A four-station winding mechanism

Abstract

The present invention provides a four-station winding mechanism, including a rotating seat, a transmission device and four winding needles. The rotating seat is provided with four station holes, which are evenly distributed on the circumference of the rotating axis of the rotating seat. Each station hole penetrates the rotating seat along the extension direction of the rotating axis. A winding needle is embedded in one station hole, and each winding needle can rotate around its own axis. The output end of the transmission device is respectively linked with the four winding needles, and controls each winding needle to rotate around its own axis. The third station and the fourth station of the four-station winding mechanism can decompose the action of the third station of the traditional three-station winding mechanism, thereby eliminating the waiting time after the first station and the second station complete the work, so that the four-station winding mechanism can be used for the faster battery core winding speed at the first station and the faster glue sticking speed at the second station, thereby maximizing the working efficiency of the four-station winding mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of battery production equipment, and in particular to a four-station winding mechanism. Background Art

[0002] The cell of a cylindrical lithium battery is made by winding a positive electrode sheet, a negative electrode sheet and a diaphragm, and the winding of existing cells is mostly performed by cell winding equipment, which realizes the automated production of cells and improves the production efficiency of cells. However, with the development of the lithium battery manufacturing industry, the existing cell winding equipment has gradually become unable to meet the requirements of production efficiency and has begun to fall into a bottleneck period of technological innovation. Because the production efficiency of the cell winding equipment mainly depends on the winding device, and the current winding head of the winding device is generally a three-station winding head, in which the first station is for winding the cell, the second station is for pasting the cell, and the third station is for unloading the cell, and the processing of the three stations is independent of each other.

[0003] However, the current problem in the operation of the three-station winding head is that during the processing of the third station of the winding head, it is necessary to execute steps such as extracting the first needle body and the second needle body of the winding needle, and removing the needle of the first needle body of the winding needle. Since the processing of the three stations is independent of each other, and the third station needs to remove the first needle body of the winding needle after extracting the first needle body and the second needle body of the winding needle, the complexity and workload of the third station's actions are increased, resulting in the third station completing the work at a speed far behind the first and second stations as the winding speed of the battery cell at the first station increases and the gluing speed at the second station increases. Therefore, it is necessary to wait for the third station to complete its work before the winding head can be rotated to switch the positions of the battery cells on the three stations, which greatly limits the production efficiency of the winding device. Summary of the invention

[0004] In order to solve the above problems, the main purpose of the present invention is to provide a four-station winding mechanism with good stability and high production efficiency.

[0005] In order to achieve the main purpose of the present invention, the present invention provides a four-station winding mechanism, which includes a rotating seat, a transmission device and four winding needles. Four station holes are arranged on the rotating seat. On the cross section of the rotating seat, the centers of the four station holes are on the same circumference, and the center of the circle is on the rotation axis of the rotating seat. Each station hole penetrates the rotating seat along the extension direction of the rotation axis. A winding needle is embedded in one station hole. Each winding needle can rotate around its own axis. The output end of the transmission device is respectively linked with the four winding needles, and respectively controls each winding needle to rotate around its own axis.

[0006] As can be seen from the above, through the structural design of the four-station winding mechanism, the four-station winding mechanism has four processing stations, among which the first station is used for the first needle body of the winding needle to remove the needle, penetrate the diaphragm, wind, and cut the diaphragm; the second station is used for the glue sticking operation of the battery cell; the third station is used for the first needle body and the second needle body of the winding needle to extract the needle to realize the unloading of the battery cell; the fourth station is used for the needle removal of the second needle body of the winding needle. The performance of the four-station winding mechanism is better than that of the traditional three-station winding mechanism. By setting the fourth station, the third station and the fourth station of the four-station winding mechanism can decompose the action of the third station of the traditional three-station winding mechanism, thereby eliminating the waiting time after the first station and the second station complete the work, so that the four-station winding mechanism can be used for the faster battery winding speed at the first station and the faster glue sticking speed at the second station, thereby maximizing the working efficiency of the four-station winding mechanism.

[0007] A further solution is that the four-station winding mechanism also includes a connecting frame and four ejector mechanisms, the connecting frame is installed on the rotating seat, each ejector mechanism includes an ejector seat and an ejector, the ejector seat is fixedly connected to the connecting frame, the ejector is installed on the ejector seat, the ejector is arranged toward the needle outlet of the winding needle, and the ejector of an ejector seat is coaxially arranged with a winding needle.

[0008] As can be seen from the above, the ejector mechanism is used to support the winding needle to prevent the winding needle from being deformed due to excessive pressure, and to ensure the winding accuracy of the battery cell during the winding process of the battery cell and the gluing accuracy during the gluing process of the battery cell.

[0009] A further solution is that the transmission device includes a first shaft, a second shaft, a third shaft and a fourth shaft, the first end of the first shaft is fixedly connected to the first pulley, the second end of the first shaft is fixedly connected to the first gear, the first pulley is coaxially arranged with the first shaft, the first gear is coaxially arranged with the first shaft, the first end of the second shaft is fixedly connected to the second pulley, the second end of the second shaft is fixedly connected to the second gear, the second pulley is coaxially arranged with the second shaft, the second gear is coaxially arranged with the second shaft, the second shaft is sleeved on the first shaft, the length of the second shaft is smaller than the length of the first shaft, the first end of the third shaft is fixedly connected to the third pulley, the second end of the third shaft is fixedly connected to the third gear, the third pulley is The three shafts are coaxially arranged, the third gear is coaxially arranged with the third shaft, the third shaft is sleeved on the second shaft, the length of the third shaft is less than the length of the second shaft, the first end of the fourth shaft is fixedly connected with the fourth pulley, the second end of the fourth shaft is fixedly connected with the fourth gear, the fourth pulley is coaxially arranged with the fourth shaft, the fourth gear is coaxially arranged with the fourth shaft, the fourth shaft is sleeved on the third shaft, the length of the fourth shaft is less than the length of the third shaft, and the fifth gear is fixedly arranged on the winding needle, the first gear is meshed with the fifth gear on the first winding needle, the second gear is meshed with the fifth gear on the second winding needle, the third gear is meshed with the fifth gear on the third winding needle, and the fourth gear is meshed with the fifth gear on the fourth winding needle.

[0010] A further solution is that the four-station winding mechanism also includes a driving device, which includes a first motor, a second motor, a third motor and a fourth motor, the motor shaft of the first motor is provided with a fifth pulley, and the fifth pulley is connected to the first pulley through a first transmission belt, the motor shaft of the second motor is provided with a sixth pulley, and the sixth pulley is connected to the second pulley through a second transmission belt, the motor shaft of the third motor is provided with a seventh pulley, and the seventh pulley is connected to the third pulley through a third transmission belt, and the motor shaft of the fourth motor is provided with an eighth pulley, and the eighth pulley is connected to the fourth pulley through a fourth transmission belt.

[0011] It can be seen from the above that, through the structural design of the transmission device and the driving device, the need to install the driving device on the rotating seat is avoided, the load of the four-station winding mechanism is effectively reduced, the inertia of the four-station winding mechanism is avoided to be excessive, and when the driving device of the battery cell winding device drives the four-station winding mechanism to rotate, the four-station winding mechanism can respond faster.

[0012] A further solution is that the first pulley, the second pulley, the third pulley, the fourth pulley, the fifth pulley, the sixth pulley, the seventh pulley and the eighth pulley are all synchronous pulleys, and the first drive belt, the second drive belt, the third drive belt and the fourth drive belt are all synchronous belts.

[0013] As can be seen from the above, the synchronous pulley and the synchronous belt can improve the driving accuracy of the driving device to the transmission device and ensure the winding accuracy of the winding needle.

[0014] A further solution is that the first motor, the second motor, the third motor and the fourth motor are all stepper motors; or the first motor, the second motor, the third motor and the fourth motor are all servo motors.

[0015] It can be seen from the above that using a stepper motor or a servo motor as the driving source of the driving device can effectively improve the winding accuracy of the winding needle.

[0016] A further solution is that the winding needle includes a cylinder, a first needle body and a second needle body. The cylinder is rotatably installed in the work station hole around an axis, the first needle body is slidably installed in the cylinder along the axis, a first end of the first needle body is provided with a first insertion pin facing outside the cylinder, the second needle body is slidably installed in the cylinder along the axis, and a second insertion pin is provided at the first end of the second needle body facing outside the cylinder.

[0017] A further solution is that a first clamping ring is provided at the second end of the first needle body, and a second clamping ring is provided at the second end of the second needle body.

[0018] As can be seen from the above, the first clamp ring and the second clamp ring can facilitate the connection of the first needle body and the second needle body of the winding needle with the driving device outside the four-station winding mechanism, thereby controlling the needle withdrawal and extraction of the winding needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the four-station winding mechanism embodiment of the present invention from the first viewing angle after omitting some components.

[0020] Figure 2 It is a structural diagram of a winding needle of an embodiment of a four-station winding mechanism of the present invention.

[0021] Figure 3 It is a structural diagram of the four-station winding mechanism embodiment of the present invention from a second viewing angle after omitting some components.

[0022] Figure 4 It is a structural diagram of the four-station winding mechanism embodiment of the present invention from a third viewing angle after omitting some components.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0024] like Figures 1 to 4 As shown, the four-station winding mechanism 100 includes a rotating seat 1, four winding needles 2, a connecting frame 31, four ejector mechanisms 32 and a transmission device 4.

[0025] The four-station winding mechanism 100 is mainly used for rolling the battery cells, gluing the rolled battery cells, and unloading the battery cells after rolling and gluing. The four-station winding mechanism 100 can be rotatably mounted on the frame of the battery cell winding equipment, and cooperate with other devices on the battery cell winding equipment to complete the above-mentioned rolling of the battery cells, gluing the rolled battery cells, and unloading the battery cells after rolling and gluing. For example, it cooperates with the electrode inserting and cutting device, the diaphragm unwinding device, and the diaphragm cutting device on the battery cell winding equipment to complete the rolling of the battery cells; cooperates with the gluing device on the battery cell winding equipment to complete the gluing of the rolled battery cells; cooperates with the unloading device on the battery cell winding equipment to complete the unloading of the battery cells, etc.

[0026] Specifically, the four-station winding mechanism 100 is rotatably connected to the frame of the battery winding device through the rotating seat 1, and four station holes 11 are provided on the rotating seat 1. In the cross section of the rotating seat 1, the centers of the four station holes 11 are on the same circumference, and the center of the circumference is on the rotation axis of the rotating seat 1. Each station hole 11 passes through the rotating seat 1 along the extension direction of the rotation axis. By providing four station holes 11 on the rotating seat 1, the four-station winding mechanism 100 can have four processing stations.

[0027] A winding needle 2 is embedded in a work station hole 11, and each winding needle 2 can rotate along its own axis in the work station hole 11, and the rotations of the four winding needles 2 are independent of each other. The winding needle 2 includes a cylinder 21, a first needle body 22 and a second needle body 23. The cylinder 21 is rotatably installed in the work station hole 11 around the axis of the winding needle 2, that is, the cylinder 21 is rotatably installed in the work station hole 11 around its own axis, and a fifth gear 211 is also mounted on the outer peripheral wall of the cylinder 21. In order to reduce the rotational friction between the cylinder 21 and the work station hole 11 and ensure the rotational accuracy of the winding, a rotating bearing can be set between the cylinder 21 and the work station hole 11. The first needle body 22 is slidably installed in the cylinder body 21 along the axis of the cylinder body 21, and a first plug pin 221 is provided at the first end of the first needle body 22 extending toward the outside of the cylinder body 21. The second needle body 23 is slidably installed in the cylinder body 21 along the axis of the cylinder body 21, and a second plug pin 231 is provided at the first end of the second needle body 23 extending toward the outside of the cylinder body 21. The first plug pin 221 and the second plug pin 231 are matched to clamp and wind the positive electrode sheet, the negative electrode sheet and the diaphragm.

[0028] In addition, a first clamp ring 222 is provided at the second end of the first needle body 22, and the first clamp ring 222 makes it more convenient and quick to connect the first needle body with the driving device of the battery winding device, and ensures the reliability of the driving device of the battery winding device driving the first needle body 22 to move. A second clamp ring 232 is provided at the second end of the second needle body 23, and the second clamp ring 232 makes it more convenient and quick to connect the second needle body with the driving device of the battery winding device, and ensures the reliability of the driving device of the battery winding device driving the second needle body 23 to move.

[0029] The connecting frame 31 is mounted on the rotating base 1, and the four ejector mechanisms 32 are all mounted on the connecting frame 32. Each ejector mechanism 32 includes an ejector seat 321 and an ejector 322, wherein the ejector seat 321 is fixedly connected to the connecting frame 31, and the ejector 322 is mounted on the ejector seat 321. The ejector 322 is arranged toward the needle outlet of the winding needle 2, and a groove is arranged at the end of the ejector 322 facing the end of the winding needle 2, and the ejector 322 of one ejector mechanism 32 is coaxially arranged with one winding needle 2, so that when the first needle body 22 and the second needle body 23 extend from the barrel of the winding needle 2, the first needle body 22 and the second needle body 23 can both extend into and be plugged into the groove of the ejector 322. The ejector mechanism 32 is used to support the first pin 221 of the first needle body 22 of the winding needle 2 and the second pin 231 of the second needle body 23 to prevent the first pin 221 and the second pin 231 from being deformed due to excessive pressure, and to ensure the winding accuracy of the battery cell during the winding process of the battery cell and the gluing accuracy of the battery cell during the gluing process of the battery cell.

[0030] The output end of the transmission device 4 is linked with the four winding needles 2 respectively, and controls each winding needle 2 to rotate around the axis of the winding needle 2 in the work station hole 11. The linkage structure between the transmission device 4 and the four winding needles 2 is specifically as follows:

[0031] The transmission device 4 is a transmission shaft structure, the axis of the transmission device 4 is colinear with the axis of the rotating seat 1, and the transmission device 4 includes a first shaft body, a second shaft body, a third shaft body and a fourth shaft body, wherein the first end of the first shaft body is fixedly connected to the first pulley 41, the second end of the first shaft body is fixedly connected to the first gear 42, the first pulley 41 is coaxially arranged with the first shaft body, the first gear 42 is coaxially arranged with the first shaft body, and the first gear 42 is meshed with the fifth gear 211 on the first winding needle 2. The first end of the second shaft body is fixedly connected to the second pulley 43, the second end of the second shaft body is fixedly connected to the second gear 44, the second pulley 43 is coaxially arranged with the second shaft body, the second gear 44 is coaxially arranged with the second shaft body, and the second gear 44 is meshed with the fifth gear 211 on the second winding needle 2, the second shaft body is sleeved on the first shaft body, and the length of the second shaft body is less than the length of the first shaft body. The first end of the third shaft is fixedly connected to a third pulley 45, the second end of the third shaft is fixedly connected to a third gear 46, the third pulley 45 is coaxially arranged with the third shaft, the third gear 46 is coaxially arranged with the third shaft, the third gear 46 is meshed with the fifth gear 211 on the third winding needle 2, the third shaft is sleeved on the second shaft, and the length of the third shaft is less than the length of the second shaft. The first end of the fourth shaft is fixedly connected to a fourth pulley 47, the second end of the fourth shaft is fixedly connected to a fourth gear 48, the fourth pulley 47 is coaxially arranged with the fourth shaft, the fourth gear 48 is coaxially arranged with the fourth shaft, the fourth gear 48 is meshed with the fifth gear 211 on the fourth winding needle 2, the fourth shaft is sleeved on the third shaft, and the length of the fourth shaft is less than the length of the third shaft. It should be noted that in order to ensure that the transmission device 4 can control each winding needle 2 to rotate separately, the position of the fifth gear 211 on each winding needle 2 relative to the cylinder 21 is different, that is, the fifth gear 211 can be adjusted accordingly according to the position of a gear meshing with the transmission device 4.

[0032] Preferably, the four-station winding mechanism 100 further includes a driving device (not shown), the driving device includes a first motor, a second motor, a third motor and a fourth motor, wherein the motor shaft of the first motor is provided with a fifth pulley, and the fifth pulley is connected to the first pulley 41 through a first transmission belt. The motor shaft of the second motor is provided with a sixth pulley, and the sixth pulley is connected to the second pulley 43 through a second transmission belt. The motor shaft of the third motor is provided with a seventh pulley, and the seventh pulley is connected to the third pulley 45 through a third transmission belt. The motor shaft of the fourth motor is provided with an eighth pulley, and the eighth pulley is connected to the fourth pulley 47 through a fourth transmission belt.

[0033] In order to ensure the winding accuracy of the winding needle 2 and improve the driving accuracy of the driving device to the transmission device 4, the first pulley 41, the second pulley 43, the third pulley 45, the fourth pulley 47, the fifth pulley, the sixth pulley, the seventh pulley and the eighth pulley are all synchronous pulleys. In addition, the first motor, the second motor, the third motor and the fourth motor are all stepper motors, or the first motor, the second motor, the third motor and the fourth motor are all servo motors, because using stepper motors or servo motors as the driving source of the driving device can effectively improve the winding accuracy of the winding needle 2.

[0034] It can be seen that the present invention has four processing stations through the structural design of the four-station winding mechanism 100, wherein the first station is used for removing the first needle body 22 of the winding needle 2, penetrating the diaphragm, winding, and cutting the diaphragm in the same way as the conventional three-station winding mechanism; the second station is used for performing the gluing operation of the battery cell in the same way as the conventional three-station winding mechanism; and the third station is only used for removing the first needle body 22 and the second needle body 23 of the winding needle 2 to realize the unloading of the battery cell; the fourth station is used for removing the second needle body 23 of the winding needle 2, The performance of the four-station winding mechanism 100 is better than that of the traditional three-station winding mechanism, because by setting the fourth station, the third station and the fourth station of the four-station winding mechanism 100 can decompose the action of the third station of the traditional three-station winding mechanism, thereby eliminating the waiting time after the first station and the second station complete the work, so that the four-station winding mechanism 100 can be used for the faster battery cell winding speed at the first station and the faster glue sticking speed at the second station, thereby maximizing the working efficiency of the four-station winding mechanism 100. It should be noted that, since the four-station winding mechanism 100 of the present invention has four processing stations, the number of actuators used by the battery cell winding device compatible with the four-station winding mechanism 100 to drive the first needle body 22 and the second needle body 23 of the winding needle 2 to move should also be increased to four. Of course, the newly added actuator can use the existing actuator, and some types of actuator structures need to be adjusted accordingly according to the action time of the winding needle 2. For example, if the existing battery winding equipment uses a cylinder to drive the first needle body 22 and the second needle body 23 of the winding needle 2, then the newly added actuator can also use a cylinder, and it is only necessary to adjust the action time of the original actuator and the newly added actuator according to the action time of the first needle body 22 and the second needle body 23 of each winding needle 2. If the existing battery winding equipment uses a cam mechanism to drive the first needle body 22 and the second needle body 23 of the winding needle 2, then the newly added actuator can also use a cam mechanism, and it is only necessary to make routine modifications to the contour lines of part or all of the cams of the original actuator and the contour lines of the cams of the newly added actuator according to the action time of the first needle body 22 and the second needle body 23 of each winding needle 2.

[0035] In summary, it can be seen that the four-station winding mechanism provided by the present invention has the advantages of good stability and high production efficiency.

[0036] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A four-station winding mechanism, characterized in that: include: A rotating seat, wherein four workstation holes are arranged on the rotating seat, and in a cross section of the rotating seat, the centers of the four workstation holes are on the same circumference, and the center of the circumference is on the rotation axis of the rotating seat, and each of the workstation holes penetrates the rotating seat along the extension direction of the rotation axis; Four winding needles, one winding needle is embedded in one of the workstation holes, each winding needle can rotate around its own axis, the winding needle comprises a cylinder, a first needle body and a second needle body, the cylinder is rotatably installed in the workstation hole around the axis, the first needle body is slidably installed in the cylinder along the axis, a first end of the first needle body is provided with a first insertion needle facing the outside of the cylinder, the second needle body is slidably installed in the cylinder along the axis, and a second insertion needle is provided at the first end of the second needle body facing the outside of the cylinder; A transmission device, the output end of which is respectively linked with the four winding needles and controls each winding needle to rotate around its own axis; The four-station winding mechanism has four processing stations. The first station is used for removing the first needle body of the winding needle, piercing the diaphragm, winding, and cutting the diaphragm. The second station is used for gluing the battery cell. The third station is only used for extracting the first needle body and the second needle body of the winding needle to realize the unloading of the battery cell. The fourth station is used for removing the second needle body of the winding needle.

2. The four-station winding mechanism according to claim 1, characterized in that: The four-station winding mechanism also includes: A connecting frame, the connecting frame is mounted on the rotating seat; Four ejector mechanisms, each of which includes an ejector seat and an ejector pin, the ejector seat is fixedly connected to the connecting frame, the ejector pin is mounted on the ejector seat, the ejector pin is arranged toward the needle outlet of the winding needle, and the ejector pin of one ejector seat is coaxially arranged with one winding needle.

3. The four-station winding mechanism according to claim 2, characterized in that: The transmission device comprises: A first shaft, a first end of the first shaft is fixedly connected to a first pulley, a second end of the first shaft is fixedly connected to a first gear, the first pulley is coaxially arranged with the first shaft, and the first gear is coaxially arranged with the first shaft; A second shaft, a first end of the second shaft is fixedly connected to a second pulley, a second end of the second shaft is fixedly connected to a second gear, the second pulley is coaxially arranged with the second shaft, the second gear is coaxially arranged with the second shaft, the second shaft is sleeved on the first shaft, and the length of the second shaft is less than the length of the first shaft; A third shaft, wherein a first end of the third shaft is fixedly connected to a third pulley, a second end of the third shaft is fixedly connected to a third gear, the third pulley is coaxially arranged with the third shaft, the third gear is coaxially arranged with the third shaft, the third shaft is sleeved on the second shaft, and the length of the third shaft is less than the length of the second shaft; A fourth shaft, a first end of the fourth shaft is fixedly connected to a fourth pulley, a second end of the fourth shaft is fixedly connected to a fourth gear, the fourth pulley is coaxially arranged with the fourth shaft, the fourth gear is coaxially arranged with the fourth shaft, the fourth shaft is sleeved on the third shaft, and the length of the fourth shaft is less than the length of the third shaft; A fifth gear is fixedly mounted on the winding needle, the first gear is meshed with the fifth gear on the first winding needle, the second gear is meshed with the fifth gear on the second winding needle, the third gear is meshed with the fifth gear on the third winding needle, and the fourth gear is meshed with the fifth gear on the fourth winding needle.

4. The four-station winding mechanism according to claim 3 is characterized in that: The four-station winding mechanism also includes a driving device, which includes: A first motor, wherein a motor shaft of the first motor is provided with a fifth pulley, and the fifth pulley is connected to the first pulley through a first transmission belt; a second motor, wherein a motor shaft of the second motor is provided with a sixth pulley, and the sixth pulley is connected to the second pulley via a second transmission belt; a third motor, wherein a motor shaft of the third motor is provided with a seventh pulley, and the seventh pulley is connected to the third pulley via a third transmission belt; A fourth motor, wherein a motor shaft of the fourth motor is provided with an eighth pulley, and the eighth pulley is connected to the fourth pulley via a fourth transmission belt.

5. The four-station winding mechanism according to claim 4, characterized in that: The first pulley, the second pulley, the third pulley, the fourth pulley, the fifth pulley, the sixth pulley, the seventh pulley, and the eighth pulley are all synchronous pulleys; The first transmission belt, the second transmission belt, the third transmission belt, and the fourth transmission belt are all synchronous belts.

6. The four-station winding mechanism according to claim 5, characterized in that: The first motor, the second motor, the third motor and the fourth motor are all stepping motors; or The first motor, the second motor, the third motor, and the fourth motor are all servo motors.

7. The four-station winding mechanism according to any one of claims 1 to 6, characterized in that: A first clamp ring is disposed at the second end of the first needle body, and a second clamp ring is disposed at the second end of the second needle body.

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