CN115371429A

CN115371429A - Lithium ion battery anode material kiln sintering system and method

Info

Publication number: CN115371429A
Application number: CN202210726491.2A
Authority: CN
Inventors: 黄光豪; 王英男; 朱永科; 李和敏; 李长东
Original assignee: Hunan Brunp Recycling Technology Co Ltd; Guangdong Brunp Recycling Technology Co Ltd
Current assignee: Hunan Brunp Recycling Technology Co Ltd; Guangdong Brunp Recycling Technology Co Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-11-22
Also published as: WO2023245896A1; FR3137166A1

Abstract

The invention provides a kiln sintering system and a kiln sintering method for an anode material of a lithium ion battery. The sintering system of the lithium ion battery anode material kiln comprises a kiln main body, a sagger, an external circulation conveying line, a bowl loading device, a lifting combination device and a bowl unloading separation device, wherein a material conveying inlet and a material conveying outlet are formed in the kiln main body; the sagger is provided with a filling groove; the external circulation conveying line is arranged at the top of the kiln main body and used for conveying the saggars to move, and a loading area and a vibration leveling partition area are sequentially arranged on the external circulation conveying line along the conveying direction; the sagger loading device is used for loading materials to be sintered into the loading groove in the loading area, so that the sintering process of the anode material kiln is realized, the saggers are circularly circulated in a three-dimensional space, the quantity of the saggers is reduced, the use cost of the saggers is reduced, and the saggers in all sections in the circulating process are low in treatment capacity.

Description

Lithium ion battery anode material kiln sintering system and method

Technical Field

The invention relates to the technical field of lithium ion battery anode material sintering, in particular to a kiln sintering system and a kiln sintering method for an anode material of a lithium ion battery.

Background

The lithium ion battery has the characteristics of energy storage, rapid charge and discharge, long cycle life, environmental friendliness and the like, and is widely applied to the fields of 3C, power batteries and energy storage. The positive electrode material plays a crucial factor for the performance of the lithium ion battery, such as lithium cobaltate, lithium manganate, lithium iron phosphate, ternary positive electrode materials and the like. The production process of the anode material mainly adopts a high-temperature solid-phase method process for production. In the high-temperature solid-phase process, the sintering process is the most important process, and a sagger is used as a carrier of a mixed material of a precursor of the cathode material and a lithium source in the sintering process.

For the design of the kiln for the anode material of the lithium ion battery, in order to effectively increase the energy utilization rate in the sintering process, the number of saggars is increased on the premise of allowing the space of the kiln, so that the use cost of the saggars is higher, the saggars in each section of the saggar circulation process are larger in treatment capacity, and meanwhile, the occupied area of a kiln sintering system is larger.

Disclosure of Invention

The invention aims to solve the problems that the conventional kiln sintering system has high sagger use cost, large sagger treatment capacity of each section in the sagger circulation process and large floor area, and provides a kiln sintering system and a kiln sintering method for a positive electrode material of a lithium ion battery.

The purpose of the invention is realized by the following technical scheme:

a kiln sintering system for a positive electrode material of a lithium ion battery, comprising:

the kiln comprises a kiln main body, a kiln cover and a kiln cover, wherein a material conveying inlet and a material conveying outlet are formed in the kiln main body, the kiln main body is provided with a conveying mechanism, and two ends of the conveying mechanism at least extend to the material conveying inlet and the material conveying outlet respectively;

a sagger formed with a filling groove;

the external circulation conveying line is arranged at the top of the kiln main body and used for conveying saggers to move, and a charging area and a vibration leveling dividing area are sequentially arranged on the external circulation conveying line along the conveying direction;

the loading device is arranged above the loading area and used for loading the material to be sintered into the loading groove in the loading area;

the lifting combination device is arranged adjacent to the outer circulation conveying line and used for conveying the saggars of the outer circulation conveying line to the conveying mechanism to be stacked to form a saggar stacking assembly; the conveying mechanism is used for conveying the bowl stacking assembly into the kiln main body from the conveying inlet for sintering, and conveying the sintered bowl stacking assembly into the conveying outlet from the kiln main body;

and the sagger unloading and separating device is arranged adjacent to the external circulation conveying line and is used for respectively unloading saggers of the sagger stacking assembly on the conveying mechanism and conveying the saggers to the external circulation conveying line.

In one embodiment, the feeding inlet and the feeding outlet are formed at two ends of the kiln body, respectively, and two ends of the conveying mechanism extend to the feeding inlet and the feeding outlet, respectively.

In one embodiment, the conveying mechanism comprises a plurality of kiln roller rods arranged at intervals.

In one embodiment, the outer peripheral wall of each kiln roller rod is convexly provided with a limiting ring protrusion, the bottom of the saggar is provided with a limiting groove, and the limiting ring protrusion is positioned in the limiting groove and is in rolling connection with the saggar.

In one embodiment, a mounting frame is arranged at the top of the kiln main body, the outer circulation conveying line comprises a driving motor, a conveying belt, a first roller and a second roller, the driving motor is arranged on the mounting frame, the first roller and the second roller are rotatably connected to the mounting frame, the conveying belt is respectively sleeved on the first roller and the second roller, a power output shaft of the driving motor is connected with one end of the first roller, and the conveying belt is used for conveying saggars to move.

In one embodiment, the lifting assembly includes a first lifting and carrying mechanism disposed adjacent to the outer circulation conveying line and the kiln body, and a pick and place mechanism disposed at a power output end of the first lifting and carrying mechanism for picking and releasing the saggars to carry the saggars of the outer circulation conveying line to the conveying mechanism for stacking.

In one embodiment, the first lifting and carrying mechanism comprises a first lifting support frame set, a second lifting support frame set and a first translation mechanism, the first lifting support frame set and the second lifting support frame set are arranged on two sides of the outer circulation conveying line in parallel, and the first translation mechanism is respectively arranged at a power output end of the first lifting support frame set and a power output end of the second lifting support frame set, so that the first lifting support frame set and the second lifting support frame set jointly drive the first translation mechanism to move up and down; the grabbing and releasing mechanism is arranged at the power output end of the first translation mechanism.

In one embodiment, the bowl unloading and separating device comprises a second lifting and carrying mechanism and a rotary clamping mechanism, the second lifting and carrying mechanism is respectively arranged adjacent to the outer circulation conveying line and the kiln main body, the rotary clamping mechanism is arranged at a power output end of the second lifting and carrying mechanism, and the rotary clamping mechanism is used for clamping and rotating the saggars so as to respectively unload and carry the saggars of the stack assemblies on the conveying mechanism onto the outer circulation conveying line.

In one embodiment, the outer circulation conveying line is further provided with a vibration leveling dividing area, and the loading area and the vibration leveling dividing area are sequentially arranged along the conveying direction of the outer circulation conveying line;

the sintering system of the positive electrode material kiln further comprises a vibration and leveling cutting device which is arranged above the vibration and leveling dividing area and is used for vibrating and leveling the materials in the sagger and dividing the materials into blocks;

a kiln sintering method for a positive electrode material of a lithium ion battery is adopted for sintering by the kiln sintering system for the positive electrode material of the lithium ion battery in any embodiment, and comprises the following steps:

loading the material to be sintered into a loading groove of a sagger on the external circulation conveying line in a loading area through the sagger loading device;

conveying the loaded sagger to a position corresponding to the vibrating and flat cutting device through the external circulation conveying line;

conveying the saggars of the external circulation conveying line to the conveying mechanism through the lifting combination device to be stacked to form combined stacked saggars;

conveying the bowl stacking assembly from the conveying inlet into the kiln main body for sintering through the conveying mechanism, and conveying the sintered bowl stacking assembly from the kiln main body to the conveying outlet;

discharging saggars of the saggar stacking assembly on the conveying mechanism through the saggar discharging and separating device and conveying the saggars to the external circulation conveying line;

the saggars discharged after separation are returned to the loading area through the external circulation conveying line.

Compared with the prior art, the invention has at least the following advantages:

1. when the sintering system of the lithium ion battery anode material kiln operates, firstly, the sagger moves to the loading area along with the external circulation conveying line, and the loading device loads materials to be sintered into the loading groove in the loading area; then the lifting combined device conveys the saggars of the external circulation conveying line to a conveying mechanism to be stacked to form a saggar stacking assembly; then the conveying mechanism conveys the bowl stacking assembly into the kiln main body from the material conveying inlet for sintering, and conveys the sintered bowl stacking assembly into the material conveying outlet from the kiln main body; finally, the saggars of the saggar stacking assembly on the conveying mechanism are respectively unloaded by the saggar unloading and separating device and conveyed to an external circulation conveying line;

2. because two ends of the conveying mechanism respectively extend to the conveying inlet and the conveying outlet, the external circulation conveying line is arranged at the top of the kiln body, a loading area is formed in the external circulation conveying line, the external circulation conveying line is enabled to respectively convey saggars to positions corresponding to the saggar loading device and the lifting combination device, the lifting combination device is used for conveying the saggars of the external circulation conveying line to the conveying mechanism to be stacked to form a saggar stacking assembly, the saggars of the saggar stacking assembly on the conveying mechanism are respectively unloaded and conveyed to the external circulation conveying line by the saggar unloading separation device, the sintering process of the kiln for the anode material is achieved, the saggars are circularly circulated in a three-dimensional space, the quantity of the saggars is reduced, the use cost of the saggars is further reduced, and the saggar treatment amount of each section in the circulation process is smaller;

3. according to the positive electrode material kiln sintering system of the lithium ion battery, the saggars circularly run in the external circulation conveying line, the lifting combination device, the conveying mechanism and the saggar unloading separation device, so that the saggars circularly flow in a three-dimensional space, and the occupied area of the kiln sintering system is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic diagram of a kiln sintering system for a positive electrode material of a lithium ion battery according to an embodiment;

FIG. 2 is a cross-sectional view of the positive electrode material kiln sintering system shown in FIG. 1;

FIG. 3 is a partial schematic view from another perspective of the kiln sintering system for positive electrode material shown in FIG. 1;

FIG. 4 is a partial schematic view of yet another perspective of the positive electrode material kiln sintering system shown in FIG. 1;

FIG. 5 is a partial schematic view of yet another perspective of the positive electrode material kiln sintering system shown in FIG. 2;

FIG. 6 is a schematic view of a sagger of the positive electrode material kiln sintering system shown in FIG. 5;

FIG. 7 is a partial schematic view of the anode material kiln sintering system of FIG. 2;

FIG. 8 is a schematic view of a dicing apparatus of a vibratory flat dicing apparatus of the positive electrode material kiln sintering system shown in FIG. 7;

FIG. 9 is yet another partial schematic view of the positive electrode material kiln sintering system of FIG. 2;

FIG. 10 is a schematic view of the lift assembly of the positive electrode material kiln sintering system of FIG. 9;

fig. 11 is a partial schematic view of a bowl discharge separating device of the sintering system of the cathode material kiln shown in fig. 9.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, a kiln sintering system 10 for positive electrode material of a lithium ion battery according to an embodiment includes a kiln main body 100, a sagger 200, an external circulation conveyor line 300, a bowl loading device 400, a vibration and flat cutting device 500, a lifting and lowering assembly device 600, and a bowl unloading and separating device 700. Wherein, the kiln main body 100 is formed with a feeding inlet 102 and a feeding outlet 104, the kiln main body 100 is provided with a conveying mechanism 110, and two ends of the conveying mechanism 110 respectively extend to the feeding inlet 102 and the feeding outlet 104.

Further, the sagger 200 is formed with a loading chute 202, and the loading chute 202 is used for loading the material to be sintered. The outer circulation conveyor line 300 is provided at the top of the kiln body 100, and the outer circulation conveyor line 300 is used to convey the movement of the saggars 200. The sagger 200 circularly flows in the external circulation conveying line 300, the lifting combination device 600, the conveying mechanism 110 and the sagger unloading and separating device 700 in sequence.

Further, a loading area and a vibration leveling dividing area are sequentially arranged on the outer circulation conveying line 300 along the conveying direction; the bowl loading device 400 is arranged above the loading area, and the bowl loading device 400 is used for loading the material to be sintered into the loading groove 202 in the loading area; the vibration and leveling and slicing device 500 is arranged above the vibration and leveling partition area, the vibration and leveling and slicing device 500 is used for vibrating and leveling the materials in the sagger 200 and dividing the materials into blocks, namely the vibration and leveling and slicing device 500 performs vibration and leveling operation on the materials in the sagger 200 and divides the materials vibrated and leveled in the sagger 200 to form a plurality of parallel material blocks, the vibration and leveling and slicing device 500 performs vibration and leveling operation on the materials in the sagger 200 to uniformly and flatly spread the materials in the sagger 200, and compared with the traditional mode that one sagger 200 is correspondingly sintered to form one positive material block, the number of the sagger 200 is greatly reduced, meanwhile, the space for loading invalid materials is greatly reduced, and the bearing capacity of the kiln main body 100 is reduced; the energy consumption of the kiln body 100 is reduced under the sintering requirement of the same anode material block.

Further, a lifting assembly device 600 is disposed adjacent to the outer circulation line 300, and the lifting assembly device 600 is used for transporting the sagger 200 of the outer circulation line 300 to the conveying mechanism 110 for stacking, so as to form a stack assembly. The conveying mechanism 110 is used for conveying the bowl stacking assembly from the material conveying inlet 102 into the kiln main body 100 for sintering, conveying the sintered bowl stacking assembly from the kiln main body 100 to the material conveying outlet 104, sintering and forming the block-shaped materials in the saggars 200, conveying the saggars 200 in the form of bowl stacking assemblies through the conveying mechanism 110, sintering at least more than two saggars 200 simultaneously by the kiln main body 100, and improving the energy utilization rate of the kiln main body 100. The bowl unloading and separating device 700 is arranged adjacent to the external circulation conveying line 300, the bowl unloading and separating device 700 is used for respectively unloading the saggars 200 of the bowl stacking assemblies on the conveying mechanism 110 and conveying the saggars to the external circulation conveying line 300, namely, the bowl unloading and separating device 700 unloads the sintered material blocks in the saggars 200 of the bowl stacking assemblies on the conveying mechanism 110 and conveys the unloaded empty saggars 200 to the external circulation conveying line 300, so that the empty saggars 200 are circularly circulated to the loading area by the external circulation conveying line 300 for cyclic utilization, the middle part does not need to be additionally provided with a storage station of the empty saggars 200, and meanwhile, a continuous sintering process is realized.

In operation of the lithium ion battery anode material kiln sintering system 10, firstly, the sagger 200 moves to the loading area along with the external circulation conveyor line 300, and the loading device 400 loads the material to be sintered into the loading groove 202 in the loading area; then the sagger 200 moves to a vibration and leveling partition area along with the external circulation conveying line 300, and the vibration and leveling and partitioning device 500 vibrates and levels the materials in the sagger 200 and partitions the materials into blocks; then the lifting combined device 600 conveys the sagger 200 of the external circulation conveying line 300 to the conveying mechanism 110 for stacking to form a sagger stacking assembly; then the conveying mechanism 110 conveys the bowl stacking assembly from the conveying inlet 102 into the kiln main body 100 for sintering, and conveys the sintered bowl stacking assembly from the kiln main body 100 to the conveying outlet 104; finally, the sagger unloading and separating device 700 unloads the saggars 200 of the saggars stacked on the conveying mechanism 110 and conveys the saggars to the external circulation conveying line 300; because two ends of the conveying mechanism 110 respectively extend to the conveying inlet 102 and the conveying outlet 104, the external circulation conveying line 300 is arranged at the top of the kiln main body 100, and the external circulation conveying line 300 is sequentially provided with a loading area and an oscillation dividing area along the conveying direction, so that the external circulation conveying line 300 respectively conveys the saggars 200 to positions corresponding to the oscillation dividing and cutting device 500 and the lifting and combining device 600, the lifting and combining device 600 conveys the saggars 200 of the external circulation conveying line 300 to the conveying mechanism 110 to be stacked to form a stacked saggar assembly, and the saggars 200 of the stacked saggars assembly on the conveying mechanism 110 are respectively unloaded and conveyed to the external circulation conveying line 300 by the saggars separating device 700, so that the sintering process of the anode material kiln is realized, and the saggars 200 are simultaneously circulated in a three-dimensional space, namely the saggars 200 are circulated in the three-dimensional space, the number of the saggars 200 is reduced, the use cost of the saggars 200 is further reduced, and the handling capacity of each saggars 200 in the circulation process is reduced; according to the sintering system 10 of the kiln for the anode material of the lithium ion battery, as the sagger 200 circularly runs on the external circulation conveying line 300, the lifting combination device 600, the conveying mechanism 110 and the sagger unloading separation device 700, the sagger 200 circularly flows in a three-dimensional space, and the floor area of the sintering system 10 of the kiln is reduced.

It is understood that in other embodiments, the flattening and dicing apparatus 500 may be omitted. The bowl-loading device 400 can uniformly load the material to be sintered into the loading chute 202 at the loading area, at least without any further vibration leveling operation.

As shown in fig. 1, it can be understood that the number of saggers 200 of the stack assembly is plural, i.e. the number of saggers 200 of the stack assembly can be two or three or four, etc. In the present embodiment, the number of bowl stacks is three. A plurality of sagger 200 are stacked to form a stack assembly.

As shown in fig. 2 to 4, in one embodiment, a material feeding inlet 102 and a material feeding outlet 104 are respectively formed at two ends of the kiln main body 100, two ends of the conveying mechanism 110 respectively extend to the material feeding inlet 102 and the material feeding outlet 104, one end of the conveying mechanism 110 respectively extends to the material feeding inlet 102, so that the lifting assembly device 600 directly stacks the saggars 200 on the conveying mechanism 110 at the material feeding inlet 102 to form a stacked saggar assembly, and the other end of the conveying mechanism 110 respectively extends to the material feeding outlet 104, so that the saggar discharging and separating device 700 directly discharges the saggars 200 of the stacked saggar assembly on the conveying mechanism 110 one by one at the material feeding outlet 104 and conveys the saggars to the external circulation conveying line 300.

As shown in fig. 1 and 4, in one embodiment, the conveying mechanism 110 includes a plurality of kiln roller rods 112 arranged at intervals, so that the plurality of kiln roller rods 112 are arranged side by side at intervals, so as to convey a plurality of bowl stacking assemblies at intervals, which is beneficial for sintering a plurality of bowl stacking assemblies in batch in sequence, and the cooperation of the external circulation conveying line 300, the lifting and lowering assembly 600 and the bowl unloading and separating device 700 enables the anode material kiln sintering system 10 to achieve the requirement of circulating batch sintering.

As shown in fig. 1 and 4, the conveying mechanism 110 further includes a driving source 114, a driving gear 116 and a plurality of driven gears 118, the driving source 114 is disposed on the kiln body 100, the driving gear 116 is disposed on a power output shaft of the driving source 114, the plurality of driven gears 118 are respectively sleeved on the corresponding kiln roller rods 112, the plurality of driven gears 118 are sequentially in meshing transmission, and the driving gear 116 is in meshing transmission with one of the driven gears 118, so that the conveying mechanism 110 can drive the plurality of kiln roller rods 112 to synchronously rotate relative to the kiln body 100, and further, the plurality of kiln roller rods 112 can simultaneously rotate. It is understood that in the present embodiment, the driving source 114, the driving gear 116 and the plurality of driven gears 118 are all located on the periphery of the kiln body 100. The driving source 114 may be a driving motor or a driving cylinder, etc.

As shown in fig. 1 and 5, in one embodiment, the outer peripheral wall of each kiln roller 112 is convexly provided with a limiting ring protrusion 112a, the bottom of the sagger 200 is formed with a limiting groove 204, and the limiting ring protrusion 112a is located in the limiting groove 204 and is in rolling connection with the sagger 200, so that the limiting groove 204 of the sagger 200 of the stacking assembly is limited and conveyed by the limiting ring protrusion 112a, thereby limiting the running track of the stacking assembly in the kiln main body 100, and preventing the problem that the kiln is blocked and the roller collapses caused by the skew running. In this embodiment, the retainer ring protrusion 112a is formed to surround the kiln roller 112 by one turn along the outer circumferential wall thereof, so that the kiln roller 112 can retain the sagger 200 of the bowl stack assembly when rotating relative to the kiln body 100. In one embodiment, the height of the retainer ring protrusion 112a is slightly smaller than the depth of the retainer groove 204 of the sagger 200, and the width of the retainer ring protrusion 112a is slightly smaller than the width of the retainer groove 204, so that the retainer groove 204 is engaged with the retainer ring protrusion 112a when the sagger 200 runs on the kiln roller 112, and the sagger 200 is prevented from being inclined transversely or longitudinally during running.

Further, the kiln body 100 is provided with a heat insulation layer, so that the kiln body has the functions of heat insulation. As shown in fig. 4, an upper heating rod 103 and a lower heating rod 105 are further disposed on the inner wall of the kiln body 100, the upper heating rod 103 and the lower heating rod 105 are respectively located at two sides of the conveying mechanism 110, and the upper heating rod 103 and the lower heating rod 105 heat and sinter the stack assembly at the same time, so as to radiate heat uniformly into the materials of the upper and lower saggars 200. In this embodiment, the number of the upper heating rods 103 and the number of the lower heating rods 105 are both plural, the plural upper heating rods 103 are arranged side by side, and the plural lower heating rods 105 are arranged side by side.

In one embodiment, the kiln body 100 is further provided with an air inlet system and an air exhaust system, the air inlet system comprises a driving fan and an air inlet pipeline, the air inlets are arranged at the bottom and the side of the kiln body, and the side air inlets are parallel to the saggars 200, so that the sufficiency and consistency of sintering can be better ensured; the exhaust system comprises an exhaust fan and an exhaust pipeline, the exhaust pipeline is arranged in the heating section and the cooling section of the kiln body main body, and exhaust gas and waste heat generated in the reaction sintering process of the anode material are exhausted.

Furthermore, partition partitions are arranged in the kiln body main body, so that the temperature and atmosphere in different temperature areas are relatively uniform, and the consistency of material sintering is ensured. In this embodiment, a plurality of partition zones are provided in the kiln body main body to divide the interior of the kiln body main body into a temperature raising section, a heat preservation section and a cooling section along the conveying mechanism 110 in sequence. Furthermore, the temperature rise rate of the temperature rise section is 1-2 ℃/min, the temperature rises to 800-850 ℃, and then the temperature rises to 900-950 ℃ so as to better sinter the materials. In this embodiment, the temperature is raised to 800 ℃ to 850 ℃ for the first time, and is raised to 900 ℃ to 950 ℃ for the second time. Furthermore, the heat preservation time is 11-13h; furthermore, the temperature rise time is 8-16 h, so that the materials can be sintered better.

Further, a surplus material collecting box (not shown) is arranged below the conveying end of the outer circulation conveying line 300 and used for collecting surplus materials falling on the outer circulation conveying line 300 outside the sagger 200, so that the kiln sintering system 10 is tidy.

It can be understood that, in the process of conveying the stacked bowl assembly by the conveying mechanism 110, the stack bowl staying time, the sintering staying time and the discharging staying time need to be considered at the same time, in order to enable the lifting combination device 600 to convey the sagger 200 of the external circulation conveying line 300 onto the conveying mechanism 110 to be stacked to form the stacked bowl assembly, and enable the material to be sintered in the sagger 200 of the stacked bowl assembly to be reliably sintered, and enable the sintered cake in the sagger 200 of the stacked bowl assembly to be reliably discharged and transferred to the external circulation conveying line 300, further, the sintering staying time is greater than or equal to the stack bowl staying time, and the sintering staying time is greater than or equal to the discharging staying time, the lifting combination device 600 is enabled to convey the sagger 200 of the external circulation conveying line 300 onto the stacking conveying mechanism 110 to be stacked to form the stacked bowl assembly, and enable the material to be sintered in the sagger 200 of the stacked bowl assembly to be reliably sintered, and the sintered cake in the sagger 200 of the stacked bowl assembly after being sintered is reliably discharged and transferred to the external circulation conveying line 300.

As shown in fig. 3, in one embodiment, a mounting frame (not shown) is disposed on the top of the kiln main body 100, the outer circulation conveying line 300 includes a driving motor (not shown), a conveying belt 320, a first roller 330 and a second roller 340, the driving motor is disposed on the mounting frame, the first roller and the second roller are both rotatably connected to the mounting frame, the conveying belt is respectively sleeved on the first roller and the second roller, a power output shaft of the driving motor is connected to one end of the first roller, and the conveying belt is used for conveying the sagger 200 to move, so that the sagger 200 moves to a loading area and a vibration leveling partition area, respectively.

It will be appreciated that there are instances where there is an unequal time required for residence at the loading and leveling zones, etc. Further, the number of the outer circulation line 300 is plural, and a plurality of the outer circulation lines 300 are adjacently disposed side by side. In this embodiment, the figure of extrinsic cycle transfer chain 300 is four, be first extrinsic cycle transfer chain respectively, the second extrinsic cycle transfer chain, third extrinsic cycle transfer chain and fourth extrinsic cycle transfer chain, first extrinsic cycle transfer chain, the second extrinsic cycle transfer chain, the top of kiln main part 100 is all located to third extrinsic cycle transfer chain and fourth extrinsic cycle transfer chain, the adjacent lift composite set 600 setting of first extrinsic cycle transfer chain, the adjacent flat cutting device 500 setting that shakes of second extrinsic cycle transfer chain, the adjacent dress alms bowl device 400 setting of third extrinsic cycle transfer chain, the adjacent alms bowl separator 700 setting that unloads of fourth extrinsic cycle transfer chain. The loading area is arranged on the third external circulation conveying line, the vibration-leveling dividing area is arranged on the second external circulation conveying line, the lifting combination device 600 is used for conveying the saggars 200 of the first external circulation conveying line to the conveying mechanism 110 to be stacked, and the saggars unloading separation device 700 is used for respectively unloading the saggars 200 of the saggar stacking assembly on the conveying mechanism 110 and conveying the saggars to the fourth external circulation conveying line.

As shown in fig. 3, further, the kiln sintering system 10 for positive electrode materials of lithium ion batteries further includes a plurality of sensors 800, the plurality of sensors 800 are disposed in one-to-one correspondence with the plurality of external circulation conveying lines 300, each sensor is electrically connected to a control terminal of a driving motor of the corresponding external circulation conveying line 300, and when the sensor corresponding to each external circulation conveying line 300 senses the sagger 200, the external circulation conveying line 300 stops operating for a period of time, so as to reliably perform operations of charging materials, vibrating, dividing, moving away from the sagger 200, placing the empty sagger 200, and the like. Specifically, when the first external circulation conveying line stops, the lifting combination device 600 is used for conveying the sagger 200 of the first external circulation conveying line to the conveying mechanism 110 for stacking, that is, the lifting combination device 600 is used for conveying the sagger 200 of the first external circulation conveying line away; when the second external circulation conveying line stops, the vibration and leveling and slicing device 500 is used for vibrating and leveling and slicing the materials in the sagger 200 of the second external circulation conveying line, namely the vibration and leveling and slicing device 500 is used for vibrating and leveling the materials in the sagger 200 and slicing the vibrated and leveled materials in the sagger 200; when the third external circulation conveying line is stopped, the bowl loading device 400 loads the material to be sintered into the loading groove 202 at the loading area; when the fourth external circulation conveying line stops, the bowl unloading and separating device 700 unloads the sintered material blocks in the saggars 200 of the bowl stacking assembly on the conveying mechanism 110, and conveys the unloaded empty saggars 200 to the fourth external circulation conveying line. The sensor may be a photoelectric or other sensor.

Furthermore, the sintering system 10 of the positive electrode material kiln further includes a plurality of clamping and positioning devices, the plurality of clamping and positioning devices are disposed in one-to-one correspondence with the plurality of inductors, and the plurality of clamping and positioning devices are disposed in one-to-one correspondence with the plurality of outer circulation conveying lines 300. When the sensor senses the sagger 200 of the outer circulation conveying line 300, the outer circulation conveying line 300 stops, and the corresponding clamping and positioning device clamps and positions the sagger 200 so as to perform operations of material filling, vibration and flat separation, sagger 200 carrying, empty sagger 200 placing and the like. In this embodiment, each clamping and positioning device includes two oppositely disposed clamping assemblies, and the two clamping assemblies are respectively located at two sides of the outer circulation conveyor line 300 of the conveying mechanism 110. In this embodiment, the centre gripping subassembly includes centre gripping cylinder and grip block, and the grip block is connected on the power shaft of centre gripping cylinder.

As shown in fig. 2, the vibration leveling and dicing apparatus 500 includes a vibration leveling apparatus 510 and a dicing apparatus 520, the vibration leveling apparatus 510 and the dicing apparatus 520 are sequentially disposed along the conveying direction of the outer circulation conveying line 300, the vibration leveling dividing region on the outer circulation conveying line 300 includes a vibration leveling region and a dividing region, the vibration leveling region is disposed corresponding to the vibration leveling apparatus 510, and the dividing region is disposed corresponding to the dicing apparatus 520. In the present embodiment, the vibrating device 510 is used for vibrating and leveling the material in the sagger 200, and the slicing device 520 is used for dividing the material vibrated and leveled in the sagger 200 into a plurality of side-by-side material blocks. In this embodiment, the vibration-leveling area and the dividing area are respectively provided with a clamping and positioning device for clamping and positioning the sagger 200, so as to perform vibration-leveling or dividing operation.

As shown in fig. 1 and 7, further, the leveling device 510 includes a vibration mechanism 512 and a jacking mechanism 514, the vibration mechanism 512 is disposed above the external circulation conveying line 300, the jacking mechanism 514 includes a jacking cylinder 5142 and a jacking assembly 5144, the jacking assembly is mounted at the top of the kiln main body 100, the jacking assembly is mounted at a power output end of the jacking cylinder, and the jacking assembly is used for supporting and jacking up the sagger 200, so that the sagger 200 abuts against the vibration motor, thereby performing the leveling operation on the sagger 200. In this embodiment, the jacking subassembly includes the jacking seat, and the jacking seat is connected on the power shaft of jacking cylinder, and two centre gripping subassemblies are installed in the jacking seat relatively, and two centre gripping subassemblies are used for pressing from both sides tightly in sagger 200's both sides jointly to make the jacking subassembly support and jack-up sagger 200. Further, the vibrating mechanism 512 includes a fixing base 5122, a vibrating motor 5124 and a vibrating cover plate 5126, the fixing base is mounted on the kiln body 100 through a fixing frame, the vibrating motor is mounted on the fixing base, the vibrating motor is disposed on the vibrating cover plate, the vibrating cover plate is located above the vibrating area, and the vibrating cover plate is configured to abut against the sagger 200 when the jacking component supports and jacks up the sagger 200 to a predetermined height, so as to perform a vibrating operation on the sagger 200. Furthermore, the abutting surface of the vibration cover plate 5126 is provided with a sealing convex ring 5127, which elastically abuts against the opening of the loading slot 202 of the sagger 200 and plays a role of sealing during vibration to prevent dust leakage during vibration leveling.

As shown in fig. 2, 7 and 8, the dicing apparatus 520 further includes a dicing drive cylinder 522 and a cutter holder 524, the dicing drive cylinder 522 is disposed above the kiln body 100, the cutter holder 524 is mounted on a power shaft of the dicing drive cylinder 522, and the dicing drive cylinder 522 drives the cutter holder 524 to move up and down to divide the material vibrated in the sagger 200. In this embodiment, the cutter seat 524 includes a cutter fixing plate 5242 and a plurality of cutters 5244, the cutter fixing plate 5242 is mounted on the power shaft of the cutter driving cylinder 522, the plurality of cutters 5244 are spaced apart from each other on the cutter fixing plate 5242, and the cutter driving cylinder 522 drives the cutter seat 524 to move up and down to divide the material vibrated to the horizontal in the sagger 200.

As shown in fig. 9 and 10, in one embodiment, the lifting assembly 600 includes a first lifting and carrying mechanism 610 and a pick and place mechanism 620, the first lifting and carrying mechanism 610 is disposed adjacent to the outer circulation conveyor line 300 and the kiln body 100, respectively, the pick and place mechanism is disposed at a power output end of the first lifting and carrying mechanism 610, and the pick and place mechanism 620 is configured to pick and release the sagger 200 of the outer circulation conveyor line 300 to the conveying mechanism 110 for stacking.

As shown in fig. 9 and 10, in one embodiment, the first lifting and carrying mechanism 610 includes a first lifting and supporting frame set 612, a second lifting and supporting frame set 614, and a first translation mechanism 616, the first lifting and supporting frame set 612 and the second lifting and supporting frame set 614 are disposed at two sides of the outer circulation conveying line 300 in parallel, the first translation mechanism 616 is respectively installed at a power output end of the first lifting and supporting frame set 612 and a power output end of the second lifting and supporting frame set 614, so that the first lifting and supporting frame set 612 and the second lifting and supporting frame set 614 jointly drive the first translation mechanism 616 to move up and down. The grabbing and releasing mechanism 620 is installed at a power output end of the first translation mechanism 616, so that the first translation mechanism 616 drives the grabbing and releasing mechanism 620 to translate, and the first lifting support frame group 612 and the second lifting support frame group 614 together drive the first translation mechanism 616 to move up and down, so that the grabbing and releasing mechanism 620 can better convey the sagger 200 of the outer circulation conveyor line 300 to the conveying mechanism 110 for stacking.

As shown in fig. 9 and 10, further, the first lifting support group 612 includes two first support frames 6122, two first lifting motors 6124 and two first sliding frames 6126, the two first support frames 6122 and the two first lifting motors 6124 are arranged in parallel, the two first lifting motors 6124 and the two first support frames 6122 are arranged in a one-to-one correspondence manner, the first sliding frames 6126 are respectively connected to the two first support frames 6122 in a sliding manner, and the two first lifting motors 6124 simultaneously drive the first sliding frames 6126 to respectively lift and slide relative to the two first support frames 6122; furthermore, the second lifting support frame group 614 includes two second support frames 6142, two second lifting motors 6144 and two second sliding frames 6146, the number of the second support frames 6142 and the number of the second lifting motors 6144 are two, the two second support frames 6142 are arranged in parallel, the two second lifting motors 6144 and the two second support frames 6142 are arranged in a one-to-one correspondence manner, the second sliding frames 6146 are respectively connected to the two second support frames 6142 in a sliding manner, and the two second lifting motors 6144 simultaneously drive the second sliding frames 6146 to respectively lift and slide relative to the two second support frames 6142; the first translation mechanism 616 is respectively mounted on the first carriage 6126 and the second carriage 6146.

As shown in fig. 9 and fig. 10, the first translating mechanism 616 includes a first translating driving motor 6162, a second translating driving motor 6164 and a translating plate 6166, the first translating driving motor 6162 is disposed on the first sliding frame 6126, the second translating driving motor 6164 is disposed on the second sliding frame 6146, and the translating plate 6166 is respectively mounted on the power output base of the first translating driving motor 6162 and the power output base of the second translating driving motor 6164. The pick-and-place mechanism 620 is mounted on the translation plate 6166, such that the first translation mechanism 616 drives the pick-and-place mechanism 620 to translate. In this embodiment, the number of the grabbing and releasing mechanisms 620 is multiple, and the grabbing and releasing mechanisms 620 are arranged at intervals along the length direction of the translation plate 6166, so that the grabbing and releasing mechanisms 620 grab or release the sagger 200 together, and further the sagger 200 moves more stably along with the grabbing and releasing mechanisms 620.

As shown in fig. 10, each of the pick-and-place mechanisms 620 further includes a clamping cylinder 622 and two clamping jaws 624, the two clamping jaws 624 are respectively disposed on two power output ends of the clamping cylinder 622, and the clamping cylinder 622 drives the two clamping jaws 624 to move toward or away from each other at the same time, so as to perform a pick-and-place operation on the sagger 200. Furthermore, each jaw 624 includes a jaw seat 6242 and a bent jaw portion 6244, the jaw seat 6242 is fixedly connected to the power output end of the clamping cylinder 622, the bent jaw portion 6244 is connected to the end portion of the jaw seat 6242, the bent jaw portion 6244 is bent, and the two bent jaw portions 6244 are bent toward a direction approaching each other, so that the two jaws 624 of each grasping and releasing mechanism 620 can better grasp or release the sagger 200.

As shown in fig. 10 and 6, each of the bent claw portions 6244 is L-shaped, so that each bent claw portion 6244 can be better moved from the side wall of the sagger 200, and the bent claw portions 6244 of the two bent claw portions 6244 can better grip the sagger 200. Furthermore, two clamping fixing grooves 206 are formed at the bottom of the sagger 200, so that the bent claw portions 6244 of the two bent claw portions 6244 can be respectively grabbed by the corresponding clamping fixing grooves when the sagger 200 is grabbed, and meanwhile, the bent claw portions 6244 of the two bent claw portions 6244 can better grab the sagger 200. Further, the two grip fixing grooves communicate with each other, so that each grip fixing groove can be processed while reducing the weight of the sagger 200. In this embodiment, the two clamping fixing grooves are communicated with each other to form a plurality of clamping through grooves. When the sagger 200 is grabbed, the grabbing and releasing mechanisms 620 are correspondingly clamped in the clamping through grooves one by one.

As shown in fig. 9 and 11, in one embodiment, the bowl discharging and separating device 700 includes a second lifting and carrying mechanism 710 and a rotary clamping mechanism 720, the second lifting and carrying mechanism 710 is disposed adjacent to the outer circulation conveyor line 300 and the kiln main body 100, the rotary clamping mechanism 720 is disposed at a power output end of the second lifting and carrying mechanism 710, and the rotary clamping mechanism 720 is configured to clamp and rotate the saggars 200, so as to discharge and carry the saggars 200 of the stacked bowl assemblies on the conveying mechanism 110 onto the outer circulation conveyor line 300. In this embodiment, when discharging the sagger 200 of the stacked sagger assembly on the conveying mechanism 110, the rotary clamping mechanism 720 clamps the sagger 200, the second lifting and carrying mechanism 710 drives the rotary clamping mechanism 720 to move to the upper part of the discharging area, and the rotary clamping mechanism 720 clamps and rotates the sagger 200 to 180 degrees clockwise, so that the sinter in the sagger 200 is discharged into the discharging area; when the sagger 200 of the stack assembly on the conveying mechanism 110 is conveyed to the outer circulation conveyor line 300, the rotating clamping mechanism 720 clamps and rotates the sagger 200 counterclockwise by 180 degrees, and the second lifting and conveying mechanism 710 drives the rotating clamping mechanism 720 to move to the outer circulation conveyor line 300.

As shown in fig. 9 and 11, the second lifting/carrying mechanism 710 further includes two third lifting/supporting frame groups 712 and a second translating mechanism 714, the two third lifting/supporting frame groups 712 are disposed in parallel at two sides of the outer circulation conveying line 300, and the second translating mechanism 714 is respectively mounted at the power output ends of the two third lifting/supporting frame groups 712, so that the two third lifting/supporting frame groups 712 jointly drive the corresponding mounting plate 7265 to move up and down. The number of the rotary clamping mechanisms 720 is two, and the two rotary clamping mechanisms 720 are respectively installed and fixed at the power output end of the second translation mechanism 714, so that the second translation mechanism 714 simultaneously drives the two rotary clamping mechanisms 720 to move. The two rotary gripping mechanisms 720 collectively grip and rotate the sagger 200.

As shown in fig. 9 and 11, further, the second translating mechanism 714 includes two translating cylinder assemblies, the two translating cylinder assemblies are respectively mounted on the power output ends of the two third lifting support frame groups 712, and the two rotating clamping mechanisms 720 are respectively mounted and fixed on the power output seats of the corresponding translating cylinder assemblies. In this embodiment, each rotary clamping mechanism 720 includes a fixing plate 722, a rotary cylinder 724 and a clamping assembly 726, the fixing plate 722 of each rotary clamping mechanism 720 is mounted on the power output base of the corresponding translation cylinder assembly, the rotary cylinder 724 is mounted on the fixing plate 722, the clamping assembly 726 is mounted on the rotary power shaft of the rotary cylinder 724, and the clamping power directions of the clamping assemblies 726 of the two rotary clamping mechanisms 720 are opposite, so that the two rotary clamping mechanisms 720 jointly clamp the sagger 200 and synchronously rotate. Further, the clamping assembly 726 of each rotary clamping mechanism 720 includes a pushing cylinder 7262, an inserting plate member 7264 and a lifting clamp member 7266, the power output directions of the clamping assemblies 726 of the two rotary clamping mechanisms 720 are opposite, the inserting plate member 7264 is mounted on the power shaft of the pushing cylinder 7262, the lifting clamp member 7266 is mounted on the inserting plate member 7264, and the clamping portions of the lifting clamp member 7266 move toward or away from the inserting plate member 7264, so that the clamping portions act on the top of the sagger 200 in the vertical direction to press the sagger 200 onto the inserting plate member 7264, and the clamping assemblies 726 of the two rotary clamping mechanisms 720 better clamp the sagger 200 and perform the rotary operation.

As shown in fig. 9 and 11, the insertion plate 7264 includes a mounting plate 7265 and a supporting extension plate 7267 connected to each other, the mounting plate 7265 is mounted on a power shaft of the pushing cylinder 7262, the lifting clamp 7266 is mounted on the mounting plate 7265, the supporting extension plate 7267 is connected to an end of the mounting plate 7265 away from the clamping portion, when the rotating clamping mechanism 720 clamps the sagger 200, the pushing cylinder 7262 drives the mounting plate 7265 to move, so that the mounting plate 7265 drives the supporting extension plate 7267 to be inserted into the bottom of the sagger 200, and the clamping portion of the lifting clamp 7266 acts on the top of the sagger 200 to clamp the sagger 200 onto the insertion plate 7264. In this embodiment, the mounting plate 7265 and the support extension plate 7267 are integrally formed, so that the insert plate 7264 has a simpler structure, and the mounting plate 7265 and the support extension plate 7267 are firmly connected. Referring to fig. 6, further, the bottom of the sagger 200 is respectively provided with a slot 208, and the supporting extension plate 7267 is inserted into the slot, so that the supporting extension plate 7267 is better inserted into the bottom of the sagger 200. Further, the lift clamp 7266 includes a lift clamp cylinder 7267 and a clamp portion 7269, the lift clamp cylinder 622 mounted to the mounting plate 7265, the clamp portion fixedly coupled to the power shaft of the lift clamp cylinder 622 to move the clamp portion toward or away from the plate member 7264. Specifically, the pressing part is of a pressing column structure.

As shown in fig. 5 and 9, a photoelectric correlation sensor assembly 1042 is disposed at the material delivery outlet 104, and is in communication connection with a control end of the bowl unloading and separating device 700, when the bowl stacking assembly is transported to a position corresponding to the photoelectric correlation sensor assembly along with the transporting mechanism 110, the photoelectric correlation sensor assembly generates a sensing signal, the bowl unloading and separating device 700 starts to operate, so as to unload the sintered material blocks in the sagger 200 of the bowl stacking assembly on the transporting mechanism 110, and transport the unloaded empty sagger 200 to the outer circulation transporting line 300, thereby realizing fast and accurate unloading and circulation of the sagger 200. In the present embodiment, the optical electrical correlation sensor assembly includes at least one set of optical electrical correlation sensors. It can be understood that the number of the sets of the photoelectric correlation sensors can be one set or more than two sets, and the specific number can be selected according to the number of the saggars 200 of the stacked saggars assembly or the number of the layers, so that the saggars 200 of the stacked saggars assembly can be unloaded one by the saggars unloading and separating device 700 and conveyed to the external circulation conveying line 300.

The application also provides a kiln sintering method of the anode material of the lithium ion battery, the kiln sintering system 10 of the anode material of the lithium ion battery in any embodiment is adopted for sintering, and the kiln sintering method of the anode material comprises part or all of the following steps:

s101, loading materials to be sintered into a loading groove 202 of the sagger 200 on the external circulation conveying line 300 in a loading area through the loading device 400;

s103, conveying the loaded sagger 200 to a position corresponding to the vibration and flattening cutting device 500 through the external circulation conveying line 300;

s105, vibrating and cutting the materials in the sagger 200 into blocks through the vibrating and cutting device 500;

s107, the sagger 200 of the external circulation conveying line 300 is conveyed to the conveying mechanism 110 through the lifting combination device 600 to be stacked to form a combined stacked sagger;

s109, conveying the bowl stacking assembly from the material conveying inlet 102 into the kiln main body 100 through the conveying mechanism 110 for sintering, and conveying the sintered bowl stacking assembly from the kiln main body 100 to the material conveying outlet 104;

s111, respectively discharging the saggars 200 of the saggar stacking assembly on the conveying mechanism 110 through the saggar discharging and separating device 700 and conveying the saggars to the external circulation conveying line 300;

and S113, the sagger 200 after separation and discharge is returned to the loading area through the flow of the external circulation conveying line 300.

In the sintering method of the lithium ion battery anode material kiln, the lithium ion battery anode material kiln sintering system 10 is adopted for sintering, when in operation, firstly, the sagger 200 moves to a loading area along with the external circulation conveying line 300, and the sagger device 400 loads materials to be sintered into the loading groove 202 in the loading area; then the sagger 200 moves to a vibration and leveling partition area along with the external circulation conveying line 300, and the vibration and leveling and partitioning device 500 vibrates and levels the materials in the sagger 200 and partitions the materials into blocks; then the lifting combined device 600 conveys the sagger 200 of the external circulation conveying line 300 to the conveying mechanism 110 for stacking to form a sagger stacking assembly; then the conveying mechanism 110 conveys the bowl-stacking assembly from the material conveying inlet 102 into the kiln main body 100 for sintering, and conveys the sintered bowl-stacking assembly from the kiln main body 100 to the material conveying outlet 104; finally, the sagger unloading and separating device 700 unloads the saggars 200 of the saggars stacked on the conveying mechanism 110 and conveys the saggars to the external circulation conveying line 300; because two ends of the conveying mechanism 110 respectively extend to at least the conveying inlet 102 and the conveying outlet 104, the external circulation conveying line 300 is arranged at the top of the kiln body 100, and the external circulation conveying line 300 is sequentially provided with a loading area and a vibration dividing area along the conveying direction, so that the external circulation conveying line 300 respectively conveys the saggars 200 to positions corresponding to the vibration cutting device 500 and the lifting combination device 600, the lifting combination device 600 conveys the saggars 200 of the external circulation conveying line 300 to the conveying mechanism 110 to be stacked to form a saggar stacking assembly, the saggars 200 of the saggars stacking assembly on the conveying mechanism 110 are respectively unloaded and conveyed to the external circulation conveying line 300 by the saggars separating device 700, thereby realizing the sintering process of the anode material kiln, and simultaneously enabling the saggars 200 to circulate in a three-dimensional space, even if the saggars 200 are conveyed in a closed loop in the three-dimensional space, reducing the number of the saggars 200, further reducing the use cost of the saggars 200, and enabling the processing amount of the saggars 200 in each section of the circulation process to be smaller; according to the sintering system 10 of the kiln for the anode material of the lithium ion battery, as the sagger 200 circularly runs on the external circulation conveying line 300, the lifting combination device 600, the conveying mechanism 110 and the sagger unloading separation device 700, the sagger 200 circularly flows in a three-dimensional space, and the floor area of the sintering system 10 of the kiln is reduced.

In one embodiment, the step of vibrating and dividing the material in the sagger 200 into pieces by the vibrating and slicing apparatus 500 comprises: firstly, vibrating and leveling the materials in the sagger 200 to uniformly and flatly spread the materials in the sagger 200; the material in the sagger 200 after the vibration leveling operation is divided into pieces.

In order to better understand the sintering method of the anode material kiln of the lithium ion battery, the following specific description is made on the sintering method of the anode material kiln of the lithium ion battery:

example 1:

firstly, loading materials into a pot, loading unsintered positive electrode materials into a long-groove type sagger 200 (330mml 2000mmw 100mmh), wherein the loading amount of the pot is 108 percent (same kiln space) of 6 columns of conventional saggers 200 (330mml 330mmw 100mmh), and the thickness of a material layer after the pot loading is consistent with that of the conventional sagger 200;

secondly, vibrating and cutting the materials, namely homogenizing, spreading and dividing the materials in the sagger 200 into blocks to ensure the uniformity and sufficiency of sintering the materials;

secondly, combining the upper-layer sagger 200 and the lower-layer sagger 200 into stacked saggers, and finishing the stacking of the saggers 200 subjected to vibration and leveling and slicing by a lifting device;

secondly, the sagger 200 enters a furnace for sintering, a groove in the bottom of the sagger 200 is embedded with a roller kiln roller rod 112 limiting ring, the temperature of a sintering heat preservation area is 700-1000 ℃ (determined according to sintering processes of different anode materials), and the sintering time is 20-36h (including heating time, heat preservation time and cooling time, determined according to sintering processes of different anode materials); in the embodiment, the heating rate is 1-2 ℃/min, the temperature is increased to 800-850 ℃, then the temperature is increased to 900-950 ℃, and the temperature is kept for 11-13h;

secondly, discharging the sagger 200 out of the furnace, separating the sagger 200 from the upper layer and the lower layer through a sagger discharging separating device 700 after the sagger 200 is discharged out of the furnace, and lifting the separated sagger 200 to a sagger discharging station for discharging;

finally, the empty saggars 200 after unloading are circulated in the external circulation line, and the photoelectric sensors at the first end and the last end of the belt conveying group and the saggars 200 clamp and position devices for starting and stopping belt conveying and positioning the saggars 200.

Example 2:

firstly, loading materials into a pot, loading unsintered anode materials into a long-groove-shaped sagger 200 (660mmL 2000mmW 100mmH), wherein the loading amount is 113% of that of 6 rows of conventional saggers 200 (330mmL 330mmW 100mmH) (X is the loading amount of the 6 rows of conventional saggers 200), and the thickness of a material layer after the saggers are consistent with that of the conventional sagger 200;

secondly, vibrating and cutting the materials into pieces, homogenizing, flatly spreading and dividing the materials in the sagger 200 into pieces, and ensuring the uniformity and the sufficiency of material sintering;

secondly, the sagger 200 is sintered in a furnace, a groove in the bottom of the sagger 200 is embedded with a limiting ring of the roller kiln roller rod 112, the temperature of a sintering heat preservation area is 700-1000 ℃ (according to sintering processes of different anode materials), and the sintering time is 20-36h (including heating time, heat preservation time and cooling time, which are determined according to sintering processes of different anode materials); in the embodiment, the heating rate is 1-2 ℃/min, the temperature is increased to 800-850 ℃, then the temperature is increased to 900-950 ℃, and the temperature is kept for 11-13h;

secondly, discharging the saggars 200 out of the furnace, separating the saggars 200 on the upper layer and the lower layer through a saggar discharging separation device 700 after the saggars 200 are discharged out of the furnace, and lifting the separated saggars 200 to a saggar discharging station for discharging;

secondly, the empty sagger 200 after unloading is circulated in an external circulation line body, and the photoelectric sensors at the first end and the last end of the belt conveying group and the sagger 200 clamp and position the device for starting and stopping belt conveying and positioning the sagger 200.

The following chart is a comparison between before and after examples 1, 2 and comparative examples:

compared with the prior art, the invention has the following advantages:

1. in the sintering system 10 of the lithium ion battery anode material kiln, when in operation, the sagger 200 moves to the loading area along with the external circulation conveying line 300, and the loading device 400 loads the material to be sintered into the loading groove 202 in the loading area; then the sagger 200 moves to a vibration and leveling partition area along with the external circulation conveying line 300, and the vibration and leveling and partitioning device 500 vibrates and levels the materials in the sagger 200 and partitions the materials into blocks; then the sagger 200 of the external circulation conveying line 300 is conveyed to the conveying mechanism 110 by the lifting combined device 600 to be stacked to form a sagger stacking assembly; then the conveying mechanism 110 conveys the bowl stacking assembly from the conveying inlet 102 into the kiln main body 100 for sintering, and conveys the sintered bowl stacking assembly from the kiln main body 100 to the conveying outlet 104; finally, the sagger 200 of the sagger stacking assembly on the conveying mechanism 110 is respectively unloaded by the sagger unloading and separating device 700 and conveyed to the external circulation conveying line 300;

2. because two ends of the conveying mechanism 110 respectively extend to at least the conveying inlet 102 and the conveying outlet 104, the external circulation conveying line 300 is arranged at the top of the kiln body 100, and the external circulation conveying line 300 is sequentially provided with a loading area and a vibration dividing area along the conveying direction, so that the external circulation conveying line 300 respectively conveys the saggars 200 to the positions corresponding to the vibration cutting device 500 and the lifting combination device 600, the lifting combination device 600 conveys the saggars 200 of the external circulation conveying line 300 to the conveying mechanism 110 to be stacked to form a saggar stacking assembly, the saggars 200 of the saggars stacking assembly on the conveying mechanism 110 are respectively unloaded and conveyed to the external circulation conveying line 300 by the saggars separating device 700, and thus the sintering process of the anode material kiln is realized, the saggars 200 are circulated in a three-dimensional space, the number of the saggars 200 is reduced, the use cost of the saggars 200 is reduced, and the processing amount of the saggars 200 in each section of the circulation process is smaller;

3. according to the sintering system 10 of the kiln for the anode material of the lithium ion battery, as the sagger 200 circularly runs on the external circulation conveying line 300, the lifting combination device 600, the conveying mechanism 110 and the sagger unloading separation device 700, the sagger 200 circularly flows in a three-dimensional space, and the floor area of the sintering system 10 of the kiln is reduced.

4. According to the kiln sintering system 10 for the anode material of the lithium ion battery, the utilization rate of the sintering space of the kiln is improved, the productivity is increased compared with that of the conventional multi-row saggars 200, the weight of the saggars 200 is reduced under the condition of the same productivity, the cost of the saggars 200 is reduced, the load bearing capacity of the kiln is reduced, the energy absorption of the saggars 200 is reduced, and the like.

5. According to the sintering system 10 for the lithium ion battery anode material kiln, the saggars 200 are lower in number, the frequency of processing the saggars 200 in the matched working procedures is reduced, and the feasibility of increasing the speed and increasing the yield of the kiln is improved.

6. In the sintering system 10 for the lithium ion battery anode material kiln, the roller rod limiting ring protrusion 112a and the groove at the bottom of the sagger 200 are used, so that the deflection abnormity of the sagger 200 during conveying is reduced.

7. In the lithium ion battery anode material kiln sintering system 10, the external circulation conveying line 300 is arranged above the roller kiln body, so that the occupied area of a sintering area is reduced.

8. In the positive electrode material kiln sintering system 10 of the lithium ion battery, the outer circulation conveying line 300 is a belt conveying group, namely the outer circulation conveying line 300 is static conveying, compared with traditional double-speed chain type dynamic conveying, the friction vibration of the sagger 200 and a conveying line body is reduced, the stress damage abnormity of the sagger 200 in the conveying process is reduced, the recycling frequency of the sagger 200 is increased to a certain extent, and the risk of metal foreign matters caused by friction is reduced.

9. According to the sintering system 10 of the lithium ion battery anode material kiln, the lifting combination device 600 is combined with the sagger unloading separation device 700, the sagger 200 is combined and separated in the lifting process, and the device or the device does not need to be arranged independently, so that the design cost of the whole production line is reduced.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A lithium ion battery anode material kiln sintering system is characterized by comprising:

a sagger formed with a loading slot;

the external circulation conveying line is arranged at the top of the kiln main body and used for conveying saggars to move, and a loading area is arranged on the external circulation conveying line;

the pot loading device is arranged above the charging area and used for loading materials to be sintered into the charging groove in the charging area;

the lifting combination device is arranged adjacent to the outer circulation conveying line and used for conveying the saggars of the outer circulation conveying line onto the conveying mechanism to be stacked to form a saggar stacking assembly; the conveying mechanism is used for conveying the bowl stacking assembly into the kiln main body from the material conveying inlet for sintering, and conveying the sintered bowl stacking assembly into the material conveying outlet from the kiln main body;

and the bowl unloading and separating device is arranged close to the outer circulation conveying line and is used for respectively unloading the saggars of the bowl stacking assembly on the conveying mechanism and conveying the saggars to the outer circulation conveying line.

2. The kiln sintering system for positive electrode material of lithium ion battery as claimed in claim 1, wherein the feeding inlet and the feeding outlet are formed at two ends of the kiln body, respectively, and two ends of the conveying mechanism extend to the feeding inlet and the feeding outlet, respectively.

3. The lithium ion battery positive electrode material kiln sintering system of claim 1, wherein the conveying mechanism comprises a plurality of kiln roller rods arranged at intervals.

4. The kiln sintering system for the positive electrode material of the lithium ion battery as claimed in claim 3, wherein a limiting ring protrusion is protruded from the outer peripheral wall of each kiln roller, a limiting groove is formed at the bottom of the saggar, and the limiting ring protrusion is located in the limiting groove and is in rolling connection with the saggar.

5. The lithium ion battery anode material kiln sintering system according to claim 1, wherein a mounting frame is arranged at the top of the kiln body, the outer circulation conveying line comprises a driving motor, a conveying belt, a first roller and a second roller, the driving motor is arranged on the mounting frame, the first roller and the second roller are rotatably connected to the mounting frame, the conveying belt is respectively sleeved on the first roller and the second roller, a power output shaft of the driving motor is connected with one end of the first roller, and the conveying belt is used for conveying saggars to move.

6. The lithium ion battery positive electrode material kiln sintering system according to claim 1, wherein the lifting assembly comprises a first lifting and carrying mechanism and a pick-and-place mechanism, the first lifting and carrying mechanism is respectively disposed adjacent to the outer circulation conveying line and the kiln body, the pick-and-place mechanism is disposed at a power output end of the first lifting and carrying mechanism, and the pick-and-place mechanism is configured to pick or release the sagger so as to carry the sagger of the outer circulation conveying line to the conveying mechanism for stacking.

7. The kiln sintering system for the positive electrode material of the lithium ion battery according to claim 6, wherein the first lifting and carrying mechanism comprises a first lifting support frame set, a second lifting support frame set and a first translation mechanism, the first lifting support frame set and the second lifting support frame set are arranged on two sides of the outer circulation conveying line in parallel, and the first translation mechanism is respectively installed at a power output end of the first lifting support frame set and a power output end of the second lifting support frame set, so that the first lifting support frame set and the second lifting support frame set jointly drive the first translation mechanism to move up and down; the grabbing and releasing mechanism is arranged at the power output end of the first translation mechanism.

8. The kiln sintering system for positive electrode materials of lithium ion batteries according to claim 1, wherein the bowl unloading and separating device comprises a second lifting and carrying mechanism and a rotary clamping mechanism, the second lifting and carrying mechanism is respectively disposed adjacent to the outer circulation conveying line and the kiln body, the rotary clamping mechanism is disposed at a power output end of the second lifting and carrying mechanism, and the rotary clamping mechanism is used for clamping and rotating the saggars so as to respectively unload and carry the saggars of the stacked bowl assemblies on the conveying mechanism onto the outer circulation conveying line.

9. The kiln sintering system for the positive electrode material of the lithium ion battery as claimed in claim 1, wherein a vibration leveling partition region is further arranged on the outer circulation conveying line, and the charging region and the vibration leveling partition region are sequentially arranged along the conveying direction of the outer circulation conveying line;

the sintering system of the positive electrode material kiln further comprises a vibration and leveling cutting device which is arranged above the vibration and leveling dividing area and used for vibrating and leveling and dividing the materials in the saggar into blocks.

10. A kiln sintering method for a lithium ion battery anode material, which is characterized in that the kiln sintering system for a lithium ion battery anode material according to any one of claims 1 to 9 is used for sintering, and the kiln sintering method for a lithium ion battery anode material comprises the following steps:

conveying the loaded sagger to a position corresponding to the vibrating and flattening cutting device through the external circulation conveying line;

conveying the saggars of the external circulation conveying line to the conveying mechanism through the lifting combination device to be stacked to form a combined stacked saggar;