Lithium battery material pressure sintering furnace and matched automatic feeding equipment and method

Abstract

The invention discloses a lithium battery material pressure sintering furnace and matched automatic feeding equipment and method.The lithium battery material pressure sintering furnace comprises a rack, a protective gas input mechanism fixedly installed on the rack, a vacuumizing mechanism and an electric cabinet and further comprises a preheating furnace, the preheating furnace is fixedly installed on the upper section of the rack, and a sealed feeding hopper is arranged at a feeding port of the preheating furnace; the sintering furnace is fixedly installed on the middle section of the rack, and a first material conveying channel is connected between the preheating furnace and the sintering furnace; a cooling furnace; the dispersion degree of the lithium battery raw materials during sintering can be improved so as to improve the preparation efficiency of the lithium battery raw materials, meanwhile, the sealed feeding hopper, the preheating furnace, the sintering furnace and the cooling furnace are in a separated state, continuous feeding, preheating, sintering and cooling of the lithium battery raw materials are achieved, shutdown is not needed, and the treatment efficiency of the lithium battery raw materials is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery material preparation, and in particular to a lithium battery material pressure sintering furnace and matched automatic feeding equipment and method. Background Art

[0002] With the continuous reduction of traditional energy (oil, natural gas, coal) reserves and the increasingly prominent environmental degradation caused by them, high energy density, lightweight rechargeable lithium-ion batteries are increasingly widely used in electric vehicles, mobile phones, laptops, digital cameras, camcorders, etc., and the market for lithium-ion battery materials in the world is also growing. Lithium-ion battery materials mainly include lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, lithium iron phosphate, ternary materials, etc. Among them, ternary lithium battery materials have high energy density, good cycle performance, and are relatively balanced in capacity and safety. In recent years, they have been increasingly used in power vehicles, gradually surpassing lithium iron phosphate and becoming the main trend in the power battery market.

[0003] The structure and performance of lithium-ion battery materials are inseparable from the preparation process and equipment. There are great differences in the structure and performance of lithium-ion battery materials produced by different preparation processes and equipment. At present, the methods for preparing lithium-ion battery materials mainly include solid phase synthesis, chemical precipitation, sol-gel, hydrothermal synthesis and spray degradation. Among them, the solid phase synthesis method is the most widely used in the actual production of lithium-ion battery materials due to its simple process and convenience for industrial production. Since the solid phase synthesis method has to be carried out at a higher temperature, the material is easily oxidized. Therefore, domestic enterprises basically use intermittent heat treatment equipment, which has low production efficiency and is not conducive to industrial production. In recent years, some domestic equipment manufacturers have tried to develop push plate kilns, mesh belt furnaces, and rotary kilns that can be used for continuous production of lithium-ion battery materials, and have made some progress. However, there is still a large gap in material stability and consistency compared with intermittent heat treatment equipment. Moreover, most of these equipment are designed according to the production process of lithium iron phosphate materials.

[0004] After searching, in the prior art, the Chinese patent with patent application number CN201910053621.9 discloses "a spiral propulsion atmosphere sintering furnace for producing ternary lithium battery materials, including a furnace body, a power system and a supporting mechanism; also including a through-type furnace located in the furnace body, a furnace, a feed port located above the furnace body, a discharge port located below the furnace body, a spiral conveying rod passing through the through-type furnace, a protective gas input and a gas pressure control device and a temperature control device connected to the furnace; the furnace runs through the through-type furnace from front to back, and both ends of the furnace are sealed with a sealing mechanism; the feed port is connected to one end of the furnace, and the other end of the furnace is connected to the discharge port; wherein the front, middle and rear sections of the furnace are divided into three process zones according to different temperatures, namely the first process zone, the second process zone and the third process zone. The present invention can realize continuous production, while ensuring the reduction of oxygen content in the working zone, realizing the smooth flow of materials along the feed port-furnace-discharge port, taking into account the performance and production efficiency of the materials", but there are still the following defects: (1) Lithium battery materials accumulate in the sintering furnace, resulting in poor uniformity of heat treatment; (2) The through-type furnace is not conducive to the continuous progress of each process and is not conducive to ensuring the sintering efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art that lithium battery materials accumulate in the sintering furnace, resulting in poor uniformity of heat treatment; the through-type furnace is not conducive to the continuous progress of each process and is not conducive to ensuring the sintering efficiency, and a pressurized sintering furnace for lithium battery materials and a matching automatic feeding device are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A lithium battery material pressure sintering furnace comprises a frame, a protective gas input mechanism fixedly mounted on the frame, a vacuum pumping mechanism and an electric control box, and further comprises: A preheating furnace, wherein the preheating furnace is fixedly mounted on the upper section of the frame, and a sealed feed hopper is provided at the feed inlet of the preheating furnace; A sintering furnace, wherein the sintering furnace is fixedly mounted on the middle section of the frame, and a first material conveying channel is connected between the preheating furnace and the sintering furnace; A cooling furnace, wherein the cooling furnace is fixedly mounted on the lower section of the frame, and a second material delivery channel is connected between the discharge port of the sintering furnace and the feed port of the cooling furnace; in, The feed inlet and the discharge outlet of the preheating furnace, the sintering furnace and the cooling furnace are all provided with a first vacuum solenoid valve, the preheating furnace, the sintering furnace and the cooling furnace are all connected with a vacuum pumping mechanism and a protective gas input mechanism, and the preheating furnace, the sintering furnace and the cooling furnace are all provided with a heating mechanism, a temperature control mechanism and a pressure gauge; a first screw conveying mechanism, wherein the first screw conveying mechanism is installed in the preheating furnace; a second screw conveying mechanism, wherein the second screw conveying mechanism is installed in the cooling furnace; A dispersion mechanism, wherein the dispersion mechanism is installed in the sintering furnace; in, Sealing mechanisms are provided at the junction of the first screw conveying mechanism and the preheating furnace, at the junction of the second screw conveying mechanism and the cooling mechanism, and at the junction of the dispersing mechanism and the sintering furnace.

[0007] Preferably, the dispersion mechanism includes a driving shaft installed in the sintering furnace body, a limit block fixedly connected to the outer wall of the driving shaft, a mounting plate fixedly connected to the inner wall of the sintering furnace and gap-matched with the driving shaft, a reciprocating assembly installed between the outer wall of the driving shaft and the mounting plate, a sliding sleeve slidably connected to the driving shaft and the outer wall of the limit block, a connecting rod fixedly connected between adjacent sliding sleeves, an avoidance groove opened on the sliding sleeve, a mounting frame fixedly installed on the outer wall of the sliding sleeve, a limit rod fixedly installed on the mounting frame away from the end of the sliding sleeve, a swing rod rotatably connected to the outer wall of the driving shaft, a constraint groove opened in the middle section of the swing rod, and a hollow dispersion frame fixedly connected to the end of the swing rod away from the driving shaft, and the limit rod slidably matches with the constraint groove.

[0008] Preferably, it also includes a stirring rod fixedly connected to the outer wall of the driving shaft, a hollow dispersion cylinder rotatably connected to the end of the stirring rod away from the driving shaft, a reset member installed between the stirring rod and the hollow dispersion cylinder, a gear fixedly connected to the end of the hollow dispersion cylinder away from the stirring rod through a support rod, and a semi-toothed ring fixedly connected to the inner wall of the sintering furnace and meshing with the gear.

[0009] Preferably, a feed groove is provided on the hollow dispersion cylinder, and a second spiral sheet is provided on the outer side wall of the hollow dispersion cylinder.

[0010] Preferably, the reset member includes a protective shell fixedly mounted on the end of the stirring rod away from the driving shaft and a torsion spring fixedly mounted between the shell wall of the protective shell and the bottom of the hollow dispersion cylinder.

[0011] Preferably, the reciprocating assembly includes a first bevel gear fixedly mounted on the outer wall of the driving shaft, a mounting bracket fixedly mounted on the outer wall of the mounting plate, a second bevel gear rotatably connected to an end of the mounting bracket away from the mounting plate and meshing with the first bevel gear, a cam fixedly mounted on the outer wall of the second bevel gear, a telescopic rod fixedly mounted on a side of the mounting plate close to the second bevel gear, a driven wheel fixedly mounted on an end of the telescopic rod away from the mounting plate and abutting the cam, a universal ball fixedly mounted on a side of the driven wheel away from the cam, a positioning plate fixedly mounted on the outer wall of the driving shaft, a reciprocating plate slidably connected to the driving shaft and the outer wall of the limit block and fixedly connected to the sliding sleeve, and a tension spring fixedly connected between the reciprocating plate and the positioning plate.

[0012] Preferably, the sealed feed hopper is connected to a vacuum pumping mechanism and a protective gas input mechanism.

[0013] The automatic feeding device of the lithium battery material pressure sintering furnace includes a storage hopper fixedly installed on a frame, and also includes: The auger lifting mechanism is connected to the frame, and the feed end and the discharge end of the auger lifting mechanism are respectively connected to the storage hopper and the sealed feed hopper, and a second vacuum solenoid valve is provided at the junction of the discharge end of the auger lifting mechanism and the sealed feed hopper. The auger lifting mechanism includes a mounting shell vertically mounted on a frame, a driving spiral lifting plate mounted in the mounting shell, and a feed pipe mounted between an outer side wall of the mounting shell near the top and a sealed feed hopper, the bottom of the mounting shell is open, and the bottom of the mounting shell is placed in a storage hopper.

[0014] A method for using a lithium battery material pressure sintering furnace and a matching automatic feeding device, comprising the following steps: S1: First, the automatic feeding equipment is controlled by the electric control box to lift the lithium battery material in the storage hopper to the feed pipe through the driving spiral lifting piece on the auger lifting mechanism, and then the material is fed into the sealed feed hopper through the feed pipe. At this time, the first vacuum solenoid valve and the second vacuum solenoid valve are closed by the electric control box, and the vacuum pumping mechanism is turned on. The air in the sealed feed hopper, preheating furnace, sintering furnace and cooling furnace is discharged through the vacuum pump and diffusion pump therein, and then the protective gas input mechanism is turned on to introduce nitrogen, argon and other protective gases into the sealed feed hopper, preheating furnace, sintering furnace and cooling furnace, and the pressure in the sealed feed hopper, preheating furnace, sintering furnace and cooling furnace is monitored by the pressure gauge to make the air pressure in the sealed feed hopper, preheating furnace, sintering furnace and cooling furnace slightly higher than the atmospheric pressure of the outside air, so as to prevent the outside air from entering the sealed feed hopper, preheating furnace, sintering furnace and cooling furnace; S2: while introducing the protective gas, the heating mechanism is turned on through the electric control box, the preheating furnace is heated to 150-200° through the heating mechanism, the first vacuum solenoid valve between the sealed feed hopper and the preheating furnace is opened, the lithium battery raw materials enter the preheating furnace through the feed hopper of the preheating furnace by their own gravity, and then the first vacuum solenoid valve between the sealed feed hopper and the preheating furnace is closed, preheating for 1-2 hours, and then the sintering furnace is heated to 800-900°, the first vacuum solenoid valve between the sintering furnace and the preheating furnace is opened, the lithium battery raw materials enter the sintering furnace through the first feeding channel between the preheating furnace and the sintering furnace by their own gravity, heating for 10-12 hours, and then the cooling furnace is heated to 50-100°, the sintered lithium battery raw materials enter the cooling furnace through the second feeding channel between the cooling furnace and the sintering furnace by their own gravity, and after cooling for 3-5 hours, the output material is crushed, sieved, sampled, and tested through the discharge port of the cooling furnace; S3: When the lithium battery raw materials enter the preheating furnace, sintering furnace and cooling furnace in sequence, the second vacuum solenoid valve is opened and the auger lifting mechanism is opened to send the lithium battery raw materials into the sealed feed hopper, and then the second vacuum solenoid valve is closed, and the vacuum pumping mechanism is opened to discharge the air in the sealed feed hopper through the vacuum pump and diffusion pump therein, and then the protective gas input mechanism is opened to introduce nitrogen, argon and other protective gases into the sealed feed hopper, and the pressure in the sealed feed hopper is monitored by the pressure gauge to make the air pressure slightly higher than the atmospheric pressure of the outside air to prevent the outside air from entering the sealed feed hopper. After the lithium battery raw materials in the preheating furnace are preheated and enter the sintering furnace, the lithium battery raw materials in the sealed feed hopper after treatment enter the preheating furnace again, and so on, the lithium battery raw materials can be continuously fed, preheated, sintered and cooled, which greatly improves the processing efficiency of the lithium battery raw materials; S4: When the lithium battery raw material enters the sintering furnace through the first spiral conveying mechanism, the driving shaft is turned on, and the driving shaft rotates to drive the stirring rod connected to its outer wall to rotate. As the stirring rod rotates, the lithium battery raw material accumulated at the bottom of the sintering furnace is broken up, thereby driving the hollow dispersion cylinder to rotate. When the hollow dispersion cylinder rotates to the lithium battery raw material accumulation point, the accumulated lithium battery raw material enters the hollow dispersion cylinder through the feeding trough. When the hollow dispersion cylinder rotates to leave the lithium battery raw material accumulation point and the gear at the end meshes with the half gear ring, the gear rotates with the half gear. At this time, the lithium battery raw material in the hollow dispersion cylinder is dispersed into the cavity in the sintering furnace under the action of the centrifugal force of the hollow dispersion cylinder and the gravity of the lithium battery raw material itself. The torsion spring is tightened while the hollow dispersion cylinder rotates. When the hollow dispersion cylinder rotates to separate from the half gear ring, the torsion spring rebounds, and the centrifugal force of the hollow dispersion cylinder further disperses the lithium battery raw material therein, which can effectively improve the sintering efficiency of the lithium battery raw material in the sintering furnace; S5: When the driving shaft rotates, it drives the first bevel gear to rotate. When the first bevel gear rotates, it drives the second bevel gear to rotate, and then drives the cam to rotate. When the convex point of the cam rotates to abut against the driven wheel, the telescopic rod extends to its longest length and pushes the reciprocating plate to the side away from the positioning plate through the universal ball. At this time, the tension spring is further stretched. As the cam rotates, its concave point abuts against the driven wheel. In this process, the rebound force of the tension spring pulls the reciprocating plate toward the direction close to the positioning plate. As the cam continues to rotate, the reciprocating plate is reciprocated along the driving shaft. During the movement, the sliding sleeve and the connecting rod are driven to reciprocate along the driving shaft. During the reciprocating movement of the sliding sleeve along the driving shaft, the mounting frame follows the movement. During the reciprocating movement of the mounting frame, the limit rod slides back and forth in the constraint groove, thereby driving the swing rod to swing back and forth, thereby driving the hollow dispersion frame to swing back and forth. When the hollow dispersion frame rotates to the lithium battery raw material accumulation point, the lithium battery raw material enters the frame. As the hollow dispersion frame separates from the raw material accumulation point, the raw material inside the frame is dispersed into the inner cavity of the sintering furnace as the hollow dispersion frame swings, thereby further improving the sintering efficiency of the lithium battery raw material in the sintering furnace.

[0015] Compared with the prior art, the present invention provides a lithium battery material pressure sintering furnace and a matching automatic feeding device, which have the following beneficial effects: 1. The lithium battery material pressure sintering furnace and the matching automatic feeding equipment realize the continuous feeding, preheating, sintering and cooling of lithium battery raw materials through the sealed feeding hopper, preheating furnace, sintering furnace and cooling furnace in a partitioned state without stopping the machine, which greatly improves the processing efficiency of lithium battery raw materials and solves the problem in the prior art that the through-type furnace is not conducive to the continuous progress of each process and is not conducive to ensuring the sintering efficiency.

[0016] 2. The lithium battery material pressurized sintering furnace and the matching automatic feeding equipment improve the dispersion of lithium battery raw materials in the sintering furnace by setting up a reciprocating swinging hollow dispersion frame, effectively improve the sintering efficiency of lithium battery raw materials in the sintering furnace, and solve the problem of lithium battery material accumulation in the sintering furnace in the prior art, resulting in poor uniformity of heat treatment.

[0017] 3. The lithium battery material pressurized sintering furnace and the matching automatic feeding equipment further improve the dispersion of the lithium battery raw materials in the sintering furnace by setting a reciprocating hollow dispersion cylinder, effectively improve the sintering efficiency of the lithium battery raw materials in the sintering furnace, and solve the problem of poor uniformity of heat treatment caused by the accumulation of lithium battery materials in the sintering furnace in the prior art.

[0018] 4. The lithium battery material pressure sintering furnace and the matching automatic feeding equipment realize the continuous feeding function of lithium battery raw materials through the set auger lifting mechanism and the cooperation with the vacuum pumping mechanism and the protective gas input mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is one of the structural schematic diagrams of the present invention; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is the third structural schematic diagram of the present invention; Figure 4 It is a structural schematic diagram of the auger lifting mechanism of the present invention; Figure 5 It is a front view of the dispersion mechanism of the present invention; Figure 6 It is a structural schematic diagram of the dispersion mechanism of the present invention; Figure 7 It is one of the partial structural schematic diagrams of the dispersion mechanism of the present invention; Figure 8 This is the second schematic diagram of the partial structure of the present invention; Fig. 9 It is a schematic structural diagram of the reciprocating assembly of the present invention.

[0020] In the figure: 10, frame; 110, protective gas input mechanism; 120, vacuum mechanism; 130, electric control box; 140, first vacuum solenoid valve; 150, heating mechanism; 160, temperature control mechanism; 170, pressure gauge; 180, sealing mechanism; 20, preheating furnace; 210, sealed feed hopper; 220, first screw conveying mechanism; 30, sintering furnace; 310, first feeding channel; 40, cooling furnace; 410, second feeding channel; 420, second screw conveying mechanism; 50, dispersion mechanism; 510, driving shaft; 511, limit block; 512, stirring rod; 513, hollow dispersion cylinder; 514, reset member; 5141, protective shell; 5142 , torsion spring; 515, gear; 516, half gear ring; 517, spiral piece; 520, mounting plate; 530, mounting frame; 540, reciprocating assembly; 541, first bevel gear; 542, second bevel gear; 543, cam; 544, telescopic rod; 545, driven wheel; 546, universal ball; 547, positioning plate; 548, reciprocating plate; 549, tension spring; 550, sliding sleeve; 551, connecting rod; 560, limit rod; 570, swing rod; 571, constraint groove; 580, hollow dispersion frame; 60, storage hopper; 70, auger lifting mechanism; 710, mounting shell; 720, driving spiral lifting piece; 730, feeding pipe; 80, second vacuum solenoid valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0022] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein. Example 1

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the automatic feeding device of the lithium battery material pressure sintering furnace includes a storage hopper 60 fixedly mounted on the frame 10, and also includes: The auger lifting mechanism 70 is connected to the frame 10, and the feeding end and the discharging end of the auger lifting mechanism 70 are respectively connected to the storage hopper 60 and the sealed feeding hopper 210, and a second vacuum solenoid valve 80 is provided at the junction of the discharging end of the auger lifting mechanism 70 and the sealed feeding hopper 210. The auger lifting mechanism 70 includes a mounting shell 710 vertically mounted on the frame 10, a driving spiral lifting piece 720 mounted in the mounting shell 710, and a feeding pipe 730 mounted between the outer wall of the mounting shell 710 near the top and the sealed feeding hopper 210. The bottom of the mounting shell 710 is open, and the bottom of the mounting shell 710 is placed in the storage hopper 60. When the second vacuum solenoid valve 80 is opened, the auger lifting mechanism 70 is opened to feed the lithium battery raw material into the sealed feeding hopper 210, and then the second vacuum solenoid valve 80 is closed. The solenoid valve 80 opens the vacuum pumping mechanism 120 to exhaust the air in the sealed feed hopper 210 through the vacuum pump and diffusion pump therein, and then opens the protective gas input mechanism 110 to introduce protective gases such as nitrogen and argon into the sealed feed hopper 210. The pressure in the sealed feed hopper 210 is monitored by the pressure gauge 170 to be slightly higher than the atmospheric pressure of the outside air to prevent outside air from entering the sealed feed hopper 210. The treated lithium battery raw materials in the sealed feed hopper 210 enter the preheating furnace 20 again. Example

[0024] Reference Figure 1-9 A lithium battery material pressure sintering furnace, including a lithium battery material pressure sintering furnace, including a frame 10, a protective gas input mechanism 110 fixedly mounted on the frame 10, a vacuum mechanism 120 and an electric control box 130, and also including, The preheating furnace 20 is fixedly mounted on the upper section of the frame 10, and a sealed feed hopper 210 is provided at the feed inlet of the preheating furnace 20; The sintering furnace 30 is fixedly mounted in the middle section of the frame 10, and a first material feeding channel 310 is connected between the preheating furnace 20 and the sintering furnace 30; The cooling furnace 40 is fixedly mounted on the lower section of the frame 10, and a second material delivery channel 410 is connected between the discharge port of the sintering furnace 30 and the feed port of the cooling furnace 40; While the protective gas is introduced, the heating mechanism 150 is turned on through the electric control box 130, and the preheating furnace 20 is heated to 150-200° by the heating mechanism 150, and the first vacuum solenoid valve 140 between the sealed feed hopper 210 and the preheating furnace 20 is opened, and the lithium battery raw materials enter the preheating furnace 20 through the feed hopper of the preheating furnace 20 by their own gravity, and then the first vacuum solenoid valve 140 between the sealed feed hopper 210 and the preheating furnace 20 is closed, and the preheating is performed for 1-2 hours, and then the sintering furnace 30 is heated to 800-900°, and the sintering furnace 3 is turned on. 0 and the first vacuum solenoid valve 140 between the preheating furnace 20 and the sintering furnace 30, the lithium battery raw material enters the sintering furnace 30 through the first feeding channel 310 between the preheating furnace 20 and the sintering furnace 30 by its own gravity, and is heated for 10-12 hours, and then the cooling furnace 40 is heated to 50-100°, and the sintered lithium battery raw material enters the cooling furnace 40 through the second feeding channel 410 between the cooling furnace 40 and the sintering furnace 30 by its own gravity, and after cooling for 3-5 hours, the output material is crushed, sieved, sampled, and tested through the discharge port of the cooling furnace 40. in, The first vacuum solenoid valve 140 is provided at the feed port and the discharge port of the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40. The preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 are all connected with the vacuum pumping mechanism 120 and the protective gas input mechanism 110, and the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 are all provided with a heating mechanism 150, a temperature control mechanism 160 and a pressure gauge 170. First, the automatic feeding device is controlled by the electric control box 130 to lift the lithium battery material in the storage hopper 60 to the feed pipe 730 through the driving spiral lifting piece 720 on the auger lifting mechanism 70, and then the lithium battery material is sent to the sealed feed hopper 210 through the feed pipe 730. At this time, the electric control box 130 is closed. Close the first vacuum solenoid valve 140 and the second vacuum solenoid valve 80, open the vacuum pumping mechanism 120, and exhaust the air in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 through the vacuum pump and the diffusion pump therein, then open the protective gas input mechanism 110, and introduce protective gases such as nitrogen and argon into the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40, and monitor through the pressure gauge 170 that the air pressure in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 is slightly higher than the atmospheric pressure of the outside air, so as to prevent the outside air from entering the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40; A first screw conveying mechanism 220, which is installed in the preheating furnace 20; A second screw conveying mechanism 420, which is installed in the cooling furnace 40; A dispersion mechanism 50, the dispersion mechanism 50 is installed in the sintering furnace 30; in, Sealing mechanisms 180 are provided at the intersection of the first screw conveying mechanism 220 and the preheating furnace 20 , at the intersection of the second screw conveying mechanism 420 and the cooling mechanism 40 , and at the intersection of the dispersion mechanism 50 and the sintering furnace 30 .

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The dispersion mechanism 50 includes a driving shaft 510 installed in the furnace body of the sintering furnace 30, a stopper 511 fixedly connected to the outer wall of the driving shaft 510, a mounting plate 520 fixedly connected to the inner wall of the sintering furnace 30 and having a clearance fit with the driving shaft 510, a reciprocating assembly 540 installed between the outer wall of the driving shaft 510 and the mounting plate 520, a sleeve 550 slidably connected to the driving shaft 510 and the outer wall of the stopper 511, and a connecting rod fixedly connected between adjacent sleeves 550. 551, an avoidance groove provided on the sliding sleeve 550, a mounting frame 530 fixedly installed on the outer wall of the sliding sleeve 550, a limiting rod 560 fixedly installed on the mounting frame 530 at one end away from the sliding sleeve 550, a swinging rod 570 rotatably connected to the outer wall of the driving shaft 510, a restraining groove 571 provided in the middle section of the swinging rod 570 and a hollow dispersion frame 580 fixedly connected to one end of the swinging rod 570 away from the driving shaft 510, the limiting rod 560 slidably cooperates with the restraining groove 571.

[0026] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 , further comprising a stirring rod 512 fixedly connected to the outer wall of the driving shaft 510, a hollow dispersion cylinder 513 rotatably connected to the end of the stirring rod 512 away from the driving shaft 510, a reset member 514 installed between the stirring rod 512 and the hollow dispersion cylinder 513, a gear 515 fixedly connected to the end of the hollow dispersion cylinder 513 away from the stirring rod 512 through a support rod, and a semi-toothed ring 516 fixedly connected to the inner wall of the sintering furnace 30 and meshing with the gear 515, a feeding groove is provided on the hollow dispersion cylinder 513, and the hollow dispersion cylinder The outer wall of 513 is provided with a second spiral sheet 517. When the lithium battery raw material enters the sintering furnace 30 through the first spiral conveying mechanism 220, the driving shaft 510 is turned on. The driving shaft 510 rotates to drive the stirring rod 512 connected to its outer wall to rotate. As the stirring rod 512 rotates, the lithium battery raw material accumulated at the bottom of the sintering furnace 30 is broken up, thereby driving the hollow dispersion cylinder 513 to rotate. When the hollow dispersion cylinder 513 rotates to the place where the lithium battery raw material is accumulated, the accumulated lithium battery raw material enters the hollow dispersion cylinder 513 through the feeding trough.

[0027] Reference Figure 1 , Figure 2, Figure 3 , Figure 5 , Figure 6 and Figure 8 The reset member 514 includes a protective shell 5141 fixedly installed at one end of the stirring rod 512 away from the driving shaft 510 and a torsion spring 5142 fixedly installed between the shell wall of the protective shell 5141 and the bottom of the hollow dispersion cylinder 513. When the hollow dispersion cylinder 513 rotates to leave the lithium battery raw material accumulation point and the gear 515 at the end engages with the semi-toothed ring 516, the gear 515 rotates following the semi-toothed ring 516. At this time, the lithium battery raw material in the hollow dispersion cylinder 513 is dispersed into the cavity in the sintering furnace 30 under the action of the centrifugal force of the hollow dispersion cylinder 513 and the gravity of the lithium battery raw material itself. The torsion spring 5142 is tightened while the hollow dispersion cylinder 513 rotates. When the hollow dispersion cylinder 513 rotates to separate from the semi-toothed ring 516, the torsion spring 5142 rebounds, and the centrifugal force of the hollow dispersion cylinder 513 further disperses the lithium battery raw material therein, which can effectively improve the sintering efficiency of the lithium battery raw material in the sintering furnace 30.

[0028] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Fig. 9The reciprocating assembly 540 includes a first bevel gear 541 fixedly mounted on the outer wall of the driving shaft 510, a mounting frame fixedly mounted on the outer wall of the mounting plate 520, a second bevel gear 542 rotatably connected to the end of the mounting frame away from the mounting plate 520 and meshing with the first bevel gear 541, a cam 543 fixedly mounted on the outer wall of the second bevel gear 542, a telescopic rod 544 fixedly mounted on the side of the mounting plate 520 close to the second bevel gear 542, a driven wheel 545 fixedly mounted on the end of the telescopic rod 544 away from the mounting plate 520 and abutting against the cam 543, and a driven wheel 545 fixedly mounted on the end of the driven wheel 545 away from the mounting plate 520. The universal ball 546 on the side away from the cam 543, the positioning plate 547 fixedly installed on the outer wall of the driving shaft 510, the reciprocating plate 548 slidably connected to the driving shaft 510 and the outer wall of the limit block 511 and fixedly connected to the sliding sleeve 550, and the tension spring 549 fixedly connected between the reciprocating plate 548 and the positioning plate 547, when the driving shaft 510 rotates, drives the first bevel gear 541 to rotate. When the first bevel gear 541 rotates, it drives the second bevel gear 542 to rotate, and then drives the cam 543 to rotate. When the convex point of the cam 543 rotates to abut against the driven wheel 545, the telescopic rod 540 is rotated. 44 is stretched to its longest length, and the reciprocating plate 548 is pushed to the side away from the positioning plate 547 through the universal ball 546. At this time, the tension spring 549 is further stretched. As the cam 543 rotates, its concave point abuts against the driven wheel 542. In this process, the resilience of the tension spring 549 pulls the reciprocating plate 548 toward the direction close to the positioning plate 547. As the cam 543 continues to rotate, the reciprocating plate 548 is reciprocated along the drive shaft. In the process of the reciprocating movement of the reciprocating plate 548, the sliding sleeve 550 and the connecting rod 551 are driven to reciprocate along the drive shaft 510. During the reciprocating movement of the driving shaft 510, the mounting frame 530 follows the movement. During the reciprocating movement of the mounting frame 530, the limiting rod 560 slides back and forth in the constraint groove 571, thereby driving the swing rod 570 to swing back and forth, thereby driving the hollow dispersion frame 580 to swing back and forth. When the hollow dispersion frame 580 rotates to the lithium battery raw material accumulation point, the lithium battery raw material enters the frame. As the hollow dispersion frame 580 separates from the raw material accumulation point, the raw material inside the frame is dispersed into the inner cavity of the sintering furnace 30 as the hollow dispersion frame 580 swings, thereby further improving the sintering efficiency of the lithium battery raw material in the sintering furnace 30.

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The sealed feed hopper 210 is connected to the vacuum pumping mechanism 120 and the protective gas input mechanism 110 .

[0030] First, the electric control box 130 controls the automatic feeding device to lift the lithium battery material in the storage hopper 60 to the feeding pipe 730 through the driving spiral lifting piece 720 on the auger lifting mechanism 70, and then feeds it into the sealed feeding hopper 210 through the feeding pipe 730. At this time, the first vacuum solenoid valve 140 and the second vacuum solenoid valve 80 are closed through the electric control box 130, and the vacuum pumping mechanism 120 is opened. The sealed feeding hopper 210, the preheating furnace 20, and the sintering furnace 3 are filled with the vacuum pump and the diffusion pump therein. 0 and the cooling furnace 40, and then the protective gas input mechanism 110 is opened to introduce protective gases such as nitrogen and argon into the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40, and the pressure in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 is monitored by the pressure gauge 170 to make the air pressure in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 slightly higher than the atmospheric pressure of the outside air, so as to prevent the outside air from entering the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40. The vacuum pumping mechanism 120 is turned on, and the air in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 is exhausted through the vacuum pump and the diffusion pump therein, and then the protective gas input mechanism 110 is turned on to introduce protective gases such as nitrogen and argon into the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40, and the pressure in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 is monitored by the pressure gauge 170 to make the air pressure in the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 slightly higher than the atmospheric pressure of the outside air, so as to prevent the outside air from entering the sealed feed hopper 210, the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40; While the protective gas is introduced, the heating mechanism 150 is turned on through the electric control box 130, and the preheating furnace 20 is heated to 150-200° by the heating mechanism 150, and the first vacuum solenoid valve 140 between the sealed feed hopper 210 and the preheating furnace 20 is opened, and the lithium battery raw materials enter the preheating furnace 20 through the feed hopper of the preheating furnace 20 by their own gravity, and then the first vacuum solenoid valve 140 between the sealed feed hopper 210 and the preheating furnace 20 is closed, and the preheating is performed for 1-2 hours, and then the sintering furnace 30 is heated to 800-900°, and the sintering furnace 3 is turned on. 0 and the first vacuum solenoid valve 140 between the preheating furnace 20 and the sintering furnace 30, the lithium battery raw material enters the sintering furnace 30 through the first feeding channel 310 between the preheating furnace 20 and the sintering furnace 30 by its own gravity, and is heated for 10-12 hours, and then the cooling furnace 40 is heated to 50-100°, and the sintered lithium battery raw material enters the cooling furnace 40 through the second feeding channel 410 between the cooling furnace 40 and the sintering furnace 30 by its own gravity, and after cooling for 3-5 hours, the output material is crushed, sieved, sampled, and tested through the discharge port of the cooling furnace 40; When the lithium battery raw materials enter the preheating furnace 20, the sintering furnace 30 and the cooling furnace 40 in sequence, the second vacuum solenoid valve 80 is opened and the auger lifting mechanism 70 is opened to feed the lithium battery raw materials into the sealed feed hopper 210, and then the second vacuum solenoid valve 80 is closed, and the vacuum pumping mechanism 120 is opened to discharge the air in the sealed feed hopper 210 through the vacuum pump and the diffusion pump therein, and then the protective gas input mechanism 110 is opened to introduce nitrogen, argon and other protective gases into the sealed feed hopper 210, and the pressure gauge 170 is used to monitor that the air pressure in the sealed feed hopper 210 is slightly higher than the atmospheric pressure of the outside air to prevent the outside air from entering the sealed feed hopper 210. After the lithium battery raw materials in the preheating furnace 20 are preheated and enter the sintering furnace 30, the lithium battery raw materials in the sealed feed hopper 210 after treatment enter the preheating furnace 20 again, and so on, the lithium battery raw materials can be continuously fed, preheated, sintered and cooled, and the processing efficiency of the lithium battery raw materials is greatly improved; When the lithium battery raw material enters the sintering furnace 30 through the first spiral conveying mechanism 220, the driving shaft 510 is turned on. The driving shaft 510 rotates to drive the stirring rod 512 connected to its outer wall to rotate. As the stirring rod 512 rotates, the lithium battery raw material accumulated at the bottom of the sintering furnace 30 is broken up, thereby driving the hollow dispersion cylinder 513 to rotate. When the hollow dispersion cylinder 513 rotates to the lithium battery raw material accumulation point, the accumulated lithium battery raw material enters the hollow dispersion cylinder 513 through the feeding trough. When the hollow dispersion cylinder 513 rotates to leave the lithium battery raw material accumulation point, and the gear 515 at the end is connected to the gear 515 at the end, the gear 515 at the end is connected to the gear 515 at the end. When the half gear ring 516 is meshed, the gear 515 rotates along with the half gear 516. At this time, the lithium battery raw material in the hollow dispersion cylinder 513 is dispersed into the cavity in the sintering furnace 30 under the action of the centrifugal force of the hollow dispersion cylinder 513 and the gravity of the lithium battery raw material itself. The hollow dispersion cylinder 513 rotates while tightening the torsion spring 5142. When the hollow dispersion cylinder 513 rotates to separate from the half gear ring 516, the torsion spring 5142 rebounds. The centrifugal force of the hollow dispersion cylinder 513 further disperses the lithium battery raw material therein, which can effectively improve the sintering efficiency of the lithium battery raw material in the sintering furnace 30. When the drive shaft 510 rotates, the first bevel gear 541 is driven to rotate. When the first bevel gear 541 rotates, the second bevel gear 542 is driven to rotate, and then the cam 543 is driven to rotate. When the convex point of the cam 543 rotates to abut against the driven wheel 545, the telescopic rod 544 is extended to its longest position and pushes the reciprocating plate 548 to the side away from the positioning plate 547 through the universal ball 546. At this time, the tension spring 549 is further stretched. As the cam 543 rotates, its concave point abuts against the driven wheel 542. During this process, the resilience of the tension spring 549 pulls the reciprocating plate 548 in the direction close to the positioning plate 547. As the cam 543 continues to rotate, the reciprocating plate 548 is reciprocated along the drive shaft. During the reciprocating movement of 48, the sliding sleeve 550 and the connecting rod 551 are driven to reciprocate along the driving shaft 510. During the reciprocating movement of the sliding sleeve 550 along the driving shaft 510, the mounting frame 530 follows the movement. During the reciprocating movement of the mounting frame 530, the limiting rod 560 slides back and forth in the constraint groove 571, thereby driving the swing rod 570 to swing back and forth, thereby driving the hollow dispersion frame 580 to swing back and forth. When the hollow dispersion frame 580 rotates to the lithium battery raw material accumulation point, the lithium battery raw material enters the frame. As the hollow dispersion frame 580 separates from the raw material accumulation point, the raw material inside the frame is dispersed into the inner cavity of the sintering furnace 30 as the hollow dispersion frame 580 swings, thereby further improving the sintering efficiency of the lithium battery raw material in the sintering furnace 30.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery material pressure sintering furnace, comprising a frame (10), a protective gas input mechanism (110) fixedly mounted on the frame (10), a vacuum pumping mechanism (120) and an electric control box (130), characterized in that: Also includes, A preheating furnace (20), the preheating furnace (20) being fixedly mounted on the upper section of the frame (10), and a sealed feed hopper (210) being provided at a feed inlet of the preheating furnace (20); a sintering furnace (30), the sintering furnace (30) being fixedly mounted on the middle section of the frame (10), and a first material conveying channel (310) being connected between the preheating furnace (20) and the sintering furnace (30); A cooling furnace (40), the cooling furnace (40) being fixedly mounted on the lower section of the frame (10), and a second material delivery channel (410) being connected between the material discharge port of the sintering furnace (30) and the material feed port of the cooling furnace (40); in, A first vacuum solenoid valve (140) is provided at the feed inlet and the discharge outlet of the preheating furnace (20), the sintering furnace (30) and the cooling furnace (40); the preheating furnace (20), the sintering furnace (30) and the cooling furnace (40) are all connected to a vacuum pumping mechanism (120) and a protective gas input mechanism (110); and the preheating furnace (20), the sintering furnace (30) and the cooling furnace (40) are all provided with a heating mechanism (150), a temperature control mechanism (160) and a pressure gauge (170); a first screw conveying mechanism (220), wherein the first screw conveying mechanism (220) is installed in the preheating furnace (20); a second screw conveying mechanism (420), wherein the second screw conveying mechanism (420) is installed in the cooling furnace (40); A dispersion mechanism (50), wherein the dispersion mechanism (50) is installed in the sintering furnace (30); in, Sealing mechanisms (180) are provided at the intersection of the first screw conveying mechanism (220) and the preheating furnace (20), the intersection of the second screw conveying mechanism (420) and the cooling mechanism (40), and the intersection of the dispersion mechanism (50) and the sintering furnace (30).

2. A lithium battery material pressure sintering furnace according to claim 1, characterized in that: The dispersion mechanism (50) comprises a driving shaft (510) installed in a furnace body of a sintering furnace (30), a stop block (511) fixedly connected to the outer wall of the driving shaft (510), a mounting plate (520) fixedly connected to the inner wall of the sintering furnace (30) and having a clearance fit with the driving shaft (510), a reciprocating assembly (540) installed between the outer wall of the driving shaft (510) and the mounting plate (520), a sliding sleeve (550) slidably connected to the driving shaft (510) and the outer wall of the stop block (511), and a connecting rod (540) fixedly connected between adjacent sliding sleeves (550). 551), an avoidance groove formed on the sliding sleeve (550), a mounting frame (530) fixedly mounted on the outer wall of the sliding sleeve (550), a limit rod (560) fixedly mounted on the end of the mounting frame (530) away from the sliding sleeve (550), a swing rod (570) rotatably connected to the outer wall of the driving shaft (510), a constraint groove (571) formed in the middle section of the swing rod (570), and a hollow dispersion frame (580) fixedly connected to the end of the swing rod (570) away from the driving shaft (510), wherein the limit rod (560) is slidably matched with the constraint groove (571).

3. A lithium battery material pressure sintering furnace according to claim 2, characterized in that: It also includes a stirring rod (512) fixedly connected to the outer wall of the driving shaft (510), a hollow dispersion cylinder (513) rotatably connected to the end of the stirring rod (512) away from the driving shaft (510), a reset member (514) installed between the stirring rod (512) and the hollow dispersion cylinder (513), a gear (515) fixedly connected to the end of the hollow dispersion cylinder (513) away from the stirring rod (512) via a support rod, and a semi-toothed ring (516) fixedly connected to the inner wall of the sintering furnace (30) and meshing with the gear (515).

4. A lithium battery material pressure sintering furnace according to claim 3, characterized in that: A feed groove is provided on the hollow dispersion cylinder (513), and a second spiral sheet (517) is provided on the outer side wall of the hollow dispersion cylinder (513).

5. A lithium battery material pressure sintering furnace according to claim 4, characterized in that: The reset member (514) comprises a protective shell (5141) fixedly mounted on an end of the stirring rod (512) away from the driving shaft (510), and a torsion spring (5142) fixedly mounted between the shell wall of the protective shell (5141) and the bottom of the hollow dispersion cylinder (513).

6. A lithium battery material pressure sintering furnace according to claim 2, characterized in that: The reciprocating assembly (540) comprises a first bevel gear (541) fixedly mounted on the outer wall of the driving shaft (510), a mounting frame fixedly mounted on the outer wall of the mounting plate (520), a second bevel gear (542) rotatably connected to an end of the mounting frame away from the mounting plate (520) and meshing with the first bevel gear (541), a cam (543) fixedly mounted on the outer wall of the second bevel gear (542), a telescopic rod (544) fixedly mounted on a side of the mounting plate (520) close to the second bevel gear (542), and a cam (543) fixedly mounted on the outer wall of the second bevel gear (542). A driven wheel (545) is disposed at one end of the driven wheel (545) away from the mounting plate (520) and in contact with the cam (543), a universal ball (546) is fixedly mounted on the side of the driven wheel (545) away from the cam (543), a positioning plate (547) is fixedly mounted on the outer wall of the driving shaft (510), a reciprocating plate (548) is slidably connected to the driving shaft (510) and the outer wall of the limit block (511) and is fixedly connected to the sliding sleeve (550), and a tension spring (549) is fixedly connected between the reciprocating plate (548) and the positioning plate (547).

7. A lithium battery material pressure sintering furnace according to claim 6, characterized in that: The sealed feed hopper (210) is in communication with the vacuum extraction mechanism (120) and the protective gas input mechanism (110).

8. An automatic feeding device for a lithium battery material pressure sintering furnace matched with the lithium battery material pressure sintering furnace according to any one of claims 1 to 7, comprising a storage hopper (60) fixedly mounted on a frame (10), characterized in that: Also includes, An auger lifting mechanism (70), the auger lifting mechanism (70) being connected to the frame (10), and the feed end and the discharge end of the auger lifting mechanism (70) being respectively connected to the storage hopper (60) and the sealed feed hopper (210), and a second vacuum solenoid valve (80) being provided at the junction of the discharge end of the auger lifting mechanism (70) and the sealed feed hopper (210).

9. A lithium battery material pressure sintering furnace and a matching automatic feeding device according to claim 8, characterized in that: The auger lifting mechanism (70) comprises a mounting shell (710) vertically mounted on a frame (10), a driving spiral lifting plate (720) mounted in the mounting shell (710), and a feed pipe (730) mounted between an outer wall of the mounting shell (710) near the top and a sealed feed hopper (210), wherein the bottom of the mounting shell (710) is open, and the bottom of the mounting shell (710) is placed in a storage hopper (60).

10. A method for using a lithium battery material pressure sintering furnace and a matching automatic feeding device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, the electric control box (130) controls the automatic feeding device to lift the lithium battery material in the storage hopper (60) to the feeding pipe (730) through the driving spiral lifting piece (720) on the auger lifting mechanism (70), and then feeds the lithium battery material into the sealed feeding hopper (210) through the feeding pipe (730). At this time, the first vacuum solenoid valve (140) and the second vacuum solenoid valve (80) are closed through the electric control box (130), and the vacuum pumping mechanism (120) is opened. The sealed feeding hopper (210), the preheating furnace (20), and the sintering furnace (30) are vacuumed by the vacuum pump and the diffusion pump therein. ) and the cooling furnace (40), and then opening the protective gas input mechanism (110) to introduce protective gas such as nitrogen and argon into the sealed feed hopper (210), the preheating furnace (20), the sintering furnace (30), and the cooling furnace (40), and monitoring by the pressure gauge (170) to ensure that the air pressure in the sealed feed hopper (210), the preheating furnace (20), the sintering furnace (30), and the cooling furnace (40) is slightly higher than the atmospheric pressure of the outside air, so as to prevent the outside air from entering the sealed feed hopper (210), the preheating furnace (20), the sintering furnace (30), and the cooling furnace (40); S2: while introducing the protective gas, the heating mechanism (150) is turned on through the electric control box (130), the preheating furnace (20) is heated to 150-200° by the heating mechanism (150), the first vacuum solenoid valve (140) between the sealed feed hopper (210) and the preheating furnace (20) is turned on, the lithium battery raw materials enter the preheating furnace (20) through the feed hopper of the preheating furnace (20) by their own gravity, then the first vacuum solenoid valve (140) between the sealed feed hopper (210) and the preheating furnace (20) is turned off, the preheating is performed for 1-2 hours, and then the sintering furnace (30) is heated to 800-900°, and the sintering is turned on. A first vacuum solenoid valve (140) is formed between the preheating furnace (20) and the sintering furnace (30); the lithium battery raw material enters the sintering furnace (30) through the first feeding channel (310) between the preheating furnace (20) and the sintering furnace (30) by its own gravity, and is heated for 10-12 hours. Then, the cooling furnace (40) is heated to 50-100°. The sintered lithium battery raw material enters the cooling furnace (40) through the second feeding channel (410) between the cooling furnace (40) and the sintering furnace (30) by its own gravity. After cooling for 3-5 hours, the output material is crushed, sieved, sampled, and tested through the discharge port of the cooling furnace (40); S3: When the lithium battery raw materials enter the preheating furnace (20), the sintering furnace (30) and the cooling furnace (40) in sequence, the second vacuum solenoid valve (80) is opened and the auger lifting mechanism (70) is opened to feed the lithium battery raw materials into the sealed feed hopper (210), then the second vacuum solenoid valve (80) is closed, the vacuum pumping mechanism (120) is opened, and the air in the sealed feed hopper (210) is exhausted through the vacuum pump and diffusion pump therein, then the protective gas input mechanism (110) is opened to pass the protective gas into the sealed feed hopper (210). A protective gas such as nitrogen or argon is introduced, and the pressure in the sealed feed hopper (210) is monitored by a pressure gauge (170) to make the pressure slightly higher than the atmospheric pressure of the outside air, thereby preventing the outside air from entering the sealed feed hopper (210). After the lithium battery raw materials in the preheating furnace (20) are preheated and enter the sintering furnace (30), the treated lithium battery raw materials in the sealed feed hopper (210) enter the preheating furnace (20) again, and so on. The continuous loading, preheating, sintering and cooling of the lithium battery raw materials can be realized, thereby greatly improving the processing efficiency of the lithium battery raw materials. S4: When the lithium battery raw material enters the sintering furnace (30) through the first screw conveying mechanism (220), the driving shaft (510) is turned on, and the driving shaft (510) rotates to drive the stirring rod (512) connected to its outer wall to rotate. As the stirring rod (512) rotates, the lithium battery raw material accumulated at the bottom of the sintering furnace (30) is dispersed, thereby driving the hollow dispersion cylinder (513) to rotate. When the hollow dispersion cylinder (513) rotates to the lithium battery raw material accumulation point, the accumulated lithium battery raw material enters the hollow dispersion cylinder (513) through the feeding trough. When the hollow dispersion cylinder (513) rotates to leave the lithium battery raw material accumulation point, and the gear (515) at the end thereof is turned on. When meshing with the half gear ring (516), the gear (515) rotates following the half gear (516), and the lithium battery raw material in the hollow dispersion cylinder (513) is dispersed into the cavity in the sintering furnace (30) under the action of the centrifugal force of the hollow dispersion cylinder (513) and the gravity of the lithium battery raw material itself. The torsion spring (5142) is tightened while the hollow dispersion cylinder (513) rotates. When the hollow dispersion cylinder (513) rotates to separate from the half gear ring (516), the torsion spring (5142) rebounds, and the centrifugal force of the hollow dispersion cylinder (513) further disperses the lithium battery raw material in it, thereby effectively improving the sintering efficiency of the lithium battery raw material in the sintering furnace (30); S5: When the driving shaft (510) rotates, the first bevel gear (541) is driven to rotate. When the first bevel gear (541) rotates, the second bevel gear (542) is driven to rotate, and then the cam (543) is driven to rotate. When the convex point of the cam (543) rotates to abut against the driven wheel (545), the telescopic rod (544) is extended to its longest length and pushes the reciprocating plate (548) to the side away from the positioning plate (547) through the universal ball (546). At this time, the tension spring (549) is further stretched. As the cam (543) rotates, its concave point abuts against the driven wheel (542). In this process, the rebound force of the tension spring (549) pulls the reciprocating plate (548) in the direction close to the positioning plate (547). As the cam (543) continues to rotate, the reciprocating plate (548) is reciprocated along the driving shaft. During the reciprocating movement of the reciprocating plate (548), the sliding sleeve (550) and the connecting rod (551) are driven to reciprocate along the driving shaft (510); during the reciprocating movement of the sliding sleeve (550) along the driving shaft (510), the mounting frame (530) moves accordingly; during the reciprocating movement of the mounting frame (530), the limiting rod (560) slides back and forth in the restraining groove (571), thereby driving the swing rod (570) to swing back and forth, thereby driving the hollow dispersion frame (580) to swing back and forth; when the hollow dispersion frame (580) rotates to the lithium battery raw material accumulation point, the lithium battery raw material enters the frame; as the hollow dispersion frame (580) leaves the raw material accumulation point, the raw material inside the frame is dispersed into the inner cavity of the sintering furnace (30) as the hollow dispersion frame (580) swings, thereby further improving the sintering efficiency of the lithium battery raw material in the sintering furnace (30).

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