Device for accelerating rebound of pole piece and pole piece processing equipment

Abstract

The embodiment of the utility model provides a device for accelerating rebound of a pole piece and pole piece processing equipment. The device for accelerating rebound of the pole piece comprises a vibration mechanism and a plurality of transmission rollers. And the plurality of transmission rollers are used for transmitting pole pieces. And the vibration mechanism is arranged between two adjacent transmission rollers along the transmission direction of the pole piece, and is used for vibrating the pole piece. The vibration mechanism is located between the two adjacent conveying rollers and can vibrate the part, located between the two adjacent conveying rollers, of the pole piece, and the pole piece is conveyed along with the conveying rollers so that vibration of the pole piece can be achieved. The pole piece is vibrated through the vibration mechanism, internal stress release of the pole piece can be accelerated under the vibration effect of the vibration mechanism, rebounding of the pole piece is accelerated, and therefore the production efficiency of the pole piece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pole piece processing, and in particular to a device for accelerating pole piece rebound and pole piece processing equipment. Background Art

[0002] During the production and processing of the pole pieces of the battery cells, the pole pieces need to be rolled to a certain density, which helps to improve the energy density of the battery cells. The pole pieces after rolling will rebound appropriately due to the release of internal stress. The pole pieces that have not released stress are assembled inside the battery cells, which easily leads to lithium deposition and wrinkling of the pole pieces inside the battery cells. Therefore, the pole pieces need to be processed in the next step after the stress of the pole pieces is released. The stress release of the pole pieces is slow, and the time for the pole pieces to rebound affects the production efficiency of the pole pieces. Therefore, how to accelerate the stress release of the pole pieces is an urgent problem to be solved in battery technology. Utility Model Content

[0003] The embodiments of the present application provide a device for accelerating the rebound of a pole piece and a pole piece processing device to improve the production efficiency of the pole piece.

[0004] In a first aspect, an embodiment of the present application provides a device for accelerating the rebound of a pole piece, comprising a vibration mechanism and a plurality of transmission rollers; the plurality of transmission rollers are used to transmit the pole piece; the vibration mechanism is arranged between two adjacent transmission rollers along the transmission direction of the pole piece, and the vibration mechanism is used to vibrate the pole piece.

[0005] In the above technical solution, the vibration mechanism is located between two adjacent transmission rollers, and the vibration mechanism can vibrate the portion of the pole piece located between the two adjacent transmission rollers, and the pole piece is transmitted along with the transmission rollers to achieve the vibration of the pole piece. By vibrating the pole piece through the vibration mechanism, the internal stress release of the pole piece can be accelerated under the vibration of the vibration mechanism to accelerate the rebound of the pole piece, thereby improving the production efficiency of the pole piece.

[0006] In some embodiments, the vibration mechanism includes a vibration roller, which is used to vibrate the pole piece. By vibrating the pole piece with the vibration roller, the vibration roller can achieve vibration and transmission of the pole piece, which can not only accelerate the rebound of the pole piece and improve the production efficiency of the pole piece, but also reduce the friction between the pole piece and the vibration roller, reducing the risk of damage to the pole piece.

[0007] In some embodiments, there are multiple vibration rollers, which are arranged along the transmission direction of the pole piece. The multiple vibration rollers can vibrate the pole piece, accelerate the rebound of the pole piece, improve the stress release effect of the pole piece, and further improve the production efficiency of the pole piece.

[0008] In some embodiments, the vibration mechanism includes a transmission belt, which is sleeved on a plurality of vibration rollers, and the transmission belt is used to contact and transmit the pole piece. By sleeved on the plurality of vibration rollers, the pole piece can be transmitted on the transmission belt, and the vibration roller can transmit the vibration to the pole piece through the transmission belt to achieve vibration of the pole piece, and the transmission belt can support the pole piece to reduce the risk of wrinkling the pole piece.

[0009] In some embodiments, the device for accelerating the rebound of the pole piece further includes an adsorption component, which is used to adsorb the pole piece to the conveyor belt. The pole piece is adsorbed to the conveyor belt by the adsorption component, so that the contact between the pole piece and the conveyor belt is closer, and the vibration effect of the vibration roller on the pole piece is improved.

[0010] In some embodiments, the adsorption assembly includes an adsorption head and an air extraction device, the air extraction device is connected to the adsorption head, and the adsorption head is arranged between two adjacent vibration rollers along the transmission direction of the pole piece. The gas at the adsorption head is extracted by the air extraction device, and the adsorption head is arranged between two adjacent vibration rollers. The adsorption head can adsorb the pole piece to attach the pole piece to the conveyor belt to enhance the vibration effect of the vibration roller on the pole piece.

[0011] In some embodiments, the conveyor belt is a breathable material, and the conveyor belt is at least partially located between the pole piece and the adsorption head to separate the pole piece and the adsorption head. The breathable material of the conveyor belt allows the gas between the pole piece and the conveyor belt to pass through the conveyor belt, which is conducive to the pole piece being attached to the conveyor belt and improving the contact effect between the conveyor belt and the pole piece.

[0012] In some embodiments, the suction head is adjustable along the axial direction of the vibration roller. The suction head can be adjusted along the axial direction of the vibration roller to suction different positions of the conveyor belt and adjust the fitting effect between the pole piece and the conveyor belt.

[0013] In some embodiments, the device for accelerating the rebound of the pole piece further includes a vibration generator, which is connected to the vibration roller and configured to drive the vibration roller to vibrate. The vibration roller is vibrated by using the vibration generator as a power source to achieve the vibration of the vibration roller, so that the vibration of the vibration roller is more stable.

[0014] In some embodiments, there are multiple vibration rollers, which are arranged along the transmission direction of the pole piece, and each vibration roller is correspondingly provided with a vibration generator. By providing a vibration generator for each vibration roller, each vibration generator can vibrate a vibration roller separately, so as to adjust the vibration of the vibration roller and improve the vibration effect of the pole piece.

[0015] In some embodiments, the device for accelerating the rebound of the pole piece further includes a fixed frame and a movable frame, the vibration roller is rotatably arranged on the movable frame around its own axis, and the movable frame is swingably arranged on the fixed frame, and when the vibration generator drives the vibration roller to vibrate, the movable frame can swing relative to the fixed frame. By setting the movable frame to be able to swing relative to the fixed frame, when the vibration generator vibrates the vibration roller, the movement of the movable frame can slow down the vibration transmitted from the vibration generator to the vibration roller, and then slow down the vibration transmitted to the pole piece, thereby reducing the risk of damage to the pole piece due to excessive vibration intensity.

[0016] In some embodiments, the device for accelerating the rebound of the pole piece further includes a detection unit and a correction mechanism, which are arranged downstream of the vibration mechanism along the transmission direction of the pole piece; the detection unit is used to detect the position of the pole piece along the width direction of the pole piece, and the correction mechanism responds to the detection unit to correct the pole piece. By providing the detection unit and the correction mechanism, the correction mechanism can correct the pole piece, reducing the risk of the pole piece detaching from the transmission roller due to vibration.

[0017] In some embodiments, the deflection correction mechanism includes a deflection correction roller, which is used to correct the deflection of the pole piece. The deflection correction roller can correct the deflection of the pole piece and can also transfer the pole piece, reducing the risk of scratching the pole piece during deflection correction.

[0018] In some embodiments, the plurality of transmission rollers include a first transmission roller and a second transmission roller, along the transmission direction, the vibration mechanism is arranged between the first transmission roller and the second transmission roller, the second transmission roller is located between the first transmission roller and the deflection correction roller, along the thickness direction of the pole piece, the second transmission roller is located on one side of the pole piece, and the first transmission roller and the deflection correction roller are located on the other side of the pole piece. By arranging the second transmission roller and the first transmission roller and the deflection correction roller on both sides of the pole piece, and the second transmission roller is located between the first transmission roller and the deflection correction roller, the pole piece can be tensioned, which is conducive to the contact between the pole piece and the deflection correction roller, and the deflection correction effect of the pole piece is improved.

[0019] In some embodiments, along the transmission direction of the pole piece, the detection unit is located between the second transmission roller and the correction roller. The detection unit first detects the degree of deviation of the pole piece, and then corrects the correction roller, which can make the correction of the pole piece more efficient and improve the correction effect.

[0020] In the second aspect, an embodiment of the present application provides a pole piece processing equipment, comprising a rolling device, a winding device and a device for accelerating the rebound of the pole piece provided by any embodiment of the first aspect; along the transmission direction of the pole piece, the rolling device is located upstream of the device for accelerating the rebound of the pole piece, and the rolling device is used to roll the pole piece; along the transmission direction of the pole piece, the winding device is located downstream of the device for accelerating the rebound of the pole piece, and the winding device is used to collect the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a pole piece processing device provided in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of the structure of a device for accelerating the rebound of a pole piece provided in some embodiments of the present application;

[0024] Figure 3 A schematic diagram of the structure of a vibration mechanism provided in some embodiments of the present application;

[0025] Figure 4 A schematic diagram of the structure of a vibration mechanism and an adsorption assembly provided in some embodiments of the present application;

[0026] Figure 5 A schematic diagram of the structure of an adsorption assembly provided in some embodiments of the present application;

[0027] Figure 6 A schematic structural diagram of a vibration generator and a connecting part provided in some embodiments of the present application.

[0028] Icons: 100-pole piece processing equipment; 10-device for accelerating the rebound of the pole piece; 1-vibration mechanism; 11-vibration roller; 12-transmission belt; 2-transmission roller; 21-first transmission roller; 22-second transmission roller; 3-adsorption assembly; 31-adsorption head; 32-exhaust device; 33-main pipeline; 34-branch pipe; 4-vibration generator; 41-connecting part; 411-sleeve ring; 5-fixed frame; 6-movable frame; 61-connecting shaft; 62-swing rod; 7-detection unit; 71-light source receiver; 72-light source transmitter; 8-correction mechanism; 81-correction roller; 20-rolling device; 30-winding device; 200-pole piece. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0031] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0035] The term "plurality" used in the present application refers to two or more (including two).

[0036] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0037] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0038] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0039] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0040] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0041] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0042] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and its modified compounds, etc.

[0043] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, or a foamed alloy. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0044] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0045] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, etc. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0046] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0047] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0048] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0049] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0050] During the production process of battery cells, the pole pieces can be rolled to a certain density to increase the energy density of the battery cells. The rolled pole pieces will rebound appropriately due to the release of internal stress. If the pole pieces that have not released stress are assembled inside the battery cells, it is easy to cause lithium deposition and wrinkling of the pole pieces inside the battery cells. Therefore, it is necessary to release the internal stress of the pole pieces so that the pole pieces can rebound before the next processing of the pole pieces.

[0051] In order to release the stress of the pole piece, the rolled pole piece can be exposed to the environment to release the stress of the pole piece. However, the exposed pole piece material is easy to oxidize and the stress is released slowly, and the pole piece has a long rebound time, which affects the production efficiency of the pole piece.

[0052] In view of this, in order to improve the production efficiency of the pole piece, the embodiment of the present application provides a device for accelerating the rebound of the pole piece. In the process of transmitting the pole piece by the transmission roller, the pole piece is vibrated by a vibration mechanism to accelerate the stress release of the pole piece, promote the rebound of the pole piece, and thus improve the production efficiency of the pole piece.

[0053] The device for accelerating the rebound of a pole piece disclosed in the embodiment of the present application is applicable to a pole piece processing device. The pole piece produced by the pole piece processing device can be used to produce batteries.

[0054] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the pole piece processing equipment 100 provided in some embodiments of the present application. The embodiment of the present application provides a pole piece processing equipment 100, including a rolling device 20, a winding device 30 and a device 10 for accelerating the rebound of the pole piece.

[0055] The rolling device 20 is used to roll the pole piece 200. For example, the pole piece 200 can be rolled by a cold pressing process. The winding device 30 is used to collect the pole piece 200. Along the transmission direction of the pole piece 200, the rolling mechanism is located upstream of the device for accelerating the rebound of the pole piece 200. The winding device 30 is located downstream of the device 10 for accelerating the rebound of the pole piece.

[0056] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a device 10 for accelerating the rebound of a pole piece provided in some embodiments of the present application. The present application embodiment provides a device 10 for accelerating the rebound of a pole piece, comprising a vibration mechanism 1 and a plurality of transmission rollers 2. The plurality of transmission rollers 2 are used to transmit the pole piece 200. The vibration mechanism 1 is arranged between two adjacent transmission rollers 2 along the transmission direction of the pole piece 200, and the vibration mechanism 1 is used to vibrate the pole piece 200.

[0057] The transmission roller 2 is used to transmit the pole piece 200. A plurality of transmission rollers 2 are arranged along the transmission direction of the pole piece 200. When transmitting the pole piece 200, a plurality of transmission rollers 2 may be located on the same side of the pole piece 200 along the thickness direction of the pole piece 200; or part of the transmission rollers 2 may be located on one side of the pole piece 200 along the thickness direction of the pole piece 200, and another part of the transmission rollers 2 may be located on the other side of the pole piece 200 along the transmission direction of the pole piece 200. At least one transmission roller 2 may be an active roller, that is, the transmission roller 2 is connected to a driving mechanism (not shown in the figure), and the driving mechanism may be a driving structure with a motor as a driving source. Alternatively, all transmission rollers 2 may be driven rollers, and the driven rollers rotate during the transmission of the pole piece 200; for example, in the process of the winding device 30 collecting the pole piece 200, the pole piece 200 is transmitted to the winding device 30, and the transmission rollers 2 rotate following the transmission of the pole piece 200.

[0058] The vibration mechanism 1 is used to vibrate the pole piece 200. The vibration mechanism 1 may be in direct contact with the pole piece 200 to vibrate the pole piece 200.

[0059] The vibration mechanism 1 is arranged between two adjacent transmission rollers 2 along the transmission direction of the pole piece 200, that is, transmission rollers 2 are arranged on both sides of the vibration mechanism 1 along the transmission direction of the pole piece 200. In the embodiment where there is one vibration mechanism 1, when there are more than three transmission rollers 2, the vibration mechanism 1 may be arranged between two adjacent transmission rollers 2 in some cases, and no vibration mechanism 1 may be arranged between two adjacent transmission rollers 2 in another case. For example, there are three vibration rollers 11, and the three vibration rollers 11 are respectively the first roller, the second roller, and the third roller. The vibration mechanism 1 may be arranged between the first roller and the second roller, and no vibration mechanism 1 may be arranged between the second roller and the third roller; or the vibration mechanism 1 may not be arranged between the first roller and the second roller, and the vibration mechanism 1 may be arranged between the second roller and the third roller. In the embodiment where there are multiple vibration mechanisms 1, each vibration mechanism 1 may be arranged between two different adjacent transmission rollers 2; or multiple vibration mechanisms 1 may be located between the same two adjacent transmission rollers 2.

[0060] In the embodiment of the present application, the vibration mechanism 1 is located between two adjacent transmission rollers 2, and the vibration mechanism 1 can vibrate the portion of the pole piece 200 located between the two adjacent transmission rollers 2, and the pole piece 200 is transmitted along with the transmission rollers 2 to achieve vibration of the pole piece 200. By vibrating the pole piece 200 by the vibration mechanism 1, the internal stress release of the pole piece 200 can be accelerated under the vibration of the vibration mechanism 1, so as to accelerate the rebound of the pole piece 200, thereby improving the production efficiency of the pole piece 200.

[0061] In some embodiments, please refer to Figure 2 The vibration mechanism 1 includes a vibration roller 11 , and the vibration roller 11 is used to vibrate the pole piece 200 .

[0062] The vibration roller 11 may transmit the vibration to the pole piece 200 by vibrating itself, so as to realize the vibration of the pole piece 200; for example, a mounting cavity is provided in the vibration roller 11, a vibrator is provided in the mounting cavity, and the vibrator vibrates in the mounting cavity to realize the vibration of the vibration roller 11. Alternatively, the vibration roller 11 may be connected to a vibration component, and the vibration component vibrates the vibration roller 11, so that the vibration roller 11 vibrates the pole piece 200. The vibration roller 11 may be used only to vibrate the pole piece 200; the vibration roller 11 may also be used to transmit the pole piece 200.

[0063] There can be one or more vibration rollers 11. When there is one vibration roller 11, one vibration roller 11 vibrates the pole piece 200. When there are more than one vibration rollers 11, the multiple vibration rollers 11 can be arranged along the transmission direction of the pole piece 200, and two adjacent vibration rollers 11 can be abutted, or two adjacent vibration rollers 11 can be arranged at intervals. The amplitudes and frequencies of the vibrations of the pole piece 200 by the multiple vibration rollers 11 can be the same or different.

[0064] By vibrating the pole piece 200 through the vibration roller 11, the vibration roller 11 can realize the vibration of the pole piece 200, which can not only accelerate the rebound of the pole piece 200 and improve the production efficiency of the pole piece 200, but also reduce the friction between the pole piece 200 and the vibration roller 11, reducing the risk of damage to the pole piece 200.

[0065] In some embodiments, please refer to Figure 2 There are multiple vibration rollers 11 , and the multiple vibration rollers 11 are arranged along the transmission direction of the pole piece 200 .

[0066] As an example, Figure 2 As shown, there are three vibration rollers 11 , and the three vibration rollers 11 are arranged at intervals along the transmission direction of the pole piece 200 . The three vibration rollers 11 can both transmit the pole piece 200 and vibrate the pole piece 200 .

[0067] In the above embodiment, the plurality of vibration rollers 11 can vibrate the pole piece 200 , accelerate the rebound of the pole piece 200 , improve the stress release effect of the pole piece 200 , and further improve the production efficiency of the pole piece 200 .

[0068] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 3 The structure diagram of the vibration mechanism 1 provided in some embodiments of the present application is as follows. The vibration mechanism 1 comprises a transmission belt 12, which is sleeved on a plurality of vibration rollers 11, and the transmission belt 12 is used to contact with the pole piece 200 and transmit the pole piece 200.

[0069] The transmission belt 12 may be an annular belt structure, and the transmission belt 12 is sleeved on a plurality of vibration rollers 11. Along the transmission direction of the pole piece 200, the vibration rollers 11 at both ends of the transmission belt 12 may tension the transmission belt 12, so that the transmission belt 12 can transmit the pole piece 200. The transmission belt 12 may be sleeved on all the vibration rollers 11; or the transmission belt 12 may be sleeved on some of the vibration rollers 11, and the other vibration rollers 11 are located outside the transmission belt 12. When the pole piece 200 passes through the vibration mechanism 1, only the transmission belt 12 may contact the pole piece 200, or a part of the pole piece 200 may contact the transmission belt 12, and the other part of the pole piece 200 may contact the vibration rollers 11, so as to vibrate the pole piece 200.

[0070] By sleeved the conveyor belt 12 on a plurality of vibration rollers 11, the pole piece 200 can be transmitted on the conveyor belt 12. The vibration rollers 11 can transmit the vibration to the pole piece 200 through the conveyor belt 12 to realize the vibration of the pole piece 200. The conveyor belt 12 can support the pole piece 200 and reduce the risk of wrinkling of the pole piece 200.

[0071] In some embodiments, please refer to Figure 4 and Figure 5 , Figure 4A schematic diagram of the structure of a vibration mechanism 1 and an adsorption assembly 3 provided in some embodiments of the present application; Figure 5 The structure diagram of the adsorption assembly 3 provided in some embodiments of the present application. The device 10 for accelerating the rebound of the pole piece further comprises an adsorption assembly 3, which is used to adsorb the pole piece 200 to the conveyor belt 12.

[0072] The adsorption component 3 may be located above the conveyor belt 12, and the adsorption component 3 absorbs the gas between the conveyor belt 12 and the pole piece 200 to cause the pole piece 200 to stick to the conveyor belt 12; or the conveyor belt 12 may be sleeved on the adsorption component 3, and the adsorption component 3 absorbs the gas in the inner ring of the conveyor belt 12 to create a pressure difference between the air pressure between the pole piece 200 and the conveyor belt 12 and the air pressure in the inner ring of the conveyor belt 12, thereby causing the pole piece 200 to stick to the conveyor belt 12.

[0073] The pole piece 200 is adsorbed onto the conveyor belt 12 by the adsorption assembly 3 , so that the contact between the pole piece 200 and the conveyor belt 12 is closer, thereby enhancing the vibration effect of the vibration roller 11 on the pole piece 200 .

[0074] In some embodiments, please refer to Figure 5 The adsorption assembly 3 includes an adsorption head 31 and an air extraction device 32 . The air extraction device 32 is connected to the adsorption head 31 . Along the transmission direction of the pole piece 200 , the adsorption head 31 is disposed between two adjacent vibration rollers 11 .

[0075] The adsorption head 31 may be fixedly arranged between two adjacent vibration rollers 11 along the transmission direction of the pole piece 200. The adsorption head 31 may also be adjustable between two adjacent vibration rollers 11, wherein the adsorption head 31 may be adjustable along the transmission direction of the pole piece 200 or along the axial direction of the vibration roller 11.

[0076] The conveyor belt 12 may be made of a sealing material, and the adsorption head 31 may absorb the gas between the electrode piece 200 and the conveyor belt 12 from both sides in the width direction of the electrode piece 200 to achieve the adhesion of the electrode piece 200 to the conveyor belt 12; the conveyor belt 12 may be made of a breathable material, and the adsorption head 31 may absorb the gas that penetrates the conveyor belt 12, or directly absorb the gas between the electrode piece 200 and the conveyor belt 12.

[0077] There may be one or more adsorption heads 31. When there are more than one adsorption head 31, one suction device 32 may be provided for each adsorption head 31, or multiple adsorption heads 31 may share one suction device 32. An air suction channel is provided in the adsorption head 31, and the air suction channel is connected to the suction device 32. An air suction hole is provided on the side of the adsorption head 31 facing the electrode 200, and the air suction hole is connected to the air suction channel.

[0078] As an example, Figure 5As shown, the adsorption assembly 3 also includes a main pipeline 33 and multiple branch pipes 34, the multiple branch pipes 34 are all connected to the main pipeline 33, the exhaust device 32 is connected to the main pipeline 33, each branch pipe 34 is correspondingly connected to an adsorption head 31, and the exhaust device 32 exhausts air outward, so that the gas at the adsorption head 31 enters the main pipeline 33 through the branch pipe 34, and then is discharged from the exhaust device 32. Among them, the exhaust device 32 can be a driving structure with a motor as a power source. Among them, the main pipeline 33 and the branch pipes can be steel pipes, plastic pipes, etc.

[0079] The gas at the adsorption head 31 is extracted by the vacuum device 32, and the adsorption head 31 is set between two adjacent vibration rollers 11. The adsorption head 31 can adsorb the pole piece 200 to attach the pole piece 200 to the conveyor belt 12 to enhance the vibration effect of the vibration roller 11 on the pole piece 200.

[0080] In some embodiments, the conveyor belt 12 is made of a breathable material, and the conveyor belt 12 is at least partially located between the pole piece 200 and the adsorption head 31 to separate the pole piece 200 and the adsorption head 31 .

[0081] It is possible that the entire conveyor belt 12 is located between the pole piece 200 and the adsorption head 31 along the thickness direction of the pole piece 200; it is also possible that a portion of the conveyor belt 12 is located between the pole piece 200 and the adsorption head 31 along the thickness direction of the pole piece 200, and another portion is exposed from the pole piece 200; it is also possible that a portion of the conveyor belt 12 is located between the pole piece 200 and the adsorption head 31 along the thickness direction of the pole piece 200, and another portion overlaps with the pole piece 200 and is exposed from the adsorption head 31.

[0082] As an example, Figure 5 As shown, the branch pipe 34 extends into the inner ring of the conveyor belt 12 and is connected to the adsorption head 31 . The entire adsorption head 31 is located in the inner ring of the conveyor belt 12 .

[0083] In the above embodiment, the breathable material of the conveyor belt 12 allows the gas between the electrode 200 and the conveyor belt 12 to pass through the conveyor belt 12, which is beneficial for the electrode 200 to adhere to the conveyor belt 12 and improves the contact effect between the conveyor belt 12 and the electrode 200.

[0084] In some embodiments, the axial position of the adsorption head 31 along the vibration roller 11 is adjustable.

[0085] The device 10 for accelerating the rebound of the electrode piece further includes a fixing frame 5, on which a telescopic structure is provided, which can be telescopic along the axial direction of the vibration roller 11, and the adsorption head 31 is provided at the telescopic end of the telescopic structure to achieve that the axial position of the adsorption head 31 along the vibration roller 11 is adjustable, and when the adsorption head 31 moves, at least part of the branch pipe 34 moves with the adsorption head 31. The branch pipe 34 may be a corrugated pipe.

[0086] In the above embodiment, the adsorption head 31 can adjust its position along the axial direction of the vibration roller 11 to adsorb different positions of the conveyor belt 12 and adjust the fitting effect between the pole piece 200 and the conveyor belt 12 .

[0087] In some embodiments, please refer to Figure 3-Figure 6 . Figure 6 The structure diagram of the vibration generator 4 and the connection part 41 provided in some embodiments of the present application. The device 10 for accelerating the rebound of the pole piece also includes the vibration generator 4, which is connected to the vibration roller 11 and is configured to drive the vibration roller 11 to vibrate.

[0088] The vibration generator 4 may be directly connected to the vibration roller 11 or indirectly connected to the vibration roller 11. One vibration generator 4 may be connected to one vibration roller 11 or one vibration generator 4 may be connected to multiple vibration rollers 11.

[0089] The vibration generator 4 can be an electromagnetic vibration generator 4, a cam eccentric vibration generator 4, etc. For example, the vibration generator 4 is an electromagnetic vibration generator 4, and the electromagnetic vibration generator 4 includes a pulse generator, an electromagnetic coil, an elastic member and a vibration part. The elastic member is connected to the vibration part, and the pulse generator can generate a pulse current to control the electromagnetic coil to cyclically power on or off. When the electromagnetic coil is energized, the electromagnetic coil magnetically attracts the vibration part, and the elastic member is compressed; when the electromagnetic coil is de-energized, the elastic member rebounds the vibration part; in this way, the vibration of the vibration part is realized reciprocatingly. It can be understood that the vibration part is the power output end of the vibration generator 4, and the vibration roller 11 can be vibrated by the vibration part to realize the vibration of the pole piece 200 of the vibration roller 11.

[0090] The vibration roller 11 is vibrated by using the vibration generator 4 as a power source to achieve the vibration of the vibration roller 11, so that the vibration of the vibration roller 11 is more stable.

[0091] In some embodiments, there are multiple vibration rollers 11 , which are arranged along the transmission direction of the pole piece 200 , and each vibration roller 11 is correspondingly provided with a vibration generator 4 .

[0092] As an example, Figure 4 As shown, there are three vibration rollers 11 and three vibration generators 4 , and the vibration rollers 11 correspond to the vibration generators 4 one by one.

[0093] By providing a vibration generator 4 for each vibration roller 11 , each vibration generator 4 can vibrate a vibration roller 11 independently, so as to adjust the vibration of the vibration roller 11 and enhance the vibration effect of the pole piece 200 .

[0094] In some embodiments, the device 10 for accelerating the rebound of the electrode also includes a fixed frame 5 and a movable frame 6, the vibration roller 11 is rotatably arranged on the movable frame 6 around its own axis, and the movable frame 6 is swingably arranged on the fixed frame 5. When the vibration generator 4 drives the vibration roller 11 to vibrate, the movable frame 6 can swing relative to the fixed frame 5.

[0095] As an example, Figure 4 As shown, there are three vibration rollers 11 and three movable frames 6, and one vibration roller 11 is correspondingly arranged for one movable frame 6. The vibration roller 11 has a roller body and two mounting shafts. Along the axial direction of the roller body, the two mounting shafts are located on both sides of the roller body. The roller body is rotatably arranged on the movable frame 6 around the axial direction of the roller body through the two mounting shafts, and the movable frame 6 is swingably arranged on the fixed frame 5. The vibration generator 4 has a connecting portion 41, and the connecting portion 41 connects the vibration roller 11 and the output end of the vibration generator 4. Among them, one end of the connecting portion 41 is hinged to the power output end of the vibration generator 4, and the other end has a sleeve ring 411, and the sleeve ring 411 is sleeved on the mounting shaft. Among them, the movable frame 6 includes a connecting shaft 61 and a swing rod 62, and the connecting shaft 61 is rotatably arranged on the fixed frame 5. One end of the swing rod 62 is pivotally connected to the connecting shaft 61, and the other end is used to install the vibration roller 11. The positions of the vibration generator 4 and the fixed frame 5 are relatively fixed, and the swing rod 62 and the connecting portion 41 are arranged at an acute angle.

[0096] The movable frame 6 is arranged to be able to swing relative to the fixed frame 5, so that when the vibration generator 4 vibrates the vibration roller 11, the movement of the movable frame 6 can slow down the vibration transmitted to the vibration roller 11 by the vibration generator 4, and then slow down the vibration transmitted to the pole piece 200, thereby reducing the risk of damage to the pole piece 200 due to excessive vibration intensity.

[0097] In some embodiments, the device 10 for accelerating the rebound of the pole piece further includes a detection unit 7 and a correction mechanism 8, and the detection unit 7 and the correction mechanism 8 are arranged downstream of the vibration mechanism 1 along the transmission direction of the pole piece 200. The detection unit 7 is used to detect the position of the pole piece 200 along the width direction of the pole piece 200, and the correction mechanism 8 responds to the detection unit 7 to correct the pole piece 200.

[0098] The deflection correction mechanism 8 may guide the transmission of the pole piece 200 to correct the deflection of the pole piece 200 , or the deflection correction mechanism 8 may move the position of the pole piece 200 along the width direction of the pole piece 200 to correct the deflection of the pole piece 200 .

[0099] The detection unit 7 can be photoelectric sensor detection, ultrasonic sensor detection, etc.

[0100] By providing the detection unit 7 and the deviation correction mechanism 8, the deviation correction mechanism 8 can correct the deviation of the pole piece 200, thereby reducing the risk of the pole piece 200 being separated from the transmission roller 2 due to vibration.

[0101] In some embodiments, the deflection correction mechanism 8 includes a deflection correction roller 81 , and the deflection correction roller 81 is used to correct the pole piece 200 .

[0102] The deflection correction mechanism 8 may further include a driving component (not shown in the figure), which is used to drive the deflection correction roller 81 to move axially along the deflection correction roller 81 to drive the pole piece 200 to move axially along the deflection correction roller 81 .

[0103] As an example, please refer to Figure 2 , the detection unit 7 includes a light source transmitter 72 and a light source receiver 71, and the light source receiver 71 is used to receive the light source emitted by the light source transmitter 72. The light source transmitter 72 and the light source receiver 71 are arranged on both sides of the pole piece 200 along the thickness direction of the pole piece 200, and the pole piece 200 has an edge portion along the width direction of the pole piece 200. When the position of the pole piece 200 is normal, the light source transmitter 72, the edge portion of the pole piece 200 and the light source receiver 71 are arranged along the thickness direction of the pole piece 200, and the light source receiver 71 cannot receive the light source emitted by the light source transmitter 72; when the position of the pole piece 200 is offset, the edge portion of the pole piece 200 offsets the light source transmitter 72 and the light source receiver 71 along the thickness direction of the pole piece 200, and the light source receiver 71 can receive the light source emitted by the light source transmitter 72.

[0104] The pole piece 200 is corrected by the correction roller 81 . The correction roller 81 can not only correct the pole piece 200 , but also transport the pole piece 200 , thereby reducing the risk of scratching the pole piece 200 during correction.

[0105] In some embodiments, the plurality of transmission rollers 2 include a first transmission roller 21 and a second transmission roller 22. Along the transmission direction, the vibration mechanism 1 is disposed between the first transmission roller 21 and the second transmission roller 22. The second transmission roller 22 is located between the first transmission roller 21 and the deflection correction roller 81. Along the thickness direction of the pole piece 200, the second transmission roller 22 is located on one side of the pole piece 200, and the first transmission roller 21 and the deflection correction roller 81 are located on the other side of the pole piece 200.

[0106] By arranging the second transmission roller 22 as well as the first transmission roller 21 and the deflection correction roller 81 on both sides of the pole piece 200, and the second transmission roller 22 is located between the first transmission roller 21 and the deflection correction roller 81, the pole piece 200 can be tensioned, which is beneficial for the contact between the pole piece 200 and the deflection correction roller 81 and improves the deflection correction effect of the pole piece 200.

[0107] In some embodiments, the deviation-correcting roller 81 may be a transport roller 2 .

[0108] In some embodiments, along the transport direction of the pole piece 200 , the detection unit 7 is located between the second transport roller 22 and the deviation correction roller 81 .

[0109] By first detecting the deviation degree of the pole piece 200 through the detection unit 7 and then correcting the deviation of the correction roller 81, the correction of the pole piece 200 can be made more efficient and the correction effect can be improved.

[0110] The embodiment of the present application provides a pole piece processing device 100, comprising a rolling device 20, a winding device 30, and a device 10 for accelerating the rebound of the pole piece provided in any of the above embodiments. Along the transmission direction of the pole piece 200, the rolling device 20 is located upstream of the device 10 for accelerating the rebound of the pole piece, and the rolling device 20 is used to roll the pole piece 200. Along the transmission direction of the pole piece 200, the winding device 30 is located downstream of the device 10 for accelerating the rebound of the pole piece, and the winding device 30 is used to collect the pole piece 200.

[0111] Please refer to Figure 2-Figure 6 An embodiment of the present application provides a device 10 for accelerating the rebound of a pole piece, the device comprising a vibration mechanism 1 and a plurality of transmission rollers 2, the vibration mechanism 1 comprising a transmission belt 12, an adsorption component 3, a vibration generator 4 and a plurality of vibration rollers 11, the transmission belt 12 is sleeved on the plurality of vibration rollers 11, the adsorption component 3 is used to adsorb the pole piece 200 on the transmission belt 12, the vibration generator 4 is used to vibrate the vibration rollers 11, and the vibration rollers 11 transmit vibration to the pole piece 200 through the transmission belt 12 to vibrate the pole piece 200.

[0112] The vibration mechanism 1 is located between two adjacent transmission rollers 2. The vibration mechanism 1 can vibrate the portion of the pole piece 200 located between the two adjacent transmission rollers 2, and the pole piece 200 is transmitted along with the transmission roller 2 to achieve vibration of the pole piece 200. The pole piece 200 is adsorbed to the transmission belt 12 by the adsorption component 3, so that the contact between the pole piece 200 and the transmission belt 12 is closer, and the vibration effect of the vibration roller 11 on the pole piece 200 is improved. By vibrating the pole piece 200 by the vibration mechanism 1, the internal stress release of the pole piece 200 can be accelerated under the vibration of the vibration mechanism 1, so as to accelerate the rebound of the pole piece 200, thereby improving the production efficiency of the pole piece 200.

[0113] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0114] The above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for accelerating the rebound of a pole piece, characterized in that: include: A plurality of conveying rollers for conveying the pole pieces; A vibration mechanism is arranged between two adjacent transmission rollers along the transmission direction of the pole piece, and the vibration mechanism is used to vibrate the pole piece.

2. The device for accelerating the rebound of a pole piece according to claim 1, characterized in that: The vibration mechanism includes a vibration roller, and the vibration roller is used to vibrate the pole piece.

3. The device for accelerating the rebound of a pole piece as claimed in claim 2, characterized in that: There are multiple vibration rollers, and the multiple vibration rollers are arranged along the transmission direction of the pole piece.

4. The device for accelerating the rebound of a pole piece as claimed in claim 3, characterized in that: The vibration mechanism comprises a transmission belt, which is sleeved on a plurality of the vibration rollers and is used for contacting with the pole piece and transmitting the pole piece.

5. The device for accelerating the rebound of a pole piece as claimed in claim 4, characterized in that: The device for accelerating the rebound of the pole piece also includes an adsorption component, and the adsorption component is used to adsorb the pole piece to the conveyor belt.

6. The device for accelerating the rebound of a pole piece as claimed in claim 5, characterized in that: The adsorption assembly includes an adsorption head and an air extraction device, the air extraction device is connected to the adsorption head, and along the transmission direction of the pole piece, the adsorption head is arranged between two adjacent vibration rollers.

7. The device for accelerating the rebound of a pole piece as claimed in claim 6, characterized in that: The conveyor belt is made of a breathable material, and at least a portion of the conveyor belt is located between the pole piece and the adsorption head to separate the pole piece and the adsorption head.

8. The device for accelerating the rebound of a pole piece as claimed in claim 6, characterized in that: The axial position of the adsorption head along the vibration roller is adjustable.

9. The device for accelerating the rebound of a pole piece as claimed in claim 2, characterized in that: The device for accelerating the rebound of the pole piece also includes a vibration generator, which is connected to the vibration roller and is configured to drive the vibration roller to vibrate.

10. The device for accelerating the rebound of a pole piece according to claim 9, characterized in that: There are multiple vibration rollers, which are arranged along the transmission direction of the pole piece, and each vibration roller is correspondingly provided with one vibration generator.

11. The device for accelerating the rebound of a pole piece according to claim 9, characterized in that: The device for accelerating the rebound of the electrode also includes a fixed frame and a movable frame. The vibration roller is rotatably arranged on the movable frame around its own axis, and the movable frame is swingably arranged on the fixed frame. When the vibration generator drives the vibration roller to vibrate, the movable frame can swing relative to the fixed frame.

12. The device for accelerating the rebound of a pole piece according to any one of claims 1 to 11, characterized in that: The device for accelerating the rebound of the pole piece further comprises a detection unit and a deviation correction mechanism, and along the transmission direction of the pole piece, the detection unit and the deviation correction mechanism are arranged downstream of the vibration mechanism; The detection unit is used to detect the position of the pole piece along the width direction of the pole piece, and the correction mechanism responds to the detection unit to correct the pole piece.

13. The device for accelerating the rebound of a pole piece according to claim 12, characterized in that: The deflection correction mechanism comprises a deflection correction roller, and the deflection correction roller is used for correcting the deflection of the pole piece.

14. The device for accelerating the rebound of a pole piece as claimed in claim 13, characterized in that: The multiple transmission rollers include a first transmission roller and a second transmission roller. Along the transmission direction, the vibration mechanism is arranged between the first transmission roller and the second transmission roller, and the second transmission roller is located between the first transmission roller and the deflection correction roller. Along the thickness direction of the pole piece, the second transmission roller is located on one side of the pole piece, and the first transmission roller and the deflection correction roller are located on the other side of the pole piece.

15. The device for accelerating the rebound of a pole piece according to claim 14, characterized in that: Along the transmission direction of the pole piece, the detection unit is located between the second transmission roller and the deviation correction roller.

16. A pole piece processing device, characterized in that: include: The device for accelerating the rebound of a pole piece as claimed in any one of claims 1 to 15; A rolling device, located upstream of the device for accelerating the rebound of the pole piece along the transmission direction of the pole piece, and used for rolling the pole piece; A winding device is located downstream of the device for accelerating the rebound of the pole piece along the transmission direction of the pole piece, and is used to collect the pole piece.

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