A preparation device and preparation process of cobalt-free oxide positive electrode material

Abstract

The present invention discloses a preparation device for a cobalt-free oxide positive electrode material and a preparation process thereof. The preparation device comprises a material conveying mechanism supported by a supporting transmission mechanism. A first-level multi-point feeding mechanism, a first-level swinging material spreading mechanism, a first-level sintering chamber, a first-level flipping unloading mechanism, a second-level multi-point feeding mechanism, a second-level swinging material spreading mechanism, a second-level sintering chamber and a second-level flipping unloading mechanism are arranged at intervals in the extension direction of the material conveying mechanism. The two interruptions of the supporting transmission mechanism are connected by a first-level stepping drive mechanism and a second-level stepping drive mechanism. The preparation process of the present invention is realized based on the above-mentioned equipment, and the first-level material and the second-level material are loaded, conveyed, sintered and unloaded by the preparation equipment. The present invention improves the efficiency of the preparation of cobalt-free oxide positive electrode materials, avoids waste of materials, prevents the quality of products from declining, and reduces manpower and material resources. The present invention is applicable to the technical field of preparation of battery positive electrode materials.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of battery positive electrode materials, and in particular, relates to a preparation device and a preparation process of a cobalt-free oxide positive electrode material. Background Art

[0002] In the production of batteries, the positive electrode is one of the core components. Since the cobalt-free oxide positive electrode material has a high charging efficiency and can provide strong support for the battery's endurance, it is currently widely used. In the preparation of cobalt-free oxide positive electrode materials, it is necessary to mix the various components that constitute the cobalt-free oxide positive electrode material according to a predetermined ratio, and then load the mixed mixture into the sagger. After that, the sagger is manually shaken so that the mixed material is evenly distributed in the sagger. Next, the sagger is supplied to the sintering chamber so that the mixed material is sintered. After completion, a manipulator is used to transfer the saggers coming out of the sintering chamber one by one to the unloading equipment. By controlling the manipulator to flip, the port of the sagger is facing downward, and the sintered material leaves the sagger under the action of gravity. Then, the sintered material is crushed, bagged and packaged for subsequent use. However, in the actual production process, the entire process is too complicated, and most production lines require secondary sintering of cobalt-free oxide cathode materials, which further reduces production efficiency. In addition, when unloading the sintered materials in the sagger, in most cases some of the materials will adhere to the inner wall of the sagger and cannot leave the sagger smoothly due to the gravity of the materials themselves. In this way, after the sagger leaves the unloading equipment, it is necessary to manually check and clean out the remaining materials in the sagger, which is time-consuming and labor-intensive. Summary of the invention

[0003] The present invention provides a preparation device and a preparation process of a cobalt-free oxide positive electrode material, which are used to improve the preparation efficiency of the cobalt-free oxide positive electrode material, avoid the situation where the sintered material remains after unloading, prevent the waste of materials, and avoid the influence of the residual material on the subsequent sintering operation and the mixing of new materials to reduce the quality, while reducing manpower and material resources.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A preparation device for cobalt-free oxide positive electrode materials comprises a material conveying mechanism in a closed-loop form, a supporting transmission mechanism is arranged outside the material conveying mechanism, and a first-level multi-point feeding mechanism, a first-level swinging material spreading mechanism, a first-level sintering chamber, a first-level flipping unloading mechanism, a second-level multi-point feeding mechanism, a second-level swinging material spreading mechanism, a second-level sintering chamber and a second-level flipping unloading mechanism are arranged at intervals in the extension direction of the material conveying mechanism, the supporting transmission mechanism is in an interrupted state at the first-level multi-point feeding mechanism and the second-level multi-point feeding mechanism, and the two interruption positions are respectively connected via a first-level stepping drive mechanism and a second-level stepping drive mechanism, and the first-level stepping drive mechanism and the second-level stepping drive mechanism are respectively connected in transmission with the corresponding parts of the material conveying mechanism.

[0006] Furthermore, the material conveying mechanism includes a plurality of material placing bowls which are arranged in sequence and constructed in a closed-loop form, the upper end of each material placing bowl is in an open state, and a bowl-shaped joint and a ball joint are respectively constructed at both ends of each material placing bowl, the bowl-shaped joints and the ball joints at the ends close to each other of two adjacent material placing bowls are movably assembled together, and transmission grooves are respectively opened on both sides of the material placing bowl, and the transmission grooves extend from both ends of the material placing bowl along the length direction of the material placing bowl.

[0007] Furthermore, the structures of the first-level multi-point feeding mechanism and the second-level multi-point feeding mechanism are the same. The first-level multi-point feeding mechanism includes a plurality of feeding units arranged above the material conveying mechanism. These feeding units are arranged one-to-one corresponding to a plurality of material placing bowls in a continuous state, and these feeding units are transmission-connected to the first driving unit.

[0008] Furthermore, the feeding unit includes a joint pipe and a feeding pipe which are arranged in sequence from top to bottom and connected via a U-shaped seat, a feeding impeller is rotatably connected between the joint pipe and the feeding pipe, a feeding port is formed between adjacent blades of the feeding impeller, the feeding impeller is assembled on a mounting rod, the axes of the joint pipe, the feeding pipe, the feeding impeller and the mounting rod coincide, a spiral blade extending along its axial direction is constructed on the mounting rod, a trumpet-shaped discharge hopper is constructed at the lower end of the feeding pipe, and a plurality of distribution rods are installed on the mounting rod and at the discharge hopper.

[0009] Furthermore, the first driving unit includes a driven wheel coaxially mounted outside the feeding impeller, and each driven wheel is connected to the driving wheel through a transmission belt, and the driving wheel is coaxially mounted on the output shaft of the first driving motor.

[0010] Furthermore, the first-level swing material spreading mechanism and the second-level swing material spreading mechanism have the same structure, and the first-level swing material spreading mechanism includes two first assembly rails symmetrically arranged on both sides of the corresponding position of the material conveying mechanism, and each of the first assembly rails is movably assembled with a transmission groove on a plurality of continuous material placing bowls, and a hinged ear is constructed on each of the first assembly rails, and the two hinged ears on the two first assembly rails are respectively hinged with an oblique driving member and an oblique elastic arm, and a first connecting seat is hinged at one end of the oblique driving member away from the material placing bowl, and a second connecting seat is hinged at one end of the oblique elastic arm away from the material placing bowl.

[0011] Furthermore, the first-stage flip unloading mechanism and the second-stage flip unloading mechanism have the same structure. The first-stage flip unloading mechanism includes a unloading barrel which is sleeved on the outside of the corresponding part of the material conveying mechanism. A unloading hopper is constructed at the lower end of the unloading barrel. The unloading hopper is connected to the accommodating chamber of the unloading barrel. The unloading barrel is connected to the frame via an adapter installed on its outer wall. A material bowl flipping unit is transmission-connected to the unloading barrel. A reciprocating knocking unit is installed on the unloading barrel. Multiple material bowls of the material conveying mechanism located in the unloading barrel are movably connected to the material bowl flipping unit.

[0012] Furthermore, the material bowl flipping unit includes two outer gear rings which are rotatably connected to the two ends of the discharge barrel, and two second assembly guide rails are symmetrically fixed between the two outer gear rings. Each of the second assembly guide rails is movably assembled with a corresponding transmission groove on the material bowl. A driving rod is arranged outside the discharge barrel, and two driving gears are coaxially installed on the driving rod. The two driving gears are respectively meshed with the two outer gear rings, and a first transmission wheel is coaxially installed on the driving rod.

[0013] Furthermore, the reciprocating knocking unit includes two assembly seats arranged above the unloading barrel, a rotating rod is rotatably connected to each of the assembly seats, a connecting rod is arranged between the two rotating rods, each of the rotating rods is connected to the corresponding end of the connecting rod through a transfer arm, and the axes of the two rotating rods coincide, the axes of the rotating rods are parallel to the axes of the connecting rod, and a second transmission wheel is coaxially installed on one of the rotating rods; a plurality of rocking arms are rotatably installed on the connecting rod along its length direction, and a movable rod is hinged at the lower end of each rocking arm, and the lower end of the movable rod is movably extended into the accommodating cavity through the upper end of the unloading barrel, and a knocking head is installed at the end of the movable rod away from the rocking arm.

[0014] The present invention also discloses a preparation process using the above-mentioned cobalt-free oxide positive electrode material preparation equipment, comprising the following steps:

[0015] Step 1. Mix multiple powdered materials to form primary materials, and transport the primary materials to the primary multi-point feeding mechanism through the auger conveyor. The primary multi-point feeding mechanism supplies the primary materials in batches to the corresponding parts of the material conveying mechanism;

[0016] Step 2. Control the first-level stepping drive mechanism and the second-level stepping drive mechanism to move synchronously, so that the two drive the material conveying mechanism to perform closed-loop stepping motion, until the first-level feeding part of the material conveying mechanism moves to the first-level swing-type material spreading mechanism;

[0017] Step 3. Control the action of the first-stage swing-type material spreading mechanism to evenly shake the first-stage material in the first-stage feeding part of the material conveying mechanism;

[0018] Step 4. Then control the first-stage stepping drive mechanism and the second-stage stepping drive mechanism to move synchronously, so that the shaken first-stage material enters the first-stage sintering chamber along the material conveying mechanism to carry out the sintering process;

[0019] Step 5. Repeat steps 1 to 4, so that the primary material continuously enters the primary sintering chamber along with the material conveying mechanism, until the primary material leaves the primary sintering chamber along with the material conveying mechanism and enters the primary turnover unloading mechanism;

[0020] Step 6. Control the first-stage overturning unloading mechanism to turn over the part of the material conveying mechanism located in the first-stage overturning unloading mechanism, and unload the first-stage material therein;

[0021] Step 7. The primary material is collected and crushed, and then mixed with the remaining powder components to form the secondary material. After mixing, the secondary material is supplied to the corresponding part of the material conveying mechanism through the secondary multi-point feeding mechanism;

[0022] Step 8. With the movement of the material conveying mechanism, the secondary material is conveyed to the secondary swing-type material spreading mechanism, the secondary sintering chamber and the secondary flip-type unloading mechanism in sequence, and the secondary material is shaken, sintered and unloaded in sequence;

[0023] Step 9. After the corresponding part of the material conveying mechanism passes through the secondary flip-type unloading mechanism, the part of the material conveying mechanism moves again to the primary multi-point loading mechanism, and the primary material is loaded again, thereby forming a continuous cycle operation.

[0024] Since the present invention adopts the above structure, compared with the prior art, the technical progress achieved is that: the present invention realizes secondary processing of the mixed powder (primary material and secondary material) through the above preparation equipment, so that the various properties of the obtained cobalt-free oxide positive electrode material can be improved, and since a closed-loop material conveying mechanism is adopted, during the production process, the corresponding parts of the material conveying mechanism are driven by controlling the first-level stepping drive mechanism and the second-level stepping drive mechanism, so that the material conveying mechanism moves along its closed-loop form, and the mixed material is realized in the first-level multi-point feeding mechanism, the first-level swinging material spreading mechanism, the first-level sintering chamber, the first-level flipping unloading mechanism, the second-level multi-point feeding mechanism, the second-level swinging material spreading mechanism, the second-level sintering chamber and the second-level flipping unloading mechanism. The continuous production is improved, thereby improving the production efficiency and ensuring the sufficient sintering of the cobalt-free oxide positive electrode material. The present invention unloads the sintered primary material and secondary material respectively through a primary flip unloading mechanism and a secondary flip unloading mechanism, and knocks the material conveying mechanism at the corresponding position during the unloading process through the primary flip unloading mechanism and the secondary flip unloading mechanism, so that the primary material and the secondary material are fully and quickly separated from the material conveying mechanism to avoid the residual situation. In summary, the present invention improves the efficiency of the preparation of cobalt-free oxide positive electrode materials, avoids the residual situation of sintered materials after unloading, prevents the waste of materials, and avoids the influence of the residual materials and new materials in the subsequent sintering operation. The quality is reduced, and at the same time, manpower and material resources are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] In the attached picture:

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of two material placing bowls after being separated in the material conveying mechanism of an embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the corresponding arrangement of a first-level stepping drive mechanism, a first-level multi-point feeding mechanism and a local material conveying mechanism in an embodiment of the present invention;

[0030] Figure 4 It is a structural front view of the transmission connection between the primary stepping drive mechanism and the local material conveying mechanism of the embodiment of the present invention;

[0031] Figure 5It is a partial structural schematic diagram of a first-level stepping drive mechanism according to an embodiment of the present invention;

[0032] Figure 6 This is a structural schematic diagram of a first-level multi-point feeding mechanism according to an embodiment of the present invention;

[0033] Figure 7 It is an axial structural cross-sectional view of a single feeding unit in a first-level multi-point feeding mechanism according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic structural diagram of a feeding unit according to an embodiment of the present invention without a joint pipe and a feeding pipe;

[0035] Fig. 9 It is a structural schematic diagram of the transmission connection between the primary swing-type material spreading mechanism and the local material conveying mechanism according to an embodiment of the present invention;

[0036] Fig.10 It is a structural front view of the first-level swing-type material spreading mechanism and the local material conveying mechanism in driving connection with each other in an embodiment of the present invention;

[0037] Fig.11 It is a structural schematic diagram of the corresponding arrangement of the first-level overturning unloading mechanism and the local material conveying mechanism in an embodiment of the present invention;

[0038] Fig.12 for Fig.11 A schematic diagram of another angle of the structure shown;

[0039] Fig.13 It is a structural front view of the corresponding arrangement of the first-level overturning unloading mechanism and the local material conveying mechanism in an embodiment of the present invention;

[0040] Fig.14 This is a structural schematic diagram of a first-level overturning type unloading mechanism according to an embodiment of the present invention;

[0041] Fig.15 for Fig.14 A schematic diagram of another angle of the structure shown;

[0042] Fig.16 It is a schematic structural diagram of a reciprocating knocking unit in a first-level flip-type unloading mechanism according to an embodiment of the present invention.

[0043] Labeled parts: 100-Material conveying mechanism, 101-Material placing bowl, 102-Transmission groove, 103-Bowl joint, 104-Ball joint, 200-Support transmission mechanism, 201-Annular support seat, 202-Lateral support wheel, 300-One-stage multi-point feeding mechanism, 301-Feeding unit, 3011-Joint pipe, 3012-Feeding pipe, 3013-Discharge hopper, 3014-U-shaped seat, 3015-Mounting rod, 3016-Feeding impeller, 3017- Feeding port, 3018-spiral blade, 3019-distributing rod, 302-first driving motor, 303-driving wheel, 304-driven wheel, 305-transmission belt, 400-first stepping driving mechanism, 401-fixed seat, 402-shaft rod, 403-driving wheel, 404-transmission sprocket, 405-second driving motor, 406-transmission chain, 500-first swinging material spreading mechanism, 501-first assembly guide rail, 502-hinged ear, 503-first connecting Connecting seat, 504-second connecting seat, 505-oblique driving member, 506-oblique tube, 507-oblique rod, 508-connecting spring, 600-first sintering chamber, 700-first flip unloading mechanism, 701-unloading cylinder, 702-accommodating chamber, 703-adapter seat, 704-material bowl flip unit, 7041-outer gear ring, 7042-second assembly guide rail, 7043-driving rod, 7044-driving gear, 7045-first transmission wheel, 705-reciprocating Type knocking unit, 7051-assembly seat, 7052-rotating rod, 7053-adapting arm, 7054-connecting rod, 7055-second transmission wheel, 7056-rocker, 7057-adapting sleeve, 7058-movable rod, 7059-knocking head, 706-discharging hopper, 800-secondary multi-point feeding mechanism, 900-secondary stepping driving mechanism, 1000-secondary swinging spreading mechanism, 1100-secondary sintering chamber, 1200-secondary flipping unloading mechanism. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] The present invention discloses a preparation device for a cobalt-free oxide positive electrode material, such as Figure 1-16As shown, it includes a material conveying mechanism 100 in a closed loop form, and a supporting transmission mechanism 200 is arranged outside the material conveying mechanism 100. The supporting transmission mechanism 200 is used to support the material conveying mechanism 100 and ensure that the material conveying mechanism 100 remains smooth during movement to avoid jamming, deflection, etc. In the extension direction of the material conveying mechanism 100, a primary multi-point feeding mechanism 300, a primary swing-type material spreading mechanism 500, a primary sintering chamber 600, a primary flip-type unloading mechanism 700, a secondary multi-point feeding mechanism 800, a secondary swing-type material spreading mechanism 1000, a secondary sintering chamber 1100 and a secondary flip-type unloading mechanism 1200 are arranged at intervals. Among them, the supporting transmission mechanism 200 is in an interrupted state at the first-level multi-point feeding mechanism 300 and the second-level multi-point feeding mechanism 800, and these two interrupted positions are respectively connected by the first-level stepping drive mechanism 400 and the second-level stepping drive mechanism 900. The first-level stepping drive mechanism 400 and the second-level stepping drive mechanism 900 are respectively connected to the corresponding parts of the material conveying mechanism 100 by transmission. The working principle and advantages of the present invention are as follows: the present invention realizes secondary processing of the mixed powder (primary material and secondary material) through the above-mentioned preparation equipment, so that the various properties of the obtained cobalt-free oxide positive electrode material can be improved, and because a closed-loop material conveying mechanism 100 is adopted, during the production process, the corresponding parts of the material conveying mechanism 100 are driven by controlling the first-level stepping drive mechanism 400 and the second-level stepping drive mechanism 900, so that the material conveying mechanism 100 moves along its closed-loop form, and the mixed material is realized in the first-level multi-point feeding mechanism 300, the first-level swinging material spreading mechanism 500, the first-level sintering chamber 600, the first-level flipping unloading mechanism 700, the second-level multi-point feeding mechanism 800, the second-level swinging material spreading mechanism 1000, the second-level sintering chamber 1100 and the second-level flipping unloading mechanism 1200. The step-by-step rotation is improved, thereby improving the continuity of production, thereby improving the production efficiency, and ensuring the sufficient sintering of the cobalt-free oxide positive electrode material. The present invention unloads the sintered primary material and secondary material respectively through the primary flip unloading mechanism 700 and the secondary flip unloading mechanism 1200, and knocks the material conveying mechanism 100 at the corresponding position during the unloading process through the primary flip unloading mechanism 700 and the secondary flip unloading mechanism 1200, so that the primary material and the secondary material are fully and quickly separated from the material conveying mechanism 100 to avoid the residual situation. In summary, the present invention improves the efficiency of the preparation of cobalt-free oxide positive electrode materials, avoids the residual situation of sintered materials after unloading, prevents the waste of materials, and avoids the influence of the residual materials and new materials in the subsequent sintering operation. The quality is reduced, and at the same time, manpower and material resources are reduced.

[0046] As a preferred embodiment of the present invention, Figure 2As shown, the material conveying mechanism 100 includes a plurality of material placing bowls 101, and these material placing bowls 101 are arranged in sequence and constructed in a closed loop form. The upper end of each material placing bowl 101 is in an open state, and a bowl-shaped joint 103 and a ball joint 104 are respectively constructed at both ends of each material placing bowl 101, and the bowl-shaped joints 103 and the ball joints 104 at the ends close to each other of two adjacent material placing bowls 101 are movably assembled together. In this embodiment, transmission grooves 102 are respectively opened on both sides of the material placing bowl 101, and each transmission groove 102 extends from both ends of the material placing bowl 101 along the length direction of the material placing bowl 101. In this embodiment, adjacent material placing bowls 101 are connected together in sequence through the bowl-shaped joints 103 and the ball joints 104 to form a continuous closed loop structure. Figure 1 , 12 As shown, the support transmission mechanism 200 includes two annular support seats 201, which are respectively arranged on the inner and outer sides of the material conveying mechanism 100. A plurality of lateral support wheels 202 are installed at intervals along the extension direction of each annular support seat 201, and each lateral support wheel 202 rolls in the transmission groove 102 of the corresponding material placing bowl 101. In the process of controlling the first-level stepping drive mechanism 400 and the second-level stepping drive mechanism 900 to drive the material conveying mechanism 100 to move, each material placing bowl 101 in the material conveying mechanism 100 moves along the extension direction of the material conveying mechanism 100. At this time, the lateral support wheels 202 on both sides of the material placing bowl 101 provide lateral support to the material placing bowl 101, thereby preventing the material placing bowl 101 from tipping over. Moreover, under the action of the lateral support wheels 202, the movement of the material placing bowl 101 is smoother, thereby preventing the material placing bowl 101 from jamming.

[0047] As a preferred embodiment of the present invention, Figure 3-5As shown, a first-stage stepping drive mechanism 400 and a second-stage stepping drive mechanism 900 are shown. This embodiment takes the first-stage stepping drive mechanism 400 as an example to demonstrate the structure. The first-stage stepping drive mechanism 400 includes two fixed seats 401 mounted on the frame, and the two fixed seats 401 are respectively arranged on both sides of the material conveying mechanism 100. On each fixed seat 401, multiple shafts 402 are connected to rotate at intervals in a straight line direction, and a driving wheel 403 is installed on each shaft 402, and all shafts 402 are driven by the second driving unit to rotate, and each driving wheel 403 rolls on the corresponding end face of the transmission groove 102 of the corresponding material bowl 101. The second driving unit of this embodiment includes a second driving motor 405, and the output shaft of the second driving motor 405 is coaxially connected to one of the shafts 402; a transmission sprocket 404 is coaxially installed on each shaft 402, and all the transmission sprockets 404 are connected through a transmission chain 406. This embodiment controls the two second drive motors 405 to move synchronously, so that each second drive motor 405 drives the shaft 402 connected thereto to rotate, and under the transmission of the transmission sprocket 404 and the transmission chain 406, all the shafts 402 rotate synchronously, so that the drive wheels 403 located on both sides of the material bowl 101 push the material bowl 101 forward during the relative rotation, and control the action time of the second drive motor 405 so that the forward distance of the material bowl 101 is fixed, so as to achieve the purpose of stepping action, and then drive the material bowl 101 to move from this station to the next station. In addition, this embodiment uses a first-level stepping drive mechanism 400 and a second-level stepping drive mechanism 900 to synchronously drive the material conveying mechanism 100, so as to ensure the smoothness of the movement of the material conveying mechanism 100 and provide stable kinetic energy for the movement of the material conveying mechanism 100.

[0048] As a preferred embodiment of the present invention, Figure 3 , 6As shown in Figures 7 and 8, the structures of the first-level multi-point feeding mechanism 300 and the second-level multi-point feeding mechanism 800 are the same. This embodiment takes the first-level multi-point feeding mechanism 300 as an example to demonstrate the structure. The first-level multi-point feeding mechanism 300 includes a first driving unit and a plurality of feeding units 301, which are arranged above the material conveying mechanism 100 at intervals, and these feeding units 301 are arranged one by one corresponding to a plurality of material placing bowls 101 in a continuous state. The first driving unit is connected to these feeding units 301 in a transmission manner, and the inlet end of each feeding unit 301 is connected to the outlet end of the auger conveyor. By controlling the action of the auger conveyor, the auger conveyor supplies the pre-mixed material to the feeding unit 301. The feeding unit 301 of this embodiment includes a joint pipe 3011, a feeding pipe 3012, a feeding impeller 3016 and a mounting rod 3015, wherein the joint pipe 3011 and the feeding pipe 3012 are arranged in sequence from top to bottom, and the two are connected together through two symmetrically arranged U-shaped seats 3014. The feeding impeller 3016 is rotatably connected between the joint pipe 3011 and the feeding pipe 3012, and a feeding port 3017 is formed between adjacent blades of the feeding impeller 3016. The feeding impeller 3016 is assembled on the mounting rod 3015, and the axes of the joint pipe 3011, the feeding pipe 3012, the feeding impeller 3016 and the mounting rod 3015 coincide. In this embodiment, a spiral blade 3018 extending along the axial direction is configured on the mounting rod 3015, a trumpet-shaped discharge hopper 3013 is configured at the lower end of the feeding pipe 3012, and a plurality of distribution rods 3019 are installed on the mounting rod 3015 and at the discharge hopper 3013. The first driving unit of this embodiment includes a first driving motor 302, a driving wheel 303 is coaxially mounted on the output shaft of the first driving motor 302, a driven wheel 304 is coaxially mounted outside each feeding impeller 3016, and each driven wheel 304 is connected to the driving wheel 303 through a transmission belt 305, and the driving wheel 303 and the driven wheel 304 can be sprocket wheels or synchronous belt wheels, and the transmission belt 305 can be a chain or a synchronous belt (toothed belt). The working principle and advantages of this embodiment are: this embodiment controls the first driving motor 302 to drive each feeding impeller 3016 to drive the corresponding mounting rod 3015 to rotate through the driving wheel 303, the driven wheel 304 and the transmission belt 305, so that the powdered material entering the joint pipe 3011 is transported to the feeding pipe 3012 through the feeding impeller 3016, and then gradually transported to the discharge hopper 3013 under the action of the spiral blade 3018, and is evenly distributed to the material placing bowl 101 by being disturbed by the distribution rod 3019. This embodiment can perform synchronous feeding of multiple continuous material placing bowls 101, thereby improving the feeding efficiency.

[0049] As a preferred embodiment of the present invention, Fig. 9 , 10As shown, the structures of the primary swing material spreading mechanism 500 and the secondary swing material spreading mechanism 1000 are the same. This embodiment takes the primary swing material spreading mechanism 500 as an example to demonstrate the structure. The primary swing material spreading mechanism 500 includes an oblique driving member 505, an oblique elastic arm and two first assembly guide rails 501, which are symmetrically arranged on both sides of the corresponding part of the material conveying mechanism 100, and each first assembly guide rail 501 is movably assembled in a transmission groove 102 on a plurality of continuous material placing bowls 101. A hinged ear 502 is constructed on each first assembly guide rail 501, the oblique driving member 505 is hinged to the hinged ear 502 on one of the first assembly guide rails 501, and the oblique elastic arm is hinged to the hinged ear 502 on the other first assembly guide rail 501; a first connecting seat 503 is hinged at one end of the oblique driving member 505 away from the material placing bowl 101, and a second connecting seat 504 is hinged at one end of the oblique elastic arm away from the material placing bowl 101. The oblique elastic arm includes an oblique tube 506 and an oblique rod 507 which are movably connected to each other. The ends of the oblique tube 506 and the oblique rod 507 which are away from each other are respectively hinged to the second connecting seat 504 and the hinged ear 502. A connecting spring 508 is sleeved on the outside of the oblique rod 507. The two ends of the connecting spring 508 are respectively connected to the oblique rod 507 and the oblique tube 506. The working principle and advantages of this embodiment are as follows: when the material placing bowl 101 loaded with powder material moves to the first-level swing material spreading mechanism 500 or the second-level swing material spreading mechanism 1000, the two first assembly guide rails 501 are respectively movably assembled in the transmission grooves 102 on both sides of the plurality of material placing bowls 101 at the position, and then the oblique driving member 505 is controlled to perform a reciprocating telescopic movement. The oblique driving member 505 is generally a cylinder or an electric cylinder. The oblique driving member 505 drives the material placing bowl 101 to swing through the first assembly guide rail 501 connected thereto. Generally, the material placing bowl 101 is composed of a bowl-shaped joint 103 and a spherical joint. The center line of the joint 104 coincides with the axis of swing, and at the same time, the oblique elastic arm elastically expands and contracts, and the inclination angle of the oblique elastic arm changes, so as to adapt to the swing of the material placing bowl 101; after the material placing bowl 101 swings back and forth many times, the powdered material therein is gradually shaken flat and evenly distributed into the material placing bowl 101 to ensure the adequacy of subsequent sintering. Since the support transmission mechanism 200 is interrupted at this position and continued by the first-level swinging material spreading mechanism 500 or the second-level swinging material spreading mechanism 1000, it is ensured that the material placing bowl 101 will not be hindered by external objects during the swinging process.

[0050] As a preferred embodiment of the present invention, Figure 11-16As shown, the structures of the first-stage flip unloading mechanism 700 and the second-stage flip unloading mechanism 1200 are the same. This embodiment takes the first-stage flip unloading mechanism 700 as an example to demonstrate the structure. The first-stage flip unloading mechanism 700 includes a discharge barrel 701, a material bowl flip unit 704 and a reciprocating knocking unit 705, wherein the discharge barrel 701 is set on the outside of the corresponding part of the material conveying mechanism 100, that is, during the movement of the material conveying mechanism 100, a certain number of material bowls 101 pass through the discharge barrel 701 in a step-by-step manner. A discharge hopper 706 is constructed at the lower end of the discharge barrel 701, and the discharge hopper 706 is connected to the accommodating chamber 702 of the discharge barrel 701; adapter seats 703 are respectively installed on both sides of the outer wall of the discharge barrel 701, and these two adapter seats 703 are connected to the frame. The bowl flip unit 704 of this embodiment is connected to the discharge barrel 701 by transmission, and the reciprocating knocking unit 705 is installed on the discharge barrel 701. The material conveying mechanism 100 is located in the discharge barrel 701. The multiple bowls 101 are all movably connected to the bowl flip unit 704, that is, the transmission grooves 102 on both sides of each bowl 101 are respectively movably assembled with the following two second assembly guide rails 7042 in the discharge barrel 701. The working principle and advantages of this embodiment are: when multiple continuous bowls 101 carrying sintering materials enter the discharge barrel 701, the bowl flip unit 704 is controlled to operate so that these bowls 101 flip 180 degrees, and the bowl 101 flips with the center line of the bowl joint 103 and the ball joint 104 as the axis, and most of the sintering materials are separated from the bowl 101 under the action of gravity, and then discharged through the discharge hopper 706. At the same time, the reciprocating knocking unit 705 is controlled to act so that the reciprocating knocking unit 705 synchronously knocks on each material placing bowl 101 in the discharge barrel 701, so as to prompt the compacted materials that have not separated from the material placing bowl 101 to separate quickly and completely; after complete unloading, the material placing bowl flipping unit 704 is controlled to act so that these material placing bowls 101 flip back to their original positions; the collected sintered materials are crushed and finely screened, and the remaining components are added and mixed thoroughly, and then collected in a buffer tank, and the materials in the buffer tank are supplied to the material placing tank through another auger conveyor, and the material placing tank provides materials for the secondary multi-point feeding mechanism 800.

[0051] As a preferred embodiment of the present invention, Figure 12-14As shown, the material bowl flip unit 704 includes two outer gear rings 7041 that are respectively rotatably connected to the two ends of the discharge barrel 701, and two second assembly guide rails 7042 are symmetrically fixed between the two outer gear rings 7041. The two second assembly guide rails 7042 are both located in the discharge barrel 701, and the second assembly guide rails 7042 and the discharge barrel 701 are in a non-connected state; each second assembly guide rail 7042 extends along the axial direction of the discharge barrel 701, and each second assembly guide rail 7042 is movably assembled in the transmission groove 102 on the corresponding material bowl 101. In this embodiment, a driving rod 7043 is provided outside the discharge barrel 701, and the driving rod 7043 is connected to the discharge barrel 701 through an adapter plate, and the driving rod 7043 is rotatably connected to the adapter plate. Two driving gears 7044 are coaxially mounted on the driving rod 7043, and the two driving gears 7044 are respectively meshed with the two outer gear rings 7041, and a first transmission wheel 7045 is coaxially mounted on the driving rod 7043. In this embodiment, by driving the first transmission wheel 7045 to rotate, the driving rod 7043 drives the two driving gears 7044 to rotate, and then the two outer gear rings 7041 drive the two second assembly guide rails 7042 to rotate along the axis of the discharge barrel 701, so that the multiple material placing bowls 101 movably connected to the two second assembly guide rails 7042 rotate synchronously until the material placing bowls 101 are flipped 180 degrees.

[0052] As a preferred embodiment of the present invention, Fig.15 , 16As shown, the reciprocating knocking unit 705 includes two assembly seats 7051, and the two assembly seats 7051 are arranged above the discharge barrel 701, and a rotating rod 7052 is rotatably connected to each assembly seat 7051, and a connecting rod 7054 is arranged between the two rotating rods 7052, each rotating rod 7052 is connected to the corresponding end of the connecting rod 7054 through a transfer arm 7053, and the axes of the two rotating rods 7052 coincide, and the axis of the rotating rod 7052 is parallel to the axis of the connecting rod 7054, and a second transmission wheel 7055 is coaxially installed on one of the rotating rods 7052. In this embodiment, a plurality of rocking arms 7056 are arranged at intervals along the length direction of the connecting rod 7054, and an adapter sleeve 7057 is constructed at the upper end of each rocking arm 7056, and the adapter sleeve 7057 is rotatably mounted on the corresponding position of the connecting rod 7054; a movable rod 7058 is hinged at the lower end of each rocking arm 7056, and the lower end of each movable rod 7058 vertically passes through the upper end of the unloading barrel 701 and movably extends into the accommodating chamber 702, and a knocking head 7059 is installed at the end of the movable rod 7058 away from the rocking arm 7056. When the material bowl flip unit 704 drives the material bowl 101 to flip 180 degrees, so that the opening end of the material bowl 101 faces downward and the bottom faces upward, the second transmission wheel 7055 is driven to rotate. The second transmission wheel 7055 rotates through the rotating rod 7052 during the rotation process. The rotating rod 7052 drives the connecting rod 7054 to rotate along the axis of the rotating rod 7052 through the transfer arm 7053, so that the connecting rod 7054 drives the movable rod 7058 to perform vertical reciprocating motion through the rocker 7056, and then the movable rod 7058 reciprocates against the bottom end surface of the flipped material bowl 101 through the knocking head 7059. The knocking head 7059 of this embodiment is a structure made of elastic rubber or silicone material, so as to avoid damage to the material bowl 101 during the knocking process.

[0053] The present invention also discloses a preparation process using the above-mentioned cobalt-free oxide positive electrode material preparation equipment, comprising the following steps:

[0054] Step 1. Mix multiple powdered materials to form primary materials, and convey the primary materials to the primary multi-point feeding mechanism 300 through the auger conveyor. The primary multi-point feeding mechanism 300 supplies the primary materials in batches to the corresponding parts of the material conveying mechanism 100;

[0055] Step 2. Control the first-level stepping drive mechanism 400 and the second-level stepping drive mechanism 900 to move synchronously, so that the two drive the material conveying mechanism 100 to perform closed-loop stepping motion until the first-level material loading position of the material conveying mechanism 100 moves to the first-level swing-type material spreading mechanism 500;

[0056] Step 3. Control the first-level swing material spreading mechanism 500 to evenly shake the first-level material in the first-level feeding part of the material conveying mechanism 100;

[0057] Step 4. Control the first-stage stepping drive mechanism 400 and the second-stage stepping drive mechanism 900 to move synchronously, so that the shaken first-stage material enters the first-stage sintering chamber 600 along the material conveying mechanism 100 to perform the sintering process;

[0058] Step 5. Repeat steps 1 to 4, so that the primary material continuously enters the primary sintering chamber 600 along with the material conveying mechanism 100, until the primary material leaves the primary sintering chamber 600 along with the material conveying mechanism 100 and enters the primary turnover unloading mechanism 700;

[0059] Step 6. Control the first-stage flip unloading mechanism 700 to move, flip the portion of the material conveying mechanism 100 located inside the first-stage flip unloading mechanism 700, and unload the first-stage material therein;

[0060] Step 7. After the primary material is collected and crushed, it is mixed with the remaining powder components to form a secondary material, and after mixing, the secondary material is supplied to the corresponding part of the material conveying mechanism 100 through the secondary multi-point feeding mechanism 800;

[0061] Step 8. With the movement of the material conveying mechanism 100, the secondary material is sequentially conveyed to the secondary swing-type material spreading mechanism 1000, the secondary sintering chamber 1100 and the secondary flip-type unloading mechanism 1200, and the secondary material is sequentially shaken, sintered and unloaded;

[0062] Step 9. After the corresponding part of the material conveying mechanism 100 passes through the secondary flip-type unloading mechanism 1200, the corresponding part of the material conveying mechanism 100 moves to the primary multi-point loading mechanism 300 again, and the primary material is loaded again, thereby forming a continuous cycle operation.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A preparation device for a cobalt-free oxide positive electrode material, characterized in that: The invention comprises a material conveying mechanism in a closed-loop form, a supporting transmission mechanism is arranged on the outer side of the material conveying mechanism, a first-level multi-point feeding mechanism, a first-level swinging material spreading mechanism, a first-level sintering chamber, a first-level flipping unloading mechanism, a second-level multi-point feeding mechanism, a second-level swinging material spreading mechanism, a second-level sintering chamber and a second-level flipping unloading mechanism are arranged at intervals in the extension direction of the material conveying mechanism, the supporting transmission mechanism is in an interrupted state at the first-level multi-point feeding mechanism and the second-level multi-point feeding mechanism, and the two interrupted positions are respectively connected by a first-level stepping drive mechanism and a second-level stepping drive mechanism, and the first-level stepping drive mechanism and the second-level stepping drive mechanism are respectively connected to the corresponding parts of the material conveying mechanism in a transmission manner; the material conveying mechanism comprises a plurality of material placing bowls which are arranged in sequence and constructed in a closed-loop form, the upper end of each material placing bowl is in an open state, a bowl-shaped joint and a ball joint are respectively constructed at the two ends of each material placing bowl, the bowl-shaped joints and the ball joints at the ends close to each other of two adjacent material placing bowls are movably assembled together, and two material placing bowls are respectively opened on both sides of the material placing bowl. A transmission groove, wherein the transmission groove extends from both ends of the material placing bowl along the length direction of the material placing bowl; the structures of the first-stage flip unloading mechanism and the second-stage flip unloading mechanism are the same, the first-stage flip unloading mechanism comprises a unloading barrel sleeved on the outside of the corresponding part of the material conveying mechanism, a unloading hopper is constructed at the lower end of the unloading barrel, the unloading hopper is communicated with the accommodating cavity of the unloading barrel, the unloading barrel is connected to the frame via a transfer seat installed on its outer wall, a material bowl flipping unit is transmission-connected to the unloading barrel, and a reciprocating knocking unit is installed on the unloading barrel, The material conveying mechanism is located in a plurality of material bowls in the discharge barrel, all of which are movably connected to a material bowl flipping unit; the material bowl flipping unit includes two outer gear rings which are respectively rotatably connected to the two ends of the discharge barrel, and two second assembly guide rails are symmetrically fixed between the two outer gear rings, and each of the second assembly guide rails is movably assembled with a transmission groove on the corresponding material bowl, and a driving rod is arranged outside the discharge barrel, and two driving gears are coaxially mounted on the driving rod, and the two driving gears are respectively meshed with the two outer gear rings, and a first transmission wheel is coaxially mounted on the driving rod.

2. The preparation device of a cobalt-free oxide positive electrode material according to claim 1, characterized in that: The first-level multi-point feeding mechanism and the second-level multi-point feeding mechanism have the same structure. The first-level multi-point feeding mechanism includes a plurality of feeding units arranged above the material conveying mechanism. These feeding units are arranged one-to-one corresponding to a plurality of material placing bowls in a continuous state, and these feeding units are transmission-connected to the first driving unit.

3. The preparation device of a cobalt-free oxide positive electrode material according to claim 2, characterized in that: The feeding unit includes a joint pipe and a feeding pipe which are arranged in sequence from top to bottom and connected via a U-shaped seat, a feeding impeller is rotatably connected between the joint pipe and the feeding pipe, a feeding port is formed between adjacent blades of the feeding impeller, the feeding impeller is assembled on a mounting rod, the axes of the joint pipe, the feeding pipe, the feeding impeller and the mounting rod coincide, a spiral blade extending along its axial direction is constructed on the mounting rod, a trumpet-shaped discharge hopper is constructed at the lower end of the feeding pipe, and a plurality of distribution rods are installed on the mounting rod and at the discharge hopper.

4. The preparation device of a cobalt-free oxide positive electrode material according to claim 3, characterized in that: The first driving unit comprises a driven wheel coaxially mounted outside the material conveying impeller, and each driven wheel is connected to the driving wheel through a transmission belt, and the driving wheel is coaxially mounted on the output shaft of the first driving motor.

5. The preparation device of a cobalt-free oxide positive electrode material according to claim 1, characterized in that: The structures of the first-level swing material spreading mechanism and the second-level swing material spreading mechanism are the same. The first-level swing material spreading mechanism includes two first assembly guide rails symmetrically arranged on both sides of the corresponding position of the material conveying mechanism. Each of the first assembly guide rails is movably assembled with a transmission groove on a plurality of continuous material placing bowls. A hinged ear is constructed on each of the first assembly guide rails. The two hinged ears on the two first assembly guide rails are respectively hinged with an oblique driving member and an oblique elastic arm. A first connecting seat is hinged at one end of the oblique driving member away from the material placing bowl, and a second connecting seat is hinged at one end of the oblique elastic arm away from the material placing bowl.

6. The preparation device of a cobalt-free oxide positive electrode material according to claim 1, characterized in that: The reciprocating knocking unit includes two assembly seats arranged above the discharge barrel, a rotating rod is rotatably connected to each of the assembly seats, a connecting rod is arranged between the two rotating rods, each of the rotating rods is connected to the corresponding end of the connecting rod through a transfer arm, and the axes of the two rotating rods coincide, the axes of the rotating rods are parallel to the axes of the connecting rod, and a second transmission wheel is coaxially installed on one of the rotating rods; a plurality of rocking arms are rotatably installed on the connecting rod along its length direction, and a movable rod is hinged at the lower end of each rocking arm, and the lower end of the movable rod is movably extended into the accommodating cavity through the upper end of the discharge barrel, and a knocking head is installed at the end of the movable rod away from the rocking arm.

7. A preparation process using the preparation equipment of any one of claims 1 to 6, characterized in that: The steps include: Step 1. Mix multiple powdered materials to form primary materials, and transport the primary materials to the primary multi-point feeding mechanism through the auger conveyor. The primary multi-point feeding mechanism supplies the primary materials in batches to the corresponding parts of the material conveying mechanism; Step 2. Control the first-level stepping drive mechanism and the second-level stepping drive mechanism to move synchronously, so that the two drive the material conveying mechanism to perform closed-loop stepping motion, until the first-level feeding part of the material conveying mechanism moves to the first-level swing-type material spreading mechanism; Step 3. Control the action of the first-stage swing-type material spreading mechanism to evenly shake the first-stage material in the first-stage feeding part of the material conveying mechanism; Step 4. Then control the first-stage stepping drive mechanism and the second-stage stepping drive mechanism to move synchronously, so that the shaken first-stage material enters the first-stage sintering chamber along the material conveying mechanism to carry out the sintering process; Step 5. Repeat steps 1 to 4, so that the primary material continuously enters the primary sintering chamber along with the material conveying mechanism, until the primary material leaves the primary sintering chamber along with the material conveying mechanism and enters the primary turnover unloading mechanism; Step 6. Control the first-stage overturning unloading mechanism to turn over the part of the material conveying mechanism located in the first-stage overturning unloading mechanism, and unload the first-stage material therein; Step 7. The primary material is collected and crushed, and then mixed with the remaining powder components to form a secondary material. After mixing, the secondary material is supplied to the corresponding part of the material conveying mechanism through the secondary multi-point feeding mechanism; Step 8. With the movement of the material conveying mechanism, the secondary material is sequentially conveyed to the secondary swing-type material spreading mechanism, the secondary sintering chamber and the secondary flip-type unloading mechanism, and the secondary material is sequentially shaken, sintered and unloaded; Step 9. After the corresponding part of the material conveying mechanism passes through the secondary flip-type unloading mechanism, the part of the material conveying mechanism moves again to the primary multi-point loading mechanism, and the primary material is loaded again, thereby forming a continuous cycle operation.

Images