Winding needle and winding equipment
By designing the coordination of the needle body, the first needle and the adjustment component, a large-scale adjustment of the needle radial dimension is achieved, which solves the problem of limited adjustment range of the needle in the prior art, reduces production costs and improves the adaptability and efficiency of cell winding.
Patent Information
- Application Number
- CN202422222104.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing coil needle radial size adjustment range is limited, which cannot meet the winding needs of different models of battery cells, resulting in high cost and low efficiency in replacing winding equipment.
A rolling needle is designed, including a rolling needle body, a first rolling needle and a first adjustment member. Through the coupling member of the first rolling needle and the transmission part of the first adjustment member, a large-scale adjustment of the radial dimension of the rolling needle is realized, and it is suitable for winding of different types of battery cells.
Large-scale adjustment of the radial size of the coil needle is achieved, which reduces production costs, saves replacement time, adapts to the winding needs of different models of battery cells, and improves production efficiency.
Smart Images
Figure CN223156090U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a winding pin and winding equipment. Background Art
[0002] The battery cell is an important component of the battery. Taking the wound battery cell as an example, in its production process, the winding equipment needs to use a winding pin to wind the positive electrode sheet and the negative electrode sheet together, and the positive and negative electrode sheets are separated by a separator. The size of the battery cell wound by the winding equipment is related to the radial size of the winding pin selected. The winding pin with a fixed radial size can often only prepare the battery cell with the corresponding size.
[0003] With the development of the lithium battery industry, the demand for different models of battery cells is also increasing continuously. When facing battery cells with different radial sizes, it is necessary to replace the winding pin of the winding equipment, which is costly and inefficient. In the prior art, there are also winding pins that can change their own radial sizes. However, the purpose of the diameter change of such winding pins is to adjust the position of the tab inserted during the winding process, and only a small range of adjustment of the radial size of the winding pin can be achieved, which is difficult to meet the demand for large-range diameter change. Summary of the Utility Model
[0004] Therefore, the technical problem to be solved by the utility model is to overcome the limited adjustment range of the radial size of the existing winding pin and the inability to achieve large-scale adjustment, and provide a winding pin and winding equipment that can achieve a large-scale adjustment of the radial size of the winding pin to adapt to the winding of different models of battery cells.
[0005] In a first aspect, the utility model provides a winding pin, which includes a winding pin main body; a first winding pin that is movably arranged on the outer peripheral surface of the winding pin main body to support the winding section of the strip, the moving direction of the first winding pin is parallel to the radial direction of the winding pin main body, and a connecting piece is arranged on the first winding pin; and a first adjusting component that is arranged on one axial side of the winding pin main body, the first adjusting component can rotate relative to the winding pin main body, and a transmission part that cooperates with the connecting piece is arranged on the first adjusting component; wherein, when the first adjusting component rotates relative to the winding pin main body, the transmission part cooperates with the connecting piece and drives the first winding pin to move in a direction close to or away from the outer peripheral surface of the winding pin main body.
[0006] In an embodiment of the utility model, the transmission part is arranged as an arc-shaped guide groove, the arc-shaped guide groove includes a first end and a second end, the first end is close to the rotation axis of the first adjusting component, the second end is far from the rotation axis of the first adjusting component, and the connecting piece is movably arranged in the arc-shaped guide groove.
[0007] In an embodiment of the present utility model, it further includes a second adjusting member capable of rotating relative to the first adjusting member, and a first meshing tooth is provided on the outer periphery of the second adjusting member; a second meshing tooth meshing with the first meshing tooth is provided on the outer periphery of the first adjusting member.
[0008] In an embodiment of the present utility model, the winding needle body includes two semi-winding needles arranged oppositely, and the first winding needles are provided on the arc circumferences of each of the semi-winding needles.
[0009] In an embodiment of the present utility model, a plurality of the first winding needles are provided on the arc circumferences of each of the semi-winding needles, and the plurality of first winding needles are arranged in sequence along the circumferential direction of the arc circumferences of the semi-winding needles.
[0010] In an embodiment of the present utility model, after the first adjusting member rotates relative to the semi-winding needle and stops, the transmission part is matched with the connecting member and drives the plurality of first winding needles to move synchronously in a direction close to or away from the arc circumference of the semi-winding needle and then stop, so that the surfaces of the plurality of first winding needles are joined to form a supporting surface for winding the battery cell.
[0011] In an embodiment of the present utility model, the two semi-winding needles are arranged oppositely at intervals, and at least one of the semi-winding needles is provided with an avoidance groove on the surface close to the other semi-winding needle, and a second winding needle is arranged in the avoidance groove, and the second winding needle can extend out of the avoidance groove or retract into the avoidance groove to clamp or release the starting section of the tape.
[0012] In an embodiment of the present utility model, a sliding groove is provided on the semi-winding needle, the first winding needle includes a sliding part and a supporting part, the sliding part is arranged in the sliding groove and can slide along the sliding groove, a connecting member is arranged on the sliding part, and the supporting part is connected to the sliding part, and the supporting part is used for supporting the inner side of the tape.
[0013] In an embodiment of the present utility model, the supporting part is arranged in a convex arc-shaped structure.
[0014] In a second aspect, the present utility model further provides a winding device, including the winding needle as described in any one of the above, and the winding needle can rotate.
[0015] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:
[0016] The winding needle described in the present utility model can adjust the radial dimension of the winding needle by setting a winding needle main body, a first winding needle, and a first adjusting component. During use, the connecting component of the first winding needle and the transmission part of the first adjusting component cooperate to achieve the adjustment of the radial dimension of the winding needle. It can not only meet the requirements of tab misalignment and small-range fine adjustment of the radial dimension, but also meet the requirements of cell type change and large-range adjustment of the radial dimension to adapt to the winding of different types of cells, reduce production costs, save the time wasted in type change, and achieve the purpose of rapid type change. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the accompanying drawings. Among them,
[0018] Figure 1 is a schematic structural diagram of the winding needle in a preferred embodiment of the present utility model;
[0019] Figure 2 is a first perspective structural diagram of the winding needle during use in a preferred embodiment of the present utility model;
[0020] Figure 3 is a second first perspective structural diagram of the winding needle during use in a preferred embodiment of the present utility model;
[0021] Figure 4 is a first second perspective structural diagram of the winding needle during use in a preferred embodiment of the present utility model;
[0022] Figure 5 is a second second perspective structural diagram of the winding needle during use in a preferred embodiment of the present utility model;
[0023] Figure 6 is a schematic cross-sectional structural diagram of the half winding needle in a preferred embodiment of the present utility model.
[0024] Explanation of reference numerals in the drawings: 10, half winding needle; 11, chute; 12, avoidance groove; 20, first winding needle; 21, sliding part; 211, connecting component; 22, supporting part; 221, supporting surface; 30, first adjusting component; 31, transmission part; 311, first end; 312, second end; 32, rotation axis; 33, second meshing tooth; 40, second adjusting component; 41, first meshing tooth; 50, second winding needle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following further illustrates the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.
[0026] It should be noted that the wound-type battery cell is formed by winding a strip of material. Taking the winding of the battery cell by a winding needle as an example, after the starting section of the strip of material is clamped and fixed by the winding needle, the winding needle rotates to wind the strip of material to form the battery cell. In the strip of material, the part other than the starting section is the winding section.
[0027] Taking a conventional multi-tab wound-type battery cell as an example, during production, the tabs are inserted into the wound strip of material in a certain order. After winding, blanking, and pressing are completed, ideally, the tabs completely overlap in the direction of their thickness.
[0028] During actual winding, due to the influence of factors such as the thickness of the strip of material and the tabs, it is difficult for the tabs to completely overlap, resulting in misalignment. In the prior art, there is a winding needle with an adjustable radial dimension to adjust the position of the tabs. However, the adjustment range of the radial dimension of such a winding needle is limited, usually within a few millimeters, and a large-scale adjustment cannot be achieved. In existing battery cells, the radial dimension gap between different models can reach several centimeters or more. Therefore, such a winding needle is difficult to meet the requirements of battery cells with different radial dimensions.
[0029] In order to solve the above problems, as shown in Figure 1 the present utility model discloses a winding needle, which includes a winding needle body, a first winding needle 20, and a first adjusting component 30.
[0030] The winding needle body is used to install various components. Those skilled in the art can set the specific shape, size, and quantity of the winding needle body according to actual needs, which will not be elaborated here.
[0031] The first winding needle 20 is used to support the strip of material to achieve the winding and forming of the battery cell. Specifically, the first winding needle 20 is movably arranged on the outer peripheral surface of the winding needle body to support the winding section of the strip of material, and the moving direction of the first winding needle 20 is parallel to the radial direction of the winding needle body. Those skilled in the art can set the moving connection structure of the first winding needle 20 relative to the winding needle body. Exemplarily, a linear, arc-shaped, or special-shaped guide rail or guide groove structure can be opened to achieve the relative movement of the two. A connecting member 211 is provided on the first winding needle 20 to cooperate with the transmission part 31 of the first adjusting component 30 to achieve transmission, thereby driving the first winding needle 20 to move relative to the winding needle body and realizing the adjustment of the radial dimension of the winding needle.
[0032] The first adjusting component 30 is used to drive the first winding needle 20. Specifically, the first adjusting component 30 is arranged on one axial side of the winding needle body, and the first adjusting component 30 can rotate relative to the winding needle body. A transmission part 31 that cooperates with the connecting member 211 is provided on the first adjusting component 30. Referring to Figure 2 and Figure 3As shown, when the first adjusting member 30 rotates relative to the winding needle body, the transmission part 31 cooperates with the connecting member 211 and drives the first winding needle 20 to move in a direction close to or away from the outer peripheral surface of the winding needle body, so as to adjust the radial dimension of the winding needle, thereby realizing the adjustment of the tab misalignment or adapting to different models of battery cells. During winding, the first adjusting member 30 and the winding needle body are relatively stationary to maintain the current radial dimension for winding. Those skilled in the art can set the way for the first adjusting member 30 to rotate relative to the winding needle body according to actual needs. Exemplarily, by setting driving members such as motors and rotary cylinders to drive the first adjusting member 30 to rotate. Compared with the adjustment structure for the winding needle to adjust the radial dimension in a small range in the prior art, this structure can realize the adjustment of the radial dimension in a large range to balance the needs of tab misalignment adjustment and battery cell model change. Those skilled in the art can also set the specific transmission part 31 and the connecting member 211 according to actual needs to achieve transmission. Exemplarily, the connecting member 211 is set as a groove structure, and the transmission part 31 is set as a rod-shaped structure that can move along the groove to achieve transmission.
[0033] When facing situations such as battery cell model change and tab misalignment that require adjustment of the radial dimension, the first adjusting member 30 can be rotated relative to the winding needle body, so that its transmission part 31 cooperates with the connecting member 211 of the first winding needle 20, thereby driving the first winding needle 20 to move in a direction close to or away from the outer peripheral surface of the winding needle body, so as to adjust the radial dimension of the winding needle, thereby quickly changing the model and adapting to different models of battery cells. After the dimension adjustment is in place, stop rotating to make the first adjusting member 30 and the winding needle body relatively stationary, and the current radial dimension can be maintained to realize the winding of the battery cell.
[0034] For the winding needle described in the present utility model, by setting the winding needle body, the first winding needle 20 and the first adjusting member 30, during use, the adjustment of the radial dimension of the winding needle can be realized through the cooperation of the connecting member 211 of the first winding needle 20 and the transmission part 31 of the first adjusting member 30. It can not only meet the needs of tab misalignment and small-range fine adjustment of the radial dimension, but also meet the needs of battery cell model change and large-range adjustment of the radial dimension, so as to adapt to the winding of different models of battery cells, reduce production costs and save the time wasted in model change, and achieve the purpose of quick model change.
[0035] Refer to Figure 4 and Figure 5As shown, in some embodiments of the winding needle of the present utility model, the transmission part 31 is arranged as an arc-shaped guide groove. The arc-shaped guide groove includes a first end 311 and a second end 312. The first end 311 is close to the rotation axis 32 of the first adjusting member 30, and the second end 312 is far from the rotation axis 32 of the first adjusting member 30. Those skilled in the art can set the shape, size, etc. of the arc-shaped guide groove according to actual needs, which will not be elaborated here. Those skilled in the art can set the number of arc-shaped guide grooves according to actual needs; for example, one arc-shaped guide groove or multiple arc-shaped guide grooves. Preferably, when there are multiple arc-shaped guide grooves, the multiple arc-shaped guide grooves are sequentially arranged along the circumferential direction of the rotation axis 32 of the first adjusting member 30.
[0036] The connecting member 211 is movably arranged in the arc-shaped guide groove. Those skilled in the art can set the specific shape and size of the connecting member 211 according to actual needs. Exemplarily, the connecting member 211 is arranged as a cylindrical structure. When the first adjusting member 30 rotates relative to the winding needle body, the connecting member 211 will move along the arc-shaped guide groove accordingly. Correspondingly, the first winding needle 20 can move in a direction close to or away from the outer peripheral surface of the winding needle body to adjust the radial dimension of the winding needle. Preferably, when the connecting member 211 is located at the first end 311 of the arc-shaped guide groove, the winding radial dimension of the winding needle is the smallest; when the connecting member 211 is located at the second end 312 of the arc-shaped guide groove, the winding radial dimension of the winding needle is the largest. By setting this structure, the relative position of the first winding needle 20 relative to the winding needle body can be conveniently adjusted to realize the adjustment of the radial dimension of the winding needle, and the adjustable range is large. In addition, the arc-shaped guide groove can not only provide guidance for the movement of the connecting member 211, but also form a limit for the connecting member 211, making the transmission more stable.
[0037] Refer to Figure 1 、 Figure 4 and Figure 5 As shown in
[0038] Refer to Figure 2As shown, in some embodiments of the winding needle of the present utility model, the winding needle body includes two semi-winding needles 10 arranged oppositely. The axial cross-section of the semi-winding needle 10 is set as a sector; preferably, the axial cross-section of the semi-winding needle 10 is set as a semi-circle. A first winding needle 20 is provided on the arc circumferential surface of each semi-winding needle 10 to realize the adjustment of the radial dimension. By setting this structure, the range of radial dimension adjustment is further expanded, so as to be able to adapt to more types of battery cells. Those skilled in the art can set the number of the first winding needles 20 on the semi-winding needle 10 according to actual needs, such as one or more.
[0039] Furthermore, in some embodiments of the winding needle of the present utility model, a plurality of first winding needles 20 are provided on the arc circumferential surface of each semi-winding needle 10, and the plurality of first winding needles 20 are arranged in sequence along the circumferential direction of the arc circumferential surface of the semi-winding needle 10. By providing a plurality of first winding needles 20 on the semi-winding needle 10, the adaptability of the whole winding needle is improved, and it can be adapted to more types of battery cells; in addition, the increase in the number of the first winding needles 20 also increases the area of contact with the tape, which not only enhances the stability of the winding needle structure, but also better realizes the support for the tape to prevent the collapse problem during the winding process and ensure the high winding quality of the battery cell.
[0040] Preferably, a plurality of transmission parts 31 are provided on the first adjusting part 30 to respectively correspond to each first winding needle 20. During actual use, after the first adjusting part 30 rotates relative to the semi-winding needle 10 and stops, the transmission part 31 cooperates with the connecting part 211, and drives the plurality of first winding needles 20 to move synchronously towards or away from the arc circumferential surface of the semi-winding needle 10 and then stop. The surfaces of the plurality of first winding needles 20 are spliced to form a support surface 221 for winding the battery cell, so as to support the winding section of the tape through the support surface 221. By setting this structure, both the space utilization rate can be improved, and the cost and energy consumption can be saved.
[0041] Furthermore, referring to Figure 6 As shown, in some embodiments of the winding needle of the present utility model, the two semi-winding needles 10 are arranged oppositely at intervals, and at least one semi-winding needle 10 is provided with an avoidance groove 12 on the surface close to the other semi-winding needle 10, and a second winding needle 50 is arranged in the avoidance groove 12. Preferably, each semi-winding needle 10 is provided with an avoidance groove 12 and a second winding needle 50, so that the two second winding needles 50 cooperate with each other to realize the clamping and fixing of the starting section of the tape, so as to more stably and efficiently wind the battery cell.
[0042] The second winding needle 50 can extend out of the avoidance groove 12 or retract into the avoidance groove 12 to clamp or release the starting section of the strip. In this embodiment, the second winding needle 50 is mainly used to clamp the diaphragm. During winding, first clamp the diaphragm with the second winding needle 50, and then perform corresponding winding; after winding is completed, the second winding needle 50 retracts into the avoidance groove 12 and releases the diaphragm to facilitate the blanking of the battery cell. Those skilled in the art can set the driving method for the expansion and contraction of the second winding needle 50 according to actual needs, which will not be elaborated here.
[0043] Referring Figure 3 and Figure 6 As shown, for the winding needle of the present utility model, in some embodiments, a sliding groove 11 is provided on the half winding needle 10. The first winding needle 20 includes a sliding portion 21 and a supporting portion 22. The sliding portion 21 is inserted into the sliding groove 11 and can slide along the sliding groove 11. By setting this structure, the sliding groove 11 can not only provide guidance for the sliding of the sliding portion 21 during movement, but also form a limit for the sliding portion 21 to prevent problems such as shaking and displacement of the first winding needle 20 during the winding process, enhance the structural stability, and ensure high winding quality of the battery cell. Those skilled in the art can set the number of sliding grooves 11 according to actual needs to adapt to different numbers of first winding needles 20, which will not be elaborated here. The connecting piece 211 connects the sliding portion 21 to drive and drive the movement of the first winding needle 20 relative to the half winding needle 10, so as to realize the adjustment of the radial dimension of the winding needle.
[0044] The supporting portion 22 is connected to the sliding portion 21, and the supporting portion 22 is used to support the inner side of the strip. Preferably, the supporting portion 22 and the connecting piece 211 are respectively arranged at both ends of the sliding portion 21 along the radial direction of the half winding needle 10. Those skilled in the art can set the specific shape of the supporting portion 22 according to actual needs. For example, the axial cross-sectional shape of the supporting portion 22 along the half winding needle 10 is set as a cylindrical shape or an elliptical shape to support the strip through a curved surface and prevent the strip from being damaged.
[0045] Preferably, the supporting portion 22 is set as a convex arc-shaped structure. Specifically, both sides of the supporting portion 22 are bent towards the side of the half winding needle 10, so that the middle part thereof protrudes outward relative to the radial direction of the half winding needle 10 to form a convex arc-shaped structure. By setting the convex arc-shaped supporting portion 22, on the one hand, the strip can be supported through its arc-shaped outer surface to prevent damage to the strip and ensure high winding quality of the battery cell; on the other hand, it can also better adapt to the half winding needle 10, so that when the connecting piece 211 is located at the first end 311, the supporting portion 22 can fit the arc-shaped circumferential surface of the half winding needle 10 to improve the space utilization rate.
[0046] The present utility model discloses a winding device, which includes a winding needle as described in any one of the above embodiments. For the winding device of the present utility model, since it includes the winding needle described in the above embodiments, all the beneficial effects thereof are also possessed by the winding device and will not be elaborated herein. The winding needle can rotate to wind the tape. Those skilled in the art can set the rotation mode of the winding needle according to actual needs. For example, it can be driven by a motor. In some embodiments, the winding needle can also move along its axial direction to facilitate the blanking of the battery cell.
[0047] Working principle:
[0048] During winding, first, the starting section of the tape is clamped by the second winding needle 50, and then the winding needle rotates to achieve winding. After this winding is completed, the tape is cut off and the second winding needle 50 releases the starting section of the tape to blank the battery cell. According to the tab situation of the battery cell, the relative positions of the first winding needle 20 and the half winding needle 10 are finely adjusted by rotating the first adjusting component to adjust the position of the tab inserted during the winding process. After the winding of the battery cells in the same batch is completed, the first adjusting component is rotated according to the model of the next batch of battery cells to adjust the relative positions of the first winding needle 20 and the half winding needle 10, so that the radial dimension of the winding needle is adapted to the battery cell to achieve model change.
[0049] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom still fall within the protection scope of the present utility model.
Claims
1. A coiling needle, characterized in that, Comprising: A bobbin body; A first bobbin needle (20) movably arranged on the outer peripheral surface of the bobbin body for supporting the winding section of the strip, the moving direction of the first bobbin needle (20) being parallel to the radial direction of the bobbin body, and a connecting member (211) being provided on the first bobbin needle (20); and A first adjusting member (30) arranged on one axial side of the bobbin body, the first adjusting member (30) being capable of rotating relative to the bobbin body, and a transmission portion (31) cooperating with the connecting member (211) being provided on the first adjusting member (30); Wherein, the first adjusting member (30) rotates relative to the bobbin body, so that the transmission portion (31) cooperates with the connecting member (211) and drives the first bobbin needle (20) to move in a direction close to or away from the outer peripheral surface of the bobbin body.
2. The coiling needle according to claim 1, wherein: The transmission portion (31) is arranged as an arc-shaped guide groove, the arc-shaped guide groove including a first end (311) and a second end (312), the first end (311) being close to the rotation axis (32) of the first adjusting member (30), the second end (312) being away from the rotation axis (32) of the first adjusting member (30), and the connecting member (211) being movably arranged in the arc-shaped guide groove.
3. The winding needle according to claim 1, characterized in that: It further includes a second adjusting member (40) capable of rotating relative to the first adjusting member (30), a first engaging tooth (41) being provided on the outer periphery of the second adjusting member (40); and a second engaging tooth (33) engaging with the first engaging tooth (41) being provided on the outer periphery of the first adjusting member (30).
4. The coiling needle according to claim 1, wherein: The bobbin body includes two semi-bobbins (10) arranged oppositely, and the first bobbin needle (20) is provided on the arc-shaped circumferential surface of each semi-bobbin (10).
5. The coiling needle according to claim 4, characterized in that: A plurality of the first bobbin needles (20) are provided on the arc-shaped circumferential surface of each semi-bobbin (10), and the plurality of first bobbin needles (20) are sequentially arranged along the circumferential direction of the arc-shaped circumferential surface of the semi-bobbin (10).
6. The coiling needle according to claim 5, wherein: After the first adjusting member (30) rotates relative to the semi-bobbin (10) and stops, the transmission portion (31) cooperates with the connecting member (211) and drives the plurality of first bobbin needles (20) to move synchronously in a direction close to or away from the arc-shaped circumferential surface of the semi-bobbin (10) and then stop, so that the surfaces of the plurality of first bobbin needles (20) are joined together to form a support surface (221) for winding the battery cell.
7. The winding needle according to claim 4, characterized in that: The two semi-bobbins (10) are arranged oppositely at intervals, and an avoidance groove (12) is formed on the surface of at least one semi-bobbin (10) close to the other semi-bobbin (10), and a second bobbin needle (50) is arranged in the avoidance groove (12), and the second bobbin needle (50) can extend out of or retract into the avoidance groove (12) to clamp or release the starting section of the strip.
8. The winding needle according to any one of claims 4 to 7, characterized in that: A chute (11) is formed in the semi-rolled needle (10). The first rolled needle (20) includes a sliding portion (21) and a supporting portion (22). The sliding portion (21) is inserted into the chute (11) and can slide along the chute (11). A connecting member (211) is provided on the sliding portion (21). The supporting portion (22) is connected to the sliding portion (21), and the supporting portion (22) is used for supporting the inner side of the material tape.
9. The winding needle according to claim 8, wherein: The supporting portion (22) is arranged in a convex arc-shaped structure.
10. A winding device, characterized in that, It includes a rolled needle according to any one of claims 1 to 9, and the rolled needle can rotate.