CN111170056A

CN111170056A - Winding tension reducing device and winding equipment

Info

Publication number: CN111170056A
Application number: CN202010127190.9A
Authority: CN
Inventors: 黄振奎; 冯钦凌; 周俊杰; 蔡海生
Original assignee: Guangdong Lyric Robot Automation Co Ltd
Current assignee: Guangdong Lyric Robot Automation Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-05-19

Abstract

The utility model relates to a lithium ion battery makes technical field, particularly, relates to a rolling tension reducing mechanism and coiling equipment, and the coiling equipment is including unwinding device, tension mechanism and the coiling mechanism that sets gradually, and rolling tension reducing mechanism sets up between tension mechanism and coiling mechanism, and rolling tension reducing mechanism includes drive roll, compression roller and torque drive mechanism, and torque drive mechanism is used for driving the drive roll and rotates, and the compression roller is used for cooperating the centre gripping coiled material with the drive roll. Utilize rolling tension reducing mechanism to make the coiled material have by the trend that the drive roll drove towards the tape transport direction under the state by the centre gripping to make the coiled material can keep great tension transmission before passing through the drive roll, and obtain the relative effort that is used for offsetting tension after the drive roll, thereby can be reduced to rolling behind less tension, the purpose of the inside regularity and the product deformation degree of taking into account the battery product is realized.

Description

Winding tension reducing device and winding equipment

Technical Field

The application relates to the technical field of lithium ion battery manufacturing, in particular to a winding tension reducing device and winding equipment.

Background

In the pole piece winding process stage of the square winding battery, the coiled material needs to have larger tension to ensure the inside uniformity of the product, but in the standing and releasing step after winding, the tension is too large to cause serious deformation of the wound product, so that the problem of how to reduce the winding tension is needed to be solved in the lithium battery industry under the condition of winding with larger tension.

Disclosure of Invention

The application aims at providing a rolling tension reducing device and winding equipment to solve the problem of how to reduce the rolling tension of pole pieces.

The embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a rolling tension reducing device, which includes a drive roll, a compression roller and a torque driving mechanism, the torque driving mechanism is used for driving the drive roll rotates, the compression roller is used for cooperating with the drive roll to clamp the coiled material.

The application provides a rolling tension reducing mechanism, can be used to set up the position department near the coiling mechanism, utilize drive roll and compression roller cooperation centre gripping coiled material, moment of torsion actuating mechanism drive roll rotates along the tape running direction of coiled material, and provide a moment of torsion along its self rotation side to the drive roll, coiled material and drive roll interact, make the drive roll have the trend that drags the coiled material towards the direction of coiling mechanism, provide a power that is in reverse in coiled material tension to the coiled material through the drive roll, thereby make the coiled material tension reduce after the drive roll, effectively reduce rolling tension, avoid the coiled material to warp because tension is too big after the rolling.

Optionally, in an embodiment of the present application, the torque driving mechanism includes a motor and a magnetic particle clutch, and the motor is connected to the driving roller through the magnetic particle clutch.

The motor is connected with the driving roller through the magnetic powder clutch, the magnetic powder clutch can be used for adjusting the torque transmitted to the driving roller, the torque on the driving roller in the rotation direction can be changed, and therefore the force opposite to tension and provided for the coiled material by the driving roller can be adjusted, and the rolling tension can be adjusted.

Optionally, in an embodiment of the present application, an output end of the magnetic powder clutch is connected to the driving roller through a coupling.

Optionally, in an embodiment of the present application, an output end of the magnetic powder clutch is provided with a first synchronizing wheel, one end of the driving roller is provided with a second synchronizing wheel, and the first synchronizing wheel is connected with the second synchronizing wheel through a synchronous belt transmission.

Optionally, in an embodiment of the present application, the winding tension reducing device further includes a first mounting bracket, a second mounting bracket, and a linear driving mechanism, the driving roller and the linear driving mechanism are installed in the first mounting bracket, the pressing roller is installed in the second mounting bracket, and the linear driving mechanism is used for driving the second mounting bracket to move so that the pressing roller is close to the driving roller.

Install drive roll and compression roller respectively on two different mounting brackets through the setting, utilize sharp actuating mechanism drive second mounting bracket to remove for the distance between compression roller and the drive roll is adjustable, thereby adjusts the clamping-force of compression roller and drive roll to the coiled material as required, prevents that the surface of the relative drive roll of coiled material from skidding.

Optionally, in an embodiment of the present application, a sliding groove is formed in the first mounting frame, two bearing seats are formed in the second mounting frame, two ends of the compression roller are respectively mounted on the two bearing seats, and one end of the compression roller penetrates through the corresponding bearing seat to be matched with the sliding groove, and the compression roller can move along the sliding groove and can rotate around its own axis in the sliding groove.

Through rotationally wearing to establish the compression roller in the spout, play the effect of direction when sharp actuating mechanism drive second mounting bracket removes, make the compression roller be close to or keep away from the drive roll along the straight line, the interval of the two each position is unanimous, and the clamping-force that the coiled material received when passing through the drive roll is unanimous, ensures that the tension that the coiled material received is unanimous, and each position rolling tightness is unanimous on width direction.

Optionally, in an embodiment of the present application, the second mounting bracket is connected to the first mounting bracket through a guide mechanism.

Through setting up guiding mechanism, play the effect of direction when sharp actuating mechanism drive second mounting bracket removes, improve the mobility stability.

Optionally, in an embodiment of the present application, the guide mechanism includes a guide rail, the guide rail is disposed on the first mounting bracket, and the second mounting bracket is movably mounted to the guide rail.

The guide rail is arranged to connect the first mounting frame and the second mounting frame, so that the first mounting frame and the second mounting frame are stable in movement.

Optionally, in an embodiment of the present application, the guiding mechanism includes a sleeve and a piston rod, the sleeve is mounted to the first mounting frame, the piston rod is mounted to the second mounting frame, and the sleeve is engaged with the piston rod.

The first mounting frame and the second mounting frame are connected through the sleeve and the piston rod, so that the first mounting frame and the second mounting frame are stable in movement.

In a second aspect, an embodiment of the present application provides a winding apparatus, which includes an unwinding device, a tension mechanism and a winding device that are sequentially disposed, wherein the tension mechanism and the winding device are provided with the winding tension reducing device therebetween.

The embodiment of the application provides a winding device, set up tension mechanism and rolling tension reducing mechanism between unwinding device and the coiling mechanism of winding device, utilize tension mechanism to ensure that the pole piece has sufficient tension before coiling, utilize rolling tension reducing mechanism to reduce tension in an appropriate amount before the rolling, this winding device can provide the required great tension before coiling, reduce tension when can rolling again, compromise inside regularity and the product degree of deformation of coiling battery product.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural arrangement diagram of a winding apparatus provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a winding tension reducing device according to an embodiment of the present disclosure;

fig. 3 is another schematic structural diagram of a winding tension reducing device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a winding tension reducing device according to an embodiment of the present application.

Icon: 100-an unwinding device; 200-a transition roll; 300-a tension mechanism; 400-a winding device; 500-rolling tension reducing device; 500 a-a take-up tension reducing device; 500 b-a take-up tension reducing device; 500 c-a take-up tension reducing device; 510-a first mounting frame; 511-guide rail; 512-a sleeve; 520-a second mounting frame; 521-a piston rod; 530-torque drive mechanism; 531-motor; 532-magnetic particle clutch; 533-shaft coupling; 541-a first synchronizing wheel; 542-a second synchronizing wheel; 543-a synchronous belt; 550-linear drive mechanism; 560-drive roll; 570-press roll.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

At present, the lithium ion batteries are prepared in a plurality of varieties, wherein the square winding lithium ion battery is one of the preparation modes mainly selected by the lithium battery factory at present due to the efficiency advantage during winding preparation.

In the pole piece winding process stage of the square winding battery, the coiled material (namely, the pole piece strip material) needs to have larger tension to ensure the uniformity of the interior of a wound product, but in the standing and releasing link after the winding is finished, if the tension is too large, the wound product is seriously deformed. The poor winding uniformity is easily caused by too small tension during winding, and the winding product is seriously deformed due to too large tension after winding, so that the low-tension winding of the square winding battery is a difficult problem which needs to be solved urgently in the lithium battery industry.

In the prior art, tension control of winding of the rectangular battery is mainly to reduce tension and control tension fluctuation, and the prior art only adopts a relatively balanced value between large tension before winding and small tension after winding.

The embodiment of the application provides a rolling tension reducing device 500 and winding equipment for make the coiled material have great tension before the coiling, can reduce tension again when the rolling, compromise the inside regularity and the product deformation degree of battery product.

As shown in fig. 1, the winding apparatus includes an unwinding device 100 and a winding device 400, the coiled material is output from the unwinding device 100 and is transported to the winding device 400 to be wound into a product, a plurality of transition rollers 200 are disposed on a transport path of the coiled material to assist in transportation, a tension mechanism 300 is further disposed on the transport path of the coiled material to enable the coiled material to have a larger tension F, and the winding tension reducing device 500 is disposed at a position close to the winding device 400 to reduce the tension of the coiled material before the winding device 400 winds the coiled material.

The winding tension reducing device 500 comprises a driving roller 560, a compression roller 570 and a torque driving mechanism 530, wherein the torque driving mechanism 530 is used for driving the driving roller 560 to rotate, and the compression roller 570 and the driving roller 560 are matched to clamp the coiled material.

The torque driving mechanism 530 drives the driving roller 560 to rotate in the web traveling direction and provides the driving roller 560 with a torque in its own rotational direction. By using the frictional force between the driving roller 560 and the coiled material and the clamping force of the driving roller 560 and the compression roller 570, the driving roller 560 has a tendency of dragging the coiled material towards the winding device 400, so that a force F opposite to the tension of the coiled material is provided for the coiled material, the tension of the coiled material after passing through the driving roller 560 is effectively reduced to be the actual tension of the coiled material when the coiled material is wound, the coiled material is wound at the smaller tension, and the problem of deformation of the coiled material caused by the overlarge tension is solved.

The torque driving mechanism 530 may be a servo motor 531, an output end of the servo motor 531 is in transmission connection with the drive roll 560, and the servo motor 531 is used to provide a torque source using a torque mode.

In the actual winding process, the winding device 400 has the situations of accelerated winding, uniform winding and decelerated winding, but has no controllable acceleration performance simply because the servo motor 531 is in the torque mode. Therefore, the aforementioned torque drive mechanism 530 is configured to include the motor 531 and the magnetic particle clutch 532, the output shaft of the motor 531 is connected to the drive body shaft of the magnetic particle clutch 532 through the coupling 533, and the driven body shaft of the magnetic particle clutch 532 (i.e., the output shaft of the magnetic particle clutch 532) is drivingly connected to the drive roller 560. The motor 531 is used to provide the rotational speed and the magnetic particle clutch 532 is used to provide the required torque.

By changing the magnitude of the exciting current of the magnetic powder clutch 532, the magnitude of the output torque can be controlled, so that the magnitude of the torque applied to the driving roller 560 in the rotation direction of the driving roller is variable, the force opposite to the tension provided by the driving roller 560 to the coiled material is adjusted, and the magnitude adjustment of the winding tension is realized.

The winding tension reducing device 500 further comprises a first mounting frame 510, a second mounting frame 520 and a linear driving mechanism 550, wherein the linear driving mechanism 550 is mounted on the first mounting frame 510, and the output end of the linear driving mechanism 550 is connected with the second mounting frame 520, so that the linear driving mechanism 550 can move to enable the second mounting frame 520 to be close to or far away from the first mounting frame 510.

Wherein the first mounting bracket 510 is used for mounting the driving roller 560, and the second mounting bracket 520 is used for mounting the pressing roller 570. The first and

second mounting frames

510 and 520 are respectively provided with two bearing seats.

The linear driving mechanism 550 is used for driving the second mounting frame 520, so that the pressing roller 570 on the second mounting frame 520 is close to or far away from the driving roller 560, the distance between the pressing roller 570 and the driving roller 560 is adjustable, the clamping force of the pressing roller 570 and the driving roller 560 on the coiled material is adjusted according to needs, and the coiled material is prevented from slipping on the surface of the driving roller 560.

Alternatively, the wrap angle between the web and the drive roller 560 may also be increased, thereby increasing the frictional force of the web and the drive roller 560, resulting in the prevention of the web from slipping.

The linear driving mechanism 550 may be various, such as a motor 531 and a lead screw assembly, a hydraulic cylinder, an electric cylinder, etc., and in this embodiment, the linear driving mechanism 550 employs an air cylinder. The cylinder is mounted on the first mounting bracket 510, and the output end of the cylinder is connected to the second mounting bracket 520.

In the winding tension reducing device 500a shown in fig. 2, there is provided a mounting manner of the driving roll 560 and the pressing roll 570, as shown in fig. 2, both ends of the driving roll 560 are mounted on two bearing housings on the first mounting frame 510, and one end of the driving roll 560 passes through the corresponding bearing housing to be connected with an output end of the magnetic particle clutch 532. A sliding groove is further formed on the first mounting frame 510.

Both ends of the pressing roller 570 are mounted on two bearing seats on the second mounting bracket 520, one end of the pressing roller 570 passes through the corresponding bearing seat to be fitted with the sliding groove, the pressing roller 570 can move along the sliding groove, and the pressing roller 570 can also rotate around its own axis in the sliding groove.

The first and second mounting

brackets

510 and 520 may be connected by a guide mechanism to ensure smooth movement.

In a take-up tension reducing apparatus 500a shown in fig. 2, a guide mechanism of the first mounting bracket 510 and the second mounting bracket 520 is provided. As shown in fig. 2, the guiding mechanism includes a sleeve 512 and a piston rod 521, the sleeve 512 is mounted on the first mounting bracket 510, the piston rod 521 is mounted on the second mounting bracket 520, and the sleeve 512 is engaged with the piston rod 521. Two guide mechanisms are respectively arranged at two sides of the linear driving mechanism 550 to ensure that two ends of the second mounting frame 520 and the compression roller 570 stably move synchronously, and ensure that the compression roller 570 is parallel to the driving roller 560. When the linear drive mechanism 550 is actuated, both piston rods 521 move in and out along their respective sleeves 512.

In the alternative winding tension reducer 500b shown in fig. 3 and the alternative winding tension reducer 500c shown in fig. 4, alternative guide mechanisms for the first and second mounting

brackets

510 and 520 are provided. As shown in fig. 3 or 4, the guide mechanism includes a guide rail 511, the guide rail 511 is disposed on the first mounting bracket 510, and the second mounting bracket 520 is movably mounted to the guide rail 511.

The torque driving mechanism 530 and the driving roller 560 may be connected through a transmission structure or directly connected.

Fig. 4 shows a case where the torque driving mechanism 530 is directly connected to the drive roller 560, as shown in fig. 4, the motor 531 is connected to the magnetic particle clutch 532 through the coupling 533, and the output end of the magnetic particle clutch 532 is connected to one end of the drive roller 560 through the coupling 533.

The transmission structure may be a synchronous sprocket set, a synchronous belt 543 wheel set, a gear set, etc., and fig. 2 and 3 show the torque driving mechanism 530 and the driving roller 560 are in transmission connection through the synchronous belt 543 wheel set. As shown in fig. 2 and 3, a motor 531 and a magnetic particle clutch 532 are mounted on the first mounting bracket 510, a first synchronizing wheel 541 is provided at an output end of the magnetic particle clutch 532, one end of a driving roller 560 passes through a corresponding bearing housing and a second synchronizing wheel 542 is provided at an end portion; the first synchronizing wheel 541 and the second synchronizing wheel 542 are in transmission connection through a synchronous belt 543.

Assuming that the running speed of the coil is v, the diameter of the driving roll 560 is d, and the rotation speed of the motor 531 is a, the control method of the winding tension reducing device 500 provided in the embodiment of the present application is as follows:

when the winding apparatus is operated, the traveling speed v of the roll is the same as the rotation speed of the drive roll 560, the drive body inside the magnetic powder clutch 532 rotates in synchronization with the output shaft of the motor 531, and the driven body inside the magnetic powder clutch 532 rotates in synchronization with the drive roll 560, so that the drive body and the driven body rotate at a differential speed to provide torque to the drive roll 560.

Therefore, in use, the rotational speed a of the motor 531 should be controlled to be greater than the rotational speed of the drive roll 560, i.e., a > v/π d.

Then, the torque and the rotational speed of the drive roller 560 are adjusted according to the change in the traveling speed by the magnetic particle clutch 532.

According to the winding tension reducing device 500 and the winding equipment provided by the embodiment of the application, the torque driving mechanism 530, the driving roller 560 and the compression roller 570 are arranged, the coiled material has the tendency of being dragged towards the tape running direction by the driving roller 560 in the clamped state, so that the coiled material can keep large tension F transmission before passing through the driving roller 560, and a relative acting force F for offsetting the tension is obtained after passing through the driving roller 560, so that the coiled material can be wound after being reduced to small tension (F-F), and the purposes of considering both the internal uniformity and the product deformation degree of a battery product are achieved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a rolling tension reducing mechanism, its characterized in that includes drive roll, compression roller and moment of torsion actuating mechanism, moment of torsion actuating mechanism is used for the drive roll rotates, the compression roller be used for with drive roll cooperation centre gripping coiled material.

2. The winding tension reducing device according to claim 1, wherein the torque driving mechanism includes a motor and a magnetic particle clutch, and the motor is connected to the drive roller through the magnetic particle clutch.

3. The winding tension reducing device according to claim 2, wherein an output end of the magnetic powder clutch is connected with the drive roller through a coupling.

4. The winding tension reducing device according to claim 2, wherein a first synchronizing wheel is arranged at an output end of the magnetic powder clutch, a second synchronizing wheel is arranged at one end of the driving roller, and the first synchronizing wheel and the second synchronizing wheel are connected through a synchronous belt in a transmission manner.

5. The winding tension reducing device according to claim 1, further comprising a first mounting frame, a second mounting frame, and a linear driving mechanism, wherein the driving roller and the linear driving mechanism are mounted on the first mounting frame, the pressing roller is mounted on the second mounting frame, and the linear driving mechanism is configured to drive the second mounting frame to move so that the pressing roller is close to the driving roller.

6. The winding tension reducing device according to claim 5, wherein a chute is formed in the first mounting frame, two bearing seats are formed in the second mounting frame, two ends of the compression roller are respectively mounted on the two bearing seats, one end of the compression roller penetrates through the corresponding bearing seat to be matched with the chute, and the compression roller can move along the chute and can rotate around the axis of the compression roller in the chute.

7. The take-up tension reducing device of claim 5, wherein the second mounting bracket is connected to the first mounting bracket by a guide mechanism.

8. The take-up tension reducing device of claim 7, wherein the guide mechanism includes a guide rail disposed on the first mounting bracket, the second mounting bracket being movably mounted to the guide rail.

9. The winding tension reducing device of claim 7, wherein the guide mechanism includes a sleeve and a piston rod, the sleeve being mounted to the first mounting bracket and the piston rod being mounted to the second mounting bracket, the sleeve engaging the piston rod.

10. A winding device, comprising an unwinding device, a tension mechanism and a winding device, which are arranged in sequence, wherein the winding tension reducing device of any one of claims 1 to 9 is arranged between the tension mechanism and the winding device.