Battery winding apparatus, battery production line and control method therefor

Abstract

A battery winding apparatus, a battery production line and a control method therefor, which belong to the technical field of battery production. The battery winding apparatus comprises: a support member; an alignment roller set, movably installed on the support member and used for aligning a plurality of composite electrode sheets; a winding needle, rotatably installed on the support member and used for winding the plurality of composite electrode sheets; a feeding roller set, movably installed on the support member between a standby position and a clamping position in a first direction, and configured to, when located at the clamping position, clamp a blank separator of one composite electrode sheet between the winding needle and the alignment roller set and move in a second direction to adjust a distance between two composite electrode sheets; and a cutter assembly, movably installed on the support member and used for cutting off the composite electrode sheets.

Description

Battery winding equipment, battery production line and control method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202410139051.6 and application date of January 31, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery winding device, a battery production line and a control method thereof. Background Art

[0004] The wound battery cell is formed by winding a positive electrode sheet coated with a positive electrode active material, a negative electrode sheet coated with a negative electrode active material, and two separators made of insulating material in an overlapping state.

[0005] In conventional battery winding devices, the electrode sheets and separators can be fed separately, facilitating adjustment of the tab position after cell winding. However, this adjustment process takes time and results in low single-machine production capacity. Composite winding devices combine the electrode sheets and separators before winding. This winding process eliminates the need for separate electrode sheet feeding, making it difficult to adjust the tab margins individually. This results in large deviations in the tab center distance and a high tab margin defect rate after cell winding. Summary of the Invention

[0006] The present application provides a battery winding device, a battery production line and a control method thereof, so as to solve the technical problem that the tab margin adjustment of general battery winding equipment is difficult, resulting in low production efficiency and high tab margin defect rate.

[0007] In a first aspect, an embodiment of the present application provides a battery winding device, comprising:

[0008] Support members;

[0009] A material-joining roller group, movably mounted on the support member, for joining together a plurality of composite electrode sheets;

[0010] A winding needle is rotatably mounted on the support member, and is used for winding a plurality of composite pole pieces;

[0011] a feed roller assembly, movably mounted on the support member between the standby station and the clamping station along a first direction, wherein the feed roller assembly is configured to, when located at the clamping station, clamp the blank diaphragm of one of the composite electrode sheets between the winding needle and the feed roller assembly and move along a second direction to adjust the spacing between the two composite electrode sheets;

[0012] The cutter assembly can be movably mounted on the support member, and the cutter assembly is used to cut off the composite electrode.

[0013] In the above technical solution, during the winding process, the feed roller group is located at the standby station and does not affect the winding work of the winding needle. In the final stage, the feed roller group is moved to the clamping station to use the feed roller group to adjust the distance between the two composite pole pieces, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment is efficient and accurate, which reduces the deviation of the tab center distance of the composite wound battery cell, improves the yield, and accelerates the project development progress.

[0014] In some embodiments, the cutter assembly is movably arranged between a standby station and a cutting station along a first direction, and the feed roller group and the cutter assembly are configured to move synchronously along the first direction. When the cutter assembly is located at the cutting station, the feed roller group is located at the clamping station.

[0015] In the above technical solution, by making the cutter assembly and the feed roller group move synchronously, the drive mechanism and control circuit can be reduced, the assembly space of the equipment can be optimized, and the operation efficiency can be improved.

[0016] In some embodiments, the battery winding apparatus further comprises:

[0017] a bracket, movably disposed on the support member along a first direction, the cutter assembly and the feed roller assembly being mounted on the bracket;

[0018] The first driving mechanism is dynamically coupled to the bracket and is used to drive the bracket to move along a first direction.

[0019] In the above technical solution, a bracket is provided to drive the cutter assembly and the feed roller group to move synchronously, and the structure is simple and easy to control.

[0020] In some embodiments, the battery winding apparatus further comprises:

[0021] The second driving mechanism, the feed roller group is connected to the bracket in a sliding manner along the second direction, and the second driving mechanism is connected to the feed roller group in a power coupling manner, and is used to drive the feed roller group to slide along the second direction.

[0022] In the above technical solution, a second driving mechanism is provided to drive the feed roller group to slide on the bracket, so as to adjust the spacing between the composite pole pieces.

[0023] In some embodiments, the second driving mechanism is configured to drive the feed roller group to move along the second direction while the cutter assembly is in the cutting station and moves in the direction of cutting the composite pole piece.

[0024] In the above technical solution, the movement of the feed roller group in the second direction is synchronized with the movement of the cutter assembly to reduce the impact of the movement of the feed roller group on the production capacity of a single machine, thereby improving production efficiency.

[0025] In some embodiments, the feed roller set includes two feed rollers;

[0026] The battery winding device further includes a third driving mechanism, which is power-coupled to at least one of the two feed rollers and is used to drive at least one of the two feed rollers to move toward or away from each other.

[0027] In the above technical solution, two feeding rollers and a third driving mechanism are provided, the two feeding rollers are respectively located on both sides of the composite electrode piece, and the third driving mechanism drives the two feeding rollers to clamp or release the composite electrode piece between them.

[0028] In some embodiments, the joining roller group includes a first joining roller and a second joining roller;

[0029] The battery winding device also includes a fourth drive mechanism, which is power-coupled to at least one of the first and second material collecting rollers and is used to drive at least one of the first and second material collecting rollers to move toward or away from each other.

[0030] In the above technical solution, a first feeding roller and a second feeding roller are provided to respectively support two composite pole pieces, and at least one of the first feeding roller and the second feeding roller is driven by a fourth driving mechanism to make the two composite pole pieces close to each other or separated from each other.

[0031] In some embodiments, the fourth driving mechanism is configured to drive at least one of the first and second juxtaposition rollers to move in a direction away from each other before the feed roller set moves from the standby station to the clamping station.

[0032] In the above technical solution, the composite electrode pieces are first separated, and then the feed roller group is controlled to move toward the clamping station so that the feed roller group can clamp a single composite electrode piece.

[0033] In some embodiments, the battery winding apparatus further comprises:

[0034] The main shaft is installed on the support member, and the feeding roller group is used to clamp the blank diaphragm of the composite electrode located on the side away from the main shaft when located at the clamping station.

[0035] In the above technical solution, by clamping the blank diaphragm of the composite electrode away from the main shaft, the feed roller has enough adjustment space to facilitate movement.

[0036] In some embodiments, the battery winding apparatus further comprises:

[0037] The pins are movably mounted on the support member, and are arranged between the main shaft and the material-joining roller group. The pins are configured to clamp the multiple composite pole pieces before the cutter assembly cuts the composite pole pieces.

[0038] In the above technical solution, pins are provided to clamp the composite pole piece before the cutter assembly cuts the composite pole piece, thereby facilitating cutting.

[0039] In a second aspect, an embodiment of the present application provides a battery production line, comprising: a battery winding device as described in any of the above technical solutions; and a feeding mechanism for conveying composite pole sheets to the battery winding device.

[0040] In the above technical solution, the battery production line improves the battery winding equipment. In the final stage, the feed roller group is used to adjust the spacing between the two composite pole pieces to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment is efficient and accurate, reducing the deviation of the tab center distance of the composite wound battery cell, improving the yield, and accelerating the project development progress.

[0041] In a third aspect, an embodiment of the present application provides a control method for a battery winding device as described in any of the above technical solutions, the control method comprising:

[0042] When the winding needle stops rotating, the feed roller group is controlled to move along the first direction to the clamping position, and the feed roller group is controlled to clamp one of the composite electrode pieces;

[0043] Controlling the cutter assembly to move in a direction of cutting the composite electrode piece, and controlling the feed roller group to move a target distance along a second direction to pull the clamped composite electrode piece;

[0044] The cutter assembly is controlled to cut off the composite electrode.

[0045] In the above technical solution, during the winding process, the feed roller group is located at the standby station and does not affect the winding work of the winding needle. In the final stage, the feed roller group is moved to the clamping station to use the feed roller group to adjust the distance between the two composite pole pieces, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment is efficient and accurate, which reduces the deviation of the tab center distance of the composite wound battery cell, improves the yield, and accelerates the project development progress.

[0046] In some embodiments, before controlling the feed roller group to clamp one of the composite pole pieces, the control method further includes:

[0047] Controlling the combining roller group to separate the plurality of composite electrode sheets;

[0048] Before controlling the cutter assembly to cut the composite electrode piece, the control method further includes:

[0049] The material-joining roller group is controlled to bring the plurality of composite pole pieces together.

[0050] In the above technical solution, multiple composite pole pieces are controlled to separate so that the feed roller group can clamp a single composite pole piece, and multiple pole pieces are brought together so that the cutter assembly can cut the multiple composite pole pieces.

[0051] In some embodiments, controlling the feed roller group to move along the first direction to the clamping position includes:

[0052] The feed roller group and the cutter assembly are controlled to move synchronously along a first direction until the feed roller group is located at the clamping station and the cutter assembly is located at the cutting station.

[0053] In the above technical solution, by making the cutter assembly and the feed roller group move synchronously, the drive mechanism and control circuit can be reduced, the assembly space of the equipment can be optimized, and the operation efficiency can be improved.

[0054] In some embodiments, before controlling the feed roller group to move a target distance along the second direction, the control method further includes:

[0055] Obtaining a corrected distance of a tab of one of a plurality of composite pole pieces;

[0056] The target distance is determined based on the corrected distance.

[0057] In the above technical solution, the movement distance of the feed roller group is determined by obtaining the correction distance of the tab, so that the correction of the tab position is more accurate and the product yield is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0059] FIG1 is a schematic diagram of a partial structure of a battery winding device according to some embodiments of the present application;

[0060] FIG2 is a second schematic diagram of a partial structure of a battery winding device provided in some embodiments of the present application;

[0061] FIG3 is a third partial structural diagram of a battery winding device provided in some embodiments of the present application;

[0062] FIG4 is a fourth schematic diagram of a partial structure of a battery winding device provided in some embodiments of the present application;

[0063] FIG5 is a flow chart of a control method for a battery winding device according to some embodiments of the present application;

[0064] FIG6 is a schematic diagram of the position adjustment of the feed roller group provided in some embodiments of the present application.

[0065] Reference numerals: battery winding device 1 , support 11 , winding needle 12 , material-dividing roller group 13 , first material-dividing roller 131 , second material-dividing roller 132 , feed roller group 14 , feed roller 141 , cutter assembly 15 , bracket 16 , main shaft 17 , insertion pin 18 ; composite electrode 2 . DETAILED DESCRIPTION

[0066] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0068] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0070] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0071] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0072] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. As a core component in new energy vehicles, batteries have high requirements for both safety and cycle life.

[0073] In the general production process of power batteries, the battery cells can be produced and processed by winding or stacking. The wound battery cells are formed by winding a positive electrode sheet coated with a positive active material, a negative electrode sheet coated with a negative active material, and two diaphragms made of insulating materials in an overlapping state. Because the production process is relatively simple and the yield is high, it is relatively widely used.

[0074] In conventional battery winding devices, the electrode sheets and separators can be fed separately, facilitating adjustment of the tab position after cell winding. However, this adjustment process takes time and results in low production capacity per unit. Composite winding devices combine the electrode sheets and separators before winding. This winding process eliminates the need for separate electrode sheet feeding, making it difficult to adjust the tab margins. This results in large deviations in the center-to-center distance of the tabs and a high tab margin defect rate after cell winding.

[0075] Based on the above considerations, in order to solve the technical problems of difficulty in adjusting the tab margins of general battery winding equipment, resulting in low production efficiency and a high tab margin defect rate, the present application designs a battery winding equipment, including a support, a winding needle, a material-dividing roller group, a feed roller group, and a cutter assembly. The winding needle can be rotatably mounted on the support and is used to wind multiple composite electrode sheets; the material-dividing roller group can be movably mounted on the support; the feed roller group can be movably mounted on the support along a first direction between a standby station and a clamping station. The feed roller group is configured to clamp the blank diaphragm of one of the composite electrode sheets between the winding needle and the material-dividing roller group when located at the clamping station and move along a second direction to adjust the spacing between the two composite electrode sheets; the cutter assembly can be movably mounted on the support and is used to cut the composite electrode sheets.

[0076] In battery winding equipment of this structure, during the winding process of the composite electrode sheet, the feed roller group is located at the standby station and does not affect the winding work of the winding needle. In the final stage, the feed roller group is moved to the clamping station to adjust the distance between the two composite electrode sheets, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment is efficient and accurate, which reduces the deviation of the tab center distance of the composite wound battery cell, improves the yield, and accelerates the project development progress.

[0077] According to some embodiments of the present application, referring to Figures 1 to 4 , the present application provides a battery winding device 1 , which includes a support 11 , a winding needle 12 , a feed roller assembly 13 , a feed roller assembly 14 , and a cutter assembly 15 .

[0078] In this embodiment, the support member 11 may include a machine table and a support plate. The support plate can be installed on the machine table in a vertical direction. The support plate can be used to separate the winding station and part of the driving mechanism. In order to facilitate the understanding of the scheme, the subsequent description will be based on the support member 11 being the support plate.

[0079] The winding needle 12 is rotatably mounted on the support 11 and is used to wind multiple composite electrode sheets 2. The winding needle 12 is arranged in a direction perpendicular to the support plate and is rotatably mounted on the support 11 around its axis. The winding needle 12 clamps multiple composite electrode sheets 2 and rotates to wind multiple composite electrode sheets 2 into a battery cell.

[0080] The composite electrode 2 is conveyed to the battery winding device by a feeding mechanism (not shown in the figure). The composite electrode 2 conveyed by the feeding mechanism includes a diaphragm and multiple electrode sheets, and the multiple electrode sheets on the same diaphragm are spaced apart from each other. The electrode sheet is compounded with a part of the diaphragm, and there is a blank diaphragm without compounded electrode sheets between two adjacent electrode sheets on the same diaphragm.

[0081] It should be noted that the number of composite electrodes 2 is not limited here. The multiple composite electrodes 2 in the embodiment of the present application include at least one positive composite electrode and one negative composite electrode. The positive composite electrode includes a positive electrode and an insulating diaphragm, and the negative composite electrode includes a negative electrode and an insulating diaphragm.

[0082] The feed roller assembly 13 may include multiple rollers, each roller or multiple rollers thereof being used to support or tension one of the composite electrode sheets 2. Each roller in the feed roller assembly 13 is cylindrical and rotatably mounted on the support member 11 along its central axis. The material objects conveyed by the feed roller assembly 13 are multiple composite electrode sheets 2. The feed roller assembly 13 is movably mounted on the support member 11, that is, in addition to the rotational freedom about its own central axis, each roller in the feed roller assembly 13 may also have other degrees of freedom. The feed roller assembly 13 is used to bring multiple composite electrode sheets 2 together. It is understood that the feed roller assembly 13 is located on the side of the winding needle 12 close to the feeding mechanism, that is, on the electrode sheet transmission path, the feed roller assembly 13 is located upstream of the winding needle. The composite electrode sheets first pass through the feed roller assembly 13, which brings the multiple composite electrode sheets 2 together, and then controls the winding needle 12 to wind the multiple composite electrode sheets 2 together.

[0083] As shown in Figures 2 and 3, Figure 2 is a schematic diagram of the structure of the feed roller group 14 at the standby station, and Figure 3 is a schematic diagram of the structure of the feed roller group 14 at the clamping station. The feed roller group 14 can include multiple rollers, each of which is cylindrical and can rotate around its own central axis. When in the clamping station, the feed roller group 14 can clamp the blank diaphragm in the composite electrode sheet 2, so that the multiple composite electrode sheets 2 that are brought together by the merging roller group 13 can be separated, and the alignment position of the clamped composite electrode sheet 2 with another composite electrode sheet 2 along the length direction can be adjusted, that is, the feeding position of the composite electrode sheet 2.

[0084] The feed roller assembly 14 is movably mounted on the support member 11 along a first direction between a standby position and a clamping position. The standby position and the clamping position are the two working positions of the feed roller assembly 14. In the standby position, the feed roller assembly 14 does not contact the composite electrode sheet to reduce the risk of interfering with the winding needle. In the clamping position, the feed roller assembly 14 clamps the blank diaphragm of one of the composite electrode sheets. When in the clamping position, the feed roller assembly 14 is configured to clamp the blank diaphragm of one of the composite electrode sheets 2 between the winding needle 12 and the feed roller assembly 13 and move along the second direction to adjust the spacing between the two composite electrode sheets 2.

[0085] In this embodiment, the direction perpendicular to the support member 11 is the first direction, and the second direction is set parallel to the support member 11. During the winding process, the composite electrode sheet 2 moves in a direction parallel to the support member 11. By setting the feed roller group 14 to move along the first direction, during the winding process of the composite electrode sheet 2, the feed roller group 14 is stationary at the standby position, and the standby position is spaced apart from the support member 11. When the feed roller group 14 is located at the standby position, it is staggered with the composite electrode sheet 2 to avoid the winding needle 12 and the composite electrode sheet 2.

[0086] At the end of winding, the winding needle 12 stops rotating, and multiple composite pole pieces 2 are separated. The feed roller group 14 can move along the first direction to the clamping station, and the feed roller group 14 clamps one of the composite pole pieces 2 when it is located at the clamping station. Specifically, the composite pole piece 2 is clamped on the blank diaphragm between the winding needle 12 and the feeding roller group 13. The feed roller group 14 moves along the second direction to pull the clamped composite pole piece 2, and the alignment position of the clamped composite pole piece 2 with another composite pole piece 2 along the length direction can be adjusted, thereby changing the feeding position of the composite pole piece 2 to adjust the pole ear spacing of the wound battery cell.

[0087] The cutter assembly 15 is movably mounted on the support 11 and is used to cut the composite electrode sheet 2. In this embodiment, the cutter assembly 15 is movably arranged in a direction parallel to the support 11 so that the cutter assembly 15 can cut the composite electrode sheet 2 after the feed roller assembly 14 adjusts the position of the composite electrode sheet 2, so that the winding needle 12 can complete the finishing.

[0088] In actual implementation, as shown in FIG1 , at the end stage of winding the composite electrode sheet 2, it is necessary to control the winding needle 12 to stop rotating and cut the composite electrode sheet 2 to facilitate the end. Before the cutter assembly 15 cuts the composite electrode sheet 2, the material roller group 13 is separated so that multiple composite electrode sheets 2 can be separated from each other under traction. As shown in FIG4 , by moving the feed roller group 14 to the clamping station and clamping one of the composite electrode sheets 2, and driving it to move along the second direction, it is equivalent to adjusting the position where the composite electrode sheet is cut by the cutter assembly 15, thereby changing the feed position of the composite electrode sheet 2 corresponding to the next battery cell. By sensing the position of the tab, the moving distance of the feed roller group 14 is accurately controlled to adjust the feed position of the composite electrode sheet 2 correctly, so that after the winding of the next battery cell is completed, the center distance deviation of the positive and negative tabs is small, thereby improving the yield of the tab margin.

[0089] According to the battery winding device 1 of the embodiment of the present application, the feed roller group 14 is located at the standby position during the winding process and does not affect the winding work of the winding needle 12. In the final stage, the feed roller group 14 is moved to the clamping position to use the feed roller group 14 to adjust the spacing between the two composite pole pieces 2, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment efficiency is high and the accuracy is high, which reduces the deviation of the tab center distance of the composite wound battery cell, improves the yield, and accelerates the project development progress.

[0090] According to some embodiments of the present application, the cutter assembly 15 can be movably arranged along a first direction between a standby station and a cutting station. The standby station and the cutting station are two working positions of the cutter assembly 15. In the standby station, the cutter assembly 15 does not contact the composite electrode sheet to reduce the risk of interfering with the winding needle. In the cutting station, the cutter assembly 15 cuts the composite electrode sheet. The feed roller assembly 14 and the cutter assembly 15 are configured to move synchronously along the first direction. When the cutter assembly 15 is in the cutting station, the feed roller assembly 14 is in the clamping station.

[0091] The cutter assembly 15 can also move along the first direction. During the winding process, the cutter assembly 15 is located at a standby position spaced apart from the support member 11. It can be understood that when the cutter assembly 15 is located at the standby position, it is offset from the composite electrode sheet 2. In the finishing stage, the cutter assembly 15 can move along the first direction close to the support member 11 to the cutting position so as to face the diaphragm of the composite electrode sheet 2.

[0092] In this embodiment, the feed roller group 14 and the cutter assembly 15 are configured to be able to move synchronously along the first direction, so that in the final stage, the feed roller group 14 and the cutter assembly 15 move synchronously along the first direction close to the support member 11, and when the cutter assembly 15 is located at the cutting station, the feed roller group 14 can be synchronously located at the clamping station to avoid the need to separately control the movement of the feed roller group 14 and the cutter assembly 15, thereby reducing the control process and improving production efficiency.

[0093] According to the embodiment of the present application, by synchronously moving the cutter assembly 15 and the feed roller group 14, the drive mechanism and control circuit can be reduced, the assembly space of the equipment can be optimized, and the operation efficiency can be improved.

[0094] As shown in Figures 1 and 4, according to some embodiments of the present application, the battery winding device 1 may further include a bracket 16 and a first driving mechanism. The bracket 16 can be movably arranged on the support member 11 along the first direction, and the cutter assembly 15 and the feed roller group 14 can be installed on the bracket 16; the first driving mechanism can be dynamically coupled to the bracket 16 to drive the bracket 16 to move along the first direction.

[0095] In this embodiment, the first drive mechanism can also be mounted on the support member 11. The first drive mechanism drives the bracket 16 to move in the first direction toward and away from the support member 11, thereby driving the cutter assembly 15 and the feed roller assembly 14 to move synchronously in the first direction. By providing the bracket 16, only a single drive mechanism is required to drive the cutter assembly 15 and the feed roller assembly 14. The first drive mechanism can be a linear motion module or a drive cylinder, and the specific form is not limited here.

[0096] According to the embodiment of the present application, a bracket 16 and a first driving mechanism are provided to drive the cutter assembly 15 and the feed roller group 14 to move synchronously, and the structure is simple and easy to control.

[0097] According to some embodiments of the present application, the battery winding device 1 may further include a second driving mechanism, the feed roller group 14 and the bracket 16 may be slidably connected along the second direction, and the second driving mechanism may be power-coupled with the feed roller group 14 to drive the feed roller group 14 to slide along the second direction.

[0098] In this embodiment, the second driving mechanism can be installed on the bracket 16, and the second driving mechanism can be connected to the feed roller group 14 by power coupling, so that the second driving mechanism can drive the feed roller group 14 to move along the second direction on the bracket 16, wherein the second driving mechanism can be a linear motion module to control the moving distance of the feed roller group 14 in the second direction, so as to facilitate the accurate adjustment of the pole ear margin.

[0099] According to the embodiment of the present application, a second driving mechanism is provided to drive the feed roller set 14 to slide on the bracket 16 , so as to adjust the spacing between the composite pole pieces 2 .

[0100] As shown in FIG. 1 and FIG. 4 , according to some embodiments of the present application, the second driving mechanism may be configured to drive the feed roller group 14 to move in the second direction while the cutter assembly 15 is in the cutting station and moves in the direction of cutting the composite pole piece 2 .

[0101] In this embodiment, in order to reduce the impact of the adjustment action of the feed roller group 14 on the production capacity of a single machine, while the cutter assembly 15 is in the cutting station and moves in the direction of cutting the composite electrode 2, the feed roller group 14 is driven to move synchronously to adjust the position of the composite electrode 2. It can be understood that the adjustment action of the feed roller group 14 can be completed before the cutter assembly 15 cuts off the composite electrode 2 because the stroke is generally not large. While adjusting the electrode ear margin, the impact on the production capacity of a single machine is reduced.

[0102] According to an embodiment of the present application, the movement of the feed roller assembly 14 in the second direction is synchronized with the movement of the cutter assembly 15 to reduce the impact of the movement of the feed roller assembly 14 on the production capacity of a single machine, thereby improving production efficiency.

[0103] As shown in Figures 1 to 4, according to some embodiments of the present application, the feed roller group 14 may include two feed rollers 141, and the battery winding device 1 may further include a third drive mechanism, which may be power-coupled to at least one of the two feed rollers 141 to drive at least one of the two feed rollers 141 to move in a direction closer to or away from each other.

[0104] In order to enable the feed roller group 14 to effectively clamp the composite electrode 2, the feed roller group 14 can include two feed rollers 141. When the feed roller group 14 is located at the standby position, the two feed rollers 141 are separated so that when the two feed rollers 141 move from the standby position to the clamping position, the two feed rollers 141 can be located on both sides of the corresponding composite electrode 2 in the second direction.

[0105] In this embodiment, the third driving mechanism can also be installed on the bracket 16, and the third driving mechanism can be dynamically coupled to at least one of the two feed rollers 141. When the two feed rollers 141 are located in the clamping position, the third driving mechanism can drive at least one of the two feed rollers 141 to move in a direction close to each other, so that the two feed rollers 141 are clamped on the two sides of the composite electrode 2 in the second direction, making it convenient for the feed roller group 14 to stably drive the composite electrode 2 to move.

[0106] In one example, the third drive mechanism can be coupled to the two feed rollers 141 to drive the two feed rollers 141 to move simultaneously. In another example, the third drive mechanism can be coupled to one of the two feed rollers 141 to drive the feed roller 141 to move independently. The specific method is not limited here.

[0107] According to the embodiment of the present application, two feeding rollers 141 and a third driving mechanism are provided, and the two feeding rollers 141 are respectively located on both sides of the composite pole piece 2, and the third driving mechanism drives the two feeding rollers 141 to clamp or release the composite pole piece 2 located therebetween.

[0108] As shown in Figures 1 to 4, according to some embodiments of the present application, the feed roller group 13 may include a first feed roller 131 and a second feed roller 132, and the battery winding device 1 may further include a fourth drive mechanism, which may be power-coupled to at least one of the first feed roller 131 and the second feed roller 132 to drive at least one of the first feed roller 131 and the second feed roller 132 to move in a direction closer to or away from each other.

[0109] The feeding roller group 13 may include a first feeding roller 131 and a second feeding roller 132 for supporting two different composite pole pieces 2 respectively. The fourth driving mechanism can be installed on the support member 11. The first feeding roller 131 and the second feeding roller 132 are driven by the fourth driving mechanism to move in a direction close to or away from each other, thereby driving the two composite pole pieces 2 to move closer together and away from each other.

[0110] In this embodiment, in order to facilitate the feed roller group 14 to accurately clamp the corresponding composite electrode 2, the first feed roller 131 and the second feed roller 132 can be arranged along the second direction, and the fourth drive mechanism can drive the first feed roller 131 and the second feed roller 132 to move along the second direction, so that when the first feed roller 131 and the second feed roller 132 move in the direction away from each other, the two composite electrode pieces 2 are separated along the second direction, which facilitates the two feed rollers 141 of the feed roller group 14 to clamp the corresponding composite electrode piece 2 on both sides of the second direction.

[0111] In one example, the fourth drive mechanism can be coupled to the first and second feed rollers 131, 132 for driving the first and second feed rollers 131, 132 to move simultaneously. In another example, the third drive mechanism can also be coupled to the first feed roller 131 for driving the first feed roller 131 to move independently. In yet another example, the third drive mechanism can also be coupled to the second feed roller 132 for driving the second feed roller 132 to move independently. The specific method is not limited here.

[0112] It should be noted that the polarity of the composite electrode sheets 2 supported by the first and second feeding rollers 131 and 132 is not limited here. It is determined according to the order of incoming materials, so that the first feeding roller 131 can support both the positive and negative composite electrode sheets 2, and the same applies to the second feeding roller 132. Correspondingly, the polarity of the composite electrode sheets 2 clamped by the feed roller group 14 is also not limited here. It is determined according to the order of incoming materials, and can clamp the positive composite electrode sheet 2 to adjust the position of the positive electrode tab, or clamp the negative composite electrode sheet 2 to adjust the position of the negative electrode tab.

[0113] According to an embodiment of the present application, a first material feeding roller 131 and a second material feeding roller 132 are provided to respectively support two composite pole pieces 2, and at least one of the first material feeding roller 131 and the second material feeding roller 132 is driven by a fourth driving mechanism to make the two composite pole pieces 2 close to each other or separated from each other.

[0114] According to some embodiments of the present application, the fourth driving mechanism may be configured to drive at least one of the first and second juxtaposition rollers 131 and 132 to move away from each other before the feed roller set 14 moves from the standby station to the clamping station.

[0115] In this embodiment, in order for the feed roller group 14 to accurately clamp the corresponding composite electrode sheet 2, the fourth drive mechanism needs to drive the first feed roller 131 and the second feed roller 132 to move away from each other before the feed roller group 14 moves from the standby station to the clamping station, so that the composite electrode sheets 2 are separated and spaced a certain distance apart, so that one of the feed rollers 141 can be inserted between the two composite electrode sheets 2.

[0116] According to the embodiment of the present application, the composite pole pieces 2 are first separated, and then the feed roller group 14 is controlled to move toward the clamping station so that the feed roller group 14 can clamp a single composite pole piece 2.

[0117] As shown in Figures 1 to 4, according to some embodiments of the present application, the battery winding device 1 may further include a main shaft 17 installed on the support member 11, and the feed roller group 14 is used to clamp the blank diaphragm of the composite electrode 2 located on the side away from the main shaft 17 when located at the clamping station.

[0118] In this embodiment, the main shaft 17 is mounted on the support member 11 along the first direction, and the winding needle 12 is spaced apart from the main shaft 17. The winding needle 12 can rotate on its own while also being arranged to revolve around the axis of the main shaft 17. For example, the material-joining roller group 13 can be located on the upper side of the main shaft 17. In the final stage, the winding needle 12 can be located on the left side of the main shaft 17, so that the two composite pole pieces 2 between the winding needle 12 and the material-joining roller group 13 can be separated in the direction of approaching and moving away from the main shaft 17.

[0119] In the final stage, when the feed roller 141 is located at the clamping station, it can clamp the blank diaphragm of the composite electrode 2 located on the side away from the main shaft 17, and can drive the composite electrode 2 to move along the second direction away from the main shaft 17. By clamping the composite electrode 2 on the side away from the main shaft 17, the feed roller 141 has a larger movable space and is not easy to interfere with other devices on the equipment, such as the main shaft 17, which facilitates the adjustment of the length of the composite electrode 2.

[0120] According to the embodiment of the present application, the blank diaphragm of the composite electrode 2 away from the main shaft 17 is clamped so that the feeding roller 141 has enough adjustment space to facilitate the movement.

[0121] As shown in Figure 4, according to some embodiments of the present application, the battery winding device 1 may further include a pin 18, which can be movably mounted on the support 11. The pin 18 can be arranged between the main shaft 17 and the material feeding roller group 13. The pin 18 can be configured to clamp multiple composite pole sheets 2 before the cutter assembly 15 cuts the composite pole sheets 2.

[0122] In this embodiment, the pin 18 is movably mounted on the support member 11 along the first direction, wherein the pin 18 can be arranged between the main shaft 17 and the material joining roller. Before the cutter assembly 15 cuts the composite electrode sheet 2, the material joining roller group 13 brings the multiple composite electrode sheets 2 together so that the cutter assembly 15 can cut the multiple composite electrode sheets 2 at the same time. The part of the composite electrode sheet 2 located between the main shaft 17 and the material joining roller group 13 is clamped by the pin 18 to keep the position of the composite electrode sheet 2 fixed, so that the cutter assembly 15 can cut the composite electrode sheet 2 conveniently.

[0123] It should be noted that when cutting the composite pole piece 2 , the cutter assembly 15 moves in a direction close to the main shaft 17 and cuts the portion of the composite pole piece 2 between the insertion pin 18 and the winding pin 12 .

[0124] It should be further explained that after the pins 18 clamp the multiple composite pole pieces 2 and before the cutter assembly 15 cuts the multiple composite pole pieces 2, the third drive mechanism can be controlled to control the two feed rollers 141 to separate in a direction away from each other to release the composite pole pieces 2 clamped by them.

[0125] According to the embodiment of the present application, the pins 18 are provided to clamp the composite pole piece 2 before the cutter assembly 15 cuts the composite pole piece 2, thereby facilitating cutting.

[0126] As shown in FIG5 , according to some embodiments of the present application, the present application further provides a control method for a battery winding device 1 such as any of the above technical solutions, and the control method includes steps 610 , 620 and 630 .

[0127] Step 510: When the winding needle 12 stops rotating, the feed roller group 14 is controlled to move along the first direction to the clamping position, and the feed roller group 14 is controlled to clamp one of the composite electrode pieces 2;

[0128] Step 520: Control the cutter assembly 15 to move in the direction of cutting the composite electrode piece 2, and control the feed roller assembly 14 to move a target distance along the second direction to pull the clamped composite electrode piece 2;

[0129] Step 530 : Control the cutter assembly 15 to cut the composite electrode 2 .

[0130] When the winding enters the final stage, the winding needle 12 stops rotating. When the winding needle 12 stops rotating, the first driving mechanism is controlled to drive the feed roller group 14 to move along the first direction to the clamping position, and the third driving mechanism drives the feed roller group 14 to clamp the composite pole piece 2 located on the side away from the main shaft 17.

[0131] The cutter assembly 15 is controlled to move in the direction of cutting the composite electrode piece 2 , and the second driving mechanism is controlled to drive the feed roller group 14 to move a target distance along the second direction to pull the clamped composite electrode piece 2 , thereby adjusting the tab position of the composite electrode piece 2 .

[0132] After the feed roller assembly 14 adjusts the position of the composite electrode piece 2 , the cutter assembly 15 is controlled to cut the composite electrode piece 2 , so that the subsequent winding needle 12 completes the winding of the remaining composite electrode piece 2 .

[0133] The cutter assembly 15 can be controlled to move in the direction of cutting the composite electrode 2, and the feed roller assembly 14 can be controlled to move along the second direction at the same time, so as to improve the processing efficiency and increase the production capacity of a single machine.

[0134] According to the control method of the embodiment of the present application, during the winding process, the feed roller group 14 is located at the standby position and does not affect the winding work of the winding needle 12. In the final stage, the feed roller group 14 is moved to the clamping position to use the feed roller group 14 to adjust the spacing between the two composite pole pieces 2, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment efficiency is high and the accuracy is high, which reduces the deviation of the tab center distance of the composite wound battery cell, improves the yield, and accelerates the project development progress.

[0135] According to some embodiments of the present application, before the step of controlling the feed roller group 14 to clamp one of the composite pole pieces 2 , the control method further includes: controlling the merging roller group 13 to separate the multiple composite pole pieces 2 .

[0136] In this embodiment, because the two composite pole pieces 2 are close together during the winding process, in the final stage, it is necessary to first control the fourth drive mechanism to drive the first feeding roller 131 and / or the second feeding roller 132 to move in a direction away from each other to separate the two composite pole pieces 2, so that the feed roller group 14 can clamp one of the composite pole pieces 2.

[0137] Before controlling the cutter assembly 15 to cut the composite electrode sheets 2 , the control method further includes: controlling the joining roller group 13 to bring the plurality of composite electrode sheets 2 together.

[0138] In this embodiment, in order to facilitate the cutter assembly 15 to cut the composite pole piece 2 and to ensure that the cutting position of multiple composite pole pieces 2 is accurate, before the cutter assembly 15 cuts the composite pole piece 2, it is necessary to first control the fourth drive mechanism to drive the first material feed roller 131 and / or the second material feed roller 132 to move in a direction close to each other, so that the two composite pole pieces 2 are brought together, so that the cutter assembly 15 can cut multiple composite pole pieces 2.

[0139] It should be noted that, while controlling the cutter assembly 15 to move toward the composite electrode sheet 2 , the joining roller group 13 can be controlled to bring the multiple composite electrode sheets 2 together, so as to improve the production capacity of a single machine.

[0140] In the above technical solution, multiple composite pole pieces 2 are controlled to separate so that the feed roller group 14 can clamp a single composite pole piece 2, and multiple pole pieces are brought together so that the cutter assembly 15 can cut multiple composite pole pieces 2.

[0141] According to some embodiments of the present application, the step of controlling the feed roller set 14 to move along the first direction to the clamping position includes:

[0142] The feed roller assembly 14 and the cutter assembly 15 are controlled to move synchronously along the first direction until the feed roller assembly 14 is located at the clamping position and the cutter assembly 15 is located at the cutting position.

[0143] In this embodiment, the feed roller group 14 and the cutter assembly 15 are configured to be able to move synchronously along the first direction, so that in the final stage, the feed roller group 14 and the cutter assembly 15 move synchronously along the first direction close to the support member 11, and when the cutter assembly 15 is located at the cutting station, the feed roller group 14 can be synchronously located at the clamping station to avoid the need to separately control the movement of the feed roller group 14 and the cutter assembly 15, thereby reducing the control process and improving production efficiency.

[0144] According to the embodiment of the present application, by synchronizing the movement of the cutter assembly 15 and the feed roller assembly 14, the drive mechanism and control circuits can be reduced, the assembly space of the equipment can be optimized, and the operation efficiency can be improved.

[0145] According to some embodiments of the present application, before controlling the feed roller set 14 to move the target distance along the second direction, the control method may further include:

[0146] Obtaining a corrected distance of a tab of one of the plurality of composite pole pieces 2;

[0147] Determine the target range based on the corrected range.

[0148] As shown in Figure 6, in this embodiment, the battery winding equipment 1 is provided with a tab position sensor, which obtains the position information of the tab of one of the multiple composite pole pieces 2 through the sensor. When the position of the tab is detected to be correct, the correction distance is 0. When the position of the tab is detected to be incorrect, the correction distance of the tab is determined, wherein each correction distance corresponds to a determined target distance, and the corresponding composite pole piece 2 is pulled to move the target distance by controlling the feed roller group 14 to make the tab position of the corresponding composite pole piece 2 correct.

[0149] It should be noted that when the position of the tab is detected to be correct, that is, when the correction distance is 0, there is also a corresponding target distance. That is, when the position of the tab is correct, it is also necessary to control the feed roller group 14 to move the target distance along the second direction. An exemplary explanation is given in conjunction with FIG6 , which shows a schematic diagram of the feed roller group 14 moving different target distances, wherein when the correction distance is 0, the feed roller group 14 moves to point B. When it is detected that the tab margin is too large, the correction distance is greater than 0, and the feed roller group 14 moves to point A. When it is detected that the tab margin is too small, the correction distance is less than 0, and the feed roller group 14 moves to point C.

[0150] According to the embodiment of the present application, the correction distance of the tab is obtained to determine the moving distance of the feed roller group 14, so that the correction of the tab position is more accurate and the product yield is improved.

[0151] According to some embodiments of the present application, referring to Figures 1-4, the present application provides a battery winding device 1, which includes a support 11, a main shaft 17, a winding needle 12, a material-joining roller group 13, a bracket 16, a feed roller group 14, a cutter assembly 15, an insertion pin 18, a first drive mechanism, a second drive mechanism, a third drive mechanism and a fourth drive mechanism.

[0152] The support member 11 can be a support plate, which is arranged in a vertical direction. The main shaft 17 is installed on the support plate and extends along the first direction. The winding needle 12 is installed on the support plate and extends along the first direction. The winding needle 12 can rotate along its axis and can be arranged to revolve around the axis of the main shaft 17. The winding needle 12 is used to wind multiple composite pole pieces 2.

[0153] The feed roller group 13 is provided on the upper side of the main shaft 17. The feed roller group 13 includes a first feed roller 131 and a second feed roller 132 distributed along the second direction. The first feed roller 131 and the second feed roller 132 are respectively used to support two composite electrode sheets 2. The fourth drive mechanism is coupled to at least one of the first feed roller 131 and the second feed roller 132 for driving one of the first feed roller 131 and the second feed roller 132 to move in a direction toward or away from each other.

[0154] The bracket 16 is movably mounted on the support 11 along a first direction, the feed roller group 14 and the cutter assembly 15 are mounted on the bracket 16, and the first driving mechanism is power-coupled with the bracket 16 for driving the bracket 16 to move along the first direction, so that the bracket 16 drives the feed roller group 14 and the cutter assembly 15 to move from the standby position to the support 11, and when the bracket 16 moves to a position close to the support 11, the cutter assembly 15 is located at the cutting position and the feed roller group 14 is located at the clamping position.

[0155] The feed roller group 14 includes two feed rollers 141, and the third drive mechanism is power-coupled with at least one of the two feed rollers 141, and is used to drive the two feed rollers 141 to move in directions close to and away from each other. When the two feed rollers 141 are in the standby position, the two feed rollers 141 are separated in the direction away from each other. When the two feed rollers 141 are in the clamping position, the two feed rollers 141 are located on both sides of the composite pole piece 2 away from the main shaft 17. The third drive mechanism is configured to drive the two feed rollers 141 to move in the direction close to each other to clamp the corresponding composite pole piece 2 when the feed roller group 14 moves to the clamping position.

[0156] The feed roller set 14 is slidably mounted on the bracket 16 along the second direction. The bracket 16 is also provided with a second driving mechanism for driving the feed roller set 14 to move away from the main shaft 17 along the second direction.

[0157] When located at the cutting station, the cutter assembly 15 can move in a direction close to the composite electrode sheets 2 and cut off a plurality of composite electrode sheets 2 .

[0158] The second drive mechanism and the fourth drive mechanism are configured such that, while the cutter assembly 15 is in the cutting position and moving in the direction of cutting the composite electrode sheets 2, the second drive mechanism drives the feed roller set 14 to move in the second direction, and the fourth drive mechanism drives the first feed roller 141 and the second feed roller 141 to separate. The third drive mechanism is configured to drive the two feed rollers 141 to separate after the pins 18 clamp the multiple composite electrode sheets 2.

[0159] The present application also discloses a battery production line, comprising: a feeding mechanism and a battery winding device 1.

[0160] The feeding mechanism is used to convey the composite electrode sheet to the battery winding device 1; the battery winding device 1 is the battery winding device 1 of any of the above embodiments.

[0161] The battery production line of the present application is designed with a battery winding device 1 of the above-mentioned structural form. During the winding process, the feed roller group 14 is located at the standby position and does not affect the winding work of the winding needle 12. In the final stage, the feed roller group 14 is moved to the clamping position to use the feed roller group 14 to adjust the spacing between the two composite pole pieces 2, so as to adjust the tab margins of the cathode and anode after the battery cell is wound and formed. The adjustment efficiency is high and the accuracy is high, which can reduce the deviation of the tab center distance of the composite wound battery cell, improve the yield rate, and accelerate the progress of project development.

[0162] The battery production line may also include other mechanisms, including a composite mechanism for composite electrodes and diaphragms, a packaging mechanism for packaging batteries, and the like.

[0163] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0164] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery winding device, wherein: include: Support members; A material-joining roller group, movably mounted on the support member, for joining together a plurality of composite electrode sheets; A winding needle, rotatably mounted on the support member, and used for winding the plurality of composite pole pieces; a feed roller assembly, movably mounted on the support member between the standby station and the clamping station along a first direction, wherein the feed roller assembly is configured to, when located at the clamping station, clamp the blank diaphragm of one of the composite electrode sheets between the winding needle and the feed roller assembly and move along a second direction to adjust the spacing between the two composite electrode sheets; The cutter assembly can be movably mounted on the support member, and the cutter assembly is used to cut off the composite electrode.

2. The battery winding device according to claim 1, wherein: The cutter assembly is movably arranged between the standby station and the cutting station along a first direction, and the feed roller group and the cutter assembly are configured to move synchronously along the first direction. When the cutter assembly is located at the cutting station, the feed roller group is located at the clamping station.

3. The battery winding device according to claim 2, wherein: Also includes: a bracket, movably disposed on the support member along a first direction, the cutter assembly and the feed roller assembly being mounted on the bracket; The first driving mechanism is dynamically coupled to the bracket and is used to drive the bracket to move along a first direction.

4. The battery winding device according to claim 3, wherein: Also includes: The second driving mechanism, the feed roller group is connected to the bracket in a sliding manner along the second direction, and the second driving mechanism is connected to the feed roller group in a power coupling manner, and is used to drive the feed roller group to slide along the second direction.

5. The battery winding device according to claim 4, wherein: The second driving mechanism is configured to drive the feed roller group to move along the second direction while the cutter assembly is in the cutting position and moves in the direction of cutting the composite electrode sheet.

6. The battery winding device according to any one of claims 1 to 5, wherein: The feed roller group includes two feed rollers; The battery winding device further includes a third driving mechanism, which is power-coupled to at least one of the two feed rollers and is used to drive at least one of the two feed rollers to move toward or away from each other.

7. The battery winding device according to any one of claims 1 to 6, wherein: The mixing roller group includes a first mixing roller and a second mixing roller; The battery winding device also includes a fourth drive mechanism, which is power-coupled to at least one of the first and second material collecting rollers and is used to drive at least one of the first and second material collecting rollers to move toward or away from each other.

8. The battery winding device according to any one of claims 1 to 7, wherein: The fourth driving mechanism is configured to drive at least one of the first and second joining rollers to move in a direction away from each other before the feed roller group moves from the standby station to the clamping station.

9. The battery winding device according to any one of claims 1 to 8, wherein: Also includes: The main shaft is installed on the support member, and the feeding roller group is used to clamp the blank diaphragm of the composite electrode located on the side away from the main shaft when located at the clamping station.

10. The battery winding apparatus according to claim 9, wherein: Also includes: The pins are movably mounted on the support member, and are arranged between the main shaft and the material-joining roller group. The pins are configured to clamp the multiple composite pole pieces before the cutter assembly cuts the composite pole pieces.

11. A battery production line, wherein: include: The battery winding device according to any one of claims 1 to 10; The feeding mechanism is used to convey the composite electrode sheet to the battery winding equipment.

12. A method for controlling a battery winding device according to any one of claims 1 to 11, wherein: The control method includes: When the winding needle stops rotating, the feed roller group is controlled to move along the first direction to the clamping position, and the feed roller group is controlled to clamp the blank diaphragm of one of the composite electrode pieces; Controlling the cutter assembly to move in a direction of cutting the composite electrode piece, and controlling the feed roller group to move a target distance along a second direction to pull the clamped composite electrode piece; The cutter assembly is controlled to cut off the composite electrode.

13. The control method of the battery winding equipment according to claim 12, wherein: Before controlling the feed roller group to clamp one of the composite electrode pieces, the control method further includes: Controlling the combining roller group to separate the plurality of composite electrode sheets; Before controlling the cutter assembly to cut the composite electrode piece, the control method further includes: The material-joining roller group is controlled to bring the plurality of composite pole pieces together.

14. The control method of the battery winding equipment according to claim 12 or 13, wherein: The step of controlling the feed roller group to move along the first direction to the clamping position includes: The feed roller group and the cutter assembly are controlled to move synchronously along a first direction until the feed roller group is located at the clamping station and the cutter assembly is located at the cutting station.

15. The control method of the battery winding equipment according to any one of claims 12 to 14, wherein: Before controlling the feed roller group to move the target distance along the second direction, the control method further includes: Obtaining a corrected distance of a tab of one of a plurality of composite pole pieces; The target distance is determined based on the corrected distance.

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