CN116273879A - Broken winnowing system of lithium cell - Google Patents

Abstract

The invention discloses a lithium battery crushing and winnowing system, including: a crushing module, used to input lithium batteries, and output fragments and powder; a screen sorting device, used to receive fragments and powder, and pass through the second sieve The net separates debris and powder; the winnowing device is used to receive debris and change the settling velocity of low-density and high-density materials through the buoyancy of the airflow. Among them, the density of copper foil and aluminum foil is relatively high, while lithium battery casings, diaphragms, The lower density of plastic allows the separation of the two. The lithium battery crushing and screening system crushes lithium batteries into fragments and powders through the crushing module, and then separates the powders and fragments through a screen sorting device, and further sorts the fragments into metal fragments and non-metal fragments, thereby obtaining lithium iron phosphate The powder and the aluminum foil and copper foil bonded with lithium iron phosphate fully recover the lithium metal resources contained in the lithium battery.

Description

A crushing winnowing system for lithium battery

technical field

The invention relates to the field of lithium battery crushing and screening, in particular to a lithium battery crushing and winnowing system.

Background technique

Lithium battery cathode materials include rare metals such as lithium, nickel, manganese, and cobalt. Lithium mines are scarce in my country. Recycling rare and precious metals in waste lithium batteries is an effective way to alleviate the scarcity of mine resources in my country.

At present, the methods of recycling waste lithium batteries generally include physical methods, chemical methods and biological methods. Pretreatment is required before treatment, and physical operations such as mechanical crushing, screening, magnetic separation and sorting are performed to facilitate subsequent advanced treatment and separate the positive electrode. The material attached to the sheet.

After the lithium battery is broken, part of the lithium iron phosphate powder and graphite powder fall off, and the other part of the lithium iron phosphate powder and graphite powder are still bonded to the aluminum foil and copper foil. In order to fully recover lithium metal, it is necessary to collect the lithium iron phosphate powder at the same time And the lithium iron phosphate bonded on the aluminum foil and copper foil, for this reason, just need to improve the physical crushing device of existing lithium battery, so that it can collect lithium iron phosphate powder, aluminum foil and copper foil.

Contents of the invention

The object of the present invention is to provide a lithium battery crushing winnowing system to solve the technical problem of how to fully collect lithium iron phosphate during the lithium battery crushing process.

In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

A crushing and winnowing system for lithium batteries, comprising: a crushing module for inputting lithium batteries and outputting fragments and powders; a screen sorting device for receiving fragments and powders and separating the fragments and powders through a second screen Wind separation device, used to receive fragments, and separate metal fragments and non-metal fragments by air flow; Wherein, the wind separation device includes: feeding channel, connected to the output end of the screen sorting device, and used for throwing Chips; there are two discharge channels, and they are arranged side by side obliquely below the feed channel along the throwing direction of the chips; an airflow generator is arranged between the feed channel and the discharge channel, And the airflow is output to the transmission path of the fragments to change the settling velocity of the metal fragments and non-metal fragments, so that the metal fragments and non-metal fragments fall into different said discharge channels respectively; Above the discharge channel, and on the flow path of the airflow output by the airflow generator, the airflow output by the airflow generator is sprayed on the column surface of the split column to bypass the top of the split column and below and flow to the two outlet channels respectively.

Further, the winnowing device includes a shroud arranged on the outside of the inlet passage, the splitter column and the outlet passage, and the shroud is at least away from the inlet passage. One side of the discharge channel extends to a side of the discharge channel away from the feed channel.

Further, the splitter column includes: a first mandrel horizontally placed above the two discharge channels and located on the flow path of the airflow output by the airflow generator; a roller sleeved on the first The outside of a mandrel and is capable of rolling.

Further, the air flow generator includes: a blower; a spray head, hinged to the frame, and connected to the output end of the blower through a pipeline, and the spray head is used to form an upward flow between the feed channel and the splitter column. Or a uniform airflow that flows upward obliquely; a driver that connects the nozzle and the frame, and the driver is used to drive the nozzle to rotate so as to change the pitch angle of the nozzle.

As another aspect of the present invention, the splitter column includes: a second mandrel, placed horizontally above the two discharge channels, and located on the flow path of the airflow output by the airflow generator; A detector is connected to the second mandrel and located above the second mandrel, and the frame-type metal detector is used to send a signal when metal fragments pass through.

Further, the second mandrel is rotatably connected to the frame around its own axis, the second mandrel is connected with a torque sensor, and the torque sensor is used to detect the torque received by the second mandrel; the frame A type metal detector is fitted with a third screen covering its frame, the third screen having meshes through which debris can pass.

Further, the frame-type metal detector has a plurality and is evenly distributed around the axis of the second mandrel, wherein the frame-type metal detector moving above the second mandrel is powered on.

Optionally, the crushing module includes:

The roller crusher is used to crush the lithium battery through the staggered crushing teeth; the hammer crusher is connected to the output end of the roller crusher and is used to crush the lithium battery through the crushing hammer; the first screen is set on the The lowest part inside the hammer crusher and close to the crushing hammer, the fragments larger than the mesh of the first screen are carried away from the first screen by the rotating crushing hammer and continue to be crushed, smaller than the mesh of the first screen Fragments of the meshes of a sieve move through the first sieve to the sieve sorting device.

Further, the roller crusher includes a first cabinet, a driving roller and a driven roller, the driving roller and the driven roller are parallel to each other and are rotationally connected with the first cabinet, the driving The rollers and the driven rollers are driven by a motor to rotate in opposite directions, the crushing teeth are formed on each roller, and the adjacent crushing teeth are interlaced with each other when rotating to crush the lithium battery; the hammer type The crusher includes a second casing and a roller, the roller is rotatably connected to the second casing and driven to rotate by a motor, the breaker has multiple and fixedly connected to the roller, the second casing A crushing wall corresponding to the crushing hammer is formed on the inner wall, and the lithium battery is crushed when the roller crosses the crushing wall.

Further, the screen sorting device includes a third cabinet and a vibration motor that drives the vibration of the third cabinet, the third cabinet is connected to the frame through an elastic member, and the second screen is placed horizontally on the The inside of the third cabinet and divide the third cabinet into an upper layer and a lower layer, the debris and powder fall on the second screen and stay on the upper layer and the lower layer respectively, and all the particles located in the upper layer The debris moves towards the winnowing device under the vibration of the vibrating motor.

Compared with the prior art, the present application has the following beneficial effects:

Provides a lithium battery crushing and air separation system, which crushes lithium batteries into fragments and powders through a crushing module, and then separates the powders and fragments through a screen sorting device, and further sorts the fragments into metal fragments and non-metal fragments , so as to obtain lithium iron phosphate powder and aluminum foil and copper foil bonded with lithium iron phosphate, and fully recover the lithium metal resources contained in the lithium battery.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

Fig. 1 is the flowchart of embodiment 1 of the present invention;

Fig. 2 is the side view of any one winnowing device in the embodiment of the present invention 1-4;

Fig. 3 is the perspective view of any one winnowing device in the embodiment of the present invention 1-4;

Fig. 4 is the mechanical sketch map of the working state of any one winnowing device in the embodiment of the present invention 1-4;

Fig. 5 is the mechanical diagram of the operating state of the winnowing device of embodiment 5 of the present invention;

Fig. 6 is the axial view of the splitter column of embodiment 6 or 7 of the present invention;

Fig. 7 is the assembly diagram of the splitter column of embodiment 6 or 7 of the present invention;

Fig. 8 is a partially enlarged view at A of Fig. 7;

Figure 9 is a perspective view of Embodiment 1 of the present invention;

Fig. 10 is a perspective view of a conveyor according to Embodiment 1 of the present invention;

Fig. 11 is a perspective view of the internal structure of the roller crusher according to Embodiment 1 of the present invention;

Fig. 12 is a perspective view of the internal structure of the hammer crusher according to Embodiment 1 of the present invention;

13 is a perspective view of a screen sorting device according to Embodiment 1 of the present invention;

14 is a perspective view of the internal structure of the screen sorting device of Embodiment 1 of the present invention;

The labels in the figure are respectively indicated as follows:

1 - Rack;

2-roller crusher; 21-first chassis; 22-crushing gear; 23-driving roller; 24-driven roller; 25-driving gear; 26-driven gear; 27-chain transmission mechanism; 28- first motor;

3-hammer crusher; 31-second chassis; 32-breaking hammer; 33-roller; 34-broken wall; 35-belt transmission mechanism; 36-second motor;

4 - the first screen;

5 - conveyor;

6-screen sorting device; 61-second screen; 62-third chassis; 63-chassis cover; 64-vibration motor; 65-elastic parts;

7-wind separation device; 71-feed channel; 72-discharge channel; 73-airflow generator; 731-fan; 732-nozzle; 733-pipeline; 734-telescopic rod; Mandrel; 742-roller; 743-second mandrel; 744-frame metal detector; 745-torque sensor; 746-third screen; 747-track chute; ; 75 - Shroud.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Fully discharge the waste lithium batteries, and then crush and sort them by the following device.

As shown in Figures 1 and 2, a crushing winnowing system for lithium batteries is provided to solve the above technical problems.

Example 1:

include:

The crushing module is used to input lithium batteries and output fragments and powder; among them, fragments include lithium battery shells, diaphragms, plastics, copper foil, aluminum foil, and powders include aluminum foil, lithium iron phosphate powder and graphite powder that fall off from copper foil;

The screen sorting device 6 is used to receive debris and powder, and separate the debris and powder by the second screen 61; wherein, the particle diameter of the powder is smaller than the particle diameter of the fragment, the powder will pass through the second screen 61, and the fragment will Stay in the second screen cloth 61, thereby realize the separation of the two;

Wind separation device 7 is used to receive fragments and separate metal fragments and non-metal fragments through air flow; the working principle of wind separation device 7 is to change the settling velocity of low-density and high-density materials through the buoyancy of air flow, wherein copper foil, The density of aluminum foil is high, while the density of lithium battery case, diaphragm and plastic is low, so as to realize the separation of the two.

Wherein, winnowing device 7 comprises:

Feed channel 71 is connected to the output end of screen sorting device 6, and is used for throwing debris;

There are two discharge passages 72, and they are arranged side by side obliquely below the feed passage 71 along the throwing direction of the fragments;

The air flow generator 73 is arranged between the feed channel 71 and the discharge channel 72, and outputs the air flow to the transmission path of the fragments, so as to change the settling velocity of the metal fragments and non-metal fragments, so that the metal fragments and non-metal fragments fall into the In different discharge channels 72;

The splitter column 74 is placed horizontally above the two discharge passages 72, and is positioned on the flow path of the airflow output by the airflow generator 73, and the airflow output by the airflow generator 73 is sprayed on the cylindrical surface of the splitter column 74 to circumvent The excess flow column 74 is above and below and flows to the two discharge channels 72 respectively.

After the lithium battery is crushed and separated into casing, separator, plastic, copper foil, aluminum foil, lithium iron phosphate powder and graphite powder, the aluminum foil and copper foil are subjected to the next step of depowdering, and the powder that comes off is passed through the screen sorting device 6 The separated powders are mixed and then subjected to further advanced treatment to extract rare metals.

further:

Because a part of shells, diaphragms and plastics with smaller particle diameters are easy to fly to the outside of the discharge channel 72 .

For this reason, on the basis of embodiment 1, embodiment 2 is provided.

The winnowing device 7 comprises a shroud 75 that is arranged on the outside of the feed passage 71, the split column 74 and the discharge passage 72, and the shroud 75 extends at least from the side of the feed passage 71 away from the discharge passage 72 to the outlet. The feed channel 72 is away from the side of the feed channel 71 .

The purpose of the shroud 75 is to guide the airflow above the splitter column 74 to turn downwards to flow to the discharge channel 72, so as to prevent the shells, diaphragms and plastics with low density from flying to the outside of the discharge channel 72.

further:

Since a part of the copper foil and aluminum foil will hit the surface of the splitter column 74, the surface of the splitter column 74 will be bumpy over time, and the impact of the airflow on the surface of the splitter column 74 will cause backflow due to these depressions, causing the airflow to form on the surface of the splitter column 74. Turbulence, which affects the separation of debris.

For this reason, on the basis of embodiment 1 or 2, embodiment 3 is provided.

As shown in Figures 2, 3, and 4, the splitter column 74 includes:

The first mandrel is placed horizontally above the two discharge channels 72, and is located on the flow path of the air flow output by the air flow generator 73;

The roller is set on the outside of the first mandrel and can roll.

The usefulness of the drum is to bear the impact of debris evenly. The shell, diaphragm and plastic with less density fall into a discharge channel 72 over the top of the drum, while the copper foil and aluminum foil with higher density fall into the discharge channel 72 from the bottom of the drum. In the other discharge channel 72, during this period, a part of copper foil and aluminum foil will hit the drum, and the drum will be rotated by the impact, so that the side of the drum that is not hit by the impact turns to the output end of the airflow generator 73, thereby making the drum All parts of the surface of the surface are subjected to uniform impact, so as to improve the service life of the splitter column 74.

on the other hand:

The winnowing efficiency of the winnowing device 7 is affected by various factors, for example: 1. The executive part of the crushing module used to crush the lithium battery will gradually wear out during use, resulting in larger fragments, which in turn cause the fragments to pass through winnowing After that, more metal fragments are mixed in the non-metal fragments; two, the fluctuation of the local power supply voltage is relatively large, and the speed of the airflow output by the airflow generator 73 is unstable, causing more metal fragments to be mixed into the non-metal fragments, or more non-metal fragments mixed into metal fragments.

For this reason, on the basis of any one of Embodiments 1-3, Embodiment 4 is provided.

As shown in Figures 2 and 3, the air flow generator 73 includes:

fan 731;

The nozzle 732 is hinged with the frame 1, and is connected to the output end of the fan 731 through a pipeline 733. The nozzle 732 is used to form an upward or oblique upwardly flowing uniform air flow between the feed channel 71 and the splitter column 74;

The driver is connected to the spray head 732 and the frame 1, and the driver is used to drive the spray head 732 to rotate to change the pitch angle of the spray head 732.

The shape of the output end of the spray head 732 can be selected according to needs, such as circular, square, flat and long, etc.

The driver can be an electric or manual telescopic rod 734. As shown in Figures 2 and 3, the output end of the nozzle 732 is hinged to the frame 1, and the position of the nozzle 732 away from its output end is hinged to the frame 1 through the telescopic rod 734. The driver also Can be an electric turntable.

By observing the mixing of metal fragments and non-metal fragments in the two discharge channels 72, the staff selectively extends or shortens the telescopic rod 734, so that the nozzle 732 is lifted or drooped, thereby changing the angle of the airflow, and then Changing the effect of the airflow on the debris makes it easier for non-metallic debris to pass over the splitter post 74 or vice versa.

further:

The workers have already lagged behind by observing the mixing of metal fragments and non-metal fragments in the two discharge channels 72, and cannot immediately adjust the pitch angle of the nozzle 732 to correct the separation of metal fragments and non-metal fragments in a timely manner. Condition.

For this reason, on the basis of embodiment 1, 2 or 4, embodiment 5 is provided.

As shown in Figure 5, the splitter column 74 includes:

The second mandrel 743 is placed horizontally above the two discharge channels 72, and is located on the flow path of the airflow output by the airflow generator 73;

A frame-type metal detector 744 is connected to the second mandrel 743 and located above the second mandrel 743 , and the frame-type metal detector 744 is used to send out a signal when metal fragments pass through.

When metal fragments cross the top of the splitter column 74, the frame metal detector 744 above the second mandrel 743 sends a signal, and the controller sends a signal to the driver after receiving the signal, and the driver adjusts the elevation angle of the shower head 732 to make it descend to Reduce metal fragments flying over the shunt post 74 .

further:

The technical solution of Embodiment 5 can only detect the situation that the elevation angle of the nozzle 732 is too high, but cannot detect the situation that the elevation angle of the nozzle 732 is too low.

For this reason, on the basis of embodiment 5, embodiment 6 is provided.

As shown in Figures 6, 7, and 8, the second mandrel 743 is connected to the frame 1 through a bearing that can rotate around its own axis. The second mandrel 743 is connected with a torque sensor 745, and the torque sensor 745 is used to detect the second mandrel 743. Torque to withstand;

A third screen 746 covering the frame of the frame metal detector 744 is installed, and the third screen 746 has meshes through which debris can pass.

Most of the non-metallic fragments pass through the frame metal detector 744 through the mesh of the third screen 746, and a small amount of non-metallic fragments hit the third screen 746, and then deflected under the action of the wind to pass through the mesh, non-metallic The impact of the fragments on the third screen 746 makes the second mandrel 743 bear a counterclockwise rotating torque, and the torque sensor 745 judges the amount of non-metallic fragments passing through the frame metal detector 744 through the torque.

If the torque that the second mandrel 743 bears is small, and the frame-type metal detector 744 does not detect that metal fragments pass through, it means that some non-metal fragments are mixed in the metal fragments. At this time, the controller sends a signal to the driver, and the driver Adjust the elevation angle of the spray head 732 to make it lift up, so as to reduce the non-metallic fragments passing under the splitter column 74 .

further:

The second mandrel 743, the frame metal detector 744 and the third screen 746 are prone to dents due to the long-term impact of debris, which reduces the service life and easily causes turbulent flow of the airflow, which affects the separation of debris.

Therefore, on the basis of embodiment 6, embodiment 7 is provided.

As shown in FIGS. 6 , 7 , and 8 , there are multiple frame-type metal detectors 744 that are evenly distributed around the axis of the second mandrel 743 , wherein the frame-type metal detectors 744 that move above the second mandrel 743 are energized.

Specifically, a 1/4 ring-shaped power supply fan ring is installed on the frame 1, and the frame metal detector 744 is connected or separated from the power supply fan ring through a brush. When the frame metal detector 744 moves to When the second mandrel 743 is above, the brush is in contact with the power supply fan ring, the frame metal detector 744 is energized and sends a signal to the controller, otherwise the frame metal detector 744 is powered off and does not work.

Optional:

The second mandrel 743 is an aluminum alloy strip, and a plurality of track slide grooves 747 are formed around its axis, and a corresponding track slide bar 748 is formed on the frame metal detector 744. The track slide grooves 747 and the track slide bars 748 are both T-shaped, the two ends of the second mandrel 743 are connected to the frame 1 through a stepped shaft 749 with a T-shaped plug.

on the other hand:

On the basis of any one of the above embodiments, an optional structure of the crushing and screening system for lithium batteries is provided.

As shown in Figure 9, the crushing module includes:

Roller crusher 2 for crushing lithium batteries through staggered crushing teeth 22;

The hammer crusher 3 is connected to the output end of the roller crusher 2, and is used to crush the lithium battery through the crushing hammer 32;

The first screen 4 is arranged at the lowest point inside the hammer crusher 3 and is close to the crushing hammer 32. Fragments larger than the mesh of the first screen 4 are taken away from the first screen 4 by the rotating crushing hammer 32 and continue to be crushed. Fragments smaller than the mesh of the first sieve 4 move through the first sieve 4 to the sieve sorting device 6 .

An inlet is provided above the roller crusher 2, and an outlet is provided below the roller crusher 2 and connected to the inlet of the hammer crusher 3 for secondary crushing of lithium battery fragments.

As shown in Figure 10, a conveyor 5 is installed at the bottom of the first screen 4, the conveyor 5 is a chain plate conveyor, and the conveyor 5 is used to transport materials from a low place to a high place, that is, from the hammer crusher 3 The bottom is transported to the top of the screen sorting device 6.

Optionally:

The roller crusher 2 includes a first chassis 21 and 2 rollers, the 2 rollers are parallel to each other and connected in rotation with the first chassis 21, the 2 rollers are driven by a motor to rotate in opposite directions, and the crushing teeth 22 are formed on each On the roller, adjacent crushing teeth 22 are interlaced with each other to crush the lithium battery when rotating.

specific:

As shown in Figure 11, the roller crusher 2 includes a first chassis 21, crushing teeth 22, driving roller 23, driven roller 24, driving gear 25 and driven gear 26, and the number of crushing teeth 22 is 18, the size Same, be installed on driving roller 23 and driven roller 24 side by side respectively, one end of driving roller 23 and driven roller 24 is respectively coaxially provided with driving gear 25 and driven gear 26, and driving gear 25 and driven The gears 26 are meshed, and the driving gear 25 and the driven gear 26 rotate in the opposite direction and have the same number of teeth. One end of the driving roller 23 is in drive connection with the first motor 28 through the chain transmission mechanism 27 .

Optionally:

The hammer crusher 3 includes a second casing 31 and a roller, the roller is rotatably connected to the second casing 31 and driven to rotate by a motor, the breaking hammer 32 has a plurality of rollers 33 that are fixedly connected, and the second casing 31 A crushing wall 34 corresponding to the crushing hammer 32 is formed on the inner wall, and the lithium battery is crushed when the roller 33 intersects with the crushing wall 34 .

specific:

As shown in FIG. 12 , the hammer crusher 3 includes a second chassis 31 , a crushing hammer 32 and a roller 33 . A crushing wall 34 is provided in the second cabinet 31, and the crushing wall 34 is used to cooperate with the breaking hammer 32 to achieve the impact crushing effect. The size of the breaker 32 is used to control the crushing effect. The breaker 32 is fixed on the roller 33 through the rotating shaft. There are four circles, a total of four circles. 36 drive connections.

Optionally:

The screen sorting device 6 includes a third cabinet 62 and a vibration motor 64 that drives the vibration of the third cabinet 62. The third cabinet 62 is connected to the frame through an elastic member 65. The second screen 61 is placed horizontally inside the third cabinet 62. And the third cabinet 62 is divided into an upper floor and a lower floor, and the debris and powder fall onto the second screen cloth 61 and stay on the upper floor and the lower floor respectively, and the debris on the upper floor is vibrated by the vibrating motor 64 Move towards winnowing device 7 under the action of vibration.

specific:

As shown in Figures 13 and 14, the screen sorting device 6 includes a third cabinet 62, a cabinet cover plate 63, a vibrating motor 64 and an elastic member 65, and the second screen 61 is horizontally placed in the middle of the third cabinet 62. A material inlet is provided on the cover plate 63 , and debris and powder fall onto the second screen 61 through the material inlet.

The elastic member 65 is a spring, and the vibrating motor 64 is arranged on the lower side of the third cabinet 62, which drives the third cabinet 62 to vibrate together through its own energized vibration; The materials in the network port fall to the bottom of the third cabinet 62, and finally output to the collection box through the outlet below the third cabinet 62.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the spirit and protection scope of the present invention, and such modifications or equivalent replacements should also be considered as falling within the protection scope of the present invention.

Claims (10)

1. Broken selection by winnowing system of lithium cell, characterized by, include:

the crushing module is used for inputting the lithium battery and outputting fragments and powder;

a screen sorting device (6) for receiving the chips and powder and separating the chips and powder by a second screen (61);

a wind separation device (7) for receiving the chips and separating the metal chips and the nonmetal chips by the air flow;

wherein the air separation device (7) comprises:

a feed channel (71) connected to the output end of the screen sorting device (6) and used for throwing out fragments;

the discharging channels (72) are provided with 2 discharging channels and are arranged below the feeding channels (71) in parallel along the throwing direction of the fragments;

an air flow generator (73) which is arranged between the feeding channel (71) and the discharging channel (72) and outputs air flow to a conveying path of the fragments so as to change the sedimentation speed of the metal fragments and the nonmetal fragments, so that the metal fragments and the nonmetal fragments respectively fall into different discharging channels (72);

the flow dividing column (74) is horizontally arranged above the 2 discharging channels (72) in a transverse mode and is positioned on the flow path of the air flow output by the air flow generator (73), and the air flow output by the air flow generator (73) is sprayed on the cylindrical surface of the flow dividing column (74) to bypass the upper portion and the lower portion of the flow dividing column (74) and respectively flows to the 2 discharging channels (72).

2. The lithium battery crushing and screening system according to claim 1, wherein,

the air separation device (7) comprises a guide cover (75) which is covered on the outer side of the feeding channel (71), the flow dividing column (74) and the discharging channel (72), and the guide cover (75) extends from at least one side of the feeding channel (71) away from the discharging channel (72) to one side of the discharging channel (72) away from the feeding channel (71).

3. The lithium battery crushing and screening system according to claim 1 or 2, wherein,

the split column (74) includes:

a first mandrel (741) horizontally arranged above the 2 discharging channels (72) and positioned on the flow path of the air flow output by the air flow generator (73);

and a roller (742) which is sleeved on the outer side of the first mandrel (741) and can roll.

4. The lithium battery crushing and screening system according to claim 1, wherein,

the airflow generator (73) includes:

a blower (731);

a nozzle (732) hinged to the frame (1) and connected to the output end of the fan (731) through a pipe (733), the nozzle (732) being configured to form a uniform air flow between the feed channel (71) and the splitter post (74) that flows upward or obliquely upward;

and the driver is connected with the spray head (732) and the rack (1) and is used for driving the spray head (732) to rotate so as to change the pitching angle of the spray head (732).

5. The lithium battery crushing and screening system according to claim 1, 2 or 4, wherein,

the split column (74) includes:

a second mandrel (743) transversely arranged above the 2 discharge channels (72) and positioned on the flow path of the air flow output by the air flow generator (73);

-a frame metal detector (744) connected to the second mandrel (743) and located above the second mandrel (743), the frame metal detector (744) being adapted to signal when metal fragments pass.

6. The lithium battery crushing and screening system according to claim 5, wherein,

the second mandrel (743) is rotatably connected with the frame (1) around the axis of the second mandrel (743), the second mandrel (743) is connected with a torque sensor (745), and the torque sensor (745) is used for detecting the torque born by the second mandrel (743);

the frame metal detector (744) has mounted thereon a third screen (746) covering its frame, the third screen (746) having a mesh through which debris can pass.

7. The lithium battery crushing and screening system according to claim 6, wherein,

the frame metal detector (744) has a plurality and is uniformly distributed around the axis of the second mandrel (743), wherein the frame metal detector (744) moving over the second mandrel (743) is energized.

8. The lithium battery crushing and screening system according to claim 1, wherein,

the crushing module includes:

a roller crusher (2) for crushing lithium batteries by means of staggered crushing teeth (22);

a hammer crusher (3) connected to the output end of the roller crusher (2) and for crushing lithium batteries by means of a crushing hammer (32);

the first screen (4) is arranged at the lowest position inside the hammer crusher (3) and is close to the breaking hammer (32), fragments larger than meshes of the first screen (4) are taken away from the first screen (4) by the breaking hammer (32) which rotates and continue to be broken, and fragments smaller than meshes of the first screen (4) move to the screen sorting device (6) through the first screen (4).

9. The lithium battery crushing and screening system according to claim 8, wherein,

the roller crusher (2) comprises a first machine case (21), a driving roller (23) and a driven roller (24), wherein the driving roller (23) and the driven roller (24) are parallel to each other and are rotationally connected with the first machine case (21), the driving roller (23) and the driven roller (24) are driven by a motor to reversely rotate, crushing teeth (22) are formed on each roller, and adjacent crushing teeth (22) are staggered with each other to crush a lithium battery when rotating;

the hammer crusher (3) comprises a second machine case (31) and a roller (33), the roller (33) is rotationally connected with the second machine case (31) and is driven to rotate by a motor, the crushing hammers (32) are provided with a plurality of crushing walls (34) which correspond to the crushing hammers (32) and are fixedly connected with the roller (33), and the crushing walls (34) are formed on the inner wall of the second machine case (31), so that lithium batteries are crushed when the roller (33) and the crushing walls (34) are staggered.

10. The lithium battery crushing and screening system according to claim 1, 8 or 9, wherein,

the screen sorting device (6) comprises a third machine case (62) and a vibrating motor (64) driving the third machine case (62) to vibrate, the third machine case (62) is connected with a frame through an elastic piece (65), the second screen (61) is horizontally transversely arranged in the third machine case (62) and divides the third machine case (62) into an upper layer and a lower layer, fragments and powder fall onto the second screen (61) and stay on the upper layer and the lower layer respectively, and the fragments located on the upper layer move towards the winnowing device (7) under the vibrating action of the vibrating motor (64).

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