A lithium battery recycling device

Abstract

The application discloses a lithium battery recycling device and relates to the technical field of lithium battery recycling. The lithium battery recycling device comprises a liquid storage tank, a net and a rotating liquid spraying mechanism. The net is arranged in the liquid storage tank. The liquid outlet end of a first liquid pump is communicated with a liquid spraying pipe. The circumferential surface of the liquid spraying pipe is provided with a liquid spraying opening. A driving motor is connected with the liquid spraying pipe. The liquid spraying pipe is arranged below the net. The driving motor is used for driving the liquid spraying pipe to rotate around the axial direction of the liquid spraying pipe. The impact liquid sprayed from the liquid spraying pipe impacts the pole piece fragments in the net and drives the pole piece fragments to move in a preset direction. The pole piece fragments are simultaneously separated into current collectors and battery materials. The preset direction is arranged perpendicularly to the axial direction of the liquid spraying pipe. The lithium battery recycling device can effectively improve the separation efficiency, shorten the soaking time, prevent the pole piece fragments from being cut, avoid the loss of battery materials and improve the battery material recovery rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery recycling, in particular to a lithium battery recycling device. BACKGROUND

[0002] At present, the lithium battery wet recovery includes the following processes: cell loading, cell discharging, cell shell removal, fine disassembly and separation of positive and negative electrode sheets, electrode sheet cutting, electrode sheet soaking, powder stripping, powder filtering and cleaning, and drying. In the process of electrode sheet soaking, the electrode sheet fragments obtained by cutting are generally placed in a stripping solution (acid solution or alkali solution), and the separation of the battery materials and the current collector in the electrode sheet fragments is realized through the chemical reaction of the electrode sheet fragments and the stripping solution. However, this separation method has a long soaking time and low separation efficiency. If a stirring paddle is used to stir the stripping solution to accelerate the separation, the rotation of the stirring paddle is likely to cut the electrode sheet fragments, causing further fragmentation of the electrode sheet fragments, resulting in loss of battery materials and reduced recovery rate of battery materials.

[0003] Therefore, it is particularly important to design and manufacture a lithium battery recycling device with high separation efficiency and high battery material recovery rate. SUMMARY

[0004] The present application aims to provide a lithium battery recycling device that can effectively improve the separation efficiency, shorten the soaking time, prevent the cutting of electrode sheet fragments, avoid the loss of battery materials, and improve the recovery rate of battery materials.

[0005] The present application is implemented by using the following technical solutions.

[0006] A lithium battery recycling device includes a liquid storage tank, a net, and a rotating liquid spraying mechanism. The net is arranged in the liquid storage tank, and the liquid storage tank is used to store a stripping solution. The net is used for feeding electrode sheet fragments. The rotating liquid spraying mechanism includes a driving motor, a liquid spraying pipe, and a first liquid pump. The outlet of the first liquid pump is connected to the liquid spraying pipe. The liquid spraying pipe has a liquid spraying port on its circumferential surface. The first liquid pump is used to draw impact liquid into the liquid spraying pipe, so that the impact liquid is sprayed from the liquid spraying port. The driving motor is connected to the liquid spraying pipe. The liquid spraying pipe is arranged below the net. The driving motor is used to drive the liquid spraying pipe to rotate around its axial direction, so that the impact liquid sprayed from the liquid spraying pipe impacts the electrode sheet fragments in the net and drives the electrode sheet fragments to move in a preset direction. At the same time, the electrode sheet fragments are separated into current collectors and battery materials. The preset direction is perpendicular to the axial direction of the liquid spraying pipe.

[0007] Optionally, the number of liquid spraying pipes is multiple. The multiple liquid spraying pipes are arranged side by side and spaced apart along the preset direction. The driving motor is connected to the multiple liquid spraying pipes to drive the multiple liquid spraying pipes to rotate synchronously.

[0008] Optionally, the number of the liquid injection ports is multiple, and the multiple liquid injection ports are arranged along the axial direction of the liquid injection pipe.

[0009] Optionally, the liquid injection pipe has a first rotation limit position and a second rotation limit position, the liquid injection pipe is configured to reach the second rotation limit position after rotating from the first rotation limit position by a first preset angle, and the liquid injection pipe is configured to reach the first rotation limit position after rotating from the second rotation limit position by the first preset angle, the first preset angle ranges from 30 degrees to 90 degrees, the first liquid pump is configured to be started when the liquid injection pipe rotates from the first rotation limit position to the second rotation limit position, and the first liquid pump is configured to be closed when the liquid injection pipe rotates from the second rotation limit position to the first rotation limit position.

[0010] Optionally, the liquid injection pipe further has an intermediate position, the liquid injection pipe is configured to reach the intermediate position after rotating from the first rotation limit position by half of the first preset angle, and the liquid injection port is configured to extend in the vertical upward direction when the liquid injection pipe rotates to the intermediate position.

[0011] Optionally, the mesh net is provided with a bottom net wall, the bottom net wall is rectangular, the length direction of the bottom net wall is the preset direction, and the length of the liquid injection pipe is greater than or equal to the width of the bottom net wall.

[0012] Optionally, the lithium battery recycling device further comprises a feeding mechanism, a powder discharging mechanism, and a current collector discharging mechanism, the feeding mechanism and the current collector discharging mechanism are arranged at opposite ends of the mesh net in the preset direction, the feeding mechanism is arranged above the mesh net, the current collector discharging mechanism partially extends into the mesh net, the feeding mechanism is configured to continuously feed the pole piece fragments into the mesh net, and the current collector discharging mechanism is configured to discharge the current collector out of the mesh net.

[0013] Optionally, the powder discharging mechanism comprises a first transmission roller, a second transmission roller, a third transmission roller, and a conveying belt, the conveying belt is sleeved on the first transmission roller, the second transmission roller, and the third transmission roller, the second transmission roller is arranged between the first transmission roller and the third transmission roller, the first transmission roller and the second transmission roller are arranged in the liquid storage tank and below the liquid injection pipe, the third transmission roller is arranged above the liquid storage tank, the connecting line between the axis center of the first transmission roller and the axis center of the second transmission roller forms a second preset angle with the connecting line between the axis center of the second transmission roller and the axis center of the third transmission roller, and the second preset angle ranges from 120 degrees to 150 degrees.

[0014] Optionally, the lithium battery recycling device further includes a return tank, a second liquid pump, and an inlet pipe. The inlet end of the second liquid pump is connected to the inlet pipe, which extends into the storage tank and is adjustable in a preset direction. The outlet end of the second liquid pump is connected to the return tank. The second liquid pump is used to extract liquid from the storage tank to the return tank, and the extraction flow rate of the second liquid pump is the same as the extraction flow rate of the first liquid pump.

[0015] Optionally, the stripping fluid and the impact fluid are the same, and the inlet of the first liquid pump is connected to the return tank.

[0016] The lithium battery recycling device provided by this invention has the following beneficial effects:

[0017] The lithium battery recycling device provided by this invention includes a net disposed within a storage tank for holding stripping fluid, and a net for feeding electrode fragments. A rotating spraying mechanism includes a drive motor, a spray pipe, and a first pump. The outlet of the first pump is connected to the spray pipe, and the spray pipe has spray nozzles on its circumference. The first pump draws impact fluid into the spray pipe so that the impact fluid is sprayed out from the spray nozzles. The drive motor is connected to the spray pipe, which is positioned below the net. The drive motor drives the spray pipe to rotate around its axial direction so that the impact fluid sprayed from the spray pipe impacts the electrode fragments within the net and moves the electrode fragments in a preset direction, simultaneously separating the electrode fragments into current collectors and battery materials. The preset direction is perpendicular to the axial direction of the spray pipe. Compared with the prior art, the lithium battery recycling device provided by the present invention can effectively improve the separation efficiency, shorten the soaking time, and prevent the cutting of electrode fragments by using a spray pipe located below the net and a drive motor and a first liquid pump connected to the spray pipe, thus avoiding battery material loss and improving the battery material recycling rate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a lithium battery recycling device provided in an embodiment of the present invention from one perspective;

[0020] Figure 2 This is a schematic diagram of the lithium battery recycling device provided in an embodiment of the present invention from another perspective;

[0021] Figure 3 for Figure 2 A schematic diagram of a structure with multiple spray pipes arranged side by side at intervals;

[0022] Figure 4 Structure schematic view of the lithium battery recycling device provided by the embodiment of the present application when the liquid spraying pipe is at the first rotation limit position;

[0023] Figure 5 Structure schematic view of the lithium battery recycling device provided by the embodiment of the present application when the liquid spraying pipe is at the intermediate position;

[0024] Figure 6 Structure schematic view of the lithium battery recycling device provided by the embodiment of the present application when the liquid spraying pipe is at the second rotation limit position.

[0025] Legend: 100-lithium battery recycling device; 110-liquid storage tank; 120-net; 121-bottom wall; 130-rotary liquid spraying mechanism; 131-driving motor; 132-liquid spraying pipe; 133-first liquid pump; 134-liquid spraying opening; 135-branch liquid outlet pipe; 140-feeding mechanism; 150-powder discharging mechanism; 151-first transmission roller; 152-second transmission roller; 153-third transmission roller; 154-conveying belt; 160-current collector discharging mechanism; 170-liquid return tank; 180-second liquid pump; 190-liquid inlet pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "provided", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0032] Please refer to Figure 1 and Figure 2 The lithium battery recycling device 100 provided by the embodiments of the present application is used for recycling and processing the pole piece fragments, and separates the pole piece fragments into the current collector and the battery material. It can effectively improve the separation efficiency, shorten the soaking time, and prevent the cutting of the pole piece fragments, avoid the loss of the battery material, and improve the recovery rate of the battery material.

[0033] In the present embodiment, the pole piece fragments are positive pole fragments, the current collector is aluminum foil, and the lithium battery recycling device 100 is used for recycling and processing the positive pole fragments to separate the aluminum foil and the battery material. However, it is not limited thereto. In other embodiments, the pole piece fragments can also be negative pole fragments, and at this time the current collector is copper foil. The lithium battery recycling device 100 can separate the negative pole fragments to obtain the copper foil and the battery material.

[0034] The lithium battery recycling device 100 comprises a liquid storage tank 110, a mesh 120, a rotating liquid spraying mechanism 130, a feeding mechanism 140, a powder discharging mechanism 150, a current collector discharging mechanism 160, a liquid collecting tank 170, a second liquid pump 180, and a liquid inlet pipe 190. The mesh 120 is arranged in the liquid storage tank 110, which is used to store stripping liquid, and the mesh 120 is used for feeding the electrode piece fragments. The stripping liquid can pass through the mesh holes of the mesh 120 into the interior of the mesh 120 and contact and chemically react with the electrode piece fragments in the mesh 120. The rotating liquid spraying mechanism 130 is installed in the liquid storage tank 110 and arranged below the mesh 120. The rotating liquid spraying mechanism 130 is used to spray impact liquid outward while rotating to impact the electrode piece fragments through the mesh holes of the mesh 120, so that the electrode piece fragments tumble in the mesh 120, accelerate the reaction of the electrode piece fragments with the stripping liquid, improve the separation efficiency of the current collector and the battery material in the electrode piece fragments, shorten the soaking time of the electrode piece fragments, and in the process, there is no hard object (such as a stirring paddle) in direct contact with the electrode piece fragments, which can prevent the electrode piece fragments from being cut, avoid battery material loss, and improve the battery material recovery rate.

[0035] It should be noted that in the process of spraying impact liquid to impact the electrode piece fragments, the rotating liquid spraying mechanism 130 not only drives the electrode piece fragments to tumble in the mesh 120, but also pushes the electrode piece fragments to continuously move in a predetermined direction. In this process, the electrode piece fragments are separated into current collectors and battery materials under the action of the stripping liquid. The current collectors, which have a smaller density, will float on the stripping liquid and continuously move in the predetermined direction under the action of the liquid spraying of the rotating liquid spraying mechanism 130. The battery material (in the form of powder) will sink downward due to its larger density and fall out of the mesh holes of the mesh 120.

[0036] In this embodiment, the feeding mechanism 140 and the current collector discharging mechanism 160 are arranged opposite to each other at the two ends of the mesh 120 in the predetermined direction. The feeding mechanism 140 is located at the upstream end of the predetermined direction, and the current collector discharging mechanism 160 is located at the downstream end of the predetermined direction, so as to realize the functions of feeding the electrode piece fragments and discharging the current collectors. It should be understood that the upstream end and the downstream end of the predetermined direction do not represent a certain fixed point, but refer to a region. The direction from the upstream end to the downstream end is the predetermined direction. Specifically, the feeding mechanism 140 is arranged above the mesh 120, and the feeding mechanism 140 is used to continuously feed the electrode piece fragments into the mesh 120 to realize the continuous separation of the battery material and the current collector and improve the separation efficiency. The current collector discharging mechanism 160 partially extends into the mesh 120, and the current collector discharging mechanism 160 is used to discharge the current collectors out of the mesh 120 to realize the continuous discharging function of the current collectors, prevent the accumulation of the current collectors in the mesh 120, and ensure the stability of the continuous separation.

[0037] Further, the powder discharging mechanism 150 is installed in the liquid storage tank 110 and arranged below the rotary liquid spraying mechanism 130, and is used to discharge the battery material falling out of the mesh screen 120 under the action of gravity from the liquid storage tank 110, so as to realize the discharging function of the battery material and prevent the accumulation of the battery material at the bottom of the liquid storage tank 110, thereby ensuring the stability of continuous separation.

[0038] It is worth noting that, in the working process of the lithium battery recycling device 100, first, the mesh screen 120 is fixedly installed in the liquid storage tank 110, and the bottom of the mesh screen 120 is spaced apart from the bottom wall of the liquid storage tank 110; then, the stripping liquid is filled into the liquid storage tank 110, and the liquid level of the stripping liquid is lower than the top of the mesh screen 120; then, the current collector discharging mechanism 160 is inserted into the mesh screen 120 from above the mesh screen 120, and the current collector discharging mechanism 160 is immersed below the liquid level of the stripping liquid; then, the feeding mechanism 140 and the rotary liquid spraying mechanism 130 are started, the feeding mechanism 140 continuously feeds the pole piece fragments into the mesh screen 120, the pole piece fragments falling into the mesh screen 120 are continuously tumbled under the action of the liquid spraying of the rotary liquid spraying mechanism 130 and continuously move in the preset direction, in the process, the pole piece fragments rapidly react with the stripping liquid, and the battery material on the surface of the current collector is rapidly stripped, wherein the stripped battery material falls out of the mesh screen 120 under the action of gravity, and finally is discharged under the action of the powder discharging mechanism 150, and the exposed current collector moves to the current collector discharging mechanism 160 in the preset direction (the current collector floats on the liquid level of the stripping liquid, and the current collector discharging mechanism 160 is inserted below the liquid level of the stripping liquid), and is discharged under the action of the current collector discharging mechanism 160.

[0039] It can be understood that, in the working process of the lithium battery recycling device 100, the rotary liquid spraying mechanism 130 will continuously spray impact liquid into the liquid storage tank 110, which will cause the volume of the liquid in the liquid storage tank 110 to continuously increase, and the liquid level to continuously rise, which is not conducive to the continuous separation of the pole piece fragments. Therefore, in this embodiment, the inlet of the second liquid pump 180 is communicated with the liquid inlet pipe 190, the liquid inlet pipe 190 is arranged to extend into the liquid storage tank 110, the outlet of the second liquid pump 180 is communicated with the liquid return tank 170, and the second liquid pump 180 is used to pump the liquid in the liquid storage tank 110 to the liquid return tank 170, the pumping flow of the second liquid pump 180 is the same as the spraying flow of the rotary liquid spraying mechanism 130, so as to ensure that the volume of the liquid in the liquid storage tank 110 remains unchanged, thereby ensuring that the liquid level remains unchanged, and preventing the pole piece fragments from falling out of the mesh screen 120 due to the excessively high liquid level.

[0040] Further, under the action of the second liquid pump 180, the liquid in the liquid storage tank 110 will be continuously discharged from the liquid inlet pipe 190 to the liquid return tank 170, so that the liquid in the entire liquid storage tank 110 will have a tendency to move towards the liquid inlet pipe 190, that is, the position of the liquid inlet pipe 190 will affect the flow direction of the liquid in the liquid storage tank 110. In the embodiment, the insertion position of the liquid inlet pipe 190 in the preset direction is adjustable, that is, the position of the liquid inlet pipe 190 in the preset direction is adjustable, so as to assist in adjusting the time for the electrode piece fragments to move to the current collector discharging mechanism 160 under the action of the rotating liquid spraying mechanism 130, and ensure that the current collector is discharged by the current collector discharging mechanism 160 after complete peeling.

[0041] Specifically, when the insertion position of the liquid inlet pipe 190 is located at the upstream end of the preset direction, the liquid in the liquid storage tank 110 has a tendency to flow towards the upstream end of the preset direction, which is opposite to the action direction of the rotating liquid spraying mechanism 130, so as to slow down the speed of the electrode piece fragments moving along the preset direction, prolong the reaction time of the electrode piece fragments and the stripping liquid, and ensure complete separation of the electrode piece fragments. This case is mainly applied to electrode piece fragments that are difficult to peel. When the insertion position of the liquid inlet pipe 190 is located at the downstream end of the preset direction, the liquid in the liquid storage tank 110 has a tendency to flow towards the downstream end of the preset direction, which is the same as the action direction of the rotating liquid spraying mechanism 130, so as to speed up the speed of the electrode piece fragments moving along the preset direction, shorten the reaction time of the electrode piece fragments and the stripping liquid, and further improve the separation efficiency and shorten the soaking time. This case is mainly applied to electrode piece fragments that are easy to peel. Similarly, the liquid inlet pipe 190 can be inserted into the liquid storage tank 110 at other positions in the preset direction to appropriately slow down or speed up the speed of the electrode piece fragments moving along the preset direction. The specific position of the liquid inlet pipe 190 inserted into the liquid storage tank 110 needs to be determined according to the actual situation.

[0042] In the embodiment, the stripping liquid and the impact liquid are the same (both the chemical composition and the ratio are the same), and are acid solution or alkali solution. The rotating liquid spraying mechanism 130 is communicated with the liquid return tank 170, and the rotating liquid spraying mechanism 130 is used to extract the liquid in the liquid return tank 170 and spray it into the liquid storage tank 110, so as to realize the recycling of the liquid and ensure that the volume of the liquid in the liquid storage tank 110 remains unchanged. However, it is not limited to this, in other embodiments, the impact liquid can also be an oil-based solution or a water-based solution which is immiscible with the stripping liquid. In this case, the impact liquid and the stripping liquid flow into the liquid return tank 170 under the action of the second liquid pump 180, and the impact liquid and the stripping liquid in the liquid return tank 170 need to be physically separated before being respectively sent back to the rotating liquid spraying mechanism 130 and the liquid storage tank 110, and the volume of the liquid in the liquid storage tank 110 needs to be kept unchanged.

[0043] Please refer to Figure 2 andFigure 3 The rotating liquid spraying mechanism 130 comprises a driving motor 131, a liquid spraying pipe 132 and a first liquid pump 133. The liquid inlet end of the first liquid pump 133 is communicated with the liquid return tank 170, the liquid outlet end of the first liquid pump 133 is communicated with the liquid spraying pipe 132, and the first liquid pump 133 is used to extract the liquid in the liquid return tank 170 to the liquid spraying pipe 132, which is the stripping liquid and the impact liquid. The circumferential surface of the liquid spraying pipe 132 is provided with a liquid spraying port 134, and the first liquid pump 133 is used to extract the impact liquid into the liquid spraying pipe 132, so that the impact liquid is sprayed out of the liquid spraying port 134. The extraction flow of the second liquid pump 180 is the same as the extraction flow of the first liquid pump 133, so as to ensure that the volume of the liquid in the liquid storage tank 110 remains unchanged. The driving motor 131 is connected with the liquid spraying pipe 132, the liquid spraying pipe 132 is arranged below the meshing net 120, and the powder discharging mechanism 150 is arranged below the liquid spraying pipe 132. The driving motor 131 is used to drive the liquid spraying pipe 132 to rotate around the axial direction, so that the impact liquid sprayed from the liquid spraying pipe 132 impacts the pole piece fragments in the meshing net 120, drives the pole piece fragments to move in a preset direction, synchronously separates the pole piece fragments into the current collector and the battery material, and the preset direction is perpendicular to the axial direction of the liquid spraying pipe 132.

[0044] Specifically, the liquid spraying pipe 132 sprays the impact liquid outwards through the liquid spraying port 134 in the process of rotation. On the one hand, the impact liquid can exert impact force on the pole piece fragments, so that the pole piece fragments roll in the meshing net 120, accelerate the separation speed of the pole piece fragments, improve the stripping speed of the current collector and the battery material, and prevent the hard collision from cutting the pole piece fragments, thereby improving the battery material recovery rate. On the other hand, the rotating direction of the vertex position of the liquid spraying pipe 132 is the same as the preset direction, so that the impact liquid sprayed by the liquid spraying pipe 132 can generate a thrust on the stripping liquid in the meshing net 120, and drive the stripping liquid in the meshing net 120 to flow in the preset direction, thereby driving the pole piece fragments sent into the meshing net 120 from the feeding mechanism 140 to move to the current collector discharging mechanism 160. In the process of movement, the pole piece fragments are separated into the current collector and the battery material under the action of the stripping liquid, wherein the current collector floats on the stripping liquid due to the smaller density and moves to the current collector discharging mechanism 160 along the preset direction, and the battery material sinks downward due to the larger density and falls to the powder discharging mechanism 150 through the area where the meshing net 120 and the liquid spraying pipe 132 are located.

[0045] It is worth noting that the number of liquid injection pipes 132 is multiple, the multiple liquid injection pipes 132 are arranged side by side and spaced apart along the preset direction, the driving motor 131 is connected with the multiple liquid injection pipes 132 to drive the multiple liquid injection pipes 132 to rotate synchronously, the impact liquid sprayed by the multiple liquid injection pipes 132 can cover all positions of the pocket screen 120 in the preset direction, and the multiple liquid injection pipes 132 jointly act to synchronously spray the impact liquid into the pocket screen 120, so that all the pole piece fragments in the pocket screen 120 can be subjected to the impact force, and all the pole piece fragments in the pocket screen 120 move towards the preset direction while tumbling, thereby facilitating continuous separation.

[0046] In the embodiment, the number of driving motors 131 is multiple, each driving motor 131 is connected with one liquid injection pipe 132, and each driving motor 131 is used to drive one liquid injection pipe 132 to rotate, and the multiple driving motors 131 act synchronously. The liquid outlet end of the first liquid pump 133 is provided with multiple branch liquid outlet pipes 135, each branch liquid outlet pipe 135 is communicated with one liquid injection pipe 132, and the first liquid pump 133 is used to synchronously draw the liquid in the liquid return tank 170 into the multiple branch liquid outlet pipes 135, and then make the liquid flow into the multiple liquid injection pipes 132.

[0047] In the embodiment, the pocket screen 120 is provided with a bottom screen wall 121, the bottom screen wall 121 is rectangular, and the multiple liquid injection pipes 132 are arranged below the bottom screen wall 121. The length direction of the bottom screen wall 121 is the preset direction, and the width direction of the bottom screen wall 121 is the axial direction of the liquid injection pipe 132. The length of the liquid injection pipe 132 is greater than or equal to the width of the bottom screen wall 121, so as to ensure that the impact liquid sprayed by the liquid injection pipe 132 can cover all positions of the pocket screen 120 in the width direction, and ensure that all the pole piece fragments in the pocket screen 120 can be subjected to the impact force.

[0048] Further, the number of liquid injection ports 134 is multiple, the multiple liquid injection ports 134 are arranged spaced apart along the axial direction of the liquid injection pipe 132, the impact liquid drawn into the liquid injection pipe 132 under the action of the first liquid pump 133 can be sprayed outwards from the multiple liquid injection ports 134 at the same time, so as to synchronously spray the impact liquid into the pocket screen 120, so that all the pole piece fragments in the pocket screen 120 move towards the preset direction while tumbling, thereby facilitating continuous separation.

[0049] Please refer to Figure 4 , Figure 5 and Figure 6, it is to be noted that the liquid spraying pipe 132 has a first rotation limit position, an intermediate position and a second rotation limit position. In the process of rotating the liquid spraying pipe 132 from the first rotation limit position to the second rotation limit position, the rotation direction of the vertex position of the liquid spraying pipe 132 is the same as the preset direction; in the process of rotating the liquid spraying pipe 132 from the second rotation limit position to the first rotation limit position, the rotation direction of the vertex position of the liquid spraying pipe 132 is opposite to the preset direction. The liquid spraying pipe 132 is used to reach the second rotation limit position after rotating a first preset angle from the first rotation limit position, and the liquid spraying pipe 132 is also used to reach the first rotation limit position after rotating back the first preset angle from the second rotation limit position. Specifically, the first liquid pump 133 is used to start in the case of rotating the liquid spraying pipe 132 from the first rotation limit position to the second rotation limit position, in this process, the rotation direction of the vertex position of the liquid spraying pipe 132 is the same as the preset direction, and the liquid spraying pipe 132 sprays impact liquid into the mesh screen 120 under the action of the first liquid pump 133 to drive the pole piece fragments to roll and move in the preset direction. The first liquid pump 133 is also used to close in the case of rotating the liquid spraying pipe 132 from the second rotation limit position to the first rotation limit position, in this process, the rotation direction of the vertex position of the liquid spraying pipe 132 is opposite to the preset direction, and the liquid spraying pipe 132 does not spray impact liquid outward to realize the rotation reset of the liquid spraying pipe 132 and does not affect the flow direction of the liquid in the mesh screen 120.

[0050] Specifically, the first preset angle ranges from 30 degrees to 90 degrees, and a reasonable first preset angle can ensure the impact effect on the pole piece fragments and improve the speed of the pole piece fragments moving in the preset direction. In the embodiment, the first preset angle is 60 degrees, but it is not limited thereto, and in other embodiments, the first preset angle can be 30 degrees or 90 degrees, and the size of the first preset angle is not specifically limited.

[0051] Further, the intermediate position is located at the midpoint between the first rotation limit position and the second rotation limit position, and the liquid spraying pipe 132 is also used to reach the intermediate position after rotating half of the first preset angle (i.e., rotating 30 degrees) from the first rotation limit position, and similarly, the liquid spraying pipe 132 is also used to reach the intermediate position after rotating back half of the first preset angle (i.e., rotating 30 degrees) from the second rotation limit position. Specifically, the liquid spraying port 134 is used to extend and be arranged in the vertically upward direction in the case of rotating the liquid spraying pipe 132 to the intermediate position, that is, when the liquid spraying pipe 132 is rotated to the intermediate position, the liquid spraying port 134 extends and is arranged in the vertically upward direction, which can ensure that the extension direction of the liquid spraying port 134 when the liquid spraying pipe 132 is in the first rotation limit position and the extension direction of the liquid spraying port 134 when the liquid spraying pipe 132 is in the second rotation limit position are symmetrically arranged along the vertical direction, thereby further improving the impact effect on the pole piece fragments.

[0052] Please continue to refer to Figure 1In the embodiment, the feeding mechanism 140, the powder discharging mechanism 150 and the current collector discharging mechanism 160 are all conveyor belt mechanisms. The feeding mechanism 140 feeds the pole piece fragments into the meshing net 120 by means of conveyor belt conveying, so as to realize the feeding function of the pole piece fragments. The powder discharging mechanism 150 discharges the battery material falling thereon from the liquid storage tank 110 by means of conveyor belt conveying, so as to realize the discharging function of the battery material. The current collector discharging mechanism 160 discharges the current collector falling thereon from the meshing net 120 by means of conveyor belt conveying, so as to realize the discharging function of the current collector. However, it is not limited to this. In another embodiment, the powder discharging mechanism 150 can also be a scraper mechanism. The battery material will sink downward due to its high density and fall through the meshing net 120 and the area where the liquid spraying pipe 132 is located to the bottom wall of the liquid storage tank 110. The powder discharging mechanism 150 scrapes the battery material on the bottom wall of the liquid storage tank 110 away by means of the scraper and discharges it from the liquid storage tank 110, so as to realize the discharging function of the battery material. In another embodiment, the powder discharging mechanism 150 can also be a suction pump mechanism. The battery material will sink downward due to its high density and fall through the meshing net 120 and the area where the liquid spraying pipe 132 is located to the bottom wall of the liquid storage tank 110. The powder discharging mechanism 150 sucks the battery material on the bottom wall of the liquid storage tank 110 out of the liquid storage tank 110 by means of the suction pump, so as to realize the discharging function of the battery material.

[0053] The powder discharging mechanism 150 comprises a first driving roller 151, a second driving roller 152, a third driving roller 153 and a conveyor belt 154. The conveyor belt 154 is sleeved on the first driving roller 151, the second driving roller 152 and the third driving roller 153 at the same time. The second driving roller 152 is arranged between the first driving roller 151 and the third driving roller 153. The first driving roller 151, the second driving roller 152 and the third driving roller 153 rotate synchronously to drive the conveyor belt 154 to move at a constant speed. The first driving roller 151 and the second driving roller 152 are arranged in the liquid storage tank 110 and below the liquid spraying pipe 132. The third driving roller 153 is arranged above the liquid storage tank 110. The peeled battery material sinks downward and falls on the conveyor belt 154 between the first driving roller 151 and the second driving roller 152. The conveyor belt 154 conveys the battery material toward the third driving roller 153, so that the battery material is separated from the stripping liquid and moves out of the liquid storage tank 110, thereby realizing the discharging function of the battery material.

[0054] Specifically, the line connecting the axis of the first transmission roller 151 and the axis of the second transmission roller 152 forms a second preset angle with the line connecting the axis of the second transmission roller 152 and the axis of the third transmission roller 153, and the second preset angle ranges from 120 degrees to 150 degrees. A reasonable second preset angle can ensure that the battery material will not fall off the conveying belt 154 when the battery material is sent out between the second transmission roller 152 and the third transmission roller 153. In the embodiment, the second preset angle is 130 degrees, but it is not limited thereto. In other embodiments, the second preset angle can be 120 degrees or 150 degrees, and the size of the second preset angle is not specifically limited.

[0055] The lithium battery recycling device 100 provided by the embodiment of the application, the mesh net 120 is arranged in the liquid storage tank 110, the liquid storage tank 110 is used for containing stripping liquid, the mesh net 120 is used for feeding the pole piece fragments, the rotating liquid spraying mechanism 130 comprises a driving motor 131, a liquid spraying pipe 132 and a first liquid pump 133, the liquid outlet end of the first liquid pump 133 is communicated with the liquid spraying pipe 132, the peripheral surface of the liquid spraying pipe 132 is provided with a liquid spraying port 134, the first liquid pump 133 is used for pumping the impact liquid into the liquid spraying pipe 132, so that the impact liquid is sprayed from the liquid spraying port 134, the driving motor 131 is connected with the liquid spraying pipe 132, the liquid spraying pipe 132 is arranged below the mesh net 120, the driving motor 131 is used for driving the liquid spraying pipe 132 to rotate around the axial direction, so that the impact liquid sprayed from the liquid spraying pipe 132 impacts the pole piece fragments in the mesh net 120 and drives the pole piece fragments to move in a preset direction, and the pole piece fragments are separated into the current collector and the battery material at the same time, and the preset direction is arranged perpendicularly to the axial direction of the liquid spraying pipe 132. Compared with the prior art, the lithium battery recycling device 100 provided by the application can effectively improve the separation efficiency, shorten the soaking time, prevent the cutting of the pole piece fragments, avoid the loss of the battery material and improve the recovery rate of the battery material, because the liquid spraying pipe 132 arranged below the mesh net 120 and the driving motor 131 and the first liquid pump 133 connected with the liquid spraying pipe 132 are adopted.

[0056] Further, in the working process of the lithium battery recycling device 100, the feeding mechanism 140 continuously feeds the pole piece fragments into the mesh net 120, the rotating liquid spraying mechanism 130 sprays the impact liquid to accelerate the separation of the pole piece fragments and drive them to move in a preset direction, the current collector discharging mechanism 160 continuously discharges the current collector which is separated and moves to the end of the mesh net 120 away from the feeding mechanism 140, and the powder discharging mechanism 150 continuously discharges the battery material which is settled at the bottom of the liquid storage tank 110. In this way, the separation and recovery of the pole piece fragments can be continuously carried out, the full-process automatic operation is realized, and the recovery efficiency of the lithium battery is greatly improved.

[0057] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lithium battery recycling device, characterized by, The lithium battery recycling device comprises a liquid storage tank (110), a mesh (120) and a rotating liquid spraying mechanism (130), the mesh (120) is arranged in the liquid storage tank (110), the liquid storage tank (110) is used for containing stripping liquid, the mesh (120) is used for feeding electrode piece fragments, and the rotating liquid spraying mechanism (130) comprises a driving motor (131), a liquid spraying pipe (132) and a first liquid pump (133), the liquid outlet end of the first liquid pump (133) is communicated with the liquid spraying pipe (132), the peripheral surface of the liquid spraying pipe (132) is provided with a liquid spraying port (134), the first liquid pump (133) is used for pumping impact liquid into the liquid spraying pipe (132), so that the impact liquid is sprayed out of the liquid spraying port (134), the driving motor (131) is connected with the liquid spraying pipe (132), the liquid spraying pipe (132) is arranged below the mesh (120), and the driving motor (131) is used for driving the liquid spraying pipe (132) to rotate around the axial direction, so that the impact liquid sprayed out of the liquid spraying pipe (132) impacts the electrode piece fragments in the mesh (120) and drives the electrode piece fragments to move towards a preset direction, and the electrode piece fragments are simultaneously separated into current collectors and battery materials, and the preset direction is perpendicular to the axial direction of the liquid spraying pipe (132); The liquid spraying pipe (132) has a first rotation limit position and a second rotation limit position, the liquid spraying pipe (132) is used for rotating a first preset angle from the first rotation limit position to reach the second rotation limit position, the liquid spraying pipe (132) is also used for rotating the first preset angle from the second rotation limit position to reach the first rotation limit position, the first preset angle ranges from 30 degrees to 90 degrees, the first liquid pump (133) is used for starting when the liquid spraying pipe (132) rotates from the first rotation limit position to the second rotation limit position, and the first liquid pump (133) is also used for closing when the liquid spraying pipe (132) rotates from the second rotation limit position to the first rotation limit position; The mesh (120) is provided with a bottom mesh wall (121), the bottom mesh wall (121) is rectangular, and the length direction of the bottom mesh wall (121) is the preset direction; The lithium battery recycling device further comprises a feeding mechanism (140) and a current collector discharging mechanism (160), and the feeding mechanism (140) and the current collector discharging mechanism (160) are oppositely arranged at two ends of the mesh (120) in the preset direction.

2. The lithium battery recycling device of claim 1, wherein, The number of the liquid spraying pipes (132) is multiple, multiple liquid spraying pipes (132) are arranged side by side and at intervals along the preset direction, and the driving motor (131) is connected with multiple liquid spraying pipes (132) to drive multiple liquid spraying pipes (132) to rotate synchronously.

3. The lithium battery recycling device of claim 1, wherein, The number of the liquid spraying ports (134) is multiple, and multiple liquid spraying ports (134) are arranged at intervals along the axial direction of the liquid spraying pipe (132).

4. The lithium battery recycling device of claim 1, wherein, The liquid spraying pipe (132) also has an intermediate position, the liquid spraying pipe (132) reaches the intermediate position after being rotated by half of the first preset angle from the first rotation limit position, and the liquid spraying port (134) extends in the vertical upward direction when the liquid spraying pipe (132) is rotated to the intermediate position.

5. The lithium battery recycling device according to claim 1, characterized in that, The length of the liquid spraying pipe (132) is greater than or equal to the width of the bottom net wall (121).

6. The lithium battery recycling device of claim 1, wherein, The lithium battery recycling device also comprises a powder discharging mechanism (150), the feeding mechanism (140) is arranged above the pocket net (120), the current collector discharging mechanism (160) is partially arranged in the pocket net (120), the feeding mechanism (140) is used for continuously feeding the pole piece fragments into the pocket net (120), the current collector discharging mechanism (160) is used for discharging the current collector from the pocket net (120), and the powder discharging mechanism (150) is arranged below the liquid spraying pipe (132). The powder discharging mechanism (150) is used for discharging the battery material that is settled and falls out of the pocket net (120) under the action of gravity out of the liquid storage tank (110).

7. The lithium battery recycling device of claim 6, wherein, The powder discharging mechanism (150) comprises a first transmission roller (151), a second transmission roller (152), a third transmission roller (153) and a conveying belt (154). The conveying belt (154) is sleeved outside the first transmission roller (151), the second transmission roller (152) and the third transmission roller (153) at the same time. The second transmission roller (152) is arranged between the first transmission roller (151) and the third transmission roller (153). The first transmission roller (151) and the second transmission roller (152) are arranged in the liquid storage tank (110) and below the liquid spraying pipe (132). The third transmission roller (153) is arranged above the liquid storage tank (110). The connecting line of the axis center of the first transmission roller (151) and the axis center of the second transmission roller (152) forms a second preset angle with the connecting line of the axis center of the second transmission roller (152) and the axis center of the third transmission roller (153). The second preset angle ranges from 120 degrees to 150 degrees.

8. The lithium battery recycling device of claim 1, wherein, The lithium battery recycling device also comprises a liquid return tank (170), a second liquid pump (180) and a liquid inlet pipe (190). The liquid inlet end of the second liquid pump (180) is communicated with the liquid inlet pipe (190). The liquid inlet pipe (190) is arranged in the liquid storage tank (110) and the extension position of the liquid inlet pipe (190) is adjustable in the preset direction. The liquid outlet end of the second liquid pump (180) is communicated with the liquid return tank (170). The second liquid pump (180) is used for pumping the liquid in the liquid storage tank (110) to the liquid return tank (170). The pumping flow of the second liquid pump (180) is the same as the pumping flow of the first liquid pump (133).

9. The lithium battery recycling device of claim 8, wherein, The stripping liquid and the impact liquid are the same, and the liquid inlet end of the first liquid pump (133) is communicated with the liquid return tank (170).

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