Light durable liquid cooling plate based on aluminum foil material

Abstract

The utility model discloses a light durable liquid cooling plate based on an aluminum foil material. The light durable liquid cooling plate comprises the steps of material sheet preparation, flow channel cold stamping forming, folding and sealing and the like. The liquid cooling plate is made of a three-layer composite material composed of polypropylene (PP), aluminum foil and nylon, and compared with a traditional pure metal liquid cooling plate, the liquid cooling plate has the advantages of being soft in attachment, good in surface deformation and free of being coated with heat dissipation glue, and the heat dissipation effect is remarkably optimized. The PP layer is resistant to bacteria and corrosion, so that the service life of the liquid cooling plate is prolonged to 10-15 years, and the problems that a traditional metal plate is prone to corrosion, liquid leakage and biological growth are solved. The design is light in weight, low in cost, particularly suitable for mobile electronic equipment such as aircrafts and electric automobiles, high in automation degree of the production process and suitable for batch manufacturing. Due to the ductility and convenient sealing characteristic of the composite material, the liquid cooling plate is more stable in structure and reliable in packaging, and the modern requirements for high efficiency, light weight, durability and heat dissipation are fully met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic appliances, lithium battery heat management technical field especially, it is a kind of light durable liquid cooling plate based on aluminium foil material. BACKGROUND

[0002] Liquid cooling technology is through liquid flow to take away heat, realizes the high efficiency heat dissipation of high heat density electronic equipment, is widely used in data center server, power battery, aircraft and electric vehicle and the scene needing high efficiency heat dissipation.Liquid cooling plate as the core component of liquid cooling system, usually adopts metal material (such as copper, aluminium) to manufacture, its structure is internal flow passage design, liquid absorbs heat and discharges through flow passage, realizes heat dissipation effect.However, traditional metal liquid cooling plate has many problems in practical application, for example:

[0003] 1, metal liquid cooling plate is susceptible to electrochemical corrosion in long-term use, causes flow passage inner wall corrosion, flow resistance change, leakage and other problems, can even cause biological growth, seriously affect the normal operation and service life of equipment.In order to deal with corrosion problem, it is often necessary to frequently replace liquid cooling plate or regularly clean, replace coolant, usually needs to be maintained once every 3-5 years, not only increases maintenance cost, but also affects the continuous operation of equipment.

[0004] 2, the rigid structure of metal liquid cooling plate makes it difficult to adhere to the surface of the cooled object, usually needs to apply thermal conductive glue to carry out thermal interface connection, but the thermal resistance of thermal conductive glue increases the thermal resistance of overall heat dissipation path, affects heat dissipation efficiency.At the same time, the weight of metal material itself is relatively large, is not suitable for mobile electronic equipment and small-sized heat dissipation demand, such as aircraft and electric vehicle, which limits the application scene of liquid cooling plate.

[0005] In order to solve the above problems, the prior art attempts to improve metal material or surface coating to improve corrosion resistance, but such improvement is often high in cost and limited in effect.Other attempts include optimizing welding process to improve flow passage sealing performance, but the process is complex and low in automation, difficult to realize large-scale production.

[0006] Therefore, how to provide a liquid cooling plate design with good adhesion, corrosion resistance, light weight and suitable for automatic production has become a technical problem to be solved by the utility model. UTILITY MODEL CONTENT

[0007] The technical problem solved by the utility model is to provide a light durable liquid cooling plate based on aluminium foil material to solve the problems of existing liquid cooling plate, such as easy corrosion, low heat dissipation efficiency, heavy weight and high manufacturing cost, in view of the defects in the prior art.

[0008] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0009] A light and durable liquid cooling plate based on aluminum foil material, comprising an aluminum foil material body, the aluminum foil material body comprising a first aluminum foil material sheet and a second aluminum foil material sheet;

[0010] A flow channel groove is arranged on the first aluminum foil material sheet and / or the second aluminum foil material sheet;

[0011] The first aluminum foil material sheet and the second aluminum foil material sheet are hot-pressed into an integrated structure, so that the flow channel groove forms a flow channel hole;

[0012] The flow channel hole comprises a hole one end and a hole other end;

[0013] The hole one end and the hole other end of the flow channel hole are respectively sealingly connected with a pipe joint, or a pipe body matched with the flow channel hole is embedded in the flow channel hole, and the two ends of the pipe body form pipe joints at the hole one end and the hole other end of the flow channel hole.

[0014] As a further scheme of the present application, the first aluminum foil material sheet and the second aluminum foil material sheet of the aluminum foil material body are respectively composed of a three-layer composite structure, which comprises an inner layer polypropylene, an intermediate layer aluminum foil and an outer layer nylon layer in sequence. As a further scheme of the present application, the flow channel groove is formed by a cold stamping process, the cold stamping process uses a forming die to extrude a predetermined flow channel shape on the first aluminum foil material sheet and / or the second aluminum foil material sheet, and the flow channel shape can be M-shaped, S-shaped, Z-shaped or serpentine-shaped to adapt to different cooling requirements.

[0015] As a further scheme of the present application, the pipe joint is a pagoda mouth structure, the bottom of the pagoda mouth is provided with a skirt, the skirt is hot-sealingly connected with the hole one end and the hole other end of the flow channel hole, and a plurality of annular protrusions are arranged on the pagoda mouth body to increase the packaging strength and sealing performance between the pipe joint and the aluminum foil material body.

[0016] As a further scheme of the present application, the overall structure of the aluminum foil material body provides a heat conduction path by the aluminum foil layer, and the outer layer nylon layer and the inner layer polypropylene layer cover the aluminum foil layer to form a composite material with good flexibility and sealing performance.

[0017] As a further scheme of the present application, the aluminum foil material body is manufactured in batches by a cold stamping, folding and heat sealing process.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. Compared to existing liquid cooling plates made of metal, the liquid cooling plate of this invention uses aluminum foil, which is flexible and has excellent surface deformation capabilities, allowing it to fit tightly against the device being cooled without the need for thermal adhesive. This fit significantly reduces interfacial thermal resistance compared to traditional pure metal liquid cooling plates, improving overall heat dissipation and resulting in higher and more stable heat dissipation efficiency.

[0020] 2. Traditional metal liquid cooling plates are susceptible to electrolytic corrosion, and after prolonged use, problems such as corrosion, leakage, changes in flow resistance, and biological growth may occur. They typically need to be replaced every 3-5 years, accompanied by a cumbersome cleaning process. The polypropylene (PP) layer in this invention has antibacterial and corrosion-resistant properties, significantly extending its service life to 10-15 years, effectively avoiding frequent maintenance and replacement, and significantly improving ease of use and reliability.

[0021] 3. The composite material design of this invention significantly reduces the overall weight, making it particularly suitable for mobile electronic products such as power batteries, aircraft, and electric vehicles, as well as for micro-heat dissipation applications. The lightweight material not only reduces the load on the device but also improves the battery life and performance of mobile devices.

[0022] 4. This invention simplifies the production process of liquid-cooled plates. Through processes such as cold stamping, folding, and heat sealing, it achieves a high degree of automation, eliminating the need for complex metal welding and laser welding, thus significantly reducing manufacturing costs. Furthermore, these automated processes facilitate mass production, further improving production efficiency and product consistency.

[0023] 5. The nylon layer in this composite material exhibits excellent ductility, while the polypropylene (PP) layer demonstrates good sealing performance during the sealing process, ensuring the overall sealing and strength of the flow channel. This material combination not only enhances the overall structural performance of the liquid cooling plate but also makes the sealing process more convenient and reliable.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 It is the perspective view of the flow channel concave hole of the utility model.

[0028] Figure 3 It is the schematic view when the utility model adopts the pipe body and the pipe joint structure.

[0029] The reference signs and names in the drawing are as follows:

[0030] The aluminum foil material body 1, the first aluminum foil material sheet 2, the second aluminum foil material sheet 3, the flow channel groove 4, the flow channel concave hole 5, the hole one end 6, the hole other end 7, the pipe joint 8 and the pipe body 9. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0032] Please refer to Figure 1 -2, in the embodiments of the utility model, a light and durable liquid cooling plate based on aluminum foil material includes aluminum foil material body 1, the aluminum foil material body 1 includes first aluminum foil material sheet 2 and second aluminum foil material sheet 3;First aluminum foil material sheet 2 and / or second aluminum foil material sheet 3 are provided with flow channel groove 4;First aluminum foil material sheet 2 and second aluminum foil material sheet 3 are hot-pressed into an integrated structure, so that flow channel groove 4 forms flow channel concave hole 5;Flow channel concave hole 5 includes hole one end 6 and hole other end 7, and the hole one end 6 and the hole other end 7 of flow channel concave hole 5 are respectively sealed and connected with pipe joint, so as to connect the inlet and outlet of cooling liquid, all belong to the extension implementation mode that the ordinary skill in the art can know, and the pipe body 9 with certain hardness matched with flow channel concave hole 5 can be embedded in flow channel concave hole 5, so as to make flow channel concave hole not easy to deform, at this time, the two ends of pipe body 9 can be used as joint parts for pipe connection or respectively connected with pipe joint 8 to facilitate connection, all belong to the extension implementation mode that the ordinary skill in the art can know;First aluminum foil material sheet 2 and second aluminum foil material sheet 3 of aluminum foil material body 1 are respectively composed of three-layer composite structure, including inner layer polypropylene (PP), intermediate layer aluminum foil and outer layer nylon layer in turn;Polypropylene layer has good sealing performance, aluminum foil layer provides heat conduction function, and nylon layer has ductility.

[0033] The flow channel groove 4 is formed by a cold stamping process that extrudes a predetermined flow channel shape on the first aluminum foil material sheet 2 and / or the second aluminum foil material sheet 3 using a forming die, which can be M-shaped, S-shaped, Z-shaped, or serpentine-shaped to accommodate different cooling requirements. The pipe joint is a spout structure with a skirt at the bottom, which is heat-sealed to the one end 6 and the other end 7 of the flow channel groove 5, and multiple annular protrusions on the spout body to increase the packaging strength and sealing performance between the pipe joint and the aluminum foil material body 1. The overall structure of the aluminum foil material body 1 provides a heat conduction path with an aluminum foil layer, and the outer nylon layer and inner polypropylene layer cover the aluminum foil layer to form a composite material with good flexibility and sealing performance. The aluminum foil material body 1 is mass-produced by cold stamping, folding, and heat sealing processes, which do not involve welding, are suitable for efficient automated production, and can manufacture liquid cooling plates of various specifications and sizes to meet the cooling needs of different equipment.

[0034] A manufacturing process for a lightweight and durable liquid cooling plate based on aluminum foil material, comprising the following steps:

[0035] Step 1: Material sheet preparation: aluminum-plastic film material is prepared by a composite process;

[0036] Step 2: Cold stamping flow channel: the material sheet is processed into a predetermined flow channel shape using a cold stamping process;

[0037] Step 3: Fold and seal: fold the formed material sheet and seal the flow channel by heating and sealing process, while reserving the inlet and outlet of the cooling liquid.

[0038] Step 1 of material sheet preparation includes laminating multiple layers of materials with different functions to form a whole composite material, specifically including:

[0039] S1: Apply glue to the polypropylene (PP) layer, the intermediate aluminum foil layer, and the nylon layer in sequence;

[0040] S2: Stack the glued layers of materials in sequence by lamination process;

[0041] S3: Under the conditions of applying pressure and temperature, press the layers of materials into a whole material sheet;

[0042] S4: Cut and shape the material sheet to meet the predetermined size requirements.

[0043] The cold stamping forming runner process in step 2 includes stamping using a fixed mold and a bottom mold, the shapes of which are designed according to cooling requirements, so that the runner groove 4 has accurate size and shape to ensure that the fluid passage of the runner is consistent and the heat dissipation effect is optimal. The heating sealing process in step 3 adopts a multi-stage heat sealing method, including preheating, hot pressing and cooling stages, by controlling the sealing temperature, pressure and time to ensure the sealing strength and durability of the sealing part and effectively prevent the leakage of the cooling liquid.

[0044] Embodiment 1:

[0045] In the power battery cooling system, in order to ensure that the battery pack maintains stable working temperature when high power output, the traditional metal liquid cooling plate is usually used for thermal management. However, the traditional metal liquid cooling plate is easily subject to electrochemical corrosion during long-term use, and the inner wall of the runner is gradually corroded, leading to liquid leakage, flow resistance change, and even causing mold and biological growth. In addition, the metal liquid cooling plate is rigid and cannot be closely attached to the surface of the battery module, so it needs to be coated with thermal conductive glue for thermal interface connection, which increases the thermal resistance and reduces the overall heat dissipation effect. At the same time, due to the relatively large weight of the metal material, these liquid cooling plates are not suitable for mobile devices such as electric vehicles and aircrafts with strict lightweight requirements, limiting their application.

[0046] In order to solve the above problems, the embodiment adopts a lightweight and durable liquid cooling plate based on aluminum foil material, and applies it to the power battery cooling system of electric vehicles. The liquid cooling plate is composed of three layers of composite materials, including a polypropylene (PP) layer, an intermediate aluminum foil layer and an outer nylon layer, a runner is formed by cold stamping process, and an integrated runner recess 5 structure is formed by folding and heat sealing, which meets the cooling requirements of the power battery module.

[0047] In actual application, the liquid cooling plate is arranged between the battery module of the electric vehicle and connected with the cooling liquid circulation system through the reserved cooling liquid inlet and outlet. The cooling liquid flows through the runner recess 5 in the liquid cooling plate during circulation, quickly absorbs the heat released by the battery module and carries it away, achieving efficient heat dissipation. Since the liquid cooling plate of the utility model adopts composite material, the overall structure is relatively soft and can be closely attached to the surface of the battery module, and no thermal conductive glue is needed during the attachment process, which greatly reduces the thermal resistance of the thermal interface and significantly improves the heat dissipation efficiency.

[0048] Through the corrosion resistance of the polypropylene layer, the liquid cooling plate will not produce corrosion phenomenon under the long-term circulation of the cooling liquid, avoiding the leakage and flow resistance change problems caused by electrochemical corrosion of the traditional metal liquid cooling plate. In addition, the ductility of the nylon layer ensures that the liquid cooling plate can still maintain sealing performance under dynamic thermal expansion and contraction conditions, and will not affect the normal work of the runner due to deformation. The service life is prolonged from 3-5 years to 10-15 years compared with the traditional metal liquid cooling plate, reducing the maintenance frequency and replacement cost.

[0049] It is worth noting that the lightweight characteristics of the composite material significantly reduce the overall weight of the liquid cooling plate, reducing the weight by about 30%-50% compared to traditional metal liquid cooling plates, which is particularly important for electric vehicles that need to control the weight of the vehicle body. This lightweight design not only helps to improve the vehicle's range, but also significantly improves the vehicle's power performance. In addition, the manufacturing process of the liquid cooling plate has a high degree of automation, combining cold stamping, folding and heat sealing processes to achieve efficient mass production, significantly reducing production costs.

[0050] The application of this embodiment demonstrates the significant technical progress of the liquid cooling plate based on aluminum foil material in the actual power battery cooling scene: not only improves the cooling effect and system reliability, but also shows unique advantages in lightweight and low-cost manufacturing, solving multiple key pain points in the prior art. Through this technical solution, the thermal management level of mobile electronic devices such as electric vehicles has been greatly improved, effectively extending the service life of the battery pack and the overall system.

[0051] Embodiment 2:

[0052] In the heat dissipation management of data center servers, with the continuous growth of computing power, the power density of a single cabinet has significantly increased, and traditional air cooling has been unable to meet the needs of high heat density environments. Liquid cooling technology has become a key means to solve this problem, but the commonly used copper or aluminum liquid cooling plates have various problems in use, such as corrosion, high cost, heavy weight, and are not suitable for installation and maintenance in complex spaces inside the server.

[0053] This embodiment provides a liquid cooling plate based on aluminum foil material and applies it to a server memory bar liquid cooling module. The liquid cooling plate is composed of three layers of composite structure, including inner layer polypropylene (PP), middle layer aluminum foil and outer layer nylon, and is processed into a liquid cooling plate with a specific flow channel shape through cold stamping forming technology. The formed liquid cooling plate is folded and sealed by heating to form an integrated closed flow channel structure, and the flow channel inlet and outlet are connected with the spout for matching with the liquid cooling system of the server.

[0054] In the actual application of the server memory bar, the liquid cooling plate is installed on the heat source area of the memory bar through the bracket, and the cooling liquid enters the flow channel through the spout and circulates along the flow channel on the surface of the memory bar. Since the composite material liquid cooling plate is softer and has better surface deformation ability than the traditional metal liquid cooling plate, the liquid cooling plate can tightly adhere to the surface of the memory bar to achieve efficient heat exchange. In contrast, the traditional metal liquid cooling plate needs to be coated with additional heat dissipation glue to ensure thermal interface bonding, while the liquid cooling plate in this embodiment does not need to use heat dissipation glue, simplifying the installation process and improving the heat dissipation efficiency.

[0055] The corrosion resistance of the inner layer PP enables the liquid cooling plate to effectively resist corrosion and microbial growth of the cooling liquid during long-term use, significantly extending the service life and avoiding the frequent replacement of the cooling liquid and cleaning of the flow channel of the traditional metal liquid cooling plate. At the same time, the ductility of the outer layer nylon material ensures that the liquid cooling plate can maintain good sealing and structural stability under various temperatures and mechanical stresses.

[0056] Through this embodiment, the composite liquid cooling plate not only reduces the overall weight of the server heat dissipation module and improves the installation convenience, but also significantly reduces the manufacturing and maintenance costs of the heat dissipation module. In addition, the cold stamping and heat sealing process of the liquid cooling plate is highly adaptable to automated production and can achieve large-scale and high-consistency manufacturing, which is particularly important in data center construction and expansion.

[0057] This embodiment proves that the liquid cooling plate based on aluminum foil material can significantly improve the cooling efficiency and reduce the equipment maintenance frequency in the data center server heat dissipation management, and has the advantages of light weight, flexibility, durability, etc. in the manufacturing and application process, providing a more efficient and stable heat dissipation solution for high-density computing devices such as servers.

[0058] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connecting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specified, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art.

[0059] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A light and durable liquid cooling plate based on aluminum foil material, characterized in that: comprising an aluminum foil material body, the aluminum foil material body comprising a first aluminum foil material sheet and a second aluminum foil material sheet; a flow channel groove is arranged on the first aluminum foil material sheet and / or the second aluminum foil material sheet; the first aluminum foil material sheet and the second aluminum foil material sheet are hot-pressed into an integrated structure, so that the flow channel groove forms a flow channel hole; the flow channel hole comprises a hole one end and a hole other end; the hole one end and the hole other end of the flow channel hole are respectively sealed and connected with pipe joints, or a pipe body matched with the flow channel hole is embedded in the flow channel hole, and the two ends of the pipe body form pipe joints at the hole one end and the hole other end of the flow channel hole, respectively.

2. The lightweight and durable liquid cooling plate based on aluminum foil material according to claim 1, characterized in that, the first aluminum foil material sheet and the second aluminum foil material sheet of the aluminum foil material body are respectively composed of a three-layer composite structure, which comprises an inner layer of polypropylene, an intermediate layer of aluminum foil, and an outer layer of nylon.

3. The lightweight and durable liquid cold plate based on aluminum foil material according to claim 1, characterized in that, the flow channel groove is formed by a cold stamping process, which uses a forming die to extrude a predetermined flow channel shape on the first aluminum foil material sheet and / or the second aluminum foil material sheet, and the flow channel shape can be M-shaped, S-shaped, Z-shaped or serpentine-shaped to adapt to different cooling requirements.

4. The lightweight and durable liquid cold plate based on aluminum foil material according to claim 1, characterized in that, the pipe joint is a pagoda mouth structure, the bottom of the pagoda mouth is provided with a skirt, the skirt is hot-sealed and joined with the hole one end and the hole other end of the flow channel hole, and a plurality of annular protrusions are arranged on the pagoda mouth body to increase the packaging strength and sealing performance between the pipe joint and the aluminum foil material body.

5. The lightweight and durable liquid cold plate based on aluminum foil material according to claim 1, characterized in that, the overall structure of the aluminum foil material body provides a heat conduction path by the aluminum foil layer, and the outer nylon layer and the inner polypropylene layer cover the aluminum foil layer to form a composite material with good flexibility and sealing performance.

6. The lightweight and durable liquid cold plate based on aluminum foil material according to claim 1, characterized in that, the aluminum foil material body is mass-produced by cold stamping, folding and heat sealing processes.

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