A waste manganese iron phosphate lithium battery recycling equipment

Abstract

The present invention relates to the field of waste lithium battery recycling, and in particular to a waste manganese iron phosphate lithium battery recycling device, comprising a mounting frame, a placement frame, a connecting column, and a water guide plate, etc.; the mounting frame is connected to a plurality of pulling ropes via a winding mechanism; all the pulling ropes are connected to at least three placement frames, and all the placement frames are arranged vertically from top to bottom; at least four connecting columns are fixedly connected to the bottom of each placement frame; and all the connecting columns at the bottom of the same placement frame are slidably connected to a water guide plate. Based on reducing the amount of lithium battery accumulation by at least three placement frames, the present invention guides the solution during the drying process and enhances the flow of the solution during the soaking process by using a water guide plate and an expansion plate. Compared with the soaking rack in the prior art, while achieving multiple functions, the overall structure is ingenious and low-cost, and is achieved only by the retracting and extending action of the pulling ropes, and has extremely high application value.

Description

Technical Field

[0001] The present invention relates to the field of waste lithium battery recycling, and in particular to a waste manganese iron phosphate lithium battery recycling device. Background Art

[0002] The pretreatment for recycling of waste lithium manganese iron phosphate batteries first requires discharging the old batteries. Conventional discharge methods include puncture discharge and salt water immersion discharge. Among them, salt water immersion discharge has low cost and is suitable for industrial batch processing. However, in actual operation, the accumulation of old batteries can easily lead to insufficient solution permeability. Some batteries cannot fully contact the solution, resulting in residual charge. In subsequent crushing processes, charged batteries are prone to sparks and explosions, which can damage equipment and affect the process. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing salt water immersion discharge process, in which the accumulation of old batteries easily leads to insufficient solution permeability, some batteries cannot fully contact the solution, and thus cause residual charge, the present invention provides a waste manganese iron phosphate lithium battery recycling equipment.

[0004] The technical implementation scheme of the present invention is: a waste manganese iron phosphate lithium battery recycling equipment, including a mounting frame; the mounting frame is connected to a plurality of pulling ropes through a winding mechanism; a soaking bucket is set on the ground; it also includes a placement frame, a connecting column, a water diversion plate and an expansion plate; all the pulling ropes are connected to at least three placement frames, and all the placement frames are arranged vertically from top to bottom; each placement frame is fixedly connected to at least four connecting columns at the bottom; all the connecting columns at the bottom of the same placement frame are slidably connected to a water diversion plate; each water diversion plate is fixedly connected to an inclined expansion plate on the left and right sides; the expansion plate on the left is inclined downward, and the expansion plate on the right is inclined upward.

[0005] More preferably, a plurality of push rods are fixedly connected to the water guide plate; and all the push rods are aligned with the through grooves on the bottom surface of the placement frame.

[0006] More preferably, the top end of the push rod is in the shape of a truncated cone.

[0007] More preferably, the left and right lengths of all the water guide plates increase sequentially from bottom to top.

[0008] More preferably, the pulling rope is a 316L stainless steel wire rope.

[0009] More preferably, the expansion plate is a rubber plate, and the side away from the water guide plate is rounded.

[0010] More preferably, a plurality of scraper rings are provided on the mounting frame, the diameter of the pulling rope is consistent with the inner diameter of the scraper ring, and the pulling rope passes through the corresponding scraper ring.

[0011] More preferably, it also includes a closing plate and an elastic member; an elastic member is fixedly connected to all connecting columns; all connecting columns on each placement frame are slidably connected to a closing plate, and the other end of the elastic member provided on the connecting column is fixedly connected to the closing plate; the upper side surface of the closing plate contacts the lower side surface of the adjacent water diversion plate; the closing plate and the adjacent water diversion plate have the same size; a number of drainage grooves 1 are provided on the water diversion plate; a number of drainage grooves 2 are provided on the closing plate; the drainage grooves 2 and the drainage grooves 1 are staggered; a slide groove is provided on each connecting column; a number of sliders are fixedly connected to the water diversion plate; each slider is located in an adjacent slide groove.

[0012] More preferably, all the drainage grooves are arranged in an inclined shape on the left side.

[0013] More preferably, a salt concentration sensor and a water level monitor are provided in the soaking barrel.

[0014] Compared with the existing technology, the present invention has the following advantages: on the basis of reducing the accumulation of lithium batteries through at least three placement frames, the present invention guides the solution during the drying process and improves the flow of the solution during the soaking process through the water guide plate and the expansion plate. Compared with the soaking rack in the existing technology, while realizing multiple functions, the overall structure is ingenious and the cost is low. It is only realized by the retracting and extending action of the pulling rope, and has extremely high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the waste lithium manganese iron phosphate battery recycling equipment of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of a single placement frame of the present invention;

[0017] Figure 3 An exploded view of the water guide plate and closing plate combination of the present invention;

[0018] Figure 4 A cross-sectional view of the water guide plate and the closing plate of the present invention;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of all the placement frames of the present invention placed in the soaking bucket;

[0020] Figure 6 This is a side view of all the placement frames of the present invention placed in a soaking bucket;

[0021] Figure 7 It is a side view of all the placement frames of the present invention in a state of being tilted to the left.

[0022] Among them, the above-mentioned drawings include the following figure marks: 1-mounting frame, 101-winding motor, 102-winding roller, 103-scraper ring, 2-pulling rope, 3-placing frame, 4-connecting column, 401-chute, 5-water guide plate, 501-top rod, 502-drainage trough 1, 503-slider, 6-expansion plate, 7-closing plate, 701-drainage trough 2, 8-elastic part, 9-soaking bucket. DETAILED DESCRIPTION

[0023] First of all, it should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position.

[0024] Example 1

[0025] like Figure 1-Figure 7 As shown, a waste manganese iron phosphate lithium battery recycling device includes a mounting frame 1; the mounting frame 1 is connected to a plurality of pulling ropes 2 through a winding mechanism; the winding mechanism is composed of a winding motor 101 and a winding roller 102, and the winding motor 101 winds or releases the pulling ropes 2 through the winding roller 102; the mounting frame 1 is provided with running wheels; and a soaking bucket 9 is provided on the ground;

[0026] It also includes a placement frame 3, a connecting column 4, a water diversion plate 5 and an extension plate 6; all the pulling ropes 2 are connected to three placement frames 3, and all the placement frames 3 are arranged vertically from top to bottom; a number of through grooves are opened on the side and bottom surfaces of all the placement frames 3; four connecting columns 4 are fixedly connected to the bottom of each placement frame 3; all the connecting columns 4 at the bottom of the same placement frame 3 are slidably connected to a water diversion plate 5; each water diversion plate 5 is fixed to the left and right sides with an inclined extension plate 6; the extension plate 6 on the left is tilted downward to avoid affecting the diversion of the dripping solution, and the extension plate 6 on the right is tilted upward.

[0027] A plurality of push rods 501 are fixedly connected to the water guide plate 5 ; all the push rods 501 are aligned with the through slots on the bottom surface of the placement frame 3 .

[0028] The top end of the push rod 501 is in the shape of a frustum, which is conducive to the push rod 501 penetrating into the lithium battery stack and pushing it.

[0029] The left and right lengths of all the water guide plates 5 increase from bottom to top, so that when the placement frame 3 is tilted to drain and dry, the water guide plates 5 can fully cover the bottom of the corresponding placement frame 3, smoothly guiding the flowing solution to the left.

[0030] The lifting rope 2 is a 316L stainless steel wire rope; it effectively prevents corrosion from salt solutions and increases its service life.

[0031] The expansion plate 6 is a rubber plate, and the side away from the water guide plate 5 is rounded; during the stirring process, the expansion plate 6 touches the inner wall of the soaking barrel 9 and will be deformed to avoid obstruction with the inner wall of the soaking barrel 9 and affect the movement.

[0032] Several scraping rings 103 are provided on the mounting frame 1. The diameter of the pulling rope 2 is consistent with the inner diameter of the scraping ring 103, and the pulling rope 2 passes through the corresponding scraping ring 103; when the pulling rope 2 is wound, the scraping ring 103 scrapes off the salt crystals attached to the surface to prevent the salt crystals from being brought into the winding mechanism and affecting the operation of the winding mechanism.

[0033] The use steps of the present invention are as follows:

[0034] The initial state of the present invention is as follows Figure 1 As shown, first, all the winding motors 101 are controlled to drive the corresponding winding rollers 102 to wind up or release the pulling ropes 2, so that the upper and lower spacings of all the placement frames 3 are increased, and then the used lithium batteries are placed in each placement frame 3 manually or by a robot, and then the pulling ropes 2 are wound up to move all the placement frames 3 upwards until the bottom of the lowest placement frame 3 is higher than the soaking bucket 9, and then the mounting frame 1 is moved to make the placement frame 3 above the soaking bucket 9, and then the pulling ropes 2 are released by the winding motor 101 and the winding roller 102 to move each placement frame 3 down into the soaking bucket 9, and the distance between the bottom of the placement frame 3 and the bottom of the bucket is not less than 15 cm, and then the placement frame 3 is sent to the soaking bucket 9 through an external conveying device. 9, add salt solution, the salt solution covers the top of the uppermost placement frame 3 by more than 15 cm, and wait for the lithium battery to soak in the solution for 6-14 hours (the soaking time here refers to the soaking time of reducing solutions such as sodium sulfide and sodium bisulfide, and the actual soaking time varies according to the type of solution). After the soaking is completed, control the winding roller 102 to reel in the pulling rope 2, and the placement frame 3 carries the lithium battery to separate from the solution. Then, let the present invention stand for 10-15 minutes to dry the placement frame 3 and the lithium battery, and then control the mounting frame 1 to carry the placement frame 3 away from the top of the soaking barrel 9. Then, control the spacing between the placement frames 3 to increase, and manually or mechanically take out the discharged lithium battery to proceed to the next process.

[0035] When using the placement frame 3 to move up and separate from the solution for drying, Figure 6 For reference, the pulling rope 2 on the left side does not move, and the pulling rope 2 on the right side is controlled to continue to reel, so that each placement frame 3, water guide plate 5 and expansion plate 6 tilt to the left, and the solution flowing downward from the placement frame 3 flows onto the water guide plate 5 and the expansion plate 6, and is guided to the left by the water guide plate 5 and the expansion plate 6 to flow downward back into the soaking bucket 9.

[0036] When soaking, Figure 6As shown, the lifting rope 2 on the left is controlled to be released, and the lifting rope 2 on the right is retracted, and then the lifting rope 2 on the left is controlled to be retracted, and the lifting rope 2 on the right is released, so that the placement frame 3, the water guide plate 5 and the expansion plate 6 are repeatedly tilted left and right in the solution to swing, so that the expansion plates 6 tilted on the left and right sides stir the solution in the soaking bucket 9; then the lifting ropes 2 on the left and right sides are restored to the same length, and the placement frame 3 is in a horizontal state, and then all the lifting ropes 2 are controlled to shrink synchronously, and then released synchronously, so that the placement frame 3, the water guide plate 5 and the expansion plate 6 move up and down in the solution. When the placement frame 3, the water guide plate 5 and the expansion plate 6 move downward, the solution seeps into the interior from the through grooves at the bottom and sides of the placement frame 3, and when the water guide plate 5 and the expansion plate 6 move downward relative to the solution, the solution pushes the water guide plate 5 and the expansion plate 6 relative to the solution. When the connecting column 4 moves upward, the distance between the water guide plate 5 and the corresponding placement frame 3 becomes smaller, and the water guide plate 5 squeezes the solution above it upward into the corresponding placement frame 3. At the same time, the push rod 501 on the water guide plate 5 will be inserted into the interior of the placement frame 3 from the bottom groove thereof, lifting the lithium battery and turning it over. When the placement frame 3 drops to the lowest point in the soaking barrel 9 and rises, the placement frame 3, the water guide plate 5 and the expansion plate 6 no longer move downward relative to the solution. At this time, the water guide plate 5 and the expansion plate 6 move downward and reset along the connecting column 4 under the action of their own weight. The spacing between the water guide plate 5 and the placement frame 3 returns to its initial size, and the solution is refilled in the spacing space. When the placement frame 3, the water guide plate 5 and the expansion plate 6 rise, the solution rushes into it from the upper opening of the placement frame 3. At this time, the water guide plate 5 is restricted by the connecting column 4 and does not move downward.

[0037] According to the above steps, we know that the present invention has the following effects:

[0038] In the existing immersion discharge operation, a large number of old batteries are directly piled up in the immersion tank. The batteries hinder each other, which easily leads to insufficient solution permeability, resulting in some batteries being unable to fully contact and react with the solution, and then there is residual charge. The present invention uses multiple placement frames 3 to pack lithium batteries, reducing the accumulation of lithium batteries, so that each placement frame 3 can fully contact with the immersion solution, ensuring the discharge efficiency of the lithium batteries. At the same time, it is still suitable for immersion discharge of a large number of lithium batteries at the same time, suitable for large-scale industrial recycling needs, and highly practical.

[0039] In addition, after the immersion is completed and the lithium battery and the placement frame 3 are dried, the placement frames 3 arranged up and down are tilted, and the water guide plate 5 is used to guide the flowing solution back to the immersion pool. The water guide plate 5 prevents the solution flowing down from the upper placement frame 3 from flowing into the lower placement frame 3, causing the lower placement frame 3 to be wetted. The lower placement frame 3 requires a longer drying time, so the drying time of each placement frame 3 arranged up and down is equal, thereby improving the efficiency of continuous operation.

[0040] After long-term static soaking, the salt solution is prone to crystallization and precipitation, resulting in different salt content of solutions at different depths, which in turn leads to different reactions of the lithium batteries in each placement frame 3, affecting the discharge effect. Therefore, during the soaking process, the placement frame 3, the water guide plate 5 and the expansion plate 6 are continuously tilted and swung left and right, so that the inclined expansion plate 6 stirs the solution in the soaking barrel 9 to prevent the salt solution from crystallizing and precipitating, which leads to different reactions of the lithium batteries in each placement frame 3 and affects the discharge effect. The continuous tilting and swinging of the placement frame 3 and the water guide plate 5 is also beneficial to the contact reaction effect between the lithium batteries in the placement frame 3 and the solution. Moreover, when drying, the inclined expansion plate 6 can increase the blocking area of ​​the water guide plate 5, thereby improving the protection effect of the lower placement frame 3.

[0041] Furthermore, when the placement frame 3, the water guide plate 5 and the expansion plate 6 move downward in the solution, the water guide plate 5 and the expansion plate 6 move upward relative to the connecting column 4, and the water guide plate 5 squeezes the solution on its upper side upward into the upper placement frame 3. At the same time, the push rod 501 is inserted into the interior of the placement frame 3 from the bottom groove, lifting the lithium battery and turning it over, further increasing the contact between the solution and the lithium battery, improving the discharge reaction effect, further ensuring the comprehensiveness of the discharge, and preventing some batteries from having residual charge.

[0042] In summary, the present invention, on the basis of reducing the accumulation of lithium batteries by placing the frame 3, guides the solution during the drying process and improves the flow of the solution during the soaking process through the water guide plate 5 and the expansion plate 6. Compared with the soaking rack in the prior art, it realizes multiple functions while having an ingenious overall structure and low cost. It is only realized by the retracting and extending action of the pulling rope 2, and has extremely high application value.

[0043] The additional technical effects of the present invention are as follows:

[0044] When placing frame 3 Figure 7 When the water is drained and dried in the left tilted state as shown, the left side of the lower placement frame 3 will protrude from the upper placement frame 3, as shown in FIG. Figure 6 The left and right lengths of all the water guide plates 5 are set to increase from bottom to top, and the top water guide plate 5 has the largest area, so that the solution flowing down from the placement frame 3 above the water guide plate 5 is further away from the placement frame 3 below when flowing back to the soaking bucket 9 to the lower left, thereby avoiding wetting the placement frame 3 below and the internal lithium battery.

[0045] Example 2: Based on Example 1, Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, it also includes a closing plate 7 and an elastic member 8; all the connecting columns 4 are fixed with an elastic member 8, and the elastic member 8 is a spring; all the connecting columns 4 on each placement frame 3 are slidably connected to a closing plate 7, and the other end of the elastic member 8 provided on the connecting column 4 is fixed to the closing plate 7; the upper side surface of the closing plate 7 is in contact with the lower side surface of the adjacent water diversion plate 5; the closing plate 7 has the same size as the adjacent water diversion plate 5; a plurality of drainage grooves 502 are provided on the water diversion plate 5; a plurality of drainage grooves 2 701 are provided on the closing plate 7; the drainage grooves 2 701 and the drainage grooves 1 502 are staggered; each connecting column 4 is provided with a slide groove 401; at least four sliders 503 are fixed to the water diversion plate 5; each slider 503 is located in an adjacent slide groove 401.

[0046] The left side of all the drainage grooves 502 is arranged in an inclined shape, so that when the water guide plate 5 tilts to the left, the solution remaining in the drainage groove 502 can flow out.

[0047] A salt concentration sensor and a water level monitor are provided in the soaking barrel 9 to promptly remind the user of changes in the concentration of the salt solution and replenish the solution in time.

[0048] The operating steps of this embodiment are as follows:

[0049] When the placement frame 3, the water guide plate 5 and the expansion plate 6 move upward in the solution, the solution entering the placement frame 3 passes downward through the through groove at the bottom thereof, and exerts downward pressure on the closing plate 7 through the drainage groove 1 502, so that the closing plate 7 is separated downward from the water guide plate 5 and the corresponding elastic member 8 is compressed. Then the solution passes through the drainage groove 1 502 into between the closing plate 7 and the water guide plate 5, and then flows downward into the placement frame 3 below through the drainage groove 2 701; when the placement frame 3, the water guide plate 5 and the expansion plate 6 move downward in the solution, the compressed elastic member 8 stretches, pushing the closing plate 7 upward to fit with the water guide plate 5, and disconnecting the drainage groove 1 502 and the drainage groove 2 701. The water guide plate 5 and the closing plate 7 are combined into a "complete guide plate", which squeezes the solution on the upper side of the water guide plate 5 into the placement frame 3 above it.

[0050] During the drying operation, the placement frame 3, the water guide plate 5 and the expansion plate 6 rise from the solution and turn into a left-leaning state. After a large amount of solution in the placement frame 3 flows out downward, it squeezes the closing plate 7 and the elastic member 8 through the drainage groove 502. When a large amount of solution in the placement frame 3 is drained out, the remaining solution is insufficient to maintain the compressed state of the elastic member 8. The elastic member 8 will stretch, pushing the closing plate 7 to fit with the water guide plate 5 again, combining into a "complete guide plate", and guiding the remaining small amount of solution in the placement frame 3 to the lower left, away from the placement frame 3 below.

[0051] According to the above steps, we know that the present invention also has the following effects:

[0052] When the placement frame 3, the water guide plate 5 and the expansion plate 6 move upward in the solution, the water guide plate 5 and the closing plate 7 are separated, and the solution flows into the placement frame 3 below through the drainage groove 1 502 and the drainage groove 2 701, so as to avoid the presence of the water guide plate 5 blocking the solution from rushing into the placement frame 3 from the upper opening, thereby ensuring the reaction effect between the solution and the lithium battery during the upward movement of the placement frame 3. When the placement frame 3, the water guide plate 5 and the expansion plate 6 move downward in the solution, the water guide plate 5 and the closing plate 7 are re-attached to form a "complete guide plate", which squeezes the solution on the upper side of the water guide plate 5 into the placement frame 3 above, thereby increasing the reaction effect between the solution and the lithium battery in the placement frame 3 above.

[0053] It should be understood that the above description is only for illustrative purposes and is not intended to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will fall within the scope of the claims herein.

Claims

1. A waste manganese iron phosphate lithium battery recycling device, comprising a mounting frame (1); the mounting frame (1) is connected to a plurality of pulling ropes (2) through a winding mechanism; a soaking bucket (9) is provided on the ground; and the device is characterized in that: It also includes a placement frame (3), a connecting column (4), a water guide plate (5) and an expansion plate (6); all the pulling ropes (2) are connected to at least three placement frames (3), the pulling ropes (2) are connected to the front and rear sides of the placement frames (3), all the placement frames (3) are arranged vertically from top to bottom, and all the placement frames (3) have a plurality of through grooves on their sides and bottoms; each placement frame (3) is fixedly connected to at least four connecting columns (4) at the bottom; all the connecting columns (4) at the bottom of the same placement frame (3) are slidably connected to a water guide plate (5), all the connecting columns (4) guide the water guide plate (5) to slide along the connecting column (4), and each water guide plate (5) is fixedly connected to an inclined expansion plate (6) on the left and right sides; the expansion plate (6) on the left is inclined downward, and the expansion plate (6) on the right is inclined upward; A plurality of top rods (501) are fixedly connected to the water guide plate (5); all the top rods (501) are aligned with the through grooves on the bottom surface of the placement frame (3); The left and right lengths of all the water guide plates (5) increase in sequence from bottom to top, so that when the placement frame (3) is tilted to drain water and dry, the water guide plates (5) fully cover the bottom of the corresponding placement frame (3).

2. A waste manganese iron phosphate lithium battery recycling device according to claim 1, characterized in that: The top end of the mandrel (501) is in the shape of a truncated cone.

3. The waste manganese iron phosphate lithium battery recycling equipment according to claim 1 is characterized in that: The pulling rope (2) is a 316L stainless steel wire rope.

4. The waste manganese iron phosphate lithium battery recycling equipment according to claim 1 is characterized in that: The expansion plate (6) is a rubber plate, and the side away from the water diversion plate (5) is rounded.

5. The waste manganese iron phosphate lithium battery recycling equipment according to claim 1, characterized in that: A plurality of scraping rings (103) are provided on the mounting frame (1), the diameter of the pulling rope (2) is consistent with the inner diameter of the scraping ring (103), and the pulling rope (2) passes through the corresponding scraping ring (103).

6. The waste manganese iron phosphate lithium battery recycling equipment according to claim 1, characterized in that: The invention also includes a closing plate (7) and an elastic member (8); all the connecting columns (4) are fixedly connected to an elastic member (8); all the connecting columns (4) on each placement frame (3) are slidably connected to a closing plate (7), and the two ends of the elastic member (8) provided on the connecting column (4) are respectively fixed to the connecting column (4) and the closing plate (7); the upper side surface of the closing plate (7) contacts the lower side surface of the adjacent water diversion plate (5); the closing plate (7) and the adjacent water diversion plate (5) have the same size; a plurality of drainage grooves (502) are provided on the water diversion plate (5); a plurality of drainage grooves (701) are provided on the closing plate (7); the drainage grooves (701) and the drainage grooves (502) are staggered; each connecting column (4) is provided with a slide groove (401); a plurality of sliders (503) are fixedly connected to the water diversion plate (5); each slider (503) is located in an adjacent slide groove (401).

7. A waste manganese iron phosphate lithium battery recycling device according to claim 6, characterized in that: All the drainage troughs (502) are arranged in an inclined shape on the left side.

8. The waste manganese iron phosphate lithium battery recycling equipment according to claim 1, characterized in that: A salt concentration sensor and a water level monitor are provided in the soaking barrel (9).

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