Cobalt recovery device of lithium iron phosphate battery
By designing a cobalt recovery device including a metal separation mechanism and an electrodeposition collection structure, the problem of difficult cobalt metal in lithium iron phosphate batteries is solved, and efficient recycling and utilization of cobalt metal is achieved.
Patent Information
- Application Number
- CN202421512195.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The prior art cannot effectively separate the cobalt metal in lithium iron phosphate batteries alone, resulting in low cobalt recycling rate and small recycling amount.
A cobalt recovery device including a metal separation mechanism and an electrodeposition collection structure is designed. Through the coordination of the rotating cylinder and the ring gear, the initial separation of cobalt metal is performed using the ferrous thiobacterium oxide solution, and the extraction of cobalt metal is completed by electrodeposition collection structure.
It realizes efficient preliminary separation and extraction of cobalt metal, improves the utilization rate and recycling amount of cobalt recycling, and solves the problem of cobalt metal recycling.
Smart Images
Figure CN222838892U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of metal recovery, and in particular to a cobalt recovery device for lithium iron phosphate batteries. Background Art
[0002] Waste lithium-ion batteries have significant resource value. They contain a large amount of valuable metals, of which cobalt accounts for about 15%. As a strategic gold, it is the most economically profitable metal element in waste lithium-ion batteries, and its potential value accounts for about 82.40% of the entire battery. If lithium-ion batteries are not recycled, they will pollute the surrounding environment and thus damage the surrounding ecology.
[0003] At present, when lithium iron phosphate batteries are recycled, it is impossible to separate the cobalt metal in time, which makes it inconvenient for the subsequent recycling of the cobalt metal. As a result, multiple metals are mixed together, resulting in low utilization rate and small recycling volume, which makes the remaining resources of discarded lithium-ion batteries less developed. Utility Model Content
[0004] In order to solve the problem that cobalt metal cannot be separated alone, the present application provides a cobalt recovery device for lithium iron phosphate batteries.
[0005] The cobalt recovery device for lithium iron phosphate batteries provided in this application adopts the following technical solution:
[0006] A cobalt recovery device for lithium iron phosphate batteries, comprising a device bottom plate, a plurality of vertical plates fixedly connected to the top of the device bottom plate, a support plate fixedly connected to the top of the vertical plate, a metal separation mechanism arranged in the middle of the support plate, and an electrodeposition collection structure arranged on the top of the device bottom plate;
[0007] The metal separation mechanism comprises a rotating cylinder that movably penetrates the middle of the supporting plate, and a limiting disc is fixedly connected to the outer wall of the rotating cylinder, and the bottom of the limiting disc is fitted with the top of the supporting plate.
[0008] The electrodeposition collection structure comprises a limiting vertical plate fixedly connected to the top of the device bottom plate, a collecting trough is slidably connected between the two limiting vertical plates, and the bottom of the collecting trough is in contact with the top of the device bottom plate.
[0009] By adopting the above technical solution, the cobalt metal in the battery is initially separated using a metal separation mechanism, and then extracted using an electrodeposition collection structure.
[0010] Preferably, the rotating cylinder passes through the outer wall of the lower half of the support plate and is fixedly connected to a gear ring, the side wall of the gear ring is meshingly connected to a worm, both ends of the worm are movably passed through the side wall of the vertical plate, and the worm passes through one side end of the vertical plate and is fixedly connected to a drive ring.
[0011] By adopting the above technical solution, it is convenient to drive the gear ring to move through the worm, so as to carry out structural operation.
[0012] Preferably, the inner wall of the rotating cylinder is slidably connected to the loading cylinder, a leakage hole is opened through the bottom of the loading cylinder, a handle is fixedly connected to the top of the loading cylinder, a grip is fixedly connected to the top of the driving ring, the bottom of the rotating cylinder is rotatably connected to a liquid outlet pipe, a rotating shaft movably penetrates the side wall of the liquid outlet pipe, and the rotating shaft is located at a section of the side wall inside the liquid outlet pipe and is fixedly connected to a blade.
[0013] By adopting the above technical solution, the driving ring can be driven to rotate by the handle, and it is convenient for the staff to drive.
[0014] Preferably, a fixed bracket is fixedly connected to the outer wall of the liquid outlet pipe, and the fixed bracket is fixedly connected to the vertical plate side walls on both sides away from the liquid outlet pipe. The rotating shaft passes through one end outside the side wall of the liquid outlet pipe and is fixedly connected to a driving disk.
[0015] By adopting the above technical solution, the liquid extraction pipe is fixedly connected to the vertical plate by connecting the fixed bracket to the vertical plate.
[0016] Preferably, a control block is fixedly connected to the top of the driving disk, a limiting plate 1 is fixedly connected to the outer wall of the liquid outlet pipe, a limiting plate 2 is fixedly connected to the outer wall of the liquid outlet pipe, and a clamping block is fixedly connected to the top of the limiting plate 2.
[0017] By adopting the above technical solution, the rotation of the rotating shaft is controlled through the liquid outlet pipe, thereby limiting the position of the rotating shaft.
[0018] Preferably, a rotating support is fixedly connected to the side wall of the control block, a clamping frame is rotatably connected to the middle of the rotating support, and the clamping frame is clamped with the clamping block.
[0019] By adopting the above technical solution, the control block is locked by the clamping block and the clamping frame to prevent the control block from rotating by itself.
[0020] Preferably, a positive electrode block is fixedly connected through one side of the collecting tank, a positive electrode connecting wire is fixedly connected to the side of the positive electrode block away from the collecting tank, and a positive electrode connecting fixture is fixedly connected to one end of the positive electrode connecting wire away from the positive electrode block.
[0021] By adopting the above technical solution, the collecting tank can be connected to the positive line of the external power supply, so as to facilitate the subsequent deposition work.
[0022] Preferably, a negative electrode block is fixedly connected through the other side of the collecting tank, a negative electrode connecting wire is fixedly connected to one end of the negative electrode block away from the collecting tank, and a negative electrode connecting fixture is fixedly connected to one end of the negative electrode connecting wire away from the negative electrode block.
[0023] By adopting the above technical solution, the collecting tank can also be connected to the negative electrode line of the external power supply, so that a complete electrical circuit is formed as a whole.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] 1. The worm drives the gear ring to rotate so that the cobalt metal in the lithium battery in the charging barrel is perfectly released and dissolved in the liquid. Then the rotating control block drives the blade to rotate to separate the liquid from the battery, thereby completing the preliminary separation of the cobalt metal;
[0026] 2. Use the positive electrode connection fixture and the negative electrode connection fixture to connect the positive and negative electrodes of the external power supply respectively so that the solution in the collection tank is energized. Then the cobalt metal will gradually accumulate on the outer surface of the negative electrode block. When it accumulates to a certain extent, turn off the power supply, then take out the negative electrode block and collect the cobalt metal on the surface of the negative electrode block, thereby completing the recovery of cobalt metal. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is an overall display diagram of the cobalt recovery device for lithium iron phosphate batteries in this application;
[0028] Figure 2 This is a partial display diagram of the charging barrel of the cobalt recovery device for lithium iron phosphate batteries of the present application;
[0029] Figure 3 This is a partial display diagram of the gear ring of the cobalt recovery device for the lithium iron phosphate battery of this application;
[0030] Figure 4 This is a partial display diagram of the liquid outlet pipe of the cobalt recovery device of the lithium iron phosphate battery of this application;
[0031] Figure 5 Cobalt recovery device for lithium iron phosphate battery Figure 4 The enlarged view of point A in the middle;
[0032] Figure 6 This is a cross-sectional view of the blades of the cobalt recovery device for the lithium iron phosphate battery of this application;
[0033] Figure 7 This is a partial display diagram of the electroplating collection structure of the cobalt recovery device for the lithium iron phosphate battery of the present application.
[0034] Reference numerals: 1, device bottom plate; 11, vertical plate; 12, support plate;
[0035] 2. Metal separation mechanism; 21. Rotating cylinder; 22. Limiting disc; 23. Loading cylinder; 24. Leakage hole; 25. Handle; 26. Gear ring; 27. Worm; 28. Driving ring; 29. Grip; 210. Liquid outlet pipe; 211. Rotating shaft; 212. Blade; 213. Fixed bracket; 214. Driving disc; 215. Control block; 216. Limiting plate 1; 217. Limiting plate 2; 218. Block; 219. Rotating support; 220. Snap-on frame;
[0036] 3. Electrodeposition collection structure; 31. Positioning vertical plate; 32. Collection tank; 33. Positive electrode block; 34. Positive electrode connecting wire; 35. Positive electrode connecting fixture; 36. Negative electrode block; 37. Negative electrode connecting wire; 38. Negative electrode connecting fixture. DETAILED DESCRIPTION
[0037] The following is combined with Figure 1-7 This application is described in further detail.
[0038] The embodiment of the present application discloses a cobalt recovery device for a lithium iron phosphate battery.
[0039] Example 1
[0040] Reference Figure 1 A cobalt recovery device for lithium iron phosphate batteries includes a device bottom plate 1, the top of the device bottom plate 1 is fixedly connected to the bottom of multiple vertical plates 11, the top of the vertical plate 11 is fixedly connected to the bottom of a support plate 12, a circular through hole is opened in the middle of the support plate 12, a metal separation mechanism 2 is arranged in the middle of the support plate 12, and an electrodeposition collection structure 3 is arranged on the top of the device bottom plate 1.
[0041] Through the above settings, the staff placed the bottom plate 1 of the device horizontally and prepared the Thiobacillus ferrooxidans solution at the same time, ready to carry out the cobalt metal separation work.
[0042] Reference Figure 2, 3. The metal separation mechanism 2 includes a rotating cylinder 21 that movably passes through the circular through hole in the middle of the support plate 12, and a circular through hole is opened in the middle of the limiting disc 22. The outer wall of the rotating cylinder 21 is fixedly connected to the circular through hole opened in the middle of the limiting disc 22, so that the rotating cylinder 21 is fixedly connected to the limiting disc 22, and the bottom of the limiting disc 22 is in contact with the top of the support plate 12, thereby limiting the rotating cylinder 21, and the inner wall of the rotating cylinder 21 is in contact with the outer wall of the loading cylinder 23. The top of the loading cylinder 23 is fixedly connected to the bottom of the handle 25, so as to facilitate the vertical lifting of the loading cylinder 23. A circular through hole is penetrated through the top of the gear ring 26. The rotating cylinder 21 penetrates the outer wall of the lower half of the supporting plate 12 and penetrates the top of the gear ring 26 to form a circular through hole, so that the rotating cylinder 21 is fixedly connected to the gear ring 26. The teeth of the side wall of the gear ring 26 are engaged with the threads formed on the side wall of the worm 27. A circular through hole is formed on the side wall of the vertical plate 11. Both ends of the worm 27 are movable through the circular through holes formed on the side wall of the vertical plate 11, so that the worm 27 is limited by the vertical plate 11. One end of the worm 27 penetrates the circular through hole formed on the side wall of the vertical plate 11 and penetrates the side wall of the driving ring 28, so that the worm 27 is fixedly connected to the driving ring 28. The top of the driving ring 28 is fixedly connected to the connecting end of the handle 29.
[0043] Through the above arrangement, the staff places the pre-treated battery in the charging barrel 23, then slides the charging barrel 23 and the rotating barrel 21, then pours the solution of Thiobacillus ferrooxidans into the interior of the rotating barrel 21, and then the staff grasps the handle 29 to rotate. The handle 29 will drive the driving ring 28 to rotate, the driving ring 28 will drive the worm 27 to rotate, the worm 27 will drive the gear ring 26 to rotate, and the gear ring 26 will drive the rotating barrel 21 to rotate, so that the solution of Thiobacillus ferrooxidans in the rotating barrel 21 is fully in contact with the battery through continuous rotation, so that the inorganic acid produced by the metabolic activity of Thiobacillus ferrooxidans leaches metal elements from the waste lithium-ion battery. Since the study found that the leaching of cobalt by this kind of bacteria is faster than the leaching of lithium, the main leaching when the metal leaching begins is cobalt metal element.
[0044] Reference Figure 4, 5,6, the bottom of the rotating cylinder 21 is rotatably connected to the top of the liquid outlet pipe 210, and the rotating connection between the rotating cylinder 21 and the liquid outlet pipe 210 is treated with anti-seepage to prevent liquid from leaking out during the rotation process. A circular hole is penetrated through the side wall of the liquid outlet pipe 210, and the rotating shaft 211 movably penetrates the circular hole penetrated through the side wall of the liquid outlet pipe 210, so that the rotating shaft 211 is rotatably connected to the liquid outlet pipe 210, and the rotating connection between the rotating shaft 211 and the liquid outlet pipe 210 is treated with anti-leakage to prevent liquid from leaking out. The rotating shaft 211 is located in a section of the side wall inside the liquid outlet pipe 210 and is fixedly connected to the middle part of the blade 212. The side wall of the blade 212 conflicts with the inner wall of the liquid outlet pipe 210, thereby blocking the liquid. The outer wall of the liquid outlet pipe 210 is fixedly connected to one end of the fixed bracket 213 close to the liquid outlet pipe 210, and the fixed bracket 213 is away from the two sides of the liquid outlet pipe 210 and the vertical plate 11 is fixedly connected to one side of the fixed bracket 213, the rotating shaft 211 passes through one end of the side wall outside the liquid outlet pipe 210, passes through the side wall of the driving disk 214 and is fixedly connected to the driving disk 214, the top of the driving disk 214 is fixedly connected to the bottom of the control block 215, the outer wall of the liquid outlet pipe 210 is fixedly connected to the end of the limiting plate 1 216 close to the liquid outlet pipe 210, the outer wall of the liquid outlet pipe 210 is fixedly connected to the end of the limiting plate 217 close to the liquid outlet pipe 210, the top of the limiting plate 217 is fixedly connected to the bottom of the clamping block 218, the side wall of the control block 215 is fixedly connected to one side of the rotating support 219 close to the control block 215, the middle part of the rotating support 219 is rotatably connected to the end of the clamping frame 220 close to the control block 215, the top of the clamping frame 220 is penetrated with a square through groove, and the square through groove penetrated through the top of the clamping frame 220 is clamped with the clamping block 218, so as to limit.
[0045] Through the above arrangement, when the leaching reaction is completed for a period of time, the staff stops rotating the handle 29, and then rotates the clamping frame 220 to release the clamping frame 220 from the clamping block 218, and then rotates the control block 215 so that the side of the control block 215 away from the rotating support 219 is in contact with the limit plate 216, thereby driving the driving disk 214 to rotate, and the driving disk 214 drives the rotating shaft 211 to rotate, and the rotating shaft 211 will drive the blade 212 to rotate, and the blade 212 will change from a horizontal state to a vertical state, so that the solution containing the cobalt metal element flows from the bottom of the rotating cylinder 21 into the liquid outlet pipe 210, and then flows out from the bottom of the liquid outlet pipe 210, and the battery will be retained in the loading cylinder 23, thereby completing the separation of solid and liquid.
[0046] Reference Figure 7The electrodeposition collection structure 3 includes a limiting vertical plate 31 fixedly connected to the top of the device bottom plate 1, a collection tank 32 is arranged between the two limiting vertical plates 31, and the side walls of the collection tank 32 are fitted with the side walls of the limiting vertical plates 31, so that the limiting vertical plates 31 are slidably connected with the collection tank 32, and the bottom of the collection tank 32 is fitted with the top of the device bottom plate 1, and the positive electrode block 33 passes through one side of the collection tank 32 and is fixedly connected to the collection tank 32, and the side of the positive electrode block 33 away from the collection tank 32 is fixedly connected to the side of the positive electrode connection line 34 close to the collection tank 32 The end of the positive electrode connecting wire 34 away from the positive electrode block 33 is fixedly connected to the end of the positive electrode connecting fixture 35 close to the positive electrode connecting wire 34, so as to facilitate the positive electrode connection. The negative electrode block 36 passes through the other side of the collecting tank 32 and is fixedly connected to the collecting tank 32. The end of the negative electrode block 36 away from the collecting tank 32 is fixedly connected to the end of the negative electrode connecting wire 37 close to the negative electrode block 36. The end of the negative electrode connecting wire 37 away from the negative electrode block 36 is fixedly connected to the end of the negative electrode connecting fixture 38 close to the negative electrode connecting wire 37, so as to facilitate the negative electrode connection.
[0047] Through the above arrangement, when the solution containing cobalt metal elements flows out from the bottom of the liquid outlet pipe 210, the solution containing cobalt metal elements will be collected in the collecting tank 32. At this time, the staff connects the positive electrode connection fixture 35 to the positive electrode of the external power supply, and then connects the negative electrode connection fixture 38 to the negative electrode of the external power supply, thereby forming a complete circuit. Subsequently, the external power supply is started to charge the solution containing cobalt metal elements in the collecting tank 32. Under the influence of voltage, the cobalt metal elements in the solution will gradually gather and adhere to the surface of the negative electrode block 36, thereby completing the electrodeposition work. After the aggregation and attachment reaches a certain degree, the power is turned off to collect the cobalt metal on the surface of the negative electrode block 36.
[0048] The implementation principle of the cobalt recovery device for a lithium iron phosphate battery in an embodiment of the present application is as follows: the ring gear 26 is driven to rotate by the worm 27, so that the Thiobacillus ferrooxidans solution inside the rotating cylinder 21 is fully in contact with the battery to produce a leaching reaction, thereby completing the preliminary extraction of cobalt metal, and then the solution containing the cobalt metal element flows into the collection tank 32 through the liquid outlet pipe 210, and then the collection tank 32 is connected to the positive and negative electrodes of an external power supply, so as to complete the re-extraction of cobalt metal by electrodeposition, thereby completing the recovery and extraction of cobalt metal.
[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A cobalt recovery device for lithium iron phosphate batteries, comprising a device bottom plate (1), a plurality of vertical plates (11) are fixedly connected to the top of the device bottom plate (1), a support plate (12) is fixedly connected to the top of the vertical plate (11), and the characteristics are: A metal separation mechanism (2) is arranged in the middle of the support plate (12), and an electrodeposition collection structure (3) is arranged on the top of the device bottom plate (1); The metal separation mechanism (2) comprises a rotating cylinder (21) that movably passes through the middle of the support plate (12); a limiting disc (22) is fixedly connected to the outer wall of the rotating cylinder (21); and the bottom of the limiting disc (22) is in contact with the top of the support plate (12); The electrodeposition collection structure (3) comprises a limiting vertical plate (31) fixedly connected to the top of the device bottom plate (1), a collection trough (32) is slidably connected between the two limiting vertical plates (31), and the bottom of the collection trough (32) is in contact with the top of the device bottom plate (1).
2. The cobalt recovery device for lithium iron phosphate battery according to claim 1, characterized in that: The rotating cylinder (21) passes through the outer wall of the lower half of the supporting plate (12) and is fixedly connected to a gear ring (26). The side wall of the gear ring (26) is meshingly connected to a worm (27). Both ends of the worm (27) movably pass through the side wall of the vertical plate (11). The end portion of the worm (27) passes through one side of the vertical plate (11) and is fixedly connected to a driving ring (28).
3. The cobalt recovery device for lithium iron phosphate battery according to claim 2, characterized in that: The inner wall of the rotating cylinder (21) is slidably connected to a loading cylinder (23), a leakage hole (24) is formed through the bottom of the loading cylinder (23), a handle (25) is fixedly connected to the top of the loading cylinder (23), a grip (29) is fixedly connected to the top of the driving ring (28), a liquid outlet pipe (210) is rotatably connected to the bottom of the rotating cylinder (21), a rotating shaft (211) movably penetrates the side wall of the liquid outlet pipe (210), and a blade (212) is fixedly connected to a section of the side wall of the liquid outlet pipe (210).
4. The cobalt recovery device for lithium iron phosphate battery according to claim 3, characterized in that: The outer wall of the liquid outlet pipe (210) is fixedly connected to a fixed bracket (213), and the fixed bracket (213) is fixedly connected to the side walls of the vertical plate (11) at two sides away from the liquid outlet pipe (210). The rotating shaft (211) passes through one end portion outside the side wall of the liquid outlet pipe (210) and is fixedly connected to a driving disk (214).
5. The cobalt recovery device for lithium iron phosphate battery according to claim 4, characterized in that: The top of the driving disk (214) is fixedly connected to a control block (215); the outer wall of the liquid outlet pipe (210) is fixedly connected to a first limiting plate (216); the outer wall of the liquid outlet pipe (210) is fixedly connected to a second limiting plate (217); and the top of the second limiting plate (217) is fixedly connected to a clamping block (218).
6. The cobalt recovery device for lithium iron phosphate battery according to claim 5, characterized in that: The side wall of the control block (215) is fixedly connected with a rotating support (219), the middle part of the rotating support (219) is rotatably connected with a clamping frame (220), and the clamping frame (220) is clamped with the clamping block (218).
7. The cobalt recovery device for lithium iron phosphate battery according to claim 1, characterized in that: A positive electrode block (33) is fixedly connected to one side of the collecting tank (32), a positive electrode connection line (34) is fixedly connected to the side of the positive electrode block (33) away from the collecting tank (32), and a positive electrode connection fixture (35) is fixedly connected to one end of the positive electrode connection line (34) away from the positive electrode block (33).
8. The cobalt recovery device for lithium iron phosphate battery according to claim 1, characterized in that: A negative electrode block (36) is fixedly connected to the other side of the collecting tank (32), an end of the negative electrode block (36) away from the collecting tank (32) is fixedly connected to a negative electrode connecting wire (37), and an end of the negative electrode connecting wire (37) away from the negative electrode block (36) is fixedly connected to a negative electrode connecting fixture (38).