Electrode plate imprinting device for new energy automobile lithium battery

Abstract

The invention belongs to the technical field of lithium battery element preparation, and discloses an electrode plate coining device for a new energy automobile lithium battery, the electrode plate coining device comprises a rack, two rolling assemblies are mounted in the rack, each rolling assembly comprises a roller shaft, a roller sleeve and a plurality of mounting keys, one end of each roller shaft is rotatably connected with the rack through a bearing, the roller shafts are cylindrical, and the roller sleeves are connected with the mounting keys through bearings. An annular deformation cavity is formed in the peripheral wall of the roller shaft, the depth of the deformation cavity is gradually decreased from the middle to the two ends, a plurality of first key grooves are formed in the peripheral walls of the two ends of the roller shaft, the first key groove in one end extends to the end face of the roller shaft, and a plurality of second key grooves corresponding to the first key grooves are formed in the inner wall of the roller sleeve. By arranging the deformation cavity, the problem that the thickness of the roller is not uniform due to the fact that the middle of the roller is thick and the two sides of the roller are thin can be solved, through the split type roller shaft and roller sleeve design, the detachability of the roller sleeve is achieved, the roller sleeve can be conveniently and rapidly replaced and maintained, the problem that an integral roller is difficult to maintain is solved, and meanwhile the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium battery element manufacturing, and more specifically, to an electrode sheet imprinting device for lithium batteries used in new energy vehicles. Background Technology

[0002] In the production process of lithium-ion batteries for new energy vehicles, electrode rolling involves applying pressure to a current collector coated with active material using rollers to improve the density and surface flatness of the electrode sheets, thereby enhancing the energy density and consistency of the battery.

[0003] Currently, the electrode rolling devices widely used in the industry typically consist of a frame and two parallel rolls. During operation, the electrode sheet passes through the gap between the two rolls and undergoes plastic deformation under the pressure applied by the rolls. However, because the rigidity of the rolls in the length direction is not infinite, and the material distribution of the electrode sheet in the width direction is slightly uneven, the roll body will undergo slight bending deformation under the rolling force, resulting in a convexity on the contact surface of the electrode sheet. This deformation directly causes the gap width to gradually increase from the middle to both ends, ultimately leading to an uneven thickness problem in the rolled electrode sheet, with a thicker middle and thinner edges. This seriously affects the uniformity of the electrode sheet quality, and consequently, adversely affects the overall performance and safety of the battery.

[0004] To compensate for this deformation, the common method in existing technologies is to use rolls with a slight convexity. That is, during roll processing, the working surface is pre-ground into a micro-arch with a middle diameter slightly larger than the diameters at both ends. This method can, to some extent, offset the deformation under stress, making the roll tend to be straight under pressure. However, this method still has limitations. First, the pre-arch of the roll is designed for specific rolling forces, electrode materials, and widths. Once these process parameters change, the pre-set arch cannot effectively compensate. Second, during long-term use, the roll's contour will change due to wear, and the original convexity will become ineffective. In this case, the entire roll needs to be removed from the stand for rework and grinding, resulting in high maintenance costs and difficulties. Therefore, we propose an electrode imprinting device for lithium batteries in new energy vehicles. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes an electrode sheet imprinting device for lithium batteries of new energy vehicles. By setting a deformation cavity, it can solve the problem of uneven thickness of the roll, which is thicker in the middle and thinner at both sides. Through the split roller shaft and roller sleeve design, the roller sleeve is detachable, which facilitates quick replacement and maintenance of the roller sleeve, solves the problem of difficult maintenance of integral rolls, and reduces maintenance costs.

[0006] An electrode sheet imprinting device for lithium batteries in new energy vehicles includes a frame. Two roller pressing assemblies are installed inside the frame. Each roller pressing assembly includes a roller shaft, a roller sleeve, and multiple mounting keys. One end of the roller shaft is rotatably connected to the frame via a bearing. The roller shaft is cylindrical and has an annular deformation cavity on its outer peripheral wall. The depth of the deformation cavity decreases from the middle to both ends. Multiple first keyways are formed on the outer peripheral walls of both ends of the roller shaft, with one of the first keyways extending to its end face. Multiple second keyways corresponding to the first keyways are formed on the inner wall of the roller sleeve. The mounting keys are respectively inserted into the first keyways and the second keyways to fix the roller sleeve to the outer peripheral wall of the roller shaft.

[0007] Preferably, a plurality of limiting plates are fixedly connected to the inner wall of the roller shaft, a central shaft is sleeved inside the roller shaft, a plurality of limiting grooves are opened on the outer peripheral wall of the central shaft, the limiting plates are slidably connected to the limiting grooves respectively, and the central shaft is connected to an external driving mechanism, which can drive the central shaft to rotate and move axially.

[0008] Preferably, a first support ring is slidably connected to the outer wall of the roller shaft, and the end of the first support ring is fixedly connected to a plurality of mounting keys. An annular limiting flange protrudes outward from the outer peripheral wall of the roller shaft. The end face of the limiting flange contacts the first support ring to limit the first support ring. A threaded portion is provided on the outer wall of the central shaft. An anti-detachment ring is threadedly connected to the central shaft through the threaded portion. The anti-detachment ring is connected to the mounting keys by bolts. The end face of the anti-detachment ring contacts the roller sleeve to limit the roller sleeve.

[0009] Preferably, the electrode sheet imprinting device further includes a mounting sleeve. The end face of the mounting sleeve has a connecting hole, which is fitted onto the central shaft with a clearance fit. A second support ring is fixedly connected to the outer wall of the mounting sleeve. Multiple sliding cavities are formed in the inner wall of the mounting sleeve. A column is slidably connected to the inner wall of each sliding cavity. A rotating second ball is embedded in the inner end of the column. The outer end of the column passes through the mounting sleeve and extends to its outer side. A rotating third ball is embedded in the outer end of the column. A spring is fitted onto the outer wall of each column. A positioning groove is formed on the outer peripheral wall of the central shaft. When the second ball extends into the connecting hole, it abuts against the positioning groove. One end of the spring is fixedly connected to the inner wall of the mounting sleeve, and the other end is fixedly connected to the column.

[0010] Preferably, mounting holes are provided on both sides of the frame, the mounting holes are clearance-fitted with the second support ring, and a plurality of rotating first balls are embedded in the inner wall of the mounting holes, the first balls making rolling contact with the outer peripheral wall of the second support ring.

[0011] Preferably, the anti-detachment ring end face contacts the mounting sleeve. When the central shaft slides along the inner wall of the roller shaft, the anti-detachment ring drives the mounting key, the first support ring, the roller sleeve, and the second support ring to move, causing the second support ring to roll along the first ball. Before the second support ring detaches from the first ball, the anti-detachment ring rolls in contact with the outer wall of the first ball. The first ball continuously rolls along the anti-detachment ring and the roller sleeve to the outer peripheral wall of the first support ring, causing the roller sleeve to move to the outside of the frame.

[0012] Preferably, rotating rings are rotatably connected to both sides of the frame. Multiple cylinders are fixedly connected to the outer peripheral wall of the rotating rings. The output ends of the cylinders pass through the rotating rings and extend to their inner sides. Each cylinder output end is fixedly connected to a pressure block. Each pressure block end is provided with a pressure groove. Each pressure block outer wall is fixedly connected to a guide rod. The end of the guide rod passes through the rotating ring and is slidably connected to it. The pressure block engages with the outer end of the column through the pressure groove. The column is limited by the compression of the pressure groove.

[0013] Preferably, a gear ring is fixedly connected to the outer peripheral wall of the rotating ring, stepper motors are fixedly connected to both sides of the frame, an output shaft is fixedly connected to the output end of the stepper motor, and a gear is fixedly connected to the outer peripheral wall of the output shaft, the gear meshing with the gear ring.

[0014] Preferably, a heating machine, an edge trimming machine, and an unwinding machine are arranged sequentially from near to far on one side of the rolling assembly within the frame, and a winding machine is installed on the other side of the rolling assembly within the frame. The unwinding machine is used to provide the raw material for lithium battery electrode sheets to be processed. The edge trimming machine is used to cut the edges of the raw material for lithium battery electrode sheets provided by the unwinding machine to obtain electrode sheets that meet the width requirements. The heating machine is used to heat the electrode sheets after they have been processed by the edge trimming machine, so that the electrode sheets reach a suitable temperature for rolling. The rolling assembly is used to roll the electrode sheets after they have been heated by the heating machine. The winding machine is used to wind up the electrode sheets after they have been rolled by the rolling assembly to obtain the finished rolled lithium battery electrode sheets.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the design of the deformation cavity provides a dynamic and adaptive deformation compensation mechanism. Unlike the fixed pre-grinding convexity in existing technologies, the deformation and shape of the roll sleeve under the rolling force during operation can be accommodated and guided by the space between its inner wall and the deformation cavity. The compensation effect depends on the actual rolling force and adapts to different process parameters. Regardless of changes in process conditions, the roll sleeve can tend towards the ideal working profile through elastic deformation at the moment of operation, thus solving the problem of uneven thickness of the roll (thick in the middle and thin at both sides). Through the split roller shaft and roll sleeve design, the deformation cavity with gradually varying depth provides a dynamic deformation compensation space for the roll sleeve, solving the problem of uneven thickness of the roll (thick in the middle and thin at both sides). At the same time, the cooperation of the first and second keyways with the mounting key achieves the detachability of the roll sleeve, facilitating quick replacement and maintenance of the roll sleeve, solving the problem of difficult maintenance of integral rolls, and reducing maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the roller shaft of the present invention; Figure 3 This is a schematic diagram of the installation structure of the roller sleeve of the present invention; Figure 4 This is a schematic diagram of the structure of the roller shaft of the present invention; Figure 5 This is a schematic diagram of the installation structure of the mounting sleeve of the present invention; Figure 6 This is a schematic diagram of the mounting structure of the mounting key of the present invention; Figure 7 This is a schematic diagram of the anti-detachment ring structure of the present invention; Figure 8 This is a schematic diagram of the mounting structure of the central shaft of the present invention; Figure 9 This is a schematic diagram of the installation structure of the support pillar of the present invention; Figure 10 This is a schematic diagram of the installation structure of the second support ring of the present invention; Figure 11 This is a schematic diagram of the installation structure of the pressure block of the present invention.

[0018] Explanation of the labels in the diagram: 1. Frame; 101. Mounting hole; 102. First ball bearing; 2. Heating machine; 3. Edge trimming machine; 4. Unwinding machine; 5. Rewinding machine; 6. Roller; 601. Limiting plate; 602. Deformation cavity; 7. Central shaft; 701. Threaded part; 702. Limiting groove; 8. Limiting flange; 9. First keyway; 10. Positioning groove; 11. First support ring; 12. Mounting key; 13. 14. Roller sleeve; 15. Second keyway; 16. Anti-detachment ring; 17. Rotating ring; 18. Cylinder; 19. Guide rod; 10. Pressure block; 1901. Pressure groove; 20. Gear ring; 21. Stepper motor; 22. Output shaft; 23. Gear; 24. Mounting sleeve; 25. Second support ring; 26. Connecting hole; 27. Slide cavity; 28. Column; 29. ​​Second ball; 30. Spring; 31. Third ball. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] like Figures 1-6 As shown, an electrode sheet imprinting device for lithium batteries of new energy vehicles includes a frame 1. Two roller pressing assemblies are installed inside the frame 1. The roller pressing assembly includes a roller shaft 6, a roller sleeve 13, and multiple mounting keys 12. One end of the roller shaft 6 is rotatably connected to the frame 1 through a bearing. The roller shaft 6 is cylindrical, and its outer peripheral wall is provided with an annular deformation cavity 602. The depth of the deformation cavity 602 decreases from the middle to both ends. Multiple first keyways 9 are opened on the outer peripheral walls at both ends of the roller shaft 6. One of the first keyways 9 at one end extends to its end face. Multiple second keyways 14 corresponding to the first keyways 9 are opened on the inner wall of the roller sleeve 13. The mounting keys 12 are respectively inserted into the first keyways 9 and the second keyways 14 to fix the roller sleeve 13 to the outer peripheral wall of the roller shaft 6.

[0021] In this invention, the design of the split roller shaft 6 and roller sleeve 13, with the use of the gradually changing depth deformation cavity 602 to provide dynamic deformation compensation space for the roller sleeve 13, can solve the problem of uneven thickness of the roll, which is thicker in the middle and thinner at both sides. At the same time, the cooperation between the first keyway 9 and the second keyway 14 and the mounting key 12 realizes the detachability of the roller sleeve 13, which facilitates the quick replacement and maintenance of the roller sleeve 13 and solves the problem of difficult maintenance of integral rolls.

[0022] In this invention, the traditional integral roll is decomposed into an internal roll shaft 6 and an external roll sleeve 13. The roll shaft 6 is transformed into a torque transmission and support, while the roll sleeve 13 directly contacts the electrode sheet to complete the rolling process and allows for controllable and beneficial deformation.

[0023] The deformation is applied to the roller sleeve 13. The design of this structure acknowledges the inevitable physical fact of deformation, but guides and confines it to the roller sleeve 13. This makes the roller sleeve 13 a controllable deformable body, protecting the roller shaft 6.

[0024] An annular deformation cavity 602 is provided on the outer peripheral wall of the roller 6, with its depth decreasing from the middle to both ends. This deformation cavity 602 creates a non-uniform gap between the inner wall of the roller sleeve 13 and the outer wall of the roller 6. When the roller sleeve 13 is compressed, its inner wall can elastically "bulge" into this gap. The deformation space is largest in the middle of the roller sleeve 13 and decreases towards both ends. This is contrary to the convex deformation trend caused by the rolling force. Under working pressure, the deformation of the roller sleeve 13 is guided by the deformation cavity 602, automatically compensating for the convex trend and making its outer surface more flat, thereby obtaining a uniform roll gap.

[0025] The roller sleeve 13 is fixed to the roller shaft 6 by the cooperation of the first keyway 9, the second keyway 14, and the mounting key 12. The mounting key 12 ensures that torque can be transmitted from the roller shaft 6 to the roller sleeve 13 without slippage. When the roller sleeve 13 is worn or needs to be replaced with a different specification, there is no need to disassemble the heavy roller shaft 6. Simply release the lock of the mounting key 12 to slide the old roller sleeve 13 off the roller shaft 6, replace it with a new roller sleeve, and re-fix it.

[0026] like Figure 8 As shown, multiple limiting plates 601 are fixedly connected to the inner wall of the roller shaft 6. A central shaft 7 is sleeved inside the roller shaft 6. Multiple limiting grooves 702 are opened on the outer peripheral wall of the central shaft 7. The limiting plates 601 are slidably connected to the limiting grooves 702 respectively. The central shaft 7 is connected to an external driving mechanism. The external driving mechanism can drive the central shaft 7 to rotate and move axially.

[0027] The external drive mechanism needs to drive the central shaft 7 to rotate circumferentially and slide axially. The drive components in the external drive mechanism include a hydraulic cylinder and a motor. An output gear is fixed at the output end of the motor. A transmission gear is provided on the outer wall of the central shaft 7. A protrusion is fixed on the inner wall of the transmission gear. The protrusion slides with the limiting groove 702. The motor drives the transmission gear to rotate through the output gear. The transmission gear drives the central shaft 7 to rotate through the cooperation of the protrusion and the limiting groove 702. The hydraulic cylinder is fixed to the end of the central shaft 7 and drives the central shaft 7 to slide axially.

[0028] like Figure 5 and Figure 6As shown, a first support ring 11 is slidably connected to the outer wall of the roller shaft 6. The end of the first support ring 11 is fixedly connected to multiple mounting keys 12. An annular limiting flange 8 protrudes outward from the outer peripheral wall of the roller shaft 6. The end face of the limiting flange 8 contacts the first support ring 11 to limit the first support ring 11. A threaded part 701 is provided on the outer wall of the central shaft 7. An anti-detachment ring 15 is threadedly connected to the central shaft 7 through the threaded part 701. The anti-detachment ring 15 is connected to the mounting key 12 by bolts. The end face of the anti-detachment ring 15 contacts the roller sleeve 13 to limit the roller sleeve 13.

[0029] The anti-loosening ring 15, the first support ring 11 and the limiting flange 8 work together to ensure that the roller sleeve 13 will not loosen axially in the working state. At the same time, this mechanism is linked with the axial movement of the central shaft 7, which makes it easy to unlock.

[0030] like Figure 3 , Figure 4 , Figure 5 , Figure 9 and Figure 10 As shown, the electrode sheet imprinting device also includes a mounting sleeve 24. The end face of the mounting sleeve 24 has a connecting hole 26. The connecting hole 26 is fitted onto the central shaft 7 and has a clearance fit with it. A second support ring 25 is fixedly connected to the outer wall of the mounting sleeve 24. Multiple sliding cavities 27 are opened in the inner wall of the mounting sleeve 24. A column 28 is slidably connected to the inner wall of each sliding cavity 27. A rotating second ball 29 is embedded in the inner end of the column 28. The outer end of the column 28 passes through the mounting sleeve 24 and extends to its outer side. A rotating third ball 31 is embedded in the outer end of the column 28. A spring 30 is fitted on the outer wall of each column 28. A positioning groove 10 is opened on the outer peripheral wall of the central shaft 7. When the second ball 29 extends into the connecting hole 26, it abuts against the positioning groove 10. One end of the spring 30 is fixedly connected to the inner wall of the mounting sleeve 24, and the other end is fixedly connected to the column 28.

[0031] By installing components such as sleeve 24, column 28, spring 30, and ball bearings, the axial positioning and locking of the central shaft 7 at a specific position is achieved, preventing movement during operation.

[0032] like Figure 5 As shown, mounting holes 101 are provided on both sides of the frame 1. The mounting holes 101 are clearance-fitted with the second support ring 25. Multiple rotating first balls 102 are embedded in the inner wall of the mounting holes 101. The first balls 102 are in rolling contact with the outer peripheral wall of the second support ring 25.

[0033] When the anti-detachment ring 15 contacts the mounting sleeve 24, and the central shaft 7 slides along the inner wall of the roller shaft 6, the anti-detachment ring 15 drives the mounting key 12, the first support ring 11, the roller sleeve 13 and the second support ring 25 to move, so that the second support ring 25 rolls along the first ball 102. Before the second support ring 25 is separated from the first ball 102, the anti-detachment ring 15 rolls in contact with the outer wall of the first ball 102. The first ball 102 rolls continuously along the anti-detachment ring 15 and the roller sleeve 13 to the outer peripheral wall of the first support ring 11, so that the roller sleeve 13 moves to the outside of the frame 1.

[0034] By utilizing the continuous rolling of the first ball 102 on the surfaces of the anti-detachment ring 15, roller sleeve 13, and first support ring 11, collisions and jamming between the parts and the frame 1 are avoided when the parts are removed, ensuring smooth and safe replacement operations.

[0035] like Figure 11 As shown, rotating rings 16 are rotatably connected to both sides of the frame 1. Multiple cylinders 17 are fixedly connected to the outer peripheral wall of the rotating rings 16. The output end of the cylinders 17 passes through the rotating rings 16 and extends to its inner side. Each output end of the cylinders 17 is fixedly connected to a pressure block 19. Each pressure block 19 has a pressure groove 1901 at its end. Each pressure block 19 has a guide rod 18 fixedly connected to its outer wall. The end of the guide rod 18 passes through the rotating rings 16 and is slidably connected to them. The pressure block 19 engages with the outer end of the support column 28 through the pressure groove 1901. The support column 28 is limited by the pressure of the pressure groove 1901.

[0036] The cylinder 17 drives the pressure block 19 to press and lock the column 28, and the stepper motor 21 drives the gear ring 20 to rotate to adjust the angle of the locking mechanism, which improves the automation level and ease of operation of the equipment.

[0037] A gear ring 20 is fixedly connected to the outer peripheral wall of the rotating ring 16. Stepper motors 21 are fixedly connected to both sides of the frame 1. An output shaft 22 is fixedly connected to the output end of the stepper motor 21. A gear 23 is fixedly connected to the outer peripheral wall of the output shaft 22. The gear 23 meshes with the gear ring 20.

[0038] like Figure 1 As shown, on one side of the roll forming assembly inside the frame 1, a heating machine 2, an edge trimmer 3, and an unwinding machine 4 are arranged sequentially from near to far. On the other side of the roll forming assembly inside the frame 1, a winding machine 5 is installed. The unwinding machine 4 is used to provide the raw material of the lithium battery electrode sheet to be processed. The edge trimmer 3 is used to cut the edges of the raw material of the lithium battery electrode sheet provided by the unwinding machine 4 to obtain an electrode sheet that meets the width requirements. The heating machine 2 is used to heat the electrode sheet after it has been processed by the edge trimmer 3 so that the electrode sheet reaches a suitable temperature for roll forming. The roll forming assembly is used to roll the electrode sheet after it has been heated by the heating machine 2. The winding machine 5 is used to wind up the electrode sheet after it has been rolled by the roll forming assembly to obtain the finished rolled lithium battery electrode sheet.

[0039] Working principle: When the device is working, the external drive mechanism drives the central shaft 7 to rotate. The central shaft 7, through the limiting groove 702, cooperates with the limiting plate 601 to drive the roller shaft 6 to rotate. The roller shaft 6, through the mounting key 12, drives the roller sleeve 13 to rotate synchronously. The roller sleeves 13 of the two roller pressing assemblies cooperate with each other to press the heated electrode sheet that passes through.

[0040] During the rolling process, rolling force is applied to the roll sleeve 13, attempting to induce bending deformation. At this time, the depth of the deformation cavity 602 decreases from the center towards both ends, providing the roll sleeve 13 with a pre-defined, non-uniform deformation space. When the roll sleeve 13 is compressed, its inner wall can generate a small amount of elastic deformation matching the shape of the cavity within the deformation cavity 602, thereby dynamically offsetting the convex deformation caused by the rolling force. This ensures that the roll sleeve 13 maintains the flatness of the contact surface with the electrode sheet during operation, guaranteeing a uniform roll gap and obtaining electrode sheets of consistent thickness.

[0041] When the roller sleeve 13 needs to be replaced, multiple cylinders 17 drive the pressure block 19 to move, releasing it from the pressure on the outer end of the column 28. The external drive mechanism drives the central shaft 7 to move axially. When the central shaft 7 moves, it drives the anti-detachment ring 15, the mounting key 12, the first support ring 11, and the roller sleeve 13 to move together. Under the elastic force of the spring 30, the second ball 29 abuts against the positioning groove 10 on the central shaft 7, so that the central shaft 7 can drive the mounting sleeve 24 to move at the same time. The mounting sleeve 24 moves along the first ball. Before the second support ring 25 detaches from the first ball 102, the anti-detachment ring 15 rolls in contact with the outer wall of the first ball 102. The first ball 102 rolls continuously along the anti-detachment ring 15 and the roller sleeve 13 to the outer peripheral wall of the first support ring 11, causing the roller sleeve 13 to move to the outside of the frame 1. The second support ring 25, the anti-detachment ring 15, the roller sleeve 13, and the first support ring 11, which roll sequentially along the first ball 102, can support the fixed end of the roller shaft 6 when the central shaft 7 slides along the inner wall of the roller shaft 6.

[0042] At this point, pull the mounting sleeve 24 outward to overcome the elastic force of the spring 30, causing the second ball bearing 29 to retract and detach the mounting sleeve 24 from the central shaft 7. Then, disassemble the anti-detachment ring 15. At this time, the mounting key 12 has disengaged from the first keyway 9, and the circumferential fixation between the roller sleeve 13 and the roller shaft 6 is released. The operator can then easily remove the old roller sleeve 13 and replace it with a new one. Afterward, reverse the above steps to reset and relock the roller sleeve 13.

[0043] The cylinder 17 drives the pressure block 19 to press against the outer peripheral wall of the mounting sleeve 24. The stepper motor 21 drives the rotating ring 16 to rotate through the gear 23 and the gear ring 20, thereby causing the pressure block 19 to rotate along the outer wall of the mounting sleeve 24. The pressure groove 1901 at the end of the pressure block 19 presses the outer end of the column 28, limiting the column 28. The second ball 29 limits the central shaft 7, preventing the central shaft 7 from sliding axially. The pressure groove 1901 limits the column 28, preventing the second support ring 25 from sliding laterally along the mounting hole 101.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrode sheet imprinting device for lithium batteries in new energy vehicles, comprising a frame (1), characterized in that: Two roller pressing assemblies are installed inside the frame (1); The roller pressing assembly includes a roller shaft (6), a roller sleeve (13) and multiple mounting keys (12). One end of the roller shaft (6) is rotatably connected to the frame (1) through a bearing. The roller shaft (6) is cylindrical and has an annular deformation cavity (602) on its outer peripheral wall. The depth of the deformation cavity (602) decreases from the middle to both ends. Multiple first keyways (9) are opened on the outer peripheral walls at both ends of the roller shaft (6), and the first keyway (9) at one end extends to its end face. The inner wall of the roller sleeve (13) is provided with a plurality of second keyways (14) corresponding to the first keyway (9). The mounting key (12) is inserted into the first keyway (9) and the second keyway (14) respectively, for fixing the roller sleeve (13) to the outer peripheral wall of the roller shaft (6).

2. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 1, characterized in that: Multiple limiting plates (601) are fixedly connected to the inner wall of the roller (6). A central shaft (7) is sleeved inside the roller (6). Multiple limiting grooves (702) are opened on the outer peripheral wall of the central shaft (7). The limiting plates (601) are slidably connected to the limiting grooves (702) respectively. The central shaft (7) is connected to an external driving mechanism. The external driving mechanism can drive the central shaft (7) to rotate and move axially.

3. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 2, characterized in that: The outer wall of the roller shaft (6) is slidably connected to a first support ring (11). The end of the first support ring (11) is fixedly connected to a plurality of mounting keys (12). The outer peripheral wall of the roller shaft (6) protrudes outward to form an annular limiting flange (8). The end face of the limiting flange (8) contacts the first support ring (11) to limit the first support ring (11). The outer wall of the central shaft (7) is provided with a threaded part (701). The central shaft (7) is threadedly connected to an anti-detachment ring (15) through the threaded part (701). The anti-detachment ring (15) is connected to the mounting key (12) by bolts. The end face of the anti-detachment ring (15) contacts the roller sleeve (13) to limit the roller sleeve (13).

4. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 3, characterized in that: It also includes an installation sleeve (24), the end face of which is provided with a connecting hole (26), the connecting hole (26) is sleeved on the central shaft (7) and has a clearance fit with it, the outer wall of the installation sleeve (24) is fixedly connected with a second support ring (25), the inner wall of the installation sleeve (24) is provided with multiple sliding cavities (27), the inner wall of each sliding cavity (27) is slidably connected with a column (28), the inner end of the column (28) is embedded with a rotating second ball (29), the outer end of the column (28) passes through the installation sleeve (24) and extends to its outer side, the outer end of the column (28) is embedded with a rotating third ball (31), the outer wall of the column (28) is sleeved with a spring (30), the outer peripheral wall of the central shaft (7) is provided with a positioning groove (10), when the second ball (29) extends into the connecting hole (26), it abuts against the positioning groove (10).

5. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 4, characterized in that: One end of the spring (30) is fixedly connected to the inner wall of the mounting sleeve (24), and the other end is fixedly connected to the column (28).

6. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 5, characterized in that: The frame (1) has mounting holes (101) on both sides. The mounting holes (101) are fitted with the second support ring (25) with a clearance. The inner wall of the mounting holes (101) is embedded with a plurality of rotating first balls (102). The first balls (102) are in rolling contact with the outer peripheral wall of the second support ring (25).

7. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 6, characterized in that: The end face of the anti-detachment ring (15) contacts the mounting sleeve (24). When the central shaft (7) slides along the inner wall of the roller shaft (6), the anti-detachment ring (15) drives the mounting key (12), the first support ring (11), the roller sleeve (13), and the second support ring (25) to move, so that the second support ring (25) rolls along the first ball (102). Before the second support ring (25) is separated from the first ball (102), the anti-detachment ring (15) rolls in contact with the outer wall of the first ball (102). The first ball (102) rolls continuously along the anti-detachment ring (15) and the roller sleeve (13) to the outer peripheral wall of the first support ring (11), so that the roller sleeve (13) moves to the outside of the frame (1).

8. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 7, characterized in that: The frame (1) is rotatably connected to both sides of a rotating ring (16). Multiple cylinders (17) are fixedly connected to the outer peripheral wall of the rotating ring (16). The output end of the cylinder (17) passes through the rotating ring (16) and extends to its inner side. Each output end of the cylinder (17) is fixedly connected to a pressure block (19). Each end of the pressure block (19) is provided with a pressure groove (1901). Each outer wall of the pressure block (19) is fixedly connected to a guide rod (18). The end of the guide rod (18) passes through the rotating ring (16) and is slidably connected to it. The pressure block (19) is engaged with the outer end of the column (28) through the pressure groove (1901). The column (28) is limited by the pressure of the pressure groove (1901).

9. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 8, characterized in that: A gear ring (20) is fixedly connected to the outer peripheral wall of the rotating ring (16). Stepper motors (21) are fixedly connected to both sides of the frame (1). An output shaft (22) is fixedly connected to the output end of the stepper motor (21). A gear (23) is fixedly connected to the outer peripheral wall of the output shaft (22). The gear (23) meshes with the gear ring (20).

10. The electrode sheet imprinting device for lithium batteries in new energy vehicles according to claim 9, characterized in that: The frame (1) has a heating machine (2), a trimming machine (3) and an unwinding machine (4) arranged sequentially from near to far on one side of the rolling assembly. The frame (1) has a winding machine (5) installed on the other side of the rolling assembly. The unwinding machine (4) is used to provide the raw material of the lithium battery electrode sheet to be processed. The trimming machine (3) is used to cut the edge of the raw material of the lithium battery electrode sheet provided by the unwinding machine (4) to obtain an electrode sheet that meets the width requirements. The heating machine (2) is used to heat the electrode sheet after it has been processed by the trimming machine (3) so that the electrode sheet reaches a suitable rolling temperature. The rolling assembly is used to roll the electrode sheet after it has been heated by the heating machine (2). The winding machine (5) is used to wind up the electrode sheet after it has been rolled by the rolling assembly to obtain the finished lithium battery electrode sheet after rolling.

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