A positive electrode pressing device for a power battery

Abstract

The present invention relates to a positive electrode pressing device for a power battery, the pressing device comprises a base, a turntable is provided on the upper surface of the base, a plurality of stamping parts are provided on the turntable, a plurality of clamping parts are provided on the side wall of the base, a motor is provided in the base, a transmission shaft of the motor passes through the base and is fixedly connected to the turntable, a pole piece to be stamped is placed on each clamping part, and the pole piece is tightened by the clamping part, then the stamping part performs stamping work on the pole piece to be stamped, and the clamping part releases the pole piece after the stamping is completed, and then the staff replaces the pole piece. Compared with the current partial manual operation method of tightening the pole piece, the clamping part in the present invention can perform the tightening work more conveniently. At the same time, compared with the existing partial pressing device which only relies on the staff to tighten, release and change materials in sequence under the stamping die, the present invention improves the stamping frequency through the mutual cooperation between the turntable, the clamping part and the stamping part, thereby improving the working efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and more specifically to a positive electrode pressing device for a power battery. Background Art

[0002] Power batteries are battery devices used to provide power. Due to their intelligent and energy-saving features, they are widely used in various fields, thereby driving the development of related industries.

[0003] Because the power battery needs to meet the required power supply, the power battery needs to be equipped with a positive electrode and a negative electrode respectively responsible for current input and output; At present, in the production process of some power batteries, when the positive and negative pole pieces are stamped, because the surface of the pole piece is relatively smooth, the pole piece is prone to position displacement during the process of the stamping die contacting the pole piece and applying pressure to it, resulting in problems such as the pole piece after being stamped cannot be used normally, resulting in an increase in the probability of defective products. Therefore, the staff added a clamp for fixing the pole piece to the tablet pressing device to achieve the limiting effect of the pole piece. When in use, the staff first placed the pole piece on the clamp, and then manually controlled the clamp to fix the pole piece. After completing the stamping work, the clamp still needs to be released by manually opening it to take the pole piece after the stamping is completed. This operation step of tightening and releasing the clamp reduces the work efficiency. At the same time, after completing a stamping operation, the staff replaced the pole piece on the clamp, which reduced the stamping frequency and further affected the work efficiency.

[0004] Therefore, there is a need for a tablet pressing device that reduces the number of manual operation steps for workers and increases the stamping frequency, thereby improving the work efficiency during pole piece stamping. Summary of the invention

[0005] The object of the present invention is to provide a positive electrode pressing device for a power battery to solve the problems raised in the background technology.

[0006] To achieve the above object, the present invention provides a positive electrode pressing device for a power battery, comprising a base, a turntable is provided on the upper surface of the base, N stamping parts are provided on the turntable, a plurality of clamping parts are provided on the side wall of the base, a motor is provided in the base, a transmission shaft of the motor passes through the base and is fixedly connected to the turntable, and N is greater than or equal to 1;

[0007] Each clamping part comprises a first support block fixedly connected to the rotating disk, each first support block is provided with a torque motor, the free end of each torque motor transmission shaft is fixedly connected to a transmission block, each transmission block is rotatably connected to four connecting rods, one end of each connecting rod away from the transmission block is rotatably connected to a slider, and each slider is fixedly connected to a fixed rod;

[0008] Each stamping part includes an L-shaped support rod, the long arm of each support rod is fixedly connected to the base, and the short arms extend to the top of the clamping part. An airbag and a stamping module are fixedly connected to the lower surface of the short arm of each support rod in sequence, and an air pump connected to the corresponding airbag is installed on each support rod.

[0009] Furthermore, the number of the clamping parts is N times 2, and the clamping part also includes a second support block arranged above the transmission block, and a plurality of support plates are fixedly connected to the side wall of the second support block, and the support plates are fixedly connected to the first support block.

[0010] Furthermore, four slide grooves are provided on the upper surface of each first support block, and the four slide grooves are arranged equidistantly around the torque motor as the center. The four sliders correspond one-to-one to the four slide grooves, and the second support block is provided with through grooves corresponding one-to-one to the four fixing rods.

[0011] Furthermore, the stamping part also includes a limit rod, a limit hole matched with the limit rod is opened on the short arm of the support rod, the limit rod passes through the limit hole and is fixedly connected to the stamping module, and a spring is sleeved on the outer surface of the limit rod, and both ends of the spring are respectively fixedly connected to the stamping module and the short arm of the support rod.

[0012] Furthermore, the airbag is annular, the spring is arranged at the inner circle position of the airbag, and the inner circle diameter of the airbag is larger than the outer circle diameter of the spring.

[0013] Furthermore, each first support block has a recessed groove, and each torque motor is installed in a corresponding groove.

[0014] Furthermore, a protrusion is integrally formed on one side of each slider, and the rotation connection point between the slider and the corresponding connecting rod is arranged on the protrusion;

[0015] The transmission block is rectangular, and the four side walls of the transmission block are all inwardly concave arcs, and the rotation connection points between the transmission block and the corresponding connecting rod are set at the four vertex positions of the transmission block;

[0016] Each connecting rod is arranged in an arc shape.

[0017] Furthermore, the first support blocks are arranged on the turntable at equal intervals in the circumferential direction with the perpendicular bisector of the turntable as the center of the circle.

[0018] Furthermore, a magnetic induction sensor is installed on each first support block, and a first magnet and a second magnet are provided on the base between two adjacent stamping parts and in sequence along the rotation direction of the turntable. Each first magnet and each second magnet are installed on an installation module, and each installation module is fixedly connected to the side wall of the base.

[0019] A controller and a battery connected to each magnetic induction sensor are installed on the turntable. The battery and the controller are connected to each other, and the battery and the controller are respectively connected to each torque motor.

[0020] Furthermore, a third magnet is fixedly connected to one side of the long arm of each support rod opposite to the turntable, and a signal receiver connected to the air pump on the support rod is mounted on each support rod.

[0021] Compared with the prior art, the present invention has the following significant advantages:

[0022] 1. The torque motor drives the transmission block to rotate, thereby driving the corresponding connecting rod and slider to move in turn, so as to achieve the effect of limiting the stamped pole piece with the fixed rod. Compared with the existing method of manually adjusting the clamp by the staff, this solution improves the efficiency of clamping and releasing the pole piece, thereby improving the stamping efficiency of the equipment for the pole piece; by driving the turntable to rotate by the motor, the staff can replace the pole piece in the clamping part that has not been stamped, so as to increase the stamping frequency and further improve the working efficiency of the equipment.

[0023] 2. Through the cooperation between the controller, magnetic induction sensor, signal receiver, first magnet, second magnet and third magnet, the magnetic induction sensor senses magnetic signals at different positions, so that the controller issues different instructions to assist in the limiting, stamping and releasing of the pole piece. Compared with the prior art, the staff performs the pole piece replacement operation under the same stamping die, which improves the efficiency of pole piece replacement and further improves the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the main figure of the present invention;

[0025] Figure 2 The present invention Figure 1 A in the enlarged view;

[0026] Figure 3 is a side sectional view of the clamping portion of the present invention;

[0027] Figure 4a is a top view of the clamping portion of the present invention when it is released;

[0028] Figure 4b is a top view of the clamping portion of the present invention when it is tightened;

[0029] Figure 5 is a side view of the stamping portion of the present invention;

[0030] Figure 6 It is a side sectional view of the base of the present invention.

[0031] In the figure: 1. base; 11. turntable; 12. motor; 2. clamping part; 21. first support block; 22. torque motor; 23. transmission block; 24. connecting rod; 25. slider; 251. protrusion; 26. fixing rod; 27. second support block; 271. through groove; 28. support plate; 29. ​​slide groove; 3. stamping part; 31. support rod; 32. airbag; 33. stamping module; 34. air pump; 35. limit rod; 36. limit hole; 37. spring; 4. magnetic induction sensor; 5. first magnet; 6. second magnet; 7. installation module; 8. battery. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0033] like Figure 1-6 As shown, the present invention provides a positive electrode pressing device for a power battery, comprising a base 1, a turntable 11 is provided on the upper surface of the base 1, N stamping parts 3 are provided on the turntable 11, a plurality of clamping parts 2 are provided on the side wall of the base 1, a motor 12 is provided in the base 1, a transmission shaft of the motor 12 passes through the base 1 and is fixedly connected to the turntable 11; each clamping part 2 comprises a first support block 21 fixedly connected to the turntable 11, each first support block 21 is provided with a torque motor 22, a free end of the transmission shaft of each torque motor 22 is fixedly connected to a transmission block 23, and each transmission block 2 3 are rotatably connected with four connecting rods 24, and one end of each connecting rod 24 away from the transmission block 23 is rotatably connected with a slider 25, and each slider 25 is fixedly connected with a fixing rod 26; each stamping part 3 includes an L-shaped support rod 31, the long arm of each support rod 31 is fixedly connected to the base 1, and the short arm extends to the top of the clamping part 2, and the lower surface of the short arm of each support rod 31 is fixedly connected with an air bag 32 and a stamping module 33 in sequence, and each support rod 31 is respectively installed with an air pump 34 connected with the corresponding air bag 32, and N is greater than or equal to 1.

[0034] Taking clockwise as an example, the staff places the pole piece to be stamped on a clamping part 2, and then the transmission shaft of the torque motor 22 drives the transmission block 23 to rotate clockwise. At the same time, the four connecting rods 24 connected thereto drive the corresponding sliders 25 and the fixing rods 26 on the sliders 25 to move inward respectively, until the pole piece to be stamped is clamped, so as to achieve the limiting and fixing effect of the pole piece. Then the motor 12 drives the turntable 11 to rotate clockwise, and moves the clamping part 2 loaded with the pole piece to the bottom of a stamping part 3. At this time, the motor 12 stops rotating and the air pump 34 starts to inflate the airbag 32, so that the stamping die descends at a uniform speed until it contacts the surface of the pole piece and completes the stamping of the pole piece. After the stamping is completed, the air pump 34 discharges the gas in the airbag 32. At this time, the airbag 32 shrinks and drives the stamping die to move up. Then the motor 12 drives the turntable 11 and the clamping part 2 on the turntable 11 to rotate clockwise again until the clamping part 2 moves out of the position below the stamping part 3. Then the transmission shaft of the torque motor 22 on the clamping part 2 drives the transmission block 23 to rotate counterclockwise, and the connecting rod 24 connected thereto pushes the slider 25 and the fixed rod 26 on the slider 25 away from the pole piece after the stamping. Then the staff takes out the pole piece after the stamping and places the pole piece to be stamped. During the operation of the stamping part 3, the staff repeats the above-mentioned first step of placing the pole piece to be stamped, and transfers the pole piece to be stamped to the next clamping part 2, that is, the next clamping part 2 on the turntable 11 in the counterclockwise direction of the rotation direction of the motor 12.

[0035] In one embodiment, the motor 12 in the present invention adopts a stepper motor 12, which can convert pulses into mechanical motion and realize the control of the rotation direction, speed and rotation angle. The air pump 34 adopts a micro vacuum air pump 34 to realize the filling and deflation of the air bag 32. The torque motor 22 can stop and hold after contacting the pole piece to be stamped, and then continue to hold the pole piece to be stamped. At the same time, the torque motor 22 is small in size, which can reduce its occupied space and improve the flexibility of the equipment.

[0036] In one embodiment, after the motor 12 rotates a certain angle each time, it will rotate again after a preset time.

[0037] It should be noted that the stepper motor 12, the torque motor 22 and the micro vacuum air pump 34 are all devices well known to the public in the prior art, so their specific internal structures and working principles are not described in detail herein.

[0038] In one embodiment, the staff sets the program according to the number of the clamping parts 2 and the stamping parts 3 to control the angle of each rotation of the motor 12, so that after each rotation, a certain clamping part 2 can accurately rotate below the stamping part 3, so as to achieve mutual alignment between the stamped pole piece and the stamping module 33. At the same time, the number of rotations or angles of the torque motor 22 can be controlled according to the shape and size of the pole piece to adapt to the size of different pole pieces.

[0039] In one embodiment, the number of the clamping parts 2 is N times 2. Compared with the existing partial tablet pressing device, because it has only one pole piece placement slot set under the stamping die, the staff needs to replace the pole piece under the stamping die each time, which reduces the safety factor; at the same time, the staff needs to manually clamp or release the clamp for clamping the pole piece before and after each stamping, thereby reducing the stamping frequency and further reducing the working efficiency of the equipment. The stamping part 3 in the present invention cooperates with the clamping parts 2 of N times 2. When N is 1, the number of the clamping parts 2 is 2, and the staff can perform pole piece replacement operations on the clamping parts 2 that are not under the stamping part 3, thereby improving the working efficiency of the equipment.

[0040] In one embodiment, the stamping portion 3 is equidistantly arranged on the side wall of the base 1 with the perpendicular midline of the base 1 as the center; the first support block 21 is equidistantly arranged on the turntable 11 with the perpendicular midline of the turntable 11 as the center.

[0041] In one embodiment, if the pole piece is placed directly on the transmission block 23, when the torque motor 22 drives the transmission block 23 to rotate, the pole piece will rotate along with the rotating block, which may easily cause the pole piece to shift in position; therefore, a second support block 27 is provided above the transmission block 23, and a plurality of support plates 28 are fixedly connected to the side wall of the second support block 27, and the support plates 28 are fixedly connected to the first support block 21. The staff can place the pole piece on the second support block 27 to avoid direct contact between the pole piece and the transmission block 23. At the same time, when the pole piece is placed on the transmission block 23, damage to the output end of the motor 12 during the stamping process of the stamping part 3 is avoided, thereby improving the service life of the equipment.

[0042] In one embodiment, both ends of the support plate 28 are respectively fixedly connected to the first support block 21 and the second support block 27 near the top corners, thereby satisfying the support effect for the second support block 27 while avoiding collision with the slider 25 or the fixing rod 26 .

[0043] In one embodiment, four slide grooves 29 are provided on the upper surface of each first support block 21. The four slide grooves 29 are arranged equidistantly in the circumferential direction with the torque motor 22 as the center. The four sliders 25 correspond to the four slide grooves 29 one by one, so that the pole piece placed on the second support block 27 is located in the space surrounded by the four fixed rods 26, so as to better achieve the limiting effect of the pole piece, improve work efficiency, and effectively reduce the probability of defective products. At the same time, the slide groove 29 can limit the slider 25 to improve the stability of the slider 25 and the fixed rod 26 during the movement.

[0044] like Figure 4a , 4b As shown, the four slide grooves 29 on each first support block 21 correspond to the edges of the corresponding first support block 21. However, it should be noted that the four slide grooves 49 on the first support block 21 are not limited to correspond to the edges of the first support block 21, and the slide grooves 29 can be arranged at any position on the first support block 21, which only needs to be arranged equidistantly in the circumferential direction with the torque motor 22 as the center.

[0045] In one embodiment, the shapes of the first support block 21 and the second support block 27 are not limited to quadrilaterals, and may be circular or other polygonal shapes, and are preferably quadrilaterals in the present invention.

[0046] In one embodiment, the second support block 27 is provided with through slots 271 corresponding to the four fixing rods 26 one by one. The through slots 271 prevent the fixing rods 26 from encountering any obstacles when moving, thereby successfully completing the clamping effect of the pole piece.

[0047] In one embodiment, in order to enable the stamping part 3 to work stably and smoothly, a limiting hole 36 matched with the limiting rod 35 is opened on the short arm of the support rod 31, and a limiting rod 35 passing through the limiting hole 36 is additionally provided to be fixedly connected to the stamping module 33. Through the mutual cooperation between the limiting hole 36 and the limiting rod 35, the working stamping module 33 is limited so that it can move on a fixed path, thereby reducing the probability of defective pole pieces and improving the stamping efficiency of the stamping part 3.

[0048] In one embodiment, a spring 37 is sleeved on the outer surface of the limit rod 35, and the two ends of the spring 37 are respectively fixed to the stamping module 33 and the short arm of the support rod 31. Considering the particularity of the airbag 32 itself being in an unfixed shape, when the airbag 32 is not filled with gas, it is easy for the stamping die to move up to a distance less than the expected distance, thereby causing the equipment to be unable to continue to work. The additional spring 37 can assist the stamping die to move up, so that it can be reset after completing a certain stamping work, ensuring that the subsequent work of the equipment can proceed smoothly. At the same time, the spring 37 can improve the release efficiency of the gas in the airbag 32 during the rebound process, thereby improving the stamping efficiency of the equipment.

[0049] In one embodiment, the airbag 32 is annular, and the spring 37 is disposed at the inner circle of the airbag 32, and the inner circle diameter of the airbag 32 is larger than the outer circle diameter of the spring 37. This method avoids contact between the spring 37 and the airbag 32, thereby preventing the spring 37 from clamping the airbag 32 during the rebound process and causing damage to the airbag 32.

[0050] In one embodiment, a plurality of arc-shaped plates are fixedly connected to the inner circle of the annular airbag 32. When the air pump 34 inflates the airbag 32, the volume of the airbag 32 gradually increases. The plurality of arc-shaped plates can further prevent contact between the surface of the airbag 32 and the spring 37, thereby preventing the airbag 32 from being squeezed into the gap of the spring 37, thereby avoiding the squeezing of the airbag 32 that may be caused by the spring 37 during the resetting process.

[0051] In one embodiment, each first support block 21 is provided with a recessed groove, and each torque motor 22 is installed in a corresponding recessed groove, and the side wall of the recess is in contact with the outer surface of the torque motor 22. The recessed groove can fix the torque motor 22, reduce the vibration generated by the torque motor 22 during operation, and reduce the height of the transmission block 23 and the second support block 27 from the turntable 11, thereby improving the stability of the pole piece during stamping.

[0052] In one embodiment, a protrusion 251 is integrally formed on one side of each slider 25, and the rotation connection point between the slider 25 and the corresponding connecting rod 24 is arranged on the protrusion 251; each connecting rod 24 is arranged in an arc shape; the transmission block 23 is rectangular, and the four side walls of the transmission block 23 are all arc-shaped and concave inward, and the rotation connection points between the transmission block 23 and the corresponding connecting rod 24 are arranged at the four top corners of the transmission block 23.

[0053] The protrusion 251 cooperates with the arc-shaped connecting rod 24, so that the connection between the transmission block 23 and the slider 25 is not a linear connection, and the connecting rod 24 will not come into contact with the transmission block 23 during the rotation of the transmission block 23, thereby avoiding the situation where the clamping part 2 is stuck due to the collision of parts during operation. At the same time, the concave arc of the side wall further avoids the possibility of collision between the connecting rod 24 and the transmission block 23, thereby improving the safety and efficiency of the equipment.

[0054] In one embodiment, the rotation connection point between the transmission block 23 and the connecting rod 24 is located on the lower surface of the transmission block 23, so that the connection point between the connecting rod 24 and the slider 25 is closer to the bottom surface of the slider 25, so that the slider 25 can move more smoothly.

[0055] In one embodiment, the upper surface of the base 1 is provided with a plurality of placement grooves, each of which is provided with a roller, and the two ends of each roller are rotatably connected to the two ends of the corresponding placement groove, and the surface of each roller is in contact with the lower surface of the turntable 11. In this way, the rotation efficiency of the turntable 11 is improved, and the vibration generated by the turntable 11 during the rotation process is reduced. In addition, the turntable 11 can be supported when the stamping part 3 is working to avoid damage to the equipment.

[0056] In one embodiment, the placement grooves on the base 1 are circumferentially arranged on the upper surface of the base 1 with the motor 12 as the center.

[0057] The number of the clamping parts 2 is N times 2, and a magnetic induction sensor 4 is installed on each first support block 21. A first magnet 5 and a second magnet 6 are arranged on the base 1 between two adjacent stamping parts 3 and in sequence along the rotation direction of the turntable 11. Each first magnet 5 and each second magnet 6 are respectively installed on a mounting module 7, and each mounting module 7 is fixedly connected to the side wall of the base 1.

[0058] In one embodiment, a magnetic induction sensor 4 is respectively installed on each first support block 21, and a first magnet 5 and a second magnet 6 are provided on the base 1 between two adjacent stamping parts 3 and in sequence along the rotation direction of the turntable 11, each first magnet 5 and each second magnet 6 are respectively installed on a mounting module 7, and each mounting module 7 is fixedly connected to the side wall of the base 1; a controller and a battery 8 connected to each magnetic induction sensor 4 are installed on the turntable 11, the battery 8 is connected to the controller, and the battery 8 and the controller are respectively connected to each torque motor 22.

[0059] In one embodiment, the first magnets 5 and the second magnets 6 between two adjacent stamping parts 3 are arranged at equal distances.

[0060] In one embodiment, a third magnet is fixedly connected to one side of the long arm of each support rod 31 opposite to the turntable 11, and a signal receiver connected to the air pump 34 on the support rod 31 is installed on each support rod 31. The signal receiver receives wireless signals sent by the controller and converts these signals into corresponding electrical signals, thereby starting the air pump 34.

[0061] It should be noted that the signal receiver is an existing technology well known to the public, so its specific internal structure and working principle will not be further elaborated in this article.

[0062] A first magnet 5, a second magnet 6 and a third magnet with different magnetic properties are provided, so that the magnetic induction sensor 4 transmits different signals to the controller, so that the controller can issue different instructions. It should be noted that the controller is preset with instructions corresponding to different signals. When the first magnet 5 is sensed, the corresponding clamping part 2 is controlled to release the pole piece. When the second magnet 6 is sensed, the corresponding clamping part 2 is controlled to clamp the pole piece. When the magnetic induction sensor 4 senses the third magnet, the air pump 34 is controlled to start, and gas is rushed into the airbag 32. After a preset time, the air pump 34 starts to exhaust the inside of the airbag 32.

[0063] In one embodiment, a starting switch connected to the motor 12 is provided on the base 1 .

[0064] In one embodiment, a through hole is provided on one side of the base 1, and the electrical connection line of the motor 12 passes through the through hole and is connected to the power supply interface. The electrical connection line of the air pump 34 can be fixed to the support rod 31 by Velcro or a binding tape to prevent it from contacting the turntable 11 or the clamping part 2 and causing equipment failure, thereby improving the safety and efficiency of the equipment.

[0065] Take N equal to 2 as an example. At this time, the number of stamping parts 3 on the base 1 is 2, and the number of clamping parts 2 is 4. At this time, the first magnet 5, the second magnet 6 and the third magnet are used as a stopping point to evenly divide the rotation angle of the motor 12. At this time, the rotation angle of the motor 12 is 30 degrees each time.

[0066] When in use, the staff first places the pole piece to be punched on the clamping part 2 corresponding to the first magnet 5, and then controls the motor 12 to start working through the start switch on the base 1. The motor 12 drives the turntable 11 to rotate clockwise 30 degrees, and rotates the above-mentioned clamping part 2 on which the pole piece to be punched is placed to the position of the second magnet 6. At this time, the magnetic induction sensor 4 on the clamping part 2 senses the second magnet 6 and transmits a signal to the controller. Then the controller issues an instruction to the torque motor 22 on the clamping part 2, so that the torque motor 22 drives the transmission block 23 above it to rotate clockwise. At this time, the connecting rod 24 connected to the transmission block 23 drives the connected slider 25 to approach the pole piece to be punched along the slide groove 29 at a uniform speed until the surface of the fixing rod 26 contacts the pole piece and clamps the pole piece. After the preset time, the motor 12 starts working again, driving the turntable 11 to drive the clamping part 2 above it to rotate clockwise 30 degrees again, so that the clamping part 2 that completes the pole piece clamping process rotates to the bottom of a certain stamping part 3. At this time, the magnetic induction sensor 4 senses the third magnet and transmits a signal to the controller. Then, the controller sends an instruction to the signal receiver to control the air pump 34 to start and inflate the inside of the airbag 32. During the expansion process of the airbag 32 and the limit of the limit rod 35, the stamping die moves vertically downward at a uniform speed until the stamping die contacts the pole piece to be stamped and continues to move downward until the stamping of the pole piece is completed. After the preset time, the air pump 34 stops inflating the airbag 32 and discharges the gas injected into the airbag 32. At the same time, under the reset of the spring 37, the stamping die rises at a uniform speed until the stamping die returns to the initial state. Then, the motor 12 rotates clockwise 30 degrees again, driving the stamping part 3 to move to the position of the next first magnet 5. At this time, the magnetic induction sensor 4 senses the first magnet 5, and the controller controls the torque motor 22 to reverse. The four fixed rods 26 are pushed away from the stamped pole piece at a uniform speed by the connecting rod 24. At this time, the staff removes the stamped pole piece and places the new pole piece to be stamped on the clamping part 2, thereby completing the stamping work of a pole piece. After the preset time, the motor 12 continues to rotate 30 degrees, and continues the process of rotating the clamping part 2 to the position of the second magnet 6.

[0067] During the whole process, the motor 12 rotates clockwise by 30 degrees each time, and after completing each rotation, it continues the next rotation after a preset time.

[0068] The staff only needs to stay at the location of the first magnet 5 to replace the pole piece on the clamping part 2 each time the fixing rod 26 is opened, without performing other manual operations.

[0069] The rotation direction of the turntable 11 does not have to be clockwise, but can also be counterclockwise. It should be noted that when the turntable 11 rotates counterclockwise, the installation positions of the first magnet 5 and the second magnet 6 need to be adjusted following the rotation direction of the turntable 11 .

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A power battery positive electrode pressing device, characterized in that: The invention comprises a base (1), wherein a rotating disk (11) is provided on the upper surface of the base (1), the rotating disk (11) is provided with N punching portions (3), a plurality of clamping portions (2) are provided on the side wall of the base (1), a motor (12) is provided inside the base (1), a transmission shaft of the motor (12) passes through the base (1) and is fixedly connected to the rotating disk (11), and N is greater than or equal to 1; Each of the clamping parts (2) comprises a first support block (21) fixedly connected to the rotating disk (11), each of the first support blocks (21) is provided with a torque motor (22), the free end of the transmission shaft of each torque motor (22) is fixedly connected to a transmission block (23), each transmission block (23) is rotatably connected to four connecting rods (24), one end of each connecting rod (24) away from the transmission block (23) is rotatably connected to a sliding block (25), and each of the sliding blocks (25) is fixedly connected to a fixing rod (26); Each of the stamping parts (3) comprises an L-shaped support rod (31), the long arm of each support rod (31) is fixedly connected to the base (1), and the short arm extends to the top of the clamping part (2), and the lower surface of the short arm of each support rod (31) is fixedly connected to an air bag (32) and a stamping module (33) in sequence, and each of the support rods (31) is respectively equipped with an air pump (34) connected to the corresponding air bag (32); Four slide grooves (29) are formed on the upper surface of each of the first support blocks (21), the four slide grooves (29) are arranged equidistantly in the circumferential direction with the torque motor (22) as the center, and the four sliding blocks (25) correspond one to one with the four slide grooves (29); A protrusion (251) is integrally formed on one side of each of the sliders (25), and a rotation connection point between the slider (25) and the corresponding connecting rod (24) is arranged on the protrusion (251); The transmission block (23) is rectangular, and the four side walls of the transmission block (23) are all in the shape of arcs that are recessed inwards, and the rotational connection points between the transmission block (23) and the corresponding connecting rod (24) are arranged at the four vertex positions of the transmission block (23); Each of the connecting rods (24) is configured to be arc-shaped.

2. A power battery positive electrode pressing device according to claim 1, characterized in that: The number of the clamping parts (2) is N times 2, and the clamping parts (2) further include a second support block (27) arranged above the transmission block (23), a plurality of support plates (28) are fixedly connected to the side wall of the second support block (27), and the support plates (28) are fixedly connected to the first support block (21).

3. A power battery positive electrode pressing device according to claim 2, characterized in that: The second support block (27) is provided with through slots (271) corresponding one-to-one to the four fixing rods (26).

4. A power battery positive electrode pressing device according to claim 1, characterized in that: The stamping portion (3) further comprises a limiting rod (35); a limiting hole (36) adapted to the limiting rod (35) is formed on the short arm of the support rod (31); the limiting rod (35) passes through the limiting hole (36) and is fixedly connected to the stamping module (33); a spring (37) is sleeved on the outer surface of the limiting rod (35); two ends of the spring (37) are respectively fixedly connected to the stamping module (33) and the short arm of the support rod (31).

5. A power battery positive electrode pressing device according to claim 4, characterized in that: The airbag (32) is annular, and the spring (37) is arranged at the inner circle position of the airbag (32). The inner circle diameter of the airbag (32) is larger than the outer circle diameter of the spring (37).

6. A power battery positive electrode pressing device according to claim 1, characterized in that: Each of the first supporting blocks (21) has a recessed groove, and each of the torque motors (22) is installed in a corresponding groove.

7. A power battery positive electrode pressing device according to claim 1, characterized in that: The first support blocks (21) are arranged on the turntable (11) at equal intervals in the circumferential direction, with the perpendicular midline of the turntable (11) as the center of the circle.

8. A power battery positive electrode pressing device according to claim 1, characterized in that: A magnetic induction sensor (4) is respectively mounted on each of the first support blocks (21); a first magnet (5) and a second magnet (6) are sequentially arranged on the base (1) between two adjacent stamping portions (3) and along the rotation direction of the turntable (11); each of the first magnets (5) and each of the second magnets (6) are respectively mounted on a mounting module (7); and each of the mounting modules (7) is fixedly connected to a side wall of the base (1); The rotating disk (11) is provided with a controller and a battery (8) connected to each magnetic induction sensor (4); the battery (8) and the controller are connected to each other; and the battery (8) and the controller are respectively connected to each torque motor (22).

9. A power battery positive electrode pressing device according to claim 5, characterized in that: A third magnet is fixedly connected to a side of the long arm of each support rod (31) opposite to the turntable (11), and a signal receiver connected to an air pump (34) on the support rod (31) is mounted on each support rod (31).

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