Energy storage device, delivery assembly, and energy storage system

Abstract

The application discloses an energy storage device, a conveying assembly and an energy storage system. The energy storage device comprises an energy storage unit, a thermal management assembly, a conveying assembly and a heating assembly. The thermal management assembly contains a cooling medium. The conveying assembly connects the energy storage unit and the thermal management assembly and is used for conveying the cooling medium. The conveying assembly comprises a conveying pipe and an insulating sleeve. At least part of the length of the conveying pipe is configured as an insulating section along the conveying direction of the conveying pipe. The insulating sleeve is arranged on the outer circumferential side of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. The heating assembly is arranged at the connecting section of the insulating sleeve and the insulating section and is used for connecting the insulating sleeve and the insulating section. The sealed cavity can reduce the heat transfer, thereby reducing the possibility of forming condensate water on the outer circumferences of the insulating section and the insulating sleeve and maintaining the good insulation performance of the two. In addition, the heating assembly makes the sealing performance of the sealed cavity better, thereby making the heat preservation and heat insulation performance better and further reducing the possibility of forming condensate water.

Description

Technical Field

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

[0002] High-voltage energy storage technology applies energy storage units to high-voltage scenarios and has advantages such as high modularity, large capacity and high operational reliability.

[0003] To meet the performance requirements of high-voltage energy storage systems, cooling of the storage units is typically necessary. However, in high-voltage energy storage scenarios, the insulation design of energy storage systems with water circuits presents a significant challenge. Therefore, how to ensure effective cooling of the energy storage device while minimizing the impact of the external environment on its insulation performance is a key research topic in the industry. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides an energy storage device, a transmission component, and an energy storage system with good heat exchange performance and reliable insulation.

[0005] This application is achieved through the following technical solution.

[0006] The first aspect of this application provides an energy storage device, which includes an energy storage unit, a thermal management component, a delivery component, and a heating component. The thermal management component contains a cooling medium. The delivery component connects the energy storage unit and the thermal management component and is used to deliver the cooling medium. The delivery component includes a delivery pipe and an insulating sleeve. Along the delivery direction of the delivery pipe, at least a portion of the length of the delivery pipe constitutes an insulating section. The insulating sleeve is fitted onto the outer periphery of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. The heating component is located at the connection section between the insulating sleeve and the insulating section, and is used to connect the insulating sleeve and the insulating section.

[0007] In this embodiment, the insulating sleeve is fitted onto the outer periphery of the insulating section of the conveying pipe, thereby providing a certain degree of protection for the insulating section and reducing the contact between the outer wall of the insulating section and the external environment. Furthermore, since a sealed cavity is formed between the insulating sleeve and the insulating section, the sealed cavity effectively reduces heat transfer, improves the thermal insulation performance of the insulating section, and thus reduces the possibility of a continuous condensate film forming on the outer periphery of the insulating section or the insulating sleeve, thereby maintaining the insulation effect of both.

[0008] In addition, since the insulating sleeve and the insulating section of this application are sealed together by a heating component, the structure is simple and the sealing effect is better. Therefore, the sealing cavity can have better heat insulation and heat preservation effect, which is conducive to further improving the insulation effect of the insulating section and reducing the possibility of condensation.

[0009] In some embodiments, the heating component is disposed on the inner circumferential side of the insulating sleeve, and the insulating sleeve is thermally fused to the insulating section through the heating component.

[0010] Therefore, a sealed connection between the insulating sleeve and the insulating section can be achieved through a simple structure and a simple power-on operation, resulting in better reliability and sealing performance. Moreover, the heating component is located on the inner circumference of the insulating sleeve, allowing it to directly contact the insulating sleeve and the insulating section during assembly. This directly transfers heat to the insulating sleeve and the insulating section, making it easier for both to reach a molten state and achieve a sealed connection.

[0011] In some embodiments, the insulating sleeve includes a tube body, a first cover, and a second cover; along the conveying direction of the conveying pipe, the first cover is sleeved on the upstream side of the tube body, and the second cover is sleeved on the downstream side of the tube body; the first cover is sealed to the insulating section and the tube body respectively, and the second cover is sealed to the insulating section and the tube body respectively.

[0012] Therefore, the sealing connection between the insulating sleeve and the insulating section can be achieved through the first cover, the second cover, and the tube body, resulting in better assembly flexibility. It eliminates the need to prepare molds for insulating sleeves of various lengths and sizes, thus reducing production costs. When the insulating sleeve is adapted to insulating sections of different lengths, simply cut the tube body to the appropriate length, fit the tube body onto the insulating section, and then connect the first and second covers.

[0013] In some embodiments, along the conveying direction of the conveying pipe, the first cover includes a first end and a second end, the equivalent diameter of the first end being smaller than the equivalent diameter of the second end, the first end being configured as a connecting section, and the second end being sealed to the pipe body; and / or along the conveying direction of the conveying pipe, the second cover includes a third end and a fourth end, the equivalent diameter of the third end being smaller than the equivalent diameter of the fourth end, the third end being configured as a connecting section, and the fourth end being sealed to the pipe body.

[0014] Therefore, a sealed connection between the insulating sleeve and the insulating section can be achieved with a simple structure and method, resulting in better reliability and stability.

[0015] In some embodiments, a heating component is provided on the inner circumferential side of the second end, and the second end is thermally fused to the tube body through the heating component; and / or a heating component is provided on the inner circumferential side of the fourth end, and the fourth end is thermally fused to the tube body through the heating component.

[0016] Therefore, the first cover and the second cover can also be heat-fused to the pipe body through the heating component, thereby improving the sealing and heat preservation performance of the sealing cavity, reducing the possibility of condensation on the surface of the insulating section and the insulating sleeve, and improving the insulation performance of the insulating section and the insulating sleeve.

[0017] In some embodiments, a first water-blocking member is formed on the outer peripheral side of the first cover, and the first water-blocking member extends from the outer peripheral side of the first cover toward a direction away from the first cover along the radial direction of the insulating sleeve; or a first water-blocking member is formed on the outer peripheral side of the second cover, and the first water-blocking member extends from the outer peripheral side of the second cover toward a direction away from the second cover along the radial direction of the insulating sleeve.

[0018] Therefore, when the condensate formed in the upper part of the conveying pipe flows to the insulating section and the insulating sleeve, it will be blocked by the first water-blocking component, thereby reducing the possibility of condensate flowing to the outer periphery of the insulating sleeve and forming a continuous condensate film, which would cause the insulating section and the insulating sleeve to fail to perform their insulating function, thus improving the reliability and stability of the conveying component.

[0019] In some embodiments, the first water-blocking member extends at an angle toward the ground along the direction of gravity.

[0020] Therefore, the first water-blocking component is inclined, and the condensate flowing to the first water-blocking component can drip off through the inclined surface, thereby reducing the possibility of condensate accumulation.

[0021] In some embodiments, the insulating sleeve includes a first segment, a second segment, and a third segment. Along the extension direction of the insulating sleeve, the second segment and the third segment are respectively connected to opposite ends of the first segment. The equivalent diameter of the second segment and the third segment is smaller than the equivalent diameter of the first segment, and the second segment and the third segment are configured as connecting segments. The first segment, the second segment, and the third segment are configured as an integral structural member.

[0022] As a result, the insulating sleeve is formed as an integral structural component with fewer parts, and the assembly steps are simple when it is used with the insulating section, which helps to reduce production and assembly costs.

[0023] In some embodiments, the conveying assembly further includes a second water-blocking member, which is sleeved on the outer periphery of the insulating sleeve; a portion of the second water-blocking member extends from the outer periphery of the insulating sleeve toward a direction away from the insulating sleeve along the radial direction of the insulating sleeve.

[0024] Therefore, when the condensate formed in the upper part of the conveying pipe flows to the insulating section and the insulating sleeve, it will be blocked by the second water-blocking component. This reduces the possibility of condensate flowing to the outer periphery of the insulating sleeve and forming a continuous condensate film, which would prevent the insulating section and the insulating sleeve from performing their insulating function. This improves the reliability and stability of the conveying component.

[0025] In some embodiments, a portion of the second water-blocking member extends at an angle toward the ground along the direction of gravity.

[0026] Therefore, the second water baffle is inclined, and the condensate flowing to the second water baffle can drip off through the inclined surface, thereby reducing the possibility of condensate accumulation.

[0027] In some embodiments, the second water-blocking member includes a connecting portion and a water-blocking portion. The connecting portion is sleeved on the outer periphery of the insulating sleeve, and the water-blocking portion extends in a direction away from the insulating sleeve. A heating component is provided on the side of the connecting portion facing the insulating sleeve, and the connecting portion is thermally fused to the insulating sleeve through the heating component.

[0028] Therefore, the second water-blocking component can be thermally fused with the insulating sleeve through the heating component, resulting in better connection reliability. This makes it less likely for the second water-blocking component to detach from the outer surface of the insulating sleeve, thus better blocking the condensate formed in the upper pipeline of the conveying pipe and making the insulation performance of the insulating section and the insulating sleeve more reliable.

[0029] In some embodiments, the energy storage device further includes a vacuum pumping assembly; a vacuum interface communicating with a sealed cavity is formed on the insulating sleeve, and the vacuum pumping assembly is connected to the vacuum interface, so that the sealed cavity constitutes a vacuum cavity.

[0030] Thermal conduction is the process of transferring heat from a high-temperature area to a low-temperature area, mainly through the vibration and collision of molecules and the movement of free electrons. In a vacuum environment, there are almost no air molecules or other substances present, making heat transfer via thermal conduction very difficult. This reduces thermal conductivity and the heat exchange efficiency between the insulation section 311 and the surrounding environment, thereby effectively reducing the possibility of condensation forming on the surface of the insulation section and the insulation sleeve.

[0031] In some embodiments, the energy storage device further includes a first detection component, an alarm component, and a controller. The first detection component is signal-connected to the controller, and the alarm component is signal-connected to the controller. The detection end of the first detection component is located inside the sealed cavity. The first detection component is used to detect the vacuum level inside the sealed cavity. When the vacuum level detected by the first detection component is lower than a preset vacuum level, the controller controls the alarm component to issue an alarm signal.

[0032] Therefore, the vacuum level inside the sealed cavity can be detected in real time by the first detection component. When the vacuum level inside the sealed cavity is low, an alarm signal is issued, thereby prompting the staff to take timely action to maintain the vacuum level, maintain the heat preservation performance of the sealed cavity, reduce the transfer of cold energy in the insulation section, and reduce the possibility of condensation on the surface of the insulation section and the insulation sleeve.

[0033] In some embodiments, the sealed cavity is filled with insulating and heat-insulating material and / or dry gas.

[0034] Therefore, by filling the sealed cavity with insulating and heat-insulating materials, heat conduction and convection can be reduced, thereby maintaining the thermal insulation performance within the sealed cavity. Alternatively, by filling the sealed cavity with dry gas, the water vapor content within the sealed cavity can be kept as low as possible, thereby reducing the possibility of condensation forming on the insulating section and insulating sleeve, and improving the insulation performance of both.

[0035] In some embodiments, the energy storage device further includes a second detection component, an alarm component, and a controller. The second detection component is signal-connected to the controller, and the alarm component is signal-connected to the controller. The detection end of the second detection component is located inside the sealed cavity. The second detection component is used to detect the humidity inside the sealed cavity. If the humidity detected by the second detection component is higher than a preset humidity, the controller controls the alarm component to issue an alarm signal.

[0036] Therefore, the humidity inside the sealed cavity can be detected in real time by the second detection component. When the humidity inside the sealed cavity is high, an alarm signal is issued, which prompts the staff to take timely action to reduce the humidity inside the sealed cavity, maintain a low water vapor content inside the sealed cavity, and reduce the possibility of condensation on the surface of the insulation section and insulation sleeve.

[0037] In some embodiments, the insulating section is made of polyvinylidene fluoride, and / or the insulating sleeve is made of polyvinylidene fluoride.

[0038] Polyvinylidene fluoride (PVDF) possesses excellent electrical insulation properties, chemical resistance, and superior mechanical properties. It exhibits high tensile strength and impact resistance, enabling it to withstand significant external forces without easily breaking or deforming, making it well-suited for outdoor installation environments. Furthermore, PVDF can be processed using various methods such as injection molding, extrusion, and blow molding, facilitating easy molding.

[0039] In some embodiments, the conveying assembly further includes a first flange assembly and a second flange assembly; along the conveying direction of the conveying pipe, the first flange assembly is connected to the upstream side of the insulating section, and the second flange assembly is connected to the downstream side of the insulating section.

[0040] Therefore, it can be connected to external pipelines and other structures through the first flange assembly and the second flange assembly, which is simple in structure and easy to assemble.

[0041] The second aspect of this application provides a conveying assembly for conveying a cooling medium. The conveying assembly includes a conveying pipe and an insulating sleeve. Along the conveying direction of the conveying pipe, at least a portion of the length of the conveying pipe is configured as an insulating section. The insulating sleeve is fitted onto the outer periphery of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. The insulating sleeve and the insulating section are sealed together by a heating assembly.

[0042] Therefore, the sealed cavity can effectively reduce heat transfer and improve the thermal insulation performance of the insulation section, thereby reducing the possibility of forming a continuous condensate film on the outer periphery of the insulation section or insulation sleeve, and thus maintaining the insulation effect of both.

[0043] In some embodiments, the insulating sleeve includes a tube body, a first cover, and a second cover; along the conveying direction of the conveying pipe, the first cover is sleeved on the upstream side of the tube body, and the second cover is sleeved on the downstream side of the tube body; the first cover is sealed to the insulating section and the tube body respectively, and the second cover is sealed to the insulating section and the tube body respectively.

[0044] Therefore, the sealing connection between the insulating sleeve and the insulating section can be achieved through the first cover, the second cover, and the tube body, which provides better assembly flexibility and eliminates the need to prepare molds for insulating sleeves of various lengths and sizes, thus helping to reduce production costs.

[0045] In some embodiments, a first water-blocking member is formed on the outer peripheral side of the first cover, and the first water-blocking member extends from the outer peripheral side of the first cover toward a direction away from the first cover along the radial direction of the insulating sleeve; or a first water-blocking member is formed on the outer peripheral side of the second cover, and the first water-blocking member extends from the outer peripheral side of the second cover toward a direction away from the second cover along the radial direction of the insulating sleeve.

[0046] Therefore, when the condensate formed in the upper part of the conveying pipe flows to the insulating section and the insulating sleeve, it will be blocked by the first water-blocking component, thereby reducing the possibility of condensate flowing to the outer periphery of the insulating sleeve and forming a continuous condensate film, which would cause the insulating section and the insulating sleeve to fail to perform their insulating function, thus improving the reliability and stability of the conveying component.

[0047] In some embodiments, the insulating sleeve includes a first section, a second section, and a third section. Along the extension direction of the insulating sleeve, the second section and the third section are respectively connected to the opposite ends of the first section, and the first section, the second section, and the third section constitute an integral structural member.

[0048] As a result, the insulating sleeve is formed as an integral structural component with fewer parts, and the assembly steps are simple when it is used with the insulating section, which helps to reduce production and assembly costs.

[0049] A third aspect of this application provides an energy storage system, which includes a power conversion device and an energy storage device according to the first aspect of this application; wherein the power conversion device is electrically connected to a power generation device and an energy storage device.

[0050] Therefore, the insulation section of the delivery pipe used to transport the cooling medium in the energy storage device is less prone to condensation, thus maintaining good insulation performance and improving the reliability of the energy storage system.

[0051] Utility Model Effect

[0052] The energy storage device, transmission component, and energy storage system of the present application have good heat exchange performance, and the outer periphery of the insulation section of the transmission component is not prone to condensation, thereby maintaining good insulation effect. Attached Figure Description

[0053] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0054] Figure 1 Schematic diagrams of the energy storage device provided for some embodiments of this application;

[0055] Figure 2 A partial structural schematic diagram of a conveying assembly provided for some embodiments of this application;

[0056] Figure 3 for Figure 2 AA section view in the middle;

[0057] Figure 4 for Figure 3 Enlarged view of part B in the image;

[0058] Figure 5 Partial structural schematic diagrams of the conveying assembly provided for other embodiments of this application;

[0059] Figure 6 for Figure 5 CC section view.

[0060] Explanation of reference numerals in the attached figures

[0061] 1. Energy storage unit; 11. Battery device; 2. Thermal management component; 3. Conveying component; 31. Conveying pipe; 31a. Pipe cavity; 311. Insulating section; 32. Insulating sleeve; 320. Pipe body; 321. First cover; 321a. First end; 321b. Second end; 322. Second cover; 322a. Third end; 322b. Fourth end; 323. First section; 324. Second section; 325. Third section; 4. Heating component; 5. First water baffle; 6. Second water baffle; 61. Connecting part; 62. Water baffle; 7. First detection component; 8. Second detection component; 91. First flange assembly; 92. Second flange assembly; 10. Sealing cavity; 20. Insulating and heat-insulating material; 100. Energy storage device. Detailed Implementation

[0062] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0064] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0065] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0067] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", 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 the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0068] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0069] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0070] The following is a detailed description of this application.

[0071] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0072] High-voltage direct-connected energy storage technology connects energy storage devices directly to the high-voltage power grid, enabling bidirectional energy flow through power electronic converters. This technology eliminates the need for traditional transformer step-up or step-down stages, reducing losses during energy conversion and improving system efficiency. Simultaneously, high-voltage direct-connected energy storage technology allows for rapid response and precise control of the energy storage devices, enhancing system reliability and stability. Unlike low-voltage energy storage converters, high-voltage direct-connected (cascaded) energy storage converters do not require step-up transformers, resulting in higher system efficiency. They also have shorter electrical distances from the grid and provide better voltage support during transient processes, making them the optimal platform for grid-connected technology.

[0073] Here, high-voltage energy storage technology applies energy storage devices to high-voltage scenarios, offering advantages such as high modularity, large capacity, and high operational reliability. High-voltage direct-connect energy storage technology integrates a voltage source converter, converter valve, and DC energy storage valve into a high-voltage direct-connect energy storage valve, also boasting high modularity and operational reliability. Typically, a high-voltage direct-connect energy storage valve can include multiple energy storage components, which may include, but are not limited to, power modules and battery modules. During the operation of the high-voltage direct-connect energy storage valve, each power module and battery module generates heat; therefore, a cooling system for the energy storage valve needs to be designed to dissipate this heat.

[0074] Furthermore, due to the high voltage operating in high-voltage energy storage systems (e.g., 35 kV or higher), insufficient insulation can easily lead to leakage or short circuits, causing equipment damage or safety accidents. Because the cooling medium is at a low temperature, the heat carried away by the delivery pipe during transport causes its outer surface temperature to drop. When the pipe temperature reaches the dew point, water vapor in the air condenses upon contact with the cold pipe wall, forming condensate on the surface. Alternatively, in environments with high relative humidity, even if the pipe's outer surface temperature doesn't fully reach the dew point, significant water vapor condenses, forming condensate on the pipe wall. If the amount of condensate is large, forming a continuous condensate film on the outer surface of the delivery pipe, it can negatively impact its insulation performance.

[0075] In related technologies, waterproof and thermal insulation layers are typically wrapped around the outside of the conveying pipe. However, because these layers are in direct contact with the external environment, they are prone to aging and peeling over time. Furthermore, under extreme conditions, cracks can easily appear, allowing outside air to easily enter the pipe and cause condensation, thus affecting its insulation performance. Additionally, covering the entire conveying pipe with waterproof and thermal insulation layers is costly, complex to assemble, and inconvenient for later maintenance.

[0076] This application addresses the problems existing in the aforementioned related technologies by proposing an energy storage device comprising an energy storage unit, a thermal management component, a delivery component, and a heating component. The thermal management component internally contains a cooling medium. The delivery component connects the energy storage unit and the thermal management component, and is used to deliver the cooling medium. The delivery component includes a delivery pipe and an insulating sleeve. Along the delivery direction of the delivery pipe, at least a portion of the length of the delivery pipe constitutes an insulating section. The insulating sleeve is fitted onto the outer periphery of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. The heating component is located at the connection section between the insulating sleeve and the insulating section, and is used to connect the insulating sleeve and the insulating section.

[0077] In this embodiment, the insulating sleeve is fitted onto the outer periphery of the insulating section of the conveying pipe, thereby providing a certain degree of protection for the insulating section and reducing the contact between the outer wall of the insulating section and the external environment. Furthermore, since a sealed cavity is formed between the insulating sleeve and the insulating section, the sealed cavity effectively reduces heat transfer, improves the thermal insulation performance of the insulating section, and thus reduces the possibility of a continuous condensate film forming on the outer periphery of the insulating section or the insulating sleeve, thereby maintaining the insulation effect of both.

[0078] In addition, since the insulating sleeve and the insulating section of this application are sealed together by a heating component, the structure is simple and the sealing effect is better, which enables the sealed cavity to have a better heat insulation effect, thereby helping to further improve the insulation effect of the insulating section and reduce the possibility of condensation.

[0079] Below, refer to Figures 1 to 6 Some embodiments of this application will be described in detail.

[0080] Figure 1 Schematic diagrams of the energy storage device provided for some embodiments of this application; Figure 2 A partial structural schematic diagram of a conveying assembly provided for some embodiments of this application; Figure 3 for Figure 2 AA section view in the middle;

[0081] Figure 4 for Figure 3 Enlarged view of part B in the image; Figure 5 Partial structural schematic diagrams of the conveying assembly provided for other embodiments of this application; Figure 6 for Figure 5 CC section view.

[0082] like Figure 1 As shown, the first aspect of this application provides an energy storage device 100, which includes an energy storage unit 1, a thermal management component 2, a delivery component 3, and a heating component 4. The thermal management component 2 contains a cooling medium. The delivery component 3 connects the energy storage unit 1 and the thermal management component 2 and is used to deliver the cooling medium. The delivery component 3 includes a delivery pipe 31 and an insulating sleeve 32. Along the delivery direction of the delivery pipe 31, at least a portion of the length of the delivery pipe 31 is configured as an insulating section 311. The insulating sleeve 32 is sleeved on the outer periphery of the insulating section 311, and a sealing cavity 10 is formed between the insulating sleeve 32 and the insulating section 311. The heating component 4 is disposed at the connection section between the insulating sleeve 32 and the insulating section 311 and is used to connect the insulating sleeve 32 and the insulating section 311.

[0083] The energy storage device 100 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. The energy storage device 100 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 100 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0084] The energy storage unit 1 of the energy storage device 100 may include one or more battery clusters to increase the voltage and capacity of the energy storage unit 1. A battery cluster may include multiple battery devices 11, which are connected in series via a busbar to increase the voltage of the energy storage device 100. When the energy storage unit 1 includes multiple battery clusters, the battery clusters may be connected in parallel to increase the capacity of the energy storage unit 1.

[0085] The battery device 11 may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0086] In some embodiments, the energy storage device 100 may include a thermal management component 2, a main control module, a central control module, a power distribution module, and a fire protection module, etc.

[0087] As an example, the thermal management component 2 may include a liquid cooling unit, the interior of which contains a cooling medium. The liquid cooling unit supplies the cooling medium for regulating the temperature of the individual battery cells to each battery device 11 via a delivery component 3.

[0088] Cooling media include, but are not limited to, liquid cooling media, oil cooling media, and gaseous cooling media. In the embodiments of this application, in order to enable adjacent energy storage units 1 in the energy storage system to have different potentials, the coolant can be a non-conductive liquid with insulating properties, such as deionized water, transformer oil, or fluorinated liquid.

[0089] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0090] As an example, the central control module can serve as the battery management unit of the energy storage device 100, used to monitor and manage the energy storage device 100. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 100. For example, it can control the charging and discharging current and voltage of the energy storage device 100. As an example, the central control module includes an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0091] As an example, the fire protection module may include a control panel, detectors, alarm devices, etc., for detecting, alarming or extinguishing the energy storage device 100.

[0092] As an example, the power distribution module can be used to distribute power to the power consumption modules of the energy storage device 100.

[0093] The structure of the conveying component 3 will be described in detail below.

[0094] The delivery assembly 3 connects the energy storage unit 1 and the thermal management assembly 2, and is used to deliver the cooling medium. For example... Figure 2 and Figure 5 As shown, the delivery assembly 3 includes a delivery pipe 31 and an insulating sleeve 32. The delivery pipe 31 has a cavity 31a inside, which is connected to the storage cavity of the thermal management assembly 2 for storing the cooling medium and the cooling cavity of the cooling pipe in the energy storage unit 1, thereby cooling and exchanging heat for the battery device 11 in the energy storage unit 1.

[0095] The delivery pipe 31 may include, for example, an inlet pipe and an outlet pipe. The cooling medium in the thermal management component 2 flows into the energy storage unit 1 through the inlet pipe, completes heat exchange in the energy storage unit 1, and then flows back to the thermal management component 2 through the outlet pipe. Thus, the heat generated by the battery device 11 can be continuously carried away by the circulating cooling medium, thereby improving the heat exchange effect and enabling the energy storage unit 1 to be maintained in a relatively stable temperature range.

[0096] This application embodiment does not specifically limit the extension direction of the delivery pipe 31, but can make specific settings according to the structure to be connected.

[0097] In this embodiment, the energy storage device 100 is applied to a high-voltage direct-connected energy storage system. When the energy storage device 100 is located on a valve tower, the thermal management component 2 can be a cooling valve tower. A valve tower refers to a structure used to support the high-voltage equipment in the energy storage device 100 and insulate it from the ground. To ensure the safe and stable operation of the entire high-voltage energy storage system, the delivery component 3 for conveying the cooling medium needs to be insulated from the ground to prevent current from leaking to the ground through the delivery component 3.

[0098] Therefore, as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, at least a portion of the length of the delivery pipe 31 of the delivery assembly 3 of this application is configured as an insulating section 311. The insulating section 311 of the delivery pipe 31 can be made of a material that has insulation properties and can maintain good performance and stability under high load and high pressure, thereby maintaining the safe and stable operation of the entire energy storage system.

[0099] For example, the insulating segment 311 is made of polyvinylidene fluoride (PVDF).

[0100] Polyvinylidene fluoride (PVDF) possesses excellent electrical insulation properties, chemical resistance, and superior mechanical properties. It exhibits high tensile strength and impact resistance, enabling it to withstand significant external forces without easily breaking or deforming, making it well-suited for outdoor installation environments. Furthermore, PVDF can be processed using various methods such as injection molding, extrusion, and blow molding, facilitating easy molding.

[0101] Of course, those skilled in the art will understand that in some other embodiments, the insulating segment 311 may also be made of any other suitable material, such as polyamide (PA).

[0102] Along the conveying direction of the conveying pipe 31, the entire length of the conveying pipe 31 can be configured as an insulating section 311, or only a portion of its length can be configured as an insulating section 311. When only a portion of the conveying pipe 31 is configured as an insulating section 311, the number of insulating sections 311 can be one or more (two or more). When there are multiple insulating sections 311, these sections can be arranged at intervals, thereby reducing the possibility of the entire conveying assembly 3 failing in insulation performance due to the failure of insulation performance of some insulating sections 311.

[0103] In this embodiment, a portion of the length of the conveying pipe 31 is configured as an insulating section 311, while the remaining length is made of metal material. This allows for the reduction of the manufacturing cost of the conveying component 3 while maintaining its insulation performance.

[0104] For example, the length of the insulating segment 311 can be in the range of 0.5m to 1m.

[0105] Since the conveying pipe 31 is used to transport the cooling medium, and the temperature of the cooling medium is low, water vapor from the outside will easily condense upon contact with the low-temperature conveying pipe 31, forming condensate on the outer surface of the conveying pipe 31. If the amount of condensate formed is large, a continuous water film will form on the surface of the insulating section 311, creating a conductive circuit. This will cause the insulation of the insulating section 311 of the conveying pipe 31 to fail, potentially leading to a short circuit in the energy storage device 100 and posing a significant safety hazard.

[0106] Therefore, the conveying assembly 3 in this embodiment further includes an insulating sleeve 32, which is sleeved on the outer periphery of the insulating section 311, and a portion of the insulating sleeve 32 is spaced apart from the insulating section 311, thereby forming a sealed cavity 10 between the insulating sleeve 32 and the insulating section 311. On the one hand, the insulating sleeve 32 can provide a certain degree of protection for the insulating section 311, reducing the contact between the outer wall of the insulating section 311 and the external environment, thereby reducing the possibility of damage to the insulating section 311, reducing the possibility of leakage of the cooling medium, and maintaining good insulation performance of the insulating section 311. On the other hand, the sealed cavity 10 can effectively reduce heat transfer, improve the heat preservation performance of the insulating section 311, thereby reducing the possibility of forming a continuous condensate film on the outer periphery of the insulating section 311 or the insulating sleeve 32, and thus ensuring that the conveying assembly 3 has good insulation performance.

[0107] For example, along the conveying direction of the conveying pipe 31, the length of the insulating sleeve 32 can be the same as the length of the insulating section 311, that is, the insulating section 311 is completely inserted inside the insulating sleeve 32.

[0108] As another example, along the conveying direction of the conveying pipe 31, the length of the insulating sleeve 32 may be less than the length of the insulating section 311, that is, part of the insulating section 311 is inserted into the insulating sleeve 32.

[0109] This application does not specifically limit the length of the insulating sleeve 32, as long as the surface of the conveying pipe 31 does not form a continuous condensate film.

[0110] In this embodiment, the insulating sleeve 32 is made of polyvinylidene fluoride (PVDF). In some other embodiments, the insulating sleeve 32 may also be made of any other suitable insulating material.

[0111] The cross-sectional shape of the insulating sleeve 32 can be the same as or different from that of the conveying pipe 31.

[0112] For example, in this embodiment, the cross-sections of the insulating sleeve 32 and the conveying pipe 31 are both circular, and the conveying pipe 31 and the insulating sleeve 32 are generally cylindrical. In some other embodiments, the cross-sections of the insulating sleeve 32 and the conveying pipe 31 may also be square, rectangular, or any other suitable shape.

[0113] In this embodiment, the insulating sleeve 32 and the insulating section 311 of the conveying pipe 31 are thermally fused together by the heating assembly 4. Thermal fusion connection refers to a connection method in which two structural components are fused together after being heated to their (liquid) melting point. The connection formed by the thermal fusion of the insulating sleeve 32 and the insulating section 311 has good connection rigidity, which can effectively reduce the problem of the insulating sleeve 32 detaching and falling off, and the connection stability is better.

[0114] In addition, the sealing connection between the insulating sleeve 32 and the insulating section 311 achieved by the heating component 4 has a simple structure and can eliminate the sealing interface between the insulating sleeve 32 and the insulating section 311, resulting in a better sealing effect. This can further reduce the possibility of leakage in the sealing cavity 10, thereby giving the sealing cavity 10 a better heat insulation effect. It also makes it more difficult for external water vapor to enter the sealing cavity 10, reducing the possibility of condensation forming in the insulating section 311, which is conducive to further improving the insulation effect of the insulating section 311.

[0115] Heating component 4 is disposed at the connection section between insulating sleeve 32 and insulating section 311. Heating component 4 may be, for example, an electric heating wire. When energized, the electric heating wire generates heat, causing the connection section between insulating sleeve 32 and insulating section 311 to partially melt and fuse together. The connection section between insulating sleeve 32 and insulating section 311 refers to the section where insulating sleeve 32 and insulating section 311 are in contact with each other.

[0116] The heating component 4 can be disposed on the insulating section 311 or on the insulating sleeve 32. As long as the heat fusion connection between the insulating sleeve 32 and the insulating section 311 can be achieved, the specific placement position of the heating component 4 is not specifically limited in this embodiment.

[0117] In some embodiments of this application, such as Figure 4 As shown, the heating component 4 is located on the inner circumference of the insulating sleeve 32, and the insulating sleeve 32 is thermally fused to the insulating section 311 through the heating component 4.

[0118] The heating component 4 is pre-installed on the inner circumference of the insulating sleeve 32, and a lead-out end is provided. After the insulating sleeve 32 is fitted onto the outer circumference of the insulating section 311, the heating component 4 is energized through the lead-out end. After the heating component 4 is energized, it heats up, thereby realizing the thermal fusion connection between the insulating sleeve 32 and the insulating section 311.

[0119] Therefore, a sealed connection between the insulating sleeve 32 and the insulating section 311 can be achieved through a simple structure and a simple power-on operation, resulting in better reliability and sealing performance.

[0120] Furthermore, the heating component 4 is located on the inner circumference of the insulating sleeve 32. During assembly, the heating component 4 can directly contact the insulating sleeve 32 and the insulating section 311, thereby directly transferring heat to the insulating sleeve 32 and the insulating section 311, making it easier for the two to reach a molten state and achieve a sealed connection.

[0121] In some other embodiments, the heating component 4 may also be disposed on the outer periphery of the insulating sleeve 32 or on the outer periphery of the insulating section 311, as long as the insulating sleeve 32 and the insulating section 311 can be thermally fused together.

[0122] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, the insulating sleeve 32 includes a tube body 320, a first cover 321, and a second cover 322. Along the conveying direction of the conveying pipe 31, the first cover 321 is fitted onto the upstream side of the tube body 320, and the second cover 322 is fitted onto the downstream side of the tube body 320. The first cover 321 is sealed to both the insulating section 311 and the tube body 320, and the second cover 322 is sealed to both the insulating section 311 and the tube body 320.

[0123] Therefore, the sealing connection between the insulating sleeve 32 and the insulating section 311 can be achieved through the first cover 321, the second cover 322 and the tube body 320, resulting in better assembly flexibility.

[0124] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown in the figure, X represents the conveying direction of the conveying pipe 31. Along the conveying direction of the conveying pipe 31, the upstream side refers to the side from which the cooling medium comes, and the downstream side refers to the side from which the cooling medium goes.

[0125] The first cover 321, the second cover 322, and the tube body 320 can be processed by various methods such as injection molding, extrusion, and blow molding. The structures of the first cover 321 and the second cover 322 can be the same or different.

[0126] The first cover 321, the second cover 322, and the tube body 320 can all be manufactured as general-purpose components. This eliminates the need to manufacture multiple insulating sleeves 32 of different lengths when the insulating sleeve 32 is adapted to insulating sections 311 of different lengths. In other words, it avoids the need for separate molds to manufacture insulating sleeves 32 to fit different lengths of insulating sections 311, thus reducing production costs. When the insulating sleeve 32 is adapted to insulating sections 311 of different lengths, simply cut the length of the tube body 320 according to the actual situation, fit the tube body 320 onto the insulating section 311, and then connect the first cover 321 and the second cover 322.

[0127] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, along the conveying direction of the conveying pipe 31, the first cover 321 includes a first end 321a and a second end 321b. The equivalent diameter of the first end 321a is smaller than the equivalent diameter of the second end 321b. The first end 321a is configured as a connecting section, and the second end 321b is sealed to the pipe body 320. And / or along the conveying direction of the conveying pipe 31, the second cover 322 includes a third end 322a and a fourth end 322b. The equivalent diameter of the third end 322a is smaller than the equivalent diameter of the fourth end 322b. The third end 322a is configured as a connecting section, and the fourth end 322b is sealed to the pipe body 320.

[0128] Along the conveying direction of the conveying pipe 31, the first end 321a is located on the upstream side of the first cover 321, the second end 321b is located on the downstream side of the first cover 321, the third end 322a is located on the upstream side of the second cover 322, and the fourth end 322b is located on the downstream side of the second cover 322.

[0129] The tube body 320 is inserted into the second end 321b and the fourth end 322b at both ends along the conveying direction. The first end 321a and the third end 322a are respectively configured as connecting sections, which mate with the outer surface of the insulating section 311 of the conveying tube 31. The heating assembly 4 is disposed on the inner surface of the first end 321a and the third end 322a, thereby realizing the thermal fusion connection between the first end 321a and the third end 322a and the insulating section 311.

[0130] Therefore, a sealed connection between the insulating sleeve 32 and the insulating section 311 can be achieved with a simple structure and method, resulting in better reliability and stability.

[0131] The equivalent diameter refers to the diameter of a non-circular flow channel whose cross-section is equivalent to that of a circular cross-section with the same hydraulic characteristics.

[0132] In this embodiment, the equivalent diameters of the first end 321a and the third end 322a are slightly larger than the equivalent diameter of the insulating section 311. Therefore, when the first cover 321 and the second cover 322 are fitted onto the outer periphery of the insulating section 311, they can remain at the target position after the movement without affecting the position movement, that is, the position where heat fusion connection is required, which helps to improve the positioning accuracy and reduce the assembly difficulty.

[0133] The equivalent diameters of the second end 321b and the fourth end 322b are slightly larger than the equivalent diameter of the tube body 320. This facilitates the insertion and mating of the tube body 320 with the first cover 321 and the second cover 322, resulting in a better mating effect.

[0134] Of course, those skilled in the art should understand that in some other embodiments, the second end 321b of the first cover 321 and / or the fourth end 322b of the second cover 322 may extend into the tube body 320 to engage with the tube body 320.

[0135] This application does not limit the method of sealing the second end 321b and the fourth end 322b with the tube body 320. For example, a sealing connection can be made using a sealing element, or a heat-fusion sealing connection can be made using the heating assembly 4. The sealing connection method between the second end 321b and the tube body 320 can be the same as or different from the sealing connection method between the fourth end 322b and the tube body 320, as long as the sealing cavity 10 can have a good sealing effect.

[0136] In some embodiments of this application, such as Figure 3 As shown, a heating component 4 is provided on the inner circumference side of the second end 321b, and the second end 321b is thermally fused to the tube body 320 through the heating component 4, and / or a heating component 4 is provided on the inner circumference side of the fourth end 322b, and the fourth end 322b is thermally fused to the tube body through the heating component 4.

[0137] Therefore, the first cover 321 and the second cover 322 can also be heat-fused to the tube body 320 through the heating component 4, thereby improving the sealing and heat preservation performance of the sealing cavity 10, thereby reducing the possibility of condensation forming on the surface of the insulating section 311 and the insulating sleeve 32, and improving the insulation performance of the insulating section 311 and the insulating sleeve 32.

[0138] Of course, those skilled in the art should understand that in some other embodiments, the second end 321b and the fourth end 322b may also be sealed to the tube body 320 by any other suitable means.

[0139] In some embodiments of this application, a first water-blocking member 5 is formed on the outer peripheral side of the first cover 321, and the first water-blocking member 5 extends from the outer peripheral side of the first cover 321 toward a direction away from the first cover 321 along the radial direction of the insulating sleeve 32; or, a first water-blocking member 5 is formed on the outer peripheral side of the second cover 322, and the first water-blocking member 5 extends from the outer peripheral side of the second cover 322 toward a direction away from the second cover 322 along the radial direction of the insulating sleeve 32.

[0140] like Figure 2 and Figure 3 As shown in this embodiment, the inlet pipe of the conveying assembly 3 conveys the cooling medium to the energy storage unit 1 from low to high, and the insulating section 311 of the conveying pipe 31 is arranged vertically. Therefore, along the direction of gravity, the downstream side of the conveying pipe 31 is located above the upstream side, and the first water-blocking member 5 is formed on the outer periphery of the second cover 322.

[0141] As mentioned earlier, not the entire length of the conveying pipe 31 is fitted with an insulating sleeve 32. Therefore, condensation may still occur on the surface of the pipe sections of the conveying pipe 31 that are not fitted with insulating sleeves 32. If a large amount of condensation forms in the section above the insulating section 311, it may flow down the pipe to the insulating sleeve 32, potentially forming a conductive loop on the outer surface of the insulating sleeve 32 and causing the insulating performance of the insulating sleeve 32 to fail.

[0142] In this embodiment, a first water-blocking member 5 is formed on the outer periphery of the second cover 322. Therefore, when the condensate formed by the upper conveying pipe 31 flows to the insulating section 311 and the insulating sleeve 32, it will be blocked by the first water-blocking member 5. This reduces the possibility of the condensate flowing to the outer periphery of the insulating sleeve 32 and forming a continuous condensate film, which would cause the insulating section 311 and the insulating sleeve 32 to fail to perform their insulating function. This improves the reliability and stability of the conveying assembly 3.

[0143] Those skilled in the art should understand that in some other embodiments, the conveying assembly 3 can also convey the cooling medium from high to low, that is, the upstream side of the conveying assembly 3 is located above the downstream side, for example, the liquid outlet pipe of the conveying pipe 31 in this application embodiment. In this case, the first water-blocking member 5 can be formed on the outer periphery of the first cover 321. This application embodiment does not specifically limit the formation position of the first water-blocking member 5, as long as it can prevent the condensate formed on the pipe surface above the insulating section 311 of the conveying pipe 31 from flowing to the outer periphery of the insulating section 311 and the insulating sleeve 32 to form a continuous condensate film.

[0144] The first water-blocking member 5 extends along the entire circumference of the outer periphery of the first cover 321 or the second cover 322, that is, the first water-blocking member 5 is formed along the entire circumference of the outer periphery of the first cover 321 or the second cover 322. The first water-blocking member 5 can be formed as an integral structural component with the first cover 321 or the second cover 322, or it can be a separate structure and then assembled together.

[0145] In this embodiment, the first water-blocking component 5 is made of PVDF material.

[0146] In some embodiments of this application, the first water-blocking member 5 extends at an angle toward the ground along the direction of gravity.

[0147] Therefore, the first water-blocking component 5 is inclined downward along the direction of gravity, so that the condensate flowing from the upper pipe to the first water-blocking component 5 can drip off through the inclined surface, thereby reducing the possibility of condensate accumulation.

[0148] In some embodiments, the outer surface of the first water-blocking member 5 may be coated with a hydrophobic coating to further reduce the possibility of condensate buildup.

[0149] In some embodiments of this application, such as Figure 5 and Figure 6 As shown, the insulating sleeve 32 includes a first section 323, a second section 324, and a third section 325. Along the extending direction of the insulating sleeve 32, the second section 324 and the third section 325 are respectively connected to the opposite ends of the first section 323. The equivalent diameter of the second section 324 and the third section 325 is smaller than the equivalent diameter of the first section 323, and the second section 324 and the third section 325 constitute a connecting section. The first section 323, the second section 324, and the third section 325 constitute an integral structural component.

[0150] Therefore, the insulating sleeve 32 is formed as an integral structural component with fewer parts. Furthermore, when the insulating sleeve 32 is fitted with the insulating section 311, the integral insulating sleeve 32 can be directly fitted onto the outer periphery of the insulating section 311 and then sealed. The assembly steps are simple, which helps to reduce production and assembly costs.

[0151] The equivalent diameter of the first segment 323 is larger than that of the insulating segment 311. After the insulating sleeve 32 is fitted onto the outer periphery of the insulating segment 311, the first segment 323 and the insulating segment 311 are arranged at intervals, thereby forming a sealed cavity 10 between them. The equivalent diameters of the second segment 324 and the third segment 325 are smaller than the diameter of the first segment 323 and slightly larger than the equivalent diameter of the insulating segment 311, thereby enabling a more convenient sealed connection between the second segment 324 and the third segment 325 and the insulating segment 311.

[0152] Heating component 4 is formed on the inner circumferential side of the second section 324 and the third section 325.

[0153] In some embodiments of this application, the conveying assembly 3 further includes a second water-blocking member 6, which is sleeved on the outer periphery of the insulating sleeve 32. Along the radial direction of the insulating sleeve 32, a portion of the second water-blocking member 6 extends from the outer periphery of the insulating sleeve 32 toward a direction away from the insulating sleeve 32.

[0154] Therefore, when the condensate formed in the upper part of the conveying pipe 31 flows to the insulating section 311 and the insulating sleeve 32, it will be blocked by the second water-blocking component 6, thereby reducing the possibility of the condensate flowing to the outer periphery of the insulating sleeve 32 and forming a continuous condensate film, which would cause the insulating section 311 and the insulating sleeve 32 to fail to perform their insulating function, thus improving the reliability and stability of the conveying component 3.

[0155] In this embodiment, the second water-blocking member 6 is disposed near the downstream side of the insulating sleeve 32. In some other embodiments, the second water-blocking member 6 may also be disposed at any other suitable location on the insulating sleeve 32. This embodiment does not specifically limit the placement of the second water-blocking member 6 on the insulating sleeve 32, as long as it ensures that condensate does not form a continuous condensate film on the outer periphery of the insulating sleeve 32.

[0156] For example, the second water-blocking member 6 can be formed as an integral structural member with the insulating sleeve 32, or it can be a separate structure and then assembled together.

[0157] In this embodiment, the second water-blocking element 6 is made of PVDF material.

[0158] In some embodiments of this application, a portion of the second water-blocking member 6 extends at an angle toward the ground along the direction of gravity.

[0159] Therefore, the second water-blocking component 6 is inclined downwards, and the condensate flowing to the second water-blocking component 6 can drip off through the inclined surface, thereby reducing the possibility of condensate accumulation.

[0160] In some embodiments, the outer surface of the second water-blocking member 6 may be coated with a hydrophobic coating to further reduce the possibility of condensate buildup.

[0161] In some embodiments of this application, the second water-blocking member 6 includes a connecting portion 61 and a water-blocking portion 62. The connecting portion 61 is sleeved on the outer periphery of the insulating sleeve 32, and the water-blocking portion 62 extends in a direction away from the insulating sleeve 32. A heating component 4 is provided on the side of the connecting portion 61 facing the insulating sleeve 32, and the connecting portion 61 is thermally fused to the insulating sleeve 32 through the heating component 4.

[0162] Therefore, the second water-blocking component 6 and the insulating sleeve 32 are separate structures, which allows for better assembly flexibility. The position of the second water-blocking component 6 on the insulating sleeve 32 can be adjusted according to the actual situation, and the second water-blocking component 6 can be connected to the outer periphery of the insulating sleeve 32 after the position is determined.

[0163] In addition, the second water-blocking component 6 can be thermally fused with the insulating sleeve 32 by the heating component 4 of the connection part 61, which improves the connection reliability and makes it less likely for the second water-blocking component 6 to fall off the outer surface of the insulating sleeve 32. This better blocks the condensate formed in the upper pipeline of the delivery pipe 31, making the insulation performance of the insulating section 311 and the insulating sleeve 32 more reliable, thereby improving the stability and reliability of the entire energy storage device 100.

[0164] Of course, those skilled in the art should understand that in some other embodiments, the second water-blocking member 6 may also be connected to the outer periphery of the insulating sleeve 32 by any other suitable means such as adhesive bonding.

[0165] In some embodiments of this application, the energy storage device 100 further includes a vacuum pumping assembly. A vacuum interface communicating with the sealed cavity 10 is formed on the insulating sleeve 32, and the vacuum pumping assembly is connected to the vacuum interface, so that the sealed cavity 10 is configured as a vacuum cavity.

[0166] Thermal conduction is the process of transferring heat from a high-temperature area to a low-temperature area, mainly through the vibration and collision of molecules and the movement of free electrons. However, in a vacuum environment, there are almost no air molecules or other substances present, making heat transfer via thermal conduction extremely difficult. In this embodiment, the sealed cavity 10 is configured as a vacuum cavity using a vacuum extraction assembly, which helps reduce the thermal conductivity of the insulating section 311, thereby reducing the heat exchange efficiency between the insulating section 311 and the surrounding environment, and effectively reducing the possibility of condensation forming on the surfaces of the insulating section 311 and the insulating sleeve 32.

[0167] This application does not specifically limit the type of vacuum pumping component; any suitable commercially available vacuum pumping component can be used.

[0168] In some embodiments of this application, the energy storage device 100 further includes a first detection component 7, an alarm component, and a controller. The first detection component 7 is signal-connected to the controller, and the alarm component is also signal-connected to the controller. The detection end of the first detection component 7 is located inside the sealed cavity 10. The first detection component 7 is used to detect the vacuum level inside the sealed cavity 10. If the vacuum level detected by the first detection component 7 is lower than a preset vacuum level, the controller controls the alarm component to issue an alarm signal.

[0169] The first detection component 7 is a detection component capable of detecting the vacuum level inside the sealed cavity 10. Thus, the vacuum level inside the sealed cavity 10 can be detected in real time through the first detection component 7. When the vacuum level inside the sealed cavity 10 is low, an alarm signal is issued, thereby prompting the staff to take timely action to maintain the vacuum level inside the sealed cavity 10, maintain the heat preservation performance of the sealed cavity 10, reduce the transfer of cold energy in the insulation section 311, and reduce the possibility of condensation on the surface of the insulation section 311 and the insulation sleeve 32.

[0170] The first detection component 7 can be, for example, a vacuum gauge, a vacuum degree detector, a pressure gauge, etc. This application embodiment does not specifically limit the type of the first detection component 7; any suitable commercially available detection component can be used, as long as it can detect the vacuum degree within the sealed cavity 10.

[0171] Signal connections include, but are not limited to, electrical connections, Bluetooth connections, antenna signal connections, or WiFi connections. This application does not specifically limit the signal connection method between the first detection component 7, the alarm component, and the controller, as long as information transmission is possible.

[0172] The alarm signals emitted by the alarm component include, but are not limited to, visual alarm signals such as flashing indicator lights, audible alarm signals such as sound alarms, or alarm abnormality prompts that pop up on the host computer.

[0173] In some embodiments of this application, such as Figure 6 As shown, the sealed cavity 10 is filled with insulating and heat-insulating material 20 and / or dry gas.

[0174] Therefore, by filling the sealed cavity 10 with insulating and heat-insulating material 20, heat conduction and heat convection can be reduced, thereby maintaining the heat insulation performance of the sealed cavity 10 and reducing the possibility of condensation forming on the outer surface of the insulating section 311 and the insulating sleeve 32.

[0175] For example, porous materials can be selected as the insulating and heat-insulating material 20. On the one hand, porous materials contain a large number of tiny pores, which can be filled with air or other gases. Gases typically have low thermal conductivity, thus helping to reduce heat transfer efficiency. On the other hand, porous materials are lightweight and have relatively stable heat insulation performance. Their internal pore structure is not easily destroyed, thus enabling them to continuously perform their heat insulation function. Furthermore, their simple structure facilitates weight reduction.

[0176] For example, the insulating material can be polyurethane, thermal insulation foam, etc. This application does not specifically limit the type of insulating material; any suitable material can be used.

[0177] In some embodiments, the water vapor content in the sealing cavity 10 can be kept as low as possible by filling the sealing cavity 10 with dry gas, thereby reducing the possibility of condensation forming on the insulating section 311 and the insulating sleeve 32 and improving their insulation performance.

[0178] In some embodiments, the sealed cavity 10 may be filled only with insulating and heat-insulating material 20, or only with dry gas, or may be filled with both insulating and heat-insulating material and dry gas.

[0179] In some embodiments of this application, the energy storage device 100 further includes a second detection component 8, an alarm component, and a controller. The second detection component 8 is signal-connected to the controller, and the alarm component is also signal-connected to the controller. The detection end of the second detection component 8 is located inside the sealed cavity 10. The second detection component 8 is used to detect the humidity inside the sealed cavity 10. If the humidity detected by the second detection component is higher than a preset humidity, the controller controls the alarm component to issue an alarm signal.

[0180] The second detection component 8 is a component capable of detecting the humidity inside the sealed cavity 10. Thus, the humidity inside the sealed cavity 10 can be detected in real time through the second detection component 8. When the humidity inside the sealed cavity 10 is high, an alarm signal is issued, thereby prompting the staff to take timely action to reduce the humidity inside the sealed cavity, maintain the water vapor content inside the sealed cavity 10 at a low level, and reduce the possibility of condensation on the surface of the insulating section 311 and the insulating sleeve 32.

[0181] The second detection component 8 can be, for example, a humidity sensor, an electronic hygrometer, etc. This application embodiment does not specifically limit the type of the second detection component 8; any suitable commercially available detection component can be used, as long as it can detect the humidity within the sealed cavity 10.

[0182] Signal connections include, but are not limited to, electrical connections, Bluetooth connections, antenna signal connections, or WiFi connections. This application does not specifically limit the signal connection method between the second detection component 8, the alarm component, and the controller, as long as information transmission is possible.

[0183] The alarm signals emitted by the alarm component include, but are not limited to, visual alarm signals such as flashing indicator lights, audible alarm signals such as sound alarms, or alarm abnormality prompts that pop up on the host computer.

[0184] In some embodiments of this application, such as Figure 1 As shown, the conveying assembly 3 also includes a first flange assembly 91 and a second flange assembly 92. Along the conveying direction of the conveying pipe 31, the first flange assembly 91 is connected to the upstream side of the insulating section 311, and the second flange assembly 92 is connected to the downstream side of the insulating section 311.

[0185] Therefore, the insulating section 311 can be connected to other structures such as external pipelines (e.g., other pipelines of the delivery pipe 31 that do not have insulating properties) through the first flange assembly 91 and the second flange assembly 92, which is simple in structure and easy to assemble.

[0186] It is understandable that the structures of the first flange assembly 91 and the second flange assembly 92 can be the same or different, and can be adapted to specific connection requirements.

[0187] A second aspect of this application provides a conveying assembly 3 for conveying a cooling medium. The conveying assembly 3 includes a conveying pipe 31 and an insulating sleeve 32. Along the conveying direction of the conveying pipe 31, at least a portion of the length of the conveying pipe 31 is configured as an insulating section 311. The insulating sleeve 32 is sleeved on the outer periphery of the insulating section 311, and a sealing cavity 10 is formed between the insulating sleeve 32 and the insulating section 311. The insulating sleeve 32 and the insulating section 311 are sealed together by a heating assembly 4.

[0188] Therefore, the sealed cavity 10 can effectively reduce heat transfer and improve the thermal insulation performance of the insulating section 311, thereby reducing the possibility of forming a continuous condensate film on the outer periphery of the insulating section 311 or the insulating sleeve 32, and thus maintaining the insulation effect of both.

[0189] In addition, since the insulating sleeve 32 and the insulating section 311 of this application are sealed together by the heating component 4, the structure is simple and the sealing effect is better. Therefore, the sealing cavity 10 can have better heat insulation and heat preservation effect, which is conducive to further improving the insulation effect of the insulating section 311 and reducing the possibility of condensation.

[0190] In some embodiments, the insulating sleeve 32 includes a tube body 320, a first cover 321, and a second cover 322. Along the conveying direction of the conveying pipe 31, the first cover 321 is fitted onto the upstream side of the tube body 320, and the second cover 322 is fitted onto the downstream side of the tube body 320. The first cover 321 is sealed to both the insulating section 311 and the tube body 320, and the second cover 322 is sealed to both the insulating section 311 and the tube body 320.

[0191] Therefore, the sealing connection between the insulating sleeve 32 and the insulating section 311 can be achieved through the first cover 321, the second cover 322 and the tube body 320, which provides better assembly flexibility and eliminates the need to prepare molds for insulating sleeves 32 of various lengths and sizes, thus helping to reduce production costs.

[0192] In some embodiments, a first water-blocking member 5 is formed on the outer peripheral side of the first cover 321, and the first water-blocking member 5 extends from the outer peripheral side of the first cover 321 toward a direction away from the first cover 321 along the radial direction of the insulating sleeve 32; or, a first water-blocking member 5 is formed on the outer peripheral side of the second cover 322, and the first water-blocking member 5 extends from the outer peripheral side of the second cover 322 toward a direction away from the second cover 322 along the radial direction of the insulating sleeve 32.

[0193] Therefore, when the condensate formed in the upper part of the conveying pipe 31 flows to the insulating section 311 and the insulating sleeve 32, it will be blocked by the first water-blocking component 5, thereby reducing the possibility of the condensate flowing to the outer periphery of the insulating sleeve 32 and forming a continuous condensate film, which would cause the insulating section 311 and the insulating sleeve 32 to fail to perform their insulating function, thus improving the reliability and stability of the conveying component 3.

[0194] In some embodiments, the insulating sleeve 32 includes a first segment 323, a second segment 324 and a third segment 325. Along the extending direction of the insulating sleeve 32, the second segment 324 and the third segment 325 are respectively connected to the opposite ends of the first segment 323. The first segment 323, the second segment 324 and the third segment 325 constitute an integral structural member.

[0195] Thus, the insulating sleeve 32 is formed as an integral structural component with fewer parts, and the assembly steps are simple when it is used with the insulating section 311, which helps to reduce production and assembly costs.

[0196] A third aspect of this application provides an energy storage system, which includes a power conversion device and an energy storage device 100 as described in the first aspect of this application. The power conversion device is electrically connected to a power generation device and the energy storage device 100.

[0197] The energy storage system provided in this application embodiment can be any power system that requires the use of energy storage device 100. For example, the energy storage system can be a high-voltage direct-connected energy storage system.

[0198] An energy storage system may include one or more energy storage devices 100 and a power converter system (PCS), which is used to connect the power generation equipment and the energy storage devices 100. The power generation equipment generates electrical energy, which can be stored in the energy storage devices 100 through the power converter system.

[0199] As an example, the power generation equipment can specifically be solar panels, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0200] Because the insulation section 311 of the delivery pipe 31 used by the energy storage device 100 to transport the cooling medium is not prone to condensation, it can maintain a good insulation effect, thereby making the energy storage system more reliable.

[0201] The following describes specific examples of some embodiments of this application with reference to the accompanying drawings.

[0202] As a specific example, the high-voltage energy storage submodule (energy storage device 100) includes an insulating pipeline (transmission assembly 3), which may include an inner pipe (transmission pipe 31), an outer pipe (insulating sleeve 32), a sleeve upper cover (second cover 322), and a sleeve lower cover (first cover 321). The inner tube, outer tube, upper cover, and lower cover are all made of insulating material used in high-voltage energy storage submodules, such as PVDF. The outer tube has a larger inner diameter than the inner tube. One end of the upper cover has a slightly larger inner diameter than the inner tube, and the other end has a slightly larger inner diameter than the outer tube. The inner tube is inserted into the upper cover, and the outer tube is inserted into the upper cover. There are embedded electric heating wires (heating components 4) at the contact points between the upper cover and the inner and outer tubes. After installation, the heating wires are in contact with the upper cover, inner tube, and outer tube. When the electric heating wires are energized, they can heat and melt the contact points between the upper cover, inner tube, and outer tube, thus allowing the upper cover to fuse with the outer walls of the inner and outer tubes to achieve process sealing.

[0203] The upper cover of the sleeve is designed with a downward-sloping drainage angle (first water-blocking component 5) at the bottom, so that the condensate in the upper pipeline will not flow onto the outer pipe wall.

[0204] The lower cover of the casing is connected to the inner and outer pipes using the same principle, the difference being that the lower cover of the casing has no hydrophobic tilt angle.

[0205] As another concrete example, the high-voltage energy storage submodule (energy storage device 100) includes an insulating conduit (transmission assembly 3), which may include an inner tube (transmission pipe 31) and an outer tube (insulating sleeve 32). The outer tube port (second section 324, third section 325) is reduced in diameter through a necking process to fit snugly against the inner tube, and an electric heating wire (heating assembly 4) is embedded in the necked end. After installation, the heating wire is in contact with both the inner and outer tubes. When the electric heating wire is energized, it can heat and melt the contact area between the inner and outer tubes, and the part where the inner and outer tubes are joined can be fused together by heating and melting with the electric heating wire, thus achieving process sealing.

[0206] A water-repellent plate (second water-blocking component 6) is designed on the upper part of the outer tube. The water-repellent plate is inserted into the outer tube and fits against the outer tube. At the same time, an electric heating wire is embedded inside the water-repellent plate to achieve fusion and fixation with the outer wall of the outer tube.

[0207] For example, an external device interface (vacuum structure) is added to the outer tube to evacuate the space between the inner and outer tubes (sealed cavity 10) to increase the heat preservation performance, reduce the transfer of cold energy, and prevent condensation from appearing on the outer tube. The vacuum level in the space between the inner and outer tubes is fed back by a pressure gauge (first detection component 7). When the vacuum level in the space between the inner and outer tubes is too low, an alarm maintenance is triggered.

[0208] For example, an external device interface is added to the outer pipe to fill the space between the inner and outer pipes with dry gas. Then, a humidity detection device (second detection component 8) is connected to the interface to detect the relative humidity of the inner space. When the relative humidity is too high, an alarm is triggered for maintenance.

[0209] As another example, an insulating and heat-insulating material 20 is filled between the inner and outer pipes. The insulating and heat-insulating material is a porous material, and the internal air is replaced with dry gas.

[0210] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. An energy storage device, characterized in that, The energy storage device includes: Energy storage unit; Thermal management components, which contain cooling media; A delivery assembly, connecting the energy storage unit and the thermal management assembly, is used to deliver the cooling medium. The delivery assembly includes a delivery pipe and an insulating sleeve. Along the delivery direction of the delivery pipe, at least a portion of the length of the delivery pipe constitutes an insulating section. The insulating sleeve is fitted over the outer periphery of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. A heating component is provided at the connection section between the insulating sleeve and the insulating section, and is used to connect the insulating sleeve and the insulating section.

2. The energy storage device according to claim 1, characterized in that, The heating component is located on the inner circumference of the insulating sleeve, and the insulating sleeve is thermally fused to the insulating section through the heating component.

3. The energy storage device according to claim 1, characterized in that, The insulating sleeve includes a tube body, a first cover, and a second cover; Along the conveying direction of the conveying pipe, the first cover is sleeved on the upstream side of the pipe body, and the second cover is sleeved on the downstream side of the pipe body; The first cover is sealed to the insulating section and the tube body respectively, and the second cover is sealed to the insulating section and the tube body respectively.

4. The energy storage device according to claim 3, characterized in that, Along the conveying direction of the conveying pipe, the first cover includes a first end and a second end, the equivalent diameter of the first end being smaller than the equivalent diameter of the second end, the first end constituting the connecting segment, and the second end being sealed to the pipe body; and / or Along the conveying direction of the conveying pipe, the second cover includes a third end and a fourth end, the equivalent diameter of the third end is smaller than the equivalent diameter of the fourth end, the third end is configured as the connecting section, and the fourth end is sealed to the pipe body.

5. The energy storage device according to claim 4, characterized in that, The heating assembly is provided on the inner circumference side of the second end, and the second end is thermally fused to the tube body through the heating assembly; and / or The heating component is provided on the inner circumference of the fourth end, and the fourth end is thermally fused to the tube body through the heating component.

6. The energy storage device according to claim 3, characterized in that, A first water-blocking member is formed on the outer peripheral side of the first cover, extending from the outer peripheral side of the first cover toward a direction away from the first cover along the radial direction of the insulating sleeve; or A first water-blocking member is formed on the outer peripheral side of the second cover, and the first water-blocking member extends from the outer peripheral side of the second cover toward a direction away from the second cover along the radial direction of the insulating sleeve.

7. The energy storage device according to claim 6, characterized in that, Along the direction of gravity, the first water-blocking component extends at an angle toward the ground.

8. The energy storage device according to claim 1, characterized in that, The insulating sleeve includes a first section, a second section, and a third section. Along the extending direction of the insulating sleeve, the second section and the third section are respectively connected to opposite ends of the first section. The equivalent diameter of the second section and the third section is smaller than the equivalent diameter of the first section, and the second section and the third section constitute the connecting section. The first segment, the second segment, and the third segment constitute an integral structural component.

9. The energy storage device according to claim 8, characterized in that, The conveying assembly further includes a second water-blocking component, which is sleeved on the outer periphery of the insulating sleeve; Along the radial direction of the insulating sleeve, a portion of the second water-blocking member extends from the outer peripheral side of the insulating sleeve toward a direction away from the insulating sleeve.

10. The energy storage device according to claim 9, characterized in that, Along the direction of gravity, a portion of the second water-blocking component extends at an angle toward the ground.

11. The energy storage device according to claim 9, characterized in that, The second water-blocking component includes a connecting portion and a water-blocking portion. The connecting portion is sleeved on the outer periphery of the insulating sleeve, and the water-blocking portion extends in a direction away from the insulating sleeve. The connecting part is provided with a heating component on the side facing the insulating sleeve, and the connecting part is thermally fused to the insulating sleeve through the heating component.

12. The energy storage device according to any one of claims 1 to 11, characterized in that, The energy storage device also includes a vacuum pumping component; A vacuum interface is formed on the insulating sleeve to communicate with the sealed cavity, and the vacuum pumping assembly is connected to the vacuum interface, so that the sealed cavity constitutes a vacuum cavity.

13. The energy storage device according to claim 12, characterized in that, The energy storage device further includes a first detection component, an alarm component, and a controller, wherein the first detection component is signal-connected to the controller, and the alarm component is signal-connected to the controller. The detection end of the first detection component is located inside the sealed cavity. The first detection component is used to detect the vacuum level inside the sealed cavity. When the vacuum level detected by the first detection component is lower than the preset vacuum level, the controller controls the alarm component to issue an alarm signal.

14. The energy storage device according to any one of claims 1 to 11, characterized in that, The sealed cavity is filled with insulating and heat-insulating material and / or dry gas.

15. The energy storage device according to claim 14, characterized in that, The energy storage device further includes a second detection component, an alarm component, and a controller, wherein the second detection component is signal-connected to the controller, and the alarm component is signal-connected to the controller. The detection end of the second detection component is located inside the sealed cavity. The second detection component is used to detect the humidity inside the sealed cavity. When the humidity detected by the second detection component is higher than the preset humidity, the controller controls the alarm component to issue an alarm signal.

16. The energy storage device according to any one of claims 1 to 11, characterized in that, The insulating section is made of polyvinylidene fluoride; and / or The insulating sleeve is made of polyvinylidene fluoride.

17. The energy storage device according to any one of claims 1 to 11, characterized in that, The conveying assembly further includes a first flange assembly and a second flange assembly; Along the conveying direction of the conveying pipe, the first flange assembly is connected to the upstream side of the insulating section, and the second flange assembly is connected to the downstream side of the insulating section.

18. A conveying assembly, characterized in that, For conveying cooling medium, the conveying assembly includes a conveying pipe and an insulating sleeve. Along the conveying direction of the conveying pipe, at least a portion of the length of the conveying pipe is configured as an insulating section. The insulating sleeve is fitted around the outer periphery of the insulating section, and a sealed cavity is formed between the insulating sleeve and the insulating section. The insulating sleeve and the insulating section are sealed together by a heating assembly.

19. The conveying assembly according to claim 18, characterized in that, The insulating sleeve includes a tube body, a first cover, and a second cover; Along the conveying direction of the conveying pipe, the first cover is sleeved on the upstream side of the pipe body, and the second cover is sleeved on the downstream side of the pipe body; The first cover is sealed to the insulating section and the tube body respectively, and the second cover is sealed to the insulating section and the tube body respectively.

20. The conveying assembly according to claim 19, characterized in that, A first water-blocking member is formed on the outer peripheral side of the first cover, extending from the outer peripheral side of the first cover toward a direction away from the first cover along the radial direction of the insulating sleeve; or A first water-blocking member is formed on the outer peripheral side of the second cover, and the first water-blocking member extends from the outer peripheral side of the second cover toward a direction away from the second cover along the radial direction of the insulating sleeve.

21. The conveying assembly according to claim 18, characterized in that, The insulating sleeve includes a first section, a second section, and a third section. Along the extension direction of the insulating sleeve, the second section and the third section are respectively connected to the opposite ends of the first section. The first section, the second section, and the third section constitute an integral structural component.

22. An energy storage system, characterized in that, The energy storage system includes; Power conversion device; and The energy storage device according to any one of claims 1 to 17; The power conversion device is electrically connected to the power generation device and the energy storage device.

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