A lithium extraction device for lithium iron phosphate battery production

Abstract

The present invention relates to the technical field of lithium iron phosphate battery recycling and utilization, in particular to a lithium extraction device for lithium iron phosphate battery production. The device comprises a containing assembly, which includes a collecting assembly fixed to both sides of the inside of the containing assembly, a guiding assembly fixed to the end of the collecting assembly, a leak-proof assembly rotating on the end of the guiding assembly, a concentrating 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 lifting assembly fixed to the bottom of the transmission assembly. The present invention uses the collecting assembly, the guiding assembly, and the leak-proof assembly to collect iron-phosphorus slag in the liquid after leaching is completed, thereby preventing the iron-phosphorus slag from clogging the inside of the containing assembly. The cooperation of the stirring assembly, the transmission assembly, and the lifting assembly can improve the iron-phosphorus slag collection efficiency and clean the inside of the containing assembly, thereby improving the service life of the device and maintaining the leaching efficiency.

Description

Technical Field

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

[0002] Lithium iron phosphate batteries use lithium iron phosphate as the positive electrode material. When this type of battery reaches the end of its service life, it needs to be professionally disassembled and recycled. The recycled battery materials will be placed in a special device and the lithium iron phosphate will be extracted by leaching. After processing, it can continue to be used in the production of lithium iron phosphate batteries.

[0003] When using the positive electrode of a lithium iron phosphate battery and a leaching agent in a barrel to extract lithium elements by leaching, impurities such as iron-phosphorus slag will be produced. The iron-phosphorus slag will clog the pipes in the barrel, etc. Generally, a filter is used to solve this problem. However, the filter will be clogged when there is too much iron-phosphorus slag, making it difficult to handle, and thus needs to be improved. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in 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 assembly, which includes a collecting assembly fixed on both sides of the containing assembly, a guide assembly fixed to the end of the collecting assembly, a leak-proof assembly rotating on the end of the guide assembly, a concentrating 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 lifting assembly fixed to the bottom of the transmission assembly; the containing assembly includes a leaching tank, a mounting groove is provided at the bottom of the leaching tank, a filter plate fixed to the inner wall of the leaching tank, and reserved grooves are provided on both sides of the filter plate; the collecting assembly includes an arc-shaped shell fixed to both sides of the inner wall of the leaching tank, a circular groove is provided at the bottom of the arc-shaped shell, an inclined surface is provided at the end of the arc-shaped shell, and a No. 1 filter screen is fixed to the arc-shaped shell at one end of the inclined surface; the guide assembly includes a guide plate fixed to the end of the collecting assembly, a tapered mouth is provided at the end of the guide plate, and arc grooves are provided on both sides of the inner wall of the guide plate; the leak-proof assembly includes a shaft rotating at the corresponding arc groove on the inner wall of the guide plate, three arc plates fixed to the outer wall of each shaft rod, and a gear fixed to the top of the shaft rod, and the two gears are meshed.

[0007] As a preferred embodiment of the lithium extraction device for the production of lithium iron phosphate batteries according to the present invention, the centralized assembly includes a holding tank at the bottom of the holding assembly, inlet pipes fixed to both sides of the holding tank, the inlet pipes are connected to the collection assembly, a discharge valve fixed to the bottom end of the outer wall of the holding tank, a cover plate movably connected to the bottom end of the holding tank, a support rod fixed to the inner wall of the bottom end of the cover plate, the length of the support rod being higher than the discharge valve, and a No. 2 filter screen fixed to the top of the support rod.

[0008] As a preferred embodiment of the lithium extraction device for lithium iron phosphate battery production of the present invention, the stirring assembly includes a motor fixed to the top of the containing assembly, a center rod fixed to the driving end of the motor corresponding to the inside of the containing assembly, and a stirring blade fixed to the outer wall of the center rod.

[0009] As a preferred embodiment of the lithium extraction device for lithium iron phosphate battery production of the present invention, the transmission assembly includes a connecting block fixed to the bottom of the stirring assembly, a hollow tube movably connected to the outer wall of the connecting block, an inclined groove provided on the inner wall of the hollow tube, and a sliding rod sliding inside the inclined groove, wherein the sliding rod is connected to the connecting block.

[0010] As a preferred embodiment of the lithium extraction device for lithium iron phosphate battery production of the present invention, the lifting assembly includes a central block fixed to the bottom of the hollow tube, three fixed plates fixed to the outer wall of the central block, a scraper sliding on the bottom end of the fixed plate, and a spring fixed between the scraper and the fixed plate.

[0011] The beneficial effects of the lithium extraction device for lithium iron phosphate battery production of the present invention are as follows: the present invention can collect the iron-phosphorus slag in the liquid after leaching is completed through the collection component, the guide component, and the leak-proof component, thereby preventing the iron-phosphorus slag from clogging the interior of the containing component. The coordination of the stirring component, the transmission component, and the lifting component can improve the efficiency of collecting the iron-phosphorus slag and clean the interior of the containing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is an overall schematic diagram of the lithium extraction device used in the production of lithium iron phosphate batteries.

[0014] Figure 2 Schematic diagram of the internal structure of the lithium extraction device used in the production of lithium iron phosphate batteries.

[0015] Figure 3 Schematic diagram of the component structure of the lithium extraction device used in the production of lithium iron phosphate batteries.

[0016] Figure 4 Schematic diagram of the collection component structure in the lithium extraction device used in the production of lithium iron phosphate batteries.

[0017] Figure 5 This is a schematic diagram of the partial structure of the lithium extraction device used in the production of lithium iron phosphate batteries.

[0018] Figure 6 Schematic diagram of the guide component structure in the lithium extraction device used in the production of lithium iron phosphate batteries.

[0019] Figure 7 Schematic diagram of the leak-proof component structure in the lithium extraction device used in the production of lithium iron phosphate batteries.

[0020] Figure 8 Schematic diagram of the concentrated component structure of the lithium extraction device used in the production of lithium iron phosphate batteries.

[0021] Figure 9 For the present invention Figure 8 Schematic diagram of the structure at point A in .

[0022] Figure 10 Schematic diagram of the transmission component structure in the lithium extraction device used in the production of lithium iron phosphate batteries.

[0023] Figure 11 Schematic diagram of the lifting component structure in the lithium extraction device used in the production of lithium iron phosphate batteries.

[0024] In the figure: 100, containing assembly; 200, collecting assembly; 300, guiding assembly; 400, leak-proof assembly; 500, concentrating assembly; 600, stirring assembly; 700, transmission assembly; 800, lifting assembly;

[0025] 101. Leaching tank; 102. Mounting slot; 103. Filter plate; 104. Reserved slot;

[0026] 201, curved shell; 202, circular groove; 203, inclined surface; 204, filter screen No. 1;

[0027] 301, guide plate; 302, tapered mouth; 303, arc groove;

[0028] 401, shaft; 402, curved plate; 403, gear;

[0029] 501, holding tank; 502, inlet pipe; 503, discharge valve; 504, cover plate; 505, support rod; 506, filter screen No. 2;

[0030] 601, motor; 602, center rod; 603, stirring blade;

[0031] 701, connecting block; 702, hollow tube; 703, chute; 704, slide rod;

[0032] 801, center block; 802, fixed plate; 803, scraper; 804, spring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Example, see Figures 1 to 11 , is an embodiment of the present invention, which provides a lithium extraction device for lithium iron phosphate battery production, which can achieve the effect of preventing iron-phosphorus slag from clogging the internal pipes and filters of the leaching barrel when the positive electrode of the lithium iron phosphate battery is leached. The device includes a containing assembly 100, which includes a collecting assembly 200 fixed to both sides of the inside of the containing assembly 100, a guide assembly 300 fixed to the end of the collecting assembly 200, a leak-proof assembly 400 rotating on the end of the guide assembly 300, a concentrating assembly 500 fixed to the bottom of the collecting assembly 200, a stirring assembly 600 fixed to the center of the containing assembly 100, a transmission assembly 700 fixed to the bottom of the stirring assembly 600, and a lifting assembly 800 fixed to the bottom of the transmission assembly 700. When the containing assembly 100 performs the leaching method, The interior of the containing 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 in the containing component 100, and thus increase the leaching efficiency. When the stirring component 600 rotates counterclockwise, the liquid and iron-phosphorus slag are guided from the guide component 300 to the collecting component 200, so the iron-phosphorus slag generated by the positive electrode of the lithium iron phosphate battery during leaching will enter the collecting component 200, and then can be introduced into the concentrating 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 that has settled to the bottom of the inner wall of the containing component 100, and then be collected by the collecting component 200, which can avoid the problem of the iron-phosphorus slag settling to the bottom and clogging the interior of the containing component 100.

[0035] Specifically, such as Figure 3 In the figure, the containing assembly 100 includes a leaching tank 101, a mounting groove 102 is provided at the bottom of the leaching tank 101, a filter plate 103 is fixed to the inner wall of the leaching tank 101, and reserved grooves 104 are provided on both sides of the filter plate 103. When in use, the positive electrode of the lithium iron phosphate battery and the leaching agent can be added to the leaching tank 101 to extract the lithium element by leaching.

[0036] Further, such as Figure 4In the embodiment, the collecting assembly 200 includes an arc-shaped shell 201 fixed on 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, an inclined surface 203 is provided at the end of the arc-shaped shell 201, and a No. 1 filter 204 is fixed to the arc-shaped shell 201 at one end of the inclined surface 203. Since the No. 1 filter 204 is located at the inclined surface 203, the No. 1 filter 204 is also in an inclined state. When in use, the inclined surface 203 and the No. 1 filter 204 at the end of the arc-shaped shell 201 can rotate in the opposite direction when the stirring assembly 600 is stirred, which will cause the liquid, iron-phosphorus slag and the positive electrode of the lithium iron phosphate battery to flow out from the inclined surface of the arc-shaped shell 201. 203, because the inclined No. 1 filter screen 204 can prevent the iron-phosphorus slag and the positive electrode of the lithium iron phosphate battery from entering the arc shell 201, and avoid the iron-phosphorus slag and the positive electrode of the lithium iron phosphate battery from entering the arc shell 201 during leaching. After the leaching method is completed, by starting the stirring component 600 counterclockwise, the liquid and the iron-phosphorus slag can be driven to enter from the opening of the arc shell 201, so that the liquid can continue to flow through the No. 1 filter screen 204, and the iron-phosphorus slag will be collected in the arc shell 201. Due to the weight of the inclined No. 1 filter screen 204 and the iron-phosphorus slag itself, the iron-phosphorus slag can be guided to the centralized component 500 through the circular groove 202.

[0037] Further, such as Figure 6 In the figure, the guide assembly 300 includes a guide plate 301 fixed to the end of the collection assembly 200. The guide plate 301 is fixed at the opening of the arc shell 201 in the collection assembly 200. A conical mouth 302 is provided at the end of the guide plate 301, and arc grooves 303 are provided on both sides of the inner wall of the guide plate 301. When in use, the conical mouth 302 of the guide plate 301 can increase the probability of iron-phosphorus slag entering the liquid, thereby improving the efficiency of cleaning the iron-phosphorus slag.

[0038] Further, such as Figure 5 、 7 In the figure, the leakage prevention component 400 includes a shaft 401 rotating on the inner wall of the guide plate 301 corresponding to the arc groove 303, three arc plates 402 fixed to the outer wall of each shaft 401, the arc plates 402 on the two shafts 401 are cross-arranged, and a gear 403 fixed to the top of the shaft 401. The two gears 403 are meshed with each other. When in use, the flow of liquid will act on the arc plate 402, and the arc plate 402 will drive the shaft 401 and the gear 403 to rotate. Because the two gears 403 are in a meshing state, the arc plates 402 on the two shafts 401 will be in a cross state at the same time. The gap in the intersection can drive the iron-phosphorus slag in the liquid into the arc shell 201 and prevent the iron-phosphorus slag from escaping from the arc shell 201.

[0039] Further, such as Figure 8 、 9In the embodiment, the centralized component 500 includes a holding tank 501 at the bottom of the holding component 100, the holding tank 501 is fixed at the mounting groove 102 in the holding component 100, the inlet pipe 502 fixed on both sides of the holding tank 501, the middle of the inlet pipe 502 is connected to the reserved groove 104, the inlet pipe 502 is connected to the collection component 200, 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, the discharge valve 503 fixed to the bottom end of the outer wall of the holding tank 501, the cover plate 504 movably connected to the bottom end of the holding tank 501, the cover plate 504 and the bottom of the holding tank 501 are threadedly connected, and the support rod 505 is fixed to the inner wall of the bottom end of the cover plate 504, and the length of the support rod 505 is 200mm. The second filter screen 506 is higher than the discharge valve 503 and is fixed on the top of the support rod 505. When in use, the iron-phosphorus slag is guided into the holding tank 501 through the circular groove 202 and the inlet pipe 502 for concentration, and the iron-phosphorus slag at the bottom end of the holding tank 501 will be supported by the second filter screen 506. Because the second filter screen 506 is higher than the discharge valve 503, when cleaning the holding tank 501, the liquid in the holding tank 501 can be discharged through the discharge valve 503, and then the iron-phosphorus slag in the holding tank 501 can be discharged from the bottom of the holding tank 501 by removing the cover plate 504, the support rod 505 and the second filter screen 506, so that the iron-phosphorus slag can be cleaned in a centralized manner, and the liquid and the iron-phosphorus slag can be separated and discharged, which is convenient for subsequent operations.

[0040] Further, such as Figure 2 In the figure, the stirring component 600 includes a motor 601 fixed to the top of the containing component 100. The motor 601 is fixed to the top of the leaching tank 101 in the containing component 100, and its driving end passes through the inside of the leaching tank 101. The driving end of the motor 601 is fixed to the center rod 602 corresponding to the inside of the containing component 100, and the stirring blade 603 is fixed to the outer wall of the center rod 602. When in use, the motor 601 will drive the center rod 602 and the stirring blade 603 to rotate, and the downward-tilted blades of the stirring blade 603 will mix the liquid and the downward rotation. During leaching, the leaching agent and the positive electrode of the lithium iron phosphate battery are quickly leached and used. When the leaching is completed, the motor 601 is started to drive the center rod 602 and the stirring blade 603 to rotate counterclockwise, so that the stirring blade 603 can guide the liquid upward to rotate, which can increase the probability of the iron-phosphorus slag in the liquid entering the collecting component 200 and improve the efficiency of cleaning the iron-phosphorus slag in the liquid.

[0041] Further, such as Figure 10 、 11 In the embodiment, 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 center rod 602 in the stirring assembly 600. A hollow tube 702 is movably connected to the outer wall of the connecting block 701. The inner wall of the hollow tube 702 is provided with an inclined groove 703. A sliding rod 704 slides inside the inclined groove 703. The sliding rod 704 is connected to the connecting block 701.

[0042] The lifting assembly 800 includes a central block 801 fixed to the bottom of the hollow tube 702, three fixed plates 802 fixed to the outer wall of the central block 801, and a scraper 803 sliding on the bottom end of the fixed plate 802. The scraper 803 is initially close to the filter plate 103. The spring 804 fixed between the scraper 803 and the fixed plate 802 can drive the connecting block 701 and the slide bar 704 to rotate when the central rod 602 rotates clockwise. As a result, the slide bar 704 will rotate toward the bottom of the inclined groove 703, thereby driving the hollow tube 702 to move upward. In this process, the slide bar 704 drives the hollow tube 702 to move upward with inertia, and the hollow tube 702 is The core tube 702 will drive the central block 801, the fixed plate 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, the slide bar 704 is at the top of the chute 703 due to the influence of inertia, so the scraper 803 is closer to the filter plate 103 at this time. When the central block 801 rotates, it will drive the fixed plate 802 and the scraper 803 to scrape the iron-phosphorus slag on the filter plate 103, making it easier for the iron-phosphorus slag to enter the collecting assembly 200, and clean the iron-phosphorus slag blocked on the filter plate 103 to avoid blockage of the filter plate 103.

[0043] When in use, lithium elements are extracted by leaching by adding the positive electrode of lithium iron phosphate battery and leaching agent into the leaching tank 101. During this process, the motor 601 can be started to drive the central rod 602 and the stirring blade 603 to rotate, and the downward-slanting blade of the stirring blade 603 will mix the liquid and the downward rotation, which can improve the leaching efficiency. After the leaching is completed, the motor 601 drives the central rod 602 and the stirring blade 603 to rotate counterclockwise, so that the stirring blade 603 can guide the liquid to rotate upward, and when the central rod 602 rotates counterclockwise, the central rod 602 will drive the transmission component 700 and the lifting component 800 to rotate. During this process, the sliding rod 704 is at the top of the chute 703 due to the influence of inertia, so the scraper 803 at this time The distance from the filter plate 103 is relatively close, so when the center block 801 rotates, it will drive the fixed plate 802 and the scraper 803 to scrape the iron-phosphorus slag on the filter plate 103, so that the iron-phosphorus slag can enter the collecting assembly 200 more easily, and the scraper 803 can clean the iron-phosphorus slag stuck on the filter plate 103. If the iron-phosphorus slag is tightly stuck in the hole of the filter plate 103, the filter plate 103 will move toward the fixed plate 802 and squeeze the spring 804 to avoid damage in the process. After passing the blockage, the scraper 803 can be driven to reset by the spring 804. The above-mentioned stirring blade 603 and the scraper 803 increase the activity of the iron-phosphorus slag in the liquid in the water when rotating, so that it is easier to enter the arc shell 201 through the tapered mouth 302 of the guide plate 301. In this process , the flow of liquid will act on the curved plate 402, and the curved plate 402 will drive the shaft 401 and the gear 403 to rotate. Because the two gears 403 are in a meshing state, the curved plates 402 on the two shafts 401 will be in a crossed state. The gap in the intersection can drive the iron-phosphorus slag in the liquid into the curved shell 201 and prevent the iron-phosphorus slag from escaping from the curved shell 201. When the iron-phosphorus slag enters from the opening of the curved shell 201, the liquid can continue to flow through the No. 1 filter screen 204, and the iron-phosphorus slag will be collected in the curved shell 201. Due to the weight of the inclined No. 1 filter screen 204 and the iron-phosphorus slag itself, the iron-phosphorus slag can be guided into the holding tank 501 through the circular groove 202 and the inlet pipe 502 for concentration. The bottom of the holding tank 501 is The iron-phosphorus slag will be supported by the No. 2 filter screen 506. Since the No. 2 filter screen 506 is higher than the discharge valve 503, when cleaning the holding tank 501, the liquid in the holding tank 501 can be discharged through the discharge valve 503, and then the iron-phosphorus slag in the holding tank 501 can be discharged from the bottom of the holding tank 501 by removing the cover plate 504, the support rod 505 and the No. 2 filter screen 506, so that the iron-phosphorus slag can be cleaned in a centralized manner, and the liquid and the iron-phosphorus slag can be separated and discharged for easy subsequent operation. In addition, during this leaching process, since the stirring component 600 can drive the water flow in the holding component 100 to rotate clockwise and counterclockwise, the iron-phosphorus slag blocked on the No. 1 filter screen 204 is detached due to the slight deformation of the No. 1 filter screen 204 caused by repeated driving of the water flow, so it has a cleaning function.

[0044] In summary, through the collection component 200, the guide component 300, and the leak-proof component 400, the iron-phosphorus slag in the liquid can be collected after the leaching is completed to prevent the iron-phosphorus slag from clogging the inside of the containing component 100. Through the cooperation of the stirring component 600, the transmission component 700, and the lifting component 800, the iron-phosphorus slag collection efficiency can be improved, and the inside of the containing component 100 can be cleaned.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A lithium extraction device for lithium iron phosphate battery production, characterized by: include, A containing assembly (100) comprising a collecting assembly (200) fixed to both sides of the inside of the containing assembly (100), a guiding assembly (300) fixed to the end of the collecting assembly (200), a leak-proof assembly (400) rotating on the end of the guiding assembly (300), a concentrating assembly (500) fixed to the bottom of the collecting assembly (200), a stirring assembly (600) fixed to the center of the containing assembly (100), a transmission assembly (700) fixed to the bottom of the stirring assembly (600), and a lifting assembly (800) fixed to the bottom of the transmission assembly (700); The containing assembly (100) includes a leaching tank (101), a mounting groove (102) is provided at the bottom of the leaching tank (101), a filter plate (103) is fixed to the inner wall of the leaching tank (101), and reserved grooves (104) are provided on both sides of the filter plate (103); The collecting assembly (200) comprises an arc-shaped shell (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), an inclined surface (203) is provided at the end of the arc-shaped shell (201), and a filter screen (204) is fixed to the arc-shaped shell (201) at one end of the inclined surface (203); The guide assembly (300) comprises a guide plate (301) fixed to the end of the collection assembly (200), the end of the guide plate (301) is provided with a tapered opening (302), and arc-shaped grooves (303) are provided on both sides of the inner wall of the guide plate (301); The anti-leakage assembly (400) comprises a shaft (401) rotating on the inner wall of the guide plate (301) at the corresponding arc groove (303), three arc plates (402) fixed to the outer wall of each shaft (401), and a gear (403) fixed to the top of the shaft (401), wherein the two gears (403) are meshed with each other.

2. The lithium extraction device for lithium iron phosphate battery production according to claim 1, characterized in that: The centralized assembly (500) includes a holding tank (501) at the bottom of the holding assembly (100), an inlet pipe (502) fixed to both sides of the holding tank (501), the inlet pipe (502) being connected to the collecting assembly (200), a discharge valve (503) fixed to the bottom end of the outer wall of the holding tank (501), a cover plate (504) movably connected to the bottom end of the holding 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) being longer than the discharge valve (503), and a No. 2 filter (506) fixed to the top of the support rod (505).

3. The lithium extraction device for lithium iron phosphate battery production according to claim 1, characterized in that: The stirring assembly (600) includes a motor (601) fixed to the top of the containing assembly (100), a center rod (602) fixed to the driving end of the motor (601) corresponding to the interior of the containing assembly (100), and a stirring blade (603) fixed to the outer wall of the center rod (602).

4. The lithium extraction device for producing lithium iron phosphate batteries according to claim 1, characterized in that: The transmission assembly (700) includes a connecting block (701) fixed to the bottom of the stirring assembly (600), a hollow tube (702) movably connected to the outer wall of the connecting block (701), an inclined groove (703) provided on the inner wall of the hollow tube (702), and a sliding rod (704) sliding inside the inclined groove (703), wherein the sliding rod (704) and the connecting block (701) are connected.

5. The lithium extraction device for producing lithium iron phosphate batteries according to claim 4, characterized in that: The lifting assembly (800) includes a central block (801) fixed to the bottom of the hollow tube (702), three fixed plates (802) fixed to the outer wall of the central block (801), a scraper (803) sliding on the bottom end of the fixed plate (802), and a spring (804) fixed between the scraper (803) and the fixed plate (802).

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