Cutting device and pole piece manufacturing equipment

Abstract

The utility model discloses a cutting device and pole piece manufacturing equipment, and belongs to the technical field of cutting machining, the cutting device is used for cutting a workpiece, and the cutting device comprises a cutting mechanism and a first limiting piece. The cutting mechanism is used for providing a laser beam extending in the first direction. The laser beam is located on one side of the first limiting piece in the second direction, the first limiting piece abuts against the workpiece in the first direction, and the first direction is perpendicular to the second direction; the cutting device further comprises a negative pressure mechanism, the first limiting piece is provided with a first side facing the laser beam in the second direction, the first side is provided with a dust suction opening, the negative pressure mechanism is connected with the dust suction opening, and the negative pressure mechanism is used for providing negative pressure. According to the cutting device of the structure, the risk that the machining quality of the cutting device is reduced due to the fact that cutting residues block laser beams can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting processing, in particular to a cutting device and a pole piece manufacturing equipment. BACKGROUND

[0002] When a workpiece is cut by a laser beam, cutting residues are usually generated. The cutting residues are adhered to a limiting piece in a cutting device for limiting the workpiece, and the cutting residues accumulated in the cutting device for a long time block the laser beam, thereby causing the processing quality of the cutting device to decrease. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a cutting device and a pole piece manufacturing equipment to reduce the risk that the cutting residues block the laser beam and cause the processing quality of the cutting device to decrease.

[0004] In a first aspect, embodiments of the present application provide a cutting device for cutting a workpiece, the cutting device comprising a cutting mechanism and a first limiting piece. The cutting mechanism is configured to provide a laser beam extending along a first direction; the laser beam is located on one side of the first limiting piece in a second direction, the first limiting piece abuts the workpiece along the first direction, and the first direction is perpendicular to the second direction; wherein the cutting device further comprises a negative pressure mechanism, the first limiting piece has a first side facing the laser beam in the second direction, the first side has a dust suction port, the negative pressure mechanism is connected with the dust suction port, and the negative pressure mechanism is configured to provide a negative pressure.

[0005] In the above technical solution, the negative pressure mechanism provides a negative pressure to the dust suction port to drive the air near the dust suction port to move away from the first side of the first limiting piece, so as to form a suction force on the surface of the first side to drive the cutting residues to move close to the dust suction port and be collected, thereby reducing the risk that the cutting residues adhere to the first side of the first limiting piece and block the laser beam, causing the processing quality of the cutting device to decrease.

[0006] In some embodiments, the first limiting piece has a second side in the first direction, the second side is configured to abut the workpiece, and the dust suction port extends to the second side.

[0007] In the above technical solution, the dust suction port extends to the second side. On the one hand, this increases the size of the dust suction port in the first direction, thereby increasing the area of ​​the dust suction port while keeping its size in the third direction constant. This increases the range within which the dust suction port can adsorb cutting residue, further reducing the risk of cutting residue adhering to the first side of the first limiting member and blocking the laser beam, thus reducing the processing quality of the cutting device. The third direction, the first direction, and the second direction are perpendicular to each other. On the other hand, since the dust suction port extends to the second side, the second side can be used as a processing reference surface when processing the dust suction port. This facilitates machining the second side to obtain the dust suction port, thereby reducing the processing difficulty of the first limiting member and reducing the manufacturing cost of the cutting device.

[0008] In some embodiments, the first limiting member has a first cavity, the dust suction port is connected to the first cavity, and the negative pressure mechanism is connected to the first cavity.

[0009] In the above technical solution, the first limiting member has a first cavity, and the negative pressure mechanism is connected to the suction port through the first cavity. On the one hand, when the suction port adsorbs the cutting residue, the first cavity can uniformly distribute the negative pressure provided by the negative pressure mechanism, thereby making the adsorption force in each area of ​​the suction port similar, reducing the risk of cutting residue sticking to the first side of the first limiting member due to weak adsorption force in some areas of the suction port. On the other hand, the first cavity can serve as a temporary storage space for cutting residue, so as to facilitate the collection of cutting residue.

[0010] In some embodiments, the first limiting member has a second side in a first direction, the second side being used to abut against the workpiece, the second side having an adsorption hole, and the negative pressure mechanism being connected to the adsorption hole.

[0011] In the above technical solution, the second side has an adsorption hole, and the negative pressure mechanism is connected to the adsorption hole. The negative pressure mechanism provides negative pressure to the adsorption hole so that the end of the adsorption hole located on the second side is under negative pressure. When the cutting mechanism provides a laser beam extending along the first direction to cut the workpiece, the workpiece will be driven closer to the second side by the adsorption force generated by the negative pressure at the end of the adsorption hole located on the second side. This makes the workpiece fit with the second side of the first limiting member along the first direction, reducing the risk of the cutting device's processing quality decreasing due to the workpiece's movement in the first direction causing the laser beam's focus not to coincide with the workpiece.

[0012] In some embodiments, the workpiece is an electrode sheet, the electrode sheet includes a current collector and an active material layer, the current collector has the active material layer disposed on at least one side in its thickness direction and abuts against the second side, and the radial dimension of the adsorption hole is D, which satisfies 0.8mm≤D≤1.2mm.

[0013] In the above technical solution, on the one hand, when D≥0.8mm, the adsorption pores have a certain radial dimension, thereby reducing the risk of the adsorption force on the second side being reduced due to the powder of the active material layer blocking the adsorption pores; on the other hand, when the number of adsorption pores and the area of ​​the second side are fixed, when D≤1.2mm, the area of ​​the second side used to support the electrode can be increased, thereby reducing the risk of the electrode being deformed by the adsorption force generated by the negative pressure of the adsorption pores; therefore, when 0.8mm≤D≤1.2mm, it can reduce both the risk of the adsorption force on the second side being reduced due to the powder of the active material layer blocking the adsorption pores and the risk of the electrode being deformed by the adsorption force generated by the negative pressure of the adsorption pores.

[0014] In some embodiments, the cutting mechanism further includes a second limiting member; the second limiting member and the first limiting member are spaced apart along the first direction, and the second limiting member and the first limiting member respectively abut against the two sides of the workpiece that are opposite to each other in the first direction.

[0015] In the above technical solution, the second limiting member and the first limiting member respectively abut against the two sides of the workpiece that are opposite to each other in the first direction, so that the second limiting member and the first limiting member can restrict the movement of the workpiece in the first direction. Thus, when the cutting mechanism provides a laser beam extending in the first direction to cut the workpiece, the risk of the processing quality of the cutting device being reduced due to the workpiece moving in the first direction causing the focus of the laser beam to not coincide with the workpiece.

[0016] In some embodiments, the second limiting member is a roller.

[0017] In the above technical solution, the second limiting member is a roller, so that when the workpiece moves relative to the second limiting member, the second limiting member can follow the movement of the workpiece to rotate, thereby reducing the risk of the second limiting member scratching the surface of the workpiece.

[0018] In some embodiments, the cutting mechanism further includes a third limiting member; along the second direction, there is a gap between the first limiting member and the third limiting member for the laser beam to pass through; the third limiting member abuts against the workpiece along the first direction.

[0019] In the above technical solution, by setting the third limiting member to be located on opposite sides of the laser beam in the second direction, and setting the third limiting member to abut against the workpiece in the first direction, the third limiting member restricts the movement of the part of the workpiece located on the side of the laser beam away from the first limiting member in the second direction in the first direction when the cutting mechanism cuts the workpiece. This reduces the risk of the cutting device's processing quality being reduced due to the workpiece's movement in the first direction causing the laser beam's focus not to coincide with the workpiece.

[0020] In some embodiments, the third limiting member is a conveyor belt that extends along the second direction and is used to drive the workpiece away from the first limiting member along the second direction.

[0021] In the above technical solution, by setting the third limiting member to include a conveyor belt, the third limiting member can drive the area of ​​the workpiece after cutting to continue moving along the second direction, thereby facilitating continuous cutting of the workpiece and thus improving the cutting efficiency of the cutting device.

[0022] In some embodiments, the third limiting member includes at least two rollers and a conveyor belt; the at least two rollers are spaced apart along a second direction; the conveyor belt is sleeved over the at least two rollers, and the at least two rollers rotate to cause the conveyor belt to drive the workpiece away from the first limiting member along the second direction; wherein the conveyor belt has a connecting hole, and the two ends of the connecting hole are respectively disposed on the inner surface of the conveyor belt and the outer surface of the conveyor belt.

[0023] In the above technical solution, the two ends of the connecting hole are respectively set on the inner surface and the outer surface of the conveyor belt. On the one hand, this facilitates the removal of dust and cutting residue carried by the workpiece falling into the conveyor belt through the connecting hole from the inner surface of the conveyor belt, thereby reducing the risk of dust and cutting residue accumulating on the inner surface of the conveyor belt and causing the conveyor belt to slip. On the other hand, compared with setting multiple conveyor belts spaced apart along a third direction and setting gaps between multiple conveyor belts, by setting the two ends of the connecting hole on the inner surface and the outer surface of the conveyor belt respectively, so that dust and cutting residue carried by the workpiece can be removed from the inner surface of the conveyor belt through the connecting hole, the integrity of the conveyor belt can be increased and the structural strength of the conveyor belt can be increased.

[0024] In some embodiments, the workpiece is an electrode sheet, the electrode sheet includes a current collector and an active material layer, the current collector has the active material layer disposed on at least one side in its thickness direction, and the first limiting member abuts against the active material layer along a first direction.

[0025] In the above technical solution, the first limiting member abuts against the active material layer along the first direction, thereby realizing the structural limiting of the electrode sheet in the first direction, so as to facilitate the cutting device to cut the electrode sheet.

[0026] Secondly, embodiments of this application provide an electrode manufacturing apparatus including the cutting device provided in any embodiment of the first aspect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the cutting device provided in some embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the structure of another cutting device provided in some embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the first limiting member provided in some embodiments of this application;

[0031] Figure 4 for Figure 3 Sectional view of AA;

[0032] Figure 5 This is a schematic diagram of the structure of another cutting device provided in some embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the structure of another cutting device provided in some embodiments of this application;

[0034] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0035] Icon: 100 - Cutting device;

[0036] 10-Cutting mechanism; 11-Laser beam;

[0037] 20-First limiting member; 20A-End cap; 20B-Housing shell; 201-First cavity; 21-First side; 211-Dust suction port; 212-Groove; 22-Second side; 221-Suction hole;

[0038] 30-Rack; 301-Placement space; 31-Support rod; 32-Mounting frame;

[0039] 40 - Second limiting component; 41 - Fourth limiting component;

[0040] 50 - Third limiting component; 51 - Conveyor belt; 511 - Connecting hole; 52 - Roller; 53 - Drive motor; 54 - Mounting bracket;

[0041] 60 - Guide roller;

[0042] 200 - Workpiece; 210 - Electrode; 210A - Current collector; 210B - Active material layer;

[0043] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0046] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0050] In this application, "multiple" means two or more (including two).

[0051] When machining the appearance of a workpiece, excess parts can be removed using a cutting device to ensure the workpiece's appearance meets usage requirements. In the process of cutting the workpiece, in addition to considering processing efficiency, the processing quality is also an issue that cannot be ignored.

[0052] Taking the workpiece as an electrode as an example, the electrode includes a current collector and an active material layer. The current collector has an active material layer on at least one side in its thickness direction. Along the width direction of the electrode, the current collector has a coated area with the active material layer and an uncoated area without the active material layer. Tabs are cut into the uncoated current collector, enabling the charging and discharging of the electrode assembly formed by the electrode. The current collector can be a metal foil, such as copper foil or aluminum foil. The manufacturing process of the electrode includes a die-cutting process and a slitting process. The die-cutting process involves cutting tabs into the electrode using a cutting device. The slitting process involves using a cutting device to cut and shape the electrode along its width direction, near the coated area.

[0053] During the electrode cutting process, the laser beam heats the current collector to melt part of it, achieving the cutting effect. This melted current collector forms splattered cutting residue. This residue cools rapidly upon contact with the workpiece-limiting components in the cutting device and adheres to them. Over time, this accumulated residue blocks the laser beam, causing it to be obstructed before focusing. This reduces the laser beam's energy and consequently lowers the processing quality.

[0054] Based on the above considerations, this application provides a cutting device for cutting a workpiece. The cutting device includes a cutting mechanism and a first limiting member. The cutting mechanism is used to provide a laser beam extending along a first direction; the laser beam is located on one side of the first limiting member in a second direction, and the first limiting member abuts against the workpiece along the first direction, which is perpendicular to the second direction; wherein, the cutting device further includes a negative pressure mechanism, the first limiting member has a first side facing the laser beam in the second direction, the first side has a dust suction port, the negative pressure mechanism is connected to the dust suction port, and the negative pressure mechanism is used to provide negative pressure.

[0055] In this type of cutting device, by connecting the negative pressure mechanism to the dust suction port and providing negative pressure to the dust suction port through the negative pressure mechanism, the end of the dust suction port located on the first side is under negative pressure. When the cutting mechanism provides a laser beam extending along the first direction to cut the workpiece, the cutting residue will be driven towards the dust suction port and collected by the adsorption force generated by the negative pressure at the end of the dust suction port located on the first side. This reduces the risk that the cutting residue will stick to the first side of the first limiting member and block the laser beam, thus reducing the processing quality of the cutting device.

[0056] The cutting device is described in detail below with reference to the accompanying drawings.

[0057] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of the structure of two cutting devices 100 provided in some embodiments of this application. Embodiments of this application provide a cutting device 100 for cutting a workpiece 200. The cutting device 100 includes a cutting mechanism 10 and a first limiting member 20. The cutting mechanism 10 provides a laser beam 11 extending along a first direction X; the laser beam 11 is located on one side of the first limiting member 20 in a second direction Y, and the first limiting member 20 abuts against the workpiece 200 along the first direction X, which is perpendicular to the second direction Y; wherein, the cutting device 100 further includes a negative pressure mechanism (not shown in the figure), the first limiting member 20 having a first side 21 facing the laser beam 11 in the second direction Y, the first side 21 having a suction port 211, the negative pressure mechanism (not shown in the figure) being connected to the suction port 211, and the negative pressure mechanism (not shown in the figure) providing negative pressure.

[0058] The cutting mechanism 10 can be a laser cutting mechanism 10. The cutting mechanism 10 focuses the laser beam 11 onto the surface of the area of ​​the workpiece 200 that needs to be cut, so that the material is rapidly heated to the melting or vaporization point. The molten or vaporized material is blown away with the help of auxiliary gas, thereby achieving precise cutting.

[0059] For example, the laser cutting mechanism 10 includes a laser generating element and optical elements. The laser generating element may be a solid-state laser, a gas laser, or a fiber laser. These laser generating elements supply energy (such as electrical energy) to a special laser medium to generate a laser beam 11, and then focus the laser beam 11 onto a very small focal point using optical elements (such as lenses). The focused laser beam 11 produces an extremely high energy density, enabling it to provide sufficient heat to the surface of the area of ​​the workpiece 200 to be cut.

[0060] The first direction X and the second direction Y are two mutually perpendicular directions. The second direction Y can be the direction of movement of the workpiece 200 when it passes through the cutting device 100.

[0061] In some embodiments, the first direction X can be parallel to the direction of gravity, and the second direction Y can be a horizontal direction perpendicular to the direction of gravity.

[0062] In some embodiments, the second direction Y can be parallel to the direction of gravity, and the first direction X can be a horizontal direction perpendicular to the direction of gravity.

[0063] The first limiting member 20 is a component in the cutting device 100 used to abut against the workpiece 200 along the first direction X. Exemplarily, the first limiting member 20 may be fixed relative to the cutting mechanism 10, and in some embodiments, the first limiting member 20 may also move relative to the cutting mechanism 10 along the first direction X.

[0064] "The laser beam 11 is located on one side of the first limiting member 20 in the second direction Y" can be understood as the laser beam 11 extending from one side of the first limiting member 20 in the second direction Y along the first direction X and abutting against the workpiece 200.

[0065] Understandably, the first limiting member 20 should be located on the same side of the workpiece 200 in the first direction X as the cutting mechanism 10, so that the laser beam 11 is located on the side of the first limiting member 20 in the second direction Y.

[0066] In some embodiments, please refer to Figure 2 The cutting device 100 also includes a frame 30, which can be fixed relative to the ground. The frame 30 includes a plurality of support rods 31 and a mounting frame 32. The thickness direction of the mounting frame 32 is parallel to the first direction X. The middle part of the mounting frame 32 is a hollow structure through which the laser beam 11 passes. Two support rods 31 are spaced apart along the second direction Y on the side of the mounting frame 32 facing the cutting mechanism 10 in the first direction X, forming a placement space 301 on the side of the mounting frame 32 facing the cutting mechanism 10. The placement space 301 communicates with the hollow structure of the mounting frame 32. One end of the first limiting member 20 in the third direction Z is connected to the support member, and at least a portion of the first limiting member 20 is located within the placement space 301. The portion of the workpiece 200 to be cut in the third direction Z enters the placement space 301 through the gap between the first limiting member 20 and the mounting frame 32 in the first direction X. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0067] The first side 21 is the side of the first limiting member 20 facing the laser beam 11. For example, the first side 21 can be a curved surface or a plane.

[0068] The suction port 211 is an opening provided on the first side 21. To illustrate the extent of the suction port 211, refer to... Figure 1 , Figure 1The range of the suction port 211 is indicated by a dashed line located within the first limiting member 20. It should be noted that the dashed line is only used to indicate the range of the suction port 211 and has no other meaning.

[0069] The suction port 211 can be in various shapes; for example, the suction port 211 can be square or round.

[0070] The negative pressure mechanism (not shown in the figure) is a mechanism that provides negative pressure to the suction port 211. Exemplarily, the negative pressure mechanism (not shown in the figure) can be used to drive the air on the first side 21 close to the suction port 211 away from the suction port 211 to form an adsorption force on the surface of the first side 21. The negative pressure mechanism (not shown in the figure) can be a vacuum pump or an exhaust fan.

[0071] In this embodiment, a negative pressure is provided to the suction port 211 by a negative pressure mechanism (not shown in the figure) to drive the air near the suction port 211 away from the first side 21, so as to form an adsorption force on the surface of the first side 21 and drive it to approach the suction port 211 and be collected. This reduces the risk that cutting residue will stick to the first side 21 of the first limiting member 20 and block the laser beam 11, thus reducing the processing quality of the cutting device 100.

[0072] According to some embodiments of this application, please refer to Figure 1 Please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the first limiting member 20 provided in some embodiments of this application. Figure 4 for Figure 3 A cross-sectional view of AA. The first limiting member 20 has a second side 22 in the first direction X, the second side 22 being used to abut against the workpiece 200, and the dust suction port 211 extending to the second side 22.

[0073] The first side 21 is the side of the first limiting member 20 that abuts against the workpiece 200 in the first direction X.

[0074] Understandably, the first side 21 can be adapted to the side of the workpiece 200 in order to increase the contact area between the first limiting member 20 and the workpiece 200 and improve the stability of the contact between the first limiting member 20 and the workpiece 200.

[0075] In this embodiment, the suction port 211 extends to the second side 22. On the one hand, this increases the size of the suction port 211 in the first direction X, thereby increasing the area of ​​the suction port 211 while keeping its size in the third direction Z constant. This increases the range within which the suction port 211 can adsorb cutting residue, further reducing the risk of cutting residue adhering to the first side 21 of the first limiting member 20 and blocking the laser beam 11, thus causing a decrease in the processing quality of the cutting device 100. The third direction Z, the first direction X, and the second direction Y are all perpendicular to each other. On the other hand, since the suction port 211 extends to the second side 22, the second side 22 can be used as a processing reference surface when processing the suction port 211. This makes it easier to obtain the suction port 211 by machining the second side 22, thereby reducing the processing difficulty of the first limiting member 20 and reducing the manufacturing cost of the cutting device 100.

[0076] According to some embodiments of this application, please refer to Figure 3 and Figure 4 The first limiting member 20 has a first cavity 201, the dust suction port 211 is connected to the first cavity 201, and the negative pressure mechanism (not shown in the figure) is connected to the first cavity 201.

[0077] The first limiting member 20 can be a shell-shaped part with a first cavity 201 inside.

[0078] In some embodiments, the first limiting member 20 may be made of metal or a material with a certain strength to reduce the risk of deformation of the first limiting member 20 due to negative pressure in the first cavity 201.

[0079] In some embodiments, please refer to Figure 3 and Figure 4 The first limiting member 20 may include a housing 20B and an end cap 20A. The housing 20B has an opening in the first direction X, and the end cap 20A closes the opening. The side of the end cap 20A away from the housing 20B in the first direction X is the second side 22. In this way, by setting the first limiting member 20 as a split type, it is easier to process the first cavity 201 inside the first limiting member 20, and the processing difficulty of the first limiting member 20 is reduced.

[0080] In some embodiments, please refer to Figure 4 The end cap 20A is recessed on the side facing the laser beam 11 in the second direction Y to form a groove 212. The groove 212 extends along the first direction X and penetrates the end cap 20A along the first direction X. One end of the groove 212 is connected to the first space, and the groove opening of the groove 212 is a dust suction port 211.

[0081] Specifically, the negative pressure mechanism (not shown in the figure) causes the gas in the first cavity 201 to leave the first cavity 201, so that the first cavity 201 is under negative pressure. This causes the air on the first side 21 that is close to the suction port 211 to enter the first cavity 201 from the suction port 211, so that an adsorption force is formed on the surface of the first side 21, which drives it to approach the suction port 211 and be collected by the first cavity 201 or the negative pressure mechanism (not shown in the figure).

[0082] In this embodiment, the first limiting member 20 has a first cavity 201. The negative pressure mechanism (not shown in the figure) is connected to the suction port 211 through the first cavity 201. On the one hand, when the suction port 211 adsorbs the cutting residue, the first cavity 201 can uniformly distribute the negative pressure provided by the negative pressure mechanism (not shown in the figure), thereby making the adsorption force of each area of ​​the suction port 211 similar, reducing the risk of cutting residue sticking to the first side 21 of the first limiting member 20 due to the weak adsorption force in some areas of the suction port 211. On the other hand, the first cavity 201 can serve as a temporary storage space for cutting residue, so as to facilitate the collection of cutting residue.

[0083] According to some embodiments of this application, please refer to Figure 1 Please refer to Figure 3 and Figure 4 The first limiting member 20 has a second side 22 in the first direction X. The second side 22 is used to abut against the workpiece 200. The second side 22 has an adsorption hole 221. A negative pressure mechanism (not shown in the figure) is connected to the adsorption hole 221.

[0084] The adsorption hole 221 is a channel with one end provided on the second side 22. For example, the adsorption hole 221 can be in various shapes. For example, the dust suction port 211 can be square or round.

[0085] The adsorption holes 221 can be arranged in multiple rows along the second direction Y, and each row of adsorption holes 221 can be arranged in multiple intervals along the third direction Z.

[0086] The negative pressure mechanism (not shown in the figure) can be used to drive the air near one end of the adsorption hole 221 located on the second side 22 into the adsorption hole 221 to form an adsorption force on the surface of the second side 22.

[0087] In some embodiments, please refer to Figure 4The adsorption hole 221 is a channel that penetrates the end cap 20A along the thickness direction of the end cap 20A. The thickness direction of the end cap 20A is parallel to the first direction X, so that the other end of the adsorption hole 221 is connected to the first cavity 201. This allows the gas in the first cavity 201 to leave the first cavity 201 when the negative pressure mechanism (not shown in the figure) causes the first cavity 201 to be under negative pressure. This allows the air on the second side 22 that is close to the adsorption hole 221 to enter the first cavity 201 from the adsorption hole 221, so as to form an adsorption force on the surface of the second side 22.

[0088] In this embodiment, the second side 22 has an adsorption hole 221, and a negative pressure mechanism (not shown in the figure) is connected to the adsorption hole 221. The negative pressure mechanism (not shown in the figure) provides negative pressure to the adsorption hole 221 so that the end of the adsorption hole 221 located on the second side 22 is under negative pressure. When the cutting mechanism 10 provides a laser beam 11 extending along the first direction X to cut the workpiece 200, the workpiece 200 will be driven closer to the second side 22 by the adsorption force generated by the negative pressure at the end of the adsorption hole 221 located on the second side 22. This makes the workpiece 200 fit against the second side 22 of the first limiting member 20 along the first direction X, reducing the risk that the focus of the laser beam 11 will not coincide with the workpiece 200 due to the movement of the workpiece 200 in the first direction X, which would lead to a decrease in the processing quality of the cutting device 100.

[0089] According to some embodiments of this application, refer to Figure 1 Please refer to Figure 4 The workpiece 200 is an electrode 210, which includes a current collector 210A and an active material layer 210B. The current collector 210A has an active material layer 210B on at least one side in its thickness direction and abuts against the second side 22. The radial dimension of the adsorption hole 221 is D, which satisfies 0.8mm≤D≤1.2mm.

[0090] Electrode 210 is a component used to form an electrode assembly in a battery cell.

[0091] In some embodiments, refer to Figure 3 The electrode 210 includes a current collector 210A and an active material layer 210B. The current collector 210A has a coated area with the active material layer 210B and an uncoated area without the active material layer 210B along the width direction of the electrode 210.

[0092] When electrode 210 is used as the positive electrode in the electrode assembly, as an example, the active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials in batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites.

[0093] When electrode 210 serves as the negative electrode in the electrode assembly, as an example, the active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0094] Understandably, since the active material layer 210B is a dried slurry, dust is easily generated in the active material layer 210B during transportation.

[0095] D is the radial dimension of the adsorption hole 221, and B can be any point value or a range between any two of the following: 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.9mm, 1mm, 1.1mm, and 1.2mm.

[0096] In this embodiment, on the one hand, when D≥0.8mm, the adsorption pore 221 has a certain radial dimension, thereby reducing the risk of the powder of the active material layer 210B blocking the adsorption pore 221 and causing a decrease in the adsorption force of the second side 22; on the other hand, when the number of adsorption pores 221 and the area of ​​the second side 22 are fixed, when D≤1.2mm, the area of ​​the second side 22 used to support the electrode 210 can be increased, thereby reducing the risk of the electrode 210 deforming due to the adsorption force generated by the negative pressure of the adsorption pore 221; therefore, when 0.8mm≤D≤1.2mm, the risk of the powder of the active material layer 210B blocking the adsorption pore 221 and causing a decrease in the adsorption force of the second side 22 can be reduced, and the risk of the electrode 210 deforming due to the adsorption force generated by the negative pressure of the adsorption pore 221 can also be reduced.

[0097] According to some embodiments of this application, please refer to Figure 2 The cutting mechanism 10 also includes a second limiting member 40; the second limiting member 40 and the first limiting member 20 are spaced apart along the first direction X, and the second limiting member 40 and the first limiting member 20 respectively abut against the two sides of the workpiece 200 that are opposite to each other in the first direction X.

[0098] The second limiting member 40 is a component in the cutting device 100 used to abut against the workpiece 200 on the side away from the first limiting member 20 in the first direction X. Exemplarily, the second limiting member 40 may be fixed relative to the cutting mechanism 10, and in some embodiments, the first limiting member 20 may also move relative to the cutting mechanism 10 in the first direction X.

[0099] In some embodiments, please refer to Figure 2 The second limiting member 40 is connected to the mounting frame 32 at both ends in the third direction Z. The workpiece 200 enters the placement space 301 through the gap between the first limiting member 20 and the second limiting member 40 in the first direction X.

[0100] In this embodiment, the second limiting member 40 and the first limiting member 20 respectively abut against the two sides of the workpiece 200 that are opposite to each other in the first direction X, so that the second limiting member 40 and the first limiting member 20 can restrict the movement of the workpiece 200 in the first direction X. Thus, when the cutting mechanism 10 provides a laser beam 11 extending in the first direction X to cut the workpiece 200, the risk of the processing quality of the cutting device 100 being reduced due to the movement of the workpiece 200 in the first direction X causing the focal point of the laser beam 11 to not coincide with the workpiece 200 is reduced.

[0101] According to some embodiments of this application, please refer to Figure 2 The second limiting component 40 is a roller.

[0102] In some embodiments, please refer to Figure 2The rotation axis of the second limiting member 40 is parallel to the third direction Z. It can be understood that when the workpiece 200 moves along the second direction Y, the second limiting member 40 can rotate about its axis.

[0103] In some embodiments, please refer to Figure 2 The cutting mechanism 10 also includes a fourth limiting member 41, which is disposed upstream of the first limiting member 20 along the routing direction of the workpiece 200. The fourth limiting member 41 is a roller, and the fourth limiting member 41 and the second limiting member 40 respectively abut against the two sides of the workpiece 200 that are opposite to each other in the first direction X. On a plane perpendicular to the first direction X, the orthographic projection of the fourth limiting member 41 and the orthographic projection of the second limiting member 40 overlap.

[0104] In this embodiment, the second limiting member 40 is a roller, so that when the workpiece 200 has relative movement with respect to the second limiting member 40, the second limiting member 40 can rotate to follow the movement of the workpiece 200, thereby reducing the risk of the second limiting member 40 scratching the surface of the workpiece 200.

[0105] According to some embodiments of this application, please refer to Figure 5 and Figure 6 , Figure 5 and Figure 6 The diagram shows the structure of two cutting devices 100 provided in some embodiments of this application. The cutting mechanism 10 also includes a third limiting member 50; along the second direction Y, there is a gap between the first limiting member 20 and the third limiting member 50 for the laser beam 11 to pass through; the third limiting member 50 abuts against the workpiece 200 along the first direction X.

[0106] The third limiting member 50 is a component in the cutting device 100 used to abut against the workpiece 200 along a third direction Z. Exemplarily, the third limiting member 50 may be fixed relative to the cutting mechanism 10, and in some embodiments, the third limiting member 50 may also move relative to the cutting mechanism 10 along a first direction X.

[0107] In some embodiments, one end of the third limiting member 50 in the second direction Y is located within the placement space 301, and the support rod 31 in the second direction Y, away from the first limiting member 20, is connected to the third limiting member 50.

[0108] In this embodiment, by setting the third limiting member 50 to be located on opposite sides of the laser beam in the second direction Y, and setting the third limiting member 50 to abut against the workpiece 200 in the first direction X, the third limiting member 50 restricts the movement of the portion of the workpiece 200 located on the side of the laser beam 11 away from the first limiting member 20 in the second direction Y along the first direction X when the cutting mechanism 10 cuts the workpiece 200. This reduces the risk of the processing quality of the cutting device 100 being reduced due to the focal point of the laser beam 11 not coinciding with the workpiece 200 caused by the movement of the workpiece 200 in the first direction X.

[0109] According to some embodiments of this application, please refer to Figure 5 and Figure 6 The third limiting member 50 is a conveyor belt that extends along the second direction Y. The conveyor belt is used to drive the workpiece 200 away from the first limiting member 20 along the second direction Y.

[0110] The conveyor belt is the driving component for the workpiece 200 to move along the second direction Y.

[0111] In some embodiments, please refer to Figure 5 and Figure 6 The cutting device 100 also includes a guide roller 60, a third limiting member 50, and the guide roller 60 respectively abutting against opposite sides of the workpiece 200 in the first direction X. The guide roller 60 is used to guide the workpiece 200 to disengage from the third abutting member along a preset direction.

[0112] In this embodiment, by setting the third limiting member 50 to include a conveyor belt, the third limiting member 50 can drive the area of ​​the workpiece 200 after cutting to continue moving along the second direction Y, thereby facilitating the continuous cutting of the workpiece 200 and thus improving the cutting efficiency of the cutting device 100.

[0113] According to some embodiments of this application, please refer to Figure 5 and Figure 6 Please refer to Figure 7 , Figure 7 for Figure 6 Enlarged view at point B. The third limiting member 50 includes at least two rollers 52 and a conveyor belt 51; the at least two rollers 52 are spaced apart along the second direction Y; the conveyor belt 51 is sleeved on the at least two rollers 52, and the at least two rollers 52 rotate to make the conveyor belt 51 drive the workpiece 200 away from the first limiting member 20 along the second direction Y; wherein, the conveyor belt 51 has a connecting hole 511, and the two ends of the connecting hole 511 are respectively provided on the inner surface of the conveyor belt 51 and the outer surface of the conveyor belt 51.

[0114] The conveyor belt 51 is the main part of the third limiting member 50. Exemplarily, the conveyor belt 51 is typically made of materials such as rubber, plastic, metal or fabric.

[0115] In some embodiments, the third limiting member 50 further includes a drive mounting bracket 54 and a drive motor 53. One end of the drive mounting bracket 54 in the second direction Y is connected to the frame 30. At least two rollers 52 are disposed on the mounting bracket 54 and spaced apart along the second direction Y. The rollers 52 are rotatable about their axes, which are parallel to the third direction Z. The drive motor 53 is disposed on the mounting bracket 54 and is used to drive one of the rollers 52 to rotate, thereby driving the conveyor belt 51 to circulate between the two or more rollers 52.

[0116] The connecting hole 511 is a channel with one end disposed on the inner surface of the conveyor belt 51 and the other end disposed on the outer surface of the conveyor belt 51. For example, the connecting hole 511 can be in various shapes, such as square or round.

[0117] The connecting holes 511 can be arranged in multiple rows along the extension direction of the conveyor belt 51, and each row of connecting holes 511 can be arranged at multiple intervals along the third direction Z.

[0118] In this embodiment, the two ends of the connecting hole 511 are respectively disposed on the inner surface and the outer surface of the conveyor belt 51. On the one hand, this facilitates the removal of dust and cutting residue carried by the workpiece 200 that falls into the conveyor belt 51 from the inner surface of the conveyor belt 51 through the connecting hole 511, thereby reducing the risk of the conveyor belt 51 slipping due to the accumulation of dust and cutting residue carried by the workpiece 200 on the inner surface of the conveyor belt 51. On the other hand, compared to the case where multiple conveyor belts 51 are arranged at Z intervals along a third direction and gaps are set between multiple conveyor belts 51, by disposing the two ends of the connecting hole 511 on the inner surface and the outer surface of the conveyor belt 51 respectively, so that the dust and cutting residue carried by the workpiece 200 can leave the inner surface of the conveyor belt 51 through the connecting hole 511, the integrity of the conveyor belt 51 can be increased and the structural strength of the conveyor belt 51 can be increased.

[0119] According to some embodiments of this application, the workpiece 200 is an electrode 210, which includes a current collector 210A and an active material layer 210B. The current collector 210A has the active material layer 210B disposed on at least one side in its thickness direction, and the first limiting member 20 abuts against the active material layer 210B along the first direction X.

[0120] In some embodiments, the current collector 210A has a coated area with an active material layer 210B and an uncoated area without the active material layer 210B along the width direction of the electrode 210. The cutting device 100 is used to cut tabs on the current collector 210A without the active material layer 210B.

[0121] In this embodiment, the first limiting member 20 abuts against the active material layer 210B along the first direction X, thereby achieving structural limiting of the electrode 210 in the first direction X, so that the cutting device 100 can cut the electrode 210.

[0122] This application provides an electrode manufacturing apparatus including the cutting device 100 provided in any of the above embodiments.

[0123] According to some embodiments of this application, refer to Figures 1-7This application provides a cutting device 100 for cutting a workpiece 200, the workpiece 200 being an electrode 210. The electrode 210 includes a current collector 210A and an active material layer 210B. The current collector 210A has the active material layer 210B disposed on at least one side of its thickness direction. The cutting device 100 includes a cutting mechanism 10 and a first limiting member 20. The cutting mechanism 10 is used to provide a laser beam 11 extending along a first direction X. The laser beam 11 is located on one side of the first limiting member 20 in a second direction Y. The first limiting member 20 abuts against the active material layer 210B along the first direction X. The first direction X is perpendicular to the second direction Y and parallel to the direction of gravity. The cutting device 100 also includes a negative pressure mechanism (not shown in the figure). The first limiting member 20 has a first side 21 facing the laser beam 11 in the second direction Y. The first side 21 has a dust suction port 211. The negative pressure mechanism (not shown in the figure) is connected to the dust suction port 211 and is used to provide negative pressure. A limiting member has a second side 22 in the first direction X, which is used to abut against the workpiece 200. A dust suction port 211 extends to the second side 22. The first limiting member 20 has a first cavity 201, and the dust suction port 211 is connected to the first cavity 201. A negative pressure mechanism (not shown in the figure) is connected to the first cavity 201. The first limiting member 20 has a second side 22 in the first direction X, which is used to abut against the workpiece 200. The second side 22 has an adsorption hole 221, and the negative pressure mechanism (not shown in the figure) is connected to the adsorption hole 221. The radial dimension of the adsorption hole 221 is D, which satisfies 0.8mm≤D≤1.2mm. The cutting mechanism 10 also includes a second limiting member 40; the second limiting member 40 and the first limiting member 20 are spaced apart along the first direction X, and the second limiting member 40 and the first limiting member 20 abut against the two opposite sides of the workpiece 200 in the first direction X. The second limiting member 40 is a roller. The cutting mechanism 10 also includes a third limiting member 50; along the second direction Y, there is a gap between the first limiting member 20 and the third limiting member 50 for the laser beam 11 to pass through; the third limiting member 50 abuts against the workpiece 200 along the first direction X. The third limiting member 50 is a conveyor belt, which extends along the second direction Y and is used to drive the workpiece 200 away from the first limiting member 20 along the second direction Y. The third limiting member 50 includes at least two rollers 52 and a conveyor belt 51; the at least two rollers 52 are spaced apart along the second direction Y; the conveyor belt 51 is sleeved on the at least two rollers 52, and the at least two rollers 52 rotate to cause the conveyor belt 51 to drive the workpiece 200 away from the first limiting member 20 along the second direction Y; wherein, the conveyor belt 51 has a connecting hole 511, and the two ends of the connecting hole 511 are respectively provided on the inner surface and the outer surface of the conveyor belt 51.

[0124] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0125] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting apparatus for cutting a workpiece, characterized by, The cutting device comprises: a cutting mechanism for providing a laser beam extending along a first direction; a first limiting member, the laser beam being located on one side of the first limiting member in a second direction, the first limiting member abutting against the workpiece along the first direction, the first direction being perpendicular to the second direction; wherein the cutting device further comprises a negative pressure mechanism, the first limiting member having a first side facing the laser beam in the second direction, the first side having a dust suction port, the negative pressure mechanism being connected with the dust suction port, the negative pressure mechanism being configured to provide negative pressure.

2. The cutting device of claim 1, wherein, The first limiting member has a second side in the first direction, the second side being configured to abut against the workpiece, the dust suction port extending to the second side.

3. The cutting apparatus of claim 1, wherein, The first limiting member has a first cavity therein, the dust suction port being connected with the first cavity, the negative pressure mechanism being connected with the first cavity.

4. The cutting apparatus of claim 1 wherein, The first limiting member has a second side in the first direction, the second side being configured to abut against the workpiece, the second side having a suction hole, the negative pressure mechanism being connected with the suction hole.

5. The cutting apparatus of claim 4, wherein, The workpiece is a pole piece, the pole piece comprising a current collector and an active material layer, the current collector being provided with the active material layer on at least one side in the thickness direction of the current collector and abutting against the second side, a radial dimension of the suction hole being D, satisfying 0.8mm≤D≤1.2mm.

6. The cutting apparatus of claim 1 wherein, The cutting mechanism further comprises: a second limiting member, the second limiting member being spaced apart from the first limiting member along the first direction, the second limiting member and the first limiting member respectively abutting against two sides of the workpiece opposite to each other in the first direction.

7. The cutting apparatus of claim 6, wherein, The second limiting member is a roller.

8. The cutting apparatus of claim 1 wherein, The cutting mechanism further comprises: a third limiting member, the first limiting member and the third limiting member having a gap for the laser beam to pass through along the second direction; the third limiting member abutting against the workpiece along the first direction.

9. The cutting apparatus of claim 8, wherein, The third limiting member is a conveyor belt, the conveyor belt extending along the second direction, the conveyor belt being configured to drive the workpiece to move away from the first limiting member along the second direction.

10. The cutting apparatus of claim 9, wherein, The third limiting member comprises: at least two rollers, the at least two rollers being spaced apart along the second direction; a conveyor belt, the conveyor belt being sleeved on the at least two rollers, the at least two rollers being configured to rotate to drive the conveyor belt to drive the workpiece to move away from the first limiting member along the second direction; wherein the conveyor belt has a connecting hole, two ends of the connecting hole being respectively arranged on an inner surface of the conveyor belt and an outer surface of the conveyor belt.

11. The cutting apparatus of any one of claims 1-10, wherein, The workpiece is a pole piece, the pole piece comprising a current collector and an active material layer, the current collector being provided with the active material layer on at least one side in the thickness direction of the current collector, the first limiting member abutting against the active material layer along the first direction.

12. An electrode tab manufacturing apparatus characterized by comprising: The cutting device as claimed in any one of claims 1-11.

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