Energy storage device, energy storage system and charging network

Abstract

The utility model relates to the field of energy storage, provide a kind of energy storage device, energy storage system and charging network, the energy storage device includes box, cooling circulation component and heat exchange device, cooling circulation component includes expansion tank, circulation pipeline and connecting component, connecting component includes valve body and connecting pipe body, connecting pipe body has two connecting end, at least one of two connecting end is connected by valve body to realize expansion tank and circulation pipeline intercommunication.The energy storage device provided by the utility model realizes the intercommunication of expansion tank and circulation pipeline using at least partly flexible connecting pipe body, to utilize the flexible characteristics of connecting pipe body to reduce the stress in pipeline, and, flexible characteristics can also reduce its installation space, at the same time, at least one connecting end in connecting pipe body realizes the intercommunication of expansion tank and circulation pipeline by valve body, then, the convenience of maintenance can be improved by closing valve body to reduce cooling from flowing out of expansion tank or circulation pipeline.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular provides an energy storage device, an energy storage system and a charging network. Background Technology

[0002] Energy storage devices may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When an energy storage device includes multiple battery clusters, the clusters are connected in parallel to increase the capacity of the energy storage device. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0003] Battery clusters generate a significant amount of heat during operation, typically requiring a cooling circulation module for heat exchange. This module includes an expansion tank, a device used in pressure systems to regulate fluid pressure. Its core structure comprises a tank body, a diaphragm, and connecting piping. The tank body is divided into a gas chamber and a liquid chamber by a diaphragm or float. When the pressure in the cooling circulation system changes, the gas chamber absorbs or releases energy through compression or expansion, thus buffering pressure fluctuations and preventing damage to the cooling circulation system due to overpressure or negative pressure.

[0004] However, traditional expansion tanks often use fixed rigid pipes for pipeline connections, which can lead to stress concentration issues. Furthermore, if leaks, blockages, or component aging occur, the entire system must be disassembled to replace the parts, which is not only time-consuming and labor-intensive but also results in excessive downtime and reduced production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an energy storage device, an energy storage system, and a charging network, aiming to solve the problems of high stress and difficult maintenance in the pipeline connection method of the expansion tank in existing energy storage devices.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] In a first aspect, this application provides an energy storage device, comprising:

[0008] Box;

[0009] A cooling circulation assembly, disposed on the housing, includes an expansion tank, a circulation pipeline, and a connecting assembly for connecting the expansion tank and the circulation pipeline. The connecting assembly includes a valve body and a connecting pipe body, each having two opposing connecting ends. Each connecting end is used to connect the expansion tank and the circulation pipeline, respectively. At least one of the two connecting ends connects the expansion tank and the circulation pipeline via the valve body. At least a portion of the connecting pipe body is flexible.

[0010] A heat exchange device is provided on the housing, and the expansion tank is arranged adjacent to the heat exchange device and both are located at the top of the housing. The connecting assembly is connected to the heat exchange device.

[0011] The beneficial effects of this utility model are as follows: The energy storage device provided by this utility model uses a connecting pipe, at least partially flexible, in its cooling circulation assembly to connect the expansion tank and the circulation pipeline. This flexibility reduces stress in the pipeline and also reduces space constraints during installation. Furthermore, at least one connecting end of the connecting pipe connects the expansion tank and the circulation pipeline via a valve. During later maintenance, closing the valve reduces the outflow of coolant from the expansion tank or circulation pipeline, improving maintenance convenience. Additionally, the heat exchange device is located adjacent to the expansion tank at the top of the housing, further saving space.

[0012] In some embodiments, the connecting pipe body includes a flexible connecting pipe segment having two connecting ends.

[0013] By adopting the above technical solution, the entire connecting pipe body is made of flexible connecting pipe sections, which greatly reduces the stress in the pipeline and improves the overall deformability of the connecting pipe body, thereby improving the adaptability of the installation.

[0014] In some embodiments, the connecting pipe body further includes a connector, and the connecting end of the flexible connecting pipe section is connected to the valve body via the connector.

[0015] By adopting the above technical solution, the airtightness of the connection between the flexible tube's connecting end and the valve body is increased by using connectors.

[0016] In some embodiments, the connector includes a connector body and a nut portion. The connector body has a plug section, a first threaded section, and a second threaded section. The first threaded section is threadedly connected to the valve body. The nut portion is sleeved on the outer wall of the flexible connecting pipe section. The plug section passes through the inner wall of the flexible connecting pipe section. The nut portion is threadedly connected to the second threaded section to compress and limit the flexible connecting pipe section at the plug section.

[0017] By adopting the above technical solution, the first threaded section of the connector body is connected to the valve body, and the plug section of the connector body is plugged into the flexible connecting pipe section. Then, the nut part is threaded into the second threaded section to limit the flexible connecting pipe section between the plug section and the nut part for fixation.

[0018] In some embodiments, the connecting pipe body includes a flexible connecting pipe segment and a rigid connecting pipe segment connected to the flexible connecting pipe segment.

[0019] By adopting the above technical solution, the connecting pipe body is designed with a structure of partially flexible connecting pipe sections and partially rigid connecting pipe sections, which can reduce the stress in the pipeline and improve its adaptability during installation.

[0020] In some embodiments, the number of flexible connecting pipe segments is one, the number of rigid connecting pipe segments is one, the flexible connecting pipe segment has one of the connecting ends, and the rigid connecting pipe segment has the other connecting end.

[0021] By adopting the above technical solution, the connecting pipe body is divided into two parts, namely a flexible connecting pipe section and a rigid connecting pipe section, in order to reduce the stress in the pipeline and improve its adaptability during installation.

[0022] In some embodiments, the number of flexible connecting pipe segments is at least two, the number of rigid connecting pipe segments is one, and the flexible connecting pipe segment has two connecting ends; or...

[0023] The number of the flexible connecting pipe segment is one, and the number of the rigid connecting pipe segments is at least two, with each rigid connecting pipe segment having two connecting ends; or...

[0024] The number of flexible connecting pipe segments is multiple, the number of rigid connecting pipe segments is multiple, and the flexible connecting pipe segment has two connecting ends.

[0025] By adopting the above technical solutions, the number of flexible and rigid connecting pipe sections can be adjusted according to practical needs to improve the spatial adaptability of the connecting pipe body.

[0026] In some embodiments, the connecting pipe body includes a nut, the rigid connecting pipe section has an insertion portion and a threaded portion, the nut is sleeved on the outer side wall of the flexible connecting pipe section, the insertion portion passes through the inner side wall of the flexible connecting pipe section, and the nut is threadedly connected to the threaded portion to compress and limit the flexible connecting pipe section at the insertion portion.

[0027] By adopting the above technical solution, the plug part of the rigid connecting pipe section is plugged into the flexible connecting pipe section, and then the nut is threaded into the threaded part of the rigid connecting pipe section to limit the flexible connecting pipe section between the plug part and the nut to achieve fixation.

[0028] In some embodiments, the housing has a top portion, the top portion being provided with a mounting groove, and the expansion tank, the connecting assembly, and the circulation pipeline are disposed at the mounting groove.

[0029] By adopting the above technical solution, the expansion tank, connecting components and circulation pipeline are installed at the top of the box, thereby reducing their encroachment on the internal space of the box and providing more installation space for the battery cluster.

[0030] Secondly, this application provides an energy storage system, including a power conversion device and an energy storage device as described above, wherein the power conversion device is used to electrically connect the energy storage device.

[0031] Thirdly, this application provides a charging network, including a charging pile and an energy storage device or energy storage system as described above, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0032] The beneficial effects of the second and third aspects can be referred to the beneficial effects of the first aspect, and will not be elaborated here.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A partial bottom view of the energy storage device provided in an embodiment of this utility model;

[0036] Figure 2 A partial enlarged view of the energy storage device provided in the embodiment of this utility model;

[0037] Figure 3 A schematic diagram of the cooling cycle assembly of the energy storage device provided in this embodiment of the utility model;

[0038] Figure 4 Exploded view of the connecting component of the cooling circulation assembly of the energy storage device provided in the embodiment of this utility model;

[0039] Figure 5 Exploded view of the connecting pipe of the cooling circulation assembly of the energy storage device provided in this embodiment of the utility model;

[0040] Figure 6 A schematic diagram of the energy storage system provided in an embodiment of this utility model;

[0041] Figure 7 This is a schematic diagram of the charging network provided in an embodiment of the present invention.

[0042] The following are the labeling elements in the figure:

[0043] 1000, Energy storage device; 2000, Energy storage system; 2100, Power conversion device; 2200, Power generation device; 3000, Charging network; 3100, Charging pile; 3110, Connector;

[0044] 10. Enclosure; 11. Mounting slot;

[0045] 20. Cooling circulation assembly; 21. Expansion tank; 22. Circulation pipeline; 23. Connecting assembly; 231. Valve body; 232. Connecting pipe body; 232a. Connecting end; 2321. Flexible connecting pipe section; 2322. Connector; 23221. Connector body; 23222. Nut part; 2322a. Insertion section; 2322b. First threaded section; 2322c. Second threaded section; 2323. Rigid connecting pipe section; 2324. Nut part; 2323a. Insertion part; 2323b. Threaded part;

[0046] 30. Heat exchange device. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0048] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 this utility model according to the specific circumstances.

[0051] Energy storage devices may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When an energy storage device includes multiple battery clusters, the clusters are connected in parallel to increase the capacity of the energy storage device. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0052] Battery clusters generate a significant amount of heat during operation, typically requiring a cooling circulation module for heat exchange. This module includes an expansion tank, a device used in pressure systems to regulate fluid pressure. Its core structure comprises a tank body, a diaphragm, and connecting piping. The tank body is divided into a gas chamber and a liquid chamber by a diaphragm or float. When the pressure in the cooling circulation system changes, the gas chamber absorbs or releases energy through compression or expansion, thus buffering pressure fluctuations and preventing damage to the cooling circulation system due to overpressure or negative pressure.

[0053] In related fields, expansion tanks often use fixed rigid pipes for pipeline connections. This makes it difficult for the pipelines to deform, and the structure is fixed or needs to be set into a specific shape. Ultimately, this can easily lead to stress concentration at the connection. Furthermore, once a leak, blockage, or component aging occurs, the entire system needs to be disassembled to replace the parts. This is not only time-consuming and labor-intensive, but also results in excessive downtime and affects production efficiency.

[0054] In view of this, this application provides an energy storage device in which the connecting component of the cooling circulation assembly adopts a connecting pipe that is at least partially flexible to connect the expansion tank and the circulation pipeline. The flexibility of the connecting pipe reduces stress in the pipeline and also reduces constraints on the installation space. At the same time, at least one connecting end of the connecting pipe connects the expansion tank and the circulation pipeline through a valve. In the later maintenance, the flow of cooling from the expansion tank or the circulation pipeline can be reduced by closing the valve, thus improving the convenience of maintenance.

[0055] Specifically, an energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0056] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0057] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0058] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0059] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0060] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0061] 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.

[0062] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0063] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0064] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0065] Please refer to Figures 1 to 3 This application provides an energy storage device 1000 including a housing 10, a cooling circulation assembly 20, and a heat exchange device 30. The cooling circulation assembly 20 is disposed on the housing 10 and includes an expansion tank 21, a circulation pipeline 22, and a connecting assembly 23 for connecting the expansion tank 21 and the circulation pipeline 22. The connecting assembly 23 includes a valve body 231 and a connecting pipe body 232. The connecting pipe body 232 has two connecting ends 232a arranged opposite to each other. Each connecting end 232a is used to connect the expansion tank 21 and the circulation pipeline 22, respectively. At least one of the two connecting ends 232a is connected to the expansion tank 21 and the circulation pipeline 22 through the valve body 231. At least a portion of the connecting pipe body 232 is flexible. The heat exchange device 30 is disposed on the housing 10. The expansion tank 21 and the heat exchange device 30 are arranged adjacent to each other and are both located at the top of the housing 10. The connecting assembly 23 is connected to the heat exchange device 30.

[0066] Understandably, the enclosure 10 is the outer shell of the energy storage device 1000. The enclosure 10 contains a battery compartment and an electrical compartment for the installation of battery clusters, fire protection modules, thermal management modules, main control modules, central control modules, power distribution modules, etc.

[0067] The cooling circulation assembly 20 is a component that performs heat exchange on the heat-generating modules in the energy storage device 1000 to maintain the temperature required for their normal operation. The cooling circulation assembly 20 includes three parts: an expansion tank 21, a circulation pipeline 22, and a connecting assembly 23. The expansion tank 21 is a device used to regulate fluid pressure in a pressure system. Its core structure includes a tank body, a diaphragm, and connecting pipelines. The tank body is divided into a gas chamber and a liquid chamber by a diaphragm or float. When the pressure of the cooling circulation system changes, the gas chamber absorbs or releases energy through compression or expansion, thereby buffering pressure fluctuations and preventing damage to the cooling circulation system due to overpressure or negative pressure. The circulation pipeline 22 is a pipeline structure used for the flow of the heat exchange medium. The connecting assembly 23 connects the expansion tank 21 and the circulation pipeline 22 to allow the medium in the circulation pipeline 22 to flow into or out of the expansion tank 21.

[0068] The connecting assembly 23 includes a valve body 231 and a connecting pipe body 232. The valve body 231 is used to allow or cut off the flow of media within the connecting pipe body 232. The connecting pipe body 232 is used to allow the flow of media. The connecting end 232a is the end of the connecting pipe body 232 used to connect to the expansion tank 21 or the circulation pipeline 22. It should be understood that the connecting pipe body 232 has two connecting ends 232a. In terms of connection selection, one connecting end 232a of the connecting pipe body 232 can be connected to the expansion tank 21 or the circulation pipeline 22 through the valve body 231, or both connecting ends 232a of the connecting pipe body 232 can be connected to the expansion tank 21 and the circulation pipeline 22 respectively through the valve body 231.

[0069] The connecting pipe 232 adopts a structure that is at least partially flexible. For example, the connecting pipe 232 can be made entirely of flexible materials, such as rubber (EPDM, nitrile rubber), fluoroplastics (PTFE), metals (corrugated pipes), or plastics (PVC, polyethylene, thermoplastic elastomers, and polypropylene). Alternatively, the connecting pipe 232 can also be partially made of flexible materials, meaning that some sections of the connecting pipe 232 are much more flexible than others. For example, the connecting pipe 232 can be structured as a combination of flexible and rigid pipe sections. The rigid pipe section can be understood as a pipe without flexibility or that cannot be deformed, while the flexible pipe section is a pipe that can be bent or deformed, and then the flexible and rigid pipe sections are connected together.

[0070] The heat exchanger 30 is a core component of the refrigeration and heat exchange systems. Simply put, its function is to cool and liquefy high-temperature, high-pressure gas (or steam) into a liquid, while simultaneously releasing the absorbed heat to the external environment. Typically, the heat exchanger 30 has a relatively large volume; however, placing it adjacent to the expansion tank 21 at the top of the housing 10 saves space. Specifically, the heat exchanger 30 is located at the top of the housing 10, corresponding to the battery compartment, while the expansion tank 21 is located at the top of the housing 10, corresponding to the electrical compartment. The energy storage device 1000 provided by this utility model uses a connecting component 23 in its cooling circulation assembly 20, which is at least partially flexible, to connect the expansion tank 21 and the circulation pipeline 22. This flexibility reduces stress in the pipeline and also reduces space constraints during installation. Furthermore, at least one connecting end 232a of the connecting pipe 232 connects the expansion tank 21 and the circulation pipeline 22 via a valve body 231. During later maintenance, closing the valve body 231 reduces the outflow of cooling medium from the expansion tank 21 or the circulation pipeline 22, improving maintenance convenience. Additionally, the heat exchange device 30 is located adjacent to the top of the housing, further saving space.

[0071] Please refer to Figure 3 In some embodiments, the connecting pipe body 232 includes a flexible connecting pipe segment 2321, which has two connecting ends 232a.

[0072] Understandably, in this embodiment, the entire connecting pipe body 232 adopts a flexible connecting pipe segment 2321, that is, all parts of the connecting pipe body 232 are flexible.

[0073] Here, the flexible connecting tube 232 can be made of rubber (EPDM rubber, nitrile rubber), fluoroplastics (PTFE), metal (corrugated pipe), plastics (PVC, polyethylene, thermoplastic elastomer, and polypropylene), etc.

[0074] The two connecting ends 232a of the flexible connecting pipe section 2321 can be connected to the valve body 231 by means of plugging, snapping, or hot-melt connection.

[0075] In this way, the entire connecting pipe body 232 is made of flexible connecting pipe section 2321, which greatly reduces the stress in the pipeline and improves the overall deformability of the connecting pipe body 232, thereby improving the adaptability of the installation.

[0076] Please refer to Figure 3 and Figure 4In some embodiments, the connecting pipe body 232 further includes a connector 2322, and the connecting end 232a of the flexible connecting pipe segment 2321 is connected to the valve body 231 through the connector 2322.

[0077] Understandably, in order to improve the sealing performance of the connection between the flexible connecting pipe section 2321 and the valve body 231, a connector 2322 is required. Here, the connector 2322 can be a connecting adapter structure, a bundling structure, or a combination of the two.

[0078] For example, the connecting adapter structure should be a pipe structure with external threads, and a nut structure that is threadedly connected to it. During connection, the nut structure is first fitted onto the outer wall of the flexible connecting section, and the flexible connecting pipe section 2321 is then inserted into one end of the pipe structure. The nut structure is threadedly connected to the external threads of the pipe structure, and the part of the flexible connecting section fitted onto the pipe structure is abutted and limited to reduce the probability of the flexible connecting pipe section 2321 coming off the pipe. One end of the pipe structure is then threadedly connected to the valve body 231.

[0079] Alternatively, the connecting end 232a of the flexible connecting pipe section 2321 can be directly sleeved onto the output end of the valve body 231, and then bound to the outer wall of the flexible connecting pipe section 2321 by a binding structure such as cable ties or hose clamps, so as to achieve the connection between the flexible connecting pipe section 2321 and the valve body 231.

[0080] Thus, the connection between the flexible tube's connecting end 232a and the valve body 231 is increased by using the connector 2322.

[0081] Please refer to Figure 4 In some embodiments, the connector 2322 includes a connector body 23221 and a nut portion 23222. The connector body 23221 has an insertion section 2322a, a first threaded section 2322b, and a second threaded section 2322c. The first threaded section 2322b is threaded to the valve body 231. The nut portion 23222 is sleeved on the outer side wall of the flexible connecting pipe section 2321. The insertion section 2322a passes through the inner side wall of the flexible connecting pipe section 2321. The nut portion 23222 is threaded to the second threaded section 2322c to compress and limit the flexible connecting pipe section 2321 to the insertion section 2322a.

[0082] Understandably, the connector body 23221 is the main part of the connector 2322, satisfying the requirement to connect with the valve body 231 to achieve communication between the valve body 231 and the flexible connecting pipe section 2321. The nut part 23222 is a nut structure or a nut-like structure with internal threads. The connector body 23221 is divided into three sections, namely, along the axis of the connector body 23221, a plug-in section 2322a, a first threaded section 2322b, and a second threaded section 2322c are arranged sequentially. The plug-in section 2322a is used for plugging into the flexible connecting pipe section 2321, the first threaded section 2322b is used for threaded connection with the nut part 23222, and the second threaded section 2322c is used for threaded connection with the valve body 231.

[0083] The installation process of connector 2322 is as follows: First, the nut part 23222 is sleeved on the outer wall of the flexible connecting pipe section 2321, and then the flexible connecting pipe section 2321 is inserted into the insertion section 2322a. Then, the second threaded section 2322c of the connector body 23221 is threadedly connected to the valve body 231 to achieve fixation. At this time, the nut part 23222 is moved to the first threaded section 2322b and threadedly connected to the first threaded section 2322b.

[0084] Thus, the first threaded section 2322b of the connector body 23221 is connected to the valve body 231, and the insertion section 2322a of the connector body 23221 is inserted and connected to the flexible connecting pipe section 2321. Then, the nut part 23222 is threadedly engaged with the second threaded section 2322c to limit the flexible connecting pipe section 2321 between the insertion section 2322a and the nut part 23222, thereby achieving fixation.

[0085] Please refer to Figure 5 In some embodiments, the connecting pipe body 232 includes a flexible connecting pipe section 2321 and a rigid connecting pipe section 2323 connected to the flexible connecting pipe section 2321.

[0086] Understandably, in this embodiment, the connecting pipe 232 has both flexibility and rigidity, that is, it is composed of a flexible connecting pipe section 2321 and a rigid connecting pipe section 2323.

[0087] For example, there is one flexible connecting pipe segment 2321 and one rigid connecting pipe segment 2323. That is, the connecting pipe body 232 is composed of two pipe segments connected together.

[0088] For example, there are multiple flexible connecting pipe segments 2321 and multiple rigid connecting pipe segments 2323. Each flexible connecting pipe segment 2321 is used to connect two adjacent rigid connecting pipe segments 2323, or the flexible connecting pipe segment 2321 is used to connect the valve body 231 and the rigid connecting pipe segment 2323.

[0089] Thus, by adopting a structure of partially flexible connecting pipe section 2321 and partially rigid connecting pipe section 2323 for the connecting pipe body 232, the stress in the pipeline can be reduced, and its adaptability during installation can be improved.

[0090] In some embodiments, the number of flexible connecting pipe segments 2321 is one, the number of rigid connecting pipe segments 2323 is one, the flexible connecting pipe segment 2321 has one connecting end 232a, and the rigid connecting pipe segment 2323 has another connecting end 232a.

[0091] Understandably, the connecting pipe body 232 has a part of flexibility and a part of rigidity. That is, the connecting pipe body 232 is composed of a flexible connecting pipe section 2321 and a rigid connecting pipe section 2323. At the same time, the length of the flexible connecting pipe section 2321 and the length of the rigid connecting pipe section 2323 can be set according to the spatial layout requirements.

[0092] Thus, the connecting pipe body 232 is divided into two parts, namely the flexible connecting pipe section 2321 and the rigid connecting pipe section 2323, in order to reduce the stress in the pipeline and improve its adaptability during installation.

[0093] In some embodiments, the number of flexible connecting pipe segments 2321 is at least two, the number of rigid connecting pipe segments 2323 is one, and the flexible connecting pipe segment 2321 has two connecting ends 232a.

[0094] Understandably, in this embodiment, the rigid connecting pipe section 2323 is mainly arranged between the two flexible connecting pipe sections 2321. That is, the position where the connecting pipe body 232 can undergo flexible deformation is concentrated near the valve body 231.

[0095] Alternatively, the number of flexible connecting pipe segments 2321 is one, and the number of rigid connecting pipe segments 2323 is at least two, with the rigid connecting pipe segment 2323 having two connecting ends 232a.

[0096] Understandably, in this embodiment, the flexible connecting pipe section 2321 is mainly arranged between two rigid connecting pipe sections 2323. That is, the position where the connecting pipe body 232 can undergo flexible deformation is concentrated in the middle position away from the valve body 231.

[0097] Alternatively, there may be multiple flexible connecting pipe segments 2321 and multiple rigid connecting pipe segments 2323, with each flexible connecting pipe segment 2321 having two connecting ends 232a.

[0098] Understandably, in this embodiment, each flexible connecting pipe segment 2321 is used to connect two adjacent rigid connecting pipe segments 2323, thereby achieving the purpose of connecting the pipe body 232 to bend and deform in multiple segments.

[0099] Thus, the number of flexible connecting pipe sections 2321 and rigid connecting pipe sections 2323 can be adjusted according to practical needs to improve the spatial adaptability of the connecting pipe body 232.

[0100] Please refer to Figure 5 In some embodiments, the connecting pipe body 232 includes a nut 2324, the rigid connecting pipe section 2323 has a plug portion 2323a and a threaded portion 2323b, the nut 2324 is sleeved on the outer side wall of the flexible connecting pipe section 2321, the plug portion 2323a passes through the inner side wall of the flexible connecting pipe section 2321, and the nut 2324 is threadedly connected to the threaded portion 2323b to compress and limit the flexible connecting pipe section 2321 to the plug portion 2323a.

[0101] Understandably, the specific connection method between the rigid connecting pipe section 2323 and the flexible connecting pipe section 2321 is as follows: First, the nut 2324 is sleeved on the outer wall of the flexible connecting pipe section 2321, and then the flexible connecting pipe section 2321 is inserted into the insertion part 2323a. Then, the nut 2324 is moved to the threaded part 2323b and threadedly connected to the threaded part 2323b.

[0102] Thus, the insertion part 2323a of the rigid connecting pipe section 2323 is inserted into the flexible connecting pipe section 2321, and then the nut 2324 is threaded into the threaded part 2323b of the rigid connecting pipe section 2323, so as to limit the flexible connecting pipe section 2321 between the insertion part 2323a and the nut 2324 and achieve fixation.

[0103] Please refer to Figure 1 and Figure 2 In some embodiments, the housing 10 has a top portion with a mounting groove 11, where the expansion tank 21, the connecting assembly 23, and the circulation pipeline 22 are located.

[0104] Understandably, the top part is the end of the housing 10 placed on the placement surface, that is, the top part has a certain height above the ground. At the same time, the expansion tank 21, the connecting assembly 23 and the circulation pipeline 22 located in the mounting groove 11 are also exposed outside the housing 10, and are covered and protected by a cover or protective component.

[0105] In this way, the expansion tank 21, the connecting assembly 23 and the circulation pipeline 22 are installed at the top of the housing 10 to reduce their encroachment on the internal space of the housing 10 and provide more installation space for the battery cluster.

[0106] Please refer to Figures 1 to 4 In one specific embodiment, the energy storage device 1000 includes a housing 10 and a cooling circulation assembly 20. The cooling circulation assembly 20 is disposed on the housing 10 and includes an expansion tank 21, a circulation pipeline 22, and a connecting assembly 23 for connecting the expansion tank 21 and the circulation pipeline 22. The connecting assembly 23 includes a valve body 231 and a connecting pipe body 232. The connecting pipe body 232 has two connecting ends 232a arranged opposite to each other. Each connecting end 232a is used to connect the expansion tank 21 and the circulation pipeline 22, respectively. Both connecting ends 232a are connected to the expansion tank 21 and the circulation pipeline 22 through the valve body 231.

[0107] The connector includes a flexible connecting pipe section 2321, which has two connecting ends 232a.

[0108] The connecting pipe body 232 also includes a connector 2322, and the connecting end 232a of the flexible connecting pipe section 2321 is connected to the valve body 231 through the connector 2322.

[0109] The connector 2322 includes a connector body 23221 and a nut portion 23222. The connector body 23221 has a plug section 2322a, a first threaded section 2322b, and a second threaded section 2322c. The first threaded section 2322b is threaded to the valve body 231. The nut portion 23222 is sleeved on the outer side wall of the flexible connecting pipe section 2321. The plug section 2322a passes through the inner side wall of the flexible connecting pipe section 2321. The nut portion 23222 is threaded to the second threaded section 2322c to compress and limit the flexible connecting pipe section 2321 to the plug section 2322a.

[0110] The housing 10 has a top part, and the top part is provided with a mounting groove 11. The expansion tank 21 and the circulation pipeline 22 are located in the mounting groove 11.

[0111] Please refer to Figure 6 This application provides an energy storage system 2000, including a power conversion device 2100 and an energy storage device 1000 as described above, wherein the power conversion device 2100 is used to electrically connect the energy storage device 1000.

[0112] In some embodiments, the energy storage system 2000 may include one or more energy storage devices 1000 and a power converter system (PCS) 2100, which is connected between the power generation device 2200 and the energy storage device 1000. The power generation device 2200 generates electrical energy, which can be stored in the energy storage device 1000 via the power converter system 2100. As an example, the power generation device 2200 may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of the power generation device 2200 is not limited in this application.

[0113] Please refer to Figure 7 This application provides a charging network 3000, including a charging pile 3100 and an energy storage device 1000 or an energy storage system 2000 as described above, wherein the energy storage device 1000 is used to provide electrical energy to the charging pile 3100.

[0114] For example, the charging network 3000 includes a charging pile 3100 and an energy storage device 1000. The charging pile 3100 is electrically connected to the energy storage device 1000, which provides electrical energy to the charging pile 3100. The charging pile 3100 is electrically connected to a battery device in the energy storage device 1000 via a cable, and the battery device can provide its stored electrical energy to the charging pile 3100. The charging pile 3100 has one or more connectors 3110 for connecting to electrical devices, thereby providing energy to the electrical devices.

[0115] The energy storage device 1000 can be located inside the charging pile 3100 (e.g., an integrated energy storage and charging unit) or outside the charging pile 3100.

[0116] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy storage device, characterized in that, include: Box; A cooling circulation assembly, disposed on the housing, includes an expansion tank, a circulation pipeline, and a connecting assembly for connecting the expansion tank and the circulation pipeline. The connecting assembly includes a valve body and a connecting pipe body, each having two opposing connecting ends. Each connecting end is used to connect the expansion tank and the circulation pipeline, respectively. At least one of the two connecting ends connects the expansion tank and the circulation pipeline via the valve body. At least a portion of the connecting pipe body is flexible. A heat exchange device is provided on the housing, and the expansion tank is arranged adjacent to the heat exchange device and both are located at the top of the housing. The connecting assembly is connected to the heat exchange device.

2. The energy storage device according to claim 1, characterized in that: The connecting pipe body includes a flexible connecting pipe segment, which has two connecting ends.

3. The energy storage device according to claim 2, characterized in that: The connecting pipe body also includes a connector, and the connecting end of the flexible connecting pipe section is connected to the valve body through the connector.

4. The energy storage device according to claim 3, characterized in that: The connector includes a connector body and a nut portion. The connector body includes a plug section, a first threaded section, and a second threaded section. The first threaded section is threadedly connected to the valve body. The nut portion is sleeved on the outer wall of the flexible connecting pipe section. The plug section passes through the inner wall of the flexible connecting pipe section. The nut portion is threadedly connected to the second threaded section to compress and limit the flexible connecting pipe section at the plug section.

5. The energy storage device according to claim 1, characterized in that: The connecting pipe body includes a flexible connecting pipe section and a rigid connecting pipe section connected to the flexible connecting pipe section.

6. The energy storage device according to claim 5, characterized in that: The number of flexible connecting pipe segments is one, the number of rigid connecting pipe segments is one, the flexible connecting pipe segment has one of the connecting ends, and the rigid connecting pipe segment has the other connecting end.

7. The energy storage device according to claim 5, characterized in that: The number of flexible connecting pipe segments is at least two, the number of rigid connecting pipe segments is one, and the flexible connecting pipe segment has two connecting ends; or... The number of the flexible connecting pipe segment is one, and the number of the rigid connecting pipe segments is at least two, with each rigid connecting pipe segment having two connecting ends; or... The number of flexible connecting pipe segments is multiple, the number of rigid connecting pipe segments is multiple, and the flexible connecting pipe segment has two connecting ends.

8. The energy storage device according to claim 5 or 6, characterized in that: The connecting pipe body includes a nut, the rigid connecting pipe section has an insertion part and a threaded part, the nut is sleeved on the outer wall of the flexible connecting pipe section, the insertion part passes through the inner wall of the flexible connecting pipe section, and the nut is threaded to the threaded part to compress and limit the flexible connecting pipe section to the insertion part.

9. The energy storage device according to any one of claims 1 to 7, characterized in that: The box has a top part, and the top part is provided with a mounting groove. The expansion tank, the connecting assembly and the circulation pipeline are located in the mounting groove.

10. An energy storage system, characterized in that: It includes a power conversion device and an energy storage device as described in any one of claims 1 to 9, wherein the power conversion device is used to electrically connect the energy storage device.

11. A charging network, characterized in that: It includes a charging pile and an energy storage device as described in any one of claims 1 to 9 or an energy storage system as described in claim 10, wherein the energy storage device is used to provide electrical energy to the charging pile.

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