A 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, as well as its production process and application

Abstract

The present invention relates to the field of aluminum alloy automotive parts production, and more particularly to a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, as well as its production process and application. The profile primarily includes improvements to molds, melting, casting, and extrusion processes. Unlike conventional 3-series alloy formulas, the profile incorporates relatively high amounts of Si and Fe. The high Si and Fe content can form an Al(MnFe)Si compound with Mn, and the phase structure can be adjusted through a heat treatment process. Furthermore, during the extrusion process, the profile is crushed under pressure to form a pinning phase that refines the grains, thereby achieving the purpose of grain refinement and enhancing the profile strength. Furthermore, by consuming the Mn element, the amount of AlMn nano-dispersed phases can be reduced, thereby improving the thermal conductivity of the material. Furthermore, by adding Si, the thermal expansion coefficient of the material can be appropriately reduced, facilitating the overall assembly of the profile and battery cells and space utilization. Furthermore, by controlling the ratio of upper and lower diverter holes, uniform extrusion discharge is ensured.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy automobile parts production, and in particular to a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, a production process, and applications. Background Art

[0002] With the rapid development of new energy vehicles, the demand for battery energy density is increasing. Many battery manufacturers are completely eliminating module designs to save space and increase battery energy density. However, optimizing cooling structures is crucial to ensure temperature balance during battery operation, thereby further improving battery safety, lifespan, fast-charging performance, and specific energy density. With changes in battery structure, there is significant room for improvement in cooling plates, thermally conductive aluminum spheres, LIFSI (lithium bis(trifluoromethanesulfonyl imide), polyurethane, aerogel, and insulation materials. To better dissipate heat from large-capacity battery cells, cooling plates are being gradually relocated from the bottom of the cell to the side. Furthermore, because cooling plates are a core component of the water cooling module in the battery thermal management system, improving their heat transfer efficiency is also a key aspect of new energy vehicle battery development.

[0003] While traditional harmonica tubes are excellent heat conductors for water cooling, their small contact area can lead to uneven battery temperatures, necessitating their use with a vapor chamber. However, harmonica tubes are typically made of 3-series aluminum alloy and have extremely thin walls, approximately 0.4-0.5mm, while vapor chambers are made of 4-series aluminum alloy. The two need to be welded together for use, a process that can easily lead to wear through the tube, resulting in low yield rates and limited mass production. Furthermore, a small gap inevitably exists between the bottom of the tube and the vapor chamber, reducing thermal conductivity. Therefore, designing and producing a profile that integrates the harmonica tube and vapor chamber with excellent thermal conductivity can significantly improve the thermal conductivity of the water cooling plate. Summary of the Invention

[0004] The purpose of the present invention is to provide a high thermal conductivity, high strength, and easy-to-form 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, and its production process. Through mold design, alloy composition design, melting, casting, extrusion and aging process control, the present invention meets the needs of battery water cooling plates in new energy vehicles, and at least provides a beneficial option or creates conditions for solving one or more technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange and a production process thereof include the following steps.

[0007] 1) Melting and casting process.

[0008] 11) Ingredients: Prepare aluminum alloy raw materials according to the following weight ratio: Si 0.4~0.6%, Fe 0.4~0.5%, Cu0.05~0.15%, Mn 0.8~1.2%, Cr 0.05~0.10, B 0.03~0.07, Ti≤0.05%, single impurity ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0009] Different from the traditional 3-series alloy formula, a higher amount of Si and Fe elements are added. The high content of Si and Fe can form Al(MnFe)Si compounds with Mn, and the phase structure can be adjusted through heat treatment. At the same time, during the extrusion process, the pinning phase is formed by compression and crushing to refine the grains, thereby achieving the purpose of refining the grains and improving the strength of the profile. In addition, the consumption of Mn elements can reduce the number of AlMn nano-dispersed phases, improving the thermal conductivity of the material. In addition, the addition of Si content can appropriately reduce the thermal expansion coefficient of the material, which is beneficial to the overall assembly of the profile and battery cell and space utilization.

[0010] At the same time, Cr and Zr elements can also improve material performance on the basis of grain refinement, and the increase in material strength can increase the ultimate pressure of liquid cooling inside the heat exchange part, thereby improving cooling efficiency.

[0011] 12) Add the prepared aluminum alloy raw materials into a melting furnace to melt into aluminum liquid at a melting temperature of 700-760°C, and use an electromagnetic stirring device to stir evenly for 20-40 minutes; use a refining agent to perform 2-3 refining times, each refining time is 10-20 minutes; after standing for 15-70 minutes, degas online; use a 50ppi ceramic filter plate for plate filtration; tubular filtration; finally, cast the aluminum liquid into aluminum alloy casting rods at a casting temperature of 690-730°C and a casting speed of 40-80mm / min.

[0012] 13) The homogenization temperature is 570-600°C, and the holding time is 10-15 hours. After leaving the furnace, the steel is first air-cooled and then water-cooled. The strong air cooling time is ≤2.5 hours, and the water cooling time is ≤2 hours. The purpose of using high-temperature homogenization is mainly to eliminate microsegregation of the ingot, especially to promote the uniform distribution of the low-diffusion element Mn, while also promoting the transformation of the Fe phase to avoid residual acicular iron phase that affects extrusion performance.

[0013] 2) Moulding process.

[0014] Considering the integrated design of the heat exchanger (harmonica tube) and the temperature distribution plate, the asymmetric upper and lower wall thicknesses posed very high requirements for the mold. Unlike traditional molds, the upper and lower diversion holes also needed to be asymmetrically designed, with an area ratio of 1:1.6 to 1:2.2.

[0015] 3) Extrusion process.

[0016] 31) The extrusion equipment is a 1000-ton extruder, the aluminum rod diameter is 5 inches; the mold insulation time is 6 to 10 hours, the mold temperature is 450 to 490°C; the extrusion barrel temperature is 450 to 480°C.

[0017] 32) Aluminum rod temperature: The aluminum rod temperature is 500~540℃. A higher aluminum rod temperature can ensure that the material deformation resistance is reduced, better forming, and can meet the extrusion requirements of thin-walled materials.

[0018] 33) Extrusion speed: The profile discharge speed is 1.0~3.0m / min. When produced at this speed, the profile welding quality is better.

[0019] 34) Quenching: The profile outlet temperature is 540~560℃. After discharging, it is cooled by natural air or forced air. The cooling rate can reach more than 100℃ / minute to ensure that the internal grains will not grow due to the high temperature of the material, thereby affecting the material performance.

[0020] 35) After the extruded profile cools, it is straightened with a straightening amount of 0.3%~1.0% to eliminate product bending and twisting.

[0021] On the other hand, the present invention also provides a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, which is manufactured using the production process of the 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange as described above.

[0022] On the other hand, the present invention also provides the use of the above-mentioned 3-series aluminum alloy profile with integrated temperature equalization and heat exchange in the preparation of harmonica tubes for water-cooling and temperature equalization of new energy vehicle batteries.

[0023] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a schematic structural diagram of the extrusion die.

[0025] Figure 2 Shown is a diagram of the discharge speed of each part of the profile in Example 1.

[0026] Figure 3 Shown is a diagram of the discharge speed of each part of the profile in Example 7.

[0027] Figure 4 Shown is a diagram of the discharge speed of each part of the profile in Example 8.

[0028] Figure 5 Shown is a diagram of the discharge speed of each part of the profile in Example 9. DETAILED DESCRIPTION

[0029] To facilitate those skilled in the art to better understand the essence of the present invention, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Example 1.

[0031] A high thermal conductivity, uniform temperature, and heat exchange integrated 3-series aluminum alloy profile and its production process include the following steps.

[0032] 1) Melting and casting process.

[0033] 11) Ingredients: Prepare aluminum alloy raw materials according to the following weight ratio: Si 0.57%, Fe 0.47%, Cu 0.12%, Mn 1.16%, Cr 0.08%, B 0.06%, Ti ≤ 0.05%, individual impurities ≤ 0.03%, total impurities ≤ 0.15%, and the balance is Al.

[0034] Different from the traditional 3-series alloy formula, a higher amount of Si and Fe elements are added. The high content of Si and Fe can form Al(MnFe)Si compounds with Mn, and the phase structure can be adjusted through heat treatment. At the same time, during the extrusion process, the pinning phase is formed by compression and crushing to refine the grains, thereby achieving the purpose of refining the grains and improving the strength of the profile. In addition, the consumption of Mn elements can reduce the number of AlMn nano-dispersed phases, improving the thermal conductivity of the material. In addition, the addition of Si content can appropriately reduce the thermal expansion coefficient of the material, which is beneficial to the overall assembly of the profile and battery cell and space utilization.

[0035] At the same time, Cr and Zr elements can also improve material performance on the basis of grain refinement, and the increase in material strength can increase the ultimate pressure of liquid cooling inside the heat exchange part, thereby improving cooling efficiency.

[0036] 12) Add the prepared aluminum alloy raw materials into a melting furnace and melt them into aluminum liquid. The melting temperature is controlled at 750±10℃ and stirred evenly using an electromagnetic stirring device for 25 minutes. Refining is performed three times using a refining agent, each refining time is 10 minutes. After standing for 20 minutes, degassing is performed online. Plate filtration is performed using a 50ppi ceramic filter plate. Tubular filtration is performed. Finally, the aluminum liquid is cast into aluminum alloy rods at a casting temperature of 700℃ and a casting speed of 50mm / min.

[0037] 13) The homogenization temperature is 600°C, and the holding time is 10 hours. After leaving the furnace, the steel is first air-cooled and then water-cooled. The strong air cooling time is ≤2.5 hours, and the water cooling time is ≤2 hours. The purpose of using high-temperature homogenization is mainly to eliminate microsegregation in the ingot, especially to promote the uniform distribution of the low-diffusion element Mn, while also promoting the transformation of the Fe phase to prevent residual acicular iron phase from affecting extrusion performance.

[0038] 2) Moulding process.

[0039] Considering the need to integrate the heat exchange part (harmonica tube) and the temperature plate, the mold is very demanding due to the asymmetric thickness of the upper and lower walls. Different from the traditional mold, this embodiment adopts an asymmetric design for the upper and lower diversion holes, and the area ratio of the upper diversion hole A to the lower diversion hole B is 1:1.7. Figure 1 shown.

[0040] 3) Extrusion process.

[0041] 31) The extrusion equipment is a 1000-ton extruder, the aluminum rod diameter is 5 inches, the mold insulation time is 7 hours, the mold temperature is 490°C, and the extrusion barrel temperature is 470°C.

[0042] 32) Aluminum rod temperature: The aluminum rod temperature is 540℃. A higher aluminum rod temperature can ensure that the material deformation resistance is reduced, better forming, and can meet the extrusion requirements of thin-walled materials.

[0043] 33) Extrusion speed: The profile discharge speed is 1.1m / min. At this speed, the profile welding quality is better.

[0044] 34) Quenching: The profile outlet temperature is 540℃. After discharging, it is cooled by natural air or forced air. The cooling rate can reach more than 100℃ / minute to ensure that the internal grains will not grow due to the high temperature of the material, thereby affecting the material performance.

[0045] 35) After the extruded profile is cooled, it is straightened by 0.5% to eliminate the bending and twisting of the product. It is a 3 series aluminum alloy profile with high thermal conductivity, uniform temperature and heat exchange.

[0046] Example 2.

[0047] A high thermal conductivity, uniform temperature, and heat exchange integrated 3-series aluminum alloy profile and its production process include the following steps.

[0048] 1) Melting and casting process.

[0049] 11) Ingredients: Prepare aluminum alloy raw materials according to the following weight ratio: Si 0.45%, Fe 0.42%, Cu 0.07%, Mn 0.9%, Cr 0.06%, B 0.04%, Ti ≤ 0.05%, individual impurities ≤ 0.03%, total impurities ≤ 0.15%, and the balance is Al.

[0050] Different from the traditional 3-series alloy formula, a higher amount of Si and Fe elements are added. The high content of Si and Fe can form Al(MnFe)Si compounds with Mn, and the phase structure can be adjusted through heat treatment. At the same time, during the extrusion process, the pinning phase is formed by compression and crushing to refine the grains, thereby achieving the purpose of refining the grains and improving the strength of the profile. In addition, the consumption of Mn elements can reduce the number of AlMn nano-dispersed phases, improving the thermal conductivity of the material. In addition, the addition of Si content can appropriately reduce the thermal expansion coefficient of the material, which is beneficial to the overall assembly of the profile and battery cell and space utilization.

[0051] At the same time, Cr and Zr elements can also improve material performance on the basis of grain refinement, and the increase in material strength can increase the ultimate pressure of liquid cooling inside the heat exchange part, thereby improving cooling efficiency.

[0052] 12) Add the prepared aluminum alloy raw materials into a melting furnace to melt into aluminum liquid at a melting temperature of 710±10℃, and use an electromagnetic stirring device to stir evenly for 40 minutes; use a refining agent to perform two refining times, each refining time is 20 minutes; after standing for 60 minutes, degas online; use a 50ppi ceramic filter plate for plate filtration; tubular filtration; finally, cast the aluminum liquid into aluminum alloy casting rods at a casting temperature of 690~720℃ and a casting speed of 70mm / min.

[0053] 13) The homogenization temperature is 570°C, and the holding time is 15 hours. After exiting the furnace, the steel is first air-cooled and then water-cooled, with the strong air cooling time ≤ 2.5 hours and the water cooling time ≤ 2 hours. The purpose of using high-temperature homogenization is mainly to eliminate microsegregation of the ingot, especially to promote the uniform distribution of the low-diffusion element Mn, while also promoting the transformation of the Fe phase to prevent residual acicular iron phase from affecting extrusion performance.

[0054] 2) Moulding process.

[0055] Considering the integrated design of the heat exchanger (harmonica tube) and the temperature distribution plate, the asymmetric upper and lower wall thicknesses placed high demands on the mold. Unlike traditional molds, the upper and lower diversion holes are designed asymmetrically, with an upper to lower diversion hole area ratio of 1:1.7.

[0056] 3) Extrusion process.

[0057] 31) The extrusion equipment is a 1000-ton extruder, the aluminum rod diameter is 5 inches; the mold insulation time is 10 hours, the mold temperature is 450°C; the extrusion barrel temperature is 450°C.

[0058] 32) Aluminum rod temperature: The aluminum rod temperature is 500℃. A higher aluminum rod temperature can ensure that the material deformation resistance is reduced, better forming, and can meet the extrusion requirements of thin-walled materials.

[0059] 33) Extrusion speed: The profile discharge speed is 3.0m / min. At this speed, the profile welding quality is better.

[0060] 34) Quenching: The profile outlet temperature is 560℃. After discharging, it is cooled by natural air or forced air. The cooling rate can reach more than 100℃ / minute to ensure that the internal grains will not grow due to the high temperature of the material, thereby affecting the material performance.

[0061] 35) After the extruded profile is cooled, it is straightened by 1.0% to eliminate the bending and twisting of the product, and obtain a high thermal conductivity, uniform temperature and heat exchange integrated 3 series aluminum alloy profile.

[0062] Comparative Example 1.

[0063] A 3-series aluminum alloy profile and a production process thereof are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.05%, Fe 0.15%, Cu 0.11%, Mn 1.21%, Cr0.01%, B 0%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0064] Comparative Example 2.

[0065] A 3-series aluminum alloy profile and a production process thereof are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.48%, Fe 0.17%, Cu 0.09%, Mn 1.14%, Cr0.01%, B 0%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0066] Comparative Example 3.

[0067] A 3-series aluminum alloy profile and a production process thereof are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.04%, Fe 0.43%, Cu 0.12%, Mn 1.08%, Cr0.01%, B 0%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0068] Comparative Example 4.

[0069] A 3-series aluminum alloy profile and a production process thereof are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.05%, Fe 0.16%, Cu 0.11%, Mn 1.22%, Cr0.09%, B 0%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0070] Comparative Example 5.

[0071] A 3-series aluminum alloy profile and a production process thereof, which are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.04%, Fe 0.11%, Cu 0.08%, Mn 1.01%, Cr0.01%, B 0.05%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0072] Comparative Example 6.

[0073] A 3-series aluminum alloy profile and a production process thereof are basically the same as those in Example 1, except that, in the batching process, the aluminum alloy raw material is prepared according to the following weight ratio: Si 0.40%, Fe 0.41%, Cu 0.09%, Mn 1.09%, Cr0.06%, B 0%, Ti≤0.05%, individual impurities ≤0.03%, total impurities ≤0.15%, and the balance is Al.

[0074] Performance testing.

[0075] In order to better reflect the advancement of the present invention, the thermal conductivity, tensile strength, and thermal expansion coefficient of Examples 1-2 and Comparative Examples 1-6 were measured, and the results are shown in Table 1.

[0076] Table 1. Performance test comparison

[0077] Comparative ingredient 1 Comparative ingredient 2 Comparative ingredient 3 Comparative ingredient 4 Comparative ingredient 5 Comparative ingredient 6 Example 1 Example 2 Thermal conductivity W / (m•K) 164 159 168 161 170 172 185 179 Tensile strength / Mpa 153 157 155 155 151 187 183 194 .

[0078] Comparative Example 7.

[0079] A 3 series aluminum alloy profile and a production process thereof are basically the same as Example 1, except that, in the mold process, the area ratio of the upper diversion hole to the lower diversion hole is 1:2.1.

[0080] Comparative Example 8.

[0081] A 3 series aluminum alloy profile and a production process thereof are basically the same as Example 1, except that, in the mold process, the area ratio of the upper diversion hole to the lower diversion hole is 1:2.5.

[0082] Comparative Example 9.

[0083] A 3 series aluminum alloy profile and a production process thereof are basically the same as Example 1, except that, in the mold process, the area ratio of the upper diversion hole to the lower diversion hole is 1:1.5.

[0084] The extrusion tests of Example 1 and Comparative Examples 7-9 are as follows Figure 2-Figure 5 As shown. Figure 2-Figure 5 It can be seen that when the area ratio of the upper diverter hole to the lower diverter hole is 1.5, the side flow is fast; when the area ratio of the upper diverter hole to the lower diverter hole is 2.5, the side flow is slow; when the area ratio of the upper diverter hole to the lower diverter hole is 1.7 or 2.1, the discharge speed is uniform.

[0085] It should be noted that the various technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art could make numerous modifications and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention. Any portions not described in the specific embodiments represent prior art or common knowledge.

[0087] It should also be noted that, in the description of the present invention, the detailed description of the preferred embodiment of the present invention and the included embodiments can more easily understand the content of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In the event of a conflict, the definitions in this specification shall prevail.

[0088] As used herein, the term "prepared from" is used synonymously with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variations thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0089] In the present invention, when amount, concentration or other value or parameter is expressed as a range, preferred range or a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including a range of "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. When a numerical range is described in the present invention, unless otherwise stated, the range is intended to include its end value and all integers and fractions within the range.

[0090] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention do not limit the quantity requirement (i.e., the number of times the elements or components appear). Therefore, "a" or "an" should be interpreted as including one or at least one, and elements or components in the singular also include plural forms, unless the number is obviously intended to be singular.

Claims

1. A production process for 3 series aluminum alloy profiles with integrated temperature uniformity and heat exchange, characterized in that: It mainly includes the following processes: 1) Melting and casting process; 11) Ingredients: Prepare aluminum alloy raw materials according to the following weight ratio: Si 0.4-0.6%, Fe 0.4-0.5%, Cu 0.05-0.15%, Mn 0.8-1.2%, Cr 0.05-0.10%, B 0.03-0.07%, Ti ≤ 0.05%, individual impurities ≤ 0.03%, total impurities ≤ 0.15%, and the balance is Al; 12) Casting rods: Add the prepared aluminum alloy raw materials into the melting furnace to melt into aluminum liquid, and cast the aluminum liquid into aluminum alloy casting rods; 13) Homogenization treatment: the homogenization temperature is 570~600℃, the holding time is 10~15h, and after being taken out of the furnace, it is first air-cooled and then water-cooled. The strong air cooling time is ≤2.5h and the water cooling time is ≤2h; 2) Die process: The upper and lower diverter holes of the extrusion die are designed to be asymmetrical, and the area ratio of the upper and lower diverter holes is between 1:1.6 and 1:2.2; 3) Extrusion process: The extrusion discharge speed is controlled at 1.0~3.0m / min. After extrusion, the material is quenched and straightened to obtain a 3 series aluminum alloy profile with uniform temperature and heat exchange.

2. The production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange according to claim 1, characterized in that: In the rod casting process, the melting temperature of the melting furnace is 700~760℃. The melting process includes the following processing steps: 1) using electromagnetic stirring equipment to stir evenly, and the stirring time is 20~40 minutes; 2) using refining agent to perform 2-3 refining, and each refining time is 10~20 minutes; 3) standing for 15~70 minutes and then degassing online; 4) filtering; after filtration, the aluminum liquid is cast into aluminum alloy rods.

3. The production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange according to claim 1 or 2, characterized in that: In the rod casting process, the casting temperature is 690~730℃ and the casting speed is 40~80mm / min.

4. The production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange according to claim 1, characterized in that: During the extrusion process, the mold insulation time is 6~10h, the mold temperature is 450~490℃; the extrusion barrel temperature is 450~480℃, and the aluminum rod temperature is 500~540℃.

5. The production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange according to claim 1 or 4, characterized in that: The temperature of the extruded profile outlet is 540~560℃. After discharge, it is cooled by natural air or forced air, and the cooling rate reaches more than 100℃ / minute.

6. The production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange according to claim 1, characterized in that: The straightening amount of the straightening operation is 0.3%~1.0%.

7. A 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange, characterized in that: The invention is produced by using the production process of a 3-series aluminum alloy profile with integrated temperature uniformity and heat exchange as described in any one of claims 1 to 6.

8. Use of the 3-series aluminum alloy profile with integrated temperature equalization and heat exchange as claimed in claim 7 in the preparation of harmonica tubes for water cooling and temperature equalization of new energy vehicle batteries.

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