Batch recovery and discharging device for waste lithium iron phosphate battery

Abstract

The application provides a batch recovery discharging device for waste lithium iron phosphate batteries, and belongs to the technical field of lithium battery recovery. The top of the water pool is detachably connected with a top plate, and a plurality of placing grooves are formed in the top plate. The discharging mechanism comprises a support arranged in the placing groove, and the side of the support away from the battery is inlaid with a discharging plate. The electrode of the battery is electrically connected with the discharging plate, and the salt water is separated from the electrode. In the discharging process, since the area of the discharging plate is larger than the area of the electrode of the battery, the generated attachments are dispersed on the large-area discharging plate, so that the excessive attachments accumulated in the local part do not affect the discharging. Meanwhile, the curved elastic sheet and the contact plate are arranged to disconnect the electrical connection of the battery with the expansion bulge, so as to ensure the stable and safe discharging of the battery.

Description

Technical Field

[0001] This invention relates to the field of lithium battery recycling technology, and in particular to a batch recycling and discharging device for waste lithium iron phosphate batteries. Background Technology

[0002] Lithium iron phosphate (LFP) batteries are a type of rechargeable battery. Their positive electrode material is lithium iron phosphate, and their negative electrode material is graphite. The electrolyte is an organic electrolyte solution. The charging and discharging process relies on the insertion and extraction of lithium ions between the positive and negative electrodes. Due to their significant advantages such as high safety, long cycle life, and low cost, these batteries are widely used in many fields, including new energy vehicles and energy storage systems. When LFP batteries reach their recycling period, they must be recycled in an environmentally friendly manner to prevent direct disposal and environmental pollution. Before disassembling LFP batteries, a discharge operation must be performed to avoid the risk of spontaneous combustion during disassembly. During discharge, the LFP battery is placed in a liquid (saltwater). When the battery electrodes come into contact with the saltwater, a closed circuit is formed between them, thus achieving discharge.

[0003] During the discharge process of lithium iron phosphate batteries, ions in the salt water undergo electrochemical reactions and side reactions with the battery electrode materials, generating insoluble metal chlorides, hydroxides, or complexes. When the substances generated by the reaction adhere to the electrodes, the deposited layer on the electrodes becomes thicker and thicker with increasing discharge time, thus affecting the battery's discharge. On the other hand, during the batch discharge processing of lithium iron phosphate batteries, some waste batteries may swell or bulge, which may lead to battery fluid leakage, pollution, and safety accidents in severe cases. Therefore, this application provides a batch recycling and discharge device for waste lithium iron phosphate batteries to meet the needs. Summary of the Invention

[0004] This invention provides a batch recycling and discharge device for waste lithium iron phosphate batteries to solve the problem that during the discharge process, the deposit layer on the electrodes becomes thicker and thicker, affecting the discharge of the battery. Furthermore, during the discharge process, some waste batteries may swell and bulge, which in severe cases can cause battery fluid leakage, pollution, and safety accidents.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A batch recycling and discharging device for waste lithium iron phosphate batteries includes a water tank, a drain pipe with a valve installed on the side of the water tank, a top plate detachably connected to the top of the water tank, and several placement slots on the top of the top plate. The device also includes:

[0007] The discharge mechanism includes a support member disposed in a placement slot, a discharge plate being embedded on the side of the support member away from the battery, the area of ​​the discharge plate being larger than the electrode area of ​​the battery, and the discharge plate being electrically connected to the electrodes of the battery.

[0008] The support includes a horizontal part, a first vertical part is fixed to the end of the horizontal part away from the battery, an inclined part is fixed to the top of the first vertical part, the top of the inclined part faces away from the battery, a second vertical part is fixed to the top of the inclined part, a discharge plate is embedded in the side of the second vertical part away from the battery, and the bottom corner of the battery is attached to the angle formed by the horizontal part and the first vertical part.

[0009] The top of the second vertical section is rotatably connected to an L-shaped plate, and a contact plate is embedded in the vertical side of the L-shaped plate near the battery.

[0010] A square connecting plate is embedded in the side of the second vertical section near the battery. The square connecting plate is electrically connected to the discharge plate. A curved spring is fixed to the side of the square connecting plate near the battery. The top of the curved spring is attached to 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. The side of the curved spring is attached to the side of the battery.

[0011] Preferably, a positioning plate is fixed to the opposite side of the horizontal part. The positioning plate is inclined, with its top facing away from the battery, and the positioning plate is snapped onto the surface of the battery.

[0012] Preferably, a first spring is fixed to the bottom of the L-shaped plate, the first spring is attached to the top of the battery electrode, and the contact plate is electrically connected to the first spring.

[0013] Preferably, the surface of the curved spring is covered with an insulating layer, which serves to insulate the curved spring from the liquid.

[0014] Preferably, a square ring is movably sleeved on the surface of the second vertical part, and 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, and a limiting member is fixedly sleeved on the top of the second vertical part. The bottom of the limiting member is attached to the top of the square ring, and a brush is fixed on the side of the square ring away from the battery. When the second vertical part moves upward, the discharge plate passes through the bristles of the brush.

[0015] Preferably, a positioning component is provided at the placement slot of the top plate. The positioning component includes a guide hole opened in the inner wall of the placement slot, a guide member slidably connected to the inner wall of the guide hole, a positioning wheel fixed at the end of the guide member, a second spring engaging between the positioning wheel and the placement slot, and a positioning slot opened on the side of the second vertical part away from the battery. When the battery is discharging, the positioning wheel is attached to the side of the L-shaped plate. After the battery is pulled out, the positioning wheel is attached to the positioning slot.

[0016] Preferably, a display component is provided at the inner corner of the L-shaped plate. The display component includes a T-shaped hollow rod that moves through the bottom of the L-shaped plate. A square plate is fixed to the bottom of the T-shaped hollow rod. The square plate is located above the curved spring piece. The side of the square plate is attached to the surface of the L-shaped plate. A red coating is provided on the side of the T-shaped hollow rod. After the battery discharges and expands, the battery expansion part drives the curved spring piece to deform. The top of the curved spring piece drives the square plate and the T-shaped hollow rod to move upward.

[0017] Preferably, each of the opposite sides of the top plate is provided with a conveying assembly, which is used to lift the top plate upward.

[0018] Preferably, the conveying assembly includes a connecting part fixed to the side of the top plate, and the bottom of the connecting part has an integrally formed buckle.

[0019] Preferably, the bottom of the buckle is integrally formed with a downwardly inclined protective part, and the bottom of the protective part is integrally formed with a guide part, and the connection between the protective part and the guide part abuts against the side of the pool.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] 1. In the above scheme, by setting up a discharge plate, the discharge plate is electrically connected to the battery electrode, isolating the battery electrode from contact with salt water, thereby avoiding the accumulation of deposits on the surface of the battery electrode and affecting the discharge; and during the discharge process, since the area of ​​the discharge plate is larger than the area of ​​the battery electrode, the deposits generated are dispersed on the large-area discharge plate. The deposit layer on the large-area discharge plate is thinner than that on the small-area electrode, and it is not easy for too many deposits to accumulate locally, thereby ensuring the normal discharge of the battery.

[0022] 2. By setting up the brush, during the process of removing the battery, the L-shaped plate drives the second vertical part to move upward. The discharge plate on the side of the second vertical part will pass through the brush bristles. The brush bristles will clean the deposits on the surface of the discharge plate, thereby ensuring the normal discharge of the battery in the next cycle.

[0023] 3. By setting an inclined part and a second vertical part, the inclined part creates a space between the second vertical part and the battery. During the battery discharge process, the second vertical part does not contact the side of the battery. Even if the battery expands, the second vertical part will not squeeze the expanded part of the battery, preventing the battery from breaking and improving safety during the discharge process. At the same time, after the battery expands, the space reserved between the second vertical part and the side of the battery allows the expanded battery to still be removed from the placement slot.

[0024] 4. By setting curved springs and contact plates, when the battery expands during discharge, the expanded part of the battery squeezes the curved springs, the curved springs deform and drive their tops to move upwards. When the battery expands to a large extent, the top of the curved springs detaches from the contact plates, the circuit between the battery electrodes and the discharge plate is broken, the battery stops being powered off, and the battery is prevented from continuing to expand, further improving the safety during the discharge process.

[0025] By setting up a display component, when the battery expands during discharge, the expanded area of ​​the battery squeezes the curved spring. The curved spring deforms and moves its top upward. When the battery expands to a large extent, the top of the curved spring detaches from the contact plate and rests against the bottom of the square plate. As the battery continues to expand, the curved spring will move the square plate and the T-shaped hollow rod upward, indicating to the staff that the battery has not finished discharging and is in an expanded state, thus preventing this battery from being mixed with the fully discharged battery and improving safety.

[0026] 6. By setting up the handling component, before lifting the top plate upwards, the operator can place their hand on the bottom of the buckle. The buckle provides a gripping space for the fingers, making it easier for the operator to lift the top plate upwards. Secondly, the protective part prevents the fingers at the buckle from contacting the side of the pool when placing the top plate, thus protecting the fingers. Next, the top plate is placed downwards on the pool using the buckle. The guide part guides the entire structure, preventing the handling component from getting stuck on the top of the pool, making operation more convenient. At the same time, the connection between the protective part and the guide part rests against the side of the pool, thus preventing the top plate from shaking when placing or removing the battery, thus limiting the movement of the top plate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the water tank section of the present invention;

[0029] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0030] Figure 4 This is a bottom view of the support member of the present invention;

[0031] Figure 5 This is a front view of the support member of the present invention;

[0032] Figure 6 This is a schematic diagram of the positioning plate structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the discharge plate of the present invention;

[0034] Figure 8This is a schematic diagram of the structure of the first spring in this invention;

[0035] Figure 9 This is a cross-sectional view of the second vertical portion of the present invention;

[0036] Figure 10 This is a schematic diagram of the structure at the L-shaped plate of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the transport component of the present invention.

[0038] In the diagram: 1. Water tank; 2. Drainage pipe; 3. Top plate; 4. Discharge mechanism; 5. Support component; 6. Horizontal section; 7. First vertical section; 8. Inclined section; 9. Second vertical section; 10. Square ring; 11. Rectangular connector; 12. Limiting component; 13. Positioning plate; 14. L-shaped plate; 15. First spring; 16. Discharge plate; 17. Square connecting plate; 18. Curved spring; 19. Insulating layer; 20. Contact plate; 21. Positioning assembly; 22. Guide component; 23. Second spring; 24. Positioning wheel; 25. Positioning groove; 26. Brush component; 27. Display assembly; 28. T-shaped hollow rod; 29. ​​Square plate; 30. Transport assembly; 31. Connecting part; 32. Buckle part; 33. Protective part; 34. Guiding part.

[0039] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0040] The present invention provides a batch recycling and discharging device for waste lithium iron phosphate batteries, described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0041] like Figures 1-11As shown, an embodiment of the present invention provides a batch recycling and discharging device for waste lithium iron phosphate batteries, including a water tank 1. A viewing window is embedded in the front of the water tank 1 for observing the water level of the brine when brine is added. A drain pipe 2 is provided on the side of the water tank 1, and a valve is installed at the drain pipe 2 to control the opening and closing of the drain pipe 2. An inlet is provided on the side of the water tank 1 away from the drain pipe 2 for adding brine. A top plate 3 is detachably connected to the top of the water tank 1, and several placement slots are provided on the top of the top plate 3. The device also includes:

[0042] 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 electrode area of ​​the battery. The discharge plate 16 is electrically connected to the electrode of the battery. During the battery discharge process, it can disperse the deposits generated by the battery discharge, avoid the deposits from accumulating too thickly on the local part of the battery electrode and affecting the discharge effect, ensure a continuous and stable electrical connection between the battery electrode and the discharge plate 16, ensure the smooth progress of the battery discharge process, and improve the discharge efficiency and the thoroughness of the discharge.

[0043] The support member 5 includes a horizontal part 6, a first vertical part 7 fixed to the end of the horizontal part 6 away from the battery, an inclined part 8 fixed to the top of the first vertical part 7, the top of the inclined part 8 facing away from the battery, and a second vertical part 9 fixed to the top of the inclined part 8. The discharge plate 16 is embedded in the side of the second vertical part 9 away from the battery. The bottom corner of the battery fits into the angle formed by the horizontal part 6 and the first vertical part 7. The angle formed by the horizontal part 6 and the first vertical part 7 provides a stable bottom support point for the battery, ensuring that the battery is fixed in position when placed. The inclined part 8 leaves space between the second vertical part 9 and the battery. When the battery expands during discharge, the second vertical part 9 will not squeeze the battery, preventing the battery from cracking due to external pressure and 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.

[0044] The top of the second vertical part 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 near the battery.

[0045] A square connecting plate 17 is embedded in the second vertical section 9 near the battery. The square connecting plate 17 is electrically connected to the discharge plate 16. A curved spring piece 18 is fixed to the square connecting plate 17 near 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 when the battery is discharging and deform accordingly. When the battery is discharging normally, the curved spring piece 18 remains attached to the contact plate 20 to ensure the discharge circuit is conductive. When the battery excessively expands and squeezes the curved spring piece 18... When the top of the battery detaches 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 and 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 removed, the curved spring 18 recovers its deformation under its own elasticity. The movable end of the curved spring 18 will abut against the lower surface of the L-shaped plate 14. Through the elasticity of the curved spring 18, the two L-shaped plates 14 are prevented from flipping inward, keeping the L-shaped plates 14 in an open state, which facilitates the quick placement of the battery next time, simplifies the operation process, and improves work efficiency.

[0046] like Figure 6 As shown in this embodiment, a positioning plate 13 is fixed on the opposite side of the horizontal part 6. The positioning plate 13 is inclined and its top faces away from the battery. The positioning plate 13 is snapped onto the surface of the battery. The inclined positioning plate 13 can apply a certain clamping force from the side of the battery. Together with the horizontal part 6 and the first vertical part 7, it fixes the battery in multiple directions, preventing the battery from shaking or shifting during placement and discharge. This further enhances the stability of battery placement and ensures that the battery electrodes maintain good electrical contact with the discharge plate 16 during discharge.

[0047] like Figures 5-10 As shown, in this embodiment, a mounting plate is fixed to the top of the second vertical part 9, and a round shaft is fixed to the side of the mounting plate. An L-shaped plate 14 is rotatably connected to the surface of the round shaft. A first spring 15 is fixed to the bottom of the L-shaped plate 14. The contact plate 20 is electrically connected to the first spring 15. The first spring 15 can provide elastic pressure to fit against the top of the electrode, ensuring a good electrical connection between the battery electrode and the contact plate 20. The rotatable design of the L-shaped plate 14 can automatically adjust its position when the battery is placed, so that the first spring 15 accurately fits against the battery electrode. It can also be rotated open after the battery is removed, making it convenient to place 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.

[0048] like Figure 9As shown in this embodiment, the surface of the curved spring 18 is covered with an insulating layer 19. The insulating layer 19 is used to insulate the curved spring 18 from the liquid. The insulating layer 19 covers the surface of the curved spring 18 and can effectively isolate the curved spring 18 from the salt water in the water tank 1, prevent the curved spring 18 from reacting chemically with the salt water and being corroded, avoid the adhesion of deposits on the curved spring 18 to affect its normal working performance and elastic deformation function, ensure that the curved spring 18 always maintains a good condition during multiple discharges, and reduce maintenance costs and frequency.

[0049] like Figures 4-9 As shown in this embodiment, a square ring 10 is movably sleeved on the surface of the second vertical part 9. 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. A limiting member 12 is fixedly sleeved on the top of the second vertical part 9. The bottom of the limiting member 12 is attached to the top of the square ring 10. The movable sleeve of the square ring 10 and the second vertical part 9 provides guidance and stable support for the vertical movement of the support member 5, ensuring that the support member 5 can move vertically without deviation during battery placement and removal. The limiting member 12 is attached to the top of the square ring 10, which can limit the downward movement of the support member 5 and prevent the support member 5 from moving too far downward and damaging other components of the device. To ensure that the support member 5 is in the correct 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 fixing plate. When the second vertical part 9 moves upward, the discharge plate 16 passes through the bristles of the brush member 26. During the process of removing the battery, the second vertical part 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 remove the adhering substances on the surface of the discharge plate 16, avoiding the residue of adhering substances from affecting the next battery discharge effect. This realizes automatic cleaning of the discharge plate 16, ensures that the discharge plate 16 is always in good working condition, and improves the efficiency and service life of the device.

[0050] like Figure 2 and Figure 3As shown, in this embodiment, a positioning component 21 is provided at the placement slot of the top plate 3. The positioning component 21 includes a guide hole formed in the inner wall of the placement slot. A guide member 22 is slidably connected to the inner wall of the guide hole. A positioning wheel 24 is fixed to the end of the guide member 22. The positioning wheel 24 consists of a wheel seat and a roller. A rotating shaft is provided on the shaft seat. The roller is rotatably connected to the rotating shaft. A second spring 23 is engaged between the positioning wheel 24 and the placement slot. Protrusions are provided on the opposite sides of the placement slot and the shaft seat. The second spring 23 is engaged through the protrusions. The second vertical part 9 is opened on the side away from the battery. A positioning groove 25 is provided. When the battery is discharging, the positioning wheel 24 is attached to the side of the L-shaped plate 14. After the battery is removed, 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 be attached 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 inserted into the positioning groove 25 under the action of the second spring 23, which provides support for the support member 5.

[0051] like Figure 2 and Figure 10 As shown in this embodiment, a display component 27 is provided at the corner of the inner wall of the L-shaped plate 14. The display component 27 includes a T-shaped hollow rod 28 that movably passes through the bottom of the L-shaped plate 14. The T-shaped hollow rod 28 is hollow to facilitate being lifted by the curved spring piece 18. 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, and 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 discharges and expands, the battery expands... The expansion section drives the curved spring 18 to deform, and the top of the curved spring 18 drives the square plate 29 and the T-shaped hollow rod 28 to move upward. The red coating on the side of the T-shaped hollow rod 28 is then exposed, providing a clear visual indication to the staff that the battery has not been fully discharged and is in an expanded state. This avoids confusing batteries that have not been fully discharged with those that have been fully discharged, prevents safety accidents caused by misoperation, and facilitates the targeted handling of abnormal batteries by the staff, thereby improving the safety and management efficiency of the waste battery recycling process.

[0052] like Figure 1 and Figure 11 As shown in this embodiment, a conveying assembly 30 is provided on each of the 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 to lift the top plate 3 upward or place the top plate 3 downward.

[0053] like Figure 1 and Figure 11As shown, in this embodiment, the conveying component 30 includes a connecting part 31 fixed to the side of the top plate 3. The bottom of the connecting part 31 is integrally formed with a buckle 32. The connecting part 31 and the buckle 32 are connected by a smooth transition. The surfaces of the connecting part 31 and the buckle 32 are provided with anti-slip stripes. The bottom of the buckle 32 is curved. The connecting part 31 is fixed to the side of the top plate 3 by welding.

[0054] like Figure 1 and Figure 11 As shown, in this embodiment, the bottom of the buckle 32 is integrally formed with a downwardly inclined protective part 33, and the bottom of the protective part 33 is integrally formed with a guide part 34. The connection between the protective part 33 and the guide part 34 rests against the side of the water tank 1. After the finger is buckled on the buckle 32, it can prevent the finger from contacting the side of the water tank 1, and prevent the finger from getting stuck between the buckle 32 and the water tank 1 when lifting or lowering the top plate 3, thus improving safety. Secondly, the guide part 34 can guide the protective part 33 to prevent the protective part 33 from getting stuck on the top of the water tank 1, thus improving the convenience of operation. Then, after the top plate 3 is placed on the top of the water tank 1, the connection between the protective part 33 and the guide part 34 rests against the side of the water tank 1, which can prevent the top plate 3 from shaking when placing and removing the battery, thus improving the stability of the overall device in use.

[0055] Working principle: Initially, the L-shaped plate 14 is kept 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 slot of the top plate 3, and the bottom corner of the battery is attached to the angle formed by the horizontal part 6 and the first vertical part 7 of the support member 5. The positioning plate 13 is tilted and snapped onto the surface of the battery to play a preliminary fixing role. Then 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 part 9 in the support member 5 will slide on the inner wall of the square ring 10 until the limiting member 12 is attached to the top of the square ring 10.

[0056] At the same time, as the support 5 moves downward, the support 5 also drives the L-shaped plate 14 to move downward. When the L-shaped plate 14 contacts the positioning wheel 24, the L-shaped plate 14 will rotate towards the battery until the first spring 15 on the L-shaped plate 14 is attached to the battery electrode. The first spring 15 is stably attached to the battery electrode by the elastic force of the second spring 23. During this process, the L-shaped plate 14 drives the curved spring 18 to move towards the battery in an arc shape. Finally, the curved spring 18 is attached to the side of the battery and is squeezed and deformed, so that the top of the curved spring 18 moves up and is attached to 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 18, completing the circuit connection between the battery electrode and the discharge plate 16.

[0057] After the battery is placed, salt water is injected through the water inlet on the side of the pool 1, and the water level inside is observed through the viewing 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 electrode and the discharge plate 16 form a closed circuit in the salt water and begin to discharge. Since the area of ​​the discharge plate 16 is larger than that of the battery electrode, the attached substances are dispersed on it, ensuring that the battery discharges normally. There is space between the second vertical part 9 and the battery to prevent the battery from being squeezed and broken when it expands.

[0058] If the battery expands during discharge, the expanded area will compress the curved spring 18, causing it to deform and move upward. When the expansion is large, the top of the curved spring 18 will detach from the contact plate 20, the battery will disconnect from the discharge plate 16, and the discharge will stop, preventing the battery from expanding excessively. At the same time, the upward movement of the curved spring 18 will push the square plate 29 and the T-shaped hollow rod 28 of the display component 27 to move upward, and the red coating on the side of the T-shaped hollow rod 28 will be exposed, indicating to the staff that the battery has not finished discharging and is in an expanded state.

[0059] After the battery is discharged, pull the battery upwards, causing the L-shaped plate 14 to move upwards (you can hold the L-shaped plate 14 with one hand) until the positioning wheel 24 is engaged in 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 restriction on the battery, and then remove the battery. At this time, the curved spring piece 18 returns to its original shape towards the limiting member 12 and abuts against the lower surface of the L-shaped plate 14, keeping the L-shaped plate 14 in an open state for easy placement of the battery next time. During the upward movement of the second vertical part 9, the discharge plate 16 passes by the brush member 26, and the brush bristles clean the surface of the discharge plate 16.

[0060] Specifically, manual operation can be replaced by equipment such as robotic arms to perform batch recycling 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 factory production.

[0061] When excessive byproducts generated in the reaction in pool 1 affect the discharge operation, the brine in pool 1 can be replaced through the inlet and outlet pipe 2 to ensure the stability and reliability of the discharge process.

[0062] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A batch recycling and discharging device for waste lithium iron phosphate batteries, comprising a water tank (1), wherein a drain pipe (2) is provided on the side of the water tank (1), a valve is provided at the drain pipe (2), and a top plate (3) is detachably connected to the top of the water tank (1), wherein a plurality of placement slots are provided on the top of the top plate (3), characterized in that, Also 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 electrode area of ​​the battery. The discharge plate (16) is electrically connected to the electrode of the battery. The support member (5) includes a horizontal part (6), a first vertical part (7) is fixed to the end of the horizontal part (6) away from the battery, an inclined part (8) is fixed to the top of the first vertical part (7), the top of the inclined part (8) faces away from the battery, a second vertical part (9) is fixed to the top of the inclined part (8), a discharge plate (16) is embedded in the side of the second vertical part (9) away from the battery, and the bottom corner of the battery is attached to the angle formed by the horizontal part (6) and the first vertical part (7); The top of the second vertical part (9) is rotatably connected to an L-shaped plate (14), and a contact plate (20) is inlaid on the vertical side of the L-shaped plate (14) near the battery. A square connecting plate (17) is embedded on the side of the second vertical part (9) near 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) near 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. A first spring (15) is fixed at the bottom of the L-shaped plate (14). The first spring (15) is attached to the top of the battery electrode. (20) is electrically connected to the first spring (15). A positioning component (21) is provided at the placement slot of the top plate (3). The positioning component (21) includes a guide hole opened in the inner wall of the placement slot. A guide member (22) is slidably connected to the inner wall of the guide hole. A positioning wheel (24) is fixed at the end of the guide member (22). A second spring (23) is engaged between the positioning wheel (24) and the placement slot. A positioning slot (25) is opened on the side of the second vertical part (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). After the battery is pulled out, the positioning wheel (24) is attached to the positioning slot (25).

2. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 1, characterized in that, A positioning plate (13) is fixed on the opposite side of the horizontal part (6). The positioning plate (13) is inclined and the top of the positioning plate (13) faces away from the battery. The positioning plate (13) is snapped onto the surface of the battery.

3. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 1, characterized in that, The surface of the curved spring (18) is covered with an insulating layer (19), which is used to insulate the curved spring (18) from the liquid.

4. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 1, characterized in that, A square ring (10) is movably sleeved on the surface of the second vertical part (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 part (9). The bottom of the limiting member (12) is attached to the top of the square ring (10). A brush (26) is fixed on the side of the square ring (10) away from the battery. When the second vertical part (9) moves upward, the discharge plate (16) passes through the bristles of the brush (26).

5. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 1, characterized in that, A display component (27) is provided at the corner of the inner wall of the L-shaped plate (14). The display component (27) includes a T-shaped hollow rod (28) that is movably inserted 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 (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 discharges and expands, the battery expansion part drives the curved spring (18) to deform. The top of the curved spring (18) drives the square plate (29) and the T-shaped hollow rod (28) to move upward.

6. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 1, characterized in that, Each of the opposite sides of the top plate (3) is provided with a conveying assembly (30), which is used to lift the top plate (3) upward.

7. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 6, characterized in that, The transport assembly (30) includes a connecting part (31) fixed to the side of the top plate (3), and the bottom of the connecting part (31) is integrally formed with a buckle (32).

8. The batch recycling and discharging device for waste lithium iron phosphate batteries according to claim 7, characterized in that, The bottom of the buckle (32) is integrally formed with a downwardly inclined protective part (33), and the bottom of the protective part (33) is integrally formed with a guide part (34). The connection between the protective part (33) and the guide part (34) abuts against the side of the pool (1).

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