Rolling device for battery pole piece

Abstract

The utility model relates to the field of battery processing, in particular to a battery pole piece rolling device which comprises a first tension partition roller. The roller is provided with a second extrusion gap for the pole piece to pass through; the first tension measuring roller comprises a first tension measuring part and a second tension measuring part which are arranged at an interval in the axial direction of the first tension measuring roller; the pole piece comprises a first edge and a second edge which are oppositely arranged in the width direction of the pole piece, and the first tension measuring part and the second tension measuring part measure the tension at the first edge and the tension at the second edge respectively; the first adjusting roller comprises a first adjusting roller body and a first driving part, and the first driving part responds to the first tension measuring part and the second tension measuring part to adjust the relative height of the two ends of the first adjusting roller body so as to adjust the acting force between the first adjusting roller and the pole piece. By applying the technical scheme provided by the invention, the problem that the pole piece is easy to break during rolling in the prior art can be effectively solved.

Description

Technical Field

[0001] The present application relates to the field of battery processing, and in particular to a rolling device for battery pole pieces. Background Art

[0002] The battery pole sheet rolling device is one of the key equipment in the lithium-ion battery manufacturing process. It is mainly used to compact the coated pole sheets.

[0003] Current battery electrode sheet rolling devices are equipped with an unwinding mechanism, a floating roller, a nip roller, and a rewinding mechanism, from upstream to downstream. The floating roller is located upstream of the nip roller and can be adjusted in height to ensure that the electrode sheet has a predetermined tension before entering the nip roller, ensuring that the electrode sheet enters the nip roller in a flat and straight state.

[0004] However, before the electrode enters the roller, there is a possibility that the tension at the two edges in the width direction is different, resulting in inconsistent tension at the two edges of the electrode when the roller is rolling, and the electrode may break after rolling. Utility Model Content

[0005] The present application provides a rolling device for battery pole pieces, which is used to solve the problem in the related art that pole pieces are easily broken during rolling.

[0006] The present application provides a rolling device for a battery electrode, comprising: a first tension-breaking roller, comprising a first extrusion gap for the electrode to pass through; a rolling roller, arranged downstream of the first tension-breaking roller, the rolling roller having a second extrusion gap for the electrode to pass through; a first tension-measuring roller, arranged between the first tension-breaking roller and the rolling roller, the first tension-measuring roller comprising a first tension-measuring portion and a second tension-measuring portion spaced apart in its axial direction; the electrode comprising a first edge and a second edge oppositely arranged in its width direction, the first tension-measuring portion and the second tension-measuring portion respectively measuring the tension at the first edge and the second edge; a first adjusting roller, arranged between the first tension-breaking roller and the rolling roller, the first adjusting roller comprising a first adjusting roller body and a first driving portion, the first driving portion responding to the first tension-measuring portion and the second tension-measuring portion to adjust the relative heights of the two ends of the first adjusting roller body to adjust the acting force between the first adjusting roller and the electrode.

[0007] In some embodiments, the first tension measuring roller includes a first measuring roller and a second measuring roller, and the first measuring roller and the second measuring roller are spaced apart in the axial direction of the first tension measuring roller;

[0008] The first measuring roller is used to contact and cooperate with the first edge of the pole piece to form a first tension measuring portion;

[0009] The second measuring roller is used to contact and cooperate with the second edge of the pole piece to form a second tension measuring portion.

[0010] In some embodiments, the first tension barrier roller includes a first tension roller and a second tension roller that are oppositely disposed, and a first extrusion gap is formed between the first tension roller and the second tension roller.

[0011] In some embodiments, the first driving portion includes a first driving member and a second driving member;

[0012] The first driving member is provided at the first end of the first adjusting roller body and is drivingly engaged with the first end of the first adjusting roller body;

[0013] The second driving member is arranged at the second end of the first adjusting roller body and is drivingly matched with the second end of the first adjusting roller body.

[0014] In some embodiments, the rolling device further comprises: a second tension-break roller disposed downstream of the roller, the second tension-break roller comprising a third extrusion gap for the electrode sheet to pass through;

[0015] a second tension measuring roller disposed between the nip roller and the second tension interrupting roller, the second tension measuring roller including a third tension measuring portion and a fourth tension measuring portion spaced apart in an axial direction thereof; the third tension measuring portion and the fourth tension measuring portion respectively measuring tension at the first edge and the second edge;

[0016] The second adjusting roller is arranged between the rolling roller and the second tension measuring roller. The second adjusting roller includes a second adjusting roller body and a second driving part. The second driving part responds to the third tension measuring part and the fourth tension measuring part to adjust the relative height of the two ends of the second adjusting roller body to adjust the force between the second adjusting roller and the pole piece.

[0017] In some embodiments, the rolling device also includes: a first floating roller, arranged between the first tension isolation roller and the first tension measuring roller, the first floating roller including a first floating roller body and a third driving unit; the third driving unit responds to the first tension measuring unit and / or the second tension measuring unit to adjust the vertical height of the first floating roller body.

[0018] In some embodiments, the rolling device also includes: a second floating roller, arranged between the second tension measuring roller and the second tension isolation roller, the second floating roller including a second floating roller body and a fourth driving unit; the fourth driving unit responds to the third tension measuring unit and / or the fourth tension measuring unit to adjust the vertical height of the second floating roller body.

[0019] In some embodiments, the rolling device further includes: a thickness gauge, disposed downstream of the second tension-isolating roller, and the thickness gauge is used to measure the thickness of the pole piece.

[0020] In some embodiments, the rolling device further comprises:

[0021] The third tension-isolating roller is arranged downstream of the second tension-isolating roller, and the thickness gauge is arranged between the second tension-isolating roller and the third tension-isolating roller.

[0022] In some embodiments, the second tension measuring roller includes a third measuring roller and a fourth measuring roller, and the third measuring roller and the fourth measuring roller are spaced apart in the axial direction of the second tension measuring roller;

[0023] The second measuring roller is used to contact and cooperate with the first edge of the pole piece to form a third tension measuring portion;

[0024] The second measuring roller is used to contact and cooperate with the second edge of the pole piece to form a fourth tension measuring portion;

[0025] And / or, the second tension barrier roller includes a third tension roller and a fourth tension roller, and a third extrusion gap is formed between the third tension roller and the fourth tension roller;

[0026] And / or, the second driving part includes a third driving member and a fourth driving member; the third driving member is arranged at the first end of the second adjusting roller body, and is driven to cooperate with the first end of the second adjusting roller body; the fourth driving member is arranged at the second end of the second adjusting roller body, and is driven to cooperate with the second end of the second adjusting roller body.

[0027] In some embodiments, the rolling device also includes: an unwinding mechanism, rotatably arranged upstream of the first tension barrier roller, the unwinding mechanism being used to wind up the pole piece and release it downstream; and / or, the rolling device also includes a winding mechanism, rotatably arranged at the far downstream of the rolling device, the winding mechanism being used to wind up the pole piece.

[0028] The rolling device for the battery electrode provided in the present application includes a first tension measuring roller, a first tension adjusting roller and a rolling roller. The first tension measuring roller and the first tension adjusting roller are both arranged upstream of the rolling roller. The first tension measuring roller can measure the tension at the two edges of the electrode before the electrode enters the rolling roller, and then adjust the relative height of the two edges of the electrode through the first adjusting roller to reduce the tension difference at the two edges of the electrode, thereby ensuring the uniformity of the tension at the edges on both sides of the electrode entering the rolling roller, thereby reducing the risk of one side of the electrode breaking during rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 A schematic structural diagram of a rolling device for a battery electrode provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of a partial structure of a roller pressing device;

[0032] Figure 3 A schematic structural diagram of a first tension measuring roller of a rolling device for a battery electrode provided in an embodiment of the present application;

[0033] Figure 4 A schematic structural diagram of a first tension-isolating roller of a rolling device for a battery electrode provided in an embodiment of the present application;

[0034] Figure 5 A schematic structural diagram of the first adjustment roller of the rolling device for the battery electrode provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 10. Roller pressing device;

[0037] 101, first tension interval; 102, second tension interval; 103, third tension interval;

[0038] 110, first tension-breaking roller; 111, first tension-breaking roller; 112, second tension-breaking roller; 120, second tension-breaking roller; 130, third tension-breaking roller;

[0039] 200, roller;

[0040] 310, first tension measuring roller; 311, first tension measuring unit; 312, second tension measuring unit; 320, second tension measuring roller;

[0041] 410, first adjusting roller; 411, first adjusting roller body; 412, first driving unit; 4121, first driving member; 4122, second driving member; 420, second adjusting roller;

[0042] 510, first floating roller; 520, second floating roller;

[0043] 600, thickness gauge;

[0044] 700, unwinding mechanism;

[0045] 800, winding mechanism;

[0046] 900, pole piece. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely 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.

[0048] The battery electrode sheet roller pressing device is a key piece of equipment in the lithium-ion battery manufacturing process. It is primarily used to compact the coated electrode sheets. The purpose of roller pressing is to mechanically rearrange the active material particles in the electrode sheet, increasing the contact density between the particles and thus optimizing the electrode's electrochemical performance. Roll pressing also improves the electrode's pore structure, reduces dead volume, and increases the battery's energy density and power output. Furthermore, the roller pressing process helps remove air bubbles and excess binder from the electrode sheet, ensuring uniformity and consistency.

[0049] Current battery electrode sheet rolling equipment consists of an unwinding mechanism, a floating roller, a nip roller, and a rewinding mechanism, arranged in order from upstream to downstream. The nip roller is the primary pressing mechanism and generally consists of upper and lower rollers. The electrode sheet passes through the rollers and is compacted to form a compact structure. The floating roller can be positioned upstream or downstream of the nip rollers, and its height can be adjusted up and down to ensure the electrode sheet maintains a predetermined tension.

[0050] The floating roller located upstream of the roller is generally called the inlet floating roller, and the floating roller located downstream of the roller is called the outlet floating roller. The inlet floating roller can support the electrode piece. At the same time, by adjusting the inlet floating roller, the electrode piece can enter the roller with a predetermined tension, so that the electrode piece entering the roller is in a flat and straight state, thereby ensuring the roller pressing effect.

[0051] Since the current collector of the electrode sheet is ductile, the electrode sheet will be further extended after rolling. At this time, the outlet floating roller set downstream of the roller can adjust its height to ensure the tension of the electrode sheet, thereby further ensuring the effect of rolling.

[0052] However, the height of the current import floating roller and the export floating roller can only be adjusted as a whole. However, before the electrode enters the rolling roller, the tension at the two edges in the width direction may be different, resulting in inconsistent tension at the two edges of the electrode when the roller is rolling. The edge on the side with greater tension is prone to breakage after rolling, affecting the processing quality of the electrode.

[0053] In view of this, the present application provides a rolling device for battery pole pieces, which includes a first tension measuring roller, a first tension adjusting roller and a rolling roller. The first tension measuring roller and the first tension adjusting roller are both arranged upstream of the rolling roller. The first tension measuring roller can measure the tension at the two edges of the pole piece before the pole piece enters the rolling roller, and then adjust the relative height of the two edges of the pole piece through the first adjusting roller to reduce the tension difference at the two edges of the pole piece, thereby ensuring the uniformity of the tension at the edges on both sides of the pole piece entering the rolling roller, thereby reducing the risk of one side of the pole piece breaking during rolling.

[0054] The specific structure of the battery electrode rolling device is described below with reference to the figure.

[0055] It should be noted that the battery electrodes provided in the embodiments of the present application can be used to process batteries, and the batteries can be secondary batteries, that is, the batteries can be charged and discharged and recycled. The specific types of batteries may include but are not limited to lithium batteries, etc., and the scenarios in which the batteries can be used include but are not limited to electronic products, energy storage equipment, vehicles, etc., such as mobile communication equipment, new energy vehicles, drones, etc., and the embodiments of the present application do not make specific limitations on this.

[0056] Figure 1 A schematic structural diagram of a rolling device for a battery electrode provided in an embodiment of the present application.

[0057] like Figure 1 As shown, the rolling device 10 of the battery electrode sheet 900 according to the embodiment of the present application includes: a first tension isolation roller 110 , a roller 200 , a first tension measuring roller 310 and a first adjustment roller 410 .

[0058] The first tension-breaking roller 110 includes a first extrusion gap for the electrode sheet 900 to pass through, and the roller 200 is disposed downstream of the first tension-breaking roller 110. The roller 200 has a second extrusion gap for the electrode sheet 900 to pass through. Both the first tension-breaking roller 110 and the roller 200 can function as tension breakers. That is, by tightly squeezing the electrode sheet 900, a first tension interval 101 is formed between the first tension-breaking roller 110 and the roller 200. Within this first tension interval 101, the tension of the electrode sheet 900 can be adjusted by the roller body, so that the electrode sheet 900 within the first interval has a uniform tension.

[0059] Specifically, a first tension measuring roller 310 and a first adjusting roller 410 are sequentially disposed between the first tension interrupting roller 110 and the nip roller 200 in a direction from upstream to downstream.

[0060] The first tension measuring roller 310 includes a first tension measuring portion 311 and a second tension measuring portion 312 spaced apart in its axial direction; the pole piece 900 includes a first edge and a second edge oppositely arranged in its width direction, the first tension measuring portion 311 can measure the tension at the first edge of the pole piece 900, and the second tension measuring portion 312 can measure the tension at the second edge of the pole piece 900.

[0061] The first adjusting roller 410 is arranged between the first tension isolation roller 110 and the rolling roller 200. The first adjusting roller 410 includes a first adjusting roller body 411 and a first driving part 412. The first driving part 412 responds to the measurement results of the first tension measuring part 311 and the second tension measuring part 312, thereby adjusting the relative heights of the two ends of the first adjusting roller body 411, and then adjusting the force between the second adjusting roller 420 and the pole piece 900 to improve the consistency of the tension at the two edges of the pole piece 900.

[0062] For example, the measurement value of the first tension measuring unit 311 is F1, and the measurement value of the second tension measuring unit 312 is F2. When the difference between F1 and F2 is greater than a predetermined range, it indicates that the tension at the first edge of the pole piece 900 is greater than the tension at the second edge. At this time, the first driving unit 412 can receive the measurement data of the first tension measuring unit 311 and the second tension measuring unit 312, and balance the tension at the two edges of the pole piece 900 by driving one end of the first adjustment roller 410 to rise or fall, thereby improving the consistency of the tension at the two edges of the pole piece 900. Given that the tension at the two edges of the pole piece 900 entering the roller 200 is highly consistent, the pole piece 900 entering the roller 200 can be evenly compressed, reducing the probability of the edge of the pole piece 900 breaking.

[0063] Furthermore, if Figure 2 As shown, in some embodiments, the first tension measuring roller 310 includes a first measuring roller and a second measuring roller, and the first measuring roller and the second measuring roller are spaced apart in the axial direction of the first tension measuring roller 310, and the first edge of the pole piece 900 is in contact with the first measuring roller, and the second edge of the pole piece 900 is in contact with the second measuring roller.

[0064] In the above structure, the first measuring roller and the second measuring roller form the first tension measuring part 311 and the second tension measuring part 312 respectively. When the battery pole piece 900 passes through the first measuring roller and the second measuring roller, the two edges of the pole piece 900 contact the two measuring rollers respectively. At this time, the pole piece 900 can apply a certain tension to the first measuring roller and the second measuring roller. By detecting the interaction force between the first measuring roller and the second measuring roller and the pole piece 900, the tension at the two edges of the pole piece 900 can be calculated.

[0065] Therefore, the first tension measuring roller 310 can calculate the tension value at the second edge of the pole piece 900 as the pole piece 900 passes through, thereby ensuring smooth processing of the pole piece 900 .

[0066] It should also be noted that the first tension measurement roller 310 can be composed of multiple rollers mounted on a common axis and in contact with the passing battery electrode sheet 900. A first measuring roller and a second measuring roller, rollers with tension measurement functions, are mounted on the first tension measurement roller 310. A support roller may also be installed between the first and second measuring rollers to support the electrode sheet 900. Alternatively, in other embodiments, one or more measuring rollers may be installed between the first and second measuring rollers to more comprehensively detect the tension at various locations on the electrode sheet 900.

[0067] Furthermore, if Figure 3 As shown, in some embodiments, the first tension barrier roller 110 includes a first tension roller 111 and a second tension roller 112 , and a first extrusion gap is formed between the first tension roller 111 and the second tension roller 112 .

[0068] Specifically, the first tension-isolating roller 110 controls the tension distribution during the processing of the electrode piece 900, ensuring that the electrode piece 900 has uniform tension as it passes through the processing equipment. The first extrusion gap formed between the first tension roller 111 and the second tension roller 112 can be used to isolate the front and rear tensions of the material and cooperate with the roller 200 to form the first tension zone 101.

[0069] Further, as shown in Figure 4, in some embodiments, the first driving part 412 includes a first driving member 4121 and a second driving member 4122; the first driving member 4121 is arranged at the first end of the first adjusting roller body 411, and is driven to cooperate with the first end of the first adjusting roller body 411; the second driving member 4122 is arranged at the second end of the first adjusting roller body 411, and is driven to cooperate with the second end of the first adjusting roller body 411.

[0070] In the above structure, the first drive unit 412 includes two drive members, which can enhance the flexibility of adjusting the first adjustment roller 411. For example, driven by the first drive member 4121 and the second drive member 4122, the first adjustment roller 411 can be raised as a whole, lowered as a whole, raised as a whole while one end is raised or lowered, and lowered as a whole while one end is raised or lowered, thereby better balancing the tension on both sides of the pole piece 900.

[0071] Specifically, the first driving member 4121 can respond to the measurement values of the first and second measuring rollers and adjust the first end of the first adjusting roller body 411 to rise and fall according to the measurement values, thereby balancing the tension values at the two edges of the pole piece 900. Correspondingly, the second driving member 4122 can also respond to the measurement values of the first and second measuring rollers and adjust the second end of the first adjusting roller body 411 to rise and fall according to the measurement values, thereby balancing the tension values at the two edges of the pole piece 900.

[0072] For example, when the difference between the measured value F1 of the first tension measuring part 311 and the measured value F2 of the second tension measuring part 312 is greater than a predetermined range, it indicates that the tension at the first edge of the pole piece 900 is greater than the tension at the second edge. At this time, the first driving part 412 can receive the measurement data of the first tension measuring part 311 and the second tension measuring part 312, and reduce the tension at the first edge of the pole piece 900 by lowering the height of the first end of the first adjustment roller body 411.

[0073] Alternatively, in some embodiments, the tension at the second edge of the pole piece 900 may be increased by raising the height of the second end of the first adjustment roller 411 .

[0074] Alternatively, in some embodiments, the first driving member 4121 and the second driving member 4122 may be operated simultaneously to achieve balanced adjustment of the tension of the pole piece 900 .

[0075] Furthermore, if Figure 1 and Figure 2 As shown, the rolling device 10 further includes: a second tension interrupting roller 120 , a second tension measuring roller 320 and a second adjusting roller 420 .

[0076] The second tension-breaking roller 120 is disposed downstream of the roller 200 and includes a third extrusion gap through which the electrode piece 900 passes. Both the roller 200 and the second tension-breaking roller 120 can function as tension breakers. Specifically, by tightly squeezing the electrode piece 900, a second tension interval 102 is formed between the roller 200 and the second tension-breaking roller 120. Within this second tension interval 102, the tension of the electrode piece 900 can be adjusted by the roller body, ensuring that the electrode piece 900 within the first interval has a uniform tension.

[0077] Specifically, a second adjustment roller 420 and a second tension measuring roller 320 are sequentially provided between the roller 200 and the second tension interrupting roller 120 in the direction from upstream to downstream.

[0078] The second tension measuring roller 320 can measure the tension at the two edges of the pole piece 900 after rolling. The second tension measuring roller 320 includes a third tension measuring part and a fourth tension measuring part arranged at intervals in its axial direction; the third tension measuring part can measure the tension at the first edge of the pole piece 900, and the fourth tension measuring part can measure the tension at the second edge of the pole piece 900.

[0079] The second adjusting roller 420 is arranged between the rolling roller 200 and the second tension measuring roller 320. The second adjusting roller 420 includes a second adjusting roller body and a second driving part. The second driving part responds to the third tension measuring part and the fourth tension measuring part to adjust the relative height of the two ends of the second adjusting roller body.

[0080] The second adjusting roller 420 and the second tension measuring roller 320 can perform tension balance adjustment on the pole piece 900 downstream of the rolling roller 200, measure the tension difference at the two edges of the pole piece 900 through the second tension measuring roller 320, and balance the tension difference at both ends of the pole piece 900 through the second adjusting roller 420. Combined with the first tension measuring roller 310 and the first tension adjusting roller, the tension balance adjustment is performed on the pole piece 900 upstream of the rolling roller 200, so that the two edges of the pole piece 900 on the feed side and the discharge side of the rolling roller 200 have relatively balanced tension, thereby further improving the force uniformity of the pole piece 900 under the rolling pressure of the rolling roller 200, and further reducing the probability of the pole piece 900 breaking.

[0081] It should be noted that the measuring method of the second tension measuring roller 320 is similar to that of the first measuring roller, and the adjusting method of the second adjusting roller 420 is similar to that of the first adjusting roller 410 , which will not be described in detail in this embodiment.

[0082] Exemplarily, the second tension measuring roller 320 may include a third measuring roller and a fourth measuring roller, and the third measuring roller and the fourth measuring roller are spaced apart in the axial direction of the second tension measuring roller 320, the first edge of the pole piece 900 contacts and cooperates with the third measuring roller, and the second edge of the pole piece 900 contacts and cooperates with the fourth measuring roller, and the third measuring roller and the fourth measuring roller respectively form a third tension measuring part and a fourth tension measuring part.

[0083] The second tension barrier roller 120 may include a third tension roller and a fourth tension roller, and a third pressing gap is formed between the third tension roller and the fourth tension roller.

[0084] The second driving part includes a third driving member and a fourth driving member; the third driving member is arranged at the first end of the second adjusting roller body and is driven and cooperated with the first end of the second adjusting roller body; the fourth driving member is arranged at the second end of the second adjusting roller body and is driven and cooperated with the second end of the second adjusting roller body.

[0085] like Figure 1 and Figure 2 As shown, the rolling device 10 further includes a first floating roller 510, which is disposed between the first tension-breaking roller 110 and the first tension-measuring roller 310. That is, the first floating roller 510 is disposed within the first tension zone 101. The first floating roller 510 includes a first floating roller 510 body and a third driving unit. The third driving unit responds to the first tension-measuring unit 311 and / or the second tension-measuring unit 312 to adjust the vertical height of the first floating roller 510 body.

[0086] In the above structure, the first tension measuring unit 311 and the second tension measuring unit 312 can not only detect the tension values at the two edges of the pole piece 900, but also reflect the overall tension level of the pole piece 900 within the first tension range 101. When the overall tension level of the pole piece 900 within the first tension range 101 does not meet the processing requirements, the tension of the pole piece 900 can be adjusted by the first floating roller 510.

[0087] Accordingly, the rolling device 10 further includes a second floating roller 520, which is disposed between the second tension measuring roller 320 and the second tension interrupting roller 120. Specifically, the second floating roller 520 is disposed within the second tension zone 102. The second floating roller 520 includes a second floating roller body and a fourth drive unit. The fourth drive unit is responsive to the third tension measuring unit and / or the fourth tension measuring unit to adjust the vertical height of the second floating roller body. If the overall tension level of the pole piece 900 within the second tension zone 102 does not meet processing requirements, the second floating roller 520 can be used to adjust the tension of the pole piece 900.

[0088] like Figure 1 As shown, in some embodiments, the rolling device 10 also includes a thickness gauge 600, which is arranged downstream of the second tension isolation roller 120. The thickness gauge 600 can measure the thickness of the pole piece 900, so that the operator can know the thickness parameters of the pole piece 900 immediately.

[0089] Exemplarily, the thickness gauge 600 may be a laser thickness gauge 600 .

[0090] In addition, if Figure 1 As shown, in some embodiments, the rolling device 10 further includes a third tension-breaking roller 130 , which is disposed downstream of the second tension-breaking roller 120 , and the thickness gauge 600 is disposed between the second tension-breaking roller 120 and the third tension-breaking roller 130 .

[0091] A third tension interval 103 can be formed between the second tension isolation roller 120 and the third tension isolation roller 130. The pole piece 900 located in the third tension interval 103 presents a uniform tension level. The thickness gauge 600 is set in the third tension interval 103 to improve the accuracy of thickness measurement.

[0092] In some embodiments, the rolling device 10 further includes an unwinding mechanism 700 and a rewinding mechanism 800 .

[0093] Specifically, the unwinding mechanism 700 is rotatably arranged upstream of the first tension-breaking roller 110. The unwinding mechanism 700 is used to wind the pole piece 900 and release the pole piece 900 downstream, thereby providing a continuous supply of pole pieces 900 to the rolling device 10, ensuring that the pole piece 900 has appropriate initial tension and speed before entering the first tension-breaking roller 110.

[0094] The rewinding mechanism 800 is rotatably disposed at the farthest downstream of the rolling device 10. The unwinding mechanism 700 is used to rewind the electrode sheet 900, thereby neatly winding the processed electrode sheet 900 for subsequent storage and transportation. The rewinding mechanism 800 is also rotatable and can adjust the winding speed and tension according to the thickness and width of the electrode sheet 900, ensuring that the electrode sheet 900 is tightly wound and free of damage.

[0095] The coordinated operation of the unwinding mechanism 700 and the rewinding mechanism 800 ensures continuity and consistency throughout the entire process of unwinding and rewinding the electrode 900, reducing production losses due to downtime or tension fluctuations. By precisely controlling the tension and speed of unwinding and rewinding, deformation and damage of the electrode 900 during processing can be minimized, improving overall product quality.

[0096] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0097] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0098] The terms "first," "second," "third," "fourth," and so forth (if any) in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the application described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0099] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0100] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, ordinary technicians in this field should understand that they can still modify the technical solutions described in the aforementioned implementation modes, 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 implementation modes of the present application.

Claims

1. A rolling device for battery pole pieces, characterized in that: include: A first tension isolation roller (110) comprising a first extrusion gap for the electrode piece (900) to pass through; a roller (200) disposed downstream of the first tension-breaking roller (110), the roller (200) having a second extrusion gap for the electrode (900) to pass through; a first tension measuring roller (310) disposed between the first tension interrupting roller (110) and the rolling roller (200), the first tension measuring roller (310) comprising a first tension measuring portion (311) and a second tension measuring portion (312) spaced apart in an axial direction thereof; the pole piece (900) comprising a first edge and a second edge disposed opposite to each other in a width direction thereof, the first tension measuring portion (311) and the second tension measuring portion (312) respectively measuring tension at the first edge and the second edge; The first adjusting roller (410) is arranged between the first tension isolation roller (110) and the rolling roller (200), and the first adjusting roller (410) includes a first adjusting roller body (411) and a first driving part (412). The first driving part (412) responds to the first tension measuring part (311) and the second tension measuring part (312) to adjust the relative heights of the two ends of the first adjusting roller body (411) to adjust the force between the first adjusting roller (410) and the pole piece (900).

2. The battery pole sheet rolling device according to claim 1, characterized in that: The first tension measuring roller (310) comprises a first measuring roller and a second measuring roller, wherein the first measuring roller and the second measuring roller are arranged at intervals in the axial direction of the first tension measuring roller (310); The first measuring roller is used to contact and cooperate with the first edge of the pole piece (900) to form the first tension measuring portion (311); The second measuring roller is used to contact and cooperate with the second edge of the pole piece (900) to form the second tension measuring portion (312).

3. The battery pole sheet rolling device according to claim 1, characterized in that: The first tension isolation roller (110) comprises a first tension roller (111) and a second tension roller (112) which are arranged opposite to each other, and a first extrusion gap is formed between the first tension roller (111) and the second tension roller (112).

4. The battery pole sheet rolling device according to claim 1, characterized in that: The first driving portion (412) comprises a first driving member (4121) and a second driving member (4122); The first driving member (4121) is provided at the first end of the first adjusting roller body (411) and is drivingly engaged with the first end of the first adjusting roller body (411); The second driving member (4122) is arranged at the second end of the first adjusting roller body (411) and is drivingly engaged with the second end of the first adjusting roller body (411).

5. The battery pole sheet rolling device according to any one of claims 1 to 4, characterized in that: The rolling device (10) further comprises: a second tension-isolating roller (120) disposed downstream of the roller (200), the second tension-isolating roller (120) comprising a third extrusion gap for the electrode sheet (900) to pass through; a second tension measuring roller (320) disposed between the rolling roller (200) and the second tension interrupting roller (120), the second tension measuring roller (320) comprising a third tension measuring portion and a fourth tension measuring portion spaced apart in an axial direction thereof; the third tension measuring portion and the fourth tension measuring portion respectively measuring the tension at the first edge and the second edge; The second adjusting roller (420) is arranged between the rolling roller (200) and the second tension measuring roller (320), and the second adjusting roller (420) includes a second adjusting roller body and a second driving part. The second driving part responds to the third tension measuring part and the fourth tension measuring part to adjust the relative heights of the two ends of the second adjusting roller body to adjust the force between the second adjusting roller (420) and the pole piece (900).

6. The battery pole sheet rolling device according to claim 1, characterized in that: The rolling device (10) further comprises: a first floating roller (510) disposed between the first tension interrupting roller (110) and the first tension measuring roller (310), the first floating roller (510) comprising a first floating roller (510) body and a third driving unit; The third driving portion is responsive to the first tension measuring portion (311) and / or the second tension measuring portion (312) to adjust the vertical height of the first floating roller (510) body.

7. The battery pole sheet rolling device according to claim 5, characterized in that: The rolling device (10) further comprises: a second floating roller (520) disposed between the second tension measuring roller (320) and the second tension interrupting roller (120), the second floating roller (520) comprising a second floating roller body and a fourth driving portion; The fourth driving portion is responsive to the third tension measuring portion and / or the fourth tension measuring portion to adjust the vertical height of the second floating roller (520) body.

8. The battery pole sheet rolling device according to claim 5, characterized in that: The rolling device (10) further comprises: A thickness gauge (600) is provided downstream of the second tension isolation roller (120), and the thickness gauge (600) is used to measure the thickness of the pole piece (900).

9. The battery pole sheet rolling device according to claim 8, characterized in that: The rolling device (10) further comprises: The third tension-isolating roller (130) is arranged downstream of the second tension-isolating roller (120), and the thickness gauge (600) is arranged between the second tension-isolating roller (120) and the third tension-isolating roller (130).

10. The battery pole sheet rolling device according to claim 5, characterized in that: The second tension measuring roller (320) comprises a third measuring roller and a fourth measuring roller, wherein the third measuring roller and the fourth measuring roller are arranged at intervals in the axial direction of the second tension measuring roller (320); The second measuring roller is used to contact and cooperate with the first edge of the pole piece (900) and form the third tension measuring portion; The second measuring roller is used to contact and cooperate with the second edge of the pole piece (900) to form the fourth tension measuring portion; And / or, the second tension isolation roller (120) comprises a third tension roller and a fourth tension roller, and a third extrusion gap is formed between the third tension roller and the fourth tension roller; And / or, the second driving part includes a third driving member and a fourth driving member; the third driving member is arranged at the first end of the second adjusting roller (420) body, and is driven to cooperate with the first end of the second adjusting roller (420) body; the fourth driving member is arranged at the second end of the second adjusting roller (420) body, and is driven to cooperate with the second end of the second adjusting roller (420) body.

11. The battery pole sheet rolling device according to claim 5, characterized in that: The rolling device (10) further comprises: an unwinding mechanism (700) rotatably disposed upstream of the first tension-isolating roller (110), the unwinding mechanism (700) being used to wind the pole piece (900) and release the pole piece (900) downstream; and / or, The rolling device (10) further comprises a winding mechanism (800) rotatably arranged at the most downstream of the rolling device (10), the winding mechanism (800) being used to wind up the pole piece (900).

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