New energy lithium iron phosphate battery positive electrode material recycling device

Abstract

The utility model discloses a new energy lithium iron phosphate battery positive electrode material recycling device which comprises a dust collection bin, a channel, an air exhaust fan and a filter screen cylinder. According to the new energy lithium iron phosphate battery positive electrode material recycling device, a dust collection bin is arranged at the bottom, corresponding to the lower portion of each treatment mechanism, of the shell, inclined guide plates are fixedly connected to the bottoms of the treatment bins, exhaust pipes are fixedly connected to the sides, away from a channel, of the dust collection bins, and exhaust fans are installed in the exhaust pipes; a filter screen cylinder covering the end of the exhaust pipe is arranged in each dust collection bin, the dust collection bins are arranged at the bottom of the shell and correspond to the lower portions of the treatment mechanisms, materials generated by polishing under the action of gravity enter the dust collection bins through the inclined guide plates and the channels to be collected, and meanwhile negative pressure suction is conducted through the exhaust pipe in cooperation with the exhaust fan. And fine particle materials generated by polishing are sucked into the dust collection bin, so that the problems that the environment is influenced and waste is caused by flying dust diffusion are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery cathode material recycling technology, specifically a device for recycling and utilizing cathode materials of new energy lithium iron phosphate batteries. Background Technology

[0002] Currently, there are two main methods for recycling spent lithium iron phosphate batteries: physical and chemical methods. Physical recycling involves manual dismantling as a pretreatment process, crushing the spent positive electrodes, and then using different sorting methods to separate the materials and recover resources. This process is simple and easy to implement, with no secondary pollution, but it consumes a lot of energy and has a low recovery rate. Furthermore, the physical separation products tend to contain more impurities and are mainly used as low-value raw materials. Chemical methods, such as roasting and acid leaching, directly separate and purify the lithium, aluminum, and iron metals in the positive electrode material to obtain basic chemical raw materials. Alternatively, by removing impurities and replenishing the lost and ineffective lithium ions, LiFePO4 positive electrode material can be re-prepared. Chemical methods can effectively recycle spent lithium iron phosphate batteries and obtain high-value materials, but the process is more complex, costly, and technically challenging. The toxic byproducts of the reaction are difficult to control, causing serious environmental pollution.

[0003] Patent document CN112894578A discloses a recycling device for positive electrode materials of new energy lithium iron phosphate batteries, including a collection box. A fixed plate is fixedly connected inside the collection box, and at least four sets of rotating units are arranged on the top of the fixed plate. Each set of rotating units includes a first rotating component and a second rotating component. Each first rotating component includes at least four first rotating rollers, and each second rotating component includes at least four second rotating rollers. This invention uses a concave longitudinal section for the first rotating rollers and a convex longitudinal section for the second rotating rollers, allowing aluminum foil to be pressed into an arc shape. The arc-shaped aluminum foil effectively reduces the impact of its own weight, making it less prone to sagging during polishing. It also facilitates better transfer of the aluminum foil between adjacent sets of rotating units, achieving the effect of rolling and transferring the aluminum foil without manual support, thus saving manpower.

[0004] The existing technology can directly grind the positive electrode material of new energy lithium iron phosphate battery on both sides. However, the material ground off during the process falls by gravity and is then collected. The small particles generated during grinding are easy to generate dust, which leads to environmental pollution and material waste. Therefore, a new recycling device for positive electrode material of new energy lithium iron phosphate battery is proposed to optimize the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a device for recycling positive electrode materials of new energy lithium iron phosphate batteries, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for recycling positive electrode materials of new energy lithium iron phosphate batteries includes a shell, a processing chamber inside the shell, a transmission chamber above the processing chamber, multiple processing mechanisms arranged at equal intervals inside the processing chamber, a dust collection chamber below each processing mechanism at the bottom of the shell, an inclined guide plate fixedly connected to the bottom of the processing chamber, a channel communicating with the dust collection chamber at the bottom of the inclined guide plate, an exhaust pipe fixedly connected to the side of the dust collection chamber away from the channel, an exhaust fan installed in the exhaust pipe, and a filter screen covering the end of the exhaust pipe inside the dust collection chamber.

[0008] As a further embodiment of this utility model: a dust collection port is provided at one end of the channel corresponding to the dust collection chamber, and a cover plate adapted to the dust collection port is provided on the outside of the dust collection port. The cover plate is fixedly installed to the housing by bolts, and a round hole for the bolt to pass through is provided on the cover plate. A threaded hole for the bolt to be inserted and threaded connection is provided on the housing.

[0009] As a further embodiment of this utility model: a scraper adapted to the dust collection chamber is slidably connected inside the dust collection chamber, an external threaded joint is fixedly connected through the scraper, and an internal threaded joint is fixedly connected at the opening of the filter screen cylinder, with the internal threaded joint threadedly connected to the external threaded joint.

[0010] As a further improvement of this utility model: a pull rod is fixedly connected to the scraper, and the scraper can be pulled to slide within the dust collection chamber by the pull rod.

[0011] As a further embodiment of this utility model: the processing mechanism includes a first grinding roller and a second grinding roller that are adapted to each other. A rotating shaft is rotatably connected inside both the first grinding roller and the second grinding roller. The first grinding roller, the second grinding roller and the corresponding rotating shaft are all inserted into the transmission chamber and connected to a drive mechanism. A striking mechanism is provided between the rotating shaft and the inner wall of the first grinding roller and the second grinding roller.

[0012] As a further embodiment of this utility model: the driving mechanism includes a motor, a drive shaft, a first gear, a second gear, a third gear, and a fourth gear. The motor is fixedly mounted on the top surface of the housing. The drive shaft is rotatably connected in the transmission chamber. The first gear and the second gear are fixedly connected to the drive shaft. The third gear is fixedly connected to the rotating shaft. The fourth gear is fixedly connected to the corresponding first or second grinding roller. The first gear meshes with the third gear for transmission, and the second gear meshes with the fourth gear for transmission. The transmission ratio of the first gear and the third gear is different from that of the second gear and the fourth gear.

[0013] As a further embodiment of this utility model: the striking mechanism includes a striking head, a protrusion, a sleeve, a piston rod, a piston block, and a spring. The striking head is fixedly connected to the front end of the piston rod, the piston block is fixedly connected to the rear end of the piston rod, the piston block is slidably connected to the inner side of the sleeve, the piston block is confined within the sleeve, the piston rod slides through the sleeve, the protrusion is fixedly connected to the inner wall of the corresponding first or second grinding roller and corresponds to the striking head, and the spring is disposed between the piston block and the inner wall of the sleeve.

[0014] As a further improvement of this utility model, both the exhaust fan and the motor are externally connected to a power supply and a switch.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model has a dust collection chamber set at the bottom of the shell for each processing mechanism. Under the action of gravity, the material generated by grinding enters the dust collection chamber through the inclined guide plate and channel and is collected. At the same time, the exhaust pipe and the exhaust fan work together to perform negative pressure suction, so that the fine particles generated by grinding are sucked into the dust collection chamber and then filtered by the filter screen and retained in the dust collection chamber, thereby effectively avoiding the problem of dust diffusion affecting the environment and causing waste.

[0017] 2. In this utility model, the scraper can slide inside the dust collection bin and can be easily pulled by the pull rod, thereby scraping the polished material collected in the dust collection bin toward the dust removal port, thus facilitating collection and removal.

[0018] 3. In this utility model, the filter screen cylinder is assembled and connected to the scraper through the cooperation of internal threaded joints and external threaded joints, so that the filter screen cylinder can be easily disassembled, replaced and maintained. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a device for recycling positive electrode materials of a new energy lithium iron phosphate battery.

[0020] Figure 2 This is a cross-sectional view of a device for recycling positive electrode materials of a new energy lithium iron phosphate battery.

[0021] Figure 3 This is an enlarged view of component A in a recycling device for positive electrode materials of a new energy lithium iron phosphate battery.

[0022] Figure 4 This is an enlarged view of B in a recycling device for positive electrode materials of a new energy lithium iron phosphate battery.

[0023] Figure 5 This is an enlarged view of C in a new energy lithium iron phosphate battery cathode material recycling device.

[0024] In the diagram: 1. Shell; 2. Processing chamber; 3. Transmission chamber; 4. Processing mechanism; 5. Dust collection chamber; 6. Inclined guide plate; 7. Channel; 8. Exhaust pipe; 9. Exhaust fan; 10. Filter screen; 11. Ash collection port; 12. Cover plate; 13. Scraper; 14. External threaded joint; 15. Internal threaded joint; 16. Pull rod; 17. First grinding roller; 18. Second grinding roller; 19. Rotating shaft; 20. Drive mechanism; 21. Striking mechanism; 22. Motor; 23. Drive shaft; 24. First gear; 25. Second gear; 26. Third gear; 27. Fourth gear; 28. Striking head; 29. ​​Protrusion; 30. Sleeve; 31. Piston rod; 32. Piston block; 33. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 In this embodiment of the present invention, a new energy lithium iron phosphate battery cathode material recycling device includes a housing 1, a processing chamber 2 inside the housing 1, a transmission chamber 3 above the processing chamber 2 on the housing 1, a plurality of processing mechanisms 4 are arranged at equal intervals inside the processing chamber 2, a dust collection chamber 5 is provided below each processing mechanism 4 at the bottom of the housing 1, an inclined guide plate 6 is fixedly connected to the bottom of the processing chamber 2, a channel 7 communicating with the dust collection chamber 5 is provided at the bottom of the inclined guide plate 6, an exhaust pipe 8 is fixedly connected to the side of the dust collection chamber 5 away from the channel 7, an exhaust fan 9 is installed inside the exhaust pipe 8, and a filter screen 10 covering the end of the exhaust pipe 8 is provided inside the dust collection chamber 5.

[0027] A dust collection chamber 5 is set below each processing mechanism 4 at the bottom of the housing 1. Under the action of gravity, the material generated by grinding enters the dust collection chamber 5 through the inclined guide plate 6 and the channel 7 and is collected. At the same time, the exhaust pipe 8 and the exhaust fan 9 work together to perform negative pressure suction, so that the fine particles generated by grinding are sucked into the dust collection chamber 5 and then filtered by the filter screen 10 and left in the dust collection chamber 5, thereby effectively avoiding the problem of dust diffusion affecting the environment and causing waste.

[0028] The dust collection bin 5 has a dust collection port 11 at one end of the channel 7. The outer side of the dust collection port 11 is provided with a cover plate 12 that is compatible with it. The cover plate 12 is fixedly installed to the housing 1 by bolts. The cover plate 12 has a round hole for the bolt to pass through. The housing 1 has a threaded hole for the bolt to be inserted and threaded.

[0029] A scraper 13 is slidably connected inside the dust collection chamber 5, and an external threaded connector 14 is fixedly connected through the scraper 13. An internal threaded connector 15 is fixedly connected to the opening of the filter screen cylinder 10, and the internal threaded connector 15 is threadedly connected to the external threaded connector 14.

[0030] A pull rod 16 is fixedly connected to the scraper 13, and the scraper 13 can be pulled to slide within the dust collection chamber 5 by the pull rod 16.

[0031] The scraper 13 can slide inside the dust collection chamber 5 and can be easily pulled by the pull rod 16, so that the grinding material collected in the dust collection chamber 5 can be scraped towards the dust collection port 11 for easy collection and removal.

[0032] The filter screen cylinder 10 is assembled and connected to the scraper 13 through the mating of the internal threaded joint 15 and the external threaded joint 14, so that the filter screen cylinder 10 can be easily disassembled, replaced and maintained.

[0033] The processing mechanism 4 includes a first grinding roller 17 and a second grinding roller 18 that are adapted to each other. A rotating shaft 19 is rotatably connected inside the first grinding roller 17 and the second grinding roller 18. The first grinding roller 17, the second grinding roller 18 and the corresponding rotating shaft 19 are all inserted into the transmission chamber 3 and connected to a drive mechanism 20. A striking mechanism 21 is provided on the inner wall of the rotating shaft 19 and the first grinding roller 17 and the second grinding roller 18.

[0034] The drive mechanism 20 includes a motor 22, a drive shaft 23, a first gear 24, a second gear 25, a third gear 26, and a fourth gear 27. The motor 22 is fixedly mounted on the top surface of the housing 1. The drive shaft 23 is rotatably connected to the transmission chamber 3. The first gear 24 and the second gear 25 are fixedly connected to the drive shaft 23. The third gear 26 is fixedly connected to the rotating shaft 19. The fourth gear 27 is fixedly connected to the corresponding first grinding roller 17 or second grinding roller 18. The first gear 24 meshes with the third gear 26, and the second gear 25 meshes with the fourth gear 27. The transmission ratio of the first gear 24 and the third gear 26 is different from that of the second gear 25 and the fourth gear 27.

[0035] The striking mechanism 21 includes a striking head 28, a protrusion 29, a sleeve 30, a piston rod 31, a piston block 32, and a spring 33. The striking head 28 is fixedly connected to the front end of the piston rod 31, the piston block 32 is fixedly connected to the rear end of the piston rod 31, the piston block 32 is slidably connected to the inner side of the sleeve 30, and the piston block 32 is confined within the sleeve 30. The piston rod 31 slides through the sleeve 30. The protrusion 29 is fixedly connected to the inner wall of the corresponding first grinding roller 17 or second grinding roller 18 and corresponds to the striking head 28. The spring 33 is disposed between the piston block 32 and the inner wall of the sleeve 30.

[0036] The drive mechanism 20 is driven by the motor 22, which can simultaneously drive the grinding roller and the rotating shaft 19 to rotate at different speeds. In this way, the two sides of the positive electrode material of the new energy lithium iron phosphate battery can be ground by the cooperation of the first grinding roller 17 and the second grinding roller 18, thereby recycling the material. At the same time, the grinding residue on the first grinding roller 17 and the second grinding roller 18 can be knocked off by the tapping head 28 to tap the protrusion 29.

[0037] Both the exhaust fan 9 and the motor 22 are externally connected to a power supply and a switch.

[0038] The working principle of this utility model is as follows:

[0039] In use, the exhaust fan 9 and motor 22 are started. Motor 22 drives drive shaft 23 to rotate, which in turn drives first gear 24 and second gear 25 to rotate. At this time, first gear 24 drives rotating shaft 19 to rotate through third gear 26. Second gear 25 and fourth gear 27 cooperate to drive first grinding roller 17 and second grinding roller 18 to rotate, thereby performing grinding. At the same time, rotating shaft 19 drives the striking head 28 on striking mechanism 21 to rotate. The striking head 28 strikes protrusion 29 to create a striking effect, causing grinding residue on first grinding roller 17 and second grinding roller 18 to fall off. The grinding-generated collected material falls onto inclined guide plate 6 and slides down. The material falls into the dust collection chamber 5 through channel 7 and is collected. Further extraction is performed by the exhaust fan 9, continuously drawing air out of the casing 1. The extracted air is filtered through the filter cylinder 10, isolating the material within the dust collection chamber 5. This completes the recycling of the positive electrode material from the new energy lithium iron phosphate battery. The recycled positive electrode material is continuously fed into the processing mechanism 4 between the first grinding roller 17 and the second grinding roller 18 for grinding. After a period of processing, the cover plate 12 can be removed, and the scraper 13 can be moved by the pull rod 16 to push the grinding material collected in the dust collection chamber 5 to the ash removal port 11 for easy ash removal. Simultaneously, the filter cylinder 10 can be screwed down to unscrew the internal threaded connector 15 from the external threaded connector 14, allowing for easy disassembly of the filter cylinder 10.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for recycling positive electrode materials of new energy lithium iron phosphate batteries, comprising a shell (1), characterized in that: The housing (1) has a processing chamber (2) inside, and a transmission chamber (3) is provided above the processing chamber (2) on the housing (1). Multiple processing mechanisms (4) are arranged at equal intervals inside the processing chamber (2). A dust collection chamber (5) is provided below each processing mechanism (4) at the bottom of the housing (1). An inclined guide plate (6) is fixedly connected to the bottom of the processing chamber (2). A channel (7) communicating with the dust collection chamber (5) is provided at the bottom of the inclined guide plate (6). The dust collection chamber (5) is located far from... An exhaust pipe (8) is fixedly connected to one side of the channel (7). An exhaust fan (9) is installed inside the exhaust pipe (8). A filter screen (10) covering the end of the exhaust pipe (8) is provided in the dust collection bin (5). The processing mechanism (4) includes a first grinding roller (17) and a second grinding roller (18) that are adapted to each other. A rotating shaft (19) is rotatably connected inside both the first grinding roller (17) and the second grinding roller (18). 8) and the corresponding rotating shaft (19) are inserted into the transmission chamber (3) and connected to the drive mechanism (20). The rotating shaft (19) and the inner wall of the first grinding roller (17) and the second grinding roller (18) are provided with a striking mechanism (21). The drive mechanism (20) includes a motor (22), a drive shaft (23), a first gear (24), a second gear (25), a third gear (26) and a fourth gear (27). The motor (22) is fixedly installed on the top surface of the housing (1). The drive shaft (23) is rotatably connected in the transmission chamber (3). The first gear (24) and the second gear (25) are fixedly connected to the drive shaft (23). The third gear (26) is fixedly connected to the rotating shaft (19). The fourth gear (27) is fixedly connected to the corresponding first grinding roller (17) or second grinding roller (18). The first gear (24) meshes with the third gear (26) for transmission, and the second gear (25) meshes with the fourth gear (27) for transmission.

2. The device for recycling positive electrode materials of new energy lithium iron phosphate batteries according to claim 1, characterized in that: The dust collection chamber (5) has a dust collection port (11) at one end of the channel (7). A cover plate (12) is provided on the outside of the dust collection port (11) to match it. The cover plate (12) is fixedly installed to the shell (1) by bolts.

3. The device for recycling positive electrode materials of new energy lithium iron phosphate batteries according to claim 1, characterized in that: The dust collection chamber (5) is slidably connected to a scraper (13) that is compatible with it. An external threaded connector (14) is fixedly connected through the scraper (13). An internal threaded connector (15) is fixedly connected to the opening of the filter cylinder (10). The internal threaded connector (15) is threadedly connected to the external threaded connector (14).

4. The device for recycling positive electrode materials of new energy lithium iron phosphate batteries according to claim 3, characterized in that: A pull rod (16) is fixedly connected to the scraper (13).

5. The device for recycling positive electrode materials of new energy lithium iron phosphate batteries according to claim 1, characterized in that: The striking mechanism (21) includes a striking head (28), a protrusion (29), a sleeve (30), a piston rod (31), a piston block (32), and a spring (33). The striking head (28) is fixedly connected to the front end of the piston rod (31), the piston block (32) is fixedly connected to the rear end of the piston rod (31), the piston block (32) is slidably connected to the inner side of the sleeve (30), the piston rod (31) slides through the sleeve (30), the protrusion (29) is fixedly connected to the inner wall of the corresponding first grinding roller (17) or second grinding roller (18) and corresponds to the striking head (28), and the spring (33) is disposed between the piston block (32) and the inner wall of the sleeve (30).

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