Electrode sheet die-cutting device

Abstract

The electrode sheet punching device includes a laser processing table (110), a laser cutting machine (120), and a flaw detection module (130). The laser processing table (110) is located below the electrode sheet (200) and has a plurality of suction holes (111) that can suck and fix the electrode sheet (200) to the surface of the laser processing table (110). The laser cutting machine (120) is located facing the laser processing table (110) and emits ultrashort pulsed ultraviolet light toward the electrode sheet (200) to cut the electrode sheet (200). The flaw detection module (130) is located downstream of the laser cutting machine (120) along the flow path of the electrode sheet (200) and is used to detect the appearance of the electrode sheet (200) cut by the laser cutting machine (120). This embodiment prevents the electrode sheet (200) from moving and shifting, and also prevents dimensional fluctuations due to deformation of the electrode sheet (200) itself, thereby ensuring stable and high cutting quality for the electrode sheet (200). Furthermore, by using ultrashort pulse ultraviolet light to cut the electrode sheet (200), low-temperature processing of the electrode sheet (200) is achieved, preventing deformation and carbonization of the polymer layer of the composite current collector due to high cutting temperatures, and achieving higher cutting quality.

Description

[Technical Field]

[0001] The present application relates to the technical field of new energy battery production, and in particular to an electrode sheet punching device. [Background technology]

[0002] With strong support for the national new energy policy, the research and development of batteries has become a field of great interest. Due to their advantages such as high energy density, long service life, environmental friendliness and pollution-free operation, and high safety performance, batteries are widely used in consumer electronics and electric vehicles. At the same time, people's demand for batteries is also increasing. How to achieve high battery safety has become a focus of current research. With the continuous development of the battery industry, a current collector with better performance has emerged, namely a composite current collector combining polymers and metals. Composite current collectors can reduce the temperature rise of batteries, reduce the risk of thermal runaway, and improve battery safety.

[0003] During battery production, electrode sheets are coated and dried to form a roll that must be punched into specific shapes for use in battery production. Current technologies for punching current collectors primarily include direct blade punching and optical fiber laser punching. Direct blade punching involves directly cutting the electrode sheet into the required shape using a blade. It can be divided into two types: (1) wooden board blade punching, in which a sharp blade is attached to a wooden board and the electrode sheet is cut by the blade under a certain pressure, and (2) die punching, in which the electrode sheet is cut using a very small gap between the punch and the lower blade die. However, direct blade punching has problems with blade wear, and the clamping state of the blade during assembly varies depending on the parties involved, making the punching process unstable, resulting in poor electrode sheet cutting quality, reduced battery performance, complicated blade maintenance, and high repair costs. For these reasons, optical fiber laser punching is increasingly being adopted in conventional technologies. The principle of optical fiber laser die cutting is that a high-power density laser beam is used to irradiate the electrode sheet of the battery to be cut, causing the electrode sheet to heat up quickly to a high temperature, rapidly melting, vaporizing, ablation, or reaching the ignition point and forming holes. As the light beam moves across the electrode sheet, the holes form a series of narrow cuts, completing the cutting of the electrode sheet.

[0004] While laser cutting has no processing problems with conventional current collectors made of copper or aluminum foil, when a laser cutting process is used to cut a composite current collector, the composite current collector has an insulating layer made of a polymer material, which carbonizes, shrinks, and deforms when exposed to heat during cutting of the electrode sheet, resulting in poor cutting quality of the electrode sheet, which affects subsequent battery cell production and reduces battery performance. At the same time, conventional laser cutting methods also have problems such as the electrode sheet shifting and shifting during the cutting process, which results in poor cutting quality of the electrode sheet. Summary of the Invention

[0005] Based on this, there is a need to provide an electrode sheet die-cutting device to solve the problem of poor cutting quality of electrode sheets existing in the prior art.

[0006] The present application provides an electrode sheet punching device used to cut an electrode sheet, the device comprising an electrode sheet transport device, a laser processing table, a laser die cutting machine, and a flaw detection module. The electrode sheet transport device is used to transport the electrode sheet along a transfer path. The laser processing table is located on the transfer path side and has a plurality of suction holes that can adsorb the electrode sheet and secure it to the surface of the laser processing table. The laser die cutting machine is located facing the laser processing table and cuts the electrode sheet by emitting ultrashort pulsed ultraviolet light toward the electrode sheet. The flaw detection module is located downstream of the laser processing table along the transfer path and is used to detect the appearance of the electrode sheet cut by the laser die cutting machine.

[0007] In the above-described embodiment, by providing a plurality of suction holes in the laser cutting table, the electrode sheet is adsorbed and fixed to the surface of the laser cutting table during the process of cutting the electrode sheet with the laser cutting machine. The laser cutting table serves to support and fix the electrode sheet, preventing the electrode sheet from moving and shifting, and also preventing dimensional fluctuations due to deformation of the electrode sheet itself. Furthermore, by providing a flaw detection module downstream of the laser cutting machine to detect the appearance of the electrode sheet cut by the laser cutting machine, the cutting quality of the electrode sheet is stable and high. Furthermore, by using ultrashort pulse ultraviolet light to cut the electrode sheet, low-temperature processing of the electrode sheet is achieved, avoiding deformation and carbonization of the polymer layer of the composite current collector due to high cutting temperatures, and achieving higher cutting quality.

[0008] The technical aspects of the present application will be further described below.

[0009] In any embodiment, the electrode sheet transport device includes a plurality of transport rollers that define the flow path, and includes at least one support roller used to stretch the electrode sheet.

[0010] In any embodiment, the electrode sheet transport device includes a front support roller and a rear support roller located upstream and downstream of the laser processing table, respectively, along the flow path of the electrode sheet, and the electrode sheet is stretched between the front support roller and the rear support roller.

[0011] In any embodiment, when the electrode sheet is stretched between the front support roller and the rear support roller, the distance between the electrode sheet and the laser processing table is 1 mm to 10 mm.

[0012] In any embodiment, the electrode sheet transport device further includes a pass roller and an oscillating roller, the electrode sheet is successively stretched between the pass roller, the oscillating roller, and the front support roller, and the oscillating roller is movable relative to the pass roller and / or the front support roller so as to lengthen or shorten the length of the electrode sheet between the oscillating roller and the pass roller and / or the front support roller.

[0013] In any embodiment, the electrode sheet punching device further includes a rotary suction robot arm positioned between the laser processing table and the flaw detection module and rotatable relative to the laser processing table so as to suction the electrode sheet and transfer it to the flaw detection module.

[0014] In any embodiment, the scratch detection module includes a scratch detection device and a conveying member on which the electrode sheet is located, the scratch detection device being disposed toward the conveying member so as to detect the electrode sheet.

[0015] In any embodiment, the scratch detection module further includes a robot gripping arm that rotates relative to the conveying member so as to adsorb and transfer the electrode sheet, and a suction cup connected to one end of the robot arm that is closer to the conveyor.

[0016] In any embodiment, the scratch detection module further includes a good product collection box and a bad product collection box, both located downstream of the conveying member, used to collect the electrode sheets transferred by the robot gripping arm.

[0017] In any embodiment, the laser die-cutting machine includes a laser generator, a filtering module, and a focusing lamp, the laser generator and the focusing lamp are all arranged toward the laser processing table, the laser generator emits an ultrashort pulse laser toward the electrode sheet, and the filtering module is located between the laser generator and the electrode sheet and filters the ultrashort pulse laser into ultrashort pulse ultraviolet light. [Brief explanation of the drawings]

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, and the schematic embodiments and their descriptions are for the purpose of interpreting this application and do not constitute undue limitations on this application.

[0019] In order to clarify the description of the technical aspects in the embodiments of the present application, the following briefly introduces the drawings that need to be used in the description of the embodiments. However, the drawings in the following description are only some embodiments of the present application, and it is obvious that a person skilled in the art can further obtain other drawings according to these drawings without paying any creative labor.

[0020] [Figure 1] 1 is a structural schematic diagram of a laser processing table, a laser die cutting machine, and an electrode sheet transport device shown in one embodiment of the present application. [Figure 2]1 is a structural schematic diagram of a scratch detection module shown in an embodiment of the present application; [Explanation of symbols]

[0021] 110...laser processing table, 111...suction hole, 120...laser die cutting machine, 121...laser generator, 122...focusing lamp, 130...flaw detection module, 131...flaw detection device, 132...transport member, 133...robot gripping arm, 134...suction cup, 135...good product collection box, 136...defective product collection box, 140...electrode sheet transport device, 141...front support roller, 142...rear support roller, 143...path roller, 144...oscillating roller, 145...transport roller, 150...rotating suction robot arm, 160...unwinding shaft, 170...winding shaft, 200...electrode sheet. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to make the above-mentioned objects, features, and advantages of the present application clearer and easier to understand, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth to fully understand the present application. However, the present application can be embodied in many other forms different from those described herein, and those skilled in the art can make similar modifications without violating the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art, and the terms used herein are only for describing specific embodiments and are not intended to limit the present application, and the terms "comprises" and "having" and any variations thereof in the specification, claims, and brief description of the drawings above are intended to cover a non-exclusive inclusion.

[0024] In the description of the embodiments of the present application, the term "and / or" merely describes the relationship between related objects and indicates that three types of relationships can exist. For example, A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this specification generally indicates that the related objects before and after it are in an "or" relationship.

[0025] In the description of this application, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of this application. It should be understood that these terms do not indicate or imply that the referred devices or elements must have a specific orientation or be configured and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0026] Furthermore, the terms "first" and "second" are for descriptive purposes only and cannot be understood as indicating or implying the relative importance or the quantity of the technical features indicated. Accordingly, a feature qualified as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this application, unless otherwise clearly and specifically limited, "plurality" means at least two, e.g., two, three, etc.

[0027] In this application, unless otherwise clearly specified or limited, the terms "attach," "connect," "couple," "fix," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction between two elements. Unless otherwise clearly limited, a person skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise clearly specified or limited, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," or "on the upper surface" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," or "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0029] It should be noted that when an element is said to be "fixed to" or "mounted on" another element, it may be directly connected to the other element, or there may be intervening elements present. When an element is referred to as being "connected" to another element, it may be directly connected to the other element, or there may also be intervening elements present.

[0030] Preferred embodiments of the present invention will be described below with reference to the drawings.

[0031] As shown in Figures 1 and 2, an electrode sheet punching device is disclosed in one embodiment of the present application. The electrode sheet punching device is used to cut an electrode sheet 200. The electrode sheet 200 used in the electrode sheet punching device may be a flexible film-like material such as a composite current collector (copper foil, aluminum foil), a conventional current collector, or a polymer thin film material. This embodiment will be described using an example in which the electrode sheet 200 is a composite current collector. The selected electrode sheet 200 is a 1 + 4 + 1 μm composite copper foil, i.e., the PET (polyethylene terephthalate) polymer layer is 4 μm thick, and both sides are metal layers of 1 μm thick.

[0032] 1 and 2, the electrode sheet die-cutting apparatus includes a laser processing table 110, a laser die-cutting machine 120, a flaw detection module 130, and an electrode sheet transport device 140. The electrode sheet transport device 140 is used to transport the electrode sheet 200 along a flow path. The electrode sheet transport device 140 includes a plurality of transport rollers 145 that define the flow path of the electrode sheet 200. The electrode sheet transport device 140 further includes at least one support roller for tensioning the electrode sheet 200.

[0033] As shown in FIG. 1, the electrode sheet punching device further includes an unwinding shaft 160 and a winding shaft 170. As shown in FIG. 1, the electrode sheet 200 to be punched is placed on the unwinding shaft 160 and flows along the laser processing table 110 to the winding shaft 170. The winding shaft 170 is used to collect scraps remaining after laser punching, and the remaining scraps are transported along the flow path to the winding shaft 170 for uniform collection and processing. Preferably, the unwinding shaft 160 has a common unwinding shaft 160 design, such as a conical tip structure or an air shaft. The unwinding and winding power of the unwinding shaft 160 and the winding shaft 170 is provided by a servo motor, and both forward and reverse rotation are possible.

[0034] The running speed of the electrode sheet 200 is controlled by the unwinding speed of the unwinding shaft 160 and the winding speed of the winding shaft 170, and is preferably in the range of 10 m / min to 150 m / min. In this embodiment, the running speed of the electrode sheet 200 is 80 m / min.

[0035] The laser processing table 110 is located below the electrode sheet 200 and is provided with a plurality of suction holes 111 on the side of the flow path, and the suction holes 111 can suction the electrode sheet 200 and fix it to the surface of the laser processing table 110. When the laser die cutting machine 120 starts suctioning the electrode sheet 200 in the process of cutting the electrode sheet 200, negative pressure causes the electrode sheet 200 to be adhered flatly to the surface of the laser processing table 110, and the laser processing table 110 serves to support and fix the electrode sheet 200, preventing the electrode sheet 200 from moving and shifting and also preventing dimensional fluctuations due to deformation of the electrode sheet 200 itself.

[0036] The distribution density of the suction holes 111 can be designed according to needs. Preferably, the suction holes 111 are uniformly distributed so that the force received when the electrode sheet 200 is suctioned and fixed to the surface of the laser processing table 110 is uniform. The magnitude of the pressure of the suction holes 111 can be adjusted and controlled according to actual needs. Preferably, in this embodiment, the atmospheric pressure of the suction holes 111 is 0.01 MPa.

[0037] The laser die cutting machine 120 is provided facing the laser processing table 110 and emits ultra-short pulse ultraviolet light toward the electrode sheet 200 to cut the electrode sheet 200 .

[0038] In the field of ultrafast optics, people usually refer to laser pulses with a pulse width of less than 1 nanosecond as ultrashort laser pulses, which includes laser pulses of several hundred picoseconds (1 picosecond = 10-12 seconds) to femtoseconds (1 femtosecond = 10-15 seconds), and even tens of attoseconds (1 attosecond = 10-18 seconds), which scientists can already obtain in laboratories today.

[0039] The laser die cutting machine 120 emits ultrashort pulses toward the electrode sheet 200 to cut the electrode sheet 200. Because the ultrashort pulses have a short action time, they have a small thermal effect, enabling low-temperature processing of the electrode sheet 200 and avoiding deformation and carbonization of the polymer layer of the composite current collector that would otherwise be caused by high cutting temperatures. Preferably, the one-shot pulse duration of the ultrashort pulses employed in this embodiment is only a few picoseconds.

[0040] On the other hand, ultraviolet light has a short wavelength elasticity, with a wavelength of approximately 350 nm to 455 nm, and lasers in this wavelength band are sharp, which makes it possible to achieve cutting of the electrode sheet 200 under conditions where the action time of the ultrashort pulse is short. Preferably, in this embodiment, the wavelength of the ultraviolet light is 355 nm.

[0041] As shown in FIG. 1 , in some embodiments of the present application, the laser die-cutting machine 120 preferably includes a laser generator 121, a filtering module (not shown), and a focusing lamp 122. The laser generator 121 and the focusing lamp 122 are both arranged facing the laser processing table 110. The role of the focusing lamp 122 is to focus and position the electrode sheet 200 on the laser processing table 110, thereby assisting the laser generator 121 in determining the processing focal length. The laser generator 121 is used to emit an ultrashort pulse laser toward the electrode sheet 200. When electrons in atoms absorb energy, transition from a lower energy level to a higher energy level, and then return from the higher energy level to the lower energy level, the released energy is released in the form of photons. The optical properties of the photons in the induced (excited) photon beam (laser) are highly consistent, forming a laser. The filtering module is located between the laser generator 121 and the electrode sheet 200, and filters the ultrashort pulse laser excited by the laser generator 121 at each layer, leaving only ultraviolet light at the end, thereby realizing the filtering of the ultrashort pulse laser into ultrashort pulse ultraviolet light.

[0042] Preferably, the power range of the laser die cutting machine 120 is 10 W to 50 W. In this embodiment, the power of the laser die cutting machine 120 is 30 W.

[0043] Preferably, the laser die-cutting machine 120 is provided with a PLC (Programmable Logic Controller) and an access port, which is used to access a USB memory or a computer. The shape and pattern used by the laser die-cutting machine 120 to cut the electrode sheet 200 can be directly input to the laser die-cutting machine 120 via the access port.

[0044] Preferably, the laser die cutting machine 120 further includes a screw motor for controlling the laser generator 121 to move in the X / Y axis directions (two directions perpendicular to each other) to complete cutting of the electrode sheet 200 in the set shape and dimensions.

[0045] The flaw detection module 130 is provided along the flow path of the electrode sheet 200, is located downstream of the laser die-cutting machine 120, and is used to detect the appearance of the electrode sheet 200 cut by the laser die-cutting machine 120. Specifically, the flaw detection module 130 can be used to detect the flatness, dimensions, etc. of the die-cut end surface of the electrode sheet 200.

[0046] When cutting the electrode sheet 200 using the electrode sheet punching device according to the present application, the electrode sheet 200 to be punched is placed on the unwinding shaft 160 and passes through the laser processing table 110 along the flow direction to reach the winding shaft 170. The laser processing table 110 is located between the unwinding shaft 160 and the winding shaft 170, and when it is necessary to cut the electrode sheet 200, the rotation of the unwinding shaft 160 and the winding shaft 170 is temporarily stopped to relatively stationary the electrode sheet 200. At this time, the suction holes 111 located on the laser processing table 110 begin to suction the electrode sheet 200, and the negative pressure causes the electrode sheet 200 to be flatly and tightly attached to the surface of the laser processing table 110, and at this time the laser punching machine 120 emits ultrashort pulse ultraviolet light toward the electrode sheet 200 to cut it. Thereafter, the flaw detection module 130 detects the appearance of the electrode sheet 200 cut by the laser die-cutting machine 120 to ensure the cutting quality of the electrode sheet 200 .

[0047] In the above embodiment, by providing multiple suction holes 111 in the laser processing table 110, the electrode sheet 200 is adsorbed and fixed to the surface of the laser processing table 110 during the process of cutting the electrode sheet 200 by the laser die cutting machine 120. The laser processing table 110 serves to support and fix the electrode sheet 200, preventing the electrode sheet 200 from moving and shifting, and also preventing dimensional fluctuations due to deformation of the electrode sheet 200 itself. In addition, by providing a flaw detection module 130 downstream of the laser die cutting machine 120 to detect the appearance of the electrode sheet 220 cut by the laser die cutting machine 120, the cutting quality of the electrode sheet 200 is stable and high. In addition, by using ultrashort pulse ultraviolet light to cut the electrode sheet 200, low-temperature processing of the electrode sheet 200 is achieved, avoiding deformation and carbonization of the polymer layer of the composite current collector due to high cutting temperatures, and achieving higher cutting quality.

[0048] As shown in FIG. 1 , in some embodiments of the present application, support rollers are preferably used to suspend the electrode sheet 200 during the process of cutting the electrode sheet 200 by the laser die-cutting machine 120 and the process of the electrode sheet 200 being transported. Suspending the electrode sheet 200 during the process of cutting the electrode sheet 200 by the laser die-cutting machine 120 prevents large dimensional errors in the cut electrode sheet 200, and suspending the electrode sheet 200 during the process of transporting the electrode sheet 200 prevents damage to the surface of the electrode sheet 200 due to friction with the laser processing table 110 during the process of transporting the electrode sheet 200. Preferably, the tension range of the electrode sheet 200 applied by the electrode sheet transport device 140 to the electrode sheet 200 is 3N to 100N. In this embodiment, the tension applied by the electrode sheet transport device 140 to the electrode sheet 200 is 20N.

[0049] As shown in FIG. 1, the electrode sheet transport device 140 includes a front support roller 141 and a rear support roller 142 located upstream and downstream of the laser processing table 110, respectively, along the flow path of the electrode sheet 200. The electrode sheet 200 is stretched between the front support roller 141 and the rear support roller 142. As a result, the electrode sheet 200 located above the laser processing table 110 is stretched during the process of the laser die cutting machine 120 cutting the electrode sheet 200 and the process of the electrode sheet 200 flowing.

[0050] As shown in FIG. 1 , according to some embodiments of the present application, when the electrode sheet 200 is stretched between the front support roller 141 and the rear support roller 142, the distance between the electrode sheet 200 and the laser processing table 110 is preferably 1 mm to 10 mm. If the distance between the electrode sheet 200 and the laser processing table 110 is too small, friction occurs between the electrode sheet 200 and the laser processing table 110, causing damage to the surface of the electrode sheet 200. If the distance between the electrode sheet 200 and the laser processing table 110 is too large, it is not favorable for the laser processing table 110 to adsorb the electrode sheet 200. Preferably, in this embodiment, the distance between the electrode sheet 200 and the laser processing table 110 is 3 mm.

[0051] 1 , according to some embodiments of the present application, the electrode sheet transport device 140 preferably further includes a pass roller 143 and a swing roller 144, and the pass roller 143 and the swing roller 144 are used to stretch the electrode sheet 200 between the unwinding shaft 160 and the winding shaft 170. Among them, the number of pass rollers 143 and the swing roller 144 is not limited, and a plurality of pass rollers 143 are provided along the flow path of the electrode sheet 200 so as to stretch the electrode sheet 200 between adjacent electrode sheet transport devices 140.

[0052] As shown in FIG. 1 , the electrode sheet 200 is successively stretched between a pass roller 143, a swinging roller 144, and a front support roller 141, and the swinging roller 144 is movable relative to the pass roller 143 and / or the front support roller 141 so as to increase or decrease the length of the electrode sheet 200 between the swinging roller 144 and the pass roller 143 and / or the front support roller 141. As shown in FIG. 1 , in this embodiment, when the swinging roller 144 moves in a direction away from the pass roller 143 (particularly referring to the pass roller 143 marked with a symbol), the length of the electrode sheet 200 between the swinging roller 144 and the pass roller 143 increases, and the tension of the electrode sheet 200 increases. When the swinging roller 144 moves in a direction toward the pass roller 143, the length of the electrode sheet 200 between the swinging roller 144 and the pass roller 143 decreases, and the tension of the electrode sheet 200 decreases.

[0053] In the embodiment shown in FIG. 1 , the oscillating roller 144 is rotatable around an upper fixed point as a rotation center. When the oscillating roller 144 rotates clockwise, the length of the electrode sheet 200 between the oscillating roller 144 and the path roller 143 shortens. When the oscillating roller 144 rotates counterclockwise, the length of the electrode sheet 200 between the oscillating roller 144 and the path roller 143 lengthens. During the rolling process of the electrode sheet 200, the oscillating roller 144 is initially positioned vertically downward as shown in FIG. 1 . When the tension of the electrode sheet 200 changes, the oscillating roller 144 receives uneven force and rotates a certain angle to maintain the tension of the electrode sheet 200. Preferably, the oscillating roller 144 is provided with an angle-sensing device that detects tension change information based on the real-time angle of the oscillating roller 144 and timely rotates the oscillating roller 144 to adjust the tension of the electrode sheet 200.

[0054] As shown in FIG. 1, according to some embodiments of the present application, preferably, the electrode sheet punching device further includes a rotating suction robot arm 150 located between the laser processing table 110 and the flaw detection module 130, and the rotating suction robot arm 150 is rotatable relative to the laser processing table 110 so as to move closer to or away from the laser processing platform. When the rotating suction robot arm 150 approaches the laser processing platform, it adsorbs the electrode sheet 200, and then rotates away from the laser processing platform to transfer the electrode sheet 200 to the flaw detection module 130.

[0055] 2, according to some embodiments of the present application, the scratch detection module 130 preferably includes a scratch detection device 131 and a conveying member 132, the electrode sheet 200 is positioned on the surface of the conveying member 132, and as the conveying member 132 travels, the electrode sheets 200 positioned on the surface of the conveying member 132 sequentially pass through the scratch detection device 131. The scratch detection device 131 is provided facing the conveying member 132 and detects the electrode sheets 200 one by one as they sequentially pass through. In this embodiment, the conveying member 132 is a conveyor, and the traveling speed of the conveying member 132 is preferably 60 m / min.

[0056] 2 , according to some embodiments of the present application, the flaw detection module 130 preferably further includes a robot gripping arm 133 and a suction cup 134. The suction cup 134 is connected to one end of the robot arm closer to the conveyor and is used to adsorb the electrode sheet 200 located on the surface of the conveying member 132 when the robot gripping arm 133 is close to the conveying member 132. The robot gripping arm 133 is rotated relative to the conveying member 132 so as to move closer to or away from the conveying member 132. When the robot gripping arm 133 moves the suction cup 134 closer to the conveying member 132, the suction cup 134 adsorbs the electrode sheet 200, and then the robot gripping arm 133 continues to rotate to transfer the electrode sheet 200.

[0057] 2, according to some embodiments of the present application, the flaw detection module 130 preferably further includes a good product collection box 135 and a bad product collection box 136, both of which are located downstream of the conveying member 132 and are used to collect the electrode sheets 200 transferred by the robot gripping arm 133. The good product collection box 135 is used to collect the acceptable electrode sheets 200 detected by the flaw detection device 131, and the bad product collection box 136 is used to collect the unacceptable electrode sheets 200 detected by the next detection device.

[0058] As shown in Figure 2, the robot gripping arm 133 is rotatable relative to the conveying member 132, the good product collection box 135, and the defective product collection box 136, and by controlling the timing at which the suction cup 134 turns on the suction, the electrode sheet 200 sucked up by the robot gripping arm 133 can be placed in the good product collection box 135 and the defective product collection box 136, respectively.

[0059] Finally, it should be noted that the above embodiments are merely for the purpose of explaining the technical aspects of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical aspects described in the above embodiments or equivalently replace some or all of the technical features therein. Such modifications or substitutions do not deviate from the essence of the corresponding technical aspects of the technical aspects of the embodiments of the present application, and all of them should be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical aspects within the scope of the utility model registration claims.

Claims

1. An electrode sheet die-cutting device used to cut an electrode sheet, an electrode sheet transport device used to transport the electrode sheet along a flow path; a laser processing table located on the side of the flow path and having a plurality of suction holes that can suction and fix the electrode sheet to a surface thereof; a laser cutting machine that is provided facing the laser processing table and emits ultrashort pulse ultraviolet light toward the electrode sheet to cut the electrode sheet; a flaw detection module located downstream of the laser processing table along the flow path and used to detect the appearance of the electrode sheet cut by the laser die cutting machine; An electrode sheet punching device characterized by the above.

2. the electrode sheet transport device includes a plurality of transport rollers that define the flow path, and at least one support roller that is used to stretch the electrode sheet; 2. The electrode sheet punching device according to claim 1.

3. the electrode sheet transport device includes a front support roller and a rear support roller located upstream and downstream of the laser processing table, respectively, along a flow path of the electrode sheet, and the electrode sheet is stretched between the front support roller and the rear support roller.

3. The electrode sheet punching device according to claim 2.

4. When the electrode sheet is stretched between the front support roller and the rear support roller, the distance between the electrode sheet and the laser processing table is 1 mm to 10 mm.

4. The electrode sheet punching device according to claim 3.

5. the electrode sheet transport device further includes a pass roller and an oscillating roller, the electrode sheet is successively stretched between the pass roller, the oscillating roller, and a front support roller, and the oscillating roller is movable relative to the pass roller and / or the front support roller so as to lengthen or shorten the length of the electrode sheet between the oscillating roller and the pass roller and / or the front support roller.

4. The electrode sheet punching device according to claim 3.

6. a rotary suction robot arm positioned between the laser processing table and the flaw detection module, the rotary suction robot arm being rotatable relative to the laser processing table so as to suction the electrode sheet and transfer it to the flaw detection module; 2. The electrode sheet punching device according to claim 1.

7. the scratch detection module includes a scratch detection device and a conveying member on whose surface the electrode sheet is located, the scratch detection device being disposed facing the conveying member so as to detect the electrode sheet; 2. The electrode sheet punching device according to claim 1.

8. the scratch detection module further includes a robot gripping arm that is rotatable relative to the conveying member so as to adsorb and transfer the electrode sheet, and a suction cup that is connected to one end of the robot arm that is close to the conveyor.

8. The electrode sheet punching device according to claim 7.

9. the scratch detection module further includes a non-defective product collection box and a defective product collection box, both of which are located downstream of the conveying member and used to collect the electrode sheets transferred by the robot gripping arm.

9. The electrode sheet punching device according to claim 8.

10. The laser die-cutting machine includes a laser generator, a filtering module, and a focusing lamp, the laser generator and the focusing lamp are all arranged facing the laser processing table, the laser generator emits an ultrashort pulse laser toward the electrode sheet, and the filtering module is located between the laser generator and the electrode sheet and filters the ultrashort pulse laser into an ultrashort pulse ultraviolet light.

2. The electrode sheet punching device according to claim 1.

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