Device for accelerating rebound of electrode sheet, and electrode sheet processing apparatus

Abstract

A device (10) for accelerating rebound of an electrode sheet, comprising a vibration mechanism (1) and a plurality of conveying rollers (2), wherein the plurality of conveying rollers (2) are used for conveying an electrode sheet (200); and the vibration mechanism (1) is arranged between two adjacent conveying rollers (2) in the conveying direction of the electrode sheet (200), the vibration mechanism (1) is used for vibrating the electrode sheet (200), and the vibration mechanism (1) can vibrate the portion of the electrode sheet (200) located between the two adjacent conveying rollers (2), such that as the conveying rollers (2) convey the electrode sheet (200), vibration of the electrode sheet (200) is realized. The device (10) for accelerating rebound of an electrode sheet can accelerate the release of internal stress of the electrode sheet (200) under the vibration action of the vibration mechanism (1), so as to accelerate the rebound of the electrode sheet (200), thereby improving the production efficiency of the electrode sheet (200). Further provided is an electrode sheet processing apparatus (100).

Description

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

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202421534006.2, filed on June 28, 2024, entitled "Device for accelerating rebound of pole piece and pole piece processing equipment", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of pole piece processing, in particular to a device for accelerating rebound of pole piece and pole piece processing equipment. BACKGROUND

[0004] During the production and processing of the pole piece of the battery cell, the pole piece needs to be rolled to a certain density through a rolling process, which helps to improve the energy density of the battery cell. The pole piece after rolling will rebound slightly due to the release of internal stress. The pole piece that has not released stress is assembled into the battery cell, which is easy to cause the pole piece to produce lithium precipitation phenomenon and wrinkle problem in the battery cell. Therefore, the next step of processing the pole piece needs to be carried out after the stress of the pole piece is released. The stress release of the pole piece is slow, and the rebound time of the pole piece affects the production efficiency of the pole piece. Therefore, how to accelerate the stress release of the pole piece is a problem to be solved in battery technology.

[0005] SUMMARY

[0006] The present application provides a device for accelerating rebound of pole piece and pole piece processing equipment to improve the production efficiency of the pole piece.

[0007] In a first aspect, the present application provides a device for accelerating rebound of pole piece, comprising a vibration mechanism and a plurality of transmission rollers; the plurality of transmission rollers are used for transmitting 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 for vibrating the pole piece.

[0008] In the above technical solution, the vibration mechanism is located between the two adjacent transmission rollers, and the vibration mechanism can vibrate the part of the pole piece located between the two adjacent transmission rollers, and the transmission roller transmits the pole piece to realize 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 action of the vibration mechanism to accelerate the rebound of the pole piece, thereby improving the production efficiency of the pole piece.

[0009] In some embodiments, the vibration mechanism comprises a vibration roller, and the vibration roller is used for vibrating the pole piece. By vibrating the pole piece through the vibration roller, the vibration roller can realize the 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 and reduce the risk of damage to the pole piece.

[0010] In some embodiments, the plurality of vibration rollers are arranged along a transmission direction of the pole piece. The plurality of vibration rollers can vibrate the pole piece to 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.

[0011] In some embodiments, the vibration mechanism includes a transmission belt, the transmission belt is sleeved on the plurality of vibration rollers, and the transmission belt is configured to contact and transmit the pole piece. By sleeving the transmission belt on the plurality of vibration rollers, the pole piece can be transmitted on the transmission belt, the vibration rollers can transmit vibration to the pole piece through the transmission belt to realize the vibration of the pole piece, and the transmission belt can support the pole piece to reduce the risk of wrinkling of the pole piece.

[0012] In some embodiments, the device for accelerating the rebound of the pole piece further includes an adsorption assembly configured to adsorb the pole piece to the transmission belt. By adsorbing the pole piece to the transmission belt through the adsorption assembly, the contact between the pole piece and the transmission belt is more closely, and the vibration effect of the vibration roller on the pole piece is improved.

[0013] In some embodiments, the adsorption assembly includes an adsorption head and an air extraction device in communication with the adsorption head, and the adsorption head is arranged between adjacent two vibration rollers along the transmission direction of the pole piece. By extracting the gas at the adsorption head through the air extraction device, and arranging the adsorption head between the adjacent two vibration rollers, the adsorption head can adsorb the pole piece to attach the pole piece to the transmission belt, and the vibration effect of the vibration roller on the pole piece is improved.

[0014] In some embodiments, the transmission belt is made of a breathable material, and the transmission 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 transmission belt can make the gas between the pole piece and the transmission belt pass through the transmission belt, which is conducive to attaching the pole piece to the transmission belt and improving the contact effect between the transmission belt and the pole piece.

[0015] In some embodiments, the adsorption head is adjustable along the axial position of the vibration roller. The adsorption head can adjust the position along the axial direction of the vibration roller to adsorb different positions of the transmission belt, and adjust the attachment effect between the pole piece and the transmission belt.

[0016] In some embodiments, the device for accelerating the rebound of the pole piece further includes a vibration generator connected to the vibration roller, and the vibration generator is configured to drive the vibration roller to vibrate. By using the vibration generator as a power source to vibrate the vibration roller, the vibration of the vibration roller is more stable.

[0017] In some embodiments, the plurality of vibration rollers are arranged along a transmission direction of the pole piece. The plurality of vibration rollers can vibrate the pole piece to 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.

[0018] In some embodiments, the device for accelerating the rebound of the pole piece further comprises a fixed frame and a movable frame, the vibration roller is rotatably arranged on the movable frame about an axis of the vibration roller, and the movable frame is swingably arranged on the fixed frame, and the movable frame is capable of swinging relative to the fixed frame when the vibration generator drives the vibration roller to vibrate. By arranging the movable frame to be swingable relative to the fixed frame, the swing of the movable frame can slow down the vibration transmitted from the vibration generator to the vibration roller when the vibration generator drives the vibration roller to vibrate, 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.

[0019] In some embodiments, the device for accelerating the rebound of the pole piece further comprises a detection unit and a deviation rectifying mechanism, and the detection unit and the deviation rectifying mechanism are arranged downstream of the vibration mechanism along the transmission direction of the pole piece; the detection unit is configured to detect the position of the pole piece along the width direction of the pole piece, and the deviation rectifying mechanism is configured to rectify the pole piece in response to the detection unit. By arranging the detection unit and the deviation rectifying mechanism, the deviation rectifying mechanism can rectify the pole piece, thereby reducing the risk of the pole piece deviating from the transmission roller due to vibration.

[0020] In some embodiments, the deviation rectifying mechanism comprises a deviation rectifying roller configured to rectify the pole piece. By rectifying the pole piece with the deviation rectifying roller, the deviation rectifying roller can not only rectify the pole piece, but also transmit the pole piece, thereby reducing the risk of scratching the pole piece during rectification.

[0021] In some embodiments, the plurality of transmission rollers comprises a first transmission roller and a second transmission roller, the vibration mechanism is arranged between the first transmission roller and the second transmission roller along the transmission direction, the second transmission roller is located between the first transmission roller and the deviation rectifying roller, the second transmission roller is located on one side of the pole piece along the thickness direction of the pole piece, and the first transmission roller and the deviation rectifying roller are located on the other side of the pole piece. By arranging the second transmission roller and the first transmission roller and the deviation rectifying roller on both sides of the pole piece, and arranging the second transmission roller between the first transmission roller and the deviation rectifying roller, the pole piece can be tensioned, which is conducive to the contact between the pole piece and the deviation rectifying roller, and improves the rectification effect of the pole piece.

[0022] In some embodiments, the detection unit is located between the second transmission roller and the deviation rectifying roller along the transmission direction of the pole piece. By detecting the deviation degree of the pole piece with the detection unit first, and then rectifying the deviation rectifying roller, the rectification of the pole piece can be more efficient, thereby improving the rectification effect.

[0023] In a second aspect, the embodiments of the present application provide a pole piece processing device, comprising a rolling device, a winding device, and the device for accelerating the rebound of the pole piece according to any one of the first aspect. The rolling device is located upstream of the device for accelerating the rebound of the pole piece along the transmission direction of the pole piece, and is configured to roll the pole piece. The 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 configured to collect the pole piece.

[0024] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by the drawings without creative labor for those skilled in the art.

[0026] Fig. 1 is a structural schematic diagram of a pole piece processing equipment provided by some embodiments of the present application;

[0027] Fig. 2 is a structural schematic diagram of a device for accelerating rebound of a pole piece provided by some embodiments of the present application;

[0028] Fig. 3 is a structural schematic diagram of a vibration mechanism provided by some embodiments of the present application;

[0029] Fig. 4 is a structural schematic diagram of a vibration mechanism and a suction assembly provided by some embodiments of the present application;

[0030] Fig. 5 is a structural schematic diagram of a suction assembly provided by some embodiments of the present application;

[0031] Fig. 6 is a structural schematic diagram of a vibration generator and a connecting part provided by some embodiments of the present application;

[0032] In the drawings, the drawings are not drawn according to the actual scale.

[0033] Label explanation: 100-pole piece processing equipment; 10-device for accelerating rebound of a pole piece; 1-vibration mechanism; 11-vibration roller; 12-conveying belt; 2-conveying roller; 21-first conveying roller; 22-second conveying roller; 3-suction assembly; 31-suction head; 32-exhaust device; 33-main pipe; 34-branch pipe; 4-vibration generator; 41-connecting part; 411-sleeve ring; 5-fixing frame; 6-moving frame; 61-connecting shaft; 62-oscillating rod; 7-detection unit; 71-light source receiver; 72-light source emitter; 8-correcting mechanism; 81-correcting roller; 20-rolling device; 30-winding device; 200-pole piece. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be further described in detail below in combination with the drawings and examples. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e. the present application is not limited to the described embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the use of the terms "including," "comprising," "having" and "with" in the specification and claims herein are used to mean "including but not limited to," "comprising but not limited to," "having but not limited to" or "with but not limited to," respectively, and are not used to mean "consisting only of" or "consisting exclusively of," unless otherwise indicated.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0037] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces), unless otherwise explicitly specified and limited.

[0039] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] "Plurality" appearing in the present application refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0041] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging of the battery cell.

[0042] The battery cell includes, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, and the like.

[0043] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode and can serve to reduce the risk of short circuiting between the positive electrode and the negative electrode while allowing the active ions to pass through.

[0044] In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0045] By way of example, the positive electrode current collector has two surfaces opposite in the thickness direction of the positive electrode current collector, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0046] By way of example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, and the like can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, and the like) on a polymer material base material (e.g., a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, and the like).

[0047] By way of example, the positive electrode active material can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a positive electrode active material of a battery can also be used. These positive electrode active materials can be used alone or in combination with two or more. Examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (e.g., LiFePO4 (which can also be referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (e.g., LiCoO2), lithium nickel oxide (e.g., LiNiO2), lithium manganese oxide (e.g., LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., LiNi1 / 3Co1 / 3Mn1 / 3O2), lithium nickel manganese cobalt oxide (e.g., LiNi0.5Mn0.3Co0.2O2), lithium nickel cobalt aluminum oxide (e.g., LiNi0.8Co0.1Al0.1O2), and lithium manganese iron phosphate (e.g., Li1.2Mn0.56Fe0.16PO4). 1 / 3 Co 1 / 3 Mn 1 / 3O2(also can be referred to as NCM 333 O2(also can be referred to as NCM 0.5 O2(also can be referred to as NCM 0.2 O2(also can be referred to as NCM 0.3 O2(also can be referred to as NCM 523 O2(also can be referred to as NCM 0.5 O2(also can be referred to as NCM 0.25 O2(also can be referred to as NCM 0.25 O2(also can be referred to as NCM 211 O2(also can be referred to as NCM 0.6 O2(also can be referred to as NCM 0.2 O2(also can be referred to as NCM 0.2 O2(also can be referred to as NCM 622 O2(also can be referred to as NCM 0.8 O2(also can be referred to as NCM 0.1 O2(also can be referred to as NCM 0.1 O2(also can be referred to as NCM 811 O2(also can be referred to as NCM 0.85 O2(also can be referred to as NCM 0.15 O2(also can be referred to as NCM 0.05 O2(also can be referred to as NCM

[0048] In some embodiments, the positive electrode can employ a foam metal. The foam metal can be a foam nickel, a foam copper, a foam aluminum, or a foam alloy, etc. When the foam metal is used as the positive electrode, the surface of the foam metal can not be provided with the positive electrode active material, or of course can be provided with the positive electrode active material. As an example, the foam metal can also be filled or / and deposited with a lithium source material, a potassium metal or a sodium metal, the lithium source material being a lithium metal and / or a lithium-rich material.

[0049] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0050] As an example, the negative electrode current collector can employ a metal foil, a foam metal or a composite current collector. For example, as the metal foil, silver surface treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel or titanium, etc. can be employed. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can 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 base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0051] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0052] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is provided on either one or both of the two surfaces of the negative electrode current collector.

[0053] As an example, the negative electrode active material can employ a negative electrode active material for a battery cell known in the art. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative electrode active material can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0054] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0055] In the production process of the battery cell, the electrode sheet can be rolled to a certain density to improve the energy density of the battery cell. The rolled electrode sheet will rebound appropriately due to the release of internal stress, and the electrode sheet that has not released stress is assembled into the battery cell, which is easy to cause the electrode sheet to produce lithium precipitation and wrinkling problems in the battery cell. Therefore, it is necessary to release the internal stress of the electrode sheet so that the electrode sheet rebounds and then the next step of processing the electrode sheet is performed.

[0056] To release the stress of the electrode sheet, the rolled electrode sheet can be exposed to the environment to release the stress of the electrode sheet. However, the exposed electrode sheet material is easy to oxidize and the stress release is slow, and the rebound time of the electrode sheet is long, which affects the production efficiency of the electrode sheet.

[0057] In view of this, in order to improve the production efficiency of the electrode sheet, the embodiments of the present application provide a device for accelerating the rebound of the electrode sheet. By vibrating the electrode sheet with a vibrating mechanism during the transmission of the electrode sheet by the transmission roller, the stress release of the electrode sheet is accelerated, and the rebound of the electrode sheet is promoted, thereby improving the production efficiency of the electrode sheet.

[0058] The device for accelerating the rebound of the electrode sheet disclosed in the embodiments of the present application is applicable to an electrode sheet processing equipment. The electrode sheet produced by the electrode sheet processing equipment can be used to produce a battery.

[0059] Please refer to FIG. 1, which is a structural schematic diagram of an electrode sheet processing equipment 100 provided by some embodiments of the present application. The embodiments of the present application provide an electrode sheet processing equipment 100, which includes a rolling device 20, a winding device 30, and a device for accelerating the rebound of the electrode sheet 10.

[0060] The rolling device 20 is used for rolling the pole piece 200. For example, the pole piece 200 can be rolled by a cold pressing process. The winding device 30 is used for collecting 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.

[0061] Please refer to FIG. 2, which is a structural schematic diagram of the device 10 for accelerating the rebound of the pole piece according to some embodiments of the present application. The device 10 for accelerating the rebound of the pole piece according to the embodiments of the present application comprises a vibration mechanism 1 and a plurality of transmission rollers 2. The plurality of transmission rollers 2 are used for transmitting 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 for vibrating the pole piece 200.

[0062] The transmission roller 2 is used for transmitting the pole piece 200. The plurality of transmission rollers 2 are arranged along the transmission direction of the pole piece 200. When the pole piece 200 is being transmitted, the plurality of transmission rollers 2 can be located on the same side of the pole piece 200 along the thickness direction of the pole piece 200; or part of the plurality of transmission rollers 2 can be located on one side of the pole piece 200 along the thickness direction of the pole piece 200, and the other part of the plurality of transmission rollers 2 can 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 can be a driving roller, that is, the transmission roller 2 is connected with a driving mechanism (not shown in the figure), and the driving mechanism can be a driving structure with a motor as a driving source. Alternatively, all the transmission rollers 2 can be driven rollers, which rotate in the process of transmitting the pole piece 200; for example, in the process of collecting the pole piece 200 by the winding device 30, 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.

[0063] The vibration mechanism 1 is used for vibrating the pole piece 200. The vibration mechanism 1 can directly contact the pole piece 200 to vibrate the pole piece 200.

[0064] The vibration mechanism 1 is arranged between two adjacent transmission rollers 2 along the transmission direction of the pole piece 200, that is, the vibration mechanism 1 is arranged on both sides of the transmission direction of the pole piece 200 with the transmission rollers 2. In the embodiment in which the vibration mechanism 1 is one, when the transmission rollers 2 are more than three, part of the two adjacent transmission rollers 2 can be arranged with the vibration mechanism 1, and the other part of the two adjacent transmission rollers 2 can be arranged without the vibration mechanism 1. For example, the three vibration rollers 11 are a first roller, a second roller and a third roller, respectively. The first roller and the second roller can be arranged with the vibration mechanism 1, and the second roller and the third roller can be arranged without the vibration mechanism 1; or the first roller and the second roller can be arranged without the vibration mechanism 1, and the second roller and the third roller can be arranged with the vibration mechanism 1. In the embodiment in which the vibration mechanism 1 is multiple, each vibration mechanism 1 can be arranged between different two adjacent transmission rollers 2; or multiple vibration mechanisms 1 can be arranged between the same two adjacent transmission rollers 2.

[0065] In the embodiments of the present application, the vibration mechanism 1 is located between the two adjacent transmission rollers 2, and the vibration mechanism 1 can vibrate the part of the pole piece 200 located between the two adjacent transmission rollers 2, and the vibration mechanism 1 can vibrate the pole piece 200 along with the transmission of the pole piece 200 by the transmission rollers 2 to realize the 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.

[0066] In some embodiments, please continue to refer to FIG. 2. The vibration mechanism 1 comprises a vibration roller 11, and the vibration roller 11 is used to vibrate the pole piece 200.

[0067] The vibration roller 11 can vibrate by itself to transmit the vibration to the pole piece 200 to realize the vibration of the pole piece 200; for example, the vibration roller 11 is provided with a mounting cavity in the vibration roller 11, and a vibrator is arranged in the mounting cavity, and the vibrator vibrates in the mounting cavity to realize the vibration of the vibration roller 11. The vibration roller 11 can also be connected with a vibration component, and the vibration component vibrates the vibration roller 11 to realize the vibration of the vibration roller 11 to vibrate the pole piece 200. The vibration roller 11 can be used only to vibrate the pole piece 200; the vibration roller 11 can also be used to transmit the pole piece 200.

[0068] The vibration roller 11 can be one or multiple. When the vibration roller 11 is one, one vibration roller 11 vibrates the pole piece 200. When the vibration roller 11 is multiple, multiple vibration rollers 11 can be arranged along the transmission direction of the pole piece 200, and the adjacent two vibration rollers 11 can be abutted or spaced apart. The amplitude and frequency of the multiple vibration rollers 11 vibrating the pole piece 200 can be the same or different.

[0069] By vibrating the pole piece 200 by 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 and reduce the risk of damage to the pole piece 200.

[0070] In some embodiments, please continue to refer to FIG. 2. The vibration roller 11 is multiple, and the multiple vibration rollers 11 are arranged along the transmission direction of the pole piece 200.

[0071] As an example, as shown in FIG. 2, the vibration roller 11 is three, and the three vibration rollers 11 are spaced apart along the transmission direction of the pole piece 200, and the three vibration rollers 11 can all transmit the pole piece 200 or vibrate the pole piece 200.

[0072] In the above embodiments, the multiple vibration rollers 11 can all 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.

[0073] In some embodiments, please refer to FIG. 2 and FIG. 3, FIG. 3 is a structural schematic diagram of the vibration mechanism 1 provided by some embodiments of the present application. The vibration mechanism 1 comprises a transmission belt 12, the transmission belt 12 is sleeved on a plurality of vibration rollers 11, and the transmission belt 12 is used to contact and transmit the pole piece 200.

[0074] The transmission belt 12 can be in a ring-shaped belt structure, the transmission belt 12 is sleeved on the plurality of vibration rollers 11, and the vibration rollers 11 at both ends of the transmission belt 12 can tension the transmission belt 12 so as to facilitate the transmission belt 12 to transmit the pole piece 200. The transmission belt 12 can be sleeved on all the vibration rollers 11; or the transmission belt 12 can be sleeved on part of the vibration rollers 11, and the other part of the vibration rollers 11 is located outside the transmission belt 12. When the pole piece 200 passes through the vibration mechanism 1, the transmission belt 12 can contact the pole piece 200, or part of the pole piece 200 contacts the transmission belt 12, and the other part of the pole piece 200 contacts the vibration roller 11, so as to vibrate the pole piece 200.

[0075] By sleeving the transmission belt 12 on the plurality of vibration rollers 11, the pole piece 200 can be transmitted on the transmission belt 12, the vibration roller 11 can transmit the vibration to the pole piece 200 through the transmission belt 12, the vibration of the pole piece 200 is realized, and the transmission belt 12 can support the pole piece 200, thereby reducing the risk of wrinkling of the pole piece 200.

[0076] In some embodiments, please refer to FIG. 4 and FIG. 5, FIG. 4 is a structural schematic diagram of the vibration mechanism 1 and the adsorption assembly 3 provided by some embodiments of the present application; and FIG. 5 is a structural schematic diagram of the adsorption assembly 3 provided by some embodiments of the present application. The device 10 for accelerating the rebound of the pole piece further comprises an adsorption assembly 3, and the adsorption assembly 3 is used to adsorb the pole piece 200 to the transmission belt 12.

[0077] The adsorption assembly 3 can be located above the transmission belt 12, and the adsorption assembly 3 adsorbs the gas between the transmission belt 12 and the pole piece 200, so as to make the pole piece 200 adhere to the transmission belt 12; or the transmission belt 12 can be sleeved on the adsorption assembly 3, and the adsorption assembly 3 adsorbs the gas in the inner ring of the transmission belt 12, so that the air pressure between the pole piece 200 and the transmission belt 12 and the air pressure in the inner ring of the transmission belt 12 generate a pressure difference, thereby making the pole piece 200 adhere to the transmission belt 12.

[0078] By adsorbing the pole piece 200 to the transmission belt 12 through the adsorption assembly 3, the contact between the pole piece 200 and the transmission belt 12 is more close, and the vibration effect of the vibration roller 11 on the pole piece 200 is improved.

[0079] In some embodiments, please continue to refer to FIG. 5. The adsorption assembly 3 comprises an adsorption head 31 and an air extraction device 32, the air extraction device 32 is in communication with the adsorption head 31, and the adsorption head 31 is arranged between two adjacent vibration rollers 11 along the transmission direction of the pole piece 200.

[0080] The adsorption head 31 can be fixedly arranged between the two adjacent vibration rollers 11 along the transmission direction of the pole piece 200. Alternatively, the adsorption head 31 can be adjustably arranged between the two adjacent vibration rollers 11, wherein the adsorption head 31 can be adjustably arranged in position along the transmission direction of the pole piece 200, or can be adjustably arranged in position along the axial direction of the vibration roller 11.

[0081] The transmission belt 12 can be a sealing material, and the adsorption head 31 can adsorb the gas between the pole piece 200 and the transmission belt 12 from both sides of the pole piece 200 in the width direction to achieve the adhesion of the pole piece 200 to the transmission belt 12. Alternatively, the transmission belt 12 can be a gas-permeable material, and the adsorption head 31 can adsorb the gas that penetrates the transmission belt 12, or can directly adsorb the gas between the pole piece 200 and the transmission belt 12.

[0082] The adsorption head 31 can be one or multiple. When the adsorption head 31 is multiple, one adsorption head 31 can correspond to one air extraction device 32, or multiple adsorption heads 31 can share one air extraction device 32. The adsorption head 31 has a gas suction channel therein, the gas suction channel is in communication with the air extraction device 32, and the side of the adsorption head 31 facing the pole piece 200 is provided with a gas suction hole in communication with the gas suction channel.

[0083] As an example, as shown in FIG. 5, the adsorption assembly 3 further comprises one main pipe 33 and multiple branch pipes 34, the multiple branch pipes 34 are all in communication with the main pipe 33, the air extraction device 32 is in communication with the main pipe 33, each branch pipe 34 corresponds to one adsorption head 31, and the air extraction device 32 extracts air outwardly so that the gas at the adsorption head 31 enters the main pipe 33 through the branch pipe 34 and is discharged from the air extraction device 32. The air extraction device 32 can be a driving structure with a motor as a power source. The main pipe 33 and the branch pipe can be steel pipes, plastic pipes, etc.

[0084] The air at the adsorption head 31 is extracted by the air extraction device 32, and the adsorption head 31 is arranged between the two adjacent vibration rollers 11, so that the adsorption head 31 can adsorb the pole piece 200 to adhere the pole piece 200 to the transmission belt 12, thereby improving the vibration effect of the vibration roller 11 on the pole piece 200.

[0085] In some embodiments, the transmission belt 12 is a gas-permeable material, and the transmission 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.

[0086] The transmission belt 12 can be entirely located between the polar sheet 200 and the adsorption head 31 along the thickness direction of the polar sheet 200, or partially located between the polar sheet 200 and the adsorption head 31 along the thickness direction of the polar sheet 200, or partially overlapped with the polar sheet 200 and exposed to the adsorption head 31 along the thickness direction of the polar sheet 200.

[0087] As an example, as shown in FIG. 5, the branch pipe 34 extends into the inner ring of the transmission belt 12 and communicates with the adsorption head 31, and the adsorption head 31 is entirely located in the inner ring of the transmission belt 12.

[0088] In the above embodiment, the air-permeable material of the transmission belt 12 can allow the gas between the polar sheet 200 and the transmission belt 12 to pass through the transmission belt 12, which is conducive to the adhesion of the polar sheet 200 to the transmission belt 12 and improves the contact effect between the transmission belt 12 and the polar sheet 200.

[0089] In some embodiments, the adsorption head 31 is adjustable in the axial direction of the vibration roller 11.

[0090] The device 10 for accelerating the rebound of the polar sheet can further include a fixed frame 5, and the fixed frame 5 is provided with an extension structure capable of extending and retracting in the axial direction of the vibration roller 11, and the adsorption head 31 is arranged at the extension end of the extension structure, so that the adsorption head 31 is adjustable in the axial direction of the vibration roller 11, and at least part of the branch pipe 34 moves with the adsorption head 31 when the adsorption head 31 moves. The branch pipe 34 can be a bellows.

[0091] In the above embodiment, the adsorption head 31 is adjustable in the axial direction of the vibration roller 11 to adsorb different positions of the transmission belt 12 and adjust the adhesion effect between the polar sheet 200 and the transmission belt 12.

[0092] In some embodiments, please refer to FIGS. 3-6. FIG. 6 is a structural schematic diagram of the vibration generator 4 and the connecting part 41 provided in some embodiments of the present application. The device 10 for accelerating the rebound of the polar sheet further includes a vibration generator 4 connected with the vibration roller 11, and the vibration generator 4 is configured to drive the vibration roller 11 to vibrate.

[0093] The vibration generator 4 can be directly connected with the vibration roller 11, or indirectly connected with the vibration roller 11. One vibration generator 4 can be connected with one vibration roller 11, or one vibration generator 4 can be connected with multiple vibration rollers 11.

[0094] The vibration generator 4 can be an electromagnetic vibration generator 4, a cam eccentric vibration generator 4, or the like. For example, the vibration generator 4 is an electromagnetic vibration generator 4, which 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 cycle power on or off. When the electromagnetic coil is powered on, the electromagnetic coil magnetically attracts the vibration part, and the elastic member is compressed. When the electromagnetic coil is powered off, the elastic member rebounds to vibrate the vibration part. In this way, the vibration part vibrates reciprocally. It can be understood that the vibration part is a power output end of the vibration generator 4, and the vibration roller 11 can be vibrated by the vibration part to realize vibration of the vibration roller 11.

[0095] The vibration roller 11 is vibrated by the vibration generator 4 as a power source to realize vibration of the vibration roller 11, so that the vibration of the vibration roller 11 is more stable.

[0096] In some embodiments, the vibration roller 11 is a plurality of vibration rollers 11 arranged along the transmission direction of the pole piece 200, and each vibration roller 11 is provided with one vibration generator 4.

[0097] As an example, as shown in FIG. 4, the vibration roller 11 is three, and the vibration generator 4 is three, and the vibration roller 11 corresponds to the vibration generator 4 one by one.

[0098] Each vibration generator 4 can individually vibrate one vibration roller 11, so as to adjust the vibration of the vibration roller 11 and improve the vibration effect of the pole piece 200.

[0099] In some embodiments, the device 10 for accelerating the rebound of the pole piece further includes a fixed frame 5 and a movable frame 6. The vibration roller 11 is rotatably arranged around the axis of the vibration roller 11 on the movable frame 6, 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.

[0100] As shown in FIG. 4, as an example, there are three vibration rollers 11, and three movable frames 6, one vibration roller 11 is arranged corresponding to one movable frame 6. The vibration roller 11 has a roller main body and two mounting shafts, the two mounting shafts are arranged on both sides of the roller main body along the axial direction of the roller main body, and the roller main body is rotatably arranged on the movable frame 6 through the two mounting shafts along the axial direction of the roller main body, and the movable frame 6 is swingably arranged on the fixed frame 5. The vibration generator 4 has a connecting part 41 connecting the vibration roller 11 and the output end of the vibration generator 4. One end of the connecting part 41 is hinged to the power output end of the vibration generator 4, and the other end has a sleeve ring 411 sleeved on the mounting shaft. The movable frame 6 includes a connecting shaft 61 and a swing rod 62, the connecting shaft 61 is rotatably arranged on the fixed frame 5, one end of the swing rod 62 is pivoted to the connecting shaft 61, and the other end is used for mounting 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 part 41 are arranged at an acute angle.

[0101] By arranging the movable frame 6 to be swingable relative to the fixed frame 5, when the vibration generator 4 vibrates the vibration roller 11, the swing of the movable frame 6 can slow down the vibration transmitted from the vibration generator 4 to the vibration roller 11, 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.

[0102] In some embodiments, the device 10 for accelerating the rebound of the pole piece further includes a detection unit 7 and a deviation rectifying mechanism 8, which 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 deviation rectifying mechanism 8 is used to rectify the pole piece 200 in response to the detection unit 7.

[0103] The deviation rectifying mechanism 8 can guide the transmission of the pole piece 200 to rectify the pole piece 200, or the deviation rectifying mechanism 8 can move the position of the pole piece 200 along the width direction of the pole piece 200 to rectify the pole piece 200.

[0104] The detection unit 7 can be photoelectric sensing detection, ultrasonic sensing detection, etc.

[0105] By arranging the detection unit 7 and the deviation rectifying mechanism 8, the deviation rectifying mechanism 8 can rectify the pole piece 200, thereby reducing the risk of the pole piece 200 deviating from the transmission roller 2 due to vibration.

[0106] In some embodiments, the deviation rectifying mechanism 8 includes a deviation rectifying roller 81 for rectifying the pole piece 200.

[0107] The deviation rectifying mechanism 8 can further include a driving component (not shown in the figure), which is used to drive the deviation rectifying roller 81 to move along the axial direction of the deviation rectifying roller 81, so as to drive the pole piece 200 to move along the axial direction of the deviation rectifying roller 81.

[0108] As an example, please continue to refer to FIG. 2, the detection unit 7 includes a light source emitter 72 and a light source receiver 71, the light source receiver 71 is used for receiving the light source emitted by the light source emitter 72. The light source emitter 72 and the light source receiver 71 are arranged on two sides of the pole piece 200 along the thickness direction of the pole piece 200, and along the width direction of the pole piece 200, the pole piece 200 has an edge portion. When the position of the pole piece 200 is normal, the light source emitter 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 emitter 72; when the position of the pole piece 200 is offset, the edge portion of the pole piece 200 offsets the light source emitter 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 emitter 72.

[0109] The pole piece 200 is corrected by the correction roller 81, the correction roller 81 can correct the pole piece 200 and also can transmit the pole piece 200, so as to reduce the risk of scratching the pole piece 200 when correcting.

[0110] In some embodiments, the plurality of transmission rollers 2 includes a first transmission roller 21 and a second transmission roller 22, along the transmission direction, the vibration mechanism 1 is arranged 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 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 correction roller 81 are located on the other side of the pole piece 200.

[0111] By arranging the second transmission roller 22 and the first transmission roller 21 and the correction roller 81 on two sides of the pole piece 200, and arranging the second transmission roller 22 between the first transmission roller 21 and the correction roller 81, the pole piece 200 can be tensioned, which is beneficial to the contact between the pole piece 200 and the correction roller 81, and improves the correction effect of the pole piece 200.

[0112] In some embodiments, the correction roller 81 can be a transmission roller 2.

[0113] In some embodiments, along the transmission direction of the pole piece 200, the detection unit 7 is located between the second transmission roller 22 and the correction roller 81.

[0114] By detecting the offset degree of the pole piece 200 by the detection unit 7, and then correcting the correction roller 81, the correction of the pole piece 200 can be more efficient, and the correction effect can be improved.

[0115] The embodiment of the present application provides a pole piece processing equipment 100, comprising a rolling device 20, a winding device 30 and the device 10 for accelerating pole piece rebound provided by any one 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 pole piece rebound, and the rolling device 20 is used for rolling 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 pole piece rebound, and the winding device 30 is used for collecting the pole piece 200.

[0116] Please refer to FIG. 2-6, the embodiment of the present application provides a device 10 for accelerating pole piece rebound, which comprises a vibration mechanism 1 and a plurality of transmission rollers 2, the vibration mechanism 1 comprises a transmission belt 12, a suction assembly 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 suction assembly 3 is used for adsorbing the pole piece 200 to the transmission belt 12, the vibration generator 4 is used for vibrating the vibration roller 11, and the vibration roller 11 transmits vibration to the pole piece 200 through the transmission belt 12 to vibrate the pole piece 200.

[0117] The vibration mechanism 1 is located between the two adjacent transmission rollers 2, and the vibration mechanism 1 can vibrate the part of the pole piece 200 between the two adjacent transmission rollers 2, and the transmission roller 2 transmits the pole piece 200 to realize the vibration of the pole piece 200. The pole piece 200 is adsorbed on the transmission belt 12 by the suction assembly 3, so that the pole piece 200 and the transmission belt 12 are more closely contacted, and the vibration effect of the vibration roller 11 on the pole piece 200 is improved. By vibrating the pole piece 200 through the vibration mechanism 1, the internal stress release of the pole piece 200 can be accelerated under the vibration action 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.

[0118] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for accelerating electrode rebound, comprising: Multiple transfer rollers are used to transfer the electrode sheets; A vibration mechanism is disposed between two adjacent transmission rollers along the transmission direction of the electrode sheet, and the vibration mechanism is used to vibrate the electrode sheet.

2. The apparatus for accelerating electrode rebound as described in claim 1, wherein, The vibration mechanism includes a vibration roller, which is used to vibrate the electrode.

3. The apparatus for accelerating electrode rebound as described in claim 2, wherein, There are multiple vibrating rollers, and the multiple vibrating rollers are arranged along the transmission direction of the electrode sheet.

4. The apparatus for accelerating electrode rebound as described in claim 3, wherein, The vibration mechanism includes a conveyor belt sleeved on a plurality of the vibration rollers, and the conveyor belt is used to contact and transport the electrode sheet.

5. The apparatus for accelerating electrode rebound as described in claim 4, wherein, The device for accelerating electrode rebound also includes an adsorption component for adsorbing the electrode onto the conveyor belt.

6. The apparatus for accelerating electrode rebound as described in claim 5, wherein, The adsorption assembly includes an adsorption head and an air extraction device. The air extraction device is connected to the adsorption head and is positioned between two adjacent vibrating rollers along the transmission direction of the electrode.

7. The apparatus for accelerating electrode rebound as described in claim 6, wherein, The conveyor belt is made of breathable material and is at least partially located between the electrode and the adsorption head to separate the electrode and the adsorption head.

8. The apparatus for accelerating electrode rebound as described in claim 6 or 7, wherein, The position of the adsorption head along the axial direction of the vibrating roller is adjustable.

9. The apparatus for accelerating electrode rebound as described in any one of claims 2-8, wherein, The device for accelerating electrode rebound also includes a vibration generator connected to the vibration roller, which is configured to drive the vibration roller to vibrate.

10. The apparatus for accelerating electrode rebound as described in claim 9, wherein, There are multiple vibrating rollers, which are arranged along the transmission direction of the electrode sheet, and each vibrating roller is provided with a vibration generator.

11. The apparatus for accelerating electrode rebound as described in claim 9 or 10, wherein, The device for accelerating electrode rebound also includes a fixed frame and a movable frame. The vibrating roller is rotatably mounted on the movable frame about its own axis, and the movable frame is swingably mounted on the fixed frame. When the vibration generator drives the vibrating roller to vibrate, the movable frame can swing relative to the fixed frame.

12. The apparatus for accelerating electrode rebound as described in any one of claims 1-11, wherein, The device for accelerating electrode rebound also includes a detection unit and a correction mechanism, which are located downstream of the vibration mechanism along the transmission direction of the electrode. The detection unit is used to detect the position of the electrode along the width direction of the electrode, and the correction mechanism responds to the detection unit to correct the electrode.

13. The apparatus for accelerating electrode rebound as described in claim 12, wherein, The correction mechanism includes a correction roller, which is used to correct the deviation of the electrode sheet.

14. The apparatus for accelerating electrode rebound as described in claim 13, wherein, The plurality of transmission rollers include a first transmission roller and a second transmission roller. Along the transmission direction, the vibration mechanism is disposed between the first transmission roller and the second transmission roller. The second transmission roller is located between the first transmission roller and the correction roller. Along the thickness direction of the electrode sheet, the second transmission roller is located on one side of the electrode sheet, and the first transmission roller and the correction roller are located on the other side of the electrode sheet.

15. The apparatus for accelerating electrode rebound as described in claim 14, wherein, Along the transmission direction of the electrode sheet, the detection unit is located between the second transmission roller and the correction roller.

16. An electrode processing apparatus, comprising: The apparatus for accelerating electrode rebound according to any one of claims 1-15; A rolling device is located upstream of the device that accelerates the rebound of the electrode sheet, along the conveying direction of the electrode sheet; the rolling device is used to roll the electrode sheet. A winding device is located downstream of the device that accelerates the rebound of the electrode sheet, along the transport direction of the electrode sheet, and is used to collect the electrode sheet.

Images