A heat treatment free high strength aluminum alloy battery tray casting method and die

Abstract

The application discloses a heat treatment-free high-strength aluminum alloy battery tray casting method and a die, improves the performance of a product through improvement of aluminum alloy solution proportioning and the die, and enables the product to meet the requirements without heat treatment; the application performs phased die casting in the die casting process, the force of extrusion of a pressing plate on a die core and a side plate and the die casting pressure become larger in the die casting process, the die is improved and the pressure is adjusted, thereby adapting to the molding of the aluminum alloy solution, increasing the yield, reducing the waste product rate through phased die casting molding, and increasing the performance of the product.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle battery tray manufacturing technology, and in particular to a heat-free high-strength aluminum alloy battery tray casting method and mold. Background Technology

[0002] The battery tray is relatively large with thin casting walls. The standard dimensions are 2400mm*850mm*260mm, with a wall thickness of 5mm. As it is a large, thin-walled casting, it is made of A356.2 material, which has poor fluidity. The defect rate is high after filling the thin-walled areas of the casting. In addition, to solve this problem, it is necessary to increase the temperature of the aluminum liquid and the mold temperature during casting to reduce the casting defect rate. If the mold temperature or the aluminum liquid temperature is too high, shrinkage porosity or shrinkage cavities will occur in the hot spot area of ​​the casting body. High aluminum liquid temperature will cause serious hydrogen absorption and make the casting prone to pinholes. At the same time, it will also result in high energy consumption during the casting process. Summary of the Invention

[0003] To address the technical problems existing in the background art, this invention proposes a heat-free high-strength aluminum alloy battery tray casting method and mold.

[0004] The present invention proposes a method for casting high-strength aluminum alloy battery trays without heat treatment, comprising the following steps:

[0005] Liquid aluminum alloy at a temperature of 680–720℃ is injected into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 9.0%–10.5%, Si 7.5%–9%, ​​Mg 0.25%–0.45%, Fe≤0.2%, Mn 0.05%–0.15%, Cu≤0.1%, Ti 0.08%–0.2%, Zr 0.05%–0.1%, with the balance being Al and unavoidable impurities, totaling 100%. After the liquid aluminum alloy is injected into the mold, it is die-cast in stages.

[0006] Preferably, the side of the mold furthest from the injection port of the cavity is cooled during the die casting process.

[0007] Preferably, the staged die casting process includes: die casting under a first pressure for 10-15 seconds, followed by die casting under a second pressure for 15-25 seconds; then die casting under a third pressure for 25-25 seconds; and finally die casting under a fourth pressure, wherein the first pressure < the second pressure < the third pressure < the fourth pressure.

[0008] Preferably, the total mass percentage of Mg and Zn is 9.5% to 10.7%.

[0009] Preferably, the total mass percentage of Mg and Si is 7.8% to 9.1%.

[0010] Preferably, the Zr / Ti ratio is 0.5 to 1.25.

[0011] Preferably, the total mass percentage of Zr and Ti is 0.15% to 0.3%.

[0012] A heat-free high-strength aluminum alloy battery tray casting mold includes a base plate, a lower template on the base plate, and a lower guide groove on the lower template;

[0013] The lower template is provided with side plates and a mold core. The side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate. The lower template, the first side plate, the second side plate, the third side plate, and the fourth side plate form a cavity with the mold core.

[0014] The mold core has an upper guide groove, and the upper guide groove and the lower guide groove form a guide channel that communicates with the cavity;

[0015] It also includes a pressure plate, which is placed on the mold core and the side plate. The pressure plate is equipped with a lifting plate by an elastic element. The lifting plate changes the force on the pressure plate by squeezing the elastic element, and the squeezing of the pressure plate by the lifting plate increases as the die casting pressure increases during the die casting process.

[0016] Preferably, the third side plate is slidably mounted on the lower template, and the third side plate is opposite to and parallel to the first side plate. The second side plate and the fourth side plate are parallel to each other and opposite to each other. The sides of the second side plate and the fourth side plate abut against the first side plate and the third side plate. The bottom plate is also slidably provided with a tensioning plate that contacts the telescopic member. The tensioning plate is used to press the third side plate against the first side plate and thus achieve the pressing of the third side plate and the fourth side plate.

[0017] Preferably, as the die-casting pressure increases, the clamping force of the clamping plate on the third side plate increases accordingly, and the clamping force of the clamping plate on the third side plate is minimal during the product cooling process.

[0018] Preferably, a guide assembly is provided between the pressure plate and the lifting plate. The guide assembly includes a first guide post disposed on the lifting plate, and a first guide hole is formed on the pressure plate, within which the first guide post slides.

[0019] Preferably, the mold core is further provided with a second guide hole, which is connected to the first guide hole, and the displacement of the lifting plate is greater than the thickness of the pressure plate, so that the first guide post can move into the second guide hole.

[0020] Preferably, the pressure plate is provided with a first cooling channel, and a circulating cooling medium is introduced into the first cooling channel to cool the pressure plate.

[0021] The heat-free high-strength aluminum alloy battery tray casting method and mold proposed in this invention, through mold improvement, are adapted to the molding of aluminum alloy solution and the yield is increased. Through staged die casting molding, the scrap rate is reduced and the performance of the product is increased.

[0022] The synergistic effects of various elements in the aluminum alloy solution result in aluminum alloys with excellent load-bearing capacity and impact resistance. Zn, as the main alloying element, improves the fluidity of the molten metal, reduces the viscosity of the aluminum liquid, and forms MgZn2 (η phase) with Mg, which precipitates spontaneously at room temperature, significantly improving strength, hardness, and elongation without heat treatment. Si, as the main alloying element, enhances the casting fluidity and wear resistance of the aluminum alloy, forming the Mg2Si strengthening phase with Mg, achieving precipitation strengthening in the as-cast state and improving material strength without heat treatment. Mn refines grains, suppresses the harmful effects of the Al-Fe phase, improves the toughness and resistance to hot cracking, and improves the casting processability of the aluminum alloy, adapting to the high-temperature forming requirements of integrated die casting. Mg and Si form the Mg2Si strengthening phase, which is the core element for achieving high strength without heat treatment, while also improving the material's corrosion resistance. Cu assists in strengthening, improving the tensile strength and hardness of the material, and enhancing its machinability. Ti refines the as-cast grains, improving the strength, toughness, and resistance to deformation of the material, inhibiting grain growth, and improving the uniformity of the material's mechanical properties. Zr and Ti work synergistically to further optimize the as-cast microstructure of the material.

[0023] Additional aspects and advantages of the 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

[0024] Figure 1 This is a schematic diagram of the mold structure of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the present invention from another angle;

[0027] Figure 4 This is a schematic diagram of the mold core structure of the present invention;

[0028] In the diagram: 1. Lower template; 2. First side plate; 3. Second side plate; 4. Third side plate; 5. Fourth side plate; 6. Mold core; 60. Drainage channel; 7. Pressure plate; 8. Lifting plate; 9. Spring; 10. Clamping plate; 11. First guide post; 12. First guide hole; 13. Second guide hole; 14. Outer protective plate; 15. Base plate. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] like Figures 1-4 The above-described heat-free high-strength aluminum alloy battery tray casting mold includes a base plate 15, a lower template 1 on the base plate 15, a receiving groove on the lower template 1, and a temperature detection element in the receiving groove.

[0031] The lower template 1 has a lower runner groove, and the lower template 1 is provided with a first side plate 2, a second side plate 3, a third side plate 4, a fourth side plate 5, and a mold core 6. The mold core 6, the lower template 1, the first side plate 2, the second side plate 3, the third side plate 4, and the fourth side plate 5 form a molding cavity, and the runner is connected to the molding cavity. Since the bottom of the molding cavity is the top surface structure of the mold core 6, it is easy to cool it while ensuring the accuracy of the cavity through processing.

[0032] It also includes a pressure plate 7, which is placed on the mold core 6 and the side plates (including the first side plate 2, the second side plate 3, the third side plate 4 and the fourth side plate 5). The pressure plate 7 is provided with a lifting plate 8 through an elastic element, which can be a spring 9. The lifting plate 8 squeezes the pressure plate 7 by squeezing the elastic element, thereby squeezing the mold core 6 and the side plates and applying pressure to them as a whole. The squeezing force of the lifting plate 8 on the pressure plate 7 increases as the die casting pressure increases during the product die casting process, and the squeezing force of the lifting plate 8 on the pressure plate 7 is the minimum during the cooling process.

[0033] Preferably, the third side plate 4 is laterally slidably mounted on the lower template 1, and the third side plate 4 is opposite and parallel to the first side plate 2. The second side plate 3 and the fourth side plate 5 are parallel and opposite to each other, and the sides of the second side plate 3 and the fourth side plate 5 abut against the first side plate 2 and the third side plate 4. A clamping plate 10 is also slidably provided on the bottom plate 15, which contacts the telescopic components such as the hydraulic cylinder. The clamping plate 10 is used to clamp the third side plate 4, thereby clamping the third side plate 4 and the fourth side plate 5. The clamping of the third side plate 4 by the telescopic components of the hydraulic cylinder facilitates the application of pressure to the structure inside the cavity. Since aluminum alloy has the characteristic of cold shrinkage, preferably, as the die-casting pressure increases, the clamping force of the clamping plate 10 on the third side plate 4 increases accordingly, and the clamping force of the clamping plate 10 on the third side plate 4 is minimal during the product cooling process.

[0034] Preferably, a guide assembly is provided between the pressure plate 7 and the lifting plate 8. The guide assembly includes a first guide post 11 disposed on the lifting plate 8. The pressure plate 7 has a first guide hole 12, and the first guide post 11 slides within the first guide hole 12.

[0035] Preferably, the mold core 6 also has a second guide hole 13, which is connected to the first guide hole 12. The displacement of the lifting plate 8 is greater than the thickness of the pressure plate 7, and the first guide post 11 can move into the second guide hole 13 to further reduce the scrap rate.

[0036] Preferably, the pressure plate 7 is provided with a first cooling channel, and the external circulating cooling medium is introduced to cool the pressure plate 7, thereby indirectly cooling the components in the cavity. Preferably, it also includes a first cooling channel in the flow guide plate, through which the external cooling medium enters or exits the first cooling channel.

[0037] Preferably, a drainage groove 60 is provided on the side of the mold core 6 near the corner, thereby increasing the molding effect at the corner and increasing the molding efficiency.

[0038] Preferably, the bottom of the mold core 6 has an upper runner groove, and the upper runner groove and the lower runner groove form a runner, through which the aluminum alloy solution enters the runner and then enters the cavity;

[0039] Preferably, it also includes an outer protective plate 14 installed on the base plate 15. The outer protective plate 14 is provided in four sets. One set of outer protective plates 14 abuts against one set of side plates, thereby achieving further positioning of the side plates. The outer protective plate 14 has a second cooling channel, and the external cooling medium can circulate in the outer protective plate 14 to achieve cooling of the side plates.

[0040] Example 1

[0041] A method for casting a high-strength aluminum alloy battery tray without heat treatment involves injecting liquid aluminum alloy at a temperature of 680–720°C into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 10%, Si 8%, Mg 0.3%, Fe 0.2%, Mn 0.1%, Cu 0.1%, Ti 0.15%, Zr 0.08%, with the balance being Al and unavoidable impurities, totaling 100%. Specifically, S1, raw materials are weighed according to the chemical composition of the high-strength aluminum alloy without heat treatment, melted at 750°C, refined and degassed by argon gas, and 0.1% AlSr10 modifier (Sr content 10%) and 0.1% AlTi5Bi1 grain refiner (Ti content 5%, Bi content 1%) are added to refine the grains, resulting in an aluminum alloy melt.

[0042] After the molten aluminum alloy is injected into the mold, it is die-cast in stages.

[0043] Specifically, the aluminum alloy melt is die-cast at 700℃ for 12 seconds at a pressure of 240 mbar, then at 340 mbar for 20 seconds, then at 480 mbar for 30 seconds, and finally at 495 mbar for 120 seconds. It is then cooled to room temperature for 150 seconds. During both the die-casting and cooling processes, the coolant circulates within the pressure plate 7 and the outer protective plate 14. The temperature of the coolant during the cooling process is lower than that during the die-casting process, resulting in the outer frame of a high-strength aluminum alloy battery tray that does not require heat treatment.

[0044] During the die casting process, the side of the mold away from the liquid injection port of the cavity is cooled, and the side of the mold is also cooled during the die casting process. Specifically, the mold can be cooled by circulating liquid cooling medium, thereby reducing the scrap rate.

[0045] Example 2

[0046] A method for casting high-strength aluminum alloy battery trays without heat treatment involves injecting liquid aluminum alloy at a temperature of 680–720°C into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 9.8%, Si 8.1%, Mg 0.3%, Fe 0.2%, Mn 0.13%, Cu 0.1%, Ti 0.15%, Zr 0.08%, with the balance being Al and unavoidable impurities, totaling 100%. Specifically, Si is melted at 740°C, refined and degassed by argon gas, and 0.1% AlSr10 modifier (Sr content 10%) and 0.1% AlTi5Bi1 grain refiner (Ti content 5%, Bi content 1%) are added to refine the grains, resulting in an aluminum alloy melt.

[0047] S2. The molten aluminum alloy is injected into the mold at 700℃. First, it is die-cast at a pressure of 235mbar for 12s, then at a pressure of 340mbar for 20s, then at a pressure of 480mbar for 30s, and finally at a pressure of 495mbar for 120s. It is then cooled to room temperature for 150s. During both the die-casting and cooling processes, the coolant is circulated in the pressure plate 7 and the outer protective plate 14. The temperature of the coolant during the cooling process is lower than that during the die-casting process, resulting in a high-strength aluminum alloy pallet frame that does not require heat treatment.

[0048] Example 3

[0049] A method for casting high-strength aluminum alloy battery trays without heat treatment involves injecting liquid aluminum alloy at a temperature of 680–720°C into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 10.2%, Si 8.2%, Mg 0.4%, Fe 0.2%, Mn 0.13%, Cu 0.1%, Ti 0.2%, Zr 0.1%, with the balance being Al and unavoidable impurities, totaling 100%. Specifically, the aluminum alloy melt is melted at 750°C, refined and degassed by argon gas, and 0.1% AlSr10 modifier (Sr content 10%) and 0.1% AlTi5Bi1 grain refiner (Ti content 5%, Bi content 1%) are added to refine the grains, resulting in the aluminum alloy melt.

[0050] S2. Die-cast at a pressure of 235 mbar for 12 seconds, then at a pressure of 335 mbar for 20 seconds, then at a pressure of 495 mbar for 29 seconds, and finally at a pressure of 495 mbar for 120 seconds. Cool to room temperature for 150 seconds. During both die-casting and cooling, the coolant circulates within the pressure plate 7 and the outer protective plate 14. The temperature of the coolant during cooling is lower than that during die-casting, resulting in a high-strength aluminum alloy pallet frame that does not require heat treatment.

[0051] Example 4

[0052] A method for casting high-strength aluminum alloy battery trays without heat treatment involves injecting liquid aluminum alloy at a temperature of 680–720°C into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 10.2%, Si 8.3%, Mg 0.42%, Fe 0.15%, Mn 0.15%, Cu 0.1%, Ti 0.2%, Zr 0.1%, with the balance being Al and unavoidable impurities, totaling 100%. Specifically, the alloy is melted at 750°C, refined and degassed by argon gas, and grain refined by adding 0.1% AlSr10 modifier (Sr content 10%) and 0.1% AlTi5Bi1 refiner (Ti content 5%, Bi content 1%) to obtain an aluminum alloy melt. The aluminum alloy melt is then pressed into the mold cavity.

[0053] S2. The aluminum alloy melt is die-cast at 720℃, first at a pressure of 235 mbar for 12s, then at a pressure of 335 mbar for 20s, then at a pressure of 495 mbar for 29s, and finally at a pressure of 495 mbar for 120s. It is then cooled to room temperature for 150s. During both the die-casting and cooling processes, the coolant is circulated within the pressure plate 7 and the outer protective plate 14. The temperature of the coolant during the cooling process is lower than that during the die-casting process, resulting in a heat-free high-strength aluminum alloy pallet frame.

[0054] Example 5

[0055] A method for casting high-strength aluminum alloy battery trays without heat treatment involves injecting liquid aluminum alloy at a temperature of 680–720°C into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 10%, Si 8.7%, Mg 0.45%, Fe 0.2%, Mn 0.1%, Cu 0.1%, Ti 0.15%, Zr 0.08%, with the balance being Al and unavoidable impurities, totaling 100%. Specifically, the alloy is melted at 750°C, refined and degassed by argon gas, and then grain-refined by adding 0.1% AlSr10 modifier (Sr content 10%) and 0.1% AlTi5Bi1 refiner (Ti content 5%, Bi content 1%) to obtain an aluminum alloy melt. The aluminum alloy melt is then pressed into the mold cavity.

[0056] S2. The aluminum alloy melt is die-cast at 720℃ with a pressure of 235 mbar for 12 seconds, then with a pressure of 335 mbar for 20 seconds, then with a pressure of 495 mbar for 29 seconds, and finally with a pressure of 495 mbar for 120 seconds. It is then cooled to room temperature for 150 seconds to obtain a heat-free high-strength aluminum alloy. During both the die-casting and cooling processes, the coolant is circulated in the pressure plate 7 and the outer protective plate 14. The temperature of the coolant during the cooling process is lower than that during the die-casting process, resulting in a heat-free high-strength aluminum alloy tray frame.

[0057] The tensile strength, yield strength, and elongation of the above aluminum alloy were tested according to GB / T 16865-2023, and the test results are shown in Table 1.

[0058] Table 1

[0059] Group Tensile strength / MPa Yield strength / MPa Elongation / % Example 1 341.2 270.7 6.0 Example 2 339.5 265.2 6.8 Example 3 346.3 273.1 6.5 Example 4 347.8 272.9 6.6 Example 5 350.3 278.6 5.8

[0060] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for casting a high-strength aluminum alloy battery tray without heat treatment, characterized in that, Includes the following steps: Liquid aluminum alloy at a temperature of 680–720℃ is injected into a mold for low-pressure die casting. The chemical composition of the liquid aluminum alloy, by mass percentage, includes: Zn 9.0%–10.5%, Si 7.5%–9%, ​​Mg 0.25%–0.45%, Fe≤0.2%, Mn 0.05%–0.15%, Cu≤0.1%, Ti 0.08%–0.2%, Zr 0.05%–0.1%, with the balance being Al and unavoidable impurities, totaling 100%. After the liquid aluminum alloy is injected into the mold, it is die-cast in stages.

2. The method for casting a high-strength aluminum alloy battery tray without heat treatment according to claim 1, characterized in that, During the die casting process, the side of the mold furthest from the injection port of the cavity is cooled.

3. The method for casting a high-strength aluminum alloy battery tray without heat treatment according to claim 1, characterized in that, The staged die casting process includes: die casting under a first pressure for 10-15 seconds, followed by die casting under a second pressure for 15-25 seconds; then die casting under a third pressure for 25-25 seconds; and finally die casting under a fourth pressure, wherein the first pressure < the second pressure < the third pressure < the fourth pressure.

4. The method for casting a high-strength aluminum alloy battery tray without heat treatment according to claim 1, characterized in that, The total mass percentage of Mg and Zn is 9.5% to 10.7%.

5. A heat-treatable, high-strength aluminum alloy battery tray casting mold, characterized in that, Includes a base plate, on which a lower template is provided, and on which a lower guide groove is provided; The lower template is provided with side plates and a mold core. The side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate. The lower template, the first side plate, the second side plate, the third side plate, and the fourth side plate form a cavity with the mold core. The mold core has an upper guide groove, and the upper guide groove and the lower guide groove form a guide channel that communicates with the cavity; It also includes a pressure plate, which is placed on the mold core and the side plate. The pressure plate is equipped with a lifting plate by an elastic element. The lifting plate changes the force on the pressure plate by squeezing the elastic element, and the squeezing of the pressure plate by the lifting plate increases as the die casting pressure increases during the die casting process.

6. The heat-free high-strength aluminum alloy battery tray casting mold according to claim 5, characterized in that, The third side plate is slidably mounted on the lower template, and the third side plate is opposite to and parallel to the first side plate. The second side plate and the fourth side plate are parallel to each other and opposite to each other. The sides of the second side plate and the fourth side plate abut against the first side plate and the third side plate. The bottom plate is also slidably provided with a tensioning plate that contacts the telescopic member. The tensioning plate is used to press the third side plate against the first side plate, thereby achieving the pressing against the third side plate and the fourth side plate.

7. The heat-free high-strength aluminum alloy battery tray casting mold according to claim 6, characterized in that, As the die-casting pressure increases, the clamping force of the clamping plate on the third side plate also increases. The clamping force of the clamping plate on the third side plate is minimal during the product cooling process.

8. The heat-free high-strength aluminum alloy battery tray casting mold according to claim 5, characterized in that, A guide assembly is provided between the pressure plate and the lifting plate. The guide assembly includes a first guide post disposed on the lifting plate. A first guide hole is opened on the pressure plate, and the first guide post slides within the first guide hole.

9. The heat-free high-strength aluminum alloy battery tray casting mold according to claim 8, characterized in that, The mold core also has a second guide hole, which is connected to the first guide hole. The displacement of the lifting plate is greater than the thickness of the pressure plate, and the first guide post can move into the second guide hole.

10. The heat-free high-strength aluminum alloy battery tray casting mold according to claim 5, characterized in that, The pressure plate is provided with a first cooling channel, and a circulating cooling medium is introduced into the first cooling channel to cool the pressure plate.

Images