Aluminum-plastic composite liquid cooling plate and its preparation method

Abstract

This invention provides an aluminum-plastic composite liquid cooling plate, comprising an aluminum alloy harmonica tube plate, plastic plugs, and aluminum alloy adhesive-filled fasteners. The aluminum alloy harmonica tube plate is provided with liquid flow channels and micropores. The plastic plugs include inlet / outlet plugs and flow guide plugs, which are respectively glued to the aluminum alloy harmonica tube plate. The aluminum alloy adhesive-filled fasteners are sleeved on and glued to the aluminum alloy harmonica tube plate, forming a micro-mortise and tenon structure between the aluminum alloy adhesive-filled fasteners and the micropores. The aluminum alloy adhesive-filled fasteners have recessed mounting grooves and adhesive-filling grooves, with adhesive filling the grooves. The inlet / outlet plugs and flow guide plugs are inserted into and glued to the mounting grooves. The outer periphery of the inlet / outlet plugs and flow guide plugs are respectively provided with sealing protrusions, which, together with the mounting grooves, form an adhesive-filling cavity, which is filled with adhesive. This invention also provides a method for preparing the aluminum-plastic composite liquid cooling plate.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling device technology, and in particular to an aluminum-plastic composite liquid cooling plate and its preparation method. Background Technology

[0002] Currently, liquid-cooled plates, as a highly efficient thermal management material, are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand for them is also constantly increasing.

[0003] In existing technologies, the requirements for liquid cooling plates are becoming increasingly stringent, and lightweighting has become a trend. Commonly used structural materials for liquid cooling plates are aluminum alloys. Traditional all-aluminum brazed liquid cooling plates are very mature, but they still have certain limitations. Because the curb weight of new energy electric vehicles is heavier than that of traditional fuel vehicles, all-aluminum liquid cooling plates are, to some extent, unable to meet the lightweighting requirements of new energy electric vehicles.

[0004] Aluminum-plastic composite liquid cooling plates outperform all-aluminum liquid cooling plates in terms of lightweight performance, while maintaining the same heat transfer efficiency and possessing good insulation and pressure resistance. However, aluminum-plastic composite liquid cooling plates are generally made of nylon plastic and aluminum alloy, and the properties of the two are too different. In addition, the environment and testing conditions for the use of liquid cooling plates are relatively harsh, making it technically challenging to combine them and achieve good sealing, reliability, stability and safety. Summary of the Invention

[0005] The purpose of this invention is to provide an aluminum-plastic composite liquid cooling plate and its preparation method, aiming to solve or at least partially solve the shortcomings of the above-mentioned background technology. It is used for heat dissipation in energy storage power systems. The aluminum-plastic composite liquid cooling plate not only has a simple structure, but also has certain insulation performance and lightweight, and can save space. In addition, its aluminum alloy harmonica tube plate and plastic plug can be tightly bonded. The preparation method of the aluminum-plastic composite liquid cooling plate is not only simple, but also makes the aluminum-plastic composite liquid cooling plate have good sealing performance, reliability, stability and safety.

[0006] This invention provides an aluminum-plastic composite liquid cooling plate, comprising an aluminum alloy harmonica tube plate, plastic plugs, and aluminum alloy filler buckles. The aluminum alloy harmonica tube plate has several liquid flow channels spaced apart inside, and multiple micropores are recessed on the surfaces of both ends. The plastic plugs include inlet / outlet plugs and flow guide plugs respectively installed at both ends of the aluminum alloy harmonica tube plate, and the inlet / outlet plugs and flow guide plugs are respectively bonded to the aluminum alloy harmonica tube plate. The inlet / outlet plugs have an inlet and an outlet on the same side, and are provided with an inlet chamber, an outlet chamber, and a first flow guide chamber located between the inlet and outlet chambers. The inlet and outlet chambers are respectively connected to the inlet and outlet. The flow guide plug is provided with a second flow guide chamber. The liquid outlet chamber, the first guide chamber, and the second guide chamber are all connected to the liquid flow channel. The aluminum alloy filler buckle is fitted onto the aluminum alloy harmonica tube plate and glued to both ends of the aluminum alloy harmonica tube plate. The aluminum alloy filler buckle and the micropore are glued to form a micro tenon structure. The two ends of the aluminum alloy filler buckle are respectively provided with an installation groove and a filler groove. The filler groove is filled with adhesive. At least part of the liquid inlet / outlet plug and the guide plug are inserted into the installation groove and glued to the groove wall. The outer periphery of the liquid inlet / outlet plug and the guide plug are respectively provided with a sealing protrusion. The end of the aluminum alloy filler buckle with the installation groove abuts against the sealing protrusion. The sealing protrusion and the installation groove together form a filler cavity, which is filled with adhesive.

[0007] Furthermore, the inlet and outlet plugs are provided with a first mounting cavity that mates with the aluminum alloy harmonica tube plate, one end of which is inserted into the first mounting cavity and bonded to the cavity wall; the guide plugs are provided with a second mounting cavity that mates with the aluminum alloy harmonica tube plate, the other end of which is inserted into the second mounting cavity and bonded to the cavity wall.

[0008] Furthermore, the inlet chamber, outlet chamber, and first guide chamber are all connected to the first mounting chamber, and the inlet chamber and outlet chamber are respectively spaced apart from the adjacent first guide chamber, while the second guide chamber is connected to the second mounting chamber.

[0009] This invention also provides a method for preparing an aluminum-plastic composite liquid cooling plate, which includes the following steps:

[0010] S1. Perform nano-etching treatment on both ends of the aluminum alloy harmonica tube, perform surface deoxidation film treatment on the aluminum alloy filler buckle, and perform plasma polymerization degreasing treatment on the plastic plug.

[0011] S2. Apply a coupling agent modified primer to the contact surfaces between the aluminum alloy harmonica tube sheet, aluminum alloy filler buckle, and plastic plug, and then apply an adhesive.

[0012] S3. Assemble the plastic plugs onto both ends of the aluminum alloy harmonica tube, and assemble the aluminum alloy filler buckle onto the connection between the aluminum alloy harmonica tube and the plastic plug.

[0013] S4. Apply reinforcing adhesive to the connection between the aluminum alloy filler buckle and the plastic plug.

[0014] Furthermore, in step S1, the surfaces of both ends of the aluminum alloy harmonica tube plate are treated with a laser composite etching method to form multiple micropores.

[0015] Furthermore, the aluminum alloy harmonica tube plate that underwent surface nano-etching treatment in step S1 is coated with a superhydrophilic nano-TiO2 coating.

[0016] Furthermore, during the assembly of the aluminum alloy filler buckle in step S3, adhesive is filled into the filler cavity and filler groove respectively.

[0017] Furthermore, the coupling agent used is silane coupling agent KH-560, the adhesive is polyurethane interpenetrating network adhesive, and the reinforcing adhesive is nano-Al2O3 reinforcing adhesive.

[0018] This invention provides an aluminum-plastic composite liquid cooling plate for heat dissipation in energy storage power systems. It features a simple structure and low assembly difficulty. The plastic plug is lighter than existing aluminum alloy plugs and possesses certain insulation properties. The symmetrical placement of the inlet and outlet simplifies the piping design, saving installation space and increasing the space available for battery cells. The combination of the inlet chamber, outlet chamber, liquid flow channel, first guide chamber, and second guide chamber allows the liquid to flow uniformly within the aluminum alloy tube sheet, carrying away heat and achieving liquid cooling. The aluminum alloy filler clips are fitted onto the aluminum alloy harmonica tube plate, and the inlet / outlet plugs and flow guide plugs are respectively inserted into the mounting grooves of the aluminum alloy filler clips. The aluminum alloy filler clips and aluminum alloy harmonica tube plate together form a tenon-and-mortise structure with the inlet / outlet plugs and flow guide plugs respectively. The aluminum alloy harmonica tube plate, plastic plugs, and aluminum alloy filler clips are then fixed together by adhesive bonding, so that the aluminum alloy filler clips and micro-holes form a micro-tenon-and-mortise structure, achieving a tight connection between the aluminum alloy harmonica tube plate, plastic plugs, and aluminum alloy filler clips, thereby improving the sealing, reliability, stability, and safety of the aluminum-plastic composite liquid cooling plate.

[0019] This invention provides a method for preparing an aluminum-plastic composite liquid cooling plate. The process is simple, and through the mortise and tenon structure formed between the aluminum alloy harmonica tube plate, the aluminum alloy filler buckle, and the plastic end cap, the micro mortise and tenon structure formed between the aluminum alloy harmonica tube plate and the aluminum alloy filler buckle, the chemical bonding using a coupling agent, the physical fastening using adhesive, and the further sealing using reinforcing adhesive, the aluminum alloy harmonica tube plate, the aluminum alloy filler buckle, and the plastic end cap are tightly bonded together. This solves the problem of liquid leakage in the adhesive bonding and ensures that the aluminum-plastic composite liquid cooling plate has good sealing performance, reliability, stability, safety, and durability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of an aluminum-plastic composite liquid cooling plate according to the present invention.

[0022] Figure 2 for Figure 1 The diagram shows a partial schematic of the aluminum-plastic composite liquid cooling plate.

[0023] Figure 3 for Figure 2 Cross-section of the aluminum-plastic composite liquid cooling plate shown Figure 1 .

[0024] Figure 4 for Figure 2 Cross-section of the aluminum-plastic composite liquid cooling plate shown Figure 2 .

[0025] Figure 5 for Figure 4 The diagram shown is an exploded view of the aluminum-plastic composite liquid cooling plate.

[0026] Figure 6 for Figure 4 A magnified diagram of point A in the middle.

[0027] Figure 7 for Figure 4 A magnified diagram of point B in the middle.

[0028] Figure 8 for Figure 5 A magnified diagram of point C.

[0029] Figure 9 for Figure 5 A magnified diagram of point D in the middle.

[0030] Figure 10 for Figure 1 The image shows a three-dimensional view of the aluminum alloy harmonica tube.

[0031] Figure 11 for Figure 10 A magnified diagram of point E in the middle.

[0032] Figure 12 This is a schematic diagram of the micro mortise and tenon structure in this invention.

[0033] Figure 13for Figure 1 The diagram shows a three-dimensional view of the inlet / outlet plug.

[0034] Figure 14 for Figure 1 The diagram shows a three-dimensional view of the flow guide plug.

[0035] Figure 15 This is a flowchart illustrating the preparation method of the aluminum-plastic composite liquid cooling plate according to the first embodiment of the present invention.

[0036] Figure 16 This is a flowchart illustrating the preparation method of the aluminum-plastic composite liquid cooling plate according to the second embodiment of the present invention.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 10. Aluminum alloy harmonica tube plate; 11. Liquid flow channel; 12. Partition strip; 13. Micropore; 20. Inlet / outlet plugs; 21. Inlet; 22. Outlet; 23. Inlet chamber; 24. Outlet chamber; 25. First guide chamber; 26. First mounting chamber; 27. Inlet channel; 28. Outlet channel; 29. ​​First partition block; 291. First insertion groove; 30. Guide plug; 31. Second guide chamber; 32. Second mounting chamber; 33. Second partition block; 331. Second insertion groove; 40. Aluminum alloy glue-filling buckle; 41. Mounting groove; 42. Glue-filling groove; 50. Sealing protrusion; 51. Mating groove; 60. Glue-filling cavity; 70. Abutment surface; 80. Cured adhesive; 90. Micro tenon and mortise structure. Detailed Implementation

[0039] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0040] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0041] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, 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 present invention.

[0042] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0043] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0044] Please see Figures 1-5 and Figures 10-14 The present invention provides an aluminum-plastic composite liquid cooling plate, comprising an aluminum alloy harmonica tube plate 10, a plastic end cap, and an aluminum alloy filler buckle 40.

[0045] The aluminum alloy harmonica tube plate 10 has several liquid channels 11 spaced apart inside, with partition strips 12 between adjacent liquid channels 11. The inner diameter and number of liquid channels 11 can be adjusted as needed. Multiple micropores 13 are recessed on the surfaces of both ends of the aluminum alloy harmonica tube plate 10. Furthermore, the structural design of the aluminum alloy harmonica tube plate 10 can be optimized according to different application scenarios, such as adjusting the overall thickness, shape, and layout of the liquid channels 11, to achieve maximum weight reduction while ensuring strength.

[0046] The plastic plug includes inlet / outlet plugs 20 and flow guide plugs 30 respectively installed at both ends of the aluminum alloy harmonica tube plate 10. The inlet / outlet plugs 20 and flow guide plugs 30 are respectively bonded to the contact surfaces of the aluminum alloy harmonica tube plate 10. The inlet / outlet plug 20 has an inlet port 21 and an outlet port 22 arranged on the same side, and the inlet / outlet plug 20 is provided with an inlet chamber 23, an outlet chamber 24, and a first flow guide located between the inlet chamber 23 and the outlet chamber 24. The flow chamber 25, the inlet chamber 23, and the outlet chamber 24 are respectively connected to the inlet port 21 and the outlet port 22. The flow guide plug 30 is provided with a second flow guide chamber 31. The inlet chamber 23, the outlet chamber 24, the first flow guide chamber 25, and the second flow guide chamber 31 are all connected to the liquid flow channel 11. More specifically, the inlet port 21 and the inlet chamber 23 are connected through the inlet channel 27, and the outlet port 22 and the outlet chamber 24 are connected through the outlet channel 28.

[0047] The aluminum alloy filler buckle 40 is sleeved on the aluminum alloy harmonica tube plate 10 and glued to the contact surfaces at both ends of the aluminum alloy harmonica tube plate 10. The aluminum alloy filler buckle 40 and the micro-hole 13 are glued to form a micro tenon structure 90. One end of the aluminum alloy filler buckle 40 is recessed with an installation groove 41. At least part of the liquid inlet / outlet plug 20 and the flow guide plug 30 are inserted into the installation groove 41 and glued to the groove wall of the installation groove 41.

[0048] More specifically, the contact points between the two ends of the aluminum alloy harmonica tube 10 and the aluminum alloy filler buckle 40 are treated with nano-etching to form multiple micro-holes 13. This increases the roughness of the contact surfaces between the two ends of the aluminum alloy harmonica tube 10 and the aluminum alloy filler buckle 40, allowing the adhesive to penetrate into the etched micro-holes 13. The cured adhesive 80 forms a micro-mortise and tenon structure 90 with the micro-holes 13, creating an anchor bolt effect and tightly bonding the aluminum alloy harmonica tube 10 and the aluminum alloy filler buckle 40.

[0049] In this embodiment, the plastic plug is made of nylon.

[0050] As described above, the aluminum-plastic composite liquid cooling plate provided by this invention is used for heat dissipation in energy storage power systems. Its structure is simple and assembly is easy. The plastic plug is lighter than the aluminum alloy plugs in the prior art and has certain insulation properties. The same-side arrangement of the inlet 21 and outlet 22 simplifies the piping design for connecting the aluminum-plastic composite liquid cooling plate, saving installation space and increasing the installation space for the battery cells. The cooperation of the inlet chamber 23, outlet chamber 24, liquid flow channel 11, first guide chamber 25, and second guide chamber 31 allows the liquid to flow evenly within the aluminum alloy harmonica tube plate 10, carrying away heat and achieving liquid cooling. The aluminum alloy filler is used for heat dissipation. 40 pieces are installed on the aluminum alloy harmonica tube plate 10, and the inlet / outlet plugs 20 and the flow guide plugs 30 are respectively inserted into the mounting grooves 41 of the aluminum alloy filler buckles 40. The aluminum alloy filler buckles 40 and the aluminum alloy harmonica tube plate 10 are combined with the inlet / outlet plugs 20 and the flow guide plugs 30 to form a tenon and mortise structure. The aluminum alloy harmonica tube plate 10, the plastic plugs and the aluminum alloy filler buckles 40 are then fixed together by adhesive bonding, so that the aluminum alloy filler buckles 40 and the micro-holes 13 form a micro tenon and mortise structure 90. This achieves a tight connection between the aluminum alloy harmonica tube plate 10, the plastic plugs and the aluminum alloy filler buckles 40, thereby improving the sealing, reliability, stability and safety of the aluminum-plastic composite liquid cooling plate.

[0051] Please see Figure 3 , Figure 13 and Figure 14The inlet / outlet plug 20 is provided with a first mounting cavity 26 that mates with the aluminum alloy harmonica tube plate 10. One end of the aluminum alloy harmonica tube plate 10 is inserted into the first mounting cavity 26 and bonded to the cavity wall of the first mounting cavity 26. One end of the inlet / outlet plug 20 is inserted into the mounting groove 41 of the aluminum alloy filler buckle 40, and the aluminum alloy filler buckle 40 is bonded to the aluminum alloy harmonica tube plate 10. Through the cooperation of the above structures, the aluminum alloy filler buckle 40 and the aluminum alloy harmonica tube plate 10 are combined to form a tenon and mortise structure with the inlet / outlet plug 20.

[0052] The flow guide plug 30 is provided with a second mounting cavity 32 that mates with the aluminum alloy harmonica tube 10. The other end of the aluminum alloy harmonica tube 10 is inserted into the second mounting cavity 32 and glued to the cavity wall of the second mounting cavity 32. One end of the flow guide plug 30 is inserted into the mounting groove 41 of another aluminum alloy filler buckle 40, and the aluminum alloy filler buckle 40 is glued to the aluminum alloy harmonica tube 10. Through the cooperation of the above structures, the aluminum alloy filler buckle 40 and the aluminum alloy harmonica tube 10 are combined to form a tenon and mortise structure with the flow guide plug 30.

[0053] Furthermore, the inlet chamber 23, the outlet chamber 24, and the first guide chamber 25 are all connected to the first mounting chamber 26, and the inlet chamber 23 and the outlet chamber 24 are respectively spaced apart from the adjacent first guide chamber 25, and the second guide chamber 31 is connected to the second mounting chamber 32.

[0054] More specifically, the end of the inlet / outlet plug 20 with the first mounting cavity 26 is divided by the first partition block 29 into an inlet cavity 23, an outlet cavity 24, and a first guide cavity 25 that communicate with the liquid flow channel 11. The first partition block 29 is recessed with a first insertion groove 291 corresponding to the partition strip 12 of the aluminum alloy harmonica tube plate 10. When the aluminum alloy harmonica tube plate 10 is inserted into the first mounting cavity 26 of the inlet / outlet plug 20, the partition strip 12 is inserted into the first insertion groove 291. In addition, the inlet / outlet plug 20 may be provided with one or more first guide cavities 25. When multiple first guide cavities 25 are provided in the inlet / outlet plug 20, adjacent first guide cavities 25 are spaced apart by the first partition block 29.

[0055] The end of the flow guide plug 30 with the second mounting cavity 32 is divided into multiple second flow guide cavities 31 that communicate with the liquid flow channel 11 by a second partition block 33. The second partition block 33 is recessed with a second insertion groove 331 corresponding to the partition strip 12 of the aluminum alloy harmonica tube plate 10. When the aluminum alloy harmonica tube plate 10 is inserted into the second mounting cavity 32 of the flow guide plug 30, the partition strip 12 is inserted into the second insertion groove 331. Adjacent second flow guide cavities 31 are spaced apart by the second partition block 33.

[0056] Please see Figure 3In this embodiment, the inlet / outlet plug 20 is provided with a first guide cavity 25, and the guide plug 30 is provided with two second guide cavities 31. The inlet / outlet plug 20 is provided with two first partition blocks 29, and the inlet cavity 23, the first guide cavity 25, and the outlet cavity 24 are spaced apart by these two first partition blocks 29. The guide plug 30 is provided with a second partition block 33, and the two second guide cavities 31 are spaced apart by these two second partition blocks 33. The two ends of the aluminum alloy harmonica tube plate 10 are respectively inserted into the first mounting cavity 26 and the second mounting cavity 32. Through the cooperation of the first partition block 29, the second partition block 33, and the partition strip 12, the liquid flows in different directions within the liquid flow channels 11 in different areas to achieve a continuous "N"-shaped route, thereby enabling the aluminum-plastic composite liquid cooling plate to remove more heat and greatly improve the heat dissipation effect.

[0057] In addition, the number of the first flow guide cavity 25 and the second flow guide cavity 31 can be flexibly adjusted according to the liquid flow direction, heat dissipation requirements, etc.

[0058] Please see Figures 6-9 The outer periphery of the inlet / outlet plug 20 and the guide plug 30 are respectively provided with sealing protrusions 50. One end of the aluminum alloy filler buckle 40 with the mounting groove 41 abuts against the sealing protrusion 50. The sealing protrusion 50 and the mounting groove 41 together form a filler cavity 60. The filler cavity 60 is filled with adhesive to enhance the stability of the aluminum alloy filler buckle 40 and the plastic plug. At the same time, it further enhances the sealing performance of the aluminum-plastic composite liquid cooling plate.

[0059] More specifically, the sealing protrusion 50 is recessed with a mating groove 51, so the cross-section of the sealing protrusion 50 is L-shaped. The aluminum alloy glue-filled buckle 40 has an installation groove 41 at one end that abuts against the groove wall of the mating groove 51 and is fixed by adhesive bonding.

[0060] More specifically, the aluminum alloy filler buckle 40 has a filler groove 42 recessed at the other end where the mounting groove 41 is provided. The filler groove 42 is filled with adhesive to enhance the stability of the aluminum alloy filler buckle 40 and the aluminum alloy harmonica tube plate 10. At the same time, it further enhances the sealing performance of the aluminum-plastic composite liquid cooling plate.

[0061] In addition, the shape and size of the aluminum alloy filler buckle 40 can be customized according to the connection requirements of the aluminum alloy harmonica tube 10 and the plastic plug to ensure the stability of the connection.

[0062] This invention also provides a method for preparing an aluminum-plastic composite liquid cooling plate, which includes the following steps:

[0063] S1. Perform surface nano-etching treatment on both ends of the aluminum alloy harmonica tube plate 10, perform surface deoxidation film treatment on the aluminum alloy glue filler buckle 40, and perform plasma polymerization degreasing treatment on the plastic plug.

[0064] S2. Apply a coupling agent modified primer to the contact surfaces between the aluminum alloy harmonica tube sheet 10, the aluminum alloy filler buckle 40, and the plastic plug, and then apply an adhesive.

[0065] S3. Assemble the plastic plugs to both ends of the aluminum alloy harmonica tube 10, and assemble the aluminum alloy filler buckle 40 to the connection between the aluminum alloy harmonica tube 10 and the plastic plugs.

[0066] S4. Apply reinforcing adhesive to the connection between the aluminum alloy filler buckle 40 and the plastic plug.

[0067] In step S1, the two ends of the aluminum alloy harmonica tube plate 10 and the contact surface of the aluminum alloy filler buckle 40 are subjected to surface nano-etching to form multiple micro-holes 13, which increases the roughness of the contact surface between the aluminum alloy harmonica tube plate 10 and the aluminum alloy filler buckle 40. This allows the adhesive in the subsequent steps to penetrate into the etched micro-holes. The cured adhesive 80 forms a micro-mortise and tenon structure 90 with the micro-hole, forming an anchor bolt effect, so that the aluminum alloy harmonica tube plate 10 and the aluminum alloy filler buckle 40 are tightly bonded.

[0068] In step S1, plasma polymerization degreasing treatment is performed on the plastic plug, which can improve its surface activity, making it easier for the plastic plug to bond with the aluminum alloy harmonica tube plate 10 and the aluminum alloy glue filler buckle 40.

[0069] In step S2, the coupling agent reacts with the aluminum alloy and the plastic to form chemical bonds, thereby achieving a tight bond between the aluminum alloy and the plastic and enhancing the sealing performance of the aluminum-plastic composite liquid cooling plate.

[0070] Specifically, the connection between the aluminum alloy filler buckle 40 and the plastic plug in step S4 refers to the contact surface 70 between the end of the aluminum alloy filler buckle 40 with the mounting groove 41 and the mating groove 51 of the sealing protrusion 50. Applying reinforcing adhesive to this contact surface 70 can further enhance the sealing performance of the aluminum-plastic composite liquid cooling plate.

[0071] The present invention provides a method for preparing an aluminum-plastic composite liquid cooling plate. The process is simple. Through the tenon and mortise structure formed between the aluminum alloy harmonica tube plate 10, the aluminum alloy filler buckle 40, and the plastic plug, the micro tenon and mortise structure 90 between the aluminum alloy harmonica tube plate 10 and the aluminum alloy filler buckle 40, the chemical bonding using a coupling agent, the physical fastening using an adhesive, and the further sealing using a reinforcing adhesive, the aluminum alloy harmonica tube plate 10, the aluminum alloy filler buckle 40, and the plastic plug are tightly bonded together. This solves the problem of liquid leakage in the adhesive bonding and ensures that the aluminum-plastic composite liquid cooling plate has good sealing performance, reliability, stability, safety, and durability.

[0072] More specifically, in step S1, the aluminum alloy harmonica tube plate 10 is treated with surface nano-pores using a laser composite etching method.

[0073] More specifically, the coupling agent is silane coupling agent KH-560, the adhesive is polyurethane interpenetrating network adhesive, and the reinforcing adhesive is nano-Al2O3 reinforcing adhesive.

[0074] Alternatively, the plastic plugs can be injection molded onto both ends of the aluminum alloy harmonica tube plate 10.

[0075] For more details, please refer to Figure 15 The method for preparing the aluminum-plastic composite liquid cooling plate according to the first embodiment includes the following steps:

[0076] S1. Perform surface nano-etching treatment on both ends of the aluminum alloy harmonica tube plate 10, perform surface deoxidation film treatment on the aluminum alloy glue filler buckle 40, and perform plasma polymerization degreasing treatment on the plastic plug.

[0077] S2. Apply a coupling agent modified primer to the contact surfaces between the aluminum alloy harmonica tube sheet 10, the aluminum alloy filler buckle 40, and the plastic plug, and then apply an adhesive.

[0078] S3. Assemble the plastic plugs to both ends of the aluminum alloy harmonica tube 10, and assemble the aluminum alloy filler buckle 40 to the connection between the aluminum alloy harmonica tube 10 and the plastic plugs.

[0079] S4. Fill the filling cavity 60 and filling groove 42 with adhesive respectively.

[0080] S5. Apply reinforcing adhesive to the connection between the aluminum alloy filler buckle 40 and the plastic plug.

[0081] More specifically, the aluminum-plastic composite liquid cooling plate in the above embodiment is provided with a filling cavity 60 and a filling groove 42. In step S4, adhesive is filled into the filling cavity 60 and the filling groove 42 respectively to achieve full coverage of each position with adhesive, ensuring the reliability and stability of the connection between the aluminum alloy filling buckle 40 and the plastic plug, and between the aluminum alloy filling buckle 40 and the aluminum alloy harmonica tube plate 10, while further enhancing the sealing performance of the aluminum-plastic composite liquid cooling plate.

[0082] For more details, please refer to Figure 16 The preparation method of the aluminum-plastic composite liquid cooling plate in the second embodiment includes the following steps:

[0083] S1. Perform surface nano-etching treatment on both ends of the aluminum alloy harmonica tube plate 10, perform surface deoxidation film treatment on the aluminum alloy glue filler buckle 40, and perform plasma polymerization degreasing treatment on the plastic plug.

[0084] S2. Coat the aluminum alloy harmonica tube 10 with a superhydrophilic nano TiO2 coating and let it dry.

[0085] S3. Apply a coupling agent modified primer to the contact surfaces between the aluminum alloy harmonica tube 10, the aluminum alloy filler buckle 40, and the plastic plug, and then apply an adhesive.

[0086] S4. Assemble the plastic plugs to both ends of the aluminum alloy harmonica tube 10, and assemble the aluminum alloy filler buckle 40 to the connection between the aluminum alloy harmonica tube 10 and the plastic plugs.

[0087] S5. Fill the filling cavity 60 and filling groove 42 with adhesive respectively.

[0088] S6. Apply reinforcing adhesive to the connection between the aluminum alloy filler buckle 40 and the plastic plug.

[0089] In step S2, a superhydrophilic nano-TiO2 coating is applied to all contact surfaces between the aluminum alloy harmonica tube plate 10 and the plastic plug, making the surface of the aluminum alloy harmonica tube plate 10 with nano-etched holes hydrophilic, so that the surface can react and bond with the plastic better.

[0090] In addition, the aluminum-plastic composite liquid cooling plate prepared by the preparation method of any of the above embodiments is subjected to an airtightness test. Qualified products that pass the test are processed in the next process, while unqualified products that fail the test are selected for other processing methods.

[0091] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An aluminum-plastic composite liquid cooling plate, characterized in that, include: An aluminum alloy harmonica tube plate (10) has several liquid channels (11) spaced apart inside, and multiple micropores (13) are recessed on the surface of both ends. The plastic plug includes inlet / outlet plugs (20) and flow guide plugs (30) respectively installed at both ends of the aluminum alloy harmonica tube plate (10), and the inlet / outlet plugs (20) and the flow guide plugs (30) are respectively glued to the aluminum alloy harmonica tube plate (10). The inlet / outlet plugs (20) have an inlet port (21) and an outlet port (22) arranged on the same side, and the inlet / outlet plugs (20) are provided with an inlet chamber (23), an outlet chamber (24) and a flow guide plug located on the aluminum alloy harmonica tube plate (10). A first guide cavity (25) is provided between the liquid inlet cavity (23) and the liquid outlet cavity (24). The liquid inlet cavity (23) and the liquid outlet cavity (24) are respectively connected to the liquid inlet (21) and the liquid outlet (22). The guide plug (30) is provided with a second guide cavity (31). The liquid inlet cavity (23), the liquid outlet cavity (24), the first guide cavity (25), and the second guide cavity (31) are all connected to the liquid flow channel (11). An aluminum alloy filler buckle (40) is fitted onto the aluminum alloy harmonica tube plate (10) and glued to both ends of the aluminum alloy harmonica tube plate (10). The aluminum alloy filler buckle (40) and the micro-hole (13) are glued together to form a micro tenon structure (90). The two ends of the aluminum alloy filler buckle (40) are respectively provided with an installation groove (41) and a filler groove (42). The filler groove (42) is filled with adhesive. At least a portion of the inlet / outlet plug (20) and the flow guide plug (30) are inserted into the installation groove (41) and glued to the groove wall of the installation groove (41). The outer periphery of the inlet / outlet plug (20) and the guide plug (30) are respectively provided with sealing protrusions (50). The aluminum alloy glue-filling buckle (40) has one end of the mounting groove (41) that abuts against the sealing protrusion (50). The sealing protrusion (50) and the mounting groove (41) together form a glue-filling cavity (60), which is filled with adhesive.

2. The aluminum-plastic composite liquid cooling plate as described in claim 1, characterized in that, The inlet / outlet plug (20) is provided with a first mounting cavity (26) that mates with the aluminum alloy harmonica tube plate (10). One end of the aluminum alloy harmonica tube plate (10) is inserted into the first mounting cavity (26) and bonded to the cavity wall of the first mounting cavity (26). The flow guide plug (30) is provided with a second mounting cavity (32) that mates with the aluminum alloy harmonica tube plate (10). The other end of the aluminum alloy harmonica tube plate (10) is inserted into the second mounting cavity (32) and bonded to the cavity wall of the second mounting cavity (32).

3. The aluminum-plastic composite liquid cooling plate as described in claim 2, characterized in that, The inlet chamber (23), the outlet chamber (24), and the first guide chamber (25) are all connected to the first mounting chamber (26), and the inlet chamber (23) and the outlet chamber (24) are respectively spaced apart from the adjacent first guide chamber (25). The second guide chamber (31) is connected to the second mounting chamber (32).

4. A method for preparing an aluminum-plastic composite liquid cooling plate, used to prepare the aluminum-plastic composite liquid cooling plate as described in any one of claims 1-3, characterized in that, Includes the following steps: S1. Perform surface nano-etching treatment on both ends of the aluminum alloy harmonica tube plate (10), perform surface deoxidation film treatment on the aluminum alloy glue-filling buckle (40), and perform plasma polymerization degreasing treatment on the plastic plug. S2. Coupling agent modified primer is applied to the contact surfaces between the aluminum alloy harmonica tube plate (10), the aluminum alloy glue-filling buckle (40), and the plastic plug, and then adhesive is applied. S3. The plastic plugs are respectively assembled to both ends of the aluminum alloy harmonica tube plate (10), and the aluminum alloy filler buckle (40) is assembled to the connection between the aluminum alloy harmonica tube plate (10) and the plastic plugs. S4. Apply reinforcing adhesive to the connection between the aluminum alloy filler buckle (40) and the plastic plug.

5. The method for preparing the aluminum-plastic composite liquid cooling plate as described in claim 4, characterized in that, In step S1, the surfaces of both ends of the aluminum alloy harmonica tube plate (10) are treated with laser composite etching to form multiple micropores (13).

6. The method for preparing the aluminum-plastic composite liquid cooling plate as described in claim 4, characterized in that, The aluminum alloy harmonica tube plate (10) that has undergone surface nano-etching treatment in step S1 is coated with a superhydrophilic nano TiO2 coating.

7. The method for preparing the aluminum-plastic composite liquid cooling plate as described in claim 4, characterized in that, When assembling the aluminum alloy glue-filled buckle (40) in step S3, adhesive is filled into the glue-filling cavity (60) and the glue-filling groove (42) respectively.

8. The method for preparing the aluminum-plastic composite liquid-cooled plate according to any one of claims 4-7, characterized in that, The coupling agent is silane coupling agent KH-560, the adhesive is polyurethane interpenetrating network adhesive, and the reinforcing adhesive is nano-Al2O3 reinforcing adhesive.

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