Charged crushing and solid-liquid separation system for waste batteries and application method of charged crushing and solid-liquid separation system

Abstract

The invention belongs to the technical field of waste battery recovery, and particularly relates to a waste battery charged crushing and solid-liquid separation system and an application method thereof. The system comprises a controller, and further comprises a crushing device, a solid-liquid separation device and a filtering device which are connected in sequence, the controller is connected with the crushing device, the solid-liquid separation device and the filtering device, and the controller controls starting and stopping of the crushing device, the solid-liquid separation device and the filtering device. According to the system, waste battery particles and electrolyte can be crushed, solid-liquid separation can be achieved, the integration degree is high, crushed batteries are temporarily stored in the buffer box, the electrolyte and crushed pieces can be separated as far as possible through the vibration device, surrounding inert gas serves as shielding gas in the shell, real-time feedback is achieved through the oxygen concentration detector and the smoke concentration detector, and the safety of the battery is guaranteed. And fire and explosion caused by short circuit of the battery in the electrified crushing process are avoided, so that the electrolyte is efficiently recycled, and the harm to the environment is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of waste battery recycling, and specifically relates to a waste battery live crushing and solid-liquid separation system and an application method thereof. Background Art

[0002] Lithium-ion batteries have the advantages of high operating voltage, high specific energy, small size and light weight, no memory effect, and a wide operating temperature range. They are widely used in production and life as portable power sources. At the same time, with the country's vigorous promotion of electric vehicles, a large number of batteries will face the problem of being scrapped in the future. The recycling rate of waste batteries in my country is relatively low, and a large number of discarded batteries have caused waste of resources and energy and environmental pollution.

[0003] Lithium-ion batteries are mainly composed of shells, positive electrode materials, negative electrode materials, current collectors, diaphragms and electrolytes, many of which are valuable components worth recycling. If they are not crushed and disassembled, the valuable materials and components in the waste batteries cannot be recovered. Generally, the batteries need to be disassembled and sorted in the pre-processing stage. Discharging first and then disassembling by manpower or machine increases the workload of recycling.

[0004] In view of this, it is necessary to provide a new process to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a system for the live crushing and solid-liquid separation of used batteries and its application method. On the one hand, used batteries can be crushed and disassembled without discharge pretreatment, and on the other hand, the solid-liquid mixture can be better separated, which is safe, environmentally friendly and efficient. The technical solution adopted is:

[0006] A system for live crushing and solid-liquid separation of used batteries, comprising a controller, a crushing device, a solid-liquid separation device and a filtering device connected in sequence;

[0007] The crushing device comprises a shell, a feed port is arranged at the center of the top of the shell, the feed port is connected to the collection box, a shearing shredder is arranged in the shell, and the bottom of the shell is connected to the buffer box through a discharge pipe;

[0008] The bottom outlet of the buffer box is connected to the inlet of the solid-liquid separation device, and the solid-liquid separation device includes an outer shell, an inlet is arranged in the outer shell, and a first collecting bucket, a second collecting bucket, a filter plate, and a vibration device are arranged in the outer shell; the inlet of the solid-liquid separation device is directly opposite to the filter plate below, and the inlet is located at the right end of the filter plate (to the right of the center, and an adaptive position is set as needed to facilitate the up and down swinging of the left side of the filter plate); the left end of the filter plate is connected to the second collecting bucket through an inclined plate, and a collecting cover is arranged below the filter plate, and the right end of the collecting cover is connected to the first collecting bucket at the lower right side of the filter plate; the vibration device is installed below the filter plate and is connected to the filter plate through a connecting rod, and the connecting rod is fixed to both sides of the outer end of the left side of the filter plate.

[0009] A liquid outlet pipe is provided at the bottom end of the first collecting barrel, and the liquid outlet pipe is connected to a filtering device;

[0010] As a further preference, an outlet is provided at the bottom of the second collecting barrel, and an automatic sealing plate is installed at the outlet, so that the broken pieces of waste batteries can be discharged for further processing.

[0011] The controller is connected to the crushing device, the solid-liquid separation device and the filtering device, and controls the start and shut down of the crushing device, the solid-liquid separation device and the filtering device. The crushing device and the solid-liquid separation device are connectable and detachable.

[0012] Preferably, the collecting box and the discharge pipe are funnel-shaped structures, and automatic sealing plates are hinged between the bottom end of the feed port and the crushing device shell, between the bottom end of the crushing device shell, between the bottom end of the discharge pipe and the buffer box inlet, and between the bottom end of the buffer box and the solid-liquid separation device inlet. Each automatic sealing plate is connected to the controller and controlled by the controller.

[0013] Preferably, the crushing device shell is a square structure, a dry ice spray head is arranged at the top of the interior, inert gas inlets are arranged at the four corners of the interior bottom, and a first gas outlet is arranged on the upper side of the shell side wall; the solid-liquid separation device shell is a square structure, a dry ice spray head is arranged at the top of the interior, inert gas inlets are arranged at the four corners of the interior bottom, and a second gas outlet is arranged on the upper side of the shell side wall. The dry ice spray head is a shower-type structure, and the dry ice spray head is connected to the dry ice spray device through a connecting pipe to provide dry ice.

[0014] Preferably, oxygen concentration detectors are provided at both the first air outlet and the second air outlet.

[0015] Preferably, smoke concentration detectors are provided at both the first air outlet and the second air outlet.

[0016] Preferably, each inert gas inlet is connected to an inert gas supply device via an inlet pipe, and inert gas is introduced as a protective gas.

[0017] Preferably, baffles are arranged at the right end and front and rear sides of the filter plate, and filter holes are arranged on the bottom end surface of the filter plate; baffles are arranged at the front and rear sides of the inclined plate; baffles are arranged at the left end and front and rear sides of the collecting cover; the height of the baffles is set according to actual needs.

[0018] The right end of the collecting cover is connected to the first collecting barrel at an angle downward, and the liquid outlet pipe is arranged at the center of the bottom end surface of the first collecting barrel, and its bottom end surface is inclined downward toward the center, so that the liquid can enter the filter as soon as possible without any residue.

[0019] Preferably, a movable bearing and two fixed bearings are provided in the solid-liquid separation device, wherein one fixed bearing is installed between the right outer end of the filter plate and the outer shell, and the other fixed bearing is installed on the outer shell below the left side of the filter plate. The movable bearing is installed at the left outer end of the filter plate, and the movable bearing is connected to the fixed bearing on the left side through a support rod, driving the left side of the filter plate to move up and down. When there are fewer battery fragments, the left side of the filter plate can swing up and down slightly driven by the vibration device; as the battery fragments continue to fall, the filter plate will slowly tilt to the left under the action of gravity, so that the battery fragments fall into the second collection bucket through the inclined plate. The highest position of the left side of the filter plate driven by the movable bearing is level with the right side of the filter plate, and the lowest position is level with the left fixed bearing below. The fixed bearing on the left side is set to a position lower than the fixed bearing on the right side as needed.

[0020] Preferably, the filtering device comprises a filter and a filtrate collecting box; a filter membrane is arranged in the middle of the filter, and the pore size of the filter membrane is 300 to 600 meshes.

[0021] As a further preference, a filtrate discharge pipe is provided at the bottom end or the side bottom end of the filtrate collection box, and the filtrate discharge pipe is provided with an automatic valve so as to collect the filtrate for further processing.

[0022] The vibrating device can be a variety of vibration modes, such as a gas vibrator, an electromagnetic vibrator, and a hydraulic vibrator.

[0023] An application method of a waste battery live crushing and solid-liquid separation system comprises the following steps:

[0024] (1) Place the charged waste batteries into the collection box, turn on the inert gas supply device, fill the crushing device housing with inert gas as protective gas, set the oxygen concentration threshold K and smoke concentration threshold M detected by the oxygen concentration detector and the smoke concentration detector, and start the crushing work when the detected oxygen concentration value is less than K and the smoke concentration value is less than M, and control the feed amount through the automatic sealing plate;

[0025] (2) The controller starts the automatic sealing plate, and the charged used batteries in the collection box fall into the shearing shredder through the feed port for shredding. The smoke detector detects in real time and transmits the data to the controller. When the smoke concentration is greater than M, the controller starts the dry ice spray head to continuously extinguish the fire in the shearing shredder. The oxygen concentration detector detects in real time and transmits the data to the controller. If the oxygen concentration is greater than K, the controller starts the dry ice spray head.

[0026] (3) The broken waste batteries are discharged from the discharge pipe and fall into the buffer box, and then fall onto the filter plate through the outlet of the buffer box. At this time, the vibration device generates high-frequency vibration to separate the battery fragments from the electrolyte. At the same time, the vibration device causes the broken waste batteries to move to the left side of the filter plate. The electrolyte falls into the first collection bucket through the collection cover. The battery fragments tilt the filter plate to the left under the action of gravity and the movable bearing and the fixed bearing, and fall into the second collection bucket through the tilting plate. The second collection bucket is provided with an outlet connected to the pyrolysis furnace so as to further process the broken waste batteries. When the filter plate falls onto the broken waste batteries from the buffer box again, the right side of the filter plate is heavy, and the left side rises slowly, and the vibration filtration continues;

[0027] (4) After the electrolyte enters the first collection bucket, it enters the filtering device through the liquid outlet pipe, and falls into the liquid collection box after further separation. A discharge port is set at the bottom side of the liquid collection box to discharge the filtrate.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The waste battery live crushing and solid-liquid separation system of the present invention can tear, crush, separate solids and liquids, and filter waste battery fragments and electrolytes with high concentration. The surrounding inert gas in the shell serves as a protective gas, which effectively prevents the existence of gas diffusion dead corners. The oxygen concentration detector and the smoke concentration detector provide real-time feedback. When the detection value is too large, a dry ice spray head is used to reduce the oxygen concentration and extinguish the fire, thereby avoiding fire and explosion caused by battery short circuit during the live crushing process.

[0030] The system of the present invention provides a buffer box in which broken batteries can be temporarily stored, especially when there are too many broken batteries on the filter plate, reducing the broken batteries falling on the filter plate to avoid incomplete solid-liquid separation on the filter plate, thereby achieving better filtering effect.

[0031] The system of the present invention is provided with a vibration device on the filter plate, so that the electrolyte and the broken pieces can be separated as much as possible;

[0032] The invention discloses an application method of a waste battery live crushing and solid-liquid separation system, which enables the electrolyte to be efficiently recovered, thus not only utilizing resources but also avoiding harm to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of the crushing device of the present invention.

[0034] In the figure, 1, crushing device, 101, shell, 102, feed port, 103, discharge pipe, 104, buffer box, 105, shearing shredder, 106, collection box, 107, automatic sealing plate, 108-1 to 108-4, inert gas inlet, 109-1, 109-2, dry ice spray head, 110, oxygen concentration detector, 111, smoke concentration detector, 112, first outlet.

[0035] Figure 2 It is a diagram showing the internal structure of the solid-liquid separation device and the filtering device of the present invention.

[0036] In the figure, 2, solid-liquid separation device, 3, filtering device, 201, first collecting barrel, 202, second collecting barrel, 203, filter plate, 204, vibration device, 205, inclined plate, 206, collecting cover, 207, liquid outlet pipe, 208, movable bearing, 209, housing, 210, fixed bearing, 211, second air outlet, 212-1~212-4, inert gas inlet, 213-1, 213-2, dry ice spray head, 214, oxygen concentration detector, 215, smoke concentration detector, 216, inlet, 217, connecting rod; 301, filter, 302, filter membrane, 303, liquid collection box. DETAILED DESCRIPTION

[0037] The drawings are for illustrative purposes only; for those skilled in the art, some well-known structures and their descriptions in the drawings may be omitted, such as the connection between the motor and the controller, and therefore, they cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; the terms "upper", "lower", "left", "right", "side", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention.

[0038] It should be understood that “first”, “second”, etc. are only for the convenience of description and do not refer to certain technical features and cannot be understood as limitations on the present invention.

[0039] The principles and features of the present invention are described below in conjunction with the examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. If no specific conditions are specified in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturers of the instruments and equipment used are not specified, they are all conventional products that can be purchased commercially. Other technical methods not described adopt existing technologies.

[0040] Example 1

[0041] A system for live crushing and solid-liquid separation of used batteries, including a controller (omitted in the figure), a crushing device 1, a solid-liquid separation device 2, and a filtering device 3 connected in sequence. The crushing device 1 includes a housing 101, a feed port 102 is arranged at the center of the top of the housing 101, a collection box 106 is connected to the feed port 102, a shearing shredder 105 is arranged in the housing 101, and the bottom of the housing 101 is connected to a buffer box 104 through a discharge pipe 103;

[0042] The bottom outlet of the buffer box 104 is connected to the inlet of the solid-liquid separation device 2. The solid-liquid separation device 2 includes a shell 209. The shell 209 is provided with an inlet 216. The inlet 216 is adapted to the outlet of the buffer box 104 and can be connected together. A first collecting barrel 201, a second collecting barrel 202, a filter plate 203, and a vibration device 204 are arranged in the shell; the inlet of the solid-liquid separation device 2 is directly opposite to the filter plate 203 below, and the position of the inlet 216 is slightly to the right of the center of the filter plate 203, and the feed falls onto the filter plate 203. The left end of the filter plate 203 is connected to the second collecting barrel 202 through an inclined plate 205, and a collecting cover 206 is arranged below the filter plate 203. The right end of the collecting cover 206 is connected to the first collecting barrel 201 at the lower right side of the filter plate 203; the connecting rod 217 of the vibration device 204 is installed on both sides of the outer end of the filter plate 203 to the left;

[0043] A liquid outlet pipe 207 is disposed at the bottom of the first collecting barrel 201, and the liquid outlet pipe 207 is connected to the filtering device 3;

[0044] As a further preference, an outlet is provided at the bottom of the second collection barrel 202, and an automatic sealing plate is installed at the outlet, so that the waste battery fragments can be discharged for further processing. The filtering device 3 includes a filter 302 and a filtrate collection box 303; a filter membrane 302 is provided in the middle of the filter 301, and the pore size of the filter membrane 302 is 300 meshes. A filtrate discharge port is provided at the bottom end of the filtrate collection box 303, and an automatic valve is provided on the filtrate discharge pipe to collect the filtrate for further processing.

[0045] The controller is connected to the crushing device 1 , the solid-liquid separation device 2 and the filtering device 3 , and controls the start and shut down of the crushing device 1 , the solid-liquid separation device 2 and the filtering device 3 .

[0046] Example 2

[0047] like Figure 1 As shown, a system for live crushing and solid-liquid separation of used batteries includes a controller (omitted in the figure), a crushing device 1, a solid-liquid separation device 2, and a filtering device 3 connected in sequence. The crushing device 1 includes a housing 101, a feed port 102 is arranged at the center of the top of the housing 101, a collection box 106 is connected to the feed port 102, a shearing shredder 105 (the working principle and structure of the shearing shredder 105 are the same as those of the prior art) is arranged in the housing 101, and the bottom of the housing 101 is connected to a buffer box 104 through a discharge pipe 103.

[0048] The collecting box 106 and the discharge pipe 103 are funnel-shaped structures. An automatic sealing plate 107 is hinged between the bottom end of the feed port 102 and the crushing device 1 shell 101. Automatic sealing plates are hinged between the bottom end of the crushing device 1 shell 101, between the bottom end of the discharge pipe 103 and the inlet of the buffer box 104, and between the bottom end of the buffer box 104 and the inlet of the solid-liquid separation device 2. Each automatic sealing plate is connected to the controller and controlled by the controller.

[0049] The shell 101 of the crushing device 1 is a square structure, and a dry ice spray head is arranged at the top of the inside thereof. In this embodiment, two dry ice spray heads 109-1 and 109-2 are arranged at the top of the side of the shell 101. Inert gas inlets are arranged at the four corners of the bottom of the inside of the shell 101, and four inert gas inlets are arranged, namely, inert gas inlets 108-1, 108-2, 108-3, and 108-4. A first gas outlet 112 is arranged on the upper side of the right side wall of the shell 101. The dry ice spray head is a shower-type result, and the dry ice spray head is connected to the dry ice spray device through a connecting pipe to provide dry ice.

[0050] The bottom outlet of the buffer tank 104 is connected to the inlet of the solid-liquid separation device 2, and the solid-liquid separation device 2 includes a shell 209, and the first collection barrel 201, the second collection barrel 202, the filter plate 203, and the vibration device 204 are arranged in the shell 209; the lower part of the inlet of the solid-liquid separation device 2 is directly opposite to the filter plate 203, and the feed falls on the filter plate 203. The left end of the filter plate 203 is connected to the second collection barrel 202 through the inclined plate 205, and the collection cover 206 is arranged below the filter plate 203, and the right end of the collection cover 206 is connected to the first collection barrel 201 at the lower right of the filter plate 203; the vibration device 204 is installed on both sides of the outer end of the filter plate 203.

[0051] Baffles are set at the right end and front and rear sides of the filter plate 203, and filter holes are set on the bottom end surface of the filter plate 203 to separate the electrolyte; baffles are set at the front and rear sides of the inclined plate 205; baffles are set at the left end and front and rear sides of the collecting cover 206; the height of the baffle is set according to actual needs.

[0052] The shell of the solid-liquid separation device 2 is a square structure, and two dry ice spray heads 213-1 and 213-2 are arranged at the top of the shell. Inert gas inlets are arranged at the four corners of the bottom of the shell, namely inert gas inlets 212-1, 212-2, 212-3, and 212-4, and a second gas outlet 211 is arranged on the upper side of the right side wall of the shell.

[0053] The first air outlet 112 is provided with an oxygen concentration detector 110 - 1 and a smoke concentration detector 111 - 1 , and the second air outlet is provided with an oxygen concentration detector 214 and a smoke concentration detector 215 .

[0054] A movable bearing 208 and two fixed bearings 210 are arranged in the solid-liquid separation device 2, wherein one fixed bearing 210 is installed between the right outer end of the filter plate 203 and the housing, and the other fixed bearing 210 is installed on the housing 209 below the left side of the filter plate 203. The movable bearing 208 is installed at the left outer end of the filter plate 203, and the movable bearing 208 is connected to the fixed bearing 208 on the left side through a support rod, driving the left side of the filter plate 203 to move up and down. When there are fewer battery fragments, the left side of the filter plate 203 can swing up and down slightly under the drive of the vibration device 204; as the battery fragments continue to fall, the filter plate 203 will slowly tilt to the left under the action of gravity, so that the battery fragments fall into the second collection bucket through the tilting plate. The highest position of the left side of the filter plate 203 driven by the movable bearing 208 is level with the right side of the filter plate 203, and the lowest position is level with the left fixed bearing below. The fixed bearing on the left side is set to a position lower than the fixed bearing on the right side as needed.

[0055] The right end of the collecting cover 206 is connected to the first collecting barrel 201 at an angle downward, and the liquid outlet pipe 207 is arranged at the center of the bottom end surface of the first collecting barrel 201, and its bottom end surface is inclined downward toward the center, so that the liquid can enter the filter 301 as quickly as possible.

[0056] The filtering device 3 comprises a filter 301 and a filtrate collecting box 303; a filter membrane 302 is arranged in the middle of the filter 301, and the pore size of the filter membrane 302 is 400 meshes.

[0057] As a further preference, an outlet is provided at the bottom of the second collecting barrel 202, the outlet is connected to the pyrolysis furnace, and an automatic sealing plate is installed at the outlet, so that the broken pieces of waste batteries can be discharged for further processing.

[0058] The filtering device 3 comprises a filter 302 and a filtrate collecting box 303; a filter membrane 302 is arranged in the middle of the filter 301, and the pore size of the filter membrane 302 is 300 meshes. A filtrate discharge pipe is arranged at the bottom of the filtrate collecting box 303, and an automatic valve is arranged on the filtrate discharge pipe to collect the filtrate for further processing.

[0059] The controller is connected to the crushing device 1 , the solid-liquid separation device 2 and the filtering device 3 , and controls the start and shut down of the crushing device 1 , the solid-liquid separation device 2 and the filtering device 3 .

[0060] An application method of a waste battery live crushing and solid-liquid separation system comprises the following steps:

[0061] (1) Place the charged used batteries into the collecting box 106, turn on the inert gas supply device, fill the housing of the crushing device 1 with inert gas as protective gas, set the oxygen concentration threshold K and the smoke concentration threshold M detected by the oxygen concentration detector 110, 214 and the smoke concentration detector 111, 215, and start the crushing work when the detected oxygen concentration value is less than K and the smoke concentration value is less than M, and control the feed amount through the automatic sealing plate 107.

[0062] (2) The controller starts the automatic sealing plate 107, and the charged used batteries in the collection box 106 fall into the shearing shredder 105 through the feed port for shredding. The smoke concentration detector detects in real time and transmits the data to the controller. When the smoke concentration detected by the smoke concentration detector 111 is greater than M, the controller starts the dry ice spray heads 109-1 and 109-2 to continuously extinguish the fire in the shearing shredder 105; when the oxygen concentration detected by the oxygen concentration detector 110 is greater than K, the data is transmitted to the controller, and the controller starts the dry ice spray heads 109-1 and 109-2.

[0063] When the smoke concentration detected by the smoke concentration detector 215 is greater than M, the controller starts the dry ice spray heads 213-1 and 213-2 to continuously extinguish the fire in the solid-liquid separation device housing 209; when the oxygen concentration detected by the oxygen concentration detector 214 is greater than K, the data is transmitted to the controller, and the controller starts the dry ice spray heads 213-1 and 213-2.

[0064] (3) The broken waste batteries are discharged from the discharge pipe 103 and fall into the buffer box 104, and then fall onto the filter plate 203 through the outlet of the buffer box 104. At this time, the vibration device 204 generates high-frequency vibration to separate the battery fragments from the electrolyte. At the same time, the vibration device 204 causes the broken waste battery fragments to move to the left side of the filter plate 203. The electrolyte falls into the first collection barrel 201 through the collection cover 206. The battery fragments, under the action of gravity and the movable bearing 208, cause the filter plate to tilt leftward and downward, and fall into the second collection barrel 202 through the tilting plate. Then, they can be discharged to the pyrolysis furnace for further treatment at a regular time.

[0065] (4) After the electrolyte enters the first collection barrel 201 , it enters the filtering device 3 through the liquid outlet pipe 207 , and falls into the liquid collection box 303 after further separation.

[0066] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A system for live crushing and solid-liquid separation of used batteries, comprising a controller, characterized in that: It also includes a crushing device, a solid-liquid separation device and a filtering device connected in sequence; The crushing device comprises a shell, a feed port is arranged at the center of the top of the shell, the feed port is connected to the collection box, a shearing shredder is arranged in the shell, and the bottom of the shell is connected to the buffer box through a discharge pipe; The bottom outlet of the buffer tank is connected to the inlet of a solid-liquid separation device, and the solid-liquid separation device comprises a shell, the shell is provided with an inlet, and a first collecting barrel, a second collecting barrel, a filter plate, and a vibration device are arranged in the shell; The inlet of the solid-liquid separation device is directly opposite to the filter plate, and the inlet is located on the right side of the filter plate; the left end of the filter plate is connected to the second collection barrel through the inclined plate, and a collection cover is arranged below the filter plate, and the right end of the collection cover is connected to the first collection barrel below the right side of the filter plate; the vibration device is installed below the filter plate and connected to the filter plate through a connecting rod, and the connecting rod is fixed to both sides of the left outer end of the filter plate; A liquid outlet pipe is provided at the bottom end of the first collecting barrel, and the liquid outlet pipe is connected to a filtering device; The controller is connected to the crushing device, the solid-liquid separation device and the filtering device, and controls the start and shut down of the crushing device, the solid-liquid separation device and the filtering device.

2. A system for live crushing and solid-liquid separation of used batteries according to claim 1, characterized in that: The collecting box and the discharge pipe are of funnel-shaped structure, and automatic sealing plates are hinged between the bottom end of the feed port and the crushing device shell, between the bottom end of the crushing device shell, between the bottom end of the discharge pipe and the buffer box inlet, and between the bottom end of the buffer box and the solid-liquid separation device inlet. Each automatic sealing plate is connected to the controller and controlled by the controller.

3. A system for live crushing and solid-liquid separation of used batteries according to claim 1, characterized in that: The shell of the crushing device is a square structure, a dry ice spray head is arranged at the top of the interior, inert gas inlets are arranged at the four corners of the bottom of the interior, and a first air outlet is arranged on the upper side of the shell side wall; the outer shell of the solid-liquid separation device is a square structure, a dry ice spray head is arranged at the top of the interior, inert gas inlets are arranged at the four corners of the bottom of the interior, and a second air outlet is arranged on the upper side of the shell side wall; the dry ice spray head is connected to the dry ice spray device through a connecting pipe.

4. A system for live crushing and solid-liquid separation of used batteries according to claim 3, characterized in that: Oxygen concentration detectors are arranged at the first gas outlet and the second gas outlet.

5. A system for live crushing and solid-liquid separation of used batteries according to claim 4, characterized in that: Smoke concentration detectors are arranged at the first air outlet and the second air outlet.

6. A system for live crushing and solid-liquid separation of used batteries according to claim 3, characterized in that: Each inert gas inlet is connected to an inert gas supply device through an inlet pipe.

7. A system for live crushing and solid-liquid separation of used batteries according to claim 1, characterized in that: Baffles are arranged on the right end and front and rear sides of the filter plate, and filter holes are arranged on the bottom surface of the filter plate; baffles are arranged on the front and rear sides of the inclined plate; baffles are arranged on the left end and front and rear sides of the collecting cover, and the right end of the collecting cover is tilted downward to connect to the first collecting barrel, and the liquid outlet pipe is arranged in the center of the bottom surface of the first collecting barrel, and its bottom end faces tilt downward toward the center.

8. A system for live crushing and solid-liquid separation of used batteries according to claim 1, characterized in that: A movable bearing and two fixed bearings are arranged in the solid-liquid separation device, wherein one of the fixed bearings is installed between the right outer end of the filter plate and the outer shell, and the other fixed bearing is installed on the outer shell below the left side of the filter plate. The movable bearing is installed on the left outer end of the filter plate, and the movable bearing is connected to the fixed bearing on the left side through a support rod, driving the left side of the filter plate to move up and down. Under the action of gravity, the filter plate slowly tilts to the left, so that the battery fragments fall into the second collection bucket through the inclined plate.

9. A system for live crushing and solid-liquid separation of used batteries according to claim 1, characterized in that: The filtering device comprises a filter and a filtrate collecting box; a filter membrane is arranged in the middle of the filter, and the pore size of the filter membrane is 300-600 meshes.

10. The application method of the system for live crushing and solid-liquid separation of used batteries according to any one of claims 1 to 9, characterized in that: The steps include: (1) Place the charged waste batteries into the collection box, turn on the inert gas supply device, fill the crushing device housing with inert gas as protective gas, set the oxygen concentration threshold K and smoke concentration threshold M detected by the oxygen concentration detector and the smoke concentration detector, and start the crushing work when the detected oxygen concentration value is less than K and the smoke concentration value is less than M, and control the feed amount through the automatic sealing plate; (2) The controller starts the automatic sealing plate, and the charged used batteries in the collection box fall into the shear shredder through the feed port for shredding. The smoke detector detects in real time and transmits the data to the controller. When the smoke concentration is greater than M, the controller starts the dry ice spray head to continuously extinguish the fire in the shear shredder. The oxygen concentration detector detects in real time and transmits data to the controller. If the oxygen concentration is greater than K, the controller starts the dry ice spray head; (3) The broken waste batteries are discharged from the discharge pipe and fall into the buffer box, and then fall onto the filter plate through the outlet of the buffer box. At this time, the vibration device generates high-frequency vibration to separate the battery fragments from the electrolyte. The electrolyte falls into the first collection bucket through the collection cover, and the battery fragments tilt the filter plate to the left under the action of gravity and the movable bearing, and fall into the second collection bucket through the tilting plate; (4) After the electrolyte enters the first collection barrel, it enters the filtering device through the liquid outlet pipe and falls into the liquid collection box after further separation.

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