Aluminum-plastic liquid cooling plate device and preparation method

Abstract

The invention discloses an aluminum-plastic liquid cooling plate device and a preparation method, the aluminum-plastic liquid cooling plate device comprises an aluminum alloy harmonica-shaped tube plate, a plastic plug and an aluminum alloy reinforcing cover, and a plurality of liquid runners are arranged in the aluminum alloy harmonica-shaped tube plate at intervals; the plastic plug comprises a liquid inlet plug and a liquid outlet plug which are installed at the two ends of the aluminum alloy harmonica-shaped tube plate respectively, a plurality of first flow guide cavities are formed in the liquid inlet plug at intervals, a plurality of second flow guide cavities are formed in the liquid outlet plug at intervals, and the first flow guide cavities and the second flow guide cavities are both communicated with the liquid flow channel; the liquid inlet plug and the liquid outlet plug are both sleeved with aluminum alloy reinforcing covers, and one end of each aluminum alloy reinforcing cover is connected with the aluminum alloy harmonica-shaped tube plate. The preparation method of the aluminum-plastic liquid cooling plate device is used for preparing the aluminum-plastic liquid cooling plate device.

Description

Technical Field

[0001] The invention relates to the field of liquid cooling devices, and in particular to an aluminum-plastic liquid cooling plate device and a preparation method thereof. Background Art

[0002] Traditional heat dissipation equipment is mostly made of metal materials such as steel, copper and aluminum. Although these materials have high thermal conductivity, they have certain limitations in actual heat transfer applications due to their high specific gravity, high cost, easy corrosion or difficulty in molding and processing. Their comprehensive performance can no longer meet the growing needs of industrial production and scientific and technological development.

[0003] For example: Lightweighting of cooling devices in thermal management systems for automotive battery packs is one of the requirements for the development of electric vehicles. At present, the commonly used structural material for liquid cooling plates is aluminum alloy, which has insufficient deformation resistance and poor waterproof sealing. With the development of liquid cooling plates, an aluminum-plastic liquid cooling plate composed of metal plates and plastic plates has emerged. It not only retains the main characteristics of the original component materials, but also overcomes the shortcomings of the original component materials, thereby obtaining many excellent material properties, such as weather resistance, corrosion resistance, earthquake resistance, light weight, and easy processing and molding. Therefore, aluminum-plastic plates should have a good prospect as liquid cooling modules. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an aluminum-plastic liquid cooling plate device and a preparation method thereof which has a simple structure, strong anti-deformation ability and can ensure reliability, safety and stability.

[0005] The invention discloses an aluminum-plastic liquid cooling plate device, comprising: An aluminum alloy harmonica tube plate, wherein a plurality of liquid flow channels are arranged at intervals inside the aluminum alloy harmonica tube plate; A plastic plug, comprising a liquid inlet plug and a liquid outlet plug respectively installed at both ends of the aluminum alloy harmonica tube plate, wherein the liquid inlet plug is provided with a plurality of first flow guide cavities at intervals, and the liquid outlet plug is provided with a plurality of second flow guide cavities at intervals, and the first flow guide cavity and the second flow guide cavity are both connected to the liquid flow channel; An aluminum alloy reinforcement cover is provided on at least a portion of the liquid inlet plug and the liquid outlet plug, and one end of the aluminum alloy reinforcement cover is connected to the aluminum alloy harmonica tube plate.

[0006] Furthermore, the first flow guide cavity located on both sides of the liquid inlet plug is connected to the liquid inlet and is provided with a liquid inlet channel; the second flow guide cavity located in the middle of the liquid outlet plug is connected to the liquid outlet and is provided with a liquid outlet channel.

[0007] Furthermore, the number of the liquid flow channels connected to the first guide cavity having the liquid inlet channel is less than the number of the liquid flow channels connected to the second guide cavity corresponding to the first guide cavity; the number of the liquid flow channels connected to the second guide cavity having the liquid outlet channel is less than the number of the liquid flow channels connected to the first guide cavity corresponding to the second guide cavity.

[0008] Furthermore, the liquid inlet is opened on at least one side surface of the liquid inlet plug; and the liquid outlet is opened on at least one side surface of the liquid outlet plug.

[0009] Furthermore, the aluminum alloy reinforcement cover is provided with a mounting groove for installing the plastic plug, the bottom wall of the mounting groove is provided with a mounting hole for accommodating the aluminum alloy harmonica tube plate, and the bottom wall of the mounting groove abuts against the outer surface of the aluminum alloy harmonica tube plate.

[0010] The present invention discloses a method for preparing an aluminum-plastic liquid cooling plate device, which is used to prepare the above-mentioned aluminum-plastic liquid cooling plate device, and comprises the following steps: S1, combining the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover and performing nano-etching to open holes; S2, filling the opening with an ultrasonic dip coupling agent; S3, performing a composite curing treatment on the connection surfaces of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover assembly and the plastic plug by injection molding; S4, the plastic plug and the aluminum alloy reinforcement cover are riveted.

[0011] Furthermore, the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover in step S1 are combined by laser welding.

[0012] Furthermore, in step S2, after the opening is filled with ultrasonic impregnation coupling agent, high-frequency hot pressing plastic film treatment is performed on both ends of the aluminum alloy harmonica tube plate.

[0013] Furthermore, the plastic plugs in step S3 are injection molded at both ends of the aluminum alloy harmonica tube plate.

[0014] Furthermore, in step S3, the outer surface of the plastic plug is subjected to plasma surface hydrophilic treatment.

[0015] The aluminum-plastic liquid cooling plate device provided by the present invention has not only a simple structure, but also a stronger ability to resist deformation; the preparation method of the aluminum-plastic liquid cooling plate device provided by the present invention proposes a preparation method of the aluminum-plastic liquid cooling plate device through physical bonding of aluminum-plastic materials, chemical bonding using a coupling agent, and mechanical fastening through rivets, which helps to ensure the reliability, stability and safety of the aluminum-plastic liquid cooling plate structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The present invention is a three-dimensional diagram of an aluminum-plastic liquid cooling plate device.

[0018] Figure 2 for Figure 1 A partial schematic diagram of the aluminum-plastic liquid cooling plate device shown.

[0019] Figure 3 for Figure 2 A three-dimensional exploded view of the aluminum-plastic liquid cooling plate device shown.

[0020] Figure 4 for Figure 2 The cross-sectional view of the aluminum-plastic liquid cooling plate device along a horizontal plane is shown.

[0021] Figure 5 for Figure 2 A partial enlarged view of point A of the aluminum-plastic liquid cooling plate device shown.

[0022] Figure 6 for Figure 2 A partial enlarged view of location B of the aluminum-plastic liquid cooling plate device shown.

[0023] Figure 7 for Figure 2 The shown figure is a cross-sectional view of the aluminum-plastic liquid cooling plate device along a vertical plane.

[0024] Figure 8 It is a three-dimensional diagram of the aluminum alloy harmonica tube plate of the present invention.

[0025] Fig. 9 It is a three-dimensional diagram of the aluminum alloy reinforcement cover of the present invention.

[0026] Fig.10 The invention discloses a liquid inlet plug with a single liquid inlet.

[0027] Fig.11 The invention discloses a liquid inlet plug with double liquid inlets.

[0028] Fig.12 The invention discloses a liquid outlet plug with a single liquid inlet.

[0029] Fig.13 The invention discloses a liquid outlet plug with double liquid inlets.

[0030] Fig.14 It is a schematic diagram of the application of the aluminum-plastic liquid cooling plate device of the present invention.

[0031] Fig.15 The present invention is a flowchart of a method for preparing an aluminum-plastic liquid cooling plate device according to a first embodiment of the present invention.

[0032] Fig.16 The present invention is a flowchart of a method for preparing an aluminum-plastic liquid cooling plate device according to a second embodiment of the present invention.

[0033] Fig.17 The present invention is a flowchart of a method for preparing an aluminum-plastic liquid cooling plate device according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0036] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0037] See also Figure 1-Figure 14 The present invention discloses an aluminum-plastic liquid cooling plate device, comprising: an aluminum alloy harmonica tube plate 10, a plastic plug and an aluminum alloy reinforcement cover 40.

[0038] See also Figure 4 A plurality of liquid flow channels 12 are arranged at equal intervals inside the aluminum alloy harmonica tube plate 10 , and a partition plate 11 is arranged between adjacent liquid flow channels 12 .

[0039] See also Figure 2-Figure 6 , Figure 11-Figure 14The plastic plug includes a liquid inlet plug 20 and a liquid outlet plug 30 respectively installed at both ends of the aluminum alloy harmonica tube plate 10. A plurality of first guide cavities 23 are arranged at intervals at one end of the liquid inlet plug 20 connected to the aluminum alloy harmonica tube plate 10, and a plurality of second guide cavities 33 are arranged at intervals at one end of the liquid outlet plug 30 connected to the aluminum alloy harmonica tube plate 10. Both the first guide cavities 23 and the second guide cavities 33 are arranged in communication with the liquid flow channel 12.

[0040] See also Figure 4-Figure 6 , Figure 11-Figure 14 Furthermore, one end of the liquid inlet plug 20 connected to the aluminum alloy harmonica tube plate 10 is divided into a plurality of first flow guide cavities 23 connected to the liquid flow channel 12 by a first partition plate 24, and one end of the liquid outlet plug 30 connected to the aluminum alloy harmonica tube plate 10 is divided into a plurality of second flow guide cavities 33 connected to the liquid flow channel 12 by a second partition plate 34. In addition, a first plug-in slot 25 is provided on the first partition plate 24 corresponding to the partition plate 11 of the aluminum alloy harmonica tube plate 10, and a second plug-in slot 35 is provided on the second partition plate 34 corresponding to the partition plate 11 of the aluminum alloy harmonica tube plate 10.

[0041] When the aluminum alloy harmonica tube plate 10 is connected to the liquid inlet plug 20 and the liquid outlet plug 30, one end of the aluminum alloy harmonica tube plate 10 is inserted into the first guide cavity 23 and the partition plate 11 is embedded in the first plug-in groove 25, and the other end of the aluminum alloy harmonica tube plate 10 is inserted into the second guide cavity 33 and the partition plate 11 is embedded in the second plug-in groove 35.

[0042] The first guide cavity 23 of the liquid inlet plug 20 and the second guide cavity 33 of the liquid outlet plug 30 are inserted into the aluminum alloy harmonica tube plate 10, so that the liquid can achieve a sealing effect between the liquid inlet plug 20 and the liquid outlet plug 30 and the aluminum alloy harmonica tube plate 10. The first partition plate 24 and the second partition plate 34 are arranged to make the liquid flow in different directions in the liquid flow channel 12 in different areas to achieve an "S" shaped route, and the partition plate 11 is inserted into the first plug-in groove 25 and the second plug-in groove 35 to further achieve a sealing effect, which greatly increases the safety, reliability and stability of the liquid circulation in the aluminum-plastic liquid cooling plate device.

[0043] At least part of the liquid inlet plug 20 and the liquid outlet plug 30 is covered with an aluminum alloy reinforcing cover 40, and one end of the aluminum alloy reinforcing cover 40 is connected to the aluminum alloy harmonica tube plate 10. By providing the aluminum alloy reinforcing cover 40, the overall strength of the aluminum-plastic liquid cooling plate device can be enhanced.

[0044] Please continue reading Figure 11-Figure 14 The first guide cavity 23 located on both sides of the liquid inlet plug 20 is connected to the liquid inlet 21 and has a liquid inlet channel 22 ; the second guide cavity 33 located in the middle of the liquid outlet plug 30 is connected to the liquid outlet 31 and has a liquid outlet channel 32 .

[0045] See also Figure 4 The number of liquid flow channels 12 connected to the first guide cavity 23 having the liquid inlet channel 22 is less than the number of liquid flow channels 12 connected to the second guide cavity 33 corresponding to the first guide cavity 23; the number of liquid flow channels 12 connected to the second guide cavity 33 having the liquid outlet channel 32 is less than the number of liquid flow channels 12 connected to the first guide cavity 23 corresponding to the second guide cavity 33.

[0046] When the liquid flows from the liquid inlet port 21 of the liquid inlet plug 20 through the liquid inlet channel 22 into the first guide chambers 23 located on both sides of the liquid inlet plug 20, and then flows into the second guide chambers 33 located on both sides of the liquid outlet plug 30 through the liquid flow channels 12 of the aluminum alloy harmonica tube plate 10 connected to the first guide chambers 23 on both sides of the liquid inlet plug 20, because there are many liquid flow channels 12 connected to the second guide chambers 33 located on both sides of the liquid outlet plug 30, part of the liquid continues to flow along the liquid flow channels 12 to the first guide chamber 23 located in the middle of the liquid inlet plug 20, and then flows along the liquid flow channel 12 connected to the first guide chamber 23 located in the middle of the liquid inlet plug 20 to the liquid outlet channel 32 of the liquid outlet plug 30, and finally flows out from the liquid outlet port 31 of the liquid outlet plug 30.

[0047] In the present embodiment, the two liquids entering the liquid inlet 21 of the liquid inlet plug 20 are both collected to the liquid outlet plug 30 through the "S" shaped flow channel, and then flow out from the liquid outlet 31 of the liquid outlet plug 30. The liquid forms a symmetrical double "S" shape in the aluminum-plastic liquid cooling plate device, so that the liquid flows evenly and is evenly distributed inside the aluminum alloy harmonica tube plate 10, thereby greatly improving the cooling effect.

[0048] See also Figure 11-Figure 14 The liquid inlet 21 is opened on at least one side surface of the liquid inlet plug 20 ; the liquid outlet 31 is opened on at least one side surface of the liquid outlet plug 30 .

[0049] For more details, see Figure 10-12 The liquid inlet 21 is opened on one side of the liquid inlet plug 20; the liquid outlet 31 is opened on one side of the liquid outlet plug 30, which is suitable for connecting the pipeline 50 and is located at the end of the entire pipeline 50, which has a sealing effect. Fig.10 , Fig.13 and Fig.14 The liquid inlet 21 is opened on the two opposite sides of the liquid inlet plug 20 and is set through; the liquid outlet 31 is opened on the two opposite sides of the liquid outlet plug 30 and is set through, which is suitable for connecting the pipeline 50 and is located in the middle position of the entire pipeline 50, and the liquid inlet 21 and the liquid outlet 31 on both sides are connected to the pipeline 50, which can achieve a through effect.

[0050] See also Fig. 9The aluminum alloy reinforcement cover 40 is provided with at least a portion of an installation groove 41 for installing a plastic plug, and the installation groove 41 has an open end. The open end of the aluminum alloy reinforcement cover 40 connected to the liquid inlet plug 20 faces one end of the liquid inlet plug 20 with a liquid inlet 21, and the open end of the aluminum alloy reinforcement cover 40 connected to the liquid outlet plug 30 faces one end of the liquid outlet plug 30 with a liquid outlet 31. The bottom wall of the installation groove 41 is provided with an installation hole 42 for accommodating the aluminum alloy harmonica tube plate 10, and the bottom wall of the installation groove 41 abuts against the outer surface of the aluminum alloy harmonica tube plate 10.

[0051] Furthermore, the aluminum alloy reinforcing cover 40 is provided with a connecting ear 43 in an extending direction away from the bottom wall of the installation groove, and a connecting hole 431 is opened on the connecting ear 43 .

[0052] See also Figure 15-17 The present invention also discloses a method for preparing an aluminum-plastic liquid cooling plate device, which is used to prepare the above-mentioned aluminum-plastic liquid cooling plate device, comprising the following steps: S1, combining an aluminum alloy harmonica tube plate and an aluminum alloy reinforcement cover and performing nano-etching to open holes; S2, using ultrasonic dip coupling agent to fill the opening; S3, performing a composite curing treatment on the connection surfaces of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover assembly and the plastic plug by injection molding; S4, plastic plug and aluminum alloy reinforcement cover are riveted.

[0053] See also Fig.15 In more detail, the preparation method of the aluminum-plastic liquid cooling plate device of the first embodiment comprises the following steps: S1. Laser welding the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover together S2, performing nano-etching and opening treatment on the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S3, using ultrasonic dip coupling agent to fill the opening; S4, performing a composite curing treatment on the connection surfaces of the plastic plug subjected to the plasma surface hydrophilic treatment and the components of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover by injection of glue; S5. Rivet the plastic plug and the aluminum alloy reinforcement cover.

[0054] See also Fig.16 In more detail, the preparation method of the aluminum-plastic liquid cooling plate device of the second embodiment comprises the following steps: S1. Assemble the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S2, performing nano-etching and hole-opening treatment on the components of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S3, filling the opening with an ultrasonic dip coupling agent; S4, high-frequency heating and pressing plastic film on both ends of the aluminum alloy harmonica tube plate; S5, performing a composite curing treatment on the connection surfaces of the plastic plug subjected to the plasma surface hydrophilic treatment and the components of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover by injection of glue; S6. Rivet the plastic plug and the aluminum alloy reinforcement cover.

[0055] See also Fig.17 In more detail, the preparation method of the aluminum-plastic liquid cooling plate device of the third embodiment comprises the following steps: S1. Assemble the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S2, performing nano-etching and hole-opening treatment on the components of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S3, filling the opening with an ultrasonic dip coupling agent; S4, injection molding plastic plugs at both ends of the aluminum alloy harmonica tube plate; S5. Performing nano-etching and hole-opening processing on the aluminum alloy reinforcement cover; S6, performing a composite curing treatment on the connection surfaces of the plastic plug, the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover; S7. Rivet the plastic plug and the aluminum alloy reinforcement cover.

[0056] Furthermore, the aluminum-plastic liquid cooling plate device prepared by the above preparation method is subjected to an airtightness test, and qualified products that pass the test enter the next process, while unqualified products that fail the test are selected for other processing methods.

[0057] See also Fig.10 The present invention discloses an aluminum-plastic liquid cooling plate device for a vehicle battery pack side. In the present invention, the aluminum-plastic liquid cooling plate devices are arranged at intervals, and the liquid inlets 21 of adjacent liquid inlet plugs 20 are connected by pipes 50, and the liquid outlets 31 of adjacent liquid outlet plugs 30 are connected by pipes 50, and the liquid flow channel of the aluminum alloy harmonica tube plate 10 is connected to form a passage from liquid inlet to liquid outlet. The battery packs are arranged at intervals between adjacent aluminum-plastic liquid cooling plate devices. The aluminum-plastic liquid cooling plate device of the present invention is located on the side of the battery pack, which is more conducive to the heat dissipation of the battery pack.

[0058] The aluminum-plastic liquid cooling plate device provided by the present invention has not only a simple structure, but also a stronger ability to resist deformation; the preparation method of the aluminum-plastic liquid cooling plate device provided by the present invention proposes a preparation method of the aluminum-plastic liquid cooling plate device through physical bonding of aluminum-plastic materials, chemical bonding using a coupling agent, and mechanical fastening through rivets, which helps to ensure the reliability, stability and safety of the aluminum-plastic liquid cooling plate structure.

[0059] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An aluminum-plastic liquid cooling plate device, characterized in that: include: An aluminum alloy harmonica tube plate, wherein a plurality of liquid flow channels are arranged at intervals inside the aluminum alloy harmonica tube plate; A plastic plug, comprising a liquid inlet plug and a liquid outlet plug respectively installed at both ends of the aluminum alloy harmonica tube plate, wherein the liquid inlet plug is provided with a plurality of first flow guide cavities at intervals, and the liquid outlet plug is provided with a plurality of second flow guide cavities at intervals, and the first flow guide cavity and the second flow guide cavity are both connected to the liquid flow channel; An aluminum alloy reinforcement cover is provided on at least a portion of the liquid inlet plug and the liquid outlet plug, and one end of the aluminum alloy reinforcement cover is connected to the aluminum alloy harmonica tube plate.

2. The aluminum-plastic liquid cooling plate device according to claim 1, characterized in that: The first flow guiding cavity located at both sides of the liquid inlet plug is connected to the liquid inlet and is provided with a liquid inlet channel; the second flow guiding cavity located in the middle of the liquid outlet plug is connected to the liquid outlet and is provided with a liquid outlet channel.

3. The aluminum-plastic liquid cooling plate device according to claim 2, characterized in that: The number of the liquid flow channels connected to the first guide cavity where the liquid inlet channel is provided is less than the number of the liquid flow channels connected to the second guide cavity corresponding to the first guide cavity; the number of the liquid flow channels connected to the second guide cavity where the liquid outlet channel is provided is less than the number of the liquid flow channels connected to the first guide cavity corresponding to the second guide cavity.

4. The aluminum-plastic liquid cooling plate device according to claim 2, characterized in that: The liquid inlet is opened on at least one side surface of the liquid inlet plug; the liquid outlet is opened on at least one side surface of the liquid outlet plug.

5. The aluminum-plastic liquid cooling plate device according to claim 1, characterized in that: The aluminum alloy reinforcing cover is provided with an installation groove for installing the plastic plug, the bottom wall of the installation groove is provided with an installation hole for accommodating the aluminum alloy harmonica tube plate, and the bottom wall of the installation groove abuts against the outer surface of the aluminum alloy harmonica tube plate.

6. A method for preparing an aluminum-plastic liquid cooling plate device, used for preparing the aluminum-plastic liquid cooling plate device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, combining the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover and performing nano-etching to open holes; S2, filling the opening with an ultrasonic dip coupling agent; S3, performing a composite curing treatment on the connection surfaces of the aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover assembly and the plastic plug by injection molding; S4, the plastic plug and the aluminum alloy reinforcement cover are riveted.

7. The method for preparing the aluminum-plastic liquid cooling plate device according to claim 6, characterized in that: The aluminum alloy harmonica tube plate and the aluminum alloy reinforcement cover in step S1 are combined by laser welding.

8. The method for preparing the aluminum-plastic liquid cooling plate device according to claim 6, characterized in that: In step S2, after the opening is filled with ultrasonic dip coupling agent, high-frequency hot pressing plastic film treatment is performed on both ends of the aluminum alloy harmonica tube plate.

9. The method for preparing the aluminum-plastic liquid cooling plate device according to claim 6, characterized in that: The plastic plugs in step S3 are injection molded at both ends of the aluminum alloy harmonica tube plate.

10. The method for preparing the aluminum-plastic liquid cooling plate device according to claim 6, characterized in that: In step S3, the outer surface of the plastic plug is subjected to plasma surface hydrophilic treatment.

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