Lithium ribbon extrusion device capable of reducing residual lithium accumulation

Abstract

The utility model relates to extrusion device technical field, concretely relates to a lithium ribbon extrusion device that can reduce residual lithium material accumulation, including support, the upside of support is sequentially provided with extrusion cylinder, and the working end of extrusion cylinder is connected with the input end of extrusion box, and the side away from extrusion cylinder of extrusion box is provided with the discharge gate, and the downside of discharge gate is provided with the support plate. Through the thickness of lithium ribbon product of direct adjustment lithium ribbon mould mechanism, the surface contact force distribution of lithium metal is even, can avoid local pressure too big or too small, reduce the uneven deformation of lithium metal surface, avoid the thickness difference caused by uneven flow, ensure the final shape and size accuracy of lithium metal ribbon, prevent lithium metal from accumulating or flowing in the discharge gate, solve the deformation of rubber pad and easily affect the surface contact force of lithium metal, make the flow path of lithium metal not be straight line, easily cause lithium metal to accumulate or flow in the discharge gate of metal lithium ribbon extrusion device.

Description

Technical Field

[0001] This utility model relates to the field of extrusion device technology, specifically to a lithium strip extrusion device that can reduce the accumulation of residual lithium material. Background Technology

[0002] Lithium strip is a thin sheet of lithium metal and is one of the core raw materials in lithium battery production. Lithium metal strip can be used as a negative electrode material to provide energy storage in lithium batteries. It is also widely used in the manufacture of electronic components such as capacitors and sensors. The most direct function of a lithium strip extrusion device is to process lithium metal into thin strips for further use in battery manufacturing or the production of other electronic products.

[0003] Chinese Patent Publication No. CN214639189U discloses a lithium metal strip extrusion device, belonging to the technical field of extrusion devices. It includes an extrusion sleeve, the inner wall of which is slidably connected to a piston. The piston includes a metal block and a sealing ring. A sealing ring is installed on the outer wall of the metal block. There are three sealing rings, each comprising a rubber ring and a metal skeleton. The metal skeleton is fixedly installed inside the rubber ring. The metal skeleton includes a metal ring and protrusions. Protrusions are welded to the outer wall of the metal ring. A fixing plate is detachably installed on one end of the outer wall of the extrusion sleeve. The other end of the outer wall of the extrusion sleeve is rotatably connected to a movable plate via a hinge. The width of the extrusion nozzle of this lithium metal strip extrusion device is adjustable, allowing for the extrusion of lithium metal strips of different thicknesses as needed. The piston of this lithium metal strip extrusion device adopts a three-layer sealing ring design, providing a strong sealing effect and preventing leakage.

[0004] The aforementioned patent mentions that a rubber sheet is installed at the discharge port of the extrusion sleeve. When the screw rotates, the movable plate rotates with the screw, and the rubber sheet deforms along with the rotation of the movable plate. Because the rubber pad itself has strong elasticity and compressibility, when pressure is applied to the lithium strip, the rubber pad can be compressed, causing uneven deformation of its surface. This deformation of the rubber pad easily affects the surface contact force of the lithium metal, causing the flow path of the lithium metal to no longer be straight. This can easily lead to the accumulation of lithium metal at the discharge port of the lithium strip extrusion device or obstruction of flow. Therefore, we propose a lithium strip extrusion device that can reduce the accumulation of residual lithium material. Utility Model Content

[0005] To address the aforementioned issues, a lithium strip extrusion device is provided that can reduce the accumulation of residual lithium material. The thickness of the finished lithium strip is directly adjusted through the forming mold mechanism, ensuring a uniform distribution of the surface contact force of the lithium metal. This avoids excessive or insufficient local pressure, improves overall stability, and prevents lithium metal from accumulating at the outlet or causing flow obstruction. It also solves the technical problem that the deformation of the rubber pad can easily affect the surface contact force of the lithium metal, causing the flow path of the lithium metal to deviate from a straight line, which can easily lead to the accumulation or flow obstruction of lithium metal at the outlet of the lithium strip extrusion device.

[0006] To address the existing technical problems, this utility model provides a lithium strip extrusion device that can reduce the accumulation of residual lithium material. The device includes a support frame, with extrusion cylinders sequentially arranged on the upper side of the support frame. The working end of the extrusion cylinder is connected to the input end of the extrusion box. An outlet is located on the side of the extrusion box away from the extrusion cylinder. A support plate is located below the outlet. A forming mold mechanism for adjusting the lithium strip thickness and preventing lithium material accumulation is located outside the outlet. A displacement mechanism is provided on the forming mold mechanism for providing power for changing the mold.

[0007] Preferably, the forming die mechanism includes a die assembly for providing dies of different thicknesses for the lithium strip extrusion device. The die assembly includes a first forming part, a second forming part, and a third forming part. The first forming part is disposed on the outside of the discharge port. The second forming part is disposed on the side of the first forming part away from the discharge port. The third forming part is disposed on the side of the second forming part away from the first die.

[0008] Preferably, the molding die mechanism further includes a positioning mechanism and a guiding mechanism; the positioning mechanism is disposed on the die assembly and is used to assist the first molded part, the second molded part and the third molded part in neatly aligning with each other; the guiding mechanism is disposed on the die assembly and the discharge port and is used to assist the first molded part, the second molded part and the third molded part in linear movement.

[0009] Preferably, the positioning mechanism includes a docking frame and a docking groove; the docking frame is connected to the first molded part, the second molded part and the third molded part respectively; the docking groove is opened on the side of the discharge port near the docking frame, the side of the first molded part near the second molded part and the side of the second molded part near the third molded part, and the docking groove is used to cooperate with the docking frame for locking and docking.

[0010] Preferably, the guiding mechanism includes a connecting plate and a guide rod; the connecting plate is connected to the lower side of the first molded part, the lower side of the second molded part, and the lower side of the third molded part, respectively; one end of the guide rod slides through both sides of the connecting plate, and the other end of the guide rod is connected to the support plate.

[0011] Preferably, the displacement mechanism includes a limiting mechanism and a lifting mechanism; the limiting mechanism is disposed on the guide mechanism and is used to prevent the first molded part, the second molded part and the third molded part from shifting after being combined; the lifting mechanism is disposed on the support plate and the limiting mechanism and is used to drive the displacement mechanism to move vertically in a straight line.

[0012] Preferably, the limiting mechanism includes a power component, a connecting frame, a docking cover, a docking block, and a telescopic component; the power component is located on one side of the support plate; the connecting frame is connected to the working end of the power component; the docking cover is connected to the connecting frame; the docking block is connected to the lower side of the connecting plate, and the docking block is used to engage with the docking cover; the movable end of the telescopic component is connected to the connecting frame, and the fixed end of the telescopic component is connected to the power component.

[0013] Preferably, the lifting mechanism includes a sliding plate, a sliding groove, and a screw; the sliding plate is connected to the power component; the sliding groove is opened on the side of the support plate near the sliding plate, and the sliding groove is used to cooperate with the slider for linear movement; the screw is rotatably disposed in the sliding groove, and the screw is threadedly connected to the sliding plate.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. By directly adjusting the thickness of the finished lithium strip through the forming mold mechanism, the surface contact force of the lithium metal is evenly distributed, which can avoid excessive or insufficient local pressure, reduce uneven deformation of the lithium metal surface, avoid thickness differences caused by uneven flow, ensure the final shape and dimensional accuracy of the lithium metal strip, and prevent lithium metal from accumulating at the outlet or obstructing flow. This solves the technical problem that the deformation of the rubber pad can easily affect the surface contact force of the lithium metal, making the flow path of the lithium metal no longer straight, which can easily cause lithium metal to accumulate at the outlet of the lithium metal strip extrusion device or obstruct flow.

[0016] 2. By using a displacement mechanism to limit the positions of the first, second, and third forming parts, it is ensured that each forming part operates in the correct position, preventing gaps between the discharge port and the mold assembly, and avoiding lithium material leakage due to misalignment or gaps. This ensures a more precise lithium metal forming process, improves the dimensional and shape accuracy of the product, and solves the technical problem of lithium material leakage from the mold during lithium strip extrusion operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a support, extrusion box, and connection structure of a lithium strip extrusion device that can reduce the accumulation of residual lithium material.

[0018] Figure 2 This is a three-dimensional schematic diagram of the extrusion cylinder and extrusion box and their connection structure of a lithium strip extrusion device that can reduce the accumulation of residual lithium material.

[0019] Figure 3This is a three-dimensional schematic diagram of the first and second forming parts and their connection structure of a lithium strip extrusion device that can reduce the accumulation of residual lithium material.

[0020] Figure 4 This is a three-dimensional schematic diagram of the third forming part and docking frame and their connection structure of a lithium strip extrusion device that can reduce the accumulation of residual lithium material.

[0021] Figure 5 It is a lithium strip extrusion device that can reduce the accumulation of residual lithium material. Figure 2 Enlarged diagram of point A in the middle.

[0022] Figure 6 It is a lithium strip extrusion device that can reduce the accumulation of residual lithium material. Figure 3 Enlarged diagram of point B in the middle.

[0023] Figure 7 It is a lithium strip extrusion device that can reduce the accumulation of residual lithium material. Figure 3 Enlarged diagram of point B in the middle.

[0024] The following are the labels in the diagram: 1. Support; 11. Extrusion cylinder; 12. Extrusion box; 13. Discharge port; 131. Support plate; 2. First forming part; 21. Second forming part; 22. Third forming part; 23. Docking frame; 24. Docking groove; 25. Connecting plate; 26. Guide rod; 27. Power component; 28. Connecting frame; 29. ​​Docking cover; 210. Docking block; 211. Telescopic component; 212. Slide plate; 213. Slide groove; 214. Screw. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] See Figures 1-2 As shown, a lithium strip extrusion device that can reduce the accumulation of residual lithium material includes a support 1. An extrusion cylinder 11 is sequentially arranged on the upper side of the support 1. The working end of the extrusion cylinder 11 is connected to the input end of the extrusion box 12. An outlet 13 is arranged on the side of the extrusion box 12 away from the extrusion cylinder 11. A support plate 131 is arranged on the lower side of the outlet 13. A forming mold mechanism for adjusting the thickness of the lithium strip to prevent lithium material accumulation is arranged on the outer side of the outlet 13. A displacement mechanism for providing power for changing the mold of the forming mold mechanism is arranged on the forming mold mechanism. The forming mold mechanism includes a mold assembly for providing molds of different thicknesses for the lithium strip extrusion device. The mold assembly includes a first forming part 2, a second forming part 21, and a third forming part 22. The first forming part 2 is arranged on the outer side of the outlet 13. The second forming part 21 is arranged on the side of the first forming part 2 away from the outlet 13. The third forming part 22 is arranged on the side of the second forming part 21 away from the first mold.

[0027] Specifically, a vacuum heating chamber is installed on the upper surface of the extrusion box 12, and an openable and closable communication port is provided between the two. The heating part inside the vacuum heating chamber can heat the lithium ingot to soften or melt it. The thickness of the lithium strip forming cavity inside the first forming part 2 is greater than the thickness of the lithium strip forming cavity inside the second forming part 21, and the thickness of the lithium strip forming cavity inside the second forming part 21 is greater than the thickness of the lithium strip forming cavity inside the third forming part 22.

[0028] When the lithium strip extrusion device is running, the extrusion cylinder 11 pushes the softened lithium ingot in the extrusion box 12 toward the discharge port 13. At this time, the mold assembly installed at the discharge port 13 extrudes and shapes the lithium ingot to form a lithium strip. When it is necessary to adjust the thickness of the lithium strip, the limiting mechanism of the first forming part 2, the second forming part 21, and the third forming part 22 is released through the displacement mechanism, and the third forming part 22 is pulled outward to move outward along the guide mechanism, making the second forming part 21 the new outlet of the lithium strip. At this time, the thickness of the lithium strip increases; if the third forming part 22 is fixed to the second forming part 21 again, the thickness of the lithium strip decreases. The first forming part 2, the second forming part 21, and the third forming part 22 directly extrude and shape the lithium ingot. Since the rigid forming part has high rigidity and strength, it can better withstand and transmit high pressure than the rubber pad, achieve more uniform lithium metal shaping, provide higher shaping accuracy and consistency, and ensure long-term, efficient, and stable molding results.

[0029] See Figures 1-4 As shown, the molding die mechanism also includes a positioning mechanism and a guiding mechanism; the positioning mechanism is disposed on the die assembly and is used to assist the first molding part 2, the second molding part 21, and the third molding part 22 in neatly aligning with each other; the guiding mechanism is disposed on the die assembly and the discharge port 13 and is used to assist the first molding part 2, the second molding part 21, and the third molding part 22 in linear movement; the positioning mechanism includes a docking frame 23 and a docking groove 24; the docking frame 23 is connected to the first molding part 2, the second molding part 21, and the third molding part 22 respectively; The docking groove 24 is opened on the side of the discharge port 13 near the docking frame 23, the side of the first molding part 2 near the second molding part 21, and the side of the second molding part 21 near the third molding part 22. The docking groove 24 is used to engage with the docking frame 23. The guiding mechanism includes a connecting plate 25 and a guide rod 26. The connecting plate 25 is connected to the lower side of the first molding part 2, the lower side of the second molding part 21, and the lower side of the third molding part 22, respectively. One end of the guide rod 26 slides through both sides of the connecting plate 25, and one end of the guide rod 26 is connected to the support plate 131.

[0030] Specifically, the mating frame 23 and the mating groove 24 are matched. The inner side of the connecting plate 25 is compatible with the diameter of the guide rod 26.

[0031] When assembling the first molded part 2, the second molded part 21, and the third molded part 22, the first molded part 2 firstly drives the connecting plate 25 to slide along the guide rod, driving the docking frame 23 of the first molded part 2 to dock with the docking groove 24 of the discharge port 13. Since the docking frame 23 and the docking groove 24 match each other, and the inner side of the connecting plate 25 is compatible with the diameter of the guide rod 26, the first molded part 2 and the discharge port 13 achieve a complete fit. Subsequently, the second molded part 21 drives the connecting plate 25 to slide along the guide rod, driving the docking frame 23 of the second molded part 21 to dock with the docking groove 24 of the first molded part 2. Finally, the third molded part 22 drives the connecting plate 25 to slide along the guide rod, driving the docking frame 23 of the third molded part 22 to dock with the docking groove 24 of the second molded part 21.

[0032] Through the above assembly process, the discharge port 13 and the first molding part 2, the first molding part 2 and the second molding part 21, and the second molding part 21 and the third molding part 22 are all tightly fitted, ensuring that lithium material leakage does not easily occur between the mold components when the lithium strip extrusion device produces lithium strip.

[0033] See Figures 2-7 As shown, the displacement mechanism includes a limiting mechanism and a lifting mechanism. The limiting mechanism is mounted on the guide mechanism and is used to prevent displacement after the first forming part 2, the second forming part 21, and the third forming part 22 are combined. The lifting mechanism is mounted on the support plate 131 and the limiting mechanism and is used to drive the displacement mechanism to move vertically. The limiting mechanism includes a power component 27, a connecting frame 28, a docking cover 29, a docking block 210, and a telescopic component 211. The power component 27 is mounted on one side of the support plate 131. The connecting frame 28 is connected to the working end of the power component 27. The docking cover 29 is connected to the connecting frame 28. The connecting block 210 is connected to the lower side of the connecting plate 25, and the connecting block 210 is used to engage with the connecting cover 29; the movable end of the telescopic member 211 is connected to the connecting frame 28, and the fixed end of the telescopic member 211 is connected to the power member 27; the lifting mechanism includes a sliding plate 212, a sliding groove 213 and a screw 214; the sliding plate 212 is connected to the power member 27; the sliding groove 213 is opened on the side of the support plate 131 near the sliding plate 212, and the sliding groove 213 is used to cooperate with the slider for linear movement; the screw 214 is rotatably set in the sliding groove 213, and the screw 214 is threadedly connected to the sliding plate 212.

[0034] Specifically, the power component 27 uses a cylinder as the implementing element. The docking cover 29 is matched with the docking block 210. The telescopic component 211 is composed of a matching connecting pipe and a connecting rod that slide together. The sliding plate 212 is matched with the sliding groove 213.

[0035] After the discharge port 13, the first molding part 2, the second molding part 21, and the third molding part 22 are assembled, the screw 214 is rotated. Because the slide plate 212 and the slide groove 213 are matched, the slide plate 212 will not rotate with the screw 214. Furthermore, because the slide plate 212 is threadedly connected to the screw 214, the slide plate 212 can move upward stably, thereby driving the power component 27 to move upward stably. At this time, the power component 27 drives the docking cover 29 to dock with the docking block 210 through the connecting frame 28. Based on the matching between the docking cover 29 and the docking block 210, the docking block 210 will not wobble or shift inside the docking cover 29. When the power component 27 is activated, its working end retracts, which in turn drives the telescopic component 211 to retract. This causes the working end of the cylinder to stably drive the docking cover 29 to move through the connecting frame 28. In turn, the docking block 210 tightly fixes the first forming component 2, the second forming component 21, and the third forming component 22 to the discharge port 13, ensuring that the three components remain in a stable docking state and preventing loosening during lithium strip production by the lithium strip extrusion device.

[0036] When the lithium strip thickness needs to be adjusted, the power unit 27 is activated. Its working end, through the connecting frame 28, moves the docking cover 29 away from the discharge port 13. The screw 214 is rotated to move the cylinder downward, disengaging the docking cover 29 from the docking block 210. Based on the required lithium strip thickness, the first forming component 2, the second forming component 21, and the third forming component 22 are moved, causing the connecting plate 25 to move to the top of the slide rod and rotate downward. If the third forming component 22 or the second forming component 21 and the third forming component 22 need to be removed, they are rotated downward, and then the screw 214 is rotated again to move the power unit 27 upward, causing the docking block 210 of the first forming component 2 and the second forming component 21, or the docking block 210 of the first forming component 2, to re-dock with the docking cover 29, ensuring a stable docking state between the discharge port 13 and the first forming component 2, or between the discharge port 13, the first forming component 2, and the second forming component 2.

[0037] Working principle: When the lithium strip extrusion device is in operation, the extrusion cylinder 11 is started to push the softened lithium ingot in the extrusion box 12 toward the discharge port 13. At this time, the mold assembly installed at the discharge port 13 extrudes and shapes the lithium ingot to form a lithium strip. Since the rigid forming part has high rigidity and strength, it can better withstand and transmit high pressure than the rubber pad, achieve more uniform lithium metal shaping, provide higher shaping accuracy and consistency, and ensure long-term efficient and stable forming effect. When adjusting the thickness of the lithium strip, the rotating screw 214 moves down, causing the power component 27 to drive the docking cover 29 to disengage from the docking block 210. At this time, the operator can rotate the first forming part 2, the second forming part 21, and the third forming part 22 downward along the guide rod 26 as needed, so that the lithium strip extrusion device can easily adjust the thickness of the lithium strip.

[0038] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A lithium strip extrusion device for reducing residual lithium accumulation, comprising a support (1), an extrusion cylinder (11) sequentially arranged on the upper side of the support (1), the working end of the extrusion cylinder (11) being connected to the input end of an extrusion box (12), an outlet (13) being arranged on the side of the extrusion box (12) away from the extrusion cylinder (11), and a support plate (131) being arranged on the lower side of the outlet (13), characterized in that, A forming mold mechanism for adjusting the thickness of the lithium strip and preventing lithium accumulation is provided on the outside of the discharge port (13); The forming mold mechanism is equipped with a displacement mechanism for providing power for changing molds.

2. The lithium strip extrusion device according to claim 1, which can reduce the accumulation of residual lithium material, is characterized in that, The forming die mechanism includes a die assembly for providing dies of different thicknesses for the lithium strip extrusion device. The die assembly includes a first forming part (2), a second forming part (21), and a third forming part (22). The first molded part (2) is located on the outside of the discharge port (13); The second molding part (21) is disposed on the side of the first molding part (2) away from the outlet (13); The third molding part (22) is located on the side of the second molding part (21) away from the first mold.

3. A lithium strip extrusion device for reducing residual lithium accumulation according to claim 2, characterized in that, The molding die mechanism also includes a positioning mechanism and a guiding mechanism; The positioning mechanism is set on the mold assembly. The positioning mechanism is used to assist the first molded part (2), the second molded part (21) and the third molded part (22) to be neatly aligned with each other; The guiding mechanism is set on the mold assembly and the discharge port (13). The guiding mechanism is used to assist the first molded part (2), the second molded part (21) and the third molded part (22) in linear movement.

4. A lithium strip extrusion device for reducing residual lithium accumulation according to claim 3, characterized in that, The positioning mechanism includes a docking frame (23) and a docking groove (24); The docking frame (23) is connected to the first molding part (2), the second molding part (21) and the third molding part (22) respectively; The docking groove (24) is opened on the side of the discharge port (13) near the docking frame (23), the side of the first molding part (2) near the second molding part (21), and the side of the second molding part (21) near the third molding part (22). The docking groove (24) is used to engage with the docking frame (23).

5. A lithium strip extrusion device according to claim 3 that can reduce the accumulation of residual lithium material, characterized in that, The guiding mechanism includes a connecting plate (25) and a guide rod (26); The connecting plate (25) is connected to the lower side of the first molding part (2), the lower side of the second molding part (21) and the lower side of the third molding part (22) respectively; One end of the guide rod (26) slides through both sides of the connecting plate (25), and the other end of the guide rod (26) is connected to the support plate (131).

6. A lithium strip extrusion device for reducing residual lithium accumulation according to claim 1, characterized in that, The displacement mechanism includes a limiting mechanism and a lifting mechanism; The limiting mechanism is set on the guiding mechanism. The limiting mechanism is used to prevent the first molding part (2), the second molding part (21) and the third molding part (22) from shifting after they are combined. The lifting mechanism is mounted on the support plate (131) and the limiting mechanism. The lifting mechanism is used to drive the displacement mechanism to make vertical linear movements.

7. A lithium strip extrusion device for reducing residual lithium accumulation according to claim 6, characterized in that, The limiting mechanism includes a power component (27), a connecting frame (28), a docking cover (29), a docking block (210), and a telescopic component (211); The power component (27) is located on one side of the support plate (131); The connecting frame (28) is connected to the working end of the power component (27); The docking cover (29) is connected to the connecting frame (28); The docking block (210) is connected to the lower side of the connecting plate (25), and the docking block (210) is used to engage with the docking cover (29); The movable end of the telescopic component (211) is connected to the connecting frame (28), and the fixed end of the telescopic component (211) is connected to the power component (27).

8. A lithium strip extrusion device according to claim 5 that can reduce the accumulation of residual lithium material, characterized in that, The lifting mechanism includes a sliding plate (212), a chute (213), and a screw (214); The skateboard (212) is connected to the power unit (27); The slide (213) is provided on the side of the support plate (131) near the slide plate (212), and the slide (213) is used to cooperate with the slider to move linearly; The screw (214) is rotatably mounted in the slide groove (213), and the screw (214) is threadedly connected to the slide plate (212).

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