Downward pressing type battery pack upper cover cooling and shaping tool

Abstract

The embodiment of the application discloses a down-pressing type battery pack upper cover cooling and shaping tool, and belongs to the technical field of new energy automobile power battery manufacturing technology, which comprises a cooling platform, an aluminum plate, a profiled support plate and a cooling air source below the profiled support plate, a rack and a plurality of pressing units. The upper surface of the profiled support plate is matched with the inner surface profile of the battery pack upper cover, and a cooling flow channel is arranged on the upper surface and is communicated with the cooling air source, so that the cooling air flow is guided to the whole lower surface of the workpiece; the aluminum plate is provided with a passage through which the air flow passes. The plurality of pressing units are arranged continuously along the outer frame of the workpiece, each unit comprises an elastic pressing piece and a profiled pressing block, the elastic pressing piece provides independent elastic force, so that each profiled pressing block applies continuous and uniform flexible pressing constraint to the outer frame of the workpiece. The application can effectively solve the problems of warping, deformation, delamination and micro-cracks that are prone to occur during the cooling process after the composite material battery pack upper cover is molded, and guarantees the size precision and structural quality of the product.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle power battery manufacturing technology, specifically to a pressure-type battery pack cover cooling and shaping tooling. Background Technology

[0002] Composite material battery pack covers are core structural components of new energy vehicle power battery systems, serving multiple functions including structural support, lightweighting, insulation, heat insulation, and waterproofing / dustproofing. The molding process for these components primarily involves compression molding, leaving the preform in a high-temperature viscoelastic state where the internal molecular chains are not fully solidified. Directly allowing the preform to cool naturally after molding can lead to warping, deformation, dimensional deviations, and even defects such as resin-fiber delamination and microcracks due to uneven internal and external cooling rates, insufficient stress release, and lack of external shape constraints. These defects severely impact the battery pack's sealing performance, structural strength, and assembly precision.

[0003] In the prior art, the common approach to solve the above problems is to place the product to be cooled and shaped on a conformal nylon plate, use a cylinder to drive the surrounding flanges and the clamping blocks on the large surface to fix the product on the nylon plate, and use a cooling fan at the bottom for cooling.

[0004] However, the solution still has the following shortcomings: the clamping force is unevenly distributed, and relying solely on the peripheral flange and local clamping blocks, it is impossible to form a continuous, uniform, and flexible clamping constraint on the outer frame of the product, resulting in local warping deformation during the cooling process. In addition, the cold air is difficult to quickly cover the entire area of ​​the product, resulting in low cooling efficiency and a large temperature difference between the inside and outside.

[0005] Therefore, there is an urgent need to provide a cooling and shaping fixture that can achieve uniform compression, efficient cooling, and no damage to the product. Summary of the Invention

[0006] To address this, this invention provides a pressure-type battery pack cover cooling and shaping fixture to solve the technical problems in the prior art that easily occur during the cooling process after the composite material battery pack cover is molded, such as warping, deformation, dimensional deviation, delamination, and microcracks.

[0007] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A cooling and shaping fixture for a down-press type battery pack cover includes a cooling platform, an aluminum plate fixedly mounted on the cooling platform, a contour support plate and a cooling air source located below the contour support plate fixedly mounted on the cooling platform, a frame fixedly mounted on the cooling platform, and multiple pressing units that can move up and down on the frame. The upper surface shape of the contoured support plate matches the inner surface contour of the battery pack cover, and a cooling channel connected to the cooling air source is provided on the contoured support plate to guide the cooling airflow to the entire lower surface of the battery pack cover. The aluminum plate is provided with an airflow channel for cooling airflow to pass from the cooling air source to the bottom of the contour support plate; Multiple clamping units are continuously arranged along the outer frame contour of the battery pack cover. Each clamping unit includes an elastic clamping element and a contouring block. The lower surface shape of the contouring block matches the outer frame contour of the battery pack cover. The elastic clamping element provides an independent elastic clamping force for each clamping unit, so that multiple contouring blocks together apply a continuous and uniform flexible clamping constraint to the outer frame of the battery pack cover.

[0008] Furthermore, the contour support plate is a contour nylon plate, which is fixedly installed on the aluminum plate. The bottom surface of the contour support plate is in close contact with the upper surface of the aluminum plate, so that the airflow reaching the bottom of the contour support plate through the airflow channel is constrained and enters the cooling channel.

[0009] Furthermore, the cooling channel consists of multiple interconnected gas channels formed on the upper surface of the contoured nylon plate. Each gas channel is interconnected in the bottom region of the contoured support plate. After entering from the bottom of the contoured support plate, the airflow is diverted to each gas channel through the interconnected structure.

[0010] Furthermore, the cooling air source consists of multiple cooling fans installed on the cooling platform and located below the contour support plate. The air outlets of the cooling fans are vertically aligned with the airflow channels on the aluminum plate, so that the airflow generated by the cooling fans can directly reach the bottom of the contour support plate through the airflow channels.

[0011] Furthermore, the airflow channel is a cavity that connects the cooling platform and the aluminum plate, and the area of ​​the cavity is smaller than the area of ​​the aluminum plate; The cavity is equipped with an internal support frame formed by overlapping stainless steel square tubes. The upper end of the support frame is fixedly connected to the lower surface of the aluminum plate, and the lower end is fixedly connected to the upper surface of the cooling platform, so as to form a rigid support between the aluminum plate and the cooling platform and transfer the load borne by the aluminum plate to the cooling platform.

[0012] Furthermore, the frame includes support columns fixed at the four corners of the cooling platform, and crossbeams connected to the top of adjacent support columns. The support columns are fixed vertically to the cooling platform, and the crossbeams are connected to the top of the support columns and form a rectangular frame. Multiple drive cylinders are fixedly mounted on the crossbeam. A movable steel frame is fixedly mounted at the lower end of the piston rod of the drive cylinder. The movable steel frame is arranged parallel to the crossbeam. When the piston rod of the drive cylinder extends or retracts, it drives the movable steel frame to rise and fall synchronously in the vertical direction, so as to drive multiple pressing units to press towards or away from the workpiece as a whole.

[0013] Furthermore, two parallel small stainless steel square tubes are fixed between the two crossbeams. The small stainless steel square tubes extend along the length of the crossbeams, and their two ends are fixedly connected to the two crossbeams respectively. Air pipes communicating with multiple cylinders are inserted inside the small stainless steel square tubes, and the small stainless steel square tubes cover the outside of the air pipes.

[0014] Furthermore, the cooling and shaping fixture also includes a gas valve switch, which is fixed to one side of the cooling platform and connected to each cylinder through a gas pipe inserted in a small stainless steel square tube, for controlling the synchronous entry or exit of compressed gas into each cylinder.

[0015] The embodiments of the present invention have the following advantages: This invention uses a contour-following support plate to precisely contour and position the inner surface of the battery pack cover, and creates a cooling channel on the support plate that connects to the cooling air source. This allows the cooling airflow to evenly cover the entire lower surface of the battery pack cover, significantly improving cooling efficiency and temperature uniformity. Simultaneously, multiple clamping units arranged continuously along the outline of the workpiece frame provide independent elastic clamping force through elastic clamping components. This ensures that the contour-following blocks apply continuous and uniform flexible clamping constraints to the workpiece frame, avoiding stress concentration and product damage caused by rigid clamping. This effectively suppresses defects such as warping, deformation, delamination, and microcracks caused by uneven internal and external cooling rates and insufficient stress release during the cooling process, ensuring the dimensional accuracy, structural strength, and sealing performance of the battery pack cover. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 This is a three-dimensional structural diagram of the shaping tooling in an embodiment of the present invention. Figure 1 ; Figure 2This is a three-dimensional structural diagram of the shaping tooling in an embodiment of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of the shaping tooling in an embodiment of the present invention.

[0019] In the picture: 1-Cooling platform; 101-Aluminum plate; 102-Wheel caster; 103-Void; 2- Contouring support plate; 201- Cooling flow channel; 202- Cooling fan; 3-Support column; 301-Crossbeam; 302-Cylinder; 303-Modible steel frame; 304-Small stainless steel square tube; 4-Clamping unit; 401-Spring screw; 402-Long strip aluminum block; 403-Long strip contoured nylon block. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-3 As shown, a cooling and shaping fixture for a down-pressing battery pack cover includes a cooling platform 1, an aluminum plate 101 fixedly mounted on the cooling platform 1, a contour support plate 2 mounted above the aluminum plate 101, a cooling air source mounted below the contour support plate 2, a frame fixedly mounted on the cooling platform 1, and multiple pressing units 4 mounted on the frame and movable up and down.

[0022] Specifically, the cooling platform 1 is the basic load-bearing component of the entire tooling, and its bottom can be equipped with casters 102 to facilitate the overall movement and position adjustment of the tooling. An aluminum plate 101 is fixedly laid on the cooling platform 1. The aluminum plate 101 has good thermal conductivity and structural strength, serving as both the mounting base for the contour support plate 2 and the transition and conduction component for the cooling airflow.

[0023] The contour support plate 2 is fixedly installed on the upper surface of the aluminum plate 101, and its bottom surface is in close contact with the upper surface of the aluminum plate 101.

[0024] Preferably, the contour support plate 2 is made of contour nylon sheet material. Nylon material has good wear resistance, mechanical strength and processing performance, and is easy to form precisely by CNC machining. The shape of the upper surface of the contour support plate 2 is perfectly matched with the inner surface contour of the battery pack cover to be cooled and shaped. That is, the upper surface of the contour support plate 2 is a contour surface that is consistent with the shape of the inner wall of the battery pack cover. When the battery pack cover is placed on the contour support plate 2, the inner surface of the battery pack cover and the upper surface of the contour support plate 2 form a surface contact fit, realizing precise contour positioning of the inner contour of the workpiece.

[0025] Multiple cooling channels 201 are formed on the upper surface of the contour support plate 2. Each cooling channel 201 is a gas passage recessed into the upper surface of the contour support plate 2. These channels are interconnected in the bottom region of the contour support plate 2 and distributed along the inner surface contour of the battery pack cover on the upper surface of the contour support plate 2. An air inlet corresponding to and connected to the cooling channels 201 is located at the bottom of the contour support plate 2. The cooling channels 201 are connected to a cooling air source located below the contour support plate 2 to guide the cooling airflow to the entire lower surface of the battery pack cover. The specific shape and distribution of the cooling channels 201 are designed according to the inner surface contour of the battery pack cover to ensure that the cooling airflow can cover the entire area of ​​the lower surface of the workpiece, avoiding cooling dead zones.

[0026] The aluminum plate 101 is provided with an airflow channel through which cooling airflow passes from the cooling air source to the bottom of the contour support plate 2.

[0027] In one specific implementation of this embodiment, the airflow channel is a central cavity 103 connecting the cooling platform 1 and the aluminum plate 101. The area of ​​the cavity 103 is smaller than the area of ​​the aluminum plate 101, that is, the cavity 103 is a window structure opened in the middle area between the cooling platform 1 and the aluminum plate 101, and the four edges of the aluminum plate 101 are still fixedly connected to the cooling platform 1. An internal support frame formed by overlapping stainless steel square tubes is provided inside the cavity 103. The upper end face of the support frame is fixedly connected to the lower surface of the aluminum plate 101, and the lower end face is fixedly connected to the upper surface of the cooling platform 1. The support frame forms a rigid support between the aluminum plate 101 and the cooling platform 1, transferring the workpiece pressure and the downward pressure of the clamping unit 4 borne by the aluminum plate 101 and the contour support plate 2 to the cooling platform 1, preventing the aluminum plate 101 from deforming due to excessive force. On the other hand, the support frame adopts a square tube staggered overlap structure, and the gaps between the square tubes allow the cooling airflow to pass freely without significantly obstructing the airflow, ensuring that the cooling airflow passes through without obstruction.

[0028] The cooling air source consists of multiple cooling fans 202 installed on the cooling platform 1 and located below the contour support plate 2. The air outlets of the cooling fans 202 are vertically aligned with the openings 103 in the aluminum plate 101, meaning the air outlets of the cooling fans 202 face the openings of the openings 103, allowing the cooling airflow generated by the cooling fans 202 to directly reach the bottom of the contour support plate 2 through the openings 103. Because the bottom surface of the contour support plate 2 is in close contact with the upper surface of the aluminum plate 101, the airflow reaching the bottom of the contour support plate 2 through the openings 103 is constrained and enters the bottom inlet of the cooling channel 201. Then, it diffuses and flows along the cooling channel 201 on the upper surface of the contour support plate 2, exchanging heat with the lower surface of the battery pack cover placed on the contour support plate 2, thus achieving uniform air cooling of the lower surface of the workpiece.

[0029] The frame is fixedly mounted on the cooling platform 1 to support and install the clamping unit 4.

[0030] Specifically, the frame includes support columns 3 fixed at the four corners of the cooling platform 1, and crossbeams 301 connected to the tops of adjacent support columns 3. The support columns 3 are vertically fixed to the cooling platform 1, and the crossbeams 301 are connected to the tops of the support columns 3 and form a rectangular frame. The four support columns 3 are located at the four corners of the cooling platform 1, providing stable support for the entire frame.

[0031] Multiple drive cylinders 302 are fixedly mounted on the crossbeam 301. The piston rods of the drive cylinders 302 extend vertically downwards, and their lower ends are fixedly connected to a movable steel frame 303. The movable steel frame 303 is arranged parallel to the crossbeam 301, located below the crossbeam 301, and can be raised and lowered vertically as a whole under the drive of the drive cylinders 302. When the piston rods of the drive cylinders 302 extend synchronously, they drive the movable steel frame 303 to move downwards; when the piston rods of the drive cylinders 302 retract synchronously, they drive the movable steel frame 303 to move upwards.

[0032] Two parallel small stainless steel square tubes 304 are fixed between the two crossbeams 301. The small stainless steel square tubes 304 extend along the length of the crossbeams 301, with both ends fixedly connected to the two crossbeams 301 respectively. Air pipes communicating with multiple drive cylinders 302 are threaded through the small stainless steel square tubes 304. The small stainless steel square tubes 304 cover the air pipes, providing protection and support, preventing mechanical damage or entanglement of the air pipes during use. The fixture also includes an air valve switch (not shown in the figure), fixed to one side of the cooling platform 1. The air valve switch communicates with each drive cylinder 302 through the air pipes threaded through the small stainless steel square tubes 304, controlling the synchronous entry or exit of compressed gas into or out of each drive cylinder 302, thereby achieving synchronous operation of multiple drive cylinders 302 and ensuring smooth lifting and lowering of the movable steel frame 303.

[0033] Multiple clamping units 4 are continuously arranged along the outer frame contour of the battery pack cover and fixedly installed on the lower surface of the movable steel frame 303. Specifically, multiple clamping units 4 are installed at intervals on the lower surface of the movable steel frame 303 along the extension direction of the outer frame contour of the workpiece, and the arrangement trajectory of each clamping unit 4 is consistent with the shape of the outer frame of the battery pack cover.

[0034] Each clamping unit 4 includes a spring screw 401, an elongated aluminum block 402 fixed to the lower end of the spring screw 401, and an elongated shaped nylon block 403 fixed to the lower surface of the elongated aluminum block 402. The spring screw 401 is vertically arranged between the movable steel frame 303 and the elongated aluminum block 402, with its lower end fixedly connected to the elongated aluminum block 402 and its upper end connected to the movable steel frame 303.

[0035] The spring screw 401 is a telescopic rod structure with a built-in compression spring. When subjected to axial pressure, the compression spring undergoes elastic deformation, providing elastic clamping force to the clamping unit 4. The elongated aluminum block 402 serves as an intermediate force transmission component, uniformly transmitting the elastic force of the spring screw 401 to the elongated contoured nylon block 403. The lower surface shape of the elongated contoured nylon block 403 matches the outer frame contour of the battery pack cover; that is, the lower surface of the elongated contoured nylon block 403 is a contoured surface that matches the upper surface shape of the outer frame of the battery pack cover. The elongated contoured nylon blocks 403 are continuously arranged along the outer frame of the workpiece, forming a clamping band that perfectly matches the outer frame contour of the workpiece.

[0036] Each clamping unit 4 has an independent spring screw 401, meaning that the compression spring of each clamping unit 4 works independently without interference. During the downward pressing of the movable steel frame 303, the compression spring of each spring screw 401 generates different compression amounts according to the actual height of the workpiece outer frame at the corresponding position. Since the shrinkage and height of different areas of the battery pack cover may have slight differences during the cooling process, each clamping unit 4 can independently adjust the clamping force applied to the workpiece outer frame. When the height of the workpiece outer frame at a certain position is too high, the compression amount of the corresponding spring screw 401 increases, and the elastic force increases accordingly; when the height of the workpiece outer frame at a certain position is too low, the compression amount of the corresponding spring screw 401 decreases, and the elastic force decreases accordingly. Through this adaptive adjustment mechanism, each clamping unit 4 can apply a relatively uniform flexible clamping force at each point on the workpiece outer frame, achieving continuous, uniform, and flexible clamping constraint on the workpiece outer frame, which ensures positioning reliability and avoids stress concentration and product surface damage caused by rigid clamping.

[0037] The working process of this fixture is as follows: First, the battery pack cover, which has just been molded and is still at a high temperature, is removed from the mold and placed on the contour support plate 2. Since the upper surface of the contour support plate 2 precisely matches the inner surface contour of the battery pack cover, the inner surface of the battery pack cover and the upper surface of the contour support plate 2 form a surface contact fit, achieving the initial positioning of the workpiece.

[0038] Subsequently, the operator activates the air valve switch, and compressed gas enters each drive cylinder 302 simultaneously through the air pipe inside the small stainless steel square tube 304. The piston rods of each drive cylinder 302 extend synchronously, pushing the movable steel frame 303 downward. The movable steel frame 303 drives the multiple pressing units 4 on its lower surface to move downward as a whole. When the elongated contoured nylon blocks 403 at the lower end of each pressing unit 4 contact the upper surface of the outer frame of the battery pack cover, the movable steel frame 303 continues to press down a certain stroke, causing the compression springs inside each spring screw 401 to compress and deform.

[0039] During this process, since each spring screw 401 works independently, the spring compression of each clamping unit 4 is automatically adjusted according to the actual height of the workpiece frame at the corresponding position. For example, if a certain area of ​​the workpiece frame has a slightly higher molding tolerance, the elongated nylon block 403 at that location will contact the workpiece earlier, and the compression of the corresponding spring screw 401 will be relatively larger; conversely, if a certain area of ​​the workpiece frame is slightly lower, the compression of the corresponding spring screw 401 will be relatively smaller. Ultimately, each clamping unit 4 applies a relatively uniform clamping force at each point on the workpiece frame, achieving continuous and uniform flexible clamping constraint on the workpiece frame.

[0040] As the pressing unit 4 is pressed into place, multiple cooling fans 202 located below the contour support plate 2 are activated. The cooling airflow generated by the cooling fans 202 blows upwards, passing through the cooling platform 1 and the holes 103 in the aluminum plate 101 to reach the bottom of the contour support plate 2. Because the bottom surface of the contour support plate 2 is in close contact with the upper surface of the aluminum plate 101, the cooling airflow cannot leak from the gap between the bottom surface of the contour support plate 2 and the aluminum plate 101, and is constrained to enter the bottom inlet of the cooling channel 201 opened on the upper surface of the contour support plate 2. The cooling airflow flows along the cooling channel 201 on the upper surface of the contour support plate 2, evenly covering the entire lower surface of the battery pack cover, and undergoes forced convection heat exchange with the high-temperature workpiece, carrying away the heat from the workpiece.

[0041] The interconnected structure of multiple cooling channels 201 ensures that the cooling airflow is evenly distributed across all areas of the upper surface of the contour support plate 2, avoiding localized airflow short-circuiting or dead zones. The number and arrangement of the cooling fans 202 are determined based on the area of ​​the contour support plate 2 and the cooling requirements. Preferably, multiple fans are arranged in an array, with each fan corresponding to a cooling area, to ensure that the entire lower surface of the workpiece is adequately cooled.

[0042] During the cooling process, the battery pack cover gradually cools down from a high temperature. As the temperature decreases, the workpiece material shrinks, and the amount of shrinkage varies in different areas due to temperature distribution and material anisotropy. At this time, the spring screws 401 of each clamping unit 4 can automatically adapt to the shrinkage deformation of the workpiece: when the height of a certain area of ​​the workpiece decreases due to shrinkage, the compression of the corresponding spring screw 401 decreases accordingly, but still maintains an appropriate clamping force; when the workpiece tends to warp locally due to uneven shrinkage, the elastic force of the spring screw 401 can provide conformal constraint and suppress warping deformation. At the same time, the contour support plate 2 provides stable internal support for the workpiece through surface contact between its upper surface and the inner surface of the workpiece, preventing the workpiece from undergoing concave deformation due to gravity or shrinkage stress during the cooling process.

[0043] Therefore, it can be seen that during the cooling process, the contour support plate 2 and the clamping unit 4 work together. The contour support plate 2 provides contour positioning and support for the inner surface, and achieves uniform and efficient air cooling through the cooling channel 201, eliminating the thermal stress driving force of deformation from the perspective of temperature field homogenization. The clamping unit 4, through continuous and uniform flexible clamping constraints, resists the shape instability caused by residual stress release from the perspective of mechanical constraints. The two work together to keep the workpiece in a controlled state throughout the entire cooling process, ensuring both the cooling rate and temperature uniformity, and maintaining the shape stability of the workpiece.

[0044] After cooling is complete, turn off the cooling fan 202, operate the air valve switch to synchronously retract the piston rods of each drive cylinder 302, move the movable steel frame 303 upward, and disengage each clamping unit 4 from the workpiece outer frame. At this point, the cooled and shaped battery pack cover can be removed from the contour support plate 2 for subsequent processes.

[0045] In summary, the pressure-type battery pack cover cooling and shaping fixture provided in this embodiment achieves efficient and uniform cooling through the cooperation of the contour support plate 2, the cooling channel 201, and the cooling fan 202. It also achieves continuous and uniform flexible pressing through multiple independent elastic pressing units 4. Through the synergistic effect of the two, it effectively solves the technical problems that are prone to occur during the cooling process after the composite material battery pack cover is molded, such as warping, deformation, dimensional deviation, delamination, and microcracks. This significantly improves the dimensional accuracy, structural strength, and sealing reliability of the product.

[0046] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cooling and shaping fixture for a pressure-type battery pack cover, characterized in that, It includes a cooling platform (1), on which an aluminum plate (101) is fixedly provided, and on which a contoured support plate (2) and a cooling air source located below the contoured support plate (2) are fixedly provided. On the cooling platform (1), a frame is fixedly provided, and on the frame are multiple pressing units (4) that can move up and down. The upper surface shape of the contour support plate (2) matches the inner surface contour of the battery pack cover, and a cooling channel (201) connected to the cooling air source is provided on the contour support plate (2) to guide the cooling airflow to the entire lower surface of the battery pack cover. The aluminum plate (101) is provided with an airflow channel through which cooling airflow passes from the cooling air source to the bottom of the contour support plate (2); Multiple clamping units (4) are continuously arranged along the outer frame contour of the battery pack cover. Each clamping unit (4) includes an elastic clamping element and a contouring block. The shape of the lower surface of the contouring block matches the outer frame contour of the battery pack cover. The elastic clamping element provides an independent elastic clamping force for each clamping unit (4), so that multiple contouring blocks together apply continuous and uniform flexible clamping constraints to the outer frame of the battery pack cover.

2. The pressure-type battery pack cover cooling and shaping fixture according to claim 1, characterized in that, The contour support plate (2) is a contour nylon plate, which is fixedly installed on the aluminum plate (101). The bottom surface of the contour support plate (2) is closely attached to the upper surface of the aluminum plate (101) so that the airflow reaching the bottom of the contour support plate through the airflow channel is constrained to enter the cooling channel (201).

3. The pressure-type battery pack cover cooling and shaping fixture according to claim 2, characterized in that, The cooling channel (201) consists of multiple gas channels that are opened on the upper surface of the contoured nylon plate and are interconnected. Each gas channel is interconnected in the bottom area of ​​the contoured support plate (2). After the airflow enters from the bottom of the contoured support plate (2), it is diverted to each gas channel through the interconnected structure.

4. The cooling and shaping fixture for a pressure-type battery pack cover according to claim 1, characterized in that, The cooling air source is a plurality of cooling fans (202) installed on the cooling platform (1) and located below the contour support plate (2). The air outlet of the cooling fan (202) and the airflow channel on the aluminum plate (101) are arranged opposite each other in the vertical direction so that the airflow generated by the cooling fan can directly reach the bottom of the contour support plate (2) through the airflow channel.

5. The cooling and shaping fixture for a pressure-type battery pack cover according to claim 1, characterized in that, The airflow channel is a central cavity (103) that connects the cooling platform (1) and the aluminum plate (101), and the area of ​​the cavity (103) is smaller than the area of ​​the aluminum plate (101). The cavity (103) is provided with an internal support frame formed by overlapping stainless steel square tubes. The upper end face of the support frame is fixedly connected to the lower surface of the aluminum plate (101), and the lower end face is fixedly connected to the upper surface of the cooling platform (1) to form a rigid support between the aluminum plate (101) and the cooling platform (1) and transfer the load borne by the aluminum plate to the cooling platform, while ensuring that the cooling airflow passes through without obstruction.

6. The cooling and shaping fixture for a pressure-type battery pack cover according to claim 1, characterized in that, The frame includes support columns (3) fixed at the four corners of the cooling platform (1) and crossbeams (301) connected to the top of adjacent support columns (3). The support columns (3) are vertically fixed to the cooling platform (1), and the crossbeams (301) are connected to the top of the support columns (3) and form a rectangular frame. Multiple drive cylinders (302) are fixedly installed on the crossbeam (301). A movable steel frame (303) is fixedly installed at the lower end of the piston rod of the drive cylinder (302). The movable steel frame (303) is arranged parallel to the crossbeam (301). When the piston rod of the drive cylinder (302) extends and retracts, it drives the movable steel frame (303) to rise and fall synchronously in the vertical direction, so as to drive multiple pressing units (4) to press towards or away from the workpiece as a whole.

7. The pressure-type battery pack cover cooling and shaping fixture according to claim 6, characterized in that, Multiple clamping units (4) are spaced apart on the lower surface of the movable steel frame (303) along the extension direction of the workpiece outer frame contour; Each clamping unit (4) includes a spring screw (401), a long strip aluminum block (402) fixed to the lower end of the spring screw (401), and a long strip contour nylon block (403) fixed to the lower surface of the long strip aluminum block (402). The shape of the lower surface of the long strip contour nylon block (403) matches the outline of the outer frame of the workpiece to be worked. The spring screw (401) is vertically arranged between the movable steel frame (303) and the long strip aluminum block (402). Its lower end is fixedly connected to the long strip aluminum block (402), and its upper end is connected to the movable steel frame (303). Each long strip nylon block (403) is continuously arranged along the outer frame of the workpiece to form a pressing band that matches the outline of the outer frame of the workpiece. During the pressing down of the movable steel frame (303), the compression springs of each spring screw (401) generate different compression amounts according to the actual height of the workpiece outer frame at the corresponding position, so that each clamping unit (4) independently adjusts the clamping force applied to the workpiece outer frame, so as to apply a flexible clamping force that tends to be consistent at each point of the workpiece outer frame.

8. The pressure-type battery pack cover cooling and shaping fixture according to claim 6, characterized in that, Two parallel small stainless steel square tubes (304) are fixed between the two crossbeams (301). The small stainless steel square tubes (304) extend along the length of the crossbeams (301), and their two ends are fixedly connected to the two crossbeams (301) respectively. The small stainless steel square tube (304) is equipped with an air pipe that communicates with multiple cylinders (302), and the small stainless steel square tube (304) covers the outside of the air pipe.

9. A cooling and shaping fixture for a pressure-type battery pack cover according to claim 6 or 8, characterized in that, The cooling and shaping fixture also includes a gas valve switch, which is fixed on one side of the cooling platform (1) and connected to each cylinder (302) through a gas pipe inserted in a small stainless steel square tube (304) to control the synchronous entry or exit of compressed gas into each cylinder (302).

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