A winding device

Abstract

The present invention relates to a winding device. The winding device comprises: a winding mechanism, comprising a winding needle for winding a material strip, the winding needle having a slit and a clamping surface as a side wall of the slit; a moving part, which can be controlled to approach or move away from the winding needle; a cutting and pushing mechanism, which is arranged on the moving part; and a clamping mechanism, comprising a clamping assembly and a trigger assembly, the clamping assembly comprising a clamping block and a first elastic member, the clamping block being arranged on the winding needle and capable of approaching or moving away from the clamping surface relative to the winding needle; the first elastic member being connected between the clamping block and the winding needle; wherein, when the moving part approaches the winding needle, the cutting and pushing mechanism presses the material strip against the winding needle and cuts the material strip pressed against the winding needle, the trigger assembly pushes the clamping block away from the clamping surface, and the cutting and pushing mechanism also pushes the upstream cut end of the material strip toward the slit of the winding needle, so that the upstream cut end of the material strip enters between the clamping block and the clamping surface.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular to a winding device. Background Art

[0002] The battery cell is an important component of the battery, and is made by winding each layer of material strip (such as the four layers of material strips of diaphragm, anode plate, diaphragm and cathode plate).

[0003] In the prior art, each layer of material strip is brought together by a film-joining mechanism before being wound on a winding needle located in the first station. After the winding needle in the first station winds one battery cell, it switches to the second station, and the other winding needle switches to the first station. At this point, in order for the winding needle in the first station to be able to wind the next battery cell, the layers of material strip passing through the first station must be cut, and the upstream cut ends of each layer of material strip must be vacuum-attached to the winding needle in the first station. However, the vacuum-attached method used by the winding needle to secure the upstream cut ends of the material strip is not strong enough, and the upstream cut ends of the material strip can easily separate from the winding needle, making winding impossible. Summary of the Invention

[0004] Based on this, it is necessary to provide a winding device that improves the above defects in order to address the problem that the upstream cut end of the material strip is not firmly fixed by the vacuum adsorption method of the winding needle in the existing technology, and the upstream cut end of the material strip is easily separated from the winding needle and cannot be wound.

[0005] A winding device comprising:

[0006] A winding mechanism, comprising a winding needle for winding the material strip, the winding needle having a clamping gap and a clamping surface serving as a side wall of the clamping gap;

[0007] a moving part, which can be controlled to move closer to or away from the winding needle;

[0008] A cutting and pushing mechanism is provided on the moving component; and

[0009] The material clamping mechanism includes a clamping assembly and a trigger assembly provided on the moving component. The clamping assembly includes a clamping block and a first elastic member. The clamping block is provided on the winding needle and can move closer to or further away from the clamping surface relative to the winding needle. The first elastic member is connected between the clamping block and the winding needle and is used to provide a preload force that causes the clamping block to have a movement tendency toward the clamping surface.

[0010] Among them, when the moving part approaches the winding needle, the cutting and pushing mechanism presses the material strip against the winding needle and cuts off the material strip pressed against the winding needle, and the trigger component pushes the clamping block away from the clamping surface. The cutting and pushing mechanism also pushes the upstream cut end of the material strip toward the gap of the winding needle, so that the upstream cut end of the material strip enters between the clamping block and the clamping surface.

[0011] In one embodiment, the clamping assembly further comprises an abutment block connected to the clamping block, wherein the abutment block has a first inclined surface;

[0012] When the moving component drives the trigger assembly toward the winding needle, the trigger assembly can abut against the first inclined surface to convert the movement of the trigger assembly into movement of the abutment block and the clamping block away from the clamping surface.

[0013] In one embodiment, the abutment block further has a second inclined surface. When the moving component drives the trigger assembly away from the winding needle, the trigger assembly can abut against the second inclined surface to press the clamping block onto the clamping surface through the abutment block.

[0014] In one embodiment, the first inclined surface and the second inclined surface have an arc transition.

[0015] In one embodiment, the trigger assembly includes a connecting rod and an abutting roller, one end of the connecting rod is mounted on the moving component, and the abutting roller is rotatably connected to the other end of the connecting rod;

[0016] When the moving component drives the connecting rod to approach or move away from the winding needle, the connecting rod drives the abutting roller to abut against the first inclined surface or the second inclined surface.

[0017] In one embodiment, the trigger assembly further includes a support, a second elastic member, and a limit member, wherein the support is mounted on the moving component, an end of the connecting rod away from the abutting roller is hinged to the support, and the second elastic member is connected between the support and the connecting rod to provide a preload force that causes the connecting rod to rotate relative to the support in a preset direction of rotation;

[0018] The limiting member is mounted on the support and abuts against the connecting rod to limit the connecting rod from rotating relative to the support along the preset rotation direction.

[0019] In one embodiment, during the process in which the moving component drives the abutment roller to roll along the second inclined surface through the connecting rod, under the pressure provided by the second inclined surface, the abutment roller drives the connecting rod to rotate relative to the support in a direction opposite to the preset rotation direction.

[0020] In one embodiment, the position of the limiting member relative to the support is adjustable, so that the position of the abutting roller can be adjusted through the connecting rod.

[0021] In one embodiment, the winding needle includes a fixed needle assembly and an outer needle assembly, an inner needle assembly and a push rod assembly all arranged on the fixed needle assembly;

[0022] The outer needle assembly is formed with the clamping slit and the clamping surface. The clamping block is provided on the outer needle assembly and can move toward or away from the clamping surface. The push rod assembly can drive the inner needle assembly to move under the action of an external force.

[0023] The clamping assembly further includes a toggle member connected to the inner needle assembly; when the push rod assembly drives the inner needle assembly to move, the inner needle assembly can drive the toggle member to toggle the clamping block away from the clamping surface.

[0024] In one embodiment, one end of the toggle member is fixedly connected to the inner needle assembly, and the other end of the toggle member is used to toggle the clamping block away from the clamping surface under the drive of the inner needle assembly; or

[0025] The toggle member is hinged to the outer needle assembly, and one end of the toggle member is hinged to the inner needle assembly. The other end of the toggle member is used to toggle the clamping block away from the clamping surface under the drive of the inner needle assembly.

[0026] In one embodiment, the cutting and pushing mechanism includes a rolling assembly, a cutting assembly and a pushing assembly, all of which are arranged on the moving part. The rolling assembly is used to press the material strip onto the winding needle, the cutting assembly is used to cut the material strip from the downstream side of the rolling assembly, and the pushing assembly is used to push the upstream cut end of the material strip into the gap of the winding needle.

[0027] In one embodiment, the winding needle can be controlled to rotate around its own axis, and the moving component can be controlled to rotate around the winding needle.

[0028] In one embodiment, the angular velocity of the winding needle rotating around its own axis is equal to the angular velocity of the moving component rotating around the winding needle.

[0029] In one embodiment, the winding mechanism further includes a turret and at least two winding needles disposed on the turret, the turret being rotatably disposed, and each winding needle passing through a first station and a second station in sequence during the rotation of the turret, and when the winding needle located at the first station rotates with the turret to the second station, the other winding needle rotates with the turret to the first station;

[0030] During the process of the moving part rotating around the winding needle located at the first station, the rolling assembly presses the material strip against the winding needle located at the first station, the cutting assembly cuts the material strip from the downstream side of the rolling assembly, the trigger assembly pushes the clamping block away from the clamping surface, and the pushing assembly pushes the upstream cut end of the material strip into the gap of the winding needle located at the first station.

[0031] In actual use, the aforementioned winding device moves the material strip past the winding needle at the first station. First, the moving component drives the cutting and pushing mechanism and the trigger assembly toward the winding needle at the first station. During this process, the cutting and pushing mechanism first presses the material strip against the winding needle at the first station and then cuts the material strip pressed against the winding needle. Simultaneously, the trigger assembly pushes the clamping block away from the clamping surface by a certain distance (at which point the first elastic member is further compressed). The cutting and pushing mechanism pushes the upstream cut end of the material strip into the gap between the winding needle at the first station until the upstream cut end of the material strip enters the gap between the clamping block and the clamping surface. At this point, the clamping block, under the action of the first elastic member, approaches the clamping surface until the clamping block clamps the upstream cut end of the material strip between the clamping block and the clamping surface, thereby securing the upstream cut end of the material strip relative to the winding needle at the first station, enabling the winding of the material strip as the winding needle at the first station rotates about its axis. Finally, the moving component drives the cutting and pushing mechanism and the trigger assembly away from the winding needle located at the first station.

[0032] In this way, the trigger assembly pushes the clamping block, causing it to move away from the clamping surface, thereby opening the clamping block and the clamping surface, allowing the cutting and pushing mechanism to push the upstream cut end of the material strip between the clamping block and the clamping surface. Furthermore, under the preload force provided by the first elastic member, the clamping block can move toward the clamping surface until the upstream cut end of the material strip is pressed and fixed on the clamping surface. The opening and clamping action of the clamping block and the clamping surface is reliable, firmly clamping the upstream cut end of the material strip, and helping to prevent the upstream cut end of the material strip from separating from the winding needle, making it impossible to wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a winding device in one embodiment of the present invention;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the winding needle, cutting and pushing mechanism and clamping mechanism in the winding device;

[0035] Figure 3 for Figure 1 The schematic diagram of the structure of the winding needle and the clamping mechanism in the winding device shown;

[0036] Figure 4 for Figure 3 Schematic diagram of the assembly structure of the clamping assembly and the winding needle of the clamping mechanism shown;

[0037] Figure 5 for Figure 4 A schematic diagram of the partial structure of the clamping block and the abutting block of the clamping assembly shown;

[0038] Figure 6 for Figure 4 A schematic structural diagram of a clamping block and an abutting block of the clamping assembly shown;

[0039] Figure 7 Schematic diagram of the structure of the winding needle and the clamping assembly in some embodiments of the present invention;

[0040] Figure 8 Schematic diagram of the structure of the winding needle and the clamping assembly in other embodiments of the present invention;

[0041] Figure 9 for Figure 8 The schematic diagram of the partial structure of the winding needle shown (the first outer needle and the second outer needle are omitted). DETAILED DESCRIPTION

[0042] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate 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 implementation methods.

[0048] See also Figures 1 to 3 One embodiment of the present invention provides a winding device, comprising a winding mechanism 10, a moving part 24, a cutting and pushing mechanism 20, and a clamping mechanism 30. The winding mechanism 10 comprises a winding needle 11 located at a first station a1, the winding needle 11 having a clamping slit 12 and a clamping surface 111 as a side wall of the clamping slit 12 (see FIG. Figure 2 or Figure 3 ). The winding needle 11 is used to wind the material strip a12. The cutting and pushing mechanism 20 is arranged on the moving part 24, and is used to press the material strip a12 onto the winding needle 11 located at the first station a1, and cut the material strip a12 pressed on the winding needle 11 located at the first station a1, and send the upstream cut end of the material strip a12 into the slit 12 of the winding needle 11 located at the first station a1. The clamping mechanism 30 includes a clamping assembly 31 and a trigger assembly 32. The clamping assembly 31 includes a clamping block 311 and a first elastic member 313. The clamping block 311 is arranged on the winding needle 11, and can approach or move away from the clamping surface 111 to clamp or loosen the upstream cut end of the material strip a12 entering the slit 12. The first elastic member 313 is connected between the clamping block 311 and the winding needle 11, and is used to provide a pre-tightening force that causes the clamping block 311 to have a movement tendency close to the clamping surface 111. The trigger assembly 32 can push the clamping block 311 away from the clamping surface 111 under the drive of the moving part 24, so that the upstream cut end of the material strip a12 can enter between the clamping block 311 and the clamping surface 111 under the pushing action of the cutting and pushing mechanism 20.

[0049] Among them, when the moving part 24 drives the cutting and pushing mechanism 20 and the trigger assembly 32 to approach the winding needle 11, the cutting and pushing mechanism 20 presses the material strip a12 onto the winding needle 11 located at the first workstation a1, and cuts off the material strip a12 pressed onto the winding needle 11 located at the first workstation a1; the trigger assembly 32 pushes the clamping block 311 away from the clamping surface 111, and the cutting and pushing mechanism 20 also pushes the upstream cut end of the material strip a12 toward the gap 12 of the winding needle 11, so that the upstream cut end of the material strip a12 enters between the clamping block 311 and the clamping surface 111 and can be clamped and fixed by the clamping block 311 and the clamping surface 111.

[0050] During actual use of the aforementioned winding device, when the material strip a12 passes through the winding needle 11 located at the first station a1, the moving component 24 first drives the cutting and pushing mechanism 20 and the trigger assembly 32 to move toward the winding needle 11 located at the first station a1. During this process, the cutting and pushing mechanism 20 first presses the material strip a12 against the winding needle 11 located at the first station a1, and then cuts the material strip a12 pressed against the winding needle 11. Simultaneously, the trigger assembly 32 pushes the clamping block 311 a certain distance away from the clamping surface 111 (at which point the first elastic member 313 is further compressed). The cutting and pushing mechanism 20 then pushes the upstream cut end of the material strip a12 formed by cutting into the gap 12 of the winding needle 11 located at the first station a1, until the upstream cut end of the material strip a12 enters between the clamping block 311 and the clamping surface 111. At this point, the clamping block 311, under the action of the first elastic member 313, approaches the clamping surface 111 until the clamping block 311 clamps the upstream cut end of the material strip a12 between the clamping block 311 and the clamping surface 111. This achieves the relative fixation between the upstream cut end of the material strip a12 and the winding needle 11 at the first station a1, allowing the winding needle 11 at the first station a1 to rotate about its own axis and wind the material strip a12. Finally, the moving component 24 drives the cutting and pushing mechanism 20 and the trigger assembly 32 away from the winding needle 11 at the first station a1.

[0051] In this way, the trigger assembly 32 is used to push the clamping block 311, causing the clamping block 311 to move away from the clamping surface 111, thereby causing the clamping block 311 and the clamping surface 111 to open to each other, allowing the cutting and pushing mechanism 20 to push the upstream cut end of the material strip a12 between the clamping block 311 and the clamping surface 111. In addition, under the action of the preload force provided by the first elastic member 313, the clamping block 311 can move toward the clamping surface 111 until the upstream cut end of the material strip a12 is pressed and fixed on the clamping surface 111. The opening and clamping action of the clamping block 311 and the clamping surface 111 is reliable, and the upstream cut end of the material strip a12 is firmly clamped, which helps to prevent the upstream cut end of the material strip a12 from separating from the winding needle 11 and becoming unable to be wound.

[0052] It should be noted that the cutting and pushing mechanism 20 and the trigger assembly 32 are both arranged on the moving part 24, and follow the moving part 24 to approach or move away from the winding needle 11 located at the first workstation a1, which is conducive to simplifying the equipment structure and saving space.

[0053] It can be understood that after the cutting and pushing mechanism 20 cuts off the passing material strip a12, an upstream cut-off end located upstream and a downstream cut-off end located downstream are formed at the fracture of the material strip a12. The downstream cut-off end is separated from the upstream cut-off end as the downstream material strip a12 is transported downstream. The upstream cut-off end is pushed by the cutting and pushing mechanism 20 into the gap 12 of the winding needle 11 located at the first workstation a1 and is clamped and fixed by the clamping block 311, so that the winding needle 11 located at the first workstation a1 can wind the material strip a12.

[0054] In an embodiment of the present application, the clamping assembly 31 further includes an abutment block 312 connected to the clamping block 311, the abutment block 312 having a first inclined surface 3121. As the trigger assembly 32 follows the moving component 24 toward the winding needle 11 located at the first station a1, the abutment block 312 abuts against the first inclined surface 3121 of the abutment block 312, thereby converting the movement of the trigger assembly 32 into movement of the abutment block 312 and the clamping block 311 away from the clamping surface 111. In this manner, the moving component 24 drives the trigger assembly 32 toward the winding needle 11 located at the first station a1, causing the trigger assembly 32 to push the abutment block 312 via the first inclined surface 3121. Under the action of the first inclined surface 3121, the movement of the trigger assembly 32 is converted into movement of the abutment block 312 and the clamping block 311 away from the clamping surface 111, thereby ensuring that the upstream cut end of the strip a12 can be pushed between the clamping block 311 and the clamping surface 111.

[0055] Specifically in the embodiment, the abutment block 312 further has a second inclined surface 3122. When the trigger assembly 32 is driven by the moving component 24 away from the winding needle 11 located at the first station a1, it can abut against the second inclined surface 3122, so that the clamping block 311 is pressed against the clamping surface 111 through the abutment block 312, thereby ensuring that the clamping block 311 more firmly presses the upstream cut end of the material strip a12 against the clamping surface 111.

[0056] In this way, when the upstream cut end of the material strip a12 is pushed between the clamping block 311 and the clamping surface 111, the trigger assembly 32, driven by the moving component 24, passes over the first inclined surface 3121. At this time, the clamping block 311, under the action of the first elastic member 313, approaches the clamping surface 111 until the clamping block 311 presses the upstream cut end of the material strip a12 against the clamping surface 111, thereby achieving relative fixation between the upstream cut end of the material strip a12 and the winding needle 11 located at the first station a1. Then, the moving component 24 drives the trigger assembly 32 to move away from the winding needle 11 located at the first station a1, causing the trigger assembly 32 to push against the abutment block 312 via the second inclined surface 3122, thereby transmitting the pushing force acting on the abutment block 312 to the clamping block 311, thereby increasing the pressing force of the clamping block 311 pressing the upstream cut end of the material strip a12. That is to say, at this time, the clamping force of the clamping block 311 to press the upstream cut end of the material strip a12 onto the clamping surface 111 is partly provided by the first elastic member 313, and the other part is provided by the trigger assembly 32, thereby ensuring that the upstream cut end of the material strip a12 is firmly clamped and fixed on the clamping surface 111.

[0057] That is to say, when the trigger assembly 32 moves away from the winding needle 11 located at the first workstation a1 under the drive of the moving part 24, under the dual action of the trigger assembly 32 and the first elastic member 313, the clamping block 311 presses the upstream cut end of the material strip a12 onto the clamping surface 111, ensuring that the upstream cut end of the material strip a12 is clamped more firmly.

[0058] See Figure 4 Optionally, the clamping block 311 is movably connected to the winding needle 11 through a guide rod 314, so that the guide rod 314 is used to guide the movement of the clamping block 311 toward or away from the clamping surface 111, making the clamping or opening action of the clamping block 311 smoother and more reliable.

[0059] See Figures 3 to 5Specifically, in the embodiment, the trigger assembly 32 includes a connecting rod 322 and an abutting roller 321. One end of the connecting rod 322 is connected to the moving component 24, and the abutting roller 321 is rotatably connected to the other end of the connecting rod 322. The moving component 24 drives the abutting roller 321 to approach or move away from the winding needle 11 located at the first station a1 through the connecting rod 322, so that the abutting roller 321 abuts against the first inclined surface 3121 or the second inclined surface 3122 of the abutting block 312. In this way, when it is necessary to fix the upstream cut end of the material strip a12 on the winding needle 11 located at the first station a1, first, the moving component 24 drives the connecting rod 322 and the abutting roller 321 to move toward the winding needle 11 located at the first station a1, so that the abutting roller 321 pushes the abutting block 312 through the first inclined surface 3121, thereby causing the abutting block 312 to drive the clamping block 311 away from the clamping surface 111. Then, driven by the motion component 24, the cutting and pushing mechanism 20 pushes the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11 at the first station a1, until the upstream cut end of the material strip a12 enters between the clamping block 311 and the clamping surface 111. As the motion component 24 continues to approach the winding needle 11 at the first station a1, the abutting roller 321 passes over the first inclined surface 3121 and separates from the first inclined surface 3121. At this time, the clamping block 311, under the action of the first elastic member 313, moves toward the clamping surface 111 until the upstream cut end of the material strip a12 is pressed against the clamping surface 111. Then, the moving component 24 drives the connecting rod 322 and the abutting roller 321 to move away from the winding needle 11 located at the first station a1, causing the abutting roller 321 to push the abutting block 312 via the second inclined surface 3122. This causes the abutting roller 321 to apply a pressing force to the clamping block 311 through the abutting block 312, which compresses the material strip a12. This allows the clamping block 311 to more securely press the upstream cut end of the material strip a12 onto the clamping surface 111. Finally, as the moving component 24 continues to move away from the winding needle 11 located at the first station a1, the abutting roller 321 separates from the second inclined surface 3122 of the abutting block 312.

[0060] It should be noted that the direction in which the abutting roller 321 moves toward or away from the winding needle 11 located at the first station a1 is the first direction of movement. The direction in which the clamping block 311 moves toward or away from the clamping surface 111 is the second direction of movement. The first inclined surface 3121 is inclined with respect to both the first and second directions of movement. As the abutting roller 321 moves toward the winding needle 11 located at the first station a1, the first inclined surface 3121 faces the abutting roller 321, allowing the abutting roller 321 to abut against the first inclined surface 3121 as it approaches the winding needle 11 located at the first station a1.

[0061] The second inclined surface 3122 is also inclined with respect to both the first and second movement directions. When the contact roller 321 moves away from the winding needle 11 at the first station a1, the second inclined surface 3122 faces the contact roller 321, allowing the contact roller 321 to contact the second inclined surface 3122 while moving away from the winding needle 11 at the first station a1.

[0062] Specific to Figure 3 In the illustrated embodiment, the first inclined surface 3121 of the abutment block 312 faces the upper left, while the second inclined surface 3122 of the abutment block 312 faces the lower right. Driven by the moving component 24, as the abutment roller 321 gradually approaches the winding needle 11 from the left side (i.e., moves rightward), it abuts the first inclined surface 3121 of the abutment block 312 and rolls along the first inclined surface 3121 until it passes over the abutment block 312. As the abutment roller 321 rolls along the first inclined surface 3121, it drives the clamping block 311 downward, away from the clamping surface 111, via the abutment block 312.

[0063] After the upstream cut end of the material strip a12 is pushed between the clamping block 311 and the clamping surface 111, as the moving part 24 continues to move closer to the winding needle 11 (i.e., continues to move to the right), the abutment roller 321 passes over the first inclined surface 3121 and reaches the right side of the abutment block 312. At this time, the clamping block 311 moves toward the clamping surface 111 under the action of the first elastic member 313 until the upstream cut end of the material strip a12 is pressed and fixed on the clamping surface 111. Then, the moving part 24 moves in a direction away from the winding needle 11 (i.e., moves to the left), thereby driving the abutment roller 321 to move from the right side of the abutment block 312 to the left. During this process, the abutment roller 321 abuts against the second inclined surface 3122 of the abutment block 312 and rolls along the second inclined surface 3122 until it exits the winding needle 11 located at the first station a1. When the abutting roller 321 rolls along the second inclined surface 3122 , the abutting thrust provided by the abutting roller 321 is transmitted to the clamping block 311 through the abutting block 312 , so that the clamping block 311 can more firmly clamp the upstream cut end of the material strip a12 on the clamping surface 111 .

[0064] Furthermore, there is an arc transition between the first inclined surface 3121 and the second inclined surface 3122. In this way, in actual use, driven by the moving component 24, the abutting roller 321 first rolls along the first inclined surface 3121, and rolls to the arc transition between the first inclined surface 3121 and the second inclined surface 3122. Then, under the action of the first elastic member 313, the clamping block 311 and the abutting block 312 move toward the clamping surface 111. Then, driven by the moving component 24, the abutting roller 321 moves to the second inclined surface 3122, and then rolls along the second inclined surface 3122. The setting of the arc transition ensures that the abutting roller 321 can smoothly roll from the first inclined surface 3121 to the second inclined surface 3122, so that the opening and clamping actions of the clamping block 311 are smooth and reliable.

[0065] Specifically, in this embodiment, the trigger assembly 32 further includes a support 323, a second elastic member 325, and a stopper 324. The support 323 is mounted on the moving component 24. The end of the connecting rod 322, away from the abutment roller 321, is hinged to the support 323, allowing the connecting rod 322 to swing about the hinged end. The second elastic member 325 is connected between the support 323 and the connecting rod 322 to provide a preload force that causes the connecting rod 322 to rotate relative to the support 323 in a predetermined rotational direction. The stopper 324 is mounted on the support 323 and abuts the connecting rod 322 to restrict the connecting rod 322 from rotating relative to the support 323 in the predetermined rotational direction. When the connecting rod 322 and the abutment roller 321 are not subjected to external forces, the connecting rod 322 remains in abutment with the stopper 324 due to the preload force provided by the second elastic member 325. Optionally, the second elastic member 325 is a spring.

[0066] In this way, driven by the moving component 24, as the support 323 approaches the winding needle 11 located at the first station a1, the abutting roller 321 pushes the abutting block 312 via the first inclined surface 3121, causing the abutting block 312 to drive the clamping block 311 away from the clamping surface 111. As the abutting roller 321 rolls along the first inclined surface 3121, the limiter 324 restricts the connecting rod 322, preventing the connecting rod 322 from rotating in the predetermined direction relative to the support 323, thereby ensuring that the abutting roller 321 maintains contact with the first inclined surface 3121, thereby pushing the abutting block 312 and the clamping block 311 away from the clamping surface 111.

[0067] Driven by the moving component 24, as the support 323 moves away from the winding needle 11 at the first station a1, the abutting roller 321 pushes against the abutting block 312 via the second inclined surface 3122 and rolls along the second inclined surface 3122, thereby increasing the pressing force of the clamping block 311 pressing the upstream cut end of the material strip a12 against the clamping surface 111. At the same time, under the pressure provided by the second inclined surface 3122, the abutting roller 321 drives the connecting rod 322 to rotate relative to the support 323 in a direction opposite to the preset rotation direction (during which the second elastic member 325 is further stretched), thereby ensuring that the abutting roller 321 can roll along the second inclined surface 3122 until it is away from the winding needle 11 at the first station a1, preventing the abutting roller 321 from getting stuck with the abutting block 312.

[0068] Furthermore, the position of the limit member 324 relative to the support 323 can be adjusted to adjust the position of the abutment roller 321 through the connecting rod 322, thereby ensuring that when the moving part 24 drives the support 323 to move close to the winding needle 11 located at the first workstation a1, the abutment roller 321 can accurately abut on the first inclined surface 3121 of the abutment block 312.

[0069] Furthermore, the limiting member 324 is threadedly connected to the support 323, so that the position of the limiting member 324 can be adjusted by screwing the limiting member 324, thereby adjusting the position of the abutting roller 321. Optionally, the limiting member 324 can be a limiting screw.

[0070] See Figure 6 As shown, optionally, the clamping block 311 extends longitudinally along the axial direction of the winding needle 11, and abutment blocks 312 are installed at both ends of the longitudinal length of the clamping block 311. The number of trigger assemblies 32 can be two, and the two trigger assemblies 32 are arranged at intervals along a direction parallel to the axial direction of the winding needle 11, and are arranged one-to-one with the two abutment blocks 312. The abutment rollers 321 of the two trigger assemblies 32 synchronously approach or move away from the winding needle 11 located at the first workstation a1, so that the abutment rollers 321 of the two trigger assemblies 32 respectively push the corresponding two abutment blocks 312 to move synchronously, thereby causing the two abutment blocks 312 to synchronously drive the clamping block 311 towards or away from the clamping surface 111.

[0071] It should be noted that the trigger assembly 32 can only be used to push the clamping block 311 away from the clamping surface 111, thereby opening the clamping block 311, when the winding needle 11 is in the first station a1. However, when the winding needle 11 is transferred from the first station a1 to another station, the clamping block 311 must also be controlled to be away from the clamping surface 111 and open in order to unload the battery cells on the winding needle 11.

[0072] In order to enable the clamping block 311 to release the upstream cut end of the material strip a12 after the winding needle 11 leaves the first station a1. Figure 7 As shown, in some embodiments, the winding needle 11 includes a fixed needle assembly 11a, and an outer needle assembly 11b, an inner needle assembly 11c, and a push rod assembly 11d, all disposed on the fixed needle assembly 11a. The outer needle assembly 11b is formed with a clamping slit 12 and a clamping surface 111. A clamping block 311 is disposed on the outer needle assembly 11b and can be moved toward or away from the clamping surface 111. The push rod assembly 11d is capable of driving the inner needle assembly 11c in response to an external force.

[0073] The clamping assembly 31 also includes a toggle 315 connected to the inner needle assembly 11c. When the push rod assembly 11d drives the inner needle assembly 11c, the inner needle assembly 11c can drive the toggle 315 to move the clamping block 311 away from the clamping surface 111, thereby releasing the upstream cut end of the material strip a12 to facilitate the unloading of the battery cells on the winding needle 11.

[0074] In this way, when the winding needle 11 completes winding at the first workstation a1 and is transferred to other workstations (such as the second workstation b2a2 described below), the push rod assembly 11d drives the inner needle assembly 11c to move, and at the same time, the inner needle assembly 11c drives the toggle member 315, so that the toggle member 314 moves the clamping block 311 away from the clamping surface 111, that is, the clamping block 311 releases the upstream cut end of the material strip a12.

[0075] It should be noted that the use of the push rod assembly 11d and the inner needle assembly 11c of the winding needle 11, in conjunction with the toggle member 314, allows the clamping block 311 to loosen the upstream cut end of the material strip a12 entering the gap 12, which is beneficial to simplifying the structure of the winding needle 11.

[0076] Furthermore, the inner needle assembly 11c includes a first inner needle 114 and a second inner needle 115 located in the gap 12. The push rod assembly 11d can drive the first inner needle 114 and the second inner needle 115 to clamp or open each other under the action of external force. The toggle member 315 is connected to the first inner needle 114 or the second inner needle 115. When the push rod assembly 11d drives the first inner needle 114 and the second inner needle 115 to open each other, the first inner needle 114 or the second inner needle 115 drives the toggle member 315 to toggle the clamping block 311 away from the clamping surface 111, thereby loosening the upstream cut end of the material strip a12 to facilitate unloading of the battery cells on the winding needle 11. It should be noted that the first inner needle 114 and the second inner needle 115 are not necessary. In other embodiments, only one of the first inner needle 114 and the second inner needle 115 may be provided, as long as it can drive the toggle member 315 to move the clamping block 311 away from the clamping surface 111. No limitation is made here.

[0077] See Figure 7As shown, in some embodiments, one end of the toggle member 315 is fixedly connected to the first inner needle 114 or the second inner needle 115, and the other end of the toggle member 315 is used to toggle the clamping block 311 away from the clamping surface 111 under the drive of the first inner needle 114 or the second inner needle 115. In this way, when the first inner needle 114 and the second inner needle 115 move away from each other, the toggle member 315 moves with the first inner needle 114 or the second inner needle 115, so that the toggle member 315 toggle the clamping block 311 away from the clamping surface 111.

[0078] See Figure 8 As shown, in other embodiments, a toggle member 315 is hingedly connected to the outer needle assembly 11b, and one end of the toggle member 315 is hingedly connected to the first inner needle 114 or the second inner needle 115. The other end of the toggle member 315 is used to toggle the clamping block 311 away from the clamping surface 111 under the drive of the first inner needle 114 or the second inner needle 115. In this way, when the first inner needle 114 and the second inner needle 115 move away from each other, the toggle member 315 rotates relative to the outer needle assembly 11b under the drive of the first inner needle 114 or the second inner needle 115, so that the toggle member 315 toggle the clamping block 311 away from the clamping surface 111.

[0079] In the embodiment of the present application, the fixed needle assembly 11a includes a rotating base (not shown) and a first fixed needle 110 and a second fixed needle 111 connected to the rotating base. The first fixed needle 110 and the second fixed needle 111 are arranged opposite each other. The rotating base is rotatable about the axis of the winding needle 11 to drive the first fixed needle 110 and the second fixed needle 111 to rotate. The outer needle assembly 11b includes a first slider 118a, a second slider 118b, a first outer needle 112, and a second outer needle 113. The first slider 118a is movably connected to the first fixed needle 110 along the radial direction of the winding needle 11, and the second slider 118b is movably connected to the second fixed needle 111 along the radial direction of the winding needle 11. The first outer needle 112 is mounted on the first slider 118a to follow the first slider 118a in radial movement along the winding needle 11. The second outer needle 113 is mounted on the second slider 118b to follow the second slider 118b in radial movement along the winding needle 11. The above-mentioned gap 12 is formed between the first outer needle 112 and the second outer needle 113 , and the above-mentioned clamping surface 111 is located on the side surface of the first outer needle 112 facing the second outer needle 113 or on the side surface of the second outer needle 113 facing the first outer needle 112 .

[0080] A first cam groove 1181 is defined on the first slider 118a, and a second cam groove 1182 is defined on the second slider 118b. The push rod assembly 11d includes a first push rod 116 and a second push rod 117. The first push rod 116 is movably connected to the first fixed needle 110 along the axial direction of the winding needle 11, and the second push rod 117 is movably connected to the second fixed needle 111 along the axial direction of the winding needle 11. A first cam 1161 is mounted on the first push rod 116, which rolls within the first cam groove 1181. A second cam 1162 is mounted on the second push rod 117, which rolls within the second cam groove 1182.

[0081] When the first push rod 116 and the second push rod 117 approach the rotating seat along the axial direction of the winding needle 11 under the action of external force, the first push rod 116 drives the first slider 118a and the first outer needle 112 away from the second outer needle 113 through the cooperation of the first cam 1161 and the first cam groove 1181; at the same time, the second push rod 117 drives the second slider 118b and the second outer needle 113 away from the first outer needle 112 through the cooperation of the second cam 1162 and the second cam groove 1182, so that the first outer needle 112 and the second outer needle 113 move away from each other and increase the outer diameter of the winding needle 11. When the first push rod 116 and the second push rod 117 are reset along the axial direction of the winding needle 11 when the external force disappears, the first push rod 116 drives the first slider 118a and the first outer needle 112 to approach the second outer needle 113 through the cooperation of the first cam 1161 and the first cam groove 1181; at the same time, the second push rod 117 drives the second slider 118b and the second outer needle 113 to approach the first outer needle 112 through the cooperation of the second cam 1162 and the second cam groove 1182, so that the first outer needle 112 and the second outer needle 113 approach each other and reduce the outer diameter of the winding needle 11.

[0082] Thus, when winding needle 11 is winding at first station a1, first push rod 116 and second push rod 117, under the action of external force, move a certain distance along the axis of winding needle 11 toward the rotating base. This allows first push rod 116 and second push rod 117 to respectively drive first outer needle 112 and second outer needle 113 away from each other, thereby increasing the outer diameter of winding needle 11. At this time, first inner needle 114 and second inner needle 115 are in a clamped state, preventing the toggle member 315 from exerting force on clamping block 311. Consequently, clamping block 311, under the action of first elastic member 313, can clamp the upstream cut end of material strip a12. Driven by the rotating base, winding needle 11 rotates as a whole about its own axis to wind material strip a12.

[0083] When the winding needle 11 at the first workstation a1 is finished and transferred to another workstation, the external force on the first push rod 116 and the second push rod 117 disappears, causing the first push rod 116 and the second push rod 117 to move away from the rotating seat along the axial direction of the winding needle 11 and reset. During this process, the first push rod 116 and the second push rod 117 respectively drive the first outer needle 112 and the second outer needle 113 to approach each other, thereby reducing the outer diameter of the winding needle 11; at the same time, the first push rod 116 and the second push rod 117 respectively drive the first inner needle 114 and the second inner needle 115 to move away from each other and open, so that the first inner needle 114 or the second inner needle 115 drives the toggle member 315 to toggle the clamping block 311, causing the clamping block 311 to move away from the clamping surface 111 and release the upstream cut end of the material strip a12, so that the winding needle 11 can be withdrawn from the battery cell.

[0084] It should be noted that two return springs can be used to provide power for the return movement of the first push rod 116 and the second push rod 117 along the axial direction of the winding needle 11 away from the rotating seat. The specific structure can adopt relatively mature existing technology and is not limited here.

[0085] See Figure 1 and Figure 2 In an embodiment of the present application, the cutting and pushing mechanism 20 includes a roller assembly 21, a cutting assembly 22, and a pushing assembly 23, all of which are arranged on a moving part 24. The roller assembly 21 is used to press the material strip a12 onto the winding needle 11 located at the first station a1. The cutting assembly 22 is used to cut the material strip a12 from the downstream side of the roller assembly 21. The pushing assembly 23 is used to push the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11 located at the first station a1, so that the upstream cut end of the material strip a12 is pressed and fixed on the clamping surface 111 by the clamping block 311.

[0086] Furthermore, the winding needle 11 at the first station a1 can be controlled to rotate about its own axis. The motion component 24 can be controlled to rotate around the winding needle 11 at the first station a1, thereby driving the rolling assembly 21, cutting assembly 22, pushing assembly 23, and trigger assembly 32 to rotate around the winding needle 11 at the first station a1. In other words, while the winding needle 11 at the first station a1 rotates, the motion component 24 drives the rolling assembly 21, cutting assembly 22, pushing assembly 23, and trigger assembly 32 to revolve around the winding needle 11.

[0087] During actual use of the aforementioned winding device, the material strip a12 is transported downstream at a certain speed and passes through the first station a1. The winding needle 11 arrives at the first station a1 and rotates around its own axis. The moving component 24 drives the rolling assembly 21, the cutting assembly 22, the pushing assembly 23, and the trigger assembly 32 to rotate around the winding needle 11 located at the first station a1. At the same time, the moving component 24 drives the rolling assembly 21, the cutting assembly 22, the pushing assembly 23, and the trigger assembly 32 to approach the winding needle 11 located at the first station a1. Driven by the moving component 24, the rolling assembly 21 presses the material strip a12 against the winding needle 11 located at the first station a1. The cutting assembly 22 cuts the material strip a12. Driven by the moving component 24, the trigger assembly 32 approaches the winding needle 11 located at the first station a1, so that the abutting roller 321 of the trigger assembly 32 pushes the abutting block 312 and the clamping block 311 away from the clamping surface 111. Driven by the moving part 24, the pushing assembly 23 pushes the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11 located at the first station a1 until the upstream cut end of the material strip enters between the clamping block 311 and the clamping surface 111. As the moving part 24 continues to move closer to the winding needle 11 located at the first station a1, the abutting roller 321 of the trigger assembly 32 passes over the abutting block 312. At this time, the clamping block 311 moves toward the clamping surface 111 under the action of the first elastic member 313 until the upstream cut end of the material strip a12 is pressed and fixed on the clamping surface 111. Then, the moving part 24 drives the rolling assembly 21, the cutting assembly 22, the pushing assembly 23 and the trigger assembly 32 away from the winding needle 11 located at the first station a1.

[0088] In this way, the material strip a12 is cut without stopping to be conveyed downstream, and the upstream cut end of the material strip a12 is pushed into the gap 12 of the winding needle 11 and is clamped and fixed by the clamping block 311. During this process, the winding needle 11 keeps rotating, which greatly improves the production efficiency on the one hand, and eliminates the needle threading and film splicing actions on the other hand, greatly simplifying the structure of the winding equipment.

[0089] Specifically in the embodiment, the angular velocity of the winding needle 11 rotating around its own axis is equal to the angular velocity of the moving part 24 driving the rolling assembly 21, the cutting assembly 22, the pushing assembly 23 and the trigger assembly 32 to rotate around the winding needle 11, thereby ensuring that in the rotation direction, the rolling assembly 21, the cutting assembly 22, the pushing assembly 23 and the trigger assembly 32, the winding needle 11 located at the first workstation a1 and the material strip a12 remain relatively stationary, thereby ensuring that the cutting assembly 22 performs fly-cutting on the material strip a12, the pushing assembly 23 accurately pushes the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11, and the clamping block 311 accurately clamps and fixes the upstream cut end of the material strip a12 entering the gap 12.

[0090] It should be noted that the movement of the moving part 24 toward the winding needle 11 at the first station a1 is performed simultaneously with the rotation around the winding needle 11 at the first station a1. In other words, the moving part 24 moves toward the winding needle 11 at the first station a1 while rotating around the winding needle 11 at the first station a1.

[0091] It should also be noted that a cam drive mechanism can be used to drive the moving part 24 to move so that the moving part 24 approaches the winding needle 11 at the first station a1, rotates around the winding needle 11, and finally moves away from the winding needle 11. The cam mechanism can adopt relatively mature existing technology and is not limited here.

[0092] Specifically, in the embodiment, the rolling assembly 21 includes a mounting seat 211, a pressure roller 213, and a third elastic member 212. The mounting seat 211 is movably connected to the moving component 24. The pressure roller 213 is unidirectionally rotatably connected to the mounting seat 211. The third elastic member 212 abuts between the mounting seat 211 and the moving component 24, and is used to provide a preload force that causes the mounting seat 211 to have a movement tendency to drive the pressure roller 213 toward the winding needle 11 located at the first station a1. In this way, as the moving component 24 gradually approaches the winding needle 11 located at the first station a1, the moving component 24 drives the pressure roller 213 to gradually approach the winding needle 11 until the pressure roller 213 presses the material strip against the winding needle 11. As the moving component 24 continues to approach the winding needle 11, the third elastic member 212 is further compressed, and under the action of the preload force provided by the third elastic member 212, the pressure roller 213 presses the material strip against the winding needle 11. Optionally, the third elastic member 212 may be a spring.

[0093] Optionally, the pressure roller 213 is mounted on the mounting seat 211 via a one-way bearing, so that the pressure roller 213 can only rotate in one direction relative to the mounting seat 211. Figure 2 In the illustrated embodiment, the pressing roller 213 can only rotate in the clockwise direction, and the winding needle 11 rotates in the counterclockwise direction around its own axis, thereby driving the material strip a12 to be transported downward.

[0094] It should be noted that the provision of the third elastic member 212, on the one hand, ensures that the pressure roller 213 elastically contacts the winding needle 11, thereby avoiding hard impact on the material strip a12 or the winding needle 11 and damaging the material strip a12 or the winding needle 11; on the other hand, ensures compatibility with winding needles 11 of different sizes and material strips a12 of different thicknesses, thereby improving the compatibility of the winding equipment; on the other hand, provides movement space for the moving component 24 to continue to move closer to the winding needle 11 after the pressure roller 213 presses the material strip a12 against the winding needle 11, thereby enabling the moving component 24 to continue to drive the pushing assembly 23 and the trigger assembly 32 to respectively perform the pushing action and the pushing action on the abutment block 312.

[0095] It should also be noted that since the pressure roller 213 can only rotate in one direction, when the pressure roller 213 presses the material strip a12 onto the winding needle 11, the material strip a12 between the pressure roller 213 and the winding needle 11 can only move downstream, but cannot move upstream, thereby avoiding the upstream cut end of the material strip a12 rebounding upstream under the action of tension after the cutting component 22 cuts the material strip a12.

[0096] It should also be noted that the specific structures of the cutting component 22 and the pushing component 23 are not limited here, as long as they can respectively cut the material strip a12 and push the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11.

[0097] See Figure 6 Specifically, in the embodiment, the clamping block 311 extends longitudinally along the axial direction of the winding needle 11, and the clamping block 311 has a plurality of avoidance notches 3110 spaced apart along its longitudinal extension direction. In the process of the clamping block 311 moving toward the clamping surface 111 until the upstream cut end of the clamped material strip a12 is clamped, the plurality of avoidance notches 3110 are used to accommodate the portion of the pushing assembly 22 that enters between the clamping block 311 and the clamping surface 111, thereby preventing the pushing assembly 22 from interfering with the clamping action of the clamping block 311. It should be noted that the number of the avoidance notches 3110 and the spacing between them are determined according to the shape of the pushing assembly 22, and are not limited here, as long as the avoidance can be achieved.

[0098] In the embodiment of the present application, the winding mechanism 10 further includes a turret 13 and at least two winding needles 11 mounted on the turret 13. The turret 13 is rotatable, and each winding needle 11 sequentially passes through a first station a1 and a second station b2 as the turret 13 rotates. When a winding needle 11 at the first station a1 rotates with the turret 13 to the second station b2, another winding needle 11 rotates with the turret 13 to the first station a1.

[0099] Thus, when the cell winding on the winding needle 11 at the first station a1 is completed, the material strip a12 is first conveyed downstream without stopping. The turret 13 drives the winding needle 11 at the first station a1 to rotate to the second station b2, and the other winding needle 11 rotates with the turret 13 to the first station a1. At this time, the winding needle 11 at the first station a1 rotates around its own axis, and the moving component 24 rotates synchronously around the winding needle 11 at the first station a1, gradually approaching the winding needle 11 at the first station a1. Driven by the moving component 24, the rolling assembly 21 presses the material strip a12 against the winding needle 11 at the first station a1. Then, the cutting assembly 22 cuts the material strip a12. Driven by the moving component 24, the abutting roller 321 of the trigger assembly 32 approaches the winding needle 11 at the first station a1 and pushes the abutting block 312 via the first inclined surface 3121, causing the abutting block 312 to drive the clamping block 311 away from the clamping surface 111. Driven by the moving component 24, the pushing assembly 23 pushes the upstream cut end of the material strip a12 into the gap 12 of the winding needle 11 at the first station a1 until the upstream cut end of the material strip a12 reaches between the clamping block 311 and the clamping surface 111. As the moving component 24 continues to move closer to the winding needle 11 at the first station a1, the abutting roller 321 passes over the first inclined surface 3121 and separates from the first inclined surface 3121. At this time, the clamping block 311, under the action of the first elastic member 313, moves toward the clamping surface 111 until the upstream cut end of the material strip a12 is pressed and fixed to the clamping surface 111. Then, the moving part 24 gradually moves away from the winding needle 11 located at the first station a1, thereby driving the abutting roller 321 of the trigger assembly 32 away from the winding needle 11 located at the first station a1, and pushing the abutting block 312 through the second inclined surface 3122, so that the clamping block 311 more firmly presses the upstream cut end of the material strip a12 to the clamping surface 111. As the moving part 24 continues to move away from the winding needle 11 located at the first station a1, it drives the pressure roller 213 to separate from the winding needle 11 located at the first station a1. At this time, the winding needle 11 located at the first station a1 winds the material strip a12. The winding needle 11 located at the second station b2 continues to wind until all the cut material strip a12 is wound onto the battery cell, and then performs actions such as applying finishing glue and / or unloading on the battery cell on the winding needle 11 located at the second station b2.

[0100] Specifically in the embodiment, the winding device further includes a first unwinding mechanism, a second unwinding mechanism, a third unwinding mechanism, a fourth unwinding mechanism, a first sheet inserting mechanism 40 and a second sheet inserting mechanism 50 .

[0101] The first unwinding mechanism is used to output the first diaphragm a1 to the first workstation a1, the second unwinding mechanism is used to output the first electrode material strip a3 to the first workstation a1, the third unwinding mechanism is used to output the second diaphragm a2 to the first workstation a1, and the fourth unwinding mechanism is used to output the second electrode material strip a4 to the first workstation a1. The first inserting mechanism 40 is arranged between the second unwinding mechanism and the first workstation a1. The first inserting mechanism 40 is used to cut the first electrode material strip a3 passing through and send the starting end of the first electrode material strip a3 to the winding needle 11 located at the first workstation a1, so that the winding needle 11 located at the first workstation a1 can wind the first electrode material strip a3 when it rotates. The second inserting mechanism 50 is arranged between the fourth unwinding mechanism and the first workstation a1. The second inserting mechanism 50 is used to cut the second pole piece strip a4 passing through, and send the starting end of the second pole piece strip a4 to the winding needle 11 located at the first work station a1, so that the winding needle 11 located at the first work station a1 can wind the second pole piece strip a4 when it rotates.

[0102] In this way, the first unwinding mechanism, the second unwinding mechanism, the third unwinding mechanism, and the fourth unwinding mechanism respectively unwind the first separator a1, the first electrode material strip a3, the second separator a2, and the second electrode material strip a4 to the winding needle 11 at the first station a1. The winding needle 11 at the first station a1 rotates to wind the first separator a1, the first electrode material strip a3, the second separator a2, and the second electrode material strip a4 to form a battery cell.

[0103] When the winding of the battery cell on the winding needle 11 at the first station a1 is completed, first, the first inserting mechanism 40 cuts off the first electrode material strip a3 passing through, and the second inserting mechanism 50 cuts off the second electrode material strip a4 passing through. Then, the turret 13 rotates until it drives the winding needle 11 at the first station a1 to reach the second station b2, and another winding needle 11 reaches the first station a1 and rotates around its own axis. At the same time, the moving part 24 drives the rolling assembly 21 to press the passing material strip a12 (i.e., the first diaphragm a1 and the second diaphragm a2) against the winding needle 11 at the first station a1, and rotates synchronously around the winding needle 11 at the first station a1. Then, the cutting assembly 22 cuts the material strip a12 (i.e., the first diaphragm a1 and the second diaphragm a2). Driven by the moving component 24, the contact roller 321 of the trigger assembly 32 approaches the winding needle 11 located at the first station a1 and pushes the contact block 312 via the first inclined surface 3121, causing the contact block 312 to drive the clamping block 311 away from the clamping surface 111. Similarly, driven by the moving component 24, the pushing assembly 23 pushes the upstream cut end of the cut material strip a12 (i.e., the upstream cut ends of the first diaphragm a1 and the second diaphragm a2) into the gap 12 of the winding needle 11 located at the first station a1 until the upstream cut end of the material strip a12 reaches between the clamping block 311 and the clamping surface 111. As the moving component 24 continues to move closer to the winding needle 11 located at the first station a1, the contact roller 321 passes over the first inclined surface 3121 and separates from the first inclined surface 3121. At this time, the clamping block 311 moves toward the clamping surface 111 under the action of the first elastic member 313 until the upstream cut end of the material strip a12 is pressed and fixed on the clamping surface 111 .

[0104] Then, the moving part 24 moves away from the winding needle 11 located at the first station a1, thereby driving the abutment roller 321 of the trigger assembly 32 away from the winding needle 11 located at the first station a1, and pushes the abutment block 312 through the second inclined surface 3122, so that the clamping block 311 can more firmly press and fix the upstream cut end of the material strip a12 (that is, the upstream cut end of the first diaphragm a1 and the second diaphragm a2) on the clamping surface 111.

[0105] Then, the first inserting mechanism 40 inserts the starting end of the first electrode strip a3 between the first diaphragm a1 and the second diaphragm a2, causing the first electrode strip a3 to be wound along with the first and second diaphragms a1 and a2 onto the winding needle 11 located at the first station a1. Simultaneously, the second inserting mechanism 50 also inserts the starting end of the second electrode strip a4 between the second diaphragm a2 and the winding needle 11 located at the first station a1, causing the second electrode strip a4 to be wound along with the second diaphragm a2 onto the winding needle 11 located at the first station a1. At this point, the winding needle 11 located at the first station a1 simultaneously winds the first diaphragm a1, the first electrode strip a3, the second diaphragm a2, and the second electrode strip a4 to form a battery cell.

[0106] During the above process, while the cutting assembly 22 cuts the material strip a12 (i.e., the first and second separators a1 and a2), the winding needle 11 at the second station b2 continues winding until the cut first and second separators a1 and a2 are completely wound onto the battery cells. The battery cells on the winding needle 11 at the second station b2 then undergo tail glue application and / or blanking.

[0107] It should be noted that the winding operation steps described above are only one embodiment. Of course, in other embodiments, other winding operation steps can also be used, as long as they can achieve the winding and forming of the battery cell, and are not limited here.

[0108] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0109] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A winding device, characterized in that: include: A winding mechanism, comprising a winding needle for winding the material strip, the winding needle having a clamping gap and a clamping surface serving as a side wall of the clamping gap; a moving part, which can be controlled to move closer to or away from the winding needle; A cutting and pushing mechanism is provided on the moving component; and The material clamping mechanism includes a clamping assembly and a trigger assembly provided on the moving component. The clamping assembly includes a clamping block and a first elastic member. The clamping block is provided on the winding needle and can move closer to or further away from the clamping surface relative to the winding needle. The first elastic member is connected between the clamping block and the winding needle and is used to provide a preload force that causes the clamping block to have a movement tendency toward the clamping surface. When the moving part approaches the winding needle, the cutting and pushing mechanism presses the material strip against the winding needle and cuts the material strip pressed against the winding needle. The trigger assembly pushes the clamping block away from the clamping surface. The cutting and pushing mechanism also pushes the upstream cut end of the material strip toward the clamping gap of the winding needle, so that the upstream cut end of the material strip enters between the clamping block and the clamping surface. The clamping assembly further includes an abutment block connected to the clamping block, wherein the abutment block has a first inclined surface.

2. The winding device according to claim 1, characterized in that When the moving component drives the trigger assembly toward the winding needle, the trigger assembly can abut against the first inclined surface to convert the movement of the trigger assembly into movement of the abutment block and the clamping block away from the clamping surface.

3. The winding device according to claim 2, characterized in that The abutment block further has a second inclined surface. When the moving component drives the trigger assembly away from the winding needle, the trigger assembly can abut against the second inclined surface to press the clamping block onto the clamping surface through the abutment block.

4. The winding device according to claim 3, characterized in that There is an arc transition between the first inclined surface and the second inclined surface.

5. The winding device according to claim 3, characterized in that The trigger assembly includes a connecting rod and an abutting roller, one end of the connecting rod is mounted on the moving component, and the abutting roller is rotatably connected to the other end of the connecting rod; When the moving component drives the connecting rod to approach or move away from the winding needle, the connecting rod drives the abutting roller to abut against the first inclined surface or the second inclined surface.

6. The winding device according to claim 5, characterized in that The trigger assembly further includes a support, a second elastic member, and a limit member. The support is mounted on the moving component. An end of the connecting rod away from the abutting roller is hinged to the support. The second elastic member is connected between the support and the connecting rod to provide a preload force that causes the connecting rod to rotate relative to the support in a preset direction of rotation. The limiting member is mounted on the support and abuts against the connecting rod to limit the connecting rod from rotating relative to the support along the preset rotation direction.

7. The winding device according to claim 6, characterized in that In the process in which the moving component drives the abutting roller to roll along the second inclined surface via the connecting rod, the abutting roller drives the connecting rod to rotate relative to the support in a direction opposite to the preset rotation direction.

8. The winding device according to claim 6, characterized in that The position of the limiting member relative to the support is adjustable, so that the position of the abutting roller can be adjusted through the connecting rod.

9. The winding device according to claim 1, characterized in that The winding needle comprises a fixed needle assembly and an outer needle assembly, an inner needle assembly and a push rod assembly all arranged on the fixed needle assembly; The outer needle assembly is formed with the clamping slit and the clamping surface. The clamping block is provided on the outer needle assembly and can move toward or away from the clamping surface. The push rod assembly can drive the inner needle assembly to move under the action of an external force. The clamping assembly further includes a toggle member connected to the inner needle assembly; when the push rod assembly drives the inner needle assembly to move, the inner needle assembly can drive the toggle member to toggle the clamping block away from the clamping surface.

10. The winding device according to claim 9, characterized in that One end of the toggle member is fixedly connected to the inner needle assembly, and the other end of the toggle member is used to toggle the clamping block away from the clamping surface under the drive of the inner needle assembly; or The toggle member is hinged to the outer needle assembly, and one end of the toggle member is hinged to the inner needle assembly. The other end of the toggle member is used to toggle the clamping block away from the clamping surface under the drive of the inner needle assembly.

11. The winding device according to any one of claims 1 to 10, characterized in that The cutting and pushing mechanism includes a rolling assembly, a cutting assembly and a pushing assembly, all of which are arranged on the moving part. The rolling assembly is used to press the material strip onto the winding needle, the cutting assembly is used to cut the material strip from the downstream side of the rolling assembly, and the pushing assembly is used to push the upstream cut end of the material strip into the gap of the winding needle.

12. The winding device according to claim 11, characterized in that The winding needle can be controlled to rotate around its own axis, and the moving component can be controlled to rotate around the winding needle.

13. The winding device according to claim 12, characterized in that The angular velocity of the winding needle rotating around its own axis is equal to the angular velocity of the moving component rotating around the winding needle.

14. The winding device according to claim 12, characterized in that The winding mechanism further includes a turret and at least two winding needles arranged on the turret, wherein the turret is rotatably arranged, and each winding needle passes through a first station and a second station in sequence during the rotation of the turret, and when the winding needle located at the first station rotates with the turret to the second station, the other winding needle rotates with the turret to the first station; During the process of the moving part rotating around the winding needle located at the first station, the rolling assembly presses the material strip against the winding needle located at the first station, the cutting assembly cuts the material strip from the downstream side of the rolling assembly, the trigger assembly pushes the clamping block away from the clamping surface, and the pushing assembly pushes the upstream cut end of the material strip into the gap of the winding needle located at the first station.

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