Needle clamping mechanism, battery cell blanking clamping assembly and winding equipment

Abstract

The invention relates to the technical field of battery cell processing equipment, in particular to a clamping needle mechanism, a battery cell discharging clamping assembly and winding equipment. A needle clamping mechanism comprises a needle clamping seat; and the clamping needle is arranged on the clamping needle seat in a rotatable manner. According to the needle clamping mechanism provided by the invention, in the process of pulling a cylindrical battery cell into a flat battery cell, the condition that the inner ring of the battery cell is wrinkled can be avoided, so that the quality of the battery cell can be better.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell processing equipment, and in particular, to a needle clamping mechanism, a battery cell blanking clamping assembly, and a winding equipment. Background Art

[0002] A winding equipment is a device used for processing battery cells. Specifically, a winding equipment generally includes a winding needle and a battery cell blanking clamping assembly. When processing a battery cell, first, the winding needle can be rotated to process a cylindrical battery cell. Then, the battery cell blanking clamping assembly can clamp the cylindrical battery cell and blank the cylindrical battery cell from the winding needle. Finally, the cylindrical battery cell can be pulled into a flat battery cell by the battery cell blanking clamping assembly to prepare for the subsequent processing of the battery cell. However, during the process of pulling the cylindrical battery cell into a flat battery cell by the battery cell blanking clamping assembly, wrinkles are likely to occur in the inner circle of the battery cell, resulting in poor quality of the battery cell. Summary of the Invention

[0003] The present application discloses a needle clamping mechanism, a battery cell blanking clamping assembly, and a winding equipment, which can avoid wrinkles in the inner circle of the battery cell, and thus can make the quality of the battery cell better.

[0004] To achieve the above object, in a first aspect, the present application discloses a needle clamping mechanism, including:

[0005] A needle clamping seat; and

[0006] A needle, which is rotatably arranged on the needle clamping seat.

[0007] Since the needle is rotatably arranged on the needle clamping seat around the rotation axis, when the needle clamping mechanism is applied to the battery cell blanking clamping assembly and during the process of pulling the battery cell flat by the battery cell blanking clamping assembly, when the circumferential wall of the needle abuts against the inner circle of the battery cell, if the structure of the battery cell is asymmetric, the needle can rotate relative to the needle clamping seat around the rotation axis, and the inner circle of the battery cell can slide along the circumferential direction of the battery cell. Generally speaking, although the circumferential wall of the needle abuts against the inner circle of the battery cell, the needle does not completely fix the inner circle of the battery cell, but allows the inner circle of the battery cell to slide along the circumferential direction of the battery cell for adaptive adjustment, so as to avoid wrinkles in the inner circle of the battery cell, and thus can make the quality of the battery cell better.

[0008] Optionally, the needle has opposite first and second ends, the first end is rotatably arranged on the needle clamping seat, and / or the second end is rotatably arranged on the needle clamping seat.

[0009] Since the first end is rotatably arranged on the needle clamping seat, and / or the second end is rotatably arranged on the needle clamping seat, that is, the end of the needle is rotatably arranged on the needle clamping seat. In this way, the needle can be rotatably installed on the needle clamping seat by using the end of the needle, and a large amount of the peripheral wall of the needle can be vacated to abut against the inner ring of the battery cell, so that the utilization rate of the peripheral wall of the needle can be higher.

[0010] In addition, when the first end is rotatably arranged on the needle clamping seat and the second end is also rotatably arranged on the needle clamping seat at the same time, both ends of the needle can be rotatably installed on the needle clamping seat. On the one hand, the needle can be installed on the needle clamping seat more stably and firmly. On the other hand, when the needle rotates relative to the needle clamping seat around the rotation axis, it can be more stable.

[0011] Optionally, the needle has opposite first and second ends. An installation groove is provided on the needle clamping seat. The installation groove includes opposite first and second groove walls. The needle is accommodated in the installation groove. The first end is rotatably arranged on the first groove wall, and the second end is rotatably arranged on the second groove wall.

[0012] Since the needle is accommodated in the installation groove, the needle can be semi-wrapped by the installation groove. In this way, on the one hand, when the needle rotates, it is less affected by the external environment, making the environment where the needle is located safer. On the other hand, the needle can be installed more firmly.

[0013] Optionally, a first bearing is provided on the first groove wall, and a second bearing is provided on the second groove wall. The first end is installed in the first bearing, and the second end is installed in the second bearing.

[0014] By installing the first end in the first bearing and the second end in the second bearing, under the supporting action of the first bearing and the second bearing, the needle can rotate more smoothly around the rotation axis.

[0015] In addition, since the bearing structure is simple and the technology is mature, when the first end is rotatably arranged on the needle clamping seat around the rotation axis by installing the first end in the first bearing and the second end in the second bearing, the cost of the needle clamping mechanism can be reduced while ensuring the reliable rotation of the needle.

[0016] Optionally, the needle clamping mechanism further includes a stopping component, and the stopping component includes:

[0017] A first driving member, the first driving member is arranged on the needle clamping seat; and,

[0018] A first abutment member, wherein the first abutment member is connected to the first driving member, and the first driving member is used to drive the first abutment member to move toward or away from the clamping needle so as to abut against or disengage from the clamping needle.

[0019] Since the first abutment member is connected to the first driving member, when it is necessary to prevent the clamping needle from rotating, the first driving member can drive the first abutment member to move toward the direction close to the clamping needle, so that the first abutment member abuts against the clamping needle. In this way, friction will be generated between the first abutment member and the clamping needle, and the clamping needle cannot rotate under the action of the friction force, thereby achieving the purpose of preventing the clamping needle from rotating.

[0020] When it is necessary to allow the clamping needle to rotate, the first driving member can drive the first abutment member to move in a direction away from the clamping needle, so that the first abutment member disengages from the clamping needle. In this way, the friction between the first abutment member and the clamping needle disappears, thereby achieving the purpose of allowing the clamping needle to rotate.

[0021] When it is necessary to restrict or allow the clamping needle to rotate, this can be achieved by driving the first abutting member to abut against or disengage from the clamping needle through the first driving member. The implementation principle is very simple, and therefore the cost of the stop assembly can be reduced.

[0022] Optionally, the clamping needle has a first end and a second end opposite to each other, and the first driving member is used to drive the first abutment member to move toward or away from an end surface of the first end to abut against or disengage from the end surface of the first end, so as to limit or allow the clamping needle to rotate.

[0023] Since the first abutment member is located on the side of the first end away from the second end along the extension direction of the rotation axis, the first driving member is used to drive the first abutment member to move along the extension direction of the rotation axis toward the end surface close to or away from the first end. Therefore, when the first driving member drives the first abutment member to move along the extension direction of the rotation axis toward the end surface close to the first end, the first abutment member can abut against the end surface of the first end, thereby achieving the purpose of preventing the clamping needle from rotating.

[0024] Since the first abutment member abuts against the end surface of the first end to prevent the clamping needle from rotating, the surrounding wall of the clamping needle can be left empty for abutting against the battery cell, thereby reducing the possibility of the first abutment member interfering with the abutment between the surrounding wall of the clamping needle and the battery cell.

[0025] Optionally, the first abutment member is spaced apart on the peripheral wall of the clamping needle, and the first driving member is used to drive the first abutment member to move along the radial direction of the clamping needle toward or away from the peripheral wall of the clamping needle until it abuts against or disengages from the peripheral wall to limit or allow the clamping needle to rotate.

[0026] Since the first abutting member is sleeved on the periphery of the needle holder at intervals, and the first driving member is used to drive the first abutting member to move radially towards or away from the periphery of the needle holder along the needle holder, therefore, when the first driving member drives the first abutting member to move radially towards the periphery of the needle holder along the needle holder, the first abutting member can abut against the periphery of the needle holder, and thus the purpose of preventing the needle holder from rotating can be achieved.

[0027] When the first abutting member achieves the purpose of preventing the needle holder from rotating by abutting against the periphery of the needle holder, since the periphery is a curved surface, to a certain extent, the friction force between the first abutting member and the needle holder can be increased, so as to better achieve the purpose of preventing the needle holder from rotating.

[0028] Optionally, a friction member is provided on the surface of the first abutting member facing the needle holder.

[0029] By providing a friction member on the surface of the first abutting member facing the needle holder, on the one hand, the friction force between the first abutting member and the needle holder can be enhanced, so as to better prevent the needle holder from rotating. On the other hand, direct contact between the first abutting member and the needle holder can also be avoided, so as to avoid or reduce the possibility of the first abutting member or the needle holder being scratched.

[0030] Optionally, the needle holder includes an arc surface.

[0031] Since the arc surface is relatively smooth, the situation of scratching the battery cell can be avoided.

[0032] Optionally, the cross-section of the needle holder is a cylinder or an ellipsoid, and the peripheral wall of the cylinder or the peripheral wall of the ellipsoid forms the arc surface.

[0033] When the cross-section of the needle holder is a cylinder, the needle holder can be a cylindrical structure. Since the surface of the cylindrical structure is relatively round, on the one hand, the situation of pressing and damaging the inner ring of the battery cell when the peripheral wall of the needle holder abuts against the inner ring of the battery cell can be avoided or reduced. On the other hand, the friction force between the peripheral wall of the needle holder and the inner ring of the battery cell can also be reduced, making the inner ring of the battery cell slide more smoothly along the circumferential direction of the battery cell.

[0034] In a second aspect, the present application discloses a battery cell blanking clamping assembly, including the needle holder mechanism according to any one of the first aspects above.

[0035] Since the needle clamping mechanism is rotatably arranged on the needle clamping seat around the rotation axis, when the cell blanking clamping assembly includes the needle clamping mechanism, during the process of flattening the cell by the cell blanking clamping assembly, the needle can rotate relative to the needle clamping seat around the rotation axis, and the inner ring of the cell can slide along the circumferential direction of the cell. Generally speaking, although the circumferential wall of the needle abuts against the inner ring of the cell, the needle does not completely fix the inner ring of the cell, but allows the inner ring of the cell to slide along the circumferential direction of the cell for adaptive adjustment, so as to avoid the occurrence of wrinkles in the inner ring of the cell, and further improve the quality of the cell.

[0036] Optionally, it further includes:

[0037] A second driving member; and,

[0038] A first clamping mechanism, the needle of the needle clamping mechanism is opposite to the first clamping mechanism, and the second driving member is connected to the first clamping mechanism and / or the needle clamping seat.

[0039] Since the second driving member is connected to the first clamping mechanism and / or the needle clamping seat, the second driving member can drive the first clamping mechanism and the needle to approach or move away from each other in a direction perpendicular to the rotation axis. When the second driving member drives the first clamping mechanism and the needle to approach each other, the needle clamping mechanism and the first clamping mechanism can clamp the cell on the inner and outer rings of the cell, so as to achieve the purpose of clamping the cell. When the second driving member drives the first clamping mechanism and the needle to move away from each other, the purpose of releasing the cell can be achieved.

[0040] Optionally, the needle and the first clamping mechanism are used to clamp the cell, and the length of the needle is greater than or equal to the length of the cell.

[0041] Since the length of the needle along the extension direction of the rotation axis is greater than or equal to the length of the cell, in this way, the cell can be completely covered by the needle along the extension direction of the needle, and the needle is rotatable, so as to avoid the situation that the non-rotatable part of the needle clamping mechanism contacts the cell, and further avoid the occurrence of wrinkles in the inner ring of the cell.

[0042] In a third aspect, the present application discloses a winding device, including the cell blanking clamping assembly according to any one of the second aspects above.

[0043] Since the cell blanking clamping assembly can avoid the occurrence of wrinkles in the inner ring of the cell when flattening the cell. Based on this, when the winding device includes the cell blanking clamping assembly, the quality of the cell produced by the winding device can be better.

[0044] Compared with the prior art, the beneficial effects of the present application are as follows:

[0045] In this application, since the pinching needle can be rotatably arranged on the pinching needle seat around the rotation axis, when the pinching needle mechanism is applied to the cell blanking clamping assembly and during the process of the cell blanking clamping assembly flattening the cell, when the peripheral wall of the pinching needle abuts against the inner ring of the cell, if the structure of the cell is asymmetric, the pinching needle can rotate relative to the pinching needle seat around the rotation axis, and the inner ring of the cell can slide along the circumferential direction of the cell. Generally speaking, although the peripheral wall of the pinching needle abuts against the inner ring of the cell, the pinching needle does not completely fix the inner ring of the cell, but allows the inner ring of the cell to slide along the circumferential direction of the cell for adaptive adjustment, thereby avoiding the occurrence of wrinkles in the inner ring of the cell and further improving the quality of the cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 is a schematic structural diagram of a winding device provided by an embodiment of the present application;

[0048] Figure 2 is Figure 1 a schematic structural diagram after the cell blanking clamping assembly in

[0049] Figure 3A is Figure 2 a schematic structural diagram after the cell blanking clamping assembly in

[0050] Figure 3B a schematic structural diagram when the structure of the cell is asymmetric;

[0051] Figure 4 is a schematic structural diagram of a pinching needle mechanism provided by an embodiment of the present application;

[0052] Figure 5 is Figure 4 a sectional view at the A-A position in

[0053] Figure 6 is Figure 4 a schematic structural diagram of the pinching needle mechanism in

[0054] Figure 7 is a schematic structural diagram of another pinching needle mechanism provided by an embodiment of the present application;

[0055] Figure 8 is Figure 7Structural schematic diagram of the C position of the middle clamping pin mechanism from the perspective of the negative Y-axis direction;

[0056] Figure 9 It is a structural schematic diagram of a cell blanking clamping assembly provided by an embodiment of the present application.

[0057] Main reference numeral description

[0058] 1 - Clamping pin seat; 11 - Installation groove; 111 - First groove wall; 1111 - First bearing; 112 - Second groove wall; 1121 - Second bearing;

[0059] 2 - Clamping pin; 21 - First end; 211 - End face; 22 - Second end; 23 - Peripheral wall;

[0060] 3 - Stopping assembly; 31 - First driving member; 32 - First abutting member; 321 - Friction member;

[0061] 100 - Clamping pin mechanism;

[0062] 200 - Cell blanking clamping assembly; 201 - First mounting seat; 202 - Second driving member; 203 - First clamping mechanism; 204 - Second mounting seat; 205 - Third driving member; 206 - Fourth driving member; 207 - Second clamping mechanism; 208 - Third clamping mechanism;

[0063] 300 - Winding equipment; 301 - Winding needle;

[0064] D - Cell; O - Axis of rotation. Detailed implementation manners

[0065] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0066] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0067] Moreover, in addition to being used to indicate orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0068] In addition, the terms "installed", "set", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0070] Before explaining the technical solution of the application, the background technology of this application will be described first.

[0071] Figure 1 is a schematic structural view of a winding device 300 provided by an embodiment of this application. Figure 2 is Figure 1 a schematic structural view after the cell blanking clamping assembly 200 in Figure 3A unloads the cell D from the winding pin 301. Figure 2 is Figure 3B a schematic structural view after the cell blanking clamping assembly 200 in

[0072] See Figure 1 , the winding device 300 is a device for processing and manufacturing the cell D. Specifically, the winding device 300 generally includes a winding pin 301 and a cell blanking clamping assembly 200. When processing and manufacturing the cell D, first, the winding pin 301 can be rotated to process a cylindrical cell D. Then, see Figure 2 , the cell blanking clamping assembly 200 can clamp the cylindrical cell D and unload the cylindrical cell D from the winding pin 301. Finally, see Figure 2 and Figure 3A, the cylindrical battery cell D can be pulled into a flat battery cell D by the battery cell blanking clamping assembly 200, preparing for the subsequent processing of the battery cell D. However, during the process of pulling the cylindrical battery cell D into a flat battery cell D by the battery cell blanking clamping assembly 200, since the clamping pin mechanism 100 and the first clamping mechanism 203 of the battery cell blanking clamping assembly 200 tightly clamp the battery cell D on the inner and outer circles of the battery cell D, the inner circle of the battery cell D is tightly fixed by the clamping pin mechanism 100, resulting in that during the process of flattening the battery cell D, referring to Figure 3B , if the structure of the battery cell D being flattened is asymmetric ( Figure 3B in the state shown in), the inner circle of the battery cell D will not be able to slide circumferentially along the battery cell D for adaptive adjustment, resulting in the inner circle of the battery cell D being prone to wrinkling, and further resulting in poor quality of the battery cell D. Based on this, the present application provides a new clamping pin mechanism 100 to solve the above problems.

[0073] The technical solution of the present application will be described below in conjunction with specific embodiments and drawings.

[0074] Figure 4 is a schematic structural diagram of a clamping pin mechanism 100 provided by an embodiment of the present application. Referring to Figure 4 , the clamping pin mechanism 100 includes a clamping pin base 1 and clamping pins 2. Among them, the clamping pins 2 have a rotation axis O, and the clamping pins 2 are rotatably arranged on the clamping pin base 1 around the rotation axis O.

[0075] Combined with Figure 3A and Figure 4 , since the clamping pins 2 are rotatably arranged on the clamping pin base 1 around the rotation axis O, therefore, when the clamping pin mechanism 100 is applied to the battery cell blanking clamping assembly 200 and during the process of the battery cell blanking clamping assembly 200 flattening the battery cell D, when the peripheral wall 23 of the clamping pins 2 abuts against the inner circle of the battery cell D, if the structure of the battery cell D is asymmetric, the clamping pins 2 can rotate relative to the clamping pin base 1 around the rotation axis O, and the inner circle of the battery cell D can slide circumferentially along the battery cell D. Generally speaking, although the peripheral wall 23 of the clamping pins 2 abuts against the inner circle of the battery cell D, the clamping pins 2 do not completely fix the inner circle of the battery cell D, but allow the inner circle of the battery cell D to slide circumferentially along the battery cell D for adaptive adjustment, so as to avoid the situation of wrinkling of the inner circle of the battery cell D, and further improve the quality of the battery cell D.

[0076] It should be noted that during the process of flattening the battery cell D by the battery cell blanking clamping assembly 200, the circumferential wall 23 of the clamping pin 2 of the clamping pin mechanism 100 abuting against the inner ring of the battery cell D is only a possible application scenario given in this embodiment. In other possible application scenarios, the circumferential wall 23 of the clamping pin 2 can also be made to abut against the outer ring of the battery cell D. When the circumferential wall of the clamping pin 2 abuts against the outer ring of the battery cell D, it is possible to avoid the occurrence of wrinkles on the outer ring during the process of flattening the battery cell D, and thus the quality of the battery cell D can be made better.

[0077] Among them, considering that the circumferential wall 23 of the clamping pin 2 needs to abut against the inner ring or the outer ring of the battery cell D, in order to avoid the clamping pin 2 scratching the battery cell D, in some embodiments, the clamping pin 2 includes an arc surface, and the arc surface can be made to abut against the battery cell D. Since the arc surface is relatively smooth, it is possible to avoid the occurrence of scratching the battery cell D.

[0078] The above clamping pin 2 is an elliptical cylinder or other possible shapes, as long as the circumferential wall 23 of the clamping pin 2 abuts against the inner ring of the battery cell D, it is possible to allow the inner ring of the battery cell D to slide along the circumferential direction of the battery cell D, and avoid the occurrence of wrinkles on the inner ring of the battery cell D. This embodiment does not make any limitations in this regard. In one possible implementation manner, see Figure 4 , the clamping pin 2 is a cylinder, and the circumferential wall of the cylinder forms the above arc surface.

[0079] When the clamping pin 2 is a cylinder, the clamping pin 2 can be made into a cylindrical structure. Since the surface of the cylindrical structure is relatively round, on the one hand, it is possible to avoid or reduce the occurrence of the circumferential wall 23 of the clamping pin 2 pressing and damaging the inner ring of the battery cell D when abutting against the inner ring of the battery cell D. On the other hand, it is also possible to reduce the frictional force between the circumferential wall 23 of the clamping pin 2 and the inner ring of the battery cell D, making the inner ring of the battery cell D slide more smoothly along the circumferential direction of the battery cell D.

[0080] It should be noted that taking the clamping pin 2 as a cylinder as an example, it can be understood that the above rotation axis O is an axis that coincides with the axis of the cylinder.

[0081] Of course, the clamping pin 2 can also be an elliptical cylinder. When the clamping pin 2 is an elliptical cylinder, the circumferential wall of the elliptical cylinder forms the above arc surface.

[0082] In some embodiments, see Figure 4 and Figure 5 , Figure 5 is Figure 4 the cross-sectional view at the A-A position in , the clamping pin 2 has opposite first end 21 and second end 22 along the extension direction of the rotation axis O, and the first end 21 is rotatably arranged on the clamping pin seat 1, and / or, the second end 22 is rotatably arranged on the clamping pin seat 1.

[0083] Since the first end 21 is rotatably arranged on the needle clamping seat 1, and / or the second end 22 is rotatably arranged on the needle clamping seat 1, that is, either one end or both ends of the needle clamp 2 are rotatably arranged on the needle clamping seat 1. In this way, the needle clamp 2 can be rotatably installed on the needle clamping seat 1 by using the end of the needle clamp 2, and a large amount of the peripheral wall 23 of the needle clamp 2 can be vacated for abutting against the inner ring of the battery cell D, so that the utilization rate of the peripheral wall 23 of the needle clamp 2 can be higher.

[0084] In addition, when the first end 21 is rotatably arranged on the needle clamping seat 1 and at the same time the second end 22 is also rotatably arranged on the needle clamping seat 1, both ends of the needle clamp 2 can be rotatably installed on the needle clamping seat 1. On the one hand, the needle clamp 2 can be installed on the needle clamping seat 1 more stably and firmly. On the other hand, when the needle clamp 2 rotates relative to the needle clamping seat 1 around the rotation axis O, it can be more stable.

[0085] In some embodiments, refer to Figure 4 and Figure 6 , Figure 6 is Figure 4 a schematic structural view of the needle clamping mechanism 100 in another perspective. An installation groove 11 is provided on the needle clamping seat 1. The installation groove 11 includes a first groove wall 111 and a second groove wall 112 opposite to each other along the extension direction of the rotation axis O. The needle clamp 2 is accommodated in the installation groove 11. The first end 21 is rotatably arranged on the first groove wall 111, and the second end 22 is rotatably arranged on the second groove wall 112.

[0086] Since the needle clamp 2 is accommodated in the installation groove 11, therefore, the needle clamp 2 can be semi-wrapped by the installation groove 11. With such a setting, on the one hand, when the needle clamp 2 rotates, it is less affected by the external environment, making the environment where the needle clamp 2 is located safer. On the other hand, the needle clamp 2 can also be installed more firmly.

[0087] Among them, there are various ways for the above-mentioned first end 21 to be rotatably arranged on the first groove wall 111 and for the second end 22 to be rotatably arranged on the second groove wall 112. In one possible implementation manner, refer to Figure 5 , a first bearing 1111 is provided on the first groove wall 111, a second bearing 1121 is provided on the second groove wall 112, the first end 21 is installed in the first bearing 1111, and the second end 22 is installed in the second bearing 1121.

[0088] By installing the first end 21 in the first bearing 1111 and the second end 22 in the second bearing 1121, under the supporting action of the first bearing 1111 and the second bearing 1121, the needle clamp 2 can rotate more smoothly around the rotation axis O.

[0089] In addition, since the bearing structure is simple and the technology is mature, when the first end 21 is rotatably arranged on the needle holder 1 around the rotation axis O by being mounted on the first bearing 1111 and the second end 22 is mounted on the second bearing 1121, the cost of the needle clamping mechanism 100 can be reduced while ensuring reliable rotation of the needle 2.

[0090] Both the first bearing 1111 and the second bearing 1121 described above can be deep groove ball bearings or other possible bearings, and the present embodiment does not limit this.

[0091] Considering that before or after the battery cell D is flattened by the battery cell blanking clamping assembly 200, there is still an operation of transporting the battery cell D by the battery cell blanking clamping assembly 200. If the needle 2 is rotatable around the rotation axis O at this time, then under the action of gravity, the inner ring of the battery cell D will be slidable, which will cause abnormal deformation of the battery cell D. To avoid this situation, in some embodiments, refer to Figure 4 , the needle clamping mechanism 100 further includes a stopping component 3. The stopping component 3 is arranged on the needle holder 1, and the stopping component 3 is used to limit or allow the needle 2 to rotate.

[0092] Since the stopping component 3 can limit or allow the needle 2 to rotate, during the process of flattening the battery cell D by the battery cell blanking clamping assembly 200, the stopping component 3 can allow the needle 2 to rotate. In this way, the situation of wrinkles appearing in the inner ring of the battery cell D can be avoided. After the battery cell D is flattened, when the battery cell D is transported by the battery cell blanking clamping assembly 200, the stopping component 3 can prevent the needle 2 from rotating, thereby avoiding the situation of abnormal deformation of the battery cell D under the action of gravity.

[0093] It can be seen that when the needle clamping mechanism 100 further includes the stopping component 3, it can be decided to limit or allow the needle 2 to rotate according to different timings, making the function of the needle clamping mechanism 100 more abundant and suitable for more application scenarios.

[0094] Among them, there are various implementation manners of the above-mentioned stopping component 3. In one possible implementation manner, refer to Figure 4 , the stopping component 3 includes a first driving member 31 and a first abutting member 32. Among them, the first driving member 31 is arranged on the needle holder 1, the first abutting member 32 is connected to the first driving member 31, and the first driving member 31 is used to drive the first abutting member 32 to move towards or away from the needle 2 to abut against or disengage from the needle 2.

[0095] Since the first abutting member 32 is connected to the first driving member 31, when it is necessary to prevent the needle holder 2 from rotating, the first driving member 31 can drive the first abutting member 32 to move towards the needle holder 2, so that the first abutting member 32 abuts against the needle holder 2. In this way, a frictional force will be generated between the first abutting member 32 and the needle holder 2, and under the action of the frictional force, the needle holder 2 cannot rotate, thus achieving the purpose of preventing the needle holder 2 from rotating.

[0096] When it is necessary to allow the needle holder 2 to rotate, the first driving member 31 can drive the first abutting member 32 to move away from the needle holder 2, so that the first abutting member 32 disengages from the needle holder 2. In this way, the frictional force between the first abutting member 32 and the needle holder 2 will disappear, thus achieving the purpose of allowing the needle holder 2 to rotate.

[0097] Since when it is necessary to restrict or allow the needle holder 2 to rotate, it can be achieved by driving the first abutting member 32 to abut against or disengage from the needle holder 2 by the first driving member 31, and the implementation principle is very simple, the cost of the stopping assembly 3 can be reduced.

[0098] Of course, the above-mentioned stopping assembly 3 can also be implemented in other possible ways. For example, in another possible implementation, the stopping assembly 3 can include an electromagnet and a magnet. The magnet is arranged on the needle holder 2, and the electromagnet is arranged on the needle holder base 1 and is spaced opposite to the magnet. In this way, when it is necessary to prevent the needle holder 2 from rotating, the electromagnet can be powered on. In this way, a magnetic force will be generated between the electromagnet and the magnet, thus achieving the purpose of preventing the needle holder 2 from rotating. When it is necessary to allow the needle holder 2 to rotate, the electromagnet can be powered off. In this way, the magnetic force between the electromagnet and the magnet will disappear, thus achieving the purpose of allowing the needle holder 2 to rotate.

[0099] In some embodiments, referring to Figure 4 , the needle holder 2 has opposite first end 21 and second end 22 along the extension direction of the rotation axis O. The first abutting member 32 is located on the side of the first end 21 away from the second end 22 along the extension direction of the rotation axis O ( Figure 4 the right side of the first end 21 in ), and the first driving member 31 is used to drive the first abutting member 32 to move towards or away from the end face 211 of the first end 21 along the extension direction of the rotation axis O until it abuts against or disengages from the end face 211 of the first end 21, so as to restrict or allow the needle holder 2 to rotate.

[0100] Since the first abutment member 32 is located on the side of the first end 21 away from the second end 22 along the extension direction of the rotation axis O, the first driving member 31 is used to drive the first abutment member 32 to move along the extension direction of the rotation axis O toward or away from the end surface 211 of the first end 21. Therefore, when the first driving member 31 drives the first abutment member 32 to move along the extension direction of the rotation axis O toward the end surface 211 close to the first end 21, the first abutment member 32 can abut against the end surface 211 of the first end 21, thereby achieving the purpose of preventing the clamping needle 2 from rotating.

[0101] Since the first abutment member 32 abuts against the end surface 211 of the first end 21 to prevent the clamping needle 2 from rotating, the peripheral wall 23 of the clamping needle 2 can be left empty for abutting against the battery cell D, thereby reducing the possibility of the first abutment member 32 interfering with the abutment between the peripheral wall 23 of the clamping needle 2 and the battery cell D.

[0102] When the clamping needle 2 is prevented from rotating by making the first abutting member 32 abut against the end surface 211 of the first end 21, the first driving member 31 for driving the first abutting member 32 to move can be understood as a telescopic cylinder or a telescopic motor, etc., as long as it can drive the first abutting member 32 to move toward or away from the end surface 211 of the first end 21 along the extension direction of the rotation axis O, and this embodiment does not limit this. The first abutting member 32 can be understood as an abutment block, etc., and this embodiment does not limit this.

[0103] It should be noted that the first end 21 may be any one of the two ends of the clamping needle 2 .

[0104] Of course, preventing the clamping needle 2 from rotating by making the first abutting member 32 abut against the end surface 211 of the first end 21 is only one possible implementation method given in this embodiment. In another possible implementation method, see Figure 7 and Figure 8 , Figure 7 1 is a schematic structural diagram of another needle clamping mechanism 100 provided in one embodiment of the present application. Figure 8 yes Figure 7 A schematic structural diagram of the C position of the middle clamping needle mechanism 100 taken from the negative perspective along the Y-axis, wherein the first abutment member 32 is spaced apart on the peripheral wall 23 of the clamping needle 2, and the first driving member 31 is used to drive the first abutment member 32 to move along the radial direction of the clamping needle 2 toward or away from the peripheral wall 23 of the clamping needle 2 until it abuts against or disengages from the peripheral wall 23, so as to limit or allow the clamping needle 2 to rotate.

[0105] Since the first abutting member 32 is sleeved on the peripheral wall 23 of the needle holder 2 at intervals, and the first driving member 31 is used to drive the first abutting member 32 to move radially towards or away from the peripheral wall 23 of the needle holder 2, when the first driving member 31 drives the first abutting member 32 to move radially towards the peripheral wall 23 of the needle holder 2, the first abutting member 32 can abut against the peripheral wall 23 of the needle holder 2, and thus the purpose of preventing the needle holder 2 from rotating can be achieved.

[0106] When the first abutting member 32 achieves the purpose of preventing the needle holder 2 from rotating by abutting against the peripheral wall 23 of the needle holder 2, since the peripheral wall 23 is a curved surface, to a certain extent, the frictional force between the first abutting member 32 and the needle holder 2 can be increased, so as to better achieve the purpose of preventing the needle holder 2 from rotating.

[0107] Specifically, when preventing the needle holder 2 from rotating by making the first abutting member 32 abut against the peripheral wall 23 of the needle holder 2, referring to Figure 7 and Figure 8 , the first driving member 31 can be a clamping cylinder, and the first abutting member 32 can be two clamping jaws. In this way, when the first driving member 31 drives the first abutting member 32 to move radially towards the peripheral wall 23 of the needle holder 2, the first abutting member 32 can tightly hold the needle holder 2, so as to better achieve the purpose of preventing the needle holder 2 from rotating.

[0108] Among them, when preventing the needle holder 2 from rotating by abutting against the peripheral wall 23 of the needle holder 2, in order to avoid the first abutting member 32 occupying too large a size of the peripheral wall 23 and affecting the abutment between the peripheral wall 23 of the needle holder 2 and the inner circle of the battery cell D, referring to Figure 7 , the abutting position of the first abutting member 32 and the peripheral wall 23 can be close to the first end 21 of the needle holder 2. In this way, the possibility of the first abutting member 32 interfering with the abutment between the peripheral wall 23 of the needle holder 2 and the battery cell D can be reduced as much as possible.

[0109] Furthermore, when the first abutting member 32 abuts against the needle holder 2, in order to enhance the frictional force between the first abutting member 32 and the needle holder 2 and thus better prevent the needle holder 2 from rotating, in some embodiments, referring to Figure 4 , a friction member 321 is provided on the surface of the first abutting member 32 facing the needle holder 2.

[0110] By providing the friction member 321 on the surface of the first abutting member 32 facing the needle holder 2, on the one hand, the frictional force between the first abutting member 32 and the needle holder 2 can be enhanced, so as to better prevent the needle holder 2 from rotating. On the other hand, direct contact between the first abutting member 32 and the needle holder 2 can also be avoided, so as to avoid or reduce the possibility of the first abutting member 32 or the needle holder 2 being scratched.

[0111] Among them, the above-mentioned friction member 321 can be a rubber member or any other component that can enhance the frictional force between the first abutting member 32 and the pinching needle 2. This embodiment does not limit the friction member 321.

[0112] Figure 9 It is a schematic structural diagram of a cell blanking clamping assembly 200 provided by an embodiment of the present application. Refer to Figure 9 , and the cell blanking clamping assembly 200 includes a pinching needle mechanism 100.

[0113] Among them, the structure of the pinching needle mechanism 100 can be the same as that of any of the pinching needle mechanisms 100 described in the above embodiments, and can bring the same or similar beneficial effects. Specifically, reference can be made to the description of the pinching needle mechanism 100 in the above embodiments, and this embodiment will not be elaborated here.

[0114] In this embodiment, since the pinching needle 2 of the pinching needle mechanism 100 is rotatably arranged on the pinching needle seat 1 around the rotation axis O, when the cell blanking clamping assembly 200 includes the pinching needle mechanism 100, during the process of flattening the cell D by the cell blanking clamping assembly 200, the pinching needle 2 can rotate relative to the pinching needle seat 1 around the rotation axis O, and the inner ring of the cell D can slide along the circumferential direction of the cell D. Generally speaking, although the circumferential wall 23 of the pinching needle 2 abuts against the inner ring of the cell D, the pinching needle 2 does not completely fix the inner ring of the cell D, but allows the inner ring of the cell D to slide along the circumferential direction of the cell D for adaptive adjustment, so as to avoid the occurrence of wrinkles in the inner ring of the cell D, and further improve the quality of the cell D.

[0115] In some embodiments, refer to Figure 4 and Figure 9 , the cell blanking clamping assembly 200 further includes a first mounting seat 201, a second driving member 202 and a first clamping mechanism 203. Among them, the second driving member 202 is arranged on the first mounting seat 201. The pinching needle seat 1 of the pinching needle mechanism 100 and the first clamping mechanism 203 are both arranged on the first mounting seat 201, and the pinching needle 2 of the pinching needle mechanism 100 is opposite to the first clamping mechanism 203 in a direction perpendicular to the rotation axis O, and the second driving member 202 is connected to the first clamping mechanism 203 and / or the pinching needle seat 1.

[0116] Since the second driving member 202 is connected to the first clamping mechanism 203 and / or the needle holder 1, the second driving member 202 can drive the first clamping mechanism 203 and the needle 2 to approach or move away from each other in a direction perpendicular to the rotation axis O. When the second driving member 202 drives the first clamping mechanism 203 and the needle 2 to approach each other, the needle clamping mechanism 100 and the first clamping mechanism 203 can clamp the battery cell D at the inner and outer circles of the battery cell D, so as to achieve the purpose of clamping the battery cell D. When the second driving member 202 drives the first clamping mechanism 203 and the needle 2 to move away from each other, the purpose of releasing the battery cell D can be achieved.

[0117] Further, in some embodiments, referring to Figure 9 , the battery cell blanking clamping assembly 200 further includes a second mounting base 204, a third driving member 205, a fourth driving member 206, a second clamping mechanism 207 and a third clamping mechanism 208. The third driving member 205 is respectively connected to the second clamping mechanism 207 and / or the third clamping mechanism 208, and the fourth driving member 206 is respectively connected to the first mounting base 201 and / or the second mounting base 204. In this way, when the third driving member 205 drives the second clamping mechanism 207 and the third clamping mechanism 208 to approach or move away from each other, the purpose of clamping or releasing the battery cell D can be achieved. When the fourth driving member 206 drives the first mounting base 201 and the second mounting base 204 to move away from each other, the purpose of flattening the battery cell D can be achieved.

[0118] In some embodiments, the needle 2 and the first clamping mechanism 203 are used to clamp the battery cell D, and the length of the needle 2 along the extension direction of the rotation axis O is greater than or equal to the length of the battery cell D.

[0119] Since the length of the needle 2 along the extension direction of the rotation axis O is greater than or equal to the length of the battery cell D, the battery cell D can be completely covered by the needle 2 along the extension direction of the needle 2. And the needle 2 is rotatable, so that the situation that the non-rotatable part of the needle clamping mechanism 100 contacts the battery cell D can be avoided, and thus the situation that the inner circle of the battery cell D wrinkles can be better avoided.

[0120] An embodiment of the present application further provides a winding device 300, referring to Figure 1 , the winding device 300 includes a battery cell blanking clamping assembly 200.

[0121] Among them, the structure of the battery cell blanking clamping assembly 200 can be the same as the structure of any one of the above-mentioned battery cell blanking clamping assemblies 200, and can bring the same or similar beneficial effects. For details, reference can be made to the description of the battery cell blanking clamping assembly 200 in the above embodiments, and details will not be repeated in this embodiment.

[0122] In this embodiment, since the cell blanking clamping assembly 200 can avoid the occurrence of wrinkles in the inner ring of the cell D when flattening the cell D. Based on this, when the winding device 300 includes the cell blanking clamping assembly 200, the quality of the cell D produced by the winding device 300 can be better.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A needle clamping mechanism (100), characterized in that, Comprising: A needle clamping seat (1); And, A needle clamp (2), the needle clamp (2) being rotatably arranged on the needle clamping seat (1).

2. The pin clamping mechanism (100) according to claim 1, characterized in that, The needle clamp (2) has opposite first and second ends (21, 22), the first end (21) being rotatably arranged on the needle clamping seat (1), and / or the second end (22) being rotatably arranged on the needle clamping seat (1).

3. The pin clamping mechanism (100) according to claim 1, characterized in that, The needle clamp (2) has opposite first and second ends (21, 22), an installation groove (11) is arranged on the needle clamping seat (1), the installation groove (11) includes opposite first and second groove walls (111, 112), the needle clamp (2) is accommodated in the installation groove (11), the first end (21) is rotatably arranged on the first groove wall (111), and the second end (22) is rotatably arranged on the second groove wall (112).

4. The pin clamping mechanism (100) according to claim 3, characterized in that, A first bearing (1111) is arranged on the first groove wall (111), a second bearing (1121) is arranged on the second groove wall (112), the first end (21) is installed in the first bearing (1111), and the second end (22) is installed in the second bearing (1121).

5. The needle clamping mechanism (100) according to any one of claims 1-4, characterized in that, The needle clamping mechanism (100) further includes a stopping component (3), the stopping component (3) including: A first driving member (31), the first driving member (31) being arranged on the needle clamping seat (1); and, A first abutting member (32), the first abutting member (32) being connected to the first driving member (31).

6. The pin clamping mechanism (100) according to claim 5, characterized in that, The needle clamp (2) has opposite first and second ends (21, 22), the first driving member (31) is used to drive the first abutting member (32) to move towards or away from the end face (211) of the first end (21) until it abuts against or disengages from the end face (211) of the first end (21), so as to restrict or allow the needle clamp (2) to rotate.

7. The needle clamping mechanism (100) according to claim 5, characterized in that, The first abutting member (32) is sleeved at intervals on the peripheral wall (23) of the needle clamp (2), the first driving member (31) is used to drive the first abutting member (32) to move along the radial direction of the needle clamp (2) towards or away from the peripheral wall (23) of the needle clamp (2) until it abuts against or disengages from the peripheral wall (23), so as to restrict or allow the needle clamp (2) to rotate.

8. The needle clamping mechanism (100) according to claim 5, characterized in that, A friction member (321) is arranged on the surface of the first abutting member (32) facing the needle clamp (2).

9. The pin clamping mechanism (100) according to any one of claims 1-4 or 6-8, characterized in that, The needle clamp (2) includes an arc surface.

10. The pin clamping mechanism (100) according to claim 9, characterized in that, The needle clamp (2) is a cylinder or an ellipsoid cylinder, and the peripheral wall of the cylinder or the peripheral wall of the ellipsoid cylinder forms the arc surface.

11. A cell blanking clamping assembly (200), characterized in that, Including the needle clamping mechanism (100) according to any one of claims 1-10.

12. The cell blanking clamping assembly (200) according to claim 11, wherein, Further comprising: A second driving member (202); and, A first clamping mechanism (203), the needle clamp (2) of the needle clamping mechanism (100) being opposite to the first clamping mechanism (203), the second driving member (202) being connected to the first clamping mechanism (203) and / or the needle clamping seat (1).

13. The cell blanking clamping assembly (200) according to claim 12, characterized in that, The pinching needle (2) and the first clamping mechanism (203) are used to clamp the battery cell (D), and the length of the pinching needle (2) is greater than or equal to the length of the battery cell (D).

14. A winding device (300), characterized in that, Comprising the battery cell blanking clamping assembly (200) according to any one of claims 11-13.

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