A feeding device, a winding apparatus, and a winding method

Abstract

The application relates to a feeding device, a winding device and a winding method. The feeding device comprises a cutting mechanism capable of cutting each strip of material passing through in a controlled manner at the same time; a compensation mechanism arranged between the cutting mechanism and a winding needle, the compensation mechanism comprising at least two compensation assemblies corresponding to at least two strips of material one by one, each compensation assembly having a compensation channel for the corresponding strip of material to pass through, and a force applying part applying a force to the strip of material passing through the compensation channel, the strip of material in the compensation channel changing a conveying path under the action of the force and increasing the length of the strip of material in the compensation channel, so as to compensate for the winding length of the strip of material contained in the corresponding battery cell.

Description

Technical Field

[0001] This invention relates to the technical field of battery production equipment, and in particular to a feeding device, winding equipment, and winding method. Background Technology

[0002] In the battery cell manufacturing process, a needle is used to wind electrode strips and separators to form the cell on the needle. Currently, with the advancement of battery production technology and the explosive growth of market demand, higher requirements are being placed on the production efficiency of cell winding.

[0003] To improve the production efficiency of battery cells, the inventors of this application have creatively proposed that multiple battery cells can be simultaneously wound and formed on a single winding needle, such as two battery cells simultaneously. However, in actual production, the inventors of this application have found that the winding length of the electrode strips contained in each battery cell simultaneously wound and formed by the winding needle often varies, resulting in poor quality consistency of the produced battery cells. For battery cells with shorter winding lengths of electrode strips, the amount of active material on the electrode strips is less, resulting in poorer performance of the battery cell. The inventors of this application have found that the difference in the winding length of the electrode strips contained in each battery cell simultaneously wound and formed is mainly caused by the deviation in the thickness of each electrode strip and / or separator. The specific analysis is as follows: Each battery cell is wound and formed following the rotation of the same winding needle, so the number of turns for each battery cell on the same winding needle is the same. However, due to the different thicknesses of the electrode strips and / or separators, the winding lengths of the electrode strips of each battery cell are different under the condition of the same number of turns. Among the various cells that are simultaneously wound on a winding needle (i.e., wound with the same number of turns), the cell formed by a thicker electrode strip and / or separator has a longer winding length of electrode strip; the cell formed by a thinner electrode strip and / or separator has a shorter winding length of electrode strip. Summary of the Invention

[0004] Therefore, it is necessary to provide a feeding device, winding equipment, and winding method to address the problem in the prior art where the thickness of each electrode strip and / or separator is inconsistent, resulting in poor quality consistency among the various battery cells being wound simultaneously on the winding needle.

[0005] A feeding device is arranged upstream of a winding needle, the winding needle being used to wind at least two strips of material to simultaneously wind at least two battery cells. The feeding device includes:

[0006] A cutting mechanism capable of simultaneously and controllably cutting the at least two material strips in transit; and

[0007] A compensation mechanism is arranged between the cutting mechanism and the winding needle. The compensation mechanism includes at least two compensation components corresponding one-to-one with the at least two strips. Each compensation component has a compensation channel through which the corresponding strip passes and a force-applying part that applies a force to the strip passing through the compensation channel. Under the action of the force, the strip passing through the compensation channel changes its conveying path and increases the length of the strip located in the compensation channel to compensate for the winding length of the strip contained in the corresponding battery cell.

[0008] In one embodiment, each of the compensation components includes a plurality of guide rollers arranged along the compensation channel, a portion of which is located on one side of the material belt and another portion is located on the opposite side of the material belt; at least one of the plurality of guide rollers is controllably moved toward the material belt to act as a force-applying part to change the conveying path of the material belt.

[0009] In one embodiment, the plurality of guide rollers includes at least two fixed guide rollers and a movable guide roller, the two fixed guide rollers being located on the same side of the material belt and the movable guide roller being located on the opposite side of the material belt; the movable guide roller can be controlled to enter the space between the two fixed guide rollers to act as the force-applying part to drive the material belt through which it passes to change the conveying path.

[0010] In one embodiment, the compensation mechanism further includes a compensation mounting bracket, and each of the compensation components further includes a compensation movable bracket;

[0011] Each of the two fixed rollers of the compensation assembly is rotatably connected to the compensation mounting frame, the movable compensation bracket is controllably movable and connected to the compensation mounting frame, and the movable roller is rotatably connected to the movable compensation bracket.

[0012] In one embodiment, each of the compensation components further includes a compensation drive structure and a drive block, the compensation mounting bracket has a fifth side and a sixth side that are opposite to each other in a first direction, and the compensation mounting bracket also has a clearance groove that passes through the fifth side and the sixth side;

[0013] The compensation drive structure is located on the fifth side, and the compensation movable bracket is located on the sixth side; the drive block passes through the clearance groove, and one end of the drive block is driven to be connected to the compensation drive structure, and the other end of the drive block is connected to the compensation movable bracket.

[0014] In one embodiment, the compensation drive structure includes a compensation drive component, a belt drive module, and a lead screw drive module, all disposed on the fifth side;

[0015] The belt drive module is connected between the rotary output shaft of the compensation drive component and the lead screw drive module, and the drive block is connected to the lead screw drive module.

[0016] In one embodiment, the compensation mounting bracket has a first end and a second end that are opposite to each other in a third direction perpendicular to the first direction, the fixed roller and the movable roller of each compensation component are located at the first end, and the compensation drive member and the belt drive module of each compensation drive structure are located at the second end.

[0017] In one embodiment, the compensation mechanism further includes a compensation mounting frame, on which each of the compensation components is mounted;

[0018] The compensation mounting bracket can be moved in a controlled manner toward or away from the cutting mechanism.

[0019] In one embodiment, the at least two material strips are both conveyed along a first direction and spaced apart along a second direction perpendicular to the first direction; the feeding device further includes a feeding mechanism disposed between the compensation mechanism and the winding needle, the feeding mechanism including at least two correction feeding components corresponding one-to-one with the at least two material strips, each correction feeding component including:

[0020] The correction seat can be controlled to move along the second direction; and

[0021] Feed rollers, mounted on the corrective movable seat, are used to convey the corresponding material strip downstream to the winding needle;

[0022] In the first direction, the feed rollers of each of the correction feeding components are arranged at intervals; in the second direction, the feed rollers of each of the correction feeding components are arranged at intervals.

[0023] A winding apparatus includes a winding device and a feeding device as described in any of the above embodiments, the winding device having the controllably rotatable winding needle.

[0024] A winding method using the winding equipment described in any of the above embodiments includes a winding step and a strip finishing step performed sequentially.

[0025] The winding step includes: the at least two strips sequentially pass through the compensation channels of the cutting mechanism and the corresponding compensation components, and arrive at the winding needle; the winding needle rotates to wind the at least two strips onto the winding needle respectively, so as to simultaneously wind and form at least two battery cells;

[0026] The strip finishing step includes:

[0027] a. The winding length of the strip contained in each cell on the winding needle is detected respectively, and the cell whose winding length of the strip is less than the preset length is the cell to be compensated.

[0028] b. Control the force-applying part of the compensation component corresponding to the battery cell to be compensated to apply a force to the material strip passing through, thereby increasing the length of the material strip located in the compensation channel;

[0029] c. The cutting mechanism cuts each of the passing material strips simultaneously, so that all the cut material strips are wound onto the winding needle.

[0030] In one embodiment, in step a: the battery cell with the longest strip winding length among all the battery cells is the standard battery cell, and the preset length is the strip winding length contained in the standard battery cell.

[0031] In actual use, the aforementioned feeding device, winding equipment, and winding method involve each strip of material passing sequentially through the cutting mechanism and the compensation mechanism, and then winding it onto the winding needle. When each cell on the winding needle is almost finished winding, the cutting mechanism cuts off each strip of material that has passed through. The winding needle continues to wind until the tail end of each strip of material is completely wound onto the winding needle (i.e., finishing), at which point one winding operation is completed.

[0032] Thus, before the cutting mechanism cuts each strip, the force application parts of each compensation component can be controlled to apply force to the strip passing through the compensation channel, thereby adjusting the length of the strip passing through each compensation channel. This ensures that when the cutting mechanism cuts each strip, the length of the strip already contained in each cell on the winding needle plus the length of the strip between the winding needle and the cutting mechanism are equal. Consequently, after the finishing is completed, the winding length of the strip contained in each cell on the winding needle is consistent, thus ensuring better quality consistency of each cell. Attached Figure Description

[0033] Figure 1 This is a front view of the feeding device in one embodiment of the present invention;

[0034] Figure 2 for Figure 1 The side view of the feeding device shown;

[0035] Figure 3 for Figure 1 The front view of the compensation mechanism of the feeding device is shown.

[0036] Figure 4 for Figure 3 A top view of the compensation mechanism shown;

[0037] Figure 5 for Figure 3 A bottom view of the compensation mechanism shown;

[0038] Figure 6 for Figure 1 Side view of the feeding mechanism of the feeding device shown;

[0039] Figure 7 for Figure 6 A top view of the feeding mechanism shown;

[0040] Figure 8 for Figure 7 The diagram shown omits some components of the feeding mechanism.

[0041] Figure 9 for Figure 1 The front view of the clamping mechanism of the feeding device shown;

[0042] Figure 10 for Figure 9 A top view of the clamping mechanism shown;

[0043] Figure 11 for Figure 1 The diagram shows the structure of the cutting mechanism of the feeding device.

[0044] Figure 12 This is a flowchart illustrating the steps of a winding method in one embodiment of the present invention;

[0045] Figure 13 This is a flowchart of the strip finishing step in the winding method according to an embodiment of the present invention;

[0046] Figure 14 This is a flowchart of the feeding step in the winding method according to an embodiment of the present invention. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] Please see Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a feeding device for feeding at least two strips conveyed along a first direction X into a winding needle (not shown), so that the winding needle can simultaneously wind and form at least two battery cells. Specifically, the strips are spaced apart along a second direction Y perpendicular to the first direction X, and the winding needle extends longitudinally along the second direction Y. Therefore, the battery cells wound on the winding needle are spaced apart along the second direction Y. It should be noted that the strips can be electrode strips, and each battery cell is formed by winding the electrode strip and a separator. For ease of description, this article only describes the winding process of the electrode strip.

[0054] Please see Figures 3 to 5 In an embodiment of the present invention, the feeding device includes a cutting mechanism 20 and a compensation mechanism 30. The cutting mechanism 20 is arranged upstream of the coil needle, and the compensation mechanism 30 is arranged between the cutting mechanism 20 and the coil needle, that is, the compensation mechanism 30 is located downstream of the cutting mechanism 20 and upstream of the coil needle.

[0055] The compensation mechanism 30 includes at least two compensation components 32 corresponding one-to-one with the aforementioned at least two material strips. Each compensation component 32 has a compensation channel and a force-applying part. The compensation channel is used for the corresponding material strip to pass through. The force-applying part is used to apply a force to the material strip passing through the compensation channel, causing the material strip passing through the compensation channel to change its conveying path under the action of the force and increase the length of the material strip located in the compensation channel, so as to compensate for the winding length of the material strip contained in the corresponding battery cell.

[0056] In actual use, each strip of material passes sequentially through the cutting mechanism 20 and the compensation mechanism 30, and is then wound onto the winding needle. When each cell on the winding needle is almost finished winding, the cutting mechanism 20 cuts off each strip of material that has passed through. The winding needle continues to wind until the tail end of each strip of material is completely wound onto the winding needle (i.e., finishing), at which point one winding operation is completed.

[0057] Before the cutting mechanism 20 cuts each strip, the feeding device can control the force application parts of each compensation component 32 to apply force to the strip passing through the compensation channel, thereby adjusting the length of the strip passing through each compensation channel. This ensures that when the cutting mechanism 20 cuts each strip, the length of the strip already wound around each cell on the winding needle is equal to the sum of the strip length between the winding needle and the cutting mechanism 20. This ensures that the strip winding length of each cell on the winding needle is consistent after finishing, thus ensuring better quality consistency of each cell.

[0058] For example, the winding needle simultaneously winds the first and second strips, thereby forming the first and second battery cells respectively. That is, the first strip is wound onto the winding needle to form the first battery cell, and simultaneously the second strip is wound onto the winding needle to form the second battery cell. If the first strip and / or diaphragm used to form the first battery cell are thicker, and the second strip and / or diaphragm used to form the second battery cell are thinner, then during synchronous winding, the winding length of the first battery cell strip will be longer, and the winding length of the second battery cell strip will be shorter. To compensate for the winding length of the second battery cell strip, before the cutting mechanism 20 cuts the first and second strips, the force-applying part of the corresponding compensation component 32 can be adjusted to apply force to the second strip passing through the compensation channel, causing a change in the conveying path of the second strip passing through the compensation channel, thereby increasing the length of the second strip passing through the compensation channel. When the cutting mechanism 20 cuts the first and second strips, the sum of the length of the first strip already wound on the first battery cell and the length of the first strip between the winding needle and the cutting mechanism 20 is approximately equal to the sum of the length of the second strip already wound on the second battery cell and the length of the second strip between the winding needle and the cutting mechanism 20. This ensures that the length of the strip wound on the first and second batteries is approximately equal after the finishing process, thus ensuring better quality consistency of each battery cell.

[0059] It should be noted that, in order to solve the problem of inconsistent material strip winding lengths among the individual battery cells simultaneously wound on the winding needle, resulting in poor quality consistency among the individual cells, the inventors of this application have creatively set up a compensation mechanism 30 between the cutting mechanism 20 and the feeding mechanism 40. This compensation mechanism 30 independently adjusts the length of each material strip passing through it, thereby compensating for battery cells with shorter material strip winding lengths on the same winding needle. This ensures that the material strip winding lengths of all battery cells produced on the same winding needle are consistent, thus guaranteeing better quality consistency among the individual cells.

[0060] It should also be noted that each compensation component 32 is arranged at intervals along the second direction Y, so that each compensation component 32 is aligned with each material strip, thereby enabling each material strip to enter the compensation channel of the corresponding compensation component 32.

[0061] It should also be noted that the winding length of the strip for each battery cell wound on the winding needle can be detected in real time by a detector. Then, the force-applying part of the compensation component 32 adjusts the force applied to the strip according to the winding length detected by the detector, thereby changing the conveying path of the strip passing through the compensation channel, that is, adjusting the length of the strip passing through the compensation channel, so as to compensate for the winding length of the strip contained in the battery cell. Of course, the arrangement position and specific structure of the detector are not limited here, as long as it can detect the winding length of the strip contained in each battery cell on the winding needle in real time.

[0062] It should also be noted that the force applied by the force-applying part to the conveyor belt can be a contact force in which the force-applying part directly contacts the conveyor belt and causes the conveyor belt to change its conveying path. Of course, in other embodiments, the force applied by the force-applying part to the conveyor belt can also be a non-contact force, such as the air pressure applied to the conveyor belt by the force-applying part blowing air, which can also cause the conveyor belt to change its conveying path, and is not limited here.

[0063] In some embodiments, each compensation assembly 32 includes a plurality of guide rollers arranged along a compensation channel. A portion of these guide rollers is located on one side of the conveyor belt (i.e., the conveyor belt passing through the compensation channel), and another portion is located on the opposite side of the conveyor belt (i.e., the conveyor belt passing through the compensation channel). At least one of the guide rollers can be controllably moved toward the conveyor belt to act as a force-applying element, causing the conveyor belt to change its conveying path, thereby increasing the length of the conveyor belt passing through the compensation channel. Preferably, the compensation channel of each compensation assembly 32 extends longitudinally along a first direction X, i.e., the plurality of guide rollers are spaced apart along the first direction X, so that the two clamping plates 17 of the clamping mechanism 10 pass between the guide rollers, thereby feeding the cut end of the conveyor belt into the feeding mechanism 40.

[0064] In one specific embodiment, the plurality of guide rollers includes at least two fixed guide rollers 321 and a movable guide roller 323. The two fixed guide rollers 321 are located on the same side of the material belt. The movable guide roller 323 is located on the opposite side of the material belt. The movable guide roller 323 can controllably enter or exit the space between the two fixed guide rollers 321. When the movable guide roller 323 enters the space between the two fixed guide rollers 321, the movable guide roller 323 acts as the aforementioned force-applying part, causing the material belt to change its conveying path, thereby increasing the length of the material belt passing through the compensation channel.

[0065] Thus, when it is necessary to increase the length of the material belt passing through the compensation channel, the movable guide roller 323 is controlled to move toward the space between the two fixed guide rollers 321 (i.e., as...). Figure 3(As shown, moving to the left), thus causing the material belt passing through the compensation channel to form an "S" shape, successively winding around the upstream fixed roller 321, the movable roller 323, and the downstream fixed roller 321. As the moving distance of the movable roller 323 increases, the bending angle of the "S" shape of the material belt increases, resulting in a longer length of material belt passing through the compensation channel. When it is not necessary to increase the length of the material belt passing through the compensation channel, the movable roller 323 is controlled to move out of the space between the two fixed rollers 321 (i.e., as shown). Figure 3 As shown (moving to the right), the bending angle of the material belt in an "S" shape decreases (i.e., the material belt becomes straighter) as the moving distance of the movable roller 323 increases, until the material belt passing through the compensation channel is in a straight state. It should be noted that the movement of the movable roller 323 can be along a straight line, or along a curve or zigzag line, as long as it can enter or exit the space between the two fixed rollers 321, and is not limited here.

[0066] Preferably, the two fixed guide rollers 321 are spaced apart along the first direction X, so that the two clamping plates 17 of the clamping mechanism 10 can pass between the two fixed guide rollers 321 and the movable guide roller 323 along the first direction X, thereby feeding the cut end of the material strip into the feeding mechanism 40. Specifically Figure 3 In the illustrated embodiment, the strip passes sequentially from top to bottom around the right side of the upper fixed roller 321, the left side of the movable roller 323, and the right side of the lower fixed roller 321. Thus, when the movable roller 323 moves to the left and enters the space between the two fixed rollers 321, the length of the strip winding between the two fixed rollers 321 and the movable roller 323 increases; when the movable roller 323 moves to the right and exits the space between the two fixed rollers 321, the length of the strip winding between the two fixed rollers 321 and the movable roller 323 decreases.

[0067] Furthermore, the compensation mechanism 30 also includes a compensation mounting frame 31, and each compensation component 32 also includes a compensation movable support 322. The two fixed guide rollers 321 of each compensation component 32 are rotatably connected to the compensation mounting frame 31. The compensation movable support 322 is controllably movable and connected to the compensation mounting frame 31, and the movable guide roller 323 is rotatably connected to the compensation movable support 322. Thus, by integrating the two fixed guide rollers 321 and the movable guide roller 323 onto the compensation mounting frame 31, the compactness of the structure is further improved. Moreover, when the compensation movable support 322 moves relative to the compensation mounting frame 31, it can drive the movable guide roller 323 into or out of the space between the two fixed guide rollers 321, thereby changing the conveyor path of the material belt and thus adjusting the length of the material belt passing through the compensation channel.

[0068] Optionally, the compensation mounting bracket 31 is provided with a second slide rail 311, and the compensation movable bracket 322 is provided with a second slider 3221 that slides with the second slide rail 311, so that the movement of the compensation movable bracket 322 relative to the compensation mounting bracket 31 is guided by the movement of the second slider 3221 along the second slide rail 311.

[0069] Optionally, each compensation component 32 further includes a first fixed bracket 3212a and a second fixed bracket 3212b, both fixedly connected to the compensation mounting frame 31. The two fixed guide rollers 321 are the first fixed guide roller 321a and the second fixed guide roller 321b, respectively. The first fixed guide roller 321a is rotatably connected to the first fixed bracket 3212a, and the second fixed guide roller 321b is rotatably connected to the second fixed bracket 3212b.

[0070] Optionally, each compensation component 32 further includes a first rotating shaft 3211a, which is fixedly connected to a first fixed bracket 3212a. A first fixed guide roller 321a is sleeved on the first rotating shaft 3211a and is rotatable about the first rotating shaft 3211a. Each compensation component 32 also includes a second rotating shaft 3211b, which is fixedly connected to a second fixed bracket 3212b. A second fixed guide roller 321b is sleeved on the second rotating shaft 3211b and is rotatable about the second rotating shaft 3211b.

[0071] It should be noted that in other embodiments, each compensation component 32 may share the first fixed bracket 3212a and the first rotating shaft 3211a. That is, there is only one first fixed bracket 3212a and one first rotating shaft 3211a. All the first fixed rollers 321a of each compensation component 32 are sleeved on the same first rotating shaft 3211a, which is fixedly connected to the first fixed bracket 3212a.

[0072] Similarly, each compensation component 32 can also share the second fixed bracket 3212b and the second rotating shaft 3211b. That is, there is only one second fixed bracket 3212b and one second rotating shaft 3211b. All the second fixed rollers 321b of each compensation component 32 are sleeved on the same second rotating shaft 3211b, which is fixedly connected to a second fixed bracket 3212b.

[0073] Specifically, in each embodiment, each compensation component 32 further includes a compensation drive structure (not shown) and a drive block 34. The compensation mounting frame 31 has a fifth side c5 and a sixth side c6 that are opposite to each other in the first direction X, and the compensation mounting frame 31 also has a clearance groove 312 that passes through the fifth side c5 and the sixth side c6. The compensation drive structure is disposed on the fifth side c5 of the compensation mounting frame 31, and the compensation movable bracket 322 is located on the sixth side c6 of the compensation mounting frame 31. The drive block 34 passes through the clearance groove 312, and one end of the drive block 34 is drivenly connected to the compensation drive structure, and the other end of the drive block 34 is connected to the compensation movable bracket 322. In this way, the compensation drive structure drives the compensation movable bracket 322 to move relative to the compensation mounting frame 31 through the drive block 34, thereby driving the movable guide roller 323 to enter or exit the space between the two fixed guide rollers 321.

[0074] It should be noted that the compensation drive structure and the compensation movable bracket 322 are respectively set on the fifth side c5 and the sixth side c6 of the compensation mounting frame 31 in the first direction X. On the one hand, this avoids the compensation drive structure from interfering with the movement of the compensation movable bracket 322, the movable roller 323 and the material belt, and facilitates maintenance. On the other hand, it makes full use of the space on both sides of the compensation mounting frame 31 in the first direction X, improves the space utilization rate and makes the structure more compact.

[0075] Specifically, in this embodiment, the compensation drive structure includes a compensation drive component 3311, a belt drive module 331, and a lead screw drive module 332, all disposed on the fifth side c5 of the compensation mounting frame 31. The belt drive module 331 is driveably connected between the rotary output shaft of the compensation drive component 3311 and the lead screw drive module 332, so that the belt drive module 331 transmits the rotational motion output by the compensation drive component 3311 to the lead screw drive module 332. The drive block 34 is driveably connected to the lead screw drive module 332, so that the lead screw drive module 332 converts the rotational motion into linear motion transmitted to the drive block 34, causing the drive block 34 to move along the clearance groove 312, thereby driving the compensation movable bracket 322 and the movable guide roller 323 to move, so that the movable guide roller 323 enters or exits the space between the two fixed guide rollers 321. Optionally, the compensation drive component 3311 can be a motor.

[0076] Furthermore, the compensation mounting frame 31 has a first end c7 and a second end c8 that are opposite to each other in the third direction Z. The fixed guide roller 321 and the movable guide roller 323 of each compensation component 32 are located at the first end c7 of the compensation mounting frame 31, and the compensation drive component 3311 and the belt drive module 331 of each compensation drive structure are located at the second end c8 of the compensation mounting frame 31. In this way, on the one hand, the compensation drive component 3311 and the belt drive module 331 of each compensation drive structure are arranged with the fixed guide roller 321 and the movable guide roller 323 of each compensation component 32 at opposite ends of the compensation mounting frame 31 in the third direction Z, avoiding interference between the compensation drive component 3311 and the belt drive module 331 and the material belt; on the other hand, the space at both ends of the compensation mounting frame 31 in the third direction Z is fully utilized, improving space utilization and making the structure more compact.

[0077] Furthermore, the belt drive module 331 includes a second drive pulley 3312, a second drive belt 3313, and a second driven pulley 3314. The screw drive module 332 includes a compensating screw 3321 and a compensating screw nut 3322. The second drive pulley 3312 is mounted on the rotating output shaft of the compensating drive member 3311, enabling the compensating drive member 3311 to drive the second drive pulley 3312 to rotate. The compensating screw 3321 is rotatably mounted on the compensating mounting bracket 31, and the second driven pulley 3314 is mounted on the compensating screw 3321, enabling the second driven pulley 3314 to rotate synchronously with the compensating screw 3321. The second drive belt 3313 is sleeved between the second drive pulley 3312 and the second driven pulley 3314, enabling the second drive pulley 3312 to drive the second driven pulley 3314 to rotate via the second drive belt 3313. The compensating screw nut 3322 is threaded onto the compensating screw 3321 and fixedly connected to the drive block 34, so that the compensating screw nut 3322 can move synchronously with the drive block 34.

[0078] Thus, when the compensation drive 3311 drives the second drive wheel 3312 to rotate, the second drive wheel 3312 drives the second driven wheel 3314 to rotate via the second transmission belt 3313. The second driven wheel 3314 drives the compensation screw 3321 to rotate. The compensation screw 3321 drives the compensation screw nut 3322 to move along the axial direction of the compensation screw 3321. The compensation screw nut 3322 drives the drive block 34 to move. The drive block 34 drives the compensation movable bracket 322 and the movable roller 323 to move, so as to complete the length adjustment of the material belt passing through the compensation channel.

[0079] In one specific embodiment, there are two compensation components 32 and two strips. It should be noted that the two strips are arranged side-by-side along the second direction Y and both are conveyed along the first direction X, so that the two strips sequentially pass through the clamping mechanism 10, the cutting mechanism 20, the compensation mechanism 30, and the feeding mechanism 40, and are finally wound onto the winding needle, meaning the winding needle can simultaneously wind two battery cells. At the compensation mechanism 30, the two strips pass through the compensation channels of the two compensation components 32 respectively, so that the length of the strip passing through the compensation channel can be adjusted by changing the conveying path of the strip passing through the compensation channel, thereby compensating for the strip winding length of each battery cell on the winding needle, so that the strip winding length contained in each battery cell is consistent.

[0080] Specifically, in this embodiment, the compensation mounting frame 31 can be controlled to move closer to or further away from the cutting mechanism 20 along the first direction X, so as to avoid the process of removing waste segments from the ends of each strip. Thus, when it is necessary to remove waste segments from the ends of each strip, the compensation mounting frame 31 moves closer to the cutting mechanism 20 along the first direction X to a avoidance position, so that the waste removal mechanism can move into the position between the compensation mechanism 30 and the winding needle, thereby allowing the waste segments of each strip (the waste segments being the starting segments of the strip) to pass sequentially through the compensation channels of the cutting mechanism 20 and the corresponding compensation component 32, and be simultaneously wound onto the waste removal mechanism. After all the waste segments of each strip have passed through the cutting mechanism 20, the cutting mechanism 20 cuts each strip simultaneously, and the waste removal mechanism continues to wind up the cut waste segments. After all the waste segments of each strip have been wound up, the waste removal mechanism exits the position between the compensation mechanism 30 and the winding needle. After the waste removal mechanism exits the position between the compensation mechanism 30 and the winding needle, the compensation mounting bracket 31 moves away from the cutting mechanism 20 along the first direction X to the initial position, so as to compensate the winding length of the material strip of each battery cell during the winding process of the winding needle.

[0081] It should be noted that during the simultaneous winding of waste sections from each strip by the waste removal mechanism, the varying thickness of the strips results in differences in the winding length of the waste sections. This means that while some strips may have completely passed through the cutting mechanism 20, others may not have. To ensure complete removal of waste sections from each strip, the cutting mechanism 20 must wait until all waste sections have passed through before cutting each strip. This inevitably leads to the removal of some good sections, resulting in waste of the strips.

[0082] To avoid wasting material strips, during the simultaneous winding of waste segments from each strip by the waste removal mechanism, compensation components 32 can be used to compensate for the winding length of each strip wound on the waste removal mechanism. This ensures that all waste segments from each strip pass through the cutting mechanism 20 simultaneously, thereby ensuring that the cutting mechanism 20 can accurately and simultaneously cut off the waste segments from each strip. It is understood that the compensation principle of each compensation component 32 during the waste segment winding process is the same as the compensation principle during the needle winding process, and therefore will not be elaborated upon here.

[0083] It should also be noted that the specific structure of the waste removal mechanism and the specific operation process of the waste winding section can both adopt relatively mature existing technologies, so they will not be elaborated here.

[0084] Please see Figure 1 and Figure 2 As shown, the feeding device further includes a third drive mechanism 70, and the compensation mounting frame 31 is movably connected to the base along the first direction X. The third drive mechanism 70 is disposed on the base and is drivenly connected to the compensation mounting frame 31 to drive the compensation mounting frame 31 to move along the first direction X.

[0085] Further, the third drive mechanism 70 includes a third drive member (not shown), a third lead screw (not shown), and a third lead screw nut (not shown). The third lead screw is rotatably connected to the base, and its axial direction is parallel to the first direction X. The third drive member is mounted on the base and driven by the third lead screw, enabling it to drive the third lead screw to rotate. The third lead screw nut is threaded onto the third lead screw and fixedly connected to the compensation mounting bracket 31, allowing the compensation mounting bracket 31 to move together with the third lead screw nut. Thus, when the third drive member drives the third lead screw to rotate, the third lead screw drives the third lead screw nut to move along the first direction X, and the third lead screw nut drives the compensation mounting bracket 31 to move along the first direction X. Optionally, the third drive member can be a motor.

[0086] Optionally, the compensation mounting bracket 31 is provided with a compensation slider (not shown in the figure) that slides in cooperation with the guide rail a1, so as to guide the movement of the compensation mounting bracket 31 relative to the base in the first direction X by the movement of the compensation slider along the guide rail a1.

[0087] Please see Figure 1 and Figure 2As shown, in an embodiment of the present invention, the feeding device further includes a clamping mechanism 10 and a feeding mechanism 40. The clamping mechanism 10 is arranged upstream of the cutting mechanism 20 and can controllably clamp each passing strip. It can also controllably move closer to the feeding mechanism 40 along a first direction X, so as to drive each strip to pass sequentially through the compensation channels of the cutting mechanism 20 and the compensation mechanism 30, and then enter the feeding mechanism 40. The feeding mechanism 40 is arranged between the compensation mechanism 30 and the winding needle, and is used to feed each strip downstream into the winding needle. Optionally, the strip can be an electrode strip. Of course, in other embodiments, other types of strips can also be used, which are not limited here.

[0088] In the actual winding operation, each strip of material passes sequentially through the clamping mechanism 10, the cutting mechanism 20, the compensation mechanism 30, and the feeding mechanism 40, and then enters the winding needle. The winding needle rotates to wind each strip of material separately, that is, at least two strips of material are wound into at least two battery cells on the winding needle.

[0089] When the individual cells on the winding needle are almost finished winding, a finishing operation is required: First, the clamping mechanism 10 clamps each passing strip, and the cutting mechanism 20 cuts each passing strip. Then, the winding needle continues winding until all the cut strips are wound (i.e., finishing), at which point the finishing operation is complete. For the next winding, a feeding operation is required: First, the clamping mechanism 10 moves towards the feeding mechanism 40 along the first direction X, causing the cut ends of each strip to pass through the compensation channels of the cutting mechanism 20 and the compensation mechanism 30 and enter the feeding mechanism 40. Then, the clamping mechanism 10 releases each strip and returns to its initial position. The feeding mechanism 40 inserts each strip into a new winding needle, which rotates to wind each strip individually, completing the winding operation according to the above steps.

[0090] Please see Figures 6 to 8 As shown, in an embodiment of the present invention, the feeding mechanism 40 includes at least two correction feeding components 41 corresponding one-to-one with the aforementioned at least two material strips. Each correction feeding component 41 includes a correction movable seat 410 and a feeding roller 411. The correction movable seat 410 is controllably movable along the second direction Y. The feeding roller 411 is disposed on the correction movable seat 410 and is used to convey the corresponding material strip downstream to the winding needle for winding. Specifically, in the first direction X, the feeding rollers 411 of each correction feeding component 41 are spaced apart. In the second direction Y, the feeding rollers 411 of each correction feeding component 41 are also spaced apart, so that each material strip can enter the corresponding feeding roller 411 respectively.

[0091] During feeding, the aforementioned feeding mechanism 40 uses a clamping mechanism 10 to hold each strip of material, while a cutting mechanism 20 cuts each strip along its path. The clamping mechanism 10 moves towards the feeding mechanism 40 along the first direction X until the cut ends of each strip pass through the compensation channels of the cutting mechanism 20 and the compensation mechanism 30, reaching each feeding roller 411, so that the cut ends of each strip enter their respective feeding rollers 411. Then, the correction seats 410 of each correction feeding assembly 41 are controlled to move along the second direction Y, thereby driving the feeding rollers 411 and the strips entering the feeding rollers 411 to move along the second direction Y, thus correcting the strips in the second direction Y. After correction is in place, each feeding roller 411 conveys its corresponding strip downstream to the winding needle, completing one feeding cycle.

[0092] Thus, because the feed rollers 411 are spaced apart in the second direction Y, each feed roller 411 is aligned with its corresponding material strip in the first direction X, thereby ensuring that each material strip can accurately enter its corresponding feed roller 411. Since the feed rollers 411 are spaced apart in the first direction X, they are not aligned in the second direction Y. Therefore, when the feed rollers 411 move along the second direction Y for correction, they will not interfere with each other, and this arrangement increases the space for adjusting each feed roller 411, reducing the difficulty of adjustment.

[0093] In some embodiments, each feed roller pair 411 includes a fixed roller 4110 and a movable roller 4112, both disposed on the correction movable seat 410. Both the fixed roller 4110 and the movable roller 4112 are rotatable relative to the correction movable seat 410. A feed channel is formed between the movable roller 4112 and the fixed roller 4110 for the corresponding material strip to pass through, and at least one of them can move closer to or further away from the other. Thus, after the clamping mechanism 10 feeds each material strip into the feed channel between the movable roller 4112 and the fixed roller 4110 of the corresponding feed roller pair 411, the material strip can be clamped by the movable roller 4112 and the fixed roller 4110.

[0094] In a specific embodiment, each web-correcting feeding assembly 41 further includes a rotary drive 413 and a movable support 417. A fixed roller 4110 is rotatably connected to the web-correcting movable seat 410. The rotary drive 413 is disposed on the web-correcting movable seat 410 and is drivenly connected to the fixed roller 4110 to drive the fixed roller 4110 to rotate relative to the web-correcting movable seat 410. The movable support 417 is movably connected to the web-correcting movable seat 410, and the movable roller 4112 is rotatably connected to the movable support 417.

[0095] During the movement of the movable bracket 417 relative to the correction movable seat 410, it can drive the movable roller 4112 to move closer to or away from the fixed roller 4110. Thus, after the clamping mechanism 10 feeds the cut ends of each strip into the feeding channel between the fixed roller 4110 and the movable roller 4112 of each feeding pair of rollers 411, it controls the movement of each movable bracket 417, causing the movable roller 4112 of each feeding pair of rollers 411 to move closer to the fixed roller 4110 until the movable roller 4112 of each feeding pair of rollers 411 clamps the cut ends of the strip with the fixed roller 4110. Then, it controls each correction movable seat 410 to move along the second direction Y, thereby achieving correction of each strip. After the correction is in place, each rotary drive component 413 drives the fixed roller 4110 of each feed roller pair 411 to rotate, thereby driving each strip of material downstream through friction (at this time, the movable roller 4112 is also driven to rotate, but in the opposite direction to the rotation of the fixed roller 4110), until the cut end of each strip of material is inserted into the winding needle. After the cut end of each strip of material is inserted into the winding needle, each movable bracket 417 drives the movable roller 4112 of each feed roller pair 411 to move away from the fixed roller 4110, thereby causing the fixed roller 4110 and movable roller 4112 of each feed roller pair 411 to loosen the strip of material. The rotation of the winding needle is controlled so that each strip of material is wound onto the winding needle, that is, at least two battery cells are wound and formed simultaneously.

[0096] In a specific embodiment, the feeding mechanism 40 further includes a mounting base 42, and each correction movable seat 410 is movably connected to the mounting base 42 along the second direction Y. Each correction feeding assembly 41 further includes a correction drive 419, which is disposed on the mounting base 42 and drivenly connected to the corresponding correction movable seat 410 to drive the correction movable seat 410 to move along the second direction Y, thereby realizing the correction of the corresponding material strip. Optionally, the correction drive 419 can be an electric cylinder.

[0097] Optionally, each correction movable seat 410 is provided with a correction slide rail 421 on the mounting base 42, and the correction slide rail 421 extends longitudinally along the second direction Y. Each correction movable seat 410 is provided with a correction slider 4101 that slides in cooperation with the corresponding correction slide rail 421. In this way, the movement of the correction slider 4101 along the correction slide rail 421 guides the movement of the correction movable seat 410 relative to the mounting base 42 in the second direction Y.

[0098] In a specific embodiment, each correction feeding assembly 41 further includes a roller 412, which is rotatably connected to the correction movable seat 410. A fixed roller 4110 is mounted on the roller 412 to rotate synchronously with the roller 412. A rotation drive 413 is drivenly connected to the roller 412 to drive the roller 412 to rotate, thereby the roller 412 drives the fixed roller 4110 to rotate.

[0099] Furthermore, each correction feed assembly 41 also includes a first drive wheel 414, a first transmission belt 415, and a first driven wheel 416. The first drive wheel 414 is mounted on the output shaft of the rotary drive 413, the first driven wheel 416 is mounted on the roller shaft 412, and the first transmission belt 415 is sleeved on the first drive wheel 414 and the first driven wheel 416. Thus, when the rotary drive 413 drives the first drive wheel 414 to rotate, the first drive wheel 414 drives the first driven wheel 416 to rotate via the first transmission belt 415, and the first driven wheel 416 then drives the roller shaft 412 and the fixed roller 4110 on the roller shaft 412 to rotate. Optionally, the rotary drive 413 can be a motor.

[0100] Optionally, there are two correction feeding components 41 and two feed strips. It should be noted that the two feed strips are arranged side-by-side along the second direction Y and both are conveyed along the first direction X, so that the two feed strips pass sequentially through the clamping mechanism 10, the cutting mechanism 20, and the feeding mechanism 40, and are finally wound onto the winding needle, meaning the winding needle can simultaneously wind two battery cells. At the feeding mechanism 40, since the feeding rollers 411 of the two correction feeding components 41 are spaced apart along the second direction Y, the two feed strips can pass through the feeding rollers 411 of the two correction feeding components 41 respectively, so that the feeding rollers 411 of the two correction feeding components 41 can respectively correct and feed the two feed strips. Of course, the number of correction feeding components 41 and feed strips is not limited to two; it can also be, for example, three or four, etc., and is not limited here.

[0101] In one specific embodiment, the mounting base 42 has a first side c1 and a second side c2 that are opposite to each other in the first direction X. There are two web-correcting feeding assemblies 41 (i.e., two strips of material, each fed into a winding needle by one web-correcting feeding assembly 41, allowing the winding needle to simultaneously wind two battery cells). Since there are two web-correcting feeding assemblies 41, there are also two web-correcting movable seats 410. One of the two web-correcting movable seats 410 is located on the first side c1 of the mounting base 42, and the other is located on the second side c2 of the mounting base 42. Thus, by respectively setting the two web-correcting movable seats 410 on the first side c1 and the second side c2 of the mounting base 42 in the first direction X, the two feeding rollers 411 respectively mounted on the two web-correcting movable seats 420 are spaced apart in the first direction X; furthermore, the space on both sides of the mounting base 42 in the first direction X is fully utilized, achieving improved space utilization and a more compact structure.

[0102] Furthermore, both correction feeding assemblies 41 also include a correction drive 419 and a connecting block. The correction drive 419 is mounted on the mounting base 42, and the drive end of the correction drive 419 is connected to the correction movable seat 410 through the connecting block, so that the correction drive 419 can drive the correction movable seat 410 to move along the second direction Y through the connecting block to realize the correction action.

[0103] The mounting base 42 has a third side c3 and a fourth side c4 that are opposite to each other in the third direction Z. Two web guiding drives 419 are located on the third side c3 of the mounting base 42, and the fixed roller 4110 and movable roller 4112 of the two feed rollers 411 are located on the fourth side c4 of the mounting base 42. The third direction Z is perpendicular to both the first direction X and the second direction Y. By arranging the web guiding drives 419 and the fixed rollers 4110 and movable rollers 4112 of the two feed rollers 411 on the third side c3 and fourth side c4 of the mounting base 42 in the third direction Z, respectively, and connecting them via connecting blocks, the web guiding drives 419 are prevented from interfering with the material strip at the fixed rollers 4110 and movable rollers 4112. Furthermore, the space on both sides of the mounting base 42 in the third direction Z is fully utilized, improving space utilization and resulting in a more compact structure.

[0104] Furthermore, the rotation drive 413 of both correction feeding assemblies 41 is disposed on the same side of the mounting base 42 in the first direction X. Thus, by disposing the two rotation drive 413 on the same side of the mounting base 42 in the first direction X, it is convenient to fix the mounting base 42 on the other side of the first direction X (e.g., fix it to the base described below), thereby making full use of the space on both sides of the mounting base 42 in the first direction X, improving space utilization, and making the structure more compact.

[0105] Please see Figure 9 and Figure 10As shown, in an embodiment of the present invention, the clamping mechanism 10 includes a clamping mounting frame 11 and two clamping rollers 12 rotatably connected to the clamping mounting frame 11. The clamping mounting frame 11 can be controlled to move closer to or away from the feeding mechanism 40. A clamping channel (not shown) is formed between the two clamping rollers 12 for each strip to pass through. One of the two clamping rollers 12 can move closer to or away from the other to clamp or release each passing strip. Thus, when it is necessary to clamp each strip, the clamping mounting frame 11 is controlled to move closer to the feeding mechanism 40 along the first direction X and gradually accelerates until the moving speed of the clamping mounting frame 11 is the same as the conveying speed of each strip (i.e., the clamping mounting frame 11 and each strip are relatively stationary). At this time, the two clamping rollers 12 are controlled to move closer to each other to clamp each strip, thereby achieving the clamping of the strip without stopping the strip conveying. It is understandable that the two clamping rollers 12 are arranged opposite each other along a third direction Z, which is perpendicular to both the first direction X and the second direction Y. Specifically... Figure 9 In the embodiment shown, the first direction X is the up-down direction, the second direction Y is the direction perpendicular to the paper, and the third direction Z is the left-right direction.

[0106] In a specific embodiment, the clamping mechanism 10 further includes two clamping plates 17 disposed opposite to each other on the clamping mounting frame 11. These two clamping plates 17 are located downstream of the clamping channel and are used to clamp each strip of material output from the clamping channel. Thus, by using the two clamping plates 17 to clamp each strip of material exiting the clamping channel, as the clamping mounting frame 11 moves closer to the feeding mechanism 40, the two clamping plates 17 can pass through the cutting mechanism 20 to reach the feeding mechanism 40. That is, the cut end of the strip is guided through the cutting mechanism 20 and the various compensation channels of the compensation mechanism 30 to reach the feeding mechanism 40, thereby avoiding the phenomenon that the cut end of the strip is too long to accurately pass through the cutting mechanism 20 and enter the feeding mechanism 40.

[0107] In a specific embodiment, the clamping mechanism 10 further includes a fixed clamping roller bracket 15, a movable clamping roller bracket 16, and a clamping drive member 19. The fixed clamping roller bracket 15 is fixedly connected to the clamping mounting frame 11, and the movable clamping roller bracket 16 is movably connected to the clamping mounting frame 11. The clamping drive member 19 is disposed on the clamping mounting frame 11 and is drivenly connected to the movable clamping roller bracket 16 to drive the movable clamping roller bracket 16 to move closer to or away from the fixed clamping roller bracket 15. One clamping roller 12 is rotatably connected to the fixed clamping roller bracket 15, and the other clamping roller 12 is rotatably connected to the movable clamping roller bracket 16. Thus, under the drive of the clamping drive member 19, the movable clamping roller bracket 16 can drive the clamping roller 12 on it to move closer to or away from the clamping roller 12 on the fixed clamping roller bracket 15, thereby causing the two clamping rollers 12 to clamp or release each strip of material. Optionally, the clamping drive member 19 can be a cylinder.

[0108] Furthermore, the clamping mechanism 10 also includes a guide rod 131, a roller bracket 13, a roller 14, and a wedge block 18. The guide rod 131 is slidably connected to the clamping mounting frame 11, and one end of the guide rod 131 is fixedly connected to the movable clamping roller bracket 16, while the other end of the guide rod 131 is fixedly connected to the roller bracket 13. The roller 14 is rotatably connected to the roller bracket 13, and the wedge block 18 is arranged on the moving path of the roller 14 following the clamping mounting frame 11 along the first direction X, so that the clamping mounting frame 11 can drive the roller 14 to engage or disengage with the wedge block 18 during the movement of the clamping mounting frame 11 along the first direction X.

[0109] When the roller 14 abuts against the wedge block 18, under the abutting force applied by the wedge block 18 to the roller 14, the roller 14 drives the movable clamping roller bracket 16 away from the fixed clamping roller bracket 15 via the guide rod 131, causing the two clamping rollers 12 to move away from each other and release the material strips. Thus, when the clamping mounting frame 11 is in the initial position, the roller 14 abuts against the wedge block 18, and the two clamping rollers 12 are in a state of releasing the material strips. At this time, the clamping drive member 19 always applies a driving force to the movable clamping roller bracket 16, causing the movable clamping roller bracket 16 to have a tendency to move towards the fixed clamping roller bracket 15. As the clamping mounting frame 11 moves toward the feeding mechanism 40 along the first direction X, when the roller 14 separates from the wedge block 18 (at this time, the moving speed of the clamping mounting frame 11 is the same as the conveying speed of each strip), the movable clamping roller bracket 16 immediately moves toward the fixed clamping roller bracket 15 under the driving force provided by the clamping drive component 19 until the two clamping rollers 12 clamp each strip.

[0110] Thus, the arrangement of the roller 14 and the wedge block 18 allows the movable clamping roller bracket 16 to move immediately toward the fixed clamping roller bracket 15 when the roller 14 and the wedge block 18 are separated, thereby immediately driving the two clamping rollers 12 to clamp each strip of material, greatly shortening the response time of the two clamping rollers 12 from the released state to the clamping state.

[0111] Furthermore, one of the two clamping plates 17 is fixedly connected to the fixed clamping roller bracket 15, and the other clamping plate 17 is fixedly connected to the movable clamping roller bracket 16. Thus, when the movable clamping roller bracket 16 drives the two clamping rollers 12 to clamp each strip, it also drives the two clamping plates 17 to clamp each strip. When the movable clamping roller bracket 16 drives the two clamping rollers 12 to release each strip, it also drives the two clamping plates 17 to release each strip.

[0112] Please continue reading Figure 1 and Figure 2As shown, in a specific embodiment, the feeding device further includes a base (not shown) and a first drive mechanism 50. The clamping mounting frame 11 is movably connected to the base along the first direction X. The first drive mechanism 50 is disposed on the base and is drivenly connected to the clamping mounting frame 11 to drive the clamping mounting frame 11 to move along the first direction X, so as to feed the cut ends of each strip into the feeding mechanism 40.

[0113] Further, the first drive mechanism 50 includes a first drive member (not shown), a first lead screw (not shown), and a first lead screw nut (not shown). The first lead screw is rotatably connected to the base, and the axis of the first lead screw is parallel to the first direction X. The first drive member is disposed on the base and is drivenly connected to the first lead screw so that the first drive member can drive the first lead screw to rotate. The first lead screw nut is threadedly connected to the first lead screw and fixedly connected to the clamping mounting frame 11, so that the clamping mounting frame 11 moves together with the first lead screw nut. Thus, when the first drive member drives the first lead screw to rotate, the first lead screw drives the first lead screw nut to move along the first direction X, and the first lead screw nut drives the clamping mounting frame 11 to move along the first direction X. Optionally, the first drive member can be a motor.

[0114] Optionally, a guide rail a1 extending longitudinally along the first direction X is provided on the base, and a clamping mounting frame 11 is provided with a clamping slider (not shown in the figure) that slides with the guide rail a1, so that the movement of the clamping mounting frame 11 relative to the base along the first direction X is guided by the movement of the clamping slider along the guide rail a1.

[0115] Please see Figure 11 As shown in the embodiment of the present invention, the cutting mechanism 20 includes a cutting assembly 21 and a cutting drive assembly 22. The cutting assembly 21 includes a cutting mounting frame 210, a fixed cutter 211, a movable cutter holder 212, and a movable cutter 213. The fixed cutter 211 is fixedly connected to the cutting mounting frame 210, and the movable cutter holder 212 is movably connected to the cutting mounting frame 210. The movable cutter 213 is mounted on the movable cutter holder 212, and the movable cutter 213 and the fixed cutter 211 are arranged opposite to each other in the third direction Z, so that a cutting channel (not shown) is formed between the movable cutter 213 and the fixed cutter 211 for each strip of material to pass through. The movable cutter holder 212 is movable in the third direction Z to drive the movable cutter 213 closer to or away from the fixed cutter 211, thereby simultaneously cutting each strip of material passing through the cutting channel. The cutting drive assembly 22 is mounted on the cutting mounting bracket 210 and is drivenly connected to the movable cutter holder 212 to drive the movable cutter holder 212 to move along the third direction Z, thereby the movable cutter holder 212 drives the movable cutter 213 to move closer to or away from the fixed cutter 211 to cut each strip of material in the cutting channel.

[0116] Optionally, the cutting assembly 21 further includes a first guide post 214, which is mounted on the cutting mounting bracket 210 via a guide sleeve, allowing the first guide post 214 to move relative to the cutting mounting bracket 210 in the third direction Z. One end of the first guide post 214 moves with the movable cutter holder 212, thereby guiding the movement of the movable cutter holder 212 relative to the cutting mounting bracket 210 in the third direction Z.

[0117] Specifically, in this embodiment, the cutting drive assembly 22 includes a cam 220, a cutting drive structure (not shown), and a cam groove plate 221. The cam 220 is mounted on the movable cutter holder 212, and the cutting drive structure is disposed on the cutting mounting bracket 210 and drivenly connected to the cam groove plate 221 to drive the cam groove plate 221 to move along a driving direction intersecting the third direction Z. The cam groove plate 221 has a cam groove 2210, the longitudinal extension direction of which is inclined relative to both the driving direction and the third direction Z. The cam 220 passes through the cam groove 2210, so that when the cutting drive structure drives the cam groove plate 221 to move along the driving direction, the cam 220 moves along the cam groove 2210. Under the guidance of the cam groove 2210, the cam 220 drives the movable cutter holder 212 to move along the third direction Z, thereby enabling the movable cutter 213 and the fixed cutter 211 to cooperate in completing the cutting action. Optionally, the third direction Z, the driving direction, and the first direction X are mutually perpendicular, with the third direction Z perpendicular to the material strip and the driving direction parallel to the width direction of the material strip (the driving direction is the aforementioned second direction Y). Specifically... Figure 11 In the embodiment shown, the driving direction is left and right, the third direction Z is up and down, and the first direction X is perpendicular to the paper.

[0118] Furthermore, the cutting drive structure includes a cutting lead screw 222, a cutting drive component 223, and a cutting lead screw nut 224. The cutting lead screw 222 is rotatably connected to the cutting mounting bracket 210, and the axis of the cutting lead screw 222 is parallel to the driving direction. The cutting drive component 223 is disposed on the cutting mounting bracket 210 and is drivenly connected to the cutting lead screw 222 to drive the cutting lead screw 222 to rotate. The cutting lead screw nut 224 is threadedly connected to the cutting lead screw 222 and fixedly connected to the cam groove plate 221, so that the cutting lead screw nut 224 and the cam groove plate 221 move synchronously. Thus, when cutting is required, the cutting drive 223 drives the cutting screw 222 to rotate, thereby causing the cutting screw nut 224 to move along the axial direction (i.e., the driving direction) of the cutting screw 222. The cutting screw nut 224 drives the cam groove plate 221 to move together along the driving direction. Then, under the guidance of the cam groove 2210, the cam 220 drives the movable cutter holder 212 to move along the third direction Z, so that the movable cutter 213 and the fixed cutter 211 cooperate to complete the cutting action. Optionally, the cutting drive 223 can be a motor.

[0119] In a specific embodiment, the cutting assembly 21 further includes a second guide post 215, a pressure block 216, and a pressure elastic element 217. The second guide post 215 is movably connected to the movable cutter holder 212 along the third direction Z. The pressure block 216 is fixedly connected to the second guide post 215, and the pressure elastic element 217 abuts against the pressure block 216 and the movable cutter holder 212. Thus, as the movable cutter holder 212 moves the movable cutter 213 and the pressure block 216 toward the fixed cutter 211 along the third direction Z, the pressure block 216 first presses each strip of material onto the cutting mounting frame 210 under the elastic force provided by the pressure elastic element 217, and then the movable cutter 213, in conjunction with the fixed cutter 211, cuts each strip of material. That is, the pressure block 216 presses each strip of material before cutting it, thereby improving the cutting quality. Optionally, the pressure elastic element 217 can be a spring.

[0120] Specifically, in this embodiment, the cutting mounting bracket 210 can be controlled to move closer to or further away from the feeding mechanism 40 along the first direction X. Thus, during the actual winding operation, each strip sequentially passes through the clamping mechanism 10, the cutting mechanism 20, the compensation mechanism 30, and the feeding mechanism 40, and enters the winding needle. The winding needle rotates to wind each strip individually, meaning that at least two strips are wound onto the winding needle to form at least two battery cells.

[0121] When the individual cells on the winding needle are almost finished, a finishing operation is required: First, the clamping mounting frame 11 is controlled to move closer to the feeding mechanism 40 along the first direction X, and gradually accelerates until the moving speed of the clamping mounting frame 11 is the same as the conveying speed of each strip (i.e., the clamping mounting frame 11 and each strip are relatively stationary). At this time, the roller 14 separates from the wedge block 18, causing the movable clamping roller bracket 16 to move towards the fixed clamping roller bracket 15 under the driving force provided by the clamping drive member 19, until both clamping rollers 12 and both clamping plates 17 clamp each strip. At the same time, the cutting mounting frame 210 is controlled to move along the first direction X towards the feeding mechanism 40, and gradually accelerates until the cutting mounting frame 210 and each strip are the same as the conveying speed of each strip (i.e., the cutting mounting frame 210 and each strip are relatively stationary). At this time, driven by the cutting drive member 223, the movable cutter 213 and the fixed cutter 211 cooperate to cut each strip along the way. Then, the winding needle continues to wind until all the cut strip is wound, at which point the finishing operation is complete.

[0122] When rewinding, a feeding operation is required: First, the clamping mechanism 10 continues to move closer to the feeding mechanism 40 along the first direction X to guide the cut ends of each strip through the compensation channels of the cutting mechanism 20 and the compensation mechanism 30, and then into the feeding rollers 411 of the feeding mechanism 40. The cut ends of each strip are clamped by the fixed roller 4110 and the movable roller 4112 of the corresponding feeding roller 411. Then, the clamping drive 19 drives the two clamping rollers 12 and the two clamping plates 17 to release each strip, and controls the clamping mounting frame 11 and the cutting mounting frame 210 to return to their respective initial positions. The feeding rollers 411 of the feeding mechanism 40 feed each strip onto a new winding needle, which rotates to wind each strip and completes the winding according to the above steps.

[0123] Please see Figure 1 and Figure 2 As shown, the feeding device further includes a second drive mechanism 60, and the cutting mounting frame 210 is movably connected to the base along the first direction X. The second drive mechanism 60 is disposed on the base and is drivenly connected to the cutting mounting frame 210 to drive the cutting mounting frame 210 to move along the first direction X.

[0124] Further, the second drive mechanism 60 includes a second drive member (not shown), a second lead screw (not shown), and a second lead screw nut (not shown). The second lead screw is rotatably connected to the base, and its axial direction is parallel to the first direction X. The second drive member is disposed on the base and drivenly connected to the second lead screw, enabling it to drive the second lead screw to rotate. The second lead screw nut is threadedly connected to the second lead screw and fixedly connected to the cutting mounting bracket 210, allowing the cutting mounting bracket 210 to move together with the second lead screw nut. Thus, when the second drive member drives the second lead screw to rotate, the second lead screw drives the second lead screw nut to move along the first direction X, and the second lead screw nut drives the cutting mounting bracket 210 to move along the first direction X. Optionally, the second drive member can be a motor.

[0125] Optionally, the cutting mounting bracket 210 is provided with a cutting slider (not shown) that slides in cooperation with the guide rail a1, thereby guiding the movement of the cutting mounting bracket 210 relative to the base in the first direction X by the movement of the cutting slider along the guide rail a1.

[0126] Based on the above-described feeding device, the present invention also provides a winding apparatus. This winding apparatus includes the feeding device as described in any of the above embodiments. Specifically, the winding apparatus further includes a winding device having a winding needle for winding. The feeding device feeds the cut ends of at least two strips into the winding needle, which rotates to wind each strip, thereby simultaneously winding at least two battery cells.

[0127] Based on the above-described winding equipment, the present invention also provides a winding method using the winding equipment described in any of the above embodiments. Please refer to [link to previous text]. Figure 12 As shown, the winding method includes the following steps:

[0128] S10, Winding step;

[0129] S20, Material strip finishing steps;

[0130] S30, Feeding steps;

[0131] S40. Repeat steps S10 to S30 in sequence.

[0132] Specifically, in this embodiment, step S10 includes: the at least two strips sequentially pass through the clamping mechanism 10, the cutting mechanism 20, the compensation channel of the corresponding compensation component 32, and the feed roller 411 of the corresponding correction feeding component 41, and arrive at the winding needle. The winding needle is controlled to rotate, thereby simultaneously winding the at least two strips onto the winding needle to simultaneously form at least two battery cells, until the at least two battery cells are about to be wound. That is, in the at least two strips, each strip is wound to form one battery cell. For example, when there are two strips, two battery cells are simultaneously wound onto the winding needle.

[0133] Please see Figure 13 As shown, in a specific embodiment, step S20 specifically includes the following steps:

[0134] S21. The wrapping length of the strip contained in each cell on the winding needle is detected. The cell whose wrapping length of the strip is less than a preset length is the cell to be compensated. Optionally, the cell with the longest wrapping length of the strip contained in the cells is the standard cell, and the preset length is the wrapping length of the strip contained in the standard cell.

[0135] S22. The force-applying part of the compensation component 32 corresponding to the battery cell to be compensated is controlled to apply a force to the passing strip, thereby increasing the length of the strip located in the compensation channel to compensate for the winding length of the strip of the battery cell to be compensated. Further, the movable roller 323 of the compensation component 32 corresponding to the battery cell to be compensated is controlled to gradually enter the space between the two fixed rollers 321, thereby driving the passing strip to pass around the first fixed roller 321, the movable roller 323 and the second fixed roller 321 in an "S" shape, thereby increasing the length of the corresponding strip located in the compensation channel. It can be understood that when the movable roller 323 of the compensation component 32 corresponding to the battery cell to be compensated is adjusted to the correct position, the sum of the winding length of the strip contained in the battery cell to be compensated and the strip length from the battery cell to the cutting mechanism 20 is L1, and the sum of the winding length of the strip contained in the battery cell that does not need compensation and the strip length from the battery cell to the cutting mechanism 20 is L2, and L1 is approximately equal to L2.

[0136] S25. The cutting mechanism 20 cuts each of the passing material strips at the same time. At this time, the winding needle continues to rotate until the end of the cut material strip (i.e. the material strip between the winding needle and the cutting mechanism 20) is completely wound onto the winding needle, and the finishing is completed.

[0137] Furthermore, the following steps are included between step S22 and step S25:

[0138] S23. Control the clamping mechanism 10 and the cutting mechanism 20 to move closer to the feeding mechanism 40 in the first direction and accelerate until the moving speed of the clamping mechanism 10 and the cutting mechanism 20 is equal to the conveying speed of each material belt.

[0139] S24, The clamping mechanism 10 simultaneously clamps each passing material strip.

[0140] Please see Figure 14 As shown, in a specific embodiment, step S30 specifically includes:

[0141] S31, the cutting mechanism 20 stops moving. The clamping mechanism 10 continues to move, thereby driving the cut ends of each strip to pass through the cutting mechanism 20 and the compensation channels of the compensation mechanism 30 in sequence, until they reach the feeding components 41 of the feeding mechanism 40, so that the feeding rollers 411 of each feeding component 41 clamp the cut ends of the corresponding strips.

[0142] S32, the clamping mechanism 10 simultaneously releases each strip of material, and both the clamping mechanism 10 and the cutting mechanism 20 move away from the feeding mechanism 40 along the first direction X until they return to their initial positions.

[0143] S33. Control the correction seat 410 of each correction feeding component 41 to move along the second direction Y, so as to correct the deviation of each strip in the second direction Y.

[0144] S34. Each feed roller 411 feeds the cut end of the material strip it is holding into the winding needle, and then releases the grip on the material strip (i.e., loosens the material strip).

[0145] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0146] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A feeding device, arranged upstream of a winding needle, the winding needle being used to wind at least two strips of material respectively to simultaneously wind and form at least two battery cells, characterized in that, The feeding device includes: A cutting mechanism capable of simultaneously and controllably cutting the at least two material strips in transit; and A compensation mechanism is arranged between the cutting mechanism and the winding needle. The compensation mechanism includes at least two compensation components corresponding one-to-one with the at least two strips. Each compensation component has a compensation channel through which the corresponding strip passes and a force-applying part that applies a force to the strip passing through the compensation channel. Under the action of the force, the strip passing through the compensation channel changes its conveying path and increases the length of the strip located in the compensation channel to compensate for the winding length of the strip contained in the corresponding battery cell.

2. The feeding device according to claim 1, characterized in that, Each of the compensation components includes a plurality of guide rollers arranged along the compensation channel, a portion of which is located on one side of the material belt and another portion is located on the opposite side of the material belt; at least one of the plurality of guide rollers can be controlled to move toward the material belt as a force-applying part to change the conveying path of the material belt.

3. The feeding device according to claim 2, characterized in that, The plurality of guide rollers includes at least two fixed guide rollers and a movable guide roller. The two fixed guide rollers are located on the same side of the material belt, and the movable guide roller is located on the opposite side of the material belt. The movable guide roller can be controlled to enter the space between the two fixed guide rollers to act as the force-applying part and drive the material belt to change its conveying path.

4. The feeding device according to claim 3, characterized in that, The compensation mechanism further includes a compensation mounting frame, and each compensation component further includes a compensation movable bracket; Each of the two fixed rollers of the compensation assembly is rotatably connected to the compensation mounting frame, the movable compensation bracket is controllably movable and connected to the compensation mounting frame, and the movable roller is rotatably connected to the movable compensation bracket.

5. The feeding device according to claim 4, characterized in that, Each of the compensation components further includes a compensation drive structure and a drive block, the compensation mounting bracket has a fifth side and a sixth side that are opposite to each other in a first direction, and the compensation mounting bracket also has a clearance groove that passes through the fifth side and the sixth side; The compensation drive structure is located on the fifth side, and the compensation movable bracket is located on the sixth side; The drive block passes through the clearance groove, and one end of the drive block is driven to the compensation drive structure, while the other end of the drive block is connected to the compensation movable bracket.

6. The feeding device according to claim 1, characterized in that, The compensation mechanism also includes a compensation mounting frame, on which each of the compensation components is mounted; The compensation mounting bracket can be moved in a controlled manner toward or away from the cutting mechanism.

7. The feeding device according to any one of claims 1 to 6, characterized in that, The at least two material strips are both conveyed along a first direction and are spaced apart along a second direction perpendicular to the first direction; the feeding device further includes a feeding mechanism arranged between the compensation mechanism and the winding needle, the feeding mechanism including at least two correction feeding components corresponding one-to-one with the at least two material strips, each correction feeding component including: The correction seat can be controlled to move along the second direction; and Feed rollers, mounted on the corrective movable seat, are used to convey the corresponding material strip downstream to the winding needle; In the first direction, the feed rollers of each of the correction feeding components are arranged at intervals; in the second direction, the feed rollers of each of the correction feeding components are arranged at intervals.

8. A winding device, characterized in that, It includes a winding device and a feeding device as described in any one of claims 1 to 7, wherein the winding device has the winding needle that can be rotated in a controlled manner.

9. A winding method using the winding equipment as described in claim 8, characterized in that, This includes the sequentially executed winding and strip finishing steps; The winding step includes: the at least two strips sequentially pass through the compensation channels of the cutting mechanism and the corresponding compensation components, and arrive at the winding needle; the winding needle rotates to wind the at least two strips onto the winding needle respectively, so as to simultaneously wind and form at least two battery cells; The strip finishing step includes: a. The winding length of the strip contained in each cell on the winding needle is detected respectively, and the cell whose winding length of the strip is less than the preset length is the cell to be compensated. b. Control the force-applying part of the compensation component corresponding to the battery cell to be compensated to apply a force to the material strip passing through, thereby increasing the length of the material strip located in the compensation channel; c. The cutting mechanism cuts each of the passing material strips simultaneously, so that all the cut material strips are wound onto the winding needle.

10. The winding method of the winding equipment according to claim 9, characterized in that, In step a: the battery cell with the longest strip winding length among all battery cells is the standard battery cell, and the preset length is the strip winding length contained in the standard battery cell.

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