Marking device, electrode production system and electrode marking method

Abstract

The present application provides a marking device, a pole piece production system and a pole piece marking method, which belong to the field of battery production equipment. Among them, the marking device includes a marking mechanism and a vibration mechanism. The marking mechanism is arranged on the side of the pole piece having the active material layer along the thickness direction of the pole piece. The vibration mechanism is connected to the marking mechanism, and the vibration mechanism is used to drive the marking mechanism to vibrate along the thickness direction of the pole piece, so that the marking mechanism squeezes the surface of the pole piece when rotating to form a mark on the pole piece. The marking device adopting this structure can drive the marking device to vibrate along the thickness direction of the pole piece through the vibration mechanism, thereby effectively compensating for the gap between the marking mechanism and the pole piece to ensure the marking effect of the marking mechanism on the pole piece, and there is no need to mark the pole piece through laser marking technology, thereby alleviating the phenomenon of the formation of a heat-affected zone on the pole piece after laser ablation, which is beneficial to reduce the damage to the pole piece during the marking process, so as to improve the production quality of the pole piece.

Description

Technical Field

[0001] The present application relates to the field of battery production equipment, and more specifically, to a marking device, a pole piece production system, and a pole piece marking method. Background Art

[0002] Batteries, with their outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient, are a vital component of today's new energy development. A battery cell is assembled from a positive electrode sheet, a negative electrode sheet, and a separator through winding or lamination to form an electrode assembly (wound cell or laminated cell). This is then enclosed in a casing, capped, and finally filled with electrolyte.

[0003] Since laminated cells have the advantages of high rate and high energy density over wound cells, and laminated cells can also be made into various special-shaped batteries according to different needs, laminated cells are widely used in the industry to make batteries. Traditional lamination equipment usually uses laser marking technology to mark the pole pieces, that is, the high temperature generated by the highly concentrated laser beam ablates the active material layer on one side of the pole piece, thereby forming a mark on one side of the pole piece to facilitate lamination of the pole piece. However, this marking method is very likely to cause the active material layer on one side of the pole piece to form a heat-affected zone after being laser ablated, and it is very easy to damage the pole piece, resulting in poor production quality of the pole piece. Summary of the Invention

[0004] The embodiments of the present application provide a marking device, a pole piece production system, and a pole piece marking method, which can effectively improve the production quality and production efficiency of pole pieces.

[0005] In a first aspect, an embodiment of the present application provides a marking device for marking an electrode, wherein the electrode comprises a current collector and an active material layer, and the active material layer is provided on at least one side of the current collector along the thickness direction of the electrode, and the marking device comprises a marking mechanism and a vibration mechanism; the marking mechanism is provided on the side of the electrode having the active material layer along the thickness direction of the electrode; the vibration mechanism is connected to the marking mechanism, and the vibration mechanism is used to drive the marking mechanism to vibrate along the thickness direction of the electrode, so that the marking mechanism squeezes the surface of the electrode during rotation to form a mark on the electrode.

[0006] In the above technical solution, a marking mechanism is provided on the side of the electrode having the active material layer along the thickness direction of the electrode, and the marking mechanism is connected to the vibration mechanism, so that the marking mechanism squeezes the surface of the electrode during rotation, and the vibration mechanism can also drive the marking mechanism to vibrate along the thickness direction of the electrode, so that the marking mechanism can form a mark at the position where the active material layer is squeezed. On the one hand, a marking device with such a structure does not need to mark the electrode by laser marking technology, thereby alleviating the phenomenon of forming a heat-affected zone on the electrode after laser ablation, which is beneficial to reducing the damage to the electrode during the marking process, thereby effectively improving the production quality of the electrode. On the other hand, the vibration mechanism can drive the marking device to vibrate along the thickness direction of the electrode, thereby effectively compensating for the gap between the marking mechanism and the electrode to ensure the marking effect of the marking mechanism on the electrode, and the vibration mechanism can assist the marking mechanism in squeezing the active material layer of the electrode while oscillating the active material layer, thereby helping to improve the marking efficiency of the marking device on the electrode.

[0007] In some embodiments, the scoring mechanism is configured to compress the active material layer during rotation to reduce or remove the active material layer at the compressed portion and form a scoring.

[0008] In the above technical solution, under the action of the vibration mechanism, the active material layer is vibrated and squeezed by the marking mechanism, so that the active material layer at the corresponding position can be removed or reduced, thereby forming a notch on one side of the electrode, so as to facilitate the lamination process of the electrode, and thus effectively alleviate the damage to the electrode during the marking process.

[0009] In some embodiments, the vibration mechanism includes a movable seat and a vibrating member; the marking mechanism is rotatably disposed on the movable seat; the vibrating member is connected to the movable seat and is used to drive the movable seat to vibrate along the thickness direction of the pole piece.

[0010] In the above technical solution, the vibration mechanism is provided with a movable seat and a vibration member. By rotatably connecting the marking mechanism to the movable seat, the vibration member drives the movable seat to vibrate along the thickness direction of the pole piece, which can drive the marking mechanism to vibrate along the thickness direction of the pole piece. The marking device with this structure is convenient for installation and subsequent debugging.

[0011] In some embodiments, the vibrating element is an ultrasonic transducer.

[0012] In the above technical solution, an ultrasonic transducer is used as a vibration mechanism to drive the marking mechanism to vibrate along the thickness direction of the electrode, so that the vibration mechanism can drive the marking mechanism to oscillate at high frequency, and the vibration effect is better, so that the marking mechanism can squeeze the electrode while also oscillating the active material layer of the electrode at high frequency, which is beneficial to improve the marking efficiency of the marking device on the electrode.

[0013] In some embodiments, the marking mechanism includes a roller body and a marking knife; the axis of the roller body extends along the width direction of the pole piece; the marking knife is arranged on the roller body and protrudes from the outer peripheral surface of the roller body, and the marking knife extends along the axis direction of the roller body. The marking knife is configured to squeeze the surface of the pole piece when following the rotation of the roller body.

[0014] In the above technical solution, a scoring knife is provided on the roller body, and the scoring knife protrudes from the outer peripheral surface of the roller body, so that the roller body can drive the scoring knife to squeeze the surface of the electrode during the rotation process, so that the active material layer is separated from the current collector under the squeezing action of the scoring knife, thereby forming a notch on one side of the electrode. On the one hand, the scoring mechanism of this structure makes the scoring speed of the electrode related to the rotation speed of the roller body, which is beneficial to improving and optimizing the scoring efficiency of the electrode. On the other hand, it can effectively alleviate the damage to the electrode during the scoring process, which is beneficial to improving the production quality of the electrode.

[0015] In some embodiments, the active material layer is provided on both sides of the current collector along the thickness direction of the pole piece; the marking device includes two marking mechanisms and two vibration mechanisms; the two marking mechanisms are respectively provided on both sides of the pole piece in the thickness direction of the pole piece; the two vibration mechanisms are respectively connected to the two marking mechanisms to form the notches on both sides of the pole piece.

[0016] In the above technical solution, by arranging marking mechanisms on both sides of the electrode and arranging a vibration mechanism corresponding to each marking mechanism, it is possible to meet the operational requirements of marking on both sides of the electrode, which is beneficial to optimize the production rhythm of the electrode during the marking process, so as to improve the marking efficiency and production efficiency of the electrode.

[0017] In some embodiments, the two marking mechanisms are spaced apart along the conveying direction of the electrode sheet.

[0018] In the above technical solution, the two marking mechanisms are arranged at intervals along the conveying direction of the electrode, thereby helping to reduce the interference effect between the two marking mechanisms and facilitating the installation and debugging of the marking mechanism and the vibration mechanism.

[0019] In some embodiments, the two marking mechanisms are arranged opposite to each other along the thickness direction of the pole piece.

[0020] In the above technical solution, by arranging the two marking mechanisms relatively on both sides of the pole piece along the thickness direction of the pole piece, the two marking mechanisms can cooperate with each other to provide a certain support to the pole piece, thereby facilitating the marking device to make marks on both sides of the pole piece and effectively improving the marking quality of the pole piece.

[0021] In some embodiments, the marking device further includes a support member, which is arranged in a one-to-one correspondence with the marking mechanism. The support member and the marking mechanism are arranged opposite to each other on both sides of the pole piece along the thickness direction, and the support member is used to support the pole piece.

[0022] In the above technical solution, a support member is provided corresponding to each marking mechanism, and the support member and the marking mechanism are arranged on both sides of the electrode sheet relative to each other along the thickness direction of the electrode sheet, so that the support member can provide better support to the electrode sheet during the marking process of the electrode sheet by the marking mechanism, thereby effectively improving the marking quality of the electrode sheet and helping to reduce the risk of the electrode sheet breaking during the marking process.

[0023] In a second aspect, an embodiment of the present application further provides a marking device, comprising a conveying device and the above-mentioned marking device; the conveying device is used to convey the electrode.

[0024] In some embodiments, the electrode production system further includes a dust removal device; the dust removal device is arranged downstream of the marking device along the conveying direction of the electrode, and the dust removal device is used to remove dust from the side of the electrode where the marking mechanism is provided.

[0025] In the above technical solution, the electrode production system is also provided with a dust removal device, and the dust removal device is arranged downstream of the marking device, so that the dust removal device can remove dust from the side of the electrode with the marking to reduce the dust attached to the electrode after the marking is completed, which is beneficial to improve the production quality of the electrode.

[0026] In some embodiments, the dust removal device includes a support roller and an ultrasonic dust collector; the ultrasonic dust collector and the support roller are relatively arranged on both sides of the pole piece along the thickness direction of the pole piece, and the ultrasonic dust collector and the marking mechanism are located on the same side of the pole piece.

[0027] In the above technical solution, the dust removal device is provided with a support roller and an ultrasonic dust collector. By arranging a support roller on one side of the pole piece and arranging an ultrasonic dust collector on the other side of the pole piece corresponding to the position of the support roller, the ultrasonic dust collector can be used to remove dust from the side of the pole piece with a notch. The dust removal device with such a structure can, on the one hand, improve the dust removal effect on the pole piece, and on the other hand, reduce the damage caused to the pole piece by the dust removal device during the dust removal process.

[0028] In some embodiments, the electrode production system includes two dust removal devices; the two dust removal devices are arranged at intervals along the conveying direction of the electrode, and the ultrasonic dust collectors of the two dust removal devices are respectively located on both sides of the electrode along the thickness direction of the electrode.

[0029] In the above technical solution, two dust removal devices are arranged in sequence downstream of the marking device along the conveying direction of the electrode sheet, and the ultrasonic dust collectors of the two dust removal devices are respectively located on both sides of the electrode sheet, so that dust can be removed from both sides of the electrode sheet, which is beneficial to further improve the dust removal quality of the electrode sheet.

[0030] In some embodiments, the electrode production system further includes an identification device and a detection device; the identification device is arranged upstream of the marking device along the conveying direction of the electrode, and the identification device is used to form an identification at the position of the electrode to be marked; the detection device is arranged between the identification device and the marking device along the conveying direction of the electrode, and the detection device is used to detect the identification and generate a control signal, and the marking device is configured to form the mark at the position to be marked according to the control signal.

[0031] In the above technical solution, the electrode production system is also provided with an identification device and a detection device. The identification device can identify the position of the electrode where marking is required, and the detection device can detect and provide feedback, so that the marking mechanism can squeeze the electrode, and the vibration mechanism can drive the marking mechanism to vibrate while squeezing the electrode, so as to form a mark at the position of the electrode to be marked, thereby effectively improving the marking accuracy of the electrode and helping to improve the production quality of the electrode.

[0032] In some embodiments, the marking device includes a hole-making mechanism; the hole-making mechanism is used to open a marking hole at the position to be marked on the electrode, and the detection device is used to detect the marking hole and generate the control signal.

[0033] In the above technical solution, a hole-making mechanism is used as an identification device to open an identification hole at the position to be marked on the electrode, thereby marking the position to be marked on the electrode. The identification device of this structure is simple in structure and easy to implement, and is conducive to the detection device to detect the identification hole opened at the position to be marked, thereby effectively improving the detection accuracy of the detection device.

[0034] In a third aspect, an embodiment of the present application also provides a method for marking an electrode, comprising: providing an electrode, the electrode comprising a current collector and an active material layer, the active material layer being provided on at least one side of the current collector along the thickness direction of the electrode; providing a marking device, the marking device comprising a marking mechanism and a vibration mechanism, the vibration mechanism being connected to the marking mechanism; rotating the marking mechanism and driving the marking mechanism to vibrate along the thickness direction through the vibration mechanism, so that the marking mechanism squeezes the surface of the electrode during rotation to form a notch extending along the width direction of the electrode on the active material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of a pole piece production system provided in some embodiments of the present application;

[0037] Figure 2 A front view of a pole piece production system provided in some embodiments of the present application;

[0038] Figure 3 A cross-sectional view of a pole piece provided in some embodiments of the present application;

[0039] Figure 4 for Figure 1 A partial enlarged view of point A of the pole piece production system shown;

[0040] Figure 5 A schematic diagram of the connection between the marking mechanism and the vibration mechanism provided in some embodiments of the present application;

[0041] Figure 6 A schematic diagram of the structure of a marking mechanism provided in some embodiments of the present application;

[0042] Figure 7 A schematic structural diagram of a marking device provided in some embodiments of the present application;

[0043] Figure 8 A schematic structural diagram of a marking device provided in some embodiments of the present application;

[0044] Figure 9 A schematic structural diagram of a marking device provided in some further embodiments of the present application;

[0045] Figure 10 A schematic flow chart of a pole piece marking method provided in some embodiments of the present application.

[0046] Icons: 100-pole sheet production system; 10-marking device; 11-marking mechanism; 111-roller body; 1111-connecting groove; 112-marking knife; 113-connecting part; 12-vibrating mechanism; 121-moving seat; 122-vibrating part; 13-fixed frame; 131-accommodating groove; 14-support member; 20-pole sheet; 21-current collector; 22-active material layer; 23-notch; 30-dust removal device; 31-support roller; 32-ultrasonic dust collector; 40-marking device; 41-hole making mechanism; 42-waste box; X-thickness direction of pole sheet; Y-conveying direction of pole sheet; Z-width direction of pole sheet. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0053] The term "plurality" used in this application refers to two or more (including two).

[0054] A battery cell consists of a housing, an electrode assembly, and an electrolyte. The housing holds the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The portion of the positive electrode collector not coated with the positive active material layer serves as the positive tab, allowing power to be input or output from the positive electrode sheet. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The portion of the negative electrode collector not coated with the negative active material layer serves as the negative tab, allowing power to be input or output from the negative electrode sheet. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together.

[0055] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0056] It should be noted that the electrode assembly is the component in a battery cell where the electrochemical reaction occurs. The electrode assembly may include a positive electrode sheet, a separator, and a negative electrode sheet. The electrode assembly may be a wound structure formed by winding the positive electrode sheet, separator, and negative electrode sheet to form a wound battery cell, or a stacked structure formed by stacking the positive electrode sheet, separator, and negative electrode sheet to form a laminated battery cell.

[0057] Since laminated cells have the advantages of high rate and high energy density compared to wound cells, and laminated cells can also be made into various special-shaped batteries according to different needs, laminated cells are widely used to make batteries in the industry.

[0058] The inventors found that in the production process of stacked electrode assemblies, traditional stacking equipment usually uses a pole piece punching machine to cut the pole pieces for stacking. Although this can meet the stacking requirements, burrs are very likely to appear on the cut edges of the pole pieces during the cutting process, resulting in poor production quality of the pole pieces. There is a risk that the burrs on the pole pieces will damage the isolation membrane, and since the pole pieces need to be cut individually, the production efficiency of the battery cells is low. In order to solve the risk of burrs on the electrode due to cutting, in the existing technology, the active material layer on both sides of the electrode is marked (that is, a trace line is formed on the surface of the electrode) to eliminate the need for cutting the electrode, thereby facilitating the stacking of the electrode. The existing electrode marking usually adopts laser marking technology, that is, the high temperature generated by the highly concentrated laser beam is used to ablate the active material layer on one side of the electrode, thereby forming a trace line on one side of the electrode. However, this marking method, on the one hand, causes the active material layer on one side of the electrode to form a heat-affected zone after being laser ablated, and is very likely to cause damage to the electrode, which is not conducive to improving the production quality of the electrode. On the other hand, when it is necessary to increase the moving speed of the electrode, it is very easy for the laser beam to fail to ablate the active material layer on one side of the electrode, resulting in the inability to improve the production efficiency of the electrode, which is not conducive to improving and optimizing the production rhythm of the electrode.

[0059] Based on the above considerations, and to address the issues of poor electrode production quality and low production efficiency, the inventors, after in-depth research, designed a marking device comprising a marking mechanism and a vibrating mechanism. The marking mechanism is disposed along the thickness of the electrode, on the side of the electrode having the active material layer. The vibrating mechanism is connected to the marking mechanism and is used to drive the marking mechanism to vibrate along the thickness of the electrode, causing the marking mechanism to compress the surface of the electrode as it rotates, thereby forming a notch on the electrode.

[0060] In a marking device of this structure, a marking mechanism is arranged on the side of the pole piece having the active material layer along the thickness direction of the pole piece, and the marking mechanism is connected to a vibration mechanism, so that the marking mechanism squeezes the surface of the pole piece during rotation, and the vibration mechanism can also drive the marking mechanism to vibrate along the thickness direction of the pole piece, so that the marking mechanism can form a mark at the position where the active material layer is squeezed. On the one hand, a marking device with this structure does not need to mark the pole piece by laser marking technology, thereby alleviating the phenomenon of heat-affected zone formation after laser ablation of the pole piece, which is beneficial to reducing the damage to the pole piece during the marking process, thereby effectively improving the production quality of the pole piece. On the other hand, the vibration mechanism can drive the marking device to vibrate along the thickness direction of the pole piece, thereby effectively compensating for the gap between the marking mechanism and the pole piece to ensure the marking effect of the marking mechanism on the pole piece, and the vibration mechanism can assist the marking mechanism in squeezing the active material layer of the pole piece while oscillating the active material layer, thereby helping to improve the marking efficiency of the marking device on the pole piece.

[0061] An embodiment of the present application provides a pole piece production system, which can improve the existing pole piece production system, which is very easy to damage the pole piece during the marking process, resulting in poor production quality of the pole piece and low marking efficiency of the pole piece, which is not conducive to improving and optimizing the production rhythm of the pole piece. The specific structure of the pole piece production system is described in detail below with reference to the accompanying drawings.

[0062] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a pole piece production system 100 provided in some embodiments of the present application. Figure 2 This is a front view of a pole piece production system 100 provided in some embodiments of the present application. The present application provides a pole piece production system 100, which includes a marking device 10 and a conveying device. The conveying device is used to convey the pole piece 20, and the marking device 10 is used to mark the pole piece 20.

[0063] In some embodiments, see Figure 3 As shown, Figure 3 This is a cross-sectional view of a pole piece 20 provided in some embodiments of the present application. The pole piece 20 includes a current collector 21 and an active material layer 22. Along the thickness direction X of the pole piece, the active material layer 22 is provided on at least one side of the current collector 21.

[0064] For example, in Figure 3 In the embodiment, along the thickness direction X of the electrode sheet, both sides of the current collector 21 are coated with an active material layer 22 .

[0065] According to some embodiments of the present application, referring to Figure 1 and Figure 2 , and please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 The partial enlarged view of A of the pole piece production system 100 is shown. Figure 5 Schematic diagram of the connection between the marking mechanism 11 and the vibration mechanism 12 provided in some embodiments of the present application. Embodiments of the present application provide a marking device 10, comprising a marking mechanism 11 and a vibration mechanism 12. The marking mechanism 11 is disposed on a side of the electrode 20 having the active material layer 22 along the thickness direction X of the electrode. The vibration mechanism 12 is connected to the marking mechanism 11 and is configured to drive the marking mechanism 11 to vibrate along the thickness direction X of the electrode, so that the marking mechanism 11 presses against the surface of the electrode 20 during rotation, thereby forming a notch 23 on the electrode 20.

[0066] The vibration mechanism 12 drives the marking mechanism 11 to vibrate along the thickness direction X of the electrode. The structure of the vibration mechanism 12 can be various, such as an ultrasonic transducer, a cylinder or an electric push rod.

[0067] The vibration mechanism 12 is used to drive the marking mechanism 11 to vibrate along the thickness direction X of the electrode, so that the marking mechanism 11 squeezes the surface of the electrode 20 during rotation. That is to say, the marking mechanism 11 can also rotate relative to the vibration mechanism 12, and can squeeze the surface of the electrode 20 during the rotation process, so that the vibration mechanism 12 drives the marking mechanism 11 to vibrate the electrode 20 while the marking mechanism 11 squeezes the electrode 20, thereby removing the active material at the position where the active material layer 22 is squeezed, so as to form a notch 23 on one side of the electrode 20.

[0068] Optionally, in Figure 4 and Figure 5 In the embodiment, the marking device 10 further includes a fixing frame 13, which is used to be fixed to a fixed object and is arranged on both sides of the electrode in the width direction Z. The fixing frame 13 serves to provide a mounting position for the marking mechanism 11 and the vibration mechanism 12. The marking mechanism 11 is rotatably and movably arranged on the fixing frame 13 along the thickness direction X of the electrode, and the vibration mechanism 12 is mounted on the fixing frame 13.

[0069] By arranging a marking mechanism 11 on the side of the pole piece 20 having the active material layer 22 along the thickness direction X of the pole piece, and connecting the marking mechanism 11 to the vibration mechanism 12, so that the marking mechanism 11 squeezes the surface of the pole piece 20 during the rotation, the vibration mechanism 12 can also drive the marking mechanism 11 to vibrate along the thickness direction X of the pole piece, so that the marking mechanism 11 can form a mark 23 at the position where the active material layer 22 is squeezed. On the one hand, the marking device 10 with such a structure does not need to mark the pole piece 20 by laser marking technology, thereby alleviating the heat generated by the pole piece 20 after being ablated by the laser. The phenomenon of the affected area is beneficial to reducing the damage to the electrode 20 during the marking process, thereby effectively improving the production quality of the electrode 20. On the other hand, the vibration mechanism 12 can drive the marking device 10 to vibrate along the thickness direction X of the electrode, thereby effectively compensating for the gap between the marking mechanism 11 and the electrode 20 to ensure the marking effect of the marking mechanism 11 on the electrode 20, and the vibration mechanism 12 can assist the marking mechanism 11 in squeezing the active material layer 22 of the electrode 20 while oscillating the active material layer 22, thereby helping to improve the marking efficiency of the marking device 10 on the electrode 20.

[0070] According to some embodiments of the present application, the scoring mechanism 11 is configured to squeeze the active material layer 22 during rotation, so as to reduce or remove the active material layer 22 at the squeezed portion and form the scoring 23 .

[0071] Among them, the active material layer 22 at the squeezed position is reduced or removed and a notch 23 is formed, that is, the marking mechanism 11 can squeeze the active material layer 22 on one side of the electrode 20 during the rotation process, and the marking mechanism 11 can also oscillate the squeezed position of the active material layer 22 under the drive of the vibration mechanism 12, thereby removing or reducing the active material layer 22 at this position to form a notch 23.

[0072] Under the action of the vibration mechanism 12, the active material layer 22 is vibrated and squeezed by the marking mechanism 11, so that the active material layer 22 at the corresponding position can be removed or reduced, thereby forming a notch 23 on one side of the electrode 20, so as to facilitate the lamination process of the electrode 20, thereby effectively alleviating the damage to the electrode 20 during the marking process.

[0073] According to some embodiments of this application, please refer to Figure 4 and Figure 5 The vibration mechanism 12 includes a moving seat 121 and a vibrating member 122. The marking mechanism 11 is rotatably disposed on the moving seat 121. The vibrating member 122 is connected to the moving seat 121 and is used to drive the moving seat 121 to vibrate along the thickness direction X of the pole piece.

[0074] Among them, the movable seat 121 is movably arranged on the fixed frame 13 along the thickness direction X of the pole piece, and the marking mechanism 11 is rotatably connected to the movable seat 121, so that the vibrating member 122 can drive the marking mechanism 11 to vibrate along the thickness direction X of the pole piece when driving the movable seat 121 to vibrate along the thickness direction X of the pole piece.

[0075] For example, the fixed frame 13 is provided with a receiving groove 131 for receiving the movable seat 121. The movable seat 121 is movably clamped in the receiving groove 131 along the thickness direction X of the electrode sheet. One end of the marking mechanism 11 in the width direction Z of the electrode sheet is rotatably connected to the movable seat 121. This structure enables the receiving groove 131 to play a certain guiding and limiting role for the movable seat 121, thereby improving the structural stability of the marking device 10.

[0076] Optionally, in Figure 4 In the figure, the vibration mechanism 12 includes two movable seats 121 and two vibrating members 122. The marking mechanism 11 is connected to the movable seats 121 at both ends in the width direction Z of the pole piece, and each movable seat 121 is correspondingly provided with a vibrating member 122, so that the two vibrating members 122 cooperate to drive a marking mechanism 11 to vibrate along the thickness direction X of the pole piece. The marking device 10 with such a structure is conducive to improving the stability of the marking mechanism 11 during the vibration process.

[0077] Exemplarily, the vibrating member 122 is an ultrasonic transducer, and the movable base 121 is connected to the output end of the ultrasonic transducer. The ultrasonic transducer is used as the vibrating mechanism 12 to drive the marking mechanism 11 to vibrate along the thickness direction X of the electrode piece, so that the vibrating mechanism 12 can drive the marking mechanism 11 to oscillate at high frequency, resulting in a better vibration effect. This allows the marking mechanism 11 to simultaneously oscillate the active material layer 22 of the electrode piece 20 at high frequency while squeezing the electrode piece 20, thereby facilitating improved marking efficiency of the marking device 10 on the electrode piece 20. The specific structure of the ultrasonic transducer can be found in related art and will not be elaborated on here.

[0078] By rotatably connecting the marking mechanism 11 to the movable seat 121, the movable seat 121 is driven to vibrate along the thickness direction X of the pole piece through the vibrating member 122, which can drive the marking mechanism 11 to vibrate along the thickness direction X of the pole piece. This structure of the marking device 10 is convenient for installation and subsequent debugging.

[0079] According to some embodiments of the present application, referring to Figure 4 and Figure 5 , and please refer to Figure 6 , Figure 6Schematic diagram of the structure of the marking mechanism 11 provided in some embodiments of the present application. The marking mechanism 11 includes a roller body 111 and a marking knife 112. The axis of the roller body 111 extends along the width direction Z of the pole piece. The marking knife 112 is provided on the roller body 111 and protrudes from the outer peripheral surface of the roller body 111. The marking knife 112 extends along the axis direction of the roller body 111. The marking knife 112 is configured to squeeze the surface of the pole piece 20 as the roller body 111 rotates.

[0080] The axis of the roller 111 extends along the width direction Z of the pole piece, that is, the roller 111 is arranged along the width direction Z of the pole piece, and the rotation axis of the roller 111 extends along the width direction Z of the pole piece. The scoring knife 112 extends along the axis of the roller 111, that is, the length direction of the scoring knife 112 is the width direction Z of the pole piece, so that the scoring knife 112 can press the surface of the pole piece 20 when rotating with the roller 111, thereby removing the active material from the active material layer 22 at that location under the drive of the vibration mechanism 12, thereby forming a score 23 on one side of the pole piece 20.

[0081] Optionally, the marking knife 112 protrudes from the outer circumference of the roller body 111, that is, the outer circumference of the roller body 111 is provided with a marking knife 112 for squeezing the surface of the pole piece 20. The marking knife 112 and the roller body 111 can be an integral structure or a separate structure. When the marking knife 112 and the roller body 111 are an integral structure, the marking knife 112 and the roller body 111 can be made by casting or milling. When the marking knife 112 and the roller body 111 are a separate structure, the marking knife 112 can be connected to the roller body 111 by welding, bolting, clamping or bonding.

[0082] In some embodiments, the marking knife 112 is detachably connected to the roller body 111. By detachably connecting the marking knife 112 to the roller body 111, the marking knife 112 can be quickly disassembled and replaced, which is beneficial for repairing the marking knife 112 during later use and is convenient for replacing different types of marking knives 112 to meet the marking requirements of different types of pole pieces 20. For example, it is possible to form notches 23 of different widths on the pole piece 20, thereby helping to expand the scope of application of the marking device 10.

[0083] There are many ways to detachably connect the scarring knife 112 to the roller body 111. For example, the scarring knife 112 can be detachably connected to the roller body 111 by means of bolts, screws, or clamps. Figure 6In the figure, the outer peripheral surface of the roller body 111 is provided with a connecting groove 1111 extending along the axial direction of the roller body 111, and the marking mechanism 11 also includes a connecting member 113, which is clamped in the connecting groove 1111, and the marking knife 112 is connected to the side of the connecting portion away from the connecting groove 1111 in the radial direction of the roller body 111, so that the marking knife 112 protrudes from the outer peripheral surface of the roller body 111, thereby realizing a detachable connection between the marking knife 112 and the roller body 111.

[0084] Optionally, the width of the marking knife 112 in the circumferential direction of the roller body 111 gradually decreases as it moves away from the roller body 111 along the radial direction of the roller body 111. In other words, when the marking knife 112 is pressed against one side of the electrode sheet 20, the width of the marking knife 112 in the conveying direction Y of the electrode sheet gradually decreases as it moves away from the roller body 111.

[0085] Wherein, along the radial direction of the roller body 111, the end of the marking knife 112 away from the roller body 111 is an arc surface or a plane. Figure 6 In the embodiment, the end of the marking knife 112 away from the roller body 111 is a plane.

[0086] It should be noted that in Figure 6 In the embodiment, each roller body 111 is provided with a corresponding marking knife 112. Of course, in other embodiments, each roller body 111 can also be provided with multiple marking knives 112, and the multiple marking knives 112 are arranged at intervals along the circumference of the roller body 111 to improve the marking efficiency of the pole piece 20.

[0087] By arranging a scoring knife 112 on the roller body 111, and the scoring knife 112 protrudes from the outer peripheral surface of the roller body 111, the roller body 111 can drive the scoring knife 112 to squeeze the surface of the electrode 20 during the rotation process, so that the active material layer 22 is separated from the collector 21 under the squeezing action of the scoring knife 112, thereby forming a score 23 on one side of the electrode 20. On the one hand, the scoring mechanism 11 with this structure makes the scoring speed of the electrode 20 related to the rotation speed of the roller body 111, which is beneficial to improving and optimizing the scoring efficiency of the electrode 20. On the other hand, it can effectively alleviate the damage to the electrode 20 during the scoring process, which is beneficial to improving the production quality of the electrode 20.

[0088] According to some embodiments of this application, see Figure 3 、 Figure 4 and Figure 5 As shown, active material layers 22 are provided on both sides of the current collector 21 along the thickness direction X of the electrode sheet. The marking device 10 includes two marking mechanisms 11 and two vibration mechanisms 12. The two marking mechanisms 11 are respectively provided on both sides of the electrode sheet 20 in the thickness direction X. The two vibration mechanisms 12 are respectively connected to the two marking mechanisms 11 to form notches 23 on both sides of the electrode sheet 20.

[0089] In the above description, a marking mechanism 11 is provided on both sides of the pole piece 20, and each marking mechanism 11 is correspondingly provided with a vibration mechanism 12, so that the vibration mechanism 12 and the corresponding marking mechanism 11 can cooperate to remove the active material layer 22 on one side of the pole piece 20, thereby forming a notch 23 on the corresponding side of the pole piece 20.

[0090] It should be noted that in Figure 4 In the embodiment, a marking mechanism 11 is provided on each side of the pole piece 20. Of course, in other embodiments, two, three or four marking mechanisms 11 can also be provided on each side of the pole piece 20, and a vibration mechanism 12 is provided corresponding to each marking mechanism 11.

[0091] By arranging a marking mechanism 11 on both sides of the pole piece 20 and arranging a vibration mechanism 12 corresponding to each marking mechanism 11, the operational requirements of marking on both sides of the pole piece 20 can be met, which is beneficial to optimizing the production rhythm of the pole piece 20 during the marking process, so as to improve the marking efficiency and production efficiency of the pole piece 20.

[0092] According to some embodiments of this application, please refer to Figure 4 and Figure 5 , and please refer to Figure 7 , Figure 7 Schematic diagram of the structure of the marking device 10 provided in some embodiments of the present application. Two marking mechanisms 11 are arranged at intervals along the conveying direction Y of the electrode.

[0093] Among them, the two marking mechanisms 11 are arranged at intervals along the conveying direction Y of the electrode sheet, that is, the two marking mechanisms 11 are arranged in sequence along the conveying direction Y of the electrode sheet, so that there is a distance between the two marking mechanisms 11 in the conveying direction Y of the electrode sheet.

[0094] By arranging the two marking mechanisms 11 at intervals along the conveying direction Y of the pole piece, it is beneficial to reduce the interference between the two marking mechanisms 11, and facilitate the installation and debugging of the marking mechanism 11 and the vibration mechanism 12, and can form staggered notches 23 on both sides of the pole piece 20 to meet different lamination requirements.

[0095] In some embodiments, see Figure 3 、 Figure 4 and Figure 7 As shown, the marking device 10 further includes a support member 14 , which is arranged in a one-to-one correspondence with the marking mechanism 11 . The support member 14 and the marking mechanism 11 are arranged relatively on both sides of the pole piece 20 along the thickness direction X of the pole piece. The support member 14 is used to support the pole piece 20 .

[0096] Among them, each support member 14 and a marking mechanism 11 are correspondingly arranged on both sides of the pole piece 20, and the support member 14 is connected to the fixing frame 13. The support member 14 plays the role of supporting the pole piece 20, thereby facilitating the marking mechanism 11 to mark on the side of the pole piece 20 away from the support member 14.

[0097] For example, in Figure 7 In the embodiment, the support member 14 is a roller disposed on the side of the electrode 20 facing away from the marking mechanism 11. The roller is rotatably connected to the fixed frame 13 at both ends of its axial direction. This structure of the support member 14 helps reduce friction between the electrode 20 and the support member 14, thereby helping to reduce damage to the electrode 20. Of course, in other embodiments, the support member 14 can also be a support plate or support block.

[0098] By providing a support member 14 corresponding to each marking mechanism 11, and the support member 14 and the marking mechanism 11 are relatively arranged on both sides of the electrode 20 along the thickness direction X of the electrode, the support member 14 can provide better support for the electrode 20 during the process of the marking mechanism 11 marking the electrode 20, thereby effectively improving the marking quality of the electrode 20 and helping to reduce the risk of the electrode 20 breaking during the marking process.

[0099] According to some embodiments of this application, please refer to Figure 8 , Figure 8 Schematic diagram of the structure of the marking device 10 provided in some embodiments of the present application. Two marking mechanisms 11 are arranged opposite to each other along the thickness direction X of the electrode.

[0100] Among them, along the thickness direction X of the pole piece, the two marking mechanisms 11 are symmetrically arranged on both sides of the pole piece 20 to form symmetrically arranged notches 23 on both sides of the pole piece 20. That is to say, when the marking knife 112 of the marking mechanism 11 on one side of the pole piece 20 is pressed on the pole piece 20, the marking knife 112 of the marking mechanism 11 on the other side of the pole piece 20 is also pressed on the pole piece 20, so that the marking knives 112 of the two marking mechanisms 11 can simultaneously press both sides of the pole piece 20, thereby, by symmetrically arranging the two marking mechanisms 11 on both sides of the pole piece 20 along the thickness direction X of the pole piece, the marking device 10 can form two symmetrically arranged notches 23 on both sides of the pole piece 20, thereby meeting a marking requirement of the pole piece 20.

[0101] Of course, the structure of the marking device 10 is not limited to this. In some embodiments, please refer to Figure 9 , Figure 9Schematic diagram of the structure of the marking device 10 provided in some further embodiments of the present application. Along the radial direction of the roller body 111 of the marking mechanism 11, the roller body 111 has an abutment position arranged opposite to the marking knife 112. When the abutment position of one roller body 111 abuts one side of the pole piece 20, the marking knife 112 on the other roller body 111 presses against the other side of the pole piece 20, forming staggered notches 23 on both sides of the pole piece 20.

[0102] Among them, when the abutting position of the roller body 111 on one side of the pole piece 20 abuts against the pole piece 20, the marking knife 112 on the roller body 111 on the other side of the pole piece 20 is squeezed onto the pole piece 20, so that the rotation angles of the two marking knives 112 differ by 180 degrees, so that two staggered notches 23 can be formed on both sides of the pole piece 20 to meet a marking requirement of the pole piece 20.

[0103] By arranging the two marking mechanisms 11 relatively on both sides of the pole piece 20 along the thickness direction X of the pole piece, the two marking mechanisms 11 can cooperate with each other to provide a certain support to the pole piece 20, thereby facilitating the marking device 10 to perform marking on both sides of the pole piece 20 and effectively improving the marking quality of the pole piece 20.

[0104] According to some embodiments of the present application, the present application also provides a pole piece production system 100, see Figure 1 and Figure 2 As shown, the electrode production system 100 includes a conveying device and a marking device 10 of any of the above schemes, and the conveying device is used to convey the electrode 20.

[0105] For example, the conveying device can be a roller conveyor or a plate chain conveyor, etc., and the conveying device is used to provide driving force for the electrode 20 to drive the electrode 20 to move along its electrode conveying direction Y. The specific structure of the conveying device can be found in the relevant technology and will not be repeated here.

[0106] According to some embodiments of this application, please continue to refer to Figure 1 and Figure 2 The electrode production system 100 further includes a dust removal device 30. The dust removal device 30 is disposed downstream of the marking device 10 along the electrode conveying direction Y. The dust removal device 30 is used to remove dust from the side of the electrode 20 where the marking mechanism 11 is disposed.

[0107] Among them, the dust removal device 30 is arranged downstream of the marking device 10 along the conveying direction Y of the electrode, that is, along the conveying direction Y of the electrode, the marking device 10 and the dust removal device 30 are arranged in sequence, that is, the production process sequence of the electrode 20 is to pass through the marking device 10 first and then pass through the dust removal device 30.

[0108] Optionally, the dust removal device 30 can be of multiple types, such as an ultrasonic dust removal device, a negative pressure suction device or an adhesion device, wherein the blowing device is used to extract dust attached to the surface of the pole piece 20, and the adhesion device is used to adhere the dust attached to the surface of the pole piece 20.

[0109] The electrode production system 100 is also provided with a dust removal device 30, and the dust removal device 30 is arranged downstream of the marking device 10, so that the dust removal device 30 can remove dust from the side of the electrode 20 having the marking 23, so as to reduce the dust attached to the electrode 20 after the marking is completed, which is beneficial to improve the production quality of the electrode 20.

[0110] According to some embodiments of this application, please continue to refer to Figure 1 and Figure 2 The dust removal device 30 includes a support roller 31 and an ultrasonic dust remover 32. The ultrasonic dust remover 32 and the support roller 31 are arranged on both sides of the pole piece 20 along the thickness direction X of the pole piece, and the ultrasonic dust remover 32 and the marking mechanism 11 are located on the same side of the pole piece 20.

[0111] The support roller 31 is disposed on the side of the electrode 20 facing away from the ultrasonic dust collector 32. The support roller 31 supports the electrode 20 so that the ultrasonic dust collector 32 can remove dust from the side of the electrode 20 where the notch 23 is formed. The ultrasonic dust collector 32 is a device that uses the sonic vibration of dust-laden gas to cause dust particles to resonate, causing them to collide with each other, agglomerate into larger particles, and settle, thereby achieving dust removal. The specific structure of the ultrasonic dust collector 32 can be found in related art and will not be described in detail here.

[0112] It should be noted that, in other embodiments, the dust removal device 30 can also be other structures. For example, the dust removal device 30 includes a support roller 31 and a negative pressure suction mechanism. The negative pressure suction mechanism and the support roller 31 are relatively arranged on both sides of the pole piece 20 along the thickness direction X of the pole piece, and the negative pressure suction mechanism and the marking mechanism 11 are located on the same side of the pole piece 20. The negative pressure suction mechanism is used to suck air toward the side of the pole piece 20 where the notch 23 is formed, thereby removing dust from the pole piece 20.

[0113] By arranging a support roller 31 on one side of the pole piece 20 and arranging an ultrasonic dust collector 32 on the other side of the pole piece 20 corresponding to the position of the support roller 31, the ultrasonic dust collector 32 can remove dust from the side of the pole piece 20 having the notch 23. The dust removal device 30 with such a structure can, on the one hand, improve the dust removal effect on the pole piece 20, and on the other hand, reduce the damage caused to the pole piece 20 by the dust removal device 30 during the dust removal process.

[0114] According to some embodiments of this application, please continue to refer to Figure 1 and Figure 2The electrode production system 100 includes two dust removal devices 30, which are arranged at intervals along the conveying direction Y of the electrode. The ultrasonic dust collectors 32 of the two dust removal devices 30 are respectively located on both sides of the electrode 20 along the thickness direction X of the electrode.

[0115] Among them, the two dust removal devices 30 are arranged in sequence downstream of the marking device 10 along the conveying direction Y of the electrode piece, and the two ultrasonic dust removers 32 are respectively located on both sides of the electrode piece 20 to remove dust from both sides of the electrode piece 20.

[0116] By arranging two dust removal devices 30 in sequence downstream of the marking device 10 along the conveying direction Y of the electrode, and the ultrasonic dust collectors 32 of the two dust removal devices 30 are respectively located on both sides of the electrode 20, dust can be removed from both sides of the electrode 20, which is beneficial to further improve the dust removal quality of the electrode 20.

[0117] According to some embodiments of this application, please continue to refer to Figure 1 and Figure 2 The electrode production system 100 further includes a marking device 40 and a detection device. The marking device 40 is disposed upstream of the marking device 10 along the electrode conveying direction Y. The marking device 40 is used to form a mark at the position to be marked on the electrode 20. The detection device is disposed between the marking device 40 and the marking device 10 along the electrode conveying direction Y. The detection device is used to detect the mark and generate a control signal. The marking device 10 is configured to form a notch 23 at the position to be marked according to the control signal.

[0118] Among them, the marking device 40 is arranged upstream of the marking device 10 along the conveying direction Y of the electrode, that is, along the conveying direction Y of the electrode, the marking device 40 and the marking device 10 are arranged in sequence, that is, the production process sequence of the electrode 20 is to pass through the marking device 40 first and then pass through the marking device 10.

[0119] The marking device 40 is used to form a mark at the position to be marked on the pole piece 20. The mark can be of various types, and can be a point marked at the position to be marked on the pole piece 20, or a hole made at the position to be marked on the pole piece 20. Of course, it can also be a scratch formed at the position to be marked on the pole piece 20, etc.

[0120] Optionally, the detection device may be an infrared sensor, a photosensor, or a distance sensor, etc. The detection device is used to detect the mark formed on the electrode 20 by the marking device 40 and transmit the generated control signal to the marking device 10 so that the marking device 10 can mark the electrode 20.

[0121] The electrode production system 100 is also provided with an identification device 40 and a detection device. The identification device 40 can identify the position of the electrode 20 where the mark is required, and the detection device can detect and provide feedback, so that the marking mechanism 11 can squeeze the electrode 20, and the vibration mechanism 12 can drive the marking mechanism 11 to vibrate while the marking mechanism 11 squeezes the electrode 20, so as to form a mark 23 at the position to be marked on the electrode 20, thereby effectively improving the marking accuracy of the electrode 20 and helping to improve the production quality of the electrode 20.

[0122] According to some embodiments of this application, please continue to refer to Figure 1 and Figure 2 The marking device 40 includes a hole-making mechanism 41. The hole-making mechanism 41 is used to open a marking hole at a position to be marked on the electrode 20, and the detection device is used to detect the marking hole and generate a control signal.

[0123] The hole-making mechanism 41 is disposed on one side of the electrode 20 and is used to punch a hole at a position on the electrode 20 where a mark is to be made, thereby forming a marking hole. The marking hole is the mark formed by the marking device 40 on the electrode 20. The specific structure of the hole-making mechanism 41 can be found in the relevant art and will not be described in detail here.

[0124] Exemplarily, there are two hole-making mechanisms 41 , which are spaced apart along the width direction Z of the pole piece to open two marking holes on the pole piece 20 , thereby facilitating improving the detection accuracy of the inspection device.

[0125] In some embodiments, the identification device 40 may also include a waste box 42, which is arranged on the side of the pole piece 20 away from the hole-making mechanism 41. The waste box 42 is used to receive the waste generated by the pole piece 20 during the process of opening the identification hole to reduce the risk of waste scattering.

[0126] A hole-making mechanism 41 is used as an identification device 40 to open an identification hole at the position to be marked on the electrode 20, thereby marking the position to be marked on the electrode 20. The identification device 40 of this structure is simple in structure and easy to implement, and is beneficial for the detection device to detect the identification hole opened at the position to be marked, thereby effectively improving the detection accuracy of the detection device.

[0127] According to some embodiments of the present application, see Figure 1-Figure 7As shown, the present application provides a marking device 10, which includes a fixing frame 13, two marking mechanisms 11, two vibrating mechanisms 12 and two supporting members 14. The two marking mechanisms 11 are respectively arranged on both sides of the pole piece 20 and are arranged at intervals along the conveying direction Y of the pole piece. The marking mechanism 11 includes a roller body 111 and a marking knife 112. The axis of the roller body 111 extends along the width direction Z of the pole piece. The marking knife 112 is provided on the roller body 111 and protrudes from the outer peripheral surface of the roller body 111. The marking knife 112 extends along the axis direction of the roller body 111. The marking knife 112 is configured to squeeze the surface of the pole piece 20 when following the rotation of the roller body 111. Each vibration mechanism 12 is connected to a marking mechanism 11. The vibration mechanism 12 is used to drive the marking mechanism 11 to vibrate along the thickness direction X of the electrode, so that the marking mechanism 11 squeezes the surface of the electrode 20 during rotation to remove the active material layer 22 and form a mark 23. The vibration mechanism 12 includes a movable seat 121 and a vibrating member 122. The movable seat 121 is movably arranged on the fixed frame 13 along the thickness direction X of the electrode. One end of the roller body 111 is rotatably connected to the movable seat 121. The vibrating member 122 is connected to the movable seat 121 and is used to drive the movable seat 121 to vibrate along the thickness direction X of the electrode. Each support member 14 is arranged corresponding to the roller body 111 of a marking mechanism 11. The support member 14 and the roller body 111 of the marking mechanism 11 are arranged on both sides of the electrode 20 relative to each other along the thickness direction X of the electrode. The support member 14 is used to support the electrode 20. Among them, the vibrating member 122 is an ultrasonic transducer.

[0128] The present application also provides a method for making a mark on a pole piece. Figure 10 , Figure 10 A schematic flow chart of a method for making a mark on a pole piece provided in some embodiments of the present application. The method for making a mark on a pole piece includes:

[0129] S100: Providing a pole piece 20, the pole piece 20 comprising a current collector 21 and an active material layer 22, wherein the active material layer 22 is provided on at least one side of the current collector 21 along a thickness direction X of the pole piece;

[0130] S200: providing a marking device 10, the marking device 10 comprising a marking mechanism 11 and a vibration mechanism 12, the vibration mechanism 12 being connected to the marking mechanism 11;

[0131] S300: Rotate the marking mechanism 11 and drive the marking mechanism 11 to vibrate along the thickness direction X of the electrode through the vibration mechanism 12, so that the marking mechanism 11 presses the surface of the electrode 20 during rotation to form a notch 23 extending along the width direction Z of the electrode on the active material layer 22.

[0132] It should be noted that, for the relevant structure of the marking device 10 used in the above-mentioned electrode marking method, reference can be made to the marking device 10 provided in the above-mentioned embodiments, and no further details will be given here.

[0133] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0134] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A marking device for marking an electrode, wherein the electrode comprises a current collector and an active material layer, wherein the active material layer is provided on at least one side of the current collector along the thickness direction of the electrode, characterized in that: The marking device comprises: a marking mechanism, provided along the thickness direction on a side of the electrode having the active material layer; and a vibrating mechanism connected to the marking mechanism, the vibrating mechanism being used to drive the marking mechanism to vibrate along the thickness direction, so that the marking mechanism presses the surface of the pole piece during rotation to form a notch on the pole piece; The scoring mechanism is configured to compress the active material layer during rotation to reduce or remove the active material layer at the compressed portion and form a scoring.

2. The marking device according to claim 1, characterized in that The vibration mechanism comprises: a movable seat, the marking mechanism being rotatably disposed on the movable seat; The vibrating member is connected to the movable base and is used for driving the movable base to vibrate along the thickness direction.

3. The marking device according to claim 2, characterized in that The vibrating element is an ultrasonic transducer.

4. The marking device according to claim 1, characterized in that The marking mechanism comprises: a roller body, wherein the axis of the roller body extends along the width direction of the pole piece; A marking knife is provided on the roller body and protrudes from the outer peripheral surface of the roller body. The marking knife extends along the axis direction of the roller body and is configured to squeeze the surface of the pole piece when following the rotation of the roller body.

5. The marking device according to any one of claims 1 to 4, characterized in that: The active material layer is provided on both sides of the current collector along the thickness direction; The marking device comprises: The two marking mechanisms are respectively arranged on both sides of the electrode in the thickness direction; The two vibration mechanisms are respectively connected to the two marking mechanisms to form the markings on both sides of the pole piece.

6. The marking device according to claim 5, characterized in that The two marking mechanisms are arranged at intervals along the conveying direction of the electrode piece.

7. The marking device according to claim 5, characterized in that The two marking mechanisms are arranged opposite to each other along the thickness direction.

8. The marking device according to any one of claims 1 to 4, characterized in that: The marking device also includes: A support member is provided in a one-to-one correspondence with the marking mechanism. The support member and the marking mechanism are arranged opposite to each other on both sides of the pole piece along the thickness direction. The support member is used to support the pole piece.

9. A pole piece production system, characterized in that: include: The marking device according to any one of claims 1 to 8; as well as A conveying device is used to convey the pole piece.

10. The electrode production system according to claim 9, characterized in that: The pole piece production system also includes: A dust removal device is provided downstream of the marking device along the conveying direction of the electrode piece, and the dust removal device is used to remove dust from the side of the electrode piece where the marking mechanism is provided.

11. The electrode production system according to claim 10, characterized in that: The dust removal device comprises: Support rollers; The ultrasonic dust collector and the supporting roller are arranged on both sides of the pole piece in a thickness direction of the pole piece, and the ultrasonic dust collector and the marking mechanism are located on the same side of the pole piece.

12. The electrode production system according to claim 11, characterized in that: The pole piece production system includes: The two dust removal devices are arranged at intervals along the conveying direction, and the ultrasonic dust removers of the two dust removal devices are respectively located on both sides of the pole piece in the thickness direction.

13. The electrode production system according to any one of claims 9 to 12, characterized in that: The pole piece production system also includes: a marking device, arranged upstream of the marking device along the conveying direction of the electrode piece, the marking device being used to form a mark on the position of the electrode piece to be marked; A detection device is arranged between the marking device and the marking device along the conveying direction, and the detection device is used to detect the mark and generate a control signal. The marking mechanism is configured to form the mark at the position to be marked according to the control signal.

14. The electrode production system according to claim 13, characterized in that: The marking device comprises: The hole-making mechanism is used to open a marking hole at the position to be marked on the electrode, and the detection device is used to detect the marking hole and generate the control signal.

15. A method for marking an electrode, characterized in that: include: Providing a pole piece, the pole piece comprising a current collector and an active material layer, wherein the active material layer is provided on at least one side of the current collector along the thickness direction of the pole piece; Providing a marking device, the marking device comprising a marking mechanism and a vibration mechanism, the vibration mechanism being connected to the marking mechanism; Rotating the marking mechanism and driving the marking mechanism to vibrate along the thickness direction through a vibration mechanism, so that the marking mechanism presses the surface of the electrode sheet during rotation to form a notch extending along the width direction of the electrode sheet on the active material layer; The scoring mechanism is configured to compress the active material layer during rotation to reduce or remove the active material layer at the compressed portion and form a scoring.

Images