Battery cell winding equipment

Abstract

The utility model provides battery core winding equipment, which comprises a winding needle, a winding roller, a winding roller, a winding roller and a winding roller, wherein the winding needle is positioned at a winding station and can continuously rotate; the cutting part is arranged on the radial side of the winding needle and is provided with a cutter for cutting off the diaphragm; the first driving part is in transmission connection with the material cutting part and can drive the material cutting part to be close to the winding needle, so that the material cutting part and the winding needle are located on the two sides of the diaphragm respectively; the second driving part is in transmission connection with the cutting part and can drive the cutting part to rotate around the axis of the winding needle, and the rotation angular speed of the cutting part is equal to that of the winding needle; the cutter is located on the head-on side of the cutting member so as to cut off the diaphragm separated from the winding needle. According to the arrangement, the cutting piece and the winding needle rotate synchronously, the cutter on the cutting piece can cut off the diaphragm when the diaphragm is separated from the winding needle, the cutter is suspended to cut off the diaphragm, and a groove for the cutter to abut against is not needed to be formed in the winding needle, so that the structure of the winding needle can be simplified, the structural strength of the winding needle can be improved, and damage of the cutter to the winding needle is avoided.

Description

Technical Field

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

[0002] In the battery manufacturing process, the winding of the battery cell is usually completed by a winder, which can stack the positive and negative electrode sheets and two layers of separators in order and wind them to form a battery cell. In the prior art, the winding action of the winder is mostly intermittent, and when the separator is cut, the speed of the material belt is zero. In a winding cycle, the acceleration and deceleration process of the material belt takes a long time, resulting in low winding efficiency.

[0003] After a single battery cell is wound, the diaphragm needs to be cut. In the prior art, the cutting is usually performed by a cutter abutting against the outer circumference of the winding needle. However, a groove needs to be provided on the outer surface of the winding needle for the cutter to extend into. This not only has a complex structure, but also affects the structural strength of the winding needle. Utility Model Content

[0004] In view of this, the present application provides a battery cell winding device, which does not abut against the winding needle when cutting the diaphragm, thereby helping to protect the winding needle.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A battery cell winding device, comprising:

[0007] The winding needle is in the winding position and can rotate continuously;

[0008] A cutting piece, arranged on the radial side of the winding needle, provided with a cutter for cutting off the diaphragm;

[0009] A first driving member is connected to the cutting member in a transmission manner and is capable of driving the cutting member to approach the winding needle so that the cutting member and the winding needle are respectively located on two sides of the diaphragm;

[0010] The second driving member is connected to the cutting member in driving connection, and can drive the cutting member to rotate around the axis of the winding needle, and the cutting member and the winding needle have the same rotation angular velocity; the cutting knife is located on the front side of the cutting member so as to be able to cut off the diaphragm detached from the winding needle.

[0011] Optionally, the first driving member can drive the cutting member to move axially along the winding needle to approach and move away from the winding needle;

[0012] And / or, the first driving member can drive the cutting member to move radially along the winding needle so as to approach and move away from the winding needle.

[0013] Optionally include:

[0014] A third driving member is connected to the cutting member in a transmission manner and is capable of driving the cutting member to move along the axial direction of the winding needle so as to be drawn out from the diaphragm;

[0015] The first driving member can drive the cutting member to press the diaphragm onto the outer peripheral surface of the winding needle, and driven by the second driving member, the cutting member can wind the diaphragm onto the winding needle.

[0016] Optionally, the cutter is telescopically connected to the cutting piece so as to be hidden relative to the cutting piece after the diaphragm is cut off.

[0017] Optionally, the outer peripheral surface of the winding needle is provided with a pressing groove for the cutting piece to be at least partially embedded, and the first driving member can drive the cutting piece to press the diaphragm into the pressing groove.

[0018] Optionally, an air blowing area is provided on the cutting piece, and the air blowing area is close to the winding needle.

[0019] Optionally, an air guide channel is provided inside the cutting piece, and a plurality of air blowing holes are provided in the air blowing area, and the plurality of air blowing holes are communicated with the air guide channel.

[0020] Optionally, the cutting piece is configured to be strip-shaped and extends along the axial direction of the winding needle.

[0021] Optionally include:

[0022] The pressure roller is arranged on the radial side of the winding needle, can rotate along its own axis, and can be close to the winding needle to press the diaphragm against the outer peripheral surface of the winding needle.

[0023] Optionally include:

[0024] A carrier, capable of being displaced relative to the winding needle under the drive of the first driving member;

[0025] Wherein, the cutting member is connected to the supporting member, and can be rotated relative to the supporting member around the axis of the winding needle under the drive of the second driving member.

[0026] Optionally include:

[0027] A rotating ring, connected to the carrier, capable of rotating along its own axis relative to the carrier, and capable of being sleeved on the outer side of the winding needle;

[0028] Wherein, the cutting piece is connected to the supporting piece through the rotating ring.

[0029] Optionally, a plurality of rollers are rotatably connected to the carrier, the plurality of rollers are arranged around the outer circumference of the rotating ring and are transmission-connected to the rotating ring; the second driving member is configured as a rotating driving member and is transmission-connected to at least one of the plurality of rollers.

[0030] Optionally, the roller is connected to the rotating ring by meshing transmission or friction transmission.

[0031] Optionally, the plurality of rollers include a driving wheel and at least one driven wheel, the driving wheel being transmission-connected to the rotary drive member and being transmission-connected to the driven wheel.

[0032] Optionally, the second driving member includes:

[0033] A connecting structure connects the rotating ring and the winding needle and is capable of switching between a connected state and a disconnected state; when the connecting structure is in the connected state, the rotating ring rotates synchronously with the winding needle relative to the supporting member, and when the connecting structure is in the disconnected state, the winding needle rotates relative to the rotating ring and the supporting member.

[0034] Optionally, the connection structure includes:

[0035] A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle;

[0036] The second connection part is arranged on the rotating ring and can be displaced to the rotating path of the first connection part, so that the first connection part can drive the second connection part and the rotating ring to rotate synchronously.

[0037] Optionally, the connection structure includes:

[0038] A fourth driving member is arranged on the rotating ring, and a driving end is connected to the second connecting part. The fourth driving member can drive the second connecting part to approach and move away from the winding needle so that the second connecting part enters and exits the rotating path of the first connecting part.

[0039] Optionally include:

[0040] The return structure is arranged on the rotating ring and the bearing member, and can drive the rotating ring to return to an initial position relative to the bearing member.

[0041] Optionally, the return structure includes:

[0042] A first limiting member, disposed on the bearing member;

[0043] A second limiting member is arranged on the rotating ring;

[0044] The elastic member connects the rotating ring and the bearing member, and can drive the rotating ring to rotate relative to the bearing member, so that the first limiting member limits the second limiting member in an initial state.

[0045] The cell winding device provided by the present application, during operation, the first driving member drives the cutting member to move, and when the member moves to the first position close to the winding needle, the diaphragm is sandwiched between the cutting member and the outer peripheral surface of the winding needle; the second driving member drives the cutting member to rotate around the axis of the winding needle, so that the cutting member and the winding needle rotate synchronously with the diaphragm clamped, and when the diaphragm is separated from the winding needle, the diaphragm is guided to the blade of the cutting member, and the cutting member and the winding needle continue to rotate synchronously, and then the diaphragm separated from the winding needle is cut off by the cutter of the cutting member. In this way, the cutting member and the winding needle rotate synchronously, and the cutter on the cutting member can cut off the diaphragm when the diaphragm is separated from the winding needle. Since the cutter cuts the diaphragm in mid-air, there is no need to set a groove on the winding needle for the cutter to abut, thereby simplifying the structure of the winding needle, improving the structural strength of the winding needle, and avoiding damage to the winding needle by the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0047] Figure 1 It is a schematic structural diagram of a battery cell winding device shown in some embodiments;

[0048] Figure 2 It is a schematic diagram of the principle of cutting the diaphragm by the cutting piece shown in some embodiments;

[0049] Figure 3 It is a structural diagram of a pressing trough shown in some embodiments;

[0050] Figure 4 The structure of the carrier shown in some embodiments Figure 1 ;

[0051] Figure 5 The structure of the carrier shown in some embodiments Figure 2 ;

[0052] Figure 6 The main view of the carrier shown in some embodiments Figure 1 ;

[0053] Figure 7 The main view of the carrier shown in some embodiments Figure 2 .

[0054] In the figure: 1. winding needle; 11. pressing groove; 2. cutting member; 21. cutting knife; 22. blowing area; 3. bearing member; 31. rotating ring; 32. fourth driving member; 33. second connecting part; 34. first connecting part; 35. first limiting member; 36. elastic member; 37. roller; 4. pressure roller; 5. downstream device. DETAILED DESCRIPTION

[0055] 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.

[0056] like Figure 1-Figure 7 As shown, an embodiment of the present application provides a battery cell winding device, including a winding needle 1, a cutting member 2, a first driving member and a second driving member.

[0057] Among them, the winding needle 1 is in the winding needle 1 station, which is used to wind the diaphragm and the pole piece, and the winding needle 1 can rotate continuously to realize the non-stop winding of the winding needle 1 equipment, which is beneficial to improve the winding efficiency.

[0058] The cutting piece 2 is arranged on the radial side of the winding needle 1 so that the cutting piece 2 can move closer to and away from the central axis of the winding needle 1 along the radial displacement of the winding needle 1, wherein the cutting piece 2 can be aligned with the outer peripheral surface of the winding needle 1 or offset from the outer peripheral surface of the winding needle 1.

[0059] The first driving member is connected to the cutting member 2 in transmission, and the first driving member can drive the cutting member 2 to approach and move away from the winding needle 1. In the process of the first driving member driving the cutting member 2 to move to the first position close to the winding needle 1, the cutting member 2 gradually approaches the diaphragm on the outer peripheral surface of the winding needle 1 until the diaphragm is clamped between the cutting member 2 and the outer peripheral surface of the winding needle 1.

[0060] It should be noted that when the cutting piece 2 is in the first position, the cutting piece 2 can be in contact with the outer peripheral surface of the winding needle 1, or a small gap can be left between the cutting piece 2 and the outer peripheral surface of the winding needle 1. The direction in which the first driving member drives the cutting piece 2 to move can be set to the radial direction of the winding needle 1, or to the axial direction of the winding needle 1. It is only necessary that when the cutting piece 2 reaches the first position, it is aligned with the outer peripheral surface of the winding needle 1 and clamped on the diaphragm.

[0061] The second driving member is connected to the cutting member 2 by transmission, and the second driving member can drive the cutting member 2 to rotate around the axis of the winding needle 1, so that the rotation angular velocity of the cutting member 2 is equal to the rotation angular velocity of the winding needle 1. At this time, the cutting member 2 rotates synchronously with the winding needle 1, and the outer peripheral surfaces of the cutting member 2 and the winding needle 1 remain stationary. The cutting member 2 and the winding needle 1 clamp the diaphragm and rotate synchronously. Among them, the front side of the cutting member 2 is provided with a cutter 21, which is one side of the cutting member 2 in the rotation direction. Since the diaphragm will be separated from the winding needle 1 under the drive of the downstream device 5 (such as the guide roller or the winding needle of the glue laminating station), when the diaphragm is separated from the winding needle 1, the diaphragm will be guided to the cutter 21 of the cutting member 2, and then the diaphragm will be cut by the cutter 21 of the cutting member 2.

[0062] It should be noted that if Figure 2 As shown, under the action of the second driving member, the cutting member 2 rotates around the axis of the winding needle 1, and can at least rotate the cutting member 2 from the first position to the second position. When the cutting member is in the second position, the diaphragm detached from the winding needle is guided to the cutting knife of the cutting member, and the cutting member 2 continues to rotate synchronously with the winding needle, so as to cut off the diaphragm detached from the winding needle 1.

[0063] During the working process, the first driving member drives the cutting member 2 to move, and when it moves to the first position close to the winding needle 1, the diaphragm is clamped between the cutting member 2 and the outer peripheral surface of the winding needle 1; the second driving member drives the cutting member 2 to rotate around the axis of the winding needle 1, so that the cutting member 2 and the winding needle 1 rotate synchronously with the diaphragm clamped therein, and when the diaphragm is detached from the winding needle 1, the diaphragm is guided to the blade of the cutting member 2, and the cutting member 2 and the winding needle 1 continue to rotate synchronously, and then the diaphragm detached from the winding needle 1 is cut off by the cutting knife 21 of the cutting member 2.

[0064] With such arrangement, the cutting piece 2 and the winding needle 1 rotate synchronously, and the cutter 21 on the cutting piece 2 can cut the diaphragm when the diaphragm is separated from the winding needle 1. Since the cutter 21 cuts the diaphragm while suspended in the air, there is no need to provide a groove on the winding needle 1 for the cutter 21 to abut against, thereby simplifying the structure of the winding needle 1, improving the structural strength of the winding needle 1, and preventing the cutter 21 from damaging the winding needle 1.

[0065] In this solution, the first driving member can drive the cutting member 2 to move axially along the winding needle 1 so as to approach and move away from the winding needle 1. When the first driving member drives the cutting member 2 to approach the winding needle 1, the cutting member 2 gradually becomes flush with the winding needle. When the first driving member drives the cutting member 2 to move away from the winding needle 1, the cutting member 2 gradually becomes misaligned with the winding needle 1.

[0066] In addition, the first driving member can drive the cutting member 2 to move radially along the winding needle 1 to approach and move away from the winding needle 1. When the first driving member drives the cutting member 2 to approach the winding needle 1, the cutting member 2 gradually approaches the outer peripheral surface of the winding needle 1, and when the first driving member drives the cutting member 2 to move away from the winding needle 1, the cutting member 2 gradually moves away from the outer peripheral surface of the winding needle 1. During the displacement of the cutting member 2, the cutting member 2 always remains flush with the winding needle 1.

[0067] Of course, in other solutions, the first driving member (or the first driving member cooperates with other driving structures) can drive the cutting member 2 to gradually approach the outer peripheral surface of the winding needle 1 along the radial direction of the winding needle 1, and can drive the cutting member 2 to gradually displace from the winding needle 1 along the axial direction of the winding needle 1. For example, the first driving member is divided into two driving parts, one driving part drives the cutting member 2 to move along the radial direction of the winding needle 1, and the other driving part drives the cutting member 2 to move along the axial direction of the winding needle 1.

[0068] In some embodiments, the battery cell winding device further includes a third driving member, which is transmission-connected to the cutting member 2 and can drive the cutting member 2 to move axially along the winding needle 1 . During operation, the first driving member drives the cutting member 2 to move radially along the winding needle 1. When it moves to the first position close to the winding needle 1, the cutting member 2 presses the diaphragm against the outer peripheral surface of the winding needle 1 (at this time, there is no gap between the cutting member 2 and the outer peripheral surface of the winding needle 1, and they are in contact through the diaphragm); the second driving member drives the cutting member 2 to rotate around the axis of the winding needle 1, so that the cutting member 2 and the winding needle 1 rotate synchronously. After the cutter 21 of the cutting member 2 cuts off the diaphragm that has separated from the winding needle 1, the cutting member 2 and the winding needle 1 continue to rotate synchronously for one circle, and the second layer of diaphragm will wrap the first layer of diaphragm and the cutting member 2. Under the wrapping action of the second layer of diaphragm, the first layer of diaphragm is stably wound on the winding needle 1; the third driving member drives the cutting member 2 to move axially along the winding needle 1, so that the cutting member 2 is pulled out from the inside of the wound diaphragm to facilitate the subsequent winding of the battery cell.

[0069] In this way, the cutting piece 2 can both cut the diaphragm and wind the diaphragm on the winding needle 1, so that the cutting piece 2 integrates two functions, which is conducive to simplifying the structure and saving costs. Moreover, the cutting of the diaphragm and the winding of the diaphragm do not require additional structures on the winding needle 1, which is conducive to simplifying the winding needle 1 and improving the stability and reliability of the winding needle 1 compared with the solution of vacuum adsorption of the diaphragm.

[0070] Of course, in other solutions, the cutting piece 2 is only used to cut the diaphragm, and the diaphragm is wound on the winding needle 1 by other methods, such as vacuum adsorption or gluing.

[0071] In some preferred embodiments, the cutter 21 is retractably connected to the cutting piece 2. When the cutter 21 is in an extended state, the cutter 21 protrudes from the outer surface of the cutting piece 2. When the diaphragm is guided to the cutting piece 2, the diaphragm first contacts the cutter 21 to complete the cutting of the diaphragm. When the cutter 21 is in a retracted state, the cutter 21 is hidden relative to the outer surface of the cutting piece 2, even if the diaphragm contacts the cutting piece 2. The cutter 21 will not cut the diaphragm. The extension and retraction of the cutter 21 relative to the cutting piece 2 is controllable. For example, a power structure such as a motor, a telescopic cylinder or an airbag is provided inside the cutting piece 2, and the extension and retraction of the cutter 21 relative to the cutting piece 2 are adjusted by controlling the power structure. In the working process, before the diaphragm is cut, the cutter 21 protrudes relative to the outer surface of the cutting piece 2 to facilitate cutting of the diaphragm. After the diaphragm is cut, the cutter 21 is hidden relative to the outer surface of the cutting piece 2 to avoid the cutter 21 causing damage to the diaphragm. In this way, by controlling the extension and retraction of the cutter 21 relative to the cutting piece 2, the shape of the cutting piece 2 can be switched for the two functions of diaphragm cutting and diaphragm winding, thereby improving the stability of diaphragm cutting and diaphragm winding.

[0072] like Figure 3 As shown, a pressing groove 11 is provided on the outer peripheral surface of the winding needle 1, and the shape of the pressing groove 11 matches the shape of the cutting piece 2, so that at least a part of the cutting piece 2 can be embedded. During operation, when the first driving member drives the cutting piece 2 to move to the first position close to the winding needle 1, the cutting piece 2 is embedded in the pressing groove 11, and the diaphragm is pressed in the pressing groove 11. Then, under the action of the second driving member, the cutting piece 2 and the winding needle 1 rotate synchronously to drive the diaphragm to be wound on the winding needle 1. In this way, due to the action of the pressing groove 11, the contact area between the cutting piece 2 and the winding needle is increased, that is, the area where the diaphragm is pressed is increased, which can improve the strength of the diaphragm pressed between the cutting piece 2 and the winding needle 1, prevent the diaphragm from detaching from the winding needle 1, and thus improve the winding quality and tightness of the diaphragm.

[0073] It can be understood that the outer peripheral surface of the winding needle 1 is set to be an arc surface. When the cutting piece 2 is embedded in the pressing groove 11, the outer peripheral surface of the whole formed by the winding needle 1 and the cutting piece 2 can be an arc surface, thereby improving the roundness of the subsequent diaphragm or pole piece winding.

[0074] In the specific solution, the cutting piece 2 is configured to be strip-shaped and extends along the axial direction of the winding needle 1. When the first driving member, the second driving member, and the third driving member drive the cutting piece 2 to move, the extending direction of the cutting piece 2 is always the axial direction of the winding needle 1. In this way, the contact between the cutting piece 2 and the winding needle 1 is relatively uniform, so that the cutting piece 2 can be stably and tightly abutted against the outer peripheral surface of the winding needle 1. For example, the cutting piece 2 is configured to be a cylindrical structure, and the cutter 21 protrudes from the outer peripheral surface of the cutting piece 2.

[0075] like Figure 4As shown, a blowing area 22 is provided on the cutting piece 2, and the blowing area 22 is provided on the side of the cutting piece 2 close to the winding needle 1. Since the relative positions of the cutting piece 2 and the winding needle 1 remain stationary during the synchronous rotation of the cutting piece 2 and the winding needle 1, the blowing area 22 is always facing the winding needle 1. Before the cutting piece 2 presses the diaphragm onto the outer peripheral surface of the winding needle, due to the effect of the blowing area, the diaphragm can be blown to fit the winding needle, which is convenient for the clamping of the cutting piece 2 and reduces the diaphragm wrinkles caused by the pressing of the cutting piece 2. Moreover, after the diaphragm is wound on the winding needle 1, when the third driving member drives the cutting piece 2 to move along the axial direction of the winding needle 1, the blowing area 22 blows toward the winding needle 1, which can reduce the friction between the cutting piece 2 and the diaphragm on the winding needle 1, which is conducive to the smooth extraction of the cutting piece 2 from the diaphragm, and prevents the cutting piece 2 from damaging the diaphragm when it is extracted from the diaphragm, thereby improving the quality of the cell winding. In addition, in order to facilitate the removal of the cutting piece 2 from the diaphragm, the size of the cutting piece 2 can be set to be smaller, thereby reducing the contact area between the cutting piece and the diaphragm.

[0076] Among them, the cutting piece 2 is provided with an air guide channel inside, and the blowing area 22 is provided with a plurality of blowing holes, which are distributed in an array and are all connected to the air guide channel. When the blowing area 22 needs to blow air, the air guide channel is connected to the fan so that the air guide channel blows air to the plurality of blowing holes, and then the air in the air guide channel is evenly dispersed to the plurality of blowing holes, and blown out from the plurality of blowing holes. In this way, the structure is simple, stable and reliable, which is conducive to improving the blowing consistency and stability of the blowing area 22.

[0077] A pressure roller 4 is provided on the radial side of the winding needle 1. The pressure roller 4 can rotate along its own axis and can approach the winding needle 1 to press the diaphragm on the outer peripheral surface of the winding needle 1. The pressure roller 4 is provided upstream of the cutting piece 2 so that the diaphragm first passes through the pressure roller 4 and fits on the winding needle 1 as much as possible, and then the diaphragm is cut and wound by the cutting piece 2. In this way, the pressure roller 4 can press the diaphragm on the winding needle 1 to improve the stability of diaphragm transportation.

[0078] In some embodiments, the cell winding device includes a carrier 3, a cutting piece 2 is disposed on the carrier 3, and can be displaced relative to the carrier 3 under the drive of a second driving member, for example, the cutting piece 2 can be displaced along a preset circular path on the carrier 3. Wherein, under the action of the first driving member, the carrier 3 can be displaced relative to the winding needle 1, so that the carrier 3 and the cutting piece 2 are close to and away from the winding needle 1. Specifically, when the carrier 3 drives the cutting piece 2 to move to a first position close to the winding needle 1, the preset circular path of the cutting piece 2 surrounds the outer periphery of the winding needle 1, that is, the axis of the winding needle 1 is at the center of the preset circular path, so that the cutting piece 2 can rotate around the axis of the winding needle 1.

[0079] The carrier 3 is connected with a rotating ring 31, which can rotate along its own axis relative to the carrier 3, and the cutting piece 2 is connected to the carrier 3 through the rotating ring 31. Under the action of the first driving member, when the carrier 3 drives the cutting piece 2 to move to the first position close to the winding needle 1, the rotating ring 31 is sleeved on the outer circumference of the winding needle 1, and at this time, the axis of the rotating ring 31 coincides with the axis of the winding needle 1, so that the rotating ring 31 can rotate along the axis of the winding needle 1. Under the action of the second driving member, the rotating ring 31 drives the cutting piece 2 to move relative to the carrier 3 along a preset circular path, and the preset circular path is the rotation path of the rotating ring 31. In this way, the cutting piece 2 is driven to move relative to the carrier 3 in the form of the rotating ring 31, and the structural stability is good, which is conducive to preventing the movement path of the cutting piece 2 from changing under the action of external force.

[0080] In addition, a circular track is provided on the carrier 3, and the circular track can surround the outer side of the winding needle 1. The cutting piece 2 is connected to the carrier 3 through the circular track, and can be displaced along the circular track under the action of the second driving member. For example, the circular track is set as an annular groove, and the cutting piece 2 is set in the annular groove, and can slide along the annular groove under the action of the second driving member. Under the action of the first driving member, when the carrier 3 drives the cutting piece 2 to move to the first position close to the winding needle 1, the circular track is sleeved on the outer periphery of the winding needle 1. At this time, the axis of the circular track coincides with the axis of the winding needle 1. The cutting piece 2 moves along the circular track and can rotate around the axis of the winding needle 1. In this way, through the setting of the circular track, a preset circular path of the cutting piece 2 can be formed on the carrier 3 to prevent the cutting piece 2 from being deflected during the action.

[0081] Of course, a rotating ring 31 and an annular track may be provided on the carrier 3 , and the rotating ring 31 is connected to the carrier 3 via the annular track, so as to further improve the connection reliability between the rotating ring 31 and the cutting piece 2 .

[0082] In some specific solutions, a bypass groove is provided on the carrier 3, and the bypass groove allows the winding needle 1 to enter from the outside of the carrier 3 to the inside of the carrier 3. Under the action of the first driving member, when the carrier 3 drives the cutting member 2 to move to the first position close to the winding needle 1, the winding needle 1 enters the inside of the bypass groove from the opening of the bypass groove. For example, the inside of the bypass groove is set to be circular, so that the bypass groove is evenly surrounded by the outer periphery of the winding needle 1.

[0083] The rotating ring 31 is connected with the avoidance groove, that is, the inside of the avoidance groove is connected with the rotating ring 31. For example, the outer wall of the rotating ring 31 is arranged on the inner wall of the avoidance groove, or the area surrounded by the rotating ring 31 partially overlaps with the avoidance groove. The rotating ring 31 is provided with an avoidance gap, so that the winding needle 1 can enter the inside of the rotating ring 31 from the outside of the rotating ring 31. When the supporting member 3 drives the cutting member 2 to move to the first position close to the winding needle 1, the winding needle 1 enters the inside of the rotating ring 31 through the avoidance gap. For example, the rotating ring 31 is set to an arc shape with an angle greater than degrees.

[0084] In this way, due to the setting of the avoidance groove and the avoidance gap, the winding needle 1 can be extended into the interior of the supporting member 3 and the rotating ring 31, so that the cutting piece 2 can rotate around the winding needle 1. Moreover, when the rotating ring 31 rotates relative to the supporting member 3, the rotating ring 31 can pass through the notch of the avoidance groove of the supporting member 3, thereby allowing the cutting piece 2 to circle the winding needle 1 for one circle, thereby improving the movement stability of the cutting piece 2.

[0085] Among them, multiple rollers 37 are rotatably connected to the supporting member 3, and the multiple rollers 37 are arranged around the outer circumference of the rotating ring 31 and are transmission connected to the rotating ring 31. For example, the rollers 37 and the rotating ring 31 are transmission connected by meshing or friction. In this way, the rotating ring 31 and the rollers 37 roll relative to each other, thereby realizing the rotational connection of the rotating ring 31 relative to the supporting member 3.

[0086] In the first solution, the second driving member is configured as a rotating driving member and is connected to at least one of the plurality of rollers 37 , thereby driving the rotating ring 31 to rotate relative to the supporting member 3 through the plurality of rollers 37 , and the structure is stable and reliable.

[0087] Specifically, the plurality of rollers 37 include a driving wheel and at least one driven wheel, wherein the driving wheel is in transmission connection with the rotating drive member and is in transmission connection with the driven wheel. For example, the rotating drive member and the driving wheel are directly contacted for transmission, and the driving wheel and the driven wheel are driven by a belt or a chain.

[0088] In the second scheme, the second driving member and the winding needle 1 share the rotational power. The second driving member includes a connecting structure, which connects the cutting member 2 and the winding needle 1 and can be switched between a connected state and a disconnected state to realize the connection and disconnection of the cutting member 2 and the winding needle 1. When the connecting structure is in the connected state, the cutting member 2 is connected to the winding needle 1, and the cutting member 2 rotates synchronously with the winding needle 1 relative to the supporting member 3, thereby making the rotation angular velocity of the cutting member 2 and the winding needle 1 consistent. When the connecting structure is in the disconnected state, the cutting member 2 is disconnected from the winding needle 1, the cutting member 2 does not rotate with the winding needle 1, and the winding needle 1 rotates relative to the cutting member 2 and the supporting member 3. In this way, the winding needle 1 and the cutting member 2 can be connected through the connecting structure, and then the cutting member 2 rotates synchronously with the winding needle 1. Only one power is needed to drive the winding needle 1 and the cutting member 2 to rotate synchronously. The structure is simple and reliable, and the rotation of the cutting member 2 and the winding needle 1 has good consistency, which is easy to control.

[0089] In the scheme based on the rotating ring 31, the connection structure includes a first connection part 34 and a second connection part 33. The first connection part 34 is arranged on the winding needle 1 and can rotate synchronously with the winding needle 1. The second connection part 33 is arranged on the rotating ring 31 and can be displaced to the rotation path of the first connection part 34, so that the first connection part 34 can drive the second connection part 33 and the rotating ring 31 to rotate synchronously. For example, the first connection part 34 is set as a protrusion protruding from the outer peripheral surface of the winding needle 1. The first connection part 34 rotates with the winding needle 1, and the movement track (i.e., the rotation path) of the first connection part 34 is formed on the outer periphery of the winding needle 1. The second connection part 33 can be set as a protrusion protruding from the inner peripheral surface of the rotating ring 31. The second connection part 33 enters and exits the rotation path of the first connection part 34, so that the connection and disconnection of the first connection part 34 and the second connection part 33 can be realized, and then the connection structure can be switched between the connected state and the disconnected state. In this way, the connection structure is simple and reliable, and easy to control.

[0090] In the scheme based on the circular track, the connection structure includes a first connection part and a second connection part. The first connection part is arranged on the winding needle 1 and can rotate synchronously with the winding needle 1. The second connection part is arranged on the cutting piece 2 and can be displaced to the rotation path of the first connection part, so that the first connection part can drive the second connection part and the cutting piece 2 to rotate synchronously. For example, the first connection part is set as a protrusion protruding from the outer peripheral surface of the winding needle 1. The first connection part rotates with the winding needle 1 to form a motion track (i.e., a rotation path) of the first connection part on the outer periphery of the winding needle 1. The second connection part can be set as a protrusion protruding from the outer surface of the cutting piece 2. The second connection part enters and exits the rotation path of the first connection part to realize the connection and disconnection of the first connection part and then switch the connection structure between the connected state and the disconnected state. In this way, the connection structure is simple and reliable, and easy to control.

[0091] In some preferred embodiments, the connection structure further includes a fourth drive member 32. The fourth drive member 32 can be provided with a linear motor or a telescopic cylinder, and has a fixed end and a driving end. The fixed end of the fourth drive member 32 is provided on the rotating ring 31 (or the cutting member 2) so that the entire fourth drive member 32 is fixed relative to the rotating ring 31 (or the cutting member 2). The driving end of the fourth drive member 32 is connected to the second connecting portion 33, or the fourth drive member 32 of the fourth drive member 32 is provided as the second connecting portion 33. During the state switching process of the connection structure, the second connecting portion 33 can be driven to approach and move away from the winding needle 1 by controlling the extension and retraction of the driving end of the fourth drive member 32, so that the connection of the connection structure is realized when the second connecting portion 33 enters the rotation path of the first connecting portion 34. In this way, the state of the connection structure is controlled by the fourth drive member 32, with a high degree of automation, and good adjustment sensitivity and timeliness.

[0092] It should be noted that the telescopic direction of the driving end of the fourth driving member 32 can be set to the radial direction of the winding needle 1, or can be set to the axial direction of the winding needle 1, or other directions, as long as the rotation path of the second connecting part 33 approaching and moving away from the first connecting part 34 is satisfied.

[0093] In some other preferred schemes, the state switching of the connection structure is achieved by the displacement of the carrier 3. Wherein, under the action of the first driving member and the third driving member, the carrier 3 can drive the second connection part 33 to move radially and / or axially along the winding needle 1, so that the second connection part 33 enters and exits the rotation path of the first connection part 34. Specifically, under the action of the first driving member, the carrier 3 can drive the second connection part 33 to move radially along the winding needle 1, so that the second connection part 33 can enter the rotation path of the first connection part 34; under the action of the third driving member, the carrier 3 can drive the second connection part 33 to move axially along the winding needle 1, so that the second connection part 33 can leave the rotation path of the first connection part 34. In this way, controlling the position of the carrier 3 to achieve the state switching of the connection structure is conducive to reducing the amount of driving power and simplifying the structure.

[0094] The displacement of the carrier 3 relative to the winding needle 1 can be driven by a telescopic cylinder or a linear motor, or by a mechanical arm, that is, the structural form of the first drive member and the third drive member. Here, the action mode of the carrier 3 is not limited.

[0095] like Figure 5 , 7As shown, based on the solution of the rotating ring 31, a return structure is provided on the carrier 3, and the return structure is provided on the rotating ring 31 and the carrier 3, and can drive the rotating ring 31 and the cutting piece 2 to return to the initial state relative to the carrier 3. When the connection structure is switched to the connection state, the winding needle 1 drives the rotating ring 31 and the cutting piece 2 to rotate from the initial position to the first direction until they rotate to the final position, and then the connection structure is switched to the disconnection state, and the return structure drives the rotating ring 31 and the cutting piece 2 to rotate back relative to the carrier 3 (i.e., rotate in the opposite direction of the first direction) until they rotate to the initial position. By setting the return structure, the cutting piece 2 can be automatically reset initially, which is conducive to repeated use, without manual adjustment, saving time and effort.

[0096] In addition, based on the scheme of the circular track, a return structure is provided on the carrier 3, and the return structure is provided on the cutting piece 2 and the carrier 3, and can drive the cutting piece 2 and the cutting piece 2 to return to the initial state relative to the carrier 3. When the connection structure is switched to the connection state, the winding needle 1 drives the cutting piece 2 to rotate from the initial position to the first direction until it rotates to the final position, and then the connection structure is switched to the disconnection state, and the return structure drives the cutting piece 2 to rotate back relative to the carrier 3 (i.e., rotate in the opposite direction of the first direction) until it rotates to the initial position. By setting the return structure, the cutting piece can be automatically reset initially, which is conducive to repeated use, without manual adjustment, saving time and effort.

[0097] The return structure includes a first limiter 35, a second limiter and an elastic member 36, wherein the first limiter 35 is arranged on the carrier 3, the second limiter is arranged on the rotating ring 31 (or the cutting member 2), and the elastic member 36 connects the rotating ring 31 (or the cutting member 2) and the carrier 3, and can drive the rotating ring 31 (or the cutting member 2) to rotate relative to the carrier 3, so that the first limiter 35 limits the second limiter in the initial state. For example, the first limiter 35 is set as a convex block, the second limiter is set as the outer shell of the fourth driving member 32, and the fourth driving member 32 is limited by the contact with the convex block, and the elastic member 36 is set as a spring. When the connecting structure switches to the connected state, the winding needle 1 drives the rotating ring 31 and the cutting piece 2 to rotate from the initial position to the first direction. At this time, the elastic member 36 begins to deform and accumulate potential energy; then the connecting structure switches to the disconnected state, the elastic member 36 restores the potential energy and drives the rotating ring 31 and the cutting piece 2 to rotate back relative to the supporting member 3 (that is, rotate in the opposite direction of the first direction) until the first limit member 35 and the second limit member abut to return to the initial position.

[0098] Since the movement direction of the cutting piece 2 is arc-shaped, an arc-shaped guide rod is provided on the bearing piece 3, and the spring is sleeved in the arc-shaped guide rod to form an elastic piece 36. The spring can be guided by the arc-shaped guide rod, thereby improving the structural reliability.

[0099] The bearing member 3 is configured in a plate shape, the avoidance groove runs through two opposite side surfaces of the bearing member 3, and the rotating ring 31 is configured inside the avoidance groove, for example, the outer wall of the rotating ring 31 is connected to the inner wall of the avoidance groove. Moreover, the axial dimension of the rotating ring 31 is larger than the axial dimension of the avoidance groove, so that the rotating ring 31 protrudes from two opposite side surfaces of the bearing member, which is conducive to maintaining the connection and rotation stability of the rotating ring 31 relative to the bearing member 3, and is also conducive to the connection of other components (such as the cutting member 2, the second connecting portion 33 and the second limiting member, etc.). Specifically, the cutting member 2 is configured on one side of the rotating ring 31, and the second connecting portion 33 and the second limiting member are configured on the other side of the rotating ring 31.

[0100] It should be noted that the winding needle 1 is divided into a first part and a second part along the axial direction. The first part is used for winding the diaphragm and the pole piece, and the second part is used to connect the first part and the driving power. The radius of the first part is greater than the radius of the second part. The various position settings on the carrier 3 are relative to the second part. For example, the first connecting part 34 is arranged on the outer peripheral surface of the second part, and the avoidance groove and the avoidance notch are used for the second part to extend into, and so on.

[0101] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0102] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0103] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0104] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0105] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0106] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A battery cell winding device, characterized in that: include: roll The needle is in the winding position and can rotate continuously; A cutting piece, arranged on the radial side of the winding needle, provided with a cutter for cutting off the diaphragm; A first driving member is connected to the cutting member in a transmission manner and is capable of driving the cutting member to approach the winding needle so that the cutting member and the winding needle are respectively located on two sides of the diaphragm; The second driving member is connected to the cutting member in driving connection, and can drive the cutting member to rotate around the axis of the winding needle, and the cutting member and the winding needle have the same rotation angular velocity; the cutting knife is located on the front side of the cutting member so as to be able to cut off the diaphragm detached from the winding needle.

2. The battery cell winding device according to claim 1, characterized in that: The first driving member can drive the cutting member to move along the axial direction of the winding needle so as to approach and move away from the winding needle; And / or, the first driving member can drive the cutting member to move radially along the winding needle so as to approach and move away from the winding needle.

3. The battery cell winding device according to claim 1, characterized in that: include: A third driving member is connected to the cutting member in a transmission manner and is capable of driving the cutting member to move along the axial direction of the winding needle so as to be drawn out from the diaphragm; The first driving member can drive the cutting member to press the diaphragm onto the outer peripheral surface of the winding needle, and driven by the second driving member, the cutting member can wind the diaphragm onto the winding needle.

4. The battery cell winding device according to claim 3, characterized in that: The cutter is telescopically connected to the cutting piece so as to be hidden relative to the cutting piece after the diaphragm is cut off.

5. The battery cell winding device according to claim 3, characterized in that: The outer peripheral surface of the winding needle is provided with a pressing groove for the cutting piece to be at least partially embedded, and the first driving member can drive the cutting piece to press the diaphragm into the pressing groove.

6. The battery cell winding device according to claim 3, characterized in that: The cutting piece is provided with a blowing area, and the blowing area is close to the winding needle.

7. The battery cell winding device according to claim 6, characterized in that: An air guide channel is arranged inside the cutting piece, and a plurality of air blowing holes are arranged in the air blowing area, and the plurality of air blowing holes are communicated with the air guide channel.

8. The battery cell winding device according to claim 1, characterized in that: The cutting piece is arranged in a strip shape and extends along the axial direction of the winding needle.

9. The battery cell winding device according to claim 1, characterized in that: include: The pressure roller is arranged on the radial side of the winding needle, can rotate along its own axis, and can be close to the winding needle to press the diaphragm against the outer peripheral surface of the winding needle.

10. The battery cell winding device according to claim 1, characterized in that: include: A carrier, capable of being displaced relative to the winding needle under the drive of the first driving member; Wherein, the cutting member is connected to the supporting member, and can be rotated relative to the supporting member around the axis of the winding needle under the drive of the second driving member.

11. The battery cell winding device according to claim 10, characterized in that: include: A rotating ring, connected to the carrier, capable of rotating along its own axis relative to the carrier, and capable of being sleeved on the outer side of the winding needle; Wherein, the cutting piece is connected to the supporting piece through the rotating ring.

12. The battery cell winding device according to claim 11, characterized in that: The carrier is rotatably connected to a plurality of rollers, which are arranged around the outer circumference of the rotating ring and are transmission-connected to the rotating ring; the second driving member is configured as a rotating driving member and is transmission-connected to at least one of the plurality of rollers.

13. The battery cell winding device according to claim 11, characterized in that: The second driving member comprises: A connecting structure connects the rotating ring and the winding needle and is capable of switching between a connected state and a disconnected state; when the connecting structure is in the connected state, the rotating ring rotates synchronously with the winding needle relative to the supporting member, and when the connecting structure is in the disconnected state, the winding needle rotates relative to the rotating ring and the supporting member.

14. The battery cell winding device according to claim 13, characterized in that: The connection structure comprises: A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle; The second connection part is arranged on the rotating ring and can be displaced to the rotating path of the first connection part, so that the first connection part can drive the second connection part and the rotating ring to rotate synchronously.

15. The battery cell winding device according to claim 13, characterized in that: include: The return structure is arranged on the rotating ring and the bearing member, and can drive the rotating ring to return to an initial position relative to the bearing member.

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