Pipe joint, Liquid cooling plate, Liquid cooling system and Battery pack

Abstract

The utility model provides a kind of pipe fitting, liquid cooling plate, liquid cooling system and battery pack, including pipe fitting body, with oppositely arranged first surface and second surface, pipe fitting body is equipped with cavity;Connector is set to pipe fitting body and is communicated with cavity, connector includes first joint and second joint, first joint is set to first surface, and second joint is set to second surface;Among them, first joint and second joint have plug-in cooperation structure, for when two pipe fittings are adjacently arranged, the first joint of one pipe fitting is plugged in cooperation with the second joint of another pipe fitting, the scheme can realize the quick connection of pipe fitting in assembly process, simplify the assembly process of liquid cooling system, improve overall integration and connection efficiency, effectively improve the problem of low assembly efficiency caused by complex connection mode of liquid cooling system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a pipe fitting, a liquid cooling plate, a liquid cooling system, and a battery pack. Background Technology

[0002] Currently, the mainstream types of power batteries on the market include cylindrical batteries, prismatic batteries, and pouch batteries. Among them, large cylindrical batteries have been widely used in electric vehicle power systems due to their high energy density, good safety and stability, and relatively low manufacturing cost, and are expected to become the development trend of electric vehicle batteries. In practical applications, to meet the thermal management requirements of battery cells during operation, liquid cooling is usually used. A common structural form is that the liquid cooling plate is in direct contact with the side of the cell to improve heat exchange efficiency.

[0003] Taking the serpentine tube structure liquid cooling plate as an example, multiple serpentine tubes need to be connected to each other to form a complete liquid cooling channel network. This structure has a large contact area with the side of the battery cell, resulting in high cooling efficiency. Furthermore, by constructing a liquid cooling system in parallel, the system voltage drop can be reduced, providing certain thermal management advantages.

[0004] However, the connection area between adjacent serpentine tubes is usually arranged in a relatively compact manner, which is not conducive to the layout and installation of the pipeline, and thus restricts the assembly efficiency of the liquid cooling system to a certain extent. Utility Model Content

[0005] The embodiments of this utility model provide a pipe fitting, a liquid cooling plate, a liquid cooling system, and a battery pack, which can improve the technical problem of low assembly efficiency of liquid cooling systems.

[0006] In a first aspect, embodiments of the present invention provide a pipe fitting, comprising:

[0007] The pipe fitting body has a first surface and a second surface disposed opposite to each other, and the pipe fitting body is provided with a cavity;

[0008] A connector is disposed on the pipe fitting body and communicates with the cavity. The connector includes a first connector and a second connector, the first connector being disposed on the first surface and the second connector being disposed on the second surface.

[0009] The first connector and the second connector have a plug-in mating structure, which is used to allow the first connector of one pipe fitting to plug into the second connector of the other pipe fitting when the two pipe fittings are arranged adjacent to each other.

[0010] In one embodiment, the cavity includes a first cavity and a second cavity;

[0011] The number of connectors is two, one of which communicates with the first cavity and the other of which communicates with the second cavity.

[0012] In one embodiment, at least one of the first surface and the second surface is provided with a snap-fit ​​element for fixing the second connector of one of the two adjacent pipe fittings to the first connector of the other when the two pipe fittings are arranged adjacently.

[0013] In one embodiment, at least one of the first joint and the second joint is provided with an adjustment section, the adjustment section being configured to undergo elastic deformation under stress, and the structural stiffness of the adjustment section being less than that of the first joint or the second joint.

[0014] In one embodiment, the adjustment section is a corrugated section;

[0015] And / or, the material of the adjustment section is the same as the material of the first connector or the second connector.

[0016] In one embodiment, the adjustment section is connected to the first joint and / or the second joint by any one of integral molding, welding connection or injection molding.

[0017] In one embodiment, at least one of the first connector and the second connector is provided with a seal for forming a seal when inserted into two adjacent pipe fittings.

[0018] In one embodiment, the pipe fitting is manufactured by injection molding.

[0019] Secondly, embodiments of this utility model provide a liquid cooling plate, including the pipe fittings described in the above technical solution.

[0020] In one embodiment, it further includes a liquid cooling plate body and a connecting member, wherein the pipe fitting body is injection molded onto the connecting member;

[0021] One end of the connecting member is connected to the pipe fitting body, and the other end is connected to the liquid cooling plate body.

[0022] In one embodiment, the connecting member is surface-treated at least at the connection point with the pipe fitting body to increase the surface roughness of the connecting member; the surface treatment includes any one or more of nano-injection molding and texturing treatment.

[0023] Thirdly, embodiments of this utility model provide a liquid cooling system, including the pipe fittings described in the above technical solutions, or the liquid cooling plate described in the above technical solutions.

[0024] Fourthly, embodiments of this utility model provide a battery pack, including the pipe fittings described in the above technical solutions, or the liquid cooling plate described in the above technical solutions, or the liquid cooling system described in the above technical solutions.

[0025] The beneficial effects of the embodiments of this utility model are as follows:

[0026] In embodiments of this invention, by providing connectors on the pipe fitting body, adjacent pipe fittings can be plugged into each other, eliminating the need for external additional piping structures for fluid connection. This reduces the number of components and simplifies the connection process between pipe fittings in the liquid cooling system. The plug-in connection structure between the first and second connectors allows for rapid connection of adjacent pipe fittings during assembly, facilitating modular assembly and batch production. Providing connectors on the pipe fitting body improves the overall integration and connection efficiency of the liquid cooling system during installation, mitigating the low assembly efficiency caused by complex connection methods in liquid cooling systems. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front view of the pipe fitting provided in an embodiment of this utility model;

[0029] Figure 2 This is a three-dimensional schematic diagram of the pipe fitting provided in an embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the pipe fitting provided in the embodiment of this utility model when it is inserted and mated with an adjacent pipe fitting;

[0031] Figure 4 This is a three-dimensional schematic diagram of the liquid cooling plate provided in an embodiment of this utility model;

[0032] Figure 5 This is a partial structural schematic diagram of the liquid cooling plate provided in an embodiment of this utility model;

[0033] Figure 6 This is an exploded view of the liquid cooling plate provided in an embodiment of this utility model;

[0034] Figure 7 This is a partial perspective view of the battery pack provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Liquid cooling plate body; 11. Liquid cooling channel; 12. Liquid inlet; 13. Liquid outlet; 20. Connecting component; 100. Pipe fitting body; 110. First surface; 120. Second surface; 130. Cavity; 131. First cavity; 132. Second cavity; 140. Snap-fit ​​component; 200. Connecting component; 210. First connector; 211. Adjustment section; 220. Second connector; 221. Sealing component. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0038] According to the first aspect of this application, referring to Figures 1 to 7 This application provides a pipe fitting for use with a liquid cooling plate. Exemplarily, the liquid cooling plate has a liquid cooling channel 11 inside, and the pipe fitting is connected to the liquid cooling plate to achieve communication with the liquid cooling channel 11. Specifically, coolant can be introduced into the liquid cooling channel 11 through the pipe fitting, and after heat exchange is completed through the liquid cooling channel 11, it is then discharged through the pipe fitting, thereby achieving cooling of the battery cell.

[0039] In some embodiments, multiple liquid cooling plates can be arranged side by side to form a group of liquid cooling modules (see reference). Figure 5 , Figure 7 Each liquid cooling plate is equipped with a pipe fitting, and the pipe fittings on adjacent liquid cooling plates are arranged adjacent to each other. By connecting the adjacent pipe fittings, the coolant flow path between the liquid cooling plates in the liquid cooling module can be made continuous, thereby forming a universal circulating cooling path.

[0040] In some embodiments, refer to Figure 1 , Figure 2 The fitting includes a fitting body 100 and a connector 200. The fitting body 100 is provided with a cavity 130, which is used to communicate with the liquid cooling channel 11 in the liquid cooling plate, so that the coolant can be introduced into the cavity 130 from the liquid cooling channel 11, or exported from the cavity 130 and enter the liquid cooling channel 11.

[0041] In some embodiments, refer to Figure 1 , Figure 2 The pipe fitting body 100 has a first surface 110 and a second surface 120 disposed opposite to each other. It is understood that the first surface 110 and the second surface 120 may be parallel to each other, substantially parallel, or opposed to each other. Specifically, the first surface 110 and the second surface 120 may be geometrically planar or curved surfaces with a certain curvature. For example, referring to… Figure 1 , Figure 3 As shown, the first surface 110 is the left side surface of the pipe fitting body 100, and the second surface 120 is its right side surface.

[0042] In some embodiments, refer to Figure 1 , Figure 2 The connector 200 is disposed on the pipe fitting body 100 and communicates with the cavity 130. It is understood that the connector 200 forms a piping structure for coolant flow, thereby enabling fluid exchange of coolant between the cavity 130 and external or adjacent structures. Exemplarily, the connector 200 can be integrally formed on the pipe fitting body 100, or it can be connected to the pipe fitting body 100 by welding or other methods. In this embodiment, the connector 200 is integrally disposed on the pipe fitting body 100.

[0043] Specifically, the connector 200 is connected to the cavity 130 via its internal piping, allowing coolant to flow into or out of the cavity 130. Furthermore, the connector 200 is configured to interlock with connectors 200 on adjacent liquid cooling plates, enabling communication between cavities 130 of adjacent connector bodies 100 and thus forming a continuous coolant flow path. This interlocking structure improves the connection efficiency between liquid cooling modules, simplifies the overall installation process of the liquid cooling system, and is suitable for modular assembly scenarios.

[0044] In some embodiments, refer to Figure 1 , Figure 2 The connector 200 includes a first connector 210 and a second connector 220. The first connector 210 and the second connector 220 have a plug-in mating structure, which is used to enable the first connector 210 of one pipe connector to plug into the second connector 220 of the other pipe connector when the two pipe connectors are arranged adjacent to each other.

[0045] Specifically, the first connector 210 and the second connector 220 have mutually matching structural features in terms of shape and size. For example, the first connector 210 can be an outward-protruding plug structure, while the second connector 220 is a corresponding inward-recessed socket structure, or both have a sealing ring groove and a positioning ring platform structure to form a relatively reliable plug-in mating relationship.

[0046] Reference Figure 2 , Figure 3 When two pipe fittings are arranged adjacent to each other, the first connector 210 of one pipe fitting can be inserted into the second connector 220 of the other pipe fitting, forming a plug-in mating state. This plug-in mating structure enables rapid connection between the bodies 100 of adjacent pipe fittings, allowing their cavities 130 to communicate and thus establishing a continuous coolant flow channel. Compared to the traditional method of connecting using intermediate additional pipe fittings, this plug-in structure reduces the number of connecting parts, simplifies the connection method of the liquid cooling system, and facilitates improved assembly efficiency and flow path layout flexibility of the modular liquid cooling system.

[0047] Furthermore, the mating relationship between the first connector 210 and the second connector 220 facilitates the positional calibration between the two adjacent pipe fittings, thereby helping to improve the assembly alignment accuracy and structural stability of the entire liquid cooling module. To adapt to different assembly requirements, the first connector 210 and the second connector 220 can be designed in a symmetrical or asymmetrical form, and can also be provided with chamfers, guide flanges, or limiting steps to guide the smooth insertion process.

[0048] It should be noted that the term "plug-in fit" can be understood as a connection method in which there is a mating relationship between the structural contact surfaces. In some embodiments, a rubber ring or a sealing layer may be used between the first connector 210 and the second connector 220 to enhance the sealing performance at the connection point.

[0049] Understandable, refer to Figure 2 , Figure 3 Both the first connector 210 and the second connector 220 are provided with an opening. The opening connects to the pipe inside the first connector 210 or the second connector 220, so that after the adjacent pipe fittings are plugged in, the coolant can flow from the cavity 130 of one pipe fitting into the cavity 130 of the adjacent pipe fitting through the through hole structure of the connector 200, thereby realizing continuous flow between the liquid cooling plates.

[0050] It should be noted that the structural form of the connector 200 may include quick-connect fittings, threaded connectors, or welded nozzles, etc., and the specific selection can be made according to the operating environment, fluid parameters, and module integration method of the cooling system. In some embodiments, the two connectors 200 may also have different specifications or interface types to further distinguish between liquid inlet and liquid outlet functions, facilitating installation identification and maintenance operations.

[0051] In some embodiments, refer to Figure 2 , Figure 3The cavity 130 includes a first cavity 131 and a second cavity 132. Exemplarily, the first cavity 131 is used for coolant to enter the liquid cooling channel 11, and the second cavity 132 is used for coolant to flow out of the liquid cooling channel 11 after heat exchange. It is understood that the first cavity 131 and the second cavity 132 are isolated from each other and are respectively connected to the cooling channel.

[0052] In some embodiments, the cooling channel has an inlet 12 and an outlet 13 (see reference). Figure 6 For example, the inlet 12 is connected to the first chamber 131 to guide the coolant into the cooling channel, and the outlet 13 is connected to the second chamber 132 to discharge the cooled coolant after heat exchange. Through the above structural connection, the directional flow path control of the coolant can be achieved, which is beneficial to improving fluid stability and heat exchange efficiency during the heat exchange process.

[0053] For example, the first cavity 131 and the second cavity 132 are isolated by a structural partition. This structural partition can be a one-piece molded structure or an insert partition, thereby helping to prevent the mixing of inlet and outlet liquids and improving the independence of the cooling path and heat exchange efficiency. The isolation structure can be appropriately designed with reinforcing ribs or supporting structures to improve the structural stability of the pipe fittings, especially when subjected to fluid impact or external assembly stress.

[0054] It should be noted that the specific shapes and dimensions of the first cavity 131 and the second cavity 132 can be designed to match the overall structural layout of the liquid cooling plate, the required flow rate, and the cooling capacity. For example, the first cavity 131 and the second cavity 132 can be rectangular cavities, cylindrical cavities, or other geometric structures suitable for fluid distribution and collection. In addition, baffles or buffer structures can be set inside the cavity 130 according to actual needs to guide the fluid flow direction and reduce flow rate fluctuations, thereby improving system stability.

[0055] In some embodiments, refer to Figure 2 , Figure 3 There are two connectors 200, one of which is connected to the first cavity 131 and the other is connected to the second cavity 132.

[0056] For example, one connector 200 is connected to the first cavity 131, forming a coolant inlet path; the other connector 200 is connected to the second cavity 132, forming a coolant outlet path. This configuration allows the coolant to be introduced into the liquid cooling plate via one connector 200, undergo heat exchange through the liquid cooling channel 11, and then be discharged via the other connector 200, thus forming a complete coolant circulation path.

[0057] Specifically, the connector 200 is a tubular structure provided on the pipe fitting body 100, and has a through hole structure inside. The through hole structure is connected to the cavity 130, thereby providing a flow path for the coolant during use.

[0058] It is understood that the first connector 210 and the second connector 220 of the connector 200 communicating with the first cavity 131 are both connected to the first cavity 131 through internally provided pipes; similarly, the first connector 210 and the second connector 220 of the connector 200 communicating with the second cavity 132 are also connected to the second cavity 132 through pipes. This structural design allows the two connectors 200 on each pipe fitting body 100 to be used for inputting and outputting coolant with different flow directions, avoiding the risk of mixing between hot and cold fluids.

[0059] In some embodiments, refer to Figure 2 , Figure 3 At least one of the first surface 110 and the second surface 120 is provided with a snap-fit ​​element 140 for fixing the second connector 220 of one of the two adjacent pipe fittings to the first connector 210 of the other when the two pipe fittings are arranged adjacently. The snap-fit ​​element 140 is used to ensure that the two adjacent pipe fittings form a reliable structural connection after insertion and mating. Specifically, the snap-fit ​​element 140 enables the second connector 220 on one pipe fitting to be fixedly connected by snap-fit ​​after being inserted into the first connector 210 of another pipe fitting, thereby avoiding the risk of the connector becoming loose during use.

[0060] Through this structural design, when the first connector 210 and the second connector 220 are inserted and mated, the snap-fit ​​component 140 can form a mechanical lock at the insertion point, thereby enhancing the connection strength to a certain extent and helping to maintain the stable connection state of the pipe fittings in the liquid cooling system. At the same time, this structure also helps to achieve rapid positioning and connection in batch assembly operations, improving the efficiency of component assembly.

[0061] For example, the snap-fit ​​element 140 can be an elastic structure disposed on the outer periphery of the connector, such as an elastic protrusion with an opening, a snap-fit ​​arm, a barb structure, or a deformable snap ring structure. This type of elastic structure can undergo a certain degree of elastic deformation during insertion to adapt to the insertion force and return to the locked position after insertion, thereby forming a reliable limiting and retaining function. The snap-fit ​​element 140 can cooperate with the insertion mating structure to enhance the locking performance while achieving the insertion connection.

[0062] It is understood that, in different implementations, the structure and material of the snap-fit ​​140 can be adjusted according to the usage environment, for example, by selecting materials with good plasticity or excellent heat resistance, in order to meet the thermomechanical stability requirements of the liquid cooling system under different operating conditions.

[0063] The snap-fit ​​connector 140 facilitates the rapid assembly and secure connection of components in the liquid cooling system, reducing reliance on auxiliary fasteners and thereby improving the assembly efficiency and structural integration of the liquid cooling system.

[0064] It is understood that the location and engagement method of the snap-fit ​​member 140 can have various variations in different embodiments. Specifically, the snap-fit ​​member 140 can be disposed on the first connector 210 or the second connector 220 to form a snap-fit ​​connection with the engagement structure provided on the other connector. For example, a snap-fit ​​arm structure can be provided outside the first connector 210 of a pipe connector to form a limiting engagement with the outer periphery of the second connector 220 of the adjacent pipe connector after insertion, thereby making the insertion state more stable.

[0065] In another embodiment, the snap-fit ​​element 140 can be disposed on the pipe fitting body 100 for engaging with another adjacent pipe fitting body 100, that is, the pipe fitting bodies 100 are directly positioned and held together by the snap-fit ​​structure. In this structure, the snap-fit ​​element 140 can be a positioning hook, elastic piece, or embedded groove structure disposed on the edge of the body to achieve direct mechanical engagement between the structures.

[0066] Furthermore, the snap-fit ​​component 140 can also be used to achieve indirect snap-fit ​​between the first connector 210 and the second connector 220 on the adjacent pipe fitting. That is, by setting a slot or positioning part on one connector, and cooperating with the protrusion, snap spring structure, etc. on the other connector, the position limit and connection fixation after insertion can be achieved.

[0067] In some embodiments, refer to Figure 2 , Figure 3 At least one of the first connector 210 and the second connector 220 is provided with an adjusting section 211. The adjusting section 211 is configured to undergo elastic deformation under stress, and its structural stiffness is less than that of the first connector 210 or the second connector 220. Specifically, the adjusting section 211 can be made of elastic material or designed with a specific geometry, so that during pipe fitting assembly, it can be appropriately adjusted and compensated according to actual dimensional errors, ensuring the butt joint connection between adjacent pipe fittings. It can be understood that the adjusting section 211 is more easily deformed than the first connector 210 or the second connector 220 to which it is connected. Under the same load, the adjusting section 211 is more suitable for generating a certain degree of deformation, thereby enabling the pipe fitting to adapt to different assembly deviations and facilitating the mating connection between adjacent pipe fittings. The structural stiffness of the adjusting section 211 refers to the average structural stiffness value of the entire area of ​​the adjusting section 211. Similarly, the structural stiffness of the first connector 210 or the second connector 220 also refers to the average structural stiffness of its entire area.

[0068] For example, the adjustment section 211 can withstand a certain external force during the insertion of the pipe fitting, generating elastic deformation to compensate for dimensional errors or deviations during manufacturing or installation. The adjustment section 211 is typically made of a material with elastic deformation characteristics, such as elastic rubber or metal spring material, or employs a structural design with micro-grooves and protrusions to further enhance adjustment and adaptability.

[0069] By incorporating the adjustment section 211, dimensional errors can be automatically compensated during assembly, reducing the impact of assembly errors on connection stability and improving the adaptability and flexibility of pipe fittings during manufacturing and installation. Simultaneously, the elastic deformation of the adjustment section 211 helps reduce joint loosening caused by environmental changes (such as temperature fluctuations and pipe vibrations), thereby enhancing the long-term stability and reliability of the connection.

[0070] The design of the regulating section 211 not only improves the assembly accuracy of the liquid cooling system, but also helps to optimize the overall performance of the liquid cooling system and improve the long-term operational reliability of the system.

[0071] In some embodiments, refer to Figure 2 , Figure 3 The adjusting section 211 is a corrugated section. Specifically, a corrugated section is a design that achieves elastic deformation by setting a structure with a corrugated shape. A portion of the first connector 210 and / or the second connector 220 can be configured as a corrugated section. Specifically, the corrugated section can be set within a certain area of ​​the first connector 210 and / or the second connector 220 to achieve elastic adjustment between the connectors. Its corrugated shape design allows the corrugated section to undergo elastic deformation under stress, thereby compensating for dimensional deviations caused by manufacturing tolerances or installation errors.

[0072] In some embodiments, the material of the adjustment section 211 is the same as that of the first connector 210 or the second connector 220.

[0073] The design principle of the corrugated section is that, through its undulating corrugated structure, the corrugated part can compress or expand when the joint is subjected to external force, producing elastic deformation to accommodate minor dimensional errors between adjacent pipe fittings. The shape and elastic characteristics of the corrugated section enable it to provide a large adjustment range and high stability, especially when pipe fittings are inserted into each other, ensuring a tight fit and a stable connection between the two fittings.

[0074] The advantage of corrugated sections lies in their ability to automatically adjust the fit between joints without adding extra components, thereby improving the reliability and flexibility of pipe fitting connections. This design not only simplifies the assembly process of pipe fittings but also improves the system's adaptability during long-term operation, especially its stability under environmental changes such as temperature and pressure.

[0075] In some embodiments, the adjustment segment 211 is connected to the first connector 210 and / or the second connector 220 by any of the following methods: integral molding, welding connection, or injection molding. It is understood that the adjustment segment 211 may be disposed within a certain area of ​​the first connector 210 and / or the second connector 220, and its function is to compensate for inaccuracies in the connection caused by dimensional tolerances or assembly errors through elastic deformation, thereby ensuring the stability and sealing of the connection.

[0076] Specifically, the one-piece molding method can ensure the integration of the adjustment section 211 with the first connector 210 or the second connector 220 by manufacturing it together, thus reducing additional assembly steps; the welding connection can provide a strong connection between the adjustment section 211 and the connector, which is suitable for applications that require strong connection strength; the injection molding method can produce a precise adjustment section 211 through a mold, which is highly adaptable and can flexibly adjust the shape and material of the adjustment section 211 during the production process.

[0077] In some embodiments, the adjusting section 211 may be part of the sidewall of the first connector 210 or the second connector 220, or it may be a complete section or a partial section. Specifically, the location and shape of the adjusting section 211 can be adjusted according to actual needs. It may be a local area on the sidewall of the connector, a continuous annular portion of the connector, or even an intermittent segment on the connector. Through this flexible design, the adjusting section 211 can undergo elastic deformation under stress, adapting to minor misalignments caused by dimensional tolerances, assembly errors, or other factors, thereby ensuring a reliable connection between the first connector 210 and the second connector 220.

[0078] In some embodiments, refer to Figure 2 , Figure 3 At least one of the first connector 210 and the second connector 220 is provided with a seal 221 to form a seal when inserted with two adjacent pipe fittings. By providing the seal 221, the risk of coolant leakage can be effectively suppressed during insertion, thereby improving the sealing reliability of the liquid cooling system to a certain extent.

[0079] For example, the seal 221 can be a sealing ring disposed on the first connector 210 or the second connector 220. The sealing ring can be made of an elastic material, suitable for forming a radial compression fit during insertion, thereby enhancing the sealing performance. In addition, the structure of the seal 221 can also include a sealing gasket, a lip ring, or other components with elastic sealing capabilities. The specific selection can be determined according to the requirements of sealing level, temperature range, and coolant medium adaptability in the application scenario.

[0080] In some embodiments, the pipe fitting is manufactured by injection molding. Exemplarily, the pipe fitting is made of plastic and integrally manufactured by injection molding; that is, the pipe fitting body 100, the first connector 210, and the second connector 220 are all integrally injection molded. Integral injection molding can reduce the number of connection points to a certain extent, reducing structurally weak areas caused by welding or assembly, thereby improving the structural strength and service life of the pipe fitting.

[0081] It should be noted that the specific molding method is not limited to completely one-piece molding; it can also be a combination of partial injection molding and partial welding connection. For example, the first connector 210 and the pipe fitting body 100 are integrally injection molded, while the second connector 220 is connected to the body by welding. In this embodiment, both the first connector 210 and the second connector 220 are integrally injection molded with the pipe fitting body 100, which helps to improve manufacturing efficiency and product consistency.

[0082] According to the second aspect of this application, referring to Figure 4 , Figure 5 This application provides a liquid cooling plate, including the pipe fittings described in the above embodiments. This liquid cooling plate possesses all the beneficial effects of the aforementioned pipe fittings, which will not be elaborated upon here.

[0083] In some embodiments, a connecting member 20 is further included, and the pipe fitting body 100 is injection molded onto the connecting member 20. Injection molding the pipe fitting body 100 together with the connecting member 20 facilitates connection with other mating components. By integrally injection molding the pipe fitting body 100 and the connecting member 20, a reliable connection between the plastic structure and the metal structure is achieved, thereby improving the ease of overall assembly and structural strength. Exemplarily, the connecting member 20 is made of metal, such as copper, aluminum, or stainless steel, which have good thermal conductivity, and can be used for subsequent welding connections with metal structures such as cooling plates.

[0084] In this embodiment, the connecting member 20 serves as an intermediate interface component, effectively simplifying the manufacturing process. Specifically, by first injection molding the pipe fitting body 100 onto the appropriately sized metal connecting member 20, and then connecting the connecting member 20 to larger or more complex components such as metal liquid cooling plates through welding or other methods, manufacturing flexibility can be improved and overall processing difficulty reduced to a certain extent. This is particularly suitable for applications requiring mass production or automated assembly. Simultaneously, the metal connecting member 20 also helps improve the temperature resistance and airtightness of the local structure, making it suitable for long-term use in liquid cooling systems.

[0085] In some embodiments, the connecting member 20 is surface-treated at least at the connection point with the pipe fitting body 100 to increase the surface roughness of the connecting member 200. This helps to enhance the mechanical interlocking force between the plastic injection layer and the metal surface, thereby improving the bonding strength and durability of the injection-molded structure.

[0086] It is understood that surface treatment methods may include one or more combinations of processes such as sandblasting, grinding, chemical etching, and laser etching. Through this treatment method, a micro-rough structure is formed to a certain extent, thereby improving the adhesion of molten plastic to the metal surface during injection molding. For example, the outer surface of the connector 20, except for the area connected to the pipe fitting body 100, may not undergo this type of surface treatment to avoid affecting the connection accuracy or functional structure of other components.

[0087] The above structural design helps to improve the structural stability and sealing reliability of the connection parts without increasing the structural complexity, making it suitable for long-term application in various liquid cooling environments.

[0088] In some embodiments, the surface treatment includes any one or more of nano-injection molding and texturing. Specifically, nano-injection molding can improve the mechanical bonding ability of the plastic melt to the metal surface during injection molding by forming micro- to nano-scale microstructures on the surface of the metal connector 20; while texturing, through methods such as sandblasting, chemical etching, or laser etching, forms a surface with a certain roughness in the connection area between the connector 20 and the pipe fitting body 100, which also helps to improve the bonding strength between the two.

[0089] By adopting the above surface treatment method, the connection stability between the pipe fitting body 100 and the connecting part 20 is enhanced to a certain extent, and the risk of delamination or leakage caused by factors such as thermal expansion and contraction and pressure fluctuations during use is reduced, thus making it suitable for the long-term stable operation of liquid cooling systems.

[0090] In some embodiments, refer to Figure 4 , Figure 5 It also includes a liquid cooling plate body 10, with one end of the connecting member 20 connected to the pipe fitting body 100 and the other end connected to the liquid cooling plate body 10. Specifically, the connecting member 20 can serve as an intermediate connecting structure to achieve fluid channel communication between the pipe fitting and the liquid cooling plate body 10. On the one hand, through its structural cooperation with the pipe fitting body 100, the connecting member 20 allows coolant to flow in or out through the cavity 130 of the pipe fitting; on the other hand, by connecting the connecting member 20 to the liquid cooling plate body 10, coolant can further enter or leave the cooling channels inside the liquid cooling plate.

[0091] This structural design facilitates the formation of a stable and sealed coolant flow path between the pipe fitting body 100 and the liquid cooling plate body 10, which is suitable for improving the overall structural integration and manufacturing flexibility of the liquid cooling system. For example, the connecting piece 20 and the liquid cooling plate body 10 can be connected by welding, threaded connection, snap-fit, or interference fit, thereby accommodating different installation methods and reliability requirements to a certain extent.

[0092] In some embodiments, the connecting member 20 is welded to the liquid cooling plate body 10. It is understood that the liquid cooling plate body 10 is made of a metal material, such as aluminum, copper, or stainless steel, which have good thermal conductivity, thereby improving the overall thermal conductivity and heat exchange capacity of the liquid cooling plate. Connecting the connecting member 20 and the liquid cooling plate body 10 by welding facilitates a stable connection between the two and forms a reliable sealing structure, allowing the coolant to flow smoothly into or out of the cooling channels inside the liquid cooling plate body 10.

[0093] In some embodiments, refer to Figure 4 , Figure 6 The liquid cooling plate body 10 has a liquid cooling channel 11. The first end of the liquid cooling plate body 10 is provided with an inlet 12 communicating with one end of the liquid cooling channel 11 and an outlet 13 communicating with the other end of the liquid cooling channel 11. The first end of the liquid cooling plate body 10 is connected to the connecting member 20. The inlet 12 communicates with the first cavity 131 of the pipe fitting body 100, and the outlet 13 communicates with the second cavity 132 of the pipe fitting body 100. Thus, coolant can enter the liquid cooling channel 11 from the first cavity 131 of the pipe fitting body 100 via the inlet 12, complete the heat exchange process inside the liquid cooling plate body 10, and then flow into the second cavity 132 via the outlet 13.

[0094] It is understood that the liquid inlet 12 and the liquid outlet 13 are located at the same end of the liquid cooling plate body 10, forming a closed return path inside the liquid cooling plate body 10, thus making the liquid cooling channel 11 U-shaped or approximately U-shaped. The U-shaped channel structure helps to achieve back-and-forth flow of coolant along the length of the liquid cooling plate, thereby improving the heat exchange coverage, enhancing temperature uniformity, and reducing the temperature difference between heat source areas to a certain extent. When applied to battery cell heat dissipation scenarios, the above structure helps to reduce the temperature difference between different battery cell units and enhance the thermal stability of the overall system.

[0095] According to the third aspect of this application, referring to Figure 4 , Figure 7 This application provides a liquid cooling system, including the pipe fittings or liquid cooling plates described in the above embodiments. This liquid cooling system possesses all the beneficial effects of the aforementioned pipe fittings or liquid cooling plates, which will not be elaborated upon here.

[0096] According to the fourth aspect of this application, referring to Figure 7 This application provides a battery pack, including the pipe fittings, liquid cooling plates, or liquid cooling systems described in the above embodiments. This battery pack possesses all the beneficial effects of the aforementioned pipe fittings, liquid cooling plates, or liquid cooling systems, which will not be elaborated upon here.

[0097] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pipe fitting, characterized in that, include: The pipe fitting body (100) has a first surface (110) and a second surface (120) disposed opposite to each other, and the pipe fitting body (100) is provided with a cavity (130); A connector (200) is disposed on the pipe fitting body (100) and communicates with the cavity (130). The connector (200) includes a first connector (210) and a second connector (220). The first connector (210) is disposed on the first surface (110), and the second connector (220) is disposed on the second surface (120). The first connector (210) and the second connector (220) have a plug-in mating structure, which is used to allow the first connector (210) of one pipe fitting to plug into the second connector (220) of the other pipe fitting when the two pipe fittings are arranged adjacent to each other.

2. The pipe fitting according to claim 1, characterized in that, The cavity (130) includes a first cavity (131) and a second cavity (132); The number of connectors (200) is two, one of which is connected to the first cavity (131) and the other is connected to the second cavity (132).

3. The pipe fitting according to claim 1, characterized in that, At least one of the first surface (110) and the second surface (120) is provided with a snap-fit ​​member (140) for fixing the second connector (220) of one of the two adjacent pipe fittings to the first connector (210) of the other when the two pipe fittings are arranged adjacently.

4. The pipe fitting according to claim 1, characterized in that, At least one of the first joint (210) and the second joint (220) is provided with an adjustment section (211), the adjustment section (211) being configured to undergo elastic deformation under stress, and the structural stiffness of the adjustment section (211) being less than that of the first joint (210) or the second joint (220).

5. The pipe fitting according to claim 4, characterized in that, The adjustment section (211) is a corrugated section; And / or, the material of the adjustment section (211) is the same as that of the first connector (210) or the second connector (220).

6. The pipe fitting according to claim 4, characterized in that, The adjustment section (211) is connected to the first joint (210) and / or the second joint (220) by any one of integral molding, welding connection or injection molding.

7. The pipe fitting according to any one of claims 1-6, characterized in that, At least one of the first connector (210) and the second connector (220) is provided with a seal (221) for forming a seal when inserted into two adjacent pipe fittings.

8. The pipe fitting according to any one of claims 1-6, characterized in that, The pipe fittings are manufactured by injection molding.

9. A liquid-cooled plate, characterized in that, Includes the pipe fittings as described in any one of claims 1-8.

10. The liquid cooling plate according to claim 9, characterized in that, It also includes a liquid cooling plate body (10) and a connecting member (20), wherein the pipe fitting body (100) is injection molded onto the connecting member (20); One end of the connecting member (20) is connected to the pipe fitting body (100), and the other end is connected to the liquid cooling plate body (10).

11. The liquid cooling plate according to claim 10, characterized in that, The connecting member (20) is surface treated at least at the connection point with the pipe fitting body (100) to increase the surface roughness of the connecting member (200); the surface treatment includes any one or more of nano-injection molding and texturing treatment.

12. A liquid cooling system, characterized in that, Includes the pipe fittings as described in any one of claims 1-8, or the liquid cooling plate as described in any one of claims 9-11.

13. A battery pack, characterized in that, Includes the pipe fittings as described in any one of claims 1-8, or the liquid cooling plate as described in any one of claims 9-11, or the liquid cooling system as described in claim 12.

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