An integrated crushing and recycling method for waste lithium iron phosphate batteries

Abstract

The present invention relates to the field of recycling of waste lithium iron phosphate batteries, and in particular to an integrated crushing and recycling method for waste lithium iron phosphate batteries; the present invention screens materials by pushing an upper screen plate back and forth to swing, while a knife holder disc drives an external crushing knife to crush the materials, and a combing rod turns the fallen materials back and forth to increase the contact area between the materials and the air, which can not only improve the screening effect of the materials, but also accelerate the drying speed of the materials.

Description

Technical Field

[0001] The present invention relates to the field of recycling of waste lithium iron phosphate batteries, and in particular to an integrated crushing and recycling method for waste lithium iron phosphate batteries. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. As a high-performance secondary green power source, lithium-ion battery has been widely used in electronic products, communication tools, etc., and has been gradually developed as a power source for electric vehicles.

[0003] The waste lithium iron phosphate batteries reported so far are mainly for recycling lithium elements, and lithium carbonate, lithium phosphate or lithium dihydrogen phosphate are obtained by precipitation. There are also some reports that phosphorus and iron elements are recovered by obtaining iron phosphate precipitation. If waste batteries cannot be effectively recycled and reused, they will face severe ecological pollution and waste of resources. Therefore, it is very necessary to recycle the lithium iron phosphate materials in waste lithium iron phosphate power batteries. In the process of recycling waste lithium iron phosphate batteries, after discharging and disassembling the waste lithium iron phosphate batteries, the materials of the positive electrode plates are also crushed to facilitate the subsequent acid aging and defluorination treatment of the battery powder. However, it is difficult to screen and dry on the same equipment after crushing in the existing technology. It requires multiple equipment to operate separately, and workers are required to continuously transport materials for processing, which is time-consuming and labor-intensive while increasing costs. In addition, the waste gas and dust generated during the crushing process are directly discharged into the environment, which will have a serious impact on the health of workers and also pollute the environment.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to make the driven disc drive the external linkage convex rod to push the upper screen plate back and forth to swing so as to screen the material, and at the same time make the knife holder disc drive the external crushing knife to crush the material, so as to realize screening while crushing, and the combing rod turns the fallen material back and forth so as to increase the contact area between the material and the air, thereby promoting the contact area between the material and the air, so as to achieve the effect of improving the screening effect of the equipment and accelerating the drying speed of the material;

[0006] The dust and waste gas inside the protective shell are processed by the suction fan, so that the air flow rate on the surface of the material on the bottom surface of the protective shell is accelerated, and the liquid on the material moves with the air flow, thereby achieving the effect of accelerating the drying of the material. At the same time, the waste gas and dust enter the interior of the waste gas pipe, and the waste gas and dust are processed, absorbed and filtered by multiple honeycomb filter pads and then discharged from the interior of the waste gas pipe, thereby solving the problem of direct emission of waste gas and dust.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] An integrated crushing and recycling method for waste lithium iron phosphate batteries, the recycling method for waste lithium iron phosphate batteries comprising the following steps:

[0009] Step 1: short-circuit discharge and dismantle the waste lithium iron phosphate battery to obtain a material containing a positive electrode sheet, and then add the obtained material into a crushing device for crushing to obtain battery powder, so as to facilitate acid aging and defluorination treatment of the battery powder;

[0010] Step 2: During the crushing process, the positive electrode material is poured into the feed pipe to crush the material. The material slides down the sliding plate into the protective shell, and is crushed by the crushing knife on the knife holder. The crushed material falls onto the screen plate. During the crushing process, the drive belt drives the pulley to rotate, so that the driven disc rotates, and the driven disc drives the external linkage convex rod to push the upper screen plate back and forth to swing, so that screening can be achieved while crushing;

[0011] Step 3: During screening, the driven disc drives the linkage rod to move through the output rod, so that the linkage rod drives the crank connecting rod outside the transmission crank rod to reciprocate while rotating in a circle, so that the crank connecting rod pulls the fixed rod to move synchronously, and the fixed rod drives the positioning slider to slide inside the positioning slide rail, and at the same time, the fixed rod drives the combing rod to flip the screened material back and forth, thereby increasing the contact area between the material and the air and accelerating the drying of the material;

[0012] Step 4: The drive wheel at the other end of the drive belt is driven to rotate through the pulley, so that the drive wheel drives the linkage gear to rotate synchronously through the driven shaft, and the suction fan is rotated through the transmission between the gears, so that according to the Bernoulli principle, the internal air flow of the protective shell is accelerated to promote the drying of the material. At the same time, the exhaust gas and dust inside the protective shell are processed and discharged after being processed through multiple honeycomb filter pads inside the exhaust pipe, thereby achieving the effect of protecting the environment and promoting the drying of the material;

[0013] Step 5: The battery powder obtained after the treatment is acid-dissolved, which helps to improve the efficiency of the acid-dissolution on the one hand, and avoids the influence of impurities on the other hand. After the acid-dissolution, it is filtered, mixed, dehydrated, dried, and sintered to obtain the required lithium iron phosphate or lithium iron manganese phosphate.

[0014] Preferably, the crushing device comprises a supporting base plate, a protective shell is fixedly connected to the upper surface of the supporting base plate, a heating plate is symmetrically fixedly connected to the interior of the protective shell, a feed pipe is plugged into the interior of the upper end of the protective shell, a lower slide is fixedly connected to the interior of the feed pipe, a protective cover is fixedly connected to the front surface of the protective shell, a driving motor is fixedly connected to the side of the protective cover away from the protective shell, a driving shaft is plugged into the interior of the protective shell, and the driving shaft cooperates with the driving motor, a tool holder disc is sleeved on the exterior of the driving shaft, and a crushing knife is arranged on the outer surface of the tool holder disc;

[0015] A pulley is rotatably connected to one side of the protective shell close to the drive motor, a drive belt is sleeved on the outside of the pulley, and the drive belt cooperates with the drive shaft, a transmission belt is sleeved on the outside of the pulley behind the drive belt, a clean air and powder removal mechanism is fixedly connected to one side of the protective shell, and a compensation mechanism is provided inside the protective shell below the crushing knife.

[0016] Preferably, the air purification and powder removal mechanism includes an exhaust gas pipe, a guide tube is fixedly connected to the front surface of the exhaust gas pipe, a driven shaft is inserted into the interior of the guide tube, a transmission wheel is sleeved on the outside of the driven shaft, and the transmission wheel cooperates with the transmission belt, a filter mesh is arranged inside one side of the exhaust gas pipe, a fan shaft is rotatably connected to the inside of the side of the exhaust gas pipe close to the protective shell, an air intake fan is sleeved on the outside of the fan shaft, and the air intake fan is located inside the protective shell, a positioning frame is sleeved on the outside of the fan shaft, and the positioning frame is fixedly connected to the protective shell, a bevel gear is fixedly connected to the end of the fan shaft away from the air intake fan, and a linkage gear is meshed on the outer surface of the bevel gear.

[0017] Preferably, a honeycomb filter pad is provided inside the exhaust gas pipe below the linkage gear, a slow flow plate is fixedly connected to the inner wall of the exhaust gas pipe below the honeycomb filter pad, a fixed shaft is fixedly connected to the inside of the protective shell, a screen plate is sleeved on the outside of the fixed shaft, a baffle plate is fixedly connected to the upper surface of the screen plate, and the baffle plate is located below the crushing knife.

[0018] Preferably, the compensation mechanism includes a positioning slide rail, the internal sliding connection of the positioning slide rail is connected to a positioning slider, the front surface of the positioning slider is fixedly connected to a fixing rod, the external sleeve of the fixing rod is sleeved with a crank connecting rod, the lower surface of the fixing rod is fixedly connected to evenly distributed combing rods, the crank connecting rod has a transmission crank rod inserted into the internal end of the crank connecting rod away from the fixing rod, the transmission crank rod is fixedly connected to a linkage rod at one end close to the positioning slide rail, the linkage rod is fixedly connected to an output rod at a side away from the transmission crank rod, the output rod is fixedly connected to a driven disc at one end away from the linkage rod, and the driven disc has a linkage cam sleeved on the external end.

[0019] Preferably, a pulley disk matching the driving belt is sleeved on the outside of one end of the driving shaft close to the protective cover, and multiple driving belts are sleeved on the outside of the pulley disk, and the outer surface of the protective cover is symmetrically provided with through hole grooves matching the driving belts, and one end of the pulley close to the protective shell is fixedly connected to a cylindrical shaft, and the end of the cylindrical shaft away from the pulley passes through the interior of the protective shell and is fixedly connected to the output rod, and the crushing knife is located below the lower slide plate.

[0020] Preferably, one end of the driven shaft passes through the interior of the exhaust gas pipe and is fixedly connected to the linkage gear, and the driven shaft is located inside the linkage gear. A rectangular groove matching the suction fan is provided inside the protective shell, and a torsion spring is arranged between the fixed shaft and the screen plate, and the fixed shaft and the screen plate are movably connected.

[0021] Preferably, the crank connecting rod is movably connected to the transmission crank rod, and a cylindrical through hole matching the transmission crank rod is opened inside the crank connecting rod, the positioning slide rail is fixedly connected to the inner wall of the protective shell, the heating plate is located on both sides below the screen plate, and the heating plate cooperates with the combing rod.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The driven disc drives the external linkage convex rod to push the upper screen plate back and forth to swing, so that the crushed material on the screen plate is screened, which helps to improve the screening effect of the equipment. At the same time, the knife holder drives the external crushing knife to crush the material, so that screening can be achieved while crushing. The combing rod flips the fallen material back and forth, so that the area of ​​contact between the material and the air is increased, and at the same time, the material is prevented from piling up, thereby promoting the contact area between the material and the air. Therefore, it can not only improve the screening effect of the equipment, but also accelerate the drying speed of the material, thereby solving the problem of independent operation and high cost of the existing equipment.

[0024] (2) The dust and exhaust gas inside the protective shell are processed by the suction fan, so that the air flow rate on the surface of the material located on the bottom surface of the protective shell is accelerated, and the liquid on the material moves with the air flow, thereby achieving the effect of accelerating the drying of the material. At the same time, the exhaust gas and dust enter the interior of the exhaust gas pipe, and the exhaust gas and dust are processed, absorbed and filtered by multiple honeycomb filter pads and then discharged from the interior of the exhaust gas pipe, thereby preventing people from inhaling them into their bodies and affecting their health, and avoiding pollution to the environment, thereby solving the problem of direct emission of exhaust gas and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings;

[0026] Figure 1It is a structural stereogram of the protective housing of the present invention;

[0027] Figure 2 It is a structural stereogram of the crushing knife of the present invention;

[0028] Figure 3 It is a structural stereogram of the lower slide plate of the present invention;

[0029] Figure 4 It is a front cross-sectional view of the structure of the present invention;

[0030] Figure 5 This is a front cross-sectional view of the structure of the exhaust gas pipeline of the present invention;

[0031] Figure 6 The present invention Figure 5 Enlarged view of area B;

[0032] Figure 7 It is a structural stereogram of the compensation mechanism of the present invention;

[0033] Figure 8 The present invention Figure 4 Magnified view of area A.

[0034] Legend: 1. Supporting bottom plate; 2. Protective shell; 3. Heating plate; 4. Feeding pipe; 5. Lower slide plate; 6. Protective cover; 7. Driving motor; 8. Driving shaft; 9. Knife holder; 10. Crushing knife; 11. Pulley; 12. Driving belt; 13. Driving belt; 14. Clean air and powder removal mechanism; 141. Exhaust gas pipeline; 142. Guide pipe; 143. Driven shaft; 144. Driving wheel; 145. Filter screen; 146. Fan shaft; 147. Suction Air fan; 148, bevel gear; 149, positioning frame; 140, linkage gear; 15, honeycomb filter pad; 16, slow flow plate; 17, fixed shaft; 18, screen plate; 19, baffle plate; 20, compensation mechanism; 201, positioning slide rail; 202, positioning slider; 203, fixing rod; 204, crank connecting rod; 205, combing rod; 206, transmission crank rod; 207, linkage rod; 208, output rod; 209, driven disc; 200, linkage cam. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] See also Figure 1-8 As shown, the present invention is an integrated crushing and recycling method for waste lithium iron phosphate batteries, the waste lithium iron phosphate batteries are short-circuited and discharged, disassembled to obtain materials containing positive plates, and then the obtained materials are added to the crushing device for crushing treatment to obtain battery powder, which is convenient for acid aging and defluorination treatment of the battery powder, and the crushing device includes a supporting bottom plate 1, the upper surface of the supporting bottom plate 1 is fixedly connected to a protective shell 2, the protective shell 2 effectively prevents the residue generated by the equipment during crushing from splashing, and the battery powder obtained after crushing is on the inner bottom surface of the protective shell 2, and finally collected for processing, a heating plate 3 is symmetrically fixedly connected inside the protective shell 2, a feed pipe 4 is plugged into the upper end of the protective shell 2, and a lower slide plate 5 is fixedly connected inside the feed pipe 4, the material of the positive plate is poured into the inside of the feed pipe 4, so that the material is crushed and processed, and the material slides up and down on the lower slide plate 5 into the inside of the protective shell 2, when the equipment is used, the equipment is powered on to make the drive motor 7 on the protective cover 6 work;

[0038] like Figure 2As shown, a driving shaft 8 is inserted into the interior of the protective shell 2, and the driving shaft 8 cooperates with the driving motor 7. A tool holder disc 9 is sleeved on the exterior of the driving shaft 8, and a crushing knife 10 is arranged on the outer surface of the tool holder disc 9. The protective cover 6 starts to work through an external power supply, so that the protective cover 6 drives the driving shaft 8 to rotate inside the protective shell 2, and a pulley disc is sleeved on the exterior of the driving shaft 8, so that the pulley disc drives the pulley 11 to rotate through the driving belt 12, and the driving shaft 8 drives the external tool holder during the rotation process. The disc 9 rotates accordingly, so that the tool holder disc 9 drives the external crushing knife 10 to crush the material. In addition, a transmission belt 13 is sleeved on the outside of the pulley 11 and located behind the driving belt 12. A clean air powder removal mechanism 14 is fixedly connected to one side of the protective shell 2. A compensation mechanism 20 is arranged below the crushing knife 10 inside the protective shell 2. The compensation mechanism 20 includes a positioning slide rail 201. The positioning slide rail 201 is symmetrically arranged inside the protective shell 2, and a positioning slider 202 is slidably connected inside the positioning slide rail 201. , and the end of the pulley 11 close to the protective housing 2 is fixedly connected to a cylindrical shaft, and the end of the cylindrical shaft away from the pulley 11 passes through the interior of the protective housing 2 and is fixedly connected to the output rod 208, so that the pulley 11 drives the output rod 208 to rotate through the cylindrical shaft, and the output rod 208 is symmetrically fixedly connected inside the protective housing 2, so that the output rod 208 drives the external linkage convex rod 200 to rotate synchronously through the driven disc 209, so that the driven disc 209 drives the external linkage convex rod 200 to push the upper The screen plate 18 is swung, and a shielding plate 19 is fixedly connected to the upper surface of the screen plate 18, and the shielding plate 19 is located below the crushing knife 10. In the process of pushing the screen plate 18, the torsion spring connected to the screen plate 18 and the fixed shaft 17 is deformed. When the linkage convex rod 200 is separated from the screen plate 18, the screen plate 18 is affected by the torsion spring and resumes swinging, so that the crushed material on the screen plate 18 is screened, which helps to improve the screening effect of the equipment and realizes screening while crushing.

[0039] like Figure 7As shown, the front surface of the positioning slide block 202 is fixedly connected with a fixing rod 203, the outer portion of the fixing rod 203 is sleeved with a crank connecting rod 204, and the lower surface of the fixing rod 203 is fixedly connected with evenly distributed combing rods 205. During the movement of the combing rod 205, the combing rod 205 turns the fallen materials back and forth, so that the contact area between the materials and the air is increased, and at the same time, the materials are prevented from piling up. A transmission crank rod 206 is inserted into the end of the crank connecting rod 204 away from the fixing rod 203, and a linkage rod 207 is fixedly connected to the end of the transmission crank rod 206 close to the positioning slide rail 201, and the linkage rod 207 is fixedly connected to the output rod 208. The output rod 208 drives the linkage rod 207 to move accordingly, so that the linkage rod 207 drives the crank connecting rod 204 outside the transmission crank rod 206 to reciprocate while rotating in a circle, so that the crank connecting rod 204 pulls the fixed rod 203 to move synchronously, and the fixed rod 203 drives the positioning slider 202 to slide inside the positioning slide rail 201, and at the same time, the fixed rod 203 drives the combing rod 205 to turn the screened material back and forth, thereby increasing the contact area between the material and the air and accelerating the drying of the material. Therefore, it can not only achieve the effect of improving the screening effect of the equipment, but also accelerate the material drying speed, solving the problems of independent operation and high cost of the existing equipment.

[0040] Embodiment 2:

[0041] A transmission belt 13 is sleeved on the outside of the pulley 11 and located behind the driving belt 12. A clean air and powder removal mechanism 14 is fixedly connected to one side of the protective shell 2, and the clean air and powder removal mechanism 14 includes an exhaust pipe 141. A filter screen 145 is arranged inside one side of the exhaust pipe 141. A guide pipe 142 is fixedly connected to the front surface of the exhaust pipe 141. A driven shaft 143 is inserted into the inside of the guide pipe 142. A transmission wheel 144 is sleeved on the outside of the driven shaft 143, and the transmission wheel 144 cooperates with the transmission belt 13, so that when the pulley 11 rotates, the driven shaft 143 inside the transmission wheel 144 is driven to rotate through the transmission belt 13. As the driven shaft 143 rotates, the external linkage gear 140 is driven to rotate inside the exhaust pipe 141, and the exhaust pipe 141 is connected to the protective shell 2 on one side thereof. There is a blade shaft 146, and a positioning frame 149 is sleeved on the outside of the blade shaft 146, and the positioning frame 149 is fixedly connected to the protective shell 2. The end of the blade shaft 146 away from the suction fan 147 is fixedly connected to the bevel gear 148. Through the transmission between the gears, the linkage gear 140 drives the bevel gear 148 to rotate, so that the bevel gear 148 drives the suction fan 147 to rotate through the blade shaft 146, so that the suction fan 147 generates wind force, so that the suction fan 147 processes the dust and exhaust gas inside the protective shell 2. When the suction fan 147 rotates, the air flow rate on the surface of the material located on the bottom surface of the protective shell 2 is accelerated. According to Bernoulli's principle (in a water flow or air flow, if the speed is small, the pressure is large, and if the speed is large, the pressure is small), it can be known that the liquid on the material moves with the air flow, thereby achieving the effect of accelerating the drying of the material;

[0042] As the suction fan 147 rotates, the exhaust gas and dust enter the exhaust pipe 141. Figure 5 As shown, a honeycomb filter pad 15 is provided inside the exhaust pipe 141 below the linkage gear 140, and a slow flow plate 16 is fixedly connected to the inner wall of the exhaust pipe 141 below the honeycomb filter pad 15, so that the exhaust gas and dust are discharged from the exhaust pipe 141 after being processed, absorbed and filtered by multiple honeycomb filter pads 15, and the fan shaft 146 inside the exhaust pipe 141 has a delayed buffering effect, so that the exhaust gas and dust can fully contact the honeycomb filter pad 15, so the suction fan 147 is rotated through the transmission between the gears to accelerate the internal airflow of the protective shell 2, promote the drying of the material, and at the same time, the exhaust gas and dust inside the protective shell 2 can be processed to achieve the effect of promoting the drying of the equipment, and at the same time, the exhaust gas and dust can be purified to avoid people inhaling them into the body and affecting their health, and to avoid pollution to the environment, thereby solving the problem of direct emission of existing exhaust gas and dust.

[0043] The working principle of the present invention is as follows: when the device is used, the power supply is turned on to make the driving motor 7 on the protective cover 6 work, and the material of the positive electrode sheet is poured into the inside of the feed pipe 4, so as to crush the material, so that the protective cover 6 drives the driving shaft 8 to rotate inside the protective shell 2, and the outer part of the driving shaft 8 is sleeved with a pulley disk, so that the pulley disk drives the pulley 11 to rotate through the driving belt 12, and the driving shaft 8 drives the external knife holder disk 9 to rotate during the rotation process, so that the knife holder disk 9 drives the external crushing knife 10 to crush the material, and the pulley 11 drives the output rod 208 to rotate through the cylindrical shaft, so that the output rod 208 drives the driven disc 209 to The external linkage convex rod 200 rotates synchronously, so that the driven disc 209 drives the external linkage convex rod 200 to push the upper screen plate 18 back and forth to swing, so that the crushed material on the screen plate 18 is screened, thereby helping to improve the screening effect of the equipment, and at the same time realize screening while crushing. In the process of the combing rod 205 moving, the combing rod 205 turns the fallen material back and forth, so that the area of ​​contact between the material and the air is increased, and at the same time, the material is prevented from piling up, thereby promoting the contact area between the material and the air and accelerating the drying of the material. Therefore, it can achieve the effect of improving the screening effect of the equipment and accelerating the drying speed of the material, solving the problems of independent operation and high cost of the existing equipment.

[0044] When the pulley 11 rotates, the driven shaft 143 inside the driving wheel 144 is driven to rotate through the transmission belt 13. As the driven shaft 143 rotates, the external linkage gear 140 is driven to rotate inside the exhaust pipe 141. The linkage gear 140 drives the bevel gear 148 to rotate through the transmission between the gears, so that the bevel gear 148 drives the suction fan 147 to rotate through the fan shaft 146, so that the suction fan 147 generates wind force, so that the suction fan 147 processes the dust and exhaust gas inside the protective shell 2. When the suction fan 147 rotates, the inner bottom surface of the protective shell 2 is The air velocity on the surface of the material is accelerated, so that the liquid on the material moves with the air flow, thereby achieving the effect of accelerating the drying of the material. As the suction fan 147 rotates, the exhaust gas and dust enter the interior of the exhaust gas pipe 141, and the exhaust gas and dust are processed, absorbed and filtered by multiple honeycomb filter pads 15 and then discharged from the interior of the exhaust gas pipe 141. By processing the exhaust gas and dust inside the protective shell 2, the effect of promoting the drying of the equipment is achieved, and at the same time, the exhaust gas and dust can be purified to prevent people from inhaling them into the body and affecting their health, and to avoid pollution to the environment, thereby solving the problem of direct emission of existing exhaust gas and dust.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated crushing and recycling method for waste lithium iron phosphate batteries, characterized in that: The following steps are involved: Step 1: short-circuit discharge and dismantle the waste lithium iron phosphate battery to obtain a material containing a positive electrode sheet, and then add the obtained material into a crushing device for crushing to obtain battery powder, so as to facilitate acid aging and defluorination treatment of the battery powder; Step 2: During the crushing process, the positive electrode sheet material is poured into the feed pipe (4) to crush the material. The material slides up and down on the lower slide plate (5) into the protective housing (2). The material is crushed by the crushing knife (10) on the knife holder (9). The crushed material falls onto the screen plate (18). During the crushing operation, the drive belt (12) drives the pulley (11) to rotate, causing the driven disc (209) to rotate accordingly, so that the driven disc (209) drives the external linkage convex rod (200) to push the upper screen plate (18) back and forth to swing, thereby achieving screening while crushing. Step 3: During screening, the driven disc (209) drives the linkage rod (207) to move via the output rod (208), so that the linkage rod (207) drives the crank connecting rod (204) outside the transmission crank rod (206) to reciprocate while rotating in a circle, so that the crank connecting rod (204) pulls the fixed rod (203) to move synchronously, and the fixed rod (203) drives the positioning slider (202) to slide inside the positioning slide rail (201), and at the same time, the fixed rod (203) drives the combing rod (205) to flip the screened material back and forth, thereby increasing the contact area between the material and the air and accelerating the drying of the material; Step 4: The drive wheel (144) at the other end of the drive belt (13) is driven to rotate by the pulley (11), so that the drive wheel (144) drives the linkage gear (140) to rotate synchronously through the driven shaft (143), and the air intake fan (147) is rotated through the transmission between the gears, thereby accelerating the internal air flow of the protective shell (2) according to the Bernoulli principle, promoting the drying of the material, and processing the exhaust gas and dust inside the protective shell (2) and discharging them after being processed by the multiple honeycomb filter pads (15) inside the exhaust pipe (141), thereby achieving the effect of protecting the environment and promoting the drying of the material; Step 5: The battery powder obtained after the treatment is acid-dissolved, which helps to improve the efficiency of the acid-dissolved on the one hand, and avoids the influence of impurities on the other hand. After the acid-dissolved, the required lithium iron phosphate or lithium iron manganese phosphate is obtained after filtering, batching, dehydration, drying and sintering; The crushing device comprises a supporting base plate (1), the upper surface of the supporting base plate (1) is fixedly connected with a protective shell (2), the interior of the protective shell (2) is symmetrically fixedly connected with a heating plate (3), the upper end of the protective shell (2) is internally plugged with a feed pipe (4), the interior of the feed pipe (4) is fixedly connected with a lower slide plate (5), the front surface of the protective shell (2) is fixedly connected with a protective cover (6), the side of the protective cover (6) away from the protective shell (2) is fixedly connected with a driving motor (7), the interior of the protective shell (2) is plugged with a driving shaft (8), and the driving shaft (8) and the driving motor (7) cooperate with each other, the exterior of the driving shaft (8) is sleeved with a tool holder disc (9), and the outer surface of the tool holder disc (9) is provided with a crushing knife (10); A pulley (11) is rotatably connected to one side of the protective housing (2) close to the drive motor (7), a drive belt (12) is sleeved on the outside of the pulley (11), and the drive belt (12) cooperates with the drive shaft (8), a transmission belt (13) is sleeved on the outside of the pulley (11) behind the drive belt (12), a clean air and powder removal mechanism (14) is fixedly connected to one side of the protective housing (2), and a compensation mechanism (20) is provided inside the protective housing (2) below the crushing knife (10); The clean air and powder removal mechanism (14) comprises an exhaust gas pipe (141), a guide pipe (142) is fixedly connected to the front surface of the exhaust gas pipe (141), a driven shaft (143) is inserted into the interior of the guide pipe (142), a driving wheel (144) is sleeved on the exterior of the driven shaft (143), and the driving wheel (144) cooperates with the driving belt (13), a filter gauze (145) is arranged inside one side of the exhaust gas pipe (141), and a filter mesh (145) is arranged on one side of the exhaust gas pipe (141) close to the protective housing (2). A fan blade rotating shaft (146) is rotatably connected to the inner side, an air suction fan (147) is sleeved on the outer side of the fan blade rotating shaft (146), and the air suction fan (147) is located inside the protective shell (2), a positioning frame (149) is sleeved on the outer side of the fan blade rotating shaft (146), and the positioning frame (149) is fixedly connected to the protective shell (2), and an end of the fan blade rotating shaft (146) away from the air suction fan (147) is fixedly connected to a bevel gear (148), and the outer surface of the bevel gear (148) is meshingly connected to a linkage gear (140); A honeycomb filter pad (15) is provided inside the exhaust gas pipe (141) and is located below the linkage gear (140); a slow flow plate (16) is fixedly connected to the inner wall of the exhaust gas pipe (141) and is located below the honeycomb filter pad (15); a fixed shaft (17) is fixedly connected to the inside of the protective shell (2); a screen plate (18) is sleeved on the outside of the fixed shaft (17); a shielding plate (19) is fixedly connected to the upper surface of the screen plate (18), and the shielding plate (19) is located below the crushing knife (10); The compensation mechanism (20) comprises a positioning slide rail (201), the interior of the positioning slide rail (201) is slidably connected to a positioning slider (202), the front surface of the positioning slider (202) is fixedly connected to a fixing rod (203), the exterior of the fixing rod (203) is sleeved with a crank connecting rod (204), the lower surface of the fixing rod (203) is fixedly connected to evenly distributed combing rods (205), and the crank connecting rod (204) is away from the fixing rod (203). A transmission bent rod (206) is inserted into one end of the transmission bent rod (206), a linkage rod (207) is fixedly connected to one end of the transmission bent rod (206) close to the positioning slide rail (201), an output rod (208) is fixedly connected to the side of the linkage rod (207) away from the transmission bent rod (206), a driven disc (209) is fixedly connected to one end of the output rod (208) away from the linkage rod (207), and a linkage convex rod (200) is sleeved on the outside of the driven disc (209).

2. The integrated crushing and recycling method for waste lithium iron phosphate batteries according to claim 1 is characterized in that: The end of the driving shaft (8) close to the protective cover (6) is externally sleeved with a pulley disk that matches the driving belt (12), and the outer surface of the pulley disk is sleeved with multiple driving belts (12). The outer surface of the protective cover (6) is symmetrically provided with through hole grooves that match the driving belt (12). The end of the pulley (11) close to the protective shell (2) is fixedly connected to a cylindrical shaft, and the end of the cylindrical shaft away from the pulley (11) passes through the interior of the protective shell (2) and is fixedly connected to the output rod (208). The crushing knife (10) is located below the lower slide plate (5).

3. The integrated crushing and recycling method for waste lithium iron phosphate batteries according to claim 1 is characterized in that: One end of the driven rotating shaft (143) passes through the interior of the exhaust pipe (141) and is fixedly connected to the linkage gear (140), and the driven rotating shaft (143) is located inside the linkage gear (140). A rectangular groove matching the suction fan (147) is provided inside the protective shell (2). A torsion spring is provided between the fixed shaft (17) and the screen plate (18), and the fixed shaft (17) and the screen plate (18) are movably connected.

4. The integrated crushing and recycling method of waste lithium iron phosphate batteries according to claim 1 is characterized in that: The crank connecting rod (204) is movably connected to the transmission crank rod (206), and a cylindrical through hole matching the transmission crank rod (206) is provided inside the crank connecting rod (204). The positioning slide rail (201) is fixedly connected to the inner wall of the protective shell (2). The heating plate (3) is located on both sides below the screen plate (18), and the heating plate (3) and the combing rod (205) cooperate with each other.

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