Needle winding mechanism and winding device with variable winding diameter

Abstract

The present invention discloses a winding needle mechanism and a winding device with a variable winding diameter, which relate to the field of battery production technology. The winding needle mechanism with a variable winding diameter includes a winding needle assembly and a thimble assembly. The winding needle assembly includes a winding body, a winding needle shell and a diameter-changing adjusting piece. The winding needle shell is slidably connected to the winding body and can slide along the radial direction of the winding body. The diameter-changing adjusting piece is movably connected to the winding body and connected to the winding needle shell. The thimble assembly can drive the diameter-changing adjusting piece to move relative to the winding body, thereby driving the winding needle shell to slide along the radial direction of the winding body through the diameter-changing adjusting piece. The winding needle mechanism and the winding device with a variable winding diameter have the characteristic of being able to adjust the winding diameter.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a winding needle mechanism and a winding device with a variable winding diameter. Background Art

[0002] During lithium battery production, the winding machine's needle mechanism winds the separator and positive and negative electrode sheets to form a cell. The needle's winding diameter is related to the alignment of the electrode tabs and the size of the cell, directly affecting the quality of the cell. However, the existing needle mechanism is difficult to adjust.

[0003] In view of this, it is particularly important to develop and design a variable diameter winding needle mechanism and winding device that can solve the above technical problems. Summary of the Invention

[0004] The object of the present invention is to provide a variable diameter winding needle mechanism and a winding device, which have the characteristic of being able to adjust the winding diameter.

[0005] The present invention provides a technical solution:

[0006] In a first aspect, an embodiment of the present invention provides a needle winding mechanism with a variable winding diameter, which includes a needle winding assembly and an ejector assembly;

[0007] The winding needle assembly includes a winding body, a winding needle housing, and a diameter-changing adjusting member. The winding needle housing is slidably connected to the winding body and can slide along the radial direction of the winding body. The diameter-changing adjusting member is movably connected to the winding body and connected to the winding needle housing.

[0008] The ejector assembly can drive the diameter-changing adjusting member to move relative to the winding body, thereby driving the winding needle housing to slide along the radial direction of the winding body through the diameter-changing adjusting member.

[0009] In combination with the first aspect, in a first implementation of the first aspect, the winding needle assembly further includes a clamping member, the clamping member being slidably connected to the winding body and capable of sliding along a radial direction of the winding body, and the diameter-changing adjusting member is also connected to the clamping member;

[0010] When the diameter-changing adjusting member moves relative to the winding body, it can also drive the clamping member to slide in the radial direction of the winding body to clamp or release the diaphragm through the clamping member, and when the clamping member clamps the diaphragm, the winding needle housing slides in the radial direction of the winding body away from the rotation axis of the winding body, and when the clamping member releases the diaphragm, the winding needle housing slides in the radial direction of the winding body toward the rotation axis of the winding body.

[0011] In combination with the first aspect and the above-mentioned implementation manner, in a second implementation manner of the first aspect, the diameter-variable adjusting member is slidably connected to the winding body and is capable of sliding along the axial direction of the winding body to movably connect the diameter-variable adjusting member to the winding body;

[0012] One end of the variable diameter adjusting member is a holding end, and the holding end is located at one end of the winding body. The ejector assembly drives the variable diameter adjusting member to slide relative to the winding body by abutting against the holding end, thereby driving the clamping member and the winding needle housing to slide relative to the winding body.

[0013] In combination with the first aspect and the above-mentioned implementation manner, in a third implementation manner of the first aspect, the winding needle housing is provided with a diameter-changing slide groove, the clamping member is provided with a clamping slide groove, and the diameter-changing adjusting member is provided with a diameter-changing sliding portion and a clamping sliding portion;

[0014] The diameter-changing sliding portion is slidably disposed in the diameter-changing sliding groove, and is capable of abutting against the side wall of the diameter-changing sliding groove when the diameter-changing adjusting member moves relative to the winding body, so as to drive the winding needle housing to slide along the radial direction of the winding body;

[0015] The clamping sliding portion is slidably disposed in the clamping slot and can abut against the side wall of the clamping slot when the diameter-changing adjusting member moves relative to the winding body to drive the clamping member to slide along the radial direction of the winding body, thereby clamping or releasing the diaphragm.

[0016] In combination with the first aspect and the above-mentioned implementation manner, in a fourth implementation manner of the first aspect, the clamping chute has a first clamping sliding section, and the diameter-changing chute has a first diameter-changing sliding section;

[0017] The ejector assembly includes an interconnected ejector drive and an ejector rod, wherein the ejector drive can drive the ejector rod to press against the ejector end, so as to drive the variable diameter adjustment member to slide relative to the winding body, and make the variable diameter sliding portion move within the first variable diameter sliding section, and the clamping sliding portion move within the first clamping sliding section, thereby driving the winding needle housing to slide along the radial direction of the winding body away from the rotation axis of the winding body through the variable diameter sliding portion, and at the same time, driving the clamping member to clamp the diaphragm through the clamping sliding portion.

[0018] In combination with the first aspect and the above-mentioned implementation manner, in a fifth implementation manner of the first aspect, the winding needle assembly further includes a reset elastic member, and the reset elastic member is respectively connected to the winding body and the diameter-changing adjustment member;

[0019] The push rod drives the variable diameter adjustment member to slide relative to the winding body in a first direction, while the reset elastic member is elastically deformed, wherein the first direction is the axial direction of the winding body; the holding drive member can also drive the push rod to move in a second direction opposite to the first direction, so as to drive the push rod to release the variable diameter adjustment member, and make the variable diameter adjustment member move in the second direction relative to the winding body under the action of the elastic force of the reset elastic member, so that the variable diameter sliding part drives the winding needle housing to slide along the radial direction of the winding body toward the rotation axis of the winding body, and at the same time, the clamping sliding part drives the clamping member to release the diaphragm.

[0020] In combination with the first aspect and the above-mentioned implementation manner, in a sixth implementation manner of the first aspect, the ejector assembly further includes a centering sleeve and a centering elastic member, and the centering sleeve is connected to the ejection driving member through the centering elastic member;

[0021] A centering portion is provided at the end of the winding body where the supporting end is located, and the supporting drive member can drive the supporting rod to move toward the supporting end while driving the centering sleeve to be sleeved on the centering portion through the centering elastic member, and press the centering sleeve to the centering portion through the centering elastic member.

[0022] In combination with the first aspect and the above-mentioned implementation manner, in a seventh implementation manner of the first aspect, the clamping slide further comprises a second clamping sliding section connected to an end of the first clamping sliding section away from the rotation axis of the winding body, and the second clamping sliding section is parallel to the rotation axis of the winding body;

[0023] The variable diameter sliding groove further comprises a second variable diameter sliding section connected to the first variable diameter sliding section, and the first variable diameter sliding section and the second variable diameter sliding section are collinear;

[0024] When the clamping sliding portion slides in the second clamping sliding section, the diameter-changing sliding portion slides in the second diameter-changing sliding section.

[0025] In combination with the first aspect and the above-mentioned implementation manner, in an eighth implementation manner of the first aspect, the variable-diameter winding needle mechanism further includes a winding head;

[0026] The winding head is connected to one end of the winding body away from the holding end, and can drive the winding body to move in a first direction or a second direction opposite to the first direction, so that the push rod moves relative to the winding body, thereby causing the push rod to drive the diameter-changing adjustment member to slide relative to the winding body, so that the clamping sliding part slides in the second clamping sliding section, wherein the first direction is the axial direction of the winding body.

[0027] In a second aspect, an embodiment of the present invention further provides a winding device comprising the variable diameter winding needle mechanism. The variable diameter winding needle mechanism comprises a winding needle assembly and a thimble assembly; the winding needle assembly comprises a winding body, a winding needle housing, and a diameter-changing adjusting member; the winding needle housing is slidably connected to the winding body and is capable of sliding in the radial direction of the winding body; the diameter-changing adjusting member is movably connected to the winding body and connected to the winding needle housing; the thimble assembly is capable of driving the diameter-changing adjusting member to move relative to the winding body, thereby driving the winding needle housing to slide in the radial direction of the winding body via the diameter-changing adjusting member.

[0028] Compared with the prior art, the variable diameter winding needle mechanism provided by the embodiment of the present invention has the following advantages:

[0029] The variable diameter winding needle mechanism includes a winding needle assembly and a push pin assembly, wherein the winding needle assembly includes a winding body, a winding needle housing, and a variable diameter adjustment member. The winding needle housing is slidably connected to the winding body and is capable of sliding in the radial direction of the winding body, thereby adjusting the distance between the winding needle housing and the rotation axis of the winding body by driving the winding needle housing to slide in the radial direction of the winding body. The variable diameter adjustment member is movably connected to the winding body and the winding needle housing. The push pin assembly is capable of driving the variable diameter adjustment member to move relative to the winding body, thereby driving the winding needle housing to slide in the radial direction of the winding body through the variable diameter adjustment member. In this way, the push pin assembly drives the variable diameter adjustment member, which in turn drives the winding needle housing to slide in the radial direction of the winding body through the variable diameter adjustment member, thereby adjusting the distance between the winding needle housing and the rotation axis of the winding body, thereby changing the winding diameter of the winding needle assembly. This allows the variable diameter winding needle mechanism to adjust the alignment of the electrode tabs on the battery cell and the size of the battery cell by adjusting the winding diameter.

[0030] The beneficial effects of the winding device provided by the embodiment of the present invention relative to the prior art are the same as the beneficial effects of the above-mentioned variable diameter winding needle mechanism relative to the prior art, and will not be repeated here.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for use in the embodiments. It should be understood that the following drawings illustrate only certain embodiments of the present invention and should not be construed as limiting the scope of the present invention. Those skilled in the art can, without inventive effort, derive other relevant drawings from these drawings.

[0033] Figure 1 A schematic diagram of the three-dimensional structure of a needle winding mechanism with a variable winding diameter provided by an embodiment of the present invention.

[0034] Figure 2 A schematic three-dimensional structural diagram of a winding needle assembly of a winding needle mechanism with variable winding diameter provided in an embodiment of the present invention.

[0035] Figure 3 A schematic structural diagram of a needle winding assembly of a needle winding mechanism with variable winding diameter provided by an embodiment of the present invention with the needle winding housing removed.

[0036] Figure 4 A schematic structural diagram of the winding needle assembly of the variable-diameter winding needle mechanism provided by an embodiment of the present invention, with the winding needle housing removed, viewed from another perspective.

[0037] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at V in the middle.

[0038] Figure 6 A schematic structural diagram of a variable diameter winding needle mechanism provided in an embodiment of the present invention from another perspective.

[0039] Figure 7 A schematic cross-sectional view of the docking portion between a winding needle assembly and an ejector pin assembly of a winding needle mechanism with a variable winding diameter provided by an embodiment of the present invention.

[0040] Icons: 10-needle winding mechanism with variable diameter; 11-needle winding assembly; 111-winding body; 1111-centering part; 112-needle winding housing; 1121-needle winding slider; 1122-diameter-changing chute; 1126-first diameter-changing sliding section; 1127-second diameter-changing sliding section; 113-clamping member; 1131-clamping slider; 1132-clamping chute; 1136-first clamping sliding section; 1137-second diameter-changing sliding section Two clamping sliding sections; 114-diameter-changing adjusting member; 1141-holding end; 1142-diameter-changing sliding portion; 1143-clamping sliding portion; 12-thrust needle assembly; 121-holding driving member; 122-thrust rod; 123-centering elastic member; 124-centering sleeve; 13-winding head; 131-needle-pulling driving member; 132-needle-pulling member; A-first direction; B-second direction; C-third direction; D-fourth direction. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "upper," "lower," "inner," "outer," "left," and "right" indicate positions or relationships based on the positions or relationships shown in the figures, or the positions or relationships in which the inventive product is typically placed when in use, or the positions or relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Terms such as "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. Without further constraints, an element defined by the phrase "comprises a..." does not preclude the existence of additional identical elements in the process, method, article or apparatus that includes the element.

[0043] It should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] Example:

[0046] See also Figure 1 , Figure 1 Schematic diagram of the three-dimensional structure of the needle winding mechanism 10 with variable winding diameter provided by an embodiment of the present invention.

[0047] An embodiment of the present invention provides a winding needle mechanism 10 with a variable winding diameter. The winding needle mechanism 10 has the characteristic of being able to adjust the winding diameter. The winding needle mechanism 10 with a variable winding diameter can be applied to battery cell production scenarios such as winding devices. When the winding needle mechanism 10 with a variable winding diameter is applied to a winding device (not shown), the winding drive of the winding device can drive the winding needle assembly 11 of the winding needle mechanism 10 with a variable winding diameter to rotate to perform the work of winding the battery cell. Since the winding device adopts the winding needle mechanism 10 provided by an embodiment of the present invention, the winding device also has the characteristic of being able to adjust the winding diameter.

[0048] The following will specifically introduce the structural composition, working principle and beneficial effects of the variable diameter winding needle mechanism 10 provided by an embodiment of the present invention.

[0049] See also Figure 2 、 Figure 3 and Figure 4 , Figure 2 Schematic diagram of the three-dimensional structure of the winding needle assembly 11 of the winding needle mechanism 10 with variable winding diameter provided by an embodiment of the present invention. Figure 3 This is a schematic structural diagram of the needle winding assembly 11 of the needle winding mechanism 10 with variable winding diameter provided by an embodiment of the present invention, with the needle winding housing 112 removed. Figure 4 A schematic structural diagram of the variable diameter winding needle assembly 11 of the winding needle mechanism 10 provided by the embodiment of the present invention when the winding needle housing 112 is removed from another perspective. Figure 3 , the direction indicated by arrow A is the first direction A, the direction indicated by arrow B is the second direction B, the direction indicated by arrow C is the third direction C, and the direction indicated by arrow D is the fourth direction D, wherein the first direction A is the axial direction of the winding body 111.

[0050] The variable diameter winding needle mechanism 10 includes a winding needle assembly 11 and a top needle assembly 12, wherein the winding needle assembly 11 includes a winding body 111, a winding needle housing 112 and a diameter-changing adjustment member 114, the winding needle housing 112 is slidingly connected to the winding body 111, and the winding needle housing 112 can slide along the radial direction of the winding body 111, so that the distance between the winding needle housing 112 and the rotation axis of the winding body 111 can be adjusted by driving the winding needle housing 112 to slide along the radial direction of the winding body 111. The variable diameter adjusting piece 114 is movably connected to the winding body 111 and is connected to the winding needle housing 112. The ejector needle assembly 12 can drive the variable diameter adjusting piece 114 to move relative to the winding body 111, thereby driving the winding needle housing 112 to slide along the radial direction of the winding body 111 through the variable diameter adjusting piece 114. In this way, the ejector needle assembly 12 drives the variable diameter adjusting piece 114, and then drives the winding needle housing 112 to slide along the radial direction of the winding body 111 through the variable diameter adjusting piece, thereby adjusting the distance between the winding needle housing 112 and the rotation axis of the winding body 111, and then changing the winding diameter of the winding needle assembly 11, so that the variable diameter winding needle mechanism 10 can adjust the alignment of the pole piece and the size of the battery cell by adjusting the winding diameter.

[0051] It should be noted that, in this embodiment, a winding needle slider 1121 is provided on the winding needle housing 112 , the winding needle housing 112 is slidingly connected to the winding body 111 through the winding needle slider 1121 , and the diameter-changing adjusting member 114 is connected to the winding needle slider 1121 .

[0052] Furthermore, the winding needle assembly 11 may also include a clamping member 113, which is slidably connected to the winding body 111 and can slide in the radial direction of the winding body 111, and a diameter-reducing member 114 is also connected to the clamping member 113. When the diameter-reducing member 114 moves relative to the winding body 111 under the drive of the ejector pin assembly 12, it can also drive the clamping member 113 to slide in the radial direction of the winding body 111, so as to clamp or release the diaphragm through the clamping member 113. While the clamping member 113 clamps the diaphragm, the winding needle housing 112 slides in the radial direction of the winding body 111 away from the rotation axis of the winding body 111, thereby increasing the winding diameter of the winding needle assembly 11, so as to adjust the winding diameter of the winding needle assembly 11 while the diaphragm is connected to the winding needle assembly 11. Moreover, when the clamping member 113 releases the diaphragm, the winding needle housing 112 slides along the radial direction of the winding body 111 toward the rotation axis of the winding body 111. While releasing the diaphragm, the winding diameter of the winding needle assembly 11 is reduced, which facilitates the battery cell wound on the winding needle assembly 11 to detach from the winding needle assembly 11, thereby increasing the speed at which the winding needle assembly 11 performs the needle pulling action.

[0053] It should be noted that, in this embodiment, a clamping slider 1131 is provided on the clamping member 113 , the clamping member 113 is slidably connected to the winding body 111 via the clamping slider 1131 , and the diameter-changing adjusting member 114 is connected to the clamping slider 1131 .

[0054] In this embodiment, the winding needle assembly 11 includes two winding needle housings 112, two clamping members 113 and two diameter-changing adjusting members 114. The two winding needle housings 112 are symmetrically arranged with respect to the rotation axis of the winding body 111, the two clamping members 113 are symmetrically arranged with respect to the rotation axis of the winding body 111, and the two diameter-changing adjusting members 114 are symmetrically arranged with respect to the rotation axis of the winding body 111. One diameter-changing adjusting member 114 is grouped with one clamping member 113 and one winding needle housing 112, and they are arranged close to each other. Figure 3 As shown, the ejector assembly 12 is used to simultaneously drive two diameter-reducing adjustment members 114 , and the diameter-reducing adjustment members 114 are used to drive the corresponding winding needle housing 112 and the clamping member 113 to move.

[0055] For example, in Figure 3 In the embodiment, if the ejector assembly 12 drives the two reducing adjustment members 114 to move relative to the winding body 111, the upper reducing adjustment member 114 drives the upper clamping member 113 to move downward along the fourth direction D relative to the winding body 111, so that the clamping member 113 slides toward the rotation axis of the winding body 111, and the upper reducing adjustment member 114 also drives the upper winding needle housing 112 to move upward along the third direction C to slide away from the rotation axis of the winding body 111; at the same time, the lower reducing adjustment member 114 drives the lower The clamping member 113 on the right moves upward along the third direction C relative to the winding body 111, so that the clamping member 113 slides toward the rotation axis of the winding body 111, so that the two clamping members 113 jointly clamp the diaphragm, and the lower diameter-changing adjustment member 114 also drives the lower winding needle housing 112 to move downward along the fourth direction D to slide away from the rotation axis of the winding body 111, thereby achieving the purpose of increasing the winding diameter of the winding needle assembly 11 by driving the two winding needle housings 112 away from the rotation axis of the winding body 111.

[0056] In other embodiments, the number of the winding needle housing 112, the clamping member 113 and the diameter-changing adjusting member 114 in the winding needle assembly 11 may also be one each, and the clamping member 113 may also clamp the diaphragm on the winding body 111. Of course, the number of the winding needle housing 112, the clamping member 113 and the diameter-changing adjusting member 114 in the winding needle assembly 11 may also be other numbers.

[0057] Furthermore, in this embodiment, the diameter reducing member 114 is slidably connected to the winding body 111 and is capable of sliding along the axial direction of the winding body 111, thereby movably connecting the diameter reducing member 114 to the winding body 111, thereby sliding relative to the winding body 111 in the first direction A under the drive of the ejector assembly 12. One end of the diameter reducing member 114 is a holding end 1141, which is located at one end of the winding body 111. The ejector assembly 12 can drive the diameter reducing member 114 to slide relative to the winding body 111 in the first direction A by abutting against the holding end 1141, thereby driving the clamping member 113 and the winding needle housing 112 to slide relative to the winding body 111. Its structure is simple, and when the ejector assembly 12 acts on the supporting end, since the diameter-changing adjustment member 114 extends along the rotation axis of the winding body 111, the force exerted by the ejector assembly 12 on the winding body 111 along the radial direction of the winding body 111 is small or even zero, which does not affect the quality of the battery cell wound by the winding needle assembly 11.

[0058] Please continue reading Figure 3 and Figure 4 , and see Figure 5 , Figure 5 for Figure 3 Enlarged schematic diagram of the structure at V in the middle.

[0059] The winding needle housing 112 is provided with a reducing slot 1122, the clamping member 113 is provided with a clamping slot 1132, and the reducing adjustment member 114 is provided with a reducing sliding portion 1142 and a clamping sliding portion 1143. The reducing sliding portion 1142 is slidably disposed within the reducing slot 1122 and, when the reducing adjustment member 114 moves relative to the winding body 111, abuts against the sidewalls of the reducing slot 1122, thereby driving the winding needle housing 112 to slide radially along the winding body 111. The clamping sliding portion 1143 is slidably disposed within the clamping slot 1132 and, when the reducing adjustment member 114 moves relative to the winding body 111, abuts against the sidewalls of the clamping slot 1132, thereby driving the clamping member 113 to slide radially along the winding body 111, thereby clamping or releasing the diaphragm. By arranging a sliding portion in the slide groove, the diameter-variable adjusting member 114 drives the winding needle housing 112 and the clamping member 113 to move relative to the winding body 111. The structure is simple and can achieve the effect of continuously adjusting the winding diameter.

[0060] It should be noted that, in other embodiments, the diameter-variable adjusting member 114 may also drive the winding needle housing 112 and the clamping member 113 to move relative to the winding body 111 through a gear transmission mechanism or a transmission mechanism.

[0061] Please continue reading Figure 3 and Figure 5 , and see Figure 6 and Figure 7 , Figure 6 A schematic structural diagram of the variable-diameter winding needle mechanism 10 provided in an embodiment of the present invention from another perspective. Figure 7 The cross-sectional view of the connecting portion of the winding needle assembly 11 and the ejector assembly 12 of the variable diameter winding needle mechanism 10 provided by the embodiment of the present invention is shown. The direction indicated by the arrow A is the first direction A, and the direction indicated by the arrow B is the second direction B.

[0062] The clamping slot 1132 may have a first clamping sliding section 1136, and the reducing slot 1122 may have a first reducing sliding section 1126. The ejector assembly 12 may include a mutually connected ejector drive 121 and an ejector rod 122. The ejector drive 121 can drive the ejector rod 122 to press against the ejector end 1141, so as to drive the reducing adjustment member 114 to slide relative to the winding body 111, and make the reducing sliding portion 1142 move in the first reducing sliding section 1126, and the clamping sliding portion 1143 move in the first clamping sliding section 1136, thereby driving the winding needle housing 112 to slide away from the rotation axis of the winding body 111 in the radial direction of the winding body 111 through the reducing sliding portion 1142, and at the same time, driving the clamping member 113 to clamp the diaphragm through the clamping sliding portion 1143. In other words, Figure 3 Taking the clamping member 113, the reducing adjustment member 114, and the winding needle housing 112 at the top as an example, the holding driving member 121 drives the push rod 122 to move in the first direction A, thereby abutting the holding end 1141 and driving the reducing adjustment member 114 to slide relative to the winding body 111 in the first direction A. The reducing sliding portion 1142 also moves in the first direction A and moves relative to the winding needle housing 112 within the first reducing sliding section 1126. Simultaneously, the clamping sliding portion 1143 also slides in the first direction A and moves relative to the clamping member 113 within the first clamping sliding section 1136. Thus, the reducing sliding portion 1142 drives the winding needle housing 112 to slide in the third direction C of the winding body 111 away from the rotation axis of the winding body 111. Simultaneously, the clamping sliding portion 1143 drives the clamping member 113 to clamp the diaphragm in the fourth direction D. The structure is simple, reliable, and durable.

[0063] Furthermore, the winding needle assembly 11 may further include a reset elastic member (not shown), which is respectively connected to the winding body 111 and the diameter-changing adjusting member 114. When the push rod 122 drives the diameter-changing adjusting member 114 to slide relative to the winding body 111 in the first direction A, the reset elastic member is elastically deformed. The supporting driving member 121 can also drive the top rod 122 to move in a second direction B opposite to the first direction A, so as to drive the top rod 122 to release the diameter-changing adjusting member 114. At this time, the diameter-changing adjusting member 114 will move in the second direction B relative to the winding body 111 under the action of the elastic force of the reset elastic member, so that the diameter-changing sliding portion 1142 drives the winding needle housing 112 to slide along the radial direction of the winding body 111 toward the rotation axis of the winding body 111, and at the same time, the clamping sliding portion 1143 drives the clamping member 113 to release the diaphragm. In this way, when the top needle assembly 12 releases the diameter-changing adjusting member 114, the winding needle assembly 11 automatically completes the action of reducing the winding diameter and releasing the diaphragm under the action of the elastic force of the reset elastic member, so as to further improve the working efficiency of the variable-diameter winding needle mechanism 10.

[0064] Furthermore, the ejector assembly 12 may further include a centering sleeve 124 and a centering elastic member 123, and the centering sleeve 124 is connected to the supporting driving member 121 through the centering elastic member 123. Among them, a centering portion 1111 is provided at one end of the winding body 111 where the supporting end 1141 is located. The supporting driving member 121 can drive the centering sleeve 124 to be sleeved on the centering portion 1111 through the centering elastic member 123 while driving the ejector rod 122 to move toward the supporting end 1141, and press the centering sleeve 124 on the centering portion 1111 through the centering elastic member 123. In other words, when the supporting driving member 121 drives the ejector rod 122 and the centering elastic member 123 to move along the first direction A, the centering sleeve 124 will also be sleeved on the centering portion 1111 driven by the centering elastic member 123 to maintain the position of the winding body 111 stable, and can improve the stability of the winding body 111, and the structure is simple.

[0065] It should be noted that, in this embodiment, when the supporting driving member 121 drives the top rod 122 and the centering elastic member 123 to move along the first direction A, the centering sleeve 124 is first sleeved on the centering portion 1111 under the drive of the centering elastic member 123, and the top rod 122 is then supported on the supporting end 1141, and because the centering sleeve 124 undergoes elastic deformation when it is sleeved on the centering portion 1111, when the supporting driving member 121 drives the top rod 122 and the centering elastic member 123 to move along the second direction B, the top rod 122 first releases the supporting end 1141, and the centering sleeve 124 is then sleeved on the centering portion 1111 under the drive of the centering elastic member 123, so as to further maintain the stability of the winding body 111. In addition, in this embodiment, the centering portion 1111 is annular, the centering sleeve 124 is annular, and is arranged concentrically with the rotation axis of the winding body 111, and the holding end 1141 is located in the centering portion 1111, and the ejector rod 122 extends from the centering sleeve 124 to support the holding end 1141, so that the force exerted by the ejector pin assembly 12 on the winding body 111 is less in the radial direction of the winding body 111, or even zero, so as to further maintain the thermal stability of the winding body 111.

[0066] Please continue reading Figure 5 and Figure 6 The clamping slide 1132 may further include a second clamping slide section 1137 connected to the first clamping slide section 1136. The second clamping slide section 1137 is connected to the end of the first clamping slide section 1136 away from the rotation axis of the winding body 111 and is parallel to the rotation axis of the winding body 111. The reducing slide 1122 may further include a second reducing slide section 1127 connected to the first reducing slide section 1126. The first reducing slide section 1126 and the second reducing slide section 1127 are collinear. When the clamping slide 1143 slides within the second clamping slide section 1137, the reducing slide section 1142 also slides within the second reducing slide section 1127. In other words, when the top rod 122 holds the holding end 1141 and moves along the first direction A, the clamping sliding portion 1143 slides in the first clamping sliding section 1136 and the second clamping sliding section 1137, and since the second clamping sliding section 1137 is parallel to the rotation axis of the winding body 111, when the clamping sliding portion 1143 slides into the second clamping sliding section 1137, the clamping sliding portion 1143 will not drive the clamping member 113 to move in the radial direction of the winding body 111. However, since the second variable diameter sliding section 1127 is colinear with the first variable diameter sliding section 1126, when the variable diameter sliding portion 1142 slides in the second variable diameter sliding section 1127, the variable diameter sliding portion 1142 can still drive the winding needle housing 112 to move in the radial direction of the winding body 111. In this way, the winding needle assembly 11 can adjust the winding diameter while clamping the diaphragm, thereby increasing the efficiency of the battery cell production of the variable diameter winding needle mechanism 10.

[0067] It should be noted that in this embodiment, the first clamping sliding section 1136 and the second clamping sliding section 1137 are two sections of a zigzag bar hole, and the first diameter-changing sliding section 1126 and the second diameter-changing sliding section 1127 are two sections of a straight bar hole. In other embodiments, the first clamping sliding section 1136 and the second clamping sliding section 1137 may also be two sections of a curved bar hole, and the first diameter-changing sliding section 1126 and the second diameter-changing sliding section 1127 may also be two sections of a curved or zigzag bar hole.

[0068] Furthermore, the variable diameter winding needle mechanism 10 may also include a winding head 13. The winding head 13 is connected to the end of the winding body 111 away from the top holding end 1141, and can drive the winding body 111 to move along the first direction A or the second direction B opposite to the first direction A, so that the top rod 122 moves relative to the winding body 111, thereby driving the diameter-changing adjustment member 114 to slide relative to the winding body 111 through the top rod 122, so that the clamping sliding portion 1143 slides within the second clamping sliding section 1137, thereby achieving the purpose of adjusting the winding diameter of the winding needle assembly 11. In other words, the winding head 13 drives the winding needle assembly 11 to move relative to the top rod 122 when the clamping member 113 clamps the diaphragm, so as to achieve the purpose of adjusting the winding diameter of the winding needle assembly 11, and drives the winding needle assembly 11 to clamp or release the diaphragm through the top needle assembly 12, and its control is relatively simple.

[0069] It should be noted that the winding drive member can be connected to the winding head 13 to drive the winding body 111 to rotate through the winding head 13, and the winding head 13 can include a needle pulling drive member 131 and a needle pulling member 132. The needle pulling member 132 is a screw telescopic mechanism and is connected to the winding body 111. The needle pulling drive member 131 drives the winding body 111 to move in the first direction A or the second direction B through the needle pulling member 132. In addition, the winding head 13 can also lock the winding body 111 to limit the movement of the winding body 111 in the first direction A or the second direction B, thereby maintaining the position of the winding body 111 in its own axial direction.

[0070] During the operation of the variable diameter winding needle mechanism 10, before winding, the supporting driving member 121 drives the top rod 122 and the centering elastic member 123 to move along the first direction A, and the centering sleeve 124 is first sleeved on the centering portion 1111 under the drive of the centering elastic member 123, and is pressed on the centering portion 1111 under the action of the centering elastic member 123, and the top rod 122 is then supported on the supporting end 1141, and drives the diameter-changing adjusting member 114 to move along the first direction A. At this time, the diameter-changing adjusting member 114 causes the reset elastic member to undergo elastic deformation, and The reducing sliding portion 1142 on the reducing adjusting member 114 moves in the first reducing sliding section 1126 relative to the winding needle housing 112. At the same time, the clamping sliding portion 1143 also slides along the first direction A and moves in the first clamping sliding section 1136 relative to the winding needle housing 112, thereby driving the winding needle housing 112 to slide away from the rotation axis of the winding body 111 through the reducing sliding portion 1142, so that the winding diameter of the winding needle assembly 11 becomes larger. At the same time, the clamping sliding portion 1143 drives the clamping member 113 to clamp the clamping diaphragm.

[0071] After winding the battery cell, the winding head 13 can drive the winding body 111 to move along the first direction A, so that the top rod 122 moves relative to the winding body 111, thereby driving the diameter-changing adjustment member 114 to slide relative to the winding body 111 through the top rod 122, and the diameter-changing sliding part 1142 slides in the second diameter-changing sliding section 1127, thereby achieving the purpose of increasing the winding diameter of the winding needle assembly 11, and the clamping sliding part 1143 slides in the second clamping sliding section 1137. Since the second clamping sliding section 1137 is parallel to the rotation axis of the winding body 111, when the clamping sliding part 1143 slides into the second clamping sliding section 1137, the clamping part 113 will maintain the posture of clamping the diaphragm. The winding head 13 can also drive the winding body 111 to move along the second direction B, so that the top rod 122 moves relative to the winding body 111, thereby driving the diameter-changing adjustment member 114 to slide relative to the winding body 111 through the top rod 122, and the diameter-changing sliding part 1142 slides in the second diameter-changing sliding section 1127, thereby achieving the purpose of reducing the winding diameter of the winding needle assembly 11, and the clamping sliding part 1143 slides in the second clamping sliding section 1137. Since the second clamping sliding section 1137 is parallel to the rotation axis of the winding body 111, when the clamping sliding part 1143 slides into the second clamping sliding section 1137, the clamping member 113 maintains the posture of clamping the diaphragm.

[0072] When the battery cell is unloaded from the winding needle assembly 11, the top rod 122 releases the reducing adjustment piece 114, and the reducing adjustment piece 114 will move in the second direction B relative to the winding body 111 under the action of the elastic force of the reset elastic piece, so that the reducing sliding part 1142 drives the winding needle housing 112 to slide along the radial direction of the winding body 111 toward the rotation axis of the winding body 111, and at the same time, the clamping sliding part 1143 drives the clamping piece 113 to release the diaphragm, so as to facilitate the unloading of the battery cell on the winding needle assembly 11.

[0073] The working principle of the variable diameter winding needle mechanism 10 provided in the embodiment of the present invention is:

[0074] The variable diameter winding needle mechanism 10 includes a winding needle assembly 11 and a top needle assembly 12, wherein the winding needle assembly 11 includes a winding body 111, a winding needle housing 112 and a diameter-changing adjustment member 114, the winding needle housing 112 is slidingly connected to the winding body 111, and the winding needle housing 112 can slide along the radial direction of the winding body 111, so that the distance between the winding needle housing 112 and the rotation axis of the winding body 111 can be adjusted by driving the winding needle housing 112 to slide along the radial direction of the winding body 111. The variable diameter adjusting piece 114 is movably connected to the winding body 111 and is connected to the winding needle housing 112. The ejector needle assembly 12 can drive the variable diameter adjusting piece 114 to move relative to the winding body 111, thereby driving the winding needle housing 112 to slide in the radial direction of the winding body 111 through the variable diameter adjusting piece 114. It drives the variable diameter adjusting piece 114 through the ejector needle assembly 12, and drives the winding needle housing 112 to slide in the radial direction of the winding body 111 through the variable diameter adjusting piece, thereby adjusting the distance between the winding needle housing 112 and the rotation axis of the winding body 111, and then changing the winding diameter of the winding needle assembly 11, so that the variable winding diameter winding needle mechanism 10 can adjust the alignment of the pole piece and the size of the battery cell by adjusting the winding diameter.

[0075] In summary:

[0076] The embodiment of the present invention provides a variable diameter winding needle mechanism 10, which has the characteristic of being able to adjust the winding diameter.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, and the present invention can also have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. In addition, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A needle winding mechanism with variable winding diameter, characterized in that: It includes a winding needle assembly (11) and an ejector needle assembly (12); The winding needle assembly (11) comprises a winding body (111), a winding needle housing (112) and a diameter-changing adjusting member (114); the winding needle housing (112) is slidably connected to the winding body (111) and is capable of sliding along the radial direction of the winding body (111); the diameter-changing adjusting member (114) is movably connected to the winding body (111) and is connected to the winding needle housing (112); The ejector pin assembly (12) is capable of driving the diameter-changing adjusting member (114) to move relative to the winding body (111), thereby driving the winding needle housing (112) to slide along the radial direction of the winding body (111) through the diameter-changing adjusting member (114); The winding needle assembly (11) further includes a clamping member (113), the clamping member (113) being slidably connected to the winding body (111) and capable of sliding along the radial direction of the winding body (111), and the diameter-changing adjusting member (114) is also connected to the clamping member (113); The needle winding housing (112) is provided with a diameter-changing sliding groove (1122), the clamping member (113) is provided with a clamping sliding groove (1132), and the diameter-changing adjusting member (114) is provided with a diameter-changing sliding portion (1142) and a clamping sliding portion (1143); The diameter-changing sliding portion (1142) is slidably disposed in the diameter-changing sliding groove (1122), and is capable of abutting against the side wall of the diameter-changing sliding groove (1122) when the diameter-changing adjusting member (114) moves relative to the winding body (111), thereby driving the winding needle housing (112) to slide along the radial direction of the winding body (111); The clamping sliding portion (1143) is slidably disposed in the clamping chute (1132) and is capable of abutting against the side wall of the clamping chute (1132) when the diameter-changing adjusting member (114) moves relative to the winding body (111), thereby driving the clamping member (113) to slide along the radial direction of the winding body (111), thereby clamping or releasing the diaphragm; A needle winding slider (1121) is provided on the needle winding housing (112), the needle winding housing (112) is slidably connected to the winding body (111) via the needle winding slider (1121), and the diameter-changing adjusting member (114) is connected to the needle winding slider (1121).

2. The variable diameter winding needle mechanism according to claim 1, characterized in that: When the diameter-changing adjusting member (114) moves relative to the winding body (111), it can also drive the clamping member (113) to slide along the radial direction of the winding body (111) so as to clamp or release the diaphragm through the clamping member (113), and when the clamping member (113) clamps the diaphragm, the winding needle housing (112) slides along the radial direction of the winding body (111) away from the rotation axis of the winding body (111), and when the clamping member (113) releases the diaphragm, the winding needle housing (112) slides along the radial direction of the winding body (111) toward the rotation axis of the winding body (111).

3. The variable diameter winding needle mechanism according to claim 2, characterized in that: The diameter-changing adjusting member (114) is slidably connected to the winding body (111) and is capable of sliding along the axial direction of the winding body (111) to movably connect the diameter-changing adjusting member (114) to the winding body (111); One end of the diameter-changing adjusting member (114) is a supporting end (1141), and the supporting end (1141) is located at one end of the winding body (111). The ejector pin assembly (12) drives the diameter-changing adjusting member (114) to slide relative to the winding body (111) by abutting against the supporting end (1141), thereby driving the clamping member (113) and the winding needle housing (112) to slide relative to the winding body (111).

4. The variable diameter winding needle mechanism according to claim 3, characterized in that: The clamping chute (1132) has a first clamping sliding section (1136), and the diameter-changing chute (1122) has a first diameter-changing sliding section (1126); The ejector assembly (12) includes an interconnected ejector drive member (121) and an ejector rod (122), wherein the ejector drive member (121) is capable of driving the ejector rod (122) to abut against the ejector end (1141), thereby driving the variable diameter adjusting member (114) to slide relative to the winding body (111), and causing the variable diameter sliding portion (1142) to move within the first variable diameter sliding section (1126), and the clamping sliding portion (1143) to move within the first clamping sliding section (1136), thereby driving the winding needle housing (112) to slide in the radial direction of the winding body (111) away from the rotation axis of the winding body (111) through the variable diameter sliding portion (1142), and at the same time, driving the clamping member (113) to clamp the diaphragm through the clamping sliding portion (1143).

5. The variable diameter winding needle mechanism according to claim 4, characterized in that: The winding needle assembly (11) further comprises a reset elastic member, wherein the reset elastic member is respectively connected to the winding body (111) and the diameter-changing adjustment member (114); The push rod (122) drives the variable diameter adjustment member (114) to slide relative to the winding body (111) along a first direction (A), while causing the reset elastic member to undergo elastic deformation, wherein the first direction (A) is the axial direction of the winding body (111); the supporting driving member (121) can also drive the push rod (122) to move along a second direction (B) opposite to the first direction (A), so as to drive the push rod (122) to release the variable diameter adjustment member (114), and cause the variable diameter adjustment member (114) to move relative to the winding body (111) along the second direction (B) under the action of the elastic force of the reset elastic member, so that the variable diameter sliding portion (1142) drives the winding needle housing (112) to slide along the radial direction of the winding body (111) toward the rotation axis of the winding body (111), and at the same time, causes the clamping sliding portion (1143) to drive the clamping member (113) to release the diaphragm.

6. The variable diameter winding needle mechanism according to claim 4, characterized in that: The ejector assembly (12) further includes a centering sleeve (124) and a centering elastic member (123), wherein the centering sleeve (124) is connected to the ejector drive member (121) via the centering elastic member (123); A centering portion (1111) is provided at one end of the winding body (111) where the supporting end (1141) is located. The supporting drive member (121) can drive the push rod (122) to move toward the supporting end (1141), while driving the centering sleeve (124) to be sleeved on the centering portion (1111) through the centering elastic member (123), and press the centering sleeve (124) to the centering portion (1111) through the centering elastic member (123).

7. The variable diameter winding needle mechanism according to claim 4, characterized in that: The clamping slide groove (1132) further comprises a second clamping sliding section (1137) connected to an end of the first clamping sliding section (1136) away from the rotation axis of the winding body (111), and the second clamping sliding section (1137) is parallel to the rotation axis of the winding body (111); The variable diameter sliding groove (1122) further comprises a second variable diameter sliding section (1127) connected to the first variable diameter sliding section (1126), and the first variable diameter sliding section (1126) and the second variable diameter sliding section (1127) are collinear; When the clamping sliding portion (1143) slides in the second clamping sliding section (1137), the diameter-changing sliding portion (1142) slides in the second diameter-changing sliding section (1127).

8. The variable diameter winding needle mechanism according to claim 7, characterized in that: The variable diameter winding needle mechanism (10) further includes a winding head (13); The winding head (13) is connected to an end of the winding body (111) away from the holding end (1141), and is capable of driving the winding body (111) to move along a first direction (A) or a second direction (B) opposite to the first direction (A), so that the top rod (122) moves relative to the winding body (111), thereby causing the top rod (122) to drive the diameter-changing adjusting member (114) to slide relative to the winding body (111), so that the clamping sliding portion (1143) slides in the second clamping sliding section (1137), wherein the first direction (A) is the axial direction of the winding body (111).

9. A winding device, characterized in that: A winding needle mechanism with a variable winding diameter comprising the mechanism as claimed in any one of claims 1 to 8.

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