Charged recovery system for waste lithium batteries

Abstract

The invention discloses a waste lithium battery electrified recovery system, and relates to the field of waste lithium battery recovery, the waste lithium battery electrified recovery system comprises a flame detection system, a temperature monitoring system, an oxygen content monitoring system and a primary double-shaft shredding machine, and further comprises a nitrogen charging system used for charging nitrogen into the primary double-shaft shredding machine; the explosion venting assembly is arranged on one side of the first-stage double-shaft shredder shell and can discharge impact force gas generated by battery explosion to the outside of the box body; the explosion venting assembly comprises an explosion venting cylinder which is arranged on one side of the first-stage double-shaft shredding machine shell; when a flame detection system detects flames, the parallel four-connecting-rod mechanism is controlled to enable the limiting relieving piece to relieve limiting of the limiting block and the sliding limiting piece, under the guiding effect of the guide column and the elastic force effect of the free spring, the explosion venting frame moves towards the side away from the explosion venting barrel, and therefore the explosion venting frame is opened, and active explosion venting is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of waste lithium battery recycling, and in particular to a system for recycling charged waste lithium batteries. Background Art

[0002] With the rise of the new energy industry, more and more waste lithium batteries have become new household garbage. Waste lithium batteries cannot degrade by themselves, causing pollution to the environment. In addition, waste lithium batteries contain a variety of valuable metal components. Therefore, the recycling and reuse of waste lithium batteries has very important environmental and economic significance. The recycling of waste lithium batteries has also become a research hotspot in the field of resource recovery. When waste lithium batteries are charged and crushed, they will heat up, catch fire or even explode, causing serious safety hazards.

[0003] At present, most lithium batteries are broken after being discharged. The conventional discharge method is generally to use salt water immersion discharge or pinhole puncture discharge. The salt water immersion discharge cycle is long, generally taking about a week, and there is no way to guarantee that the waste lithium batteries are completely discharged. There is still a high risk in the subsequent crushing process. With the rapid development of new energy lithium batteries, lithium battery leakage protection technology is getting higher and higher, and the salt water immersion discharge method is no longer suitable. Pinhole puncture discharge is to penetrate the lithium battery shell with a steel needle to short-circuit the positive and negative poles of the lithium battery and discharge. This method is very likely to cause the explosion of waste lithium batteries.

[0004] The Chinese patent with the publication number CN218568962U discloses an integrated device for shredding and crushing waste lithium batteries, including a shredder, a crusher, and also includes a front oxygen-insulated intermediate cabin, a shredding cabin, a crushing cabin, and a rear oxygen-insulated intermediate cabin; the front oxygen-insulated intermediate cabin, the shredding cabin, the crushing cabin, and the rear oxygen-insulated intermediate cabin are arranged in sequence from top to bottom and are connected in sequence; the shredding cabin and the crushing cabin are provided with a first exhaust pipe; the first exhaust pipe is used to keep the shredding cabin and the crushing cabin under negative pressure. The above-mentioned cabins are arranged from top to bottom, and the materials can be automatically discharged based on their own weight without the need for complicated conveying mechanisms. The above-mentioned cabins can be isolated and protected with nitrogen. In particular, the shredding cabin and the crushing cabin are also under negative pressure when working. On the one hand, the oxygen content is reduced, which is safer. On the other hand, the negative pressure can take away the volatile organic solvent of the electrolyte, reduce the material temperature, and ensure the safety and reliability of live disassembly.

[0005] Although the above device can achieve live crushing, during its actual use, if the oxygen concentration is not controlled in time, it is still easy to cause an explosion, and the above device cannot vent the explosion.

[0006] Therefore, it is necessary for the present invention to propose a system for recycling charged waste lithium batteries to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a system for recycling charged waste lithium batteries to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: a system for recycling live waste lithium batteries, comprising a flame detection system, a temperature monitoring system, an oxygen content monitoring system and a primary double-shaft shredder, and also comprising a nitrogen filling system for filling nitrogen into the primary double-shaft shredder; An explosion relief component is placed on one side of the first-stage double-shaft shredder housing and is capable of discharging the impact gas generated by the battery explosion to the outside of the housing; The explosion relief assembly includes an explosion relief cylinder, which is placed on one side of the primary double-shaft shredder housing; A parallel four-bar linkage mechanism is placed on the inner wall of the explosion-proof tube, comprising a vertical frame fixedly connected to the explosion-proof tube, cranks are hinged at both ends of the frame, a connecting rod is hinged between the two cranks, the center point of the hinge between the crank at the lower part and the frame is connected to the driving mechanism through a rotating shaft passing through the explosion-proof tube, and the crank at the upper part is composed of a fixed-length connecting rod and a pneumatic telescopic rod; A limit block connected to one side of the bottom of the connecting rod via a sliding reset assembly; An explosion relief frame, the four corners of which are movably connected to the explosion relief tube via guide pillars and free springs; A sliding limiter, which is reset and slidably connected to the explosion relief frame, and one end of which is away from the explosion relief frame is limitedly matched with a limit block; A sealing guide frame, which is placed on the side of the explosion relief frame opposite to the explosion relief tube; An explosion relief plate is disposed on the inner wall of the sealing guide frame and is sealingly and slidably connected to the sealing guide frame via a return spring; A limit release member, which is placed on the side of the explosion relief plate away from the explosion relief frame and is used to release the limit of the limit block and the sliding limit member; The extrusion rod is arranged on one side of the connecting rod and is used to push the explosion relief plate to move.

[0009] Preferably, it also includes a tower-type steel structure, which is provided with a feed hopper, a first-level gate valve, a feed sealing cabin, a second-level gate valve, a second-level double-shaft shredder, a discharge hopper, a third-level gate valve, a discharge buffer sealing cabin, and a fourth-level gate valve in sequence from top to bottom.

[0010] Preferably, the sliding reset assembly comprises a sliding column which slides with and penetrates the connecting rod, and a reset spring is disposed on an outer sleeve of the sliding column. One end of the reset spring is connected to the connecting rod, and the other end is connected to the limit block.

[0011] Preferably, one end of the guide column is connected to the explosion-proof frame, and the other end passes through the explosion-proof tube, the end passing through the explosion-proof tube is connected to a free spring, and the end passing through the explosion-proof tube is threadedly connected to a nut.

[0012] Preferably, a limiting sliding groove slidably matched with the sliding limiting member is provided on the explosion relief frame, and the sliding limiting member is connected to the inner wall of the limiting sliding groove via a return spring.

[0013] Preferably, the explosion relief frame comprises a plate body, and elastic sealing layers are arranged around the plate body.

[0014] Preferably, the explosion relief cylinder comprises a cylinder body, which is connected to the housing of the first-stage double-shaft shredder; Two flange parts are respectively arranged at two ends of the cylinder body and are respectively used to be connected with the primary double-shaft shredder housing and the explosion relief frame.

[0015] Preferably, the limiting block comprises a limiting body, a wedge-shaped groove is formed at the bottom of the limiting body, and a wedge-shaped surface is formed at the top of the limiting body on a side opposite to the sliding limiting member.

[0016] Preferably, the sliding limiter comprises a “T”-shaped slide bar, and a limit protrusion cooperating with the limit body is provided at the top of one end of the “T”-shaped slide bar away from the explosion-proof frame.

[0017] Preferably, the limit release member comprises an extension portion, one end of which is connected to the explosion relief plate, and the other end of which is provided with a wedge-shaped block that cooperates with the wedge-shaped groove.

[0018] Technical effects and advantages of the present invention: 1. The present invention cooperates with each other among the parallel four-bar linkage, the rotating shaft, the driving mechanism, the limit block, the explosion relief frame, the sliding limit piece, the explosion relief plate and the limit release piece. The driving mechanism will drive the lower crank to rotate, and the connecting rod that always keeps a vertical state will rotate downward. The downward rotation of the connecting rod will drive the limit block to rotate. The rotation of the limit block will push the sliding limit piece to slide downward on one side and drive the sliding limit piece to slide toward the first-level double-shaft shredder on the other side. The sliding of the explosion relief frame will move toward the port of the explosion relief cylinder and block the end of the explosion relief cylinder, thereby realizing the sealing of the explosion relief cylinder.

[0019] 2. The present invention cooperates with each other among a parallel four-bar linkage, a rotating shaft, a driving mechanism, a limit block, an explosion relief frame, a sliding limit piece, an explosion relief plate and a limit release piece. During a normal crushing process, the driving mechanism of one of the parallel four-bar linkages is controlled to work, so that the driving mechanism is reversed until the connecting rod is in an initial position, and then the pneumatic telescopic rod is controlled to be repeatedly extended and retracted, thereby pushing the explosion relief plate to slide toward the explosion relief frame. The movement of the explosion relief plate will drive the internal airflow, thereby mixing the internal nitrogen and oxygen, and avoiding the occurrence of explosions caused by high local oxygen content.

[0020] 3. The present invention cooperates with each other among the parallel four-bar linkage, the rotating shaft, the driving mechanism, the limit block, the explosion relief frame, the sliding limit member, the explosion relief plate and the limit release member. When the flame detection system detects a flame, the pneumatic telescopic rod that has been in a repeatedly telescopic state is controlled to quickly extend to a preset length. The extension of the pneumatic telescopic rod will push the connecting rod to greatly deflect toward the explosion relief plate around the hinge center of the lower crank, so that the limit release member releases the limit on the limit block and the sliding limit member. Under the guiding action of the guide column and the elastic force of the free spring, the explosion relief frame will move to the side away from the explosion relief tube, so that the explosion relief frame will be opened, thereby realizing active explosion relief.

[0021] 4. The present invention cooperates with each other among the parallel four-bar linkage, the rotating shaft, the driving mechanism, the limit block, the explosion relief frame, the sliding limit member, the explosion relief plate and the limit release member. When the flame detection system detects a flame and the active explosion relief is not started, the air pressure generated by the explosion will push the explosion relief plate to slide toward the explosion relief frame, thereby releasing the limit of the limit block and the sliding limit member by the limit release member. Under the guiding action of the guide column and the elastic force of the free spring, the explosion relief frame is opened, thereby realizing passive explosion relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the recovery system of the present invention.

[0023] Figure 2 It is a front view of the explosion relief assembly of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the explosion relief assembly in the present invention.

[0025] Figure 4 It is a schematic diagram of the explosion relief assembly in the present invention from another angle.

[0026] Figure 5 It is a schematic diagram of the connection structure of the explosion venting frame and the explosion venting plate in the present invention.

[0027] Figure 6 For the present invention Figure 5 Exploded view of structural parts.

[0028] Figure 7 It is a schematic diagram of the parallel four-bar linkage mechanism in the present invention.

[0029] Figure 8 It is a cross-sectional view of the explosion relief assembly structure when the explosion relief frame is in a closed state in the present invention.

[0030] Fig. 9 It is a schematic diagram of the position of the parallel four-bar linkage mechanism when the explosion relief frame is in a closed state in the present invention.

[0031] Fig.10It is a schematic diagram of the connection between the parallel four-bar linkage and the sliding limiter structure in the present invention.

[0032] Fig.11 It is a schematic diagram of the coordination structure of the limit block and the limit release member in the present invention.

[0033] Fig.12 It is a schematic diagram showing that one of the parallel four-bar linkages is in an initial position when the explosion relief frame is in an open state in the present invention.

[0034] Fig.13 It is a schematic diagram showing that one of the parallel four-bar linkages is in an initial position when the explosion relief frame is in a closed state in the present invention.

[0035] Fig.14 It is a schematic diagram of the wedge surface structure of the limiting block in the present invention.

[0036] In the figure: 1. a first-stage double-shaft shredder; 2. an explosion relief assembly; 201. an explosion relief cylinder; 2011. a cylinder; 2012. a flange; 202. a parallel four-bar linkage; 2021. a frame; 2022. a crank; 2023. a connecting rod; 203. a rotating shaft; 204. a driving mechanism; 205. a fixed-length connecting rod; 206. a pneumatic telescopic rod; 207. a stop block; 2071. a stop body; 2072. a wedge-shaped groove; 2073. a wedge-shaped surface; 208. a sliding reset assembly; 209. an explosion relief frame; 2091. a plate; 2092. an elastic Sealing layer; 210, guide column; 211, free spring; 212, sliding limiter; 2121, "T"-shaped slide bar; 2122, limiter protrusion; 213, sealing guide frame; 214, explosion relief plate; 215, limiter release member; 2151, extension; 2152, wedge block; 216, extrusion rod; 3, tower-type steel structure; 4, feed hopper; 5, first-level gate valve; 6, feed sealing cabin; 7, second-level gate valve; 8, second-level double-axis shredder; 9, discharge hopper; 10, third-level gate valve; 11, discharge buffer sealing cabin; 12, fourth-level gate valve. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention provides Figures 1 to 14A waste lithium battery charged recovery system shown in the figure includes a flame detection system, a temperature monitoring system, an oxygen content monitoring system and a primary double-shaft shredder 1, and also includes a nitrogen filling system, which is used to fill nitrogen into the primary double-shaft shredder 1; the present invention is used to monitor the flame, temperature and oxygen content inside the crushing and recovery system by setting a flame detection system, a temperature monitoring system and an oxygen content monitoring system.

[0039] The explosion relief assembly 2 is disposed on one side of the casing of the first-stage double-shaft shredder 1 and can discharge the impact gas generated by the battery explosion to the outside of the casing, thereby preventing the system from being damaged by the excessive impact gas.

[0040] The explosion relief assembly 2 includes an explosion relief tube 201 connected to the primary double-shaft shredder 1 and disposed on one side of the housing of the primary double-shaft shredder 1 . The present invention achieves communication with the interior of the primary double-shaft shredder 1 by providing the explosion relief tube 201 .

[0041] Specifically, the explosion relief cylinder 201 includes a cylinder body 2011 , which is connected to the outer shell of the first-stage double-shaft shredder 1 .

[0042] Two flanges 2012 are respectively disposed at both ends of the cylinder 2011, and are respectively used to connect with the shell of the first-stage double-shaft shredder 1 and the explosion relief frame 209. The present invention realizes the connection between the explosion relief cylinder 201 and the first-stage double-shaft shredder 1 by providing two flanges 2012, one of which is connected with the shell of the first-stage double-shaft shredder 1 by bolts; and the other is connected with the explosion relief frame 209.

[0043] A parallel four-bar linkage 202 is placed on the inner wall of the explosion-proof tube 201, and includes a vertical frame 2021 fixedly connected to the explosion-proof tube 201, with cranks 2022 hinged at both ends of the frame 2021, and a connecting rod 2023 hinged between the two cranks 2022. The center point at which the lower crank 2022 is hinged to the frame 2021 is transmission-connected to the driving mechanism 204 through a rotating shaft 203 that passes through the explosion-proof tube 201, and the upper crank 2022 is composed of a fixed-length connecting rod 205 and a pneumatic telescopic rod 206.

[0044] like Fig.12As shown, at the initial position, there is an explosion-proof gap between the explosion-proof frame 209 and the explosion-proof tube 201, that is, the explosion-proof frame 209 is in an open state, and its free spring 211 is in a free extension state, and at this time the limit block 207 and the sliding limit member 212 are limited and matched; the present invention sets a parallel four-bar linkage 202, and controls the operation of the driving mechanism 204. The operation of the driving mechanism 204 will drive the rotating shaft 203 to rotate toward the primary double-shaft shredder 1, and the rotation of the rotating shaft 203 will drive the lower crank 2022 to rotate, and the rotation of the lower crank 2022 will drive the connecting rod 2 which always remains in a vertical state. 023 rotates downward, and the downward rotation of the connecting rod 2023 will drive the limit block 207 to rotate. The rotation of the limit block 207 will push the sliding limit member 212 to slide downward on one side, and drive the sliding limit member 212 to slide toward the first-level double-axis shredder 1 on the other side. Due to the setting of the guide column 210, the sliding limit member 212 slides toward the first-level double-axis shredder 1 and will drive the explosion-proof frame 209 to slide horizontally toward the first-level double-axis shredder 1 after overcoming the pulling force of the free spring 211. The sliding of the explosion-proof frame 209 will move toward the port of the explosion-proof tube 201 and block the end of the explosion-proof tube 201, thereby achieving the sealing of the explosion-proof tube 201.

[0045] The limit block 207 is connected to one side of the bottom of the connecting rod 2023 through a sliding reset assembly 208. The present invention provides the sliding reset assembly 208 so that after the limit block 207 and the sliding limit member 212 are unlocked, they can be reset under the action of the sliding reset assembly 208.

[0046] Specifically, the sliding reset assembly 208 includes a sliding column that slides with and penetrates the connecting rod 2023, and a reset spring is disposed on the sliding column outer sleeve, one end of the reset spring is connected to the connecting rod 2023, and the other end is connected to the limit block 207. Under the elastic force of the reset spring, the limit block 207 is driven to slide toward the connecting rod 2023 to achieve the reset of the limit block 207.

[0047] Furthermore, the limiting block 207 includes a limiting body 2071 , and a wedge-shaped groove 2072 is formed at the bottom of the limiting body 2071 .

[0048] Further, such as Fig.14 As shown, a wedge-shaped surface 2073 is formed on the top of the limiting body 2071 and on the side opposite to the sliding limiting member 212 .

[0049] The present invention sets a wedge-shaped surface 2073. After explosion relief, the driving mechanism 204 is controlled to reverse, so that the wedge-shaped surface 2073 will come into contact with the lower part of the sliding limit member 212. Continuing to rotate will cause the limit block 207 to slide to the side away from the sliding limit member 212, thereby enabling the limit block 207 to be misaligned with the sliding limit member 212, and then the driving mechanism 204 can drive the limit block 207 to reverse to the top of the sliding limit member 212, thereby achieving resetting.

[0050] The explosion relief frame 209 has four corners movably connected to the explosion relief tube 201 through guide pillars 210 and free springs 211. The present invention realizes explosion relief by setting the explosion relief frame 209 and controlling the opening and closing of the explosion relief frame 209.

[0051] Specifically, one end of the guide column 210 is connected to the explosion relief frame 209, and the other end passes through the explosion relief tube 201. The end passing through the explosion relief tube 201 is connected to a free spring 211, and the end passing through the explosion relief tube 201 is threadedly connected to a nut. The present invention provides the guide column 210 to guide the explosion relief frame 209. The present invention provides the free spring 211 to reset the explosion relief frame 209.

[0052] Furthermore, the explosion relief frame 209 includes a plate body 2091, and elastic sealing layers 2092 are arranged around the plate body 2091. The present invention achieves sealing between the explosion relief frame 209 and the explosion relief tube 201 by providing the elastic sealing layer 2092.

[0053] The sliding limiter 212 is connected to the explosion relief frame 209 in a resetting and sliding manner, and one end of the sliding limiter 212 away from the explosion relief frame 209 is limitedly matched with the limit block 207. The present invention provides the sliding limiter 212, which is used to cooperate with the limit block 207 to achieve the limit.

[0054] Specifically, a limiting slot is provided on the explosion relief frame 209 to slide with the sliding limiting member 212, and the sliding limiting member 212 is connected to the inner wall of the limiting slot via a reset spring. The present invention realizes the sliding connection between the sliding limiting member 212 and the explosion relief frame 209 by providing the limiting slot; and realizes the reset of the sliding limiting member 212 by providing the reset spring.

[0055] Furthermore, the sliding limiter 212 includes a “T”-shaped slide bar 2121 , and a limit protrusion 2122 cooperating with the limiter body 2071 is disposed on the top of one end of the “T”-shaped slide bar 2121 away from the explosion relief frame 209 .

[0056] The sealing guide frame 213 is disposed on the side of the explosion relief frame 209 opposite to the explosion relief tube 201 . The present invention provides the sealing guide frame 213 to guide the explosion relief plate 214 .

[0057] The explosion relief plate 214 is placed on the inner wall of the sealing guide frame 213 and is sealingly and slidably connected to the sealing guide frame 213 through a reset spring. The present invention sets the explosion relief plate 214. On the one hand, the parallel four-bar linkage 202 is controlled to squeeze the explosion relief plate 214, thereby driving the gas flow inside the first-stage double-axis shredder 1, so that the internal nitrogen and oxygen are evenly mixed, thereby avoiding the occurrence of explosion caused by high local oxygen content. On the other hand, during an explosion, the fluctuation of the explosion pressure will push the explosion relief plate 214 to move outward, and the movement of the explosion relief plate 214 will drive the limit release member 215 to unlock the sliding limit member 212 and the limit block 207, thereby realizing passive explosion relief.

[0058] The limit release member 215 is disposed on the side of the explosion relief plate 214 away from the explosion relief frame 209 , and is used to release the limit of the limit block 207 and the sliding limit member 212 .

[0059] The present invention provides a limit release member 215. On the one hand, it can control the parallel four-bar linkage 202 to push the explosion relief plate 214 to move. The movement of the explosion relief plate 214 will drive the limit release member 215 to unlock the sliding limit member 212 and the limit block 207, thereby realizing active explosion relief.

[0060] Specifically, the limit release member 215 includes an extension portion 2151 , one end of the extension portion 2151 is connected to the explosion relief plate 214 , and the other end is connected to a wedge block 2152 that cooperates with the wedge groove 2072 .

[0061] The extrusion rod 216 is disposed on one side of the connecting rod 2023 and is used to push the explosion relief plate 214 to move.

[0062] It also includes a tower-type steel structure 3, on which a feed hopper 4, a first-level gate valve 5, a feed sealing cabin 6, a second-level gate valve 7, a first-level double-shaft shredder 1, a second-level double-shaft shredder 8, a discharge hopper 9, a third-level gate valve 10, a discharge buffer sealing cabin 11, and a fourth-level gate valve 12 are arranged from top to bottom.

[0063] First, by controlling the operation of the driving mechanism 204, the operation of the driving mechanism 204 will drive the rotating shaft 203 to rotate toward the primary double-shaft shredder 1. The rotation of the rotating shaft 203 will drive the lower crank 2022 to rotate. The rotation of the lower crank 2022 will drive the connecting rod 2023, which is always kept in a vertical state, to rotate downward. The downward rotation of the connecting rod 2023 will drive the limit block 207 to rotate. The rotation of the limit block 207 will push the sliding limit member 212 to slide downward on one side, and drive the sliding limit member 212 to slide toward the primary double-shaft shredder 1 on the other side. Due to the setting of the guide column 210, the sliding of the sliding limit member 212 toward the primary double-shaft shredder 1 will drive the explosion-proof frame 209 to slide horizontally toward the primary double-shaft shredder 1 after overcoming the pulling force of the free spring 211. The sliding of the explosion-proof frame 209 will move toward the port of the explosion-proof tube 201 and block the end of the explosion-proof tube 201, thereby achieving the sealing of the explosion-proof tube 201.

[0064] Then, the waste lithium batteries are fed into the feed hopper 4 above the first-level gate valve 5 through the feed belt conveyor. Through intelligent full-automatic control, the first-level gate valve 5 is controlled to open, so that the waste lithium batteries enter the feed sealed cabin 6. Then, the first-level gate valve 5 is controlled to be closed, the second-level gate valve 7 is opened, and the third-level gate valve 10 is opened. The waste lithium batteries enter the first-level double-shaft shredder 1 for shredding, and then enter the second-level double-shaft shredder 8 for shredding. The shredded lithium batteries enter the discharge buffer sealed cabin 11 for temporary storage. Finally, the third-level gate valve 10 is controlled to be closed and the fourth-level gate valve 12 is opened.

[0065] The present invention also includes a fire fighting system, a flame detection system and a temperature monitoring system to monitor the flame and temperature in the crushing cavity in real time. Once the flame or temperature rises abnormally, the fire fighting system is automatically started immediately to extinguish the fire and prevent flash explosion.

[0066] During the intelligent and automatic operation of the entire system, the crushing chamber, the feed sealed cabin 6 and the discharge buffer sealed cabin 11 are all protected by nitrogen filling through the nitrogen filling port on the side wall. The oxygen content is automatically controlled by the oxygen content monitoring system to be within 4% before crushing to prevent the ignition or flash explosion of the charged waste lithium batteries. The gas generated during the crushing process enters the exhaust gas treatment system for treatment to prevent the exhaust gas from causing secondary pollution to the environment. At the same time, during the crushing process, when the flame detection system detects a flame, it actively vents the explosion by controlling the explosion venting component 2, and the fire protection system is automatically started immediately to extinguish the fire to prevent continuous flash explosions and ensure the safe and stable operation of the equipment.

[0067] During the normal crushing process, by controlling the driving mechanism 204 of one of the parallel four-bar linkages 202 to work, the driving mechanism 204 is reversed until the connecting rod 2023 is in the initial position. The reversal of the driving mechanism 204 will drive the connecting rod 2023 corresponding to the parallel four-bar linkage 202 to rotate upward to the initial position while maintaining a vertical state, and then the pneumatic telescopic rod 206 is controlled to repeatedly extend and retract. The extension of the pneumatic telescopic rod 206 will push the connecting rod 2023 to rotate around the hinge center with the lower crank 2022 toward the explosion relief plate 214, thereby pushing the explosion relief plate 214 to slide toward the explosion relief frame 209. The movement of the explosion relief plate 214 will drive the internal airflow to flow, thereby mixing the internal nitrogen and oxygen, and avoiding the occurrence of explosions caused by high local oxygen content.

[0068] When the flame detection system detects a flame, the pneumatic telescopic rod 206, which has been in a repeatedly telescopic state, is controlled to quickly extend a preset length. The extension of the pneumatic telescopic rod 206 pushes the connecting rod 2023 to deflect greatly toward the explosion venting plate 214 around the hinge center of the lower crank 222, so that the extrusion rod 216 pushes the explosion venting plate 214 to slide toward the explosion venting frame 209 to the limit release position of the limit release member 215 on the limit block 207 and the sliding limit member 212. When the wedge block 2152 on the limit release member 215 abuts against the wedge groove 2072 During the contact process, under the action of the wedge block 2152, the limit block 207 will be pushed to move toward the edge of the explosion relief frame 209, and finally the limit block 207 will slide to the position separated from the sliding limit member 212. Since the limit block 207 and the sliding limit member 212 are separated, the sliding limit member 212 is no longer limited, that is, the limit of the explosion relief frame 209 is released, and under the guiding action of the guide column 210 and the elastic force of the free spring 211, the explosion relief frame 209 will move to the side away from the explosion relief tube 201, so that the explosion relief frame 209 is opened, and then the active explosion relief is realized.

[0069] At the same time, during the movement of the explosion relief plate 214, negative pressure will be formed inside, so that a large amount of nitrogen will be sucked into the crushing chamber, reducing the oxygen content, thereby avoiding the occurrence of continuous flash explosions.

[0070] When the flame detection system detects a flame and the active explosion relief is not activated, the air pressure generated by the explosion will push the explosion relief plate 214 to slide toward the explosion relief frame 209. When the explosion relief frame 209 slides to the point where the wedge block 2152 of the limit release member 215 conflicts with the wedge groove 2072, the explosion pressure continues to push the limit block 207 to move toward the edge of the explosion relief frame 209 under the action of the wedge block 2152, and finally the limit block 207 slides to a position separated from the sliding limit member 212. Since the limit block 207 is separated from the sliding limit member 212, the sliding limit member 212 is no longer limited, that is, the explosion relief frame 209 is released from the limit. Under the guiding action of the guide column 210 and the elastic force of the free spring 211, the explosion relief frame 209 will move to the side away from the explosion relief tube 201, thereby opening the explosion relief frame 209 and realizing passive explosion relief.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste lithium battery live recycling system, comprising a flame detection system, a temperature monitoring system, an oxygen content monitoring system and a primary double-shaft shredder, characterized in that: Also included is a nitrogen charging system for charging nitrogen into the first-stage double-shaft shredder; An explosion relief component is placed on one side of the first-stage double-shaft shredder housing and is capable of discharging the impact gas generated by the battery explosion to the outside of the housing; The explosion relief assembly includes an explosion relief cylinder, which is placed on one side of the primary double-shaft shredder housing; A parallel four-bar linkage mechanism is placed on the inner wall of the explosion-proof tube, comprising a vertical frame fixedly connected to the explosion-proof tube, cranks are hinged at both ends of the frame, a connecting rod is hinged between the two cranks, the center point of the hinge between the crank at the lower part and the frame is connected to the driving mechanism through a rotating shaft passing through the explosion-proof tube, and the crank at the upper part is composed of a fixed-length connecting rod and a pneumatic telescopic rod; A limit block connected to one side of the bottom of the connecting rod via a sliding reset assembly; An explosion relief frame, the four corners of which are movably connected to the explosion relief tube via guide pillars and free springs; A sliding limiter, which is reset and slidably connected to the explosion relief frame, and one end of which is away from the explosion relief frame is limitedly matched with a limit block; A sealing guide frame, which is placed on the side of the explosion relief frame opposite to the explosion relief tube; An explosion relief plate is disposed on the inner wall of the sealing guide frame and is sealingly and slidably connected to the sealing guide frame via a return spring; A limit release member, which is placed on the side of the explosion relief plate away from the explosion relief frame and is used to release the limit of the limit block and the sliding limit member; The extrusion rod is arranged on one side of the connecting rod and is used to push the explosion relief plate to move.

2. A waste lithium battery charged recycling system according to claim 1, characterized in that: It also includes a tower-type steel structure, which is provided with a feed hopper, a first-level gate valve, a feed sealing cabin, a second-level gate valve, a second-level double-shaft shredder, a discharge hopper, a third-level gate valve, a discharge buffer sealing cabin, and a fourth-level gate valve in sequence from top to bottom.

3. A waste lithium battery charged recycling system according to claim 1, characterized in that: The sliding reset assembly comprises a sliding column which slides with and penetrates the connecting rod, and a reset spring is arranged on the outer sleeve of the sliding column. One end of the reset spring is connected to the connecting rod, and the other end is connected to the limit block.

4. A waste lithium battery charged recycling system according to claim 1, characterized in that: One end of the guide column is connected to the explosion relief frame, and the other end passes through the explosion relief tube. The end passing through the explosion relief tube is connected to a free spring, and the end passing through the explosion relief tube is threadedly connected to a nut.

5. A waste lithium battery charged recycling system according to claim 1, characterized in that: The explosion relief frame is provided with a limiting sliding groove which is slidably matched with the sliding limiting member, and the sliding limiting member is connected to the inner wall of the limiting sliding groove through a reset spring.

6. A waste lithium battery charged recycling system according to claim 1, characterized in that: The explosion relief frame comprises a plate body, and elastic sealing layers are arranged around the plate body.

7. A waste lithium battery charged recycling system according to claim 1, characterized in that: The explosion relief cylinder comprises a cylinder body, which is connected to the shell of the first-stage double-shaft shredder; Two flange parts are respectively arranged at two ends of the cylinder body and are respectively used to be connected with the primary double-shaft shredder housing and the explosion relief frame.

8. A system for recycling live waste lithium batteries according to claim 1, characterized in that: The limiting block comprises a limiting body, a wedge-shaped groove is provided at the bottom of the limiting body, and a wedge-shaped surface is provided at the top of the limiting body on a side opposite to the sliding limiting piece.

9. A system for recycling live waste lithium batteries according to claim 1, characterized in that: The sliding limiter comprises a "T"-shaped slide bar, and a limit protrusion cooperating with the limiter body is provided at the top of one end of the "T"-shaped slide bar away from the explosion relief frame.

10. A system for recycling charged waste lithium batteries according to claim 8, characterized in that: The limit release member comprises an extension portion, one end of which is connected to the explosion relief plate, and the other end of which is connected to a wedge-shaped block matched with the wedge-shaped groove.

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