Winding device

Abstract

The winding equipment comprises an unwinding device, a winding device and a winding device, the winding device is configured to have a non-circular cross section in the axial direction perpendicular to the winding shaft; and each set of speed adjusting device comprises at least two cache mechanisms, and the at least two cache mechanisms are used for adjusting the speed of the to-be-wound material belt conveyed to the winding device, so that the speed of the to-be-wound material belt conveyed to the winding device is matched with the target winding speed. By implementing the embodiment of the invention, the situation that the requirements on the speed and the acceleration of the winding device are too high can be avoided, the normal operation of the winding equipment under the condition that the unwinding speed is relatively high is ensured, and the winding efficiency of the winding equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a winding device. Background Art

[0002] The winding process is a key process in the production process of square batteries, which directly affects the battery quality of square batteries. In the winding equipment for square batteries, the winding device is usually an irregular shape, such as a diamond-shaped winding needle. In order to coordinate the speed of the unwinding device and the winding device, the winding device can use an electronic cam to control the variable speed operation of the winding device according to the shape characteristics of the winding device to ensure the constant linear speed of the unwinding device. However, when the constant linear speed set for the unwinding device is high, the winding device needs to reach extremely high speed and acceleration peaks at a specific moment, and the drive motor of the winding device may not be able to provide a matching driving force. Utility Model Content

[0003] The embodiment of the present application discloses a winding device, which can avoid the situation where the speed and acceleration requirements of the winding device are too high, ensure the normal operation of the winding device under the condition of high unwinding speed, and improve the winding efficiency of the winding device.

[0004] The present application embodiment discloses a winding device, comprising:

[0005] An unwinding device, used for unwinding the material strip to be wound at a preset unwinding speed;

[0006] A winding device, wherein the winding device is configured to have a non-circular cross-section in an axial direction perpendicular to the winding axis, and the winding device is used to wind the material strip to be wound according to a target winding speed corresponding to the preset unwinding speed;

[0007] At least one set of speed adjustment device, each set of speed adjustment device includes at least two cache mechanisms, among the at least two cache mechanisms, compared with the first cache mechanism arranged close to the winding device, the second cache mechanism is arranged closer to the unwinding device, and the at least two cache mechanisms are used to adjust the speed at which the material tape to be wound is transmitted to the winding device, so that the speed at which the material tape to be wound is transmitted to the winding device matches the target winding speed.

[0008] In one embodiment, the at least two buffer mechanisms are used to buffer the material tape to be wound to reduce the speed at which the material tape to be wound is transferred to the winding device, or to output the buffered material tape to be wound to speed up the speed at which the material tape to be wound is transferred to the winding device.

[0009] In one embodiment, the first cache mechanism includes a first driving member and a first swinging rod, and the second cache mechanism includes a second swinging rod; the first swinging rod is used to swing under the driving action of the first driving member, and the second swinging rod is used to swing under the tension of the material strip to be wound;

[0010] The winding device also includes an active tension control device, which is arranged between the first cache mechanism and the second cache mechanism, and is used to adjust the tension of the to-be-wound material strip between the first cache mechanism and the second cache mechanism.

[0011] In one embodiment, the first cache mechanism further includes a movable roller, the movable roller is connected to the first swing rod, and the movable roller is used to move linearly with the swing of the first swing rod under the action of the first driving member.

[0012] In one embodiment, the first buffer mechanism further comprises two fixed rollers; the two fixed rollers are respectively arranged at positions opposite to both sides of the linear moving direction of the one movable roller;

[0013] The one movable roller is used to move linearly in a direction away from the two fixed rollers to buffer the material strip to be wound between the two fixed rollers, or to move linearly in a direction close to the two fixed rollers to output the material strip to be wound buffered between the two fixed rollers.

[0014] In one embodiment, the second cache mechanism also includes two movable rollers and two fixed rollers, the two movable rollers are respectively connected to the two ends of the second swing rod, the two movable rollers are used to move linearly under the swinging action of the second swing rod to adjust the tension of the material strip to be wound unwound by the unwinding device, and the two fixed rollers are respectively located at relative positions on both sides of the linear movement direction of the two movable rollers.

[0015] In one embodiment, the second cache mechanism further includes a reset member, which is connected to the second swing rod and is used to provide a force to reset the second swing rod.

[0016] In one embodiment, the active tension control device includes a second driving member and a fixed roller, the second driving member is connected to the fixed roller, and the second driving member is used to control the rotation of the fixed roller to adjust the tension of the material strip to be wound between the first cache mechanism and the second cache mechanism.

[0017] In one embodiment, the unwinding device includes an unwinding device for the first diaphragm, an unwinding device for the second diaphragm, an unwinding device for the battery cathode material strip, and an unwinding device for the battery anode material strip; each of the unwinding devices is correspondingly configured with a set of the speed adjustment device.

[0018] In one embodiment, the winding device also includes a film combining device, which is arranged between each set of the speed adjustment device and the winding device, and is used to bring the first diaphragm, the second diaphragm, the battery cell cathode material strip and the battery cell anode material strip together for transmission to the winding device.

[0019] The winding device disclosed in the embodiment of the present application includes a unwinding device, a winding device and at least one set of speed adjustment devices. The unwinding device can unwind the material tape to be wound according to a preset unwinding speed. The winding device is configured to have a non-circular cross section in the axial direction perpendicular to the winding axis. The winding device can wind the material tape to be wound according to a target winding speed corresponding to the preset unwinding speed. Each set of speed adjustment devices includes at least two cache mechanisms. Among the at least two cache mechanisms, the second cache mechanism is closer to the unwinding device than the first cache mechanism arranged near the winding device. The at least two cache mechanisms are used to adjust the speed at which the material tape to be wound is transmitted to the winding device, so that the speed at which the material tape to be wound is transmitted to the winding device matches the target winding speed. By adjusting the speed at which the material tape to be wound is transmitted to the winding device by the speed adjustment device, when the unwinding device is at a constant preset unwinding speed, it is possible to avoid excessive speed fluctuations caused by the target winding speed not matching the preset winding speed, thereby affecting the winding process. Even if the unwinding speed is high, the winding device can operate normally, thereby improving the winding efficiency of the winding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a winding device disclosed in an embodiment of the present application;

[0022] Figure 2 It is another structural schematic diagram of the winding device disclosed in the embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of a first swing lever mechanism disclosed in an embodiment of the present application;

[0024] Figure 4is a structural schematic diagram of a second swing rod mechanism disclosed in an embodiment of the present application;

[0025] Figure 5 It is another structural schematic diagram of the winding device disclosed in the embodiment of the present application;

[0026] Figure 6 It is another structural schematic diagram of the winding device disclosed in the embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that the terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first swing lever may be referred to as a second swing lever, and similarly, a second swing lever may be referred to as a first swing lever.

[0030] The first swing arm and the second swing arm are both swing arms, but they are not the same swing arm.

[0031] The embodiment of the present application discloses a winding device, which can avoid the situation where the speed and acceleration of the winding device are too high, ensure the normal operation of the winding device under the condition of high unwinding speed, and improve the winding efficiency of the winding device.

[0032] The following will be described in detail with reference to the accompanying drawings. For ease of understanding, in the following drawings, the arrows point to indicate the transmission direction of the material strip to be wound.

[0033] like Figure 1 As shown, Figure 11 is a schematic diagram of a winding device disclosed in an embodiment of the present application, wherein the electronic device comprises an unwinding device 110, at least one set of speed adjustment devices 120 and a rewinding device 130. The speed adjustment device 120 is disposed between the unwinding device 110 and the rewinding device 130.

[0034] The unwinding device 110 is used to unwind the material strip to be wound according to a preset unwinding speed.

[0035] The winding device 130 is configured to have a non-circular cross section in an axial direction perpendicular to the winding axis, and the winding device 130 is used to wind the winding material strip according to a target winding speed corresponding to a preset unwinding speed;

[0036] Each set of speed adjustment device 120 includes at least two cache mechanisms. Among the at least two cache mechanisms, compared with the first cache mechanism arranged close to the winding device 130, the second cache mechanism is arranged closer to the unwinding device 110. The at least two cache mechanisms are used to adjust the speed at which the material tape to be wound is transmitted to the winding device, so that the speed at which the material tape to be wound is transmitted to the winding device matches the target winding speed.

[0037] The winding device 130 can unwind the material strip to be wound at a preset unwinding speed, and the material strip to be wound can include but is not limited to electrode membranes, diaphragms, etc. Optionally, the preset unwinding speed can be a constant speed, which can be configured according to actual needs in the production process.

[0038] like Figure 1 As shown by the direction arrow in the figure, the material strip to be wound unwound by the unwinding device 110 can first reach the speed adjustment device 120, and then the speed adjustment device 120 transmits the material strip to be wound to the winding device 130, and the winding device 130 winds it.

[0039] The winding device 130 can rotate around the winding shaft to wind the material strip to be wound. The winding device 130 can be configured to have a non-circular cross section in the axial direction perpendicular to the winding shaft. In some embodiments, the winding device 130 can include a winding needle, which can be a non-circular winding needle, such as a diamond-shaped winding needle, an elliptical winding needle, etc. For example, the cross section in the axial direction perpendicular to the winding shaft can refer to Figure 1 The shape of the winding device 130 in the figure is an example of a cross-section of a rhombus-shaped winding needle in an axial direction perpendicular to the winding axis.

[0040] The winding device 130 can rotate in a clockwise direction or a counterclockwise direction perpendicular to the winding axis of the cross section to wind the material strip to be wound. Figure 1The rotating arrow in the figure indicates that the winding device 130 can rotate counterclockwise in a winding axis perpendicular to the cross section. Since the preset unwinding speed of the unwinding device 110 needs to be matched, the winding device 130 can wind the winding material strip according to the target winding speed corresponding to the preset unwinding speed, but the target winding speed and the preset unwinding speed may be different, and the difference between the two can be compensated by the speed adjustment device 120.

[0041] The speed adjustment device 120 includes at least two buffer mechanisms that can buffer the material tape to be wound to reduce the speed at which the material tape to be wound is transmitted to the winding device 130, or output the buffered material tape to be wound to speed up the speed at which the material tape to be wound is transmitted to the winding device 130, so that the speed at which the material tape to be wound is transmitted to the winding device 130 matches the target winding speed. Due to the irregular shape and limited driving force of the winding device 130, when the target winding speed is less than the preset unwinding speed, the speed adjustment device 120 can buffer the material tape to be wound to compensate for the speed difference between the target winding speed and the preset unwinding speed. When the target winding speed is greater than the preset unwinding speed, the speed adjustment device 120 can output the buffered material tape to be wound to compensate for the speed difference between the preset unwinding speed and the target winding speed, thereby avoiding speed fluctuations and tension fluctuations of the material tape to be wound, and ensuring the winding quality.

[0042] like Figure 2 As shown, Figure 2 is another structural schematic diagram of the winding device disclosed in the embodiment of the present application, wherein the speed adjustment device 120 may include a first cache mechanism 210 and a second cache mechanism 220, the second cache mechanism 220 may be arranged between the unwinding device 110 and the first cache mechanism 210, the first cache mechanism 210 may be arranged between the second cache mechanism 220 and the winding device 130, that is, the first cache mechanism 210 is closer to the winding device 130, and the second cache mechanism 220 is closer to the unwinding device 110, such as Figure 2 As shown by the direction arrows in the figure, the material strip to be wound unwound by the unwinding device 110 can first reach the second buffer mechanism 220, then reach the first buffer mechanism 210, and finally reach the winding device 130 for winding.

[0043] The first buffer mechanism 210 may include a first driving member 211 and a first swinging rod 212, wherein the first driving member 211 may include a motor, and the second buffer mechanism 220 may include a second swinging rod 221, wherein the first swinging rod 212 is used to swing under the driving action of the first driving member 211 to change the buffer amount of the to-be-wound tape in the first buffer mechanism 210, thereby adjusting the speed at which the to-be-wound tape is transmitted to the winding device 130. The second swinging rod 221 may be used to swing under the tension of the to-be-wound tape to change the buffer amount of the to-be-wound tape in the second buffer mechanism 220, thereby releasing the tension of the to-be-wound tape unwound by the unwinding device 110.

[0044] like Figure 3 As shown, Figure 3 : is a schematic diagram of the structure of the first cache mechanism disclosed in the embodiment of the present application. The first cache mechanism 210 also includes a movable roller 310, which can be connected to the first swing rod 212. The movable roller 310 can be used to move linearly with the first swing rod 212 under the action of the first driving member 211. The first swing rod 212 can swing under the drive of the first driving member 211, driving the movable roller 310 to move linearly, so as to change the cache amount of the to-be-wound material strip in the first cache mechanism 210, so that the speed at which the to-be-wound material strip is transmitted to the winding device 130 matches the target winding speed. Optionally, the linear movement direction can be Figure 3 Horizontal direction in .

[0045] For example Figure 3 As shown, the first buffer mechanism 210 further includes two fixed rollers 320, which are respectively arranged at relative positions on both sides of the linear moving direction of a movable roller 310. One of the fixed rollers 320 can receive the material tape to be wound transmitted from the second swing rod 221, and transmit the material tape to be wound to one movable roller 310, one movable roller 310 can receive the material tape to be wound transmitted from one of the fixed rollers 320, and transmit the material tape to be wound to the other fixed roller 320, and the other fixed roller 320 can receive the material tape to be wound transmitted from one movable roller 310, and transmit the material tape to be wound to the winding device 130.

[0046] Among them, a movable roller 310 can be used to move linearly in a direction away from the two fixed rollers 320 to cache the material strip to be wound between the two fixed rollers 320, or to move linearly in a direction close to the two fixed rollers 320 to output the material strip to be wound cached between the two fixed rollers 320. Among them, a movable roller 310 can move linearly in a direction close to or away from the two fixed rollers 320 under the swinging action of the first swing rod 212. Specifically, since the axis connecting the centers of the two fixed rollers 320 can form an angle with the linear motion direction of a movable roller 310, when a movable roller 310 moves, the length of the material strip to be wound between the two fixed rollers 320 changes, that is, the cache amount of the material strip to be wound in the first cache mechanism 210 is changed to compensate for the material strip length difference caused by the speed difference between the target winding speed and the preset unwinding speed, so that the speed of the material strip to be wound to be transmitted to the winding device 130 can be adjusted, so that the speed of the material strip to be wound to be transmitted to the winding device 130 matches the target winding speed.

[0047] Optionally, two fixed rollers 320 may be arranged on one side of a movable roller 310 close to the winding device 130, and the center line of the roller axes of the two fixed rollers 320 may be perpendicular to the linear motion direction of the first movable roller 310. The material tape to be wound transmitted from the second swing rod 221 is first transmitted to the movable roller 310 by self-rotation of one of the fixed rollers 320, and the other fixed roller 320 is used to receive the material tape to be wound transmitted by the movable roller 310. In this way, the first movable roller 310 moves in a direction approaching or away from the first fixed roller 320 under the action of the first swing rod 212, so that in the process of the first movable roller 310 moving closer to or away from the first fixed roller 320, the length of the material tape to be wound between the two fixed rollers 320 changes.

[0048] For example, the first swinging rod 212 can swing to drive a movable roller 310 to move linearly in the first direction, so that the movable roller 310 is away from the two fixed rollers 320, so as to cache the material tape to be wound between the two fixed rollers 320, increase the material tape length of the material tape to be wound between the two fixed rollers 320, and reduce the speed of the material tape to be wound to the winding device 130; the swinging rod 212 can also swing to drive a movable roller 310 to move linearly in the second direction, so that the movable roller 310 is close to the two fixed rollers 320, so as to output the cached material tape to be wound between the two fixed rollers 320, reduce the transmission length of the material tape to be wound between the two fixed rollers 320, and increase the speed of the material tape to be wound to the winding device 130. The first direction and the second direction are opposite directions.

[0049] In one embodiment, Figure 4 As shown, Figure 4It is a structural schematic diagram of the second cache mechanism disclosed in an embodiment of the present application. The second cache mechanism 220 includes two movable rollers 410 and two fixed rollers 420. The two movable rollers 410 are respectively connected to the two ends of the second swing rod 221 so as to move linearly under the swinging action of the second swing rod 221 to adjust the tension of the unwinding device 110 to be wound material strip, and the two fixed rollers 420 are respectively located at relative positions on both sides of the linear movement direction of the two movable rollers 410.

[0050] Exemplarily, a line connecting the roller axis centers of the two fixed rollers 420 forms an angle with a line connecting the roller axis centers of the two movable rollers 410, and the two fixed rollers 420 are arranged roughly corresponding to the swing center of the second swing rod 221. The two fixed rollers 420 and the two movable rollers 410 are arranged in a quadrilateral, so that during the movement of the two movable rollers 410, the cache amount of the material to be wound in the second cache mechanism 220 is changed.

[0051] like Figure 4 As shown by the direction arrows in the figure, one of the movable rollers 410 can receive the material tape to be wound transmitted from the unwinding device 110, so as to be transmitted to one of the fixed rollers 420, one of the fixed rollers 420 can receive the material tape to be wound transmitted from one of the movable rollers 410, so as to be transmitted to the other fixed roller 420, the other fixed roller 420 can receive the material tape to be wound transmitted from one of the fixed rollers 420, so as to be transmitted to the other movable roller 410, and the other movable roller 410 can receive the material tape to be wound transmitted from the other fixed roller 420, so as to be transmitted to the first cache mechanism 210.

[0052] For example Figure 4 As shown, the second cache mechanism 220 further includes a reset member 430, which can be connected to the second swing rod 221. The reset member 430 can include but is not limited to a spring, a motor, a piston, etc. The reset member 430 can provide a force to reset the second swing rod 221, that is, to reset the two movable rollers 410. Optionally, the reset member 430 can provide a force when the second swing rod 221 is not in the target position, so that the second swing rod 221 is reset to the target position.

[0053] It can be understood that the target position is the initial position of the second swinging rod 221 before it swings. Specifically, when winding the material tape to be wound, the second buffer mechanism 220 receives the material tape to be wound unwound from the unwinding device, so that under the tension of the material tape to be wound, the second swinging rod 221 starts to swing, that is, the second swinging rod 221 is not in the target position, and the reset member 430 can provide a force to the second swinging rod 221, and the force can be a fixed size, such as a fixed torque output by a motor, so that the second buffer mechanism 220 is reset.

[0054] like Figure 5 As shown, Figure 5 It is another structural schematic diagram of the winding device disclosed in the embodiment of the present application, and the winding device also includes an active tension control device 510, and the active tension control device 510 is arranged between the first cache mechanism 210 and the second cache mechanism 220. The active tension control device 510 is used to adjust the tension of the to-be-wound material strip between the first cache mechanism 210 and the second cache mechanism 220. The tension control device 510 may include a second drive member and a fixed roller. The second drive member may include a motor. The second drive member may be connected to a fixed roller. The second drive member may be used to control the rotation of the fixed roller to control the tension of the to-be-wound material strip.

[0055] The active tension control device 510 can also detect the transmission acceleration force and / or transmission deceleration force of the plurality of fixed rollers included in the winding device on the material strip to be wound, and determine the compensation force according to the transmission acceleration force and / or transmission deceleration force of the plurality of fixed rollers on the material strip to be wound, so as to output the compensation force to the material strip to be wound to compensate for the movement of the material strip to be wound, so as to control the tension of the material strip to be wound. The plurality of fixed rollers can include all the fixed rollers through which the material strip to be wound passes.

[0056] like Figure 6 As shown, Figure 6 It is another structural schematic diagram of the winding equipment disclosed in the embodiment of the present application, wherein there are multiple unwinding devices 110 and speed adjustment devices 120. Optionally, the multiple unwinding devices 110 may include an unwinding device for the first diaphragm, an unwinding device for the second diaphragm, an unwinding device for the battery cathode material strip, and an unwinding device for the battery anode material strip. Each unwinding device 110 is correspondingly configured with a set of speed adjustment devices 120. The winding equipment also includes a film-joining device 140, which is arranged between each set of speed adjustment devices 120 and the winding device 130. The film-joining device 140 is used to make the to-be-wound material strips transmitted by each set of speed adjustment devices 120 close together to enter the winding device 130, that is, the film-joining device 140 can be used to make the first diaphragm, the second diaphragm, the battery cathode material strip and the battery anode material strip close together to transmit them to the winding device 130.

[0057] The film-joining device 140 may include a first film-joining roller and a second film-joining roller, and a film-joining channel is formed between the first film-joining roller and the second film-joining roller. The material strips to be wound transmitted by each set of speed adjustment devices 120 enter the film-joining channel. The film-joining channel can make the material strips to be wound transmitted by each set of speed adjustment devices 120 close together to enter the winding device 130, so that multiple unwinding devices 110 and multiple sets of speed adjustment devices 120 can cooperate. It should be understood that in Figure 6 The invention also includes a plurality of fixed rollers. The present application does not impose any restriction on whether or not each fixed roller is provided, and does not impose any restriction on the position of each fixed roller, which can be set according to actual conditions.

[0058] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0060] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A winding device, characterized in that: include: An unwinding device, used for unwinding the material strip to be wound at a preset unwinding speed; A winding device, wherein the winding device is configured to have a non-circular cross-section in an axial direction perpendicular to the winding axis, and the winding device is used to wind the material strip to be wound according to a target winding speed corresponding to the preset unwinding speed; At least one set of speed adjustment device, each set of the speed adjustment device includes at least two cache mechanisms, among the at least two cache mechanisms, compared with the first cache mechanism arranged close to the winding device, the second cache mechanism is arranged closer to the unwinding device, and the at least two cache mechanisms are used to adjust the speed at which the material tape to be wound is transmitted to the winding device, so that the speed at which the material tape to be wound is transmitted to the winding device matches the target winding speed.

2. The winding device according to claim 1, characterized in that The at least two buffer mechanisms are used to buffer the material tape to be wound so as to reduce the speed at which the material tape to be wound is transferred to the winding device, or to output the buffered material tape to be wound so as to speed up the speed at which the material tape to be wound is transferred to the winding device.

3. The winding device according to claim 1, characterized in that The first cache mechanism includes a first driving member and a first swinging rod, and the second cache mechanism includes a second swinging rod; the first swinging rod is used to swing under the driving action of the first driving member, and the second swinging rod is used to swing under the tension of the material strip to be wound; The winding device also includes an active tension control device, which is arranged between the first cache mechanism and the second cache mechanism, and is used to adjust the tension of the to-be-wound material strip between the first cache mechanism and the second cache mechanism.

4. The winding device according to claim 3, characterized in that The first cache mechanism further includes a movable roller, which is connected to the first swing rod, and is used for moving linearly along with the swing of the first swing rod under the action of the first driving member.

5. The winding device according to claim 4, characterized in that The first buffer mechanism further comprises two fixed rollers; the two fixed rollers are respectively arranged at relative positions on both sides of the linear moving direction of the one movable roller; The one movable roller is used to move linearly in a direction away from the two fixed rollers to buffer the material strip to be wound between the two fixed rollers, or to move linearly in a direction close to the two fixed rollers to output the material strip to be wound buffered between the two fixed rollers.

6. The winding device according to claim 3, characterized in that The second cache mechanism also includes two movable rollers and two fixed rollers, the two movable rollers are respectively connected to the two ends of the second swing rod, the two movable rollers are used to move linearly under the swinging action of the second swing rod to adjust the tension of the material strip to be wound up by the unwinding device, and the two fixed rollers are respectively located at relative positions on both sides of the linear movement direction of the two movable rollers.

7. The winding device according to claim 6, characterized in that The second cache mechanism also includes a reset member, which is connected to the second swing rod and is used to provide a force to reset the second swing rod.

8. The winding device according to claim 3, characterized in that The active tension control device includes a second driving member and a fixed roller, the second driving member is connected to the fixed roller, and the second driving member is used to control the rotation of the fixed roller to adjust the tension of the material strip to be wound between the first cache mechanism and the second cache mechanism.

9. The winding device according to claim 1, characterized in that The unwinding device includes an unwinding device for the first diaphragm, an unwinding device for the second diaphragm, an unwinding device for the battery cathode material strip, and an unwinding device for the battery anode material strip; each of the unwinding devices is correspondingly configured with a set of the speed adjustment device.

10. The winding device according to claim 9, characterized in that The winding equipment also includes a film-joining device, which is arranged between each set of the speed adjustment device and the winding device, and is used to bring the first diaphragm, the second diaphragm, the battery cell cathode material strip and the battery cell anode material strip together for transmission to the winding device.

Images