Battery lithium extraction device and battery lithium extraction production equipment

Abstract

The disclosed embodiments provide a battery lithium extraction device and a battery lithium extraction production equipment. The battery lithium extraction device includes a collection bin, including a collection chamber, and an upper and lower feed port and a lower feed port connected to the collection chamber; at least one first grinding and screening assembly; each first grinding and screening assembly includes a first grinding unit and a first sweeping and screening unit arranged up and down; the first grinding unit includes a first grinding part and a second grinding part that rotate relative to each other; the first grinding part and the second grinding part are made of piezoelectric material; the first sweeping and screening unit includes a first sweeping and screening part and a second sweeping and screening part that rotate relative to each other; the first sweeping and screening part and the second sweeping and screening part are made of piezoelectric material; wherein, a piezoelectric effect is generated between the first grinding part and the second grinding part, and between the first sweeping and screening part and the second sweeping and screening part based on their respective relative rotation and extrusion, and generates charge movement that causes lithium ions to precipitate into water. The battery lithium extraction production equipment includes a gas distribution device, a heating device, a mixing device and a battery lithium extraction device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery lithium extraction, and in particular to a battery lithium extraction device and battery lithium extraction production equipment. Background Art

[0002] With the rapid development of electric vehicles, energy storage systems and other fields, the use of secondary batteries represented by lithium batteries has exploded. However, a large number of lithium batteries have reached the end of their life due to performance degradation in recent years, which means that we will face a large-scale retirement of lithium batteries. When it comes to battery recycling, recycling lithium from lithium batteries is an important part. Traditional recycling methods have problems such as low recovery rate, complex recycling process, high cost, and huge amounts of waste, waste and other environmental pollution risks. Therefore, there is an urgent need for an efficient, environmentally friendly and economically feasible lithium iron phosphate battery cathode recycling technology to meet the growing demand for battery recycling and the requirements of sustainable resource development. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a battery lithium extraction device and a battery lithium extraction production equipment to solve the problems in the related technology.

[0004] The first aspect of the present disclosure provides a battery lithium extraction device, comprising:

[0005] The collecting bin comprises a collecting chamber, and an inlet and an outlet arranged at the upper and lower parts thereof and connected to the collecting chamber; a material dropping channel is formed between the inlet and the outlet;

[0006] At least one first grinding and screening assembly is arranged along the material dropping channel; each of the first grinding and screening assemblies comprises a first grinding unit and a first sweeping and screening unit arranged up and down;

[0007] The first grinding unit comprises a first grinding part and a second grinding part which rotate relative to each other, and a first grinding channel for accommodating electrode slurry is formed between the first grinding part and the second grinding part; the first grinding part and the second grinding part are made of piezoelectric material;

[0008] The first sweeping screen unit comprises a first sweeping screen part and a second sweeping screen part which rotate relatively, and a first sweeping screen channel for receiving the falling electrode slurry is formed between the first sweeping screen part and the second sweeping screen part; the first sweeping screen part and the second sweeping screen part are made of piezoelectric material; the electrode slurry is a mixture of lithium battery electrode crushed material and water;

[0009] The relative rotation between the first grinding part and the second grinding part, and between the first scavenging part and the second scavenging part forms an extrusion to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

[0010] In an embodiment of the first aspect, the first grinding and screening assembly is implemented in multiple stages, and the multiple stages of the first grinding and screening assembly are arranged up and down along the material dropping channel; the aperture of the screening holes in the multiple stages of the first grinding and screening assembly decreases along the depth direction of the material dropping channel.

[0011] In an embodiment of the first aspect, the first grinding portion includes a first filter plate and an extrusion ring arranged on the top wall of the first filter plate, the extrusion ring includes a plurality of extrusion blocks distributed at intervals along the circumferential direction; the second grinding portion includes a plurality of outer grinding blocks distributed at intervals on the circumferential side wall of the collecting chamber.

[0012] In an embodiment of the first aspect, the first filter plate includes a plurality of first filter holes; a plurality of first blocking members corresponding to the number and positions of some of the first filter holes are provided in the first filter plate; each of the first blocking members includes a first telescopic member and a first blocking plate provided at the output end of the first telescopic member, and the first blocking plate blocks the corresponding first filter hole when the first telescopic member is extended.

[0013] In an embodiment of the first aspect, the first sweeping screen portion includes a first sweeping screen ring, and a plurality of first sweeping plates that are spaced apart and arranged on the outer wall of the first sweeping screen ring and extend radially outward; the second sweeping screen portion includes a second filter plate arranged below the first sweeping screen ring.

[0014] In an embodiment of the first aspect, a second grinding and screening assembly is further included, which is arranged below the first grinding and screening assembly along the material dropping channel; the second grinding and screening assembly includes a second grinding unit and a second sweeping screen unit arranged up and down; the second grinding unit includes a third grinding part and at least a fourth grinding part that rotate relative to each other, and a second grinding channel for accommodating electrode slurry is formed between the third grinding part and the at least one fourth grinding part; the third grinding part and the at least one fourth grinding part are made of piezoelectric material; the second sweeping screen unit includes a third sweeping screen part and a fourth sweeping screen part that rotate relative to each other, and a second sweeping screen channel for receiving the falling electrode slurry is formed between the third sweeping screen part and the fourth sweeping screen part; the third sweeping screen part and the fourth sweeping screen part are made of piezoelectric material; wherein, the third grinding part and the at least one fourth grinding part, and the third sweeping screen part and the fourth sweeping screen part are squeezed based on their respective relative rotations to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

[0015] In an embodiment of the first aspect, the third grinding section includes a third filter plate, and the top wall of the third filter plate is connected to a plurality of tumbling blocks which are distributed at intervals along the circumference of the collecting chamber and extend radially; the fourth grinding section includes a plurality of stirring columns which are distributed at intervals along the circumference of the collecting chamber and extend radially on the wall of the collecting chamber; the third sweeping section includes a second sweeping ring, and a plurality of second sweeping plates which are distributed at intervals on the outer wall of the second sweeping ring and extend radially outward; the fourth sweeping section includes a fourth filter plate arranged below the second sweeping ring.

[0016] The second aspect of the present disclosure provides a battery lithium extraction production equipment, comprising:

[0017] The battery lithium extraction device;

[0018] The heating device comprises a heating chamber and a heating element arranged in the heating chamber; the heating chamber comprises a feeding port and a feeding port;

[0019] The air distribution device comprises a dispersing fan and an air equalizing box; the air outlet of the air equalizing box is arranged on the heating bin so as to align with the material feeding port, and the dispersing fan is arranged on the wall surface of the air equalizing box where the air outlet is located;

[0020] The mixing device comprises a mixing tank and a stirring element; the mixing tank comprises a mixing chamber and a feed inlet, a liquid inlet and a liquid inlet connected to the mixing chamber; the feed inlet is connected to the feed inlet; the liquid inlet is connected to the feed inlet; the stirring element is arranged in the mixing chamber.

[0021] In an embodiment of the second aspect, a buffer box is provided in the mixing chamber; the liquid inlet is connected to the buffer box, the liquid outlet at the bottom of the buffer box is aligned with the area in the mixing chamber that surrounds the infusion port, and the flow direction of the liquid outlet is perpendicular to the flow direction of the infusion port.

[0022] In an embodiment of the second aspect, the feeding port is located between the heating element and the cooling fan.

[0023] As described above, the embodiments of the present disclosure provide a battery lithium extraction device and a battery lithium extraction production equipment. The battery lithium extraction device includes a collection bin, including a collection chamber, and a feed port and a discharge port connected to the upper and lower parts of the collection chamber; a material drop channel is formed between the feed port and the discharge port; at least one first grinding and screening assembly is arranged along the material drop channel; each of the first grinding and screening assemblies includes a first grinding unit and a first sweeping and screening unit arranged up and down; the first grinding unit includes a first grinding part and a second grinding part that rotate relative to each other, and a first grinding channel for accommodating electrode slurry is formed between the first grinding part and the second grinding part; the first grinding part and the second grinding part are made of piezoelectric material; the first sweeping and screening unit includes a first sweeping and screening part and a second sweeping and screening part that rotate relative to each other, and a first sweeping and screening channel for receiving the falling electrode slurry is formed between the first sweeping and screening part and the second sweeping and screening part are made of piezoelectric material; the electrode slurry is a mixture of lithium battery electrode crushed material and water; wherein, the first grinding part and the second grinding part, and the first sweeping and screening part and the second sweeping and screening part are squeezed based on their respective relative rotations to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water. The battery lithium extraction production equipment includes a heating device, an air distribution device, a mixing device and the battery lithium extraction device. The heating device includes a heating bin and a heating element arranged in the heating bin; the heating bin includes a feeding port and a feeding port. The air distribution device includes a dispersion fan and an air equalization box; the air outlet of the air equalization box is arranged in the heating bin in alignment with the feeding port, and the dispersion fan is arranged on the wall surface of the air equalization box where the air outlet is located. The mixing device includes a mixing tank and a stirring element; the mixing tank includes a mixing chamber and a feeding port, a liquid inlet and a liquid inlet connected to the mixing chamber; the feeding port is connected to the feeding port; the liquid inlet is connected to the feeding port; the stirring element is arranged in the mixing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure shows the overall structure diagram of the battery lithium extraction device in the embodiment of the present disclosure;

[0025] Figure 2 FIG. 1 is a cross-sectional schematic diagram of a battery lithium extraction device in an embodiment of the present disclosure;

[0026] Figure 3 The present disclosure is shown in Figure 2 Schematic cross-sectional view of AA in the figure;

[0027] Figure 4 The present disclosure is shown in Figure 3 Schematic cross-sectional view of CC;

[0028] Figure 5 The present disclosure is shown in Figure 2 A schematic cross-sectional view of the middle BB;

[0029] Figure 6 FIG. 1 is a schematic cross-sectional view of the overall structure including a second grinding and screening assembly in another embodiment of the present disclosure;

[0030] Figure 7 The present disclosure is shown in Figure 6 Schematic cross-sectional view of the middle DD;

[0031] Figure 8 The present disclosure is shown in Figure 6 Schematic cross-sectional view of EE;

[0032] Fig. 9 The figure shows the overall structure of the battery lithium extraction production equipment disclosed in the present invention;

[0033] Fig.10 The present disclosure is shown in Fig. 9 Enlarged view of middle F;

[0034] Fig.11 The present disclosure is shown in Fig. 9 Enlarged view of G in the middle.

[0035] Reference numerals:

[0036] 100, battery lithium extraction device; 110, collection bin; 1101, collection chamber; 1102, feed port; 1103, discharge port; 1104, guide port; 120, first grinding and screening assembly; 121, first grinding unit; 1211, first grinding part; 12111, first filter plate; 121111, first filter hole; 12112, extrusion ring; 12113, extrusion block; 12114, inner grinding block; 1212, second grinding part; 12121, outer grinding block; 1213, first blocking member; 12131, first telescopic member; 12132, first blocking plate; 122, first sweeping and screening unit; 1221, first sweeping and screening part; 12211, first a first sweeping screen ring; 12212, a first sweeping plate; 1222, a second sweeping screen portion; 12221, a second filter plate; 122211, a second filter hole; 130, a driving member; 140, a second grinding and screening assembly; 141, a second grinding unit; 1411, a third grinding portion; 14111, a third filter plate; 141111, a tumbling block; 141112, a third filter hole; 1412, a fourth grinding portion; 14121, a stirring column; 142, a second sweeping screen unit; 1421, a third sweeping screen portion; 14211, a second sweeping screen ring; 14212, a second sweeping plate; 1422, a fourth sweeping screen portion; 14221, a fourth filter plate; 142211, a fourth filter hole;

[0037] 200, heating device; 210, heating chamber; 2101, heating chamber; 2102, feeding port; 2103, feeding port; 220, heating element;

[0038] 300, air distribution device; 310, air distribution fan; 320, air distribution box; 3201, air distribution cavity; 3202, air outlet;

[0039] 400, mixing device; 410, mixing tank; 4101, mixing chamber; 4102, feed port; 4103, infusion port; 4104, liquid inlet; 411, buffer box; 41101, liquid outlet; 420, stirring element; 421, motor; 422, stirring impeller;

[0040] 500. Storage containers;

[0041] 600. Conveying unit. DETAILED DESCRIPTION

[0042] Figure 1 Shown in the figure is a schematic diagram of the overall structure of the battery lithium extraction device in an embodiment of the present disclosure. Figure 2 The figure shows a cross-sectional schematic diagram of a battery lithium extraction device in an embodiment of the present disclosure. Figure 1 and Figure 2 In the example, the battery lithium extraction device 100 includes a collection bin 110 and at least one first grinding and screening assembly 120. The collection bin 110 includes a collection chamber 1101, and an inlet 1102 and an outlet 1103 arranged above and below the collection chamber 1101; a material drop channel is formed between the inlet 1102 and the outlet 1103.

[0043] The at least one first grinding and screening assembly 120 is arranged along the material dropping channel; each of the first grinding and screening assemblies 120 includes a first grinding unit 121 and a first sweeping and screening unit 122 arranged up and down; the first grinding unit 121 includes a first grinding portion 1211 and a second grinding portion 1212 that rotate relative to each other, and a first grinding channel for accommodating electrode slurry is formed between the first grinding portion 1211 and the second grinding portion 1212; the first grinding portion 1211 and the second grinding portion 1212 are made of piezoelectric material; the first sweeping and screening unit 122 includes a first sweeping and screening portion 1211 that rotates relative to each other 21 and a second sweeping sieve part 1222, a first sweeping sieve channel for receiving the falling electrode slurry is formed between the first sweeping sieve part 1221 and the second sweeping sieve part 1222; the first sweeping sieve part 1221 and the second sweeping sieve part 1222 are made of piezoelectric material; the electrode slurry is a mixture of lithium battery electrode crushed material and water; wherein, between the first grinding part 1211 and the second grinding part 1212, and between the first sweeping sieve part 1221 and the second sweeping sieve part 1222, a piezoelectric effect is generated due to the extrusion formed by their relative rotation, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

[0044] The advantage of the above arrangement is that when the first grinding part 1211 and the second grinding part 1212 rotate relative to each other, they can not only crush and grind the pole powder, but also precipitate lithium ions into water through the piezoelectric effect generated by extrusion, thereby improving the lithium extraction effect of the battery lithium extraction device 100. When the first sweeping screen part 1221 and the second sweeping screen part 1222 rotate relative to each other, they can not only filter the pole powder with a suitable particle size out of the discharge port 1103, but also precipitate lithium ions into water through the piezoelectric effect generated, thereby further improving the lithium extraction effect of the battery lithium extraction device 100.

[0045] Exemplarily, the first grinding and screening assembly 120 can also be implemented in multiple stages. The multiple stages of the first grinding and screening assembly 120 are arranged up and down along the material drop channel. The aperture of the screening holes in the multiple stages of the first grinding and screening assembly 120 decreases along the depth direction of the material drop channel. The advantage of such a setting is that the multiple stages of the first grinding and screening assembly 120 can increase the amount of lithium ions in the pole powder precipitated into water by improving the piezoelectric grinding effect on the pole powder, thereby improving the effect of lithium extraction from the battery.

[0046] Figure 3 The present disclosure is shown in Figure 2 AA cross-sectional view. Figure 2 and Figure 3As can be seen from the example, the first grinding part 1211 includes a first filter plate 12111 and an extrusion ring 12112 disposed on the top wall of the first filter plate 12111, and the extrusion ring 12112 includes a plurality of extrusion blocks 12113 spaced apart along the circumferential direction; the second grinding part 1212 includes a plurality of outer grinding blocks 12121 spaced apart and disposed on the circumferential wall of the collecting chamber 1101. In other words, the first grinding channel is formed in the space between the first filter plate 12111, the first extrusion ring 12112 and the plurality of outer grinding blocks 12121. In another embodiment, the surfaces of the extrusion blocks 12113 and the outer grinding blocks 12121 are provided with a plurality of evenly distributed grinding teeth.

[0047] Further exemplarily, the first filter plate 12111 is provided with a plurality of inner grinding blocks 12114 spaced apart along the circumference thereof. The inner grinding blocks 12114 are made of piezoelectric material. The extrusion ring 12112 is located between the plurality of outer grinding blocks 12121 and the plurality of inner grinding blocks 12114. The advantage of such a configuration is that the extrusion blocks 12113 on the extrusion ring 12112 can be extruded with both the inner grinding blocks 12114 and the outer grinding blocks 12121, thereby further improving the grinding effect of the pole powder in the first grinding unit 121.

[0048] Illustratively, the first filter plate 12111 includes a plurality of first filter holes 121111 that are evenly distributed. Figure 4 The present disclosure is shown in Figure 3 Schematic diagram of the cross-section of CC. Figure 3 and Figure 4In the example, a plurality of first blocking members 1213 corresponding to the number and position of some of the first filter holes 121111 are provided in the first filter plate 12111. Each of the first blocking members 1213 includes a first telescopic member 12131 and a first blocking plate 12132 provided at the output end of the first telescopic member 12131. Among them, the first blocking plate 12132 blocks the corresponding first filter hole 121111 when the first telescopic member 12131 is extended. The advantage of the above arrangement is that before the electrode slurry enters the collecting chamber 1101, a plurality of the first telescopic members 12131 are extended to allow the first blocking plate 12132 to block the corresponding first filter hole 121111. In this way, it can be avoided that during the grinding process of the electrode powder, the lithium ions precipitated from the electrode powder under the piezoelectric effect cannot be effectively transferred to the water because the water in the electrode slurry has quickly flowed from the first filter hole 121111 to the first scanning unit 122. That is, the first sealing plate 12132 blocks the first filter hole 121111 to extend the mixing time of the pole powder and water in the first grinding unit 121, thereby increasing the amount of lithium ions in the pole powder precipitated into the water under the piezoelectric effect, thereby further improving the battery lithium extraction effect of the battery lithium extraction device 100.

[0049] Figure 5 The present disclosure is shown in Figure 2 BB cross-sectional view. Figure 2 and Figure 5 It can be seen from the example that the first sweeping screen part 1221 includes a first sweeping screen ring 12211 and a plurality of first sweeping plates 12212; the plurality of first sweeping plates 12212 are arranged at intervals on the outer wall of the first sweeping screen ring 12211 and extend radially outward along the first sweeping screen ring 12211. The second sweeping screen part 1222 includes a second filter plate 12221 arranged below the first sweeping screen ring 12211. The advantage of the above arrangement is that when the first sweeping screen ring 12211 and the plurality of first sweeping plates 12212 and the second filter plate 12221 rotate relative to each other, they can not only sweep and crush the inner pole powder falling into the first sweeping screen channel, but also produce an effect and the same as when they rotate relative to each other. Figure 3 The same piezoelectric effect in the examples is for the lithium ions in the lithium powder to precipitate into water, so it will not be described here.

[0050] Exemplarily, the second filter plate 12221 includes a plurality of evenly distributed second filter holes 122211. The aperture of the second filter hole 122211 is smaller than the aperture of the first filter hole 121111. The advantage of such a configuration is that the pole powder in the first grinding channel can only fall into the first sieving channel when it is ground to a particle size smaller than the aperture of the first filter hole 121111, and the second filter hole 122211 with an aperture smaller than the first filter hole 121111 can prevent the pole powder in the first grinding channel from flowing from the second filter hole 122211 to the discharge port 1103 together with the water during the sieving process of separating the pole powder and water, that is, improving the separation effect of the pole powder and water.

[0051] Exemplarily, the shapes and sizes of the first filter plate 12111 and the second filter plate 12221 are adapted to the cross-sectional shape of the collecting chamber 1101. For example, the cross-sectional shape of the collecting chamber 1101 and the first filter plate 12111 and the second filter plate 12221 are all implemented as circles.

[0052] exist Figure 1 In the example, the collecting bin 110 further includes a material guide port 1104 for allowing the polar powder on the second filter plate 12221 to flow out of the collecting chamber 1101 .

[0053] exist Figure 1 and Figure 2 In the example, the battery lithium extraction device 100 further includes a driving member 130. Exemplarily, the output shaft of the driving member 130 connects and drives the first filter plate 12111 and the second filter plate 12221 or the first sweeping screen ring 12211. In this embodiment, the driving member 130 is arranged at the top of the collection bin 110, and its output shaft is inserted into the collection chamber 1101 to connect and drive the first filter plate 12111 and the second filter plate 12221; and the first sweeping plate 12212 on the first sweeping screen ring 12211 is fixedly connected to the wall of the collection chamber 1101. In another embodiment, the driving member 130 can also be implemented as being arranged on the top wall of the collection chamber 1101, and its output shaft is inserted into the collection chamber 1101 to connect and drive the first filter plate 12111 and the first sweeping screen ring 12211; and the second filter plate 12221 is fixedly connected to the wall of the collection chamber 1101.

[0054] Figure 6 FIG. 1 is a schematic cross-sectional view of the overall structure of another embodiment of the present disclosure including a second grinding and screening assembly. Figure 6 In the example, the battery lithium extraction device 100 further includes a second grinding and screening assembly 140 , which is arranged below the first grinding and screening assembly 120 along the material dropping channel.

[0055] The second grinding and screening assembly 140 includes a second grinding unit 141 and a second scanning and screening unit 142 arranged vertically; the second grinding unit 141 includes a third grinding part 1411 and at least one fourth grinding part 1412 that rotate relative to each other, and a second grinding channel for accommodating electrode slurry is formed between the third grinding part 1411 and the at least one fourth grinding part 1412; the third grinding part 1411 and the at least one fourth grinding part 1412 are made of piezoelectric material. The second sweeping screen unit 142 includes a third sweeping screen part 1421 and a fourth sweeping screen part 1422 that rotate relative to each other, and a second sweeping screen channel for receiving the falling electrode slurry is formed between the third sweeping screen part 1421 and the fourth sweeping screen part 1422; the third sweeping screen part 1421 and the fourth sweeping screen part 1422 are made of piezoelectric material; wherein, the third grinding part 1411 and at least one fourth grinding part 1412, and the third sweeping screen part 1421 and the fourth sweeping screen part 1422 form extrusion based on their respective relative rotation to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

[0056] Those skilled in the art can understand that the provision of the second grinding and screening assembly 140 can further improve the degree of grinding and crushing and the degree of screening and separation of the pole powder, and improve the lithium extraction effect of the battery lithium extraction device 100 by increasing the amount of lithium ions in the pole powder precipitated into water.

[0057] For example, the structures of the first grinding and screening assembly 120 and the second grinding and screening assembly 140 may be implemented as the same or different. In this embodiment, the structures of the first grinding and screening assembly 120 and the second grinding and screening assembly 140 are implemented as different. In another embodiment, the structures of the first grinding and screening assembly 120 and the second grinding and screening assembly 140 are implemented as the same.

[0058] Figure 7 The present disclosure is shown in Figure 6 Schematic diagram of the cross-section of DD. Figure 7 In the example, the third grinding part 1411 includes a third filter plate 14111, and the third filter plate 14111 is rotatably arranged in the collection chamber 1101. The top wall of the third filter plate 14111 is connected with a plurality of tumbling blocks 141111 distributed along its circumferential direction and extending in the radial direction. Exemplarily, the tumbling blocks 141111 are fixedly or detachably connected to the top wall of the third filter plate 14111. For example, the fixed connection method is implemented as welding; the detachable connection method is implemented as screw connection or clamping. Exemplarily, the third filter plate 14111 has a plurality of evenly distributed third filter holes 141112. In another embodiment, the tumbling blocks 141111 and the third filter plate 14111 can also be implemented as an integrally processed molding.

[0059] Exemplarily, each of the fourth grinding parts 1412 includes a plurality of stirring columns 14121 that are spaced apart along the circumference of the collecting chamber 1101 and are radially extended and arranged on the side wall of the collecting chamber 1101. Further exemplarily, the fourth grinding part 1412 is implemented as a plurality of the plurality of fourth grinding parts 1412 that are spaced apart along the depth direction of the blanking channel, and the stirring columns 14121 in two adjacent fourth grinding parts 1412 are staggered. This further improves the crushing effect of the second grinding unit 141 on the pole powder.

[0060] Those skilled in the art can understand that, when the third filter plate 14111 rotates, the electrode slurry falling into the second grinding unit 141 is tumbled by the plurality of tumbling blocks 141111, and the tumbled electrode powder contacts the stirring column 14121 and is stirred by the stirring column 14121. In this process, the second grinding unit 141 can not only fully stir the electrode powder and water to accelerate the precipitation of lithium ions in the electrode powder into the water, but also can cause the electrode powder to precipitate lithium ions under the piezoelectric effect due to the deformation of the tumbling blocks 141111 and the stirring column 14121 made of conductive materials.

[0061] Figure 8 The present disclosure is shown in Figure 6 Schematic diagram of the cross-section of EE. Figure 8 In the example, the third sweeping screen portion 1421 includes a second sweeping screen ring 14211, and a plurality of second sweeping plates 14212 which are arranged at intervals on the outer wall of the second sweeping screen ring 14211 and extend radially outward. The fourth sweeping screen portion 1422 includes a fourth filter plate 14221 arranged below the second sweeping screen ring 14211, and the fourth filter plate 14221 has a plurality of evenly distributed fourth filter holes 142211. The advantage of the above arrangement is that when the second sweeping screen ring 14211 and the plurality of second sweeping plates 14212 rotate relative to the fourth filter plate 14221, not only can the pole powder be swept and crushed, but also the pole powder can be produced in the relative rotation. Figure 7 The same piezoelectric effect in the examples is for the lithium ions in the lithium powder to precipitate into water, so it will not be described here.

[0062] Exemplarily, the output shaft of the driving member 130 is connected to the third filter plate 14111 and the fourth filter plate 14221 in sequence and drives the third filter plate 14111 and the fourth filter plate 14221 to rotate, and the second sweeping plate 14212 on the second sweeping ring 14211 is fixedly connected to the side wall of the collecting chamber 1101. In another embodiment, the output shaft of the driving member 130 is connected to the second sweeping ring 14211, and the fourth filter plate 14221 is fixedly connected to the side wall of the collecting chamber 1101.

[0063] exist Figure 6 In the embodiment, the collecting bin 110 further includes a material guide port 1104 for allowing the pole powder on the fourth filter plate 14221 to flow out of the collecting chamber 1101 .

[0064] Exemplarily, the aperture of the fourth filter hole 142211 is smaller than the aperture of the third filter hole 141112. Further exemplarily, the apertures of the first filter hole 121111, the second filter hole 122211, the third filter hole 141112 and the fourth filter hole 142211 gradually decrease along the depth direction of the material drop channel. The advantage of such a setting is that only when the particles are ground to a smaller diameter than the first filter hole 121111, the second filter hole 122211 and the third filter hole 141112 in sequence can they continue to fall along the material drop channel, and the fourth filter plate 14221 is used to separate the pole powder and the water containing lithium ions, and the separated pole powder is guided out of the collection chamber 1101 from the guide port 1104, and the separated water flows out of the collection chamber 1101 from the discharge port 1103.

[0065] It should be noted that, in actual production, the apertures of the first filter hole 121111, the second filter hole 122211, the third filter hole 141112 and the fourth filter hole 142211 are all smaller than those shown in the accompanying drawings, which are only schematic diagrams and do not represent actual sizes.

[0066] Fig. 9 The figure shows the overall structure of the battery lithium extraction production equipment disclosed in the present invention. Fig. 9 In the example, the second aspect of the present disclosure provides a battery lithium extraction production equipment, which includes a gas distribution device 300, a heating device 200, a mixing device 400 and the battery lithium extraction device 100 which are sequentially connected and arranged along the conveying direction.

[0067] Exemplarily, the heating device 200 includes a heating chamber 210 and a heating element 220. The heating chamber 210 includes a heating chamber 2101 and a feeding port 2102 and a feeding port 2103 communicating with the heating chamber 2101. The heating element 220 is disposed in the heating chamber 2101. Preferably, the heating element 220 is disposed close to the feeding port 2103.

[0068] Fig.10 The present disclosure is shown in Fig. 9 A magnified view of F. Fig.10In the example, the air distribution device 300 includes a dispersion fan 310 and an air equalization box 320. The air equalization box 320 is embedded in the heating chamber 210 and aligned with the feed port 2103. For example, the heating chamber 210 has a mounting port (not shown in the figure) connected to the heating chamber 2101, and the air equalization box 320 is embedded in the mounting port. The dispersion fan 310 is arranged on the wall of the air equalization box 320 aligned with the feed port 2103 to blow the gas overflowing from the air equalization box 320 toward the annular heating element 220. The air distribution device 300 is used to transport at least one of argon, nitrogen, helium, neon, and krypton into the heating chamber 210 to prevent the broken pole pieces from being oxidized.

[0069] The advantage of the above arrangement is that the heating device 200 heats the gas ejected from the gas distribution device 300, and while providing heat, cooperates with the emitted hot air to pyrolyze the PVDF in the electrode sheet material, so as to facilitate the subsequent separation of lithium iron phosphate powder.

[0070] Further illustratively, the feeding port 2102 is located between the annular heating element 220 and the air distribution device 300 (by Fig. 9 As can be seen). In this way, the contact time and area between the inert gas and the broken electrode pieces can be increased to prevent the broken electrode pieces from being oxidized, and at the same time, the broken electrode pieces can be blown into the annular heating element 220.

[0071] exist Fig.10 In the example, the gas equalization box 320 includes a gas equalization cavity 3201 and a plurality of gas outlets 3202. The plurality of gas outlets 3202 are formed on the gas equalization box 320 and aligned with the wall surface of the material delivery port 2103 at intervals along the circumference of the fan 310, thereby improving the uniformity of gas overflow.

[0072] Fig.11 The present disclosure is shown in Fig. 9 A magnified view of G. Fig.11In the example, the mixing device 400 includes a mixing tank 410 and a stirring member 420. The mixing tank 410 includes a mixing chamber 4101 and a feed port 4102, a liquid inlet 4103 and a liquid inlet 4104 connected to the mixing chamber 4101; the stirring member 420 is rotatably arranged in the mixing chamber 4101. Exemplarily, the liquid inlet 4103 of the mixing chamber 4101 is connected to the feed port 1102, and a pump body is arranged between the liquid inlet 4103 and the feed port 1102, which is used to pump the electrode slurry in the mixing chamber 4101 into the collecting chamber 1101. The feed port 2103 is connected to the feed port 4102. The stirring member 420 includes a motor 421 and a stirring impeller 422. The motor 421 is arranged at the top of the mixing tank 410, and the stirring impeller 422 is arranged on the output shaft of the motor 421 inserted into the mixing chamber 4101.

[0073] Exemplarily, a buffer box 411 is provided in the mixing tank 410. The liquid inlet 4104 is connected to the inside of the buffer box 411, and a liquid outlet 41101 is provided at the bottom of the buffer box 411. It can be understood that the buffer box 411 can keep the water mixed with the pole powder entering the mixing chamber 4101 at a stable flow rate, and at the same time, the flow rate of the liquid outlet 41101 can be increased because the diameter of the liquid outlet 41101 is smaller than the diameter of the liquid inlet 4104, so that the water flowing out of the liquid outlet 41101 can disperse the lumped pole powder, thereby improving the uniformity of mixing the pole powder and water.

[0074] Preferably, the liquid outlet is aligned with the area enclosed by the infusion port 4103 in the mixing chamber 4101, and the flow direction of the liquid outlet 41101 is perpendicular to the flow direction of the infusion port 4103. The advantage of this arrangement is that the high-flow water flowing out of the liquid outlet 41101 can disperse the clumps of polar powder blocking the infusion port 4103, thereby avoiding the infusion port 4103 from being blocked.

[0075] Back to Fig. 9 In the example, the battery lithium extraction production equipment further includes a storage container 500. The opening of the storage container 500 is connected to the discharge port 1103 of the collection chamber 1101 to receive the separated lithium ion-rich liquid. The battery lithium extraction production equipment further includes a conveying unit 600. The feed end of the conveying unit 600 is aligned with the guide port 1104 to receive the separated pole powder.

[0076] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. A battery lithium extraction device, characterized in that: include: The collecting bin comprises a collecting chamber, and an inlet and an outlet arranged at the upper and lower parts thereof and connected to the collecting chamber; A material dropping channel is formed between the feed port and the discharge port; At least one first grinding and screening assembly is arranged along the material dropping channel; each of the first grinding and screening assemblies comprises a first grinding unit and a first sweeping and screening unit arranged up and down; The first grinding unit comprises a first grinding part and a second grinding part which rotate relative to each other, and a first grinding channel for accommodating electrode slurry is formed between the first grinding part and the second grinding part; the first grinding part and the second grinding part are made of piezoelectric material; The first sweeping screen unit comprises a first sweeping screen part and a second sweeping screen part which rotate relatively, and a first sweeping screen channel for receiving the falling electrode slurry is formed between the first sweeping screen part and the second sweeping screen part; the first sweeping screen part and the second sweeping screen part are made of piezoelectric material; the electrode slurry is a mixture of lithium battery electrode sheets and water; The relative rotation between the first grinding part and the second grinding part, and between the first scavenging part and the second scavenging part forms an extrusion to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

2. The battery lithium extraction device according to claim 1, characterized in that: The first grinding and screening assembly is implemented in multiple stages, and the multiple stages of the first grinding and screening assembly are arranged up and down along the material dropping channel; the apertures of the screening holes in the multiple stages of the first grinding and screening assembly decrease along the depth direction of the material dropping channel.

3. The battery lithium extraction device according to claim 1, characterized in that: The first grinding part includes a first filter plate and an extrusion ring arranged on the top wall of the first filter plate, and the extrusion ring includes a plurality of extrusion blocks distributed at intervals along the circumferential direction; the second grinding part includes a plurality of outer grinding blocks distributed at intervals on the circumferential wall of the collection chamber.

4. The battery lithium extraction device according to claim 3, characterized in that: The first filter plate includes a plurality of first filter holes; a plurality of first blocking members corresponding to the number and position of some of the first filter holes are arranged in the first filter plate; each of the first blocking members includes a first telescopic member and a first blocking plate arranged at the output end of the first telescopic member, and the first blocking plate blocks the corresponding first filter hole when the first telescopic member is extended.

5. The battery lithium extraction device according to claim 1, characterized in that: The first sweeping screen part includes a first sweeping screen ring and a plurality of first sweeping plates which are arranged at intervals on the outer wall of the first sweeping screen ring and extend radially outward; the second sweeping screen part includes a second filter plate arranged below the first sweeping screen ring.

6. The battery lithium extraction device according to claim 1, characterized in that: It also includes a second grinding and screening assembly, which is arranged below the first grinding and screening assembly along the material dropping channel; the second grinding and screening assembly includes a second grinding unit and a second sweeping screen unit arranged up and down; the second grinding unit includes a third grinding part and at least a fourth grinding part that rotate relative to each other, and a second grinding channel for accommodating electrode slurry is formed between the third grinding part and the at least one fourth grinding part; the third grinding part and the at least one fourth grinding part are made of piezoelectric material; the second sweeping screen unit includes a third sweeping screen part and a fourth sweeping screen part that rotate relative to each other, and a second sweeping screen channel for receiving the falling electrode slurry is formed between the third sweeping screen part and the fourth sweeping screen part; the third sweeping screen part and the fourth sweeping screen part are made of piezoelectric material; wherein, the third grinding part and the at least one fourth grinding part, and the third sweeping screen part and the fourth sweeping screen part form extrusion based on their respective relative rotation to generate a piezoelectric effect, and the piezoelectric effect generates charge movement that causes lithium ions to precipitate into water.

7. The battery lithium extraction device according to claim 6, characterized in that: The third grinding section includes a third filter plate, and the top wall of the third filter plate is connected to a plurality of tumbling blocks which are distributed at intervals along the circumference and extend radially; the fourth grinding section includes a plurality of stirring columns which are distributed at intervals along the circumference of the collecting chamber and extend radially on the side wall of the collecting chamber; the third sweeping section includes a second sweeping ring, and a plurality of second sweeping plates which are distributed at intervals on the outer wall of the second sweeping ring and extend radially outward; the fourth sweeping section includes a fourth filter plate which is arranged below the second sweeping ring.

8. A battery lithium extraction production equipment, characterized in that: include: The battery lithium extraction device as claimed in any one of claims 1 to 7; A heating device, comprising a heating chamber and a heating element arranged in the heating chamber; The heating bin comprises a feeding port and a feeding port; The air distribution device comprises a dispersing fan and an air equalizing box; the air outlet of the air equalizing box is arranged on the heating bin so as to align with the material feeding port, and the dispersing fan is arranged on the wall surface of the air equalizing box where the air outlet is located; The mixing device comprises a mixing tank and a stirring element; the mixing tank comprises a mixing chamber and a feed inlet, a liquid inlet and a liquid inlet connected to the mixing chamber; the feed inlet is connected to the feed inlet; the liquid inlet is connected to the feed inlet; the stirring element is arranged in the mixing chamber.

9. The battery lithium extraction production equipment according to claim 8, characterized in that: A buffer box is arranged in the mixing chamber; the liquid inlet is connected to the buffer box, the liquid outlet at the bottom of the buffer box is aligned with the area in the mixing chamber surrounding the infusion port, and the flow direction of the liquid outlet is perpendicular to the flow direction of the infusion port.

10. The battery lithium extraction production equipment according to claim 8, characterized in that: The feeding port is located between the heating element and the cooling fan.

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