CN-121985506-A - Micro-channel liquid cooling plate based on disordered ball packing and manufacturing method thereof

Abstract

The invention relates to a micro-channel liquid cooling plate based on disordered ball filling, which comprises a plate body with an inner cavity, wherein a plurality of regularly arranged blade teeth are arranged in the inner cavity of the plate body, a plurality of metal balls are filled in gaps between adjacent blade teeth, and the metal balls and the blade teeth are connected in a metallurgical bonding mode and form a disordered micro-channel network in the gaps. The three-dimensional random microchannel network with high specific surface area and strong disturbance is constructed by introducing and combining the metal ball fillers in disordered arrangement on the basis of the relieved tooth blade teeth, so that the heat exchange efficiency is remarkably improved, and meanwhile, the process is kept relatively simple and the cost is controllable.

Inventors

• GUO ZHENFENG
• GAO HEWEI
• LI QIWEI

Assignees

• 东莞市振亮精密科技有限公司

Dates

Publication Date

20260505

Application Date

20260204

Claims (10)

1. 1. The micro-channel liquid cooling plate based on disordered ball packing is characterized by comprising a plate body with an inner cavity, wherein a plurality of regularly arranged blade teeth are arranged in the inner cavity of the plate body, a plurality of metal balls are filled in gaps between adjacent blade teeth, and the metal balls and the blade teeth are connected in a metallurgical bonding mode and form a disordered micro-channel network in the gaps.
2. 2. The micro-channel liquid cooling plate based on disordered ball packing according to claim 1, wherein a liquid inlet and a liquid outlet which are communicated with the inner cavity are formed in the plate body, and cooling liquid is filled in the inner cavity.
3. 3. The micro-channel liquid cooling plate based on disordered ball packing according to claim 1 or 2, characterized in that the diameter of the metal balls is between 50 μm and 500 μm.
4. 4. A microchannel liquid cooled plate based on disordered ball packing in accordance with claim 3, wherein said metal balls have a diameter of 100 μm.
5. 5. The micro-channel liquid cooling plate based on disordered ball packing according to claim 1 or 2, wherein the metal balls and the blade teeth are made of the same material and are all made of aluminum, aluminum alloy, copper or copper alloy.
6. 6. The micro-channel liquid cooling plate based on disordered ball packing according to claim 1 or 2, wherein the metal balls are randomly stacked in the gap.
7. 7. The micro-channel liquid cooling plate based on disordered ball packing according to claim 2, wherein the plate body comprises a plate body, the blade teeth are arranged in an inner cavity of the plate body, a cover plate is connected to the top of the inner cavity in a sealing manner, and the liquid inlet and the liquid outlet are formed in the cover plate.
8. 8. The random ball filler-based microchannel liquid cooled panel of claim 7, wherein the lobes are machined in the interior cavity of the panel body by a relieved tooth process.
9. 9. A method of manufacturing a microchannel liquid cooled panel based on random ball packing according to any one of claims 1 to 8, comprising the steps of: s1, providing a plate body with an internal cavity; s2, machining a plurality of regularly arranged blade teeth in the cavity of the plate body through a relieved tooth process; s3, filling a plurality of metal balls into gaps between adjacent blade teeth; And S4, through a brazing or sintering process, the metal balls and the blade teeth are mutually and metallurgically combined to form an unordered micro-channel network.
10. 10. The method according to claim 9, wherein in the step S3, the metal balls are filled by free-falling filling or vibration filling; In step S4, the sintering process is liquid phase sintering.

Description

Micro-channel liquid cooling plate based on disordered ball packing and manufacturing method thereof Technical Field The application relates to the technical field of electronic equipment heat dissipation, in particular to a micro-channel liquid cooling plate based on disordered ball packing and a manufacturing method thereof. Background With the continuous improvement of the power density of electronic equipment, the liquid cooling heat dissipation technology becomes a mainstream scheme due to the advantages of high efficiency, silence and the like. The relieved tooth process is used as a mature metal forming technology, thin-wall blade teeth which are orderly arranged and have high depth-to-width ratio can be cut out from a substrate at one time, and a regular runner is formed, so that the method is a common method for manufacturing a liquid cooling plate. However, the traditional relieved tooth liquid cooling plate has regular runner shape and smooth surface, has limited disturbance on cooling liquid, has thicker heat exchange boundary layer and limits further improvement of heat dissipation performance. In order to enhance the turbulence, the prior art proposes various solutions, such as adding complex turbulence structures in the flow channels, or directly forming structures with complex three-dimensional micro-channels using metal additive manufacturing techniques. The former can add significant process complexity and cost, such as secondary processing of the turbulator columns, while the latter can have problems of high manufacturing cost, high print surface roughness, limited minimum feature size, generally difficulty in stably manufacturing channels with diameters less than 800 μm and clean interiors, and material properties that may be inferior to those of wrought or cast parts. Therefore, development of a microchannel liquid cooling plate and a method for manufacturing the same with high heat exchange efficiency, excellent reliability, low manufacturing cost and good process feasibility is needed. Disclosure of Invention In view of at least one of the above technical problems, the present application provides a microchannel liquid cooling plate based on a random ball packing. The invention also provides a manufacturing method of the micro-channel liquid cooling plate based on the disordered ball filler. The embodiment of the first aspect of the application provides a micro-channel liquid cooling plate based on disordered ball packing, which comprises a plate body with an inner cavity, wherein a plurality of regularly arranged blade teeth are arranged in the inner cavity of the plate body, a plurality of metal balls are filled in gaps between adjacent blade teeth, and the metal balls and the blade teeth are connected in a metallurgical bonding mode and form a disordered micro-channel network in the gaps. As a further improvement of the invention, the plate body is provided with a liquid inlet and a liquid outlet which are communicated with the internal cavity, and the internal cavity is filled with cooling liquid. As a further improvement of the invention, the diameter of the metal sphere is between 50 μm and 500 μm. As a further improvement of the present invention, the diameter of the metal sphere is 100 μm. As a further improvement of the invention, the metal balls and the blade teeth are made of the same materials and are all made of aluminum, aluminum alloy, copper or copper alloy. As a further improvement of the present invention, the metal balls are in a random packing state in the gap. As a further improvement of the invention, the plate body comprises a plate body, the blade teeth are arranged in the inner cavity of the plate body, the top of the inner cavity is connected with a cover plate in a sealing way, and the liquid inlet and the liquid outlet are arranged on the cover plate. As a further improvement of the invention, the blade teeth are formed in the inner cavity of the plate body by a relieved tooth process. The manufacturing method of the micro-channel liquid cooling plate based on disordered ball packing comprises the following steps: s1, providing a plate body with an internal cavity; s2, machining a plurality of regularly arranged blade teeth in the cavity of the plate body through a relieved tooth process; s3, filling a plurality of metal balls into gaps between adjacent blade teeth; And S4, through a brazing or sintering process, the metal balls and the blade teeth are mutually and metallurgically combined to form an unordered micro-channel network. As a further improvement of the present invention, in the step S3, the metal balls are filled by free falling filling or vibration filling; In step S4, the sintering process is liquid phase sintering. The embodiment of the application has the following technical effects that the design is reasonable and ingenious, and the three-dimensional random micro-channel network with high specific surface area and strong disturbance is con