Stirring mechanism for the extraction of lithium from the waste liquid of a lithium iron phosphate battery

Abstract

A stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, comprising a base (1), a clamping jaw (3), and a stirring mechanism; wherein the clamping jaw (3) is movably connected to both ends of the base (1), the base (1) is provided at a lower section with a support frame (4), and the stirring mechanism is rotatably arranged in a center of the support frame (4) and extends to a lower section of the support frame (4); wherein the stirring mechanism comprises a first motor (5), a rotating element (6), and a stirring element (7); the first motor (5) is fixed in a center of the base (1); the rotating element (6) is inserted in the center of the support frame (4), and the rotating element (6) comprises a second motor (61), a connecting end (62), and a rotating shaft (63);the connecting end (62) has an “L”-shaped structure, an enclosed angle between two end sections of the connecting end (62) is obtuse, and one end of the connecting end (62) is connected to an output end of the first motor (5); the second motor (61) is attached to an upper section of the other end of the connecting end (62); the rotating shaft (63) comprises an inner shaft (631) and an outer shaft (632); the outer shaft (632) is connected to a lower section of the connecting end (62) below the second motor (61), and the inner shaft (631) is rotatably arranged in an inner cavity of the outer shaft (632) and connected to an output end of the second motor (61); wherein the stirring element (7) comprises a jaw-shaped connecting base (71), a separating frame (72), a material guide wheel (73), and a collecting frame (74); the jaw-shaped connecting base (71) is connected to an outer lower end of the outer shaft (632);the separating frame (72) is connected to a lower end of the jaw-shaped connecting base (71); the collecting frame (74) is detachably connected to a lower section of the separating frame (72); and the material guide wheel (73) is attached to a lower end of an inner cavity of the collecting frame (74) and is connected to a lower end of the inner shaft (631).

Description

FIELD OF TECHNOLOGY

[0001] The present invention relates to the technical field of recycling waste batteries and, more particularly, to a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery. BACKGROUND

[0002] The lithium iron phosphate battery is a lithium-ion battery with lithium iron phosphate as the cathode material and carbon as the anode material. Due to its advantages such as high operating voltage, high energy density, long cycle life, good safety, low self-discharge, and no memory effect, the lithium iron phosphate battery is widely used in the new energy vehicle industry. With the rise of electrification in the automotive industry, people have begun to pay attention to the recycling of lithium iron phosphate batteries for vehicles in the future.

[0003] Lithium iron phosphate battery recycling is mainly divided into two stages: in the first stage, a lithium iron phosphate battery is crushed into lithium iron phosphate powder; in the second stage, the lithium iron phosphate powder is recycled into a lithium salt product such as lithium carbonate through a physical or chemical process. A lithium element in the waste liquid of the existing lithium iron phosphate battery is mostly recycled through a chemical process—wet extraction. This means that the lithium iron phosphate battery waste liquid is mixed with other chemical solutions for reaction; other metal elements (such as iron, aluminum, and manganese) in the lithium iron phosphate battery waste liquid are agglomerated and precipitated by continuously stirring the mixed solution; and finally, a precipitate is filtered and separated to obtain a lithium carbonate solution.However, most existing devices require manual stirring of the mixed solution of lithium iron phosphate battery waste liquid and other chemical solutions, then agglomerating and precipitating other metal elements and filtering layer by layer to obtain the lithium carbonate solution. The entire process is complicated and the extraction takes a long time, thus failing to meet the demand for convenient extraction of lithium from lithium iron phosphate battery waste liquid.

[0004] Document CN 2 13 416 506 U discloses a lithium battery waste liquid treatment system. This lithium battery waste liquid treatment system includes a waste liquid pan filling port, one end of which is fixedly connected to the waste liquid agitation tank of the waste liquid pan filling port, one side swivel joint of the waste liquid agitation tank has the box fixed knob, one end of which is fixedly connected to the agitation tank skirt has the box fixed knob, the upper swivel joint of the agitation tank skirt has the drug lid, the one end swivel joint that decomposes the drug lid has the drug decomposition tube, the motor protection casing is placed on one side of the drug decomposition tube, and the inner swivel joint of the bottom of the motor protection casing has the motor combination power supply.

[0005] Document CN 2 14 115 126 U discloses a device for filtering lithium-ion battery waste liquid, which comprises handling the casing, advancing the tube to the upper part of the casing, which is firmly connected to the waste liquid, firmly connecting the upper part of the casing to the motor, the output end of the motor is firmly connected to the pivot, the lower part of the pivot passes through and handles the casing and extends downwards, the pivot is located on the side wall of one end of the casing and is connected to a tapping mechanism, it advances the medical kit to handle the casing at the top, firmly connected to, it advances the pencil to advance the side wall of the medical kit, firmly connected to, advances the pencil and keeps itself away from the medical kit, one end of the side wall and the upper end of the casing are firmly connected,The inner wall of the housing is firmly connected to the filter and is equipped with a spacer mechanism above the filter. PRESENTATION OF THE INVENTION

[0006] The object of the present application is to provide a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery in order to solve the above-mentioned problems.

[0007] To achieve the above-mentioned goal, the technical solutions of the present invention are as follows: a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery includes a base, a clamp, and a stirring mechanism; the clamp is movably connected to both ends of the base; the base is provided with a support frame at a lower portion, and the stirring mechanism is rotatably disposed in a center of the support frame and extends to a lower portion of the support frame; the stirring mechanism includes a first motor, a rotating member, and a stirring element; the first motor is fixed in a center of the base; the rotating member is inserted in the center of the support frame, and the rotating member includes a second motor, a connecting end, and a rotating shaft;The connecting end has an "L"-shaped structure, an included angle between two end portions of the connecting end is blunt, and one end of the connecting end is connected to an output end of the first motor; the second motor is fixed to an upper portion of the other end of the connecting end; the rotating shaft includes an inner shaft and an outer shaft; the outer shaft is connected to a lower portion of the connecting end below the second motor, and the inner shaft is rotatably disposed in an inner cavity of the outer shaft and connected to an output end of the second motor; the stirring element includes a jaw-shaped connecting base, a separating frame, a material guide wheel, and a collecting frame; the claw-shaped connecting base is connected to an outer lower end of the outer shaft; the separating frame is connected to a lower end of the claw-shaped connecting base;the collecting frame is detachably connected to a lower portion of the separating frame; and the material guide wheel is attached to a lower end of an inner cavity of the collecting frame and connected to a lower end of the inner shaft.

[0008] Furthermore, the number of clamping jaws is not less than three, and the clamping jaw includes a connecting plate and a fixing plate; the connecting plate is movably connected to the fixing plate, and one end of the connecting plate remote from the fixing plate is suspended from the base; and a connection between the connecting plate and the fixing plate and a connection between the connecting plate and the base are both provided with a locking knob for locking the angle.

[0009] In addition, the mounting plate is provided with an anti-slip protection on one side near the frame.

[0010] In addition, a middle section of the rotary shaft is provided with a support end; and the center of the support frame is provided with at least three limiting plates for limiting the vibration amplitudes of a fixed end, the rotary shaft and the support end.

[0011] Further, the separating frame is provided with a downwardly lowered funnel-shaped extension portion at an upper end, and a gap is formed between the extension portion and the outer shaft; a material guide plate is provided on an outer side of the outer shaft in an inner cavity of the separating frame, and a spiral recess is provided on an outer side wall of the outer shaft at the extension portion above the material guide plate.

[0012] Furthermore, the collecting frame includes an inner cylinder, a filter plate, and an outer frame; the inner cylinder is located above an inner cavity of the outer frame and is arranged coaxially with the outer frame; the filter plate is arranged in a middle portion of the inner cavity of the outer frame and connected to a lower end of the inner cylinder to divide the outer frame into an upper opening cavity and a lower open cavity; and the upper opening cavity of the outer frame extends below the material guide plate in the separating frame.

[0013] Furthermore, the material guide wheel is arranged in the lower opening cavity of the outer frame, and the material guide wheel includes a connecting frame, blades, and a baffle plate arranged one behind the other; the connecting frame is annular with a channel in the center; the hook-shaped blades are arranged circumferentially between the connecting frame and the baffle plate, and a thickness of an end of the blade near a central point of the connecting frame and the baffle plate is smaller than that of an end of the blade near an outer periphery of the connecting frame and the baffle plate; and a lower end of the inner shaft passes through the channel of the connecting frame and is connected to the baffle plate.

[0014] Compared to the prior art, the present invention has the following advantageous effects: (1) According to the present invention, using the obliquely arranged rotating element, the rotating element and the stirring element form a certain angle with the central axis of the container while rotating with the motor to expand the rotating and stirring range of the stirring element and accelerate the fusion between the mixed solutions, so that other metal elements in the waste liquid of the lithium iron phosphate battery are quickly precipitated and separated; (2) According to the present invention, the jaw-shaped connecting base, the separating frame, the material guide wheel, and the collecting frame are adopted to form the stirring element. The connecting base, the separating frame, and the collecting frame rotate together with the outer shaft of the rotating shaft, and the material guide wheel rotates together with the intermediate shaft of the rotating shaft, so that the material guide wheel with a faster rotating speed can form a suction force at the lower end of the inner cavity of the collecting frame, so that the mixed solution quickly enters the inner cavity of the separating frame through the gap between the jaw-shaped connecting base and the separating frame, so that other metal elements precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery can be deposited in the inner cavity of the collecting frame under the action of the flowing solution.thereby achieving the goal of separating other metal elements in the waste liquid of the lithium iron phosphate battery and reducing complicated operations and precipitation filtering operations caused by manual stirring;, (3) According to the present invention, the specially shaped extension portion and the spiral recess arranged on the outer shaft can accelerate a flow rate of the mixed solution in the gap between the extension portion and the outer shaft and make the mixed solution quickly enter the inner cavity of the separation frame to separate and filter the precipitated metal; (4) According to the present invention, by disposing the material guide plate between the extension portion and the upper opening cavity of the outer frame, a flow path of the mixed solution in the separation frame can be extended by the material guide plate, thereby ensuring that the mixed solution has a certain time for other metal elements to precipitate and agglomerate; and (5) According to the present invention, by arranging the adjustable clamp jaw arranged at the lower part of the base, an included angle between the connecting plate of the clamp jaw and the base and an included angle between the connecting plate and the fixing plate can be adaptively adjusted according to a size of the bottle opening of the lithium extraction container, and after adjusting the angle, it is locked by the locking knob, so that the distance between the clamp jaws can be adaptively adjusted according to the size of the bottle opening of the lithium extraction container, thereby ensuring that the adjusted clamp jaws can realize stable clamping with the bottle opening of the lithium extraction container, thereby ensuring the stable use of the rotating member and the stirring member. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic representation of a side view of the present invention; Fig. 2 is a schematic representation of a front view of the structure of the present invention. Fig. 3 is a schematic structural diagram of a cross section of a stirring element of the present invention; Fig. 4 is a schematic structural diagram of a plan view of the stirring element of the present invention; and Fig. 5 is a schematic structural diagram of a plan view of a material guide wheel of the present invention.

[0015] In the drawings, the elements represented by the reference numbers are listed as follows: 1 refers to the base, 2 refers to the locking knob, 3 refers to the clamping jaw, 31 refers to the connecting plate, 32 refers to the fixing plate, 4 refers to the supporting frame, 41 refers to the limiting plate, 5 refers to the first motor, 6 refers to the rotating member, 61 refers to the second motor, 62 refers to the connecting end, 63 refers to the rotating shaft, 631 refers to the inner shaft, 632 refers to the outer shaft, 633 refers to the material guiding plate, 64 refers to the supporting end, 7 refers to the stirring member, 71 refers to the jaw-shaped connecting base, 72 refers to the separating frame, 721 refers to the extending portion, 73 refers to the material guiding wheel, 731 refers to the connecting frame, 732 refers to the blade, 733 refers to the deflection plate,74 refers to the collecting frame, 741 refers to the inner cylinder, 742 refers to the filter plate and 743 refers to the outer frame. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are illustrated in the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to illustrate the present invention, but are not to be construed as limiting the present invention. Embodiment 1:

[0017] As in the Fig. As shown in Figures 1 to 5, a stirring mechanism for extracting lithium from the waste liquid of a lithium iron phosphate battery comprises a base 1, a clamp 3, and a stirring mechanism. The clamp 3 is movably connected to both ends of the base 1; the base is provided with a support frame 4 at a lower portion, and the stirring mechanism is rotatably disposed in a center of the support frame 4 and extends to a lower portion of the support frame 4; the stirring mechanism includes a first motor 5, a rotating member 6, and a stirring member 7. The first motor 5 is fixed to the center of the base 1. The rotating member 6 is inserted into the center of the support frame 4, and the rotating member 6 includes a second motor 61, a connecting end 62, and a rotating shaft 63.The connecting end 62 has an "L"-shaped structure, an included angle between two end parts of the connecting end 62 is blunt, and one end of the connecting end 62 is connected to an output end of the first motor 5. The second motor 61 is fixed to an upper portion of the other end of the connecting end 62. The rotating shaft 63 includes an inner shaft 631 and an outer shaft 632. The outer shaft 632 is connected to a lower portion of the connecting end 62 below the second motor 61, and the inner shaft 631 is rotatably arranged in an inner cavity of the outer shaft 632 and connected to an output end of the second motor 61. The stirring element 7 consists of a claw-shaped connecting base 71, a separating frame 72, a material guide wheel 73, and a collecting frame 74. The jaw-shaped connecting base 71 is connected to an outer lower end of the outer shaft 632.The separating frame 72 is connected to a lower end of the jaw-shaped connecting base 71. The collecting frame 74 is detachably connected to a lower part of the separating frame 72. The material guide wheel 73 is fixed to a lower end of an inner cavity of the collecting frame 74 and connected to a lower end of the inner shaft 631. A battery (not shown in the figure) is arranged inside the base 1 to supply power to the first motor 5 and the second motor 61. The stirring mechanism can be attached to a bottle opening of a lithium extraction container via the clamping jaw 3 and enables the stirring element 7 to be immersed in the waste liquid of the lithium iron phosphate battery within the lithium extraction container.The rotation speed of the first motor 5 is lower than that of the second motor 61, so that after connecting the connecting base 71, the separation frame 72, and the collecting frame 74, the rotation speed is lower than the rotation speed of the material guide wheel 73, thereby ensuring that the solution can quickly enter the collecting frame 74 and the material guide wheel 73 after entering the separation frame 72. When rotating, the first motor 5 can rotate the connecting end 62 of the rotating member 6 and the outer shaft 632 of the rotating shaft 63, so that the connecting base 71, the separation frame 72, and the collecting frame 74 of the stirring member 7 rotate synchronously with the outer shaft 632 and further stir a mixed solution of the lithium iron phosphate battery waste liquid and a chemical preparation.Due to the obliquely arranged rotating element 6, the rotating element 6 and the stirring element 7 form a certain angle with the central axis of the container during rotation, expanding the rotating and stirring range of the stirring element 7 and accelerating the mixing between the mixed solutions, so that other metal elements in the waste liquid of the lithium iron phosphate battery are quickly precipitated and agglomerated. During the rotation of the stirring element 7, due to the special claw-shaped connecting base 71, a sufficient gap can be left between the claw-shaped connecting base 71 and the separator frame 72 after the two are connected.Therefore, when rotating, the second motor 61 can rotate the inner shaft 631 and the material guide wheel 73, and the material guide wheel 73 can form a suction force at the lower end of the inner cavity of the collecting frame 74 at a faster rotating speed, so that the mixed solution can quickly enter the inner cavity of the separating frame 72 through the gap between the claw-shaped connecting bottom 71 and the separating frame 72, so that other metal elements precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery can be separated in the inner cavity of the collecting frame 74 under the action of the flowing solution, thereby achieving the goal of separating other metal elements in the waste liquid of the lithium iron phosphate battery and reducing complicated operations and precipitation filtering operations caused by manual stirring.

[0018] As in Fig. 1 and Fig. 2, in this embodiment, the number of clamping jaws 3 is not less than three, and the clamping jaw 3 includes a connecting plate 31 and a fixing plate 32. The connecting plate 31 is movably connected to the fixing plate 32, and an end of the connecting plate 31 remote from the fixing plate 32 is suspended from the base 1. A connection between the connecting plate 31 and the fixing plate 32 and a connection between the connecting plate 31 and the base 1 are both provided with a locking knob 2 for locking the angle. In this embodiment, the fixing plate 32 is provided with a slip protector on one side near the support frame 4.The number of clamping jaws 3 is preferably four, and the four clamping jaws 3 are arranged at equal intervals around a circumference of the lower part of the base 1 to ensure that the base 1 can have good clamping stability when connected to the lithium extraction container via the clamping jaws 3. An included angle between the connecting plate 31 and the base 1 and an included angle between the connecting plate 31 and the fixing plate 32 can be adaptively adjusted according to a size of a bottle opening of the lithium extraction container, and after adjustment, the angle is locked by the locking knob 2, so that the distance between the clamping jaws 3 can be adaptively adjusted according to the size of the bottle opening of the lithium extraction container, and the adjusted clamping jaws 3 can realize stable clamping with the bottle opening of the lithium extraction container.The anti-slip member may be a rubber pad with anti-slip protrusions, which can not only ensure the anti-slip property of the fixing plate 32 and a side wall of the bottle opening of the lithium extraction container, but also avoid the wear of the fixing plate 32 when clamping the side wall of the lithium extraction container.

[0019] As in the Fig. 2 and Fig. 3, in this embodiment, a central portion of the rotary shaft 63 is provided with a support end 64; the center of the support frame 4 is provided with at least three limiting plates 41 for limiting the vibration amplitudes of a fixed end 61, the rotary shaft 63, and the support end 64, and the number of limiting plates 41 is preferably three. When the fixed end 61 is connected to the rotary shaft 63, an angle of the rotary shaft 63 can be changed by the specially shaped connecting end 62, so that the stirring element 7 connected to the lower part of the rotary shaft 63 can also be tilted, which can change the angles between the rotary element 6 and the stirring element 7 and a central axis of the lithium extraction container and ensures that a larger stirring range can be achieved when the motor 5 drives the rotary element 6 and the stirring element 7 to rotate.The arrangement of the support end 64 can realize the connection between the rotating member 6 and the limiting plate 41, which can better ensure the stability of the rotating member 6 during rotation and ensure that the rotating member 6 can drive the stirring member 7 to rotate and swing at a certain angle.

[0020] As in the Fig. 3 and Fig.4, the separation frame 72 in this embodiment is provided with a downwardly lowered funnel-shaped extension portion 721 at an upper end, and a gap is formed between the extension portion 721 and the outer shaft 632. A material guide plate 633 is provided on an outer side of the outer shaft 632 in an inner cavity of the separation frame 72, and a spiral recess (not marked in the figure) is provided on an outer side wall of the outer shaft 632 at the extension portion 721 above the material guide plate 633. In this embodiment, the collection frame 74 includes an inner cylinder 741, a filter plate 742, and an outer frame 743. The inner cylinder 741 is located above an inner cavity of the outer frame 743 and is arranged coaxially with the outer frame 743.The filter plate 742 is arranged in a central portion of the inner cavity of the outer frame 743 and connected to a lower end of the inner cylinder 741 to divide the outer frame 743 into an upper opening cavity and a lower open cavity. The upper opening cavity of the outer frame 743 extends below the material guide plate 633 in the separation frame 72. In this embodiment, the material guide wheel 73 is arranged in the lower opening cavity of the outer frame 743, and the material guide wheel 73 includes a connecting frame 731, blades 732, and a baffle plate 733 arranged one behind the other. The connecting frame 731 is annular and has a channel in the center.The hook-shaped blades 732 are arranged circumferentially between the connecting frame 731 and the baffle plate 733, and the thickness of one end of the blade 732 near a central point of the connecting frame 731 and the baffle plate 733 is smaller than that of one end of the blade 732 near an outer periphery of the connecting frame 731 and the baffle plate 733. A lower end of the inner shaft 631 passes through the channel of the connecting frame 731 and is connected to the baffle plate 733. A middle upper portion of the outer frame 743 may be spirally connected to the lower end of the partition frame 72, so that the partition frame 72 and the collecting frame 74 can be conveniently disassembled, which is advantageous for disassembly and cleaning of the agitator 7.The specially shaped extension portion 721 and the spiral recess disposed on the outer shaft 632 can accelerate the flow rate of the mixed solution in the gap between the extension portion 721 and the outer shaft 632 and promote the rapid entry of the mixed solution into the inner cavity of the separation frame 72. The inner cylinder 741 can be used as an assembly guide between the collecting frame 74 and the outer shaft 632 to ensure that the collecting frame 74 can be positioned by the outer shaft 632 when it is spirally mounted into the lower end of the separation frame 72.The filter plate 742, located in the center of the collecting frame 74, can effectively isolate other metal elements that have precipitated and agglomerated in the waste liquid of the lithium iron phosphate battery, ensuring that other metal elements that have precipitated and agglomerated can be separated from the lithium carbonate solution and collected in the collecting frame 74. The material guide plate 633, located between the extension portion 721 and the upper opening cavity of the outer frame 743, can extend a flow path of the mixed solution in the separation frame 72, thus ensuring that the mixed solution has a certain time for other metal elements to precipitate and agglomerate.When the specially shaped material guide wheel 73 rotates synchronously with the inner shaft 631, the solution flowing from the upper opening cavity of the collecting frame 74 to the lower opening cavity of the collecting frame 74 can flow through the channel of the connecting frame 731 and reach the vanes 732. Since the baffle plate 733 blocks the flow of the solution, the solution can be guided by the vanes 732 and spread circumferentially along an outer circumferential direction of the material guide wheel 73 and move downward under the block of the outer frame 743 at the lower end of the collecting frame 74, thereby further promoting the flow of the solution through secondary acceleration blocking and accelerating a mixing effect of the waste liquid of the lithium iron phosphate battery and the chemical preparation.

[0021] In summary, according to the stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery provided by the present invention, by using the obliquely arranged rotating member 6, the rotating member 6 and the stirring member 7 form a certain angle with a central axis of the container during rotation while rotating with the motor 5 to expand the rotating and stirring range of the stirring member 7 and accelerate the mixing between the mixed solutions, so that other metal elements in the waste liquid of the lithium iron phosphate battery are quickly precipitated and agglomerated.The specially shaped stirring element 7 can ensure that the solution reaches the extension portion 721 of the separation frame 72 and quickly enters the inner cavity of the separation frame 72 under the action of the suction force generated by the rotation of the material guide wheel 73, so that other metal elements precipitated from the waste liquid of the lithium iron phosphate battery can be precipitated in the inner cavity of the collection frame 74 under the action of the flowing solution, thereby achieving the goal of separating other metal elements from the waste liquid of the lithium iron phosphate battery.

[0022] In the descriptions of the specification, the descriptions with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., mean that specific features, structures, materials, or properties described with reference to the embodiments or examples are included in at least one embodiment or example of the present invention. In the description, the schematic representation of the above terms should not be understood to necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be appropriately combined in one or more embodiments or examples.Furthermore, the person skilled in the art can combine and combine various embodiments or examples described in the description.

Claims

[1] A stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, comprising a base (1), a clamping jaw (3), and a stirring mechanism; wherein the clamping jaw (3) is movably connected to both ends of the base (1), the base (1) is provided with a support frame (4) at a lower portion, and the stirring mechanism is rotatably arranged in a center of the support frame (4) and extends to a lower portion of the support frame (4); wherein the stirring mechanism comprises a first motor (5), a rotating member (6), and a stirring member (7); the first motor (5) is fixed in a center of the base (1); the rotating member (6) is inserted in the center of the support frame (4), and the rotating member (6) comprises a second motor (61), a connecting end (62), and a rotating shaft (63);the connecting end (62) has an "L"-shaped structure, an included angle between two end portions of the connecting end (62) is blunt, and one end of the connecting end (62) is connected to an output end of the first motor (5); the second motor (61) is fixed to an upper portion of the other end of the connecting end (62); the rotating shaft (63) comprises an inner shaft (631) and an outer shaft (632); the outer shaft (632) is connected to a lower portion of the connecting end (62) below the second motor (61), and the inner shaft (631) is rotatably arranged in an inner cavity of the outer shaft (632) and connected to an output end of the second motor (61); wherein the stirring element (7) comprises a jaw-shaped connecting base (71), a separating frame (72), a material guide wheel (73), and a collecting frame (74); the jaw-shaped connecting base (71) is connected to an outer lower end of the outer shaft (632);the separating frame (72) is connected to a lower end of the jaw-shaped connecting base (71); the collecting frame (74) is detachably connected to a lower portion of the separating frame (72); and the material guide wheel (73) is fixed to a lower end of an inner cavity of the collecting frame (74) and connected to a lower end of the inner shaft (631); [2] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to claim 1, wherein the number of the jaws (3) is not less than three, and the jaws (3) comprise a connecting plate (31) and a fixing plate (32); the connecting plate (31) is movably connected to the fixing plate (32), and an end of the connecting plate (31) remote from the fixing plate (32) is suspended from the base (1); and a connection between the connecting plate (31) and the fixing plate (32) and a connection between the connecting plate (31) and the base (1) are both provided with a locking knob (2) for locking the angle. [3] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to claim 2, wherein the fixing plate (32) is provided with a slip protection on a side near the support frame. [4] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to any one of claims 1 to 3, wherein a central portion of the rotary shaft (63) is provided with a supporting end (64); and the center of the supporting frame (4) is provided with at least three limiting plates (41) for limiting the vibration amplitudes of a fixed end, the rotary shaft (63) and the supporting end (64). [5] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to any one of claims 1 to 3, wherein the separation frame (72) is provided at an upper end with a downwardly lowered funnel-shaped extension portion (721), and a gap is formed between the extension portion (721) and the outer shaft (632); and a material guide plate (633) is provided on an outer side of the outer shaft (632) in an inner cavity of the separation frame (72), and a spiral recess is provided on an outer side wall of the outer shaft (632) at the extension portion (721) above the material guide plate (633). [6] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to claim 5, wherein the collecting frame (74) comprises an inner cylinder (741), a filter plate (742), and an outer frame (743); the inner cylinder (741) is located above an inner cavity of the outer frame (743) and is arranged coaxially with the outer frame (743); the filter plate (742) is arranged in a central portion of the inner cavity of the outer frame (743) and is connected to a lower end of the inner cylinder (741) to divide the outer frame (743) into an upper opening cavity and a lower opening cavity; and the upper opening cavity of the outer frame (743) extends below the material guide plate (633) in the partition frame (72). [7] The stirring mechanism for extracting lithium from the waste liquid of the lithium iron phosphate battery according to claim 6, wherein the material guide wheel (73) is arranged in the lower opening cavity of the outer frame (743), and the material guide wheel comprises a connecting frame (731), blades (732), and a baffle plate (733) arranged one behind the other; the connecting frame (731) is annular with a channel at a center; the hook-shaped blades (732) are arranged circumferentially between the connecting frame (731) and the baffle plate (733), and the thickness of an end of the blade (732) near a central point of the connecting frame (731) and the baffle plate (733) is smaller than that of an end of the blade (732) near an outer periphery of the connecting frame (731) and the baffle plate (733);and a lower end of the inner shaft (631) passes through the channel of the connecting frame (731) and is connected to the baffle plate (733);

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