Coil needle and battery cell winding device

Abstract

The application relates to the technical field of battery processing equipment, in particular to a winding needle and a battery cell winding equipment. The winding needle comprises a winding needle body, the winding needle body is provided with an accommodating space, and a clamping assembly is arranged on the winding needle body and located in the accommodating space. The clamping assembly comprises a first clamping piece, the first clamping piece is movably arranged along a first direction to approach or move away from a second clamping surface. The second clamping surface is formed on the clamping assembly and is located upstream of the first clamping piece along the winding direction of the winding needle body. The second clamping surface is provided with an anti-skid piece. The winding needle provided by the application has a relatively flat starting end of the winding core, so that the quality of the winding core is better.

Description

Technical Field

[0001] This application relates to the field of battery processing equipment technology, and in particular to a winding needle and battery cell winding equipment. Background Technology

[0002] A battery cell winding machine is a device that produces battery cores through a winding process. Specifically, a battery cell winding machine typically includes a winding needle. As the winding needle rotates, it winds the material strip (electrode sheet or separator, etc.) around itself to produce the aforementioned battery core. However, in battery cores produced by winding needles in related technologies, wrinkles often appear at the starting end (the end closest to the core axis), affecting the quality of the battery core. Utility Model Content

[0003] This application discloses a winding needle and a battery core winding device, which can make the starting end of the core relatively flat, thereby improving the quality of the core.

[0004] To achieve the above objectives, firstly, this application discloses a coiled needle, comprising: A needle winding body, wherein a receiving space is formed on the needle winding body; and, A clamping assembly is disposed on the needle coil body and located within the receiving space. The clamping assembly includes a first clamping member, which is movably disposed along a first direction toward or away from a second clamping surface. The second clamping surface is formed on the clamping assembly along the winding direction of the needle coil body. The second clamping surface is located upstream of the first clamping member, and an anti-slip element is provided on the second clamping surface.

[0005] Before the pusher reaches the clamping assembly, the clamping assembly is in a clamping state. When the pusher pushes the starting end of the material strip along the second direction to the clamping assembly, the pusher causes the first clamping member to move away from the second clamping surface along the first direction, thereby opening the clamping assembly. Then, as the pusher moves away from the clamping assembly, the first clamping member can move towards the second clamping surface along the first direction, thereby restoring the clamping assembly to the clamping state, thus achieving the purpose of clamping the starting end of the material strip between the first and second clamping surfaces.

[0006] In other words, as the pusher moves away from the clamping assembly, the first clamping member can move along the first direction toward the second clamping surface, thereby clamping the starting end of the strip to the clamping assembly. Compared to the related technology where the pusher can only leave the clamping assembly after the starting end of the strip is clamped, this avoids the pusher interfering with or causing localized abnormal lifting of the starting end of the strip during the process of the clamping assembly switching from the open state to the clamping state. This prevents wrinkles from forming at the starting end of the strip, resulting in better core quality.

[0007] Furthermore, since the pusher can open the clamping assembly when it pushes the starting end of the strip to the clamping assembly, thus providing a sufficiently large space for the pusher to enter, the first clamping assembly can be a complete plate structure. It does not require multiple clearance notches for the pusher to enter, and the pusher can also be a single plate structure, without the need for a rake-like structure to match multiple clearance notches. In this way, when the starting end of the strip is clamped between the first and second clamping surfaces, the clamping force from the first clamping assembly at each position of the starting end of the strip will be approximately equal. This avoids the situation in related technologies where the force is less at the position corresponding to the notch and greater at other positions, thus preventing wrinkles at the starting end of the strip and resulting in a flatter starting end, leading to better core quality.

[0008] Furthermore, since the second clamping surface is located upstream of the first clamping member along the winding direction of the needle body, when the pusher pushes the starting end of the strip into the space between the first clamping member and the second clamping surface, the starting end of the strip will be located between the pusher and the second clamping surface. Based on this, by providing an anti-slip element on the second clamping surface, the friction between the starting end of the strip and the second clamping surface can be significantly increased, thereby avoiding or reducing the possibility that the starting end of the strip will slip out from between the second clamping surface and the first clamping member.

[0009] Optionally, the anti-slip component is a rubber-coated component.

[0010] Optionally, the clamping assembly further includes a pre-tensioning member connected to the first clamping member.

[0011] Optionally, the preload member is used to provide a preload force to the first clamping member that moves toward the second clamping surface in a first direction, so that the first clamping member abuts against the second clamping surface and the clamping assembly is in a clamping state.

[0012] Optionally, the anti-slip component is a rubber-coated component.

[0013] Optionally, the clamping assembly further includes: A second clamping member is provided opposite to the first clamping member along the first direction, and at least one of the second clamping member and the first clamping member is movably disposed along the first direction toward or away from the other, and a second clamping surface is formed on the second clamping member. The preload member is connected to at least one of the second clamping member and the first clamping member, and the preload member is used to provide a preload force to at least one of the second clamping member and the first clamping member that moves toward the other in the first direction, so that the first clamping member abuts against the second clamping surface.

[0014] Optionally, the clamping assembly further includes: A guide rod is connected to the needle coil body and extends along the first direction, and the first clamping member and / or the second clamping member are movably sleeved on the guide rod along the extension direction of the guide rod.

[0015] Optionally, the second clamping member is fixed to the needle coil body, and the first clamping member is movably disposed along the first direction toward or away from the second clamping member. The pre-tightening member is an elastic member, and the elastic member is connected between the second clamping member and the first clamping member.

[0016] Optionally, the clamping assembly further includes: A first support member is located on the side of the second clamping member opposite to the first clamping member, and the second clamping member is provided with a first through hole extending through the second clamping member along the first direction; and... The second support member is located on the side of the first clamping member opposite to the second clamping member, and the first clamping member is provided with a second through hole that penetrates the first clamping member along the first direction; The elastic element passes through the first through hole and the second through hole, with one end of the elastic element connected to the first support and the other end connected to the second support.

[0017] Optional: The second clamping member has a first receiving groove on the side facing away from the first clamping member, the first receiving groove communicating with the first through hole, and the first support member being received in the first receiving groove; and / or, the first clamping member has a second receiving groove on the side facing away from the second clamping member, the second receiving groove communicating with the second through hole, and the second support member being received in the second receiving groove.

[0018] Optionally, the first clamping member has a concave-convex structure on the side facing the second clamping surface.

[0019] Optionally, the clamping assembly includes at least two clamping assemblies arranged circumferentially along the needle coil body.

[0020] Optionally, the coiling needle body includes: First half stitch; The second half needle is arranged opposite to the first half needle along the first direction at a distance, and the receiving space is formed between the first half needle and the second half needle.

[0021] Secondly, this application discloses a battery cell winding device, including any of the winding needles described in the first aspect above.

[0022] Optionally, it also includes: The feeding assembly includes a cutter, a pusher, and a drive unit, wherein the pusher is connected to the drive unit; Along the winding direction of the needle body, the cutter is located downstream of the pusher.

[0023] Optionally, the driving member is used to drive the pushing member to move in a second direction toward the needle coil body, the cutter is used to cut the strip to form a starting end, and the pushing member is used to push the starting end of the strip into the space between the second clamping surface and the first clamping member through the opening of the receiving space.

[0024] Optionally, the driving member is further configured to drive the pushing member to move away from the needle coil body and away from the clamping assembly in a second direction, and the pre-tightening member is configured to provide a pre-tightening force to the first clamping member that moves in a first direction, so that the clamping assembly is in a clamping state.

[0025] Optionally, the pusher includes: The first abutting surface faces the cutter; The second abutting surface is disposed opposite to the first abutting surface; The pusher is driven along the second direction by the drive member to move closer to the needle body, and the distance between the first contact surface and the second contact surface gradually decreases.

[0026] Optionally, an air blowing hole is provided on the second contact surface.

[0027] Optionally, during the process of the pusher entering between the first clamping member and the second clamping surface, and during the process of leaving between the first clamping member and the second clamping surface, the pusher remains in contact with the second clamping surface.

[0028] Optionally, during the process of the pusher entering between the first clamping member and the second clamping surface, and leaving between the first clamping member and the second clamping surface, the second abutting surface remains in contact with the second clamping surface.

[0029] Compared with the prior art, the beneficial effects of this application are as follows: In this application, the clamping assembly is in a clamping state before the pushing member reaches the clamping assembly. When the pushing member pushes the starting end of the material strip along the second direction to the clamping assembly, the pushing member causes the first clamping member to move away from the second clamping surface along the first direction, thereby opening the clamping assembly. Then, as the pushing member moves away from the clamping assembly, the first clamping member can move towards the second clamping surface along the first direction, thereby restoring the clamping assembly to the clamping state, thus achieving the purpose of clamping the starting end of the material strip between the first and second clamping surfaces.

[0030] In other words, as the pusher moves away from the clamping assembly, the first clamping member can move along the first direction toward the second clamping surface, thereby clamping the starting end of the strip to the clamping assembly. Compared to the related technology where the pusher can only leave the clamping assembly after the starting end of the strip is clamped, this avoids the pusher interfering with or causing localized abnormal lifting of the starting end of the strip during the process of the clamping assembly switching from the open state to the clamping state. This prevents wrinkles from forming at the starting end of the strip, resulting in better core quality.

[0031] Furthermore, since the pusher can open the clamping assembly when it pushes the starting end of the strip to the clamping assembly, thus providing a sufficiently large space for the pusher to enter, the first clamping assembly can be a complete plate structure. It does not require multiple clearance notches for the pusher to enter, and the pusher can also be a single plate structure, without the need for a rake-like structure to match multiple clearance notches. In this way, when the starting end of the strip is clamped between the first and second clamping surfaces, the clamping force from the first clamping assembly at each position of the starting end of the strip will be approximately equal. This avoids the situation in related technologies where the force is less at the position corresponding to the notch and greater at other positions, thus preventing wrinkles at the starting end of the strip and resulting in a flatter starting end, leading to better core quality.

[0032] Furthermore, since the second clamping surface is located upstream of the first clamping member along the winding direction of the needle body, when the pusher pushes the starting end of the strip into the space between the first clamping member and the second clamping surface, the starting end of the strip will be located between the pusher and the second clamping surface. Based on this, by providing an anti-slip element on the second clamping surface, the friction between the starting end of the strip and the second clamping surface can be significantly increased, thereby avoiding or reducing the possibility that the starting end of the strip will slip out from between the second clamping surface and the first clamping member.

[0033] By forming the second clamping surface on the clamping assembly, when the first clamping member is movable towards the second clamping surface in the first direction, the material strip can be clamped through the cooperation between the first clamping member and the second clamping surface. That is, the material strip can be clamped through the structure of the clamping assembly itself, without the need for a structure outside the clamping assembly. Therefore, there is no need to set up a special structure outside the clamping assembly for cooperating with the first clamping member to clamp the material strip, thereby simplifying the entire needle winding structure. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a coiling needle provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the structure of the clamping component; Figure 3 yes Figure 2 A schematic diagram of the clamping components from another perspective; Figure 4 yes Figure 1 A schematic diagram of the structure of the winding needles used in battery cell winding equipment; Figure 5 yes Figure 4 A schematic diagram of the structure of the cell winding equipment in the middle when the pusher reaches the contact point between the second clamping member and the first clamping member; Figure 6 yes Figure 4 A schematic diagram of the structure of the battery cell winding equipment when the pusher enters between the second clamping member and the first clamping member; Figure 7 yes Figure 4 A schematic diagram of the structure of the battery cell winding equipment after the pusher separates from the second clamping member and the first clamping member; Figure 8 This is a schematic diagram of another coiling needle structure provided in one embodiment of this application; Figure 9 yes Figure 3 Schematic diagram of the structure of the second clamping component; Figure 10 yes Figure 3 A schematic diagram of the structure of the first clamping component; Figure 11 This is a schematic diagram of the structure of another type of coiling needle provided in an embodiment of this application; Figure 12 yes Figure 4 Schematic diagram of the middle pusher component; Figure 13 yes Figure 12 A schematic diagram of the pusher component from another perspective.

[0036] Explanation of reference numerals in the attached figures: 1-The main body of the coiled needle; 10-The receiving space; 101-The opening of the receiving space; 11-The first half needle; 12-The second half needle; 2-Clamping assembly; 21-Second clamping member; 211-First through hole; 212-First receiving groove; 213-Anti-slip member; 214-Second clamping surface; 22-First clamping member; 220-Guide portion; 221-Second through hole; 222-Second receiving groove; 223-Concave-convex structure; 224-First clamping surface; 225-Outer side end; 23-Pre-tightening member; 24-Guide rod; 25-First support member; 26-Second support member; 100-coil needles; 200-Battery cell winding equipment; 2001-Feeding assembly; 2002-Cutter; 2002a-Cutter groove; 2003-Pushing component; 2003a-First abutting surface; 2003b-Second abutting surface; 2003c-Air blowing hole; 2004-Driver component; F1 - Winding direction; L - Material strip; W - Feeding station. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0041] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0042] Before explaining the technical solution of this application, the background technology of this application shall be explained first.

[0043] A battery cell winding machine is a device that produces battery cells by winding. Specifically, a battery cell winding machine typically includes a winding needle, which, when rotating, winds a strip of material (electrode sheets or separators, etc.) around itself to produce the aforementioned battery cell. However, in the case of battery cells produced by winding needles in related technologies, wrinkles often appear at the starting end (the end closest to the core axis), affecting the quality of the battery cell. Therefore, this application provides a new winding needle and a battery cell winding machine to solve the above problems.

[0044] The technical solution of this application will be described below with reference to specific embodiments and accompanying drawings.

[0045] Figure 1 This is a schematic diagram of the structure of a coiling needle 100 provided in one embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the structure of the clamping component 2. Figure 3 yes Figure 2 A schematic diagram of the clamping component 2 from another perspective.

[0046] See Figure 1 , Figure 2 and Figure 3 The needle winding 100 includes a needle winding body 1 and a clamping assembly 2. The needle winding body 1 has a receiving space 10. The clamping assembly 2 is disposed on the needle winding body 1 and located within the receiving space 10. The clamping assembly 2 includes a first clamping member 22 and a pre-tightening member 23. The first clamping member 22 is positioned along a first direction (…). Figure 2 The clamping assembly 22 is movably disposed in the Z-axis direction toward or away from the second clamping surface 214. The pre-tightening member 23 is connected to the first clamping member 22 and is used to provide the first clamping member 22 with a pre-tightening force that moves toward the second clamping surface 214 in the first direction so that the clamping assembly 2 is in a clamping state.

[0047] The second clamping surface 214 is formed on the clamping assembly 2, along the winding direction F1 of the needle body 1. The second clamping surface 214 is located upstream of the first clamping member 22, and an anti-slip member 213 is provided on the second clamping surface 214.

[0048] Figure 4 yes Figure 1 A schematic diagram of the structure of the winding needle 100 applied to the cell winding equipment 200 is shown in the figure. Figure 1 and Figure 4 The accommodating space 10 is used to allow the pusher 2003 to move along the second direction ( Figure 4 The starting end of the material strip L is pushed through the opening 101 of the accommodating space to the clamping assembly 2 in the X-axis direction. When the pusher 2003 reaches the clamping assembly 2, the pusher 2003 can overcome the pre-tightening force of the pre-tightening member 23, causing the first clamping member 22 to move away from the second clamping surface 214 in the first direction, thereby making the clamping assembly 2 open. At the same time, the pusher 2003 can push the starting end of the material strip L into the space between the first clamping member 22 and the second clamping surface 214.

[0049] When the clamping assembly 2 is in the open state, as the pusher 2003 moves away from the clamping assembly 2, the pre-tightening member 23 can provide a pre-tightening force to the first clamping member 22 in the first direction toward the second clamping surface 214, so that the first clamping member 22 abuts against the second clamping surface 214 and the clamping assembly 2 is in the clamping state, thereby achieving the purpose of clamping the starting end of the material strip L between the first clamping member 22 and the second clamping surface 214.

[0050] Since the clamping component 2 is located on the needle winding body 1 and within the accommodating space 10, the possibility of the clamping component 2 protruding from the peripheral wall of the needle winding body 1 can be minimized. This ensures that the material strip L will not be interfered with by the clamping component 2 when it is wound around the needle winding body 1, thus allowing the material strip L to be wound more evenly around the needle winding body 1, resulting in better quality of the core.

[0051] Furthermore, since the pre-tensioning member 23 is connected to the first clamping member 22, and the pre-tensioning member 23 can provide the first clamping member 22 with a pre-tensioning force that moves in the first direction toward the second clamping surface 214, the clamping assembly 2 can be in a clamping state before the pushing member 2003 reaches the clamping assembly 2. When the pushing member 2003 pushes the starting end of the material strip L in the second direction to the clamping assembly 2, the pushing member 2003 can overcome the pre-tensioning force of the pre-tensioning member 23, causing the first clamping member 22 to move in the first direction away from the second clamping surface 214, thereby causing the clamping assembly 2 to be in an open state. Then, as the pushing member 2003 moves away from the clamping assembly 2, the pre-tensioning member 23 can provide the first clamping member 22 with a pre-tensioning force that moves in the first direction toward the second clamping surface 214, thereby causing the clamping assembly 2 to return to the clamping state, thus achieving the purpose of clamping the starting end of the material strip L between the first clamping member 22 and the second clamping surface 214.

[0052] In other words, as the pusher 2003 moves away from the clamping assembly 2, the starting end of the strip L can be clamped in the clamping assembly 2 under the action of the pre-tightening member 23. Compared with the related technology where the pusher 2003 can only move away from the clamping assembly 2 after the starting end of the strip L is clamped in the clamping assembly 2, this avoids the pusher 2003 causing interference or local abnormal lifting to the starting end of the strip L during the process of the clamping assembly 2 switching from the open state to the clamping state. This can prevent wrinkles from appearing at the starting end of the strip L, thereby improving the quality of the core.

[0053] Furthermore, when the pusher 2003 pushes the starting end of the material strip L to the clamping assembly 2, the pusher 2003 can overcome the pre-tightening force of the pre-tightening member 23, causing the clamping assembly 2 to open. This provides the clamping assembly 2 with a sufficiently large space for the pusher 2003 to enter. Therefore, the first clamping member 22 can be a complete plate structure, and there is no need to design multiple clearance notches for the pusher 2003 to enter on the first clamping member 22. The pusher 2003 can also be a complete plate structure, without the need to design multiple clearance notches. The rake-like structure, which is matched with the clearance notch, ensures that when the starting end of the strip L is clamped between the first clamping member 22 and the second clamping surface 214, the clamping force from the first clamping member 22 at each position of the starting end of the strip L will be approximately equal. This avoids the situation in related technologies where the force is small at the position corresponding to the notch and large at other positions, thus preventing wrinkles from appearing at the starting end of the strip L and making the starting end of the strip L relatively flat, thereby improving the quality of the core.

[0054] Furthermore, since the second clamping surface 214 is located upstream of the first clamping member 22 along the winding direction F1 of the needle body 1, when the pusher 2003 pushes the starting end of the material strip L into the space between the first clamping member 22 and the second clamping surface 214, the starting end of the material strip L will be located between the pusher 2003 and the second clamping surface 214. Based on this, by providing an anti-slip member 213 on the second clamping surface 214, the friction between the starting end of the material strip L and the second clamping surface 214 can be significantly increased, thereby avoiding or reducing the possibility that the starting end of the material strip L will slip out from between the second clamping surface 214 and the first clamping member 22.

[0055] By forming the second clamping surface 214 on the clamping assembly 2, when the first clamping member 22 is movable towards the second clamping surface 214 in the first direction, the material strip L can be clamped through the cooperation between the first clamping member 22 and the second clamping surface 214. That is, the material strip L can be clamped through the structure of the clamping assembly 2 itself, without the need for a structure outside the clamping assembly 2. Therefore, there is no need to set up a special structure outside the clamping assembly 2 for cooperating with the first clamping member 22 to clamp the material strip L, thereby simplifying the entire needle winding 100 structure.

[0056] The aforementioned anti-slip component 213 can be a rubber-coated component or any other possible structure, as long as it can increase the friction between the starting end of the material strip L and the second clamping surface 214. This embodiment does not limit this.

[0057] In some embodiments, the anti-slip component 213 may be a rubber-coated component.

[0058] The aforementioned coated parts are composite parts formed by coating one elastic material (usually rubber, silicone or thermoplastic elastomer, etc.) onto the surface of another material (called the substrate, usually hard plastic or metal) through a specific process (such as injection molding or compression molding). They have the advantages of high friction and good elasticity. Therefore, by making the anti-slip part 213 a coated part, the friction of the second clamping surface 214 can be increased, thereby avoiding or reducing the possibility that the starting end of the strip L will slip out between the second clamping surface 214 and the first clamping part 22.

[0059] Because the rubber-coated parts have high friction and low cost, the cost of the anti-slip parts 213 can be reduced while significantly improving the friction of the second clamping surface 214.

[0060] Of course, in other embodiments, the anti-slip component 213 may also be other possible structures, such as rubber or silicone components, etc. This embodiment does not limit this.

[0061] When the second clamping surface 214 can also be formed on the clamping assembly 2, the first clamping member 22 can achieve the purpose of clamping by cooperating with the second clamping member 21.

[0062] When the first clamping member 22 achieves the clamping purpose by cooperating with the second clamping member 21, specifically, in some embodiments, see... Figure 1 , Figure 2 and Figure 4 The clamping assembly 2 further includes a second clamping member 21, which is opposite to the first clamping member 22 along a first direction, and at least one of the second clamping member 21 and the first clamping member 22 is movably disposed along the first direction toward or away from the other. The second clamping surface 214 is formed on the second clamping member 21. A pre-tightening member 23 is connected to at least one of the second clamping member 21 and the first clamping member 22. The pre-tightening member 23 is used to provide a pre-tightening force to at least one of the second clamping member 21 and the first clamping member 22 that moves toward the other along the first direction, so that the first clamping member 22 abuts against the second clamping surface 214.

[0063] In this embodiment, since the pre-tightening member 23 is connected to at least one of the second clamping member 21 and the first clamping member 22, the second clamping member 21 and the first clamping member 22 are opposite to each other along the first direction, and at least one of the second clamping member 21 and the first clamping member 22 is movably disposed along the first direction toward or away from the other, and the second clamping surface 214 is formed on the second clamping member 21, the pre-tightening member 23 can provide a spring force to at least one of the second clamping member 21 and the first clamping member 22 to move toward the other along the first direction, so that the second clamping member 21 and the first clamping member 22 are in a state of mutual contact along the first direction. Figure 4 (Medium state).

[0064] Figure 5 yes Figure 4 A schematic diagram of the structure of the battery cell winding device 200 when the pusher 2003 reaches the contact point between the second clamping member 21 and the first clamping member 22, see [reference]. Figure 5 When the second clamping member 21 and the first clamping member 22 are in contact with each other along the first direction, and when it is necessary to wind the core by the winding needle 100, firstly, the pushing member 2003 can push the starting end of the material strip L along the second direction ( Figure 4 The pusher 2003 moves towards the clamping assembly 2 in the negative direction of the X-axis, so that it reaches the contact point between the second clamping member 21 and the first clamping member 22 through the opening 101 of the receiving space. Figure 5 (Medium state).

[0065] Figure 6 yes Figure 4 A schematic diagram of the structure of the battery cell winding device 200 when the pusher 2003 enters between the second clamping member 21 and the first clamping member 22, see [reference]. Figure 6 After the pusher 2003 reaches the contact point between the second clamping member 21 and the first clamping member 22, as the pusher 2003 continues along the second direction ( Figure 6 The pusher 2003 will overcome the elastic force of the preload 23, causing at least one of the second clamping member 21 and the first clamping member 22 to move along the first direction (negative X-axis direction). Figure 6 (In the Z-axis direction) the movement moves away from the other, and the gap between the second clamping member 21 and the first clamping member 22 increases ( Figure 6 In the middle state), the pusher 2003 can push the starting end of the material belt L into the space between the second clamping surface 214 of the second clamping member 21 and the first clamping member 22.

[0066] Figure 7 yes Figure 4 A schematic diagram of the structure of the battery cell winding equipment 200 after the pusher 2003 leaves the space between the second clamping member 21 and the first clamping member 22. After the pusher 2003 pushes the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22, when the pusher 2003 moves in the reverse direction of the second direction ( Figure 7 When the material strip L moves away from the second clamping member 21 and the first clamping member 22 in the positive direction of the X-axis, the pre-tightening member 23 can provide a spring force to at least one of the second clamping member 21 and the first clamping member 22 in the first direction toward the other, so that the starting end of the material strip L is clamped between the second clamping surface 214 and the first clamping member 22. Figure 7(In the middle state). When the starting end of the material strip L is clamped between the second clamping surface 214 and the first clamping member 22, it is equivalent to fixing the starting end of the material strip L to the winding needle 100. In this way, when the winding needle 100 starts to rotate, the material strip L can be wound around the winding needle body 1, thereby achieving the purpose of winding to make a core.

[0067] Since the clamping component 2 is located on the needle winding body 1 and within the accommodating space 10, the possibility of the clamping component 2 protruding from the peripheral wall of the needle winding body 1 can be minimized. This ensures that the material strip L will not be interfered with by the clamping component 2 when it is wound around the needle winding body 1, thus allowing the material strip L to be wound more evenly around the needle winding body 1, resulting in better quality of the core.

[0068] Furthermore, as the pusher 2003 moves away from the second clamping member 21 and the first clamping member 22, the pre-tensioning member 23 can provide a spring force to at least one of the second clamping member 21 and the first clamping member 22, moving towards the other in a first direction, so that the starting end of the material strip L is clamped between the second clamping surface 214 and the first clamping member 22. That is, while the pusher 2003 moves away from the second clamping member 21 and the first clamping member 22, the starting end of the material strip L can be clamped between the second clamping surface 214 and the first clamping member 22 under the action of the pre-tensioning member 23. Compared to the related technologies where the starting end of the material strip L is clamped between the second clamping member 21 and the first clamping member 22 before the pushing member 2003 can leave between them, this method avoids the negative impacts of the pushing member 2003 causing interference or local abnormal lifting of the starting end of the material strip L during the clamping process between the second clamping member 21 and the first clamping member 22. This can prevent wrinkles from appearing at the starting end of the material strip L, thereby improving the quality of the core.

[0069] Furthermore, when the pusher 2003 pushes the starting end of the material belt L into the space between the second clamping member 21 and the first clamping member 22, the pusher 2003 can overcome the elasticity of the pre-tightening member 23, thereby increasing the gap between the second clamping member 21 and the first clamping member 22. This results in a sufficiently large space between the second clamping surface 214 and the first clamping member 22 for the pusher 2003 to enter. Therefore, the second clamping member 21 and the first clamping member 22 can each be a complete plate structure, and there is no need to design multiple clearance notches for the pusher 2003 to enter on the second clamping member 21 and the first clamping member 22. 003 can also be a complete plate structure, without the need to design a rake-like structure to match multiple clearance notches. In this way, when the starting end of the strip L is clamped between the second clamping surface 214 and the first clamping member 22, the clamping force from the second clamping member 21 and the first clamping member 22 at each position of the starting end of the strip L will be approximately equal. This avoids the situation in related technologies where the force is small at the position corresponding to the notch and large at other positions, thus preventing wrinkles from appearing at the starting end of the strip L and making the starting end of the strip L relatively flat, which in turn improves the quality of the core.

[0070] It should be noted that when the material strip L is wound to form a core, the starting end of the material strip L is the starting end of the core.

[0071] It should also be noted that the aforementioned strip L can be an electrode or a diaphragm, etc., and this embodiment does not limit it.

[0072] It is worth noting that at least one of the second clamping member 21 and the first clamping member 22 is movably disposed along a first direction toward or away from the other, and the pre-tightening member 23 is connected to at least one of the second clamping member 21 and the first clamping member 22 in several possible ways: In a first possible implementation, see Figure 1 and Figure 3 The second clamping member 21 is fixed to the needle coil body 1, and the first clamping member 22 is movably disposed along the first direction toward or away from the second clamping member 21. The pre-tightening member 23 is an elastic member, which is connected between the second clamping member 21 and the first clamping member 22.

[0073] Since the elastic element is connected between the second clamping member 21 and the first clamping member 22, and the first clamping member 22 is movably disposed in the first direction toward or away from the second clamping member 21, when the pusher 2003 pushes the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22, the first clamping member 22 can move away from the second clamping member 21 in the first direction, making the gap between the second clamping member 21 and the first clamping member 22 larger and the elastic element stretched. When the pusher 2003 leaves the space between the second clamping member 21 and the first clamping member 22, the elastic element returns to its original state and pulls the first clamping member 22 to move in the first direction toward the second clamping member 21, so that the starting end of the material strip L is clamped between the second clamping member 21 and the first clamping member 22.

[0074] Since the second clamping member 21 is fixed to the needle coil body 1, the first clamping member 22 is movably disposed along the first direction toward or away from the second clamping member 21. That is, the second clamping member 21 is fixedly disposed, and the first clamping member 22 is movably disposed. Compared with the method of making both the second clamping member 21 and the first clamping member 22 movable, the structure of the clamping assembly 2 can be simplified to a certain extent, and the cost of the clamping assembly 2 can be reduced.

[0075] The aforementioned elastic element can be a tension spring or other possible elastic element, and this embodiment does not limit this. The number of elastic elements can be one, two, or three, and this embodiment does not limit this either.

[0076] In a second possible implementation, the second clamping member 21 is movably disposed toward or away from the first clamping member 22, while the first clamping member 22 is movably disposed toward or away from the second clamping member 21 along a first direction, and an elastic member is connected between the second clamping member 21 and the first clamping member 22.

[0077] In this implementation, since the second clamping member 21 is movably disposed toward or away from the first clamping member 22, while the first clamping member 22 is movably disposed toward or away from the second clamping member 21 along the first direction, that is, both the second clamping member 21 and the first clamping member 22 are movable, thus making the movement of the second clamping member 21 and the first clamping member 22 more flexible.

[0078] It should be noted that in this implementation, the elastic element can also be a tension spring or other possible elastic element, and this embodiment does not limit it.

[0079] In the third possible implementation, see Figure 8 , Figure 8 This is a schematic diagram of another structure of a coiling needle 100 provided in an embodiment of this application. The second clamping member 21 is fixed to the coiling needle body 1, and the first clamping member 22 is along the first direction ( Figure 8 The elastic element is movably disposed in the Z-axis direction, either towards or away from the second clamping member 21, and is located along the first direction on the side of the first clamping member 22 opposite to the second clamping member 21. Figure 8 (The lower side of the first clamping member 22) and abuts between the first clamping member 22 and the coil needle body 1.

[0080] In this embodiment, when the pusher 2003 pushes the material strip L into the space between the second clamping member 21 and the first clamping member 22, the first clamping member 22 can move away from the second clamping member 21 along the first direction, thereby increasing the gap between the second clamping member 21 and the first clamping member 22 and compressing the elastic member. When the pusher 2003 leaves the space between the second clamping member 21 and the first clamping member 22, the elastic member returns to its original state and pulls the first clamping member 22 to move closer to the second clamping member 21 along the first direction, so that the starting end of the material strip L is clamped between the second clamping member 21 and the first clamping member 22.

[0081] In this implementation, the elastic element can be a compression spring or other possible elastic element, and this embodiment does not limit this.

[0082] In the fourth possible implementation, see Figure 8 The second clamping member 21 is along the first direction ( Figure 8 The first clamping member 22 is movably disposed towards or away from the second clamping member 21 along the first direction (Z-axis direction). The elastic member may include two members, one of which is located along the first direction on the side of the first clamping member 22 opposite to the second clamping member 21. Figure 8 The second elastic member is located on the lower side of the first clamping member 22 and abuts against the first clamping member 22 and the coil needle body 1. Another elastic member is located on the side of the second clamping member 21 opposite to the first clamping member 22 along the first direction. Figure 8 (The upper side of the second clamping member 21) and abuts between the second clamping member 21 and the coil needle body 1.

[0083] In this implementation, the elastic element can be a compression spring or other possible elastic element, and this embodiment does not limit this.

[0084] It should be noted that, in addition to the aforementioned elastic element, the pre-tightening element 23 can also be a cylinder or the like, as long as it can provide a pre-tightening force to the first clamping element 22 moving in the first direction toward the second clamping surface 214. This embodiment does not limit this.

[0085] The aforementioned first clamping member 22 being movably configured means that the first clamping member 22 is slidably configured. Of course, other possible configurations are also possible, as long as the first clamping member 22 is movable. This embodiment does not limit this.

[0086] The second clamping member 21 can be movably configured in a similar manner to the first clamping member 22, and will not be described again in this embodiment.

[0087] In some embodiments, see Figure 1 and Figure 3 The clamping assembly 2 also includes a guide rod 24, which is connected to the needle coil body 1 and extends along a first direction. The first clamping member 22 and / or the second clamping member 21 are movably sleeved on the guide rod 24 along the extension direction of the guide rod 24.

[0088] Since the guide rod 24 is connected to the needle coil body 1 and extends along the first direction, the first clamping member 22 and / or the second clamping member 21 are movably sleeved on the guide rod 24 along the extension direction of the guide rod 24. Therefore, the guide rod 24 can guide the movement of the first clamping member 22 and / or the second clamping member 21, making the movement of the first clamping member 22 and / or the second clamping member 21 smoother and more stable along the first direction.

[0089] The guide rod 24 can be a round rod or a square rod, etc., and this embodiment does not limit the number of guide rods 24. The number of guide rods 24 can be one, or at least two, such as two, three or four, etc., and this embodiment does not limit the number of guide rods 24.

[0090] When there are at least two guide rods 24, the first clamping member 22 and / or the second clamping member 21 can move more smoothly and steadily in the first direction.

[0091] In some embodiments, see Figure 3 , Figure 9 and Figure 10 , Figure 9 yes Figure 3 A schematic diagram of the structure of the second clamping member 21. Figure 10 yes Figure 3 The diagram shows the structure of the first clamping member 22. The clamping assembly 2 also includes a first support member 25 and a second support member 26. The first support member 25 is located on the side of the second clamping member 21 away from the first clamping member 22. The second clamping member 21 is provided with a first through hole 211 that penetrates the second clamping member 21 along a first direction. The second support member 26 is located on the side of the first clamping member 22 away from the second clamping member 21. The first clamping member 22 is provided with a second through hole 221 that penetrates the first clamping member 22 along a first direction. The pre-tightening member 23 passes through the first through hole 211 and the second through hole 221. One end of the pre-tightening member 23 is connected to the first support member 25 and the other end is connected to the second support member 26.

[0092] Since the first support member 25 is located on the side of the second clamping member 21 opposite to the first clamping member 22, and the second support member 26 is located on the side of the first clamping member 22 opposite to the second clamping member 21, and one end of the pretensioner 23 is connected to the first support member 25 and the other end is connected to the second support member 26, when the pretensioner 23 needs to be removed, it is only necessary to remove the first support member 25 from the second clamping member 21, or simply remove the second support member 26 from the first clamping member 22, making the installation and maintenance of the pretensioner 23 very convenient and flexible.

[0093] In some embodiments, see Figure 3 , Figure 9 and Figure 10 The second clamping member 21 has a first receiving groove 212 on the side facing away from the first clamping member 22. The first receiving groove 212 communicates with the first through hole 211, and the first support member 25 is received in the first receiving groove 212; and / or, the first clamping member 22 has a second receiving groove 222 on the side facing away from the second clamping member 21. The second receiving groove 222 communicates with the second through hole 221, and the second support member 26 is received in the second receiving groove 222.

[0094] By placing the first support member 25 within the first receiving groove 212, the groove wall of the first receiving groove 212 can limit the first support member 25, thereby avoiding or reducing the possibility of the first support member 25 swaying around on the second clamping member 21.

[0095] Similarly, by placing the second support member 26 within the second receiving groove 222, the groove wall of the second receiving groove 222 can limit the second support member 26, thereby avoiding or reducing the possibility of the second support member 26 swaying around on the first clamping member 22.

[0096] To prevent the starting end of the strip L from slipping out between the second clamp 21 and the first clamp 22, in some embodiments, see [reference needed]. Figure 2 Along the winding direction of the needle body 1, the second clamping surface 214 is located upstream of the first clamping member 22, and the first clamping member 22 has a concave-convex structure 223 on the side facing the second clamping surface 214.

[0097] By providing a concave-convex structure 223 on the side of the first clamping member 22 facing the second clamping surface 214, the situation where the second clamping member 21 and the first clamping member 22 are not clamped securely can be avoided, thereby ensuring that the starting end of the material strip L can be stably clamped between the second clamping member 21 and the first clamping member 22.

[0098] Since the concave-convex structure can be formed directly by stamping or milling on the first clamping member 22, the cost of the second clamping member 21 can be reduced to a certain extent.

[0099] In some embodiments, see Figure 1 and Figure 2 The first clamping member 22 includes a first clamping surface 224 and an outer end 225. The first clamping surface 224 is the side of the first clamping member 22 facing the second clamping surface 214, and the outer end 225 is the end of the first clamping member 22 away from the axis of the needle coil body 1. A guide portion 220 is provided at the junction of the end face of the outer end 225 and the first clamping surface 224.

[0100] The guide portion 220 is used to guide the pusher 2003 to push the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22. Specifically, the guide portion 220 can guide the pusher 2003 to push the starting end of the material strip L into the space between the first clamping surface 224 and the second clamping surface 214. The pusher 2003 is used to push the first clamping member 22 to move away from the second clamping surface 214 in a first direction through the guide portion 220.

[0101] By providing the guide portion 220, the pusher 2003 can more easily and smoothly push the starting end of the material strip L into the space between the first clamping surface 224 and the second clamping surface 214, thereby avoiding the situation where the pusher 2003 cannot enter the space between the first clamping surface 224 and the second clamping surface 214.

[0102] The guide section 220 can be implemented in various ways. In one possible implementation, see [link to relevant documentation]. Figure 2 The aforementioned guide section 220 has rounded corners.

[0103] When the guide portion 220 is rounded, a gap can be formed between the guide portion 220 and the second clamping member 21. This gap allows the pusher 2003 to enter, thereby preparing for the subsequent pusher 2003 to push the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22.

[0104] Because the rounded corner surface is relatively smooth, when the pusher 2003 contacts the rounded corner, the friction between the pusher 2003 and the rounded corner can be reduced, which makes it smoother and less resistant when the pusher 2003 pushes the starting end of the material belt L into the space between the second clamping member 21 and the first clamping member 22.

[0105] Of course, the guide portion 220 described above can also be other possible structures, such as the guide portion 220 can also be chamfered, etc., and this embodiment does not limit it in this way.

[0106] In some embodiments, see Figure 1 and Figure 4The clamping components 2 include at least two, and the at least two clamping components 2 are arranged circumferentially along the needle coil body 1.

[0107] When at least two clamping components 2 are arranged circumferentially along the needle winding body 1, the pusher 2003 can push the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22 corresponding to any one of the clamping components 2. On the one hand, if one of the clamping components 2 fails, the other clamping component 2 can continue to work. The at least two clamping components 2 can play a multiple safety role, making the operation of the needle winding 100 safer and more reliable. On the other hand, the needle winding 100 can rotate a small angle so that one of the clamping components 2 can rotate to the feeding station W, so that the pusher 2003 can push the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22 corresponding to that clamping component 2 at the feeding station W, thereby improving the winding efficiency of the needle winding 100 to a certain extent.

[0108] Specifically, the number of clamping components 2 can be two, three, or four, etc., and this embodiment does not limit this.

[0109] In some embodiments, see Figure 1 The needle body 1 includes a first half needle 11 and a second half needle 12, wherein the second half needle 12 and the first half needle 11 are arranged opposite each other at a distance along a first direction, and a receiving space 10 is formed between the first half needle 11 and the second half needle 12.

[0110] Since a receiving space 10 is formed between the first half needle 11 and the second half needle 12, the gap between the first half needle 11 and the second half needle 12 can be cleverly used as the receiving space 10, so that there is no need to specially open the receiving space 10 on the first half needle 11 or the second half needle 12, thereby simplifying the structure of the needle coil body 1 and reducing the cost of the needle coil body 1.

[0111] Of course, in other embodiments, see Figure 11 , Figure 11 This is a schematic diagram of another type of coiled needle 100 provided in an embodiment of this application. The accommodating space 10 can also be opened on the first half needle 11 or the second half needle 12. This embodiment does not limit this.

[0112] An embodiment of this application also provides a battery cell winding device 200, see [link to previous document]. Figure 4 The battery cell winding equipment 200 includes a winding needle 100.

[0113] The structure of the coil needle 100 can be the same as that of any of the coil needles 100 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the coil needle 100 in the above embodiments. This embodiment will not repeat the description here.

[0114] In this embodiment, because the winding needle 100 can prevent wrinkles from appearing at the starting end of the material strip L when winding the core, the starting end of the material strip L is relatively flat, which in turn improves the quality of the core. Based on this, when the battery cell winding equipment 200 includes the winding needle 100, the quality of the battery cells produced by the battery cell winding equipment 200 can be improved.

[0115] In some embodiments, see Figure 4 The battery cell winding equipment 200 also includes a feeding assembly 2001, which includes a cutter 2002, a pusher 2003, and a drive 2004. The pusher 2003 is connected to the drive 2004. Along the winding direction F1 of the needle body 1, the cutter 2002 is located downstream of the pusher 2003. The drive 2004 drives the pusher 2003 to move closer to the needle body 1. The cutter 2002 cuts the strip L to form a starting end. The pusher 2003 pushes the starting end of the strip L into the clamping assembly 2 through the opening 101 of the receiving space. Specifically, it can enter between the second clamping surface 214 of the second clamping member 21 and the first clamping member 22.

[0116] In this embodiment, when it is necessary to push the starting end of the material strip L between the second clamping member 21 and the first clamping member 22, firstly, the winding needle 100 can rotate along the winding direction F1, driving the clamping assembly 2 to rotate to the feeding position W. Then, since the pushing member 2003 is connected to the driving member 2004, the driving member 2004 can drive the pushing member 2003 along the second direction toward the body of the winding needle 1 ( Figure 4 The cutting blade 2002 moves in the negative direction of the X-axis. Since the cutting blade 2002 is located downstream of the pusher 2003 along the winding direction F1 of the needle coil body 1, the cutting blade 2002 can cut the material strip L to form the starting end. The pusher 2003 can push the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22 through the opening 101 of the accommodating space.

[0117] In some embodiments, both the cutter 2002 and the pusher 2003 are connected to the drive unit 2004. When both the cutter 2002 and the pusher 2003 are connected to the drive unit 2004, the cutter 2002 and the pusher 2003 can share the same drive unit 2004, eliminating the need to provide separate drive units for each cutter 2002 and the pusher 2003, thereby saving the number of drive units 2004 and reducing the cost of the drive unit 2004.

[0118] The driving component 2004 can be a cylinder, an electric cylinder, or a motor, etc., and this embodiment does not limit it. The pushing component 2003 can be a plate-like structure or any other possible structure, and this embodiment does not limit it.

[0119] In some embodiments, see Figure 4 The driving component 2004 is also used to drive the pushing component 2003 in the second direction away from the needle coil body 1. Figure 4 The clamping assembly 2 moves away from the clamping component 2 in the positive X-axis direction. The pre-tightening member 23 is used to provide a pre-tightening force to the first clamping member 22 in the first direction so that the clamping assembly 2 is in the clamping state.

[0120] In some embodiments, see Figure 4 The receiving space 10 is also used to allow the cutter 2002 to enter the receiving space 10 through the opening 101 of the receiving space to cut the material strip L.

[0121] Since the receiving space 10 is also used for the cutter 2002 to enter the receiving space 10 through the opening 101 of the receiving space to cut the material strip L, the receiving space 10 can also avoid the cutter 2002, thereby preventing the cutter 2002 from colliding with the needle coil body 1. In this way, there is no need to specially open the cutter groove 2002a on the needle coil body 1 to avoid the cutter 2002, thereby simplifying the structure of the needle coil body 1 and reducing the cost of the needle coil body 1.

[0122] In other embodiments, see Figure 4 The needle body 1 may also have a special cutting groove 2002a for avoiding the cutting blade 2002, but this embodiment does not limit this.

[0123] In some embodiments, see Figure 4 The first clamping member 22 is located downstream of the second clamping member 21.

[0124] With the second clamping member 21 fixed to the needle coil body 1 and the first clamping member 22 movably disposed towards or away from the second clamping member 21 along the first direction, by positioning the first clamping member 22 downstream of the second clamping member 21, the starting end of the material strip L can be pushed between the second clamping member 21 and the first clamping member 22 by the pusher 2003. During this process, the starting end of the material strip L will abut against the second clamping member 21 located upstream. Since the second clamping member 21 located upstream is fixed, the starting end of the material strip L can be kept as still as possible along the first direction, thereby avoiding instability caused by the starting end of the material strip L swaying back and forth along the first direction, and also avoiding friction damage caused by the starting end of the material strip L swaying back and forth along the first direction.

[0125] Of course, in other embodiments, the first clamping member 22 may also be located upstream of the second clamping member 21, and this embodiment does not limit this.

[0126] In some embodiments, see Figure 4 and Figure 12 , Figure 12 yes Figure 4 A schematic diagram of the structure of the pusher 2003 is shown. The pusher 2003 includes a first abutting surface 2003a and a second abutting surface 2003b, wherein the first abutting surface 2003a faces the cutter 2002, and the second abutting surface 2003b is disposed opposite to the first abutting surface 2003a. The pusher 2003 is driven by the drive member 2004 to move in a second direction toward the needle coiling body 1. Figure 12 (in the negative direction of the X-axis), the first contact surface 2003a and the second contact surface 2003b gradually approach each other, that is, the distance between the first contact surface 2003a and the second contact surface 2003b gradually decreases.

[0127] As the driving member 2004 drives the pushing member 2003 to move in the second direction toward the needle coil body 1, the first abutting surface 2003a and the second abutting surface 2003b gradually approach each other. Therefore, when both the first clamping member 22 and the second clamping member 21 are movably arranged in the first direction, when the pushing member 2003 pushes the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22, the first abutting surface 2003a abuts against the first clamping member 22, and the second abutting surface 2003b abuts against the second clamping member 21. When part 21 is in motion, as the pusher 2003 pushes the starting end of the material belt L continuously into the space, the second contact surface 2003b can push the second clamping member 21 to move away from the first clamping member 22 along the first direction, and the first contact surface 2003a can push the first clamping member 22 to move away from the second clamping member 21 along the first direction, thereby increasing the gap between the first clamping member 22 and the second clamping member 21. This achieves the purpose of pushing the starting end of the material belt L into the space between the second clamping member 21 and the first clamping member 22 by the pusher 2003.

[0128] As can be seen, the driving member 2004 drives the pushing member 2003 to move in the second direction toward the direction of the needle coil body 1. By making the first contact surface 2003a and the second contact surface 2003b gradually approach each other, the pushing member 2003 can use its own structural features to push the second clamping member 21 to move away from the first clamping member 22 in the first direction, and the first clamping member 22 to move away from the second clamping member 21 in the first direction. In this way, the purpose of pushing the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22 can be achieved by the pushing member 2003.

[0129] In addition to pushing the starting end of the material belt L into the space between the second clamping member 21 and the first clamping member 22, the aforementioned pusher 2003 can also push the second clamping member 21 to move away from the first clamping member 22 along the first direction, and the first clamping member 22 to move away from the second clamping member 21 along the first direction. The pusher 2003 has multiple uses and a very ingenious structural design, which can reduce the cost of the pusher 2003.

[0130] In other embodiments, when the first clamping member 22 is movably disposed along a first direction and the second clamping member 21 is fixedly disposed, when the pusher 2003 pushes the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22, as the pusher 2003 continues to push the starting end of the material strip L into the space, the second clamping member 21 can remain stationary, and the first abutment surface 2003a can push the first clamping member 22 to move away from the second clamping member 21 along the first direction, thereby increasing the gap between the first clamping member 22 and the second clamping member 21, thereby achieving the purpose of pushing the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22 by the pusher 2003.

[0131] In some embodiments, see Figure 4 and Figure 12 The second abutment surface 2003b is parallel to the driving direction of the driving member 2004, and the included angle between the first abutment surface 2003a and the second abutment surface 2003b is an acute angle.

[0132] By making the second abutment surface 2003b parallel to the driving direction of the driving member 2004, and the included angle between the first abutment surface 2003a and the second abutment surface 2003b is an acute angle, when the pushing member 2003 pushes the starting end of the material strip L into the space between the second clamping member 21 and the first clamping member 22, only the first abutment surface 2003a can push the first clamping member 22 to move away from the second clamping member 21 along the first direction, while the second abutment surface 2003b will not push the second clamping member 21 to move away from the first clamping member 22 along the first direction, so that the second clamping member 21 can remain stationary along the first direction, thereby reducing the occurrence of friction damage caused by the starting end of the material strip L swaying back and forth along the first direction.

[0133] When the pusher 2003 moves away from between the second clamp 21 and the first clamp 22, to prevent the starting end of the strip L from sliding out from between the second clamp 21 and the first clamp 22 along with the pusher 2003, in some embodiments, see Figure 4 , Figure 12 and Figure 13 , Figure 13 yes Figure 12A schematic diagram of the structure of the pusher 2003 from another perspective, showing that the second contact surface 2003b is provided with an air blowing hole 2003c.

[0134] By providing an air blowing hole 2003c on the second abutment surface 2003b, air can be blown outward through the air blowing hole 2003c during the process of the pusher 2003 leaving between the second clamping member 21 and the first clamping member 22. In this way, the starting end of the material strip L can be prevented from adhering to the second abutment surface 2003b, and the starting end of the material strip L can be prevented from sliding out between the second clamping member 21 and the first clamping member 22 along with the pusher 2003.

[0135] In some embodiments, see Figure 4 and Figure 7 During the process of the pusher 2003 entering between the first clamping member 22 and the second clamping surface 214 and leaving between the first clamping member 22 and the second clamping surface 214, the pusher 2003 remains in contact with the second clamping surface 214.

[0136] During the process of the pusher 2003 entering between the first clamping member 22 and the second clamping surface 214, and leaving between the first clamping member 22 and the second clamping surface 214, by keeping the pusher 2003 in contact with the second clamping surface 214, the material strip L can be kept clamped between the pusher 2003 and the second clamping surface 214. In this way, the material strip L can be prevented from sliding out between the first clamping member 22 and the second clamping surface 214.

[0137] In some embodiments, see Figure 4 , Figure 7 and Figure 12 The feeding assembly 2001 also includes a cutter 2002, which is located downstream of the pusher 2003 along the winding direction F1 of the needle coil body 1.

[0138] The pusher 2003 includes a first abutting surface 2003a and a second abutting surface 2003b. The first abutting surface 2003a faces the cutter 2002, and the second abutting surface 2003b is disposed opposite to the first abutting surface 2003a. During the process of the pusher 2003 entering between the first clamping member 22 and the second clamping surface 214 and leaving between the first clamping member 22 and the second clamping surface 214, the second abutting surface 2003b remains in contact with the second clamping surface 214.

[0139] Since the first contact surface 2003a faces the cutter 2002 and the second contact surface 2003b is disposed opposite to the first contact surface 2003a, when the cutter 2002 cuts the strip L to form the starting end, the starting end of the strip L will be located on the side where the second contact surface 2003b of the pusher 2003 is located.

[0140] When the starting end of the material strip L is located on the side where the second abutting surface 2003b of the pusher 2003 is located, when the second abutting surface 2003b remains abutting against the second clamping surface 214, the starting end of the material strip L will remain clamped between the pusher 2003 and the second clamping surface 214. In this way, the starting end of the material strip L can be prevented from sliding out between the first clamping member 22 and the second clamping surface 214.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A coiled needle (100), characterized in that, include: A needle coil body (1), on which a receiving space (10) is formed; and, A clamping assembly (2) is disposed on the needle coil body (1) and located within the receiving space (10). The clamping assembly (2) includes a first clamping member (22), which is movably disposed along a first direction toward or away from a second clamping surface (214). The second clamping surface (214) is formed on the clamping assembly (2) along the winding direction (F1) of the needle body (1). The second clamping surface (214) is located upstream of the first clamping member (22), and an anti-slip member (213) is provided on the second clamping surface (214).

2. The coiling needle (100) according to claim 1, characterized in that, The anti-slip component (213) is a rubber-coated component.

3. The coiling needle (100) according to claim 1, characterized in that, The clamping assembly (2) further includes a pre-tightening member (23), which is connected to the first clamping member (22).

4. The coiling needle (100) according to claim 3, characterized in that, The pre-tightening member (23) is used to provide a pre-tightening force to the first clamping member (22) in a first direction toward the second clamping surface (214) so ​​that the first clamping member (22) abuts against the second clamping surface (214) and the clamping assembly (2) is in a clamping state.

5. The coiling needle (100) according to claim 3, characterized in that, The clamping assembly (2) further includes: The second clamping member (21) is opposite to the first clamping member (22) along the first direction, and at least one of the second clamping member (21) and the first clamping member (22) is movably disposed along the first direction toward or away from the other, and the second clamping surface (214) is formed on the second clamping member (21). The preload (23) is connected to at least one of the second clamping member (21) and the first clamping member (22), and the preload (23) is used to provide a preload force to at least one of the second clamping member (21) and the first clamping member (22) moving toward the other in the first direction, so that the first clamping member (22) abuts against the second clamping surface (214).

6. The coiling needle (100) according to claim 5, characterized in that, The clamping assembly (2) further includes: A guide rod (24) is connected to the needle coil body (1) and extends along the first direction. The first clamping member (22) and / or the second clamping member (21) are movably sleeved on the guide rod (24) along the extension direction of the guide rod (24).

7. The coiling needle (100) according to claim 5, characterized in that, The second clamping member (21) is fixed to the needle coil body (1), and the first clamping member (22) is movably disposed along the first direction toward or away from the second clamping member (21). The pre-tightening member (23) is an elastic member, which is connected between the second clamping member (21) and the first clamping member (22).

8. The coiling needle (100) according to claim 7, characterized in that, The clamping assembly (2) further includes: A first support member (25) is located on the side of the second clamping member (21) opposite to the first clamping member (22), and the second clamping member (21) is provided with a first through hole (211) extending through the second clamping member (21) along the first direction; and, The second support member (26) is located on the side of the first clamping member (22) away from the second clamping member (21), and the first clamping member (22) is provided with a second through hole (221) that passes through the first clamping member (22) along the first direction. The elastic element is inserted through the first through hole (211) and the second through hole (221), with one end of the elastic element connected to the first support (25) and the other end connected to the second support (26).

9. The coiling needle (100) according to claim 8, characterized in that: The second clamping member (21) has a first receiving groove (212) on the side facing away from the first clamping member (22), the first receiving groove (212) is connected to the first through hole (211), and the first support member (25) is housed in the first receiving groove (212); and / or, the first clamping member (22) has a second receiving groove (222) on the side facing away from the second clamping member (21), the second receiving groove (222) is connected to the second through hole (221), and the second support member (26) is housed in the second receiving groove (222).

10. The coiling needle (100) according to claim 1, characterized in that, The first clamping member (22) has a concave-convex structure (223) on the side facing the second clamping surface (214).

11. The coiling needle (100) according to any one of claims 1-10, characterized in that, The clamping assembly (2) includes at least two, and the at least two clamping assemblies (2) are arranged circumferentially along the needle coil body (1).

12. The coiling needle (100) according to any one of claims 1-10, characterized in that, The coiling needle body (1) includes: First half stitch (11); The second half needle (12) and the first half needle (11) are arranged opposite each other at intervals along the first direction, and the receiving space (10) is formed between the first half needle (11) and the second half needle (12).

13. A battery cell winding device (200), characterized in that, Includes the coiling needle (100) according to any one of claims 1-12.

14. The cell winding apparatus (200) according to claim 13, characterized in that, Also includes: The feeding assembly (2001) includes a cutter (2002), a pusher (2003) and a drive (2004), wherein the pusher (2003) is connected to the drive (2004). Along the winding direction (F1) of the needle body (1), the cutter (2002) is located downstream of the pusher (2003).

15. The cell winding apparatus (200) according to claim 14, characterized in that, The drive member (2004) is used to drive the pusher (2003) to move in the second direction toward the needle coil body (1), the cutter (2002) is used to cut the strip (L) to form a starting end, and the pusher (2003) is used to push the starting end of the strip (L) into the space between the second clamping surface (214) and the first clamping member (22) through the opening (101) of the receiving space.

16. The cell winding apparatus (200) according to claim 14, characterized in that, The drive member (2004) is also used to drive the pusher (2003) to move away from the needle coil body (1) and leave the clamping assembly (2) in a second direction. The pre-tightening member (23) is used to provide a pre-tightening force to the first clamping member (22) in a first direction so that the clamping assembly (2) is in a clamping state.

17. The cell winding apparatus (200) according to any one of claims 14-16, characterized in that, The pusher (2003) includes: The first contact surface (2003a) faces the cutter (2002). The second abutment surface (2003b) is disposed opposite to the first abutment surface (2003a); The pusher (2003) is driven by the drive member (2004) to move in the second direction toward the needle coil body (1), and the distance between the first contact surface (2003a) and the second contact surface (2003b) gradually decreases.

18. The cell winding apparatus (200) according to claim 17, characterized in that, An air blowing hole (2003c) is provided on the second contact surface (2003b).

19. The cell winding apparatus (200) according to claim 17, characterized in that, During the process of the pusher (2003) entering between the first clamping member (22) and the second clamping surface (214) and leaving between the first clamping member (22) and the second clamping surface (214), the pusher (2003) remains in contact with the second clamping surface (214).

20. The cell winding apparatus (200) according to claim 19, characterized in that, During the process of the pusher (2003) entering between the first clamping member (22) and the second clamping surface (214) and leaving between the first clamping member (22) and the second clamping surface (214), the second abutting surface (2003b) remains abutting against the second clamping surface (214).

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