Winding needle mechanism, winding needle device and winding equipment

Abstract

The utility model discloses a winding needle mechanism, a winding needle device and winding equipment, the winding needle mechanism comprises: an outer needle, the outer peripheral surface of which is used for winding a battery cell; the inner needle is connected with the outer needle, and the outer needle can move relative to the radial direction of the inner needle; the guide assembly is arranged in the inner needle; one end of the first jacking assembly penetrates through the inner needle to be connected with the outer needle, the other end of the first jacking assembly abuts against the guide assembly, the guide assembly can move in a reciprocating mode in the first direction, and the first jacking assembly moves in a reciprocating mode relative to the guide assembly in the second direction; the outer needle is driven to move back and forth along the second direction; the first direction intersects with the second direction. According to the technical scheme provided by the invention, the problem of outer needle reducing failure caused by falling of the inner needle bolt can be avoided, and the winding quality and the production efficiency of the battery cell can be improved.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing technology, and in particular relates to a needle winding mechanism, a needle winding device, and a winding equipment. Background Technology

[0002] In the lithium battery production process, the battery cell is formed by winding the separator and positive and negative electrode plates through a winding device. The outer circumference of the winding needle is related to the alignment of the electrode tabs and the size of the battery cell, so the outer circumference of the winding needle directly affects the quality of the battery cell.

[0003] In related technologies, the needle winding mechanism usually moves horizontally through an internal guide rod, which in turn moves the cam groove to increase or decrease the outer needle winding diameter. However, the cam groove structure used to achieve diameter change has the drawback of the inner needle bolt falling off, which will lead to diameter change failure. Furthermore, the misalignment of the electrode tabs will cause the battery cell to be scrapped, which will affect the production efficiency of the battery cell. Utility Model Content

[0004] The purpose of this application is to provide a needle winding mechanism, a needle winding device, and a winding equipment.

[0005] According to a first aspect of the embodiments of this application, a needle winding mechanism is provided, comprising:

[0006] Outer needle, the outer peripheral surface of which is used for winding the battery cell;

[0007] An inner needle is connected to an outer needle, and the outer needle is capable of radial movement relative to the inner needle;

[0008] A guide assembly is disposed inside the inner needle;

[0009] At least one first lifting component, one end of the first lifting component passes through the inner needle and is connected to the outer needle, the other end of the first lifting component abuts against the guide component, the guide component is capable of reciprocating along a first direction, and the first lifting component reciprocates relative to the guide component along a second direction to drive the outer needle to reciprocate along the second direction;

[0010] The first direction intersects with the second direction.

[0011] Optionally, the first direction and the third direction form a first plane, and the guiding component includes a first guiding surface, the first guiding surface and the first plane form a first angle;

[0012] The first lifting assembly includes a first rolling element and a first push rod. One end of the first push rod is connected to the first rolling element, and the other end of the first push rod passes through the inner needle and is connected to the outer needle. The first rolling element abuts against the first guide surface.

[0013] The first direction intersects with the third direction, and the second direction intersects with the third direction.

[0014] Optionally, the inner needle is provided with a first receiving groove;

[0015] The first lifting assembly further includes a first bushing, which is embedded in the first receiving groove, and the first push rod is slidably connected to the first bushing.

[0016] Optionally, the first lifting assembly further includes a first elastic element, which is sleeved on the first top rod and located between the first rolling element and the first bushing.

[0017] Optionally, the needle winding mechanism further includes:

[0018] A clamping assembly is disposed on the side of the inner needle away from the outer needle;

[0019] At least one second lifting component, one end of which passes through the inner pin and is connected to the clamping component, and the other end of which abuts against the guide component. The guide component reciprocates along the first direction, and the second lifting component moves relative to the guide component along the second direction to drive the clamping component to move along the second direction.

[0020] Optionally, the guide assembly further includes a second guide surface, which forms a second angle with the first plane;

[0021] The second lifting assembly includes a second rolling element and a second push rod. One end of the second push rod is connected to the second rolling element, and the other end of the second push rod is connected to the clamping assembly. The second rolling element abuts against the second guide surface.

[0022] Optionally, the inner needle is provided with a second receiving groove;

[0023] The second lifting assembly also includes a second bushing, which is embedded in the second receiving groove, and the second push rod is slidably connected to the second bushing.

[0024] Optionally, the second lifting assembly further includes a second elastic element, which is sleeved on the second top rod and located between the second rolling element and the second bushing.

[0025] Optionally, the second lifting assembly further includes a third elastic element;

[0026] The second push rod has a receiving cavity, one end of the clamping assembly is embedded in the receiving cavity, and the third elastic element is disposed in the receiving cavity and located between the clamping assembly and the inner wall of the receiving cavity.

[0027] Optionally, the clamping assembly includes a pressure plate and a connector. The connector includes a first connecting end and a second connecting end. The pressure plate has an installation groove. The first connecting end is embedded in the installation groove, and the second connecting end is embedded in the receiving cavity.

[0028] According to a second aspect of the embodiments of this application, a needle winding device is provided, comprising:

[0029] The two needle winding mechanisms mentioned above are a first needle winding mechanism and a second needle winding mechanism, and the first needle winding mechanism and the second needle winding mechanism are arranged at intervals;

[0030] A driving mechanism is provided, which is capable of driving the guide components of the first needle winding mechanism and the second needle winding mechanism to move along a first direction.

[0031] According to a third aspect of the embodiments of this application, a winding apparatus is provided, comprising:

[0032] The aforementioned needle winding mechanism; or

[0033] The aforementioned needle winding device.

[0034] One technical advantage of this application embodiment is that it can avoid the problem of outer needle diameter change failure caused by inner needle bolt falling off, thereby improving the winding quality of the battery cell and the production efficiency of the battery cell.

[0035] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0037] Figure 1 This is a schematic diagram of the winding needle mechanism in the embodiments of this application;

[0038] Figure 2 This is a schematic diagram of the winding needle mechanism in the embodiments of this application;

[0039] Figure 3 This is a schematic diagram of the installation of the first lifting component in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the installation of the first lifting component in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the installation of the first lifting component in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the installation of the second lifting component in an embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the installation of the second lifting component in an embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the first state of the needle winding mechanism of the needle winding device in the embodiment of this application;

[0045] Figure 9 This is a schematic diagram of the second state of the needle winding mechanism of the needle winding device in the embodiments of this application;

[0046] Figure 10 This is a schematic diagram of the needle winding device in the embodiments of this application.

[0047] Explanation of reference numerals in the attached drawings: 100; outer needle 1; outer peripheral surface 11; inner needle 2; cavity 21; first side wall 22; second side wall 23; first receiving groove 24; second receiving groove 25; first through hole 26; second through hole 27; guide assembly 3; first guide surface 31; second guide surface 32; first lifting assembly 4; first rolling element 41; first bearing 411; second bearing 412; first rotating shaft 413; first push rod 42; first protrusion 421; first bushing 43; first elastic element 44; second lifting assembly 5; Second rolling element 51; Third bearing 511; Fourth bearing 512; Second rotating shaft 513; Second push rod 52; Second protrusion 521; Receiving cavity 522; Second bushing 53; Second elastic element 54; Third elastic element 55; Clamping assembly 6; Pressure plate 61; Mounting groove 611; Connector 62; First connecting end 621; Second connecting end 622; First included angle c; Second included angle d; Needle winding device 200; First needle winding mechanism 100a; Second needle winding mechanism 100b; Drive mechanism 7; Fourth elastic element 8; Gap 9. Detailed Implementation

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0050] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0051] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0053] First, it should be noted that the first direction, second direction, and third direction mentioned in the embodiments of this application are referred to in the appendix. Figure 1 , Figure 2 The marked directions. Among them, the first direction, the second direction, and the third direction intersect each other.

[0054] like Figures 1-7 As shown, the needle winding device 200 is used to wind the battery cell. The needle winding device 200 includes two needle winding mechanisms 100, that is, the two needle winding mechanisms 100 work together to wind the battery cell. In the first aspect of the embodiments of this application, one needle winding mechanism 100 is described.

[0055] According to a first aspect of the embodiments of this application, a needle winding mechanism 100 is provided, including an outer needle 1, an inner needle 2, a guide assembly 3, and at least one first lifting assembly 4; the outer peripheral surface 11 of the outer needle 1 is used for winding a battery cell; the inner needle 2 is connected to the outer needle 1, and the outer needle 1 is capable of radial movement relative to the inner needle 2; the guide assembly 3 is disposed inside the inner needle 2; one end of the first lifting assembly 4 passes through the inner needle 2 and is connected to the outer needle 1, and the other end of the first lifting assembly 4 abuts against the guide assembly 3; the guide assembly 3 is capable of reciprocating along a first direction, and the first lifting assembly 4 reciprocates relative to the guide assembly 3 along a second direction to drive the outer needle 1 to reciprocate along the second direction; the first direction intersects the second direction.

[0056] like Figure 1 As shown, the needle winding mechanism 100 includes an outer needle 1, an inner needle 2, a guide assembly 3, and at least one first lifting assembly 4.

[0057] The outer needle 1 includes an outer peripheral surface 11, which is an arc-shaped surface. The outer peripheral surface 11 is used to wind the battery cell. The inner needle 2 is located on the side of the outer needle 1 away from the outer peripheral surface 11. The inner needle 2 is connected to the outer needle 1, and the outer needle 1 can move relative to the inner needle 2.

[0058] To further explain, the inner needle 2 has a cavity 21 inside, and the guide component 3 is disposed in the cavity 21. The guide component 3 can move in the cavity 21 along a first direction, wherein the first direction is the same as the axial direction of the inner needle 2. The first lifting component 4 includes a first end and a second end. The first end passes through the inner needle 2 and connects to the outer needle 1. That is, the first lifting component 4 and the inner needle 2 are slidably connected. The first lifting component 4 can slide relative to the inner needle 2 along a second direction. The first lifting component 4 and the outer needle 1 are fixedly connected. The second end abuts against the guide component 3.

[0059] The needle winding mechanism 100 includes a first state and a second state. In the first state, the first lifting component 4 abuts against the first position of the guide component 3. In the second state, the first lifting component 4 abuts against the second position of the guide component 3, and the first position is lower than the second position in the second direction. When the first state changes to the second state, the guide component 3 moves to the right along the first direction. Therefore, the first lifting component 4 moves relative to the inner needle 2 along the second direction, so as to drive the outer needle 1 to move away from the inner needle 2 along the second direction, thereby increasing the diameter of the outer needle 1. Conversely, when the second state changes to the first state, the diameter of the outer needle 1 will decrease.

[0060] The winding mechanism 100 in this embodiment achieves the outer needle 1 diameter change through the guide component 3 and the first lifting component 4, without the need for a cam groove, which means there is no problem of the inner needle 2 bolt easily falling off. Therefore, the winding mechanism 100 in this embodiment can avoid the problem of outer needle 1 diameter change failure due to the inner needle 2 bolt falling off, thereby improving the winding quality of the battery cell and the production efficiency of the battery cell.

[0061] In one specific implementation, such as Figure 1 As shown, the needle winding mechanism 100 includes a plurality of first lifting components 4, which are spaced apart along a first direction. By setting a plurality of first lifting components 4, the balance and stability of the outer needle 1 moving along the second direction can be improved, and the deviation of the outer needle 1 after the diameter changes can be avoided.

[0062] In one optional embodiment, the first direction and the third direction form a first plane, the guide component 3 includes a first guide surface 31, the first guide surface 31 and the first plane form a first included angle c; the first lifting component 4 includes a first rolling element 41 and a first push rod 42, one end of the first push rod 42 is connected to the first rolling element 41, the other end of the first push rod 42 passes through the inner needle 2 and is connected to the outer needle 1, the first rolling element 41 abuts against the first guide surface 31; the first direction intersects with the third direction, and the second direction intersects with the third direction.

[0063] like Figure 1As shown, the guide component 3 includes a first guide surface 31, which faces the outer needle 1 in a second direction; the axis of the first direction and the axis of the third direction form a first plane, and the first guide surface 31 and the first plane form a first angle c, that is, the first guide surface 31 is an inclined surface relative to the first plane; wherein, the first position and the second position are both located on the first guide surface 31.

[0064] To further explain, such as Figures 2-5 As shown, the first lifting assembly 4 includes a first rolling element 41 and a first lifting rod 42; wherein, one end of the first lifting rod 42 is rotatably connected to the first rolling element 41, the first rolling element 41 can rotate relative to the first lifting rod 42 about a third direction, and the first rolling element 41 abuts against the first guide surface 31; the other end of the first lifting rod 42 can pass through the inner needle 2 and connect to the outer needle 1, and the first lifting rod 42 can move relative to the inner needle 2 along a second direction.

[0065] Specifically, in the first state, the first rolling element 41 is located at the first position of the first guide surface 31; in the second state, the first rolling element 41 is located at the second position of the first guide surface 31. When the needle winding mechanism 100 changes from the first state to the second state, the guide component 3 moves to the right along the first direction, and the first guide surface 31 moves from the first position to the second position relative to the first rolling element 41. The first push rod 42 moves relative to the inner needle 2 along the second direction, thereby driving the outer needle 1 to move away from the inner needle 2 along the second direction, thereby increasing the diameter of the outer needle 1. Conversely, when the second state changes to the first state, the diameter of the outer needle 1 decreases. The outer needle 1 changes diameter by relative movement between the first rolling element 41 and the first guide surface 31. This structure is simple, the diameter change method is easy to operate, and it can prevent the outer needle 1 from failing to change diameter.

[0066] In one specific implementation, such as Figure 3 and Figure 4 As shown, the first rolling element 41 includes a first bearing 411, a second bearing 412, and a first rotating shaft 413. The first bearing 411 and the second bearing 412 are spaced apart along a third direction. One end of the first rotating shaft 413 is connected to the inner ring of the first bearing 411, and the other end of the first rotating shaft 413 is connected to the inner ring of the second bearing 412. One end of the first push rod 42 is connected to the first rotating shaft 413. The outer rings of both the first bearing 411 and the second bearing 412 are in contact with the first guide surface 31. When the guide assembly 3 moves along the first direction, the first bearing 411 and the second bearing 412 can rotate about a third direction, while the first push rod 42 will not rotate.

[0067] In one optional embodiment, the inner needle 2 is provided with a first receiving groove 24; the first lifting assembly 4 further includes a first bushing 43, the first bushing 43 being embedded in the first receiving groove 24, and the first push rod 42 being slidably connected to the first bushing 43.

[0068] like Figure 1 As shown, the inner needle 2 includes a first sidewall 22, which is close to the outer needle 1; the inner needle 2 is provided with a first receiving groove 24, which is located on the side of the first sidewall 22 facing the cavity 21, and a first through hole 26 is provided on the first sidewall 22, which communicates with the first receiving groove 24.

[0069] To further explain, such as Figure 3 , Figure 4 and Figure 5 As shown, the first lifting assembly 4 also includes a first bushing 43, which has a first channel and is embedded in the first receiving groove 24. The first channel and the first through hole 26 are concentrically arranged. The first push rod 42 passes through the first channel and the first through hole 26 and is connected to the outer pin 1. The first push rod 42 is slidably connected to the first channel and the first through hole 26. The first bushing 43 provides a guiding function for the first push rod 42 to prevent the first push rod 42 from getting stuck when it moves in the second direction.

[0070] Preferably, the first bushing 43 is a self-lubricating bushing, which can improve the smoothness of the movement of the first push rod 42 relative to the first channel.

[0071] In an optional embodiment, the first lifting assembly 4 further includes a first elastic element 44, which is sleeved on the first top rod 42 and is located between the first rolling element 41 and the first bushing 43.

[0072] like Figure 3 , Figure 4 and Figure 5 As shown, the first lifting assembly 4 also includes a first elastic element 44; the first push rod 42 is provided with a first protrusion 421 at one end near the first rolling element 41, the first elastic element 44 is sleeved on the first push rod 42, and the first elastic element 44 is located between the first protrusion 421 and the first bushing 43.

[0073] When the needle winding mechanism 100 changes from the first state to the second state, the first push rod 42 moves along the second direction, and the first protrusion 421 and the first bushing 43 work together to compress the first elastic element 44; when the needle winding mechanism 100 changes from the second state to the first state, the first push rod 42 moves under the elastic force of the first elastic element 44, and the first push rod 42 is reset.

[0074] The first elastic element 44 can be a compression spring.

[0075] In an optional embodiment, the needle winding mechanism 100 further includes a clamping component 6 and at least one second lifting component 5; the clamping component 6 is disposed on the side of the inner needle 2 away from the outer needle 1; one end of the second lifting component 5 is connected to the clamping component 6, and the other end of the second lifting component 5 abuts against the guide component 3; the guide component 3 reciprocates along the first direction, and the second lifting component 5 moves relative to the guide component 3 along the second direction to drive the clamping component 6 to move along the second direction.

[0076] like Figure 1 As shown, the needle winding mechanism 100 further includes a clamping assembly 6 and at least one second lifting assembly 5; wherein, the clamping assembly 6 is disposed on the side of the inner needle 2 away from the outer peripheral surface 11 of the outer needle 1; the second lifting assembly 5 includes a third end and a fourth end, the third end is connected to the clamping assembly 6, the fourth end is located in the cavity 21 of the inner needle 2, the fourth end abuts against the guide assembly 3, the second lifting assembly 5 is slidably connected to the inner needle 2, the second lifting assembly 5 can slide relative to the inner needle 2 in a second direction, and the second lifting assembly 5 is fixedly connected to the clamping assembly 6.

[0077] The guide component 3 includes a third position and a fourth position, with the third position being higher than the fourth position in the second direction. In the first state of the needle winding mechanism 100, the second lifting component 5 abuts against the third position of the guide component 3. In the second state of the needle winding mechanism 100, the second lifting component 5 abuts against the fourth position of the guide component 3. When the first state changes to the second state, the guide component 3 moves to the right along the first direction. Therefore, the second lifting component 5 moves relative to the inner needle 2 in the second direction away from the inner needle 2, which means it can drive the clamping component 6 to move in the second direction away from the inner needle 2. Conversely, when the second state changes to the first state, the clamping component 6 will move in the second direction towards the inner needle 2.

[0078] In the needle winding device 200, the clamping component 6 of one needle winding mechanism 100 works together with the clamping component 6 of another needle winding mechanism 100 to clamp the diaphragm; when the clamping component 6 moves away from the inner needle 2 in the second direction, that is, the clamping component 6 of one needle winding mechanism 100 and the clamping component 6 of another needle winding mechanism 100 will come closer to each other to clamp the diaphragm.

[0079] Compared to the driving direction using cam grooves in the prior art, in the embodiments of this application, the clamping component 6 is driven to move by the guide component 3 and the second lifting component 5, which can improve the movement stability of the clamping component 6.

[0080] In one optional embodiment, the guide assembly 3 further includes a second guide surface 32, which forms a second included angle d with the first plane; the second lifting assembly 5 includes a second rolling element 51 and a second push rod 52, one end of the second push rod 52 is connected to the second rolling element 51, the other end of the second push rod 52 is connected to the clamping assembly 6, and the second rolling element 51 abuts against the second guide surface 32.

[0081] like Figure 1 As shown, the guide component 3 also includes a second guide surface 32, which faces the clamping component 6 in the second direction. The second guide surface 32 and the first guide surface 31 face opposite directions in the second direction. The second guide surface 32 forms a second included angle d with the first plane, that is, the second guide surface 32 is an inclined surface relative to the first plane. The third position and the fourth position are both located on the second guide surface 32.

[0082] To further explain, such as Figure 6 and Figure 7 As shown, the second lifting assembly 5 includes a second rolling element 51 and a second lifting rod 52; wherein, one end of the second lifting rod 52 is rotatably connected to the second rolling element 51, the second rolling element 51 is able to rotate relative to the second lifting rod 52 about a third direction, and the second rolling element 51 abuts against the second guide surface 32; the other end of the second lifting rod 52 is connected to the clamping assembly 6, and the second lifting rod 52 is able to move relative to the inner needle 2 along a second direction.

[0083] Specifically, in the first state, the second rolling element 51 is located at the third position of the second guide surface 32; in the second state, the second rolling element 51 is located at the fourth position of the second guide surface 32. When the needle winding mechanism 100 changes from the first state to the second state, the guide component 3 moves to the right along the first direction, the second guide surface 32 moves from the third position to the fourth position relative to the second rolling element 51, and the second push rod 52 moves relative to the inner needle 2 along the second direction, thereby driving the clamping component 6 to move away from the inner needle 2 along the second direction; conversely, when the second state changes to the first state, the clamping component 6 moves towards the inner needle 6 along the second direction. The movement of the clamping component 6 is achieved by the relative movement between the second rolling element 51 and the second guide surface 32. This structure is simple and easy to operate.

[0084] In one specific implementation, such as Figure 7As shown, the second rolling element 51 includes a third bearing 511, a fourth bearing 512, and a second rotating shaft 513; the third bearing 511 and the fourth bearing 512 are spaced apart along a third direction, one end of the second rotating shaft 513 is connected to the inner ring of the third bearing 511, the other end of the second rotating shaft 513 is connected to the inner ring of the fourth bearing 512, one end of the second push rod 52 is connected to the second rotating shaft 513, and the outer rings of the third bearing 511 and the fourth bearing 512 are both in contact with the second guide surface 32; when the guide assembly 3 moves along the first direction, the third bearing 511 and the fourth bearing 512 can rotate around the third direction, while the second push rod 52 will not rotate.

[0085] In one optional embodiment, the inner needle 2 is provided with a second receiving groove 25; the second lifting assembly 5 further includes a second bushing 53, the second bushing 53 is embedded in the second receiving groove 25, and the second push rod 52 is slidably connected to the second bushing 53.

[0086] like Figure 1 and Figure 6 As shown, the inner needle 2 includes a second sidewall 23, which is disposed opposite to the first sidewall 22 in a second direction. The second sidewall 23 is close to the clamping assembly 6. The inner needle 2 is provided with a second receiving groove 25, which is located on the side of the second sidewall 23 facing the cavity 21. A second through hole 27 is provided on the second sidewall 23, which communicates with the second receiving groove 25.

[0087] To further explain, such as Figure 6 and Figure 7 As shown, the second lifting assembly 5 also includes a second bushing 53, which has a second channel and is embedded in the second receiving groove 25. The second channel and the second through hole 27 are concentrically arranged. The second push rod 52 passes through the second channel and is slidably connected to the second channel. The clamping assembly 6 passes through the second through hole 27 and is connected to the second push rod 52. The second bushing 53 provides a guiding function for the second push rod 52 to prevent jamming when the second push rod 52 moves in the second direction.

[0088] Preferably, the second bushing 53 is a self-lubricating bushing, which can improve the smoothness of the movement of the second push rod 52 relative to the second channel.

[0089] In an optional embodiment, the second lifting assembly 5 further includes a second elastic element 54, which is sleeved on the second top rod 52 and is located between the second rolling element 51 and the second bushing 53.

[0090] like Figure 6 and Figure 7As shown, the second lifting assembly 5 also includes a second elastic member 54; a second protrusion 521 is provided around one end of the second push rod 52 near the second rolling member 51, and the second elastic member 54 is sleeved on the second push rod 52, with the second elastic member 54 located between the second protrusion 521 and the second bushing 53.

[0091] When the needle winding mechanism 100 changes from the first state to the second state, the second push rod 52 moves along the second direction, and the second protrusion 521 and the second bushing 53 work together to compress the second elastic element 54; when the needle winding mechanism 100 changes from the second state to the first state, the second push rod 52 moves under the elastic force of the second elastic element 54, and the second push rod 52 is reset.

[0092] The second elastic element 54 can be a compression spring.

[0093] In an optional embodiment, the second lifting assembly 5 further includes a third elastic element 55; the second lifting rod 52 has a receiving cavity 522, one end of the clamping assembly 6 is embedded in the receiving cavity 522, and the third elastic element 55 is disposed in the receiving cavity 522 and located between the clamping assembly 6 and the top wall of the receiving cavity 522.

[0094] like Figure 7 As shown, a receiving cavity 522 is provided inside the second push rod 52, and the opening of the receiving cavity 522 faces the clamping assembly 6; one end of the clamping assembly 6 is embedded in the receiving cavity 522, and the side of the receiving cavity 522 away from the opening is the top wall of the receiving cavity 522.

[0095] To further explain, the second lifting assembly 5 also includes a third elastic element 55, which is disposed within the receiving cavity 522 and located between the clamping assembly 6 and the top wall of the receiving cavity 522. Specifically, if it is still necessary to increase the diameter of the outer needle 1 after the clamping assembly 6 clamps the diaphragm, the guide assembly 3 continues to move to the right along the first direction, and the first lifting assembly 4 drives the outer needle 1 to move away from the inner needle 2 along the second direction to increase the diameter of the outer needle 1. The second lifting assembly 5 drives the clamping assembly 6 to move away from the inner needle 2 along the second direction. Since the clamping assembly 6 has already clamped the diaphragm, the clamping assembly 6 is subjected to a force along the second direction towards the inner needle 2. The clamping assembly 6 will compress the third elastic element 55 located in the receiving cavity 522, thereby enabling the diameter of the outer needle 1 to continue to increase. By providing the third elastic element 55, the adjustable range of the diameter of the outer needle 1 is increased.

[0096] In one alternative embodiment, the clamping assembly 6 includes a pressure plate 61 and a connector 62. The connector 62 includes a first connecting end 621 and a second connecting end 622. The pressure plate 61 has a mounting groove 611. The first connecting end 621 is embedded in the mounting groove 611, and the second connecting end 622 is embedded in the receiving cavity 522.

[0097] like Figure 7 As shown, the clamping assembly 6 includes a pressure plate 61 and a connector 62; wherein, the connector 62 includes a first connecting end 621 and a second connecting end 622; the pressure plate 61 has an installation groove 611, and the first connecting end 621 is embedded in the installation groove 611, thereby realizing the connection between the pressure plate 61 and the connector 62. Since the pressure plate 61 and the connector 62 are connected by an embedded method, there is no need for the pressure plate 61 and the connector 62 to be connected by bolts, thus avoiding the problem of bolts falling off.

[0098] To further explain, the second connecting end 622 is embedded in the receiving cavity 522 to connect with the second push rod 52.

[0099] like Figures 8-10 As shown, according to a second aspect of the embodiments of this application, a needle winding device 200 is provided, including two needle winding mechanisms 100 as described above and a driving mechanism 7; the two needle winding mechanisms 100 are a first needle winding mechanism 100a and a second needle winding mechanism 100b, and the first needle winding mechanism 100a and the second needle winding mechanism 100b are spaced apart; the driving mechanism 7 is capable of driving the guide component 3 of the first needle winding mechanism 100a and the guide component 3 of the second needle winding mechanism 100b to move along a first direction.

[0100] like Figures 8-10 As shown, the needle winding device 200 includes two needle winding mechanisms 100, namely a first needle winding mechanism 100a and a second needle winding mechanism 100b; the first needle winding mechanism 100a and the second needle winding mechanism 100b are arranged at intervals, and a gap 9 is formed between the first needle winding mechanism 100a and the second needle winding mechanism 100b; the clamping component 6 of the first needle winding mechanism 100a and the clamping component 6 of the second needle winding mechanism 100b are arranged adjacent to each other, and the outer peripheral surface 11 of the outer needle 1 of the first needle winding mechanism 100a and the outer peripheral surface 11 of the outer needle 1 of the second needle winding mechanism 100b work together to wind the battery cell.

[0101] To further explain, the needle winding device 200 also includes a drive mechanism 7, the drive end of which can drive the guide component 3 of the first needle winding mechanism 100a and the guide component 3 of the second needle winding mechanism 100b to move along a first direction.

[0102] Preferably, the needle winding device 200 further includes a fourth elastic element 8. The driving mechanism 7 drives the guide component 3 of the first needle winding mechanism 100a and the guide component 3 of the second needle winding mechanism 100b to move to the right along the first direction, which can compress the fourth elastic element 8. After the driving mechanism 7 is reset, the guide component 3 of the first needle winding mechanism 100a and the guide component 3 of the second needle winding mechanism 100b can be reset under the action of the elastic force of the fourth elastic element 8.

[0103] The working process of the needle winding device 200 is as follows: the drive mechanism 7 drives the guide component 3 of the first needle winding mechanism 100a and the guide component 3 of the second needle winding mechanism 100b to move to the right along the first direction; the first lifting component 4 of the first needle winding mechanism 100a drives the outer needle 1 to move away from the inner needle 2 along the second direction; the first lifting component 4 of the second needle winding mechanism 100b drives the outer needle 1 to move away from the inner needle 2 along the second direction, thereby increasing the diameter of the outer needle 1; at the same time, the second lifting component 5 of the first needle winding mechanism 100a drives the clamping component 6. Moving away from the inner needle 2 along the second direction, the second lifting component 5 of the second winding needle mechanism 100b drives the clamping component 6 to move away from the inner needle 2 along the second direction. That is, the clamping component 6 of the first winding needle mechanism 100a and the clamping component 6 of the second winding needle mechanism 100b move towards each other, so that the diaphragm can be clamped by the clamping component 6 of the first winding needle mechanism 100a and the clamping component 6 of the second winding needle mechanism 100b. After the outer needle 1 diameter change and the clamping component 6 clamping the diaphragm are completed, the winding needle device 200 can start winding the battery cell until the battery cell is wound. After the battery cell is wound, the drive mechanism 7 returns to its initial position. The guide components 3 of the first winding needle mechanism 100a and the second winding needle mechanism 100b move to the left along the first direction under the action of the fourth elastic member 8, thus resetting the guide components 3 of the first winding needle mechanism 100a and the second winding needle mechanism 100b. The first push rod 42 of the first lifting component 4 is reset under the action of the elastic force of the first elastic member 44, that is, the outer needle 1 is reset. The second push rod 52 of the second lifting component 5 is reset under the action of the elastic force of the second elastic member 54, that is, the clamping component 6 is reset.

[0104] Preferably, the needle winding device 200 further includes a control system, which is communicatively connected to the drive mechanism 7. The control system can control the drive mechanism 7 to drive the guide component 3 to move, so as to achieve the purpose of increasing or decreasing the diameter of the outer needle 1.

[0105] According to a third aspect of the embodiments of this application, a winding device is provided, including the above-described needle winding mechanism 100; or the above-described needle winding device 200.

[0106] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A needle winding mechanism, characterized in that, include: Outer needle (1), the outer peripheral surface (11) of the outer needle (1) is used for winding the battery cell; Inner needle (2), the inner needle (2) is connected to the outer needle (1), the outer needle (1) is capable of radial movement relative to the inner needle (2); Guide component (3), the guide component (3) is disposed inside the inner needle (2); At least one first lifting component (4) has one end passing through the inner needle (2) and connected to the outer needle (1), and the other end of the first lifting component (4) abuts against the guide component (3). The guide component (3) is capable of reciprocating along a first direction, and the first lifting component (4) reciprocates relative to the guide component (3) along a second direction to drive the outer needle (1) to reciprocate along the second direction. The first direction intersects with the second direction.

2. The needle winding mechanism according to claim 1, characterized in that, The first direction and the third direction form a first plane, and the guide component (3) includes a first guide surface (31), and the first guide surface (31) forms a first included angle (c) with the first plane. The first lifting assembly (4) includes a first rolling element (41) and a first push rod (42). One end of the first push rod (42) is connected to the first rolling element (41), and the other end of the first push rod passes through the inner needle (2) and is connected to the outer needle (1). The first rolling element (41) abuts against the first guide surface (31). The first direction intersects with the third direction, and the second direction intersects with the third direction.

3. The needle winding mechanism according to claim 2, characterized in that, The inner needle (2) is provided with a first receiving groove (24); The first lifting assembly (4) further includes a first bushing (43), which is embedded in the first receiving groove (24), and the first push rod (42) is slidably connected to the first bushing (43).

4. The needle winding mechanism according to claim 3, characterized in that, The first lifting assembly (4) further includes a first elastic element (44), which is sleeved on the first top rod (42) and is located between the first rolling element (41) and the first bushing (43).

5. The needle winding mechanism according to claim 2, characterized in that, The needle winding mechanism (100) further includes: A clamping assembly (6) is provided on the side of the inner needle (2) away from the outer needle (1); At least one second lifting component (5) is provided, one end of which passes through the inner pin (2) and is connected to the clamping component (6), and the other end of which abuts against the guide component (3). The guide component (3) reciprocates along the first direction, and the second lifting component (5) moves relative to the guide component (3) along the second direction to drive the clamping component (6) to move along the second direction.

6. The needle winding mechanism according to claim 5, characterized in that, The guide component (3) further includes a second guide surface (32), which forms a second included angle (d) with the first plane. The second lifting assembly (5) includes a second rolling element (51) and a second push rod (52). One end of the second push rod (52) is connected to the second rolling element (51), and the other end of the second push rod (52) is connected to the clamping assembly (6). The second rolling element (51) abuts against the second guide surface (32).

7. The needle winding mechanism according to claim 6, characterized in that, The inner needle (2) is provided with a second receiving groove (25); The second lifting assembly (5) also includes a second bushing (53), which is embedded in the second receiving groove (25), and the second push rod (52) is slidably connected to the second bushing (53).

8. The needle winding mechanism according to claim 7, characterized in that, The second lifting assembly (5) further includes a second elastic element (54), which is sleeved on the second top rod (52) and is located between the second rolling element (51) and the second bushing (53).

9. The needle winding mechanism according to claim 6, characterized in that, The second lifting assembly (5) also includes a third elastic element (55); The second push rod (52) has a receiving cavity (522), one end of the clamping assembly (6) is embedded in the receiving cavity (522), and the third elastic member (55) is provided in the receiving cavity (522) and is located between the clamping assembly (6) and the inner wall of the receiving cavity (522).

10. The needle winding mechanism according to claim 9, characterized in that, The clamping assembly (6) includes a pressure plate (61) and a connector (62). The connector (62) includes a first connecting end (621) and a second connecting end (622). The pressure plate (61) has an installation groove (611). The first connecting end (621) is embedded in the installation groove (611), and the second connecting end (622) is embedded in the receiving cavity (522).

11. A needle winding device, characterized in that, include: Two needle winding mechanisms (100) as described in any one of claims 1-10 are a first needle winding mechanism (100a) and a second needle winding mechanism (100b), wherein the first needle winding mechanism (100a) and the second needle winding mechanism (100b) are arranged at intervals; The driving mechanism (7) is capable of driving the guide component (3) of the first needle winding mechanism (100a) and the guide component (3) of the second needle winding mechanism (100b) to move along a first direction.

12. A winding device, characterized in that, include: The needle winding mechanism (100) as described in any one of claims 1-10; or The needle winding device (200) as described in claim 11.

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