Positive plate and pole powder recovery device of waste lithium battery

Abstract

The embodiment of the utility model provides a waste lithium battery positive plate pole powder recovery device which comprises a powder storage tank, the bottom of the side face of the powder storage tank is fixedly connected with one end of a conveying pipe, and the powder storage tank is communicated with the conveying pipe; the top of the powder storage tank is fixedly connected with the bottom of a hopper, and the hopper is communicated with the powder storage tank; a smashing device and a screening device are arranged in the hopper, and the smashing device is located above the screening device. A conveying device is fixedly installed on the top of the side face of the hopper. The positive plates can be conveyed into the hopper through the conveying device, then fall into the smashing device to be smashed and then are screened through the screening device, the screened electrode powder falls into the powder storage tank and finally is conveyed to other stations through the conveying pipe, the positive plates can be rapidly and efficiently conveyed, large-scale smashing and screening automation of the positive plates is achieved, and the working efficiency is improved. The problems that workers need to carry the positive plate powder manually, the labor cost is high, and the working efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of battery recycling, in particular to a positive plate powder recycling device for waste lithium batteries. BACKGROUND

[0002] Lithium batteries, as a kind of battery technology using lithium metal or lithium alloy as positive / negative electrode material and adopting non-aqueous electrolyte solution, have become a widely used energy storage tool due to its high energy density, long cycle life and environmental friendliness. In the production and recycling process of lithium batteries, the treatment of positive plates is a key link, especially the dust generated by the positive plates, which contains high-value lithium and other metal components. Effective recovery of these dusts is of great significance for resource recycling and environmental protection.

[0003] Currently, the mainstream method for recycling and processing lithium battery positive plate dust relies on professional screening equipment. However, in the actual operation process, a significant bottleneck exists in the material pretreatment stage. Currently, many production lines still require workers to manually tear and preliminarily crush the positive plates, which not only has high labor intensity, but also greatly limits the overall processing efficiency, making the recovery efficiency directly related to the physical condition of the workers, and it is difficult to realize continuous and efficient production operation.

[0004] In order to overcome the efficiency bottleneck caused by manual pretreatment, another attempt is to use a professional crusher for crushing. The crusher can quickly reduce the positive plates to a suitable particle size range through high-speed rotating blades or grinding media. Although this method improves the crushing efficiency, it still exposes deficiencies in subsequent processing. Specifically, the material after crushing often needs to be manually transported to the screening equipment by workers, which not only increases labor costs, but also interrupts the automated production process, resulting in the overall working efficiency of the equipment not being fully utilized, and also prolonging the overall processing cycle, causing both time and resource waste. CONTENT OF THE UTILITY MODEL

[0005] The application embodiment provides a positive plate powder recycling device for waste lithium batteries, which transports the positive plates to the crushing device through the conveying device, and transports them out through the conveying pipe after crushing by the crushing device and screening by the screening device, solving the problems of high labor cost and low work efficiency caused by manual transportation of positive plate powder by workers.

[0006] In one aspect, the application embodiment provides a positive plate powder recycling device for waste lithium batteries, which includes a powder storage tank, one end of a conveying pipe is fixedly connected to the side bottom of the powder storage tank, and the powder storage tank is in communication with the conveying pipe.

[0007] The top of the powder storage tank is fixedly connected with the bottom of a hopper, and the hopper is in communication with the powder storage tank;

[0008] The hopper is internally provided with a crushing device and a screening device, and the crushing device is located above the screening device;

[0009] The side top of the hopper is fixedly provided with a conveying device.

[0010] In a feasible implementation, the hopper comprises an upper hopper and a lower hopper, the upper hopper and the lower hopper are fixedly connected and internally communicated, and the upper part of the lower hopper is in a conical structure;

[0011] The crushing device and the screening device are both arranged in the lower hopper;

[0012] The side top of the upper hopper is provided with an assembly opening, and the conveying device is fixedly arranged in the assembly opening.

[0013] In a feasible implementation, the crushing device comprises two first rotating shafts which are parallel to each other, both of the first rotating shafts are rotatably arranged in the lower hopper, the first rotating shaft is externally provided with a rotating terminal, and the outer periphery of the rotating terminal is fixedly provided with a plurality of crushing teeth;

[0014] The lower hopper is externally fixedly provided with a first driving device, and both of the first rotating shafts are connected with the first driving device.

[0015] In a feasible implementation, the inner wall of the lower hopper is fixedly provided with a limiting block on both sides, and the crushing device is located between the two limiting blocks.

[0016] In a feasible implementation, each limiting block comprises an upper limiting block and a lower limiting block, the upper limiting block is in a wedge structure and the wedge surface faces the top opening of the hopper, the opposite surfaces of the two lower limiting blocks are both provided with a groove, and part of the rotating terminal and part of the crushing teeth are respectively located in the corresponding grooves.

[0017] In a feasible implementation, the screening device comprises a screening plate which is arranged in an inclined manner, the higher side of the screening plate is rotatably connected with the lower hopper through a second rotating shaft, the bottom of the lower side of the screening plate is hingedly connected with the upper end of an electric push rod, and the lower end of the electric push rod is hingedly connected with the inner wall of the lower hopper;

[0018] One side of the lower hopper is provided with a discharge port, and the discharge port is located at the lower side of the screening plate.

[0019] In a feasible implementation, the conveying device comprises two mutually parallel side plates, both of which are fixedly connected with the hopper, and at least two third rotating shafts are rotatably installed between the two side plates, and the at least two third rotating shafts are connected by a conveying belt.

[0020] The outer side of one of the side plates is fixedly installed with a second driving device, and the at least one third rotating shaft is connected with the second driving device.

[0021] In a feasible implementation, the outer surface of the conveying belt is fixedly installed with a plurality of push plates.

[0022] In a feasible implementation, the other end of the conveying pipe is connected with a negative pressure device.

[0023] In another aspect, the embodiment of the present application provides a positive plate powder recycling device for waste lithium batteries, which comprises a powder storage device and a powder conveying device, and the powder storage device is in communication with the powder conveying device.

[0024] The powder conveying device is connected with a negative pressure device.

[0025] The top of the powder storage device is provided with a crushing and screening device, and the powder storage device is in communication with the crushing and screening device.

[0026] One side of the crushing and screening device is provided with a positive plate conveying device.

[0027] The positive plate powder recycling device for waste lithium batteries provided by the embodiment of the present application can convey the positive plate into the hopper through the conveying device, then crush the positive plate through the crushing device, then screen the positive plate through the screening device, and finally send the screened positive plate powder to other stations through the conveying pipe. The positive plate can be quickly and efficiently conveyed, the large-scale crushing and screening automation of the positive plate is realized, the problems of high labor cost and low work efficiency caused by manual transportation of the positive plate powder by workers are solved, and the comprehensive efficiency and economic benefit of lithium battery recycling are improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structure diagram of a positive plate powder recycling device for waste lithium batteries provided by an embodiment of the present application Figure 1 ;

[0029] Figure 2 is a structure diagram of a positive plate powder recycling device for waste lithium batteries provided by an embodiment of the present application Figure 2 ;

[0030] Figure 3 is a structure diagram of a positive plate powder recycling device for waste lithium batteries provided by an embodiment of the present application Figure 3 ;

[0031] Figure 4 is Figure 1 the structural schematic view of the hopper;

[0032] Figure 5 is Figure 1 the structural schematic view of the crushing device;

[0033] Figure 6 is Figure 1 the structural schematic view of the screening device;

[0034] Figure 7 is Figure 1 the structural schematic view of the conveying device.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1 - powder storage tank; 2 - conveying pipe; 3 - hopper; 4 - base; 5 - crushing device; 6 - conveying device; 7 - screening device;

[0037] 31 - upper hopper; 32 - lower hopper; 33 - feeding port; 34 - assembly port;

[0038] 51 - shell; 52 - first motor; 53 - first rotating shaft; 54 - rotating terminal; 55 - crushing tooth; 56 - limiting block;

[0039] 61 - side plate; 62 - third rotating shaft; 63 - conveying belt; 64 - protective shell; 65 - second motor;

[0040] 71 - screening plate; 72 - second rotating shaft; 73 - electric push rod; 74 - discharge port. DETAILED DESCRIPTION

[0041] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0042] Figure 1 is the structural schematic view of the positive pole powder recovery device for waste lithium batteries provided by an embodiment of the present application Figure 1 ; Figure 2 is the structural schematic view of the positive pole powder recovery device for waste lithium batteries provided by an embodiment of the present application Figure 2 ; Figure 3 is the structural schematic view of the positive pole powder recovery device for waste lithium batteries provided by an embodiment of the present application Figure 3; Figure 4 yes Figure 1 Schematic diagram of the structure of the middle hopper; Figure 5 yes Figure 1 Schematic diagram of the medium-sized crushing device; Figure 6 yes Figure 1 A schematic diagram of the screening device; Figure 7 yes Figure 1 A schematic diagram of the conveyor system. (Refer to...) Figures 1 to 3 As shown in the figure, this application provides a device for recycling positive electrode powder from waste lithium batteries, including a powder storage tank 1. One end of a conveying pipe 2 is fixedly connected to the bottom side of the powder storage tank 1, and the powder storage tank 1 is connected to the conveying pipe 2.

[0043] The top of the powder storage tank 1 is fixedly connected to the bottom of the hopper 3, and the hopper 3 is connected to the powder storage tank 1;

[0044] The hopper 3 is equipped with a crushing device 5 and a screening device 7, with the crushing device 5 located above the screening device 7.

[0045] The conveying device 6 is fixedly installed on the top side of the hopper 3.

[0046] It should be noted that, Figures 1 to 6 To illustrate the internal structure of hopper 3, an open structural diagram is used. In actual applications, the front of hopper 3 is a closed structure to minimize the movement of fragments and powder generated during the crushing of the positive electrode sheet out of hopper 3. Additionally, negative pressure can be applied to the conveying pipe 2 to draw the powder towards the storage tank 1 and the conveying pipe 2, further preventing outward dispersion. This also allows the powder in the storage tank 1 to be conveyed to other workstations, such as screening equipment, via the conveying pipe 2.

[0047] To ensure the overall stability of the device, a base 4 is fixedly installed at the bottom of the powder storage tank 1. The cross-sectional area of ​​the base 4 is larger than the maximum cross-sectional area of ​​the powder storage tank 1. It is easy to understand that the base 4 can be flexibly set according to the actual application. It can be directly set on the ground or buried in the ground to reduce the overall height of the device. This application does not limit this.

[0048] To ensure the airtightness between the powder storage tank 1 and the conveying pipe 2, a sealing gasket can be installed between them. For the same reason, the powder storage tank 1 and the hopper 3 can be connected by flanges, bolts, and sealing gaskets, or they can be welded together.

[0049] It is easy to understand that, in order to ensure that the electrode sheet can fall into the hopper 3 more smoothly, an angle is arranged between the length direction of the conveying device 6 and the horizontal plane, and the angle is 15°-30°. Further, in order to ensure the stability of the connection between the conveying device 6 and the hopper 3, a support can be arranged at the distal end of the conveying device 6 relative to the hopper 3, and the distal end of the support relative to the conveying device 6 can be connected with the powder storage tank 1 or the base 4, and the support is not shown in the figure.

[0050] In the above embodiment, the positive electrode sheet of the waste lithium battery is conveyed to the hopper 3 by the conveying device 6, and when it moves to the end of the conveying device 6, it falls into the hopper 3 under the action of inertia and gravity. The crushing device 5 in the hopper 3 crushes the positive electrode sheet, which can quickly and efficiently convey the positive electrode sheet, realize large-scale and automatic crushing processing of the positive electrode sheet, and screen the crushed electrode powder through the screening device 7, realize the integration of the crushing device and the screening device, shorten the conveying time and distance between the two, and improve the overall working efficiency of the device.

[0051] In addition, the conveying speed of the conveying device 6 can be controlled to control the falling point of the positive electrode sheet. In the embodiment of the application, the positive electrode sheet falls in the middle area of the hopper 3.

[0052] Referring to Figures 1 to 4 In some examples, the hopper 3 includes an upper hopper 31 and a lower hopper 32, which are fixedly connected and internally communicated, and the upper part of the lower hopper 32 is a tapered structure.

[0053] The crushing device 5 and the screening device 7 are arranged in the lower hopper 32.

[0054] The side top of the upper hopper 31 is provided with a mounting opening 34, and the conveying device 6 is fixedly installed in the mounting opening 34.

[0055] It is easy to understand that the upper hopper 31 and the lower hopper 32 are welded as a whole, and the welding seam is continuous and uninterrupted, which can avoid the powder from escaping to the outside through the gap between the upper hopper 31 and the lower hopper 32.

[0056] In the above embodiment, the top of the upper hopper 31 is open, and the cross section is large, which can more conveniently receive the positive electrode sheet. The lower hopper 32 is gradually narrowed from top to bottom, so that the powder obtained by the crushing device 5 can more concentratedly fall to the screening device 7 for screening, which is also conducive to the more concentrated entry of the screened powder into the inside of the powder storage tank 1, facilitating subsequent conveying.

[0057] Referring to Figures 1 to 5As shown in the drawings, in some examples, the crushing device 5 includes two first rotating shafts 53 parallel to each other, both of which are rotatably installed in the hopper 32, and the first rotating shaft 53 is sleeved with a rotating terminal 54, and the outer periphery of the rotating terminal 54 is fixedly installed with a plurality of crushing teeth 55.

[0058] The hopper 32 is fixedly installed with a first driving device outside, and the two first rotating shafts 53 are respectively connected with the first driving device.

[0059] It should be noted that, referring to Figure 3 As shown in the drawings, the first driving device is a first motor 52, and the number of first motors 52 is two, and the output shafts of the two first motors 52 are opposite in direction. Specifically, referring to Figure 3 As shown in the drawings, the output shaft of the left first motor 52 rotates clockwise, and the output shaft of the right first motor 52 rotates counterclockwise. The outer wall of the hopper 32 is fixedly installed with two housings 51, which are symmetrically distributed on the outer wall of the hopper 32, and the opposite faces of the two housings 51 are open. The first motor 52 is fixedly installed inside the corresponding housing 51 to form support and protection for the first motor 52, and the output end of the first motor 52 is connected with one end of the corresponding first rotating shaft 53.

[0060] In order to ensure the sealing and smooth rotation of the device, it is easy to understand that the output shaft of the first motor 52 or one end of the first rotating shaft 53 penetrates the hopper 32, and a bearing is arranged at the penetration position, specifically, a sealing bearing is selected, which can effectively prevent the powder from leaking at the penetration position.

[0061] In the above embodiment, the crushing function of the positive electrode sheet is realized by the two first rotating shafts 53 parallel to each other and opposite in direction, and the crushing teeth 55 installed thereon. At the same time, the driving of the two first rotating shafts 53 is realized by the first driving device (i.e. two first motors 52) arranged outside the hopper 32.

[0062] Continuing to refer to Figures 1 to 5 As shown in the drawings, in some examples, the inner wall of the hopper 32 is fixedly installed with a limiting block 56 on both sides, and the crushing device 5 is located between the two limiting blocks 56.

[0063] Referring to Figure 4 and Figure 5 As shown in the drawings, in some examples, each limiting block 56 includes an upper limiting block and a lower limiting block, the upper limiting block is a wedge structure with the wedge face facing the top opening of the hopper 3, and the opposite faces of the two lower limiting blocks are both provided with a groove, and part of the rotating terminal 54 and part of the crushing teeth 55 are respectively located in the corresponding groove.

[0064] It is easy to understand that the proximal ends of the two upper limit blocks extend above the corresponding rotating terminals 54, and after the positive electrode sheet enters the feeding hopper 31 through the conveying device 6, it can fall between the two rotating terminals 54 and be crushed by the crushing teeth 55. The positive electrode sheet that falls on the wedge surface of the upper limit block can also enter the correct crushing position along the wedge surface under the action of gravity, so as to prevent the positive electrode sheet from falling outside the rotating terminal 54. The thickness of the lower limit block gradually thins from top to bottom, and the upper limit block and the lower limit block on the same side are fixedly connected, for example, welded, or can be an integral structure, to ensure the stability and durability of the device. In other examples, other fixing methods can also be used, which are not limited in the present application.

[0065] In the above embodiment, the working range of the crushing device 5, especially the rotating terminal 54 and the crushing teeth 55, is effectively limited by the two limit blocks 56, which ensures that the positive electrode sheet can accurately fall between the two rotating terminals 54 after entering the feeding hopper 31 through the conveying device 6 and be effectively crushed by the crushing teeth 55.

[0066] Referring to Figures 1 to 6 In some examples, the screening device 7 includes an inclined screening plate 71, the higher side of the screening plate 71 is rotatably connected to the discharge hopper 32 through a second rotating shaft 72, and the lower side of the screening plate 71 is hingedly connected to the upper end of an electric push rod 73, and the lower end of the electric push rod 73 is hingedly connected to the inner wall of the discharge hopper 32.

[0067] A discharge port 74 is formed on one side of the discharge hopper 32, and the discharge port 74 is located on the lower side of the screening plate 71.

[0068] It is easy to understand that in order to prevent the positive electrode sheet from polluting the push rod of the electric push rod 73, a dust cover can be provided outside the electric push rod 73, and correspondingly, the dust cover is made of flexible material, or has elasticity, or can stretch and contract with the electric push rod 73. In order to facilitate the collection of positive electrode sheet fragments that fail to pass the screening, an outlet hopper can be connected outside the discharge port 74 to facilitate the discharge of positive electrode sheet fragments with larger volume through the discharge port 74 and the outlet hopper.

[0069] It should be noted that the outlet hopper can also be connected to a dust collection bag to collect the discharged positive electrode sheet fragments directly and prevent dust from escaping, ensuring the cleanliness and safety of the working environment.

[0070] In the above embodiment, through the repeated stretching and contraction of the electric push rod 73, the lower side of the screening plate 71 can be shaken up and down under the cooperation of the second rotating shaft 72, and positive electrode sheet fragments with larger volume can be screened out. After collection, they can be sent into the crushing device 5 again through the conveying device 6 for secondary crushing, realizing effective screening and separation of positive electrode sheet fragments and improving screening efficiency and accuracy.

[0071] Referring to Figure 2 and Figure 7 As shown in FIG. 6, in some examples, the conveying device 6 includes two side plates 61 fixedly connected with the hopper 3, at least two third rotating shafts 62 are rotatably installed between the two side plates 61, and the at least two third rotating shafts 62 are connected by a conveying belt 63.

[0072] The outer side of one of the side plates 61 is fixedly installed with a second driving device, and the at least two third rotating shafts 62 are connected with the second driving device.

[0073] It should be noted that the second driving device is a second motor 65, and the second motor 65 is fixedly installed in an open protective shell 64, and the protective shell 64 is fixedly connected with the side plate 61.

[0074] It is easy to understand that the output shaft of the second motor 65 is connected with the third rotating shaft 62, specifically, the output shaft of the second motor 65 is connected with the third rotating shaft 62 at one end of the conveying device 6 in the length direction.

[0075] In the above embodiment, the top surface of the side plate 61 is higher than the conveying surface of the conveying belt 63, which can avoid the positive plate on the conveying belt 63 from falling off, and through the cooperation of the conveying belt 63 and the third rotating shaft 62, the stable and continuous conveying of the positive plate can be realized, which greatly improves the production efficiency.

[0076] Continuing to refer to Figure 7 As shown in FIG. 6, in some examples, a plurality of push plates are fixedly installed on the outer surface of the conveying belt 63.

[0077] In the above embodiment, the push plates can ensure that the positive plate can receive uniform and stable pushing force during the conveying process, improve the conveying efficiency of the positive plate, reduce the accumulation and blockage of the positive plate during the conveying process, and further improve the smoothness and efficiency of the entire production process.

[0078] On the other hand, the embodiment of the present application provides a positive plate powder recycling device for waste lithium batteries, which comprises a powder storage device and a powder conveying device, and the powder storage device is in communication with the powder conveying device.

[0079] The powder conveying device is connected with a negative pressure device.

[0080] The top of the powder storage device is provided with a crushing and screening device, and the powder storage device is in communication with the crushing and screening device.

[0081] One side of the crushing and screening device is provided with a positive plate conveying device.

[0082] In the above embodiment, the positive electrode sheet is sent into the crushing and screening device by the positive electrode sheet conveying device, enters the powder storage device after being crushed and screened by the crushing and screening device, and the positive electrode sheet powder in the powder storage device is sent to other stations by the powder conveying device. The positive electrode sheet can be quickly and efficiently conveyed, large-scale crushing and screening automation of the positive electrode sheet is realized, the problems of high labor cost and low work efficiency caused by manual handling of the positive electrode sheet powder by workers are solved, and the comprehensive efficiency and economic benefit of lithium battery recycling are improved.

[0083] It is easy to understand that, on the basis of the several embodiments provided in the present application, other embodiments can be obtained by combining, splitting, recombining, etc. of the embodiments of the present application, and these embodiments do not exceed the protection scope of the present application.

[0084] The above specific embodiments further illustrate the purposes, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above is only a specific embodiment of the present application, and is not used to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A device for recycling positive electrode powder from waste lithium batteries, characterized in that, Including powder storage tank (1), the side bottom of the powder storage tank (1) is fixedly connected with one end of the conveying pipe (2), and the powder storage tank (1) is communicated with the conveying pipe (2); The top of the powder storage tank (1) is fixedly connected with the bottom of the hopper (3), and the hopper (3) is communicated with the powder storage tank (1); The inside of the hopper (3) is provided with a crushing device (5) and a screening device (7), and the crushing device (5) is located above the screening device (7); The side top of the hopper (3) is fixedly installed with a conveying device (6).

2. The positive electrode tab powder recovery device for waste lithium batteries according to claim 1, characterized in that, The hopper (3) comprises an upper hopper (31) and a lower hopper (32), the upper hopper (31) and the lower hopper (32) are fixedly connected and internally communicated, and the upper part of the lower hopper (32) is a conical structure; The crushing device (5) and the screening device (7) are arranged in the lower hopper (32); The side top of the upper hopper (31) is provided with an assembly opening (34), and the conveying device (6) is fixedly installed in the assembly opening (34).

3. The positive electrode tab powder recovery device for waste lithium batteries according to claim 2, characterized in that, The crushing device (5) comprises two first rotating shafts (53) parallel to each other, both the first rotating shafts (53) are rotatably installed in the lower hopper (32), the first rotating shaft (53) is sleeved with a rotating terminal (54), and a plurality of crushing teeth (55) are fixedly installed on the outer periphery of the rotating terminal (54); The lower hopper (32) is fixedly installed with a first driving device, and the two first rotating shafts (53) are connected with the first driving device.

4. The positive electrode tab powder recovery device for waste lithium batteries according to claim 3, characterized in that, The inner walls of the lower hopper (32) are fixedly installed with limiting blocks (56) on both sides, and the crushing device (5) is located between the two limiting blocks (56).

5. The positive electrode tab powder recovery device for waste lithium batteries according to claim 4, characterized in that, Each limiting block (56) comprises an upper limiting block and a lower limiting block, the upper limiting block is a wedge-shaped structure with a wedge surface facing the top opening of the hopper (3), and the opposite surfaces of the two lower limiting blocks are provided with grooves, and part of the rotating terminal (54) and part of the crushing teeth (55) are located in the corresponding grooves.

6. The device for recovering the positive electrode powder of the positive electrode sheet of the waste lithium battery according to any one of claims 2-5, characterized in that, The screening device (7) comprises an inclined screening plate (71), the higher side of the screening plate (71) is rotatably connected with the lower hopper (32) through a second rotating shaft (72), the lower side of the screening plate (71) is hingedly connected with the upper end of an electric push rod (73), and the lower end of the electric push rod (73) is hingedly connected with the inner wall of the lower hopper (32); One side of the lower hopper (32) is provided with a discharge port (74), and the discharge port (74) is located on the lower side of the screening plate (71).

7. The device for recovering the positive electrode powder of the positive electrode sheet of the waste lithium battery according to any one of claims 1 to 5, characterized by, The conveying device (6) comprises two side plates (61) parallel to each other, both the side plates (61) are fixedly connected with the hopper (3), at least two third rotating shafts (62) are rotatably installed between the two side plates (61), and the at least two third rotating shafts (62) are connected through a conveying belt (63); The outer side of one of the side plates (61) is fixedly installed with a second driving device, and at least one of the third rotating shafts (62) is connected with the second driving device. 8.The device for recovering positive electrode powder of a waste lithium battery according to claim 7, characterized in that, A plurality of push plates are fixedly installed on the outer surface of the conveying belt (63). 9.The device for recovering positive electrode powder of a waste lithium battery according to any one of claims 1-5, characterized in that, The other end of the conveying pipe (2) is connected with a negative pressure device.

10. A device for recycling positive electrode powder from waste lithium batteries, characterized in that, The application relates to a powder conveying device, which comprises a powder storage device and a powder conveying device, wherein the powder storage device is communicated with the powder conveying device; The powder conveying device is connected with a negative pressure device; The top of the powder storage device is provided with a crushing and screening device, and the powder storage device is communicated with the crushing and screening device; One side of the crushing and screening device is provided with a positive plate conveying device.

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