A high-efficiency water stripping device for lithium battery pole pieces

Abstract

The present invention discloses a high-efficiency water stripping device for lithium battery pole pieces, comprising a bracket, a stripping water tank, a driving device, a conveying device, a flushing device, and a main controller; a sandwich layer formed between an upper grid conveyor belt and a lower grid conveyor belt fixes and determines a path for transmitting the battery pole pieces, thereby avoiding damage to the battery pole pieces; on the battery pole pieces after pretreatment, the adhesion between the black powder and the pole pieces is reduced, an upper high-pressure nozzle and a lower high-pressure nozzle respectively flush the black powder on the top and bottom surfaces of the pole pieces, and multiple-frequency pulse high-pressure water flushes the pole pieces, which causes less damage to the battery pole pieces and avoids possible black powder inclusions that may occur when the pole pieces are damaged; at the same time, the flushing rate is fast and relatively clean, and there are fewer metal debris included in the black powder, thereby improving the stripping efficiency of the black powder on the pole pieces and obtaining relatively pure black powder; the device structure is relatively simple and easy to assemble and use.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery recycling, and in particular to a lithium battery pole piece high-efficiency water stripping device. Background Art

[0002] Lithium-ion batteries are secondary batteries (rechargeable batteries) that primarily rely on the movement of lithium ions between a positive electrode and a negative electrode. They consist of a positive electrode, a negative electrode, a separator, an electrolyte, and a casing. In industry, manufacturers primarily use lithium cobalt oxide, lithium manganese oxide, nickel cobalt lithium manganese oxide, and lithium iron phosphate as positive electrode materials for lithium-ion batteries, with natural and artificial graphite as negative electrode active materials. Polyvinylidene fluoride (PVDF) is a widely used positive electrode binder with high viscosity and excellent chemical stability and physical properties. Industrially produced lithium-ion batteries primarily use a solution of lithium hexafluorophosphate (LiPF6) and an organic solvent as the electrolyte, and utilize organic membranes, such as porous polymers like polyethylene (PE) and polypropylene (PP), as the separator. While lithium-ion batteries are generally considered environmentally friendly and pollution-free, improper recycling of lithium-ion batteries can also cause pollution. Although lithium-ion batteries do not contain toxic heavy metals such as mercury, cadmium, and lead, the battery's positive and negative electrode materials, electrolyte, etc. still have a significant impact on the environment and human body.

[0003] If lithium-ion batteries are disposed of using conventional methods (landfill, incineration, composting, etc.), the cobalt, nickel, lithium, manganese, and other metals, as well as various organic and inorganic compounds, contained in the batteries will cause metal pollution, organic pollution, dust pollution, and acid-base pollution. Lithium-ion electrolyte mechanical conversion products, such as LiPF6, lithium hexafluoroarsenate (LiAsF6), lithium trifluoromethanesulfonate (LiCF3SO3), and hydrofluoric acid (HF), as well as solvents and hydrolysis products such as ethylene glycol dimethyl ether (DME), methanol, and formic acid, are all toxic. Therefore, used lithium-ion batteries need to be recycled to reduce harm to the natural environment and human health.

[0004] The conventional recycling method for waste lithium batteries often uses coarse crushing. The pulverizer discharge undergoes calcination to deactivate the binder in the black powder. The discharge end is connected to a swing screen, and the outlet is connected to two dust removal devices. The middle outlet of the swing screen is connected to a grinder, and the grinder discharge port is connected to a grinding aggregate. The top powder outlet of the grinding aggregate is connected to three dust removal devices, and the bottom opening of the grinding aggregate is connected to a vibrating screen. The swing screen has three discharge ports: the top discharge port is used to screen out large copper and aluminum particles, the bottom discharge port is used to screen out black powder, and the middle discharge port is used to screen out materials that cannot be separated by specific gravity.

[0005] The black powder obtained through crude crushing and screening contains a large amount of extremely small metal debris. Subsequent black powder utilization contains a large amount of impurities, which greatly reduces the black powder's value. Due to the ductile nature of the collector metal, the crushing process is prone to black powder entrainment, resulting in over 20% black powder loss. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to provide a high-efficiency water stripping device for lithium battery pole pieces, so as to solve the problem that impurities exist in the black powder caused by the crude crushing and screening methods used in the prior art, and at the same time, the crude crushing causes the current collector to easily form black powder entrainment during the crushing process, resulting in black powder loss.

[0007] A high-efficiency water stripping device for lithium battery pole pieces, comprising a bracket, a stripping water tank, a driving device, a conveying device, a flushing device, and a main controller;

[0008] The bracket is placed horizontally, and a stripping water tank is provided at one end of the top surface; the stripping water tank includes a stripping water trough and an upper box body; an opening is provided at the top of the stripping water trough, and the upper box body is installed at the opening, and a feed port is provided at one end of the upper box body, and a discharge port is formed at the other end and the top of the stripping water trough;

[0009] The conveying device includes a roller shaft, an upper grid conveyor belt, and a lower grid conveyor belt; the roller shaft is arranged horizontally, and its two ends are rotatably connected to the stripping trough or the upper box; the upper grid conveyor belt is installed on the upper box via the roller shaft, and a belt-roller transmission is formed between the roller shaft and the lower grid conveyor belt; a sandwich is formed between the bottom surface of the upper grid conveyor belt and the lower grid conveyor belt for fixing and conveying pre-treated battery electrodes; the size of the grids on the upper grid conveyor belt and the lower grid conveyor belt can prevent the battery electrodes from falling through the grids;

[0010] The driving device is installed on one side of the stripping water tank, which is used to drive the roller to rotate, thereby driving the upper grid conveyor belt and the lower grid conveyor belt to move;

[0011] The flushing device includes a high-pressure pump, a pulse generator, an upper connecting pipe, an upper high-pressure nozzle, a lower connecting pipe, a lower high-pressure nozzle and an automatic cleaning filter; the stripping water tank is connected to a pipe on one side, and an upper high-pressure pipe and a lower high-pressure pipe are provided on the other end of the pipe, the upper high-pressure pipe passes through a side wall of the stripping water tank and is communicated with the longitudinally arranged upper connecting pipe, one side of the upper connecting pipe is rotatably connected to several upper high-pressure nozzles, the lower high-pressure pipe passes through a side of the stripping water tank and is communicated with the longitudinally arranged lower connecting pipe, and one side of the lower connecting pipe is rotatably connected to the lower high-pressure nozzle; the upper high-pressure nozzle and the lower high-pressure nozzle are used to flush the black powder on the upper side of the battery pole piece and the black powder on the lower side of the battery pole piece; a high-pressure pump and a pulse generator are installed on the pipe; the bottom end of the high-pressure pump is fixedly connected to the bracket; the high-pressure pump is used to control the water pressure of the upper and lower high-pressure nozzles; the pulse generator is used to control the pulses of the upper and lower high-pressure nozzles; the automatic cleaning filter is connected to the pipe, the bottom is fixedly connected to the bracket, and a black powder outlet is provided at the bottom of the automatic cleaning filter;

[0012] The main controller is installed on one side of the stripping water tank and is electrically connected to the driving device, high-pressure pump, pulse generator and automatic cleaning filter;

[0013] The lower grid conveyor belt drives the battery electrodes put into the feed port, and forms a sandwich with the upper grid conveyor belt to fix the battery electrodes. The upper high-pressure nozzle and the lower high-pressure nozzle flush the black powder on the surface of the battery electrodes; the electrodes after flushing are discharged from the discharge port, and the black powder enters the stripping tank with the sprayed water, is transported to the automatic cleaning filter through a pipeline, and is discharged from the black powder outlet.

[0014] Furthermore, the feed port is rectangular, and a door panel is provided at the feed port. One side of the door panel is rotatably connected to one side of the feed port, and the other side of the door panel is provided with a sliding switch for controlling whether the feed port is closed.

[0015] Furthermore, the driving device includes a driving motor, a gear and a gear box;

[0016] A step is provided on one side of the top of the peeling water tank; a gear box is fixedly provided on the top surface of the step, a drive motor is fixed on the gear box, an output shaft passes through a side wall of the gear box and is fixedly connected to a gear; another gear is rotatably connected to the gear box, and the two gears are gear-driven; the two gears are respectively fixedly connected to the end of the roller arranged at the end of the upper grid conveyor belt or the lower grid conveyor belt away from the feed port;

[0017] The driving motor is electrically connected to the main controller and is used to drive the gear to rotate.

[0018] Furthermore, a drain valve is provided at the bottom of the stripping water tank.

[0019] Furthermore, the number of the upper high-pressure nozzles and the lower high-pressure nozzles is the same, and they are offset from top to bottom to avoid imbalance in the position of the battery pole pieces during the flushing process.

[0020] Furthermore, the main controller is a PLC control cabinet, the main controller is installed on the step, and an integrated touch screen is provided on a side of the main controller away from the upper box.

[0021] Furthermore, it also includes a porous plate isolation cover and an isolation cover; the isolation cover is fixedly connected to the upper box body; the top of the isolation cover is rotatably connected to a horizontally arranged roller, which is connected to the upper grid conveyor belt; the bottom of the isolation cover is provided with an opening, which can cover the top surface of the interlayer; the porous plate isolation cover is fixedly connected to the stripping water tank; the bottom of the porous plate isolation cover is rotatably connected to a horizontally arranged roller, which is connected to the lower grid conveyor belt; the top of the porous plate isolation cover is provided with an opening, which can cover the bottom surface of the interlayer;

[0022] One end of the upper high-pressure pipeline passes through the isolation cover and is connected to the upper connecting pipe arranged inside the isolation cover; one end of the lower high-pressure pipeline passes through the porous plate isolation cover and is connected to the lower connecting pipe arranged inside the porous plate isolation cover.

[0023] Furthermore, it also includes a guide roller, and the porous plate isolation cover and the isolation cover are respectively rotatably connected with a transversely arranged guide roller; the guide roller in the isolation cover is connected to the top surface of the interlayer, and the guide roller in the porous plate isolation cover is connected to the bottom surface of the interlayer; the guide roller is used to make the interlayer more stable during the process of fixing and transporting the battery pole pieces.

[0024] Furthermore, it also includes a push handle and universal wheels; the push handle is vertically arranged and fixedly connected to the end of the bracket away from the stripping water tank; universal wheels are arranged at the four corners of the bottom surface of the bracket.

[0025] Beneficial effects: The present invention fixes and determines the path for transmitting battery pole pieces through the interlayer formed between the upper grid conveyor belt and the lower grid conveyor belt, thereby avoiding damage to the battery pole pieces; on the battery pole pieces after pretreatment, the adhesion between the black powder and the pole pieces is reduced, and the upper high-pressure nozzle and the lower high-pressure nozzle respectively flush the black powder on the top and bottom surfaces of the pole pieces, and the multi-frequency pulse high-pressure water flushing of the pole pieces causes less damage to the battery pole pieces, avoiding the possible inclusion of black powder due to pole piece damage, and at the same time, the flushing rate is fast and relatively clean, and there are fewer metal debris mixed in the black powder, which improves the stripping efficiency of the black powder on the pole pieces, and can obtain relatively pure black powder; the device structure is relatively simple and easy to assemble and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 A front view of an embodiment of the present invention;

[0029] Figure 3 A top view of an embodiment of the present invention;

[0030] Figure 4 It is a left side view of an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the installation of the conveying device according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Bracket; 11. Push handle; 2. Peeling water tank; 21. Peeling water trough; 211. Drain valve; 22. Upper box body; 221. Feed inlet; 2211. Door panel; 2212. Slide switch; 222. Discharge port; 3. High-pressure pump; 4. Pulse generator; 5. Automatic cleaning filter; 51. Black powder outlet; 611. Upper high-pressure pipeline; 612. Lower high-pressure pipeline; 621. Upper connecting pipe; 622. Lower connecting pipe; 631. Upper high-pressure nozzle; 632. Lower high-pressure nozzle; 64. Connector; 71. Drive motor; 72. Gear box; 8. Main controller; 81. Integrated touch screen; 91. Roller; 92. Guide roller; 101. Upper grid conveyor belt; 102. Lower grid conveyor belt; 111. Isolation cover; 112. Perforated plate isolation cover; 12. Universal wheel. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1-5 The device for efficiently water-stripping lithium battery pole pieces shown includes: a universal wheel 12, a bracket 1, a push handle 11, a stripping water tank 2, a driving device, a conveying device, a flushing device and a main controller 8.

[0039] The bracket 1 is arranged horizontally, with universal wheels 12 at the four corners of the bottom. One end of the top surface is fixedly connected to the longitudinally arranged stripping water tank 2, and the other end is fixedly connected to the longitudinally arranged push handle 11 fixedly connected to the bracket 1. The push handle 11 is arranged vertically, and the top is used to hold and push or pull the bracket 1 to move.

[0040] In this embodiment, the arrangement of the universal wheels 12 and the push handle 11 makes the device movable, and facilitates transporting the device to a site for use or to a warehouse for storage.

[0041] The stripping water tank 2 includes a stripping water trough 21 and an upper box body 22; the bottom surface of the stripping water trough 21 is fixedly connected to the bracket 1, and two drain valves 211 are symmetrically arranged on the same side of the bottom, the left side of the stripping water trough 21 is provided with a step, and the top is provided with an upward opening; the upper box body 22 is rectangular, longitudinally arranged at the top of the stripping water trough 21, and the bottom is provided with another opening with a size and shape that is adapted to the top opening of the stripping trough 21; a feed port 221 is provided at one end of the upper box body 22, and the feed port 221 is rectangular, and a door panel 2211 is provided at the feed port 221, and one side of the door panel 2211 is rotatably connected to one side of the feed port 221, and the other side of the door panel 2211 is provided with a sliding switch 2212 for controlling whether the feed port 221 is closed; a discharge port 222 arranged obliquely downward is formed between the bottom edge part of the other end of the upper box body 22 and the top of the stripping water trough 21.

[0042] In this embodiment, the structure of the stripping water tank 2 is simple and easy to assemble and use. The size of the feed port 221 is convenient for inserting battery electrodes. The door panel 2211 and the sliding switch 2212 are arranged to facilitate closing and opening the feed port 221. Closing the feed port after inserting the battery electrodes can prevent external dust and other impurities from entering the stripping water tank 2, thereby reducing the purity of the black powder. Preferably, the size of the discharge port 222 is designed to be relatively small, which can also reduce the problem of external impurities interfering with the purity of the black powder.

[0043] The conveying device includes rollers 91, an upper grid conveyor belt 101, and a lower grid conveyor belt 102. The rollers 91 are arranged horizontally inside the upper box 22 and the stripping water tank 21, with their ends rotatably connected to the upper box 22 or the stripping water tank 21. There are two rollers 91 connected to the upper box 22 and two rollers 91 connected to the stripping water tank 21, and they are arranged horizontally. The upper grid conveyor belt 101 is installed inside the upper box 22, forming a belt-roller transmission with the rollers 91. The lower grid conveyor belt 102 is installed inside the stripping water tank 21, forming a belt-roller transmission with the rollers 91. The conveyor belt at the bottom of the upper grid conveyor belt 101 is set at the bottom opening of the upper box 22; the conveyor belt at the top of the lower grid conveyor belt 102 is set at the top opening of the stripping water tank 2. The conveyor belt at the bottom of the upper grid conveyor belt 101 and the conveyor belt at the top of the lower grid conveyor belt 102 are arranged parallel to each other, used to form a sandwich layer that fixes and drives the battery electrodes. The horizontal distance between the top conveyor belt of the lower grid conveyor belt 102 and the feed port 221 is smaller than the distance between the bottom conveyor belt of the upper grid conveyor belt 101 and the feed port 221, so that the lower grid conveyor belt 102 forms a discharge area at the feed port 221, which is used for the battery electrodes to be put into the interlayer by the lower grid conveyor belt 102 after the battery electrodes are put into the feed port 221.

[0044] In this embodiment, the conveyor is configured to fix and maintain the trajectory of the battery electrode sheets. The mesh size of the upper mesh conveyor belt 101 and the lower mesh conveyor belt 102 should be smaller than the size of the battery electrode sheets to prevent the battery electrode sheets from passing through the mesh and falling into the stripping tank 21. Preferably, the mesh size is 10*10 mm, and the upper mesh conveyor belt 101 and the lower mesh conveyor belt 102 are made of nylon.

[0045] The driving device includes a driving motor 71, a gear box 72 and a gear; the gear box 72 is arranged longitudinally and is vertically fixed on the top surface of the step of the stripping water tank 2; the left side of the gear box 72 is fixedly connected to the driving motor 71; the output shaft of the driving motor 71 passes through the left side wall of the gear box 72 and is fixedly connected to a gear; the upper part of the gear box 72 is rotatably connected to another gear, and gear transmission is performed between the two gears; the lower gear is fixedly connected to the end of the roller 91 arranged at the end of the lower grid conveyor belt 102 away from the discharge port 222, and the upper gear is fixedly connected to the end of the roller 91 arranged at the end of the upper grid conveyor belt 101 away from the discharge port 222.

[0046] In this embodiment, the gears and the drive motor 71 are configured to cause the upper grid conveyor belt 101 and the lower grid conveyor belt 102 to move relative to each other, so that the positions of the battery electrodes in the interlayer are relatively stationary, and no friction occurs between the battery electrodes or between the battery electrodes and the upper grid conveyor belt 101 or the lower grid conveyor belt 102, thereby preventing the generation of metal powder that reduces the purity of the black powder or the battery electrodes from being broken and causing the inclusion of black powder. Preferably, both sides of the upper grid conveyor belt 101 and the lower grid conveyor belt 102 should be provided with an outer edge that is thicker than the thickness of the middle portion of the upper grid conveyor belt 101 or the lower grid conveyor belt 102, and the outer edge of the upper grid conveyor belt 101 and the outer edge of the lower grid conveyor belt 102 abut against each other during the movement of the upper grid conveyor belt 101 and the lower grid conveyor belt 102, thereby further preventing the battery electrodes from falling into the stripping tank 21. At the same time, the outer edge of the lower grid conveyor belt 102 can also serve to gather the battery electrodes.

[0047] The flushing device includes a high-pressure pump 3, a pulse generator 4, an upper connecting pipe 621, a lower high-pressure nozzle 632, a lower connecting pipe 622, a lower high-pressure nozzle and an automatic cleaning filter 5; a drain valve 211 at the bottom of the stripping water tank 2 is connected to the high-pressure pump 3, the pulse generator 4 and the automatic cleaning filter 5 in sequence through a joint 64, and forms a pipeline for liquid flow; the end of the pipeline away from the drain valve 211 is connected to the upper high-pressure pipeline 611 and the lower high-pressure pipeline 612; one end of the upper high-pressure pipeline 611 passes horizontally through the left side wall of the upper box body 22 and is connected to the upper connecting pipe 621 arranged longitudinally in the upper triangular area Fixed connection, a plurality of upper high-pressure nozzles 631 are provided on the side of the upper connecting pipe 621 away from the upper high-pressure pipeline 611; one end of the lower high-pressure pipeline 612 passes horizontally through the left side wall of the stripping water tank 21, and is connected to the lower connecting pipe 622 longitudinally arranged in the lower triangular area, and a plurality of lower high-pressure nozzles are provided on the side of the lower connecting pipe 622 away from the lower high-pressure pipeline 612; the number of the lower high-pressure nozzles 632 and the upper high-pressure nozzles 631 are the same, and the positions are offset, which is used to avoid the imbalance of the battery pole position during the process of flushing the battery pole, and the black powder on the battery pole is not washed cleanly, which reduces the flushing efficiency and causes the loss of black powder. The high-pressure pump 3 is used to control the pressure of the water in the control pipeline so that the water sprayed from the lower high-pressure nozzle 632 and the upper high-pressure nozzle 631 have the same and continuous pressure; the pulse generator 4 is used to control the pulse of the water sprayed from the lower high-pressure nozzle 632 and the upper high-pressure nozzle 632, so that the sprayed water has more impact and the flushing effect is better; the automatic cleaning filter 5 is used to filter black powder, and a black powder outlet 51 is provided at the bottom of the automatic cleaning filter 5.

[0048] In this embodiment, the high-pressure pump 3 and the pulse generator 4 are used to control the pressure and impact of the water in the pipeline, so that the water in the pipeline can move upward to the automatic cleaning filter 5 and then move to the upper high-pressure pipeline 611 and the lower high-pressure pipeline 612, and then be sprayed out from the upper high-pressure nozzle 631 and the lower high-pressure nozzle 632. The upper high-pressure nozzle 631 and the upper connecting pipe 621 are rotatably connected to facilitate adjustment of the angle of the water spray to achieve a better flushing effect; the lower high-pressure nozzle 632 and the lower connecting pipe 622 are rotatably connected to facilitate adjustment of the angle of the water spray to achieve a better flushing effect. The pulse and pressure range can also be adjusted by the high-pressure pump 3 and the pulse generator 4 to achieve a better flushing effect. Preferably, the pulse pressure is 0-15 bar, and the frequency range is between 20-30 Hz.

[0049] It also includes a porous plate isolation cover 112 and an isolation cover 111 for improving the flushing effect. The isolation cover 111 is installed in the upper box body 22, and the isolation cover 111 is fixedly connected to the left and right side walls of the upper box body 22; the top of the isolation cover 111 is rotatably connected to a horizontally arranged roller 91, which is used to form an upper triangular area in the middle of the upper grid conveyor belt 101 to avoid friction between the isolation cover 111 and the upper grid conveyor belt 101, making it easier to install the isolation cover 111; the bottom of the isolation cover 111 is provided with an opening that can cover part of the upper grid conveyor belt 101 at the top of the interlayer; the porous plate isolation cover 112 is installed in the stripping tank 21, and the porous plate isolation cover 112 is connected to the stripping tank 21. The left and right side walls are fixedly connected; the bottom of the porous plate isolation cover 112 is rotatably connected to a horizontally arranged roller 91, which is used to form a lower triangular area in the middle of the lower grid conveyor belt 102, preventing friction between the lower grid conveyor belt 102 and the porous plate isolation cover 112, and facilitating the installation of the porous plate isolation cover 112; an opening is provided on the upper side of the porous plate isolation cover 112; the openings on the isolation cover 111 and the porous plate isolation cover 112 are of the same shape and size, positioned opposite each other, and fixedly connected. The middle of the isolation cover 111 and the middle of the porous plate isolation cover 112 form the core area for stripping black powder. The left side of the porous plate isolation cover 112 and the left side of the isolation cover 111 are both provided with holes for the lower high-pressure pipeline 612 or the upper high-pressure pipeline 611 to pass through and connect to the lower connecting pipe 622 disposed in the porous plate isolation cover 112 or the upper connecting pipe 621 disposed in the isolation cover 111.

[0050] In this embodiment, the porous plate isolation cover 112 and the interior of the isolation cover 111 form the core area where the lower high-pressure nozzle 632 and the upper high-pressure nozzle 631 spray water to remove the black powder on the battery electrode. Spraying water to remove the black powder in the core area can prevent the electrode from detaching. The isolation cover 111 can prevent water from splashing out, while the water reflected from the top can continue to rinse the battery electrode. The porous plate isolation cover 112 prevents water from splashing out while facilitating the discharge of the rinse water. Preferably, the side of the upper box 22 away from the drive motor 71 can be opened and closed to facilitate maintenance of the conveyor device, isolation cover 111, and porous plate isolation cover 112.

[0051] The conveying device also includes a guide roller 92; the guide roller 92 is arranged horizontally and is rotatably connected to the left and right side walls of the porous plate isolation cover 112 or the left and right side walls of the isolation cover 111, and is used to guide the lower grid conveyor belt 102 and the upper grid conveyor belt 101; at the same time, the number and position of the guide rollers 92 in the isolation cover 111 and the porous plate isolation cover 112 correspond, so that the conveyor belt at the bottom of the upper grid conveyor belt 101 and the conveyor belt at the top of the lower grid conveyor belt 102 are divided into several parts, and the interlayer is also divided into several parts accordingly, which in disguise reduces the distance between the two ends of the interlayer, making the interlayer more stable in the process of fixing and transporting the battery electrodes, and reducing the possibility of relative displacement between the battery electrodes due to gravity, the interlayer fixing or the transportation of the battery electrodes being unreliable, or the interlayer gap in the middle part being too small, thereby generating metal powder by friction.

[0052] In this embodiment, the guide roller 92 can guide and protect the battery pole pieces, which is beneficial to further improve the purity of the black powder. At the same time, the guide roller 92 can also make the process of fixing and conveying the battery pole pieces more stable.

[0053] The main controller 8 is a PLC control cabinet, which is fixedly mounted on the step of the peeling tank 21 and has an integrated touch screen 81 on its left side. The main controller 8 is electrically connected to the drive motor 71, high-pressure pump 3, pulse generator 4, and automatic cleaning filter 5, and is controlled via the integrated touch screen 81.

[0054] In this embodiment, the integrated touch screen 81 has a simple structure and is easy to operate, and can better control the operation of the device.

[0055] Working principle: Push the device to a suitable site through the push handle 11, adjust the angle of the lower high-pressure nozzle 632 and the upper high-pressure nozzle 631, open the feed port 221 through the sliding switch 2212, and put the pre-treated battery pole pieces from the feed port 221; put the battery pole pieces onto the top surface of the lower grid conveyor belt 102; control the driving device, high-pressure pump 3, pulse generator 4 and automatic cleaning filter 5 to start through the main controller 8, and adjust the pressure that the high-pressure pump 3 can provide and the pulse frequency of the pulse generator 4 according to the flushing needs; the lower grid transmission belt drives the battery pole pieces to move and enter the interlayer; as the interlayer moves, the battery pole pieces The upper and lower sides of the sheet are rinsed by the lower high-pressure nozzle 632 and the upper high-pressure nozzle 631, and the black powder is separated from the battery electrode and mixed with water to form a mixed liquid. The rinsed battery electrode is discharged from the discharge port 222; the mixed liquid flows from the porous plate isolation cover 112 into the stripping water tank 21, and then flows into the pipeline; under the action of the high-pressure pump 3 and the pulse generator 4, the mixed liquid in the pipeline is pressurized and flows into the self-cleaning filter; the self-cleaning filter separates the water and the black powder, and the black powder is discharged from the black powder outlet 51, and the water flows from the upper high-pressure pipeline 611 to the upper high-pressure nozzle 631 or from the lower high-pressure pipeline 612 to the lower high-pressure nozzle 632, and then is recycled.

[0056] In this embodiment, the interlayer formed between the upper grid conveyor belt 101 and the lower grid conveyor belt 102 fixes and determines the transmission track of the battery pole piece, thereby avoiding damage to the battery pole piece; on the battery pole piece after pretreatment, the adhesion between the black powder and the pole piece is reduced, and the upper high-pressure nozzle 631 and the lower high-pressure nozzle 632 respectively flush the black powder on the top and bottom surfaces of the pole piece, and the multi-frequency pulse high-pressure water flushing of the pole piece causes less damage to the battery pole piece, thereby avoiding the possible entrainment of black powder caused by damage and bending of the battery pole piece; at the same time, the flushing rate is fast and relatively clean, and there are fewer metal debris mixed in the black powder, which improves the stripping efficiency of the black powder on the pole piece, and relatively pure black powder can be obtained; the device structure is relatively simple, and it is easy to assemble and use.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A lithium battery pole piece high efficiency water stripping device, characterized in that: It includes a bracket (1), a stripping water tank (2), a driving device, a conveying device, a flushing device, and a main controller (8); The bracket (1) is placed horizontally, and a stripping water tank (2) is provided at one end of the top surface; the stripping water tank (2) includes a stripping water trough (21) and an upper box body (22); an opening is provided at the top of the stripping water trough (21), and the upper box body (22) is installed at the opening; a feed port (221) is provided at one end of the upper box body (22), and a discharge port (222) is formed at the other end together with the top end of the stripping water trough (21); The conveying device includes a roller (91), an upper grid conveyor belt (101) and a lower grid conveyor belt (102); the roller (91) is arranged horizontally, and its two ends are rotatably connected to the stripping water trough (21) or the upper box (22); the upper grid conveyor belt (101) is installed on the upper box (22) through the roller (91), and a belt-roll transmission is formed between the upper grid conveyor belt (101) and the roller (91); the lower grid conveyor belt (102) is installed on the stripping water trough (21) through the roller (91), and a belt-roll transmission is formed between the lower grid conveyor belt (102); an interlayer is formed between the bottom surface of the upper grid conveyor belt (101) and the lower grid conveyor belt (102), which is used to fix and convey the pre-treated battery pole pieces; the size of the grids on the upper grid conveyor belt (101) and the lower grid conveyor belt (102) can prevent the battery pole pieces from falling from the grids; The driving device is installed on one side of the stripping water tank (2) and is used to drive the roller (91) to rotate, thereby driving the upper grid conveyor belt (101) and the lower grid conveyor belt (102) to move; The flushing device comprises a high-pressure pump (3), a pulse generator (4), an upper connecting pipe (621), an upper high-pressure nozzle (631), a lower connecting pipe (622), a lower high-pressure nozzle (632) and an automatic cleaning filter (5); a side of the stripping water tank (21) is connected to a pipeline, and the other end of the pipeline is provided with an upper high-pressure pipeline (611) and a lower high-pressure pipeline (612), the upper high-pressure pipeline (611) passes through a side wall of the stripping water tank (2) and is communicated with the longitudinally arranged upper connecting pipe (621), one side of the upper connecting pipe (621) is rotatably connected to a plurality of upper high-pressure nozzles (631), the lower high-pressure pipeline (612) passes through a side wall of the stripping water tank (2) and is communicated with the longitudinally arranged lower connecting pipe (622), the lower connecting pipe (62 2) One side is rotatably connected to a lower high-pressure nozzle (632); the upper high-pressure nozzle (631) and the lower high-pressure nozzle (632) are used to wash away the black powder on the upper side of the battery pole piece and the black powder on the lower side of the battery pole piece; a high-pressure pump (3) and a pulse generator (4) are installed on the pipeline; the bottom end of the high-pressure pump (3) is fixedly connected to the bracket (1); the high-pressure pump (3) is used to control the water pressure of the upper high-pressure nozzle (631) and the lower high-pressure nozzle (632) spraying water; the pulse generator (4) is used to control the pulse of the upper high-pressure nozzle (631) and the lower high-pressure nozzle (632) spraying water; the automatic cleaning filter (5) is connected to the pipeline, and the bottom is fixedly connected to the bracket (1), and the bottom of the automatic cleaning filter (5) is provided with a black powder outlet (51); The main controller (8) is installed on one side of the stripping water tank (2) and is electrically connected to the driving device, the high-pressure pump (3), the pulse generator (4) and the automatic cleaning filter (5); The lower grid conveyor belt (102) drives the battery pole pieces fed from the feed port (221) and forms a sandwich with the upper grid conveyor belt (101) to fix the battery pole pieces. The upper high-pressure nozzle (631) and the lower high-pressure nozzle (632) flush the black powder on the surface of the battery pole pieces. The pole pieces after flushing are discharged from the discharge port (222). The black powder enters the stripping water tank (21) along with the sprayed water, is transported to the automatic cleaning filter (5) through a pipeline, and is discharged from the black powder outlet (51). A drain valve (211) is provided at the bottom of the stripping water tank (21).

2. The lithium battery pole piece high-efficiency water stripping device according to claim 1, characterized in that: The feed port (221) is rectangular, and a door panel (2211) is provided at the feed port (221). One side of the door panel (2211) is rotatably connected to one side of the feed port (221), and the other side of the door panel (2211) is provided with a sliding switch (2212) for controlling whether the feed port (221) is closed.

3. The lithium battery pole piece high-efficiency water stripping device according to claim 1, characterized in that: The driving device includes a driving motor (71), a gear and a gear box (72); A step is provided on one side of the top of the stripping water tank (21); a gear box (72) is fixedly provided on the top of the step, a driving motor (71) is fixed on the gear box (72), an output shaft passes through a side wall of the gear box (72) and is fixedly connected to a gear; another gear is rotatably connected to the gear box (72), and the two gears are gear-driven; the two gears are respectively fixedly connected to the end of the roller (91) provided on the end of the upper grid conveyor belt (101) or the lower grid conveyor belt (102) away from the feed port (221); The driving motor (71) is electrically connected to the main controller (8) and is used to drive the gear to rotate.

4. The lithium battery pole piece high-efficiency water stripping device according to claim 1, characterized in that: The upper high-pressure nozzles (631) and the lower high-pressure nozzles (632) are provided in the same number and are arranged in a manner to offset each other, thereby preventing imbalance in the positions of the battery electrodes during the flushing process.

5. The lithium battery pole piece high-efficiency water stripping device according to claim 3, characterized in that: The main controller (8) is a PLC control cabinet. The main controller (8) is installed on the top step of the stripping water tank (21). An integrated touch screen (81) is provided on a side of the main controller (8) away from the upper box (22).

6. The lithium battery pole piece high-efficiency water stripping device according to claim 1, characterized in that: The device further comprises an isolation cover (111), wherein the isolation cover (111) is fixedly connected to the upper box body (22); a roller shaft (91) arranged transversely is rotatably connected to the top of the isolation cover (111), and the roller shaft (91) is connected to the upper grid conveyor belt (101); an opening is provided at the bottom of the isolation cover (111), capable of covering the top surface of the interlayer; one end of the upper high-pressure pipeline (611) passes through the isolation cover (111) and is connected to an upper connecting pipe (621) arranged inside the isolation cover (111).

7. The lithium battery pole piece high-efficiency water stripping device according to claim 6, characterized in that: The invention also includes a porous plate isolation cover (112), which is fixedly connected to the stripping water tank (21); the bottom of the porous plate isolation cover (112) is rotatably connected to a horizontally arranged roller (91), and the roller (91) is connected to the lower grid conveyor belt (102); the top of the porous plate isolation cover (112) is provided with an opening that can cover the bottom surface of the interlayer; one end of the lower high-pressure pipeline (612) passes through the porous plate isolation cover (112) and is connected to a lower connecting pipe (622) arranged inside the porous plate isolation cover (112).

8. The lithium battery pole piece high-efficiency water stripping device according to claim 7, characterized in that: The invention also includes a guide roller (92), wherein the porous plate isolation cover (112) and the isolation cover (111) are respectively rotatably connected to a transversely arranged guide roller (92); the guide roller (92) in the isolation cover (111) is connected to the top surface of the interlayer, and the guide roller (92) in the porous plate isolation cover (112) is connected to the bottom surface of the interlayer; the guide roller (92) is used to make the interlayer more stable during the process of fixing and transporting the battery pole piece.

9. The lithium battery pole piece high-efficiency water stripping device according to claim 1, characterized in that: It also includes a push handle (11) and universal wheels (12); the push handle (11) is arranged vertically and fixedly connected to the end of the bracket (1) away from the stripping water tank (2); the universal wheels (12) are arranged at the four corners of the bottom surface of the bracket (1).

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