Battery lithium extraction preprocessing device and battery lithium extraction production equipment

Abstract

The embodiment of the utility model provides a battery lithium extraction preprocessing device and battery lithium extraction production equipment. The battery lithium extraction pre-processing device comprises a heating assembly and a mixing assembly. The heating assembly comprises a heating bin and a heating piece; the heating bin comprises a heating cavity, and a feeding port and a conveying port which are communicated with the heating cavity; the heating piece is arranged in the heating bin to heat the battery electrode crushed materials. The mixing assembly comprises a mixing tank and a stirring piece; the mixing tank comprises a mixing cavity, and a material inlet and a liquid inlet which are communicated with the mixing cavity; the feeding hole is communicated with the conveying hole so as to receive the heated battery electrode crushed materials; the stirring part is arranged in the mixing cavity to stir the battery electrode crushed materials and liquid flowing in from the liquid inlet. The battery lithium extraction production equipment comprises the battery lithium extraction preprocessing device. The heating device has the advantages that the heating piece can heat the battery electrode crushed materials, so that the easiness degree that the battery electrode crushed materials are crushed subsequently is improved. And the stirring piece is used for stirring and crushing the crushed battery electrode materials and water entering the mixing cavity to form electrode slurry.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery lithium extraction, and particularly relates to a battery lithium extraction pre-processing device and a battery lithium extraction production equipment. BACKGROUND

[0002] With the rapid development of electric vehicles, energy storage systems and other fields, the use of secondary batteries represented by lithium batteries has shown explosive growth. However, the 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 battery retirement wave of lithium batteries. In the face of battery recycling, lithium recovery from recycled lithium batteries is an important part of it. In the traditional recycling method, aluminum particles and positive electrode powder are easily mixed, which cannot directly extract lithium in one step, resulting in low lithium comprehensive recovery rate and environmental problems. Therefore, there is an urgent need for a recycling technology that can pre-process the positive plate of lithium iron phosphate battery to meet the growing demand for battery recycling and the requirements of sustainable resource development. SUMMARY

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

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

[0005] A heating assembly comprising a heating bin and a heating piece; the heating bin comprises a heating cavity, and a feeding port and a feeding port communicating with the heating cavity; the heating piece is arranged in the heating bin to heat the battery electrode fragments;

[0006] A mixing assembly comprising a mixing tank and a stirring piece; the mixing tank comprises a mixing cavity, and a feeding port and a liquid inlet communicating with the mixing cavity; the feeding port communicates with the feeding port to receive the heated battery electrode fragments; the stirring piece is arranged in the mixing cavity to stir the battery electrode fragments and the liquid flowing into the liquid inlet to form an electrode slurry; the mixing tank further comprises a liquid outlet for outputting the electrode slurry.

[0007] In an embodiment of the first aspect, a buffer box is arranged in the mixing cavity; an inner end of the liquid inlet communicates with a box cavity of the buffer box, and the buffer box is further provided with a liquid outlet; the liquid outlet is higher than the stirring piece.

[0008] In an embodiment of the first aspect, the liquid outlet is aligned with an area surrounding the liquid outlet in the mixing cavity, and the flow direction of the liquid outlet is perpendicular to the flow direction of the liquid outlet.

[0009] In an embodiment of the first aspect, the buffer box is arranged in a ring shape; the liquid outlet is implemented as a plurality of liquid outlets, and the plurality of liquid outlets are evenly distributed at the bottom of the buffer box.

[0010] In an embodiment of the first aspect, the gas distribution assembly further comprises a gas cavity for supplying the protective gas, and an outlet of the gas cavity is connected to the heating cavity.

[0011] In an embodiment of the first aspect, the gas distribution assembly further comprises a gas cavity for supplying the protective gas, and an outlet of the gas cavity is connected to the heating cavity.

[0012] In an embodiment of the first aspect, the outlet comprises a plurality of gas outlets, and the plurality of gas outlets are uniformly distributed.

[0013] In an embodiment of the first aspect, the gas cavity is connected to a gas container for supplying the protective gas.

[0014] In an embodiment of the first aspect, the feeding port has a guide portion with an opening gradually reduced along the feeding direction; and / or, a cover is movably connected to the top of the heating chamber for opening or closing the feeding port.

[0015] The second aspect of the present disclosure provides a battery lithium extraction preprocessing device, comprising the battery lithium extraction preprocessing device.

[0016] As described above, the embodiments of the present disclosure provide a battery lithium extraction preprocessing device and a battery lithium extraction production equipment. The battery lithium extraction preprocessing device comprises a heating assembly and a mixing assembly. The heating assembly comprises a heating chamber and a heating member. The heating chamber comprises a heating cavity, a feeding port and a feeding outlet connected to the heating cavity. The heating member is arranged in the heating chamber to heat the battery electrode crushed material. The mixing assembly comprises a mixing tank and a stirring member. The mixing tank comprises a mixing cavity, a feeding inlet and a liquid inlet connected to the mixing cavity. The feeding inlet is connected to the feeding outlet to receive the heated battery electrode crushed material. The stirring member is arranged in the mixing cavity to stir the battery electrode crushed material and the liquid flowing into the liquid inlet to form electrode slurry. The mixing tank further comprises a liquid outlet for outputting the electrode slurry. The battery lithium extraction production equipment comprises the battery lithium extraction preprocessing device. The heating member in the embodiments of the present disclosure can heat the battery electrode crushed material to improve the ease of subsequent stirring and crushing of the battery electrode crushed material. The stirring member can stir and crush the battery electrode crushed material and water entering the mixing cavity to form electrode slurry. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 shows a schematic diagram of the overall structure of a battery lithium extraction preprocessing device in an embodiment of the present disclosure;

[0018] Figure 2 FIG. 2 shows a schematic diagram of the overall structure of a battery lithium extraction preprocessing device in an embodiment of the present disclosure; Figure 1Enlarged view of the middle A;

[0019] Figure 3 A cross-sectional view of a buffer box in the present disclosure is shown in the middle B. Figure 1 Enlarged view of the middle B;

[0020] Figure 4 A cross-sectional view of a buffer box in the present disclosure is shown in the middle B.

[0021] Figure 5 A schematic view of the overall structure of the battery lithium extraction production equipment is shown in the middle.

[0022] Reference signs:

[0023] 100, battery lithium extraction device;

[0024] 200, heating assembly; 210, heating bin; 2101, heating cavity; 2102, feeding port; 21021, guide part; 2103, feeding port; 220, heating part;

[0025] 300, gas distribution assembly; 310, gas blowing part; 3201, gas cavity; 3202, gas outlet; 330, gas container;

[0026] 400, mixing assembly; 410, mixing tank; 4101, mixing cavity; 4102, feeding port; 4103, liquid outlet; 4104, liquid inlet; 411, buffer box; 41101, liquid outlet; 420, stirring part; 421, motor; 422, stirring impeller. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure will be described in detail below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the messages disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different embodiments or modules, and the details in the present disclosure can be modified or changed in different perspectives and applications without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0028] The embodiments of the present disclosure will be described in detail below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the messages disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different embodiments or modules, and the details in the present disclosure can be modified or changed in different perspectives and applications without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0029] In the description of the present disclosure, the expressions "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like mean that the specific feature, structure, material or characteristic accompanying the embodiments or examples is included in at least one embodiment or example of the present disclosure. Also, the specific feature, structure, material or characteristic accompanying an embodiment or example can be combined in an appropriate manner with the specific feature, structure, material or characteristic accompanying other embodiments or examples and other embodiments or examples in the present disclosure. In addition, the embodiments or examples and the features of the embodiments or examples expressed in the present disclosure can be combined and combined by those skilled in the art without contradiction.

[0030] In addition, the terms "first", "second", etc. are used only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a group" is two or more, unless specifically limited.

[0031] In order to clearly illustrate the present disclosure, devices irrelevant to the description are omitted, and the same reference numerals are given to the same or similar constituent elements throughout the description.

[0032] Throughout the description, when it is said that a device is "connected" to another device, it includes not only the case of "direct connection", but also the case of "indirect connection" in which other elements are placed therebetween. In addition, when it is said that a device "includes" a certain constituent element, unless specifically stated to the contrary, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0033] Although the terms first, second, etc. are used herein to refer to various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are indicated. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", mean that the described features, steps, operations, elements, modules, items, kinds and / or groups are present, but do not exclude the presence or addition of one or more other features, steps, operations, elements, modules, items, kinds and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean that any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". This exception occurs only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0034] The professional terms used herein are used only to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein, unless the context clearly indicates otherwise, also includes the plural form. The meaning of "include" used in the specification is to specify a certain feature, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and / or components.

[0035] Although not differently defined, the technical terms and scientific terms used herein include the meanings commonly understood by those skilled in the art to which the present disclosure belongs. The terms defined in a general dictionary are additionally interpreted to have meanings consistent with related technical documents and the messages currently presented, unless defined, and should not be over-interpreted as ideal or very formal meanings.

[0036] With the rapid development of electric vehicles, energy storage systems, etc., the use of lithium batteries as a representative of secondary batteries has shown explosive growth. However, the 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 battery retirement wave of lithium batteries. In the face of battery recycling, recycling lithium from lithium batteries is an important part. In the traditional recycling method, aluminum particles and positive electrode powder are easily mixed, which cannot directly extract lithium in one step, resulting in low lithium comprehensive recovery rate and environmental problems. Therefore, there is an urgent need for a recycling technology that can pre-process the positive electrode sheet of lithium iron phosphate batteries to meet the growing demand for battery recycling and the requirements of sustainable resource development.

[0037] Based on the above problems, the heating member in the embodiment of the present disclosure can heat the battery electrode fragments to improve the ease of subsequent chopping of the battery electrode fragments. The stirring member can stir and break the battery electrode fragments and water entering the mixing cavity to form electrode slurry.

[0038] Figure 1 The overall structure of the battery lithium extraction pre-processing device in the embodiment of the present disclosure is shown in FIG. 1. Figure 2 The overall structure of the battery lithium extraction pre-processing device in the embodiment of the present disclosure is shown in FIG. 1. Figure 1 The enlarged view of A in FIG. 1. Figure 3 The overall structure of the battery lithium extraction pre-processing device in the embodiment of the present disclosure is shown in FIG. 1. Figure 1 The enlarged view of B in FIG. 1.

[0039] In Figure 1 , 2 and Figure 3In an example, the battery lithium extraction pre-processing device comprises a heating assembly 200 and a mixing assembly 300. The heating assembly 200 comprises a heating bin 210 and a heating element 220; the heating bin 210 comprises a heating cavity 2101, and a feeding port 2102 and a feeding outlet 2103 communicating with the heating cavity 2101; the heating element 220 is arranged in the heating bin 210 to heat the battery electrode scrap.

[0040] Preferably, the heating element 220 is arranged close to the feeding outlet 2103. In an example, the heating element 220 is implemented as a tab or a heating wire. In this embodiment, the heating element 220 is arranged in the heating cavity 2101. In another embodiment, the heating element 220 is arranged on the outer wall of the heating bin 210 and covers the heating cavity 2101.

[0041] In an example, the mixing assembly 400 comprises a mixing tank 410 and a stirring element 420. The mixing tank 410 comprises a mixing cavity 4101, and a material inlet port 4102 and a liquid inlet port 4104 communicating with the mixing cavity 4101; the material inlet port 4102 communicates with the feeding outlet 2103 to receive the heated battery electrode scrap; the stirring element 420 is arranged in the mixing cavity 4101 to stir the battery electrode scrap and the liquid flowing in through the liquid inlet port 4104 to form electrode slurry. The mixing tank 410 further comprises a liquid outlet port 4103 communicating with the mixing cavity 4101, through which the mixed electrode slurry flows out of the mixing cavity 4101.

[0042] In an example, the stirring element 420 comprises a motor 421 and a stirring impeller 422. The motor 421 is arranged on 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 cavity 4101.

[0043] The above arrangement has the advantage that the heating element 220 can heat the battery electrode scrap to improve the ease of subsequent stirring and crushing of the battery electrode scrap. The stirring element 420 can stir and crush the battery electrode scrap and water entering the mixing cavity 4101 to form electrode slurry.

[0044] In Figure 2 In an example, the feeding port 2102 has a guide portion 21021 with an opening gradually decreasing along the falling direction. It can be understood that the guide portion 21021 can prevent the battery electrode scrap fed through the feeding port 2102 from directly entering the heating cavity 2101, thereby avoiding the accumulation of battery electrode scrap directly below the feeding port 2102 and improving the pre-processing efficiency of the battery electrode scrap.

[0045] In Figure 2In an example, the heating bin 210 is movably connected with a cover at the top for opening or closing the feeding opening 2102. In an example, the movable connection is implemented as a hinged or sliding connection.

[0046] In Figure 1 and Figure 2 In an example, the battery lithium extraction pre-processing device further comprises a gas distribution assembly 300; the gas distribution assembly 300 comprises a gas cavity 3201. The gas outlet of the gas cavity 3201 is communicated with the heating cavity 2101; the gas outlet is located upstream of the feeding opening 2102 in the feeding direction of the heating bin 210. In an example, the gas distribution assembly 300 further comprises a gas blowing member 310. The gas blowing member 310 is located upstream of the feeding opening 2102 in the feeding direction of the heating bin 210. The gas distribution assembly 300 is used to deliver a protective gas into the heating bin 210. For example, argon, nitrogen, helium, neon, krypton, to avoid oxidation of the battery electrode scrap. The advantage of the above arrangement is that the contact time and area of the inert gas with the battery electrode scrap can be improved, oxidation of the battery electrode scrap is avoided, and at the same time the battery electrode scrap is blown into the heating cavity 2101 covered by the heating member 220. The heating device 200 heats the gas blown out by the gas distribution assembly 300, providing heat while cooperating with the heat dissipated to pyrolyze the PVDF in the electrode scrap, to facilitate subsequent separation of lithium iron phosphate powder.

[0047] In another embodiment, the gas cavity 3201 and the heating cavity 2101 are integrated structures.

[0048] In an example, the gas cavity 3201 is communicated with a gas container 330 for supplying a protective gas. For example, a gas cylinder. For example, the gas container 330 is communicated with the gas cavity 3201 through a connecting pipe to deliver a protective gas to the gas cavity 3201.

[0049] In Figure 2 In an example, the gas outlet comprises a plurality of gas outlets 3202. The plurality of gas outlets 3202 are uniformly distributed to improve the uniformity of the overflow of the protective gas. In another embodiment, the gas outlet is implemented to comprise one gas outlet.

[0050] In Figure 3In the example, a buffer box 411 is provided inside the mixing tank 410. The inner end of the inlet 4104 is connected to the cavity of the buffer box 411, and the buffer box 411 is also provided with an outlet 41101. The outlet 41101 is higher than the stirring impeller 422. It can be understood that the buffer box 411 can maintain a stable flow rate of water mixed with the electrode powder entering the mixing chamber 4101, and at the same time, it can increase the flow rate of the outlet 41101 because the diameter of the outlet 41101 is smaller than the diameter of the inlet 4104, so that the water flowing out of the outlet 41101 can disperse the clumps of electrode powder, thereby improving the uniformity of the mixing of electrode powder and water.

[0051] Preferably, the outlet is aligned with the area within the mixing chamber 4101 that forms the infusion port 4103, and the flow direction of the outlet 41101 is perpendicular to the flow direction of the infusion port 4103. This arrangement has the advantage that the high-velocity water flowing from the outlet 41101 can disperse the clumps of electrode powder clogging the infusion port 4103, thereby preventing clogging.

[0052] Figure 4 The diagram shown is a cross-sectional view illustrating that the buffer box in this disclosure is implemented as a ring. Figure 4 In the example, the buffer box 411 is configured as an annular shape; multiple liquid outlets 41101 are implemented, and the multiple liquid outlets 41101 are evenly distributed at the bottom of the buffer box 411. Those skilled in the art will understand that the evenly distributed multiple liquid outlets 41101 can ensure uniform mixing of water and electrode powder, avoiding large clumps of electrode powder, thereby improving the mixing effect of electrode powder and water.

[0053] Preferably, one of the plurality of outlets is aligned with the region within the mixing chamber 4101 that surrounds the inlet 4103, and the flow direction of the outlet 41101 is perpendicular to the flow direction of the inlet 4103. The other outlet is aligned with the region within the mixing chamber 4101 that surrounds the inlet 4102, and the flow direction of the outlet 41101 is perpendicular to the flow direction of the inlet 4102. The advantage of this arrangement is that the high-velocity water flowing from these two outlets 41101 can disperse clumps of electrode powder clogging the inlet 4103 and the inlet 4102, thereby preventing clogging of the inlet 4103 and the inlet 4102. That is, in another embodiment, the outlets 41101 are implemented as a pair, according to the preferred embodiment described above.

[0054] Another embodiment of this disclosure provides a battery lithium extraction production apparatus. Figure 5A schematic diagram of an overall structure of a battery lithium extraction production device is shown in the figure. The battery lithium extraction production device includes a battery lithium extraction device 100 and the battery lithium extraction preprocessing device. The battery lithium extraction device 100 is used to receive electrode slurry.

[0055] In summary, the embodiments of the present disclosure provide a battery lithium extraction preprocessing device and a battery lithium extraction production device. The battery lithium extraction preprocessing device includes a heating assembly and a mixing assembly. The heating assembly includes a heating bin and a heating piece; the heating bin includes a heating cavity, and a feeding port and a feeding port communicated with the heating cavity; the heating piece is arranged in the heating bin to heat the broken battery electrode fragments. The mixing assembly includes a mixing tank and a stirring piece; the mixing tank includes a mixing cavity, and a feeding port and a liquid inlet communicated with the mixing cavity; the feeding port is communicated with the feeding port to receive the heated battery electrode fragments; the stirring piece is arranged in the mixing cavity to stir the battery electrode fragments and the liquid flowing into the liquid inlet. The battery lithium extraction production device includes the battery lithium extraction preprocessing device. The above arrangement has the advantage that the heating piece in the embodiments of the present disclosure can heat the battery electrode fragments to improve the ease of subsequent stirring and crushing of the battery electrode fragments. The stirring piece can stir and crush the battery electrode fragments and water entering the mixing cavity to form electrode slurry.

[0056] The above embodiments only exemplarily illustrate the principles and effects of the present disclosure, and are not used to limit the present disclosure. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical idea of the present disclosure should be covered by the protection scope of the present disclosure.

Claims

1. A battery lithium extraction pre-processing device, characterized in that, The application relates to a battery lithium extraction pre-processing device. The heating assembly comprises a heating bin and a heating element; the heating bin comprises a heating cavity, a feeding port and a feeding outlet; the heating element is arranged in the heating bin to heat the battery electrode scraps; the mixing assembly comprises a mixing tank and a stirring element; the mixing tank comprises a mixing cavity, a feeding inlet and a liquid inlet; the feeding inlet is communicated with the feeding outlet to receive the heated battery electrode scraps; the stirring element is arranged in the mixing cavity to stir the battery electrode scraps and the liquid flowing into the liquid inlet to form electrode slurry; the mixing tank further comprises a liquid outlet for outputting the electrode slurry. A buffer box is arranged in the mixing cavity; the inner end of the liquid inlet is connected with the box cavity of the buffer box; the buffer box is further provided with a liquid outlet; the liquid outlet is higher than the stirring element. The liquid outlet is aligned with the area of the mixing cavity surrounding the liquid outlet, and the flow direction of the liquid outlet is perpendicular to the flow direction of the liquid outlet.

2. The battery lithium extraction pre-processing device of claim 1, wherein, The buffer box is arranged in a ring shape; the liquid outlet is implemented as a plurality of liquid outlets which are uniformly arranged at the bottom of the buffer box.

3. The battery lithium extraction pre-processing device of claim 2, wherein, The device further comprises a gas distribution assembly; the gas distribution assembly comprises a gas cavity for supplying protective gas; the gas outlet of the gas cavity is communicated with the heating cavity; the gas outlet is located upstream of the feeding port in the feeding direction of the heating bin.

4. The battery lithium extraction pre-processing device of claim 2, wherein, The gas distribution assembly further comprises a blowing element; the blowing element is located upstream of the feeding port in the feeding direction of the heating bin.

5. The battery lithium extraction pre-processing device of claim 1, wherein, The gas outlet comprises a plurality of gas outlets which are uniformly arranged.

6. The battery lithium extraction pre-processing device of claim 5, wherein, The gas cavity is communicated with a gas container for supplying protective gas.

7. The battery lithium extraction pre-processing device of claim 5, wherein, The feeding port is provided with a guide part with an opening gradually reduced in the feeding direction; and / or, a cover body is movably connected to the top of the heating bin to open or close the feeding port.

8. The battery lithium extraction pre-processing device of claim 5, wherein, The application relates to a battery lithium extraction pre-processing device.

9. The battery lithium extraction pre-processing device of claim 1, wherein, The application relates to a battery lithium extraction pre-processing device.

10. A battery lithium extraction production device, characterized in that, ​ ​

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