Automobile battery box machining die

Abstract

The utility model discloses an automobile battery box processing mould which comprises a machine frame, an upper pressing mould, a lower pressing mould, a driving unit and a vacuum air suction device, the vacuum air suction device comprises a vacuum pump, an air suction main through hole and an air suction auxiliary through hole, and one end of the air suction auxiliary through hole extends to the upper end face of the lower pressing mould. One end of the air suction main through hole extends to the outer side face of the lower pressing die and communicates with the vacuum pump, and the other end of the air suction main through hole communicates with the other end of the air suction auxiliary through hole. In the downward pressing forming process of the aluminum-plastic film, the vacuum pump is started, suction force is generated on the outer edges of the two ends of the upper surface of the downward pressing mold through the main air suction through holes and the auxiliary air suction through holes, and air left between the forming groove and the aluminum-plastic film is sucked; the problem that the lower peripheral edge cannot be completely unfolded when the aluminum plastic film is formed due to the fact that air remains in the forming groove is solved; and meanwhile, as air in the forming groove is sucked, vacuum is formed between the forming groove and the aluminum plastic film, and the aluminum plastic film can be completely unfolded at the bottom of the forming groove more conveniently during forming.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, specifically to a processing mold for automotive battery boxes. Background Technology

[0002] Secondary batteries, also known as rechargeable batteries or accumulators, are batteries that can be recharged after discharge to reactivate the active materials and continue to be used. Pouch batteries are lithium-ion (or polymer) batteries that use a flexible aluminum-plastic composite film as their casing. Due to their lightweight, high energy density, and flexible shape design, they are widely used in consumer electronics, new energy vehicles, and energy storage. With the large-scale promotion and use of new energy vehicles, pouch batteries are widely used in electric vehicles and hybrid vehicles.

[0003] Typically, the manufacturing process of a pouch cell involves: first, separating the positive and negative electrodes with a separator to form multiple battery cells; then, stacking the multiple battery cells to form an electrode assembly; and finally, encapsulating the electrode assembly in an aluminum-plastic film battery case.

[0004] The manufacturing of aluminum-plastic film battery box shells typically involves forming using a molding die. In existing technologies, the molding die for aluminum-plastic film battery boxes includes an upper die and a lower die. The aluminum-plastic film used to make the battery box shell is placed in the lower die, and the upper die presses down and fits against the lower die, forming the shell in a forming groove formed by the upper and lower films. However, during the manufacturing process of the aluminum-plastic film battery box shell using the above molding die, air may remain at the corners of the aluminum-plastic film and the mold cavity of the lower die. During the extrusion forming process between the upper and lower dies, this air cannot be expelled in time, causing the aluminum-plastic film to not fully extend at the lower periphery of the forming groove. Furthermore, the residual air is compressed to form high-pressure air. When the pressure is released after the aluminum-plastic film is formed, this compressed high-pressure air expands, and the expanded air is very likely to cause pits or wrinkles at the corners of the aluminum-plastic film battery box. Utility Model Content

[0005] To address the problem that residual air in the forming groove of the mold cavity during the stamping process of existing aluminum-plastic film battery boxes prevents the aluminum-plastic film from fully extending at the lower periphery of the forming groove, this utility model provides a processing mold for automotive battery boxes.

[0006] To solve the above-mentioned technical problems, this utility model provides a processing mold for an automotive battery box, including a frame, an upper mold, a lower mold, and a drive unit. The drive unit is connected to the upper mold and also includes a vacuum suction device. The vacuum suction device includes a vacuum pump, a main suction port, and a pair of auxiliary suction ports. The pair of auxiliary suction ports are respectively disposed on opposite sides of the lower mold. One end of the auxiliary suction port extends to the upper end face of the lower mold, one end of the main suction port extends to the outer side of the lower mold and is connected to the vacuum pump, and the other end of the main suction port extends into the interior of the lower mold and is connected to the other end of the pair of auxiliary suction ports.

[0007] In an embodiment of this utility model, a lifting device is also included. The lifting device includes a pair of lifting cylinders and a lifting plate. The pair of lifting cylinders are installed inside the lower mold, and the lifting plate is horizontally installed inside the cavity of the lower mold. The lifting plate and the inner wall of the cavity of the lower mold form a lifting and sliding connection. The pair of lifting cylinders are fixedly connected to the bottom end of the lifting plate. The lifting plate has a pair of suction holes that are respectively aligned with the positions of a pair of suction auxiliary through holes. The suction holes are through holes that pass through from top to bottom.

[0008] In an embodiment of this utility model, four sets of peripheral cylinder pressing devices are also included. The four sets of peripheral cylinder pressing devices are arranged at intervals along the circumferential direction above the lower die. The peripheral cylinder pressing device includes a pressing cylinder and a lower pressing head. The piston rod of the pressing cylinder is connected to the lower pressing head. The lower pressing head cooperates with the outer edge boss of the lower die to press the outer edge of the stamped aluminum-plastic film shell.

[0009] In an embodiment of this utility model, an intermediate connecting seat is also included. The intermediate connecting seat is horizontally fixedly installed on the upper part of the frame, and the clamping cylinder is fixedly installed on the intermediate connecting seat.

[0010] In an embodiment of this utility model, the vacuum suction device further includes a connecting channel, which is disposed inside the lower mold. The two opposite ends of the connecting channel are respectively connected to the other end of a pair of suction auxiliary through holes, and the other end of the suction main through hole is connected to the connecting channel.

[0011] In an embodiment of this utility model, the air intake hole includes an upper air intake hole connecting part and a lower air intake hole connecting part. The upper air intake hole connecting part is located above the lower air intake hole connecting part and is connected to the lower air intake hole connecting part. The opening size of the upper air intake hole connecting part is smaller than the opening size of the lower air intake hole connecting part.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] By employing the aforementioned automotive battery box processing mold, a vacuum suction device is installed in the forming groove formed by the upper and lower molds. During the process of pressing the aluminum-plastic film placed on the upper surface of the lower mold by the upper mold, the vacuum pump is turned on and generates suction at the outer edges of both ends of the upper surface of the lower mold through the main suction hole and a pair of secondary suction holes. This suction removes the air remaining between the forming groove and the aluminum-plastic film, solving the problem that the lower edge of the aluminum-plastic film cannot be fully unfolded during forming due to residual air in the forming groove. At the same time, as the air in the forming groove is sucked out, a vacuum is formed between the forming groove and the aluminum-plastic film. The formation of the vacuum environment makes it easier for the aluminum-plastic film to fully unfold at the bottom of the forming groove during forming. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a three-dimensional structural diagram of the automotive battery box processing mold in the embodiments of this application.

[0016] Figure 2 This is a side view structural diagram of the automotive battery box processing mold in the embodiments of this application.

[0017] Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure.

[0018] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the diagram.

[0019] Figure 5 This is a schematic diagram of the structure in which the aluminum-plastic film of the battery box is placed on the lower mold in an embodiment of this application.

[0020] Figure 6 This is a schematic diagram illustrating the structural principle of the upper and lower die stamping the aluminum-plastic film of the battery box in the embodiments of this application.

[0021] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point C.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Automotive battery box processing mold;

[0024] 20-Aluminum-Plastic Film;

[0025] 100-rack;

[0026] 200-Drive Unit;

[0027] 300 - Upper mold;

[0028] 400 - Lower compression die;

[0029] 500 - Peripheral cylinder clamping device; 501 - Clamping cylinder; 502 - Lower pressure head;

[0030] 600 - Vacuum suction device, 601 - Main suction port, 602 - Secondary suction port, 603 - Connecting channel;

[0031] 700-Intermediate Connector;

[0032] 800 - Forming groove;

[0033] 900 - Lifting device, 901 - Lifting cylinder, 902 - Intake port, 9021 - Upper intake port connection, 9022 - Lower intake port connection. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0035] Please refer to the appendix. Figure 1 To be continued Figure 3 As shown, this embodiment provides an automotive battery box processing mold 10, including a frame 100, an upper mold 300, a lower mold 400, a drive unit 200, and a vacuum suction device 600.

[0036] See attached document Figure 1 To be continued Figure 3 As shown, the drive unit 200 is mounted on the top of the frame 100. The drive unit 200 can be either a pneumatic cylinder or a hydraulic cylinder. In this embodiment, the drive unit 200 is preferably a hydraulic cylinder.

[0037] An upper die 300 is positioned on the upper part of the frame 100, and a lower die 400 is positioned on the lower part of the frame 100. The upper die 300 and the lower die 400 are positioned opposite each other vertically. The upper die 300 is slidably mounted on the frame 100, forming a lifting and sliding connection with the frame 100. A drive unit 200 is connected to the upper die 300 and is used to drive the upper die 300 to lift and slide. The lower die 400 is fixedly mounted on the frame 100. The upper die 300 has a stamping head, and the lower die 400 has a forming groove 800. The upper die 300 and the lower die 400 cooperate to stamp and form the aluminum-plastic film battery box.

[0038] See attached document Figure 3 and attached Figure 4As shown, the vacuum suction device 600 is arranged inside the lower die 400. The function of the vacuum suction device 600 is to suck up any residual air in the forming groove 800 of the lower die 400, so as to prevent the aluminum-plastic film 20 from failing to unfold its lower peripheral edge during the stamping process due to the air remaining in the forming groove 800 not being able to be discharged.

[0039] Specifically, the vacuum suction device 600 includes a vacuum pump, a main suction port 601, and a pair of auxiliary suction ports 602. The pair of auxiliary suction ports 602 are arranged inside the lower die 400. For example, the pair of auxiliary suction ports 602 are arranged symmetrically on the left and right sides inside the lower die 400. The auxiliary suction ports 602 are located at the center of the outer edge of the lower die 400. In this way, the auxiliary suction ports 602 can generate the same suction force on the area at the corners of the front and rear ends of the forming groove 800 of the lower die 400, and suck up the residual air that is easily concentrated and left at the corners during the stamping of the aluminum-plastic film 20.

[0040] In this embodiment, the suction secondary through hole 602 is a vertically arranged through hole structure. The upper end of the suction secondary through hole 602 extends to the upper surface of the lower mold 400, that is, the upper end of the suction secondary through hole 602 is connected to the forming groove 800 of the lower mold 400, and the lower end of the suction secondary through hole 602 extends vertically into the interior of the lower mold 400.

[0041] Continue to refer to the appendix Figure 3 and attached Figure 4 As shown, the main suction port 601 is horizontally set inside the lower pressure mold 400. One end of the main suction port 601 extends horizontally into the interior of the lower pressure mold 400 and is connected to the lower end of a pair of auxiliary suction ports 602. The other end of the main suction port 601 extends horizontally to the outside of the lower pressure mold 400 and is connected to the external vacuum pump.

[0042] See attached document Figure 3 and attached Figure 4 As shown, in some embodiments, the vacuum suction device 600 further includes a connecting channel 603, which is arranged between the lower ends of a pair of suction auxiliary through holes 602. The opposite ends of the connecting channel 603 are respectively connected to the lower ends of the suction auxiliary through holes 602, while one end of the suction main through hole 601 is connected to the middle part of the connecting channel 603. In this way, after the vacuum pump is turned on, the vacuum pump can generate suction at the bottom of the forming groove 800 of the lower pressure mold 400 through the suction main through hole 601, the connecting channel 603 and the pair of suction auxiliary through holes 602.

[0043] By adopting the above structure, during the pressing and forming process of the aluminum-plastic film 20 by the upper mold 300, the vacuum pump is turned on and generates suction at the outer edges of both ends of the upper surface of the lower mold 400 through the main suction hole 601 and a pair of secondary suction holes 602, which sucks up the air remaining between the forming groove 800 and the aluminum-plastic film 20, solving the problem that the lower edge of the aluminum-plastic film 20 cannot be fully unfolded during the forming process due to the air remaining in the forming groove 800; at the same time, as the air in the forming groove 800 is sucked up, a vacuum is formed between the forming groove 800 and the aluminum-plastic film 20. The formation of the vacuum environment makes it more convenient for the aluminum-plastic film 20 to be fully unfolded at the bottom of the forming groove 800 during the forming process.

[0044] Continue to refer to the appendix Figure 3 and attached Figure 4 As shown, the automotive battery box processing mold in this embodiment also includes a lifting device 900. The lifting device 900 includes a pair of lifting cylinders 901 and a lifting plate. The pair of lifting cylinders 901 are installed in the lower mold 400. The lifting plate is horizontally installed in the cavity (forming groove 800) of the lower mold 400. The lifting plate and the inner wall of the cavity of the lower mold 400 form a lifting sliding connection. The pair of lifting cylinders 901 are fixedly connected to the bottom end of the lifting plate. The lifting plate has a pair of suction holes 902 that are respectively aligned with the positions of a pair of suction auxiliary through holes 602. The suction holes 902 are through holes that pass through from top to bottom.

[0045] See attached document Figure 5 To be continued Figure 7As shown, during the stamping process, the aluminum-plastic film 20 is laid flat and attached to the upper surface of the lifting plate. The upper die 300 moves down to press and contact the aluminum-plastic film 20. The lifting cylinder 901 drives the lifting plate to move down synchronously with the upper die 300. During the process of the lifting plate descending along the forming groove 800 in the lower die 400, the vacuum pump is turned on to extract the air in the area between the lifting plate and the forming groove 800, as well as any air that may exist between the lifting plate and the aluminum-plastic film 20. The lifting device 900 is designed so that, since the aluminum-plastic film 20 is laid flat on the upper surface of the lifting plate, during the pressing process, the outer edge of the aluminum-plastic film is in contact with the inner wall of the forming groove 800. This causes the air in the forming groove 800 to move downwards, prompting the air to be discharged outwards from the suction port 602 at the bottom of the forming groove 800. This allows for more thorough extraction of any residual air between the aluminum-plastic film 20 and the forming groove 800 when the aluminum-plastic film 20 is finally pressed and formed, which helps to eliminate any residual air in the forming groove 800. This avoids the problem that, during the pressing process of the existing pressing mold 400, air located in the forming groove 800 may escape to the upper area between the outer wall of the aluminum-plastic film 20 and the groove wall of the forming groove 800, resulting in incomplete air extraction. In addition, the lifting device 900 is designed so that after the aluminum-plastic film 20 is stamped, the lifting cylinder 901 pushes the lifting plate upward to lift the stamped aluminum-plastic film battery box upward for easy removal.

[0046] See attached document Figure 1 As shown, to ensure the stability of the aluminum-plastic film 20 during the pressing and molding process, in this embodiment, the automotive battery box processing mold further includes four sets of peripheral cylinder clamping devices 500. These four sets of peripheral cylinder clamping devices 500 are arranged circumferentially above the lower die. Each peripheral cylinder clamping device 500 includes a clamping cylinder 501 and a lower pressing head 502. The piston rod of the clamping cylinder 501 is connected to the lower pressing head 502, and the lower pressing head 502 cooperates with the outer edge boss of the lower die 400 to clamp the outer edge of the stamped aluminum-plastic film 20 shell. (Refer to the attached diagram.) Figure 1 To be continued Figure 3 As shown, an intermediate connecting seat 700 is installed on the upper part of the frame 100, and the clamping cylinder 501 is fixedly installed on the intermediate connecting seat 700.

[0047] To better extract residual air remaining in the molding tank 800, please refer to the attached document. Figure 3 and attached Figure 4As shown, the air intake 902 includes an upper air intake connection portion 9021 and a lower air intake connection portion 9022. The upper air intake connection portion 9021 is located above the lower air intake connection portion 9022. The upper air intake connection portion 9021 is connected to the lower air intake connection portion 9022. The opening size of the upper air intake connection portion 9021 is smaller than the opening size of the lower air intake connection portion 9022.

[0048] By making the upper opening size of the suction hole smaller than the lower opening size, when the air in the forming groove 800 is drawn in through the suction hole, a negative pressure will be generated at the upper part of the suction hole (the narrow opening design of the upper suction hole), which will cause the air in the forming groove 800 to be drawn into the suction auxiliary through hole 602 more efficiently.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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. "Above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top," and "on the surface" 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. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature, and therefore should not be construed as a limitation of this utility model.

[0050] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automobile battery box processing die comprising a frame, an upper die, a lower die, and a driving unit connected to the upper die, characterized in that, The vacuum suction device comprises a vacuum pump, a main suction hole and a pair of auxiliary suction holes, the pair of auxiliary suction holes are arranged on opposite sides of the lower pressing die, one end of the auxiliary suction hole extends to the upper end surface of the lower pressing die, one end of the main suction hole extends to the outer side surface of the lower pressing die and is connected with the vacuum pump, and the other end of the main suction hole extends to the inside of the lower pressing die and is connected with the other end of the pair of auxiliary suction holes.

2. The automobile battery box processing die according to claim 1, wherein, The jacking device comprises a pair of jacking cylinders and a jacking plate, the pair of jacking cylinders are installed in the lower pressing die, the jacking plate is horizontally installed in the cavity of the lower pressing die, the jacking plate is connected with the inner wall of the cavity of the lower pressing die in a lifting and sliding manner, the bottom end of the jacking plate is fixedly connected with the pair of jacking cylinders, the jacking plate is provided with a pair of suction holes which are aligned with the positions of the pair of auxiliary suction holes, and the suction holes are through holes.

3. The automobile battery box processing die according to claim 1 or 2, characterized in that, The four sets of peripheral cylinder pressing devices are arranged above the lower pressing die in a circumferential direction, the peripheral cylinder pressing device comprises a pressing cylinder and a pressing head, the piston rod of the pressing cylinder is connected with the pressing head, and the pressing head is matched with the outer edge boss of the lower pressing die to press the outer edge of the aluminum plastic film shell formed by stamping.

4. The automobile battery box processing die according to claim 3, characterized in that, The intermediate connecting seat is horizontally and fixedly installed on the upper part of the rack, and the pressing cylinder is fixedly installed on the intermediate connecting seat.

5. The automobile battery box processing die according to claim 1, wherein The vacuum suction device further comprises a connecting channel arranged in the inside of the lower pressing die, the opposite ends of the connecting channel are connected with the other ends of the pair of auxiliary suction holes, and the other end of the main suction hole is connected with the connecting channel.

6. The automobile battery box processing die according to claim 2, wherein The upper suction hole connecting portion is located above the lower suction hole connecting portion, the upper suction hole connecting portion is connected with the lower suction hole connecting portion, and the opening size of the upper suction hole connecting portion is smaller than that of the lower suction hole connecting portion.

Images