Energy storage device, energy storage system and charging network

Abstract

The application discloses an energy storage device, an energy storage system and a charging network. The energy storage device comprises a box body, a battery cluster, a liquid supply pipeline and a liquid leakage detection assembly. The battery cluster is arranged in the box body. The liquid supply pipeline is arranged in the box body and is used for conveying a heat exchange medium to the battery cluster. The liquid leakage detection assembly comprises a sleeve body, at least two detection elements and a detection circuit electrically connected to the detection elements. The sleeve body is wrapped around the outer peripheral wall of the liquid supply pipeline. Each detection element is arranged in the interior of the sleeve body and is arranged in a circumferential interval along the inner peripheral wall of the sleeve body. Any two adjacent detection elements can be conductive through the leaked heat exchange medium. The detection circuit outputs a liquid leakage signal after detecting a conduction current. The leaked heat exchange medium at any position of the liquid supply pipeline flows into the interval region of the corresponding two adjacent detection elements to form a conduction path. The detection circuit outputs the liquid leakage signal after detecting the conduction current, so that the liquid leakage detection of the whole range of the liquid supply pipeline is realized.

Description

Technical Field

[0001] This application 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] Liquid cooling temperature control is the mainstream temperature control method for energy storage devices. It uses liquid supply pipelines laid inside the tank to circulate and transport heat exchange medium to achieve temperature regulation of the internal battery clusters and ensure that the battery clusters operate stably within a suitable temperature range.

[0003] During long-term operation, liquid supply pipelines are susceptible to leakage due to vibration, aging, and corrosion. If not investigated and dealt with in a timely manner, this can easily lead to safety risks such as short circuits and equipment corrosion. Currently, leakage detection mostly adopts point-based sensor deployment schemes, which can only cover a limited local area around the pipeline. The leaking medium needs to flow along the pipe wall to the detection element at the preset position to trigger a signal, resulting in a delayed leakage response and insufficient detection reliability. Furthermore, it is difficult to achieve full coverage monitoring of the circumference of the pipeline, resulting in detection blind spots. Utility Model Content

[0004] In view of the above problems, this application provides an energy storage device, an energy storage system and a charging network, which can alleviate the technical problems of existing energy storage device liquid supply pipeline leakage detection schemes, such as detection blind spots, leakage response lag and insufficient detection reliability.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this application provides an energy storage device, including a housing, a battery cluster, a liquid supply pipeline, and a leakage detection assembly; the battery cluster is disposed within the housing; the liquid supply pipeline is disposed within the housing and is used to supply heat exchange medium to the battery cluster; the leakage detection assembly includes a sleeve, at least two detection elements, and a detection circuit electrically connected to each of the detection elements; the sleeve surrounds and covers the outer peripheral wall of the liquid supply pipeline; each of the detection elements is disposed inside the sleeve and is arranged circumferentially at intervals along the inner peripheral wall of the sleeve, any two adjacent detection elements can be connected through the leaked heat exchange medium, and the detection circuit outputs a leakage signal after detecting the conduction current.

[0006] In the technical solution of this application embodiment, by arranging multiple detection elements at intervals along the circumference of the sleeve body, and in conjunction with the assembly structure that surrounds the sleeve body, when the liquid supply pipeline leaks, the seeping heat exchange medium will flow into the gap between the inner circumferential wall of the sleeve body and the outer circumferential wall of the liquid supply pipeline, and quickly diffuse and fill the gap between two adjacent detection elements, so that the two originally insulated detection elements form a conductive path through the conductive heat exchange medium. After the detection circuit detects the conduction current, it can output a leakage signal to realize the leakage detection of the entire circumference of the liquid supply pipeline. Leakage at any circumferential position of the liquid supply pipeline at the sleeve body can be quickly identified, and an alarm can be triggered in the early stage of leakage, effectively avoiding the safety hazards such as battery short circuit and structural corrosion caused by the expansion of leakage.

[0007] In some embodiments, the detection element protrudes radially toward the interior of the sleeve relative to the inner peripheral wall of the sleeve.

[0008] By adopting the above technical solution and through the radially inward protruding structural design of the detection element, the distance between the detection element and the pipeline leakage location is effectively reduced, the conduction threshold of trace leakage is lowered, the sensitivity and response speed of leakage detection are significantly improved, and early warning of leakage can be achieved.

[0009] In some embodiments, the inner peripheral wall of the sleeve is provided with an annular mounting groove, and the detection element is embedded in the mounting groove.

[0010] By adopting the above technical solution, the detection element is embedded in the annular mounting groove, which enables precise positioning and stable limiting of the detection element, enhances the overall structural stability of the leakage detection assembly, and avoids missed detection and detection failure caused by the displacement of the detection element.

[0011] In some embodiments, the detection element is interference-fitted into the mounting groove.

[0012] By adopting the above technical solution, the assembly process is simplified through interference fit assembly, thereby improving assembly efficiency. Furthermore, a sealed fit is achieved between the detection element and the side wall of the mounting groove, eliminating interference from liquid accumulation in the gap, maintaining stable detection signals over a long period, and extending the service life of the component.

[0013] In some embodiments, the detection element is adhered to the wall of the mounting groove.

[0014] By adopting the above technical solutions, the bonding process is adaptable to various materials of sleeves and detection elements, making it more versatile and with higher connection reliability.

[0015] In some embodiments, the leakage detection assembly further includes an insulating pad disposed between two adjacent detection elements.

[0016] By adopting the above technical solution, the solid insulation structure of the pad can reliably isolate two adjacent detection elements, and the pad can effectively limit and maintain the circumferential insulation distance between adjacent detection elements, avoiding false triggering caused by changes in the inter-electrode distance due to deformation of the detection elements by external forces and circumferential displacement, and ensuring reliable insulation of the detection circuit under normal conditions.

[0017] In some embodiments, the pad has an arcuate wall surface that faces radially toward the interior of the sleeve, and the arcuate wall surface contacts two adjacent detection elements on opposite sides of the sleeve in the circumferential direction.

[0018] By adopting the above technical solution, when leakage occurs in the liquid supply pipeline, the leaked heat exchange medium can spread rapidly in the circumference along the curved surface of the arc wall, accelerating the rapid diffusion and flow of the leaking liquid towards the detection elements on both sides, and shortening the liquid accumulation time required for the detection elements to conduct.

[0019] In some embodiments, the pad protrudes radially toward the interior of the sleeve relative to the inner peripheral wall of the sleeve, and the detection element protrudes radially toward the interior of the sleeve relative to the arcuate wall surface.

[0020] By adopting the above technical solution, the pad and the detection element form a stepped protrusion structure, that is, the inner end face of the detection element is the part of the leakage detection component closest to the liquid supply pipeline; the leaked heat exchange medium flows along the pipe wall and will preferentially contact the detection element, shortening the contact path between the liquid and the detection element.

[0021] In some embodiments, the pad is embedded in the mounting groove, and the opposite ends of the pad along the axial direction of the sleeve are respectively flush with the corresponding ends of the detection element.

[0022] By adopting the above technical solution, the axial ends of the two are flush, that is, each pad and detection element tightly fills the installation groove, effectively preventing the leaked heat exchange medium from seeping into the installation groove and causing misleading communication between two adjacent detection elements.

[0023] In some embodiments, the detection element is made of a corrosion-resistant material.

[0024] By adopting the above technical solution, the detection element is made of stainless steel or titanium alloy. Both materials have stable electrical conductivity, are resistant to coolant corrosion, and have strong oxidation resistance.

[0025] In some embodiments, the detection element has an inner end face facing the liquid supply line, and the circumferential distance between any two adjacent inner end faces of the detection element is between 1 mm and 3 mm along the circumferential direction of the sleeve.

[0026] By adopting the above technical solution, the circumferential spacing is controlled within the range of 1~3mm, balancing the anti-interference capability and the leakage detection sensitivity. This avoids false alarms caused by environmental impurities and enables rapid triggering of detection for minute leaks, thereby improving detection accuracy.

[0027] In some embodiments, the dimension of each detection element in the circumferential direction of the sleeve is between 10 and 20 mm.

[0028] By adopting the above technical solution, the circumferential dimension of the detection element 402 is controlled within the range of 10~20mm, which not only ensures sufficient leakage contact area and stable detection signal of the detection element, but also allows multiple detection elements to be arranged circumferentially on the sleeve, taking into account both detection accuracy and coverage.

[0029] In some embodiments, the detection circuit has a power supply component, and any two adjacent detection elements are electrically connected to the power supply component to form a detection loop.

[0030] By adopting the above technical solution, when leakage occurs between any two adjacent detection elements, their respective dedicated detection circuits can be individually triggered to generate current changes.

[0031] In some embodiments, the detection circuit further includes a signal processing component and an alarm unit; any two adjacent detection elements are connected through the leaked heat exchange medium to input a leakage signal to the signal processing component, which is used to receive the leakage signal and drive the alarm unit to operate.

[0032] By adopting the above technical solution, when leakage occurs in the liquid supply pipeline, the heat exchange medium conducts to the adjacent detection element, and the circuit generates a continuous electrical signal and transmits it to the signal processing component. Then, the signal processing component drives the alarm unit to issue an audible and visual alarm.

[0033] In some embodiments, the detection element has a connecting lead, and the housing is provided with a through hole for accommodating the connecting lead.

[0034] By adopting the above technical solution, the wire hole provides limiting protection for the connecting wire, preventing the connecting wire from being corroded by the heat exchange medium and mechanically pulled, and avoiding wire breakage and short circuit faults.

[0035] In some embodiments, the sleeve is flexible.

[0036] By adopting the above technical solution, the sleeve itself has a certain elastic deformation capability, which can be adapted to liquid supply pipelines of different diameters within a certain range, thus making it more adaptable.

[0037] In some embodiments, the liquid supply pipeline includes a pipeline connector and an outer pipe for conveying the heat exchange medium. The pipeline connector is connected to the outer pipe, and the sleeve at least partially covers the outer peripheral wall of the pipeline connector and at least partially covers the outer peripheral wall of the outer pipe.

[0038] By adopting the above technical solution, the pipe joint and the outer pipe are connected by insertion. The gap between the two is the highest risk point for pipe leakage. The sleeve covers the outer wall of the pipe joint and the adjacent outer pipe. Then, the gap between the pipe joint and the outer pipe is covered by the sleeve, realizing real-time monitoring of high-risk points.

[0039] In some embodiments, the outer tube is spaced apart from each of the detection elements along the axial direction of the sleeve, forming a gap.

[0040] By adopting the above technical solution, the gap can prevent the metal outer tube from touching the detection element and causing a short circuit false alarm, thus improving the reliability of detection.

[0041] In some embodiments, the gap is d1, where 0.1mm ≤ d1 ≤ 0.3mm.

[0042] By adopting the above technical solution, the axial gap between the outer tube and the detection element is controlled within 0.1mm~0.3mm. This size range takes into account both assembly feasibility and the ability to detect minor leaks.

[0043] In some embodiments, the axial length of the outer tube inserted into the sleeve is not less than 5 mm.

[0044] By adopting the above technical solution, the axial contact area between the outer circumferential wall of the outer tube and the sleeve is guaranteed, and the radial clamping friction force after the sleeve and the outer tube are assembled is increased. Under long-term pipeline vibration and fluid impact conditions, the axial slippage and circumferential rotation of the sleeve relative to the outer tube can be suppressed, and the two can be prevented from loosening and separating.

[0045] In some embodiments, the inner peripheral wall of the sleeve is provided with a sealing structure that abuts against the outer peripheral wall of the liquid supply pipeline.

[0046] By adopting the above technical solution, the sealing structure extends around the entire circumference of the sleeve and abuts against the outer circumferential wall of the liquid supply pipeline. The sealing structure can seal the circumferential assembly gap between the inner circumferential wall of the sleeve and the outer circumferential wall of the liquid supply pipeline, preventing water vapor, dust and condensate in the external environment from entering from the gap at the end of the sleeve, avoiding the external conductive medium from colliding with adjacent detection elements, and greatly reducing the probability of false triggering and false alarm under leak-free conditions.

[0047] In some embodiments, the pipe connector is inserted into the outer pipe, and the sealing structure includes a first annular protrusion abutting against the outer peripheral wall of the pipe connector. An annular cavity is formed between the inner peripheral wall of the sleeve and the outer peripheral wall of the pipe connector, and each detection element is at least partially located in the annular cavity.

[0048] By adopting the above technical solution, the annular cavity completely covers the gap between the pipe joint and the outer pipe. The heat exchange medium that seeps out at the joint will flow directly into the annular cavity, diffuse along the circumference and fill the gap between two adjacent detection elements, stably triggering the continuity detection.

[0049] In some embodiments, the first annular protrusion protrudes radially toward the interior of the sleeve relative to the detection element.

[0050] By adopting the above technical solution, the radial inner end of the first annular protrusion is closer to the outer peripheral wall of the pipe joint, and the first annular protrusion abuts against the pipe joint, thereby avoiding direct contact between the detection element and the pipe joint, preventing the metal pipe joint from directly conducting the detection elements, and improving the reliability of leakage detection.

[0051] In some embodiments, the sealing structure further includes a second annular protrusion abutting against the outer peripheral wall of the outer tube.

[0052] By adopting the above technical solution, the second annular protrusion abuts against the outer circumferential wall of the outer pipe in a circumferential direction, forming a continuous annular sealing barrier, which effectively seals and blocks the joint insertion position where leakage is prone to occur.

[0053] Secondly, embodiments of this application also provide an energy storage system, including a power conversion device and the energy storage device, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0054] Thirdly, embodiments of this application also provide a charging network, including a charging pile and the energy storage device or the energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0055] 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

[0056] 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: Figure 1 This application provides schematic diagrams of the structure of an energy storage system according to some embodiments. Figure 2 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application; Figure 3 This is a schematic diagram of the structure of a charging network provided in some embodiments of this application; Figure 4 This is a schematic diagram of a leakage detection component according to an embodiment of the present application, arranged at an angle on a liquid supply pipeline; Figure 5 This is a schematic diagram of a leakage detection component according to an embodiment of the present application, arranged on a liquid supply pipeline from another angle. Figure 6 This is a cross-sectional view of a leakage detection component arranged on a liquid supply pipeline according to an embodiment of this application at one angle. Figure 7 This is a schematic diagram of the structure of a leakage detection component according to an embodiment of this application; Figure 8 This is a cross-sectional structural schematic diagram of a leakage detection component according to an embodiment of this application; Figure 9 This is a schematic diagram of the axial structure of a leakage detection component according to an embodiment of this application; Figure 10 This is a schematic diagram of the electrical connection between two adjacent detection elements according to an embodiment of this application; Figure 11 This is a schematic diagram of the structure of each detection element connected to the detection circuit according to an embodiment of this application.

[0057] The following are the labeling elements in the figure: 1. Energy storage devices; 2. Energy conversion systems; 3. Power generation equipment; 4. Charging piles; 10. Housing; 20. Battery cluster; 30. Liquid supply line; 301. Pipe connector; 302. Outer pipe; 40. Leakage detection component; 401, Sleeve body; 4011, Wire hole; 4012, First annular protrusion; 402. Detection element; 4021. Connecting lead; 4022. Inner end face; 403. Detection circuit; 4031. Power supply assembly; 4032. Signal processing assembly; 5. Connector; 6. Mounting groove; 7. Spacer; 701. Arc-shaped wall; 8. Annular cavity; 9. External line group. Detailed Implementation

[0058] 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.

[0059] 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, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0061] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0062] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0063] In the description of the embodiments of this application, technical terms such as "first" and "second" 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.

[0064] 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.

[0065] 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 have an "or" relationship.

[0066] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0067] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "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, or be constructed and operated 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, the 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0069] Currently, new energy battery systems are iterating and upgrading towards high energy density, high integration, and high-rate charging and discharging. During battery operation, the heat generation power and thermal management load are continuously increasing. Liquid cooling thermal management solutions have become the mainstream technical route for thermal management of power batteries and energy storage batteries due to their high heat exchange efficiency and excellent temperature control accuracy. As the core transport carrier of heat exchange medium in the liquid cooling system, the sealing reliability and leakage protection capability of the liquid supply pipeline directly determine the operational safety and long-term service stability of the entire energy storage device.

[0070] Conventional leak detection schemes often employ point-based detection element deployment or single-sided surface attachment structures, which can only cover a limited local area around the pipeline, making it difficult to achieve full coverage monitoring of the pipeline's circumference and resulting in detection blind spots. The leaking medium needs to flow along the pipe wall to a preset detection element to trigger a signal, leading to a delayed leak response and insufficient detection reliability. If a leak is not detected quickly, the heat exchange medium can seep into the battery cluster, easily causing insulation failure, short circuits, and other safety accidents, seriously affecting the operational reliability of the energy storage device.

[0071] To improve the coverage and operational reliability of leak detection, the industry has carried out multiple rounds of optimization and iteration on the design scheme of leak detection. The mainstream improvement paths include: increasing the layout area of ​​detection elements to expand the detection range of pipelines; increasing the number of detection elements and arranging multiple independent detection points along the circumference of the pipeline. Although the above schemes can reduce the circumferential detection gap to a certain extent, they cannot form a continuous and complete circumferential detection surface, and there are still monitoring blind spots in the circumference of the liquid supply pipeline.

[0072] Based on the above considerations, in order to solve the problems of incomplete circumferential coverage and blind spots in existing leakage detection solutions, the leakage detection component of this application adopts a sleeve covering the outer circumferential wall of the liquid supply pipeline. At least two detection elements are arranged at intervals along the inner circumferential wall inside the sleeve, and two adjacent detection elements and the detection circuit form an independent detection loop. Relying on the annular covering structure of the sleeve, full circumferential coverage of the outer circumferential wall of the liquid supply pipeline is achieved, eliminating the detection dead spots in the circumferential direction of the pipeline. Leakage at any circumferential position of the pipeline can quickly trigger the conduction of adjacent detection elements in the corresponding area.

[0073] For ease of explanation, the following embodiments use an energy storage system according to an embodiment of this application as an example.

[0074] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage system provided in an embodiment of this application.

[0075] In some embodiments, this application provides an energy storage system, which may include one or more energy storage devices 1 and a power conversion system 2 (PCS). The power conversion system 2 is used to connect between a power generation device 3, a power grid, a load, and the energy storage device 1. The power generation device 3 generates electrical energy, the energy storage device 1 stores electrical energy, and the power conversion system 2 converts the current input to the energy storage device 1 or the current output from the energy storage device 1 into energy. The electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power conversion system 2, and the electrical energy stored in the energy storage device 1 can also be output to the load or the power grid through the power conversion system 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0076] refer to Figure 2 , Figure 2 The energy storage device 1 provided in this application embodiment includes one or more battery clusters 20 to increase the voltage and capacity of the energy storage device 1. Each battery cluster 20 may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters 20, the multiple battery clusters 20 are connected in parallel to increase the capacity of the energy storage device 1.

[0077] The energy storage device 1 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. The energy storage device 1 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1 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 the use of the energy storage device 1.

[0078] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0079] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters 20, the battery clusters 20 being housed in the cabinet.

[0080] In some embodiments, the energy storage device 1 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.

[0081] 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.

[0082] As an example, the main control module can serve as the battery management unit of the battery cluster 20, used to monitor and manage the battery cluster 20. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster 20. For example, it can control the charging and discharging current and voltage of the battery cluster 20. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0083] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. 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.

[0084] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0085] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0086] refer to Figure 3 , Figure 3 A charging network provided in this application embodiment includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 provides electrical energy to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to electrical equipment (such as a vehicle) to replenish the power of the electrical equipment.

[0087] The energy storage device 1 can be located inside the charging pile 4 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4.

[0088] In some embodiments, reference Figure 2 , Figure 4 , Figure 6 and Figure 7This application provides an energy storage device 1, including a housing 10, a battery cluster 20, a liquid supply pipeline 30, and a leakage detection component 40. The battery cluster 20 is disposed inside the housing 10. The liquid supply pipeline 30 is disposed inside the housing 10 and is used to supply heat exchange medium to the battery cluster 20. The leakage detection component 40 includes a sleeve 401, at least two detection elements 402, and a detection circuit 403 electrically connected to each detection element 402. The sleeve 401 surrounds the outer peripheral wall of the liquid supply pipeline 30. Each detection element 402 is disposed inside the sleeve 401 and is arranged circumferentially at intervals along the inner peripheral wall of the sleeve 401. Any two adjacent detection elements 402 can be connected through the leaked heat exchange medium. After the detection circuit 403 detects the conduction current, it outputs a leakage signal accordingly.

[0089] Specifically, the housing 10 serves as the outer shell of the entire energy storage device 1, with reserved space inside for the installation of battery clusters 20, pipelines, and electrical components, providing structural protection, dustproofing, and fireproofing. Liquid supply pipelines 30 are distributed within the housing 10 in a circulating loop and are installed close to the battery clusters 20. The heat exchange medium within the liquid supply pipelines 30 continuously circulates, regulating the operating temperature of the battery clusters 20 through heat exchange, ensuring stable operation of the battery clusters 20 within a suitable temperature range.

[0090] Leakage detection component 40 is installed at preset key detection points on the liquid supply pipeline 30, such as: pipeline joints, pipeline bends, and sealing joints, which are prone to leakage. It is used to detect leakage at corresponding nodes on the liquid supply pipeline 30 in real time. The sleeve 401 is an annular sleeve structure made of insulating and sealing materials such as silicone rubber and thermoplastic polyurethane (TPU). It is completely wrapped around the outer wall of the liquid supply pipeline 30. After assembly, it is tightly attached to the outer wall of the pipeline, achieving a sealing fit between the two ends of the sleeve 401 and the liquid supply pipeline 30. It can prevent moisture, condensation, and dust from the external environment from entering the sleeve 401 and avoid external factors from interfering with the detection results. Optionally, the heat exchange medium can be a coolant, which can be a high-temperature coolant or a low-temperature coolant. Here, "low-temperature" and "high-temperature" refer to the operating temperature of the battery cluster 20. When the temperature of the battery cluster 20 is too high, the added coolant is at a temperature lower than that of the battery cluster 20, used to cool the battery cluster 20; hence, it is called a low-temperature coolant. When the battery cluster 20 is in a cold operating environment, its temperature is low, and the added coolant is at a temperature higher than that of the battery cluster 20, used to heat and insulate the battery cluster 20; hence, it is called a high-temperature coolant. The supply pipeline 30 can be made of insulating and corrosion-resistant plastic or metal.

[0091] The number of detection elements 402 is at least two. The detection elements 402 are conductive electrode elements, which are evenly spaced along the circumferential direction of the inner peripheral wall of the sleeve 401. Under normal conditions, two adjacent detection elements 402 are separated, and the corresponding circuit of the detection circuit 403 is in an open circuit state, with no current generated. When the liquid supply pipeline 30 leaks, the heat exchange medium with conductive properties seeps out from the pipe wall and flows into the gap between the sleeve 401 and the liquid supply pipeline 30. The liquid diffuses and fills the space between two adjacent detection elements 402, so that the two originally insulated detection elements 402 form a conductive path through the conductive heat exchange medium. The corresponding circuit of the detection circuit 403 then generates a current. After the detection circuit 403 detects the current signal, it can output a leakage signal, realizing real-time detection and accurate judgment of the leakage point of the liquid supply pipeline 30.

[0092] For example, the radial dimension of the sleeve 401 can be set according to the conventional outer diameter of the liquid supply pipeline 30, and the number of detection elements 402 can be set to 3, 4 or more according to the outer diameter of the liquid supply pipeline 30, and evenly distributed along the circumference to cover the leakage scenario of the entire circumference of the liquid supply pipeline 30. A small amount of leakage at any position in the circumference of the liquid supply pipeline 30 can trigger the conduction of two adjacent detection elements 402 at the corresponding position, eliminating the blind spot of traditional single-point detection and effectively improving the reliability of leakage detection.

[0093] Understandably, the number of leak detection components 40 installed on the liquid supply line 30 can be one or more. For example, when multiple leak detection components 40 are installed on the liquid supply line 30, the multiple leak detection components 40 are respectively located at high-risk leakage points such as joints, bends, and branch interfaces of the liquid supply line 30. The multiple leak detection components 40 independently detect the leakage of the liquid supply line 30 at their respective detection points, thereby further improving the operational reliability of the liquid supply line 30.

[0094] The energy storage device 1 of this application, by arranging multiple detection elements 402 at intervals along the circumference of the inner casing 401, and in conjunction with the assembly structure that surrounds the casing 401, when a leak occurs in the liquid supply pipeline 30, the seeping heat exchange medium will flow into the gap between the inner circumferential wall of the casing 401 and the outer circumferential wall of the liquid supply pipeline 30, and quickly diffuse and fill the interval area between two adjacent detection elements 402, so that the two originally insulated detection elements 402 form a conductive path through the conductive heat exchange medium. After the detection circuit 403 detects the conduction current, it can output a leakage signal to realize the leakage detection of the entire circumference of the liquid supply pipeline 30. Leaks at any position along the circumference of the liquid supply pipeline 30 can be quickly identified, and an alarm can be triggered in the early stage of leakage, effectively avoiding the safety hazards such as battery short circuit and structural corrosion caused by the expansion of leakage.

[0095] In some embodiments, the sleeve 401 is flexible and possesses a certain range of elastic deformation capability. During assembly, the sleeve 401 is fitted onto the liquid supply pipeline 30 and relies on its own elastic recoil force to tightly adhere to the outer peripheral wall of the liquid supply pipeline 30 to achieve a seal, preventing external moisture from entering the detection area and reducing false alarms. Consequently, the sleeve 401 can be adapted to liquid supply pipelines 30 of different specifications within a certain pipe diameter range, avoiding the need for custom molding for a single diameter, thus broadening the product's compatibility.

[0096] refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, the detection element 402 protrudes radially toward the interior of the sleeve 401 relative to the inner peripheral wall of the sleeve 401.

[0097] The detection element 402 protrudes radially toward the center of the sleeve 401, i.e., the side of the liquid supply pipeline 30, relative to the inner peripheral wall of the sleeve 401. This makes the detection element 402 closer to the outer peripheral wall of the liquid supply pipeline 30, effectively reducing the radial distance between the detection element 402 and the outer peripheral wall of the liquid supply pipeline 30. When a small amount of leakage occurs in the liquid supply pipeline 30, the leaked heat exchange medium flows circumferentially along the outer wall of the pipeline, preferentially contacting the surface of the protruding detection element 402, and quickly spreading and filling the gap area between two adjacent detection elements 402, realizing the conduction of the detection circuit 403, thereby improving the detection capability of the detection component for minor leakage.

[0098] By using the radially inward protruding structure of the detection element 402, the distance between the detection element 402 and the pipeline leakage location is effectively reduced, the conduction threshold of trace leakage is lowered, the sensitivity and response speed of leakage detection are significantly improved, and early warning of leakage can be achieved.

[0099] refer to Figures 7 to 9 In some embodiments, the inner peripheral wall of the sleeve 401 is provided with an annular mounting groove 6, and the detection element 402 is embedded in the mounting groove 6.

[0100] A ring-shaped mounting groove 6 is formed on the inner circumferential wall of the sleeve 401. The detection element 402 can be embedded in the mounting groove 6 and protrude exposed on the side facing the liquid supply line 30. The mounting groove 6 effectively limits each detection element 402 and serves as the installation reference for each detection element 402, avoiding misalignment and axial displacement of each detection element 402 during assembly. At the same time, the mounting groove 6 can cover the side of the detection element 402, reducing the intrusion of leaking liquid into the detection element 402 and preventing problems such as element warping or displacement.

[0101] By using the annular mounting groove 6 to embed and assemble the detection element 402, the detection element 402 can be accurately positioned and stably limited, which enhances the overall structural stability of the leakage detection assembly 40 and avoids the detection element 402 from shifting, thus preventing missed detection and detection failure.

[0102] In some embodiments, the detection element 402 is interference-fitted into the mounting groove 6.

[0103] The axial dimension of the detection element 402 is slightly larger than the distance between the two axial side walls of the mounting groove 6 on the sleeve 401. Utilizing the elasticity of the flexible material of the sleeve 401, after the detection element 402 is embedded and pressed into the mounting groove 6, the side wall of the mounting groove 6 elastically contracts and hugs the detection element 402. The insertion of the detection element 402 can be completed without the need for additional connection structures. The interference fit can fill the assembly gap between the detection element 402 and the mounting groove 6, inhibiting the heat exchange medium and water vapor from seeping into the groove wall of the mounting groove 6 and the side wall of the detection element 402, and avoiding misleading communication and element corrosion caused by liquid accumulation in the gap.

[0104] The assembly process is simplified by using an interference fit, which improves assembly efficiency. In addition, a sealed fit is achieved between the detection element 402 and the side wall of the mounting groove 6, eliminating interference from liquid accumulation in the gap, maintaining stable detection signals over a long period of time, and extending the service life of the component.

[0105] In some embodiments, the detection element 402 is bonded to the groove wall of the mounting groove 6.

[0106] Specifically, waterproof, insulating and anti-corrosion adhesive is applied to the bottom and sidewalls of the mounting groove 6. After pressing the detection element 402 into the mounting groove 6, it is allowed to stand and cure. The adhesive bonds and fixes the detection element 402 to the sleeve 401. The adhesive fills the assembly gap to form a sealing layer, reducing false detections caused by condensation and liquid accumulation, and improving the structural stability and anti-interference ability of the leakage detection component 40 under complex working conditions.

[0107] The bonding process is compatible with various materials for the sleeve 401 and the detection element 402, making it more versatile and with higher connection reliability.

[0108] refer to Figures 7 to 9 In some embodiments, the leakage detection assembly 40 further includes an insulating pad 7 disposed between two adjacent detection elements 402.

[0109] Specifically, the pad 7 is made of insulating, corrosion-resistant, and waterproof material, and is installed between the circumferentially spaced positions of two adjacent detection elements 402. Under normal conditions, the solid insulating structure of the pad 7 reliably isolates the two adjacent detection elements 402, and the pad 7 can effectively limit and maintain the circumferential insulating distance between adjacent detection elements 402, avoiding false continuity caused by changes in the inter-electrode distance due to deformation or circumferential displacement of the detection elements 402 by external forces, thus ensuring reliable insulation of the detection circuit under normal conditions.

[0110] When leakage occurs in the liquid supply line 30, the leaked heat exchange medium can be supported and spread circumferentially on the surface of the pad 7, preventing the leaked liquid from dripping and flowing away directly. It effectively gathers the small amount of leaked liquid and diffuses it to the space between the two adjacent detection elements 402, which helps to accelerate the electrical conduction speed.

[0111] refer to Figure 7 In some embodiments, each pad 7 and each detection element 402 are arranged alternately along the inner circumferential wall of the sleeve 401, which can provide structural support for the sleeve 401 and improve the overall structural stability and vibration resistance of the leakage detection assembly 40.

[0112] refer to Figure 9 In some embodiments, the pad 7 has an arcuate wall 701 that faces the interior of the sleeve 401 radially, and the arcuate wall 701 contacts two adjacent detection elements 402 on opposite sides of the sleeve 401 in the circumferential direction.

[0113] Understandably, the arc-shaped wall 701 is concave towards the outside of the sleeve 401 radially. The arc-shaped wall 701 can guide the leakage liquid. When the liquid supply pipeline 30 leaks, the leaked heat exchange medium can spread rapidly circumferentially along the curved guiding effect of the arc-shaped wall 701, accelerating the rapid diffusion and flow of the leakage liquid towards the detection elements 402 on both sides, shortening the liquid accumulation time required for the detection elements 402 to conduct, enabling the detection circuit 403 to quickly identify the leakage signal and complete the triggering, further improving the response rate and sensitivity of the leakage detection.

[0114] Reference Figure 9 In some embodiments, the pad 7 protrudes radially toward the interior of the sleeve 401 relative to the inner peripheral wall of the sleeve 401, and the detection element 402 protrudes radially toward the interior of the sleeve 401 relative to the arcuate wall 701.

[0115] The pad 7 protrudes into the sleeve 401 from the inner peripheral wall of the sleeve 401. The detection element 402 protrudes further into the sleeve 401 relative to the arc-shaped wall 701 of the pad 7. Thus, the pad 7 and the detection element 402 form a stepped protrusion structure. That is, the inner end face 4022 of the detection element 402 (the end face facing the liquid supply pipeline 30) is the part of the leakage detection assembly 40 closest to the liquid supply pipeline 30. The leaked heat exchange medium flows along the pipe wall and will preferentially contact the detection element 402, shortening the contact path between the liquid and the detection element 402.

[0116] Understandably, the protruding structure of the pad 7 relative to the inner peripheral wall of the sleeve 401 reduces the radial distance between the arc-shaped wall 701 of the pad 7 and the outer peripheral wall of the liquid supply pipe 30, compressing the cavity volume formed by the two adjacent detection elements 402, the arc-shaped wall 701, and the outer peripheral wall of the liquid supply pipe 30. Only a small amount of leaked liquid is needed to fill the circumferential gap between the two adjacent detection elements 402, facilitating the rapid establishment of a conductive path and the activation of the detection circuit 403. This effectively reduces the triggering amount of heat exchange medium required for leak detection and significantly improves the sensitivity of the detection assembly to minor leaks in the pipeline.

[0117] refer to Figure 9 In some embodiments, the thickness t of the detection element 402 relative to the protruding portion of the arcuate wall 701 along the radial direction of the sleeve 401 is between 0.1 mm and 0.3 mm.

[0118] The thickness t can be any value among 0.1mm, 0.15mm, 0.2mm, 0.25mm, and 0.3mm; this ensures that a small amount of leakage liquid preferentially contacts the detection element 402, guides the liquid to spread evenly with the help of a reasonable height difference, and shortens the conduction response time; it can also compress the cavity volume between two adjacent detection elements 402 and reduce the detection trigger threshold.

[0119] refer to Figures 7 to 9 In some embodiments, the pad 7 is embedded in the mounting groove 6, and the two ends of the pad 7 along the axial direction of the sleeve 401 are flush with the corresponding ends of the detection element 402.

[0120] The pad 7 and the detection element 402 are housed together in the same annular mounting groove 6, which limits their assembly. The axial sidewall of the mounting groove 6 can simultaneously limit and constrain both ends of the pad 7 and the detection element 402. During the operation of the energy storage device, when subjected to equipment vibration and long-term scouring by the heat exchange medium, the pad 7 and the detection element 402 are less likely to experience individual axial movement, loosening, or displacement, thus significantly improving the overall structural stability of the circumferential arrangement. The pad 7 and the detection element 402 use the mounting groove 6 as the same mounting reference, keeping their axial ends flush, unifying the axial assembly reference, reducing assembly errors, and simplifying the assembly process.

[0121] Understandably, refer to Figure 8 The pads 7 and the detection elements 402 are arranged along the circumferential direction of the sleeve 401, and their axial ends are flush. This ensures that each pad 7 and detection element 402 tightly fills the mounting groove 6, effectively preventing leaked heat exchange medium from seeping into the mounting groove 6 and causing mis-communication between adjacent detection elements 402. Leaked liquid can spread and flow on the arc-shaped wall 701 and the inner end face of the detection element 402, quickly filling the gap between adjacent detection elements 402.

[0122] In some embodiments, the material of the detection element 402 is corrosion resistant.

[0123] For example, the detection element 402 is made of 316 stainless steel or titanium alloy. Both materials have stable electrical conductivity, are resistant to coolant corrosion, and have strong oxidation resistance. Stainless steel is simple to process and has a lower cost, making it suitable for conventional energy storage liquid cooling scenarios. Titanium alloy has a higher corrosion resistance level and is suitable for harsh working conditions such as high-concentration media and high-humidity closed chambers. Both materials can keep the surface of the detection element 402 smooth and rust-free for a long time.

[0124] refer to Figure 10 In some embodiments, the detection element 402 has an inner end face 4022 facing the liquid supply line 30, and the circumferential distance L between any two adjacent inner end faces 4022 of the sleeve 401 is between 1 mm and 3 mm.

[0125] Understandably, if the circumferential distance L between the inner end faces 4022 of two adjacent detection elements 402 is too small, condensation and dust in the air can easily cause false signaling between the detection elements 402; if the circumferential distance L is too large, more leakage liquid is required to fill the gap between the detection elements 402, resulting in a longer recognition time and insufficient detection sensitivity. By controlling the circumferential distance L between the inner end faces 4022 of two adjacent detection elements 402 within the range of 1~3mm, the anti-interference capability and leakage detection sensitivity are balanced. This avoids false alarms caused by environmental impurities and enables rapid triggering of detection for minute leaks, thereby improving detection accuracy.

[0126] For example, the circumferential distance L between the inner end faces 4022 of two adjacent detection elements 402 can be any value among 1mm, 1.5mm, 2mm, 2.5mm, and 3mm.

[0127] refer to Figure 9 In some embodiments, the circumferential dimension W of each detection element 402 in the circumferential direction of the sleeve 401 is between 10 and 20 mm.

[0128] Understandably, when the circumferential dimension W of a single detection element 402 is set to be small, the contact area with the leaking liquid is small, and the conduction signal is weak and easily interfered with; when the circumferential dimension W is set to be large, it will occupy too much circumferential space of the sleeve 401, and the number of detection elements 402 that can be arranged under the same size sleeve 401 will be reduced, and detection blind spots are likely to occur.

[0129] By controlling the circumferential dimension W of the detection element 402 within the range of 10~20mm, it is possible to ensure that the leakage contact area of ​​the detection element 402 is sufficient and the detection signal is stable, while multiple detection elements 402 can be arranged circumferentially on the sleeve 401, thus balancing detection accuracy and coverage.

[0130] refer to Figure 10 and Figure 11 In some embodiments, the detection circuit 403 includes a power supply component 4031, and any two adjacent detection elements 402 are electrically connected to the power supply component 4031 to form a detection loop.

[0131] Specifically, the power supply assembly 4031 is provided with multiple independent output terminals. Each detection element 402 is independently electrically connected to the corresponding terminal of the power supply assembly 4031 through an independent lead. The detection elements 402 arranged in sequence along the circumference of the sleeve 401 are paired in pairs. Two adjacent detection elements 402 form a complete detection loop. Then, the detection circuit 403 forms multiple detection loops. Each detection loop is independent of each other and the signals do not interfere with each other.

[0132] For example, the power supply assembly 4031 has terminals matching the number of detection elements 402; each detection element 402 has a separate signal line leading out, which is connected to a different terminal of the power supply assembly 4031. Taking a circumferentially arranged electrode sequence (electrode A, electrode B, electrode C, electrode D) as an example: electrodes A and B are connected to two terminals of the power supply assembly 4031 respectively, forming a first detection circuit; electrodes B and C are connected to the other two terminals of the power supply assembly 4031 respectively, forming a second detection circuit; electrodes C and D are connected to the other two terminals of the power supply assembly 4031, forming a third detection circuit. Then, when leakage occurs between any two adjacent detection elements 402, their respective dedicated detection circuits can be individually triggered to generate a current change.

[0133] refer to Figure 11 In some embodiments, the detection circuit 403 further includes a signal processing component 4032 and an alarm unit; any two adjacent detection elements 402 are connected through the leaked heat exchange medium to input a leakage signal to the signal processing component 4032, which is used to receive the leakage signal and drive the alarm unit to work.

[0134] Under normal conditions, adjacent detection elements 402 are insulated from each other, there is no current in the circuit, the signal processing component 4032 cannot receive the effective leakage signal, and the alarm unit does not work; when leakage occurs in the liquid supply pipeline 30, after the heat exchange medium conducts to the adjacent detection element 402, the circuit generates a continuous electrical signal and transmits it to the signal processing component 4032, and then the signal processing component 4032 drives the alarm unit to issue an audible and visual alarm.

[0135] The alarm unit can provide an early warning when leakage occurs, enabling early fault handling and preventing major safety accidents such as battery short circuits and cabin corrosion caused by the continuous spread of leakage, thereby improving the overall operational safety of the energy storage device 1.

[0136] For example, the detection circuit 403 is equipped with an external communication interface. The detection circuit 403 is interconnected with the fire protection system and temperature sensor signal of the enclosure 10 through the communication interface. When the detection circuit 403 simultaneously collects the leakage conduction signal and the temperature exceeding the threshold signal, the detection circuit sends a linkage command to the fire protection system to simultaneously execute the audible and visual alarm, cut off the circulation of the heat exchange medium in the liquid supply pipeline 30, power off the equipment, and start the fire extinguishing sprinkler operation.

[0137] refer to Figure 7 and Figure 8 The detection element 402 has a connecting lead 4021, and the sleeve 401 is provided with a wire hole 4011 for accommodating the connecting lead 4021.

[0138] Specifically, each detection element 402 is provided with a connecting lead 4021, which is used to connect with the detection circuit 403; a wire-passing hole 4011 is opened in the wall of the sleeve 401, and the connecting lead 4021 is hidden inside the hole and not exposed inside the detection cavity; the wire-passing hole 4011 provides limiting protection for the connecting lead 4021, preventing the connecting lead 4021 from being corroded by the heat exchange medium, mechanically pulled, and preventing lead open circuit or short circuit faults.

[0139] In one specific embodiment, reference Figure 7 The connecting leads 4021 of each detection element 402 are gathered inside the sleeve 401 to form an external circuit group 9. The external circuit group 9 extends outward along the radial direction of the sleeve 401 through the outer peripheral wall of the sleeve 401, extends to the outside of the sleeve 401, and is electrically connected to the detection circuit 403.

[0140] With a single main line leading out, only a single main line needs to be connected during the assembly of the whole machine to complete the electrical connection of each detection element 402, detection circuit 403, and power supply component 4031. This greatly simplifies the on-site wiring process, improves the efficiency of assembly and subsequent maintenance, and the integrated wiring harness layout is more suitable for the compact wiring space inside the energy storage box.

[0141] In some embodiments, the inner peripheral wall of the sleeve 401 is provided with a sealing structure that abuts against the outer peripheral wall of the liquid supply line 30.

[0142] The sealing structure extends circumferentially around the sleeve 401 and abuts against the outer peripheral wall of the liquid supply pipeline 30. The sealing structure can seal the circumferential assembly gap between the inner peripheral wall of the sleeve 401 and the outer peripheral wall of the liquid supply pipeline 30, preventing water vapor, dust and condensate in the external environment from entering from the gap at the end of the sleeve 401, avoiding the external conductive medium from colliding with adjacent detection elements 402, and greatly reducing the probability of false triggering and false alarm under leak-free conditions.

[0143] Meanwhile, the sealing structure can constrain the heat exchange medium seeping out at the detection node of the liquid supply pipeline 30, preventing the leaking liquid from overflowing outward from the assembly gap between the sleeve 401 and the liquid supply pipeline 30, so that the leaking liquid is intercepted and gathered in the interval area between two adjacent detection elements 402, ensuring that even a small amount of leakage can stably trigger the continuity detection.

[0144] refer to Figures 4 to 6 In some embodiments, the liquid supply line 30 includes a line connector 301 and an outer pipe 302 for conveying the heat exchange medium. The line connector 301 is connected to the outer pipe 302. The sleeve 401 at least partially covers the outer peripheral wall of the line connector 301 and at least partially covers the outer peripheral wall of the outer pipe 302.

[0145] Specifically, the pipe joint 301 and the outer pipe 302 are connected by an insertion assembly, and the gap between the two is the highest risk point for pipe leakage; the sleeve 401 spans and covers the outer peripheral wall of the pipe joint 301 and the adjacent outer pipe 302, and then the gap between the pipe joint 301 and the outer pipe 302 is covered inside the sleeve 401, realizing real-time monitoring of high-risk points.

[0146] refer to Figure 6 In some embodiments, the outer tube 302 is spaced apart from each detection element 402 along the axial direction of the sleeve 401, forming a gap d1.

[0147] Understandably, the sleeve 401 partially covers the outer peripheral wall of the outer tube 302, and the outer tube 302 is spaced apart from each detection element 402 to form a gap in the axial direction; the gap can prevent the metal outer tube 302 from touching the detection element 402 and causing a short circuit false alarm, thus improving the reliability of detection.

[0148] refer to Figure 6 In some embodiments, 0.1mm ≤ d1 ≤ 0.3mm.

[0149] When the axial clearance d1 between the outer tube 302 and the detection element 402 is too small, assembly tolerances are difficult to control, which can easily cause the outer tube 302 and the detection element 402 to rub against each other. When the clearance d1 is too large, it increases the path of the leaking liquid to the detection element 402, resulting in an increase in detection time. Therefore, the axial clearance between the outer tube 302 and the detection element 402 is controlled within 0.1mm~0.3mm. This size range takes into account both assembly feasibility and the ability to detect minor leaks.

[0150] refer to Figure 6 In some embodiments, the axial length d2 of the outer tube 302 inserted into the sleeve 401 is not less than 5 mm.

[0151] The minimum insertion length d2 of the outer tube 302 extending axially into the sleeve 401 is set to 5mm. On the one hand, this increases the axial contact area between the outer peripheral wall of the outer tube 302 and the sleeve 401, and enhances the radial clamping friction after the sleeve 401 and the outer tube 302 are assembled. Under long-term pipeline vibration and fluid impact conditions, this can suppress axial slippage and circumferential rotation of the sleeve 401 relative to the outer tube 302, preventing them from loosening and separating. On the other hand, the axial overlap section of 5mm or more can form a sufficiently long axial sealing coverage path, constraining the conductive heat exchange medium leaking from the pipeline, preventing the leaked liquid from overflowing outward from the assembly gaps at both ends of the sleeve 401, and allowing the trace amount of leaked liquid to be intercepted and collected in the detection cavity corresponding to the detection element 402 inside the sleeve 401, stably triggering the conduction detection of the detection element 402, eliminating the problem of missed detection due to liquid leakage, and continuously ensuring the sensitivity of the identification of trace leaks.

[0152] In some embodiments, the pipe connector 301 is inserted into the outer pipe 302, and the sealing structure includes a first annular protrusion 4012 abutting against the outer peripheral wall of the pipe connector 301. An annular cavity 8 is formed between the inner peripheral wall of the sleeve 401 and the outer peripheral wall of the pipe connector 301, and each detection element 402 is at least partially located in the annular cavity 8.

[0153] The first annular protrusion 4012 extends around the entire circumference of the sleeve 401 and abuts against the outer peripheral wall of the pipe joint 301, forming a continuous annular sealing barrier that effectively seals the joint insertion position where leakage is prone to occur.

[0154] refer to Figure 6 The inner peripheral wall of the sleeve 401, the first annular protrusion 4012, the outer peripheral wall of the pipe connector 301, and the end face of the outer pipe 302 together form an annular cavity 8. Each detection element 402 is at least partially housed within this annular cavity 8. Specifically, the detection element 402 is embedded in the mounting groove 6 of the sleeve 401, with the portion of the detection element 402 facing inwards extending into the annular cavity 8. The inner end face 4022 of the detection element 402 facing the pipe is directly opposite the outer peripheral wall of the pipe connector 301, maintaining a stable radial gap with the pipe wall. This annular cavity 8 completely covers the insertion gap between the pipe connector 301 and the outer pipe 302. The heat exchange medium seeping out at the joint flows directly into the annular cavity 8, diffuses circumferentially, and fills the gap between two adjacent detection elements 402, stably triggering the conduction detection of the detection element 402.

[0155] In some embodiments, the first annular protrusion 4012 protrudes toward the interior of the sleeve 401 along the radial direction of the sleeve 401 relative to the detection element 402.

[0156] Understandably, along the radial direction of the sleeve 401, the first annular protrusion 4012 is positioned further inward than the detection element 402, meaning that the radial inner end of the first annular protrusion 4012 is closer to the outer peripheral wall of the pipe connector 301. The first annular protrusion 4012 abuts against the pipe connector 301, thereby preventing the detection element 402 from directly contacting the pipe connector 301 and preventing the metal pipe connector 301 from directly connecting to each detection element 402, thus improving the reliability of leakage detection.

[0157] For example, the sealing structure may also include a second annular protrusion, which is integrally formed on the inner peripheral wall of the sleeve 401 in the area corresponding to the outer tube 302. The second annular protrusion abuts against the outer peripheral wall of the outer tube 302 in the circumferential direction to form a continuous annular sealing barrier, which effectively seals the joint insertion position where leakage is prone to occur.

[0158] refer to Figures 2 to 11 In one specific embodiment of this application, the energy storage device 1 includes a housing 10, a battery cluster 20 disposed in the housing 10, a liquid supply pipeline 30 for conveying heat exchange medium, and a leakage detection component 40 sleeved at a high-risk leakage point of the liquid supply pipeline 30.

[0159] The liquid supply pipeline 30 includes a pipe connector 301 and an outer pipe 302 that are plugged into each other. The pipe connector 301 is inserted into the outer pipe 302, and the gap between the two is a high-risk area for pipeline leakage. The leakage detection component 40 includes a flexible sleeve 401, at least two detection elements 402, multiple insulating pads 7, and a detection circuit 403. The sleeve 401 is made of insulating and flexible materials such as silicone rubber or TPU, and is completely wrapped around the outer periphery of the liquid supply pipeline 30. It also bridges and covers the outer wall of the pipe connector 301 and part of the outer pipe 302. The axial length of the outer pipe 302 extending into the sleeve 401 is not less than 5 mm.

[0160] A ring-shaped mounting groove 6 is formed on the inner circumferential wall of the sleeve 401. The detection element 402 and the pad 7 are alternately embedded in the mounting groove 6 along the circumferential direction, and their ends along the axial direction of the sleeve 401 are flush with each other. The detection element 402 can be fixed in the mounting groove 6 by interference fit or waterproof insulating adhesive, and the assembly gap is fully filled.

[0161] The detection element 402 is made of corrosion-resistant and conductive materials such as 316 stainless steel or titanium alloy. The circumferential dimension W of a single detection element 402 along the circumferential direction of the sleeve 401 is 10mm to 20mm, and the circumferential gap L between the inner end faces 4022 of two adjacent detection elements 402 is 1mm to 3mm. Structurally, the detection element 402 protrudes radially inward relative to the inner circumferential wall of the sleeve 401, and the pad 7 also protrudes radially inward. The detection element 402 further protrudes inward relative to the arc-shaped wall surface 701 of the pad 7, with a protrusion thickness t of 0.1mm to 0.3mm. The side of the pad 7 facing the pipeline is a concave arc-shaped wall surface 701, and the two sides of the arc-shaped wall surface 701 are in close contact with the two adjacent detection elements 402 along the circumferential direction.

[0162] The inner peripheral wall of the sleeve 401 is also provided with a sealing structure extending in a full circle. The sealing structure includes a first annular protrusion 4012 and a second annular protrusion arranged at intervals along the axial direction. The first annular protrusion 4012 is positioned corresponding to the position of the pipe connector 301 and abuts against the outer peripheral wall of the pipe connector 301. The first annular protrusion 4012 protrudes radially towards the inside of the sleeve 401 relative to the detection element 402. The inner peripheral wall of the sleeve 401, the first annular protrusion 4012, and the outer wall of the pipe connector 301 together form an annular cavity 8, in which part of the detection element 402 is housed. The second annular protrusion is positioned corresponding to the position of the outer tube 302 and abuts against the outer peripheral wall of the outer tube 302. The outer tube 302 and the detection element 402 are spaced apart along the axial direction, with an axial gap of 0.1 mm to 0.3 mm, to prevent the metal outer tube 302 from touching the detection element 402 and causing a short circuit.

[0163] Each detection element 402 is connected to an independent connecting lead 4021. The connecting lead 4021 passes through the wire hole 4011 in the wall of the sleeve 401 and is finally connected to the detection circuit 403. The detection circuit 403 includes a power supply component 4031, a signal processing component 4032 and an alarm unit. Any two adjacent detection elements 402 and the power supply component 4031 together form an independent detection loop. The sampling signals of each detection loop do not interfere with each other.

[0164] The working process of this embodiment is as follows: Under normal conditions, adjacent detection elements 402 are insulated by air, and each detection circuit is in an open circuit state, so the alarm unit does not operate; when the liquid supply pipeline 30 leaks, the heat exchange medium seeps out from the pipe wall and flows into the annular cavity 8 between the sleeve 401 and the pipeline joint 301. The liquid diffuses and fills the space between two adjacent detection elements 402, so that the two originally insulated detection elements 402 form a conductive path through the conductive heat exchange medium. The circuit generates a continuous electrical signal and transmits it to the signal processing component 4032. Then, the signal processing component 4032 drives the alarm unit to issue an audible and visual alarm.

[0165] refer to Figure 1 In some embodiments, this application also provides an energy storage system, which may include one or more of the above-described energy storage devices 1 and a power conversion system 2 (PCS). The power conversion system 2 is used to connect the power generation equipment 3 or the power grid or load and the energy storage device 1.

[0166] The power generation device 3 is used to generate electrical energy, the energy storage device 1 is used to store electrical energy, and the energy conversion system 2 is used to convert the current input to the energy storage device 1 or the current output from the energy storage device 1 into energy. The electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the energy conversion system 2, and the electrical energy stored in the energy storage device 1 can also be output to the load or the power grid through the energy conversion system 2. As an example, the power generation device 3 can specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0167] refer to Figure 3 In some embodiments, this application also provides a charging network, including a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides electrical energy to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical equipment (such as a vehicle) to replenish the power of the electrical equipment.

[0168] The energy storage device 1 can be located inside the charging pile 4 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. 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 they should all be covered within the scope of the claims and specification 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. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: Box; A battery cluster, wherein the battery cluster is disposed within the housing; A liquid supply pipeline is located inside the housing and is used to supply heat exchange medium to the battery cluster. A leakage detection assembly includes a sleeve, at least two detection elements, and a detection circuit electrically connected to each of the detection elements. The sleeve surrounds the outer peripheral wall of the liquid supply pipeline. Each detection element is disposed inside the sleeve and is arranged circumferentially at intervals along the inner peripheral wall of the sleeve. Any two adjacent detection elements can be connected through the leaked heat exchange medium. The detection circuit outputs a leakage signal after detecting the conduction current.

2. The energy storage device according to claim 1, characterized in that, The detection element protrudes radially toward the interior of the sleeve relative to the inner peripheral wall of the sleeve.

3. The energy storage device according to claim 2, characterized in that, The inner circumferential wall of the sleeve is provided with an annular mounting groove, and the detection element is embedded in the mounting groove.

4. The energy storage device according to claim 3, characterized in that, The detection element is interference-fitted into the mounting groove.

5. The energy storage device according to claim 3, characterized in that, The detection element is bonded to the wall of the mounting groove.

6. The energy storage device according to any one of claims 3 to 5, characterized in that, The leakage detection assembly also includes an insulating pad disposed between two adjacent detection elements.

7. The energy storage device according to claim 6, characterized in that, The pad has an arc-shaped wall surface that faces the interior of the sleeve in the radial direction, and the arc-shaped wall surface contacts two adjacent detection elements on opposite sides of the sleeve in the circumferential direction.

8. The energy storage device according to claim 7, characterized in that, The pad protrudes radially toward the interior of the sleeve relative to the inner peripheral wall of the sleeve, and the detection element protrudes radially toward the interior of the sleeve relative to the arc-shaped wall surface.

9. The energy storage device according to claim 6, characterized in that, The pad is embedded in the mounting groove, and the two opposite ends of the pad along the axial direction of the sleeve are respectively flush with the corresponding ends of the detection element.

10. The energy storage device according to claim 1, characterized in that, The material of the detection element is corrosion resistant.

11. The energy storage device according to claim 1, characterized in that, The detection element has an inner end face facing the liquid supply pipeline, and the circumferential distance between any two adjacent inner end faces of the detection element is between 1 mm and 3 mm along the circumferential direction of the sleeve.

12. The energy storage device according to claim 1, characterized in that, The dimensions of each of the detection elements in the circumferential direction of the sleeve are between 10 and 20 mm.

13. The energy storage device according to claim 1, characterized in that, The detection circuit has a power supply component, and any two adjacent detection elements are electrically connected to the power supply component to form a detection loop.

14. The energy storage device according to claim 13, characterized in that, The detection circuit further includes a signal processing component and an alarm unit; any two adjacent detection elements are connected through the leaked heat exchange medium to input a leakage signal to the signal processing component, which is used to receive the leakage signal and drive the alarm unit to work.

15. The energy storage device according to claim 1, characterized in that, The detection element has a connecting lead, and the housing is provided with a through hole for accommodating the connecting lead.

16. The energy storage device according to claim 1, characterized in that, The sleeve is flexible.

17. The energy storage device according to claim 1, characterized in that, The liquid supply pipeline includes a pipeline joint and an outer pipe for conveying the heat exchange medium. The pipeline joint is connected to the outer pipe. The sleeve at least partially covers the outer peripheral wall of the pipeline joint and at least partially covers the outer peripheral wall of the outer pipe.

18. The energy storage device according to claim 17, characterized in that, The outer tube is spaced apart from each of the detection elements along the axial direction of the sleeve, forming a gap.

19. The energy storage device according to claim 18, characterized in that, The gap is d1, where 0.1mm ≤ d1 ≤ 0.3mm.

20. The energy storage device according to claim 17, characterized in that, The axial length of the outer tube inserted into the sleeve is not less than 5 mm.

21. The energy storage device according to claim 17, characterized in that, The inner peripheral wall of the sleeve is provided with a sealing structure that abuts against the outer peripheral wall of the liquid supply pipeline.

22. The energy storage device according to claim 21, characterized in that, The pipe connector is inserted into the outer pipe, and the sealing structure includes a first annular protrusion abutting against the outer peripheral wall of the pipe connector; an annular cavity is formed between the inner peripheral wall of the sleeve and the outer peripheral wall of the pipe connector, and the detection element is at least partially located in the annular cavity.

23. The energy storage device according to claim 22, characterized in that, The first annular protrusion protrudes towards the interior of the sleeve along the radial direction of the sleeve relative to the detection element.

24. The energy storage device according to claim 21, characterized in that, The sealing structure also includes a second annular protrusion that abuts against the outer peripheral wall of the outer tube.

25. 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 24, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

26. 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 24 or an energy storage system as described in claim 25, wherein the energy storage device is used to provide electrical energy to the charging pile.

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