Battery crushed material sorting system and sorting method

Abstract

The invention discloses a battery crushed material sorting system and method.The battery crushed material sorting system comprises a crushing pretreatment device, a first-stage ball-milling device, a first-stage screening device, a second-stage ball-milling device, a water shaking table and a material storage assembly, the feeding end of the first-stage ball-milling device communicates with the discharging end of the crushing pretreatment device, and the feeding end of the second-stage ball-milling device communicates with the discharging end of the water shaking table; the feeding end of the first-stage screening device is communicated with the discharging end of the first-stage ball milling device, the feeding end of the second-stage ball milling device is communicated with the discharging end of the first-stage screening device, the feeding end of the water shaking table is communicated with the discharging end of the second-stage ball milling device, and the material storage assembly comprises a first material storage tank and a second material storage tank; and the first storage tank and the second storage tank are communicated with the discharge end of the water shaking table. According to the invention, the problem that the copper foil and aluminum foil agglomerated materials cannot be effectively separated due to the fragmentation influence of thermal runaway on the structures of the cathode and anode of the battery cell, the pole piece, the diaphragm and the graphite can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery recycling, and in particular to a battery crushing material sorting system and a sorting method. Background Art

[0002] When recycling used lithium batteries, it is necessary to separate the copper and aluminum in the positive and negative electrode collectors produced after the used lithium batteries are crushed to achieve secondary resource utilization of copper and aluminum metals.

[0003] For example, the Chinese invention patent with publication number: CN118385136A, named: A copper-aluminum sorting system and its sorting process, the copper-aluminum sorting system includes a grinding mill, a cyclone separator, a round screen and a specific gravity machine, the specific gravity machine is arranged on the path of the round screen outputting the copper-aluminum mixed powder, the specific gravity machine includes a specific gravity box, a wind mechanism, a specific gravity mechanism and a driving part, the specific gravity mechanism is arranged on the top of the specific gravity box, the wind mechanism is arranged inside the specific gravity box, and the wind mechanism is located below the specific gravity mechanism, and the wind selection mechanism is located below the specific gravity mechanism, so that the copper-aluminum mixed powder located inside the specific gravity mechanism is balanced by vibration and wind pressure based on the density difference of copper powder and aluminum powder, so that the copper powder and aluminum powder in the copper-aluminum mixed powder move to the corresponding outlets respectively, thereby realizing the separation of copper powder and aluminum powder. Although the black powder, electrolyte and diaphragm are effectively removed after the above process, the copper foil and aluminum foil agglomerates caused by agglomeration, adhesion and strong mechanical force in the battery crushed material cannot be effectively separated.

[0004] Therefore, there is an urgent need for a battery crushed material sorting system and sorting method to solve the problem in the prior art that thermal runaway has a crushing effect on the structure of the anode and cathode, pole pieces, diaphragms, and graphite of the battery cell, resulting in the inability to effectively separate the copper foil and aluminum foil agglomerated materials. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a battery crushed material sorting system and sorting method to solve the technical problem in the prior art that thermal runaway has a crushing effect on the structure of the anode and cathode, pole pieces, diaphragms, and graphite of the battery cell, thereby resulting in the inability to effectively separate the copper foil and aluminum foil agglomerated materials.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a battery crushing material sorting system, comprising: Crushing pre-treatment device; A primary ball milling device, the feed end of which is connected to the discharge end of the crushing pretreatment device; A primary screening device, the feed end of which is connected to the discharge end of the primary ball mill; A secondary ball milling device, the feed end of which is connected to the discharge end of the primary screening device; A water shaking table, the feed end of which is connected to the discharge end of the secondary ball mill; and The material storage assembly comprises a first material storage tank and a second material storage tank, wherein the first material storage tank and the second material storage tank are both connected to the discharge end of the water shaking table.

[0007] In some embodiments, the battery crushing material sorting system also includes a secondary screening device, which is arranged between the secondary ball mill and the water shaking table, and the feed end of the secondary screening device is connected to the discharge end of the secondary ball mill, and the discharge end is connected to the feed end of the water shaking table.

[0008] In some embodiments, the battery crushing material sorting system also includes a filter press, which is arranged between the secondary screening device and the water shaking table, and the feed end of the filter press is connected to the discharge end of the secondary screening device, and the discharge end is connected to the feed end of the water shaking table.

[0009] In some embodiments, the storage assembly also includes a third storage tank, the interior of which is respectively connected to the discharge ends of the first ball mill, the first screening device, the second ball mill and the second screening device for collecting black powder.

[0010] In some embodiments, the storage assembly also includes a fourth storage tank, the interior of which is respectively connected to the discharge ends of the first ball mill, the first screening device, the second ball mill and the second screening device for collecting diaphragms.

[0011] In some embodiments, the battery crushing material sorting system also includes a pure water tank, the interior of which is connected to the interior of the first-level ball mill, the second-level ball mill and the water shaking table, and is used to supply pure water to the interior of the first-level ball mill, the second-level ball mill and the water shaking table.

[0012] In some embodiments, the liquid outlet of the filter press is connected to the interior of the primary ball milling device for recovering liquid.

[0013] In some embodiments, the battery crushing material sorting system also includes a centrifuge, which is arranged between the filter press and the third storage tank or the fourth storage tank, and the discharge end of the filter press is respectively connected to the interior of the third storage tank and the fourth storage tank through the centrifuge.

[0014] In some embodiments, the battery crushing material sorting system also includes a material tank, which is connected to the interior of the primary ball mill and the secondary ball mill, and is used to supply steel balls to the interior of the primary ball mill and the secondary ball mill, respectively.

[0015] In a second aspect, the present invention further provides a battery crushing material sorting method, using the battery crushing material sorting system as described in any one of the above, the specific steps are as follows: Pretreatment of cell crushed materials: The cells are discharged, roughly crushed, and pyrolyzed at low temperatures, and then finely crushed and sorted to obtain the cell crushed material current collector; First-stage ball milling: Add steel balls with a diameter of 2 to 5 cm to the first-stage ball milling device in advance, and then add pure water and battery cell crushing material collector in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; First-stage ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, the current collector and the black powder from top to bottom; Secondary ball milling: Add steel balls with a diameter of 0.5 to 3 cm to the secondary ball mill in advance, and then add pure water and the collector after primary screening in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; Secondary ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, current collector and black powder from top to bottom; Filter press: The fluid collector after secondary screening enters the filter press to remove moisture, and the separated water is recycled into the primary ball mill. Then the black powder and diaphragm at the discharge end of the filter press are sent to the centrifuge respectively to obtain black powder and diaphragm; Water shaker: The current collector material after the filter press enters the water shaker, and pure water is added in proportion to separate the copper powder, diaphragm and aluminum powder.

[0016] Compared with the prior art, the beneficial effects of the battery crushing material sorting system provided by the present invention include: the scrapped batteries are crushed and pre-treated to roughly separate the black powder, diaphragm and iron material, and the obtained current collector is sent to the primary ball mill, the primary screening device, the secondary ball mill and the water shaker in sequence. After two-stage ball milling and screening, the wet material is sent to the water shaker for sorting again, and the obtained product is stored in the first storage tank and the second storage tank. Compared with the prior art, a screening process is arranged between the two-stage ball mills so that the fragments of the battery cell are subjected to friction and grinding forces, thereby eliminating the adhesion between the active material, the diaphragm and the current collector, so that the current collector and the active material are separated, and then the vibration in the water shaker is used to generate eddy currents to make the current collector on the inner wall of the equipment move irregularly at high speed, and the specific gravity difference is used for rapid separation, so that the separated aluminum powder and copper powder are respectively stored in the first storage tank and the second storage tank. This can solve the problem in the prior art that thermal runaway has a crushing effect on the structure of the cathode and anode, pole piece, diaphragm and graphite of the battery cell, thereby resulting in the inability to effectively separate the copper foil and aluminum foil agglomerated materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of a battery crushing material analysis system provided in an embodiment of the present invention.

[0018] Description of reference numerals: Crushing pretreatment device 1; primary ball mill 2; primary screening device 3; secondary ball mill 4; water shaker 5; storage assembly 6; first storage tank 61; second storage tank 62; third storage tank 63; fourth storage tank 64; secondary screening device 7; filter press 8; pure water tank 9; centrifuge 10; material tank 11. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that thermal runaway has a crushing effect on the structures of the cathode and anode, pole pieces, diaphragms and graphite of the battery cell, thereby resulting in the inability to effectively separate the copper foil and aluminum foil agglomerated materials, the present invention provides a battery crushed material sorting system and sorting method, which can achieve this by arranging a screening between the two-stage ball mills so that the battery cell crushed material fragments are subjected to the forces of friction and grinding, thereby eliminating the adhesion between the active materials, diaphragms and current collectors, so that the current collectors and the active materials are separated, and then the vibration in the water shaker 5 generates eddy currents to make the current collectors on the inner wall of the equipment move irregularly at high speed, and the specific gravity difference is used for rapid separation, so that the separated aluminum powder and copper powder are respectively stored in the first storage tank 61 and the second storage tank 62.

[0021] It should be noted that the battery crushing material sorting system and sorting method described in the present invention are used for but not limited to the field of battery recycling technology. For the convenience of explanation, in the present invention, only the battery crushing material sorting system and sorting method applied to the field of battery recycling technology are used as an example for explanation. The principles of applying the battery crushing material sorting system and sorting method to other types of equipment are essentially the same as those applied to the field of battery recycling technology, and will not be elaborated here.

[0022] See also Figure 1 , Figure 1It is a structural schematic diagram of a battery crushing material sorting system and a sorting method in one embodiment of the present invention. The battery crushing material sorting system includes: a crushing pretreatment device 1, a primary ball mill 2, a primary screening device 3, a secondary ball mill 4, a water shaking table 5 and a storage assembly 6. The feed end of the primary ball mill 2 is connected to the discharge end of the crushing pretreatment device 1, the feed end of the primary screening device 3 is connected to the discharge end of the primary ball mill 2, the feed end of the secondary ball mill 4 is connected to the discharge end of the primary screening device 3, the feed end of the water shaking table 5 is connected to the discharge end of the secondary ball mill 4, and the storage assembly 6 includes a first storage tank 61 and a second storage tank 62, and the first storage tank 61 and the second storage tank 62 are both connected to the discharge end of the water shaking table 5.

[0023] In this system, the scrapped batteries are crushed and pre-treated by the crushing device 1, which can roughly separate the black powder, diaphragm and iron material, and the obtained current collector is sent to the primary ball mill 2, the primary screening device 3, the secondary ball mill 4 and the water shaker 5 in sequence. After two stages of ball milling and screening, the wet material is sent to the water shaker 5 for sorting again, and the obtained products are stored in the first storage tank 61 and the second storage tank 62.

[0024] Compared with the prior art, by arranging screening between the two-stage ball mills, the broken fragments of the battery cell are subjected to the forces of friction and grinding, thereby eliminating the adhesion between the active material, the diaphragm and the current collector, so that the current collector and the active material are separated, and then the vibration in the water shaker 5 is used to generate eddy currents to make the current collector on the inner wall of the equipment move irregularly at high speed, and the specific gravity difference is used for rapid separation, so that the separated aluminum powder and copper powder are respectively stored in the first storage tank 61 and the second storage tank 62, which can solve the problem in the prior art that thermal runaway has a crushing effect on the structure of the cathode and anode, pole piece, diaphragm and graphite of the battery cell, thereby resulting in the inability to effectively separate the copper foil and aluminum foil agglomerated materials.

[0025] Furthermore, the crushing pretreatment device 1 here is a common and easy-to-purchase equipment on the market. After the battery cells are discharged-coarsely crushed-low-temperature pyrolysis, they are further subjected to a short process of fine crushing-sorting to remove more than 90% of the diaphragm, black powder and all iron materials. At the same time, the structure of the battery cell components is dissociated to facilitate subsequent fine sorting. The battery cell crushed material fragments obtained after pre-crushing mainly include positive and negative electrode sheets that have not been effectively separated. The crushing pretreatment device 1, the first-level ball mill 2, the second-level ball mill 4, and the water shaking table 5 here are all conventional settings well known to those skilled in the art, and will not be elaborated here.

[0026] Furthermore, the front-end process is a wet method, so a water shaking table 5 is introduced for sorting. Here, the water shaking table 5 uses vibration to generate eddy currents, which make the collector on the inner wall of the equipment move irregularly at high speed, and use the difference in specific gravity for rapid separation. At the same time, the eddy current drives the movement of water molecules to achieve a vibration effect, which will not be elaborated here.

[0027] In this embodiment, Figure 1 As shown, the battery crushing material sorting system also includes a secondary screening device 7, a filter press 8, a pure water tank 9, a centrifuge 10 and a material tank 11, and the storage component 6 also includes a third storage tank 63 and a fourth storage tank 64.

[0028] The interior of the third storage tank 63 or the fourth storage tank 64 is respectively connected to the discharge ends of the primary ball mill 2, the primary screening device 3, the secondary ball mill 4 and the secondary screening device 7 for collecting black powder or diaphragm.

[0029] The third storage tank 63 or the fourth storage tank 64 is used to store the black powder or the diaphragm separated from the current collector by the primary ball mill 2, the primary screening device 3, the secondary ball mill 4 and the secondary screening device 7 in sequence.

[0030] In one embodiment, see Figure 1 The secondary screening device 7 is arranged between the secondary ball mill 4 and the water shaking table 5 , the feed end of the secondary screening device 7 is connected to the discharge end of the secondary ball mill 4 , and the discharge end thereof is connected to the feed end of the water shaking table 5 .

[0031] After the secondary ball milling, the current collector is sent to the secondary screening device 7 again, and after the secondary screening, the diaphragm, the current collector and the black powder are separated in sequence.

[0032] Furthermore, the primary screening device 3 and the secondary screening device 7 here both adopt vibration screening and intermittent ultrasonic screening, which can accelerate the separation of materials. The primary screening device 3 and the secondary screening device 7 here belong to conventional settings well known to technical personnel in this field and will not be elaborated here.

[0033] In one embodiment, see Figure 1 The filter press 8 is arranged between the secondary screening device 7 and the water shaking table 5 , the feed end of the filter press 8 is connected to the discharge end of the secondary screening device 7 , and the discharge end is connected to the feed end of the water shaking table 5 .

[0034] After the current collector enters the filter press 8, moisture is removed, and the diaphragm, the current collector and the black powder are separated in sequence.

[0035] Furthermore, the filter press 8 here is a common and easily purchased device on the market, which belongs to a conventional setting well known to those skilled in the art and will not be described in detail here.

[0036] In one embodiment, see Figure 1 The interior of the pure water tank 9 is connected to the interior of the primary ball mill 2, the secondary ball mill 4 and the water shaking table 5, and is used to supply pure water to the interior of the primary ball mill 2, the secondary ball mill 4 and the water shaking table 5.

[0037] The pure water tank 9 is used to provide a certain proportion of pure water to the primary ball mill 2, the secondary ball mill 4 and the water shaker 5 respectively, so as to meet the equipment requirements during separation or sorting.

[0038] In one embodiment, see Figure 1 The liquid outlet of the filter press 8 is connected to the interior of the first-stage ball mill 2 for recovering liquid.

[0039] The liquid separated by the filter press 8 can be sorted again by the primary ball mill 2, the primary screening device 3, the secondary ball mill 4 and the secondary screening device 7, and the water shaking table 5, thereby improving the sorting efficiency and reducing the production cost.

[0040] In one embodiment, see Figure 1 The centrifuge 10 is disposed between the filter press 8 and the third storage tank 63 or the fourth storage tank 64 , and the discharge end of the filter press 8 is connected to the interior of the third storage tank 63 and the fourth storage tank 64 through the centrifuge 10 .

[0041] The centrifuge 10 is disposed between the filter press 8 and the third storage tank 63 or the fourth storage tank 64, and can centrifuge the material sorted out by the filter press to obtain black powder and a diaphragm.

[0042] Furthermore, the centrifuge 10 here is a small centrifugal device that is common and easy to purchase on the market, and belongs to a conventional setting well known to those skilled in the art, and will not be described in detail here.

[0043] In one embodiment, see Figure 1 The material tank 11 is connected to the interior of the primary ball mill 2 and the secondary ball mill 4, and is used to supply steel balls to the interior of the primary ball mill 2 and the secondary ball mill 4 respectively.

[0044] The material tank 11 is used to store the steel balls required for the primary ball mill and the secondary ball mill. The diameter of the steel balls required for the primary ball mill is 2 to 5 cm, the ball-to-material ratio is 1:1 to 5:1, and they fill the inner cavity; the diameter of the steel balls required for the secondary ball mill is 0.5 to 3 cm, the ball-to-material ratio is 1:1 to 5:1, and they fill the inner cavity.

[0045] The present invention also provides a battery crushing material sorting method, using the above battery crushing material sorting system, the specific steps are as follows: Pretreatment of cell crushed materials: The cells are discharged, roughly crushed, and pyrolyzed at low temperatures, and then finely crushed and sorted to obtain the cell crushed material current collector; First-stage ball milling: Add steel balls with a diameter of 2 to 5 cm to the first-stage ball milling device 2 in advance, and then add pure water and battery cell crushing material collector in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; First-stage ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, the current collector and the black powder from top to bottom; Secondary ball milling: Add steel balls with a diameter of 0.5 to 3 cm to the secondary ball mill 4 in advance, and then add pure water and the current collector after primary screening in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; Secondary ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, current collector and black powder from top to bottom; Filter press 8: The fluid collector after secondary screening enters the filter press 8 to remove moisture, and the separated water is recovered into the primary ball mill 2, and then the black powder and diaphragm at the discharge end of the filter press 8 are respectively sent to the centrifuge 10 to obtain the black powder and diaphragm; Water shaker 5: The current collector material after the filter press 8 enters the water shaker 5, and pure water is added in proportion to separate the copper powder, the diaphragm and the aluminum powder.

[0046] In order to better understand the present invention, the following Figure 1 The technical solution of the present invention is described in detail: After the scrapped battery is crushed and pre-treated by the crushing device 1, the black powder, the diaphragm and the iron material can be roughly separated, and the obtained current collector is sent to the primary ball mill 2, the primary screening device 3, the secondary ball mill 4 and the water shaker 5 in sequence. After two-stage ball milling and screening, the wet material is sent to the water shaker 5 for sorting again, and the obtained product is stored in the first storage tank 61 and the second storage tank 62. Compared with the prior art, by setting screening between the two-stage ball mills, the fragments of the battery core crushed material are subjected to friction and grinding forces, eliminating the adhesion between the active material, the diaphragm and the current collector, so that the current collector and the active material are separated, and then the vibration in the water shaker 5 is used to generate eddy currents to make the current collector on the inner wall of the equipment move irregularly at high speed, and the specific gravity difference is used for rapid separation, so that the separated aluminum powder and copper powder are stored in the first storage tank 61 and the second storage tank 62 respectively.

[0047] The specific workflow of the present invention includes the following steps: Pretreatment of battery cell crushed materials: After the battery cells are discharged, roughly crushed, and pyrolyzed at low temperature, they undergo a short process of fine crushing and sorting to remove more than 90% of the diaphragms, black powder, and all iron materials. At the same time, the structure of the battery cell components is dissociated to facilitate subsequent fine sorting, and the battery cell crushed material fragments are obtained, mainly including the positive and negative electrode sheets that have not been effectively separated, which enter the battery cell crushed material fragment wet separation collector process.

[0048] First-stage ball milling: load steel balls in advance, with a ball-to-material ratio of 1:1 to 5:1 and a ball diameter of 2 to 5 cm. Add pure water to fill the inner cavity, and evenly put in the battery cell crushed material fragments after pyrolysis and harmless treatment. During the operation of the ball mill, the battery cell crushed material fragments are subjected to friction and grinding forces, which eliminates the adhesion between the active material, diaphragm and current collector, so that the current collector and active material are separated, and part of the diaphragm is separated at the same time.

[0049] Primary ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasound is started intermittently to accelerate the separation of the materials. The screen can be replaced to separate the diaphragm, current collector and black powder from top to bottom. The current collector enters the next process with a purity of more than 90%, and the rest is mixed black powder and diaphragm.

[0050] Secondary ball milling: load steel balls in advance, with a ball-to-material ratio of 1:1 to 5:1, and a ball diameter of 0.5 to 3 cm. Add pure water to fill the inner cavity, and evenly put in the current collector. During the operation of the ball mill, the current collector is subjected to friction and grinding due to its inherent ductility, but its size does not change significantly, and the black powder and diaphragm are further separated, while the copper foil and aluminum foil are completely separated.

[0051] Secondary ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasound is started intermittently to accelerate the separation of the materials. The screen can be replaced, and the diaphragm, current collector and black powder are separated from top to bottom. The current collector enters the next process with a purity of more than 98%. The rest is mixed with diaphragm. The specific gravity of diaphragm is closer to that of aluminum powder, while the specific gravity of copper powder is higher than that of aluminum powder. At the same time, the value of copper is much higher than that of aluminum.

[0052] Filter press 8: The fluid collector enters the filter press 8 to remove moisture, and the water is recycled to the primary ball mill. The black powder and diaphragm enter the small centrifuge 10 respectively.

[0053] Water shaker 5: The current collector material enters the water shaker 5, and pure water is added in proportion. The vibration is used to generate eddy currents, which make the current collector on the inner wall of the equipment move irregularly at high speed. The specific gravity difference is used for rapid separation. At the same time, the eddy current drives the movement of water molecules to achieve a vibration effect. The water shaker 5 is mainly used to separate copper powder, and the diaphragm is mixed with aluminum powder. The purity of copper powder can reach 97%.

[0054] The present invention, through the above-mentioned system, can solve the problem in the prior art that thermal runaway has a crushing effect on the structures of the anode and cathode, pole pieces, diaphragms and graphite of the battery cell, thereby resulting in the inability to effectively separate the agglomerated materials of copper foil and aluminum foil.

[0055] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery crushing material sorting system, characterized in that: include: Crushing pre-treatment device; A primary ball milling device, the feed end of which is connected to the discharge end of the crushing pretreatment device; A primary screening device, whose feeding end is connected to the discharging end of the primary ball milling device; A secondary ball milling device, the feed end of which is connected to the discharge end of the primary screening device; A water shaker, the feed end of which is connected to the discharge end of the secondary ball mill; and The material storage assembly comprises a first material storage tank and a second material storage tank, wherein the first material storage tank and the second material storage tank are both connected to the discharge end of the water shaking table.

2. The battery crushing material sorting system according to claim 1 is characterized in that: It also includes a secondary screening device, which is arranged between the secondary ball mill and the water shaking table. The feed end of the secondary screening device is connected to the discharge end of the secondary ball mill, and the discharge end is connected to the feed end of the water shaking table.

3. The battery crushing material sorting system according to claim 2 is characterized in that: It also includes a filter press, which is arranged between the secondary screening device and the water shaking table. The feed end of the filter press is connected to the discharge end of the secondary screening device, and the discharge end is connected to the feed end of the water shaking table.

4. The battery crushing material sorting system according to claim 3 is characterized in that: The storage assembly also includes a third storage tank, the interior of which is respectively connected to the discharge ends of the primary ball mill, the primary screening device, the secondary ball mill and the secondary screening device for collecting black powder.

5. The battery crushing material sorting system according to claim 4, characterized in that: The storage assembly also includes a fourth storage tank, the interior of which is respectively connected to the discharge ends of the primary ball mill, the primary screening device, the secondary ball mill and the secondary screening device for collecting diaphragms.

6. The battery crushing material sorting system according to claim 5, characterized in that: It also includes a pure water tank, the interior of which is connected to the interior of the primary ball mill, the secondary ball mill and the water shaking table, and is used to supply pure water to the interior of the primary ball mill, the secondary ball mill and the water shaking table.

7. The battery crushing material sorting system according to claim 5, characterized in that: The liquid outlet end of the filter press is connected to the interior of the primary ball mill device for recovering liquid.

8. The battery crushing material sorting system according to claim 7, characterized in that: It also includes a centrifuge, which is arranged between the filter press and the third storage tank or the fourth storage tank, and the discharge end of the filter press is connected to the inside of the third storage tank and the fourth storage tank respectively through the centrifuge.

9. The battery crushing material sorting system according to claim 1, characterized in that: It also includes a material tank, which is connected to the interior of the primary ball mill and the secondary ball mill, and is used to supply steel balls to the interior of the primary ball mill and the secondary ball mill respectively.

10. A method for sorting battery crushed materials, characterized in that: Using the battery crushing material sorting system as described in any one of claims 1 to 9, the specific steps are as follows: Pretreatment of cell crushed materials: The cells are discharged, roughly crushed, and pyrolyzed at low temperatures, and then finely crushed and sorted to obtain the cell crushed material current collector; First-stage ball milling: Add steel balls with a diameter of 2 to 5 cm to the first-stage ball milling device in advance, and then add pure water and battery cell crushing material collector in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; First-stage ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, the current collector and the black powder from top to bottom; Secondary ball milling: Add steel balls with a diameter of 0.5 to 3 cm to the secondary ball mill in advance, and then add pure water and the collector after primary screening in sequence, with a ball-to-material ratio of 1:1 to 5:1, and fill the inner cavity; Secondary ultrasonic screening: The material enters the inner cavity of the equipment, vibrates and screens, and ultrasonic waves are intermittently activated to accelerate the separation of the materials, separating the diaphragm, current collector and black powder from top to bottom; Filter press: The fluid collector after secondary screening enters the filter press to remove moisture, and the separated water is recycled into the primary ball mill. Then the black powder and diaphragm at the discharge end of the filter press are sent to the centrifuge respectively to obtain black powder and diaphragm; Water shaker: The current collector material after the filter press enters the water shaker, and pure water is added in proportion to separate the copper powder, diaphragm and aluminum powder.

Images