Winding needle mechanism and battery winding machine

Abstract

The utility model relates to a winding needle mechanism and a battery winding machine. The winding needle mechanism comprises a base, two needle bodies and a driving assembly. The base comprises a first strip-shaped groove extending in the first direction, and the two needle bodies are inserted into the first strip-shaped groove. The driving assembly is arranged on the base, connected with at least one needle body and used for driving the connected needle body to move along the first strip-shaped groove so as to change the relative positions of the two needle bodies in the first direction. According to the technical scheme, in actual application, the driving assembly can be controlled to drive the connected needle bodies to move along the first strip-shaped groove according to the width of the bare battery cell needing to be prepared, so that the relative positions of the two needle bodies are changed in the first direction. Thus, when the winding needle mechanism is applied to the winding machine, the winding machine does not need to be provided with multiple sets of winding needle mechanisms, naked battery cells with various width sizes can be wound and prepared only by arranging one set of winding needle mechanism, and the configuration cost of the winding machine can be greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a winding needle mechanism and a battery winding machine. Background Art

[0002] Lithium batteries mainly have two structures: stacked and wound. The production process of wound lithium batteries is simple and has high production efficiency. Manufacturers generally adopt the winding process to produce lithium batteries. When winding lithium batteries, a winding needle mechanism is required to achieve the winding of bare cells. Corresponding to bare cells of different widths, winding needle mechanisms of corresponding widths are required. Often, one battery winding machine is required to match multiple sets of winding needle mechanisms, resulting in a high configuration cost for the battery winding machine. Therefore, it is necessary to provide a winding needle mechanism that can match the production of bare cells of different widths to reduce the configuration cost of the battery winding machine. Utility Model Content

[0003] Based on this, the present application provides a winding needle mechanism and a battery winding machine, wherein the winding needle mechanism can match the preparation of bare battery cells of different width sizes, thereby reducing the configuration cost of the battery winding machine.

[0004] In a first aspect, the present application provides a needle winding mechanism, the needle winding mechanism comprising:

[0005] A base, comprising a first strip-shaped groove extending along a first direction;

[0006] Two needle bodies are both inserted into the first strip-shaped groove; and

[0007] The driving assembly is arranged on the base and connected to at least one of the needle bodies, and is used to drive the connected needle body to move along the first strip groove to change the relative positions of the two needle bodies in the first direction.

[0008] In some embodiments, the driving assembly includes a telescopic portion and a connecting portion, and the connecting portion is connected to at least one of the needle bodies;

[0009] The telescopic portion is connected to the connecting portion and is telescopically arranged along the first direction, and can drive the needle body connected to the connecting portion to move along the first strip groove to change the relative positions of the two needle bodies in the first direction.

[0010] In some embodiments, the telescopic portion includes a power member, a transmission structure and two moving rods, and the two moving rods are respectively connected to the two needle bodies via the connecting portion;

[0011] The power member is connected to the two moving rods via the transmission structure, and is used to drive the two moving rods to move synchronously in opposite directions along the first direction, so as to drive the two needle bodies to move relatively along the first strip groove.

[0012] In some embodiments, the power member includes a rotating drive shaft, which is rotatably arranged around an axis intersecting the first direction, and the rotating drive shaft is connected to the two moving rods via the transmission structure to drive the two moving rods to move synchronously in opposite directions.

[0013] In some embodiments, the transmission structure includes a driving gear and a driven rack that are meshed with each other, the driving gear is arranged on the rotating drive shaft, and each of the moving rods is provided with a driven rack.

[0014] In some embodiments, the power member further includes an operating knob, wherein the operating knob is connected to the rotary drive shaft and is used to drive the rotary drive shaft to rotate under the control of an external force.

[0015] In some embodiments, the base further includes a second strip groove extending along the first direction, the second strip groove is connected to the first strip groove, and the opening directions of the second strip groove and the first strip groove are intersecting;

[0016] The driving assembly includes a connecting portion for connecting with the needle body, and the connecting portion passes through the second strip groove and is connected with the needle body located in the first strip groove.

[0017] In some embodiments, a mounting portion is provided on the base, and the needle winding mechanism is mounted on the external structure via the mounting portion.

[0018] In some embodiments, the base includes a first base body and a second base body, both of which are provided with the first strip-shaped groove;

[0019] One of the needle bodies is inserted into the first strip groove of the first seat body, and the other of the needle bodies is inserted into the first strip groove of the second seat body;

[0020] The driving assembly is used to drive the two needles to move along the first strip grooves.

[0021] In a second aspect, the present application provides a battery winding machine, comprising the winding needle mechanism described in the above embodiment.

[0022] In actual application, the above-mentioned needle winding mechanism and battery winding machine can control the drive assembly to drive the connected needle body to move along the first strip groove according to the width of the bare battery cell to be prepared, so that the relative positions of the two needle bodies change in the first direction. In this way, when the needle winding mechanism is applied to the winding machine, the winding machine does not need to be equipped with multiple sets of needle winding mechanisms. Only one set of needle winding mechanism is required to be equipped to wind and prepare bare batteries of various widths and sizes, which can greatly reduce the configuration cost of the winding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 Schematic diagram of the structure of the needle winding mechanism of some embodiments.

[0025] Figure 2 for Figure 1 A schematic diagram of the cooperation between the base and the needle body in the needle winding mechanism is shown.

[0026] Figure 3 for Figure 1 A schematic front view of the drive assembly in the needle winding mechanism shown.

[0027] Figure 4 for Figure 3 A left side schematic diagram of the drive assembly is shown.

[0028] Figure 5 for Figure 3 A schematic diagram of the cooperation between the transmission structure and the moving rod in the driving assembly is shown.

[0029] The reference numerals in the specific implementation manner are as follows:

[0030] 100, needle winding mechanism; 10, base; T1, first strip groove; T2, second strip groove; 11, first seat body; 12, second seat body; 13, mounting portion; X, first direction; 20, needle body; 21, connecting hole; 30, driving assembly; 31, telescopic portion; 31a, power part; a1, rotating driving shaft; a2, operating knob; 31b, transmission structure; b1, driving gear; b2, driven rack; 31c, moving rod; 32, connecting portion; 32a, protrusion. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, if any, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0033] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if any, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, if it appears, unless otherwise clearly specified and limited, a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that, if present, 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] In response to the problem of high configuration cost of battery winding machines mentioned in the background technology, the present application provides a winding needle mechanism and a battery winding machine.

[0038] The battery winding machine in the embodiment of the present application is a machine that assembles positive electrode sheets, negative electrode sheets and diaphragms into bare battery cells in a continuously rotating manner. Usually, the battery winding machine is equipped with a positive electrode sheet unwinding mechanism, a negative electrode sheet unwinding mechanism, a diaphragm unwinding mechanism and a winding needle mechanism. The winding needle mechanism is used to wind the positive electrode sheet unwinded by the positive electrode sheet unwinding mechanism, the negative electrode sheet unwinded by the negative electrode sheet unwinding mechanism, and the diaphragm unwinded by the diaphragm unwinding mechanism together to form a bare battery cell. In addition, the battery winding machine can also be equipped with a correction mechanism for correcting the deviation of the electrode sheet, a tension control mechanism for controlling the tension of the electrode sheet tape, etc. Regarding the specific working principle and structure of the battery winding machine, please refer to the conventional settings in this field.

[0039] The needle winding mechanism provided in the embodiment of the present application is described in detail below.

[0040] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a needle winding mechanism 100, comprising a base 10, two needle bodies 20 and a driving assembly 30. The base 10 comprises a first strip groove T1 extending along a first direction X, and the two needle bodies 20 are both inserted into the first strip groove T1. The driving assembly 30 is disposed on the base 10 and connected to at least one needle body 20, and is used to drive the connected needle body 20 to move along the first strip groove T1 to change the relative positions of the two needle bodies 20 in the first direction X.

[0041] The first direction X is the extension direction of the first strip groove T1. Usually, the first strip groove T1 extends in a straight line along the first direction X. The first strip groove T1 has a groove depth direction perpendicular to its extension direction, and one end of the groove depth direction is open as its opening. Parts of the two needle bodies 20 are inserted into the first strip groove T1 through the opening of the first strip groove T1, and the remaining parts of the two needle bodies 20 extend out of the first strip groove T1 to cooperate with the winding pole piece and the diaphragm. It can be understood that the first strip groove T1 can limit and guide the movement of the needle body 20 to a certain extent, so that the movement of the needle body 20 is more stable and reliable.

[0042] Each needle body 20 is roughly in the shape of a long strip, and its extension direction roughly corresponds to the groove depth direction of the first strip groove T1. The cross-sectional shape of each needle body 20 can be circular, square, elliptical, semicircular, diamond or other special shapes, which is set according to actual needs. The spacing between the two needle bodies 20 in the first direction X is positively correlated with the width of the bare battery cell. The larger the width of the bare battery cell, the larger the spacing between the two needle bodies 20 in the first direction X.

[0043] The driving assembly 30 is connected to at least one needle body 20 and is used to drive the connected needle body 20 to move along the first strip groove T1 to change the spacing between the two needle bodies 20 in the first direction X to adapt to the width of the bare battery cell to be prepared.

[0044] Specifically, the drive assembly 30 can only drive one of the needle bodies 20 to move, while the other needle body 20 is fixedly inserted in the first strip groove T1. Specifically, the drive assembly 30 can also drive both needle bodies 20 to move along the first strip groove T1 at the same time, as long as the relative positions of the two needle bodies 20 along the first direction X change.

[0045] In actual application, the needle winding mechanism 100 can control the driving assembly 30 to drive the connected needle body 20 to move along the first strip groove T1 according to the width of the bare battery cell to be prepared, so that the relative positions of the two needle bodies 20 in the first direction X change. In this way, when the needle winding mechanism 100 is applied to a winding machine, the winding machine does not need to be equipped with multiple sets of needle winding mechanisms 100. Only one set of needle winding mechanism 100 can be equipped to wind and prepare bare batteries of various widths, which can greatly reduce the configuration cost of the winding machine.

[0046] In some embodiments, reference Figure 1 The driving assembly 30 includes a telescopic portion 31 and a connecting portion 32, and the connecting portion 32 is connected to at least one needle body 20. The telescopic portion 31 is connected to the connecting portion 32 and is telescopically arranged along the first direction X, and can drive the needle body 20 connected to the connecting portion 32 to move along the first strip groove T1 to change the relative positions of the two needle bodies 20 in the first direction X.

[0047] The number of the connecting portion 32 can be one or two. When the number of the connecting portion 32 is one, the connecting portion 32 is connected to one of the needle bodies 20, and the other needle body 20 is fixedly inserted in the first strip groove T1. The telescopic portion 31 drives one needle body 20 to move during the telescopic process through the connecting portion 32, thereby causing the two needle bodies 20 to change position in the first direction X. At this time, the telescopic portion 31 may include a one-way telescopic cylinder.

[0048] When there are two connecting parts 32, the two connecting parts 32 are connected to the two needle bodies 20 one by one, and the telescopic part 31 can drive the two needle bodies 20 to move along the first strip groove T1 through the connecting parts 32, thereby changing the relative positions of the two needle bodies 20 in the first direction X. At this time, the telescopic part 31 may include a bidirectional telescopic cylinder.

[0049] It is understandable that when the two needle bodies 20 move along the first strip groove T1, they can move in the same direction but at different speeds, or in opposite directions, depending on the structure of the telescopic part 31, as long as the two needle bodies 20 can be relatively displaced in the first direction X.

[0050] At this time, the relative positions of the two needle bodies 20 in the first direction X are changed by the cooperation of the telescopic portion 31 and the connecting portion 32 . The driving structure is simple and easy to implement.

[0051] In some embodiments, reference Figure 3 , Figure 4 and Figure 5 The telescopic portion 31 includes a power member 31a, a transmission structure 31b and two moving rods 31c, and the two moving rods 31c are respectively connected to the two needle bodies 20 via the connecting portion 32. The power member 31a is connected to the two moving rods 31c via the transmission structure 31b, and is used to drive the two moving rods 31c to move synchronously in opposite directions along the first direction X, so as to drive the two needle bodies 20 to move relatively along the first strip groove T1.

[0052] Understandably, there are two connecting parts 32. The two moving rods 31c are connected to the two needle bodies 20 in a one-to-one correspondence through the two connecting parts 32, and can independently drive the two needle bodies 20 to move.

[0053] At this time, one power member 31a can simultaneously drive the two moving rods 31c to move in the opposite direction along the first direction X under the transmission of the transmission structure 31b, and further drive the two needle bodies 20 to move in the opposite direction along the first strip groove T1.

[0054] In this way, not only the structure of the driving assembly 30 is simplified, but also the two needle bodies 20 move in opposite directions to change the relative positions, which can shorten the adjustment time of the needle winding mechanism 100 and improve the production efficiency of the winding machine.

[0055] Specifically in the embodiment, refer to Figure 4 The power member 31a includes a rotation drive shaft a1, which is rotatably arranged around an axis intersecting the first direction X. The rotation drive shaft a1 is connected to the two moving rods 31c via the transmission structure 31b to drive the two moving rods 31c to move synchronously in opposite directions.

[0056] The axis of the rotation driving shaft a1 is substantially perpendicular to the first direction X. When the rotation driving shaft a1 rotates around its own axis under the action of an external force, the two moving rods 31c are driven to move through the transmission structure 31b.

[0057] Regarding the specific structure of the transmission structure 31b, as an example, the transmission structure 31b may include a synchronous belt running along a first direction X, wherein one moving rod 31c is connected to one side of the synchronous belt, and the other moving rod 31c is connected to the other side of the synchronous belt, and when the rotating drive shaft a1 rotates, the moving directions of the two sides of the synchronous belt are opposite, thereby driving the two moving rods 31c to move in opposite directions.

[0058] At this time, the two moving rods 31c are driven to move in opposite directions in the first direction X by the rotating driving shaft a1 in cooperation with the transmission structure 31b. The space required by the power member 31a is smaller, which helps to improve the compactness of the needle winding mechanism 100 and makes it easier to layout the needle winding mechanism 100 on the winding machine.

[0059] In a further embodiment, referring to Figure 5 The transmission structure 31b includes a driving gear b1 and a driven rack b2 that are meshed with each other. The driving gear b1 is arranged on the rotating drive shaft a1, and each moving rod 31c is provided with a driven rack b2.

[0060] Understandably, the two moving rods 31c are arranged on both sides of the first direction X, and the driven rack b2 on each moving rod 31c extends along the first direction X. When the rotating drive shaft a1 is rotated, the driving gear b1 rotates accordingly, thereby driving the driven racks b2 on the two moving rods 31c to move in the opposite direction.

[0061] At this time, the transmission structure 31b adopts a structural mode in which the driving gear b1 and the driven rack b2 are meshed, which not only has reliable transmission but also has a compact structure, and can simplify the structure of the needle winding mechanism 100.

[0062] Specifically in the embodiment, refer to Figure 5 The power member 31a further includes an operating knob a2, which is connected to the rotation drive shaft a1 and is used to drive the rotation drive shaft a1 to rotate under the control of an external force.

[0063] The operating knob a2 is a structure for the operator to operate. When the operator rotates the operating knob a2, the rotating drive shaft a1 can be driven to rotate. In this way, the needle winding mechanism 100 uses a manual operation method to adjust the distance between the two needle bodies 20, which can greatly reduce the cost of the mechanism.

[0064] Of course, in other embodiments, the power member 31a may also include a rotary motor, and the rotary drive shaft a1 is driven to rotate by the electric power of the rotary motor.

[0065] It should be noted that the structural scheme of the drive assembly 30 driving the needle body 20 to move is not limited to the structural scheme of the telescopic portion 31. For example, in other embodiments, the drive assembly 30 includes a guide rail, a pulley and a motor, the motor drives the pulley to roll along the guide rail, the pulley is connected to the needle body 20 through the connecting portion 32, and when the pulley rolls, the needle body 20 is driven to move along the first strip groove T1 through the connecting portion 32.

[0066] In some embodiments, reference Figure 1 and Figure 2 The base 10 further includes a second strip groove T2 extending along the first direction X, the second strip groove T2 is connected to the first strip groove T1, and the opening directions of the two are arranged to intersect. The driving assembly 30 includes a connecting portion 32 for connecting with the needle body 20, the connecting portion 32 passes through the second strip groove T2 and is connected to the needle body 20 located in the first strip groove T1.

[0067] The second strip groove T2 extends parallel to the first strip groove T1, and the two open in different directions. The opening direction of the second strip groove T2 corresponds to its groove depth direction, and the intersection of the opening directions of the two indicates that the groove depth directions of the two intersect. It can be understood that the groove depth direction of the strip groove is perpendicular to its extension direction.

[0068] In a specific state, the opening direction of the first strip groove T1 can be a horizontal direction perpendicular to the first direction X (ie, the first strip groove T1 is horizontally opened), and the opening direction of the second strip groove T2 can be a vertical direction perpendicular to the first direction X (ie, the second strip groove T2 is vertically opened).

[0069] The driving assembly 30 is connected to the needle body 20 via a connecting portion 32. In one embodiment, the connecting portion 32 is connected to the telescopic portion 31 mentioned above, and the connecting portion 32 drives the connected needle body 20 to move under the drive of the telescopic portion 31. Of course, the connecting portion 32 can also drive the connected needle body 20 to move under the drive of other power, such as the pulley mentioned above.

[0070] The second strip groove T2 is connected to the first strip groove T1, so that the connecting portion 32 can be connected to the needle body 20 part in the first strip groove T1 after passing through the second strip groove T2. Figure 4 As shown, a protrusion 32a is formed on the connecting portion 32, and the protrusion 32a is connected to the needle body 20 located in the first strip groove T1 after passing through the second strip groove T2. The protrusion 32a and the needle body 20 can be fastened, snap-fitted, or bonded. The protrusion 32a can move along the second strip groove T2 under the drive of the driving assembly 30, thereby driving the needle body 20 to move.

[0071] At this time, the connecting portion 32 is penetrated by the second strip groove T2 , and the second strip groove T2 can guide the connecting portion 32 to move linearly along itself, thereby guiding the movement of the needle body 20 and improving the movement stability of the needle body 20 .

[0072] The connection portion 32 and the needle body 20 may be detachably connected, so that the needle body 20 can be easily assembled and disassembled into the first strip groove T1. Specifically, the needle body 20 is provided with a connection hole 21, and the protrusion 32a on the connection portion 32 may be detachably engaged in the connection hole 21, or a fastener may be provided through the protrusion 32a and detachably fastened to the connection hole 21.

[0073] In some embodiments, reference Figure 2 The base 10 is provided with a mounting portion 13, and the needle winding mechanism 100 is mounted on the external structure via the mounting portion 13. In actual application, the needle winding mechanism 100 is mounted on the winding machine through the base 10. The mounting portion 13 on the base 10 can be a mounting hole, a mounting column, a mounting claw, etc., as long as it can be fixedly connected to the winding machine, and the specific structure is not limited.

[0074] In some embodiments, reference Figure 2 The base 10 includes a first base body 11 and a second base body 12, both of which are provided with a first strip groove T1. One of the needle bodies 20 is inserted into the first strip groove T1 of the first base body 11, and the other needle body 20 is inserted into the first strip groove T1 of the second base body 12. The driving assembly 30 is used to drive the two needle bodies 20 to move along the first strip groove T1.

[0075] Typically, the first base 11 and the second base 12 are fixedly connected, for example, by screw fastening. The projections of the first strip groove T1 on the first base 11 and the first strip groove T1 on the second base 12 along the first direction X overlap, and are arranged at intervals in the first direction X. Specifically, the driving assembly 30 can drive each needle body 20 to move along the first strip groove T1 where it is located through two moving rods 31c.

[0076] When the needle winding mechanism 100 is transported, the two seat bodies of the base 10 can be transported independently, which makes transportation more convenient.

[0077] In addition, the mounting portion 13 can be provided on both the first seat body 11 and the second seat body 12, so that the base 10 can be more stably installed on the winding machine. The first seat body 11 and the second seat body 12 can be symmetrically arranged relative to a plane perpendicular to the first direction X, the winding needle mechanism 100 has a symmetrical and beautiful structure, and the winding machine is more evenly stressed. The second strip groove T2 mentioned above can be provided on both the first seat body 11 and the second seat body 12.

[0078] In other embodiments, the base 10 may be an integral structure, with only one first strip groove T1 being provided on the base 10, and the two needle bodies 20 moving in the same first strip groove T1; or two independent first strip grooves T1 may be provided on the base 10, and the two first strip grooves T1 are arranged at intervals in the first direction X, and the two needle bodies 20 are inserted into the two first strip grooves T1 one by one.

[0079] In a specific embodiment of the present application, the needle winding mechanism 100 includes a base 10, two needle bodies 20 and a driving assembly 30. The base 10 includes two first strip grooves T1 extending along a first direction X. The two first strip grooves T1 are arranged at intervals in the first direction X, and the projections along the first direction X overlap. The two needle bodies 20 are respectively inserted into the two first strip grooves T1. The driving assembly 30 includes an operating knob a2, a rotating drive shaft a1 and two moving rods 31c. The output end of the rotating drive shaft a1 is provided with a driving gear b1. The two moving rods 31c are arranged on both sides of the rotating drive shaft a1, and are each provided with a driven rack b2 meshing with the driving gear b1. Each moving rod 31c is connected to a needle body 20 through a connecting portion 32. A second strip groove T2 extending along the first direction X is provided on the base 10. The second strip groove T2 is connected to the first strip groove T1, and the opening directions of the two intersect. The connecting portion 32 passes through the second strip groove T2 and is connected to the part of the needle body 20 located in the first strip groove T1.

[0080] When the width of the bare battery cell needs to be adjusted, the staff can rotate the operation to drive the rotating drive shaft a1 to rotate, and then realize the reverse movement of the two moving rods 31c in the first direction X through the driving gear b1 and the driven rack b2, thereby driving the two needle bodies 20 to change their relative positions along the first strip groove T1.

[0081] In addition, the embodiment of the present application further provides a winding machine, which includes the winding needle mechanism 100 in the above embodiment, and has all the beneficial effects in the above embodiment.

[0082] Specifically in the embodiment, a rotary drive mechanism is provided on the winding machine, and the needle winding mechanism 100 is installed on the rotary drive mechanism through the base 10. The rotary drive mechanism can drive the needle winding mechanism 100 to rotate around an axis perpendicular to the first direction X to wind the pole piece and the diaphragm. The rotary drive mechanism can include a rotary motor.

[0083] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A needle winding mechanism, characterized in that: The needle winding mechanism comprises: A base (10) comprising a first strip-shaped groove (T1) extending along a first direction (X); Two needle bodies (20) are both inserted into the first strip-shaped groove (T1); and A driving assembly (30) is disposed on the base (10) and connected to at least one of the needle bodies (20), and is used to drive the connected needle body (20) to move along the first strip groove (T1) to change the relative positions of the two needle bodies (20) in the first direction (X).

2. The needle winding mechanism according to claim 1, characterized in that: The driving assembly (30) comprises a telescopic portion (31) and a connecting portion (32), wherein the connecting portion (32) is connected to at least one of the needle bodies (20); The telescopic portion (31) is connected to the connecting portion (32) and is telescopically arranged along the first direction (X), and is capable of driving the needle body (20) connected to the connecting portion (32) to move along the first strip groove (T1) to change the relative positions of the two needle bodies (20) in the first direction (X).

3. The needle winding mechanism according to claim 2, characterized in that: The telescopic portion (31) comprises a power piece (31a), a transmission structure (31b) and two moving rods (31c), and the two moving rods (31c) are respectively connected to the two needle bodies (20) via the connecting portion (32); The power member (31a) is connected to the two moving rods (31c) via the transmission structure (31b) and is used to drive the two moving rods (31c) to move synchronously in opposite directions along the first direction (X), so as to drive the two needle bodies (20) to move relative to each other along the first strip groove (T1).

4. The needle winding mechanism according to claim 3, characterized in that: The power member (31a) comprises a rotating drive shaft (a1), which is rotatably arranged around an axis intersecting the first direction (X), and the rotating drive shaft (a1) is connected to the two moving rods (31c) via the transmission structure (31b) to drive the two moving rods (31c) to move synchronously in opposite directions.

5. The needle winding mechanism according to claim 4, characterized in that: The transmission structure (31b) comprises a driving gear (b1) and a driven rack (b2) meshing with each other, the driving gear (b1) is arranged on the rotating drive shaft (a1), and each of the moving rods (31c) is provided with a driven rack (b2).

6. The needle winding mechanism according to claim 4, characterized in that: The power member (31a) further comprises an operating knob (a2), wherein the operating knob (a2) is connected to the rotating drive shaft (a1) and is used to drive the rotating drive shaft (a1) to rotate under the control of an external force.

7. The needle winding mechanism according to any one of claims 1 to 6, characterized in that: The base (10) further comprises a second strip groove (T2) extending along the first direction (X), the second strip groove (T2) being connected to the first strip groove (T1), and the opening directions of the two are arranged to intersect; The driving assembly (30) comprises a connecting portion (32) for connecting to the needle body (20); the connecting portion (32) passes through the second strip-shaped groove (T2) and is connected to the needle body (20) located in the first strip-shaped groove (T1).

8. The needle winding mechanism according to any one of claims 1 to 6, characterized in that: The base (10) is provided with a mounting portion (13), and the needle winding mechanism is mounted on the external structure via the mounting portion (13).

9. The needle winding mechanism according to any one of claims 1 to 6, characterized in that: The base (10) comprises a first base body (11) and a second base body (12), both of which are provided with the first strip-shaped groove (T1); One of the needle bodies (20) is inserted into the first strip groove (T1) of the first base body (11), and the other of the needle bodies (20) is inserted into the first strip groove (T1) of the second base body (12); The driving assembly (30) is used to drive the two needle bodies (20) to move along the first strip-shaped groove (T1) where they are located.

10. A battery winding machine, characterized in that: It comprises a needle winding mechanism as described in any one of claims 1 to 9.

Images