Energy storage liquid cooling plate and preparation method thereof

Abstract

The invention relates to the technical field of liquid cooling plates, in particular to an energy storage liquid cooling plate and a preparation method thereof. The liquid cooling plate comprises a liquid cooling plate body, a liquid inlet, a liquid outlet and an end plate, the liquid cooling plate body is manufactured through integrated extrusion, and the liquid cooling plate body comprises fin plates, heat collection strips, flow channels, wing plates and assembly holes; flow guide air holes are formed in the fin plates; and the heat collecting strips are positioned on the upper plate surface and / or the lower plate surface of the liquid cooling plate body. According to the liquid cooling plate, the flow guide air holes, the heat collection strips and the wing plates are arranged on the fin plates of the liquid cooling plate, so that the heat dissipation condition is excellent, the heat dissipation effect is improved, and heat dissipation is more uniform; the multi-cavity flow channel design can ensure the liquid flow rate and uniform heat dissipation; the liquid cooling plate main body is manufactured through integrated extrusion, the manufacturing is simple, the manufacturing efficiency is high, and the structural strength of the liquid cooling plate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling plates, and in particular to an energy storage liquid cooling plate and a preparation method thereof. Background Art

[0002] With the rapid development of new energy and renewable and recyclable energy, energy storage technology and energy storage equipment have become an important part of achieving efficient use of energy. In the use of energy storage technology and equipment, the cooling system is an important component. In the continuous development and research of energy storage technology and equipment, related equipment has higher and higher requirements for the cooling capacity of the cooling system. Liquid cooling plates have become an important component of energy storage cooling systems due to their stable cooling capacity and have been applied to different scenarios in the field of energy storage. Therefore, the heat dissipation capacity of liquid cooling plates directly affects the development of the energy storage field.

[0003] In the existing technical solutions, liquid cooling plates are mostly plate-type structures, and the heat dissipation methods are heat conduction, heat radiation, and heat convection. The materials are aluminum and copper. Because aluminum and copper have high heat dissipation capacity, good processing technology, and high cost performance, they are widely used in cooling systems. At present, the main manufacturing methods of liquid cooling plates include: buried pipe process, profile + welding, machining + welding, die casting + welding, stamping + welding. The heat dissipation method mainly uses the flow of liquid to carry away the heat. The heat dissipation capacity of the parts themselves is relatively poor, the heat dissipation area is small, the heat dissipation method is single, and the heat dissipation efficiency is low.

[0004] In summary, it is urgent to solve the problems existing in the prior art that the single liquid cooling method of the liquid cooling plate has low heat dissipation efficiency; the existing liquid cooling plate with fins has a complex manufacturing process and low manufacturing efficiency. The heat dissipation efficiency is low and the strength is low; the liquid cooling plate using the refrigerant cavity and fins for heat dissipation has unstable flow in the refrigerant cavity, uneven heat dissipation, and poor heat dissipation effect of the fins. Summary of the invention

[0005] The present invention aims to solve the technical problems of complex manufacturing, low efficiency, poor heat dissipation, uneven heat dissipation and unstable liquid flow of a liquid cooling plate with fins.

[0006] In order to achieve the above-mentioned object, the first aspect of the present invention provides an energy storage liquid cooling plate, wherein the liquid cooling plate comprises: a liquid cooling plate body, a liquid inlet, a liquid outlet and an end plate;

[0007] Wherein, the liquid cooling plate body is made by integrated extrusion, and the liquid cooling plate body comprises: a fin plate, a heat collecting strip, a flow channel, a wing plate and an assembly hole;

[0008] Wherein, the fin plate is provided with guide air holes;

[0009] Wherein, the heat collecting strips are located on the upper plate surface and / or the lower plate surface of the liquid cooling plate body.

[0010] The second aspect of the present invention provides a method for preparing the above-mentioned energy storage liquid cooling plate, wherein the preparation method comprises: extrusion of the liquid cooling plate body; cutting of raw materials; parts processing; pretreatment; assembly welding; post-welding CNC and laser cutting finishing; cleaning; testing; surface treatment; laser coding; packaging;

[0011] The conditions for extrusion of the liquid cooling plate body include: mold heating temperature of 490-510°C, extrusion barrel temperature of 420-460°C, ingot temperature of 500-520°C, extrusion coefficient of 15-40, and extrusion speed of 3-6m / min;

[0012] The guide air holes are processed by laser drilling, and the processing conditions include a cutting speed of 1.0-16.0 m / min and a laser power of 1.5 kW-8.0 kW.

[0013] The beneficial effects of the present invention are:

[0014] (1) The fin plate of the liquid cooling plate is provided with guide holes, heat collecting strips and wing plates, so that the heat dissipation conditions are excellent, the heat dissipation effect is improved, and the heat dissipation is more uniform;

[0015] (2) The multi-cavity flow channel design of the liquid cooling plate can ensure the liquid flow rate and heat dissipation are uniform;

[0016] (3) The main body of the liquid cooling plate is made by integrated extrusion, which is simple to manufacture, has high manufacturing efficiency, and has high structural strength of the liquid cooling plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the energy storage liquid cooling plate;

[0018] Figure 2 This is the end view of the energy storage liquid cooling plate;

[0019] Figure 3 It is a side view of the energy storage liquid cooling plate;

[0020] Figure 4 It is a top view of the energy storage liquid cooling plate;

[0021] Figure 5 is a schematic diagram of the main body of the liquid cooling plate;

[0022] Figure 6 is a cross-sectional view of the main body of the liquid cooling plate;

[0023] Figure 7 FIG. 4 is a top view of the main body of the liquid cooling plate.

[0024] 1 liquid cooling plate body; 2 liquid inlet; 3 liquid outlet; 4 end plate; 11 fin plate; 12 flow guide hole; 13 assembly hole 14 flow channel; 15 heat collecting strip; 16 wing plate; 111 plate fin; 112 web plate. DETAILED DESCRIPTION

[0025] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0026] The prior art uses a liquid cooling plate with fins to improve heat dissipation efficiency, but the heat dissipation is uneven and the strength of the liquid cooling plate is low.

[0027] In the present invention, the inventors have found that if the structure of the liquid cooling plate is optimized, the strength of the liquid cooling plate can be ensured when a fin plate is used, while the heat dissipation efficiency can be improved and the heat dissipation can be more uniform.

[0028] To achieve this goal, the inventors tried to optimize the liquid cooling plate structure, and the inventors found that the above-mentioned purpose can be achieved through a specific liquid cooling plate structure.

[0029] To this end, the first aspect of the present invention provides an energy storage liquid cooling plate, wherein the liquid cooling plate comprises: a liquid cooling plate body, a liquid inlet, a liquid outlet and an end plate;

[0030] Wherein, the liquid cooling plate body is made by integrated extrusion, and the liquid cooling plate body comprises: a fin plate, a heat collecting strip, a flow channel, a wing plate and an assembly hole;

[0031] Wherein, the fin plate is provided with guide air holes;

[0032] Wherein, the heat collecting strips are located on the upper plate surface and / or the lower plate surface of the liquid cooling plate body.

[0033] In the present invention, the inventors found that the guide air holes in the specific liquid cooling plate structure provided by the present invention can improve the air flow efficiency, improve the heat convection capacity, and increase the heat dissipation without reducing the strength of the liquid cooling plate.

[0034] In the present invention, the arrangement, quantity and shape of the guide air holes can be adjusted according to design requirements.

[0035] Preferably, the guide air holes are circular and arranged in parallel order.

[0036] In the present invention, the heat collecting strip is a part of the liquid cooling plate body and can be on the upper plate surface, the lower plate surface, or both. The position of the heat collecting strip can be adjusted and the heat collecting strip is used to collect heat in the flow channel to enhance heat dissipation and balance temperature differences.

[0037] In the present invention, the liquid cooling plate body is an aluminum alloy extruded profile, the profile has a liquid flow channel inside for cooling liquid flow to dissipate heat, and the surface is provided with fins for air cooling and heat dissipation.

[0038] In the present invention, the cooling liquid enters the liquid cooling plate through the liquid inlet; the cooling liquid enters the liquid cooling device through the liquid outlet after circulating through the liquid cooling plate; the end plate is used to connect with the liquid cooling plate body to seal the liquid cooling plate; the assembly hole is used for assembling the liquid cooling plate.

[0039] According to the present invention, the end plate, the liquid inlet and the liquid outlet are assembled with the liquid cooling plate body by plugging and then assembled and welded by laser wire-filling welding.

[0040] According to the present invention, the flow channel is located on the liquid cooling plate body, and the fin plate is located on the upper plate surface or the lower plate surface of the liquid cooling plate body.

[0041] According to the present invention, the fin plate is composed of a plate fin and a web, the web is located on the liquid cooling plate body, and the plate fin is located above the web and is perpendicular to the web.

[0042] In the present invention, the arrangement, angle with the horizontal direction, quantity and shape of the fins can be adjusted according to design requirements.

[0043] Preferably, the fins are arranged in parallel order, horizontally placed at an angle of 0° to the horizontal direction, and in a rectangular shape.

[0044] In the present invention, the fin plate is composed of a web and a plate fin. The heat dissipation efficiency can be improved by the composition of the plate fin. The plate fins are arranged side by side, and the arrangement order of the plate fins can be staggered. The arrangement order, shape and quantity can be adjusted according to design requirements.

[0045] According to the present invention, the wing plates are located on both sides of the liquid cooling plate body.

[0046] According to the present invention, the flow channel is a multi-cavity flow channel.

[0047] The second aspect of the present invention provides a method for preparing the above-mentioned energy storage liquid cooling plate, wherein the preparation method comprises: extrusion of the liquid cooling plate body; cutting of raw materials; parts processing; pretreatment; assembly welding; post-welding CNC and laser cutting finishing; cleaning; testing; surface treatment; laser coding; packaging;

[0048] The conditions for extrusion of the liquid cooling plate body include: mold heating temperature of 490-510°C, extrusion barrel temperature of 420-460°C, ingot temperature of 500-520°C, extrusion coefficient of 15-40, and extrusion speed of 3-6m / min;

[0049] The guide air holes are processed by laser drilling, and the processing conditions include a cutting speed of 1.0-16.0 m / min and a laser power of 1.5 kW-8.0 kW.

[0050] In the present invention, a specific preparation method is adopted so that a liquid cooling plate body with a complex structure can be manufactured by integrated extrusion, and flow guide holes can be provided on the liquid cooling plate with fins.

[0051] According to the present invention, the parts processing includes CNC processing, milling forming and laser cutting of the parts.

[0052] According to the present invention, the pretreatment is to mechanically polish and clean the surface of the parts to remove the surface oxide film and dirt.

[0053] According to the present invention, the assembly welding adopts laser wire welding.

[0054] According to the present invention, the detection is airtightness detection, online dimension detection and insulation detection.

[0055] According to the present invention, the surface treatment adopts acid-base cleaning, anodizing, electrophoresis and passivation.

[0056] The technical scheme of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described herein are only some embodiments of the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments implemented by ordinary technicians in this field without making creative improvements belong to the protection scope of the present invention.

[0057] Embodiment 1:

[0058] The manufacturing process is as follows:

[0059] S1: Liquid-cooled plate body extrusion: Profile extrusion is performed by a press, with a die heating temperature of 500°C, an extrusion barrel temperature of 440°C, an ingot temperature of 510°C, an extrusion coefficient of 15, and an extrusion speed of 4.5 m / min;

[0060] S2: Raw material cutting: Cut the extruded profiles and plates to make raw materials suitable for liquid cooling plate processing;

[0061] S3: Parts processing: CNC machining of raw materials, milling into parts that meet the requirements, including body welding structure processing, end plate processing, inlet and outlet processing, body inlet and outlet hole processing;

[0062] The dimensions of the liquid cooling plate are 1100mm wide, 1200mm long, 3mm thick, 70mm wide and 20mm high, with 12 channels, 3 plate fins, 35mm wide, 10mm spacing between top and bottom, 60mm high web, 3mm wide and 5mm high heat collecting strips.

[0063] S4: Pretreatment: Mechanically polish and clean the parts to remove surface oxide film, dirt and other impurities;

[0064] S5: Assembly welding: After the assembly is completed, laser wire welding is used to assemble and weld each component;

[0065] S6: Post-weld CNC finishing: Use CNC machine tools, laser drilling equipment and other high-precision processing equipment to finish parts, weld finishing, guide hole processing, assembly hole processing;

[0066] The processing of the guide holes was carried out by laser drilling, and the process parameters included a cutting speed of 8 m / min and a laser power of 6.0 kW;

[0067] S7: Cleaning: Clean the product and remove aluminum chips, oil stains and other debris;

[0068] S8: Online size detection: perform size detection on the energy storage liquid cooling plate;

[0069] S9: Air tightness test: Perform helium test on the energy storage liquid cooling plate;

[0070] S10: Insulation test: Conduct insulation and withstand voltage tests on the energy storage liquid cooling plate;

[0071] S11: Surface treatment: Use acid and alkali cleaning, anodizing, electrophoresis, passivation and other surface treatments to improve the corrosion resistance of the liquid cooling plate;

[0072] S12: Laser coding;

[0073] S13: Packaging. Obtain the energy storage liquid cooling plate A1.

[0074] Comparative Example

[0075] The liquid cooling plate DA1 was obtained by conventional aluminum alloy brazing.

[0076] The main production process is: raw material stamping - cleaning - brazing agent coating - riveting - brazing - testing - sealing.

[0077] A non-contact infrared temperature measurement method was used to test the temperature of the equipment using the liquid cooling plate A1 of the present invention and the existing liquid cooling plate DA1. The test positions were 5 points on the same surface of the equipment: when the conditions such as liquid properties, liquid flow rate, number of flow channels, liquid flow rate, liquid initial temperature, liquid pressure, and equipment operation time were the same, the temperatures of the working environment points of the equipment using the liquid cooling plate A1 of the present invention after operation were: point A 33°C, point B 36°C, point C 38°C, point D 34°C, and point E 39°C, while the temperatures of the working environment points of the equipment using the existing liquid cooling plate DA1 after operation were: point A 36°C, point B 43°C, point C 40°C, point D 37°C, and point E 46°C. The working environment temperature of the equipment using the existing liquid cooling plate was higher after operation, while the working environment temperature of the equipment using the liquid cooling plate of the present invention was lower after operation, with an average temperature of about 4.4°C lower, a maximum temperature difference of 7°C, and a minimum temperature difference of 3°C.

[0078] The tensile strength test was performed on the liquid cooling plate A1 body of the present invention. The body material is 6063 aluminum alloy material, the state is T6 state, and the tensile strength is 249MPa. The tensile strength test was performed on the liquid cooling plate DA1 body after brazing. The tensile strength of the liquid cooling plate body after brazing is 155MPa. The strength of the liquid cooling plate body of the present invention is 94MPa higher than that of the existing liquid cooling plate body.

[0079] In summary, the energy storage liquid cooling plate provided by the present invention has better heat dissipation capability and structural strength.

[0080] The structure of the energy storage liquid cooling plate is shown in the attached Figure 1-Figure 4 As shown, the main structure of the liquid cooling plate is as follows Figure 5-Figure 7 shown.

[0081] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy storage liquid cooling plate, characterized in that: The liquid cooling plate comprises: a liquid cooling plate body, a liquid inlet, a liquid outlet and an end plate; Wherein, the liquid cooling plate body is made by integrated extrusion, and the liquid cooling plate body comprises: a fin plate, a heat collecting strip, a flow channel, a wing plate and an assembly hole; Wherein, the fin plate is provided with guide air holes, and the minimum spacing between the guide air holes is 10 mm; Wherein, the heat collecting strips are located on the upper plate surface and / or the lower plate surface of the liquid cooling plate body.

2. The energy storage liquid cooling plate according to claim 1, characterized in that: The end plate, the liquid inlet and the liquid outlet are assembled with the liquid cooling plate body by plugging and then assembled and welded by laser wire welding.

3. The energy storage liquid cooling plate according to claim 1, characterized in that: The flow channel is located on the liquid cooling plate body, and the fin plate is located on the upper plate surface or the lower plate surface of the liquid cooling plate body.

4. The energy storage liquid cooling plate according to claim 1, characterized in that: The fin plate is composed of a plate fin and a web plate, wherein the web plate is located on the liquid cooling plate body, and the plate fin is located above the web plate and is perpendicular to the web plate; Preferably, the fins are arranged in parallel order, horizontally placed at an angle of 0° to the horizontal direction, and in a rectangular shape.

5. The energy storage liquid cooling plate according to claim 1, characterized in that: The wing plates are located on both sides of the liquid cooling plate body; Wherein, the flow channel is a multi-cavity flow channel.

6. A method for preparing an energy storage liquid cooling plate according to any one of claims 1 to 5, characterized in that: The preparation method comprises: extrusion of the liquid cooling plate body; cutting of raw materials; processing of parts; pretreatment; assembly welding; post-welding numerical control and laser cutting finishing; cleaning; testing; surface treatment; laser coding; packaging; The conditions for extrusion of the liquid cooling plate body include: mold heating temperature of 490-510°C, extrusion barrel temperature of 420-460°C, ingot temperature of 500-520°C, extrusion coefficient of 15-40, and extrusion speed of 3-6m / min; The guide air holes are processed by laser drilling, and the processing conditions include a cutting speed of 1.0-16.0 m / min and a laser power of 1.5 kW-8.0 kW.

7. The preparation method according to claim 6, characterized in that: The parts processing includes CNC processing, milling and laser cutting of the parts; Wherein, the pretreatment is mechanical grinding and surface cleaning of the parts to remove the surface oxide film and dirt; Wherein, the assembly welding adopts laser wire filling welding.

8. The preparation method according to claim 6, characterized in that: The tests are air tightness test, online dimension test and insulation test; The surface treatment adopts acid and alkali cleaning, anodizing, electrophoresis and passivation.

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