Deviation correcting device of lithium battery diaphragm winding machine

Abstract

The utility model relates to a deviation rectifying device of a lithium battery diaphragm winding machine, and belongs to the technical field of lithium battery diaphragm manufacturing equipment. The deviation rectifying device comprises a rack, a controller and an adjusting part arranged on the rack, a driving assembly is arranged on the rack and drives the adjusting part to do reciprocating motion in the axial direction of the rack, the adjusting part comprises a shaft sleeve and a fixing piece arranged on the shaft sleeve in a penetrating mode, and the fixing piece is arranged on the shaft sleeve. The shaft sleeve is embedded in a roller of the winding machine, the fixing piece is connected with the roller, and the controller is connected with the driving assembly. According to the scheme provided by the utility model, the rollers can be automatically connected, transverse deviation in the winding process can be corrected, and the winding device has the characteristics of simple structure and convenience in winding.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragm manufacturing equipment, in particular to a deviation correcting device for a lithium battery diaphragm winding machine. Background Art

[0002] There are two main processes for preparing lithium-ion battery separators: a dry process (lamellar separation method) and a wet process (thermally induced phase separation method). In the dry process, high molecular weight polymers, additives and other raw materials are mixed to form a uniform melt, and a lamellar structure is formed under tensile stress during extrusion. The lamellar structure is heat-treated to obtain a hard and elastic polymer film, which is then stretched at a certain temperature to form slit-shaped micropores. A microporous membrane is obtained after heat setting. During the stretching and heat setting process, the microporous membrane is transmitted through the rollers on the production line, and then wound and unwound by the traction unit. Due to slight differences between the rollers and uneven tension between the separators, the separator will be laterally offset. If the separator is not adjusted in time after the offset, the quality of the edges on both sides of the separator will deteriorate. Utility Model Content

[0003] In order to overcome the problems existing in the related technology, the utility model provides a deviation correction device for a lithium battery diaphragm winding machine. When the diaphragm is shifted in position, the roller can be adjusted to a suitable position through a driving component to ensure the stability of the diaphragm during the winding and transmission process.

[0004] The utility model provides a deviation correction device for a lithium battery diaphragm winding machine, comprising a frame, a controller and an adjustment part arranged on the frame, the frame is provided with a driving assembly, the driving assembly drives the adjustment part to reciprocate along the axial direction of the frame, the adjustment part comprises a shaft sleeve and a fixing part penetrated on the shaft sleeve, the shaft sleeve is embedded in the roller of the winding machine, the fixing part is connected to the roller, and the controller is connected to the driving assembly.

[0005] In some embodiments, a slide rail is provided on the frame, and the adjustment part is sleeved on the slide rail.

[0006] In some embodiments, the adjustment part also includes a winding motor, a transmission shaft and a support part, the winding motor is fixed on the support part, the output end of the winding motor is connected to the transmission shaft, the transmission shaft is connected to the shaft sleeve, and the support part is sleeved on the slide rail.

[0007] In some embodiments, the sleeve includes an end cover, an outer sleeve and an inner sleeve, the end cover is connected to the end of the outer sleeve, the outer sleeve is sleeved with the inner sleeve, and the outer sleeve and the inner sleeve are provided with through holes for the fixing member to pass through.

[0008] In some embodiments, a receiving groove is formed on the outer circumference of the transmission shaft; the fixing member includes a sleeve and a plate body, the plate body is disposed on the receiving groove, and the sleeve is connected to the plate body by bolts.

[0009] In some embodiments, the driving assembly includes a push rod motor, a push rod of the push rod motor is connected to the frame, and the push rod motor is connected to the support portion.

[0010] In some embodiments, the driving assembly further includes a stepping motor and a ball screw, a slider of the ball screw is connected to the supporting portion, and a rotating shaft of the ball screw is connected to the stepping motor.

[0011] In some embodiments, the support portion includes a fixing seat and a bearing, the fixing seat is sleeved on the slide rail, the fixing seat is provided with a mounting hole for placing the bearing, and the bearing is mounted with the transmission shaft.

[0012] In some embodiments, the controller is connected to a sensing device, the detection ends of the sensing device are opposite to the two side edges of the diaphragm, and the sensing device is used to monitor the displacement of the diaphragm; the controller includes an automatic mode and a manual mode.

[0013] In some embodiments, the sensing device includes a sensor and a regulator, both of which are arranged on the winding machine, the sensor is used to detect the offset of the edges on both sides of the diaphragm, and the regulator is used to calculate the current offset, and the sensor and the regulator are both connected to the controller.

[0014] The technical solution provided by the utility model may have the following beneficial effects:

[0015] The utility model provides a deviation correction device for a lithium battery diaphragm winding machine. During workshop production, the controller first controls the driving assembly to drive the adjustment part to move in the opposite direction along the axial direction of the frame, so that the worker can place the roller on the installation position of the winding machine. Then, the driving assembly drives the adjustment part to move in the positive direction along the axial direction of the frame, so that the sleeve can be embedded in the roller, and the fixing part connects the roller, thereby playing the role of fixing the roller. When the diaphragm is laterally offset during the winding process, the controller can control the driving assembly to drive the adjustment part to move in the axial direction of the frame, so as to adjust the roller to a suitable position, thereby ensuring the stability of the diaphragm during the winding and transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0017] Figure 1 It is a structural schematic diagram of a winding machine shown in an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a deviation correction device shown in an embodiment of the utility model;

[0019] Figure 3 It is another structural schematic diagram of the deviation correction device shown in the embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram of a support portion shown in an embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Frame;

[0023] 2. Adjustment part; 21. Bushing; 211. End cover; 212. Outer bushing; 213. Inner bushing; 22. Fixing member; 221. Sleeve; 222. Plate; 23. Winding motor; 24. Transmission shaft; 241. Accommodation groove; 25. Support part; 251. Fixing seat; 252. Bearing;

[0024] 3. Driving assembly; 31. Push rod motor;

[0025] 4. Slide rail; 5. Controller; 6. Sensing device;

[0026] 10. Winding machine; 100. Roller. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] During the stretching and heat setting process, the microporous membrane is transmitted through the rollers on the production line and then wound and unwound by the traction unit. Due to slight differences between the rollers and uneven tension between the membranes, the membrane may shift laterally. If the membrane is not adjusted in time after shifting, the quality of the edges on both sides of the membrane will deteriorate.

[0031] In view of the above technical problems, the utility model provides a deviation correction device for a lithium battery diaphragm winding machine 10. When the diaphragm is shifted, the roller 100 can be adjusted to a suitable position through the driving component 3 to ensure the stability of the diaphragm during the winding and transmission process.

[0032] Figure 1 It is a schematic structural diagram of a winding machine 10 shown in an embodiment of the utility model;

[0033] Figure 2 It is a structural schematic diagram of a deviation correction device shown in an embodiment of the utility model;

[0034] Figure 3 It is another structural schematic diagram of the deviation correction device shown in an embodiment of the utility model.

[0035] like Figures 1 to 3 As shown, the correction device provided by the utility model includes a frame 1, a controller 5 and an adjustment part 2 arranged on the frame 1, the frame 1 is provided with a driving component 3, the driving component 3 drives the adjustment part 2 to reciprocate along the axial direction of the frame 1, the adjustment part 2 includes a sleeve 21 and a fixing part 22 passed through the sleeve 21, the sleeve 21 is embedded in the roller 100 of the winding machine 10, the fixing part 22 is connected to the roller 100, and the controller 5 is connected to the driving component 3.

[0036] During production in the workshop, the controller 5 first controls the drive assembly 3 to drive the adjustment part 2 to move in the reverse direction along the axial direction of the frame 1, so that the worker can place the roller 100 on the installation position of the winding machine 10. Then, the drive assembly 3 drives the adjustment part 2 to move in the forward direction along the axial direction of the frame 1, so that the sleeve 21 can be embedded in the roller 100, and the fixing part 22 connects the roller 100, thereby fixing the roller 100. When the diaphragm is laterally offset during the winding process, the controller 5 can control the drive assembly 3 to drive the adjustment part 2 to move in the axial direction of the frame 1, so as to adjust the roller 100 to a suitable position, thereby ensuring the stability of the diaphragm during the winding and transmission process.

[0037] In this embodiment, a slide rail 4 is provided on the frame 1 of the deviation correction device provided by the utility model, and the adjustment part 2 is sleeved on the slide rail 4 .

[0038] In this embodiment, the adjustment part 2 of the deviation correction device provided by the utility model further includes a winding motor 23, a transmission shaft 24 and a support part 25, wherein the winding motor 23 is fixedly mounted on the support part 25, the output end of the winding motor 23 is connected to the transmission shaft 24, the transmission shaft 24 is connected to the shaft sleeve 21, and the support part 25 is sleeved on the slide rail 4. Under this setting, the adjustment part 2 can be used to fix the roller 100, and when the roller 100 is fixed, the diaphragm can be wound by the winding motor 23. During the winding process, the movement of the shaft sleeve 21 can be realized by the support part 25, thereby adjusting the relative position of the roller 100, and then adjusting the winding position of the diaphragm.

[0039] In this embodiment, in order to facilitate the sleeve 21 to be smoothly inserted into the roller 100 when it cooperates with the roller 100, the sleeve 21 of the correction device provided by the utility model includes an end cover 211, an outer sleeve 212 and an inner sleeve 213, the end cover 211 is connected to the end of the outer sleeve 212, the outer sleeve 212 is sleeved with the inner sleeve 213, and the outer sleeve 212 and the inner sleeve 213 are provided with through holes for the fixing member 22 to pass through.

[0040] In this embodiment, a receiving groove 241 is provided on the outer periphery of the transmission shaft 24 of the correction device provided by the utility model; the fixing member 22 includes a sleeve 221 and a plate body 222, the plate body 222 is arranged on the receiving groove 241, and the sleeve 221 and the plate body 222 are connected by bolts.

[0041] In this embodiment, the driving assembly 3 of the deviation correction device provided by the utility model includes a push rod motor 31, a push rod of the push rod motor 31 is connected to the frame 1, and the push rod motor 31 is connected to the support part 25. For details, please refer to Figure 3The push rod of the push rod motor 31 is connected to the frame 1. When the push rod motor 31 is working, since the end of the push rod is fixed on the frame 1, the main body of the push rod motor 31 moves under the thrust, thereby driving the support part 25 to move.

[0042] In this embodiment, the driving component 3 of the correction device provided by the utility model also includes a stepper motor (not shown) and a ball screw (not shown), the slider of the ball screw is connected to the support part 25, and the rotating shaft of the ball screw is connected to the stepper motor.

[0043] Specifically, a stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The angular displacement or linear displacement output is proportional to the number of pulses input, and the rotation speed is proportional to the pulse frequency. Therefore, the stepper motor can accurately control the rotation amplitude of the rotating shaft, and then accurately position the amplitude of movement of the support part 25. In the process of driving the support part 25 to move along the axis of the ball screw, the stepper motor can achieve a short-distance position of the support part 25 according to the thread density between the ball screw and the slider.

[0044] Exemplarily, the stepper motor can rotate with a rotation range of 120°, and the displacement of the support portion 25 is 1 / 3πR, where R is the diameter of the lead screw.

[0045] In this embodiment, in order to improve the connection firmness between the winding motor 23, the transmission shaft 24 and the sleeve 21, refer to Figure 4 , and combined with Figure 2 and Figure 3 The support part 25 of the deviation correction device provided by the utility model includes a fixing seat 251 and a bearing 252. The fixing seat 251 is sleeved with the slide rail 4. The fixing seat 251 is provided with a mounting hole for placing the bearing 252. The bearing 252 is mounted with the transmission shaft 24. Under this setting, it can be ensured that the support part 25 can provide sufficient support force for the transmission shaft 24 on the one hand, and can reduce the friction between the transmission shaft 24 and the support part 25 on the other hand.

[0046] In this embodiment, the controller 5 of the correction device provided by the utility model is connected to the sensing device 6, the detection end of the sensing device 6 is opposite to the two side edges of the diaphragm, and the sensing device 6 is used to monitor the displacement of the diaphragm; the controller 5 includes an automatic mode and a manual mode.

[0047] When the sensing device 6 senses that the diaphragm has a positional displacement, the information of the diaphragm positional displacement is transmitted to the control device. The control device controls the driving component 3 to move the adjustment part 2 to a suitable position and adjust the position of the diaphragm. By transmitting the information of the diaphragm displacement to the control device through the sensing device 6, not only can the information such as the displacement direction and displacement amount be provided more accurately, the accuracy of the diaphragm position adjustment can be ensured, and errors caused by manual operation can be eliminated.

[0048] More specifically, the automatic mode adopted by the utility model realizes automated deviation correction by the interaction among the sensing device 6, the controller 5 and the drive assembly 3. In the manual mode, the sensing device 6 detects the offset and obtains the displacement to be corrected by calculation, and sends the displacement to the controller 5. The operator manually controls the controller 5 to drive the drive assembly 3. When the travel of the drive sleeve 21 driven by the drive assembly 3 is consistent with the calculated displacement, the controller 5 is disconnected from the drive assembly 3, thereby realizing the deviation correction operation in the manual mode.

[0049] In this embodiment, the sensing device 6 of the correction device provided by the utility model includes a sensor and a regulator, and the sensor and the regulator are both arranged on the winding machine 10. The sensor is used to detect the offset of the edges on both sides of the diaphragm, and the regulator is used to calculate the current offset. The sensor and the regulator are both connected to the controller 5.

[0050] When the diaphragm is laterally offset during the winding process, the staff needs to manually adjust the control device to drive the winding roller 100 to move to a suitable position to ensure the stability of the diaphragm during the transmission process. However, the work intensity of this correction method is relatively high, and it is necessary to keep an eye on the diaphragm transmission track at all times, so that the diaphragm cannot be adjusted in time when it is offset. In this case, the online correction operation is realized through the sensor and the regulator, eliminating the need for the workers to keep an eye on the diaphragm transmission track, and effectively improving the production efficiency of the diaphragm for stretching or heat setting. The regulator can perform the correction operation according to the preset program, or through the controller 5, the operator presses the corresponding controller 5 button, and the controller 5 controls the drive component 3 to correct the deviation. When the stroke executed by the controller 5 reaches the preset stroke fed back to the controller 5 by the regulator, the controller 5 automatically disconnects the connection between the button, and the operator does not need to observe the correction amount of the diaphragm with the naked eye, which has the characteristics of simplicity, convenience and speed.

[0051] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A deviation correction device for a lithium battery diaphragm winding machine, characterized in that: It includes a frame, a controller and an adjustment part arranged on the frame, the frame is provided with a driving component, the driving component drives the adjustment part to reciprocate along the axial direction of the frame, the adjustment part includes a sleeve and a fixing part inserted on the sleeve, the sleeve is embedded in the roller of the winding machine, the fixing part is connected to the roller, and the controller is connected to the driving component.

2. A deviation-correcting device for a lithium battery diaphragm winding machine according to claim 1, characterized in that: The frame is provided with a slide rail, and the adjustment part is sleeved on the slide rail.

3. A deviation-correcting device for a lithium battery diaphragm winding machine according to claim 2, characterized in that: The adjustment part also includes a winding motor, a transmission shaft and a support part. The winding motor is fixed on the support part. The output end of the winding motor is connected to the transmission shaft. The transmission shaft is connected to the shaft sleeve. The support part is sleeved on the slide rail.

4. A deviation-correcting device for a lithium battery separator winding machine according to claim 3, characterized in that: The shaft sleeve comprises an end cover, an outer shaft sleeve and an inner shaft sleeve, the end cover is connected to the end of the outer shaft sleeve, the outer shaft sleeve is sleeved with the inner shaft sleeve, and through holes for the fixing member to pass through are provided on the outer shaft sleeve and the inner shaft sleeve.

5. A deviation-correcting device for a lithium battery separator winding machine according to claim 4, characterized in that: The outer circumference of the transmission shaft is provided with a receiving groove; the fixing member comprises a sleeve and a plate body, the plate body is arranged on the receiving groove, and the sleeve is connected to the plate body by bolts.

6. A deviation-correcting device for a lithium battery separator winding machine according to claim 5, characterized in that: The driving assembly comprises a push rod motor, a push rod of the push rod motor is connected to the frame, and the push rod motor is connected to the supporting part.

7. A deviation-correcting device for a lithium battery separator winding machine according to claim 5, characterized in that: The driving assembly also includes a stepping motor and a ball screw, the slider of the ball screw is connected to the supporting part, and the rotating shaft of the ball screw is connected to the stepping motor.

8. The deviation-correcting device for a lithium battery separator winding machine according to claim 5, characterized in that: The support portion includes a fixing seat and a bearing. The fixing seat is sleeved with the slide rail. A mounting hole for placing the bearing is provided on the fixing seat. The transmission shaft is mounted on the bearing.

9. A deviation-correcting device for a lithium battery separator winding machine according to claim 1, characterized in that: The controller is connected to a sensing device, the detection ends of the sensing device are opposite to the two side edges of the diaphragm, and the sensing device is used to monitor the displacement of the diaphragm; the controller includes an automatic mode and a manual mode.

10. A deviation-correcting device for a lithium battery separator winding machine according to claim 9, characterized in that: The sensing device includes a sensor and a regulator, both of which are arranged on the winding machine. The sensor is used to detect the offset of the edges on both sides of the diaphragm, and the regulator is used to calculate the current offset. Both the sensor and the regulator are connected to the controller.

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