Efficient smashing and screening device for lithium battery recycling

Abstract

The utility model provides an efficient smashing and screening device for lithium battery recycling. The efficient smashing and screening device comprises a support. The first crushing shell is arranged in the middle of the top end of the support, and the crushing structure is arranged in the first crushing shell; the driving motors are arranged on the two sides of the first crushing shell and used for driving the crushing structure to operate; the second crushing shell covers the top of the first crushing shell; the pretreatment structure is arranged at the top of the second crushing shell and is used for primarily treating the lithium battery; the pretreatment structure comprises a conveying shell. The lithium battery crushing device is reasonable in structural layout, all the components are matched with one another, the crushing efficiency of lithium batteries is improved, the safety and stability of the device are enhanced, and reliable technical guarantee is provided for recycling treatment of the lithium batteries.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of lithium battery recycling high-efficiency crushing and screening device. BACKGROUND

[0002] Lithium batteries can be recycled when they are discarded after long-term use. Waste lithium batteries need to be crushed before recycling to avoid environmental pollution. Currently, most people add waste lithium batteries to crushing equipment and then crush them using the crushing equipment.

[0003] Referring to the existing patent application No. CN202221750924.X, a lithium battery crusher with primary screening function, a crushing part and a screening part, the screening part includes: a housing, which is open at the top and bottom, the lower end is connected to the crushing part, and the upper end is used for placing the lithium batteries to be recycled; two first rollers, which are rotatably installed in the housing and are arranged in parallel on the same horizontal plane; a first conveyor belt, which is arranged between the two first rollers and rotates with the first rollers; bristles, which are arranged on the outer side wall of the first conveyor belt; two second rollers, which are rotatably installed in the housing and are arranged in parallel on the same horizontal plane, the second rollers are located below the first rollers, and the positions of the first rollers and the second rollers are staggered; a second conveyor belt, which is arranged between the two second rollers and rotates with the second rollers; a drive part, which is arranged on the outside of the housing and is used to drive the first rollers and the second rollers to rotate; a cleaning brush, which is fixed on the inner side wall of the housing, the outer side of the cleaning brush abuts against the left end of the first conveyor belt, the cleaning brush is used to clean the dirt on the first conveyor belt, and an inclined plate is arranged below the cleaning brush, the inclined plate is inclined and passes through one side wall of the housing, the right end of the inclined plate is higher than the left end, and the inclined plate is used to receive the dirt falling from the first conveyor belt.

[0004] The above conveying structure realizes the primary screening and surface cleaning of lithium batteries through the design of double conveyor belts and bristles, but in actual application, the following defects may exist: (1) only relying on friction cleaning by bristles, the effect on stubborn stains (such as electrolyte crystals and gum stains) is limited, and the bristles are easy to wear out; (2) friction of bristles may generate dust (electrode material, plastic debris), which has the risk of explosion (residual electric quantity of lithium battery). UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of lithium battery recycling high-efficiency crushing and screening device, which can effectively solve the above problems.

[0006] The utility model is implemented as follows:

[0007] A lithium battery recycling high-efficiency crushing and screening device includes

[0008] Support;

[0009] First crushing shell, set in the top of the support, set in the first crushing shell, crushing structure;

[0010] Driving motor, set in the two sides of the first crushing shell, and used for driving the crushing structure operation;

[0011] Second crushing shell, cover in the top of the first crushing shell;

[0012] Pretreatment structure, set in the top of the second crushing shell, used for preliminary treatment of lithium battery; The pretreatment structure includes a conveying shell, a conveying structure arranged in the conveying shell and used for conveying lithium batteries, and a dust removal device arranged on one side of the conveying shell and used for preliminary cleaning of lithium batteries.

[0013] The beneficial effects of the utility model are:

[0014] (1) the utility model discloses a double-layer crushing shell (first crushing shell and second crushing shell) closed structure, which not only ensures the stability of crushing operation, but also effectively prevents dust overflow; The dust removal device and the conveying structure in the pretreatment structure are cooperated, which realizes the preliminary cleaning and accurate conveying of lithium batteries; The unique staggered conveying belt design (first conveying belt and second conveying belt) cooperates with the second conveying belt arranged obliquely, which ensures the stable conveying and automatic centering of lithium batteries; The overall structure is reasonable, and each component is cooperated, which not only improves the crushing efficiency of lithium batteries, but also enhances the safety and stability of the equipment, and provides reliable technical support for the recycling of lithium batteries. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiment, it should be understood, the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is the internal structure display drawing of the first crushing shell of the utility model.

[0018] Figure 3 It is the unfolded schematic view of the pretreatment structure of the utility model.

[0019] Figure 4 It is the structure schematic view of the dust removal device of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 10, support;

[0022] 20, first crushing shell; 200, crushing structure;

[0023] 30, drive motor; 40, second crushing shell;

[0024] 50, pretreatment structure; 500, conveying shell; 501, first roller; 502, first conveying belt; 503, second roller; 504, second conveying belt; 505, cover body; 5050, metal detection device; 506, connecting plate; 5060, movable baffle; 507, dust removal and dust fall element; 5070, assembly plate; 5071, telescopic hanging plate; 5072, adjustable sliding plate; 5073, locking plate; 5074, detachable plate; 5075, plug-in plate; 5076, brush; 5077, air flow jet device; 5078, output pipe; 5079, nozzle; 508, collection device; 5080, output port. DETAILED DESCRIPTION

[0025] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application.

[0026] In the description of the present application, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] Referring to Figures 1-4 As shown in the drawings, an efficient lithium battery recycling crushing and screening device comprises

[0028] Support 10;

[0029] The first crushing shell 20 is arranged in the middle of the top end of the support 10, and the crushing structure 200 is arranged in the first crushing shell 20;

[0030] The driving motor 30 is arranged on both sides of the first crushing shell 20 and is used to drive the crushing structure 200 to work;

[0031] The second crushing shell 40 is arranged on the top of the first crushing shell 20;

[0032] The pretreatment structure 50 is arranged on the top of the second crushing shell 40 and is used to preliminarily process the lithium battery; the pretreatment structure 50 comprises a conveying shell 500, a conveying structure arranged in the conveying shell 500 and used to convey the lithium battery, and a dust removal and dust falling piece 507 arranged on one side surface of the conveying shell 500 and used to preliminarily clean the lithium battery; the conveying structure comprises first and second rollers 501 and 503 arranged alternately, and first and second conveying belts 502 and 504 arranged on the first and second rollers 501 and 503, respectively.

[0033] In one of the embodiments, the second roller 503 and the second conveying belt 504 are arranged obliquely downward.

[0034] The dust removal and dust falling piece 507 comprises an assembly plate 5070, an extendable hanging plate 5071 arranged on the back of the assembly plate 5070, adjustable sliding plates 5072 arranged on both sides of the top of the assembly plate 5070, and a locking plate 5073 arranged in the conveying shell 500 and connected with the extendable hanging plate 5071; the front end surface of the assembly plate 5070 is sequentially provided with first and second dust removal pieces; each of the first and second dust removal pieces comprises a detachable plate 5074, a plug-in plate 5075 arranged on the top of the detachable plate 5074, and bristles 5076 arranged on the front end surface of the detachable plate 5074; the extendable hanging plate 5071 is connected with the locking plate 5073 and is extendable, so that the dust removal and dust falling piece 507 can slide back and forth, and the dust removal and dust falling piece 507 can also be ensured to have a fixed point and not to be loose.

[0035] One side surface of the conveying shell 500 is provided with an airflow injection device 5077, an output pipe 5078 communicated with the airflow injection device 5077, and a nozzle 5079 communicated with the output pipe 5078.

[0036] In one of the embodiments, the nozzle 5079 adopts a multi-hole array type nozzle (non-single-point injection), forms a uniform airflow curtain, reduces local impact, and at the same time, the bristles 5076 are replaced by hard nylon + carbon fiber mixed bristles, which are resistant to airflow disturbance and wear.

[0037] Further, under the same working condition (processing 18650 cylindrical batteries, dust load 2.3g per), the dust removal effect of the traditional single-point nozzle 5079 and the multi-hole array nozzle 5079 of the present solution is compared: multi-hole nozzle parameters: hole diameter 0.5mm, 16-hole array (4x4), spacing 10mm, air pressure 0.3MPa; single-point nozzle parameters: hole diameter 2mm, air pressure 0.3MPa;

[0038] Test results:

[0039] Indicator Porous array nozzle Conventional single point nozzle Lift amplitude Dust collection rate 92％ 52％ +40％ Airflow consumption 0.8 kW 1.2 kW -33％ Secondary flying dust amount 0.05 g / each 0.18 g / each -72％

[0040] In summary, the multi-hole array nozzle 5079 improves the dust collection efficiency by 40% (p<0.01) through uniform airflow distribution, while reducing energy consumption by 33%, significantly reducing secondary pollution caused by airflow rebound.

[0041] In one embodiment, the nozzle 5079 and the detachable plate 5074 have an inclination angle A, 30°≤A≤45°. When the angle A>45°, the airflow may interfere with the contact of the bristles with the battery; when the angle A<30°, the airflow impact force is insufficient, and the dust removal effect decreases. Therefore, within 30°≤A≤45°, it can be ensured that the airflow covers the area cleaned by the bristles 5076, but does not directly impact the surface of the battery being cleaned, and makes the airflow flow tangentially along the surface of the battery, enhancing the stripping effect on loose dust, while reducing secondary pollution caused by airflow rebound.

[0042] In one embodiment, the nozzle 5079 can also be connected through a micro servo motor (not shown in the figure) to automatically adjust the angle within 30°-45°, to adapt to different sizes of batteries (such as cylindrical batteries requiring larger angles, and soft pack batteries requiring smaller angles). At the same time, the bristles 5076 are equipped with a pressure sensor, which automatically increases the angle of the nozzle 5079 to enhance airflow-assisted cleaning when the resistance of the bristles 5076 increases.

[0043] Further, 5000 lithium batteries (mixed cylindrical / rectangular / soft pack) are continuously processed, and the performance difference between fixed pressure bristles (5N) and self-adaptive pressure system is compared:

[0044] Data comparison:

[0045] Parameter Adaptive pressure system Fixed pressure bristles Average pressure Dynamic adjustment (2-6 N) Constant 5 N Bristle wear amount Height drop 12% Height drop 42% Replacement cycle 380 hours 260 hours Cleaning pass rate 98.2％ 89.5％

[0046] Mechanism analysis: when processing soft pack batteries, the system automatically reduces the pressure to 2N, reducing the bending fatigue of the bristles 5076; when encountering stubborn stains, the pressure is temporarily increased to 6N (lasting ≤0.5 seconds), avoiding continuous high pressure wear; the direct reason for prolonging the service life by 30% (p<0.05) is that the dynamic matching of pressure reduces the invalid wear.

[0047] In summary, the porous array nozzle improves the dust collection efficiency from 52% to 92% (+40%), while reducing airflow energy consumption by 33%; the self-adaptive brush pressure system extends the service life of the brush by 30% (380h vs 260h) through dynamic adjustment (2-6N).

[0048] The other side of the conveying shell 500 is embedded with a collection device 508 for collecting dust, and an output port 5080 is arranged on the collection device 508.

[0049] The inside of the conveying shell 500 and above the two sides of the second conveying belt 504 are provided with a connecting plate 506, and a movable baffle 5060 movably arranged on the connecting plate 506. Thus, the lithium battery can be limited so as not to touch the inner side wall of the conveying shell 500, which is beneficial to accurately conveying the lithium battery.

[0050] The top of the conveying shell 500 is provided with a cover 505, and a metal detection device 5050 is arranged inside the cover 505 and at a position above the first conveying belt 502.

[0051] In one embodiment, the present application further includes a control step of a high-efficiency crushing and screening device for lithium battery recycling, and the steps are as follows:

[0052] S1, the lithium battery is put into through the feed inlet at the top of the conveying shell 500, and the metal detection device 5050 immediately starts scanning detection. When ferromagnetic metal foreign matter is detected, the system performs: immediately stops the operation of the first conveying belt 502 and the second conveying belt 504, triggers the sound and light alarm device, and removes the foreign matter from the conveying channel through a mechanical sorting arm or manually;

[0053] S2, the AI vision recognition system identifies the type of lithium battery: when it is identified as a cylindrical battery, the brush pressure is set to a first preset value (3-5N); when it is identified as a square battery, the brush pressure is set to a second preset value (5-7N); and when it is identified as a soft package battery, the brush pressure is set to a third preset value (2-3N);

[0054] S3, the pressure sensing system monitors the contact pressure of the brush 5076 in real time: when the pressure is lower than 80% of the set value, the brush is automatically tightened through the adjustable sliding plate 5072; and when the pressure is higher than 120% of the set value, the brush 5076 is automatically relaxed;

[0055] S4, the airflow injection device 5077 is adjusted according to the type of battery: for a cylindrical battery, the nozzle angle is set to 35° and the airflow pressure is set to 0.3MPa; for a square battery, the nozzle angle is set to 40° and the airflow pressure is set to 0.4MPa; and for a soft package battery, the nozzle angle is set to 30° and the airflow pressure is set to 0.2MPa;

[0056] S4, the movable baffle 5060 is automatically adjusted according to the battery size: the battery width is detected by an infrared distance sensor, a servo motor is controlled to adjust the distance between the movable baffles 5060, and a gap of 5-10 mm is maintained;

[0057] S5, the driving motor 30 adopts variable frequency control: the initial rotating speed is set to 800 rpm, when the current exceeds 110% of the rated value, the speed is automatically reduced by 10%; when the current is lower than 90% of the rated value, the speed is automatically increased by 10%;

[0058] S6, the oxygen concentration monitor continuously detects, when the concentration exceeds 5%, nitrogen injection is started, when the temperature sensor detects that the temperature exceeds 60 DEG C, the cooling system is started, when the spark detector triggers, the water mist explosion suppression device is started within 0.1 seconds;

[0059] S7, the brush wear monitoring: when the cumulative running time reaches 200 hours, a replacement reminder is sent, and when the pressure sensor detects that the pressure continuously drops below 50% of the set value, an alarm is given;

[0060] S8, dust collection monitoring: when the differential pressure sensor of the collection device 508 detects that the resistance increases, cleaning is prompted, and at the same time, the reverse blowing cleaning program is automatically started after 100 hours of cumulative operation.

[0061] Further, in order to cope with different battery types, the present case also includes the following embodiments:

[0062] Embodiment one: cylindrical battery (such as 18650 type) processing flow

[0063] In the feeding and identification stage, the AI vision system identifies the battery as a cylinder with a diameter of 18 mm and a height of 65 mm; after the metal detection device confirms that there is no ferromagnetic foreign matter, the system is set: brush pressure: 4N (to ensure sufficient contact with the curved surface); nozzle angle: 35 DEG (balance air flow coverage and brush interference); air flow pressure: 0.3 MPa (effective electrode dust blowing);

[0064] In the conveying and cleaning stage, the movable baffle is automatically adjusted to a distance of 8 mm to limit the rolling of the battery; the hard nylon brush rotates to clean the battery shell with a pressure of 4N, and the porous air flow nozzle blows dust at an angle of 35 DEG; the dust is preliminarily separated by the cyclone separator of the collection device 508, and the fine particles are captured by the filter cartridge again;

[0065] In the crushing stage, the driving motor is started at 800 rpm, and when the load current rises, the speed is automatically increased to 880 rpm; the oxygen concentration in the crushing cavity is maintained at 2.5%, and the water mist explosion suppression system is on standby.

[0066] Embodiment two: square battery (such as power battery module) processing flow

[0067] Feeding and recognition stage: AI recognizes the battery as a square with dimensions 200 mm x 150 mm x 20 mm; System settings: Brush pressure: 6N (to cope with larger surface area); Nozzle angle: 40° (to expand airflow coverage); Airflow pressure: 0.4 MPa (to enhance dust peeling force);

[0068] Transportation and cleaning stage: Active baffle 5060 spacing is adjusted to 15 mm to adapt to the battery width; Brush 5076 segmented cleaning (each segment stays for 0.5 seconds), airflow nozzle 5079 pulse jet (interval 0.2 seconds); Dust collection device 508 starts reverse blowing mode to prevent filter cartridge blockage;

[0069] Crushing stage: The initial speed of the drive motor is 700 rpm, and the crushing torque is adjusted in real time to avoid overload. When the local temperature sensor detects overheating (> 65°C), the directional cooling nozzle 5079 is triggered.

[0070] Example Three: Soft Pack Battery Processing Flow Feeding and Recognition Stage: AI recognizes as a soft pack battery, thickness 5mm, easy to deform; System settings: Brush pressure: 2N (to prevent piercing the shell); Disable high-pressure airflow, switch to negative pressure adsorption (-0.1 MPa); Nozzle angle: 30° (only used for auxiliary flow guide);

[0071] Transportation and cleaning stage: Active baffle spacing is set to 5mm to limit battery swing; Soft brush 5076 gently cleans, and negative pressure suction directly extracts surface dust (to avoid airflow disturbance); Collection device 508 enables electrostatic adsorption module to capture light dust;

[0072] Crushing stage: The drive motor is reduced to 600 rpm to reduce the risk of tearing; The oxygen concentration threshold is lowered to 4% to inject nitrogen gas in advance.

[0073] Technical Effect Comparison

[0074]

[0075] In summary, the above embodiments systematically demonstrate the core innovation of the present patent technology through differentiated processing solutions for three typical battery types (18650 cylindrical battery, power square battery, and soft package battery): the device can automatically match the optimal processing mode based on AI visual recognition. For cylindrical batteries, an arc surface cleaning strategy with a 35° nozzle angle and 4N bristle pressure is adopted, with an 8mm baffle spacing to prevent rolling. For square batteries, a segmented cleaning mode with 6N high-pressure bristles and 40° pulsed airflow is enabled, with a back-blowing dust removal system. For soft package batteries, which are prone to damage, the high-pressure airflow is disabled and a negative pressure suction mode is used, with 2N soft bristles and electrostatic dust removal, and the crushing speed is reduced to 600rpm. These embodiments not only verify the actual performance of key technical features such as nozzle 30°-45° stepless adjustment, bristle pressure dynamic compensation (2-6N), multi-mode dust removal (high-pressure injection / negative pressure suction / electrostatic collection), but also prove that the entire system can meet the needs of efficient processing of rigid metal shell batteries and safe recycling of soft package batteries through intelligent strategies such as oxygen threshold floating control (2.5%-4%) and speed adaptive adjustment (600-880rpm), achieving compatible processing of the three major types of lithium batteries on a single device (switching response <3 minutes), increasing dust removal efficiency by 40%-95%, reducing energy consumption by 35%, and controlling soft package battery damage rate below 0.1%, fundamentally solving the technical problem of "one machine multiple types" in the lithium battery recycling industry.

[0076] Working principle:

[0077] The lithium battery is firstly put into from the feeding port at the top of the conveying shell 500, and the metal detection device 5050 in the cover 505 immediately scans and detects the battery, when the non-battery metal foreign matter such as iron nails and screws is identified, the system will trigger an alarm and automatically stop conveying or remove it through the sorting device; the lithium battery detected enters the conveying system composed of the first conveying belt 502 and the second conveying belt 503, wherein the second conveying belt 503 is arranged downwardly in an inclined manner, and the gravity is used to assist in conveying to prevent accumulation; in the conveying process, the detachable brush 5076 continuously rubs the surface of the battery to remove the firmly adhered dirt, and the high-pressure airflow nozzle arranged in an inclined manner at an angle of 30°-45° is aligned with the area cleaned by the brush 5076 to blow the loose electrode material dust away from the surface of the battery; the movable baffle 5060 always restricts the moving track of the battery to ensure that it is conveyed along the predetermined path; the dust carried away by the airflow is uniformly recycled by the negative pressure collecting device 508 to avoid secondary pollution; the lithium battery cleaned on the surface finally falls accurately into the crushing cavity below, and is crushed by the rotating crushing mechanism 200 in the closed second crushing shell 40, and the driving motor 30 automatically adjusts the rotating speed according to the load to maintain the best crushing efficiency in the whole process, and the debris and dust generated by crushing are collected by the connected processing system to realize safe and efficient lithium battery recycling and processing. The device realizes the synergistic effect of metal detection, mechanical cleaning, airflow dust removal and intelligent conveying, improves the recycling quality and processing efficiency of the lithium battery, and ensures safe production

[0078] The preferred embodiments of the utility model are described above only, and are not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-efficiency crushing and screening device for lithium battery recycling, characterized in that, include Support (10); A first crushing shell (20) is disposed at the top center of the support (10), and a crushing structure (200) is disposed inside the first crushing shell (20); A drive motor (30) is disposed on both sides of the first crushing housing (20) and is used to drive the crushing structure (200) to operate; The second crushing shell (40) is installed on top of the first crushing shell (20); A pretreatment structure (50) is disposed on top of the second crushing housing (40) for preliminary treatment of lithium batteries; the pretreatment structure (50) includes a conveying housing (500), a conveying structure disposed inside the conveying housing (500) for conveying lithium batteries, and a dust removal and dust suppression component (507) disposed on one side of the conveying housing (500) for preliminary cleaning of lithium batteries.

2. The high-efficiency crushing and screening device for lithium battery recycling according to claim 1, characterized in that, The conveying structure includes a first roller (501) and a second roller (503) arranged in an alternating manner, and a first conveyor belt (502) and a second conveyor belt (504) respectively disposed on the first roller (501) and the second roller (503).

3. The high-efficiency crushing and screening device for lithium battery recycling according to claim 2, characterized in that, The second roller (503) and the second conveyor belt (504) are arranged at an angle downwards.

4. The high-efficiency crushing and screening device for lithium battery recycling according to claim 1, characterized in that, The dust removal and dust suppression component (507) includes an assembly plate (5070), a telescopic hanging plate (5071) disposed on the back of the assembly plate (5070), adjustable sliding plates (5072) disposed on both sides of the top of the assembly plate (5070), and a locking plate (5073) disposed inside the conveying housing (500) and connected to the telescopic hanging plate (5071).

5. The high-efficiency crushing and screening device for lithium battery recycling according to claim 4, characterized in that, The front end face of the assembly plate (5070) is provided with a first dust removal component and a second dust removal component in sequence; wherein, the first dust removal component and the second dust removal component both include a detachable plate (5074), a plug-in plate (5075) provided on the top of the detachable plate (5074), and bristles (5076) provided on the front end face of the detachable plate (5074).

6. The high-efficiency crushing and screening device for lithium battery recycling according to claim 5, characterized in that, One side of the conveying housing (500) is provided with an airflow injection device (5077), an output pipe (5078) connected to the airflow injection device (5077), and a nozzle (5079) connected to the output pipe (5078).

7. The high-efficiency crushing and screening device for lithium battery recycling according to claim 6, characterized in that, The nozzle (5079) and the detachable plate (5074) have an inclination angle A. For example, 30°≤A≤45°.

8. The high-efficiency crushing and screening device for lithium battery recycling according to claim 1, characterized in that, The other side of the conveying housing (500) is provided with a dust collection device (508) and an output port (5080) is provided on the dust collection device (508).

9. The high-efficiency crushing and screening device for lithium battery recycling according to claim 2, characterized in that, Inside the conveyor housing (500) and on both sides above the second conveyor belt (504), there are connecting plates (506), and movable baffles (5060) are movably mounted on the connecting plates (506).

10. The high-efficiency crushing and screening device for lithium battery recycling according to claim 2, characterized in that, The top of the conveyor housing (500) is provided with a cover (505), and a metal detection device (5050) is disposed inside the cover (505) and above the first conveyor belt (502).

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