WO2011063710A1

WO2011063710A1 - Winding device and winding method

Info

Publication number: WO2011063710A1
Application number: PCT/CN2010/078400
Authority: WO
Inventors: 阳如坤; 徐国根
Original assignee: 深圳市吉阳自动化科技有限公司
Priority date: 2009-11-24
Filing date: 2010-11-04
Publication date: 2011-06-03
Also published as: CN101719561A; CN101719561B

Abstract

A winding device and a winding method are disclosed. The device comprises a winding head (2) and a winding needle (1) mounted on the winding head (2) and rotating with the winding head (2) for a belt material (3) to wind. The device further comprises a winding drive mechanism for controlling the belt material (3) or the winding head (2) to perform linear velocity compensation movement and maintain the linear velocity of the belt material (3) in a certain range. The winding drive mechanism comprises a base (4), compensation control elements moveably mounted on the base (4) and a motor (6) for driving the compensation control elements. The belt material (3) or the winding head (2) is linked with the compensation control elements. The device controls the belt material or the winding head to perform the linear velocity compensation movement, makes the linear velocity generated by the winding of the belt material driven by the rotating of the winding needle and the linear velocity generated by the linear velocity compensation movement performed by the winding needle or the belt material complement each other, keeps stable winding tension, and effectively prevents the winding product from being deformed.

Description

Winding device and winding method

Technical field

The present invention relates to a winding device and a winding method.

Background technique

As shown in Fig. 1, in a conventional winding device, a flat-shaped winding needle 1 mounted on a winding head 2 is rotated at a constant speed around its rotating shaft 11, so that the strip 3 from above or one side of the winding needle 1 is wound around On the needle 1, however, due to the different linear speeds of the strip 1 pulling the strip 3 in different motion states, the tension of the strip 3 during the winding process is uneven, and the product formed by winding the strip 3 is easy. Deformation occurred.

For example, in FIG. 1 , when the battery core of the prismatic lithium ion battery is wound, the strip 3 is a pole piece, and the pole piece directly above the winding needle 1 is gradually driven along the core point 12 of the winding needle 1 by the winding needle 1 . The trajectory is wound to form a cell.

The needle 1 for a square lithium ion battery is generally flat, so the linear speed at which the needle 1 moves the pole pieces in different winding states is not uniform. In particular, when the needle 1 is rotated at the same angle in the vertical direction and the horizontal direction, the length of the pole piece being pulled is greatly different, for example, when the needle 1 is rotated from the state A to the horizontal state B, the rotation angle is 20°, from the vertical The rotation angle of the straight state C to the state D is also 20°. By means of the auxiliary circle O1 and the auxiliary circle O2, it can be clearly seen that the length of the pole piece changes greatly when the needle 1 is rotated from the state A to the state B. The length of the pole piece changes little from the state C to the state D. When the needle 1 has a constant rotation speed, the line speed of the pole piece when the needle 1 is in the horizontal position is much larger than that of the vertical position, and the linear velocity of the pole piece changes substantially like the sine of the half waveform. function. It is precisely because of this difference in line speed that the pulling force of the needle 1 driving the pole piece is also different in different states: that is, the winding tension of the pole piece is large when the winding needle 1 is in the horizontal state, and the winding needle 1 is located vertically. In the state, the winding tension of the pole piece is small, so that the degree of tightness of the pole piece wound on the winding needle 1 is uneven, and it is easy to deform the wound product such as the battery core wound by the pole piece, and it is difficult to ensure lithium ion. The battery has a regular shape.

technical problem

The main technical problem to be solved by the present invention is to provide a winding device and a winding method for preventing deformation of a wound product.

Technical solution

In order to solve the above technical problems, the present invention provides a winding device, The utility model comprises a winding head and a winding needle mounted on the winding head and rotating with the winding head for winding the strip, further comprising a linear speed compensation movement for controlling the strip or the winding head, A winding drive mechanism that stabilizes the linear velocity of the strip within a certain range.

The winding drive mechanism includes a base, a compensation control member movably mounted on the base, and a motor for driving the compensation control member, the tape or winding head being interlocked with the compensation control member.

The compensation control member includes a swing lever and a driving mechanism driven by the motor; a middle portion of the swing lever is rotatably coupled to the base, and one end of the swing lever is driven by the driving mechanism, and the other end is The material or the winding head is linked.

The compensation control member further includes a winder mount for mounting the winder, the base and the winder mount forming a longitudinal movement pair;

The driving mechanism includes a first driving mechanism for driving the winding head to perform a longitudinal linear velocity compensating motion, and the swinging bar includes a first swinging lever;

One end of the first rocker is driven by the first drive mechanism and the other end is movably coupled to the winder mount.

The first rocker is movably connected to the winder mount by a slider.

Further, the base further forms a lateral movement pair with the winding head mounting member;

The driving mechanism may further include a second driving mechanism for driving the winding head to perform a lateral linear velocity compensating motion, the swinging bar further comprising a second swinging lever;

One end of the second rocker is driven by the second drive mechanism and the other end is movably coupled to the winder mount.

The first drive mechanism and the second drive mechanism may both be cam mechanisms.

The drive mechanism also includes a compensating follower for causing the first drive mechanism and the second drive mechanism to follow.

In another embodiment, the compensation control member further includes a strip control rod for controlling the strip to perform a lateral linear velocity compensation movement; one end of the strip control rod is hinged to the swing rod, and the other end is A lateral movement pair is formed with the substrate.

The present invention also contemplates a winding method comprising the steps of: winding the drive mechanism to control the strip or winder for linear velocity compensation movement, causing the strip to be wound by a linear velocity that is stable within a certain range Mounted on the winding head, on the winding needle that rotates with the winding head.

Beneficial effect

The invention controls the strip speed or the winding head in the winding device to perform the linear velocity compensating movement by the winding drive mechanism, so that the linear speed of the winding of the reel to drive the strip and the linear acceleration compensation movement of the winding needle or the strip are generated. The line speeds complement each other, and finally the line speed of the strip is stabilized within a certain range, in particular, a constant line speed is formed, the winding tension of the strip is kept stable, and the degree of tightness of the winding on the wrap is balanced. Effectively prevents deformation of the wound product.

The winding drive mechanism of the present invention simultaneously performs the longitudinal linear velocity compensation movement and the transverse linear velocity compensation movement of the winding head, and further improves the compensation adjustment precision of the linear velocity of the strip and the winding tension.

DRAWINGS

1 is a schematic view showing a winding motion of a conventional winding device;

Figure 2 is a perspective view of the winding device for controlling the movement of the winding head of the present invention;

Figure 3 is a perspective view of a winding drive mechanism for controlling the movement of the winding head;

Figure 4 is a schematic view of the winding drive mechanism for longitudinal linear velocity compensation;

Figure 5 is a schematic view of the winding drive mechanism for lateral linear velocity compensation;

Figure 6 is a schematic view showing the winding motion of the winding device for controlling the movement of the winding head;

Figure 7 is a graph showing the change in the linear velocity of the strip in the winding device for controlling the movement of the winding head;

Figure 8 is a schematic view of a winding device for controlling the movement of a strip according to the present invention;

Fig. 9 is a graph showing the change in the linear velocity of the strip in the winding device for controlling the movement of the strip.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings.

The invention provides a winding device, The winding device comprises a winding head 2 and a winding needle 1. The winding needle 1 is a flat structure as shown in Fig. 1. The winding needle 1 is mounted on the winding head 2 and rotates with the winding head 2 to gradually carry the strip 3 Winding on the winding needle 1. For example, in the manufacturing process of a lithium ion battery, the positive and negative electrode sheets are used as the strip 3, and the strip 3 is gradually wound on the needle 1 which is rotated at a constant speed to form a battery core of the lithium ion battery.

The winding device of the present invention further includes a winding drive mechanism for controlling the belt 3 or the winding head 2 to perform a linear velocity compensation movement.

As shown in FIG. 2, the winding drive mechanism includes a base 4, a compensating control member movably mounted on the base 4, and a motor 6 for driving the compensating control member for controlling the strip 3 or winding The head 2 performs a linear velocity compensation motion. For example, the compensation control member can control the transverse linear velocity compensation movement of the strip 3 along a certain trajectory during the winding process, and the linear velocity is complementary to the linear velocity of the winding of the coil 1 by the rotation of the strip 3, and finally the strip is charged. The linear velocity of 3 is kept within a certain range, and a stable winding tension is maintained. Or the compensating driving member can control the winding head 2 to drive the reel 1 to perform the linear velocity compensating movement along a certain trajectory, and the linear velocity thereof is complementary with the linear velocity of the winding of the reel 1 to drive the strip 3, and finally the strip 3 is finally obtained. The line speed is kept within a certain range.

As shown in FIG. 3 and FIG. 8, the compensation control member includes a driving mechanism 51 driven by the motor 6, and a swinging rod 52. The driving mechanism 51 cooperates with the driving shaft 61 of the motor 6. The driving mechanism 51 can select a cam with good rigidity and long life. The mechanism may also use an eccentric link or the like, or an electronic cam mechanism in a servo motor. The middle portion of the swinging rod 52 is rotatably connected to the base 4. For example, the base 4 is provided with a bearing seat 53. The swing rod is rotatably connected to the base 4 through the bearing housing 53, and one end of the swing rod 52 is driven by the driving mechanism 51, and the other end is The strip 3 or the winding head 2 is interlocked to control the strip 3 or the winding head 2 to perform linear velocity compensation movement according to a certain movement trajectory.

According to different setting manners of the motion trajectory, the linear velocity compensation motion of the winding head 2 or the strip 3 includes a longitudinal linear velocity compensation motion and/or a lateral linear velocity compensation motion, in order to clearly and in detail describe the specific embodiment, when When the strip 3 is fed from above or below the winding head 2, the upper and lower movements of the winding head 2 or the strip 3 are longitudinal linear velocity compensating movements, and the left and right movements of the winding head 2 or the strip 3 are The transverse linear velocity compensation movement; accordingly, if the strip 3 is fed from one side of the winding head 2, the direction of the linear velocity compensation movement is reversed, that is, the longitudinal linear velocity compensating motion causes the winding head 2 or the strip 3 is close to or away from the feeding position of the strip, and the transverse linear velocity compensating motion is perpendicular to the longitudinal linear velocity compensating motion in the same plane.

The first specific implementation method:

As shown in FIGS. 3 and 4, the compensating control member for controlling the winding speed compensation motion of the winding head 2 further includes a winding head mounting member 54 which is mounted on the mounting surface 543 of the winding head mounting member 54. The winder mounts 54 move together and the winder 2 can also be integral with the winder mount 54.

The base 4 and the winder mount 54 form a longitudinally moving pair. For example, in the present embodiment, the base 4 includes a first rail 41 disposed longitudinally, and the winder mount 54 is slidable up and down along the first rail 41.

The drive mechanism 51 includes a first drive mechanism 511, the swing link 52 includes a first swing link 521, and the bearing housing 53 includes a first bearing block 531. The middle portion of the first swing lever 521 is rotatably coupled to the first bearing housing 531. One end of the first swing lever 521 is driven by the first drive mechanism 511, and the other end is movably coupled to the winder mount 54. Specifically, the first swinging rod 521 and the winding head mounting member 54 are connected by a slider, and the winding head mounting member 54 includes a first sliding groove 541 disposed laterally, and the first swinging rod 521 is coupled to the winding head mounting member 54. One end includes a first slider, and the first slider can slide left and right in the first sliding slot 541 to drive the winder mounting member 54 to slide up and down along the first rail 41.

When the first driving mechanism 511 drives the winding head 2 to perform the longitudinal linear velocity compensating motion, the first swinging lever 521 is rotated by the driving of the first driving mechanism 511, for example, the first swinging lever 521 is along the arc from the solid line position of FIG. When the direction of the arrow is rotated to the position of the broken line, the end of the first swinging rod 521 and the winding head mounting member 54 is moved upward, and the winding head mounting member 54 and the winding head 2 are moved upward in the direction of the straight arrow, that is, along the base. The first rail 41 on the seat 4 moves upward.

The present embodiment realizes the manner in which the winding head 2 performs the linear velocity compensation movement in the upper and lower directions under the control of the winding drive mechanism during the winding process of the strip 3, so that the entire needle 1 has an upward or downward line. At the speed, the linear speed is complementary to the linear speed at which the winding needle 1 rotates the belt 3 to wind, and the winding tension received by the strip 3 is effectively adjusted. For example, when the needle 1 is rotated to the horizontal state (ie, state A to state B), the winding head 2 drives the needle 1 to move upward, so that the linear velocity of the strip 3 is reduced, and the tension becomes small; when the needle 1 is rotated to In the vertical state (i.e., state C to state D), the winding head 2 causes the winding needle 1 to move downward, the linear velocity of the strip 3 increases, and the tension increases. As shown in FIG. 7, in the winding device for controlling the movement of the winding head 2, when the winding needle 1 rotates the belt 3, the linear velocity variation curve L1 of the strip 3 is similar to the sinusoidal function of the half waveform, and the winding needle 1 is When the longitudinal compensation motion is performed under the control of the winding drive mechanism, the linear velocity change curve L2 is a cosine function of the half waveform. Since the directions of L1 and L2 are opposite, the sizes are basically complementary, and finally the line speed of the material 3 is kept constant. Within the scope.

Second specific embodiment:

As shown in Figures 3 and 5, similarly, the base 4 can also form a laterally moving pair with the winder mount 54, such as the base 4 including a second rail 42 disposed laterally, the winder mount 54 can also Moves left and right along the second rail 42. In order to smoothly realize the longitudinal and lateral sliding of the winding head mounting member 54 along the first rail 41 and the second rail 42 respectively, a cross shifting plate 43 may be added to the base 4, for example, the first rail 41 may be disposed at The cross shift plate 43 is formed, and the cross shift plate 43 and the second rail 42 form a lateral movement pair.

The driving mechanism 51 of the present embodiment further includes a second driving mechanism 512, the swinging bar further includes a second swinging rod 522, and the bearing housing 53 further includes a second bearing housing 532. The middle portion of the second swing rod 522 is rotatably coupled to the second bearing housing 532. One end of the second swing rod 522 is driven by the second driving mechanism 512, and the other end is movably connected with the winding head mounting member 54, specifically, the second swing rod The 522 and the winding head mounting member 54 are also connected by a slider. The winding head mounting member 54 includes a longitudinally disposed second sliding slot 542, and the end of the second swinging rod 522 connected to the winding head mounting member 54 includes a second slider. The second slider can slide up and down in the second sliding slot 542 to drive the winding head mounting member 54 to slide left and right along the second rail 41.

The second driving mechanism 512 is configured to drive the winder 2 to perform a lateral linear velocity compensation motion. The first drive mechanism 511 and the second drive mechanism 512 can both be cam mechanisms. In order to simultaneously drive the first drive mechanism 511 and the second drive mechanism 512 by a single motor 6, the following can also be achieved by compensating the follower 513, for example using pins or other parts. When the second driving mechanism 512 controls the winding head 2 to perform the transverse linear velocity compensation motion, the second swinging lever 522 is rotated by the driving of the second driving mechanism 512, for example, the second swinging lever 521 is along the arc from the solid line position of FIG. When the direction of the arrow is rotated to the position of the broken line, the end of the second swinging lever 522 and the winding head mounting member 54 is movably moved to the left, and the winding head mounting member 54 is moved to the left in the direction of the straight arrow, that is, along the base 4 The second guide rail 42 moves to the left.

The embodiment also realizes that the winding head 2 performs the linear velocity compensation movement in the left and right directions under the control of the winding drive mechanism during the winding process of the strip 3, even if the entire needle 1 has leftward or rightward Line speed. As shown in Fig. 6, in the horizontal direction, the winding drive mechanism drives the winding needle 2 to move horizontally with its rotation angle, so that the strip 3 is always in a vertical state. As shown in FIG. 7, the positional relationship between the first swinging lever 521 and the second swinging lever 521 in the compensation control member can be corrected and adjusted by a limited number of experimental data, so that the winding needle 1 is only used for the lateral linear velocity compensation motion. The linear velocity change curve L3 of the material 3 forms a sinusoidal function of the half waveform, and after the linear velocity change curve L2 of the winding needle 1 which is only subjected to the longitudinal compensation motion, the linear velocity change curve of the strip 3 is a straight line L4, that is, the belt The linear velocity of the material 3 is kept within a certain range, even achieving uniform motion, maintaining a stable winding tension, and further improving the linear velocity and winding as compared with the manner of controlling only the longitudinal linear velocity compensation movement of the winding head. Tension compensation adjustment accuracy.

It is also possible to perform only the transverse linear velocity compensation motion only by the second drive mechanism 512 and the second swing lever 522 as needed, that is, the longitudinal linear velocity compensation motion is not required.

The third specific embodiment:

In the embodiment shown in FIG. 8, the compensation control member for controlling the linear velocity compensation movement of the strip 3 includes a strip control lever 55 for controlling the lateral linear velocity compensation movement of the strip 3, one end of the strip control rod 55. It is hinged to the swing rod 52, and the other end forms a lateral movement pair with the substrate 4. Specifically, the substrate 4 further includes a third guide rail 43 disposed laterally. The strip control lever 55 further includes a third slider. The third slider can slide laterally along the third rail 43 while controlling the strip 3 to swing laterally to achieve lateral direction. Line speed compensation.

For example, when the driving mechanism 51 rotates in the direction of the curved arrow, the end of the swing lever 52 connected to the strip control lever 55 moves to the right, and the driving strip control rod 55 drives the strip 3 to move to the right along the straight arrow. 1 from state C to state D, the linear velocity of the strip 3 is increased, and the winding tension is increased; accordingly, when the reel is rotated from the state A to the state B, the strip control lever 55 is driven to drive the strip 3 Moving to the left along the straight arrow reduces the linear velocity of the strip 3 and reduces the winding tension.

As shown in FIG. 9, the linear velocity variation curve L1 of the strip 3 is similar to the sinusoidal function of the half waveform. When the strip 3 is subjected to the lateral compensation motion under the control of the winding drive mechanism, the linear velocity variation curve L5 is similar. In the cosine function of the half-waveform, since L1 and L5 are opposite in direction and complementary in size, the strip 6 is finally combined in a certain range and a relatively constant linear velocity.

The invention also protects a winding method by using a winding drive mechanism to control the strip or winding head 2 to perform the above-mentioned lateral or longitudinal linear velocity compensation movement, so that the strip 3 is wound up in the installation. On the winding head 2, on the winding needle 1 which rotates with the winding head 2. The method makes the linear speed of the winding head 2 driving the winding needle 1 to perform the linear velocity compensating movement complementary to the linear speed at which the winding needle 1 rotates the belt 3, or the linear velocity of the strip 3 for the linear velocity compensation movement. The needle 1 rotates to drive the strip 3 to make the winding line speed complementary, so that the strip 3 is wound on the reel 1 by a linear speed which is stabilized within a certain range, in particular, the line speed of the strip 3 is maintained. Within a certain range, the stability of the winding tension is ensured, the degree of tightness of the winding of the strip 3 on the winding needle 1 is balanced, the deformation of the wound product is effectively prevented, and it can be applied to the winding of the lithium ion battery cell. And other fields.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

a winding device, The invention comprises a winding head (2) and a winding needle (1) mounted on the winding head (2) and rotating with the winding head (2) for winding the strip (3), characterized in that: Also included is a winding drive mechanism for controlling the tape (3) or the winding head (2) to perform a linear velocity compensation movement to stabilize the linear velocity of the tape (3) within a certain range.
The apparatus according to claim 1, wherein said winding drive mechanism comprises a base (4), a compensation control member movably mounted on said base (4), and for driving said compensation control member The motor (6), the strip (3) or the winding head (2) is interlocked with the compensation control.
The apparatus according to claim 2, wherein said compensating control member comprises a swinging lever (52) and a driving mechanism (51) driven by said motor (6); a middle portion of said swinging lever (52) The base (4) is rotatably connected, and one end of the swing rod (52) is driven by the driving mechanism (51), and the other end is linked with the strip (3) or the winding head (2).
The device according to claim 3, wherein said compensation control member further comprises a winder mount (54) for mounting said winder (2), said base (4) The winding head mounting member (54) forms a longitudinal moving pair;

The driving mechanism (51) includes a first driving mechanism (511) for driving the winding head (2) for longitudinal linear velocity compensation movement, and the swinging bar (52) includes a first swinging bar (521);

One end of the first rocker (521) is driven by the first drive mechanism (511) and the other end is movably coupled to the winder mount (54).
The apparatus of claim 4 wherein said first rocker (521) is movably coupled to said winder mount (54) by a slider.
The device of claim 4 wherein said first drive mechanism (511) is a cam mechanism.
The device according to claim 3, wherein said compensation control member further comprises a winder mount (54) for mounting said winder (2), said base (4) The winding head mounting member (54) forms a lateral movement pair;

The driving mechanism (51) includes a second driving mechanism (512) for driving the winding head (2) to perform a lateral linear velocity compensating motion, and the swinging bar (52) includes a second swinging lever (522);

One end of the second rocker (522) is driven by the second drive mechanism (512) and the other end is movably coupled to the winder mount (54).
The apparatus of claim 7 wherein said second rocker (522) is movably coupled to said winder mount (54) by a slider.
The device of claim 7 wherein said second drive mechanism (512) is a cam mechanism.
Apparatus according to any one of claims 4 to 6 wherein: The base (4) also forms a lateral movement pair with the winder mount (54);

The drive mechanism (51) further includes a second drive mechanism (512) for driving the winder (2) for lateral linear velocity compensation motion, the swing lever (52) further including a second swing lever (522) );

One end of the second rocker (522) is driven by the second drive mechanism (512) and the other end is movably coupled to the winder mount (54).
The apparatus of claim 10 wherein said first drive mechanism (511) and said second drive mechanism (512) are both cam mechanisms.
The device of claim 10 wherein: The drive mechanism also includes a compensating follower (513) for causing the first drive mechanism (511) and the second drive mechanism (512) to follow.
The apparatus according to claim 3, wherein said compensation control member further comprises a strip control lever (55) for controlling said strip (3) to perform a lateral linear velocity compensating motion; said strip control One end of the rod (55) is hinged to the swing rod (52), and the other end forms a lateral movement pair with the substrate (4).
A winding method, comprising the steps of:

The winding drive mechanism controls the tape (3) or the winding head (2) to perform a linear velocity compensation movement, so that the tape (3) is wound around the winding by a linear velocity stabilized within a certain range. On the head (3), on the winding needle (1) which rotates with the winding head (3).