Waste sheet removal mechanism, winding apparatus, and battery cell

Abstract

A waste sheet removal mechanism, a winding apparatus, and a battery cell. The waste sheet removal mechanism is used for removing a waste sheet segment from an electrode sheet, the mechanism comprising: a cutter module, which is used for respectively cutting off a first electrode sheet segment and a second electrode segment at a first position of the first electrode sheet segment and at a second position of the second electrode sheet segment; a pulling module, which is used for pulling the second electrode sheet segment in a direction towards a first cut end, such that the first cut end is aligned with a second cut end; and a bonding module, which is used for bonding the first cut end and the second cut end that have been aligned with each other, thus forming a spliced electrode sheet from the first electrode sheet segment and the second electrode sheet segment.

Description

Waste film removal mechanism, winding equipment and battery cells

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on September 21, 2023, with application number 202322580811.0 and application name “Waste Sheet Removal Mechanism, Winding Equipment and Battery Cell,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to a waste sheet rejecting mechanism, a winding device and a battery cell. Background Art

[0003] In related technologies, battery cells are primarily manufactured using winding equipment. Specifically, the winding equipment includes a winding needle, which rotates to wind the electrode sheet around itself to form the battery cell. The electrode sheet typically has multiple tabs arranged along its length in a certain pattern. Ideally, when the electrode sheet is wound around the winding needle, the tabs should be aligned with each other.

[0004] During the actual production process, it is inevitable that a bad spot will appear in a certain part of the electrode sheet. The section of the electrode sheet at this bad spot is called a waste segment. To prevent the waste segment from winding around the battery cell winding needle and causing a decrease in battery cell performance, it is necessary to cut off at least the length of the electrode sheet required to make a complete battery cell, resulting in waste of electrode sheet.

[0005] Summary of the Invention

[0006] The present disclosure discloses a waste sheet rejection mechanism, a winding device and a battery cell, which can save electrodes and avoid wasting electrodes.

[0007] In order to achieve the above objectives, in a first aspect, the present disclosure discloses a waste piece removal mechanism for removing waste pieces from a pole piece, comprising:

[0008] a cutter module, the cutter module being configured to cut the first pole segment and the second pole segment at a first position of the first pole segment and a second position of the second pole segment, respectively, so that the waste segment located between the first pole segment and the second pole segment is separated from the first pole segment and the second pole segment, and the first pole segment forms a first cut end and the second pole segment forms a second cut end, wherein the first pole segment and the second pole segment are both qualified pole segments on the pole piece;

[0009] a pulling module, configured to pull the second pole segment toward the first cutout end so as to dock the first cutout end with the second cutout end;

[0010] A bonding module is used to bond the first cut end and the second cut end to each other after being connected so that the first pole segment and the second pole segment form a spliced ​​pole piece, and the spliced ​​pole piece is wound to form a battery cell.

[0011] Since the spliced ​​electrode used to make the battery cell is formed by splicing the first electrode segment and the second electrode segment, and since only the waste segments need to be cut off without having to cut off the entire electrode of at least the length required to make a complete battery cell, it can save the electrode and avoid waste of the electrode.

[0012] Optionally, the waste film rejection mechanism further includes:

[0013] A die-cutting module is used to cut the second pole segment and form a preset pole ear on the second pole segment so that when the spliced ​​pole piece is wound to form the battery cell, the existing pole ear on the first pole segment is aligned with the preset pole ear along the radial direction of the battery cell.

[0014] Since the second pole segment can be cut by the die-cutting module and a preset pole ear can be formed on the second pole segment, the arrangement rule of the preset pole ear can be adapted to the arrangement rule of the existing pole ear on the first pole segment, so that along the length direction of the pole piece, the preset pole ear and the pole ear group formed by the preset pole ear can be arranged according to a certain rule, thereby avoiding the situation where the existing pole ear and the preset pole ear are not aligned along the radial direction of the battery cell when the spliced ​​pole pieces are wound to form a battery cell. That is, when the spliced ​​pole pieces are wound to form a battery cell, multiple pole ears can be aligned along the radial direction of the battery cell, thereby improving the performance of the battery cell.

[0015] Optionally, the die-cutting module is a laser cutting machine.

[0016] Since the laser cutting machine can use laser to cut the second pole segment, laser cutting has the advantages of high efficiency and high cutting precision, thus, it can improve the cutting efficiency and cutting precision at the same time.

[0017] Optionally, the pulling module includes:

[0018] Pull the drive member;

[0019] A clamping assembly is connected to the pulling drive, the clamping assembly is used to clamp the second pole segment, and the pulling drive is used to drive the clamping assembly to pull the second pole segment toward the first cut end so that the first cut end and the second cut end are docked.

[0020] When it is necessary to achieve the purpose of docking the first cut end with the second cut end, it is only necessary to clamp the second pole segment through the clamping assembly, and then drive the clamping assembly toward the direction close to the first cut end by pulling the driving member. The implementation method is very simple and can simplify the structure of the pulling module.

[0021] In addition, since the clamping assembly can fix the second pole segment by clamping, and then can synchronously drive the second pole segment to move toward the direction close to the first incision end under the driving action of the pulling driving member, compared with the method of fixing the second pole segment by adsorption or pasting, since the second pole segment can be fixed more firmly by clamping, it can avoid the second pole segment accidentally detaching from the clamping assembly during the process of the clamping assembly synchronously driving the second pole segment to move toward the direction close to the first incision end.

[0022] Optionally, the clamping assembly includes:

[0023] a fixing member connected to the pulling drive member;

[0024] a first clamping member, wherein the first clamping member is slidably disposed on the fixing member;

[0025] a second clamping member, the second clamping member being arranged opposite to the first clamping member;

[0026] A first clamping driver is connected to the first clamping member, and is used to drive the first clamping member to slide toward the second clamping member to clamp the second pole segment between the first clamping member and the second clamping member.

[0027] Since the first clamping member is slidably arranged on the fixing member, the second clamping member is arranged opposite to the first clamping member, and the first clamping driving member is connected to the first clamping member, therefore, when the second pole segment is located between the first clamping member and the second clamping member, when the first clamping driving member drives the first clamping member to slide toward the second clamping member, the gap between the first clamping member and the second clamping member can be reduced, thereby achieving the purpose of clamping the second pole segment between the first clamping member and the second clamping member.

[0028] Optionally, the clamping assembly further comprises:

[0029] A second clamping drive member, the second clamping member is slidably disposed on the fixing member, the second clamping drive member is connected to the second clamping member, and the second clamping drive member is used to drive the second clamping member to slide toward the direction close to the first clamping member to clamp the second pole segment between the first clamping member and the second clamping member.

[0030] Since the second clamping member is slidably arranged on the fixing member and the second clamping driving member is connected to the second clamping member, when it is necessary to clamp the second pole segment, in addition to the first clamping driving member driving the first clamping member to slide in the direction close to the second clamping member to achieve the purpose of clamping the second pole segment, the second clamping driving member can also be used to drive the second clamping member to slide in the direction close to the first clamping member. Therefore, on the one hand, the gap between the second clamping member and the first clamping member can be reduced more quickly, and the second pole segment can be clamped between the second clamping member and the first clamping member more quickly, thereby making the clamping efficiency higher. On the other hand, the second pole segment can also be clamped more securely.

[0031] Optionally, the cutter module includes:

[0032] Mobile drive components;

[0033] A cutting assembly connected to the mobile drive member, the mobile drive member is used to drive the cutting assembly to the first position, the cutting assembly is used to cut off the first pole segment at the first position, the mobile drive member is also used to drive the cutting assembly to the second position, the cutting assembly is also used to cut off the second pole segment at the second position.

[0034] When it is necessary to cut the first pole segment and the second pole segment at the first position of the first pole segment and the second position of the second pole segment respectively, it can be achieved by moving the driving member to drive the cutting assembly to the first position and the second position. That is, the same cutting assembly can be used to achieve the purpose of cutting the first pole segment and the second pole segment at different positions, which can save the number of cutting assemblies and thereby reduce the cost of the cutter module.

[0035] Optionally, the bonding module includes:

[0036] a first bonding drive member;

[0037] A first abutment member is connected to the first adhesive driving member, and the first adhesive driving member is used to drive the first abutment member to drive the first adhesive tape to adhere to the first pole segment and the second pole segment respectively, so that the first cut end and the second cut end are adhered to each other.

[0038] When it is necessary to bond the first cut end and the second cut end to each other, it is only necessary to drive the first abutment member through the first bonding driving member to drive the first tape to abut the first pole segment and the second pole segment respectively, so as to achieve the purpose of bonding the first cut end and the second cut end to each other. The implementation method is very simple.

[0039] Optionally, the waste film rejection mechanism further includes:

[0040] A first fixing module, the first fixing module is used to fix the pole piece on the first side at the first position before cutting off the first pole segment, the pulling module is also used to fix the pole piece on the second side opposite to the first side at the first position to tighten the first pole segment, and the cutter module is used to cut the first pole segment at the first position when the first pole segment is tightened, wherein the first side and the second side are respectively located on both sides of the first position along the length direction of the pole piece.

[0041] Since the first fixing module can fix the pole piece at the first side of the first position before cutting off the first pole segment, and the pulling module can fix the pole piece at the second side of the first position, that is, the pulling module and the first fixing module can fix the pole piece on both sides of the first position respectively, therefore, the first pole segment can be tightened, which provides convenience for the subsequent cutting of the first pole segment at the first position by the cutter module, and can avoid the situation where the first pole segment is loose and cannot be cut when the first pole segment is cut at the first position by the cutter module.

[0042] Optionally, the waste film rejection mechanism further includes:

[0043] A second fixing module is located between the pulling module and the first position, and is used for fixing an end of the waste segment facing the first segment after the cutter module cuts off the first segment.

[0044] Since the second fixing module is located between the pulling module and the first position, after the cutter module cuts off the first pole segment, the end of the waste segment facing the first pole segment can be fixed by the second fixing module. In this way, the end of the waste segment facing the first pole segment can be prevented from becoming a free end and drooping down.

[0045] Optionally, the waste film rejection mechanism further includes:

[0046] The waste film winding needle, the pulling module is also used to avoid the waste film winding needle, the waste film winding needle is used to extend and clamp the waste segment, the second fixing module is also used to release the end of the waste segment facing the first pole segment after the waste film winding needle clamps the waste segment, and the waste film winding needle is also used to roll the waste segment onto itself.

[0047] When waste fragments need to be recovered, first, the pulling module can be moved away from the waste fragments to avoid the waste film winding needle. Then, the waste film winding needle can be extended toward the waste fragments and clamp the waste fragments. In this way, interference between the waste film winding needle and the pulling module can be avoided.

[0048] After the waste film rolling needle clamps the waste segment, the second fixing module can be made to loosen the end of the waste segment facing the first pole segment, so that the waste film rolling needle can roll up the waste segment onto itself when it rotates, thereby avoiding the situation where the end of the waste segment facing the first pole segment is fixed by the second fixing module, causing the waste film rolling needle to be unable to roll up the waste segment onto itself.

[0049] Optionally, the pulling module is also used to fix the second pole segment to tighten the second pole segment together with the waste film rolling needle, the cutter module is used to cut the second pole segment at the second position after the second pole segment is tightened, and the waste film rolling needle is used to roll the waste segment into itself after the cutter module cuts the second pole segment.

[0050] Since the pulling module can fix the second pole segment, when the waste film winding needle clamps the waste segment, the two sides at the second position will be fixed by the pulling module and the waste film winding needle respectively, so that the pulling module and the waste film winding needle can jointly tighten the second pole segment, thereby facilitating the cutting of the second pole segment at the second position of the second pole segment by the cutting module, and avoiding the situation where the second pole segment is loose and the cutting module cannot cut the second pole segment.

[0051] Optionally, the waste film rejection mechanism further includes:

[0052] A waste piece detection module, the waste piece detection module is used to detect whether there are waste pieces on the electrode;

[0053] A length detection module is electrically connected to the waste piece detection module, and is used to confirm the length of the waste piece when the waste piece exists on the electrode piece, so as to determine the first position and the second position respectively.

[0054] Since the length detection module is electrically connected to the waste piece detection module, when the waste piece detection module detects that there is no waste segment on the electrode piece, the length detection module may not work. When the waste piece detection module detects that there is a waste segment on the electrode piece, the length detection module can detect the length of the waste segment, and then can confirm the first position and the second position according to the length of the waste segment, which provides convenience for subsequently cutting off the first electrode segment and the second electrode segment at the first position of the first electrode segment and the second position of the second electrode segment respectively through the cutter module.

[0055] Optionally, the waste film rejection mechanism further includes:

[0056] The die-cutting quality detection module is at least used to detect whether the cutting quality of the preset tab is qualified.

[0057] By setting up a die-cutting quality detection module, the cutting quality of the preset pole ears can be detected in real time, thereby avoiding the situation where the preset pole ears with unqualified cutting quality are manufactured into battery cells, resulting in poor battery performance.

[0058] In a second aspect, the present disclosure discloses a winding device, comprising:

[0059] Unwinding module;

[0060] A cell winding needle, the cell winding needle is located downstream of the unwinding module, and the unwinding module is used to transfer the electrode to the cell winding needle;

[0061] The waste sheet removal mechanism described in any one of the above-mentioned first aspects is located between the unwinding module and the battery cell winding needle and on the transmission path of the electrode piece. The end of the first electrode segment away from the second electrode segment is wound on the battery cell winding needle. The battery cell winding needle is used to wind the spliced ​​electrode piece on itself to form the battery cell after the die-cutting module cuts the second electrode piece to form the preset electrode ear.

[0062] Since the waste sheet rejection mechanism can save electrode sheets, when the winding device includes the waste sheet rejection mechanism, the electrode sheets can be saved when the battery cells are manufactured by the winding device.

[0063] In a third aspect, the present disclosure discloses a battery cell, which is made by the winding equipment described in the second aspect.

[0064] Since the battery cell is manufactured by the above-mentioned winding device, pole pieces can be saved when the battery cell is manufactured by the above-mentioned winding device, thereby avoiding waste of pole pieces.

[0065] Compared with the prior art, the present invention has the following advantages:

[0066] In the present disclosure, after the waste segment is cut off from between the first pole segment and the second pole segment, the second pole segment is pulled toward the first cut end by the pulling module, so that the first cut end and the second cut end are docked, and then, the docked first cut end and the second cut end are bonded to each other by the bonding module. The formed spliced ​​pole piece can be wound to form a battery cell. With such an arrangement, the spliced ​​pole piece used to make the battery cell can be formed by splicing the first pole segment and the second pole segment, and it is only necessary to cut off the waste segment without having to cut off the pole piece of at least the length required to make a complete battery cell as a whole. Therefore, it can save pole pieces and avoid waste of pole pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0068] FIG1 is a schematic structural diagram of a waste film removal mechanism provided by an embodiment of the present disclosure;

[0069] FIG2 is a schematic structural diagram of the waste piece removal mechanism in FIG1 after the waste piece is separated from the first pole piece and the second pole piece (the cutter module is omitted);

[0070] FIG3 is a schematic structural diagram of the first cut end and the second cut end of the waste film removal mechanism in FIG2 after being connected;

[0071] FIG4 is a top view of the second pole segment in FIG3 ;

[0072] FIG5 is a schematic structural diagram of a battery cell provided by an embodiment of the present disclosure;

[0073] FIG6 is a schematic structural diagram of the pulling module in FIG2 ;

[0074] FIG7 is a schematic structural diagram of the clamping assembly in FIG6 ;

[0075] FIG8 is a schematic structural diagram of the cutter module in FIG1 ;

[0076] FIG9 is a schematic structural diagram of another waste film removal mechanism provided by an embodiment of the present disclosure;

[0077] FIG10 is a schematic structural diagram of another waste film removal mechanism provided in an embodiment of the present disclosure;

[0078] FIG11 is a schematic structural diagram of another waste film removal mechanism provided in an embodiment of the present disclosure;

[0079] FIG12 is a schematic structural diagram of another waste film removal mechanism provided in an embodiment of the present disclosure;

[0080] FIG13 is a schematic structural diagram of a winding device provided in an embodiment of the present disclosure.

[0081] Description of main reference numerals

[0082] 1-cutter module; 11-moving drive member; 12-cutting assembly;

[0083] 2- pulling module; 21- pulling drive member; 22- clamping assembly; 221- fixing member; 222- first clamping member; 223- second clamping member; 224- first clamping drive member; 225- second clamping drive member;

[0084] 3-bonding module; 31-first bonding drive member; 32-first abutting member; 33-second bonding drive member; 34-second abutting member;

[0085] 4-die-cutting module;

[0086] 5-first fixing module;

[0087] 6- second fixed module;

[0088] 7-waste film rolling needle;

[0089] 8-waste detection module; 9-length detection module; 9a-die-cutting quality detection module;

[0090] 100-unwinding module; 200-cell winding needle; 300-waste film removal mechanism; 1000-winding equipment;

[0091] A-pole piece; A1-waste segment; A2-first pole segment; A21-first position; A22-first cut end; A23-existing pole tab; A3-second pole segment; A31-second position; A32-second cut end; A33-preset pole tab; B1-first tape; D-battery cell. DETAILED DESCRIPTION

[0092] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0093] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this disclosure and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0094] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to express a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0095] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0096] Furthermore, the terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0097] The technical solution of the present disclosure will be further described below with reference to specific embodiments and drawings.

[0098] 1, 2, and 3, the waste sheet rejection mechanism 300 includes a cutter module 1, a pulling module 2, a bonding module 3, and a die-cutting module 4. The cutter module 1 is configured to cut the first electrode segment A2 and the second electrode segment A3 at a first position A21 and a second position A31 of the first electrode segment A2 and the second electrode segment A3, respectively, to separate the waste segment A1 located between the first electrode segment A2 and the second electrode segment A3 from the first electrode segment A2 and the second electrode segment A3, and to form a first cut end A22 on the first electrode segment A2 and a second cut end A32 on the second electrode segment A3. The first electrode segment A2 and the second electrode segment A3 are both qualified electrode segments on the electrode sheet A.

[0099] The pulling module 2 is used to pull the second pole segment A3 toward the direction close to the first cut end A22 (the positive direction of the X-axis in Figure 2) so that the first cut end A22 and the second cut end A32 are docked (the state in Figure 3), and the bonding module 3 is used to bond the docked first cut end A22 and the second cut end A32 to each other so that the first pole segment A2 and the second pole segment A3 form a spliced ​​pole piece, which is wound to form a battery cell D.

[0100] In this embodiment, when the waste segment A1 on the electrode A needs to be removed, first, since the waste segment A1 is located between the first electrode segment A2 and the second electrode segment A3 along the length direction of the electrode (the X-axis direction in FIG1 ), the first electrode segment A2 and the second electrode segment A3 can be cut by the cutter module 1 at the first position A21 of the first electrode segment A2 and the second position A31 of the second electrode segment A3, respectively, so that the waste segment A1 is separated from the first electrode segment A2 and the second electrode segment A3, and the first electrode segment A2 forms a first cut end A22, and the second electrode segment A3 forms a second cut end A32. Then, The second pole segment A3 can be pulled toward the first cutout end A22 by the pulling module 2. Under the pulling action of the pulling module 2, the second cutout end A32 will gradually approach the first cutout end A22 until the first cutout end A22 and the second cutout end A32 are docked. After the first cutout end A22 and the second cutout end A32 are docked, the docked first cutout end A22 and the second cutout end A32 can be bonded to each other by the bonding module 3, so that the first pole segment A2 and the second pole segment A3 form a spliced ​​pole piece and are re-formed into a whole. Finally, the spliced ​​pole piece can be wound to form a battery cell D.

[0101] It can be seen that after the waste segment A1 is cut off from between the first pole segment A2 and the second pole segment A3, the second pole segment A3 is pulled toward the first cut end A22 by pulling the module 2, so that the first cut end A22 and the second cut end A32 are docked, and then the docked first cut end A22 and the second cut end A32 are bonded to each other by the bonding module 3. The formed spliced ​​pole piece can be wound to form a battery cell D. With such an arrangement, the spliced ​​pole piece used to make the battery cell D can be formed by splicing the first pole segment A2 and the second pole segment A3. Moreover, it is only necessary to cut off the waste segment A1 without cutting off the pole piece A of the length required to make a complete battery cell. Therefore, it can save the pole piece A and avoid waste of the pole piece A.

[0102] In order to avoid the situation where multiple pole tabs are misaligned along the radial direction of the battery cell D when the spliced ​​pole sheets are wound to form the battery cell D, in some embodiments, referring to Figures 4 and 5, the waste sheet removal mechanism also includes: a die-cutting module 4, the die-cutting module 4 is used to cut the second pole segment A3 and form a preset pole tab A33 on the second pole segment A3, so that the existing pole tab A23 on the first pole segment A2 is aligned with the preset pole tab A33 along the radial direction of the battery cell D (Y-axis direction in Figure 5) when the spliced ​​pole sheets are wound to form the battery cell D.

[0103] Since the second pole segment A3 can be cut by the die-cutting module 4 and a preset pole ear A33 can be formed on the second pole segment A3, the arrangement rule of the preset pole ear A33 can be adapted to the arrangement rule of the existing pole ear A23 on the first pole segment A2, so that along the length direction of the pole piece A, the preset pole ear A33 and the pole ear group formed by the preset pole ear A33 are arranged according to a certain rule, thereby avoiding the situation where the existing pole ear A23 and the preset pole ear A33 are not aligned along the radial direction of the battery cell D when the spliced ​​pole pieces are wound to form the battery cell D. That is, when the spliced ​​pole pieces are wound to form the battery cell D, multiple pole ears can be aligned along the radial direction of the battery cell D, thereby improving the performance of the battery cell D.

[0104] It can be seen that in this embodiment, although the arrangement pattern of the pole ears on the pole piece A will be destroyed after the waste segment A1 is cut from the first pole segment A2 and the second pole segment A3, since the preset pole ear A33 can be cut out on the second pole segment A3 by the die-cutting module 4, and the preset pole ear A33 can be adapted to the arrangement pattern of the existing pole ear A23 on the first pole segment A2, the preset pole ear A33 and the existing pole ear A23 can still be arranged according to a certain pattern. Therefore, when the spliced ​​pole pieces are wound to form the battery cell D, the existing pole ear A23 and the preset pole ear A33 can be aligned along the radial direction of the battery cell D, that is, multiple pole ears are aligned along the radial direction of the battery cell D, which can make the performance of the battery cell D better.

[0105] Among them, the above-mentioned preset pole tab A33 and the existing pole tab A23 are arranged according to a certain rule, which means that when the spliced ​​pole sheets are wound to form the battery cell D, the existing pole tab A23 and the preset pole tab A33 are exactly aligned along the radial direction of the battery cell D.

[0106] It should be noted that the radial alignment of the above-mentioned existing pole tab A23 and the preset pole tab A33 along the battery cell D can be understood in a broad sense, that is, the existing pole tab A23 and the preset pole tab A33 are roughly aligned along the radial direction of the battery cell D, or the misalignment is within a certain range, which can be understood as the radial alignment of the existing pole tab A23 and the preset pole tab A33 along the battery cell D. This embodiment does not make a narrow limitation on this.

[0107] It should be noted that the timing when the die-cutting module 4 cuts the second pole segment A3 to form the preset pole ear A33 on the second pole segment A3 can be determined according to actual needs. In some embodiments, the cutting can be performed when the pulling module 2 pulls the second pole segment A3 toward the first incision end A22. Of course, the second pole segment A3 can also be cut at other times. For example, in other embodiments, the cutting can be performed after the first incision end A22 and the second incision end A32 are bonded to each other. This embodiment does not limit the cutting timing.

[0108] To improve the efficiency of cutting the second pole segment A3 to form the preset pole tab A33 on the second pole segment A3, in some embodiments, the die-cutting module 4 is a laser cutting machine. Since the laser cutting machine can use lasers to cut the second pole segment A3, laser cutting has the advantages of high efficiency and high cutting precision. Therefore, it can improve cutting efficiency and cutting precision.

[0109] In some embodiments, referring to Figures 2 and 6 , the pulling module 2 includes a pulling driver 21 and a clamping assembly 22. The clamping assembly 22 is connected to the pulling driver 21 and is configured to clamp the second pole segment A3. The pulling driver 21 is configured to drive the clamping assembly 22 to pull the second pole segment A3 toward the first notch end A22 (the positive direction of the X-axis in Figure 1 ) so that the first notch end A22 and the second notch end A32 are aligned.

[0110] Since the clamping assembly 22 is connected to the pulling drive member 21, when it is necessary to dock the first incision end A22 with the second incision end A32, first, the pulling drive member 21 can drive the clamping assembly 22 to move to the second pole segment A3, so that the clamping assembly 22 can clamp the second pole segment A3. After the clamping assembly 22 clamps the second pole segment A3, the pulling drive member 21 can drive the clamping assembly 22 to move toward the direction close to the first incision end A22. When the clamping assembly 22 moves toward the direction close to the first incision end A22, the purpose of synchronously driving the second incision end A32 to move toward the direction close to the first incision end A22 can be achieved, and then the purpose of docking the first incision end A22 with the second incision end A32 can be achieved.

[0111] It can be seen that when the purpose of docking the first incision end A22 with the second incision end A32 is required, it is only necessary to clamp the second pole segment A3 through the clamping assembly 22, and then drive the clamping assembly 22 toward the direction close to the first incision end A22 by pulling the driving member 21. The implementation method is very simple and can simplify the structure of the pulling module 2.

[0112] In addition, since the clamping assembly 22 can fix the second pole segment A3 by clamping, and then can synchronously drive the second pole segment A3 to move toward the direction close to the first incision end A22 under the driving action of the pulling driving member 21, compared with the method of fixing the second pole segment A3 by adsorption or pasting, since the second pole segment A3 can be fixed more firmly by clamping, it can be avoided that the second pole segment A3 accidentally detaches from the clamping assembly 22 during the process of the clamping assembly 22 synchronously driving the second pole segment A3 to move toward the direction close to the first incision end A22.

[0113] The pulling drive 21 may be a cylinder, a robot, or any device or structure capable of driving the clamping assembly 22 to pull the second pole segment A3 toward the first cut end A22 . This embodiment does not limit the pulling drive 21 .

[0114] In some embodiments, referring to Figure 7, the clamping assembly 22 includes: a fixing member 221, a first clamping member 222, a second clamping member 223 and a first clamping drive member 224, wherein the fixing member 221 is connected to the pulling drive member 21, the first clamping member 222 is slidably arranged on the fixing member 221, the second clamping member 223 is arranged opposite to the first clamping member 222, the first clamping drive member 224 is connected to the first clamping member 222, and the first clamping drive member 224 is used to drive the first clamping member 222 to slide toward the direction close to the second clamping member 223, so as to clamp the second pole segment A3 between the first clamping member 222 and the second clamping member 223.

[0115] Since the first clamping member 222 is slidably arranged on the fixing member 221, the second clamping member 223 is arranged opposite to the first clamping member 222, and the first clamping driving member 224 is connected to the first clamping member 222, therefore, when the second pole segment A3 is located between the first clamping member 222 and the second clamping member 223, when the first clamping driving member 224 drives the first clamping member 222 to slide toward the second clamping member 223, the gap between the first clamping member 222 and the second clamping member 223 can be made smaller, thereby achieving the purpose of clamping the second pole segment A3 between the first clamping member 222 and the second clamping member 223.

[0116] The shape of the fixing member 221 may be plate-shaped, and this embodiment does not limit the shape of the fixing member 221 .

[0117] The shape of the above-mentioned first clamping member 222 and the second clamping member 223 can also be plate-shaped. When the shape of the first clamping member 222 and the second clamping member 223 is plate-shaped, the contact area between the first clamping member 222 and the second clamping member 223 and the second pole segment A3 can be larger, thereby making the second pole segment A3 more stably clamped between the first clamping member 222 and the second clamping member 223.

[0118] Of course, the shapes of the first clamping member 222 and the second clamping member 223 can be other possible shapes, which is not limited in this embodiment.

[0119] The first clamping member 222 may be slidably disposed on the fixing member 221 via a slide rail assembly, or may be slidably disposed on the fixing member 221 via other methods, which is not limited in this embodiment.

[0120] The first clamping driving member 224 may be any device such as a pneumatic cylinder or an electric cylinder that can drive the first clamping member 222 to slide toward the second clamping member 223 . This embodiment does not limit the first clamping driving member 224 .

[0121] In order to make the clamping efficiency of the clamping assembly 22 higher and to enable the clamping assembly 22 to clamp the second pole segment A3 more firmly, in some embodiments, see Figure 7, the clamping assembly 22 also includes: a second clamping drive 225, the second clamping member 223 is slidably arranged on the fixing member 221, the second clamping drive 225 is connected to the second clamping member 223, and the second clamping drive 225 is used to drive the second clamping member 223 to slide in the direction close to the first clamping member 222, so as to clamp the second pole segment A3 between the first clamping member 222 and the second clamping member 223.

[0122] Since the second clamping member 223 is slidably arranged on the fixing member 221 and the second clamping driving member 225 is connected to the second clamping member 223, when it is necessary to clamp the second pole segment A3, in addition to using the first clamping driving member 224 to drive the first clamping member 222 to slide toward the second clamping member 223 to achieve the purpose of clamping the second pole segment A3, the second clamping driving member 225 can also be used to drive the second clamping member 223 to slide toward the first clamping member 222. Therefore, on the one hand, the gap between the second clamping member 223 and the first clamping member 222 can be reduced more quickly, and the second pole segment A3 can be clamped between the second clamping member 223 and the first clamping member 222 more quickly, thereby making the clamping efficiency higher. On the other hand, the second pole segment A3 can also be clamped more securely.

[0123] The second clamping member 223 can be slidably mounted on the fixing member 221 in a manner similar to the manner in which the first clamping member 222 can be slidably mounted on the fixing member 221, and this embodiment will not be described in detail here. The structure of the second clamping driver 225 can also be similar to the structure of the first clamping driver 224, and this embodiment will not be described in detail here either.

[0124] In order to achieve cutting of the first pole segment A2 and the second pole segment A3 at the first position A21 of the first pole segment A2 and the second position A31 of the second pole segment A3, respectively, in some embodiments, referring to Figures 1 and 8, the cutter module 1 includes: a movable drive 11 and a cutting assembly 12, wherein the cutting assembly 12 is connected to the movable drive 11, the movable drive 11 is used to drive the cutting assembly 12 to move to the first position A21, and the cutting assembly 12 is used to cut off the first pole segment A2 at the first position A21, the movable drive 11 is also used to drive the cutting assembly 12 to move to the second position A31, and the cutting assembly 12 is also used to cut off the second pole segment A3 at the second position A31.

[0125] In this embodiment, since the cutting assembly 12 is connected to the mobile drive member 11, when it is necessary to cut the first pole segment A2 at the first position A21, the mobile drive member 11 can drive the cutting assembly 12 to move to the first position A21. After the cutting assembly 12 reaches the first position A21, the cutting assembly 12 can cut the first pole segment A2 at the first position A21. When it is necessary to cut the second pole segment A3 at the second position A31, the mobile drive member 11 can drive the cutting assembly 12 from the first position A21 to the second position A31. After the cutting assembly 12 reaches the second position A31, the cutting assembly 12 can cut the second pole segment A3 at the second position A31.

[0126] It can be seen that when it is necessary to cut the first pole segment A2 and the second pole segment A3 at the first position A21 of the first pole segment A2 and the second position A31 of the second pole segment A3 respectively, it can be achieved by moving the driving member 11 to drive the cutting assembly 12 to the first position A21 and the second position A31. That is, the same cutting assembly 12 can be used to cut off the first pole segment A2 and the second pole segment A3 at different positions, which can save the number of cutting assemblies 12 and thereby reduce the cost of the cutter module 1.

[0127] Of course, two cutting assemblies 12 may also be provided to cut the first pole segment A2 and the second pole segment A3 at the first position A21 of the first pole segment A2 and the second position A31 of the second pole segment A3 respectively. This embodiment does not limit the cutter module 1.

[0128] The movable driving member 11 may be any device such as a cylinder, an electric cylinder or a manipulator that can drive the cutting assembly 12 to move between the first position A21 and the second position A31. This embodiment does not limit the movable driving member 11.

[0129] In some embodiments, referring to FIG3 , the bonding module 3 includes a first bonding driver 31 and a first abutting member 32. The first abutting member 32 is connected to the first bonding driver 31. The first bonding driver 31 is configured to drive the first abutting member 32 to cause the first adhesive tape B1 to adhere to the first pole segment A2 and the second pole segment A3, respectively, so that the first cut end A22 and the second cut end A32 are bonded to each other.

[0130] Since the first abutment member 32 is connected to the first bonding drive member 31, when it is necessary to bond the first cut end A22 and the second cut end A32 to each other, the first bonding drive member 31 can drive the first abutment member 32 to move toward the direction close to the joint between the first pole segment A2 and the second pole segment A3 (the negative direction of the Z axis in Figure 3), thereby driving the first adhesive tape B1 to move toward the direction close to the joint between the first pole segment A2 and the second pole segment A3 until the first adhesive tape B1 abuts against the first pole segment A2 and the second pole segment A3 respectively. When the first adhesive tape B1 abuts against the first pole segment A2 and the second pole segment A3 respectively, the purpose of bonding the first adhesive tape B1 to the first pole segment A2 and the second pole segment A3 respectively can be achieved, and the purpose of bonding the first cut end A22 and the second cut end A32 to each other can be achieved.

[0131] It can be seen that when it is necessary to achieve the purpose of bonding the first incision end A22 and the second incision end A32 to each other, it is only necessary to drive the first abutment member 32 through the first bonding driving member 31 to drive the first adhesive tape B1 to abut against the first pole segment A2 and the second pole segment A3 respectively, so as to achieve the purpose of bonding the first incision end A22 and the second incision end A32 to each other, and the implementation method is very simple.

[0132] The first bonding driver 31 may be a pneumatic cylinder or an electric cylinder, etc., and this embodiment does not limit the first bonding driver 31 .

[0133] The shape of the first abutting member 32 may be plate-shaped or disc-shaped, etc., and this embodiment does not limit the shape of the first abutting member 32 .

[0134] In order to make the first incision end A22 and the second incision end A32 bonded to each other more firmly, in some embodiments, see Figure 9, the bonding module 3 also includes: a second bonding drive member 33 and a second abutment member 34, the second abutment member 34 is located on both sides of the pole piece A along the thickness direction of the pole piece A (Z-axis direction in Figure 3) and the first abutment member 32, and the second bonding drive member 33 is used to drive the second abutment member 34 to drive the second tape to bond to the first pole segment A2 and the second pole segment A3 respectively, so that the first incision end A22 and the second incision end A32 are bonded to each other.

[0135] By setting a second adhesive driving member 33 and a second abutment member 34, a second adhesive tape can be adhered to the other side of the first pole segment A2 and the second pole segment A3 along the thickness direction, that is, double-sided adhesive can be used, so that the first cut end A22 and the second cut end A32 can be more firmly adhered to each other.

[0136] In some embodiments, referring to FIG10 , the waste film removal mechanism further includes: a first fixing module 5, the first fixing module 5 is used to fix the pole piece A on the first side (the right side in FIG10 ) at the first position A21 before cutting off the first pole piece A2, the pulling module 2 is also used to fix the pole piece A on the second side (the right left side in FIG10 ) opposite to the first side at the first position A21 to tighten the first pole piece A2, and the cutting module 1 is used to cut off the first pole piece A2 at the first position A21 when the first pole piece A2 is tightened, wherein the first side and the second side are respectively located on both sides of the first position A21 along the length direction of the pole piece A (the X-axis direction in FIG10 ).

[0137] Since the first fixing module 5 can fix the pole piece A on the first side at the first position A21 before cutting off the first pole segment A2, the pulling module 2 can fix the pole piece A on the second side at the first position A21, that is, the pulling module 2 and the first fixing module 5 can respectively fix the pole piece A on both sides of the first position A21. Therefore, the first pole segment A2 can be tightened, which provides convenience for the subsequent cutting of the first pole segment A2 at the first position A21 by the cutter module 1, and can avoid the situation where the first pole segment A2 is loose and cannot be cut when the first pole segment A2 is cut off at the first position A21 by the cutter module 1.

[0138] The structure of the first fixing module 5 may be the same as or similar to the structure of the clamping assembly 22 . For details, reference may be made to the description of the clamping assembly 22 in the above embodiment, which will not be repeated in this embodiment.

[0139] In some embodiments, referring to FIG. 10 , the waste piece rejecting mechanism further includes: a second fixing module 6 , which is located between the pulling module 2 and the first position A21 , and is used to fix the end of the waste piece A1 facing the first pole piece A2 .

[0140] Since the second fixing module 6 is located between the pulling module 2 and the first position A21, the end of the waste segment A1 facing the first pole segment A2 can be fixed by the second fixing module 6. In this way, when the cutter module 1 cuts the first pole segment A2, the end of the waste segment A1 facing the first pole segment A2 can be prevented from becoming a free end and drooping.

[0141] The structure of the second fixing module 6 may be the same as or similar to that of the clamping assembly 22 . For details, please refer to the description of the clamping assembly 22 in the above embodiment, which will not be repeated in this embodiment.

[0142] In order to recycle the waste segment A1, in some embodiments, see Figure 10, the waste segment removal mechanism also includes: a waste segment winding needle 7, the pulling module 2 is also used to avoid the waste segment winding needle 7, the waste segment winding needle 7 is used to extend and clamp the waste segment A1, the second fixing module 6 is also used to release the end of the waste segment A1 facing the first pole segment A2 after the waste segment winding needle 7 clamps the waste segment A1, and the waste segment winding needle 7 is also used to reel the waste segment A1 into itself.

[0143] In this embodiment, when the waste segment A1 needs to be recovered, first, the pulling module 2 can be moved away from the waste segment A1 to avoid the waste segment winding needle 7. Then, the waste segment winding needle 7 can be extended toward the direction close to the waste segment A1 and clamp the waste segment A1. In this way, interference between the waste segment winding needle 7 and the pulling module 2 can be avoided.

[0144] After the waste film winding needle 7 clamps the waste segment A1, the second fixing module 6 loosens the end of the waste segment A1 facing the first pole segment A2, so that the waste film winding needle 7 can roll up the waste segment A1 onto itself when it rotates, thereby avoiding the situation where the end of the waste segment A1 facing the first pole segment A2 is fixed by the second fixing module 6, resulting in the waste film winding needle 7 being unable to roll up the waste segment A1 onto itself.

[0145] In some embodiments, referring to FIG11 , the pulling module 2 is also used to fix the second pole segment A3 so as to tighten the second pole segment A3 together with the waste film rolling needle 7, the cutting module 1 is used to cut off the second pole segment A3 at the second position A31 after the second pole segment A3 is tightened, and the waste film rolling needle 7 is used to roll up the waste segment A1 onto itself after the cutting module 1 cuts off the second pole segment A3.

[0146] Since the pulling module 2 can fix the second pole segment A3, when the waste film winding needle 7 clamps the waste segment A1, the two sides of the second position A31 will be fixed by the pulling module 2 and the waste film winding needle 7 respectively, so that the pulling module 2 and the waste film winding needle 7 can jointly tighten the second pole segment A3, thereby facilitating the cutting of the second pole segment A3 at the second position A31 of the second pole segment A3 by the cutting module 1, and avoiding the situation where the second pole segment A3 is loose and the cutting module 1 cannot cut the second pole segment A3.

[0147] It is worth noting that after the waste film rolling needle 7 rolls up the waste segment A1 on itself, it can retract in the direction opposite to the extension direction to avoid interference with the waste film rolling needle 7 when the subsequent pulling module 2 pulls the second pole segment A3 toward the first incision end A22.

[0148] The above-mentioned cutter module 1 may include a cutter and a cutter driving member, which is connected to the cutter. The cutter driving member can drive the cutter to press against the first position A21 and the second position A31 respectively, so as to achieve the purpose of cutting off the first pole segment A2 and the second pole segment A3 at the first position A21 of the first pole segment A2 and the second position A31 of the second pole segment A3 respectively.

[0149] The cutter driving member may be a pneumatic cylinder or an electric cylinder, etc., and this embodiment does not limit the cutter driving member.

[0150] In some embodiments, referring to FIG12 , the waste sheet rejection mechanism further includes: a waste sheet detection module 8 and a length detection module 9, wherein the waste sheet detection module 8 is used to detect whether there is a waste segment A1 on the electrode A, and the length detection module 9 is electrically connected to the waste sheet detection module 8. The length detection module 9 is used to confirm the length of the waste segment A1 when there is a waste segment A1 on the electrode A, so as to determine the first position A21 and the second position A31 respectively.

[0151] Since the length detection module 9 is electrically connected to the waste piece detection module 8, when the waste piece detection module 8 detects that there is no waste segment A1 on the electrode A, the length detection module 9 may not work. When the waste piece detection module 8 detects that there is a waste segment A1 on the electrode A, the length detection module 9 can detect the length of the waste segment A1, and then can confirm the first position A21 and the second position A31 according to the length of the waste segment A1, which provides convenience for the subsequent cutting of the first electrode segment A2 and the second electrode segment A3 at the first position A21 of the first electrode segment A2 and the second position A31 of the second electrode segment A3 by the cutter module 1 respectively.

[0152] The length detection module 9 may be a CCD (Charge Coupled Device) camera. When the length detection module 9 is a CCD camera, the length of the waste segment A1 may be calculated by image processing.

[0153] Of course, the length detection module 9 may also be other possible components. For example, the length detection module 9 may also be a length encoder, etc. This embodiment does not limit the length detection module 9.

[0154] The waste piece detection module 8 may also be a CCD camera or other possible sensors, as long as it can detect whether there is a waste piece A1 on the electrode A. This embodiment does not limit the waste piece detection module 8.

[0155] In order to detect the cutting quality of the preset tab A33, referring to FIG12, in some embodiments, the waste sheet rejection mechanism further includes: a die-cutting quality detection module 9a, which is at least used to detect whether the cutting quality of the preset tab A33 is qualified.

[0156] By setting up the die-cutting quality detection module 9a, the cutting quality of the preset tab A33 can be detected in real time, thereby avoiding the situation where the preset tab A33 with unqualified cutting quality is manufactured into a battery cell, resulting in poor battery performance.

[0157] Of course, the die-cutting quality detection module 9a can also be used to detect whether the cutting quality of the existing tab A23 is qualified. This embodiment does not limit the detection object of the die-cutting quality detection module 9a.

[0158] This embodiment provides a winding device 1000, see Figure 13, including: an unwinding module 100, a battery cell winding needle 200 and a waste sheet removal mechanism 300, wherein the battery cell winding needle 200 is located downstream of the unwinding module 100, the unwinding module 100 is used to convey the electrode A to the battery cell winding needle 200, the waste sheet removal mechanism 300 is located between the unwinding module 100 and the battery cell winding needle 200 and is located on the transmission path of the electrode A, the end of the first electrode segment A2 away from the second electrode segment A3 (the right end in Figure 13) is wound on the battery cell winding needle 200, and the battery cell winding needle 200 is used to wind the spliced ​​electrode sheets around itself to form a battery cell D.

[0159] Among them, the structure of the waste film removal mechanism 300 can be the same as the structure of any waste film removal mechanism 300 in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the waste film removal mechanism 300 in the above embodiments, and this embodiment will not be repeated here.

[0160] In this embodiment, since the waste sheet removal mechanism 300 plays a role in saving the electrode sheets A, when the winding device 1000 includes the waste sheet removal mechanism 300 , the electrode sheets A can be saved when the battery cells D are manufactured by the winding device 1000 .

[0161] This embodiment provides a battery cell D. Referring to FIG. 6 , the battery cell D is manufactured by the above-mentioned winding device.

[0162] Since the battery cell D is manufactured by the above-mentioned winding device, the electrode sheet A can be saved when the battery cell D is manufactured by the above-mentioned winding device 1000, thereby avoiding waste of the electrode sheet A.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 disclosure.

Claims

1. A waste film removal mechanism, wherein: Used to remove the waste fragments (A1) on the pole piece (A), including: A cutter module (1), the cutter module (1) being used to cut the first pole segment (A2) and the second pole segment (A3) at a first position (A21) of the first pole segment (A2) and a second position (A31) of the second pole segment (A3), respectively, so that the waste segment (A1) located between the first pole segment (A2) and the second pole segment (A3) is separated from the first pole segment (A2) and the second pole segment (A3), and the first pole segment (A2) forms a first cut end (A22) and the second pole segment (A3) forms a second cut end (A32), wherein the first pole segment (A2) and the second pole segment (A3) are both qualified pole segments on the pole piece (A); A pulling module (2), the pulling module (2) being used to pull the second pole segment (A3) towards the direction close to the first cut end (A22), so that the first cut end (A22) and the second cut end (A32) are butted against each other; A bonding module (3) is used to bond the first cut end (A22) and the second cut end (A32) after docking to each other so that the first pole segment (A2) and the second pole segment (A3) form a spliced ​​pole piece, and the spliced ​​pole piece is wound to form a battery cell (D).

2. The waste film removal mechanism according to claim 1, wherein: The waste film removal mechanism also includes: A die-cutting module (4), the die-cutting module (4) being used to cut the second pole segment (A3) and form a preset pole ear (A33) on the second pole segment (A3), so that when the spliced ​​pole pieces are wound to form the battery cell (D), the existing pole ear (A23) on the first pole segment (A2) is aligned with the preset pole ear (A33) along the radial direction of the battery cell (D).

3. The waste film removal mechanism according to claim 2, wherein: The die-cutting module (4) is a laser cutting machine.

4. The waste film removal mechanism according to any one of claims 1 to 3, wherein: The pulling module (2) comprises: Pulling the driving member (21); A clamping assembly (22), the clamping assembly (22) being connected to the pulling drive (21), the clamping assembly (22) being used for clamping the second pole segment (A3), the pulling drive (21) being used for driving the clamping assembly (22) to pull the second pole segment (A3) in a direction close to the first cut end (A22), so that the first cut end (A22) and the second cut end (A32) are butted against each other.

5. The waste film removal mechanism according to claim 4, wherein: The clamping assembly (22) comprises: A fixing member (221), wherein the fixing member (221) is connected to the pulling driving member (21); A first clamping member (222), wherein the first clamping member (222) is slidably disposed on the fixing member (221); a second clamping member (223), the second clamping member (223) being arranged opposite to the first clamping member (222); A first clamping driving member (224), the first clamping driving member (224) is connected to the first clamping member (222), and the first clamping driving member (224) is used to drive the first clamping member (222) to slide in a direction close to the second clamping member (223) so as to clamp the second pole segment (A3) between the first clamping member (222) and the second clamping member (223).

6. The waste film removal mechanism according to claim 5, wherein: The clamping assembly (22) further comprises: A second clamping driving member (225), wherein the second clamping member (223) is slidably disposed on the fixing member (221), and the second clamping driving member (225) is connected to the second clamping member (223), and the second clamping driving member (225) is used to drive the second clamping member (223) to slide in a direction close to the first clamping member (222) so as to clamp the second pole segment (A3) between the first clamping member (222) and the second clamping member (223).

7. The waste film removal mechanism according to any one of claims 1 to 6, wherein: The cutter module (1) comprises: A mobile driving member (11); A cutting assembly (12), wherein the cutting assembly (12) is connected to the movable driving member (11), wherein the movable driving member (11) is used to drive the cutting assembly (12) to move to the first position (A21), wherein the cutting assembly (12) is used to cut off the first pole segment (A2) at the first position (A21), and wherein the movable driving member (11) is also used to drive the cutting assembly (12) to move to the second position (A31), wherein the cutting assembly (12) is also used to cut off the second pole segment (A3) at the second position (A31).

8. The waste film removal mechanism according to any one of claims 1 to 7, wherein: The bonding module (3) comprises: A first bonding driving member (31); A first abutment member (32), the first abutment member (32) is connected to the first bonding drive member (31), and the first bonding drive member (31) is used to drive the first abutment member (32) to drive the first adhesive tape (B1) to be bonded to the first pole segment (A2) and the second pole segment (A3) respectively, so that the first cut end (A22) and the second cut end (A32) are bonded to each other.

9. The waste film removal mechanism according to any one of claims 1 to 8, wherein: The waste film removal mechanism also includes: A first fixing module (5), the first fixing module (5) is used to fix the pole piece (A) at a first side at the first position (A21) before cutting off the first pole segment (A2); the pulling module (2) is also used to fix the pole piece (A) at a second side opposite to the first side at the first position (A21) to tighten the first pole segment (A2); the cutting module (1) is used to cut off the first pole segment (A2) at the first position (A21) when the first pole segment (A2) is tightened, wherein the first side and the second side are respectively located on both sides of the first position (A21) along the length direction of the pole piece (A).

10. The waste film removal mechanism according to any one of claims 1 to 9, wherein: The waste film removal mechanism also includes: A second fixing module (6), the second fixing module (6) is located between the pulling module (2) and the first position (A21), and the second fixing module (6) is used to fix one end of the waste segment (A1) facing the first pole segment (A2).

11. The waste film removal mechanism according to claim 10, wherein: The waste film removal mechanism also includes: The waste film winding needle (7), the pulling module (2) is also used to avoid the waste film winding needle (7), the waste film winding needle (7) is used to extend and clamp the waste segment (A1), and the second fixing module (6) is also used to release the waste segment (A1) towards the first pole segment (A2) after the waste film winding needle (7) clamps the waste segment (A1). At one end of the waste film rolling needle (7), the waste film rolling needle (7) is also used to roll up the waste film segment (A1) onto itself.

12. The waste film removal mechanism according to any one of claims 1 to 11, wherein: The pulling module (2) is also used to fix the second pole segment (A3) so as to tighten the second pole segment (A3) together with the waste film rolling needle (7); the cutting module (1) is used to cut the second pole segment (A3) at the second position (A31) after the second pole segment (A3) is tightened; and the waste film rolling needle (7) is used to roll the waste segment (A1) onto itself after the cutting module (1) cuts the second pole segment (A3).

13. The waste film removal mechanism according to any one of claims 112, wherein: The waste film removal mechanism also includes: A waste piece detection module (8), the waste piece detection module (8) is used to detect whether the waste piece (A1) exists on the pole piece (A); A length detection module (9), the length detection module (9) being electrically connected to the waste piece detection module (8), the length detection module (9) being used to confirm the length of the waste piece (A1) when the waste piece (A1) exists on the electrode piece (A), so as to respectively determine the first position (A21) and the second position (A31).

14. The waste film removal mechanism according to any one of claims 2 to 13, wherein: The waste film removal mechanism also includes: A die-cutting quality detection module (9a), wherein the die-cutting quality detection module (9a) is at least used to detect whether the cutting quality of the preset tab (A33) is qualified.

15. A winding device, wherein: include: Unwinding module (100); A cell winding needle (200), the cell winding needle (200) being located downstream of the unwinding module (100), the unwinding module (100) being used to transfer the pole piece (A) to the cell winding needle (200); The waste sheet removal mechanism (300) according to any one of claims 1 to 14, wherein the waste sheet removal mechanism (300) is located between the unwinding module (100) and the battery cell winding needle (200) and is located on the conveying path of the electrode sheet (A), and the end of the first electrode segment (A2) away from the second electrode segment (A3) is wound on the battery cell winding needle (200), and the battery cell winding needle (200) is used to wind the spliced ​​electrode sheet on itself to form the battery cell (D).

16. A battery cell, wherein: The battery core is made by the winding equipment described in claim 15.

Images