A pole piece processing apparatus

Abstract

The application provides a kind of pole piece processing equipment, belongs to battery recycling technical field, equipment includes: shell, and conveying mechanism and separation device arranged in shell;Separation device is fixedly spaced along the direction of the conveying line of conveying mechanism;Under the action of conveying mechanism, whole pole piece passes separation device in turn to separate current collector layer and active material layer in pole piece. Adopt the pole piece processing equipment provided in the application, active material and current collector can be separated under the premise of guaranteeing the structural integrity of current collector, so as to guarantee the recycling value of current collector.

Description

Technical Field

[0001] This application belongs to the field of battery recycling technology, specifically relating to an electrode processing device. Background Technology

[0002] Batteries are widely used in various electronic devices. Within the battery cell, the positive and negative electrodes contain current collectors made of metal, which are bonded with active materials. Current collectors have a certain recycling value, and how to obtain current collectors from discarded batteries is an important issue in the field of battery recycling.

[0003] In related technologies, current collectors and active materials are separated by physical crushing. By physically crushing the electrode, the electrode is broken into a large number of particles. Due to the difference in ductility between the current collector and the active material, the active material will be broken into smaller particles, while the current collector will be broken into larger particles. By screening out the larger particles, the current collector and the active material can be separated.

[0004] However, after the electrode is crushed, small current collector particles may appear. That is, physical crushing cannot guarantee that all current collectors in the electrode can be recovered, and physical crushing will cause structural damage to the current collector, affecting its recycling value. In summary, the relevant technology cannot obtain a complete current collector. Utility Model Content

[0005] This application aims to provide an electrode processing device that at least solves the problem in the prior art that the complete current collector cannot be obtained due to physical crushing.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] This application provides an electrode processing device, which includes: a housing, and a conveying mechanism and a separating device disposed within the housing;

[0008] The separation devices are arranged at fixed intervals along the direction of the conveying line of the conveying mechanism;

[0009] Under the action of the conveying mechanism, the entire electrode sheet passes through the separation device in sequence to separate the current collector layer and the active material layer in the electrode sheet.

[0010] Optionally, the separation device includes, in sequence along the conveying direction: a first heating device, a vibration device, and a second heating device;

[0011] The first heating device is used to heat the electrode to remove the binder between the current collector layer and the active material layer;

[0012] The vibration device is used to cause the electrode to vibrate, thereby causing the active material layer to break.

[0013] The second heating device is used to generate and deliver a high-temperature, high-pressure airflow to the surface of the electrode to scrape off the residual active material layer on the current collector layer.

[0014] Optionally, the conveying mechanism includes: multiple sets of conveying rollers arranged symmetrically along the direction of the conveying line;

[0015] The separation device and the multiple sets of conveying rollers are arranged alternately at intervals;

[0016] The side of the conveying roller is provided with a driving mechanism. Under the action of the driving mechanism, two conveying rollers in each group of conveying rollers rotate towards each other to push the electrode sheet to move along the direction of the conveying line.

[0017] Optionally, the drive mechanism includes a first drive member, a sprocket and chain mechanism, and a first transmission member;

[0018] The transmission component is coaxially arranged with the conveying roller, and the two first transmission components corresponding to each group of conveying rollers rotate in opposite directions;

[0019] The sprocket and chain mechanism includes a first sprocket and a plurality of second sprockets; the second sprockets are coaxially arranged with a conveying roller disposed on the same side of the conveying line; the second sprockets are connected to the output end of the first drive member.

[0020] Optionally, the first heating device includes a plurality of eddy current heating coils;

[0021] The plurality of eddy current heating coils are arranged side by side at intervals to form a heating array, and the heating array faces the conveying line.

[0022] Optionally, the vibration device includes: a support frame, a second drive element, and a plurality of vibrators;

[0023] The bracket is fixedly connected to the housing; the second driving component is fixedly connected to the bracket.

[0024] Multiple vibrators are fixedly connected to the bracket at parallel intervals along a direction perpendicular to the conveying line; the working part of each vibrator is aligned with the conveying line; the output end of the second drive member is simultaneously connected to the drive parts of the multiple vibrators.

[0025] Optionally, the drive unit of the vibrator includes: an eccentric wheel push rod mechanism, a second transmission component, and a fixed column;

[0026] The drive unit is fixedly connected to the bracket via the fixed column; the eccentric wheel in the eccentric wheel push rod mechanism is rotatably connected to the fixed column, and the eccentric wheel is connected to the output end of the second drive unit via the second transmission component; one end of the push rod of the eccentric wheel push rod mechanism is connected to the eccentric shaft of the eccentric wheel.

[0027] The working part of the vibrator includes: a limiting sleeve and a vibrating block;

[0028] The output end is fixedly connected to the bracket by a limiting sleeve; the limiting sleeve is sleeved on the vibrating block, one end of the vibrating block is connected to the other end of the push rod, and the other end of the vibrating block is aligned with the conveying line; under the action of the second driving member, the vibrating block reciprocates linearly relative to the limiting sleeve.

[0029] Optionally, the second heating device includes: a first fan, a first air supply duct connected to the first fan, and a heater;

[0030] The first fan is used to deliver airflow to the first air supply duct;

[0031] The first air supply duct passes through the heater; the first air supply duct includes a plurality of first air outlets, which are arranged parallel to each other at a distance from the first air supply duct at one end away from the first fan in a direction perpendicular to the conveying line; the first air outlets are aligned with the conveying line; the end of the first air outlet is a flat opening.

[0032] Optionally, the separation device further includes an air supply device; the air supply device includes a second fan and a second air supply duct connected to the second fan;

[0033] The second fan is used to deliver airflow to the second air supply duct;

[0034] The second air outlet of the second air supply duct is aligned with at least part of the conveying mechanism from one side of the housing, and a gap is left between the inner wall of the opposite side of the housing and the conveying mechanism.

[0035] Optionally, the direction of the conveying line is parallel to the direction of gravity.

[0036] Optionally, the equipment may further include: a screening device;

[0037] The sieving device is used to collect the active material layer;

[0038] The screening device includes: a screen, a third drive unit, a collection slope, and a collection container;

[0039] The screen is electrically connected to the third driving component;

[0040] The screening device is fixedly installed inside the housing via the collection container; one side of the collection container is provided with a collection outlet, and the other side of the collection container is provided with an opening facing the separation device;

[0041] The screen is fixedly disposed between the collection outlet and the opening; the collection slope is disposed on the side of the screen facing the collection outlet; the higher end of the collection slope is connected to one end of the screen, and the lower end of the collection slope is connected to the collection outlet.

[0042] Optionally, the electrode processing equipment includes an inlet and an outlet;

[0043] The conveying line extends from the inlet to the outlet; the screening device is also used to change the direction of movement of the current collector layer in the conveying line, so that the current collector layer is removed from the electrode processing equipment through the outlet; the size of the inlet is larger than the cross-sectional size of the electrode; the size of the outlet is larger than the cross-sectional size of the current collector layer.

[0044] In this embodiment, the electrode processing equipment includes a housing, a conveying mechanism, and a separation device. Multiple separation devices are sequentially and spaced along the conveying line of the conveying mechanism. This allows the electrode to be fed into the conveying mechanism and pass sequentially through each separation device. Through the action of these multiple separation devices, the active material layer can be peeled off from the electrode, separating the active material layer on the outer side of the electrode while retaining the current collector on the inner side. Compared to related technologies, the electrode processing equipment provided in this embodiment does not require physical crushing of the current collector. It achieves the separation of the active material and the current collector in the electrode without damaging the structural integrity of the current collector, thus ensuring the recycling value of the current collector in the electrode. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0046] Figure 1 This is an isometric structural schematic diagram of an electrode processing device provided in an embodiment of this application;

[0047] Figure 2 This is an embodiment of the present application. Figure 1 A front view schematic diagram of an electrode processing device is provided.

[0048] Figure 3 This is a side view structural diagram of an electrode sheet provided in an embodiment of this application;

[0049] Figure 4 This is an embodiment of the present application. Figure 1A side view schematic diagram of an electrode processing device is provided;

[0050] Figure 5 This is an embodiment of the present application. Figure 4 A magnified schematic diagram of the vibrator in the diagram;

[0051] Figure 6 This is an embodiment of the present application. Figure 4 A magnified schematic diagram of the vibrator along AA;

[0052] Figure 7 This is an embodiment of the present application. Figure 4 A partial top view of the air supply device in the diagram;

[0053] Figure 8 This is an embodiment of the present application. Figure 7 The air supply device in the middle is along the cross section of BB;

[0054] Figure 9 This is an embodiment of the present application. Figure 1 A side view of the screening device in the diagram;

[0055] Figure 10 This is an embodiment of the present application. Figure 9 Top view of the structure of the medium screen

[0056] Figure label:

[0057] 1. Housing; 2. Conveying mechanism; 21. Conveying roller; 22. Drive mechanism; 211. First conveying roller; 212. Second conveying roller; 213. Third conveying roller; 214. Fourth conveying roller; 221. First driving component; 222. Sprocket and chain mechanism; 223. First transmission component; 2221. First sprocket; 2222. Second sprocket; 3. Separating device; 31. First heating device; 32. Vibration device; 33. Second heating device; 34. Air supply device; 311. Eddy current heating coil; 321. Support; 322. Second driving component; 323. Vibrator; 3231. Drive unit; 3232. Working unit; 32311. Eccentric wheel pusher 32312, second transmission component; 32313, fixed column; 32314, ball bearing; 323111, eccentric wheel; 323112, push rod; 32321, limiting sleeve; 32322, vibrating block; 331, first fan; 332, first air supply duct; 333, heater; 3321, first air outlet; 341, second fan; 342, second air supply duct; 3421, second air outlet; 4, electrode plate; 41, current collector layer; 42, active material layer; 5, screening device; 51, screen; 52, third driving component; 53, collection container; 511, through hole; 531, collection outlet; 532, opening; 533, collection slope. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] Combined with reference Figure 1 and Figure 2 , Figure 1 This is an isometric structural diagram of an electrode processing device provided in an embodiment of this application. Figure 2 This is an embodiment of the present application. Figure 1 A front view structural diagram of an electrode processing device is provided. This application provides an electrode processing device, which includes: a housing 1, and a conveying mechanism 2 and a separation device 3 disposed in the housing 1; the separation device 3 is fixedly spaced along the conveying line X of the conveying mechanism 2; under the action of the conveying mechanism 2, the entire electrode 4 passes through the separation device 3 in sequence to separate the current collector layer 41 and the active material layer 42 in the electrode 4.

[0061] Reference Figure 3 , Figure 3This is a side view of the electrode 4 processed by an electrode processing device provided in this application embodiment. The battery electrode 4 consists of a current collector layer 41 located inside the electrode 4 and an active material layer 42 disposed on both sides of the current collector layer 41. Active material particles are adhered to the current collector layer 41 by an adhesive to form the active material layer 42. The current collector layer 41 is generally a metal such as aluminum foil or copper foil, which has high recycling value. In order to separate the current collector layer 41 and the active material layer 42, this application embodiment provides an electrode processing device, including a housing 1. The housing 1 includes a conveying mechanism 2 and a separation device 3. The conveying mechanism 2 is used to transport the electrode sheet 4 so that the electrode sheet 4 travels along a preset line and a conveying line. At the same time, multiple separation devices are set on the conveying line to separate the current collector layer 41 and the active material layer 42 from the electrode sheet 4. Through the conveying mechanism 2, the entire electrode sheet 4 passes through the separation devices in sequence. Based on different types of separation devices, different separation processes are completed in sequence. Thus, at the end of the conveying line, the active material layer 42 is peeled off from the entire electrode sheet 4 to obtain the complete current collector layer 41.

[0062] The electrode processing equipment provided in this application embodiment directly processes the entire electrode 4. Through multiple separation devices, the active material layer 42 on the surface of the electrode 4 is processed to complete the separation of the active material layer 42 from the current collector layer 41. There is no need to physically crush the electrode 4, thereby avoiding physical damage to the structure of the current collector layer 41 inside the electrode 4 and ensuring the recycling value of the current collector layer 41.

[0063] For example, the separation device for separating the active material layer 42 includes, but is not limited to: a separation device for removing adhesive, such as removing adhesive by heating element; and a separation device for peeling off the active material layer 42, such as removing the active material layer 42 without adhesive from the current collector layer 41 by applying vibration or friction to the electrode 4.

[0064] For example, when the electrode 4 passes through the separation device, the electrode 4 should have a certain height so that the peeled active material layer 42 can fall due to gravity, exposing the current collector layer 41 inside the electrode 4; for this purpose, in the embodiments provided in this application, the conveying line can be configured to be parallel to the direction of gravity; or, in embodiments not shown in this application, the conveying line can be parallel to the ground, but no platform is provided, so that the electrode 4 entering the device has a certain height difference from the ground.

[0065] In this embodiment, the electrode processing equipment includes a housing 1, a conveying mechanism 2, and a separation device 3. The separation devices 3 are arranged sequentially at intervals along the conveying line of the conveying mechanism 2, thereby allowing the electrode 4 to be fed into the conveying mechanism 2 and pass through each separation device in sequence. Through the action of multiple separation devices, the active material layer 42 can be peeled off from the electrode 4, so that the active material layer 42 located on the outside of the electrode 4 is separated from the electrode 4, while retaining the current collector on the inside of the electrode 4. Compared with related technologies, the electrode processing equipment provided in this embodiment does not require physical crushing of the current collector. Without damaging the structural integrity of the current collector, it achieves the separation of the active material and the current collector in the electrode 4, ensuring the recycling value of the current collector in the electrode 4.

[0066] Optionally, in conjunction with reference Figure 1 , Figure 2 and Figure 4 ; Figure 4 This is an embodiment of the present application. Figure 1 A side view schematic diagram of an electrode processing device is provided; Figure 1 , Figure 2 and Figure 4 A preferred embodiment of the electrode processing device of this application is shown. The separation device includes, in sequence along the conveying direction: a first heating device 31, a vibration device 32, and a second heating device 33; the first heating device 31 is used to heat the electrode 4 to remove the adhesive between the current collector layer 41 and the active material layer 42; the vibration device 32 is used to cause the electrode 4 to vibrate so that the active material layer 42 breaks; the second heating device 33 is used to generate and convey a high-temperature and high-pressure airflow to the surface of the electrode 4 to scrape off the residual active material layer 42 on the current collector layer 41.

[0067] In the electrode processing equipment provided in the embodiments of this application, a preferred arrangement of the separation devices is to allow the electrode 4 to pass through the first heating device 31, the vibration device 32, and the second heating device 33 in sequence.

[0068] In the battery, the adhesive includes polyvinylidene fluoride (PVDF), which can be brought into or above a preset temperature range (e.g., 210-230°C) by the first heating device 31, thereby causing the PVDF to enter a molten state, lose its adhesive properties, and drip off the electrode 4. Since the current collector layer 41 is a metal with a high melting point, such as aluminum foil with a melting point of 660°C and copper foil with a melting point of 1083°C, its melting point is generally higher than that of the adhesive. Therefore, the integrity of the current collector layer 41 will not be damaged by the first heating device 31.

[0069] For example, the first heating device 31 may include a resistance heater 333 (such as a heating wire), an electromagnetic heater 333 (such as an eddy current coil), an infrared heater 333, a fluid medium heater 333 (such as a thermal oil heater 333), etc.

[0070] After being heated by the first heating device 31, the electrode 4 is then moved into the vibration device 32. The vibration device 32 is used to make the electrode 4 vibrate at a high frequency, which disrupts the stress balance inside the active material layer 42, causing the active material layer 42, which has lost the adhesive bond, to break into blocks or granules, and then fall off due to gravity. Since the current collector layer 41 is metal, it has higher toughness than the active material, so the vibration device 32 will not cause structural damage to the current collector.

[0071] For example, the vibration device 32 can cause the electrode 4 to vibrate by tapping or striking the surface of the electrode 4.

[0072] After passing through the vibration device 32, due to factors such as incomplete removal of the adhesive by the first heating device 31 (e.g., the adhesive was not completely dripped off before re-cooling), some active material layer 42 may still remain on the electrode 4. Therefore, the electrode 4 can be passed through the second heating device 33 to remove the adhesive that the first heating device 31 failed to completely remove. The second heating device 33 is configured to generate a high-temperature, high-pressure airflow, thereby scraping off the remaining active material layer 42 while heating the adhesive, promoting complete separation of the active material layer 42 from the current collector layer 41. The temperature of the high-temperature, high-pressure airflow should be lower than the melting point of the current collector layer 41 to avoid damaging the integrity of the current collector layer 41; simultaneously, the air pressure of the high-temperature, high-pressure airflow should be sufficient to blow off any remaining active material layer 42 that has lost its adhesive but has not detached from the electrode 4.

[0073] Optionally, in conjunction with reference Figure 1 and Figure 4 The conveying mechanism 2 includes: multiple sets of conveying rollers 21 arranged symmetrically along the direction X of the conveying line; a separation device and multiple sets of conveying rollers 21 arranged alternately; a driving mechanism 22 is provided on the side of the conveying rollers 21, and under the action of the driving mechanism 22, two conveying rollers 21 in each set of conveying rollers 21 rotate towards each other to push the electrode 4 to move along the direction X of the conveying line.

[0074] In this embodiment, multiple sets of conveying rollers 21 are used to move the electrode 4. Each set of conveying rollers 21 consists of two conveying rollers 21 that can rotate in opposite directions. Under the action of the driving mechanism 22, the electrode 4 is moved into the gap between the two conveying rollers 21 in each set of conveying rollers 21, pressed and pushed by the rolling surface of the conveying rollers 21 to move along the conveying line. It should be noted that the rolling surface of the conveying rollers 21 should be made of elastic material to ensure that the two conveying rollers 21 in each set of conveying rollers 21 can press the electrode 4 or the current collector layer 41.

[0075] Reference Figure 4 In a preferred embodiment of this application, four sets of conveying rollers 21 are arranged in sequence: a first conveying roller 211, a second conveying roller 212, a third conveying roller 213, and a fourth conveying roller 214. The first conveying roller 211 is located at the top inside the housing 1 and is used to receive the electrode 4. Along the conveying line, after the first conveying roller 211, a first heating device 31 and a second conveying roller 212 are arranged in sequence. The electrode 4 is fed into the vibration device 32 through the second conveying roller 212. After the vibration device 32, a third conveying roller 213 is arranged so that the electrode 4 is moved into the second heating device 33. After the second heating device 33, a fourth conveying roller 214 is arranged so that the electrode 4 is moved out of the second heating device 33.

[0076] By alternating and spacing multiple sets of conveyor rollers 21 and separation devices, it can be ensured that the electrode sheets 4 pass through the separation devices sequentially according to the conveyor line, thereby ensuring the smooth progress of each separation process.

[0077] Optionally, refer to Figure 3 The drive mechanism 22 includes a first drive member 221, a sprocket and chain mechanism 222, and a first transmission member 223. The transmission member is coaxially arranged with the conveying roller 21, and the two first transmission members 223 corresponding to each group of conveying rollers 21 rotate in opposite directions. The sprocket and chain mechanism 222 includes a first sprocket 2221 and a plurality of second sprockets 2222. The second sprockets 2222 are coaxially arranged with the conveying roller 21 arranged on the same side of the conveying line. The second sprockets 2222 are connected to the output end of the first drive member 221.

[0078] In the embodiments provided in this application, the main body of the drive mechanism 22 adopts a sprocket and chain mechanism 222, including a first sprocket 2221 installed at the output end of the first drive member 221, and a plurality of second sprockets 2222 installed on the side of the drum; the second sprockets 2222 are coaxially arranged with the conveying drum 21 arranged on the same side of the conveying line. By driving the first sprocket 2221 to rotate, the first drive member 221 can drive the second sprockets 2222 to rotate in the same direction. When the size of the second sprockets 2222 is the same, the second sprockets 2222 can also be driven to rotate at the same linear speed; the second sprockets 2222 can drive the conveying drum 21 arranged on the same side of the conveying line to rotate synchronously.

[0079] In each set of conveyor rollers 21, a first transmission member 223 is provided on the side of two conveyor rollers 21 respectively. The first transmission member 223 is coaxially fixed with the conveyor rollers 21, and the two first transmission members 223 in each set of conveyor rollers 21 can rotate in opposite directions. Thus, by only driving the conveyor rollers 21 set on the same side of the conveying line to rotate, all the conveyor rollers 21 can be driven to rotate, thereby ensuring the continuous movement of the electrode 4 on the conveying line.

[0080] For example, the first transmission component 223 in each set of conveyor rollers 21 includes two meshing gears; the gears, the second sprocket 2222, and the conveyor rollers 21 are coaxially fixed.

[0081] For example, the first transmission member 223 can be disposed between the second sprocket 2222 and the side of the conveying roller 21, or the first transmission member 223 can be disposed on the outside of the second sprocket 2222, so that the second sprocket 2222 is connected to the side of the conveying roller 21; or the first transmission member 223 can be disposed on the opposite side of the conveying roller 21.

[0082] Optionally, the first heating device 31 includes a plurality of eddy current heating coils 311; the plurality of eddy current heating coils 311 are arranged side by side at intervals to form a heating array, the heating array facing the conveying line.

[0083] Reference Figure 1 In a preferred embodiment of the first heating device 31, a plurality of eddy current heating coils 311 are provided. By arranging the eddy current heating coils 311 at intervals and side by side, a heating array can be formed, with its heating surface facing the conveying line. On the one hand, the eddy current heating coils 311 have high heating efficiency and are easy to control, and can be raised to the preset temperature in a short time, thereby generating enough heat to heat the electrode 4, so that the adhesive in the electrode 4 is converted into a molten state and drips down. On the other hand, by setting it as a heating array, it can be ensured that the electrode 4 is uniformly heated when passing through the first heating device 31, and the adhesive between the current collector layer 41 and the active material layer 42 in the electrode 4 is removed to the greatest extent.

[0084] Optionally, refer to Figure 5 , Figure 5 This is an embodiment of the present application. Figure 4 An enlarged structural diagram of the vibrator 323 is shown below. The vibration device 32 includes: a support 321, a second drive member 322, and multiple vibrators 323. The support 321 is fixedly connected to the housing 1. The second drive member 322 is fixedly connected to the support 321. Multiple vibrators 323 are fixedly connected to the support 321 in parallel at intervals along a direction X perpendicular to the conveying line. The working part 3232 of the vibrator 323 is aligned with the conveying line. The output end of the second drive member 322 is simultaneously connected to the drive part 3231 of the multiple vibrators 323.

[0085] The vibration device 32 can be fixed in the housing 1 by a U-shaped bracket 321. The second drive member 322 of the vibration device 32 is set on one side of the bracket 321, while the vibrators 323 in the vibration device 32 are arranged parallel to each other in the U-shaped groove of the bracket 321 along the direction X perpendicular to the conveying line. The output end of the second drive member 322 is simultaneously connected to the drive part 3231 of the vibrator 323. Through the second drive member 322, the drive parts 3231 of multiple vibrators 323 can be driven simultaneously, thereby driving multiple vibrators 323 to work at the same time. The vibrators 323 are arranged perpendicular to the conveying line and spaced apart. The width of the array of multiple vibrators 323 matches the width of the electrode 4, so that when the electrode 4 passes through the vibration device 32, the surface facing the vibrator 323 can fully contact the working part 3232 of the vibrator 323, thereby ensuring the crushing effect of the vibrator 323 on the active material layer 42.

[0086] For example, a one-to-many transmission connection between the output end of the second drive unit 322 and the drive unit 3231 of the vibrator 323 can be achieved by using a worm gear or a spatial coupling.

[0087] Optional, in conjunction with reference Figure 5 and Figure 6 ,in, Figure 6 This is an embodiment of the present application. Figure 4 The diagram shows an enlarged view of the vibrator 323 along line AA. The drive unit 3231 of the vibrator 323 includes: an eccentric wheel push rod mechanism 32311, a second transmission component 32312, and a fixed column 32313. The drive unit 3231 is fixedly connected to the bracket 321 via the fixed column 32313. The eccentric wheel 323111 in the eccentric wheel push rod mechanism 32311 is rotatably connected to the fixed column 32313, and the eccentric wheel 323111 is connected to the output end of the second drive component 322 via the second transmission component 32312. The push rod 3231 of the eccentric wheel push rod mechanism 32311... One end of 12 is connected to the eccentric shaft of the eccentric wheel 323111; the working part 3232 of the vibrator 323 includes: a limiting sleeve 32321 and a vibrating block 32322; the output end is fixedly connected to the bracket 321 through the limiting sleeve 32321; the limiting sleeve 32321 is sleeved on the vibrating block 32322, one end of the vibrating block 32322 is connected to the other end of the push rod 323112, and the other end of the vibrating block 32322 is aligned with the conveying line; under the action of the second driving member 322, the vibrating block 32322 performs reciprocating linear motion relative to the limiting sleeve 32321.

[0088] The main function of the vibrator 323 is to cause the electrode 4 in contact with it to vibrate. To this end, this application provides a vibrator 323, which includes a drive part 3231 and a working part 3232. The drive part 3231 is responsible for receiving and transmitting the input excitation from the second drive member 322, and converting the rotation output by the second drive member 322 into the reciprocating linear motion of the working part 3232, thereby realizing that the working part 3232 repeatedly hits and impacts the electrode 4, causing the electrode 4 to vibrate.

[0089] Specifically, the drive unit 3231 includes an eccentric wheel push rod mechanism 32311, a second transmission component 32312, and a fixed column 32313. One end of the fixed column 32313 is fixedly mounted on the inner wall of one side of the support 321. The other end of the fixed column 32313 is rotatably connected to the eccentric wheel 323111 in the eccentric wheel push rod mechanism 32311 via a bearing, allowing the eccentric wheel 323111 to rotate around the fixed column 32313. A groove and ball bearing 32314 can be provided at the top of the fixed column 32313, allowing the top of the fixed column 32313 to connect with the eccentric wheel 32311 through the ball bearing 32314. The eccentric wheel 323111 is indirectly connected, thereby reducing the sliding friction between the eccentric wheel 323111 and the fixed column 32313 when the eccentric wheel 323111 rotates, and reducing the excitation loss input to the drive unit 3231; the eccentric wheel 323111 receives the input excitation from the second drive member 322 through the second transmission member 32312; the second transmission member 32312 can be sleeved on the outside of the eccentric wheel 323111, so that the second transmission member 32312 and the eccentric wheel 323111 rotate coaxially, and the second drive member 322 drives the second transmission member 32312 to drive the eccentric wheel 323111 to rotate.

[0090] The working part 3232 is fixedly mounted on the inner wall of the opposite side of the bracket 321 via the limiting sleeve 32321; the push rod 323112 of the eccentric wheel push rod mechanism 32311 is connected at one end to the eccentric shaft of the eccentric wheel 323111 and at the other end to the vibrating block 32322 of the working part 3232, and the vibrating block 32322 is set inside the limiting sleeve 32321; a sliding groove is provided inside the sleeve, and the vibrating block 32322 can make linear motion perpendicular to the conveying line through the protrusion on the vibrating block 32322, while the reciprocating linear motion of the vibrating block 32322 can be realized through the eccentric wheel push rod mechanism 32311; after the electrode 4 enters the vibration device 32, the end of the vibrating block 32322 away from the push rod 323112 continuously hits and impacts the surface of the electrode 4, thereby causing the active material layer 42 on the surface of the electrode 4 to break into fragments or particles and fall off.

[0091] For example, the eccentric wheel push rod mechanism 32311 in the drive unit 3231 can be replaced by a cam push rod mechanism.

[0092] Optional, refer to Figure 1 , Figure 7 and Figure 8 ,in, Figure 7 This is an embodiment of the present application. Figure 1 A top view of part of the air supply device 34. Figure 8 This is an embodiment of the present application. Figure 7 The air supply device 34 is located along the cross section of BB; the second heating device 33 includes: a first fan 331, a first air supply duct 332 connected to the first fan 331, and a heater 333; the first fan 331 is used to supply airflow to the first air supply duct 332; the first air supply duct 332 passes through the heater 333; the first air supply duct 332 includes a plurality of first air outlets 3321, which are parallel to each other and spaced apart along the direction X perpendicular to the conveying line at one end of the first air supply duct 332 away from the first fan 331; the first air outlets 3321 are aligned with the conveying line; the end of the first air outlets 3321 is a flat opening 532.

[0093] Airflow is generated by the first fan 331 and transported to the working position through the first air supply duct 332. The end of the first air supply duct 332 away from the first fan 331 is located between the third conveying roller 213 and the fourth conveying roller 214. The first air supply duct 332 passes through the heater 333 to heat the first air supply duct 332, thereby generating a high-temperature airflow. Multiple first air outlets 3321 are arranged parallel to each other at intervals at the end of the first air supply duct 332 away from the first fan. The width of the array of first air outlets 3321 matches the width of the electrode 4, thereby ensuring that the surface of the electrode 4 facing the first air outlet 3321 can receive air evenly after entering the second heating device 33.

[0094] The end of the first air outlet 3321 is a flat opening 532, meaning the cross-sectional area of ​​the first air outlet 3321 decreases at the end, thereby increasing the pressure of the high-temperature airflow at the end and ultimately generating a high-temperature, high-pressure airflow. The high-temperature, high-pressure airflow can sweep the surface of the electrode 4, removing any broken but not detached active material layer 42 from the substrate surface, or removing adhesives that were not removed in the previous process, thereby promoting the detachment of the remaining active material layer 42.

[0095] Optionally, the separation device 3 further includes an air supply device 34; the air supply device 34 includes a second fan 341 and a second air supply duct 342 connected to the second fan 341; the second fan 341 is used to supply airflow to the second air supply duct 342; the second air outlet 3421 of the second air supply duct 342 is aligned with at least part of the conveying mechanism 2 from one side of the housing 1, and a gap is left between the inner wall of the opposite side of the housing 1 and the conveying mechanism 2.

[0096] During the process of peeling off the active material layer 42, the detached active material layer 42 may fall onto the conveying mechanism 2. To address this, an air supply device 34 can be added. The second air outlet 3421 of the air supply device 34 is aligned with at least part of the conveying mechanism 2 from one side of the inner wall of the housing 1. It mainly includes a second conveying roller 212, a third conveying roller 213, and a fourth conveying roller 214, which are used to blow the active material layer 42 that has fallen onto these conveying mechanisms 2 to the opposite side of the inner wall of the housing 1 by airflow. A gap is left between the opposite side of the housing 1 and the conveying mechanism 2 to ensure that the active material layer 42 that reaches the other side of the inner wall of the housing 1 falls to the bottom of the housing 1 by gravity, thus avoiding the active material from blocking the operation of the conveying device.

[0097] Optional, refer to Figure 1 The direction X of the conveying line is parallel to the direction of gravity.

[0098] In this embodiment, the preferred implementation is to set the conveying line parallel to the direction of gravity. In this way, the separation devices can be arranged sequentially along the direction of gravity. On the one hand, the active material layer 42 peeled off from the electrode 4 will automatically fall off under the action of gravity and fall to the bottom of the housing 1 for easy collection and processing. On the other hand, the direction X of the conveying line is parallel to the direction of gravity, which makes it easy to position the separation devices on the conveying line.

[0099] It should be noted that when the direction X of the conveying line is parallel to the direction of gravity, the method of removing the current collector layer 41 from the electrode 4 processing device should be considered. For example, a switch door with a size matching the current collector layer 41 can be opened on the side of the housing 1 near the bottom of the housing 1. While the electrode 4 is still being processed by the separation device, the switch door can be closed to prevent the detached active material layer 42 from splashing out of the housing 1. After the electrode 4 has passed through all the separation devices, the current collector layer 41 falls into the bottom of the housing 1. The complete current collector layer 41 can be removed by opening the switch door.

[0100] Optional, in conjunction with reference Figure 1 , Figure 2 , Figure 9 and Figure 10 ,in Figure 9 This is an embodiment of the present application. Figure 1 A side view of the screening device 5 in the diagram. Figure 10 yes Figure 9A top view of the structure of the screen 51; the equipment also includes: a screening device 5; the screening device 5 is used to collect the active material layer 42; the screening device 5 includes: a screen 51, a third drive component 52, and a collection container 53; the screen 51 is electrically connected to the third drive component 52; the screening device 5 is fixedly installed inside the housing 1 through the collection container 53; a collection outlet 531 is provided on one side of the collection container 53, and an opening 532 is provided on the other side of the collection container 53, the opening 532 facing the separation device; the screen 51 is fixedly installed between the collection outlet 531 and the opening 532; the collection container 53 is provided with a collection slope 533 inside, the collection slope 533 is located on the side of the screen 51 facing the collection outlet 531; the higher end of the collection slope 533 is connected to one end of the screen 51, and the lower end of the collection slope 533 is connected to the collection outlet 531.

[0101] In the electrode processing equipment provided in this application embodiment, a sieving device 5 can be added to separate the current collector layer 41 and the active material layer 42. Specifically, the sieving device 5 includes a collection container 53 for collecting the broken active material layer 42, a screen 51 for separating the current collector layer 41 and the active material layer 42, and a third driving member 52 for driving the screen 51. The collection container 53 is located at the bottom of the cavity of the housing 1 and has an opening 532 facing the separation device for collecting the active material layer 42 that falls from the separation device. The bottom of the collection container 53 is provided with a collection outlet 531, which leads to the outside of the housing 1, so that the fragments or particles of the active material layer 42 that fall into the collection container 53 can be removed from the electrode processing equipment.

[0102] A screen 51 is provided between the opening 532 and the collection outlet 531 to block the current collector layer 41 and allow fragments or particles of the active material layer 42 to pass through, thereby separating the current collector layer 41 and the active material layer 42. (Refer to...) Figure 10 , Figure 10 This is an embodiment of the present application. Figure 9 A top view of the structure of the screen 51; the screen 51 is provided with multiple through holes 511 at intervals, the diameter of the through holes 511 is smaller than the size of the current collector, so as to prevent the current collector layer 41 from passing through; at the same time, the screen 51 is electrically connected to the third driving component 52, so that the screen 51 can shake and vibrate when working, to avoid the fragments of the active material layer 42 blocking the through holes, thereby maximizing the passage of the active material layer 42 through the screen 51.

[0103] A collection slope 533 is provided between the screen 51 and the collection outlet 531. The higher end of the collection slope is connected to one end of the screen 51, and the lower end of the collection slope 533 is connected to the collection outlet 531. This allows the fragments or particles of the active material layer 42 that pass through the screen 51 to roll down to the collection outlet 531 for collection.

[0104] Optional, the electrode processing equipment includes a feed inlet ( Figure 1 , Figure 2 and Figure 4 (not shown in the drawing) and discharge port ( Figure 1 , Figure 2 and Figure 4 (Not shown in the diagram); the conveying line points from the inlet to the outlet; the screening device 5 is also used to change the direction of movement of the current collector layer 41 in the conveying line so that the current collector layer 41 is moved out of the electrode processing equipment through the outlet; the size of the inlet is larger than the cross-sectional size of the electrode 4; the size of the outlet is larger than the cross-sectional size of the current collector layer 41.

[0105] Considering the ductility of metal, the current collector layer 41 can be bent in the conveying line to change its direction of movement. For this purpose, a discharge port can be provided on the housing 1 near the screen 51 of the screening device 5. The size of the discharge port matches the size of the electrode 4, and the distance between the screening device 5 and the fourth conveying roller 214 is less than the length of the current collector. When the current collector layer 41 comes into contact with the screening device 5, it bends due to the push of the fourth conveying roller 214 and changes its direction of movement. By setting a corresponding guide rail, the current collector layer 41 can be moved out of the discharge port of the screening device 5, which facilitates the separate collection of the current collector layer 41 and the active material layer 42.

[0106] In summary, in this embodiment, the electrode processing equipment includes a housing 1, a conveying mechanism 2, and a separation device 3. The separation device 3 sequentially includes a first heating device 31, a vibration device 32, and a second heating device 33, which are arranged at intervals along the conveying line of the conveying mechanism 2. Thus, the electrode 4 can be fed into the conveying mechanism 2, and the electrode 4 can pass through each separation device in sequence: the first heat collection device can remove the adhesive between the active material layer 42 and the current collector layer 41; the vibration device 32 can break the active material layer 42 on the surface of the electrode 4, causing the active material layer 42 to fall off from the current collector layer 41; the second heating device 33 can remove the residual active material layer 42 on the current collector; in addition, the air supply device 34 can prevent the active material layer 42 from blocking the conveying mechanism 2; and the screening device 5 can realize the separation and recycling of the active material layer 42 and the current collector layer 41. The electrode processing equipment provided in this application embodiment can peel off the active material layer 42 from the electrode 4, so that the active material layer 42 located on the outside of the electrode 4 is separated from the electrode 4, while retaining the current collector on the inside of the electrode 4. Compared with related technologies, the electrode processing equipment provided in this application embodiment does not require physical crushing of the current collector. Without damaging the structural integrity of the current collector, it achieves the separation of the active material and the current collector in the electrode 4, ensuring the recycling value of the current collector in the electrode 4.

[0107] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0108] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pole piece processing apparatus, characterized by, The device includes: a housing, and a conveying mechanism and a separation device disposed within the housing; The separation devices are arranged at fixed intervals along the direction of the conveying line of the conveying mechanism; Under the action of the conveying mechanism, the entire electrode sheet passes through the separation device in sequence to separate the current collector layer and the active material layer in the electrode sheet.

2. The electrode processing equipment according to claim 1, characterized in that, The separation device, along the direction of the conveying line, includes, in sequence: a first heating device, a vibration device, and a second heating device; The first heating device is used to heat the electrode to remove the binder between the current collector layer and the active material layer; The vibration device is used to cause the electrode to vibrate, thereby causing the active material to break apart layer by layer. The second heating device is used to generate and deliver a high-temperature, high-pressure airflow to the surface of the electrode to scrape off the residual active material layers on the current collector layer.

3. The pole piece processing apparatus of claim 1, wherein The conveying mechanism includes: multiple sets of conveying rollers arranged symmetrically along the direction of the conveying line; The separation device and the multiple sets of conveying rollers are arranged alternately at intervals; The side of the conveying roller is provided with a driving mechanism. Under the action of the driving mechanism, two conveying rollers in each group of conveying rollers rotate towards each other to push the electrode sheet to move along the direction of the conveying line.

4. The pole piece processing apparatus according to claim 3, characterized by, The drive mechanism includes a first drive component, a sprocket and chain mechanism, and a first transmission component; The transmission component is coaxially arranged with the conveying roller, and the two first transmission components corresponding to each group of conveying rollers rotate in opposite directions; The sprocket and chain mechanism includes a first sprocket and a plurality of second sprockets; the second sprockets are coaxially arranged with a conveying roller disposed on the same side of the conveying line; the second sprockets are connected to the output end of the first drive member.

5. The pole piece processing apparatus of claim 2, wherein The first heating device includes multiple eddy current heating coils; The plurality of eddy current heating coils are arranged side by side at intervals to form a heating array, and the heating array faces the conveying line.

6. The pole piece processing apparatus of claim 2, wherein The vibration device includes: a support frame, a second drive component, and multiple vibrators; The bracket is fixedly connected to the housing; the second driving component is fixedly connected to the bracket; Multiple vibrators are fixedly connected to the bracket at parallel intervals along a direction perpendicular to the conveying line; the working part of each vibrator is aligned with the conveying line; the output end of the second drive member is simultaneously connected to the drive parts of the multiple vibrators.

7. The pole piece processing apparatus of claim 6, wherein The drive unit of the vibrator includes: an eccentric wheel push rod mechanism, a second transmission component, and a fixed column; The drive unit is fixedly connected to the bracket via the fixed column; the eccentric wheel in the eccentric wheel push rod mechanism is rotatably connected to the fixed column, and the eccentric wheel is connected to the output end of the second drive unit via the second transmission component; one end of the push rod of the eccentric wheel push rod mechanism is connected to the eccentric shaft of the eccentric wheel. The working part of the vibrator includes: a limiting sleeve and a vibrating block; The output end is fixedly connected to the bracket by a limiting sleeve; the limiting sleeve is sleeved on the vibrating block, one end of the vibrating block is connected to the other end of the push rod, and the other end of the vibrating block is aligned with the conveying line; under the action of the second driving member, the vibrating block reciprocates linearly relative to the limiting sleeve.

8. The pole piece processing apparatus of claim 2, wherein The second heating device includes: a first fan, a first air supply duct connected to the first fan, and a heater; The first fan is used to deliver airflow to the first air supply duct; The first air supply duct passes through the heater; the first air supply duct includes a plurality of first air outlets, which are arranged parallel to each other at a distance from the first air supply duct at one end away from the first fan in a direction perpendicular to the conveying line; the first air outlets are aligned with the conveying line; the end of the first air outlet is a flat opening.

9. The pole piece processing apparatus of claim 1, wherein The separation device further includes an air supply device; the air supply device includes a second fan and a second air supply duct connected to the second fan; The second fan is used to deliver airflow to the second air supply duct; The second air outlet of the second air supply duct is aligned with at least part of the conveying mechanism from one side of the housing, and a gap is left between the inner wall of the opposite side of the housing and the conveying mechanism.

10. The pole piece processing apparatus of claim 1, wherein The direction of the conveying line is parallel to the direction of gravity.

11. The electrode processing equipment according to claim 1, characterized in that, The equipment also includes: a screening device; The sieving device is used to collect the active material layers; The screening device includes: a screen, a second driving component, and a collection container; The screen is electrically connected to the second driving component; The screening device is fixedly installed inside the housing via the collection container; one side of the collection container is provided with a collection outlet, and the other side of the collection container is provided with an opening facing the separation device; The screen is fixedly disposed between the collection outlet and the opening; a collection slope is provided inside the collection container, and the collection slope is disposed on the side of the screen facing the collection outlet; the higher end of the collection slope is connected to one end of the screen, and the lower end of the collection slope is connected to the collection outlet.

12. The pole piece processing apparatus of claim 11, wherein, The electrode processing equipment includes an inlet and an outlet; The conveying line extends from the inlet to the outlet; the screening device is also used to change the direction of movement of the current collector layer in the conveying line, so that the current collector layer is removed from the electrode processing equipment through the outlet; the size of the inlet is larger than the cross-sectional size of the electrode. The size of the discharge port is larger than the cross-sectional size of the current collector layer.

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