Energy storage system and pipeline sealing connection device

Abstract

The utility model discloses an energy storage system and a pipeline sealing connection device, and belongs to the technical field of energy storage. The energy storage system comprises a battery pack and a liquid cooling module, the liquid cooling module comprises a liquid cooling pipeline, and the liquid cooling pipeline comprises sub-pipelines which are connected through a pipeline sealing connection device. The pipeline sealing connection device comprises a hoop, a sealing gasket and two bushings, the hoop can be arranged in an opening and closing mode, the sealing gasket comprises a flexible outer ring part and a rigid inner ring part fixedly connected to the inner side of the flexible outer ring part, and the thickness of the rigid inner ring part is smaller than that of the flexible outer ring part; annular flanges are arranged on the outer side of one port of the lining, the rigid inner ring part and at least part of the flexible outer ring part are clamped between the two annular flanges, and the hoop surrounds the outer sides of the two annular flanges and is used for hooping the two annular flanges. The pipeline sealing connection device effectively solves the problems of overcompression of the sealing gasket, torque attenuation and poor environmental adaptability, prevents sealing failure of the liquid cooling pipeline, and improves the working reliability of an energy storage system.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to energy storage systems and pipeline sealing connection devices. Background Technology

[0002] The energy storage system utilizes liquid-cooled modules to dissipate heat from the battery pack. These modules include a liquid-cooling unit, a cold plate, and liquid-cooled piping connecting the two. The cold plate exchanges heat with the battery pack, and the cooled liquid medium is then transported to the liquid-cooling unit via the liquid-cooled piping for further cooling. Some sections of the liquid-cooled piping (e.g., metal segments) are typically arranged in segments, with multiple sub-pipes sealed together using a piping sealing connection device.

[0003] In related technologies, the pipeline sealing connection device includes: a clamp, a sealing ring, and two bushings. The two bushings are arranged opposite each other and the sealing ring is sandwiched between the two bushings. The pipe ends of the two pipelines to be connected extend into the corresponding bushings, and the clamp surrounds the two bushings and tightens them, thereby achieving a sealed connection between the two pipelines.

[0004] Since the sealing ring is usually made of rubber, it is easy for it to overflow between the two bushings during the clamping process. It is also easy for the life of the sealing ring to be reduced due to over-compression. All of the above can easily lead to the failure of the liquid cooling pipeline seal, affecting the reliable operation of the energy storage system. Utility Model Content

[0005] This utility model provides an energy storage system and a pipeline sealing connection device, which can solve the technical problem in related technologies where the pipeline sealing connection device has a high risk of leakage and is prone to seal failure, resulting in poor operational reliability of the energy storage system. Specifically, the technical solution is as follows.

[0006] On one hand, an energy storage system is provided, the energy storage system comprising: a battery pack and a liquid cooling module, the liquid cooling module being used at least for heat exchange of the battery pack, the liquid cooling module comprising liquid cooling pipelines, the liquid cooling pipelines comprising a pipeline sealing connection device and sub-pipelines connected through the pipeline sealing connection device.

[0007] The pipeline sealing connection device includes: a clamp, a sealing gasket, and two bushings. The clamp is closable. The sealing gasket includes a flexible outer ring and a rigid inner ring fixedly connected to the inner side of the flexible outer ring. The thickness of the rigid inner ring is less than the thickness of the flexible outer ring, wherein the thickness direction is along the axial direction of the sealing gasket. Each bushing is used to accommodate the end of one of the sub-pipelines. One end of the bushing has an annular flange that protrudes radially outward along the bushing. The rigid inner ring and at least a portion of the flexible outer ring are sandwiched between the annular flanges of the two bushings. The clamp is wrapped around the outside of the two annular flanges to tighten them.

[0008] The energy storage system provided in this embodiment of the invention employs an improved pipeline sealing connection device. Its sealing gasket includes a flexible outer ring and a rigid inner ring bonded to the inner side of the flexible outer ring. Thus, the sealing gasket is a combined rigid-flexible gasket. Furthermore, by making the thickness of the rigid inner ring less than the thickness of the flexible outer ring, the flexible outer ring is controlled to be at a suitable compression ratio. This arrangement can solve the sealing failure and overflow caused by over-compression of the sealing gasket. This is because when the clamp tightens the two annular flanges, the rigid inner ring of the sealing gasket acts as a compression limiting structure, forming a support interface with the annular flanges, providing a mechanical stop and limiting the maximum compression of the sealing gasket. This prevents the flexible outer ring from being over-compressed and avoids irreversible deformation due to over-compression. Under suitable compression, the flexible outer ring of the sealing gasket fills the gap between the two annular flanges through elastic deformation, achieving interface sealing. As can be seen, the pipeline sealing connection device provided by this utility model restricts excessive deformation of the sealing gasket through a rigid inner ring with a smaller thickness, and achieves reliable sealing through a flexible outer ring with a larger thickness. This not only ensures a reliable sealing effect for the sealing gasket, but also effectively solves the problems of excessive compression ratio during use, as well as aging without rebound and reduced lifespan caused by high compressive stress. When the pipeline sealing connection device is applied to the liquid-cooled pipeline of an energy storage system, it is more beneficial for improving the connection reliability of the liquid-cooled pipeline, effectively preventing sealing failure of the liquid-cooled pipeline, and improving the operational reliability of the energy storage system.

[0009] In some possible implementations, the flexible outer ring is made of EPDM rubber, and the rigid inner ring is made of metal. The EPDM flexible outer ring not only possesses high elasticity and flexibility, but also excellent aging resistance, chemical corrosion resistance, water resistance, and good insulation properties. Furthermore, it is environmentally friendly and non-toxic, allowing the pipe sealing connection device provided in this embodiment to be used as a sanitary clamp component in liquid-cooled pipelines. The rigid inner ring, made of metal, has suitable hardness, thereby providing stable support and limiting.

[0010] In some possible implementations, the inner side of the flexible outer ring has a groove, and the outer side of the rigid inner ring has a boss, which is received and fixedly connected to the inside of the groove. This approach helps to enhance the connection stability and reliability between the flexible outer ring and the rigid inner ring.

[0011] In some possible implementations, the flexible outer ring portion includes a first ring segment and a second ring segment distributed outward in a radial direction; the thickness of the first ring segment is greater than the thickness of the second ring segment and is provided with the groove; the thickness of the second ring segment is greater than the thickness of the rigid inner ring portion; the first ring segment and the second ring segment are both sandwiched between the two annular flanges.

[0012] By making the first ring segment thicker, reliable sealing is still possible even when grooves are provided on it. By making the second ring segment thicker than the rigid inner ring, the flexible outer ring is ensured to maintain the desired and reasonable compression ratio and reliable sealing after being compressed.

[0013] In some possible implementations, the inner walls of the two annular flanges have limiting grooves, and the first annular segment is at least partially accommodated within the limiting grooves. The limiting grooves can limit the first annular segment of the flexible outer ring in both radial and axial directions, further improving the assembly stability between the annular flanges of the gasket and the bushing, and preventing undesirable displacement of the gasket.

[0014] In some possible implementations, the flexible outer ring portion further includes a third ring segment, wherein the first ring segment, the second ring segment, and the third ring segment are distributed outward in a radial direction in sequence; the third ring segment is located outside the annular flange and abuts against the outer wall of at least one of the two annular flanges.

[0015] By further incorporating a third ring segment, the gasket is radially confined, improving the assembly stability of the gasket and the bushing's annular flange. Furthermore, the third ring segment's bent arrangement relative to the second ring segment allows for a bent sealing path, further enhancing the sealing performance of the flexible outer ring.

[0016] In some possible implementations, the clamp includes a first arc-shaped clamp body and a second arc-shaped clamp body. The inner sidewalls of the first and second arc-shaped clamp bodies are provided with arc-shaped positioning grooves along the circumferential direction, which are used to accommodate the annular flange. The first and second arc-shaped clamp bodies each have a first end and a second end distributed along the circumferential direction. The first ends of the first and second arc-shaped clamp bodies are hinged together, and the second ends of the first and second arc-shaped clamp bodies are each provided with a connecting portion. The two connecting portions are detachably connected by fasteners.

[0017] In some possible implementations, the fastener includes a screw and a nut, the screw passing through the two connecting portions and threadedly connected to the nut;

[0018] The fastener satisfies at least one of the following conditions:

[0019] Condition 1: The inner threaded surface of the nut has an anti-slip coating;

[0020] Condition 2, the fastener further includes a washer, which is sleeved on the outside of the screw and sandwiched between the nut and the corresponding connecting part;

[0021] Condition 3: One of the two connecting parts is connected to one end of the screw, and the other has a screw hole that is closed in the circumferential direction.

[0022] The above solution can effectively avoid torque decay of threaded fastening torque, thereby reducing the risk of pipeline leakage and maintenance frequency. In addition, it can also prevent nuts from loosening due to vibration during transportation.

[0023] On the other hand, a pipe sealing connection device is provided, comprising: a clamp, a sealing gasket, and two bushings. The clamp is closable. The sealing gasket includes a flexible outer ring portion and a rigid inner ring portion fixedly connected to the inner side of the flexible outer ring portion. The thickness of the rigid inner ring portion is less than the thickness of the flexible outer ring portion, wherein the thickness direction is along the axial direction of the sealing gasket. Each bushing is used to accommodate the end of a sub-pipeline. One end of the bushing has an annular flange that protrudes radially outward along the bushing. The rigid inner ring portion and at least a portion of the flexible outer ring portion are sandwiched between the annular flanges of the two bushings. The clamp is wrapped around the outside of the two annular flanges for tightening the two annular flanges.

[0024] The pipeline sealing connection device provided in this embodiment of the utility model includes a sealing gasket comprising a flexible outer ring portion and a rigid inner ring portion bonded to the inner side of the flexible outer ring portion. Thus, the sealing gasket is a combined rigid-flexible gasket. Furthermore, by making the thickness of the rigid inner ring portion less than the thickness of the flexible outer ring portion, the flexible outer ring portion is controlled to be at a suitable compression ratio. This arrangement can solve the sealing failure and overflow caused by over-compression of the sealing gasket. This is because when the clamp tightens the two annular flanges, the rigid inner ring portion of the sealing gasket can act as a compression limiting structure, forming a support interface with the annular flanges, providing a mechanical stop and limiting the maximum compression of the sealing gasket. This prevents the flexible outer ring portion from being over-compressed and avoids irreversible deformation caused by over-compression. Under suitable compression, the flexible outer ring portion of the sealing gasket fills the gap between the two annular flanges through elastic deformation, achieving interface sealing. As can be seen, the pipeline sealing connection device provided by this utility model restricts excessive deformation of the sealing gasket through a rigid inner ring with a smaller thickness, and achieves reliable sealing through a flexible outer ring with a larger thickness. This not only ensures a reliable sealing effect for the sealing gasket, but also effectively solves the problems of excessive compression ratio during use, as well as aging without rebound and reduced lifespan caused by high compressive stress. When the pipeline sealing connection device is applied to the liquid-cooled pipeline of an energy storage system, it is more beneficial for improving the connection reliability of the liquid-cooled pipeline, effectively preventing sealing failure of the liquid-cooled pipeline, and improving the operational reliability of the energy storage system.

[0025] In some possible implementations, the clamp includes a first arc-shaped clamp body and a second arc-shaped clamp body. The inner sidewalls of the first and second arc-shaped clamp bodies are provided with arc-shaped positioning grooves along the circumferential direction, which are used to accommodate the annular flange. The first and second arc-shaped clamp bodies each have a first end and a second end distributed along the circumferential direction. The first ends of the first and second arc-shaped clamp bodies are hinged together, and the second ends of the first and second arc-shaped clamp bodies are each provided with a connecting portion. The two connecting portions are detachably connected by fasteners.

[0026] The fastener includes a screw and a nut, the screw passing through the two connecting parts and being threadedly connected to the nut;

[0027] The fastener satisfies at least one of the following conditions:

[0028] Condition 1: The inner threaded surface of the nut has an anti-slip coating;

[0029] Condition 2, the fastener further includes a washer, which is sleeved on the outside of the screw and sandwiched between the nut and the corresponding connecting part;

[0030] Condition 3: One of the two connecting parts is connected to one end of the screw, and the other has a screw hole that is closed in the circumferential direction.

[0031] The above solution can effectively avoid torque decay of threaded fastening torque, thereby reducing the risk of pipeline leakage and maintenance frequency. In addition, it can also prevent nuts from loosening due to vibration during transportation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a pipeline sealing connection device in related technologies;

[0033] Figure 2 A schematic diagram of an exemplary energy storage system provided for an embodiment of this utility model;

[0034] Figure 3 A schematic diagram of the arrangement of liquid cooling pipelines in an energy storage system in an exemplary liquid cooling module provided for an embodiment of this utility model;

[0035] Figure 4 A schematic diagram of the structure of an exemplary pipeline connection device provided in an embodiment of the present utility model from one perspective;

[0036] Figure 5 for Figure 4 Exploded view of the pipeline connection device shown;

[0037] Figure 6 A front view of an exemplary pipe connection device provided for an embodiment of this utility model;

[0038] Figure 7 for Figure 6 A cross-sectional view of the pipe connection device shown in Figure AA;

[0039] Figure 8 for Figure 6 BB cross-sectional view of the pipeline connection device shown;

[0040] Figure 9 A cross-sectional view of an exemplary sealing gasket provided for an embodiment of the present utility model;

[0041] Figure 10 for Figure 9 The exploded view of the sealing gasket in cross-section shown;

[0042] Figure 11 A schematic diagram illustrating the application state of an exemplary pipeline connection device provided in this embodiment of the utility model;

[0043] Figure 12 A schematic diagram of the structure of an exemplary pipeline connection device provided for an embodiment of the present utility model from another perspective;

[0044] Figure 13 for Figure 12 A cross-sectional view of the pipe connection device shown in Figure AA;

[0045] Figure 14 A schematic diagram of an exemplary clamp provided in an embodiment of this utility model;

[0046] Figure 15 Schematic diagrams of two different types of clamps provided for embodiments of this utility model.

[0047] The reference numerals in the attached figures represent:

[0048] 001. Battery pack;

[0049] 002. Liquid cooling module;

[0050] 0021, Liquid cooling piping; 00211, Pipeline sealing connection device; 00212, Sub-piping;

[0051] 0022, Cold-rolled steel plate; 0023, Liquid cooling unit;

[0052] 100. Clamps;

[0053] 11. First arc-shaped hoop; 12. Second arc-shaped hoop;

[0054] 101. Connecting part; 1011. Screw hole; 102. Hinge part; 103. Arc-shaped placement groove;

[0055] 13. Fasteners; 131. Screws; 132. Nuts; 133. Washers;

[0056] 14. Pin;

[0057] 200. Sealing gasket;

[0058] 200a, Annular gasket; 200b, Arc-shaped gasket;

[0059] 201. Flexible outer ring; 2010. Groove; 2011. First ring segment; 2012. Second ring segment; 2013. Third ring segment;

[0060] 202. Rigid inner ring; 2020. Boss; 2021. Inner ring body;

[0061] 300, bushing; 301, annular flange; 302, limiting groove. Detailed Implementation

[0062] The technical solutions of the present utility model will be further described below with reference to the accompanying drawings of the embodiments of the present utility model. When the following description involves the accompanying drawings, it should be understood that the terms "inner", "outer", "axial", "circumferential", "thickness", 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 the present 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 the embodiments of the present utility model.

[0063] The energy storage system utilizes liquid-cooled modules to dissipate heat from the battery pack. These modules include a liquid-cooling unit, a cold plate, and liquid-cooled piping connecting the two. The cold plate exchanges heat with the battery pack, and the cooled liquid medium is then transported to the liquid-cooling unit via the liquid-cooled piping for further cooling. Some sections of the liquid-cooled piping (e.g., metal segments) are typically arranged in segments, with multiple sub-pipes sealed together using a piping sealing connection device. Figure 1 An example of a pipe sealing connection device in related technology is provided, comprising a clamp A, a sealing ring B, and two bushings C-1 and C-2. The two bushings C-1 and C-2 are arranged opposite each other along their axial direction, with the sealing ring B sandwiched between them. The pipe ends of the two pipes D-1 and D-2 to be connected extend into their respective bushings. The clamp A encircles and tightens the two bushings C-1 and C-2, thereby achieving a sealed connection between the two pipes D-1 and D-2. For example, the clamp A is contracted by tightening a nut. During the contraction process, the clamp A compresses and tightens the two bushings C-1 and C-2 and the sealing ring B, ultimately achieving a seal at the connection and interface of the two pipes D-1 and D-2. Since the sealing ring B is usually made of rubber, it is prone to overflowing between the two bushings C-1 and C-2 during the tightening process of the clamp A, leading to seal failure and reduced lifespan due to over-compression. All of the above can easily lead to the failure of the liquid cooling pipeline seal, affecting the reliable operation of the energy storage system.

[0064] In view of the technical problems existing in the related technologies, the present invention provides an energy storage system using an improved pipeline sealing connection device.

[0065] Figure 2 A combination diagram of a pipeline sealing connection device provided for an embodiment of this utility model is attached. Figure 2 As shown, the energy storage system includes: a battery pack 001 and a liquid cooling module 002. Figure 2 The liquid cooling module 002 is built into the housing of the energy storage system, so it is indicated by a dashed box. The liquid cooling module 002 is used at least for heat exchange of the battery pack 001, and it is not excluded that the liquid cooling module 002 is also used for heat dissipation of electrical modules (not shown in the figure) in the energy storage system.

[0066] Figure 3 An example of a schematic layout of a liquid-cooled module 002 in an energy storage system is shown, particularly the layout of its liquid-cooled piping 0021, as illustrated in the attached diagram. Figure 3 As shown, the liquid cooling module 002 includes a liquid cooling pipe 0021, a cold plate 0022, and a liquid cooling unit 0023. The cold plate 0022 is disposed on one side of the battery pack 001 (for example, at the bottom of the battery pack 001). The cold plate 0022 is connected to the liquid cooling unit 0023 through the liquid cooling pipe 0021. Thus, the liquid cooling medium circulates between the cold plate 0022 and the liquid cooling unit 0023 through the liquid cooling pipe 0021 to effectively remove the heat generated by the battery pack 001.

[0067] Figure 3 The liquid cooling pipeline 0021 is also shown, including a pipeline sealing connection device 00211 and a sub-pipeline 00212 connected via the pipeline sealing connection device 00211. The following will be combined with... Figure 2 and Figure 3 The arrangement of the liquid cooling pipeline 0021 equipped with the pipeline sealing connection device 00211 is illustrated by way of example. (See attached diagram) Figure 2 and attached Figure 3 As shown, multiple battery packs 001 are arranged in rows along the height of the energy storage cabinet (this row of battery packs 001 can also be called a battery cluster), and multiple rows of battery packs 001 are arranged in rows along the length of the energy storage cabinet. For each row of battery packs 001, each battery pack 001 is provided with a corresponding cold plate 0022, which has a liquid cooling medium inlet and a liquid cooling medium outlet.

[0068] The liquid cooling pipeline 0021 includes a primary pipeline I, a secondary pipeline II, and a tertiary pipeline III. The liquid cooling pipeline 0021 is connected to the liquid cooling medium inlet and outlet of the cold plate 0022 via a set of tertiary pipelines III. That is, each cold plate 0022 corresponds to a set of tertiary pipelines III (one as the inlet pipeline and one as the outlet pipeline). Multiple cold plates 0022 in the same column correspond to multiple sets of tertiary pipelines III, and these multiple sets of tertiary pipelines III are connected to a set of secondary pipelines II (one as the inlet pipeline and one as the outlet pipeline). For example… Figure 3 An example is shown where a set of secondary pipelines II are arranged on one side of the battery pack 001 in the corresponding column, distributed along the length of the energy storage system. It can be seen that for multiple rows of battery packs 001, multiple sets of secondary pipelines II are correspondingly arranged, and these multiple sets of secondary pipelines II are connected to a set of primary pipelines I (primary pipeline I as the inlet and primary pipeline I as the outlet), for example, Figure 3The example illustrates that this group of primary piping I is located on one side (e.g., the bottom side) of a multi-row battery pack 001 distributed along the width direction of the energy storage system. Furthermore, this group of primary piping I is connected to the inlet and outlet of the liquid cooling unit 0023.

[0069] In application, after the cold plate 0022 exchanges heat with the corresponding battery pack 001, the heat medium in the cold plate 0022 enters the liquid cooling unit 0023 for cooling treatment via the tertiary pipe III (as the outlet pipe), the secondary pipe II (as the outlet pipe), and the primary pipe I (as the outlet pipe). The resulting cold medium circulates back to the cold plate 0022 via the primary pipe I (as the inlet pipe), the secondary pipe II (as the inlet pipe), and the tertiary pipe III (as the inlet pipe) for the next round of heat exchange treatment.

[0070] In liquid cooling piping 0021, the tertiary piping III typically uses flexible hoses and is relatively short, while the primary piping I and secondary piping II of liquid cooling piping 0021 typically use longer rigid piping, such as metal piping. Considering the convenience of installation and maintenance, these rigid piping are usually arranged in sections, and multiple pipe sections are connected by piping sealing connection devices.

[0071] In some examples, at least one of the primary pipe I and secondary pipe II of the liquid cooling pipe 0021 may be configured to include a pipe sealing connection device 00211 and a sub-pipe 00212 connected through the pipe sealing connection device 00211, for example, Figure 3 An example is given of a primary pipeline I of liquid cooling pipeline 0021, which includes a pipeline sealing connection device 00211 and a sub-pipeline 00212 connected through the pipeline sealing connection device 00211.

[0072] The following combination Figures 4-9 The structural layout of the pipeline sealing connection device 00211 is illustrated by way of example. Figure 4 This is a combination diagram of a pipeline sealing connection device 00211 provided in an embodiment of the present utility model. Figure 5 for Figure 4 The exploded view of the pipeline sealing connection device 00211 shown. Figure 6 This is a schematic diagram of the structure of the pipeline sealing connection device 00211 from another perspective. Figure 7 for Figure 6 The AA section view of the pipeline sealing connection device 00211 shown. Figure 8 for Figure 6 The BB section view of the pipeline sealing connection device 00211 shown.

[0073] As attached Figure 4 -Appendix Figure 8As shown, the pipeline sealing connection device 00211 includes: a clamp 100, a sealing gasket 200, and two bushings 300, wherein the two bushings 300 are arranged opposite each other along their axial direction, for example, Figure 7 The example shows one port of one bushing 300a being connected to one port of another bushing 300b.

[0074] The clamp 100 is closable, meaning that the clamp 100 has an open state to allow it to be fitted to the outside of the bushing 300, and the clamp 100 also has a closed state to tighten the bushing 300.

[0075] The sealing gasket 200 includes a flexible outer ring portion 201 and a rigid inner ring portion 202 fixedly connected to the inner side of the flexible outer ring portion 201. The thickness of the rigid inner ring portion 202 is less than the thickness of the flexible outer ring portion 201, wherein the thickness direction is along the axial direction of the sealing gasket 200. Figure 9 A cross-sectional view of the sealing gasket 200 is shown in the attached figure. Figure 9 As shown, it illustrates that the thickness of any portion of the flexible outer ring 201 is greater than the thickness of any portion of the rigid inner ring 202. In particular, it illustrates that the thicknesses T2 and T3 at different locations of the flexible outer ring 201 are both greater than the maximum thickness T1 of the rigid inner ring 202.

[0076] Each of the two bushings 300 is used to accommodate the end of a sub-pipe 00212, in combination Figure 5 As shown, one end of the bushing 300 has an annular flange 301, which protrudes outward along the radial direction of the bushing 300. (Continue to see...) Figure 7 and Figure 8 A rigid inner ring portion 202 and at least a portion of a flexible outer ring portion 201 are sandwiched between the annular flanges 301 of the two bushings 300. A clamp 100 surrounds the outside of the two annular flanges 301 to tighten them. In application, the flexible outer ring portion 201 forms a sealing interface with the annular flanges 301, and the rigid inner ring portion 202 forms a supporting interface with the annular flanges 301.

[0077] Figure 11 The example illustrates the application state of the pipe connection device 00211 when connecting two sub-pipes 00212 to be connected. This can be considered as... Figure 3 A magnified view of a portion of region a, combined with Figure 11 The working principle of the pipeline sealing connection device provided in this embodiment of the present invention will be described by way of example:

[0078] As attached Figure 11As shown, two bushings 300a and 300b are respectively fitted onto the interfaces of the two sub-pipes 00212a and 00212b to be connected, so that the ports of the two bushings 300a and 300b are aligned and the sealing gasket 200 is clamped between them. The clamp 100, in its open state, is assembled to the outside of the annular flange 301 of the bushing 300. Subsequently, the clamp 100 is switched from the open state to the closed state. During this process, the clamp 100 contracts and tightens the annular flange 301 of the two bushings 300. At the same time, the sealing gasket 200 is pressed by the two annular flanges 301. Specifically, the flexible outer ring 201 of the sealing gasket 200 is compressed by the two annular flanges 301, achieving interface sealing. Finally, the sealing connection of the two sub-pipes 00212a and 00212b is achieved based on this pipeline sealing connection device.

[0079] As can be seen, the energy storage system provided in this embodiment of the present invention uses an improved pipeline sealing connection device 00211, whose sealing gasket 200 includes a flexible outer ring portion 201 and a rigid inner ring portion 202 coupled to the inner side of the flexible outer ring portion 201. Therefore, the sealing gasket 200 is a combined rigid-flexible gasket, and by making the thickness of the rigid inner ring portion 202 less than the thickness of the flexible outer ring portion 201, the flexible outer ring portion 201 is controlled to be at a suitable compression ratio. This arrangement can solve the sealing failure and overflow caused by over-compression of the sealing gasket 200. This is because when the clamp 100 tightens the two annular flanges 301, see... Figure 7 and Figure 8 The rigid inner ring 202 of the sealing gasket 200 serves as a compression limiting structure, forming a support interface with the annular flange 301. It provides a mechanical stop, limiting the maximum compression of the sealing gasket 200 and preventing excessive compression of the flexible outer ring 201, thus avoiding irreversible deformation due to over-compression. Under suitable compression, the flexible outer ring 201 of the sealing gasket 200 fills the gap between the two annular flanges 301 through elastic deformation, achieving interface sealing. Therefore, the pipeline sealing connection device 00211 provided in this embodiment of the present invention, by limiting excessive deformation of the sealing gasket 200 through the thinner rigid inner ring 202 and achieving reliable sealing through the thicker flexible outer ring 201, not only ensures a reliable sealing effect for the sealing gasket 200 but also effectively solves the problems of excessive compression ratio during use, as well as aging without rebound and reduced lifespan caused by high compressive stress. When the pipeline sealing connection device 00211 is applied to the liquid cooling pipeline 0021 of the energy storage system, it is more beneficial to improve the connection reliability of the liquid cooling pipeline 0021, effectively prevent the sealing failure of the liquid cooling pipeline 0021, and improve the operational reliability of the energy storage system.

[0080] It should be noted that the pipeline sealing connection device 00211 provided in this utility model embodiment can not only be used in energy storage systems (such as liquid cooling pipelines of new energy vehicles and commercial storage containers), but is also suitable for reliable connections between various other types of pipelines, especially those pipeline connection scenarios that require high reliability.

[0081] In some examples, the pipe sealing connection device 0021 provided in this embodiment of the present invention is a sanitary clamp component. That is to say, the materials of each component of the pipe sealing connection device 00211 need to meet environmental protection requirements so that it can be used for pipe connections in scenarios with high sanitary requirements, such as the connection of liquid cooling pipes.

[0082] It should be noted that by making the thickness of the rigid inner ring 202 smaller than the thickness of the flexible outer ring 201—that is, based on the thinner rigid inner ring 202 and the thicker flexible outer ring 201—the flexible outer ring 201 can maintain a desired and reasonable compression ratio after being compressed, and maintain reliable sealing. When the compression force is too large, the thinner rigid inner ring 202 ensures that the flexible outer ring 201 is reasonably compressed without overflowing, thereby ensuring reliable contact between the flexible outer ring 201 and the annular flange 301 and avoiding seal failure. When the compression force is small, the greater thickness of the flexible outer ring 201 still ensures reliable contact between it and the annular flange 301, avoiding seal failure. It is evident that by making the thickness of the rigid inner ring 202 smaller than the thickness of the flexible outer ring 201, not only is the sealing failure caused by the small contact area between the flexible outer ring 201 and the annular flange 301 when the compression ratio is too low, but also problems such as the extrusion of the flexible outer ring 201, loss of resilience and lifespan caused by the compression ratio being too high are avoided.

[0083] Based on the fact that the flexible outer ring 201 and the rigid inner ring 202 meet the above-mentioned thickness requirements, the actual thickness of the flexible outer ring 201 and the rigid inner ring 202 can be determined according to the actual needs of the scenario. For example, the ratio of the thickness of the flexible outer ring 201 to the thickness of the rigid inner ring 202 may include, but is not limited to, 2-5:1.

[0084] The dimensions of the flexible outer ring 201 and the rigid inner ring 202 along the radial direction of the clamp 100 are defined as widths. The width of the portion of the rigid inner ring 202 exposed outside the flexible outer ring 201 and the width of the flexible outer ring 201 can be designed according to actual needs. For example, the ratio of the width of the portion of the rigid inner ring 202 exposed outside the flexible outer ring 201 to the width of the flexible outer ring 201 can be set to 0.5-1:1.

[0085] The rigid inner ring 202 can be made of rigid materials, such as high-strength metal materials (stainless steel, iron, etc.), while the flexible outer ring 201 can be made of rubber materials, such as vulcanized rubbers like ethylene propylene diene monomer (EPDM).

[0086] In some examples, the flexible outer ring 201 is an ethylene propylene diene monomer (EPDM) outer ring, and the rigid inner ring 202 is a metal inner ring.

[0087] The flexible outer ring 201 made of EPDM material not only possesses high elasticity and flexibility, but also exhibits excellent aging resistance, chemical corrosion resistance, water resistance, and good insulation properties. Furthermore, it is environmentally friendly and non-toxic, enabling the pipe sealing connection device provided in this embodiment to be used as a sanitary clamp component in liquid-cooled pipelines. The rigid inner ring 202 made of metal has suitable hardness, thereby providing stable support and limiting function.

[0088] The fixed connection between the flexible outer ring 201 and the rigid inner ring 202 can be achieved through the following scheme, see [reference]. Figure 9 and Figure 10 The flexible outer ring portion 201 has a groove 2010 on its inner side (the groove 2010 also has elastic characteristics), and the rigid inner ring portion 202 has a boss 2020 on its outer side. The boss 2020 is accommodated and fixedly connected to the inside of the groove 2010. This method helps to enhance the connection stability and reliability between the flexible outer ring portion 201 and the rigid inner ring portion 202.

[0089] In some examples, the connection between the boss 2020 and the groove 2010 can be achieved by vulcanization bonding, which is simple to operate and provides strong connection stability.

[0090] In other examples, the size of the groove 2010 can be slightly smaller than the size of the boss 2020, so that the boss 2020 is inserted into the groove 2010 by a pressing insertion, thereby achieving a stable connection between the flexible outer ring 201 and the rigid inner ring 202.

[0091] See Figure 10The rigid inner ring portion 202 includes an inner ring body 2021 and a boss 2020 distributed sequentially from the inside to the outside in the radial direction. The boss 2020 can be integrally formed in the middle region of the outer side wall of the inner ring body 2021, and the width of the boss 2020 in the axial direction of the sealing gasket 200 is smaller than the width of the inner ring body 2021 in the axial direction. Thus, a stepped surface is formed at the connection between the inner ring body 2021 and the boss 2020. While the boss 2020 is accommodated and fixedly connected to the inside of the groove 2010, the stepped surface of the inner ring body 2021 abuts against the inner side wall of the flexible outer ring portion 201. This is more advantageous for achieving a stable connection between the flexible outer ring portion 201 and the rigid inner ring portion 202.

[0092] Figure 12 A schematic diagram of the pipe sealing connection device is shown from another perspective. Figure 13 for Figure 12 The AA cross-sectional view of the pipe sealing connection device shown is attached. Figure 12 and attached Figure 13 As shown, the flexible outer ring portion 201 includes a first ring segment 2011 and a second ring segment 2012 distributed outward in the radial direction; the thickness of the first ring segment 2011 is greater than the thickness of the second ring segment 2012 and a groove 2010 is provided; the thickness of the second ring segment 2012 is greater than the thickness of the rigid inner ring portion 202; the first ring segment 2011 and the second ring segment 2012 are both sandwiched between two annular flanges 301.

[0093] By making the thickness of the first ring segment 2011 larger, reliable sealing is still possible when the groove 2010 is provided thereon. By making the thickness of the second ring segment 2012 greater than the thickness of the rigid inner ring 202, it is ensured that the flexible outer ring 201 can maintain the desired and reasonable compression ratio after being compressed, and maintain reliable sealing.

[0094] In some examples, the inner walls of the two annular flanges 301 have limiting grooves 302, and the first annular segment 2011 is at least partially accommodated inside the limiting grooves 302. The limiting grooves 302 can limit the first annular segment 2011 of the flexible outer ring 201 from the radial and axial directions. In this way, even if the flexible outer ring 201 is overcompressed, the first annular segment 2011 of the flexible outer ring 201 can be effectively prevented from overflowing based on the above-mentioned limiting effect. Moreover, it is also beneficial to further improve the assembly stability between the annular flanges 301 of the sealing gasket 200 and the bushing 300, and prevent the sealing gasket 200 from undergoing undesirable displacement.

[0095] Furthermore, as shown in the appendix Figure 13As shown, the flexible outer ring portion 201 further includes a third ring segment 2013. The first ring segment 2011, the second ring segment 2012, and the third ring segment 2013 are distributed outward in a radial direction. The third ring segment 2013 is located outside the annular flange 301 and abuts against the outer wall of at least one of the two annular flanges 301. That is, the third ring segment 2013 extends along the axial direction of the sealing gasket 200, and the third ring segment 2013 and the second ring segment 2012 cooperate to form a clearance groove to avoid the annular flange 301.

[0096] By further configuring the third ring segment 2013, the sealing gasket 200 is limited in the radial direction, improving the assembly stability of the sealing gasket 200 and the annular flange 301 of the bushing 300. In addition, the third ring segment 2013 is bent relative to the second ring segment 2012, which allows the sealing path to be bent, further improving the sealing performance of the flexible outer ring 201.

[0097] For any of the aforementioned pipe sealing connection devices, as shown in the attached document... Figure 14 As shown, the clamp 100 includes a first arc-shaped clamp body 11 and a second arc-shaped clamp body 12. Arc-shaped placement grooves 103 are provided along the circumferential direction on the inner sidewalls of the first arc-shaped clamp body 11 and the second arc-shaped clamp body 12 (in conjunction with...). Figure 13 The arc-shaped groove 103 is used to accommodate the annular flange 301. Figure 13 As an example, the annular flanges 301 of the two bushings 300 are accommodated in the arc-shaped grooves 103 of the first arc-shaped hoop 11 and the second arc-shaped hoop 12. When the annular flanges 301 of the two bushings 300 are accommodated in the arc-shaped grooves 103, the two side walls of the arc-shaped grooves 103 arranged opposite to each other in the axial direction of the clamp 100 can stop the annular flanges 301 in the axial direction.

[0098] Along the radial direction of the clamp 100 and from the inside out, the width of the arc-shaped placement groove 103 gradually decreases, where the width refers to the dimension of the arc-shaped placement groove 103 in the axial direction of the clamp 100. Correspondingly, along the radial direction of the bushing 300 and from the inside out, the width of the annular flange 301 of the bushing 300 gradually decreases, where the width refers to the dimension of the annular flange 301 in the axial direction of the bushing 300. Thus, as the clamp 100 contracts, the stopping force between the annular flange 301 and the arc-shaped placement groove 103 increases, which is more conducive to tightening the bushing 300 and compressing the sealing gasket 200.

[0099] The first arc-shaped hoop 11 and the second arc-shaped hoop 12 each have a first end and a second end distributed along the circumferential direction. The first ends of the first arc-shaped hoop 11 and the second arc-shaped hoop 12 are hinged together. The second ends of the first arc-shaped hoop 11 and the second arc-shaped hoop 12 are each provided with a connecting part 101. The two connecting parts 101 are detachably connected by fasteners 13.

[0100] The first arc-shaped hoop 11 and the second arc-shaped hoop 12 cooperate to form an annular cavity to hold the bushing 300. In some examples, the main body of the first arc-shaped hoop 11 and the second arc-shaped hoop 12 are both arc-shaped, such as semi-circular arc, to provide half of the aforementioned annular cavity.

[0101] The first arc-shaped hoop 11 and the second arc-shaped hoop 12 are hinged at their first ends, allowing them to rotate relative to each other, so that the first arc-shaped hoop 11 and the second arc-shaped hoop 12 can open or close, and switch between the open and closed states.

[0102] The first end of both the first arc-shaped hoop 11 and the second arc-shaped hoop 12 is provided with a hinge portion 102, and the hinge portion 102 of one of the first arc-shaped hoop 11 and the second arc-shaped hoop 12 has a groove ( Figure 14 Example: The hinge portion 102 of the first arc-shaped hoop 11 has a groove; the hinge portion 102 of the other is configured as a protrusion to fit into the aforementioned groove. Figure 14 The example illustrates that the hinge portion 102 of the second arc-shaped hoop 12 is protruding, and a rotatable connection between the two hinge portions 102 is achieved by a pin 14, allowing the cavity formed by the first arc-shaped hoop 11 and the second arc-shaped hoop 12 to open or close.

[0103] As attached Figure 14 As shown, the second ends of the first arc-shaped hoop 11 and the second arc-shaped hoop 12 are both provided with connecting portions 101. For example, the connecting portions 101 extend outward along the radial direction of the corresponding arc-shaped hoop. The two connecting portions 101 can be parallel to each other and spaced apart, so as to facilitate fixed connection by fasteners 13.

[0104] For example, the connecting part 101 can be a plate-like structure, the connecting part 101 can be integrally formed into the corresponding arc-shaped hoop, and both the first arc-shaped hoop 11 and the second arc-shaped hoop 12 can be made of high-strength metal material, such as stainless steel.

[0105] When clamp 100 is in the open state, the first arc-shaped clamp 11 and the second arc-shaped clamp 12 can be fitted onto the outside of bushing 300. Then, clamp 100 is switched to the closed state by connecting the connecting portion 101 of the first arc-shaped clamp 11 and the connecting portion 101 of the second arc-shaped clamp 12 with fasteners 13. This tightens clamp 100 into the closed state, clamping the two bushings 300 to be connected. During the tightening process of clamp 100 into the closed state, the sealing gasket 200 is compressed, achieving a seal between the interfaces of the two bushings 300.

[0106] For any of the clamps 100 mentioned above, the sealing gasket 200 provided in this embodiment of the utility model can be used as follows: Figure 15 The annular gasket 200a shown may also include, for example, Figure 15 The multiple arc-shaped gaskets 200b shown are connected end to end in sequence to form an annular gasket.

[0107] Taking the annular gasket 200a as an example, its flexible outer ring portion 201 and rigid inner ring portion 202 are both integral annular structures. In this embodiment of the invention... Figure 4 This example illustrates that the sealing gasket 200 is an annular gasket 200a.

[0108] Taking a sealing gasket 200 comprising multiple arc-shaped gaskets 200b as an example, the multiple arc-shaped gaskets 200b are connected end-to-end in sequence to form a gasket with a circular structure. The number of arc-shaped gaskets 200b can be two, three, etc., and both the flexible outer ring portion 201 and the rigid inner ring portion 202 are correspondingly set as arc-shaped structures. For any two adjacent arc-shaped gaskets 200b, matching inserts and slots can be respectively provided at their two ends distributed circumferentially. The inserts are fitted into the slots, thereby realizing the connection between the arc-shaped gaskets 200b.

[0109] Figure 15 The example shows a sealing gasket 200 comprising two arc-shaped gaskets 200b. One arc-shaped gasket 200b has inserts at both ends distributed along the circumferential direction, and the other arc-shaped gasket 200b has slots at both ends distributed along the circumferential direction. The inserts are adapted to be inserted into the slots to achieve the connection between the two arc-shaped gaskets 200b.

[0110] For any of the aforementioned pipe sealing connection devices, as shown in the attached document... Figure 14 As shown, the fastener 13 includes a screw 131 and a nut 132. The screw 131 passes through the two connecting parts 101 and is threadedly connected to the nut 132.

[0111] The first arc-shaped hoop 11 and the second arc-shaped bushing 12 have corresponding through holes on their two connecting parts 101. The screw 131 passes through the two connecting parts 101 and one end of the screw 131 is connected to one of the connecting parts 101. The nut 132 is threadedly connected to the part of the screw 131 that extends to the outside of the two connecting parts 101 and can abut against the other connecting part 101.

[0112] The fastener 13 adopts a threaded connection between the screw 131 and the nut 132. By adjusting the screwing stroke of the nut 132, the clamping force of the clamp 100 can be adjusted, thereby adjusting the volume of the cavity formed between the first arc-shaped clamp 11 and the second arc-shaped clamp 12, making it suitable for the connection of various pipelines.

[0113] The screw 131 can be arranged independently relative to the first arc-shaped hoop 11 and the second arc-shaped hoop 12. In this case, the screw 131 can be provided with a nut head, which abuts against one of the connecting parts 101 to limit the screw 131 in the axial direction.

[0114] The screw 131 can also be fixedly connected to one of the connecting portions 101 of the first arc-shaped hoop 11 and the second arc-shaped hoop 12, for example, Figure 14 The example shows that the connecting part 101 of the first arc-shaped hoop 11 is configured to include a through groove 1011 with an opening. One end of the screw 131 is pinned to the connecting part 101 of the first arc-shaped hoop 11 by a pin, and the other end of the screw 131 passes through the screw hole 1011 of the connecting part 101 of the second arc-shaped hoop 12. This method can effectively prevent the screw 131 from being lost during the assembly stage and simplify the assembly efficiency.

[0115] For fasteners including screw 131 and nut 132, after a period of use in the pipeline sealing connection device, when the thread tightening torque is checked, there is usually a significant torque decay (especially in high-temperature scenarios, the torque reduction can be as high as 60%), increasing the risk of pipeline leakage and the frequency of maintenance. Furthermore, nut 132 is also prone to loosening due to vibration during transportation.

[0116] To solve the above-mentioned technical problems, the present invention makes the following improvements to the fastener 13, so that the fastener 13 satisfies at least one of the following conditions:

[0117] Condition 1: The inner threaded surface of the nut 132 has an anti-slip coating. Condition 2: The fastener 13 also includes a washer 133, which is fitted over the screw 131 and sandwiched between the nut 132 and the corresponding connecting portion 101. Condition 3: One of the two connecting portions 101 is connected to one end of the screw 131, and the other of the two connecting portions 101 has a screw hole 1011 that closes in the circumferential direction. In some examples, the fastener 13 can simultaneously satisfy conditions 1, 2, and 3.

[0118] For condition one, the inner surface of nut 132 is provided with an anti-slip coating. For example, the anti-slip coating may be a nylon coating, and accordingly, nut 132 may be called a nylon nut.

[0119] By having an anti-slip coating, such as a nylon layer (polyamide, etc.), on the inner surface of the nut 132, based on the elastic deformation capability and high coefficient of friction of these anti-slip coatings, when the nut 132 is tightened, the anti-slip coating is squeezed and embedded into the thread of the screw 131, forming a mechanical engagement. During vibration, the elastic deformation of the anti-slip coating continuously fills the thread gap, preventing relative slippage and achieving enhanced dynamic friction, giving the nut 132 stronger anti-loosening reliability. Moreover, this type of coating has strong adaptability to ambient temperature, and is suitable not only for high-temperature environments but also for low-temperature environments.

[0120] It can be seen that by providing an anti-slip coating on the inner surface of the nut 132, the nut 132 can be effectively prevented from disengaging from the screw 131. For example, it can prevent loosening between the nut 132 and the screw 131 caused by transportation vibration, while ensuring that the tightening torque of the fastener 13 always remains at a reliable level and enhancing the adaptability of the fastener 13 to the ambient temperature.

[0121] For condition two, the fastener 13 also includes a washer 133, which is sleeved on the outside of the screw 131 and sandwiched between the nut 132 and the corresponding connecting part 101.

[0122] By incorporating a shim 133, the bearing area is increased, and mechanical interference or elastic preload prevents the nut 132 from disengaging due to vibration, impact, or temperature changes. Therefore, by incorporating a shim 133, the nut 132 can be effectively prevented from disengaging from the screw 131. For example, it prevents loosening between the nut 132 and the screw 131 caused by transportation vibration, while ensuring that the tightening torque of the fastener 13 remains at a reliable level, preventing the risk of seal failure due to torque decay. Furthermore, the shim 133 also enhances the fastener 13's adaptability to ambient temperature.

[0123] For condition three, please refer to Figure 12The example illustrates that the connecting part 101 closest to the nut 132 has a screw hole 1011. The sidewalls of the screw hole 1011, distributed circumferentially, have a continuous annular structure; for example, the screw hole 1011 is a strip-shaped hole. By making the screw hole 1011 a closed hole arranged circumferentially, abnormal slippage of the screw 131 and nut 132 during use is effectively avoided, preventing the risk of vibration-induced disengagement.

[0124] On the other hand, this utility model embodiment also provides a pipeline sealing connection device, as shown in the attached... Figure 4 -Appendix Figure 10 As shown, the pipeline sealing connection device 00211 includes: a clamp 100, a sealing gasket 200, and two bushings 300. The clamp 100 is closable. The sealing gasket 200 includes a flexible outer ring portion 201 and a rigid inner ring portion 202 fixedly connected to the inner side of the flexible outer ring portion 201. The thickness of the rigid inner ring portion 202 is less than the thickness of the flexible outer ring portion 201, wherein the thickness direction is along the axial direction of the sealing gasket 200. Each bushing 300 is used to accommodate the pipe end of a sub-pipeline 00212. One end of the bushing 300 has an annular flange 301, which protrudes radially outward along the bushing 300. The rigid inner ring portion 202 and at least a portion of the flexible outer ring portion 201 are sandwiched between the annular flanges 301 of the two bushings 300. The clamp 100 surrounds the outside of the two annular flanges 301 to tighten the two annular flanges 301.

[0125] It should be noted that the structure, arrangement and function of the pipeline sealing connection device 00211 involved in this embodiment of the present utility model can be referred to the structure, arrangement and function of the pipeline sealing connection device 00211 involved in the above-mentioned energy storage system.

[0126] The pipeline sealing connection device 00211 provided in this embodiment of the utility model has a sealing gasket 200 comprising a flexible outer ring portion 201 and a rigid inner ring portion 202 coupled to the inner side of the flexible outer ring portion 201. Thus, the sealing gasket 200 is a combined rigid-flexible gasket. Furthermore, by making the thickness of the rigid inner ring portion 202 less than the thickness of the flexible outer ring portion 201, the flexible outer ring portion 201 is controlled to be at a suitable compression ratio. This arrangement can solve the sealing failure and overflow caused by over-compression of the sealing gasket 200. This is because when the clamp 100 tightens the two annular flanges 301, see... Figure 7 and Figure 8The rigid inner ring 202 of the sealing gasket 200 serves as a compression limiting structure, forming a support interface with the annular flange 301. It provides a mechanical stop, limiting the maximum compression of the sealing gasket 200 and preventing excessive compression of the flexible outer ring 201, thus avoiding irreversible deformation due to over-compression. Under suitable compression, the flexible outer ring 201 of the sealing gasket 200 fills the gap between the two annular flanges 301 through elastic deformation, achieving interface sealing. Therefore, the pipeline sealing connection device 00211 provided in this embodiment of the present invention, by limiting excessive deformation of the sealing gasket 200 through the thinner rigid inner ring 202 and achieving reliable sealing through the thicker flexible outer ring 201, not only ensures a reliable sealing effect for the sealing gasket 200 but also effectively solves the problems of excessive compression ratio during use, as well as aging without rebound and reduced lifespan caused by high compressive stress. When applied to the liquid cooling line 0021 of an energy storage system, it is more beneficial to improve the connection reliability of the liquid cooling line 0021, effectively prevent the sealing failure of the liquid cooling line 0021, and improve the operational reliability of the energy storage system.

[0127] In some examples, further details are attached. Figure 12 -Appendix Figure 14 As shown, the clamp 100 includes a first arc-shaped clamp body 11 and a second arc-shaped clamp body 12. Arc-shaped placement grooves 103 are provided on the inner sidewalls of the first arc-shaped clamp body 11 and the second arc-shaped clamp body 12 along the circumferential direction. The arc-shaped placement grooves 103 are used to accommodate an annular flange 301. Both the first arc-shaped clamp body 11 and the second arc-shaped clamp body 12 have a first end and a second end distributed along the circumferential direction. The first ends of the first arc-shaped clamp body 11 and the second arc-shaped clamp body 12 are hinged together. The second ends of both the first arc-shaped clamp body 11 and the second arc-shaped clamp body 12 are provided with connecting portions 101. The two connecting portions 101 are detachably connected by fasteners 13.

[0128] Fastener 13 includes a screw 131 and a nut 132. The screw 131 passes through two connecting portions 101 and is threadedly connected to the nut 132. Fastener 13 satisfies at least one of the following conditions: Condition 1, the inner threaded surface of the nut 132 has an anti-slip coating; Condition 2, fastener 13 also includes a washer 133, which is sleeved outside the screw 131 and sandwiched between the nut 132 and the corresponding connecting portion 101; Condition 3, one of the two connecting portions 101 is connected to one end of the screw 131, and the other has a closed screw hole 1011. The sidewalls of the screw hole 1011, distributed circumferentially, form a continuous annular structure. In some examples, fastener 13 can simultaneously satisfy conditions 1, 2, and 3.

[0129] By providing an anti-slip coating on the inner surface of the nut 132, it is possible to effectively prevent the nut 132 from disengaging from the screw 131. For example, it can prevent loosening between the nut 132 and the screw 131 caused by transportation vibration, while ensuring that the tightening torque of the fastener 13 always remains at a reliable level and enhancing the adaptability of the fastener 13 to ambient temperature.

[0130] By incorporating a shim 133, the bearing area is increased, and mechanical interference or elastic preload prevents the nut 132 from disengaging due to vibration, impact, or temperature changes. Therefore, by incorporating a shim 133, the nut 132 can be effectively prevented from disengaging from the screw 131. For example, it prevents loosening between the nut 132 and the screw 131 caused by transportation vibration, while ensuring that the tightening torque of the fastener 13 remains at a reliable level, preventing the risk of seal failure due to torque decay. Furthermore, the shim 133 also enhances the fastener 13's adaptability to ambient temperature.

[0131] By making the screw hole 1011 a closed hole arranged in the circumferential direction, abnormal slippage of the screw 131 and nut 132 during use is effectively avoided, thus preventing the risk of vibration-induced disengagement.

[0132] The above description is only for the purpose of enabling those skilled in the art to understand the technical solution of this utility model, and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy storage system, characterized in that, The energy storage system includes a battery pack (001) and a liquid cooling module (002). The liquid cooling module (002) is used at least for heat exchange of the battery pack (001). The liquid cooling module (002) includes a liquid cooling pipeline (0021). The liquid cooling pipeline (0021) includes a pipeline sealing connection device (00211) and a sub-pipeline (00212) connected through the pipeline sealing connection device (00211). The pipeline sealing connection device (00211) includes: a clamp (100), which is openable and closable; A sealing gasket (200) includes a flexible outer ring portion (201) and a rigid inner ring portion (202) fixedly connected to the inner side of the flexible outer ring portion (201). The thickness of the rigid inner ring portion (202) is less than the thickness of the flexible outer ring portion (201), wherein the thickness direction is along the axial direction of the sealing gasket (200). Two bushings (300), each bushing (300) for receiving the end of one of the sub-pipes (00212), one end of the bushing (300) having an annular flange (301) that protrudes radially outward along the bushing (300), a rigid inner ring (202) and at least a portion of the flexible outer ring (201) are sandwiched between the annular flanges (301) of the two bushings (300), and a clamp (100) is wrapped around the outside of the two annular flanges (301) for clamping the two annular flanges (301).

2. The energy storage system according to claim 1, characterized in that, The flexible outer ring (201) is an EPDM rubber outer ring, and the rigid inner ring (202) is a metal inner ring.

3. The energy storage system according to claim 1, characterized in that, The flexible outer ring (201) has a groove (2010) on its inner side, and the rigid inner ring (202) has a boss (2020) on its outer side. The boss (2020) is accommodated and fixedly connected to the inside of the groove (2010).

4. The energy storage system according to claim 3, characterized in that, The flexible outer ring portion (201) includes a first ring segment (2011) and a second ring segment (2012) distributed outward in a radial direction; The first ring segment (2011) has a greater thickness than the second ring segment (2012) and is provided with the groove (2010); The thickness of the second ring segment (2012) is greater than the thickness of the rigid inner ring portion (202); The first ring segment (2011) and the second ring segment (2012) are both sandwiched between the two annular flanges (301).

5. The energy storage system according to claim 4, characterized in that, The inner walls of the two annular flanges (301) have limiting grooves (302), and the first annular segment (2011) is at least partially accommodated inside the limiting grooves (302).

6. The energy storage system according to claim 4, characterized in that, The flexible outer ring portion (201) further includes a third ring segment (2013), wherein the first ring segment (2011), the second ring segment (2012), and the third ring segment (2013) are distributed outward in a radial direction in sequence; The third ring segment (2013) is located outside the annular flange (301) and abuts against the outer wall of at least one of the two annular flanges (301).

7. The energy storage system according to any one of claims 1-5, characterized in that, The clamp (100) includes a first arc-shaped clamp body (11) and a second arc-shaped clamp body (12). The inner sidewalls of the first arc-shaped clamp body (11) and the second arc-shaped clamp body (12) are provided with arc-shaped placement grooves (103) in the circumferential direction. The arc-shaped placement grooves (103) are used to accommodate the annular flange (301). Both the first arc-shaped hoop (11) and the second arc-shaped hoop (12) have a first end and a second end distributed along the circumferential direction. The first ends of the first arc-shaped hoop (11) and the second arc-shaped hoop (12) are hinged together. The second ends of the first arc-shaped hoop (11) and the second arc-shaped hoop (12) are provided with connecting parts (101). The two connecting parts (101) are detachably connected by fasteners (13).

8. The energy storage system according to claim 7, characterized in that, The fastener (13) includes a screw (131) and a nut (132), wherein the screw (131) passes through the two connecting parts (101) and is threadedly connected to the nut (132); Wherein, the fastener (13) satisfies at least one of the following conditions: Condition 1: The inner threaded surface of the nut (132) has an anti-slip coating; Condition 2, the fastener (13) further includes a washer (133), which is sleeved on the outside of the screw (131) and sandwiched between the nut (132) and the corresponding connecting part (101); Condition 3: One of the two connecting parts (101) is connected to one end of the screw (131), and the other has a screw hole (1011), wherein the sidewalls of the screw hole (1011) distributed in the circumferential direction have a continuous annular structure.

9. A pipeline sealing connection device, characterized in that, The pipeline sealing connection device includes: a clamp (100), which is openable and closable; A sealing gasket (200) includes a flexible outer ring portion (201) and a rigid inner ring portion (202) fixedly connected to the inner side of the flexible outer ring portion (201). The thickness of the rigid inner ring portion (202) is less than the thickness of the flexible outer ring portion (201), wherein the thickness direction is along the axial direction of the sealing gasket (200). Two bushings (300), each bushing (300) is used to receive the end of a sub-pipe (00212) to be connected. One end of the bushing (300) has an annular flange (301) that protrudes outward along the radial direction of the bushing (300). A rigid inner ring (202) and at least a portion of the flexible outer ring (201) are sandwiched between the annular flanges (301) of the two bushings (300). A clamp (100) is wrapped around the outside of the two annular flanges (301) for clamping the two annular flanges (301).

10. The pipeline sealing connection device according to claim 9, characterized in that, The clamp (100) includes a first arc-shaped clamp body (11) and a second arc-shaped clamp body (12). The inner sidewalls of the first arc-shaped clamp body (11) and the second arc-shaped clamp body (12) are provided with arc-shaped placement grooves (103) in the circumferential direction. The arc-shaped placement grooves (103) are used to accommodate the annular flange (301). Both the first arc-shaped hoop (11) and the second arc-shaped hoop (12) have a first end and a second end distributed along the circumferential direction. The first ends of the first arc-shaped hoop (11) and the second arc-shaped hoop (12) are hinged together. The second ends of the first arc-shaped hoop (11) and the second arc-shaped hoop (12) are provided with connecting parts (101). The two connecting parts (101) are detachably connected by fasteners (13). The fastener (13) includes a screw (131) and a nut (132), wherein the screw (131) passes through the two connecting parts (101) and is threadedly connected to the nut (132); Wherein, the fastener (13) satisfies at least one of the following conditions: Condition 1: The inner threaded surface of the nut (132) has an anti-slip coating; Condition 2, the fastener (13) further includes a washer (133), which is sleeved on the outside of the screw (131) and sandwiched between the nut (132) and the corresponding connecting part (101); Condition 3: One of the two connecting parts (101) is connected to one end of the screw (131), and the other has a closed screw hole (1011). The sidewalls of the screw hole (1011) distributed in the circumferential direction have a continuous annular structure.

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