Lithium extraction device for lithium iron phosphate battery production

Abstract

The invention relates to the technical field of recycling of lithium iron phosphate batteries, in particular to a lithium extraction device for production of lithium iron phosphate batteries, which comprises an accommodating assembly including collecting assemblies fixed on two sides in the accommodating assembly, guide assemblies fixed at the end parts of the collecting assemblies, and leakage-proof assemblies rotating at the end parts of the guide assemblies, the device comprises a collecting assembly, a guiding assembly fixed to the bottom of the collecting assembly, a collecting assembly fixed to the bottom of the collecting assembly, a stirring assembly fixed to the center of the containing assembly, a transmission assembly fixed to the bottom of the stirring assembly and a raising assembly fixed to the bottom of the transmission assembly. And through cooperation of the stirring assembly, the transmission assembly and the raising assembly, the iron phosphorus slag collecting efficiency can be improved, the interior of the containing assembly can be cleaned, and therefore the service life of the device can be prolonged, and the leaching efficiency can be kept.

Description

Technical Field

[0001] The present invention relates to the technical field of recycling of lithium iron phosphate batteries, and particularly to a lithium extraction device for the production of lithium iron phosphate batteries. Background Art

[0002] Lithium iron phosphate batteries use lithium iron phosphate as the cathode material. When such batteries reach the end of their service life, they need to be professionally disassembled and recycled. The recycled battery materials will be placed in a special device, and the lithium iron phosphate in them will be extracted by the leaching method. After processing, it can be used again in the production of lithium iron phosphate batteries.

[0003] When using the leaching method to extract lithium elements from the cathode of lithium iron phosphate batteries in a barrel with a leaching agent, impurities such as iron phosphate slag will be generated. The iron phosphate slag will block the pipelines in the barrel, etc. Generally, a filter screen is used to solve this problem, but the filter screen will be blocked when there is too much iron phosphate slag and it is not easy to handle, so improvements are needed. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title, but such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above or the prior art, the present invention is proposed.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a containing component, which includes a collecting component fixed on both sides inside the containing component, a guiding component fixed at the end of the collecting component, a leak-proof component rotating at the end of the guiding component, a concentrating component fixed at the bottom of the collecting component, a stirring component fixed at the center of the containing component, a transmission component fixed at the bottom of the stirring component, and a lifting component fixed at the bottom of the transmission component.

[0007] As a preferred scheme of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, wherein: the containing component includes a leaching tank, an installation groove is provided at the bottom of the leaching tank, a filter plate is fixed on the inner wall of the leaching tank, and reserved grooves are provided on both sides of the filter plate.

[0008] As a preferred scheme of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, wherein: the collecting component includes arc-shaped shells fixed on both sides of the inner wall of the leaching tank, a circular groove is provided at the bottom of the arc-shaped shells, an inclined surface is provided at the end of the arc-shaped shells, and a first filter screen is fixed at one end of the arc-shaped shells located on the inclined surface.

[0009] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The guiding component includes a diversion plate fixed to the end of the collection component. The end of the diversion plate is provided with a conical opening, and both sides of the inner wall of the diversion plate are provided with arc-shaped grooves.

[0010] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The leak-proof component includes a shaft rod rotatably disposed at the corresponding arc-shaped groove on the inner wall of the diversion plate, three arc-shaped plates fixed to the outer wall of each shaft rod, a gear fixed to the top of the shaft rod, and two meshing gears.

[0011] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The concentration component includes a receiving tank at the bottom of the receiving component, inlet pipes fixed to both sides of the receiving tank, the inlet pipes are connected to the collection component, a discharge valve fixed to the bottom end of the outer wall of the receiving tank, a cover plate movably connected to the bottom end of the receiving tank, a support rod fixed to the inner wall of the bottom end of the cover plate, the length of the support rod is higher than that of the discharge valve, and a second filter screen fixed to the top of the support rod.

[0012] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The stirring component includes a motor fixed to the top end of the receiving component, a central rod corresponding to the inside of the receiving component at the driving end of the motor, and stirring blades fixed to the outer wall of the central rod.

[0013] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The transmission component includes a connection block fixed to the bottom of the stirring component, a hollow tube movably connected to the outer wall of the connection block, an inclined groove provided on the inner wall of the hollow tube, a sliding rod slidably disposed inside the inclined groove, and the sliding rod is connected to the connection block.

[0014] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention, the following components are included: The lifting component includes a central block fixed to the bottom of the hollow tube, three fixing plates fixed to the outer wall of the central block, a scraping plate slidably disposed at the bottom end of the fixing plate, and a spring fixed between the scraping plate and the fixing plate.

[0015] The beneficial effects of the lithium extraction device for the production of lithium iron phosphate batteries of the present invention are as follows: Through the collection component, the guiding component, and the leak-proof component, after the leaching is completed, the iron and phosphorus slag in the liquid can be collected, preventing the problem that the iron and phosphorus slag blocks the inside of the receiving component. Through the cooperation of the stirring component, the transmission component, and the lifting component, the collection efficiency of the iron and phosphorus slag can be improved, and the inside of the receiving component can be cleaned. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is an overall schematic diagram of a lithium extraction device for the production of lithium iron phosphate batteries.

[0018] Figure 2 It is a schematic diagram of the internal structure of a lithium extraction device for the production of lithium iron phosphate batteries.

[0019] Figure 3 It is a schematic diagram of the accommodation component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0020] Figure 4 It is a schematic diagram of the collection component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0021] Figure 5 It is a schematic diagram of the partial structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0022] Figure 6 It is a schematic diagram of the guiding component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0023] Figure 7 It is a schematic diagram of the leak-proof component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0024] Figure 8 It is a schematic diagram of the concentration component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0025] Figure 9 For the present invention Figure 8 Schematic diagram of the structure at location A.

[0026] Figure 10 It is a schematic diagram of the transmission component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0027] Figure 11 It is a schematic diagram of the lifting component structure in a lithium extraction device for the production of lithium iron phosphate batteries.

[0028] In the figure: 100, accommodation component; 200, collection component; 300, guiding component; 400, leak-proof component; 500, concentration component; 600, stirring component; 700, transmission component; 800, lifting component; 101, leaching tank; 102, installation groove; 103, filter plate; 104, reserved groove; 201. Arc-shaped shell; 202. Circular groove; 203. Inclined surface; 204. First filter screen; 301. Deflector; 302. Conical opening; 303. Arc-shaped groove; 401. Shaft rod; 402. Arc-shaped plate; 403. Gear; 501. Receiving tank; 502. Inlet pipe; 503. Discharge valve; 504. Cover plate; 505. Support rod; 506. Second filter screen; 601. Motor; 602. Central rod; 603. Stirring blade; 701. Connecting block; 702. Hollow pipe; 703. Inclined groove; 704. Slide rod; 801. Central block; 802. Fixed plate; 803. Scraper; 804. Spring. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0030] Example, refer to Figures 1 to 11 , which is an embodiment of the present invention. This embodiment provides a lithium extraction device for the production of lithium iron phosphate batteries, which can achieve the effect of avoiding the blockage of the internal pipelines and filter screens of the leaching tank by iron-phosphorus slag during the leaching of the positive electrode of lithium iron phosphate batteries. It includes a receiving component 100, which includes a collection component 200 fixed on both sides inside the receiving component 100, a guiding component 300 fixed at the end of the collection component 200, a leak-proof component 400 rotating at the end of the guiding component 300, a concentration component 500 fixed at the bottom of the collection component 200, a stirring component 600 fixed at the center of the receiving component 100, a transmission component 700 fixed at the bottom of the stirring component 600, and a lifting component 800 fixed at the bottom of the transmission component 700. When the receiving component 100 performs the leaching method, the inside of the receiving component 100 can be rotated and stirred by the stirring component 600, which can accelerate the mixing efficiency of the positive electrode of the lithium iron phosphate battery and the leaching agent inside the receiving component 100, thereby increasing the leaching efficiency. When the stirring component 600 rotates counterclockwise, the liquid and iron-phosphorus slag are guided from the guiding component 300 to the collection component 200. Therefore, the iron-phosphorus slag generated during the leaching of the positive electrode of the lithium iron phosphate battery will enter the collection component 200 and then can be introduced into the concentration component 500. During this process, the stirring component 600 can drive the lifting component 800 to rotate through the transmission component 700. The lifting component 800 can lift the iron-phosphorus slag deposited at the bottom of the inner wall of the receiving component 100, and then it is collected by the collection component 200, which can avoid the problem of iron-phosphorus slag depositing at the bottom and blocking the inside of the receiving component 100.

[0031] Specifically, as Figure 3Among them, the accommodation component 100 includes a leaching tank 101. An installation groove 102 is provided at the bottom of the leaching tank 101, and a filter plate 103 is fixed to the inner wall of the leaching tank 101. Reserved grooves 104 are provided on both sides of the filter plate 103. During use, the positive electrode of the lithium iron phosphate battery and the leaching agent can be added into the leaching tank 101 to extract lithium elements by the leaching method.

[0032] Furthermore, as Figure 4 shown in, the collection component 200 includes arc-shaped shells 201 fixed to both sides of the inner wall of the leaching tank 101. A circular groove 202 is provided at the bottom of the arc-shaped shell 201, and an inclined surface 203 is provided at the end of the arc-shaped shell 201. A first filter screen 204 is fixed to the arc-shaped shell 201 at one end of the inclined surface 203. Since the first filter screen 204 is located at the inclined surface 203, the first filter screen 204 is also in an inclined state. During use, when the stirring component 600 stirs, the inclined surface 203 and the first filter screen 204 at the end of the arc-shaped shell 201 will cause the liquid, iron phosphate slag, and the positive electrode of the lithium iron phosphate battery to pass through the inclined surface 203 of the arc-shaped shell 201 due to the reverse rotation. The inclined first filter screen 204 can prevent the iron phosphate slag and the positive electrode of the lithium iron phosphate battery from entering the arc-shaped shell 201, avoiding the iron phosphate slag and the positive electrode of the lithium iron phosphate battery from entering the arc-shaped shell 201 during leaching. After the leaching method is completed, by starting the stirring component 600 counterclockwise, the liquid and iron phosphate slag can be driven to enter through the opening of the arc-shaped shell 201. Thus, the liquid can continue to flow through the first filter screen 204, while the iron phosphate slag will be collected in the arc-shaped shell 201. Due to the inclined first filter screen 204 and the weight of the iron phosphate slag itself, the iron phosphate slag can be guided through the circular groove 202 to the concentration component 500.

[0033] Furthermore, as Figure 6 shown in, the guiding component 300 includes a diversion plate 301 fixed to the end of the collection component 200. The diversion plate 301 is fixed at the opening of the arc-shaped shell 201 in the collection component 200. A conical opening 302 is provided at the end of the diversion plate 301, and arc-shaped grooves 303 are provided on both sides of the inner wall of the diversion plate 301. During use, the conical opening 302 of the diversion plate 301 can increase the probability of the iron phosphate slag in the liquid entering, thereby improving the efficiency of cleaning the iron phosphate slag.

[0034] Furthermore, as Figure 5 and 7In it, the leakage prevention component 400 includes a shaft rod 401 rotatably disposed at the corresponding arc-shaped groove 303 on the inner wall of the diversion plate 301, three arc-shaped plates 402 fixed to the outer wall of each shaft rod 401, the arc-shaped plates 402 on the two shaft rods 401 are arranged in a crosswise manner, a gear 403 fixed to the top of the shaft rod 401, and the two gears 403 are meshed with each other. During use, the liquid flow acts on the arc-shaped plate 402, and the arc-shaped plate 402 drives the shaft rod 401 and the gear 403 to rotate. Due to the meshing state of the two gears 403, the arc-shaped plates 402 on the two shaft rods 401 will always be in a crosswise state. The gap in the cross can drive the iron-phosphorus slag in the liquid into the arc-shaped shell 201 and prevent the iron-phosphorus slag from detaching from the arc-shaped shell 201.

[0035] Furthermore, as Figure 8 , 9 In it, the concentration component 500 includes a receiving tank 501 at the bottom of the receiving component 100. The receiving tank 501 is fixed at the installation groove 102 in the receiving component 100, an inlet pipe 502 fixed to both sides of the receiving tank 501. The middle part of the inlet pipe 502 is connected to the reserved groove 104, the inlet pipe 502 is connected to the collection component 200, and the inlet pipe 502 is fixed at the circular groove 202 at the bottom of the arc-shaped shell 201 in the collection component 200, a discharge valve 503 fixed to the outer wall bottom end of the receiving tank 501, a cover plate 504 pivotally connected to the bottom end of the receiving tank 501. The cover plate 504 and the bottom of the receiving tank 501 are threadedly connected, a support rod 505 fixed to the inner wall bottom end of the cover plate 504, the length of the support rod 505 is higher than that of the discharge valve 503, and a second filter screen 506 fixed to the top of the support rod 505. During use, the iron-phosphorus slag is guided into the receiving tank 501 through the circular groove 202 and the inlet pipe 502 for concentration. The iron-phosphorus slag at the inner bottom end of the receiving tank 501 is supported by the second filter screen 506. Since the second filter screen 506 is higher than the discharge valve 503, when cleaning the receiving tank 501, the liquid in the receiving tank 501 can be discharged through the discharge valve 503, and then by removing the cover plate 504, the support rod 505 and the second filter screen 506, the iron-phosphorus slag in the receiving tank 501 can be discharged from the bottom of the receiving tank 501, thereby concentrating the cleaning of the iron-phosphorus slag and separating and discharging the liquid and the iron-phosphorus slag, which is convenient for subsequent operations.

[0036] Furthermore, as Figure 2Among them, the stirring assembly 600 includes a motor 601 fixed to the top of the accommodating assembly 100. The motor 601 is fixed on the top of the leaching tank 101 in the accommodating assembly 100, and its driving end penetrates into the interior of the leaching tank 101. A central rod 602 corresponding to the interior of the accommodating assembly 100 is fixed to the driving end of the motor 601, and stirring blades 603 are fixed to the outer wall of the central rod 602. During use, the motor 601 drives the central rod 602 and the stirring blades 603 to rotate. The blades of the stirring blades 603 that are inclined downward will mix the liquid and rotate downward. During leaching, the leaching agent and the positive electrode of the lithium iron phosphate battery are quickly leached. After leaching is completed, by starting the motor 601 to drive the central rod 602 and the stirring blades 603 to rotate counterclockwise, the stirring blades 603 can then guide the liquid to rotate upward, thereby increasing the probability of iron and phosphorus slag in the liquid entering the collection assembly 200 and improving the efficiency of cleaning iron and phosphorus slag in the liquid.

[0037] Furthermore, as Figure 10 , 11 Among them, the transmission assembly 700 includes a connecting block 701 fixed to the bottom of the stirring assembly 600. The connecting block 701 is fixed to the central rod 602 in the stirring assembly 600. A hollow tube 702 is movably connected to the outer wall of the connecting block 701. An inclined groove 703 is provided on the inner wall of the hollow tube 702, and a sliding rod 704 slides inside the inclined groove 703. The sliding rod 704 is connected to the connecting block 701; The lifting assembly 800 includes a central block 801 fixed to the bottom of the hollow tube 702, three fixing plates 802 fixed to the outer wall of the central block 801, a scraper 803 sliding at the bottom end of the fixing plates 802. The scraper 803 is initially closer to the filter plate 103. A spring 804 is fixed between the scraper 803 and the fixing plates 802. When the central rod 602 rotates clockwise, it can drive the connecting block 701 and the sliding rod 704 to rotate. Thus, the sliding rod 704 will rotate towards the bottom of the inclined groove 703, and then drive the hollow tube 702 to move upward. During this process, the sliding rod 704 driving the hollow tube 702 to move upward has an inertial effect, and the hollow tube 702 will drive the central block 801, the fixing plates 802, and the scraper 803 away from the filter plate 103. When the central rod 602 rotates counterclockwise, the central rod 602 will drive the transmission assembly 700 and the lifting assembly 800 to rotate. During this process, due to the inertial effect, the sliding rod 704 is at the top of the inclined groove 703, so at this time the scraper 803 is closer to the filter plate 103. When the central block 801 rotates, it will drive the fixing plates 802 and the scraper 803 to scrape up the iron and phosphorus slag on the filter plate 103, making it easier for the iron and phosphorus slag to enter the collection assembly 200 and cleaning the iron and phosphorus slag blocked on the filter plate 103 to prevent the filter plate 103 from being blocked.

[0038] During use, by adding the positive electrode of a lithium iron phosphate battery and a leaching agent into the leaching tank 101, etc., the leaching method is used to extract lithium elements. During this process, the motor 601 can be started to drive the central rod 602 and the stirring blades 603 to rotate. The blades of the stirring blades 603 that incline downward will mix the liquid and rotate downward, which can improve the leaching efficiency. When the leaching is completed, the motor 601 drives the central rod 602 and the stirring blades 603 to rotate counterclockwise. Thus, the stirring blades 603 can guide the liquid upward for rotation. Also, when the central rod 602 rotates counterclockwise, the central rod 602 will drive the transmission assembly 700 and the lifting assembly 800 to rotate. During this process, the sliding rod 704 is at the top of the inclined groove 703 due to inertia. Therefore, at this time, the scraping plate 803 is closer to the filter plate 103. So when the central block 801 rotates, it will drive the fixed plate 802 and the scraping plate 803 to scrape up the iron phosphate slag on the filter plate 103, making it easier for the iron phosphate slag to enter the collection assembly 200. Also, the scraping plate 803 can clean the iron phosphate slag stuck on the filter plate 103. If the iron phosphate slag is stuck tightly in the holes of the filter plate 103, the filter plate 103 will move into the fixed plate 802 and compress the spring 804 to avoid damage during this process. Then, after passing through the blockage, the spring 804 can drive the scraping plate 803 to reset. When the above-mentioned stirring blades 603 and scraping plates 803 rotate, the iron phosphate slag in the liquid becomes more active in water, and it is more likely to enter the arc-shaped shell 201 through the conical opening 302 of the diversion plate 301. During this process, the liquid flow acts on the arc-shaped plate 402, and the arc-shaped plate 402 drives the shaft rod 401 and the gear 403 to rotate. Because the two gears 403 are in a meshing state, the arc-shaped plates 402 on the two shaft rods 401 will be in a crossed state. The gaps in the crossing can drive the iron phosphate slag in the liquid into the arc-shaped shell 201 and prevent the iron phosphate slag from separating from the arc-shaped shell 201. When the iron phosphate slag enters from the opening of the arc-shaped shell 201, the liquid can continue to flow through the first filter screen 204, and the iron phosphate slag will be collected in the arc-shaped shell 201. Due to the inclined first filter screen 204 and the weight of the iron phosphate slag itself, the iron phosphate slag can be guided through the round groove 202 and the inlet pipe 502 into the storage tank 501 for concentration. The iron phosphate slag at the bottom of the storage tank 501 is supported by the second filter screen 506. Because the second filter screen 506 is higher than the discharge valve 503, when cleaning the storage tank 501, the liquid in the storage tank 501 can be discharged through the discharge valve 503. Then, by removing the cover plate 504, the support rod 505, and the second filter screen 506, the iron phosphate slag in the storage tank 501 can be discharged from the bottom of the storage tank 501, so as to concentrate the cleaning of the iron phosphate slag and separate and discharge the liquid and the iron phosphate slag, which is convenient for subsequent operations. Also, during this leaching process, because the stirring assembly 600 can drive the water flow in the accommodation assembly 100 to rotate clockwise and counterclockwise, the iron phosphate slag blocked on the first filter screen 204 will detach due to the slight deformation of the first filter screen 204 caused by the repeated driving of the water flow, so it has a cleaning function.

[0039] In summary, through the collection component 200, the guiding component 300, and the leak-proof component 400, after the leaching is completed, the iron-phosphorus slag in the liquid can be collected to prevent the problem of the iron-phosphorus slag blocking the inside of the accommodating component 100. Through the cooperation of the stirring component 600, the transmission component 700, and the lifting component 800, the collection efficiency of the iron-phosphorus slag can be improved, and the inside of the accommodating component 100 can be cleaned.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A lithium extraction device for the production of lithium iron phosphate batteries, characterized in that: Comprising, A containing component (100), which includes a collection component (200) fixed to both sides inside the containing component (100), a guiding component (300) fixed to the end of the collection component (200), a leak-proof component (400) rotating at the end of the guiding component (300), a concentrating component (500) fixed to the bottom of the collection component (200), a stirring component (600) fixed to the center of the containing component (100), a transmission component (700) fixed to the bottom of the stirring component (600), and a lifting component (800) fixed to the bottom of the transmission component (700).

2. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 1, characterized in that: The containing component (100) includes a leaching tank (101), an installation groove (102) is provided at the bottom of the leaching tank (101), a filter plate (103) fixed to the inner wall of the leaching tank (101), and reserved grooves (104) are provided on both sides of the filter plate (103).

3. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 2, characterized in that: The collection component (200) includes arc-shaped shells (201) fixed to both sides of the inner wall of the leaching tank (101), a circular groove (202) is provided at the bottom of the arc-shaped shells (201), an inclined surface (203) is provided at the end of the arc-shaped shells (201), and a first filter screen (204) fixed to the arc-shaped shells (201) at one end of the inclined surface (203).

4. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 1, characterized in that: The guiding component (300) includes a diversion plate (301) fixed to the end of the collection component (200), a conical opening (302) is provided at the end of the diversion plate (301), and arc-shaped grooves (303) are provided on both sides of the inner wall of the diversion plate (301).

5. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 4, characterized in that: The leak-proof component (400) includes a shaft rod (401) rotating at the corresponding arc-shaped grooves (303) on the inner wall of the diversion plate (301), three arc-shaped plates (402) fixed to the outer wall of each shaft rod (401), a gear (403) fixed to the top of the shaft rod (401), and the two gears (403) are meshed with each other.

6. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 1, characterized in that: The concentrating component (500) includes a containing tank (501) at the bottom of the containing component (100), inlet pipes (502) fixed to both sides of the containing tank (501), the inlet pipes (502) are connected to the collection component (200), a discharge valve (503) fixed to the bottom end of the outer wall of the containing tank (501), a cover plate (504) movably connected to the bottom end of the containing tank (501), a support rod (505) fixed to the inner wall of the bottom end of the cover plate (504), the length of the support rod (505) is higher than that of the discharge valve (503), and a second filter screen (506) fixed to the top of the support rod (505).

7. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 1, characterized in that: The stirring component (600) includes a motor (601) fixed to the top end of the containing component (100), a central rod (602) corresponding to the inside of the containing component (100) fixed to the driving end of the motor (601), and stirring blades (603) fixed to the outer wall of the central rod (602).

8. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 1, characterized in that: The transmission component (700) includes a connection block (701) fixed to the bottom of the stirring component (600), a hollow pipe (702) movably connected to the outer wall of the connection block (701), an inclined groove (703) is provided on the inner wall of the hollow pipe (702), a sliding rod (704) sliding inside the inclined groove (703), and the sliding rod (704) is connected to the connection block (701).

9. The lithium extraction device for the production of lithium iron phosphate batteries according to claim 8, characterized in that: The lifting component (800) includes a central block (801) fixed to the bottom of the hollow tube (702), three fixing plates (802) fixed to the outer wall of the central block (801), a scraping plate (803) slidably disposed at the bottom end of the fixing plates (802), and a spring (804) fixed between the scraping plate (803) and the fixing plates (802).

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