A magnetic foreign matter removing device for a negative electrode material of an automobile lithium battery and a removing method thereof

Abstract

The application discloses a magnetic foreign matter removing device for automobile lithium battery negative electrode material and a removing method thereof, and belongs to the technical field of lithium battery negative electrode material processing. The magnetic foreign matter removing device for automobile lithium battery negative electrode material comprises a base, the top of the base is fixedly connected with a conveying belt device, the rear top of the conveying belt device is fixedly connected with a feeding port, the inside of the feeding port is movably connected with a crushing roller, and the front and rear top of the conveying belt device is movably connected with a primary magnetic attraction roller and a secondary magnetic attraction roller respectively. When the weight of the negative electrode material on the uniform material groove increases, the motor is started, the uniform material groove is driven to rotate downward, the broken block is driven to move back and forth, the negative electrode material in the uniform material groove is crushed more finely, the negative electrode material is laid on the conveying belt device more evenly, and the subsequent magnetic attraction process is more efficient.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery anode material processing technology, specifically relating to a magnetic foreign matter removal device and method for automotive lithium battery anode materials. Background Technology

[0002] Lithium-ion battery anode materials are key materials used to store and release lithium ions in lithium-ion batteries, directly affecting the battery's capacity, cycle life, and safety. Currently, the most widely used commercial anode materials are graphite-based, including natural and artificial graphite. Among them, artificial graphite is superior in terms of cycle life, safety, and rate performance, and accounted for more than 90% of anode material shipments in the first half of 2025. However, some magnetic foreign matter may be present during the production process of anode materials, which requires the removal of magnetic foreign matter.

[0003] Chinese invention patent CN122032740A discloses a magnetic separation device for purifying electronic-grade basic quartz sand. The device includes a horizontal conveyor belt with two pairs of support columns fixedly connected to its bottom. A hopper is located at the top of the conveyor belt, and a pair of guide blocks are fixedly connected to the inner wall of the hopper. A dispersing mechanism is located on the hopper. Support legs are fixedly connected to both ends of the hopper, with their bottoms fixedly connected to the horizontal conveyor belt. An adjustment mechanism is located on one side of the hopper. A pair of cleaning mechanisms, a transmission mechanism, a turning mechanism, and a pair of magnetic separation mechanisms are respectively located at the top of the horizontal conveyor belt. A pair of connecting plates are fixedly connected to one side of the horizontal conveyor belt, and a protective cover is fixedly connected to the top of each connecting plate. In the aforementioned application, the original equipment relies solely on the discharge port and a single crushing roller to break up the raw material during feeding, which easily leads to uneven feeding and jamming of the raw material on the conveyor belt, potentially preventing the magnetic roller from completely absorbing magnetic foreign matter in the negative electrode material. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a magnetic foreign matter removal device and method for automotive lithium battery negative electrode materials, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides a magnetic foreign matter removal device for automotive lithium battery negative electrode materials, comprising a base, a conveyor belt device fixedly connected to the top of the base, a feed inlet fixedly connected to the rear top of the conveyor belt device, a crushing roller movably connected inside the feed inlet, a primary magnetic suction roller and a secondary magnetic suction roller movably connected to the front and rear tops of the conveyor belt device respectively, a cleaning device movably connected to the outer sides of the primary and secondary magnetic suction rollers, and a guide slant fixedly connected inside the feed inlet; Two L-shaped support plates are fixedly connected to the left and right sides of the feed inlet. A rotating shaft is movably connected between the two L-shaped support plates. Torsion springs are movably connected inside the left and right ends of the rotating shaft. A material distribution trough is fixedly connected to the outside of the rotating shaft. A baffle plate is fixedly connected to the top of the material distribution trough. Multiple material distribution guide fins are fixedly connected to the bottom of the baffle plate. A movable plate is movably connected inside the material distribution trough. Multiple agglomerate blocks are fixedly connected to the front of the movable plate. Two sliding rods are fixedly connected to the rear of the left and right ends of the movable plate. The outer side of each sliding rod is movably connected to the inside of the material distribution trough. A fixed column is fixedly connected to the rear of the two sliding rods. A spring is fixedly connected between the fixed column and the material distribution trough. Two trigger blocks are fixedly connected to the left and right sides of the fixed column. Cams are fixedly connected to the left and right ends of the crushing roller. Set up a material leveling trough and break up clumps. Start the motor. When the weight of the negative electrode material in the material leveling trough increases, it works in conjunction with a rotating shaft, a movable plate, a sliding rod, a fixed column, a spring, a trigger block, and a cam to make the material leveling trough rotate downwards. At the same time, it makes the break up clumps move back and forth, thereby making the negative electrode material in the material leveling trough finer and spreading the negative electrode material more evenly on the conveyor belt equipment, thus making the subsequent magnetic attraction process more efficient.

[0006] As a further description of the above technical solution: The cam is located on the outer side of the left and right ends of the feed inlet, and the outer side of the trigger block does not contact the outer movement trajectory of the cam in the initial state.

[0007] As a further description of the above technical solution: A motor is fixedly connected to the left side of the crushing roller, and the width of each crushed block is smaller than the spacing between adjacent uniform guide fins.

[0008] As a further description of the above technical solution: A material dispensing port is provided at the bottom of the feed inlet, and the material dispensing port is located directly above the rear side of the material leveling trough. The rotating shaft is located inside the rear side of the material leveling trough, and a material turning assembly is movably connected to the top of the conveyor belt device.

[0009] As a further description of the above technical solution: The material turning assembly includes a fixed rod, a second sliding rod, a first sliding groove, a first fixed plate, a connecting rod, a first slider, a second fixed plate, a second sliding groove, a turning strip, a turning slot, a guide plate, and a dustproof plate. Two fixed rods are fixedly connected to the left and right sides of the crushing roller. A second sliding rod is fixedly connected to the top of each fixed rod. Two second fixed plates are fixedly connected to the top of the left and right sides of the conveyor belt. A second sliding groove is formed inside each second fixed plate. A first slider is movably connected inside the second sliding groove. A connecting rod is fixedly connected to the side of each first slider away from the center of the conveyor belt. A first fixed plate is fixedly connected to the rear side of the connecting rod. A first sliding groove is fixedly connected to the side of each first fixed plate near the center of the conveyor belt. The interior of the first sliding groove is movably connected to the outer side of the second sliding rod. A dustproof plate is fixedly connected between two first sliders. A turning strip is fixedly connected to the bottom of the dustproof plate. Multiple turning slots are formed on the inner bottom side of the turning strip. A guide plate is fixedly connected inside each turning slot. The addition of a material-turning component addresses the issue of clogging and jamming that can easily occur with traditional equipment after prolonged use. When the cam rotates, it works in conjunction with a fixed rod, slide bar two, slide groove one, fixed plate one, connecting rod, slider one, fixed plate two, slide groove two, and dustproof plate to move the material-turning bar up and down. This allows the material-turning bar to perform a cleaning process when it is at its highest position, preventing internal clogging after prolonged use and improving the equipment's turning efficiency. The material-turning bar can be turned even when it is at its lowest position, eliminating the need for additional power and reducing maintenance costs.

[0010] As a further description of the above technical solution: The guide plate faces diagonally upward, and the turning bar does not contact the negative electrode material on the conveyor belt in its initial state.

[0011] As a further description of the above technical solution: The crushing roller is located at the lower center of the fixed rod, the slide bar is located at the upper center of the fixed rod, and a vertical preliminary magnetic separation assembly is movably connected to the top rear side of the conveyor belt device.

[0012] As a further description of the above technical solution: The vertical preliminary magnetic separation assembly includes a fixed trigger rod, a vertical magnetic roller, a triangular wedge block, a fixed plate three, a guide scraper, a collection trough, a slide rail, a fixed plate four, and a spring two. The fixed trigger rod is fixedly connected to the bottom of the fixed plate one. The vertical magnetic roller is movably connected to the top rear side of the conveyor belt. Two slide rails are fixedly connected to the top rear side of the left and right ends of the conveyor belt. Fixed plates three are movably connected to the outer sides of the two slide rails. A collection trough is fixedly connected between each fixed plate three. A guide scraper is fixedly connected to the top front side of the collection trough. A fixed plate four is fixedly connected to the rear side of the slide rail. A spring two is fixedly connected between fixed plates three and four. A triangular wedge block is fixedly connected to the top of the fixed plate three. A vertical preliminary magnetic separation component is set up. When the negative electrode material is evenly sprinkled from the equalization trough onto the conveyor belt equipment, the vertical magnetic suction roller is activated. In conjunction with the fixed trigger rod, triangular wedge block, fixed plate three, guide scraper, collection trough, slide rail, fixed plate four, and spring two, the guide scraper contacts the outer side of the vertical magnetic suction roller, so that the vertical magnetic suction roller attracts magnetic foreign objects and cleans them at the same time, thus making the separation process of the equipment more efficient.

[0013] As a further description of the above technical solution: The triangular inclined block is initially located directly below the fixed trigger rod, and the length of the moving trajectory of the fixed plate three is consistent with the distance between the outer sides of the guide scraper and the vertical magnetic suction roller.

[0014] A method for removing magnetic foreign objects from the negative electrode material of an automotive lithium battery includes the following steps: S1. Pour the negative electrode material into the feed inlet, start the motor, and then start the conveyor belt equipment; S2. When the negative electrode material enters the uniform material tank, the uniform material tank rotates downward under the action of gravity. At the same time, the motor drives the cam to rotate. When the cam rotates to contact the trigger block, the trigger block moves inward along the direction of the uniform material tank. The trigger block continuously inserts between the uniform material guide fins, so that the agglomerated material that has not been completely ground is broken up a second time, and then the negative electrode material is evenly sprinkled from the uniform material tank onto the surface of the conveyor belt equipment. S3. After the negative electrode material is initially processed by the magnetic suction roller, the cam rotates and drives the fixed rod to rotate, so that the slide rod two drives the connecting rod to move up and down along the slide groove two. When the slide rod one is at the highest position, the machine can be paused briefly to clean the turning strip. When the material needs to be turned, the cam continues to rotate, so that the turning strip is lowered and inserted into the bottom layer of the negative electrode material, so that the negative electrode material is turned under the drive of the guide plate, and then the negative electrode material is processed by the second magnetic suction roller. S4. When the negative electrode material falls from the uniform feed trough, the vertical magnetic suction roller is activated to perform preliminary magnetic separation of the negative electrode material. At the same time, the guide scraper intermittently collects magnetic impurities on the vertical magnetic suction roller.

[0015] The advantages of this application are: (1) When the weight of the negative electrode material on the uniform material tank increases, the motor is started, and the rotating shaft, movable plate, sliding rod, fixed column, spring, trigger block and cam are used to make the uniform material tank rotate downward and the broken block move back and forth, so that the negative electrode material in the uniform material tank is more finely broken and the negative electrode material is spread more evenly on the conveyor belt equipment, so that the subsequent magnetic attraction process is more efficient.

[0016] (2) After long-term use, the material turning device of the original equipment of this application is prone to blockage and jamming. When the cam rotates, it works with the fixed rod, slide rod 2, slide groove 1, fixed plate 1, connecting rod, slider 1, fixed plate 2, slide groove 2, and dustproof plate to make the material turning bar move up and down repeatedly. When the material turning bar is at the highest position, the cleaning process can be carried out, thereby avoiding blockage inside the material turning device after long-term use. At the same time, the material turning efficiency of the equipment is improved, and the material turning can be carried out when the material turning bar is at the lowest position without the need for additional power drive, thereby reducing the equipment operation and maintenance costs.

[0017] (3) When the negative electrode material is evenly sprinkled from the equalization trough onto the conveyor belt equipment, the vertical magnetic suction roller is activated. In conjunction with the fixed trigger rod, triangular inclined block, fixed plate three, guide scraper, collection trough, slide rail, fixed plate four, and spring two, the guide scraper contacts the outer side of the vertical magnetic suction roller, so that the vertical magnetic suction roller attracts magnetic foreign objects and cleans them at the same time, thereby making the separation process of the equipment more efficient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall rear structure of the present invention; Figure 2 This is a schematic diagram of the overall front structure of the present invention; Figure 3 This is a schematic diagram of some components of the present invention; Figure 4 This is the invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the material turning component structure of the present invention; Figure 6 This is the present invention. Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the vertical preliminary magnetic separation component structure of the present invention; Figure 8 This is the invention Figure 7 Enlarged structural diagram at point C.

[0019] Explanation of key figure labels: 100. Base; 200. Conveyor belt equipment; 300. Feed inlet; 400. Crushing roller; 500. Primary magnetic roller; 600. Secondary magnetic roller; 700. Cleaning equipment; 800. Guide chock block; 901. L-shaped support plate; 902. Torsion spring; 903. Rotating shaft one; 904. Material leveling trough; 905. Baffle plate; 906. Broken clump; 907. Movable plate; 908. Slide rod one; 909. Fixed column; 910. Spring one; 911. Trigger block; 912. Cam; 1000. Flipping assembly; 1001. Fixing rod; 1002. Slide rod II; 1003. Slide groove I; 1004. Fixing plate I; 1005. Connecting rod; 1006. Slider I; 1007. Fixing plate II; 1008. Slide groove II; 1009. Flipping strip; 1010. Flipping groove opening; 1011. Guide plate; 1012. Dustproof plate; 1100. Vertical preliminary magnetic separation component; 1101. Fixed trigger rod; 1102. Vertical magnetic suction roller; 1103. Triangular inclined block; 1104. Fixed plate three; 1105. Guide scraper; 1106. Collection trough; 1107. Slide rail; 1108. Fixed plate four; 1109. Spring two. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0021] Example 1, as Figures 1-4 As shown, a magnetic foreign matter removal device for automotive lithium battery negative electrode material includes a base 100. A conveyor belt device 200 is fixedly connected to the top of the base 100. A feed inlet 300 is fixedly connected to the top of the rear side of the conveyor belt device 200. A crushing roller 400 is movably connected inside the feed inlet 300. The crushing roller 400 initially crushes the raw material clumps inside the feed inlet 300. A primary magnetic suction roller 500 and a secondary magnetic suction roller 600 are movably connected to the top of the front and rear sides of the conveyor belt device 200, respectively. A cleaning device 700 is movably connected to the outer side of the primary magnetic suction roller 500 and the secondary magnetic suction roller 600. The cleaning device 700 cleans and collects the magnetic foreign matter attracted to the surface of the primary magnetic suction roller 500 and the secondary magnetic suction roller 600. A guide slant block 800 is fixedly connected inside the feed inlet 300. Two L-shaped support plates 901 are fixedly connected to the left and right sides of the feed inlet 300. A rotating shaft 903 is movably connected between the two L-shaped support plates 901. Torsion springs 902 are movably connected inside the left and right ends of the rotating shaft 903. A material distribution trough 904 is fixedly connected to the outside of the rotating shaft 903. The material distribution trough 904 is designed so that when the weight of the negative electrode material on the material distribution trough 904 increases, the material distribution trough 904 rotates downward, making the negative electrode material spread more evenly. When the amount of negative electrode material is small, the negative electrode material on the material distribution trough 904 will continue to accumulate until the gravity is sufficient to press the material distribution trough 904 to rotate, thereby avoiding the phenomenon of failure to perform secondary crushing. A baffle plate 905 is fixedly connected to the top of the material distribution trough 904. Multiple material distribution guide fins are fixedly connected to the bottom of the baffle plate 905. The material distribution guide fins make the negative electrode material flow more evenly. The material flows evenly and leveled. A movable plate 907 is movably connected inside the material leveling trough 904. Multiple agglomeration blocks 906 are fixedly connected to the front side of the movable plate 907. The agglomeration blocks 906 are set to move back and forth, thereby making the negative electrode material in the material leveling trough 904 more finely broken. Two slide rods 908 are fixedly connected to the rear side of the left and right ends of the movable plate 907. The outer side of each slide rod 908 is movably connected to the inside of the material leveling trough 904. A fixed column 909 is fixedly connected to the rear side of the two slide rods 908. A spring 910 is fixedly connected between the fixed column 909 and the material leveling trough 904. The spring 910 allows the fixed column 909 to automatically reset. Two trigger blocks 911 are fixedly connected to the left and right sides of the fixed column 909. Cams 912 are fixedly connected to the left and right ends of the crushing roller 400.

[0022] Cam 912 is located on the outer side of the left and right ends of feed inlet 300. Initially, the outer side of trigger block 911 does not contact the outer movement trajectory of cam 912. A motor is fixedly connected to the left side of crushing roller 400; the motor is a variable frequency speed-adjustable motor, and the width of each crushed block 906 is smaller than the spacing between adjacent uniform material guide fins. A feeding port is provided at the bottom of feed inlet 300, located directly above the rear side of uniform material trough 904. Rotary shaft 903 is located inside the rear side of uniform material trough 904. A turning assembly 1000 is movably connected to the top of conveyor belt device 200.

[0023] In practical use, when the above-mentioned equipment is started, the negative electrode material is poured into the feed inlet 300, the motor is started, and the crushing roller 400 is rotated. This causes some of the large, agglomerated particles in the negative electrode material to be initially crushed by the crushing roller 400, allowing the negative electrode material to fall from the feeding port into the equalization trough 904. The gravity of the negative electrode material causes the equalization trough 904 to rotate clockwise downwards along the axis 903. This allows the negative electrode material accumulated on the equalization trough 904 to be evenly spread onto the conveyor belt 200 after passing through the equalization guide fins. Simultaneously, the trigger block 911 rotates with the equalization trough 904 to an upward angle, and the crushing roller 400 continues to rotate, causing the cam 912 to rotate with the crushing roller 400. When the cam 912... After the side contacts the trigger block 911, the trigger block 911 causes the fixed column 909 to move forward along the material equalization groove 904, causing the fixed column 909 to move the slide rod 908, compressing the spring 910, causing the slide rod 908 to move the movable plate 907, and causing the movable plate 907 to move the agglomeration block 906 forward along the material equalization groove 904. This allows the agglomeration block 906 to further crush the uncrushed agglomerates stuck in the gaps between the material equalization guide fins, thus facilitating the uniform spreading of the negative electrode material. At the same time, when the cam 912 releases contact with the trigger block 911, the spring 910 releases its elastic potential energy, causing the agglomeration block 906 to automatically reset, thus allowing the agglomeration block 906 to move back and forth.

[0024] Example 2, as Figures 1-7As shown, based on Embodiment 1, the material turning assembly 1000 includes a fixed rod 1001, a second sliding rod 1002, a first sliding groove 1003, a first fixed plate 1004, a connecting rod 1005, a first slider 1006, a second fixed plate 1007, a second sliding groove 1008, a turning strip 1009, a turning slot 1010, a guide plate 1011, and a dustproof plate 1012. The entire material turning assembly 1000 is located between the primary magnetic suction roller 500 and the secondary magnetic suction roller 600. Two fixed rods 1001 are fixedly connected to the left and right sides of the crushing roller 400. Each fixed rod 1001... A slide rod 1002 is fixedly connected to the top of the conveyor belt device 200. The slide rod 1002 is cylindrical, and the left and right ends of the slide groove 1003 are arc-shaped to prevent the slide rod 1002 from getting stuck when sliding in the slide groove 1003. Two fixing plates 1007 are fixedly connected to the top of the left and right sides of the conveyor belt device 200. Each fixing plate 1007 has a slide groove 1008 inside. A slider 1006 is movably connected inside the slide groove 1008. A connecting rod 1005 is fixedly connected to the side of each slider 1006 away from the center of the conveyor belt device 200. A fixing plate 1004 is fixedly connected to the rear side of the connecting rod 1005. A slide groove 1003 is fixedly connected to the side of each fixing plate 1004 closest to the center of the conveyor belt device 200. The interior of the slide groove 1003 is movably connected to the outside of the slide rod 1002. A dustproof plate 1012 is fixedly connected between the two slide blocks 1006. Dustproof side baffles are fixedly connected to both sides of the fixing plate 1007. A turning bar 1009 is fixedly connected to the bottom of the dustproof plate 1012. The turning bar 1009 is designed to move up and down reciprocally, allowing the turning bar 1009 to... When the 09 is at its highest position, a cleaning process can be performed, thus avoiding internal blockage of the turning equipment after prolonged use and improving the turning efficiency. The turning bar 1009 can turn materials when it is at its lowest position without the need for additional power, thereby reducing equipment operation and maintenance costs. Multiple turning slots 1010 are opened on the inner side of the bottom of the turning bar 1009. Each turning slot 1010 is fixedly connected to a guide plate 1011. The guide plate 1011 is set so that the negative electrode material is lifted and falls after passing through the guide plate 1011, forming a secondary mixture, thereby improving the turning effect.

[0025] The guide plate 1011 faces diagonally upward, and the turning bar 1009 does not contact the negative electrode material on the conveyor belt device 200 in the initial state. The crushing roller 400 is located at the lower center of the fixed rod 1001, and the slide bar 1002 is located at the upper center of the fixed rod 1001. A vertical preliminary magnetic separation assembly 1100 is movably connected to the rear top of the conveyor belt device 200.

[0026] In practical use, after the negative electrode material is laid flat on the conveyor belt 200, the magnetic suction roller 500 performs a screening of the negative electrode material. At this time, the crushing roller 400 drives the fixed rod 1001 to rotate, causing the fixed rod 1001 to drive the slide bar 1002 to move around the center of the crushing roller 400. The slide bar 1002 drives the slide groove 1003 and the fixed plate 1004 to move up and down reciprocally. The connecting rod 1005 follows the fixed plate 1004 to move up and down reciprocally, causing the slider 1006 to move up and down along the slide groove 1008. The slider 1006 drives the fixed dustproof plate 1012 and the turning bar 1009 to move up and down reciprocally. When the turning bar 1009 moves to its highest point, the motor briefly shuts off to clean it, preventing internal blockage after prolonged use. When the turning bar 1009 moves to its lowest point, the negative electrode material comes into contact with it, entering the turning slot 1010. The material is then lifted upwards along the guide plate 1011 and falls back down, completing the turning process. Simultaneously, since a large amount of dust is generated during turning, the dustproof plate 1012 moves downwards with the turning bar 1009 to limit dust emission, making equipment maintenance more convenient and protecting the environment.

[0027] Example 3, as Figures 2-8 As shown, based on Embodiment 2, the vertical preliminary magnetic separation assembly 1100 includes a fixed trigger rod 1101, a vertical magnetic roller 1102, a triangular inclined block 1103, a fixed plate three 1104, a guide scraper 1105, a collection trough 1106, a slide rail 1107, a fixed plate four 1108, and a spring two 1109. The fixed trigger rod 1101 is fixedly connected to the bottom of the fixed plate one 1004. The vertical magnetic roller 1102 is movably connected to the top rear side of the conveyor belt device 200. The vertical magnetic roller 1102 is configured to initially separate larger magnetic foreign objects in the falling negative electrode material. Two slide rails 1107 are fixedly connected to the top rear side of the left and right ends of the conveyor belt device 200. The outer sides of the two slide rails 1107 are movably connected to… Fixed plate three 1104, each fixed plate three 1104 is fixedly connected to a material collection trough 1106, the top front side of the material collection trough 1106 is fixedly connected to a guide scraper 1105, the guide scraper 1105 is made of wear-resistant soft material, so that the contact is buffered. The guide scraper 1105 is set so that the guide scraper 1105 contacts the outer side of the vertical magnetic suction roller 1102, so that the vertical magnetic suction roller 1102 attracts magnetic foreign objects and cleans them at the same time, so that the separation process of the equipment is more efficient. Fixed plate four 1108 is fixedly connected to the rear side of the slide rail 1107, and spring two 1109 is fixedly connected between fixed plate three 1104 and fixed plate four 1108. Triangular wedge block 1103 is fixedly connected to the top of fixed plate three 1104.

[0028] In its initial state, the triangular inclined block 1103 is located directly below the fixed trigger rod 1101, and the length of the moving trajectory of the fixed plate 1104 is consistent with the distance between the outer sides of the guide scraper 1105 and the vertical magnetic suction roller 1102.

[0029] In practical use, when the negative electrode material is evenly sprinkled from the equalization trough 904 onto the conveyor belt 200, the vertical magnetic suction roller 1102 is activated. This allows the vertical magnetic suction roller 1102 to absorb larger magnetic foreign objects in the falling negative electrode material, thus enabling preliminary magnetic sieving of the negative electrode material in the vertical direction. Simultaneously, the fixed plate 1004 moves up and down, causing the fixed trigger rod 1101 to follow suit. When the fixed trigger rod 1101 contacts the triangular inclined block 1103, the triangular inclined block 1103 slides forward along the slide rail 1107, causing the triangular inclined block 1103 to drive the fixed plate 1104... 104 moves forward, stretching spring 1109, causing fixed plate 1104 to move guide scraper 1105 and collection trough 1106 forward, so that the front side of guide scraper 1105 contacts the outer surface of vertical magnetic roller 1102, thereby allowing vertical magnetic roller 1102 to attract and clean magnetic foreign objects at the same time, making the separation process of the equipment more efficient. When fixed trigger rod 1101 separates from triangular wedge 1103, guide scraper 1105 moves backward to reset, thereby reducing the continuous contact between guide scraper 1105 and vertical magnetic roller 1102, thus reducing the wear of vertical magnetic roller 1102 and extending the service life of the equipment.

[0030] A method for removing magnetic foreign objects from the negative electrode material of an automotive lithium battery includes the following steps: S1. Pour the negative electrode material into the feed inlet 300, start the motor, and then start the conveyor belt device 200. S2. When the negative electrode material enters the uniform material tank 904, the uniform material tank 904 rotates downward under the action of gravity. At the same time, the motor drives the cam 912 to rotate. When the cam 912 rotates to contact the trigger block 911, the trigger block 911 moves inward along the direction of the uniform material tank 904. The trigger block 911 continuously inserts between the uniform material guide fins, so that the agglomerated material that has not been completely ground is broken up a second time, and then the negative electrode material is evenly sprinkled from the uniform material tank 904 onto the surface of the conveyor belt equipment 200. S3. After the negative electrode material is initially processed by the magnetic roller 500, the cam 912 continues to rotate, driving the fixed rod 1001 to rotate, causing the slide bar 1002 to drive the connecting rod 1005 to move up and down along the slide groove 1008. When the slider 1006 is at the highest position, the machine can be paused briefly to clean the turning bar 1009. When turning is required, the cam 912 continues to rotate, causing the turning bar 1009 to lower and insert into the bottom layer of the negative electrode material, so that the negative electrode material is turned over under the drive of the guide plate 1011, and then the negative electrode material is processed a second time by the secondary magnetic roller 600. S4. When the negative electrode material falls from the uniform feed trough 904, the vertical magnetic suction roller 1102 is activated to perform preliminary magnetic separation of the negative electrode material. At the same time, the guide scraper 1105 intermittently collects magnetic impurities on the vertical magnetic suction roller 1102.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic foreign matter removing device for a negative electrode material of an automotive lithium battery, comprising a base, characterized by, A conveyor belt is fixedly connected to the top of the base. A feed inlet is fixedly connected to the top rear side of the conveyor belt. A crushing roller is movably connected inside the feed inlet. A primary magnetic roller and a secondary magnetic roller are movably connected to the top front and rear sides of the conveyor belt, respectively. A cleaning device is movably connected to the outer sides of the primary and secondary magnetic rollers. A guide block is fixedly connected inside the feed inlet. Two L-shaped support plates are fixedly connected to the left and right sides of the feed inlet. A rotating shaft is movably connected between the two L-shaped support plates. Torsion springs are movably connected inside the left and right ends of the rotating shaft. A material distribution trough is fixedly connected to the outside of the rotating shaft. A baffle plate is fixedly connected to the top of the material distribution trough. Multiple material distribution guide fins are fixedly connected to the bottom of the baffle plate. A movable plate is movably connected inside the material distribution trough. Multiple agglomerate blocks are fixedly connected to the front of the movable plate. Two sliding rods are fixedly connected to the rear of the left and right ends of the movable plate. The outer side of each sliding rod is movably connected to the inside of the material distribution trough. A fixed column is fixedly connected to the rear of the two sliding rods. A spring is fixedly connected between the fixed column and the material distribution trough. Two trigger blocks are fixedly connected to the left and right sides of the fixed column. Cams are fixedly connected to the left and right ends of the crushing roller.

2. The magnetic foreign matter removing device for a negative material of a lithium battery for an automobile according to claim 1, characterized by The cam is located on the outer side of the left and right ends of the feed inlet, and the outer side of the trigger block does not contact the outer movement trajectory of the cam in the initial state.

3. The magnetic foreign matter removing device for a negative material of a lithium battery for an automobile according to claim 2, characterized by A motor is fixedly connected to the left side of the crushing roller, and the width of each crushed block is smaller than the spacing between adjacent uniform guide fins.

4. The magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 3, characterized in that, A material dispensing port is provided at the bottom of the feed inlet, and the material dispensing port is located directly above the rear side of the material leveling trough. The rotating shaft is located inside the rear side of the material leveling trough, and a material turning assembly is movably connected to the top of the conveyor belt device.

5. The magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 4, characterized in that, The material turning assembly includes a fixed rod, a second sliding rod, a first sliding groove, a first fixed plate, a connecting rod, a first slider, a second fixed plate, a second sliding groove, a turning strip, a turning slot, a guide plate, and a dustproof plate. Two fixed rods are fixedly connected to the left and right sides of the crushing roller. A second sliding rod is fixedly connected to the top of each fixed rod. Two second fixed plates are fixedly connected to the top of the left and right sides of the conveyor belt. A second sliding groove is formed inside each second fixed plate. A first slider is movably connected inside the second sliding groove. A connecting rod is fixedly connected to the side of each first slider away from the center of the conveyor belt. A first fixed plate is fixedly connected to the rear side of the connecting rod. A first sliding groove is fixedly connected to the side of each first fixed plate near the center of the conveyor belt. The interior of the first sliding groove is movably connected to the outer side of the second sliding rod. A dustproof plate is fixedly connected between two first sliders. A turning strip is fixedly connected to the bottom of the dustproof plate. Multiple turning slots are formed on the inner bottom side of the turning strip. A guide plate is fixedly connected inside each turning slot.

6. The magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 5, characterized in that, The guide plate faces diagonally upward, and the turning bar does not contact the negative electrode material on the conveyor belt in its initial state.

7. The magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 6, characterized in that, The crushing roller is located at the lower center of the fixed rod, the slide bar is located at the upper center of the fixed rod, and a vertical preliminary magnetic separation assembly is movably connected to the rear top of the conveyor belt device.

8. The magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 7, characterized in that, The vertical preliminary magnetic separation assembly includes a fixed trigger rod, a vertical magnetic roller, a triangular wedge block, a fixed plate three, a guide scraper, a collection trough, a slide rail, a fixed plate four, and a spring two. The fixed trigger rod is fixedly connected to the bottom of the fixed plate one. The vertical magnetic roller is movably connected to the top rear side of the conveyor belt. Two slide rails are fixedly connected to the top rear side of the left and right ends of the conveyor belt. Fixed plates three are movably connected to the outer sides of the two slide rails. A collection trough is fixedly connected between each fixed plate three. A guide scraper is fixedly connected to the top front side of the collection trough. A fixed plate four is fixedly connected to the rear side of the slide rail. A spring two is fixedly connected between fixed plates three and four. A triangular wedge block is fixedly connected to the top of the fixed plate three.

9. A magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 8, characterized in that, The triangular inclined block is initially located directly below the fixed trigger rod, and the length of the moving trajectory of the fixed plate three is consistent with the distance between the outer sides of the guide scraper and the vertical magnetic suction roller.

10. A method for removing magnetic foreign objects from the negative electrode material of an automotive lithium battery. A magnetic foreign matter removal device for automotive lithium battery negative electrode material according to claim 9, characterized in that, Includes the following steps: S1. Pour the negative electrode material into the feed inlet, start the motor, and then start the conveyor belt equipment; S2. When the negative electrode material enters the uniform material tank, the uniform material tank rotates downward under the action of gravity. At the same time, the motor drives the cam to rotate. When the cam rotates to contact the trigger block, the trigger block moves inward along the direction of the uniform material tank. The trigger block continuously inserts between the uniform material guide fins, so that the agglomerated material that has not been completely ground is broken up a second time, and then the negative electrode material is evenly sprinkled from the uniform material tank onto the surface of the conveyor belt equipment. S3. After the negative electrode material is initially processed by the magnetic suction roller, the cam rotates and drives the fixed rod to rotate, so that the slide rod two drives the connecting rod to move up and down along the slide groove two. When the slide rod one is at the highest position, the machine can be paused briefly to clean the turning strip. When the material needs to be turned, the cam continues to rotate, so that the turning strip is lowered and inserted into the bottom layer of the negative electrode material, so that the negative electrode material is turned under the drive of the guide plate, and then the negative electrode material is processed by the second magnetic suction roller. S4. When the negative electrode material falls from the uniform feed trough, the vertical magnetic suction roller is activated to perform preliminary magnetic separation of the negative electrode material. At the same time, the guide scraper intermittently collects magnetic impurities on the vertical magnetic suction roller.

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