Battery cell blanking device, battery cell blanking method, and winding apparatus

Abstract

The application discloses a kind of electric core blanking device, electric core blanking method and winding equipment, the electric core blanking device includes two clamping components, interval arrangement along first direction, two clamping components can be close or far away along first direction, and reciprocate along second direction perpendicular to first direction;Each clamping component includes at least two clamping needles, at least two clamping needles can be controllably clamped electric core, at least two clamping needles are respectively used to clamp the inner circle of electric core and the outer circle of electric core, at least two clamping needles extend along second direction;Wherein, at least one of at least two clamping needles is provided with floating component, floating component is used to abut electric core, and floating component can be elastically stretched and contracted along first direction, to move along first direction relative to clamping needle and / or swing relative to clamping needle.Floating component can be self-adaptively adjusted according to the deformation condition of clamping needle Stretching and contracting state of itself, so that two clamping needles always keep clamping electric core.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a cell feeding device, a cell feeding method, and a winding device. Background Technology

[0002] With the rapid development of the battery industry, the quality requirements for battery cells are becoming increasingly stringent. Battery cells are typically formed using winding equipment and removed from the winding needle using a cell unwinding device. During the unwinding process, the unwinding device usually clamps the inner and outer rings of the cell to pull the winding needle out of the cell's inner cavity. After the winding needle is removed, the cell needs to be stretched to facilitate subsequent flattening operations.

[0003] However, during the stretching of the battery cell, the clamping pins inserted into the cell's inner cavity are prone to deformation due to stress. This deformation not only affects the pins' lifespan but can also lead to problems such as wrinkles in the inner separator and electrode sheets during the stretching process, impacting the cell's manufacturing quality and consequently negatively affecting the performance and lifespan of the battery product composed of these cells. Summary of the Invention

[0004] This application discloses a battery cell feeding device, a battery cell feeding method, and a winding device. The battery cell feeding device sets a floating component on the clamping pins in the clamping assembly used to hold the battery cell, so that even if the clamping pins are deformed or unevenly installed, the clamping pins can still maintain the clamping state with the battery cell, while avoiding the battery cell from wrinkling and ensuring the quality of the battery cell.

[0005] To achieve the above objectives, a first aspect of this application discloses a battery cell unloading device, comprising: two clamping assemblies spaced apart along a first direction, the two clamping assemblies being capable of moving closer or further away along the first direction and reciprocating along a second direction perpendicular to the first direction; each clamping assembly including at least two clamping pins, the at least two clamping pins being controllably capable of clamping a battery cell, the at least two clamping pins being respectively used to clamp the inner ring and outer ring of the battery cell, the at least two clamping pins extending along the second direction; wherein, at least one of the at least two clamping pins is provided with a floating component, the floating component being used to abut against the battery cell, the floating component being capable of elastically extending and retracting along the first direction to move relative to the clamping pin along the first direction and / or swing relative to the clamping pin.

[0006] The cell feeding device provided in this application embodiment, by setting a floating component on at least one of the two clamping pins in the clamping assembly, can, on the one hand, reduce the start and stop times of the clamping assembly stretching the cell, offset the force of the cell on the clamping pin, thereby providing buffer protection for the clamping pin and preventing excessive force and deformation. On the other hand, even if the clamping pin deformation is unavoidable due to excessive force, the floating component can adaptively adjust its own extension and contraction state according to the deformation of the clamping pin, keeping it in close contact with the cell at all times, thus ensuring that the two clamping pins always maintain effective clamping of the cell. This ensures that even if the clamping pin deforms, the cell will not suffer from problems such as separator and electrode wrinkling, improving the production quality of the cell, enhancing the stability of battery performance, and extending battery life.

[0007] In one possible implementation of the first aspect, the floating component includes: a floating member for abutting against the battery cell; an elastic member, one end of which abuts against the floating member and the other end of which abuts against a clamping pin; wherein the battery cell can drive the floating member to move along a first direction, causing the elastic member to deform along the first direction, and when the elastic member is unfolded, the elastic member can drive the floating member to swing relative to the clamping pin.

[0008] In one possible implementation of the first aspect, a mounting groove is provided on the side of the clamping pin facing the battery cell, and a guide portion is formed on the side of the floating member facing the clamping pin, with at least a portion of the guide portion extending into the mounting groove; wherein, one end of the elastic member abuts against the groove wall of the mounting groove, and the other end of the elastic member is provided in the guide portion, which is capable of moving in the mounting groove along a first direction.

[0009] In one possible implementation of the first aspect, the guide portion has a plurality of mounting holes on its surface facing the mounting groove, and the plurality of mounting holes are spaced apart along the second direction; the number of elastic elements is plurality, and the plurality of elastic elements are respectively disposed in the plurality of mounting holes.

[0010] In one possible implementation of the first aspect, the floating component further includes a rotating shaft disposed near the end of the clamping needle, and the floating element is rotatably connected to the clamping needle via the rotating shaft.

[0011] In one possible implementation of the first aspect, each clamping assembly further includes a limiting assembly, which is pressed against the end of the floating member along the second direction and fixedly disposed on the clamping pin, the limiting assembly being used to limit the movement stroke of the floating member.

[0012] In one possible implementation of the first aspect, the limiting component includes: a connector disposed at the end of the floating member and extending in a second direction; a pressure block, at least partially pressed against the connector, the pressure block being used to limit the movement stroke of the floating member and forming an movable gap with the floating member; and a fastener that avoids the connector and passes through the pressure block, and fixes the pressure block to the clamping pin.

[0013] In one possible implementation of the first aspect, along the first direction, the limiting component does not protrude beyond the outer surface of the floating member used to abut against the battery cell.

[0014] In one possible implementation of the first aspect, one of the at least two clamping pins in each clamping assembly is a first clamping pin, the first clamping pin being used to clamp the inner ring of the battery cell, and the surface of the floating member disposed on the first clamping pin for abutting the inner ring of the battery cell being configured as a convex arcuate surface.

[0015] In one possible implementation of the first aspect, one of the at least two clamping pins in each clamping assembly is a second clamping pin for clamping the outer ring of the battery cell, and the surface of the floating member in the floating assembly of the second clamping pin for abutting the outer ring of the battery cell is configured as a plane.

[0016] In one possible implementation of the first aspect, the clamping assembly further includes: a support member, wherein the fixed end of the first clamping pin is disposed on the support member, and the second clamping pin is movably disposed on the support member; and a driving member, disposed on the support member and connected to the second clamping pin, to drive the second clamping pin to move closer to or further away from the first clamping pin in a first direction, so that the two clamping pins can controllably clamp the battery cell.

[0017] In one possible implementation of the first aspect, the cell feeding device further includes: two first driving devices, each of the two first driving devices being connected to a support member in a corresponding clamping assembly, the first driving devices being used to drive the clamping assembly to move closer to or away from the cell along a second direction; and a second driving device, the two driving ends of the second driving device being respectively connected to the two first driving devices to drive the two first driving devices to move closer to or away from each other along a first direction.

[0018] In one possible implementation of the first aspect, a floating component is provided on each clamping pin in each clamping assembly.

[0019] The second aspect of this application also provides a method for feeding a battery cell, which is applied to the battery cell feeding device provided in the first aspect of this application. The method includes: moving a clamping assembly along a second direction; inserting a first clamping pin of at least two clamping pins of the clamping assembly and a floating component disposed on the first clamping pin into the feeding hole of the battery cell; moving a second clamping pin of at least two clamping pins of the clamping assembly along a first direction and abutting against the outer ring of the battery cell, so that the clamping assembly clamps the battery cell; moving the two clamping assemblies away from each other along the first direction to open the battery cell; stopping the movement of the two clamping assemblies when they reach a target position; and releasing the battery cell and resetting along the second direction to complete the feeding of the battery cell.

[0020] In a possible implementation of the second aspect, the clamping assembly releases the battery cell and resets along the second direction, including: resetting the second clamping pin along the first direction; moving the two clamping assemblies closer to each other along the first direction so that a gap is formed between the floating component disposed on the first clamping pin and the inner ring of the battery cell; and resetting the clamping assembly along the second direction.

[0021] A third aspect of this application also provides a winding apparatus, which includes the cell feeding device provided in the first aspect embodiment of this application.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram illustrating the process of stretching a battery cell using the battery cell feeding device according to an embodiment of this application.

[0026] Figure 3 This is one of the structural schematic diagrams of a floating component mounted on the first clamping pin in the battery cell feeding device according to an embodiment of this application;

[0027] Figure 4 for Figure 3 Sectional view at point AA;

[0028] Figure 5 This is a second schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application, in which a floating component is provided on the first clamping pin.

[0029] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0030] Figure 7 This is the third schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application, in which a floating component is provided on the first clamping pin;

[0031] Figure 8 This is one of the structural schematic diagrams of a floating component mounted on the second clamping pin in the battery cell feeding device according to an embodiment of this application;

[0032] Figure 9This is a second schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application, in which a floating component is provided on the second clamping pin.

[0033] Figure 10 for Figure 9 Sectional view at point BB;

[0034] Figure 11 This is the third schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application, in which a floating component is provided on the second clamping pin;

[0035] Figure 12 This is the fourth schematic diagram of the structure of the battery cell feeding device according to an embodiment of this application, in which a floating component is provided on the second clamping pin;

[0036] Figure 13 for Figure 12 Enlarged view of point B in the middle;

[0037] Figure 14 This is a schematic flowchart of the cell cutting method according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Battery cell feeding device; 10. Clamping assembly; 100. Clamping pin; 101. First clamping pin; 102. Second clamping pin; 103. Mounting groove; 104. Support component; 105. Driving component; 20. Battery cell; 201. Inner ring of battery cell; 202. Outer ring of battery cell; 203. Feeding hole; 30. Floating assembly; 301. Floating component; 302. Elastic component; 303. Guide part; 304. Mounting hole; 305. Rotating shaft; 40. Limiting assembly; 401. Pressure block; 402. Fastener; 403. Connector; 50. First driving device; 60. Second driving device. Detailed Implementation

[0040] 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.

[0041] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "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.

[0042] 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.

[0043] 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.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (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, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] With continuous technological advancements, the application scope of power batteries is constantly expanding. Power batteries are already widely used in hydropower, thermal power, wind power, solar power plants, and electric vehicles. With the continuous growth of market demand, the prospects for power batteries are even broader.

[0046] In the battery manufacturing process, electrode sheets and separators are mainly wound using winding equipment to form battery cells. After the battery cells are wound on the winding needles, they are typically unloaded using a battery cell unloading device. This unloading device usually includes two clamping assemblies, each with at least two clamping pins. After the battery cell is clamped by the two pins, the winding needles are retracted, and the two clamping assemblies stretch the battery cell, changing it from a round shape to a flattened shape. During the unloading process, because the clamping pins are cantilevered, they are prone to deformation when stretching the battery cell. This can cause at least two pins to fail to clamp the inner and outer rings of the battery cell tightly, resulting in wrinkles on the inner ring. The battery cell unloading device provided in this application, by incorporating floating components on the clamping pins, ensures that the two clamping pins always maintain a tight grip on the inner and outer rings of the battery cell, preventing wrinkles in the separator.

[0047] like Figure 1The diagram shows a schematic of a battery cell feeding device 1, which includes two clamping components 10, spaced apart along a first direction. The two clamping components 10 are capable of moving closer or further away along the first direction and reciprocating along a second direction perpendicular to the first direction. Each clamping component 10 includes at least two clamping pins 100, which can controllably clamp a battery cell 20. The at least two clamping pins 100 are respectively used to clamp the inner ring 201 and the outer ring 202 of the battery cell 20. The at least two clamping pins 100 extend along the second direction. At least one of the at least two clamping pins 100 is provided with a floating component 30, which is used to abut against the battery cell 20. The floating component 30 is capable of elastic extension and retraction along the first direction to move relative to the clamping pin 100 along the first direction and / or swing relative to the clamping pin 100.

[0048] In this embodiment, the cell feeding device 1 includes two clamping assemblies 10, which are spaced apart along a first direction. The two clamping assemblies 10 can move closer or further away along the first direction. During the process of clamping and moving away from the cell 20, the clamping assemblies 10 stretch the cell 20. After stretching the cell 20, they move closer together again to perform the next stretching action. The two clamping assemblies 10 can also reciprocate along a second direction perpendicular to the first direction, so that the clamping pin 100 is inserted into the feeding hole 203 of the cell 20 along the second direction, thereby realizing the subsequent stretching operation of the cell 20. The first direction is... Figure 1 The left and right directions, the second direction is Figure 1 The up and down directions in the middle.

[0049] Each clamping assembly 10 includes at least two clamping pins 100, both of which extend along a second direction and form a cantilever structure. This application embodiment uses a clamping assembly 10 comprising two clamping pins 100 as an example for illustration. For ease of description, unless otherwise specified, the clamping pin 100 in the following embodiments can be either a first clamping pin 101 or a second clamping pin 102.

[0050] Please see Figure 1 and Figure 2 The two clamping pins 100 may include a first clamping pin 101 for clamping the inner ring 201 of the battery cell and a second clamping pin 102 for clamping the outer ring 202 of the battery cell, and at least one of the first clamping pin 101 and the second clamping pin 102 is provided with a floating component 30. Figure 2 (Not shown in the image). The floating component 30 on the clamping pin 100 can move synchronously with the clamping pin 100 along the first and second directions. For example... Figure 2 As shown in (a) above, the initial state of cell 20 is circular. Figure 2As shown in (b), the first clamping pin 101 can move in a second direction along with the floating component 30 disposed thereon and simultaneously insert into the feeding hole 203. The floating component 30 on the first clamping pin 101 abuts against the inner ring 201 of the battery cell. Then, the second clamping pin 102 can move controllably in a first direction simultaneously with the floating component 30 disposed thereon. The floating component 30 on the second clamping pin 102 abuts against the outer ring 202 of the battery cell. The first clamping pin 101 and the second clamping pin 102 complete the operation of clamping the battery cell 20. Figure 2 As shown in (c), the first clamping pin 101 and the second clamping pin 102 in each clamping assembly 10 clamp the battery cell 20, the two clamping assemblies 10 are moved away from each other along the first direction, and the initial circular battery cell 20 is stretched into a flat battery cell 20.

[0051] The floating component 30 has the ability to elastically expand and contract along a first direction. Optionally, the floating component 30 may be provided with an elastic element 302 so that the floating component 30 has the ability to elastically expand and contract along the first direction. The floating component itself may also be formed of a material with strong elasticity, such as rubber, so that it can expand and contract along the first direction.

[0052] When a floating component 30 is provided on the first clamping pin 101, at the initial moment when the first clamping pin 101 and the second clamping pin 102 clamp the battery cell 20 and perform a stretching movement, the battery cell 20 exerts a force on the first clamping pin 101 that is opposite to the direction of movement of the first clamping pin 101. Since the floating component 30 provided on the first clamping pin 101 is compressed and thus generates an elastic force in the first direction, the floating component 30 can counteract the force exerted by the battery cell 20 on the first clamping pin 101, thereby forming a buffer protection for the first clamping pin 101 and preventing the first clamping pin 101 from being deformed due to excessive force.

[0053] When a floating component 30 is provided on the second clamping pin 102, at the end of the stretching motion of the first clamping pin 101 and the second clamping pin 102 on the battery cell 20, the second clamping pin 102 stops moving, and the battery cell 20 exerts a force on the second clamping pin 102. Since the floating component 30 provided on the second clamping pin 102 is compressed, it generates an elastic force along the first direction. Therefore, the floating component 30 can counteract the force exerted by the battery cell 20 on the second clamping pin 102, so as to form a buffer protection for the second clamping pin 102 and prevent the second clamping pin 102 from being deformed due to excessive force.

[0054] If the clamping pin 100 is subjected to excessive reaction force from the battery cell 20, causing unavoidable deformation of the clamping pin 100, the gap between the first clamping pin 101 and the second clamping pin 102 may increase, making it impossible to clamp the battery cell 20. In this case, since the floating component 30 provided on the clamping pin 100 has the ability to elastically expand and contract along the first direction, the floating component 30 can expand along the first direction to ensure that the distance between the two floating components 30 (when both the first clamping pin 101 and the second clamping pin 102 are provided with floating components 30) or between the floating component 30 and the clamping pin 100 (when one of the first clamping pin 101 or the second clamping pin 102 is provided with floating component 30) is always equal to the wall thickness of the battery cell 20. That is, the floating component 30 always remains in contact with the battery cell 20, so that the two clamping pins 100 always maintain effective clamping of the battery cell 20, thereby avoiding wrinkling of the battery cell 20 separator due to deformation of the clamping pin 100.

[0055] It should be noted that, since the clamping pin 100 is a cantilever structure, if deformation of the clamping pin 100 is unavoidable, the deformation at different positions of the clamping pin 100 may vary, with the deformation at the free end of the clamping pin 100 potentially being more severe than that at the fixed end. Correspondingly, the elastic force released at different positions of the floating component 30 will also vary accordingly. For example, since the deformation at the free end of the clamping pin 100 is larger, the degree of expansion of the floating component 30 at the position corresponding to the free end of the clamping pin 100 will differ from the degree of expansion at other positions, causing the floating component 30 to oscillate relative to the clamping pin 100. Therefore, at the initial and final moments of the clamping component stretching the battery cell, the floating component 30 may be able to perform a translational movement relative to the clamping pin 100 in the first direction to provide overall buffer protection for the clamping pin 100. When the deformation of the clamping pin 100 has occurred, the floating component 30 can also swing relative to the clamping pin 100 according to the deformation of the clamping pin 100. While swinging relative to the clamping pin 100, the floating component 30 may also move along the first direction, so that the floating component 30 can adaptively adjust the degree of extension at different positions according to the deformation of the clamping pin 100 to maintain the contact state with the battery cell 20, so that the two clamping pins 100 always maintain effective clamping of the battery cell 20.

[0056] In addition, the floating component 30 provided on the first clamping pin 101 and / or the second clamping pin 102 can adaptively adjust its extension and retraction state according to the thickness of the cell 20, which also reduces the debugging time of the clamping component 10 for on-site debugging personnel.

[0057] Thus, by providing a floating component 30 on at least one of the two clamping pins 100 in the clamping assembly 10, the force exerted by the cell 20 on the clamping pin 100 during the stretching process of the clamping assembly 10 can be reduced, thereby providing buffer protection for the clamping pin 100 and preventing it from deforming due to excessive force. On the other hand, even if the clamping pin 100 deforms due to excessive force, the floating component 30 can adaptively adjust its extension and retraction state according to the deformation of the clamping pin 100, keeping it in close contact with the cell 20, thus ensuring that the two clamping pins 100 always effectively clamp the cell 20. Even if the clamping pin 100 deforms, the problem of wrinkling of the separator and electrode sheets in the cell 20 will not occur, improving the production quality of the cell 20 and enhancing the stability of battery performance and battery life.

[0058] In another embodiment, the floating component 30 includes a floating member 301 and an elastic member 302. The floating member 301 is used to abut against the battery cell 20; one end of the elastic member 302 abuts against the floating member 301, and the other end of the elastic member 302 abuts against a clamping pin 100; wherein, the battery cell 20 can drive the floating member 301 to move along a first direction, causing the elastic member 302 to deform along the first direction, and when the elastic member 302 is unfolded, the elastic member 302 can drive the floating member 301 to swing relative to the clamping pin 100.

[0059] Please refer to the following documents separately. Figure 3 and Figure 4 A floating component 30 is provided on the first clamping pin 101 of the two clamping pins 100, and please refer to Figure 8 , Figure 9 and Figure 10 A floating component 30 is provided on the second clamping pin 102 of the two clamping pins 100. The floating component 301 is used to abut against the battery cell 20. The floating component 301 extends in the same direction as the clamping pin 100, both extending in the second direction. The floating component 301 is disposed on the surface of the clamping pin 100 facing the battery cell 20.

[0060] like Figure 4 and Figure 10 As shown, an elastic element 302 is sandwiched between the floating element 301 and the clamping needle 100. One end of the elastic element 302 abuts against the clamping needle 100, and the other end of the elastic element 302 abuts against the floating element 301. The elastic element 302 can be a spring or other elastic elements with elastic deformation function, such as a rubber pad.

[0061] It is understood that the two ends of the elastic member 302 can respectively form an abutting and connecting relationship with the clamping pin 100 and the floating member 301, so that the floating member 301 can form a movable connection with the clamping pin 100. Of course, the elastic member 302 can also only form an abutting relationship with the clamping pin 100 and the floating member 301, and the floating member 301 can form a movable connection with the clamping pin 100 through other components (such as the limiting components provided in other embodiments of this application).

[0062] At the initial moment when the clamping assembly 10 stretches the battery cell 20, the battery cell 20 exerts a force on the floating member 301 on the first clamping pin 101 in the opposite direction to the movement of the first clamping pin 101. The floating member 301 moves along the first direction, causing the elastic member 302 on the first clamping pin 101 to be compressed and generate an elastic force. This elastic force can offset part of the force exerted by the battery cell 20 on the first clamping pin 101, preventing the first clamping pin 101 from being deformed due to excessive force. Similarly, at the end moment when the clamping assembly 10 finishes stretching the battery cell 20, the second clamping pin 102 stops moving. The battery cell 20 exerts a force on the floating member 301 on the second clamping pin 102. The floating member 301 moves along the first direction, causing the elastic member 302 on the second clamping pin 102 to be compressed and generate an elastic force. This elastic force can offset part of the force exerted by the battery cell 20 on the second clamping pin 102, preventing the second clamping pin 102 from being deformed due to excessive force.

[0063] If the force on the first clamping pin 101 or the second clamping pin 102 is too great and deformation is unavoidable, the distance between the first clamping pin 101 and the second clamping pin 102 may increase. The increased distance allows the elastic member 302 to change from a compressed state to an "unfolded state". The elastic member 302 pushes the floating member 301 closer to the battery cell 20, so that the floating member 301 always remains in contact with the battery cell 20.

[0064] It should be noted that, due to the cantilever structure of the clamping pin 100, the deformation of the clamping pin 100 varies at different positions, and the deformation of the free end of the clamping pin 100 may be more severe than that of the fixed end. Therefore, the amount of extension and retraction released at different positions of the elastic element 302 also varies accordingly. When the degree of expansion of the elastic element 302 corresponding to the free end of the clamping pin 100 is greater than the degree of expansion of the elastic element 302 corresponding to the fixed end of the clamping pin 100, the floating element 301 will swing relative to the clamping pin 100. That is, the floating element 301 can not only translate relative to the clamping pin 100 in the first direction under the elastic force generated by the expansion of the elastic element 302, but also swing relative to the clamping pin 100 due to the different degrees of expansion of the elastic element 302 in the first direction at different positions. This allows the floating element 301 to adaptively maintain a close fit with the battery cell 20 according to the deformation of the clamping pin 100, so that the two clamping pins 100 always maintain effective clamping of the battery cell 20.

[0065] Thus, the floating assembly 30 includes a floating member 301 and an elastic member 302 that abut against the battery cell 20. This allows the floating member 301 to contact the battery cell 20 before the clamping pin 100, and the elastic member 302 to offset part of the force exerted by the battery cell 20 on the clamping pin 100, preventing the clamping pin 100 from deforming due to excessive force. When deformation of the clamping pin 100 is unavoidable, the elastic member 302 unfolds and pushes the floating member 301 closer to the battery cell 20 to always abut against the battery cell 20, thereby keeping the two clamping pins 100 in a clamping state.

[0066] In order to enable the floating member 301 to move relative to the clamping pin 100 in the first direction, in another embodiment, the clamping pin 100 is provided with a mounting groove on the side facing the battery cell 20, and the floating member 301 is provided with a guide portion 303 on the side facing the clamping pin 100, at least part of the guide portion 303 extends into the mounting groove; wherein, one end of the elastic member 302 abuts against the groove wall of the mounting groove, and the other end of the elastic member 302 is provided in the guide portion 303, and the guide portion 303 can move in the mounting groove in the first direction.

[0067] Please see Figure 4 and Figure 10 The clamping pin 100 has a mounting groove on the side facing the battery cell 20, and the depth of the mounting groove extends along a first direction. The floating member 301 has a guide portion 303 protruding outward on the side facing the clamping pin 100. At least part of the guide portion 303 extends into the mounting groove. The width of the guide portion 303 can be slightly smaller than the opening of the mounting groove, so that the guide portion 303 can keep moving along the first direction in the mounting groove. The floating member 301 will not deviate during the movement and will always be located between the clamping pin 100 and the battery cell 20 along the first direction. Thus, the floating assembly 30 can maximize the counteraction of the force exerted by the battery cell 20 on the clamping pin 100.

[0068] One end of the elastic element 302 can abut against the wall of the mounting groove, and the other end is disposed on the guide element. In this way, the elastic element 302 is not exposed to the floating element 301, so that the floating element 301 provides structural protection for the elastic element 302.

[0069] In another embodiment, the guide portion 303 has a plurality of mounting holes 304 on its surface facing the mounting groove, and the plurality of mounting holes 304 are spaced apart along the second direction; there are a plurality of elastic members 302, and the plurality of elastic members 302 are respectively disposed in the plurality of mounting holes 304.

[0070] The guide portion 303 has a plurality of mounting holes 304 on its surface facing the mounting groove, and the plurality of mounting holes 304 are spaced apart along the second direction. Correspondingly, there are also a plurality of elastic members 302, which are spaced apart along the second direction in a plurality of mounting spaces of the guide portion 303.

[0071] It is worth noting that, since the clamping pin 100 is a cantilever structure, if the force applied to the clamping pin 100 is too large and deformation is inevitable, the deformation of the clamping pin 100 will be more pronounced at the free end. Distributing the elastic elements 302 at intervals along the second direction on the floating element 301 will result in different deformations at different positions of the clamping pin 100, which will also cause differences in the elastic deformation of the corresponding elastic elements 302. For example, the deformation of the clamping pin 100 may reach its maximum at the free end, resulting in a greater degree of expansion of the elastic elements 302 near the free end of the clamping pin 100 than that near the fixed end. This will cause the floating element 301 to oscillate relative to the clamping pin 100, allowing the floating element 301 to maintain a constant contact with the battery cell 20.

[0072] Please see Figure 9 , Figure 12 and Figure 13 The floating component 30 may also include a rotating shaft 305. The rotating shaft 305 is disposed near the end of the clamping pin 100, and the floating component 301 is rotatably connected to the clamping pin 100 via the rotating shaft 305.

[0073] In this embodiment, by setting a rotating shaft 305 on the clamping needle 100 and positioning the rotating shaft 305 near the fixed end of the clamping needle 100, the oscillation of the floating member 301 relative to the clamping needle 100 can be converted into the rotation of the floating member 301 with the rotating shaft 305 as a reference, making the rotation of the floating member 301 more stable and the movement trajectory of the floating member 301 more regular.

[0074] Optionally, the rotating shaft 305 can be a pin, which is disposed in the clamping needle 100 and located in the mounting groove. The guide portion 303 has a through hole through which the pin passes, thereby allowing the floating member 301 to rotate relative to the clamping needle 100.

[0075] In another embodiment, each clamping assembly 10 further includes a limiting assembly 40. The limiting assembly 40 is pressed against the end of the floating member 301 along the second direction and fixedly disposed on the clamping pin 100, and the limiting assembly 40 is used to limit the movement stroke of the floating member 301.

[0076] Please see Figure 5 , Figure 6 , Figure 11 , Figure 12 and Figure 13 The clamping assembly 10 is also provided with a limiting assembly 40, which is located at the end of the floating member 301 along the second direction and fixed to the clamping pin 100.

[0077] It is understandable that, especially when there is no connection between the elastic element 302 and the clamping needle 100 and the floating element 301, it is necessary to limit the movement of the floating element 301 along the first direction by the limiting component 40 to prevent the floating element 301 from disengaging from the clamping needle 100.

[0078] Specifically, since the floating member 301 can move in the mounting groove of the clamping needle 100 through the guide part 303, the limiting component 40 provided in the clamping needle 100 can limit the movement stroke of the floating member 301 along the first direction and the swing range of the floating member 301 relative to the clamping needle 100, thereby preventing the floating member 301 from coming out of the mounting groove and preventing the swing of the floating member 301 from exceeding the maximum extension range of the elastic member 302, ensuring that the floating member 301 can move stably relative to the clamping needle 100.

[0079] Furthermore, the limiting component 40 includes: a connector 403, a pressure block 401, and a fastener 402. The connector 403 is disposed at the end of the floating member 301 and extends along the second direction; the pressure block 401 is at least partially pressed against the connector 403, the pressure block 401 is used to limit the movement stroke of the floating member 301, and an movable gap is formed between the pressure block 401 and the floating member 301; the fastener 402 avoids the connector 403 and passes through the pressure block 401, and fixes the pressure block 401 to the clamp 100.

[0080] Please see Figure 7 The connector 403 is disposed at the end of the floating member 301 along the second direction and extends along the second direction, that is, the connector 403 protrudes from the floating member 301 along the second direction. Specifically, the connector 403 can be disposed at the end of the guide portion 303 and located in the mounting groove together with the guide portion 303, so that the connector 403 is not exposed on the outer surface of the floating member 301 used to abut against the battery cell 20.

[0081] The pressure block 401 is constructed as a bent structure. A portion of the pressure block 401 is pressed onto the surface of the connector 403 facing the cell 20 to limit the movement of the floating member 301 in the first direction. Another portion of the pressure block 401 is located at the end of the connector 403 in the second direction, which can also limit the movement range of the floating member 301 in the second direction.

[0082] The connector 403 is engaged within the area formed by the bent structure, and a movable gap is formed between the pressure block 401 and the floating member 301. The movable gap may include a gap between the pressure block 401 and the floating member 301 along a first direction, allowing the floating member 301 to translate relative to the clamping pin 100 along the first direction. The movable gap may also include a gap between the pressure block 401 and the floating member 301 along a second direction, allowing the floating member 301 to swing or rotate relative to the clamping pin 100.

[0083] The fastener 402 avoids the connector 403 and passes through the portion of the pressure block 401 extending in the second direction, and fixes the pressure block 401 to the surface of the clamping pin 100 facing the cell 20, thereby fixing the pressure block 401 to the clamping pin 100 so that the pressure block 401 can stably limit the movement stroke of the floating member 301.

[0084] Alternatively, fastener 402 can be a screw or a rivet.

[0085] Furthermore, along the first direction, the limiting component 40 does not protrude beyond the floating member 301 to abut against the outer surface of the battery cell 20.

[0086] In this way, it can be ensured that while the limiting component 40 limits the floating component 301 for a time limit, it will not protrude outward from the floating component 301 to abut against the outer surface of the battery cell 20. That is, the limiting component 40 will not scratch the inner ring 201 or the outer ring 202 of the battery cell, thereby avoiding the diaphragm of the battery cell 20 from being scratched and wrinkled.

[0087] To further ensure that the inner ring 201 of the battery cell does not wrinkle when the floating component 30 clamps the battery cell 20, in another embodiment, one of the at least two clamping pins 100 in each clamping component 10 is a first clamping pin 101. The first clamping pin 101 is used to clamp the inner ring 201 of the battery cell, and the surface of the floating member 301 disposed on the first clamping pin 101 that abuts against the inner ring 201 of the battery cell is constructed as a convex arc surface.

[0088] By adopting the above solution, please refer to the following: Figure 4 The surface of the floating member 301, which is provided on the first clamping pin 101 for holding the inner ring 201 of the battery cell, is constructed as a convex arc surface, so that when the floating member 301 contacts the inner ring 201 of the battery cell, it avoids damaging the electrode or diaphragm on the inner ring 201 of the battery cell.

[0089] At the same time, the convex arc surface can also improve the rigidity of the floating part 301 itself, making the floating part 301 less prone to deformation, thereby extending the service life of both the floating part 301 and the first clamping pin 101.

[0090] In another embodiment, one of the at least two clamping pins 100 in each clamping assembly 10 is a second clamping pin 102, which is used to clamp the outer ring 202 of the battery cell. The surface of the floating member 301 in the floating assembly 30 of the second clamping pin 102 that abuts against the outer ring 202 of the battery cell is configured as a plane.

[0091] Please see Figure 10 The floating member 301 on the second clamping pin 102 is used to abut against the outer ring 202 of the battery cell, and the surface of the floating member 301 abutting against the outer ring 202 of the battery cell is constructed as a plane.

[0092] It is understandable that during the stretching process of the battery cell 20, due to the certain thickness of the battery cell 20, the surface of the floating member 301 on the first clamping pin 101 is also a convex arc-shaped structure. Therefore, if the surface of the floating member 301 on the second clamping pin 102 that abuts against the outer ring 202 of the battery cell is also designed as an arc-shaped structure (e.g., an inwardly concave arc-shaped structure), then under the dual influence of the arc-shaped surface of the floating member 301 on the first clamping pin 101 and the arc formed by the wall thickness of the battery cell 20, the debugging and installation process of the second clamping pin 102 may become more complicated, and it may also cause the floating member 301 on the second clamping pin 102 to fail to clamp the outer ring 202 of the battery cell.

[0093] Thus, by designing the surface of the floating member 301 on the second clamping pin 102 that abuts against the outer ring 202 of the battery cell as a planar structure, the installation and debugging efficiency of the second clamping pin 102 can be improved.

[0094] In another embodiment, the clamping assembly 10 further includes a support member 104 and a drive member 105. The fixed end of the first clamping pin 101 is disposed on the support member 104, and the second clamping pin 102 is movably disposed on the support member 104; the drive member 105 is disposed on the support member 104 and connected to the second clamping pin 102 to drive the second clamping pin 102 to move closer to or away from the first clamping pin 101 in a first direction, so that the two clamping pins 100 can controllably clamp the battery cell 20.

[0095] Each clamping assembly 10 also includes a support member 104 and a drive member 105. The fixed end of the first clamping pin 101 is disposed on the support plate, and the fixed end of the second clamping pin 102 is movably disposed on the support member 104 along a first direction.

[0096] The driving member 105 is disposed on the support member 104 and connected to the second clamping pin 102, thereby driving the second clamping pin 102 to move closer to or further away from the first clamping pin 101 in a first direction, so that the second clamping pin 102 can be controllably clamped or released together with the first clamping pin 101. Since the driving member 105 can always drive the second clamping pin 102 to clamp the battery cell 20 together with the first clamping pin 101, even if the buffer assembly deforms at the start and stop time of stretching the battery cell 20, the battery cell 20 will not come out from between the first clamping pin 101 and the second clamping pin 102.

[0097] When it is necessary to unload the battery cell 20, the first clamping pin 101 and the second clamping pin 102 move toward the battery cell 20 along the second direction with the support member 104 until the first clamping pin 101 and the floating component 30 that may be disposed on the first clamping pin 101 are inserted into the unloading hole 203 of the battery cell 20. Then the driving member 105 drives the second clamping pin 102 to move closer to the first clamping pin 101, so that the first clamping pin 101 and the second clamping pin 102 can controllably clamp the battery cell 20.

[0098] After the first clamping pin 101 and the second clamping pin 102 clamp the battery cell 20, the winding pin can be pulled away from the inner ring 201 of the battery cell. The support members 104 of the two clamping assemblies 10 move away from each other in the first direction, thereby stretching the battery cell 20.

[0099] After the cell 20 is stretched, the drive member 105 drives the second clamping pin 102 to move away from the first clamping pin 101, so that the first clamping pin 101 and the second clamping pin 102 release the cell 20, and the support member 104 can be reset in the second direction, so that the first clamping pin 101 and the floating component 30 that may be set on the first clamping pin 101 are pulled away from the cell 20, thereby completing the unloading of the cell 20.

[0100] It is understandable that by reasonably setting the dimensions of the first clamping pin 101 and the floating component 30 set on the first clamping pin 101 according to the size of the feeding hole 203, and reasonably designing the deformation of the floating component 30, the first clamping pin 101 and the floating component 30 can be easily dislodged from the feeding hole 203, thereby successfully completing the feeding of the battery cell 20.

[0101] Alternatively, the drive element 105 can be a cylinder.

[0102] In another embodiment, the cell feeding device 1 further includes: two first driving devices 50 and a second driving device 60. Each of the two first driving devices 50 is connected to a support member 104 in the corresponding clamping assembly 10. The first driving device 50 is used to drive the clamping assembly 10 to move closer to or away from the cell 20 along a second direction. The two driving ends of the second driving device 60 are respectively connected to the two first driving devices 50 to drive the two first driving devices 50 to move closer to or away from each other along a first direction.

[0103] Two first driving devices 50 can be spaced apart along a first direction. The driving end of each first driving device 50 is connected to the support member 104 in the corresponding clamping assembly 10. The driving end of the first driving device 50 can reciprocate along a second direction, thereby driving the support member 104 to reciprocate along the second direction. This allows the clamping assembly 10 to move closer to or further away from the battery cell 20 under the drive of the first driving device 50, thereby completing the operation of inserting into the battery cell 20 and removing from the battery cell 20.

[0104] Optionally, the first drive unit 50 can be a cylinder.

[0105] The second driving device 60 can be disposed between two spaced first driving devices 50. The second driving device 60 can include two driving ends that reciprocate along a first direction. The two driving ends move in opposite directions, thereby driving the two first driving devices 50 to move closer or further away from each other. The two first driving devices 50 moving closer or further away from each other can drive the clamping components 10 disposed on the first driving devices 50 to move closer or further away from each other, thereby enabling the two clamping components 10 to stretch and flatten the battery cell 20.

[0106] In another embodiment, each clamping pin 100 in each clamping assembly 10 is provided with a floating assembly 30.

[0107] It is understandable that if a floating component 30 is provided on each of the first clamping pins 101 and each of the second clamping pins 102 in the two pairs of clamping assemblies 10, each clamping assembly 10 can maintain a stable clamping state on the battery cell 20, while also preventing deformation of the first clamping pins 101 and the second clamping pins 102, thereby improving the service life of the first clamping pins 101 and the second clamping pins 102. The technical effects of providing floating components 30 on the clamping pins 100 have been described in detail above and will not be repeated here.

[0108] Please see Figure 14 The second aspect of this application provides a method for cutting battery cells. This method can be applied to any of the battery cell cutting devices provided in the first aspect of this application. The method can be executed by a control device of the battery cell cutting device, and the method includes:

[0109] S1401, move the clamping assembly along the second direction and insert the first clamping pin of at least two clamping pins of the clamping assembly and the floating component disposed on the first clamping pin into the feeding hole of the battery cell.

[0110] The control device drives the clamping assembly to move along the second direction by controlling the first drive device in the cell feeding device, and controls the first clamping pin in the clamping assembly to align with the feeding hole of the cell. The control device then simultaneously inserts the first clamping pin and the floating assembly set on the clamping pin into the feeding hole of the cell.

[0111] S1402, the second of the at least two clamping pins of the clamping assembly is moved along the first direction and abuts against the outer ring of the battery cell, so that the clamping assembly clamps the battery cell;

[0112] The control device controls the driving component in the battery cell feeding device to drive the second clamping pin in the clamping assembly, so as to drive the second clamping pin to move closer to the first clamping pin until the second clamping pin moves to the outer ring of the battery cell and abuts against the outer ring of the battery cell, thereby enabling the clamping assembly to clamp the battery cell for subsequent stretching of the battery cell.

[0113] It should be noted that a floating component can also be provided on the second clamping pin. The floating component on the second clamping pin will move with the second clamping pin and abut against the outer ring of the battery cell, thereby allowing the clamping component to clamp the battery cell.

[0114] The winding equipment pulls out the winding needles from the battery cell, thus completing the retraction of the winding needles.

[0115] S1403, the two clamping components are moved away from each other in the first direction to open the battery cell. When the two clamping components move to the target position, the two clamping components stop moving.

[0116] The control device drives the clamping components to move away from each other along the first direction and to the target position by controlling the second drive device in the cell feeding device. Then, it controls the second drive device to stop driving, so that the two clamping components stop moving and the cell is stretched into a flat shape by the two clamping components.

[0117] S1404, causes the clamping assembly to release the battery cell and reset in the second direction, completing the battery cell unloading;

[0118] After the battery cell is stretched into a flat shape, the control device can control the drive component to drive the second clamping pin in the clamping assembly to move, thereby causing the clamping assembly to release the battery cell, in preparation for the subsequent separation of the clamping assembly from the battery cell.

[0119] The control device drives the two clamping components to reset along the second direction by controlling the first drive device, thereby completely separating the clamping components from the battery cell and completing the battery cell unloading.

[0120] Thus, by using the above method to cut the battery cell, and by incorporating a floating component on one of the clamping pins in the clamping assembly, the force exerted by the battery cell on the clamping pin is reduced during the stretching process, thereby buffering the pin and preventing excessive stress and deformation. Furthermore, even if excessive stress leads to unavoidable deformation, the floating component can adaptively adjust its extension and retraction based on the pin's deformation, maintaining a close fit to the battery cell. This ensures that the two clamping pins always effectively hold the cell. This prevents wrinkling of the separator and electrode sheets even if the clamping pin deforms. This battery cell cutting method improves the production quality of the battery cells, enhances the stability of battery performance, and extends battery life.

[0121] In another embodiment, the process of releasing the clamping assembly from the battery cell and resetting it in the second direction may include:

[0122] S14041, causing the second clamping pin to reset along the first direction;

[0123] When the battery cell is stretched into a flat shape, the control device controls the drive to drive the second clamping pin to perform a reset movement along the first direction, and the distance between the first clamping pin and the second clamping pin increases, allowing the clamping assembly to release the battery cell.

[0124] The distance that the second clamping pin moves to reset along the first direction can be the first distance.

[0125] S14042, bringing the two clamping assemblies closer to each other along a first direction, so that a gap is formed between the floating assembly on the first clamping pin and the inner ring of the battery cell.

[0126] The control device can drive the two clamping assemblies to move closer to each other along the first direction by controlling the second drive device. Since the floating component on the first clamping pin is in a compressed state during the process of opening the battery cell, when the two clamping assemblies move closer to each other along the first direction, the first clamping pin moves away from the inner ring of the battery cell, and the floating component can return to its initial state from the compressed state. Furthermore, a gap can be formed between the floating component on the first clamping pin and the inner ring of the battery cell in the clamping assembly to avoid mutual friction and wrinkling during the subsequent movement of the first clamping pin away from the battery cell along the second direction.

[0127] The aforementioned second distance can be greater than the maximum deformation of the floating component. In this way, the second distance of the clamping component movement can not only provide space for the floating component to return to its initial state, but also create a gap between the floating component that has returned to its initial state and the inner ring of the cell.

[0128] It is understandable that the second distance can be much smaller than the first distance. That is, as the clamping components move closer to each other along the first direction, the second clamping pin will not come into contact with the outer ring of the battery cell again. In this way, after the two clamping components move a second distance along the first direction, the first and second clamping pins can each have a gap with the battery cell. This ensures that during the subsequent process of the clamping components being pulled away from the battery cell along the second direction, no contact friction will occur between the clamping components and the battery cell, so as to avoid wrinkles forming on the battery cell's separator.

[0129] S14043, resets the clamping assembly in the second direction.

[0130] The control device drives the two clamping components to reset along the second direction by controlling the first drive device, thereby completely separating the clamping components from the battery cell and completing the battery cell unloading.

[0131] An embodiment of the third aspect of this application provides a winding apparatus, which includes any of the cell feeding devices provided in the first aspect of this application.

[0132] Since the winding equipment includes the cell feeding device 1 in any of the above embodiments of this application, it has the beneficial effects of the cell feeding device 1 in any of the above embodiments of this application, which will not be repeated here.

[0133] 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 battery cell feeding device (1), characterized in that, include: Two clamping components (10) are spaced apart along a first direction. The two clamping components (10) are capable of moving closer or further away along the first direction and reciprocating along a second direction perpendicular to the first direction. Each of the clamping components (10) includes at least two clamping pins (100) capable of controllably clamping the battery cell (20), the at least two clamping pins (100) being used to clamp the inner ring (201) and outer ring (202) of the battery cell (20), respectively, the at least two clamping pins (100) extending along the second direction; At least one of the at least two clamping pins (100) is provided with a floating component (30), the floating component (30) is used to abut the battery cell (20), and the floating component (30) is capable of elastic extension and retraction along the first direction to move relative to the clamping pin (100) along the first direction and swing relative to the clamping pin (100).

2. The cell feeding device (1) according to claim 1, characterized in that, The floating component (30) includes: A floating element (301) is used to abut against the battery cell (20). An elastic element (302) is provided, one end of which abuts against the floating element (301), and the other end of which abuts against the clamping pin (100). The battery cell (20) can drive the floating member (301) to move along the first direction, causing the elastic member (302) to deform along the first direction. When the elastic member (302) is unfolded, the elastic member (302) can drive the floating member (301) to swing relative to the clamping pin (100).

3. The cell feeding device (1) according to claim 2, characterized in that, The clamping pin (100) has a mounting groove (103) on the side facing the battery cell (20), and the floating member (301) has a guide portion (303) on the side facing the clamping pin (100), with at least a portion of the guide portion (303) extending into the mounting groove (103). One end of the elastic member (302) abuts against the groove wall of the mounting groove (103), and the other end of the elastic member (302) is disposed in the guide part (303). The guide part (303) can move in the mounting groove (103) along the first direction.

4. The cell feeding device (1) according to claim 3, characterized in that, The guide portion (303) has a plurality of mounting holes (304) on its surface facing the mounting groove (103), and the plurality of mounting holes (304) are spaced apart along the second direction; The number of elastic elements (302) is multiple, and the multiple elastic elements (302) are respectively disposed in the multiple mounting holes (304).

5. The cell feeding device (1) according to claim 2, characterized in that, The floating component (30) also includes: A rotating shaft (305) is disposed near the end of the clamping needle (100), and the floating member (301) is rotatably connected to the clamping needle (100) via the rotating shaft (305).

6. The cell feeding device (1) according to claim 2, characterized in that, Each clamping assembly (10) also includes: A limiting component (40) is pressed onto the end of the floating member (301) along the second direction and fixedly disposed on the clamping pin (100). The limiting component (40) is used to limit the movement stroke of the floating member (301).

7. The cell feeding device (1) according to claim 6, characterized in that, The limiting component (40) includes: A connector (403) is disposed at the end of the floating member (301) and extends along the second direction; A pressure block (401), at least a portion of which is pressed against the connector (403), is used to limit the movement stroke of the floating member (301) and forms an movable gap with the floating member (301); The fastener (402) avoids the connector (403) and passes through the pressure block (401), and fixes the pressure block (401) to the clamp (100).

8. The cell feeding device (1) according to claim 6, characterized in that, Along the first direction, the limiting component (40) does not protrude beyond the floating member (301) to abut against the outer surface of the battery cell (20).

9. The cell feeding device (1) according to any one of claims 2 to 8, characterized in that, One of the at least two clamping pins (100) in each clamping assembly (10) is a first clamping pin (101), which is used to clamp the inner ring (201) of the battery cell (20). The floating member (301) disposed on the first clamping pin (101) has a convex arc-shaped surface on the surface of the inner ring (201) of the battery cell (20).

10. The cell feeding device (1) according to claim 9, characterized in that, One of the at least two clamping pins (100) in each clamping assembly (10) is a second clamping pin (102), which is used to clamp the outer ring (202) of the battery cell (20). The floating member (301) in the floating assembly (30) of the second clamping pin (102) is a flat surface for abutting the outer ring (202) of the battery cell (20).

11. The cell feeding device (1) according to claim 10, characterized in that, The clamping assembly (10) further includes: The support member (104) has a fixed end of the first clamping pin (101) disposed on the support member (104) and the second clamping pin (102) is movably disposed on the support member (104). A drive member (105) is disposed on the support member (104) and connected to the second clamping pin (102) to drive the second clamping pin (102) to move closer to or away from the first clamping pin (101) in a first direction so that the at least two clamping pins (100) can controllably clamp the battery cell (20).

12. The cell feeding device (1) according to claim 11, characterized in that, The cell feeding device (1) further includes: Two first drive devices (50), each of the two first drive devices (50) is connected to the support (104) in the corresponding clamping assembly (10), the first drive device (50) being used to drive the clamping assembly (10) to move closer to or away from the battery cell (20) in the second direction. The second driving device (60) has two driving ends connected to the two first driving devices (50) respectively, so as to drive the two first driving devices (50) to move closer to or further away from each other along the first direction.

13. The cell feeding device (1) according to any one of claims 1 to 8, characterized in that, Each of the clamping pins (100) in each of the clamping assemblies (10) is provided with the floating assembly (30).

14. A method for cutting battery cells, characterized in that, The cell feeding method is applied to the cell feeding device as described in any one of claims 1 to 13, and the method includes: The clamping assembly is moved along the second direction, and the first clamping pin of at least two clamping pins of the clamping assembly and the floating component disposed on the first clamping pin are inserted into the feeding hole of the battery cell. The second of at least two clamping pins of the clamping assembly is moved along the first direction and abuts against the outer ring of the battery cell, so that the clamping assembly clamps the battery cell; The two clamping assemblies are moved away from each other along the first direction to open up the battery cell. When the two clamping assemblies move to the target position, the two clamping assemblies stop moving. The clamping assembly is released from the battery cell and reset along the second direction to complete the unloading of the battery cell.

15. The cell cutting method according to claim 14, characterized in that, The step of releasing the clamping assembly from the battery cell and resetting it in the second direction includes: The second clamping pin is reset along the first direction; The two clamping assemblies are brought closer to each other along a first direction so that a gap is formed between the floating assembly disposed on the first clamping pin and the inner ring of the battery cell; The clamping assembly is reset along the second direction.

16. A winding device, characterized in that, include: The cell feeding device (1) as described in any one of claims 1 to 13.

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