing bidirectional AC-DC energy conversion. The electrical control compartment 200 integrates an AC combiner device 220 and a liquid-cooled main unit 230.

[0023] To achieve precise thermal management of the battery cluster 210, a liquid cooling pipeline 240 is also included, which is circulatedly connected to the liquid cooling host 230. The liquid cooling pipeline 240 extends to the battery cluster 210 to cool it. Specifically, the liquid cooling host 230 is circulatedly connected to the liquid cooling plate inside the battery cluster 210 through the liquid cooling pipeline 240. During system operation, the liquid cooling host 230 drives the cooling medium to circulate in the pipeline, stably removing the heat generated by the battery cluster 210 during charging and discharging, ensuring that it operates within the optimal temperature range, thereby guaranteeing the safety and cycle life of the system.

[0024] In terms of electrical connections, such as Figure 4 As shown, the DC side of the bidirectional inverter 310 is electrically connected to the battery cluster 210; the AC side of the bidirectional inverter 310, at least one external AC power interface, and at least one external AC load interface are all electrically connected to the AC combiner device 220. In this way, the system constructs a unified energy collection and distribution platform within a single enclosure.

[0025] In some embodiments, such as Figure 2 , Figure 3 As shown, the system also includes an air-cooling system, which includes a cooling fan 320 mounted on the wall of the inverter compartment 300 for independent ventilation and heat dissipation of the inverter compartment 300, in order to cope with the large amount of heat generated by the bidirectional inverter 310 inside the inverter compartment 300 during operation.

[0026] More specifically, such as Figure 2 , Figure 3As shown, there are at least two bidirectional inverters 310 arranged side by side within the inverter compartment 300. The cooling fan 320 is preferably located on the end wall of the inverter compartment 300 away from the battery cluster 210. This allows external cold air to enter from the other end, flow across the surface of the bidirectional inverter 310, and finally be exhausted by the cooling fan 320, forming a dedicated channel throughout the entire inverter compartment 300 for guiding airflow and achieving efficient forced air cooling of the inverters.

[0027] In some embodiments, such as Figure 4 As shown, the battery cluster 210 includes multiple parallel battery packs 211. Each battery pack 211 is divided into at least two DC power supply branches, and each DC power supply branch is connected to the DC side of an independent bidirectional inverter 310. Specifically, the output of the battery packs 211 can be combined to a high-voltage control box and then connected to the DC side of the bidirectional inverter 310 to achieve modular management and flexible power distribution on the DC side. On the AC side, the AC combiner device 220 includes a common AC bus. The AC sides of all the bidirectional inverters 310 are connected in parallel to the common AC bus. The external AC power interface and the external AC load interface are both connected to the common AC bus, forming a flexible multi-source, multi-host electrical architecture.

[0028] In some embodiments, such as Figure 2 As shown, the number of battery clusters 210 is at least two, and they are arranged symmetrically along the width direction of the container body 100 to keep the center of gravity of the container body 100 centered. Meanwhile, the electrical control compartment 200 is also equipped with a control distribution cabinet 250 for centralized control of the system and / or a dehumidifying air conditioner 260 for regulating the humidity inside the compartment, ensuring stable system operation.

[0029] In some embodiments, such as Figure 4 As shown, the external AC power interface includes a mains input interface and / or a photovoltaic input interface; the external AC load interface includes at least one output circuit for connecting external electrical loads. Thus, when the system in this embodiment is operating, AC power can be obtained through the external AC power interface, such as the mains input interface or the photovoltaic input interface, and rectified by the AC combiner 220 and the bidirectional inverter 310 to charge the battery cluster 210; or DC power can be discharged from the battery cluster 210, inverted into AC power by the bidirectional inverter 310, and then used to power external loads or feed power to the grid through the AC combiner 220 and the external AC load interface. The entire system is highly integrated, plug-and-play, greatly simplifying on-site deployment and improving the overall performance of the energy storage system.

[0030] In some embodiments, the system further includes a fire suppression system, which includes a temperature or smoke detector disposed in the space accommodating the battery cluster 210, and a fire extinguishing device that is linked to the smoke detector signal; wherein the fire extinguishing device is an aerosol fire extinguishing device; when the smoke detector detects a fire warning signal, the fire suppression system controls the fire extinguishing device to start and controls the cooling fan 320 of the inverter compartment 300 to stop running in conjunction with it, so as to prevent the airflow from fueling the fire or dispersing the fire extinguishing agent.

[0031] In addition, such as Figure 1 As shown, a manual alarm button 431, an audible and visual alarm 432, and a fire inlet 433 and a fire outlet 434 for connecting to an external fire water source are also installed on the outer wall of the container body 100. This constitutes a multi-layered safety protection system that combines automatic and manual operation, as well as internal and external protection.

[0032] The AC / DC integrated liquid-cooled energy storage container system provided in this application, through an integrated structure that defines functional zones centered on battery clusters, prefabricates components such as inverters, AC / DC converters, and liquid cooling systems within a single container, achieving rapid deployment and reducing system footprint. Simultaneously, its temperature control strategies for battery liquid cooling and inverter air cooling, combined with a unified AC / DC electrical topology, effectively improve the system's energy density, operating efficiency, and adaptability to complex scenarios such as photovoltaic, energy storage, and charging compared to existing technologies. Furthermore, its multi-level linkage fire protection design ensures higher operational safety.

[0033] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An AC / DC integrated liquid-cooled energy storage container system, comprising a container body, characterized in that, The system also includes: At least one battery cluster is disposed in the middle of the container body, and the battery cluster divides the internal space of the container body into an electrical control compartment on one side and an inverter compartment on the other side. At least one bidirectional inverter is disposed within the inverter compartment; An AC combiner and a liquid-cooled main unit are both located within the electrical control compartment; A liquid cooling pipeline is circulatedly connected to the liquid cooling host, and the liquid cooling pipeline extends to the battery cluster to cool it; The DC side of the bidirectional inverter is electrically connected to the battery cluster; the AC side of the bidirectional inverter, at least one external AC power interface, and at least one external AC load interface are all electrically connected to the AC combiner device.

2. The AC / DC integrated liquid-cooled energy storage container system according to claim 1, characterized in that, The system also includes an air-cooling system, which includes a cooling fan installed on the wall of the inverter compartment for independent ventilation and heat dissipation of the inverter compartment.

3. The AC / DC integrated liquid-cooled energy storage container system according to claim 2, characterized in that, The number of bidirectional inverters is at least two, arranged side by side in the inverter compartment; the cooling fan is installed on the end wall of the inverter compartment away from the battery cluster to form a cooling air duct that runs through the inverter compartment.

4. The AC / DC integrated liquid-cooled energy storage container system according to claim 3, characterized in that, The battery cluster includes multiple battery packs connected in parallel, and the multiple battery packs are divided into at least two DC power supply branches. Each DC power supply branch is connected to the DC side of an independent bidirectional inverter. The AC combiner includes a common AC bus, and the AC sides of all the bidirectional inverters are connected in parallel to the common AC bus. The external AC power interface and the external AC load interface are both connected to the common AC bus.

5. The AC / DC integrated liquid-cooled energy storage container system according to any one of claims 1 to 4, characterized in that, The number of battery clusters is at least two, and they are arranged symmetrically along the width of the container body so that the center of gravity of the container body remains centered.

6. The AC / DC integrated liquid-cooled energy storage container system according to claim 1, characterized in that, The electrical control compartment is also equipped with a control distribution cabinet for centralized control of the system and / or a dehumidifying air conditioner for regulating the humidity inside the compartment.

7. The AC / DC integrated liquid-cooled energy storage container system according to claim 1, characterized in that, The external AC power interface includes an AC mains input interface and / or a photovoltaic input interface; the external AC load interface includes at least one output circuit for connecting an external electrical load.

8. The AC / DC integrated liquid-cooled energy storage container system according to claim 2, characterized in that, The system also includes a fire suppression system, which includes temperature or smoke detectors installed in the space containing the battery clusters, and a fire extinguishing device that is linked to the smoke detector signal; wherein the fire extinguishing device is an aerosol fire extinguishing device; when the smoke detector detects a fire warning signal, the fire suppression system controls the fire extinguishing device to start and also controls the cooling fan of the inverter compartment to stop running.

9. The AC / DC integrated liquid-cooled energy storage container system according to claim 1, characterized in that, The outer wall of the container is also equipped with a manual alarm button, an audible and visual alarm, and a fire inlet and a fire outlet for connecting to an external fire water source.

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