Batch recycling and discharging device for waste lithium iron phosphate batteries

Abstract

The invention provides a batch recycling and discharging device for waste lithium iron phosphate batteries, and belongs to the technical field of lithium battery recycling. Comprising a pool, a top plate is detachably connected to the top of the pool, a plurality of placement grooves are formed in the top of the top plate, the discharging mechanism comprises supporting pieces arranged in the placement grooves, and discharging plates are embedded in the side faces, away from batteries, of the supporting pieces. The discharge plate is electrically connected with the electrode of the battery, saline water is separated from the electrode, in the discharge process, due to the fact that the area of the discharge plate is larger than the area of the electrode of the battery, generated attachments are dispersed on the large-area discharge plate, and it is avoided that excessive attachments are locally accumulated to affect discharge; and the expanded and swelled battery is electrically disconnected, so that the stable and safe discharge of the battery is ensured.

Description

Technical Field

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

[0002] Lithium iron phosphate battery is a secondary battery. Its positive electrode material is lithium iron phosphate, its negative electrode material is graphite, and its electrolyte is an organic electrolyte solution. The charging and discharging process is achieved by the embedding and deintercalation of lithium ions between the positive and negative electrodes. Due to its significant advantages such as high safety, long cycle life and low cost, this battery is widely used in many fields such as new energy vehicles and energy storage systems. When the lithium iron phosphate battery reaches its recycling period, in order to prevent direct disposal and cause environmental pollution, it needs to be recycled in an environmentally friendly manner. Before disassembling the lithium iron phosphate battery, a discharge operation must be carried out first to avoid the risk of spontaneous combustion during the disassembly process. During discharge, the lithium iron phosphate battery is placed in a liquid (salt water). When the battery electrodes come into contact with the salt water, a closed circuit is formed between the two, thereby achieving discharge.

[0003] During the discharge process of lithium iron phosphate batteries, ions in salt water will undergo electrochemical reactions and side reactions with the battery electrode materials to generate insoluble metal chlorides, hydroxides or complexes. When the substances generated by the reaction adhere to the electrodes, the attachment layer on the electrodes will become thicker and thicker as the discharge time increases, thereby affecting the discharge of the battery. On the other hand, during the batch discharge treatment of lithium iron phosphate batteries, some waste batteries will have swelling and bulging, which may seriously cause battery fluid leakage and pollution and safety accidents. Therefore, the present application provides a batch recovery and discharge device for waste lithium iron phosphate batteries to meet the needs. Summary of the Invention

[0004] The present invention provides a batch recovery and discharge device for waste lithium iron phosphate batteries to solve the problem that during the discharge process of the battery, the attachment layer on the electrode becomes thicker and thicker, affecting the discharge of the battery. In addition, during the discharge of the battery, some waste batteries may swell and bulge, which may cause battery fluid leakage and pollution and safety accidents in serious cases.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A device for batch recycling and discharging waste lithium iron phosphate batteries includes a water pool, a drain pipe is provided on the side of the water pool, a valve is provided on the drain pipe, a top plate is detachably connected to the top of the water pool, and a plurality of placement slots are provided on the top of the top plate. The device also includes: A discharge mechanism, comprising a support member disposed in the placement groove, a discharge plate embedded on a side of the support member away from the battery, the discharge plate having an area larger than the battery electrode area, and electrically connected to the battery electrode; The support member includes a horizontal portion, a first vertical portion is fixed to an end of the horizontal portion away from the battery, an inclined portion is fixed to the top of the first vertical portion, the top of the inclined portion faces away from the battery, a second vertical portion is fixed to the top of the inclined portion, the discharge plate is embedded in the side of the second vertical portion away from the battery, and the bottom corner of the battery is attached to the angle formed by the horizontal portion and the first vertical portion; The top of the second vertical portion is rotatably connected to an L-shaped plate, and a contact plate is embedded in the vertical side of the L-shaped plate close to the battery; A square connecting plate is embedded on the side of the second vertical portion close to the battery, and the square connecting plate is electrically connected to the discharge plate. A curved spring piece is fixed on the side of the square connecting plate close to the battery, and the top of the curved spring piece is in contact with the surface of the contact plate. The discharge plate is electrically connected to the contact plate through the square connecting plate and the curved spring piece, and the side of the curved spring piece is in contact with the side of the battery.

[0006] Preferably, a positioning plate is fixed on the opposite side of the horizontal portion, the positioning plate is arranged obliquely, the top of the positioning plate faces away from the battery, and the positioning plate is clamped on the surface of the battery.

[0007] Preferably, a first spring is fixed to the bottom of the L-shaped plate, the first spring is attached to the top of the electrode of the battery, and the contact plate is electrically connected to the first spring.

[0008] Preferably, the surface of the curved spring piece is wrapped with an insulating layer, and the insulating layer is used to insulate the curved spring piece from the liquid.

[0009] Preferably, a square ring is movably sleeved on the surface of the second vertical portion, a rectangular connector is fixed on the side of the square ring away from the battery, the rectangular connector is fixed to the bottom of the top plate, the top of the second vertical portion is fixedly sleeved with a limiting member, the bottom of the limiting member fits against the top of the square ring, a brush is fixed on the side of the square ring away from the battery, and when the second vertical portion moves upward, the discharge plate passes through the bristles of the brush member.

[0010] Preferably, a positioning assembly is provided at the placement slot of the top plate, and the positioning assembly includes a guide hole opened on the inner wall of the placement slot, the inner wall of the guide hole is slidably connected to a guide member, a positioning wheel is fixed to the end of the guide member, a second spring is clamped between the positioning wheel and the placement slot, and a positioning slot is provided on the side of the second vertical portion away from the battery. When the battery is discharged, the positioning wheel is attached to the side of the L-shaped plate, and after the battery is pulled out, the positioning wheel is attached to the positioning slot.

[0011] Preferably, a display assembly is provided at the corner of the inner wall of the L-shaped plate, and the display assembly includes a T-shaped hollow rod that movably passes through the bottom of the L-shaped plate, and a square plate is fixed to the bottom of the T-shaped hollow rod. The square plate is located above the curved spring piece, and the side of the square plate is attached to the surface of the L-shaped plate. The side of the T-shaped hollow rod is provided with a red coating. After the battery discharges and expands, the expanded part of the battery drives the curved spring piece to deform, and the top of the curved spring piece drives the square plate and the T-shaped hollow rod to move upward.

[0012] Preferably, opposite sides of the top plate are provided with transport components, and the transport components are used to lift the top plate upwards.

[0013] Preferably, the transport assembly includes a connecting portion fixed to the side of the top plate, and a buckle portion is integrally formed on the bottom of the connecting portion.

[0014] Preferably, a protective portion inclined downward is integrally formed at the bottom of the buckle portion, a guiding portion is integrally formed at the bottom of the protective portion, and a connection between the protective portion and the guiding portion rests against the side of the pool.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. In the above scheme, by providing a discharge plate, the discharge plate is electrically connected to the battery electrode, isolating the battery electrode from contact with salt water, thereby preventing deposits from accumulating on the battery electrode surface and affecting discharge. Moreover, during the discharge process, since the area of ​​the discharge plate is larger than the area of ​​the battery electrode, deposits generated are dispersed over the large area of ​​the discharge plate. The deposit layer on the large area of ​​the discharge plate is thinner than that on the small area of ​​the electrode, making it less likely for excessive deposits to accumulate locally, thereby ensuring normal discharge of the battery. 2. By setting a brush, when removing the battery, the L-shaped plate drives the second vertical part to move upward, and the discharge plate on the side of the second vertical part will pass through the bristles of the brush, and the bristles of the brush will clean off the attachments on the surface of the discharge plate, thereby ensuring the normal discharge of the battery next time; 3. By providing the inclined portion and the second vertical portion, a space is created between the second vertical portion and the battery using the inclined portion. During the discharge process of the battery, the second vertical portion does not contact the side of the battery. Even if the battery expands, the second vertical portion will not squeeze the expanded part of the battery, thereby preventing the battery from rupturing and improving the safety during the discharge process. At the same time, after the battery expands, the space reserved between the second vertical portion and the side of the battery allows the expanded battery to still be taken out of the placement slot.

[0016] 4. By providing a curved spring piece and a contact plate, when the battery expands during discharge, the expanded portion of the battery squeezes the curved spring piece, causing it to deform and drive its top portion upward. When the battery expands significantly, the top portion of the curved spring piece separates from the contact plate, disconnecting the circuit between the battery electrode and the discharge plate, stopping the battery from being powered off, and preventing further expansion of the battery, further improving safety during discharge. By setting up a display component, when the battery expands during discharge, the expanded part of the battery squeezes the curved spring piece, causing the curved spring piece to deform and drive its top to move upward. When the battery expands significantly, the top of the curved spring piece will separate from the contact plate and then rest against the bottom of the square plate. When the battery continues to expand, the curved spring piece will drive the square plate and the T-shaped hollow rod to move upward, prompting staff that the discharge of this battery is not complete and it is in an expanded state, thereby preventing this battery from being mixed with discharged batteries and improving safety.

[0017] 6. By setting up the carrying assembly, before lifting the top plate upward, buckle your hand on the bottom of the buckle, and the buckle provides gripping space for the fingers, which is convenient for the operator to lift the top plate upward. Secondly, the protective part can prevent the fingers at the buckle from contacting the side of the pool when placing the top plate, thereby protecting the fingers. Then, the buckle is used to place the top plate down on the pool, and the guide part is used to guide the whole to avoid the carrying assembly being stuck on the top of the pool, making the operation more convenient. At the same time, the connection between the protective part and the guide part is against the side of the pool, so that the top plate can be prevented from shaking when placing or removing the battery, thereby limiting the position of the top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the water pool of the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at center A; Figure 4 A bottom view of the support member of the present invention; Figure 5 It is a front view of the support member of the present invention; Figure 6 This is a structural diagram of the positioning plate of the present invention; Figure 7 This is a structural diagram of the discharge plate of the present invention; Figure 8 This is a structural schematic diagram of the first spring of the present invention; Figure 9 It is a cross-sectional view of the second vertical portion of the present invention; Figure 10 This is a schematic diagram of the L-shaped plate structure of the present invention; Figure 11 It is a structural schematic diagram of the handling component of the present invention.

[0019] In the figure: 1. water tank; 2. drain pipe; 3. top plate; 4. discharge mechanism; 5. support member; 6. horizontal part; 7. first vertical part; 8. inclined part; 9. second vertical part; 10. square ring; 11. rectangular connecting member; 12. limit member; 13. positioning plate; 14. L-shaped plate; 15. first spring; 16. discharge plate; 17. square connecting plate; 18. curved spring piece; 19. insulating layer; 20. contact plate; 21. positioning assembly; 22. guide member; 23. second spring; 24. positioning wheel; 25. positioning groove; 26. brush member; 27. display assembly; 28. T-shaped hollow rod; 29. ​​square plate; 30. transport assembly; 31. connecting part; 32. buckle part; 33. protective part; 34. guide part.

[0020] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0021] The following describes in detail a device for batch recycling and discharging used lithium iron phosphate batteries provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0022] like Figures 1-11 As shown, an embodiment of the present invention provides a batch recovery and discharge device for waste lithium iron phosphate batteries, including a water pool 1, a perspective window inlaid on the front side of the water pool 1 for observing the water level of the internal brine when adding brine, a drain pipe 2 is opened on the side of the water pool 1, and a valve is provided at the drain pipe 2, which is used to control the opening and closing of the drain pipe 2, and a water inlet is provided on the side of the water pool 1 away from the drain pipe 2 for adding brine. The top of the water pool 1 is detachably connected to a top plate 3, and the top of the top plate 3 is provided with a plurality of placement slots, and further includes: The discharge mechanism 4 includes a support member 5 disposed in the placement groove. A discharge plate 16 is embedded on the side of the support member 5 away from the battery. The area of ​​the discharge plate 16 is larger than the area of ​​the battery electrode. The discharge plate 16 is electrically connected to the battery electrode. During the battery discharge process, it can disperse the attachments generated by the battery discharge, preventing the attachments from locally accumulating too thickly on the battery electrode and affecting the discharge effect. It ensures a continuous and stable electrical connection between the battery electrode and the discharge plate 16, ensuring that the battery discharge process proceeds smoothly, and improving the discharge efficiency and thoroughness of the discharge. The support member 5 includes a horizontal portion 6, a first vertical portion 7 is fixed to the end of the horizontal portion 6 away from the battery, an inclined portion 8 is fixed to the top of the first vertical portion 7, the top of the inclined portion 8 faces away from the battery, and a second vertical portion 9 is fixed to the top of the inclined portion 8. The discharge plate 16 is embedded in the side of the second vertical portion 9 away from the battery, and the bottom corner of the battery fits at the angle formed by the horizontal portion 6 and the first vertical portion 7. The angle formed by the horizontal portion 6 and the first vertical portion 7 provides a stable bottom support point for the battery, ensuring that the battery is fixed in position when placed; the inclined portion 8 reserves space between the second vertical portion 9 and the battery. When the battery expands during discharge, the second vertical portion 9 will not squeeze the battery, preventing the battery from rupturing due to external force, thereby ensuring the safety of the discharge process; at the same time, the reserved space also allows the expanded battery to be smoothly removed from the placement slot without affecting subsequent operations; The top of the second vertical portion 9 is rotatably connected to an L-shaped plate 14, and a contact plate 20 is embedded in the vertical side of the L-shaped plate 14 close to the battery; A square connecting plate 17 is embedded on the side of the second vertical portion 9 close to the battery. The square connecting plate 17 is electrically connected to the discharge plate 16. A curved spring piece 18 is fixed on the side of the square connecting plate 17 close to the battery. The top of the curved spring piece 18 is attached to the surface of the contact plate 20. The discharge plate 16 is electrically connected to the contact plate 20 through the square connecting plate 17 and the curved spring piece 18. The side of the curved spring piece 18 is attached to the side of the battery. The curved spring piece 18 is elastic and can sense the expansion change of the battery and deform when the battery discharges and expands. When the battery is discharging normally, the curved spring piece 18 remains attached to the contact plate 20 to ensure that the discharge circuit is conductive. When the battery expands excessively, the curved spring piece 18 is squeezed. , so that its top is separated from the contact plate 20, the circuit between the battery and the discharge plate 16 can be cut off in time, preventing the battery from being dangerous due to over-discharge, thereby playing a safety protection role; at the same time, the square connecting plate 17 serves as an intermediate carrier for electrical connection, ensuring stable electrical conduction between the discharge plate 16 and the contact plate 20. When the battery is discharged and the battery is removed, the curved spring piece 18 recovers its deformation under its own elastic force, and the active end of the curved spring piece 18 will abut against the lower surface of the L-shaped plate 14. The elastic force of the curved spring piece 18 prevents the two L-shaped plates 14 from flipping inward, so that the L-shaped plates 14 remain in an open state, which is convenient for the rapid placement of the next battery, simplifies the operation process, and improves work efficiency.

[0023] like Figure 6 As shown, in this embodiment, a positioning plate 13 is fixed on the opposite side of the horizontal portion 6. The positioning plate 13 is tilted, and the top of the positioning plate 13 is facing away from the battery. The positioning plate 13 is clamped on the surface of the battery. The tilted positioning plate 13 can apply a certain clamping force from the side of the battery, and works together with the horizontal portion 6 and the first vertical portion 7 to fix the battery in multiple directions, preventing the battery from shaking or shifting during placement and discharge, further enhancing the stability of the battery placement, and ensuring that the battery electrodes maintain good electrical contact with the discharge plate 16 during discharge.

[0024] like Figures 5-10 As shown, in this embodiment, a mounting plate is fixed to the top of the second vertical portion 9, a circular shaft is fixed to the side of the mounting plate, an L-shaped plate 14 is rotatably connected to the surface of the circular shaft, a first spring 15 is fixed to the bottom of the L-shaped plate 14, and the contact plate 20 is electrically connected to the first spring 15. The first spring 15 can provide elastic pressure to fit the top of the electrode, so that the battery electrode and the contact plate 20 ensure good electrical connection; the rotatable design of the L-shaped plate 14 can automatically adjust its position when placing the battery, so that the first spring 15 accurately fits the battery electrode, and can be rotated open after the battery is taken out, which is convenient for placing the battery next time; the contact plate 20 serves as an important conductive component for the electrical connection between the battery electrode and the discharge plate 16, ensuring the smooth flow of the discharge circuit.

[0025] like Figure 9 As shown, in this embodiment, the surface of the curved spring piece 18 is wrapped with an insulating layer 19, which is used to insulate the curved spring piece 18 from the liquid. The insulating layer 19 is wrapped around the surface of the curved spring piece 18, which can effectively isolate the curved spring piece 18 from the salt water in the pool 1, prevent the curved spring piece 18 from chemically reacting with the salt water and being corroded, and avoid attachments from attaching to the curved spring piece 18, affecting its normal working performance and elastic deformation function, thereby ensuring that the curved spring piece 18 always maintains a good condition during multiple discharges, reducing maintenance costs and frequency.

[0026] like Figure 4-Figure 9As shown, in this embodiment, the surface of the second vertical portion 9 is movably sleeved with a square ring 10, and a rectangular connector 11 is fixed to the side of the square ring 10 away from the battery. The rectangular connector 11 is fixed to the bottom of the top plate 3, and the top of the second vertical portion 9 is fixedly sleeved with a limiting member 12. The bottom of the limiting member 12 fits in with the top of the square ring 10. The square ring 10 and the second vertical portion 9 are movably sleeved to provide guidance and stable support for the up and down movement of the support member 5, ensuring that the support member 5 can move vertically without offset during the placement and removal of the battery; the limiting member 12 fits in with the top of the square ring 10, which can limit the downward position of the support member 5, preventing the support member 5 from excessively moving downward and damaging other parts of the device. Ensure that the support member 5 is in the appropriate position so that the battery electrodes and the discharge plate 16 and other components are accurately matched. A brush member 26 is fixed on the side of the square ring 10 away from the battery. The brush member 26 consists of bristles and a fixed plate. When the second vertical portion 9 moves upward, the discharge plate 16 passes through the bristles of the brush member 26. During the battery removal process, the second vertical portion 9 drives the discharge plate 16 to move upward. At this time, the discharge plate 16 passes through the brush member 26. The bristles of the brush member 26 can effectively brush off the attachments attached to the surface of the discharge plate 16, avoiding the residual attachments affecting the next battery discharge effect, realizing automatic cleaning of the discharge plate 16, ensuring that the discharge plate 16 is continuously in good working condition, and improving the efficiency and service life of the device.

[0027] like Figure 2 and Figure 3 As shown, in this embodiment, a positioning assembly 21 is provided at the placement groove of the top plate 3, and the positioning assembly 21 includes a guide hole opened on the inner wall of the placement groove, and the inner wall of the guide hole is slidably connected to a guide member 22, and a positioning wheel 24 is fixed to the end of the guide member 22. The positioning wheel 24 is composed of a wheel seat and a round roller. A rotating shaft is provided on the shaft seat, and the round roller is rotatably connected to the rotating shaft. A second spring 23 is clamped between the positioning wheel 24 and the placement groove, and protrusions are provided on the opposite sides of the placement groove and the shaft seat. The second spring 23 is clamped by the protrusion, and the second vertical portion 9 is opened on the side away from the battery. A positioning groove 25 is provided. When the battery is discharged, the positioning wheel 24 is attached to the side of the L-shaped plate 14. After the battery is pulled out, the positioning wheel 24 is attached to the positioning groove 25. During the battery discharge process, the elastic force of the second spring 23 pushes the positioning wheel 24 to attach to the side of the L-shaped plate 14, applying a certain pressure to the L-shaped plate 14, so that the first spring 15 is stably attached to the battery electrode, ensuring the stability of the electrical connection between the battery and the discharge plate 16; when the battery is removed, the positioning wheel 24 is clamped into the positioning groove 25 under the action of the second spring 23, thereby supporting the support member 5.

[0028] like Figure 2 and Figure 10As shown, in this embodiment, a display assembly 27 is provided at the inner corner of the L-shaped plate 14. The display assembly 27 includes a T-shaped hollow rod 28 that is movable through the bottom of the L-shaped plate 14. The T-shaped hollow rod 28 is hollow, which is convenient for the curved spring 18 to lift it up. A square plate 29 is fixed to the bottom of the T-shaped hollow rod 28. The square plate 29 is located above the curved spring 18. The side of the square plate 29 is attached to the surface of the L-shaped plate 14. The side of the T-shaped hollow rod 28 is provided with a red coating. After the battery is discharged and expanded, the battery expands. The expansion portion drives the curved spring piece 18 to deform, and the top of the curved spring piece 18 drives the square plate 29 and the T-shaped hollow rod 28 to move upward, and the red coating on the side of the T-shaped hollow rod 28 is exposed, providing a clear visual prompt for the staff, indicating that the battery has not been completely discharged and is in an expanded state, avoiding confusion between batteries that have not been completely discharged and batteries that have been completely discharged, preventing safety accidents caused by misoperation, and at the same time making it easier for staff to carry out targeted treatment of abnormal batteries, thereby improving the safety and management efficiency of the waste battery recycling process.

[0029] like Figure 1 and Figure 11 As shown, in this embodiment, a conveying assembly 30 is provided on opposite sides of the top plate 3. The conveying assembly 30 is used to lift the top plate 3 upward. After the conveying assembly 30 is provided, it is more labor-saving when lifting the top plate 3 upward or placing the top plate 3 downward.

[0030] like Figure 1 and Figure 11 As shown, in this embodiment, the transport assembly 30 includes a connecting portion 31 fixed to the side of the top plate 3, and a buckle portion 32 is integrally formed at the bottom of the connecting portion 31. The connecting portion 31 and the buckle portion 32 are connected in a smooth transition manner. The surfaces of the connecting portion 31 and the buckle portion 32 are both provided with anti-slip stripes, the bottom of the buckle portion 32 is a curved surface, and the connecting portion 31 is fixed to the side of the top plate 3 by welding.

[0031] like Figure 1 and Figure 11 As shown, in this embodiment, the bottom of the buckle 32 is integrally formed with a protective part 33 inclined downward, and the bottom of the protective part 33 is integrally formed with a guide part 34, and the connection between the protective part 33 and the guide part 34 is against the side of the pool 1. After the fingers are buckled on the buckle 32, the fingers can be prevented from contacting the side of the pool 1, and the fingers can be prevented from being stuck between the buckle 32 and the pool 1 when lifting up or placing down the top plate 3, thereby improving safety. Secondly, the guiding part 34 can guide the protective part 33 to avoid the protective part 33 being stuck on the top of the pool 1, thereby improving the convenience of operation. Then, after the top plate 3 is placed on the top of the pool 1, the connection between the protective part 33 and the guide part 34 is against the side of the pool 1, which can avoid the top plate 3 from shaking when placing and removing the battery, thereby improving the stability of the overall device during use.

[0032] Working principle: Initially, the L-shaped plate 14 remains open, and the curved spring piece 18 is located on one side of the L-shaped plate 14; the battery is placed in the placement groove of the top plate 3, and the bottom corner of the battery is attached to the angle formed by the horizontal portion 6 of the support member 5 and the first vertical portion 7. The positioning plate 13 is obliquely clamped on the surface of the battery to play a preliminary fixing role. After that, the battery is released and the battery will move downward under the action of gravity. The battery will drive the support member 5 to move downward. During the downward movement of the support member 5, the second vertical portion 9 in the support member 5 will slide on the inner wall of the square ring 10 until the limit member 12 is attached to the top of the square ring 10; At the same time, as the support member 5 moves downward, the support member 5 also drives the L-shaped plate 14 downward. When the L-shaped plate 14 contacts the positioning wheel 24, the L-shaped plate 14 rotates toward the battery until the first spring 15 on the L-shaped plate 14 fits against the battery electrode and the first spring 15 is stably fitted against the battery electrode by the elastic force of the second spring 23. During this process, the L-shaped plate 14 drives the curved spring piece 18 to move in the direction of the battery. Finally, the curved spring piece 18 fits against the side of the battery and is squeezed and deformed, causing the top of the curved spring piece 18 to move upward and fit against the contact plate 20. At this time, the discharge plates 16 on both sides are electrically connected to the contact plate 20 through the square connecting plate 17 and the curved spring piece 18, completing the circuit conduction between the battery electrode and the discharge plate 16. After the batteries are placed, salt water is poured in from the water inlet on the side of the pool 1, and the water level inside is observed through the perspective window on the side of the pool 1 until the salt water overflows the discharge plate 16 but does not overflow the brush 26. The battery electrodes and the discharge plate 16 form a closed loop in the salt water and discharge begins. Since the discharge plate 16 is larger than the battery electrodes, the attachments are dispersed on it, ensuring normal discharge of the battery. There is a space between the second vertical portion 9 and the battery to prevent the battery from being squeezed and ruptured when it expands. If the battery expands during discharge, the expanded area squeezes the curved spring piece 18, causing it to deform and move upward. When the expansion is large, the top of the curved spring piece 18 separates from the contact plate 20, disconnecting the battery from the discharge plate 16, stopping discharge and preventing excessive battery expansion. At the same time, the upward movement of the curved spring piece 18 pushes the square plate 29 of the display assembly 27 and the T-shaped hollow rod 28 upward, exposing the red coating on the side of the T-shaped hollow rod 28, prompting the operator that the battery has not been fully discharged and is in an expanded state. After the battery is discharged, the battery is pulled upward, driving the L-shaped plate 14 upward (you can press the L-shaped plate 14 with one hand) until the positioning wheel 24 is engaged with the positioning groove 25, supporting the support member 5. At this time, hold the battery with one hand and rotate the L-shaped plate 14 away from the battery with the other hand to release the battery limit and remove the battery. At this time, the curved spring piece 18 recovers its deformation toward the limit member 12 and abuts against the lower surface of the L-shaped plate 14, keeping the L-shaped plate 14 open, making it easier to place the battery next time. During the upward movement of the second vertical portion 9, the discharge plate 16 passes by the brush member 26, and the bristles of the brush clean the surface of the discharge plate 16. Specifically, the manual operation method can be replaced by equipment such as robotic arms to perform batch recovery and discharge operations on waste lithium iron phosphate batteries, thereby improving overall work efficiency and reducing labor costs to meet the needs of large-scale production in factories.

[0033] When the by-products generated by the reaction in the water pool 1 are too much and affect the discharge operation, the brine in the water pool 1 can also be replaced through the water inlet and the drain pipe 2 to ensure the stability and reliability of the discharge process.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A waste lithium iron phosphate battery batch recovery and discharge device, comprising a water pool (1), a drain pipe (2) is provided on the side of the water pool (1), a valve is provided at the drain pipe (2), a top plate (3) is detachably connected to the top of the water pool (1), and a plurality of placement slots are provided on the top of the top plate (3), characterized in that: Also includes: A discharge mechanism (4), the discharge mechanism (4) comprising a support member (5) disposed in the placement groove, a discharge plate (16) being embedded on a side of the support member (5) away from the battery, the area of ​​the discharge plate (16) being larger than the area of ​​the battery electrode, and the discharge plate (16) being electrically connected to the battery electrode; The support member (5) includes a horizontal portion (6), a first vertical portion (7) is fixed to one end of the horizontal portion (6) away from the battery, an inclined portion (8) is fixed to the top of the first vertical portion (7), the top of the inclined portion (8) faces in a direction away from the battery, a second vertical portion (9) is fixed to the top of the inclined portion (8), a discharge plate (16) is embedded on a side of the second vertical portion (9) away from the battery, and the bottom corner of the battery is attached to the angle formed by the horizontal portion (6) and the first vertical portion (7); The top of the second vertical portion (9) is rotatably connected to an L-shaped plate (14), and a contact plate (20) is embedded in the vertical side of the L-shaped plate (14) close to the battery; A square connecting plate (17) is embedded on the side of the second vertical portion (9) close to the battery. The square connecting plate (17) is electrically connected to the discharge plate (16). A curved spring piece (18) is fixed on the side of the square connecting plate (17) close to the battery. The top of the curved spring piece (18) is attached to the surface of the contact plate (20). The discharge plate (16) is electrically connected to the contact plate (20) through the square connecting plate (17) and the curved spring piece (18). The side of the curved spring piece (18) is attached to the side of the battery.

2. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: A positioning plate (13) is fixed on the opposite side of the horizontal portion (6), the positioning plate (13) is tilted, the top of the positioning plate (13) faces away from the battery, and the positioning plate (13) is clamped on the surface of the battery.

3. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: A first spring (15) is fixed to the bottom of the L-shaped plate (14), the first spring (15) is attached to the top of the battery electrode, and the contact plate (20) is electrically connected to the first spring (15).

4. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: The surface of the curved spring piece (18) is wrapped with an insulating layer (19), and the insulating layer (19) is used to insulate the curved spring piece (18) from the liquid.

5. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: A square ring (10) is movably sleeved on the surface of the second vertical portion (9), a rectangular connector (11) is fixed on the side of the square ring (10) away from the battery, the rectangular connector (11) is fixed to the bottom of the top plate (3), a limiting member (12) is fixedly sleeved on the top of the second vertical portion (9), the bottom of the limiting member (12) is attached to the top of the square ring (10), a brush member (26) is fixed on the side of the square ring (10) away from the battery, and when the second vertical portion (9) moves upward, the discharge plate (16) passes through the bristles of the brush member (26).

6. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: A positioning assembly (21) is provided at the placement groove of the top plate (3), and the positioning assembly (21) includes a guide hole opened on the inner wall of the placement groove, and the inner wall of the guide hole is slidably connected to a guide member (22), and a positioning wheel (24) is fixed to the end of the guide member (22), and a second spring (23) is clamped between the positioning wheel (24) and the placement groove. A positioning groove (25) is provided on the side of the second vertical portion (9) away from the battery. When the battery is discharged, the positioning wheel (24) is attached to the side of the L-shaped plate (14), and after the battery is pulled out, the positioning wheel (24) is attached to the positioning groove (25).

7. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: A display assembly (27) is provided at a corner of the inner wall of the L-shaped plate (14). The display assembly (27) includes a T-shaped hollow rod (28) that is movable and passes through the bottom of the L-shaped plate (14). A square plate (29) is fixed to the bottom of the T-shaped hollow rod (28). The square plate (29) is located above the curved spring piece (18). The side of the square plate (29) is attached to the surface of the L-shaped plate (14). The side of the T-shaped hollow rod (28) is provided with a red coating. After the battery is discharged and expanded, the expanded portion of the battery drives the curved spring piece (18) to deform, and the top of the curved spring piece (18) drives the square plate (29) and the T-shaped hollow rod (28) to move upward.

8. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 1, characterized in that: The opposite sides of the top plate (3) are both provided with transport assemblies (30), and the transport assemblies (30) are used to lift the top plate (3) upwards.

9. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 8, characterized in that: The transport assembly (30) comprises a connecting portion (31) fixed to the side of the top plate (3), and a buckle portion (32) is integrally formed at the bottom of the connecting portion (31).

10. The waste lithium iron phosphate battery batch recovery and discharge device according to claim 9, characterized in that: The bottom of the buckle (32) is integrally formed with a downwardly inclined protective portion (33), and the bottom of the protective portion (33) is integrally formed with a guide portion (34), and the connection between the protective portion (33) and the guide portion (34) abuts against the side of the pool (1).

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