Automatic stamping equipment for lithium battery shell

Abstract

The invention provides automatic stamping equipment for a lithium battery shell, and belongs to the technical field of lithium battery processing. Comprising a rack, a lower die base and an upper pressing base are arranged on the inner side of the rack, a positioning assembly used for positioning a metal plate is arranged on the lower die base, a stamping block and a first receding block are arranged on the upper pressing base and the lower die base correspondingly, and the first receding block is installed in a stamping groove of the lower die base in a lifting mode; an upper forming block is vertically and slidably arranged on the upper pressing base and located on the outer side of the stamping block, a lower forming block is arranged on the lower die base and located on the periphery of the first receding block, and the male die of the reinforcing edge is arranged on the bottom wall of the upper forming block. The upper forming block and the lower forming block are matched to punch and form the reinforcing edges on the side plates of the plate, then the lower forming block is turned over to upwards turn the side plates to form the rough shape of the battery shell, and the punching block is pressed downwards to be matched with the first receding block to shape the battery shell. The device has the effects of reducing wrinkles formed in the process of punch forming of the lithium battery shell and improving the automatic machining efficiency of the battery shell.

Description

Technical Field

[0001] This invention relates to the field of lithium battery processing technology, and in particular to an automatic stamping equipment for lithium battery casings. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material. They achieve charging and discharging through the migration of lithium ions between the positive and negative electrodes, and offer advantages such as high energy density, long cycle life, and low self-discharge. With the continuous rise of new energy sources, lithium-ion batteries have been widely used in electric vehicles, new energy vehicles, and various portable devices.

[0003] For high-capacity lithium batteries, a safe casing is crucial. Common lithium battery casings are manufactured by stamping raw materials (such as steel and aluminum plates) to create a casing that meets the design requirements of the lithium battery. This process ensures the casing has sufficient strength and sealing to protect the internal structure of the battery and prevent external substances from entering. The lithium battery casing consists of a base plate and four side plates, forming a box with an open top. Flanged edges extend from the edges of two parallel side plates for welding connections. After the side plates are flipped to form the box, the flanges are bent to cover the adjacent side plates. The overlapping flanges and side plates are then welded together to form a structurally stable new energy battery casing.

[0004] For lithium batteries that are frequently used outdoors and removed from electrical equipment, surface resistance to impact and puncture is essential. Therefore, the surface of the lithium battery casing can be enhanced by designing strip-shaped and protruding ridges to improve its impact and puncture resistance. However, conventional stamping only produces lithium battery casings with a flat surface, so new stamping equipment is needed to meet the production requirements of lithium battery casings. Summary of the Invention

[0005] In view of the above problems, the present invention provides an automatic stamping device for lithium battery casings.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: An automatic stamping equipment for lithium battery casing is provided, including a frame, a lower die base and an upper pressure base are provided on the inner side of the frame, a placement area for placing workpieces is formed between the lower die base and the upper pressure base, and a first drive component is provided on the frame for driving the upper pressure base to move vertically up and down. The lower die base is provided with a positioning component for positioning the metal plate. The upper pressure base and the lower die base are respectively provided with a stamping block and a first clearance block for cooperating to clamp the plate to form the bottom wall of the lithium battery casing. The lower die base is provided with a second drive component for driving the first clearance block to rise and fall. An upper forming block is provided on the outer side of the upper pressure block on the upper pressure seat. The upper forming block is vertically slidably disposed in the upper pressure seat. A third drive assembly is provided in the upper pressure seat to drive the upper forming block to move vertically up and down. A lower forming block is provided around the first clearance block on the lower die seat. The lower forming block and the upper forming block cooperate to form the reinforcing rib on the side wall of the lithium battery shell. The punch of the reinforcing rib is disposed on the bottom wall of the upper forming block. A fourth drive assembly is provided on the lower die seat to drive the lower forming block to keep it in contact with the workpiece during the stamping process.

[0007] Furthermore, the first drive assembly includes a first hydraulic cylinder, which is fixedly mounted on the frame. Several first guide columns are vertically mounted on the frame, and the upper pressure seat is slidably sleeved on the first guide columns. The second drive assembly includes a second hydraulic cylinder, and a stamping groove is provided on the lower die base. The second hydraulic cylinder is fixedly mounted on the lower die base. The third drive assembly includes a third hydraulic cylinder, which is fixedly mounted on the upper mold base.

[0008] Furthermore, the positioning component includes a positioning block protruding from the top wall of the lower mold base, which is used to engage with the angle formed by the upper flange of the plate and the adjacent side plate.

[0009] Furthermore, the fourth drive assembly includes a diagonal brace. The lower mold base has clearance openings around the first clearance block for the lower forming block to pass vertically. A rotating shaft is provided at one end of the lower forming block near the first clearance block. A strip groove is vertically provided on the inner wall of the clearance opening. The rotating shaft is slidably disposed in the strip groove. The diagonal brace is rotatably disposed in the lower mold base. The diagonal brace is in rolling contact with the bottom wall of the lower forming block. A first drive source is provided on the lower mold base for driving the diagonal brace to rotate.

[0010] Furthermore, the lower mold base is provided with a support groove for accommodating and supporting the molding block in a horizontal state. The support groove is provided with a first mounting groove for accommodating the inclined brace. The first mounting groove is provided with a slide rail. A slider is slidably arranged in the slide rail. The first driving source is a fourth hydraulic cylinder. The fourth hydraulic cylinder is used to drive the slider to move. A transmission rod is hinged on the slider. The end of the transmission rod away from the slider is hinged to the inclined brace.

[0011] Furthermore, a second mounting groove is provided on the side of the lower forming block used to fit the workpiece, a reset push block is slidably disposed in the second mounting groove, and a first elastic element is provided in the lower forming block to drive the reset push block out of the second mounting groove.

[0012] Furthermore, several rollers are rotatably mounted on the diagonal brace, and the rollers make rolling contact with the bottom wall of the lower forming block.

[0013] Furthermore, the lower mold base is provided with a side pressing assembly for pressing the upper flange of the side plate so that the flange overlaps the adjacent side plates. The lower forming block includes two mutually symmetrical first forming blocks and two mutually symmetrical second forming blocks. The side pressing assembly includes a side pressing push block. Each first forming block has a side pressing push block on both sides. The side pressing push block is axially slidably disposed in the lower mold base along the rotation axis of the second forming block. The lower mold base is provided with a fifth driving assembly for driving the side pressing push block to move.

[0014] Furthermore, the side-pressing pusher is provided with a guide slope near the end face of the second forming block and near the edge of the stamping groove.

[0015] Furthermore, a third mounting groove is provided on both sides of the corresponding clearance opening of the second forming block in the lower mold base. A shaping block is slidably arranged in the third mounting groove. The shaping block is provided with a number of shaping teeth for stamping the flange edge. A second elastic element is provided in the lower mold base for driving the shaping block and shaping teeth into the third mounting groove. A guide wheel is rotatably arranged on the shaping block. The shaping teeth are driven out of the third mounting groove by the guide wheel cooperating with the guide inclined surface.

[0016] The beneficial effects of this invention are as follows: When processing the lithium battery casing, the metal sheet obtained from blanking is positioned on the lower die base, and the upper pressure base presses down. First, the upper forming block and the lower forming block cooperate to stamp and form reinforcing ridges on the side plate of the sheet. Then, the upper forming block rises and the lower forming block flips up, turning the side plate up to form the approximate shape of the battery casing. The upper pressure base presses down further, causing the battery casing and the lower forming block to sink into the lower die base together for further shaping of the battery casing. The inner pressing and pushing block of the lower die base can be activated to fold and overlap the flange on the adjacent side plate. Finally, the battery casing is sent out of the stamping groove, realizing automatic stamping and forming of the lithium battery casing, reducing wrinkles caused by excessive metal flow during the stamping and forming of the lithium battery casing, and automatically processing the flange, thus improving the stamping efficiency of the lithium battery casing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the automatic stamping equipment for lithium battery casings according to an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the lower mold base according to an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the upper pressure seat in an embodiment of this application.

[0020] Figure 4 This is a structural schematic diagram of the initial mounting plate state of the mold base structure in an embodiment of this application.

[0021] Figure 5This is a structural schematic diagram of the lower molding block in the folded state of the side plate of the sheet metal according to an embodiment of this application.

[0022] Figure 6 This is a partial cross-sectional view of the lower molding block according to an embodiment of this application.

[0023] Figure 7 This is a structural schematic diagram of the side-pressure assembly in an embodiment of this application, showing the folded-over edge of the outer shell.

[0024] Figure 8 for Figure 7 A magnified view of part A in the diagram.

[0025] Figure 9 This is a schematic diagram of the positioning block and positioning teeth in an embodiment of this application.

[0026] The components include: 1. Frame; 11. Upper pressure seat; 12. Lower mold base; 121. Relief opening; 122. Strip groove; 123. Support groove; 13. Placement area; 14. First drive assembly; 15. First guide post; 2. Positioning block; 3. Stamping block; 4. First relief block; 41. Second drive assembly; 42. Support step; 5. Upper forming block; 51. Third drive assembly; 6. Lower forming block; 61. Fourth drive assembly; 611. Diagonal brace. 612, slider; 613, first drive source; 614, transmission rod; 615, second mounting groove; 616, reset push block; 617, first elastic element; 618, roller; 62, first forming block; 63, second forming block; 7, side pressure assembly; 71, side pressure push block; 711, guide slope; 72, fifth drive assembly; 81, third mounting groove; 82, shaping block; 83, shaping tooth; 84, second elastic element; 85, guide wheel. Detailed Implementation

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] This application discloses an automatic stamping device for lithium battery casings, referring to... Figure 1 , Figure 2 and Figure 3The system includes a frame 1, within which a lower mold base 12 and an upper pressure base 11 are arranged sequentially from bottom to top. The upper pressure base 11 is vertically and vertically mounted within the frame 1, forming a placement area 13 for placing workpieces between the upper pressure base 11 and the lower mold base 12. Specifically, first guide posts 15 are vertically fixedly mounted at the four corners of the frame 1, and guide sleeves are fixedly mounted at the four corners of the upper pressure base 11. Guide slides are slidably fitted onto the first guide posts 15. The frame 1 is provided with a first drive assembly 14 for driving the upper pressure base 11 to move vertically. The first drive assembly 14 can specifically be a first hydraulic cylinder. An upper mounting plate and a lower mounting plate are respectively provided at the top and bottom of the frame 1. The first hydraulic cylinder is fixed on the upper mounting plate, and the piston rod of the first hydraulic cylinder passes through the upper mounting plate and is fixedly connected to the upper pressure base 11.

[0029] The lower die base 12 is equipped with a positioning component for positioning the metal plate obtained from blanking, allowing workers to quickly position the metal plate on the lower die base 12 during the stamping process. In this embodiment, the metal plate obtained from blanking in the previous step is cross-shaped. By folding the four side plates upwards, a lithium battery casing with a top opening is formed. Flanges extend from the two parallel side plates on both sides of the side plates. By folding the folds, the folds can overlap the other two side plates. In subsequent production processes, the overlapping folds and side plates are welded to form a stable lithium battery casing. The positioning component is specifically a positioning block 2 protruding from the top wall of the lower die base 12. The positioning block 2 is used to abut against the angle formed between the fold on the metal plate and the adjacent side plate. The positioning block 2 includes at least two blocks, which diagonally abut against the two angles on the plate to achieve rapid positioning of the plate during installation onto the lower die base 12. The upper pressure base 11 and the upper forming block 5 leave space for the positioning block 2.

[0030] A stamping block 3 is fixedly installed at the bottom of the upper pressure seat 11. A stamping groove is opened on the lower die seat 12. A first clearance block 4 is vertically and vertically installed in the stamping groove. The lower die seat 12 is provided with a second drive assembly 41 for driving the first clearance block 4 to move vertically up and down in the stamping groove. When the upper pressure seat 11 moves downward to stamp the sheet metal, the stamping block 3 cooperates with the first clearance block 4 to clamp the sheet metal in the middle. Then, the first clearance block 4 and the stamping block 3 descend synchronously, so that the sheet metal is formed into a shell in the stamping groove. Specifically, the second drive assembly 41 can be a second hydraulic cylinder, which is fixedly installed on the lower die seat 12. The piston rod of the second hydraulic cylinder is fixedly connected to the first clearance block 4.

[0031] Reference Figure 4 and Figure 5In order to stamp reinforcing ridges on the side walls of the outer shell, in this embodiment, the bottom of the upper pressure seat 11 is provided with upper forming blocks 5 around the stamping block 3, and the top of the lower die seat 12 is provided with lower forming blocks 6 on the four axes of the stamping groove. The upper forming blocks 5 are punches, and the lower forming blocks 6 are dies. The upper forming blocks 5 are vertically lifted and lowered on the upper pressure seat 11. The upper pressure seat 11 is provided with a third driving component 51 for driving the upper forming blocks 5 to rise and fall vertically. Through the third driving component 51, the bottom wall of the upper forming blocks 5 can be lowered to be flush with the bottom wall of the stamping block 3. During the process of the upper pressure block descending to the point where the stamping block 3 and the first relief block 4 clamp the plate, the upper forming blocks 5 and the lower forming blocks 6 cooperate with each other to stamp reinforcing ridges on the side plates around the plate. After the reinforcing ridges are formed, the upper forming blocks 5 rise, and the upper pressure seat 11 continues to descend to stamp the outer shell. Specifically, the third drive component 51 can be a third hydraulic cylinder, which is fixed on the upper pressure seat 11, and the piston rod of the third hydraulic cylinder is fixedly connected to the upper forming block 5.

[0032] To reduce wrinkles or twists on the upper edge of the outer shell caused by metal flow deformation during the sheet metal stamping process, in this embodiment, the lower forming block 6 is movably mounted on the lower die base 12, and the lower die base 12 is provided with a fourth driving assembly 61 for driving the lower forming block 6 to remain in contact with the workpiece during the stamping process. Specifically, the fourth drive assembly 61 includes a diagonal brace 611. The lower mold base 12 has clearance openings 121 around the first clearance block 4 for the vertical passage of the lower forming block 6. A pivot is located at one end of the lower forming block 6 near the first clearance block 4. A strip-shaped groove is vertically formed on the inner wall of the clearance opening 121. The pivot is slidably installed within the strip-shaped groove. The pivot's movement within the groove allows the lower forming block 6 to rotate around the pivot and to be vertically inserted into the clearance opening 121. A support step 42 is integrally fixed around the first clearance block 4, filling the clearance opening 121 and located below the lower forming block 6. The diagonal brace 611 is rotatably installed within the lower mold base 12 and rolls against the bottom wall of the lower forming block 6. The lower mold base 12 has a first drive source 613 for driving the diagonal brace 611 to rotate. By driving the diagonal brace 611 to rotate, the diagonal brace 611 pushes the forming block 6 to flip, and the side plate of the plate is folded upward, so that the plate can be pre-folded while maintaining the reinforcing edge.

[0033] After folding, the end of the lower forming block 6 furthest from the pivot is located below the upper forming block 5. The upper forming block 5 is moved downwards by the forming control until the lower forming block 6 comes into contact with it. Specifically, a contact sensor and an infrared sensor can be installed at the end of the lower forming block 6 furthest from the pivot to detect the contact state between the upper and lower forming blocks 5 in real time. Once contact is confirmed, the upper pressure seat 11 and the first clearance block 4 can continue to descend synchronously. As the stamping block 3 continues to push the plate downwards for stamping, the lower forming block 6 maintains contact with the side plate and gradually sinks into the clearance opening 121, completely stamping the plate into a battery casing. Simultaneously, the reinforcing ridge shape on the side plate is maintained, reducing forced metal flow during stamping and improving the quality of the formed battery casing.

[0034] In this embodiment, the lower mold base 12 has a support groove 123 for accommodating and supporting the horizontally positioned forming block 6. The support groove 123 also has a first mounting groove for accommodating the inclined support portion 611. A slide rail is formed on the inner wall of the first mounting groove, and a slider 612 is slidably mounted within the slide rail. A transmission rod 614 is hinged to the slider 612, with one end of the transmission rod 614 away from the slider 612 hinged to the inclined support portion 611. The first driving source 613 can specifically be a fifth hydraulic cylinder, which is fixed to the side wall of the lower mold base 12. The piston rod of the fifth hydraulic cylinder extends into the lower mold base 12 and is fixedly connected to the slider 612. The sliding direction of the slider 612 is perpendicular to the rotation axis of the corresponding inclined support portion 611 in space. By driving the slider 612 to move, the inclined support portion 611 can be flipped, thereby causing the lower forming block 6 to flip and fold its side plate.

[0035] After the workpiece is pressed and molded, as the upper pressure seat 11 and the first relief block 4 rise, the upper support step 42 of the first relief block 4 supports the lower forming block 6 to exit the relief opening 121. Furthermore, when the first relief block 4 rises to be flush with the top wall of the lower mold seat 12, the upper forming block 5 is driven to gradually descend, so that the stamping block 3 gradually removes the molded battery casing from the stamping block 3 as the upper pressure seat 11 rises, thus avoiding the situation where the battery casing is stuck on the stamping block 3 and causes difficulty in demolding.

[0036] In this embodiment, the length of the diagonal brace 611 should be less than the length of the lower forming block 6. During the stamping process, the diagonal brace 611 first supports and flips the lower forming block 6 to a vertical position. When the lower forming block 6 is pushed into the relief opening 121, the diagonal brace 611 retracts and descends, and the upper pressure seat 11 descends. When the lower forming block 6 is pushed upward from the relief opening 121, the diagonal brace rises to support the lower forming block 6, preventing the lower forming block 6 from freely flipping outward and causing the lower forming block 6 to collide with the support groove 123.

[0037] Furthermore, several rollers 618 are rotatably mounted on the diagonal brace 611. The axes of the rollers 618 are parallel to the rotation axis of the diagonal brace 611, and the rollers 618 are evenly spaced along the length of the diagonal brace 611. When the lower forming block 6 is pushed downward by the pressure seat 11, the rollers 618 can reduce the friction between the lower forming block 6 and the inner wall of the stamping groove when it is fed into the relief opening 121, so that the lower forming block 6 can smoothly enter the relief opening 121 during the process of supporting the side plate of the plate.

[0038] Reference Figure 6 Furthermore, to ensure that the lower forming block 6 can naturally rotate outward after rising from the stamping groove along with the upper pressure seat 11 and the first relief block 4, thus preventing the lower forming block 6 from remaining attached to the battery casing and affecting demolding, in this embodiment, a second mounting groove 615 is provided on the side of the lower forming block 6 used to attach to the workpiece. A reset push block 616 is slidably disposed in the second mounting groove 615, and a first elastic member 617 is provided in the lower forming block 6 to drive the reset push block 616 out of the second mounting groove 615. After the lower forming block 6 rises from the relief opening 121, the first elastic member 617 pushes the reset push block 616 to contact the side plate of the top contact plate, so that the lower forming block 6 is no longer in a vertical state, making it easier for the lower forming block 6 to flip over and contact the inclined support 611, so that the battery casing can be demolded smoothly. The first elastic element 617 is a first spring. The first end of the first spring is fixedly connected to the bottom wall of the second mounting groove 615, and the other end is fixedly connected to the reset push block 616. An anti-detachment structure is designed between the reset push block 616 and the second mounting groove 615.

[0039] Reference Figure 7 , Figure 8 and Figure 9 Furthermore, to improve the processing efficiency of the lithium battery casing, a side-pressing assembly 7 is provided in the lower mold base 12 for pressing the flange on the side plate so that the flange overlaps with the adjacent side plate. Specifically, the side-pressing assembly 7 includes a side-pressing push block 71. In this embodiment, the lower forming block 6 includes two mutually symmetrical first forming blocks 62 and two mutually symmetrical second forming blocks 63. The flange on the plate is integrally connected to the edge of the side plate corresponding to the first forming block 62. A side-pressing push block 71 is provided on both sides of each of the two first forming blocks 62. The side-pressing push block 71 is slidably disposed in the lower mold base 12 along the rotation axis of the second forming block 63. A fifth driving assembly 72 for driving the side-pressing push block 71 is provided in the lower mold base 12. The fifth driving assembly 72 is specifically a sixth hydraulic cylinder, which is fixed on the outer wall of the lower mold base 12. The piston rod of the sixth hydraulic cylinder extends into the lower mold base 12 and is fixedly connected to the side-pressing push block 71.

[0040] Furthermore, the side pressure push block 71 is provided with a guide slope 711 near the end face of the second forming block 63 and near the edge of the stamping groove. The guide slope 711 can prevent the side pressure push block 71 from causing flanging shear during the stamping and flanging process, thereby improving the stamping effect of flanging.

[0041] Furthermore, a third mounting groove 81 is provided on both sides of the clearance opening 121 corresponding to the second forming block 63 within the lower mold base 12. The third mounting groove 81 connects to the stamping groove, and the opening of the third mounting groove 81 faces the flange of the folded and fitting side plate. A shaping block 82 is slidably installed within the third mounting groove 81 along the depth direction of the third mounting groove 81. A shaping tooth 83 is integrally fixed on the side of the shaping block 82 facing the stamping groove. The side pressure push block 71 has clearance grooves corresponding one-to-one with the positioning teeth. A second elastic element 84 is provided within the shaping block 82 to drive the shaping block 82 and the shaping tooth 83 into the third mounting groove 81. The second elastic element 84 is a second spring, one end of which is fixedly connected to the bottom wall of the third mounting groove 81, and the other end is fixedly connected to the shaping block 82. In this embodiment, a guide wheel 85 is rotatably mounted on the shaping block 82. After the side pressure push block 71 folds and stamps the flange, the guide inclined surface 711 on the side pressure push block 71 rolls into contact with the guide wheel 85. During the continuous feeding process, the shaping teeth 83 on the shaping block 82 extend out of the third mounting groove 81 and press the edge of the flange, so that the edge of the flange corresponding to the shaping teeth 83 tightly presses the overlapping side plate. The flange metal part is embedded in the side plate at the shaping teeth 83, and the two are simply fixed by simple forging. After the side pressure push block 71 retracts, the shaping teeth 83 retract into the third mounting groove 81 under the action of the second elastic member 84. After the workpiece is lifted from the stamping groove, the flange and the side plate still maintain a connection relationship, which facilitates the maintenance of the shell shape during the subsequent transfer of the battery shell and facilitates the subsequent welding operation of the flange and the side plate. In other embodiments, a recess that mates with the shaping teeth 83 can also be designed on the stamping block 3. This method improves the connection between the flange and the side plate, but it brings problems such as unevenness inside the battery casing and difficulty in demolding the casing from the stamping block 3. It is necessary to control the shape and depth of the recess to avoid the above problems to a certain extent.

[0042] The implementation process of an automatic stamping device for lithium battery casing according to an embodiment of this application is as follows: First, the blanked sheet is placed on the lower die base 12 and positioned by a positioning component. Next, the upper forming block 5 descends to be flush with the lower end face of the stamping block 3, and the upper pressure seat 11 descends. With the cooperation of the upper forming block 5 and the lower forming block 6, reinforcing ridges are pressed out on each side plate of the sheet. Subsequently, the upper forming block 5 rises, and during the rotation of the inclined support 611, each lower forming block 6 flips upward around the pivot, folding the sheet into a box shape. Then, after the upper forming block 5 descends to contact the top of the lower forming block 6, the upper pressure seat 11 and the first clearance block 4 descend synchronously, completely sinking the lower forming block 6 and the battery casing into the stamping groove for further shaping of the battery casing. During the descent of the upper pressure seat 11, the inclined support 611 rotates and retracts into the lower die base 12.

[0043] Next, each side-pressing pusher 71 operates synchronously, folding the flange of the battery casing over the adjacent side plate. The side-pressing pusher 71 continues to operate, pushing the shaping teeth 83 on the side of the lower forming block 6 out of the lower forming block 6, so that the flange engages and is fixed with the side plate. Finally, after the side-pressing pusher 71 resets, the shaping teeth 83 automatically return to their position, the upper pressing seat 11 and the first relief block 4 rise synchronously, and the inclined support 611 also rotates and rises. After the lower forming block 6 is completely raised and disengaged from the relief opening 121, under the pushing action of the reset pusher 616, the lower forming block 6 detaches from the surface of the battery casing and is supported on the inclined support 611. Subsequently, it descends with the rotation of the inclined support 611, and the lower forming block 6 is placed back into the support groove 123. After the battery casing rises from the stamping groove, the upper forming block 5 descends relative to the upper pressing seat 11, and the upper pressing seat 11 rises at the same speed, thus pushing the battery casing off the stamping block 3, completing the overall stamping process of the lithium battery casing.

[0044] Those skilled in the art will understand that although preferred embodiments of the invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims of the invention and their equivalents, the invention also intends to include these modifications and modifications.

Claims

1. An automatic stamping equipment for lithium battery casings, characterized in that: Includes a frame (1), on which a lower mold base (12) and an upper pressure base (11) are provided on the inner side, and a placement area (13) for placing workpieces is formed between the lower mold base (12) and the upper pressure base (11), and a first drive assembly (14) for driving the upper pressure base (11) to rise and fall vertically is provided on the frame (1); The lower die base (12) is provided with a positioning component for positioning the metal plate. The upper pressure base (11) and the lower die base (12) are respectively provided with a stamping block (3) and a first clearance block (4) for cooperating to clamp the plate to form the bottom wall of the lithium battery shell. The lower die base (12) is provided with a second driving component (41) for driving the first clearance block (4) to rise and fall. An upper forming block (5) is provided on the upper pressure seat (11) on the outside of the stamping block (3). The upper forming block (5) is vertically slidably disposed in the upper pressure seat (11). A third drive assembly (51) for driving the upper forming block (5) to rise and fall vertically is provided in the upper pressure seat (11). A lower forming block (6) is provided on the lower die seat (12) around the first clearance block (4). The lower forming block (6) cooperates with the upper forming block (5) to form the reinforcing rib on the side wall of the lithium battery shell. The punch of the reinforcing rib is disposed on the bottom wall of the upper forming block (5). A fourth drive assembly (61) for driving the lower forming block (6) to keep it in contact with the workpiece during the stamping process is provided on the lower die seat (12).

2. The automatic stamping equipment for lithium battery casings according to claim 1, characterized in that, The first drive assembly (14) includes a first hydraulic cylinder, which is fixedly mounted on the frame (1). Several first guide columns (15) are vertically mounted on the frame (1), and the upper pressure seat (11) is slidably sleeved on the first guide columns (15). The second drive assembly (41) includes a second hydraulic cylinder, and the lower die base (12) is provided with a stamping groove. The second hydraulic cylinder is fixedly mounted on the lower die base (12). The third drive assembly (51) includes a third hydraulic cylinder, which is fixedly mounted on the upper mold base.

3. The automatic stamping equipment for lithium battery casings according to claim 1, characterized in that, The positioning component includes a positioning block (2) protruding from the top wall of the lower mold base (12), the positioning block (2) being used to match the angle formed by the upper flange of the plate and the adjacent side plate.

4. The automatic stamping equipment for lithium battery casings according to claim 1, characterized in that, The fourth drive assembly (61) includes a bracing part (611). The lower mold base (12) has a clearance opening (121) around the first clearance block (4) for the lower forming block (6) to pass vertically. The lower forming block (6) has a rotating shaft at one end near the first clearance block (4). A strip groove (122) is vertically opened on the inner wall of the clearance opening (121). The rotating shaft is slidably disposed in the strip groove (122). The bracing part (611) is rotatably disposed in the lower mold base (12). The bracing part (611) is in rolling contact with the bottom wall of the lower forming block (6). The lower mold base (12) is provided with a first drive source (613) for driving the bracing part (611) to rotate.

5. The automatic stamping equipment for lithium battery casings according to claim 4, characterized in that, The lower mold base (12) is provided with a support groove (123) for accommodating and supporting the forming block (6) in a horizontal state. The support groove (123) is provided with a first mounting groove for accommodating the inclined support (611). The first mounting groove is provided with a slide rail. A slider (612) is slidably arranged in the slide rail. The first driving source (613) is a fourth hydraulic cylinder. The fourth hydraulic cylinder is used to drive the slider (612) to move. A transmission rod (614) is hinged on the slider (612). The end of the transmission rod (614) away from the slider (612) is hinged to the inclined support (611).

6. The automatic stamping equipment for lithium battery casings according to claim 5, characterized in that, The lower forming block (6) has a second mounting groove (615) on one side for fitting the workpiece. A reset push block (616) is slidably disposed in the second mounting groove (615). The lower forming block (6) has a first elastic element (617) for driving the reset push block (616) to extend out of the second mounting groove (615).

7. The automatic stamping equipment for lithium battery casings according to claim 5, characterized in that, A plurality of rollers (618) are rotatably mounted on the inclined support (611), and the rollers (618) make rolling contact with the bottom wall of the lower forming block (6).

8. The automatic stamping equipment for lithium battery casings according to claim 5, characterized in that, The lower mold base (12) is provided with a side pressing assembly (7) for pressing the upper flange of the side plate so that the flange overlaps the adjacent side plates. The lower forming block (6) includes two mutually symmetrical first forming blocks (62) and two mutually symmetrical second forming blocks (63). The side pressing assembly (7) includes a side pressing push block (71). Each first forming block (62) is provided with a side pressing push block (71) on both sides. The side pressing push block (71) is slidably disposed in the lower mold base (12) along the rotation axis of the second forming block (63). The lower mold base (12) is provided with a fifth driving assembly (72) for driving the side pressing push block (71) to move.

9. An automatic stamping device for lithium battery casings according to claim 8, characterized in that, The side pressure pusher (71) is provided with a guide slope (711) near the end face of the second forming block (63) and near the edge of the stamping groove.

10. An automatic stamping equipment for lithium battery casings according to claim 9, characterized in that, The lower die base (12) has a third mounting groove (81) on both sides of the corresponding clearance opening (121) of the second forming block (63). A shaping block (82) is slidably arranged in the third mounting groove (81). The shaping block (82) is provided with a plurality of shaping teeth (83) for stamping the flange edge. The lower die base (12) is provided with a second elastic element (84) for driving the shaping block (82) and the shaping teeth (83) into the third mounting groove (81). A guide wheel (85) is rotatably arranged on the shaping block (82). The guide wheel (85) cooperates with the guide inclined surface (711) to drive the shaping teeth (83) out of the third mounting groove (81).

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