Winding needle structure and winding device
By designing the staggered needle sleeve and limit groove of the winding needle structure to adjust the winding needle spacing, the problem of axial displacement between the inner ring diaphragm and the battery cell during the winding process of the battery cell is solved, and the smooth unloading and high-quality winding of the battery cell are achieved.
Patent Information
- Application Number
- CN202422570937.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-23
AI Technical Summary
During the manufacturing process of lithium-ion batteries, the tension provided by the winding needle structure causes the inner ring diaphragm of the battery cell and the axial displacement of the battery cell, resulting in the problem of battery cell pulling, which affects product quality.
A winding needle structure is designed, including a fixed needle seat, a movable needle seat and a staggered needle sleeve. The spacing between the movable winding needle and the fixed winding needle is adjusted by the limiting groove and limiting member of the staggered needle sleeve to provide sufficient winding tension, and the spacing is reduced during unloading to facilitate the detachment of the battery cell.
While ensuring the winding quality of the battery cells, it facilitates the unloading of the battery cells, avoids axial displacement between the inner ring diaphragm and the battery cells, and improves product quality.
Smart Images
Figure CN223347826U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery cell manufacturing, and in particular to a winding needle structure and a winding device. Background Art
[0002] Winding is one of the key processes in the manufacturing process of lithium-ion batteries. Usually, the battery cell is formed by winding it around the periphery of the winding needle structure. Since the winding needle structure needs to provide tension to the battery cell so that the battery cell can be tightly wound around the periphery of the winding needle structure, the inner ring diaphragm wrapped on the winding needle structure is prone to axial displacement with the battery cell during cutting, resulting in the problem of battery cell pulling, affecting product quality. Utility Model Content
[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a winding needle structure that can facilitate the unloading of battery cells while ensuring the winding tension of the battery cells.
[0004] The present application also proposes a winding device having the above-mentioned winding needle structure.
[0005] The winding needle structure according to the first embodiment of the present application includes:
[0006] A fixed needle seat, wherein the fixed needle seat is provided with a fixed winding needle;
[0007] A movable needle seat, wherein a movable winding needle and a limiter are provided at intervals on the movable needle seat, wherein the movable winding needle and the fixed winding needle are arranged at intervals along the first direction and are combined to form a winding needle body, and the winding needle body is used to provide support for winding the battery cell; and
[0008] The staggered needle sleeve is arranged on the outer periphery of the fixed needle seat and the movable needle seat, and the inner wall of the staggered needle sleeve is provided with a first limiting groove, the opening direction of the first limiting groove is parallel to the first direction, and the staggered needle sleeve can move relative to the movable needle seat along the second direction so that the limiting member enters or leaves the first limiting groove, wherein the first direction and the second direction form a first angle.
[0009] According to the winding needle structure of the embodiment of the present application, there are at least the following beneficial effects: by providing a staggered needle sleeve disposed on the outer periphery of the fixed needle seat and the movable needle seat, the side wall of the staggered needle sleeve is provided with a first limiting groove with an opening direction parallel to the first direction, so that when the staggered needle sleeve moves relative to the movable needle seat in the second direction, the limiting member enters or leaves the first limiting groove, thereby driving the movable winding needle to move in the first direction through the limiting member, so as to adjust the distance between the movable winding needle and the fixed winding needle, and further adjust the size of the winding needle body. In this way, when the limiting member is located outside the first limiting groove, the distance between the movable winding needle and the fixed winding needle is larger, so that the winding needle body has a relatively large size, thereby providing sufficient tension for winding the battery cell, which is conducive to the winding and forming of the battery cell. At this time, the inner ring diaphragm of the battery cell is covered on the outer periphery of the winding needle body. When the battery cell is wound and needs to be unwound, the needle sleeve is moved in the second direction so that the limit member enters the first limit groove. At this time, the movable winding needle moves in the first direction toward the fixed winding needle, and the size of the winding needle body is reduced so that the size of the winding needle body is smaller than the inner diameter of the inner ring diaphragm of the battery cell. A gap is generated between the inner ring diaphragm of the battery cell and the outer periphery of the winding needle body, which makes it easier for the battery cell to detach from the winding needle body to achieve battery cell unloading.
[0010] According to some embodiments of the present application, the first limiting groove is arranged through the inner wall of the staggered needle sleeve.
[0011] According to some embodiments of the present application, the misaligned needle sleeve is provided with a first guide portion, which extends from the inner wall of the misaligned needle sleeve in a direction away from the fixed needle seat to connect with the first limiting groove, and the first guide portion is inclined relative to the second direction, and the first guide portion is used to guide the limiting member to enter or leave the first limiting groove.
[0012] According to some embodiments of the present application, a second limiting groove is provided on the inner wall of the staggered needle sleeve, and the second limiting groove is arranged on the outer periphery of the first limiting groove and extends along the second direction. The length of the second limiting groove along the second direction is greater than or equal to the movement stroke of the staggered needle sleeve along the second direction. When the staggered needle sleeve moves along the second direction until the limiting member leaves the first limiting groove, the limiting member is located in the second limiting groove.
[0013] According to some embodiments of the present application, the limiting member includes a rotating wheel, which is rotatably connected to the movable needle seat, and the rotating wheel is rollingly connected to the staggered needle sleeve along the second direction.
[0014] According to some embodiments of the present application, the needle winding structure further includes an elastic member connected to the movable needle seat, and when the limiting member is located outside the first limiting groove, the elastic member has an elastic force parallel to the first direction.
[0015] According to some embodiments of the present application, the fixed needle seat is provided with a receiving cavity and a movable hole connected to the receiving cavity, the movable needle seat can be movably installed in the receiving cavity, and the limiting member is passed through the movable hole along the first direction.
[0016] According to some embodiments of the present application, the elastic member is installed in the accommodating cavity, and one end of the elastic member is connected to the movable needle seat, and the other end of the elastic member is connected to a side of the fixed needle seat away from the movable hole.
[0017] According to some embodiments of the present application, the needle winding structure also includes a staggered needle guide rail, which includes a supporting member and a moving member. The moving member can be movably connected to the supporting member. The supporting member is installed on the fixed needle seat and is located in the accommodating cavity. The moving member is connected to the movable needle seat.
[0018] The winding device according to the second embodiment of the present application includes the winding needle structure as described in the first aspect above.
[0019] The winding device according to the embodiment of the present application has at least the following beneficial effects: it can facilitate the unloading of battery cells while ensuring the winding tension of the battery cells.
[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:
[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the winding needle structure disclosed in the embodiment of the present application;
[0023] Figure 2 This is a front view of the winding needle structure disclosed in the embodiment of the present application;
[0024] Figure 3 A side view of the needle winding structure disclosed in an embodiment of the present application, with the limiting member entering the first limiting groove;
[0025] Figure 4 A side view of the needle winding structure disclosed in an embodiment of the present application, in a state where the limiting member leaves the first limiting groove;
[0026] Figure 5 This is a front view of the winding needle body disclosed in an embodiment of the present application, with the limiting member entering the first limiting groove;
[0027] Figure 6 This is a front view of the winding needle body disclosed in an embodiment of the present application, with the limiting member leaving the first limiting groove;
[0028] Figure 7 A schematic diagram of the disassembly of the winding needle structure disclosed in an embodiment of the present application from one viewing angle;
[0029] Figure 8 This is a disassembled schematic diagram of the winding needle structure disclosed in an embodiment of the present application from another perspective;
[0030] Figure 9 This is a front view of the staggered needle sleeve disclosed in an embodiment of the present application;
[0031] Figure 10 A partial cross-sectional view of the staggered needle sleeve disclosed in an embodiment of the present application;
[0032] Figure 11 This is a structural diagram of the fixed needle seat and the movable needle seat disclosed in an embodiment of the present application in an assembled state;
[0033] Figure 12 This is a schematic structural diagram of the fixed needle seat disclosed in an embodiment of the present application;
[0034] Figure 13 This is a schematic structural diagram of the movable needle seat disclosed in an embodiment of the present application.
[0035] Reference numerals:
[0036] 100. Winding needle structure; 101. Fixed needle seat; 1011. Accommodating cavity; 1012. Movable hole; 102. Movable needle seat; 103. Staggered needle sleeve; 1031. First limiting groove; 1032. Second limiting groove; 1033. First guide part; 1034. Second guide part; 104. Fixed winding needle; 105. Movable winding needle; 106. Limiting member; 1061. Rotating wheel; 1062. Retaining frame; 107. Elastic member; 108. Staggered needle guide rail; 109. Winding needle shaft; 110. Bushing; 111. Guide rod; x, first direction; y, second direction. DETAILED DESCRIPTION
[0037] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0038] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they cannot be understood as limitations on this application.
[0039] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0040] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0041] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.
[0042] The technical solution of the present application will be further described below with reference to the embodiments and drawings.
[0043] Please also refer to Figures 1 to 6 In the first aspect, the embodiment of the present application provides a needle winding structure 100, including a fixed needle seat 101, a movable needle seat 102 and a staggered needle sleeve 103, the fixed needle seat 101 is provided with a fixed winding needle 104, the movable needle seat 102 is provided with a movable winding needle 105 and a limiter 106 at intervals, and the movable winding needle 105 and the fixed winding needle 104 are arranged along a first direction x (i.e. Figure 2 and Figure 5 The winding needle body is used to provide support for the winding of the battery core. The staggered needle sleeve 103 is sleeved on the outer periphery of the fixed needle seat 101 and the movable needle seat 102. The inner wall of the staggered needle sleeve 103 is provided with a first limiting groove 1031. The opening direction of the first limiting groove 1031 is parallel to the first direction x. The staggered needle sleeve 103 is arranged along the second direction y (i.e. Figure 1 、 Figure 3 and Figure 4 The first direction x and the second direction y are movable relative to the movable needle seat 102 so that the limiting member 106 enters or leaves the first limiting groove 1031, wherein the first direction x and the second direction y form a first angle.
[0044] The winding needle structure 100 provided in the embodiment of the present application comprises a staggered needle sleeve 103 that is sleeved around the outer periphery of the fixed needle seat 101 and the movable needle seat 102. The sidewall of the staggered needle sleeve 103 is provided with a first limiting groove 1031 whose opening direction is parallel to the first direction x. When the staggered needle sleeve 103 moves relative to the movable needle seat 102 in the second direction y, the limiting member 106 enters or leaves the first limiting groove 1031, thereby driving the movable winding needle 105 to move in the first direction x through the limiting member 106, thereby adjusting the distance between the movable winding needle 105 and the fixed winding needle 104, and further adjusting the size of the winding needle body. In this way, when the limiting member 106 is located outside the first limiting groove 1031, the distance between the movable winding needle 105 and the fixed winding needle 104 is larger, resulting in a relatively larger size of the winding needle body, thereby providing sufficient tension for winding the battery cell and facilitating the winding and forming of the battery cell. At this time, the inner ring diaphragm of the battery cell is wrapped around the outer periphery of the winding needle body. When the battery cell is wound and needs to be unwound, the staggered needle sleeve 103 is moved along the second direction y so that the limit member 106 enters the first limit groove 1031. At this time, the movable winding needle 105 moves along the first direction x toward the fixed winding needle 104, and the size of the winding needle body is reduced so that the size of the winding needle body is smaller than the inner diameter of the inner ring diaphragm of the battery cell. A gap is generated between the inner ring diaphragm of the battery cell and the outer periphery of the winding needle body, which makes it easy for the battery cell to be separated from the winding needle body to realize battery cell unloading, effectively avoiding the phenomenon of battery cell pulling out due to axial displacement between the inner ring diaphragm and the battery cell during telecommunication unloading.
[0045] Optionally, the first angle is greater than 0 degrees and less than 180 degrees. For example, the first angle can be 30 degrees, 45 degrees, 90 degrees, or 120 degrees. Exemplarily, the first direction x is parallel to the radial direction of the staggered needle sleeve 103, and the second direction y is parallel to the axial direction of the staggered needle sleeve 103. In this case, the first direction x is perpendicular to the second direction y, so as to facilitate the structural design of the needle winding structure 100, improve the structural reliability, and facilitate the relative movement of the staggered needle sleeve 103 and the movable needle seat 102.
[0046] Please combine Figures 7 to 9In some embodiments, the first limiting groove 1031 is provided through the inner wall of the winding needle sleeve 103. This provides a larger movable space for the limiting member 106, thereby increasing the movement stroke of the movable winding needle 105 and the dimensional variation range of the winding needle body. This can provide sufficient tension for winding the battery cell when the winding needle body is large to ensure the quality of the battery cell winding, while also allowing the winding needle body to have a smaller size to increase the distance between the inner ring diaphragm of the battery cell and the winding needle body, thereby facilitating the battery cell to be detached from the winding needle body.
[0047] It is understandable that in other embodiments, the first limiting groove 1031 may also be a groove with an opening toward the fixed needle seat 101 .
[0048] Optionally, a second limiting groove 1032 is provided on the inner wall of the staggered needle sleeve 103. The second limiting groove 1032 is provided on the outer periphery of the first limiting groove 1031 and extends along the second direction y. The length of the second limiting groove 1032 along the second direction y is greater than or equal to the movement stroke of the staggered needle sleeve 103 along the second direction y. When the staggered needle sleeve 103 moves along the second direction y until the limiting member 106 leaves the first limiting groove 1031, the limiting member 106 is located in the second limiting groove 1032.
[0049] In this way, when the limiting member 106 enters the first limiting groove 1031, the movement of the limiting member 106 along the second direction y and the movement along the circumferential direction of the staggered needle sleeve 103 are limited by the inner wall of the first limiting groove 1031. When the limiting groove leaves the first limiting groove 1031, the movement of the limiting member 106 along the second direction y and the movement along the circumferential direction of the staggered needle sleeve 103 are limited by the inner wall of the second limiting groove 1032, thereby limiting the relative movement stroke of the limiting member 106 and the staggered needle sleeve 103, which is beneficial to the positioning and installation of the limiting member 106 and the staggered needle sleeve 103. At the same time, the provision of the second limiting groove 1032 can also reduce the weight of the staggered needle sleeve 103, which is beneficial to reducing the weight and cost of the needle winding structure 100.
[0050] Please combine Figure 10 Optionally, the staggered needle sleeve 103 is provided with a first guide portion 1033. The first guide portion 1033 extends from the inner wall of the staggered needle sleeve 103 in a direction away from the fixed needle seat 101 to connect with the first limiting groove 1031. The first guide portion 1033 is arranged obliquely with respect to the second direction y. The first guide portion 1033 is used to guide the limiting member 106 into or out of the first limiting groove 1031. This facilitates the relative movement of the movable needle seat 102 and the staggered needle sleeve 103, improves the flexibility and convenience of the staggered needle sleeve 103 in the second direction y, and facilitates the adjustment of the spacing between the movable winding needle 105 and the fixed winding needle 104.
[0051] Optionally, the normal of the first plane is defined to be parallel to the second direction y, and the first guide portion 1033 has a second angle with the first plane to guide the limiting member 106 to move along the second direction y.
[0052] Optionally, the first limiting groove 1031 is located at one end of the second limiting groove 1032, and the first guide portion 1033 is provided on an inner wall of the first limiting groove 1031 near the center of the second limiting groove 1032. This helps to limit the movement direction of the staggered needle sleeve 103, thereby reducing the movement stroke of the staggered needle sleeve 103 and further helping to reduce the volume of the needle winding structure 100.
[0053] In some embodiments, the pincer sleeve 103 is provided with a second guide portion 1034. The second guide portion 1034 extends along the first direction x from the bottom wall of the second limiting groove 1032 to the inner wall of the pincer sleeve 103. The second guide portion 1034 extends along the circumference of the pincer sleeve 103 and is inclined relative to the first direction x. This forms a guide slope on the circumferential surface of the inner wall of the pincer sleeve 103, facilitating the rotation of the pincer sleeve 103 and facilitating the installation and positioning of the pincer sleeve 103 and the limiting member 106.
[0054] Optionally, the normal of the second plane is defined to be parallel to the first direction x, and the second guide portion 1034 has a second angle with the second plane, so as to facilitate guiding the rotational movement of the misaligned needle sleeve 103 with the second direction y as the axial direction.
[0055] Please combine Figures 11 to 13 In some embodiments, the limiting member 106 includes a rotating wheel 1061, which is rotatably connected to the movable needle seat 102, and the rotating wheel 1061 is connected to the staggered needle sleeve 103 in a rolling manner along the second direction y, so that the rotating wheel 1061 can roll relative to the staggered needle sleeve 103 along the second direction y.
[0056] In this way, when the staggered needle sleeve 103 moves along the second direction y relative to the fixed needle seat 101, the rotating wheel 1061 rolls along the second direction y relative to the staggered needle sleeve 103, and drives the movable winding needle 105 to move along the second direction y, so as to reduce the friction force of the staggered needle sleeve 103 relative to the movable needle seat 102 when the staggered needle sleeve 103 moves along the second direction y, thereby facilitating the movement of the staggered needle sleeve 103 and the movable needle seat 102 along the second direction y, and improving the flexibility of the needle winding structure 100 in switching between different working states.
[0057] Optionally, the limiting member 106 further includes a retaining frame 1062, which is connected to the movable needle seat 102, and the rotating wheel 1061 is rotatably connected to the retaining frame 1062, so that the rotating wheel 1061 can be rotatably installed on the movable needle seat 102, thereby satisfying the requirement that the rotating wheel 1061 drives the movable needle seat 102 to move along the second direction y, and can also reduce the relative friction between the misaligned needle sleeve 103 and the movable needle seat 102.
[0058] In some embodiments, the needle winding structure 100 further includes an elastic member 107 , which is connected to the movable needle seat 102 . When the limiting member 106 is located outside the first limiting groove 1031 , the elastic member 107 has an elastic force parallel to the first direction x.
[0059] Thus, when the staggered needle sleeve 103 moves in the second direction y, causing the limiting member 106 to enter the first limiting groove 1031 from the second limiting groove 1032 in the second direction y, the elastic member 107 can, driven by its own elastic force, drive the movable needle seat 102 to displace in the first direction x, so that the limiting member 106 is engaged in the first limiting groove 1031 in the first direction x, driving the movable winding needle 105 to move toward the fixed winding needle 104, thereby reducing the size of the winding needle body and switching the winding needle structure 100 to the blanking state. Adding the elastic member 107 to provide a driving force for the movement of the movable needle seat 102 in the first direction x can simplify the structural design of the winding needle structure 100, reduce driving energy consumption, simplify the operation of switching the winding needle structure 100 between different states, and improve the flexibility of the winding needle structure 100.
[0060] Optionally, the fixed needle seat 101 is provided with a receiving cavity 1011 and a movable hole 1012 communicating with the receiving cavity 1011. The movable needle seat 102 is movably mounted within the receiving cavity 1011, and the stopper 106 is passed through the movable hole 1012 along the first direction x. This allows for rational use of space, reduces the size of the needle winding structure 100 along the first direction x, and facilitates reducing the volume of the needle winding structure 100.
[0061] Optionally, the elastic member 107 is installed in the accommodating cavity 1011 , and one end of the elastic member 107 is connected to the movable needle seat 102 , and the other end of the elastic member 107 is connected to a side of the fixed needle seat 101 away from the movable hole 1012 .
[0062] In this way, the fixed needle base 101 can be used to provide fixed support for the elastic member 107, while also allowing the elastic member 107 to be accommodated within the accommodating cavity 1011, thereby protecting the elastic member 107 and improving structural reliability. This prevents interference between the elastic member 107 and the locking needle guard 103 when moving in the second direction y, which could affect the movement of the locking needle guard 103 and the elastic member 107. Furthermore, the elastic member 107 and the rotating wheel 1061 are located on either side of the movable needle base 102 along the first direction x, respectively. The driving force of the locking needle guard 103 moving in the second direction y can be transmitted to the elastic member 107 via the rotating wheel 1061 and the movable needle base 102, thereby compressing the elastic member 107 and converting it into stored elastic force, thereby improving energy conversion efficiency and reducing driving energy consumption.
[0063] Optionally, the elastic member 107 may be any one of a compression spring, a leaf spring or a spring sheet, etc., and may be specifically configured according to actual needs and is not limited here.
[0064] In some embodiments, as can be seen from the foregoing, the movable needle seat 102 is installed in the accommodating cavity 1011 of the fixed needle seat 101. Based on this, the needle winding structure 100 further includes a staggered needle guide 108. The staggered needle guide 108 includes a supporting member and a moving member. The moving member is movably connected to the supporting member. The supporting member is installed on the fixed needle seat 101 and located in the accommodating cavity 1011. The moving member is connected to the movable needle seat 102. This can not only support the movable needle seat 102, but also provide a guide for the movement of the movable needle seat 102 along the first direction x, and reduce the friction of the movable needle seat 102 relative to the fixed needle seat 101, thereby improving the movement reliability of the needle winding structure 100.
[0065] Optionally, the staggered needle guide 108 can be a cross-roller guide, which is conducive to increasing the guide span and improving the guide stiffness, thereby improving the reliability of the relative movement between the movable winding needle 105 and the fixed winding needle 104, so as to extend the service life of the winding needle structure 100. At the same time, it can also improve the accuracy of the movement of the movable needle seat 102 along the first direction x, so as to ensure the accuracy of the size adjustment of the winding needle body, which is conducive to improving the accuracy of the battery cell winding.
[0066] It is understandable that in other embodiments, the staggered needle guide 108 can also be a cylindrical linear guide or a micro ball guide.
[0067] Please refer again Figure 1 and Figure 7 In some embodiments, the winding needle structure 100 also includes a winding needle shaft 109, a bushing 110 and a guide rod 111. The fixed needle seat 101 is installed on one end of the winding needle shaft 109, the bushing 110 is sleeved on the outer periphery of the winding needle shaft 109, and the guide rod 111 is installed on the bushing 110 and passes through the staggered needle sleeve 103 along the second direction y. The guide rod 111 is used to guide the movement of the staggered needle sleeve 103 along the second direction y, thereby improving the movement reliability of the staggered needle sleeve 103.
[0068] Optionally, there are multiple guide rods 111, and the multiple guide rods 111 are arranged in sequence along the circumferential direction of the staggered needle sleeve 103, thereby limiting the rotation of the staggered needle sleeve 103 and improving the structural reliability of the needle winding structure 100.
[0069] In a second aspect, the present application further provides a winding device (not shown), comprising the winding needle structure 100 as described in the first aspect above.
[0070] It can be understood that, since the winding device includes the winding needle structure 100 of the first aspect, the winding device has the beneficial effects of the winding needle structure 100 of the first aspect, which will not be described in detail here.
[0071] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.
Claims
1. A needle winding structure, characterized in that: include: A fixed needle seat, wherein the fixed needle seat is provided with a fixed winding needle; A movable needle seat, wherein a movable winding needle and a limiter are provided at intervals on the movable needle seat, wherein the movable winding needle and the fixed winding needle are arranged at intervals along the first direction and are combined to form a winding needle body, and the winding needle body is used to provide support for winding the battery cell; and The staggered needle sleeve is arranged on the outer periphery of the fixed needle seat and the movable needle seat, and the inner wall of the staggered needle sleeve is provided with a first limiting groove, the opening direction of the first limiting groove is parallel to the first direction, and the staggered needle sleeve can move relative to the movable needle seat along the second direction so that the limiting member enters or leaves the first limiting groove, wherein the first direction and the second direction form a first angle.
2. The needle winding structure according to claim 1, characterized in that: The first limiting groove is arranged through the inner wall of the staggered needle sleeve.
3. The needle winding structure according to claim 1 or 2, characterized in that: The staggered needle sleeve is provided with a first guide portion, which extends from the inner wall of the staggered needle sleeve in a direction away from the fixed needle seat to connect with the first limiting groove, and the first guide portion is inclined relative to the second direction. The first guide portion is used to guide the limiting member to enter or leave the first limiting groove.
4. The needle winding structure according to claim 1 or 2, characterized in that: A second limiting groove is provided on the inner wall of the staggered needle sleeve. The second limiting groove is provided on the outer periphery of the first limiting groove and extends along the second direction. The length of the second limiting groove along the second direction is greater than or equal to the movement stroke of the staggered needle sleeve along the second direction. When the staggered needle sleeve moves along the second direction until the limiting member leaves the first limiting groove, the limiting member is located in the second limiting groove.
5. The needle winding structure according to claim 1, characterized in that: The limiting member includes a rotating wheel, the rotating wheel is rotatably connected to the movable needle seat, and the rotating wheel is rollingly connected to the staggered needle sleeve along the second direction.
6. The needle winding structure according to claim 1, characterized in that: The needle winding structure further includes an elastic member connected to the movable needle seat. When the limiting member is located outside the first limiting groove, the elastic member has an elastic force parallel to the first direction.
7. The needle winding structure according to claim 6, characterized in that: The fixed needle seat is provided with an accommodating cavity and a movable hole communicating with the accommodating cavity. The movable needle seat can be movably installed in the accommodating cavity. The limiting member is passed through the movable hole along the first direction.
8. The needle winding structure according to claim 7, characterized in that: The elastic member is installed in the accommodating cavity, and one end of the elastic member is connected to the movable needle seat, and the other end of the elastic member is connected to a side of the fixed needle seat away from the movable hole.
9. The needle winding structure according to claim 7, characterized in that: The needle winding structure also includes a staggered needle guide rail, which includes a supporting member and a moving member. The moving member can be movably connected to the supporting member. The supporting member is installed on the fixed needle seat and is located in the accommodating cavity. The moving member is connected to the movable needle seat.
10. A winding device, characterized in that: It comprises the winding needle structure as described in any one of claims 1-9.