Refrigerant direct cooling plate with adsorption type wick

Abstract

The utility model discloses a refrigerant direct cooling plate with an adsorption type wick, which comprises a plate body with a heat exchange flow channel, the wick positioned in the heat exchange flow channel and a metal thin frame which is also positioned in the heat exchange flow channel and is used for supporting and fixing the wick, one side of the plate body is an outer heat exchange surface, and the other side of the plate body is an inner heat exchange surface. The outer heat exchange surface is used for exchanging heat with the outside; the face, opposite to the outer heat exchange face, in the heat exchange runner is an inner heat exchange face, the inner heat exchange face is used for heat exchange between the plate body and a refrigerant, and meanwhile two inner side faces connected with the inner heat exchange face are further arranged in the heat exchange runner. And the liquid absorbing core is a three-dimensional netting piece with a plurality of micropores. The direct cooling plate is provided with the adsorption type wick, the wick is used for stably providing a refrigerant for the heat exchange side, and the heat exchange efficiency is better guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery temperature control, and in particular to a refrigerant direct cooling plate with an adsorption-type liquid wick. Background Art

[0002] With the global energy transition and rising environmental awareness, market demand for new energy vehicles, especially electric vehicles, is rapidly growing. In this context, batteries, as core components of electric vehicles, have a significant impact on overall vehicle performance and the user experience. Batteries generate significant heat during charging and discharging. If this heat cannot be effectively dissipated, it not only significantly shortens the battery's lifespan but can also lead to safety incidents such as thermal runaway. Therefore, designing an efficient battery thermal management system is crucial. This not only improves battery lifespan and performance but also impacts overall vehicle safety, as well as user trust and acceptance of new energy vehicles.

[0003] Currently, the widely used refrigerant direct cooling plates in the market dissipate heat from batteries based on the principle of convective heat transfer. This cooling method, which removes heat generated by the battery through the flow of refrigerant, is simple in design and low in cost, leading to its widespread adoption. However, with the increase in battery capacity and the advancement of fast charging technology, the heat dissipation capabilities of traditional direct cooling plates have gradually become insufficient. Under high load conditions, traditional direct cooling plates are prone to columnar air plugs and localized overheating due to poor temperature uniformity and low maximum heat dissipation power, resulting in reduced heat dissipation efficiency and difficulty meeting the demands of modern high-capacity batteries. These limitations not only affect battery performance but also adversely affect the continued efficient operation of the vehicle.

[0004] The main shortcoming of traditional direct cooling plates is that the flow path of the refrigerant is relatively fixed. When the battery is under high load, the refrigerant flow resistance increases and the local cooling efficiency decreases. In addition, the unstable flow of the refrigerant in the flow channel easily forms columnar air plugs, resulting in poor flow of the medium and significantly weakening the heat dissipation effect. Under high charging or discharging power conditions, the unevenness of the cooling medium is further exacerbated, forming local hot spots, affecting the stability and safety of the battery. These problems limit the application of traditional direct cooling plates under high-performance requirements, especially in high-temperature environments, where their heat transfer performance decreases more significantly, further limiting the performance of traditional cooling systems under complex working conditions. At the same time, the volatility of the refrigerant increases at high temperatures, further affecting the long-term stability of the system.

[0005] In addition, the structural design of traditional direct cooling plates has some limitations. Since it relies on the flow of refrigerant in the pipe for heat transfer, the stability of the refrigerant flow is crucial to the heat dissipation effect. In a complex working environment, the refrigerant flow is easily affected by external factors such as vibration or tilt, resulting in reduced heat dissipation efficiency. Although the manufacturing cost of traditional direct cooling plates is low, the cooling efficiency and reliability are difficult to meet the new energy vehicle industry's demand for efficient and reliable heat dissipation systems. In order to solve these problems, the industry has begun to explore various new cooling solutions, including liquid cooling plates, phase change material cooling, and the application of other new cooling media.

[0006] Therefore, it is particularly necessary to develop a new type of refrigerant direct cooling plate with low cost, high heat dissipation efficiency, easy use and easy production. Utility Model Content

[0007] The purpose of this application is to overcome at least one of the shortcomings of the prior art and to provide a refrigerant direct cooling plate with an adsorption-type liquid wick. The direct cooling plate has an adsorption-type liquid wick, which utilizes the liquid wick to stably provide refrigerant to the heat exchange side to better ensure heat exchange efficiency.

[0008] To achieve the above-mentioned purpose, the present application discloses a refrigerant direct cooling plate with an adsorption-type liquid-absorbing core, which direct cooling plate includes a plate body with a heat exchange flow channel, a liquid-absorbing core located in the heat exchange flow channel, and a metal thin frame also located in the heat exchange flow channel and used to support and fix the liquid-absorbing core, wherein one side of the plate body is an outer heat exchange surface, and the outer heat exchange surface is used to exchange heat with the outside world; the side opposite to the outer heat exchange surface in the heat exchange flow channel is an inner heat exchange surface, and the inner heat exchange surface is used to exchange heat between the plate body and the refrigerant. At the same time, two inner side surfaces connected to the inner heat exchange surface are also provided in the heat exchange flow channel; the liquid-absorbing core is a three-dimensional mesh with a plurality of micropores, and has a three-dimensional structure for forming micropores. The liquid-absorbing core is supported by the metal thin frame and pressed on the inner heat exchange surface, and a capillary liquid-absorbing gap with mutual interconnection and conduction is formed by utilizing the micropores of the three-dimensional mesh and the three-dimensional and inner heat exchange surfaces; a plurality of conduction holes are provided on the surface of the metal thin frame in contact with the liquid-absorbing core.

[0009] As an optional technical solution: the absorbent core is a three-dimensional mesh woven from fine metal wires.

[0010] As an optional technical solution, the liquid absorption core is in contact with at least two inner side surfaces, and forms a capillary liquid absorption gap with the inner side surfaces for transporting refrigerant to the inner heat exchange surface.

[0011] As an optional technical solution, the plate body includes a bottom plate provided with a groove and a panel for sealing an opening of the bottom plate.

[0012] As an optional technical solution, the cross-section of the heat exchange channel is trapezoidal or rectangular.

[0013] Compared with the prior art, this application has at least one of the following beneficial effects:

[0014] 1. Improve heat exchange efficiency: The design of the adsorption-type liquid absorption core can stably provide refrigerant, effectively increase the contact area between the refrigerant and the internal heat exchange surface, and improve the overall heat exchange efficiency.

[0015] 2. Avoid local overheating: The liquid absorption core is in close contact with the inner heat exchange surface and in contact with the inner side surface, which evenly distributes the refrigerant, reduces the formation of local hot spots, and ensures the uniformity of the cooling process.

[0016] 3. Enhance fluid stability: The support of the thin metal frame prevents the movement of the liquid wick, and the diversion holes help to evenly distribute the refrigerant in the flow channel, preventing air blockage and increased flow resistance.

[0017] 4. Simple structural design: The grooved bottom plate and the panel are sealed, which is easy to manufacture and assemble, suitable for large-scale production and reduces production costs.

[0018] 5. Strong adaptability: The various cross-sectional designs of the heat exchange flow channel (trapezoidal or rectangular) enhance the adaptability and flexibility of the direct cooling plate in different application scenarios.

[0019] The above-listed beneficial effects are not exhaustive and other potential beneficial effects and detailed technical implementations will be further disclosed in the examples or other description sections of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] After reading the following detailed description in conjunction with the accompanying drawings, you will better understand the various aspects of the present disclosure. The positions, sizes, and ranges of various structures shown in the drawings and the like sometimes do not represent the actual positions, sizes, and ranges. In the drawings:

[0021] Figure 1 It is a structural diagram of an embodiment disclosed in this application.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of an embodiment disclosed in this application.

[0023] Figure 3 It is a structural schematic diagram of a base plate in an embodiment disclosed in this application.

[0024] Figure 4 It is a schematic structural diagram of a thin metal frame in an embodiment disclosed in this application.

[0025] Figure 5 It is a schematic structural diagram of a liquid absorbent core in an embodiment disclosed in the present application.

[0026] Figure 6This is a partially enlarged view of a liquid-absorbing core in a preliminary draft example disclosed in this application. DETAILED DESCRIPTION

[0027] The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0028] It should be understood that like reference numerals refer to like elements throughout the drawings. In the drawings, the dimensions of some features may be distorted for clarity.

[0029] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, the techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered part of the authorization specification.

[0030] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Example

[0031] like Figure 1-6 As shown, this embodiment details a refrigerant direct cooling plate 1 with an integrated adsorption wick, which is designed to significantly improve heat exchange efficiency and refrigerant flow stability. The core structure of the direct cooling plate includes a plate body 1, a heat exchange channel 2, a wick 3, and a thin metal frame 4.

[0032] A heat exchange channel 2 is provided inside the plate body 1 , and a liquid absorbent core 3 and a thin metal frame 4 for supporting the liquid absorbent core 3 are installed in the heat exchange channel 2 .

[0033] The plate body 1 is designed so that one side is an external heat exchange surface for exchanging heat with the external environment, and the other side is an internal heat exchange surface for directly exchanging heat with the refrigerant.

[0034] The liquid wick 3 is pressed against the inner heat exchange surface by the support of the thin metal frame 4, and is in close contact with the inner heat exchange surface and the inner side surfaces on both sides of the heat exchange channel 2. This close contact can maximize the heat exchange area, promote the efficient flow of refrigerant in the channel and effectively conduct heat.

[0035] It should be understood that the primary goal of the plate 1 design is to optimize the heat conduction performance, so a metal material with high thermal conductivity, such as aluminum alloy or copper, is used to ensure efficient heat exchange between the refrigerant and the external environment.

[0036] The plate body 1 is composed of a bottom plate 101 with a groove and a panel 102 with a closed opening. Such a structure forms an internal heat exchange channel 2.

[0037] The cross-section of the heat exchange channel 2 can be designed as either a trapezoid or a rectangle. The trapezoidal cross-section effectively enhances the disturbance of the refrigerant flow, thereby improving the overall heat exchange effect. The base plate 101 and the face plate 102 are securely connected via welding, ensuring not only a tight seal and strength, but also high pressure and temperature fluctuation resistance, ensuring the stability of the refrigerant flow within the heat exchange channel 2 and preventing leakage.

[0038] It should be noted that the material selection of the plate body 1 not only takes into account thermal conductivity, but must also meet the requirements of mechanical strength and durability to adapt to various working conditions and ensure long-term stable and efficient heat dissipation performance.

[0039] In this embodiment, the wick 3 utilizes a three-dimensional mesh woven from fine metal wires, forming a three-dimensional (3D) mesh structure. This 3D mesh is composed of wires interwoven horizontally and vertically, with several stable contact points formed at the intersections, creating a complex mesh structure. These contact points provide the wick 3 with excellent structural stability, while the mesh holes formed between the wires create capillary channels, endowing the wick 3 with significant liquid absorption and transport capabilities. These capillary channels ensure that the refrigerant can effectively penetrate and distribute within the wick 3, achieving uniform refrigerant distribution. Through the fine three-dimensional mesh, the wick 3 can absorb the refrigerant and guide its flow, preventing stagnation or air locks in the flow path, thereby significantly improving heat exchange performance.

[0040] Specifically, the three-dimensional mesh is constructed by crisscrossing fine metal wires, and the intersections provide rigid support for the mesh structure, forming a three-dimensional flow channel for the refrigerant inside the wick 3. During the flow process, the refrigerant can enter the wick 3 through these mesh holes and be evenly transported to the inner heat exchange surface through the capillary gaps. The existence of the three-dimensional structure prolongs the flow path of the refrigerant in the wick 3, thereby increasing the contact time and contact area between the refrigerant and the inner heat exchange surface, greatly improving the overall heat exchange efficiency. By adjusting the density of the metal wire weaving, the optimal mesh structure can be designed according to the type of refrigerant and its flow requirements to obtain the best heat exchange effect. In addition, the three-dimensional mesh structure can also guide the flow direction of the refrigerant, so that the refrigerant forms a more complex flow pattern during the heat exchange process, thereby significantly improving the convective heat transfer effect.

[0041] It should be noted in particular that the mesh size and shape of the wick 3 have been carefully designed to achieve effective adsorption and retention of the refrigerant. These meshes not only provide an enhanced contact area at the location where the wick 3 is in direct contact with the inner heat exchange surface, but also form a capillary gap between the two. These capillary gaps, through the three-dimensional spatial structure of the three-dimensional mesh, enable the refrigerant to be continuously sucked from the heat exchange channel 2 through capillary action and evenly transported to the inner heat exchange surface for heat exchange. These meshes formed in the three-dimensional structure of the wick 3 can also significantly increase the turbulent effect, making the flow of the refrigerant in the heat exchange channel 2 more complex and efficient, thereby improving the overall heat exchange efficiency. The presence of capillary absorption gaps increases the flow path of the refrigerant, allowing it to penetrate into small areas of the heat exchange surface, prolonging the contact time between the refrigerant and the inner heat exchange surface, and thus more effectively achieving heat transfer.

[0042] In some embodiments, the wick 3 not only maintains close contact with the inner heat exchange surface, but also connects to the inner walls of both sides of the heat exchange channel 2, further enhancing the capillary absorption effect and ensuring that the refrigerant can be quickly and evenly distributed on the entire heat exchange surface. These capillary gaps formed between the wick 3 and the inner heat exchange surface can form a continuous liquid film, so that the refrigerant is evenly covered on the inner heat exchange surface, thereby achieving an efficient heat exchange effect. Because the three-dimensional mesh structure has strong capillary adsorption properties, the refrigerant can maintain a stable flow in the wick 3, avoiding the formation of air plugs in the heat exchange channel 2, thereby ensuring the stability and continuity of the heat exchange process. The refrigerant is evenly distributed through the capillary structure in the wick 3 and is in full contact with the inner heat exchange surface, effectively releasing heat and maximizing the utilization efficiency of the refrigerant. The complex geometric shape of the three-dimensional mesh can also introduce disturbances in the refrigerant flow process, breaking the boundary layer effect, thereby further improving the heat exchange effect.

[0043] In this embodiment, the design of the thin metal frame 4 not only provides physical support for the wick 3, but the guide holes set on its surface also ensure the free flow of refrigerant between the inside and outside of the wick 3, reducing fluid retention and improving the overall heat exchange efficiency. The thin metal frame 4 not only allows the wick 3 to be firmly attached to the inner heat exchange surface, but also increases the flow disturbance of the refrigerant through the guide holes, generating a turbulent effect, further improving the heat exchange performance of the refrigerant. The guide holes on the thin metal frame 4 help to break the stability of the refrigerant in the flow, causing the refrigerant to form turbulence in the process of passing through the wick 3 and the thin metal frame 4. The formation of turbulence mainly depends on the pressure difference and velocity changes generated by the refrigerant when passing through the guide holes. These rapid changes cause the refrigerant to mix with each other between different channels, forming irregular flow trajectories, thereby improving the contact efficiency between the refrigerant and the inner heat exchange surface.

[0044] It is also necessary to understand that the formation of turbulence increases the velocity gradient of the refrigerant, and the momentum and energy exchange between the fluid particles is significantly accelerated. This rapid and frequent mixing process makes the contact between the refrigerant and the internal heat exchange surface more complete, significantly improving the heat transfer efficiency. In addition, the introduction of turbulence can also effectively reduce the thickness of the boundary layer, increase the convective heat transfer coefficient of the refrigerant on the heat exchange surface, and further improve the overall heat transfer efficiency. In the heat exchange flow channel 2, the presence of turbulence makes the flow state of the refrigerant more complicated, avoiding the "cooling dead zone" under the laminar state, so that each part of the refrigerant can fully participate in the heat exchange process.

[0045] In summary, the combined design of the thin metal frame 4 and the wick 3 effectively promotes the formation of turbulent refrigerant flow through the guide holes, three-dimensional mesh structure, and their relative arrangement. The realization of this turbulent state enables the refrigerant in the heat exchange channel 2 to fully exchange heat with the internal heat exchange surface, greatly improving the heat exchange effect and ensuring the overall performance of the refrigerant direct cooling plate 1. The rational design of the thin metal frame 4 not only provides structural support, but also significantly improves the heat exchange efficiency of the refrigerant through a precise turbulence induction mechanism, ensuring the stable operation and efficient heat dissipation of the cooling system under various operating conditions.

[0046] Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing substantially from the spirit and scope of the present disclosure. Therefore, all such changes and modifications are intended to be within the scope of protection of the present disclosure as defined by the appended claims. The present disclosure is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A refrigerant direct cooling plate with an adsorption liquid wick, characterized in that: The direct cooling plate includes: a plate body with a heat exchange channel, a liquid absorbent core located in the heat exchange channel, and a metal thin frame also located in the heat exchange channel and used to support and fix the liquid absorbent core, wherein one side of the plate body is an external heat exchange surface, and the external heat exchange surface is used to exchange heat with the outside world; the side opposite to the external heat exchange surface in the heat exchange channel is an internal heat exchange surface, and the internal heat exchange surface is used to exchange heat between the plate body and the refrigerant. At the same time, two inner side surfaces connected to the inner heat exchange surface are also provided in the heat exchange channel; the liquid absorbent core is a three-dimensional mesh with a plurality of micropores, and has a three-dimensional structure for forming micropores. The liquid absorbent core is supported by the metal thin frame and pressed on the inner heat exchange surface, and a capillary liquid absorption gap with mutual interconnection and conduction is formed by utilizing the micropores of the three-dimensional mesh and the three-dimensional and inner heat exchange surfaces; a plurality of conduction holes are provided on the surface of the metal thin frame in contact with the liquid absorbent core.

2. A refrigerant direct cooling plate with an adsorption-type liquid wick as claimed in claim 1, characterized in that: The absorbent core is a three-dimensional mesh woven from fine metal wires.

3. A refrigerant direct cooling plate with an adsorption-type liquid wick as claimed in claim 1, characterized in that: The liquid absorption core is in contact with at least two inner side surfaces, and forms a capillary liquid absorption gap with the inner side surfaces for transporting refrigerant to the inner heat exchange surface.

4. A refrigerant direct cooling plate with an adsorption-type liquid wick as claimed in claim 1, characterized in that: The plate body comprises a bottom plate provided with a groove and a panel for sealing an opening of the bottom plate.

5. A refrigerant direct cooling plate with an adsorption-type liquid wick as claimed in claim 1, characterized in that: The cross section of the heat exchange channel is trapezoidal or rectangular.

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